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Tag: "leave" at biology news

A dichotomy in migration patterns found for sea turtles in east Atlantic

...d dichotomy in turtle behavior: While some turtles leave the nesting grounds to feed on bottom-dwelling sea life in shallow coastal waters, others leave Cape Verde to roam the much deeper open ocean along the African coast and exhibit a distinct feeding...

Corn waste potentially more than ethanol

...or cattle feed or corn on the cob, farmers usually leave the stalks and stems in the field, but now, a team of Penn State researchers think corn stover can be used not only to manufacture ethanol, but to generate electricity directly. "People are looking at using cellulose to make ethanol," says Dr. Bruce...

Light guides flight of migratory birds

...ould be recorded; songbirds in migratory condition leave tracks or scratches on the sides of the funnel as they attempt to take flight in the migratory direction. A problem arises, however, because funnels block the lower 20 degrees of the sky. In the only two experiments (out of 30 or so) carried out duri...

Think fast! Rice undergrad unlocks nerve speed secret

...he act that opens the door for neurotransmitter to leave the neuronal cell ?was inhibited by complexin. "By halting fusion partway, complexin essentially shortens the response time for signal transmission," said Schaub, who will begin graduate school at Stanford University in the fall. "The nerve cell ca...

Dolphins at risk

...g a ramped warning signal to give dolphins time to leave the area before work commences. Dr David also calls for further research into the reactions of marine mammals to industrial noise to help mitigate future effects in relation to the increase in off-shore industry, such as the construction of wind fa...

South Pacific plant may be missing link in evolution of flowering plants

...g a ramped warning signal to give dolphins time to leave the area before work commences. Dr David also calls for further research into the reactions of marine mammals to industrial noise to help mitigate future effects in relation to the increase in off-shore industry, such as the construction of wind fa...

Pathway toward gene silencing described in plants

.... The AGO4-siRNA-NRPD1b complex is then thought to leave the nucleolus, acquire the second-largest Pol IV subunit, NRPD2, which serves both Pol IVa and Pol IVb, and then seek out the DNA sequences that match the siRNAs. At these sites, the chromatin remodeler DRD1 presumably bulldozes histones and other p...

Arctic expedition will investigate alien-like glacier

...leeson and U of C graduate student Marie-Eve Caron leave for the glacier on June 21. From Ottawa, they will fly to Resolute, where they will be flown to the Eureka research station via Twin Otter airplane. The team will then reach the glacier by helicopter and set up a small camp near the base of the glaci...

Researcher gives hard thoughts on soft inheritance

... Packing DNA Epigenetic mechanisms leave DNA sequence unaltered but can affect DNA by preventing the expression of genes. Richards cites a study that shows certain epigenetic alleles can be inherited that affect tumor suppressor genes. His own work in plants has often shown epigenetic info...

The molecular post office inside the cell

...e cell. Secretory proteins are those that later on leave the cell, like anti-bodies. Membrane proteins are proteins embedded into the cell's membranes - for example, signalling receptors. One particular molecular complex is important in protein sorting. It is made from an active ribosome - that is, the pro...

Immune system police learn early and sometimes badly

...tors on all types of T cells before and after they leave the thymus, researchers found regulatory T cells are very diverse and able to recognize endogenous tissue and invaders, Dr. Ignatowicz says. Unfortunately, the cells also may not learn to recognize all endogenous tissue which, along with environmen...

Clot-busting drug helps revive cardiac arrest patients

...ercent were revived, but none lived long enough to leave the hospital. The patients who were treated with tenecteplase had been receiving ACLS measures for a mean of 30 minutes and received a mean of eight doses of standard medications. "The study supports the use of fibrinolytic drugs in select cases ...

Study defines effective microbicide design for HIV/AIDS prevention

...ocioeconomic inequities between the sexes also can leave women more susceptible. "In many cases, women lack control over their abilities to protect themselves against the virus," Katz said. "Microbicide development is a response to the demonstrated need for new female-controlled methods for HIV prophylax...

Combination therapy shows promising results in patients with advanced lung cancer

...se they target what is broken in a cancer cell and leave the healthy cells alone, therapies like Tarceva cause fewer side effects than conventional therapies such as chemotherapy, which targets all fast growing cells and often results in debilitating side effects. Reckamp characterized the side effects see...

Iowa State researchers improving plastics made from corn and soy proteins

... The researchers' plastics aren't quite ready to leave the laboratory. Grewell said he's working on production recipes, processing techniques and ultrasonics applications. Kessler will also work to characterize the plastics' strength plus its thermal and mechanical properties. Working with the two com...

Far more than a meteor killed dinos

...arder to say specifically, since dinosaurs did not leave a lot of fossils behind to tell the tale. "Dinosaur fossils are few and far between," Keller said. "People love the dinosaurs but we can only really study what happened to them by looking at microfossils because these little critters are everywher...

'Fruit fly dating game' provides clues to our reproductive prowess

...arder to say specifically, since dinosaurs did not leave a lot of fossils behind to tell the tale. "Dinosaur fossils are few and far between," Keller said. "People love the dinosaurs but we can only really study what happened to them by looking at microfossils because these little critters are everywher...

New evidence of early horse domestication

...0 years ago there were no saddles or metal bits to leave behind. Equipment like bridles, leads, and hobbles would have been made from thongs of horse hide, and would have rotted away long ago. Likewise horses themselves have not changed much physically as a result of domestication, unlike dogs or cattle. S...

Commercial fishing causes dangerous fluctuations in fish populations

...l devastate the recruits in one season. This would leave the population close to collapse, with very few young fish coming into the group to replace those being caught." Professor Beddington adds that the increased variability has serious implications for the way in which fish stocks are managed: "Typic...

Researchers barcode DNA of Venice museum's vast fungi collection

...elotto, who is doing this work during a sabbatical leave from UC Berkeley. "This shows that museums are actually involved in cutting-edge research. Providing a database of this scope is pretty novel." Museum curator Mizzan said the museum's vast collection of fungi got a kick start when the Venice Socie...

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