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Tag: "upon" at biology news

Asleep in the deep: Model helps assess ocean-injection strategy for combating greenhouse effect

...meters---the approximate depth at which, depending upon temperature and pressure, liquid CO2 becomes a gas. One solution is to make the droplets smaller. "Droplets injected to a depth of 800 meters will rise, but if they are small enough they should dissolve completely before reaching the liquid-gas tran...

Mutations in the BRAF gene predict sensitivity to a novel class of cancer drugs

...y for treating patients whose tumors are dependent upon this specific genetic change is the next step, and such clinical trials are now ongoing." "The BRAF mutation was first identified by a consortium of investigators searching for proteins that are frequently mutated in human cancer," said Dr. David So...

New technique helps researchers determine amino-acid charge

...acid residues, which can acquire a positive charge upon binding protons and become neutral upon releasing them. "One thing is the proton affinity of an amino-acid residue when the amino acid is d...

ORNL leading effort to help harness power of Shewanella

...he Department of Energy's Office of Science builds upon advances made through a three-year consortium whose members have already sequenced the genome ?the genetic makeup ?of seven strains of the Shewanella, a relatively common microbe with diverse capabilities. Working with the Joint Genome Institute, res...

Overfishing may drive endangered seabird to rely upon lower quality food

...ound along the Pacific coast, to increasingly rely upon less nutritious food sources, according to a new s...ne," said Beissinger. "When murrelets have to rely upon less nutritious foods, they need to spend more time diving underwater to catch and eat them, and hav...

Discovering the first steps in transcription-coupled repair

...etitive sequence of bases, with folding of the DNA upon itself, which make progress difficult. Unable to continue copying, RNAPII pauses and sometimes grinds to a halt. Exposure to sunlight causes decreased transcription when ultraviolet-induced DNA damage blocks RNAPII. Transcription-coupled repair norm...

'Sharp' older brains are not the same as younger brains

...ve cells, where chemicals released by one cell act upon another.) Synaptic communication is the way brains register and preserve information to form memories. The team found that while the older rats with compromised cognition had brains that had lost the ability to adjust the force of those synaptic c...

Evolutionary conservation of a mechanism of longevity from worms to mammals

...es, suggesting that resistance to oxidative stress upon loss of mclk1 provides a growth advantage. Though the aging process of different organisms will most likely differ due to different physiologies and environments, Dr. Hekimi summarizes the relevance of their findings by concluding that "�the longe...

New understanding of regeneration gained by Forsyth scientists

...growth and an imposition of the correct morphology upon the regenerating tissue. Understanding this process is crucial for both the basic biology of pattern formation, and for developing novel biomedical approaches. Planaria have powerful regeneration capability that makes them ideal for studying this pr...

Free-energy theory borne out in large-scale protein folding

...ilding up an overall picture of MLAc folding based upon statistical approximations of molecular events. On the experimental side, Wittung-Stafshede, Matthews and Wilson prepared samples of MLAc and added urea to cause them to unfold. The team then injected water into the solution very fast, diluting the ...

Did feathered dinosaurs exist?

... in theropod dinosaurs," they say, and casts doubt upon the theropod derivation hypothesis. Finally, they discuss the significance of the Chinese discoveries with respect to bird origin and flight. The authors emphasize that the totality of evidence from various branches of science must be included if w...

Scientists pinpoint inflammation gene

...hese groundbreaking findings about SEPS1 are built upon a discovery five years ago by ChemGenex Pharmaceuticals. The company was studying the desert sand rat, an animal that, like humans, has certain individuals with a greater propensity than others for obesity and diabetes, as well as the inflammation a...

Marine conservation organizations team up to conduct Indonesia coral reefs assessment

...e well-being of the people of Indonesia who depend upon the rich resources of the sea. This survey will help us understand the extent of the damage to the coral reefs from the tsunami and therefore guide management decisions to assist their natural recovery," said Capt. Philip Renaud, USN (Ret.), Executi...

Dangerous tricksters: Some bacterie use immune cells to reproduce

...l of soil from an affected farm there are millions upon millions of rhodococci, yet it practically never happens that healthy humans are successfully infected by them.' ...

Pulp mill devastates swans' sanctuary in Chile

...dings and recommendations, is now urgently calling upon the Chilean government and CELCO to take immediate remedial measures to protect the sanctuary and develop a plan to end pollution from the mill. Further research is also urgently needed to determine the full impact of the pollution on both the enviro...

U. of Colorado researcher identifies tracks of swimming dinosaur in Wyoming

...r, apparently to escape from sea urchins that prey upon them. The video and related studies help paint a bigger picture of the evolution and ecology of these deep-sea creatures and their predators. University of Michigan professor of geological sciences Tomasz Baumiller will show the videos and discuss ...

Creeping crinoids! Sea lilies crawl to escape predators, new video shows

...r, apparently to escape from sea urchins that prey upon them. The video and related studies help paint a bigger picture of the evolution and ecology of these deep-sea creatures and their predators. University of Michigan professor of geological sciences Tomasz Baumiller will show the videos and discuss ...

NRL scientists detect 'milky sea' phenomena

... the phenomena as giving the impression of sailing upon a field of snow or gliding over the clouds--all under the darkness of a moonless night. The glowing waters appear to extend to the horizon in all directions, and can last from several hours to several days. They are thought to be caused by enormous p...

Once-dreaded leprosy 'replaced' by tuberculosis, say researchers

...ions throughout Europe. Their conclusion is based upon the examination of DNA from human remains from the ancient and medieval periods in Israel and Europe. In these examinations, the scientists found traces of both leprosy and tuberculosis bacteria in 42 percent of the cases. The findings on the relati...

Chernobyl: The true scale of the accident

...ot trust and accept the information and do not act upon it, according to the Report. This recommendation calls for targeting information to specific audiences, including community leaders and health care workers, along with a broader strategy that promotes healthy lifestyles as well as information about ...

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