Corrosion is a problem that has plagued man ever since he turned to the use of metals; corrosion is defined as the destructive alteration of a metal by reaction with its environment. Corrosion, viewed in a broad sense, has two main causes; these are: 1. Chemical-a direct cause. In this instance, an attack occurs on refined metals by acids, chemical fumes, moisture, and air. 2. Biological-an ind...

Acetate (1 to 10 mm) had no effect on the rate of nitrite oxidation or exponential growth by Nitrobacter agilis. However, acetate-1-(14)C and -2-(14)C were both assimilated by growing cultures, and acetate carbon contributed 33 to 39% of newly synthesized cell carbon. Carbon from acetate was incorporated into all of the major cell constituents, including most of the amino acids of cell protein ...

The energy thus liberated is used in part for the assimilation of carbon dioxide which serves as the sole carbon source for growth. Studies of the biochemistry of Nitrobacter agilis have been mainly limited by the difficulty in obtaining large yields of cells, as has been the case with many of the chemoautotrophs. There has consequently been a relat.ively slow advancement of biochemical researc...

The nitrite oxidizing Alphaproteobacterium, Nitrobacter winogradskyi, primarily conserves energy from the oxidation of nitrite (NO(2)(-))to nitrate (NO(3)(-)) through aerobic respiration. Almost 20 years ago, NO-dependent NADH formation was reported to occur in both aerobic and anaerobic cell suspensions of N. winogradskyi strain 'agilis', suggesting that NO oxidation might contribute to energy...