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Tag: "simulations" at biology news

New technique puts brain-imaging research on its head

...l be in the development and validation of computer simulations of traumatic brain injury, which may ultimately reduce the need for direct experimentation." Bayly and Genin are collaborating with David Brody, MD, Ph.D., instructor in neurology at the Washington University School of Medicine, and Sheng K. Song, P...

Pleasing plant shapes explained by new computer model

...," said Prusinkiewicz, who specializes in computer simulations and visualizations in plant biology. " ...

The Amazon in 2050: Implementing the law could save a million square kilometers of rainforest

...f forests and climate models to develop integrated simulations of the region's future. Britaldo Soares-Filho is a geographer and modeler. He has studied Amazon land-use patterns for the last 12 years, developing computer programs that simulate land-use change. He is a professor at the Universidade Federal de ...

Why nerve cells work faster than the theory allows

... to recreate the behavior of the cells in computer simulations of Hodgkin-Huxley-type models. To their surprise, it turned out that a high variability of the threshold value and a rapid onset of the action potential cannot be unified in this model. Both characteristics behave like both sides of a seesaw. To obta...

USC, Rice to develop bacteria-powered fuel cells

...d our laboratory work," said Lüttge. "The computer simulations help us perform better experiments, and the laboratory tests help us design better simulation, and the overall combination saves time and money." In addition to the computational modeling, Lüttge will contribute his experimental skills in an imaging...

Researchers unravel DNA tangles and enzyme seamstresses

... of Biophysical Journal, researchers used computer simulations to mimic the DNA mess inside the nucleus with a se...ich, who notes that "the results of these computer simulations are very striking." While Chan and his collaborators stress their results represent only a quantita...

Parts of the Caribbean and Central America are likely to have less summer rain

... and from decade-to-decade." The computer climate simulations also agree on the magnitude of drying trends in other regions within the tropics but disagree on where it will occur. The Caribbean/Central-American region is an example where the models agree reasonably well. Neelin's research is federally funded b...

Computer simulation hints at new HIV drug target

...however, this suspended animation paid off, as the simulations uncovered a potential new drug target to fight dru...alifornia Institute of Technology. "We hope these simulations will motivate the researchers in pharmaceutical or biotechnology companies to pursue the design of a...

Major WHO study concludes calcium supplements can reduce complications during pregnancy

...however, this suspended animation paid off, as the simulations uncovered a potential new drug target to fight dru...alifornia Institute of Technology. "We hope these simulations will motivate the researchers in pharmaceutical or biotechnology companies to pursue the design of a...

Rehydrate -- your RNA needs it

...ter molecules using a combination of computational simulations and a technique called single-molecule fluorescence resonance energy transfer (FRET), which allowed the researchers to directly observe and measure how quickly the ribozyme switched forms and how the rates changed when various parts of the molecule w...

On the track of tiny larvae, a new model elucidates connections in marine ecology

...ly developed by researchers combines ocean current simulations and genetic forecasting to help scientists predict animal dispersion patterns and details of the ecology of coral reefs across the Caribbean Sea. The work is reported by Heather M. Galindo and Stephen R. Palumbi of Stanford University, and Donald B. ...

Plants' role in global warming re-examined

...atively small compared to different climate-carbon simulations performed over the years, the authors note that th...ust downward." While some previous climate-carbon simulations have included differentiation among vegetation types, none have incorporated an explicit time-depend...

A simple feedback resistor switch keeps latent HIV from awakening

...cetylation in controlling viral dormancy. Finally, simulations under noisy conditions predicted that this simple resistor system was better able to resist environmental fluctuations than hypothetical oligomer-dependent switches, and cell-sorting experiments confirmed this prediction. This simple switch, in wh...

HIV exploits competition among T-cells

...ng against the virus ?a strategy that the computer simulations suggest may prevent the final onset of AIDS. The research, which is slated for publication in Physical Review Letters, is available online at http://arxiv.org/abs/q-bio.PE/0610018 . "Competition among T cells exerts a small influence for most dis...

Researchers make nanosheets that mimic protein formation

...ure of the nanoparticles," Glotzer said. "Computer simulations allowed us to further develop and test this hypothesis." Post doctoral researcher Zhenli Zhang of Glotzer's group tried various combinations of forces based on information gleaned from experiments performed by post doctoral Zhiyong Tang of Kotov's...

Small, smaller, smallest -- The plight of the vaquita

...a genetic problem. Genetic analyses and population simulations suggested that the vaquita has always been rare and that its extreme loss of genomic variability occurred over evolutionary time rather than recently owing to human-caused mortality. Instead of those factors, the “smoking gun?in this instance is acci...

Supercomputing equipment to advance the frontiers of computational biology

...eam. The new SUR award is designed to help develop simulations for prototyping medical devices in "virtual patien... patches, and inhalers. To be successful, these simulations must run efficiently and effectively on the latest generation of high-performance computing equipmen...

Comprehensive model is first to map protein folding at atomic level

...a protein as happens in nature. In more than 4,000 simulations conducted by the researchers, the computer model consistently predicted folded structures nearly identical to those that have been observed experimentally. "This work should open new vistas in protein engineering, allowing rational control of not ...

Math model predicts cancer behavior

...of cancer biology envisions a future when computer simulations like this will be used to predict a tumor's clinic...ries of mathematical equations that drive computer simulations of tumor growth ?suggests that the microenvironment around tumor cells determines the tumor's ultima...

How does your brain tell time?

...to show that the network could tell time. Their simulations indicated that a specific event is encoded within the context of events that precede it. In other words, if one could measure the response of many neurons in the brain to a tone or a flash of light, the response would not only reveal the nature of t...

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