Medical

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.
Collins Dictionary of Biology, 3rd ed. © W. G. Hale, V. A. Saunders, J. P. Margham 2005
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References in periodicals archive
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.
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.
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].
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