Sentences with phrase «ultraviolet radiation which»

The sun's solar rays are in the form of ultraviolet radiation which due to it's intensity and frequency has the ability to penetrate the more dense greenhouse gases such as CO2 and methane.

The HPA tested a sample of compact fluorescent light bulbs (CFLs) and found that some emitted ultraviolet radiation which could, under certain conditions, expose people above international guidelines.

Not exact matches

«Sunbeds give out ultraviolet (UV) rays, which is the same type of harmful radiation found in sunlight.

Not only do jumping spiders have eight eyes positioned to create nearly 360 - degree vision, but some species can detect ultraviolet radiation, which facilitates mating.

In addition to emitting visible light, the stars also gave off ultraviolet (UV) radiation, which split the neutral hydrogen it encountered into electrons and protons — ionizing it once again, and thereby launching what researchers call the «epoch of reionization.»

In tomorrow's issue of the Proceedings of the National Academy of Sciences, two researchers point the finger at chemical changes in the molecule transurocanic acid — which at one time was thought to protect against ultraviolet (UV) radiation damage — as a possible controlling agent in the process.

While lower - energy ultraviolet radiation breaks up water molecules — a process called photodissociation — ultraviolet rays with more energy (XUV radiation) and X-rays heat the upper atmosphere of a planet, which allows the products of photodissociation, hydrogen and oxygen, to escape.

Although Proxima Centauri's dimness provides the planet with a balmy climate, the star is prone to outbursts of harsh X-ray and ultraviolet radiation, which could damage any chance of life on the planet — X-rays hit the surface 400 times more often than those from the sun pummel Earth.

Before the development of photosynthesis, which creates oxygen, Earth's surface was bombarded by ultraviolet radiation and was relatively inhospitable to life.

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.

The cooldown would be the result of what scientists call a grand minimum, a periodic event during which the Sun's magnetism diminishes, sunspots form infrequently, and less ultraviolet radiation makes it to the surface of the planet.

And ozone, which forms a beneficial shield against ultraviolet radiation when high in the stratosphere, is an efficient greenhouse gas when it appears at airliner altitudes — as it increasingly does, since it too is a by - product of fossil fuel burning.

Few foods are natural sources of vitamin D, which is more abundantly produced when ultraviolet radiation from sunlight strikes the skin and triggers synthesis.

The hole in the ozone layer over Antarctica, which allows harmful ultraviolet radiation to penetrate our atmosphere, is finally starting to heal.

He cites extreme dryness of the planet, which is also pelted by blistering levels of ultraviolet radiation.

Those compounds alone can destroy ozone, which helps block the sun's ultraviolet radiation.

Titan's atmosphere is full of methane, which should react with ultraviolet radiation from the sun to produce liquid ethane.

The haze results from chemical reactions in the upper atmosphere, where ultraviolet radiation from the sun ionizes nitrogen and methane, which react to form tiny hydrocarbon particles tens of nanometers in diameter.

A final possibility is that there has been increased formation of the hydroxyl radical in the atmosphere — perhaps caused by the thinning of the ozone layer, which allows more ultraviolet radiation to reach low levels.

When we lost our fur, the sun's ultraviolet rays damaged our newly exposed skin, which reacted by producing melanin, a pigment that absorbs the sun's solar radiation, explain anthropologists at Penn State.

Ground - level ozone, which is distinct from the ozone in the upper atmosphere that protects the planet from ultraviolet radiation, is harmful to human health, exacerbating asthma attacks and causing difficulty breathing.

Ozone, which protects us from harmful ultraviolet radiation here on Earth, forms when oxygen produced by photosynthetic organisms (like trees and phytoplankton) synthesizes in light.

As scientists widely recognize, paler complexions are a genetic adjustment to low light: People with dark skin have trouble manufacturing vitamin D from ultraviolet radiation in northern latitudes, which makes them more susceptible to serious bone deformities.

Ultraviolet radiation spices things up as well: It heats the grains and breaks up some of the molecules into reactive fragments, which in turn bond with other fragments to form new kinds of molecules.

Habitable - zone planets around M dwarfs are subject to erratic bursts of ultraviolet radiation, which would destroy biosignature molecules in an atmosphere.

Unlike ozone in the stratosphere, which benefits life on Earth by blocking ultraviolet radiation from the Sun, ground - level ozone can trigger a number of health problems.

They also tolerated periods of temperatures up to 41 °C and, separately, high ultraviolet radiation — which might come about from damage to the ozone layer.

Although ultraviolet radiation renders the viral genome unable to reproduce, the researchers found that these irradiated particles, which still contain tegument proteins and broken genomes, were sufficient to keep the virus awake.

On Titan, where solar ultraviolet radiation is much weaker and oxygen - bearing molecules are substantially less abundant, methane can last 10 million to 100 million years (which is still a short time in geologic terms).

Koyuncu discovered this when she infected isolated axons with a small number of virus particles, which would normally travel to the cell bodies and be silenced, while simultaneously exposing the cell bodies to a large number of inactivated virus particles that have been dosed with ultraviolet radiation (UV).

In addition, they must have been able to resist the biologically destructive ultraviolet radiation in sunlight, which was not absorbed by a layer of ozone as it is now.

These are the glowing remains of the stellar envelope of gas ejected during the AGB phase, which is ionised by ultraviolet radiation emitted by the central star.

Keep in mind that extremely energetic stars (those of types O through A) will blast their planets with high doses of ultraviolet radiation, which is detrimental to the evolution of life.

New research suggests the Sun might be headed towards a «grand minimum» of a centuries - long cycle, during which the Earth would receive much less ultraviolet radiation.

Massive stars emit a large amount of ultraviolet radiation that destroys the molecules and dust surrounding the star and creates ionized gas, which in turn impedes the star's growth process.

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.

The most important ionizing source is photoionization by solar ultraviolet radiation, which is produced in the outer layers of the solar atmosphere (i.e, the solar corona).

When gas falls toward the black hole at the center of the galaxy NGC 4151, the gas heats up and emits ultraviolet radiation, which in turn heats the ring - shaped dust cloud orbiting the black hole at a distance.

It contains a lot of ozone, which helps block much of the sun's biologically damaging ultraviolet radiation.

The formation of a stratosphere layer in a planet's atmosphere is attributed to «sunscreen» - like molecules, which absorb ultraviolet (UV) and visible radiation coming from the star and then release that energy as heat.

It has also been proposed that ultraviolet (UV) radiation, which varies more than other solar irradiance wavelengths, could amplify the solar influence on the global climate through interactions with the stratosphere and atmospheric ozone.

Hubble can observe ultraviolet radiation, which is blocked by the atmosphere and therefore unavailable to ground - based telescopes.

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.

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.

As the body's largest organ, skin plays a crucial role in protecting against oxidative stressors, such as ultraviolet radiation, ozone and chemicals, all of which contribute to aging and disease.

On the other hand both records have shown dramatic cooling in the stratosphere, where cooling is indeed expected due to increasing greenhouse gases and decreasing ozone (which heats the stratosphere due to its absorption of solar ultraviolet radiation).

Cooks In Clouds: GoSun's patented solar cooking technology absorbs a broad spectrum of radiation, including ultraviolet light, which can penetrate clouds when visible light can not.

An international research team says the ozone, which protects humans and other species from harmful ultraviolet radiation, is continuing to recover at the poles.

The solar erythemal ultraviolet (UV) radiation which is defined by the integral over the UV wavelengths of the irradiance multiplied by the erythemal action spectrum (refer to carcinogenesis effectiveness).

The Earth receives energy from the Sun in the form of visible light and ultraviolet radiation, which is then re-radiated away from the surface as thermal radiation in infrared wavelengths.