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Tag: "change" at biology news

Woods Hole Research Center plans controlled burn in Amazon rainforest

...t on forest composition as well as the effect this change has on animal populations and behavior. These experimental fires are a crucial part of simulating what is happening in the Amazon today, as fires set by landholders to control weeds in their pastures or to burn recently felled forest in preparation ...

Overbearing colored light may reveal a second mechanism by which birds interpret magnetic signals

...gnetic field, but they no longer show the seasonal change between spring and autumn and instead head north in both seasons. This behavior did not appear to involve the normal inclination-compass and chemical-compass mechanisms. The new findings show that bright-colored light interferes with magnetoreceptio...

Biased reporting found in cancer prognostic studies

... and annotating data, as well as a needed cultural change within the field of tumor marker research. Citations: # Article: Kyzas PA, Loizou KT, Ioannidis JPA, Selective Reporting Biases in Cancer Prognostic Factor Studies. J Natl Cancer Inst 2005;97:1043?5. # Editorial: McShane LM, Altman DG, Sauerbrei W, ...

Investigating 'brain shrinkage' in alcoholics

...c brain. "The most important permanent structural change is nerve cell loss," said Harper. "Some nerve cell...en have a means of translating knowledge about the change in the condition of the brain from the clinic to the laboratory and back to the clinic." - Both gen...

Fundamental discovery -- Bone fracture

...ecially interested in learning how these molecules change and become depleted with age as well as in certain diseases," said Morse. "A potential benefit from these discoveries is the prospect that we might now learn how to protect bone from these deleterious changes, and perhaps actually reverse some of the...

Lance Armstrong through a physiological lens: hard training boosts muscle power 8%

...ional observations of competitive cyclists." This change in muscle type may account for the apparent ease w... before testing and that a control group showed no change in endurance performance when tested 2 weeks apart with no sprint training intervention." In additio...

Logging changed ecological balance for monkeys, damaged health

...g infectious diseases, anthropogenic environmental change and conservation. The researchers have monitored ... years after the logging ended. "We know land-use change is affecting wildlife species," Gillespie said. "We know that there is a conservation issue. It's be...

Affymetrix and ParAllele Launch Industry's Most Comprehensive Product Line for Targeted Genotyping

...g infectious diseases, anthropogenic environmental change and conservation. The researchers have monitored ... years after the logging ended. "We know land-use change is affecting wildlife species," Gillespie said. "We know that there is a conservation issue. It's be...

President Bush's cut to AIDS prevention in Africa would be devastating

...g infectious diseases, anthropogenic environmental change and conservation. The researchers have monitored ... years after the logging ended. "We know land-use change is affecting wildlife species," Gillespie said. "We know that there is a conservation issue. It's be...

Mayan stingless bee keeping: Going, going, gone?

...eping on the Yucatan ?a result of ongoing cultural change and habitat loss. "In our initial surveys of bee keepers working with native bees in the eighties, we estimated that they maintained more than a thousand active hives. In 1990, we only found around 400 hives, and in 2004, only 90. At this rate, we w...

Seaweed could make junk food healthier

...of these types of foods. "We believe it's hard to change people's habits and that the most practical solution is to improve the food they do eat. With a burger, for example, you would simply remove some of the fat and replace it with the seaweed extract, which is an entirely natural product from a sustain...

Elderly mice yield clues to the process of growing old

...ons in mitochondria slow metabolism. In turn, that change prompts cells to produce fewer of the reactive free radical molecules. The symptoms of aging become pronounced with the loss of some critical cells, notably adult stem cells from some tissues and that are essential for replacing cells that die. "If ...

Nanowires can detect molecular signs of cancer, scientists find

...nto contact with a receptor, it sparks a momentary change in conductance that gives a clear indication of the marker's presence. The detectors differentiate among various cancer markers both through the specific receptors used to snag them and because each binds its receptor for a characteristic length of t...

York scientists warn of dramatic impact of climate change on Africa

...otanist from Montpellier who works on past climate change in West Africa, he immediately drew parallels with... about 2500 years ago." He suggested that climate change would also have large-scale social impacts in Africa in the future. "The social effects of climate ...

Lands surface change on Alaska tundra creating longer, warmer summers in Arctic

...lecting incoming solar radiation. "The vegetation change is pretty dramatic," Epstein said. "The tundra is ...hange, even subtly, there is potential for further change to the global climate." ...

UF researchers kill resistant bugs one bandage at a time

...soldiers in the field who often don't have time to change or shower, and the substance also could be added to hospital gowns and bedding to stop the spread of resistant bugs, said Schultz, who also serves as the company's vice president of clinical research and development. Developed as the ultimate wound ...

Aloe vera coating may prolong freshness, safety of fruits and vegetables

...s were firmer, had less weight loss and less color change than the untreated grapes, measures which correspond to higher freshness, they say. A sensory panel (10 people) evaluated the quality of both the untreated and the gel-treated grapes by consuming some of the grapes. They found that the gel-treated g...

New markers of climate change

A new way to monitor the effects of climate change on rainforests is being investigated at Cambridge ...nd water evaporation have been affected by climate change over the last 50 years. Using types of epiphytes known as bromeliads, Monica Mejia-Chang from Profe...

Hospitalizations because of chicken pox down dramatically since implementation of vaccine

... increase of this magnitude was not anticipated to change the cost-effectiveness dramatically. Second, the national varicella vaccine recommendation prompted states to measure and react to varicella as a reportable vaccine-preventable illness. The costs of such monitoring and of responding to outbreaks of v...

Virginia Tech, Nanjing Institute researchers discover half-billion year-old fossils

... preservation in sandstones," Xiao said. This may change with the new discovery of Ediacara fossils from fine-grained limestone of the Dengying Formation in South China by Xiao and his collaborators. "The Ediacara fossils from China were not deflated before they were incorporated in the rock," said Shen, "...

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