Vol. 77, No. 2, [Part 1: Physical Sciences] (Feb., 1980), pp. 698-702 (5 pages) PNAS is the world's most-cited multidisciplinary scientific serial. It publishes high-impact research reports, ...

Organic peroxy radicals (RO 2) and Criegee intermediates (CI, carbonyl oxides) are key reactive species in atmospheric chemistry and play crucial roles in the formation of secondary organic aerosol ...

A dilute solution of bromine is added to samples of heptane and cyclohexene. The bromination reactions and mechanisms are compared. UV light splits the bromine molecule into two reactive radicals, ...