Tag: "pass" at biology news

Günter Blobel wins 1999 Nobel Prize for physiology or medicine

...gnals and allow the appropriate proteins either to pass through orto lodge within the membrane. In its citation, the Karolinska Institute said "the principles discovered anddescribed by Günter Blobel turned out to be universal, operating similarlyin yeast, plant, and animal cells. A number of human ...

Gene mutation tied to deafness found in African-Americans and Caucasians

...junctions in cellmembranes that allow molecules to pass through to adjacent cells. In the innerear, gap junctions play an important role in the physiology of hearing. Auditory signals emanating from hair cells deep within inner ear canals dependupon the flow of potassium. Gap junctions allow potassium to ...

Errant nerve cells risk a clockwork death

...e, axons receive support from neurotrophins asthey pass through the region of the intermediate target, rather than when theystop at the target, as occurs in the traditional neurotrophic mechanism. The discovery of the en passant mechanism was made during experimentsin which Tessier-Lavigne and Wang wer...

Crack open an egg and cure a disease

...ead on its rival because it has already managed to pass on the interferon gene to further generations of birds. With hens producing an average of 200 eggs each per year, and 100 milligrams or more of a drug in each egg, both companies believe the yields could be large and lucrative. The companies smuggle...

USGS reports that West Nile virus goes beyond crows

...e same mosquito subsequently bites a human, it can pass the virus to a human host. Like St. Louis encephalitis, West Nile virus is not transmitted directly from person to person or from birds to persons. This is the first time West Nile virus has been recognized in the United States or any other area of ...

Mutation on Y chromosome stops sperm production

...ture of sperm-precursor cells.Sperm cells normally pass through these precursor stages over a period of 65 days, as they movethrough the convoluted seminiferous tubules that wind through the testes. "I expected that these mutations would cause interruptions at discrete points in the 65-dayprocess," said ...

Fall Meeting: updated press conferences and special events

...s the Equator around 10:30 AM, local time, on each pass around the Earth, providing morning data on a wide range of geophysical phenomena. Sasha Jones, the St. Louis high school student who coined the name, Terra, in a contest sponsored by AGU and NASA, will attend the launch. The live broadcast of the la...

Antibacterial implants could prevent infections, save patients' lives

...e. When a device is implanted in the body, fluids pass through that thin, permeable outer coating and dissolve the polyethylene glycol, which makes the polyurethane porous. The antibiotic then leaches out of the polyurethane. The coating acts as a barrier to the antibiotic, controlling the rate at whic...

Distance between atoms is key to iron protein function

... recent work has shown that many of these proteins pass through a peroxide-bridged intermediate state as part of their reaction with oxygen. Sometimes the peroxide-bridged intermediate works as part of an enzyme to activate oxygen for critical reactions, such as synthesizing DNA building blocks or ...

University of Georgia professor writes first book on phylogeography--a field of study that he helped found

...f mitochondrial DNA," said Avise, "but years would pass before relatively clear answers to some of the questions would be forthcoming." By the late 1970s, the study of mtDNA was generating considerable excitement in laboratories around the world. Early on, Avise had the idea that mtDNA might be a wonderf...

Deadly to cattle and humans, prions may help other organisms survive, researchers find

...ritance, respond to changes in the environment and pass these changes on to its progeny," said Jonathan Weissman, assistant professor of cellular and molecular pharmacology at UCSF and senior author of the Cell paper. The discovery of a new prion-forming region in a protein not before associated with ...

Prions are modular

...t can exist in two different conformations and can pass their particular conformation from one generation to the next without any change in DNA--are modular. This discovery may convert these esoteric proteins into one of the most valuable tools in modern molecular biology. A prion is a normal prote...

UB researchers develop novel way to study dynamics of receptor proteins

... new way to study the dynamics of proteins as they pass through this transition state. "To understand how a protein works, it is very important to understand how it moves and changes," said Anthony Auerbach, Ph.D., UB professor of physiology and biophysics, and senior author on the paper. Claudio Grosma...

Proteins that bind to sperm offer clues to male fertility and possible male contraception

...to the top of each testicle. As they mature, sperm pass through the epididymis and into another tube, the ...ilize an egg very poorly if at all. And after they pass through, they're more ready to fertilize an egg," said Susan Hall, PhD, research assistant professor...

Brain cell 'chorus' appears as attention increases

...n't necessarily guarantee that the nerve cell will pass on the message. "If all the neurons upstream are f...increases the possibility that the nerve cell will pass the message on downstream," says Hsiao, an associate professor of neuroscience."We were lucky that t...

Beetle uses fecal defense against predators

...with their own feces, persuading most predators to pass them by, Cornell University biologists have discovered. But at least one kind of one predator is not repulsed by beetle feces, Thomas Eisner and Maria Eisner report in the March 14 issue of Proceedings of the National Academy of Sciences (Vol. 97,...

Low blood levels of HIV reduce risk of heterosexual transmission

People with HIV infections are less likely to pass the virus to an opposite sex partner if they have low levels of the virus in their blood, according to a new study by researchers from Johns Hopkins, the National Institutes of Health, Makerere University (Kampala, Uganda), the Uganda Virus Research ...

Improvement in some patients who underwent neuronal transplantation following stroke, according to study by University of Pittsburgh researchers

...ons implanted at three sites along a single needle pass within the basal ganglia. The remaining eight pat...eceive either two million neurons along one needle pass or a total of six million neurons implanted along three trajectories. Assessment of safety and...

Gorillas in the bits: remote sensing boosts efforts to protect mountain gorillas & rebuild Rwanda's economy

...nsing. Back at their university, the Rwandans will pass on their knowledge to additional faculty and students, using GIS workstations provided by Georgia Tech through the Georgia Research Alliance (GRA). "We will set up the first center for GIS and remote sensing at the university, and...

Scientists on scent of better coyote management

...e disease. They can transmit it to dogs, which can pass it to humans. Although the new coyote management approach using the new fragrances may take several years to develop and apply, researchers believe that it will ultimately cut down on lethal methods currently in use, such as shooting. Farmers are par...

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