1
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Kherdekar RD, Ade AB. Integrated approaches for plastic waste management. Front Microbiol 2024; 15:1426509. [PMID: 39391604 PMCID: PMC11465426 DOI: 10.3389/fmicb.2024.1426509] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/01/2024] [Accepted: 08/20/2024] [Indexed: 10/12/2024] Open
Abstract
Plastic pollution is the challenging problem of the world due to usage of plastic in daily life. Plastic is essential for packaging food and other goods and utensils to avoid the risk of microbial attack. Due to its hydrophobic nature, it is used for wrapping as laminates or packaging liquid substances in pouches and sachets. The tensile strength of the plastic is more therefore it is used for manufacturing carrying bags that can bear heavy loads. Plastic is available in various forms as per the requirements in our daily life. Annually millions to trillions of polyethene carry bags are being manufactured and utilized throughout the world. The plastic requires millions of years for natural degradation. The physical and chemical processes are able to degrade plastic material at the meager level by 200 to 500 years in natural conditions. Many industries focus on recycling of plastic. Biodegradation is a comparatively slow and cheaper process that involves microbes. To dispose of plastic completely there is a need of an integrated process in which all the possible methods of disposal are involved and used sustainably so that minimum depletion occurs to the livestock and the environment. In the current review, we could try to emphasize the intricate nature of plastic polymers, pollution caused by it and possible mitigation strategies for plastic waste management.
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Shakiba M, Pourmadadi M, Hosseini SM, Bigham A, Rahmani E, Sheikhi M, Pahnavar Z, Foroozandeh A, Tajiki A, Jouybar S, Abdouss M. A bi-functional nanofibrous composite membrane for wound healing applications. Arch Pharm (Weinheim) 2024; 357:e2400001. [PMID: 38747690 DOI: 10.1002/ardp.202400001] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/05/2024] [Revised: 04/15/2024] [Accepted: 04/17/2024] [Indexed: 08/06/2024]
Abstract
Various wound dressings have been developed so far for wound healing, but most of them are ineffective in properly reestablishing the skin's structure, which increases infection risks and dehydration. Electrospun membranes are particularly interesting for wound dressing applications because they mimic the extracellular matrix of healthy skin. In this study, a potential wound healing platform capable of inducing synergistic antibacterial and antioxidation activities was developed by incorporating bio-active rosmarinic acid-hydroxyapatite hybrid (HAP-RA) with different contents (0.5, 1, and 1.5 wt.%) into the electrospun polyamide 6 (PA6) nanofibers. Then, polyethylene glycol (PEG) was introduced to the nanofibrous composite to improve the biocompatibility and biodegradability of the dressing. The results indicated that the hydrophilicity, water uptake, biodegradability, and mechanical properties of the obtained PA6/PEG/HAP-RA nanofibrous composite enhanced at 1 wt.% of HAP-RA. The nanofibrous composite had excellent antibacterial activity. The antioxidation potential of the samples was assessed in vitro. The MTT assay performed on the L929 cell line confirmed the positive effects of the nanofibrous scaffold on cell viability and proliferation. According to the results, the PA6/PEG/HAP-RA nanofibrous composite showed the desirable physiochemical and biological properties besides antibacterial and antioxidative capabilities, making it a promising candidate for further studies in wound healing applications.
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Affiliation(s)
| | - Mehrab Pourmadadi
- Department of Biotechnology, School of Chemical Engineering, College of Engineering, University of Tehran, Tehran, Iran
| | - Seyede M Hosseini
- Department of Chemistry, Amirkabir University of Technology, Tehran, Iran
| | - Ashkan Bigham
- Institute of Polymers, Composites, and Biomaterials, National Research Council (IPCB-CNR), Naples, Italy
| | - Erfan Rahmani
- Department of Biomedical Engineering, University of Delaware, Newark, Delaware, USA
| | - Mehdi Sheikhi
- Polymer Chemistry Research Laboratory, Department of Chemistry, University of Isfahan, Isfahan, Iran
| | - Zohreh Pahnavar
- Department of Organic Chemistry, Faculty of Chemistry, University of Mazandaran, Babolsar, Iran
| | - Amin Foroozandeh
- Department of Chemistry, Amirkabir University of Technology, Tehran, Iran
| | - Alireza Tajiki
- Department of Chemistry, Amirkabir University of Technology, Tehran, Iran
| | - Shirzad Jouybar
- Department of Chemistry, Amirkabir University of Technology, Tehran, Iran
| | - Majid Abdouss
- Department of Chemistry, Amirkabir University of Technology, Tehran, Iran
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3
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Chakraborty TK, Rahman MS, Nice MS, Netema BN, Islam KR, Debnath PC, Chowdhury P, Halder M, Zaman S, Ghosh GC, Rayhan MA, Asif SMH, Biswas A, Sarker S, Hasan MJ, Ahmmed M, Munna A. Application of machine learning and multivariate approaches for assessing microplastic pollution and its associated risks in the urban outdoor environment of Bangladesh. JOURNAL OF HAZARDOUS MATERIALS 2024; 472:134359. [PMID: 38691990 DOI: 10.1016/j.jhazmat.2024.134359] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/27/2024] [Revised: 04/10/2024] [Accepted: 04/18/2024] [Indexed: 05/03/2024]
Abstract
Microplastics (MPs) are an emerging global concern due to severe toxicological risks for ecosystems and public health. Therefore, this is the first study in Bangladesh to assess MP pollution and its associated risks for ecosystems and human health in the outdoor urban environment using machine learning and multivariate approaches. The occurrences of MPs in the urban road dust were 52.76 ± 20.24 particles/g with high diversity, where fiber shape (77%), 0.1-0.5 mm size MPs (75%), blue color (26%), and low-density polyethylene (24%) polymer was the dominating MPs category. Pollution load index value (1.28-4.42), showed severe pollution by MPs. Additionally, the contamination factor (1.00-5.02), and Nemerow pollution index (1.38-5.02), indicate moderate to severe MP pollution. The identified polymers based on calculated potential ecological risk (2248.52 ± 1792.79) and polymer hazard index (814.04 ± 346.15) showed very high and high risks, respectively. The occurrences of MPs could effectively be predicted by random forest, and support random vector machine, where EC, salinity, pH, OC, and texture classes were the influencing parameters. Considering the human health aspect, children and adults could be acutely exposed to 19259.68 and 5777.90 MP particles/ year via oral ingestion. Monte-Carlo-based polymers associated cancer risk assessment results indicate moderate risk and high risk for adults and children, respectively, where children were more vulnerable than adults for MP pollution risks. Overall assessment mentioned that Dhaka was the most polluted division among the other divisions.
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Affiliation(s)
- Tapos Kumar Chakraborty
- Department of Environmental Science and Technology, Jashore University of Science and Technology, Jashore 7408, Bangladesh.
| | - Md Sozibur Rahman
- Department of Environmental Science and Technology, Jashore University of Science and Technology, Jashore 7408, Bangladesh
| | - Md Simoon Nice
- Department of Environmental Science and Technology, Jashore University of Science and Technology, Jashore 7408, Bangladesh
| | - Baytune Nahar Netema
- Department of Environmental Science and Technology, Jashore University of Science and Technology, Jashore 7408, Bangladesh
| | - Khandakar Rashedul Islam
- Department of Environmental Science and Technology, Jashore University of Science and Technology, Jashore 7408, Bangladesh
| | - Partha Chandra Debnath
- Department of Environmental Science and Technology, Jashore University of Science and Technology, Jashore 7408, Bangladesh
| | - Pragga Chowdhury
- Department of Environmental Science and Technology, Jashore University of Science and Technology, Jashore 7408, Bangladesh
| | - Monishanker Halder
- Department of Computer Science and Engineering, Jashore University of Science and Technology, Jashore 7408, Bangladesh
| | - Samina Zaman
- Department of Environmental Science and Technology, Jashore University of Science and Technology, Jashore 7408, Bangladesh
| | - Gopal Chandra Ghosh
- Department of Environmental Science and Technology, Jashore University of Science and Technology, Jashore 7408, Bangladesh
| | - Md Abu Rayhan
- Department of Environmental Science and Technology, Jashore University of Science and Technology, Jashore 7408, Bangladesh
| | - Sk Mahmudul Hasan Asif
- Department of Environmental Science and Technology, Jashore University of Science and Technology, Jashore 7408, Bangladesh
| | - Aditi Biswas
- Department of Environmental Science and Technology, Jashore University of Science and Technology, Jashore 7408, Bangladesh
| | - Sarajit Sarker
- Department of Environmental Science and Technology, Jashore University of Science and Technology, Jashore 7408, Bangladesh
| | - Md Jahid Hasan
- Department of Environmental Science and Technology, Jashore University of Science and Technology, Jashore 7408, Bangladesh
| | - Mahfuz Ahmmed
- Department of Environmental Science and Technology, Jashore University of Science and Technology, Jashore 7408, Bangladesh
| | - Asadullah Munna
- Department of Environmental Science and Technology, Jashore University of Science and Technology, Jashore 7408, Bangladesh
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4
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Arioli M, Puiggalí J, Franco L. Nylons with Applications in Energy Generators, 3D Printing and Biomedicine. Molecules 2024; 29:2443. [PMID: 38893319 PMCID: PMC11173604 DOI: 10.3390/molecules29112443] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2024] [Revised: 05/14/2024] [Accepted: 05/17/2024] [Indexed: 06/21/2024] Open
Abstract
Linear polyamides, known as nylons, are a class of synthetic polymers with a wide range of applications due to their outstanding properties, such as chemical and thermal resistance or mechanical strength. These polymers have been used in various fields: from common and domestic applications, such as socks and fishing nets, to industrial gears or water purification membranes. By their durability, flexibility and wear resistance, nylons are now being used in addictive manufacturing technology as a good material choice to produce sophisticated devices with precise and complex geometric shapes. Furthermore, the emergence of triboelectric nanogenerators and the development of biomaterials have highlighted the versatility and utility of these materials. Due to their ability to enhance triboelectric performance and the range of applications, nylons show a potential use as tribo-positive materials. Because of the easy control of their shape, they can be subsequently integrated into nanogenerators. The use of nylons has also extended into the field of biomaterials, where their biocompatibility, mechanical strength and versatility have paved the way for groundbreaking advances in medical devices as dental implants, catheters and non-absorbable surgical sutures. By means of 3D bioprinting, nylons have been used to develop scaffolds, joint implants and drug carriers with tailored properties for various biomedical applications. The present paper aims to collect evidence of these recently specific applications of nylons by reviewing the literature produced in recent decades, with a special focus on the newer technologies in the field of energy harvesting and biomedicine.
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Affiliation(s)
- Matteo Arioli
- Departament d’Enginyeria Química, Escola d’Enginyeria de Barcelona Est-EEBE, Universitat Politècnica de Catalunya, Av. Eduard Maristany 10–14, 08019 Barcelona, Spain; (M.A.); (J.P.)
| | - Jordi Puiggalí
- Departament d’Enginyeria Química, Escola d’Enginyeria de Barcelona Est-EEBE, Universitat Politècnica de Catalunya, Av. Eduard Maristany 10–14, 08019 Barcelona, Spain; (M.A.); (J.P.)
- Barcelona Research Center in Multiscale Science and Engineering, Universitat Politècnica de Catalunya, Campus Diagonal-Besòs, Av. Eduard Maristany 10–14, 08019 Barcelona, Spain
| | - Lourdes Franco
- Departament d’Enginyeria Química, Escola d’Enginyeria de Barcelona Est-EEBE, Universitat Politècnica de Catalunya, Av. Eduard Maristany 10–14, 08019 Barcelona, Spain; (M.A.); (J.P.)
- Barcelona Research Center in Multiscale Science and Engineering, Universitat Politècnica de Catalunya, Campus Diagonal-Besòs, Av. Eduard Maristany 10–14, 08019 Barcelona, Spain
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Domingues JM, Miranda CS, Homem NC, Felgueiras HP, Antunes JC. Nanoparticle Synthesis and Their Integration into Polymer-Based Fibers for Biomedical Applications. Biomedicines 2023; 11:1862. [PMID: 37509502 PMCID: PMC10377033 DOI: 10.3390/biomedicines11071862] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2023] [Revised: 06/23/2023] [Accepted: 06/26/2023] [Indexed: 07/30/2023] Open
Abstract
The potential of nanoparticles as effective drug delivery systems combined with the versatility of fibers has led to the development of new and improved strategies to help in the diagnosis and treatment of diseases. Nanoparticles have extraordinary characteristics that are helpful in several applications, including wound dressings, microbial balance approaches, tissue regeneration, and cancer treatment. Owing to their large surface area, tailor-ability, and persistent diameter, fibers are also used for wound dressings, tissue engineering, controlled drug delivery, and protective clothing. The combination of nanoparticles with fibers has the power to generate delivery systems that have enhanced performance over the individual architectures. This review aims at illustrating the main possibilities and trends of fibers functionalized with nanoparticles, focusing on inorganic and organic nanoparticles and polymer-based fibers. Emphasis on the recent progress in the fabrication procedures of several types of nanoparticles and in the description of the most used polymers to produce fibers has been undertaken, along with the bioactivity of such alliances in several biomedical applications. To finish, future perspectives of nanoparticles incorporated within polymer-based fibers for clinical use are presented and discussed, thus showcasing relevant paths to follow for enhanced success in the field.
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Affiliation(s)
- Joana M Domingues
- Centre for Textile Science and Technology (2C2T), Campus of Azurém, University of Minho, 4800-058 Guimarães, Portugal
| | - Catarina S Miranda
- Centre for Textile Science and Technology (2C2T), Campus of Azurém, University of Minho, 4800-058 Guimarães, Portugal
| | - Natália C Homem
- Simoldes Plastics S.A., Rua Comendador António da Silva Rodrigues 165, 3720-193 Oliveira de Azeméis, Portugal
| | - Helena P Felgueiras
- Centre for Textile Science and Technology (2C2T), Campus of Azurém, University of Minho, 4800-058 Guimarães, Portugal
| | - Joana C Antunes
- Centre for Textile Science and Technology (2C2T), Campus of Azurém, University of Minho, 4800-058 Guimarães, Portugal
- Fibrenamics, Institute of Innovation on Fiber-Based Materials and Composites, Campus of Azurém, University of Minho, 4800-058 Guimarães, Portugal
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6
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Min R, Ma K, Zhang H, Zhang J, Yang S, Zhou T, Zhang G. Distribution and risk assessment of microplastics in Liujiaxia Reservoir on the upper Yellow River. CHEMOSPHERE 2023; 320:138031. [PMID: 36739993 DOI: 10.1016/j.chemosphere.2023.138031] [Citation(s) in RCA: 12] [Impact Index Per Article: 12.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 01/28/2023] [Accepted: 01/30/2023] [Indexed: 06/18/2023]
Abstract
Microplastics (MPSs) distribution in global freshwater systems is extensively reported, but the distribution of MPSs in reservoirs of the Yellow River has rarely been studied. To fill in this gap, we systematically investigated the distribution of MPSs in surface water and bank sediments gleaned from Liujiaxia Reservoir of the upper Yellow River for the first time and conducted an ecological risk assessment in succession in this work. The results showed that the main polymer types of MPSs in the surface water and bank sediments of Liujiaxia Reservoir were polyethylene terephthalate (PET), polystyrene (PS), and polypropylene (PP), and the abundance of MPSs in the reservoir surface water and bank sediments ranged from 4.48 to 12.09 item/L and 447.27 to 1543.80 item/kg (dry weight), respectively. Further physical morphology analysis of MPSs in the samples revealed that MPSs in the surface water and bank sediments of Liujiaxia Reservoir were predominantly fibrous with small particle sizes (<1 mm), and there was abundant color, mainly exhibiting transparent, black, and blue. The results of the MPS pollution load index (PLI>1) and the hazard ranking of MPSs (HZone = 10.20 for surface water and HZone = 14.06 for bank sediments) yielded a hazard class II for MPS pollution in Liujiaxia Reservoir, the combined pollution risk index (PRIZone = 17.05 for surface water and PRIZone = 31.25 for bank sediments) stated clearly the potential ecological risk in the Liujiaxia Reservoir. Briefly, this study supplemented and enriched the data on the distribution of MPSs in the reservoirs of the Yellow River basin, and provide a benchmark for future pollution control and management in the reservoir area.
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Affiliation(s)
- Rui Min
- School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou, 730070, China; Key Laboratory of Yellow River Water Environment in Gansu Province, Lanzhou Jiaotong University, Lanzhou, 730070, China
| | - Kai Ma
- School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou, 730070, China; Key Laboratory of Yellow River Water Environment in Gansu Province, Lanzhou Jiaotong University, Lanzhou, 730070, China
| | - Hongwei Zhang
- School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou, 730070, China; Key Laboratory of Yellow River Water Environment in Gansu Province, Lanzhou Jiaotong University, Lanzhou, 730070, China
| | - Jiaqian Zhang
- School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou, 730070, China; Key Laboratory of Yellow River Water Environment in Gansu Province, Lanzhou Jiaotong University, Lanzhou, 730070, China
| | - Siyi Yang
- School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou, 730070, China; Key Laboratory of Yellow River Water Environment in Gansu Province, Lanzhou Jiaotong University, Lanzhou, 730070, China
| | - Tianhong Zhou
- School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou, 730070, China; Key Laboratory of Yellow River Water Environment in Gansu Province, Lanzhou Jiaotong University, Lanzhou, 730070, China.
| | - Guozhen Zhang
- School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou, 730070, China; Key Laboratory of Yellow River Water Environment in Gansu Province, Lanzhou Jiaotong University, Lanzhou, 730070, China.
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7
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Zhou K, Guo C, Gan F, Xin JH, Yu H. Large-area ultra-thin GO nanofiltration membranes prepared by a pre-crosslinking rod coating technique. J Colloid Interface Sci 2023; 640:261-269. [PMID: 36863182 DOI: 10.1016/j.jcis.2023.02.107] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2022] [Revised: 02/17/2023] [Accepted: 02/21/2023] [Indexed: 02/26/2023]
Abstract
In existing separation membranes, it is difficult to quickly produce large-area graphene oxide (GO) nanofiltration membranes with high permeability and high rejection, which is the bottleneck of industrialization. In this study, a pre-crosslinking rod-coating technique is reported. A GO-P-Phenylenediamine (PPD) suspension was obtained by chemically crosslinking GO and PPD for 180 min. After scraping and coating with a Mayer rod, the ultra-thin GO-PPD nanofiltration membrane with an area of 400 cm2 and a thickness of 40 nm was prepared in 30 s. The PPD formed an amide bond with GO to improve its stability. It also increased the layer spacing of GO membrane, which could improve the permeability. The prepared GO nanofiltration membrane had a 99 % rejection rate for dyes such as methylene blue, crystal violet, and Congo red. Meanwhile, the permeation flux reached to 42 LMH/bar, which was 10 times that of the GO membrane without PPD crosslinking, and it still maintained excellent stability under strongly acidic and basic conditions. This work successfully solved the problems of GO nanofiltration membranes, including the large-area fabrication, high permeability and high rejection.
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Affiliation(s)
- Kai Zhou
- Guangdong-Hong Kong Joint Laboratory for Advanced Textile Materials, School of Textile Materials and Engineering, Wuyi University, Jiangmen 529020, China
| | - Changsheng Guo
- Guangdong-Hong Kong Joint Laboratory for Advanced Textile Materials, School of Textile Materials and Engineering, Wuyi University, Jiangmen 529020, China
| | - Feng Gan
- Guangdong-Hong Kong Joint Laboratory for Advanced Textile Materials, School of Textile Materials and Engineering, Wuyi University, Jiangmen 529020, China
| | - John H Xin
- Institute of Textiles & Clothing, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong, China.
| | - Hui Yu
- Guangdong-Hong Kong Joint Laboratory for Advanced Textile Materials, School of Textile Materials and Engineering, Wuyi University, Jiangmen 529020, China.
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8
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Yu J, Ge J, Yu H, Ye L. Improved Bioproduction of the Nylon 12 Monomer by Combining the Directed Evolution of P450 and Enhancing Heme Synthesis. Molecules 2023; 28:molecules28041758. [PMID: 36838746 PMCID: PMC9963201 DOI: 10.3390/molecules28041758] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2023] [Revised: 02/04/2023] [Accepted: 02/08/2023] [Indexed: 02/15/2023] Open
Abstract
The nylon 12 (PA12) monomer ω-aminododecanoic acid (ω-AmDDA) could be synthesized from lauric acid (DDA) through multi-enzyme cascade transformation using engineered E. coli, with the P450 catalyzing terminal hydroxylation of DDA as a rate-limiting enzyme. Its activity is jointly determined by the heme domain and the reductase domain. To obtain a P450 mutant with higher activity, directed evolution was conducted using a colorimetric high-throughput screening (HTS) system with DDA as the real substrate. After two rounds of directed evolution, a positive double-site mutant (R14R/D629G) with 90.3% higher activity was obtained. Molecular docking analysis, kinetic parameter determination and protein electrophoresis suggested the improved soluble expression of P450 resulting from the synonymous mutation near the N-terminus and the shortened distance of the electron transfer between FMN and FAD caused by D629G mutation as the major reasons for activity improvement. The significantly increased kcat and unchanged Km provided further evidence for the increase in electron transfer efficiency. Considering the important role of heme in P450, its supply was strengthened by the metabolic engineering of the heme synthesis pathway. By combining P450-directed evolution and enhancing heme synthesis, 2.02 ± 0.03 g/L of ω-AmDDA was produced from 10 mM DDA, with a yield of 93.6%.
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Affiliation(s)
- Jiaming Yu
- Key Laboratory of Biomass Chemical Engineering (Education Ministry), College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310058, China
- Institute of Bioengineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310058, China
| | - Jiawei Ge
- Institute of Bioengineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310058, China
| | - Hongwei Yu
- Key Laboratory of Biomass Chemical Engineering (Education Ministry), College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310058, China
- Institute of Bioengineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310058, China
- Correspondence: (H.Y.); (L.Y.)
| | - Lidan Ye
- Key Laboratory of Biomass Chemical Engineering (Education Ministry), College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310058, China
- Institute of Bioengineering, College of Chemical and Biological Engineering, Zhejiang University, Hangzhou 310058, China
- Correspondence: (H.Y.); (L.Y.)
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9
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pH-driven continuous stem cell production with enhanced regenerative capacity from polyamide/chitosan surfaces. Mater Today Bio 2023; 18:100514. [DOI: 10.1016/j.mtbio.2022.100514] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/18/2022] [Revised: 11/16/2022] [Accepted: 12/02/2022] [Indexed: 12/12/2022] Open
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10
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Son J, Sohn YJ, Baritugo KA, Jo SY, Song HM, Park SJ. Recent advances in microbial production of diamines, aminocarboxylic acids, and diacids as potential platform chemicals and bio-based polyamides monomers. Biotechnol Adv 2023; 62:108070. [PMID: 36462631 DOI: 10.1016/j.biotechadv.2022.108070] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2022] [Revised: 11/16/2022] [Accepted: 11/24/2022] [Indexed: 12/03/2022]
Abstract
Recently, bio-based manufacturing processes of value-added platform chemicals and polymers in biorefineries using renewable resources have extensively been developed for sustainable and carbon dioxide (CO2) neutral-based industry. Among them, bio-based diamines, aminocarboxylic acids, and diacids have been used as monomers for the synthesis of polyamides having different carbon numbers and ubiquitous and versatile industrial polymers and also as precursors for further chemical and biological processes to afford valuable chemicals. Until now, these platform bio-chemicals have successfully been produced by biorefinery processes employing enzymes and/or microbial host strains as main catalysts. In this review, we discuss recent advances in bio-based production of diamines, aminocarboxylic acids, and diacids, which has been developed and improved by systems metabolic engineering strategies of microbial consortia and optimization of microbial conversion processes including whole cell bioconversion and direct fermentative production.
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Affiliation(s)
- Jina Son
- Department of Chemical Engineering and Materials Science, Graduate Program in System Health Science and Engineering, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul 03760, Republic of Korea
| | - Yu Jung Sohn
- Department of Chemical Engineering and Materials Science, Graduate Program in System Health Science and Engineering, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul 03760, Republic of Korea
| | - Kei-Anne Baritugo
- Department of Chemical Engineering and Materials Science, Graduate Program in System Health Science and Engineering, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul 03760, Republic of Korea
| | - Seo Young Jo
- Department of Chemical Engineering and Materials Science, Graduate Program in System Health Science and Engineering, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul 03760, Republic of Korea
| | - Hye Min Song
- Department of Chemical Engineering and Materials Science, Graduate Program in System Health Science and Engineering, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul 03760, Republic of Korea
| | - Si Jae Park
- Department of Chemical Engineering and Materials Science, Graduate Program in System Health Science and Engineering, Ewha Womans University, 52 Ewhayeodae-gil, Seodaemun-gu, Seoul 03760, Republic of Korea.
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11
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Polyamide 6/tallow modified clay nanofibrous mat coupled with hydrogels for potential topical/transdermal delivery of doxycycline hydrochloride. JOURNAL OF PHARMACEUTICAL INVESTIGATION 2022. [DOI: 10.1007/s40005-022-00598-4] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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12
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Laser Sintering Approaches for Bone Tissue Engineering. Polymers (Basel) 2022; 14:polym14122336. [PMID: 35745911 PMCID: PMC9229946 DOI: 10.3390/polym14122336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Revised: 05/30/2022] [Accepted: 06/06/2022] [Indexed: 11/17/2022] Open
Abstract
The adoption of additive manufacturing (AM) techniques into the medical space has revolutionised tissue engineering. Depending upon the tissue type, specific AM approaches are capable of closely matching the physical and biological tissue attributes, to guide tissue regeneration. For hard tissue such as bone, powder bed fusion (PBF) techniques have significant potential, as they are capable of fabricating materials that can match the mechanical requirements necessary to maintain bone functionality and support regeneration. This review focuses on the PBF techniques that utilize laser sintering for creating scaffolds for bone tissue engineering (BTE) applications. Optimal scaffold requirements are explained, ranging from material biocompatibility and bioactivity, to generating specific architectures to recapitulate the porosity, interconnectivity, and mechanical properties of native human bone. The main objective of the review is to outline the most common materials processed using PBF in the context of BTE; initially outlining the most common polymers, including polyamide, polycaprolactone, polyethylene, and polyetheretherketone. Subsequent sections investigate the use of metals and ceramics in similar systems for BTE applications. The last section explores how composite materials can be used. Within each material section, the benefits and shortcomings are outlined, including their mechanical and biological performance, as well as associated printing parameters. The framework provided can be applied to the development of new, novel materials or laser-based approaches to ultimately generate bone tissue analogues or for guiding bone regeneration.
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Al Nahian S, Rakib MRJ, Haider SMB, Kumar R, Mohsen M, Sharma P, Khandaker MU. Occurrence, spatial distribution, and risk assessment of microplastics in surface water and sediments of Saint Martin Island in the Bay of Bengal. MARINE POLLUTION BULLETIN 2022; 179:113720. [PMID: 35561514 DOI: 10.1016/j.marpolbul.2022.113720] [Citation(s) in RCA: 22] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/26/2022] [Revised: 04/09/2022] [Accepted: 04/29/2022] [Indexed: 05/14/2023]
Abstract
Microplastics (MPs) are emerging contaminants in aquatic and terrestrial ecosystems and have caused substantial concern worldwide. This study surveyed the presence of MPs in surface water and sediments across the coastal area of Saint Martin Island in the Bay of Bengal. MPs were collected following the standard protocol and identified as various types like expanded polystyrene, foam, filaments, fragments, lines, fibres, and paint flakes. Total MPs pollution in beach sediment was 317 particles/kg across 14 sampling sites, varied from 11 to 10589 particles/m2 of dry sediment and 0.95 particles/m3, having ~2 to 19 particles/30 min trawl in coastal surface water samples. Most of the frequent MPs in beach sediments ranged from 1.0 to 2.0 mm, whereas the fragments were predominant in sediment and surface water samples. MPs distribution revealed that different shapes were dominant at different sites within the Island. The calculated pollution risk index due to the presence of MPs indicated that the sediment and surface water samples were under the low-risk category. However, polymeric risk assessment and contamination factors suggest that the coastline is significantly polluted, as high pollution load indices (PLI >1) were observed for sediments and coastal surface water samples. This work provides the detailed MPs data in the coastal environment of Saint Martin Island for the first time; hence it may be helpful to develop proper strategies to deal with environmental problems.
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Affiliation(s)
- Sultan Al Nahian
- Environmental Oceanography and Climate Division, Bangladesh Oceanographic Research Institute, Cox's Bazar, Bangladesh.
| | - Md Refat Jahan Rakib
- Department of Fisheries and Marine Science, Faculty of Science, Noakhali Science and Technology University, Noakhali, Bangladesh.
| | - Sayeed Mahmood Belal Haider
- Environmental Oceanography and Climate Division, Bangladesh Oceanographic Research Institute, Cox's Bazar, Bangladesh
| | - Rakesh Kumar
- School of Ecology and Environment Studies, Nalanda University, Rajgir 803116, Bihar, India
| | - Mohamed Mohsen
- Department of Fish Production, Faculty of Agriculture, Al-Azhar University, Nasr City, Cairo 11884, Egypt; CAS Key Laboratory of Marine Ecology and Environmental Sciences, Institute of Oceanology, Chinese Academy of Sciences, Qingdao 266071, China
| | - Prabhakar Sharma
- School of Ecology and Environment Studies, Nalanda University, Rajgir 803116, Bihar, India
| | - Mayeen Uddin Khandaker
- Centre for Applied Physics and Radiation Technologies, School of Engineering and Technology, Sunway University, 47500 Bandar Sunway, Selangor, Malaysia
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14
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Lainer T, Czerny F, Haas M. Solvent-free amide bond formation using a variety of methoxysilanes as coupling agent. Org Biomol Chem 2022; 20:3717-3720. [PMID: 35441639 PMCID: PMC9092949 DOI: 10.1039/d2ob00589a] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
A solvent-free procedure for the formation of amides without exclusion of air and moisture is described. Using tetramethoxysilane 1, hexamethoxydisilane 2 and dodecamethoxy-neopentasilane 3 as coupling agent carboxylic acids and amines are reacted to form amides in good to excellent yields. The formation of these amides was confirmed by NMR spectroscopy and mass spectrometry. Remarkably, neopentasilane 3 exceeds the performance of the currently used monosilanes as coupling agent in terms of group tolerance and yield.
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Affiliation(s)
- Thomas Lainer
- Institute of Inorganic Chemistry, Graz University of Technology, Stremayrgasse 9, 8010 Graz, Austria.
| | - Frank Czerny
- Department of Chemistry, Metalorganics and Inorganic Materials, Technische Universität Berlin, Strasse des 17. Juni 135, Sekr. C2, 10623 Berlin, Germany
| | - Michael Haas
- Institute of Inorganic Chemistry, Graz University of Technology, Stremayrgasse 9, 8010 Graz, Austria.
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Xu Y, Zhao C, Guo Z, Dong W, Liu X, Guo W. EPDM‐g‐MAH
toughened bio‐based polyamide 56 to prepare thermoplastic polyamide elastomer and the performance characterization. J Appl Polym Sci 2022. [DOI: 10.1002/app.52346] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Yuhan Xu
- Institute of Bio‐Based Materials Key Laboratory for Preparation and Application of Ultrafine Materials of Ministry of Education, School of Material Science and Engineering, East China University of Science and Technology Shanghai China
| | - Chenyu Zhao
- Institute of Bio‐Based Materials Key Laboratory for Preparation and Application of Ultrafine Materials of Ministry of Education, School of Material Science and Engineering, East China University of Science and Technology Shanghai China
| | - Zhiyuan Guo
- Institute of Bio‐Based Materials Key Laboratory for Preparation and Application of Ultrafine Materials of Ministry of Education, School of Material Science and Engineering, East China University of Science and Technology Shanghai China
| | - Wenjie Dong
- Institute of Bio‐Based Materials Key Laboratory for Preparation and Application of Ultrafine Materials of Ministry of Education, School of Material Science and Engineering, East China University of Science and Technology Shanghai China
| | - Xiucai Liu
- Institute of Bio‐Based Materials Key Laboratory for Preparation and Application of Ultrafine Materials of Ministry of Education, School of Material Science and Engineering, East China University of Science and Technology Shanghai China
| | - Weihong Guo
- Institute of Bio‐Based Materials Key Laboratory for Preparation and Application of Ultrafine Materials of Ministry of Education, School of Material Science and Engineering, East China University of Science and Technology Shanghai China
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Lencova S, Stiborova H, Munzarova M, Demnerova K, Zdenkova K. Potential of Polyamide Nanofibers With Natamycin, Rosemary Extract, and Green Tea Extract in Active Food Packaging Development: Interactions With Food Pathogens and Assessment of Microbial Risks Elimination. Front Microbiol 2022; 13:857423. [PMID: 35369475 PMCID: PMC8965076 DOI: 10.3389/fmicb.2022.857423] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/18/2022] [Accepted: 02/24/2022] [Indexed: 11/17/2022] Open
Abstract
Increasing microbial safety and prolonging the shelf life of products is one of the major challenges in the food industry. Active food packaging made from nanofibrous materials enhanced with antimicrobial substances is considered a promising way. In this study, electrospun polyamide (PA) nanofibrous materials functionalized with 2.0 wt% natamycin (NAT), rosemary extract (RE), and green tea extract (GTE), respectively, were prepared as active packaging and tested for the food pathogens Escherichia coli, Listeria monocytogenes, Salmonella enterica, and Staphylococcus aureus. The PAs exhibited: (i) complete retention of bacterial cells reaching 6.0-6.4 log10removal, (ii) antimicrobial activity with 1.6-3.0 log10suppression, and (iii) antibiofilm activity with 1.7-3.0 log10suppression. The PAs prolonged the shelf life of chicken breast; up to 1.9 log10(CFU/g) suppression of total viable colonies and 2.1 log10(CFU/g) suppression of L. monocytogenes were observed after 7 days of storage at 7°C. A beneficial effect on pH and sensory quality was verified. The results confirm microbiological safety and benefits of PA/NAT, PA/RE, and PA/GTE and their potential in developing functional and ecological packaging.
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Affiliation(s)
- Simona Lencova
- Department of Biochemistry and Microbiology, University of Chemistry and Technology, Prague, Czechia
| | - Hana Stiborova
- Department of Biochemistry and Microbiology, University of Chemistry and Technology, Prague, Czechia
| | | | - Katerina Demnerova
- Department of Biochemistry and Microbiology, University of Chemistry and Technology, Prague, Czechia
| | - Kamila Zdenkova
- Department of Biochemistry and Microbiology, University of Chemistry and Technology, Prague, Czechia
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17
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Konuk Tokak E, Çetin Altındal D, Akdere ÖE, Gümüşderelioğlu M. In-vitro effectiveness of poly-β-alanine reinforced poly(3-hydroxybutyrate) fibrous scaffolds for skeletal muscle regeneration. MATERIALS SCIENCE & ENGINEERING. C, MATERIALS FOR BIOLOGICAL APPLICATIONS 2021; 131:112528. [PMID: 34857307 DOI: 10.1016/j.msec.2021.112528] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/15/2021] [Revised: 10/16/2021] [Accepted: 10/25/2021] [Indexed: 12/13/2022]
Abstract
In skeletal muscle tissue engineering, success has not been achieved yet, since the properties of the tissue cannot be fully mimicked. The aim of this study is to investigate the potential use of poly-3-hydroxybutyrate (P3HB)/poly-β-alanine (PBA) fibrous tissue scaffolds with piezoelectric properties for skeletal muscle regeneration. Random and aligned P3HB/PBA (5:1) fibrous matrices were prepared by electrospinning with average diameters of 951 ± 153 nm and 891 ± 247 nm, respectively. X-ray diffraction (XRD) analysis showed that PBA reinforcement and aligned orientation of fibers reduced the crystallinity and brittleness of P3HB matrix. While tensile strength and elastic modulus of random fibrous matrices were determined as 3.9 ± 1.0 MPa and 86.2 ± 10.6 MPa, respectively, in the case of aligned fibers they increased to 8.5 ± 1.8 MPa and 378.2 ± 4.2 MPa, respectively. Aligned matrices exhibited a soft and an elastic behaviour with ~70% elongation in similar to the natural tissue. For the first time, d33 piezoelectric modulus of P3HB/PBA matrices were measured as 5 pC/N and 5.3 pC/N, for random and aligned matrices, respectively. Cell culture studies were performed with C2C12 myoblastic cell line. Both of random and aligned P3HB/PBA fibrous matrices supported attachment and proliferation of myoblasts, but cells cultured on aligned fibers formed regular and thick myofibril structures similar to the native muscle tissue. Reverse transcription polymerase chain reaction (RT-qPCR) analysis indicated that MyoD gene was expressed in the cells cultured on both fiber orientation, however, on the aligned fibers significant increase was determined in Myogenin and Myosin Heavy Chain (MHC) gene expressions, which indicate functional tubular structures. The results of RT-qPCR analysis were also supported with immunohistochemistry for myogenic markers. These in vitro studies have shown that piezoelectric P3HB/PBA aligned fibrous scaffolds can successfully mimic skeletal muscle tissue with its superior chemical, morphological, mechanical, and electroactive properties.
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Affiliation(s)
- Elvan Konuk Tokak
- Nanotechnology and Nanomedicine Division, Hacettepe University, Graduate School of Science and Engineering, Beytepe, Ankara, Turkey
| | - Damla Çetin Altındal
- Bioengineering Division, Hacettepe University, Graduate School of Science and Engineering, Beytepe, Ankara, Turkey
| | - Özge Ekin Akdere
- Bioengineering Division, Hacettepe University, Graduate School of Science and Engineering, Beytepe, Ankara, Turkey
| | - Menemşe Gümüşderelioğlu
- Nanotechnology and Nanomedicine Division, Hacettepe University, Graduate School of Science and Engineering, Beytepe, Ankara, Turkey; Bioengineering Division, Hacettepe University, Graduate School of Science and Engineering, Beytepe, Ankara, Turkey.
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18
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Boddu SHS, Bhagav P, Karla PK, Jacob S, Adatiya MD, Dhameliya TM, Ranch KM, Tiwari AK. Polyamide/Poly(Amino Acid) Polymers for Drug Delivery. J Funct Biomater 2021; 12:58. [PMID: 34698184 PMCID: PMC8544418 DOI: 10.3390/jfb12040058] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2021] [Revised: 09/29/2021] [Accepted: 10/01/2021] [Indexed: 12/29/2022] Open
Abstract
Polymers have always played a critical role in the development of novel drug delivery systems by providing the sustained, controlled and targeted release of both hydrophobic and hydrophilic drugs. Among the different polymers, polyamides or poly(amino acid)s exhibit distinct features such as good biocompatibility, slow degradability and flexible physicochemical modification. The degradation rates of poly(amino acid)s are influenced by the hydrophilicity of the amino acids that make up the polymer. Poly(amino acid)s are extensively used in the formulation of chemotherapeutics to achieve selective delivery for an appropriate duration of time in order to lessen the drug-related side effects and increase the anti-tumor efficacy. This review highlights various poly(amino acid) polymers used in drug delivery along with new developments in their utility. A thorough discussion on anticancer agents incorporated into poly(amino acid) micellar systems that are under clinical evaluation is included.
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Affiliation(s)
- Sai H. S. Boddu
- Department of Pharmaceutical Sciences, College of Pharmacy and Health Sciences, Ajman University, Ajman P.O. Box 346, United Arab Emirates
- Center of Medical and Bio-Allied Health Sciences Research, Ajman University, Ajman P.O. Box 346, United Arab Emirates;
| | - Prakash Bhagav
- Advanced Drug Delivery Research and Development, Sampann Research and Development, Panacea Biotec Ltd., Ambala, Chandigarh Highway, Lalru 140501, India;
| | - Pradeep K. Karla
- Department of Pharmaceutical Sciences, College of Pharmacy, Howard University, 2300 4th St. N.W., Washington, DC 20059, USA
| | - Shery Jacob
- Department of Pharmaceutical Sciences, College of Pharmacy, Gulf Medical University, Ajman 4184, United Arab Emirates;
| | - Mansi D. Adatiya
- Lallubhai Motilal College of Pharmacy, Navrangpura, Ahmedabad 380009, India; (M.D.A.); (T.M.D.); (K.M.R.)
| | - Tejas M. Dhameliya
- Lallubhai Motilal College of Pharmacy, Navrangpura, Ahmedabad 380009, India; (M.D.A.); (T.M.D.); (K.M.R.)
| | - Ketan M. Ranch
- Lallubhai Motilal College of Pharmacy, Navrangpura, Ahmedabad 380009, India; (M.D.A.); (T.M.D.); (K.M.R.)
| | - Amit K. Tiwari
- Center of Medical and Bio-Allied Health Sciences Research, Ajman University, Ajman P.O. Box 346, United Arab Emirates;
- Department of Pharmacology & Experimental Therapeutics, Health Science Campus, The University of Toledo, 3000 Arlington Ave., Toledo, OH 43614, USA
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19
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Arora G, Maman P, Sharma A, Verma N, Puri V. Systemic Overview of Microstrip Patch Antenna's for Different Biomedical Applications. Adv Pharm Bull 2021; 11:439-449. [PMID: 34513618 PMCID: PMC8421620 DOI: 10.34172/apb.2021.051] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2019] [Revised: 06/16/2020] [Accepted: 06/30/2020] [Indexed: 02/01/2023] Open
Abstract
Timely diagnosis is the most important parameter for the detection and hindrance with tissues (infected). Many conventional techniques are used for the determination of the chronic disease like MRI, X-ray, mammography, ultrasound and other diagnosing methods. Nevertheless, they have some limitations. We epitomize between 4 and 34 % of all carcinogenic tissues are lacking because of weak, in adequate malignant/benign cancer tissue on the contrary. So, an effective alternative method is the valid concern in the field of medical right now. Imaging with the help of patch antenna to detect chronic disease like breast cancer, oxidative stress syndrome etc. it has been proved to be a suitable potential method, and there are many works in this area. All materials have different conductivity and permittivity. With the help of these antennas, a 3D tissue structure which has different conductivity and permittivity is modelled in high-frequency structure simulator through finite element method which resolves electromagnetic field values and a microstrip patch antenna operation process. As compared with conventional antennas, micro strip patch antennas have enhanced benefits and better prospects. An integrated Antenna plays an important or crucial role for supporting many applications in biomedical, commercial and in military fields. The Antenna designed for these applications should be wideband, not sensitive to the human body. In this present review, the precise application of the Antenna in different biomedical aspects is considered. Furthermore, the author has also discussed the analytical results using simulation models and experimental results for some of the significantdisease.
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Affiliation(s)
- Govind Arora
- Chitkara College of Pharmacy, Chitkara University, Punjab, India
| | | | - Ameya Sharma
- Chitkara University School of Pharmacy, Chitkara University, Himachal Pradesh, India
| | - Nitin Verma
- Chitkara University School of Pharmacy, Chitkara University, Himachal Pradesh, India
| | - Vivek Puri
- Chitkara University School of Pharmacy, Chitkara University, Himachal Pradesh, India
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20
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Zhong H, Deng J. Preparation and Chiral Applications of Optically Active Polyamides. Macromol Rapid Commun 2021; 42:e2100341. [PMID: 34347330 DOI: 10.1002/marc.202100341] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/02/2021] [Revised: 07/05/2021] [Indexed: 12/24/2022]
Abstract
Chirality is omnipresent in nature and plays vital roles in living organism, and has become a hot research topic across multidisciplinary fields including chemistry, biology, physics, and material science. Meanwhile, polyamides constitute an important class of polymers and have received significant attention owing to their outstanding properties and wide-ranging applications in many areas. Judiciously introducing chirality into polyamides will undoubtedly obtain attractive chiral polymers, namely, optically active polyamides. This review describes the preparation methods of chiral polyamides, including solution polycondensation, interfacial polycondensation, ring-open polymerization, and others; the newly emerging categories of chiral polyamides, i.e., helical polyamides, chiral polyamide-imides, are also presented. The applications of optically active polyamides in chiral research fields including asymmetric catalysis, membrane separation, and enantioselective crystallization are also summarized. In addition, current challenges in chiral polyamides are further presented and future perspectives in the field are proposed.
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Affiliation(s)
- Hai Zhong
- State Key Laboratory of Chemical Resource Engineering and College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
| | - Jianping Deng
- State Key Laboratory of Chemical Resource Engineering and College of Materials Science and Engineering, Beijing University of Chemical Technology, Beijing, 100029, China
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21
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The Optimization of Alternating Current Electrospun PA 6 Solutions Using a Visual Analysis System. Polymers (Basel) 2021; 13:polym13132098. [PMID: 34202197 PMCID: PMC8271821 DOI: 10.3390/polym13132098] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/27/2021] [Revised: 06/16/2021] [Accepted: 06/24/2021] [Indexed: 12/31/2022] Open
Abstract
The electrospinning process that produces fine nanofibrous materials have a major disadvantage in the area of productivity. However, alternating current (AC) electrospinning might help to solve the problem via the modification of high voltage signal. The aforementioned productivity aspect can be observed via a camera system that focuses on the jet creation area and that measures the average lifespan. The paper describes the optimization of polyamide 6 (PA 6) solutions and demonstrates the change in the behavior of the process following the addition of a minor dose of oxoacid. This addition served to convert the previously unspinnable (using AC) solution to a high-quality electrospinning solution. The visual analysis of the AC electrospinning of polymeric solutions using a high-speed camera and a programmable power source was chosen as the method for the evaluation of the quality of the process. The solutions were exposed to high voltage applying two types of AC signal, i.e., the sine wave and the step change. All the recordings presented in the paper contained two sets of data: firstly, camera recordings that showed the visual expression of electrospinning and, secondly, signal recordings that provided information on the data position in the signal function.
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22
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Shakiba M, Rezvani Ghomi E, Khosravi F, Jouybar S, Bigham A, Zare M, Abdouss M, Moaref R, Ramakrishna S. Nylon—A material introduction and overview for biomedical applications. POLYM ADVAN TECHNOL 2021. [DOI: 10.1002/pat.5372] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Affiliation(s)
| | - Erfan Rezvani Ghomi
- Center for Nanotechnology and Sustainability, Department of Mechanical Engineering Faculty of Engineering, National University of Singapore Singapore Singapore
| | - Fatemeh Khosravi
- Center for Nanotechnology and Sustainability, Department of Mechanical Engineering Faculty of Engineering, National University of Singapore Singapore Singapore
| | - Shirzad Jouybar
- Department of Chemistry Amirkabir University of Technology Tehran Iran
| | - Ashkan Bigham
- Institute of Polymers, Composites and Biomaterials—National Research Council (IPCB‐CNR) Naples Italy
| | - Mina Zare
- Center for Nanotechnology and Sustainability, Department of Mechanical Engineering Faculty of Engineering, National University of Singapore Singapore Singapore
| | - Majid Abdouss
- Department of Chemistry Amirkabir University of Technology Tehran Iran
| | - Roxana Moaref
- Department of Polymer Engineering Amirkabir University of Technology Tehran Iran
| | - Seeram Ramakrishna
- Center for Nanotechnology and Sustainability, Department of Mechanical Engineering Faculty of Engineering, National University of Singapore Singapore Singapore
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23
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Deng X, Zhou G, Tian J, Srinivasan R. Chemoselective Amide-Forming Ligation Between Acylsilanes and Hydroxylamines Under Aqueous Conditions. Angew Chem Int Ed Engl 2021; 60:7024-7029. [PMID: 33135292 DOI: 10.1002/anie.202012459] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2020] [Revised: 10/19/2020] [Indexed: 12/20/2022]
Abstract
We report the facile amide-forming ligation of acylsilanes with hydroxylamines (ASHA ligation) under aqueous conditions. The ligation is fast, chemoselective, mild, high-yielding and displays excellent functional-group tolerance. Late-stage modifications of an array of marketed drugs, peptides, natural products, and biologically active compounds showcase the robustness and functional-group tolerance of the reaction. The key to the success of the reaction could be the possible formation of the strong Si-O bond via a Brook-type rearrangement. Given its simplicity and efficiency, this ligation has the potential to unfold new applications in the areas of medicinal chemistry and chemical biology.
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Affiliation(s)
- Xingwang Deng
- School of Pharmaceutical Science and Technology (SPST), Tianjin University, 92 Weijin Road, Building 24, Nankai District, Tianjin, 300072, P. R. China
| | - Guan Zhou
- School of Pharmaceutical Science and Technology (SPST), Tianjin University, 92 Weijin Road, Building 24, Nankai District, Tianjin, 300072, P. R. China
| | - Jing Tian
- School of Pharmaceutical Science and Technology (SPST), Tianjin University, 92 Weijin Road, Building 24, Nankai District, Tianjin, 300072, P. R. China
| | - Rajavel Srinivasan
- School of Pharmaceutical Science and Technology (SPST), Tianjin University, 92 Weijin Road, Building 24, Nankai District, Tianjin, 300072, P. R. China
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Coppari S, Ramakrishna S, Teodori L, Albertini MC. Cell signalling and biomaterials have a symbiotic relationship as demonstrated by a bioinformatics study: The role of surface topography. CURRENT OPINION IN BIOMEDICAL ENGINEERING 2021. [DOI: 10.1016/j.cobme.2020.09.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
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25
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Lencova S, Svarcova V, Stiborova H, Demnerova K, Jencova V, Hozdova K, Zdenkova K. Bacterial Biofilms on Polyamide Nanofibers: Factors Influencing Biofilm Formation and Evaluation. ACS APPLIED MATERIALS & INTERFACES 2021; 13:2277-2288. [PMID: 33284019 DOI: 10.1021/acsami.0c19016] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/12/2023]
Abstract
Electrospun polyamide (PA) nanofibers have great potential for medical applications (in dermatology as antimicrobial compound carriers or surgical sutures). However, little is known about microbial colonization on these materials. Suitable methods need to be chosen and optimized for the analysis of biofilms formed on nanofibers and the influence of their morphology on biofilm formation. We analyzed 11 PA nanomaterials, both nonfunctionalized and functionalized with AgNO3, and tested the formation of a biofilm by clinically relevant bacteria (Escherichia coli CCM 4517, Staphylococcus aureus CCM 3953, and Staphylococcus epidermidis CCM 4418). By four different methods, it was confirmed that all of these bacteria attached to the PAs and formed biofilms; however, it was found that the selected method can influence the outcomes. For studying biofilms formed by the selected bacteria, scanning electron microscopy, resazurin staining, and colony-forming unit enumeration provided appropriate and comparable results. The values obtained by crystal violet (CV) staining were misleading due to the binding of the CV dye to the PA structure. In addition, the effect of nanofiber morphology parameters (fiber diameter and air permeability) and AgNO3 functionalization significantly influenced biofilm maturation. Furthermore, the correlations between air permeability and surface density and fiber diameter were revealed. Based on the statistical analysis, fiber diameter was confirmed as a crucial factor influencing biofilm formation (p ≤ 0.01). The functionalization of PAs with AgNO3 (from 0.1 wt %) effectively suppressed biofilm formation. The PA functionalized with a concentration of 0.1 wt % AgNO3 influenced the biofilm equally as nonfunctionalized PA 8% 2 g/m2. Therefore, biofilm formation could be affected by the above-mentioned morphology parameters, and ultimately, the risk of infections from contaminated medical devices could be reduced.
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Affiliation(s)
- Simona Lencova
- Faculty of Food and Biochemical Technology, Department of Biochemistry and Microbiology, University of Chemistry and Technology, Prague, Technicka 3, Prague 6 16628, Czech Republic
| | - Viviana Svarcova
- Faculty of Food and Biochemical Technology, Department of Biochemistry and Microbiology, University of Chemistry and Technology, Prague, Technicka 3, Prague 6 16628, Czech Republic
| | - Hana Stiborova
- Faculty of Food and Biochemical Technology, Department of Biochemistry and Microbiology, University of Chemistry and Technology, Prague, Technicka 3, Prague 6 16628, Czech Republic
| | - Katerina Demnerova
- Faculty of Food and Biochemical Technology, Department of Biochemistry and Microbiology, University of Chemistry and Technology, Prague, Technicka 3, Prague 6 16628, Czech Republic
| | - Vera Jencova
- Faculty of Science, Humanities and Education, Technical University of Liberec, Studentska 1402/2, Liberec 1 461 17, Czech Republic
| | | | - Kamila Zdenkova
- Faculty of Food and Biochemical Technology, Department of Biochemistry and Microbiology, University of Chemistry and Technology, Prague, Technicka 3, Prague 6 16628, Czech Republic
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Mori H, Naka R, Fujita M, Hara M. Nylon mesh-based 3D scaffolds for the adherent culture of neural stem/progenitor cells. J Biosci Bioeng 2021; 131:442-452. [PMID: 33461887 DOI: 10.1016/j.jbiosc.2020.12.003] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/18/2020] [Revised: 12/09/2020] [Accepted: 12/09/2020] [Indexed: 12/22/2022]
Abstract
We developed novel scaffolds for the adherent culture of neural stem/progenitor cells on the woven mesh. Nylon mesh (NM) is an inert material for cell adhesion. We prepared polyacrylic acid-grafted nylon mesh (PAA-NM) by graft polymerization method using gamma-irradiation. Matrigel was covalently immobilized to the carboxyl groups in PAA-NM by chemical conjugation using 1-ethyl-3-(3-dimethylamino propyl) carbodiimide (EDC) and N-hydroxysuccinimide (NHS) to prepare the Matrigel-immobilized PAA-grafted nylon mesh (M-PAA-NM). Cell adhesion property of mouse neural stem/progenitor cells (NSPCs) between the NM, PAA-NM, and M-PAA-NM was different from each other. The neurosphere-like clusters of NSPCs were weakly bound to NM and PAA-NM without spreading. The NSPCs were firmly adhered to, spread, and covered the surface of M-PAA-NM. We evaluated the state of differentiation by quantitative reverse transcriptase-polymerase chain reaction (RT-PCR) and immnocytochemistry. A neuronal marker β III tubulin, a glial marker glial fibrillary acidic protein (GFAP) and a mature glial marker S100β were expressed at a low level in the cultured cells while immature NSPCs marker Nestin and Sox2 were slightly lower without significant statistical difference. We concluded that the M-PAA-NM is a good substrate for adherent culture of NSPCs without triggering their cell differentiation, and also provides the maintenance of their growth with fewer passages in comparison with the conventional suspension culture of NSPCs in neurospheres.
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Affiliation(s)
- Hideki Mori
- Department of Biological Science, Graduate School of Science, Osaka Prefecture University, 1-2 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8570, Japan
| | - Ryosuke Naka
- Department of Biological Science, Graduate School of Science, Osaka Prefecture University, 1-2 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8570, Japan
| | - Masanori Fujita
- Department of Biological Science, Graduate School of Science, Osaka Prefecture University, 1-2 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8570, Japan
| | - Masayuki Hara
- Department of Biological Science, Graduate School of Science, Osaka Prefecture University, 1-2 Gakuen-cho, Naka-ku, Sakai, Osaka 599-8570, Japan.
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27
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Deng X, Zhou G, Tian J, Srinivasan R. Chemoselective Amide‐Forming Ligation Between Acylsilanes and Hydroxylamines Under Aqueous Conditions. Angew Chem Int Ed Engl 2020. [DOI: 10.1002/ange.202012459] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Xingwang Deng
- School of Pharmaceutical Science and Technology (SPST) Tianjin University 92 Weijin Road, Building 24, Nankai District Tianjin 300072 P. R. China
| | - Guan Zhou
- School of Pharmaceutical Science and Technology (SPST) Tianjin University 92 Weijin Road, Building 24, Nankai District Tianjin 300072 P. R. China
| | - Jing Tian
- School of Pharmaceutical Science and Technology (SPST) Tianjin University 92 Weijin Road, Building 24, Nankai District Tianjin 300072 P. R. China
| | - Rajavel Srinivasan
- School of Pharmaceutical Science and Technology (SPST) Tianjin University 92 Weijin Road, Building 24, Nankai District Tianjin 300072 P. R. China
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28
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Seguela R. Overview and critical survey of polyamide6 structural habits: Misconceptions and controversies. JOURNAL OF POLYMER SCIENCE 2020. [DOI: 10.1002/pol.20200454] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
Affiliation(s)
- Roland Seguela
- Centre National de la Recherche Scientifique MATEIS, INSA de Lyon, CNRS ‐ UMR 5510, Université de Lyon, Campus LyonTech La Doua Villeurbanne France
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29
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Paez-Mayorga J, Capuani S, Hernandez N, Farina M, Chua CYX, Blanchard R, Sizovs A, Liu HC, Fraga DW, Niles JA, Salazar HF, Corradetti B, Sikora AG, Kloc M, Li XC, Gaber AO, Nichols JE, Grattoni A. Neovascularized implantable cell homing encapsulation platform with tunable local immunosuppressant delivery for allogeneic cell transplantation. Biomaterials 2020; 257:120232. [DOI: 10.1016/j.biomaterials.2020.120232] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Revised: 07/08/2020] [Accepted: 07/09/2020] [Indexed: 01/10/2023]
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Paez‐Mayorga J, Capuani S, Farina M, Lotito ML, Niles JA, Salazar HF, Rhudy J, Esnaola L, Chua CYX, Taraballi F, Corradetti B, Shelton KA, Nehete PN, Nichols JE, Grattoni A. Enhanced In Vivo Vascularization of 3D-Printed Cell Encapsulation Device Using Platelet-Rich Plasma and Mesenchymal Stem Cells. Adv Healthc Mater 2020; 9:e2000670. [PMID: 32864893 DOI: 10.1002/adhm.202000670] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2020] [Revised: 07/25/2020] [Indexed: 12/14/2022]
Abstract
The current standard for cell encapsulation platforms is enveloping cells in semipermeable membranes that physically isolate transplanted cells from the host while allowing for oxygen and nutrient diffusion. However, long-term viability and function of encapsulated cells are compromised by insufficient oxygen and nutrient supply to the graft. To address this need, a strategy to achieve enhanced vascularization of a 3D-printed, polymeric cell encapsulation platform using platelet-rich plasma (PRP) and mesenchymal stem cells (MSCs) is investigated. The study is conducted in rats and, for clinical translation relevance, in nonhuman primates (NHP). Devices filled with PRP, MSCs, or vehicle hydrogel are subcutaneously implanted in rats and NHP and the amount and maturity of penetrating blood vessels assessed via histopathological analysis. In rats, MSCs drive the strongest angiogenic response at early time points, with the highest vessel density and endothelial nitric oxide synthase (eNOS) expression. In NHP, PRP and MSCs result in similar vessel densities but incorporation of PRP ensues higher levels of eNOS expression. Overall, enrichment with PRP and MSCs yields extensive, mature vascularization of subcutaneous cell encapsulation devices. It is postulated that the individual properties of PRP and MSCs can be leveraged in a synergistic approach for maximal vascularization of cell encapsulation platforms.
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Affiliation(s)
- Jesus Paez‐Mayorga
- Department of Nanomedicine Houston Methodist Research Institute Houston TX 77030 USA
- School of Medicine and Health Sciences Tecnologico de Monterrey Monterrey NL 64849 Mexico
| | - Simone Capuani
- Department of Nanomedicine Houston Methodist Research Institute Houston TX 77030 USA
| | - Marco Farina
- Department of Nanomedicine Houston Methodist Research Institute Houston TX 77030 USA
- Department of Electronics and Telecommunications Politecnico di Torino Torino TO 10129 Italy
| | - Maria Luisa Lotito
- Department of Nanomedicine Houston Methodist Research Institute Houston TX 77030 USA
- Department of Mechanical and Aerospace Engineering Politecnico di Torino Torino TO 10129 Italy
| | - Jean A. Niles
- University of Texas Medical Branch Galveston TX 77550 USA
| | - Hector F. Salazar
- Department of Nanomedicine Houston Methodist Research Institute Houston TX 77030 USA
| | - Jessica Rhudy
- Department of Nanomedicine Houston Methodist Research Institute Houston TX 77030 USA
| | - Lucas Esnaola
- Department of Nanomedicine Houston Methodist Research Institute Houston TX 77030 USA
| | | | - Francesca Taraballi
- Regenerative Medicine Program Houston Methodist Research Institute Houston TX 77030 USA
- Orthopedics and Sports Medicine Houston Methodist Hospital Houston TX 77030 USA
| | - Bruna Corradetti
- Department of Nanomedicine Houston Methodist Research Institute Houston TX 77030 USA
- Center for NanoHealth Swansea University Medical School Swansea Wales SA2 8QA UK
| | - Kathryn A. Shelton
- Department of Comparative Medicine Michael E. Keeling Center for Comparative Medicine and Research MD Anderson Cancer Center Bastrop TX 78602 USA
| | - Pramod N. Nehete
- Department of Comparative Medicine Michael E. Keeling Center for Comparative Medicine and Research MD Anderson Cancer Center Bastrop TX 78602 USA
- The University of Texas Graduate School of Biomedical Sciences at Houston Houston TX 77030 USA
| | | | - Alessandro Grattoni
- Department of Nanomedicine Houston Methodist Research Institute Houston TX 77030 USA
- Department of Surgery Houston Methodist Hospital Houston TX 77030 USA
- Department of Radiation Oncology Houston Methodist Hospital Houston TX 77030 USA
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31
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Xie J, Li X, Kleij AW. Pd-catalyzed stereoselective tandem ring-opening amination/cyclization of vinyl γ-lactones: access to caprolactam diversity. Chem Sci 2020; 11:8839-8845. [PMID: 34123137 PMCID: PMC8163440 DOI: 10.1039/d0sc03647a] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Accepted: 08/06/2020] [Indexed: 11/25/2022] Open
Abstract
A stereoselective amination/cyclization cascade process has been developed that allows for the preparation of a series of unsaturated and substituted caprolactam derivatives in good yields. This conceptually novel protocol takes advantage of the easy access and modular character of vinyl γ-lactones that can be prepared from simple precursors. Activation of the lactone substrate in the presence of a suitable Pd precursor and newly developed phosphoramidite ligand offers a stereocontrolled ring-opening/allylic amination manifold under ambient conditions. The intermediate (E)-configured ε-amino acid can be cyclized using a suitable dehydrating agent in an efficient one-pot, two-step sequence. This overall highly chemo-, stereo- and regio-selective transformation streamlines the production of a wide variety of modifiable and valuable caprolactam building blocks in an operationally attractive way.
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Affiliation(s)
- Jianing Xie
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology Av. Països Catalans 16 43007-Tarragona Spain
| | - Xuetong Li
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology Av. Països Catalans 16 43007-Tarragona Spain
| | - Arjan W Kleij
- Institute of Chemical Research of Catalonia (ICIQ), The Barcelona Institute of Science and Technology Av. Països Catalans 16 43007-Tarragona Spain
- Catalan Institute of Research and Advanced Studies (ICREA) Pg. Lluís Companys 23 08010 Barcelona Spain
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32
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Izraylit V, Hommes-Schattmann PJ, Neffe AT, Gould OE, Lendlein A. Polyester urethane functionalizable through maleimide side-chains and cross-linkable by polylactide stereocomplexes. Eur Polym J 2020. [DOI: 10.1016/j.eurpolymj.2020.109916] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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33
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Lutzweiler G, Ndreu Halili A, Engin Vrana N. The Overview of Porous, Bioactive Scaffolds as Instructive Biomaterials for Tissue Regeneration and Their Clinical Translation. Pharmaceutics 2020; 12:E602. [PMID: 32610440 PMCID: PMC7407612 DOI: 10.3390/pharmaceutics12070602] [Citation(s) in RCA: 70] [Impact Index Per Article: 17.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/10/2020] [Revised: 06/08/2020] [Accepted: 06/23/2020] [Indexed: 12/20/2022] Open
Abstract
Porous scaffolds have been employed for decades in the biomedical field where researchers have been seeking to produce an environment which could approach one of the extracellular matrixes supporting cells in natural tissues. Such three-dimensional systems offer many degrees of freedom to modulate cell activity, ranging from the chemistry of the structure and the architectural properties such as the porosity, the pore, and interconnection size. All these features can be exploited synergistically to tailor the cell-material interactions, and further, the tissue growth within the voids of the scaffold. Herein, an overview of the materials employed to generate porous scaffolds as well as the various techniques that are used to process them is supplied. Furthermore, scaffold parameters which modulate cell behavior are identified under distinct aspects: the architecture of inert scaffolds (i.e., pore and interconnection size, porosity, mechanical properties, etc.) alone on cell functions followed by comparison with bioactive scaffolds to grasp the most relevant features driving tissue regeneration. Finally, in vivo outcomes are highlighted comparing the accordance between in vitro and in vivo results in order to tackle the future translational challenges in tissue repair and regeneration.
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Affiliation(s)
- Gaëtan Lutzweiler
- Institut National de la Santé et de la Recherche Medicale, UMR_S 1121, 11 rue Humann, 67085 Strasbourg CEDEX, France
| | - Albana Ndreu Halili
- Department of Information Technology, Aleksander Moisiu University, 2001 Durres, Albania;
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34
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Worch JC, Weems AC, Yu J, Arno MC, Wilks TR, Huckstepp RTR, O'Reilly RK, Becker ML, Dove AP. Elastomeric polyamide biomaterials with stereochemically tuneable mechanical properties and shape memory. Nat Commun 2020; 11:3250. [PMID: 32591525 PMCID: PMC7320000 DOI: 10.1038/s41467-020-16945-8] [Citation(s) in RCA: 37] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/29/2019] [Accepted: 05/27/2020] [Indexed: 12/14/2022] Open
Abstract
Biocompatible polymers are widely used in tissue engineering and biomedical device applications. However, few biomaterials are suitable for use as long-term implants and these examples usually possess limited property scope, can be difficult to process, and are non-responsive to external stimuli. Here, we report a class of easily processable polyamides with stereocontrolled mechanical properties and high-fidelity shape memory behaviour. We synthesise these materials using the efficient nucleophilic thiol-yne reaction between a dipropiolamide and dithiol to yield an α,β - unsaturated carbonyl moiety along the polymer backbone. By rationally exploiting reaction conditions, the alkene stereochemistry is modulated between 35-82% cis content and the stereochemistry dictates the bulk material properties such as tensile strength, modulus, and glass transition. Further access to materials possessing a broader range of thermal and mechanical properties is accomplished by polymerising a variety of commercially available dithiols with the dipropiolamide monomer.
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Affiliation(s)
- Joshua C Worch
- School of Chemistry, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
| | - Andrew C Weems
- School of Chemistry, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
| | - Jiayi Yu
- Department of Polymer Science, The University of Akron, Akron, OH, 44325, USA
| | - Maria C Arno
- School of Chemistry, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
| | - Thomas R Wilks
- School of Chemistry, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
| | | | - Rachel K O'Reilly
- School of Chemistry, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK
| | - Matthew L Becker
- Department of Chemistry, Department of Mechanical Engineering & Materials Science, Department of Orthopaedic Surgery, Duke University, 308 Research Drive, Durham, NC, 27708, USA.
| | - Andrew P Dove
- School of Chemistry, University of Birmingham, Edgbaston, Birmingham, B15 2TT, UK.
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35
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Winnacker M, Lamparelli DH, Capacchione C, Güngör HH, Stieglitz L, Rodewald KS, Schmidt M, Gronauer TF. Sustainable Polyesteramides and Copolyamides: Insights into the Copolymerization Behavior of Terpene‐Based Lactams. MACROMOL CHEM PHYS 2020. [DOI: 10.1002/macp.202000110] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
Affiliation(s)
- Malte Winnacker
- WACKER‐Chair of Macromolecular ChemistryTechnical University of MunichLichtenbergstraße 4, Garching bei München and Catalysis Research Center (CRC) Ernst‐Otto‐Fischer‐Straße 1 Garching bei München 85748 Germany
| | - David H. Lamparelli
- Dipartimento di Chimica e Biologia “A. Zambelli”Universitá degli Studi di Salerno via Giovanni Paolo II Fisciano SA 132 I‐84084 Italy
| | - Carmine Capacchione
- Dipartimento di Chimica e Biologia “A. Zambelli”Universitá degli Studi di Salerno via Giovanni Paolo II Fisciano SA 132 I‐84084 Italy
| | - Hicran H. Güngör
- WACKER‐Chair of Macromolecular ChemistryTechnical University of MunichLichtenbergstraße 4, Garching bei München and Catalysis Research Center (CRC) Ernst‐Otto‐Fischer‐Straße 1 Garching bei München 85748 Germany
| | - Lucas Stieglitz
- WACKER‐Chair of Macromolecular ChemistryTechnical University of MunichLichtenbergstraße 4, Garching bei München and Catalysis Research Center (CRC) Ernst‐Otto‐Fischer‐Straße 1 Garching bei München 85748 Germany
| | - Katia S. Rodewald
- WACKER‐Chair of Macromolecular ChemistryTechnical University of MunichLichtenbergstraße 4, Garching bei München and Catalysis Research Center (CRC) Ernst‐Otto‐Fischer‐Straße 1 Garching bei München 85748 Germany
| | - Matthias Schmidt
- WACKER‐Chair of Macromolecular ChemistryTechnical University of MunichLichtenbergstraße 4, Garching bei München and Catalysis Research Center (CRC) Ernst‐Otto‐Fischer‐Straße 1 Garching bei München 85748 Germany
| | - Thomas F. Gronauer
- Chair of Organic Chemistry IITechnische Universität München Lichtenbergstraße 4 Garching bei München 85748 Germany
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36
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Krysiak ZJ, Gawlik MZ, Knapczyk-Korczak J, Kaniuk Ł, Stachewicz U. Hierarchical Composite Meshes of Electrospun PS Microfibers with PA6 Nanofibers for Regenerative Medicine. MATERIALS (BASEL, SWITZERLAND) 2020; 13:E1974. [PMID: 32340243 PMCID: PMC7216289 DOI: 10.3390/ma13081974] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 03/30/2020] [Revised: 04/19/2020] [Accepted: 04/21/2020] [Indexed: 01/05/2023]
Abstract
One of the most frequently applied polymers in regenerative medicine is polystyrene (PS), which is commonly used as a flat surface and requires surface modifications for cell culture study. Here, hierarchical composite meshes were fabricated via electrospinning PS with nylon 6 (PA6) to obtain enhanced cell proliferation, development, and integration with nondegradable polymer fibers. The biomimetic approach of designed meshes was verified with a scanning electron microscope (SEM) and MTS assay up to 7 days of cell culture. In particular, adding PA6 nanofibers changes the fibroblast attachment to meshes and their development, which can be observed by cell flattening, filopodia formation, and spreading. The proposed single-step manufacturing of meshes controlled the surface properties and roughness of produced composites, allowing governing cell behavior. Within this study, we show the alternative engineering of nondegradable meshes without post-treatment steps, which can be used in various applications in regenerative medicine.
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Affiliation(s)
| | | | | | | | - Urszula Stachewicz
- International Center of Electron Microscopy for Material Science, Faculty of Metals Engineering and Industrial Computer Science, AGH University of Science and Technology, 30-059 Cracow, Poland; (Z.J.K.); (M.Z.G.); (J.K.-K.); (Ł.K.)
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37
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Hou J, Chen L, Zhou M, Li J, Liu J, Fang H, Zeng Y, Sun J, Wang Z. Multi-Layered Polyamide/Collagen Scaffolds with Topical Sustained Release of N-Acetylcysteine for Promoting Wound Healing. Int J Nanomedicine 2020; 15:1349-1361. [PMID: 32184590 PMCID: PMC7053812 DOI: 10.2147/ijn.s232190] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2019] [Accepted: 02/01/2020] [Indexed: 12/16/2022] Open
Abstract
Background Impaired wound healing might be associated with many issues, especially overactive of reactive oxygen species (ROS), deficiency of blood vessels and immature of epidermis. N-acetylcysteine (NAC), as an antioxidant, could solve these problems by inhibiting overreactive of ROS, promoting revascularization and accelerating re-epithelialization. How to deliver NAC in situ with a controllable releasing speed still remain a challenge. Materials and Methods In this study, we combined collagen (Col) with N-acetylcysteine to perform the characteristics of sustained release and chemically crosslinked Col/NAC composite with polyamide (PA) nanofibers to enhance the mechanical property of collagen and fabricated this multi-layered scaffold (PA-Col/NAC scaffold). The physical properties of the scaffolds such as surface characteristics, water absorption and tensile modulus were tested. Meanwhile, the ability to promote wound healing in vitro and in vivo were investigated. Results These scaffolds were porous and performed great water absorption. The PA-Col/NAC scaffold could sustainably release NAC for at least 14 days. After cell implantation, PA-Col/NAC scaffold showed better cell proliferation and cell migration than the other groups. In vivo, PA-Col/NAC scaffolds could promote wound healing best among all the groups. Conclusion The multi-layered scaffolds could obviously accelerate the process of wound healing and exert better and prolonged effects.
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Affiliation(s)
- Jinfei Hou
- Department of Plastic Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, People's Republic of China.,Wuhan Clinical Research Center for Superficial Organ Reconstruction, Wuhan 430022, China
| | - Lifeng Chen
- Department of Plastic Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, People's Republic of China.,Wuhan Clinical Research Center for Superficial Organ Reconstruction, Wuhan 430022, China
| | - Muran Zhou
- Department of Plastic Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, People's Republic of China.,Wuhan Clinical Research Center for Superficial Organ Reconstruction, Wuhan 430022, China
| | - Jialun Li
- Department of Plastic Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, People's Republic of China.,Wuhan Clinical Research Center for Superficial Organ Reconstruction, Wuhan 430022, China
| | - Jian Liu
- Department of Plastic Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, People's Republic of China.,Wuhan Clinical Research Center for Superficial Organ Reconstruction, Wuhan 430022, China
| | - Huimin Fang
- Department of Plastic Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, People's Republic of China.,Wuhan Clinical Research Center for Superficial Organ Reconstruction, Wuhan 430022, China
| | - Yuyang Zeng
- Department of Plastic Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, People's Republic of China.,Wuhan Clinical Research Center for Superficial Organ Reconstruction, Wuhan 430022, China
| | - Jiaming Sun
- Department of Plastic Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, People's Republic of China.,Wuhan Clinical Research Center for Superficial Organ Reconstruction, Wuhan 430022, China
| | - Zhenxing Wang
- Department of Plastic Surgery, Union Hospital, Tongji Medical College, Huazhong University of Science and Technology, Wuhan 430022, People's Republic of China.,Wuhan Clinical Research Center for Superficial Organ Reconstruction, Wuhan 430022, China
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38
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Rosso AP, Martinelli M. Preparation and characterization of dendronized chitosan/gelatin-based nanogels. Eur Polym J 2020. [DOI: 10.1016/j.eurpolymj.2020.109506] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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39
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Sulfonated aromatic polyamide as water-soluble polymeric corrosion inhibitor of copper in HCl. Colloids Surf A Physicochem Eng Asp 2019. [DOI: 10.1016/j.colsurfa.2019.123626] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
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40
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Espona-Noguera A, Ciriza J, Cañibano-Hernández A, Villa R, Saenz del Burgo L, Alvarez M, Pedraz JL. 3D printed polyamide macroencapsulation devices combined with alginate hydrogels for insulin-producing cell-based therapies. Int J Pharm 2019; 566:604-614. [DOI: 10.1016/j.ijpharm.2019.06.009] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2019] [Revised: 05/14/2019] [Accepted: 06/04/2019] [Indexed: 12/23/2022]
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41
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Winnacker M, Beringer AJG, Gronauer TF, Güngör HH, Reinschlüssel L, Rieger B, Sieber SA. Polyamide/PEG Blends as Biocompatible Biomaterials for the Convenient Regulation of Cell Adhesion and Growth. Macromol Rapid Commun 2019; 40:e1900091. [DOI: 10.1002/marc.201900091] [Citation(s) in RCA: 23] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/25/2019] [Revised: 03/25/2019] [Indexed: 01/03/2023]
Affiliation(s)
- Malte Winnacker
- WACKER‐Lehrstuhl für Makromolekulare ChemieLichtenbergstraße 4Department of ChemistryTechnische Universität München 85747 Garching bei München Germany
- Catalysis Research CenterTechnische Universität München Ernst‐Otto‐Fischer‐Straße 1 85748 Garching bei München Germany
| | - Andreas J. G. Beringer
- WACKER‐Lehrstuhl für Makromolekulare ChemieLichtenbergstraße 4Department of ChemistryTechnische Universität München 85747 Garching bei München Germany
- Catalysis Research CenterTechnische Universität München Ernst‐Otto‐Fischer‐Straße 1 85748 Garching bei München Germany
- Department of ChemistryLudwig‐Maximilians‐Universität München
| | - Thomas F. Gronauer
- WACKER‐Lehrstuhl für Makromolekulare ChemieLichtenbergstraße 4Department of ChemistryTechnische Universität München 85747 Garching bei München Germany
- Catalysis Research CenterTechnische Universität München Ernst‐Otto‐Fischer‐Straße 1 85748 Garching bei München Germany
- Chair of Organic Chemistry IITechnische Universität München
| | - Hicran H. Güngör
- WACKER‐Lehrstuhl für Makromolekulare ChemieLichtenbergstraße 4Department of ChemistryTechnische Universität München 85747 Garching bei München Germany
- Catalysis Research CenterTechnische Universität München Ernst‐Otto‐Fischer‐Straße 1 85748 Garching bei München Germany
| | - Leonhard Reinschlüssel
- WACKER‐Lehrstuhl für Makromolekulare ChemieLichtenbergstraße 4Department of ChemistryTechnische Universität München 85747 Garching bei München Germany
- Catalysis Research CenterTechnische Universität München Ernst‐Otto‐Fischer‐Straße 1 85748 Garching bei München Germany
| | - Bernhard Rieger
- WACKER‐Lehrstuhl für Makromolekulare ChemieLichtenbergstraße 4Department of ChemistryTechnische Universität München 85747 Garching bei München Germany
- Catalysis Research CenterTechnische Universität München Ernst‐Otto‐Fischer‐Straße 1 85748 Garching bei München Germany
| | - Stephan A. Sieber
- WACKER‐Lehrstuhl für Makromolekulare ChemieLichtenbergstraße 4Department of ChemistryTechnische Universität München 85747 Garching bei München Germany
- Catalysis Research CenterTechnische Universität München Ernst‐Otto‐Fischer‐Straße 1 85748 Garching bei München Germany
- Chair of Organic Chemistry IITechnische Universität München
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Crystalline Structures and Structural Transitions of Copolyamides Derived from 1,4-Diaminobutane and Different Ratios of Glutaric and Azelaic Acids. Polymers (Basel) 2019; 11:polym11040572. [PMID: 30960556 PMCID: PMC6523342 DOI: 10.3390/polym11040572] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2019] [Revised: 03/16/2019] [Accepted: 03/18/2019] [Indexed: 11/16/2022] Open
Abstract
Copolyamides derived from even 1,4-butanediamine and different mixtures of odd dicarboxylic acids with a great difference in the number of methylene groups (i.e., glutaric and azelaic acids with 3 and 7 groups, respectively) have been synthesized, characterized and structurally studied. Calorimetric analyses revealed a complex behavior with multiple melting peaks associated to lamellar reordering and the presence of defective crystals. Equilibrium melting temperatures were evaluated and showed a eutectic behavior with composition. Copolymers were able to crystallize even for samples with comonomer percentages close to 50%. Negative and ringed spherulites from the melt state and small lath-like lamellar crystals from dilute solution crystallizations were attained. Furthermore, calorimetric data pointed out the exclusion of the less abundant monomer from the lattice of the predominant structure. All samples at room temperature showed a similar crystalline structure (form I) defined by two predominant reflections at spacings close to 0.430 and 0.380 nm, which has been related for even-odd nylons with a two-hydrogen bonded structure. Real time synchrotron experiments showed that melt crystallized samples have two polymorphic transitions on heating, which were practically reversible and consequently were also detected during cooling from the melt state. Interestingly, a different behavior was detected among solution crystallized samples and specifically the transition to the intermediate structure (form II) was not detected during heating for samples enriched on the azelate component or more precisely when they were exclusively crystallized in the form I.
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Long-Term Stability of Two Thermoplastic Polymers Modified with Silver Nanoparticles. NANOMATERIALS 2019; 9:nano9010061. [PMID: 30621151 PMCID: PMC6359626 DOI: 10.3390/nano9010061] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 12/12/2018] [Revised: 12/22/2018] [Accepted: 12/28/2018] [Indexed: 12/17/2022]
Abstract
The aim of this study was to investigate the mechanical properties of polymeric composites prepared via extrusion and injection moulding. Four stable thermoplastic polymers were used as composites matrices (two kinds of polymethyl methacrylate and two kinds of co-polymer acrylonitrile-butadiene-styrene). Silver nanoparticles AgNPs were used as a modifying phase. Mechanical properties of testes materials were determined during the uniaxial stretching. Surface properties such as roughness and contact angle were also evaluated. The materials’ stability was assessed using scanning electron microscopy and non-destructive ultrasonic testing. All measurements were carried out at time intervals, determining both the initial parameters and after 6 and 12 months of incubation in deionized water. The obtained results proved that neither the preparation technology nor the amount of the modifier adversely affect the mechanical properties of the tested composites. The incorporated modifier does not change the surface properties significantly. The studies conducted after the materials’ incubation in water indicate their stability.
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He W, Tao Y, Wang X. Functional Polyamides: A Sustainable Access via Lysine Cyclization and Organocatalytic Ring-Opening Polymerization. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b01790] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/16/2022]
Affiliation(s)
- Wenjing He
- Key Laboratory of Polymer Ecomaterials and, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Renmin Street 5625, Changchun 130022, P. R. China
- University of
Science and Technology of China, Hefei 230026, P. R. China
| | - Youhua Tao
- Key Laboratory of Polymer Ecomaterials and, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Renmin Street 5625, Changchun 130022, P. R. China
- University of
Science and Technology of China, Hefei 230026, P. R. China
| | - Xianhong Wang
- Key Laboratory of Polymer Ecomaterials and, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Renmin Street 5625, Changchun 130022, P. R. China
- University of
Science and Technology of China, Hefei 230026, P. R. China
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Chauveau C, Vanbiervliet E, Fouquay S, Michaud G, Simon F, Carpentier JF, Guillaume SM. Azlactone Telechelic Polyolefins as Precursors to Polyamides: A Combination of Metathesis Polymerization and Polyaddition Reactions. Macromolecules 2018. [DOI: 10.1021/acs.macromol.8b01628] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Cyril Chauveau
- CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, Univ Rennes, F-35000 Rennes, France
| | - Elise Vanbiervliet
- CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, Univ Rennes, F-35000 Rennes, France
| | - Stéphane Fouquay
- BOSTIK
S.A., 253, Avenue du Président Wilson, F-93211 La Plaine Saint-Denis, France
| | - Guillaume Michaud
- BOSTIK, ZAC du Bois
de Plaisance, 101, Rue du Champ Cailloux, F-60280 Venette, France
| | - Frédéric Simon
- BOSTIK, ZAC du Bois
de Plaisance, 101, Rue du Champ Cailloux, F-60280 Venette, France
| | - Jean-François Carpentier
- CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, Univ Rennes, F-35000 Rennes, France
| | - Sophie M. Guillaume
- CNRS, ISCR (Institut des Sciences Chimiques de Rennes), UMR 6226, Univ Rennes, F-35000 Rennes, France
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Rezania J, Hayatipour M, Shockravi A, Ehsani M, Vatanpour V. Synthesis and characterization of soluble aromatic polyamides containing double sulfide bond and thiazole ring. Polym Bull (Berl) 2018. [DOI: 10.1007/s00289-018-2441-8] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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47
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Zou G, Wang P, Feng W, Ren Z, Ji J. Poly(decamethylene terephthalamide) copolymerized with long-chain alkyl dodecanedioic acid: Toward bio-based polymer and improved performances. J Appl Polym Sci 2018. [DOI: 10.1002/app.46531] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/26/2023]
Affiliation(s)
- Guangji Zou
- National Engineering Research Center of Engineering Plastics; Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, 29 Zhongguancun East Road; Haidian District, Beijing 100190 People's Republic of China
- University of Chinese Academy of Sciences, 19 Yuquan Road; Shijingshan District, Beijing 100049 People's Republic of China
| | - Pingli Wang
- National Engineering Research Center of Engineering Plastics; Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, 29 Zhongguancun East Road; Haidian District, Beijing 100190 People's Republic of China
| | - Wutong Feng
- National Engineering Research Center of Engineering Plastics; Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, 29 Zhongguancun East Road; Haidian District, Beijing 100190 People's Republic of China
- University of Chinese Academy of Sciences, 19 Yuquan Road; Shijingshan District, Beijing 100049 People's Republic of China
| | - Zhonglai Ren
- National Engineering Research Center of Engineering Plastics; Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, 29 Zhongguancun East Road; Haidian District, Beijing 100190 People's Republic of China
| | - Junhui Ji
- National Engineering Research Center of Engineering Plastics; Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, 29 Zhongguancun East Road; Haidian District, Beijing 100190 People's Republic of China
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Winnacker M, Sag J. Sustainable terpene-based polyamides via anionic polymerization of a pinene-derived lactam. Chem Commun (Camb) 2018; 54:841-844. [DOI: 10.1039/c7cc08266e] [Citation(s) in RCA: 39] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/01/2023]
Abstract
A sustainable lactam, which is derived from the renewable terpene β-pinene, is converted to polyamides with prosperous thermal properties via a convenient anionic ring-opening polymerization (ROP).
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Affiliation(s)
- Malte Winnacker
- WACKER-Chair of Macromolecular Chemistry, Lichtenbergstraße 4, Technische Universität München
- 85747 Garching bei München
- Germany
- Catalysis Research Center, Ernst-Otto-Fischer-Straße 1, Technische Universität München
- 85748 Garching
| | - Jacob Sag
- WACKER-Chair of Macromolecular Chemistry, Lichtenbergstraße 4, Technische Universität München
- 85747 Garching bei München
- Germany
- Catalysis Research Center, Ernst-Otto-Fischer-Straße 1, Technische Universität München
- 85748 Garching
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