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Tag: "hold" at biology news

Transfusion expert urges wider use of filtered blood

...ely, and some practitioners are not convinced they hold many risks. But doctors at the University of Rochester, leaders for two decades in the study of "transfusion immunomodulation," believe otherwise. Giving donor blood to someone, Blumberg said, is akin to a temporary organ transplant. In many cases th...

Jefferson scientists find rabies-based vaccine could be effective against HIV

Rabies, a relentless, ancient scourge, may hold a key to defeating another implacable foe: HIV. Scientists at Jefferson Medical College in Philadelphia have used a drastically weakened rabies virus to ferry HIV-related proteins into animals, in essence, vaccinating them against an AIDS-like diseas...

Researchers learn what sparks plant growth

...onditions are right to seize the day for growth or hold back under less opportune conditions. More study is needed to determine all of the cues that spark the intimate dialogue between the cells of the epidermis and the inner cells of the shoot. "Our study says that the major target tissue in the shoot...

Nanotextured implant materials: blending in, not fighting back

...sed in stents ?those springy little cylinders that hold open once-clogged arteries ?and artificial blood vessels. Currently only about 30 percent of small diameter blood vessel grafts (less than 6 mm diameter) last more than five years, and up to 20 percent of stents need to be replaced because the artery...

Type of stem cell found to reside in transplanted lungs

...he tissues of the adult lung ?something that might hold true for other organ systems as well. "Potentially the most important outcome of our finding is that it could lead to an understanding about therapeutic options using MSCs that reside in adult organs," Lama continues. "These lung-derived cells are...

NIAID DNA vaccine for H5N1 avian influenza enters human trial

...investigational vaccines evaluated by the VRC that hold promise for controlling other viruses, such as HIV, Ebola, SARS and West Nile. "An effective H5N1 influenza vaccine would provide a potentially life-saving advance against a global health threat," notes NIAID Director Anthony S. Fauci, M.D. "Mor...

How trees manage water in arid environments

...low that water is scarce to begin with and hard to hold onto when there is a rare cloudburst. Rain that collects in puddles is quickly sucked up by evaporation into the dry air. Most of the rest runs off before it can soak into the ground. Maintaining an adequate supply of water is a constant challenge, a...

Remote sheep population resists genetic drift

...the more genetically diverse mouflon on the island hold over their less genetically diverse cousins. "This herd certainly challenges our understanding of genetic drift," he said. "And I think it shows us the power of natural selection." Coltman and his colleagues, including Renaud Kaeuffer and Deni...

Nanotechnology meets biology and DNA finds its groove

...e. But in solution, DNA, the genetic material that hold the detailed instructions for virtually all life, is a twisted knot, looking more like a battered ball of yarn than the famous double helix. To study it, scientists generally are forced to work with collections of molecules floating in solution, and ...

Stem cells act through multiple mechanisms to benefit mice with neurodegenerative disease

Human embryonic stem cells (hESCs) hold great promise for benefiting degenerative diseases, and do so by invoking multiple mechanisms. Such cells can be grown in a manner compatible with clinical use (i.e., without animal feeder layers) and even without the need for immunosuppression. Thes...

Reading hidden intentions in the human brain

...dding or subtracting two numbers and were asked to hold in mind their intention until numbers were presented on a screen, along with a choice of outcomes (one of which was correct for the addition choice, one correct for the subtraction choice). Subjects then selected the correct answer according to their...

Scientists clone mice from adult skin stem cells

For cells that hold so much promise, stem cells' potential has so far gone largely untapped. But new research from Rockefeller University and Howard Hughes Medical Institute scientists now shows that adult stem cells taken from skin can be used to clone mice using a pro...

Study to explore using magnets to correct 'sunken chest'

...ild the chest and the insertion of metal struts to hold the chest in place while it heals. Complications can occur because the struts are under significant pressure, and the painful recovery can take months. "The problem with present techniques is that they attempt to reshape the chest wall in one big ...

Scientists unveil piece of HIV protein that may be key to AIDS vaccine development

...the blood of people whose immune systems appear to hold the virus at bay for long periods of time—b12 is one of these rare, broadly neutralizing antibodies. Until now, no one had succeeded in determining the detailed structure of b12 in complex with gp120. It was extremely difficult to crystallize b12 ...

Biologists produce global map of plant biodiversity

...Climate change may drive to extinction plants that hold important cures before we find them," says Kreft, a biologist at the Nees Institute for Biodiversity of Plants at the University of Bonn. "Ecological research like ours that captures complex diversity - environment relationships on a global scale may...

National Academies advisory: Invasive aquatic species in the Great Lakes

... May 7, a National Research Council committee will hold a meeting in Toronto to gather information on trade in the Great Lakes region and ways to eliminate further introductions of nonindigenous aquatic species into the lakes by vessels traveling the St. Lawrence Seaway. The committee's final report will ...

Scientists identify specific enzymes that make meningitis hard to fight

... conditions with a high mortality rate, which take hold quickly and are difficult to treat - sometimes resulting in extreme measures such as limb amputation. When the meningitis bacteria enter the bloodstream, the body's natural defences send white blood cells to fight the infection. They ingest the b...

Magnetic system could be key to surgery without scars

...elevision show featuring teens who used magnets to hold studs on their lips to avoid getting their lips pierced. “Once you think about, it’s an obvious thing,?said Dr. Cadeddu, whose team of urologists and surgeons worked with engineers from UTA’s Automation and Robotics Research Institute and the Texa...

Engineering the heart piece by piece

...mong the hurdles: determining which types of cells hold the most potential, and finding the best way to grow those cells to form viable cardiac tissue that is strong, long-lasting and structured at a cellular level like natural tissue. The new article reviews the current state of cardiac tissue enginee...

Fish can determine their social rank by observation alone, study finds

... "Males that repeatedly lose fights are unable to hold territories and consequently descend in social status," the authors wrote. "Success in aggressive bouts is therefore crucial to male reproductive fitness, and the ability to infer the relative strength of rivals before engaging them in potentially co...

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