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Tag: "such" at biology news

Simulations unravel outer membrane transport mechanism

...ition of Science. Transporting large molecules, such as vitamin B12, citric acid or other vital nutrien...eractions of multiple proteins in complex systems, such as the TonB-dependent transporter, Gumbart said. “As we get more computational power, we’re looki...

The insect vector always bites twice

...he efficacy of existing vector control strategies, such as the use of impregnated mosquito nets. Analysis of the host-vector relationship, up to now dealt with mainly from the angle of allergic responses to bites or in the search for veterinary vaccines, constitutes now an important research path for new ...

Hormone helps mice 'hibernate,' survive starvation

...on is known to have a range of beneficial effects, such as lowering blood pressure, cholesterol and glucose levels in the blood, Dr. Kliewer is interested in understanding how FGF21 impacts these processes. “We want to see if we can get some benefits of eating less without actually eating less,” he sai...

Research team identifies new Alzheimer's gene

... to examine the genetic components of a disease at such a high-level of detail. By utilizing the Affymetrix 500K Arrays, the study’s researchers rapidly produced a genetic map of each brain tissue sample and isolated the GAB2 gene relatively quickly. “This Alzheimer's disease breakthrough is another p...

Bigger horns equal better genes

...ompetitors. "We've learned from other species, such as deer and sheep, that horn or antler size can be a good indicator of an individual's quality and reproductive success," Coltman said. "We wanted to see if the same could be said for alpine ibex, and we found that it can." The researchers were pa...

Envisat captures first image of Sargassum from space

...ction is the process by which floating vegetation, such as phytoplankton and seaweed, absorb atmospheric carbon dioxide through photosynthesis and convert it into organic carbon. By absorbing half of the carbon dioxide emitted into the atmosphere, the oceans have a profound influence on climate, making th...

Largest synthetic gene ever built offers insights into anti-malarial drug resistance

...ess in yeast, a protozoan gene that contributes to such resistance. And it was no small feat. The gene the...uences of red cell infection. Natural products such as quinine, extracted from the cinchona tree, and leaves from the artemisinin shrub were the only op...

Loss of stem cells correlates with premature aging in animal study

...ced that the mice showed signs of premature aging, such as hair graying, hair loss, and osteoporosis, within three to four months. To be able to renew itself, most tissues have a reservoir of specific adult stem cells. These stem cells don’t divide as frequently as other cell types since they need to ...

Pesticides choke pathway for nature to produce nitrogen for crops

...in root nodules in the soil. Rotation legume crops such as alfalfa and soybeans require such interaction to naturally replace nitrogen levels that, in turn, benefit primary market crops like co...

Caribbean frogs started with a single, ancient voyage on a raft from South America

...e of habitat degradation and possibly other causes such as climate change. A recent global assessment of amphibians found that the Caribbean Islands have the highest proportion of amphibian species threatened with extinction. Hedges and coauthor William Duellman, a professor emeritus of the University o...

Studies to find better ways to preserve human eggs, ovarian tissue under way

...he tissue taken for some reason other than cancer, such as a hysterectomy for benign disease, says Dr. Son...ng. Slow cooling works well for simple tissue, such as sperm or even embryos, and for blood. “In blood, for example, conventional cryopreservation freez...

In mice, drug protects against diabetes and atherosclerosis

...fat diet, the expected signs of metabolic diseases such as atherosclerosis, type 2 diabetes, and fatty liv...ned that experiments were not designed to look for such effects rigorously. While it is not certain that the experimental compound or others like it can ...

Longer treatment benefits sleep apnea patients

...tion, patients were evaluated for daytime symptoms such as excessive daytime sleepiness using two widely accepted assessment tools, and for daytime functioning using a standardized test before treatment and after three months of CPAP therapy. The findings suggest that most patients should use CPAP for at...

New study finds genetically engineered crops could play a role in sustainable agriculture

...ale insecticide spraying can be avoided. Organisms such as ladybird beetles, earthworms, and bees in locales with “Bt crops” fared better in field trials than those within locales treated with chemical insecticides. “This is a groundbreaking study and the first of its kind to evaluate the current scien...

'Lucky 13' as new gene discovery offers further hope for childhood blindness

...ere marriage to first or second cousins is common, such as the Pakistani community. "If a parent is fou...ter we are placed to treat the diseases by methods such as that recently announced at Moorfields Eye Hospital – also supported by the BRPS."...

Researchers shed light on shrinking of chromosomes

...ortening of chromosomes, allows the cell to handle such huge amounts of genetic material during cell divis...condensation’ at later stages helps to disentangle such chromosomes and acts as a back-up mechanism to rescue separation defects.” The EMBL researchers fo...

U-M researchers discover gene switched off in cancer can be turned on

...it many different cancer types. Popular new drugs such as Herceptin and Gleevec more effectively treat cancer by targeting genetic mutations that express themselves in large amounts, causing cancer to develop. But cancers also arise because genes that control growth are turned off. While researchers can ...

Now, self-healing materials can mimic human skin, healing again and again

...roved design would allow new healing chemistries – such as two-part epoxies – to be exploited, which could ultimately lead to unlimited healing capability. “Currently, the material can heal cracks in the epoxy coating – analogous to small cuts in skin,” Sottos said. “The next step is to extend the desig...

Researchers examine carbon capture and storage to combat global warming

...The practice could transform heavy carbon spewers, such as coal power plants, into relatively clean machin...pturing carbon dioxide from small, mobile sources, such as cars, would be more difficult, Orr said. But with power plants comprising 40 percent of the world...

Undergraduate research shows leaderless honeybee organizing

...s, bee societies follow organizational principles, such as following social rules (like human customs and ...il of elders. Instead, critical strategic choices, such as the assessment that it is time to divide the colony and swarm, appear to be decided by the dynami...

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