RADIOSENSITIVITY

Journal Article · Wed Jan 01 04:00:00 EST 1958 · Genen en Phaenen

OSTI ID:4221987

Oster, I I

The condensed state of the chromosomes of many organisms is the most sensitive to x rays. A comparison of the radiosensitivity of Drosophila melanogaster spermatids and spermatozoa, both having condensed chromosomes, indicated that some other factor(s) is responsible. in part at least, for the greater sensitivity of the former cells. X irradiation of mature sperm and spermatids in either nitrogen, air, or oxygen which indicated a relatively greater effect of reducing the oxygen tension and a relatively lesser effect of increasing the oxygen tension from that present in air on the radiosensitivity of spermatids as compared to spermatozoa lends support to the suggestion that the high sensitivity of spermatids may at least in part be due to more intra- and/or inter-cellular oxygen being normally present (or available) in these cells. It would be of interest to determine whether such a mechanism can account for the variations noted in the radiosensitivity of other chromosomes havlng otherwise similar morphological properties. (auth)

• Research Organization: Indiana Univ., Bloomington
• NSA Number: NSA-14-000047
• OSTI ID: 4221987
• Journal Information: Genen en Phaenen, Journal Name: Genen en Phaenen Vol. Vol: 3
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

AIR
ANIMAL CELLS
BIOLOGY AND MEDICINE
CHROMOSOMES
DROSOPHILA
DROSOPHILA MELANOGASTER
GONADS
INSECTS
NITROGEN
OXYGEN
QUANTITY RATIO
RADIATION EFFECTS
RADIOSENSITIVITY
SPERM
VARIATIONS
X RADIATION