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 ?
Photodissociation is a process in which a chemical compound is broken down by photons.
of the Negev, Israel) explains the methodology behind vibrationally mediated photodissociation (VMP) through the use of theoretical and experimental models, and outlines techniques for studying diatomic molecules and radicals, triatomic molecules excluding water, water isotopologues and tetratomic molecules.
Moreover, the possibility of measuring accurate alkali metal cation affinities with high accuracy by means of different experimental techniques (equilibrium constant determination by high pressure mass spectrometry (HPMS) [1-4] or ion cyclotron resonance (ICR) [5-9], unimolecular dissociation--Cook's kinetic method [4, 10, 11], energy resolved collision-induced dissociation (CID) [12-14], photodissociation and radiative association kinetics [15, 16]), has stimulated a growing interest in the study of these interactions [17-19].
The limitations of the LTQ Orbitrap compared to the LTQ-FT are that it cannot perform infrared multiphoton photodissociation or ECD and has a resolution of 100,000.
The purified Hb Gorwihl and Hb A fractions were isolated by PolyCAT A HPLC (using bis-Tris--KCN buffer) and concentrated on 10-kDa membrane, and their functional properties were evaluated by the kinetics of carbon monoxide recombination after photodissociation by 10-ns pulses at 436 run, as described previously (14).
West, Vacuum Ultraviolet Photojonization and Photodissociation of Molecules and Clusters, C.
The energized oxygen arises by photodissociation, a process whereby the sun's energy breaks up high-altitude ozone and other oxygenated molecules, Houston says.
Remarkably, insights into how water is bound to the catalyst and into the dynamics of the photodissociation reaction, have been scarce up to now, due to the lack of suitable techniques to interrogate water at the interface.