Quinoxalines Formed from α-1, 4 Glucans by Reaction with o-Phenylenediamine in Aqueous Alkaline Solution
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چکیده
منابع مشابه
Capillary electrophoresis of o-phenylenediamine derivatives (quinoxalines) of dicarbonyl sugars
Dicarbonyl sugars were separated by capillary electrophoresis as o-phenylenediamine derivatives (quinoxalines). Tetrabutylammonium bromide was used as a modifier; n-arabino-2-hexosulose (n-glucosone), D-lyxo-2-hexostdose (D-gdaCtOSOnC), 7-deoxy-L-galacto-2-hexosulose and 5-hydroxy-2,3dioxohexanal served as standards. The separation procedure was optimized with respect to pH, buffer and solute c...
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When the horseradish peroxidase reaction is stopped with acid, the decay of unconverted hydrogen peroxide is responsible for the further oxidation of o-phenylenediamine. This leads to a time-dependent flattening of the standard curve in the enzyme immunoassay, after the reaction has been stopped. Addition of reducing agents, such as sulphite ions, to the stopping solution, prevents the further ...
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Dihydroxymethyl radical (1) was found to react with oxygen diffusion controlled (k = 4.5 x 109 M _ 1 s 1 ) . The final products of the reaction are formic acid and 1/2 hydrogen peroxide. The precursor of H2O2 was shown to be O2' which is formed with G(02" -) = 6.3 (a value which includes the 02"~ formed by H atoms and oxygen (G(H) = 0.55)). If it is assumed that dihydroxymethylperoxyl radicals ...
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ژورنال
عنوان ژورنال: Agricultural and Biological Chemistry
سال: 1971
ISSN: 0002-1369,1881-1280
DOI: 10.1271/bbb1961.35.793