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Tag: "scales" at biology news

Modeling the restless brain

...d interrelated temporal structure at multiple time scales that is shaped by the underlying structural topology," Sporns and Honey wrote in an article appearing this week in the Proceedings of the National Academy of Sciences early edition online. The article, which will be available at http://www.pnas....

City ants take the heat

...s. "We will quantify heat islands on the small scales that pertain to organisms, initially in Indianapolis and later in other major cities throughout the world," said Weng, an Associate Professor of Geography and Director of Indiana State's Center for Urban and Environmental Change. "We will construc...

Applied scientists create wrinkled 'skin' on polymers

...uidic devices for the mixing of flow at very small scales and stretching of proteins and DNA. These new efforts, while at early stages of development, are very promising." ...

NIH announces phase III clinical trial of creatine for Parkinson's disease

... measure disease progression using standard rating scales that measure quality of life, ability to walk, cognitive function, and the ability to carry out other activities of daily living. ...

'Hidden-hero' microbes in soil, water may help naturally clean toxic sites

...ssary to deploy bioremediation technologies at the scales necessary for them to be effective at U.S. DOE sites." In addition, the ORFRC has funded Kostka's FSU lab to develop and maintain a genetic database of genes of organisms that are present in the Oak Ridge site's subsurface. "With the genetic da...

By 2048 all current fish, seafood species projected to collapse

...ween biodiversity change and ecosystem services at scales ranging from small square-meter plots to entire ocean basins, Worm said. "This suggests that small-scale experiments can be used to predict large-scale ocean change. "Through this research, it became clear to me that we hardly appreciate living on...

First biomarker for human sleepiness identified in fruit flies

...in humans relies upon unreliable subjective rating scales and expensive, often impractical sleep laboratory testing," Duntley says. "Simple, easily accessible biomarkers for sleep debt in humans would revolutionize our ability to conduct research on the causes and consequences of sleep deprivation and provi...

Pressured by predators, lizards see rapid shift in natural selection

... evolutionary biology can be studied on short time scales and that predictions about it can be tested experimentally. We predicted, and then demonstrated, a reversal in the direction of natural selection acting on limb length in a population of lizards." Losos and colleagues studied populations of the li...

Slow brain waves play key role in coordinating complex activity

...fferent functions and operate on different spatial scales - a patch of high frequency activity is very localized, about the size of a dime or smaller on the brain, and is associated with bottom-up sensory or motor processing, while the theta rhythm is much more spatially widespread, the size of a silver dol...

MIT designs portable 'lab on a chip'

...els, but this requires bulky external plumbing and scales poorly with miniaturization. The second approach is capillary electro-osmosis, where flow is driven by an electric field across the chip. Current electro-osmotic pumps require more than 100 volts of electricity, but the MIT researchers have now de...

Very low birth weight linked to reduced quality of life in pre-school children

...red better on emotional and social quality of life scales if their primary caregiver had a higher level of education. "Previous studies of very low birth-weight babies have mostly focused on issues such as death, illness, neurodevelopment, growth and cognitive ability" says lead researcher Dr Li-Yin Chien,...

Plants' role in global warming re-examined

...nse to temperature, including acclimation, at time scales from minutes to years." On a global scale, plants release about 60 gigatons of carbon dioxide to the atmosphere each year as they carry out their life functions. Other authors of the Perspectives piece were Carla Gunderson, Wilfred "Mac" Post, Davi...

Pure novelty spurs the brain

...es, indeed, respond to novelty, and these response scales according to how novel the image was. They concluded that their data provide evidence for "a functional hippocampal-SN/VTA loop" that is driven by novelty rather than other forms of stimulus salience such as emotional content or the need to respond t...

New approach to vaccine development provides potent, long-lasting immunity

...o show that motor learning involves different time scales and implies that the best strategy in rehabilitating a stroke patient should focus on slow learning because slow-learned motor skills will be maintained longer," says the report's senior author, Reza Shadmehr, Ph.D., a professor of biomedical enginee...

Robotic joystick reveals how brain controls movement

...o show that motor learning involves different time scales and implies that the best strategy in rehabilitating a stroke patient should focus on slow learning because slow-learned motor skills will be maintained longer," says the report's senior author, Reza Shadmehr, Ph.D., a professor of biomedical enginee...

Finding a better way to make biodiesel

...d it still needs to be tested at larger and larger scales to see if the economic benefits are there. Tests also need to prove if the technology works in continuous-flow production rather than batch-by-batch production. "This research is a real boon to us," Breeding said. "We don't have a research campus. S...

Secrets of the sea yield stronger artificial bone

...icrometers to nanometers. Replicating all of these scales -- each of which contributes to the overall performance of nacre -- in a synthetic substance is extremely difficult. Then, the Berkeley Lab researchers thought of sea ice. "We allow nature to guide the process. Seawater can freeze like a layered ma...

One fish, two fish: New MIT sensor improves fish counts

...same shapes seen in a small scale appear on larger scales - tens of meters vs. tens of kilometers - displaying a fractal pattern. Population density patterns could be a means of communication, Makris said. His team observed "waves" of population density that spread quickly through a shoal. "We have a situa...

Leave it to salmon to leave no stone unturned

...gest females are more than a yard long and tip the scales at 45 pounds or more. The biggest nests are nearly a foot and a half deep and extend up to 17 square yards –about the size of two parking-lot stalls. The rims around these craters can be the bane of boaters who, even with boats meant to navigate in s...

Penguins waddle but they don't fall down, UH researchers say

...ns, are three feet tall on average and can tip the scales at up to 35 pounds. And they were also very eager to perform. "It's almost like playtime for them. We can't hold them back," Kurz said. "There is one in particular that always wants to cut in front of the other penguins, so that he can walk acr...

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