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Science News Archive September 2009 - Page 12


Page 12 of 24

Intermittent preventive malaria treatment for African infants is safe and effective, but more long-acting drugs desperately needed

A recent study found that intermittent preventive malaria treatment in African infants is both safe and effective, with sulfadoxine-pyrimethamine providing protection for up to 6 weeks. However, the use of this drug is limited by potential resistance and its risks. New long-acting antimalarial drugs are urgently needed for this strategy.

SourceThe Lancet_DELETED·JournalThe Lancet·DateSep 16, 2009

Canadian scientists uncover a new mechanism regulating fetal growth and neonatal survival

Researchers have identified a critical role for protein kinase Erk3 in fetal growth potential and lung maturation, revealing the loss of this function leads to fetal growth restriction and early neonatal lethality. This finding provides new insights into intrauterine growth restriction and its associated risks.

SourceUniversity of Montreal·JournalProceedings of the National Academy of Sciences·DateSep 16, 2009

GPs' gut feelings defined

Researchers define 'gut feelings' experienced by GPs as two types: sense of alarm and reassurance. The former involves feeling uneasy about possible adverse outcomes, while the latter means feeling secure despite uncertainty. This definition aims to facilitate future research on the effectiveness of 'gut-compass'.

SourceBMC (BioMed Central)·JournalBMC Family Practice·DateSep 16, 2009

What are the risk factors for rebleeding after negative angiography?

A study published in the World Journal of Gastroenterology found that underlying malignancy, liver cirrhosis, and hematemesis are key predictors of rebleeding after negative angiographic findings. The research team analyzed 128 patients with acute non-variceal gastrointestinal bleeding who had negative initial angiography results.

SourceWorld Journal of Gastroenterology·JournalWorld Journal of Gastroenterology·DateSep 16, 2009

Depression care improved

Researchers found a simple intervention involving monthly follow-up phone calls improved depression care in primary practice. The trial evaluated 626 patients with depression, highlighting the potential of practice-based health care assistants to recognize and react to deteriorating symptoms.

SourceGoethe University Frankfurt·JournalAnnals of Internal Medicine·DateSep 16, 2009

Spelling B-Y-U with DNA

Researchers have created a new technology using DNA origami that can form tiny letters with multiple branching points, addressing the need for narrow features in nanoelectronics. The breakthrough could lead to the development of nanoscale devices with unprecedented capabilities.

SourceAmerican Chemical Society·JournalNano Letters·DateSep 16, 2009

How to spell B-Y-U with DNA

Researchers from Brigham Young University have successfully created a customized DNA origami technique to write the letters B-Y-U on an extremely small scale. This breakthrough enables the design of nanoscale shapes for electrical circuitry and the creation of inexpensive computer chips.

SourceBrigham Young University·JournalNano Letters·DateSep 16, 2009

Gut ecology in transplant patients

Researchers found that gut bacteria of transplant patients with an ileostomy opening were dominated by facultative anaerobes, while those without an ileostomy had strictly anaerobic populations. The study suggests the gut can have two stable bacterial ecosystems, one tolerant to oxygen and another not.

SourceUniversity of California - Davis·JournalProceedings of the National Academy of Sciences·DateSep 15, 2009

Mount Sinai researchers find phone assessment effective for evaluating cognition in the elderly

A new study by Mount Sinai researchers found that cognitive testing by telephone is as effective as in-person testing in evaluating cognition in elderly individuals. The study used well-established neuropsychological tests and involved 54 healthy women with an average age of 79.

SourceThe Mount Sinai Hospital / Mount Sinai School of Medicine·JournalInternational Journal of Geriatric Psychiatry·DateSep 15, 2009

New X-ray technique illuminates reactivity of environmental contaminants

Researchers have developed a new analytical method to quantify environmental contaminant reactions in real-time, enabling predictions of risks and transport. This breakthrough advances understanding of geochemical processes and has significant applications in environmental science, particularly for contaminants like arsenic.

SourceUniversity of Delaware·JournalProceedings of the National Academy of Sciences·DateSep 15, 2009

Comprehensive cardiac CT scan may give clearer picture of significant heart disease

A new computed-tomography-based protocol can identify coronary artery narrowing and myocardial ischemia simultaneously, improving diagnostic accuracy for clinically significant coronary artery disease. The study's results compare favorably to SPECT stress imaging and cardiac catheterization, with lower radiation doses.

SourceMassachusetts General Hospital·JournalJournal of the American College of Cardiology·DateSep 15, 2009

Treatment for severe respiratory failure from conditions like swine flu is better when ECMO is part of the treatment than with conventional ventilation

A study found that extracorporeal membrane oxygenation (ECMO) significantly improves survival rates and reduces disability in adults with severe acute respiratory failure. The treatment, which uses heart-lung bypass technology, was shown to be cost-effective compared to conventional ventilation.

SourceThe Lancet_DELETED·JournalThe Lancet·DateSep 15, 2009

Treating bone loss in breast cancer survivors

A Loyola University Health System study found that breast cancer patients can prevent bone loss by correcting secondary causes, such as vitamin D deficiency, and using bisphosphonate osteoporosis drugs. After one year, patients with secondary causes showed stable bone mineral density.

Friction force differences could offer a new means for sorting and assembling nanotubes

Researchers have discovered different friction forces when carbon nanotubes slide along their axis versus perpendicular to it, which could provide a new tool for assembling nanotubes into devices. The findings also offer insight into fundamental friction issues and potentially be used to sort nanotubes according to their chirality.

SourceGeorgia Institute of Technology·JournalNature Materials·DateSep 15, 2009