New research from scientists at McMaster University reveals exercise-related testosterone and growth hormone do not play an influential role in building muscle after weightlifting, despite conventional wisdom suggesting otherwise. The findings indicate that bodybuilders who look to manipulate those hormones through exercise routines are wasting their time. In two separate studies, published in the Journal of Applied Physiology and the European Journal of Applied Physiology, researchers found anabolic hormones—long thought to be essential for building a muscular frame—do ...

Using individual molecules instead of electronic or magnetic memory cells would revolutionise data storage technology, as molecular memories could be thousand-fold smaller. Scientists of Kiel University took a big step towards developing such molecular data storage. They succeeded in selectively switching on and off the magnetism of individual molecules, so-called spin-crossover complexes, by electrons. The interdisciplinary study is part of the Collaborative Research Centre 677 "Functions by Switching", which is funded by the German Research Foundation (DFG). The results ...

People who were sexually unfaithful without their partner's knowledge were less likely to practice safe sex than those who had other sexual relationships with their partner's consent. They were also more likely to be under the influence of drugs and alcohol at the time of the encounter. In a study published in The Journal of Sexual Medicine, researchers from the University of Michigan, USA, found that condom use for vaginal and anal sex was 27% and 35% lower in sexually unfaithful relationships and drug and alcohol use was 64% higher. Of the 1,647 people who replied ...

Adult lesbian and bisexual women are more likely to report childhood abuse and adult sexual assault than heterosexual women, according to a new study by Dr. Keren Lehavot from the VA Puget Sound Health Care System in Seattle, USA and her collaborators. Furthermore, the researchers' work shows that women who are more butch report more abuse in childhood, particularly physical and emotional neglect, while women who identify as femme, and have a more feminine appearance, report more adult sexual assaults. The work is published online in Springer's journal, Sex Roles. It ...

INDIANAPOLIS -- A new study shows that a practical clinical tool developed by researchers from the Regenstrief Institute and the Indiana University School of Medicine to measure severity of dementia symptoms is reliable and valid. The Healthy Aging Brain Care Monitor is simple, user-friendly and sensitive to change in symptoms. "The HABC Monitor is a 'blood pressure cuff' for dementia," said Regenstrief Institute investigator Malaz Boustani, M.D., MPH, associate professor of medicine and associate director of the IU Center for Aging Research. A geriatrician, Dr. Boustani ...

Researchers from the University of Sheffield's Faculty of Engineering measured air quality inside and outside three residential buildings with different types of energy use (gas vs. electric cookers). They found that nitrogen dioxide (NO2) levels in the kitchen of the city-centre flat with a gas cooker were three times higher than the concentrations measured outside the property and well above those recommended in UK Indoor Air Quality Guidance (1). These findings are published online in Journal of Indoor and Built Environment (2). "We spend 90 per cent of our time indoors ...

COLUMBIA, Mo. – This past March was the second warmest winter month ever recorded in the Midwest, with temperatures 15 degrees above average. The only other winter month that was warmer was December of 1889, during which temperatures were 18 degrees above average. Now, MU researchers may have discovered why the weather patterns during these two winter months, separated by 123 years, were so similar. The answer could help scientists develop more accurate weather prediction models. Tony Lupo, chair of the Department of Soil, Environment and Atmospheric Sciences in the ...

An ancient heart drug that's inspired the work of herbalists and poets for centuries may treat a condition that plagues millions of overstressed and overweight Americans today. Since the 13th century, the herb Foxglove has been used to cleanse wounds and its dried leaves were brewed by Native Americans to treat leg swelling caused by heart problems. In an article published online today in Molecular Pharmacology, researchers at the University of Michigan Health System reveal that digoxin, the active ingredient in digitalis, or Foxglove, can enhance the body's own protective ...

Amsterdam, NL, June 14, 2012 – No effective treatments are currently available for the prevention or cure of Alzheimer's disease (AD), the most frequent form of dementia in the elderly. The most recognized risk factors, advancing age and having the apolipoprotein E Ɛ4 gene, cannot be modified or treated. Increasingly, scientists are looking toward other risk factors to identify preventive and therapeutic strategies. Much attention recently has focused on the metabolic syndrome (MetS), with a strong and growing body of research suggesting that metabolic disorders ...

MADISON – The first U.S. population prevalence study of mutations in the gene that causes fragile X syndrome, the most common inherited form of intellectual disability, suggests the mutation in the gene – and its associated health risks – may be more common than previously believed. Writing this month (June 2012) in the American Journal of Medical Genetics, a team of Wisconsin researchers reports that the cascade of genetic amino acid repeats, which accumulate over generations and culminate in the mutation of a single gene causing fragile X, is occurring with more frequency ...

COLUMBUS, Ohio – An international team of scientists has sequenced the genome of the bonobo, a primate that, along with chimpanzees, is the closest living relative of humans. Unlike chimpanzees, which have an aggressive nature, bonobos tend to be peaceful, playful and highly sexual. The study, published online in the journal Nature, compares the bonobo genome to the genomes of chimpanzees and humans. As part of the study, scientists at the Ohio State University Comprehensive Cancer Center – Arthur G. James Cancer Hospital and Richard J. Solove Research Institute (OSUCCC ...

Like many new measurement tools, the laser frequency comb seemed at first a curiosity but has found more practical uses than originally imagined. The technique for making extraordinarily precise measurements of frequency has now moved beyond physics and optics to advance biomedicine by helping researchers evaluate a novel instrument that kills harmful bacteria without the use of liquid chemicals or high temperatures. Generated by ultrafast lasers, frequency combs precisely measure individual frequencies (colors) of light. Researchers at JILA, operated jointly by the ...

The targets, indicators and approaches being used to pursue progress towards sustainable development at Rio+20 are counter-productive, say scientists in a new paper. Goals focussing on one-track scientific solutions to the most urgent sustainability problems fail to respond to the uncertainty and shifting dynamics of today's world. These one-direction approaches risk breaching the already weakened planetary boundaries which define a safe operating space for humanity, while undoing past progress on global poverty reduction. Instead, sustainable futures should be plotted ...

WASHINGTON — American research universities are essential for U.S. prosperity and security, but the institutions are in danger of serious decline unless the federal government, states, and industry take action to ensure adequate, stable funding in the next decade, says a new report by the National Research Council, the operating arm of the National Academy of Sciences and National Academy of Engineering. As trusted stewards of public funds, universities must also meet "bold goals" to contain costs, enhance productivity, and improve educational pathways to careers both ...

'Green grabbing' - the rapidly-growing appropriation of land and resources in the name of 'green ' biofuels, carbon offsetting schemes, conservation efforts and eco-tourism initiatives – is forcing people from their homelands and increasing poverty, new research has found. Ecosystems being 'asset-stripped' for profit is likely to cause dispossession and further poverty amongst already-poor land and resource users, according to a set of 17 new research case studies from Africa, Asia and Latin America, published in a special issue of the Journal of Peasant Studies. "Green ...

MAYWOOD, Il. -- Loyola University Chicago researchers are taking advantage of a quirk in the evolution of fruit fly genes to help develop new weapons against cancer. A newly discovered fruit fly gene is a simplified counterpart of two complex human genes that play important roles in the development of cancer and some birth defects. As this fruit fly gene evolved, it split in two. This split has made it easier to study, and the resulting insights could prove useful in developing new cancer drugs. "Evolution has given us a gift," said Andrew K. Dingwall, PhD, senior author ...

In the battle against HIV/AIDS conditions on the frontlines are constantly in flux as treatment, research and policy evolve. The landmark HIV Prevention Trials Network (HPTN) 052 study, which established that antiretroviral treatment in people who are HIV positive decreases the likelihood of transmitting HIV to their sexual partners, was no exception. One year after publication the study serves as a case study of ethical challenges faced at every stage of the research trial process in the new paper "Establishing HIV treatment as prevention in the HIV Prevention Trials ...

EUGENE, Ore. -- (June 14, 2012) -- University of Oregon scientists have discovered how the bacterium Helicobacter pylori navigates through the acidic stomach, opening up new possibilities to inactivate its disease-causing ability without using current strategies that often fail or are discontinued because of side effects. Their report -- online ahead of regular publication July 3 in the journal Structure -- unveils the crystal structure of H. pylori's acid receptor TlpB. The receptor has an external protrusion, identified as a PAS domain, bound by a small molecule called ...

Soaring numbers of older, sicker prisoners are causing an unprecedented health care challenge for the nation's criminal justice system, according to a new UCSF report. As the American penal system confronts a costly demographic shift toward older prisoners, the authors call for an overhaul in health care practices for elderly inmates who disproportionately account for escalating medical expenses behind bars. The recommendations include screening for dementia among prisoners, improved palliative care, and standard policies for geriatric housing units for infirm inmates. The ...

Energy efficiency is the most significant challenge standing in the way of continued miniaturization of electronic systems, and miniaturization is the principal driver of the semiconductor industry. "As we approach the ultimate limits of Moore's Law, however, silicon will have to be replaced in order to miniaturize further," said Jeffrey Bokor, deputy director for science at the Molecular Foundry at the Lawrence Berkeley National Laboratory and Professor at UC-Berkeley. To this end, carbon nanotubes (CNTs) are a significant departure from traditional silicon technologies ...

Visual and auditory stimuli that elicit high levels of engagement and emotional response can be linked to reliable patterns of brain activity, a team of researchers from The City College of New York and Columbia University reports. Their findings could lead to new ways for producers of films, television programs and commercials to predict what kinds of scenes their audiences will respond to. "Peak correlations of neural activity across viewings can occur in remarkable correspondence with arousing moments of the film," the researchers said in an article published in the ...

An international team of researchers' study of the spatial patterns of the spread of obesity suggests America's bulging waistlines may have more to do with collective behavior than genetics or individual choices. The team, led by City College of New York physicist Hernán Makse, found correlations between the epidemic's geography and food marketing and distribution patterns. "We found there is a relationship between the prevalence of obesity and the growth of the supermarket economy," Professor Makse said. "While we can't claim causality because we don't know whether obesity ...

CHAMPAIGN, Ill. — Experienced anglers know that choppy waters make for difficult fishing, so they try not to rock the boat. Thanks to a new microscopy technique, cell biology researchers can heed that same advice. University of Illinois researchers developed a method they call "trolling AFM," which allows them to study soft biological samples in liquid with high resolution and high quality. Led by mechanical science and engineering professor Min-Feng Yu, the group published its findings in the journal Nanotechnology. "We developed a highly sensitive method for high-resolution ...

(Boston) – A recent study conducted by researchers at Boston Medical Center (BMC) shows that patients receiving "take home" methadone maintenance treatment (MMT) were less likely to be admitted to the hospital as compared to those not receiving take home doses. The findings, which are published online in the Journal of Addiction Medicine, demonstrate the potential benefits of successful addiction treatment, including better overall health and decreased health care utilization. This research was led by Alexander Walley, MD, MSc, physician in general internal medicine at ...

Nine out of 10 Californians under the age of 65 will be enrolled in health insurance programs as a result of the Patient Protection and Affordable Care Act (ACA), according to a joint study by the UC Berkeley Center for Labor Research and Education and the UCLA Center for Health Policy Research. Between 1.8 million and 2.7 million previously uninsured Californians will gain coverage by 2019, when the law's effect is fully realized, the researchers said. The report, which uses a sophisticated computer simulation model to project the ACA's impact on insurance coverage, ...