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Physicists have zoomed in on the transition that could explain why copper-oxides have such impressive superconducting powers.

Settling a 20-year debate in the field, they found that a mysterious quantum phase transition associated with the termination of a regime called the “pseudogap” causes a sharp drop in the number of conducting electrons available to pair up for superconductivity. The team hypothesizes that whatever is happening at this point is probably the reason that cuprates support superconductivity at much higher temperatures than other materials—about half way to .

“It’s very likely that the reason superconductivity grows in the first place, and the reason it grows so strongly, is because of that ,” CIFAR Senior Fellow Louis Taillefer (Université de Sherbrooke) says. The new findings are published in Nature.

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3D Printing hazardous to the environment due to toxins.

Three-dimensional (3D) printing, also known as additive manufacturing, refers to those technologies capable of developing 3D objects from raw materials, like metals and polymers based on computerized 3D parametric models.

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Breaking the bacteria barriers.

If that field is at just the right magnitude, it will open up pores within the cell membrane, through which DNA can flow. But it can take scientists months or even years to figure out the exact electric field conditions to reversibly unlock a membrane’s pores.

A new microfluidic device developed by MIT engineers may help scientists quickly home in on the electric field “sweet spot” — the range of electric potentials that will harmlessly and temporarily open up membrane pores to let DNA in. In principle, the simple device could be used on any microorganism or cell, significantly speeding up the first step in genetic engineering.

“We’re trying to reduce the amount of experimentation that’s needed,” said Cullen Buie, the Esther and Harold E. Edgerton Associate Professor of mechanical engineering at MIT. “Our big vision for this device and future iterations is to be able to take a process that usually takes months or years, and do it in a day or two.”

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Good news for chocolate lovers: eating the sweet treat has been found to have a positive association with cognitive performance, according to a new study.

Published in the journal Appetite, researchers used data collected from a Maine-Syracuse Longitudinal Study (MSLS), in which 968 people aged between 23 and 98 were measured for dietary intake and cardiovascular risk factors, as well as cognitive function.

The researchers found that regularly eating chocolate was significantly associated with cognitive function “irrespective of other dietary habits”.

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Your smartwatch screen may soon be rather more impressive: This 4.7-inch organic LCD display is flexible enough to wrap right around a wrist.

Produced by FlexEnable from the UK, the screen squeezes a full-color organic LCD onto a sheet that measures just one hundredth of an inch thick, which makes it highly conformable. The company claims that it can easily run vivid colour and smooth video content, which is a sight better than most wearables.

It’s not the first flexible display, of course. LG already has an 18-inch OLED panel that has enough flexibility to roll into a tube that’s an inch across. But this concept—which, sadly, is all it is right now—is the first large, conformable OLCD designed for wearables that we’ve seen.

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We’ve just wrapped up the second day of Mobile World Congress, the annual mobile technology conference in Barcelona. We’ve seen smartphones, VR headsets, and some batshit crazy stuff (see photo above)—and almost all of it has been awesome. Here are some of our favorites:

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UC Berkeley engineers created a “smart cap” using 3-D-printed plastic with embedded electronics to wirelessly monitor the freshness of milk (credit: Photo and schematic by Sung-Yueh Wu)

UC Berkeley engineers, in collaboration with colleagues at Taiwan’s National Chiao Tung University, have developed a 3D printing process for creating basic electronic components, such as resistors, inductors, capacitors, and integrated wireless electrical sensing systems.

As a test, they printed a wireless “smart cap” for a milk carton that detected signs of spoilage using embedded sensors.

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