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Tag: "mixes" at biology news

'Short-circuit' found in ocean circulation

... the overturning circulation - how water moves and mixes vertically - around Antarctica takes place just around the tip of South America and in the small region in the Atlantic south of the Falklands, called the Scotia Sea. Co-author Prof Andrew Watson, from the University of East Anglia’s School of En...

Helium helps patients breathe easier

...rate to severe COPD were each given four different mixes of gases including room air, while they exercised. During each test they were monitored for exercise time, breathing capacity, work of breathing and symptoms of exertion. The best results were achieved with a mix of 40 per cent oxygen and 60 per cent...

Vasectomy may put men at risk for type of dementia

...owever, the protective barrier is broken and semen mixes into the blood. The immune system recognizes the sperm as invading foreign agents and produces anti-sperm antibodies in 60 to 70 percent of men. Weintraub said these antibodies might cross the blood-brain-barrier and cause damage resulting in deme...

Scientists map air pollution using corn grown in US fields

...r understand where pollution is located and how it mixes and moves in the air. Tracking fossil-fuel-emitted carbon dioxide will be important as countries throughout the world adhere to the Kyoto Protocol, an agreement among nations to reduce greenhouse gas emissions. The United States signed the protocol, ...

Triple threat polymer captures and releases

...les and release them at room temperature. Wooley mixes two normally incompatible polymers -- a hyperbranched fluoropolymer and a linear polyethylene glycol -- and lets them phase-separate into distinct domains, one interspersed in the other. A chemical process called crosslinking then solidifies the mix...

Finding paves way for better treatment of autoimmune disease

...given the option, phospholipase D, which typically mixes with water, prefers alcohol. It's an apparently lethal choice for the signaling molecule that, in turn, also kills T cells that need phospholipase D to survive. Previously, it was unknown whether regulatory T cells required the molecule. "What we h...

Marine 'dead zone' off Oregon is spreading

... in oxygen upwells from the deep ocean off Oregon, mixes with oxygen-rich water near the surface, causes some phytoplankton growth and provides the basis for a thriving fishery and healthy marine food chain. During dead zone periods, some of the normal processes ?including wind and current conditions ?can ...

Secrets of the sea yield stronger artificial bone

...ollagen, which are both extremely weak. But nature mixes them together at room temperature and without toxic chemical to create something that is very tough -- this fascinates us." ...

New University of Toronto research a 'pore' excuse for engineering

...ups) with a surfactant -- essentially, a soap that mixes oil and water -- which causes the organosilica to self-assemble into a nanostructure. The scientists then washed away the surfactant to leave a nanoporous material. When they examined the thin film that remained, they discovered that it made an excel...

Poison + water = hydrogen. New microbial genome shows how

...consuming this normally poisonous gas, the microbe mixes it with water, producing hydrogen gas as waste. As the world increasingly considers hydrogen as a potential biofuel, technology could benefit from having the genomes of such microbes. " C. hydrogenoformans is one of the fastest-growing microbes t...

Novel protein complex enables survival in hostile environment

...fide-containing superheated water at 350 C (662 F) mixes with cold oxygen-containing water, creating cooler environments -- 48 to 94 C (118 to 200 F) -- where M. jannaschii can thrive. "This sulfide-oxygen mixture can also generate sulfite. Therefore, M. jannaschii experiences conditions that existed on ea...

Shampoo detergent added to paint makes surfaces self-sterilizing

...opant properties due to its being a detergent that mixes well with both aqueous and oil-based coatings," says Vermuelen. While they have shown that paints and varnishes can be made rapidly and inexpensively self-sterilizing, the group has yet to develop floor and furniture polishes that work. Students who...

Say what? Bacterial conversation stoppers

... V. cholerae, the cholera-causing bacteria that mixes with E. coli in human guts. When cholera bacteria sense a quorum, they turn off their toxins and excrete an enzyme to cut themselves loose from the intestine, so they can move out of the body where they can infect another person. Here, E. coli sq...

Grass makes environmentally friendly biofuel

...has made a comparison of wood pellets with various mixes of grasses and the BTUs (British Thermal Units) produced per pound. He has found that grass pellets can be burned without emissions problems, and they have 96 percent of the BTUs of wood pellets. He also notes that grass produces more ash than wood -...

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