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Tag: "air" at biology news

Scientists reveal the shape of a protein that helps retroviruses break into cells

...ould have been the same as it is today in the thin air at 17,400 feet, higher than any permanent human habitation. That means even animals at sea level would have been oxygen challenged. Huey and UW paleontologist Peter Ward are authors of a paper detailing the work, published in the April 15 edition of...

Currents could disrupt ocean food chain

...-generated carbon dioxide could increase water and air temperatures and decrease salinity in the North Atlantic at a rate significant enough to prevent the sinking and ultimate mixing of the water. That would not only disrupt the Atlantic Conveyer current, Schmittner said, it would prevent nutrient-rich ...

New strategies to reduce hospital-aquired infections

... separate from the main water stream and spread by air currents in all directions. Some of these contaminants are inhaled as aerosols (tiny water droplets containing microbes) or condensed on surfaces where they can be touched. Many of the bacteria found in biofilm, such as legionella pneumophila, are e...

Distributed Basic Local Alignment Search Toolkit (W.ND-BLAST)

... separate from the main water stream and spread by air currents in all directions. Some of these contaminants are inhaled as aerosols (tiny water droplets containing microbes) or condensed on surfaces where they can be touched. Many of the bacteria found in biofilm, such as legionella pneumophila, are e...

A probe, not an echo

...nly -- from the flood of electronic signals on the air at any given time. When the transducer captures the signal, it is processed with advanced signal processing algorithms, specially developed by Marmarelis' group, to form the multi-band images. Different kinds of tissue allow slightly more, or slight...

Atmosphere may cleanse itself better than previously thought

...sly thought to produce substances that "scrub" the air of smog. This group of chemicals, after absorbing ...een known to behave in this way ?producing natural air cleaners called OH radicals ?the chemicals the team studied have for the first time been observed to...

Aircraft Cabin Ventilation Influences The Transmission Of Diseases In-flight

... at the transmission of diseases during commercial air travel. They found that while commercial airlines ... the concentration of airborne organisms, with one air exchange removing 63% of airborne organisms suspended in that particular space. Computer models of d...

Researchers reveal secrets of flying snakes

...es control of its flight by undulating through the air in a distinctive S-shape as if swimming ?moving the tail up and down and side-to-side. While gliding, these snakes make turns up to 90 degrees and always seemed to land without injury. The researchers now are looking more closely at the aerodynamic ...

UN: World in big ecological mess

...pporting life on Earth, such as fresh water, clean air or a relatively stable climate, are being degraded...xamined ?including fresh water, capture fisheries, air and water regulation, and regulation of regional climate, natural hazards and pests ?increases the l...

Researchers make headway in mystery of migraines

...n of electrical signals along nerve cells. Like an air conditioner in the heat of summer, the sodium pump is a massive energy hog, consuming around 30% of the energy produced by the cell in order to perform this vital cellular process. Of particular interest in this study is that some mutations cause mi...

Study shows humans have ability to track odors, much like bloodhounds

...k with an artificial septum that provided separate air flow to each nostril. In addition, they conducted...imental set-up, with a mask that provides separate air flow to each nostril, is artificial. How behaviorally relevant is that?" said Porter. Subsequent exp...

Fluorescing lab worms signal longer life spans

...at separates them into groups with short pulses of air was used during the study. One of only six such instruments in the United States, the machine can sort about 30 worms per second, Johnson said. Genetic testing on both the bright and dim worms revealed that the levels of the green fluorescent protei...

Sandia completes depleted uranium study

...ct, DU particulate is dispersed in the surrounding air both within and outside the targeted vehicle and suspended particulate may be inhaled or ingested. Concerns have been raised that exposure to uranium particulate could have serious health problems including leukemia, cancers, and neurocognitive effec...

OHSU research shows vitamin C counteracts some negative impacts of smoking on unborn babies

... to smoking mothers often suffer from reduced lung air flow. To conduct this research, scientists studie...als exposed to nicotine prior to birth had reduced air flow in the lungs compared to animals that were given nicotine and vitamin C. In fact, the nicotine ...

Millennium Ecosystem Assessment: Many of 2 billion dryland dwellers at risk as land degrades

...ect much of China, Korea and Japan and even reduce air quality over North America, according to Ecosystems and Human Well-Being: Desertification Synthesis. The report is based on information generated for the Millennium Ecosystem Assessment (MA), a $22 million, four-year global study by 1,300 experts fro...

Hybrid grass may prove to be valuable fuel source

...only as much carbon dioxide as it removes from the air as it grows, said Heaton, who is seeking a doctorate in crop sciences. That balance means there is no net effect on atmospheric carbon dioxide levels, which is not the case with fossil fuels, she said. Miscanthus also is a very efficient fuel, becau...

Researchers identify new catfish family

...one structure of the skull and in the shape of the air bladder. "The ictalurids all have these big jaw muscles that come up over the top and anchor on top of the head" Hendrickson said. "This has a very narrow cranium and the muscles anchor to the sides of the bone instead of coming up on top. That and ...

Industrial contaminants spread by seabirds in High Arctic, new Canadian study shows

...ollutants. However, chemicals are emitted into the air and oceans from the populated parts of the globe, and are transported by air and ocean currents toward cold areas like the Arctic. "Some chemicals will build up in the food web...

Envisat and ERS-2 reveal hidden side of Hurricane Rita

...tion combine strong updrafts and outflows of moist air at higher altitudes, with energy released as rainy thunderstorms. Envisat carries both optical and radar instruments, enabling researchers to observe high-atmosphere cloud structure and pressure in the visible and infrared spectrum, while at the sa...

Study: Predatory dinosaurs had bird-like pulmonary system

...asts boasted a much bigger, more complex system of air sacs similar to that in today's birds. The finding...cause of their unusual pulmonary system. Pulmonary air sacs prompt air to pass through the lungs twice during ventilation. This system also creates holes i...

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