This volume covers topics such as: The molecular genetics of cultivated mushrooms; the molecular genetics of cultivated mushrooms; the intestinal microflora: potentially fertile ground for microbial physiologists; primary metabolism and its control in Streptomycetes: a most unusual group of bacteria; and acid adaptation in oral Stretococci. It covers recent advances in microscopical techniques. It is applicable to researchers in microscope instrumentation and to users in a range of disciplines, including biology, materials research and development, non-destructive testing, and the electronics service industry.