The Journal of General Physiology
Avanti Polar Lipids
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The Journal of General Physiology, Vol 17, 303-309, Copyright © 1933 by The Rockefeller University Press

ARTICLE

THE CONVERSION OF FAT TO CARBOHYDRATE IN THE GERMINATING CASTOR BEAN

II. THE COMBUSTION RESPIRATORY QUOTIENT AS DETERMINED BY A MODIFIED OXYCALORIMETER



Ray G. Daggs 1 and H. S. Halcro-Wardlaw 1

1 From the Department of Vital Economics, University of Rochester, Rochester, N. Y.

The combustion respiratory quotients of castor beans germinated to various stages, depending upon the length of the hypocotyl, were determined by means of a modified oxycalorimeter.

After germination was well started, the respiratory quotient of the combusted germinated seed increased as the stage of germination increased, indicating a change from an oxygen-poor to an oxygen-rich substance, probably fat to sugar.

The accuracy of the method was checked by organic combustions.

The seat of formation of the oxygen-rich substance is in the endosperm.

Accepted on August 1, 1933


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