Results 181 to 190 of about 48,364 (235)

Brassicasterol and 22,23-dihydrobrassicasterol from ergosterol via i-ergosterol

Steroids, 1965
Abstract Since the method most commonly employed for the preparation of brassicasterol gave brassicasterol acetate in an overall 4% to 5% yield, an alternate method for the preparation of gram quantities of brassicasterol and 22,23-dihydrobrassicasterol was investigated.
M J, THOMPSON, C F, COHEN, S M, LANCASTER   +2 more
openaire   +2 more sources

IRRADIATED ERGOSTEROL POISONING

JAMA: The Journal of the American Medical Association, 1942
To the Editor:— Your issue of May 16 has reached me somewhat belatedly, for reasons that need not be elaborated. I note therein a report by Tumulty and Howard on 2 cases of irradiated ergosterol poisoning. It is made quite clear in the text of the paper that the patients were fed mixtures of calciferol, lumisterol, tachysterol and toxisterol, and I ...
PHILIP A. TUMULTY, JOHN EAGER HOWARD
  +4 more sources

Ergosterol Photoisomerization Reaction Scheme

Journal of Pharmaceutical Sciences, 1973
The kinetics of the various isomers formed at low temperature by UV irradiation of ergosterol were studied experimentally at the wavelength λ = 253.7 nm. The characteristics of the photostationary state were used to determine the isomer precursor of the toxisterols as well as the quantum transformation yields of one isomer into another.
R, Mermet-Bouvier, E, Abillon
openaire   +2 more sources

VIOSTEROL (IRRADIATED ERGOSTEROL)

Journal of the American Medical Association, 1930
The introduction of irradiated ergosterol as a new source of vitamin has brought with it numerous problems for consideration. Animal experimentation has established the fact that irradiated ergosterol will prevent and cure rickets if it is given in sufficient quantity and that toxic effects are produced in massive doses.
JULIUS H. HESS, HENRY G. PONCHER, MAURICE L. DALE, REUBEN I. KLEIN   +3 more
openaire   +1 more source

Enhanced fluorescence of ergosterol by iodination and determination of ergosterol by fluorodensitometry

The Analyst, 1988
A rapid, highly sensitive and specific method for the determination of ergosterol in food grains contaminated with fungi is described. The method involves simple iodination of ergosterol resulting in the formation of a highly fluorescent product which is determined fluorodensitometrically.
R B, Sashidhar, R V, Sudershan, Y, Ramakrishna, S, Nahdi, R V, Bhat   +4 more
openaire   +2 more sources

Fluorescence properties of ergosterol

Journal of Photochemistry, 1985
Abstract Ergosterol is fluorescent in low temperature matrices as are several molecules with a 1,3-diene structure. The fluorescence lifetime of 3.3 ns and the fluorescence quantum yield of 0.19 have been obtained in a methyl-cyclohexane-isopentane matrix at 77 K.
Nobuaki Nakashima, Stephen R. Meech, Andrew R. Auty, Anita C. Jones, David Phillips   +4 more
openaire   +1 more source

Cytotoxic ergosterols frompaecilomyces sp. J300

Archives of Pharmacal Research, 2002
Seven ergosterol derivatives (1-7) were isolated from silkworm larvae infected with Paecilomyces sp. J300. On the basis of spectroscopic means, their structures have been elucidated as 3beta,5alpha-dihydroxy-ergosta-7,22-diene (1), 5alpha,6alpha-epoxy-(22E,24R)-ergosta-8(14), 22-diene-3beta, 7alpha-diol (2), 5alpha,6alpha-epoxy-(22E,24R)-ergosta-8,22 ...
Hak Cheol, Kwon, Sang Deuk, Zee, Sae Yun, Cho, Sang Un, Choi, Kang Ro, Lee   +4 more
openaire   +2 more sources

IRRADIATED ERGOSTEROL

BMJ, 1930
H. Jephcott, A. L. Bacharach
  +4 more sources