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Journal articles on the topic 'Sulfur compounds'

Author: Grafiati

Published: 4 June 2021

Last updated: 15 March 2025

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1

Arisawa, Mieko, and Masahiko Yamaguchi. "Rhodium-Catalyzed Synthesis of Organosulfur Compounds using Sulfur." Synlett 30, no. 14 (July 2, 2019): 1621–31. http://dx.doi.org/10.1055/s-0037-1611867.

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Sulfur is one of the few elements that occurs uncombined in nature. Sulfur atoms are found in natural amino acids and vitamins. In the chemical industry, organosulfur compounds are used for fabricating rubber, fibers, and dyes, pharmaceuticals, and pesticides. Although sulfur, which is cheap and easy to handle, is a useful source of sulfur atom in functional organosulfur compounds, it is rarely used in organic synthesis. Activation of sulfur by high temperature, light irradiation, treatment with nucleophiles and electrophiles, and redox conditions often results in the formation of various active sulfur species, which complicate reactions. The development of a method that mildly activates sulfur is therefore desired. The use of transition-metal catalysts is a new method of activating sulfur under mild conditions, and, in this article, we describe the rhodium-catalyzed synthesis of various organosulfur compounds by the insertion of sulfur atoms into single bonds and by the addition of sulfur to unsaturated bond in various organic compounds.1 Introduction2 Sulfur Activation without using Transition Metal3 Transition-Metal-Catalyzed Activation of Sulfur4 Rhodium-Catalyzed Reactions using Sulfur4.1 Rhodium-Catalyzed Sulfur Atom Exchange Reactions using Sulfur4.2 Synthesis of Diaryl Sulfides using Rhodium-Catalyzed Exchange Reaction of Aryl Fluorides and Sulfur/Organopolysulfides4.3 Rhodium-Catalyzed Synthesis of Isothiocyanate using Sulfur4.4 Rhodium-Catalyzed Sulfur Addition Reaction to Alkenes for Thiiranes Synthesis4.5 Rhodium-Catalyzed Sulfur Addition Reaction to Alkynes for 1,4-Dithiins Synthesis5 Conclusion

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2

Wanikawa, Akira, and Toshikazu Sugimoto. "A Narrative Review of Sulfur Compounds in Whisk(e)y." Molecules 27, no. 5 (March 3, 2022): 1672. http://dx.doi.org/10.3390/molecules27051672.

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The production process of whisky consists of malting, mashing, fermentation, distillation and maturation. Sulfur volatile compounds generated during this process have long attracted interest because they influence quality in general. More than forty compounds have been reported: they are formed during malting, fermentation, and distillation, but some may decrease in concentration during distillation and maturation. In sensory analysis, sulfur characteristics are described as sulfury, meaty, cereal, feinty, and vegetable, among others. Their contribution to overall quality depends on their concentration, with a positive contribution at low levels, but a negative contribution at high levels. Chemical analyses of sulfur volatiles have been developed by using sulfur-selective detectors and multi-dimensional gas chromatography to overcome the numerous interferences from the matrix. Formation pathways, thresholds, and contribution have not been elucidated completely; therefore, methods for integrating diverse data and knowledge, as well as novel technical innovations, will be needed to control sulfur volatiles in the future.

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3

Wu, Mingqing, Chunyan Chang, Tao Li, Jian Zhou, and Liping Zhao. "Characterization of Sulfur Compounds in MTBE." Journal of Fuels 2015 (June 21, 2015): 1–11. http://dx.doi.org/10.1155/2015/360790.

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A study is carried out on chemical constitution of sulfur compounds in MTBE and their formation mechanisms. These sulfur compounds are classified into three types: common sulfur compounds, newly formed sulfur compounds, and high boiling sulfur compounds. Common sulfur compounds which include mercaptans, low molecule sulfides and disulfides, are directly from C4, one of the stocks for production of MTBE. The newly formed sulfur compounds, with one sulfur atom and five or more total carbon atoms in one molecule, are mainly tert-butyl methyl sulfide and tert-butyl ethyl sulfide, thioetherification products of thiols with butenes. Many high boiling sulfur compounds, including polysulfides such as dimethyl trisulfide, multisulfur heterocyclic compounds such as 3,5-dimethyl-1,2,4-trithiolane, and oxygen-containing sulfur compounds such as 2-methoxy-3-methylthio-butane, are also found newly formed in the processes of LPG refining and succedent etherification reaction for producing MTBE. Polysulfides are additional products of elemental sulfur to disulfides, and other high boiling sulfur compounds may be formed by thiols reacting with dienes.

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4

Nwachukwu, Ifeanyi D., Alan J. Slusarenko, and Martin C. H. Gruhlke. "Sulfur and Sulfur Compounds in Plant Defence." Natural Product Communications 7, no. 3 (March 2012): 1934578X1200700. http://dx.doi.org/10.1177/1934578x1200700323.

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The multiplicity of chemical structures of sulfur containing compounds, influenced in part by the element's several oxidation states, directly results in diverse modes of action for sulfur-containing natural products synthesized as secondary metabolites in plants. Sulfur-containing natural products constitute a formidable wall of defence against a wide range of pathogens and pests. Steady progress in the development of new technologies have advanced research in this area, helping to uncover the role of such important plant defence molecules like endogenously-released elemental sulphur, but also deepening current understanding of other better-studied compounds like the glucosinolates. As studies continue in this area, it is becoming increasingly evident that sulfur and sulfur compounds play far more important roles in plant defence than perhaps previously suspected.

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5

Maksimov, A. M., V. V. Kireenkov, and V. E. Platonov. "Organofluorine sulfur-containing compounds." Russian Chemical Bulletin 45, no. 1 (January 1996): 153–55. http://dx.doi.org/10.1007/bf01433751.

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6

Kalugin, V. E., and A. M. Shestopalov. "Functional sulfur-containing compounds." Russian Chemical Bulletin 57, no. 10 (October 2008): 2139–45. http://dx.doi.org/10.1007/s11172-008-0290-6.

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7

Takahashi, Hideyuki, Eiichiro Matsubara, Rodion Vladimirovich Belosludov, Seijiro Matsubara, Nobuaki Sato, Atsushi Muramatsu, Yoshiyuki Kawazoe, and Kazuyuki Tohji. "Fullerene and Sulfur Compounds." MATERIALS TRANSACTIONS 43, no. 7 (2002): 1530–32. http://dx.doi.org/10.2320/matertrans.43.1530.

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8

TOKUNO, KENJI, YUKARI ASAO, FUMIHISA MIYOSHI, YUKIE SAWADA, and TSUTOMU OHASHI. "Organic Sulfur Compounds. XII." YAKUGAKU ZASSHI 106, no. 3 (1986): 187–92. http://dx.doi.org/10.1248/yakushi1947.106.3_187.

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9

TOKUNO, KENJI, YUKARI ASAO, FUMIHISA MIYOSHI, YUKIE SAWADA, and TSUTOMU OHASHI. "Organic Sulfur Compounds. XIII." YAKUGAKU ZASSHI 106, no. 3 (1986): 193–98. http://dx.doi.org/10.1248/yakushi1947.106.3_193.

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10

Harborne, Jeffrey B. "Sulfur compounds in foods." Phytochemistry 39, no. 4 (July 1995): 954–55. http://dx.doi.org/10.1016/0031-9422(95)90335-6.

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11

VASCONCELOS, Adriana Palmeiro, and Sérgio Machado CORRÊA. "SULFUR COMPOUNDS IN MIXING DIESEL AND BIODIESEL." Periódico Tchê Química 05, no. 10 (August 20, 2008): 51–57. http://dx.doi.org/10.52571/ptq.v5.n10.2008.agosto/7_pgs_51_57.pdf.

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The mixing of biodiesel and petroleum diesel is being widely used as an attempt to reduce the emissions of sulfur compounds. These compounds are responsible for pollution, causing several diseases, like some breath problems. Sulfur compounds cause car catalyst poisoning and deactivation of processing, contributing to undesirable emissions of other toxic compounds. The goal of this work was to identify sulfur compounds in diesel and in some biodiesel mixtures of different sources. Gas chromatography system coupled with FID (flame ionization detector) was the methodology initially employed, for adjustment of the operational conditions, since FID is a low selectivity detector capable of identifying sulfur compounds and the majority of hydrocarbons. After that, a selective detector for sulfur compounds was employed (SCD - sulfur chemiluminescence detector). The results showed that sulfur compounds decreased proportionally with the addition of biodiesel.

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12

Mathew, Varughese, and Sheila Chopin. "High-Temperature Reliability of Copper Wire-Bonded Packages Encapsulated with Mold Compounds Containing Sulfur Compounds." Journal of Microelectronics and Electronic Packaging 12, no. 4 (October 1, 2015): 226–31. http://dx.doi.org/10.4071/imaps.469.

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Cu wire-bonded (CuWB) packaging is more susceptible to corrosion than traditional inert gold wires. CuWB reliability greatly depends on the compatibility of Cu wire with the surrounding encapsulating mold compound as this matrix can provide a corrosive environment leading to reliability issues. Many mold compounds contain specific components, which are sulfur-based compounds. Since the reliability testing of an encapsulated packaged device involves thermal treatments, such as the high-temperature storage life (HTSL) test, there is a concern that corrosive sulfur compounds can be produced at high temperatures (e.g., 150°C and 175°C), endangering CuWB reliability. This article describes detection methods of sulfur compounds produced from mold compounds, if any, at high temperatures such as 175°C and CuWB die package reliability with mold compounds containing sulfur compounds. The dynamic headspace concentration-gas chromatography-mass spectroscopy analysis technique was used to test liberation of gaseous and volatile sulfur compounds from mold compounds at temperatures 25°C, 150°C, 175°C, and 200°C. No gaseous sulfur compounds were detected by chromatographic methods within the time period of the experiments. To determine sulfur-containing anionic species present in the mold compound matrix, such as sulfide, sulfite, sulfate, and thiosulfate, ionic compounds were extracted to water and analyzed by ion chromatography. Upon analysis, the only sulfur-bearing anion found in the samples was sulfate. Thermally treated mold compounds for 2,000 h at 150°C and for 1,000 h at 175°C were also extracted and analyzed to determine possible decomposition of sulfur compounds due to the thermal aging process. Corrosion due to sulfur compounds and reliability of CuWB was evaluated by HTSL for 2,000 h at temperatures of 150°C and 175°C with devices packaged with mold compounds containing sulfur compounds. CuWB ball bond-Al interface and Cu stitch bond integrity were evaluated by focused ion beam-scanning electron microscopy with energy-dispersive x-ray spectroscopic analysis and wire pull and ball shear testing of CuWB ball bonds. No reliability issues due to sulfur compounds were found with mold compounds containing sulfates up to ∼45 ppm.

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13

Mathew, Varughese, and Sheila Chopin. "High Temperature Reliability of Copper Wire - Bonded Packages Encapsulated with Mold Compounds Containing Sulfur compounds." International Symposium on Microelectronics 2014, no. 1 (October 1, 2014): 000477–82. http://dx.doi.org/10.4071/isom-wa42.

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Copper wire-bonded (CuWB) packaging is more susceptible to corrosion than traditional inert gold wires. CuWB reliability greatly depends on the compatibility of Cu wire with the surrounding encapsulating mold compound as this matrix can provide a corrosive environment leading to reliability issues. Many mold compounds contain specific components which are sulfur-based compounds. Since the reliability testing of an encapsulated packaged device involves thermal treatments such as high temperature storage life (HTSL) test, there is a concern that corrosive sulfur compounds can be produced at high temperatures, e.g. 150 °C and 175 °C, endangering CuWB reliability. This paper describes methods of detection of sulfur compounds produced from mold compounds, if any, at high temperatures such as 175 °C and CuWB die package reliability with mold compounds containing sulfur compounds. Dynamic Headspace Concentration-Gas Chromatography–Mass Spectroscopy (DHC-GC-MS) analysis technique was used to test liberation of gaseous and volatile sulfur compounds from mold compounds at temperatures 25 °C, 150 °C, 175 °C, and 200 °C. No gaseous sulfur compounds were detected by chromatographic methods within the time period of the experiments. In order to determine sulfur containing anionic species present in the mold compound matrix, such as sulfide, sulfite, sulfate and thiosulfate, ionic compounds were extracted to water and analyzed by Ion Chromatography. Upon analysis, the only sulfur bearing anion found in the samples was sulfate. Thermally treated mold compounds for 2000 hours at 150 °C and 1000 hours at 175 °C were also extracted and analyzed to determine possible decomposition of sulfur compounds due to the thermal aging process. Corrosion due to sulfur compounds and reliability of CuWB (bare Cu-25 μm wire diameter) were evaluated by HTSL for 2000 hours at temperatures of 150 °C and 175 °C with devices packaged with mold compounds containing sulfur compounds. CuWB ball bond – Al interface and Cu stitch bond integrity were evaluated by FIB (Focused Ion Beam) - SEM (Scanning Electron Microscope) with EDX (energy dispersive X-ray spectrometer) analysis and wire pull and ball shear testing of CuWB ball bonds. No reliability issues due to sulfur compounds were found with mold compounds containing sulfates up to about 45 ppm.

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14

Milner, John A. "Preclinical Perspectives on Garlic and Cancer." Journal of Nutrition 136, no. 3 (March 1, 2006): 827S—831S. http://dx.doi.org/10.1093/jn/136.3.827s.

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ABSTRACT Evidence continues to point to the anticancer properties of fresh garlic extracts, aged garlic, garlic oil, and a number of specific organosulfur compounds generated by processing garlic. These anticarcinogenic and antitumorigenic characteristics appear to arise through both dose- and temporal-related changes in a number of cellular events involved with the cancer process, including those involving drug metabolism, immunocompetence, cell cycle regulation, apoptosis, and angiogenesis. The ability of garlic and related allyl sulfur compounds to block tumors in the colon, lung, breast, and liver suggests general mechanisms that are not tissue specific. Whereas relatively few studies have compared the relative efficacy of water- and lipid-soluble allyl sulfur compounds, those that have when using chemically induced carcinogen models suggest little difference in response, whereas tumor proliferation/apoptosis is highly dependent on the species provided. A shift in sulfhydryl groups, alterations in glutathione:oxidized glutathione ratios, and resultant changes in cellular redox status may be involved in some of the phenotypic changes caused by allyl sulfur compounds. Such changes in thiols by allyl sulfurs may also account for the observed hyperphosphorylation of specific cell cycle proteins and the histone hyperacetylation that has been correlated with suppressed tumor cell proliferation. Whereas the anticarcinogenic and antitumorigenic data to date are impressive, additional studies are needed with more modest exposure to allyl sulfur compounds over prolonged periods. Likewise, additional studies are needed that incorporate transgenic and knockout models to assist in the identification of molecular targets for garlic and its associated allyl sulfur components.

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15

Barce Ferro, Criscieli Taynara, Beatriz Fuzinato dos Santos, Caren Daniele Galeano da Silva, George Brand, Beatriz Amaral Lopes da Silva, and Nelson Luís de Campos Domingues. "Review of the Syntheses and Activities of Some Sulfur-Containing Drugs." Current Organic Synthesis 17, no. 3 (June 9, 2020): 192–210. http://dx.doi.org/10.2174/1570179417666200212113412.

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Background: Sulfur-containing compounds represent an important class of chemical compounds due to their wide range of biological and pharmaceutical properties. Moreover, sulfur-containing compounds may be applied in other fields, such as biological, organic, and materials chemistry. Several studies on the activities of sulfur compounds have already proven their anti-inflammatory properties and use to treat diseases, such as Alzheimer’s, Parkinson’s, and HIV. Moreover, examples of sulfur-containing compounds include dapsone, quetiapine, penicillin, probucol, and nelfinavir, which are important drugs with known activities. Objective: This review will focus on the synthesis and application of some sulfur-containing compounds used to treat several diseases, as well as promising new drug candidates. Results: Due to the variety of compounds containing C-S bonds, we have reviewed the different synthetic routes used toward the synthesis of sulfur-containing drugs and other compounds.

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16

Franz, Bettina, Thomas Gehrke, Henning Lichtenberg, Josef Hormes, Christiane Dahl, and Alexander Prange. "Unexpected extracellular and intracellular sulfur species during growth of Allochromatium vinosum with reduced sulfur compounds." Microbiology 155, no. 8 (August 1, 2009): 2766–74. http://dx.doi.org/10.1099/mic.0.027904-0.

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Before its uptake and oxidation by purple sulfur bacteria, elemental sulfur probably first has to be mobilized. To obtain more insight into this mobilization process in the phototrophic purple sulfur bacterium Allochromatium vinosum, we used HPLC analysis and X-ray absorption near-edge structure (XANES) spectroscopy for the detection and identification of sulfur compounds in culture supernatants and bacterial cells. We intended to identify soluble sulfur compounds that specifically occur during growth on elemental sulfur, and therefore compared spectra of cultures grown on sulfur with those of cultures grown on sulfide or thiosulfate. While various unexpected oxidized organic sulfur species (sulfones, C–SO2–C, and sulfonates, ) were observed via XANES spectroscopy in the supernatants, we obtained evidence for the presence of monosulfane sulfonic acids inside the bacterial cells by HPLC analysis. The concentrations of the latter compounds showed a tight correlation with the content of intracellular sulfur, reaching their maximum when sulfur began to be oxidized. None of the detected sulfur compounds appeared to be a specific soluble intermediate or product of elemental sulfur mobilization. It therefore seems unlikely that mobilization of elemental sulfur by purple sulfur bacteria involves excretion of soluble sulfur-containing substances that would be able to act on substrate distant from the cells.

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17

Yang, Yanli, and Qiaojing Zhao. "Analysis of aromatic hydrocarbon in medium- to high-sulfur coals from Fenxi, Shanxi Province." World Journal of Engineering 15, no. 6 (December 3, 2018): 786–91. http://dx.doi.org/10.1108/wje-07-2017-0179.

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Purpose This study aims to investigate the compositional characteristics of aromatic hydrocarbons extracted from coals and to describe how the sulfur content influences the properties of coals and whether widely accepted maturity parameters are suitable for medium- to high-sulfur coal. Design/methodology/approach Four samples of medium- to high-sulfur coal were obtained from Fenxi, Shanxi Province, and studied using gas chromatography and gas chromatography–mass spectrometry (GC-MS). Findings The GC-MS results showed that there were five series of compounds were identified in the aromatic fractions: naphthalenes, phenanthrenes, oxygen-containing compounds, biphenyls and sulfur-containing compounds. The substituent group was mainly methyl. The content of dibenzothiophenes was high, which was attributed to their high thermodynamic stability. The presence of sulfur reduced the content of oxygen-containing compounds. A depositional environment that facilitated the formation of organic sulfur compounds led to a higher content of naphthalenes. Originality/value The development of methods for removing organic sulfur compounds would benefit from a study of their nature, which would be important for improving the use of coal.

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18

Li, Zheng, Fei Pan, Wen Huang, Shuangshuang Gao, Xi Feng, Meijie Chang, Lianfu Chen, Yinbing Bian, Wenli Tian, and Ying Liu. "Transcriptome Reveals the Key Genes Related to the Metabolism of Volatile Sulfur-Containing Compounds in Lentinula edodes Mycelium." Foods 13, no. 14 (July 10, 2024): 2179. http://dx.doi.org/10.3390/foods13142179.

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Lentinula edodes (L. edodes) is a globally popular edible mushroom because of its characteristic sulfur-containing flavor compounds. However, the formation of the volatile sulfur-containing compounds in the mycelium of L. edodes has not been studied. We found that there were also sulfur-containing aroma compounds in the mycelium of L. edodes, and the content and composition varied at different stages of mycelial growth and development. The γ-glutamyl-transpeptidase (GGT) and cysteine sulfoxide lyase (C-S lyase) related to the generation of sulfur compounds showed the highest activities in the 15-day sample. Candidate genes for the metabolism of volatile sulfur compounds in mycelium were screened using transcriptome analysis, including encoding the GGT enzyme, C-S lyase, fatty acid oxidase, HSP20, and P450 genes. The expression patterns of Leggt3 and Leccsl3 genes were consistent with the measured activities of GGT and C-S lyase during the cultivation of mycelium and molecular dynamics simulations showed that they could stably bind to the substrate. Our findings provide insights into the formation of sulfur-containing flavor compounds in L. edodes. The mycelium of L. edodes is suggested for use as material for the production of sulfur-containing flavor compounds.

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19

Echizen, Honami, Eita Sasaki, and Kenjiro Hanaoka. "Recent Advances in Detection, Isolation, and Imaging Techniques for Sulfane Sulfur-Containing Biomolecules." Biomolecules 11, no. 11 (October 20, 2021): 1553. http://dx.doi.org/10.3390/biom11111553.

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Hydrogen sulfide and its oxidation products are involved in many biological processes, and sulfane sulfur compounds, which contain sulfur atoms bonded to other sulfur atom(s), as found in hydropersulfides (R-S-SH), polysulfides (R-S-Sn-S-R), hydrogen polysulfides (H2Sn), etc., have attracted increasing interest. To characterize their physiological and pathophysiological roles, selective detection techniques are required. Classically, sulfane sulfur compounds can be detected by cyanolysis, involving nucleophilic attack by cyanide ion to cleave the sulfur–sulfur bonds. The generated thiocyanate reacts with ferric ion, and the resulting ferric thiocyanate complex can be easily detected by absorption spectroscopy. Recent exploration of the properties of sulfane sulfur compounds as both nucleophiles and electrophiles has led to the development of various chemical techniques for detection, isolation, and bioimaging of sulfane sulfur compounds in biological samples. These include tag-switch techniques, LC-MS/MS, Raman spectroscopy, and fluorescent probes. Herein, we present an overview of the techniques available for specific detection of sulfane sulfur species in biological contexts.

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20

Matsuo, Hirotaka, Yu Hanamure, Rei Miyano, Yōko Takahashi, Satoshi Ōmura, and Takuji Nakashima. "Screening for Sulfur Compounds by Molybdenum-Catalyzed Oxidation Combined with Liquid Chromatography-Mass Spectrometry." Molecules 25, no. 2 (January 7, 2020): 240. http://dx.doi.org/10.3390/molecules25020240.

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The molybdenum (Mo)-catalyzed oxidation of sulfide under neutral conditions yields sulfone. This reaction proceeds more smoothly than olefin epoxidation and primary or secondary alcohol oxidation. In this study, Mo-catalyzed oxidation was used to screen for sulfur compounds (named “MoS-screening”) in microbial broths by liquid chromatography-mass spectrometry (LC/MS). To demonstrate proof-of-concept, known sulfur microbial compounds were successfully identified from a mixture of non-sulfur microbial compounds as sulfinyl or sulfonyl products of Mo-catalyzed oxidation. Then our MoS-screening method was used to screen 300 samples of microbial broth for sulfur compounds. One of the identified compounds was a kitasetaline-containing N-acetyl cysteine moiety produced by an actinomycete strain. These results demonstrate the potential of MoS-screening in the search for new sulfur compounds from microbial sources.

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21

Pelzer, G., J. Herwig, W. Keim, and R. Goddard. "Catalytic transformations of sulfur dioxide into organic sulfur compounds." Russian Chemical Bulletin 47, no. 5 (May 1998): 904–12. http://dx.doi.org/10.1007/bf02498159.

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22

Marcinkowska, Monika A., and Henryk H. Jeleń. "Role of Sulfur Compounds in Vegetable and Mushroom Aroma." Molecules 27, no. 18 (September 19, 2022): 6116. http://dx.doi.org/10.3390/molecules27186116.

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At the base of the food pyramid is vegetables, which should be consumed most often of all food products, especially in raw and unprocessed form. Vegetables and mushrooms are rich sources of bioactive compounds that can fulfill various functions in plants, starting from protection against herbivores and being natural insecticides to pro-health functions in human nutrition. Many of these compounds contain sulfur in their structure. From the point of view of food producers, it is extremely important to know that some of them have flavor properties. Volatile sulfur compounds are often potent odorants, and in many vegetables, belonging mainly to Brassicaeae and Allium (Amaryllidaceae), sulfur compounds determine their specific flavor. Interestingly, some of the pathways that form volatile sulfur compounds in vegetables are also found in selected edible mushrooms. The most important odor-active organosulfur compounds can be divided into isothiocyanates, nitriles, epithionitriles, thiols, sulfides, and polysulfides, as well as others, such as sulfur containing carbonyl compounds and esters, R-L-cysteine sulfoxides, and finally heterocyclic sulfur compounds found in shiitake mushrooms or truffles. This review paper summarizes their precursors and biosynthesis, as well as their sensory properties and changes in selected technological processes.

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23

Rezanka, Tomas, Miroslav Sobotka, Jaroslav Spizek, and Karel Sigler. "Pharmacologically Active Sulfur-Containing Compounds." Anti-Infective Agents in Medicinal Chemistry 5, no. 2 (April 1, 2006): 187–224. http://dx.doi.org/10.2174/187152106776359002.

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24

HIRAI, Koichi. "Medicines and organic sulfur compounds." Journal of Synthetic Organic Chemistry, Japan 45, no. 6 (1987): 536–48. http://dx.doi.org/10.5059/yukigoseikyokaishi.45.536.

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25

NAKAI, Satoshi, and Masaaki HOSOMI. "Dioxin-like Heterocyclic Sulfur Compounds." Journal of Environmental Chemistry 15, no. 2 (2005): 239–46. http://dx.doi.org/10.5985/jec.15.239.

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26

El-khateeb*, Mohammad, Birgit Wolfsberger, and Wolfdieter A. Schenk*. "Sulfur(IV) compounds as ligands." Journal of Organometallic Chemistry 612, no. 1-2 (October 2000): 14–17. http://dx.doi.org/10.1016/s0022-328x(00)00346-6.

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27

Brunet, E., M. C. Carreño, M. T. Gallego, J. L. García Ruano, and F. Alcudia. "Stereochemistry of organic sulfur compounds." Tetrahedron 41, no. 9 (January 1985): 1733–52. http://dx.doi.org/10.1016/s0040-4020(01)96487-7.

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28

Resende, Stella M., and Fernando R. Ornellas. "Thermochemistry of atmospheric sulfur compounds." Chemical Physics Letters 367, no. 3-4 (January 2003): 489–94. http://dx.doi.org/10.1016/s0009-2614(02)01738-4.

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29

de Zwart, Jolyn M. M., and J. Gijs Kuenen. "C1-cycle of sulfur compounds." Biodegradation 3, no. 1 (March 1992): 37–59. http://dx.doi.org/10.1007/bf00189634.

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30

Freitas, Vera L. S., and Maria D. M. C. Ribeiro da Silva. "Oxygen and sulfur heterocyclic compounds." Journal of Thermal Analysis and Calorimetry 121, no. 3 (June 30, 2015): 1059–71. http://dx.doi.org/10.1007/s10973-015-4800-0.

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31

Kalugin, V. E., and V. P. Litvinov. "Functionally substituted sulfur-containing compounds." Russian Chemical Bulletin 49, no. 5 (May 2000): 879–85. http://dx.doi.org/10.1007/bf02494713.

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32

Purdy, Ralph F., Joe E. Lepo, and Bailey Ward. "Biodesulfurization of organic-sulfur compounds." Current Microbiology 27, no. 4 (October 1993): 219–22. http://dx.doi.org/10.1007/bf01692879.

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33

BOLSHAKOV, G. F. "ORGANIC SULFUR COMPOUNDS OF PETROLEUM." Sulfur reports 5, no. 2 (August 1986): 103–393. http://dx.doi.org/10.1080/01961772.1986.10462153.

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Bolshakov, G. F. "Organic Sulfur Compounds of Petroleum." Sulfur reports 5, no. 2 (January 1986): 103–382. http://dx.doi.org/10.1080/01961772.1986.10878150.

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35

Bajus, Martin. "Sulfur Compounds in Hydrocarbon Pyrolysis." Sulfur reports 9, no. 1 (May 1989): 25–66. http://dx.doi.org/10.1080/01961778908047982.

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36

Brunet, E., J. L. García Ruano, M. A. Hoyos, J. H. Rodríguez, and F. Alcudia. "Stereochemistry of organic sulfur compounds." Journal of Molecular Structure 158 (May 1987): 79–88. http://dx.doi.org/10.1016/0022-2860(87)80006-6.

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37

Vlasova, N. N., M. S. Sorokin, and E. N. Oborina. "Carbofunctional sulfur-containing organosilicon compounds." Applied Organometallic Chemistry 31, no. 8 (December 27, 2016): e3668. http://dx.doi.org/10.1002/aoc.3668.

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Miękus, Natalia, Krystian Marszałek, Magdalena Podlacha, Aamir Iqbal, Czesław Puchalski, and Artur H. Świergiel. "Health Benefits of Plant-Derived Sulfur Compounds, Glucosinolates, and Organosulfur Compounds." Molecules 25, no. 17 (August 21, 2020): 3804. http://dx.doi.org/10.3390/molecules25173804.

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The broad spectrum of the mechanism of action of immune-boosting natural compounds as well as the complex nature of the food matrices make researching the health benefits of various food products a complicated task. Moreover, many routes are involved in the action of most natural compounds that lead to the inhibition of chronic inflammation, which results in a decrease in the ability to remove a pathogen asymptomatically and is connected to various pathological events, such as cancer. A number of cancers have been associated with inflammatory processes. The current review strives to answer the question of whether plant-derived sulfur compounds could be beneficial in cancer prevention and therapy. This review focuses on the two main sources of natural sulfur compounds: alliaceous and cruciferous vegetables. Through the presentation of scientific data which deal with the study of the chosen compounds in cancer (cell lines, animal models, and human studies), the discussion of food processing’s influence on immune-boosting food content is presented. Additionally, it is demonstrated that there is still a need to precisely demonstrate the bioavailability of sulfur-containing compounds from various types of functional food, since the inappropriate preparation of vegetables can significantly reduce the content of beneficial sulfur compounds. Additionally, there is an urgent need to carry out more epidemiological studies to reveal the benefits of several natural compounds in cancer prevention and therapy.

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Grossman, M. J., M. K. Lee, R. C. Prince, K. K. Garrett, G. N. George, and I. J. Pickering. "Microbial Desulfurization of a Crude Oil Middle-Distillate Fraction: Analysis of the Extent of Sulfur Removal and the Effect of Removal on Remaining Sulfur." Applied and Environmental Microbiology 65, no. 1 (January 1, 1999): 181–88. http://dx.doi.org/10.1128/aem.65.1.181-188.1999.

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ABSTRACT Rhodococcus sp. strain ECRD-1 was evaluated for its ability to desulfurize a 232 to 343°C middle-distillate (diesel range) fraction of Oregon basin (OB) crude oil. OB oil was provided as the sole source of sulfur in batch cultures, and the extent of desulfurization and the chemical fate of the residual sulfur in the oil after treatment were determined. Gas chromatography (GC), flame ionization detection, and GC sulfur chemiluminesce detection analysis were used to qualitatively evaluate the effect ofRhodococcus sp. strain ECRD-1 treatment on the hydrocarbon and sulfur content of the oil, respectively. Total sulfur was determined by combustion of samples and measurement of released sulfur dioxide by infrared absorption. Up to 30% of the total sulfur in the middle distillate cut was removed, and compounds across the entire boiling range of the oil were affected. Sulfur K-edge X-ray absorption-edge spectroscopy was used to examine the chemical state of the sulfur remaining in the treated OB oil. Approximately equal amounts of thiophenic and sulfidic sulfur compounds were removed by ECRD-1 treatment, and over 50% of the sulfur remaining after treatment was in an oxidized form. The presence of partially oxidized sulfur compounds indicates that these compounds were en route to desulfurization. Overall, more than two-thirds of the sulfur had been removed or oxidized by the microbial treatment.

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Li, Tonglin. "Application of sulfur-based composite materials in the positive electrode of lithium-sulfur batteries." E3S Web of Conferences 553 (2024): 01013. http://dx.doi.org/10.1051/e3sconf/202455301013.

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Traditional lithium-ion batteries are no longer able to keep up with the growing need for energy storage efficiency in areas like electric cars and renewable energy storage. Because of their great energy density, affordability, and environmental friendliness, lithium-sulfur batteries are regarded as a very promising solution for secondary battery systems. Sulfur-based compounds are an essential part of lithium-sulfur batteries and have a direct impact on the battery’s energy density and performance. However, sulfur-based compounds are easily soluble in electrolytes and have low conductivity, which shortens battery cycle life and energy efficiency. Sulfur dissolution can be successfully inhibited and capacitance may be enhanced by optimizing the structure and characteristics of sulfur-based materials, which will improve the overall performance of lithium-sulfur batteries. To enhance the performance of lithium-sulfur batteries, this article suggests three modification techniques for sulfur-based materials. These techniques mostly include compounding sulfur with carbon compounds, metal oxides, and polymers. This article also outlines the shortcomings of the present lithium-sulfur battery research and looks forward to the future development direction.

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Hsieh, Yuch-Ping, and Glynnis C Bugna. "Determination of Organic and Reduced Inorganic Sulfur by Multi-element Scanning Thermal Analysis." Journal of Biomedical Research & Environmental Sciences 4, no. 7 (July 2023): 1156–65. http://dx.doi.org/10.37871/jbres1781.

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Determination of organic sulfur in solid environmental samples has been difficult because there is no appropriate separation technology. Routine organic sulfur analysis has mostly been done indirectly by the difference between the total and the inorganic sulfur contents. This indirect analysis is tedious, accumulating multiple sampling and procedural errors, and has no chemical characterization information. There are modern technologies such as S-XANES for direct sulfur analysis on solid samples. But they are sophisticated, expensive, and unavailable for routine sulfur analysis. Due to those analytical difficulties, our understanding of sulfur chemistry in solid samples has been limited. This study was initiated to apply a convenient Multi-Element Scanning Thermal Analysis (MESTA) method for direct analysis of organic and reduced inorganic sulfur in solid samples. If successful, sulfur MESTA will be a convenient and powerful tool for studying environmental sulfur cycles and sulfur-containing materials. We used 27 reference organic and reduced inorganic sulfur compounds to validate the MESTA method. The results indicate that MESTA can directly quantify and characterize organic and reduced inorganic sulfur compounds. Recoveries of the reference compounds were in the range of 77.0% to 97.7% except for sulfate functional group containing compounds of bathophenanthrolinedisulfonic acid (57.4 ± 6.7%), sodium thiosulfate (60.6 ± 3.1%) and sodium dodecyl sulfate (38.0 ± 2.6%). MESTA is rapid, sensitive, and inexpensive. It is a convenient and powerful tool for sulfur analysis in a wide range of solid, liquid, or mixed samples.

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Jiang, Nan, Fuyong Zhang, and Hua Song. "Effect of reduction temperature on the structure and hydrodesulfurization performance of Na doped Ni2P/MCM-41 catalysts." RSC Advances 9, no. 27 (2019): 15488–94. http://dx.doi.org/10.1039/c9ra01582e.

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Müller, Nikolaus, Doris Rauhut, and Andrii Tarasov. "Sulfane Sulfur Compounds as Source of Reappearance of Reductive Off-Odors in Wine." Fermentation 8, no. 2 (January 26, 2022): 53. http://dx.doi.org/10.3390/fermentation8020053.

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Reactive compounds with one or more sulfane sulfur atoms can be an important source of reductive off-odors in wine. These substances contain labile sulfur, which can participate in microbiological (enzymatic) and chemical transformations (including in the post-bottling period), releasing malodorous hydrogen sulfide (H2S) and its derivatives (MeSH, EtSH, etc.). The following sulfane sulfur compounds were considered in this review as important precursors in the wine chemistry of reductive aromas: elemental sulfur (S8), persulfides (R-S-S-H), polysulfanes (R-Sn-R(′)), polythionates (−O3S-Sn-SO3−), thiosulfate (S2O32−) and derivatives of (poly)sulfane monosulfonic acids (R-Sn-SO3H). This review discusses the formation of these compounds, their reactivity and chemical transformations in wine, including reactions of nucleophilic substitution. In particular, the reactions of thiolysis, thiosulfatolysis and sulfitolysis of sulfane sulfur compounds are described, which lead in the end to reductive aroma compounds. In this way, the review attempts to shed light on some of the mysteries in the field of sulfur chemistry in wine and the reappearance of reductive off-odors after bottling.

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Suzuki, Isamu. "Oxidation of inorganic sulfur compounds: Chemical and enzymatic reactions." Canadian Journal of Microbiology 45, no. 2 (February 1, 1999): 97–105. http://dx.doi.org/10.1139/w98-223.

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Microbial oxidation of inorganic sulfur compounds is governed by both chemical and enzymatic reactions. It is therefore essential to understand reactions possible in chemistry when we consider enzymatic reactions. Various oxidation states of sulfur atoms in inorganic sulfur compounds and chemical oxidation reactions as well as nucleophilic cleavage of sulfur-sulfur bonds are discussed. The scheme of enzymatic oxidation of sulfur compounds with S2-→> S0→> SO32-→> SO42-as the main oxidation pathway is discussed with thiosulfate and polythionates leading into the main pathway for complete oxidation to sulfate. Enzymatic reactions are related to chemical reactions and the use of inhibitors for S0→> SO32-and SO32-→> SO42-is discussed for analyzing and establishing reaction stoichiometries. The proposed pathway is supported by a variety of evidence in many different microorganisms including some genetic evidence if the oxidation steps include all the systems irrespective of oxidizing agents (O2, Fe3+, cytochromes etc.).Key words: sulfur, oxidation, chemical, enzymatic, reactions.

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Peng, Fan, and Xiao Hong Yang. "Effect of Cu²⁺ on Ascorbic Acid - Methionine Pattern is Formed by the Reaction of Aroma Compounds." Advanced Materials Research 803 (September 2013): 103–7. http://dx.doi.org/10.4028/www.scientific.net/amr.803.103.

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Using solid phase microextraction - Gas Chromatography - mass spectrometry (SPME-GC-MS) technique to acid and methionine bad blood (ASA-Met) analysis of the reaction products, the influence of Cu2+ on the model reaction flavor compounds form effect. 27 flavour compounds thiophene, furan, pyrazine, sulfur and other compounds, were identified, including sulfur compounds, such as aliphatic cyclic sulfides, sulfide, thiophene, pyrazine as main components. Cu2+ was added to the reaction mode, on the one hand, sulfur-containing compounds yield increased significantly; on the other hand, increasing the thiophene, pyrazine compound types, yield increase.

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Rose, Peter, Philip Keith Moore, Matthew Whiteman, and Yi-Zhun Zhu. "An Appraisal of Developments in Allium Sulfur Chemistry: Expanding the Pharmacopeia of Garlic." Molecules 24, no. 21 (November 5, 2019): 4006. http://dx.doi.org/10.3390/molecules24214006.

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Alliums and allied plant species are rich sources of sulfur compounds that have effects on vascular homeostasis and the control of metabolic systems linked to nutrient metabolism in mammals. In view of the multiple biological effects ascribed to these sulfur molecules, researchers are now using these compounds as inspiration for the synthesis and development of novel sulfur-based therapeutics. This research has led to the chemical synthesis and biological assessment of a diverse array of sulfur compounds representative of derivatives of S-alkenyl-l-cysteine sulfoxides, thiosulfinates, ajoene molecules, sulfides, and S-allylcysteine. Many of these synthetic derivatives have potent antimicrobial and anticancer properties when tested in preclinical models of disease. Therefore, the current review provides an overview of advances in the development and biological assessment of synthetic analogs of allium-derived sulfur compounds.

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Felitsyn, S. B., and V. Yu Kirianov. "Sulfur in Tephra of Opala Volcano Eruption ca. 1500 years ago, Kamchatka." Vulkanologiâ i sejsmologiâ, no. 3 (November 25, 2024): 18–26. http://dx.doi.org/10.31857/s0203030624030029.

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Sulfur-bearing compounds of Plinian-type volcanic eruptions can be transferred with ash particles of distal tephra over considerable distances. Average sulfur content in tephra of Opala volcano (Kamchatka, eruption ca. 1500 years ago) comprises 310 ppm with maximum concentration up to 800 ppm. Connection detected between sulfur content in bulk samples and the particle size distribution – sulfur is predominantly contained in the fraction 0.25‒0.50 mm represented by elongated ash particles with elongated gas pores 1.0‒10.0 mkm in diameter. The most likely reason for the dependence of sulfur content on the texture of ash particles is preservation of sulfur compounds of the water-soluble complex inside gas pores. Sulfur-containing compounds deposited on the surface of ash particles were removed by precipitation in the process of existing tephra in continental environment. Ingress of ash particles into bottom sediments containing sulfur compounds on the inner surface of gas pores during plinian type eruptions similar to the eruption of Opala volcano ca. 1500 years ago, may influence the geochemistry of lithogenesis and lead to redistribution of elements sensitive to the presence of acid-forming agents in the sediment at the stage of diagenesis.

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Yao, Qiu Xiang, Mei Li Du, Shui Li Wang, Jing Liu, Jian Li Yang, and Hai Tao Shang. "Distribution of Sulfur Forms in Low Temperature Pyrolysis of Coal." Advanced Materials Research 512-515 (May 2012): 834–37. http://dx.doi.org/10.4028/www.scientific.net/amr.512-515.834.

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The distribution of sulfur forms in the products of low temperature pyrolysis of Carboniferous high sulfur coal from Northwest China was investigated. The typical method of Gray-King assay was used to carry out the low temperature pyrolysis experiments. GC-MS analysis was used to investigate the composition of sulfur compounds in the coal tar. The results show that sulfur mainly remained in the semi-coke and accounted for 80.97% of the total sulfur. Pyrites decomposed and transformed into sulfates and organic sulfur. 5 sulfur containing compounds were detected in the coal tar and they are dibenzothiophene, benzonaphthothiophene and their substituted homologs.

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Kariuki, Stephen, Philippe Babady-Bila, and Breanna Duquette. "N,N-Diethyl-p-phenylenediamine effectiveness in analysis of polysulfides and polythionates in water." Environmental Chemistry 5, no. 3 (2008): 226. http://dx.doi.org/10.1071/en08020.

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Environmental context. The importance of hydrogen sulfide as well as some of the reduced sulfur species such as polysulfides as environmental pollutants is a result of their toxicity, unpleasant odour, and their reactivity with metals and metallic ions found in various environmental samples. Although known to be popular, the effectiveness of N,N-diethyl-p-phenylenediamine and other related compounds in the spectrophotometric analysis of such sulfur compounds in water as well as in other environmental samples has not been fully investigated. Our results show that although the quantification of simple sulfides in the environmental samples may be easily accomplished spectrophotometrically by using N,N-diethyl-p-phenylenediamine, the level of difficulty in analysing such compounds may increase with their increasing sulfur chain. Abstract. The analysis of polysulfides, polythionates and other sulfur species likely to be found in poorly aerated environmental samples such as water is presented. In-depth spectrophotometric testing carried out using N,N-diethyl-p-phenylenediamine shows that the well known acidification-and-purge method is not sufficiently suitable for the analysis of polysulfides and other low oxidation-state sulfur compounds that contain a sulfur chain longer than two. Further, this study finds that the use of chromium(II) which acts as a reducing agent to the sulfur-containing compounds improves the spectrophotometric analysis of the polysulfides and polythionates in water, but only slightly. The extent of reduction of polysulfides and polythionates to sulfide by chromium appears dependent upon the oxidation state of sulfur as well as the chain length in the polysulfidic compounds.

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Pahlavan, Farideh, and Elham H. Fini. "Phenolic Compounds to Hinder Sulfur Crystallization in Sulfur-Extended Bitumen." Resources, Conservation and Recycling 180 (May 2022): 106184. http://dx.doi.org/10.1016/j.resconrec.2022.106184.

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