Results 141 to 150 of about 10,377 (192)

Automated ion-exchange chromatography of uronic acids and uronic acid containing oligosaccharides

Analytical Biochemistry, 1968
Abstract An automated anion-exchange chromatographic procedure for the separation of uronic acids and uronic acid containing oligosaccharides is described. The method has been applied, in particular, to the separation and quantitation of l -iduronic and d -glucuronic acid in hydrolyzates of dermatan sulfate, and the hydrolysis conditions required ...
L A, Fransson, L, Rodén, M L, Spach
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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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Uronic acid determination

Talanta, 1958
Abstract Modifications of the McCready, Swensen and Maclay apparatus for uronic acid determination are described which enable determinations to be made on 20-mg samples.
S.A. Barker, A.B. Foster, I.R. Siddiqui, M. Stacey   +3 more
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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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Uronic Acids in Oligosaccharide and Glycoconjugate Synthesis

2010
This chapter describes the assembly of uronic acid containing oligosaccharides and glycoconjugates. Two strategies are available to access these target molecules, namely a pre-glycosylation oxidation approach, in which uronic acid building blocks are used, and a post-glycosylation oxidation strategy, which employs an oxidation step after the assembly ...
Jeroen D C, Codée, Alphert E, Christina, Marthe T C, Walvoort, Herman S, Overkleeft, Gijsbert A, van der Marel   +4 more
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