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Tag: "above" at biology news

Yellowstone microbes fueled by hydrogen, according to U. of Colorado study

...bial communities in park featureswith temperatures above 158 degrees Fahrenheit. Photosynthesis is notknown to occur above that temperature.A combination of three different clues led researchers to conclude thathydrogen was...

Ice core 'dipstick' indicates West Antarctic ice has thinned less than believed

...tly rises 1,000 meters -- more than half a mile -- above a bedrock plateau. Some computer reconstructions indicate it was perhaps twice as thick at the end of the last ice age, also called the Last Glacial Maximum. But evidence from an ice core extracted near Siple Dome from 1997-99, along with other calc...

Falling ants glide back to trunk to avoid dangers of forest floor

...s and larvae in the canopy where they live, mostly above private land around the city. Using ropes and cave-climbing equipment, he ascends trees and collects mosquito larvae from water-filled tree cavities and also collects adult females who've had a recent meal of blood ?his own. He and Dudley are applyi...

World's largest rainforest drying experiment completes first phase

... by 6' clear plastic panels suspended 3 to 12 feet above the soil. The panels were removed during the five-...d, then the large trees that tower 130 to 150 feet above the ground, basking in full sunlight, begin to falter and die. The death of large trees ?trees that ...

New lab technique identifies high levels of pathogens in therapy pool

...many of them pathogenic, were enriched just inches above the pool's surface by as much as 60 percent. The microbes included "Mycobacterium avium," which can cause "lifeguard lung" and which was present in nine ill lifeguards who worked at the facility. The technique used in the study is 1,000 times more ...

Nanoparticles offer new hope for detection and treatment

...cles are a few thousand times smaller than the dot above this "i," yet each can carry about 100,000 molecules of the metal used to provide contrast in MRI images. This creates a high density of contrast agent, and when the particles bind to a specific area, that site glows brightly in MRI scans. In this s...

Scientists journey to southern Africa to unravel the secret world of elephant communication

...s and not hearing them, microphones were installed above ground so researchers could monitor all low frequency sounds in the air. "The results of our 2002 study showed us that elephants do indeed detect warning calls played through the ground," O'Connell-Rodwell observes. "We expected them to clump up into...

Africa to take it on chin again with climate change

...howers and thunderstorms develop in the rising air above the warming ocean, says Hurrell, they help lead to sinking air and drought in a surrounding ring that includes southern Africa. "In our models, the Indian Ocean shows very clear and dramatic warming into the future, which means more and more drought...

Study uncovers bacteria's worst enemy

...actinide contamination. Actinides are the elements above atomic number 89 and are usually radioactive. The ...lly toxic to bacteria only at high levels far, far above concentrations at contaminated sites, and that common toxic metals, such as cadmium, nickel, and chr...

Finding hidden invaders in a Hawaiian rain forest

... the forest canopy. Ginger cannot be detected from above the forest canopy using traditional aircraft or satellite approaches, but the new methods are sensitive to its high water content. In addition, the aircraft-based analysis discovered that ginger reduces the amount of nitrogen in the Metrosideros fore...

Low oxygen likely made Great Dying worse, greatly delayed recovery

...supercontinent called Pangea, and most of the land above sea level became uninhabitable because low oxygen made breathing too difficult for most organisms to survive, said Raymond Huey, a UW biology professor. What's more, in many cases nearby populations of the same species were cut off from each other b...

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

...supercontinent called Pangea, and most of the land above sea level became uninhabitable because low oxygen made breathing too difficult for most organisms to survive, said Raymond Huey, a UW biology professor. What's more, in many cases nearby populations of the same species were cut off from each other b...

Discovery clarifies role of peptide in biological clock

... that can be found on the bottom of the brain just above the roof of your mouth where your optic nerves cross. There are roughly 10,000 neurons in this nucleus on either side of your brain. The timekeeping mechanism in these cells depends on daily cycles in gene activity. Herzog found in his latest study ...

Bobbing birds do it for a reason

... North America--their eyes can be more than 5 feet above the ground--whooping cranes exhibit high-amplitude head movements during locomotion, making the measurement of the speed of the head relatively easy via non-invasive computer-video techniques. The cranes search both for mobile prey (frogs and insects...

A probe, not an echo

...t 250 nanosecond) of 4-12 megahertz frequency (far above human hearing) and picks up the pulse on the other side after it has traveled through the imaged object. The transmitted pulses come from an array of very small ultrasonic transducers of sub-millimeter dimensions. A parallel array of transducers on ...

Antiretroviral Therapy May Prevent HIV Transmission From Breastfeeding Mothers To Infants

... inhibitory concentrations of nevirapine that were above those thought necessary to protect against HIV infection. Dr. Shapiro and colleagues hypothesized that the presence of antiretroviral drugs in breast milk may reduce mother-to-child transmission through either direct inhibition of HIV replication in ...

The first impact factor for PLoS Biology ?13.9

...ure. An impact factor of 13.9 places PLoS Biology above such established journals as EMBO Journal, Current Biology, and the Proceedings of the National Academy of Sciences. In fact, in ISI's category of general biology journals, PLoS Biology is ranked number 1. PLoS Biology was launched in October 2003, ...

Researchers discover stem cell 'guide' that may be key for targeting neural stem cell treatments

...actory bulb, the "smell" part of the brain located above the sinus cavity. PK2 allows these new neurons to settle into the proper areas of the olfactory bulb, thus permitting these neurons to function normally. "Our findings identify one of the first endogenous guidance molecules for migrating neurons in ...

Deep thinking: Scientists sequence a cold-loving marine microbe

...ust adapt to extreme cold--in fact, it cannot live above room temperature. How does it cope in such freezing conditions?" Among cold-adapted bacteria, Colwellia species have a decidedly chilly comfort zone. The bacteria typically require temperatures less than 20° to grow. Scientists have found C. psychre...

Arthritis: What Wnt wrong?

...duced TNF-a, IL-1ß and IL-6 at levels 2- to 4-fold above controls. Importantly, this effect could be replic...of Wnt-7b in the inflammatory response of RA. The above findings identify a role for Wnt-7b in arthritic processes. Arthritic diseases manifest differently ...

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