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Science News for April 18, 2017


Predictive power

The Consortium for Advanced Simulation of Light Water Reactors (CASL) developed a model of the Watts Bar Unit 2 reactor core before startup and simulated its initial cycle. The simulations confirmed engineers' predictions on safe operation and provided detailed hour-by-hour behavior during power escalation. CASL's high-fidelity code su...

Chaining up diarrhea pathogens

Researchers at ETH Zurich have discovered that vaccine-induced IgA antibodies 'enchain' bacteria in the intestine, forming clumps that prevent disease and genetic exchange of resistant genes. This approach could lead to a new strategy for intestinal infections, including farm animal vaccination and potential human applications.

SourceETH Zurich·JournalNature·DateApr 18, 2017

Researchers identify tactic Dengue virus uses to delay triggering immune response

Researchers identified cyclic GMP-AMP synthase (cGAS) as the protein responsible for detecting viral infection, but dengue virus counteracts this by degrading cGAS. This study sheds light on a novel mechanism by which viruses evade immune detection and may inform techniques to dampen pro-inflammatory responses.

Individualizing health care one byte at a time

A team of scientists has developed an algorithm called PhenomeNET Variant Predictor (PVP) that can identify genetic changes in patients with genetic disorders. PVP uses data from non-human model organisms and a large database of gene-to-phenotype associations to prioritize variants with their likelihood of involvement in human disease.

SourceKing Abdullah University of Science & Technology (KAUST)·JournalPLOS Computational Biology·DateApr 18, 2017

Well-kept vacant lots can help reduce crime

A new study by Michigan State University found that well-kept vacant lots can help reduce crime rates in urban areas. The research analyzed nine years of crime data in Flint, Michigan, and discovered a correlation between greening efforts and decreased crime rates, including violent and property crimes.

SourceMichigan State University·JournalApplied Geography·DateApr 18, 2017

Understanding decisions: The power of combining psychology and economics

A collaborative effort between psychologists and economists reveals that combining both disciplines leads to better understanding of decisions. The research focuses on individuals' expectations for major life events, such as finding work or having children, and shows that teens are capable of estimating numerical probabilities with acc...

SourceCarnegie Mellon University·JournalProceedings of the National Academy of Sciences·DateApr 18, 2017

Paper: Nutrition label readers favor food quality over quantity

Researchers found that nutrition label users tend to select healthier foods, such as fruits, vegetables, and beans, while avoiding refined grains and fried foods. The study suggests that dining facilities can encourage healthy eating behaviors by increasing nutrient-dense food options and product reformulations.

SourceUniversity of Illinois at Urbana-Champaign, News Bureau·JournalJournal of the Academy of Nutrition and Dietetics·DateApr 18, 2017

Inflammatory bowel diseases on the rise in very young Canadian children

A new study finds that inflammatory bowel disease (IBD) cases are rising rapidly among young Canadian children, particularly those under five years old. The incidence of IBD has stabilized for children over five but continues to rise in younger age groups, with an estimated 600-650 children diagnosed annually.

SourceChildren's Hospital of Eastern Ontario Research Institute·JournalThe American Journal of Gastroenterology·DateApr 18, 2017

For young adults, cigarettes more pleasurable with alcohol than with pot

A recent study by UCSF found that young adults experience greater pleasure from smoking cigarettes while under the influence of alcohol compared to marijuana. The study, which used self-reported data from 500 participants aged 18-25, suggests that co-use of cigarettes and alcohol may be more pleasurable than co-use with marijuana.

SourceUniversity of California - San Francisco·JournalAddiction Research & Theory·DateApr 18, 2017

Bacteriophages, natural drugs to combat superbugs

Researchers discover bacteriophages that can effectively reduce bacterial levels and improve health in mice infected with antibiotic-resistant 'superbugs.' The study's findings suggest phages could be a promising alternative to antibiotics, with potential benefits including fewer side effects and the ability to evolve against resistance.

SourceBaylor College of Medicine·JournalScientific Reports·DateApr 18, 2017

Narcissism and social networking

A recent meta-analysis of 57 studies involving over 25,000 participants found a weak to moderate link between social media activity and narcissistic tendencies. Grandiose narcissists are more likely to frequent social networking sites, whereas vulnerable narcissism is associated with insecurity and social withdrawal.

SourceUniversity of Würzburg·JournalJournal of Personality·DateApr 18, 2017

Sea scorpions: The original sea monster

Researchers at the University of Alberta have found that sea scorpions likely used their serrated tail spines to kill ancient early vertebrates. The study suggests that these prehistoric predators could slash their tails from side to side, using a horizontal slashing motion to capture and dispatch their prey.

SourceUniversity of Alberta·JournalThe American Naturalist·DateApr 18, 2017

Climate change and risk to fossil fuel industry: Sustainability train has left the station

The article highlights that climate change threatens the sustainability of the fossil fuel industry, with emissions accounting for two-thirds of greenhouse gas emissions. The industry faces increasing pressures due to carbon-based businesses and economies facing impediments to consumption, according to Jim Krane and Ritchie D. Priddy.

SourceCambridge University Press·JournalMRS Energy & Sustainability·DateApr 18, 2017

Master detox molecule boosts immune defenses

Scientists at Luxembourg Institute of Health discovered a new molecular mechanism where the human immune system activates T cells to fight off pathogens through the production of glutathione, a substance that stimulates energy metabolism. This discovery offers potential therapeutic strategies for targeting cancer and autoimmune diseases.

SourceLuxembourg Institute of Health·JournalImmunity·DateApr 18, 2017

Sat nav for bread wheat uncovers hidden genes

Scientists have created the most accurate navigation system for the bread wheat genome, allowing researchers to analyze its genes more easily than ever before. The system includes detailed annotation of over 100,000 wheat genes, revealing previously hidden genes and improving crop yields.

SourceEarlham Institute·JournalGenome Research·DateApr 18, 2017

Canary in the kelp forest

Researchers found that bryozoans quickly dissolved in warmer waters exposed to acidity, changing their chemical composition to build higher levels of magnesium in their skeletons. This predisposes these animals to dissolve in ocean acidification, which is becoming more common due to climate change.

Frog slime kills flu virus

Researchers have discovered a frog-derived peptide, urumin, that specifically targets the H1 strain of influenza viruses. Urumin was found to disrupt the integrity of flu viruses without harming mammalian cells, making it a promising lead for antiviral drug discovery.

SourceEmory Health Sciences·JournalImmunity·DateApr 18, 2017

Megafaunal extinctions driven by too much moisture

Research reveals that major increases in environmental moisture caused widespread glacial-age grasslands to be replaced by peatlands and bogs, fragmenting populations of large herbivore grazers. The study found distinctive biochemical signals reflecting massive increases of moisture on the landscape.

SourceUniversity of Adelaide·JournalNature Ecology & Evolution·DateApr 18, 2017

Lasers measure jet disintegration

A team of researchers applied spectroscopic diagnostics to study sub- and supercritical jet disintegration, revealing trends important for improving jet propulsion systems. The Planar Laser Induced Fluorescence (PLIF) technique provided quantitative density data, offering new insights into fluid behavior.

SourceAmerican Institute of Physics·JournalPhysics of Fluids·DateApr 18, 2017

Charisma-challenged? You can still be a good boss

New research from Michigan State University suggests that a boss's mindset can significantly impact employee motivation. Studies found that leaders with a regulatory focus, or mindset, can adapt their behavior to elicit specific mindsets in employees, whether it's innovation or a more conservative work focus.

SourceMichigan State University·JournalOrganizational Behavior and Human Decision Processes·DateApr 18, 2017

Captive meerkats at risk of stress

New research suggests that captive meerkat groups in zoos are more susceptible to chronic stress due to their small group sizes and constant exposure to human visitors. The study measured stress levels by analyzing hormone samples from the meerkats' droppings, revealing a link between small group sizes and high visitor numbers.

SourceUniversity of Exeter·JournalRoyal Society Open Science·DateApr 18, 2017

Pigeon study takes on sexism in science

A new study by researchers at the University of California, Davis and the University of New Hampshire found hundreds of differences in gene activity between male and female rock doves. The findings aim to promote sex and gender inclusion in experimental science and shed light on physiological differences between sexes.

SourceUniversity of California - Davis·JournalScientific Reports·DateApr 18, 2017

Researchers find strong link between fast-food ads and consumption among pre-schoolers

A recent Dartmouth-led study found a strong association between fast-food TV ads and increased consumption among pre-schoolers. The research team recruited 548 parents and tracked their child's exposure to child-targeted ads, revealing that moderate or high exposure increased the likelihood of consuming fast food by about 30%.

SourceThe Geisel School of Medicine at Dartmouth·JournalPublic Health Nutrition·DateApr 18, 2017