Friday, June 26, 2009

ScienceDaily: Latest Science News

ScienceDaily: Latest Science News


Milky Way's Particle Accelerators: Cosmic Rays Accelerated In Remnants Of Exploding Stars

Posted: 26 Jun 2009 11:00 AM PDT

Astronomers have now solved a long-standing mystery of the Milky Way's particle accelerators. They show that cosmic rays from our galaxy are very efficiently accelerated in the remnants of exploded stars.

Engineering Autism: Mice With Extra Chromosome Region Show Many Autistic Signs

Posted: 26 Jun 2009 11:00 AM PDT

Mice who inherit a particular chromosomal duplication from their fathers show many behaviors associated with human autism, researchers report. The duplicated chromosomal region in mice is the equivalent of human chromosome 15q11-13, the most frequent cytogenetic abnormality observed in autism, accounting for some five percent of all cases.

From The Glass To The Brain In Six Minutes

Posted: 26 Jun 2009 11:00 AM PDT

Just one drink can quickly go to your head. Researchers tested this well-known adage. Only six minutes after consuming an amount of alcohol equivalent to three glasses of beer or two glasses of wine, leading to a blood alcohol level of 0.05 to 0.06 percent, changes have already taken place in the brain cells, as the scientists have now shown using magnetic resonance spectroscopy.

Protein That Protects Sperm, Reduces Miscarriage Rates Identified

Posted: 26 Jun 2009 11:00 AM PDT

Researchers have identified a protein that helps protect immature mouse sperm from oxidative stress. When male mice over one year old lacking this protein were mated with normal female mice, an increased incidence of miscarriages and fetal developmental defects were observed. These data have clinical relevance, as age-related DNA damage to human sperm is associated with decreased fertility and increased rates of miscarriage and childhood disease.

Fuzzy Dampers Could Make Cars Quieter

Posted: 26 Jun 2009 11:00 AM PDT

New research could offer a solution to one of the most annoying sounds on our roads -- brake squeal. There are lots of mechanical myths about what causes a car's brakes to produce that biting howl. The all too familiar piercing squeal is heard at road junctions and traffic lights the world over as drivers hit the brakes. But, understanding what causes brake squeal might help researchers find a way to stop it.

In 'Reading' A Gaze, What We Believe Changes What We See

Posted: 26 Jun 2009 11:00 AM PDT

In primates including ourselves, the ability to register where others are looking is key in social circles. And, according to a new report, the way our brains process gaze-direction is much more sophisticated than a simple eyes-right vs. eyes-left.

New Fossil Tells How Piranhas Got Their Teeth

Posted: 26 Jun 2009 08:00 AM PDT

Previously unknown fossil fish bridges the evolutionary gap between flesh-eating piranhas and their plant-eating cousins.

Fish Protein Link To Controlling High Blood Pressure

Posted: 26 Jun 2009 08:00 AM PDT

Medical scientists are investigating how a species of fish from the Pacific Ocean could help provide answers to tackling chronic conditions such as hereditary high blood pressure and kidney disease. They are examining whether the Goby fish can help researchers locate genes linked to high blood pressure. This is because a protein called Urotensin II, first identified in the fish, is important for regulating blood pressure in all vertebrates- from fish to humans.

Chemical In Blood May Explain Susceptibility To Bladder Pain

Posted: 26 Jun 2009 08:00 AM PDT

A marker in the blood of both cats and humans that was identified in a recent study might signal both species' susceptibility for a painful bladder disorder called interstitial cystitis, a condition that is often difficult to diagnose.

Unique Portion Of Enzyme Fights Lung Infection

Posted: 26 Jun 2009 08:00 AM PDT

An enzyme known to play a key role in the development of emphysema serves as the first line of defense against bacterial infection of the lung, according to researchers. They also found that the antimicrobial activity comes from a small portion of the enzyme that is structurally and sequentially unique in nature.

Roadsters Embrace Green Racing

Posted: 26 Jun 2009 08:00 AM PDT

Green racing is now part of the American Le Mans series. It's auto racing where the prize goes to the fastest car with the smallest environmental footprint. But being green does not mean being slow; green race cars are still 200 mph+ cars. The hope is that the concept will lead to more energy-efficient cars for consumers.

Cognitive Therapy Is Of No Value In Schizophrenia, Analysis Of Studies Suggests

Posted: 26 Jun 2009 08:00 AM PDT

New research concludes that cognitive behavioral therapy is of no value in schizophrenia and has limited effect on depression.

Like Burrs On Your Clothes, Molecule-size Capsules Can Deliver Drugs By Sticking To Targeted Cells

Posted: 26 Jun 2009 05:00 AM PDT

It is now possible to engineer tiny containers the size of a virus to deliver drugs and other materials with almost 100 percent efficiency to targeted cells in the bloodstream.

Melanopsin And Sleep Modulation: A Bright Future For Light Therapy?

Posted: 26 Jun 2009 05:00 AM PDT

Light strongly influences human physiology and notably sleep regulation. Scientists have just published a detailed study on the role of melanopsin, a molecule involved in mediating the effects of light on sleep. These scientists also revealed evidence of new interactions between the different mechanisms acting on the duration and quality of sleep and alertness.

Gene Evolution Process Discovered

Posted: 26 Jun 2009 05:00 AM PDT

One of the mechanisms governing how our physical features and behavioral traits have evolved over centuries has been discovered.

Second Chance For Dangerous T-cells

Posted: 26 Jun 2009 05:00 AM PDT

Any of the immune system's T-cells that could attack the body's own tissue are either driven to cell death or reeducated to become a kind of law enforcer that could actually be used in therapies. Which of these alternatives occurs may depend on the age of the cells, according to new research.

Virus Filters For Medical Diagnosis

Posted: 26 Jun 2009 05:00 AM PDT

In biomedicine and biotechnology the smallest, complex, compound sample quantities must be reliably processed. Microsystems with new mechanisms of action for pumping, filtering and separating will manage this task with great efficiency in the future.

Online Ethics And The Bloggers' Code Revealed

Posted: 26 Jun 2009 05:00 AM PDT

Whatever their reason for posting their thoughts online, bloggers have a shared ethical code, according to a recent study. Key issues in the blogosphere are telling the truth, accountability, minimizing harm and attribution, although the extent to which bloggers follow their own ethical ideals can depend on the context and intended audience.

Stem Cells Created From Pigs' Connective Tissue Cells

Posted: 26 Jun 2009 02:00 AM PDT

Scientists have developed the ability to take regular cells from a pig's connective tissues, known as fibroblasts, and transform them into stem cells, eliminating several of the hurdles associated with stem cell research.

Gene Findings Revealing Reasons For Neuroblastoma Risk

Posted: 26 Jun 2009 02:00 AM PDT

Two new studies advance the search for genetic events that result in neuroblastoma, a puzzling, often-deadly type of childhood cancer. Scientists performed a genome-wide association study to discover that common variants in the gene BARD1 increase a child's susceptibility to a high-risk form of neuroblastoma.

New Images May Improve Vaccine Design For Deadly Rotavirus

Posted: 26 Jun 2009 02:00 AM PDT

Researchers are reporting the first detailed molecular snapshots of a deadly gastrointestinal virus as it is caught in the grasp of an immune system molecule with the capacity to destroy it. The images could help scientists design a more effective vaccine against rotavirus, a lethal infection that kills more than 500,000 children worldwide each year.

Therapeutic Delivery Of A Gene To Dysfunctional Nerves

Posted: 26 Jun 2009 02:00 AM PDT

In many sensory neuronopathies, painful conditions affecting sensory nerves outside the brain and spinal cord, the affected nerves are in a region known as the DRG. These conditions are difficult to treat. However, researchers have now developed an approach to target therapeutic genes to DRG nerves, and used it to reduce sensory nerve dysfunction in a mouse model of Sandhoff disease, an inherited condition in which many nerves, including those in the DRG, are affected.

Global Sunscreen Won't Save Corals

Posted: 26 Jun 2009 02:00 AM PDT

Emergency plans to counteract global warming by artificially shading the Earth from incoming sunlight might lower the planet's temperature a few degrees, but such "geoengineering" solutions would do little to stop the acidification of the world oceans that threatens coral reefs and other marine life, report the authors of a new study. The culprit is atmospheric carbon dioxide, which even in a cooler globe will continue to be absorbed by seawater, creating acidic conditions.

Experts: Big Tobacco Dead By 2047, Possibly Sooner

Posted: 26 Jun 2009 02:00 AM PDT

President Barack Obama's signature on a bill this week to grant the US Food and Drug Administration regulatory authority over tobacco was historic, and represents a step in the march to eliminate tobacco use in this country by 2047, two national tobacco experts said today.

Climate Change: Some Winds Decreasing Across United States

Posted: 25 Jun 2009 11:00 PM PDT

Researchers have found that wind speeds across the U.S. have decreased by an average of .5 percent to 1 percent per year since 1973. Declining wind speeds in parts of the United States could impact more than the wind power industry, say climate researchers.

New Nanoparticles Could Revolutionize Therapeutic Drug Discovery

Posted: 25 Jun 2009 11:00 PM PDT

A revolutionary new protein stabilization technique has been developed which could lead to 30 per cent more proteins being available as potential targets for drug development - opening up exciting possibilities in drug discovery.

Flexible Solar Strips Light Up Campus Bus Shelter

Posted: 25 Jun 2009 11:00 PM PDT

Engineering researchers in Canada have developed a tiling technique to create flexible solar cell panels. It is being tested on the curved roof of a campus bus shelter to power interior lighting.

Genomic Discovery: Protecting Kidney Function During Heart Failure

Posted: 25 Jun 2009 11:00 PM PDT

Cardiology researchers have found a peptide that helps preserve and improve kidney function during heart failure, without affecting blood pressure.

New Piece Found In The Puzzle Of Epigenetics: Mechanism Of Fine Regulation Of RNA Synthesis Elucidated

Posted: 25 Jun 2009 11:00 PM PDT

Scientists have identified the enzyme TFIIH kinase as an important factor in the epigenetic regulation of the cell nucleus enzyme RNA polymerase II. The findings constitute a further building block for understanding the pathomechanisms of cancer and other diseases.

Partner Issues Significantly Influence Women's Sexual Activity In Later Years, Study Shows

Posted: 25 Jun 2009 11:00 PM PDT

As a woman gets older, physical problems are less likely to influence whether she is sexually active than her partner's health or interest in sex, according to a new study.

Ancient Climate Change: When Palm Trees Gave Way To Spruce Trees

Posted: 25 Jun 2009 08:00 PM PDT

One long-standing climate puzzle relates to the Late Eocene and Early Oligocene. Profound changes were underway. Globally, carbon dioxide levels were falling and the hothouse warmth of the dinosaur age and Eocene Period was waning. In Antarctica, ice sheets had formed and covered much of the southern polar continent. But what exactly was happening on land, in northern latitudes?

New And Efficient Breast Biopsy Technique Developed

Posted: 25 Jun 2009 08:00 PM PDT

Researchers have developed a new breast biopsy technique that could lead to decreased procedure times, and reduced patient discomfort and morbidity, according to a new study. The new technique uses a mechanical arm to guide the needle for the biopsy, and has a braking system to allow for accurate placement of the needle and to avoid needle motion.

Concrete Creep Slowed: Work Paves Way For Lightweight, Vastly More Durable Infrastructure

Posted: 25 Jun 2009 08:00 PM PDT

Civil engineers have for the first time identified what causes the most frequently used building material on earth -- concrete -- to gradually deform, decreasing its durability and shortening the lifespan of infrastructures such as bridges and nuclear waste containment vessels.

Hodgkin Lymphoma Survivors Have Increased Risk Of Stroke And Transient Ischemic Attack

Posted: 25 Jun 2009 08:00 PM PDT

Patients treated for Hodgkin lymphoma with radiation therapy have a substantially higher risk of stroke, according to a new study.

New Java Programming Tools Employs Human-centered Design Techniques

Posted: 25 Jun 2009 08:00 PM PDT

Researchers have developed two new tools to help computer programmers select from among thousands of options within the application programming interfaces that are used to write applications in Java, today's most popular programming language.

Changes In Brain Architecture May Be Driven By Different Cognitive Challenges

Posted: 25 Jun 2009 08:00 PM PDT

Scientists trying to understand how the brains of animals evolve have found that evolutionary changes in brain structure reflect the types of social interactions and environmental stimuli different species face.

Evolution Of A Contraceptive For Invasive Sea Lamprey

Posted: 25 Jun 2009 05:00 PM PDT

In addition to providing fundamental insights into the early evolution of the estrogen receptor, new research may lead to a contraceptive for female lampreys -- a jawless fish considered an invasive pest species in the Great Lakes region of the United States. This could prove important to the Great Lakes region, where lampreys aggressively consume trout, salmon, sturgeon and other game fish.

Human Neurodegenerative Disorder Observed In Fruit Flies

Posted: 25 Jun 2009 05:00 PM PDT

Scientists have created a genetically modified fruit fly that mimics key features of Charcot-Marie-Tooth disease, a common neurodegenerative disorder that strikes about one out of every 2,500 people in the United States.

Visualizing Formation Of A New Synapse

Posted: 25 Jun 2009 05:00 PM PDT

A protein called neuroligin that is implicated in some forms of autism is critical to the construction of a working synapse, locking neurons together like "molecular Velcro," a new study has found.

Promising Biomarker And Candidate Tumor Suppressor Gene Identified For Colorectal Cancer

Posted: 25 Jun 2009 05:00 PM PDT

Researchers have identified a new candidate tumor suppressor gene in colorectal cancer and examined its use as a potential biomarker in stool samples, according to a new study.

Insights Into How Climate Change Might Impact Species' Geographic Ranges

Posted: 25 Jun 2009 05:00 PM PDT

A new study offers interesting insights into how species may, or may not, change their geographic range (the place where they live on earth) under climate change.

Patriotic Music May Close Minds, Children's Music May Open Them

Posted: 25 Jun 2009 05:00 PM PDT

The words to "Itsy Bitsy Spider" tell a simple story about an arachnid and a spout, but simply recalling the lines could initiate an unintentional attitude. That's the focus of new research into the behaviors elicited from the musical lyrics of common songs.

Artificial Liver For Drug Tests

Posted: 25 Jun 2009 02:00 PM PDT

The liver is one of the most important metabolizing organs in humans. Researchers have developed a model of the liver, which is viable outside the body and which is suitable for testing drugs.

Effective Pain Treatment For Cancer Patients?

Posted: 25 Jun 2009 02:00 PM PDT

Cancer patients often suffer from severe pain that cannot be effectively treated with conventional medication. Researchers have found the possible reasons for this -- tumors release two signal substances that make nerve cells especially sensitive and enhance tumor growth. In animal tests, when the researchers blocked the effect of the signal substances on the nerve cells, the sensitivity of the nerve cells and tumor growth were reduced.

Exposure To Phthalates May Be A Risk Factor For Low Birth Weight In Infants

Posted: 25 Jun 2009 02:00 PM PDT

Many parents worry about their child's exposure to phthalates, the chemical compounds used as plasticizers in a wide variety of personal care products, children's toys and medical devices. Phthalate exposure can begin in the womb, and has been associated with negative changes in endocrine function. A new study examines the possibility that in utero phthalate exposure contributes to low birth weight in infants.

Could Older Population Have Enough Exposure To Past H1N1 Flu Strains To Avoid Infection?

Posted: 25 Jun 2009 02:00 PM PDT

The outbreak of H1N1 in 1977 may have an impact on this pandemic. In the late 1970s, an influenza H1N1 appeared in humans. It had a pandemic-like spread that began in younger aged individuals.

Lasers Can Lengthen Quantum Bit Memory By 1,000 Times

Posted: 25 Jun 2009 02:00 PM PDT

Physicists have found a way to drastically prolong the shelf life of quantum bits, the 0s and 1s of quantum computers.

Childhood Physical Abuse Linked To Cancer

Posted: 25 Jun 2009 02:00 PM PDT

Childhood physical abuse is associated with elevated rates of cancer in adulthood, according to a new study.

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