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Tag: "change" at biology news

From a Few Wild Ancestors, a Citrus Cornucopia

...curators, since a few missing or added letters can change the way a specimen is classified and managed -- and possibly how it will be used. “For example, one accession planted in the field,?says Krueger, “was considered to be a Rangpur lime, or Citrus limonia. But when you walked past it, you’d think for s...

Clearing jams in copy machinery

... clamp may sense when Pol III stalls, triggering a change in beta that pulls the polymerase from the primed site, allowing Pol IV to take over synthesis," O'Donnell says. Or, Pol III, upon stalling, may loosen its grip on the template and allow Pol IV to bind the primed site instead. ...

Gene for immune deficiency syndromes found

...d again." The gene discovery will immediately not change therapy, Geha adds. "For the time being, it's prophylactic antibiotics or IV immunoglobulin infusions every three weeks," he says. Geha's team previously demonstrated that TACI binds to two other proteins made by cells in the respiratory and gastroi...

Protein amplification in melanoma is possible drug target

...d again." The gene discovery will immediately not change therapy, Geha adds. "For the time being, it's prophylactic antibiotics or IV immunoglobulin infusions every three weeks," he says. Geha's team previously demonstrated that TACI binds to two other proteins made by cells in the respiratory and gastroi...

Researchers Create DNA-Based Sensors for Nano-Tongues and Nano-Noses

...binds to a target molecule, there will be a slight change in the electric charge near the nanotube," Johnson said. "The nanotube will then pick up on that change, turning it into an electric signal that can then be reported." According to Johnson, an array of 100 sensors with different response characteris...

Sensor web simulation investigates technique to improve prediction of pollution across the globe

...t but complementary capabilities. The sensors then change their observing strategy accordingly, to target and then collect data for a particular event." Talabac offered the analogy of a search-and-rescue team whereby the unique skills of firefighters, police officers, and paramedics are brought together to ...

Stressed cells spark DNA repair missteps and speed evolution

...essed by starvation, sometimes resulting in a rare change that benefited the bacteria, it was controversial. In a report in the current issue of the journal Molecular Cell, she and her colleagues describe not only how it happens but also show that this only occurs at a special time and place in the stresse...

Scientists create digital bacteria to forge advances in biomedical research

...en you changed the level of that protein, it would change the sensitivity of the cell," Emonet said. Subsequent laboratory experiments came out exactly the same way. Sometimes, though, conducting the actual experiment would be undesirable. Preparing for a bioterrorism attack is one example. "You can actual...

Nanotubes inspire new technique for healing broken bones

...the growth of bone tissue. The new technique could change the way doctors treat broken bones, allowing them to simply inject a solution of nanotubes into a fracture to promote healing. The report appears in the June 14 issue of the American Chemical Society's journal Chemistry of Materials. ACS is the worl...

Retina adapts to seek the unexpected, ignore the commonplace

...emporal receptive fields of retinal ganglion cells change after a few seconds in a new environment. These changes are adaptive, improving predictive coding by enhancing the ability of these receptive fields to pick out unusual features." While manipulating the visual scenes faced by salamanders and rabbits...

Errors in the measurement of global warming corrected

...n the atmosphere. The key to the error in climate change estimates lay in instrument design, according to this study. With exposed sensors, measurement taken in daylight read too warm, and while solar heating had a measurable impact on the earlier designs, the effect became negligible in more recent design...

Did humans cause ecosystem collapse in ancient Australia?

...t happened. The remains showed evidence of a rapid change of diet at the time of the extinctions. The resear... other bands. Based on the evidence, human-induced change in the vegetation is the best fit to explain what happened at that critical juncture." ...

Environmental lessons from tsunami as world's coastal population doubles

...al reefs and coastal mangrove forests can adapt to change and recover from storms and floods and still provide services of protecting the coast and absorbing pollution. But once these ecosystems are put under pressure by coastal development, they may lose their resilience. Similarly, if communities are mor...

Skull study sheds light on dinosaur diversity

...he end of the dinosaur era." Wilson wonders if the change in locomotion---from typical sauropod narrow-gauge walking to titanosaur wide-gauge walking---corresponded to lifestyle changes, such as different feeding habits. But without skulls to study, it has been hard to draw conclusions about how and what ti...

Forsyth scientists find three bacteria associated with oral cancer

... The Forsyth scientists posit that oral cancer may change the oral ecology, thus allowing certain bacteria to colonize more rapidly than others. However, according to J. Max Goodson, DDS, PhD., Director of Clinical Research at Forsyth and a co-author of the study, "We cannot rule out the possibly that the ...

Learning how SARS spikes its quarry

... that the spike protein undergoes a conformational change that enables the virus to fuse with the host cell. "When there's a conformational change, it gives you an opportunity to explore the possibility of antiviral therapeutics," said Harrison. "When you have two conformational structures, you can think ...

Exercise aside, genes may ultimately dictate seniors' mobility

...ise and that the implications of that response may change as they age. "In our study, the II genotype is associated with increased fat in the leg muscles," Kritchevsky said. "Now energy storage near muscles may benefit young athletes engaged in endurance activities, but in older persons, accumulation of le...

Aquatic plants may hold key to advancing plant disease management

...quatic plants respond to plant disease and climate change may have applications for managing land-based agri...ses continue to provide insight as to how climatic change influences disease development. "Emerging marine diseases, such as coral diseases, are creating a ma...

Genetic variation alters response to common anti-clotting drug

...and too little effect," explained Rettie. "A small change in dose can have quite a large effect on blood processes." For example, too high of a dose can result in excessive bleeding while too little of a dose could allow dangerous blood clots to form. Doctors primarily use information about a patient's sex...

Tropical Deforestation affects rainfall in the U.S. and around the globe

...erable attention, this study shows that land-cover change is another important parameter that needs to be considered in climate policies, especially since deforestation rates in tropical Africa, Southeast Asia, and South America have remained constant or have increased over the past two decades. Land-cover ...

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