Δευτέρα, 19 Μαΐου 2014

ScienceDaily: Most Popular News

ScienceDaily: Most Popular News


Fast and curious: Electrons hurtle into the interior of a new class of quantum materials

Posted: 16 May 2014 08:09 AM PDT

Scientists have made a step forward in developing a new class of materials that could be used in future technologies. They have discovered a new quantum effect that enables electrons -- the negative-charge-carrying particles that make today's electronic devices possible -- to dash through the interior of these materials with very little resistance.

Tricking the uncertainty principle: New measurement technique goes beyond the limits imposed by quantum physics

Posted: 16 May 2014 06:23 AM PDT

Today, we can measure the position of an object with unprecedented accuracy, but the uncertainty principle places fundamental limits on our ability to measure. Noise that results from of the quantum nature of the fields used to make measurements imposes what is called the 'standard quantum limit.' This background noise keeps us from knowing an object's exact location, but a recent study provides a solution for rerouting some of that noise away from the measurement.

First test of pluripotent stem cell therapy in monkeys is successful

Posted: 15 May 2014 09:32 AM PDT

For the first time in an animal that is more closely related to humans, researchers have demonstrated that it is possible to make new bone from stem-cell-like induced pluripotent stem cells (iPSCs) made from an individual animal's own skin cells. The study in monkeys also shows that there is some risk that those iPSCs could seed tumors, but that unfortunate outcome appears to be less likely than studies in immune-compromised mice would suggest.

Stability lost as supernovae explode

Posted: 15 May 2014 06:08 AM PDT

Exploding supernovae are a phenomenon that is still not fully understood. The trouble is that the state of nuclear matter in stars cannot be reproduced on Earth. Scientists have now developed a new model of supernovae represented as dynamical systems subject to a loss of stability, just before they explode. Because similar stability losses also occur in dynamical systems in nature, this model could be used to predict natural catastrophes before they happen.

Molecular motor for packaging virus DNA found, may lead to targeted antiviral drugs

Posted: 12 May 2014 12:50 PM PDT

New light has been shed on a type of molecular motor used to package the DNA of a number of viruses, including herpes and the adenoviruses. Their findings could help in the development of more effective drugs and inspire the design of new and improved synthetic biomotors. Viruses are the enigma of the biological world -- despite having their own DNA and being able to adapt to their environment and evolve, they are not considered to be alive like cells. In order to reproduce and multiply -- a requirement of "life" -- a virus must invade a living cell, eject its DNA into that of the cell, and commandeer the cell's biological machinery.

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