title: Discrimination of isotopes by living systems. 3. The effect of heavy water on the motility and lifetime of sperms.
mesh_terms: D000818:Animals; D001001:Anura; D002465:Cell Movement / Q000187:drug effects; D003903:Deuterium; D006859:Hydrogen / Q000494:pharmacology*; D008297:Male; D013094:Spermatozoa / Q000187:drug effects*
chemical_list: D006859:Hydrogen; D003903:Deuterium