Tag: "survival" at biology news

Brain Protein "Rescues" Neurons From Atrophy

...ve shown that neurotrophins generally increase the survival and growth of brain cells, or neurons. However, it was not known whether neurotrophins were, indeed, key substances that cause the brain to "wire" itself into certain functional patterns as a result of experience. The new studies, however, show that ...

Tumor Suppressor Gene Located In Liver Cancer Cells

...often far advanced at detection, and the five-year survival rate in the United States is only 4 percent. A report on this tumor suppressor gene appears in the December issue of Nature Genetics. Along with principal investigator Randy Jirtle, Gerald R. Hankins and Mary K. Washington of Duke University Medical...

Heat-loving Microbe Repairs Its DNA With Light

... infer thatUV radiation is a significant threat to survival in these high-temperature environments?" On one hand, it would seem logical that S. acidocaldarius , likemany organisms, should use the energy of the abundant, visibleportion of the sun's spectrum to reverse the harmful effects ofthe UV that sunligh...

Humble Pocket Gophers Shed Light On The Genetic Fortitude Of Cheetahs

...at loss and predation, are more vital to cheetahs' survival than genetic diversity. No one has found a direct ...sease resistance, physiological fitness, and their survival in the wild. Team members will present early results at the August meeting....

Duke Ecologist Says Logging Is Creating 'Mahogany Deserts'

.... It has co-evolvedwith fire." While such a stark survival strategy dooms most mahogany seeds to fail,not many successes are needed to carry on a species that may live and reproducefor 500 years or more, she added. But logging practices at odds with naturecould threaten the American mahogany's future, she wa...

New Finding Suggests "HATs" Are Key To Gene Activation Puzzle

...n at the right time and place is critical for cell survival and properdevelopment. Scientists have proposed many different mechanisms for how genes are turned on. Our finding provides strongsupport for one of these mechanisms." During much of its lifetime, the seven feet of DNA that resides in each of ou...

Beset By Human Competition, Penguins Must Take Marathon Food Trips To Avoid Starvation, A Researcher Finds

...cent from the previous year. The trick for penguin survival is getting beyond the first fledgling year, says Boersma. "Once they get to be adults, about 90 percent survive from year to year." Fishing fleets are not the penguins' only harbinger of death. Oil tankers also are plying the waters along the Argenti...

New understanding of crab populations may not bring fishermen's delight

...nted for internal crabpopulation dynamics--natural survival rates, egg-laying rates and cannibalism,all of which have been identified by field researchers as effective internalforces that help crabs rebuild populations when the numbers are too lowor reduce populations when the numbers are too high. Then the ...

Stopping "Cellular Suicide" Could Boost Production In Biotech Labs

...ct simply because theysense that a threat to their survival or merely somethingunfamiliar is lurking nearby. This process, called apoptosis or programmed cell death, is anormalbiological occurrence that can promote proper organ developmentand help toprevent cancer. But it's unwelcome in modern biotech labs, w...

Planned Burning In Forests A Boon To Several Species Of Birds In Illinois

...the impact of fireson the bird populations. Daily survival rate of nests in burned areas forrose-breasted grosbeaks, for example, was 96 percent. The rates in unburnedareas was 92 percent. Even such a small difference, Brawn said, can meana big difference in productivity and nesting success. "We haven't b...

Disease Takes Its Toll On Waterfowl Populations

...breeding grounds. Many factors will challenge the survival of these migrants, one of which is disease. According to Dr. Lynn Creekmore, hundreds of thousands of waterfowl are presently dying from avian botulism in flyway staging sites in southern Canada and the northern U.S. Dr. Creekmore is a wildlife d...

Limits Of Life On Earth: Are They The Key To Life On Other Planets?

...rid desert, with the goal of shedding light on the survival of microorganisms in similar extreme environments ...uct research on genetic components associated with survival in high-pressure conditions. In his studies, Bartlett will use so-called hyper-barophiles recently ...

Presence Of Protein Extends Life; Potential Aging Mechanism Found

...n was required to obtain along-term improvement in survival of the flies, said Tatar, now an assistantprofessor of ecology and evolutionary biology at Brown University. Hsp70 is one of the body's many "chaperone" proteins, which promote theproper folding and shaping of other proteins during biological proce...

First Selenium-Based Orally-Active Antihypertensive May Lead To New Family Of Therapeutic Agents

...enium deficiency can play a role indetermining the survival rate of persons infected with the HIV virus,the rate of certain cancers, and cardiovascular health. A landmarkstudy reported in the December 25, 1996 issue of the Journal of theAmerican Medical Association reported the potential of selenium inredu...

10,000-Year-Old Clues Suggest Future Forest Changes

...ll lakes and wetlands will dry up, threatening the survival of some species of birds,fish and other wildlife in B.C. In the future, for those searching for flowering alpine meadows, it looks like their hikes will be higher and farther....

UMass Researchers Announce Birth Of Genetically Modified Cloned Calves

...ants, and produce therapeutic proteins and improve survival in cell transplants. These cells are currently being tested in animals for treating such disorders as Parkinsons disease. Many other disorders, such as Alzheimers disease, Huntingtons disease, and diabetes, could be treated in the future using this t...

UF Researchers Identify Virus That May Cause Epidemic Disease In Sea Turtles

... linked to a serious tumor epidemic threateningthe survival of endangered sea turtles worldwide, according toa team of researchers at the University of Florida College ofVeterinary Medicine and the Marathon-based Turtle Hospital whofirst identified it. Scientists are racing to isolate the new virus so...

New Gene Alteration Find Points To Aggressive Leukemia Treatment

...ee times faster than thosewho don’t and their survival is slightly more than half that of patientswho don...ect maintained remission fornearly two years. The survival time for patients in the study who had thedefect was just under 14 months while patients without the...

Good Ergonomics Is Good Economics

...d increased likelihood of long-term organizational survival that ultimately is afforded. Clearly, to enable our profession to approach its tremendous potential for humankind, we, the professional human factors/ergonomics community, must better document the costs and benefits of our efforts and proactively sh...

Corn Rootworm Changing Behavior, Posing New Threat To Crops

...bean fields, the female rootwormbeetles ensure the survival of their larvae in the subsequent year becausethe ...h," Levine said. "Winter weather has been mild, so survival of the rootworm eggs willlikely be large. This could be devastating to fields with a known problemi...

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