Formation of the magnetoordering phase by thermophilic Fe(III)-reducing bacteria: A Mossbauer studyстатья
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Дата последнего поиска статьи во внешних источниках: 27 мая 2015 г.
Аннотация:Mossbauer investigations of the iron atom state in the magnetoordering phase of thermophilic dissimilatory Fe(III)-reducing bacterium and long-time dynamic experiments on the formation of iron-bearing minerals in control conditions were carried out. Bacterium growing anaerobically was isolated from ferric sediments in hot springs (T = 60-65degreesC and pH = 6.8-7.0) on Kunashir Island. This microorganism used amorphous Fe(III)-hydroxide as an electron acceptor and acetate CH3COO- as an electron donor. During thermophilic bacterium growth, we observed the formation of a black magnetic phase. Samples with different times of bacterium influence on the sediment from several series of experiments were studied by Mossbauer spectroscopy methods. We also investigated the influence of different physicochemical conditions on the formation of the solid phase, the product of the vital functions of thermophilic Fe(III)-reducing bacterium.