Dimesitylbisanthene (1) oxidizes to the corresponding bay region quinone (2) on standing in solutions exposed to air and ambient light. It is anticipated that hydrogen-terminated carbon nanotubes with bay regions on the rim are likely to exhibit even greater sensitivity toward air oxidation.

The increasing use of fuels derived from oil, deepens concern about the fact that non-fossil fuels have to be considered as the fuels of the future. Among the alternatives, hydrogen produced from the abundant sources of water, seems to be one of the best, but it suffers drawbacks with regard to combustion, storage and transportation. The other alternatives are ammonia, produced from unlimited s...

This study reports measurements of stability limits and exhaust NO mole fractions technically-premixed swirl ammonia-air flames enriched with either methane or hydrogen. Experiments were conducted at different pressures from atmospheric to 5 bar, representative commercial micro gas turbines. The full range ammonia in the fuel blend, xNH3, was considered, 0 (pure hydrogen) 1 ammonia), covering v...

In order to understand retention and release behaviors of plasma-loaded hydrogen in ferritic steels, hydrogen depth profiles were examined by means of a tritium imaging plate technique (TIPT). Hydrogen release was strongly affected by trapping effect in bulk and/or barrier effect of surface oxide layers during long term storage in air at room temperature (RT) and even heating in vacuum. Helium ...

Different models of hypersonic diffusive hydrogen combustion in a thin viscous shuck layer (TVSL) at moderate Reynolds numbers have been developed. The study is based on computations of nonequilibrium multicomponent flowfield parameters of air-hydrogen mixture in the TVSL near the blunt probe. The structure of computed combustion zones is analyzed. Under conditions of slot and uniform injection...

It is well established that oxidative stress is an important cause of cell damage associated with the initiation and progression of many diseases. Consequently, all air-living organisms contain antioxidant enzymes that limit oxidative stress by detoxifying reactive oxygen species, including hydrogen peroxide. However, in eukaryotes, hydrogen peroxide also has important roles as a signaling mole...

1. A simple method is described for measuring the hydrogen concentration in alveolar air by end-expiratory sampling, by using a modified Haldane-Priestley tube and gas chromatography. Hydrogen was generated in vivo by ingestion of the non-absorbable sugar lactulose. 2. Alveolar hydrogen concentration showed a highly significant correlation with hydrogen production measured either by a rebreathi...

This study investigates experimentally the effects of hydrogen addition in the intake manifold of a diesel generator operating with a 7% biodiesel-diesel oil blend (B7). An experimental apparatus setup was used to conduct performance and emissions tests in a single cylinder, air cooled diesel engine. This setup consisted of a generator set connected to a wirewound resistor load bank that was us...