pyrite oxidation lipid

The High

A high-molecular-weight c -type cytochrome, Cyc2, and a putative 22-kDa c -type cytochrome were detected in the membrane fraction released during spheroplast formation from Acidithiobacillus ferrooxidans . This fraction was enriched in outer membrane components and devoid of cytoplasmic membrane markers. The genetics, as well as the subcellular localization of Cyc2 at the outer Get price

Lipid biomarker analysis and stable carbon isotope studies of

Lipid biomarker analysis and stable carbon isotope studies of biofilms in the Green Valley acid mine drainage site, Indiana, U.S.A. by Shamik Das Gupta A dissertation submitted to the graduate faculty in partial fulfillment of the requirements for the degree of Get price

Lipid biomarker analysis and stable carbon isotope studies of

Lipid biomarker analysis and stable carbon isotope studies of biofilms in the Green Valley acid mine drainage site, Indiana, U.S.A. by Shamik Das Gupta A dissertation submitted to the graduate faculty in partial fulfillment of the requirements for the degree of Get price

Comparison of fluorescence

2008/2/28In order to measure hydroxyl radicals generated by ferrous iron solutions and pyrite suspensions, a different calibration curve was used. The gain was still adjusted to display a relative fluorescence intensity of 1000 in the presence of 1000 nM H 2 O 2 and HRP, but the signal from each probe in the absence of H 2 O 2 and HRP (i.e., values to the left of the vertical axis), rather than the Get price

Sedimentary pyrite δ34S differs from porewater sulfide in Santa

1 Sedimentary pyrite δδδδ34S differs from porewater sulfide in Santa Barbara Basin: proposed role of organic sulfur Morgan Reed Raven a*, Alex L. Sessions a, Woodward W. Fischer a, Jess F. Adkins a a Division of Geological and Planetary Sciences, California Institute of Technology, Pasadena, CA 91125, Get price

Pyrite oxidation inhibition by a cross

Article Pyrite oxidation inhibition by a cross-linked lipid coating Xiang Zhang,a Michael J. Borda,b Martin A. A. Schoonenb and Daniel R. Strongin*a aDepartment of Chemistry, Temple University, Philadelphia, PA 19122. E-mail: daniel.strongintemple.edu bGeosciences Department, The State University of New York at Stony Brook, Get price

Methane

Cold seeps along the North Anatolian fault in the Sea of Marmara (Turkey) were explored during submersible dives of the Marsite cruise in November 2014 when sediments, pore waters and carbonate crusts were sampled at active fluid seeping sites. In this study, we investigate the mineralogy, carbon and oxygen isotopic compositions and the lipid biomarkers of a carbonate crust from the western Get price

Formation of iron sulﬁde nodules during anaerobic oxidation of

Formation of iron sulﬁde nodules during anaerobic oxidation of methane Bart E. van Dongen a,*, Andrew P. Roberts b, Stefan Schouten c, Wei-Teh Jiang d, Fabio Florindo e, Richard D. Pancost a a Organic Geochemistry Unit, Bristol Biogeochemistry Research Centre, School of Chemistry, Cantock's Close, Bristol University, Get price

Rhyolite Meaning Healing Properties

Creativity is the language of the soul and if it could speak, it might tell you to be a little kinder to yourself, especially if you're drawn to the Rhyolite crystal. While pink stones like Rhodochrosite and Rose Quartz help attract love into your life, the Rhyolite crystal meaning is all about self-love, its radiant energy infusing your spirit with pure joy, like an antidepressant but without Get price

Mapping and Prediction of Coal Workers' Pneumoconiosis

Aqueous oxidation of pyrite by molecule of oxygen. Chem Rev 82:461-497. Crossref, Google Scholar Maclaren WM, Hurley JF, Collins HP, Cowie AJ. 1989. Factors associated with the development of progressive massive fibrosis in British coalminers: a case. . Get price

Method for inhibiting oxidation of metal sulfide

Abstract The present invention provides means for inhibiting the oxidation of a metal sulfide-containing material, such as ore mine waste rock or metal sulfide taiulings, by coating the metal sulfide-containing material with an oxidation-inhibiting two-tail lipid coating (12) thereon, thereby inhibiting oxidation of the metal sulfide-containing material in acid mine drainage conditions. Get price

Effects of FeS2 on the process of coal spontaneous combustion at

FeS 2 is the main component of pyrite, which is suspected to be a major contributor to coal spontaneous combustion (CSC). So, it has important significance to FeS 2 on the characteristics of coal oxidation for prevention and treatment. This study used coal 2 Get price

Ancestral lipid biosynthesis and early membrane evolution:

Archaea possess unique membrane phospholipids that generally comprise isoprenoid ethers built on sn-glycerol-1-phosphate (G1P). By contrast, bacterial and eukaryal membrane phospholipids are fatty acid esters linked to sn-glycerol-3-phosphate (G3P). The two key dehydrogenase enzymes that produce G1P and G3P, G1PDH and G3PDH, respectively, are not homologous. Various models propose that these Get price

Rethinking the Ancient Sulfur Cycle

Isotopic fractionation during biological sulfide oxidation is generally considered to be negligible (Canfield 2001a).Abiotic oxidation of sulfide to sulfur, thiosulfate, sulfite, or sulfate can produce fractionations as large as 5‰ (Fry et al. 1988), but demonstrated biological fractionations during both aerobic sulfur oxidation and phototrophic sulfur oxidation are on the order of 1–2 Get price

Pyrite oxidation inhibition by a cross

In short, the inhibition of pyrite oxidation is due to a cross-linked lipid rather than layer of lipid decomposition fragments. Cross-linking within the adsorbed lipid layer through the diacetylene groups of the lipid, presumably described by the following scheme, forms a conjugated structure,[ 9 ] that would not be expected to result in an experimentally observable change in the FTIR spectrum Get price

The effect of pH on the kinetics of spontaneous Fe(II)

The spontaneous chemical oxidation of Fe(II) to Fe(III) by O(2) is a complex process involving meta-stable partially oxidized intermediate species such as green rusts, which ultimately transform into a variety of stable iron oxide end-products such as hematite, magnetite, goethite and lepidocrocite. Although in many practical situations the nature of the end-products is of less interest than Get price

Pyrite oxidation inhibition by a cross

2003/11/29In short, the inhibition of pyrite oxidation is due to a cross-linked lipid rather than layer of lipid decomposition fragments. Cross-linking within the adsorbed lipid layer through the diacetylene groups of the lipid, presumably described by the following scheme, forms a conjugated structure,[ 9 ] that would not be expected to result in an experimentally observable change in the FTIR spectrum Get price

Rethinking the Ancient Sulfur Cycle

Isotopic fractionation during biological sulfide oxidation is generally considered to be negligible (Canfield 2001a).Abiotic oxidation of sulfide to sulfur, thiosulfate, sulfite, or sulfate can produce fractionations as large as 5‰ (Fry et al. 1988), but demonstrated biological fractionations during both aerobic sulfur oxidation and phototrophic sulfur oxidation are on the order of 1–2 Get price

Adsorption of Phospholipids on Pyrite and Their Effect on

The adsorption of this type of lipid on pyrite resulted in a strong suppression of the oxidation of the mineral under oxic conditions down to a pH of 1.0. No such oxidation suppression was experimentally observed when 1,2-dipropionoyl- sn -glycero-3-phosphocholine, a short-chain, two-tailed lipid, was used to form an adsorbed phase. Get price

chemolithotrophic bacterium Thiobacillus ferrooxidans

Factors affecting oxidation of pyrite by Thiobacillus ferrooxidans Indian J. Exp. Biol., 19, 728 – 732. 66 Roy P. Mishra A.K. (1981) Iron oxidation not coupled to growth in Thiobacillus ferrooxidans in presence of toxic metals J. Appl. Bacteriol., 51, 387 – 392. Get price

Direct Detection of Fe(II) in Extracellular Polymeric

The detection of Fe(II) also indicates that Fe(III) resulting from pyrite oxidation may effectively function as an oxidizing agent for pyrite at the cell-pyrite interface. Thus, our results imply that a key role of Fe(III) in EPS, in addition to its previously described role in the electrostatic attachment of the cell to pyrite, is enhancing pyrite dissolution. Get price

Hydrogeochemical modeling of enhanced benzene,

The pyrite oxidation rate equation of Williamson and Rimstidt was fitted to the reaction of FeS with NO 3 Microbial Hydrocarbon Degradation at Coal Gasification Plants, Handbook of Hydrocarbon and Lipid Microbiology, 10.1007/978-3-540-77587-4, (2010). Get price

Comparison of fluorescence

2008/2/28In order to measure hydroxyl radicals generated by ferrous iron solutions and pyrite suspensions, a different calibration curve was used. The gain was still adjusted to display a relative fluorescence intensity of 1000 in the presence of 1000 nM H 2 O 2 and HRP, but the signal from each probe in the absence of H 2 O 2 and HRP (i.e., values to the left of the vertical axis), rather than the Get price

Mechanism of microbial flotation using Thiobacillus

10.1002/bit.260410611.abs Microbial desulfurization might be developed as a new process for the removal of pyrite sulfur from coal sluries such as coal–water mixture (CWM). An application of iron‐oxidizing bacterium Thiobacillus ferrooxidans to flotation would shorten the periods of the microbial removal of pyrite from some weeks by leaching methods to a few minutes. The floatability of Get price

Method for inhibiting oxidation of metal sulfide

2006/12/26The pyrite/lipid suspension was mixed for 10 minutes and then transferred into 100 mL of pH 2 deionized water. The control experiment, to which the lipid/pyrite oxidation rate results were compared, consisted of 0.4 g of acid washed pyrite in the 100 mL of pH 2 Get price