Note to users. If you're seeing this message, it means that your browser cannot find this page's style/presentation instructions -- or possibly that you are using a browser that does not support current Web standards. Find out more about why this message is appearing, and what you can do to make your experience of our site the best it can be.

Science 28 February 1964:
Vol. 143. no. 3609, pp. 954 - 955
DOI: 10.1126/science.143.3609.954
Prev | Table of Contents | Next

Articles

Conversion of Leucoanthocyanins into the Corresponding Anthocyanidins

M. A. Joslyn 1 and J. L. Goldstein 1

1 Department of Nutritional Sciences, University of California, Berkeley

Purified preparations of leucoanthocyanins from several sources were heated in butanol-hydrochloric acid solutions from 50° to 90°C and the rate of production of cyanidin was measured. From the temperature dependence of this rate, the calculated energy of activation was of the order of magnitude of 20,000 calories. The rate-limiting step in this reaction was similar for two preparations tested, and of lower energy for a third, presumably of lower degree of polymerization.

To Advertise     Find Products

Science. ISSN 0036-8075 (print), 1095-9203 (online)