Journal articles: 'Sulphur compounds'

1

Steudel, Ralf, and Vera Münchow. "Sulphur compounds." Journal of Chromatography A 623, no. 1 (October 1992): 174–77. http://dx.doi.org/10.1016/0021-9673(92)85314-j.

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2

Steudel, Ralf, and Angela Albertsen. "Sulphur compounds." Journal of Chromatography A 606, no. 2 (August 1992): 260–63. http://dx.doi.org/10.1016/0021-9673(92)87034-6.

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3

Albertsen, Jörg, and Ralf Steudel. "Sulphur compounds." Journal of Organometallic Chemistry 424, no. 2 (February 1992): 153–58. http://dx.doi.org/10.1016/0022-328x(92)83145-8.

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4

Steiger, Thomas, and Ralf Steudel. "Sulphur compounds." Journal of Molecular Structure: THEOCHEM 257, no. 3-4 (May 1992): 313–23. http://dx.doi.org/10.1016/0166-1280(92)85048-p.

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5

Janssen, A. J. H., R. Ruitenberg, and C. J. N. Buisman. "Industrial applications of new sulphur biotechnology." Water Science and Technology 44, no. 8 (October 1, 2001): 85–90. http://dx.doi.org/10.2166/wst.2001.0471.

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The emission of sulphur compounds into the environment is undesirable because of their acidifying characteristics. The processing of sulphidic ores, oil refining and sulphuric acid production are major sources of SO2 emissions. Hydrogen sulphide is emitted into the environment as dissolved sulphide in wastewater or as H2S in natural gas, biogas, syngas or refinery gases. Waste streams containing sulphate are generated by many industries, including mining, metallurgical, pulp and paper and petrochemical industries. Applying process technologies that rely on the biological sulphur cycle can prevent environmental pollution. In nature sulphur compounds may cycle through a series of oxidation states (-2, 0, +2, +4, +6). Bacteria of a wide range of genera gain metabolic energy from either oxidising or reducing sulphur compounds. Paques B.V. develops and constructs reactor systems to remove sulphur compounds from aqueous and gaseous streams by utilising naturally occurring bacteria from the sulphur cycle. Due to the presence of sulphide, heavy metal removal is also achieved with very high removal efficiencies. Ten years of extensive laboratory and pilot plant research has, to date, resulted in the construction of over 30 full-scale installations. This paper presents key processes from the sulphur cycle and discusses recent developments about their application in industry.

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6

Lazorko, Olexander, Michael Bratychak, and Sergiy Pysh’ev. "Investigation of straight-run diesel oil fractions with sulfur high content oxidative desulphurization." Chemistry & Chemical Technology 2, no. 4 (December 15, 2008): 309–16. http://dx.doi.org/10.23939/chcht02.04.309.

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The article deals with desulphurization of straight-run diesel fractions by selective oxidation of sulphuric compounds with their further separation. The possibility of commercial diesel fuels production with sulphur content up to 0.2 mas % from straight-run fractions with sulphur content of 0.25–0.67 mas % has been shown.

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7

Pruski, Audrey Margareth, Nathalie Rousse, Aline Fiala-Médioni, and Jacques Boulègue. "Sulphur signature in the hydrothermal vent mussel Bathymodiolus azoricus from the Mid-Atlantic Ridge." Journal of the Marine Biological Association of the United Kingdom 82, no. 3 (June 2002): 463–68. http://dx.doi.org/10.1017/s0025315402005726.

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The sulphur compound composition of the hydrothermal vent mussel Bathymodiolus azoricus (Bivalvia: Mytilidae) was analysed in order to determine the specific biochemical characteristics of a thiotrophic mode of nutrition. In specimens collected from two contrasting vent fields on the Mid-Atlantic Ridge (Menez Gwen and Lucky Strike), substantial differences in the sulphur composition were observed between tissues and sampling sites. Total sulphur content was higher for samples from Lucky Strike than for those from Menez Gwen. The amount of elemental sulphur in the gill of B. azoricus was in the same range as values previously reported for the vesicomyid clam Calyptogena phaseoliformis and the lucinid clam Lucinoma annulata. Rings of orthorhombic sulphur or compounds such as polythionates or organopolysulphides excreted in the cytoplasm by the symbionts may account for the large amounts of elemental sulphur evidenced for the first time in an hydrothermal vent mussel. A large proportion of the tissue-sulphur was incorporated into free amino compounds such as taurine, hypotaurine, thiotaurine and cysteine, and in a lesser extent to the tripeptide glutathione. In mantles, sulphur seems to be contained mainly in organic compounds such as proteins, mucopolysaccharides and lipids. However, the occurrence of specific compounds such as thiotaurine and elemental sulphur in gills indicate that in this tissue a large proportion of the sulphur might be involved in specific pathways related to transport, storage and detoxification of sulphide. Moreover, our results suggest a greater reliance on thiotrophy of mussels from Lucky Strike as compared to specimens from Menez Gwen.

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8

Jug, Karl, and Rüdiger Iffert. "SINDO1 study of sulphur isomers and sulphur fluorine compounds." Journal of Molecular Structure: THEOCHEM 186 (April 1989): 347–59. http://dx.doi.org/10.1016/0166-1280(89)87055-1.

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9

Delaney, Paul A., Robert A. W. Johnstone, Paul A. Leonard, and Peter Regan. "Novel fused bicyclic sulphur compounds." Journal of the Chemical Society, Perkin Transactions 1, no. 2 (1991): 285. http://dx.doi.org/10.1039/p19910000285.

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10

Carretero, J. C., J. L. Garcia Ruano, M. C. Martinez, J. H. Rodriguez, and F. Alcudia. "Stereochemistry of organic sulphur compounds." Tetrahedron 41, no. 12 (January 1985): 2419–33. http://dx.doi.org/10.1016/s0040-4020(01)96637-2.

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11

HORN, R., and D. URCH. "ELECTRONIC STRUCTURE OF SULPHUR COMPOUNDS." Le Journal de Physique Colloques 48, no. C9 (December 1987): C9–1009—C9–1012. http://dx.doi.org/10.1051/jphyscol:19879180.

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12

Schenk, Wolfdieter A., Almuetassem Khadra, and Christian Burschka. "Sulphur(IV) compounds as ligands." Journal of Organometallic Chemistry 468, no. 1-2 (April 1994): 75–86. http://dx.doi.org/10.1016/0022-328x(94)80033-2.

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13

Pyshyev, Serhiy, Michael Bratychak, Vasyl Hayvanovych, Pavlo Paniv, and Witold Wacławek. "Water Effect on Oxidative Desulphurization Process of Straight-Run Kerosene Fraction / Wpływ Wody Na Utleniający Proces Odsiarczania Frakcji Nafty." Ecological Chemistry and Engineering S 20, no. 1 (March 1, 2013): 55–68. http://dx.doi.org/10.2478/eces-2013-0004.

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Abstract Sulphur dioxide obtained during fuels burning in combustion engines is one of the main pollutants. In diesel oils and gasolines the sulphur content must be 5-10 ppm and in jet fuels - 300-3000 ppm. However the production of hydrofined jet fuel is problematic. The reason is deterioration of fuel stability and antioxygenic properties. The oxidative desulphurization of straight-run kerosene was investigated. This method combines oxidation by atmospheric oxygen of sulphur compounds under increased temperature and pressure in the presence of water in the reaction medium, and removal of oxidized sulphur compounds from the oxidation-treated fuel via rectification. It was showed that water partially extracts from the hydrocarbon medium acidic compounds, formed in the beginning stage of oxidation, dissociation of which leads to the formation in water acidic medium. As a result, a pathway of the hydroperoxides decomposition partially changes from the formation of carbonic acids and oxyacids to the formation of alcohols, phenols and alkylphenols, which displayed an inhibitory effect in hydrocarbon oxidation. It was assumed that an inhibitory effect of water, in addition to the creation reverse micelles with peroxides and complexes with free radicals, caused by oxidation products created in the beginning stage of oxidation. The effect of water/kerosene ratio on the oxidative desulphurization of straight-run kerosene fraction has been examined. It was found that water improves process selectivity with insignificant influence on the degree of sulphur recovery. The optimum value of water/kerosene ratio for the fuel containing 0.15% mass of sulphuric compounds has been determined.

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14

Cozzi, Federico, Italo Pellegrini, Gianpiero Adami, Edoardo Reisenhofer, Massimo Bovenzi, and Pierluigi Barbieri. "Sulphur speciation of PM10 samples by XANES spectroscopy." Open Chemistry 7, no. 3 (September 1, 2009): 395–401. http://dx.doi.org/10.2478/s11532-009-0052-9.

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AbstractSulphur K-edge X-ray absorption near edge structure (XANES) spectroscopy was used to identify sulphur compounds in PM10 samples collected simultaneously at two sites with different environmental situations in the province of Trieste (NE of Italy), during summer and winter seasons respectively. The first site is an industrial site located near a steel mill plant and the second is a coastal site. The sulphur speciation at the industrial site has shown the presence of the following sulphur compounds in both seasons: organic compounds (thiophenes or Polycyclic Aromatic Sulphur Heterocycles — PAHs) and sulphates while in the winter season sulphites were also present. In the coastal site organic compounds (thiophenes or PASHs) and sulphate were found during winter season, moreover bisulphates were found during summer season. Relative percentages of the different sulphur compounds have shown that sulphate is the most abundant form of sulphur in the industrial site samples during both seasons and in the coastal site sample collected during the winter season (> 98%); in the coastal site sample collected during the summer season the relative percentages of bisulphate and sulphate were around 40% and 60% respectively.

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15

Hammen, V. C. "Long-time risk of groundwater/drinking water pollution with sulphuric compounds beneath burned peatlands in Indonesia." Water Science and Technology 56, no. 1 (July 1, 2007): 253–58. http://dx.doi.org/10.2166/wst.2007.459.

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Smoke-haze episodes caused by vegetation and peat fires affect parts of Indonesia every year with significant impacts on human health and climate. The forest fires 1997/1998 were by far the largest in Indonesian history, burning between 5 and 8 million hectares before they were stopped by the monsoon rains in December 1997. Fires sprang up again in 1998 on Kalimantan when monsoon rain paused. Peat forests and peatlands are in particular severely affected. In the 1997/1998 haze event, 2.1–2.5 million hectare of peat swamp forest burnt in Indonesia. The remaining ash contains high concentrations of sulphur and sulphuric compounds which eventually leach into the groundwater, thus polluting groundwater and drinking water. The thicker the peat layer is and the higher the number of fires in the respective area the more sulphuric compounds will leach into the groundwater. Risk areas for the sulphur loads of the ash are identified.

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16

Chela-Flores, J. "The sulphur dilemma: are there biosignatures on Europa's icy and patchy surface?" International Journal of Astrobiology 5, no. 1 (January 2006): 17–22. http://dx.doi.org/10.1017/s1473550406002862.

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We discuss whether sulphur traces on Jupiter's moon Europa could be of biogenic origin. The compounds detected by the Galileo mission have been conjectured to be endogenic, most likely of cryovolcanic origin, due to their non-uniform distribution in patches. The Galileo space probe first detected the sulphur compounds, as well as revealing that this moon almost certainly has a volcanically heated and potentially habitable ocean hiding beneath a surface layer of ice. In planning future exploration of Europa there are options for sorting out the source of the surficial sulphur. For instance, one possibility is searching for the sulphur source in the context of the study of the Europa Microprobe In Situ Explorer (EMPIE), which has been framed within the Jovian Minisat Explorer Technology Reference Study (ESA). It is conceivable that sulphur may have come from the nearby moon Io, where sulphur and other volcanic elements are abundant. Secondly, volcanic eruptions in Europa's seafloor may have brought sulphur to the surface. Can waste products rising from bacterial colonies beneath the icy surface be a third alternative significant factor in the sulphur patches on the Europan surface? Provided that microorganisms on Europa have the same biochemical pathways as those on Earth, over geologic time it is possible that autochthonous microbes can add substantially to the sulphur deposits on the surface of Europa. We discuss possible interpretations of the non-water-ice elements (especially the sulphur compound mercaptan) in the context of the studies for future missions. To achieve reliable biosignatures it seems essential to go back to Europa. Our work highlights the type of biogenic signatures that can be searched for when probing Europa's icy and patchy surface.

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17

Krishna Swamy, K. S., and M. K. Wallis. "Sulphur compounds in cometary IUE spectra." Monthly Notices of the Royal Astronomical Society 228, no. 2 (September 1, 1987): 305–12. http://dx.doi.org/10.1093/mnras/228.2.305.

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18

Gompper, Rudolf. "Novel Reactions of Ambident Sulphur Compounds." Phosphorus and Sulfur and the Related Elements 23, no. 1-3 (June 1985): 223–51. http://dx.doi.org/10.1080/03086648508073388.

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19

Al-Attabi, Z., B. R. D'Arcy, and H. C. Deeth. "Volatile Sulphur Compounds in UHT Milk." Critical Reviews in Food Science and Nutrition 49, no. 1 (October 27, 2008): 28–47. http://dx.doi.org/10.1080/10408390701764187.

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20

Raab, Andrea, and Jörg Feldmann. "Biological sulphur-containing compounds – Analytical challenges." Analytica Chimica Acta 1079 (November 2019): 20–29. http://dx.doi.org/10.1016/j.aca.2019.05.064.

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21

Babaian-Kibala, Elizabeth, F. Albert Cotton, and Piotr A. Kibala. "Square, sulphur-bicapped tetraniobium cluster compounds." Polyhedron 9, no. 14 (1990): 1689–94. http://dx.doi.org/10.1016/s0277-5387(00)83973-x.

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22

A. Abdule, Dalia. "Synthesis of sulphur-containing hetrocyclic compounds." Kirkuk University Journal-Scientific Studies 3, no. 2 (December 28, 2008): 88–95. http://dx.doi.org/10.32894/kujss.2008.42155.

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23

Jug, Karl, and R�diger Iffert. "Application of SINDO1 to sulphur compounds." Journal of Computational Chemistry 8, no. 7 (October 1987): 1004–15. http://dx.doi.org/10.1002/jcc.540080709.

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24

Mugford, S. C., M. J. Edgell, and J. E. Castle. "The surface chemistry of sulphur compounds." Surface and Interface Analysis 10, no. 4 (April 1987): 219–21. http://dx.doi.org/10.1002/sia.740100408.

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25

J.N.M. "The structure of Volatile Sulphur Compounds." Journal of Molecular Structure 144, no. 3-4 (May 1986): 390–91. http://dx.doi.org/10.1016/0022-2860(86)85020-7.

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26

Ejaz, Haroon, Eshrat Bibi, Waqas Ali, Ikhlaq Ahmad, Aamna Lashari, Hadia Faiz, and Wajeeha Nazar. "Sulphur and particulate matter affecting on soil and underground plants." Journal of Agriculture and Applied Biology 3, no. 1 (April 13, 2022): 40–49. http://dx.doi.org/10.11594/jaab.03.01.05.

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Environmental problems were faced, and one of them is the accumulation of Sulphur and its compounds in the atmosphere and through the atmosphere, it accumulates in the soil and then the underground plants. In the atmosphere Sulphur it is present in the form of aerosols and acid precipitation. Volatile Sulphur compounds are released by the combustion of fossil fuels and volcanic eruption also produces Sulphur oxides. Deficiency of Sulphur produces paling of plants and denaturing of some enzymes that are then fulfilled by using the fertilizers of Sulphur. Soil also has an adverse effect when particulate matter or Sulphur aggregates in the plants and their physiological and biological development is retarded. Most of the industrial processes contain Sulphur compounds like thiol, thiophene, oxides of Sulphur etc. Structural and chemical mutation occurs when particulate substances induce into the plants and productivity and efficiency of that plant is reduced. The impact of acid rain in places with high quantities of mixed air pollutants has yet to be determined. Acid inputs appear to be affecting several techniques in field soils. These must be measured in terms of plant output. SO2 enters the leaves via stomata and quickly dissolves in Apoplastic water, producing mostly Sulphite (SO3)-2, bisulphite (HSO-3), and H+ ions. SO2 phytotoxicity has been attributed to Sulphite and bisulphite ion interactions with different chemicals. If the quantities are not too high, most leaves can detoxify Sulphite and bisulphite by oxidizing them to less harmful Sulphate ions via a series of processes. SO2 absorbed by foliage may undergo reduction conversion, including absorption into organic Sulphur compounds and release from the leaves as H2S. The oxidizing or reducing route of SO2 in plants is determined by plant species, soil Sulphur content, SO2 amount and persistence, and plant growth conditions.

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27

Hemmingsen, Tor. "The electrochemical reaction of sulphur—oxygen compounds—part I. A review of literature on the electrochemical properties of sulphur/sulphur—oxygen compounds." Electrochimica Acta 37, no. 15 (December 1992): 2775–84. http://dx.doi.org/10.1016/0013-4686(92)85206-z.

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28

Fukuoka, Hironori, Tomohiro Andou, Takeo Moriya, Koji Narita, Ken Kasahara, Daisuke Miura, Yuji Sekiguchi, et al. "Sulphur metabolism in colon cancer tissues: a case report and literature review." Journal of International Medical Research 49, no. 11 (November 2021): 030006052110599. http://dx.doi.org/10.1177/03000605211059936.

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Sulphur-containing compounds have been linked to colorectal cancer by factors such as the presence of methyl mercaptan in intestinal gas and long-term dietary intake associated with sulphur-metabolizing microbiota. Therefore, this current case report hypothesized that active sulphur metabolism in colorectal cancer results in the formation of sulphur compounds in the intestine and, thus, examined sulphur metabolites possibly associated with sulphur respiration in colon cancer tissues. The patient was a 73-year-old female that underwent laparoscopic right hemicolectomy for ascending colon cancer. During the surgery, colon cancer tissues and normal intestinal mucosa samples were collected. After optimizing the sample concentrations for homogenization (pre-treatment), the samples were stabilized using a hydroxyphenyl-containing derivative and the relevant metabolites were quantified using liquid chromatography with tandem mass spectrometry. The results showed that cysteine persulfide and cysteine trisulfide levels were higher in colon cancer tissues than in normal mucosal tissues. Thus, sulphur metabolism, possibly sulphur respiration, is enhanced in colon cancer tissues.

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29

Ramírez, Martín, Maikel Fernández, Claudia Granada, Sylvie Le Borgne, José Manuel Gómez, and Domingo Cantero. "Biofiltration of reduced sulphur compounds and community analysis of sulphur-oxidizing bacteria." Bioresource Technology 102, no. 5 (March 2011): 4047–53. http://dx.doi.org/10.1016/j.biortech.2010.12.018.

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30

Fišera, Miroslav, Květoslava Šustová, Pavel Tvrzník, Helena Velichová, Lenka Fišerová, Eva Lukášková, and Stanislav Kráčmar. "REDUCE THE SULPHUR DIOXIDE CONTENT OF WINE BY BIOLOGICAL PROCESS IN RELATION TO THE CONTENT OF POLYPHENOLIC SUBSTANCES." Journal of microbiology, biotechnology and food sciences 11, no. 5 (April 1, 2022): e5975. http://dx.doi.org/10.55251/jmbfs.5975.

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In recent years, many papers have paid attention to the bioactive compounds, particularly to the antioxidant activity of polyphenolic compounds in food and beverages, due to their positive effect on human body. Therefore, the phenolic compounds and their antioxidant capacity become an important quality parameter, especially in niche markets concerned with health benefits. Wine is an excellent source of various classes of polyphenols. The phenolic compounds are responsible for the sensory characteristics, particularly colour, astringency, bitterness, and aroma, too. Another very important ingredient in the wine is added the sulphur dioxide, which has the role to protect these reductive components of wines. Sulphur dioxide has the effects of antioxidant, antimicrobial and preservative that is mutually merging. However, it is possible to increase the stability of the complex of biologically active substances (BAS), as holders of natural antioxidant capacity. The present contribution brings opportunities rather than full elimination, but a substantial reduction of the content of sulphur dioxide, which protects the wine during the entire technological process of manufacture and treatment. The dosage of sulphur dioxide can be reduced in its values from 15 to 40% of the total health of the authorized maximum sulphur dioxide content of wine.

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31

Milella, Lisa. "The Negative Effects of Volatile Sulphur Compounds." Journal of Veterinary Dentistry 32, no. 2 (June 2015): 99–102. http://dx.doi.org/10.1177/089875641503200203.

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32

Watts, Simon F. "Separation and trapping of atmospheric sulphur compounds." Environmental Technology Letters 10, no. 8 (August 1989): 777–83. http://dx.doi.org/10.1080/09593338909384797.

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33

Fowles, G. W. A. "Sulphur compounds in fermented liquors: a review." Journal of Wine Research 5, no. 2 (January 1994): 103–12. http://dx.doi.org/10.1080/09571269408717989.

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34

Kaczmarek, J., and R. Gondko. "Automated determination of sulphur in organic compounds." Mikrochimica Acta 90, no. 3-4 (May 1986): 235–50. http://dx.doi.org/10.1007/bf01364304.

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35

MIN, R., T. SIDORENKO, and A. PLYUSNIN. "Sulphur compounds of West Siberian crude oils." Petroleum Chemistry U.S.S.R. 28, no. 2 (1988): 91–97. http://dx.doi.org/10.1016/0031-6458(88)90015-9.

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36

Volatron, Fran�ois, and Odile Eisenstein. "Valence bond analysis of hypervalent sulphur compounds." Journal of the Chemical Society, Chemical Communications, no. 4 (1986): 301. http://dx.doi.org/10.1039/c39860000301.

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37

Ferm, M. "Throughfall Measurements of Nitrogen and Sulphur Compounds." International Journal of Environmental Analytical Chemistry 50, no. 1 (April 1993): 29–43. http://dx.doi.org/10.1080/03067319308027581.

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38

Mare´cot, P., E. Paraiso, J. M. Dumas, and J. Barbier. "Deactivation of nickel catalysts by sulphur compounds." Applied Catalysis A: General 80, no. 1 (January 1992): 79–88. http://dx.doi.org/10.1016/0926-860x(92)85109-o.

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Mare´cot, P., E. Paraiso, J. M. Dumas, and J. Barbier. "Deactivation of nickel catalysts by sulphur compounds." Applied Catalysis A: General 80, no. 1 (January 1992): 89–97. http://dx.doi.org/10.1016/0926-860x(92)85110-w.

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40

Gowda, C. "Assay of sulphur compounds with 1-chlorobenzotriazole." Talanta 38, no. 12 (December 1991): 1427–30. http://dx.doi.org/10.1016/0039-9140(91)80291-7.

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41

Kietzmann, M. "Sulphur-containing Drugs and Related Organic Compounds." Toxicon 29, no. 3 (January 1991): 395. http://dx.doi.org/10.1016/0041-0101(91)90310-n.

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42

Bettermann, I., and C. Staudt. "Permeation of binuclear, sulphur containing aromatic compounds." Desalination 250, no. 3 (January 2010): 1144–46. http://dx.doi.org/10.1016/j.desal.2009.09.128.

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43

Walker, M. D. "ESTIMATION OF VOLATILE SULPHUR COMPOUNDS IN BEER." Journal of the Institute of Brewing 98, no. 4 (July 8, 1992): 283–87. http://dx.doi.org/10.1002/j.2050-0416.1992.tb01109.x.

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44

Khudheyer Jawad Kadem. "Synthesis of Heterocyclic Compounds Containing Sulphur From Ethylene Diamine Tetra Acetic acid Derivatives." International Journal of Research in Pharmaceutical Sciences 11, SPL4 (December 21, 2020): 1006–11. http://dx.doi.org/10.26452/ijrps.v11ispl4.4236.

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In this work, three novel Schiff's bases subsidiaries were set up from Ethylene Diamine Tetra Acetic corrosive Derivatives(K1, K2 and K3); (K1) which was blend from response of EDTA with 4-hydroxybenzaldehyde and 2,4-dintrophenyl hydrazine. (K2) which was union from response of EDTA with vinilline and 2,4-dintrophenyl hydrazine. (K3) which was amalgamation from response of EDTA with 4-aminoacetophenone and 2,4-dintrophenyl hydrazine after that combination three novel hetrocyclic compound Containing Sulfur molecule; Derivative with compounds containing carbonyl group (aldehyde or ketone) the carbonyl group of aldehyde or ketone react with primary amine to produce mine compounds (Schiff bases), Reaction of produced Schiff base compounds with mercaptoacetic acid (thioglycolic acid) to synthesized new heterocyclic compounds Compounds with heterogeneous ring are characterized by having many biological activities Which attracts the attention of researchers, and accordingly various derivatives containing sulfur were prepared for heterocyclic compounds, these prepared compounds can have inhibitory activity for some bacteria, fungi, and viruses. (M1,M2 and M3)which were union from response of (K1,K2 and K3) individually with marcaptoacetic acid. All of the Schiff’s bases derivatives and hetrocyclic compound Containing Sulphur atom were characterized and identified by spectroscopic methods ( FT-IR and 1H-NMR) spectroscopies.

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45

BONNARME, PASCAL, CARMEN LAPADATESCU, MIREILLE YVON, and HENRY-ERIC SPINNLER. "L-methionine degradation potentialities of cheese-ripening microorganisms." Journal of Dairy Research 68, no. 4 (November 2001): 663–74. http://dx.doi.org/10.1017/s002202990100509x.

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Volatile sulphur compounds are major flavouring compounds in many traditional fermented foods including cheeses. These compounds are products of the catabolism of L-methionine by cheese-ripening microorganisms. The diversity of L-methionine degradation by such microorganisms, however, remains to be characterized. The objective of this work was to compare the capacities to produce volatile sulphur compounds by five yeasts, Geotrichum candidum, Yarrowia lipolytica, Kluyveromyces lactis, Debaryomyces hansenii, Saccharomyces cerevisiae and five bacteria, Brevibacterium linens, Corynebacterium glutamicum, Arthrobacter sp., Micrococcus luteus and Staphylococcus equorum of technological interest for cheese-ripening. The ability of whole cells of these microorganisms to generate volatile sulphur compounds from L-methionine was compared. The microorganisms produced a wide spectrum of sulphur compounds including methanethiol, dimethylsulfide, dimethyldisulfide, dimethyltrisulfide and also S-methylthioesters, which varied in amount and type according to strain. Most of the yeasts produced methanethiol, dimethylsulfide, dimethyldisulfide and dimethyltrisulfide but did not produce S-methylthioesters, apart from G. candidum that produced S-methyl thioacetate. Bacteria, especially Arth. sp. and Brevi. linens, produced the highest amounts and the greatest variety of volatile sulphur compounds including methanethiol, sulfides and S-methylthioesters, e.g. S-methyl thioacetate, S-methyl thiobutyrate, S-methyl thiopropionate and S-methyl thioisovalerate. Cell-free extracts of all the yeasts and bacteria were examined for the activity of enzymes possibly involved in L-methionine catabolism, i.e. L-methionine demethiolase, L-methionine aminotransferase and L-methionine deaminase. They all possessed L-methionine demethiolase activity, while some (K. lactis, Deb. hansenii, Arth. sp., Staph. equorum) were deficient in L-methionine aminotransferase, and none produced L-methionine deaminase. The catabolism of L-methionine in these microorganisms is discussed.

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MOIO, LUIGI, PAOLA PIOMBINO, and FRANCESCO ADDEO. "Odour-impact compounds of Gorgonzola cheese." Journal of Dairy Research 67, no. 2 (May 2000): 273–85. http://dx.doi.org/10.1017/s0022029900004106.

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Volatile concentrates were obtained by vacuum distillation from both natural and creamy Gorgonzola cheese and isolated by continuous liquid–liquid extraction. Both were analysed by high resolution gas chromatography (HRGC), HRGC–mass spectrometry and HRGC–olfactometry. A total of 63 components were identified in the neutral extract of the natural type (21 esters, 13 ketones, 14 alcohols, 5 aldehydes, 1 sulphur compound, 7 aromatic compounds and 2 terpenes) and 52 in the creamy type (17 esters, 12 ketones, 10 alcohols, 5 aldehydes, 1 sulphur compound, 5 aromatic compounds and 2 terpenes). Ketones, whose major components were 2-nonanone and 2-heptanone, were the predominant constituents of the neutral fraction. By olfactometric analysis of the neutral extracts, 23 odour-impact compounds were found in the natural and 21 in the creamy Gorgonzola cheese. 1-Octen-3-ol, ethyl hexanoate, 2-nonanone, 2-heptanone, 2-heptanol, ethyl butanoate, 2-nonanol and 4-methylanisole were the key odorants of the natural cheese, whereas 2-heptanone, 2-heptanol, ethyl butanoate, 3-methyl thiopropanal and an unidentified constituent with a fruity odour were characteristic of the creamy Gorgonzola cheese. On the basis of high odour unity values, 2-nonanone, 1-octen-3-ol, 2-heptanol, ethyl hexanoate, methylanisole and 2-heptanone were the most important odorants of natural and creamy Gorgonzola cheese aroma.

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MICOVÁ, Marianna, Judita BYSTRICKÁ, Ján KOVAROVIČ, Ľuboš HARANGOZO, and Adriana LIDIKOVÁ. "Content of bioactive compounds and antioxidant activity in garlic (Allium sativum L.)." Acta agriculturae Slovenica 111, no. 3 (December 12, 2018): 581. http://dx.doi.org/10.14720/aas.2018.111.3.07.

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Garlic (Allium sativum L.) is highly regarded throughout the world for both its medicinal and culinary properties. With its bioactive compounds and sulphur containing compounds, high trace mineral content, garlic has shown anti-viral, anti-bacterial, anti-fungal and antioxidant abilities.This work has focused on the measurement and comparison of the total polyphenols content, the total sulphur content and antioxidant activity of the studied varieties of garlic in the area of Nitra and Bardejov, Slovak Republic. The highest content of monitored indicators (TPC, TSC, AOA) was measured in the area of Nitra. TPC was determined using the spectrophotometric method of Folin-Ciocalteu agents. The total polyphenols content were determined in the range 621.13 to 763.28 mg kg-1 in area of Nitra. The content of total sulphur compounds in the area of Nitra ranges from 0.562 to 0.800 % and in the second area ranges from 0.421 % to 0.658 %. Antioxidant activity was measured by the spectrophotometric method using a compound DPPH. The value of antioxidant activity ranged from 12.01 % to 20.22 % in both monitored locations. The content of TPC, TSC and AOA beside the variety may be affected by the localitylinked factors like climatic conditions and the agrochemical composition of the soil.

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Myung Cha, Jin, Wol Suk Cha, and Jung-heon Lee. "Removal of organo-sulphur odour compounds by Thiobacillus novellus SRM, sulphur-oxidizing microorganisms." Process Biochemistry 34, no. 6-7 (September 1999): 659–65. http://dx.doi.org/10.1016/s0032-9592(98)00139-3.

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Landry, Jacques, Stéphanie Legris-Delaporte, and Françoise Ferron. "Foliar application of elemental sulphur on metabolism of sulphur and nitrogen compounds in leaves of sulphur-deficient wheat." Phytochemistry 30, no. 3 (January 1991): 729–32. http://dx.doi.org/10.1016/0031-9422(91)85242-r.

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B, Cherubala. "Desulphurization of Commercial Diesel Fuel using Activated Carbon-Based Metal Oxide Nanocomposites." Petroleum & Petrochemical Engineering Journal 6, no. 1 (2022): 1–11. http://dx.doi.org/10.23880/ppej-16000291.

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This paper presents a slight on desulphurization process of the commercial diesel fuel using the carbon-based metal oxide nanocomposites such as graphene oxide, ZnO, rGO as a nano-adsorbent, activated carbon (PAC and AC) and charcoal Granular active carbon (GAC) to produce a fuel less than 10 ppm sulphur content. The synthesised of sorbents were achieved using incipient impregnation, microwaved-assisted and chemical exfoliation methods. The materials were characterized using Thermogrametric Analyzer (TGA), Fourier transform infrared spectroscopy (FTIR) and X-ray diffractometer (XRD), Brunauer, Emmett and Teller (BET) technics. The examination effect of operating conditions on the adsorption capacity with DBT and Sulphur compounds adsorption, the isotherms and the adsorption kinetic models were evaluated. The experimental data for PAC and AC were well suited to Freundlich isotherm and pseudo second-order kinetic models. The results shown that the sulphur feed concentration, the space velocity and the functional groups of the adsorbents had a considerable effect on the adsorption. In addition, it was observed that the temperature in the range of 30 to 600 o C had a significant effect on the adsorption of Sulphur compounds from diesel fuel using 20 wt% of sorbents. The rGO substrate which contained abundant oxygen functional groups promoted the dispersion metal oxide and increased the adsorption efficiency of sulphur compounds (H 2 S, SO 3 and SO 2 ) by providing oxygen ions weakly bound to the sulphur molecules. For the desulfurization process by adsorption, PAC and AC exhibited a better affinity for 85% removal of sulphur compared to the GAC and GO.

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Journal articles on the topic 'Sulphur compounds'

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