אסיף מאגר המחקר החקלאי

Separation of 24- and 25-dehydrocholesterols; and the impure state of commercial desmosterol preparations.

Year:

1967

Source of publication :

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Volume :

8

Co-Authors:

Svoboda, J.A., Insect Physiology Laboratory, Entomology Research Division, Agricultural Research Service, US Department of Agriculture, Beltsville, Maryland 20705, USA.
Thompson, M.J., Insect Physiology Laboratory, Entomology Research Division, Agricultural Research Service, US Department of Agriculture, Beltsville, Maryland 20705, USA.

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Abstract:

Chromatographic methods for the separation of 24- and 25-dehydrocholesterols are described. The purities of three commercial samples of 24-dehydrocholesterol examined by thin-layer and gas-liquid chromatography were only 42, 79, and 80%, respectively; a commercial sample of radioactive 24-dehydrocholesterol was shown to contain 40% 25-dehydrocholesterol.

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