Crows fed on prion-infected brains from mice can transmit these infectious agents in their feces and may play a role in the geographic spread of diseases caused by prions, such as chronic wasting disease or scrapie. The new research published Oct. 17 in the open access journal PLOS ONE by Kurt VerCauteren from the US Department of Agriculture (USDA) and other colleagues, shows that prions can pass through crows' digestive systems without being destroyed, and may be excreted intact after ingestion by the birds. According to the authors, their results demonstrate a potential ...

European astronomers have discovered a planet with about the mass of the Earth orbiting a star in the Alpha Centauri system — the nearest to Earth. It is also the lightest exoplanet ever discovered around a star like the Sun. The planet was detected using the HARPS instrument on the 3.6-metre telescope at ESO's La Silla Observatory in Chile. The results will appear online in the journal Nature on 17 October 2012. Alpha Centauri is one of the brightest stars in the southern skies and is the nearest stellar system to our Solar System -- only 4.3 light-years away. It is ...

Women whose first pregnancy is ectopic are likely to have fewer children in the following 20-30 years than women whose first pregnancy ends in a delivery, miscarriage or abortion, according to results from a study of nearly 3,000 women in Denmark. In addition, these women have a five-fold increased risk of a subsequent ectopic pregnancy. The first study to look at long-term reproductive outcomes in women whose first pregnancy was ectopic is published online today (Thursday) in Europe's leading reproductive medicine journal Human Reproduction [1]. Ectopic pregnancies ...

PHILADELPHIA - Changes in the ability to smell and taste can be caused by a simple cold or upper respiratory tract infection, but they may also be among the first signs of neurodegenerative disorders such as Alzheimer's disease and Parkinson's disease. Now, new research from the Perelman School of Medicine at the University of Pennsylvania has revealed an association between an impaired sense of smell and myasthenia gravis (MG), a chronic autoimmune neuromuscular disease characterized by fluctuating fatigue and muscle weakness. The findings are published in the latest edition ...

Men have borne the brunt of worsening mental health across the population of England since the start of the economic downturn in 2008, reveals research published in the online journal BMJ Open. But unemployment and a falling household income don't seem to be the culprits, prompting the authors to suggest that it is the threat of losing their jobs that has affected men's mental health. They base their findings on data taken from the national representative annual Health Survey for England for adults aged 25 to 64, between 1991 and 2010. Response rates during this ...

Bariatric surgery—restrictive gastric banding and other types of gastric bypass—can radically reduce risk factors for heart disease and stroke, and within a short period of time, indicates an analysis of the available evidence, published online in Heart. The impact is much greater and faster than drug treatments for weight management or diabetes, say the authors, and in some cases, could be life-saving. Being obese or overweight kills more than 2.6 million people every year. And the evidence shows that excess body fat produces harmful chemicals and skews gut hormones ...

BATON ROUGE – LSU's John Fleeger, professor emeritus in LSU's Department of Biological Sciences, is part of a multi-disciplinary national research group that recently discovered the impact of nutrient enrichment on salt marsh ecosystems is marsh loss and that such loss is seen much faster than previously thought. Globally between a quarter and half of the area of the world's tidal marshes has already been lost, and although multiple factors – sea-level rise, development, loss of sediment supply – are known to contribute to marsh loss, in some locations the causes have remained ...

Fresh examinations of lunar rocks gathered by Apollo mission astronauts have yielded new insights about the moon's chemical makeup as well as clues about the giant impacts that may have shaped the early beginnings of Earth and the moon. Geochemist James Day of Scripps Institution of Oceanography at UC San Diego and colleagues Randal Paniello and Frédéric Moynier at Washington University in St. Louis used advanced technological instrumentation to probe the chemical signatures of moon rocks obtained during four lunar missions and meteorites collected from the Antarctic. ...

An international consortium of scientists has published a high resolution draft of the barley genome. The research, published in the journal Nature, will help to produce new and better barley varieties that are vital for the beer and whisky industries. The UK team behind the research was led by Professor Robbie Waugh of Scotland's James Hutton Institute who worked with researchers at The Genome Analysis Centre, Norwich. Barley is the second most important crop in UK agriculture and malting barley underpins brewing and pub industries worth some £20 billion to the UK ...

As the climate changes, conservationists are divided over the most effective way to preserve animal and plant diversity because they cannot simply preserve the status quo. Ensuring species can shift to track the climate to which they are suited is a complex problem, especially when there are competing demands on land use. A simple prediction is that more habitat would help species to shift, but it is not obvious what the best spatial locations for habitat would be. A new study led by scientists at the University of York says that well placed habitat "stepping stones" would ...

Stunning images, including video footage, from a CT scan of amber have revealed the first evidence of any creature using an adult mayfly for transport. Researchers at the University of Manchester say this 16 million-year-old hitchhiker most likely demonstrates activity that is taking place today but has never previously been recorded. Entombed in amber the tiny springtail can be seen resting in a v-shaped depression at the base of one of the mayfly's wings. It appears to have secured itself for transport using its prehensile antennae. Dr David Penney and colleagues ...

New Rochelle, NY, October 17, 2012—Among adults who use social media such as Facebook, YouTube, Twitter, and blogs for political purposes, 42% are under the age of 30. A case study of the controversial Budget Repair Bill in Wisconsin explored whether young adults who use social media are more likely to engage in offline protests, and the results are published in an article in Cyberpsychology, Behavior, and Social Networking, a peer-reviewed journal from Mary Ann Liebert, Inc., publishers. The article is available free online on the Cyberpsychology, Behavior, and Social ...

A potential new treatment for traumatic brain injury (TBI), which affects thousands of soldiers, auto accident victims, athletes and others each year, has shown promise in laboratory research, scientists are reporting. TBI can occur in individuals who experience a violent blow to the head that makes the brain collide with the inside of the skull, a gunshot injury or exposure to a nearby explosion. The report on TBI, which currently cannot be treated and may result in permanent brain damage or death, appears in the journal ACS Nano. Thomas Kent, James Tour and colleagues ...

Scientists are reporting development of a new malaria drug that, in laboratory tests, has been twice as effective as the best current medicine against this global scourge and may fight off the disease with one dose, instead of the multiple doses that people often fail to take. A report on the drug appears in ACS' Journal of Medicinal Chemistry. Gary Posner and colleagues explain that malaria continues to kill almost 1 million people annually. The best existing treatment is so-called artemisinin combination therapy (ACT). It requires patients to take pills every day for ...

Leaves of the plant that yields carob — the substitute for chocolate that some consider healthier than chocolate — are a rich source of antibacterial substances ideal for fighting the microbe responsible for listeriosis, a serious form of food poisoning, according to a report in ACS' Journal of Agricultural and Food Chemistry. Nadhem Aissani and colleagues explain that the increase in antibiotic-resistant bacteria has fostered a search for new natural substances to preserve food and control disease-causing microbes. They cite a need for new substances to combat Listeria ...

The technology that opened a wealth of new natural gas resources in the U.S. is producing millions of gallons of dirty water — enough from one typical gas well to cover a football field to a depth of 9-15 feet. Cleaning up that byproduct of "fracking" is the topic of the cover story of the current issue of Chemical & Engineering News. C&EN is the weekly newsmagazine of the American Chemical Society, the world's largest scientific society. Melody M. Bomgardner, C&EN senior business editor, explains that hydraulic fracturing, or fracking, uses a mixture of water and chemicals ...

Philadelphia, PA – October 17, 2012—Studying the dynamics of the ocean system can greatly improve our understanding of key processes of ocean circulations, which have implications for future climate. Can applying mathematics to the research help? Dr. Emily Shuckburgh of the British Antarctic Survey, speaking at the 2012 SIAM Annual Meeting, thinks the answer is an emphatic "yes." Dr. Shuckburgh described mathematical ideas from dynamical systems used by her group, along with numerical modeling and experimental observations, to analyze circulation in the Southern Ocean. ...

WOODS HOLE, Mass.—Salt marshes have been disintegrating and dying over the past two decades along the U.S. Eastern seaboard and other highly developed coastlines, without anyone fully understanding why. This week in the journal Nature, MBL Ecosystems Center scientist Linda Deegan and colleagues report that nutrients—such as nitrogen and phosphorus from septic and sewer systems and lawn fertilizers—can cause salt-marsh loss. "Salt marshes are a critical interface between the land and sea," Deegan says. "They provide habitat for fish, birds, and shellfish; protect coastal ...

MAYWOOD, Ill. – Breech births increase the risk of complications for the mother and baby when the amniotic sac ruptures early. These findings were presented today by a researcher from Loyola University Health System at the 79th Annual Meeting of the Central Association of Obstetricians and Gynecologists in Chicago. Preterm, premature rupture of the amniotic sac contributes to one-third of all preterm births. A rupture is considered premature when it occurs before the onset of labor prior to 37 weeks' gestation. When the amniotic sac breaks prematurely, it can lead to ...

Irvine, Calif., Oct. 17, 2012 – UC Irvine and Brown University researchers have created a new fruit fly model of inherited epilepsy that's providing insights into the mechanisms underlying temperature-dependent seizures while establishing a platform from which to develop therapies for these disorders. In the Oct. 10 issue of The Journal of Neuroscience, Diane O'Dowd of UCI, Robert Reenan of Brown and colleagues report their method for placing a gene mutation that causes human fever-induced seizures into drosophila fruit flies. As a result, the mutant flies experience ...

WASHINGTON, October 17, 2012--In a major advance that will unlock the benefits of the mapping of the barley genome--one of the world's most important cereal crops--work conducted and supported by the U.S. Department of Agriculture (USDA) in collaboration with researchers around the world has resulted in the most advanced sequencing of the barley genome to date, as reported today in the journal Nature. The advance will give researchers the tools to produce higher yields, improve pest and disease resistance, and enhance nutritional value of barley. Past genomic research supported ...

When facing a difficult choice, many of us turn to that old standby: the pro-con list. A University of Washington project takes election pro-con lists to the next level, moving them online and allowing voters to work together to draft points – brief arguments for or against – and refine their positions. Now in its third year, the Living Voters Guide, presented in partnership with Seattle's CityClub, just won a regional award and has been updated for the 2012 election. This year the guide has expanded to include a California edition, and the Washington guide will include ...

In Europe there are many concerns about adverse environmental effects of GM crops, and the opinions on the outcomes of environmental risk assessments (ERA) differ largely. GM crop safety testing and introduction studies among the regulatory system are insufficiently developed. Therefore the proposed framework aims at improving the regulatory system. Specific elements of the network are a) methodologies for both indicator and field site selection for GM crop ERA and PMEM, b) an EU-wide typology of agro-environments, c) a pan-European field testing network using GM crops, ...

MADISON – In 1986, when Voyager swept past Uranus, the probe's portraits of the planet were "notoriously bland," disappointing scientists, yielding few new details of the planet and its atmosphere, and giving it a reputation as a bore of the solar system. Now, however, thanks to a new technique applied at the Keck Observatory, Uranus is coming into sharp focus through high-resolution infrared images, revealing in incredible detail the bizarre weather of the seventh planet from the sun. The images were released in Reno, Nev. today (Oct. 17, 2012) at a meeting of the ...

MINNEAPOLIS / ST. PAUL (10/17/2012) —An international team of researchers, including a University of Minnesota scientist, has developed an integrated physical, genetic and functional sequence assembly of the barley genome, one of the world's most important and genetically complex cereal crops. Results are published in today's issue of Nature. The advance will give researchers the tools to produce higher yields, improve pest and disease resistance, and enhance the nutritional value of barley. Importantly, it also will "accelerate breeding improvements to help barley ...