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Why the world is running out of sand

November 25th, 2019 at 5:05 pm » Comments Off

It may be little more than grains of weathered rock, and can be found in deserts and on beaches around the world, but sand is also the world’s second most consumed natural resource. A South African entrepreneur shot dead in September. Two Indian villagers killed in a gun battle in August. A Mexican environmental activist […]



Multimaterial 3-D printing manufactures complex objects, fast

November 22nd, 2019 at 12:38 pm » Comments Off

Multimaterial multinozzle 3D printheads. Credit: Nature (2019). DOI: 10.1038/s41586-019-1736-8 3-D printers are revolutionizing manufacturing by allowing users to create any physical shape they can imagine on-demand. However, most commercial printers are only able to build objects from a single material at a time and inkjet printers that are capable of multimaterial printing are constrained by […]



Scientists develop superfast-charging, high-capacity potassium batteries

November 19th, 2019 at 12:10 pm » Comments Off

Skoltech researchers in collaboration with scientists from the Institute for Problems of Chemical Physics of RAS and the Ural Federal University have shown that high-capacity, high-power batteries can be made from organic materials without lithium or other rare elements. In addition, they demonstrated the impressive stability of cathode materials and recorded high energy density in […]



Engineer finds way to pull diseases from blood using magnets

November 19th, 2019 at 12:06 pm » Comments Off

“IN THEORY, YOU CAN GO AFTER ALMOST ANYTHING. POISONS, PATHOGENS, VIRUSES, BACTERIA…” A British engineer has found a way to filter unwanted cells from blood using magnets — and his tool could be used in clinical trials as soon as next year. Thanks to existing research, biochemical scientist George Frodsham knew it was possible to […]



Porous polymer coatings dynamically control light and heat

November 10th, 2019 at 5:12 pm » Comments Off

The porous polymer coatings, which switch from white to transparent when wetted, can be put into plastic enclosures to make panels that control light and temperatures of buildings. Credit: Jyotirmoy Mandal/Columbia Engineering Buildings devote more than 30% of their energy use to heating, cooling, and lighting systems. Passive designs such as cool roof paints have […]



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