Experimental studies have provided convincing evidence that aerosol-phase heterogeneous chemical reactions (possibly acid-catalyzed) are involved to some extent in the formation of secondary organic aerosol (SOA). We present a stepwise procedure to determine physical properties such as heats of formation, standard entropies, Gibbs free energies of formation, and solvation energies from quantum ...

After baseline measurements of lung mechanics, effective air space diameter (EAD), and aerosol dispersion (AD), three dogs were exposed to two treatments of aerosolized papain (3 ml of a 4% solution), and measurements were repeated during a 28-wk follow-up period. EAD and AD were measured with boluses of 0.7-micrometer particles of di-2-ethylhexl sebacate, with Pen (i.e., volumetric bolus penet...

Aerosols represent one of the greatest uncertainties in quantifying atmospheric sources of climate change. The role of aerosol particles in providing nucleation sites for cloud droplets is complex: this so-called “indirect effect” incorporates unsolved problems in atmospheric chemistry, thermodynamics, and fluid mechanics. Much of this uncertainty lies in our inability to describe the processes...

background: melaleuca cajuputi essential oil in aerosol spray was evaluated against the dengue vectors aedes ae­gypti and ae. albopictus at low cost housing flats in section 10, setapak, kuala lumpur, malaysia. methods: essential oil in aerosol viz: 5% and 10% of concentrations were sprayed for 5 seconds each towards hung mos­quitoes in 5 cylindrical net cages. aerosol weights were recorded bef...

The present study is the first attempt to examine temporal and spatial characteristics of aerosol properties and classify their modes over Iran. The data used in this study include the records of Aerosol Optical Depth (AOD) and Angstrom Exponent (AE) from MODerate Resolution Imaging Spectroradiometer (MODIS) and Aerosol Index (AI) from the Ozone Monitoring Instrument (OMI), obtained from 2005 t...

Chitosan-graft-polyethylenimine (CHI-g-PEI) copolymer has been used for theimprovement of low transfection efficiency of chitosan. The present study aims to test thepulmonary toxicity and efficiency of CHI-g-PEI as an aerosol gene carrier. Mice were exposedto aerosol containing green-fluorescent protein (GFP)-polyethylenimine (PEI) or GFP-CHIg-PEI complexes for 30 min during the development of ...

background: bio aerosols include airborne micro-organisms such as bacteria, fungi, viruses, etc and their products. exposure to a bio aerosol is linked with a broad spectrum of health problems, including infectious diseases, acute toxic effects, allergies, and cancer. the aim of this study was to evaluate the quality and quantity of bio aerosols found in the air of different wards in valiasr ho...

Chitosan-graft-polyethylenimine (CHI-g-PEI) copolymer has been used for theimprovement of low transfection efficiency of chitosan. The present study aims to test thepulmonary toxicity and efficiency of CHI-g-PEI as an aerosol gene carrier. Mice were exposedto aerosol containing green-fluorescent protein (GFP)-polyethylenimine (PEI) or GFP-CHIg-PEI complexes for 30 min during the development of ...

fifty-nine samples of washed and unwashed leaves of 4 species of plants in tehran and 24 similar samples of the suburb (as control) were analyzed for pb content. a significant difference was seen between pb contents of washed and unwashed urban samples, while no significant difference was observed between the control samples. the mean pb contents of the urban suburb samples were also significan...