(Boston)--In the largest study to date that examines Post Traumatic Stress Disorder (PTSD) as a risk factor for cancer, researchers from Boston University School of Medicine (BUSM), have shown no evidence of an association. The study, which appears in the European Journal of Epidemiology, is consistent with other population-based studies that report stressful life events generally are not associated with cancer incidence. In addition to corroborating results of other studies, this large population sample allowed for important stratified analyses that showed no strong ...

Our bodies' hormones work together to tell us when to eat and when to stop. But for many people who are obese, this system is off-balance. Now scientists have designed a hormone-like compound to suppress hunger and boost satiety, or a full feeling, at the same time. They report in ACS' Journal of Medicinal Chemistry that obese mice given the compound for 14 days had a tendency to eat less than the other groups. In their study, Constance Chollet and colleagues targeted two main receptors in the body that help keep appetite in check. When hormones bind to ghrelin receptors, ...

WASHINGTON, D.C., May 13, 2015--Policymakers and practitioners have grown increasingly interested in measures of personal qualities other than cognitive ability--including self-control, grit, growth mindset, gratitude, purpose, emotional intelligence, and other beneficial personal qualities--that lead to student success. However, they need to move cautiously before using existing measures to evaluate educators, programs, and policies, or diagnosing children as having "non-cognitive" deficits, according to a review by Angela L. Duckworth and David Scott Yeager published ...

Coffee has gone from dietary foe to friend in recent years, partly due to the revelation that it's rich in antioxidants. Now even spent coffee-grounds are gaining attention for being chock-full of these compounds, which have potential health benefits. In ACS' Journal of Agricultural and Food Chemistry, researchers explain how to extract antioxidants from the grounds. They then determined just how concentrated the antioxidants are. María-Paz de Peña and colleagues note that coffee -- one of the most popular drinks in the world -- is a rich source of a group ...

Several class-action lawsuits filed recently against the makers of flushable wet-wipes have brought to light a serious -- and unsavory -- problem: The popular cleaning products might be clogging sewer systems. But whether the manufacturers should be held accountable is still up in the air, according to an article in Chemical & Engineering News (C&EN), the weekly newsmagazine of the American Chemical Society. Jessica Morrison, assistant editor at C&EN, reports that New York City alone claims to have spent more than $18 million over six years clearing wipes from its wastewater ...

Rats have more heart than you might think. When one is drowning, another will put out a helping paw to rescue its mate. This is especially true for rats that previously had a watery near-death experience, says Nobuya Sato and colleagues of the Kwansei Gakuin University in Japan. Their findings are published in Springer's journal Animal Cognition. Recent research has shown that a rat will help members of its own species to escape from a tubelike cage. The helping rat will show such prosocial behavior even if it does not gain any advantage from it. To see whether these ...

DURHAM, N.C. - Smokers who are able to quit might actually be hard-wired for success, according to a study from Duke Medicine. The study, published in Neuropsychopharmacology, showed greater connectivity among certain brain regions in people who successfully quit smoking compared to those who tried and failed. The researchers analyzed MRI scans of 85 people taken one month before they attempted to quit. All participants stopped smoking and the researchers tracked their progress for 10 weeks. Forty-one participants relapsed. Looking back at the brain scans of the 44 ...

Beekeepers across the United States lost more than 40 percent of their honey bee colonies during the year spanning April 2014 to April 2015, according to the latest results of an annual nationwide survey. While winter loss rates improved slightly compared to last year, summer losses--and consequently, total annual losses--were more severe. Commercial beekeepers were hit particularly hard by the high rate of summer losses, which outstripped winter losses for the first time in five years, stoking concerns over the long-term trend of poor health in honey bee colonies. The ...

MANHASSET, NY -- The Feinstein Institute for Medical Research, the research arm of the North Shore-LIJ Health System, and SetPoint Medical Inc., a biomedical technology company, today released the results of research on the therapeutic potential of vagus nerve stimulation. In a paper published by Bioelectronic Medicine, Kevin J. Tracey, MD, and his colleagues at the Feinstein Institute, explore how low-level electrical stimulation interacts with the body's nerves to reduce inflammation, a fundamental goal of bioelectronic medicine. Prior to this study, it was not understood ...

Scientists at The University of Manchester have made an important discovery about how certain cells stick to each other to form tissue. The team from the Faculty of Life Sciences studied how cells in the skin and heart are bound together through structures called desmosomes. They wanted to understand how these junctions between the cells in the tissue are so strong. Desmosomes are specialised for strong adhesion. They bind the tissue cells together to resist the rigours of everyday life and their failure can result in diseases of the skin and heart, including sudden ...

A part of the performance degradation mechanism of the advanced, electrodeless, helicon plasma thruster with a magnetic nozzle, has been revealed by the research group of Dr. Kazunori Takahashi and Prof. Akira Ando at Tohoku University's Department of Electrical Engineering. An electric propulsion device is a main engine, and a key piece of technology for space development and exploration. Charged particles are produced by electric discharge and accelerated, i.e. momentum is transferred to them via electromagnetic fields. The thrust force is equivalent to the momentum ...

Digital signatures are mechanisms for authenticating the validity or authorship of a certain digital message and they aim to be digital counterparts to real (or analog) signatures. The concept was introduced by Diffie and Hellman in 1976. Notice that, when certified, digital signatures have the same legal power as traditional signatures. With the advent of quantum computation new threats to security became a near future reality and all known digital signatures schemes are vulnerable, compromising fundamental properties of signature schemes: authenticity and authorship ...

Chicago (13 May, 2015)- In the latest issue of the Bulletin of Atomic Scientists, published by SAGE, experts from the United States, Russia, and China present global perspectives on ambitious nuclear modernization programs that the world's nuclear-armed countries have begun. In the latest edition of the Bulletin's Global Forum, Georgetown University professor Matthew Kroenig argues that: "Failure to modernize would not contribute to disarmament - but more than that, it would be irresponsible. A crippled US nuclear force would embolden enemies, frighten allies, generate ...

The recombination of electron shells in molecules, taking just a few dozen attoseconds (a billionth of a billionth of a second), can now be viewed "live," thanks to a new method developed by MIPT researchers and their colleagues from Denmark, Japan and Switzerland. An article detailing the results of their study has been published in the journal Nature Communications. In recent years, scientists have learned how to study ultrafast processes taking place at the atomic and molecular levels, and research in this field is expected to yield some very important results. In ...

This news release is available in German. Chloroplasts are the solar cells of plants and green algae. In a process called photosynthesis, light energy is used to produce biochemical energy and the oxygen we breathe. Thus, photosynthesis is one of the most important biological processes on the planet. A central part of photosynthesis takes place in a specialized structure within chloroplasts, the thylakoid membrane system. Despite its apparent important function, until now it was not clear how this specialized internal membrane system is actually formed. In a collaborative ...

Amsterdam, May 13, 2015 - A new family of molecules that kill cancer cells and protect healthy cells could be used to treat a number of different cancers, including cervical, breast, ovarian and lung cancers. Research published in EBioMedicine shows that as well as targeting and killing cancer cells, the molecules generate a protective effect against toxic chemicals in healthy cells. Cells can become cancerous when their DNA is damaged. Many different things can cause DNA damage, including smoking, chemicals and radiation; understanding exactly what happens at the point ...

London/Zurich, May 13, 2015: Children in European countries tend to report higher levels of satisfaction with their friendships while children in African countries tend to be happier with their school lives. Children in northern European countries are particularly dissatisfied with their appearance and self-confidence. Most of the 50,000 children in the 15 countries rated their satisfaction with life as a whole (on a scale from zero to ten) positively, but the percentage of children with very high well-being (10 out of 10) varied from around 78% in Turkey and 77% in Romania ...

The time needed to genetically sequence the bacteria causing tuberculosis (Mtb) from patient samples has been reduced from weeks to days using a new technique developed by a UCL-led team. This could help health service providers to better treat disease, control transmission of this infection, and monitor outbreaks. Tuberculosis (TB) disease rates in some parts of London are as high as in Sub-Saharan Africa, and drug-resistant strains are becoming increasingly common. These require specific treatments, and if doctors know that a bug is resistant they can start therapy ...

A new study published today in the journal Addiction has compiled the best, most up-to-date evidence on addictive disorders globally. It shows that almost 5% of the world's adult population (240 million people) have an alcohol use disorder and more than 20% (1 billion people) smoke tobacco. Getting good data on other drugs such as heroin and cannabis is much more difficult but for comparison the number of people injecting drugs is estimated at around 15 million worldwide. The "Global Statistics on Addictive Behaviours: 2014 Status Report" goes further in showing that ...

Roughly 1 in 4 women having breast conserving surgery (BCS) return to the surgical suite for further resection because of cancerous tissue left behind due to unclear margins. Investigators at the Optics in Medicine Lab at Dartmouth's Thayer School of Engineering and Norris Cotton Cancer Center, led by Brian W. Pogue, PhD and Keith Paulsen PhD, with first author and PhD candidate David M. McClatchy III, devised a novel approach to perform near infrared (NIR) optical measurements of resected breast tissue after the margins have had their traditional marking by the surgeon ...

(Boston)--Repetitive head injuries that occur during contact sports and military service may accelerate the aging process by increasing the build-up of beta-amyloid in the brain, leading to worse disease and an increased likelihood of developing dementia. In particular, boxers fared the worst among athletes and military veterans with a history of head injuries. These findings, which currently appear online in the journal Acta Neuropathologica, is the first to establish the age-dependent deposition of beta-amyloid in chronic traumatic encephalopathy (CTE), and may lead ...

URBANA, Ill -- Wetlands created 20 years ago between tile-drained agricultural fields and the Embarras River were recently revisited for a new two-year University of Illinois research project. Results show an overall 62 percent nitrate removal rate and little emission of nitrous oxide, a potent greenhouse gas. "Slowing down the rate of flow of the water by intercepting it in the wetland is what helps to remove the nitrate," says Mark David, a University of Illinois biogeochemist in the College of Agricultural, Consumer and Environmental Sciences. "The vegetation that ...

The act of identifying a perpetrator does not just involve memory and thinking, but also constitutes a moral decision. This is because, by the act of identifying or not identifying someone, the eyewitness runs the risk of either convicting an innocent person or letting a guilty person go free. In an article published recently in Archives of Scientific Psychology, Spring et al. (2015) discuss two studies in which children and adolescents of different ages watched a film involving a potential wrong-doing: throwing a lit birthday cake into a wastebasket, either with or without ...

A new study published today in the journal Addiction has compiled the best, most up-to-date evidence on addictive disorders globally. It shows that almost 5% of the world's adult population (240 million people) have an alcohol use disorder and more than 20% (1 billion people) smoke tobacco. Getting good data on other drugs such as heroin and cannabis is much more difficult but for comparison the number of people injecting drugs is estimated at around 15 million worldwide. The "Global Statistics on Addictive Behaviours: 2014 Status Report" goes further in showing that ...

BUFFALO, N.Y. -- Tinnitus is the most common service-related disability for veterans returning from Iraq and Afghanistan. Often described as a ringing in the ears, more than 1.5 million former service members, one out of every two combat veterans, report having this sometimes debilitating condition, resulting in more than $2 billion dollars in annual disability payments by the U.S. Department of Veterans Affairs. Tinnitus is largely a mystery, a phantom sound heard in the absence of actual sound. Tinnitus patients "hear" ringing, buzzing or hissing in their ears much like ...