Results 151 to 160 of about 71,483 (206)

Rheological properties of guar gum and hydroxyethyl guar gum in aqueous solution

International Journal of Biological Macromolecules, 1987
Abstract The rheological properties of aqueous solutions of guar gum (GG) and hydroxyethyl guar gum (HEG) have been investigated. The flow properties of these polysaccharide solutions were studied at the shear rate in the range 1.5–1310s−1 using a Rheotest-2 viscometer.
S.P. Patel, G. Ranjan, V.S. Patel
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Study of the teratogenic potential of guar gum

Food and Chemical Toxicology, 1987
Guar gum in the diet at 0, 1, 2, 4, 7.5 or 15% was available ad lib. to male and female Osborne-Mendel rats for 13 wk before mating, during mating and throughout gestation. During gestation, the females consumed 0, 0.7, 1.4, 2.7, 5.2 or 11.8 g guar gum/kg of body weight/day, respectively. The animals were killed on gestation day 20.
T F, Collins, J J, Welsh, T N, Black, S L, Graham, M W, O'Donnell   +4 more
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Modification of hydroxypropyl guar gum with ethanolamine

Carbohydrate Polymers, 2012
A new guar gum derivative containing amino group was synthesized through nucleophilic substitution of p-toluenesulfonate activated hydroxypropyl guar gum with ethanolamine. For the preparation of p-toluenesulfonate esters hydroxypropyl guar gum, the results showed that the reaction rate was optimal at 25 °C and the reaction could reach equilibrium ...
Yongchao, Zhao, Jianping, He, Xiaoxiao, Han, Xiulin, Tian, Mingyu, Deng, Weiping, Chen, Bo, Jiang   +6 more
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Purification of guar gum for biological applications

International Journal of Biological Macromolecules, 2007
Commercial guar gum (GG) was purified by four different methods and characterized by gel permeation chromatography (GPC), thermogravimetric analysis and the determination of monosaccharides composition, protein and copper content, turbidity, intrinsic viscosity and rheological parameters.
Pablyana L R, Cunha, Regina C M de, Paula, Judith P A, Feitosa   +2 more
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Subchronic effects of guar gum in rats

Food and Cosmetics Toxicology, 1981
Abstract Male and female Osborne-Mendel rats, approximately 4 wk old, were fed guar gum for 91 days at levels of 0, 1·0, 2·0, 4·0, 7·5 or 15·0% in the diet. Body weights, organ weights, haematology, clinical chemistry and histology were the criteria studied. Guar gum significantly reduced body weights in females of all the treated groups and in males
S L, Graham, A, Arnold, L, Kasza, G E, Ruffin, R C, Jackson, T L, Watkins, C H, Graham   +6 more
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Synthesis and Characterization of Quaternary Ammonium Compounds of Guar Gum and Hydroxyethyl Guar Gum

Starch - Stärke, 1989
AbstractThe quaternary ammonium compounds of guar gum (QAGG) and hydroxylethyl guar gum ether (QAHEG) were prepared by the reaction of guar gum (GG) or hydroxyethyl guar gum ether (HEG) with amine condensates of epichlorohydrin using either aliphatic or heterocyclic tertiary amines.
S. P. Patel, R. G. Patel, V. S. Patel
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Preparation and characterization of guar gum nanoparticles

International Journal of Biological Macromolecules, 2010
The preparation of guar gum nanoparticles by nanoprecipitation and cross-linking method is reported here. Nanoparticles act as potential carries for several classes of drugs and cosmetics. It has been found that the formation of nanoparticles depends upon the molecular mass of the galactomannan, solvent, surfactant, cross-linker and agitation.
Rema Sreenivasan, Soumya, Swapankumar, Ghosh, Emilia T, Abraham   +2 more
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Occupational asthma caused by guar gum

Journal of Allergy and Clinical Immunology, 1990
Some vegetable gums have been reported to cause asthma. We describe three subjects who were exposed at work to guar gum, which is derived from the outer part of Cyanopsis tetragonolobus, a vegetable that grows in India. The first subject worked for a pharmaceutical company; the second and third subjects worked at a carpet-manufacturing plant. All three
F, Lagier, A, Cartier, J, Somer, J, Dolovich, J L, Malo   +4 more
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Effect of guar gum on blood lipids

The American Journal of Clinical Nutrition, 1981
The effect of guar gum in capsule form on serum total cholesterol, triglycerides, and lipoprotein cholesterol (very low-density lipoproteins, low-density lipoproteins, and high-density lipoproteins) was studied in healthy volunteers in this double-blind study. Twenty-four subjects equally divided into treatment and placebo groups, received 9.0 g/day of
A R, Khan, G Y, Khan, A, Mitchel, M A, Qadeer   +3 more
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Comparative studies on the flocculation characteristics of polyacrylamide grafted guar gum and hydroxypropyl guar gum

Polymer International, 2001
AbstractThe synthesis of two polysaccharide‐based graft copolymers with acrylamide, guar gum grafted polyacrylamide (GG‐g‐PAM) and hydroxypropyl guar gum grafted polyacrylamide (HPG‐g‐PAM) is described. The graft copolymers have been characterized by viscometry, infrared spectroscopy and thermal analysis.
B R Nayak, R P Singh
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