Results 161 to 170 of about 2,687,981 (207)

The preparation and identification of various adducts of oxidized homogentisic acid and the development of a new sensitive colorimetric assay for homogentisic acid

Clinica Chimica Acta, 1971
Abstract Homogentisic acid was converted to 1,4-benzoquinone-2-acetic acid (BQA). BQA was shown to undergo adduct formation with a number of different compounds containing free amino or sulfhydryl groups, including diethylenetriamine (DET) and D-penicillamine.
T J, Lustberg, J D, Schulman, J E, Seegmiller   +2 more
openaire   +2 more sources

Microbial conversion of p-hydroxyphenylacetic acid to homogentisic acid

Canadian Journal of Microbiology, 1972
An unidentified bacterium degrades p-hydroxyphenylacetic acid by a pathway which involves homogentisic acid as an intermediate. Extracts of cells grown on p-hydroxyphenylacetic acid contain an enzyme that converts p-hydroxyphenylacetic acid to homogentisic acid.
openaire   +3 more sources

Homogentisic Acid Derivatives from Miliusa balansae

Journal of Natural Products, 2003
The new homogentisic acid derivatives miliusol (1b) and miliusolide (2) from Miliusa balansae were isolated and structurally determined by spectroscopic means. The relative configurations of the new 1b and its known acetate 1a were established. Furthermore, the symmetric ether bis(2-hydroxyphenyl)methyl ether 3, which was isolated for the first time ...
Do Thu, Huong, Christine, Kamperdick, Tran Van, Sung   +2 more
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Oxidation of homogentisic acid to ochronotic pigment in connective tissue

Biochimica et Biophysica Acta (BBA) - General Subjects, 1969
Abstract Ochronotic pigmentation of connective tissues occurs in individuals with alcaptonuria. An enzyme system, termed homogentisic acid polyphenol oxidase, has been identified in mammalian skin and cartilage which catalyzes the oxidation of homogentisic acid to an “ochronotic-like” pigment. Benzoquinoneacetic acid, a probable intermediary compound
V G, Zannoni, N, Lomtevas, S, Goldfinger
openaire   +2 more sources

Detection of Homogentisic Acid in Plasma and Urine

2015
Laboratory proof of alkaptonuria in urine is based on the reducing properties of homogentisic acid. Even routine chemical examination of urine can lead to diagnosis of alkaptonuria on the basis of characteristic colouration with Fehling’s solution. In patients with alkaptonuria who excrete 2–3 g of homogentisic acid/day, urine with Fehling’s solution ...
Mária Stančíková, Jozef Rovenský
openaire   +1 more source

Chemiluminescence during the oxidation of homogentisic acid

Russian Journal of Physical Chemistry A, 2011
Chemiluminescence (CL) that accompanies the autooxidation of homogentisic acid in the presence of an alkali was studied. Data on the red shift of the CL spectrum at increased medium polarity and the dependence of the luminescence intensity and light efficiency on the reagent concentration were obtained.
openaire   +1 more source

Homogentisic Acid

Acta Crystallographica Section C Crystal Structure Communications, 1995
N. Okabe, Y. Kohyama
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Kinetics of homogentisic acid autoxidation

Archives of Biochemistry and Biophysics, 1958
R A, MILCH, I C, MAGNUS
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Gas chromatography of urinary homogentisic acid

Analytical Biochemistry, 1966
R E, Bondurant, M, Greer, C M, Williams
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Formation of Gentisic Acid from Homogentisic Acid. VI

The Journal of Biochemistry, 1964
M, KANDA, H, WATANABE, S, UCHIYAMA, Y, NAKATA, Y, SAKAMOTO   +4 more
openaire   +2 more sources