Subject: 3 selected - PubAg Search Results

Author:: Wang, Jichao; Ying, Xiaoguang; Liu, Jiangquan; Li, Xiao; Zhang, Weiying
Source:: International journal of biological macromolecules 2015 v.81 pp. 11-16
ISSN:: 0141-8130
Subject:: Fourier transform infrared spectroscopy; X-ray diffraction; calcium; calcium alginate; crosslinking; hydrocolloids; hydrophobicity; oxidants; polymerization; polymers; reducing agents; scanning electron microscopy; sodium alginate; temperature; thermal stability; urethane
Abstract:: ... Vinyl group capped urethane acrylate (UA) was prepared with diisocyanate (IPDI), hydroxyethyl methacrylate (HEMA) and dimethylolpropionic acid (DMPA). The UA was grafted onto sodium alginate via free-radical polymerization with KPS/Na2SO3 as initiator and then crosslinked by Ca2+. Grafted polymers (UA-g-CaA) were characterized by FT-IR, SEM, TGA, XRD and tension gauge. The swelling behavior was al ...
DOI:: 10.1016/j.ijbiomac.2015.07.021
: http://dx.doi.org/10.1016/j.ijbiomac.2015.07.021

Author:: Malakar, Jadupati; Nayak, Amit Kumar; Pal, Dilipkumar
Source:: International journal of biological macromolecules 2012 v.50 no.1 pp. 138-147
ISSN:: 0141-8130
Subject:: Fourier transform infrared spectroscopy; calcium alginate; cloxacillin; drugs; gastric juice; hydroponics; in vitro studies; models; pH; polymers; response surface methodology; scanning electron microscopy
Abstract:: ... This work investigates the development, optimization and in vitro evaluation of liquid paraffin-entrapped multiple-unit alginate-based floating system containing cloxacillin by emulsion–gelation method for gastro retentive delivery. The effect of process variables like drug to polymer ratio by weight, and liquid paraffin to water ratio by volume on various physicochemical properties in case of liq ...
DOI:: 10.1016/j.ijbiomac.2011.10.001
: http://dx.doi.org/10.1016/j.ijbiomac.2011.10.001

Author:: Pathak, Tara Sankar; Yun, Jung-Ho; Lee, Se-Jong; Baek, Dae-Jin; Paeng, Ki-Jung
Source:: Journal of polymers and the environment 2010 v.18 no.1 pp. 45-56
ISSN:: 1566-2543
Subject:: 1-propanol; Fourier transform infrared spectroscopy; Undaria pinnatifida; calcium alginate; ethanol; heat; methanol; polymers; porosity; solvents; thermal analysis; thermal stability; weight loss
Abstract:: ... Alginates, extracted from algae are linear unbranched polymers containing β-(1→4)-linked d-mannuronic acid (M) and α-(1→4)-linked l-guluronic acid (G) residues. The conversion of alginic acid into the metal alginate is confirmed using FTIR spectroscopy. Asymmetric and symmetric stretching of free carboxyl group present in metal alginate occurs almost at the same position in various solvent composi ...
DOI:: 10.1007/s10924-009-0156-5
: http://dx.doi.org/10.1007/s10924-009-0156-5

Author:: Dalponte, Ithiara; de Sousa, Bianca Cristina; Mathias, Alvaro Luiz; Jorge, Regina Maria Matos
Source:: International journal of biological macromolecules 2019 v.137 pp. 992-1001
ISSN:: 0141-8130
Subject:: Fourier transform infrared spectroscopy; X-ray diffraction; acetic acid; calcium alginate; calcium carbonate; discoloration; energy-dispersive X-ray analysis; gelation; industrial wastewater; mixing; photocatalysis; photocatalysts; polymers; response surface methodology; scanning electron microscopy; sodium bicarbonate; tartrazine; thermogravimetry; titanium dioxide; ultraviolet radiation
Abstract:: ... For the first time, TiO2 immobilized in alginate polymer was modified to turn it into a buoyant photocatalyst for achieving both higher radiance utilization efficiency and easier post-treatment separation. In this work, the low-density TiO2 alginate-based photocatalyst was synthesized by ionotropic gelation using a gas-forming agent (CaCO3, NaHCO3) in an acid medium (CH3COOH). The TiO2, CaCO3, and ...
DOI:: 10.1016/j.ijbiomac.2019.07.020
: https://dx.doi.org/10.1016/j.ijbiomac.2019.07.020

Author:: Ghosal, Kajal; Das, Arijit; Das, Sanjoy Kumar; Mahmood, Syed; Ramadan, Mohamed Abdel Monem; Thomas, Sabu
Source:: International journal of biological macromolecules 2019 v.130 pp. 645-654
ISSN:: 0141-8130
Subject:: Fourier transform infrared spectroscopy; biocomposites; biodegradability; calcium alginate; composite films; cross-linking reagents; crosslinking; diclofenac; differential scanning calorimetry; drug delivery systems; drugs; gelation; permeability; polymers; scanning electron microscopy; water vapor
Abstract:: ... This study aimed to develop and characterize the calcium alginate films loaded with diclofenac sodium and other hydrophilic polymers with different degrees of cross-linking obtained by external gelation process. To the formed films different physicochemical evaluation were performed which showed an initial character of the films. The films produced by this external gelation process were found thic ...
DOI:: 10.1016/j.ijbiomac.2019.02.117
: https://dx.doi.org/10.1016/j.ijbiomac.2019.02.117

Author:: Patel, Mitulkumar A.; AbouGhaly, Mohamed H.H.; Schryer-Praga, Jacqueline V.; Chadwick, Keith
Source:: Carbohydrate polymers 2017 v.155 pp. 362-371
ISSN:: 0144-8617
Subject:: Fourier transform infrared spectroscopy; calcium; calcium alginate; crosslinking; drugs; energy-dispersive X-ray analysis; gelation; ions; particle size; polymers; porosity; strength (mechanics)
Abstract:: ... The ability to engineer biocompatible polymers with controllable properties is highly desirable. One such approach is to cross-link carbohydrate polymers using ionotropic gelation (IG). Previous studies have investigated the effect of curing time on alginate cross-linking. Herein, we discuss a novel study detailing the effect of IG residence time (IGRT) on the cross-linking of alginate with calciu ...
DOI:: 10.1016/j.carbpol.2016.08.095
: https://dx.doi.org/10.1016/j.carbpol.2016.08.095

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