photoactivation

photoactivation

the excitation of atoms by light energy so that electrons become temporarily raised to a higher energy level. The process is the starting point of PHOTOSYNTHESIS, when light strikes a CHLOROPHYLL molecule. see LIGHT REACTIONS.
References in periodicals archive ?
- photoactivation unit capable of irradiating a selected region of interest in a field of view by using light of a discrete wavelength.
PH-10 is self-applied to affected skin with photoactivation via ambient exposure to visible light.
Once we identify a synaptic ensemble that breaks the balance in a neural circuit, it should be possible to induce disconnection of this synaptic ensemble via photoactivation of AS-PaRac1.
The role of light in biological processes includes vitamin D conversion and photoactivation when skin is exposed to sunlight.
A light-emitting diode (Radii Cal- SDI- Australia) at 1200 mW/[cm.sup.2] was used for photoactivation.
After a brief 3-second photoactivation (FlashLite 1401; Discus Dental, Culver City, CA, USA; power density [greater than or equal to]1100 mW/[cm.sup.2], wavelength range between 460 and 480 nm), the excess adhesive was removed around the base of the brackets without displacing them.
Yates, Surface science studies of the photoactivation of TiO2-new photochemical processes, Chem.
Hunt et al., "Photoactivation of endogenous latent transforming growth factor-[beta]1 directs dental stem cell differentiation for regeneration," Science Translational Medicine, vol.
On the contrary, the combination of piezoelectricity with photoactivation showed an improvement in their photocatalytic performance [5].
Yu, "Interaction between titanium dioxide nanoparticles and human serum albumin revealed by fluorescence spectroscopy in the absence of photoactivation," Journal of Luminescence, vol.
It involves the photoactivation of riboflavin with ultraviolet-A (UVA) radiation, that unfolds a series of photochemical reactions inducing inter- and intrafibrillary cross links in the corneal stromal lamellae [4].