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"From atmospheric particles to biological impact: Tracing the role of organic aerosols", Dr. Christina Vasilakopoulou, Chemistry Seminar Room Θ-307, at 12.00 pm.Abstract
Atmospheric aerosols pose significant risk to human health, contributing to conditions such as asthma, heart disease and pregnancy complications as highlighted by the World Health Organization. Organic aerosol (OA) is one of the most important components of atmospheric particles with contributions up to 90% of the sub-micrometer aerosol mass. Secondary OA (SOA) is formed in the atmosphere during the oxidation of organic vapors and can dominate the total organic PM in particles with aerodynamic diameter of less than 1 μm (PM1) especially in warmer periods. Despite its importance, key aspects of SOA evolution remain uncertain, especially in terms of its impact on human health and respiratory outcomes. This talk presents recent advances in three connected aspects of SOA evolution. First, the physical and chemical pathways involved in the formation of SOA will be discussed, highlighting key transformation mechanisms. Second, the timescales associated with these processes will be examined, with emphasis on how rapidly SOA composition can change under atmospheric conditions. Finally, recent results on the toxicity of SOA will be presented, focusing on how exposure to secondary organic particles may affect respiratory health. To investigate these effects, a first coupling of the CESAM atmospheric simulation chamber with an air–liquid interface exposure system has been achieved. This configuration enables controlled exposure of human bronchial epithelial cells to SOA, allowing assessment of the associated biological responses.
https://www.researchgate.net/profile/Christina-Vasilakopoulou-2
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Event Venue
Department of Chemistry, University of Crete-Τμήμα Χημείας, Παν/μιο Κρήτης, Αμφιθέατρο Α1 Χημικό, 715 00 Ηράκλειο, Ελλάδα, Irakleion, Greece
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