Abstract
ALTHOUGH œstriol, œstrone and œstradiol have been detected in mixed avian excreta1 and in extracts of ovaries of laying hens2 by chromatographic methods, it would appear that only œstradiol-17β has been isolated hitherto from avian material in crystalline form and identified by infra-red spectrophotometry3. We have now secured similar evidence for the presence of œstrone in avian urine.
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AINSWORTH, L., COMMON, R. Crystalline Œstrone isolated from Urine of the Laying Hen. Nature 195, 77 (1962). https://doi.org/10.1038/195077a0
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DOI: https://doi.org/10.1038/195077a0
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