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Science News Archive November 2021 - Page 5


Page 5 of 40

Giving shoppers a nudge to forgo plastic bags

A new study by Ohio State University found that a token donation program reduced plastic bag use by about 30% at two convenience stores on a college campus. The program, which offered customers a 5-cent token in exchange for declining a disposable bag, was effective in nudgeing shoppers away from single-use plastics.

SourceOhio State University·JournalLand Economics·DateNov 29, 2021

Climate change is making one of the world’s strongest currents flow faster

Scientists have detected a significant acceleration of the Antarctic Circumpolar Current (ACC), the only ocean current that circumnavigates the planet. The study found that climate change is causing the ACC to speed up, with prevailing westerly winds energizing ocean eddies and facilitating property exchange between ocean basins.

SourceUniversity of California - San Diego·JournalNature Climate Change·TypeData/statistical analysis·DateNov 29, 2021

A new approach to close the gap in lung cancer care

Researchers found offering surgery to current smokers can lead to more equitable care, reducing disparities in lung cancer outcomes. A new study published in The Journal of Thoracic and Cardiovascular Surgery shows that risk of complications and death following surgery is similar between current and former smokers.

SourceUniversity of Cincinnati·JournalJournal of Thoracic and Cardiovascular Surgery·TypeData/statistical analysis·DateNov 29, 2021

Schools may respond to student health and developmental needs with discipline, contributing to school-to-prison pipeline

A new study finds that schools with high levels of student substance use and depressed feelings have a higher prevalence of discipline, out-of-school suspensions, and police contact. Schools with lower levels of safety and support also experience higher discipline rates.

SourceColumbia University's Mailman School of Public Health·JournalJournal of Adolescent Health·DateNov 29, 2021

Newly improved quantum algorithm performs full configuration interaction calculations without controlled time evolutions

Researchers at Osaka City University developed a new quantum algorithm that calculates potential energy curves of molecules without controlled time evolutions. This addresses issues with conventional quantum phase estimation algorithms, enabling parallel processing and efficient full-CI calculations.

SourceOsaka City University·JournalThe Journal of Physical Chemistry Letters·TypeComputational simulation/modeling·DateNov 29, 2021

Heart repair and regeneration after a heart attack — a review

Recent clinical trials showed promising results with cardiosphere-derived cells, improving heart parameters in patients with Duchenne muscular dystrophy. Researchers investigate using cell-derived products like exosomes to boost endogenous repair pathways, while aiming to reverse cardiomyocytes' proliferation limitations.

SourceUniversity of Alabama at Birmingham·JournalJournal of the American College of Cardiology·TypeLiterature review·DateNov 29, 2021

Researchers presented the best ways to reduce of tool wear in the machining of superalloys

Researchers from South Ural State University and international universities reviewed over 200 sources to identify parameters that extend tool life in superalloys. The study suggests various methods, including tool tip texturing, flood cooling, and hybrid machining, to reduce wear and improve surface integrity.

SourceSouth Ural State University·JournalCIRP Journal of Manufacturing Science and Technology·DateNov 29, 2021

Cells’ replication of DNA is more ‘error-prone’ in microgravity

Researchers found that DNA polymerases derived from E. coli are more prone to errors under microgravity, increasing the mutation rate and potentially leading to cancer. The study's results highlight the importance of designing rotating spaceships with artificial gravity to prevent negative effects on astronauts' health.

SourceFrontiers·JournalFrontiers in Cell and Developmental Biology·TypeExperimental study·DateNov 29, 2021

Well-known drug could help the most severely affected Covid-19 patients in intensive-care departments

A study published in the American Journal of Respiratory and Critical Care Medicine found that prostacyclin treatment reduced damage to vital organs and halved mortality rates among critically ill Covid-19 patients. The research team hopes to investigate larger patient populations in future studies.

SourceUniversity of Copenhagen - The Faculty of Health and Medical Sciences·JournalAmerican Journal of Respiratory and Critical Care Medicine·TypeRandomized controlled/clinical trial·DateNov 29, 2021

Polymers with helical blocks

A team of researchers has developed a polymer that can form folded (ordered) and unfolded (disordered) domains using UV irradiation. The polymer's structure is controlled by non-bonding interactions between monomers, allowing it to be manipulated after formation.

SourceWiley·JournalAngewandte Chemie International Edition·TypeExperimental study·DateNov 29, 2021

A star in subtropical Japan: a new species of parasitoid wasp constructs unique cocoon masses hanging on 1-meter-long strings

Researchers discovered a new species of parasitoid wasp that forms star-shaped cocoon masses suspended by threads up to 1 meter long, providing protection against natural enemies. The structure can accommodate over 100 cocoons and is believed to help the wasps survive during critical periods.

SourcePensoft Publishers·JournalJournal of Hymenoptera Research·DateNov 29, 2021

Programmable interaction between quantum magnets

A team at Heidelberg University has successfully demonstrated a programmable control of spin interactions in isolated quantum systems. By adopting methods from nuclear magnetic resonance, the researchers used microwave pulses to modify the atomic spin and stall its reorientation. This breakthrough opens up new possibilities for Quantum...

SourceHeidelberg University·JournalScience·DateNov 29, 2021

Rhythms of the krill

Researchers found that Arctic krill respond to visual changes during the Arctic polar night by swimming up or down in search of food and avoiding predators. The study revealed that even small changes in light intensity can entrain the biological rhythms of krill, helping them navigate their environment.

SourceUniversity of Delaware·JournalPLOS Biology·DateNov 29, 2021

Mobile molecular robots swim in water

Researchers have created a microcrystal that utilizes self-continuous reciprocating motion for propulsion, enabling the microrobot to move itself sustainably in water. The microrobots exhibited different styles of propulsion and were affected by fin length, ratio, and elevation angle.

SourceHokkaido University·JournalSmall·TypeExperimental study·DateNov 28, 2021

About 12 percent of patients who receive common cardiac device implants develop persistent opioid use

A new study by researchers at the University of Pennsylvania School of Medicine found that 12.4% of patients who received implantable cardiac devices and filled an opioid prescription within two weeks of surgery developed persistent opioid use. Higher initial prescriptions were associated with a higher risk of persistent opioid use.

SourceUniversity of Pennsylvania School of Medicine·JournalCirculation·TypeData/statistical analysis·DateNov 26, 2021

Chemists design "molecular sea of flags"

Researchers create large molecular rings that self-assemble into a sheet-like structure on surfaces, allowing for adjustable mesh size and attachment of bulky molecules. This technology has the potential to enable novel catalysts and measure nanomechanical properties of proteins.

SourceUniversity of Bonn·JournalAngewandte Chemie·DateNov 26, 2021

Spinal muscular atrophy: Charité study confirms efficacy of gene therapy

A Charité study confirms the efficacy of gene therapy in improving muscle function and reducing mortality in children with spinal muscular atrophy. The treatment, onasemnogene abeparvoven, was found to be effective in children under two years of age, offering a promising alternative to existing treatments.

SourceCharité - Universitätsmedizin Berlin·JournalThe Lancet Child & Adolescent Health·TypeObservational study·DateNov 26, 2021

Machine learning solves the who’s who problem in NMR spectra of organic crystals

Researchers developed a machine learning method to assign NMR spectra of organic crystals probabilistically from their 2D chemical structures. The approach uses a database of chemical shifts for organic solids, reducing computational cost by up to 10,000 times compared to current methods.

SourceNational Centre of Competence in Research (NCCR) MARVEL·JournalScience Advances·TypeComputational simulation/modeling·DateNov 26, 2021