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Science News Archive 2020 - Page 99


Page 99 of 512

Study finds go-to hormone for cycad propagation ineffective

A new study published in HortScience found that the commonly used rooting hormone IBA has no effect on cycad propagation, contrary to previous research. The study's findings highlight the need for further research on cycads and could improve conservation efforts in countries where commercial IBA products are difficult to obtain.

SourceUniversity of Guam·JournalHortScience·DateOct 21, 2020

In pursuit of alternative pesticides

Scientists are developing safer alternatives to chlorpyrifos, a widely used insecticide linked to human health problems and environmental damage. Researchers are testing biodegradable hydrogel beads, targeted soil treatments, and root-based applications to minimize exposure in agricultural workers.

SourceAmerican Chemical Society·JournalChemical & Engineering News·DateOct 21, 2020

COVID-19: Distancing and masks are not enough

A new fluid dynamics model shows that tiny droplets can spread over long distances and remain airborne for a long time, making masks and distancing measures less effective. The model predicts that even with proper ventilation, it's possible to come into contact with the virus in certain environments.

SourceVienna University of Technology·JournalInternational Journal of Multiphase Flow·DateOct 20, 2020

Highly selective membranes

A team of researchers from the University of Tokyo has discovered a feedback system between water molecules that opens up new design possibilities for highly selective membranes. These membranes, which can filter out viruses and other contaminants, could also be used to improve lithium-ion battery performance.

SourceUniversity of Tokyo·JournalAngewandte Chemie International Edition·DateOct 20, 2020

Hidden-symmetry-enforced nexus points of nodal lines in layer-stacked dielectric photonic crystals

Scientists discovered a new kind of hidden symmetry in photonic crystals, leading to the emergence of triply degenerate nexus points that behave like magnetic monopoles. These nexus points enable unusual photonic band connectivities and novel transport phenomena, including spin-1 conical dispersion and canonical diffraction.

Mortality rate higher for US rural residents

A recent study by Syracuse University professor Shannon Monnat found that mortality rates are higher for U.S. working-age residents living in rural areas compared to metro areas. The gap is widening, driven by increased mortality from metabolic and respiratory diseases, suicide, alcohol-related disorders, and mental/behavioral disorders.

SourceSyracuse University·JournalPopulation Research and Policy Review·DateOct 20, 2020

Hot-button words trigger conservatives and liberals differently

A study published in the Proceedings of the National Academy of Sciences found that liberals and conservatives exhibit distinct brain responses when exposed to the same political content, particularly when it involves words related to morality, emotions, and threat. The researchers discovered that neural polarization is driven by highe...

SourceUniversity of California - Berkeley·JournalProceedings of the National Academy of Sciences·DateOct 20, 2020

New method allows more targeted measurement of thyroid hormone action in tissue

Researchers have identified phosphorus-containing compounds as markers for thyroid hormone action in tissue using non-invasive magnetic resonance spectroscopy. This allows for the measurement of hormone action in different areas of the body, potentially improving care for patients with thyroid dysfunction.

SourceMedical University of Vienna·JournalThe Journal of Clinical Endocrinology & Metabolism·DateOct 20, 2020

From pills to powder: 1 in 3 high school seniors who misused prescription opioids later used heroin

A University of Michigan study found that nearly one-third of students who reported misusing prescription opioids as high school seniors later used heroin by age 35. The research also showed a significant increase in heroin use among individuals with a history of prescription opioid misuse, contributing to the opioid epidemic.

SourceUniversity of Michigan·JournalJournal of Addiction Medicine·DateOct 20, 2020