, Volume 33, Issue 8, pp 360-363

Urease activity in soybean meal products

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A method which uses direct titration of ammonia as a measure of urease activity was modified for use in the assay of raw and of slightly denatured soybean meal. The modifications which were adopted were the use of glutathione, a presoaking of the sample for 30 min. at 40°C., and making of the assay at 40°C. Data on the urease activity of several varieties of soybeans, and for immature and frost-damaged soybeans were determined.

Presented at the meeting of The American Oil Chemists’ Society, Houston, Tex., Apr. 23–25, 1956.
In military service.
One of the Branches of the Agricultural Research Service, U. S. Department of Agriculture.