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Tag: "begin" at biology news

Fast test for low blood flow in dogs detects early heart trouble

... of arterial disease. He notes that blood vessels begin to narrow long before mild chest pain and other symptoms occur, leading to reduced blood flow that gradually starves the heart of needed oxygen and nutrients. According to Lardo, blood flow in these tiny vessels can be readily detected by high-re...

End of deforestation in view? Experts advance new way to size up global forest resources

...use could stop the styling of a Skinhead Earth and begin a great restoration of the landscape by 2050, expanding the global forest by 10 percent ?about 300 million hectares, the area of India." "Without depopulation or impoverishment, increasing numbers of countries are experiencing transitions in fores...

Some butterflies travel farther, reproduce faster

...rate, Fescemyer said. Each year, new populations begin in some patches while others 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...

Shrinking ponds signal warmer, dryer Alaska

...top speculating about possible water body loss and begin to address the implications of this loss." Using black and white aerial photographs from the 1950s, color infrared aerial photographs from 1978-1982, and digital images from the Landsat satellite from 1999-2002, Riordan outlined each pond by hand. ...

Successful lung cancer surgery not enough to break nicotine dependence in many smokers

...from cigarettes, and that this intervention should begin as soon as possible after treatment," Walker said. No such programs are currently offered to lung cancer surgery patients, he added. At least seven studies of non-small cell lung cancer patients have shown that many of these patients continue smok...

U of S Vaccine and Infectious Disease Organization team discovers key step in flu virus replication

...ing reverse genetics technology, where researchers begin with a gene and figure out its function. These ... avian influenza develop, we have the resources to begin studying the disease fairly quickly." ...

Nanotech tools yield DNA transcription breakthrough

...interactions with the initial binding site, and to begin to move down the gene. "Our findings were made possible by newly developed, single-molecule methods," said Ebright, a Howard Hughes Medical Institute investigator and professor of chemistry and chemical biology at Rutgers, The State University of...

Pressured by predators, lizards see rapid shift in natural selection

... scientists projected that natural selection would begin to favor shorter limbs, which are better suited to navigating narrow branches and twigs. Their hypothesis was borne out. Six months after the introduction of the predator, Losos found that the Anolis population had dropped by half or more on the i...

New dyslexia theory blames 'noise'

...ur categories are fuzzier than they ought to be to begin with," she said. "In terms of treatment, the r...w. As external noise goes up, the same subjects begin to score poorly on visual pattern tests. The deficit persists even when the task requires only sl...

Slow brain waves play key role in coordinating complex activity

...ormation," said Knight. "When you stop reading and begin to type, theta rhythms oscillate in motor structures, allowing you to plan and execute your motor response by way of high gamma. Simple, but effective." The findings are reported in the Sept. 15 issue of Science. The researchers found that when peo...

Public Library of Science to launch new, open access journal on neglected tropical diseases

...from the Bill & Melinda Gates Foundation, will begin accepting submissions in 2007. "PLoS Neglected Tropical Diseases will promote science, policy, and advocacy for diseases of the poor, and give a voice to the community of physicians and scientists working to control these diseases," said Peter Hote...

Mass vaccination unnecessary in the event of a large bioterrorist US smallpox attack

... constructing these models, Longini and colleagues begin with assumptions about how people interact and how the virus spreads. They also introduce and evaluate the effectiveness of various intervention strategies. The study represents the first attempt to integrate what science knows about the natural hi...

Does natural selection drive the evolution of cancer?

..., that the fibroblasts in a tumor microenvironment begin to acquire mutations of their own. "They're co-evolving, and it becomes a dynamic, runaway process," Maley says. ...

Researchers discover key mechanism by which lethal viruses Ebola and Marburg cause disease

... Journal. Using this information, researchers can begin to develop new drugs to stop these devastating diseases. Filoviruses, named for their threadlike appearance in electron microscopy (filo= thread in Latin), are associated with outbreaks of fatal hemorrhagic fever in sub-Saharan Africa. Viral hemorrh...

HIV exploits competition among T-cells

...s 4-5 days for T cells produced in a lymph node to begin to leave it, the possibility exists to set up simultaneous, independent competition against each of the multiple strains that will evolve by injecting each strain simultaneously so that they drain to different lymph nodes. In this case, no single T c...

Two-faced protein can stop metastasis or promote it, researchers say

...hem apart and promoting their movement when tumors begin to spread to other parts of the body, researchers ...st during the progression of cancer, p120 catenins begin binding to mesenchymal cadherins. And when that happens, the researchers found that p120 unexpectedl...

Gene therapy for hereditary lung disease advances

...ients this gene transfer vector and then to try to begin to see if we could get the dose into a range where we would begin to replace the missing protein in the blood," said Terence Flotte, M.D., a pediatrician, geneticist ...

Changing length of days reverses how estrogen affects aggressiveness in mice

...eceptor in summer-like long days ?which could help begin to explain why estrogen could make mice more aggressive in winter, and less aggressive in summer. To investigate whether this theory was true, Nelson and Trainor conducted an experiment in which they injected mice with an estrogen-like drug which ...

Getting to the heart of the heart

...cent of the cells in the dish) that were poised to begin developing along a cardiac pathway. The presence of these cardiac progenitors was indicated by a green fluorescent protein, which lit up when a gene called Nkx2.5 was activated. Orkin and Wu then showed that these cells further differentiated into bo...

Renewed dolphin slaughter prompts new campaign

As the annual dolphin drive hunts begin in the Japanese villages of Taiji and Futo, a consortium of scientists and zoo and aquarium professionals has launched a campaign to end the practices through public awareness and by appealing to the government of Japan to put an end to the hunts. T...

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