However there are lots of commercial issues with a UV optical disc besides creating inexpensive devices to generate this wavelength of light.
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Nano bar codes are the molecular versions of traditional bar codes--metal nano-particles that have specific, recognizable chemical fingerprints that can be read by a machine, perhaps a UV lamp or optical microscope.
Only a limited number meet Food and Drug Administration standards for "Class 1" protection, in which 90% of UV-A radiation is blocked and 99% of UV-B radiation is blocked.
Some Class 2 lenses beat the standard: Avaira, for example, block at least 75% of UV-A radiation and 99% of UV-B radiation, according to the package insert.
The cells are encased in a clear, UV and scratch resistant coating.
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Furthermore, we believe the DVD (and broader optical disk) category has already entered a long-term decline (analogous with peak-to-trough decline of VHS and CD categories), caused by rapid growth in on-line streaming and a la carte rentals (though we admit that UV has been a bit of a disappointment, so far).
Xenex uses harmless xenon gas to blast a broad spectrum of UV wave- lengths in all of ten minutes.
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This would suggest that it takes less of a trigger, namely UV rays in sunlight, to make potentially harmful cellular changes in people with red hair.
Stibich showed that a high-energy form of UV called UV-C could kill C. diff, in either its active state or as a dormant spore protected by a tough seedlike shell.
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The results have a "double significance, " she said, since the reduced skin damage from UV rays also translates to a lower risk of skin cancer.
"All other things being equal, I would want the best UV protection in a lens, " says Jeffrey L. Weaver, executive director of the American Board of Optometry in St.
High pollen counts and - as you'd expect - high UV levels will be a feature on most days.
To the long list of great ideas gone bad, add the UV Waterworks--a simple, cheap device to purify filthy drinking water in poor countries.
The result is a material that is not only waterproof but is able to block out UV radiation from the sun to such an extent that it would rate a Ultraviolet Protection Factor (UPF) of 101.15 if the chart went that high.
Zech (The ADVENT Group of Colorado Springs, CO) noted optical storage technology expert, a new commercial optical storage technology using UV light would probably have to be in the 200 nm range and would provide storage capacities of over 100 GB in a single layer.
FORBES: What is the Future of Optical Disc Technology and who will Use It?
Orb-weaver spiders attract insects to their webs with ultraviolet (UV) decorations, according to a new study.
He called for an education campaign warning people of the risks of UV light and said there was a need to look at the access to salons and the regulation and use of the sunbeds.
The BMA has been campaigning against sunbed use since 2003, arguing that just one session a month doubled the average individual's annual dose of UV radiation.
Holick has a solution--limited direct exposure to the sun--that infuriates many dermatologists worried about the skin cancer risk. (A far better idea, they say: Take a supplement.) In 2004 he published his book The UV Advantage, touting the benefits of sun exposure, and was kicked out of the BU dermatology department, where he previously held a joint appointment.
Vitamin D is incorporated in the body when skin is exposed to sunlight of a certain wavelength but in the UK, during winter months, UV-B radiation can be insufficient to properly support vitamin D synthesis in the body.
UV-blocking contact lenses have been around for more than a decade, but have gained in popularity in recent years.
Dr. Costarelis advises his patients to eat a nutrient-rich diet and stay out of the sun, because UV rays damage hair.
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She peels back the note with a smile and, without even taking it out, scans my license under the UV light and lets me past.
Spending 88 days exposed to the sun might have seemed an odd way to raise awareness for melanoma, but Ridley, a redhead who admits he burns easily, stocked up on SPF 50 sunblock and UV protective clothing, and took breaks when the sun was the strongest.
The agency added that a lack of sunshine had also failed to improve the situation as the sun's UV rays would usually kill some of the bacteria found in the sea.
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It was also a big week for lighting news as we learned that compact fluorescent light bulbs emit potentially harmful UV radiation -- another good reason to make the switch to LEDs.
But the increased ultra-violet (UV) solar radiation which the damaged ozone allows through to the surface of the earth is a threat to all living things.
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