воскресенье, 14 октября 2018 г.

Targeting Zika Although it could easily be mistaken for a work…


Targeting Zika


Although it could easily be mistaken for a work of art, this image is actually showing you a sample of human immune cells (blue), some of which are invested with the Zika virus (red). The virus affects many different cells, but how it damages and kills them isn’t clear. Researchers recently developed a new method to label Zika-infected immune cells. By separating infected from uninfected cells in the same sample, the team can compare the two directly and by looking at the differences, understand what the virus is doing. The technique provides a comprehensive account of the effect Zika is having on immune cells, in particular how it prevents them from activating certain genes that would enhance the body’s immune defence. In future, this method could be applied to tag cells infected with other viruses.


Written by Gaëlle Coullon



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2018 October 14 Orion in Red and Blue Image Credit &…


2018 October 14


Orion in Red and Blue
Image Credit & Copyright: David Lindemann


Explanation: When did Orion become so flashy? This colorful rendition of part of the constellation of Orion comes from red light emitted by hydrogen and sulfur (SII), and blue-green light emitted by oxygen (OIII). Hues on the featured image were then digitally reassigned to be indicative of their elemental origins – but also striking to the human eye. The breathtaking composite was painstakingly composed from hundreds of images which took nearly 200 hours to collect. Pictured, Barnard’s Loop, across the image bottom, appears to cradle interstellar constructs including the intricate Orion Nebula seen just right of center. The Flame Nebula can also be quickly located, but it takes a careful eye to identify the slight indentation of the dark Horsehead Nebula. As to Orion’s flashiness – a leading explanation for the origin of Barnard’s Loop is a supernova blast that occurred about two million years ago.


∞ Source: apod.nasa.gov/apod/ap181014.html


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