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Tag: "disappearance" at biology news

“Nano-scissors?laser shows precise surgical capability

...d.To assure the axons were actually cut, and their disappearance wasn’tcaused by discoloration by the laser, the researchers cut axons theyknew would impair the worms?backward motion. The worms couldn’t movebackwards after surgery. But within 24 hours, most of the severed axonsregrew and the worms recovered backwa...

Small species back-up giant marsupial climate change extinction claim

...arid during the late Pleistocene, which led to the disappearance of woodland and scrubland and expansion of grassland. To verify their results carbon dating was performed on samples. And further work, due to be published later in the year, on other sites in the region confirm the stratification of fossils in the ...

NCI Researchers Confirm the Effectiveness of Immunotherapy Approach to Treating Melanoma

...ent) patients who continued to experience complete disappearance of tumors. This result is particularly significant because these patients had not responded to standard treatments or chemotherapies used in treating patients with melanoma. Thirteen patients relapsed after positive response to therapy and developed...

UNC plant researchers discover proteins interact to form hair-trigger protection against invaders

... to bacteria and other attackers. "By controlling disappearance of resisting proteins, RAR1, HSP90 and SGT1 control whether or not the plant is about to recognize that it is under pathogen attack," Holt said. "So the emerging story is that RAR1 and HSP90 keep resistance proteins ready to perceive pathogen signals...

FDA approves more generic AIDS drugs

... to bacteria and other attackers. "By controlling disappearance of resisting proteins, RAR1, HSP90 and SGT1 control whether or not the plant is about to recognize that it is under pathogen attack," Holt said. "So the emerging story is that RAR1 and HSP90 keep resistance proteins ready to perceive pathogen signals...

Sugar helps control cell division

... cell division is controlled by the appearance and disappearance of certain proteins called cyclins, but experiments have shown that you can knock out any of these and still get perfectly normal cell division," says the study's first author, Chad Slawson, Ph.D., a postdoctoral fellow in biological chemistry in Joh...

Disappearing arctic lakes linked to climate change

...thin and move steadily northward, resulting in the disappearance of more lakes," said Smith. In regions with thin or discontinuous permafrost, surface soils also become drier as the permafrost degrades. "The changing lakes are a consistent, measurable indication of the overall changes to hydrology in the Arctic,...

Seal rookeries could provide a reliable food source for endangered California condors, study finds

... inland no longer had large prey to feed on." The disappearance of terrestrial megafauna caused the first major di... without a food source. Our isotopes show that the disappearance of the marine mammals coincided with the arrival of the large Spanish missions with their cattle, wh...

Learning to love bacteria: Stanford scientist highlights bugs' benefits

...H. pylori, humans are also unknowingly causing the disappearance of other things that have been with us for all of our evolution, and that might play some role in our health. "Could it be this that is responsible for some of the things we see such as the failure of the immune system to act appropriately?" he asked...

Scientists look to the Bahamas as a model for coral reef conservation

...H. pylori, humans are also unknowingly causing the disappearance of other things that have been with us for all of our evolution, and that might play some role in our health. "Could it be this that is responsible for some of the things we see such as the failure of the immune system to act appropriately?" he asked...

Ahead of the game

The disappearance of Neanderthals is frequently attributed to compet... also based on archaeological data, to explain the disappearance of the Neanderthals. This study has important implications for debates surrounding behavioral evolut...

Predicting successful outcomes in living-donor liver transplants

...tcomes. ICG was injected into the patients and its disappearance was monitored by a non-invasive photometric device. This was done for the first 14 days following transplant (including every 12 hours in the first 72 hours) and again at 21 and 28 days following surgery. The results showed that immediately followin...

Colombian frog believed extinct found alive

... overall environmental health of an ecosystem. The disappearance of amphibians could cause numerous consequences, i...n increase in illnesses such as malaria due to the disappearance of amphibians that feed on mosquitoes carrying the disease. An extinction crisis among amphibians in...

Cougar predation key to ecosystem health

The general disappearance of cougars from a portion of Zion National Park in...ng similar ecological ripple effects following the disappearance of wolves in the American West ?may cause land managers to reconsider the importance of predatory sp...

Some butterflies travel farther, reproduce faster

...s go extinct because of parasites, disease and the disappearance of plants that serve as food and shelter. Populations established on an isolated patch may require a good flier to reach a new patch to start a new population. Flight capability varies quite a lot among females, who carry the eggs and establish new...

Lost dogs found more often than lost cats, study suggests

...the study. Collectively, these owners reported the disappearance of 138 cats and 187 dogs. Owners answered a series of questions related to the recovery of their pet, including what kind of methods they used to search for the missing animal. The researchers also asked the owners if the animal was wearing an iden...

Researchers from the University of Navarra analyze new kinds of cancer-fighting antibodies

...linical objectives have been reached (reduction or disappearance of the tumor), which the researchers see as a positive sign to continue with the research. Currently, the researchers study its benefits in cancer survivors through two clinical tests in the third phase. In two years we will test its use as the so...

Bones in motion: Brown scientists to create new 3-D X-ray system

... ligament or an evolutionary biologist tracing the disappearance of digits in pigs would face a difficult task. To see the exact position and movement of bones and the ligaments, tendons and cartilage that surround them, would require cutting into flesh ?not a desirable option. The new system, dubbed CTX, will ...

Whiteflies and plant viruses can help each other to speed up biological invasion

...reaks of the B whitefly have also seen the gradual disappearance of some native whitefly biotypes. Many scientists around the world have been investigating why the B whitefly is so invasive. It is now widely accepted that the B whitefly is most likely to have originated from the Mediterranean/North Africa regio...

Fish extinctions alter critical nutrients in water, study shows

... using computer simulations has teased out how the disappearance of a freshwater fish can affect the availability of certain nutrients that other species rely on. Algae, at the base of the food chain, for example, rely on fish to cycle back into the water such nutrients as nitrogen and phosphorus, which are othe...

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