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Tag: "low" at biology news

Low oxygen likely made Great Dying worse, greatly delayed recovery

... land above sea level became uninhabitable because low oxygen made breathing too difficult for most organ...ly thought about the physiological consequences of low oxygen levels during the late Permian period, but not about these biogeographical ones," he said. A...

Scientists reveal the shape of a protein that helps retroviruses break into cells

... land above sea level became uninhabitable because low oxygen made breathing too difficult for most organ...ly thought about the physiological consequences of low oxygen levels during the late Permian period, but not about these biogeographical ones," he said. A...

Successful Test Of Single Molecule Switch Opens The Door To Biomolecular Electronics

...e is maintained at its highly conductive state (at low voltage) and then the voltage applied to the molec...efore but never in controlled conditions, never at low voltages, and not in a predictable way.?/p> Lindsay stresses that the main value of the finding ...

Too much water may be as dangerous as too little during long-distance athletic events

...the race and their sodium concentrations were very low - some were dangerously low," Dr. Levine said. "The recommendations listed in the study that fluid-replacement schedules be individualized for all athletes competing in long-distance events should be taken seriously by all competitors." People lose ...

Bush, Cheney and Rumsfeld are now species of slime-mold beetles -- but strictly in homage

...the race and their sodium concentrations were very low - some were dangerously low," Dr. Levine said. "The recommendations listed in the study that fluid-replacement schedules be individualized for all athletes competing in long-distance events should be taken seriously by all competitors." People lose ...

New design : complete

...the race and their sodium concentrations were very low - some were dangerously low," Dr. Levine said. "The recommendations listed in the study that fluid-replacement schedules be individualized for all athletes competing in long-distance events should be taken seriously by all competitors." People lose ...

Innovative collaboration brings Arctic science into the classroom

...les in the ice and occasionally in temperatures as low as ?5 degrees Celsius (-67 degrees Fahrenheit). Anya's samples are already proving to be highly valuable, as her high frequency samples have captured temporal variability that otherwise would have been missed. Because of Anya's interest, in May and ...

Hydrogen and methane provide raw energy for life at 'Lost City'

...And there is little hydrogen sulfide and only very low traces of metals, on which many of the microbes at...nic sediments. However the diversity of species is low with, for example, just a handful of methane-producing and methane-consuming Archaea. In surprising...

Making Sure Sacred Sheep Don't Become Extinct

...ets. But for industrial wool manufacturers, it has low value. Blackburn has 1,200 semen samples now from 27 different rams. He hopes to get samples from at least 50 different males to get a broad sampling of genetic diversity. If there were ever a need to totally regenerate the Navajo-Churro breed from...

Mother birds increase progesterone to hatch females

...s during the first meiosis. They injected either a low dose or a high dose of progesterone (dissolved in ...me oil) or a control dose of pure sesame oil. The low dose of progesterone produced 61 percent males, which was very close to the control group rate of 63...

Cousin of Asian super termite invades Florida

...o sustain underground colonies. The chemical has a low toxicity to humans and the environment. Less than one gram kills an entire colony containing millions of termites. The control is marketed worldwide as the Sentricon Termite Colony Elimination System by Dow AgroSciences. ...

Gov't Creates Gene Database of Normal Human Tissues

...y the Human Genome Project revealed a surprisingly low number of human genes (20,000-25,000), and Khan said it had been previously reported that "only a fraction of that, perhaps 10,000 genes, are actively transcribed in normal cell processes." Thus it becomes strategically useful to characterize this es...

Building a protein name dictionary from full text: a machine learning term extraction approach

... This is a limitation, because such databases have low coverage of the many name variants which are used to refer to biological entities in the literature. Results We present an approach to recognize named entities in full text. The approach collects high frequency terms in an article, and uses support ...

Primates on the brink

...uch as the Sumatran orangutan, still number in the low thousands but are disappearing at a faster rate than other primates. The December tsunamis that devastated coastal Sumatra have triggered a possible new threat to orangutan habitat from resettlement of area residents. Changes to the list from 2002 r...

At the molecular level, the predator is the prey

..., octopuses and primitive chordates. It is used in low concentrations to treat morphine and heroine addicts. It's also the "zombie" drug used by Haitian voodoo ritualists. Despite its action at the molecular level, the evolution of TTX in some organisms is viewed by ecologists as a defense mechanism. In...

'EuroVacc 02' HIV Vaccine Trial Begins

...imen to NYVAC-HIV-C alone in healthy volunteers at low risk of acquiring HIV infection. The study will re...ould be between 18 and 55 yrs, HIV-negative and at low risk of infection. The trial will carefully evaluate the safety and immunogenicity of the combinati...

Pair of cancer genes found to drive both cell migration and division

...ronts' of what will be two new cells, and they are low at the furrow, or what amounts to the back of the new cells," says Devreotes. In their experiments, cells without PTEN and PI3K couldn't regulate levels of PIP3, and they divided much slower than normal cells. These cells became "stuck" and accumula...

Atmosphere may cleanse itself better than previously thought

...n observed to produce air-scrubbing OH radicals at low ultraviolet wavelengths. This observation has eluded science primarily because photochemistry at these wavelengths has been difficult to study. "Thanks to an innovative laser technique that at last allows us to observe these chemicals in action, we ...

Experiment station researchers to explore genome of disease-fighting fungus

...e effectively employ sustainable practices such as low till agriculture," said Wilkinson, who is research...ogens that remain in the soil when you incorporate low till. In theory, it would be cost-effective for many producers. "By placing the disease-fighting fu...

Second messenger NAADP shows fast, dose-related impact on satiety cycle

...lls, has two binding sites, one of high and one of low affinity. "Unequivocal evidence that NAADP is a crucial messenger" "Intriguingly, the plot of NAADP level versus cholecystokinin concentration was best fit with a two-site model, suggesting that both the high- and low-affinity sites were linked to ...

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