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Maiti S, Maji B, Yadav H. Progress on green crosslinking of polysaccharide hydrogels for drug delivery and tissue engineering applications. Carbohydr Polym 2024; 326:121584. [PMID: 38142088 DOI: 10.1016/j.carbpol.2023.121584] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Revised: 11/06/2023] [Accepted: 11/10/2023] [Indexed: 12/25/2023]
Abstract
Natural polysaccharides are being studied for their biocompatibility, biodegradability, low toxicity, and low cost in the fabrication of various hydrogel devices. However, due to their insufficient physicochemical and mechanical qualities, polysaccharide hydrogels alone are not acceptable for biological applications. Various synthetic crosslinkers have been tested to overcome the drawbacks of standalone polysaccharide hydrogels; however, the presence of toxic residual crosslinkers, the generation of toxic by-products following biodegradation, and the requirement of toxic organic solvents for processing pose challenges in achieving the desired non-toxic biomaterials. Natural crosslinkers such as citric acid, tannic acid, vanillin, gallic acid, ferulic acid, proanthocyanidins, phytic acid, squaric acid, and epigallocatechin have been used to generate polysaccharide-based hydrogels in recent years. Various polysaccharides, including cellulose, alginate, pectin, hyaluronic acid, and chitosan, have been hydrogelized and investigated for their potential in drug delivery and tissue engineering applications using natural crosslinkers. We attempted to provide an overview of the synthesis of polysaccharide-based hydrogel systems (films, complex nanoparticles, microspheres, and porous scaffolds) based on green crosslinkers, as well as a description of the mechanism of crosslinking and properties with a special emphasis on drug delivery, and tissue engineering applications.
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Affiliation(s)
- Sabyasachi Maiti
- Department of Pharmacy, Indira Gandhi National Tribal University, Amarkantak, Madhya Pradesh-484887, India.
| | - Biswajit Maji
- Department of Chemistry, Indira Gandhi National Tribal University, Amarkantak, Madhya Pradesh 484887, India
| | - Harsh Yadav
- Department of Pharmacy, Indira Gandhi National Tribal University, Amarkantak, Madhya Pradesh-484887, India
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Berglund L, Squinca P, Baş Y, Zattarin E, Aili D, Rakar J, Junker J, Starkenberg A, Diamanti M, Sivlér P, Skog M, Oksman K. Self-Assembly of Nanocellulose Hydrogels Mimicking Bacterial Cellulose for Wound Dressing Applications. Biomacromolecules 2023; 24:2264-2277. [PMID: 37097826 PMCID: PMC10170512 DOI: 10.1021/acs.biomac.3c00152] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/26/2023]
Abstract
The self-assembly of nanocellulose in the form of cellulose nanofibers (CNFs) can be accomplished via hydrogen-bonding assistance into completely bio-based hydrogels. This study aimed to use the intrinsic properties of CNFs, such as their ability to form strong networks and high absorption capacity and exploit them in the sustainable development of effective wound dressing materials. First, TEMPO-oxidized CNFs were separated directly from wood (W-CNFs) and compared with CNFs separated from wood pulp (P-CNFs). Second, two approaches were evaluated for hydrogel self-assembly from W-CNFs, where water was removed from the suspensions via evaporation through suspension casting (SC) or vacuum-assisted filtration (VF). Third, the W-CNF-VF hydrogel was compared to commercial bacterial cellulose (BC). The study demonstrates that the self-assembly via VF of nanocellulose hydrogels from wood was the most promising material as wound dressing and displayed comparable properties to that of BC and strength to that of soft tissue.
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Affiliation(s)
- Linn Berglund
- Department of Engineering Sciences and Mathematics, Luleå University of Technology, SE 97187 Luleå, Sweden
| | - Paula Squinca
- Department of Engineering Sciences and Mathematics, Luleå University of Technology, SE 97187 Luleå, Sweden
- Embrapa Instrumentation, Rua XV de Novembro 1452, 13561-206 São Carlos, São Paulo, Brazil
| | - Yağmur Baş
- Department of Engineering Sciences and Mathematics, Luleå University of Technology, SE 97187 Luleå, Sweden
| | - Elisa Zattarin
- Department of Physics, Chemistry and Biology (IFM), Linköping University, Linköping, SE-581 83 Linköping, Sweden
| | - Daniel Aili
- Department of Physics, Chemistry and Biology (IFM), Linköping University, Linköping, SE-581 83 Linköping, Sweden
| | - Jonathan Rakar
- Center for Disaster Medicine and Traumatology, Department of Biomedical and Clinical Sciences, Linköping University, SE-581 85 Linköping, Sweden
| | - Johan Junker
- Center for Disaster Medicine and Traumatology, Department of Biomedical and Clinical Sciences, Linköping University, SE-581 85 Linköping, Sweden
| | - Annika Starkenberg
- Center for Disaster Medicine and Traumatology, Department of Biomedical and Clinical Sciences, Linköping University, SE-581 85 Linköping, Sweden
| | - Mattia Diamanti
- Department of Engineering Sciences and Mathematics, Luleå University of Technology, SE 97187 Luleå, Sweden
| | | | | | - Kristiina Oksman
- Department of Engineering Sciences and Mathematics, Luleå University of Technology, SE 97187 Luleå, Sweden
- Mechanical & Industrial Engineering, University of Toronto, 5 King's College Road, ON M5S 3G8 Toronto, Canada
- Wallenberg Wood Science Center (WWSC), Luleå University of Technology, SE 97187 Luleå, Sweden
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Halahlah A, Piironen V, Mikkonen KS, Ho TM. Polysaccharides as wall materials in spray-dried microencapsulation of bioactive compounds: Physicochemical properties and characterization. Crit Rev Food Sci Nutr 2022; 63:6983-7015. [PMID: 35213281 DOI: 10.1080/10408398.2022.2038080] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
Abstract
Natural bioactive compounds (BCs) are types of chemicals found in plants and certain foods that promote good health, however they are sensitive to processing and environmental conditions. Microencapsulation by spray drying is a widely used and cost-effective approach to create a coating layer to surround and protect BCs and control their release, enabling the production of high functional products/ingredients with extended shelf life. In this process, wall materials determine protection efficiency, and physical properties, bioavailability, and storage stability of microencapsulated products. Therefore, an understanding of physicochemical properties of wall materials is essential for the successful and effective spray-dried microencapsulation process. Typically, polysaccharide-based wall materials are generated from more sustainable sources and have a wider range of physicochemical properties and applications compared to their protein-based counterparts. In this review, we highlight the essential physicochemical properties of polysaccharide-based wall materials for spray-dried microencapsulation of BCs including solubility, thermal stability, and emulsifying properties, rheological and film forming properties. We provide further insight into possibilities for the chemical structure modification of native wall materials and their controlled release behaviors. Finally, we summarize the most recent studies involving polysaccharide biopolymers as wall materials and/or emulsifiers in spray-dried microencapsulation of BCs.
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Affiliation(s)
| | - Vieno Piironen
- Department of Food and Nutrition, University of Helsinki, Finland
| | - Kirsi S Mikkonen
- Department of Food and Nutrition, University of Helsinki, Finland
- Helsinki Institute of Sustainability Science (HELSUS), University of Helsinki, Finland
| | - Thao M Ho
- Department of Food and Nutrition, University of Helsinki, Finland
- Helsinki Institute of Sustainability Science (HELSUS), University of Helsinki, Finland
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Xu R, Zhao X, Ma S, Ma Z, Wang R, Cai M, Zhou F. Hydrogen bonding induced enhancement for constructing anisotropic sugarcane composite hydrogels. J Appl Polym Sci 2021. [DOI: 10.1002/app.51374] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Rongnian Xu
- State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences Lanzhou China
| | - Xiaoduo Zhao
- State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences Lanzhou China
| | - Shuanhong Ma
- State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences Lanzhou China
| | - Zhengfeng Ma
- State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences Lanzhou China
- High‐end Equipment Lubrication Protection and Surface Engineering Technology and Materials Yantai Zhongke Research Institute of Advanced Materials and Green Chemical Engineering Yantai China
| | - Rui Wang
- State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences Lanzhou China
| | - Meirong Cai
- State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences Lanzhou China
| | - Feng Zhou
- State Key Laboratory of Solid Lubrication Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences Lanzhou China
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Mithra K, Jena SS. Surfactant head group and concentration influence on structure and dynamics of gellan gum hydrogels: Crossover from stretched to compressed exponential. JOURNAL OF POLYMER SCIENCE 2021. [DOI: 10.1002/pol.20210326] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Affiliation(s)
- K Mithra
- Department of Physics and Astronomy National Institute of Technology Rourkela Odisha India
| | - Sidhartha S Jena
- Department of Physics and Astronomy National Institute of Technology Rourkela Odisha India
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Eivazzadeh-Keihan R, Khalili F, Aliabadi HAM, Maleki A, Madanchi H, Ziabari EZ, Bani MS. Alginate hydrogel-polyvinyl alcohol/silk fibroin/magnesium hydroxide nanorods: A novel scaffold with biological and antibacterial activity and improved mechanical properties. Int J Biol Macromol 2020; 162:1959-1971. [DOI: 10.1016/j.ijbiomac.2020.08.090] [Citation(s) in RCA: 33] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2020] [Revised: 08/07/2020] [Accepted: 08/08/2020] [Indexed: 12/21/2022]
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Kim B, Cho HE, Moon SH, Ahn HJ, Bae S, Cho HD, An S. Transdermal delivery systems in cosmetics. BIOMEDICAL DERMATOLOGY 2020. [DOI: 10.1186/s41702-020-0058-7] [Citation(s) in RCA: 24] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
AbstractTransdermal delivery systems have been intensively studied over the past 2 decades, with the focus on overcoming the skin barrier for more effective application of pharmaceutical and cosmetic products. Although the cosmeceutical industry has made a substantial progress in the development and incorporation of new and effective actives in their products, the barrier function of the skin remains a limiting factor in the penetration and absorption of these actives. Enhancement via modification of the stratum corneum by hydration, acting of chemical enhancers on the structure of stratum corneum lipids, and partitioning and solubility effects are described. This review summarizes the advances in the development and mechanisms of action of chemical components that act as permeation enhancers, as well as the advances in appropriate vehicles, such as gels, emulsions, and vesicular delivery systems, that can be used for effective transdermal delivery.
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Khanum H, Ullah K, Murtaza G, Khan SA. Fabrication and in vitro characterization of HPMC-g-poly(AMPS) hydrogels loaded with loxoprofen sodium. Int J Biol Macromol 2018; 120:1624-1631. [PMID: 30287359 DOI: 10.1016/j.ijbiomac.2018.09.184] [Citation(s) in RCA: 43] [Impact Index Per Article: 7.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/26/2018] [Revised: 08/30/2018] [Accepted: 09/28/2018] [Indexed: 11/30/2022]
Abstract
The aim of this study was to prepare hydroxypropyl-methyl cellulose (HPMC)-K15 based hydrogels via free radical polymerization using 2‑acrylamido-2‑methyl propane sulphonic acid (AMPS) as a monomer and N,N'-methylene bisacrylamide (MBAAm) as a crosslinker. Loxoprofen sodium was chosen as a model drug and successfully loaded in hydrogel discs. Sol-gel, porosity, loading efficiency, and the in vitro drug release analysis were carried out to evaluate its drug delivery potential. HMPC-g-poly(AMPS) hydrogels were characterized by using Fourier transform infrared spectroscopy (FTIR), differential scanning calorimetry (DSC), and scanning electron microscopy (SEM) approaches. Maximum swelling and drug release were observed at pH 7.4. Kinetic modelling suggested that drug release followed first-order kinetics with the non-Fickian mechanism. FTIR and DSC confirmed the formation of new hydrogels. SEM micrographs confirmed uneven, rough, and partially porous type of surface. These results suggested that HMPC-g-poly(AMPS) hydrogels can be a prospective pH-responsive carrier for delivery of water-soluble drugs, such as loxoprofen sodium.
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Affiliation(s)
- Hira Khanum
- Department of Pharmacy, COMSATS University Islamabad, Abbottabad Campus, 22060, Pakistan
| | - Kaleem Ullah
- Department of Pharmacy, COMSATS University Islamabad, Abbottabad Campus, 22060, Pakistan
| | - Ghulam Murtaza
- Department of Pharmacy, COMSATS University Islamabad, Lahore Campus, 60000, Pakistan.
| | - Shujaat Ali Khan
- Department of Pharmacy, COMSATS University Islamabad, Abbottabad Campus, 22060, Pakistan.
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Sattari M, Fathi M, Daei M, Erfan-Niya H, Barar J, Entezami AA. Thermoresponsive graphene oxide - starch micro/nanohydrogel composite as biocompatible drug delivery system. BIOIMPACTS : BI 2017; 7:167-175. [PMID: 29159144 PMCID: PMC5684508 DOI: 10.15171/bi.2017.20] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/17/2017] [Revised: 07/09/2017] [Accepted: 07/23/2017] [Indexed: 12/20/2022]
Abstract
Introduction: Stimuli-responsive hydrogels, which indicate a significant response to the environmental change (e.g., pH, temperature, light, …), have potential applications for tissue engineering, drug delivery systems, cell therapy, artificial muscles, biosensors, etc. Among the temperature-responsive materials, poly (N-isopropylacrylamide) (PNIPAAm) based hydrogels have been widely developed and their properties can be easily tailored by manipulating the properties of the hydrogel and the composite material. Graphene oxide (GO), as a multifunctional and biocompatible nanosheet, can efficiently improve the mechanical strength and response rate of PNIPAAm-based hydrogels. Here, hydrogel composites (HCs) of PNIPAAm with GO was developed using the modified starch as a biodegradable cross-linker. Methods: Micro/nanohydrogel composites were synthesized by free radical polymerization of NIPAAm in the suspension of different feed ratio of GO using maleate-modified starch (St-MA) as cross-linker and Tetrakis (hydroxymethyl) phosphonium chloride (THPC) as a strong oxygen scavenger. The HCs were characterized by FT-IR, DSC, TGA, SEM, and DLS. Also, the phase transition, swelling/deswelling behavior, hemocompatibility and biocompatibility of the synthesized HCs were investigated. Results: The thermal stability, phase transition temperature and internal network crosslinking of HCs increases with increasing of the GO feed ratio. Also, the swelling/deswelling, hemolysis, and MTT assays studies confirmed that the HCs are a fast response, hemocompatible and biocompatible materials. Conclusion: The employed facile approach for the synthesis of HCs yields an intelligent material with great potential for biomedical applications.
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Affiliation(s)
- Mina Sattari
- Research Center for Pharmaceutical Nanotechnology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Marziyeh Fathi
- Research Center for Pharmaceutical Nanotechnology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Mansour Daei
- Department of Chemical and Petroleum Engineering, University of Tabriz, Tabriz, Iran
| | - Hamid Erfan-Niya
- Department of Chemical and Petroleum Engineering, University of Tabriz, Tabriz, Iran
| | - Jaleh Barar
- Research Center for Pharmaceutical Nanotechnology, Faculty of Pharmacy, Tabriz University of Medical Sciences, Tabriz, Iran
| | - Ali Akbar Entezami
- Laboratory of Polymer Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran
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Barkat K, Ahmad M, Usman Minhas M, Khalid I, Nasir B. Development and characterization of pH-responsive polyethylene glycol-co-poly(methacrylic acid) polymeric network system for colon target delivery of oxaliplatin: Its acute oral toxicity study. ADVANCES IN POLYMER TECHNOLOGY 2017. [DOI: 10.1002/adv.21840] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Kashif Barkat
- Faculty of Pharmacy and Alternative Medicine; The Islamia University of Bahawalpur; Bahawalpur Punjab Pakistan
| | - Mahmood Ahmad
- Faculty of Pharmacy and Alternative Medicine; The Islamia University of Bahawalpur; Bahawalpur Punjab Pakistan
| | - Muhammad Usman Minhas
- Faculty of Pharmacy and Alternative Medicine; The Islamia University of Bahawalpur; Bahawalpur Punjab Pakistan
| | - Ikrima Khalid
- Faculty of Pharmacy and Alternative Medicine; The Islamia University of Bahawalpur; Bahawalpur Punjab Pakistan
| | - Bushra Nasir
- Faculty of Pharmacy; Bahauddin Zakariya University; Multan Punjab Pakistan
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Cassano R, Trombino S. Trehalose-based hydrogel potentially useful for the skin burn treatment. J Appl Polym Sci 2017. [DOI: 10.1002/app.44755] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/07/2022]
Affiliation(s)
- Roberta Cassano
- Department of Pharmacy; Health and Nutritional Sciences, University of Calabria; 87036 Arcavacata di Rende Cosenza Italy
| | - Sonia Trombino
- Department of Pharmacy; Health and Nutritional Sciences, University of Calabria; 87036 Arcavacata di Rende Cosenza Italy
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Tuncay Tanrıverdi S, Cheaburu-Yilmaz CN, Carbone S, Özer Ö. Preparation and in vitro evaluation of melatonin-loaded HA/PVA gel formulations. Pharm Dev Technol 2016; 23:815-825. [PMID: 27915492 DOI: 10.1080/10837450.2016.1268158] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Melatonin-loaded hyaluronic acid (HA) and poly(vinyl alcohol) (PVA) gels were prepared by using freeze-thaw technique and an emulsion method followed by freeze-thaw technique to produce a new synergistic system for topical application. Freeze-thaw hydrogels and emulgels were characterized by means of Fourier transform infrared spectroscopy, rheology and swelling tests. The porous structure of the hydrogels was shown by scanning electron microscopy observations and thermal properties were tested by differential scanning calorimetry measurements. Bioadhesion and in vitro release characterization of formulations were performed by texture profile analysis and dialysis bag method, respectively. The pore size of both formulations was ranging from 900 nm to 30 μm. Melatonin showed a good compatibility with the polymeric matrices as the pores were smaller for the drug-loaded systems. In vitro release studies showed that the release was improved by emulgel formulations. After 24 h, the release percentage was found to be 13.240% ± 1.094 and 15.192% ± 2.270 for hydrogel and emulgel, respectively. Emulgels had better bioadhesion properties than simple freeze-thaw samples. As a conclusion, regarding the in vitro characterization studies HA and PVA hydrogel and emulgel formulations and their lyophilized forms could be promising systems for topical application of melatonin.
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Affiliation(s)
- Sakine Tuncay Tanrıverdi
- a Department of Pharmaceutical Technology, Faculty of Pharmacy , Ege University , Bornova-İzmir , Turkey
| | - Catalina Natalia Cheaburu-Yilmaz
- a Department of Pharmaceutical Technology, Faculty of Pharmacy , Ege University , Bornova-İzmir , Turkey.,b Department of Physical Chemistry of Polymers , "Petru Poni" Institute of Macromolecular Chemistry , Iasi , Romania
| | - Sonia Carbone
- c Faculty of Pharmacy , University of Turin , Torino , Italy
| | - Özgen Özer
- a Department of Pharmaceutical Technology, Faculty of Pharmacy , Ege University , Bornova-İzmir , Turkey
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Chitosan: A Promising Substrate for Regenerative Medicine in Drug Formulation. SPRINGER SERIES ON POLYMER AND COMPOSITE MATERIALS 2016. [DOI: 10.1007/978-81-322-2511-9_10] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
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Singh D, Singh A, Singh R. Polyvinyl pyrrolidone/carrageenan blend hydrogels with nanosilver prepared by gamma radiation for use as an antimicrobial wound dressing. JOURNAL OF BIOMATERIALS SCIENCE-POLYMER EDITION 2015; 26:1269-85. [PMID: 26397966 DOI: 10.1080/09205063.2015.1087366] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
Abstract
Hydrogels were prepared using polyvinyl pyrrolidone (PVP) blended with carrageenan by gamma irradiation at different doses of 25 and 40 kGy. Gel fraction of hydrogels prepared using 10 and 15% PVP in combination with 0.25 and 0.5% carrageenan was evaluated. Based on gel fraction, 15% PVP in combination with 0.25% carrageenan and radiation dose of 25 kGy was selected for the preparation of hydrogels with nanosilver. Radiolytic synthesis of silver nanoparticles within the PVP hydrogel was carried out. The hydrogels with silver nanoparticles were assessed for antimicrobial effectiveness and physical properties of relevance to clinical performance. Fluid handling capacity (FHC) for PVP/carrageenan was 2.35 ± 0.39-6.63 ± 0.63 g/10 cm(2) in 2-24 h. No counts for Pseudomonas aeruginosa, Staphylococcus aureus, Escherichia coli, and Candida albicans were observed in the presence of hydrogels containing 100 ppm nanosilver after 3-6 h. The release of silver from hydrogels containing 100 ppm nanosilver was 20.42 ± 1.98 ppm/100 cm(2) in 24 h. Hydrogels containing 100 ppm nanosilver with efficient FHC demonstrated potential microbicidal activity (≥3 log10 decrease in CFU/ml) against wound pathogens, P. aeruginosa, S. aureus, E. coli, and C. albicans. PVP/carrageenan hydrogels containing silver nanoparticles can be used as wound dressings to control infection and facilitate the healing process for burns and other skin injuries.
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Affiliation(s)
- Durgeshwer Singh
- a Defence Laboratory , Defence Research and Development Organization , Jodhpur 342011 , India
| | - Antaryami Singh
- a Defence Laboratory , Defence Research and Development Organization , Jodhpur 342011 , India
| | - Rita Singh
- a Defence Laboratory , Defence Research and Development Organization , Jodhpur 342011 , India
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Saher O, Ghorab DM, Mursi NM. Preparation and in vitro/in vivo evaluation of antimicrobial ocular in situ gels containing a disappearing preservative for topical treatment of bacterial conjunctivitis. Pharm Dev Technol 2015; 21:600-10. [DOI: 10.3109/10837450.2015.1035728] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Affiliation(s)
- Osama Saher
- Department Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Cairo University, Cairo, Egypt
| | - Dalia M. Ghorab
- Department Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Cairo University, Cairo, Egypt
| | - Nadia M. Mursi
- Department Pharmaceutics and Industrial Pharmacy, Faculty of Pharmacy, Cairo University, Cairo, Egypt
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Parhi R, Suresh P, Patnaik S. Formulation optimization of PVA/HPMC cryogel of Diltiazem HCl using 3-level factorial design and evaluation for ex vivo permeation. JOURNAL OF PHARMACEUTICAL INVESTIGATION 2015. [DOI: 10.1007/s40005-015-0179-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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17
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Leawhiran N, Pavasant P, Soontornvipart K, Supaphol P. Gamma irradiation synthesis and characterization of AgNP/gelatin/PVA hydrogels for antibacterial wound dressings. J Appl Polym Sci 2014. [DOI: 10.1002/app.41138] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Nuchanan Leawhiran
- Faculty of Engineering; Chulalongkorn University; Pathum Wan Bangkok 10330 Thailand
| | - Prasit Pavasant
- Faculty of Dentistry; Chulalongkorn University; Pathum Wan Bangkok 10330 Thailand
| | | | - Pitt Supaphol
- The Petroleum and Petrochemical College; Chulalongkorn University; Pathum Wan Bangkok 10330 Thailand
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Development of simvastatin electrospun fibers: a novel approach for sustained drug delivery. JOURNAL OF PHARMACEUTICAL INVESTIGATION 2014. [DOI: 10.1007/s40005-014-0140-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Mahdavinia GR, Iravani S, Zoroufi S, Hosseinzadeh H. Magnetic and K+-cross-linked kappa-carrageenan nanocomposite beads and adsorption of crystal violet. IRANIAN POLYMER JOURNAL 2014. [DOI: 10.1007/s13726-014-0229-8] [Citation(s) in RCA: 43] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/07/2023]
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Dhingra S, Weisel RD, Li RK. Synthesis of aliphatic polyester hydrogel for cardiac tissue engineering. Methods Mol Biol 2014; 1181:51-59. [PMID: 25070326 DOI: 10.1007/978-1-4939-1047-2_5] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/03/2023]
Abstract
Despite clinical advances, ischemic heart disease continues to be a major cause of morbidity and mortality worldwide. Prolonged cardiac ischemia and loss of cardiomyocytes frequently result in progressive pathological remodeling of the myocardium. If the heart is unable to adapt, patients may succumb to terminal heart failure. Cardiac tissue regeneration combining biodegradable biomaterials and stem cells has emerged as a new approach to restore heart function. Biomaterials, including injectable hydrogels and spongy scaffolds, can facilitate stem cell engraftment and survival and prevent adverse ventricular remodeling. Promising early results with injectable, biodegradable hydrogels for cardiac repair have provided new opportunities for designing innovative therapies to treat injured hearts. Hydrogels can be made from natural or synthetic polymers and have a water content, flexibility, and other physiochemical characteristics similar to those of living tissue, which makes them excellent candidates for tissue repair. In addition, hydrogels can be used as a vehicle to deliver cytokines or cells to the heart and can be employed to encapsulate biological macromolecules or cells and release them into the surrounding tissues during degradation. Hydrogels undergo physicochemical modifications in response to changes in temperature or pH, depending upon their polymer composition, converting from a liquid to a gel. The gel form retains cytokine molecules, allows their prolonged, controlled release, and preserves their bioactivity for extended periods. Polyethylene glycol is a water-soluble, biocompatible polymer that has negligible immunogenicity and can produce efficient conjugation of hydrogels to growth factors. In this chapter, we provide insight into the composition, polymerization, and use of a temperature-sensitive, biodegradable, aliphatic polyester hydrogel that transforms to a gel at physiological temperatures and is a potential candidate for cardiac tissue regeneration.
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Affiliation(s)
- Sanjiv Dhingra
- Division of Cardiovascular Surgery, Toronto General Research Institute, University Health Network, Toronto, ON, Canada
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Abstract
A medication's pharmacokinetic properties can be as important as its efficacy in determining how successful a treatment is. Formulation plays a critical role in absorption, distribution, and elimination of a drug, which in turn can influence the clinical profile of a medication, including onset and duration of action, consistency of plasma levels, ability to cross the blood-brain barrier, and other factors. Advances in drug delivery technology mean that formulation is now an integral component in the development of a drug. Likewise, formulation is one of the factors that may influence selection of a medication to suit the needs of a particular patient. This article briefly reviews the technologies commonly applied in the development of psychotropic medications, with emphasis on the various oral modified-release formulations, and discusses how formulation can be used to optimize the efficacy and tolerability of psychotropic drugs.
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Ross AE, Tang MY, Gemeinhart RA. Effects of molecular weight and loading on matrix metalloproteinase-2 mediated release from poly(ethylene glycol) diacrylate hydrogels. AAPS JOURNAL 2012; 14:482-90. [PMID: 22535508 DOI: 10.1208/s12248-012-9356-3] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/17/2012] [Accepted: 03/28/2012] [Indexed: 01/05/2023]
Abstract
Herein, we report on continued efforts to understand an implantable poly(ethylene glycol) diacrylate (PEGDA) hydrogel drug delivery system that responds to extracellular enzymes, in particular matrix metalloproteinase-2 (MMP-2) to provide controlled drug delivery. By attaching peptide as pendant groups on the hydrogel backbone, drug release occurs at an accelerated rate in the presence of active protease. We investigated MMP-2 entry and optimized parameters of the drug delivery system. Mesh size for different PEGDA molecular weight macromers was measured with PEGDA 3,400 hydrogels having a mesh size smaller than the dimensions of MMP-2 and PEGDA 10,000 and PEGDA 20,000 hydrogels having mesh sizes larger than MMP-2. Purified MMP-2 increased release of peptide fragment compared to buffer at several loading concentrations. Cell-stimulated release was demonstrated using U-87 MG cells embedded in collagen. GM6001, an MMP inhibitor, diminished release and altered the identity of the released peptide fragment. The increase in ratio of release from PEGDA 10,000 and PEGDA 20,000 hydrogels compared to PEGDA 3,400 hydrogels suggests MMP-2 enters the hydrogel. PEGDA molecular weight of 10,000 and 15 % (w/V) were the optimal conditions for release and handling. The use of protease-triggered drug delivery has great advantage particularly with the control of protease penetration as a parameter for controlling rate of release.
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Affiliation(s)
- Amy E Ross
- Department of Bioengineering, University of Illinois, Chicago, 60607-7052, USA
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Larobina D, Greco F. Prediction of the effects of constitutive viscoelasticity on stress-diffusion coupling in gels. J Chem Phys 2012; 136:134904. [DOI: 10.1063/1.3699978] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022] Open
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Rapid Synthesis of Acrylamide onto Xanthan Gum Based Hydrogels under Microwave Radiations for Enhanced Thermal and Chemical Modifications. ACTA ACUST UNITED AC 2011. [DOI: 10.1177/204124791100200302] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
The main objective of this research work is to synthesize crosslinked hydrogel from xanthan gum and acrylamide under the influence of microwave radiations by graft polymerization technique in presence of potassium persulphate-N,N'-methylene-bis-acrylamide as initiator-crosslinker system. Different reaction parameters such as reaction time, pH, solvent and initiator concentration were optimized a function of percentage grafting. Monomer and cross-linker concentrations were optimized as a function of percentage swelling for getting the polymer with maximum water absorption capacity. The superabsorbent was characterized using different characterization techniques like, FTIR, TGA / DTA / TDG and X-ray diffraction. The candidate polymer was found to be thermally more stable than the xanthan gum.
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Singh V, Bushetti SS, Appala R, Shareef A, Imam SS, Singh M. Stimuli-sensitive hydrogels: a novel ophthalmic drug delivery system. Indian J Ophthalmol 2011; 58:477-81. [PMID: 20952830 PMCID: PMC2993976 DOI: 10.4103/0301-4738.71677] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Background: Stimuli-sensitive hydrogels are three-dimensional, hydrophilic, polymeric networks capable of imbibing large amounts of water or biological fluids on stimulation, such as pH, temperature and ionic change. Aim: To develop hydrogels that are sensitive to stimuli, i.e. pH, in the cul-de-sac of the eye for providing a prolonged effect and increased bioavailability with reduction in frequency of administration. Materials and Methods: Hydrogels were formulated by using timolol maleate as the model drug, polyacrylic acid as the gelling agents, hydroxyl ethyl cellulose as the viscolizer and sodium chloride as the isotonic agent. Stirring of ingredients in pH 4 phosphate buffer at high speed was carried out. The dynamic dialysis technique was used for drug release studies. In vivo study for reduction in intraocular pressure was carried out by using albino rabbits. Statistical Analysis: Drug release studies data were used for statistical analysis in first-order plots, Higuchi plots and Peppas exponential plots. Student t-test was performed for in vivo study. Results: Viscosity of the hydrogel increases from 3.84 cps to 9.54 cps due to change in pH 4 to pH 7.4. The slope value of the Peppas equation was found to be 0.3081, 0.3743 and 0.2964. Up to 80% of drug was released in an 8 h drug release study. Sterile hydrogels with no ocular irritation were obtained. Conclusions: Hydrogels show increase in viscosity due to change in pH. Hydrogels were therapeutically effacious, stable, non-irritant and showed Fickian diffusion. In vivo results clearly show a prolonged reduction in intraocular pressure, which was helpful for reduction in the frequency of administration.
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Affiliation(s)
- Vinod Singh
- Department of Pharmaceutics & Pharmacology, SBS PG Institute of Biomedical Sciences and Research, Dehradun, Uttarakhand, India.
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Zhang B, Cui Y, Yin G, Li X, You Y. Synthesis and Swelling Properties of Hydrolyzed Cottonseed Protein Composite Superabsorbent Hydrogel. INT J POLYM MATER PO 2010. [DOI: 10.1080/00914031003760709] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Pacios IE, Piérola IF. Discrimination of the roles of crosslinking density and morphology in the swelling behavior of crosslinked polymers: Poly(N-vinylimidazole) hydrogels. J Appl Polym Sci 2009. [DOI: 10.1002/app.29307] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
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De Giglio E, Cometa S, Satriano C, Sabbatini L, Zambonin PG. Electrosynthesis of hydrogel films on metal substrates for the development of coatings with tunable drug delivery performances. J Biomed Mater Res A 2009; 88:1048-57. [PMID: 18404708 DOI: 10.1002/jbm.a.31908] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022]
Abstract
Novel polyacrylates-based hydrogel thin films were prepared by electrochemical polymerization, a new method to obtain hydrogels directly onto metal substrates. 2-Hydroxy-ethyl-methacrylate (HEMA), a macromer poly (ethylene-glycol diacrylate) (PEGDA) and PEGDA copolymerized with acrylic acid (AA) were used to obtain hydrogels. The electrosynthesized coatings were characterized by X-ray photoelectron spectroscopy, to assess their surface chemical composition, and by water content determination measurements, to characterize the swelling behavior. In particular, quartz crystal microbalance with dissipation monitoring was used to evaluate the pH-dependency of the swelling for AA-containing hydrogels. Moreover, a model protein (bovine serum albumin) and a model drug (caffeine) were entrapped within the hydrogel coatings during electrosynthesis, to examine the release performances and mechanisms of the electrosynthesized hydrogels. It was observed that all the examined polymers showed significant release properties and, in particular, AA-containing hydrogel films confirmed a strong pH-dependence as expected. These coatings seem to be promising in orthopedic field for in situ drug delivery applications.
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Affiliation(s)
- E De Giglio
- Department of Chemistry, University of Bari, Via E. Orabona 4 I-70126 Bari, Italy.
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Sutar PB, Mishra RK, Pal K, Banthia AK. Development of pH sensitive polyacrylamide grafted pectin hydrogel for controlled drug delivery system. JOURNAL OF MATERIALS SCIENCE. MATERIALS IN MEDICINE 2008; 19:2247-53. [PMID: 17619970 DOI: 10.1007/s10856-007-3162-y] [Citation(s) in RCA: 70] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2006] [Accepted: 08/21/2006] [Indexed: 05/16/2023]
Abstract
In the present study an attempt was made to graft polyacrylamide on pectin. The grafted polymer was characterized by FTIR spectroscopy, differential scanning calorimetry and X-ray diffraction. Rheological property of pectin solution was compared with the product solution. The grafted polymer was cross-linked with varying amount of glutaraldehyde. The swelling properties of the cross-linked product were also studied. The salicylic acid, an antipyretic drug, was incorporated in the cross-linked gel as a model drug and the drug release studies were done in a modified Franz's diffusion cell. The effect of cross-linking density on the release property of salicylic acid was studied through the cross-linked product. The product showed better film forming property and gelling property than pectin. The comparative rheological properties of pectin and grafted copolymer indicated change in the property of the product. FTIR studies indicated incorporation of amide group. Differential scanning calorimetry and XRD suggested formation of a new polymer. Swelling study indicated pH dependent swelling of the cross-linked hydrogel. Salicylic acid release indicated pH dependent release from the hydrogel.
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Affiliation(s)
- Prashant B Sutar
- Materials Science Centre, Indian Institute of Technology, Kharagpur, 721302, India
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Valencia J, Piérola IF. Interpretation of the polyelectrolyte and antipolyelectrolyte effects of poly(N-vinylimidazole-co-sodium styrenesulfonate) hydrogels. ACTA ACUST UNITED AC 2007. [DOI: 10.1002/polb.21194] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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Nolan CM, Reyes CD, Debord JD, García AJ, Lyon LA. Phase Transition Behavior, Protein Adsorption, and Cell Adhesion Resistance of Poly(ethylene glycol) Cross-Linked Microgel Particles. Biomacromolecules 2005; 6:2032-9. [PMID: 16004442 DOI: 10.1021/bm0500087] [Citation(s) in RCA: 150] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
Thermoresponsive poly(N-isopropylacrylamide) (pNIPAm) microgel particles cross-linked with various concentrations of PEG diacrylates of 3 different PEG chain lengths were synthesized via free-radical precipitation polymerization in order to investigate the phase transition and protein adsorption behavior as the hydrophilicity of the network is increased. Photon correlation spectroscopy (PCS) reveals that, as the concentration of PEG cross-linker incorporated into the particles is increased, an increase in the temperature and breadth of the phase transition occurs. Qualitative differences in particle density using isopycnic centrifugation confirm that higher PEG concentrations result in denser networks. The efficient incorporation of PEG cross-linker was confirmed with (1)H NMR, and variable temperature NMR studies suggest that, in the deswollen state, the longer PEG cross-links protrude from the dense globular network. This behavior apparently manifests itself as a decrease in nonspecific protein adsorption with increasing PEG length and content. Furthermore, when electrostatically attached to a glass surface, the particles containing the longer chain lengths exhibited enhanced nonfouling behavior and were resistant to cell adhesion in serum-containing media. The excellent performance of these particulate films and the simplicity with which they are assembled suggests that they may be applicable in a wide range of applications where nonfouling coatings are required.
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Affiliation(s)
- Christine M Nolan
- School of Chemistry and Biochemistry, Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta, Georgia 30332, USA
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Acosta N, Aranaz I, Peniche C, Heras A. Tramadol Release from a Delivery System Based on Alginate-Chitosan Microcapsules. Macromol Biosci 2003. [DOI: 10.1002/mabi.200300009] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
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Bell CL, Peppas NA. Biomedical membranes from hydrogels and interpolymer complexes. BIOPOLYMERS II 1995. [DOI: 10.1007/3540587888_15] [Citation(s) in RCA: 137] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Scranton AB, Rangarajan B, Klier J. Biomedical applications of polyelectrolytes. BIOPOLYMERS II 1995. [DOI: 10.1007/3540587888_13] [Citation(s) in RCA: 59] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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