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Tag: "occasionally" at biology news

Avian influenza survivors' antibodies effective at neutralising H5N1 strain

... death in millions of poultry across the globe and occasionally has been transmitted to humans, often fatally. By mid-May 2007, according to the World Health Organization, there had been 306 known cases in humans, 185 of them fatal. Now, doctors based at the Hospital for Tropical Diseases in Ho Chi Minh City,...

Genetic roots of bipolar disorder revealed by first genome-wide study of illness

... NIMH Director Thomas R. Insel, MD. Most people occasionally have mood swings, but the shifts that occur in bipolar disorder, and the changes in behavior and energy level that accompany them, are sometimes disabling. Lithium and the other mood-stabilizing medications used to treat the condition help many pati...

Scientists see DNA get 'sunburned' for the first time

...time. The energy often decays away harmlessly, but occasionally it triggers a chemical reaction that alters the DNA's molecular structure. Previously, scientists believed that the longer a DNA molecule was excited by UV energy, the greater the chance that it would sustain damage. So long-lived excited states w...

Tracking sperm whales and jumbo squid

...f large body size," the authors wrote. "Whales did occasionally dive beyond 500 meters, especially during daytime when the squid were deep, and we assume these also represent foraging dives." Night and day During the day, whales and squid spent about 75 percent of the time at depths ranging from 600 to 1,...

Studies yield insight into the numerical brain

...lly reacting to numerical quantity, the researcher occasionally injected a "deviant stimulus" into the second presentation of a quantity as the brain was adapting to it. This deviant stimulus consisted of a different number that was either close to, or far from, the number being presented. The researchers found t...

No sex for 40 million years? No problem

...microscopic aquatic animals that live in watery or occasionally wet habitats including ponds, rivers, soils, and on mosses and lichens. These tiny asexual creatures multiply by producing eggs that are genetic clones of the mother ?there are no males. Fossil records and molecular data show that bdelloid rotifers h...

Study finds mercury prevalent in many western fish

... The researchers say the risk for humans who may occasionally eat fish from the streams is fairly low and they compare the mercury levels in most of the larger piscivorous fish they analyzed to that found in cans of store-bought tuna. Consumption of those products in moderation is considered safe, though infant...

How fish mend a broken heart

...or regeneration is an ancestral condition that has occasionally been lost in the course of vertebrate evolution." Poss said. "Thus, most biologists suspect that the machinery to optimize regeneration from progenitor cells is present, but lies dormant, in mammals." In an earlier study, Poss and his colleagues fo...

Evolution of influenza A virus

...rculate across the state within any one season and occasionally exchange genes through reassortment. These results indicate that adaptive evolution occurs only sporadically in influenza virus, and that influenza virus diversity and evolution is strongly affected by chance events, such as reassortment between ...

British cattle give TB to badgers, finds UC Davis expert

... to fight cattle tuberculosis, a disease which can occasionally be transmitted to people. Farming ministers are currently deciding whether culling should be continued, following a public consultation on the issue which provoked over 47,000 responses. Woodroffe's report, published Oct. 2 in the Proceedings of the...

Powerful genome ID method extended to humans

...their DNA in common. But, Green said, "individuals occasionally have big differences in their chromosome structure. You sometimes find regions where there are larger changes." Such changes could include wholesale deletions of chunks of the genome or additions of extra copies. Cancer genomes, in particular, mut...

Seals protect brain, conserve oxygen by turning off shivering response on icy dives

...much shorter than their maximum capacity, and only occasionally perform very long dives. By limiting dive duration...e at sea underwater, he said. Seals in the wild occasionally dive for so long that they use nearly all their oxygen, but they can recover with these special adap...

A new target for painkillers

...orms, unlike relatives that eat fish or snails and occasionally deliver a fatal sting to a human fisherman. -- RgIA is from the species Conus regius, which measures 1.6 to 2.8 inches in length and lives from Georgia southward along Central America to Brazil's central coast. -- Vc1.1 is from the species Conu...

Walking not enough for significant exercise benefits

...y marked health benefits compared to programs that occasionally elevate the intensity," said Dr. Vicki Harber, lead author on the Health First study, which was presented recently at the American College of Sports Medicine annual conference. Dr. Harber and her colleagues, Dr. Wendy Rodgers, Dr. Gordon Bell and Dr...

Dinosaurs -- stones did not help with digestion

...er cent of the body mass of the birds. 'Whereas occasionally stones were found together with sauropod skeletons, we don't think they are remains of a gastric mill such as occurs in birds,' Dr. Sander comments. In that kind of gastric mill the stones would have been very worn and would not have a smoothly polis...

Better sludge through metagenomics

...research into why some wastewater treatment plants occasionally fail. These failures often result in serious pollution of lakes, rivers, and estuaries." When things go wrong, the environment can be inundated with untreated phosphorous, carbon, and nitrogen--the detritus of human activities--necessitating costly...

UCI scientists find chlorine may contribute to ozone formation

...ally measured five parts per trillion or less, but occasionally reached as high as 15 parts per trillion. Observation of daytime chlorine is surprising because chlorine molecules break apart just minutes after entering the atmosphere and being exposed to sunlight. With these measurements, scientists estimate tha...

Wisconsin scientists grow two new stem cell lines in animal cell-free culture

...re related to the medium at this point, as we have occasionally observed similar changes in previous culture conditions," he says. "However, these changes do indicate that that further work is needed to understand chromosome stability of stem cells during long-term culture." In early 2005, WiCell scientists re...

Outsmarting the smartie bug

...person by sneezing and other aerosols. However, it occasionally passes from the airways to invade other tissues. This can lead to any one of a range of diseases including meningitis and infections of the sinuses, ear, lungs and blood. Why it switches to become invasive is not known. The team sequenced all genes...

New test to detect rare proteins in blood

...ite this conventional therapy the cancer still can occasionally reoccur," says Greene. Detection of very early recurrence is important and Greene feels the power of this technology will facilitate recognizing early phases of tumor emergence. Rational targeted therapy has shown in animal models ?over 10 years ago...

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