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Sulfides (1):
Recent article
Sulfides
Abstract
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Abstract
We show here that the symbionts of the hydrothermal vent mussel Bathymodiolus from the Mid-Atlantic Ridge use hydrogen to power primary production. In addition, we show that the symbionts of Bathymodiolus mussels from Pacific vents have hupL, the key gene for hydrogen oxidation. Furthermore, the sym...
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PMID: 21833083
PDF is available here.
PDF is available here.
Abstract
We demonstrate that a pure, actively growing culture of a marine sulfate-reducing bacterium can deplete (34)S by up to 66‰ during sulfate reduction alone and in the absence of an extracellular oxidative sulfur cycle. Therefore, similar magnitudes of sulfur isotope fractionation in sedimentary rock...
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PMID: 21719675
PDF is available here.
PDF is available here.
Abstract
We present sulphur isotope records from six globally distributed stratigraphic sections of later Cambrian marine rocks (about 499 million years old). We find a positive sulphur isotope excursion in phase with the Steptoean Positive Carbon Isotope Excursion (SPICE), a large and rapid excursion in the...
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PMID: 21209662
PDF is available here.
PDF is available here.
Abstract
We developed a sensitive and automated method to simultaneously analyze eight T&O compounds (boiling points ranging from 38°C to 239°C) by using Purge-and-Trap (P&T) coupled with GC/MS. Maximum particulate dimethyl trisulfide (DMTS, 69.6 ng/L) exceeded its odor threshold concentrations (OTC, 10 ng...
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PMID: 21056900
PDF is available here.
PDF is available here.
Abstract
Disulfide bond engineering is an important approach to improve the metabolic half-life of cysteine-containing peptides. Eleven analogues of oxytocin were synthesized including disulfide bond replacements by thioether, selenylsulfide, diselenide, and ditelluride bridges, and their stabilities in huma...
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PMID: 21117646
PDF is available here.
PDF is available here.
Abstract
Salt cress (Thellungiella salsuginea also known as T. halophila) is a wild cruciferous extremophile highly resistant to salt, drought, and cold. The recent discovery that salt cress produces the phytoalexins wasalexins A and B, and the phytoanticipins 1-methoxyglucobrassicin and 4-methoxyglucobrassi...
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PMID: 20848032
PDF is available here.
PDF is available here.
Abstract
We report Δ(34)S values exceeding 50‰ from a terrestrial Mesoproterozoic (1.18 Gyr old) succession in Scotland, a time period that is at present poorly characterized. This level of fractionation implies disproportionation in the sulphur cycle, probably involving sulphide-oxidizing bacteria, tha...
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PMID: 21068840
PDF is available here.
PDF is available here.
Chemical Communications (46)40 2010
Abstract
β-Cyclodextrin-flavin conjugates are highly efficient catalysts for the sulfoxidation of methyl phenyl sulfides with hydrogen peroxide in neat aqueous media operating at loadings down to 0.2 mol% and allowing for enantioselectivities up to 80% ee.
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PMID: 20835467
PDF is available here.
PDF is available here.
Chemical Communications (46)40 2010
Abstract
We report the synthesis of highly active NiS/CdS photocatalysts via a simple hydrothermal loading method for H(2) evolution from lactic acid sacrificial solution under visible light. In the absence of noble metals, a high quantum efficiency of 51.3% was measured at 420 nm.
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PMID: 20848040
PDF is available here.
PDF is available here.
Abstract
We have used different computational methods, including B3LYP, CCSD(T)-F12 and CBS-QB3, to study and compare the addition-elimination reaction of the nitrate radical NO(3) with four sulfur-containing species relevant to atmospheric chemistry: hydrogen sulfide (H(2)S), dimethyl sulfide [(CH(3))(2)S],...
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PMID: 20820564
PDF is available here.
PDF is available here.
Abstract
A fluorescent probe for mercury(II) ions, based on the quenching of fluorescence of terbium(III) ions doped in CdS nanoparticles, has been developed. The terbium(III)-doped cadmium sulfide composite nanoparticles were successfully synthesized through a straightforward one-pot process, with the biomo...
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PMID: 20663708
PDF is available here.
PDF is available here.
Abstract
We find that the equilibrium morphology is characterised by {220} facets, irrespective of the size of the particle, but that the presence of different high energy facets introduced kinetically may significantly influence the zinc blende to amorphous ZnS transformation size, as well as the agglomerat...
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PMID: 20820648
PDF is available here.
PDF is available here.
Abstract
The bleaching of Congo red was studied in the presence of zinc sulphide nanoparticles doped with Co2+ ion. The nanoparticles of zinc sulphide, doped with cobalt, were synthesized by controlled coprecipitation in the presence of mercaptoethanol as a capping agent. The characterization of nanoparticle...
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PMID: 21046948
PDF is available here.
PDF is available here.
Abstract
To isolate and characterize an anaerobic bacterial strain from the deeper polluted lagoon sediment able to use as electron acceptors [As(V)] and sulfate (SO4(2-)), using lactate as an electron donor.
Methods for isolation from polluted lagoon sediments included anaerobic enrichment cultures in the p...
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PMID: 20860773
PDF is available here.
PDF is available here.
Abstract
We investigated by real time RT-PCR the dependence of expression levels of MET3, MET5/ECM17, MET10, MET16 and MET17 along with SSU1 on nitrogen availability in two wine yeast strains that produce divergent sulfide profiles. MET3 was the most highly expressed of the genes studied in strain PYCC4072,...
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PMID: 20890097
PDF is available here.
PDF is available here.
Optics Express (18)18 2010
Abstract
We demonstrate an optical gain of ~200 cm(-1) for the mode under consideration, which corresponds to ~32% compensation of SPP loss....
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PMID: 20940755
PDF is available here.
PDF is available here.
Abstract
Blinking of zinc blende CdSe-based core/shell nanocrystals is studied as a function of shell materials and surface ligands. CdSe/ZnS, CdSe/ZnSe/ZnS and CdSe/CdS/ZnS core/shell nanocrystals are prepared by colloidal synthesis and six monolayers of larger bandgap shell materials are grown over the CdS...
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PMID: 20607188
PDF is available here.
PDF is available here.
Anticancer Research (30)9 2010
Abstract
The anticancer activity of sulforaphane is known to be mediated at least partly by apoptosis induction and associated with the presence of the -N=C=S moiety. The present study explored how oxidation of sulphur in the side chain of sulforaphane affected apoptosis induction to provide the chemical bas...
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PMID: 20944144
PDF is available here.
PDF is available here.
Chemical Communications (46)31 2010
Abstract
Under microwave radiation, Ag(+)-doped CdS semiconductor nanocrystals with high photoluminescence quantum yield (approximately 58%) and a surprisingly large optical window (480 to 630 nm) are formed controllably using a center-doping strategy and are optimized through a green approach in pure water...
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PMID: 20593082
PDF is available here.
PDF is available here.
Abstract
We investigated the influence of sodium sulfide (Na2S), a liquid hydrogen sulfide donor, on resuscitability, postresuscitation hemodynamics, and neurological performance in a porcine model of prolonged CA and cardiopulmonary resuscitation. Twenty-four male pigs were instrumented with arterial and pu...
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PMID: 20090564
PDF is available here.
PDF is available here.
Abstract
We show that dimethyl sulfoxide (DMSO) inhibits Salmonella hilA expression and that this inhibition is stronger under anaerobiosis. Because DMSO can be reduced to dimethyl sulfide (DMS) during anaerobic growth, we hypothesized that DMS was responsible for hilA inhibition. Indeed, DMS strongly inhibi...
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PMID: 20562287
PDF is available here.
PDF is available here.
Advanced Materials (FRG) (22)29 2010
Abstract
Nanotechnology (21)29 2010
Abstract
We attribute to the size-selective sieving effect of CNTs. By controlling the terminating point for the flow of QDs across the CNT array, a QD size specific CNT/QD hybrid structure is achieved....
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PMID: 20585170
PDF is available here.
PDF is available here.
Zhonghua Yixue Zazhi (90)28 2010
Abstract
To investigate the effect of allitridin on murine cytomegalovirus (MCMV) induced regulatory T cells (Treg) amplification in vitro.
A co-culture system of T cells and MCMV infected mouse embryo fibroblasts (MEF) was established. A maximum tolerance concentration (MTC) of allitridin was added into the...
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PMID: 20979868
PDF is available here.
PDF is available here.
Abstract
We find that the preservation of mass-independent sulfur is influenced by a variety of extra-atmospheric mechanisms, including biological activity and continental crust formation. Preservation of atmospherically produced mass-independent sulfur implies limited metabolic sulfur cycling before approxi...
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PMID: 20508089
PDF is available here.
PDF is available here.
Abstract
A highly sensitive and selective photoelectrochemical sensor for Cu(2+) was developed based on the selective interaction between CdS quantum dots (QDs) immobilized on an indium tin oxide (ITO) electrode surface and Cu(2+) in a triethanolamine (TEA) solution to form Cu(x)S-doped CdS QDs, which disrup...
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PMID: 20648335
PDF is available here.
PDF is available here.
Abstract
We demonstrate doping of nanocrystalline CdS thin films with Co ions by ion implantation at an elevated temperature of 573 K. The modifications caused in structural and optical properties of these films are investigated. Co-doping does not lead to amorphization or formation of any secondary phase pr...
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PMID: 20648342
PDF is available here.
PDF is available here.
Abstract
ZnS : Cu,Cl/ZnS core-shell nanocrystals (NCs) have been synthesized via a facile aqueous synthesis method. The shell growth of the NCs was observed via a red-shift in the UV-Vis absorption spectra with increasing NC size. The Cu photoluminescence (PL) emission was enhanced by capping with a thin ZnS...
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PMID: 20648352
PDF is available here.
PDF is available here.
Abstract
Quantum dot-sensitized solar cells based on Zn-doped TiO(2) (Zn-TiO(2)) film photoanode and polysulfide electrolyte were fabricated. Zn-TiO(2) nanoparticles were obtained via a hydrothermal method and screen printed on the fluorine-doped tin oxide glass to prepare the photoanode. The structure, morp...
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PMID: 20648354
PDF is available here.
PDF is available here.
Abstract
We combined DsrAB gene sequencing and sulfur isotopic profiling to identify the phylogeny and distribution of SRB and to assess their metabolic activity in salt marsh sediments exposed to acid mine drainage (AMD) for over 100 years. Recovered dsrAB sequences from three sites sampled along an AMD flo...
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PMID: 20472728
PDF is available here.
PDF is available here.
Abstract
Synthesis of cadmium sulfide (CdS) nanocrystallites has been performed through the microwave (MW) assisted reaction of cadmium acetate with thiourea in N,N-dimethylformamide (DMF) in the presence of two capping agents, 1-butanethiol and 2-mercaptoethanol. Attempts were made to control the size and s...
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PMID: 20362490
PDF is available here.
PDF is available here.
Archives of Microbiology (192)7 2010
Abstract
Acidithiobacillus ferrooxidans is a mesophilic, acidophilic, chemolithoautotrophic bacterium that obtains energy from the oxidation of ferrous iron (Fe2+), elemental sulfur and reduced sulfur compounds. The industrial interest in A. ferrooxidans resides in its capacity to oxidize insoluble metal sul...
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PMID: 20480358
PDF is available here.
PDF is available here.
Abstract
5-Lipoxygenase (LOX) is an important arachidonic acid-metabolizing enzyme producing leukotrienes and other proinflammatory lipid mediators with potent pathophysiological functions in asthma and other inflammatory diseases. 4-(3-(4-(1-Methyl-1H-pyrazol-5-yl)phenylthio)phenyl)-tetrahydro-2H-pyran-4-ca...
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PMID: 20378715
PDF is available here.
PDF is available here.
Abstract
The effects of nitrate on the stability of reduced, immobilized uranium were evaluated in field experiments at a U.S. Department of Energy site in Oak Ridge, TN. Nitrate (2.0 mM) was injected into a reduced region of the subsurface containing high levels of previously immobilized U(IV). The nitrate...
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PMID: 20527772
PDF is available here.
PDF is available here.
Nanotechnology (21)25 2010
Abstract
We generate highly monodisperse ZnS and CdZnS shells on CdSe semiconductor nanocrystals at temperatures as low as 65 degrees C by enhancing the precursor solubility. Relatively small amounts of trioctylphosphine and trioctylphosphine oxide have marked effects on the solubility of the metal salts use...
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PMID: 20516578
PDF is available here.
PDF is available here.
Abstract
We identified an unexpected reaction to pyridinylimidazol-2-ones. 2-Alkylsulfanylimidazoles, bearing a 2-hydroxyethyl or a 2,3-dihydroxypropyl moiety at the imidazole C2-S position, were converted by heating into imidazol-2-ones. These imidazol-2-ones were tested for their ability to inhibit p38alph...
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PMID: 20481631
PDF is available here.
PDF is available here.
Abstract
We used hydrophilic polymers from diapers to aid the establishment of an indigenous plant (Spergularia purpurea (Persoon) G. Don fil.) in a soil from a pyrite mine. Lysimeters were filled with the mine soil with no amendment (control), with a polyacrylate polymer, with a polymer removed from diapers...
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PMID: 20207477
PDF is available here.
PDF is available here.
Abstract
The safe mining of sulfide ores requires knowledge of the stability/reactivity of the ores under a variety of conditions. This is a large part due to the oxidative self-heating behavior of these ores. In this study, an advanced kinetic simulation approach was used to evaluate the oxidative self-heat...
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PMID: 20353880
PDF is available here.
PDF is available here.
Journal of Hazardous Materials (178)1-3 2010
Abstract
Biological removal of sulfide, nitrate and chemical oxygen demand (COD) simultaneously from industrial wastewaters to elementary sulfur (S(0)), N(2), and CO(2), or named the denitrifying sulfide (DSR) process, is a cost effective and environmentally friendly treatment process for high strength sulfi...
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PMID: 20167423
PDF is available here.
PDF is available here.
Abstract
We investigated the effect of H2S on plasma renin activity and BP in rat models of renovascular hypertension. In the two-kidney-one-clip (2K1C) model of renovascular hypertension, the H2S donor NaHS prevented and treated hypertension. Compared with vehicle, NaHS significantly attenuated the elevatio...
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PMID: 20360313
PDF is available here.
PDF is available here.
Abstract
We identified the two key enzymes, CBS and CSE, for H(2)S synthesis in HCT 116 cells. An exogenously administered H(2)S donor NaHS induced cell proliferation in a concentration-dependent manner, with optimal proliferative concentration at 200 micromol/l. NaHS administration increased Akt and ERK pho...
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PMID: 20184555
PDF is available here.
PDF is available here.
Medical Oncology (27)2 2010
Abstract
We first applied transdermal drug delivery system to deliver realgar nanoparticles to investigate its anticancer effect and toxicity in vivo. In this study, MTT assay and flow cytometry analysis demonstrated that realgar significantly suppressed the proliferation and induced apoptosis of B16 melanom...
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PMID: 19280372
PDF is available here.
PDF is available here.
Chemical Communications (46)20 2010
Abstract
Copper sulfide amorphous nanoparticles and nanocrystals were prepared successfully by a special process. These CuS nanoparticles could specifically and significantly induce the apoptosis and inhibit the proliferation of human cancer cells rather than normal cells. Moreover, the biological activities...
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PMID: 20376385
PDF is available here.
PDF is available here.
Abstract
We used cadmium sulfate hydrate (CdSO(4).8/3H(2)O), elemental S and Se. Aqueous solutions of NaOH, Na(2)SO(3) and EDTA were used as the solvents. During the syntheses, we used a direct immersion ultrasound probe by vibracell. The device operates with a constant frequency of 20 kHz, with the possibil...
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PMID: 20045661
PDF is available here.
PDF is available here.
Microbiology (156)Pt 6 2010
Abstract
We show here that this enzyme is a DMSP lyase that cleaves DMSP to DMS plus acrylate. DddP forms a functional homodimeric enzyme, has a pH optimum of 6.0 and was a K(m) of approximately 14 mM for the DMSP substrate. DddP belongs to the M24B family of peptidases, some members of which have metal cofa...
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PMID: 20378650
PDF is available here.
PDF is available here.
Abstract
The uptake of uranium(VI) by natural pyrite, FeS(2), was studied under conditions relevant for geological disposal of radioactive waste (anoxic atmosphere, approximately 0.014 mol.L(-1) NaHCO(3) electrolyte) with special emphasis on the role of dissolved organic matter. Solution analysis of batch ex...
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PMID: 20438072
PDF is available here.
PDF is available here.
Journal of Bacteriology (192)12 2010
Abstract
Roseiflexus sp. strains were cultivated from a microbial mat of an alkaline siliceous hot spring in Yellowstone National Park. These strains are closely related to predominant filamentous anoxygenic phototrophs found in the mat, as judged by the similarity of small-subunit rRNA, lipid distributions,...
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PMID: 20363941
PDF is available here.
PDF is available here.
Abstract
We were able to follow zinc sulfide particle formation on time scales down to 10(-5) s. The flow cell was designed in such a way that data acquisition on the microsecond time scale was possible under steady-state conditions along a liquid jet (tubular reactor concept), allowing SAXS data accumulatio...
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PMID: 20426411
PDF is available here.
PDF is available here.
Abstract
The red photoluminescence of Mn dopants in MnS-CdS heteronanostructures has been observed for the first time. The red photoluminescence at 650 nm derives from emission due to the (4)T(1) --> (6)A(1) transition of Mn(2+) dopants in a CdS matrix exposed to gigapascal-level lattice stress. HRTEM, FFT,...
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PMID: 20426408
PDF is available here.
PDF is available here.
Abstract
We demonstrated herein a newly developed photoelectrochemical cell-sensor for the determination of SMMC-7721 human hepatoma carcinoma cells (SMMC-7721 cells) by using a photosensitive CdS-polyamidoamine (G4) nano-composite film (CdS-PAMAM). The film was generated by electrodeposition method. The pre...
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PMID: 20181470
PDF is available here.
PDF is available here.
Chemical Communications (46)18 2010
Abstract
Synthesis of paramagnetic gadolinium monosulfide nanoparticles at low temperature is achieved using dextrose ligands.
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PMID: 20424754
PDF is available here.
PDF is available here.
Abstract
Thiol-Olefin Co-Oxygenation (TOCO) methodology has been applied to the synthesis of a small library of weak base and polar 1,2,4-trioxanes. The 1,2,4-trioxane units synthesised exhibit remarkable stability as they survive base catalysed hydrolysis and mixed anhydride/amine coupling reactions. This u...
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PMID: 20401383
PDF is available here.
PDF is available here.
Abstract
It is not known whether H(2)S can promote angiogenesis with improvement of regional blood flow in ischemic organs. Sodium hydrosulfide (NaHS, a H(2)S donor) was administered once a day for 4 w following femoral artery ligation. Collateral vessel growth, capillary density, regional tissue blood flow,...
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PMID: 19842913
PDF is available here.
PDF is available here.
Abstract
These results demonstrate that storage of oil field water samples for 14 days, such as might occur because of lengthy transport times or delays before analysis in the laboratory, can affect microbial numbers and activity as well as water sample chemistry....
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PMID: 20186564
PDF is available here.
PDF is available here.
Abstract
We hypothesized that these abnormalities are mainly mediated by oxidative stress, endothelial dysfunction and impaired intracellular communications. Thus, we examined vasoactivity and expression of connexin (Cx) 43 and 40, protein kinase C-epsilon (PKCepsilon) and NADPH oxidase of the vasculature of...
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PMID: 20609064
PDF is available here.
PDF is available here.
Abstract
We demonstrate the synthesis of near-IR-emitting zinc blende CdTe/CdS tetrahedral-shaped nanocrystals with a magic-sized (approximately 0.8 nm radius) CdTe core and a thick CdS shell (up to 5 nm). These high-quality water-soluble nanocrystals were obtained by a simple but reliable aqueous method at...
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PMID: 20364822
PDF is available here.
PDF is available here.
Abstract
Iminoazophenol appended calix[4]arene/thiacalix[4]arene derivatives 1 and 2 of cone and 3 of 1,3-alternate conformation have been synthesized and examined for their chromogenic anion recognition abilities towards different anions like fluoride, chloride, bromide, iodide, acetate, dihydrogenphosphate...
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PMID: 20188879
PDF is available here.
PDF is available here.
Abstract
A simple and facile synthetic method to incorporate copper sulfide (Cu(2)S) nanoparticles inside the mesopores of ordered mesoporous carbons (OMCs) is reported. The Cu(2)S/OMCs nanocomposite was characterized by transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray photoelectron spe...
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PMID: 20188929
PDF is available here.
PDF is available here.
Abstract
Glutathione (GSH)-capped CdS nanoparticles was successfully synthesized in aqueous solutions at room temperature. Based on the characteristics of synchronous fluorescence spectroscopy (SFS), a simple method with high sensitivity and selectivity was developed for determination of Hg(2+) with GSH-capp...
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PMID: 20188943
PDF is available here.
PDF is available here.