The Kondo effect in 1982 earned the Nobel Prize in Physics to Kenneth Wilson – the American physicist who passed away this year – who had solved numerically such solid-state physics "problem". Now a group of scientists, including some researchers of the International School for Advanced Studies (SISSA) of Trieste have explored a lesser known variant, predicting theoretically that the phenomenon can be actually observed, and describing its behavior in detail. The Kondo effect, described for the first time in the last century by Japanese physicist Jun Kondo, is observed ...

Many people complain about poor sleep around the full moon, and now a report appearing in Current Biology, a Cell Press publication, on July 25 offers some of the first convincing scientific evidence to suggest that this really is true. The findings add to evidence that humans—despite the comforts of our civilized world—still respond to the geophysical rhythms of the moon, driven by a circalunar clock. "The lunar cycle seems to influence human sleep, even when one does not 'see' the moon and is not aware of the actual moon phase," says Christian Cajochen of the Psychiatric ...

The immunosuppressive drug rapamycin has been shown to increase longevity in mice even when treatment begins at an advanced age. It is unclear if the extension of life also correlates with prolonged health and vigor. In the current issue of the Journal of Clinical Investigation, Dan Ehninger and colleagues at the German Center for Neurodegenrative Diseases evaluated age-associated characteristics in mice treated with rapamycin. They found that rapamycin improved memory and spatial learning, reduced thyroid follicle size, and reduced body fat in older mice. However, many ...

An underlying cause of hearing loss is the death of sensory hair cells in the inner ear, which can be damaged in response to a variety of factors including the use of aminoglycoside antibiotics. Previous research has shown that sensory hair cell death in response to antibiotic treatment can be prevented by triggering the expression of HSP70, a member of the heat shock family of proteins that are induced by cellular stress. In this issue of the Journal of Clinical Investigation, Lisa Cunningham and colleagues at the National Institutes of Health investigate the mechanism ...

A lifespan-extending drug has limited effects on aging The immunosuppressive drug rapamycin has been shown to increase longevity in mice even when treatment begins at an advanced age. It is unclear if the extension of life also correlates with prolonged health and vigor. In the current issue of the Journal of Clinical Investigation, Dan Ehninger and colleagues at the German Center for Neurodegenrative Diseases evaluated age-associated characteristics in mice treated with rapamycin. They found that rapamycin improved memory and spatial learning, reduced thyroid follicle ...

Epilepsy is characterized by recurrent seizures that present in many different ways. In some cases epileptic patients exhibit a progressive increase in both frequency and severity of seizures. Epigenetic changes such as DNA methylation have recently been implied as an underlying cause of several neurologic disorders, including epilepsy. In this issue of the Journal of Clinical Investigation, Detlev Boison and colleagues at Legacy Research show an increase of DNA methylation in the hippocampi of epileptic animals. They found that increased methyation corresponded with ...

Researchers have found in mice that supporting cells in the inner ear, once thought to serve only a structural role, can actively help repair damaged sensory hair cells, the functional cells that turn vibrations into the electrical signals that the brain recognizes as sound. The study in the July 25, 2013 online edition of the Journal of Clinical Investigation reveals the rescuing act that supporting cells and a chemical they produce called heat shock protein 70 (HSP70) appear to play in protecting damaged hair cells from death. Finding a way to jumpstart this process ...

Contact: Terry Collins tc@tca.tc 416-538-8712 United Nations University Managing waters shared across national boundaries: Treasury of papers helps capture 20 years of lessons Sharing Nile's vital flow through 11 nations, water in Arab region, spread of 'world's worst weed,' changes in Atlantic fisheries, among topics in special collection of articles capturing decades of lessons in trans-boundary water management The science-based management and governance of shared transboundary water systems is the focus of a wide-ranging collection of articles now published ...

Researchers at the University of Leeds have discovered how plants set the angles of their branches. While the other principle features governing the architecture of plants such as the control of the number of branches and positioning around the main shoot are now well understood, scientists have long puzzled over how plants set and maintain the angle of their lateral branches relative to gravity. The mechanism is fundamental to understanding the shape of the plants around us: explaining how, for instance, a young Lombardy poplar sends its branches up close to the vertical ...

Many people complain about poor sleep around full moon. Scientists at the University of Basel in Switzerland now report evidence that lunar cycles and human sleep behavior are in fact connected. The results have been published in the journal «Current Biology». The research group around Prof. Christian Cajochen of the Psychiatric Hospital of the University of Basel analyzed the sleep of over 30 volunteers in two age groups in the lab. While they were sleeping, the scientists monitored their brain patterns, eye movements and measured their hormone secretions. The findings ...

Silk has walked straight off the runway and into the lab. According to a new study published in the Journal of Clinical Investigation, silk implants placed in the brain of laboratory animals and designed to release a specific chemical, adenosine, may help stop the progression of epilepsy. The research was supported by the National Institute of Neurological Disorders and Stroke (NINDS) and the National Institute of Biomedical Imaging and Bioengineering (NIBIB), which are part of the National Institutes of Health. The epilepsies are a group of neurological disorders associated ...

VIDEO: This video demonstrates novel techniques of RNA interference (RNAi) which downregulate two genes simultaneously in honey bees using double-stranded RNA (dsRNA) injections. It also presents a protocol of proboscis extension... Click here for more information. On July 25th JoVE, the Journal of Visualized Experiments will publish a new technique that will help scientists better understand the genes that govern food-related behavior in honey bees. The impact of this study ...

VIDEO: Here is a video of mitochondrial power plants (red) passing by synaptic boutons (green) as they move through a nerve cell axon. The Sheng lab showed that their movement helps... Click here for more information. Brain cells talk to each other in a variety of tones. Sometimes they speak loudly but other times struggle to be heard. For many years scientists have asked why and how brain cells change tones so frequently. Today National Institutes of Health researchers ...

HOUSTON, TX.—July 25, 2013—Study* findings published online, ahead of print, in Cornea show that daily dietary supplementation with a unique combination of omega fatty acids (GLA, EPA and DHA) for six months is effective in improving ocular irritation symptoms and halting the progression of inflammation that characterizes moderate to severe dry eye. The multicenter, double-blind, randomized, placebo-controlled clinical trial conducted at Baylor College of Medicine and Virginia Eye Consultants evaluated 38 post-menopausal women with tear dysfunction in both eyes. Participants ...

25 July 2013 / Kiel / Moscow. Why does hurricane activity vary from decade to decade? Or rainfall in the Sahel region? And why are the trans-Atlantic changes frequently in sync? A German-Russian research team has investigated the role of heat exchange between ocean and atmosphere in long-term climate variability in the Atlantic. The scientists analyzed meteorological measurements and sea surface temperatures over the past 130 years. It was found that the ocean significantly affects long term climate fluctuations, while the seemingly chaotic atmosphere is mainly responsible ...

Quantum physics concerns a world of infinitely small things. But for years, researchers from the University of Geneva (UNIGE), Switzerland, have been attempting to observe the properties of quantum physics on a larger scale, even macroscopic. In January 2011, they managed to entangle crystals, therefore surpassing the atomic dimension. Now, Professor Nicolas Gisin's team has successfully entangled two optic fibers, populated by 500 photons. Unlike previous experiments which were carried out with the fiber optics of one photon, this new feat (which has been published in ...

Scientists of Helmholtz-Zentrum Berlin (HZB) and collaborators have now combined the spectroscopic method "RIXS" with so-called ab initio theory in order to describe these processes in detail for a model organometallic catalyst of great interest to catalysis research – the iron carbonyl complex. The team publishes its results today in the prestigious scientific journal "Angewandte Chemie International Edition". Iron carbonyl complexes are used in a large number of chemical reactions and industrial processes, such as light-induced water reduction or catalytic carbon monoxide ...

Researchers studying a type of cell found in the trillions in our brain have made an important discovery as to how it responds to brain injury and disease such as stroke. A University of Bristol team has identified proteins which trigger the processes that underlie how astrocyte cells respond to neurological trauma. The star-shaped astrocytes, which outnumber neurons in humans, are a type of glial cell that comprise one of two main categories of cell found in the brain along with neurons. The cells, which have branched extensions that reach synapses (the connections ...

The new weevil genus was discovered during a routine study of some weevil specimens collected by the Swedish botanist and entomologist Carl Peter Thunberg, a disciple of Carl Linnaeus, during his trips in the then Cape Colony of the Dutch East India Company (now Cape Town, South Africa). The study revealed one tiny specimen measuring barely 1.8mm belonging to an hitherto unknown genus. This specimen was collected between 16 April 1772 and 2 March 1775 or when Thunberg returned from Batavia (now Jakarta, Indonesia) in 1778. Dr Miguel A. Alonso-Zarazaga, a weevil specialist ...

This news release is available in German. A team of physicists has succeeded in performing an extraordinary experiment: They demonstrated how magnetism that generally manifests itself by a force between two magnetized objects acts within a single molecule. This discovery is of high significance to fundamental research and provides scientists with a new tool to better understand magnetism as an elementary phenomenon of physics. The researchers published their results in the latest issue of Nature Nanotechnology (doi: 10.1038/nnano.2013.133). The smallest unit of ...

CAMBRIDGE, Mass- In the aftermath of Japan's earthquake and tsunami in March 2011, the Fukushima Daiichi nuclear plant was initially driven into shutdown by the magnitude 9.0 quake; its emergency generators then failed because they were inundated by the tsunami. But the greatest damage to the complex, and the greatest release of radiation, may have been caused by explosions of hydrogen gas that built up inside some of the reactors. That hydrogen buildup was the result of hot steam coming into contact with overheated nuclear fuel rods covered by a cladding of zirconium ...

This news release is available in German. Astronomers have long assumed that when a galaxy produces too many stars too quickly, it greatly reduces its capacity for producing stars in the future. Now, a group of astronomers that includes Fabian Walter from the Max Planck Institute for Astronomy were able to obtain the first detailed images of this type of self-limiting galactic behaviour: an outflow of molecular gas, the raw material needed for star formation that is coming from star-forming regions in the Sculptor Galaxy (NGC 253). The observations were made with ...

ANN ARBOR—Veterans participating in extended outdoor group recreation show signs of improved mental health, suggesting a link between the activities and long-term psychological well-being, according to results of a new University of Michigan study. Veterans were surveyed before and after a multi-day wilderness recreation experience, which involved camping and hiking in groups of between six and 12 participants. More than half of participants reported that they frequently experienced physical or mental health problems in everyday life. One week after the experience, ...

New Rochelle, NY, July 25, 2013—While ovary removal during hysterectomy protects against future risk of ovarian cancer, the decision to conserve the ovaries and the hormones they produce may have advantages for preventing heart disease, hip fracture, sexual dysfunction, and cognitive decline. Other than a woman's cancer risk, the most important factor that should determine ovarian conservation vs. removal is her age—whether she is older or younger than 50—according to a Review article published in Journal of Women's Health, a peer-reviewed publication from Mary Ann Liebert, ...

ROCHESTER, Minn. -- Bipolar disorder evolves differently in patients who also binge eat, a study by Mayo Clinic, the Lindner Center of HOPE and the University of Minnesota found. Binge eating and obesity often are present among bipolar patients, but the mood disorder appears to take a different path in those who binge eat than it does in obese bipolar patients who do not, the researchers discovered. The findings are published online in the Journal of Affective Disorders. MULTIMEDIA ALERT: Video of Dr. Frye is available for download from the Mayo Clinic News Network. Up ...