EFFECT OF CHRONIC IRRADIATION OF ~(60)Co-γ-RAY AT LOW DOSE RATE ON RHESUS MONKEY——EFFECT ON PERIPHER

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The authors have demonstrated that after a long-term chronic irradiation of 2.17 rad/day for 2 months, the testis of the experimental monkey (Macaca mulatta) is extremelyatrophied with a loss of reproductive ability. But the effect on peripheral blood is notapparent even after irradiation for 57 months. It shou1d be noted that rhesus monkeys, being as sensitive to irradiation and similar inevolutionary steps as human beings, could be used as experimental animals to further studythe dose rate for aspermatogenesis, the morphological injuring effect on the reproductivesystem and the cytogenetic effect of irradiation, and this is highly important to working outa standard of promised dose of irradiation for X-ray workers and an index of radiationprotection monitoring. The authors have demonstrated that after a long-term chronic irradiation of 2.17 rad / day for 2 months, the testis of the experimental monkey (Macaca mulatta) is extremely atrophied with a loss of reproductive ability. But the effect on peripheral blood is notapparent even after irradiation for 57 months. It shou1d be noted that rhesus monkeys, being as sensitive to irradiation and similar inevolutionary steps as human beings, could be used as experimental animals to further study the dose rate for asmatogenesis, the morphological injuring effect on the reproductive system and the cytogenetic effect of irradiation, and this is highly important to working outa standard of promised dose of irradiation for X-ray workers and an index of radiationprotection monitoring.
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