Tag: "challenged" at biology news

Newly Discovered Gene Halts Cell Division and May Have Cancer Link

...ells. "If MAD2 is defective and the checkpoint is challenged -- either by drugs or environmental stresses -- cell division can continue out of control and leave some new cells without a copy of each chromosome, which can lead to cancer," Dr. Benezra says. The MAD2 checkpoint appears to plays an essential role...

New Vaccine Blocks Viral Entry In Cattle, May Have Implications For Human Vaccines

...erd. After vaccinating the animals, the scientists challenged each cow with ten million units of BHV-1. "That'...which he injected the vaccine into muscle. When he challenged those cattle with the virus, the vaccine did not protect them. They became infected with BHV-1 and s...

Discovery Of Genetic Pathways May Provide New Ways To Combat Candida Infections

...lly ineffective against filamentous Candida. When challenged by Candida strains with both pathways knocked out, macrophages emerged victorious. This was good news to researchers, but the real test would come when the Fink lab scientists, in collaboration with scientists at Schering Plough, began experiments wi...

R-Type Channels - A New Type Of Calcium Channels Controlling Signal Transduction Between Neurons In The Brain

...d by the nerve impulse. This view was challenged by the neuroscientists Ling-Gang Wu, J. Gerard G. Borst and Bert Sakmann at the Max Planck Institute for Medical Research in Heidelberg, Germany. They discovered as reported in the April 14 issue of PNAS (Vol. 95, Issue 8) t...

Research Into Cockroach Behavior Could Lead To Better Baits

...roach attractant to handle," she said. McCoy, too, challenged the assumption that roaches stumble into dinner. In his experiments, he starved roaches so hunger would overcome their natural first instinct toward curiosity. He found they exited their hiding places, sampled the air, then moved steadily toward the ...

Ionotropic Glutamate Receptors Share Tetrameric Structure With The Voltage GatedPotassium Channel

...activated receptors. This view is now challenged by a counting method developed by Christian Rosenmund, Yael Stern-Bach and Charles Stevens. The key observation upon which this counting method is based is, that the flow of current through the receptor channel...

News Backgrounder: Duke Primate Center Successfully Fosters Mysterious Aye-Ayes

... minerals. For onething, the animals weren't being challenged to forage, which would haveincreased their feeding. Another major dietary problem was that, like children, the animalsweren't eating enough of what was good for them. They greatly preferred fruit,even though the fruits provided too much carbo...

Gene Therapy Animal Study Offers Hope For Some Neurodegenerative Diseases

... field ofgene therapy, which has been particularly challenged by disorders caused byabnormal, or mutant, proteins, so-called autosomal dominant diseases, saidLaVail. Most gene therapy approaches have focused on diseases that occur when the twocopies of a particular gene fail to produce, or fail to produce suffi...

Veterinary Researchers Identify Accomplice Of Calf-Killing Parasite

...ning the parasitic disorder, where hostanimals are challenged to develop an immunological response to the parasites.Lindsay estimates such an approach could take five to ten years to develop....

Life In Womb Determines Adult Health

...organs it will need in later life. A nutritionally challenged fetus also is believed to grow a larger placenta as ameans of securing more nutrients from the mother's blood. Thus, the two mostobvious signs of fetal malnutrition are a low birth-weight baby and adisproportionately large placenta. However, an un...

NSF's Highest Honor For New Faculty Fosters Integration Of Research And Education

...ban culture; and how thesebeliefs are supported or challenged by the culture of urban poverty includingthe culture of urban schooling and life in low-income shelters. Gain an understanding of the beliefs and knowledge that beginning teachershave. Create an academic program in urban science education at Teache...

A Real Smart Asp: Snakes Show Surprising Ability To Learn

...ry issue of AnimalBehaviour. Holtzman's study challenged 24 captive-bred corn snakes(species Elaphe guttata guttata) to escape from a black plastictub the size of a child's wading pool. Cards mounted on thearena's walls and tape on its floor provided the snakes withvisual and tactile cues to find their goa...

New Edition Of Ecological Monographs Is Now Available

...tterns ofexotic plant invasions that have recently challenged some of ecology's existingparadigms. It has been widely hypothesized that diversity begets stability.Areas of low diversity were thought to be less complex systems, while highlydiverse areas were considered more complex and thus more efficient in usi...

Roll Up Your Sleeves And Join Us In The Field, Says Fish And Wildlife Service To Conservation Biologists

...and WildlifeService director Jamie Rappaport Clark challenged her agency to pioneer theecosystem approach. Now she challenges conservation biologists to help them implement it. "We expect that you will roll up your sleeves, join us in the field, and workwith our land managers on ways to improve our approach," ...

UCSF-Led Team Offers New Insight Into Neurological Basis Of Dyslexia

...adults who wereof normal intelligence but severely challenged by reading, spelling and writing. Results were compared with those recorded in seven adults of normalintelligence who were competent readers. The dyslexic adults performed poorly on standardized reading tests. And, as hasbeen shown to be the case w...

IFT experts inform and caution consumers about dietary supplements

..."Prior to DSHEA, these ingredients could have been challenged by the FDAas unapproved food additives, [but they are now] exempt from additiveregulations applicable to conventional foods," note summary authors Mary EllenCamire, Ph.D., University of Maine, and Mark A. Kantor, Ph.D., University ofMaryland. ...

Particulate matter causing air pollution

...e, EPA's 1997 revised standard for PM 2.5 is being challenged infederal court by trucking associations and other industry groups. The newstandard calls for an annual PM 2.5 average set at 15 micrograms per cubic meterand a 24 hour PM2.5 average of 65 micrograms per cubic meter. The new standard was pr...

CU-Boulder professor documents controversial history of Rocky Flats

...ant managers and workers; and citizen activistswho challenged the plant's very existence. It is also about a community that profited from thousands of jobs and contractsbut now faces long-term environmental and health risks. "The story of Rocky Flats epitomizes mistakes made in the 20th century thatrested on th...

PricewaterhouseCooper's forecasts health care in 2010

...hough healthcare has been slowto adapt, it will be challenged by new competitors that are savvy in the ways ofe-health. Insurers, followed by hospitals, are viewed as the industry segmenthaving the most opportunity to leverage the benefits of e-business, according tothe HealthCast 2010 survey. 3. Genomics Shif...

Cooperation, not competition, to usher in new era of federally funded cancer research

...cept arose after NCI director Dr. Richard Klausner challenged national experts to recommend ways to speed research findings in utilizing the powerful mutant mouse technology. He particularly wanted recommendations for using the mouse to learn more about human cancer development with the aim to develop predictiv...

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