BEGIN:VCALENDAR VERSION:2.0 PRODID:-//ZContent.net//ZapCalLib 1.0//EN CALSCALE:GREGORIAN METHOD:PUBLISH BEGIN:VEVENT SUMMARY:Indoor Surface Chemistry as a Source of Respirable Reactive Oxygen Species LOCATION:Chemistry A101 TZID:America/Denver DTSTART:20241113T160000 UID:2026-04-22-01-23-38@natsci.colostate.edu DTSTAMP:20260422T012338 Description:About the Seminar:\n\nIndoor ozone chemistry generates a broad range of oxidized products. A surrogate of indoor exposure to ozone reacti on products\, “ozone loss”\, has recently been shown to correlate stro ngly with cardiorespiratory pathophysiology\, especially at elevated indoo r PM concentrations. Among indoor ozone reaction products are reactive oxy gen species (ROS)\, a chemical class linked to the onset of diabetes\, car diovascular and neurodegenerative diseases. Our group has been exploring i ndoor ROS through modeling\, laboratory studies and field research. We are interested in the potential for indoor surfaces to be a substantial sourc e of ROS present in indoor PM. We hypothesize that when ozone reacts with soiled indoor surfaces soiled\, relatively stable forms of ROS are generat ed. Some of this ROS has just the right volatility to partition from those surfaces to suspended particles\, which can then be inhaled.  Our studie s are showing that ROS is indeed forming at substantial yields with unsatu rated lipid mixtures typical of surface films\, ROS is elevated on real su rfaces in occupied homes\, and ROS can partition from these surfaces throu gh air to other films and particles. We believe that the general mechanism of ozone surface chemistry and subsequent partitioning of products to res pirable particulate matter may be an important contributor to the long-obs erved health effects of ambient ozone and PM2.5.\n\nAbout the Speaker: \n \nGlenn Morrison is a professor of Environmental Science &\; Engineerin g at the University of North Carolina and has been studying indoor and out door air pollution and human exposure for more than 30 years. He received his PhD from Berkeley\, and his research has primarily been related to ind oor physics and chemistry. He has a particular interest in interfacial che mistry\, having also worked as a chemical engineer on heterogeneous cataly sis. This research has included ozone-surface chemistry\, acid-base chemis try and its role in adsorption of chemicals to indoor surfaces\, methamphe tamine contamination in buildings\, aerosol-SVOC modeling and field measur ements of reactive oxygen species in homes. In recent years\, he has focus ed how clothing controls dermal uptake of indoor contaminants. From 2014-2 016 he was the President of the International Society of Indoor Air Qualit y and Climate (ISIAQ) and is currently an associate editor of Indoor Envir onments. 4:00 pm END:VEVENT END:VCALENDAR