Ultraviolet, and Ultrafiltration systems.

Constantly being bombarded with UV radiation.

So the integration by parts just tells us that the integral of uv prime is equal to uv minus the integral of

We used ultraviolet radiation to do that.

And the image on the right is an ultraviolet image.

look at what's happening to the ultraviolet radiation.

live in high UV areas.

live in low UV areas.

This is three minutes of UV light.

So if you are on the land,

All the wavelengths in the Lyman series are in the ultraviolet band.

Let's first look at the relationship of ultraviolet radiation to the Earth's surface.

So we used ultraviolet A, which doesn't make vitamin D.

Then all of a sudden, I started worrying about photosynthesis and the pH balance, and the UV radiation, and all this different stuff that would make my jalapeños grow.

And the good thing about perceiving ultraviolet is that you can hear if it's a good day or a bad day to sunbathe, because ultraviolet is a dangerous color, a color that can actually kill us, so I think we should all have this wish to perceive things that we cannot perceive.

Now, if we take the integral of both sides of this equation, we get uv is equal to the antiderivative of u prime v plus the antiderivative of uv prime.

We see this.

I'm just rewriting this. e to the minus st s.

looking at the equator, we were bombarded by high levels of ultraviolet radiation.

lots and lots of ultraviolet radiation and the melanin this wonderful, complex, ancient polymer compound in our skin served as a superb natural sunscreen.

In the winter, when you are skiing in the Alps, you may experience ultraviolet radiation.

Urge all data centres to develop procedures for the prompt submission of their ozone, UV, and ancillary ozone and climate related data to the World Ozone and Ultraviolet Data Centre (WOUDC).

Some of us with lightly pigmented skin live in high UV areas.

Some of us with darkly pigmented skin live in low UV areas.

These polarization detectors are sensitive in the ultraviolet region of the light spectrum.

Metal ion lasers are gas lasers that generate deep ultraviolet wavelengths.

They were studied with optical imaging, and through observations of occultations in ultraviolet and visible light.

It goes into the upper atmosphere, it actually reacts with the UV light to turn into ozone which then can help actually block the UV ligt.

So this seems to be a feature of ultraviolet rays hitting the skin.

And wouldn't it be great if we could somehow see what that is, I hear you ask.

And so what we did was we took a bunch of volunteers and we exposed them to ultraviolet light.

Where it protected the body against the degradations of ultraviolet radiation, the destruction, or damage to DNA, and the breakdown of a very important molecule called folate, which helps to fuel cell production, and reproduction in the body.

Conditions were significantly colder, but they were also less intense with respect to the ultraviolet regime.

The incrementally cooler colors blues, greens, yellows, and finally grays indicate areas of much lower ultraviolet radiation.

What's very, very important here is that the earliest humans evolved in high UV environments, in equatorial Africa.

National reports on existing and planned activities relating to ozone research and the monitoring, calibration and archiving of measurements and UV B monitoring and initiatives aimed at the prevention of UV B and sun related injuries.

Further, it is important that efforts be undertaken to transfer all ozone and UV data to the WOUDC, as well as to conduct re evaluations of historical data.

In those early days of our evolution, looking at the equator, we were bombarded by high levels of ultraviolet radiation.

The early universe Study better than ever before how concentrations of visible and ultraviolet light change over time.

Threats to health range from increased exposure to ultraviolet radiation to deterioration in food and water quality.

The depletion of the ozone layer lets more ultraviolet light from the sun down to the surface of the earth.

So it is constantly being bombarded with ultraviolet radiation from the sun which is very inhospitable to DNA and to life.

But the active irradiation, during the UV and for an hour after it, there is dilation of the blood vessels.

Between 1520 and 1867, 12 million, 500 people were moved from high UV to low UV areas in the transatlantic slave trade.

The new invention enabled the development of small, convenient and low priced blue, violet, and ultraviolet UV lasers, which had not been available before, and opened the way for applications such as high density HD DVD data storage and Blu ray discs.