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Science News for April 17, 2012


Tai Chi wheelchair brings mobility, self-esteem, better health to practitioners

A new 13-posture Tai Chi designed for wheelchair users has been developed to promote mobility, self-esteem and overall health. The program was featured in the 2008 Beijing Olympics and has shown benefits for individuals with disabilities, including lower back and hip movements, upper body mobility and internal circulation.

SourceUniversity of South Florida (USF Health)·JournalJournal of Technology and Innovation·DateApr 17, 2012

Excessive weight gain during pregnancy a predictor for above-average birth weight

Researchers found that mothers who exceeded gestational weight gain recommendations were more likely to have children born larger than average for gestational age. The study suggests that addressing weight gain during pregnancy can reduce the risk of complications for both mother and baby.

SourceChildren's Hospital of Eastern Ontario Research Institute·JournalThe Journal of Maternal-Fetal & Neonatal Medicine·DateApr 17, 2012

Nanotube electrodes improve solar cells

Researchers have discovered a low-cost, efficient alternative to silicon-based solar cells using nanotube electrodes in dye-sensitized solar cells. The single-wall nanotube arrays show high electroactivity and potential for cheaper production than platinum, leading to improved efficiency and robustness.

SourceRice University·JournalScientific Reports·DateApr 17, 2012

Genetically modified corn affects its symbiotic relationship with non-target soil organisms

Researchers found genetically modified Bt corn has lower colonization of arbuscular mycorrhizal fungal roots compared to non-Bt corn, but no impact on root biomass or shoot growth. This study contributes to understanding the effects of GM crops on non-target soil organisms and highlights the need for further research.

SourceBotanical Society of America·JournalAmerican Journal of Botany·DateApr 17, 2012

Using math to feed the world

Researchers at University of Nottingham use math to study gibberellin hormone affecting plant growth, identifying key interactions between feedback loops. This work aims to improve crop varieties and address global food security concerns.

SourceUniversity of Nottingham·JournalProceedings of the National Academy of Sciences·DateApr 17, 2012

Better methods and estimates of infectious disease burden

A new study uses a pathogen-based incidence approach to generate infectious disease burden estimates in Europe, attributing morbidity to specific pathogens. The methodology has limitations but shows the need for further research and integration of demographic changes and infection dynamics.

SourcePLOS·JournalPLOS Medicine·DateApr 17, 2012

Long-term exposure to air pollution increases risk of hospitalization for lung, heart disease

A new study by Harvard researchers found a significant association between long-term fine particle air pollution exposure and higher rates of hospital admissions for pneumonia, heart attacks, strokes, and diabetes in older adults. The study used novel prediction models to estimate zip code concentrations of fine air particles and compa...

Orangutan nest building shows high degree of sophistication

A new study by researchers at the University of Manchester found that orangutans build nests with a high degree of sophistication, using strong branches for structural parts and weaker ones for linings. The apes' choice of branch was dictated by its diameter and rigidity, indicating possible knowledge of mechanical properties.

SourceUniversity of Manchester·JournalProceedings of the National Academy of Sciences·DateApr 17, 2012

Depression may lead mothers to wake babies

Research found that depressed mothers are more likely to excessively worry about their infants' nighttime behavior and spend more time with them, leading to increased night waking in the infants. Mothers with high depressive symptoms were also more likely to seek out their babies at night, despite the infant not appearing distressed.

SourcePenn State·JournalChild Development·DateApr 17, 2012

Institute of Physics: Medical schools should consider restoring the requirement for applicants to hold 'A' level or equivalent qualifications in physics

A study by the Institute of Physics suggests that requiring applicants to hold A-level physics qualifications could improve patient outcomes and diagnostic techniques. Medical schools are encouraged to revisit this requirement to provide students with a strong foundation in physics-based medicine.

SourceThe Lancet_DELETED·JournalThe Lancet·DateApr 17, 2012

Sunlight plus lime juice makes drinking water safer

Researchers found that adding lime juice to water treated with solar disinfection removed detectable levels of E. coli significantly faster than solar disinfection alone. The treatment time was comparable to boiling and other household methods, making it a potential effective solution for improving water quality in low-income regions.

SourceJohns Hopkins Bloomberg School of Public Health·JournalAmerican Journal of Tropical Medicine and Hygiene·DateApr 17, 2012

Good vibrations in fight against cancer

Researchers at Case Western Reserve University have developed a magnetic nanochain delivery system that explodes chemotherapy drugs inside tumors, killing cancer cells more efficiently. The technology reduced tumor growth by up to 90% and increased survival rates in rats with triple-negative breast cancer.

SourceCase Western Reserve University·JournalACS Nano·DateApr 17, 2012

The sea as a rubbish tip

A team of researchers has proposed standardised guidelines for the recording and characterisation of microplastic particles in the sea. By analysing 68 scientific publications, they found that the results are difficult to compare due to varying methods used. However, they discovered that using a net with a mesh of 85 micrometres can fi...

SourceHelmholtz Association·JournalEnvironmental Science & Technology·DateApr 17, 2012

Diagnostic yield of colonoscopy for melena after nondiagnostic upper endoscopy is lower than previously reported

A study found the diagnostic yield of colonoscopy for melena after a nondiagnostic upper endoscopy to be 4.8 percent, significantly lower than previously reported. The rate of therapeutic intervention was also very low at 1.7 percent, suggesting that most procedures are diagnostic-only and can be performed on an elective basis.

SourceAmerican Society for Gastrointestinal Endoscopy·JournalGastrointestinal Endoscopy·DateApr 17, 2012

A toxic menu

A small marine worm can survive on poisonous carbon monoxide and hydrogen sulphide thanks to symbiotic bacteria that use these compounds to produce food for the worm. The worm has lost its entire digestive system over millions of years of evolution, relying solely on its symbionts for nutrition.

SourceMax-Planck-Gesellschaft·JournalProceedings of the National Academy of Sciences·DateApr 17, 2012

Kidney cancer patients do better when whole kidney is not removed, U-M study shows

A new University of Michigan study found that patients with early-stage kidney cancer who underwent partial nephrectomy had better survival rates than those who received radical nephrectomy. The study analyzed data from 7,138 Medicare beneficiaries and showed that younger or medically compromised patients benefited most from the less i...

Nanocrystal-coated fibers might reduce wasted energy

Researchers have developed nanocrystal-coated glass fibers that can generate electricity when exposed to heat, potentially recovering 10% of the energy wasted in US industries. The technology also enables solid-state cooling without compressors or refrigerants, making it suitable for use in garments and industrial applications.

SourcePurdue University·JournalNano Letters·DateApr 17, 2012

Survey finds errors in Wikipedia articles

A survey of public relations professionals found that 60 percent of articles on their company's clients contained factual errors. The research highlights the need for clear guidelines and consistent rules from Wikipedia regarding factual corrections, as many respondents struggled with engaging editors and securing responses.