Using the Puritan Bennett 1600, twin jet nebulizer modified to a single jet, the particle size, mass median aerodynamic diameter (MMAD), was 0.82 μm ± geometric standard deviation (GSD) = 1.7. A computer model
Atmospheric deposition of aerosols can deliver Fe, a limiting micronutrient, to the remote ocean. Aerosol particle size influences aerosol Fe fractional solubility and air-to-sea deposition rate. Size-segregated aerosols were collected during the 2015 US GEOTRACES cruise in the Arctic Ocean. Results ...
Based upon the lung deposition model developed for continuously inhaling aerosols of constant concentration, a mathematical model of aerosol bolus deposition is proposed. The calculated results show that the recovery depends on the bolus penetration depth, flow rate, particle size, breath holding time ...
including particle size and aerosol velocity [2,3]. For maximum alveolar deposition that aligns with muscarinic receptor distribution in the lung, a particle diameter of ~ 3 μm has been suggested [12,13]. If particles are too small, the aerosol is likely to be exhaled; however, if the...
The specific aims of this dissertation were addressed by: (i) generating DEP aerosols in a size range relevant to lung deposition and characterizing those aerosols; (ii) formulating methods for deposition of those aerosols onto cells in culture; (iii) studying the effects of DEP exposure ...
For the past 40 years, gamma scintigraphy has been the most widely used method to determine lung deposition of inhaled formulations in vivo [119]. Gamma scintigraphy uses radioactive labeling and 2D imaging to measure and quantify where inhaled formulations are deposited, as well as evaluate inhala...
Size distribution of aerosol iron (Fe) concentration and solubility determines their environmental and health impacts but they are rarely reported. In this study, size-resolved aerosol particles were collected in Hangzhou, a Chinese megacity upwind of th
Particles generated from the humidifier operated with tap water had a mass concentration of 0.46 ± 0.03 mg/m3, number concentration of (5.0 ± 1.1) × 104/cm3, and peak size distribution of 183 nm. The particles were phagocytosed by alveolar macrophages in the lung of mice...
(redirected fromaerosol deposition) Thesaurus Medical Encyclopedia aer·o·sol (âr′ə-sôl′, -sŏl′) n. 1.A gaseous suspension of fine solid or liquid particles. 2. a.The spray of fine particles of a substance, such as paint, asthma medication, or insecticide, that is released ...
Particle deposition in the lung depends largely upon three physical mechanisms: (1) impaction, a function of particle inertia; (2) sedimentation due to gravity; and (3) diffusion resulting from Brownian motion of fine, submicrometer (<1 μm) particles. The mass of the particles determines which...