Relevant bibliographies by topics / Organosulfur

Academic literature on the topic 'Organosulfur'

Author: Grafiati
Published: 4 June 2021
Last updated: 20 February 2023

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Journal articles on the topic "Organosulfur"

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Arisawa, Mieko, and Masahiko Yamaguchi. "Transition-metal-catalyzed synthesis of organosulfur compounds." Pure and Applied Chemistry 80, no. 5 (January 1, 2008): 993–1003. http://dx.doi.org/10.1351/pac200880050993.

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Rhodium complexes are efficient catalysts for the synthesis of organosulfur compounds. They catalyze the addition reaction of organosulfur groups to unsaturated compounds, the substitution of C-H with organosulfur groups, and single-bond metathesis reactions. They cleave S-S bonds and transfer the organosulfur groups to various organic and inorganic molecules, including alkynes, allenes, disulfides, sulfur, isonitriles, imines, diphosphines, thiophosphinites, hydrogen, 1-alkylthio-1-alkynes, thioesters, and allyl sulfides.
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Qiu, Yichen, Yunchao Feng, Ashley C. Lindsay, Xianhai Zeng, and Jonathan Sperry. "Synthesis of bio-based 2-thiothiophenes." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 379, no. 2209 (September 13, 2021): 20200350. http://dx.doi.org/10.1098/rsta.2020.0350.

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While the synthesis of bio-based compounds containing carbon, oxygen and (to a lesser extent) nitrogen is well studied, the production of organosulfur compounds from biomass has received virtually no attention, despite their widespread application throughout the chemical industry. Herein, we demonstrate that a range of bio-based 2-thiothiophenes are available from the biopolymer cellulose, proving that functionally diverse small-molecule organosulfurs can be prepared independent of fossil carbon. This article is part of the theme issue ‘Bio-derived and bioinspired sustainable advanced materials for emerging technologies (part 2)’.
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Chauvin, Jean-Philippe R., Zosia A. M. Zielinski, and Derek A. Pratt. "Inspired by garlic: insights on the chemistry of sulfenic acids and the radical-trapping antioxidant activity of organosulfur compounds." Canadian Journal of Chemistry 94, no. 1 (January 2016): 1–8. http://dx.doi.org/10.1139/cjc-2015-0438.

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Organosulfur compounds have long been recognized as important antioxidants for the preservation of petroleum-derived products. It has also been suggested that the health benefits of garlic and related plant species can be ascribed to the radical-trapping antioxidant activity of some of their unique organosulfur constituents, such as allicin. This account highlights our efforts to elucidate the radical-trapping antioxidant mechanisms of allicin and related plant-derived organosulfur compounds as well as the organosulfur compounds used to preserve commercial and industrial products.
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Shine, Henry J. "Researches in organosulfur chemistry by a non-organosulfur chemist." Sulfur reports 15, no. 3 (August 1994): 381–93. http://dx.doi.org/10.1080/01961779408050635.

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Doddipatla, Srinivas, Chao He, Ralf I. Kaiser, Yuheng Luo, Rui Sun, Galiya R. Galimova, Alexander M. Mebel, and Tom J. Millar. "A chemical dynamics study on the gas phase formation of thioformaldehyde (H2CS) and its thiohydroxycarbene isomer (HCSH)." Proceedings of the National Academy of Sciences 117, no. 37 (August 28, 2020): 22712–19. http://dx.doi.org/10.1073/pnas.2004881117.

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Complex organosulfur molecules are ubiquitous in interstellar molecular clouds, but their fundamental formation mechanisms have remained largely elusive. These processes are of critical importance in initiating a series of elementary chemical reactions, leading eventually to organosulfur molecules—among them potential precursors to iron-sulfide grains and to astrobiologically important molecules, such as the amino acid cysteine. Here, we reveal through laboratory experiments, electronic-structure theory, quasi-classical trajectory studies, and astrochemical modeling that the organosulfur chemistry can be initiated in star-forming regions via the elementary gas-phase reaction of methylidyne radicals with hydrogen sulfide, leading to thioformaldehyde (H2CS) and its thiohydroxycarbene isomer (HCSH). The facile route to two of the simplest organosulfur molecules via a single-collision event affords persuasive evidence for a likely source of organosulfur molecules in star-forming regions. These fundamental reaction mechanisms are valuable to facilitate an understanding of the origin and evolution of the molecular universe and, in particular, of sulfur in our Galaxy.
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Arisawa, Mieko, and Masahiko Yamaguchi. "Rhodium-Catalyzed Synthesis of Organosulfur Compounds Involving S-S Bond Cleavage of Disulfides and Sulfur." Molecules 25, no. 16 (August 7, 2020): 3595. http://dx.doi.org/10.3390/molecules25163595.

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Organosulfur compounds are widely used for the manufacture of drugs and materials, and their synthesis in general conventionally employs nucleophilic substitution reactions of thiolate anions formed from thiols and bases. To synthesize advanced functional organosulfur compounds, development of novel synthetic methods is an important task. We have been studying the synthesis of organosulfur compounds by transition-metal catalysis using disulfides and sulfur, which are easier to handle and less odiferous than thiols. In this article, we describe our development that rhodium complexes efficiently catalyze the cleavage of S-S bonds and transfer organothio groups to organic compounds, which provide diverse organosulfur compounds. The synthesis does not require use of bases or organometallic reagents; furthermore, it is reversible, involving chemical equilibria and interconversion reactions.
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Egbujor, Melford Chuka, Maria Petrosino, Karim Zuhra, and Luciano Saso. "The Role of Organosulfur Compounds as Nrf2 Activators and Their Antioxidant Effects." Antioxidants 11, no. 7 (June 26, 2022): 1255. http://dx.doi.org/10.3390/antiox11071255.

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Nuclear factor erythroid 2-related factor 2 (Nrf2) signaling has become a key pathway for cellular regulation against oxidative stress and inflammation, and therefore an attractive therapeutic target. Several organosulfur compounds are reportedly activators of the Nrf2 pathway. Organosulfur compounds constitute an important class of therapeutic agents in medicinal chemistry due to their ability to participate in biosynthesis, metabolism, cellular functions, and protection of cells from oxidative damage. Sulfur has distinctive chemical properties such as a large number of oxidation states and versatility of reactions that promote fundamental biological reactions and redox biochemistry. The presence of sulfur is responsible for the peculiar features of organosulfur compounds which have been utilized against oxidative stress-mediated diseases. Nrf2 activation being a key therapeutic strategy for oxidative stress is closely tied to sulfur-based chemistry since the ability of compounds to react with sulfhydryl (-SH) groups is a common property of Nrf2 inducers. Although some individual organosulfur compounds have been reported as Nrf2 activators, there are no papers with a collective analysis of these Nrf2-activating organosulfur compounds which may help to broaden the knowledge of their therapeutic potentials and motivate further research. In line with this fact, for the first time, this review article provides collective and comprehensive information on Nrf2-activating organosulfur compounds and their therapeutic effects against oxidative stress, thereby enriching the chemical and pharmacological diversity of Nrf2 activators.
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Yuen, Pong Kau, and Cheng Man Diana Lau. "New approach for assigning mean oxidation number of carbons to organonitrogen and organosulfur compounds." Chemistry Teacher International 4, no. 1 (October 8, 2021): 1–13. http://dx.doi.org/10.1515/cti-2021-0015.

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Abstract Organonitrogen and organosulfur compounds are abundant in the natural environment. To understand the biological redox pathways properly, it is important for learners to be able to count the oxidation number of organic carbons. However, the process of counting is not always easy. In addition, organonitrogen and organosulfur molecules are seldom studied. To compensate these problems, this paper explores the bond-dividing method, which can effectively determine the mean oxidation number of carbons of organonitrogen and organosulfur molecules. This method uses the cleavage of carbon-sulfur and carbon-nitrogen bonds to obtain the organic and inorganic fragments. The mean oxidation numbers of carbon atoms, nitrogen atoms, and sulfur atoms can be calculated by the molecular formulas of their fragments. Furthermore, when comparing organosulfur or organonitrogen molecules in a redox conversion, the changes of the mean oxidation numbers of carbon atoms, nitrogen atoms, and sulfur atoms can be used as indicators to identify the redox positions and determine the number of transferred electrons.
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Nakahodo, Tsukasa, Midori O. Ishitsuka, Yuta Takano, Takahiro Tsuchiya, Takeshi Akasaka, M. Angeles Herranz, Nazario Martin, Dirk M. Guldi, and Shigeru Nagase. "Organosulfur-Based Fullerene Materials." Phosphorus, Sulfur, and Silicon and the Related Elements 186, no. 5 (May 1, 2011): 1308–11. http://dx.doi.org/10.1080/10426507.2010.523033.

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Kiełbasiński, Piotr. "Biocatalysis in Organosulfur Chemistry." Phosphorus, Sulfur, and Silicon and the Related Elements 186, no. 5 (May 1, 2011): 1104–18. http://dx.doi.org/10.1080/10426507.2010.541397.

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Dissertations / Theses on the topic "Organosulfur"

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Haughey, Simon Anthony. "Chemoenzymatic synthesis of organosulfur compounds." Thesis, Queen's University Belfast, 1996. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.318731.

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King, Alistair William Thomas. "Chemoenzymatic synthesis of chiral organosulfur compounds." Thesis, Queen's University Belfast, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.396118.

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Chowdhury, Mohima Begum Roomi. "Unsaturated organosulfur chemistry : synthesis and applications." Thesis, University College London (University of London), 2018. http://discovery.ucl.ac.uk/10045805/.

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The original focus of this thesis was ynol ether synthesis which was successful using simple and easy-to-prepare precursors (chloroacetylenes) but low yielding. Attention was then diverted to the design and synthesis of a range of thioynol ethers (alkynyl sulfides) utilising chloroacetylenes. The reaction of a chloroacetylene with a thiolate salt in the presence of an amine mediator (Me2NH or DMEDA) yielded the alkynyl sulfides in excellent yields. The alkynyl chlorides were easily prepared from the parent alkynes contrasting sharply with the cumbersome synthesis of an alkynyl sulfonamide previously required. As well as chloroacetylenes, bromo- and iodoacetylenes have also been studied and the differences in their reactivity are highlighted. With a successful route to thioynol ethers at hand, brief mechanistic investigations were conducted into their reactivity. Finally, preliminary studies have been carried out on the reactivity of their derivatives.
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Class, Caleb Andrew. "Predicting organosulfur chemistry in fuel sources." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/98155.

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Thesis: Ph. D., Massachusetts Institute of Technology, Department of Chemical Engineering, 2015.
Cataloged from PDF version of thesis.
Includes bibliographical references.
Desulfurization of fossil fuels with supercritical water (SCW) has been the topic of many studies over the past few decades. This process does not require the use of any catalyst, eliminates the need for a hydrogen feed, and minimizes coke formation. Previous research has shown that it has the potential to be a viable commercial process, and recent experimental studies have proven that water acts as one hydrogen source for sulfur removal in this process. However, the exact desulfurization mechanism is largely unknown, as are many other reaction mechanisms involving sulfur compounds. Recent work has greatly expanded our ability to build comprehensive reaction mechanisms automatically for the decomposition of organic sulfur compounds using the automated Reaction Mechanism Generator (RMG). This thesis presents the implementation of this and other tools to investigate chemical processes relevant to our use of fuel sources containing sulfur compounds, and it shows some steps that have been taken to improve our predictions for these mechanisms and those that will be generated in the future. Previous investigations had focused on the pyrolysis of small sulfur compounds containing less than six heavy atoms, so RMG is first used to study the pyrolysis of t-butyl sulfide. A detailed reaction mechanism is then presented for the SCW desulfurization of hexyl sulfide. Comprehensive kinetic mechanisms for these larger molecules are likely to include thousands of reactions, so RMG builds this model in a systematic and unbiased way using a database of ab initio data. This database is expanded with potentially relevant thermochemical and kinetic parameters using transition state theory and quantum chemical calculations at the CBS-QB3 and CCSD(T)-F12 levels of theory. With these data, as well as previously calculated rates for hydrocarbon and sulfur kinetics, RMG is used to build a reaction mechanism for the conversion of hexyl sulfide to hydrogen sulfide, pentane, and carbon monoxide in the presence of SCW. This mechanism is validated with results from batch and flow reactor experiments, and predictions are accurate within a factor of two for reactant and major product concentrations. Analysis of the proposed mechanism shows that the molecular addition of water to the carbonsulfur double-bond in hexanethial is a key step in the SCW process, as this not only leads to the desulfurization of the compound, but also prevents the thioaldehyde from undergoing addition reactions with other hydrocarbons in a process that could eventually form coke. Thus, this work not only has implications in the SCW desulfurization process, but in the overall crude oil upgrading process as well. The calculated kinetic and thermochemical parameters are used to generate predictive reaction mechanisms for other processes relevant in fuel chemistry, such as the geological formation of oil and gas from kerogen. This not only allows us to model experimental work investigating the effect sulfur compounds have on the oil-to-gas process, but we also explore how these effects differ at geological conditions and timescales. And as the possible applications of RMG grow, the need for accurate parameters in mechanism generation become even more critical. A thermochemical database is generated for a wide variety of sulfur compounds using the highaccuracy CCSD(T)-F12/cc-pVTZ-F12 method, and this provides a basis for the investigation of organosulfur chemistry with tighter uncertainty.
by Caleb Andrew Class.
Ph. D.
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Ramesha, A. R. "Organosulfur Reactions In Organic Synthesis With Tetrathiomolybdate." Thesis, Indian Institute of Science, 1994. http://hdl.handle.net/2005/107.

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Recent years have seen a dramatic expansion in synthetic and structural molybdenum - sulfur chemistry. The amplest binary Mo-S moiety in MO$ ion. The thromolybdates derived by sulfur substitution from the 0x0 analogue have interesting chemical properties. Although they have been studied extensively by synthetic inorganic chemists and bio-inorganic chemists as models for enzymes like introgenases, their reactivity towards organic substrates remamed unexplored.
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Shepherd, S. D. "Chemical and enzymatic synthesis of organosulfur compounds." Thesis, Anglia Ruskin University, 2002. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.396225.

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Hendrickx, Ramon Adriaan Antonius Johannes Hendrickx. "Mechanistic studies of organosulfur oxidations by dimethyldioxirane." Thesis, University of York, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.399615.

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Murray, Jane. "Selective oxidation of organosulfur substrates by hydrogen peroxide." Thesis, University of York, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.428461.

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Savoie, Paul R. "Preparation, chemistry, and characterization of hypervalent organosulfur fluorides." Thesis, State University of New York at Albany, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=3739734.

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Since the discovery of the pentafluorosulfanyl (SF5) group around the 1960s, progress in exploring the chemistry of aliphatic SF 5-containing compounds stagnated because of a lack of efficient synthetic methods. More recent developments in the preparations of SF5-containing compounds afforded easier access to these compounds, and sparked great interest in exploring their chemistry. Chapter 1 discusses the development of efficient methods used to prepare SF5-containing aliphatic compounds.

This dissertation investigates the combination of steric and polar effects of pentafluorosulfanylation on aliphatic molecules. Chapter 2 discusses the synthesis and chemistry of aliphatic aldehydes and aldimines containing the SF5 group in the 2-position. The aldehydes undergo many of the common chemical transformations of aliphatic aldehydes, affording a variety of SF5-containing compounds. The large C–S bond dipole helps direct additions to the carbonyl group in a manner consistent with the Cornforth hypothesis, resulting in highly diastereoselective nucleophilic additions. Similarly, the synthesis of SF5-containing SF5β-lactams by [2+2] cycloadditions of 2-pentafluorosulfanylaldimines with azidoketene proceeds with high diastereofacial selectivity. The SF5 β-lactams formed by this reaction may lead to a greater variety of diastereoselectively-prepared amino acid compounds for study in peptides, the preparation of new antibacterial compounds, and the design of novel SF5 β-lactamase inhibitors.

Chapter 3 discusses the structural studies of some synthesized pentafluorosulfanylated molecules to help further elucidate the steric and polar effects of pentafluorosulfanylation on aliphatic compounds. Coupling constant analyses determined the local molecular structure near the SF5 group and revealed that the unexpected diastereotopic resonances in 1H NMR spectra were the result of partial insertion of a hydrogen atom between two equatorial fluorine atoms, thus “locking” the conformation of the alkyl chain near the SF5 group. Computational experiments confirmed the experimentally-determined S–C–C–O dihedral angle of 85° observed in the alcohols formed by nucleophilic addition to the aldehyde carbonyl group of 2-pentafluorosulfanyl aldehydes. Computation of the reaction profile for the [2+2] cycloaddition of 2-pentafluorosulfanylaldimines with azidoketene revealed a difference in the reaction barriers leading to the two diastereomeric pairs of products of about 4.1 kcal/mol. Formation of the 1,2-lk,lk products is favored over the formation of the other possible products.

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Brooks, Andrew C. "The preparation of organosulfur derived electron transfer salts." Thesis, Nottingham Trent University, 2009. http://irep.ntu.ac.uk/id/eprint/284/.

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The concept of this thesis is to effect greater control over the crystalline state of radical cation salts in order to enhance electron transport, and to allow for the incorporation of additional functionality such as optical activity or magnetism. The salts formed are based on the bis(ethylenedithio)tetrathiafulvalene (BEDT-TTF or ET) framework, and are produced using the technique of electrocrystallisation. In attempts to control the crystal packing arrangements observed, a number of approaches have been explored including the incorporation of chirality, hydrogen bonding interactions and coordinate bonding interactions. These properties have been installed on the electron donor molecule and/ or the charge stabilising anion component. This thesis presents a novel radical cation salt that has been prepared from ET and the sulfamate anion, and which exhibits ordered channels of hydrogen bonded anions and water molecules extending in one crystallographic dimension. This research has also discovered an unusual chiral crystallographic packing observed in a novel semiconducting radical cation salt formed from ET and the bromide anion. Also presented are the synthesis of a family of metal-binding electron donors and the first radical cation salts formed from these, including a perrhenate salt which is both N-protonated and oxidised, giving an overall charge of +2 on the electron donor molecule. A group of novel aldehyde-functionalised donors are discussed, one of which could lead to a Little-type superconductor, and the syntheses towards a bis(donor) molecule containing a spiro centre, and separately a porphyrin appended electron donor are presented.
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Books on the topic "Organosulfur"

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Organosulfur chemistry. Oxford: Oxford University Press, 1995.

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B, Page Philip C., ed. Organosulfur chemistry. Berlin: Springer, 1999.

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Cremlyn, R. J. W. An introduction to organosulfur chemistry. Chichester: Wiley, 1996.

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Page, Philip C. B., ed. Organosulfur Chemistry I. Berlin, Heidelberg: Springer Berlin Heidelberg, 1999. http://dx.doi.org/10.1007/3-540-48956-8.

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Page, Philip C. B., ed. Organosulfur Chemistry II. Berlin, Heidelberg: Springer Berlin Heidelberg, 1999. http://dx.doi.org/10.1007/3-540-48986-x.

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Saul, Patai, and Rappoport Zvi, eds. The Chemistry of sulphur-containing functional groups. Chichester [England]: Wiley, 1993.

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István, Hargittai. The structure of volatile sulphur compounds. Dordrecht, Holland: D. Reidel, 1985.

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I, Gusarʹ N., and Fokin A. V, eds. Sulʹfenilkhloridy. Moskva: "Nauka", 1989.

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International Symposium on Organic Sulfur Chemistry (13th 1988 Odense, Denmark). Developments in the organic chemistry of sulfur: Proceedings of the XIII International Symposium on the Organic Chemistry of Sulfur, 7-12 August, 1988, Odense, Denmark. New York: Gordon and Breach, 1989.

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A, Maletina E., Roman V. K, and Volʹpin M. E, eds. Kremnekislorodnye soedinenii͡a︡ nemetallov: Proizvodnye kisloroda i sery. Novosibirsk: "Nauka," Sibirskoe otd-nie, 1991.

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Book chapters on the topic "Organosulfur"

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Furka, Árpád. "Organosulfur Compounds." In SpringerBriefs in Molecular Science, 69–80. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-06004-6_5.

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Mikołajczyk, Marian, and Jozef Drabowicz. "Chiral Organosulfur Compounds." In Topics in Stereochemistry, 333–468. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2007. http://dx.doi.org/10.1002/9780470147221.ch5.

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Lea, Michael A. "Organosulfur Compounds and Cancer." In Advances in Experimental Medicine and Biology, 147–54. Boston, MA: Springer US, 1996. http://dx.doi.org/10.1007/978-1-4613-0399-2_12.

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Bischoff, Karyn. "Glucosinolates and Organosulfur Compounds." In Nutraceuticals in Veterinary Medicine, 113–19. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-030-04624-8_9.

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Rauchfuss, T. B. "With Organosulfur Anions [RS]-." In Inorganic Reactions and Methods, 109–15. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2007. http://dx.doi.org/10.1002/9780470145203.ch85.

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Zhao, Ming Ming, Shi Hang Xiong, Guan Ding Zhao, and Hua Yu. "Organosulfur Compounds in Food." In Handbook of Dietary Phytochemicals, 1–21. Singapore: Springer Singapore, 2019. http://dx.doi.org/10.1007/978-981-13-1745-3_41-1.

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Zhao, Ming Ming, Shi Hang Xiong, Guan Ding Zhao, and Hua Yu. "Organosulfur Compounds in Food." In Handbook of Dietary Phytochemicals, 1741–61. Singapore: Springer Singapore, 2021. http://dx.doi.org/10.1007/978-981-15-4148-3_41.

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Sagdic, Osman, and Fatih Tornuk. "Antimicrobial Properties of Organosulfur Compounds." In Dietary Phytochemicals and Microbes, 127–56. Dordrecht: Springer Netherlands, 2012. http://dx.doi.org/10.1007/978-94-007-3926-0_4.

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Towl, A. D. C. "In Hydrolyses of Organosulfur Compounds." In Inorganic Reactions and Methods, 186. Hoboken, NJ, USA: John Wiley & Sons, Inc., 2007. http://dx.doi.org/10.1002/9780470145159.ch122.

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White, Curt M., L. J. Douglas, R. R. Anderson, C. E. Schmidt, and R. J. Gray. "Organosulfur Constituents in Rasa Coal." In Geochemistry of Sulfur in Fossil Fuels, 261–86. Washington, DC: American Chemical Society, 1990. http://dx.doi.org/10.1021/bk-1990-0429.ch016.

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Conference papers on the topic "Organosulfur"

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Matzka, Marco, Marianna Lucio, Basem Kanawati, Eric Quirico, Lydie Bonal, Stefan Loehle, and Philippe Schmitt-Kopplin. "Profiling of magnesium organosulfur chemistry in meteorites." In Goldschmidt2021. France: European Association of Geochemistry, 2021. http://dx.doi.org/10.7185/gold2021.4692.

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Rahman, Ramees K., Abhijeet G. Raj, and Salisu Ibrahim. "Formation of Mercaptans and Organosulfur Species in Claus Process." In Abu Dhabi International Petroleum Exhibition & Conference. Society of Petroleum Engineers, 2017. http://dx.doi.org/10.2118/188255-ms.

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Hsu, C. W., David P. Baldwin, Chung-Lin Liao, and Cheuk Yiu Ng. "Nonresonant two-photon pulsed field ionization studies of organosulfur molecules and radicals." In OE/LASE '94, edited by John W. Hepburn. SPIE, 1994. http://dx.doi.org/10.1117/12.178108.

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Ahillah, Nurul, Sri Rahayu Lestari, and Abdul Gofur. "Single bulb garlic organosulfur compounds in inhibiting angiotensin-converting enzyme (ACE) as hypertension therapeutic strategies: An in silico study." In INTERNATIONAL CONFERENCE ON LIFE SCIENCES AND TECHNOLOGY (ICoLiST 2020). AIP Publishing, 2021. http://dx.doi.org/10.1063/5.0052658.

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Sa'adah, Nur Alfi Maghfirotus, Bella Aulia, Dimas Nur Ramadhani, Maria Dwi Cahyani, Muhammad Mauludi Zulkifli, Siti Nur Arifah, Mochammad Fitri Atho'illah, Sri Rahayu Lestari, and Abdul Gofur. "In silico study of potential organosulfur and flavonoids compounds in garlic (Allium sativum L.) as inhibitor of α-glucosidase enzyme." In THE 4TH INTERNATIONAL CONFERENCE ON LIFE SCIENCE AND TECHNOLOGY (ICoLiST). AIP Publishing, 2023. http://dx.doi.org/10.1063/5.0113522.

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Sumei, Li, Shi Quan, Zhang Hongan, Xu Tianwu, Chen Xianfei, and Ji Hong. "Characteristics and Significances of Organosulfur Compounds in Typical Saline Lacustrine Oils From Bohai Bay Basin Identified by ESI FT-ICR MS." In 29th International Meeting on Organic Geochemistry. European Association of Geoscientists & Engineers, 2019. http://dx.doi.org/10.3997/2214-4609.201902795.

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Sundararajan, Desikan, and Abdul-Majeed Azad. "Development of Logistic Fuel Desulfurizers Endowed With Nanoartifacts." In ASME 2008 6th International Conference on Fuel Cell Science, Engineering and Technology. ASMEDC, 2008. http://dx.doi.org/10.1115/fuelcell2008-65138.

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Sulfur content in the logitstic fuels such as diesel, jet fuel and coal poses great challenge, as it leads to severe deactivation and poisioning of the reforming catalysts. The utilization of logistic fuel in high efficiency fuel cells as hydrogen-rich reformates, therefore, necessitates that the sulfur (mostly present as organosulfur species) be either eliminated totally, or its level be reduced below such levels as not to mitigate the long-term sustained performance of the reforming catalysts. Besides, SOFC anodes are also quickly poisoned by sulfur present even in trace amounts (1–2 ppm). Thus, desulfurization becomes an important and integral component in harnessing clean power from these abundunt fuel resources. Recently, we have developed a series of novel sulfur sorbents with agile scavengers dispersed thoroughly and uniformly on lightweight, highly periodic nanoporous biomimetic or zeolitic inert matrices. These formulations have been tested in a range of temperatures for durations ranging from 12 to 100 hours in sulfur-bearing gas streams. In this presentation, their synthesis, characterization (before and after sulfidation) by XRD, SEM/EDS, RBSE imaging, on-line real-time quantification in gas chromatography in conjunction with systematic chemical analyses to gauge their efficacy in sulfur removal will be discussed.
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Apitz Castro, R., E. Ledezma, A. Jorquera, and M. K. Jain. "REVERSIBLE BLOCKADE OF PLATELET ACTIVATION DURING CARDIO-PUIMONAR BYPASS IN DOGS AFTER IV ADMINISTRATION OF AJOENE." In XIth International Congress on Thrombosis and Haemostasis. Schattauer GmbH, 1987. http://dx.doi.org/10.1055/s-0038-1644820.

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Surgery with extracorporeal circulation (ECC) is associated with platelet activation, which greatly contribute to prolonged postoperative bleeding and increased blood loss after surgery. Antiplatelet ccnpounds which induce rapid and reversible inhibition of platelet function, without affecting platelet adhesiveness would be potentially useful in the management of the platelet-dependent hemostatic disorder observed in ECC. Ajoene, an organosulfur originally obtained from garlic, inhibits platelet release and aggregation induced ex vivo by all know agonists. It does not affect shape change or adhesion to collagen nor interfere with metabolic pathways relevant to the platelet reaction. Ajoene action is related to its direct interaction with the fibrinogen receptor on the platelet surface which irrpairs fibrinogen binding to stimulated or chymotrypsin treated platelets. IV administration of ajoene (15 mg/Kg) to mongrel dogs, inhibits platelet aggregation induced ex vivo by collagen (2-5 g/ml) or ADP (10 M). Ccnplete inhibition is attained after 20-35min and recuperation of platelet reactivity is obtained after 2.5-3.5 hours. To study the potential benefit of ajoene for the prevention of platelet activation during cardio-pulnonary bypass, ajoene was administered to anesthesized (heparin-anticoagulated) dogs, as described above, 40min before establishing the ECC. Circulation was mantained at 1.5L/min for a period of lOOmin Platelet count, and aggregation induced esc vivo by ADP or collagen were meassured immediately before ajoene administration, lOmin after the end of ECC and thereafter, hourly. Platelet count lOmin after end of ECC, in ncn-treated dogs fell to about 57% of prepump values, while in ajoene-treated animals circulating platelets represented 80% of pre-ECC values. Recovery of platelet function in ajoene-treated dogs started 2 hr after end of ECC (about 4 hr. after ajoene administration) reaching 70% 4 hr after end of ECC. Surgical bleeding in treated-dogs was not different frrm controls. Moderate bradicardia and hypotension, which in atrqpi-nized dogs returned to normal values within 3 min was observed. Although detailed pharmacological studies are still needed, our results suggest that ajoene is a potentially useful drug for the prevention of platelet activation induced by ECC.
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Salimi, Hamidreza, Maryam Namdar Zanganeh, Sven McCarthy, Lucian Pirlea, Jurriaan Nortier, Dario Frigo, Haitham Balushi, Mustafa Lawati, and Mohamed Yarabi. "A Quantitative and Predictive Reservoir-Souring Approach to Assess Reservoir-Souring Risk During Waterflood Development." In SPE Conference at Oman Petroleum & Energy Show. SPE, 2022. http://dx.doi.org/10.2118/200087-ms.

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Abstract Souring potentials of fields during planned-/ongoing-waterflood development need to be investigated to enable the selection of the injection-water source and facility-design options. This paper presents the application of a novel reservoir-souring approach to assess the souring potential of two Middle-East fields (S and T), to recommend ways to prevent and/or reduce H2S production, and to determine the optimum solution for injection water. The novel approach includes fluid sampling and analysis, a desktop study, a dynamic-reservoir simulation, and a surface-facility evaluation. In the desktop study, a qualitative assessment of souring associated with injection-water sources (produced water and/or aquifer water) and reservoir characteristics and mitigation strategies to limit future H2S concentrations were carried out. Subsequently, a compositional non-isothermal dynamic model that includes 3 phases, 18 components, and 18 reactions was developed to quantitatively predict the most-likely and the worst-case H2S levels over the fields’ life. Several sensitivity runs were performed to assess the impact of the key uncertain parameters on the H2S level. The desktop study concluded that the produced H2S from field S has a non-microbial external source, which is likely to be derived from thermal cracking of organosulfur compounds at depth and migrated into the reservoir from the Huqf source rocks. This thermally-generated H2S is presented with an initial background H2S level in the formation water in the simulations. The Base-Case-Scenario results reveal that in the S field with the background H2S level (350 ppmv), the level of H2S increases to 1000 ppmv after injection-water breakthrough because of the addition water-induced microbial souring. In the T field without background H2S levels, the level of microbial H2S reaches 195 ppmv in year 2044 at a water cut of 95%. The results of the Worst-Case Scenarios indicate that if the VFA content is significantly underestimated and the abstraction capacity is overestimated in the Base-Case Scenarios, the risk of microbial souring would be high in the S and T fields when injecting low-salinity Fars-aquifer water. In the Worst-Case Scenarios, the gas-phase H2S concentration attains max values of 3,400 and 1,200 ppmv, respectively, for the S and T fields. Analysis of the microbial-souring mitigation options suggest that injecting the high-salinity produced-water re-injection (PWRI) at the station—being the most robust microbial-souring-prevention method available—is the best mitigation option in the T and S fields and its effectivity and efficiency are far superior to nitrate injection. In the Worst-Case Scenario, PWRI effectively hampers the generation and production of microbial H2S and maintains the H2S concentration in the produced gas around the background H2S level. Although PWRI is not an option for the S and T fields and there is no infrastructure in place for transferring the station-PWRI to the S and T fields, further analysis might justify this change of plans.
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Hosseini, S. H., S. Poetz, B. Horsfield, H. Wilkes, O. Kavak, and M. N. Yalçın. "Insights into Aromatic Organosulphur Compounds in Solid Bitumen and Heavy Oils from Southeast Turkey." In 29th International Meeting on Organic Geochemistry. European Association of Geoscientists & Engineers, 2019. http://dx.doi.org/10.3997/2214-4609.201902836.

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Reports on the topic "Organosulfur"

1

Ternay, Andrew L., and Jr. Organosulfur Compounds as ChemDefense Agents - Mustard. Fort Belvoir, VA: Defense Technical Information Center, September 2001. http://dx.doi.org/10.21236/ada409740.

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Hsu, Chia-Wei. Photodissociation and photoionization of organosulfur radicals. Office of Scientific and Technical Information (OSTI), May 1994. http://dx.doi.org/10.2172/10190413.

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Ruscic, B., and J. Berkowitz. Photoionization studies of organosulfur transient species. Office of Scientific and Technical Information (OSTI), March 1994. http://dx.doi.org/10.2172/10132759.

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Woods, Nina Tani. Characterization of organosulfur monolayer formation at gold electrodes. Office of Scientific and Technical Information (OSTI), August 1996. http://dx.doi.org/10.2172/383576.

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Cheung, Yu San. Single- and multi-photon ionization studies of organosulfur species. Office of Scientific and Technical Information (OSTI), February 1999. http://dx.doi.org/10.2172/350831.

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Purdy, R. F., B. Ward, and J. E. Lepo. Microbial extraction of sulfur from model coal organosulfur compounds. Office of Scientific and Technical Information (OSTI), December 1991. http://dx.doi.org/10.2172/10175584.

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Kilbane, J. J. II. Microbial strain improvement for organosulfur removal from coal. [Rhodococcus rhodochrous]. Office of Scientific and Technical Information (OSTI), January 1991. http://dx.doi.org/10.2172/5792238.

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Eliel, Ernest L. Neighboring Group Participation in Solvolysis of Organosulfur and Related Compounds. Fort Belvoir, VA: Defense Technical Information Center, August 1985. http://dx.doi.org/10.21236/ada161458.

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Kilbane, J. J. II. Microbial strain improvement for organosulfur removal from coal. Technical report, September 1--November 30, 1991. Office of Scientific and Technical Information (OSTI), December 1991. http://dx.doi.org/10.2172/10122904.

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Kilbane, J. J. II, and K. Ho. Microbial strain improvement for organosulfur removal from coal. Technical report, December 1, 1992--February 28, 1993. Office of Scientific and Technical Information (OSTI), May 1993. http://dx.doi.org/10.2172/10149989.

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