Carbon compounds microorganism effects

The loss of carbon compounds from roots can influence microbial populations in various ways. Since the presence of readily available carbon sources is thought to be the most limiting factor to microbial growth in soil (96), rhizodeposition acts at a gross level to stimulate microbial populations. This generates the rhizo-sphere effect (97), where the number of microorganisms in the rhizosphere (R)... 

Invert soaps are widely used in hospitals, but for their bactericidal properties rather than their cleansing properties. They are active against bacteria, fungi, and protozoans, but they are not effective against spore-forming microorganisms. One type of invert soap is the family of benzalkonium chlorides. The alkyl groups of these compounds contain from 8 to 16 carbon atoms. These compounds are effective at concentrations of 1 750 to 1 20,000. The more complex benzethonium chloride is also an effective antiseptic. 

Triazines pose rather more of a problem, probably because the carbons are in an effectively oxidized state so that no metaboHc energy is obtained by their metaboHsm. Very few pure cultures of microorganisms are able to degrade triazines such as Atrazine, although some Pseudomonads are able to use the compound as sole source of nitrogen in the presence of citrate or other simple carbon substrates. The initial reactions seem to be the removal of the ethyl or isopropyl substituents on the ring (41), followed by complete mineralization of the triazine ring. 

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