This news release is available in German. How can a beam of light tell the difference between left and right? At the Vienna University of Technology (TU Wien) tiny particles have been coupled to a glass fibre. The particles emit light into the fibre in such a way that it does not travel in both directions, as one would expect. Instead, the light can be directed either to the left or to the right. This has become possible by employing a remarkable physical effect – the spin-orbit coupling of light. This new kind of optical switch has the potential to revolutionize ...

They emerge at night, while we sleep unaware, growing and spreading out as quickly as they can. And they are deadly. In a surprise finding that was recently published in Nature Communications, Weizmann Institute of Science researchers showed that nighttime is the right time for cancer to grow and spread in the body. Their findings suggest that administering certain treatments in time with the body's day-night cycle could boost their efficiency. This finding arose out of an investigation into the relationships between different receptors in the cell – a complex network ...

Over the years, researchers have described how some of the body's cells have giant channels – a kind of holes that completely uncritically allow both small and large molecules to penetrate into and out of the cell. The hypothesis is that these normally closed gatekeeper proteins in the cell membrane allow unrestricted access in the event of diseases such as myocardial infarction, stroke or Alzheimer's. If the hypothesis was correct, the obvious choice would be to look for novel drugs to block the relevant membrane proteins and in this way cure or prevent disease. New ...

A specialist group of European researchers are studying the remains of prehistoric human settlements which are now submerged beneath our coastal seas. Some of these drowned sites are tens of thousands of years old. From the progressive discovery and analysis of these prehistoric remains, a new scientific field has emerged, combining the expertise from many disciplines including archaeology, oceanography and the geosciences. The new field is called Continental Shelf Prehistoric Research. This rapidly evolving research field is the focus of a new European Marine Board ...

Since the first human fetal surgery was reported in 1965, several different fetal surgical procedures have been developed and perfected, resulting in significantly improved outcomes for many fetuses. However, the significant investments associated with this highly specialized service and quality metrics must be considered as more fetal treatment programs are developed. Katharine D. Wenstrom, MD, director of the Division of Maternal-Fetal Medicine at Women & Infants Hospital of Rhode Island, co-director of the hospital's Integrated Program for High-Risk Pregnancy, and ...

WASHINGTON, Oct. 6, 2014 — It's happened to many of us: Half asleep in the morning, you finish brushing your teeth and reach for your daily glass of orange juice. After taking a big swig, you spit it back out, making a face like you've just chewed on a lemon. Turns out, a specific chemical in your toothpaste is responsible for that nasty taste. This week, Reactions explains why toothpaste and orange juice don't mix. Learn all about it at https://www.youtube.com/watch?v=9X5_gtel-c0. Subscribe to the series at Reactions YouTube, and follow us on Twitter @ACSreactions to ...

Quantum computing will allow for the creation of powerful computers, but also much smarter and more creative robots than conventional ones. This was the conclusion arrived at by researchers from Spain and Austria, who have confirmed that quantum tools help robots learn and respond much faster to the stimuli around them. Quantum mechanics has revolutionised the world of communications and computers by introducing algorithms which are much quicker and more secure in transferring information. Now researchers from the Complutense University of Madrid (UCM) and the University ...

The way neurons are interconnected in the brain is very complicated. This holds especially true for the cells of the hippocampus. It is one of the oldest brain regions and its form resembles a see horse (hippocampus in Latin). The hippocampus enables us to navigate space securely and to form personal memories. So far, the anatomic knowledge of the networks inside the hippocampus and its connection to the rest of the brain has left scientists guessing which information arrived where and when. Signals spread through the brain Accordingly, Dr Martin Pyka and his colleagues ...

New research by scientists at the University of Bristol has challenged one of the key axioms in biology - that enzymes need water to function. The breakthrough could eventually lead to the development of new industrial catalysts for processing biodiesel. Enzymes are large biological molecules that catalyse thousands of different chemical reactions that are essential for all life, from converting food into energy, to controlling how our cells replicate DNA. Throughout this diverse range of biological environments in which enzymes perform their various roles, the only ...

Plants that come under attack from pathogens have an automatic immune response. Fungi get around this plant immunity by injecting proteins into the host plant cells. These 'effector proteins' enable the fungi to escape the plant's immune system and allow the fungal cells to enter the plant unrecognised. Exeter scientists have now shown that signalling organelles, known as 'early endosomes' act as long distance messengers in the fungi. They travel rapidly along long tube-like cells between the plant-invading fungal cell tip and the fungal cell nucleus. This rapid communication ...

PITTSBURGH—One way to combat the rising level of errors and fraud in life sciences research is through massive online laboratories, which use videogames to engage large numbers of non-professional investigators and prevent scientists from manually testing their own hypotheses, researchers from Carnegie Mellon University and Stanford University say. Though unconventional, CMU's Adrien Treuille and Stanford's Rhiju Das argue that this online, game-like approach actually is more scientifically rigorous than the standard practice of scientists proposing an explanation for ...

This news release is available in Spanish. [Gondar, Ethiopia and Geneva, Switzerland – October 6, 2014] - The international research & development (R&D) consortium, AfriCoLeish, formed by six research organizations from East Africa and Europe, has launched a Phase III clinical study to address the extreme difficulty in treating visceral leishmaniasis (VL) in patients who also are HIV-positive. The study will assess the efficacy and the safety of two treatments: a combination treatment of AmBisome® and miltefosine, and AmBisome® alone. This is the first randomized clinical ...

New research confirms that sleep disturbances are linked to pain and depression, but not disability, among patients with osteoarthritis (OA). Study results published in Arthritis Care & Research, a journal of the American College of Rheumatology (ACR), found that poor sleep increases depression and disability, but does not worsen pain over time. Arthritis is one of the top three health concerns that cause disability in the U.S., with OA being the most common form of arthritis. Medical evidence reports that nearly 30 million Americans are affected by OA, which has increased ...

PROVIDENCE, R.I. [Brown University] — Within our fat lives a variety of cells with the potential to become bone, cartilage, or more fat if properly prompted. This makes adipose tissue, in theory, a readily available reservoir for regenerative therapies such as bone healing if doctors can get enough of those cells and compel them to produce bone. In a new study in the journal Stem Cell Research & Therapy, scientists at Brown University demonstrate a new method for extracting a wide variety of potential bone-producing cells from human fat. They developed a fluorescent tag ...

An innovative patient management system at the acute stroke unit of Kelowna (BC) General Hospital has reduced the number of stroke patient bed days by more than 25 per cent, according to a study of the system presented at the annual Canadian Stroke Congress in Vancouver. In total, it is estimated the new system is saving the 380-bed hospital more than 1,000 bed days per year. This represents annual savings of up to $800,000, all achieved without the need for any new investment in devices, treatments or personnel. "It's a win-win situation," says Dr. John B. Falconer, ...

At the first sign of a stroke, time is of the essence. For every minute of delay in treatment, people typically lose almost two million brain cells. Yet a new study presented at the Canadian Stroke Congress reveals that those delays – in getting the right tests and the right drugs – can be longer when people experience a stroke in a hospital. Investigators from the University of Toronto Faculty of Medicine, the Institute for Clinical Evaluative Sciences (ICES) and the University Health Network looked at data from acute care facilities in Ontario over nine years. They ...

Researchers at the University of Texas Medical Branch at Galveston say that sexting may be the new "normal" part of adolescent sexual development and is not strictly limited to at-risk teens. The findings, published in the journal Pediatrics, are from the first study on the relationship between teenage sexting, or sending sexually explicit images to another electronically, and future sexual activity. The study results indicate that sexting may precede sexual intercourse in some cases and further cements the idea that sexting behavior is a credible sign of teenage sexual ...

We might love to reminisce and tell others about our extraordinary experiences — that time we climbed Mt. Kilimanjaro, got to taste a rare wine, or ran into a celebrity on the street — but new research suggests that sharing these extraordinary experiences may come at a social cost. The findings are published in Psychological Science, a journal of the Association for Psychological Science. "Extraordinary experiences are pleasurable in the moment but can leave us socially worse off in the long run," says psychological scientist and study author Gus Cooney of Harvard University. ...

Children's future writing difficulties can be identified before they even learn how to begin writing, according to a new study by Professor Phaedra Royle and Postdoctoral fellow Alexandra Marquis of the University of Montreal's School of Speech Language Pathology and Audiology. The researchers are interested in oral language skills and their impact on grammar and spelling learning. Their work shows that oral language is a good predictor of writing difficulties. "The more children are able to use verb tense in spoken language, the more easily they can learn written language," ...

Researchers from UCL, Stanford Engineering, Google, Chalmers and Mozilla Research have built a new system that protects Internet users' privacy whilst increasing the flexibility for web developers to build web applications that combine data from different web sites, dramatically improving the safety of surfing the web. The system, 'Confinement with Origin Web Labels,' or COWL, works with Mozilla's Firefox and the open-source version of Google's Chrome web browsers and prevents malicious code in a web site from leaking sensitive information to unauthorised parties, whilst ...

Scientists have taken pictures of the BRCA2 protein for the first time, showing how it works to repair damaged DNA. Mutations in the gene that encodes BRCA2 are well known for raising the risk of breast cancer and other cancers. Although the protein was known to be involved in DNA repair, its shape and mechanism have been unclear, making it impossible to target with therapies. Researchers at Imperial College London and the Cancer Research UK London Research Institute purified the protein and used electron microscopy to reveal its structure and how it interacts with ...

An international collaboration of scientists has identified a fifth of the genetic factors that cause height to vary between individuals. A study which examined data on DNA from more than 250,000 people, published on October 6 in Nature Genetics, roughly doubles the number of known genome regions involved in height to more than 400. It also revealed that more than half of the factors involved in determining height are explained by simple common genetic variation - the sort of genetic variation that exists in more than 1 in 10 people. The collaboration, co led by the ...

Researchers at University of California, San Diego School of Medicine have discovered that T-cells – a type of white blood cell that learns to recognize and attack microbial pathogens – are activated by a pain receptor. The study, reported online Oct. 5 in Nature Immunology, shows that the receptor helps regulate intestinal inflammation in mice and that its activity can be manipulated, offering a potential new target for treating certain autoimmune disorders, such as Crohn's disease and possibly multiple sclerosis. "We have a new way to regulate T-cell activation ...

Experiments in mice with a bone disorder similar to that in women after menopause show that a scientifically overlooked group of cells are likely crucial to the process of bone loss caused by the disorder, according to Johns Hopkins researchers. Their discovery, they say, not only raises the research profile of the cells, called preosteoclasts, but also explains the success and activity of an experimental osteoporosis drug with promising results in phase III clinical trials. A summary of their work will be published on Oct. 5 in the journal Nature Medicine. "We didn't ...

The largest genome-wide association study (GWAS) to date, involving more than 300 institutions and more than 250,000 subjects, roughly doubles the number of known gene regions influencing height to more than 400. The study, from the international Genetic Investigation of Anthropometric Traits (GIANT) Consortium, provides a better glimpse at the biology of height and offers a model for investigating traits and diseases caused by many common gene changes acting together. Findings were published online October 5 by Nature Genetics. "Height is almost completely determined ...