title: Nucleolar activity of rat primary spermatocytes.
mesh_terms: D000818:Animals; D001345:Autoradiography; D002466:Cell Nucleolus / Q000378:metabolism*; D008297:Male; D008854:Microscopy, Electron; D012335:RNA, Ribosomal / Q000096:biosynthesis*; D051381:Rats; D013094:Spermatozoa / Q000166:cytology / Q000378:metabolism*; D013997:Time Factors; D014316:Tritium; D014529:Uridine / Q000378:metabolism*
chemical_list: D012335:RNA, Ribosomal; D014316:Tritium; D014529:Uridine