Results 121 to 130 of about 5,980,753 (177)

Detection and rapid differentiation of glucosamine, galactosamine, glucosamine uronic acid, and galactosamine uronic acid

Analytical Biochemistry, 1963
Abstract A method is presented for the rapid differentiation, on a micro scale, of glucosamine, galactosamine, glucosamine uronic acid, and galactosamine uronic acid by paper electrophoresis of their deamination products in borate buffer. A new spray reagent for the specific detection of the 2-amino-2-deoxy sugars is also described; this is based on ...
A R, WILLIAMSON, S, ZAMENHOF
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A modified uronic acid carbazole reaction

Analytical Biochemistry, 1962
Abstract A modification of Dische's carbazole reaction for uronic acid in the presence of borate is described. The advantages of the procedure are: 1. (1) There is an approximately twofold increase of sensitivity. The OD is a linear function of concentration between 4 and 40 μg/ml. 2. (2) Maximum color develops immediately. 3.
T, BITTER, H M, MUIR
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An automated quantitative assay for uronic acids

Biochemical Medicine, 1974
Abstract The adaptation to the auto-analyzer of a highly sensitive, quick and specific assay for quantitative determination of uronic acids in tissues and biological fluids is presented. The method is based on the formation of a chromogen, if, after heating in concentrated sulfuric acid for 8 min at 95°C, uronic acid is treated with meta ...
N, Blumenkrantz, G, Asboe-Hansen
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The Tollens Naphthoresorcinol Reaction for Uronic Acids

Nature, 1948
THE mechanism of colour production in the Tollens test1 for glucuronic acid is not definitely known, and since this reaction is frequently used for the determination of glucuronic acid in biological materials2, an attempt should be made to understand its chemistry. Some of our preliminary results to this end are now reported here.
A H, GUERRERO, R T, WILLIAMS
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Determination of the composition of uronic acid mixtures

Analytical Biochemistry, 1968
Abstract A method has been developed to determine the relative proportions of three uronic acids in a compound or mixture, which uses data obtained from analysis of samples by the carbazole method under four different reaction conditions. The method works equally well with synthetic mixtures and natural products, such as alginates.
C A, Knutson, A, Jeanes
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Mannopyranosyl Uronic Acid Donor Reactivity

Organic Letters, 2011
The reactivity of a variety of mannopyranosyl uronic acid donors was assessed in a set of competition experiments, in which two (S)-tolyl mannosyl donors were made to compete for a limited amount of promoter (NIS/TfOH). These experiments revealed that the reactivity of mannuronic acid donors is significantly higher than expected based on the electron ...
Marthe T C, Walvoort, Wilbert, de Witte, Jesse, van Dijk, Jasper, Dinkelaar, Gerrit, Lodder, Herman S, Overkleeft, Jeroen D C, Codée, Gijsbert A, van der Marel   +7 more
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Studies on uronic acid materials

Carbohydrate Research, 1968
Abstract Some of the analytical parameters for Acacia senegal gum have been determined for ( a ) twelve “bulk” samples of tapped gum from three different districts of the Sudan, and ( b ) thirteen, different, single-nodule specimens of “natural exudate” gum.
D.M.W. Anderson, I.C.M. Dea, K.A. Karamalla, J.F. Smith   +3 more
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Aldonic and Uronic Acids

1969
Publisher Summary This chapter describes the function of aldonic and uronic acids. These are intermediates in carbohydrate oxidation and function in the biosynthesis of cellular constituents, and these play a vital role in mammals. According to a recent discovery, uronic acid was found to be an antecedent of L-ascorbic acid in those animals that are ...
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CONFORMATIONS OF URONIC ACID CONTAINING POLYSACCHARIDES

Pure and Applied Chemistry, 1977
Abstract
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Uronic acid determination

Carbohydrate Research, 1975
Alezandre E. Castagne, Iqbal R. Siddiqui
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