Barbara Finlayson-Pitts, chemistry professor at UC Irvine, has been awarded the Tolman Medal from the Southern California section of the American Chemical Society in recognition of her outstanding contributions to chemistry. She will receive the prize during a dinner meeting at the University Club Wednesday, May 7. Finlayson-Pitts studies chemical reactions in the atmosphere to better understand air pollution. She directs AirUCI (Atmospheric Integrated Research for Understanding Chemistry at Interfaces), a group that researches how reactions on the surfaces of airborne particles, buildings and vegetation affect air quality and global climate change.