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Science News Archive 2021 - Page 128


Page 128 of 510

First lockdown brought better air

Researchers found a decline in pollutant concentrations worldwide during the 2020 lockdown, particularly in Central Europe. The study attributed these reductions to the lockdown's impact on sectors like road and air transport, but noted that weather conditions also played a significant role.

SourceHelmholtz-Zentrum Hereon·JournalAtmospheric Chemistry and Physics·TypeData/statistical analysis·DateSep 21, 2021

Poorly circulated room air raises potential exposure to contaminants by up to 6 times

New experiments found that poorly mixed room air can lead to increased exposure to airborne contaminants, with occupants at risk of respiratory aerosols from others up to 5-6 times higher. Portable air cleaners using air pull-down can provide a simple solution to improve ventilation and reduce the risk.

SourceDOE/Lawrence Berkeley National Laboratory·JournalIndoor Air·TypeExperimental study·DateSep 21, 2021

How proteins help yeast adapt to changing conditions

A recent study published in eLife has discovered that prions, proteins known for their involvement in disease, may play a role in helping yeast cells cope with rapidly changing environmental conditions. The research found that prions can transform cell growth and survival, suggesting a new form of epigenetic control.

SourceeLife·JournaleLife·DateSep 21, 2021

Records from Lake Magadi, Kenya, suggest environmental variability driven by changes in Earth’s orbit

A new study from Lake Magadi, Kenya, suggests that environmental fluctuations in the lake are driven by changes in Earth's orbit. The geochemical analysis of the lake sediments found high concentrations of elements like molybdenum and arsenic, which were associated with euxinic conditions during periods of intense droughts.

SourceGeological Society of America·JournalGeology·DateSep 21, 2021

Lack of trust exacerbates loneliness spiral

A team of researchers found that individuals with severe loneliness have reduced trust in others, which can lead to decreased positive interactions and worsen loneliness. The study used brain scans and conversations to measure changes in brain activity and mood, providing clues for therapeutic options.

SourceUniversity of Bonn·JournalAdvanced Science·TypeExperimental study·DateSep 20, 2021

Important signs of blood clots in the lungs missed in patients with dementia

Patients with dementia presenting with shortness of breath were less likely to be tested for pulmonary embolism compared to those without dementia. Clinical signs and risk factors, such as elevated heart rate, were also evaluated differently in patients with dementia.

SourceUniversity of California - Los Angeles Health Sciences·JournalJournal of the American Geriatrics Society·TypeObservational study·DateSep 20, 2021

A sandblaster at the atomic level

A computational model predicts the effects of ion bombardment on surfaces with varying degrees of roughness, enabling accurate calculation of material removal. The study's findings have implications for fusion research, astrophysics, and industrial applications.

SourceVienna University of Technology·JournalApplied Surface Science·TypeComputational simulation/modeling·DateSep 20, 2021

An X-ray of the vending machines

A study by the University of the Basque Country analyzed the nutritional profile and level of processing of food products sold in vending machines. The results show that 48.6% of the products were classified as low-quality, while 73.8% were ultra-processed.

SourceUniversity of the Basque Country·JournalInternational Journal of Environmental Research and Public Health·DateSep 20, 2021

Coral reef biodiversity predicted to shuffle rather than collapse as climate changes

Researchers at the University of Hawaii found that coral reef community structure changes in response to ocean warming and acidification, but total biodiversity remains stable. The tiny organisms living within the reef matrix, known as cryptobiota, play a crucial role in nutrient cycling and food web dynamics.

SourceUniversity of Hawaii at Manoa·JournalProceedings of the National Academy of Sciences·TypeExperimental study·DateSep 20, 2021

2021 Farinella Prize awarded to Diana Valencia and Lena Noack

Physicist Diana Valencia and planetary scientist Lena Noack were awarded the 2021 Paolo Farinella Prize for their significant contributions to understanding terrestrial and super-Earth exoplanets. Their work has led to a deeper understanding of Earth-like exoplanet composition and evolution, critical for assessing habitability.

How the pandemic has triggered a cycle of mental health struggles and physical inactivity

A large study reveals the pandemic exacerbates mental health challenges and hinders physical activity levels, particularly among lower-income households and those living in urban areas. The survey found that higher household income was associated with better mental health status and maintained physical activity levels.

SourceNorth Carolina State University·JournalPreventive Medicine Reports·TypeSurvey·DateSep 20, 2021

New method used to study how cancer cells are organized

Researchers at Uppsala University developed a new method to track individual cancer cells and their offspring over time. The study found that brain tumour cells are hierarchically organised, but with some degree of flexibility, and that drug treatment influences cell organisation. This breakthrough may lead to the development of target...

SourceUppsala University·JournalMolecular Systems Biology·TypeExperimental study·DateSep 20, 2021

Modern activities follow the contours of ancient Teotihuacan

A lidar mapping study of ancient Teotihuacan shows that the city's engineers reshaped the landscape for construction, rerouted rivers to align with astronomical significance, and identified hundreds of previously unknown architectural features. The study confirms how these modifications continue to influence modern activities in the area.

SourceUniversity of California - Riverside·JournalPLOS ONE·TypeImaging analysis·DateSep 20, 2021

Dangers of smoking during pregnancy

Researchers at McGill University found that smoking during pregnancy is associated with an increased risk of premature birth, low birth weight, and birth defects. The study, which examined over nine million deliveries, also discovered that smoking mildly decreases the risk of preeclampsia.

SourceMcGill University·JournalJournal of Perinatal Medicine·TypeData/statistical analysis·DateSep 20, 2021

Diabetes medications linked to glaucoma prevention

Researchers found that GLP-1 receptor agonist medications, such as Trulicity and Rybelsus, reduced the risk of glaucoma in diabetic patients by approximately half. The study analyzed data from over 5,000 patients and showed a significant decrease in new glaucoma diagnoses among those taking these medications.

SourceUniversity of Pennsylvania School of Medicine·JournalBritish Journal of Ophthalmology·TypeData/statistical analysis·DateSep 20, 2021

Multimedia helps increase uptake of sustainable agricultural intensification in four African countries

A multimedia approach to extension services has increased the uptake of Sustainable Agricultural Intensification (SAI) in Ghana, Nigeria, Tanzania, and Uganda. The ASHC campaigns employed a mix of communication channels to promote SAI practices and technologies, resulting in at least 20% adoption among farmers exposed to the campaigns.

SourceCABI·JournalInternational Journal of Agricultural Sustainability·TypeNews article·DateSep 20, 2021

Augmented reality helps tackle fear of spiders

A new augmented reality app, Phobys, has been developed to help people reduce their fear of spiders through exposure therapy. The app uses a realistic 3D spider model projected into the real world and offers nine levels of training, with game elements to maintain motivation.

SourceUniversity of Basel·JournalJournal of Anxiety Disorders·DateSep 20, 2021

Modern simulations could improve MRIs

Researchers at Rice University have refined models to analyze gadolinium-based contrast agents, which are used in 40% of MRIs worldwide. The team's goal is to design better and more customizable contrast agents that improve image quality while minimizing risks.

SourceRice University·JournalPhysical Chemistry Chemical Physics·TypeComputational simulation/modeling·DateSep 20, 2021

Students’ certainty about belonging and their performance in a STEM course reinforce each other – for better or worse

A new study from the University of Utah finds that students' uncertainty about belonging in a STEM course reinforces each other, affecting midterm scores and persistence in the field. Women students experience higher belonging uncertainty than men, despite similar academic preparation.

SourceUniversity of Utah·JournalJournal of Chemical Education·TypeObservational study·DateSep 20, 2021

Autistic individuals are more likely to be LGBTQ+

A new study from the University of Cambridge suggests that autistic adults are less likely to identify as heterosexual and more likely to experience a diverse range of sexual orientations. The research found no differences in likelihood of contracting STIs or age of first sexual activity between autistic and non-autistic individuals.

SourceUniversity of Cambridge·JournalAutism Research·TypeSurvey·DateSep 20, 2021

New NIH research study to investigate psychosocial determinants of cardiovascular disease risk among urban African American adults

A new NIH-funded study aims to identify the psychosocial factors that contribute to high cardiovascular disease risk among urban African American adults. The research, led by Wayne State University, will explore how stressors like racial discrimination and social isolation impact health behaviors and disease progression.