Tropospheric ozone, lot-med from nonlinear reactions between VOC5 and nitrogen oxides (NOr), is a primarr constituent of urban smog (1). Estimates of VOC control costs needed to attain the National Ambient Air Quality Standard (NAAQS) for ozone of 0.12 parts per million are on the order of billions of dollars per year, and in the most severely impacted region~, the necessary control technologie...

reactivity controlled compression ignition (rcci) is a novel combustion concept which uses port fuel injection (pfi) of a low reactivity fuel and direct injection (di) of a high reactivity fuel with optimum multiple injection to provide a stratified mixture inside the combustion chamber. piston bowl design has a considerable effect on engine’s pollutant emissions specially unburned hydrocarbons...

Advances in design of materials for solid oxide fuel cells, oxygen and hydrogen separation membranes, catalysts biofuel conversion into syngas are reviewed. Application new efficient techniques material synthesis characterization their atomic-scale structure, transport properties, reactivity allowed to develop types cathodes anodes asymmetric supported oxygen, membranes with high permeability s...

The current study examined the frequency and associated distress of both hairpulling and skin picking behaviors in 1,324 college students using the Massachusetts General Hospital Hairpulling Scale (MGHHS) and Skin Picking Scale (SPS). In this sample, many participants reported significant distress secondary to both hairpulling and skin picking. Participants who endorsed relatively frequent hair...

Background: Several studies reported the clinical features of IgE-mediated hypersensitivity after ingestion of melon. Melon allergy is a common IgE-mediated fruit allergy in Iran. This prompted us to investigate immunochemical and molecular properties of the major allergen in melon fruit, to compare the IgE-binding capacity of the natural protein with the recombinant allergen, and to determine ...

In this paper, a numerical study is performed to provide the combustion and emission characteristics resulting from fuel-reactivity controlled compression ignition (RCCI) combustion mode in a heavy-duty, single-cylinder diesel engine with gasoline and diesel fuels. In RCCI strategy in-cylinder fuel blending is used to develop fuel reactivity gradients in the combustion chamber that result in a ...