Tag: "ozone" at biology news
Water Recycling Project Tested in Turkey Plant
...incomingwater, the processors adjust the amount of ozone
to maximize bacterial destruction,Baldwin said. A...t level ofozone usage would be most efficient. The ozone
generator used in the unitcreates ozone
at just the rate needed. The process immediately uses up the...
NCAR Scientists Trek To Africa For Biosphere-Atmosphere Chemistry Study
... nitrogen, which interact with sunlight to produce ozone
and other smoglike products--often at levels appro...r city. Satellite pictures show that the plumes of ozone
stretch, at times, as far as South America. NCAR scientists have made several trips to Africa in the...
Antarctic Science Season Gears Up With Searches for Meteorites, Neutrinos, and New Life Forms
...t of ultraviolet light (called UV-B) let in by the ozone
hole reduces the productivity of marine phytoplankton, but how does UV-B affect Antarctica's terrestrial plants? How are such plants reacting to the 50-year warming trend around the Antarctic Peninsula? Thomas Day of the University of Arizona and h...
Scientists Trek to Africa for Biosphere-Atmosphere Chemistry Study
...iding a comprehensive look at sources and sinks of ozone
and other oxidants in the tropics," says Cliff Jac... nitrogen, which interact with sunlight to produce ozone
and other smoglike products -- often at levels approaching those of a high-pollution day in a major ...
Plants Need Vitamin C, Too
...nuous environmental factors such as high levels of ozone
and ultraviolet light. "We grew our Arabidopsis thaliana plants in elevated levels of ozone. For a normal plant, this is not a problem. They naturally detoxify themselves to get rid of the free radicals," said Robert L. Last, plant molecular bio...
Ozone 'Chat Room' Provides Real-Time Air-Quality Research
...le to make inferences about the regional nature of ozone
and its long-range transport. These findings better clarify the understanding of ozone
and will affect regulations on industry and ultimately citizens. People in communities with unaccep...
Banning Chemicals To Protect Ozone May Aggravate Global Warming
...me of the chemicals being phased out to protectthe ozone
layer offer offsetting benefits, such as reducing ... says. "By independently addressing the issues of ozone
depletion and globalwarming, we are jeopardizing desirable options for one effect based on lesser-- ...
Biogenic Emissions Higher Than Expected Over African Savanna
...n the presence of sunlight to produce low-altitude ozone
and other smog-like products. Satellite pictures show that the plumes of ozone
stretch, at times, as far as South America. While stratospheric ozone
shields us from ultraviolet r...
Guidelines For Next Generation Of Environmental Policy
...Professor Esty. Today's environmental threats -- ozone
layerdepletion, global warming and endocrine disrupters, for example -- are lessvisible, more subtle and more difficult to address than the black skies ororange rivers of a generation ago. "Like nature itself, environmental problems constantl...
Even Moderate Air Pollution Reaching Eastern Wilderness Decreases Mountain Hikers' Lung Function
...mountain wilderness, periods of moderate levels of ozone
--the main ingredient of urban smog -- can decreas... The researchers said their two-year study showed ozone
levels common tonon-urban parts of the United States were associated with decreases in lungfunction ...
At Life's Most Sensitive Stage, Embryos Cope With Stress
...ltraviolet light from the sun,thanks to a thinning ozone
layer. When frog eggs are exposed to ultraviolet-B radiation, the light damages theembryos1 DNA. The damage can cause mutations and can kill embryonic cells, butthe embryo has a well-developed rescue mechanism, based on the work of a DNArepair enzym...
Phase Out Planned For One Of Top Five U.S. Pesticides, Plant Doctors Respond
... has some promiseand has not been implicated as an ozone
depletor) Development of plant varieties resistant...authoredby Ristaino and Thomas, highlights the key ozone
depletion mechanismsof methyl bromide and how its loss will impact the agriculturalindustry. Other d...
Amphibian Mortality Due To UV Radiation
...ns. The earth is shielded from UV radiationby the ozone
layer, which is believed to be thinning because of...es. "The recent thinning of the protective ozone
layer in the upperatmosphere has been linked to increased risks of skin cancer and cataracts in huma...
Over 4700 Technical Sessions Will Reveal New Findings At National Chemists' Meeting In Dallas, March 29 - April 2
...nds in the aquatic environment Causes of smog & ozone
in major world cities, such as Paris, Mexico City andJohannesburg The role of atmospheric chemistry in the global warming debate Beef flavor and fat composition: pasture-fed v. grain-fed cattle Community service as a chemistry degree requir...
Smog Spreading To South Pacific
... the southern hemisphere, resulting intropospheric ozone
levels near remote islands that would "trigger a f...ricchemistry. The report identifying tropospheric ozone
as a "major atmosphericproblem for the 21st century" came today in Dallas at the national meeting of...
At Last, Zoologists May Know What Is Killing The World's Amphibians
...tion penetrating the atmosphere due to the thinned ozone
layer oragricultural chemicals. "Many factors could be at work, but the fungus isprobably right up there," says Pessier. Nobody knows where the fungus came from, or how it is spread (seebelow). It was first noticed by Don Nichols, a colleague...
Atmospheric Chemistry -- A Mysterious Isotope Effect In A Well-Known AtmosphericPollutant Discovered
...of thisso-called mass-independent fractionation is ozone
formation, in which 17O and18O are enriched almost equally (rather than in a 1:2 ratio). In the July24,vol.281, 1998 issue of "Science", T. Röckmann, C.A.M. Brenninkmeijer, G.Saueressig, P. Bergamaschi, J.N. Crowley, H. Fischer and P.J. Crutzen,...
Study Suggests Weekly Hurricane And Rainfall Patterns Are Linked To East Coast
...ee different data sets --daily carbon monoxide and ozone
measurements from a Canadian monitoring stationon Sable Island off the coast of Nova Scotia, daily satellite-derived rainfalldata for the Atlantic Ocean, and databases of coastal Atlantic hurricanemeasurements. In each case, when the two ASU scienti...
Blacks' Environmental Concerns Equal/Exceed Whites'
...whites, saidthat global issues, such as acid rain, ozone
depletion, and global warming, wereone of the most important environmental problems facing the nation. On issues involving nature preservation, including oil spills and the loss ofwildlife habitats, Mohai and Bryant found no statistically significant...
Research Answers Burning Questions About Pollution
...ncern because it can damage the Earth's protective ozone
layer, Laurendeau says. "In our latest work, we measured the amount of nitric oxide produced in spray flames, a process where liquid fuel sprays through a small hole to form droplets, which are then ignited," Laurendeau says. "This is the b...
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