ABSTRACT. The Zetaproteobacteria are a class of bacteria typically associated with marine Fe(II)-oxidizing environments. First discovered in the hydrothermal vents at Loihi Seamount, Hawaii, they have become model organisms for marine microbial Fe(II) oxidation.
A promising candidate for Fe (II)-oxidizer biosignatures is the distinctive morphology and texture of extracellular Fe (III)-oxyhydroxide stalks produced by mat …
In Rp. palustris TIE-1, the deletion of pioA consequences in nearly full loss of Fe(II)-oxidizing capacity, although the deletion of PioB and PioC consequences in only partial loss when correlated to the wild type ... In addition, the remediation of environments contaminated by metalloids, metals, and hazardous organics may benefit from the use ...
The parabolic rate constant K p may be described by the following expression [19]: (5) K p ≡ 2D eff C* N where D eff is the diffusion coefficient of oxidizing gas in the amorphous SiO 2 scale. C* is the solubility of oxidizing gases in the oxide scale; N is the number of oxidizing gaseous species in unit oxide.. Known from Eq. (5), the …
Biogeochemical cycling of iron is crucial to many environmental processes, such as ocean productivity, carbon storage, greenhouse gas emissions and the fate of …
Manganese oxides are the strongest natural oxidants in our environments aside from oxygen. Most natural manganese oxides are produced through the Mn(II) oxidation process driven by microbes. Biogenic manganese oxides (BioMnOx) are usually amorphous and rich in defects and possess large surface areas, resulting in high …
Little attention has been paid to the role of neutrophilic, lithotrophic, iron-oxidizing bacteria (FeOB) in MIC. ... Mild steel samples incubated in nearshore environments were colonized by marine FeOB, as evidenced by the presence of helical iron-encrusted stalks diagnostic of the FeOB Mariprofundus ferrooxydans, a member of the candidate ...
The Zetaproteobacteria are a class of bacteria typically associated with marine Fe(II)-oxidizing environments. First discovered in the hydrothermal vents at Loihi Seamount, Hawaii, they have ...
A review ofthe corrosion ofalloys in oxidizing/sulphidizing environments is presented,with specialemphasis on high temperature alloys. As in part I * of this work which dealt with corrosion in pure metals, the simultaneous formation ofoxide and sulphide is considered in detail by describing possible reaction paths and transport phenomena of ...
Phototrophic iron (II) [Fe (II)]-oxidizing bacteria are present in modern environments and evidence suggests that this metabolism was present already on early earth. We …
Phototrophic iron (II) [Fe (II)]-oxidizing bacteria are present in modern environments and evidence suggests that this metabolism was present already on early …
Coexistence of microaerophilic Fe(II)-oxidizers and anaerobic Fe(III)-reducers in environments with fluctuating redox conditions is a prime example of mutualism, in which both partners benefit ...
Mn(II)-oxidizing microbes have an integral role in the biogeochemical cycling of manganese, iron, nitrogen, carbon, sulfur, and several nutrients and trace metals. There is great interest in mechanistically understanding these cycles and defining the importance of Mn(II)-oxidizing bacteria in modern and ancient geochemical environments. Linking …
Combined data from geochemical analyses, molecular surveys, and culture-based experiments suggest that a unique consortia of Mn(II)-oxidizing bacteria are abundant and promoting biomineralization processes within the caves of the upper Tennessee River Basin. The upper Tennessee River Basin contains the highest density …
Abstract. Neutrophilic iron oxidizing bacteria (FeOB) must actively compete with rapid abiotic processes governing Fe(II) oxidation and as a result have adapted to primarily inhabit low-O 2 environments where they can more successfully compete with abiotic Fe(II) oxidation. The spatial distribution of these microorganisms can be observed …
Article: Physiology of phototrophic iron(II)-oxidizing bacteria: implications for modern and ancient environments. Phototrophic iron(II) [Fe(II)]-oxidizing bacteria are present in modern environments and evidence suggests that this metabolism was present already... Search. Top Buy Now Abstract Related. Home > Section > Chapter ...
ABSTRACT The Zetaproteobacteria are a class of bacteria typically associated with marine Fe(II)-oxidizing environments. First discovered in the hydrotherm...
A promising candidate for Fe (II)-oxidizer biosignatures is the distinctive morphology and texture of extracellular Fe (III)-oxyhydroxide stalks produced by mat-forming …
By rigorously quantifying the intermediate processes, this study eliminated the potential for abiotic Fe (II) oxidation to be exclusively responsible for NDFO and verified the key …
The Microorganism and Growth Media. The strain of B. ferrooxidans was isolated from a paddy soil collected in Yingtan, China (116°82′E, 28°2′N) (Zhou et al., 2016, 2018).For routine cultivation of the strain, we used a mineral culture medium (pH 6.8–7.2) amended with 10 mM NaNO 3 and 10 mM FeCl 2.The cultures were started by adding …
A micromechanics model is presented to predict the residual tensile strength of SiC/C/SiC minicomposites within the temperature range of 900–1300 °C in stressed oxidizing environments. The model is based on a new oxidation kinetics model of 1D-SiC/C/SiC composites, which gives the silica thickness profiles along the matrix cracks …
The opposing O 2 and Fe(II) gradients that developed in the gel-stabilized semi-solid overlay allowed microaerophilic Fe(II)-oxidizing bacteria to grow at the oxic-anoxic interface (Emerson and Moyer, 1997, Edwards et al., 2003, Fig. S1). To inoculate, equal qualities of soil and sterile water were mixed and 10 μl of suspension was drawn …
Neutrophilic Fe(II) oxidizing bacteria like Mariprofundus ferrooxydans are obligate chemolithoautotrophic bacteria that play an important role in the biogeochemical cycling of iron and other ...
Type II methane-oxidizing bacteria (MOB) were isolated from diverse environments, including rice paddies, pristine and polluted freshwaters and sediments, mangrove roots, upland soils, brackish water ecosystems, moors, oil wells, water purification systems and livestock manure. Isolates were identif …
In any case, the oxidation rate of Fe(II) in the SML would be much higher than in the underlying water not only because of the higher oxygen availability (which is a rate-determining factor in these environments), but also because of a higher concentration of biomass and cell density of Fe(II)-oxidizing bacteria in this layer [1,2,3,4,5,6,7].
Nitrate-reducing Fe(II)-oxidizing (NRFeOx) bacteria couple Fe(II) oxidation to the reduction of nitrate (NO 3 À ) in anoxic environments (Roden, 2012;Straub et al., 1996;Weber et al., 2006).
Anaerobic microbial iron oxidation and reduction contributes significantly to soil and sediment biogeochemistry and mineralogy in anaerobic environments. Here, Weber and colleagues review the ...
Mn(II)-oxidizing bacteria (MOB) are phylogenetically diverse and are detected in many different environments, such as soils, water (fresh to marine), and sediments . While microorganisms readily oxidize Mn(II) and precipitate Mn oxides at pH ∼7 under oxic and hypoxic conditions ( 5 ), little is known about biological oxidation at acidic …
Physiology of phototrophic iron(II)-oxidizing bacteria: implications for modern and ancient environments
The Zetaproteobacteria are a class of bacteria typically associated with marine Fe(II)-oxidizing environments. First discovered in the hydrothermal vents at Loihi Seamount, Hawaii, they have become model organisms for marine microbial Fe(II) oxidation. In addition to deep sea and shallow hydrothermal vents, Zetaproteobacteria …
