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Kharbot B, Bulgun N, Cölfen H, Paris S. Effect of calcium-coacervate infiltration of artificial enamel caries lesions in de- and remineralizing conditions. J Dent 2024; 142:104838. [PMID: 38211686 DOI: 10.1016/j.jdent.2024.104838] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/25/2023] [Revised: 01/07/2024] [Accepted: 01/08/2024] [Indexed: 01/13/2024] Open
Abstract
OBJECTIVES Calcium-coacervate emulsions (CC) might be considered as mineral precursors to foster remineralization of carious dental hard tissues. This study analyzed the instant effect of repeated infiltration of artificial caries lesions with a CC emulsion as well as the effects of subsequent exposure of CC-infiltrated lesions to demineralizing and remineralizing environments. METHODS Bovine enamel specimens were partly covered with varnish to leave three exposed windows. Artificial enamel caries lesions were created (pH 4.95, 17d). Baseline controls (BL) were obtained by preparing a thin section of each specimen. Specimens were allocated to five groups. In three groups lesions were etched with 37 % phosphoric acid gel, infiltrated with dipotassium hydrogen phosphate and subsequently with a calcium coacervate emulsion, prepared by mixing CaCl2 ⋅ 2H2O with polyacrylic acid sodium salt (PAA-Na). Subsequently, the infiltration effect was either analyzed immediately (Inf.) or after exposition to either de- (Inf.+DS) or remineralizing solution (Inf.+RS) for 10 or 20 days, respectively. In two control groups specimens were exposed to either DS or RS, respectively without prior CC infiltration. Integrated mineral loss [ΔZ(vol%×µm)] was analyzed using transverse microradiography (TMR). RESULTS Infiltration of enamel caries lesions with coacervate solution resulted in only subtle immediate mineral gain even if repeated. When exposed to demineralizing conditions, infiltrated lesions showed significantly less mineral loss compared to untreated controls (p < 0.05; Kruskal Wallis) and exhibited characteristic mineral depositions within the lesion body. CONCLUSIONS While immediate mineral gain by infiltration was only modest, the CC-emulsion might be able to prevent demineralization in acidic conditions. CLINICAL SIGNIFICANCE Calcium coacervates might act protective against further demineralization when infiltrated into enamel caries lesions.
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Affiliation(s)
- Basel Kharbot
- Department of Operative, Preventive and Pediatric Dentistry, Center for Dental and Craniofacial Sciences, Charité - Universitätsmedizin Berlin, Aßmannshauser Str. 4-6, Berlin 14197, Germany.
| | - Neziha Bulgun
- Department of Operative, Preventive and Pediatric Dentistry, Center for Dental and Craniofacial Sciences, Charité - Universitätsmedizin Berlin, Aßmannshauser Str. 4-6, Berlin 14197, Germany
| | - Helmut Cölfen
- Physical Chemistry, Department of Chemistry, University of Konstanz, Konstanz, Germany
| | - Sebastian Paris
- Department of Operative, Preventive and Pediatric Dentistry, Center for Dental and Craniofacial Sciences, Charité - Universitätsmedizin Berlin, Aßmannshauser Str. 4-6, Berlin 14197, Germany
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Nwaigwe D, Carboni L, Mermillod M, Achard S, Dojat M. Graph-based methods coupled with specific distributional distances for adversarial attack detection. Neural Netw 2024; 169:11-19. [PMID: 37852166 DOI: 10.1016/j.neunet.2023.10.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/31/2023] [Revised: 09/26/2023] [Accepted: 10/06/2023] [Indexed: 10/20/2023]
Abstract
Artificial neural networks are prone to being fooled by carefully perturbed inputs which cause an egregious misclassification. These adversarial attacks have been the focus of extensive research. Likewise, there has been an abundance of research in ways to detect and defend against them. We introduce a novel approach of detection and interpretation of adversarial attacks from a graph perspective. For an input image, we compute an associated sparse graph using the layer-wise relevance propagation algorithm (Bach et al., 2015). Specifically, we only keep edges of the neural network with the highest relevance values. Three quantities are then computed from the graph which are then compared against those computed from the training set. The result of the comparison is a classification of the image as benign or adversarial. To make the comparison, two classification methods are introduced: (1) an explicit formula based on Wasserstein distance applied to the degree of node and (2) a logistic regression. Both classification methods produce strong results which lead us to believe that a graph-based interpretation of adversarial attacks is valuable.
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Affiliation(s)
- Dwight Nwaigwe
- Univ. Grenoble Alpes, Inria, CNRS, LJK, Grenoble, France; Univ. Grenoble Alpes, Inserm, U1216, Grenoble Institut Neurosciences, GIN, Grenoble, France
| | - Lucrezia Carboni
- Univ. Grenoble Alpes, Inria, CNRS, LJK, Grenoble, France; Univ. Grenoble Alpes, Inserm, U1216, Grenoble Institut Neurosciences, GIN, Grenoble, France
| | - Martial Mermillod
- Univ. Grenoble Alpes, Univ. Savoie Mont Blanc, CNRS, LPNC, Grenoble, France
| | - Sophie Achard
- Univ. Grenoble Alpes, Inria, CNRS, LJK, Grenoble, France
| | - Michel Dojat
- Univ. Grenoble Alpes, Inserm, U1216, Grenoble Institut Neurosciences, GIN, Grenoble, France.
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Voina D, Shea-Brown E, Mihalas S. A biologically inspired architecture with switching units can learn to generalize across backgrounds. Neural Netw 2023; 168:615-630. [PMID: 37839332 PMCID: PMC10843013 DOI: 10.1016/j.neunet.2023.09.014] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2022] [Revised: 08/24/2023] [Accepted: 09/07/2023] [Indexed: 10/17/2023]
Abstract
Humans and other animals navigate different environments effortlessly, their brains rapidly and accurately generalizing across contexts. Despite recent progress in deep learning, this flexibility remains a challenge for many artificial systems. Here, we show how a bio-inspired network motif can explicitly address this issue. We do this using a dataset of MNIST digits of varying transparency, set on one of two backgrounds of different statistics that define two contexts: a pixel-wise noise or a more naturalistic background from the CIFAR-10 dataset. After learning digit classification when both contexts are shown sequentially, we find that both shallow and deep networks have sharply decreased performance when returning to the first background - an instance of the catastrophic forgetting phenomenon known from continual learning. To overcome this, we propose the bottleneck-switching network or switching network for short. This is a bio-inspired architecture analogous to a well-studied network motif in the visual cortex, with additional "switching" units that are activated in the presence of a new background, assuming a priori a contextual signal to turn these units on or off. Intriguingly, only a few of these switching units are sufficient to enable the network to learn the new context without catastrophic forgetting through inhibition of redundant background features. Further, the bottleneck-switching network can generalize to novel contexts similar to contexts it has learned. Importantly, we find that - again as in the underlying biological network motif, recurrently connecting the switching units to network layers is advantageous for context generalization.
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Affiliation(s)
- Doris Voina
- Department of Applied Mathematics, Computational Neuroscience Center, University of Washington, Seattle, WA 98195, USA.
| | - Eric Shea-Brown
- Department of Applied Mathematics, Computational Neuroscience Center, University of Washington, Seattle, WA 98195, USA; Allen Institute for Brain Science, 615 Westlake Ave N, Seattle, WA 98109, USA
| | - Stefan Mihalas
- Department of Applied Mathematics, Computational Neuroscience Center, University of Washington, Seattle, WA 98195, USA; Allen Institute for Brain Science, 615 Westlake Ave N, Seattle, WA 98109, USA
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4
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Tang Z, Yang K, Wang H, Cui Z, Jin X, Peng Y, Liu P. Bio-inspired soft pneumatic actuator based on a kresling-like pattern with a rigid skeleton. J Adv Res 2023:S2090-1232(23)00296-5. [PMID: 37832845 DOI: 10.1016/j.jare.2023.10.004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2023] [Revised: 09/28/2023] [Accepted: 10/04/2023] [Indexed: 10/15/2023] Open
Abstract
INTRODUCTION Biomimetic soft pneumatic actuators (SPA) with Kresling origami patterns have unique advantages over conventional rigid robots, owing to their adaptability and safety. OBJECTIVES Inspired by cloning and moving behaviors observed from salps, we proposed an SPA based on a Kresling-like pattern with a rigid skeleton. The elongation and output force were tested, and the effectiveness of the applications with the SPA was evaluated. METHODS The proposed SPA consists of rigid skeletons and a soft skin. The rigid skeletons are constructed using layers of Kresling-like patterns, while a novel extensible inserting structure is devised to replace the folds found in conventional Kresling patterns. This innovative approach ensures that the SPA exhibits axial contraction/expansion motion without any twisting movement. To mimic the bionic characteristics of swimming and ingesting progress of salps, the proposed SPA can perform an axial contraction motion without twisting and a controllable bending motion based on multi-layered Kresling-like patterns; to mimic the cloning and releasing life phenomena of salps, the number of layers of Kresling-like patterns is changeable by adding or reducing skeleton components according to the practical needs. RESULTS The experimental elongation results on the SPA with multiple layers of Kresling-like patterns show that the elongation can increase to above 162% by adding layers; the experimental output force results show that the three-layer SPA can provide 6.36 N output force at an air flow rate of 10 L/min, and the output force will continue to increase as the number of layers of Kresling-like pattern increases or the air flow rate increases. Further, we demonstrate the applications of the SPA in soft grippers, scissor grippers, claw grippers and pipe crawlers. CONCLUSION Our proposed SPA can avoid twisting in the radial contraction motion with high elongation and output force, and provide the practical guidance for bio-inspired soft robotic applications.
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Affiliation(s)
- Zhichuan Tang
- Industrial Design Institute, Zhejiang University of Technology, Hangzhou 310014, China; Modern Industrial Design Institute, Zhejiang University, Hangzhou 310013, China.
| | - Keshuai Yang
- Industrial Design Institute, Zhejiang University of Technology, Hangzhou 310014, China
| | - Hang Wang
- Industrial Design Institute, Zhejiang University of Technology, Hangzhou 310014, China
| | - Zhixuan Cui
- Industrial Design Institute, Zhejiang University of Technology, Hangzhou 310014, China
| | - Xiaoneng Jin
- Industrial Design Institute, Zhejiang University of Technology, Hangzhou 310014, China
| | - Yuxin Peng
- College of Education, Zhejiang University, Hangzhou 310058, China
| | - Pengcheng Liu
- Department of Computer Science, University of York, York YO10 5DD, United Kingdom
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Houssein EH, Oliva D, Samee NA, Mahmoud NF, Emam MM. Liver Cancer Algorithm: A novel bio-inspired optimizer. Comput Biol Med 2023; 165:107389. [PMID: 37678138 DOI: 10.1016/j.compbiomed.2023.107389] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2023] [Revised: 08/04/2023] [Accepted: 08/25/2023] [Indexed: 09/09/2023]
Abstract
This paper introduces a new bio-inspired optimization algorithm named the Liver Cancer Algorithm (LCA), which mimics the liver tumor growth and takeover process. It uses an evolutionary search approach that simulates the behavior of liver tumors when taking over the liver organ. The tumor's ability to replicate and spread to other organs inspires the algorithm. LCA algorithm is developed using genetic operators and a Random Opposition-Based Learning (ROBL) strategy to efficiently balance local and global searches and explore the search space. The algorithm's efficiency is tested on the IEEE Congress of Evolutionary Computation in 2020 (CEC'2020) benchmark functions and compared to seven widely used metaheuristic algorithms, including Genetic Algorithm (GA), particle swarm optimization (PSO), Differential Evolution (DE), Adaptive Guided Differential Evolution Algorithm (AGDE), Improved Multi-Operator Differential Evolution (IMODE), Harris Hawks Optimization (HHO), Runge-Kutta Optimization Algorithm (RUN), weIghted meaN oF vectOrs (INFO), and Coronavirus Herd Immunity Optimizer (CHIO). The statistical results of the convergence curve, boxplot, parameter space, and qualitative metrics show that the LCA algorithm performs competitively compared to well-known algorithms. Moreover, the versatility of the LCA algorithm extends beyond mathematical benchmark problems. It was also successfully applied to tackle the feature selection problem and optimize the support vector machine for various biomedical data classifications, resulting in the creation of the LCA-SVM model. The LCA-SVM model was evaluated in a total of twelve datasets, among which the MonoAmine Oxidase (MAO) dataset stood out, showing the highest performance compared to the other datasets. In particular, the LCA-SVM model achieved an impressive accuracy of 98.704% on the MAO dataset. This outstanding result demonstrates the efficacy and potential of the LCA-SVM approach in handling complex datasets and producing highly accurate predictions. The experimental results indicate that the LCA algorithm surpasses other methods to solve mathematical benchmark problems and feature selection.
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Affiliation(s)
- Essam H Houssein
- Faculty of Computers and Information, Minia University, Minia, Egypt.
| | - Diego Oliva
- Depto. Innovación Basada en la Información y el Conocimiento, Universidad de Guadalajara, CUCEI, Guadalajara, Jal, Mexico.
| | - Nagwan Abdel Samee
- Department of Information Technology, College of Computer and Information Sciences, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia.
| | - Noha F Mahmoud
- Rehabilitation Sciences Department, Health and Rehabilitation Sciences College, Princess Nourah bint Abdulrahman University, P.O. Box 84428, Riyadh 11671, Saudi Arabia.
| | - Marwa M Emam
- Faculty of Computers and Information, Minia University, Minia, Egypt.
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Lässig F, Aceituno PV, Sorbaro M, Grewe BF. Bio-inspired, task-free continual learning through activity regularization. Biol Cybern 2023; 117:345-361. [PMID: 37589728 PMCID: PMC10600047 DOI: 10.1007/s00422-023-00973-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/30/2022] [Accepted: 08/06/2023] [Indexed: 08/18/2023]
Abstract
The ability to sequentially learn multiple tasks without forgetting is a key skill of biological brains, whereas it represents a major challenge to the field of deep learning. To avoid catastrophic forgetting, various continual learning (CL) approaches have been devised. However, these usually require discrete task boundaries. This requirement seems biologically implausible and often limits the application of CL methods in the real world where tasks are not always well defined. Here, we take inspiration from neuroscience, where sparse, non-overlapping neuronal representations have been suggested to prevent catastrophic forgetting. As in the brain, we argue that these sparse representations should be chosen on the basis of feed forward (stimulus-specific) as well as top-down (context-specific) information. To implement such selective sparsity, we use a bio-plausible form of hierarchical credit assignment known as Deep Feedback Control (DFC) and combine it with a winner-take-all sparsity mechanism. In addition to sparsity, we introduce lateral recurrent connections within each layer to further protect previously learned representations. We evaluate the new sparse-recurrent version of DFC on the split-MNIST computer vision benchmark and show that only the combination of sparsity and intra-layer recurrent connections improves CL performance with respect to standard backpropagation. Our method achieves similar performance to well-known CL methods, such as Elastic Weight Consolidation and Synaptic Intelligence, without requiring information about task boundaries. Overall, we showcase the idea of adopting computational principles from the brain to derive new, task-free learning algorithms for CL.
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Affiliation(s)
- Francesco Lässig
- Institute of Neuroinformatics University of Zürich and ETH, Zürich, Switzerland
| | | | - Martino Sorbaro
- Institute of Neuroinformatics University of Zürich and ETH, Zürich, Switzerland
- AI Center, ETH, Zürich, Switzerland
| | - Benjamin F. Grewe
- Institute of Neuroinformatics University of Zürich and ETH, Zürich, Switzerland
- AI Center, ETH, Zürich, Switzerland
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7
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Zhao S, Yin X, Zhang D. A study of a bio-inspired impact resistant carbon fiber laminate with a sinusoidal helicoidal structure in the mandibles of trap-jaw ants. Acta Biomater 2023; 169:179-191. [PMID: 37517616 DOI: 10.1016/j.actbio.2023.07.047] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2023] [Revised: 07/08/2023] [Accepted: 07/25/2023] [Indexed: 08/01/2023]
Abstract
The majority of living organisms demonstrate remarkable attributes and have evolved effective mechanisms for synthesizing impact-resistant and damage-tolerant structures. One exemplary instance is the rapid mandible strikes exhibited by trap-jaw ants, which are a highly aggressive species of terrestrial social organisms. An impact-resistant sinusoidal helicoidal architecture is discovered in the mandibles of trap-jaw ants. The bioinspired laminate with a bi-sinusoidal helicoidal structure was manufactured using unidirectional carbon fiber prepreg by mold press forming. This study examines the impact resistance and damage tolerance of a bionic laminate through low velocity impact, computed tomography, and compression after impact tests. The results demonstrate that bionic laminates effectively limit damage propagation within the plane while enhancing energy dissipation capacity. The sinusoidal helicoidal configuration enhances cushioning capability against impact forces, retards penetration under higher loads, hinders crack propagation, and improves residual strength. Bionic laminates provide a valuable solution for damage tolerance through the resistance to through-the-thickness loads. STATEMENT OF SIGNIFICANCE: Helicoidal and sinusoidal helicoidal microstructures have been identified in the cross-section of the jaws of trap-jaw ants. The multiple waviness ratio parameters are designed for fabricating a sinusoidal helicoidal structure laminate using unidirectional carbon fiber prepreg through the mold press forming technique. This results in a damage-tolerant mechanism characterized by reduced delamination damage, which leads to a stiffer mechanical response. Meanwhile, it enhances resistance to crack propagation, leading to the formation of discontinuous delamination areas and the accumulation of sub-critical failures. Additionally, the sinusoidal helicoidal structure laminate combines the cushioning performance of bi-sinusoidal arrangements with the enhanced impact resistance of helical arrangements. This design delays penetration at higher loads, resulting in increased residual strength.
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Affiliation(s)
- Shicai Zhao
- School of Mechanical Engineering and Automation, Beihang University, Beijing, 100091, PR China; Institute of Bionic and Micro-Nano Systems, Beihang University, Beijing, 100091, PR China
| | - Xiaoming Yin
- School of Mechanical Engineering and Automation, Beihang University, Beijing, 100091, PR China; Institute of Bionic and Micro-Nano Systems, Beihang University, Beijing, 100091, PR China
| | - Deyuan Zhang
- School of Mechanical Engineering and Automation, Beihang University, Beijing, 100091, PR China; Institute of Bionic and Micro-Nano Systems, Beihang University, Beijing, 100091, PR China.
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8
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Chang Z, Fu Q, Chen H, Li H, Peng J. A look into feedback neural computation upon collision selectivity. Neural Netw 2023; 166:22-37. [PMID: 37480767 DOI: 10.1016/j.neunet.2023.06.039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/19/2022] [Revised: 05/20/2023] [Accepted: 06/27/2023] [Indexed: 07/24/2023]
Abstract
Physiological studies have shown that a group of locust's lobula giant movement detectors (LGMDs) has a diversity of collision selectivity to approaching objects, relatively darker or brighter than their backgrounds in cluttered environments. Such diversity of collision selectivity can serve locusts to escape from attack by natural enemies, and migrate in swarm free of collision. For computational studies, endeavours have been made to realize the diverse selectivity which, however, is still one of the most challenging tasks especially in complex and dynamic real world scenarios. The existing models are mainly formulated as multi-layered neural networks with merely feed-forward information processing, and do not take into account the effect of re-entrant signals in feedback loop, which is an essential regulatory loop for motion perception, yet never been explored in looming perception. In this paper, we inaugurate feedback neural computation for constructing a new LGMD-based model, named F-LGMD to look into the efficacy upon implementing different collision selectivity. Accordingly, the proposed neural network model features both feed-forward processing and feedback loop. The feedback control propagates output signals of parallel ON/OFF channels back into their starting neurons, thus makes part of the feed-forward neural network, i.e. the ON/OFF channels and the feedback loop form an iterative cycle system. Moreover, the feedback control is instantaneous, which leads to the existence of a fixed point whereby the fixed point theorem is applied to rigorously derive valid range of feedback coefficients. To verify the effectiveness of the proposed method, we conduct systematic experiments covering synthetic and natural collision datasets, and also online robotic tests. The experimental results show that the F-LGMD, with a unified network, can fulfil the diverse collision selectivity revealed in physiology, which not only reduces considerably the handcrafted parameters compared to previous studies, but also offers a both efficient and robust scheme for collision perception through feedback neural computation.
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Affiliation(s)
- Zefang Chang
- Machine Life and Intelligence Research Centre, School of Mathematics and Information Science, Guangzhou University, China
| | - Qinbing Fu
- Machine Life and Intelligence Research Centre, School of Mathematics and Information Science, Guangzhou University, China
| | - Hao Chen
- Machine Life and Intelligence Research Centre, School of Mathematics and Information Science, Guangzhou University, China
| | - Haiyang Li
- Machine Life and Intelligence Research Centre, School of Mathematics and Information Science, Guangzhou University, China
| | - Jigen Peng
- Machine Life and Intelligence Research Centre, School of Mathematics and Information Science, Guangzhou University, China.
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Li N, Zhang T, Wang R, Sun Y, Chu L, Lu X, Sun K. Homotypic targeted nanoplatform enable efficient chemoimmunotherapy and reduced DOX cardiotoxicity in chemoresistant cancer via TGF-β1 blockade. J Control Release 2023; 361:147-160. [PMID: 37536544 DOI: 10.1016/j.jconrel.2023.07.063] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/18/2023] [Revised: 07/18/2023] [Accepted: 07/31/2023] [Indexed: 08/05/2023]
Abstract
Doxorubicin (DOX) with broad-spectrum antitumor activity has been reported to induce effective immunogenic cell death (ICD) effect. However, the serious cardiotoxicity and chemoresistance severely restrict the widely clinical application of DOX. Herein, for the first time, a bio-inspired nanoplatform via co-assembly of DOX-conjugated polyethyleneimine (PEI-DOX), cancer cell membrane (CCM) and TGF-β1 siRNA (siTGF-β1) was rationally designed, which can not only overcome the drawbacks of DOX but also display high capability to modulate the tumor microenvironment and prevent the tumor progressing and metastasis. Experimental studies confirmed the pH-sensitivity of PEI-DOX and the homotypic-targeting and immuno-escapable ability of CCM, resulting an enhanced accumulation of DOX and siTGF-β1 in tumor sites. In addition to this, the bio-inspired nanoplatform could also improve the stability and facilitate the endosomal escape of siTGF-β1. All these effects ensured the silence efficiency of siTGF-β1 in tumor sites, which could further modulate the chemoresistant and immunosuppressive tumor microenvironment, resulting a synergistic effect with DOX to prevent tumor progressing and metastasis. Additionally, even trapped in cardiac tissues, siTGF-β1 could inhibit the production of TGF-β1 and ROS induced by DOX, resulting a reduced myocardial damage. Therefore, our newly designed bio-inspired nano-delivery system may be a promising nanoplatform with efficient chemoimmunotherapy to ameliorate DOX-induced cardiotoxicity and combat tumor growth and metastasis in chemoresistant cancer.
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Affiliation(s)
- Nuannuan Li
- Key Laboratory of Molecular Pharmacology and Drug Evaluation (Yantai University), School of Pharmacy, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Ministry of Education, Yantai University, Yantai, China
| | - Tianyu Zhang
- Key Laboratory of Molecular Pharmacology and Drug Evaluation (Yantai University), School of Pharmacy, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Ministry of Education, Yantai University, Yantai, China
| | - Ru Wang
- Key Laboratory of Molecular Pharmacology and Drug Evaluation (Yantai University), School of Pharmacy, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Ministry of Education, Yantai University, Yantai, China
| | - Yiying Sun
- Yantai Saipute Analyzing Service Co. Ltd, Yantai, Shandong Province, China
| | - Liuxiang Chu
- Key Laboratory of Molecular Pharmacology and Drug Evaluation (Yantai University), School of Pharmacy, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Ministry of Education, Yantai University, Yantai, China
| | - Xiaoyan Lu
- Key Laboratory of Molecular Pharmacology and Drug Evaluation (Yantai University), School of Pharmacy, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Ministry of Education, Yantai University, Yantai, China
| | - Kaoxiang Sun
- Key Laboratory of Molecular Pharmacology and Drug Evaluation (Yantai University), School of Pharmacy, Collaborative Innovation Center of Advanced Drug Delivery System and Biotech Drugs in Universities of Shandong, Ministry of Education, Yantai University, Yantai, China.
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10
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Wu X, Zhu H, Che J, Xu Y, Tan Q, Zhao Y. Stem cell niche-inspired microcarriers with ADSCs encapsulation for diabetic wound treatment. Bioact Mater 2023; 26:159-168. [PMID: 36923266 PMCID: PMC10008968 DOI: 10.1016/j.bioactmat.2023.02.031] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 01/26/2023] [Accepted: 02/27/2023] [Indexed: 03/06/2023] Open
Abstract
Stem cell therapies have made great progress in the treatment of diabetic wounds during recent decades, while their short in vivo residence, alloimmune reactions, undesired behaviors, and dramatic losses of cell functions still hinder the translation of them into clinic. Here, inspired by the natural components of stem cell niches, we presented novel microfluidic hydrogel microcarriers with extracellular matrix (ECM)-like composition and adipose-derived stem cells (ADSCs) encapsulation for diabetic wound healing. As the hydrogel was synthesized by conjugating hyaluronic acid methacryloyl (HAMA) onto the Fibronectin (FN) molecule chain (FN-HAMA), the laden ADSCs in the microcarriers showed improved bioactivities and pro-regenerative capabilities. Based on these features, we have demonstrated that these ADSCs microcarriers exhibited significant promotion of neovascularization, follicular rejuvenation, and collagen deposition in a mouse diabetic wound model. These results indicated that the stem cell niche-inspired FN-HAMA microcarriers with ADSCs encapsulation have great clinical potential for diabetic wound treatment.
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Affiliation(s)
- Xiangyi Wu
- Department of Burns and Plastic Surgery, Institute of Translational Medicine, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, 210002, China
| | - Haofang Zhu
- Department of Burns and Plastic Surgery, Institute of Translational Medicine, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, 210002, China
| | - Junyi Che
- Department of Burns and Plastic Surgery, Institute of Translational Medicine, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, 210002, China
| | - Ye Xu
- Department of Burns and Plastic Surgery, Institute of Translational Medicine, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, 210002, China
- Corresponding author.
| | - Qian Tan
- Department of Burns and Plastic Surgery, Institute of Translational Medicine, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, 210002, China
- Corresponding author.
| | - Yuanjin Zhao
- Department of Burns and Plastic Surgery, Institute of Translational Medicine, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, 210002, China
- Oujiang Laboratory (Zhejiang Lab for Regenerative Medicine, Vision and Brain Health), Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, Zhejiang, 325000, China
- Corresponding author. Department of Burns and Plastic Surgery, Institute of Translational Medicine, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing, 210002, China.
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11
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Sanshita, Pahal S, Ghate V, Singh I. Novel bio-inspired microneedles for wound healing applications. Expert Opin Drug Deliv 2023; 20:1463-1465. [PMID: 37933474 DOI: 10.1080/17425247.2023.2279116] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/04/2023] [Accepted: 10/31/2023] [Indexed: 11/08/2023]
Affiliation(s)
- Sanshita
- Chitkara College of Pharmacy, Chitkara University, Rajpura, Punjab, India
| | - Suman Pahal
- Integrative Chemical Biology, Institute for Stem Cell Science and Regenerative Medicine, Bengaluru, India
| | - Vivek Ghate
- Yenepoya Technology Incubator, Yenepoya (Deemed to be University), Mangaluru, Karnataka, India
| | - Inderbir Singh
- Chitkara College of Pharmacy, Chitkara University, Rajpura, Punjab, India
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12
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Harvey C, de Croon G, Taylor GK, Bomphrey RJ. Lessons from natural flight for aviation: then, now and tomorrow. J Exp Biol 2023; 226:307084. [PMID: 37066792 DOI: 10.1242/jeb.245409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/18/2023]
Abstract
Powered flight was once a capability limited only to animals, but by identifying useful attributes of animal flight and building on these with technological advances, engineers have pushed the frontiers of flight beyond our predecessors' wildest imaginations. Yet, there remain many key characteristics of biological flight that elude current aircraft design, motivating a careful re-analysis of what we have learned from animals already, and how this has been revealed experimentally, as well as a specific focus on identifying what remains unknown. Here, we review the literature to identify key contributions that began in biology and have since been translated into aeronautical devices or capabilities. We identify central areas for future research and highlight the importance of maintaining an open line of two-way communication between biologists and engineers. Such interdisciplinary, bio-informed analyses continue to push forward the frontiers of aeronautics and experimental biology alike.
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Affiliation(s)
- Christina Harvey
- Mechanical and Aerospace Engineering, University of California, Davis, Davis, CA 95616, USA
| | - Guido de Croon
- Micro Air Vehicle Laboratory, Control and Simulation, Faculty of Aerospace Engineering, Delft University of Technology, 2629 HS Delft, The Netherlands
| | - Graham K Taylor
- Department of Biology, University of Oxford, Oxford OX1 3SZ, UK
| | - Richard J Bomphrey
- Structure and Motion Laboratory, Department of Comparative Biomedical Sciences, Royal Veterinary College, Hatfield AL9 7TA, UK
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13
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Zong W, Gao H, Ouyang Y, Chu K, Guo H, Zhang L, Zhang W, Chen R, Dai Y, Guo F, Zhu J, Zhang Z, Ye C, Miao YE, Hofkens J, Lai F, Liu T. Bio-Inspired Aerobic-Hydrophobic Janus Interface on Partially Carbonized Iron Heterostructure Promotes Bifunctional Nitrogen Fixation. Angew Chem Int Ed Engl 2023:e202218122. [PMID: 37081751 DOI: 10.1002/anie.202218122] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/08/2022] [Revised: 04/11/2023] [Accepted: 04/19/2023] [Indexed: 04/22/2023]
Abstract
Overwhelming competition from hydrogen/oxygen evolution reactions and low solubility of N2 in aqueous systems drain on selectivity and activity on nitrogen fixation reaction. Herein, we design an aerobic-hydrophobic Janus structure by introducing fluorinated modification on porous carbon nanofibers embedded with partially carbonized iron heterojunctions (Fe3C/Fe@PCNF-F). The simulations prove that the Janus structure can keep the internal Fe3C/Fe@PCNF-F away from water infiltration and endow a N2 molecule-concentrating effect, suppressing the competing reactions and overcoming the mass-transfer limitations to build a robust "quasi-solid-gas" state micro-domain around the catalyst surface. In this proof-of-concept system, the Fe3C/Fe@PCNF-F exhibits excellent electrocatalytic performance for nitrogen fixation (NH3 yield rate up to 29.2 μg h-1 mg-1cat. and Faraday efficiency (FE) up to 27.8% in NRR; NO3- yield rate up to 15.7 μg h-1 mg-1cat. and FE up to 3.4 % in NOR).
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Affiliation(s)
- Wei Zong
- Jiangnan University, School of Chemical and Material Engineering, CHINA
| | - Haiqi Gao
- Nanjing University of Posts and Telecommunications, Institute of Advanced Materials, CHINA
| | - Yue Ouyang
- Donghua University, College of Materials Science and Engineering, CHINA
| | - Kaibin Chu
- Jiangnan University, School of Chemical and Material Engineering, CHINA
| | - Hele Guo
- KU Leuven University: Katholieke Universiteit Leuven, Department of Chemistry, BELGIUM
| | - Leiqian Zhang
- Jiangnan University, School of Chemical and Material Engineering, CHINA
| | - Wei Zhang
- University College London, Department of Chemistry, UNITED KINGDOM
| | - Ruwei Chen
- University College London, Department of Chemistry, UNITED KINGDOM
| | - Yuhang Dai
- University College London, Department of Chemistry, UNITED KINGDOM
| | - Fei Guo
- University College London, Department of Chemistry, UNITED KINGDOM
| | - Jiexin Zhu
- University College London, Department of Chemistry, UNITED KINGDOM
| | - Zhenfang Zhang
- University College London, Department of Chemistry, UNITED KINGDOM
| | - Chumei Ye
- University of Cambridge, Department of Materials Science and Metallurgy, UNITED KINGDOM
| | - Yue-E Miao
- Donghua University, College of Materials Science and Engineering, CHINA
| | - Johan Hofkens
- KU Leuven: Katholieke Universiteit Leuven, Department of Chemistry, BELGIUM
| | - Feili Lai
- KU Leuven: Katholieke Universiteit Leuven, Department of Chemistry, Celestijnenlaan 200F, Leuven, BELGIUM
| | - Tianxi Liu
- Jiangnan University, School of Chemical and Material Engineering, CHINA
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14
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Ma S, Shi W, Li H, Zhang Y. Biomimetic mineralization of nacre-inspired multiple crosslinked PVA/CaAlg/SiO 2 membrane with simultaneously enhanced mechanical and separation properties. Int J Biol Macromol 2023; 234:123650. [PMID: 36791940 DOI: 10.1016/j.ijbiomac.2023.123650] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/17/2022] [Revised: 02/01/2023] [Accepted: 02/08/2023] [Indexed: 02/15/2023]
Abstract
Inspired by the natural nacre structure, we propose a new strategy to fabricate mineralized, multiple crosslinked hydrogel membranes with the "rigid silica in soft polymer" nacre-like structure. In-situ SiO2 nanoparticles (NPs) and polyvinyl alcohol/sodium alginate (PVA/NaAlg) are used to simulate the rigid "bricks" and soft "mortar" compositions of nacre, respectively. The nacre-like mineralized (PVA/CaAlg/SiO2) membrane showed a higher tensile strength of 4.1 ± 0.08 MPa, excellent pure water flux of 170 ± 3 L/m2h, and an oil/water rejection rate of 99 %. The interwoven hierarchal structure, similar to nacre, was determined by SEM analysis. In addition, incorporating SiO2 NPs increases the anti-swelling, roughness, and hydrophilicity of the membranes. PVA/CaAlg/SiO2 membrane exhibited excellent superhydrophilicity (WCA value was 0°) and superoleophobicity underwater (OCA value was 162°). PVA/CaAlg/SiO2 membrane also showed excellent separation performance for water-soluble organic pollutants and can be used for dye separation with rejection efficiencies of 99.5 %, 99.1 %, and 98.3 % for Congo red (CR), Alizarin red (AR), and Sunset yellow (SY), respectively. Moreover, PVA/CaAlg/SiO2 membrane had outstanding long-term filtration and antifouling performance. The biomineralization-inspired structure provides a promising technique that can be used to prepare high-performance organic-inorganic membranes with great promise for wastewater separation application.
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Affiliation(s)
- Sisi Ma
- School of Textiles Engineering, Henan University of Engineering, Zhengzhou 450007, PR China.
| | - Wenying Shi
- School of Textiles Engineering, Henan University of Engineering, Zhengzhou 450007, PR China
| | - Hongbin Li
- School of Textiles Engineering, Henan University of Engineering, Zhengzhou 450007, PR China
| | - Yifeng Zhang
- Collaborative Innovation Center of Advanced Textile Equipment and Technology by MOE and Henan Provincial Government, Zhengzhou 450007, PR China
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15
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Yadipour M, Billah MA, Faruque IA. Optic flow enrichment via Drosophila head and retina motions to support inflight position regulation. J Theor Biol 2023; 562:111416. [PMID: 36681182 DOI: 10.1016/j.jtbi.2023.111416] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2021] [Revised: 12/13/2022] [Accepted: 01/11/2023] [Indexed: 01/20/2023]
Abstract
Developing a functional description of the neural control circuits and visual feedback paths underlying insect flight behaviors is an active research area. Feedback controllers incorporating engineering models of the insect visual system outputs have described some flight behaviors, yet they do not explain how insects are able to stabilize their body position relative to nearby targets such as neighbors or forage sources, especially in challenging environments in which optic flow is poor. The insect experimental community is simultaneously recording a growing library of in-flight head and eye motions that may be linked to increased perception. This study develops a quantitative model of the optic flow experienced by a flying insect or robot during head yawing rotations (distinct from lateral peering motions in previous work) with a single other target in view. This study then applies a model of insect visuomotor feedback to show via analysis and simulation of five species that these head motions sufficiently enrich the optic flow and that the output feedback can provide relative position regulation relative to the single target (asymptotic stability). In the simplifying case of pure rotation relative to the body, theoretical analysis provides a stronger stability guarantee. The results are shown to be robust to anatomical neck angle limits and body vibrations, persist with more detailed Drosophila lateral-directional flight dynamics simulations, and generalize to recent retinal motion studies. Together, these results suggest that the optic flow enrichment provided by head or pseudopupil rotation could be used in an insect's neural processing circuit to enable position regulation.
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Affiliation(s)
- Mehdi Yadipour
- School of Mechanical and Aerospace Engineering, Oklahoma State University, Stillwater, OK, 74078, USA.
| | - Md Arif Billah
- School of Mechanical and Aerospace Engineering, Oklahoma State University, Stillwater, OK, 74078, USA.
| | - Imraan A Faruque
- School of Mechanical and Aerospace Engineering, Oklahoma State University, Stillwater, OK, 74078, USA.
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16
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Kulandaivel S, Lin CH, Yeh YC. A bioinspired copper-based coordination polymer for the detection of pheochromocytoma biomarkers. Talanta 2023; 255:124206. [PMID: 36563506 DOI: 10.1016/j.talanta.2022.124206] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Revised: 12/15/2022] [Accepted: 12/17/2022] [Indexed: 12/23/2022]
Abstract
Oxidase-mimicking (catechol oxidase/laccase) nanozymes provide outstanding specificity in the detection of epinephrine (Epi) for the assessment of pheochromocytoma; however, epinephrine (Epi) and norepinephrine (NE) co-existing in the same systems will reduce the selectivity of the biosensor. In the current study, we synthesized copper-based coordination polymer (Cu-CP) nanozymes capable of accelerating the oxidation of Epi with high specificity. Furthermore, the Cu-CP is able to detect Epi over a wide linear range of 0.5-100 μM with a low detection limit of 0.36 μM while providing excellent stability and recyclability. Furthermore, we employed colorimetric and fluorescence signals for sequential detection of the coexistence of Epi and NE for use in tracking the treatment outcomes of patients with pheochromocytoma. Experiments using artificial urine further confirmed the efficacy of the proposed system.
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Affiliation(s)
| | - Chia-Her Lin
- Department of Chemistry, National Taiwan Normal University, Taipei, 116, Taiwan.
| | - Yi-Chun Yeh
- Department of Chemistry, National Taiwan Normal University, Taipei, 116, Taiwan.
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17
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Rabie AH, Saleh AI, Mansour NA. Red piranha optimization (RPO): a natural inspired meta-heuristic algorithm for solving complex optimization problems. J Ambient Intell Humaniz Comput 2023; 14:7621-7648. [PMID: 37228700 PMCID: PMC10020777 DOI: 10.1007/s12652-023-04573-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 01/31/2022] [Accepted: 02/15/2023] [Indexed: 05/27/2023]
Abstract
An optimization algorithm is a step-by-step procedure which aims to achieve an optimum value (maximum or minimum) of an objective function. Several natural inspired meta-heuristic algorithms have been inspired to solve complex optimization problems by utilizing the potential advantages of swarm intelligence. In this paper, a new nature-inspired optimization algorithm which mimics the social hunting behavior of Red Piranha is developed, which is called Red Piranha Optimization (RPO). Although the piranha fish is famous for its extreme ferocity and thirst for blood, it sets the best examples of cooperation and organized teamwork, especially in the case of hunting or saving their eggs. The proposed RPO is established through three sequential phases, namely; (i) searching for a prey, (ii) encircling the prey, and (iii) attacking the prey. A mathematical model is provided for each phase of the proposed algorithm. RPO has salient properties such as; (i) it is very simple and easy to implement, (ii) it has a perfect ability to bypass local optima, and (iii) it can be employed for solving complex optimization problems covering different disciplines. To ensure the efficiency of the proposed RPO, it has been applied in feature selection, which is one of the important steps in solving the classification problem. Hence, recent bio-inspired optimization algorithms as well as the proposed RPO have been employed for selecting the most important features for diagnosing Covid-19. Experimental results have proven the effectiveness of the proposed RPO as it outperforms the recent bio-inspired optimization techniques according to accuracy, execution time, micro average precision, micro average recall, macro average precision, macro average recall, and f-measure calculations.
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Affiliation(s)
- Asmaa H. Rabie
- Computers and Control Department, Faculty of Engineering Mansoura University, Mansoura, Egypt
| | - Ahmed I. Saleh
- Computers and Control Department, Faculty of Engineering Mansoura University, Mansoura, Egypt
| | - Nehal A. Mansour
- Computers and Control Department, Faculty of Engineering Mansoura University, Mansoura, Egypt
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18
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Shan J, Zhang X, Cheng Y, Song C, Chen G, Gu Z, Zhao Y. Glucose metabolism-inspired catalytic patches for NIR-II phototherapy of diabetic wound infection. Acta Biomater 2023; 157:200-209. [PMID: 36494009 DOI: 10.1016/j.actbio.2022.12.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/09/2022] [Revised: 11/24/2022] [Accepted: 12/01/2022] [Indexed: 12/12/2022]
Abstract
Medical patches hold great prospects for diabetic wound administration, while their practical effects in diabetic wound management remain mired by the complexity of wound microenvironments. Here, inspired by the biological processes of glucose metabolism, we present a catalytic microneedle patch that encapsulates near-infrared-II responsive and dual-nanozyme active Au-Cu2MoS4 nanosheets (Au-CMS NSs) for treating diabetic wound infection. Since microneedle patches have great tissue penetration ability, the Au-CMS NSs can be delivered to deep tissues and fully interact with wound environments. Benefitting from the dual nanozyme activities (glucose oxidase and catalase) and near-infrared-II photothermal performances of Au-CMS NSs, the composited catalytic patch realizes in situ glucose consumption, oxygen generation, and bacterial elimination. Notably, their repeatability of near-infrared-II responsive antibacterial capability has been proved both in vitro and in diabetic mice against methicillin-resistant Staphylococcus aureus. The catalytic patch can find wide catalytic applications in wound care and infection prevention. STATEMENT OF SIGNIFICANCE: Effective treatment of diabetic wound infection remains still challenging in the clinic owing to the complex wound microenvironments. Herein, inspired by the biological processes of glucose metabolism in lives, we propose a novel strategy to treat wound infections by modulating the diabetic wound microenvironments. A near-infrared-II (NIR-II) responsive biocatalytic microneedle patch with both glucose oxidase- and catalase-like activities capable of killing bacteria, reducing glucose level, and supplying O2 is developed. The patch not only achieves efficient antibacterial outcomes in vitro, but also is a valuable wound patch for efficient treatment of MRSA-infected wounds in diabetic mice. We anticipate that this therapeutic strategy will provide the applications in chronic inflammation and infections.
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Affiliation(s)
- Jingyang Shan
- Department of Rheumatology and Immunology, Nanjing Drum Tower Hospital, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China; Department of Neurology, Shenzhen Institute of Translational Medicine, The First Affiliated Hospital of Shenzhen University, Shenzhen Second People's Hospital, Shenzhen 518000, China; Oujiang Laboratory (Zhejiang Lab for Regenerative Medicine, Vision and Brain Health), Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, Zhejiang 325001, China
| | - Xiaoxuan Zhang
- Department of Rheumatology and Immunology, Nanjing Drum Tower Hospital, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
| | - Yi Cheng
- Department of Rheumatology and Immunology, Nanjing Drum Tower Hospital, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
| | - Chuanhui Song
- Department of Rheumatology and Immunology, Nanjing Drum Tower Hospital, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
| | - Guopu Chen
- Department of Rheumatology and Immunology, Nanjing Drum Tower Hospital, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China.
| | - Zhuxiao Gu
- Department of Rheumatology and Immunology, Nanjing Drum Tower Hospital, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China.
| | - Yuanjin Zhao
- Department of Rheumatology and Immunology, Nanjing Drum Tower Hospital, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China; Oujiang Laboratory (Zhejiang Lab for Regenerative Medicine, Vision and Brain Health), Wenzhou Institute, University of Chinese Academy of Sciences, Wenzhou, Zhejiang 325001, China.
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19
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Lee J, Park E, Lee K, Shin M, Lee S, Moreno-Villaécija MÁ, Lee H. Reversible tissue sticker inspired by chemistry in plant-pathogen relationship. Acta Biomater 2023; 155:247-257. [PMID: 36216125 DOI: 10.1016/j.actbio.2022.09.075] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/28/2022] [Revised: 09/26/2022] [Accepted: 09/29/2022] [Indexed: 02/02/2023]
Abstract
Plants release phenolic molecules to protect against invading pathogens. In plant-microorganism relationships, phenolics bind to surface oligosaccharides, inactivating microorganism activities. Inspired by phenol-saccharide interactions in plant defense systems, we designed an adhesive sealant. By screening 16 different saccharides, the O-acetyl group, rich in glucomannan (GM), exhibited rapid, robust binding with the galloyl moiety of a model phenolic molecule, tannic acid (TA). Furthermore, the interaction showed both pH and temperature (upper critical solution temperature) sensitivities. Utilizing O-acetyl-galloyl interactions, materials of all dimensions from beads (0D) to strings (1D), films (2D), and objects (3D) could be prepared, as a suitable platform for printing techniques. GMTA films are elastic, adhesive, water-resistant, and effectively sealed perforations, as demonstrated by (1) a lung incision followed by an air inflation model and (2) a thoracic diaphragm model. STATEMENT OF SIGNIFICANCE: In nature, phenolic molecules are 'nearly always' physically bound with polysaccharides, indicating that the phenolics widen the functions of polysaccharides. An example includes that phenolic-polysaccharide interactions are key defense mechanisms against microbial infection in plants whereas polysaccharide alone functions poorly. Despite the ubiquitous biochemistry of polysaccharide-phenolic interactions, efforts on understanding binding chemistry focusing on phenol/polysaccharide interactions is little. This study is important because we found for the first time that O-acetyl group is the moiety in polysaccharides to which phenolic cis-diol and/or cis-triol is spontaneously bound. The phenol-polysaccharide interaction is non-covalent yet robust, kinetically fast, and reversible. Inspired by the interaction chemistry, a simple mixture of phenolic molecules and O-acetyl group containing polysaccharides such as glucomannan opens a promising fabrication strategy toward functional polysaccharide-based material.
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Affiliation(s)
- Jeehee Lee
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Eunsook Park
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Kyueui Lee
- Department of Chemistry and Green-Nano Materials Research Center, Kyungpook National University, Daegu 41666, Republic of Korea
| | - Mikyung Shin
- Department of Biomedical Engineering, Sungkyunkwan University (SKKU) Suwon 16419, Republic of Korea; Department of Intelligent Precision Healthcare Convergence, Sungkyunkwan University (SKKU), Suwon 16419, Republic of Korea
| | - Soohyeon Lee
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea
| | - Miguel Ángel Moreno-Villaécija
- Catalan Institute of Nanoscience and Nanotechnology (ICN2), CSIC and BIST, Campus UAB, Bellaterra, Barcelona 08193, Spain
| | - Haeshin Lee
- Department of Chemistry, Korea Advanced Institute of Science and Technology (KAIST), Daejeon 34141, Republic of Korea.
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20
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Ni Y, Wang J, Wang M, Liu L, Nie H, Wang Q, Sun J, Yue T, Zhu MQ, Wang J. COVID-19-inspired "artificial virus" to combat drug-resistant bacteria by membrane-intercalation- photothermal-photodynamic multistage effects. Chem Eng J 2022; 446:137322. [PMID: 35663505 PMCID: PMC9153178 DOI: 10.1016/j.cej.2022.137322] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/22/2022] [Revised: 05/02/2022] [Accepted: 05/30/2022] [Indexed: 05/14/2023]
Abstract
COVID-19 threatens human life because of the super destructiveness produced from its coronal morphology and strong transmembrane infection based on spike glycoprotein. Inspired by the coronal morphology of COVID-19 and its means of infecting, we designed an "artificial virus" with coronal morphology based on the concept of "defeating superbacteria with superviruses" by self-assembling a transacting activator of transduction peptide with triple-shell porous graphitic carbon nitride (g-C3N4) embedded with cobalt nanoparticles to forcefully infect methicillin-resistant Staphylococcus aureus (MRSA). The results confirmed that this "artificial virus" had unique properties of crossing the bacterial cell membrane barrier, heating the internal bacterial microenvironment and triggering ROS outbreak, based on its coronal morphology, membrane penetration, temperature-rising and heat insulation, oxidase-like activity and excellent visible-light harvesting properties. It had a high sterilization efficiency of 99.99% at 20 min, which was 18.6 times that of g-C3N4, and the efficiency remained at 99.99% after 3 rounds of recycling and reuse. Additionally, it can rapidly inactivate bacteria in river water and accelerate wound healing.
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Affiliation(s)
- Yongsheng Ni
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Jingyao Wang
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Mengyi Wang
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Lizhi Liu
- Department of Applied Physics, University of Eastern Finland, 70210 Kuopio, Finland
| | - Hongqing Nie
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Qiaoling Wang
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Jing Sun
- Qinghai Provincial Key Laboratory of Qinghai-Tibet Plateau Biological Resources, Northwest Institute of Plateau Biology, Chinese Academy of Sciences, Qinghai 810008, China
| | - Tianli Yue
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, China
| | - Ming-Qiang Zhu
- College of Mechanical and Electronic Engineering, Northwest A&F University, Yangling 712100, China
| | - Jianlong Wang
- College of Food Science and Engineering, Northwest A&F University, Yangling 712100, Shaanxi, China
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21
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Jiang Y, Wang J, Zhang H, Chen G, Zhao Y. Bio-inspired natural platelet hydrogels for wound healing. Sci Bull (Beijing) 2022; 67:1776-1784. [PMID: 36546063 DOI: 10.1016/j.scib.2022.07.032] [Citation(s) in RCA: 16] [Impact Index Per Article: 8.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2022] [Revised: 07/23/2022] [Accepted: 07/25/2022] [Indexed: 01/07/2023]
Abstract
Wound healing has invariably been a fundamental health concern, demanding manpower and materials and causing financial burdens. In this research, inspired by the hemostatic function of platelets, we proposed a novel bionic hydrogel by covalent amidation crosslinking natural platelet and alginate for wound healing. With the natural functional groups, the platelet-derived hydrogel exhibited outstanding biocompatibility and blood compatibility. By changing the addition ratio of platelets to alginates, the mechanical properties of the achieved hydrogel were variable to cater to different wound environments. Furthermore, silver nanoparticles could be loaded into the void space of the hydrogel which endowed the composites with superior anti-infective properties. We have demonstrated that the bio-inspired platelet hydrogel could promote hemostasis of acute tissue damage, prevent bacterial proliferation, and promote angiogenesis, collagen deposition, and granulation tissue formation in wound healing. These features signify the potential values of the bio-inspired platelet hydrogel in clinical applications.
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Affiliation(s)
- Yuanyuan Jiang
- Children's Hospital of Nanjing Medical University, Nanjing 210008, China
| | - Jie Wang
- College of Artificial Intelligence, Nanjing Agricultural University, Nanjing 210031, China
| | - Hui Zhang
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
| | - Guopu Chen
- Department of Rheumatology and Immunology, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing University, Nanjing 210096, China
| | - Yuanjin Zhao
- Department of Rheumatology and Immunology, Nanjing Drum Tower Hospital, The Affiliated Hospital of Nanjing University Medical School, Nanjing University, Nanjing 210096, China; Children's Hospital of Nanjing Medical University, Nanjing 210008, China; State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China.
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22
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Jiang S, Diao Y, Yang H. Recent advances of bio-inspired anti-icing surfaces. Adv Colloid Interface Sci 2022; 308:102756. [PMID: 36007284 DOI: 10.1016/j.cis.2022.102756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2022] [Revised: 07/16/2022] [Accepted: 08/11/2022] [Indexed: 11/25/2022]
Abstract
The need for improved anti-icing surfaces is the demand of the time and closely related to many important aspects of our lives as surface icing threatens not only industrial production but also human safety. Freezing on a cold surface is usually a heterogeneous nucleation process induced by the substrate. Creating an anti-icing surface is mainly achieved by changing surface morphology and chemistry to regulate the interaction between the surface and the water/ice to inhibit freezing on the surface. In this paper, recent research progress in the creation of biomimetic anti-icing surfaces is reviewed. Firstly, basic strategies of bionic anti-icing are introduced, and then bionic anti-icing surface strategies are reviewed according to four aspects: the process of ice formation, including condensate self-removing, inhibiting ice nucleation, reducing ice adhesion, and melting accumulated ice on the surface. The remaining challenges and the direction of future development of biomimetic anti-icing surfaces are also discussed.
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Affiliation(s)
- Shanshan Jiang
- School of Materials Science and Engineering, Zhengzhou University, 450001 Zhengzhou, Henan, China
| | - Yunhe Diao
- School of Materials Science and Engineering, Zhengzhou University, 450001 Zhengzhou, Henan, China
| | - Huige Yang
- School of Materials Science and Engineering, Zhengzhou University, 450001 Zhengzhou, Henan, China.
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Ling X, Wang K, Zhang W, Wu Y, Jin Q, Zhang D. Bio-inspired, bimetal ZIF-derived hollow carbon/MXene microstructure aim for superior microwave absorption. J Colloid Interface Sci 2022; 625:317-327. [PMID: 35724460 DOI: 10.1016/j.jcis.2022.06.011] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/12/2022] [Revised: 06/01/2022] [Accepted: 06/04/2022] [Indexed: 10/31/2022]
Abstract
Electromagnetic pollution has become an increasingly important problem which has drawbacks to both the accurate operation of the electronic facilities and the safety of human beings. To alleviate and eliminate electromagnetic irradiation, it is inevitable to design microwave absorption materials with desirable absorption intensity and broad effective frequency bandwidth. The combination of carbon-based materials and magnetic materials is an adoptable strategy to perform remarkable microwave absorption performance, while the microstructure should not be ignored. Inspired by the electromagnetic response behaviors of the microstructure from the leafhopper, the hetero-microstructure with hollow void is constructed by adopting bimetal ZIF as the precursor, followed by an interfacial tailoring strategy through electrostatic assembling and calcinating process, which enhances the microwave absorption performance by integrating the merits between the components and the micro-structure. The minimum value of reflection loss achieved -76.40 dB at 7.50 GHz under filler loading of 20% with the thickness of 2.92 mm. Besides, the effective absorption bandwidth could be tailored from 3.55 to 18 GHz among different thicknesses as required. The bio-inspired strategy is validated as a promising method, exhibiting great potential in the designing of the next-generation microwave absorber.
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Affiliation(s)
- Xin Ling
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, PR China
| | - Kaifeng Wang
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, PR China
| | - Wang Zhang
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, PR China.
| | - Yu Wu
- Research Institute of Chemical Defense, Academy of Military Sciences PLA China, Beijing 102205, PR China.
| | - Qingjun Jin
- Research Institute of Chemical Defense, Academy of Military Sciences PLA China, Beijing 102205, PR China
| | - Di Zhang
- State Key Laboratory of Metal Matrix Composites, School of Materials Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, PR China
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Sunagawa J, Yamaguchi R, Nakaoka S. Evolving neural networks through bio-inspired parent selection in dynamic environments. Biosystems 2022; 218:104686. [PMID: 35525435 DOI: 10.1016/j.biosystems.2022.104686] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/29/2021] [Revised: 03/29/2022] [Accepted: 04/25/2022] [Indexed: 11/26/2022]
Abstract
Environmental variability often degrades the performance of algorithms designed to capture the global convergence of a given search space. Several approaches have been developed to challenge environmental uncertainty by incorporating biologically inspired notions, focusing on crossover, mutation, and selection. This study proposes a bio-inspired approach called NEAT-HD, which focuses on parent selection based on genetic similarity. The originality of the proposed approach rests on its use of a sigmoid function to accelerate species formation and contribute to population diversity. Experiments on two classic control tasks were performed to demonstrate the performance of the proposed method. The results show that NEAT-HD can dynamically adapt to its environment by forming hybrid individuals originating from genetically distinct parents. Additionally, an increase in diversity within the population was observed due to the formation of hybrids and novel individuals, which has never been observed before. Comparing two tasks, the characteristics of NEAT-HD were improved by appropriately setting the algorithm to include the distribution of genetic distance within the population. Our key finding is the inherent potential of newly formed individuals for robustness against dynamic environments.
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Affiliation(s)
- Junya Sunagawa
- Department of Graduate School of Life Science, Hokkaido University, Hokkaido, Japan.
| | - Ryo Yamaguchi
- Department of Advanced Transdisciplinary Science, Hokkaido University, Hokkaido, Japan.
| | - Shinji Nakaoka
- Department of Advanced Transdisciplinary Science, Hokkaido University, Hokkaido, Japan.
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Wang Y, Zhang Z, Chen H, Zhang H, Zhang H, Zhao Y. Bio-inspired shape-memory structural color hydrogel film. Sci Bull (Beijing) 2022; 67:512-519. [PMID: 36546172 DOI: 10.1016/j.scib.2021.10.010] [Citation(s) in RCA: 21] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/12/2021] [Revised: 09/12/2021] [Accepted: 10/08/2021] [Indexed: 01/06/2023]
Abstract
Structural colors, derived from existing natural creatures, have aroused widespread attention in the materials regulation for different applications. Here, inspired by the color adjusting mechanism of hummingbird, we present a novel shape-memory structural color hydrogel film by introducing shape memory polymers (SMPs) into synthetic inverse opal scaffold structure. The excellent flexibility as well as the inverse opal structure of the hydrogel films imparts them with stable stretchability and brilliant structural colors. Benefiting from the transient structural anisotropy of copolymers, the hybrid films are possessed with shape-morphing behaviors capability. Based on the shape transformations and color responsiveness performance, we have demonstrated diverse structural color actuators with complex shapes for different tasks. Notably, as the photothermal responsive graphene quantum dots were integrated into the hydrogel, the hybrid films could also be endowed with the feature of light-controlled reversible deformation with synchronous structural color variation. These features demonstrate that the presented shape-memory structural color hydrogel film is valuable for soft robotics with multi-functions of sensing, communication and disguise.
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Affiliation(s)
- Yu Wang
- Department of Clinical Laboratory, Institute of Translational Medicine, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing 210008, China; State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
| | - Zhuohao Zhang
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
| | - Hanxu Chen
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
| | - Han Zhang
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
| | - Hui Zhang
- State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China
| | - Yuanjin Zhao
- Department of Clinical Laboratory, Institute of Translational Medicine, The Affiliated Drum Tower Hospital of Nanjing University Medical School, Nanjing 210008, China; State Key Laboratory of Bioelectronics, School of Biological Science and Medical Engineering, Southeast University, Nanjing 210096, China; Chemistry and Biomedicine Innovation Center, Nanjing University, Nanjing 210023, China.
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Bahamonde Soria R, Chinchin BD, Arboleda D, Zhao Y, Bonilla P, Van der Bruggen B, Luis P. Effect of the bio-inspired modification of low-cost membranes with TiO 2:ZnO as microbial fuel cell membranes. Chemosphere 2022; 291:132840. [PMID: 34780732 DOI: 10.1016/j.chemosphere.2021.132840] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Revised: 10/25/2021] [Accepted: 11/07/2021] [Indexed: 06/13/2023]
Abstract
Microbial fuel cells (MFCs) are a novel technique for converting biodegradable materials into electricity. In this study, the efficiency of mixed crystal (TiO2:ZnO) as a membrane modifier of a low-cost, antifouling and self-cleaning cation exchange membrane for MFCs was studied. The modification was prepared using polydopamine (PDA) as the bio-inspired glue, followed by gravity deposition of a mixture of catalyst nanoparticles (TiO2:ZnO 0.03%, 1:1 ratio) as anti-biofouling agents. The effects of the membrane modification were evaluated in terms of power density, open circuit potential, coulombic efficiency, anti-biofouling properties and also color and COD removal efficiency. The results showed that the use of the PDA-modified membrane and a mixture of catalysts facilitated the transfer of cations released during the oxidation process in the anodic compartment of the MFC, which increased the power generation in the MFC by 2.5 times and 5.7 times the current compared to pristine and PDA pristine membranes, decreased the MFC operating cycle time from 5 to 3 days, doubled the lifetime of the membranes and demonstrated higher COD removal efficiency and color removal. Finally, SEM and AFM analysis showed that the modification significantly minimized surface fouling. The modified membranes in this study proved to be a potential alternative to the expensive membranes currently used in MFCs, furthermore, this modification could be an interesting alternative modification for other potential membranes for use in MFCs, due to the fact that the catalyst activation was only performed with visible light (artificial and solar), which could decrease operating costs.
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Affiliation(s)
- Raúl Bahamonde Soria
- Renewable Energy Laboratory, Chemical Sciences Faculty, Universidad Central Del Ecuador, Ecuador; Materials & Process Engineering (IMAP), UCLouvain, Place Sainte Barbe 2, 1348, Louvain-la-Neuve, Belgium.
| | - Billy Daniel Chinchin
- Renewable Energy Laboratory, Chemical Sciences Faculty, Universidad Central Del Ecuador, Ecuador
| | - Daniel Arboleda
- Renewable Energy Laboratory, Chemical Sciences Faculty, Universidad Central Del Ecuador, Ecuador
| | - Yan Zhao
- Department of Chemical Engineering, KU Leuven, Celestijnenlaan 200F, B-3001, Leuven, Belgium
| | - Pablo Bonilla
- Nanotechnology Laboratory, Chemical Sciences Faculty, Universidad Central Del, Ecuador
| | - Bart Van der Bruggen
- Department of Chemical Engineering, KU Leuven, Celestijnenlaan 200F, B-3001, Leuven, Belgium
| | - Patricia Luis
- Materials & Process Engineering (IMAP), UCLouvain, Place Sainte Barbe 2, 1348, Louvain-la-Neuve, Belgium
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Tian Y, Sun DW, Zhu Z. Development of natural deep eutectic solvents (NADESs) as anti-freezing agents for the frozen food industry: Water-tailoring effects, anti-freezing mechanisms and applications. Food Chem 2022; 371:131150. [PMID: 34808761 DOI: 10.1016/j.foodchem.2021.131150] [Citation(s) in RCA: 20] [Impact Index Per Article: 10.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2021] [Revised: 09/10/2021] [Accepted: 09/13/2021] [Indexed: 02/08/2023]
Abstract
Nature-inspired natural deep eutectic solvents (NADESs) as anti-freezing agents including Pro:Glc (5:3), Pro:Glc (1:1), Pro:Sor (1:1), and Urea:Glc:CaCl2 (3:6:1) were prepared. Viscosity (η), conductivity (σ), activation energy of viscous flow (Eη) and conduction (Eᴧ), transverse relaxation time (T2), thermal behaviours, and anti-freezing capacities of the NADESs were investigated. A critical T2 of 24.60 ms for η changes was obtained, and the relationship between η and T2 was determined as lnη = -1.398lnT2 + 10.688. Differentialscanningcalorimetry and low-field nuclear magnetic resonance analyses indicated NADESs could hinder the molecular motion as temperature decreased through enhancing the hydrogen-bonding strength, endowing them with excellent anti-freezing capacity. NADESs showed varied Eη (41.58 ∼ 45.72 kJ mol-1) and Eᴧ (48.31 ∼ 63.08 kJ mol-1), of which Pro:Sor (1:1) possessed the greatest ones, showing its greatest temperature sensitivity and best anti-frosting capacity. Applications in frozen chicken breast further announced the potentials of NADESs as anti-freezing agents for the industry.
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Kim W, Park J, Kim W, Jo S, Kim M, Kim C, Park H, Bang D, Lee W, Park J. Bio-inspired Ag nanovilli-based sandwich-type SERS aptasensor for ultrasensitive and selective detection of 25-hydroxy vitamin D 3. Biosens Bioelectron 2021; 188:113341. [PMID: 34044348 DOI: 10.1016/j.bios.2021.113341] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2021] [Revised: 04/30/2021] [Accepted: 05/10/2021] [Indexed: 01/02/2023]
Abstract
Vitamin D has been identified as an essential biomarker for various diseases such as rheumatoid arthritis, cancer, and cardiovascular diseases. Recently, many reports have demonstrated a potential link between vitamin D and systemic infections, including coronavirus disease 2019. The villi of the small intestine increase the surface area of the intestinal walls, demonstrating exceptionally efficient absorption of nutrients in the lumen and adding digestive secretions. In this study, based on the villi structure, we developed a bio-inspired silver nanovilli-based sandwich-type surface enhanced Raman scattering aptasensor for the ultrasensitive and selective detection of 25-hydroxy vitamin D3. The densely packed nanovilli structure enhanced the Raman signal, forming hotspots owing to its large surface area. Using experiments and electromagnetic simulations, we optimized the nanovilli structure as a SERS sensor. The sandwich-type aptasensor was designed using an aptamer and 4-Phenyl-1,2,4-triazoline-3,5-dione-methylene blue complex. The nanovilli-based aptasensor could sensitively detect various concentrations of 25-hydroxy vitamin D3, ranging from those found in deficient to excess conditions. The detection limit of the nanovilli-based sandwich-type aptasensor for 25-hydroxy vitamin D3 was 0.001 ng/mL, which is much lower than the deficiency concentration, and was detectable even in the human serum. In addition, our proposed sensor exhibited good repeatability (17.76%) and reproducibility (7.47%). Moreover, the nanovilli-based sandwich-type SERS aptasensor could selectively distinguish 25-hydroxy vitamin D3 from other vitamins. The silver nanovilli-based sandwich-type surface enhanced Raman scattering aptasensor opens a new avenue for the development of a bio-inspired vitamin-sensing platform.
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Affiliation(s)
- Woochang Kim
- Department of Control and Instrumentation Engineering, Korea University, Sejong, 30019, South Korea
| | - Joohyung Park
- Department of Control and Instrumentation Engineering, Korea University, Sejong, 30019, South Korea
| | - Woong Kim
- Department of Control and Instrumentation Engineering, Korea University, Sejong, 30019, South Korea
| | - Seongjae Jo
- Department of Control and Instrumentation Engineering, Korea University, Sejong, 30019, South Korea; Infectious Disease Research Center, Korea Research Institute of Bioscience and Biotechnology (KRIBB), Daejeon, 34141, South Korea
| | - Minwoo Kim
- Department of Control and Instrumentation Engineering, Korea University, Sejong, 30019, South Korea
| | - Chihyun Kim
- Department of Control and Instrumentation Engineering, Korea University, Sejong, 30019, South Korea
| | - Hyunjun Park
- Department of Control and Instrumentation Engineering, Korea University, Sejong, 30019, South Korea
| | - Doyeon Bang
- College of AI Convergence, Chonnam National University, Gwangju, 61186, South Korea; Korea Institute of Medical Microrobotics, Gwangju, 61011, South Korea
| | - Wonseok Lee
- Department of Control and Instrumentation Engineering, Korea University, Sejong, 30019, South Korea; Department of Electrical Engineering, Korea National University of Transportation, Chungju, 27469, South Korea.
| | - Jinsung Park
- Department of Control and Instrumentation Engineering, Korea University, Sejong, 30019, South Korea.
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Abstract
The development in nanobiotechnology provides an in-depth understanding of cell-surface interactions at the nanoscale level. Particularly, several surface features have shown the ability to interrogate the bacterial behavior and fate. In the past decade, the mechanical and physical sterilization has attracted considerable attention, as paradigms of such do not rely on chemical substances to damage or kill bacteria, whereas it is associated with natural living organisms or synthetic materials. Of note, such antibacterial scenario does not cause bacterial resistance, as the morphology of nanometer can directly cause bacterial death through physical and mechanical interactions. In this review, we provide an overview of recently developed technologies of leveraging topographical nanofeatures for physical sterilization. We mainly discuss the development of various morphologic nanostructures, and colloidal nanostructures show casing the capacity of "mechanical sterilization." Mechanically sterilized nanostructures can penetrate or cut through bacterial membranes. In addition, surface morphology, such as mechanical bactericidal nanoparticles and nanoneedles, can cause damage to the membrane of microorganisms, leading to cell lysis and death. Although the research in the field of mechanical sterilization is still in infancy, the effect of these nanostructure morphologies on sterilization has shown remarkable antibacterial potential, which could provide a new toolkit for anti-infection and antifouling applications. The mechanical and physical sterilization has attracted considerable attention, as paradigms of such do not rely on chemical substances to damage or kill bacteria. Moreover, such antibacterial scenario does not cause bacterial resistance, as the morphology of nanometer can directly cause bacterial death through physical and mechanical interactions. In this review, we focus on the advanced development of various morphologic nanostructures and colloidal nanostructures that show the capacity of "mechanical sterilization."
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Affiliation(s)
- Yujie Cai
- School of Chemistry and Life Science, Changchun University of Technology, 2055 Yanan Street, 130012, Changchun, People's Republic of China.,Advanced Institute of Materials Science, Changchun University of Technology, 2055 Yanan Street, 130012, Changchun, People's Republic of China
| | - Wei Bing
- School of Chemistry and Life Science, Changchun University of Technology, 2055 Yanan Street, 130012, Changchun, People's Republic of China. .,Advanced Institute of Materials Science, Changchun University of Technology, 2055 Yanan Street, 130012, Changchun, People's Republic of China.
| | - Xiao Xu
- Institute of Food Safety and Environment Monitoring, College of Chemistry, Fuzhou University, 350108, Fuzhou, People's Republic of China
| | - Yuqi Zhang
- College of Pharmaceutical Sciences, Zhejiang University, 310058, Hangzhou, People's Republic of China
| | - Zhaowei Chen
- Institute of Food Safety and Environment Monitoring, College of Chemistry, Fuzhou University, 350108, Fuzhou, People's Republic of China
| | - Zhen Gu
- College of Pharmaceutical Sciences, Zhejiang University, 310058, Hangzhou, People's Republic of China.
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Abstract
Underwater robot designs inspired by the behavior and morphological characteristics of aquatic animals can provide reinforced mobility and energy efficiency. In the past two decades, the emerging materials science and integrated circuit technology have been combined and applied to various types of bionic soft underwater miniaturized robots by researchers around the world. Further, the potential applications of biomimetic soft micro-swimmers in the biological and medical fields have been explored. Here, this paper reviews the development of biomimetic soft tiny swimmers, which are designed based on a variety of intelligent materials and control strategies. This review focuses on the various actuation mechanisms of soft tiny swimmers reported in the past two decades and classifies these robots into four categories: fish-like, snake-like, jellyfish-like and microbial-inspired ones. Besides, this review considers the practical challenges faced by actuation mechanisms of each type of robot, and summarizes and prospects how these challenges affect the potential applications of robots in real environments.
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Affiliation(s)
- Shihan Fu
- School of Mechanical Engineering and Automation, Fuzhou University, Fuzhou, 350108, China
| | - Fanan Wei
- School of Mechanical Engineering and Automation, Fuzhou University, Fuzhou, 350108, China.
| | - Chao Yin
- School of Mechanical Engineering and Automation, Fuzhou University, Fuzhou, 350108, China
| | - Ligang Yao
- School of Mechanical Engineering and Automation, Fuzhou University, Fuzhou, 350108, China
| | - Yaxiong Wang
- School of Mechanical Engineering and Automation, Fuzhou University, Fuzhou, 350108, China
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Kang X, Cheng Y, Wen Y, Qi J, Li X. Bio-inspired co-deposited preparation of GO composite loose nanofiltration membrane for dye contaminated wastewater sustainable treatment. J Hazard Mater 2020; 400:123121. [PMID: 32569981 DOI: 10.1016/j.jhazmat.2020.123121] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/02/2020] [Revised: 05/20/2020] [Accepted: 06/01/2020] [Indexed: 06/11/2023]
Abstract
The fully separation of dye/salt through loose nanofiltration membranes is of great significance for the sustainable development paradigm of textile wastewater. However, the current loose nanofiltration membranes suffer low separation efficiency and complex preparation. Herein, by one-step co-deposition, we develop graphene oxide (GO) composite loose nanofiltration membranes with low negatively charged surface. Our membrane possesses unconventional high pure water permeation of 71.7 LMH/bar, 92.9 % rejection for Methyl blue (MB) and 98.8 % rejection for Congo red (CR). Benefiting from the large interlayer distance of GO nanosheets and low negatively charged surface, membrane achieves high dyes/salts separation with satisfactory permeation to salts (94.3 % of Na2SO4, 97.6 % of MgSO4, 98.3 % of MgCl2 and 99.0 % of NaCl). The CR/salt mixed solutions exhibit similar removal rates to their constituents' single dye or salt solutions (CR rejection is up to more than 97 % and the permeations of all salts are above 93 %). At the same time, binary dyes mixtures (Congo red and Methyl orange) can also be effectively separated. Furthermore, the membrane shows a relatively desirable antifouling property. The flux recovery still remains at 85.9 % after three cycling filtrations. This study provides a facile approach to prepare highly-efficient loose nanofiltration membranes for wastewater sustainable remediation.
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Affiliation(s)
- Xu Kang
- School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Yuanyuan Cheng
- School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Yan Wen
- School of Environment, Harbin Institute of Technology, Harbin 150090, China
| | - Jingyao Qi
- School of Environment, Harbin Institute of Technology, Harbin 150090, China.
| | - Xin Li
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, State Key Lab of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150001, China.
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Tung CC, Wang HJ, Chen PY. Lightweight, compression-resistant cellular structures inspired from the infructescence of Liquidambar formosana. J Mech Behav Biomed Mater 2020; 110:103961. [PMID: 32957252 DOI: 10.1016/j.jmbbm.2020.103961] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2020] [Revised: 04/20/2020] [Accepted: 06/28/2020] [Indexed: 11/25/2022]
Abstract
In order to adapt to the environment, plants have evolved many structural designs to improve material utilization. The head infructescence can be described as the Fibonacci sequence, in consistent with plant developmental biology. The lignified framework inside the head infructescence possesses idiographic structural designs that optimize maximum energy efficiency, growing space, seed spreading probability, and enhance the mechanical behavior of the infructescences. In this study, the hierarchical structure and mechanical properties of the infructescence of Liquidambar formosana, commonly called Formosan gum, were investigated. Liquidambar formosana has maple-like leaves and burr-like infructescences. The buckyball-like framework inside infructescence consists of chambers (cells), which support the whole structure under compression. Inspired by the framework, we proposed three models: Thomson model based on the lowest potential energy state, Poisson disc model indicated random distribution, and spherical Fibonacci model represented plant development. Three-dimensional physical entities of these models were fabricated by additive manufacturing. We discovered that under compression testing, these models appear different mechanical properties and deformation mechanisms based on their structures. Spherical Fibonacci model provides superior mechanical properties compared to Thomson and Poisson disc models due to its unique structural design. It is the first time that spherical Fibonacci model brought into the bio-inspired mechanics models through structural analysis and finite element method. The unique construction of Liquidambar formosana has great potential in the designs of novel lightweight, anti-buckling composites, and bio-inspired architectures.
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Affiliation(s)
- Cheng-Che Tung
- Department of Materials Science and Engineering, National Tsing Hua University, 101 Kuang-Fu Rd, Sec. 2, Hsinchu, 30013, Taiwan, R.O.C
| | - Hsin-Jui Wang
- Department of Materials Science and Engineering, National Tsing Hua University, 101 Kuang-Fu Rd, Sec. 2, Hsinchu, 30013, Taiwan, R.O.C; National Synchrotron Radiation Research Center, 101 Hsin-Ann Road, Hsinchu Science Park, Hsinchu, 30076, Taiwan, R.O.C
| | - Po-Yu Chen
- Department of Materials Science and Engineering, National Tsing Hua University, 101 Kuang-Fu Rd, Sec. 2, Hsinchu, 30013, Taiwan, R.O.C.
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Zhao X, Karthik N, Xiong D, Liu Y. Bio-inspired surface modification of PEEK through the dual cross-linked hydrogel layers. J Mech Behav Biomed Mater 2020; 112:104032. [PMID: 32861065 DOI: 10.1016/j.jmbbm.2020.104032] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/05/2019] [Revised: 04/04/2020] [Accepted: 08/08/2020] [Indexed: 11/26/2022]
Abstract
The biocompatible high-performance material PEEK (polyetheretherketone) is an attractive implant material, however, its hydrophobicity and high friction coefficients severely hinder its biomedical applications. Thus, it is inferred from the recent advances in surface modification technology, achieving the biomimetic natural joint lubrication systems on PEEK still remains a challenge. In view of the above, herein we proposed a novel two-step strategy to fabricate a "soft (dual cross-linked hydrogel) layer-hard (PEEK) substrate" texture that mimics the structure and function of soft cartilage on the hard basal bone in joints. At first, a layer of acrylic acid-co-acryl amide (AA-AM) hydrogel is anchored to the PEEK substrate through UV-initiated polymerization. In the second step, hydrogel coated PEEK substrate is immersed in ferric nitrate solution to create the secondary cross-linkage between Fe3+ and -COOH groups in the hydrogel. As a result, the consequential top-coat hydrogel layer not only transforms the surface wettability (hydrophobic to hydrophilic) but also provides scratch resistance to the underlying PEEK substrate. The modified specimens display low friction coefficients in water under different load conditions. In addition, the obtained surface exhibits a certain self-repairing ability due to its unique physically reversible network structure. Therefore, this work provides a promising strategy for broadening the use of PEEK in orthopedic implants.
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Affiliation(s)
- Xiaoduo Zhao
- School of Materials Science and Engineering, Nanjing University of Science and Technology, 210094, Nanjing, China; Jiangsu Key Laboratory of Advanced Micro/Nano Materials and Technology, 210094, Nanjing, China
| | - Namachivayam Karthik
- School of Materials Science and Engineering, Nanjing University of Science and Technology, 210094, Nanjing, China; Jiangsu Key Laboratory of Advanced Micro/Nano Materials and Technology, 210094, Nanjing, China
| | - Dangsheng Xiong
- School of Materials Science and Engineering, Nanjing University of Science and Technology, 210094, Nanjing, China; Jiangsu Key Laboratory of Advanced Micro/Nano Materials and Technology, 210094, Nanjing, China.
| | - Yuntong Liu
- School of Materials Science and Engineering, Nanjing University of Science and Technology, 210094, Nanjing, China; Jiangsu Key Laboratory of Advanced Micro/Nano Materials and Technology, 210094, Nanjing, China
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Abolade JO, Konditi DBO, Dharmadhikary VM. Bio-inspired wideband antenna for wireless applications based on perturbation technique. Heliyon 2020; 6:e04282. [PMID: 32671246 PMCID: PMC7339065 DOI: 10.1016/j.heliyon.2020.e04282] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/14/2020] [Revised: 06/10/2020] [Accepted: 06/19/2020] [Indexed: 11/20/2022] Open
Abstract
The evolution of advancement in communication technologies and ever-increasing demand by users for compact communication devices has necessitated a shift in the design approach to achieve antenna structures that are compact and robust. Owing to the diverse communication requirements, antenna systems operating across wide bands have become a necessity. An antenna that is capable of working effectively in several bands is called wideband antenna. In this work, a bio-inspired microstrip antenna (Bi-MPA) for wideband application is proposed and simulated. The radiating patch of the proposed Bi-MPA is the shape of Carica Papaya leaf. The structure was realized through the perturbation of the circular shape patch. The proposed antenna has an impedance bandwidth of 4.3 GHz (1.9 GHz–6.2 GHz) at a return loss of 10 dB while it exhibits a narrow band at 7.2 GHz (6.99–7.44 GHz) and 9.3 GHz (9.15–9.35 GHz) bands. The gain of the proposed antenna is between 2.60 dB and 10.22 dB and the radiation pattern is quasi-omnidirectional. The proposed Bi-MPA is compact and suitable for global system for mobile communication (GSM1900), Universal Mobile Telecommunication System (UMTS), Wireless Local Area Network (WLAN), Long Term Evolution (LTE2300 and LTE2600), Worldwide Interoperability for Microwave Access (WiMAX), C-band, X-band, and sub6 GHz fifth-generation (5G) band. Our contribution to the scientific community in this work is that we have proposed a single antenna structure that is suitable for communication in all the bands mentioned in order to ensure compactness in the mobile devices as compared to base station antennas.
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Affiliation(s)
- Jeremiah O Abolade
- Department of Electrical Engineering, Pan African University, Institute for Basic Sciences, Technology and Innovation, Jomo Kenyatta University of Agriculture and Technology, Juja, Kenya
| | - Dominic B O Konditi
- School of Electronic and Communication Engineering, The Technical University of Kenya, Nairobi, Kenya
| | - Vasant M Dharmadhikary
- Department of Electrical and Electronic Engineering, Dedan Kimathi University of Technology, Nyeri, Kenya
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Choudhary S, Kalra V, Kumar M, Tiwary AK, Sood J, Silakari O. Bio-Inspired Strategies against Diabetes and Associated Complications: A Review. ACTA ACUST UNITED AC 2019; 13:273-282. [PMID: 31884934 DOI: 10.2174/1872211314666191224120145] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2019] [Revised: 12/13/2019] [Accepted: 12/16/2019] [Indexed: 01/22/2023]
Abstract
Bio-molecules are the most important target to be considered while designing any drug delivery system. The logic lies in using such bio-sensing or bio-mimicking systems in their formulations that can mimic the active site of those receptors to which the drug is going to bind. Polymers mimicking the active site of target enzymes are regarded as bio-inspired polymers and can be used to ameliorate many diseased conditions. Nowadays, this strategy is also being adopted against diabetes and its complications. Under hyperglycemic conditions, many pathways get activated which are responsible for the progression of diabetes-associated secondary complications viz. retinopathy, neuropathy, and nephropathy. The enzymes involved in the progression of these complications can be mimicked for their effective management. For an instance, Aldose Reductase (ALR2), a rate-limiting enzyme of the polyol pathway (downstream pathway) which gets over-activated under hyperglycemic condition is reported to be mimicked by using polymers which are having same functionalities in their structure. This review aims at critically appraising reports in which target mimicking bio-inspired formulations have been envisaged against diabetes and its complications. The information summarized in this review will provide an idea about the bio-sensing approaches utilized to manage blood glucose level and the utility of bio-inspired polymers for the management of diabetic complications (DC). Such type of information may be beneficial to pharmaceutical companies and academia for better development of targeted drug delivery systems with sustained-release property against these diseased conditions.
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Affiliation(s)
- Shalki Choudhary
- Department of Pharmaceutical Sciences and Drug Research, Punjabi University, Patiala, Punjab, 147002, India
| | - Vinni Kalra
- Department of Pharmaceutical Sciences and Drug Research, Punjabi University, Patiala, Punjab, 147002, India
| | - Manoj Kumar
- Department of Pharmaceutical Sciences and Drug Research, Punjabi University, Patiala, Punjab, 147002, India
| | - Ashok Kumar Tiwary
- Department of Pharmaceutical Sciences and Drug Research, Punjabi University, Patiala, Punjab, 147002, India
| | - Jatin Sood
- Formulation Research and Development Department, Peace Naturals Project Inc. The Cronos Group, Stayner, Ontario, Canada
| | - Om Silakari
- Department of Pharmaceutical Sciences and Drug Research, Punjabi University, Patiala, Punjab, 147002, India
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Massoumi B, Abbasian M, Jahanban-Esfahlan R, Mohammad-Rezaei R, Khalilzadeh B, Samadian H, Rezaei A, Derakhshankhah H, Jaymand M. A novel bio-inspired conductive, biocompatible, and adhesive terpolymer based on polyaniline, polydopamine, and polylactide as scaffolding biomaterial for tissue engineering application. Int J Biol Macromol 2019; 147:1174-1184. [PMID: 31751704 DOI: 10.1016/j.ijbiomac.2019.10.086] [Citation(s) in RCA: 38] [Impact Index Per Article: 7.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Revised: 10/06/2019] [Accepted: 10/08/2019] [Indexed: 01/01/2023]
Abstract
A novel electrically conductive nanofibrous scaffold based on polyaniline-co-(polydopamine-grafted-poly(d,l-lactide)) [PANI-co-(PDA-g-PLA)] was fabricated using electrospinning technique and its physicochemical as well as biological characteristics toward bone tissue engineering (TE) were investigated extensively. In detail, PANI-co-PDA was synthesized via a one-step chemical oxidization approach. Then, d,l-lactaide monomer was grafted onto PDA segment using a ring opening polymerization (ROP) to afford PANI-co-(PDA-g-PLA) terpolymer. The successful synthesis of PANI-co-(PDA-g-PLA) terpolymer was confirmed using FTIR spectroscopy as well as TGA analysis. Finally, a solution of the synthesized terpolymer was electrospun to fabricate a conductive nanofibrous scaffold. Some physicochemical features such as mechanical, conductivity, electroactivity, hydrophobicity, and morphology as well as biological characteristics including biocompatibility, biodegradability, as well as enhancing the cells adhesion and proliferation were investigated. According to the above-mentioned experimental results, the fabricated electrospun nanofibers can be considered as a potential scaffold for TE application, mainly due to its proper physicochemical and biological properties.
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Affiliation(s)
| | | | - Rana Jahanban-Esfahlan
- Department of Medical Biotechnology, Faculty of Advanced Medical Sciences, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Rahim Mohammad-Rezaei
- Electrochemistry Research Laboratory, Faculty of Basic Sciences, Azarbaijan Shahid Madani University, Tabriz, Iran
| | - Balal Khalilzadeh
- Stem Cell Research Center, Tabriz University of Medical Sciences, Tabriz, Iran; Biosensors and Bioelectronics Research Center, Ardabil University of Medical Sciences, Ardabil, Iran
| | - Hadi Samadian
- Nano Drug Delivery Research Center, Health Technology Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Aram Rezaei
- Nano Drug Delivery Research Center, Health Technology Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Hossein Derakhshankhah
- Pharmaceutical Sciences Research Center, Health Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran
| | - Mehdi Jaymand
- Nano Drug Delivery Research Center, Health Technology Institute, Kermanshah University of Medical Sciences, Kermanshah, Iran.
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Pinzi M, Galvan S, Rodriguez Y Baena F. The Adaptive Hermite Fractal Tree (AHFT): a novel surgical 3D path planning approach with curvature and heading constraints. IEEE Robot Autom Lett 2019. [PMID: 30790172 DOI: 10.1109/lra.2016.2528292] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
PURPOSE In the context of minimally invasive neurosurgery, steerable needles such as the one developed within the Horizon2020-funded EDEN2020 project (Frasson et al. in Proc Inst Mech Eng Part H J Eng Med 224(6):775-88, 2010. https://doi.org/10.1243/09544119JEIM663 ; Secoli and y Baena in IEEE international conference on robotics and automation, 2013) aspire to address the clinical challenge of better treatment for cancer patients. The direct, precise infusion of drugs in the proximity of a tumor has been shown to enhance its effectiveness and diffusion in the surrounding tissue (Vogelbaum and Aghi in Neuro-Oncology 17(suppl 2):ii3-ii8, 2015. https://doi.org/10.1093/neuonc/nou354 ). However, planning for an appropriate insertion trajectory for needles such as the one proposed by EDEN2020 is challenging due to factors like kinematic constraints, the presence of complex anatomical structures such as brain vessels, and constraints on the required start and target poses. METHODS We propose a new parallelizable three-dimensional (3D) path planning approach called Adaptive Hermite Fractal Tree (AHFT), which is able to generate 3D obstacle-free trajectories that satisfy curvature constraints given a specified start and target pose. The AHFT combines the Adaptive Fractal Tree algorithm's efficiency (Liu et al. in IEEE Robot Autom Lett 1(2):601-608, 2016. https://doi.org/10.1109/LRA.2016.2528292 ) with optimized geometric Hermite (Yong and Cheng in Comput Aided Geom Des 21(3):281-301, 2004. https://doi.org/10.1016/j.cagd.2003.08.003 ) curves, which are able to handle heading constraints. RESULTS Simulated results demonstrate the robustness of the AHFT to perturbations of the target position and target heading. Additionally, a simulated preoperative environment, where the surgeon is able to select a desired entry pose on the patient's skull, confirms the ability of the method to generate multiple feasible trajectories for a patient-specific case. CONCLUSIONS The AHFT method can be adopted in any field of application where a 3D path planner with kinematic and heading constraints on both start and end poses is required.
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Affiliation(s)
- Marlene Pinzi
- Mechatronics in Medicine Laboratory, Department of Mechanical Engineering, Imperial College, London, UK.
| | - Stefano Galvan
- Mechatronics in Medicine Laboratory, Department of Mechanical Engineering, Imperial College, London, UK
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Pinzi M, Galvan S, Rodriguez Y Baena F. The Adaptive Hermite Fractal Tree (AHFT): a novel surgical 3D path planning approach with curvature and heading constraints. Int J Comput Assist Radiol Surg 2019; 14:659-70. [PMID: 30790172 DOI: 10.1007/s11548-019-01923-3] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Accepted: 02/08/2019] [Indexed: 11/15/2022]
Abstract
Purpose In the context of minimally invasive neurosurgery, steerable needles such as the one developed within the Horizon2020-funded EDEN2020 project (Frasson et al. in Proc Inst Mech Eng Part H J Eng Med 224(6):775–88, 2010. 10.1243/09544119JEIM663; Secoli and y Baena in IEEE international conference on robotics and automation, 2013) aspire to address the clinical challenge of better treatment for cancer patients. The direct, precise infusion of drugs in the proximity of a tumor has been shown to enhance its effectiveness and diffusion in the surrounding tissue (Vogelbaum and Aghi in Neuro-Oncology 17(suppl 2):ii3–ii8, 2015. 10.1093/neuonc/nou354). However, planning for an appropriate insertion trajectory for needles such as the one proposed by EDEN2020 is challenging due to factors like kinematic constraints, the presence of complex anatomical structures such as brain vessels, and constraints on the required start and target poses. Methods We propose a new parallelizable three-dimensional (3D) path planning approach called Adaptive Hermite Fractal Tree (AHFT), which is able to generate 3D obstacle-free trajectories that satisfy curvature constraints given a specified start and target pose. The AHFT combines the Adaptive Fractal Tree algorithm’s efficiency (Liu et al. in IEEE Robot Autom Lett 1(2):601–608, 2016. 10.1109/LRA.2016.2528292) with optimized geometric Hermite (Yong and Cheng in Comput Aided Geom Des 21(3):281–301, 2004. 10.1016/j.cagd.2003.08.003) curves, which are able to handle heading constraints. Results Simulated results demonstrate the robustness of the AHFT to perturbations of the target position and target heading. Additionally, a simulated preoperative environment, where the surgeon is able to select a desired entry pose on the patient’s skull, confirms the ability of the method to generate multiple feasible trajectories for a patient-specific case. Conclusions The AHFT method can be adopted in any field of application where a 3D path planner with kinematic and heading constraints on both start and end poses is required.
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Abstract
Female anglerfishes have a lantern-shape luminous organ sprouting from the middle of their heads to lure their prey in the dark deep sea. Inspired by the anglerfish, we designed an electromagnetic anglerfish-shaped millirobot that can receive energy and transform it into light to attract algae cells to specific locations. The small wireless powered robot can receive about 658 mW of power from external energy supply coils, and light LEDs (light-emitting diodes). The wireless power generation and moving control of the robot are analyzed systematically. Transmitting electric energy to smaller scale receivers to endow milli or micro robots with wireless power function is an interesting and promising research direction. With this function, the wireless powered robot is expected to be extensively used at the small scale in the near future, such as to provide electricity to drive microdevices (microgrippers, microsensors, etc.), provide light or heat in small-scale space, stimulate/kill pathological cells in minimally invasive treatment and so on.
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Ajithkumar KC, Pramod K. Doxorubicin-DNA adduct entrenched and motif tethered artificial virus encased in pH-responsive polypeptide complex for targeted cancer therapy. Mater Sci Eng C Mater Biol Appl 2018; 89:387-400. [PMID: 29752111 DOI: 10.1016/j.msec.2018.04.023] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/02/2017] [Revised: 04/08/2018] [Accepted: 04/11/2018] [Indexed: 10/17/2022]
Abstract
Doxorubicin is a broad spectrum anticancer antibiotic that possesses toxic effects such as cardiomyopathy, that even lead to congestive heart failure. Thus, the development of a new bio-inspired system is required, that retain the advantageous effect of doxorubicin while retarding the side effects. Hence, a system was developed that we describe 'doxorubicin-DNA adduct entrenched artificial virus encased in polypeptide complex'. The drug-DNA adduct (DDA) was prepared by a formaldehyde mediated reaction. A simple chloroform extraction method for the separation of DDA was developed. DDA was employed to self-assemble the folate tethered bovine serum albumin to form the protein coat in the proposed artificial virus. The folate tethered albumin provides an artificial virus concept, with tumor tissue targeting due to the presence of folate. The whole system was then encased in a pH-responsive polypeptide complex that dissolves in acidic pH, but not in basic pH. DDA was evaluated by UV-Vis spectrophotometry, spectrofluorimetry and high-performance liquid chromatography (HPLC). A promising drug release at physiological condition was observed from DDA. The developed system was evaluated by a developed and validated artificial cell apparatus that mimic the features of a cancer cell. The drug delivery system displayed a considerable amount of drug release within 24 h. Moreover, the developed artificial virus system reduced angiogenesis caused by tumor cells in chick chorioallantoic membrane. Histopathology of treated chicken heart slices demonstrated that the developed artificial virus system reduces the tissue deformation and apoptosis in heart tissue slices, thus providing a new approach to prevent Dox-induced cardiomyopathy.
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Affiliation(s)
- K C Ajithkumar
- College of Pharmaceutical Sciences, Govt. Medical College, Kozhikode 673008, Kerala, India
| | - K Pramod
- College of Pharmaceutical Sciences, Govt. Medical College, Kozhikode 673008, Kerala, India.
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Horsley J, Yu J, Yeoh YQ, Abell A. Peptides as Bio-inspired Molecular Electronic Materials. Adv Exp Med Biol 2017; 1030:131-53. [PMID: 29081052 DOI: 10.1007/978-3-319-66095-0_6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register]
Abstract
Understanding the electronic properties of single peptides is not only of fundamental importance to biology, but it is also pivotal to the realization of bio-inspired molecular electronic materials. Natural proteins have evolved to promote electron transfer in many crucial biological processes. However, their complex conformational nature inhibits a thorough investigation, so in order to study electron transfer in proteins, simple peptide models containing redox active moieties present as ideal candidates. Here we highlight the importance of secondary structure characteristic to proteins/peptides, and its relevance to electron transfer. The proposed mechanisms responsible for such transfer are discussed, as are details of the electrochemical techniques used to investigate their electronic properties. Several factors that have been shown to influence electron transfer in peptides are also considered. Finally, a comprehensive experimental and theoretical study demonstrates that the electron transfer kinetics of peptides can be successfully fine tuned through manipulation of chemical composition and backbone rigidity. The methods used to characterize the conformation of all peptides synthesized throughout the study are outlined, along with the various approaches used to further constrain the peptides into their geometric conformations. The aforementioned sheds light on the potential of peptides to one day play an important role in the fledgling field of molecular electronics.
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Saleiro M, Terzić K, Rodrigues JMF, du Buf JMH. BINK: Biological binary keypoint descriptor. Biosystems 2017; 162:147-156. [PMID: 29031966 DOI: 10.1016/j.biosystems.2017.10.007] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2016] [Revised: 09/28/2017] [Accepted: 10/11/2017] [Indexed: 11/26/2022]
Abstract
Learning robust keypoint descriptors has become an active research area in the past decade. Matching local features is not only important for computational applications, but may also play an important role in early biological vision for disparity and motion processing. Although there were already some floating-point descriptors like SIFT and SURF that can yield high matching rates, the need for better and faster descriptors for real-time applications and embedded devices with low computational power led to the development of binary descriptors, which are usually much faster to compute and to match. Most of these descriptors are based on purely computational methods. The few descriptors that take some inspiration from biological systems are still lagging behind in terms of performance. In this paper, we propose a new biologically inspired binary keypoint descriptor: BINK. Built on responses of cortical V1 cells, it significantly outperforms the other biologically inspired descriptors. The new descriptor can be easily integrated with a V1-based keypoint detector that we previously developed for real-time applications.
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Affiliation(s)
- Mário Saleiro
- Vision Laboratory, LARSyS, FCT & ISE, University of the Algarve, Faro, Portugal
| | - Kasim Terzić
- School of Computer Science, University of St. Andrews, Scotland, UK
| | - J M F Rodrigues
- Vision Laboratory, LARSyS, FCT & ISE, University of the Algarve, Faro, Portugal.
| | - J M H du Buf
- Vision Laboratory, LARSyS, FCT & ISE, University of the Algarve, Faro, Portugal
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Lee CJ, Jung JY, Lee JR. Bio-Inspired Distributed Transmission Power Control Considering QoS Fairness in Wireless Body Area Sensor Networks. Sensors (Basel) 2017; 17:s17102344. [PMID: 29036924 PMCID: PMC5676673 DOI: 10.3390/s17102344] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 08/24/2017] [Revised: 10/10/2017] [Accepted: 10/11/2017] [Indexed: 11/16/2022]
Abstract
Recently, the development of wireless body area sensor network (WBASN) has accelerated due to the rapid development of wireless technology. In the WBASN environment, many WBASNs coexist where communication ranges overlap with each other, resulting in the possibility of interference. Although nodes in a WBASN typically operate at a low power level, to avoid adversely affecting the human body, high transmission rates may be required to support some applications. In addition to this, since many varieties of applications exist in the WBASN environment, each prospective user may have different quality of service (QoS) requirements. Hence, the following issues should be considered in the WBASN environment: (1) interference between adjacent WBASNs, which influences the performance of a specific system, and (2) the degree of satisfaction on the QoS of each user, i.e., the required QoS such as user throughput should be considered to ensure that all users in the network are provided with a fair QoS satisfaction. Thus, in this paper, we propose a transmission power adjustment algorithm that addresses interference problems and guarantees QoS fairness between users. First, we use a new utility function to measure the degree of the satisfaction on the QoS for each user. Then, the transmission power of each sensor node is calculated using the Cucker-Smale model, and the QoS satisfaction of each user is synchronized dispersively. The results of simulations show that the proposed algorithm performs better than existing algorithms, with respect to QoS fairness and energy efficiency.
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Affiliation(s)
- Chan-Jae Lee
- School of Electrical and Electronics Engineering, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Korea.
| | - Ji-Young Jung
- School of Electrical and Electronics Engineering, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Korea.
| | - Jung-Ryun Lee
- School of Electrical and Electronics Engineering, Chung-Ang University, 84 Heukseok-ro, Dongjak-gu, Seoul 06974, Korea.
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Szczepanski CR, Guittard F, Darmanin T. Recent advances in the study and design of parahydrophobic surfaces: From natural examples to synthetic approaches. Adv Colloid Interface Sci 2017; 241:37-61. [PMID: 28132673 DOI: 10.1016/j.cis.2017.01.002] [Citation(s) in RCA: 66] [Impact Index Per Article: 9.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/01/2016] [Revised: 12/22/2016] [Accepted: 01/18/2017] [Indexed: 12/14/2022]
Abstract
Parahydrophobic surfaces are an interesting class of materials that combines both high contact angles and very strong adhesion with wetting fluids, most commonly water. This unique set of properties makes parahydrophobic surfaces attractive for a variety of applications, including water harvesting and collection, guided fluid transport, and membrane development, amongst many others. Taking inspiration from natural surfaces that display this same behavior such as rose petals and gecko feet, synthetic approaches aim to incorporate the nano- and micro-scale topography as well as the low surface energy chemistry found on these interfaces. Here, we discuss the chemical and physical factors that contribute to parahydrophobic behavior and provide a comprehensive overview on the current technologies and procedures used towards constructing surfaces that mimic this behavior already observed in nature. This includes etching processes, colloidal assemblies, deposition methods, and in situ growth of surface features. Furthermore, issues such as ease of scale-up, efficiency of technical procedures, and other current challenges associated with these methods will be discussed to provide insight as to the future directions for this growing area of research.
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Affiliation(s)
| | - Frédéric Guittard
- Université Côte d'Azur, NICE Lab, IMREDD, 61-63 Av. Simon Veil, 06200 Nice, France
| | - Thierry Darmanin
- Université Côte d'Azur, NICE Lab, IMREDD, 61-63 Av. Simon Veil, 06200 Nice, France.
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Lee Y, Kim BY, Shin DG, Kim SR, Kwon WT, Kim Y. Effects of asperities and organic-inorganic interactions on the strength of nacre-mimetic composites. Mater Sci Eng C Mater Biol Appl 2017; 71:395-400. [PMID: 27987723 DOI: 10.1016/j.msec.2016.10.034] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/15/2016] [Accepted: 10/14/2016] [Indexed: 12/28/2022]
Abstract
Nacre is a natural organic-inorganic hybrid composite, whose hierarchical structure has a complex influence on its high strength. Many structural features have been discovered, which influence the mechanical properties of nacre, and the authors have a particular interest in the role of the asperities and organic-inorganic interactions. In this study, a composite was prepared which mimics the asperity structure using clay minerals. Organic-inorganic bonding was induced with silane treatment. Both factors increased the yield strength of the composites; however, different deformation behavior was exhibited. It was found that asperities improved the strength of the composite, and that composition influences the stiffness of the composite. The organic-inorganic interaction between the resin and the other components of the composite reduced the deformation of the composite and consequently improved strength.
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Affiliation(s)
- Yoonjoo Lee
- Energy & Environment Division, Korea Institute of Ceramic Engineering and Technology, 101 Soho-ro, Jinju 52851, Republic of Korea
| | - Bo-Yeon Kim
- Energy & Environment Division, Korea Institute of Ceramic Engineering and Technology, 101 Soho-ro, Jinju 52851, Republic of Korea
| | - Dong-Geun Shin
- Convergence R&D Division, Korea Institute of Ceramic Engineering and Technology, 101 Soho-ro, Jinju 52851, Republic of Korea
| | - Soo-Ryong Kim
- Energy & Environment Division, Korea Institute of Ceramic Engineering and Technology, 101 Soho-ro, Jinju 52851, Republic of Korea
| | - Woo-Teck Kwon
- Energy & Environment Division, Korea Institute of Ceramic Engineering and Technology, 101 Soho-ro, Jinju 52851, Republic of Korea
| | - Younghee Kim
- Energy & Environment Division, Korea Institute of Ceramic Engineering and Technology, 101 Soho-ro, Jinju 52851, Republic of Korea.
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Cumming BP, Schröder-Turk GE, Debbarma S, Gu M. Bragg-mirror-like circular dichroism in bio-inspired quadruple-gyroid 4srs nanostructures. Light Sci Appl 2017; 6:e16192. [PMID: 30167193 PMCID: PMC6061894 DOI: 10.1038/lsa.2016.192] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/05/2016] [Revised: 07/11/2016] [Accepted: 07/18/2016] [Indexed: 05/25/2023]
Abstract
The smooth and tailorable spectral response of Bragg mirrors has driven their pervasive use in optical systems requiring customizable spectral control of beam propagation. However, the simple nature of Bragg mirror reflection prevents their application to the control of important polarization states such as circular polarization. While helical and gyroid-based nanostructures exhibiting circular dichroism have been developed extensively to address this limitation, they are often restricted by the spectral inconsistency of their optical response. Here we present the fabrication and characterization of quadruple-gyroid 4srs nanostructures exhibiting bio-inspired Bragg-mirror-like circular dichroism: a smooth and uniform band of circular dichroism reminiscent of the spectrum of a simple multilayer Bragg-mirror. Furthermore, we demonstrate that the circular dichroism produced by 4srs nanostructures are robust to changes in incident angle and beam collimation, providing a new platform to create and engineer circular dichroism for functional circular polarization manipulation.
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Affiliation(s)
- Benjamin P Cumming
- Laboratory of Artificial-Intelligence Nanophotonics and CUDOS, School of Science, RMIT University, Melbourne, Victoria 3001, Australia
- Centre for Micro-Photonics, Faculty of Science, Engineering and Technology, Swinburne University of Technology, Hawthorn, Victoria 3122, Australia
| | - Gerd E Schröder-Turk
- School of Engineering and Information Technology, Mathematics and Statistics, Murdoch University, Murdoch, Western Australia 6150, Australia
| | - Sukanta Debbarma
- Laser Physics Centre and CUDOS, Research School of Physical Sciences and Engineering, Australian National University, Canberra, Australian Capital Territory 2601, Australia
| | - Min Gu
- Laboratory of Artificial-Intelligence Nanophotonics and CUDOS, School of Science, RMIT University, Melbourne, Victoria 3001, Australia
- Centre for Micro-Photonics, Faculty of Science, Engineering and Technology, Swinburne University of Technology, Hawthorn, Victoria 3122, Australia
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Abstract
Contamination of biomedical devices in a biological medium, biofouling, is a major cause of infection and is entirely avoidable. This mini-review will coherently present the broad range of antifouling strategies, germicidal, preventive and cleaning using one or more of biological, chemical and physical techniques. These techniques will be discussed from the point of view of their ability to inhibit protein adsorption, usually the first step that eventually leads to fouling. Many of these approaches draw their inspiration from nature, such as emulating the nitric oxide production in endothelium, use of peptoids that mimic protein repellant peptides, zwitterionic functionalities found in membrane structures, and catechol functionalities used by mussel to immobilize poly(ethylene glycol) (PEG). More intriguing are the physical modifications, creation of micropatterns on the surface to control the hydration layer, making them either superhydrophobic or superhydrophilic. This has led to technologies that emulate the texture of shark skin, and the superhyprophobicity of self-cleaning textures found in lotus leaves. The mechanism of antifouling in each of these methods is described, and implementation of these ideas is illustrated with examples in a way that could be adapted to prevent infection in medical devices.
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Affiliation(s)
- Vinod B. Damodaran
- New Jersey Center for Biomaterials, Rutgers – The State University of New Jersey, Piscataway, NJ 08854 USA
| | - N. Sanjeeva Murthy
- New Jersey Center for Biomaterials, Rutgers – The State University of New Jersey, Piscataway, NJ 08854 USA
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48
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Das S, Carnicer-Lombarte A, Fawcett JW, Bora U. Bio-inspired nano tools for neuroscience. Prog Neurobiol 2016; 142:1-22. [PMID: 27107796 DOI: 10.1016/j.pneurobio.2016.04.008] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2015] [Revised: 04/14/2016] [Accepted: 04/15/2016] [Indexed: 01/19/2023]
Abstract
Research and treatment in the nervous system is challenged by many physiological barriers posing a major hurdle for neurologists. The CNS is protected by a formidable blood brain barrier (BBB) which limits surgical, therapeutic and diagnostic interventions. The hostile environment created by reactive astrocytes in the CNS along with the limited regeneration capacity of the PNS makes functional recovery after tissue damage difficult and inefficient. Nanomaterials have the unique ability to interface with neural tissue in the nano-scale and are capable of influencing the function of a single neuron. The ability of nanoparticles to transcend the BBB through surface modifications has been exploited in various neuro-imaging techniques and for targeted drug delivery. The tunable topography of nanofibers provides accurate spatio-temporal guidance to regenerating axons. This review is an attempt to comprehend the progress in understanding the obstacles posed by the complex physiology of the nervous system and the innovations in design and fabrication of advanced nanomaterials drawing inspiration from natural phenomenon. We also discuss the development of nanomaterials for use in Neuro-diagnostics, Neuro-therapy and the fabrication of advanced nano-devices for use in opto-electronic and ultrasensitive electrophysiological applications. The energy efficient and parallel computing ability of the human brain has inspired the design of advanced nanotechnology based computational systems. However, extensive use of nanomaterials in neuroscience also raises serious toxicity issues as well as ethical concerns regarding nano implants in the brain. In conclusion we summarize these challenges and provide an insight into the huge potential of nanotechnology platforms in neuroscience.
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Affiliation(s)
- Suradip Das
- Bioengineering Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India
| | - Alejandro Carnicer-Lombarte
- John Van Geest Centre for Brain Repair, Department of Clinical Neurosciences, University of Cambridge, Robinson Way, Cambridge CB2 0PY, United Kingdom
| | - James W Fawcett
- John Van Geest Centre for Brain Repair, Department of Clinical Neurosciences, University of Cambridge, Robinson Way, Cambridge CB2 0PY, United Kingdom
| | - Utpal Bora
- Bioengineering Laboratory, Department of Biosciences and Bioengineering, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India; Mugagen Laboratories Private Limited, Technology Incubation Complex, Indian Institute of Technology Guwahati, Guwahati 781039, Assam, India.
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49
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Morris JP, Wang Y, Backeljau T, Chapelle G. Biomimetic and bio-inspired uses of mollusc shells. Mar Genomics 2016; 27:85-90. [PMID: 27083864 DOI: 10.1016/j.margen.2016.04.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2015] [Revised: 03/30/2016] [Accepted: 04/06/2016] [Indexed: 10/21/2022]
Abstract
Climate change and ocean acidification are likely to have a profound effect on marine molluscs, which are of great ecological and economic importance. One process particularly sensitive to climate change is the formation of biominerals in mollusc shells. Fundamental research is broadening our understanding of the biomineralization process, as well as providing more informed predictions on the effects of climate change on marine molluscs. Such studies are important in their own right, but their value also extends to applied sciences. Biominerals, organic/inorganic hybrid materials with many remarkable physical and chemical properties, have been studied for decades, and the possibilities for future improved use of such materials for society are widely recognised. This article highlights the potential use of our understanding of the shell biomineralization process in novel bio-inspired and biomimetic applications. It also highlights the potential for the valorisation of shells produced as a by-product of the aquaculture industry. Studying shells and the formation of biominerals will inspire novel functional hybrid materials. It may also provide sustainable, ecologically- and economically-viable solutions to some of the problems created by current human resource exploitation.
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Affiliation(s)
- J P Morris
- Royal Belgian Institute of Natural Sciences, Rue Vautier 29, 1000 Brussels, Belgium.
| | - Y Wang
- Royal Belgian Institute of Natural Sciences, Rue Vautier 29, 1000 Brussels, Belgium.
| | - T Backeljau
- Royal Belgian Institute of Natural Sciences, Rue Vautier 29, 1000 Brussels, Belgium; Evolutionary Ecology Group, University of Antwerp, Groenenborgerlaan 171, 2020 Antwerp, Belgium
| | - G Chapelle
- Royal Belgian Institute of Natural Sciences, Rue Vautier 29, 1000 Brussels, Belgium; Rue Alphonse Renard 29, 1050 Brussels, Belgium
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50
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Chen Z, Lowry S, Jacobson A, Hasselmo ME, Milford M. Bio-inspired homogeneous multi-scale place recognition. Neural Netw 2015; 72:48-61. [PMID: 26576467 DOI: 10.1016/j.neunet.2015.10.002] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2015] [Revised: 10/11/2015] [Accepted: 10/11/2015] [Indexed: 11/22/2022]
Abstract
Robotic mapping and localization systems typically operate at either one fixed spatial scale, or over two, combining a local metric map and a global topological map. In contrast, recent high profile discoveries in neuroscience have indicated that animals such as rodents navigate the world using multiple parallel maps, with each map encoding the world at a specific spatial scale. While a number of theoretical-only investigations have hypothesized several possible benefits of such a multi-scale mapping system, no one has comprehensively investigated the potential mapping and place recognition performance benefits for navigating robots in large real world environments, especially using more than two homogeneous map scales. In this paper we present a biologically-inspired multi-scale mapping system mimicking the rodent multi-scale map. Unlike hybrid metric-topological multi-scale robot mapping systems, this new system is homogeneous, distinguishable only by scale, like rodent neural maps. We present methods for training each network to learn and recognize places at a specific spatial scale, and techniques for combining the output from each of these parallel networks. This approach differs from traditional probabilistic robotic methods, where place recognition spatial specificity is passively driven by models of sensor uncertainty. Instead we intentionally create parallel learning systems that learn associations between sensory input and the environment at different spatial scales. We also conduct a systematic series of experiments and parameter studies that determine the effect on performance of using different neural map scaling ratios and different numbers of discrete map scales. The results demonstrate that a multi-scale approach universally improves place recognition performance and is capable of producing better than state of the art performance compared to existing robotic navigation algorithms. We analyze the results and discuss the implications with respect to several recent discoveries and theories regarding how multi-scale neural maps are learnt and used in the mammalian brain.
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