photolysis

[fō′täl·ə·səs]

(physical chemistry)

The use of radiant energy to produce chemical changes.

The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Photolysis

the decomposition of molecules that occurs when the molecules absorb light. The decomposition products may be molecules with a smaller number of atoms, free radicals or atoms, or positive and negative ions. If the products are free radicals or atoms, the process is called photodissociation. If the products are positive and negative ions, the process is known as photoionization.

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References in periodicals archive

Figure 2c shows that the NO is generated from the photolysis of HONO in the solar radiation zone and diffused to the ambient air.

Computational Fluid Dynamics (CFD) Modeling Indoor Chemical Reactions under Varied Lighting and HVAC Operation Conditions

All AOPs used in this study appeared to be capable of completely decolorizing the azo dye Remazol Black B within feasible reaction time, ranging from few minutes to 30 minutes, except UV alone as the dye seemed to be resistant to direct photolysis. Fenton's process was found to be a suitable and promising treatment method as compared to other AOPs.

Decolorization of Reactive Azo Dye Remazol Black B by Using Advanced Oxidation Processes (AOPs)

When flash photolysis was applied instead of 20 Hz stimulation, the Ca sensitivity of release was decreased by a factor of 2, indicating that the intrinsic Ca sensitivity of fast releasing vesicles is heterogeneous (the remaining vesicles after 20 Hz stimulation are slower by a factor of 2).

Kinetics of transmitter release at the calyx of Held synapse

The contribution due to photolysis is negligible; for this reason, the LVREA due to the reactive species was not added in the photolysis term.

Modelling and simulation of the radiant field in an annular heterogeneous photoreactor using a four-flux model

Oelgemoller, "Solar photolysis versus Ti[O.sub.2]-mediated solar photocatalysis: a kinetic study of the degradation of naproxen and diclofenac in various water matrices," Environmental Science and Pollution Research, vol.

Photocatalytic Efficiency of Ti[O.sub.2]-Biomass Loaded Mixture for Wastewater Treatment

Degradation processes under direct photolysis did not contribute to the process of photocatalytic degradation; in the non-preheated condition percentages of degradation of 11% and 9.5% for the isothermal condition at 312 K were obtained.

Modelado y evaluacion experimental de un reactor solar fotocatalitico no isotermico: efecto de la temperatura sobre la cinetica de la velocidad de reaccion

Gugumus, "Contribution to the photolysis of hydroperoxides in polyethylene," Polymer Degradation and Stability, vol.

Corrigendum to "Investigating the Degradability of HDPE, LDPE, PE-BIO, and PE-OXO Films under UV-B Radiation"

After photolysis and dark adsorption experiments were performed, results were depicted as well (Figure 9).

Preparation of Ti[O.sub.2] Nanotubes Loaded on Polyurethane Membrane and Research on Their Photocatalytic Properties

The COD reduction of the vinasse samples after photolysis (without catalyst) is included for comparison.

Photodegradation of sugarcane vinasse: evaluation of the effect of vinasse pre-treatment and the crystalline phase of Ti[O.sub.2]/ Fotodegradacao da vinhaca: avaliacao do efeito do pre-tratamento da vinhaca e da fase cristalina do Ti[O.sub.2]

The use of certain sunscreens, which can protect skin from ravages of sunlight, can also deposit peroxy and hydroxy radicals along with their photolysis fragments on skin.

Shielding skin from airborne antagonists