Comparison of experimental and computational results of aerosol deposition in the oro-pharyngeal cast of human published recently (Sosnowski TR, Moskal A, Gradoń L. (2006) Inhal Toxicol; 18: 773-780) demonstrated the applicability and relevance of considering realistic breathing patterns in analysis of aerosol flow and deposition within the human head airways. This issue is extended in the curr...

[1] Organic aerosol alters cloud and fog properties through surface tension and solubility effects. This study characterizes the role of organic compounds in affecting fog droplet number concentration by initializing and comparing detailed particle microphysical simulations with two field campaigns in the Po Valley. The size distribution and chemical composition of aerosol were based on the mea...

Aerosol particles in the marine boundary layer (MBL) are transported from their source region and processed in the atmosphere, and are therefore often mixtures of inorganic (e.g. SO4 2−, NH4 , and NO3 −) and organic components (e.g. carboxylic acid, hydroxyl, and saturated aliphatic functional groups). Although the solubility of inorganic aerosol components is fairly well known, the large numbe...

This paper presents a general concept and mathematical framework of particle hygroscopicity distribution for the analysis and modeling of aerosol hygroscopic growth and cloud condensation nucleus (CCN) activity. The cumulative distribution function of particle hygroscopicity, H(κ,Dd) is defined as the number fraction of particles with a given dry diameter, Dd, and with an effective hygroscopici...

The paper is dedicated to the description of the algorithm of calculation of the equilibrium gas-phase concentration at the surface of the aerosol particle – a parameter, which defines the rate of mass transport between the gas and aerosol phases in the kinetic models of atmospheric aerosol dynamics. Some problems concerning deducing of the surface equilibrium gasphase concentrations from therm...

A system is disclosed for condensation particle counting in conjunction with modifying an aerosol to enhance the formation and growth of droplets of a selected working fluid, preferably water. Before saturation with the working fluid, the aerosol is exposed to an aerosol modifying component, preferably a vapor including molecules that are adsorbed onto surfaces of the particles or other element...

Original scientific paper Aerosol particle thickness measurements were performed at the "Politehnika" University in Timisoara (Romania) during March 2011 using a CIMEL SUN solar photometer, as part of the global AERONET network. The aerosol optical thickness (AOT) represents a parameter of optical visibility in an atmospheric air column from the instrument towards the sun, affected by the prese...

This paper introduces the capability to study simultaneously changes in the density, the chemical composition, the mobility diameter, the aerodynamic diameter, and the layer thickness of multi-layered aerosol particles as they are being altered by heterogeneous chemical reactions. A vaporization-condensation method is used to generate aerosol particles composed of oleic acid outer layers of 2 t...

Size-segregated aerosol samples were collected during the QUEST field campaign at Hyytiälä, a boreal forest site in Southern Finland, during spring 2003. Aerosol samples were selectively collected during both particle formation events and periods in which no particle formation occurred. A comprehensive characterisation of the aerosol chemical properties (water-soluble inorganic and organic frac...

The acceptability and pharmacology of intermittent aerosol administration of amantadine was assessed in healthy volunteers. Amantadine solutions of 2.5, 1.5, or 1.0 g/100 ml were used for 12 30-min, twice-daily aerosol treatments in 15 subjects. Overall, the aerosol treatments were well tolerated. During and up to 1 h after aerosol exposures, nasal irritation, rhinorrhea, dysgeusia, or a combin...