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Tag: "faster" at biology news

Geneticists discover genes that make fruit fly hybrids sterile

...nd the Lhr gene in D. simulans each evolved much faster than most other genes and diverged due to natural selection, a genetic change due to a pressure that benefits the survival of a species. The researchers would like to learn what these genes normally do within their species in order to understand why ...

Faster, more accurate tuberculosis test developed

...on drug-susceptibility or MODS, is more sensitive, faster and cheaper to perform than current culture-based ...e principles: (1) Mycobacterium tuberculosis grows faster in liquid medium than in solid medium; (2) TB grows in characteristic tangles or coils and these cha...

Particle size matters to bacteria ability to immobilize heavy metals

...is, the bacteria will reduce 100 nm particles much faster than smaller particles. "This study provides the groundwork for further investigations looking into the influence of particle size in bioreduction rates of various metal oxides ," Bose said. The talk, "Bioreduction kinetics of hematite nanoparticl...

Nerve cell software keeps track of brain change

...wn that the software can do this one hundred times faster than a person using manual tracing methods can," Dr Vallotton says. "This improvement will speed the progress of brain research ?research which is becoming increasingly urgent in a world where tens of millions of people suffer neurodegenerative dis...

Scientists get best look ever at water-life connection

...ll tell you that the interaction would happen much faster -- on the picosecond [one trillionth of a second] time scale -- because that's how fast water molecules move. And someone who uses X-rays will give you a different answer than someone who uses nuclear magnetic resonance and so on." "My feeling is th...

MIT designs portable 'lab on a chip'

... biological or chemical weapons could soon be much faster and easier, thanks to MIT researchers who are helping to develop a tiny diagnostic device that could be carried into battle. By tweaking the design of a tiny pump, researchers affiliated with MIT's Institute for Soldier Nanotechnologies have taken a...

PLoS ONE is launched by the Public Library of Science

...pace of scientific research because publication is faster and more interactive than ever before. No longer need there be months of delay between submission and publication. Now there is a way to share not only the results of research but also the responses, ideas, and opinions of fellow researchers as well....

Different strategies underlie the ecology of microbial invasions

...fully compete with phage-susceptible bacteria even faster when the carriers are rare, whereas chemical killers can only win in a well-mixed environment when chemical carriers are sufficiently abundant. The findings show that the release of chemical toxins is superior as a resident strategy to repel invasion...

For super-obese patients, duodenal switch beats gastric bypass

.... obesity pandemic, but their ranks are increasing faster than any other group. When the term was coined in 1987, fewer than one in 2,000 adults in the United States met the criteria of a BMI greater than 50. (A normal BMI is 18.5 to 24.9. From 25 to 29.9 is considered overweight. Thirty or above is cons...

A simple feedback resistor switch keeps latent HIV from awakening

...as in the cell, Tat deacetylation occurs at a much faster rate than acetylation. Deacetylated (inactive) Tat can take one of two paths--reconversion in to acetylated (active) Tat, or destruction of the protein by cellular machinery. When the appropriate conversion and destruction rates were fed into their m...

Complexity constrains evolution of human brain genes

...hey found was that the "more advanced" species had faster overall rates of evolution. So, on average, the genes from humans and chimpanzees changed faster than genes from monkeys, which changed faster than those from mice. They explained the trend a...

Female pronghorns choose mate based on substance as well as show

...to weaning, Byers found. "This advantage is due to faster growth rates," he said. Byers also showed that these faster-growing fawns suckle less from their mothers than do the offspring sired by less-attractive males. He monitored the population for several years, and found the offspring of frequently chos...

Tastes great! Study shows brain's response to pleasing -- and changing -- tastes

...rain Morse code for pleasure," says Berridge. "The faster these neurons fire, the more pleasant the taste seems to become. The hardest test for a pleasure code is whether the brain signal can track the change from nasty to nice. The amazing fact is that these neurons pass that test." Aldridge notes that a...

Embryos exposed in 3-D

...ues and organs, was found to be more efficient and faster than traditional technology used for cell separati...and enrich cells that result in higher cell yield, faster processing time, ease of use and are also more likely to meet future regulatory requirements," state...

New technology enables faster, more efficient cell harvest: Cell therapy meeting study

...ues and organs, was found to be more efficient and faster than traditional technology used for cell separati...and enrich cells that result in higher cell yield, faster processing time, ease of use and are also more likely to meet future regulatory requirements," state...

Do angry men get noticed?

... In addition, men find angry faces of both genders faster than women, whereas women find socially relevant expressions (for example, happy or sad) more rapidly. The work suggests that although males are biased toward detecting threatening faces, and females are more attuned to socially relevant expressions,...

Pollutant haze heats the Arctic

...physical behavior that explains why a potato cooks faster in a microwave oven if it is cut into smaller pieces. "Same amount of potato, but more efficient cooking, because more of the interior of the potato is exposed to the penetrating microwave radiation," Garrett says. ...

Brain-computer link lets paralyzed patients convert thoughts into actions

...m is constantly being improved. Next steps include faster and more precise algorithms to help the computer keep pace with the neuronal inputs, and a more portable wireless system. The researchers are also looking at new applications, such as enabling the brain-computer combo to control a wheelchair or other...

Bedsores and bald hides: Novel roles revealed for a 'scaffolding' protein

...hers, cells lacking K17 speed from growth to death faster than normal cells, preventing sufficient hair growth. When cells of normal hair follicles die, they follow a specific and genetically controlled death program. The team found that the K17 cytoskeleton protein is required to physically interact wit...

Time of day tempers tadpoles' response to predators

... there's a trade-off. The more a tadpole eats, the faster it grows big enough to transform into a frog; yet finding food requires being active, which ups the odds of becoming someone else's dinner. Scientists have known that prey adjust their activity levels in response to predation risk, but new researc...

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