Using a sensitive photo electric spectrophotometer, carotene derived from carrots and dissolved in an oil, has been found to exhibit an absorption band in the region 325-330 Mμ. An absorption band in this region has been shown by Morton & Heilbron to be characteristic of vitamin A in fats derived from animal sources. The appearance of this band in carotene from a vegetable source, establishes an even closer relationship between these two growth-promoting factors.
Proceedings of the Iowa Academy of Science
©1931 Iowa Academy of Science, Inc.
Woodrow, Jay W. and Philipson, J. B.
"Ultra Violet Absorption Spectra of Carotene and Vitamin A,"
Proceedings of the Iowa Academy of Science, 38(1), 218-218.
Available at: https://scholarworks.uni.edu/pias/vol38/iss1/67