2008 Kaplan USMLE Step 1 Home Study Program-Brand New Volume by by Kaplan

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As yet, there are not many studies that specifically evaluate the linkage between metal behaviour and biofilm metabolic functional activity. However, acid mine drainage (AMD) has long been recognized as one of the earliest environSGM symposium 65 23 24 L. A. Warren Fig. 4. Biofilms form at solid–solution interfaces, either at bed-sediment solution interfaces or at suspended particle surfaces (a), thus overlapping with the reactive interface for metal solid–solution partitioning. These biologically controlled interfacial structures can profoundly influence the nature, extent and types of geochemical processes that occur, particularly with respect to those that influence metal partitioning in a manner dependent on the particular array of metabolic functions expressed within a given biofilm (b).

C. (1995). Lead distribution in a simulated aquatic environment: effects of bacterial biofilms and iron oxide. Water Res 29, 1934–1944. Nelson, Y. , Lion, L. , Ghiorse, W. C. & Shuler, M. L. (1999). Production of biogenic Mn oxides by Leptothrix discophora SS-1 in a chemically defined growth medium and evaluation of their Pb adsorption characteristics. Appl Environ Microbiol 65, 175–180. Neu, T. R. & Lawrence, J. R. (1997). Development and structure of microbial biofilms in river water studied by confocal laser scanning microscopy.

Brown, G. , Jr, Yoon, T. , Johnson, S. , Templeton, A. , Trainor, T. , Bostick, B. , Doyle, C. S. & Spormann, A. M. (2004). The role of organic molecules and microbial organisms in metal ion sorption processes. Geochim Cosmochim Acta 68, A160. Buffle, J. (1988). Complexation Reactions in Aquatic Systems: an Analytical Approach. Chichester: Ellis Horwood. Campbell, P. G. C. (1995). Interactions between trace metals and aquatic organisms: a critique of the free-ion activity model. In Metal Speciation and Bioavailability in Aquatic Systems, IUPAC Series on Analytical and Physical Chemistry of Environmental Systems, pp.

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