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pro vyhledávání: '"William R. Nes"'
Autor:
Noel J. de Souza, William R. Nes
Publikováno v:
Journal of Lipid Research, Vol 10, Iss 2, Pp 240-243 (1969)
Some closely related sterols have been separated with better resolution in a shorter period of time than has previously been reported. Separations were effected on the basis of carbon number and the number and location of double bonds through the use
Externí odkaz:
https://doaj.org/article/22ff7fed857441c7b4178fb259acb843
Autor:
William R. Nes
A turning point seems to have been reached recently in our understanding of biological systems. After about 1930, when it became possible to examine the dynamic aspects of a cell seriously and to increase the breadth of our knowledge of the chemicals
Publikováno v:
Phytochemistry. 29:3427-3434
The sterol compositions of roots, leaves, stems, flowers and vegetatively cloned plantlets of Kalanchoe daigremontiana were examined by TLC, GLC, HPLC, mass and 1H NMR spectroscopy. Fourteen Δ5-sterols were identified. They were cholesterol, 24(28)-
Publikováno v:
Journal of Biological Chemistry. 253:6218-6225
As an approach to the study of the relationship between the structure of sterols and their capacity to function in the lipid leaflet of membranes, various sterols were examined for their ability to support the growth of anaerobic Saccharomyces cerevi
Autor:
William R. Nes, John E. Zarembo
Publikováno v:
Journal of Natural Products. 44:7-13
Autor:
Karla S. Ritter, William R. Nes
Publikováno v:
Journal of Insect Physiology. 27:419-424
Heliothis zea was reared on artificial diets which lacked supplementation with plant materials but were supplemented with different sterols in order to determine how certain structural features of a sterol molecule affect the development of this inse
Autor:
Vipin K. Garg, William R. Nes
Publikováno v:
Phytochemistry. 23:2925-2929
A substantial amount ( ca 18%) of the sterol found in the seeds of Cucurbita maxima had a Δ-bond and consisted of seven components. They were identified as 25(27)-dehydroporiferasterol, clerosterol, isofucosterol, stigmasterol, sitosterol, campester
Autor:
Vipin K. Garg, William R. Nes
Publikováno v:
Phytochemistry. 23:2919-2923
Uncertainties surrounding the structures of the Δ 7 -sterols in the seeds of Cucurbita maxima have been resolved. Seven components were found by TLC, GLC, HPLC, mass spectrometry and 1 H NMR. They were 24β-ethyl-5α-cholesta-7,22,25(27)-trien-3β-o
Publikováno v:
Journal of Biological Chemistry. 253:2361-2367
tives; however, the organism did not significantly metabo- lize the “left-handed” (Z)-17(20)-dehydrocholesterol in which C-22 is c&-oriented with respect to C-13. We interpret this to imply a stereochemical requirement for a right- handed side ch
Autor:
Katherine A. Erickson, William R. Nes
Publikováno v:
Proceedings of the National Academy of Sciences. 79:4873-4877
Mice were fed cholesterol or various other sterols for 26 hr, after which the amount of hepatic cholesterol synthesis was measured in a cell-free system. The following sterols were as effective as cholesterol itself in depressing the conversion of ac