FINAL REPORT FOR CONTRACT NOONR-534 (UNION COLLEGE, SCHENECTADY, NY)
UNION COLL SCHENECTADY NY
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Comparison of high and low voltage-rays No wave-length effect was demonstrated when either 124-kv, 2-Mev, or 50-Mev x-rays were similarly distributed through various test organisms. No effect of neutron production on cataract formation was exhibited by 50-Mev x-rays. Induced radioactive O, N, and C, unless exhibiting unique biological effects, was considered an insignificant part of the total radiation 0.005 in 3050 r. A marked difference in survival times was shown by a comparison of 124-kv or 200-kv and 50-Mev x-rays. Radiation genetics of the parasitic wasp X-ray 200 kv-induced recessive lethals in first meiotic metaphase eggs were studied. For those eggs treated with 500 r LD sub-60 dose, the rate was about 5 as compared to 7 for prophase eggs treated with 12,000 r LD sub-50 dose. It appeared that recessive lethal rates can be secured for 3 gametic stages. Biochemical activities of x-ray induced yeast mutations Studies were initiated on mutant 46 Y, which is unable to utilize atmospheric O, to determine the character of the physiological block. Dyes ranging from Eo pH 7.0 0.06 to -0.3 and tripeptide glutathione were employed to test the hypothesis that O utilization might be restored by a substitute redox system inconclusive results appeared to indicate that such a system may act to bridge the gap between 1 enzyme system and another.
- Medicine and Medical Research