435 / | HD | CHEMISTRY: MOLECULAR BIOLOGY AND MICROBIOLOGY |
41 | DF | MICRO-ORGANISM, TISSUE CELL CULTURE OR ENZYME USING PROCESS TO SYNTHESIZE A DESIRED CHEMICAL COMPOUND OR COMPOSITION {26} |
132 | DF | .~ Preparing oxygen-containing organic compound {6} |
136 | DF | .~.~ Containing a carboxyl group {6} |
139 | .~.~.~ Lactic acid |