Gasification is one of the efficient ways to convert the energy embedded in biomass. Understanding of the effect of a few key parameters such as oxygen enrichment and preheating of air on major design parameters is crucial in designing of a biomass gasifier. In the present study, equilibrium modeling is used to predict the performance of a downdraft gasifier. The composition of producer gas and...

Synthesis of prostaglandin H2 by prostaglandin H synthase (PHS) results in a two-electron oxidation of the enzyme. An active reduced enzyme is regenerated by reducing cofactors, which become oxidized. This report examines the mechanism by which PHS from ram seminal vesicle microsomes catalyzes the oxidation of the reducing cofactor N-acetylbenzidine (ABZ). During the conversion of 0.06 mM ABZ t...

Functional analysis indicates that the Cape Minor Ventilator is predominantly a flow generator in the inspiratory phase, electrically powered, time cycled and volume pre-set. Study of methods of oxygen enrichment show that any desired Fioa froTM air to 90% oxygen can be achieved. Clinical evaluation suggests it to be a useful, small, powerful and inexpensive ventilator. The major defect is poor...

A complementary computational and experimental study is carried out on the formation of ultrafine particulate matter in premixed laminar methane air flames. Specifically, soot examined stretch-stabilized flames to observe inception growth at relatively high flame temperatures common oxygen enriched applications. Particle size distribution functions (PSDF) measured by mobility sizing show clear ...

Oxygen enrichment of room air has proved to be valuable for people who need to work at altitudes of 4000 m and above. In the present study the feasibility of using the same technique in ski and other mountain resorts at the lower altitudes of 2500 to 4000 m is considered. Although many people find these altitudes invigorating, some are distressed by the hypoxia, especially at night. The analysi...

Results from photometry and high-resolution spectroscopy have demonstrated the existence of multiple populations in globular clusters, where one or more stellar generations stars coexist with original population. We study possibility that new generation(s) formed gas lost by intermediate mass (4–8 M⊙) during asymptotic giant branch (AGB) evolution, possibly after dilution residual pristine clus...