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Early detection of wood coating deterioration to better maintain wooden structures

From the Japanese cypress to the ponderosa pine, wood has been used in construction for millennia. Though materials like steel and concrete have largely taken over large building construction, wood is making a comeback, increasingly being used in public and multi-story buildings for its environmental benefits. Of course, wood has often been passed over in favor of other materials because it is easily damaged by sunlight and moisture when used outdoors. Wood coatings have been designed to protect wood surfaces for this reason, but coating damage often starts before it becomes visible. Once the deterioration can be seen with the naked eye, it is already too late. To solve this problem, a team of researchers is working to create a simple but effective method of diagnosing this nearly invisible deterioration before the damage becomes irreparable.

Extreme drought contributed to barbarian invasion of late Roman Britain, tree-ring study reveals

Three consecutive years of drought contributed to the 'Barbarian Conspiracy', a pivotal moment in the history of Roman Britain, a new study reveals. Researchers argue that Picts, Scotti and Saxons took advantage of famine and societal breakdown caused by an extreme period of drought to inflict crushing blows on weakened Roman defenses in 367 CE. While Rome eventually restored order, some historians argue that the province never fully recovered.

A new take on the abilities of hydrogen binding energy for use in single atom catalysts

Conventional thinking holds that the metal site in single atom catalysts (SACs) has been a limiting factor to the continued improvement of the design and, therefore, the continued improvement of the capability of these SACs. More specifically, the lack of outside-the-box thinking when it comes to the crucial hydrogen evolution reaction (HER), a half-reaction resulting in the splitting of water, has contributed to a lack of advancement in this field. New research emphasizes the importance of pushing the limits of the metal site design in SACs to optimize the HER and addressing the poisoning effects of HO* and O* that might affect the reaction. All of these improvements could lead to an improved performance of the reaction, which can make sustainable energy storage or hydrogen production more available.

Green hydrogen: A cage structured material transforms into a performant catalyst

Clathrates are characterized by a complex cage structure that provides space for guest ions too. Now a team has investigated the suitability of clathrates as catalysts for electrolytic hydrogen production with impressive results: the clathrate sample was even more efficient and robust than currently used nickel-based catalysts. They also found a reason for this enhanced performance. Measurements at BESSY II showed that the clathrates undergo structural changes during the catalytic reaction: the three-dimensional cage structure decays into ultra-thin nanosheets that allow maximum contact with active catalytic centers.

Curious isolation: New butterfly species discovered

A new butterfly species, Satyrium curiosolus, was discovered in a recent study at Blakiston Fan in Waterton Lakes National Park, Alberta. It has unique evolutionary history, having likely remained in isolation for up to 40,000 years, leading to flatlined genetic diversity and exceptionally high levels of inbreeding. Due to its specific ecological associations and low genetic diversity, this butterfly may soon face challenges with climate change adaptation and will require special conservation strategies.

Scientists 'hack' cell entry to supercharge cancer drugs

Scientists could reshape cancer treatment by helping powerful drugs work better in the body by exploiting a surface protein called CD36 that helps pull substances into cells. This dramatically improves the uptake of a promising class of cancer-fighting drugs called PROTACs. The new drug design deliveries up to 22 times more of he drug inside cancer cells, and tumor suppression in mice.
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