GAMMA RADIOLYSIS OF CYSTINE IN AQUEOUS SOLUTION. DOSE-RATE EFFECTS AND A PROPOSED MECHANISM

Authors
  1. Purdie, J.W.
Corporate Authors
Defence Chemical Biological and Radiation Labs, Ottawa ONT (CAN)
Abstract
Solutions of L-cystine (CySSCy) in water (3 x E-4 M) were exposed to 10,000 rads of Co60 Gamma rays. G values were determined for the following products: CySO2H, CyS03H, CySO2SH, CySSO3H,CySH and CySSSCy. The effect of OH and e sub aq (-) scavengers on the yields was also investigated. The yields of CySO2H, CySO3H, and CySH were dose-rate dependent in the range 1 to 800 rads/min. A mechanism for the radiolysis is presented and discussed: CySOH appears to be the main precursor of both CySO2H and CySO3H with O2 (-) participating in formation of the latter. CySSSCY, the yield of which was independent of dose rate, is probably produced from cystine by reaction wih CyS radicals.
Report Number
DCBRL-508 — Reprint; Previously Catalogued as DSIS 67-03637
Date of publication
15 Jan 1967
Number of Pages
6
Reprinted from
Journal of the American Chemical Society, vol 89, no 2, 1967, p 226-230
DSTKIM No
89-01269
CANDIS No
59201
Format(s):
Hardcopy;Originator's fiche received by DSIS

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