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Science News Archive 2021 - Page 85


Page 85 of 510

Survey of US dentists shows high rate of opioid prescriptions despite knowledge of effective alternatives

A survey of US dentists found that an overwhelming majority believe nonsteroidal anti-inflammatory drug (NSAID)-acetaminophen combinations are as effective or more effective in managing dental pain as opioids. However, nearly half still prescribe opioids, highlighting a disconnect between their knowledge and prescribing habits.

SourceGeorgetown University Medical Center·JournalThe Journal of the American Dental Association·TypeSurvey·DateOct 21, 2021

Study offers snapshot of celebs’ social media influence on COVID-19 info

A study published in the Atlantic Journal of Communication analyzed Instagram posts from 20 celebrity influencers about COVID-19 between March and May 2020. The researchers found that celebrities initially modeled guidance from health experts, normalizing suggested behaviors such as staying home and practicing hand hygiene.

SourceUniversity of Texas at Dallas·JournalAtlantic Journal of Communication·TypeData/statistical analysis·DateOct 21, 2021

How to make a better polymer

A team of researchers at UMass Amherst has developed a method to count the number of strength-enabling entanglements in glassy polymers, which can be used to create stronger, more cost-effective materials. By combining computer simulations with experimental processes, they found that not every entanglement contributes to the polymer's ...

SourceUniversity of Massachusetts Amherst·JournalScience Advances·DateOct 21, 2021

Supernova: A glowing DNA enzyme

Researchers at IOCB Prague have created a glowing DNA enzyme called Supernova, which catalyzes a chemiluminescent reaction. This breakthrough uses artificial evolution to identify light-producing deoxyribozymes in a vast library of DNA molecules, opening up new possibilities for point-of-care assays and high-throughput screens.

Neuroscientists see how practice really does make perfect

Researchers at Duke University used new tools to monitor neurons and analyze machine learning data to see how zebra finches practice their courtship calls. They found that a neurotransmitter called noradrenaline shuts down variability in the song, making it more precise when performed under pressure.

SourceDuke University·JournalNature·TypeData/statistical analysis·DateOct 21, 2021

Chip-based optical tweezers levitate nanoparticles in a vacuum

Researchers created tiny chip-based optical tweezers that can be used to optically levitate nanoparticles in a vacuum, reducing the footprint of traditional optical traps. The new design enables precise sensing applications and has potential uses for studying near-surface forces and quantum processes.

SourceOptica·JournalOptica·DateOct 21, 2021

Modeling cellular migration

Researchers develop 3D simulation capturing how cells containing vimentin move through body tissue, crucial for understanding cancer spread and wound healing. The study reveals vimentin's protective role in nuclear DNA and its potential as a target for cancer treatment.

SourceSyracuse University·JournalNew Journal of Physics·DateOct 21, 2021

Topological holographic quench dynamics in a synthetic frequency dimension

Researchers developed a method to detect topological phase using quench dynamics and synthetic frequency dimension, simplifying the characterization of non-equilibrium states. The study proposes a new approach for performing dynamical characterization of topological quantum phases in different models.

‘Raptor-like’ dinosaur discovered in Australian mine, actually uncovered as a timid vegetarian

A 'raptor-like' dinosaur was actually a timid, long-necked herbivore, according to recent reanalysis of fossil footprints found in an Australian coal mine. The Prosauropod, a plant-eating dinosaur with legs about 1.4 metres tall and a body length of six metres, is the earliest evidence of its kind in Australia, marking a 50-million-yea...

SourceTaylor & Francis Group·JournalHistorical Biology·DateOct 21, 2021

Novel peroxide-based material emits fluorescence in response to stress

Researchers have synthesized a novel organic peroxide mechanophore that releases fluorescence in response to mechanical stress. The compound, bis(9-methylphenyl-9-fluorenyl) peroxide (BMPF), was incorporated into a polymer network and found to retain its ability to release a fluorescent molecule when subjected to grinding or compression.

SourceTokyo Institute of Technology·JournalJournal of the American Chemical Society·TypeExperimental study·DateOct 21, 2021

Cell-free DNA identifies early signs of relapse in pediatric medulloblastoma

Researchers at St. Jude Children's Research Hospital have developed a test to detect measurable residual disease (MRD) in children treated for medulloblastoma, identifying those at risk of relapse earlier than traditional imaging scans. The study found that cell-free DNA in cerebrospinal fluid can be used to predict relapse and potenti...

Rethinking grid integration of a massive renewable power expansion to achieve carbon neutrality in China and beyond

A new model suggests that integrating massive offshore wind generation, power storage, electric vehicles, green hydrogen production, and expanded transmission can reduce costs of renewable power integration into the grid. This strategy could make achieving China's carbon neutrality by 2050 feasible without significantly increasing costs.

Large climate benefits could be achieved by reducing nitrous oxide emissions over small fraction of the world’s croplands

A new study maps global cropland nitrous oxide emissions and finds that reducing fertilizer application over 20% of the world's croplands could achieve 65% of global mitigation potential. The research identifies hotspots of high emissions in humid subtropical regions, where climate and soil characteristics play a significant role.

SourcePeking University·JournalNature Food·DateOct 21, 2021

Skin-inspired sensors show how our body moves

Scientists at the University of Groningen developed wearable, stitchable, and sensitive sensors from flexible polymers and carbon fibre. These sensors can measure body position, movement, and touch, offering new possibilities for health monitoring and athlete performance tracking.

SourceUniversity of Groningen·Journalnpj Flexible Electronics·TypeExperimental study·DateOct 21, 2021

First-ever Africa-wide great ape assessment reveals human activity, not habitat availability, is greatest driver of ape abundance

A new study assesses Africa-wide great ape populations and finds that human activities, such as GDP, roads, and population density, are the strongest factors predicting abundance. Only 10.7% of predicted apes were found in areas with high levels of legal protection.

SourceWildlife Conservation Society·JournalAmerican Journal of Primatology·TypeMeta-analysis·DateOct 21, 2021

Evaluating protection against SARS-CoV-2 Beta variant in vaccine-boosted nonhuman primates

A new study shows that boosting nonhuman primates with the Moderna vaccine six months after their primary series increases neutralizing activity against viral variants of concern. The boost sustained antibody responses for at least eight weeks, suggesting significant B cell memory induced by primary vaccination.