Sulfur compounds generation

DMSP. DMSP and related sulfur compounds generated by planktonic microalgae are involved in a complex series of interactions and reactions that occur in seawater and the atmosphere (Malin et al. 1992 Liss et al. 1994 Malin 1996 Malin and Kirst 1997 Steinke et al. 2002 Yoch 2002). In the oceans, DMS can originate from DMSP that is cleaved during grazing, be directly released by healthy algal cells, or be released when cells senesce or are lysed by viruses (Fig. 8.3). 

Gasification of coal containing organic nitrogen and sulfur compounds generates trace amounts of ammonia and other toxic and corrosive impurities. The ammonia thus formed must be removed prior to combustion of the synthetic gas to reduce the emission of NOx in the gas turbine. The decomposition of ammonia... 

The variety of sulfur compounds generating such carbanion stmctures permitted the development of several synthetic methods for carbon-carbon bond formation. 

Among the major volatile sulfur compounds generated during the preparation of die ketopentose-L-cysteines are 2-methylfuran-3-thiol, 2-furfurylthiol and 3-mercapto-2-pentanone (13, Table I). These compoimds have also been identified as character impact compounds of boiled meat flavor (II, 12). This suggests that ketopentosese-L-cysteines are playing a role in the development of boiled meat flavor. Ketohexose-L-cysteines do not produce these character impact compounds in significant quantities (Table I) and are therefore unlikely to play a role in boiled meat flavor development. 

The sulfur ylide-mediated epoxidation of aldehydes has been thoroughly investigated [70, 71]. The chiral sulfur ylides reported by Aggarwal have been most broadly applicable, and a catalytic, asymmetric process yielding aromatic transepoxides has been developed [72]. In this process, the sulfur ylides are produced in situ from diazo compounds, generated in turn from tosylhydrazone salts (Scheme 9.15) [73],... 

Caution The following reactions should he conducted in a uell-ventilated hood, since in each step evil-smelling sulfur compounds are either used as starting materials or generated during the reaction. 

Generally, the experimental results on electrodeposition of CdS in acidic solutions of thiosulfate have implied that CdS growth does not involve underpotential deposition of the less noble element (Cd), as would be required by the theoretical treatments of compound semiconductor electrodeposition. Hence, a fundamental difference exists between CdS and the other two cadmium chalcogenides, CdSe and CdTe, for which the UPD model has been fairly successful. Besides, in the present case, colloidal sulfur is generated in the bulk of solution, giving rise to homogeneous precipitation of CdS in the vessel, so that it is quite difficult to obtain a film with an ordered structure. The same is true for the common chemical bath CdS deposition methods. 

Benzene releases in byproduct recovery operations Naphthalene residues generated in the final cooling tower Sulfur and sulfur compounds recovered from coke oven gas Wastewater from cleaning and cooling (contains zinc, ammonia still lime, decanter tank tar, or tar distillation residues)... 

Puacz et al. (1995) developed a catalytic method, based on the iodine-azide reaction, for the determination of hydrogen sulfide in human whole blood. The method involves the generation of hydrogen sulfide in an evolution-absorption apparatus. In addition, the method allows for the determination of sulfide in blood without interference from other sulfur compounds in blood. A detection limit of 4 g/dm3 and a percent recovery of 98-102% were achieved. Although the accuracy and precision of the catalytic method are comparable to those of the ion-selective electrode method, the catalytic method is simpler, faster, and would be advantageous in serial analysis. 

In 1912 Delepine observed light generated in the gaseous phase from the vapors of some phosphorus-sulfur compounds in the presence of oxygen [56], Two years later, Bancroft published a paper on the luminescence generated at mercury and other electrodes in the electrolysis of halides [57],... 

Figure 6.3 provides a simplified block diagram of a fuel cell power plant system. Gasification is used to convert the solid fuel to gas, which is processed to remove sulfur compounds, tars, particulates, and trace contaminants. The clean gas is then converted to electricity in the FC. Waste heat from the FC is used to generate steam, which can be used to run the gasification process and to generate additional power in the bottoming cycle. 

The most numerous group of asymmetric syntheses includes reactions of chiral sulfur compounds leading to diastereomeric systems as a result of the generation of a new chiral center and the preserva-... 

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