Citations with the tag: SULFUR compounds

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  • Chemical profile.
     // Chemical Market Reporter; 1/27/97, Vol. 251 Issue 4, p41 

    Provides information on the chemical phosphorus pentasulfide. Demand; Growth; Price; Uses.

  • Environmental chemistry: Complex reaction patterns of some selected sulfur compounds in aqueous...
    Chinake, Cordelia R.; Simoyi, Reuben H. // South African Journal of Chemistry; Jun95, Vol. 48 Issue 1/2, p1 

    Studies the reaction patterns of selected sulfur compounds in aqueous and gaseous mixtures. Background on the study; Sulfur chemistry; Sulfur in the atmosphere; Non-linear kinetics; Chemical instabilities; Spatial inhomogeneities.

  • disulfate.
    Chinake, Cordelia R.; Simoyi, Reuben H. // Taber's Cyclopedic Medical Dictionary (2009); 2009, Issue 21, p676 

    A definition of the term "disulfate" which refers to a compound containing two sulfate radicals is presented.

  • sulfide.
    Chinake, Cordelia R.; Simoyi, Reuben H. // Taber's Cyclopedic Medical Dictionary (2009); 2009, Issue 21, p2237 

    A definition of the term "sulfide," which refers to any compound of sulfur that has an element or base, is presented.

  • sulfone.
    Chinake, Cordelia R.; Simoyi, Reuben H. // Taber's Cyclopedic Medical Dictionary (2009); 2009, Issue 21, p2237 

    A definition of the term "sulfone," which refers to an oxidation product of sulfur compound in which sulfur dioxide (SO)2 is combined with two hydrocarbon radicals, is presented.

  • sulforaphane, sulphoraphane.
    Chinake, Cordelia R.; Simoyi, Reuben H. // Taber's Cyclopedic Medical Dictionary (2009); 2009, Issue 21, p2237 

    A definition of the terms "sulforaphane" and "sulphoraphane," which refer to a sulfur-containing compound that can be found in vegetables of the mustard or Cruciferae family, is presented.

  • Promoting the Biological Oxidation of Reduced Sulphur Compounds by pH Adjustment in a High Temperature Membrane Bioreactor Treating Kraft Pulp Mill Foul Condensate.
    Bérubé, Pierre R.; Hall, Eric R. // Water Quality Research Journal of Canada; 2001, Vol. 36 Issue 1, p104 

    Over 99% of the reduced sulphur compounds (RSC) contained in a synthetic foul evaporator condensate were removed during treatment using a high temperature membrane bioreactor (MBR). At a neutral pH, the removal of the RSC was entirely due to stripping by the aeration system. It was possible to...

  • New standards from PolyScience.
    Bérubé, Pierre R.; Hall, Eric R. // DCI; May96, Vol. 158 Issue 5, p100 

    Reports on PolySciences' addition of sulphur compounds to its product line of organic analytical standards. Kits of neat mercatans and sulfide compounds; Standards for identifying odors and fragrances in cosmetics.

  • Fourier-transform microwave spectrum, structure, harmonic force field, and hyperfine constants of...
    Preusser, Jurgen; Gerry, Michael C.L. // Journal of Chemical Physics; 6/22/1997, Vol. 106 Issue 24, p10037 

    Studies the Fourier-transform microwave spectrum, structure, harmonic force field and hyperfine constants of sulfur chloride fluoride ClSF. Observed spectra and analysis; Preparation of the sample molecule using a pulsed electrical discharge; Use of the data to determine structural parameters;...

  • H[sub 2]S adsorption on chromium, chromia, and gold/chromia surfaces: Photoemission studies.
    Rodriguez, J.A.; Chaturvedi, S.; Kuhn, M.; van ek, J.; Diebold, U.; Robbert, P.S.; Geisler, H.; Ventrice Jr., C.A. // Journal of Chemical Physics; 12/1/1997, Vol. 107 Issue 21, p9146 

    Studies the adsorption of the sulphur compound H[sub 2]S on clean and gold 'promoted' oxides of chromium. Chemisorbed layer produced by the decomposition of H[sub2]S on polycrystalline chromium; Rate of dissociation; Correlation between the size of the band gap in the oxide and its reactivity...

  • Magnetic properties in terms of localized quantities. XII. Normal- and hypervalent sulfur compounds.
    Schindler, Michael // Journal of Chemical Physics; 6/15/1988, Vol. 88 Issue 12, p7638 

    Magnetic susceptibility and NMR chemical shift tensors are calculated for a number of sulfur containing compounds by means of the IGLO method (IGLO stands for individual gauge for localized molecular orbitals). The molecules investigated are H2S, the normal- and hypervalent sulfur fluorides SF2,...

  • Reorientational motion of the HS[sup -] ions in hydrogensulfides of alkali metals (NaHS, KHS, RbHS): A quasielastic neutron scattering study.
    Haarmann, F.; Jacobs, H.; Asmussen, B.; No¨ldeke, C.; Kearley, G. J.; Combet, J. // Journal of Chemical Physics; 11/8/2000, Vol. 113 Issue 18 

    The isostructural hydrogensulfides of the alkali metals sodium, potassium, and rubidium were investigated by quasielastic neutron scattering in order to gain insight into the dynamics of the molecular anion HS[sup -] as a function of temperature. A phase transition between the rhombohedral...

  • Identification of iron sulphide grains in protoplanetary disks.
    Keller, L.P.; Hony, S.; Bradley, J.P.; Molster, F.J.; Waters, L.B.F.M.; Bouwman, J.; de Koter, A.; Brownlee, D.E.; Flynn, G.J.; Henning, T.; Mutschke, H. // Nature; 5/9/2002, Vol. 417 Issue 6885, p148 

    Identifies iron sulphide grains in protoplanetary disks. Reduction of sulphur in cold dense molecular clouds; Characteristics of pyrrhotite; Mechanism of iron sulphide destruction.

  • Magnetic and transport properties of CuCr[sub 1-x]V[sub x]S[sub 2] compounds.
    Al’mukhametov, R. F.; Yakshibaev, R. A.; Gabitov, É. V. // Physics of the Solid State; Aug99, Vol. 41 Issue 8, p1327 

    A comparison of experimental and calculated effective magnetic moments shows that the sulfur in CuCr[sub 1-x]V[sub x]S[sub 2] compounds has two different oxidation states, S[sup 1-] and S[sup 2-], while the vanadium has a higher degree of oxidation (V[sup 3+]) than the chromium (Cr[sup 2+]). A...

  • Live long with leeks and berries.
    Errey, Sally // Alive: Canada's Natural Health & Wellness Magazine; Nov2003, Issue 253, p136 

    Introduces soup recipes containing sulphur compounds that help protect against heart disease and cancer.

  • Angular distribution of ionic fragments in the dissociation of SO[sub 2][sup 2+].
    Masuoka, Toshio; Kobayashi, Ataru // Journal of Chemical Physics; 10/22/2000, Vol. 113 Issue 16 

    The photoion-photoion coincidence technique has been used to measure the angular distributions of the O[sup +]+S[sup +] and O[sup +]+SO[sup +] fragments in the dissociative double photoionization of SO[sub 2] in the 37-120 eV range with linearly polarized synchrotron radiation. The present work...

  • Untitled.
    Coyne, Pat // New Statesman & Society; 2/18/94, Vol. 7 Issue 290, p31 

    Discusses the relation between global warming and sulphur pollution. Complexity of the Earth's climatic system; Warming in the hemispheres; Effect of sulphur compounds on the climate; Sulphate cooling; Idea of sulphur pollution as a means to counter global warming.

  • The South Karelia Air Pollution Study: Changes in Respiratory Health in Relation to Emission Reduction of Malodorous Sulfur Compounds from Pulp Mills.
    Jaakkola, Jouni J.K.; Partti-Pellinen, Kirsi // Archives of Environmental Health; Jul/Aug99, Vol. 54 Issue 4, p254 

    Presents information on a study which focused on the health effects of emission reduction of malodorous sulfur compounds air pollutants in Finland. Method; Results; Discussion; Conclusion.

  • Sulfurous vapors emitted from EPDM rubber can damage electronic instruments.
    Hauser, Ray L.; Quick Jr., Allen N. // Rubber World; Aug2001, Vol. 224 Issue 5, p24 

    Examines the effect of sulfurous vapors emitted from EPDM rubber on electronic instruments in the U.S. Confirmation of the possible sources of sulfur vapor; Damage of lubricants and bearing materials of disk drives; Identification of sulfurous compounds.

  • Modifying the performance of sulfenamide accelerators with thiurams.
    Chasar, Dwight W. // Rubber World; Aug2002, Vol. 226 Issue 5, p26 

    Focuses on the modifications of the performance of sulfenamide accelerators with thiurams. Compounds used to reduce the amount of nitrosamines; Comparison of properties of thiurams; Cure rates and scorch times of various commercial thiurams; Reversion characteristics of the thiurams.

  • Sulfur Dioxide Emissions, 1970-2003.
    Chasar, Dwight W. // World Almanac & Book of Facts; 2006, p301 

    A chart is presented that lists estimates of sulfur dioxide emissions in the U.S., during the period 1970-2003.

  • The 2011 World Market Forecasts for Imported Sulfides, Polysulfides, Dithionites, Sulfoxylates, Sulfites, Thiosulfates, Sulfates and Alums.
    Parker, Philip M. // World Trade Reports - Imports; 1/ 2/2010, pN.PAG 

    Several tables and graphs related to the 2011 market forecasts for imported sulfides, polysulfides, dithionites, sulfoxylates, sulfites, thiosulfates, sulfates and alums for countries in Africa, Asia, Europe, Latin America, North America and the Caribbean, Oceana, and the Middle East are presented.

  • The 2011 World Market Forecasts for Imported Dithionites and Sulfoxylates.
    Parker, Philip M. // World Trade Reports - Imports; 1/ 2/2010, pN.PAG 

    Several tables and graphs related to the 2011 market forecasts for imported dithionites and sulfoxylates for countries in Africa, Asia, Europe, Latin America, North America and the Caribbean, Oceana, and the Middle East are presented.

  • The 2011 World Forecasts of Organo-Sulfur Compounds Export Supplies.
    Parker, Philip M. // World Trade Reports - Export Supplies; 1/ 5/2010, pN.PAG 

    Several tables and graphs related to the 2011 forecasts of organo-sulfur compounds export supplies for countries in Africa, Asia, Europe, Latin America, North America and the Caribbean, Oceana, and the Middle East are presented.

  • The 2011 World Forecasts of Sulfides, Polysulfides, Dithionites, Sulfoxylates, Sulfites, Thiosulfates, Sulfates and Alums Export Supplies.
    Parker, Philip M. // World Trade Reports - Export Supplies; 1/ 5/2010, pN.PAG 

    Several tables and graphs related to the 2011 forecasts of sulfides, polysulfides, dithionites, sulfoxylates, sulfites, thiosulfates, sulfates and alums export supplies for countries in Africa, Asia, Europe, Latin America, North America and the Caribbean, Oceana, and the Middle East are presented.

  • The 2011 World Forecasts of Dithionites and Sulfoxylates Export Supplies.
    Parker, Philip M. // World Trade Reports - Export Supplies; 1/ 5/2010, pN.PAG 

    Several tables and graphs related to the 2011 forecasts of dithionites and sulfoxylates export supplies for countries in Africa, Asia, Europe, Latin America, North America and the Caribbean, Oceana, and the Middle East are presented.

  • Isotope Effects in the Vibrational Spectrum of the SF[sub 6] Molecule.
    Kolomiıtsova, T. D.; Kondaurov, V. A.; Sedelkova, E. V.; Shchepkin, D. N. // Optics & Spectroscopy; Apr2002, Vol. 92 Issue 4, p512 

    The IR absorption spectra of solutions of SF[sub 6] in liquid argon are studied at a temperature of 93 K in the concentration interval 10[sup -5]-10[sup -7] mole fractions. A sample with a natural abundance of isotopes and a monoisotope [sup 34]SF[sub 6] sample are studied. The frequencies,...

  • Rings and chains in sulfur cluster anions S- to S9-: Theory (simulated annealing) and experiment (photoelectron detachment).
    Hunsicker, S.; Jones, R. O.; Ganteför, G. // Journal of Chemical Physics; 4/15/1995, Vol. 102 Issue 15, p5917 

    Density functional calculations with simulated annealing have been performed for singly charged anions of sulfur clusters with up to nine atoms. The calculations predict the existence of two classes of structure: open (chain-like) and closed (ring-like), for which the vertical detachment...

  • Photoionization efficiency spectrum and ionization energy of HSO studied by discharge...
    Bing-Ming Cheng; Eberhard, Jurg // Journal of Chemical Physics; 6/15/1997, Vol. 106 Issue 23, p9727 

    Measures the photoionization efficiency spectrum of a hydrogen-sulfur-oxygen (HSO) compound. Application of discharge flow and photoionization mass spectrometer; Radicals generated by reacting O atoms with various organothiol compounds; Derivation of vibrational frequency from the separation of...

  • Vector properties of S([sup 3]P) and S([sup 1]D) in the photodissociation of SH: Quantum interference and overlapping resonance.
    Lee, Sungyul; Sun, Hosung; Kim, Bongsoo; Freed, Karl F. // Journal of Chemical Physics; 6/22/2002, Vol. 116 Issue 24, p10656 

    A quantal analysis is presented for the vector properties of the S(³P) and S(¹D) fragments produced in the photodissociation of SH. We find that several different kinds of effects influence the angular distributions and the alignments of the sulfur atoms. At energies between the thresholds...

  • Magnetic and specific heat studies of the effect of sulfur nonstochiometry in Culr2S4+x (x=-0.1,...
    Somasundaram, P.; Kim, D. // Journal of Applied Physics; 4/16/1997, Vol. 81 Issue 8, p4618 

    Investigates the magnetic properties and the specific heat of sulfur nonstoichimetric CuIr2S4+x (x = -0.1, 0.0, and 0.1). Transition temperatures; Change in entropy.

  • Very low energy electron attachment to SF6 clusters.
    Desfrancois, C.; Khelifa, N.; Schermann, J. P. // Journal of Chemical Physics; 11/1/1989, Vol. 91 Issue 9, p5853 

    Electron attachment to SF6 clusters has been studied in the 6–110 meV range with a crossed pulsed beam experiment using laser excited Rydberg atoms. The width of the very low energy resonance varies with the cluster size.

  • Desulfurization of Tall Oil Rosin.
    Evdokimov, Andrey; Kurzin, Alexander; Popova, Larisa; Trifonova, Alena; Vikhman, Tamara // Journal of the American Oil Chemists' Society (JAOCS); Dec2014, Vol. 91 Issue 12, p2155 

    Tall oil rosin has limited application due to the presence of sulfur compounds. By treatments with acetic acid and 2-ethoxyethanol the total sulfur content of tall oil rosin was reduced from 630 to 48 ppm.

  • Reduced sulfur compounds in the atmosphere of sewer networks in Australia: geographic (and seasonal) variations.
    Wang, B.; Sivret, E. C.; Parcsi, G.; Le, N. M.; Kenny, S.; Bustamante, H.; Stuetz, R. M. // Water Science & Technology; 2014, Vol. 69 Issue 6, p1167 

    The management of odorous emissions from sewer networks has become an important issue for sewer system operators resulting in the need to better understand the composition of reduced sulfur compounds (RSCs). Gaseous RSCs including hydrogen sulfide (H2S), methanethiol (MeSH), dimethyl sulfide...

  • Influence of frequency, pressure, and mixture ratio of electronegative gas on electrical characteristics of rf discharges in N2-SF6 mixtures.
    Kakuta, Shigeru; Petrovic, Zoran Lj.; Tochikubo, Fumiyoshi; Makabe, Toshiaki // Journal of Applied Physics; 10/15/93, Vol. 74 Issue 8, p4923 

    Presents a study that investigated the electrical characteristics of radio frequency discharges in sulfur (S)-fluorine (F) and its mixtures with nitrogen. Use of emission spectroscopy; Importance of radio frequency discharges in SF; Schematic diagram of experimental apparatus and systems.

  • Effects of 0.75ppm Sulfur Dioxide on Pulmonary Function Parameters of Normal Human Subjects.
    Stacy, Ralph W.; House, Dennis; Friedman, Mitchell; Hazucha, Milan; Green, James; Raggio, Louis // Archives of Environmental Health; Jul/Aug81, Vol. 36 Issue 4, p172 

    Examines the effects of 0.75ppm sulfur dioxide on pulmonary function parameters of normal human subjects in Chapel Hill, North Carolina. Derivation of sulfur dioxide; Methods employed in the evaluation of pulmonary function; Importance of ventilation in the identification of the degree of...

    Carvalho, M.; Tabchoury, C.; Cury, J.; Toledo, S.; Nogueira-Filho, C. // Perio Reports Newsletter; Mar2004, Vol. 16 Issue 2, p1 

    Presents a study conducted in Brazil on the role of chlorhexidine in reducing bad breath. Causes of bad breath; Mouth rinses used in the study; Effectiveness of chlorhexidine in reducing volatile sulphur compounds as compared to other disinfectant compounds.

  • Influence des rejets atmosph�riques d'anhydride sulfureux sur la qualit� de l'eau des lacs de la r�gion de Rouyn-Noranda.
    Dupont, J. // Atmosphere -- Ocean (Canadian Meteorological & Oceanographic Soc; Sep1988, Vol. 26 Issue 3, p449 

    In March 1982, the minist�re de l'Environnement du Qu�bec conducted a physicochemical sampling survey in 64 headwater lakes in the Rouyn-Noranda area. The objectives of the study were to determine the lake sensitivity of this area and to demarcate the zone of influence of the biggest...

  • Sulfite oxidase enzyme activity in soil.
    Bilen, Serdar; Dick, Warren // Biology & Fertility of Soils; Aug2011, Vol. 47 Issue 6, p647 

    Several methods for measuring sulfite oxidases (EC and EC have been developed for microbial systems, but none have been systematically adopted for soils. We describe an assay method to measure sulfite oxidase in soil that is based on the use of potassium sulfite (KSO) serving as...

  • Synthesis and properties of end-capped bis(oligothienyl) sulfides.
    Myles, Daniel J. T.; Chahma, M'hamed; Hicks, Robin G. // Canadian Journal of Chemistry; Oct2008, Vol. 86 Issue 10, p982 

    The synthesis, and the optical and electrochemical properties, of a series of mesitylthio (MesS-) end-capped bis(oligothienyl) sulfides are presented. The target compounds were synthesized principally by convergent protocols, whereby a series of short thiophene oligomers bearing one terminal...

  • Electrochemical oxidation of sulfide ion at a boron-doped diamond anode.
    Waterston, Katie; Bejan, Dorin; Bunce, Nigel J. // Journal of Applied Electrochemistry; Mar2007, Vol. 37 Issue 3, p367 

    The goal of the present research was the direct conversion of sulfide, an important contaminant in geothermal brines, to sulfate, whose discharge limits are much less stringent than those for sulfide. By the use of a novel anode material boron-doped diamond (BDD), we achieved near-quantitative...

  • Biological and chemical sulfide oxidation in a Beggiatoa inhabited marine sediment.
    Preisler, Andr�; de Beer, Dirk; Lichtschlag, Anna; Lavik, Gaute; Boetius, Antje; J�rgensen, Bo Barker // ISME Journal: Multidisciplinary Journal of Microbial Ecology; Aug2007, Vol. 1 Issue 4, p341 

    The ecological niche of nitrate-storing Beggiatoa, and their contribution to the removal of sulfide were investigated in coastal sediment. With microsensors a clear suboxic zone of 2�10 cm thick was identified, where neither oxygen nor free sulfide was detectable. In this zone most of the...

  • Influence of [H]-donating activity of hydrocarbons on transformations of thiophene compounds under catalytic cracking conditions.
    Potapenko, O.; Doronin, V.; Sorokina, T. // Petroleum Chemistry; Jan2012, Vol. 52 Issue 1, p55 

    Transformations of 2-methylthiophene and benzothiophene together with n-undecane, declaim, or cumene under conditions of catalytic cracking have been studied. It has been found that enhancement of the [H]-donating activity in the order cumene < n-undecane < decalin leads to an increase in the...

  • Effect of cadmium to sulfur ratio on the photoluminescence of CdS-doped glasses.
    Okamoto, Hideki; Matsuoka, Jun; Nasu, Hiroyuki; Kamiya, Kanichi; Tanaka, Hiroshi // Journal of Applied Physics; 2/15/1994, Vol. 75 Issue 4, p2251 

    Presents a study that examined the luminescence spectra from glasses doped with cadmium (Cd)-sulfur (S) with various Cd to S ratios to determine the origin of the long-wavelength photoluminescence spectra of CdS-doped glasses. Use of melting method and impregnation method; Discussion regarding...

  • Sensitive bromatometric methods for the determination of salbutamol sulphate in pharmaceuticals.
    Somashekar, B.; Basavaiah, K. // Journal of Analytical Chemistry; May2007, Vol. 62 Issue 5, p432 

    The proposed methods allow semimicro and microlevel determination of SBS in authentic samples and in dosage forms. The spectrophotometric method is much more sensitive than most of the procedures known for the determination of SBS. The titrimetric method takes less than 15 min for analysis. All...

  • Mechanism of oxidation of inorganic sulfur compounds by thiosulfate-grown Thiobacillus thiooxidans.
    Masau, Rosemarie Jefferey Y; Oh, Jae Key; Suzuki, Isamu // Canadian Journal of Microbiology; Apr2001, Vol. 47 Issue 4, p348 

    Thiobacillus thiooxidans was grown at pH 5 on thiosulfate as an energy source, and the mechanism of oxidation of inorganic sulfur compounds was studied by the effect of inhibitors, stoichiometries of oxygen consumption and sulfur, sulfite, or tetrathionate accumulation, and cytochrome reduction...

  • Effect of Different Sulphate Types and Concentrations on Compressive Strength of Periwinkle Shell Ash Blended Cement Concrete.
    Umoh, Akaninyene A.; Olusola, Kolapo O. // International Journal of Engineering & Technology; Oct2012, Vol. 12 Issue 5, p10 

    The study investigated the compressive strength performance of periwinkle shell ash (PSA) blended cement concrete exposed to sulphate environments. Periwinkle shells were obtained from Ikot Ekpene, Akwa Ibom state, Nigeria; and calcined in a furnace to temperature of 8000C at zero soaking time....

  • Background Aerosol Properties in the European Arctic.
    Eleftheriadis, K.; Nyeki, S.; Psomiadou, C.; Colbeck, I. // Water, Air & Soil Pollution: Focus; Jul2004, Vol. 4 Issue 4/5, p23 

    Background arctic aerosol properties generally observed during the summer were studied at Ny-Ã…lesund, Svalbard in a six-week campaign where the aerosol size distribution and chemical composition were measured. The results presented here demonstrate the marked difference between the...

  • Acid Rain 2000 — Conference Summary Statement — Looking Back to the Past and Thinking of the Future —.
    Satake, K.; Kojima, S.; Takamatsu, T.; Shindo, J.; Nakano, T.; Aoki, S.; Fukuyama, T.; Hatakeyama, S.; Ikuta, K.; Kawashima, M.; Kohno, Y.; Murano, K.; Okita, T.; Taoda, H.; Tsunoda, K. // Water, Air & Soil Pollution; Aug2001, Vol. 130 Issue 1-4, p1 

    This statement summarizes the 6th International Conference on Acidic Deposition, also known as "Acid rain 2000". It provides an overview of what was discussed at the conference, the current state of the acidic deposition issues, and the major outcome of the discussions. Summaries are included of...

  • Sulfuric Compounds in the Surface Layer of Bottom Deposits in the Mouth Reach of the Northern Dvina River.
    Kokryatskaya, N. M.; Troyanskaya, A. F.; Volkov, I. I. // Water Resources; Nov2000, Vol. 27 Issue 6, p646 

    The distribution of reduced sulfuric compounds in the surface layer of bottom deposits in the Northern Dvina mouth was examined. The natural biogeochemical processes and anthropogenic pollution are found to cause the formation and accumulation of reduced sulfuric compounds (mostly pyrite and...

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