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Sublimed D-,L-,and DL-leucine under vacuum were subjected to ~(60)Co γ-irradiation withdifferent doses.The enantiomeric compositions of samples were determined by chirasil-val capillary column gas chromatography,and the relative yields of radiolytic products(H_2,CO_2 and NH_3)were measured by packed column gas chromatography.The obtained datashowed the peak area ratios D/L of DL-leucine after different absorbed doses of irradiationare all the same as that of samples with no irradiation,within the limit of error.So are theratios for the separately irradiated D-and L-leuicne.This suggests that no asymmetric decom-position was found.The relative yields D/L of radiolytic products(H_2,CO_2 and NH_3)arevery close to 1.00,indicating that the D-leucine cleavage rate was the same with that of theL-leucine.From the view of dissipative structure,an explanation for the result was presented.
Sublimed D-, L-, and DL-leucine under vacuum were (60) Co γ-irradiation with different doses. The enantiomeric compositions of samples were determined by chirasil-val capillary column gas chromatography, and the relative yields of radiolytic products (H_2, CO_2 and NH_3) were measured by packed column gas chromatography. The obtained datashowed the peak area ratios D / L of DL-leucine after different absorbed doses of irradiation were all the same as that of samples with no irradiation, within the limit of error.So are theratios for the exclusively irradiated D-and L-leuicne.This suggests that no asymmetric decom-position was found. The relative yields D / L of radiolytic products (H_2, CO_2 and NH_3) arevery close to 1.00, indicating that the D-leucine cleavage rate was the same with that of the L-leucine. From the view of dissipative structure, an explanation for the result was presented.