ScienceJohn Michels (Journalist) 1952 |
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Стр. 120
... vitamin B12 and B12b in high - potency concentrates , but was soon found to be unreliable for relatively crude ... Vitamin B12b isolated from fermentation sources ( 1 ) was used in early studies of the reaction with vitamin C ...
... vitamin B12 and B12b in high - potency concentrates , but was soon found to be unreliable for relatively crude ... Vitamin B12b isolated from fermentation sources ( 1 ) was used in early studies of the reaction with vitamin C ...
Стр. 121
... vitamin B12 was dissolved in 5 ml water . The pH was made to 3.5 with dilute HCl , and the solution was irradiated 4 hr . Conversion from the cyano form was spectrophotometrically complete . To this solution was added 100 mg of the ...
... vitamin B12 was dissolved in 5 ml water . The pH was made to 3.5 with dilute HCl , and the solution was irradiated 4 hr . Conversion from the cyano form was spectrophotometrically complete . To this solution was added 100 mg of the ...
Стр. 334
... VITAMINS For Research Carotene , 90 % Beta - 10 % Alpha Carotene , Alpha Carotene , Beta Vitamin A Alcohol Vitamin A Acetate , Synthetic Vitamin A Palmitate , Synthetic Vitamin B12 Crystalline Vitamin B12 ( Sal . Sol . ) Vitamin B12 - ...
... VITAMINS For Research Carotene , 90 % Beta - 10 % Alpha Carotene , Alpha Carotene , Beta Vitamin A Alcohol Vitamin A Acetate , Synthetic Vitamin A Palmitate , Synthetic Vitamin B12 Crystalline Vitamin B12 ( Sal . Sol . ) Vitamin B12 - ...
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News and Notes | 6 |
Technical Papers | 12 |
Comments and Communications | 19 |
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