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An experimental investigation on the settling velocity and drag coefficient of micrometer-sized natural, IG-110, NG-CT-10 and A3-3 graphite particles J. Aerosol Sci. (IF 2.649) Pub Date : 2021-02-18 Zhu Fang; Yiyang Zhang; Shumiao Zhao; Xiaowei Li; Xinxin Wu; Libin Sun
Micrometer-sized graphite particles are widely found in nature and industry. Particularly, the graphite dust is an important problem for the pebble-bed high temperature gas-cooled reactor (HTGR), regarding the coupling with the fission products (FPs). Due to the highly irregular disk-like shape, a great gap still exists for understanding the transport-related behaviors of real graphite particles, including
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A novel approach for reducing uncertainties in soot volume fraction estimates from light extinction measurements J. Aerosol Sci. (IF 2.649) Pub Date : 2021-02-18 Nitesh Gupta; Anand Sankaranarayanan; Reshmi Sasidharakurup; Arindrajit Chowdhury; Neeraj Kumbhakarna
Studies on the combustion of isolated droplets are crucial for gaining insights into the mechanisms of soot formation and destruction in practical combustion devices involving liquid fuels. The light extinction (LE) method is arguably the most popular technique for quantifying soot in laboratory flames and has been used frequently for investigating droplet flames. Fluctuation in the intensity of the
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Background PM10 atmosphere: In the seek of a multifractal characterization using complex networks J. Aerosol Sci. (IF 2.649) Pub Date : 2021-02-17 Thomas Plocoste; Rafael Carmona-Cabezas; Francisco José Jiménez-Hornero; Eduardo Gutiérrez de Ravé
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The effect of incident angle on the rebound behavior of micro-particle impacts J. Aerosol Sci. (IF 2.649) Pub Date : 2021-02-20 Jun Xie; Zhengren Zhu; Tianhua Yang; Ming Dong; Rundong Li
Particle deposition exists widely in life and industrial production. The particle-particle or particle-wall impact is the fundamental problem to exact description of particle deposition process. In this paper, the processes of SiO2 micro-particles impacting onto a flat SUS316 stainless steel with different incident angles under different incident velocities were experimentally studied under normal
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Translating nanoparticle dosimetry from conventional in vitro systems to occupational inhalation exposures J. Aerosol Sci. (IF 2.649) Pub Date : 2021-02-17 Jordan Ned Smith; Andrew W. Skinner
As encouraged by Toxicity Testing in the 21st Century, researchers increasingly apply high-throughput in vitro approaches to identify and characterize nanoparticle hazards, including conventional aqueous cell culture systems to assess respiratory hazards. Translating nanoparticle dose from conventional toxicity testing systems to relevant human exposures remains a major challenge for assessing occupational
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Characterization of a Kanomax® fast condensation particle counter in the sub-10 nm range J. Aerosol Sci. (IF 2.649) Pub Date : 2021-02-17 Yiliang Liu; Michel Attoui; Yueyang Li; Jianmin Chen; Qing Li; Lin Wang
A butanol-based fast condensation particle counter (Fast CPC, Model 3650, Kanomax Inc., Japan) was characterized in this study with three different types of monodisperse particles, including positively and negatively charged nickel-chromium (Ni/Cr) particles, positively charged tetraheptyl ammonium bromide (THABr) and tetrabutyl ammonium bromide (TBABr) particles, and positively charged polyethylene
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Computational analysis of a 3D mucociliary clearance model predicting nasal drug uptake J. Aerosol Sci. (IF 2.649) Pub Date : 2021-02-04 Sriram Chari; Karthik Sridhar; Ross Walenga; Clement Kleinstreuer
Accurate and realistic predictions of the fate of nasally inhaled drugs help to understand the complex fluid-particle dynamics in the nasal cavity. Key elements of such a comprehensive numerical analysis include: (i) inhaled drug-aerosol transport and deposition with air-particle-mucus interactions; and (ii) mucociliary clearance (MCC) dynamics, including drug transport, dissolution and absorption
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Deposition characteristics of soot and tire-wear particles on urban tree leaves J. Aerosol Sci. (IF 2.649) Pub Date : 2021-02-04 Min-Cheol Cho; Yeong-Gwon Jo; Joung A Son; Iereh Kim; Changyoung Oh; Se-Jin Yook
This study aims to analyze the deposition characteristics of particles of major tree species in urban areas of Korea by conducting experiments. To simulate black carbon (BC) particles emitted by automobiles among particulate matter floating in the roadside air, soot particles are generated using a diffusion flame burner, whereas tire wear particles are generated by the mechanical friction between tires
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Computational investigation of prolonged airborne dispersion of novel coronavirus-laden droplets J. Aerosol Sci. (IF 2.649) Pub Date : 2021-02-08 Masashi Yamakawa; Atsuhide Kitagawa; Kiyota Ogura; Yongmann M. Chung; Minsuok Kim
We have performed highly accurate numerical simulations to investigate prolonged dispersion of novel coronavirus-laden droplets in classroom air. Approximately 10,900 virus-laden droplets were released into the air by a teacher coughing and tracked for 90 min by numerical simulations. The teacher was standing in front of multiple students in a classroom. To estimate viral transmission to the students
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Tutorial: Langevin Dynamics methods for aerosol particle trajectory simulations and collision rate constant modeling J. Aerosol Sci. (IF 2.649) Pub Date : 2021-02-07 Vikram Suresh; Ranganathan Gopalakrishnan
The Langevin Dynamics (LD) method (also known in the literature as Brownian Dynamics) is routinely used to simulate aerosol particle trajectories for transport rate constant calculations as well as to understand aerosol particle transport in internal and external fluid flows. This tutorial intends to explain the methodological details of setting up a LD simulation of a population of aerosol particles
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Inhaled aerosol dosimetry: Research-related needs and recommendations J. Aerosol Sci. (IF 2.649) Pub Date : 2021-02-04 Robert F. Phalen; Mark D. Hoover; Michael J. Oldham; Annie M. Jarabek
Inhaled aerosols whether beneficial or harmful express their effects depending on the amount initially deposited in the body (i.e. the deposition dose), with clearance mechanisms including dissolution, mucociliary transport and translocation then determining retained dose in the respiratory tract. The many regions of the respiratory tract differ in their shapes, cellular makeups, defenses, and pathologies
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Technical note: Understanding the effect of COVID-19 on particle pollution using a low-cost sensor network J. Aerosol Sci. (IF 2.649) Pub Date : 2021-02-05 E. Chadwick; K. Le; Z. Pei; T. Sayahi; C. Rapp; A.E. Butterfield; K.E. Kelly
The 2020 coronavirus pandemic and the following quarantine measures have led to significant changes in daily life worldwide. Preliminary research indicates that air quality has improved in many urban areas as a result of these measures. This study takes a neighborhood-scale approach to quantifying this change in pollution. Using data from a network of citizen-hosted, low-cost particulate matter (PM)
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Atmospheric aging processes of bioaerosols under laboratory-controlled conditions: A review J. Aerosol Sci. (IF 2.649) Pub Date : 2021-02-04 Yong-Le Pan; Aimable Kalume; Chuji Wang; Joshua Santarpia
We present a comprehensive update on the studies of atmospheric aging processes for airborne bioaerosols under various laboratory-controlled conditions. We reviewed changes in physical, chemical, and biological properties of aerosolized biological organisms suspended in air under different simulated environmental parameters or open air factors (OAFs). These changes were scrutinized by measuring viability
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Dissipation and adhesion in collisions between amorphous FeO nanoparticles J. Aerosol Sci. (IF 2.649) Pub Date : 2021-01-22 Baochi D. Doan; Adrienne R. Dove; Patrick K. Schelling
How dust grains aggregate into planetesimals is still an open question. It is experimentally observed that binary collisions between micron-sized dust grains result in adhesion for collisions up to ∼1 ms−1. However, aggregates at scales ∼1 mm and above have been shown to exhibit fragmentation or bouncing at relevant collision velocities, resulting in a barrier preventing the formation of larger aggregates
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Effect of flow geometry on the nanoparticle output of a spark discharge generator J. Aerosol Sci. (IF 2.649) Pub Date : 2021-01-20 Dániel Megyeri; Attila Kohut; Zsolt Geretovszky
Spark discharge nanoparticle generators (SDGs) employ the method of spark ablation to generate nanoparticles (NPs) in the gas phase. The material plume ablated from two bulk electrodes is quenched and carried away by a controlled gas flow. The electrical circuit needed to maintain sparking and the gas/aerosol handling are usually rather simple to implement, therefore many different SDG designs exist
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3D printer particle emissions: Translation to internal dose in adults and children J. Aerosol Sci. (IF 2.649) Pub Date : 2021-01-29 Peter Byrley; William K. Boyes; Kim Rogers; Annie M. Jarabek
Desktop fused deposition modeling (FDM®) three-dimensional (3D) printers are becoming increasingly popular in schools, libraries, and among home hobbyists. FDM® 3D printers have been shown to release ultrafine airborne particles in large amounts, indicating the potential for inhalation exposure and consequent health risks among FDM® 3D printer users and other room occupants including children. These
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Performance comparison of SMPSs with soft X-ray and Kr-85 neutralizers in a humid atmosphere J. Aerosol Sci. (IF 2.649) Pub Date : 2021-01-21 Yiliang Liu; Michel Attoui; Jianmin Chen; Qing Li; Lin Wang
Scanning mobility particle sizer (SMPS) is widely used for particle number size distribution measurements of submicron particles. In this work, two TSI® SMPSs equipped with a soft X-ray neutralizer and a Kr-85 neutralizer, respectively, were operated in parallel to measure particle number size distributions of ambient air. An independent TSI® ultrafine condensation particle counter (CPC) was used as
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Inter-species variabilities of droplet transport, size change, and deposition in human and rat respiratory systems: An in silico study J. Aerosol Sci. (IF 2.649) Pub Date : 2021-01-23 Hamideh Hayati; Yu Feng; Myron Hinsdale
To speculate on human responses from animal studies, scale-up factors (body weight, lung volume, or lung surface area ratios) are currently used to extrapolate aerosol lung deposition from animal to human. However, those existing scale-up methods between animals and humans neglected two important inter-subject variability factors: (1) the effect of anatomical differences in respiratory systems from
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Composite micro/nano fibrous air filter by simultaneous melt and solution electrospinning J. Aerosol Sci. (IF 2.649) Pub Date : 2021-01-19 Dalia Buivydiene; Ana M. Todea; Christof Asbach; Edvinas Krugly; Dainius Martuzevicius; Linas Kliucininkas
This article presents a novel approach towards tackling the balance between filter efficiency and pressure drop by layering micro and nano fibres using melt and solution electrospinning. Polyamide fibre mats were fabricated by a prototype fibre printing apparatus, based on a combination of melt and solution electrospinning. Fibrous mats with favorable filtration performance characteristics were developed
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Insights into the evaporation characteristics of saliva droplets and aerosols: Levitation experiments and numerical modeling J. Aerosol Sci. (IF 2.649) Pub Date : 2021-01-22 Christian Lieber; Stefanos Melekidis; Rainer Koch; Hans-Jörg Bauer
Understanding the transmission phenomena of SARS-CoV-2 by virus-laden droplets and aerosols is of paramount importance for controlling the current COVID-19 pandemic. Detailed information about the lifetime and kinematics of airborne droplets of different size is relevant in order to evaluate hygiene measures like wearing masks but also social distancing and ventilation concepts for indoor environments
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Molecular dynamics simulations of homogeneous nucleation of liquid phase in highly supersaturated propylene glycol vapors J. Aerosol Sci. (IF 2.649) Pub Date : 2020-12-31 Sergey N. Maximoff; Ali Salehi; Ali A. Rostami
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Shaping electrospray deposition profile by a quadrupole: From circular to elliptical patterns J. Aerosol Sci. (IF 2.649) Pub Date : 2021-01-14 Huihui Xia; Boyang Yu; Kai Chang; Xinyan Zhao; Weiwei Deng
Thin films deposited by conventional electrospray of volatile solutions often give rise to rough morphology consisting of “coffee rings” formed by individual sessile droplets. This is due to the long average inter-droplet distance and low merging probability of deposited droplets within the sprayed circular area. We present a quadrupole configuration to form a squeezing electric field that compresses
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Examination of the evolution of iron oxide nanoparticles in flame spray pyrolysis by tailored in situ particle sampling techniques J. Aerosol Sci. (IF 2.649) Pub Date : 2020-12-08 R. Tischendorf; M. Simmler; C. Weinberger; M. Bieber; M. Reddemann; F. Fröde; J. Lindner; H. Pitsch; R. Kneer; M. Tiemann; H. Nirschl; H.-J. Schmid
In this report, a flame spray pyrolysis setup has been examined with various in situ extraction methods of particle samples along the flame axis. First, two precursor formulations leading to the formation of iron oxide nanoparticles were used in a standardized SpraySyn burner system, and the final particle outcome was characterized by a broad range of established powder characterization techniques
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Deposition features of inhaled viral droplets may lead to rapid secondary transmission of COVID-19 J. Aerosol Sci. (IF 2.649) Pub Date : 2021-01-09 Yidan Shang; Yao Tao; Jingliang Dong; Fajiang He; Jiyuan Tu
Inhaled viral droplets may immediately be expelled and cause an escalating re-transmission. Differences in the deposition location of inhaled viral droplets may have a direct impact on the probability of virus expelling. This study develops a numerical model to estimate the region-specific deposition fractions for inhalable droplets (1–50 μm) in respiratory airways. The results identified a higher
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Assessment of a regulatory measurement system for the determination of the non-volatile particulate matter emissions from commercial aircraft engines J. Aerosol Sci. (IF 2.649) Pub Date : 2020-12-10 John S. Kinsey; Robert Giannelli; Robert Howard; Brandon Hoffman; Richard Frazee; Michael Aldridge; Cullen Leggett; Katherine Stevens; David Kittelson; William Silvis; Jeffrey Stevens; Prem Lobo; Steven Achterberg; Jacob Swanson; Kevin Thomson; Timothy McArthur; Donald Hagen; Max Trueblood; Mikal Durlicki
The SAE International has published Aerospace Information Report (AIR) 6241 which outlined the design and operation of a standardized measurement system for measuring non-volatile particulate matter (nvPM) mass and number emissions from commercial aircraft engines. Prior to this research, evaluation of this system by various investigators revealed differences in nvPM mass emissions measurement on the
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CFD simulations to improve the aerosol tangential inlet of a Differential Mobility Analyzer J. Aerosol Sci. (IF 2.649) Pub Date : 2020-12-24 I. Ibarra; J.J. Rodriguez-Maroto; E. Rojas; D. Sanz
Differential Mobility Analyzers (DMA) have been studied for decades to classify a wide range of particle sizes. Its correct behavior is determined by the resolution, influenced by Brownian diffusion losses, distortions in the electric and flow field. The design configuration, especially inlets and outlets, can be a reason of these effects, affecting the DMA reliability. One of these configurations
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Evidence of inter-particles collision effect in airflow resuspension of poly-dispersed non-spherical tungsten particles in monolayer deposits J. Aerosol Sci. (IF 2.649) Pub Date : 2020-12-24 Anthony Rondeau; Samuel Peillon; Ana M. Vidales; Jesica Benito; Rodolfo Uñac; Jean-Christophe Sabroux; François Gensdarmes
Poly-dispersed particle resuspension by turbulent airflow was experimentally studied in a wind tunnel called BISE. The set-up was carefully validated to produce reference airflows with three absolute pressures and friction velocities values. Monolayer deposits of poly-dispersed tungsten particles on tungsten surfaces were used for the experiments. The fraction of detached particles by size bin from
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Ion induced nucleation based-generator of strictly singly charged (solid - liquid) polydisperse particles up to 1 μm J. Aerosol Sci. (IF 2.649) Pub Date : 2020-12-14 Michel Attoui
Calibration of optical counters, condensation particle counters, electrical impactors, filtration efficiency measurement, heterogeneous condensation (and many other laboratory applications in aerosol science and technology) are widely used with singly charged particles classified by a differential mobility analyzer with particles smaller than 1 μm. Nevertheless the method presents an ambiguity because
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Atmospheric clusters to nanoparticles: Recent progress and challenges in closing the gap in chemical composition J. Aerosol Sci. (IF 2.649) Pub Date : 2020-12-11 James N. Smith; Danielle C. Draper; Sabrina Chee; Michelia Dam; Hayley Glicker; Deanna Myers; Adam E. Thomas; Michael J. Lawler; Nanna Myllys
Aerosol nanoclusters (AN), defined here as molecular aggregates suspended in a gas with dimensions between 2 and 10 nm, are the link between substances that we think of as molecules, or the “gas phase,” and those that we consider as particles, or the “condensed phase.” The ability to measure and model the physical and chemical properties of size-resolved AN, which at present is rudimentary at best
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Generating an aerosol of homogeneous, non-spherical particles and measuring their bipolar charge distribution J. Aerosol Sci. (IF 2.649) Pub Date : 2020-11-23 Tyler J. Johnson; Robert T. Nishida; Xiao Zhang; Jonathan P.R. Symonds; Jason S. Olfert; Adam M. Boies
The Aerodynamic Aerosol Classifier (AAC) and Differential Mobility Analyzer (DMA) are aerosol classifiers commonly used to generate a monodispersed aerosol by selecting particles within a narrow range of relaxation times or electrical mobilities, respectively. However, generating an aerosol of homogeneous particles, which has narrow ranges of particle mass, mobility and relaxation time simultaneously
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Lung deposition versus inhalable sampling to estimate body burden of welding fume exposure: A pilot sampler study in stainless steel welders J. Aerosol Sci. (IF 2.649) Pub Date : 2020-11-20 Ashley Newton; Berrin Serdar; Karin Adams; L. Miriam Dickinson; Kirsten Koehler
This pilot study evaluated the ability of a lung deposition sampler (LDS) to estimate body burden by comparing lung-deposited and inhalable nickel and chromium exposures to biomarkers of internal dose. A cohort of stainless steel welders (N = 18) wore side-by-side inhalable and lung deposition samplers for two Monday shifts and urine samples were collected pre- and post-shift. Samplers were analyzed
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Multispecies aerosol evolution and deposition in a human respiratory tract cast model J. Aerosol Sci. (IF 2.649) Pub Date : 2020-11-28 Mahdi Asgari; Francesco Lucci; Arkadiusz K. Kuczaj
Accurate predictions of aerosol transport, evolution, and deposition in the human airways are crucial for inhalation dosimetry investigations. Inhaled aerosol transported through the airways undergoes thermodynamic changes due to changes in temperature and humidity. Aerosol evolution processes are particularly important for liquid multispecies aerosols. These aerosols are sensitive to condensation
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A review of contact force models between nanoparticles in agglomerates, aggregates, and films J. Aerosol Sci. (IF 2.649) Pub Date : 2020-11-20 Stefan Christian Endres; Lucio Colombi Ciacchi; Lutz Mädler
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Investigation on sub-23 nm particles and their volatile organic fraction (VOF) in PFI/DI spark ignition engine fueled with gasoline, ethanol and a 30 %v/v ethanol blend J. Aerosol Sci. (IF 2.649) Pub Date : 2020-11-27 Silvana Di Iorio; Francesco Catapano; Agnese Magno; Paolo Sementa; Bianca Maria Vaglieco
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A systematic investigation on the effects of temperature and relative humidity on the performance of eight low-cost particle sensors and devices J. Aerosol Sci. (IF 2.649) Pub Date : 2020-11-13 Yangyang Zou; Jordan D. Clark; Andrew A. May
Low-cost particle sensors are rapidly gaining popularity for indoor air quality monitoring, but their accuracy has been shown to vary among products and among environments in which they operate. Previous research has explored the effect of environmental conditions including temperature and humidity on sensor accuracy and found appreciable effects of these variables in many cases. We extend this work
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Morphology of particulate deposits formed on a single filter fibre by exposure to mixed aerosol flow J. Aerosol Sci. (IF 2.649) Pub Date : 2020-11-15 Julian Zoller; Amin Zargaran; Kamil Braschke; Jörg Meyer; Uwe Janoske; Achim Dittler
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The effects of meteorological conditions and long-range transport on PM2.5 levels in Hanoi revealed from multi-site measurement using compact sensors and machine learning approach J. Aerosol Sci. (IF 2.649) Pub Date : 2020-11-11 Bich-Thuy Ly; Yutaka Matsumi; Tuan V. Vu; Kazuhiko Sekiguchi; Nguyen Thi Thu Thuy; Pham Chau Thuy; Trung-Dung Nghiem; Ich-Hung Ngo; Yuta Kurotsuchi; Nguyen Thi Thu Hien; Tomoki Nakayama
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Air quality during and after the commonwealth Games 2018 in Australia: Multiple benefits of monitoring J. Aerosol Sci. (IF 2.649) Pub Date : 2020-11-10 Tara Kuhn; Rohan Jayaratne; Phong Thai; Bryce Christensen; Xiaoting Liu; Matthew Dunbabin; Riki Lamont; Isak Zing; David Wainwright; Christian Witte; Donald Neale; Lidia Morawska
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Aerosol dynamics simulations of the anatomical variability of e-cigarette particle and vapor deposition in a stochastic lung J. Aerosol Sci. (IF 2.649) Pub Date : 2020-11-06 Lukas Pichelstorfer; Renate Winkler-Heil; Michael Boy; Werner Hofmann
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The effectiveness of drones in measuring particulate matter J. Aerosol Sci. (IF 2.649) Pub Date : 2020-11-03 Hayden A. Hedworth; Tofigh Sayahi; Kerry E. Kelly; Tony Saad
The use of low-cost air pollution sensors mounted on drones is an exciting new approach to conduct affordable and highly resolved air quality measurements. However, the air flow around a drone consists of complex, unsteady turbulent structures which interact directly with ambient particulate matter and gases. These interactions influence the transport of fine particulate matter (e.g. PM2.5) and, subsequently
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Optimization of an air-liquid interface in vitro cell co-culture model to estimate the hazard of aerosol exposures J. Aerosol Sci. (IF 2.649) Pub Date : 2020-10-31 Rui-Wen He; Hedwig M. Braakhuis; Rob J. Vandebriel; Yvonne C.M. Staal; Eric R. Gremmer; Paul H.B. Fokkens; Claudia Kemp; Jolanda Vermeulen; Remco H.S. Westerink; Flemming R. Cassee
Inhalation exposure to environmental and occupational aerosol contaminants is associated with many respiratory health problems. To realistically mimic long-term inhalation exposure for toxicity testing, lung epithelial cells need to maintained and exposed under air-liquid interface (ALI) conditions for a prolonged period of time. In addition, to study cellular responses to aerosol particles, lung epithelial
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Application of the “Rock'n’Roll” (RNR) resuspension model with non-zero slip velocities on particle and substrate surfaces J. Aerosol Sci. (IF 2.649) Pub Date : 2020-09-25 Dongchi Yu; Fei Hu
Studies on the flow-induced particle resuspension have great significance for engineering applications of many areas, and several established resuspension models have been developed for the analysis of particle resuspension in an atmospheric environment. However, for flow with a non-negligible particle Knudsen number (the ratio between the mean free path of gas and the particle radius), which is commonly
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An experimentally validated model of diffusion charging of arbitrary shaped aerosol particles J. Aerosol Sci. (IF 2.649) Pub Date : 2020-09-25 Li Li; Ranganathan Gopalakrishnan
Particle shape strongly influences the diffusion charging of aerosol particles exposed to bipolar/unipolar ions and accurate modeling is needed to predict the charge distribution of non-spherical particles. A prior particle-ion collision kernel βi model including Coulombic and image potential interactions for spherical particles is generalized for arbitrary shapes following a scaling approach that
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A data-driven approach for characterizing community scale air pollution exposure disparities in inland Southern California J. Aerosol Sci. (IF 2.649) Pub Date : 2020-10-28 Khanh Do; Haofei Yu; Jasmin Velasquez; Marilyn Grell-Brisk; Heather Smith; Cesunica E. Ivey
In 2017, Assembly Bill 617 was approved in state of California, which mandated the allocation of resources for addressing air pollutant exposure disparities in underserved communities across the state. The bill stipulated the implementation of community scale monitoring and the development of local emissions reductions plans. We aimed to develop a streamlined, robust, and accessible PM2.5 exposure
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Applicability of benchtop multi-wavelength polar photometers to off-line measurements of the Multi-Angle Absorption Photometer (MAAP) samples J. Aerosol Sci. (IF 2.649) Pub Date : 2020-10-22 Sara Valentini; Vera Bernardoni; Ezio Bolzacchini; Davide Ciniglia; Luca Ferrero; Alice Corina Forello; Dario Massabó; Marco Pandolfi; Paolo Prati; Francesca Soldan; Gianluigi Valli; Jesús Yus-Díez; Andrés Alastuey; Roberta Vecchi
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Technical note: Using k-means to identify soot aggregates in transmission electron microscopy images J. Aerosol Sci. (IF 2.649) Pub Date : 2020-10-20 T.A. Sipkens; S.N. Rogak
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Impact of the competition between aggregation and surface growth on the morphology of soot particles formed in an ethylene laminar premixed flame J. Aerosol Sci. (IF 2.649) Pub Date : 2020-10-20 José Morán; Alexandre Poux; Jérôme Yon
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Regional deposition of the allergens and micro-aerosols in the healthy human nasal airways J. Aerosol Sci. (IF 2.649) Pub Date : 2020-10-19 Mohammad Hazeri; Mohammad Faramarzi; Sasan Sadrizadeh; Goodarz Ahmadi; Omid Abouali
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Measurement of the porosity of a pseudo-spherical nanostructured particle deposit formed by filtration J. Aerosol Sci. (IF 2.649) Pub Date : 2020-10-08 Jonathan Nuvoli; Soleiman Bourrous; François-Xavier Ouf; Dominique Thomas
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Breath-, air- and surface-borne SARS-CoV-2 in hospitals J. Aerosol Sci. (IF 2.649) Pub Date : 2020-10-15 Lian Zhou; Maosheng Yao; Xiang Zhang; Bicheng Hu; Xinyue Li; Haoxuan Chen; Lu Zhang; Yun Liu; Meng Du; Bochao Sun; Yunyu Jiang; Kai Zhou; Jie Hong; Na Yu; Zhen Ding; Yan Xu; Min Hu; Lidia Morawska; Yuanhang Zhang
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Evaluation of white-box versus black-box machine learning models in estimating ambient black carbon concentration J. Aerosol Sci. (IF 2.649) Pub Date : 2020-10-15 Pak L. Fung; Martha A. Zaidan; Hilkka Timonen; Jarkko V. Niemi; Anu Kousa; Joel Kuula; Krista Luoma; Sasu Tarkoma; Tuukka Petäjä; Markku Kulmala; Tareq Hussein
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High-efficiency dry powder aerosol delivery to children: Review and application of new technologies J. Aerosol Sci. (IF 2.649) Pub Date : 2020-10-14 Karl Bass; Dale Farkas; Amr Hassan; Serena Bonasera; Michael Hindle; Worth Longest
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In Vitro to ex Vivo/In Vivo Correlation (IVIVC) of dissolution kinetics from inhaled particulate solutes using air/blood barrier models: Relation between in vitro design, lung physiology and kinetic output of models J. Aerosol Sci. (IF 2.649) Pub Date : 2020-10-11 Per Gerde; Maria Malmlöf; Ewa Selg
Correlating data from in vitro dissolution testing of inhaled particulate pharmaceuticals or air pollutants with the dissolution and distribution to the blood circulation of the same aerosols following inhalation in vivo is a major challenge. Better methods could benefit both inhaled drug development and the risk assessment of air pollutants. Five properties known to influence the results produced
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Improvement of aerosol spray scavenging efficiency with water mist J. Aerosol Sci. (IF 2.649) Pub Date : 2020-10-13 Hui Liang; Qian Zhou; Nejdet Erkan; Shunichi Suzuki
The resolidified fuel debris from the damaged Fukushima Daiichi reactors must be cut into small pieces prior to removing it from reactor buildings. Submicron radioactive aerosol particles are likely to be generated and dispersed into the primary containment vessel (PCV) atmosphere during this cutting process. However, traditional sprays cannot effectively scavenge aerosol particles with diameters in
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Measuring electrostatic charge on pneumatically generated spray drops J. Aerosol Sci. (IF 2.649) Pub Date : 2020-10-09 Mei W. Tessum; Peter C. Raynor
Activities such as the suppression of coal dust would benefit from an improved understanding about how the presence of surfactant alters the charge distribution of spray drops. However, there is no standard method to measure charge and size distributions of nozzle-generated spray drops. To fill this gap, a new spray drop charge measurement system was developed to measure a broad range of sizes and
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Numerical and experimental investigation on the performance of a ventilated chamber for low-cost PM sensor calibration J. Aerosol Sci. (IF 2.649) Pub Date : 2020-10-07 Huang Zhang; Renhui Ruan; Shruti Choudhary; Houzhang Tan; Pratim Biswas
Particulate matter (PM) sensors are popular for distributed monitoring due to their portability, low-cost and networking capabilities. To provide reliable data, these sensors have to be calibrated periodically in the laboratory. This is often done in chambers with several of them co-located, alongside several research grade instruments. It is important to confirm that the aerosol is well distributed
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Tutorial: Understanding the transport, deposition, and translocation of particles in human respiratory systems using Computational Fluid-Particle Dynamics and Physiologically Based Toxicokinetic models J. Aerosol Sci. (IF 2.649) Pub Date : 2020-10-01 Yu Feng; Jianan Zhao; Hamideh Hayati; Ted Sperry; Hang Yi
Dynamic modeling of how particulate matter (PM) transport, deposit, and translocate from human respiratory systems to systemic regions subject to indoor and outdoor exposures are essential for case-specific lung dosimetry predictions and occupational health risk assessments. Because of the invasive nature and imaging resolution limitations of existing in vitro and in vivo methods, Computational Fluid-Particle
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The size-mobility relationship of ions, aerosols, and other charged particle matter. J. Aerosol Sci. (IF 2.649) Pub Date : 2020-10-01 Carlos Larriba-Andaluz; Francesco Carbone
Electrical Mobility is arguably the property upon which some of the most successful classification criteria are based for aerosol particles and ions in the gas phase. Once the value of mobility is empirically obtained, it can be related to a geometrical descriptor of the charged entity through a size-mobility relationship. Given the multiscale range of sizes in the aerosol field, approaches that can
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Characterization of mesoscale inhomogeneity in nonwovens and its relevance in the filtration of fine mists J. Aerosol Sci. (IF 2.649) Pub Date : 2020-09-19 T. Penner; J. Meyer; A. Dittler
Structural properties in nonwoven materials, such as porosity and layer thickness, are typically spatially distributed on a micro- and mesoscale. The mesoscale inhomogeneity is visually perceived, inter alia, as the cloudiness of the nonwoven fabric or as inclusions in the bulk material. Differential box counting, which is a fractal based image analysis method, was used to assess the inhomogeneity
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Dynamics of aerosol generation and release – Dry powder inhaler performance considerations J. Aerosol Sci. (IF 2.649) Pub Date : 2020-09-19 Agata Dorosz; Marta Żaczek; Arkadiusz Moskal
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