Caesium hexachlororhodate(IV): An authentic compound of rhodium(IV)

Polyhedron ◽  
1996 ◽  
Vol 15 (2) ◽  
pp. 339-348 ◽  
Author(s):  
Ian J. Ellison ◽  
R.D. Gillard
Keyword(s):  
Authentic Compound

Proof of the formation of hydroperoxymethyl formate in the ozonolysis of ethene: synthesis and FT-IR spectra of the authentic compound

1996 ◽  
Vol 258 (1-2) ◽  
pp. 155-158 ◽  
Author(s):  
J. Thamm ◽  
S. Wolff ◽  
W.V. Turner ◽  
S. Gäb ◽  
W. Thomas ◽  
...  
Keyword(s):  
Ir Spectra ◽  
Authentic Compound ◽  
Ft Ir

METABOLISM OF 6-CHLORO-9α,10α-PREGNA-1,4,6-TRIENE-3,20-DIONE IN RAT, RABBIT, MONKEY AND MAN

1973 ◽  
Vol 74 (1) ◽  
pp. 127-143
Author(s):  
H. Breuer ◽  
D. E. Kime ◽  
R. Knuppen
Keyword(s):  
Human Subjects ◽  
Total Radioactivity ◽  
Female Rats ◽  
Male Rats ◽  
Gas Chromatography Mass Spectrometry ◽  
Main Metabolite ◽  
Polar Metabolite ◽  
Liver Slices ◽  
Authentic Compound ◽  
Female Rhesus Monkey

ABSTRACT When 6-chloro-9β,10α-pregna-1,4,6-triene-3,20-dione (trengestone) was incubated with liver slices of male rats, the substrate was rapidly transformed to a polar metabolite; in contrast, liver slices of female rats metabolised trengestone much more slowly, and only traces of a polar metabolite could be detected. After paper and thin layer chromatography in various systems, the polar metabolite was obtained in crystalline form and identified as 6-chloro-16α-hydroxy-9β,10α-pregna-1,4,6-treiene-3,20-dione (16α-hydroxytreengestone) by its infrared spectrum and by gas chromatography-mass spectrometry. After administration of trengestone to male or female rats, the main metabolite in the urine was again a6α-hydroxytrengestone. When trengestone was incubated with liver slices of male or female human subjects, two metabolites were detected, one of which was formed in large amounts. By comparison with the authentic compound, the major metabolite proved to be identical with (20S)-6-chloro-20-hydroxy-9β,10α-pregna-1,4,6-triene-3-one (20α-hydroxytrengestone). After oral administration of radioactive trengestone to man, the amount of total radioactivity in the urine was considerably greater in a human female (50 %) than in two human males (6–8 %). The main metabolite of trengestone was identified as 20α-hydroxytrengestone. When trengestone was given orally to a female rabbit, and to a female Rhesus monkey, both the 20α-hydroxy and the 2β-hydroxy derivatives of trengestone were detected in the urine. These experiments demonstrate considerable differences in the metabolism of the rat, rabbit, monkey, and man.

The identification of ethylene oxide as a major metabolite of ethylene in Vicia faba L

1978 ◽  
Vol 200 (1138) ◽  
pp. 87-94 ◽  
Keyword(s):  
Mass Spectrometry ◽  
Ethylene Oxide ◽  
Vicia Faba ◽  
Broad Bean ◽  
Major Metabolite ◽  
Vicia Faba L ◽  
Authentic Compound ◽  
Micro Organisms

Ethylene oxide has been positively identified as a metabolite of ethylene in developing cotyledons of broad bean by co-chromatography with the authentic compound and by mass spectrometry. In excess of 95% of applied [ 14 C]ethylene (3 μl/l) was metabolized in less than 2 h with 85-95% of the 14 C appearing in ethylene oxide. The metabolism is a property of the tissue and is not due to either micro-organisms or wounding.

scholarly journals 2-O-methyl-D-glucuronic acid, a new hexuronic acid of biological origin

1976 ◽  
Vol 155 (1) ◽  
pp. 181-185 ◽  
Author(s):  
J H Kieras ◽  
F J Kieras ◽  
D V Bowen
Keyword(s):  
Chemical Ionization ◽  
Glucuronic Acid ◽  
Extracellular Polysaccharide ◽  
Red Alga ◽  
British Library ◽  
Ionization Mass ◽  
Biological Origin ◽  
Hexuronic Acid ◽  
Authentic Compound ◽  
Hydrolysis Of

Acid hydrolysis of the extracellular polysaccharide of Porphyridium cruentum (a unicellular red alga) produced a mixture of aldobiuronic acids and free hexuronic acids. Fractionation of this mixture on an ion-exchange column yielded a hexuronic acid characterized as the title compound. Its identity was confirmed by chromatographic comparisons with the authentic compound, by reduction to the corresponding methylated aldose, by resistance to controlled lead tetra-acetate oxidation and by chemical-ionization mass spectrometry. Complete spectra have been deposited as Supplementary Publication SUP50062 (7 pages) with the British Library (Lending Division), Boston Spa, Wetherby, W. Yorkshire LS23 7BQ, U.K., from whom copies may be obtained under the terms given in Biochem. J. (1976) 153, 5.

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