LOW-TEMPERATURE THERMO LUMINESCENCE OF THE GAMMA-IRRADIATED AMINO ACIDS AND PROTEINS

摘要

Radiation-induced thermoluminescence has "been studied for four proteins and twenty-three L-amino acid preparations. The powdered crystalline samples were irradiated at liquid-nitrogen temperature and subsequently warmed to room temperature. Glow curves plots of intensity of light emission versus temperature - are presented for these preparations. From considerations of the intensities of peaks in the glow curves and the temperatures at which they occur, four conclusions are drawn:(l) The glow curves from proteins are not the sum of the glow curves of the constituent amino acids (properly weighted for per cent content) in their isolated crystalline form;(2) Chemical composition exerts the greatest influence on the thermoluminescence from amino acids;(3) The crystalline system to which an amino acid belongs seems to play only a minor or negligible role in determining the nature of the glow curves;and (4) Small changes in the level of purity may exert a relatively strong influence on the thermoluminescence from some amino acids.