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Topic: UV

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	Ultraviolet - Wikipedia, the free encyclopedia
		UV radiation is often used in visible spectrophotometry to determine the existence of fluorescence a given sample.
		UV radiation is used extensively in the electronics industry because photolithography is used in the manufacture of semiconductors, integrated circuit components and printed circuit boards.
		UV detectors which are sensitive to UV light in any part of the spectrum respond to irradiation by sunlight and artificial light.
	en.wikipedia.org /wiki/Ultraviolet (2845 words)

	Ultraviolet - Wikipedia, the free encyclopedia
		Suntan lotion that partly blocks UV is widely available (often referred to as "sun block" or "sunscreen").
		Generally, UV disinfection is more effective for bacteria and virus, which have more exposed genetic material, than for larger pathogens which have outer coatings or that form cyst states (e.g., Giardia) that shield their DNA from the UV light.
		UV detectors are sensitive to most fires, including hydrocarbons, metals, sulfur, hydrogen, hydrazine, and ammonia.
	en.wikipedia.org /wiki/UV (2845 words)

	[No title]
		There seems to a correlation between melanomas and brief, intense exposures to UV (long before the cancer appears.) Melanoma incidence is definitely correlated with latitude, with twice as many deaths (relative to state population) in Florida or Texas as in Wisconsin or Montana, but this correlation need not imply a causal relationship.
		The artificial UV sources do not have the same spectrum as solar radiation, however, while the filtering experiments do not necessarily isolate all of the variables, even when climate and humidity are controlled by growing the plants in a greenhouse.
		Many experiments have been carried out to determine the response of various marine creatures to UV radiation; as with land plants the effects vary a great deal from one species to another, and it is difficult to draw general conclusions at this stage.
	zebu.uoregon.edu /text/UV (3588 words)

	UV Index (Site not responding. Last check: 2007-11-06)
		The greatest amount of UV is received in the late spring and early summers much less is received in the late fall and early winter.
		UV radiation exposure is implicated in the formation of non-melanoma and melanoma cancers.
		UV exposure is one of the risk factors in the development of cataracts.
	www.swamphen.net /wx/tutorials/uv.htm (3513 words)

	UV Light Technology - What is UV Light?
		UV-A, UV-B and UV-C light sources are employed depending upon the type of material to be processed, ie: adhesives, resins, coatings or inks.
		Ultra Violet (UV) light represents a section of the overall electromagnetic spectrum of light, extending from the blue end of the visible (400nm) to the x-ray region (100nm).
		UV-A 400nm-315nm: Often referred to as 'fllight', this is the longest wavelength region and lowest energy, it represents the largest portion of natural UV light.
	www.uv-light.co.uk /what_is_uv.html (937 words)

	EO Library: Ultraviolet Radiation Fact Sheet
		Ultraviolet (UV) radiation that reaches the Earth’s surface is in wavelengths between 290 and 400 nm (nanometers, or billionths of a meter).
		Yet UV radiation at different wavelengths differs in its effects, and we have to live with the harmful effects as well as the helpful ones.
		Radiation at the longer UV wavelengths of 320-400 nm, designated as UV-A, plays a helpful and essential role in formation of Vitamin D by the skin, and plays a harmful role in that it causes sunburn on human skin and cataracts in our eyes.
	earthobservatory.nasa.gov /Library/UVB (600 words)

	UV Disinfection of surfaces, liquids and air (Site not responding. Last check: 2007-11-06)
		The relative effectiveness of UV light wavelengths for this process is known as the germicidal action spectrum which peaks at a maximum wavelength of 265nm and is illustrated in Figure 1.
		Selection of UV light equipment for a particular purpose depends primarily on the UV light dosage necessary to achieve the required reduction in the number of specified micro-organism types.
		Conventional low pressure UV lamps are the most energy efficient source with approximately 40% of the electrical input power converted into UV-C light output at wavelength 254nm, which is close to the maximum for germicidal effect, see Figure 1.
	www.uv-light.co.uk /applications/disinfection/uv_disinfection.htm (695 words)

	UV Radiation
		Ultraviolet-B(UV-B) is a section of the UV spectrum, with wavelengths between 270 and 320nm.
		There appears to be a correlation between brief, high intensity exposures to UV and eventual appearance (as long as 10-20yrs!) of melanoma.
		One undisputed effect of long-term sun exposure is the premature aging of the skin due to both UV-A, UV-B and UV-C. Even careful tanning kills skin cells, damages DNA and causes permanent changes in skin connective tissue which leads to wrinkle formation in later life.
	www.nas.nasa.gov /About/Education/Ozone/radiation.html (1014 words)

	UV Lights
		UV air cleaners can help your family, students or employees live, work or study in healthier environment, especially if any of them suffer from allergy, asthma or another respiratory disease.
		The UFHO UV Air Cleaner is well suited for mounting singularly or in grid patterns along the interior walls of supply ducts or plenums to introduce UVC to the air-stream in adequate dosages.
		The UFHO UV Air Cleaner is an ideal choice for mounting close to the coil and drain pan areas to inhibit the growth of mold and mildew in these areas.
	www.atlantic-environmental.com /productdetail8.htm (559 words)

	TEMIS -- UV index and UV dose -- introduction
		Integration of the erythemal UV index, as derived from satellite observations, from sunrise to sunset, with a time step of 10 minutes.
		The latter is still a matter of investigation: different types of clouds absorb the UV radiation to a different degree.
		The UV dose is compute in time steps of 10 minutes and these values are summed to acquire the total erythemal UV dose for the day.
	www.temis.nl /uvradiation/info/uvdose.html (457 words)

	Erythemal UV Data
		Atmospheric ozone shields life at the surface from most of the UV-B and almost all of the UV-C. UV-A and UV-B are reduced by a small amount from Rayleigh scattering in the atmosphere.
		All forms of UV radiation are reduced by cloud cover.
		Single-wavelength UV irradiances for 305, 310, 320, and 380 nm.
	toms.gsfc.nasa.gov /ery_uv/ery_uv1.html (251 words)

	UV Hazards
		UV or ultraviolet lamps are used in biological safety cabinets, light boxes, and crosslinkers in some of our laboratories.
		One of the problems in working with UV radiation is that the symptoms of overexposure are not immediately felt so that persons exposed do not realize the hazard until after the damage is done.
		UV radiation is that radiation just outside the visible range, or under 400 nanometers (nm).
	www.richmond.edu /~mfarrell/labsafety/equipment/uvhaz.html (678 words)

	UV, Skylight and Haze Filters
		If you allow UV light to be recorded on the CCD, it is likely that your image will look bluish and the color casts may not be acceptable.
		UV and skylight filters are design to remove UV light (to some extend) and the bluish cast.
		Thus, UV is affected the most, followed by blue, followed by green and red, and the recorded images will be not very sharp and look hazy.
	www.cs.mtu.edu /~shene/DigiCam/User-Guide/filter/filter-UV.html (540 words)

	TEMIS -- UV index and UV dose -- introduction
		Small amounts of UV radiation are beneficial for people and essential in the production of vitamin D. UV radiation is also used to treat several diseases, including rickets, psoriasis and eczema.
		Sunburn and tanning are the best known acute effects of excessive UV radiation exposure; in the long term, UV radiation-induced degenerative changes in cells, fibrous tissue and blood vessels lead to premature skin ageing.
		Furthermore, a growing body of evidence suggests that environmental levels of UV radiation may enhance the risk of infectious diseases and limit the efficacy of vaccinations.
	www.temis.nl /uvradiation/info/uvhealth.html (982 words)

	UV cures all: an assortment of UV applications for print
		Their applications — and UV installations — prove that the technology is not simply all shine and no substance.
		Inert UV is said to provide efficient curing of UV ink, savings in photoinitiator, reduced UV-energy requirements by up to 75 percent, and perhaps most importantly, lower-temperature curing on heat-sensitive substrates.
		Its C1, C2 and C3 UV dryers are equipped with quartz-glass lamps and dichroic reflectors for high UV yield and low infrared radiation.
	americanprinter.com /press/other/printing_uv_cures (2843 words)

	Ozone Depletion FAQ Part IV: UV Radiation and its Effects
		At this wavelength 99% of the total UV is absorbed, so these represent large increases in a small number, and do not represent a health hazard; nevertheless these wavelengths play a disproportionately large role in skin carcinoma and plant damage.
		There seems to a correlation between melanomas and brief, intense exposures to UV (long before the cancer appears.) Melanoma incidence is correlated with latitude, with twice as many deaths (relative to state population) in Florida or Texas as in Wisconsin or Montana, [Wayne] but this correlation does not necessarily imply a causal relationship.
		Many experiments have been carried out to determine the response of various marine creatures to UV radiation; as with land plants the effects vary a great deal from one species to another, and it is not possible to draw general conclusions at this stage.
	www.faqs.org /faqs/ozone-depletion/uv (6001 words)

	USATODAY.com (Site not responding. Last check: 2007-11-06)
		The UV index - a measure of sunburn danger - was given a makeover in 2004..
		Although categories on the new Global UV index have been reorganized and relabeled, a UV index report of 6 represents the same intensity of radiation on both the old and new scales, even if 6 is called "Moderate" on the old scale and "High" on the new scale.
		An easy way to tell how much UV exposure you are getting is to look for your shadow: If your shadow is taller than you are (in the early morning and late afternoon), your UV exposure is likely to be low.
	www.usatoday.com /weather/wuv.htm (626 words)

	AccuHelp - The AccuWeather FAQ and Help Site (Site not responding. Last check: 2007-11-06)
		Ultraviolet (UV) Radiation is part of the invisible spectrum of light that reaches the Earth from the Sun.
		UV has been linked to sunburn, skin cancer, skin wrinkling and aging, cataracts and other ocular damage.
		National and regional UV Index maps are updated every hour using vibrantly colored bands, with an easy-to understand 5-category scale, ranging from 0 (minimum levels) to 10 or more (very high levels).
	www.accuweather.com /iwxpage/adc/help/pr_uv.htm (430 words)

	UV
		A UV Index reading of 7 to 9 means high risk of harm from unprotected sun exposure.
		Don't forget that water, sand, pavement, and grass reflect UV rays even under a tree, near a building, or beneath a shady umbrella.
		UV rays can pass through the holes and spaces of loosely knit fabrics.
	www.nsc.org /ehc/sunwise/UV.htm (767 words)

	March cover story: Sheetfed UV; American Printer, March 2004
		UV technology, however, is different enough from conventional litho that it has its own special considerations.
		UV jobs are printed on a 40-inch, eight-color Mitsubishi 3F-16 press with interdeck UV curing system, chamber/anilox coater and 12-ft. extended delivery.
		The presses are “full-time UV,” staffed to run 24 hours a day, six days a week, with jobs ranging from lenticular printing, signage and POP work on polystyrene and PVC to folding cartons on paperboard, as well as printing on holographic and foil substrates.
	americanprinter.com /press/sheetfed/printing_sheetfed_uv (2980 words)

	Films for UV Colour Photography
		If energy outside the UV range reaches the film, this would result in an image where the UV contribution is literally swamped by other spectral bands.
		Simultaneously, their lowered sensitivity to yellows and reds means the UV colour signature recorded on the film is less likely to be contaminated by the far red sideband of the filter.
		Using D1, UV sensitivity appears to be quite high, at least the level of Fuji RTP film and possibly higher.
	www.naturfotograf.com /uvfilms.html (1053 words)

	WHO \| Sunbeds, tanning and UV exposure
		The effects of UV on the eye include cataracts, pterygium (a white coloured growth over the cornea) and inflammation of the eye such as photokeratitis and photoconjunctivitis.
		Childhood exposure to UV and the number of times a child is burnt by UV, either from the sun or from sunbeds, are known to increase the risk of developing melanoma later in life.
		INTERSUN, the Global UV project, is a collaborative project between WHO, the United Nations Environment Programme, the World Meteorological Organization, the International Agency on Cancer Research and ICNIRP that aims to reduce the burden of disease resulting from exposure to UV radiation.
	www.who.int /mediacentre/factsheets/fs287/en (1871 words)

	FusionUV.com
		UV curing can enhance product appearance, reduce costs, and increase productivity in printing, decorating, bonding, or coating processes while virtually eliminating VOC's.
		Fusion provides UV lamps, cure systems, process designs and service for your application of UV cured inks, coatings, or adhesives.
		Our modular microwave- powered UV lamp technology is recognized for stability and long operational life.
	www.fusionuv.com (110 words)

	Ultraviolet plumage colors predict mate preferences in starlings (Site not responding. Last check: 2007-11-06)
		Preferences across UV+ and UV- treatments were not correlated (for the two possible comparisons it is arbitrary which female is designated A and B; using Monte Carlo simulation to select one female as A and one as B from each pair, the median P = 0.080 from 1000 randomly selected sets of eight).
		Of course, under UV conditions, some other variable that we did not measure (such as display rate) may predict female choice; the crucial result is that spectral reflectance within the human visible waveband did not.
		The fact that removal of the UV cues did not abolish preferences of females (i.e., to random levels) suggests that UV plumage cues are not used exclusively for species recognition.
	www.users.mis.net /~pthrush/lighting/upcpmps.html (2838 words)

	Hanova - UV Lamps, Ballasts, Lamp Housings, Turn-Key Systems
		Efficiency, reliability and simplicity are designed into every Hanovia UV curing system — systems that enjoy a worldwide reputation as cost effective equipment for curing a wide variety of photocurable products.
		All Hanovia UV curing systems are available with multiple lamps according to your production needs.
		It is ideal for 3D curing and for curing UV adhesives.
	www.hanovia-uv.com /convey.html (406 words)

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