ultraviolet irradiation

The 1,1-dichloroethane is then converted to 1,1,1-trichloroethane by reaction with chlorine under ultraviolet irradiation:

In 1935, the chemical structure of vitamin D was established and proven to result from the ultraviolet irradiation of 7-dehydrocholesterol.

Vitamin D metabolism is complex because the provitamin can be formed in the skin by ultraviolet irradiation or obtained from the diet.

Stilbene photocyclization is the coupling of two aromatic carbons in stilbenes upon ultraviolet irradiation.

Vitamin D (cholecalciferol) is produced by ultraviolet irradiation (UV) of its precursor 7-dehydrocholesterol.

Ultraviolet irradiation of human skin causes functional vitamin A deficiency, preventable by all-trans retinoic acid pre-treatment.

The trans- form can undergo isomerisation to the cis- form when exposed to ultraviolet irradiation, a process called photoisomerization.:

McClain and Spendlove demonstrated MR for three types of reovirus after exposure to ultraviolet irradiation.

In fact, ultraviolet irradiation is actually detrimental as it inhibits photosynthesis, photoreduction, and the 520 nm light-dark absorbance change of algae.

Ultraviolet irradiation: can be used to excite nucleic acids and create photoreactions, which results in damaged bases in the DNA strand.

Even in the 25 years since medical groups began warning that ultraviolet irradiation can lead to skin cancer as well as to dire consequences for the appearance-conscious - wrinkles!

They belong to the mitogen-activated protein kinase family, and are responsive to stress stimuli, such as cytokines, ultraviolet irradiation, heat shock, and osmotic shock.

In this study, we present an extremely sensitive PCR based assay to detect airborne rhinovirus and demonstrate the effect of ultraviolet irradiation on the assay.

Current or developing indoor air purification technologies include filtration, aerosol ultraviolet irradiation, electrostatic precipitation, unipolar ion emission, and photocatalytic oxidation.

This strong ultraviolet irradiation from the central star is believed to create the characteristic fluorescent green tint of the nebula via the radiation of doubly ionized oxygen.

Cholecalciferol is produced industrially for use in vitamin supplements and to fortify foods by the ultraviolet irradiation of 7-dehydrocholesterol extracted from lanolin found in sheep's wool.

Pulsed-field gel electrophoresis analysis of chromosomes after ultraviolet irradiation has revealed extensive chromosome degradation dependent on uvrA incision enzyme [ 27 ] .

The processes selected were chlorination/dechlorination for Calumet and ultraviolet irradiation (UV) with low pressure high output lamps for North Side.

Contamination was managed primarily through serialization, heat denaturation, enzymatic digestion, screening, repeated analysis, ultraviolet irradiation, iodinizing irradiation, use of controls and samples taken from a healthy volunteer.

Scission is easily achieved by ultraviolet irradiation in the presence of oxygen gas, which suggests that adhesive devices employing diffusive bonding actually benefit from prolonged exposure to heat/light and air.

If the top of the egg is exposed to a sufficient dose of ultraviolet irradiation the nucleus is inactivated and is functionally useless while the cytoplasm is unaffected.

NF-κB is a transcription factor that is activated by various intra- and extra-cellular stimuli such as cytokines, oxidant-free radicals, ultraviolet irradiation, and bacterial or viral products.

In practice a few frogs have been produced by killing the egg nucleus by ultraviolet irradiation, and replacing it with the nucleus from a cell of the gut of a tadpole.

Celcade is a device-based outpatient procedure involving ex vivo exposure of 10ml autologous blood to heat, ultraviolet irradiation, controlled oxidative ozone therapy and subsequent intramuscular administration at monthly intervals.

Moreover, ultraviolet irradiation creates surface oxygen vacancies at bridging sites, resulting in the conversion of relevant Ti sites to Ti sites which are favourable for dissociative water adsorption.