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Tag: "change" at biology news

Small species back-up giant marsupial climate change extinction claim

... the past. "If we can document past environmental change and its influence on the extinction of species, it might have predictive value in estimating the effects of possible future climate changes and its impacts on modern species." Megafauna roamed the globe in the Pleistocene epoch, between 1.8 million ...

Some Brain Cells 'Change Channels' To Fine-tune The Message

...nto the living room, these brain cells are able to change what they allow in by swapping one kind of channel...hannels move is still unknown, as is why the cells change their channels. Part of the answer is likely to be self-preservation: Too much calcium inside nerve...

Medical whistleblowers speak out

...fety monitoring, we must be willing to examine and change all of the institutions that allow this synchrony to occur." In a related editorial, the PLoS Medicine editors explain why PLoS sponsored the roundtable and why they published Lenzer's account: "Lenzer's report will, we hope, spark discussion and de...

Cerebral navigation: How do nerve fibers know what direction to grow in?

...n's growth cone. But how this triggers the axon to change course or stop growing has been a mystery. "Very little has been known about the inner workings of the cell that govern axon guidance," says Michael Greenberg, PhD, Director of the Neurobiology Program at Children's and senior author on both studies...

New tumor-suppressor gene discovered

...normal mats gene into a line of flies and found no change in the shape of the flys' eyes. In the second experiment, they inserted an additional normal wts gene and found that the fly's eyes were decreased in size and deformed. In the third experiment, they inserted both a mats gene and a wts gene. "We found...

NYU and MSKCC research provides model for understanding chemically induced cancer initiation

... (MSKCC), has uncovered a conformational switch--a change in shape in a carcinogen-damaged DNA site--in tumo...l switch discovered by the research team entails a change in the conformation of a carcinogen-damaged site in a DNA model sequence similar to that in a p53 mu...

Elephant seal pups suffer from ocean warming

...he pups increased to eventually reach 130 kg. This change coincided with the cooling of the ocean at the beginning of the new century. "Despite ranging widely and foraging deeply in cold waters beyond coastal thermoclines in the northeastern Pacific, elephant seals are impacted significantly by ocean therm...

Man-made wetland's effectiveness similar to natural marsh

...ecially high," Mitsch said. "Of course, that could change as time goes on, however." Most of the water entering the wetland came as runoff from farm fields, and nitrate and phosphorus levels all peaked after fertilizer application in the spring. Still, the wetland was able to retain a significant portion o...

The circadian clock: Understanding nature's timepiece

...proves our understanding." For every hour of time change a person experiences it takes about a day to fully adjust. Workers on rotating shifts are constantly struggling to adapt and they experience well-documented health problems as a result. For example, one study found that nurses who work nights or rota...

Tendency to hair loss inherited from the mother

...receptor which develops as a result of the genetic change is more stable and is not broken down so quickly. Both mechanisms can lead to the effect of the androgens becoming greater, which in turn brings about hair loss." The findings are also interesting for the aspect of how hair loss is inherited. The ge...

Researchers find new giant amphibian fossils in Africa

...y of small teeth. "Our findings show that climate change more than 250 million years ago had a dramatic effect on species survival and evolution," says Larsson. "Something to keep in mind when evaluating similar changes in today's world." ...

Scripps scientists find potential for catastrophic shifts in Pacific ecosystems

...that asymmetrical and even irreversible ecological change is possible." Irreversibility means that if the e...ous condition simply through an equal but opposite change in temperature. That is, much like a financial market that takes much longer to recover than to cras...

Bobbing birds do it for a reason

... during the immobile phase and allows the birds to change their point of gaze and probably to gather a sense of space and of the relative positions of objects when the head is thrust forward. ...

Innovative collaboration brings Arctic science into the classroom

...ia, Canada, and Alaska), and addresses how climate change is impacting the cycles of water and chemicals in the environment. Dr. Holmes has also studied desert streams in the southwestern United States, stream/riparian ecosystems in France, and estuaries in Massachusetts. Dr. Holmes earned his Ph.D. from Ar...

Important discovery about second most fatal cancer

...and melanoma) # Frequent DNA methylation (chemical change which inactivates many genes) # Frequent but variable levels of DNA instability across different colorectal cancers occurring in members of same family # Origin in serrated polyps (considered previously to be completely benign) Colorectal cancer is ...

To Stop Evolution: New Way Of Fighting Antibiotic Resistance Demonstrated By Scripps Scientists

...esistance One thing that scientists would like to change about bacteria and cancer cells is their changeability. At the dawn of the 20th century, bacterial infections accounted for several of the leading causes of death in the United States. But then came the antibiotic revolution. Antibiotic "wonder drug...

'Smart drug' targets deadly brain cancer

...ic/NCCTG Research This discouraging prognosis may change as a result of the rational foundation for new therapies the NCCTG research provides. Study data showed that in 36 percent of patients suffering from recurrent glioblastoma multiforme, the new "smart" drug behaved as hypothesized: It found its target...

Bee mites suppress bee immunity, open door for viruses and bacteria

...cteria. The virus levels in mite-free bees did not change when the bee was injected with bacteria. One chemical, GOX or glucose oxidase, is put into the honey by worker bees and sterilizes the honey and all their food. If bees have mites, their production of GOX decreases. "As mites build up, we suspect t...

Insects, viruses could hold key for better human teamwork in disasters

...h each other, to produce "a coherent response to a change in their environment," said Robinson, an expert on honeybees. To date, no specific application has been found in computer science or engineering domains using bee behavior as a source of analogy. However, the researchers envision a smooth transition...

At the molecular level, the predator is the prey

...II, one of the paper's coauthors. "If the channels change too much or in the wrong way, they can't perform t... to an aromatic amino acid and causing enough of a change in the sodium channel's shape to impair its function. Three of the four Pacific Northwest snake popu...

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