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Science News for December 2, 2010


Light touch brightens nanotubes

Rice University researchers found that adding tiny amounts of ozone to single-walled carbon nanotubes decorates them with oxygen atoms, enhancing their near-infrared fluorescence intensity and shifting the wavelength. The process is simple enough for a physical chemist to do, and lab tests showed stable fluorescent properties for months.

SourceRice University·JournalScience·DateDec 2, 2010

Genetic mutations associated with increased PSA and prostate cancer

Researchers have identified genetic mutations associated with elevated PSA levels in men diagnosed with prostate cancer, offering potential new biomarkers for disease monitoring. The study's findings suggest that sequencing of selected mitochondrial regions could provide valuable information for prognosis.

SourceCell Press·JournalAmerican Journal of Human Genetics·DateDec 2, 2010

Evanescent wave imaging of adsorbed protein layers

Scientists have successfully visualized adsorbed protein layers using evanescent wave imaging, demonstrating its potential for monitoring protein adsorption. The study optimized conditions by applying a polarized beam and incorporating a surface-enhanced medium, leading to significant increases in image contrast.

Low-status leaders are ignored

A new study from Rice University found that players are more likely to imitate high-status leaders and ignore low-status leaders in a repeated public-goods game. Contributions from followers with low-status leaders dropped off even as their leaders increased their contributions, showing the importance of leader status on cooperation.

SourceRice University·JournalJournal of Public Economic Theory·DateDec 2, 2010

Checklist continues to stop bloodstream infections in their tracks, this time in Rhode Island

Researchers in Rhode Island, led by Johns Hopkins Medicine, reduced central-line associated bloodstream infections to near zero using the widely-heralded Johns Hopkins checklist and other patient-safety tools. The intervention prevented 42 infections, saved 10 lives, and reduced ICU stays by 608 days.

SourceJohns Hopkins Medicine·JournalGlobal Journal on Quality and Safety in Healthcare·DateDec 2, 2010

Researchers discover a way to simultaneously desalinate water, produce hydrogen and treat wastewater

A new study by the University of Colorado Denver has discovered a way to simultaneously desalinate water, produce hydrogen gas, and treat wastewater. The technology uses microbial electrolysis and desalination cells, which can generate pure hydrogen gas and facilitate desalination with an external power supply.

SourceUniversity of Colorado Anschutz Medical Campus·JournalEnvironmental Science & Technology·DateDec 2, 2010

Pilots of the future: Suicide and the internet

The internet can provide anonymous space for expressing oneself and finding sympathetic listeners, but also poses risks of bullying, cyberbullying, and exposure to harmful information. Experts call for new public health initiatives to address the complex issue of online suicide prevention.

SourceThe Lancet_DELETED·JournalThe Lancet·DateDec 2, 2010

Genetic alteration linked with disorders of sex determination

A study published in the American Journal of Human Genetics reveals a genetic alteration, MAP3K1, responsible for disorders of sex determination (DSD). The discovery provides insight into the cause of DSDs and contributes to better management, including the importance of removing gonads early to prevent cancer.

SourceCell Press·JournalAmerican Journal of Human Genetics·DateDec 2, 2010

New discovery prevents symptoms of rare genetic disorder

A new study by Iowa State University researchers demonstrates that replacing the enzyme for MPS I shortly after birth can prevent irreversible damage and clinical signs of brain, heart, and bone disease. The breakthrough opens the door to improved methods of enzyme delivery in human patients with similar genetic disorders.

SourceIowa State University·JournalScience Translational Medicine·DateDec 2, 2010

Smoking may thin the brain

A new study finds that smoking is associated with reduced cortical thickness in the left medial orbitofrontal cortex, negatively correlating with cigarette consumption. Heavier smoking was linked to more pronounced thinning of cortical tissue, potentially increasing the risk for addictions and cognitive decline.

SourceElsevier·JournalBiological Psychiatry·DateDec 2, 2010

'Less is more,' when it comes to sugary, high-caffeine energy drinks, researchers say

Research suggests that moderate energy drink consumption can enhance behavioral control, but increased caffeine intake leads to decreased mental fatigue and impaired cognitive performance. Additionally, the study found that adolescents who consumed more caffeine had higher diastolic blood pressure and ate more high-sugar snack foods.

SourceAmerican Psychological Association·JournalExperimental and Clinical Psychopharmacology·DateDec 2, 2010

Energy use in the media cloud

Researchers estimate global media consumption will drive 2,570 exabytes of data per year by 2030. To achieve renewable energy infrastructure, a 60-performance improvement in efficiency is needed, potentially reached by 2021. Behaviour change strategies like reducing digital waste and persuasive web design can reduce overall demand.

Personalized diets for elderly after hospitalization decreases mortality rates

A new study by Ben-Gurion University of the Negev has shown that individually tailored dietary treatment for acutely hospitalized elderly can significantly reduce mortality rates. The study found a 64% decrease in death rates among those receiving intensive nutritional treatment compared to the control group.

SourceAmerican Associates, Ben-Gurion University of the Negev·JournalJournal of the American Geriatrics Society·DateDec 2, 2010

Spanish Oncology to establish a new standard treatment on breast cancer at early stages

A Spanish Oncology study has established a new standard treatment for early-stage breast cancer, reducing the risk of recurrence by 32% in women with high-risk but node-negative disease. The treatment, which combines docetaxel with cyclophosphamide, was found to improve disease-free survival and overall quality of life.

SourceGEICAM (Grupo Español de Investigación en Cáncer de Mama)·JournalNew England Journal of Medicine·DateDec 2, 2010