Abstract
AbstractThe effect of thermally irradiated gelatin at various pH's on the ultra-violet absorption at 257nm, the molecular weight and the amount of thermally coagulated material has been studied.Decrease in pH of thermal irradiation leads to molecular weight decreases and ultra-violet absorption increases. The ultra-violet absorption correlates with the molecular weight of the thermally irradiated gelatin. At pH 3-4, however, irradiation leads to a very high ultra-violet absorption which is outside the regression line. The level of thermally coagulated material also increased in this pH range. It would seem that the ultra-violet absorption increase at pH 3-4 is related to the thermal coagulation reaction.
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