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Science News Archive September 2011 - Page 19


Page 19 of 29

Primary schoolchildren can be great tutors

A trial of peer tutoring in Scotland's primary schools found that children as young as seven to eight years old can benefit from a twenty-minute weekly session. The boost to school pupils' attainment provided by peer tutoring was equivalent to about three months progress in both maths and reading.

SourceDurham University·JournalSchool Effectiveness and School Improvement·DateSep 13, 2011

A 3-D reconstructed image of neural dendritic trees using the advanced electron microscope technology

The study reveals that neurons normalize receiving signals by adjusting their morphological characteristics, making it easier to receive farther signals. The research team's 3D image reconstruction of minute dendritic tree morphology demonstrates the size and distance of dendritic trees determine signal clarity and strength.

SourceNational Institute for Physiological Sciences·JournalScientific Reports·DateSep 13, 2011

Breaching the blood-brain barrier

Researchers found that adenosine can modulate the entry of large molecules into the brain, establishing a gateway into the blood-brain barrier. They successfully transported large dextrans and antibodies into the brain using an FDA-approved drug, Lexiscan.

More evidence that spicing up broccoli boosts its cancer-fighting power

A new study from the University of Illinois found that pairing broccoli with spicy foods containing myrosinase significantly enhances its individual cancer-fighting power. This is achieved by ensuring absorption takes place in the upper digestive system, where sulforaphane can be quickly and effectively released.

Alley to receive Heinz award

Richard Alley, a leading climate researcher, is recognized for his groundbreaking work on abrupt climate change. His discovery that the last Ice Age ended in just three years has debunked the myth of slow climate change and highlights the need for urgent action.

Informed consent processes need local adaptation

Researchers from KEMRI-Wellcome Trust Programme in Kenya modified informed consent processes to consider local social, cultural, and economic contexts. Locally adapted communication processes strengthened informed consent, particularly in international research.

SourcePLOS·JournalPLOS Medicine·DateSep 13, 2011

Pituitary hormone TSH found to directly influence bone growth

A new study from Mount Sinai School of Medicine reveals that thyroid-stimulating hormone (TSH) directly influences bone growth, contrary to its usual thyroid functions. The findings suggest TSH may be a novel method for addressing bone production and could lead to innovative treatments for osteoporosis.

SourceThe Mount Sinai Hospital / Mount Sinai School of Medicine·JournalProceedings of the National Academy of Sciences·DateSep 13, 2011

Rebooting psychotherapy

Several prominent scientists respond to a call for rethinking the current approach to mental health care, highlighting innovative programs like those developed by the US Department of Veterans Affairs. The authors emphasize the need to reduce the burden of mental illness in the United States through improved treatment and accessibility.

SourceAssociation for Psychological Science·JournalPerspectives on Psychological Science·DateSep 13, 2011

New imaging technique evaluates nerve damage

A new imaging technique allows researchers to assess nerve damage and healing in live patients, providing a non-invasive method for diagnosing nerve injuries. The technique uses lasers to create images of individual neurons' insulating sheaths, revealing the extent of myelin loss and recovery.

SourceOptica·JournalBiomedical Optics Express·DateSep 13, 2011

Evaluating doctoral programs in African universities

A new evidence-based tool has been developed to evaluate doctoral programs in African universities, incorporating perspectives from students, staff, and policy makers. The tool aims to strengthen capacity and justify external funding inputs, benefiting universities across different countries.

SourcePLOS·JournalPLOS Medicine·DateSep 13, 2011

Evolution keeps sex determination flexible

Researchers at Michigan State University found that organisms quickly evolve ways to compensate for genetic and genomic disruptions in sex determination. The study used an experimental evolution approach to study adaptations in nematodes and showed that the mechanisms themselves are flexible and adaptable from an evolutionary viewpoint.

SourceMichigan State University·JournalEvolution·DateSep 12, 2011

Manipulative mothers subdue show-off sons

A team of evolutionary biologists found that when mothers control offspring sex ratios, sexual selection collapses, and males lose their elaborate courtship displays to attract females. This twist adds unexpected complexity to Darwin's theory of sexual selection, suggesting that motherly control can override the need for showy males.

SourceUniversity of Bristol·JournalProceedings of the National Academy of Sciences·DateSep 12, 2011

Study finds no link between intracerebral hemorrhage and statin use among patients with prior stroke

A retrospective study of 17,872 patients found no association between statin use and increased risk of intracerebral hemorrhage after ischemic stroke. The study's results contradict previous findings and suggest that current treatment guidelines recommending statin therapy for most patients with a history of ischemic stroke may be safe.

SourceJAMA Network·JournalArchives of Neurology·DateSep 12, 2011

New clues to molecular understanding of autism

A transgenic mouse model exhibiting behavioral parallels with humans diagnosed with autism spectrum disorder has improved scientific understanding and may lead to diagnostic tests based on biomarkers. The research could also help design targeted interventions and treatments.

SourceUniversity at Buffalo·JournalProceedings of the National Academy of Sciences·DateSep 12, 2011

Flu vaccines for nursing home workers effective in reducing outbreaks: study

A study found that flu vaccination rates among nursing home healthcare workers significantly reduced flu outbreaks, with a 87% decrease when 51-75% of staff were vaccinated. Higher resident vaccination rates surprisingly correlated with increased outbreak risk, highlighting the importance of vaccinating healthcare personnel.

SourceSociety for Healthcare Epidemiology of America·JournalInfection Control and Hospital Epidemiology·DateSep 12, 2011

Social contacts, self-confidence crucial to successful recovery through Alcoholics Anonymous

Researchers found that social networks and confidence in maintaining sobriety in social situations are key factors in successful recovery through AA. The study analyzed data from over 1,700 participants and showed that increased participation in AA during the first three months led to more successful recovery over the following year.

SourceMassachusetts General Hospital·JournalAddiction·DateSep 12, 2011

A deep male voice helps women remember

A study by David Smith and colleagues found that women's memory is sensitive to male voice pitch, a cue important for mate choice. Women preferred low pitch male voices and remembered objects more accurately when introduced by deep male voices.

SourceSpringer·JournalMemory & Cognition·DateSep 12, 2011