Abstract
THE pioneer work of Evans and his collaborators on the anti-sterility factor (vitamin E) has culminated in the isolation from the unsaponifiable fraction of wheat-germ1 and cotton-seed2 oils of three apparently isomeric oily alcohols α -, -β and -γtocopherol of approximate formula C29H50O2, all of which show high vitamin E activity. The use of the unsaponifiable fraction of rice-germ oil as a source of vitamin E was advocated by Kimm3, who later4 prepared from a purified concentrate a β-naphthoate, m.p. 156°, which yielded on hydrolysis a product alleged to have very high vitamin E activity.
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References
Evans, Emerson and Emerson, J. Biol. Chem., 113, 319 (1936).
Emerson, Emerson and Evans, Science, 83, 421 (1936).
Kimm, J. Agric. Chem. Soc. Jap., 11, 514 (1935).
Kimm, Sci. Pap. Inst. Phys. Chem. Res. Tokyo, 28, 74 (1935).
Karrer and Salomon, Helv. chim. Acta., 20, 424 (1937).
Fernholz, J. Amer. Chem. Soc., 59, 1154 (1937).
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TODD, A., BERGEL, F., WALDMANN, H. et al. Constituents of Vitamin E Concentrates from Rice-and Wheat-Germ Oils. Nature 140, 361–362 (1937). https://doi.org/10.1038/140361b0
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DOI: https://doi.org/10.1038/140361b0
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