Science, Volume 88, Issues 2270-2296John Michels (Journalist) 1938 |
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Page 38
... tocopherol prepared and purified as outlined ( the products were not chromato- graphed ) , agree fairly well with the theoretical values . The sample of a - tocopherol prepared from phytylbro- mide gave an allophanate which melted at ...
... tocopherol prepared and purified as outlined ( the products were not chromato- graphed ) , agree fairly well with the theoretical values . The sample of a - tocopherol prepared from phytylbro- mide gave an allophanate which melted at ...
Page 39
... tocopherol was not a simple mono - ethyl ether of duro- hydroquinone , but a cyclic ether , probably a chromane . Of the five simple cyclic substances shown in Table 1 all gave negative results.5 SYNTHETIC ALPHA TOCOPHEROL Karrer and co ...
... tocopherol was not a simple mono - ethyl ether of duro- hydroquinone , but a cyclic ether , probably a chromane . Of the five simple cyclic substances shown in Table 1 all gave negative results.5 SYNTHETIC ALPHA TOCOPHEROL Karrer and co ...
Page 40
... tocopherol with chromic anhydride in acetic acid solution , a lactone C21H4002 was ob- tained . The origin of such a lactone is easily ex- plicable on the theory that alpha tocopherol contains a chromane ring ; if alpha tocopherol ...
... tocopherol with chromic anhydride in acetic acid solution , a lactone C21H4002 was ob- tained . The origin of such a lactone is easily ex- plicable on the theory that alpha tocopherol contains a chromane ring ; if alpha tocopherol ...
Contents
CHAIKOFF | 1 |
CARR W H Raymond H Torrey 419 | 13 |
P British Association 404 | 15 |
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