Hydrogen production degradation

Patsoura, A., Kondarides, D.I., and Verykios, X.E. (2006) Enhancement of photoinduced hydrogen production from irradiated Pt/Ti02 suspensions with simultaneous degradation of azo-dyes. Applied Catalysis B Environmental,... 

While 02 serves as the electron acceptor in aerobic biodegradation processes forming H20 as the final product, degradation in anaerobic systems depends on alternative electron acceptors such as sulfate, nitrate or carbonate, which yield, ultimately, hydrogen sulfide (H2S), molecular nitrogen (N2) and/or ammonia (NH3) and methane (CH4), respectively. 

The hydrogenated products are nitrile rubber, with good heat resistance, and styrene-butadiene-styrene copolymer, with high tensile strength, better permeability and degradation resistance. 

Demirbas, A. 2005a. Hydrogen production via pyrolytic degradation of agricultural residues. Energy Sources 27 769-775. 

The preceding degradations and transformations of pseudoakuammigine are in consonance with, but do not prove, the structures proposed it is therefore noteworthy that the mass spectrum of LIV, the hydrogenation product of LIII, is in complete accord with this geminal diamino structure (48). 

Two cytotoxic spermidine derivatives were isolated as a mixture from the Pacific soft coral Sinularia brongersmai 5,12-dimethyl-1-dimethylamino-5,9-diazaheneicos-l l-en-10-one (35) and its 11,12-dihydroderivative 36 (ratio 9 1). By hydrogenation of the mixture, a single compound was obtained that corresponded by GC/MS analysis to the minor component of the original mixture. Hydrolysis followed by esterification of the hydrogenated product 36 afforded methyl 3-methyldodecanoate and N,N,N-tri-methylspermidine. The results of a Hofmann degradation of 36 confirmed the conclusion on mass spectral evidence that the primary amide nitrogen is bonded to the trimethylene chain of the unsymmetrical spermidine molecule (61). 

The synthesis and characterization of the hydrogenation product of polystyrene (PS), poly(cyclohexylethylene) (PCHE), have been the subject of persistent research efforts. The earliest published report on this material dates to 1929, with new work appearing steadily up to the present. The primary motivation for saturating the phenyl rings in polystyrene is the potential to improve the stability of polystyrene with respect to oxidative and radiation-induced degradation. It has now also been established that the hydrogenation of polystyrene leads to a substantial increase in the glass transition temperature (Tg). 

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