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3,267 Newest Publications about the topic sulfur

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Storage Life of Field-Grown Garlic Bulbs (Allium sativum L.) as Influenced by Nitrogen and Sulfur Fertilization

30-Mar-2011 | Elke Bloem; Silvia Haneklaus; Ewald Schnug, Journal of Agricultural and Food Chemistry, 2011

The most important active compound in garlic is alliin. Sulfur (S) fertilization was shown to significantly increase the alliin concentration in garlic cloves, while high nitrogen (N) levels had an adverse effect. The effect of graded N and S application on the storage life of garlic has been ...

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Thermal‐gradient‐induced non‐mass‐dependent isotope fractionation

30-Mar-2011 | Sun, Tao; Bao, Huiming, Rapid Communications in Mass Spectrometry, 2011

Abstract Isotope fractionation resulting from gas diffusion along a thermal gradient has always been considered entirely mass‐dependent. A previous report, however, showed that non‐mass‐dependent 17O anomalies can be generated simply by subjecting O2 gas in an enclosure to a thermal gradient. ...

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Sandwich-type functionalized graphene sheet-sulfur nanocomposite for rechargeable lithium batteries

30-Mar-2011 | Yuliang Cao; Xiaolin Li; Ilhan A. Aksay; John Lemmon; Zimin Nie; Zhenguo Yang; Jun Liu, Physical Chemistry Chemical Physics, 2011

A functionalized graphene sheet-sulfur (FGSS) nanocomposite was synthesized as the cathode material for lithium–sulfur batteries. The structure has a layer of functionalized graphene sheets/stacks (FGS) and a layer of sulfur nanoparticles creating a three-dimensional sandwich-type architecture. ...

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A comparative study of the hydrogen-bonding patterns and prototropism in solid 2-thiocytosine (potential antileukemic agent) and cytosine, as studied by 1H-14N NQDR and QTAIM/ DFT

29-Mar-2011 | Jolanta N. Latosińska, Janez Seliger, Veselko Žagar, Dorota V. Burchardt, Journal of Molecular Modeling, 2011

A potential antileukemic and anticancer agent, 2-thiocytosine (2-TC), has been studied experimentally in the solid state by 1H-14N NMR-NQR double resonance (NQDR) and theoretically by the quantum theory of atoms in molecules (QTAIM)/density functional theory (DFT). Eighteen resonance frequencies ...

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Deep Fuels Desulfurization and Denitrogenation Using 1-Butyl-3-methylimidazolium Trifluoromethanesulfonate

29-Mar-2011 | Karolina Kȩdra-Krolik; Fabrice Mutelet; Jean-Charles Moïse; Jean-Noël Jaubert, Energy & Fuels, 2011

The aim of this study is to investigate the possible use of 1-butyl-3-methylimidazolium trifluoromethanesulfonate ([BMIM][OTf]) as solvent for three separation tasks which appear in deep desulfurization of fuels: {aromatic sulfur compound + aliphatic hydrocarbon}, {nitrogen compound + aliphatic ...

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A Multiperiod Mathematical Model for Integrating Planning and SO2 Mitigation in the Power Generation Sector

29-Mar-2011 | Mohammed S. Ba-Shammakh, Energy & Fuels, 2011

The power generation sector contributes directly to SO2 emissions, causing economic and environmental damage. These SO2 emissions come mostly from the combustion of fossil fuels for power generation. A multiperiod mixed-integer nonlinear model for power generation planning with SO2 consideration ...

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Land Use Regression Modeling To Estimate Historic (1962−1991) Concentrations of Black Smoke and Sulfur Dioxide for Great Britain

29-Mar-2011 | John Gulliver; Chloe Morris; Kayoung Lee; Danielle Vienneau; David Briggs; Anna Hansell, Environmental Science & Technology, 2011

Land-use regression modeling was used to develop maps of annual average black smoke (BS) and sulfur dioxide (SO2) concentrations in 1962, 1971, 1981, and 1991 for Great Britain on a 1 km grid for use in epidemiological studies. Models were developed in a GIS using data on land cover, the road ...

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Cyclic Sulfur Ylides Derived from Gleason-Type Chiral Auxiliaries for the Asymmetric Synthesis of Epoxy Amides

29-Mar-2011 | Francisco Sarabia; Carlos Vivar-García; Miguel García-Castro; Jorge Martín-Ortiz, The Journal of Organic Chemistry, 2011

The Journal of Organic Chemistry DOI: 10.1021/jo1025964

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ChemInform Abstract: Ga(OTf)3‐Catalyzed Direct Substitution of Alcohols with Sulfur Nucleophiles.

29-Mar-2011 | Han, Xinping; Wu, Jimmy, ChemInform, 2011

Abstract The only by‐product in the process is water.

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Intramolecular homolytic substitution of sulfinates and sulfinamides – a computational study

29-Mar-2011 | Sara H. Kyne; Heather M. Aitken; Carl H. Schiesser; Emmanuel Lacôte; Max Malacria; Cyril Ollivier; Louis Fensterbank, Organic & Biomolecular Chemistry, 2011

Ab initio and density functional theory (DFT) calculations predict that intramolecular homolytic substitution by alkyl radicals at the sulfur atom in sulfinates proceeds through a smooth transition state in which the attacking and leaving radicals adopt a near collinear arrangement. When forming ...

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