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Science News for May 28, 2020


Heart surgery stalled as COVID-19 spread

The COVID-19 pandemic has led to a significant reduction in cardiac surgeries worldwide, with an average of 50-75% decrease in procedures. Hospitals are now working to resume operations while protecting patients and staff from SARS-CoV-2. Experts have developed recommendations for safely resuming cardiac surgery activity.

SourceUniversity of Ottawa·JournalCirculation·DateMay 28, 2020

Two paths better than one for treating patients with heart stents

A recent study by cardiologists at the University of Alberta found that combining a blood-thinning drug rivaroxaban with aspirin daily reduces major adverse events and mortality rates in patients with chronic coronary disease who have had an angioplasty. The treatment was found to be significantly better than aspirin alone in preventin...

Stronger tropical cyclones strengthen the Kuroshio Current, further heating high latitudes

Intensifying tropical cyclones strengthen ocean eddies feeding the Kuroshio Current, accelerating it and transferring more heat energy to mid- and high-latitude ocean waters. This phenomenon highlights a positive feedback loop between TCs and climate warming, potentially impacting future climate predictions.

Student-school mismatch

Researchers found that up to 28% of students in Moscow chose a university below their academic ability, limiting life opportunities. The study highlights the impact of family background and parental influence on undermatching, with parents from lower socioeconomic status often advising less prestigious universities.

SourceNational Research University Higher School of Economics·JournalEuropean Journal of Education·DateMay 28, 2020

A single proton can make a heck of a difference

Researchers at RIKEN found that knocking out a single proton from a fluorine nucleus transforms it into a neutron-rich isotope of oxygen. This transformation has a significant effect on the state of the nucleus, defying conventional wisdom and sparking further investigation.

SourceRIKEN·JournalPhysical Review Letters·DateMay 28, 2020

'Bottom-heavy squirmers' adopt characteristic group behaviours

A team of scientists found that groups of living organisms that move through squirming exhibit distinct collective properties depending on their velocities and bottom-heaviness. These characteristics can lead to intriguing emergent behaviors, such as clusters forming at the bottom or top of a container.

SourceSpringer·JournalThe European Physical Journal E·DateMay 28, 2020

Imaging reveals unexpected contractions in the human placenta

High-resolution imaging of human placenta reveals uniform oxygenation levels and efficient blood flow, while also discovering rapid draining from veins and utero-placental pump contractions that facilitate better circulation and fetal growth. These findings improve placental models and optimize MRI protocols for better diagnosis.

SourcePLOS·JournalPLOS Biology·DateMay 28, 2020

Revealing how flies make decisions on the fly to survive

Researchers studied how hoverflies process visual information to control their flight movements, finding that descending neurons adapt like sensory neurons but also persistently fire like motor neurons. This unique integration of responses offers insights into the brain-behavior link in flies and potentially all vertebrates.

SourceFlinders University·JournalCurrent Biology·DateMay 28, 2020

Gold mining with mercury poses health threats for miles downstream

A study by Duke University scientists found that native communities hundreds of kilometers away from gold mining in the Peruvian Amazon have high levels of mercury exposure, leading to intellectual deficits and IQ losses. Children with higher mercury levels in their hair showed cognitive effects, even at lower exposure levels.

SourceDuke University·JournalJournal of Exposure Science & Environmental Epidemiology·DateMay 28, 2020

Exploiting viruses to attack cancer cells

Researchers at Hokkaido University have developed an adenovirus that specifically replicates in and kills cancer cells using RNA-stabilizing elements. The virus, AdARET, was found to be effective against a range of cancer types, including those without a mutated RAS gene.

SourceHokkaido University·JournalCancers·DateMay 28, 2020

Inequities in access to kidney transplantation exist even with universal healthcare

A new study found that patients with lower socioeconomic status and additional illnesses are less likely to be put on transplant waiting lists in the UK, despite universal healthcare. The study suggests that patient factors, such as age and health literacy, play a significant role in determining access to transplantation.

SourceAmerican Society of Nephrology·JournalClinical Journal of the American Society of Nephrology·DateMay 28, 2020

Climate could cause abrupt British vegetation changes

Research by the University of Exeter suggests that climate change could lead to sudden changes in British vegetation, particularly in regions with warmer and wetter conditions. This increase in plant growth is expected due to factors such as CO2 fertilization, but soil drying out can also cause rapid decreases in vegetation productivity.

SourceUniversity of Exeter·JournalGlobal Change Biology·DateMay 28, 2020

Modified Parkinson's drug shows potential in treating nonalcoholic fatty liver disease

Scientists from GIST developed a novel peripheral serotonin antagonist, which showed promising results in obese mice with impaired liver function. The compound improved symptoms of fatty liver disease and reduced body fat. Researchers hope the drug candidate will offer relief to patients with nonalcoholic fatty liver disease.

SourceGIST (Gwangju Institute of Science and Technology)·JournalJournal of Medicinal Chemistry·DateMay 28, 2020

Tackling airborne transmission of COVID-19 indoors

A study by the University of Surrey and Australian partners highlights the importance of adequate ventilation in indoor environments to prevent airborne transmission of COVID-19. Improving building ventilation is proposed as a key strategy to reduce the risk of infection, particularly in areas with high population densities.

SourceUniversity of Surrey·JournalCity and Environment Interactions·DateMay 28, 2020

New study: Stroke patients are significantly delaying treatment amid COVID-19

A new study published in the Journal of NeuroInterventional Surgery found that ischemic stroke patients are arriving at hospitals and treatment centers an average of 160 minutes later during the COVID-19 pandemic compared to a similar timeframe in 2019. This delay has severe consequences, including impacting survival and recovery.

SourceSociety of NeuroInterventional Surgery·JournalJournal of NeuroInterventional Surgery·DateMay 28, 2020

A small twist leads to a big reaction

Scientists at the University of Tokyo have discovered a way to speed up chemical reactions involving amide bonds, which are key components of proteins. By applying a slight twist to their structure, they increased reaction rates by up to 14 times, potentially benefiting medical research and drug development.

SourceUniversity of Tokyo·JournalNature Chemistry·DateMay 28, 2020

Researchers track how bacteria purge toxic metals

Researchers at Cornell University used single-molecule tracking and protein quantitation to study the mechanism of bacteria's resistance to toxic metals, revealing a complex series of steps that lead to detoxification. The discovery could lead to the development of more effective antibacterial treatments.

SourceCornell University·JournalProceedings of the National Academy of Sciences·DateMay 28, 2020

New view on how tissues flow in the embryo

Scientists at Columbia University developed a new method to analyze cell shapes in fruit fly embryos, revealing that tissues can behave like fluids during rapid changes. By combining experimental studies with theoretical modeling, the team found that anisotropy plays a crucial role in predicting tissue flow and elongation.

SourceColumbia University School of Engineering and Applied Science·JournalProceedings of the National Academy of Sciences·DateMay 28, 2020

Smart sponge could clean up oil spills

A Northwestern University-led team has developed a smart sponge that selectively soaks up oil in water, leaving clean water and unaffected marine life behind. The sponge can absorb more than 30 times its weight in oil and can be reused many dozens of times without losing effectiveness.

SourceNorthwestern University·JournalIndustrial & Engineering Chemistry Research·DateMay 28, 2020

As hospitals walk the tightrope of patient data-sharing, one system offers a new balance

A new framework published in NEJM offers a responsible approach to patient data-sharing, allowing companies to access massive data troves with transparency and consent. The system includes an easy-to-understand informed consent document and a dedicated gatekeeper committee to review and approve projects.

SourceMichigan Medicine - University of Michigan·JournalNew England Journal of Medicine·DateMay 28, 2020

Using electrical stimulus to regulate genes

Researchers at ETH Zurich create implant that uses electrical signals to stimulate insulin production in diabetic mice, offering potential breakthrough for real-time glycemic control. The system is designed to be connected to the internet and controlled via an app, paving the way for a more integrated approach to diabetes management.

SourceETH Zurich·JournalScience·DateMay 28, 2020

Yes, your dog wants to rescue you

A recent study by Arizona State University's Canine Science Collaboratory found that pet dogs will attempt to rescue their owners if they know how. Approximately one-third of the dogs in the experiment rescued their owners, suggesting that motivation alone is not enough, but rather a combination of understanding and ability are required.

SourceArizona State University·JournalPLOS ONE·DateMay 28, 2020

Who were the Canaanites? New insight from 73 ancient genomes

Researchers analyzed 73 ancient genomes and found that the Canaanites descended from a mixture of local Neolithic populations and Iranian/Caucasus-related ancestry. This study sheds light on the cultural and genetic similarity among city-states, and how migration from the northeast may have influenced the region's culture.

SourceCell Press·JournalCell·DateMay 28, 2020

Mapping immune cells in brain tumors

A study by researchers at the University of Zurich mapped immune cells in different types of brain tumors, revealing tumor-specific instructions for tissue-invasive leukocytes. The findings provide a basis for developing tailored immunotherapies for various types of brain tumors.

SourceUniversity of Zurich·JournalCell·DateMay 28, 2020