• An Aerodyne Aerosol Mass Spectrometer (AMS) was deployed to the CENICA Supersite in Mexico City during the Mexico City Metropolitan Area (MCMA-2003) field study from March 29-May 4, 2003. (cdc.gov)
  • CMAQ also simulates the transport and removal of directly emitted particles which are speciated as elemental carbon, crustal material, nitrate, sulfate, and organic aerosols. (esipfed.org)
  • Our investigations demonstrate that the increased inorganic fraction in the aerosol particles is a key component in the frequently occurring haze days during the study period, and particularly the reduction of nitrate, sulfate and their precursor gases would contribute towards better visibility in China. (copernicus.org)
  • The heated section completely removed sulfate from the aerosols except for sodium sulfate and related compounds in sea salt particles. (nasa.gov)
  • Biomass burning particles were more likely to survive heating than other mixed sulfate-organic particles. (nasa.gov)
  • ACD scientist Jim Smith and postdoc Mike Lawler study the composition of small, recently formed particles in the atmosphere in order to understand what chemical compounds are responsible for particle growth. (ucar.edu)
  • Knowing what conditions and compounds are necessary for particles to grow is a step towards estimating how important nucleation is for cloud formation. (ucar.edu)
  • In May 2011 the TDCIMS was deployed at Mace Head, Ireland, a remote coastal station (Fig. 1), alongside other instruments measuring the physical and chemical properties of ambient aerosol (a term meaning particles suspended in the air). (ucar.edu)
  • Some evidence suggests that there is a large component of mixed sulfate-organic aerosol in this size range, implying that the particles were nucleated and grown from gas phase sulfuric acid and organic compounds. (ucar.edu)
  • A big eruption in the tropics cools much of the planet by throwing volcanic gases high into the atmosphere, where they change into microscopic particles known as aerosols and spread around the globe, reflecting incoming sunlight. (nasa.gov)
  • Additional water from the volcano speeds up the change of sulfur dioxide gas into sulfate aerosols and also helps the aerosol particles grow bigger more quickly. (nasa.gov)
  • The size of the aerosols is important because larger particles cause more warming than cooling. (nasa.gov)
  • The zeppelin has been loaded with heavy equipment, specially designed to absorb and analyse aerosols, tiny chemical particles that float in the atmosphere. (euronews.com)
  • The team will collect samples over various landscapes and environments, analysing aerosol particles of differing sizes and properties at several altitudes, pressures and temperatures. (euronews.com)
  • In all cases, changes in the aerosol spectra were due to both the uptake of HNO 3 , HCl, NH 3 and SO 2 from the gas phase, (the SO 2 being oxidised to sulphate) and the repartitioning of species such as HNO 3 , HCl, and NH 3 from larger particles onto smaller ones. (lu.se)
  • Measurements of upwind and interstitial aerosol distributions showed that the smallest particles activated were 30 and 50 nm for clean and polluted cases respectively, slightly smaller than the model values quoted above. (lu.se)
  • From this modelling study, it can be concluded that in general, in the remote environment the exchange of hydrochloric acid, nitric acid and ammonia between aerosol particles and take up from the gas phase in the vicinity of cloud may be a very important mechanism in regulating the evolution of the aerosol spectrum. (lu.se)
  • Aerosols are formed by the conversion of gases to particles, the disintegration of liquids or solids, or the resuspension of powdered material. (chemistrysources.com)
  • Aerosol formation from a gas results in much finer particles than disintegration processes ( except when condensation takes place directly on existing large particles). (chemistrysources.com)
  • Aerosol particles range in size from molecular clusters on the order of 1 nanometer to 100 micrometers. (chemistrysources.com)
  • The effects of the atmospheric aerosol are largely determined by the size and chemical composition of the individual particles and their morphology (shape or fractal character). (chemistrysources.com)
  • Aerosol processes are used routinely in the manufacture of fine particles. (chemistrysources.com)
  • OH-driven renewal of low-volatility products may extend atmospheric lifetimes of IEPOX-SOA particles by slowing production of low-molecular weight, high-volatility organic fragments, and likely contributes to large quantities of 2-methyltetrols and methyltetrol sulfates reported in PM2.5. (nsf.gov)
  • Through the vertical profiles of aerosol properties, we noticed a considerable number of NPF events (7 out of 38) in the upper BL, where the newly formed particles continue to grow as they are mixed down to the surface. (copernicus.org)
  • Oxalic acid and sulfate salts are major components of aerosol particles. (sandiego.edu)
  • Rapid brown carbon formation is seen with aqueous aerosol particles at >80% relative humidity (RH). (sandiego.edu)
  • Brown carbon formation slows at 50-60% RH and when the aerosol particles are acidified with sulfuric acid but stops entirely only under dry conditions. (sandiego.edu)
  • The sorption of di-(2-ethyhexyl) phthalate (DEHP) on laboratory generated ammonium sulfate particles and indoor air particles was investigated by passing the particles through a 1.2 L chamber equipped with polyvinyl chloride (PVC) flooring. (lu.se)
  • A higher sorption of DEHP to indoor particles, with a higher organic mass fraction, was measured compared to laboratory generated ammonium sulfate particles. (lu.se)
  • CMAQ, which is a publically available, peer-reviewed, state-of-the-science model, consists of a number of science attributes that are critical for simulating the oxidant precursors and non-linear organic and inorganic chemical relationships associated with the formation of ozone and sulfate, nitrate, and organic aerosols. (esipfed.org)
  • Dry deposition from Sahara sources regions of western Africa containing compounds such as sulphate, nitrate, or radioactive substances has been studied worldwide over the last 30 years, and there remains a discrepancy between both measurement results and model predictions. (hindawi.com)
  • A two-year record of filter pack measurements illustrates the chemical climatology of nitric acid, sulfur dioxide, ammonia and major aerosol components (particulate nitrate, sulfate and ammonium) at a high alpine site (Mt. Sonnblick, 3106 m a.s.l. (sonnblick.net)
  • Annual averages (standard deviations are given in parenthesis) were 4(6) nmol m -3 for nitric acid, 8(11) nmol m -3 for ammonia, 6(14) nmol m -3 for sulfur dioxide, 4(9) nmol m -3 for particulate nitrate, 15(19) nmol m -3 for particulate sulfate and 23(35) nmol m -3 for particulate ammonium. (sonnblick.net)
  • Based on monthly averages summer to winter concentration ratios were 13, 7 and 10 for aerosol nitrate, sulfate and ammonium, and 3 and 5 for nitric acid and ammonia, respectively. (sonnblick.net)
  • Nitric acid was more abundant than aerosol nitrate and amounted to 61% of both compounds. (sonnblick.net)
  • The main inorganic species were ammonium sulfate and ammonium nitrate, with a smaller contribution of ammonium chloride. (cdc.gov)
  • Specifically, many days started with rapid nitrate and SOA formation and deposition onto the aerosol. (cdc.gov)
  • The nitrate to sulfate ratio tended to increase with increasing temperature as well. (sagepub.com)
  • The different patterns were identified as the dominant driver of the larger nitrate to sulfate ratios measured at higher concentrations of fine particulate matter. (sagepub.com)
  • The goal is to convert sulfur oxides and nitrogen oxides to ammonium sulfate and nitrate that can be sold as a fertilizer. (chemistrysources.com)
  • The study incorporates disciplines such as Chemical composition, Nitrate and Analytical chemistry in addition to Aerosol. (research.com)
  • Given the ubiquitous existence of chloride, nitrate, and acidic aerosols, we propose that nitrate photolysis is a significant daytime chlorine source globally. (nature.com)
  • We propose that nitrate photolysis at high aerosol acidity is an important pathway for activating inert chloride to produce photoliable Cl 2 during daytime in the polluted troposphere. (nature.com)
  • This project was a study on sources and transport of sulfur compounds in the atmosphere. (ucar.edu)
  • The project obtained concentrations of dimethyl sulfide (DMS), a biogenic precursor gas of sulfate aerosol in the marine atmosphere. (ucar.edu)
  • These measurements (1) are linked to the compounds' metabolism by these ocean organisms and (2) carry implications for tracking dimethylsulfide emissions from the ocean to the atmosphere. (wattsupwiththat.com)
  • I think this will ultimately be very important for using isotopes to trace the cycling of these compounds in the surface oceans as well as the flux of dimethylsulfide to the atmosphere. (wattsupwiththat.com)
  • The CFCs are synthetic compounds developed and released into the atmosphere by humankind. (nationalacademies.org)
  • Strong eruptions shoot a complex stew of gases into the atmosphere: sulfur compounds, water vapor, halogens, carbon compounds and others. (nasa.gov)
  • Atmospheric chemists have learned a great deal about the chemical reactions these gases and aerosols trigger in the atmosphere - and the climate consequences. (nasa.gov)
  • 2021), Chemical transport models often underestimate inorganic aerosol acidity in remote regions of the atmosphere , Commun Earth Environ, 2 , doi:10.1038/s43247-021-00164-0. (nasa.gov)
  • Concentration of sulphur species (element or compounds) in any phase of the atmosphere. (nerc.ac.uk)
  • We know that aerosols affect cloud formation and by doing so they can contribute to the cooling of the atmosphere. (euronews.com)
  • The scientists are particularly interested in what they call "the detergent of the atmosphere", a natural chemical compound that triggers the degradation of pollutants and improves air quality. (euronews.com)
  • The atmospheric aerosol consists of material emitted directly from sources (primary component) and material formed by gas-to-particle conversion in the atmosphere (sec-ondary component). (chemistrysources.com)
  • Both aerosol direct and indirect effects are affected by the vertical distribution of aerosols in the atmosphere, which is further influenced by a range of processes, such as aerosol dynamics, long-range transport, and entrainment. (copernicus.org)
  • The results imply that the interaction between organic and sulfuric acids promotes efficient formation of organic and sulfate aerosols in the polluted atmosphere because of emissions from burning of fossil fuels, which strongly affect human health and global climate. (tamu.edu)
  • chemical compounds, both natural 1 and anthropogenic, are removed in hours, days, or weeks, and do not accumulate in significant concentrations. (nationalacademies.org)
  • The AMS provided real-time information on mass concentrations of chemical species in/on submicron aerosols, as well as on chemically resolved size distributions, with 4-minute time resolution. (cdc.gov)
  • Satellite observation of aerosol precursors of NO 2 and SO 2 showed increased concentrations during the study period. (copernicus.org)
  • 1993. Chronic respiratory disease associated with long term ambient concentrations of sulfates and other air pollutauts. (cdc.gov)
  • During the study period, traffic restrictions due to COVID-19 led to lower concentrations of PM1 and carbonaceous compounds than expected. (bvsalud.org)
  • Here we investigate the rates, product branching ratios, and stereochemistry of organosulfates from reactions of dilute IEPOX (5-10 mM) under a range of sulfate concentrations (0.3-50 mM) and pH values (1.83-3.38) in order to better understand the fate of IEPOX in clouds and fogs. (nsf.gov)
  • The aerosol concentrations at the surface are the highest due to strong sources of emission at ground level. (copernicus.org)
  • Considering that we spend approximately 90% of our time indoors, it is important to gain increased understanding of indoor aerosol concentrations and properties. (lu.se)
  • Combivent® Inhalation Aerosol is a combination of ipratropium bromide and albuterol sulfate. (theodora.com)
  • Combivent Inhalation Aerosol contains a microcrystalline suspension of ipratropium bromide and albuterol sulfate in a pressurized metered-dose aerosol unit for oral inhalation administration. (theodora.com)
  • Combivent (ipratropium bromide and albuterol sulfate ) is an inhaler that is a combination of an anticholinergic bronchodilator and a selective beta2-adrenergic bronchodilator used to treat and prevent symptoms ( wheezing and shortness of breath) caused by ongoing lung disease ( chronic obstructive pulmonary disease - COPD which includes bronchitis and emphysema ). (rxlist.com)
  • Also, safety and efficacy of extra doses of ipratropium or albuterol in addition to the recommended doses of Combivent® (ipratropium bromide and albuterol sulfate) Inhalation Aerosol have not been studied. (rxlist.com)
  • they probably affect the biochemical behavior and nucleating properties of aerosols. (chemistrysources.com)
  • The physicochemical properties of aerosols impact the health effects. (lu.se)
  • Combivent Inhalation Aerosol is a combination of the anticholinergic bronchodilator, ipratropium bromide, and the beta 2 -adrenergic bronchodilator, albuterol sulfate. (theodora.com)
  • The dose of Combivent Inhalation Aerosol is two inhalations four times a day. (rxlist.com)
  • COMBIVENT Inhalation Aerosol is indicated for use in patients with chronic obstructive pulmonary disease (COPD) on a regular aerosol bronchodilator who continue to have evidence of bronchospasm and who require a second bronchodilator. (rxlist.com)
  • Safety and efficacy of additional doses of COMBIVENT Inhalation Aerosol beyond 12 puffs/24 hours have not been studied. (rxlist.com)
  • Adverse health effects have stimulated many controlled studies of aerosol inhalation by humans and animals. (chemistrysources.com)
  • VX) act primarily through skin penetration and by inhalation of aerosol. (who.int)
  • and inhalation of infective aerosols. (cdc.gov)
  • Sulfur Cycle Model - An investigation of the effect of sulfate aerosols on the climate. (wikipedia.org)
  • The scenarios assume a 1% per year compound increase in greenhouse gases and changes in sulfate (SO 4 ) aerosols based on the Intergovernmental Panel on Climate Change (IPCC) IS92a scenario. (usgs.gov)
  • Atmospheric aerosols significantly affect the earth's radiation balance by absorbing and scattering solar radiation, leading to a decrease in atmospheric visibility and contributing to climate change. (aaqr.org)
  • Dimethylsulfide emissions play a role in climate regulation through transformation to aerosols that are thought to influence the earth's radiation balance," says Oduro, who conducted the research while completing a Ph.D. in geology & earth system sciences at Maryland and now is a postdoctoral fellow at the Massachusetts Institute of Technology. (wattsupwiththat.com)
  • Jurgita is responsible for the Aerosol Mass Spectrometry measurements at Mace Head and her main area of expertise is in the application of aerosol mass spectrometry techniques to elucidating the production, nature, dispersion and impacts of aerosol on climate and air quality. (universityofgalway.ie)
  • What other emissions are contributing factors to climate change (e.g., aerosols, CO, black carbon soot), and what is their relative contribution to climate change? (nationalacademies.org)
  • This study presents the first observation of an important intermediate in the oxidation of DMS, a compound naturally emitted from the oceans that produces sulfate aerosols, which in turn affect cloud formation and climate. (csic.es)
  • Hence the importance of including this mechanism in atmospheric models, to improve representation of key linkages between the biogeochemistry of the ocean, marine aerosol formation and growth, and their combined effects on climate. (csic.es)
  • So by reducing sulphate-aerosols we run the risk of suppressing an effect which actually works against climate warming. (euronews.com)
  • Most radiative transfer schemes in climate models treat organic aerosol, a major subset of atmospheric aerosols that comprise 20 %-90 % of the total particulate mass (Kanakidou et al. (copernicus.org)
  • Atmospheric aerosols influence climate di-rectly and indirectly. (chemistrysources.com)
  • However, many observations of these processes are based on ground measurements, limiting our ability to understand the vertical distribution of aerosols and simulate their impact on clouds and climate. (copernicus.org)
  • Even when PM1 emissions were reduced, high emissions of pollutants that have a strong impact on health and climate may be emitted, for example polycyclic aromatic compounds (PAHs) and refractory black carbon (rBC). (lu.se)
  • In aqueous aerosols, the acid-catalyzed ring-opening of IEPOX followed by nucleophilic addition of inorganic sulfate or water forms organosulfates and 2-methyltetrols, respectively, contributing substantially to secondary organic aerosol (SOA). (nsf.gov)
  • Here, we explore the potential for their respective precursor species, glyoxal and SO 2 , to form atmospheric brown carbon via aqueous-phase reactions in a series of bulk aqueous and flow chamber aerosol experiments. (sandiego.edu)
  • At the same time, SO2 is an important precursor of aerosols. (euronews.com)
  • The model incorporates gas phase chemistry of sulphur and nitrogen compounds upstream of the cloud, and the interaction of aerosol, precursor trace gases and oxidants within the cloud. (lu.se)
  • Aerosol size distributions made at the site showed evidence for what researchers had previously termed 'open ocean nucleation' events, during which there were large increases in particle number at small sizes, around 10-70 nm (Fig. 2). (ucar.edu)
  • A major research area in atmospheric chemistry focuses on the formation of secondary organic aerosol (SOA), which contains a large variety of low-volatility organic compounds when generated by the ozonolysis of monoterpenes. (aaqr.org)
  • The low-volatility organic compounds potentially arising from the ozonolysis of citral, including aldehydes (-C(=O)H), ketones (-C(=O)-), alcohols (-OH), and hydroperoxides (-OOH), can form SOA through the nucleation, condensation, and/or partitioning of the condensed and gaseous phases. (aaqr.org)
  • Sulfur, the tenth most abundant element in the universe, is part of many inorganic and organic compounds. (wattsupwiththat.com)
  • Atmospheric aerosols often contain a substantial fraction of organic matter, but the role of organic compounds in new nanometer-sized particle formation is highly uncertain. (tamu.edu)
  • The experiment will model sulfur in a number of compound forms including dimethyl sulfide and sulfate aerosols. (wikipedia.org)
  • These measurements reveal differences in the isotope ratios of these two sulfur compounds that are produced by macroalga and phytoplankton. (wattsupwiththat.com)
  • 2019), ATom: L2 Measurements from CU High-Resolution Aerosol Mass Spectrometer (HR-AMS) , Ornl Daac , doi:10.3334/ORNLDAAC/1716. (nasa.gov)
  • Fast size-resolved aerosol composition measurements in Mexico City with an AMS. (cdc.gov)
  • 2019), ATom: L2 In Situ Measurements of Aerosol Microphysical Properties (AMP) , Ornl Daac , doi:10.3334/ORNLDAAC/1671. (nasa.gov)
  • Dibb, J. (2019), ATom: Measurements of Soluble Acidic Gases and Aerosols (SAGA) , Ornl Daac , doi:10.3334/ORNLDAAC/1748. (nasa.gov)
  • Gas phase and aerosol inputs to the model have been provided from measurements made in the field. (lu.se)
  • Further, the much more linear relationship between cloud droplet and accumulation mode aerosol number, which was observed in the measurements made during the ACE-2 HILLCLOUD project is supported by these modelling results. (lu.se)
  • Aerosol mass spectrometry (AMS) was applied for real time measurements of the aerosol chemical composition and concentration throughout the measurements included in the thesis. (lu.se)
  • The introduction of this new oxidation mechanism in global atmospheric models shows the implications of these observations, with reductions of up to 50% and 30% in sulfur dioxide and sulfate levels respectively. (csic.es)
  • 1973. Atmospheric sulfur dioxide and sulfate: Distribution of concentration at urban and nonurban sites in United States. (cdc.gov)
  • Intense secondary aerosol formation was observed most days, which is consistent with the high levels of aerosol precursors, radiation, and of radicals (OH, HO2) measured by other researchers at the site. (cdc.gov)
  • Aerosol reaction engineering refers to the design of such processes, with the goal of relat-ing product properties to the properties of the aerosol precursors and the process conditions. (chemistrysources.com)
  • He, Kebin 2021-05-30 00:00:00 Formation of secondary inorganic aerosol (SIA) was investigated during a six-month long heating season in Harbin, China. (sagepub.com)
  • Aerosols of sulfuric acid and other sulfates make up 5- 20% of total suspended particulate matter in urban air. (soilworks.com)
  • Acid-driven multiphase chemistry of isoprene epoxydiols (IEPOX) with inorganic sulfate aerosols contributes substantially to formation of secondary organic aerosol (SOA), which constitutes a large mass fraction of atmospheric fine particulate matter (PM2.5). (nsf.gov)
  • Typically, higher inorganic mass fractions lead to increased aerosol water uptake and light-scattering ability in elevated relative humidity. (copernicus.org)
  • The aerosol size distribution was often bimodal (in Dva), with a smaller mode centered around 100 nm (characteristic of traffic emissions) and a larger accumulation mode around 400-600 nm. (cdc.gov)
  • The combined AMS and SMPS data reveal two main sources of ultra fine aerosol in the city: sulfate-dominated new particle formation, and traffic emissions. (cdc.gov)
  • Natural sources of atmospheric vanadium include continental dust, marine aerosol, and volcanic emissions. (cdc.gov)
  • Aerosol emissions from stressed burning of five types of candles of different wax and wick compositions were studied. (lu.se)
  • Candle emissions from stressed burning were dominated by BC emissions, with minor contributions from inorganic and organic aerosol emissions. (lu.se)
  • The emissions of particle phase PAHs, BC, and organic aerosol showed strong correlations at the stressed burning of candles, and may be used as proxies for each other. (lu.se)
  • There is evidence that the stratospheric aerosol is significant in ozone destruction. (chemistrysources.com)
  • Particulate ammonium and particulate sulfate are the predominant forms compared to gaseous ammonia and sulfur dioxide. (sonnblick.net)
  • One of the early predictions of this hypothesis was that there should be a sulfur compound made by organisms in the oceans that was stable enough against oxidation in water to allow its transfer to the air. (wattsupwiththat.com)
  • Either the sulfur compound itself, or its atmospheric oxidation product, would have to return sulfur from the sea to the land surfaces. (wattsupwiththat.com)
  • Atmospheric oxidation of isoprene yields large quantities of highly water-soluble isoprene epoxydiols (IEPOX) that partition into fogs, clouds, and wet aerosols. (nsf.gov)
  • What Harry did in this research was to devise a way to isolate and measure the sulfur isotopic composition of these two sulfur compounds," says Farquhar, a professor in the University of Maryland's department of geology. (wattsupwiththat.com)
  • Our in situ measurement of aerosol chemical composition in Beijing also confirmed increased contribution of inorganic aerosol fraction as a function of the increased particle pollution level. (copernicus.org)
  • The Particle Analysis by Laser Mass Spectrometry (PALMS) single particle mass spectrometer was used to analyze the composition of the nonvolatile fraction of atmospheric aerosol in a number of different environments. (nasa.gov)
  • The chemical composition of the atmospheric aerosol can be used to resolve its sources, natural or anthropogenic, by a method based on chemical sig-natures. (chemistrysources.com)
  • However, the composition of the aerosols remained similar, with organics and sulfates representing 59.8 ± 2.2 % and 22.7 ± 2.1 % of the total mass in the BL. (copernicus.org)
  • His primary scientific interests are in Aerosol, Mass spectrometry, Environmental chemistry, Chemical composition and Organic chemistry. (research.com)
  • In respect to ammonium and sulfate aerosol samples are slightly acidic during most of the year. (sonnblick.net)
  • The concentration of aerosols below 30 nm in the boundary layer (BL) (e.g., below 1000 m) during spring is higher than that during summer, a result of the stronger new particle formation (NPF) events and a reduced condensation sink in spring. (copernicus.org)
  • The variations are more pronounced for aerosol components than for gases. (sonnblick.net)
  • aerosol reactors are operated using high-energy electron beams to irradiate flue gases from fossil fuel combustion. (chemistrysources.com)
  • Outdoor PM 2.5 mass is primarily composed of inorganic ions, carbonaceous compounds (black and organic carbon, including secondary organic aerosol), and mineral dust. (nature.com)
  • a synthetic quaternary ammonium compound chemically related to atropine. (theodora.com)
  • Albuterol sulfate, chemically known as (1,3-benzenedimethanol, (alpha)'-[[(1,1-dimethylethyl) amino] methyl]-4-hydroxy, sulfate (2:1)(salt), (±)- is a relatively selective beta 2 -adrenergic bronchodilator. (theodora.com)
  • Ipratropium bromide is an anticholinergic bronchodilator chemically described as 8-azoniabicyclo[3.2.1] octane, 3-(3-hydroxy-1-oxo-2-phenylpropoxy)-8-methyl8-(1-methylethyl)-, bromide monohydrate, (3-endo, 8-syn)-: a synthetic quaternary ammonium compound chemically related to atropine . (rxlist.com)
  • Contributions to the atmospheric aerosol come from both natural and anthropogenic sources. (chemistrysources.com)
  • Effects of the atmospheric aerosol on human health have led to the establishment of ambient air-quality standards by the United States and other industrialized nations. (chemistrysources.com)
  • The interaction between water vapor and aerosol nanoparticles is important in atmospheric processes. (copernicus.org)
  • The non-refractory submicron aerosol mass (approximately PM 1.0) at the CENICA Supersite was comprised of about 2/3 organic carbon and 1/3 inorganic species. (cdc.gov)
  • this conference) was applied to estimate the fraction of the organic aerosol that is combustion origin (approximately 1/3 of organic mass) vs. oxygenated (approximately 2/3). (cdc.gov)
  • Jülich Institute chemist, Florian Rubach showed euronews an aerosol mass spectrometer on the airship. (euronews.com)
  • His primary areas of study are Aerosol, Aerosol mass spectrometry, Environmental chemistry, Mass spectrometry and Electron ionization. (research.com)
  • His primary areas of investigation include Aerosol, Environmental chemistry, Mass spectrometry, Environmental science and Particulates. (research.com)
  • His studies deal with areas such as Sesquiterpene, Aerosol mass spectrometry, Fourier transform ion cyclotron resonance and Sulfate aerosol as well as Monoterpene. (research.com)
  • PCB methyl sulphones and related compounds: Identification of target cells and tissues in different species. (cdc.gov)
  • The results presented in this thesis highlight the importance of detailed physicochemical characterization of indoor aerosols, and the need for a more complete evaluation of their impact on human health. (lu.se)
  • So before we can understand what humans are doing to contribute to higher aerosol loadings, we also have to really understand the biogenic sources. (euronews.com)
  • Production and use of nickel and its compounds can, however, result in additional exposures to humans and the environment. (mdpi.com)
  • Cobalt(II,III) oxide, cobalt(II) sulfide, other cobalt(II) compounds, and pentavalent antimony were each evaluated as not classifiable as to its carcinogenicity to humans (Group 3) . (who.int)
  • A case study day for secondary aerosol formation (April 9th, 2003) will be presented. (cdc.gov)
  • There is an instrument from our Swiss partner that measures the absorption of water in aerosols, a crucial element in cloud formation," said Dr Mentel. (euronews.com)
  • This high level of sensitivity enables future studies to explore the major processes responsible for formation and degradation of brown carbon aerosols. (copernicus.org)
  • Enhanced sulfate formation was observed at high relative humidity (RH), with the same threshold RH (80%) for both colder and warmer measurement periods. (sagepub.com)
  • Therefore, the sulfate formation was considered inefficient in this study. (sagepub.com)
  • Atmospheric photosensitization: a new pathway for sulfate formation. (sagepub.com)
  • Currently available laboratory techniques aim to simulate atmospheric aerosol aging and measure the evolving light absorption, but they suffer from low sensitivity and precision. (copernicus.org)
  • Research is focused on studying synergetic aerosol chemistry, physics and cloud processes. (universityofgalway.ie)
  • To better quantify their radiative forcing due to aerosol-radiation interactions, we need to improve process-level understanding of aging processes, which lead to either "browning" or "bleaching" of organic aerosols. (copernicus.org)
  • Atmospheric DMS is oxidized to condensable products that form secondary aerosols that affect the Earth's radiative balance by scattering solar radiation and serving as cloud condensation nuclei. (csic.es)
  • Albuterol sulfate is a white to off-white crystalline powder, soluble in water and slightly soluble in ethanol. (theodora.com)
  • Copper (II) sulfate is highly soluble in water. (imtqy.com)
  • We sought to test the potential of phospholipid vesicles to improve the patient compliance and efficacy of this drug for the treatment of leishmaniasis by means of aerosol therapy. (ibecbarcelona.eu)
  • Some pentavalent antimony compounds are used to treat leishmaniasis. (who.int)
  • 2013). Recently, it has been shown that including BrC absorption properties in radiative transfer models leads to a stronger wavelength dependency of light absorption by aerosols and to significant changes in the overall effective radiative forcing from aerosol-radiation interactions (ERFari) (Feng et al. (copernicus.org)
  • Harry's work establishes that we should expect to see variability in the sulfur isotope signatures of these compounds in the oceans under different environmental conditions and for different organisms. (wattsupwiththat.com)