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Tag: "behave" at biology news

Attractive birds more immune against bird flu

... not only enhance our understanding of why animals behave and look the way they do but also help explain why animals that choose their own mates produce healthier offspring than animals whose mates are selected by humans. ...

Why nerve cells work faster than the theory allows

...not be unified in this model. Both characteristics behave like both sides of a seesaw. To obtain a high variability of the threshold value, the model requires a low speed of initiation of the action potential. A rapid onset is only obtained, when the variability of the threshold value is low. In order to ...

Protein 'nanosprings' most resilient found in nature

...ins can act like floppy springs, ankyrin molecules behave more like steel," said Piotr Marszalek, professor of mechanical engineering and materials science at the Duke Pratt School of Engineering. "After repeated stretching, the molecules immediately refold themselves, retaining their shape and strength." ...

Single microRNA causes cancer in transgenic mouse

...cell growth that leads to cancer. Others, however, behave more like tumor suppressors, because they block genes that keep abnormal cell division in check or induce prolonged survival. Our transgenic mouse model clearly shows that miR155 is an oncogene, because it leads to B cell malignancies when it is dysr...

USC, Rice to develop bacteria-powered fuel cells

... computer models to estimate how the bacteria will behave under different circumstances. Running tests on the computer will save time and money by allowing laboratory experiments to focus on best candidate approaches. "One of the hallmarks of our approach is the vigorous feedback between our computer model...

Nobelist discovers antidepressant protein in mouse brain

...ike behaviors, while those with sufficient amounts behave as if they have been treated with antidepressants," explained Paul Greengard, Ph.D., a Rockefeller University neuroscientist who received the 2000 Nobel Prize in Physiology or Medicine for discoveries about the workings of such neuronal signaling sys...

Aging cells, aging body: Fresh evidence for a connection

.... While senescent cells still function, they don't behave the way young cells do ?and are associated with skin wrinkles, delayed wound healing, weakened immune system response and age-related diseases such as cancer. "There is good evidence that senescent cells are not benign," Sedivy said. "But until now,...

Common molecular 'signature' identified in solid tumors

...nd better interventions," says Croce. MiRNAs can behave like oncogenes, which promote tumor growth, or tumor suppressors, which keep potentially malignant cells in check. Croce points out that miRNA activity is tissue-sensitive, meaning some miRNAs may be overexpressed, or "turned on" in some of the cance...

Nanopore method could revolutionize genome sequencing

... we view it as a bunch of atoms and electrons that behave in ways we can predict and manipulate," said Di Ventra. ...

Discovery may speed forest biotechnology

...tions and control it are so strong that trees will behave about the same even if they are transplanted to warmer regions, the scientists say. For applied research, Strauss said, researchers can now induce activation of the FT gene earlier, so that trees will reproduce at much younger ages ?months instead o...

NASA study solves ocean plant mystery

...ortant that scientists understand how ocean plants behave because all plants play a critical role in maintaining a healthy planet. Plants annually take up billions of tons of carbon dioxide from the atmosphere through photosynthesis and use this carbon to create the food that nearly all other organisms on E...

With few factors, adult cells take on character of embryonic stem cells

...ed cells taken from mouse embryos or adult mice to behave like embryonic stem cells. The researchers reported their findings in an immediate early publication of the journal Cell, published by Cell Press. The cells--which the researchers designate "induced pluripotent stem cells" (iPS)--exhibit the physic...

Rehydrate -- your RNA needs it

...e number of hydrogen bonds and making the ribozyme behave as an interconnected whole. Walter and coworkers also found evidence that water is directly involved in catalyzing reactions in the ribozyme's core, another previously unknown role. The research team explored the new roles of water molecules using...

Rice scientists unveil 'nanoegg'

... light, the electrons on a particle's surface must behave in such a way as to create a 'dipole moment,' a state marked by two equal but opposite poles, one positive and the other negative ?much like a magnet that attracts on one end and repels on the other. "Without a dipole moment, there is no 'handle' f...

Bacteria can help predict ocean change

...the oceans are changing, Fuhrman said. If bacteria behave predictably, they can be used to improve models for ocean change. By including bacteria, which make up the vast majority of species on land and sea, "we have some hope of predicting how changes are going to happen," Fuhrman said. ...

With few factors, adult cells take on character of embryonic stem cells

...ed cells taken from mouse embryos or adult mice to behave like embryonic stem cells. The researchers reported their findings in an immediate early publication of the journal Cell. The cells--which the researchers designate "induced pluripotent stem cells" (iPS)--exhibit the physical, growth, and genetic c...

Time of day tempers tadpoles' response to predators

...ation of these results is that green frog tadpoles behave more conservatively in response to a predator chemical cue during the day because predation risk may still be fairly high and the tadpoles are going to feed very little anyway. That means the growth rate-to-predation risk ratio is low. At night, the ...

Researchers offer clues to how leaves patterns are formed

...on of the veins. "It was believed that auxin would behave like man--build the streets on which man himself would travel," said Scarpella. "However, the theory argued that in each individual vein auxin could only run one way at any given time, making them sort of alternate one-way streets." By labeling the ...

Global warming may warrant new approaches to ecosystem restoration

Ecosystems behave in unpredictable ways and, because of this, restoration ecologists are often faced with unforeseen challenges. Researchers, in a recent article published in Restoration Ecology, argue that restoration methods of the past may not always be applicable...

UCSD researchers develop 'smart petri dish'

...es. This design effectively persuades the cells to behave collectively the way they do in a fully functioning liver. The scientists write in their paper that in their experiments the Smart Petri Dish was able to detect changes in the cells exposed to toxins "before traditional assays are able to detect a d...

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