photolysis


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photolysis

 [fo-tol´ĭ-sis]
chemical decomposition or change by the action of light or other radiant energy. adj., adj photolyt´ic.

pho·tol·y·sis

(fō-tol'i-sis),
Decomposition of a chemical compound or cleavage of a chemical bond by the action of light.
[photo- + G. lysis, dissolution]

photolysis

/pho·tol·y·sis/ (fo-tol´ĭ-sis) chemical decomposition or change by the action of light or other radiant energy.photolyt´ic

pho·tol·y·sis

(fō-tol'i-sis)
Decomposition of a chemical compound by the action of light.
[photo- + G. lysis, dissolution]

photolysis

chemical decomposition using light energy (‘splitting by light’). In 1933, Cornelius van Niel proposed that the initial step in PHOTOSYNTHESIS was the photolysis of water, leading to the release of oxygen ions (forming oxygen gas) and hydrogen ions which were involved in the reduction of NADP during the LIGHT REACTIONS. Recently it has become more common to explain the breakdown of water as a ‘separation of charge’, a fast spontaneous ionic reaction with water splitting into hydrogen (H+) and hydroxl (OH-) ions. The end result is the same as photolysis, but light is not thought to be involved in the process.

photolysis

chemical decomposition by light.
References in periodicals archive ?
Process Condition Initial reactor temperature (K) Photolysis Non-preheated 305 Isothermal 312 306 Non-preheated 305 Photocatalysis 323 Preheated 321 Isothermal 307 318 Table 2.
3] with alcohols, alkanes, and aromatics can be observed, which implies that highly reactive hydroxyl radicals generated from photolysis of [O.
Hydroxyl radicals generated in water by ultrasonication and photolysis can produce hydrogen peroxide in the system according to equations (5)(17).
The most direct method for generating hydroxyl radicals is the breaking of hydrogen peroxide by photolysis ([H.
Manganese is the basic element which acts as carrier of electrons from photolysis of water in oxygen evolving complex.
Therefore its photolysis is rather insignificant, even though on the surface (where no molecule-tearing ultraviolet radiation reaches) it may accumulate and--at least for the moment--dominate.
Photo-induced bimolecular electron transfer processes of fullerenes (C60/C70) with fluorene derivatives, namely 9,9- bis(4-amino-3-methylphenyl)fluorene, 9,9-bis(4-amino-3- fluorophenyl)fluorene and 9,9-bis(3-amino-4- hydroxyphenyl)fluorene had been comparatively studied in benzonitrile by nanosecond laser photolysis technique in the visible/near-infrared regions.
Electrochemical photolysis of water at a semiconductor electrode.
It also adds a section on non-specific methods for the destruction of hazardous organic chemicals, including potassium permanganate oxidation and advanced oxidation processes, such as the Fenton reaction and photolysis.
The extracts stored in amber glass bottles to avoid photolysis and stored at -20 [degrees]C in a freezer, until they were used in the bioassays.
The Report of the Board of Review for Decamethylcyclopentasiloxane (Siloxane D5) concluded that, due to its high vapour pressure, D5 tends to partition primarily into air, where it is quickly degraded into harmless compounds by indirect photolysis.
Any protein that has a DNA sequence 25-50% similar to that of photolysis, but that lacks photolysis' ability to use blue light to repair UV-induced DNA damage, is called a cryptochrome (Lin & Todo, 2005; Sancar, 2004).