Topic
Gum arabic
About: Gum arabic is a research topic. Over the lifetime, 2197 publications have been published within this topic receiving 47782 citations. The topic is also known as: acacia gum.
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TL;DR: In this article, the same sample of A. senegal gum is degraded by autohydrolysis; the methylated autohydrosed gum contains 2,3,4,6-tetra-, 2,4-6-T, 6,O-β-D-Galactopyranosyl-D,D-galactose, 3-O-α-β-,D-G,D,Galactose and β-1,3-linked galactotriose, and trace amounts of 2.3,5-
Abstract: Acacia senegal gum is subjected to seven successive Smith degradations. The O-methyl derivatives of each of the polysaccharides obtained from the first five degradations are analysed, after methanolysis, by gas–liquid partition chromatography. After the fifth degradation, the O-methyl sugars characterised from the methylated polysaccharide are 2,3,4,6-tetra-, 2,4,6- and 2,3,4-tri-, and 2,6- and 2,4-di-O-methyl-D-galactose; partial acid hydrolysis of this galactan affords 6-O-β-D-galactopyranosyl-D-galactose, 3-O-β-D-galactopyranosyl-D-galactose, and the β1,3-linked galactotriose.The same sample of A. senegal gum is degraded by autohydrolysis; the methylated autohydrolysed gum contains 2,3,4,6-tetra-, 2,4,6- and 2,3,4-tri-, and 2,4-di-O-methyl-D-galactose, 2,3,4-tri-O-methyl-D-glucuronic acid, and trace amounts of 2,3,5-tri-O-methyl-L-arabinose.As a result of these investigations, modifications to the accepted structural features of the gum are proposed.
45 citations
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18 Sep 2019TL;DR: Results suggest that smart polyvinyl alcohol (PVA)-based hydrogels may act as an efficient photoprotective material and find their application in the field of drug delivery.
Abstract: The chemically oxidized gum arabic was prepared and used as a naturally derived nontoxic and pH-responsive cross-linker to develop smart polyvinyl alcohol (PVA)-based hydrogels for the first time. ...
44 citations
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TL;DR: In this paper, mesquite gum was the best emulsifying and stabilizing agent, followed by gum arabic and acacia gum, in all cases, pH had a dramatic effect on the emulsion stability against droplet coalescence and color degradation.
Abstract: Chilli oleoresin-in-water emulsions were stabilized with very low concentrations of mesquite (Prosopis juliflora), arabic (Acacia Senegal) and acacia (Acacia spp.) gums at different pH values in order to establish which polysaccharide had the best emulsifying capacity and provided the best stability against droplet coalescence and pigment degradation. Mesquite gum was the best emulsifying and stabilizing agent, followed by gum arabic and acacia gum. In all cases, pH had a dramatic effect on the emulsion stability against droplet coalescence and color degradation. The stabilizing mechanisms governing these two deteriorative processes were opposite. While coalescence kinetics was hindered at high pH values, color degradation kinetics took place at a higher rate, while the opposite effect occurred at lower pH values. A number of factors were important in determining the emulsifying capacity, the droplet coalescence stability and the color degradation stability of the gums among them, the protein content, the molecular weight, the surface charge and the steric configuration adopted at different pH values.
44 citations
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TL;DR: Scanning electron microscopy analysis showed that fish oil microcapsules were nearly spherical with a smooth surface with droplet size ranging from 1 to 10 μm, and a suitable viscosity and high emulsion stability could increase encapsulation efficiency and yield.
Abstract: Fish oil was encapsulated with gum arabic/casein/beta-cyclodextrin mixtures using spray drying. The processing parameters (solids concentration of the barrier solutions, ratio of oil to barrier materials, emulsifying temperature, and air inlet temperature) were optimized based on emulsion viscosity, emulsion stability, encapsulation efficiency, and yield. A suitable viscosity and high emulsion stability could increase encapsulation efficiency and yield. Encapsulation efficiency and yield were significantly affected by all the 4 parameters. Based on the results of orthogonal experiments, encapsulation efficiency and yield reached a maximum of 79.6% and 55.6%, respectively, at the optimal condition: solids concentration of 35%, ratios of oil to barrier materials of 3:7, emulsifying temperature of 55 °C, and air inlet temperature of 220 °C. Scanning electron microscopy analysis showed that fish oil microcapsules were nearly spherical with a smooth surface with droplet size ranging from 1 to 10 μm.
44 citations
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TL;DR: In this paper, the authors take advantage of the polyelectrolyte character exhibited by the natural gum ChichA (Sterculia striata), extracted in the Northeastern region of Brazil, to produce electroactive nanocomposites.
44 citations