Infrared-spectroscopic Studies on Bile Acids.
نویسندگان
چکیده
منابع مشابه
Studies on bile acids: The microquantitative separation of cellular bile acids by gas-liquid chromatography.
1. A method is described for the quantitative isolation of bile acids from cellular material. Homogenates of rat liver are freeze-dried and extracted exhaustively with 95% (v/v) ethanol containing 0.1% (v/v) of aq. ammonia (sp.gr. 0.88) and purified by anion-exchange chromatography on Amberlyst A-26. 2. The extracted bile acid conjugates are subjected to either of two hydrolytic procedures, one...
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New quaternary 3-phthalimidopropylammonium conjugates of steroids were obtained by reaction of sterols (ergosterol, cholesterol, cholestanol) and bile acids (lithocholic, deoxycholic, cholic) with bromoacetic acid bromide to give sterol 3β-bromoacetates and bile acid 3α-bromoacetates, respectively. These intermediates were subjected to nuclephilic substitution with N,N-dimethyl-3-phthalimidopro...
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Airaudo ChB, Gayte-Sorbier A, Aujoulat P and Mercier V (1988) Thin-layer chromatography of amine antioxidants and antiozonants used in elastomers. Journal of Chromatography 437: 59}82. FateH r Z, Tasi G, Szabady B and Nyiredy Sz (1998) IdentiRcation of amphetamine derivatives by uni-dimensional multiple development and two-dimensional HPTLC combined with postchromatographic derivatization. Jour...
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Infrared spectroscopic investigations have shown that on the basis of changes in the v3 , S0 4 band which occur when calcium sulphate is heated from 400° to 1400 °C, there are two forms of insoluble anhydrite, designated as ß'and /?-CaS04 . /?'-CaS04 is metastable and is completely converted into /?-CaS04 by heating above 1000 °C. With longer heating periods this conversion can even take place ...
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The mass spectra of several pyrazaboles of type 1 where R and'or R' = C2H5 have been studied. The loss of boron-bonded hydrocarbon moieties under electron impact is the predominant feature of all spectra. Some ultraviolet and nuclear magnetic resonance data on compounds of type 1 have been collected; bulky substituents were observed to lead to conformational isomers that can be detected by 13C ...
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ژورنال
عنوان ژورنال: Acta Chemica Scandinavica
سال: 1958
ISSN: 0904-213X
DOI: 10.3891/acta.chem.scand.12-1353b