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Science News Archive May 2018 - Page 18


Page 18 of 44

A better way to control crystal vibrations

By doping aluminum oxide with neodymium, researchers can control phonon frequencies and speeds, leading to improved thermal conductivity and efficiency in thermoelectric devices. This breakthrough provides a simpler and cheaper way to tune material properties, enabling new applications in solid-state lighting and electronics.

SourceAmerican Institute of Physics·JournalApplied Physics Letters·DateMay 21, 2018

Sleep better, parent better: Study shows link between maternal sleep and permissive parenting

A new study from the University of Illinois found that mothers who don't get enough sleep or have poor quality sleep are more likely to engage in permissive parenting with their adolescents. Mothers who receive adequate sleep, on the other hand, are less likely to be permissive and report better parenting behaviors.

What can snakes teach us about engineering friction?

Researchers at Drexel University have found that snake skin's unique texture and micro-structure create a distinct friction profile, which can be used to inform the design of textured surfaces. By studying over 350 species of snakes, they have developed a framework for creating 'smart surfaces' with new frictional capabilities.

SourceDrexel University·JournalJournal of the Mechanical Behavior of Biomedical Materials·DateMay 21, 2018

Quantum effects observed in photosynthesis

Researchers have found quantum effects in photosynthetic systems at low temperatures, challenging the idea that these effects are unique to non-biological systems. The study also reveals that regular vibrations, not superposition, were responsible for earlier reported observations.

SourceUniversity of Groningen·JournalNature Chemistry·DateMay 21, 2018

Variations in placental microbiota appear related to premature birth

A study published in Applied and Environmental Microbiology found a surplus of pathogenic bacteria in placentas from premature births, supporting the hypothesis that maternal infection may cause preterm birth. The research also discovered evidence of placental bacteria in healthy pregnancies, challenging conventional wisdom.

SourceAmerican Society for Microbiology·JournalApplied and Environmental Microbiology·DateMay 18, 2018

Matabele ants: Travelling faster with detours

The Matabele ant, a species of termite-eating ant, uses detours to increase its speed while traveling back to the nest. By taking the quickest route rather than the shortest one, they reduce their travel time by an average of 35%. This navigational skill is unique to this species and allows individual ants to make decisions independently.

SourceUniversity of Würzburg·JournalJournal of Experimental Biology·DateMay 18, 2018

Ammunition with risks and side effects

A study by researchers at Technical University of Munich found that alternative shotgun ammunition materials containing copper and zinc can be highly toxic to water organisms, potentially threatening environmental protection. The study suggests a ban on these materials may be necessary to replace lead shot.

SourceTechnical University of Munich (TUM)·JournalKnowledge and Management of Aquatic Ecosystems·DateMay 18, 2018

Drug used to treat daytime sleepiness does not appear to improve driving in those with sleep apnea

A study found that armodafinil did not improve driving performance or reduce daytime sleepiness in individuals with moderate to severe sleep apnea. However, participants taking the drug lost more body fat than those receiving a placebo, suggesting potential benefits for weight loss.

SourceAmerican Thoracic Society·JournalAmerican Journal of Respiratory and Critical Care Medicine·DateMay 18, 2018

UNC researchers discover how body temperature wrecks potential dengue, Zika vaccine

Researchers from UNC School of Medicine found that natural body temperature affects the stability of a promising vaccine component, potentially rendering it ineffective against dengue and Zika viruses. The study suggests that stabilizing the pairing propensity of this component is critical to creating an effective vaccine.

SourceUniversity of North Carolina Health Care·JournalJournal of Biological Chemistry·DateMay 18, 2018

Flow of cerebrospinal fluid regulates neural stem cell division

Researchers at Helmholtz Zentrum München discovered that cerebrospinal fluid flow stimulates neural stem cell division through ENaC channel protein. The study highlights a new mechanism controlling neural stem cell proliferation and has implications for brain function and treatment.

Optimum shade for cocoa

Researchers found that a shade-tree cover of approximately 30% has a predominantly positive effect on cocoa plants, maintaining maximum soil moisture and keeping pests and diseases in check. This amount of shade also increases animal and plant species, carbon sequestration, and cooling effects on temperature.

SourceETH Zurich·JournalNature Sustainability·DateMay 18, 2018