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Tag: "years" at biology news

New World founders small in number

About 14,000 years ago - a few hundred thousand years after our putative modern forebears spread out from Africa - descendants of archaic humans crossed t...

Scientists discover that three overlapping signals in embryo help get the backbone right

... the back, or dorsal, structures to form. Thirteen years ago, Richard Harland, professor and chair of the D...or back development. "It is really in the last 20 years that it has been possible to tease these apart cleanly and develop assays that are good enough to fi...

Marine sponge yields nanoscale secrets

... of semi-conductors on these chip surfaces. A few years ago, Morse and his research group began investigating how nature builds materials from silicon. Silicon is particularly interesting to Morse, because it is considered by many to be the most important element on the planet technologically. Silicon chi...

Genetic therapy reverses nervous system damage in animal model of inherited human disease

...s note that any clinical trials in humans might be years in the future. ### Video comparing a cat with AMD to one that had been given gene therapy is available at www.mrw.interscience.wiley.com/suppmat/0364-5134/suppmat/2005/57/v57.3.355.html. ...

One gene links newborn neurons with those that die in diseases such as Alzheimer's

...or. It was in this brain region that, more than 20 years ago, Nottebohm discovered new neurons being born in adult birds, overturning the conventional wisdom that all neurons in vertebrates are created by birth or soon after. In the new study, the researchers looked at cells in the high vocal center regio...

Oceans more vulnerable to agricultural runoff than previously thought, study finds

...002. The results were dramatic. "I looked at five years of satellite data," said Beman, lead author of the study. "There were roughly four irrigation events per year, and right after each one, you'd see a bloom appear within a matter of days." Each bloom was enormous, he said, covering from 19 to 223 squ...

UCSD research reveals mechanism involved with type of fatal epilepsy

...ning seizures, early dementia, and death within 10 years of onset. Medications can ease the severity of initial symptoms, but there is no long-term treatment or cure for the disease. A puzzling aspect of the disease is the accumulation of starch-/glycogen-like granules in most tissues of Lafora disease pa...

To sea or not to sea: When it comes to salmon sex, size sometimes doesn't matter

...as covered by thick glaciers some 10,000 to 15,000 years ago, so most current populations were founded by s...ms and rivers ?ones where conditions are good some years and bad in others -?may be genetically inclined to produce more offspring that are likely to stray. ...

Taking the piste out of Alpine vegetation

... pistes that had been machine graded as long as 30 years ago and re-sown with plant seed had still not recovered. "Machine grading constitutes the most drastic vegetation disturbance on ski pistes. It should be avoided wherever possible, as it causes lasting damage that cannot be overcome by revegetation m...

Oldest fossil human protein ever sequenced

...Shanidar Cave, Iraq dating to approximately 75,000 years old. This is the oldest fossil human protein ever sequenced. The research will be published the week of March 7-11 in the online early edition of Proceedings of the National Academy of Sciences (PNAS). "This research opens up the possibility of get...

Study uncovers bacteria's worst enemy

..., "is exciting because even though we've known for years that bacterial bioremediation can be a preferred method for cleaning up actinide contamination, we've never really known whether or not radioactivity or chemical toxicity will stifle the process. Our study found that actinides are chemically toxic to...

Secret of smallpox's success may lead to bioterror cure

...never have to be used, Jacobs has a feeling now of years of research coming to fruition. "This is the result of work that we have been doing for 15 years now and I think we are really very close to producing some really important findings, especially now...

Measles Deaths Worldwide Drop By Nearly 40% Over Five Years

... to ensure that every child from nine months to 14 years of age receives a "second opportunity" for measles... Malnourished and un-immunized children under five years of age, especially infants, are at high risk of contracting measles and are more vulnerable to death...

Cellular Defects in Premature Aging Disease are Reversible

...before they reach their late teens. Less than two years ago, NIH-led researchers discovered that the genetic basis for HGPS is a single mutation in the gene encoding lamin A. Lamin A is a critical structural protein that acts as the scaffolding which holds a cell's nucleus together. Lamin A is defective i...

Supercomputers to focus brains on AIDS dilemma

...ountries. In the late 1980s and early 1990s, after years of effort AIDS researchers succeeded in developing a class of drugs that proved to be highly effective against AIDS. By blocking the activity of the viral enzyme HIV protease, these protease inhibitors brought greatly extended life-spans to patients ...

Man-made wetland's effectiveness similar to natural marsh

...ers who studied a man-made wetland in Ohio for two years concluded that the created wetland filtered and cl...g lots and other surfaces, and hold on to them for years to come. But the jury is still out on how long a wetland can remain a sink for certain nutrients, M...

The biggest family tree ever

...ndered where your family's ancestors roamed 60,000 years ago? Now you can find out by participating in the ...gins and migratory history of mankind thousands of years back in time by analyzing genetic samples from at least 200,000 people all over the world. National...

Gladstone investigators discover how resting T cells avoid HIV infection

...fit HIV-infected patients around the world." Four years ago, HIV biologists were galvanized by the discovery of A3G as a potent anti-HIV factor. Initially, scientists thought that A3G had to squeeze into new HIV viral particles in order to produce its antiviral effects. The new Nature study indicates that...

Oldest cranial, dental and postcranial fossils of early modern European humans confirmed

...n Moravia, Czech Republic, excavated more than 100 years ago, has been proven for the first time, through m...s study. "The Mladec samples date to around 31,000 years ago," reports Eva Maria Wild from the VERA (Vienna Environmental Research Accelerator) Laboratory at...

Agilent Technologies new genome analysis technology set to accelerate Australia fight against mesothelioma

.... Rates of the disease have tripled in the past 20 years and are expected to peak about 2010. Diagnosis of this type of cancer is difficult, and patients are often not identified until the condition is quite advanced. Agilent's new microarray techniques in comparative genomic hybridization (CGH) will allo...

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