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Ultraviolet radiation

Human exposure to filtered solar ultraviolet radiation

Human exposure to filtered solar ultraviolet radiation

... filtered ultraviolet radiation has been evaluated with a dosimetric spectrum evaluator in a glass enclosure to simulate a sun-room with glass roof and walls, in a greenhouse and in a small and large ...

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Measurement of reflected, total and diffuse solar erythemal ultraviolet radiation

Measurement of reflected, total and diffuse solar erythemal ultraviolet radiation

... cumulative ultraviolet (UV) exposure and the risk of melanoma increases with the number of sunburns, specially during ...of ultraviolet radiation may be used in the instruction of science students ...

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Assessment of ultraviolet radiation exposures in photobiological experiments

Assessment of ultraviolet radiation exposures in photobiological experiments

... The device with an overall size of 3 cm x 3 cm is based on four different dosimeter materials, namely, polysulphone, nalidixic acid, 8-methoxypsorolen and phenothiazine (Parisi and Wong, 1996a). Each of the materials is ...

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Reducing human exposure to solar ultraviolet radiation

Reducing human exposure to solar ultraviolet radiation

... solar ultraviolet radiation may not provide the expected degree of reduction in exposures with resultant undesirable effects which could be ...ambient radiation on the forehead ...ambient ...

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Physics concepts of solar ultraviolet radiation by distance education

Physics concepts of solar ultraviolet radiation by distance education

... UV radiation. The measurement of ultraviolet radiation will be used in the instruction of distance education students in the physics concepts associated with measurement, the electromagnetic ...

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Ultraviolet radiation albedo and reflectance in review: the influence to ultraviolet exposure in occupational settings

Ultraviolet radiation albedo and reflectance in review: the influence to ultraviolet exposure in occupational settings

... in ultraviolet radiation that the following metals or elements were investigated and characterised for UV reflectance by Hulburt [52]: aluminium, antimony, bismuth, cadmium, carbon, carborundum, chromium, ...

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Diffuse component of solar ultraviolet radiation in tree shade

Diffuse component of solar ultraviolet radiation in tree shade

... direct radiation and diffuse ...diffuse radiation may constitute a significant component to the UV exposure received by humans’ eyes and skin as it is incident from all directions and difficult to minimise ...

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A SURVEY ON ULTRAVIOLET RADIATION AND OZONE RESEARCH

A SURVEY ON ULTRAVIOLET RADIATION AND OZONE RESEARCH

... Ozone the important but minor species of the normal air plays a very important role in atmospheric chemistry by protecting living organisms from the harmful effects of solar ultraviolet radiation. Ozone is ...

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Ultraviolet Radiation: A Hazard to Children and Adolescents

Ultraviolet Radiation: A Hazard to Children and Adolescents

... Ultraviolet radiation (UVR) causes the 3 major forms of skin cancer: basal cell carcinoma; squamous cell carcinoma; and cutaneous malig- nant melanoma. Public awareness of the risk is not optimal, overall ...

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Home workers and ultraviolet radiation exposure

Home workers and ultraviolet radiation exposure

... Excessive repeated exposure to UV is known to cause skin cancer in humans (Diffey, 1992). Human occupational exposure to ultraviolet radiation has been previously measured using polysulphone dosimeters ...

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A METHOD FOR TREATING WHEAT POLLEN WITH ULTRAVIOLET RADIATION FOR GENETIC EXPERIMENTS

A METHOD FOR TREATING WHEAT POLLEN WITH ULTRAVIOLET RADIATION FOR GENETIC EXPERIMENTS

... A prepared wheat spike with bare receptive stigmas is inserted into the bottom of the quartz tube, where ultraviolet radiation is negligible, and a dehiscing anther is [r] ...

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Ultraviolet Radiation: A Hazard to Children and Adolescents

Ultraviolet Radiation: A Hazard to Children and Adolescents

... sun’s ultraviolet rays can be hazardous, however, because excessive exposure causes skin cancer and other adverse health ...year. Ultraviolet radiation (UVR) causes the 3 major forms of skin cancer: ...

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Umbrella with Ultraviolet Radiation  Protection

Umbrella with Ultraviolet Radiation Protection

... Ultraviolet radiation (UVR) is an electromagnetic wave [1] [2]. It is originated from the sun and travels to the surface of the Earth. While UVR is vital to human, it can also cause harm especially to the ...

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Degradation of Sucralose by Peroxidation Assisted with Ultraviolet Radiation and Photo-Fenton

Degradation of Sucralose by Peroxidation Assisted with Ultraviolet Radiation and Photo-Fenton

... Abstract—Substances discharged intobodies of water must be studied due to possible risk of contamination and consequent damage to nature and human health.Sucralose is an artificial sweetener widely used to produce diet ...

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Ozone and ultraviolet radiation

Ozone and ultraviolet radiation

... Imagine if the earth’s protective atmosphere did not exist and the earth was subjected to the harmful ultraviolet energy from the sun. Life as we know would not exist. Changes in the earth’s layer of atmospheric ...

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Ultraviolet radiation as disinfection for fish surgical tools

Ultraviolet radiation as disinfection for fish surgical tools

... UV radiation (that it requires direct contact with the tool surface) might limit its practical use in medicine as a high-level disinfectant but under certain situations it is a viable tool for fish biologists when ...

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An Overview Of The Water Disinfection With Ultraviolet Radiation Nowadays: New Approaches

An Overview Of The Water Disinfection With Ultraviolet Radiation Nowadays: New Approaches

... Low pressure mercury discharge lamps (the most common type used in small scale systems are similar in design and construction to fluorescent lamps) emit a wavelength of 254 nm, which has been found to be a good source of ...

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Ultraviolet radiation

Ultraviolet radiation

... The risk of developing skin cancer or sun-related eye disorders may be lowered by the reduction of human exposures to solar ultraviolet (UV) radiation. There are also other determining factors such as ...

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Spatiotemporal exposure modeling of ambient erythemal ultraviolet radiation

Spatiotemporal exposure modeling of ambient erythemal ultraviolet radiation

... UV-B radiation averaged from 1974 to 1987, created using altitude, cloud cover, and ...solar radiation (also referred to as global horizontal irradiance [GHI] [12]), incorporating 1 km elevation and the ...

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The behaviour of Rhizobium bacteriophages during and after exposure to ultraviolet radiation

The behaviour of Rhizobium bacteriophages during and after exposure to ultraviolet radiation

... Luria & Delbruck (1942), who used one bacterial host susceptible to two different phages, found that irradiated preparations of one phage could slow the multiplication o[r] ...

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