Tag: "ozone" at biology news

Amphibians in losing race with environmental change

...in today's sunlight, due to erosion of the Earth's ozone layer, is causing mutations, impaired immune systems and slower growth rates. Through evolution, amphibians were able to adapt to changing UV-B levels in the past, but the current change has occurred too rapidly. In the past, water was reasonabl...

Grape expectations for healthier wine

A new technique that uses ozone to preserve grapes could help prevent allergies an... micro liters per liter of ozone. They found that ozone treatment was 90% as effective as SO2 at preventing decay. In addition, ozone-treated grapes had up...

Ethanol vehicles pose a significant risk to human health, study finds

...n estimates that 800,000 people die each year from ozone and other chemicals in smog. ''In our study, E8...ueled vehicles in 2020.'' The study showed that ozone increases in Los Angeles and the northeastern United States will be partially offset by decreases in...

In presence of fragrant cleaning products, air purifiers that emit ozone can dirty the air

...ir purifiers that produce even small quantities of ozone may actually make the air dirtier when used at the...es, scientists found. Certain ionic purifiers emit ozone as a byproduct of ionization used for charging airborne particles and electrostatically attracting t...

Record ozone loss during 2006 over South Pole

... made by ESA's Envisat satellite have revealed the ozone loss of 40 million tons on 2 October 2006 has exceeded the record ozone loss of about 39 million tons for 2000. Ozone loss is derived by measuring the area and the depth ...

NASA study: Alaskan fires affected Houston air quality in 2004

...adian forest fires as much as doubled ground-level ozone thousands of miles away in Houston during a two-da...paraiso University and Rice University, found that ozone pollution levels increased significantly in the air above Houston on July 19-20, 2004. Researchers a...

Eco-friendly bug sucker

...st pesticides, and may complete the phasing out of ozone depleting methyl bromide. In 1997 160 governments promised to phase out its use by 2005 as part of the Montreal Protocol, but some exceptions were granted for the food and farming industries. "The initial hardware cost of an MSDD system is higher th...

Record air pollution above the Arctic

...arch (NILU) found extremely high concentrations of ozone above ground. With more than 160 micrograms ozone per cubic metre, these values are the highest measured since the foundation of the research base in ...

UCI scientists find chlorine may contribute to ozone formation

...uld be responsible for 10 percent or more of daily ozone production in local air, research at UC Irvine has...ve to eight parts per billion of the maximum daily ozone level, which in California typically ranges between 40 and 80 parts per billion. "Chlorine chemistr...

Food-crop yields in future greenhouse-gas conditions lower than expected

...ty in the world to test both the effects of future ozone and CO2 levels on crops in the open air. Older, c...sparent field chambers, in which carbon dioxide or ozone were easily retained and controlled. Such tests provided projections for maize, rice, sorghum, soyb...

Many cleaners, air fresheners may pose health risks when used indoors

...llutants formed when some of the products mix with ozone ?may exceed regulatory guidelines when a large sur...ls in consumer products that contribute to outdoor ozone formation. However, now we've learned that we need to pay attention to other aspects of pollution so...

Atmospheric ozone recovering in mid-latitudes, report shows

Concentrations of atmospheric ozone -- which protects Earth from the sun's ultraviolet...ommunity think it will be at least 50 years before ozone levels return to the pre-1980 levels when ozone began to decline." The research results will be pub...

Scientists find Antarctic ozone hole to recover later than expected

...om NASA and other agencies have concluded that the ozone hole over the Antarctic will recover around 2068, ...ath-based computer model, to predict the timing of ozone hole recovery. Their findings will be published tomorrow in Geophysical Research Letters. The Anta...

Alternatives to the use of nitrate as a fertiliser

...e contamination of water or the degradation of the ozone layer. There are also health problems such as deficiencies in the oxygenation of blood in breast-feeding mothers or the accumulation of nitrosamines, substances that are said to be cancerous, in the adult stomach. This is why it is necessary to find ...

Free access to a digital library for developing countries

...ound water con-tamination and the depletion of the ozone layer. "Helping to improve access to environment, health and nutrition information in developing countries is a matter of course for us. We already participate enthusiastically in projects such as AGORA and HINARI. I would like to congratulate eve...

NASA's AURA satellite peers into Earth's ozone hole

...e agency's AURA satellite, determined the seasonal ozone hole that developed over Antarctica this year is s...s 2005 assessment of the size and thickness of the ozone layer was the first based on observations from the Ozone Monitoring Instrument on the agency's Aura ...

Breath of the dragon: ERS-2 and Envisat reveal impact of economic growth on China's air quality

...ields the amounts and distribution of trace gases, ozone and related chemicals, clouds and dust particles throughout the atmosphere. With a 960-km swath and alternate limb and nadir observations, SCIAMACHY covers the entire world every six days at the equator and more often at high latitudes. This versat...

NCAR analysis shows widespread pollution from 2004 wildfires

...creased atmospheric concentrations of ground-level ozone across much of the Northern Hemisphere. The NCAR ...e of the wildfires, ground-level concentrations of ozone increased by 25% or more in parts of the northern continental United States and by 10% as far away a...

Tiny avalanche photodiodes target bioterrorism agents

...n this region, the UV light is filtered out by the ozone layer providing for a naturally low background signal. Solar-blind APDs are intrinsically able to take advantage of this low background level, while PMTs must use external filters to become solar-blind. This makes secure battlefield communication pos...

A radical solution for environmental pollution

...lzheimer's and cancer, and even destruction of the ozone layer---aren't all bad, Marsh said. Many essential chemical reactions occurring in living organisms involve enzymes that use radicals. In the work described in the JACS paper, Marsh and Qiao investigated the chemical reactions that allow the bacteriu...

1 2