The marked effects of nutrition on the glucose metabolism of Bacilus subtilis, Marburg strain, have been demonstrated (Gary and Bard, 1952a). The results revealed that growth in a tryptoneyeast extract-glucose medium yields cells capable of vigorous respiration and fermentation, whereas cells grown in an inorganic nitrogen-alts-glucose medium exhibit respiratory activity with practically no fermentative capacity. These differences in biochemical activity and the nature of the 1 This study was supported by the Office of
Little information has been contributed to the mechanisms of biological degradation of polycyclic hydrocarbons. The oxidation of naphthalene has received the most attention. Strawinski and Stone (1943, 1954) reported the isolation of substantial amounts of salicylic acid ("most" of the 2.9 mg per ml medium of ether extractable product) from the breakdown of naphthalene by Pseudomonas aeruginosa. Salicylic acid has been verified as an intermediate in naphthalene oxidation by Treccani (1953), Walker and Wiltshire (1953), and Murphy and Stone (1955). These latter systems were not entirely satisfactory for intermediary studies. Either the intermediate compound (salicylate) was recovered in small amounts; i.e., 23 mg from 2 L culture medium (Walker and Wiltshire, 1953), 0.6 mg per ml medium (Murphy
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