Synthetic phylloquinone was resolved into cis and trans isomers by thin-layer chromatography. The two isomers had identical ultraviolet spectra characteristic of vitamin K$_{1}$ and were ...
The plant carotenoid biosynthetic pathway to cyclic carotenes proceeds via carotene precursors in cis configuration. Involvement of individual isomers was elucidated by genetic complementation of ...
IN the course of investigations on these films by a method differing only in details from that described by Langmuir (Journ. Amer. Chem. Soc., 1917, p. 1868) I have found striking differences between ...
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