Showing papers on "Guar gum published in 1970"
TL;DR: The effects of pH, substrate concentration, inhibitors, and temperature on the catalytic activity of the crystalline enzyme are described.
94 citations
Patent•
20 Oct 1970
TL;DR: In this paper, a process for forming a thickened AQUEOUS mixture is described, which is a mixture of a RELATIVELY UNDEGRADED GUAR GUM and a non-undegraded guar gum.
Abstract: A MIXTURE OF A RELATIVELY UNDEGRADED GUAR GUM HAVING A VISCOSITY AT A CONCENTRATION OF 1% BY WEIGHT IN WATER OF ABOUT 500 CENTIPOISES OR MORE WITH A POLYACRYLAMIDE HAVING A DEGREE OF POLYMERIZATION BETWEEN ABOUT 12,000 AND ABOUT 250,000 WITH THE WEIGHT RATIO OF GUAR GUM TO POLYACRYLAMIDE RANGING FROM ABOUT 0.5:1 TO ABOUT 50:1 OR HIGHER. A PROCESS FOR FORMING A THICKENING COMPOSITION BY ADMIXING A RELATIVELY UNDEGRADED GUAR GUM HAVING A 1% BY WEIGHT AQUEOUS VISCOSITY OF ABOUT 500 CENTIPOISES OR HIGHER WITH A POLYACRYLAMIDE HAVING A DEGREE OF POLYMERIZATION BETWEEN ABOUT 12,000 AND ABOUT 250,000 AT A WEIGHT RATIO OR GUAR GUM TO POLYACRYLAMIDE RANGING FROM ABOUT 0.5:1 TO ABOUT 50:1 OR HIGHER. A THICKENED AQUEOUS MEDIUM CONTAINING A MIXTURE OF A RELATIVELY UNDEGRADED GUAR GUM HAVING A 1% AQUEOUS VISCOSITY OF ABOUT 500 CENTIPOISES OR HIGHER WITH A POLYACRYLAMIDE HAVING A DEGREE OF POLYMERIZATION BETWEEN ABOUT 12,000 AND 250,000 AT A WEIGHT RATIO OF GUAR GUM TO POLYACRYLAMIDE RANGING FROM ABOUT 0.5:1 TO ABOUT 50:1 OR HIGHER WITH THE MIXTURE BEING PRESENT IN AN AMOUNT WHICH IS EFFECTIVE TO SYNERGISTICALLY INCREASE THE VISCOSITY OF THE AQUEOUS MEDIUM.
13 citations
TL;DR: Some of the interesting points which came to notice from an experimental investigation into the behaviour of dilute aqueous solutions of commercial quality Guar Gum are described.
Abstract: THIS communication describes in brief some of the interesting points which came to notice from an experimental investigation into the behaviour of dilute aqueous solutions of commercial quality Guar Gum.
7 citations
Patent•
26 May 1970TL;DR: The KALI METAL CARBOXYALKYL DERIVATIVES as discussed by the authors was developed by using a combination of Reactant RATIOS and an ALCOHOL-WATER SOLVENT system.
Abstract: THE HYDRATION RATE OF POLYGALACTOMANNANS SUCH AS GUAR GUM IS SUBSTANTIALLY IMPROVED BY FORMING THE ALKALI METAL CARBOXYALKYL DERIVATIVES THEREOF USING DEFINED REACTANT RATIOS AND AN ALCOHOL-WATER SOLVENT SYSTEM.
3 citations
TL;DR: Alginate was the only effective agent against radiostrontium retention, approaching, at the 10% level, 70% less 89Sr skeletally retained than radio-control animals and a 3-fold improvement over natural biological strontium-calcium discrimination.
Abstract: SummaryAt levels of 1, 5, and 10%, sodium alginate, guar gum, carboxymethyl guar gum, and Questran were tested in diets fed to rats to determine their effects on radiostrontium skeletal retention. Alginate was the only effective agent against radiostrontium retention, approaching, at the 10% level, 70% less 89Sr skeletally retained than radio-control animals and a 3-fold improvement over natural biological strontium-calcium discrimination. The strontium-binding ability shown by alginate was probably clue to its functional carboxyl groups.
3 citations
Patent•
29 Jul 1970
TL;DR: In this paper, the authors proposed a method for cleaning artificial and natural stone surfaces by treatment with an aqueous mixture containing an alkali metal hydroxide, a salt of the same alkali with a weak acid, a thickening agent and water, the contact time being at most such that the treating mixture was not allowed to dry on the surfaces and thereafter washing the stone surfaces with water or steam.
Abstract: 1,200,677. Cleaning buildings. D. BOENIGER [trading as DAVID BOENIGER, STEINREINIGUNG]. 15 May, 1968 [19 May, 1967], No. 22982/68. Heading A4F. [Also in Division C5] Natural and artificial stone surfaces are cleaned by treatment with an aqueous mixture containing an alkali metal hydroxide, a salt of the same alkali metal with a weak acid, a thickening agent and water, the contact time being at most such that the treating mixture is not allowed to dry on the surfaces, and thereafter washing the stone surfaces with water or steam. The preferred alkali metal hydroxide is that of sodium, and the preferred weak acid is acetic acid, although formic, propionic, lactic, citric, boric, carbonic, hydrofluoric, sulphurous, tetraboric, and phosphoric acids are also specified. The preferred thickening agent is potato starch, polyvinyl alcohol, or carboxy methyl cellulose. Other thickening agents specified are maize starch, wheat flour, maize flour, acacia gum, carragheen, tragacanth, guar gum, gelatin, agar, cellulose, ethyl, hydroxyethel, acetyl and benzyl cellulose, cellulose aceto butyrate or aceto propionate, polyacrylic acids and their sodium or potassium salts, and polymethacrylic acid.
1 citations
Journal Article•
1 citations