Tag: "ultraviolet" at biology news

Fact sheet: the Report on Carcinogens - 9th edition

...posure to sunlamps and sunbeds - Exposure to solar ultraviolet radiation, sunlamps, or sunbeds is listed as a "known human carcinogen." The Report cites data that indicate a causal relationship between exposure to solar radiation and melanoma and other skin cancers in humans, and that exposure to sunlamps or su...

Arctic ozone depletion linked to longevity of polar stratospheric clouds, according to studies

... shields life on Earth from the harmful effects of ultraviolet radiation. Toon is the co-project scientist in charge of NASA's DC-8 aircraft that made about 25 flights over the region last winter. Six CU faculty members and four graduate students worked with scientists from several other Colorado institutio...

Research to give authorities new tool in tracking terrorists

...oved method uses liquid chomatography coupled with ultraviolet light detection, with the liquid chromatography separating the explosive from the other compounds and the UV detection identifying the explosive. The new technique improves on this method using atmospheric pressure ionization -- mass spectometry to d...

NSF-funded researchers discover evidence of microscopic life at the South Pole

...microbes may be able to survive the heavy doses of ultraviolet radiation and the extreme cold and darkness of the South Pole. The team's findings, published in Applied and Environmental Microbiology, the journal of the American Society for Microbiology, indicate that a population of active bacteria, some of whi...

USGS diagnoses causes of many US amphibian die-offs

...orldwide declines, including increased exposure to ultraviolet radiation due to ozone thinning, the spread of non-native predators, contamination from pesticides and other chemicals, and rising temperatures. Many biologists suspect a combination of factors may be responsible. At the Cottonwood Lake Study Area, ...

Wisconsin lake study shows persistence of acid rain effects

...ke became almost crystal clear in the process, and ultraviolet light penetration increased, he says. Chemical changes helped a long, filamentous algae nicknamed "elephant snot" to spread across the lake bottom. Mercury in fish increased with acidification, but study of the lake's recovery has shown that mercur...

Effects of ozone pollution threaten agricultural production on Long Island, NY, says Cornell plant pathologist

...s a shield against the harmful effects of the suns ultraviolet light. Ozone pollution occurs when abnormally hig...gs over the island. Combine that with the intense ultraviolet rays and the greater New York City pollutants in the air, and you have a recipe for a lot of high oz...

New class of supramolecular complexes bind to DNA

...ramolecular complexes absorbs light throughout the ultraviolet and visible range, a property that the researchers hope to exploit to further study their interactions with DNA. "Where the complexes absorb light may change upon DNA binding," Milkevitch says. A poster by Milkevitch, Winkel, and chemistry profe...

Scientists pinpoint mechanism for UV damage to rice plants

... all plants, is exposed daily to the sun's harmful ultraviolet (UV) rays. Most plants have enzymes that are activated by ordinary light to repair UV damage. But Norin 1, an excellent breeding strain with good taste characteristics that was used to generate many commercially important strains in Japan, was shown ...

Tiny polymer patterns might act as glue in 'biochips'

... that allow it to be formed into patterns by using ultraviolet light in a process called photolithography, which is used in the electronics industry to etch microcircuits. The plastic is applied to the surface of silicon chips as a film and covered with a patterned, stencil-like "photomask," which is opaque in s...

Major new initiative to resolve structure of protein families

...tron synchrotron that produces beams of x-rays and ultraviolet light for scientific research, which are a hundred million times brighter than those from the best x-ray tubes. This high brightness reduces the time required to collect a complete set of data for a single protein from what had once been months or e...

Life in extreme conditions

...ed such high protection, since nowhere on Earth is ultraviolet radiation strong enough to damage DNA so badly. However, severe desiccation can harm DNA just as much as UV radiation does-and the Antarctic is very dry, because all the water is frozen. "At the South Pole, the repair mechanisms make sense," says Car...

Wood dust, talc, estrogens, and nickel alloys among substances being reviewed for inclusion in Report on Carcinogens

...r substances to be reviewed include broad spectrum ultraviolet light, as well as UVA, UVB, and UVC, the flavoring...listing in the "known" category. Broad spectrum ultraviolet radiation whether from the sun or from lamps and sunbeds is being reviewed for listing in the 10th ...

Voyage of the space veggies

...etic spectrum not normally used by plants, such as ultraviolet or infrared, and convert them to useful wavelengths. Or there might be some way to fuel these devices by providing energy through something other than light, such as chemical or electrical means. It depends on what's available. Bionic plants could ev...

Advisory panel on federal report on carcinogens makes recommendations to NIEHS/NTP for new listings

...d dust routinely in their jobs. -- Broad spectrum ultraviolet (UV) radiation from sunlight or artificial sources. However, the individual classes UVA, UVB and UVC were recommended for listing in the different category of "reasonably anticipated to be human carcinogens" because of difficulties in separating ove...

Atmospheric chemistry key to global and local air pollution

...ect life from the detrimental effects of the sun's ultraviolet radiation. At ground level, it is a pollutant implicated in respiratory problems and eye irritation. Sunlight breaks ozone apart resulting in the creation of the very reactive hydroxyl radical which begins the process that removes some pollutants fro...

Atmospheric aerosols impact on smog formation being reassessed

... colleagues used the SCOS 97 measurements of solar ultraviolet irradiance, taken at two stations in Riverside and Mount Wilson, to compute the atmosphere's total optical depth. As a measure of the transparency of the atmosphere to the penetration of sunlight, optical depth is very influential in determining sola...

Plants as plants: gene could convert crops to plastics factories

...s that help protect them from insects, disease and ultraviolet radiation in sunlight. They do this by combining (or to use the scientists preferred term, conjugating) the molecules with other molecules to produce stable, soluble forms of the compound that are stored in small structures, called vacuoles, within t...

Dried cells, tissues could solve biological materials storage, transport problems

...hat protects the cells from heat, desiccation, and ultraviolet (UV) radiation. Potts and Helm have isolated genes involved in these responses for transfer to sensitive cells. They have dried mouse cells and, most recently, human kidney cells for as long as eight days. The cells are air dried at ambient roo...

Federal government makes final call for data, public comment before writing new report on cancer-causing substances

...nels voted unanimously to recommend broad spectrum ultraviolet radiation, whether from the sun or from artificial sources, be listed as a "known" human carcinogen. The lengths, UVA, UVB and UVC were each recommended for listing as "reasonably anticipated to be a human carcinogen." Methyleugenol. All thre...

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