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Science News Archive March 2010 - Page 2


Page 2 of 27

Researchers design self-test for memory disorders

Researchers developed a self-administered test to screen for early dementia, detecting 80% of mild cognitive impairments. The Self-Administered Gerocognitive Examination (SAGE) can help identify individuals with Alzheimer's disease at an early stage, improving treatment outcomes.

SourceOhio State University·JournalAlzheimer Disease & Associated Disorders·DateMar 31, 2010

More than 1/4 of elderly patients lack decision-making capacity at death

A study of 3,746 elderly Americans found that over one-fourth lacked the capacity to make end-of-life medical decisions. Those with advance directives, however, received care in line with their wishes most of the time. The study emphasizes the importance of preparing oneself and family for complex medical decisions at the end of life.

SourceMichigan Medicine - University of Michigan·JournalNew England Journal of Medicine·DateMar 31, 2010

Motivation by anticipation: Expecting rapid feedback enhances performance

A recent study published in Psychological Science found that students who expected to receive grades quickly performed better than those who anticipated delays. This counterintuitive result may be due to the threat of disappointment being more prominent for early expectants, leading them to perform better as a result. The study has imp...

SourceAssociation for Psychological Science·JournalPsychological Science·DateMar 30, 2010

Researchers harness the power of plants to fight hemophilia

A new plant-based system has been developed to help hemophilia patients build tolerance to their treatment, reducing the risk of allergic reactions. The system, made from genetically modified plants, can be ingested and releases a tolerated protein into the small intestine, where it can be acted on by the immune system.

SourceUniversity of Florida·JournalProceedings of the National Academy of Sciences·DateMar 30, 2010

Madagascar's mouse lemurs and more

A comprehensive study of mouse lemurs in Madagascar has identified a high diversity of population-level lineages, challenging traditional methods of species delimitation. The research uses multiple lines of evidence to recognize lineage diversity and presents the most thoroughly sampled species delimitation of mouse lemur ever performed.

SourcePLOS·JournalPLOS ONE·DateMar 30, 2010

A predilection for certain symmetries

Materials with 7-fold rotation symmetry have not yet been observed in nature, but researchers have discovered the reason why. The density of flower-shaped nuclei plays a crucial role in determining the rotation symmetry of colloidal particles, explaining why materials with certain symmetries are rare in nature.

SourceMax-Planck-Gesellschaft·JournalProceedings of the National Academy of Sciences·DateMar 30, 2010

Genes under control

Max Planck scientists have successfully inserted a gene switch into the genetic material of chloroplasts in plant cells, allowing for controlled protein production. This breakthrough enables researchers to study the functions of chloroplasts and explore potential applications in biotechnology, such as producing antibiotics.

SourceMax-Planck-Gesellschaft·JournalProceedings of the National Academy of Sciences·DateMar 30, 2010

Hormone replacement in joint fluid has potential regenerative effect

Researchers found that hormone replacement therapy in joint fluid may be beneficial for treating late-stage human osteoarthritis by regenerating damaged cartilage tissue. Estrogen and testosterone were shown to influence the expression of genes in chondrogenic progenitor cells, which are present in arthritic tissue.

SourceWiley·JournalArthritis & Rheumatism·DateMar 30, 2010

Mount Sinai finds meta-cognitive therapy more effective for adult ADHD patients

Researchers at Mount Sinai Hospital found that meta-cognitive therapy significantly improved symptoms of attention deficit hyperactivity disorder (ADHD) in adults compared to supportive therapy. The study, published in the American Journal of Psychiatry, demonstrated the efficacy of a non-medication treatment for adult ADHD.

SourceThe Mount Sinai Hospital / Mount Sinai School of Medicine·JournalAmerican Journal of Psychiatry·DateMar 30, 2010

Researcher modernizes US power grid

High-temperature superconducting wires can transmit up to 10 times more power than traditional copper cables without significant losses. This technology has the potential to revolutionize electricity generation, transmission, and use, reducing carbon emissions and offsetting the emission of equivalent conventional power plants.

Bile sends mixed signals to E. coli

Bile helps E. coli O157:H7 bacteria survive by increasing iron uptake, while reducing attachment to host cells in the large intestine. This study could lead to better protection of food from contamination and a deeper understanding of bacterial disease mechanisms.

St. John's wort collection mined for its medicinal value

A unique St. John's wort collection curated by ARS scientists provides university collaborators with genetically diverse sources of the herb to study its medicinal potential. Researchers are screening the collection for biologically active compounds that may combat viral infections, reduce inflammation, or improve digestive health.

Toads' earthquake exodus

Researchers found that toad populations in Italy shifted their behavior from breeding to evacuation mode five days before a significant earthquake. The ionosphere disruptions detected pre-seismic cues like radon gas releases and charged particles, allowing the toads to detect earthquakes earlier.

SourceZoological Society of London·JournalJournal of Zoology·DateMar 30, 2010

Essential oils to fight superbugs

Researchers found that thyme essential oil can almost completely eliminate bacteria within 60 minutes, with high efficacy against Staphylococcus species. The study suggests that essential oils could be a cheap and effective alternative to antibiotics, reducing the risk of new strains of antibiotic-resistant micro-organisms.

Exploration in toddlers activated by fathers

A new study published in Early Child Development and Care reveals that fathers tend to give toddlers more leeway, allowing them to actively explore their environments. This 'activation theory' suggests that father-child interaction plays a crucial role in shaping a child's development.

SourceUniversity of Montreal·JournalEarly Child Development and Care·DateMar 30, 2010

Ancient snakes living on Madagascar

Scientists have found that blindsnakes, a group of worm-like snakes, are one of the few organisms that inhabited Madagascar when it separated from India 100 million years ago. The study reveals that continental drift played a crucial role in their evolution, with populations separating as continents moved apart.

SourcePenn State·JournalBiology Letters·DateMar 30, 2010

The pill for ovarian cysts

A study found that women taking oral contraceptive pills had significantly fewer recurring ovarian cysts after surgery. Long-term treatment appears to be key to preventing endometrioma recurrence, suggesting a change in clinical practice.

SourceFaculty of 1000·JournalFertility and Sterility·DateMar 30, 2010

Predictors of loss of hepatitis B surface antigen in patients co-infected with HIV and HBV

A study analyzed factors associated with HBsAg loss in HIV-HBV co-infected patients. Higher baseline CD4 cell counts were linked to increased loss of HBsAg, suggesting effective T-cell response against HBV. The research contributes to understanding predictors of HBsAg loss and its implications for management.

SourceWorld Journal of Gastroenterology·JournalWorld Journal of Gastroenterology·DateMar 30, 2010

Do words hurt?

Researchers at Jena University found that verbal stimuli can activate the pain matrix in the brain, activating areas that process pain. The study used functional magnetic resonance tomography (fMRT) to investigate how healthy subjects process words associated with experiencing pain.