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Tag: "floating" at biology news

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

...part of a bay on the Ross Sea that is covered with floating glacier ice. "Then the whole thing spreads out like oil on water," Waddington said. The West Antarctic Ice Sheet once rested on the bottom of the bay all the way to its "grounding line" at the continental margin in the Ross Sea. However, that ice h...

Duke Chemists Isolating Individual Molecules Of Toxic Protein In Alzheimer's, Parkinson's Disease

...fibrils measure only billionths of a meter and are floating in a disordered mix, "the initial stages of amyloid aggregation are not fully understood," he said. "When you start a normal reaction, molecules are free in solution so they interact with each other randomly," Akhremitchev said. "If you want to diss...

Scientists discover how fish evolved to float at different sea depths

...ish, such as pike and cod, have developed a way of floating at certain water levels using a gas-filled swimbladder. Dr Berenbrink investigated the mechanism that allows fishes to keep the swimbladder inflated with gas even at great water pressure in the depths of the sea. The mechanism comprises of a complex...

Supercomputer Dedicated To Bioengineering, Computational Biology Installed

...ell for less than $180,000 per Teraflops (trillion floating point operations per second), is a distributed-memory parallel computer. It is valued not only for its speed, but also because its 428 gigabytes of memory capacity and 20 terabytes of storage will enable researchers to solve ever larger and more soph...

Oceans more vulnerable to agricultural runoff than previously thought, study finds

...ensitive instruments that can detect phytoplankton floating near the surface of the sea. "These instruments measure the level of greenness in the water," explained Kevin Arrigo, associate professor of geophysics. "The greener the water, the more phytoplankton there are." Dramatic results Stanford doctoral ...

Currents could disrupt ocean food chain

...re samples show pebbles from land delivered by the floating icebergs." Schmittner said scientists also have examined ice cores from Greenland and measured isotopes that show rapid temperature changes, which coincide with changes in ocean nutrient concentrations measured in deep-sea sediment cores. "One full...

Deep thinking: Scientists sequence a cold-loving marine microbe

...to 10° --hugging sediments along the Arctic floor, floating in the open ocean, and nestled inside Arctic and Antarctic sea ice. To explain C. psychrerythraea's unique cold-adapted chemistry, TIGR researchers and collaborators first sequenced the bacterium's genome and analyzed its gene content for telltale p...

Discovering an ecosystem beneath a collapsed Antarctic ice shelf

...s to explore the uncharted life below Antarctica's floating ice shelves and further probe the origins of life in extreme environments. Researchers discovered the sunless habitat after a recent underwater video study examining a deep glacial trough in the northwestern Weddell Sea following the sudden Larsen B ...

Researchers develop new method for studying 'mental time travel'

... you can remember things that you had no idea were floating around in your head," Norman said. "Our method gives us some ability to see what cues participants are using, which in turn gives us some ability to predict what participants will recall. We are hopeful that, in the long run, this kind of work will h...

Ancient trans-Atlantic swarm brought locusts to the New World

...ren died and landed in the ocean, they formed huge floating mats of dead locusts," says Lovejoy. "The other locusts would land on these mats, rest and feed on the dead bodies, then take off and keep flying." Another possibility is that among the millions of swarming locusts were a few exceptional insects that...

Patterns in genome organization may partially explain how microbial cells work

...ored islands of statistically significant patterns floating in a sea of insignificant patterns," said Palsson, author of Systems Biology: Properties of Reconstructed Networks (Cambridge University Press, 2006). "Basically, it demonstrated that most bacterial genomes are highly organized. Our results demonstra...

Nano machine switches between biological and silicon worlds

...ing held up by a weather balloon, by anchoring the floating end of the DNA strand to a magnetic bead, itself held up under the influence of magnetism. A specific type of protein, called a Restriction-Modification enzyme, provides one of the DNA motors. This type of DNA motor will only bind to a specific sequ...

A dichotomy in migration patterns found for sea turtles in east Atlantic

...somewhatdifferent set of prey that includes small, floating plants and animals. Importantly, the correlations in animal size and foraging strategy suggest that the majority of adults in the Cape Verde population may undertake the oceanic strategy, rather than the primarily coastal existence previously though...

Study IDs protein that inhibits HIV from growing in cell cultures

...," Stapleton said. "Who would have thought a virus floating around in a lot of people does not make them sick but could significantly influence survival in people with HIV?" ...

Triple threat: World fin trade may harvest up to 73 million sharks per year

...real data, numbers as high as 100 million had been floating around for a while, but we had no way of knowing whether or not this was accurate," says Ellen Pikitch, Ph.D., co-author and executive director of the University of Miami's Pew Institute for Ocean Science. "This paper, which produces the first estim...

Nanotechnology meets biology and DNA finds its groove

...y are forced to work with collections of molecules floating in solution, and there is no easy way to precisely single out individual molecules for study. Now, however, scientists have developed a quick, inexpensive and efficient method to extract single DNA molecules and position them in nanoscale troughs ...

Mice with a migraine show signs of brain damage

...t one out of four migraine sufferers might involve floating black spots, flashing light, or some other visual changes. Nedergaard says those disturbances might actually be a visual sign that parts of the brain are short of oxygen. In the work described in Nature Neuroscience, Nedergaard studied a phenomeno...

Scientists discover 5 new species of sea slugs from the Tropical Eastern Pacific

...ographed and collected by Alicia Hermosillo from a floating buoy southeast of Isla Coiba, Coiba National Park, Panama. The new species status and naming of this animal awaits the discovery of additional specimens....

Definitive evidence found of a swimming dinosaur

...ce, the S-shaped prints paint a picture of a large floating animal clawing the sediment as it swam in approximately 3.2 meters of water. Ripple marks on the surface of the site indicate the dinosaur was swimming against a current, struggling to maintain a straight path. "The dinosaur swam with alternating ...

Antarctic icebergs -- Hotspots of ocean life

...o a new study in this week’s journal Science these floating islands of ice – some as large as a dozen miles across – are having a major impact on the ecology of the ocean around them, serving as “hotspots” for ocean life, with thriving communities of seabirds above and a web of phytoplankton, krill, and fish ...

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