Abstract
IN 1941 Boer and Jansen showed1 that summer-butter contains a growth-promoting factor that was neither vitamin A nor one of the other known fat-soluble vitamins. Later, Boer and Jansen demonstrated that the growth-promoting action was due to the saponifiable fraction of the summer-butter We have now divided the saponifiable fraction by fractional distillation. The different fatty acids obtained in this way were administered to rats, and the growth of the rats on the different fractions was compared. Details of the technique of this test are given in our earlier publications. In a fuller publication, that will appear elsewhere, the method of distillation also will be described.
Similar content being viewed by others
Article PDF
References
Arch. Néerl. Physiol., 26 (1942).
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
BOER, J., JANSEN, B. & KENTIE, A. Isolation of the Growth-Promoting Factor Present in the Fatty Acids of Summer-Butter. Nature 158, 201 (1946). https://doi.org/10.1038/158201a0
Issue Date:
DOI: https://doi.org/10.1038/158201a0
Comments
By submitting a comment you agree to abide by our Terms and Community Guidelines. If you find something abusive or that does not comply with our terms or guidelines please flag it as inappropriate.