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Ruggero Vigliaturo Alessandra Marengo Erica Bittarello Ileana Prez‐Rodríguez Goran Drai Reto Gier 《Geobiology》2020,18(5):606-618
Neutrophilic, microaerobic Fe(II)‐oxidizing bacteria (FeOB) from marine and freshwater environments are known to generate twisted ribbon‐like organo‐mineral stalks. These structures, which are extracellularly precipitated, are susceptible to chemical influences in the environment once synthesized. In this paper, we characterize the minerals associated with freshwater FeOB stalks in order to evaluate key organo‐mineral mechanisms involved in biomineral formation. Micro‐Raman spectroscopy and Field Emission Scanning Electron Microscopy revealed that FeOB isolated from drinking water wells in Sweden produced stalks with ferrihydrite, lepidocrocite and goethite as main mineral components. Based on our observations made by micro‐Raman Spectroscopy, field emission scanning electron microscopy and scanning transmission electron microscope combined with electron energy‐loss spectroscopy, we propose a model that describes the crystal‐growth mechanism, the Fe‐oxidation state, and the mineralogical state of the stalks, as well as the biogenic contribution to these features. Our study suggests that the main crystal‐growth mechanism in stalks includes nanoparticle aggregation and dissolution/re‐precipitation reactions, which are dominant near the organic exopolymeric material produced by the microorganism and in the peripheral region of the stalk, respectively. 相似文献
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de Paula Araújo Wellington Luiz Negrão Adriana Fava Vieira José Cavalcante souza Bittarello Alis Correia de Magalhães Padilha Pedro de Oliveira Orsi Ricardo 《Biological trace element research》2020,195(2):648-657
Biological Trace Element Research - This study aimed to evaluate the quality of the royal jelly produced by Apis mellifera bees in the presence of different iron concentrations (ferrous sulfate... 相似文献
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de Queiroz João Vitor Vieira José Cavalcante Souza da Cunha Bataglioli Izabela Bittarello Alis Correia Braga Camila Pereira de Oliveira Grasieli do Carmo Federici Padilha Cilene de Magalhães Padilha Pedro 《Biological trace element research》2018,184(2):517-522
Biological Trace Element Research - This paper presents a slurry sampling method for total mercury determination by graphite furnace atomic absorption spectrometry (GFAAS) in tissue of fish from... 相似文献
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