Sentences with phrase «for ultraviolet radiation»

UV stands for UltraViolet radiation.

Not exact matches

@Chad: I. Mutations in DNA sequences generally occur through one of two processes: A. Environmental factors: DNA damage from environmental agents such as ultraviolet light (sunshine), nuclear radiation or certain chemicals B. Mistakes that occur when a cell copies its DNA in preparation for cell division.

Ultraviolet radiation from the sun and artificial sources is the most preventable risk factor for all forms of skin cancer, including melanoma.

Boss and his colleagues have hypothesized that solar ultraviolet (UV) radiation could account for the stunted core, if gravitational instability is at play.

In the new study, pollen grains of a modern dwarf pine species, considered an analog for the ancient species, were similarly malformed under high levels of ultraviolet - B radiation (bottom row).

They can also be used for biological labeling because of their low toxicity, chemical stability, and intense luminescence when excited by near - IR radiation, which can penetrate tissue much better than higher energy radiation such as ultraviolet, as is often required with quantum dot labels.

«Further, understanding how to manipulate skin tone without the need for harmful ultraviolet radiation or toxic chemicals could have a significant impact on the cosmetic industry, as large numbers of people around the world currently spend billions of dollars in often unsuccessful or potentially dangerous attempts to lighten or darken their natural skin color.

Washington State University researchers have mapped the damage of ultraviolet radiation on individual units of DNA, opening a new avenue in the search for how sunlight causes skin cancer and what might be done to prevent it.

Researchers have offered a number of explanations for the die - off: attacks of parasites, exposure to radiation or ultraviolet light, fungal infections, climate change, habitat loss, competition with exotic species, and pesticides.

In the malignant tissue, they found up to 1500 genes with mutations — a level higher than has been found for either lung cancer in smokers or skin cancer in patients with heavy exposure to ultraviolet radiation.

Such unexpected atmospheric structures may also have consequences for habitability, given that most of the planet would not be protected against ultraviolet (UV) radiation.

The iron minerals have special qualities — They absorb harmful ultraviolet radiation, but the part of the sunlight needed for photosynthesis can still be used by organisms.

For example, earlier research suggested that Neanderthal DNA influenced skin cells known as keratinocytes that help protect the skin from environmental damage such as ultraviolet radiation and germs.

For example, he says, the cosmic ray effect could explain why CFC and ozone levels decline during the Antarctic winter, when ultraviolet radiation is scarce.

Astronomers have known for about a decade ultraviolet and X-ray radiation from the main star in HD 189733 are evaporating the atmosphere of HD 189733b over time.

For example, from laboratory experiments we can determine the amount of amino acids produced per photon of ultraviolet radiation, and from our knowledge of stellar evolution we can calculate the amount of ultraviolet radiation emitted by the sun over the first billion years of the existence of the earth.

Using observatories that can see ultraviolet radiation, like the Hubble Space Telescope, astronomers have spotted enough WHIM to account for about 50 % to 70 % of the missing baryons — still leaving a significant fraction unaccounted for.

«On the one hand, we think we have good news for where people live and get ultraviolet radiation and where we grow our crops,» says Weatherhead.

Glass, for example, strongly absorbs ultraviolet radiation.

This initially leaves it stranded inside the decaying host, so it has to protect itself, perhaps for years, against adverse environmental conditions such as heat, ultraviolet radiation and drought, until it is once again ingested by an insect.

Using premier beams of ultraviolet light at the ALS, a DOE national user facility for synchrotron radiation, the collaboration has reported the first demonstration of high - temperature superconductivity in the surface of a topological insulator — a unique class of advanced materials that are electrically insulating on the inside but conducting on the surface.

«They show that the ultraviolet radiation from the chromosphere is highly suitable for visualizing detailed structures and processes.»

The ozone layer would disappear for several years, allowing deadly ultraviolet radiation to reach the Earth's surface and kill many species.

Any solar effect (either direct or indirect) which is correlated to solar activity (i.e. solar irradiance, solar magnetic field [and thus galactic cosmic rays], ultraviolet [UV] radiation, etc.) is accounted for in the linear regression.

Epidemiologic evidence for different roles of ultraviolet A and B radiation in melanoma mortality rates.

The remnants of the vortex — which contain the depleted ozone — typically pass overhead at about 45 to 50 degrees north latitude, over parts of Europe and North America, for a few days in spring, causing the potential for ultraviolet (UV) radiation exposure to increase, said Rex.

Children and teens who are exposed to the sun's harmful ultraviolet radiation are at greater risk for developing skin cancer in adulthood, the task force explained.

People who engage in indoor tanning are exposed to ultraviolet radiation, a major risk factor for skin cancer.

Most Brazilians wear the same pair every day for about two years, the study notes, yet it has not been proven that lenses maintain the same level of protection after that type of exposure to ultraviolet radiation.

Niacinamide also acts as an antioxidant and has been studied for its effectiveness in helping to support healthy cartilage and joint function, helping to promote joint comfort and mobility, and helping to provide support for healthy skin in various ways including protection from the damaging effects of ultraviolet radiation.

In fact, exposure to ultraviolet light (UVA and UVB) accounts for 90 % of the symptoms associated with photoaging, which refers to the damage that is done to the skin from prolonged exposure to UV radiation.

At normal temperature the virus can remain active in infected tissue for several weeks, provided the infected source does not dry out, or become exposed to ultraviolet radiation (sun light).

In addition to thermal energy, the sun also produces high levels of ultraviolet radiation that many herp species use for specific physiological functions.

WOUDC receives guidance from the WMO SAG for issues related to both ozone and solar ultraviolet radiation data.

Current data categories for ozone are total column ozone, lidar, ozonesonde, Umkehr and ultraviolet radiation data categories are broadband, multiband and high resolution spectral.

Although only 1 percent of the sun's energy is emitted at ultraviolet wavelengths between 200 and 300 nanometers, the decrease in this radiation from 1 July 1981 to 30 June 1985 accounted for 19 percent of the decrease in the total irradiance over the same period.»

But the raised risk of skin cancers from the extra ultraviolet radiation streaming through the thinned ozone layer is real enough, particularly for reckless white - skinned sunbathers.

For the important ultraviolet photons which are desired to be removed from the solar radiation are those less energetic photons which decompose the ozone molecules to produce another oxygen atom which again can reform another ozone molecule.

'' «It all amounts to a mystery, but a troubling one because ozone protects life at the surface from incoming ultraviolet radiation, and any thinning of total ozone in the stratosphere is cause for concern.

The small amount of this high energy, ultraviolet radiation that normally reaches Earth's surface is responsible for sunburn, skin cancer, cataracts, and damage to genetic material.

Any solar effect (either direct or indirect) which is correlated to solar activity (i.e. solar irradiance, solar magnetic field [and thus galactic cosmic rays], ultraviolet [UV] radiation, etc.) is accounted for in the linear regression.

Radiation at ultraviolet wavelengths dissociates atmospheric molecules, initiating chains of chemical reactions — specifically those producing stratospheric ozone — and providing the major source of heating for the middle atmosphere, while radiation at visible and near - infrared wavelengths mainly reaches and warms the lower atmosphere and the Earth's surface1.

Hufbauer (1991), pp. 278 - 80; for example, a 1978 workshop concluded that changes in stratospheric ozone due to ultraviolet radiation might influence climate McCormac and Seliga (1979), pp. 18, 20.

Was it not the introduction of quantization that led from the «ultraviolet catastrophe» that is quite unrelated to Maxwell's equations for electromagnetic radiation to the highly successful BB radiation formula of Planck.

Infection Prevention Technologies LLC v. Lumalier, No. 10 - 12371 (E.D. Mich.): Lead counsel for plaintiff in patent infringement action involving room disinfection patents where reflected ultraviolet radiation is the method by which the room is disinfected.

The relationship remained significant when per capita Gross Domestic Product was entered as a covariate as well as when latitude, a measure of historical climate as well as ultraviolet radiation exposure (Hancock et al., 2008), was controlled for.