Carotenoid molecules suppress damaging photochemical reactions, in particular those including oxygen, which exposure to sunlight can cause.
12.
Biotic transformation is mediated by microorganisms, while abiotic transformation involves processes such as chemical and photochemical reactions.
13.
Alternatively, the sand could also have come from organic solids produced by photochemical reactions in Titan's atmosphere.
14.
Upon irradiation it converts to " cis "-stilbene, a classic example of a photochemical reaction involving trans-cis isomerization.
15.
The supramolecular Quasi-crystals are produced in photochemical reaction by exposing solutions of photochromic spiropyran molecules to UV radiation.
16.
The radicals are produced by thermal or photochemical reactions, usually from colligation and diffusion, or disproportionation of radical pairs.
17.
PAA is also formed naturally in the environment through a series of photochemical reactions involving formaldehyde and photo-oxidant radicals.
18.
It is the antithesis of a photochemical reaction, in which light is used to drive an endothermic chemical reaction.
19.
One study showed that ultraviolet irradiation to cis-resveratrol induces further photochemical reaction, producing a fluorescent molecule named " Resveratrone ".
20.
UV rays in sunlight are energetic enough to produce a photochemical reaction that changes the optical properties of the dye.
