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Science News for April 28, 2015


New study links drinking behaviors with mortality

A new study by University of Colorado Boulder researchers found that social and psychological problems caused by drinking generally trump physically hazardous drinking behaviors when it comes to overall mortality rates. Light drinkers reported surprisingly high percentages of problems, with 48% experiencing some issue with alcohol in t...

SourceUniversity of Colorado at Boulder·JournalDrug and Alcohol Dependence·DateApr 28, 2015

Childhood obesity -- 1 epidemic or 2?

A new study found that childhood obesity has distinct causes depending on the age of the child. In toddlers, weight gain is largely influenced by parental factors, while adolescents experience weight gain across the entire age group, regardless of parentage. The study suggests that public health strategies may need to be tailored accor...

SourceUniversity of Exeter·JournalInternational Journal of Obesity·DateApr 28, 2015

Monkey droppings complement field observations, researchers report

Researchers used high-throughput sequencing to analyze fecal DNA of saddleback tamarins, identifying 20 families and genera of invertebrates consumed. This study complements behavioral observations and ecological sampling, providing insight into the monkeys' foraging strategies.

Joslin research finds gastric band and weight management therapies offer similar benefits

A clinical trial by Joslin Diabetes Center found that adjustable gastric band surgery and intensive group-based medical diabetes and weight management program achieved similar improvements in controlling blood sugar levels after one year. Participants experienced significant weight loss and better quality of life with both approaches.

SourceJoslin Diabetes Center·JournalThe Journal of Clinical Endocrinology & Metabolism·DateApr 28, 2015

Small high school reform boosts districtwide outcomes

A study by New York University researchers found that small high school reform leads to improved graduation rates and test scores in both new and existing larger schools. The reform resulted in a 13 percentage point increase in graduation rates among students in small high schools compared to those in continuously operating schools.

SourceNew York University·JournalEducational Researcher·DateApr 28, 2015

Age at surgery and valve type in PVR key determinants of re-intervention in congenital heart disease

A retrospective review of 633 patients found that younger age, small body weight, and certain valve types significantly increased the risk of re-intervention. Patients under 18 years old had a five times greater risk than adults, with younger children being more likely to require surgical or cardiac catheterization re-interventions.

Electron chirp: Cyclotron radiation from single electrons measured directly for first time

Researchers have successfully detected cyclotron radiation from single electrons, a phenomenon predicted in 1904, and developed a new method to measure the energy of electrons. This technique has the potential to determine the mass of neutrinos, which are essential for understanding the universe's large-scale structure.

SourceDOE/Pacific Northwest National Laboratory·JournalPhysical Review Letters·DateApr 28, 2015

A glitch in the recycling

A recent study by Ludwig Institute for Cancer Research has made a significant breakthrough in understanding the molecular mechanisms behind Parkinson's disease. The researchers discovered that disruption of a developmental mechanism, Lmx1b, leads to the death of dopamine-producing neurons, resulting in the symptoms of PD.

SourceLudwig Institute for Cancer Research·JournalNature Neuroscience·DateApr 28, 2015

Windows that act like an LCD Screen

A novel liquid crystal technology allows displays to flip between transparent and opaque states, increasing visibility while reducing the need for power. The new design remedies previous problems with scattering and absorption, providing a faster response time and improved energy efficiency.

SourceAmerican Institute of Physics·JournalAIP Advances·DateApr 28, 2015

Diverse sea creatures evolved to reach same swimming solution

A new study reveals that diverse sea creatures have evolved to swim with elongated fins using the same mechanical motion, maximizing speed and ensuring survival. The researchers found a consistent ratio of 20, known as the optimal specific wavelength (OSW), which is a key finding in understanding convergent evolution.

SourcePLOS·JournalPLOS Biology·DateApr 28, 2015

Elderly crickets are set in their ways, study finds

A new study published in Behavioural Ecology found that elderly crickets' behavior becomes more entrenched with age, making them less responsive to changing environmental conditions. This suggests that older individuals may struggle to adapt to changes in climate, habitat, or diet, potentially affecting their survival prospects.

SourceUniversity of Exeter·JournalBehavioral Ecology·DateApr 28, 2015

Megacity metabolism: Is your city consuming a balanced diet?

A comprehensive survey of resources used and removed in the world's largest metropolitan areas reveals that megacities consume significantly more energy and produce more solid waste than other regions. Despite having a relatively small percentage of the global population, megacities generate a substantial proportion of global GDP.

SourceUniversity of Toronto Faculty of Applied Science & Engineering·JournalProceedings of the National Academy of Sciences·DateApr 28, 2015

Embracing the 5G era

Recent research on 5G has systematically overviewed latest progress on network architecture and promising techniques, including NOMA, MIMO, and cognitive radio. The study highlights potential key areas of research to overcome the spectrum crisis in global wireless communications.

Human hunting weapons may not have caused the demise of the Neanderthals

A new study published in the Journal of Human Evolution suggests that technological innovations in hunting weapons may not have been a driving force behind the colonization of Europe by anatomically modern humans. The researchers found that stone tools used by humans around 40,000 years ago appeared in Europe earlier than previously th...

SourceElsevier·JournalJournal of Human Evolution·DateApr 28, 2015

Two-week international diet swap shows potential effects of food on colon cancer risk

A two-week international diet swap study found that changing from a Westernized to an African high-fiber, low-fat diet reduced biomarkers of cancer risk in both African-American and rural South African volunteers. Increasing fiber intake and reducing animal fat and proteins may help lower colon cancer risk.

Studies in cell transplantation show beneficial effects for variety of serious conditions

Researchers have made significant progress in cell transplantation therapy, demonstrating improved outcomes for patients with complete spinal cord injury and potential treatments for Parkinson's disease. Studies also show that human pluripotent stem cells hold promise for treating the disease.

Rubber from dandelions

Researchers at TUM and IME identified a protein complex on rubber particles responsible for the formation of polyisoprene, the main component of rubber. The study found two key proteins necessary for natural rubber biosynthesis in dandelion plants. This discovery brings biotechnological manufacturing of rubber closer.

SourceTechnical University of Munich (TUM)·JournalNature Plants·DateApr 28, 2015

Loyola study provides evidence that premature girls thrive more than premature boys

A new study from Loyola University Medical Center found that female infants tend to do better than males when born prematurely, achieving independent oral feeding at 36 weeks and four days on average. Researchers also discovered that being born before 29 weeks of pregnancy negatively influences the ability to eat independently.

SourceLoyola Medicine·JournalJournal of Neonatal-Perinatal Medicine·DateApr 28, 2015

Childhood bullying causes worse long-term mental health problems than maltreatment

A new study published in The Lancet Psychiatry found that children who experienced bullying had worse long-term mental health problems than those who were maltreated by adults. The research, led by Professor Dieter Wolke, analyzed data from over 5,000 participants and found that being both bullied and maltreated increased the risk of o...

SourceUniversity of Warwick·JournalThe Lancet Psychiatry·DateApr 28, 2015