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Guar gum
About: Guar gum is a research topic. Over the lifetime, 5611 publications have been published within this topic receiving 105940 citations.
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TL;DR: The interfacial activity was surprisingly better than other galactomannans (interfacial tension was reduced to 2 mN/m in vegetable oils) which led to the formation of oil-in-water emulsions with small droplet size (2–3 μm) and long-term stability.
Abstract: Fenugreek gum was extracted from fenugreek seeds and evaluated for its surface activity. This unique galactomannan has a mannose backbone grafted with galactose units at an average ratio of one. The purified fenugreek gum was found to reduce surface tension to values lower than guar gum (42 and 55 mN/m, respectively). The interfacial activity was surprisingly better than other galactomannans (interfacial tension was reduced to 2 mN/m in vegetable oils) which led to the formation of oil-in-water emulsions with small droplet size (2–3 μm) and long-term stability. The fenugreek gum was found to adsorb (or ‘precipitate’) on the oil interface forming a relatively thick interfacial film. The emulsions are more stable than any equivalent emulsions stabilized by other galactomannan gums. No flocculation was observed in emulsions stabilized with fenugreek concentrations sufficient for a good coverage of the oil interface as expressed by the coverage index (Rc) correlated to the gum/oil weight ratio (Rc>12).
151 citations
TL;DR: Infusion of meals containing starch showed that a decrease in the digestion rate of starch in the upper small intestine accounted for part of the effect of viscosity on glycemic response, whereas the main effect of guar gum was apparently to slow gastric emptying.
149 citations
TL;DR: In this paper, the use of stabilizers in traditionally manufactured ayran to prevent serum separation during storage was studied and the samples were evaluated for rheological and sensory properties and serum separation for 15 days at 4 °C.
149 citations
TL;DR: The in vitro release study indicated that the release from these microspheres is not only dependent upon the extent of cross-linking, but also on the amount of the drug loaded as well as the method of drug loading.
Abstract: Poly(vinyl alcohol)-guar gum interpenetrating network microspheres were prepared by cross-linking with glutaraldehyde. Nifedipine, an antihypertesive drug, was loaded into these matrices before and after cross-linking to study its release patterns. The extent of cross-linking was analyzed by Fourier transform infrared spectroscopy and differential scanning calorimetry. Furthermore, the microspheres were characterized for drug entrapment efficiency, particle size, transport of water into the matrix and drug release kinetics. Scanning electron microscopic photographs confirmed the spherical nature and surface morphology. The mean particle size of the microspheres was found to be around 300 μm. The molecular transport phenomenon, as studied by the dynamic swelling experiments, indicated that an increase in cross-linking affected the transport mechanism from Fickian to non-Fickian. The in vitro release study indicated that the release from these microspheres is not only dependent upon the extent of cross-link...
149 citations
TL;DR: The results showed that SG has good potential for use in producing an edible film for various food applications and was less mechanically resistant than LBG but more flexible than galactomannan films.
149 citations