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Tag: "upon" at biology news

Stretching DNA to the limit

...about how the elasticity of DNA strands is altered upon exposure to UV light. Now a group of researchers a...easure changes in the mechanical properties of DNA upon irradiation with UV light. Piotr Marszalek and his colleagues have conducted single-molecule force ...

Pacific Rim researchers to collaborate on distributed bioinformatics analysis of avian flu

...availability of a central repository that is built upon distributed information and data storage not only allows one to collect information more effectively, but also makes the data immediately available to researchers worldwide," said Kai Nan, director of CNIC’s Network Technology and Applications Resear...

Lower carbon dioxide emissions from coal-fueled power plants possible with technology development

...ustrial emissions. For these studies, he will draw upon two decades of experience developing and testing similar technology to remove hydrogen sulfide and carbon dioxide from natural gas. Rochelle will share one third of the TXU funds with other colleagues in the university’s College of Engineering an...

Minuscule molecules pack a powerful punch

...for human health and disease. "Our work builds upon the sequences of the human and mouse genomes, the power of computer analysis and microarray work and exemplifies why whole-organism research can bring understanding that cannot be developed in any other way." The study emphasizes the value of the ...

Ape gestures offer clues to the evolution of human communication

...ommunicate an entirely different message depending upon the social context in which it is used. "A chimpanzee may stretch out an open hand to another as a signal for support, whereas the same gesture toward a possessor of food signals a desire to share," said Pollick. "A scream, however, is a typical ...

Overfishing large sharks impacts entire marine ecosystem, shrinks shellfish supply

... "With fewer sharks around, the species they prey upon ?like cownose rays ?have increased in numbers, and...d co-leader of the study. The research builds upon an earlier study by Myers and Baum, published in Science in 2003, which used data from commercial fi...

Nonvenomous Asian snakes 'borrow' defensive poison from toxic toads

...ence of toxins in the snakes' neck glands depended upon their access to the toads. Snakes without the borrowed toxins were more likely to turn and flee from danger than to hold their ground and perform a toxin-releasing defensive maneuver. "Sequestration of toxins in a specialized [neck gland] struc...

Molecular motors and brakes work together in cells

... cell division -- and act as a railroad, of sorts, upon which molecular motors move protein packages for waste removal and nerve transmission. In the Cell study, the investigators, working with fission yeast cells, showed that stable end-to-end arrays of microtubules can be achieved by a balance betwe...

Computer with brain connections changing quality of life of paralyzed

...tentional thoughts and imagery can rarely be acted upon physically and, therefore, are rarely followed by a stimulus. The research suggests that as the disease progresses and the probability for an external event to function as a link between response and consequence becomes progressively smaller, it may ...

Nobel Laureate finds 'elegant' explanation for DNA transcribing enzyme's high fidelity

...lignment with the NTP that is critically dependent upon the base, sugar, phosphate and location when the trigger loop swings into position,?Kornberg said. “If it is misaligned even slightly, that set of contacts cannot occur.? As a consequence of that alignment, to angstrom (a unit of length equal to one...

Evolution of influenza A virus

...as vaccine strain selection then becomes dependent upon intensive surveillance, whole-genome sequencing, and phenotypic analysis....

Triple threat: World fin trade may harvest up to 73 million sharks per year

...f catches estimated by Clarke and her team depends upon the size and status of each population. "One of the most productive sharks is the blue shark, and it appears that the catch rate is near the maximum sustainable level," says Clarke. "But such assessments were not available for other, less product...

Vaccine-producing 'plant-factories'

... these can be used to produce oral vaccines which, upon being ingested, will be able to immunise against diseases. Moreover, this discovery opens the door to the design of protein-manufacturing plants of great interest therapeutically and in the development of vaccine antigens. This discovery, published ...

Good times ahead for dinosaur hunters, according to U of Penn scientist's dinosaur census

The golden age of dinosaur discovery is yet upon us, according to Peter Dodson at the University of Pennsylvania. In a forthcoming issue of the Proceedings of the National Academy of Sciences, Dodson revises his groundbreaking 1990 census on the diversity of discoverable dinosaurs upward by 50%, o...

Researchers link ocean organisms with increased cloud cover and potential climate change

...al plants, Nenes said. The researchers stumbled upon the phytoplankton-cloud connection quite accidentally. "While looking at the satellite pictures, I noticed that cloud properties over large phytoplankton blooms were significantly different from those that occurred away from the blooms," recalled Me...

Scientists design simple dipstick test for cocaine, other drugs

...in saliva, urine or blood serum. The test is based upon DNA-gold nanoparticle technology, and can be packa...to those used for home pregnancy tests. "Building upon our earlier work with lead (Pb) sensors, we constructed colorimetric sensors that are based on the l...

Teenager moves video icons just by imagination

...d forth across the bottom of the video screen. Row upon row of video aliens march back and forth across the screen, slowly coming down from the top to the bottom of the screen. The objective is to prevent any one of the aliens from landing on the bottom of the screen, which ends the game. The player has a...

Seals protect brain, conserve oxygen by turning off shivering response on icy dives

...variety of circumstances. Doctors often are called upon to treat people who have suffered accidental hypothermia, for example, as a result of falling into the ocean or becoming lost during the winter. In addition, several hundred thousand people die or are irreversibly injured each year following cardiac ...

First biomarker for human sleepiness identified in fruit flies

...es of sleep debt, its measurement in humans relies upon unreliable subjective rating scales and expensive, often impractical sleep laboratory testing," Duntley says. "Simple, easily accessible biomarkers for sleep debt in humans would revolutionize our ability to conduct research on the causes and consequ...

What's next for gene therapy? Plastic

Gene therapy depends upon foreign DNA, even viruses, to deliver genes, therapeutic proteins, or medicine to cells within the body. Many scientists are looking for better chaperones across the cell membrane. Virginia Tech researchers think polymer molecules can be created to ...

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