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Books > Science & Mathematics > Biology, life sciences > Microbiology (non-medical)
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Microbial Metal Respiration - From Geochemistry to Potential Applications (Paperback, 2012 ed.)
Loot Price: R4,557
Discovery Miles 45 570
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Microbial Metal Respiration - From Geochemistry to Potential Applications (Paperback, 2012 ed.)
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Microbes can respire on metals. This seemingly simple finding is
one of the major discoveries that were made in the field of
microbiology in the last few decades. The importance of this
observation is evident. Metals are highly abundant on our planet.
Iron is even the most abundant element on Earth and the forth most
abundant element in the Earth's crust. Hence, in some environments
iron, but also other metals or metalloids, are the dominant
respiratory electron acceptors. Their reduction massively drives
the carbon cycle in these environments and establishes redox cycles
of the metallic electron acceptors themselves. These redox cycles
are not only a driving force for other biotic reactions but are
furthermore necessary for initiating a number of geochemically
relevant abiotic redox conversions. Although widespread and
ecologically influential, electron transfer onto metals like ferric
iron or manganese is biochemically challenging. The challenge is to
transfer respiratory electrons onto metals that occur in nature at
neutral pH in the form of metal oxides or oxihydroxides that are
effectively insoluble. Obviously, it is necessary that the microbes
specially adapt in order to catalyze the electron transfer onto
insoluble electron acceptors. The elucidation of these adaptations
is an exciting ongoing process. To sum it up, dissimilatory metal
reduction has wide-spread implications in the field of
microbiology, biochemistry and geochemistry and its discovery was
one of the major reasons to establish a novel scientific field
called geomicrobiology. Recently, the discovery of potential
applications of dissimilatory metal reducers in bioremediation or
current production in a microbial fuel cell further increased the
interest in studying microbial metal reduction.
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