Organic aerosols. Medical search. Frequent questions

In contrast to primary organic aerosols, which are emitted directly from the biosphere, secondary organic aerosols are either formed via homogeneous nucleation through the successive oxidation of gas-phase organic compounds, or through condensation on pre-existing particles. (wikipedia.org)
Over Boreal regions, monoterpenes emitted from the forest are the main precursors for secondary organic aerosol (SOA) formation and the primary driver of the growth of new aerosol particles to climatically important cloud condensation nuclei (CCN). (nature.com)
Atmospheric aerosol particles affect Earth's radiation balance by scattering and absorbing solar radiation as well as by acting as cloud condensation nuclei (CCN) and thereby alter the optical properties and lifetime of clouds. (nature.com)
In order for an organic vapour to contribute to the initial growth of new particles it needs to be an extremely low-volatility organic compound (ELVOC) or be very reactive at the particle surface or in the condensed phase 4 , 5 , 6 . (nature.com)
Secondary Organic Aerosols (SOA) are suspended particles formed in the atmosphere through the oxidation of emitted Volatile Organic Compounds (VOC). (aiche.org)
SOA make up a significant portion of ambient aerosol particles and therefore have an important impact on climate and human health. (aiche.org)
A Scanning Mobility Particle Sizer (SMPS) spectrometer consisting of a Differential Mobility Analyzer (DMA) and Condensation Particle Counter (CPC) was used to determine the concentration and particle size distribution of ambient aerosol particles in the size range of 10-300 nm. (aiche.org)
Plain Language Summary Atmospheric aerosol particles play an important role in affecting the climate by interacting with radiation and water. (nasa.gov)
In this work, we identify and characterize the processes that control the aerosol population, their physicochemical properties, and the growth of particles in the vertical profile of the boundary layer. (usp.br)
The analysis of the occurrence of aerosol particles growth was focused on particles from 10 to 50 nm, with measurements between February 2014 and September 2020. (usp.br)
Fluorescence is a troublesome side effect in laboratory Raman studies on sulfuric acid solutions and aerosol particles. (uni-bielefeld.de)
Further, we find that these aqSOA particles are poor depositional ice nuclei, in contrast to previous studies on simple mixtures of glassy organics. (sandiego.edu)
This monograph provides a unique and comprehensive coverage of the nature and atmospheric role of carbonaceous aerosol particles, these big unknowns of the global atmosphere. (nhbs.com)
A third method sometimes used for estimating carbon in submicron combustion aerosols, is to measure particle size distributions using a scanning mobility particle sizer (SMPS) and calculate mass using the assumptions that the particles are spherical, carbonaceous and of known density. (cdc.gov)
The gasses and particles emitted by land plants, marine and freshwater algae, and other organisms strongly influence the composition, radiative properties, and health effects of atmospheric aerosols on local, regional, and global scales. (aaar.org)
Secondary organic aerosols (SOA) make up a substantial fraction of ambient fine PM and play a role in the proinflammatory effects of the particles. (gatech.edu)
3. In vitro genotoxicity of PAH mixtures and organic extract from urban air particles part II: human cell lines. (nih.gov)
4. In vitro genotoxicity of PAH mixtures and organic extract from urban air particles part I: acellular assay. (nih.gov)
6. Biological activities of organic compounds adsorbed onto ambient air particles: comparison between the cities of Teplice and Prague during the summer and winter seasons 2000-2001. (nih.gov)
7. Sensitivity of different endpoints for in vitro measurement of genotoxicity of extractable organic matter associated with ambient airborne particles (PM10). (nih.gov)
E-cigarettes include a battery that turns the device on, a heating element that heats the e-liquid and turns it into an aerosol of tiny particles (sometimes called a "vapor"), a cartridge or tank that holds the e-liquid, and a mouthpiece or opening used to inhale the aerosol. (cancer.org)
But in fact, e-cigarettes produce an aerosol made up of tiny particles, which is different from a vapor. (cancer.org)

Secondary Organic Aerosol Formation from Low-NOx Photooxidation of Dodecane: Evolution of Multigeneration Gas-Phase Chemistry and Aerosol Composition" (PDF). (wikipedia.org)
The results provide a detailed overview of the WSOC partitioning behavior in the summertime in an urban region dominated by biogenic emissions, and indicate that secondary organic aerosol formation involving partitioning to liquid water may be a significant aerosol formation route that is generally not considered. (duke.edu)

Pathogenic Mechanisms of Secondary Organic Aerosols. (nih.gov)

Furthermore, other carbonaceous aerosols (black carbon and primary organic aerosol) in CAM6 become closer to CAM-chem results due to more similar microphysical aging timescales influenced by SOA coating, which in turn leads to comparable wet deposition fluxes. (copernicus.org)
Deposition and accumulation of light-absorbing carbonaceous aerosol on glacier surfaces can alter the energy balance of glaciers. (org.in)
Biomass burning (BB) is the main global source of primary carbonaceous aerosol and the second largest global source of non-methane organic compounds, including volatile and semi-volatile organic compounds that are now understood to be a major contributor to secondary particle formation in the atmosphere. (noaa.gov)
Even the concept of carbonaceous aerosol has just recently grown out of atmospheric pollution studies, without ever being anchored to solidified nomenclature and terminology. (nhbs.com)
Thus atmospheric chemists, physicists, meteorologists, and modellers may well find this monograph a thought-inspiring and sometimes provocative overview of all global phenomena affected by or related to carbonaceous aerosol. (nhbs.com)
An anticipated advantage of this monograph is that it brings together these diverse atmospheric phenomena under the umbrella of carbonaceous aerosol in an interdisciplinary way, which is a prerequisite of resolving global scientific issues. (nhbs.com)
2. Methods of Observation of Carbonaceous Aerosol. (nhbs.com)
5. Properties of Carbonaceous Aerosol and their Role in the Global Atmosphere. (nhbs.com)

The site is also part of the SouthEastern Aerosol Research and Characterization (SEARCH) network. (aiche.org)
We report spatially resolved DBC quantity and radiocarbon (Δ 14 C) measurements, paired with molecular-level characterization of dissolved organic matter from the Amazon River and tributaries during low discharge. (nature.com)
Characterization of worker exposures to methylene chloride resulting from application of aerosol glue in the asbestos abatement industry. (cdc.gov)

Atmospheric oxidation of volatile organic compounds (VOCs) and subsequent reactions can produce low-volatility species which contribute to secondary organic aerosols (SOAs). (nii.ac.jp)
In this study, we investigated the SOA formation pathways in urban Beijing for the period of November 7-8, 2014, using an observation-constrained box model in which the multigenerational oxidation processes of volatile organic compounds (VOCs) and intermediate VOCs (IVOCs) and the chemical aging of semi-volatile primary organic aerosols (POAs) were taken into account. (aaqr.org)
The objective of this dissertation was to develop spectrophotometric methods for functional group analysis of secondary organic aerosol (SOA) and to apply these in conjunction with other methods to studies of the aerosol products formed by oxidation of volatile organic compounds and oxidative aging in model reaction systems representative of the atmosphere. (escholarship.org)
There is a 40 % reduction in the number and relative abundance of distinct particle-phase nitrogen-containing organic compounds (NOC) detected by high resolution mass spectrometry. (copernicus.org)
The reduction in the amount of organic nitrates in the particle phase has implications for understanding the budget of NOC compounds. (copernicus.org)
Measurements of biogenic volatile organic compounds (BVOC) at low altitudes over these subtropical forests were made during the African Monsoon Multidisciplinary Analysis (AMMA) field experiment during July and August 2006 mainly above Benin, Nigeria and Niger. (uea.ac.uk)
TVOC, total volatile organic compounds. (cdc.gov)
The proposed research aims to elucidate the speciated chemical composition and transformations of intermediate to low-volatility organic compounds emitted from BB. (noaa.gov)
Through powerful chemical separation and identification techniques and by obtaining unprecedented hourly time resolution for chemically speciated measurements of oxygenated intermediate and semi-volatile organic compounds and particle phase organic compounds during FIREX, we expect to make substantial progress in understanding the formation and transformation of wildfire impacts on aerosol loadings in the atmosphere. (noaa.gov)
Here, polar organic marker compounds in urban background aerosols from Mumbai were measured using gas chromatography-mass spectrometry. (mcmaster.ca)
These findings indicate the potential of performing organic source apportionment on the basis of total particle mass, rather than on the basis of organic tracer compounds that contribute a small fraction of this mass. (nasa.gov)
Anthropogenic secondary organic aerosol (ASOA), formed from anthropogenic emissions of organic compounds, constitutes a substantial fraction of the mass of submicron aerosol in populated areas around the world and contributes to poor air quality and premature mortality. (manchester.ac.uk)
We show that the production of ASOA in 11 urban areas on three continents is strongly correlated with the reactivity of specific anthropogenic volatile organic compounds. (manchester.ac.uk)
The differences in ASOA production across different cities can be explained by differences in the emissions of aromatics and intermediate- and semi-volatile organic compounds, indicating the importance of controlling these ASOA precursors. (manchester.ac.uk)
Afterwards, the investigators toured the IKI facility, observed the de-icer filling line, and collected area air samples in the filling room and the water bath room for volatile organic compounds. (cdc.gov)

Additionally, a High-Resolution Time-of-Flight Aerosol Mass Spectrometer (HR-ToF-AMS) was used to determine the chemical composition of sub-micron non-refractory aerosol. (aiche.org)
In Chapters 3 and 4 the functional group analysis methods were used with methods for organic nitrate and peroxide analysis to investigate the chemical composition of SOA formed from OH radical-initiated reactions of n-pentadecane (a model alkane) in the presence of NOx (Chapter 3) and in the absence of NOx (Chapter 4), conditions typical of polluted and clean air. (escholarship.org)
This study reports on the performance of the CV for analyzing organic aerosol (OA) elemental composition and source apportionment, using both HR-ToF-AMS and ACSM for the first time. (nasa.gov)
The effect of relative humidity (RH) on the composition and concentrations of gas-phase products and secondary organic aerosol (SOA) generated from the photooxidation of isoprene under high-NO x conditions was investigated. (copernicus.org)
Measured changes in physical properties and chemical composition suggest substantial and rapid chemical aging of BB organic aerosol. (noaa.gov)
While research into the specific trace gases emitted using comprehensive techniques has begun, much work remains especially in the area of characterizing the chemical composition of the semi-volatile and particulate phase of BB organic emissions and their secondary products. (noaa.gov)
In spite of numerous studies carried out to characterize the chemical composition of laboratory analogues of Titan aerosols (tholins), their molecular composition as well as their structuration are still little known. (hal.science)
Measurements of particle number size distribution, scattering, and radiation absorption were used and the chemical composition of aerosols, together with remote sensing data. (usp.br)
The aerosol chemical composition is mainly dominated by the organic fraction, with 80 % of the mass of PM1. (usp.br)
1989. Factors influencing the composition of the organic fraction of diesel particulates. (cdc.gov)
Seasonal variation in aerosol composition and concentration upon transport from the outdoor to indoor environment. (nih.gov)
Since outdoor aerosols vary over short (diurnal) and long (seasonal) timescales, we examined how the variation in outdoor aerosol concentration and composition impact indoor aerosol. (nih.gov)
Measurements of both indoor and outdoor aerosol composition in real time in an urban classroom in winter and summer seasons were performed using an aerosol mass spectrometer (AMS), aethalometer, and a suite of gas phase instruments. (nih.gov)

Secondary organic aerosol (SOA) accounts for a substantial fraction of ambient tropospheric aerosol (Hallquist et al. (copernicus.org)
Organic aerosols (OA) represent a significant fraction of total submicron particulate matter (PM1) concentrations globally, including densely populated megacities such as Seoul. (nasa.gov)
Plain Language Summary We compare four different modeling approaches for simulating secondary organic aerosol (SOA) formation, accounting for a significant fraction of total fine particulate matter concentrations in Seoul, Korea. (nasa.gov)
The fraction of boundary layer submicron aerosol that was organic aerosol (OA) was about a factor of 2 smaller than during a 2011 summertime study in a similar region. (unh.edu)
The annual export of DBC is large (27 Tg/year), and represents a significant fraction (i.e., ~10%) of overall riverine dissolved organic carbon (DOC) 9 . (nature.com)
However, we have limited knowledge of the optical properties of atmospheric organic aerosols, which make up a large fraction of sub-micrometer aerosol particle mass. (nasa.gov)
This study characterizes the partitioning behavior of a significant fraction of the ambient organic aerosol through simultaneous measurements of gas and particle water-soluble organic carbon (WSOC). (duke.edu)

Riverine dissolved organic carbon (DOC) contains charcoal byproducts, termed black carbon (BC). (nature.com)
Another common method of measuring carbon in aerosols is the aethalometer, which uses light extinction to measure "black carbon" or BC, which is considered to approximate EC. (cdc.gov)
With an eye toward evaluating the use of these methods for measuring carbon in freshly emitted diesel aerosols, the objective of this paper is to compare the results among these methods and to investigate the role of OC when measuring the mass concentration of elemental carbon (or black carbon) in aerosols emitted by a medium-duty Diesel engine. (cdc.gov)
Particulate organic matter refers to all (primary and secondary) particulate organic matter aerosol, expect for black carbon. (esipfed.org)

Journal of Aerosol Science 20(8):1373-1376. (cdc.gov)

Since ammonia emissions are expected to increase due to growing population and changing climate, we conducted an ambient field study to better understand the formation of organic aerosols in ammonia-rich environments. (aiche.org)
MEGAN: Model of Emissions of Gases and Aerosols from Nature (Guenther et al. (met.no)
An aerosol mass spectrometer was flown on the National Science Foundation/National Center for Atmospheric Research C‐130 during the Wintertime INvestigation of Transport, Emissions, and Reactivity (WINTER) 2015 campaign in the northeast United States. (unh.edu)
We show that the physical characteristics of aerosols at heights of 60 and 325 m are different, with those closest to the canopy being dominated by biogenic emissions and those at 325 m being more processed and influenced by long-range transport. (usp.br)
Integrating these tools and datasets to improve our understanding of atmospheric aerosol emissions, transport, transformation, and their impact on air quality and climate remains a major challenge. (aaar.org)
However, the precursor sources of ASOA are poorly understood, and there are large uncertainties in the health benefits that might accrue from reducing anthropogenic organic emissions. (manchester.ac.uk)

Autoxidation of monoterpenes leads to rapid formation of Highly Oxygenated organic Molecules (HOM). (nature.com)
During the spring, HOM SOA formation increases the CCN concentration by ~10 % and causes a direct aerosol radiative forcing of −0.10 W/m 2 . (nature.com)
In this study, reaction probabilities for elementary steps were determined and new chemical mechanisms of SOA formation were proposed based on gas- and aerosol-phase analysis of reaction products. (nii.ac.jp)
The diverse physical and chemical properties of organic aerosols and the varied pathways involved in their formation and aging form the basis of this uncertainty, preventing extensive and accurate representation within regional and global scale models. (manchester.ac.uk)
2009). Atmospheric models generally use parameterizations to simulate SOA because it is composed of a wide range of different organic molecules (Goldstein and Galbally, 2007) and due to limited knowledge of SOA formation in the atmosphere (Nault et al. (copernicus.org)
However, scientific understanding of the atmospheric formation and removal processes of OA, especially for secondary organic aerosols (SOA), is still highly uncertain. (nasa.gov)
DNA adduct formation in mammalian cells by extractable organic matter. (nih.gov)

Most intensive field studies investigating aerosols have been conducted in summer, and thus, wintertime aerosol sources and chemistry are comparatively poorly understood. (unh.edu)

A one-dimensional radiative-transfer calculation of the top-of-the-atmosphere albedo was applied to model an atmosphere containing a 3 km thick layer of aerosol comprising pure water, pure insoluble organic aerosol, or an aerosol consisting of an aqueous core with an insoluble organic shell. (nerc.ac.uk)
This inability to constrain the radiative forcings produced by organic aerosols within the atmosphere consequently acts as a limitation to the wider objective of providing reliable projections of future climate. (manchester.ac.uk)
Here we develop a new simple secondary organic aerosol (SOA) scheme in the Community Atmosphere Model (CAM) version 6.3, the atmospheric component of the CESM. (copernicus.org)
The model suggests𝐴𝐴 that 𝐴𝐴589nm -values of organic aerosols may vary within a relatively small range for typical O:C and H:C values observed in the atmosphere. (nasa.gov)
The ubiquity of organic substances in the atmosphere, their relatively high abundance, and the insensitivity of the fluorescence with respect to their concentrations will render most acidic natural aerosols subject to absorption and fluorescence, possibly influencing climate forcing. (uni-bielefeld.de)
Secondary particulate organic matter aerosol refers to particulate organic matter formed within the atmosphere from gaseous pre-cursors. (esipfed.org)
Scientists find the lifetime of organic aerosols in the upper atmosphere is on the order of 10 days, far shorter than scientists previously assumed. (agu.org)

This special symposium invites presentations on integrating measurement networks, models, and satellites spanning different spatial (local, regional, and global) and temporal (minutes, hours, daily, monthly) scales to better understand physical and chemical processes regulating distribution and abundance of atmospheric aerosols and guiding the next generation of aerosol research and applications. (aaar.org)

The main purpose of this simplified SOA scheme is to reduce the differences in aerosol concentrations and radiative fluxes between CAM and CAM with detailed chemistry (CAM-chem) while maintaining the computational efficiency of CAM. (copernicus.org)
A new technique has been developed to deconvolve and quantify the mass concentrations of hydrocarbon-like and oxygenated organic aerosols (HOA and OOA) using highly time-resolved organic mass spectra obtained with an Aerodyne Aerosol Mass Spectrometer (AMS). (nasa.gov)
The reconstructed organic concentrations (= HOA + OOA) agree well with the measured values (r2 = 0.997, slope = 0.998), and the reconstructed organic data matrix (size = 3199 time steps × 300 m/z's) explains 99% of the variance in the measured time series. (nasa.gov)

The observed reduction in the extent of condensation-type oligomerization at high RH may have substantial impact on the phase characteristics and hygroscopicity of the isoprene aerosol. (copernicus.org)
In contrast our own calculations based on aerosol yields from isoprene and monoterpenes during chamber studies under represent the OM measured in this region on a comparable scale to the under representations of OM by predictive models in the mid latitudes. (uea.ac.uk)
Furthermore, our study suggests that monoterpene- and sesquiterpene-derived secondary organic carbon (SOC) were more significant than those of isoprene- and toluene-SOC at Mumbai. (mcmaster.ca)

Optical trapping combined with Mie spectroscopy is a new technique used to record the refractive index of insoluble organic material extracted from atmospheric aerosol samples over a wide wavelength range. (nerc.ac.uk)
The refractive index of the insoluble organic extracts was shown to follow a Cauchy equation between 460 and 700 nm for organic aerosol extracts collected from urban (London) and remote (Antarctica) locations. (nerc.ac.uk)
The refractive index of absorbing aerosol was also recorded. (nerc.ac.uk)
Typical values of the Cauchy coefficient for the woodsmoke aerosol extract were A = 1.541 ± 0.03 and B = 14 800 ± 2900 nm2, resulting in a real refractive index of 1.584 ± 0.007 at a wavelength of 589 nm and an absorption Ångström exponent of 8.0. (nerc.ac.uk)
Accurate estimates of aerosol refractive index (RI) are critical for modeling aerosol-radiation interaction, yet this information is limited for ambient organic aerosols, leading to large uncertainties in estimating aerosol radiative effects. (nasa.gov)

Chow, Albert H.L. / Water activity of mixed organic and inorganic aerosols . (edu.sa)

This is presented for 102 volatile organic chemicals (VOCs) of industrial importance. (nih.gov)

SOAs represent a significant proportion of aerosols contained in the troposphere. (wikipedia.org)

Impacts of aerosol-driven changes in the quantity and properties of light on ecosystem health and productivity. (aaar.org)

An article describing a method for quantifying airborne organic carbon (OC) and elemental carbon (EC) within aerosolized diesel particulate matter (DPM). (cdc.gov)
8. Kinetics of ROS generation induced by polycyclic aromatic hydrocarbons and organic extracts from ambient air particulate matter in model human lung cell lines. (nih.gov)
13. The processes associated with lipid peroxidation in human embryonic lung fibroblasts, treated with polycyclic aromatic hydrocarbons and organic extract from particulate matter. (nih.gov)

9. An acellular assay to assess the genotoxicity of complex mixtures of organic pollutants bound on size segregated aerosol. (nih.gov)

Biogenic secondary organic aerosols (SOA) are generally considered to be more abundant in summer than in winter. (mcmaster.ca)

Development, evaluation and comparison of two independent sampling and analytical methods for ortho-phthalaldehyde vapors and condensation aerosols in air. (cdc.gov)

After sufficient oxidation, the vapor pressure is sufficiently low that the gas-phase compound partitions into the solid-phase, producing secondary organic matter (the particle phase of secondary organic aerosol). (wikipedia.org)
Personal air samples were collected during a removal operation using both organic vapor monitors and standard charcoal tubes, with gas chromatography as the analytical method. (cdc.gov)
What is in the aerosol ("vapor") of an e-cigarette? (cancer.org)
Although the term "vapor" may sound harmless, the aerosol that comes out of an e-cigarette is not water vapor and can be harmful. (cancer.org)

A collection efficiency (CE) ∼ 1 in the CV AMS/ACSM has been demonstrated for ambient aerosols, but the CV also leads to increased thermal decomposition of the analytes because of longer residence time and vaporizer surface contact. (nasa.gov)

The absorption Ångström exponent was determined for woodsmoke and humic acid aerosol extract. (nerc.ac.uk)
We show that, while fluorescence may in the future become a valuable tool of aerosol diagnostics, the concurrent absorption is too small to significantly affect the atmosphere's radiative balance. (uni-bielefeld.de)

The Community Earth System Model (CESM) community has been providing versatile modeling options, with simple to complex chemistry and aerosol schemes in a single model, in order to support the broad scientific community with various research interests. (copernicus.org)
4. Organic Chemistry of Aerosol. (nhbs.com)
Return to Start page for Atmospheric Chemistry and Aerosol Names PLEASE DO NOT USE THE NAVIGATION BAR ON THE LEFT HAND SIDE! (esipfed.org)

While heavy rains are an important contributor to aerosol removal during the monsoon season, meteorological data (relative humidity and T) suggest no heavy rains occurred during our sampling period. (mcmaster.ca)

Since sulfate is non-volatile, we report a sulfate-normalized indoor-outdoor ratio (I/O)i/SO4 for measured aerosol i components, allowing us to estimate aerosol component-based effects of seasonal and other variations in ventilation and HVAC operation, indoor emission sources, and chemically-based loss processes between outdoor and indoor environments. (nih.gov)

These experiments have aimed to improve the limited understanding of the processes involved in the evolution of biomass burning organic aerosol (BBOA) and contribute towards the development of more robust parameterisations for climate and chemical transport models. (manchester.ac.uk)
Aerosols play an important role in climate change processes. (org.in)
It was observed that 72 % of aerosol particle transport events occur first at 325 m, which is expected for processes dominated by convective downward currents. (usp.br)

Global long-range transport and lung cancer risk from polycyclic aromatic hydrocarbons shielded by coatings of organic aerosol. (oregonstate.edu)

In this study, we have explored the phase behavior and the ice nucleation properties of secondary organic aerosol made from aqueous processing (aqSOA). (sandiego.edu)

Organic aerosols are determinants of the aerosol scattering coefficient. (usp.br)

The model predictions suggest that the RI of typical ambient organic aerosols may have relatively small changes, which supports a simplified representation of using a constant n-value for ambient OA in atmospheric models. (nasa.gov)

The lower fluxes of microbes, non-Trp aerosols, non-sea-salt Ca and dust onto WAIS Divide ice than onto Greenland ice may be due to the smaller areas of their source regions and less favorable wind patterns for transport onto Antarctic ice than onto Greenland ice. (copernicus.org)

Aerosol mass concentration was found to be relatively constant with slight diurnal variation. (aiche.org)

This paper presents measurements of organic aerosols above subtropicalWest Africa during the wet season using data from the UK Facility for Airborne Atmospheric Measurements (FAAM) aircraft. (uea.ac.uk)

We present a semi-empirical model that predicts the real RI n of organic aerosol material from its widely measured oxygen-to-carbon (O:C) and hydrogen-to-carbon (H:C) elemental ratios. (nasa.gov)
Combustion aerosols consist mainly of elemental and organic carbon (EC and OC). (cdc.gov)

Apparent differences in aerosol physical properties between 60 and 325 m in height were observed for scat,525nm, and aerosol volume. (usp.br)
However, in winter, high levels of SOA and their day/night differences suggest significant contributions of continental aerosols through long-range transport together with local sources. (mcmaster.ca)

The SMPS data were compared to AMS data to determine the chemical species present during episodes of high aerosol loading and growth events. (aiche.org)
To reduce the quantification uncertainty of commercial aerosol mass spectrometers (AMS) and aerosol chemical speciation monitors (ACSM), a new capture vaporizer (CV) was recently built to replace the standard vaporizer (SV). (nasa.gov)
Once these air masses are photochemically aged for hours to days, detailed chemical analyses including a full suite of organic aerosol source and product markers are needed to understand mass closure between modeled and measured organic aerosol. (noaa.gov)
We invite abstracts on any research across the full range of physical, chemical, and biological interactions between aerosols and ecosystems. (aaar.org)

At the same time, the presence of aerosols in an environment and their deposition to surfaces can alter the health, growth, and function of the ecosystem as well as the sequestration of carbon dioxide into the terrestrial biosphere and ocean. (aaar.org)

Heterogeneous Ice Nucleation on Simulated Secondary Organic Aerosol" by Gregory P. Schill, David O. De Haan et al. (sandiego.edu)
and Tolbert, Margaret A., "Heterogeneous Ice Nucleation on Simulated Secondary Organic Aerosol" (2014). (sandiego.edu)

Anatomy3

Organisms2

Diseases6

Chemicals and Drugs38

Analytical, Diagnostic and Therapeutic Techniques and Equipment21

Phenomena and Processes15

Disciplines and Occupations6

Technology, Industry, Agriculture9

Information Science2

Health Care16

Particles22

Secondary Organic Aerosol Formation2

Mechanisms of secondary organic aerosols1

Carbonaceous8

Characterization3

Compounds15

Composition13

Fraction7

Black carbon4

Journal of Aerosol Science1

Emissions6

Formation7

Wintertime1

Atmosphere7

ATMOSPHERIC AEROSOLS1

Concentrations3

Isoprene3

Refractive index5

Inorganic1

VOCs1

SOAs1

Impacts1

Particulate matter3

Pollutants1

Biogenic1

Condensation1

Vapor4

Demonstrated for ambient1

Absorption2

Chemistry3

Meteorological1

Emission1

Processes3

Polycyclic aromatic hyd1

Aqueous1

Coefficient1

Ambient organic1

Fluxes1

Mass concentration1

Measurements of organic1

Elemental2

Differences2

Chemical4

Deposition1

Nucleation2