{"id":623,"date":"2015-11-03T15:53:11","date_gmt":"2015-11-03T20:53:11","guid":{"rendered":"https:\/\/test.eng.ufl.edu\/faculty-site\/?page_id=7"},"modified":"2026-02-16T10:39:05","modified_gmt":"2026-02-16T15:39:05","slug":"research","status":"publish","type":"page","link":"https:\/\/faculty.eng.ufl.edu\/myoseon-jang\/research\/","title":{"rendered":"Research"},"content":{"rendered":"\n<div class=\"wp-block-create-block-accordion-block\"><section class=\"accordion-section mb-5\"><div class=\"container-fluid\"><div class=\"row-fluid\"><div class=\"accordion openFirst\" id=\"parent3c07a629-97b1-42a5-96cc-5d4419d7eff1\">\n<div class=\"wp-block-create-block-accordion-block-inner\"><div class=\"accordion-item\"><span class=\"accordion-header\" id=\"headingd33b83c1-8627-456e-9d4b-89e7c64d2e84\"><button class=\"accordion-button collapsed\" type=\"button\" data-bs-toggle=\"collapse\" data-bs-target=\"#collapsed33b83c1-8627-456e-9d4b-89e7c64d2e84\" aria-expanded=\"false\" aria-controls=\"d33b83c1-8627-456e-9d4b-89e7c64d2e84\">CAMx-UNIPAR air quality simulation<\/button><\/span><div id=\"collapsed33b83c1-8627-456e-9d4b-89e7c64d2e84\" class=\"accordion-collapse collapse\" aria-labelledby=\"headingd33b83c1-8627-456e-9d4b-89e7c64d2e84\"><div class=\"accordion-body\"><div class=\"accordion-body-wrap\">\n<p>UNIPAR has been coupled with the Comprehensive Air Quality Model with Extensions (CAMx) air quality model, which largely improved the prediction of SOA mass in three different regions: East Asia (KORUS-AQ in 2016); Central Valley, California (the National Chemical Speciation Monitoring Network in 2018 provided by the Bay Area Air Quality Management District [BAAQMD]), and the Southern U.S. (2022 Air Data from the U.S. EPA). The implement of heterogeneous chemistry in aqueous phase in CAMx=UNIAPR significantly improve the analysis of impacts of humidity and NOx levels on SOA formation.\u00a0<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-587\" src=\"https:\/\/faculty.eng.ufl.edu\/myoseon-jang\/wp-content\/uploads\/sites\/761\/2024\/11\/CAMx-UNIPAR-3-areas-scaled-1-300x158.jpg\" alt=\"\" width=\"300\" height=\"158\" srcset=\"https:\/\/faculty.eng.ufl.edu\/myoseon-jang\/wp-content\/uploads\/sites\/761\/2024\/11\/CAMx-UNIPAR-3-areas-scaled-1-300x158.jpg 300w, https:\/\/faculty.eng.ufl.edu\/myoseon-jang\/wp-content\/uploads\/sites\/761\/2024\/11\/CAMx-UNIPAR-3-areas-scaled-1-1024x540.jpg 1024w, https:\/\/faculty.eng.ufl.edu\/myoseon-jang\/wp-content\/uploads\/sites\/761\/2024\/11\/CAMx-UNIPAR-3-areas-scaled-1-768x405.jpg 768w, https:\/\/faculty.eng.ufl.edu\/myoseon-jang\/wp-content\/uploads\/sites\/761\/2024\/11\/CAMx-UNIPAR-3-areas-scaled-1-1536x810.jpg 1536w, https:\/\/faculty.eng.ufl.edu\/myoseon-jang\/wp-content\/uploads\/sites\/761\/2024\/11\/CAMx-UNIPAR-3-areas-scaled-1-2048x1080.jpg 2048w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/p>\n<\/div><div class=\"accordion-btn-wrap\"><\/div><\/div><\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-create-block-accordion-block-inner\"><div class=\"accordion-item\"><span class=\"accordion-header\" id=\"heading7bcf661f-82d0-435c-b4c4-5d401e354eb3\"><button class=\"accordion-button collapsed\" type=\"button\" data-bs-toggle=\"collapse\" data-bs-target=\"#collapse7bcf661f-82d0-435c-b4c4-5d401e354eb3\" aria-expanded=\"false\" aria-controls=\"7bcf661f-82d0-435c-b4c4-5d401e354eb3\">Harmful Algal Aerosol<\/button><\/span><div id=\"collapse7bcf661f-82d0-435c-b4c4-5d401e354eb3\" class=\"accordion-collapse collapse\" aria-labelledby=\"heading7bcf661f-82d0-435c-b4c4-5d401e354eb3\"><div class=\"accordion-body\"><div class=\"accordion-body-wrap\">\n<p><strong>Harmful algal blooms (HABs)<\/strong>\u00a0are a major health problem around the World. \u00a0Reports of HABs have drastically increased over the past 50 years as a result of warmer climate conditions and increased pollution, coastal development, and other factors.<\/p>\n<p><strong>Algal aerosol from red tide breaks\u00a0<\/strong><\/p>\n<p><em>Karenia (K.) brevis<\/em>\u00a0is a dinoflagellate indigenous to the waters of the Gulf of Mexico and the Caribbean. Its blooms recur in native regions and multiply to neighboring coastlines.\u00a0<em>K. brevis<\/em>\u00a0is the photosynthetic organism primarily responsible for harmful algae blooms known as \u201cred tide\u201d and produces a harmful toxin, known as brevetoxin (BTx).\u00a0 Scientists report Florida\u2019s sequential hits from Hurricanes Helene and Milton are fueling the outbreak of toxic algae blooms that appeared before the Hurricanes slammed the Gulf coast.<\/p>\n<p><strong>Algal aerosol from cyanobacterial blooms in fresh water and estuaries\u00a0<\/strong><\/p>\n<p>Several strains of \u00a0blue-green algae, or cyanobacteria produce HABs in freshwater systems across the U.S. .Cyanobacterial algae produce toxins, such as Microcystin-LR (<strong>MC-LR<\/strong>), that can make animals and people sick. These toxins are classically associated with acute liver and renal toxicity following ingestion which can lead to mortality of people and aquatic organisms,<\/p>\n<p><strong>Impacts of algal aerosol on respiratory health<\/strong><\/p>\n<p>Algae toxins are aerosolized with sea spray aerosol (SSA) or fresh-water spray aerosol.\u00a0 Algal aerosol and toxins can be carried inland by winds. One of the major organ systems targeted by algal aerosol and toxins\u00a0 is the respiratory system. For example, studies suggest that coastal residents may experience higher rates of respiratory diagnoses during red tide periods compared to non-red tide periods.<\/p>\n<p><strong>Studies at UF Atmospheric Chemistry Lab.<\/strong><\/p>\n<ul>\n<li>Atmospheric processes of algal toxins<\/li>\n<li>Exposure of in vitro respiratory cells to algal aerosol and toxins via Collaboratory works with public health department\u00a0<\/li>\n<li>Oxidative potentials of algal aerosol collected at fields or chamber simulations\u00a0<\/li>\n<li>Development of the Harmful Algal Aerosol Reaction (HAAR) model to simulation the oxidative degradation of algal toxins<\/li>\n<li>Enrichment of algal toxins in sea spray aerosol or lake spray aerosol<\/li>\n<\/ul>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-591\" src=\"https:\/\/faculty.eng.ufl.edu\/myoseon-jang\/wp-content\/uploads\/sites\/761\/2024\/11\/green-algae-1-scaled-1-300x225.jpg\" alt=\"\" width=\"300\" height=\"225\" srcset=\"https:\/\/faculty.eng.ufl.edu\/myoseon-jang\/wp-content\/uploads\/sites\/761\/2024\/11\/green-algae-1-scaled-1-300x225.jpg 300w, https:\/\/faculty.eng.ufl.edu\/myoseon-jang\/wp-content\/uploads\/sites\/761\/2024\/11\/green-algae-1-scaled-1-1024x768.jpg 1024w, https:\/\/faculty.eng.ufl.edu\/myoseon-jang\/wp-content\/uploads\/sites\/761\/2024\/11\/green-algae-1-scaled-1-768x576.jpg 768w, https:\/\/faculty.eng.ufl.edu\/myoseon-jang\/wp-content\/uploads\/sites\/761\/2024\/11\/green-algae-1-scaled-1-1536x1152.jpg 1536w, https:\/\/faculty.eng.ufl.edu\/myoseon-jang\/wp-content\/uploads\/sites\/761\/2024\/11\/green-algae-1-scaled-1-2048x1536.jpg 2048w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-589\" src=\"https:\/\/faculty.eng.ufl.edu\/myoseon-jang\/wp-content\/uploads\/sites\/761\/2024\/11\/red-tide-1-scaled-1-300x225.jpg\" alt=\"\" width=\"300\" height=\"225\" srcset=\"https:\/\/faculty.eng.ufl.edu\/myoseon-jang\/wp-content\/uploads\/sites\/761\/2024\/11\/red-tide-1-scaled-1-300x225.jpg 300w, https:\/\/faculty.eng.ufl.edu\/myoseon-jang\/wp-content\/uploads\/sites\/761\/2024\/11\/red-tide-1-scaled-1-1024x768.jpg 1024w, https:\/\/faculty.eng.ufl.edu\/myoseon-jang\/wp-content\/uploads\/sites\/761\/2024\/11\/red-tide-1-scaled-1-768x576.jpg 768w, https:\/\/faculty.eng.ufl.edu\/myoseon-jang\/wp-content\/uploads\/sites\/761\/2024\/11\/red-tide-1-scaled-1-1536x1152.jpg 1536w, https:\/\/faculty.eng.ufl.edu\/myoseon-jang\/wp-content\/uploads\/sites\/761\/2024\/11\/red-tide-1-scaled-1-2048x1536.jpg 2048w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/p>\n<\/div><div class=\"accordion-btn-wrap\"><\/div><\/div><\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-create-block-accordion-block-inner\"><div class=\"accordion-item\"><span class=\"accordion-header\" id=\"heading5caabcce-0ef2-49aa-bfb4-b43c01f6f14a\"><button class=\"accordion-button collapsed\" type=\"button\" data-bs-toggle=\"collapse\" data-bs-target=\"#collapse5caabcce-0ef2-49aa-bfb4-b43c01f6f14a\" aria-expanded=\"false\" aria-controls=\"5caabcce-0ef2-49aa-bfb4-b43c01f6f14a\">Secondary Organic Aerosol<\/button><\/span><div id=\"collapse5caabcce-0ef2-49aa-bfb4-b43c01f6f14a\" class=\"accordion-collapse collapse\" aria-labelledby=\"heading5caabcce-0ef2-49aa-bfb4-b43c01f6f14a\"><div class=\"accordion-body\"><div class=\"accordion-body-wrap\">\n<h4 class=\"wp-block-heading\">What are the secondary organic aerosol (SOA)?<\/h4>\n<p>As a class, secondary organic aerosols (SOA) are air pollutants formed through complex interaction of sunlight, volatile organic compounds emitted from trees, plants, automobiles, industries and other airborne chemical species (i.e., NO<sub>x<\/sub>\u00a0and SO<sub>2<\/sub>). SOA is a major constituents of the fine particulate matter (PM<sub>2.5<\/sub>), which has been known to cause the adverse effects on pulmonary health and climate.<\/p>\n<h4 class=\"wp-block-heading\">What is our laboratory doing?<\/h4>\n<p>SOA is under investigation in a multidisciplinary approach to understand how SOA contribute to airborne fine particulate matter, the possible public health and atmospheric effects. Our research team is studying SOA to answer questions below:<\/p>\n<ul>\n<li>What are the most common precursor of SOAs in the tropospheric atmosphere?<\/li>\n<li>What are the mechanisms of the formation of SOAs in the atmosphere?<\/li>\n<li>What is their chemical composition?<\/li>\n<li>What are the fate of the SOAs as they travel through the atmosphere?<\/li>\n<li>What are their health effects?<\/li>\n<li>What are their effects on climate forcing?<\/li>\n<\/ul>\n<p>\u00a0<\/p>\n<\/div><div class=\"accordion-btn-wrap\"><\/div><\/div><\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-create-block-accordion-block-inner\"><div class=\"accordion-item\"><span class=\"accordion-header\" id=\"heading4933cac8-a069-4c3b-a750-b6e6ac70135e\"><button class=\"accordion-button collapsed\" type=\"button\" data-bs-toggle=\"collapse\" data-bs-target=\"#collapse4933cac8-a069-4c3b-a750-b6e6ac70135e\" aria-expanded=\"false\" aria-controls=\"4933cac8-a069-4c3b-a750-b6e6ac70135e\">Chamber studies<\/button><\/span><div id=\"collapse4933cac8-a069-4c3b-a750-b6e6ac70135e\" class=\"accordion-collapse collapse\" aria-labelledby=\"heading4933cac8-a069-4c3b-a750-b6e6ac70135e\"><div class=\"accordion-body\"><div class=\"accordion-body-wrap\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\">\n<h4 class=\"wp-block-heading\">UF-APHOR chamber<\/h4>\n<p>The Atmospheric PHotochemical Outdoor Reactor (UF-APHOR) is a state of the art science facility which uses natural sunlight to enable more precise replication of atmospheric chemistry. The UF-APHOR is located on the top of Black Hall (29.64185\u00b0 N, \u201382.347883\u00b0 W) at the University Florida. The large chamber volume (52 m<sup>3<\/sup>\u00a0+ 52 m<sup>3<\/sup>) provides enough air to sample for multiple analyses and the dual chambers allow for two simultaneously controlled experiments to be performed under the same meteorological conditions. The gaseous compounds and aerosols generated in the chamber are directly carried to various analytical instruments in the Atmospheric Chemistry Laboratory for the characterization of oxidation products using spectroscopic, thermal, and chromatographic methods. The resulting chamber data have been applied to the discovery of new chemistry in aerosol and development of aerosol models.<\/p>\n<h4 class=\"wp-block-heading\">Indoor Reactors<\/h4>\n<p>Two 2.0 m<sup>3\u00a0<\/sup>indoor Teflon film reactors are housed in the Atmospheric Chemistry Laboratory. Indoor chambers are used to conduct humidity controlled chamber experiments at constant temperature. The reactors were specially designed to be compressible to half their volume (i.e., into 1 m<sup>3<\/sup>) without dilution due to sampling and analyses. The indoor chamber is used to test analytical methods prior to scale up to the experiment using UF-APHOR or field sampling.<\/p>\n<figure id=\"attachment_328\" aria-describedby=\"caption-attachment-328\" style=\"width: 233px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-328\" src=\"https:\/\/faculty.eng.ufl.edu\/myoseon-jang\/wp-content\/uploads\/sites\/761\/2020\/11\/chmaber-310x399-1-233x300.jpg\" alt=\"Black Hall, outdoor chambers, and indoor chamber\" width=\"233\" height=\"300\" srcset=\"https:\/\/faculty.eng.ufl.edu\/myoseon-jang\/wp-content\/uploads\/sites\/761\/2020\/11\/chmaber-310x399-1-233x300.jpg 233w, https:\/\/faculty.eng.ufl.edu\/myoseon-jang\/wp-content\/uploads\/sites\/761\/2020\/11\/chmaber-310x399-1.jpg 310w\" sizes=\"auto, (max-width: 233px) 100vw, 233px\" \/><figcaption id=\"caption-attachment-328\" class=\"wp-caption-text\">Chamber facility<\/figcaption><\/figure>\n<\/div>\n<\/div><div class=\"accordion-btn-wrap\"><\/div><\/div><\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-create-block-accordion-block-inner\"><div class=\"accordion-item\"><span class=\"accordion-header\" id=\"headingcf36279c-363d-4881-823f-a0986df999b4\"><button class=\"accordion-button collapsed\" type=\"button\" data-bs-toggle=\"collapse\" data-bs-target=\"#collapsecf36279c-363d-4881-823f-a0986df999b4\" aria-expanded=\"false\" aria-controls=\"cf36279c-363d-4881-823f-a0986df999b4\">SOA model<\/button><\/span><div id=\"collapsecf36279c-363d-4881-823f-a0986df999b4\" class=\"accordion-collapse collapse\" aria-labelledby=\"headingcf36279c-363d-4881-823f-a0986df999b4\"><div class=\"accordion-body\"><div class=\"accordion-body-wrap\">\n<p><strong>UNIPAR SOA model<\/strong><\/p>\n<p>Our laboratory\u2019s recent research efforts have improved the state-of-the science-art\u00a0<em>via<\/em>\u00a0the development of the UNIfied Partitioning-Aerosol phase Reaction model (UNIPAR), which utilizes explicit gas chemistry to predict SOA formation from multiphase reactions. UNIPAR vastly improved the accuracy of chamber generated SOA mass predictions. For example, the UNIPAR prediction of isoprene SOA in the presence of inorganic salted wet aerosol is 3-7 times greater than the SOA mass predicted by partitioning alone, suggesting the importance of in-particle chemistry in SOA growth.<\/p>\n<p id=\"block-d2f76fb8-1b43-410a-86d5-9ed19eee4156\" class=\"block-editor-rich-text__editable block-editor-block-list__block wp-block is-multi-selected is-partially-selected wp-block-paragraph rich-text\" role=\"document\" aria-label=\"Block: Paragraph\" data-block=\"d2f76fb8-1b43-410a-86d5-9ed19eee4156\" data-type=\"core\/paragraph\" data-title=\"Paragraph\" data-empty=\"false\" data-wp-block-attribute-key=\"content\">UNIPAR captures the influence of NO<sub>x<\/sub>\u00a0on SOA formation\u00a0<em>via<\/em>\u00a0modulation of the volatility-reactivity distribution of oxidized products derived from the representation of near-explicit gas mechanisms. UNIPAR comprehensively predicts the SOA mass (<em>OM<sub>T<\/sub><\/em>) by incorporating multiphase partitioning (<em>OM<sub>P<\/sub><\/em>) of SVOCs between gas,\u00a0<em>in<\/em>, and\u00a0<em>or<\/em>\u00a0phases and by representing aerosol chemistry (oligomerization, acid-catalyzed reactions, and OS formation) (<em>OM<sub>AR<\/sub><\/em>) of all known SVOC under broad ranges of aerosol acidity and humidity to form both the dry and the wet inorganic salt aerosols. Thus, UNIPAR will improve the accuracy of SOA mass predictions, which are under predicted by current regional models.<\/p>\n<p role=\"document\" aria-label=\"Block: Paragraph\" data-block=\"d2f76fb8-1b43-410a-86d5-9ed19eee4156\" data-type=\"core\/paragraph\" data-title=\"Paragraph\" data-empty=\"false\" data-wp-block-attribute-key=\"content\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-medium wp-image-593\" src=\"https:\/\/faculty.eng.ufl.edu\/myoseon-jang\/wp-content\/uploads\/sites\/761\/2024\/11\/SOA-model_fig_2024-1-scaled-1-300x137.jpg\" alt=\"\" width=\"300\" height=\"137\" srcset=\"https:\/\/faculty.eng.ufl.edu\/myoseon-jang\/wp-content\/uploads\/sites\/761\/2024\/11\/SOA-model_fig_2024-1-scaled-1-300x137.jpg 300w, https:\/\/faculty.eng.ufl.edu\/myoseon-jang\/wp-content\/uploads\/sites\/761\/2024\/11\/SOA-model_fig_2024-1-scaled-1-1024x469.jpg 1024w, https:\/\/faculty.eng.ufl.edu\/myoseon-jang\/wp-content\/uploads\/sites\/761\/2024\/11\/SOA-model_fig_2024-1-scaled-1-768x352.jpg 768w, https:\/\/faculty.eng.ufl.edu\/myoseon-jang\/wp-content\/uploads\/sites\/761\/2024\/11\/SOA-model_fig_2024-1-scaled-1-1536x704.jpg 1536w, https:\/\/faculty.eng.ufl.edu\/myoseon-jang\/wp-content\/uploads\/sites\/761\/2024\/11\/SOA-model_fig_2024-1-scaled-1-2048x938.jpg 2048w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><\/p>\n<\/div><div class=\"accordion-btn-wrap\"><\/div><\/div><\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-create-block-accordion-block-inner\"><div class=\"accordion-item\"><span class=\"accordion-header\" id=\"heading2d27acc8-7e98-4196-84b1-2e7c7bce9206\"><button class=\"accordion-button collapsed\" type=\"button\" data-bs-toggle=\"collapse\" data-bs-target=\"#collapse2d27acc8-7e98-4196-84b1-2e7c7bce9206\" aria-expanded=\"false\" aria-controls=\"2d27acc8-7e98-4196-84b1-2e7c7bce9206\">Mineral dust particles<\/button><\/span><div id=\"collapse2d27acc8-7e98-4196-84b1-2e7c7bce9206\" class=\"accordion-collapse collapse\" aria-labelledby=\"heading2d27acc8-7e98-4196-84b1-2e7c7bce9206\"><div class=\"accordion-body\"><div class=\"accordion-body-wrap\">\n<h4 class=\"wp-block-heading\">Heterogeneous reactions on mineral dust particles<\/h4>\n<p>Mineral dust particles are one of the largest contributors to particle mass loading in the ambient atmosphere, with estimated annual emission of 1000\u22123000 Tg yr. The Gobi desert in Mongolia and northern China and the Sahara desert in Northern Africa are the most important sources of mineral dust particles. In arid environments such as the Southwestern U.S., eolian processes also cause soil erosion, transport mineral dust, and deposit the dust on surfaces where it may intrude. Mineral dust has a wide impact on the Earth System by affecting visibility degradation, the radiative forcing, cloud formation, plant nutrition, and oceanic biogeochemical cycles. During long-range transport, dust particles provide significant surfaces for the heterogeneous reaction with atmospheric trace gases such as SO<sub>2<\/sub>, O<sub>3<\/sub>, NO<sub>x<\/sub>, H<sub>2<\/sub>O<sub>2<\/sub>, and hydrocarbons. The photocatalytic ability of airborne mineral dust particles is known to heterogeneously promote the oxidation of air pollutants, but its prediction is not fully taken by the current models.<\/p>\n<h4 class=\"wp-block-heading\">What is our laboratory doing?<\/h4>\n<ul>\n<li>The impact of authentic mineral dust particles sourced from the Gobi Desert (GDD particles) on the kinetic uptake coefficient of SO<sub>2<\/sub>\u00a0has been comprehensively studied under varying environments (humidity, O<sub>3<\/sub>, NO<sub>x<\/sub>) using the indoor chamber and the UF-APHOR chamber.<\/li>\n<li>The Atmospheric Mineral Aerosol Reaction (AMAR) model was developed to capture the influence of air-suspended mineral dust particles on the formation of nitrate and sulfate under various environments.<\/li>\n<li>Application of the AMAR model to regional scale models<\/li>\n<\/ul>\n<figure id=\"attachment_358\" aria-describedby=\"caption-attachment-358\" style=\"width: 300px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-358\" src=\"https:\/\/faculty.eng.ufl.edu\/myoseon-jang\/wp-content\/uploads\/sites\/761\/2020\/11\/123-306x229-1-300x225.jpg\" alt=\"Camels sitting on the Gobi Desert\" width=\"300\" height=\"225\" srcset=\"https:\/\/faculty.eng.ufl.edu\/myoseon-jang\/wp-content\/uploads\/sites\/761\/2020\/11\/123-306x229-1-300x225.jpg 300w, https:\/\/faculty.eng.ufl.edu\/myoseon-jang\/wp-content\/uploads\/sites\/761\/2020\/11\/123-306x229-1.jpg 306w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><figcaption id=\"caption-attachment-358\" class=\"wp-caption-text\">The Gobi Desert (May 2015)<\/figcaption><\/figure>\n<figure id=\"attachment_370\" aria-describedby=\"caption-attachment-370\" style=\"width: 294px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-370\" src=\"https:\/\/faculty.eng.ufl.edu\/myoseon-jang\/wp-content\/uploads\/sites\/761\/2020\/11\/IMG_0207-294x221-1.jpg\" alt=\"Sample vials of dust from the Gobi Desert\" width=\"294\" height=\"221\" \/><figcaption id=\"caption-attachment-370\" class=\"wp-caption-text\">Mineral dust from the Gobi Deseart<\/figcaption><\/figure>\n<\/div><div class=\"accordion-btn-wrap\"><\/div><\/div><\/div><\/div><\/div>\n\n\n\n<div class=\"wp-block-create-block-accordion-block-inner\"><div class=\"accordion-item\"><span class=\"accordion-header\" id=\"headinga728c754-e658-45d1-b0c7-d92f1a590297\"><button class=\"accordion-button collapsed\" type=\"button\" data-bs-toggle=\"collapse\" data-bs-target=\"#collapsea728c754-e658-45d1-b0c7-d92f1a590297\" aria-expanded=\"false\" aria-controls=\"a728c754-e658-45d1-b0c7-d92f1a590297\">Health Effects<\/button><\/span><div id=\"collapsea728c754-e658-45d1-b0c7-d92f1a590297\" class=\"accordion-collapse collapse\" aria-labelledby=\"headinga728c754-e658-45d1-b0c7-d92f1a590297\"><div class=\"accordion-body\"><div class=\"accordion-body-wrap\">\n<h4 class=\"wp-block-heading\">PM Health Effect<\/h4>\n<p>Health concerns associated with exposure to air pollution are driven by enhanced risk of mortality, reproductive effects, and cardiopulmonary and lung disease. The smaller-sized particles \u2013 those 2.5 micrometers or less in diameter, called PM<sub>2.5<\/sub>\u00a0\u2013 are of greatest health concern because they can reach deep inside the lungs.\u00a0 Both primary combustion particulates and SOA are PM<sub>2.5<\/sub>\u00a0and influence daily base air quality.\u00a0 Primary combustion particulates are recognized as causative agents however increasing attention has been paid to secondary organic aerosol (SOA) produced from atmospheric transformation of hydrocarbons.<\/p>\n<h4 class=\"wp-block-heading\">What is our laboratory doing?<\/h4>\n<ul>\n<li>Development of in vitro exposure technology\n<ul>\n<li>Electrostatic Precipitator (ESP): ESP system allows for online exposure of cells via direct dispersion of aerosol onto the air-liquid interface. We have been improving the particle delivery to in vitro cell cultures and derived a dose model to assess health effects of particulate matter.<\/li>\n<li>Magnetic Precipitator: The noble technology using magnetic nanoparticle (MNP) to deliver SOA onto the biological systems has been invented by our laboratory. SOA was directly core-coated on preexisting MNPs, and delivered to a culture membrane implanting in vitro epithelial cells under a magnetic field.<\/li>\n<\/ul>\n<\/li>\n<li>In vitro studies of SOA: Through collaborative work with pulmonary toxicologists, our lab deliver SOA to the air interface of lung epithelial cells using a novel aerosol delivery system and assess cellular ROS production, viral infectivity, mitochondrial function and lipid composition.<\/li>\n<li>Development of cell-free detection methods to determine toxicity of particulate matter: We have been studying the reactivity of SOA with amino acids by using cell-free chemical assays \u00a0and uncover the molecular mechanisms behind the impact of SOA on biological systems at the cellular level\u00a0<em>in vitro<\/em><\/li>\n<\/ul>\n<figure id=\"attachment_376\" aria-describedby=\"caption-attachment-376\" style=\"width: 263px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-376\" src=\"https:\/\/faculty.eng.ufl.edu\/myoseon-jang\/wp-content\/uploads\/sites\/761\/2020\/11\/IMG_1049-263x197-1.jpg\" alt=\"A lab tech handling a sample vial\" width=\"263\" height=\"197\" \/><figcaption id=\"caption-attachment-376\" class=\"wp-caption-text\">ESP interfaced with ALI cell cultures in vitro<\/figcaption><\/figure>\n<figure id=\"attachment_386\" aria-describedby=\"caption-attachment-386\" style=\"width: 300px\" class=\"wp-caption alignnone\"><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-386\" src=\"https:\/\/faculty.eng.ufl.edu\/myoseon-jang\/wp-content\/uploads\/sites\/761\/2020\/11\/MNP-318x240-1-300x226.jpg\" alt=\"Diagram of a magnetic Precipitator\" width=\"300\" height=\"226\" srcset=\"https:\/\/faculty.eng.ufl.edu\/myoseon-jang\/wp-content\/uploads\/sites\/761\/2020\/11\/MNP-318x240-1-300x226.jpg 300w, https:\/\/faculty.eng.ufl.edu\/myoseon-jang\/wp-content\/uploads\/sites\/761\/2020\/11\/MNP-318x240-1.jpg 318w\" sizes=\"auto, (max-width: 300px) 100vw, 300px\" \/><figcaption id=\"caption-attachment-386\" class=\"wp-caption-text\">Magnetic Precipitator<\/figcaption><\/figure>\n<\/div><div class=\"accordion-btn-wrap\"><\/div><\/div><\/div><\/div><\/div>\n<\/div><\/div><\/div><\/section><\/div>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":468,"featured_media":0,"parent":0,"menu_order":1,"comment_status":"closed","ping_status":"closed","template":"page-templates\/page-sidebar-none.php","meta":{"_acf_changed":false,"inline_featured_image":false,"featured_post":"","footnotes":"","_links_to":"","_links_to_target":""},"class_list":["post-623","page","type-page","status-publish","hentry"],"acf":[],"_links":{"self":[{"href":"https:\/\/faculty.eng.ufl.edu\/myoseon-jang\/wp-json\/wp\/v2\/pages\/623","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/faculty.eng.ufl.edu\/myoseon-jang\/wp-json\/wp\/v2\/pages"}],"about":[{"href":"https:\/\/faculty.eng.ufl.edu\/myoseon-jang\/wp-json\/wp\/v2\/types\/page"}],"author":[{"embeddable":true,"href":"https:\/\/faculty.eng.ufl.edu\/myoseon-jang\/wp-json\/wp\/v2\/users\/468"}],"replies":[{"embeddable":true,"href":"https:\/\/faculty.eng.ufl.edu\/myoseon-jang\/wp-json\/wp\/v2\/comments?post=623"}],"version-history":[{"count":3,"href":"https:\/\/faculty.eng.ufl.edu\/myoseon-jang\/wp-json\/wp\/v2\/pages\/623\/revisions"}],"predecessor-version":[{"id":707,"href":"https:\/\/faculty.eng.ufl.edu\/myoseon-jang\/wp-json\/wp\/v2\/pages\/623\/revisions\/707"}],"wp:attachment":[{"href":"https:\/\/faculty.eng.ufl.edu\/myoseon-jang\/wp-json\/wp\/v2\/media?parent=623"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}