Washington, D.C. (October 19, 2010) -- Chinese researchers, reporting in the Journal of Applied Physics, published by the American Institute of Physics, have described a new breakthrough in understanding the way electrons travel around quantum dots. This might lead to promising new fabrication methods of novel quantum devices. Guodong Li and colleagues at the National Center for Nanoscience and Technology in Beijing carried out an experiment using self-assembled quantum dots and a two-dimensional electron gas, and then fit the data to a model to find out the type of ...

WASHINGTON, D.C., (Oct. 20, 2010) -- Just as landscape photographs shot in low-angle light dramatically accentuate subtle swales and mounds, depositing metal vapors at glancing angles turns a rough surface into amazing nanostructures with a vast range of potential properties. For decades, vapor deposition has been a standard technique for creating modern microelectronic circuits. But nearly all of industry's efforts have been devoted to making structures as flat and smooth as possible. Rather than placing metal sources in the high-noon position used to make featureless ...

WASHINGTON, D.C., (Oct. 20, 2010) -- A team of researchers in North Carolina has discovered that lubricin, a synovial fluid glycoprotein, reduces wear to bone cartilage. This result, which has implications for the treatment of sufferers of osteoarthritis, will be presented today at the AVS 57th International Symposium & Exhibition, taking place this week at the Albuquerque Convention Center in New Mexico. Osteoarthritis is the most common form of arthritis, the degenerative joint disease. It mostly affects cartilage, the slippery tissue that covers the ends of bones ...

WASHINGTON, D.C., (Oct. 20, 2010) -- The capture and storage of carbon dioxide in deep geologic formations, a strategy for minimizing the impacts of greenhouse gases on global warming, may currently be technologically feasible. But one key question that must be answered is the ability of subsurface materials to maintain their integrity in the presence of supercritical carbon dioxide -- a fluid state in which the gas is condensed at high temperature and pressure into a liquid. A research team at the Pacific Northwest National Laboratory has developed tools in EMSL, a ...

PROVIDENCE, R.I. [Brown University] — The JC polyomavirus doesn't strike very often, but it's a mean bug that preys on people with weakened immune systems, including people with AIDS, and almost always kills them. Now an international team of scientists at Brown University, the University of Tübingen in Germany, and Imperial College in London has found a potential Achilles Heel and painted a target on it: The virus must bind to a very specific sugar molecule dangling from the side of the brain cells it attacks. Like the rebel forces in the 1977 classic movie Star Wars, ...

The last two decades have seen tremendous progress in understanding the genetic basis of human brain disorders. Research developments in this area have revealed fundamental insights into the genes and molecular pathways that underlie neurological and psychiatric diseases. In a new series of review articles published by Cell Press in the October 21 issue of the journal Neuron, experts in the field discuss exciting recent advances in neurogenetics research and the potential implications for the treatment of these devastating disorders. Genetic discoveries have transformed ...

NEW YORK (Oct. 20, 2010) -- In a report published in the Oct. 20 issue of Science Translational Medicine, researchers at NewYork-Presbyterian Hospital/Weill Cornell Medical Center say animal and human data suggest gene therapy to the brain may be able to treat patients with major depression who do not respond to traditional drug treatment. The researchers hope to rapidly translate their findings into a human clinical trial using the same kind of gene therapy modality the investigators have pioneered to treat Parkinson's disease. A 45-patient randomized blinded phase II ...

(Boston) - Despite the promising results of the "Placement of Aortic Transcatheter Valves (PARTNER) trial," featured in the Oct. 21 issue of the New England Journal of Medicine, a cardiothoracic surgeon from Boston Medical Center (BMC) believes that surgical aortic-valve replacement should remain the standard treatment of aortic stenosis. In the accompanying editorial, the author argues that Transcatheter aortic-valve implantation (TAVI) should be reserved for patients at inordinately high risk who are not suitable candidates for surgery and who have decreased life expectancy. ...

The evolution of complex life is strictly dependent on mitochondria, the tiny power stations found in all complex cells, according to a new study by Dr Nick Lane, from UCL (University College London), and Dr William Martin, from the University of Dusseldorf. "The underlying principles are universal. Energy is vital, even in the realm of evolutionary inventions," said Dr Lane, UCL Department of Genetics, Evolution and Environment. "Even aliens will need mitochondria." For 70 years scientists have reasoned that evolution of nucleus was the key to complex life. Now, in ...

In a galaxy far away, an exceptionally massive black hole is traveling around a massive star in an unusually tight orbit. Also odd, the star is not as bright as it should be. Astronomers have puzzled over this X-ray binary system, named M33 X-7, but no one could explain all of its features. Now a Northwestern University research team has. The researchers have produced a model of the system's evolutionary history and formation that explains all of the system's observational characteristics: the tight orbit, the large masses of the star and black hole, the X-ray luminosity ...

New space research published this week (Thursday 21 October) in the journal Nature, has settled decades of scientific debate. Researchers from the University of California (UCLA) and British Antarctic Survey (BAS) have found the final link between electrons trapped in space and the glow of light from the upper atmosphere known as the diffuse aurora. The research will help us understand 'space weather', with benefits for the satellite, power grid and aviation industries, and how space storms affect the Earth's atmosphere from the top down. Scientists have long understood ...

A European team of astronomers using ESO's Very Large Telescope (VLT) has measured the distance to the most remote galaxy so far. By carefully analysing the very faint glow of the galaxy they have found that they are seeing it when the Universe was only about 600 million years old (a redshift of 8.6). These are the first confirmed observations of a galaxy whose light is clearing the opaque hydrogen fog that filled the cosmos at this early time. The results will be presented at an online press conference with the scientists on 19 October 2010, and will appear in the 21 October ...

HOUSTON - Long overshadowed by p53, its famous tumor-suppressing sibling, the p63 gene does the tougher, important job of stifling the spread of cancer to other organs, researchers at The University of Texas MD Anderson Cancer Center report in the Oct. 21 issue of Nature. Not only does a specific form of p63 protein block metastasis, but it does so by activating the enzyme Dicer, which plays a pivotal role in the creation of micro RNAs, tiny bits of RNA that regulate a host of cellular processes. "p63 is a master regulator of metastasis, an important role in its own ...

Researchers from Mount Sinai School of Medicine, in collaboration with investigators of the National Institute of Health and Medical Research (INSERM) of France led by Nicolae Ghinea, PhD, have found a common link among several malignant tumor types in all grades of cancer. This breakthrough may ultimately provide a new diagnostic or therapeutic target to detect cancer early or stop tumor growth. The study is published in the October 21 issue of The New England Journal of Medicine. The team discovered that a hormone receptor typically found in human reproductive organs ...

COLUMBUS, Ohio – A new study led by Ohio State University cancer researchers describes a novel cancer-specific protein that is present in a broad range of cancer types and at all stages of tumor development, from premalignant cells to metastatic tumor cells. If verified, the antigen could serve as a marker for the early detection and treatment of primary and metastatic tumors, and provide a target for the development of anticancer therapies, the researchers say. In addition, a vaccine designed to target these cancer-cell proteins, called Piwil2-like (PL2L) proteins, ...

Groundbreaking research into fingerprint detection developed at the University of Leicester now has an industrial application, thanks to a new invention by the scientist who developed the technique. Dr John Bond's method of identifying fingerprints on brass bullet-casings, even after they have been wiped clean, was based on the minuscule amounts of corrosion which can be caused by sweat. First announced in 2008, this breakthrough was cited as one of the technologies 'most likely to change the world' by a panel of experts for BBC Focus magazine and was included in Time ...

A research team from Nanyang Technological University (NTU) has successfully designed the world's smallest on-chip low-pass filter which is 1,000 times smaller than existing off-chip filters. A low-pass filter is a circuit that allows low-frequency signals to pass through while reducing unwanted high-frequency signals from passing through. Compared to existing off-chip filters, which are discrete and bulky components, on-chip filters occupy a small area on integrated circuit chips, which can be found in portable devices such as mobile phones, laptops, vehicle-mounted ...

Sea levels around the Falkland Islands in the South Atlantic have risen since the mid nineteenth century and the rate of sea-level rise has accelerated over recent decades, according to newly published research. The findings are as expected under global warming and consistent with observations elsewhere around the globe. "We have been fortunate in being able to compare modern sea-level measurements obtained from tide gauges and from satellite radar altimeters with historical measurements made at Port Louis in the Falkland Islands in 1842," explained researcher Prof. Philip ...

BOSTON (October 20, 2010) - People who consume several servings of whole grains per day while limiting daily intake of refined grains appear to have less of a type of fat tissue thought to play a key role in triggering cardiovascular disease and type 2 diabetes, a new study suggests. Researchers at the Jean Mayer USDA Human Nutrition Researcher Center on Aging (USDA HNRCA) at Tufts University observed lower volumes of visceral adipose tissue (VAT) in people who chose to eat mostly whole grains instead of refined grains. "VAT volume was approximately 10 % lower in adults ...

The follicle stimulating hormone, FSH, targets the human reproductive organs: the ovaries and testicles. In women, it stimulates maturation of ovarian follicles and production of oestrogens (via its action on granulosa cells). In men, it stimulates production of spermatozoa (via its action on the Sertoli cells). FSH receptor, which was the subject of the work carried out by the Inserm researchers, is normally only found in cells stimulated by FSH (granulosa cells in women and Sertoli cells in men). However, it is also present in very small quantities in the blood vessels ...

Hydroelectric power is the oldest and the "greenest" source of renewable energy. In Germany, the potential would appear to be completely exploited, while large-scale projects in developing countries are eliciting strong criticism due to their major impact on the environment. Researchers at Technische Universitaet Muenchen (TUM) have developed a small-scale hydroelectric power plant that solves a number of problems at the same time: The construction is so simple, and thereby cost-efficient, that the power generation system is capable of operating profitably in connection ...

ANN ARBOR, Mich.---A groundbreaking new equation developed in part by researchers at the University of Michigan could do for organic semiconductors what the Shockley ideal diode equation did for inorganic semiconductors: help to enable their wider adoption. Without the Shockley equation, the computers of today would not be possible. Developed in 1949 by William Shockley, the inventor of the transistor, the Shockley equation describes the relationship between electric current and voltage in inorganic semiconductors such as silicon. The new equation describes the ...

Recent work by Dr. David Lohman, assistant professor of biology at The City College of New York, suggests the Philippines, considered by biologists to be a "biodiversity hotspot," could have more unique species of birds than previously thought. If that proves to be the case, it could have important ramifications for conservation practices there. Many of the animal species found in the Philippines are endemic to this nation, which is made up of more than 7,100 islands. For example, 64 percent of its land mammal species and 77 percent of its amphibians are not found anywhere ...

In the brain, dopamine is involved in a number of processes that control the way we behave. If an action results in the substance being released, we are more likely to repeat the action. This applies to actions such as eating, sexual intercourse or winning a competition. However, the same also holds true when individuals take harmful narcotics. Scientists believe that mental illnesses such as schizophrenia can be linked to dopamine imbalances. Learning signal If an action leads to a better response than expected, the brain will temporarily release more dopamine. If ...

Over the last few decades, the dramatic rise in pediatric obesity rates has emerged as a public health threat requiring urgent attention. The responsibility of identifying and treating eating and weight-related problems early in children and adolescents falls to health care providers and other professionals who work with the child, according to Professor Denise Wilfley and colleagues from the Department of Psychiatry at Washington University School of Medicine in the US. Furthermore, the key to successful treatment is a team effort involving providers and parents. Wilfley's ...