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Tag: "simulated" at biology news

Simulations unravel outer membrane transport mechanism

...ppening inside or outside.” U. of I. researchers simulated the interaction of part of the inner membrane protein TonB (shown in red) and the luminal domain (in green and dark blue) of the outer membrane transporter. The yellow sphere represents the point on the TonB protein at which the force was applied. To...

Arctic ice retreating more quickly than computer models project

...struments. They found that, on average, the models simulated a loss in September ice cover of 2.5 percent per d...umber of factors that may lead to the low rates of simulated sea ice loss. Several models overestimate the thickness of the present-day sea ice and the models ma...

DOE JGI sets 'gold standard' for metagenomic data analysis

... the inherent pitfalls, "we have constructed three simulated metagenomic datasets of varying complexity by mixi...nce Division at Argonne National Laboratory. "The simulated datasets constructed by the authors provide a much-needed test bed for evaluation and comparisons of...

Dinosaur hearing, listening to muscle noise, quieter cubicles

...tions of implementing their design. In a map of a simulated open-office plan, the tool graphically displays real-time calculations of the "Speech Privacy Index," a quantitative measure of how much speech can be heard in a given environment. The calculator takes into account such variables as partition type, ...

Brain's reward circuit activity ebbs and flows with a woman's hormonal cycle

...n and 13 men while they performed a task involving simulated slot machines. The women were scanned before and after ovulation. The fMRI pictures showed that when the women were anticipating a reward, they activated the amygdala and a cortex area behind the eyes that regulates emotion and reward-related pla...

Scientists uncover link between ocean's chemical processes and microscopic floating plants

...ted a month-long field experiment. The researchers simulated present-day carbon dioxide concentrations and ocean acidity, and carbon dioxide levels expected at the end of this century and the middle of the next one. The study, funded by the National Science Foundation (NSF), New Mexico Tech and the Comer Found...

Scientists find method to pick noncompetitive animals, improve production

... of various colorful fish species interacting in a simulated ecosystem at the Monterey, Calif., aquarium. "There is an inherited part of the associations among animals that has profound effects on performance," Muir said. "It's called competition. Animals compete for food, space, territory and mates." In...

Surgeons with video game skill appear to perform better in simulated surgery skills course

...th laparoscopic surgery skill as assessed during a simulated surgery skills course, according to a report in th...rse that scores surgeons on time and errors during simulated surgery drills. During the study, conducted from May through August, 2002, the surgeons also played...

How to manage forests in hurricane impact zones

...ng harvesting and thinning operations. The authors simulated the potential damage to 9 theoretical stands of pine trees, looking at how each would react to hurricane wind speeds, to make recommendations for different situations. "Our simple simulation of stem breakage potential suggests that stand spacing ...

RNA map provides first comprehensive understanding of alternative splicing

... cleanly fit the pattern." The researchers also simulated alternative splicing in the test tube, mixing purified RNA and a splicing extract. When purified Nova was added to the extracts, it bound to the mRNA clusters, altering the outcome of the how the splicing machinery was able to assemble in a manner th...

Rescuing injured hearts by enhancing regeneration

...tiply and the heart to regain its function after a simulated myocardial infarction. The study will appear in th... on this finding. They studied 120 rats, some with simulated heart attacks. After the injury, the animals were randomly assigned to receive injections with a p38...

Embryonic patterning makes the feathers fly

...ists was able to develop a mathematical model that simulated the process of periodic pattern formation. This kind of basic work can throw light on health problems like developmental disorders, on questions in evolutionary biology, and on new biotech possibilities including tissue engineering....

Therapeutic role found for carbon monoxide

...uestion, coauthor Beek Yoke Chin, PhD, developed a simulated blood vessel by growing the cells on a semi-permeable membrane, which enabled the two cell types to "communicate" with one another through pores. And that, says Otterbein, was when the scientists observed that in this "co-culture" setting, CO was abl...

Getting to the heart of the heart

...n, he was also able improve heart function after a simulated heart attack. ...

3-D ultrasound scanner could guide robotic surgeries

...nt in real time the exact location of targets in a simulated surgical procedure. That spatial information then guided a robotically controlled surgical instrument right to its mark. The scanner could be coupled to the surgeon-operated robots that are being increasingly used for performing minimally invasive ...

Birds going extinct faster due to human activities

...tive director of the McKnight Brain Institute. "We simulated some events that occur while the brain is developing and challenged them with different environments, and the effects are profound. Ultimately both nature and nurture influence the final identity of a stem cell, but in early stages it seems nurture i...

Medium is the message for stem cells in search of identities

...tive director of the McKnight Brain Institute. "We simulated some events that occur while the brain is developing and challenged them with different environments, and the effects are profound. Ultimately both nature and nurture influence the final identity of a stem cell, but in early stages it seems nurture i...

Brain-computer link lets paralyzed patients convert thoughts into actions

...l and Rehabilitation Center, Nagle learned to open simulated e-mail, draw circular shapes using a paint program on the computer and play a simple video game, "neural Pong," using only his thoughts. He could change the channel and adjust the volume on a television, even while conversing. He was ultimately able ...

Virus has 'catastrophic' affect on red squirrels, research shows

...in Norfolk in the last ten years). The team then simulated various management strategies using a computer model. Although results suggested that a continuous cull of more than 60 per cent of greys would be needed to save red squirrels on a landscape scale, researchers reasoned this approach would be costly,...

Viagra improves high altitude exercise performance up to 45% for some

...turation of the arteries when the cyclists were at simulated altitude of 12,700 feet. But the researchers dis...s, with and without sildenafil at sea level and at simulated altitude of 3,874 meters. Neither the participants nor the researchers knew whether the trial includ...

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