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Zhang Y, Song Q, Tian Y, Zhao G, Zhou Y. Insights into biomacromolecule-based alcogels: A review on their synthesis, characteristics and applications. Food Hydrocoll 2022. [DOI: 10.1016/j.foodhyd.2022.107574] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
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2
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Chemical Composition and Rheological Properties of Seed Mucilages of Various Yellow- and Brown-Seeded Flax ( Linum usitatissimum L.) Cultivars. Polymers (Basel) 2022; 14:polym14102040. [PMID: 35631922 PMCID: PMC9145172 DOI: 10.3390/polym14102040] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2022] [Revised: 05/04/2022] [Accepted: 05/09/2022] [Indexed: 02/01/2023] Open
Abstract
When seeds sown in the soil become wet, their hulls secrete viscous matter that can retain water and thus support germination. Flaxseed mucilage (FSM) is an example of such a material and is attractive for food, cosmetic, and pharmaceutical applications due to its suitable rheological properties. FSM consists mainly of two polysaccharides, namely, arabinoxylan and rhamnogalacturonan I, and it also contains some proteins, minerals, and phenolic compounds. The genotype and the year of the flax harvest can significantly affect the composition and functional properties of FSM. In this work, FSM samples were isolated from flax seeds of different cultivars and harvest years, and their structural and rheological properties were compared using statistical methods. The samples showed significant variability in composition and rheological properties depending on the cultivar and storage time. It was found that the ratio of two polysaccharide fractions and the contribution of less-prevalent proteins are important factors determining the rheological parameters of FSM, characterizing the shear-thinning, thixotropic, and dynamic viscoelastic behavior of this material in aqueous solutions. The yield strength and the hysteresis loop were found to be associated with the contribution of the pectin fraction, which included homogalacturonan and rhamnogalacturonan I. In contrast, the shear-thinning and especially the dynamic viscoelastic properties depended on the arabinoxylan content. Proteins also affected the viscoelastic properties and maintained the elastic component of FSM in the solution. The above structural and rheological characteristics should be taken into account when considering effective applications for this material.
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3
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Lu J, Fang Q, Ma N, Yang W, Zhang L, Huang T. Gelation behaviour of fish skin gelatin in the presence of methanol‐water and ethanol‐water solvent system. Int J Food Sci Technol 2021. [DOI: 10.1111/ijfs.15522] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Jinpei Lu
- College of Food and Pharmaceutical Sciences Ningbo University Ningbo China
| | - Qi Fang
- College of Food and Pharmaceutical Sciences Ningbo University Ningbo China
| | - Nao Ma
- College of Food and Pharmaceutical Sciences Ningbo University Ningbo China
| | - Wenge Yang
- College of Food and Pharmaceutical Sciences Ningbo University Ningbo China
- Key Laboratory of Animal Protein Food Deep Processing Technology of Zhejiang Province Ningbo University Ningbo China
| | - Lingyue Zhang
- College of Food and Pharmaceutical Sciences Ningbo University Ningbo China
- School of Life Science and Material Chemistry Bioengineering, Ningbo University Ningbo China
| | - Tao Huang
- College of Food and Pharmaceutical Sciences Ningbo University Ningbo China
- Key Laboratory of Animal Protein Food Deep Processing Technology of Zhejiang Province Ningbo University Ningbo China
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Synytsya A, Poučková P, Zadinová M, Troshchynska Y, Štětina J, Synytsya A, Saloň I, Král V. Hydrogels based on low-methoxyl amidated citrus pectin and flaxseed gum formulated with tripeptide glycyl-l-histidyl-l-lysine improve the healing of experimental cutting wounds in rats. Int J Biol Macromol 2020; 165:3156-3168. [PMID: 33031852 DOI: 10.1016/j.ijbiomac.2020.09.251] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2019] [Revised: 09/06/2020] [Accepted: 09/29/2020] [Indexed: 12/19/2022]
Abstract
Hydrogels based on natural and modified polysaccharides represent growing group of suitable matrices for the construction of effective wound healing materials. Bioactive tripeptide glycyl-l-histidyl-l-lysine and amino acid α-l-arginine are known to accelerate wound healing and skin repair. In this study, hydrogels based on low-methoxyl amidated citrus pectin or flaxseed gum were prepared and used for the transport of these healing agents to the experimental cutting wounds affected by extensive skin damage. Fourier-transform infrared spectroscopy, rheology, differential scanning calorimetry, scanning electron microscopy, swelling and release tests confirmed that these hydrogels differed in structure and physical properties. The cationic tripeptide was found to bind to carboxylic groups in LMA pectin, and the C3OH hydroxyl and ring oxygen O5 are involved in this interaction. The pectin hydrogel showed high viscosity and strong elastic properties, while the flaxseed gum hydrogel was characterised as a viscoelastic system of much lower viscosity. The former hydrogel released the drugs very slowly, while the latter hydrogel demonstrated zero order releasing kinetics optimal for drug delivery. In the in vivo wound healing testing on rats, both polysaccharide hydrogels improved the healing process mediated by the mentioned biomolecules. The tripeptide applied in the hydrogels showed significantly higher healing degree and lower healing time than in the control animals without treatment and when it was applied in an aqueous solution. Despite the absence of a synergistic effect, the mixture of the tripeptide and α-l-arginine in the hydrogels was also quite effective in wound healing. According to histological analysis, complete healing was achieved only when using the tripeptide in the flaxseed gum hydrogel. These observations might have an important prospect in clinical application of polysaccharide hydrogels.
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Affiliation(s)
- Alla Synytsya
- Department of Analytical Chemistry, UCT Prague, Technická 5, 166 28 Prague 6, Czech Republic; BIOCEV, 1st Faculty of Medicine, Charles University, Průmyslová 595, 252 50 Vestec, Czech Republic.
| | - Pavla Poučková
- Institute of Biophysics and Informatics, 1st Faculty of Medicine, Charles University, Kateřinská 1660/32, 121 08 Prague 2, Czech Republic
| | - Marie Zadinová
- Institute of Biophysics and Informatics, 1st Faculty of Medicine, Charles University, Kateřinská 1660/32, 121 08 Prague 2, Czech Republic
| | - Yana Troshchynska
- Department of Dairy, Fat and Cosmetics, UCT Prague, Technická 5, 166 28 Prague 6, Czech Republic; Department of Carbohydrates and Cereals, UCT Prague, Technická 5, 166 28 Prague 6, Czech Republic
| | - Jiří Štětina
- Department of Dairy, Fat and Cosmetics, UCT Prague, Technická 5, 166 28 Prague 6, Czech Republic
| | - Andriy Synytsya
- Department of Carbohydrates and Cereals, UCT Prague, Technická 5, 166 28 Prague 6, Czech Republic
| | - Ivan Saloň
- Department of Chemical Engineering, UCT Prague, Technická 5, 166 28 Prague 6, Czech Republic
| | - Vladimír Král
- Department of Analytical Chemistry, UCT Prague, Technická 5, 166 28 Prague 6, Czech Republic; BIOCEV, 1st Faculty of Medicine, Charles University, Průmyslová 595, 252 50 Vestec, Czech Republic
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5
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Xu J, Zhou H, Li K, Ma J, Zhang W, Liu L, Sun Y, Zhang H, Li K. Multi-scale pectin/polyphenol beads for non-fouling fluorescence tracking on soft matter under water. Carbohydr Polym 2018; 199:186-192. [PMID: 30143119 DOI: 10.1016/j.carbpol.2018.07.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2018] [Revised: 05/18/2018] [Accepted: 07/08/2018] [Indexed: 11/30/2022]
Abstract
The smart polyphenol material could be designed to form two competitive interactions related to same one polyphenol molecule with different objects that could easily adhere to one surface through the weak interaction, and also could be entirely removed from the same surface by the strong interaction. In this study, the multi-scale pectin beads were fabricated by crosslinking with ions that could be acted as polyphenol loading agent through electrostatic force between the ions loading on the surface of pectin beads and polyphenol. The two effects on the size and appearance of pectin beads were detected. Because of the hydrogen bond between polyphenols loading on the beads and the surface of target, fluorescence-functionalized beads could easily adhere on target surfaces. Meanwhile, attributing to stronger electrostatic force between surface ions on beads and polyphenol, the thin membrane made of the beads can be entirely removed from the target surface to avoid the pollution of fluorescence probes.
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Affiliation(s)
- Juan Xu
- Research Institute of Resources Insects, Chinese Academy of Forestry, Kunming 650224, PR China
| | - Hongpo Zhou
- Research Institute of Resources Insects, Chinese Academy of Forestry, Kunming 650224, PR China; Faculty of Chemical Engineering, Kunming University of Science and Technology, Kunming 650550, PR China
| | - Kun Li
- Research Institute of Resources Insects, Chinese Academy of Forestry, Kunming 650224, PR China
| | - Jinju Ma
- Research Institute of Resources Insects, Chinese Academy of Forestry, Kunming 650224, PR China
| | - Wenwen Zhang
- Research Institute of Resources Insects, Chinese Academy of Forestry, Kunming 650224, PR China
| | - Lanxiang Liu
- Research Institute of Resources Insects, Chinese Academy of Forestry, Kunming 650224, PR China
| | - Yanlin Sun
- Research Institute of Resources Insects, Chinese Academy of Forestry, Kunming 650224, PR China
| | - Hong Zhang
- Research Institute of Resources Insects, Chinese Academy of Forestry, Kunming 650224, PR China.
| | - Kai Li
- Research Institute of Resources Insects, Chinese Academy of Forestry, Kunming 650224, PR China.
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7
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Yang Z, Yang H, Yang H. Characterisation of rheology and microstructures of κ-carrageenan in ethanol-water mixtures. Food Res Int 2018; 107:738-746. [DOI: 10.1016/j.foodres.2018.03.016] [Citation(s) in RCA: 24] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2018] [Revised: 03/02/2018] [Accepted: 03/04/2018] [Indexed: 10/17/2022]
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8
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Yang Z, Yang H, Yang H. Effects of sucrose addition on the rheology and microstructure of κ-carrageenan gel. Food Hydrocoll 2018. [DOI: 10.1016/j.foodhyd.2017.08.032] [Citation(s) in RCA: 115] [Impact Index Per Article: 19.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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9
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Tao Y, Hasan A, Deeb G, Hu C, Han H. Rheological and Mechanical Behavior of Silk Fibroin Reinforced Waterborne Polyurethane. Polymers (Basel) 2016; 8:E94. [PMID: 30979186 PMCID: PMC6432601 DOI: 10.3390/polym8030094] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/29/2015] [Revised: 03/01/2016] [Accepted: 03/03/2016] [Indexed: 11/16/2022] Open
Abstract
Waterborne polyurethane (WPU) is a versatile and environment-friendly material with growing applications in both industry and academia. Silk fibroin (SF) is an attractive material known for its structural, biological and hemocompatible properties. The SF reinforced waterborne polyurethane (WPU) is a promising scaffold material for tissue engineering applications. In this work, we report synthesis and characterization of a novel nanocomposite using SF reinforced WPU. The rheological behaviors of WPU and WPU-SF dispersions with different solid contents were investigated with steady shear and dynamic oscillatory tests to evaluate the formation of the cross-linked gel structure. The average particle size and the zeta potential of WPU-SF dispersions with different SF content were examined at 25 °C to investigate the interaction between SF and WPU. FTIR, SEM, TEM and tensile testing were performed to study the effects of SF content on the structural morphology and mechanical properties of the resultant composite films. Experimental results revealed formation of gel network in the WPU dispersions at solid contents more than 17 wt %. The conjugate reaction between the WPU and SF as well as the hydrogen bond between them helped in dispersing the SF powder into the WPU matrix as small aggregates. Addition of SF to the WPU also improved the Young's modulus from 0.30 to 3.91 MPa, tensile strength from 0.56 to 8.94 MPa, and elongation at break from 1067% to 2480%, as SF was increased up to 5 wt %. Thus, significant strengthening and toughening can be achieved by introducing SF powder into the WPU formulations.
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Affiliation(s)
- Yongzhen Tao
- Key Laboratory of Green Processing and Functional Textiles of New Textile Materials, Ministry of Education, Wuhan Textile University, Wuhan 430073, China.
| | - Anwarul Hasan
- Department of Mechanical and Industrial Engineering, College of Engineering, Qatar University, Doha 2713, Qatar.
- Biomedical Engineering, and Department of Mechanical Engineering, Faculty of Engineering and Architecture, American University of Beirut, Beirut 1107 2020, Lebanon.
- Biomaterials Innovation Research Center, Division of Biomedical Engineering, Department of Medicine, Brigham and Women's Hospital, Harvard Medical School, Cambridge, MA 02139, USA.
- Harvard-MIT Division of Health Sciences and Technology, Massachusetts Institute of Technology, Cambridge, MA 02139, USA.
| | - George Deeb
- Biomedical Engineering, and Department of Mechanical Engineering, Faculty of Engineering and Architecture, American University of Beirut, Beirut 1107 2020, Lebanon.
| | - Changkai Hu
- Key Laboratory of Green Processing and Functional Textiles of New Textile Materials, Ministry of Education, Wuhan Textile University, Wuhan 430073, China.
| | - Huipeng Han
- Key Laboratory of Green Processing and Functional Textiles of New Textile Materials, Ministry of Education, Wuhan Textile University, Wuhan 430073, China.
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10
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Hermansson E, Schuster E, Lindgren L, Altskär A, Ström A. Impact of solvent quality on the network strength and structure of alginate gels. Carbohydr Polym 2016; 144:289-96. [PMID: 27083820 DOI: 10.1016/j.carbpol.2016.02.069] [Citation(s) in RCA: 40] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2015] [Revised: 02/18/2016] [Accepted: 02/22/2016] [Indexed: 11/25/2022]
Abstract
The influence of the mixture of water and alcohols on the solubility and properties of alginate and its calcium-induced gels is of interest for the food, wound care and pharmaceutical industries. The solvent quality of water with increasing amounts of ethanol (0-20%) on alginate was studied using intrinsic viscosity. The effect of ethanol addition on the rheological and mechanical properties of calcium alginate gels was determined. Small-angle X-ray scattering and transmission electron microscopy were used to study the network structure. It is shown that the addition of ethanol up to 15% (wt) increases the extension of the alginate chain, which correlates with increased moduli and stress being required to fracture the gels. The extension of the polymer chain is reduced at 20% (wt) ethanol, which is followed by reduced moduli and stress at breakage of the gels. The network structure of gels at high ethanol concentrations (24%) is characterized by thick and poorly connected network strands.
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Affiliation(s)
- Elin Hermansson
- Applied Chemistry, Chemistry and Chemical Engineering, Chalmers University of Technology, Gothenburg, Sweden
| | - Erich Schuster
- Food and Bioscience, SP-Technical Research Institute of Sweden, Gothenburg, Sweden; SuMo Biomaterials, VINN Excellence Center, Chalmers University of Technology, Gothenburg, Sweden
| | - Lars Lindgren
- SuMo Biomaterials, VINN Excellence Center, Chalmers University of Technology, Gothenburg, Sweden; Mölnlycke Health Care, P.O. Box 130 80, SE-40252, Sweden
| | - Annika Altskär
- Food and Bioscience, SP-Technical Research Institute of Sweden, Gothenburg, Sweden; SuMo Biomaterials, VINN Excellence Center, Chalmers University of Technology, Gothenburg, Sweden
| | - Anna Ström
- Applied Chemistry, Chemistry and Chemical Engineering, Chalmers University of Technology, Gothenburg, Sweden; SuMo Biomaterials, VINN Excellence Center, Chalmers University of Technology, Gothenburg, Sweden.
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11
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Rheological behavior and microstructure of release-controlled hydrogels based on xanthan gum crosslinked with sodium trimetaphosphate. Food Hydrocoll 2016. [DOI: 10.1016/j.foodhyd.2015.09.006] [Citation(s) in RCA: 63] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
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12
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Shangguan Y, Liu M, Luo G, Zheng Q. Shear induced self-thickening of chitosan/β-cyclodextrin compound solution. RSC Adv 2016. [DOI: 10.1039/c6ra24608g] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
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13
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Yang JS, Zhou QQ, Han SY, Fang Y. Interaction Between Amphiphilic Alginate Esters and β-Cyclodextrin in Aqueous Solution. J Carbohydr Chem 2015. [DOI: 10.1080/07328303.2015.1008519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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14
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Injectable pectin hydrogels produced by internal gelation: pH dependence of gelling and rheological properties. Carbohydr Polym 2014; 103:339-47. [DOI: 10.1016/j.carbpol.2013.12.057] [Citation(s) in RCA: 103] [Impact Index Per Article: 10.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2013] [Revised: 12/10/2013] [Accepted: 12/11/2013] [Indexed: 12/19/2022]
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15
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Jin L, Tan Y, Shangguan Y, Lin Y, Xu B, Wu Q, Zheng Q. Multiregion Shear Thinning for Subsequent Static Self-Thickening in Chitosan-graft-polyacrylamide Aqueous Solution. J Phys Chem B 2013; 117:15111-21. [DOI: 10.1021/jp408782e] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Lei Jin
- MOE
Key Laboratory of Macromolecular Synthesis and Functionalization,
Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Yeqiang Tan
- MOE
Key Laboratory of Macromolecular Synthesis and Functionalization,
Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Yonggang Shangguan
- MOE
Key Laboratory of Macromolecular Synthesis and Functionalization,
Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Yu Lin
- MOE
Key Laboratory of Macromolecular Synthesis and Functionalization,
Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
| | - Bo Xu
- School
of Chemistry and Biochemistry, Georgia Institute of Technology, Atlanta, Georgia 30332, United States
| | - Qiang Wu
- College
of Engineering, Zhejiang Agricultural and Forestry University, Hangzhou 311300, China
| | - Qiang Zheng
- MOE
Key Laboratory of Macromolecular Synthesis and Functionalization,
Department of Polymer Science and Engineering, Zhejiang University, Hangzhou 310027, China
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16
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MICROSTRUCTURE AND RHEOLOGICAL BEHAVIOR OF FERROCENE-MODIFIED BRANCHED POLY(ETHYLENE IMINE) IN AQUEOUS SOLUTIONS. ACTA POLYM SIN 2013. [DOI: 10.3724/sp.j.1105.2013.13124] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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17
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Characterisation of commercial LM-pectin in aqueous solution. Carbohydr Polym 2013; 92:1133-42. [DOI: 10.1016/j.carbpol.2012.09.100] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2012] [Revised: 09/24/2012] [Accepted: 09/28/2012] [Indexed: 11/17/2022]
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18
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VITHANAGE CHANDRAR, GRIMSON MALCOLMJ, WILLS PETERR, HARRISON PAUL, SMITH BRONWENG. RHEOLOGICAL AND STRUCTURAL PROPERTIES OF HIGH-METHOXYL ESTERIFIED, LOW-METHOXYL ESTERIFIED AND LOW-METHOXYL AMIDATED PECTIN GELS. J Texture Stud 2010. [DOI: 10.1111/j.1745-4603.2010.00261.x] [Citation(s) in RCA: 20] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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19
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Beheshti N, Zhu K, Kjøniksen AL, Nyström B. Characterization of complexation and phase behavior of mixed systems of unmodified and hydrophobically modified oppositely charged polyelectrolytes. Colloid Polym Sci 2010. [DOI: 10.1007/s00396-010-2239-1] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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20
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Bhowmik M, Bain MK, Ghosh LK, Chattopadhyay D. Effect of salts on gelation and drug release profiles of methylcellulose-based ophthalmic thermo-reversible in situ gels. Pharm Dev Technol 2010; 16:385-91. [PMID: 20429816 DOI: 10.3109/10837451003774369] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022]
Abstract
The poor bioavailability and therapeutic response exhibited by conventional ophthalmic solutions may be overcome by the use of thermo-reversible in situ gel. The purpose of this study was to examine the influence of different salts on the gelation, rheology and drug release of in situ gel based on methylcellulose. The gel temperature of 1% w/v methylcellulose (MC) was 60?C. It was found that 5?7% w/v sodium chloride (NaCl), 8?9% w/v potassium chloride (KCl), or 5% w/v sodium bicarbonate (NaHCO(3)) was capable of decreasing the gel temperature below physiological temperature, i.e. 37?C. Rheological studies indicated a large increase in viscosity at 37?C with the addition of salts in MC solutions. The duration of drug release from MC solution was 1.5?h. The significant observation was that the duration of drug release increased from 1.5?h to 3?5?h from salted MC solutions depending on the concentration and the type of salt. So, it can be concluded that the salted MC solutions were a better alternative than the MC solution to enhance the ocular bioavailability of the drug.
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Affiliation(s)
- Manas Bhowmik
- Pharmaceutics Research Lab II, Department of Pharmaceutical Technology, Jadavpur University, Kolkata, India.
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21
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Song F, Zhang LM, Li NN, Shi JF. In situ crosslinkable hydrogel formed from a polysaccharide-based hydrogelator. Biomacromolecules 2010; 10:959-65. [PMID: 19275215 DOI: 10.1021/bm801500w] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Abstract
In situ crosslinkable hydrogel formed from an amphiphilic amylopectin-based hydrogelator in aqueous solution was investigated with respect to its viscoelasticity, structure as well as protein encapsulation and release. Different from the physical hydrogel formed from an aqueous amylopectin system of sufficiently high concentration, such a hydrogel could be formed rapidly at room temperature and exhibit enhanced viscoelastic properties, mechanical strength, and shear thinning behavior. In addition, it has a more complex network structure with a higher fractal dimension due to intermolecular hydrophobic interactions and macromolecular chain entanglements. By circular dichroism analyses and in vitro release experiments, this hydrogel material was found to have a great potential as new matrix for the entrapment and sustained release of bovine serum albumin.
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Affiliation(s)
- Fei Song
- Laboratory for Polymer Composite and Functional Materials, Institute of Polymer Science, School of Chemistry and Chemical Engineering, Sun Yat-Sen (Zhongshan) University, Guangzhou 510275, China
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22
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Structural characterization and surface activity of hydrophobically functionalized extracted pectins. Carbohydr Polym 2009. [DOI: 10.1016/j.carbpol.2009.07.007] [Citation(s) in RCA: 37] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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23
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Tho I, Kjøniksen AL, Knudsen KD, Nyström B. Effect of solvent composition on the association behavior of pectin in methanol–water mixtures. Eur Polym J 2006. [DOI: 10.1016/j.eurpolymj.2005.10.015] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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24
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Lu YL, Wu JY, Chan MC, Huang SM, Lin CS, Chiu TW, Liu YH, Wen YS, Ueng CH, Chin TM, Hung CH, Lu KL. Influence of Water Content on the Self-Assembly of Metal−Organic Frameworks Based on Pyridine-3,5-dicarboxylate. Inorg Chem 2006; 45:2430-7. [PMID: 16529462 DOI: 10.1021/ic0512577] [Citation(s) in RCA: 99] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Abstract
A 0D discrete molecule [Co(3,5-pdc)(H2O)5].2H2O (1) was obtained in quantitative yield from the reaction of CoCl2.6H2O and pyridine-3,5-dicarboxylate (3,5-pdc) in pure water solvent at ambient temperature. While a 1D zigzag chain species, [{Co(3,5-pdc)(H2O)4}.H2O]n (2), was produced in a water-rich environment, a 2D layer compound, [Co(3,5-pdc)(H2O)2]n (3), with a 6(3) topology was generated under a water-reduced condition and a 2D sheet structure, [{Cu(3,5-pdc)(py)2}.H2O.EtOH]n (4), was formed under a water-poor condition. Compounds 1, 2, and 4 were characterized by single-crystal X-ray diffraction analysis. The 1D zigzag chain 2 shows a recoverable collapsing property. Compound 4 adopts a 2D sheet structure with a 4.8(2) topology, observed for the first time for the 3,5-pdc-related metal-organic frameworks. Water content was found to be an important factor in determining the topologies of the products in the self-assembly of divalent metal ions (Co2+, Cu2+) and pyridine-3,5-dicarboxylate under mild conditions.
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Affiliation(s)
- Yi-Long Lu
- Institute of Chemistry, Academia Sinica, Taipei 115, Taiwan
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25
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26
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Galant C, Kjøniksen AL, Nguyen GTM, Knudsen KD, Nyström B. Altering Associations in Aqueous Solutions of a Hydrophobically Modified Alginate in the Presence of β-Cyclodextrin Monomers. J Phys Chem B 2005; 110:190-5. [PMID: 16471520 DOI: 10.1021/jp0518759] [Citation(s) in RCA: 55] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The formation of associative networks in semidilute aqueous solutions of hydrophobically modified alginate (HM-alginate) is dependent on intermolecular hydrophobic interactions. Addition of beta-cyclodextrin (beta-CD) monomers to the system provides decoupling of these associations via inclusion complex formation with the polymer hydrophobic tails. This results in a dramatic decrease in the viscoelastic response of the system and a more extended local structure of the polymer chains, as shown by small-angle neutron scattering (SANS) measurements. The zero-shear viscosity decreases about an order of magnitude when the beta-CD concentration is increased from 0 to 12 mm. The lifetime of the associative network decreases strongly with increasing levels of beta-CD addition. These findings clearly demonstrate that the hydrophobic association effect is efficiently reduced as the amount of beta-CD is increased. In the framework of drug delivery, this effect may be useful to improve the release of therapeutic molecules that can be entrapped in the polymer matrix.
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Affiliation(s)
- Céline Galant
- Department of Physics, Institute for Energy Technology, Post Office Box 40, N-2027 Kjeller, Norway
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