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Science News Archive 2021 - Page 396


Page 396 of 510

Women in cities less likely to have children

A Finnish study analyzed the reproductive histories of women who moved from rural to urban areas during WWII and found that urban women were 15% less likely to reproduce than their rural counterparts. The study suggests that women may be delaying childbearing due to increased competition for spouses in urban environments.

SourceOxford University Press USA·JournalBehavioral Ecology·DateMar 18, 2021

Leading blue energy revolution

Researchers at CUHK have developed a water-tube-based triboelectric nanogenerator (WT-TENG) for harnessing irregular and low-frequency environmental energy, such as ocean waves. The device generates high output volumetric charge density, reaching 9 mC/m3, and can be easily combined to create larger units for increased power generation.

SourceThe Chinese University of Hong Kong·JournalAdvanced Energy Materials·DateMar 18, 2021

New material: Rapid color change

Scientists have developed a new material with faster and more efficient electrochromic properties than existing materials. The material, called Covalent Organic Frameworks (COFs), can be triggered by an applied electrical voltage, allowing for rapid color change and high sensitivity to electrochemical oxidation.

SourceLudwig-Maximilians-Universität München·JournalJournal of the American Chemical Society·DateMar 18, 2021

Dolphins adapt to survive invasive coastal constructions

Bottlenose dolphins adapted to coastal construction by shifting feeding locations and behavior timings, but these changes persisted after construction. Human activities like dredging and pile driving cause significant stress and harm to marine wildlife, emphasizing the need for conservation policies.

SourceFrontiers·JournalFrontiers in Marine Science·DateMar 18, 2021

Teamwork makes light shine ever brighter

Researchers found that combining energy sources increases light emission from nanoscale devices, potentially enabling faster computer chips and advanced photocatalysts. The effect is attributed to the enhancement of hot electron generation through anti-Stokes electronic Raman scattering.

SourceRice University·JournalNano Letters·DateMar 18, 2021

Dieting suppresses 'cellular engines', weight loss surgery gives boost to mitochondria

Researchers found that dieting impairs the energy-producing machinery of fat tissue, resulting in rapid weight regain, whereas bariatric surgery improves mitochondrial function and reduces regaining weight. The study used transcriptomics analysis to examine the effects of dieting and surgery on adipose tissue mitochondria.

SourceUniversity of Helsinki·JournalThe Journal of Clinical Endocrinology & Metabolism·DateMar 18, 2021

Parasites may make dogs smell good to insect vector

A study found that infected dogs emit an odor attractive to female sand flies, which transmit Leishmania infantum, the parasite causing visceral leishmaniasis. The researchers suggest parasites manipulate their host's scent to improve transmission opportunities.

SourcePLOS·JournalPLOS Pathogens·DateMar 18, 2021

COVID-19 denial depends on a population's trust in social institutions

A study of over 150,000 respondents found that COVID-19 denial depends on people's trust in social institutions, particularly healthcare systems. EU countries demonstrate varying levels of stress and trust in governments, with some showing high levels of stress and others trusting their governments more than other institutions.

SourceNational Research University Higher School of Economics·JournalRoyal Society Open Science·DateMar 18, 2021

Reversing cancer's gluttony

Researchers discovered pancreatic cancer cells employ macropinocytosis, a novel pathway to procure nutrients when autophagy is inhibited, enabling them to thrive despite starvation. A combination of autophagy and macropinocytosis inhibitors resulted in rapid tumor regression in mouse models.

SourceUniversity of California - San Diego·JournalCancer Cell·DateMar 18, 2021

New studies in indigenous languages

Researchers examine the biographical information of individual heritage language speakers, highlighting the significance they place on their language in everyday life. The study sheds light on the maintenance and revitalization of minority cultures through the personal experiences of indigenous activists.

SourceUniversity of Chicago Press Journals·JournalJournal of Anthropological Research·DateMar 18, 2021