source:natureHafnium isn’t a particularly remarkable element. It’s not your explosive sodium, shimmering mercury or stinky sulfur. It’s a greyish metal and is commonly used as a neutron absorber in the control rods of nuclear power plants and nuclear submarines, and as an insulator in computer chips. But hafnium’s discovery, which was reported in Nature a century ago this week1, was of disproportionate importance. The element was identified by two scientists working in Copenhagen: Dutch physicist Dirk Coster and Hungarian chemist Georg von Hevesy. The find secured not only the periodic table’s...
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source:mydrollIt’s “lights out” for antibiotic-resistant superbugs as next-generation light-activated nanotech proves it can eradicate some of the most notorious and potentially deadly bacteria in the world.Developed by the University of South Australia and published in Pharmaceutics, the new light therapy can eliminate antibiotic-resistant superbugs golden staph and Pseudomonas aeruginosa by 500,000-fold and 100,000-fold respectively.Golden staph (staphylococcus aureus) and Pseudomonas aeruginosa are among the most deadly superbugs in the world. Globally, about 1.27 million people die as a re...
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source:lva.lenovoBasalt is a type of volcanic rock that is formed when lava with a high content of mafic minerals (such as pyroxene and olivine) cools and solidifies. Basalt lava eruptions occur when this molten rock is erupted from a volcano and comes into contact with the Earth’s surface. These eruptions can be explosive, producing ash and tephra, or they can be more effusive, flowing slowly and steadily over long periods of time. Basalt lava is typically more fluid than other types of lava, which allows it to flow easily and cover large areas.n the past, massive magma eruptions have led to ...
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source：sciencedailyAn international team of researchers from Japan and Germany has developed a new system that upconverts blue LED light into high-energy Ultraviolet B, or UVB, light.As the system does not require any of the toxic and inefficient materials that are traditionally used for UVB production, it opens the door for applications using UVB that are more sustainable and eco-friendly. The results were reported in the journal Angewandte Chemie.It is hard to avoid talk about ultraviolet light -- especially during the summertime. These high-energy rays produced by the sun are outside the vi...
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2023
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