Researchers determined that previous assumptions about nitrogen oxide levels were overly simplistic; the amount of SOA produced from isoprene released by trees as well as the SOA volatility are more accurately tied to interactions with electron - rich, carbon - based chemicals, known as organic peroxy radicals, that compete with nitrogen oxides in reactions. (sciencedaily.com)
Researchers found that the volatility and oxidation state of isoprene SOA are sensitive to, and exhibit a nonlinear dependence on, NOx levels. (sciencedaily.com)
Breath measurements taken from volunteers throughout the day allowed researchers to track changes in isoprene levels following activities such as exercise or eating. (sciencedaily.com)