STIMULATING EFFECT OF LOW DOSE ^147Pm ON DNA REPAIR IN SPERMIOGENIC STAGES

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For labelling spermatid DNA,male BALB/c mice are injected intratesticularyly with 3H-TdR in advance.After 36d of labelling,spermatozoa are sampled which is just the time required for the germ cells to mature.The period from intraperitoneal injection of ^1
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