(Georgia Institute of Technology, 2021-01-12)
Butera, Robert J.; Choi, Katherine; Craig, Kentez; Farrugia, Sherry N.; Fisher, Michael; Gibson, Greg; Harris, T. Robert; Montreuil, Benoit; Ng, Nga Lee; Saldaña, Christopher J.; Saxena, Rahul; Zheng, Talia
The battle against COVID-19 is a worldwide challenge unlike any in living memory. The Georgia Tech community has joined the fight, contributing our expertise, innovation, and indomitable spirit to the effort. Even as we remain committed to serving our students, faculty, and staff, we have accelerated our advancement of technology in response to our world's new reality. In fact, our work has deepened the understanding of Covid-19’s trajectory, the risks associated with gatherings, Covid-19's impact on the economy, and helped to save lives and improve health outcomes locally around the world.
(Georgia Institute of Technology, 2019-11-26)
Ng, Nga Lee
Organic aerosols constitute a significant fraction of submicron fine particulate matter (PM) in the atmosphere. Secondary organic aerosols (SOA) formed from condensation of low-volatility species produced by oxidation of gas-phase organic compounds often dominate the mass of atmospheric organic aerosols. Understanding the formation of SOA has proven to be a challenge owing to the difficulty in identifying and quantifying all the gas-phase precursors as well as the complex, multi-generation oxidative chemistry that leads to the aerosol formation. Laboratory chamber experiments provide the basic understanding needed for predicting SOA formation. Ambient field measurements provide important datasets for understanding the chemistry and life cycles of atmospheric aerosols. In this work, we employed an integrated laboratory and field measurement approach to investigate how emissions from human activities (e.g., SO2, NOx) interact with emissions from trees in the formation of SOA. We will also discuss oxidative stress induced by laboratory and ambient aerosols for understanding their impacts on human health upon exposure.