We demonstrate that UV radiation can photooxidize
leaf litter, producing carbon dioxide, which is either emitted directly to the atmosphere, or accumulated as dissolved inorganic carbon (DIC) in the water.
Additionally, in vitro studies show that KYN is able to photooxidize
cysteine, NADH, and ascorbic acid and this capacity may be directly relevant to photobiological processes occurring in the lens in vivo.
This mechanism could be operative in commercial type PVDF paints, especially since they contain an acrylic component that is less inherently weatherable than the PVDF resin, which could photooxidize
leading to binder contraction, which is inhomogeneous in the x-y plane.
HPD can photooxidize
cysteine by type I and/or type II processes, depending on reaction conditions .