title: The 1st George Porter memorial lecture, 13 November 1981. Life without microbes.
mesh_terms: D000818:Animals; D002432:Cecum / Q000002:abnormalities; D004064:Digestive System / Q000378:metabolism / Q000382:microbiology; D005856:Germ-Free Life; D049672:History, 19th Century; D049673:History, 20th Century; D014815:Vitamins / Q000378:metabolism
chemical_list: D014815:Vitamins