科学与环境
Molecular sensor makes invisible traces of mercury easier to see
来源: Phys.org - latest science and technology news stories · 发布于
Mercury contamination presents an obvious challenge: it is invisible. A glass of water or a piece of fruit can seem perfectly normal to the naked eye, even when trace amounts of toxic mercury are present. Detecting such minute levels usually requires specialized laboratory tools
Mercury contamination presents an obvious challenge: it is invisible. A glass of water or a piece of fruit can seem perfectly normal to the naked eye, even when trace amounts of toxic mercury are present. Detecting such minute levels usually requires specialized laboratory tools and trained experts.
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Scientists shrink Archimedes’ screw to the size of a single molecule
Scientists have built a groundbreaking molecular motor that spins in either direction using electricity, inspired by a machine invented more than 2,000 years ago. Even more remarkably, its rotation can boost electrical conductivity by up to 100 times, potentially transforming the
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Common ADHD classroom accommodations may not help students succeed, study finds
Extra time on assignments. Frequent breaks. A quiet place to work. For students with attention-deficit/hyperactivity disorder (ADHD), these are some of the most common accommodations schools provide to make learning easier. But are they actually helping children succeed? A new st
Phys.org - latest science and technology news stories ·
Happy face, angry voice: Human–dog interaction study tracks conflicting cues
Dogs, having lived alongside humans for tens of thousands of years, are keenly tuned in to our emotions. Behavioral experiments, brain studies and even measurements of heart rate all suggest dogs respond differently depending on the emotional expressions they encounter in humans.
Phys.org - latest science and technology news stories ·
A perfect couple: Chromium keeps ruthenium grounded in water electrolysis
They say opposites attract, and many couples do fit this pattern. One is pragmatic and down-to-earth, while the other is a dreamer with their head in the clouds. Yet, these differences make them perfect for each other. According to researchers at ICFO, chemical interactions betwe
Phys.org - latest science and technology news stories ·
A newly discovered South African dinosaur was a heavyweight even as a youngster
It probably walked on two legs and weighed about 400 kilograms (880 pounds), despite still being a youngster. Meet Nyana rooiwalensis, a newly identified dinosaur species that lived more than 200 million years ago in what is now South Africa.
Phys.org - latest science and technology news stories ·