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Sulfur
Kinds of Sulfur Terms modified by Sulfur Selected AbstractsRenewable Copper and Silver Amalgam Film Electrodes of Prolonged Application for the Determination of Elemental Sulfur Using Stripping VoltammetryELECTROANALYSIS, Issue 7 2008Robert Piech Abstract New, renewable copper (Hg(Cu)FE) and silver (Hg(Ag)FE) based amalgam film electrodes applied for the determination of elemental sulfur using differential pulse cathodic stripping voltammetry are presented. With surface areas adjustable from 1 to 12,mm2, both electrodes are characterized by very good surface reproducibility (,2%) and long-term stability (a few thousand measurement cycles). The mechanical refreshing of the amalgam film takes about 1,2 seconds. The effects of various factors such as instrumental parameters and the supporting electrolyte composition were optimized. Interferences from sulfides are easily removed by the addition of acid, and bubbling with argon, for Hg(Ag)FE. In the case of Hg(Cu)FE, sulfides did not interfere. The calibration graph is linear within the studied range from 16,ng L,1 to 4.8,,g L,1 for Hg(Cu)FE, and up to 6.4,,g L,1 for Hg(Ag)FE (tacc=15,s). The correlation coefficients for the two electrodes were at least 0.997. The detection limits for a low concentration of S(0) and tacc=60,s are as low as 14,ng L,1 for Hg(Cu)FE and 4,ng L,1 for Hg(Ag)FE. The proposed method was successfully applied and validated by studying the recovery of S(0) from spiked river water. [source] Comparative Studies of Tridentate Sulfur and Nitrogen-Containing Ligands as Ionophores for Construction of Cadmium Ion-Selective Membrane SensorsELECTROANALYSIS, Issue 11 2007Ashok, Kumar Singh Abstract New polymeric membrane cadmium-ion selective sensors have been prepared by incorporating nitrogen and sulfur containing tridentate ligands as the ionophores into the plasticized PVC membranes. Poly(vinyl chloride) (PVC) based membranes of potassium hydrotris[N -(2,6-xylyl)thioimdazolyl) borate] (KTt2,6-xylyl) and potassium hydrotris(3-phenyl-5-methylpyrazolyl) borate (KTpPh,Me) with sodium tetraphenyl borate (NaTPB) as an anionic excluder and dibutylphthalate (DBP), tributylphthalate (TBP), dioctylsebacate (DOS), and o -nitrophenyloctyl ether (o -NPOE) as plasticizing solvent mediators were investigated in different compositions. KTt2,6-xylyl was found to be a selective and sensitive ion carrier for Cd(II) membrane sensor. A membrane composed of KTt2,6-xylyl:NaTPB:PVC:DBP with the % mole ratio 2.3,:,1.1,:,34.8,:,61.8 (w/w) works well over a very wide concentration range (7.8×10,8,1.0×10,2,M) with a Nernstian slope of 29.4±0.2,mV/decades of activity between pH values of 3.5 to 9.0 with a detection limit of 4.37×10,8,M. The sensor displays very good discrimination toward Cd(II) ions with regard to most common cations. The proposed sensor shows a short response time for whole concentration range (ca. 8,s). The effects of the cationic (tetrabutylammonium chloride, TBC), anionic (sodium dodecyl sulfate, SDS) and nonionic (Triton X-100) surfactants were investigated on the potentiometric properties of proposed cadmium-selective sensor. The proposed sensor based on KTt2,6-xylyl ionophore has also been used for the direct determination of cadmium ions in different water samples and human urine samples. [source] Elemental sulfur: Toxicity in vivo and in vitro to bacterial luciferase, in vitro yeast alcohol dehydrogenase, and bovine liver catalaseENVIRONMENTAL TOXICOLOGY, Issue 4 2004Anolda, etkauskait Abstract The aim of this research was to analyze the effects and the modes of action of elemental sulfur (S0) in bioluminescence and respiration of Vibrio fischeri cells and the enzymes crude luciferase, pure catalase, and alcohol dehydrogenase (ADH). Metallic copper removed sulfur and reduced the toxicity of acetone extracts of sediment samples analyzed in the bioluminescence test. The sulfur inhibition of cell bioluminescence was noncompetitive with decanal, the luciferase substrate; reversible, with maximum toxicity after 15 min (EC50 = 11.8 ,g/L); and almost totally recovered after 2 h. In vitro preincubation of crude luciferase extract with sulfur (0.28 ppm) weakly inhibited bioluminescence at 5 min, but at 30 min the inhibition reached 60%. Increasing the concentration of sulfur in the parts per million concentration range in vitro decreased bioluminescence, which was not constant, but depended on exposure time, and no dead-end/total inhibition was observed. The redox state of enzymes in the in vitro system significantly affected inhibition. Hydrogen peroxide restored fully and the reducing agent dithiothreitol, itself toxic, restored only partially luciferase activity in the presence of sulfur. Sulfur (5.5 ppm) slightly inhibited ADH and catalase, and dithiothreitol enhanced sulfur inhibition. High sulfur concentrations (2.2 ppm) inhibited the bioluminescence and enhanced the respiration rate of V. fischeri cells. Elemental sulfur data were interpreted to show that sulfur acted on at least a few V. fischeri cell sites: reversibly modifying luciferase at sites sensitive to/protected by oxidative and reducing agents and by affecting electron transport processes, resulting in enhanced oxygen consumption. Sulfur together with an enzyme reducing agent inhibited the oxidoreductive enzymes ADH and catalase, which have SH groups, metal ion cofactors, or heme, respectively, in their active centers. © 2004 Wiley Periodicals, Inc. Environ Toxicol 19: 372,386, 2004. [source] Utilization of the Versatility of Sulfur in C,C Bond Formation and Cleavage: Synthesis of ABC Taxoid SkeletonsEUROPEAN JOURNAL OF ORGANIC CHEMISTRY, Issue 20 2007Subhash P. Chavan Abstract A practical and convenient five-step protocol is described to access the ABC ring system of Taxol by utilizing the versatility of the sulfur atom in its various oxidation states viz., condensation/Pummerer cyclization/coupling/annulation/fragmentation. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2007) [source] Synthesis of 1,3-Difunctionalized Cyclopentenes and 1,3,5-Trifunctionalized Cyclohexanes by Silicon-Induced Domino ReactionsEUROPEAN JOURNAL OF ORGANIC CHEMISTRY, Issue 6 2003Frank Tries Abstract A novel domino process based on a 1,4-C,O shift of a silyl group (4 , 3) and a Michael-induced ring-closure reaction (3 , 2) is investigated. Specifically, attack of carbanions 5 on vinyloxiranes 6 usually occurs on the oxirane unit to give the desired silyl shift. When starting from vinyloxiranes 6a and 6b, however, the reaction stops at this stage to give silyl ethers 7. Sulfur (6c) or silicon activation (6d,f) of the C=C unit is required to yield cyclopentenes 1a,d. Analogously, carbanion 5a and allyloxiranes 15 give cyclization products 19,22, particularly if the ring-closure step is supported by silicon substitution. (© Wiley-VCH Verlag GmbH & Co. KGaA, 69451 Weinheim, Germany, 2003) [source] Enzymatic activation of sulfur for incorporation into biomolecules in prokaryotesFEMS MICROBIOLOGY REVIEWS, Issue 6 2006Dorothea Kessler Abstract Sulfur is a functionally important element of living matter. Incorporation into biomolecules occurs by two basic strategies. Sulfide is added to an activated acceptor in the biosynthesis of cysteine, from which methionine, coenzyme A and a number of biologically important thiols can be constructed. By contrast, the biosyntheses of iron sulfur clusters, cofactors such as thiamin, molybdopterin, biotin and lipoic acid, and the thio modification of tRNA require an activated sulfur species termed persulfidic sulfur (R-S-SH) instead of sulfide. Persulfidic sulfur is produced enzymatically with the IscS protein, the SufS protein and rhodanese being the most prominent biocatalysts. This review gives an overview of sulfur incorporation into biomolecules in prokaryotes with a special emphasis on the properties and the enzymatic generation of persulfidic sulfur as well as its use in biosynthetic pathways. [source] The Role of Sulfur in the Synthesis of Novel Carbon Morphologies: From Covalent Y-Junctions to Sea-Urchin-Like StructuresADVANCED FUNCTIONAL MATERIALS, Issue 8 2009Jose´ M. Romo-Herrera Abstract A detailed characterization, using high resolution electron microscopy/microanalysis (SEM, TEM, HRTEM, and EDX), reveals tubular carbon nanostructures exhibiting complex and fascinating morphologies. The materials were obtained by sulfur-assisted chemical vapor deposition. It is demonstrated that S not only acts on the catalyst, but also can be detected in the carbon lattice of the nanostructures. The experimental data presented here confirms the critical role of S, which is responsible for inducing curvature and therefore influencing the final carbon nanostructure morphology. In particular, different types of covalent Y-junctions of CNTs and even sea urchin-like nanostructures were produced and their experimental conditions are listed and discussed. [source] Quantitative Recovery of Elemental Sulfur and Improved Selectivity in a Chromium-Reducible Sulfur DistillationGEOSTANDARDS & GEOANALYTICAL RESEARCH, Issue 1 2009Jens Gröger soufre réductible par le chrome; CRS; soufre élémentaire; selectivité; efficacité de distillation Chromium-reducible sulfur (CRS) distillations are intended to recover only reduced inorganic sulfur compounds (RIS) including elemental sulfur. However, the quantitative recovery of elemental sulfur is not ensured in common CRS-distillations. The new method presented here was designed to remedy this deficiency. An increase in ethanol concentration assured the quantitative recovery of elemental sulfur in various forms and, in addition, all other RIS-compounds were quantitatively recovered. Furthermore, the selectivity of the procedure was improved by an additional filtration step to eliminate zinc particles from the Cr(II)-solution. Thus, the recovery of sulfates and organic sulfur compounds was significantly decreased by a factor of up to 35, depending on the compound analysed. Exhaustive testing with a variety of pure phases, rock and soil samples demonstrated the precision and accuracy of the new method. The new protocol eliminated the constraints of previous procedures. The improved distillation efficiency for elemental sulfur ensured the quantitative recovery of all RIS-compounds in a single-step distillation. Des distillations du soufre réductible par le chrome (CRS) ont été effectuées afin de récupérer uniquement les composés soufrés inorganiques (RIS: reduced inorganic sulfures) dont le soufre élémentaire. La procédure classique de distillation CRS ne permet pas néanmoins la récupération totale du soufre élémentaire. Une nouvelle méthode, présentée ici, a été développée pour remédier à ce problème. L'augmentation de la concentration en éthanol assure la récupération totale du soufre élémentaire sous différentes formes et, de plus, celle de tous les autres composés RIS. La sélectivité de la procédure a été améliorée par l'ajout d'une étape de filtration, qui élimine des particules de zinc provenant de la solution Cr(II). Ceci a entraîné une diminution jusqu'à un facteur 35 du taux d'extraction des sulfates et des composés soufrés organiques, selon les composés analysés. Des tests extensifs sur différentes phases pures et des échantillons de roches et de sols ont montré la précision et la justesse de cette nouvelle méthode. Le nouveau protocole élimine les contraintes des procédures passées. L'amélioration de l'efficacité de cette distillation concernant le soufre élémentaire garantit une récupération fiable de tous les composés RIS par une distillation en une seule étape. [source] Activation of Elemental Sulfur by Electrogenerated Cyanomethyl Anion: Synthesis of Substituted 2-Aminothiophenes by the Gewald ReactionADVANCED SYNTHESIS & CATALYSIS (PREVIOUSLY: JOURNAL FUER PRAKTISCHE CHEMIE), Issue 17 2008Marta Feroci Abstract The activation of elemental sulfur (S8) has been achieved by means of electrogenerated cyanomethyl anion [easily obtained by galvanostatic reduction from acetonitrile/tetraethylammonium hexafluorophosphate (MeCN-Et4NPF6)]. The "activated" sulfur reacted with ylidenemalononitriles to give substituted 2-aminothiophenes in very high yields. This variation of the Gewald reaction has been carried out using only catalytic amounts of electricity and supporting electrolyte. A proposed mechanism for the interaction between S8 and cyanomethyl anion is described. [source] Comparative evaluation of Ca chloride and Ca phosphate for extractable sulfur in soils with a wide range in pHJOURNAL OF PLANT NUTRITION AND SOIL SCIENCE, Issue 3 2009Kanwar L. Sahrawat Abstract Deficiency of sulfur (S) is becoming widespread in the rainfed systems of India, and there is increasing need for diagnosing the deficiency. Calcium chloride and Ca phosphate are commonly used for extracting available S in soils. Because of cost and the ease of availability locally, we prefer using Ca chloride as an extractant over Ca phosphate, for extracting available S. However, there is paucity of data on the comparative evaluation of the two extractants to extract available S, especially in soils having a wide range in natural pH (from acidic to alkaline range). It is recognized that soil pH plays a dominant role in the adsorption,desorption and extractability of sulfate-S in soils. We compared the extraction of S by Ca chloride and Ca phosphate in 86 Indian soils having a wide range in pH (4.5 to 10.6). Sulfur in the extracts was determined by ICP-AES. Considering all the 86 soil samples tested, there was an excellent agreement between the values of extractable S determined by using the two extractants (r = 0.96, p < 0.001). However, the correlation coefficient (r) between the values of extractable S by the two reagents, although highly significant, varied among the groups of soil samples according to the range in soil pH. The highest correlation coefficient (r = 0.99, p < 0.0001, n = 17) was found for soils with pH in the alkaline range (8.5,10.6), and the lowest correlation coefficient (r = 0.71, p < 0.0001, n = 58) was obtained with a set of soil samples with pH in the acidic range (4.5,6.5). For soil samples having pH in the near-neutral range (6.7,7.3), an excellent agreement was observed (r = 0.93, p < 0.0001, n =11) between the extractable-S values obtained by the two extractants. While Ca phosphate extracted higher amount of S compared to Ca chloride in soil samples with pH in the acidic range, the two extractants were equally effective for soil samples with pH in the neutral or alkaline range. Our results suggest that for most of the soils in the semiarid tropical regions, which have pH in the neutral to alkaline range, Ca chloride can replace Ca phosphate as an extractant for removing available S in such soils. [source] Sulfur and nitrogen supply influence growth, product appearance, and glucosinolate concentration of broccoliJOURNAL OF PLANT NUTRITION AND SOIL SCIENCE, Issue 1 2007Ilona Schonhof Abstract The effects of insufficient and optimal sulfur (S) and nitrogen (N) supply on plant growth and glucosinolate formation were studied under controlled experimental conditions in broccoli "Monaco". Here, we report on the interaction between S and N supply, plant growth, and quality parameters and discuss the relevance of this interaction in relation to crop-management strategies. Broccoli plants supplied with insufficient amounts of S or N showed typical deficiency symptoms and yield decreases. In contrast, total glucosinolate concentrations were high at insufficient N supply, independent of the S level, and low at insufficient S supply in combination with an optimal N supply. This was mainly due to the presence of the alkyl glucosinolates glucoraphanin and glucoiberin. Furthermore, with S concentrations above 6 g (kg DM),1 and an N : S ratio lower than 10:1, the glucosinolate concentrations were on average around 0.33 g (kg fresh matter),1 and differed significantly from those plants characterized by an S concentration below 6 g (kg DM),1 and an N : S ratio above 10:1. In addition, N : S ratios between 7:1 and 10:1 promoted plant yield and enhanced overall appearance. Therefore, to produce broccoli (and potentially other Brassicaceae) with higher crop yields and enhanced product quality in the field, it is vital to establish the optimal S and N nutritional status of the plant and to integrate this information into crop-management strategy programs. [source] Sulfur fertilization and light exposure during storage are critical determinants of the nutritional value of ready-to-eat friariello campano (Brassica rapa L. subsp. sylvestris)JOURNAL OF THE SCIENCE OF FOOD AND AGRICULTURE, Issue 13 2009Giancarlo Barbieri Abstract BACKGROUND: The nutritional value of fresh vegetables can be affected at different steps within the field-to-market pipeline. Both pre- and post-harvest factors should be considered in order to increase the produce quality and to preserve it until final consumption. In this study the effects of sulfur nutrition during plant growth and light exposure during storage on the nutritional value of ready-to-eat friariello campano (Brassica rapa L. subsp. sylvestris L. Janch. var. esculenta Hort.) were studied. RESULTS: Fresh weight loss was higher in light-storage treatment. During storage, light exposure reduced leaf nitrate content, although no effect could be attributed to sulfur nutrition. Sulfur increased both lipophilic and hydrophilic antioxidant activity. The hydrophilic antioxidant activity linearly decreased during storage, whereas the lipophilic activity increased over time. However, no differences could be attributed to light exposure during storage for this parameter. Results on colorimetric indexes and their relation with the chlorophyll content are also reported. CONCLUSIONS: Ready-to-eat friariello quality may be improved with an enhanced antioxidant activity and reduced nitrate content by combining, respectively, increased sulfur availability during plant growth and exposure to light during storage. On the other hand, light exposure caused a more rapid decline in produce fresh weight during storage. Copyright © 2009 Society of Chemical Industry [source] Sulfur Deficiency Changes Mycosporine-like Amino Acid (MAA) Composition of Anabaena variabilis PCC 7937: A Possible Role of Sulfur in MAA BioconversionPHOTOCHEMISTRY & PHOTOBIOLOGY, Issue 4 2010Shailendra P. Singh In the present investigation we show for the first time that bioconversion of a primary mycosporine-like amino acid (MAA) into a secondary MAA is regulated by sulfur deficiency in the cyanobacterium Anabaena variabilis PCC 7937. This cyanobacterium synthesizes the primary MAA shinorine (RT = 2.2 min, ,max = 334 nm) under normal conditions (PAR + UV-A + UV-B); however, under sulfur deficiency, a secondary MAA palythine-serine (RT = 3.9 min, ,max = 320 nm) appears. Addition of methionine to sulfur-deficient cultures resulted in the disappearance of palythine-serine, suggesting the role of primary MAAs under sulfur deficiency in recycling of methionine by donating the methyl group from the glycine subunit of shinorine to tetrahydrofolate to regenerate the methionine from homocysteine. This is also the first report for the synthesis of palythine-serine by cyanobacteria which has so far been reported only from corals. Addition of methionine also affected the conversion of mycosporine-glycine into shinorine, consequently, resulted in the appearance of mycosporine-glycine (RT = 3.6 min, ,max = 310 nm). Our results also suggest that palythine-serine is synthesized from shinorine. Based on these results we propose that glycine decarboxylase is the potential enzyme that catalyzes the bioconversion of shinorine to palythine-serine by decarboxylation and demethylation of the glycine unit of shinorine. [source] Evolution of Hydrothermal System at the Dizon Porphyry Cu-Au Deposit, Zambales, PhilippinesRESOURCE GEOLOGY, Issue 2 2005Akira Imai Abstract. Evolution of hydrothermal system from initial porphyry Cu mineralization to overlapping epithermal system at the Dizon porphyry Cu-Au deposit in western central Luzon, Zambales, Philippines, is documented in terms of mineral paragen-esis, fluid inclusion petrography and microthermometry, and sulfur isotope systematics. The paragenetic stages throughout the deposit are summarized as follows; 1) stockwork amethystic quartz veinlets associated with chalcopyrite, bornite, magnetite and Au enveloped by chlorite alteration overprinting biotite alteration, 2) stockwork quartz veinlets with chalcopyrite and pyrite associated with Au and chalcopyrite and pyrite stringers in sericite alteration, 3) stringer quartz veinlets associated with molybdenite in sericite alteration, and 4) WNW-trending quartz veins associated with sphalerite and galena at deeper part, while enargite and stibnite at shallower levels associated with advanced argillic alteration. Chalcopyrite and bornite associated with magnetite in quartz veinlet stockwork (stage 1) have precipitated initially as intermediate solid solution (iss) and bornite solid solution (bnss), respectively. Fluid inclusions in the stockwork veinlet quartz consist of gas-rich inclusions and polyphase inclusions. Halite in polyphase inclusions dissolves at temperatures ranging from 360d,C to >500d,C but liquid (brine) and gas (vapor) do not homogenize at <500d,C. The maximum pressure and minimum temperature during the deposition of iss and bnss with stockwork quartz veinlets are estimated to be 460 bars and 500d,C. Fluid inclusions in veinlet stockwork quartz enveloped in sericite alteration (stage 2) consist mainly of gas-rich inclusions and polyphase inclusions. In addition to the possible presence of saturated NaCl crystals at the time of entrapment of fluid inclusions that exhibit the liquid-vapor homogenization temperatures lower than the halite dissolution temperatures in some samples, wide range of temperatures of halite dissolution and liquid-vapor homogenization of polyphase inclusions from 230d,C to >500d,C and from 270d,C to >500d,C, respectively, suggests heterogeneous entrapment of gaseous vapor and hypersaline brine. The minimum pressure and temperature are estimated to be about 25 bars and 245d,C. Fluid inclusions in veinlet quartz associated with molybdenite (stage 3) are dominated by gas-rich inclusions accompanied with minor liquid-rich inclusions that homogenize at temperatures between 350d,C and 490d,C. Fluid inclusions in vuggy veinlet quartz associated with stibnite (stage 4) consist mainly of gas-rich inclusions with subordinate polyphase inclusions that do not homogenize below 500d,C. Fluid inclusions in veinlet quartz associated with galena and sphalerite (stage 4) are composed of liquid-rich two-phase inclusions, and they homogenize into liquid phase at temperatures ranging widely from 190d,C to 300d,C (suggesting boiling) and the salinity ranges from 1.0 wt% to 3.4 wt% NaCl equivalent. A pressure of about 15 bars is estimated for the dilute aqueous solution of 190d,C from which veinlet quartz associated with galena and sphalerite precipitated. In addition to a change in temperature-pressure regime from lithostatic pressure during the deposition of iss and bnss with stockwork quartz veinlets to hydrostatic pressure during fracture-controlled quartz veinlet associated with galena and sphalerite, a decrease in pressure is supposed to have occurred due to unroofing or removal of the overlying piles during the temperature decrease in the evolution of hydrothermal system. The majority of the sulfur isotopic composition of sulfides ranges from ±0 % to +5 %. Sulfur originated from an iso-topically uniform and homogeneous source, and the mineralization occurred in a single hydrothermal system. [source] A monoclinic polymorph of bis(tert -butylperthiophosphonic) dianhydrideACTA CRYSTALLOGRAPHICA SECTION C, Issue 3 2000Burkhard Ziemer In comparison with the known orthorhombic polymorph oftrans -2,4-di- tert -butyl-2,4-dithioxo-1,3-dithia-2,4-diphosphetane, C8H18P2S4, (I) [Shore, Pennington, Noble & Cordes (1988). Phosphorous Sulfur, 39, 153,157], the new crystallographic modification is monoclinic and the corresponding solid density is markedly higher. In both structures, the molecules have 2/m symmetry imposed by space-group symmetry and all corresponding bond lengths and angles are equal within the limits of errors. [source] Structure of the aliphatic sulfonate-binding protein SsuA from Escherichia coliACTA CRYSTALLOGRAPHICA SECTION F (ELECTRONIC), Issue 4 2010John Beale Sulfur is an essential component for the biosynthesis of the sulfur-containing amino acids l -methionine and l -cysteine. Under sulfur-starvation conditions, bacteria are capable of scavenging sulfur from sulfur-containing compounds and transporting it across membranes. Here, the crystal structure of the periplasmic aliphatic sulfonate-binding protein SsuA from Escherichia coli is reported at 1.75,Å resolution in the substrate-free state. The overall structure of SsuA resembles the structures of other periplasmic binding proteins and contains two globular domains that form a cleft. Comparison with other periplasmic binding proteins revealed that one of the domains has been displaced by a rigid movement of 17°. Interestingly, the tight crystal packing appears to be mediated by a 13-amino-acid tail from the cloning that folds within the cleft of the next monomer. [source] ChemInform Abstract: Soft,Hard Acid,Base Interactions: Probing Coordination Preferences of Sulfur and Selenium in Mixed Chalcophosphates in the Family APbPS4-xSex (A: K, Rb, Cs; x = 0,4).CHEMINFORM, Issue 47 2009Alexander Rothenberger Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source] ChemInform Abstract: Antimicrobial Activity of Novel Fused Nitrogen, Sulfur and Phosphorus Containing-Heterocycles and Relevant Phosphonates with Difurylpyridazine Species.CHEMINFORM, Issue 25 2009Wafaa M. Abdou Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source] ChemInform Abstract: Atroposelective Radical Aryl Migration Reactions from Sulfur to Carbon.CHEMINFORM, Issue 20 2009Birte Schulte Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The original article is trackable via the "References" option. [source] N-(2-Alkoxycarbonylbenzenesulfenyl)benzimidazoles as Nitrogen-, Sulfur-, and Carbon-Sulfenylation Reagents.CHEMINFORM, Issue 24 2007Masao Shimizu Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF. [source] A Facile Method for the Synthesis of 1,3-Oxathiolan-2-ones by Reaction of Oxiranes, Sulfur, and Carbon Monoxide.CHEMINFORM, Issue 43 2006Yutaka Nishiyama Abstract ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF. [source] Solvent-Assisted Thiocarboxylation of Amines and Alcohols with Carbon Monoxide and Sulfur under Mild Conditions.CHEMINFORM, Issue 52 2005Takumi Mizuno Abstract For Abstract see ChemInform Abstract in Full Text. [source] Phosphonates Containing Sulfur and Selenium.CHEMINFORM, Issue 14 2005-Selenenyl, -Seleninyl Moieties, -Sulfenyl, -Sulfinyl, Studies on Nucleophilic Addition., Synthesis of Vinylphosphonates Bearing Abstract For Abstract see ChemInform Abstract in Full Text. [source] Electrophilic Attack on Sulfur,Sulfur Bonds.CHEMINFORM, Issue 43 2004Part 1. Abstract For Abstract see ChemInform Abstract in Full Text. [source] Gas-Phase Structure, Conformation, and Sulfur 2p Photoelectron Spectroscopy of Pentafluorosulfur Fluorosulfonate, SF5OSO2FCHEMINFORM, Issue 34 2004Christiane Leibold Abstract For Abstract see ChemInform Abstract in Full Text. [source] Practical Synthesis of S-Alkyl Thiocarbamate Herbicides by Carbonylation of Amines with Carbon Monoxide and Sulfur.CHEMINFORM, Issue 28 2004Takumi Mizuno Abstract For Abstract see ChemInform Abstract in Full Text. [source] Aromatic Hydrocarbon-Catalyzed Direct Reaction of Sulfur and Sodium in a Heterogeneous System: Selective and Facile Synthesis of Sodium Monosulfide and Disulfide.CHEMINFORM, Issue 37 2003Toshikazu Takata Abstract For Abstract see ChemInform Abstract in Full Text. [source] Reaction of Aldehydes with Hydrazine in the System Sulfur,Alkali.CHEMINFORM, Issue 19 2003N. V. Russavskaya Abstract For Abstract see ChemInform Abstract in Full Text. [source] Reactions of Novel Mono- and Difluoroacetyltrialkylsilanes with Sulfur and Phosphorus Ylides.CHEMINFORM, Issue 12 2003Silvana C. Ngo Abstract For Abstract see ChemInform Abstract in Full Text. [source] Condensed Thiophenes and Selenophenes: Thionyl Chloride and Selenium Oxychloride as Sulfur and Selenium Transfer Reagents.CHEMINFORM, Issue 38 2002Ramiya R. Amaresh Abstract For Abstract see ChemInform Abstract in Full Text. [source] | ||||||||||||||||||||||||||||||||||||||||||||||||||||