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Gerard O, Ramesh S, Ramesh K, Numan A, Norhaffis Mustafa M, Khalid M, Ramesh S, Tiong SK. Evaluation of the effect of precursor ratios on the electrochemical performances of binder-free NiMn-phosphate electrodes for supercapattery. J Colloid Interface Sci 2024; 667:585-596. [PMID: 38657542 DOI: 10.1016/j.jcis.2024.04.101] [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: 02/04/2024] [Revised: 04/01/2024] [Accepted: 04/14/2024] [Indexed: 04/26/2024]
Abstract
Binary metal phosphate electrodes have been widely studied for energy storage applications due to the synergistic effects of two different transition elements that able to provide better conductivity and stability. Herein, the battery-type binder-free nickel-manganese phosphate (NiMn-phosphate) electrodes were fabricated with different Ni:Mn precursor ratios via microwave-assisted hydrothermal technique for 5 min at 90 °C. Overall, NiMn3P electrode (Ni:Mn = 1:3) showed an outstanding electrochemical performance, displaying the highest specific (areal) capacity at 3 A/g of 1262.4 C/g (0.44 C/cm2), and the smallest charge transfer resistance of 108.8 Ω. The enhanced performance of NiMn3P electrode can be ascribed to the fully grown amorphous nature and small-sized flake and flower structures of NiMn3P electrode material on the nickel foam (NF) surface. This configuration offered a higher number of active sites and a larger exposed area, facilitating efficient electrochemical reactions with the electrolyte. Consequently, the NiMn3P//AC electrode combination was chosen to further investigate its performance in supercapattery. The NiMn3P//AC supercapattery exhibited remarkable energy density of 105.4 Wh/kg and excellent cyclic stability with 84.7% retention after 3000 cycles. These findings underscored the superior electrochemical performance of the battery-type binder-free NiMn3P electrode, and highlight its potential for enhancing the overall performance of supercapattery.
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Affiliation(s)
- Ong Gerard
- Centre for Ionics University of Malaya, Department of Physics, Faculty of Science, Universiti Malaya, 50603 Kuala Lumpur, Malaysia; Institute of Sustainable Energy, Universiti Tenaga Nasional, Jalan Ikram-Uniten, 43000 Kajang, Selangor, Malaysia
| | - S Ramesh
- Centre for Ionics University of Malaya, Department of Physics, Faculty of Science, Universiti Malaya, 50603 Kuala Lumpur, Malaysia; Department of Chemistry, Saveetha School of Engineering, Institute of Medical and Technical Science, Saveetha University, Chennai 602105, Tamil Nadu, India.
| | - K Ramesh
- Centre for Ionics University of Malaya, Department of Physics, Faculty of Science, Universiti Malaya, 50603 Kuala Lumpur, Malaysia
| | - Arshid Numan
- Sunway Centre for Electrochemical Energy and Sustainable Technology (SCEEST), School of Engineering and Technology, Sunway University, No. 5, Jalan Universiti, Bandar Sunway, 47500 Subang Jaya, Selangor, Malaysia.
| | - Muhammad Norhaffis Mustafa
- Sunway Centre for Electrochemical Energy and Sustainable Technology (SCEEST), School of Engineering and Technology, Sunway University, No. 5, Jalan Universiti, Bandar Sunway, 47500 Subang Jaya, Selangor, Malaysia
| | - Mohammad Khalid
- Sunway Centre for Electrochemical Energy and Sustainable Technology (SCEEST), School of Engineering and Technology, Sunway University, No. 5, Jalan Universiti, Bandar Sunway, 47500 Subang Jaya, Selangor, Malaysia; Uttaranchal University, Dehradun 248007, Uttarakhand, India; Manipal Institute of Technology, Manipal Academy of Higher Education, Manipal 576104, Karnataka, India
| | - S Ramesh
- Institute of Sustainable Energy, Universiti Tenaga Nasional, Jalan Ikram-Uniten, 43000 Kajang, Selangor, Malaysia; Centre of Advanced Manufacturing and Material Processing, Department of Mechanical Engineering, Faculty of Engineering, University of Malaya, 50603 Kuala Lumpur, Malaysia
| | - S K Tiong
- Institute of Sustainable Energy, Universiti Tenaga Nasional, Jalan Ikram-Uniten, 43000 Kajang, Selangor, Malaysia.
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Soudagar MEM, Kiong TS, Jathar L, Nik Ghazali NN, Ramesh S, Awasarmol U, Ong HC. Perspectives on cultivation and harvesting technologies of microalgae, towards environmental sustainability and life cycle analysis. Chemosphere 2024; 353:141540. [PMID: 38423144 DOI: 10.1016/j.chemosphere.2024.141540] [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] [Subscribe] [Scholar Register] [Received: 08/09/2023] [Revised: 12/18/2023] [Accepted: 02/23/2024] [Indexed: 03/02/2024]
Abstract
The development of algae is seen as a potential and ecologically sound approach to address the increasing demands in multiple sectors. However, successful implementation of processes is highly dependent on effective growing and harvesting methods. The present study provides a complete examination of contemporary techniques employed in the production and harvesting of algae, with a particular emphasis on their sustainability. The review begins by examining several culture strategies, encompassing open ponds, closed photobioreactors, and raceway ponds. The analysis of each method is conducted in a systematic manner, with a particular focus on highlighting their advantages, limitations, and potential for expansion. This approach ensures that the conversation is in line with the objectives of sustainability. Moreover, this study explores essential elements of algae harvesting, including the processes of cell separation, dewatering, and biomass extraction. Traditional methods such as centrifugation, filtration, and sedimentation are examined in conjunction with novel, environmentally concerned strategies including flocculation, electro-coagulation, and membrane filtration. It evaluates the impacts on the environment that are caused by the cultivation process, including the usage of water and land, the use of energy, the production of carbon dioxide, and the runoff of nutrients. Furthermore, this study presents a thorough examination of the current body of research pertaining to Life Cycle Analysis (LCA) studies, presenting a perspective that emphasizes sustainability in the context of algae harvesting systems. In conclusion, the analysis ends up with an examination ahead at potential areas for future study in the cultivation and harvesting of algae. This review is an essential guide for scientists, policymakers, and industry experts associated with the advancement and implementation of algae-based technologies.
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Affiliation(s)
- Manzoore Elahi M Soudagar
- Institute of Sustainable Energy (ISE), Universiti Tenaga Nasional, Jalan IKRAM-UNITEN, 43000 Kajang, Selangor, Malaysia; Department of Mechanical Engineering, Graphic Era (Deemed to be University), Dehradun, Uttarakhand - 248002, India; Environmental and Atmospheric Sciences Research Group, Scientific Research Center, Al-Ayen University, Thi-Qar, Nasiriyah, 64001, Iraq.
| | - Tiong Sieh Kiong
- Institute of Sustainable Energy (ISE), Universiti Tenaga Nasional, Jalan IKRAM-UNITEN, 43000 Kajang, Selangor, Malaysia.
| | - Laxmikant Jathar
- Department of Mechanical Engineering, Army Institute of Technology, Pune, 411015, India.
| | - Nik Nazri Nik Ghazali
- Department of Mechanical Engineering, Faculty of Engineering, University Malaya, 50603 Kuala Lumpur, Malaysia.
| | - S Ramesh
- Institute of Sustainable Energy (ISE), Universiti Tenaga Nasional, Jalan IKRAM-UNITEN, 43000 Kajang, Selangor, Malaysia; Department of Mechanical Engineering, Faculty of Engineering, University Malaya, 50603 Kuala Lumpur, Malaysia.
| | - Umesh Awasarmol
- Department of Mechanical Engineering, Army Institute of Technology, Pune, 411015, India.
| | - Hwai Chyuan Ong
- Department of Engineering, School of Engineering and Technology, Sunway University, Jalan Universiti, Bandar Sunway, 47500, Selangor, Malaysia.
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Dolezal JM, Kochanny S, Dyer E, Ramesh S, Srisuwananukorn A, Sacco M, Howard FM, Li A, Mohan P, Pearson AT. Slideflow: deep learning for digital histopathology with real-time whole-slide visualization. BMC Bioinformatics 2024; 25:134. [PMID: 38539070 PMCID: PMC10967068 DOI: 10.1186/s12859-024-05758-x] [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] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2023] [Accepted: 03/20/2024] [Indexed: 05/04/2024] Open
Abstract
Deep learning methods have emerged as powerful tools for analyzing histopathological images, but current methods are often specialized for specific domains and software environments, and few open-source options exist for deploying models in an interactive interface. Experimenting with different deep learning approaches typically requires switching software libraries and reprocessing data, reducing the feasibility and practicality of experimenting with new architectures. We developed a flexible deep learning library for histopathology called Slideflow, a package which supports a broad array of deep learning methods for digital pathology and includes a fast whole-slide interface for deploying trained models. Slideflow includes unique tools for whole-slide image data processing, efficient stain normalization and augmentation, weakly-supervised whole-slide classification, uncertainty quantification, feature generation, feature space analysis, and explainability. Whole-slide image processing is highly optimized, enabling whole-slide tile extraction at 40x magnification in 2.5 s per slide. The framework-agnostic data processing pipeline enables rapid experimentation with new methods built with either Tensorflow or PyTorch, and the graphical user interface supports real-time visualization of slides, predictions, heatmaps, and feature space characteristics on a variety of hardware devices, including ARM-based devices such as the Raspberry Pi.
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Affiliation(s)
- James M Dolezal
- Section of Hematology/Oncology, Department of Medicine, University of Chicago Medical Center, Chicago, IL, USA.
| | - Sara Kochanny
- Section of Hematology/Oncology, Department of Medicine, University of Chicago Medical Center, Chicago, IL, USA
| | - Emma Dyer
- Section of Hematology/Oncology, Department of Medicine, University of Chicago Medical Center, Chicago, IL, USA
| | - Siddhi Ramesh
- Section of Hematology/Oncology, Department of Medicine, University of Chicago Medical Center, Chicago, IL, USA
| | - Andrew Srisuwananukorn
- Division of Hematology, Department of Internal Medicine, The Ohio State University Comprehensive Cancer Center, Columbus, OH, USA
| | - Matteo Sacco
- Section of Hematology/Oncology, Department of Medicine, University of Chicago Medical Center, Chicago, IL, USA
| | - Frederick M Howard
- Section of Hematology/Oncology, Department of Medicine, University of Chicago Medical Center, Chicago, IL, USA
| | - Anran Li
- Section of Hematology/Oncology, Department of Medicine, University of Chicago Medical Center, Chicago, IL, USA
| | - Prajval Mohan
- Department of Computer Science, University of Chicago, Chicago, IL, USA
| | - Alexander T Pearson
- Section of Hematology/Oncology, Department of Medicine, University of Chicago Medical Center, Chicago, IL, USA.
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Howard FM, Hieromnimon HM, Ramesh S, Dolezal J, Kochanny S, Zhang Q, Feiger B, Peterson J, Fan C, Perou CM, Vickery J, Sullivan M, Cole K, Khramtsova G, Pearson AT. Generative Adversarial Networks Accurately Reconstruct Pan-Cancer Histology from Pathologic, Genomic, and Radiographic Latent Features. bioRxiv 2024:2024.03.22.586306. [PMID: 38585926 PMCID: PMC10996476 DOI: 10.1101/2024.03.22.586306] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/09/2024]
Abstract
Artificial intelligence models have been increasingly used in the analysis of tumor histology to perform tasks ranging from routine classification to identification of novel molecular features. These approaches distill cancer histologic images into high-level features which are used in predictions, but understanding the biologic meaning of such features remains challenging. We present and validate a custom generative adversarial network - HistoXGAN - capable of reconstructing representative histology using feature vectors produced by common feature extractors. We evaluate HistoXGAN across 29 cancer subtypes and demonstrate that reconstructed images retain information regarding tumor grade, histologic subtype, and gene expression patterns. We leverage HistoXGAN to illustrate the underlying histologic features for deep learning models for actionable mutations, identify model reliance on histologic batch effect in predictions, and demonstrate accurate reconstruction of tumor histology from radiographic imaging for a 'virtual biopsy'.
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Rizwana MM, Shanmugapriya S, Sudha MJ, Appalaraju B, Ramesh S. Staphylococcal scalded skin syndrome in neonate: Another face of CA-MRSA. INDIAN J PATHOL MICR 2024:00004270-990000000-00148. [PMID: 38427766 DOI: 10.4103/ijpm.ijpm_833_23] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/07/2023] [Accepted: 12/28/2023] [Indexed: 03/03/2024] Open
Abstract
ABSTRACT Staphylococcal scalded skin syndrome (SSSS), also known as Ritter's disease, in its severe form occurs predominantly in infants and children. It is caused by infection with group II (often phage group 71) Staphylococcus aureus. The foci of infection include nasopharynx, less commonly umbilicus, urinary tract, superficial abrasion, conjunctivae, and blood. Staphylococci are non-motile, non-spore-forming, catalase-positive, gram-positive cocci that appear predominantly as grape-like clusters. Although this organism is frequently a part of normal human microbial flora, it can cause significant opportunistic infections under certain conditions such as when extremes of age groups are involved, the presence of indwelling medical devices, and intravenous (iv) drug abuse. Staphylococcus aureus may cause a variety of infectious manifestations ranging from relatively benign skin infections to life-threatening systemic illnesses. SSSS caused by S. aureus strains produces exfoliative toxins which result in the development of blisters, erythema, and desquamation. Here, we present a case of an 11-day-old neonate who was diagnosed with SSSS. The causative agent responsible for this syndrome was identified as methicillin-resistant Staphylococcus aureus (MRSA). The molecular characterization of the gene Panton-Valentine leukocidin (PVL) was done by polymerase chain reaction (PCR) and was detected positive for PVL which is a distinctive virulence factor seen almost in all of the community-acquired MRSA strains. The patient was discharged after parenteral clindamycin therapy with almost complete resolution of symptoms.
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Affiliation(s)
- M Mohamadiya Rizwana
- Department of Microbiology, PSG Institute of Medical Sciences and Research (PSGIMSR), Coimbatore, Tamil Nadu, India
| | - S Shanmugapriya
- Department of Microbiology, PSG Institute of Medical Sciences and Research (PSGIMSR), Coimbatore, Tamil Nadu, India
| | - M Jaya Sudha
- Department of Microbiology, PSG Institute of Medical Sciences and Research (PSGIMSR), Coimbatore, Tamil Nadu, India
| | - B Appalaraju
- Department of Microbiology, PSG Institute of Medical Sciences and Research (PSGIMSR), Coimbatore, Tamil Nadu, India
| | - S Ramesh
- Department of Pediatrics, PSG Institute of Medical Sciences and Research (PSGIMSR), Coimbatore, Tamil Nadu, India
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Beera CS, Dhanalakshmi B, Devi DN, Vijayalakshmi D, Mishra A, Ramesh S, Rao BP, Shyamala P, Menelaou M, Alanazi N, Alodhayb AN. Magnetic and Magnetostrictive Properties of Sol-Gel-Synthesized Chromium-Substituted Cobalt Ferrite. Gels 2023; 9:873. [PMID: 37998963 PMCID: PMC10671203 DOI: 10.3390/gels9110873] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/02/2023] [Revised: 10/23/2023] [Accepted: 10/24/2023] [Indexed: 11/25/2023] Open
Abstract
Chromium (Cr)-doped cobalt ferrite nanoparticles were synthesized using a sol-gel autocombustion method, with the chemical formula CoCrxFe2xO4. The value of x ranged from 0.00 to 0.5 in 0.1 increments. X-ray diffraction analysis confirmed the development of highly crystalline cubic spinel structures for all samples, with an average crystallite size of approximately 40 to 45 nm determined using the Scherrer equation. Pellets were prepared using a traditional ceramic method. The magnetic and magnetostrictive properties of the samples were tested using strain gauge and VSM (vibrating sample magnetometer) techniques. The results of the magnetic and magnetostrictive tests showed that the chromium-substituted cobalt ferrites exhibited higher strain derivative magnitudes than pure cobalt ferrite. These findings indicated that the introduction of chromium into the cobalt ferrite structure led to changes in the material's magnetic properties. These changes were attributed to anisotropic contributions, resulting from an increased presence of Co2+ ions at B-sites due to the chromium substitutions. In summary, this study concluded that introducing chromium into the cobalt ferrite structure caused alterations in the material's magnetic properties, which were explained by changes in the cationic arrangement within the crystal lattice. This study successfully explained these alterations using magnetization and coercivity data and the probable cationic dispersion.
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Affiliation(s)
- Chandra Sekhar Beera
- Vignan’s Institute of Engineering for Women (Autonomous), Visakhapatnam 530046, AP, India
| | - B. Dhanalakshmi
- Vignan’s Institute of Information Technology (VIIT-A), Visakhapatnam 530049, AP, India
| | - D. Nirmala Devi
- Vignan’s Institute of Engineering for Women (Autonomous), Visakhapatnam 530046, AP, India
| | - D. Vijayalakshmi
- Vignan’s Institute of Engineering for Women (Autonomous), Visakhapatnam 530046, AP, India
| | - Akanksha Mishra
- Vignan’s Institute of Engineering for Women (Autonomous), Visakhapatnam 530046, AP, India
| | - S. Ramesh
- Department of Physics, GSS, GITAM Deemed to be University, Visakhapatnam 530045, AP, India
| | | | - P. Shyamala
- Department of Chemistry, Andhra University, Visakhapatnam 530003, AP, India;
| | - Melita Menelaou
- Department of Chemical Engineering, Cyprus University of Technology, 30 Arch. Kyprianos Str., Limassol 3036, Cyprus;
| | - Nadyah Alanazi
- Department of Physics and Astronomy, College of Science, King Saud University, Riyadh 11451, Saudi Arabia;
| | - Abdullah N. Alodhayb
- Department of Physics and Astronomy, College of Science, King Saud University, Riyadh 11451, Saudi Arabia;
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Sinha SD, Perapogu S, Chary S S, Ramesh S, Bakshi J, Singh A, Ahmed AK, Mohan Reddy B, Panapakam M, Talluri L, Vattipalli R. Efficacy and safety of fixed-dose combination of Bilastine-Montelukast in adult patients with allergic rhinitis: a phase III, randomized, multi-center, double-blind, active controlled clinical study. J Asthma 2023; 60:2014-2020. [PMID: 37140964 DOI: 10.1080/02770903.2023.2209175] [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: 01/31/2023] [Revised: 04/20/2023] [Accepted: 04/26/2023] [Indexed: 05/05/2023]
Abstract
BACKGROUND Histamine and cysteinyl leukotrienes (CysLTs) are potent inflammatory mediators in allergic rhinitis (AR). Studies involving other combinations of antihistaminics (Levocetirizine) and highly selective leukotriene receptor antagonist (LTA) (Montelukast) combination have shown additive benefits and are widely prescribed for AR. OBJECTIVE Evaluate the efficacy and safety of Bilastine 20 mg and Montelukast 10 mg fixed-dose combination (FDC) therapy in patients with AR. METHODS A randomized, double-blind, comparative, parallel, phase III study was conducted to evaluate efficacy and safety of Bilastine 20 mg and Montelukast 10 mg FDC at 16 tertiary care otolaryngology centres in India. Adult patients with AR for one year with IgE antibody positive and 12-h NSS score >36 in 3 days were randomized to receive either Bilastine 20 mg and Montelukast 10 mg or Montelukast 10 mg & Levocetirizine 5 mg tablets for 4 weeks. The change in total symptom score (nasal symptom scores (NSS) & non-nasal symptom scores (NNSS)) from baseline to week 4 was assessed as primary endpoint. Secondary endpoints included changes in TSS, NSS, NNSS, individual symptom scores (ISS), Rhinoconjunctivitis Quality of Life (RQLQ), discomfort due to rhinitis (VAS), and clinical global impression (CGI) scores. RESULTS The change in mean TSS from baseline to week 4 in Test group (16.6 units) was comparable to reference group (17 units) (p= 0.8876). The difference in change in mean NSS, NNSS and ISS from baseline to day 7, 14, 28 were comparable. RQLQ improved from baseline to Day 28. Significant improvements were observed in discomfort due to AR measured by VAS and CGI scores from baseline to day 14 and 28. The safety and tolerability of patients were comparable between the groups. All adverse events (AEs) were mild to moderate in severity. No patient discontinued due to AEs. CONCLUSIONS The FDC of Bilastine 20 mg and Montelukast 10 mg was efficacious and well tolerated in Indian patients with AR.
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Affiliation(s)
- Shubhadeep D Sinha
- Department of Clinical Development & Medical Affairs, Hetero, Hyderabad, Telengana, India
| | - Sridevi Perapogu
- Department of ENT, Government Medical College & Hospital, SPSR, Nellore, Andhra Pradesh, India
| | - Sreenivasa Chary S
- Department of Clinical Development & Medical Affairs, Hetero, Hyderabad, Telengana, India
| | - S Ramesh
- Department of ENT, Govt Medical College & Govt General Hospital, Srikakulam, Andhra Pradesh, India
| | - Jaimanti Bakshi
- Department of ENT, Postgraduate Institute of Medical Education and Research, Chandigarh, India
| | - Ajit Singh
- Division of Allergy & Pulmonary Medicine, Dhanvantri OPD Block, SMS Hospital, Jaipur, Rajasthan, India
| | | | - B Mohan Reddy
- Department of Clinical Development & Medical Affairs, Hetero, Hyderabad, Telengana, India
| | - Muralidhar Panapakam
- Department of Clinical Development & Medical Affairs, Hetero, Hyderabad, Telengana, India
| | - Leela Talluri
- Department of Clinical Development & Medical Affairs, Hetero, Hyderabad, Telengana, India
| | - Ramya Vattipalli
- Department of Clinical Development & Medical Affairs, Hetero, Hyderabad, Telengana, India
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Chen Y, Gong Y, Shan L, Tan CY, Al-Furjan MS, Ramesh S, Chen H, Bian X, Chen Y, Liu Y, Zhou R. Research on Cartilage 3D Printing Technology Based on SA-GA-HA. Materials (Basel) 2023; 16:5312. [PMID: 37570016 PMCID: PMC10419889 DOI: 10.3390/ma16155312] [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] [Subscribe] [Scholar Register] [Received: 06/26/2023] [Revised: 07/14/2023] [Accepted: 07/19/2023] [Indexed: 08/13/2023]
Abstract
Cartilage damage is difficult to heal and poses a serious problem to human health as it can lead to osteoarthritis. In this work, we explore the application of biological 3D printing to manufacture new cartilage scaffolds to promote cartilage regeneration. The hydrogel made by mixing sodium alginate (SA) and gelatin (GA) has high biocompatibility, but its mechanical properties are poor. The addition of hydroxyapatite (HA) can enhance its mechanical properties. In this paper, the preparation scheme of the SA-GA-HA composite hydrogel cartilage scaffold was explored, the scaffolds prepared with different concentrations were compared, and better formulations were obtained for printing and testing. Mathematical modeling of the printing process of the bracket, simulation analysis of the printing process based on the mathematical model, and adjustment of actual printing parameters based on the results of the simulation were performed. The cartilage scaffold, which was printed using Bioplotter 3D printer, exhibited useful mechanical properties suitable for practical needs. In addition, ATDC-5 cells were seeded on the cartilage scaffolds and the cell survival rate was found to be higher after one week. The findings demonstrated that the fabricated chondrocyte scaffolds had better mechanical properties and biocompatibility, providing a new scaffold strategy for cartilage tissue regeneration.
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Affiliation(s)
- Yong Chen
- School of Mechanical Engineering, Hangzhou Dianzi University, Hangzhou 310018, China (R.Z.)
| | - Youping Gong
- School of Mechanical Engineering, Hangzhou Dianzi University, Hangzhou 310018, China (R.Z.)
- State Key Laboratory of Fluid Power and Mechatronic Systems, School of Mechanical Engineering, Zhejiang University, Hangzhou 310027, China
| | - Lijun Shan
- Department of Mechanical Engineering, Faculty of Engineering, Universiti Malaya, Kuala Lumpur 50603, Malaysia
| | - Chou Yong Tan
- Department of Mechanical Engineering, Faculty of Engineering, Universiti Malaya, Kuala Lumpur 50603, Malaysia
| | - MS Al-Furjan
- State Key Laboratory of Mechanics and Control for Aerospace Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
- Collaborative Innovation Center of High-End Laser Manufacturing Equipment (National “2011 Plan”), Zhejiang University of Technology, Hangzhou 310023, China
| | - S. Ramesh
- Department of Mechanical Engineering, Faculty of Engineering, Universiti Malaya, Kuala Lumpur 50603, Malaysia
- Institute of Power Engineering, College of Engineering, Universiti Tenaga National, Km-7, Jalan Ikram-Uniten, Kajang 43009, Selangor, Malaysia
| | - Huipeng Chen
- School of Mechanical Engineering, Hangzhou Dianzi University, Hangzhou 310018, China (R.Z.)
- State Key Laboratory of Fluid Power and Mechatronic Systems, School of Mechanical Engineering, Zhejiang University, Hangzhou 310027, China
| | - Xiangjuan Bian
- Faculty of Science and Technology, Zhejiang International Studies University, Hangzhou 310030, China
| | - Yanda Chen
- School of Mechanical Engineering, Hangzhou Dianzi University, Hangzhou 310018, China (R.Z.)
| | - Yunfeng Liu
- Collaborative Innovation Center of High-End Laser Manufacturing Equipment (National “2011 Plan”), Zhejiang University of Technology, Hangzhou 310023, China
| | - Rougang Zhou
- School of Mechanical Engineering, Hangzhou Dianzi University, Hangzhou 310018, China (R.Z.)
- Wenzhou Institute, Hangzhou Dianzi University, 3-4/F, Building B, Zhejiang Yungu, Nanyang Avenue, Yaoxi Street, Longwan District, Hangzhou 325038, China
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9
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Huelsmeyer M, Kuzman D, Bončina M, Martinez J, Steinbrugger C, Weusten J, Calero-Rubio C, Roche W, Niederhaus B, VanHaelst Y, Hrynyk M, Ballesta P, Achard H, Augusto S, Guillois M, Pszczolinski C, Gerasimov M, Neyra C, Ponduri D, Ramesh S, Clénet D. A universal tool for stability predictions of biotherapeutics, vaccines and in vitro diagnostic products. Sci Rep 2023; 13:10077. [PMID: 37344503 DOI: 10.1038/s41598-023-35870-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2023] [Accepted: 05/25/2023] [Indexed: 06/23/2023] Open
Abstract
It is of particular interest for biopharmaceutical companies developing and distributing fragile biomolecules to warrant the stability and activity of their products during long-term storage and shipment. In accordance with quality by design principles, advanced kinetic modeling (AKM) has been successfully used to predict long-term product shelf-life and relies on data from short-term accelerated stability studies that are used to generate Arrhenius-based kinetic models that can, in turn, be exploited for stability forecasts. The AKM methodology was evaluated through a cross-company perspective on stability modeling for key stability indicating attributes of different types of biotherapeutics, vaccines and biomolecules combined in in vitro diagnostic kits. It is demonstrated that stability predictions up to 3 years for products maintained under recommended storage conditions (2-8 °C) or for products that have experienced temperature excursions outside the cold-chain show excellent agreement with experimental real-time data, thus confirming AKM as a universal and reliable tool for stability predictions for a wide range of product types.
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Affiliation(s)
- M Huelsmeyer
- Drug Product Development, AbbVie, Ludwigshafen, Germany
| | - D Kuzman
- Biologics Drug Product, Technical R&D, Global Drug Development, Novartis , Mengeš, Slovenia
| | - M Bončina
- Biologics Drug Product, Technical R&D, Global Drug Development, Novartis , Mengeš, Slovenia
| | - J Martinez
- R&D Immunoassays, Biomolecule Engineering - bioMAP, bioMérieux, Marcy L'étoile, France
| | - C Steinbrugger
- R&D Immunoassays, Biomolecule Engineering - bioMAP, bioMérieux, Marcy L'étoile, France
| | - J Weusten
- Center for Mathematical Sciences, MSD, Oss, The Netherlands
| | - C Calero-Rubio
- Biologics Drug Product Development & Manufacturing, Sanofi, Framingham, USA
| | - W Roche
- MSAT, Sanofi, Waterford, Ireland
| | - B Niederhaus
- CMC-Biologics Statistics, Sanofi, Frankfurt, Germany
| | - Y VanHaelst
- CMC-Biologics Statistics, Sanofi, Gent, Germany
| | - M Hrynyk
- Global Drug Product Bioprocess Development, Sanofi, Toronto, Canada
| | - P Ballesta
- Altran Technologies, Capgemini Engineering, Lyon, France
| | - H Achard
- Altran Technologies, Capgemini Engineering, Lyon, France
| | - S Augusto
- Manufacturing Technology Department, Sanofi, Val-de-Reuil, France
| | - M Guillois
- Manufacturing Technology Department, Sanofi, Val-de-Reuil, France
| | - C Pszczolinski
- Manufacturing Technology Department, Sanofi, Val-de-Reuil, France
| | - M Gerasimov
- Manufacturing Technology Department, Sanofi, Swiftwater, USA
| | - C Neyra
- Manufacturing Technology Department, Sanofi, Swiftwater, USA
| | - D Ponduri
- Manufacturing Technology Department, Sanofi, Hyderabad, India
| | - S Ramesh
- Manufacturing Technology Department, Sanofi, Hyderabad, India
| | - D Clénet
- Global Drug Product Bioprocess Development, Sanofi, Marcy L'étoile, France.
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10
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Kumar SSA, M NB, Batoo KM, Wonnie Ma IA, Ramesh K, Ramesh S, Shah MA. Fabrication and characterization of graphene oxide-based polymer nanocomposite coatings, improved stability and hydrophobicity. Sci Rep 2023; 13:8946. [PMID: 37268705 DOI: 10.1038/s41598-023-35154-z] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Accepted: 05/13/2023] [Indexed: 06/04/2023] Open
Abstract
In this study, acrylic-epoxy-based nanocomposite coatings loaded with different concentrations (0.5-3 wt.%) of graphene oxide (GO) nanoparticles were successfully prepared via the solution intercalation approach. The thermogravimetric analysis (TGA) revealed that the inclusion of GO nanoparticles into the polymer matrix increased the thermal stability of the coatings. The degree of transparency evaluated by the ultraviolet-visible (UV-Vis) spectroscopy showed that the lowest loading rate of GO (0.5 wt.%) had completely blocked the incoming irradiation, thus resulting in zero percent transmittance. Furthermore, the water contact angle (WCA) measurements revealed that the incorporation of GO nanoparticles and PDMS into the polymer matrix had remarkably enhanced the surface hydrophobicity, exhibiting the highest WCA of 87.55º. In addition, the cross-hatch test (CHT) showed that all the hybrid coatings exhibited excellent surface adhesion behaviour, receiving 4B and 5B ratings respectively. Moreover, the field emission scanning electron microscopy (FESEM) micrographs confirmed that the presence of the functional groups on the GO surface facilitated the chemical functionalization process, which led to excellent dispersibility. The GO composition up to 2 wt.% showed excellent dispersion and uniform distribution of the GO nanoparticles within the polymer matrix. Therefore, the unique features of graphene and its derivatives have emerged as a new class of nanofillers/inhibitors for corrosion protection applications.
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Affiliation(s)
- Sachin Sharma Ashok Kumar
- Centre for Ionics University of Malaya, Department of Physics, Faculty of Science, Universiti Malaya, 50603, Kuala Lumpur, Malaysia
| | - Nujud Badawi M
- Centre for Ionics University of Malaya, Department of Physics, Faculty of Science, Universiti Malaya, 50603, Kuala Lumpur, Malaysia
| | - Khalid Mujasam Batoo
- King Abdullah Institute for Nanotechnology, King Saud University, P.O. Box-2455, 11451, Riyadh, Saudi Arabia.
| | - I A Wonnie Ma
- Centre for Ionics University of Malaya, Department of Physics, Faculty of Science, Universiti Malaya, 50603, Kuala Lumpur, Malaysia
| | - K Ramesh
- Centre for Ionics University of Malaya, Department of Physics, Faculty of Science, Universiti Malaya, 50603, Kuala Lumpur, Malaysia.
- Department of Physics/Saveetha School of Engineering, Saveetha University (SIMATS), Chennai, India.
| | - S Ramesh
- Centre for Ionics University of Malaya, Department of Physics, Faculty of Science, Universiti Malaya, 50603, Kuala Lumpur, Malaysia
- Department of Physics/Saveetha School of Engineering, Saveetha University (SIMATS), Chennai, India
| | - Mohd Asif Shah
- College of Business and Economics, Kebri Dehar University, 250, Kebri Dehar, Somali, Ethiopia.
- School of Business, Woxsen University, Kamkole, Sadasivpet, Hyderabad, Telangana, 502345, India.
- Division of Research and Development, Lovely Professional University, Phagwara, 144001, Punjab, India.
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11
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Dolezal JM, Wolk R, Hieromnimon HM, Howard FM, Srisuwananukorn A, Karpeyev D, Ramesh S, Kochanny S, Kwon JW, Agni M, Simon RC, Desai C, Kherallah R, Nguyen TD, Schulte JJ, Cole K, Khramtsova G, Garassino MC, Husain AN, Li H, Grossman R, Cipriani NA, Pearson AT. Deep learning generates synthetic cancer histology for explainability and education. NPJ Precis Oncol 2023; 7:49. [PMID: 37248379 PMCID: PMC10227067 DOI: 10.1038/s41698-023-00399-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2023] [Accepted: 05/12/2023] [Indexed: 05/31/2023] Open
Abstract
Artificial intelligence methods including deep neural networks (DNN) can provide rapid molecular classification of tumors from routine histology with accuracy that matches or exceeds human pathologists. Discerning how neural networks make their predictions remains a significant challenge, but explainability tools help provide insights into what models have learned when corresponding histologic features are poorly defined. Here, we present a method for improving explainability of DNN models using synthetic histology generated by a conditional generative adversarial network (cGAN). We show that cGANs generate high-quality synthetic histology images that can be leveraged for explaining DNN models trained to classify molecularly-subtyped tumors, exposing histologic features associated with molecular state. Fine-tuning synthetic histology through class and layer blending illustrates nuanced morphologic differences between tumor subtypes. Finally, we demonstrate the use of synthetic histology for augmenting pathologist-in-training education, showing that these intuitive visualizations can reinforce and improve understanding of histologic manifestations of tumor biology.
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Affiliation(s)
- James M Dolezal
- Section of Hematology/Oncology, Department of Medicine, University of Chicago Medicine, Chicago, IL, USA
| | - Rachelle Wolk
- Department of Pathology, University of Chicago Medicine, Chicago, IL, USA
| | - Hanna M Hieromnimon
- Section of Hematology/Oncology, Department of Medicine, University of Chicago Medicine, Chicago, IL, USA
| | - Frederick M Howard
- Section of Hematology/Oncology, Department of Medicine, University of Chicago Medicine, Chicago, IL, USA
| | | | | | - Siddhi Ramesh
- Section of Hematology/Oncology, Department of Medicine, University of Chicago Medicine, Chicago, IL, USA
| | - Sara Kochanny
- Section of Hematology/Oncology, Department of Medicine, University of Chicago Medicine, Chicago, IL, USA
| | - Jung Woo Kwon
- Department of Pathology, University of Chicago Medicine, Chicago, IL, USA
| | - Meghana Agni
- Department of Pathology, University of Chicago Medicine, Chicago, IL, USA
| | - Richard C Simon
- Department of Pathology, University of Chicago Medicine, Chicago, IL, USA
| | - Chandni Desai
- Department of Pathology, University of Chicago Medicine, Chicago, IL, USA
| | - Raghad Kherallah
- Department of Pathology, University of Chicago Medicine, Chicago, IL, USA
| | - Tung D Nguyen
- Department of Pathology, University of Chicago Medicine, Chicago, IL, USA
| | - Jefree J Schulte
- Department of Pathology and Laboratory Medicine, University of Wisconsin at Madison, Madison, WN, USA
| | - Kimberly Cole
- Department of Pathology, University of Chicago Medicine, Chicago, IL, USA
| | - Galina Khramtsova
- Department of Pathology, University of Chicago Medicine, Chicago, IL, USA
| | - Marina Chiara Garassino
- Section of Hematology/Oncology, Department of Medicine, University of Chicago Medicine, Chicago, IL, USA
| | - Aliya N Husain
- Department of Pathology, University of Chicago Medicine, Chicago, IL, USA
| | - Huihua Li
- Department of Pathology, University of Chicago Medicine, Chicago, IL, USA
| | - Robert Grossman
- University of Chicago, Center for Translational Data Science, Chicago, IL, USA
| | - Nicole A Cipriani
- Department of Pathology, University of Chicago Medicine, Chicago, IL, USA.
| | - Alexander T Pearson
- Section of Hematology/Oncology, Department of Medicine, University of Chicago Medicine, Chicago, IL, USA.
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12
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Gao CA, Howard FM, Markov NS, Dyer EC, Ramesh S, Luo Y, Pearson AT. Comparing scientific abstracts generated by ChatGPT to real abstracts with detectors and blinded human reviewers. NPJ Digit Med 2023; 6:75. [PMID: 37100871 PMCID: PMC10133283 DOI: 10.1038/s41746-023-00819-6] [Citation(s) in RCA: 77] [Impact Index Per Article: 77.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2023] [Accepted: 03/30/2023] [Indexed: 04/28/2023] Open
Abstract
Large language models such as ChatGPT can produce increasingly realistic text, with unknown information on the accuracy and integrity of using these models in scientific writing. We gathered fifth research abstracts from five high-impact factor medical journals and asked ChatGPT to generate research abstracts based on their titles and journals. Most generated abstracts were detected using an AI output detector, 'GPT-2 Output Detector', with % 'fake' scores (higher meaning more likely to be generated) of median [interquartile range] of 99.98% 'fake' [12.73%, 99.98%] compared with median 0.02% [IQR 0.02%, 0.09%] for the original abstracts. The AUROC of the AI output detector was 0.94. Generated abstracts scored lower than original abstracts when run through a plagiarism detector website and iThenticate (higher scores meaning more matching text found). When given a mixture of original and general abstracts, blinded human reviewers correctly identified 68% of generated abstracts as being generated by ChatGPT, but incorrectly identified 14% of original abstracts as being generated. Reviewers indicated that it was surprisingly difficult to differentiate between the two, though abstracts they suspected were generated were vaguer and more formulaic. ChatGPT writes believable scientific abstracts, though with completely generated data. Depending on publisher-specific guidelines, AI output detectors may serve as an editorial tool to help maintain scientific standards. The boundaries of ethical and acceptable use of large language models to help scientific writing are still being discussed, and different journals and conferences are adopting varying policies.
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Affiliation(s)
- Catherine A Gao
- Division of Pulmonary and Critical Care, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, USA.
| | - Frederick M Howard
- Section of Hematology/Oncology, Department of Medicine, University of Chicago, Chicago, IL, USA
| | - Nikolay S Markov
- Division of Pulmonary and Critical Care, Department of Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Emma C Dyer
- Section of Hematology/Oncology, Department of Medicine, University of Chicago, Chicago, IL, USA
| | - Siddhi Ramesh
- Section of Hematology/Oncology, Department of Medicine, University of Chicago, Chicago, IL, USA
| | - Yuan Luo
- Division of Health and Biomedical Informatics, Department of Preventive Medicine, Northwestern University Feinberg School of Medicine, Chicago, IL, USA
| | - Alexander T Pearson
- Section of Hematology/Oncology, Department of Medicine, University of Chicago, Chicago, IL, USA
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13
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Saldanha OL, Loeffler CML, Niehues JM, van Treeck M, Seraphin TP, Hewitt KJ, Cifci D, Veldhuizen GP, Ramesh S, Pearson AT, Kather JN. Self-supervised attention-based deep learning for pan-cancer mutation prediction from histopathology. NPJ Precis Oncol 2023; 7:35. [PMID: 36977919 PMCID: PMC10050159 DOI: 10.1038/s41698-023-00365-0] [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] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/22/2022] [Accepted: 02/17/2023] [Indexed: 03/30/2023] Open
Abstract
The histopathological phenotype of tumors reflects the underlying genetic makeup. Deep learning can predict genetic alterations from pathology slides, but it is unclear how well these predictions generalize to external datasets. We performed a systematic study on Deep-Learning-based prediction of genetic alterations from histology, using two large datasets of multiple tumor types. We show that an analysis pipeline that integrates self-supervised feature extraction and attention-based multiple instance learning achieves a robust predictability and generalizability.
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Affiliation(s)
- Oliver Lester Saldanha
- Else Kroener Fresenius Center for Digital Health, Medical Faculty Carl Gustav Carus, Technical University Dresden, Dresden, Germany
- Department of Medicine III, University Hospital RWTH Aachen, Aachen, Germany
| | - Chiara M L Loeffler
- Else Kroener Fresenius Center for Digital Health, Medical Faculty Carl Gustav Carus, Technical University Dresden, Dresden, Germany
- Department of Medicine III, University Hospital RWTH Aachen, Aachen, Germany
| | - Jan Moritz Niehues
- Else Kroener Fresenius Center for Digital Health, Medical Faculty Carl Gustav Carus, Technical University Dresden, Dresden, Germany
- Department of Medicine III, University Hospital RWTH Aachen, Aachen, Germany
| | - Marko van Treeck
- Else Kroener Fresenius Center for Digital Health, Medical Faculty Carl Gustav Carus, Technical University Dresden, Dresden, Germany
- Department of Medicine III, University Hospital RWTH Aachen, Aachen, Germany
| | - Tobias P Seraphin
- Department of Gastroenterology, Hepatology and Infectious Diseases, University Hospital Duesseldorf, Medical Faculty at Heinrich-Heine-University Duesseldorf, Düsseldorf, Germany
| | - Katherine Jane Hewitt
- Else Kroener Fresenius Center for Digital Health, Medical Faculty Carl Gustav Carus, Technical University Dresden, Dresden, Germany
- Department of Medicine III, University Hospital RWTH Aachen, Aachen, Germany
| | - Didem Cifci
- Else Kroener Fresenius Center for Digital Health, Medical Faculty Carl Gustav Carus, Technical University Dresden, Dresden, Germany
- Department of Medicine III, University Hospital RWTH Aachen, Aachen, Germany
| | - Gregory Patrick Veldhuizen
- Else Kroener Fresenius Center for Digital Health, Medical Faculty Carl Gustav Carus, Technical University Dresden, Dresden, Germany
- Department of Medicine III, University Hospital RWTH Aachen, Aachen, Germany
| | - Siddhi Ramesh
- Pritzker School of Medicine, University of Chicago, Chicago, IL, USA
| | - Alexander T Pearson
- Biological Sciences Division, University of Chicago, Chicago, IL, USA
- University of Chicago Comprehensive Cancer Center, University of Chicago, Chicago, IL, USA
| | - Jakob Nikolas Kather
- Else Kroener Fresenius Center for Digital Health, Medical Faculty Carl Gustav Carus, Technical University Dresden, Dresden, Germany.
- Department of Medicine III, University Hospital RWTH Aachen, Aachen, Germany.
- Pathology & Data Analytics, Leeds Institute of Medical Research at St James's, University of Leeds, Leeds, UK.
- Medical Oncology, National Center for Tumor Diseases (NCT), University Hospital Heidelberg, Heidelberg, Germany.
- Department of Medicine 1, University Hospital and Faculty of Medicine Carl Gustav Carus, Technische Universität Dresden, Dresden, Germany.
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14
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Abstract
Machine learning methods have been growing in prominence across all areas of medicine. In pathology, recent advances in deep learning (DL) have enabled computational analysis of histological samples, aiding in diagnosis and characterization in multiple disease areas. In cancer, and particularly endocrine cancer, DL approaches have been shown to be useful in tasks ranging from tumor grading to gene expression prediction. This review summarizes the current state of DL research in endocrine cancer histopathology with an emphasis on experimental design, significant findings, and key limitations.
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Affiliation(s)
- Siddhi Ramesh
- Department of Medicine, Section of Hematology/Oncology, University of Chicago Medical Center, 5841 South Maryland Avenue, MC 2115, Chicago, IL 60637, USA; The University of Chicago Medicine & Biological Sciences, 5841 South Maryland Avenue, Chicago, IL, USA
| | - James M Dolezal
- Department of Medicine, Section of Hematology/Oncology, University of Chicago Medical Center, 5841 South Maryland Avenue, MC 2115, Chicago, IL 60637, USA; The University of Chicago Medicine & Biological Sciences, 5841 South Maryland Avenue, Chicago, IL, USA
| | - Alexander T Pearson
- Department of Medicine, Section of Hematology/Oncology, University of Chicago Medical Center, 5841 South Maryland Avenue, MC 2115, Chicago, IL 60637, USA; University of Chicago Comprehensive Cancer Center, Chicago, IL, USA; The University of Chicago Medicine & Biological Sciences, 5841 South Maryland Avenue, Chicago, IL, USA.
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15
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Natarajan E, Ramesh S, Markandan K, Saravanakumar N, Dilip AA, Batcha ARS. Enhanced mechanical, tribological, and acoustical behavior of polyphenylene sulfide composites reinforced with zero‐dimensional alumina. J Appl Polym Sci 2023. [DOI: 10.1002/app.53748] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/18/2023]
Affiliation(s)
- Elango Natarajan
- Faculty of Engineering, Technology and Built Environment UCSI University Kuala Lumpur Malaysia
- Department of Mechanical Engineering PSG Institute of Technology and Applied Research Coimbatore India
| | - S. Ramesh
- Department of Mechanical Engineering Jerusalam College of Engineering Chennai India
| | - Kalaimani Markandan
- Faculty of Engineering, Technology and Built Environment UCSI University Kuala Lumpur Malaysia
| | - N. Saravanakumar
- Department of Mechanical Engineering PSG Institute of Technology and Applied Research Coimbatore India
| | - A. Anto Dilip
- Department of Mechanical Engineering PSG Institute of Technology and Applied Research Coimbatore India
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16
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Bie H, Chen H, Shan L, Tan CY, Al-Furjan MSH, Ramesh S, Gong Y, Liu YF, Zhou RG, Yang W, Wang H. 3D Printing and Performance Study of Porous Artificial Bone Based on HA-ZrO 2-PVA Composites. Materials (Basel) 2023; 16:1107. [PMID: 36770115 PMCID: PMC9919799 DOI: 10.3390/ma16031107] [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] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 12/25/2022] [Revised: 01/10/2023] [Accepted: 01/13/2023] [Indexed: 06/18/2023]
Abstract
An ideal artificial bone implant should have similar mechanical properties and biocompatibility to natural bone, as well as an internal structure that facilitates stomatal penetration. In this work, 3D printing was used to fabricate and investigate artificial bone composites based on HA-ZrO2-PVA. The composites were proportionally configured using zirconia (ZrO2), hydroxyapatite (HA) and polyvinyl alcohol (PVA), where the ZrO2 played a toughening role and PVA solution served as a binder. In order to obtain the optimal 3D printing process parameters for the composites, a theoretical model of the extrusion process of the composites was first established, followed by the optimization of various parameters including the spray head internal diameter, extrusion pressure, extrusion speed, and extrusion line width. The results showed that, at the optimum parameters of a spray head diameter of 0.2 mm, extrusion pressure values ranging from 1-3 bar, a line spacing of 0.8-1.5 mm, and a spray head displacement range of 8-10 mm/s, a better structure of biological bone scaffolds could be obtained. The mechanical tests performed on the scaffolds showed that the elastic modulus of the artificial bone scaffolds reached about 174 MPa, which fulfilled the biomechanical requirements of human bone. According to scanning electron microscope observation of the scaffold sample, the porosity of the scaffold sample was close to 65%, which can well promote the growth of chondrocytes and angiogenesis. In addition, c5.18 chondrocytes were used to verify the biocompatibility of the composite materials, and the cell proliferation was increased by 100% when compared with that of the control group. The results showed that the composite has good biocompatibility.
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Affiliation(s)
- Hongling Bie
- Artificial Intelligence Applications College, Shanghai Urban Construction Vocational College, Shanghai 201415, China
| | - Honghao Chen
- School of Mechanical Engineering, Hangzhou Dianzi University, Hangzhou 310018, China
| | - Lijun Shan
- Center of Advanced Manufacturing and Material Processing, Department of Mechanical Engineering, Faculty of Engineering, Universiti Malaya, Kuala Lumpur 50603, Malaysia
| | - C. Y. Tan
- Center of Advanced Manufacturing and Material Processing, Department of Mechanical Engineering, Faculty of Engineering, Universiti Malaya, Kuala Lumpur 50603, Malaysia
| | - M. S. H. Al-Furjan
- State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
- Collaborative Innovation Center of High-End Laser Manufacturing Equipment (National “2011 Plan”), Zhejiang University of Technology, Hangzhou 310023, China
| | - S. Ramesh
- Center of Advanced Manufacturing and Material Processing, Department of Mechanical Engineering, Faculty of Engineering, Universiti Malaya, Kuala Lumpur 50603, Malaysia
| | - Youping Gong
- School of Mechanical Engineering, Hangzhou Dianzi University, Hangzhou 310018, China
| | - Y. F. Liu
- Collaborative Innovation Center of High-End Laser Manufacturing Equipment (National “2011 Plan”), Zhejiang University of Technology, Hangzhou 310023, China
- Key Laboratory of E&M, Zhejiang University of Technology, Ministry of Education & Zhejiang Province, Hangzhou 310023, China
| | - R. G. Zhou
- School of Mechanical Engineering, Hangzhou Dianzi University, Hangzhou 310018, China
- Wenzhou Institute of Hangzhou Dianzi University, 3-4/F, Building B, Zhejiang Yungu, Nanyang Avenue, Yaoxi Street, Hangzhou 325038, China
| | - Weibo Yang
- Zhejiang Guanlin Machinery Limited Company, Huzhou 313300, China
| | - Honghua Wang
- Zhejiang Guanlin Machinery Limited Company, Huzhou 313300, China
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17
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Aditya AMA, Ali MY, Ramesh S, Rahman ASA, Al Hazza M. Friction Welding of Similar and Dissimilar Materials: Analysis of Tensile Strength. Proceeding of 5th International Conference on Advances in Manufacturing and Materials Engineering 2023:343-350. [DOI: 10.1007/978-981-19-9509-5_46] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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18
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Nath G, Subrahmanyam M, Jayanthi R, Singh R, Ramesh S, Ahuja V. Recent advances in anaesthesia for intrauterine and foetal surgery. Indian J Anaesth 2023; 67:11-18. [PMID: 36970490 PMCID: PMC10034931 DOI: 10.4103/ija.ija_964_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 12/24/2022] [Accepted: 12/29/2022] [Indexed: 01/20/2023] Open
Abstract
Advances in prenatal diagnostic techniques have enabled early detection of potentially correctable foetal anomalies. Here, we summarise recent developments in anaesthesia for foetal surgery. Types of foetal surgery include minimally invasive, open mid-gestational and ex-utero intrapartum treatment (EXIT) procedures. Foetoscopic surgery avoids hysterotomy, with risk of uterine dehiscence, preserving the possibility of subsequent vaginal delivery. Minimally invasive procedures are performed under local or regional anaesthesia; open or EXIT procedures are usually done under general anaesthesia. Requirements include maintenance of uteroplacental blood flow, and uterine relaxation to prevent placental separation and premature labour. Foetal requirements include monitoring of well-being, providing analgesia and immobility. EXIT procedures require maintenance of placental circulation till the airway is secured, requiring multidisciplinary involvement. Here, the uterine tone must return after baby delivery to prevent major maternal haemorrhage. The anaesthesiologist plays a crucial role in maintaining maternal and foetal homeostasis and optimising surgical conditions.
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19
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Shan L, Tan CY, Shen X, Ramesh S, Kolahchi R, Hajmohammad MH, Rajak DK. Creep Behavior of A356 Aluminum Alloy Reinforced with Multi-Walled Carbon Nanotubes by Stir Casting. Materials (Basel) 2022; 15:ma15248959. [PMID: 36556764 PMCID: PMC9786553 DOI: 10.3390/ma15248959] [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] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/14/2022] [Revised: 12/06/2022] [Accepted: 12/08/2022] [Indexed: 06/12/2023]
Abstract
Lightweight aluminum alloy components are often used to manufacture a variety of engineering components in many industries. In recent years, researchers have studied the effect of improving the mechanical properties of metal alloys by incorporating nano-carbon into its structure. In this study, the effect of the addition of 0.2, 0.5, and 1 wt% of multi-walled carbon nanotubes (MWCNTs) on the stress-strain behavior and creep phenomenon of an A356 aluminum alloy were studied. The effect of nickel coating on 0.2 wt% MWCNTs was also investigated. Samples were prepared using the stir-casting method. The results revealed that the grain size became finer when MWCNT nano-particulates were introduced. Although the MWCNTs were distributed homogeneously in the A356 matrix, as confirmed by FESEM analysis, there were some agglomerations observed in a specific area with dimensions smaller than 100 nm. Nevertheless, the addition of MWCNTs was found to be beneficial in enhancing the hardness of alloys containing 0.2 wt%, 0.2 wt% nickel-coated, 0.5 wt%, and 1 wt% MWCNTs by 9%, 24%, 32%, and 15%, respectively, as compared with the unreinforced A345 matrix. It was also found that the 0.5 wt% MWCNT-A356 matrix exhibited an improvement in the creep lifetime by more than two orders of magnitude.
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Affiliation(s)
- L. Shan
- Department of Mechanical Engineering, Faculty of Engineering, Universiti Malaya, Kuala Lumpur 50603, Malaysia
| | - C. Y. Tan
- Department of Mechanical Engineering, Faculty of Engineering, Universiti Malaya, Kuala Lumpur 50603, Malaysia
- Centre of Advanced Manufacturing and Materials Processing (AMMP), Faculty of Engineering, University Malaya, Kuala Lumpur 50603, Malaysia
| | - X. Shen
- State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
| | - S. Ramesh
- Department of Mechanical Engineering, Faculty of Engineering, Universiti Malaya, Kuala Lumpur 50603, Malaysia
- Centre of Advanced Manufacturing and Materials Processing (AMMP), Faculty of Engineering, University Malaya, Kuala Lumpur 50603, Malaysia
- Huanghe Jiaotong University, Zhengzhou 454950, China
| | - R. Kolahchi
- School of Materials Science and Engineering, State Key Laboratory of Silicon Materials, Zhejiang University, Hangzhou 310027, China
| | - M. H. Hajmohammad
- Department of Mechanical Engineering, Imam Hossein University, Tehran 1698715461, Iran
| | - D. K. Rajak
- Indian Institute of Technology (ISM), Dhanbad 826004, JH, India
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20
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Dolezal JM, Srisuwananukorn A, Karpeyev D, Ramesh S, Kochanny S, Cody B, Mansfield AS, Rakshit S, Bansal R, Bois MC, Bungum AO, Schulte JJ, Vokes EE, Garassino MC, Husain AN, Pearson AT. Uncertainty-informed deep learning models enable high-confidence predictions for digital histopathology. Nat Commun 2022; 13:6572. [PMID: 36323656 PMCID: PMC9630455 DOI: 10.1038/s41467-022-34025-x] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2022] [Accepted: 10/07/2022] [Indexed: 11/06/2022] Open
Abstract
A model's ability to express its own predictive uncertainty is an essential attribute for maintaining clinical user confidence as computational biomarkers are deployed into real-world medical settings. In the domain of cancer digital histopathology, we describe a clinically-oriented approach to uncertainty quantification for whole-slide images, estimating uncertainty using dropout and calculating thresholds on training data to establish cutoffs for low- and high-confidence predictions. We train models to identify lung adenocarcinoma vs. squamous cell carcinoma and show that high-confidence predictions outperform predictions without uncertainty, in both cross-validation and testing on two large external datasets spanning multiple institutions. Our testing strategy closely approximates real-world application, with predictions generated on unsupervised, unannotated slides using predetermined thresholds. Furthermore, we show that uncertainty thresholding remains reliable in the setting of domain shift, with accurate high-confidence predictions of adenocarcinoma vs. squamous cell carcinoma for out-of-distribution, non-lung cancer cohorts.
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Affiliation(s)
- James M Dolezal
- Section of Hematology/Oncology, Department of Medicine, University of Chicago Medical Center, Chicago, IL, USA
| | | | | | - Siddhi Ramesh
- Section of Hematology/Oncology, Department of Medicine, University of Chicago Medical Center, Chicago, IL, USA
| | - Sara Kochanny
- Section of Hematology/Oncology, Department of Medicine, University of Chicago Medical Center, Chicago, IL, USA
| | - Brittany Cody
- Department of Pathology, University of Chicago, Chicago, IL, USA
| | | | - Sagar Rakshit
- Division of Medical Oncology, Mayo Clinic, Rochester, MN, USA
| | - Radhika Bansal
- Division of Medical Oncology, Mayo Clinic, Rochester, MN, USA
| | - Melanie C Bois
- Department of Laboratory Medicine and Pathology, Mayo Clinic, Rochester, MN, USA
| | - Aaron O Bungum
- Divisions of Pulmonary Medicine and Critical Care, Mayo Clinic, Rochester, MN, USA
| | - Jefree J Schulte
- Department of Pathology and Laboratory Medicine, University of Wisconsin at Madison, Madison, WN, USA
| | - Everett E Vokes
- Section of Hematology/Oncology, Department of Medicine, University of Chicago Medical Center, Chicago, IL, USA
| | - Marina Chiara Garassino
- Section of Hematology/Oncology, Department of Medicine, University of Chicago Medical Center, Chicago, IL, USA
| | - Aliya N Husain
- Department of Pathology, University of Chicago, Chicago, IL, USA
| | - Alexander T Pearson
- Section of Hematology/Oncology, Department of Medicine, University of Chicago Medical Center, Chicago, IL, USA.
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Wang J, Zhang D, Li Z, Wang Q, Wang H, Woo H, Ramesh S, Shao Y, Wang B. Constructing VS4/Nb2O5/GO composite to facilitate rapid Na+ transport with internal and external synergy. Electrochim Acta 2022. [DOI: 10.1016/j.electacta.2022.141600] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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Anilkumar C, Sunitha NC, Devate NB, Ramesh S. Advances in integrated genomic selection for rapid genetic gain in crop improvement: a review. Planta 2022; 256:87. [PMID: 36149531 DOI: 10.1007/s00425-022-03996-y] [Citation(s) in RCA: 2] [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] [Subscribe] [Scholar Register] [Received: 11/20/2021] [Accepted: 09/11/2022] [Indexed: 06/16/2023]
Abstract
Genomic selection and its importance in crop breeding. Integration of GS with new breeding tools and developing SOP for GS to achieve maximum genetic gain with low cost and time. The success of conventional breeding approaches is not sufficient to meet the demand of a growing population for nutritious food and other plant-based products. Whereas, marker assisted selection (MAS) is not efficient in capturing all the favorable alleles responsible for economic traits in the process of crop improvement. Genomic selection (GS) developed in livestock breeding and then adapted to plant breeding promised to overcome the drawbacks of MAS and significantly improve complicated traits controlled by gene/QTL with small effects. Large-scale deployment of GS in important crops, as well as simulation studies in a variety of contexts, addressed G × E interaction effects and non-additive effects, as well as lowering breeding costs and time. The current study provides a complete overview of genomic selection, its process, and importance in modern plant breeding, along with insights into its application. GS has been implemented in the improvement of complex traits including tolerance to biotic and abiotic stresses. Furthermore, this review hypothesises that using GS in conjunction with other crop improvement platforms accelerates the breeding process to increase genetic gain. The objective of this review is to highlight the development of an appropriate GS model, the global open source network for GS, and trans-disciplinary approaches for effective accelerated crop improvement. The current study focused on the application of data science, including machine learning and deep learning tools, to enhance the accuracy of prediction models. Present study emphasizes on developing plant breeding strategies centered on GS combined with routine conventional breeding principles by developing GS-SOP to achieve enhanced genetic gain.
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Affiliation(s)
- C Anilkumar
- ICAR-National Rice Research Institute, Cuttack, India
| | - N C Sunitha
- University of Agricultural Sciences, Bangalore, India
| | | | - S Ramesh
- University of Agricultural Sciences, Bangalore, India.
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Nasuha S, Pershaanaa M, Bashir S, Ramesh K, Ramesh S. Manganese-doped zinc sulfide binary nanostructures as binder-free electrode materials for supercapattery. J Solid State Electrochem 2022. [DOI: 10.1007/s10008-022-05218-7] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
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24
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Qureshi SS, Shah V, Nizamuddin S, Mubarak N, Karri RR, Dehghani MH, Ramesh S, Khalid M, Rahman ME. Microwave-assisted synthesis of carbon nanotubes for the removal of toxic cationic dyes from textile wastewater. J Mol Liq 2022. [DOI: 10.1016/j.molliq.2022.119045] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/20/2023]
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25
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Rafidi N, Bashir S, Hina M, Gunalan S, Ramesh S, Ramesh K. Renewable and soft dynamic supercapacitors based on poly (acrylamide) hydrogel electrolytes and porous carbon electrodes. Polym Bull (Berl) 2022. [DOI: 10.1007/s00289-021-04032-x] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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26
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LAU L, Weibe N, Ramesh S, Ahmed S, Tonelli M, Thorand B, Bello A. POS-577 SEX HORMONES IN MORTALITY AND OTHER ADVERSE HEALTH OUTCOMES AMONG ADULTS UNDERGOING HEMODIALYSIS – A PROSPECTIVE STUDY. Kidney Int Rep 2022. [DOI: 10.1016/j.ekir.2022.01.609] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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27
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Sandhya CS, Ramesh S, Prasad NT, Murthy KNVV, Gobichandhru D, Murugesan M, Vedachalam N, Ramadass GA. Design and Development of Human Metabolic Simulator for a Deepwater Manned Submersible. CURR SCI INDIA 2022. [DOI: 10.18520/cs/v122/i2/187-194] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Mini MM, Tinky BC, Fathima SCR, Aswathi K, Ramachandran S, Girija KL, Ramesh S. Evaluation of orofacial symptoms and oral health-related quality of life among COVID-19 patients attending a tertiary hospital in Thiruvananthapuram: A cross-sectional study. J Indian Acad Oral Med Radiol 2022. [DOI: 10.4103/jiaomr.jiaomr_110_22] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022] Open
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Ramesh S, Chokkara S, Shen T, Major A, Volchenboum SL, Mayampurath A, Applebaum MA. Applications of Artificial Intelligence in Pediatric Oncology: A Systematic Review. JCO Clin Cancer Inform 2021; 5:1208-1219. [PMID: 34910588 DOI: 10.1200/cci.21.00102] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
PURPOSE There is a need for an improved understanding of clinical and biologic risk factors in pediatric cancer to improve patient outcomes. Machine learning (ML) represents the application of computational inference from advanced statistical methods that can be applied to increasing amount of data available for study in pediatric oncology. The goal of this systematic review was to systematically characterize the state of ML in pediatric oncology and highlight advances and opportunities in the field. METHODS We conducted a systematic review of the Embase, Scopus, and MEDLINE databases for applications of ML in pediatric oncology. Query results from all three databases were aggregated and duplicate studies were removed. RESULTS A total of 42 unique articles that examined the applications of ML in pediatric oncology met inclusion criteria for review. We identified 20 studies of CNS tumors, 13 of solid tumors, and nine of leukemia. ML tasks included classification, prediction of treatment response, and dose optimization with a variety of methods being used including neural network, k-nearest neighbor, random forest, naive Bayes, and support vector machines. Strengths of the identified studies included matching or outperforming physician comparators via automated analysis and predicting therapeutic response. Common limitations included significant heterogeneity in reporting standards, clinical applicability, small sample sizes, and missing external validation cohorts. CONCLUSION We identified areas where ML can enhance clinical care in ways that may not otherwise be achievable. Although ML promises enormous potential in improving diagnostics, decision making, and monitoring for children with cancer, the field remains in early stages and future work will be aided by standards and guidelines to ensure rigorous methodologic design and maximizing clinical utility.
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Affiliation(s)
- Siddhi Ramesh
- Pritzker School of Medicine, University of Chicago, Chicago, IL
| | - Sukarn Chokkara
- Pritzker School of Medicine, University of Chicago, Chicago, IL
| | - Timothy Shen
- Pritzker School of Medicine, University of Chicago, Chicago, IL
| | - Ajay Major
- Department of Medicine, Section of Hematology/Oncology, University of Chicago, Chicago, IL
| | - Samuel L Volchenboum
- Department of Pediatrics, Section of Hematology/Oncology, University of Chicago, Chicago, IL
| | - Anoop Mayampurath
- Department of Pediatrics, Section of Hematology/Oncology, University of Chicago, Chicago, IL
| | - Mark A Applebaum
- Department of Pediatrics, Section of Hematology/Oncology, University of Chicago, Chicago, IL
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Ramesh S, Amuthavalli A, Balaguru M, Saravanan D. Crystal Structure of 1-(4-(5,6-Dihydropyridazin-1(4H)-yl)Phenyl)-N-Methylmethanesulfonamide. CRYSTALLOGR REP+ 2021. [DOI: 10.1134/s1063774521070130] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Ajaykumar H, Ramesh S, Sunitha NC, Anilkumar C. Assessment of natural DNA methylation variation and its association with economically important traits in dolichos bean (Lablab purpureus L. Var. Lignosus) using AMP-PCR assay. J Appl Genet 2021; 62:571-583. [PMID: 34247322 DOI: 10.1007/s13353-021-00648-x] [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: 10/13/2020] [Revised: 05/30/2021] [Accepted: 06/20/2021] [Indexed: 12/29/2022]
Abstract
As a prelude to exploit DNA methylation-induced variation, we hypothesized the existence of substantial natural DNA methylation variation and its association with economically important traits in dolichos bean, and tested it using amplified methylation polymorphism-polymerase chain reaction (AMP-PCR) assay. DNA methylation patterns such as internal, external, full and non-methylation were amplified in a set of 64 genotypes using 26 customized randomly amplified polymorphic DNA (RAPD) primers containing 5'CCGG3' sequence. The 64 genotypes included 60 germplasm accessions (GA), two advanced breeding lines (ABLs) and two released varieties. The ABLs and released varieties are referred to as improved germplasm accessions (IGA) in this study. The association of DNA methylation patterns with economically important traits such as days to 50% flowering, raceme length, fresh pods plant-1, fresh pod yield plant-1 and 100-fresh seed weight was explored. At least 50 genotypes were polymorphic for DNA methylation patterns at 10 loci generated by seven of the 26 RAPD primers. The GA and IGA differed significantly for total, full and external methylation and the frequency of methylation was higher in GA compared to that in IGA. The genotypes with external methylation produced longer racemes than those with full, internal and non-methylation in that order at polymorphic RAPD-11-242 locus. High pod yielding genotypes had significantly lower frequency of full methylation than low yielding ones. On the contrary, the genotypes that produced heavier fresh seeds harboured higher frequencies of total and externally methylated loci than those that produced lighter fresh seeds.
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Affiliation(s)
- H Ajaykumar
- Department of Genetics and Plant Breeding, College of Agriculture, University of Agricultural Sciences, Bangalore, India
| | - S Ramesh
- Department of Genetics and Plant Breeding, College of Agriculture, University of Agricultural Sciences, Bangalore, India.
| | - N C Sunitha
- Department of Genetics and Plant Breeding, College of Agriculture, University of Agricultural Sciences, Bangalore, India
| | - C Anilkumar
- Department of Genetics and Plant Breeding, College of Agriculture, University of Agricultural Sciences, Bangalore, India.,ICAR-National Rice Research Institute, Cuttack, India
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Mayampurath A, Ramesh S, Michael D, Liu L, Feinberg N, Granger M, Naranjo A, Cohn SL, Volchenboum SL, Applebaum MA. Predicting Response to Chemotherapy in Patients With Newly Diagnosed High-Risk Neuroblastoma: A Report From the International Neuroblastoma Risk Group. JCO Clin Cancer Inform 2021; 5:1181-1188. [PMID: 34882497 PMCID: PMC8812615 DOI: 10.1200/cci.21.00103] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2021] [Revised: 08/22/2021] [Accepted: 10/25/2021] [Indexed: 11/20/2022] Open
Abstract
PURPOSE Metaiodobenzylguanidine (MIBG) scans are a radionucleotide imaging modality that undergo Curie scoring to semiquantitatively assess neuroblastoma burden, which can be used as a marker of therapy response. We hypothesized that a convolutional neural network (CNN) could be developed that uses diagnostic MIBG scans to predict response to induction chemotherapy. METHODS We analyzed MIBG scans housed in the International Neuroblastoma Risk Group Data Commons from patients enrolled in the Children's Oncology Group high-risk neuroblastoma study ANBL12P1. The primary outcome was response to upfront chemotherapy, defined as a Curie score ≤ 2 after four cycles of induction chemotherapy. We derived and validated a CNN using two-dimensional whole-body MIBG scans from diagnosis and evaluated model performance using area under the receiver operating characteristic curve (AUC). We also developed a clinical classification model to predict response on the basis of age, stage, and MYCN amplification. RESULTS Among 103 patients with high-risk neuroblastoma included in the final cohort, 67 (65%) were responders. Performance in predicting response to upfront chemotherapy was equivalent using the CNN and the clinical model. Class-activation heatmaps verified that the CNN used areas of disease within the MIBG scans to make predictions. Furthermore, integrating predictions using a geometric mean approach improved detection of responders to upfront chemotherapy (geometric mean AUC 0.73 v CNN AUC 0.63, P < .05; v clinical model AUC 0.65, P < .05). CONCLUSION We demonstrate feasibility in using machine learning of diagnostic MIBG scans to predict response to induction chemotherapy for patients with high-risk neuroblastoma. We highlight improvements when clinical risk factors are also integrated, laying the foundation for using a multimodal approach to guiding treatment decisions for patients with high-risk neuroblastoma.
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Affiliation(s)
| | - Siddhi Ramesh
- Pritzker School of Medicine, University of Chicago, Chicago, IL
| | - Diana Michael
- Department of Pediatrics, University of Chicago, Chicago, IL
| | - Liu Liu
- Department of Radiology, University of Chicago, Chicago, IL
| | | | | | - Arlene Naranjo
- Children's Oncology Group Statistics and Data Center, Department of Biostatistics, University of Florida, Gainesville, FL
| | - Susan L. Cohn
- Department of Pediatrics, University of Chicago, Chicago, IL
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Sunitha NC, Gangappa E, Gowda RPV, Ramesh S, Biradar S, Swamy D, Hemareddy HB. Discovery of genomic regions associated with resistance to late wilt disease caused by Harpophora maydis (Samra, Sabet and Hing) in maize (Zea mays L.). J Appl Genet 2021; 63:185-197. [PMID: 34841470 DOI: 10.1007/s13353-021-00672-x] [Citation(s) in RCA: 4] [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] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/11/2021] [Revised: 11/17/2021] [Accepted: 11/23/2021] [Indexed: 11/24/2022]
Abstract
Late wilt disease (LWD) caused by Harpophora maydis (Samra, Sabet and Hing) is emerging as major production constraint in maize across the world. As a prelude to develop maize hybrid resistance to LWD, genetic basis of resistance was investigated. Two F2:3 mapping populations (derived from CV156670 × 414-33 (P-1) and CV156670 × CV143587 (P-2)) were challenged with LWD at two locations (Kallinayakanahalli and Muppadighatta) during 2017 post-rainy season. A wider range of LWD scores was observed at both locations in both the populations. LWD response was influenced by significant genotype × location interaction. Six and 56 F2:3 progeny families showed resistance level better than resistant parent. A total of 150 and 199 polymorphic single nucleotide polymorphism markers were used to genotype P-1 and P-2, respectively. Inclusive composite interval mapping was performed to detect significant Quantitative Trait Loci (QTL), QTL × QTL, QTL × location interaction effects. Three major and four minor QTL controlling LWD resistance were detected on chromosome-1. The position and effect of the QTL varied with the location. Significant di-QTL interactions involving QTL (with significant and/or non-significant effects) located within and between all the ten chromosomes were detected. Five of the seven detected QTL showed significant QTL × location interaction. Though two major QTL (q-lw-1.5 and q-lw-1.6) with lower Q×L interaction effects could be considered as stable, their phenotypic variance is not large enough to deploy them in Marker Assisted Selection (MAS). However, these QTL are of paramount importance in accumulating positive alleles for LWD resistance breeding.
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Affiliation(s)
- N C Sunitha
- Department of Genetics and Plant Breeding, College of Agriculture, University of Agricultural Sciences, Gandhi Krishi Vignana Kendra, Bengaluru, 560065, India
| | - E Gangappa
- Department of Genetics and Plant Breeding, College of Agriculture, University of Agricultural Sciences, Gandhi Krishi Vignana Kendra, Bengaluru, 560065, India
| | | | - S Ramesh
- Department of Genetics and Plant Breeding, College of Agriculture, University of Agricultural Sciences, Gandhi Krishi Vignana Kendra, Bengaluru, 560065, India.
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Shankar G, Deepak JG, Jadhav V, Venkatesh K, Kini U, Ramesh S. Long-term outcomes in children with Hirschsprung's disease and transition zone bowel pull-through: impact of surgical techniques and role for conservative approach. Pediatr Surg Int 2021; 37:1555-1561. [PMID: 34351443 DOI: 10.1007/s00383-021-04974-3] [Citation(s) in RCA: 2] [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] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Accepted: 07/27/2021] [Indexed: 10/20/2022]
Abstract
PURPOSE Presence of transition zone (TZ) in the pulled colon can impact the outcome of surgery in children with Hirschsprung's disease. There is a wide variation in terminology used to define TZ and its management. We present our series of managing 11 such children with considerations for conservative management. METHODS Eleven of 114 children operated for Hirschsprung's disease had features of TZ on the 4-quadrant doughnut assessment of proximal anastomosing margin. They were followed up for development of obstructive symptoms, failure of pull-through procedure or bowel-related complications. Intervention done were observation with laxatives, dilatation, Botox injection and redo pull-through. RESULTS Of the 11 children, 6 underwent Duhamel's procedure and 5, transanal endorectal pull-through (TERP). Features identified on HPE were presence of hypertrophic nerve bundles involving 2 or 3 quadrants in the circumferential doughnut biopsy of proximal anastomosing margin. Observed symptoms included constipation, enterocolitis, increased bowel frequency and soiling. Intervention done were use of laxatives with bowel management program in six and Botox injections in four. Only one child with TZ in 3 quadrants required redo surgery. Mean follow-up was 5.2 years with resolution of symptoms in most. CONCLUSION This study highlights the role of conservative management with good outcomes in children with TZ bowel pull-through having hypertrophic nerve fibers and normal ganglion pattern. Children who underwent Duhamel's procedure had little impact with the presence of TZ at anastomotic margin and majority of those undergoing TERP benefitted from Botox injection. Conservative management can be attempted successfully to prevent redo surgical interventions as they can lead to poorer outcomes. Only those children not responding to conservative measures need to be planned for revision surgery.
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Affiliation(s)
- Gowri Shankar
- Department of Paediatric Surgery, Indira Gandhi Institute of Child Health Hospital, South Hospital Complex, Near NIMHANS, Hombegowda Nagar, Bangalore, 560029, India.
| | - J G Deepak
- Department of Paediatric Surgery, Indira Gandhi Institute of Child Health Hospital, South Hospital Complex, Near NIMHANS, Hombegowda Nagar, Bangalore, 560029, India
| | - Vinay Jadhav
- Department of Paediatric Surgery, Indira Gandhi Institute of Child Health Hospital, South Hospital Complex, Near NIMHANS, Hombegowda Nagar, Bangalore, 560029, India
| | - K Venkatesh
- Department of Paediatric Surgery, Indira Gandhi Institute of Child Health Hospital, South Hospital Complex, Near NIMHANS, Hombegowda Nagar, Bangalore, 560029, India
| | - Usha Kini
- Translational Research Laboratory for Gut Motility Disorders, St. John's Medical College, Bangalore, India
| | - S Ramesh
- Department of Paediatric Surgery, Indira Gandhi Institute of Child Health Hospital, South Hospital Complex, Near NIMHANS, Hombegowda Nagar, Bangalore, 560029, India
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Bashir S, Hasan K, Hina M, Ali Soomro R, Mujtaba M, Ramesh S, Ramesh K, Duraisamy N, Manikam R. Conducting polymer/graphene hydrogel electrodes based aqueous smart Supercapacitors: A review and future prospects. J Electroanal Chem (Lausanne) 2021. [DOI: 10.1016/j.jelechem.2021.115626] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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Ramesh S, Liakapoulou A, Celebi P, Zacharaki LM, Watts S, Palamaras I. COVID-19 pandemic-related impact on two-week wait window for clinic visits in dermatology departments-results of pre-visit image referrals. Dermatol Online J 2021; 27. [PMID: 34391339 DOI: 10.5070/d327754377] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Accepted: 08/09/2021] [Indexed: 11/08/2022] Open
Affiliation(s)
- S Ramesh
- Department of Dermatology, Barnet and Chase Farm hospital, Royal Free NHS trust, London.
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Kharat B, Naganathappa M, Ramesh S, Chaudhari A. Hydrogen-bonded cluster of nitroxyl: many-body analysis and spectroscopic characterization. Struct Chem 2021. [DOI: 10.1007/s11224-020-01686-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022]
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Ramesh S, Michael D, Liu L, Feinberg N, Granger M, Naranjo A, Cohn SL, Volchenboum SL, Mayampurath A, Applebaum MA. Predicting response to chemotherapy in neuroblastoma using deep learning: A report from the International Neuroblastoma Risk Group. J Clin Oncol 2021. [DOI: 10.1200/jco.2021.39.15_suppl.10039] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
10039 Background: Metaiodobenzylguanidine (MIBG) scans are a radionucleotide imaging modality used to evaluate neuroblastoma stage at diagnosis and also determine disease response following therapy. Curie scoring is used to semi-quantitatively assess disease burden from an MIBG scan on a scale from none (0) to widespread throughout the body (30). While a Curie score ≤2 after six cycles of induction chemotherapy has been shown to be prognostic of outcome, there is no established correlation between diagnostic Curie score and outcome. Deep learning models, such as convolutional neural networks (CNN), have been shown to learn generalizable patterns within images for successful classification of metastases and detection of multiple adult cancers. We hypothesized a CNN could be developed to predict response to induction chemotherapy, a proxy for outcome, using diagnostic MIBG scans. Methods: DICOM MIBG scans and associated clinical data from a Children’s Oncology Group (COG) pilot study for children diagnosed with high-risk neuroblastoma (ANBL12P1; NCT1798004) were deidentified and linked to clinical data by the Pediatric Cancer Data Commons and obtained from the International Neuroblastoma Risk Group Data Commons. Patients were defined as having a poor response to induction chemotherapy if their Curie score after four cycles of induction chemotherapy was ≥2. An independent external validation cohort was comprised of 29 images from 26 high-risk patients treated at the University of Chicago with clinically-annotated diagnostic and post-cycle six induction DICOM MIBG scans. The CNN was trained using 2D whole body MIBG scans obtained at diagnosis. We developed the CNN using a transfer learning approach using the Xception architecture as the base layer. Hyperparameter optimization was performed using an 80%-20% train-validation strategy. Model performance was evaluated using area under the receiver operating characteristic curve (AUROC). Results: Among 146 patients with high-risk neuroblastoma enrolled on ANBL12P1, 104 had available diagnostic and end-induction MIBG scans. There were no differences in clinical or biological characteristics between included and excluded patients. The base model CNN was able to predict which patients had a poor response to induction chemotherapy with an AUROC of 0.72 in the validation set from the ANBL12P1 cohort. Additionally, the CNN was able to predict patient response to therapy with an AUROC of 0.64 in an independent external dataset from University of Chicago. Conclusions: Our study suggests it is feasible to apply machine learning of diagnostic MIBG scans to predict response to chemotherapy for high-risk neuroblastoma patients. Given these promising results, further work to improve AUROC and performance within larger datasets is ongoing.
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Affiliation(s)
- Siddhi Ramesh
- University of Chicago Pritzker School of Medicine (Chicago, IL), Chicago, IL
| | | | - Liu Liu
- University of Chicago Department of Medicine, Chicago, IL
| | | | | | - Arlene Naranjo
- Children's Oncology Group Statistics and Data Center, University of Florida, Gainesville, FL
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Farhana N, Bashir S, Ramesh S, Ramesh K. Augmentation of dye-sensitized solar cell photovoltaic conversion efficiency via incorporation of terpolymer Poly(vinyl butyral-co-vinyl alcohol-co-vinyl acetate) based gel polymer electrolytes. POLYMER 2021. [DOI: 10.1016/j.polymer.2021.123713] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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Ramesh S, Nazeer SS, Thomas S, Vivek V, Jayasree RS. Optical diagnosis of oral lichen planus: A clinical study on the use of autofluorescence spectroscopy combined with multivariate analysis. Spectrochim Acta A Mol Biomol Spectrosc 2021; 248:119240. [PMID: 33310275 DOI: 10.1016/j.saa.2020.119240] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [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: 08/31/2020] [Revised: 11/03/2020] [Accepted: 11/14/2020] [Indexed: 06/12/2023]
Abstract
Oral lichen planus (OLP) is a chronic mucocutaneous inflammatory condition of stratified squamous epithelia. OLP is a potentially malignant condition in oral mucosa. Patients with OLP have an increased risk of developing squamous cell carcinoma. Therefore an early and accurate diagnosis is necessary to avoid further damage to the oral mucosa. Biopsy followed by histopathological examination is the gold standard for the diagnosis of oral mucosal lesions including OLP. But this invasive procedure is traumatic and time consuming with limited statistical confidence level. Autofluorescence spectroscopy (AFS) has recently emerged as a potential tool to evaluate the biochemical changes associated with oral cavity disorders. In this study, we used AFS to differentiate the oral cavity tissue of 20 OLP patients from that of 16 normal volunteers. Spectra from oral mucosa were acquired at 280, 320 and 410 nm excitation wavelengths which correspond to the excitation energy of major endogenous fluorophores. Normalized spectral data at 320 nm excitation showed significant increase in the intensity of collagen peak for OLP. Optical redox ratio and total hemoglobin concentration estimated from the spectral data revealed significant increase and decrease respectively in OLP and normal patients. Principal component analysis followed by linear discriminant analysis (PCA-LDA) provided sensitivity and specificity of 71 and 80%, 80 and 90%, and 72 and 75% respectively for 280, 320 and 410 nm excited spectral datasets. Meanwhile, partial least square discriminant analysis (PLS-DA) provided sensitivity and specificity of 69 and 77%, 78 and 91% and 73 and 78.13% respectively for 280, 320 and 410 nm excited spectral datasets. From the results, it is concluded that AFS is an efficient tool for the non invasive diagnosis of OLP, with 320 nm light identified as the best wavelength for excitation.
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Affiliation(s)
- S Ramesh
- Department of Oral Medicine and Radiology, PMS College of Dental Sciences and Research, Trivandrum, Kerala, India; Department of Oral Medicine and Radiology, Government Dental College, Trivandrum, Kerala, India
| | - Shaiju S Nazeer
- Department of Chemistry, Indian Institute of Space Sciences and Technology, Trivandrum, Kerala, India; Division of Biophotonics and Imaging, Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Kerala, India
| | - Sunila Thomas
- Department of Oral Medicine and Radiology, PMS College of Dental Sciences and Research, Trivandrum, Kerala, India
| | - V Vivek
- Department of Oral Medicine and Radiology, PMS College of Dental Sciences and Research, Trivandrum, Kerala, India
| | - Ramapurath S Jayasree
- Division of Biophotonics and Imaging, Biomedical Technology Wing, Sree Chitra Tirunal Institute for Medical Sciences and Technology, Kerala, India.
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Syafiq A, Vengadaesvaran B, Rahim NA, Pandey AK, Bushroa AR, Ramesh K, Ramesh S. Synthesis of a Hybrid Self-Cleaning Coating System for Glass. Composite Materials 2021:79-98. [DOI: 10.1201/9781003080633-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 09/02/2023]
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Dumanski S, Anderson T, Kalenga C, Chang D, Ramesh S, Holroyd-Leduc J, Nerenberg K, Sola D, Pajevic M, Ahmed S. Parity and cardiovascular disease risk in women with chronic kidney disease. Can J Cardiol 2021. [DOI: 10.1016/j.cjca.2020.02.037] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/22/2022] Open
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Ramesh S, Sivakumar V. Influence of knowledge management system on customer satisfaction index - an application study of CRM by offering performance enhancement for transmission. IJKMS 2021. [DOI: 10.1504/ijkms.2021.10040568] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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45
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Ramesh S, Sivakumar V. Influence of knowledge management system on customer satisfaction index - an application study of CRM by offering performance enhancement for transmission. IJKMS 2021. [DOI: 10.1504/ijkms.2021.118347] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Kumar A, Manikandan R, Magesh S, Patan R, Ramesh S, Gupta D. Image analysis and data processing for COVID-19. Data Science for COVID-19 2021. [PMCID: PMC8138042 DOI: 10.1016/b978-0-12-824536-1.00035-6] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Indexed: 10/31/2022]
Abstract
COVID-19 is a deadly disease caused by the severe acute respiratory syndrome coronavirus (SARS-CoV-2). It was first discovered by variations in the respirational and immune systems of a patient who died of a severe acute respiratory syndrome. The first country heavily affected by coronavirus was China. The first case was detected in Wuhan city, China. This virus spreads rapidly from person to person. Based on laboratory tests for coronavirus disease in humans, it is suspected that bats are the natural source of spread of large varieties of virus. The two major viruses, SARS-CoV and Middle East respiratory syndrome coronavirus, originated from the bat; it caused an unexpected disease outbreak in the 21st century throughout the world. Researchers and doctors have investigated COVID in cadavers. The virus was detected in lung, trachea/bronchus, stomach, small intestine, distal convoluted renal tubule, sweat gland, pancreas, adrenal gland, parathyroid, pituitary, cerebrum, and liver. However, it was not noted in bone marrow, heart, aorta, cerebellum, thyroid, testis, esophagus, spleen, lymph node, ovary, muscle, or uterus. This chapter briefly discusses image analysis and data processing used to accelerate COVID-19 detection and support the efforts of researchers and physician to help infected people and break the chain of disease from person to person.
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Hina M, Bashir S, Kamran K, Ramesh S, Ramesh K. Synthesis and characterization of self-healable poly (acrylamide) hydrogel electrolytes and their application in fabrication of aqueous supercapacitors. POLYMER 2020. [DOI: 10.1016/j.polymer.2020.123020] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
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48
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Iqbal J, Numan A, Omaish Ansari M, Jafer R, Jagadish PR, Bashir S, Hasan PMZ, Bilgrami AL, Mohamad S, Ramesh K, Ramesh S. Cobalt Oxide Nanograins and Silver Nanoparticles Decorated Fibrous Polyaniline Nanocomposite as Battery-Type Electrode for High Performance Supercapattery. Polymers (Basel) 2020; 12:polym12122816. [PMID: 33261072 PMCID: PMC7768478 DOI: 10.3390/polym12122816] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [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: 10/20/2020] [Revised: 11/17/2020] [Accepted: 11/23/2020] [Indexed: 11/16/2022] Open
Abstract
In this study, silver (Ag) and cobalt oxide (Co3O4) decorated polyaniline (PANI) fibers were prepared by the combination of in-situ aniline oxidative polymerization and the hydrothermal methodology. The morphology of the prepared Ag/Co3O4@PANI ternary nanocomposite was studied by scanning electron microscopy and transmission electron microscopy, while the structural studies were carried out by X-ray diffraction and X-ray photoelectron spectroscopy. The morphological characterization revealed fibrous shaped PANI, coated with Ag and Co3O4 nanograins, while the structural studies revealed high purity, good crystallinity, and slight interactions among the constituents of the Ag/Co3O4@PANI ternary nanocomposite. The electrochemical performance studies revealed the enhanced performance of the Ag/Co3O4@PANI nanocomposite due to the synergistic/additional effect of Ag, Co3O4 and PANI compared to pure PANI and Co3O4@PANI. The addition of the Ag and Co3O4 provided an extended site for faradaic reactions leading to the high specific capacity. The Ag/Co3O4@PANI ternary nanocomposite exhibited an excellent specific capacity of 262.62 C g−1 at a scan rate of 3 mV s−1. The maximum energy and power density were found to be 14.01 Wh kg−1 and 165.00 W kg−1, respectively. The cyclic stability of supercapattery (Ag/Co3O4@PANI//activated carbon) consisting of a battery type electrode demonstrated a gradual increase in specific capacity with a continuous charge–discharge cycle until ~1000 cycles, then remained stable until 2500 cycles and later started decreasing, thereby showing the cyclic stability of 121.03% of its initial value after 3500 cycles.
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Affiliation(s)
- Javed Iqbal
- Center of Nanotechnology, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (J.I.); (P.M.Z.H.)
- Department of Chemistry, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia;
| | - Arshid Numan
- State Key Laboratory of ASIC and System, SIST, Fudan University, Shanghai 200433, China;
- Graphene & Advanced 2D Materials Research Group (GAMRG), School of Science and Technology, Sunway University, No. 5, Jalan Universiti, Bandar Sunway, Subang Jaya, Selangor 47500, Malaysia;
| | - Mohammad Omaish Ansari
- Center of Nanotechnology, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (J.I.); (P.M.Z.H.)
- Correspondence: (M.O.A.); (S.R.); Tel.: +966-540461642 (M.O.A.); +603-7967-4391 (S.R.); Fax: +603-7967-4146 (S.R.)
| | - Rashida Jafer
- Department of Physics, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia;
| | - Priyanka R. Jagadish
- Graphene & Advanced 2D Materials Research Group (GAMRG), School of Science and Technology, Sunway University, No. 5, Jalan Universiti, Bandar Sunway, Subang Jaya, Selangor 47500, Malaysia;
| | - Shahid Bashir
- Centre for Ionics University of Malaya, Department of Physics, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia; (S.B.); (K.R.)
| | - P. M. Z. Hasan
- Center of Nanotechnology, King Abdulaziz University, Jeddah 21589, Saudi Arabia; (J.I.); (P.M.Z.H.)
| | - Anwar L. Bilgrami
- Deanship of Scientific Research, King Abdulaziz University, Jeddah 21589, Saudi Arabia;
| | - Sharifah Mohamad
- Department of Chemistry, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia;
| | - K. Ramesh
- Centre for Ionics University of Malaya, Department of Physics, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia; (S.B.); (K.R.)
| | - S. Ramesh
- Centre for Ionics University of Malaya, Department of Physics, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia; (S.B.); (K.R.)
- Correspondence: (M.O.A.); (S.R.); Tel.: +966-540461642 (M.O.A.); +603-7967-4391 (S.R.); Fax: +603-7967-4146 (S.R.)
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Bashir S, Hina M, Iqbal J, Rajpar AH, Mujtaba MA, Alghamdi NA, Wageh S, Ramesh K, Ramesh S. Fundamental Concepts of Hydrogels: Synthesis, Properties, and Their Applications. Polymers (Basel) 2020; 12:E2702. [PMID: 33207715 PMCID: PMC7697203 DOI: 10.3390/polym12112702] [Citation(s) in RCA: 220] [Impact Index Per Article: 55.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/21/2020] [Revised: 11/11/2020] [Accepted: 11/11/2020] [Indexed: 11/16/2022] Open
Abstract
In the present review, we focused on the fundamental concepts of hydrogels-classification, the polymers involved, synthesis methods, types of hydrogels, properties, and applications of the hydrogel. Hydrogels can be synthesized from natural polymers, synthetic polymers, polymerizable synthetic monomers, and a combination of natural and synthetic polymers. Synthesis of hydrogels involves physical, chemical, and hybrid bonding. The bonding is formed via different routes, such as solution casting, solution mixing, bulk polymerization, free radical mechanism, radiation method, and interpenetrating network formation. The synthesized hydrogels have significant properties, such as mechanical strength, biocompatibility, biodegradability, swellability, and stimuli sensitivity. These properties are substantial for electrochemical and biomedical applications. Furthermore, this review emphasizes flexible and self-healable hydrogels as electrolytes for energy storage and energy conversion applications. Insufficient adhesiveness (less interfacial interaction) between electrodes and electrolytes and mechanical strength pose serious challenges, such as delamination of the supercapacitors, batteries, and solar cells. Owing to smart and aqueous hydrogels, robust mechanical strength, adhesiveness, stretchability, strain sensitivity, and self-healability are the critical factors that can identify the reliability and robustness of the energy storage and conversion devices. These devices are highly efficient and convenient for smart, light-weight, foldable electronics and modern pollution-free transportation in the current decade.
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Affiliation(s)
- Shahid Bashir
- Centre for Ionics University of Malaya, Department of Physics, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia; (M.H.); (K.R.)
| | - Maryam Hina
- Centre for Ionics University of Malaya, Department of Physics, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia; (M.H.); (K.R.)
| | - Javed Iqbal
- Center of Nanotechnology, King Abdulaziz University, Jeddah 21589, Saudi Arabia;
| | - A. H. Rajpar
- Mechanical Engineering Department, Jouf University, Sakaka 42421, Saudi Arabia;
| | - M. A. Mujtaba
- Department of Mechanical Engineering, Center for Energy Science, University of Malaya, Kuala Lumpur 50603, Malaysia;
| | - N. A. Alghamdi
- Department of Physics, Faculty of Science, Albaha University, Alaqiq 65779-77388, Saudi Arabia;
| | - S. Wageh
- Department of Physics, Faculty of Science, King Abdulaziz University, Jeddah 21589, Saudi Arabia;
| | - K. Ramesh
- Centre for Ionics University of Malaya, Department of Physics, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia; (M.H.); (K.R.)
| | - S. Ramesh
- Centre for Ionics University of Malaya, Department of Physics, Faculty of Science, University of Malaya, Kuala Lumpur 50603, Malaysia; (M.H.); (K.R.)
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Kishanji M, Mamatha G, Madhuri D, Suresh Kumar D, Vijaya Charan G, Ramesh S, Jadhav V, Madhukar K. Preparation and characterization of cellulose/ in situ generated silver nanoparticle composite films prepared using Pongamia pinnata leaf extract as a reducing and stabilizing agent. INORG NANO-MET CHEM 2020. [DOI: 10.1080/24701556.2020.1822869] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
Affiliation(s)
- M. Kishanji
- Polymer Nanocomposites and Functional Materials Laboratory, Department of Physics, University College of Science, Osmania University, Hyderabad, Telangana, India
| | - G. Mamatha
- Polymer Nanocomposites and Functional Materials Laboratory, Department of Physics, University College of Science, Osmania University, Hyderabad, Telangana, India
| | - D. Madhuri
- Department of Physics, Univeristy College for Women, Osmania University, Koti, Hyderabad, Telangana, India
| | - D. Suresh Kumar
- Department of Physics, P G Centre, Satavahana University, Godavarikhani, Telangana, India
| | - G. Vijaya Charan
- Department of Chemistry, College of Science, Osmania University, Hyderabad, Telangana, India
| | - S. Ramesh
- Department of Physics, Malla Reddy institute of Technology and Science, Hyderabad, Telangana, India
| | - Vijaykumar Jadhav
- Department of Material Science & Engineering, Guangdong Technion, Israel Institute of Technology, Shantou, China
| | - K. Madhukar
- Polymer Nanocomposites and Functional Materials Laboratory, Department of Physics, University College of Science, Osmania University, Hyderabad, Telangana, India
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