Vitamin-B12Metabolism in Man Using Cobalt 58 (58Co) as a Tracer

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The urinary excretion of assayable vitamin B12 and radioactivity after parenteral 58Co B12 in man.

Evidence is presented that after injection of radioactive vitamin B(12) in man, there is a close correlation between the amount of radioactivity excreted and the amount of assayable vitamin B(12) excreted, and thus that the amount of radioactivity excreted is a true measure of the vitamin B(12) excreted. The possible reasons for this occurrence are discussed and it is suggested that in the body...

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residence times in a hypersaline creek: using salinity as a tracer

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ژورنال

عنوان ژورنال: Proceedings of the Royal Society of Medicine

سال: 1962

ISSN: 0035-9157

DOI: 10.1177/003591576205500212