ScienceDaily: Latest Science News

---

• Memory formation triggered by stem cell development
• Bird brains follow the beat
• Diagnostic tool: Polymer film loaded with antibodies can capture tumor cells
• NASA pinning down where 'here' is better than ever
• The Many Moods of Titan
• Erosional origin of linear dunes on Earth and Saturn's moon Titan
• Alzheimer's, Parkinson's, certain cancers: Correct protein folding illuminated
• Trusting feelings when predicting future events: The emotional oracle effect
• Light-emitting nanocrystal diodes go ultraviolet
• In the genes, but which ones? Studies that linked specific genes to intelligence were largely wrong, experts say
• A biodiversity discovery that was waiting in the wings -- wasp wings, that is
• Neither birth nor death stops a flock, new theory shows
• The genetic basis for age-related macular degeneration (AMD)
• Cunning super-parasitic wasps sniff out protected aphids and overwhelm their defenses
• CFC substitutes: Good for the ozone layer, bad for climate?
• Female sex hormones can weaken the ability of fish to protect themselves against environmental toxins
• Car tracks beyond the asphalt
• Robot obeys to commands and gestures
• Novel method to make nanomaterials discovered
• Wireless bicycle brake, a prototype on an exciting mission
• New strategies for treatment of infectious diseases
• Inflammatory circuit that triggers breast cancer uncovered
• Novel bioactive peptides promote wound healing in vivo
• Are you making your spring allergies worse? Five things that can aggravate your suffering
• Cancer therapy more potent when it hits two targets, study suggests
• Mobile DNA elements can disrupt gene expression and cause biological variation, study shows
• Disarming the botulinum neurotoxin
• 90 percent of firefighters exhibit symptoms of PTSD, Israeli study suggests
• 'Storm of the century' may become 'storm of the decade'
• Investigation links deaths to paint-stripping chemical
• For fish, fear smells like sugar

Memory formation triggered by stem cell development Posted: 24 Feb 2012 12:27 PM PST Researchers have discovered an answer to the long-standing mystery of how brain cells can both remember new memories while also maintaining older ones.

Bird brains follow the beat Posted: 24 Feb 2012 12:27 PM PST By training birds to 'get rhythm', scientists uncover evidence that our capacity to move in time with music may be connected with our ability to learn speech.

Diagnostic tool: Polymer film loaded with antibodies can capture tumor cells Posted: 24 Feb 2012 12:27 PM PST The development of polymer film loaded with antibodies that can capture tumor cells shows promise as a diagnostic tool. Cancer cells that break free from a tumor and circulate through the bloodstream spread cancer to other parts of the body. But this process, called metastasis, is extremely difficult to monitor because the circulating tumor cells (CTCs) can account for as few as one in every billion blood cells.

NASA pinning down where 'here' is better than ever Posted: 24 Feb 2012 12:18 PM PST Before our Global Positioning System (GPS) navigation devices can tell us where we are, the satellites that make up the GPS need to know exactly where they are. For that, they rely on a network of sites that serve as "you are here" signs planted throughout the world. The catch is, the sites don't sit still because they're on a planet that isn't at rest, yet modern measurements require more and more accuracy in pinpointing where "here" is. To meet this need, NASA is helping to lead an international effort to upgrade the four systems that supply this crucial location information.

The Many Moods of Titan Posted: 24 Feb 2012 12:13 PM PST A set of recent papers, many of which draw on data from NASA's Cassini spacecraft, reveal new details in the emerging picture of how Saturn's moon Titan shifts with the seasons and even throughout the day. The papers show how this largest moon of Saturn is a cousin -- though a very peculiar cousin -- of Earth.

Erosional origin of linear dunes on Earth and Saturn's moon Titan Posted: 24 Feb 2012 11:06 AM PST Linear dunes, widespread on Earth and Saturn's moon, Titan, are generally considered to have been formed by deposits of windblown sand. It has been speculated for some time that some linear dunes may have formed by "wind-rift" erosion, but this model has commonly been rejected due to lack of sufficient evidence. Now, new research indicates that erosional origin models should not be ruled out.

Alzheimer's, Parkinson's, certain cancers: Correct protein folding illuminated Posted: 24 Feb 2012 11:05 AM PST Using the exceptionally bright and powerful X-ray beams of the Advanced Light Source, researchers have discovered a critical control element within chaperonin, the protein complex responsible for the correct folding of other proteins. The "misfolding" of proteins has been linked to many diseases, including Alzheimer's, Parkinson's and some forms of cancer.

Trusting feelings when predicting future events: The emotional oracle effect Posted: 24 Feb 2012 11:05 AM PST People with higher trust in their feelings were more likely to correctly predict a variety of future events. The researchers call this phenomenon the emotional oracle effect.

Light-emitting nanocrystal diodes go ultraviolet Posted: 24 Feb 2012 11:05 AM PST Scientists have developed a process for creating glass-based, inorganic light-emitting diodes that produce light in the ultraviolet range. The work is a step toward biomedical devices with active components made from nanostructured systems.

In the genes, but which ones? Studies that linked specific genes to intelligence were largely wrong, experts say Posted: 24 Feb 2012 11:05 AM PST For decades, scientists have understood that there is a genetic component to intelligence, but a new study has found both that most of the genes thought to be linked to the trait are probably not in fact related to it, and identifying intelligence's specific genetic roots may still be a long way off.

A biodiversity discovery that was waiting in the wings -- wasp wings, that is Posted: 24 Feb 2012 11:05 AM PST From spaghetti-like sea anemones to blobby jellyfish to filigreed oak trees, each species in nature is characterized by a unique size and shape. But the evolutionary changes that produce the seemingly limitless diversity of shapes and sizes of organisms on Earth largely remains a mystery. Nevertheless, a better understanding of how cells grow and enable organisms to assume their characteristic sizes and shapes could shed light on diseases that involve cell growth, including cancer and diabetes.

Neither birth nor death stops a flock, new theory shows Posted: 24 Feb 2012 08:11 AM PST Neither births nor deaths stop the flocking of organisms. They just keep moving, says a theoretical physicist. The notion, he says, has implications in biology and eventually could point to new cancer therapies.

The genetic basis for age-related macular degeneration (AMD) Posted: 24 Feb 2012 08:07 AM PST Age-related macular degeneration (AMD) is one of the leading causes of blindness worldwide, especially in developed countries, and there is currently no known treatment or cure or for the vast majority of AMD patients. New research has identified genes whose expression levels can identify people with AMD, as well as tell apart AMD subtypes. It is estimated that 6.5% of people over age 40 in the US currently have AMD. There is an inheritable genetic risk factor but risk is also increased for smokers and with exposure to UV light.

Cunning super-parasitic wasps sniff out protected aphids and overwhelm their defenses Posted: 24 Feb 2012 08:07 AM PST In the war between parasite and host, the parasitic wasp and the pea aphid are locked in a battle for survival. New research shows that this cunning parasite sniffs out differences between protected and unprotected aphids, and alters its egg-laying strategy, in order to overwhelm aphid defenses and ensure survival of wasp offspring. The wasp lays an egg inside the pea aphid, where  the egg hatches and converts the aphid's insides into a wasp nursery. The wasp larva uses the still-living aphid as a food source, eventually pupating inside the aphid and emerging as a fully-formed mature wasp. However the pea aphid is not defenseless. It is protected by a bacterial symbiont.

CFC substitutes: Good for the ozone layer, bad for climate? Posted: 24 Feb 2012 08:07 AM PST The Montreal Protocol led to a global phase-out of most substances that deplete the ozone layer, such as chlorofluorocarbons (CFCs). A happy side-effect of the gradual ban of these products is that the Earth's climate has also benefited because CFCs are also potent greenhouse gases. However, now a "rebound effect" threatens to accelerate the rate of global warming.

Female sex hormones can weaken the ability of fish to protect themselves against environmental toxins Posted: 24 Feb 2012 08:06 AM PST It is well known that female sex hormones (estrogens) that end up in rivers and lakes, primarily via spillage from sewers and livestock farming, pose a threat to the environment. Some environmental toxins can also have the same impact as estrogens. One example of such substances are degradation products (metabolites) from the pollutant PCB.

Car tracks beyond the asphalt Posted: 24 Feb 2012 08:06 AM PST The contamination caused by road traffic not only affects the air, it also seeps under the asphalt and harms the adjacent soil and plants. A chemist has delved into the subject and studied the extent of the impact of the metals emitted by cars. Likewise, he has analyzed their consequences in the short, medium and long term.

Robot obeys to commands and gestures Posted: 24 Feb 2012 08:06 AM PST A robot helping in the household no longer is a dream of the future. ARMAR, the humanoid robot, can understand commands and execute them independently. For instance, it gets the milk out of the fridge. Thanks to cameras and sensors, it orients itself in the room, recognizes objects, and grasps them with the necessary sensitivity. Additionally, it reacts to gestures and learns by watching a human colleague how to empty a dishwasher or clean the counter. Thus, it adapts naturally to our environment.

Novel method to make nanomaterials discovered Posted: 24 Feb 2012 08:06 AM PST Researchers have discovered a novel way to make nanomaterials. Using computer simulations, the researchers have been able to predict that long and narrow graphene nanoribbons can be rolled into carbon nanotubes by means of twisting.

Wireless bicycle brake, a prototype on an exciting mission Posted: 24 Feb 2012 08:05 AM PST At this time, wireless networks are able to brake just one bike, but in the future, the technical elements will be further developed to regulate entire trains as they travel over the lines. In view of this, computer scientists are designing mathematical calculations to check such systems automatically.

New strategies for treatment of infectious diseases Posted: 24 Feb 2012 08:05 AM PST The immune system protects from infections by detecting and eliminating invading pathogens. These two strategies form the basis of conventional clinical approaches in the fight against infectious diseases. Scientists now propose that a third strategy needs to be considered: tolerance to infection, whereby the infected host protects itself from infection by reducing tissue damage and other negative effects caused by the pathogen or the immune response against the invader.

Inflammatory circuit that triggers breast cancer uncovered Posted: 24 Feb 2012 08:05 AM PST Although it's widely accepted that inflammation is a critical underlying factor in a range of diseases, including the progression of cancer, little is known about its role when normal cells become tumor cells. Now, scientists have shed new light on exactly how the activation of a pair of inflammatory signaling pathways leads to the transformation of normal breast cells to cancer cells.

Novel bioactive peptides promote wound healing in vivo Posted: 24 Feb 2012 08:03 AM PST Researchers have combined bioactive peptides to stimulate wound healing. The peptides act by stimulating the growth of new blood vessels and promoting re-growth of tissue. Further development of these peptides could lead to a treatment for chronic and acute wounds.

Are you making your spring allergies worse? Five things that can aggravate your suffering Posted: 24 Feb 2012 08:03 AM PST Read about the five things you might be doing that are actually making your spring allergy symptoms worse.

Cancer therapy more potent when it hits two targets, study suggests Posted: 24 Feb 2012 08:03 AM PST Simultaneous targeting of two different molecules in cancer is an effective way to shrink tumors, block invasion, and stop metastasis, scientists have found -— work that may improve the effectiveness of combination treatments that include drugs like Avastin.

Mobile DNA elements can disrupt gene expression and cause biological variation, study shows Posted: 23 Feb 2012 03:26 PM PST The many short pieces of mobile DNA that exist in the genome can contribute to important biological differences between strains of mice, according to a new study. The mobile DNA, sometimes called jumping genes, can disrupt gene expression even from a distance, with the disruption influenced by the gender of the parent that supplied it. The findings reveal a mechanism of natural variation in animals and humans that may apply to cancer and other diseases.

Disarming the botulinum neurotoxin Posted: 23 Feb 2012 11:26 AM PST Researchers have discovered how botulinum neurotoxin, a potential bioterrorism agent, survives the hostile environment in the stomach on its journey through the human body. Their study reveals the first 3D structure of a neurotoxin together with its bodyguard, a protein made simultaneously in the same bacterium. This new information reveals the toxin's weak spot -- a point in the journey that can be targeted with new therapeutics.

90 percent of firefighters exhibit symptoms of PTSD, Israeli study suggests Posted: 23 Feb 2012 10:33 AM PST A new study on the prevalence of Post Traumatic Stress Disorder (PTSD) among firefighters in Israel indicates that approximately 90 percent show some form of full or partial symptoms.

'Storm of the century' may become 'storm of the decade' Posted: 23 Feb 2012 10:32 AM PST Researchers report that projected increases in sea level and storm intensity brought on by climate change would make devastating storm surges -- the deadly and destructive mass of water pushed inland by large storms -- more frequent in low-lying coastal areas. Regions such as the New York City metropolitan area that currently experience a disastrous flood every century could instead become submerged every one or two decades.

Investigation links deaths to paint-stripping chemical Posted: 23 Feb 2012 10:32 AM PST The deaths of at least 13 workers who were refinishing bathtubs have been linked to a chemical used in products to strip surfaces of paint and other finishes. An investigation started by researchers in 2011 has found that 13 deaths since 2000 involved the use of paint-stripping products containing methylene chloride, a toxic chemical widely used as a de-greaser and paint stripper.

For fish, fear smells like sugar Posted: 23 Feb 2012 10:30 AM PST When one fish gets injured, the rest of the school takes off in fear, tipped off by a mysterious substance known as "Schreckstoff" (meaning "scary stuff" in German). Now, researchers have figured out what that scary stuff is really made of.

You are subscribed to email updates from ScienceDaily: Latest Science News To stop receiving these emails, you may unsubscribe now.	Email delivery powered by Google
Google Inc., 20 West Kinzie, Chicago IL USA 60610