Results 131 to 140 of about 4,136 (168)

An automated method for the determination of hexuronic acids

Analytical Biochemistry, 1965
Abstract 1. 1. An automated method is deseribed for the determination of hexuronic acids based on the carbazole reaction. 2. 2. The borate modification was found to be superior because of the increased color yield and the reduced interference caused by the presence of NaCl. 3. 3.
E A, Balazs, K O, Berntsen, J, Karossa, D A, Swann   +3 more
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Total synthesis of hexuronic acids

Carbohydrate Research, 1977
Six stereoisomeric hexuronic acids (tert-butyl esters of methyl pyranosides) having the altro, manno, gluco, gulo, galacto, and talo configurations were obtained from cis,trans-tert-butyl 2-methoxy-5,6-dihydro-2H-pyran-6-carboxylate (5). The synthesis involved the following successive steps: epoxidation of the double bond in 5, opening of the epoxides ...
J, Mieczkowski, A, Zamojski
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Color Reaction of Hexuronic Acids with Anthrone

Analytical Chemistry, 1956
J. R. Helbert, K. D. Brown
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Colorimetric determination of hexuronic acids in plant materials

Analytical Chemistry, 1979
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Hexuronic Acid Dehydrogenase of Agrobacterium tumefaciens

Journal of Bacteriology, 1969
Growth of Agrobacterium tumefaciens on d -glucuronic acid (GlcUA) or d -galacturonic acid (GalUA) induces formation of hexuronic acid dehydrogenase [ d -aldohexuronic acid: nicotinamide adenine dinucleotide (NAD) oxidoreductase].
Y F, Chang, D S, Feingold
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Vitamin C and Hexuronic Acid

Nature, 1932
IN connexion with experiments under the direction of Dr. L. J. Harris1 on the ro1e of the suprarenal gland in vitamin C metabolism, we have investigated the silver nitrate staining capacity of glands taken from normal and scorbutic animals. It will be recalled that long before the identity of vitamin C with hexuronic acid was postulated2,3, Szent ...
T. MOORE, S. N. RAY
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Crystallized Vitamin C and Hexuronic Acid

Science, 1937
After Szent-Gyorgyi won the Nobel prize, Cox addressed the controversy regarding the discovery of Vitamin C with this summary of research and publication by Szent-Gyorgyi, C. G. King, and others.
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Crystalline Structure of Hexuronic Acid

Nature, 1932
FROM a purified specimen of ‘hexuronic acid’ (identified by Szent-Gyorgyi with vitamin C) available in this laboratory I have been able to obtain sufficiently good crystals to carry out an X-ray examination by the single-crystal rotation method. The substance is monoclinic sphenoidal, with a = 17.71, b = 6.32, c = 6.38 A., and I² = 102½°, while the ...
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The Methyl Ethers of Hexuronic Acids

1954
Publisher Summary This chapter provides an overview of the methyl ethers of hexuronic acids. Hexuronic acid residues occur in a large number of different polysaccharides. The chapter focuses on the methyl ethers of the naturally occurring D-glucuronic, D-galacturonic, and D-mannuronic acids, and their derivatives.
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G.L.C. of the O-trimethylsilyl derivatives of hexuronic acids

Carbohydrate Research, 1976
The free acids, sodium salts, and lactones of several hexuronic acids have been studied as their O-trimethylsilyl derivatives by gas-liquid chromatography using SE-30 and XE-60 liquid phases. Silylation was best performed in methyl sulphoxide. The equilibrium between the various forms of a hexuronic acid in methyl sulphoxide was also studied by g.l.c ...
J F, Kennedy, S M, Robertson, M, Stacey
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