ASSIMILATION AND BIOLOGICAL TURNOVER OF CESIUM-134 IODINE-131 AND CHROMIUM-51 IN BROWN CRICKETS ACHETA DOMESTICUS (L)

被引:21
作者
VANHOOK, RI
CROSSLEY, DA
机构
[1] Radiation Ecology Section, Health Physics Division, Oak Ridge National Laboratory, Oak Ridge, TN
[2] Department of Entomology, University of Georgia, Athens
来源
HEALTH PHYSICS | 1969年 / 16卷 / 04期
关键词
D O I
10.1097/00004032-196904000-00006
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Understanding of radionuclide accumulation by insects requires careful assessment of assimilation and turnover rates. In separate experiments, three radionuclides (134Cs, 131I or 51Cr) were fed to adult brown crickets for a 24-hr period. The insects were then transferred to nonradioactive food and their whole-body retention measured at 1-hr intervals. The retention of each radionuclide can be described by a sum of two exponential functions, a shorter one related to loss of unassimilated radionuclide from the gut and a longer one describing excretion of assimilated radionuclide from tissues. The shorter components had similar rates (half time = about 4 hr) for all three radionuclides, indicating that they were a measure of gut clearance time. Chromium had the lowest assimilation (6%) and cesium the highest (65%). Assimilated 134Cs and 51Cr were eliminated at moderate rates (biological half lives of 62 and 83 hr, respectively) but assimilated 131I was stored rather than excreted. © 1969 Health Physics Society.
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页码:463 / +
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