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Science News Archive 2019 - Page 331


Page 331 of 486

Alcohol relapse rate among liver transplant recipients identical regardless of sobriety period

Researchers at Johns Hopkins Medicine found that liver transplant recipients with alcoholic hepatitis have a comparable alcohol relapse rate regardless of their sobriety period. The study's outcomes support waiving the six-month sobriety requirement for selected patients, promoting equal access to lifesaving transplants.

SourceJohns Hopkins Medicine·JournalJournal of Intensive Care Medicine·DateApr 25, 2019

Developing a model critical in creating better devices

A new computational model developed by Preeya Achari predicts the behavior of water on the surface of hexagonal boron nitride, a compound used in cosmetic products. The model provides more control over devices made with this material and water, leading to improved performance.

SourceVirginia Tech·JournalComputational Materials Science·DateApr 25, 2019

Exercise activates memory neural networks in older adults

A new University of Maryland study reveals that acute exercise increases activation in the hippocampus and other key brain regions associated with memory. This finding suggests that single sessions of exercise can promote adaptations and improve network integrity, potentially reducing the risk of Alzheimer's disease.

SourceUniversity of Maryland·JournalJournal of the International Neuropsychological Society·DateApr 25, 2019

Bacteria uses viral weapon against other bacteria

Researchers discovered that certain bacteria use viruses to identify and kill rival bacteria for resources. The discovery has implications for synthetic biology and medicine, where understanding bacterial competition could lead to breakthroughs in treating infectious diseases.

SourcePenn State·JournalCell Reports·DateApr 25, 2019

Early, hormone-driven breast cancer is less likely to recur if treated with radiotherapy

Women with early, low-risk hormone-driven breast cancer who receive radiotherapy after surgery have a significantly lower risk of recurrence and improved disease-free survival compared to those without radiotherapy. The study found that whole breast irradiation is effective in reducing in-breast recurrences and improving overall survival.

Caffeine gives solar cells an energy boost

Scientists have discovered that caffeine can improve the performance and thermal stability of perovskite solar cells, increasing their efficiency from 17% to over 20%. The unique molecular structure of caffeine allows it to interact with perovskite precursors, giving this technology an edge on the market.

SourceCell Press·JournalJoule·DateApr 25, 2019

Using DNA templates to harness the sun's energy

A team of researchers at Arizona State University has made significant progress in optimizing artificial photosynthesis systems that mimic the first stage of photosynthesis. They have developed a way to use DNA to self-assemble structures that capture and transfer energy over long distances with high efficiency.

SourceArizona State University·JournalJournal of the American Chemical Society·DateApr 25, 2019

Healthy aging entails reorganization of function in prefrontal brain areas

Researchers analyzed 82 studies on working memory mechanisms in adults of different age groups. Meta-analyses showed that brain function decreases agreement with aging, suggesting functional reorganization in the prefrontal cortex. This changes may be a sign of compensatory function or increased variability in older adults.