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Science News for December 13, 2012


Despite hype, costly prostate cancer treatment offers little relief from side effects

A recent study published in the Journal of the National Cancer Institute found that proton radiotherapy provides minimal relief from side effects such as incontinence and erectile dysfunction compared to standard radiation treatment IMRT. The study revealed no long-term benefits for proton therapy, despite high costs.

SourceYale University·JournalJNCI Journal of the National Cancer Institute·DateDec 13, 2012

Reality check for DNA nanotechnology

Scientists have made significant breakthroughs in DNA nanotechnology by removing obstacles to design processes. They demonstrated the first validation of subnanometer-scale positional control and discovered a method for rapid folding and high-yield production of complex DNA-based objects, similar to protein folding.

HPV in older women may be due to reactivation of virus, not new infection

A new study suggests that human papillomavirus (HPV) infections in older women may represent reactivation of the virus, rather than a new infection. Nearly 90% of HPV infections were detected in women with multiple lifetime sexual partners, highlighting the need for further research on HPV persistence and reactivation.

SourceInfectious Diseases Society of America·JournalThe Journal of Infectious Diseases·DateDec 13, 2012

Predicting risk of arrhythmias and sudden cardiac death: There's a computer model for that

A new computer model of the heart wall predicted risk of irregular heart rhythms and sudden cardiac death in patients with Long QT syndrome type 1. The model used 34 different mutations to calculate the consequences of genetic changes on the heart, revealing that delayed repolarization increases the risk of life-threatening events.

SourceUniversity of Rochester Medical Center·JournalJournal of the American College of Cardiology·DateDec 13, 2012

Study helps bridge gap in understanding of suicide risk for African-American women

A study co-authored by University of Kentucky sociologists examines the relationship between racial and gender discrimination and suicidal ideation among low socioeconomic status African American women. The research found that moderate levels of eudemonic well-being, self-esteem, and active coping are protective against suicidal ideation.

SourceAmerican Sociological Association·JournalSocial Psychology Quarterly·DateDec 13, 2012

Time restrictions on TV advertisements ineffective in reducing youth exposure to alcohol ads

New research from the Johns Hopkins Bloomberg School of Public Health and the Dutch Institute for Alcohol Policy confirms that time restrictions on alcohol advertising actually increase teen exposure. Alcohol companies move their ads to late-night programming when most teens are watching, increasing ad exposure for high-risk youth.

SourceJohns Hopkins Bloomberg School of Public Health·JournalJournal of Public Affairs·DateDec 13, 2012

Building better structural materials

A team of scientists has made a breakthrough in understanding how materials behave under stress, leading to the creation of stronger and longer-lasting materials. Nickel nanocrystals have been found to deform permanently under intense pressure, which could help physicists and engineers create more resilient materials.

Researchers identify target to help protect kidney patients' heart health

Blocking the endothelin receptor reduces cardiovascular risk factors in patients with chronic kidney disease independent of blood pressure. The findings suggest that blocking the receptor may provide heart-related benefits to these patients, who have a higher risk of developing heart problems due to their condition.

SourceAmerican Society of Nephrology·JournalJournal of the American Society of Nephrology·DateDec 13, 2012

Problems with mineral metabolism linked with kidney disease progression

A study found that disordered mineral metabolism worsens with progressive chronic kidney disease and is linked to a higher risk of kidney failure among African Americans. Measuring mineral metabolites may be a useful way to determine CKD patient prognosis, while targeting these metabolites could help slow disease progression.

SourceAmerican Society of Nephrology·JournalJournal of the American Society of Nephrology·DateDec 13, 2012

Rice uses light to remotely trigger biochemical reactions

Researchers at Rice University have created a method to trigger biochemical reactions remotely on demand by exposing plasmonic gold nanoparticles to near-infrared light, enabling chemical processes to occur at lower temperatures. This technology has great potential for industrial applications, including energy savings and more sustaina...

SourceRice University·JournalACS Nano·DateDec 13, 2012

Association of Environmental Engineering and Science Professors name Environmental Engineering Science as its official journal

The Association of Environmental Engineering and Science Professors (AEESP) has selected Environmental Engineering Science as its official journal, promoting innovative solutions to environmental problems. The journal will publish state-of-the-art studies on air, water, and land contamination and waste disposal.

SourceMary Ann Liebert, Inc./Genetic Engineering News·JournalEnvironmental Engineering Science·DateDec 13, 2012

Intestinal immune cells play an unexpected role in immune surveillance of the bloodstream

A team of researchers from Massachusetts General Hospital has discovered that intestinal immune cells collect and process antigens from both the bloodstream and the intestine, inducing the production of T cells that suppress inflammation. This regulatory system is crucial for preventing autoimmune disorders and inflammatory bowel disease.

SourceMassachusetts General Hospital·JournalImmunity·DateDec 13, 2012

More signs of the benefits of marriage?

A new study found married women experience less intimate-partner violence, substance abuse and post-partum depression compared to cohabitating women. Married couples tend to have fewer psychosocial problems regardless of their relationship duration.

SourceSt. Michael's Hospital·JournalAmerican Journal of Public Health·DateDec 13, 2012

A thin-skinned catalyst for chemical reactions

Boston College researchers create a yolk-shell nanocrystal structure with a porous 'skin' that can filter molecules based on size or chemical makeup, allowing greater selectivity in chemical reactions. The new catalyst exhibits unprecedented control and precision, paving the way for expanded applications of heterogeneous catalysis.

SourceBoston College·JournalJournal of the American Chemical Society·DateDec 13, 2012

Wearable technology can monitor rehabilitation

Researchers from Italy have developed a wearable system that uses strain sensors to monitor human trunk movements and estimate flexibility. The device will enable remote monitoring of physiotherapy exercises at home or during everyday tasks, providing an advancement in portable rehabilitation tracking.

SourceBMC (BioMed Central)·JournalBioMedical Engineering OnLine·DateDec 13, 2012

Aerobic exercise boosts brain power

Aerobic exercise has been shown to improve cognitive function in older adults, including task switching, selective attention, and working memory. The evidence suggests that regular physical activity can attenuate age-related decline in these areas, providing a simple means for people to optimize their brain power.

SourceSpringer·JournalPsychonomic Bulletin & Review·DateDec 13, 2012

Cancer stem cells isolated from kidney tumors

Researchers have isolated cancer stem cells from kidney tumors that lead to Wilms' tumours, a type of cancer typically found in the kidneys of young children. These cancer stem cells can be targeted with an antibody drug, providing a potential new approach for treating this disease.

SourceEMBO·JournalEMBO Molecular Medicine·DateDec 13, 2012

Disaster map predicts bleak future for mammals

A study published by the Zoological Society of London predicts that mammals will face a bleak future due to climate change, with 1/3 species at risk from cyclones and droughts. The research identifies primates as particularly vulnerable, highlighting the need for conservation efforts to mitigate the impacts of extreme weather events.

SourceZoological Society of London·JournalConservation Letters·DateDec 13, 2012