Abstract
(Received 8th January 1970, revised 1st April 1970) Summary. Immersion of the scrotal rat testis in water at 42° C for 30 min produces dye chromophilia within 1 hr (eosin or alcian blue) in pachytene and diplotene primary spermatocytes. Within 2 hr, changes in acid phosphatase and amino-peptidase reactions occur. Chromatin is lost and only cytoplasmic remnants remain after 30 hr. More severe damage (43° C for 1 hr) increases the amounts of free acid phosphatase and proteinase in the testis.
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