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Tag: "direction" at biology news

UAB scientists discover the origin of a mysterious physical force

... lie. In the same way that a flag flutters in the direction the wind is blowing, at a microscopic level water molecules are gently attracted towards the direction in which an electric field is pointing. However, when the water is in contact with surfaces that cre...

New Technique for Tracking Gene Regulators

...o isolate 20-base-long-fragments, or “tags,?ineach direction from these cut sites. This gives the scientists a largenumber of very short DNA “tag?sequences, which all have the same startsequence of CATG plus 16 additional unknown bases. The scientists then“glue?together the tags into chains and sequence them.W...

The transparent organism: EMBLEM and Carl Zeiss give labs a unique look at life

... of the microscope slide, but resolution along the direction of the viewer was very fuzzy. In SPIM, a sample is passed through a thin sheet of light, capturing high-quality images layer-by-layer. The sample can be rotated and viewed along different directions, further eliminating the blurry and unwanted light ...

Gene variations explain drug dose required to control seizures

...comes, Goldstein said. The new findings provide a direction for a dosing scheme that could be tested in the clinic to assess whether pharmacogenetic diagnostics can improve dosing decisions, he added. In particular, it may be clinically relevant to determine whether physicians can safely increase drug doses m...

Scientists collaborate to assess health of global environment

...re scenarios and give governments and institutions direction that Mooney described as a consensus of the scientific community and a synthesis of all available information. Cause for concern "If you look at all the indicators of human well-being, globally averaged we're doing pretty well," Mooney said. "But i...

First 'atlas' of key brain genes could speed research on cancer, neurological diseases

...factors play a pivotal role in braindevelopment by direction the formation of neurons and supporting cellscalled glia from uncommitted progenitor cells. Until now, braintranscription factors had not been systematically isolated and theirlocations within different parts of the brain pinned down.The map should t...

DNA Recombination and Repair—A New Twist to RecA Function

...out strand exchange over long sequences and impose direction to the exchange, to bypass short sequence heteroge... filament assembly spreads rapidly in the 5'-to-3' direction once the first RecA molecule is loaded onto DNA. At the same time, ATP hydrolysis causes the release...

First real-time view of developing neurons reveals surprises, say Stanford researchers

...neurons only respond to images moving in a certain direction or near the left or right side of the visual field...cate their activity. Moving the square the reverse direction triggered a different population of neurons to light up. "At first we felt like we let some air out...

Scientists identify new model Of NK cell development

... of the journal Immunity, may offer clinicians new direction in determining how to manipulate this cell type in enhancing immune responses to cancer. "This study is fundamentally about understanding the immune system more fully so we can help patients," says Caligiuri. A major arm of the body's defense syste...

South America's vast pantanal wetland may become next everglades, UNU experts warn

...gional Environment Programme (UNU-PREP), under the direction of Dr. Paulo Teixeira de Sousa Jr. Straddling the territories of Brazil, Bolivia, and Paraguay, the Pantanal is a patchwork of lakes, lagoons, rivers, forest and forest islands. It is dry half the year and a shallow lake the rest, creating a unique ...

Falling ants glide back to trunk to avoid dangers of forest floor

...ally with success. What allows the ants to change direction so quickly is still a mystery. They have long, slightly flattened hind legs which, when combined with abdominal movements, might allow the ants to reorient in midair. They also have an unusual flattened head with flanges that could act as a rudder, D...

Molecular Motors Cooperate In Moving Cellular Cargo, Study Shows

...an optical trap technique to monitor the speed and direction of a peroxisome, and the force acting upon it. "By measuring force we can determine how many molecular motors are working together," Selvin said. "This will help us further understand these marvelous little machines." ...

Live fast, die young true for forests too

...the amount of carbon stored in forests, though the direction and magnitude of such potential changes are currently unknown and require more research. Atmospheric carbon dioxide, a heat-trapping gas implicated in climatic warming, increases as carbon storage in forests decreases, and decreases as carbon storage...

Flocking together: Study shows how animal groups find their way

...o subgroups with differing preferences about which direction to move. The overall group consistently chose the direction preferred by the bigger subgroup even if the two subgroups differed in size by only one member, demo...

Researchers discover chemical compounds that affect plant growth

...s that affect the ability of plants to alter their direction of growth in response to gravity, a phenomenon kno...e scientists found 219 chemicals that affected the direction of plant growth due to gravity. Further screens reduced this number to 34, then down to 4 chemicals,...

Cerebral navigation: How do nerve fibers know what direction to grow in?

...e growth cone collapse, steering the axon in a new direction or halting its growth. In chicken motor neurons whose ephexin1 was inactivated, the axons grew into the hind limb prematurely, indicating faulty axon guidance. "Understanding these pathways could help in understanding the process of nerve regenerati...

Scientists journey to southern Africa to unravel the secret world of elephant communication

...Connell-Rodwell took this discovery in a bold, new direction by proposing that low-frequency calls also generate powerful vibrations in the ground--seismic signals that elephants can feel, and even interpret, via their sensitive trunks and feet. Scientists have long known that seismic communication is common ...

Protein prevents detrimental immune effects of bacterial sepsis

...safer drugs." The data for annexin 1 provide a new direction for such therapeutics that delicately balances removal of bacterial toxins and damage to host tissues. ...

Science study holds implications for gene therapy and stem cell biology

...ntal Hematology at Cincinnati Children's under the direction of David Williams, MD, and in collaboration with Christof von Kalle, MD, PhD, a physician/researcher also noted for achievements in gene therapy. The team interacts closely with colleagues from the Laboratory for Experimental Cell Therapy, which Dr. ...

AIDS Public Awareness Campaign Expands Following Report Of Rapidly Progressive HIV

...often while using crystal methamphetamine. At the direction of Governor George E. Pataki, the State Health Department is expanding its $2.2 million HIV/AIDS marketing and media campaign to run additional HIV counseling and testing promotions in New York City, Long Island and Buffalo. The "Project Wave" televi...

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