Results 131 to 140 of about 7,545 (189)

Viscosity of guar gum and xanthan/guar gum mixture solutions

Journal of the Science of Food and Agriculture, 2000
The viscosity of diluted guar gum solutions and the viscosity of xanthan and guar gum mixture solutions have been studied. Guar gum solutions showed pseudoplastic behaviour. Apparent viscosity increased with gum concentration and decreased with the temperature at which viscosity was measured.
Felix García-Ochoa, A F Mohedano
exaly   +2 more sources

Carbamoylethylation of guar gum

Carbohydrate Polymers, 2004
Carbamoylethylation of guar gum was carried out with acrylamide in presence of sodium hydroxide under different reaction conditions. Variables studied were concentration of sodium hydroxide, acrylamide, guar gum as well as reaction temperature and time. The nitrogen content, carboxyl content and total ether content were determined.

exaly   +2 more sources

Fluoroacetic acid in guar gum

Food and Chemical Toxicology, 1984
The toxicity of guar gum, derived from the Indian leguminous plant Cyamopsis tetragonolobus, is thought to be due to a globulin which can be denaturated and made non-toxic. Another very toxic compound, fluoroacetic acid, has been detected at a low level in raw samples of guar gum (0.07-1.42 micrograms fluoroacetic acid/g).
T, Vartiainen, J, Gynther
openaire   +2 more sources

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
openaire   +1 more source

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
openaire   +2 more sources

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
openaire   +2 more sources

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
openaire   +2 more sources

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
openaire   +2 more sources

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
openaire   +2 more sources

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
openaire   +2 more sources