Science and Technology News

Science Journals RSS Feeds

Sponsored Links

Recent Comments

    Get over it? When it comes to recycled water, consumers won’t

    If people are educated on recycled water, they may come to agree it’s perfectly safe and tastes as good—or better—than their drinking water. They may even agree it’s an answer to the critical water imbalance in California, where the northern third of the state holds 75% of the water despite 80% of the demand coming from the southern two-thirds. …read more

    Source:: Physorg Latest

          

    Potato virus Y is the most serious threat to potato—some strains more than others

    Potato virus Y (PVY) is the most serious problem facing the potato industry in the United States and is the main cause for rejection of seed potato lots. The virus affects potatoes in two ways: It reduces the yield of potato tubers by 70-80% and also negatively affects the quality of the remaining tubers due to necrotic reactions. …read more

    Source:: Physorg Latest

          

    How LISA pathfinder detected dozens of ‘comet crumbs’

    LISA Pathfinder, a mission led by ESA (the European Space Agency) that included NASA contributions, successfully demonstrated technologies needed to build a future space-based gravitational wave observatory, a tool for detecting ripples in space-time produced by, among other things, merging black holes. A team of NASA scientists leveraged LISA Pathfinder’s record-setting sensitivity for a different purpose much closer to home—mapping microscopic dust shed by comets and asteroids. …read more

    Source:: Physorg Latest

          

    Blowing bubbles: Scientist confirms novel way to launch and drive current in fusion plasmas

    An obstacle to generating fusion reactions inside facilities called tokamaks is that producing the current in plasma that helps create confining magnetic fields happens in pulses. Such pulses, generated by an electromagnet that runs down the center of the tokamak, would make the steady-state creation of fusion energy difficult to achieve. To address the problem, physicists have developed a technique known as transient coaxial helicity injection (CHI) to create a current that is not pulsed. …read more

    Source:: Physorg Latest

          

    Liberal or conservative? CEOs’ political leanings skew firms’ logic in structuring initial pay packages, study shows

    When firms design the initial pay package for a new CEO, they focus on that person’s tolerance or aversion to risk-taking. Research and corporate governance practices generally recommend compensating a risk-averse CEO with more performance-based pay to incentivize risk taking. …read more

    Source:: Physorg Latest

          

    Super‐Resolution Microscopy Reveals Shape and Distribution of Dislocations in Single‐Crystal Nanocomposites

    A non‐destructive strategy for visualizing dislocations in large synthetic crystals is presented. Using single crystals of calcite containing quantum dots as a model system it is demonstrated that the nanoparticles form an atmosphere around the dislocations, enabling their visualisation using three‐dimensional stochastic optical reconstruction microscopy (STORM).

    Abstract

    With their potential to offer new properties, single crystals containing nanoparticles provide an attractive class of nanocomposite materials. However, to fully profit from these, it is essential that we can characterise their 3D structures, identifying the locations of individual nanoparticles, and the defects present within the host crystals. Using calcite crystals containing quantum dots as a model system, we here use 3D stochastic optical reconstruction microscopy (STORM) to locate the positions of the nanoparticles within the host crystal. The nanoparticles are shown to preferentially associate with dislocations in a manner previously recognised for atomic impurities, rendering these defects visible by STORM. Our images also demonstrate that the types of dislocations formed at the crystal/substrate interface vary according to the nucleation face, and dislocation loops are observed that have entirely different geometries to classic misfit dislocations. This approach offers a rapid, easily accessed, and non‐destructive method for visualising the dislocations present within crystals, and gives insight into the mechanisms by which additives become occluded within crystals.

    …read more

    Source:: Angewandte Chemie Int. edition

          

    Sponsored Links

    Archives

    Copyright © 2013. All Rights Reserved.