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Science News Archive April 2015 - Page 26


Page 26 of 36

How many gold atoms make gold metal?

Gold nanoclusters of 102 and 144 atoms show distinct behavior, with smaller clusters acting like giant molecules and larger ones exhibiting metallic properties. These findings have significant implications for developing bioimaging and sensing technologies based on metal-like clusters.

SourceAcademy of Finland·JournalACS Nano·DateApr 10, 2015

New guidance on contact precautions for hospital visitors

The Society for Healthcare Epidemiology of America has released new guidelines for contact precautions for hospital visitors, aiming to strike a balance between visitor and patient safety. The recommendations vary by pathogen type, with special considerations for immunocompromised visitors or those unable to practice good hand hygiene.

SourceSociety for Healthcare Epidemiology of America·JournalInfection Control and Hospital Epidemiology·DateApr 10, 2015

Accelerating universe? Not so fast

Researchers have found two groups of type Ia supernovae with different properties, hinting at a reevaluation of the universe's expansion rate and dark energy. The discovery uses combined observations from the Hubble Space Telescope and Swift satellite.

SourceUniversity of Arizona·JournalThe Astrophysical Journal·DateApr 10, 2015

New evidence for combat and cannibalism in tyrannosaurs

Researchers have discovered that the skull of a Daspletosaurus, a large tyrannosaurine dinosaur, suffered numerous injuries during life and also after death. The injuries included bites that healed, as well as those inflicted after death by another tyrannosaur, indicating evidence of combat between two large carnivores.

SourcePeerJ·JournalPeerJ·DateApr 9, 2015

A grateful heart is a healthier heart

Research published by the American Psychological Association found that gratitude was associated with better mood, sleep, and reduced inflammation in patients with asymptomatic heart failure. Writing down things for which they were thankful daily also showed reductions in inflammatory biomarkers and improved heart rate variability.

SourceAmerican Psychological Association·JournalSpirituality in Clinical Practice·DateApr 9, 2015

New evidence supports success of fecal transplants in treatment of Clostridium difficile infection

Research demonstrates dynamic nature of fecal microbiota in FMT donors and recipients, with healthy changes sustained for up to 21 weeks after transplant. The study's findings have implications for the regulation of treatment and could influence the use of fecal transplants for a range of diseases associated with microbial imbalance.

SourceUniversity of Minnesota·JournalMicrobiome·DateApr 9, 2015

Make your home a home for the birds

A University of Illinois Chicago study found that a neighborhood's small yards have a greater impact on the variety of native birds than larger landscape features. The researchers identified bird-friendly landscaping features such as fruit-bearing trees and shrubs to increase bird diversity in backyards.

SourceUniversity of Illinois Chicago·JournalEcological Applications·DateApr 9, 2015

Early physical therapy for low back pain reduces costs, resources

A study published in BMC Health Services Research found that early physical therapy following an initial episode of acute low back pain resulted in lower healthcare costs and reduced use of resources. Patients who received physical therapy within 14 days had significantly lower costs for advanced imaging, injections, surgery, and opioids.

SourceAmerican Physical Therapy Association·JournalBMC Health Services Research·DateApr 9, 2015

The Lancet Diabetes & Endocrinology: Being underweight in middle age associated with increased dementia risk

Research published in The Lancet Diabetes & Endocrinology suggests that being underweight in middle age is associated with a higher risk of developing dementia. In contrast, obese middle-aged individuals are nearly 30% less likely to develop dementia than those of a healthy weight, contradicting previous research findings.

SourceThe Lancet·JournalThe Lancet Diabetes & Endocrinology·DateApr 9, 2015