Sentences with phrase «ultraviolet radiation»
"Ultraviolet radiation" refers to a type of energy that comes from the sun. It is invisible to our eyes but can be harmful to our skin and eyes if we are exposed to too much of it. Full definition
Not only is ozone a greenhouse gas, it also protects us from damaging ultraviolet radiation from the sun, so its presence is important to us.
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They are caused by ultraviolet radiation from the sun.
The ozone layer is important, because it prevents harmful ultraviolet radiation from reaching the surface of the planet.
These ions result from the removal of electrons from atmospheric gases by solar ultraviolet radiation.
In humans, these cells function to protect skin from damaging environmental stresses such as ultraviolet radiation exposure.
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.
Before falling onto the white dwarf, this material forms a hot disc around the white dwarf and emits extreme ultraviolet radiation.
Some research has suggested that certain supplements can help decrease the effects of ultraviolet radiation on the skin.
It contains a lot of ozone, which helps block much of the sun's biologically damaging ultraviolet radiation.
Many of these planets, being so close to their star, are likely to be bombarded with ultraviolet radiation.
The UV index is a measurement of how much ultraviolet radiation is reaching a particular place at a given time.
A method that gives mice a tan without using ultraviolet radiation now works in human skin samples.
In addition, more ultraviolet radiation reaching the surface will have an effect on ecosystems and species as well as agriculture around the world.
The hot ultraviolet radiation heats the surrounding ice - cold dust, which then emits light in the far - infrared.
When water molecules rise high in an atmosphere, ultraviolet radiation split the water molecules into its component gases, oxygen and hydrogen, and the lighter hydrogen molecules escape into space.
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.
During the contraction a wave blast revealed by extreme ultraviolet radiation spreads away from the source of the flare.
(We know that solar ultraviolet radiation turn methane into tar).
We know now that the original assumption of constant sunlight and therefore constant ultraviolet radiation is incorrect.
This makes it perfect for the DIY who is concerned about the harmful effects of ultraviolet radiation on the skin.
What remained would have soaked up ultraviolet radiation from the sun.
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.
Vitamin E also helps in reducing the harmful effects of ultraviolet radiation on the skin.
They don't use ultraviolet radiation or any other harmful thing.
This layer has the highest concentration of ozone that absorbs much of the sun's damaging ultraviolet radiation, preventing it from reaching the surface and allowing life to exist.
In particular, astronomers would like to see the Milky Way's star - forming regions emit ultraviolet radiation known as Lyman alpha because it's expected to be both strong and a key diagnostic of conditions in stellar nurseries.
A nearby star features a comet - like tail that could be the outer reaches of a protoplanetary disk evaporating under the intense ultraviolet radiation from IRS 2.
When children follow the exciting superhero - inspired adventures of «Ray and the Sunbeatables,» learning how to protect themselves from dangerous ultraviolet radiation exposure is easy — and fun!
Such views suggest that tiny galaxies in the early universe played a crucial role in cosmic reionization — when ultraviolet radiation stripped electrons from hydrogen atoms in the cosmos.
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.
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.
His 25 - year - old Dobsonmeter calculated the thickness of the ozone layer by measuring ultraviolet radiation penetrating the atmosphere and it...
Higher levels of ultraviolet radiation penetrating the Earth's dwindling ozone layer may be driving some species of frogs to extinction, according to researchers from Oregon.
Ozone has played a major role in absorbing ultraviolet radiation from the sun, which would otherwise negatively impact life on earth.
Early Earth lacked an ozone layer to act as a shield against high - energy solar radiation, but microbes flourished by adapting to or finding other forms of protection from the higher ultraviolet radiation levels.
Although long - term melanoma survivors were more likely to report healthier levels of ultraviolet radiation exposure and sun protection behaviors than controls, some still reported indoor tanning or intentionally seeking sun to tan.
UV stands for UltraViolet radiation.
Frozen in ice under ultraviolet radiation, high vacuum and low temperature, the pyrimidine turned into uracil, cytosine and thymine, major components of earthly DNA and RNA.
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.
The observations, published online March 8 in the Astrophysical Journal Letters, could help astronomers learn more about an early period known as cosmic reionization, when ultraviolet radiation stripped electrons from hydrogen atoms.
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.
Scientists attributed both phenomena to pesticides, parasites, and increasing exposure — due to ozone loss — to a type of ultraviolet radiation called UV - B.
The Australian telescope was one of several payloads carried into space by the shuttle Endeavour to observe ultraviolet radiation from stars and galaxies.
Irradiation of the iodouracil chromophore with monochromatic, long - wavelength ultraviolet radiation (325 nanometers) eliminates excitation of other nucleic acid and protein chromophores.