ScienceJohn Michels (Journalist) 1951 |
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Page 289
... Vitamin A , is still uncertain ; but it also is known to be an alcohol , and retinene , is its alde- hyde ( 16 ) . To prepare retinene one need only pour a solution of vitamin A , or A , in petroleum ether onto a short column of dry ...
... Vitamin A , is still uncertain ; but it also is known to be an alcohol , and retinene , is its alde- hyde ( 16 ) . To prepare retinene one need only pour a solution of vitamin A , or A , in petroleum ether onto a short column of dry ...
Page 290
... vitamin A ,, and a comparable light- sensitive pigment from vitamin A ,; for our retinenes were prepared from the corresponding vitamins A by oxidation on manganese dioxide . This was an un- physiological process ; but its success led ...
... vitamin A ,, and a comparable light- sensitive pigment from vitamin A ,; for our retinenes were prepared from the corresponding vitamins A by oxidation on manganese dioxide . This was an un- physiological process ; but its success led ...
Page 626
... vitamin B12 . The term " unprotected " indicates that the medium is not protected with reductants ( Table 1 ) . TABLE 1 Units / ug Sample A * Bt Thiocyanate analog 2,300 6,200 Vitamin B120 1,800 6,800 Vitamin B12 11,000 11,000 * L ...
... vitamin B12 . The term " unprotected " indicates that the medium is not protected with reductants ( Table 1 ) . TABLE 1 Units / ug Sample A * Bt Thiocyanate analog 2,300 6,200 Vitamin B120 1,800 6,800 Vitamin B12 11,000 11,000 * L ...
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AAAS Academy acid activity alkaline phosphatase American amino amino acids animals annual application ascorbic acid Association atomic Bentley Glass Biol biological biophysicist biophysics blood cells Chem chemical Chemistry Chicago College compounds cortisone cultures Department deuterium director disease effect electron endothelium energy engineering enzyme experimental experiments fibroblasts field genetics Geological hyaluronidase hydrogen Ibid increase indicate industrial injection Institute investigation Laboratory liver material measurements mechanics Medical Medicine meeting ment metal method mitochondria National nature nuclear observed obtained opsin organization paper particles physics Planck plants pollen zone present president pressure problems production professor protein quantum radiation rats reaction References reported retinene rhodopsin samples School scientific scientists Section Society sodium solution species succinic dehydrogenase temperature theory tion tissue tobacco mosaic virus University virus vitamin vitamin B12 Washington York