title: Stability of lyophilized S-9 preparations.
mesh_terms: D000818:Animals; D002498:Centrifugation; D004355:Drug Stability; D005612:Freeze Drying; D005615:Freezing; D008099:Liver / Q000201:enzymology*; D008297:Male; D006899:Mixed Function Oxygenases / Q000378:metabolism*; D009152:Mutagenicity Tests; D010089:Oxidoreductases, N-Demethylating / Q000378:metabolism*; D051381:Rats; D011919:Rats, Inbred Strains; D012486:Salmonella typhimurium / Q000235:genetics
chemical_list: D006899:Mixed Function Oxygenases; D010089:Oxidoreductases, N-Demethylating