Standing and walking for longer stretches improves insulin sensitivity and blood lipid levels more than an hour of intense exercise each day does, but only if the calories spent in both forms of exercise are similar. The findings are published February 13 in the open access journal PLOS ONE by Hans Savelberg and colleagues from Maastricht University, Netherlands. The researchers recruited eighteen normal-weight 19 to 24-year-old participants for their study and asked them to follow three regimes. In the first, participants were instructed to sit for 14 hours each day ...

A new owl is the first endemic bird species discovered on the island of Lombok, Indonesia, according to research published February 13 in the open access journal PLOS ONE by an international team headed by George Sangster of the Swedish Museum of Natural History and colleagues from other institutions. The new species has long been confused with a more widespread Indonesian owl species because of its similar plumage. However, in September 2003, two members of the team independently discovered that the vocalizations of the owls on Lombok were unique and different from ...

A team of political scientists and neuroscientists has shown that liberals and conservatives use different parts of the brain when they make risky decisions, and these regions can be used to predict which political party a person prefers. The new study suggests that while genetics or parental influence may play a significant role, being a Republican or Democrat changes how the brain functions. Dr. Darren Schreiber, a researcher in neuropolitics at the University of Exeter, has been working in collaboration with colleagues at the University of California, San Diego on ...

Soldiers preoccupied with threat at the time of enlistment or with avoiding it just before deployment were more likely to develop post-traumatic stress disorder (PTSD), in a study of Israeli infantrymen. Such pre-deployment threat vigilance and avoidance, interacting with combat experience and an emotion-related gene, accounted for more than a third of PTSD symptoms that emerged later, say National Institutes of Health scientists, who conducted the study in collaboration with American and Israeli colleagues. "Since biased attention predicted future risk for PTSD, computerized ...

The richer the assortment of amphibian species living in a pond, the more protection that community of frogs, toads and salamanders has against a parasitic infection that can cause severe deformities, including the growth of extra legs, according to a new study by the University of Colorado Boulder. The findings, published Feb. 14 in the journal Nature, support the idea that greater biodiversity in larger-scale ecosystems, such as forests or grasslands, may also provide greater protection against diseases, including those that attack humans. For example, a larger number ...

CHESTNUT HILL, MA (Feb. 14, 2013) – Chemists at Boston College have designed a new class of catalysts triggered by the charge of a single proton, the team reports in the most recent edition of the journal Nature. The simple organic molecules offer a sustainable and highly efficient platform for chemical reactions that produce sets of molecules crucial to advances in medicine and the life sciences. Unearthing a reliable, truly general, efficient synthesis of single mirror-image isomers has proven elusive. Previous methods suffer from a combination of extreme temperatures, ...

A significant proportion of HIV positive patients may not be disclosing their infection to NHS staff, when turning up for treatment at sexual health clinics, suggests preliminary research published online in the journal Sexually Transmitted Infections. If the findings reflect a national trend, this could have implications for the true prevalence of undiagnosed HIV infection in the population, which is based on the numbers of "undiagnosed" patients at sexual health clinics, say the authors. Currently, it is estimated that around one in four people in the UK who is HIV ...

Over a span of nearly 20 years, California's tobacco control program cost $2.4 billion and reduced health care costs by $134 billion, according to a new study by UC San Francisco. Additionally, the study -- covering the beginning of the program in 1989 to 2008 -- found that the state program helped lead to some 6.8 billion fewer packs of cigarettes being sold that would have been worth $28.5 billion in sales to cigarette companies. The study was designed to calculate the fiscal impact of California's large public health program on smoking prevalence and cigarette consumption. ...

We make choices about pretty much everything, all the time – "Should I go for a walk or grab a coffee?"; "Shall I look at who just came in or continue to watch TV?" – and to do so we need something common as a basis to make the choice. Dr John Fennell and Dr Roland Baddeley of Bristol's School of Experimental Psychology followed a hunch that the common quantity, often referred to simply as reward, was a representation of what could be gained, together with how risky and uncertain it is. They proposed that these dimensions would be a unique feature of all objects and ...

TEMPE, Ariz. – You may want to ramp up your romance this year by sharing a candlelight dinner, a walk on the beach, or even the scent of a perfume, but will that help you find your perfect mate? For one wasp species, it only takes a whiff of his special love potion to know whether he's "Mr. Right." Unlike humans, most insects rely on their sense of smell when looking for a mate. Scientists have found that sex pheromones play an important role in finding a suitable partner of the same species; yet, little is known about the evolution and genetic basis of these alluring ...

New York, NY (February 13, 2013) —For consumers of the typical Western diet—laden with levels of salt detrimental to long-term health—it may be hard to believe that there is such a thing as an innate aversion to very high concentrations of salt. But Charles Zuker, PhD, and colleagues at Columbia University Medical Center have discovered how the tongue detects high concentrations of salt (think seawater levels, not potato chips), the first step in a salt-avoiding behavior common to most mammals. The findings could serve as a springboard for the development of taste ...

CORVALLIS, Ore. – The greatest battle in Earth's history has been going on for hundreds of millions of years, isn't over yet, and until now no one knew it existed, scientists reported today in the journal Nature. In one corner is SAR11, a bacterium that's the most abundant organism in the oceans, survives where most other cells would die and plays a major role in the planet's carbon cycle. It had been theorized that SAR11 was so small and widespread that it must be invulnerable to attack. In the other corner, and so strange looking that scientists previously didn't ...

PHILADELPHIA — The spring 2011 flood on the Mississippi was among the largest floods ever, the river swelling over its banks and wreaking destruction in the surrounding areas. But a University of Pennsylvania-led study also shows that the flood reaped environmental benefits — transporting and laying down new sediment in portions of the Delta — that may help maintain the area's wetlands. The study, led by Ph.D. student Nicole Khan of the Department of Earth and Environmental Science, is the first to quantify the amount of sediment transported to wetlands by a flood on ...

COLUMBIA, Mo. – Research shows that married people have better mental and physical health than their unmarried peers and are less likely to develop chronic conditions than their widowed or divorced counterparts. A University of Missouri expert says that people who have happy marriages are more likely to rate their health as better as they age; aging adults whose physical health is declining could especially benefit from improving their marriages. Christine Proulx, an assistant professor in the MU Department of Human Development and Family Studies, examined the long-term ...

The structure of a man's face may indicate his tendency to express racially prejudiced beliefs, according to new research published in Psychological Science, a journal of the Association for Psychological Science. Studies have shown that facial width-to-height ratio (fWHR) is associated with testosterone-related behaviors, which some researchers have linked with aggression. But psychological scientist Eric Hehman of Dartmouth College and colleagues at the University of Delaware speculated that these behaviors may have more to do with social dominance than outright aggression. The ...

New research using combined records of ice measurements from NASA's Ice, Cloud and Land Elevation Satellite (ICESat), the European Space Agency's CryoSat-2 satellite, airborne surveys and ocean-based sensors shows Arctic sea ice volume declined 36 percent in the autumn and 9 percent in the winter over the last decade. The work builds on previous studies using submarine and NASA satellite data and confirms computer model estimates that showed ice volume decreases over the last decade, and builds a foundation for a multi-decadal record of sea ice volume changes. In a report ...

New Rochelle, NY, February 13, 2013—When Pope Benedict XVI ends his reign at the end of February he will be the first pope to do so before his death in nearly 600 years. He shocked the Catholic Church by announcing his resignation and set in place a centuries-old process to select his successor. The fascinating Conclaves system for electing a new pope, which has been in place since the late 1200s is described in "Creating the Rules of the Modern Papal Election," published in Election Law Journal, from Mary Ann Liebert, Inc., publishers. The article is available on the Election ...

The reason why some people are worse at learning than others has been revealed by a research team from Berlin, Bochum, and Leipzig, operating within the framework of the Germany-wide network "Bernstein Focus State Dependencies of Learning". They have discovered that the main problem is not that learning processes are inefficient per se, but that the brain insufficiently processes the information to be learned. The scientists trained the subjects' sense of touch to be more sensitive. In subjects who responded well to the training, the EEG revealed characteristic changes ...

Scientists from Stanford University, the Wildlife Conservation Society, the American Museum of Natural History, and other organizations are closing in on the answer to an important conservation question: how many humpback whales once existed in the North Atlantic? Building on previous genetic analyses to estimate the pre-whaling population of North Atlantic humpback whales, the research team has found that humpbacks used to exist in numbers of more than 100,000 individuals. The new, more accurate estimate is lower than previously calculated but still two to three times ...

They can already stand, walk, wriggle under obstacles, and change colors. Now researchers are adding a new skill to the soft robot arsenal: jumping. Using small explosions produced by a mix of methane and oxygen, researchers at Harvard have designed a soft robot that can leap as much as a foot in the air. That ability to jump could one day prove critical in allowing the robots to avoid obstacles during search and rescue operations. The research is described in a Feb. 6 paper in the international edition of Angewandte Chemie. "Initially, our soft robot systems used pneumatic ...

EAST LANSING, Mich. — Hospital beds tend to get used simply because they're available – not necessarily because they're needed, according to a first-of-its-kind study that supports continued regulation of new hospitals. Michigan State University researchers examined all 1.1 million admissions at Michigan's 169 acute-care hospitals in 2010 and found a strong correlation between bed availability and use, even when accounting for myriad factors that may lead to hospitalization. These factors include nature of the ailment, health insurance coverage, access to primary care ...

Neil Hunter's laboratory in the UC Davis College of Biological Sciences has placed another piece in the puzzle of how sexual reproduction shuffles genes while making sure sperm and eggs get the right number of chromosomes. The basis of sexual reproduction is that a fertilized egg gets half its chromosomes from each parent — sperm and eggs each contributing one partner in each pair of chromosomes. We humans have 23 pairs of 46 chromosomes: so our sperm or eggs have 23 chromosomes each. Before we get to the sex part, though, those sperm and eggs have to be formed from ...

A much neglected part of the obesity epidemic is that it has resulted in more overweight/obese women before and during pregnancy. Their offspring also tend to have higher birth weights and more body fat, and carry an increased risk of obesity and chronic diseases later in life. However, the nutritional factors and mechanisms involved pre and during pregnancy that may influence child obesity remain uncertain. A recent publication by ILSI Europe identifies and discusses key contributing factors leading to obesity. In an article recently published in Annals of Nutrition and ...

BETHESDA, Md. (Feb. 13, 2013)—"Good" bacteria that live in our intestines have been linked with a variety of health benefits, from fighting disease to preventing obesity. In a new study, Kriston Ganguli of Massachusetts General Hospital for Children and Harvard Medical School and her colleagues have discovered another advantage to these friendly microscopic tenants: Chemicals secreted by good bacteria that typically live in the intestines of babies could reduce the frequency and severity of a common and often-lethal disease of premature infants. This disease, known as ...

DURHAM, NC -- Marsh plants, far from being passive wallflowers, are "secret gardeners" that actively engineer their landscape to increase their species' odds of survival, says a team of scientists from Duke University and the University of Padova in Italy. Scientists have long believed that the distribution of plants within a marsh is a passive adaption in which species grow at different elevations because that's where conditions like soil aeration and salinity best meet their needs. But this team found intertidal marsh plants in Italy's famed Venetian lagoon were ...