Topic
Guar gum
About: Guar gum is a research topic. Over the lifetime, 5611 publications have been published within this topic receiving 105940 citations.
Papers published on a yearly basis
Papers
More filters
TL;DR: In this article, the first known report regarding synthesis and characterization of pure xanthan and guar aerogels was presented, and the results showed that the resulting dry materials were highly porous and possessed some outstanding properties.
Abstract: Aerogels are outstanding materials, obtained by the sol–gel process. The production of polysaccharide aerogels is however time-consuming and their use for life-science applications is limited. To accelerate the production time, ethanol was used to induce the gelation of pectin, alginate, xanthan and guar gum. Polysaccharide aerogels were produced by dissolution in water, gelation in ethanol and supercritical drying. Only ethanol was used for the gelation without the use of any other cross-linking agent. In addition there was no solvent-exchange step prior to supercritical drying since the gelation occurred directly in ethanol. Differential scanning calorimetry was used to analyze the decompositions of the samples and also to measure their thermal conductivities. SEM and rheological analyses were performed in order to characterize the new materials. The prepared dry materials were highly porous and possessed some outstanding properties, namely, the low-methoxyl and high-methoxyl pectin monolithic aerogels possessed the highest surface areas yet reported, 510 m2 g−1 and 390 m2 g−1, respectively. To our knowledge this is the first known report regarding synthesis and characterization of pure xanthan and guar aerogels. Their surface areas were also high, 370 m2 g−1 and 110 m2 g−1, respectively. Very low thermal conductivity was observed for pectin aerogels, 0.021 W m−1 K−1.
58 citations
TL;DR: Guar gum, a galactomannan derived from the endosperms of Cyamposis tetragonoloba, has been successfully used as a sole gelling agent for plant tissue culture media for in vitro seed germination and morphogenic responses were better on guar gum-gelled media than on agar media.
Abstract: Guar gum, a galactomannan derived from the endosperms of Cyamposis tetragonoloba, has been successfully used as a sole gelling agent for plant tissue culture media. Its suitability as a gelling agent was demonstrated by using guar gumgelled media for in vitro seed germination of Linum usitatissimum and Brassica juncea, in vitro axillary shoot proliferation in nodal explants of Crataeva nurvala, rooting of regenerated shoots of the same, in vitro androgenesis in anther cultures of Nicotiana tabacum, and somatic embryogenesis in callus cultures of Calliandra tweedii. The media used for these were gelled with either guar gum (2, 3, or 4%) or agar (0.9%). Guar gum-gelled media, like agar media, supported all these morphogenic responses. Rather, axillary shoot proliferation, rhizogenic and embryogenic responses were better on guar gum-gelled media than on agar media.
58 citations
TL;DR: It is suggested that WSDF indirectly enhanced the Ig production of lymphocytes, and that serum lipid reduction and IgA production-enhancing activities of WSDF were dependent on their molecular sizes.
Abstract: The dietary effect of the water-soluble dietary fibers (WSDF), guar gum, partially hydrolyzed guar gum (PHGG), glucomannan, highly methoxylated (HM) pectin, on the serum lipid level and immunoglobulin (Ig) production of Sprague-Dawley rats was compared with that of water-insoluble cellulose. Although serum total cholesterol and triglyceride levels were significantly lower in the rats fed with WSDF than in those fed with cellulose, a decrease in the level of phospholipids was only observed in the rats that had been fed on guar gum or glucomannan. In addition, all WSDF feeding enhanced IgA productivity in the spleen and mesenteric lymph node lymphocytes, although the increase in serum IgA level was only observed in the rats fed on WSDF, and not on PHGG. When mesenteric lymph node lymphocytes were cultured in the presence of various concentrations of guar gum or glucomannan, no significant increase in Ig production was apparent. These data suggest that WSDF indirectly enhanced the Ig production of lymphocytes, and that serum lipid reduction and IgA production-enhancing activities of WSDF were dependent on their molecular sizes.
58 citations
TL;DR: In this paper, the effects of guar gum (20 and 30 grams) in combination with microbial transglutaminase (TGase) (0, 1 and 10 ǫg−1 pro) on the quality parameters of gluten-free bread, based on rice flour were investigated.
58 citations
TL;DR: In this article, the viscosity of trehalose and sucrose solutions was measured and compared as well as the effect of adding guar gum, with the biggest difference in the range 30-45 g/100 g.
Abstract: The viscosity of trehalose and sucrose solutions was measured and compared as well as the effect of adding guar gum. Viscosity measurements of trehalose and sucrose solutions were performed in the range 20–45 g/100 g; 0.1 g guar gum/100 g was added in mixed systems. Viscosity of trehalose or sucrose solutions was measured at 20, 27 and 34 °C. Trehalose solutions had always a higher viscosity than sucrose, with the biggest difference (p < 0.001) in the range 30-45 g/100 g. Addition of guar gum revealed a synergistic effect with both disaccharides, particularly for trehalose. Viscosity dependence on temperature was also analyzed by calculating activation energies for all systems studied.
57 citations