Bioavailability of trace metals to aquatic microorganisms: Importance of chemical, biological and physical processes on biouptake

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Show simple item record Worms, I Simon, D Hassler, CS Wilkinson, KJ 2010-05-28T09:45:18Z 2006-01
dc.identifier.citation Biochimie: an international journal of biochemistry and molecular biology, 2006, 88 (11), pp. 1721 - 1731
dc.identifier.issn 0300-9084
dc.identifier.other C1UNSUBMIT en_US
dc.description.abstract An important challenge in environmental biogeochemistry is the determination of the bioavailability of toxic and essential trace compounds in natural media. For trace metals, it is now clear that chemical speciation must be taken into account when predicting bioavailability. Over the past 20 years, equilibrium models (free ion activity model (FIAM), biotic ligand model (BLM)) have been increasingly developed to describe metal bioavailability in environmental systems, despite the fact that environmental systems are always dynamic and rarely at equilibrium. In these simple (relatively successful) models, any reduction in the available, reactive species of the metal due to competition, complexation or other reactions will reduce metal bioaccumulation and thus biological effects. Recently, it has become clear that biological, physical and chemical reactions occurring in the immediate proximity of the biological surface also play an important role in controlling trace metal bioavailability through shifts in the limiting biouptake fluxes. Indeed, for microorganisms, examples of biological (transport across membrane), chemical (dissociation kinetics of metal complexes) and physical (diffusion) limitation can be demonstrated. Furthermore, the organism can employ a number of biological internalization strategies to get around limitations that are imposed on it by the physicochemistry of the medium.
dc.publisher Elsevier Masson
dc.title Bioavailability of trace metals to aquatic microorganisms: Importance of chemical, biological and physical processes on biouptake
dc.type Journal Article
dc.parent Biochimie: an international journal of biochemistry and molecular biology
dc.journal.volume 11
dc.journal.volume 88
dc.journal.number 11 en_US
dc.publocation France en_US
dc.identifier.startpage 1721 en_US
dc.identifier.endpage 1731 en_US SCI.Environmental Sciences en_US
dc.conference Verified OK en_US
dc.for 0605 Microbiology
dc.personcode 107808
dc.percentage 100 en_US Microbiology en_US
dc.classification.type FOR-08 en_US
dc.edition en_US
dc.custom en_US en_US
dc.location.activity en_US
dc.description.keywords Bioaccumulation; Uptake; Internalization; Microbiology; Trace metal; Diffusion; Complex; Regulation en_US
dc.description.keywords Bioaccumulation
dc.description.keywords Uptake
dc.description.keywords Internalization
dc.description.keywords Microbiology
dc.description.keywords Trace metal
dc.description.keywords Diffusion
dc.description.keywords Complex
dc.description.keywords Regulation
pubs.embargo.period Not known
pubs.organisational-group /University of Technology Sydney
pubs.organisational-group /University of Technology Sydney/Faculty of Science
utslib.copyright.status Closed Access 2015-04-15 12:17:09.805752+10
utslib.collection.history Closed (ID: 3)

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