J.W. Bennett, P.-K. Chang, and D. Bhatnagar, One Gene to Whole Pathway: The Role of Norsolorinic Acid in Aflatoxin Research; P.F. Fox, Flavour Compounds in Cheese; D.K. OToole, The Role of Micro Organisms in Soy Sauce Production; X. Yin and G. Stotzky, Gene Transfer Among Bacteria in Natural Environments; K.H. Nealson and B. Little, Breathing Manganese and Iron: Solid State Respiration; O.P. Ward, Microbial Production of Docosahexaenoic Acid (DHA, C22:6); P. Bajpai, Enzymatic Deinking; Subject Index.