Microbial involvement

Microbial Involvement through Enrichment Culturing Techniques...175... 

Microbial Transformation of Organic Chemicals in Natural Environments Fate of Chemicals and Substantiation of Microbial Involvement through Enrichment Culturing Techniques... 

Redox gradients as strong as those observed at the ring edges are potential sources of energy for autotrophic bacteria. Evidence for microbial involvement includes H2S consumption, S042 ... 

Duhig, N. C., Davidson, G. J. Stolz, J. (1992). Microbial involvement in the formation of Cambrian sea-floor silica iron-oxide deposits, Australia. Geology, 20, 511-14. Edwards, J., Chamberlain, D., Brosnan, G. et al. (1998). A comparative physiological... 

Since most major manganese deposits are of sedimentary origin, it is relevant to consider aspects of microbial transformations of manganese in freshwater and marine systems, including the conditions necessary for microbial involvement in the formation of extensive sedimentary manganese deposits. 

The evidence from field studies is somewhat contrary to the predictions based on equilibrium chemistry. Abiological precipitation of CaC03 seems to be very limited, restricted to geographically and geochemically unusual conditions. The reasons why carbonate minerals are reluctant to precipitate from surface seawater are still poorly understood, but probably include inhibiting effects of other dissolved ions and compounds. Even where abiological precipitation is suspected—for example, the famous ooid shoals and whitings of the Bahamas (Box 6.5)—it is often difficult to discount the effects of microbial involvement in the precipitation process. 

The only published information on a microbial involvement in the production of this compound is in a 2005 PCT International Application filed by Hill etal claiming production of Kahalalide F and other derivatives from a Vibrio species isolated from Bryopsis and also E. rufesens, implying that the invertebrate obtains the producing microbe from the alga and then maintains the microbe(s) as symbionts. Thus there is a potential... 

Since this early discovery there has been considerable appreciation for the role of the soil microbial community in pesticide transformations. In some cases the role of microorganisms has been stressed by comparison of degradation rates in natural and sterilized systems (32), while in others researchers have chosen to use isolation of pesticide-degrading microorganisms from soil sis evidence of microbial involvement (33). It has also been recognized that environmental conditions that influence microbial activity (temperature, moisture,...) affect the microbial degradation of pesticides in soil (34). The importance of microbial involvement is demonstrated by the many reviews of pesticide/microbe interactions that have appeared (35-41). 

Qualitative and quantitative as well as stable carbon isotope analyses were performed and discussed in terms of environmental stability of the groundwater residues described. Anaerobic microbial degradation of the main pollutant 1-chloronaphthalene was evident from identification of 1-chloro-4-naphthol and 1-chloronaphthoic acid as biotic transformation products. While this observation indicates microbial involvement in degradation of chloronaphthalenes, several aspects of our analysis are inconsistent with an extensive degree of microbial degradation ... 

Amitrole rapidly disappears from the soil. According to the investigation of Kaufman el al. (1968) and Plimmer et al. (1967) degradation does not proceed by the biological pathway this implies the opening of the amitrole ring and the formation of nontoxic products. However, microbial involvement cannot be excluded. 

Setchell, K.D., A.M. Lawson, S.P. Bordello, R. Harkness, H. Gordon, D.M. Morgan, D.N. Kirk, H. Adlercreatz, L.C. Anderson, and M. Axelson. 1981. Lignan formation in man — microbial involvement and possible roles in relation to cancer. Lancet 2 4-7. 

P G Boeder, Microbial involvement in chronic wound malodour . Journal of Woundcare 1999 8(5)216-218. 

The lignan formation also could play an important role on a man-microbial involvement such as anticancer property for some cancers by bacteria source [57]. 

Setehell KD, Lawson AM, Borriello SP, Harkness R, Gordon H, Morgan DM, Kirk DN, Adlercreatz H, Anderson LC, Axelson M. Lignan formation in man—microbial involvement and possible roles in relation to cancer. Lancet 2( 236), 4-7, 1981. 

Setchel K D R, Borriello S P, Gordon H, Lawson A M, Harkness R, Morgan D M L, Kirk D N, Adlercreutz H, Anderson L C, Arelson M 1981 Lignan formation in man. Microbial involvement and possible roles in relation to cancer. Lancet July 4 4-7... 

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