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The structural plasticity of the proximal [4Fe3S] cluster is responsible for the O2 tolerance of membrane-bound [NiFe] hydrogenases.
Jean-Marie Mouesca et al.
Angewandte Chemie (International ed. in English), 52(7), 2002-2006 (2013-01-09)
Wei Wang et al.
Astrobiology, 11(5), 471-476 (2011-06-29)
The iron-sulfur world (ISW) theory is an intriguing prediction regarding the origin of life on early Earth. It hypothesizes that life arose as a geochemical process from inorganic starting materials on the surface of sulfide minerals in the vicinity of
Andrew D Henderson et al.
Water research, 47(3), 1267-1276 (2012-12-19)
Iron sulfide (FeS) has been extensively assessed as a reactive medium to remove both metals and halogenated organics from groundwater. However, to address its suitability as a material for permeable reactive barriers (PRBs), its propensity for solids and gas production
Amit Kumar Dutta et al.
ACS applied materials & interfaces, 4(4), 1919-1927 (2012-03-28)
Nanocrystalline FeS and FeSe compounds were prepared by solvothermal decomposition of a precursor complex [Fe(3)(μ(3)-O)(μ(2)-O(2)CCH(2)Cl)(6)(H(2)O)(3)]NO(3)·H(2)O in the presence of thiourea and sodium selenite, respectively. The as-obtained products were characterized by X-ray diffraction analysis (XRD), field emission scanning electron microscopy (FESEM)
Valerie Ronay et al.
Oral health & preventive dentistry, 9(1), 37-45 (2011-05-20)
The purpose of this review was to summarise the fundamentals about black stain, its diagnosis and possible differential diagnoses as well as its microbiology and therapy. In addition, various studies investigating the relationship between black stain and dental caries are
N Finck et al.
Environmental science & technology, 46(18), 10004-10011 (2012-08-21)
The isotope (79)Se may be of great concern with regard to the safe disposal of nuclear wastes in deep geological repositories due to its long half-life and potential mobility in the geosphere. The Se mobility is controlled by the oxidation
Oxidation of pyrite and iron sulfide by manganese dioxide in marine sediments.
Schippers A and J?rgensen BB.
Geochimica et Cosmochimica Acta, 65(6), 915-922 (2001)
Vanessa N L Wong et al.
Water research, 47(2), 821-832 (2012-12-04)
Benthic sediments in coastal acid sulfate soil (CASS) drains can contain high concentrations (~1-5%) of acid volatile sulfide (AVS) as nano-particulate mackinawite. These sediments can sequester substantial quantities of trace metals. Because of their low elevation and the connectivity of
Young-Soo Han et al.
Water research, 45(17), 5727-5735 (2011-09-14)
Iron sulfide (FeS) has been demonstrated to have a high removal capacity for arsenic (As) in reducing environments. However, FeS may be present as a coating, rather than in nanoparticulate form, in both natural and engineered systems. Frequently, the removal
Mei Wang et al.
Dalton transactions (Cambridge, England : 2003), 40(48), 12793-12800 (2011-10-11)
The research on structural and functional biomimics of the active site of [FeFe]-hydrogenases is in an attempt to elucidate the mechanisms of H(2)-evolution and uptake at the [FeFe]-hydrogenase active site, and to learn from Nature how to create highly efficient
David P Summers et al.
Astrobiology, 12(2), 107-114 (2012-01-31)
Understanding the abiotic fixation of nitrogen and how such fixation can be a supply of prebiotic nitrogen is critical for understanding both the planetary evolution of, and the potential origin of life on, terrestrial planets. As nitrogen is a biochemically
Thanh Binh Nguyen et al.
Journal of the American Chemical Society, 135(1), 118-121 (2012-12-20)
Iron sulfide generated in situ from elemental sulfur and iron was found to be highly efficient in catalyzing a redox/condensation cascade reaction between 2-amino/hydroxy nitrobenzenes and activated methyl groups. This method represents a straightforward and highly atom economical approach to
Chen Xu et al.
ACS nano, 6(6), 4713-4721 (2012-05-10)
We report a facile approach to prepare carbon-coated troilite FeS (C@FeS) nanosheets via surfactant-assisted solution-based synthesis. 1-Dodecanethiol is used as both the sulfur source and the surfactant, which may form different-shaped micelles to direct the growth of nanostructures. Under appropriate
Bo Zhang et al.
Proceedings of the National Academy of Sciences of the United States of America, 109(39), 15734-15739 (2012-09-29)
Fumarate and nitrate reduction (FNR) regulatory proteins are O(2)-sensing bacterial transcription factors that control the switch between aerobic and anaerobic metabolism. Under anaerobic conditions [4Fe-4S](2+)-FNR exists as a DNA-binding homodimer. In response to elevated oxygen levels, the [4Fe-4S](2+) cluster undergoes
Eun-Ju Kim et al.
ACS applied materials & interfaces, 3(5), 1457-1462 (2011-04-28)
Multicomponent nanoparticles containing two or more different types of functionalities show unique physical and chemical properties, leading to significantly enhanced performance. In this study, we have developed a new one-pot method to prepare Fe/FeS nanoparticles using dithionite at room temperature.
Elisa Guazzelli et al.
Polymers, 12(6) (2020-06-04)
Diblock copolymers composed of a polystyrene first block and a PEG-fluoroalkyl chain-modified polystyrene second block were synthesized by controlled atom transfer radical polymerization (ATRP), starting from the same polystyrene macroinitiator. The wettability of the polymer film surfaces was investigated by
Insights into the mechanistic role of the [Fe4S4] cubane in the A-cluster {[Fe4S4]-(SR)-[NipNid]} of acetyl-coenzyme A synthase.
Yi Liu et al.
Chembiochem : a European journal of chemical biology, 12(9), 1417-1421 (2011-06-01)
Tomasz Kuder et al.
Environmental science & technology, 46(14), 7495-7502 (2012-06-09)
EDB (1,2-dibromoethane) is frequently detected at sites impacted by leaded gasoline. In reducing environments, EDB is highly susceptible to abiotic degradation. A study was conducted to evaluate the potential of compound-specific isotope analysis (CSIA) in assessing abiotic degradation of EDB
Dong Suk Han et al.
Journal of hazardous materials, 186(1), 451-457 (2010-11-30)
Higher concentrations (127, 253 μM) of Se(IV) at pH 8 were completely removed by 0.5 g/L FeS within 120 min. Removal of Se(VI) by FeS at pH 8 was less extensive than removal of Se(IV). Only 10% of the Se(VI)
Mahesh Sundararajan et al.
Dalton transactions (Cambridge, England : 2003), 40(42), 11156-11163 (2011-08-13)
The fate of actinyl species in the environment is closely linked to oxidation state, since the reduction of An(VI) to An(IV) greatly decreases their mobility due to the precipitation of the relatively insoluble An(IV) species. Here we study the mechanism
Sung Pil Hyun et al.
Environmental science & technology, 46(6), 3369-3376 (2012-02-10)
Reaction of aqueous uranium(VI) with iron(II) monosulfide mackinawite in an O(2) and CO(2) free model system was studied by batch uptake measurements, equilibrium modeling, and L(III) edge U X-ray absorption spectroscopy (XAS). Batch uptake measurements showed that U(VI) removal was
Amnorzahira Amir et al.
Journal of hazardous materials, 235-236, 359-366 (2012-09-04)
We demonstrated adsorption and reduction of cobalamin(III) (Co(III)) on nano-mackinawite (nFeS) surface and their impact on reductive dechlorination of tetrachloroethene (PCE). The adsorption of Co(III) on the nFeS surface followed Langmuir isotherm and the reduction of Co(III) provided different reactive
Effects of solution composition and pH on the reductive dechlorination of hexachloroethane by iron sulfide.
Butler EC and Hayes KF.
Environmental Science & Technology, 32(9), 1276-1284 (1998)
Romain Guilbaud et al.
Science (New York, N.Y.), 332(6037), 1548-1551 (2011-06-28)
The iron isotope composition of sedimentary pyrite has been proposed as a potential proxy to trace microbial metabolism and the redox evolution of the oceans. We demonstrate that Fe isotope fractionation accompanies abiotic pyrite formation in the absence of Fe(II)
Elvira Bura-Nakić et al.
Environmental science & technology, 47(2), 741-749 (2012-12-18)
Recent publications have shown that the anodic reaction between FeS and Hg can be used for electrochemical detection of colloidal and particulate FeS in natural waters. Anodic waves that were recorded around -0.45 V (vs Ag/AgCl) in model solutions correspond
Bin Huang et al.
Bioresource technology, 102(21), 10154-10157 (2011-09-07)
The performance of acetic acid-supported pH-heterogenized heterotrophic denitrification (HD) facilitated with ferrous sulfide-based autotrophic denitrification (AD) was investigated in upflow activated carbon-packed column reactors for reliable removal of highly elevated nitrate (42 mg NO(3)-Nl(-1)) in drinking water. The use of
A Diener et al.
Journal of contaminant hydrology, 133, 30-39 (2012-04-10)
Selenium has a toxic potential leading to diseases by ingestion and a radiotoxic potential as (79)Se radionuclide if discharged from a high-level nuclear waste repository in deep geological formations into the biosphere. Selenium is often associated with sulfides, such as
W Schier et al.
Water science and technology : a journal of the International Association on Water Pollution Research, 66(12), 2524-2532 (2012-10-31)
Since the mid-nineties membrane bioreactor (MBR) technology has been introduced to municipal wastewater treatment in Europe. The first MBR plants went into operation performing a conventional mechanical pre-treatment (MPT) without any advanced treatment units. After a short operation period, clogging
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