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Radius in Biological News

AGU journal highlights -- Oct. 16, 2008

... slow earthquakes are represented as shear slip on circular faults whose radius is a random variable governed by specific parameters. His results show that varying the radius of these faults could explain differences in the behavior of slow slip ...

An easy way to find a needle in a haystack by removing the haystack

... from single and small-sized samples. "The analysis of a very small plant leaf sample from Arabidopsis thaliana , in fact a circle area with a radius of just about 0.5 millimeter, revealed over a hundred analyte peaks, among which 46 metabolites could be identified. Interestingly, among them were ...

UNH researchers track lobster migrations to improve population estimates

... where the lobsters go. These stations hold special ultrasonic receivers that can identify and record tagged lobsters moving within a 400-meter radius of the equipment. For example, receivers are currently located at the Great Bay Marina, the Shafmaster dock, the Public Service of New Hampshire ...

Hurricane Ike tracked by ESA's Envisat

... are made widely available on the SOPRANO ocean products demonstration website developed with ESA. "The knowledge of hurricane eye details, the radius of very high winds, details on the swell fields, and the new information on atmosphere feedback to ocean surface velocity will certainly help coupled ...

Let the cat keep chasing the mouse

... factor for wildcat habitat proved to be the distance to human settlements: "The shy forest-dwellers making a large loop around settlements. Within a radius of one kilometre from settlements they occur more rarely and even with individual houses or roads they still keep a distance of 200 meters", reports ...

Study results: new recommendations for grape growers

... a good indicator of the patterns of plant available water. After extensive trials, data indicated that soil sampling within a 20- to 40-centimeter radius of the drip line emitter best reflected the amount of water available to the plants. According to Davenport, the research will have multiple ...

New fish has a face even Dale Chihuly could love

... habits of fishes. Most fishes have eyes on either side of their head so that each eye sees something different. Only very few fishes have eyes whose radius of vision overlaps in front, providing binocular vision, a special attribute well developed in humans that provides the ability to accurately judge ...

Some migratory birds can't find success in urban areas, study finds

... was not related to urbanization. The researchers determined how urban a nest site was by measuring the percentage of land within a 1 kilometer radius that was covered by a building, parking lot, mowed lawn or other man-made surface. As other research has suggested, this study did find that urban ...

AGU journal highlights -- Feb. 26, 2008

... the bright yellow-orange light emitted by the sodium atoms in the tail. The authors find that the tail, previously detected out to 15 times the radius of Mercury, actually extends more than 100 times that distance, or 2.5 million kilometers (1.6 million miles) away from the planet. Further analysis ...

Into the abyss: Deep-sixing carbon

... 160 million tonnes of CO 2 the equivalent of 2.2 days of current global emissions. Now try to picture that container, measuring up to 100 metres in radius and several kilometres long, resting benignly on the seabed more than 3 kilometres below the oceans surface. At first blush, this might appear ...

'Heftier' atoms reduce friction at the nanoscale, study led by Penn researcher reveals

... crystal acts as an energy transfer medium, absorbing kinetic energy from the tip of the atomic force microscope. The tips were less than 50nm in radius at their ends. How much energy is absorbed is dependent, researchers found, on the adsorbates natural atomic vibration frequencies. The heavier an ...

Researchers view swimming tactics of tiny aquatic predators

... The Karlodinium appeared to slow down and wait to ambush its prey; the speedier Pfiesteria was a more active hunter, increasing its speed and radius of helical trajectories while pursuing its prey. Just like lions might shift into stealth mode when tracking a herd of impala on the African ...

Reconstructing the biology of extinct species: A new approach

... of each semicircular canal and calculating the radius of curvature. Most of the specimens were scanned ... significant statistical relationship between the radius of curvature of the semicircular canals and the ... have semicircular canals with a larger radius of curvature than do slower-moving ones. For ...

Warning from Asian bees

... for at least three months, it is unknown how many more swarms might exist and how far afield they may have flown. Within a one kilometre radius from the first colony, disturbed in the mast of a yacht undergoing repairs after two years docked at a wharf in Cairns, three more swarms were found ...

Antarctic icebergs -- Hotspots of ocean life

... melt. The researchers discovered that this process produces a “halo effect” with significantly increased phytoplankton, krill and seabirds out to a radius of more than two miles around the icebergs. They may also play a surprising role in global climate change. “One important consequence of the ...

West Australian fossil find rewrites land mammal evolution

... skull had large holes for breathing through the top of the head but importantly also had muscular front fins with a well-formed humerus, ulna and radius the same bones are found in the human arm. "This new fossil proves that features of land-living tetrapods (four-legged vertebrates) evolved much ...

Surprise finding for stretched DNA

... by about 0.5 nanometers per turn." To explain the overwinding, Bustamante and his coauthors have proposed a simple "toy" model in which the radius of the DNA double-helix is allowed to shrink as the molecule is stretched. The model consists of an elastic rod that is wrapped around its outer ...

Ancient DNA provides clues to the evolution of social behavior

... of indigestible fur, bones and teeth while they rest. From these teeth, scientists can determine which rodent species lived in a roughly 3-mile radius of the cave at any given time. Using modern and ancient DNA from tuco-tuco teeth found in the two caves, Stanford graduate student Yvonne Chan, ...
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