Abstract
Gelatin was extracted from limed calf skin after a 30 sec. heat treatment with an urea solution in yield of a 40%, whereas gelatin was obtained merely in yields of 30_??_35% by the widely adopted hot water extraction method. The urea-extracted gelatin showed higher jelly strength and melting point, but was lower in ash content and exhibited lower relative vircosity. Animal feeding tests revealed that the urea-extracted gelatin was quite similar to the hot water-extracted one regarding the nutritional qualities, and it contained no disagreeable or acute toxic factor which might be produced during the course of the extraction.
