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Items for "ultraviolet radiation"

Singlet oxygen inactivates protein tyrosine phosphatase-1B by oxidation of the active site cysteine

Singlet oxygen (1O2), an electronically excited form of molecular oxygen, is a mediator of biological effects of ultraviolet A radiation, stimulating signaling cascades in human cells...

Keywords: oxidative stress, photosensitization, signal transduction, tyrosine phosphorylation, ultraviolet radiation

10/2006 | Biological Chemistry, Walter de Gruyter
Ultraviolet B radiation induces cell shrinkage and increases osmolyte transporter mRNA expression and osmolyte uptake in HaCaT keratinocytes

We have previously shown that compatible organic osmolytes, such as betaine, myo-inositol and taurine, are part of the stress response of normal human keratinocytes (NHKs) to ultraviolet B (UVB) radiation...

Keywords: betaine, cell volume, keratinocytes, myo-inositol, osmolytes, taurine, ultraviolet radiation

12/2007 | Biological Chemistry, Walter de Gruyter
Violet light causes photodegradation of wood beyond the zone affected by ultraviolet radiation

The limited penetration of wood by light explains why the weathering of wood exposed outdoors is a surface phenomenon...

Keywords: depth profile, FT-IR, photodegradation, sugi wood, ultraviolet radiation, violet light, visible light, wavelength

01/2007 | Holzforschung, Walter de Gruyter