Abstract
THE second International Conference on Vitamin JL Standardisation provisionally fixed 1,600 as the value for the factor relating the results of spectro-photometric tests of vitamin A with the results of biological tests, expressed in international units.
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References
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HUME, E. ESTIMATION OF VITAMIN A. Nature 151, 535–536 (1943). https://doi.org/10.1038/151535a0
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DOI: https://doi.org/10.1038/151535a0