August 24, 2015 - In the western foothills and mountain rangelands of the U.S., wild larkspurs (Delphinium spp.) are a major cause of cattle losses. For the most part, grazing cattle can self-regulate consumption of larkspurs and avoid toxicity problems. However, when cattle eat too much, too quickly, or they eat low amounts continuously, toxicity can occur. Symptoms of toxicity include muscle weakness. Cattle also can become non-ambulatory and die. In a recent study published in the Journal of Animal Science, researchers with the USDA-ARS Poisonous Plant Research ...

In the animal world, sexual reproduction can involve males attempting to entice or force females to mate with them, even if they are not initially interested. This male behaviour is driven by conflicts of interest over reproduction and exerts selective pressures on both sexes. A new study on guppies led by the universities of Glasgow and Exeter has given scientists insight into how this behaviour can lead to physiological changes, much like those in athletes who train to perform better. Dr Shaun Killen, of the University of Glasgow, said: "Sexual coercion of females ...

Boulder, Colo., USA - In the last few months, it has once more become clear that large earthquakes can solicit catastrophic landsliding. In the wake of the Nepal earthquake, the landslide community has been warning of persistent and damaging mass wasting due to monsoon rainfall in the epicentral area. However, very little is actually known about the legacy of earthquakes on steep, unstable hillslopes. Using a dense time series of satellite images and air photos, Odin Marc and colleague reconstructed the history of landsliding in four mountain areas hit by large, shallow ...

Washington, DC - August 25, 2015 - Scientists in the Center for Infection and Immunity at the Mailman School of Public Health have discovered a new virus in seals that is the closest known relative of the human hepatitis A virus. The finding provides new clues on the emergence of hepatitis A. The research appears in the July/August issue of mBio, the online open-access journal of the American Society for Microbiology. "Until now, we didn't know that hepatitis A had any close relatives and we thought that only humans and other primates could be infected by such viruses," ...

TAMPA, Fla. - Women who have inherited mutations in the BRCA1 or BRCA2 genes are more likely to develop breast cancer or ovarian cancer, especially at a younger age. Approximately 5 percent of women with breast cancer in the United States have mutations in BRCA1 or BRCA2 based on estimates in non-Hispanic white women. Moffitt Cancer Center researchers recently conducted the largest U.S. based study of BRCA mutation frequency in young black women diagnosed with breast cancer at or below age 50 and discovered they have a much higher BRCA mutation frequency than that previously ...

The burning of incense might need to come with a health warning. This follows the first study evaluating the health risks associated with its indoor use. The effects of incense and cigarette smoke were also compared, and made for some surprising results. The research was led by Rong Zhou of the South China University of Technology and the China Tobacco Guangdong Industrial Company in China, and is published in Springer's journal Environmental Chemistry Letters. Incense burning is a traditional and common practice in many families and in most temples in Asia. It is not ...

Depressed people who turn to their smart phones for relief may only be making things worse. A team of researchers, that included the dean of Michigan State University's College of Communication Arts and Sciences, found that people who substitute electronic interaction for the real-life human kind find little if any satisfaction. In a paper published in the journal Computers in Human Behavior, the researchers argue that relying on a mobile phone to ease one's woes just doesn't work. Using a mobile phone for temporary relief from negative emotions could worsen psychological ...

MADISON -- Colorful and expressive, the eyes are central to the way people interact with each other, as well as take in their surroundings. That makes amblyopia -- more commonly known as "lazy eye" -- all the more obvious, but the physical manifestation of the most common cause of vision problems among children the world over is actually a brain disorder. "Most often in amblyopia patients, one eye is better at focusing," says Bas Rokers, a University of Wisconsin-Madison psychology professor. "The brain prefers the information from that eye, and pushes down the signal ...

Pregnancy could be a turning point for HIV-infected women, when they have the opportunity to manage their infection, prevent transmission to their new baby and enter a long-term pattern of maintenance of HIV care after giving birth--but most HIV-infected women aren't getting that chance. That is the major message from a pair of new studies in Philadelphia, one published early online this month in the journal Clinical Infectious Diseases, and the other published in July in PLOS ONE. The studies, led by a team of researchers from Drexel University and the Philadelphia Department ...

A team from the University of Illinois at Urbana-Champaign and Indiana University combined two techniques to determine the structure of cyanostar, a new abiological molecule that captures unwanted negative ions in solutions. When Semin Lee, a chemist and Beckman Institute postdoctoral fellow at Illinois, first created cyanostar at Indiana University, he knew the chemical properties, but couldn't determine the precise atomical structure. Lee synthesized cyanostar for its unique ability to bind with large, negatively charged ions, which could have applications such as ...

Many political leaders, scientists, educators and parents believe that failure is the best teacher. Scientists have long understood that the brain has two ways of learning. One is avoidance learning, which is a punishing, negative experience that trains the brain to avoid repeating mistakes. The other is reward-based learning, a positive, reinforcing experience in which the brain feels rewarded for reaching the right answer. A new MRI study by USC and a group of international researchers has found that having the opportunity to learn from failure can turn it into ...

Since the early days of fertility treatment, women undergoing IVF treatment have had to place a hormonal gel in their vagina on a daily basis for at least 14 days after embryo transfer. The hormone is necessary to increase the chances of pregnancy, but it may also cause some side effects in the form of irritation and leaky discharge. However, the results of a new scientific study suggest that women will be able to avoid this kind of discomfort in the future. "Fertility treatment is a physical and mental challenge for childless couples. The daily treatment with hormonal ...

Researchers at The Australian National University (ANU) and The University of Sydney have developed a world-first radio-tracking drone to locate radio-tagged wildlife. Lead researcher Dr Debbie Saunders from the ANU Fenner School of Environment and Society said the drones have successfully detected tiny radio transmitters weighing as little as one gram. The system has been tested by tracking bettongs at the Mulligan's Flat woodland sanctuary in Canberra. "The small aerial robot will allow researchers to more rapidly and accurately find tagged wildlife, gain insights into ...

A research team at Linköping University, together with colleagues in Europe and the United States, has shown that at extremely high pressure even the innermost electrons in the atomic nuclei of the metal osmium begin to interact with each other, a phenomenon never witnessed before. The findings have been published in Nature. "If we know more about how a matter works, we will be in a better position to develop materials that withstand extreme conditions. In research we're constantly making advances, but in this case we've taken a giant leap", says Igor Abrikosov, ...

A new £6.65 million grant for research aimed at accelerating the discovery and application of new advanced materials for the energy sector was announced today by the Engineering and Physical Sciences Research Council (EPSRC). The grant, awarded to a team led by Professor Matthew Rosseinsky of the University of Liverpool, will support a programme, Integration of Computation and Experiment for Accelerated Materials Discovery. Professor Rosseinsky will head up an expert team at Liverpool and University College London that will work to tackle the challenge of designing ...

Noroviruses are the predominant cause of gastroenteritis outbreaks in community settings such as hospitals, cruise ships, and schools. The virus is extremely contagious and is mostly transmitted via "fecal-oral-route", i.e., through contaminated hands or contaminated food. Symptoms include violent and sudden onset of diarrhea, vomiting, and nausea. "It is therefore important to provide a safe and harmless disinfectant against human norovirus," explains Grant Hansman, head of CHS junior research group at the German Cancer Research Center noroviruses and the University ...

A simple, safe and cost-free modification to a physical technique used to treat patients in the emergency department with an abnormally fast heart rhythm could improve its effectiveness by more than a quarter, according to a study published in The Lancet today (25 August 2015). An abnormally fast heart rhythm, also called supraventricular tachycardia, can be distressing for patients and many come to emergency departments for treatment. Symptoms can include chest pain, light-headedness, dizziness and breathlessness. Episodes can last from a few seconds or, in extreme cases, ...

This news release is available in German. Trillions of bacteria populate the human gut - which makes them more common than any other cells in our body. The composition of this bacterial population is very variable and influenced by our diet. Diseases, but also antibiotic treatments can induce significant shifts in this equilibrium. If entire bacterial groups suddenly multiply heavily, critical situations occur. They damage the intestinal tissue and cause inflammations. How such shifts are triggered largely remained a mystery. Physiologists from the University of Zurich ...

This news release is available in German. Root bacteria are known to form symbiotic relationships with plants by improving the plants' supply of nutrients. Yet as scientists at the Max Planck Institute for Chemical Ecology in Jena, Germany, found recently, the bacteria actually play a much more profound role. During field experiments in Utah, in the western USA, researchers discovered that the right mixture of soil microbiota directly influences the survival of Nicotiana attenuata, a species of wild tobacco. Plants that had been unable to establish a protective ...

University of Manchester scientists have bridged a gap between two separate pieces of small intestine kept alive outside the body, in an advance which could have implications for surgery in human adults and babies. It is not currently possible to study the intestine in embryos when inside the body, which holds back advances in treatment for conditions causing damage in infants. However, new techniques used by the researchers in this study have allowed organs to be kept alive and grown on supports which allow the absorption of nutrients. A video is available here or ...

In an era where popular culture is increasingly recognized for its impact on lay understanding of health and medicine, few scholars have looked at television's powerful role in the creation of patient expectations, especially regarding pregnancy and birth. As part of a larger research project funded by a National Science Foundation Dissertation Improvement Grant, Danielle Bessett, University of Cincinnati assistant professor of sociology in the McMicken College of Arts and Sciences examined how women understand their television viewing practices regarding pregnancy and ...

A team of researchers at the U.S. Department of Energy (DOE)'s Lawrence Berkeley National Laboratory (Berkeley Lab) developing a bioinorganic hybrid approach to artificial photosynthesis have achieved another milestone. Having generated quite a buzz with their hybrid system of semiconducting nanowires and bacteria that used electrons to synthesize carbon dioxide into acetate, the team has now developed a hybrid system that produces renewable molecular hydrogen and uses it to synthesize carbon dioxide into methane, the primary constituent of natural gas. "This study represents ...

Waterford, Ireland, August 24, 2015 - Ongoing European Research Council-funded research at Waterford Institute of Technology's (WIT) Macular Pigment Research Group (MPRG) is investigating the potential link between cognitive function and levels of a vital eye pigment linked to diet. The study suggests that measuring macular pigment offers potential as a biomarker of cognitive health. The results of this study are highlighted to a global audience through the prestigious international medical journal, the Journal of Alzheimer's Disease. The Waterford clinical trial research, ...

Tahiti is a popular tourist destination, but one unwanted visitor has decided to make its home there: the brown widow spider (Latrodectus geometricus). A paper published in the Journal of Medical Entomology has reported the discovery of the spider for the first time on Tahiti and also on four of the Cook Islands. The brown widow is a known invasive species. It has been found in South America, Central America, North America, the Caribbean islands, and a host of Pacific islands. It was first found in French Polynesia in 2006, when it was discovered on the island of Moorea. ...

WASHINGTON (Aug. 25, 2015)--In the most comprehensive study to date, researchers at the George Washington University have identified a potential link between microbes (viruses, bacteria and fungi) in the throat and schizophrenia. This link may offer a way to identify causes and develop treatments of the disease and lead to new diagnostic tests. "The oropharynx of schizophrenics seems to harbor different proportions of oral bacteria than healthy individuals," said Eduardo Castro-Nallar, a Ph.D. candidate at GW's Computational Biology Institute (CBI) and lead author of ...