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4,642 Newest Publications about the topic sulfur

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Identification of an 8-vinyl reductase involved in bacteriochlorophyll biosynthesis in Rhodobacter sphaeroides and evidence for the existence of a third distinct class of the enzyme

01-Mar-2013 | Canniffe DP; Jackson PJ; Hollingshead S; Dickman MJ; Hunter CN, Biochemical Journal, 2013

The purple phototrophic bacterium Rhodobacter sphaeroides utilises bacteriochlorophyll a for light harvesting and photochemistry. The synthesis of this photopigment includes the reduction of a vinyl group at the C8 position to an ethyl group, catalysed by a C8-vinyl reductase. An active form of ...

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Effect of Nitrogen and Sulfur Fertilization on Accumulation Characteristics and Physicochemical Properties of A- and B-Wheat Starch

01-Mar-2013 | Wenhao Li; Yulin Shan; Xinlong Xiao; Jianmei Zheng; Qingui Luo; Shaohui Ouyang; Guoquan Zhang, Journal of Agricultural and Food Chemistry, 2013

The effects of nitrogen (N) fertilization at the rates of 0 and 230 kg hm–2 combined with selected sulfur (S) fertilization rates of 0, 46, 56, 77, and 115 kg hm–2 on A- and B-wheat starch granule accumulation, composition, and thermal and pasting properties were investigated. Scanning electron ...

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Encapsulation of Sulfur in a Hollow Porous Carbon Substrate for Superior Li‐S Batteries with Long Lifespan

28-Feb-2013 | Sen Xin, Ya‐Xia Yin, Li‐Jun Wan, Yu‐Guo Guo, Particle & Particle Systems Characterization, 2013

A hollow carbon substrate is prepared via a simple hydrothermal method with sulfonated polystyrene sphere as the template. A sulfur‐carbon composite based on the carbon substrate shows a high electrochemical activity, an ultralong lifespan (255 days, 600 cycles), and a favorable rate capability ...

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Desulfurization Characteristics of Rapidly Hydrated Sorbents with Various Adhesive Carrier Particles for a Semidry CFB-FGD System

28-Feb-2013 | Changfu You; Yuan Li, Environmental Science & Technology, 2013

Semidry flue gas desulfurization (FGD) experiments were conducted using rapidly hydrated sorbents with four different adhesive carrier particles: circulation ash from a circulating fluidized bed boiler (CFBB circulation ash), fly ash from the first electrical field of the electrostatic ...

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Nucleophilic ortho‐Propargylation of Aryl Sulfoxides: An Interrupted Pummerer/Allenyl Thio‐Claisen Rearrangement Sequence

27-Feb-2013 | Andrew J. Eberhart, David J. Procter, Angewandte Chemie International Edition, 2013

A new direction: The nucleophilic ortho‐propargylation of aryl sulfoxides exploits intermolecular delivery of the nucleophile to sulfur followed by an intramolecular relay to carbon (see scheme). The simple, metal‐free procedure is general, regiospecific with regard to the propargyl ...

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X-ray Absorption Spectroscopy of a Quantitatively Mo(V) Dimethyl Sulfoxide Reductase Species

27-Feb-2013 | M. Jake Pushie; Julien J. H. Cotelesage; Ganna Lyashenko; Russ Hille; Graham N. George, Inorganic Chemistry, 2013

Molybdenum K-edge X-ray absorption spectroscopy (XAS) has been used to probe the structure of a Mo(V) species that has been suggested to be a catalytic intermediate in the reaction of dimethyl sulfoxide (DMSO) reductase with the alternative substrate trimethylamine N-oxide (Bennet et al. Eur. J. ...

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A Molecular Dynamics and Quantum Mechanics/Molecular Mechanics Study of the Catalytic Reductase Mechanism of Methionine Sulfoxide Reductase A: Formation and Reduction of a Sulfenic Acid

27-Feb-2013 | Hisham M. Dokainish; James W. Gauld, Biochemistry, 2013

The catalytic mechanism of MsrA in Mycobacterium tuberculosis, in which S-methionine sulfoxide (Met-O) is reduced to methionine (Met), has been investigated using docking, molecular dynamics (MD) simulations, and ONIOM (quantum mechanics/molecular mechanics) methods. In addition, the roles of ...

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Evaluation of Sulfur Dioxide Poisoning for LSCF Cathodes

25-Feb-2013 | Dr. F. Wang, K. Yamaji, D.‐H. Cho, T. Shimonosono, M. Nishi, H. Kishimoto, M. E. Brito, T. Horita, H. Yokokawa, Fuel Cells, 2013

Abstract Sulfur poisoning behavior of La0.6Sr0.4Co0.2Fe0.8O3–δ (LSCF6428) cathode was investigated at T = 1073 K (800 °C) under 0.1 ppm of SO2‐air mixture gas; the amount of supplied SO2 was controlled by changing the flow rate. Two stages of the performance degradation were found: a rapid ...

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Review: In vitro biofilm models for studying oral malodour

25-Feb-2013 | John Greenman, Saliha Saad, Keith Hewett, Robin M. S. Thorn, Darren M. Reynolds, Flavour and Fragrance Journal, 2013

ABSTRACT Most cases of oral malodour are thought to be due to microbial biofilms that form in the pits and fissures that exist on the dorsum of the tongue. The tongue microflora is mainly fed by saliva, but nutrient sources could also include exfoliated mammalian cells and tissue fluid (e.g. ...

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Influence of Feedstock on the Release of Potassium, Sodium, Chlorine, Sulfur, and Phosphorus Species during Gasification of Wood and Biomass Shells

21-Feb-2013 | Marc Bläsing; Mostafa Zini; Michael Müller, Energy & Fuels, 2013

The objective of this work was to investigate the influence of feedstock on the release of trace elements during gasification. Therefore, different types of woody biomass and biomass residues (shells) were thermochemically converted in an atmospheric flow channel reactor furnace at different ...

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