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Science News for October 27, 2008


It all adds up: Early achievement in math may identify future scientists and engineers

Researchers identified 1500 young adolescents with high math scores on the SAT and followed their careers. Those who scored highest in math went on to publish more scientific papers and earn patents in advanced degrees groups. High math achievement also predicted success among graduate students at top-ranked science universities.

SourceAssociation for Psychological Science·JournalPsychological Science·DateOct 27, 2008

Building the blood-brain barrier

Researchers have identified Wnt/b-catenin signaling as a key pathway regulating brain development and maintaining the integrity of the blood-brain barrier. The study suggests that tweaking this signaling pathway could potentially mend damaged blood-brain barriers in patients with stroke or other conditions.

SourceRockefeller University Press·JournalJournal of Cell Biology·DateOct 27, 2008

When you look at a face, you look nose first

UC San Diego computer scientists found that people first fixate on the left of the center of the nose and then the center of the nose to determine if a face is familiar. Looking at two spots, such as the nose and eye, does not improve recognition, but allows for better performance. Understanding how humans recognize faces may help crea...

SourceUniversity of California - San Diego·JournalPsychological Science·DateOct 27, 2008

In mice, anxiety is linked to immune system

A recent study has found that anxiety levels in mice are directly influenced by the immune system, specifically through mast cells. Mice without mast cells showed reduced willingness to navigate open and high spaces, indicating lower anxiety levels.

SourceRockefeller University·JournalProceedings of the National Academy of Sciences·DateOct 27, 2008

A face by any other name: Seeing racial bias

A new study suggests that racial bias affects face perception, with names significantly influencing how people see multiracial faces. Researchers used a study titled Barack Obama or Barry Dunham? to test the hypothesis that racially-suggestive names would influence participants' perception of identical multiracial faces.

SourceUniversity of New South Wales·JournalPerception·DateOct 27, 2008

Research challenges conventional notions about salmon survival

A new study challenged conventional notions about salmon survival, finding that juvenile salmon in two west coast rivers had similar survival rates despite the presence of extensive dam networks. The study used tagging and tracking technologies to track small juvenile Pacific salmon from freshwater to ocean destinations.

SourcePLOS·JournalPLOS Biology·DateOct 27, 2008

Gladstone scientists identify single microRNA that controls how heart chambers form

Researchers have identified a single microRNA, miR-138, critical to the development of heart chambers in zebrafish. This discovery may provide new approaches for treating congenital heart defects. The study showed that miR-138 regulates numerous gene functions and is required during a specific developmental window.

SourceGladstone Institutes·JournalProceedings of the National Academy of Sciences·DateOct 27, 2008

Brain stimulation improves dexterity

Researchers found that transcranial direct current stimulation (tDCS) can improve delicate task performance by 24%, outperforming single-hemisphere and sham treatments. The study used healthy volunteers to test the effects of dual-hemisphere tDCS, showing significant benefits for non-dominant hand skills.

SourceBMC (BioMed Central)·JournalBMC Neuroscience·DateOct 27, 2008

Seeing color in 'blindsight'

Researchers used transcranial magnetic stimulation to restore some experience of color in a patient with 'blindsight', a condition where people don't consciously see but can detect objects. The breakthrough suggests that even damaged parts of the brain, like V1, are not essential for visual awareness.

SourceCell Press·JournalCurrent Biology·DateOct 27, 2008

How drug companies covertly promote off-label drug use

Off-label prescription of a drug is generally legal, but promotion of off-label uses by drug manufacturers is illegal. Drug companies employ techniques such as the 'decoy indication' and using unlicensed representatives to promote off-label use, potentially putting patients at risk.

SourcePLOS·JournalPLOS Medicine·DateOct 27, 2008

Stress may make you itch

Researchers found that stress activates immune cells, which initiate and perpetuate skin diseases. Blocking specific proteins prevented the increase in white blood cells, suggesting a key role for ICAM-1/LFA-1 interactions.

SourceAmerican Journal of Pathology·JournalAmerican Journal Of Pathology·DateOct 27, 2008

New hormone data can predict menopause within a year

Researchers at the University of Michigan found that declines in anti-Mullerian hormone (AMH) and inhibin B concentrations predict the time to menopause, while changes in follicle-stimulating hormone (FSH) stages identify different reproductive periods. This information can help women understand their biological clock and fertility.

SourceUniversity of Michigan·JournalThe Journal of Clinical Endocrinology & Metabolism·DateOct 27, 2008

Similar survival rates for Pacific salmon in Fraser, Columbia Rivers raises new questions

A recent study found that some endangered Pacific salmon stocks are surviving as well as or better in rivers with hydroelectric dams as in those without. Researchers used acoustic telemetry technology to track juvenile salmon migration and survival rates in the Fraser and Columbia Rivers, revealing a surprising similarity between damme...

SourceUniversity of British Columbia·JournalPLOS Biology·DateOct 27, 2008

Statins associated with lower risk of death from pneumonia

A study found that individuals taking statins before hospitalization for pneumonia had a lower risk of death within 90 days, particularly among those older than 80 and with bacteremia. The benefits were seen primarily in the early phase of infection, suggesting that statin use is beneficial primarily in the initial stages of infection.

SourceJAMA Network·JournalArchives of Internal Medicine·DateOct 27, 2008

The mental health dangers of birth hypoxia

Research suggests that birth hypoxia may contribute to the development of schizophrenia by reducing brain-derived neurotrophic factor (BDNF) levels. The study found a significant decrease in BDNF among individuals who later developed schizophrenia, highlighting the importance of maternal health during pregnancy.

SourceElsevier·JournalBiological Psychiatry·DateOct 27, 2008

Are you phonagnosic?

A woman with phonagnosia, unable to recognize her daughter's voice on the phone, undergoes tests that reveal difficulties in recognizing famous actors' voices but not other sounds or music. The study suggests there may be more people with similar conditions, and researchers seek contact from potential sufferers.

SourceUniversity College London·JournalNeuropsychologia·DateOct 27, 2008

NIH awards Rutgers Cell and DNA Repository $57.8M

The Rutgers University Cell and DNA Repository has received two major NIH awards to support investigations into the genetics of mental disorders, metabolic diseases, and digestive health. The funds will enable researchers to study the genetic causes of complex diseases such as autism, bipolar disorder, and diabetes.

Meta-analysis examines cardiovascular effects of diabetes medications

A meta-analysis of 40 clinical trials found that metformin hydrochloride was associated with a decreased risk of cardiovascular mortality compared to other oral diabetes agents or placebo. However, the study did not find significant associations between other diabetes medications and beneficial or harmful cardiovascular effects.

SourceJAMA Network·JournalArchives of Internal Medicine·DateOct 27, 2008

New research on flu vaccination in PLoS Medicine

Two studies published in PLOS Medicine show that increasing flu vaccination rates can decrease the burden of influenza. A universal immunization program in Ontario led to reductions in flu-related deaths, hospitalizations, and emergency department visits compared to other provinces.

SourcePLOS·JournalPLOS Medicine·DateOct 27, 2008

Glutamate: Too much of a good thing in schizophrenia?

Researchers found that deleting the gene for glutamate transporter EAAT1 leads to increased responses to NMDA receptor antagonist MK-801, resulting in schizophrenia-like features in mice. The study suggests a promising new class of glutamate-targeting antipsychotic treatments may help correct these abnormalities.

SourceElsevier·JournalBiological Psychiatry·DateOct 27, 2008

Wildflower declines in Thoreau's Concord woods are due to climate changes

Researchers at Boston University and Harvard University have found that wildflowers in Thoreau's Concord woods are declining due to climate change. The study, which analyzed phylogenetic patterns of species loss, reveals that species with the ability to track short-term temperature changes have faired better under recent warming trends.

SourceBoston University·JournalProceedings of the National Academy of Sciences·DateOct 27, 2008

King Solomon's (copper) mines?

Archaeologists have uncovered evidence of ancient copper-production center at Khirbat en-Nahas, dating back to the 10th century BCE, pushing back archaeological chronology by three centuries. The discovery supports biblical narratives and raises questions about the historicity of King David and Solomon's rule.

SourceUniversity of California - San Diego·JournalProceedings of the National Academy of Sciences·DateOct 27, 2008

Scientists identify new gene responsible for puberty disorders

Researchers at Medical College of Georgia identified a new gene, chromodomain helicase DNA binding protein 7 (CHD7), responsible for some puberty disorders, including idiopathic hypogonadotropic hypogonadism (IHH) and Kallmann syndrome. The study found that CHD7 mutations account for about 6% of IHH and Kallmann syndrome cases.

SourceMedical College of Georgia at Augusta University·JournalAmerican Journal of Human Genetics·DateOct 27, 2008

Progress toward new storage media

Researchers have created reliable nanopatterns of a spin-transition compound on silicon oxide chips, paving the way for new molecular storage media. The development uses special unconventional micro- and nanolithographic techniques to print neutral iron(II) complexes onto silicon wafers in the form of fine lines.

SourceWiley·DateOct 27, 2008

American Society of Agronomy presents awards

The American Society of Agronomy has recognized five individuals with prestigious awards for their excellence in agronomic education, extension, and service. Lee Burras received the Agronomic Resident Education Award for his outstanding teaching skills, while William J. Cox was honored with the Agronomic Extension Education Award for h...

Catching quakes with laptops

The project uses laptops with built-in accelerometer chips to detect tremors, allowing for faster earthquake detection and more accurate location of strong motions. With many sensors, it's possible to provide several seconds of warning before an earthquake hits neighboring regions.

Diabetes treatment becomes more complex, costly

The study reveals that diabetes prescriptions increased, with more medications prescribed per patient and higher costs, from $6.7 billion in 2001 to $12.5 billion in 2007. Insulin use decreased, while the use of newer drugs like glitazones increased.

SourceJAMA Network·JournalArchives of Internal Medicine·DateOct 27, 2008

Effects of anesthesia on the heart

Researchers created a first-ever genetic animal model to study anesthetic agents' effects on individuals genetically predisposed to arrhythmia and sudden cardiac death. The study found that some anesthetics trigger arrhythmias, particularly in models with long QT syndrome.

New brain link as cause of schizophrenia

Researchers at Newcastle University have identified a key brain link that causes schizophrenia, revealing NMDA receptors play a critical role in modifying brain oscillations. Optimizing receptor function could lead to new treatment approaches for the mental illness, affecting one in 100 people.

SourceNewcastle University·JournalProceedings of the National Academy of Sciences·DateOct 27, 2008