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Tag: "most" at biology news

Fish extinctions alter critical nutrients in water, study shows

...the computer simulations found. "The loss of the most heavily fished species led to the fastest declines...ogen are not always the same ones that recycle the most phosphorus. These differences would make it difficult for conservationists to prioritize species to ...

It's never too late to get it back! Aging interrupted

...ell damage and the emergence of cancer cells. The most important effects of low calorie diets and longevity therapeutics given late in life may not be to prevent this damage, but instead to stimulate the body to eliminate damaged cells that may become cancerous, and to stimulate repair in damaged cells l...

Leeches ferry infection among newts

...bitten body parts, suggested that leeches were the most likely vehicle transferring the disease. Further ...ncreases in the infection, since these leeches are most abundant in wetlands with lots of aquatic vegetation. The Penn State researchers say fertilizer-...

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

.... It is now widely accepted that the B whitefly is most likely to have originated from the Mediterranean/North Africa region, and its recent widespread invasion has been assisted by the worldwide flower trade. The question remains how this pest can increase so rapidly and displace native biotypes of white...

In young mice, gregariousness seems to reside in the genes

...o simulate the nocturnal environment when mice are most active, the sociability of test mice was assessed when they were reunited with their former cage mates. At the same time, the researchers tuned in to the ultrasonic chattering that mice use to communicate with each other. For the more socially pre...

Rare cell prevents rampant brain activity

... discovered a mechanism that might explain how the most common type of neuron in the cerebral cortex ?the pyramid cell ?is prevented from becoming over-activated. Their results show that a rarer cell type that links collections of pyramid cells ?called a Martinotti cell ?acts as a kind of safety device. W...

Scientists see DNA get 'sunburned' for the first time

...sustain damage in real time. They observed the most common chemical reaction among a family of reactio...an short-lived ones. But this study shows that the most common UV damage is caused by a very short-lived excited state. "The speed of this reaction has i...

Flies don't buzz about aimlessly!

...ecause it suggests a unified theory for one of the most critical behaviour animals exhibit ?foraging for food." The next step will be toward integrating these results with the neurobiology of fly flight to better understand how these tiny animals are so successful at crashing our dinner parties. The re...

Studies force new view on biology of flavonoids

...d by the body, usually less than five percent, and most of what does get absorbed into the blood stream is...aused by the flavonoids themselves, Frei said, but most likely is the result of increased uric acid levels. But just because flavonoids have been found t...

Researchers develop marker that identifies energy-producing centers in nerve cells

...in mice could unravel the mysteries of some of the most debilitating neurodegenerative diseases. The study's senior author, Tibor Kristian, Ph.D., an assistant professor in the Department of Anesthesiology at the University of Maryland School of Medicine, says there are animal models for several of these ...

Rapid response was crucial to containing the 1918 flu pandemic

...a result, peak mortality rates were higher. In the most extreme disparity, the peak mortality rate in St. ...ns. In San Francisco, which they found to have the most effective measures, they estimate that deaths would have been 25 percent higher had city officials n...

Study examines genetic risk factors for Alzheimer's disease

...evidence of contributing to Alzheimer?disease, the most interesting gene being ‘GALP?which could affect the development of tangles within brain cells, a hallmark of Alzheimer’s disease. Professor Julie Williams, School of Medicine, who leads this project with Professor Micheal Owen said: “Whilst these ...

Genetic fingerprints identify brain tumors' origins

...cause of cancer-related death in children, and the most common childhood brain tumor is the pilocytic astr...the new study, Gutmann led six laboratories in the most detailed genetic analysis of PAs to date. "We were hoping to identify genes that contribute to th...

Super-fermenting fungus genome sequenced

...tion of Nature Biotechnology. P. stipitis is the most proficient microbial fermenter in nature of the five-carbon “wood sugar?xylose—abundant in hardwoods and agricultural leftovers, which represent a motherlode of bioenergy fodder. “Increasing the capacity of P. stipitis to ferment xylose and using ...

Scientists identify pancreatic cancer stem cells

...ut cells that expressed all three markers were the most potent, producing tumors in six of 12 mice tested. If more cells are used, "we can get tumors to grow 100 percent of the time," Simeone said. "These cells are highly tumorigenic, which reflects the biology of this cancer." Additionally, the tumors...

Stanford-led study closes in on genes that may predispose some people to severe depression

... The second study was a more detailed look at the most suspicious of these regions, located on chromosome 15. Levinson said the team studied six DNA markers in this region in the first study, and an additional 88 in the second. "We found highly significant evidence for linkage to depression in this ...

BMI not accurate indicator of body fat

...whom were athletes and some not ?and found that in most cases the student's BMI did not accurately reflect his or her percentage of body fat. The research is published in the March issue of Medicine and Science in Sports and Medicine, the official journal of the American College of Sports Medicine. ...

Transfusion expert urges wider use of filtered blood

...at might needlessly be harmful to them. The single most effective and overdue safety measure the FDA could take at this time is to mandate leukoreduction of all transfusions through its regulatory power." Blumberg's group reviewed approximately 520 abstracts and nine published randomized clinical trial...

30+ AIDS vaccine clinical trials in 24 countries, research occurring on every continent

...h data expected later this year. Two of the most advanced trials underway in 2007 are from Sanofi-Pasteur and Merck & Co., Inc. Data from Merck's ongoing Phase IIb test-of-concept trial with its adeno-5 vector vaccine candidate is expected in 2008 or 2009 and will provide preliminary informatio...

Scientists genetically engineer tomatoes with enhanced folate content

...e a very serious problem." Folate is one of the most vital nutrients for the human body's growth and development, which is why folate-rich diets are typically suggested for women planning a pregnancy or who are pregnant. Without it, cell division would not be possible because the nutrient plays an esse...

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