ISSN:
1432-2099
Source:
Springer Online Journal Archives 1860-2000
Topics:
Biology
,
Physics
Notes:
Summary Mouse immature oocytes were irradiated in vivo with highly charged, heavy ions from the Bevalac accelerator at the Lawrence Berkeley Laboratory. The particles used were 670-MeV/nucleon Si14+, 570-MeV/nucleon Ar18+, and 450-MeV/nucleon Fe26+. The cross-sectional area of the lethality target in these extremely radiosensitive cells was determined from fluence-response curves and information on energy deposition by delta rays. Results indicate a target cross-section larger than that of the nucleus, one which closely approximates the cross-sectional area of the entire oocyte. For 450-MeV/nucleon Fe26+ particles, the predicted target cross-sectional area is 120 ± 16 µm2, comparing well with the microscopically determined cross-sectional area of 111 ± 12µm2 for these cells. The present results are in agreement with our previous target studies which implicate the oocyte plasma membrane.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF01210297
