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Tag: "compete" at biology news

HIV exploits competition among T-cells

...taneously infect one person. In this case, T cells compete to recognize the different strains. The winners ?t...hat different lymph nodes ?the sites where T cells compete to be chosen as the winners against a particular disease ?act as collection points for different par...

Does natural selection drive the evolution of cancer?

...ped to illuminate cancer biology. Mutant cells compete with each other for needed resources. The immune system often kills tumor cells like a predator hunting prey, and the tumor cells that develop defenses against the predation are the ones that survive and reproduce. An example of parasitism in the...

Nano-devices hold promise for early-stage cancer detection

...eeding a nanotechnology cluster in Canada that can compete internationally."...

Clue found to Epstein-Barr virus' ability to form and sustain tumors

...lop assays to screen for small molecules that will compete with the protein in binding to EBNA-1," Sugden says. "By preventing the cellular protein from binding with the segment, EBNA-1 will not be able to carry out its function and the tumor cells it sustains will die." The goal, which Sugden expects is ac...

Global changes alter the timing of plant growth, scientists say

...it reduces overlap in the time period when species compete for limited resources. Now, in a study posted online the week of Sept. 4 in the Proceedings of the National Academy of Sciences, ecologists working at Stanford's Jasper Ridge Biological Preserve report evidence that climate change may alter this deli...

Cities change the songs of birds

...t in frequency that is consistent with the need to compete with low-frequency environmental noise, such as traffic noise. Anthropogenic Impact on Signals Used by Wild Birds Earlier work, from Dr. Slabbekoorn and another coauthor, had shown that songs of individual birds were adjusted to local traffic...

Microbes compete with animals for food by making it stink

Microbes may compete with large animal scavengers by producing repugnan...role as classic consumers who produce chemicals to compete with larger animals could be an important and common interaction within many ecosystems -- and one t...

Birth rate, competition are major players in hominid extinctions

...hropus boisei became extinct when it was unable to compete with other mammals. A specialized feeder, Paran... went after the same food. Paranthropus could not compete because it produced one offspring a year at most, while the others had large litters and could incre...

Some caterpillers just don't want to grow up

...egregation" ?cohorts from both years do not always compete because infected ant colonies avoid re-infection in the next season ?favor evolutionary stable fractions of slow developers up to 50%. However, among all arguments suggested so far, only a "priority effect" ?the competitive asymmetry between last yea...

Researchers from the UGR use a bacterium to obtain biopreservatives from food

...icroorganisms have developed several strategies to compete for nutrients in their environment. One of these strategies is to produce antimicrobial compounds such as antibiotics, certain metabolism products, lytic agents, numerous types of protein exotoxins, and bacteriocins. It has become increasingly more n...

Scientists find method to pick noncompetitive animals, improve production

...nce," Muir said. "It's called competition. Animals compete for food, space, territory and mates." In the first of the two papers, Muir and his colleagues explain the tool they developed to determine inherited traits that contribute to interactions among both individual animals and groups. The second paper...

Farmed salmon could become an invasive species in forest streams

...sustaining populations. Escaped salmon could compete with already at-risk species, such as steelhead. "Given the precarious state of many of our native salmon stocks," explains Bisson, "it seems prudent to be safe rather than sorry, and to be diligent in monitoring any reports of Atlantic salmon i...

Mine runoff continues to provide clues to microbial diversification

...omplexity of how bacterial consortia cooperate and compete in nature. In fact, ORNL mass spectrometry provided the ability to resolve and differentiate peptides that differ by as little as one amino acid. Nathan VerBerkmoes of the lab’s Chemical Sciences Division was instrumental in designing the experime...

Tibetan antelope slowly recovering, WCS says

...ugh they are persecuted by nomads who believe they compete with livestock for grass. Schaller noted that some nomadic communities living in the Chang Tang region have made concerted efforts to safeguard their wildlife and have established local wildlife preserves to protect populations of wild yak and ot...

Newborn neurons like to hang with the 'in' crowd

...rvival of new neurons may depend on the ability to compete out the older existing neurons," says Gage. Earlier studies had shown that if young neurons fail to receive signals from other brain cells they wither and die. By connecting to functional synapses, the newborn neurons ensure that they are not reachin...

Alien plants attack using 'resource conservation' as weapon, researchers say

...ce-poor environments because they are less able to compete with indigenous plants, which have adapted to their habitats over thousands of years. But a new study by Stanford University researchers finds that invasive plants can flourish in low-resource environments by adopting efficient ways to use available ...

AAAS decries latest stem cell veto

...ill would mandate that such research be allowed to compete for federal funding while following strict ethical...ill would mandate that such research be allowed to compete for federal funding while following strict ethical guidelines. "The Executive Order is not a subs...

Researchers demonstrate way to control tree height

...e any kind of threat to spread, because they would compete very poorly with normal or wild trees. In virtuall...ree species, low height is a disadvantage as trees compete for sunshine. Another possible value, from that perspective, is that this trait might be used to hel...

CSIRO scientists join fight to save 'Tassie devil'

...etween animals by biting when, for example, devils compete for food. Once the cancer becomes visible and spreads internally through the body, the animal usually dies within a few months from starvation and the breakdown of body functions. The integrated research team at AAHL will use a variety of techniq...

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