воскресенье, 26 мая 2019 г.

Lens Cleaner Anyone who uses contact lenses knows that you…


Lens Cleaner


Anyone who uses contact lenses knows that you need to clean them each night with a sterilising solution. This stops any unwanted micro-menaces infecting your eyes via the lenses, but there are some threats that can survive even this treatment. Acanthamoeba castellanii is an amoeba species that can cause keratitis and blindness, and is a growing threat in some countries. To develop treatments or preventions, researchers need to know more about its structure, so tracked three key proteins and their places in the developing amoeba cell walls. By variably staining the different proteins at different periods of growth (pictured at the second, third, and mature stage), they could pinpoint each protein’s position in the inner and outer wall, and conjoining structures. The wall is a key factor in the bugs’ resistance to both lens solution and antibiotics, so understanding how its built might help develop treatments to exploit any weaknesses.


Written by Anthony Lewis



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Make like a banana….Image of the Week — May 27,…


Make like a banana….Image of the Week — May 27, 2019


CIL:7245 — http://www.cellimagelibrary.org/images/7245


Description: HeLa cell in cytokinesis was fixed and stained for microtubules (green), RacGAP1 (red), and DNA (blue). Cells were fixed with MeOH on ice for 3 min, and stained with a primary antibody against RacGAP1 (Rac GTPase-activating protein 1), TOPRO3 (Invitrogen) for DNA, and FITC-DM1a antibody against microtubules. Secondary antibody was Alexa 594 for RacGAP1. 


Author: Chi-Kuo Hu


Licensing: Public Domain: This image is in the public domain and thus free of any copyright restrictions. However, as is the norm in scientific publishing and as a matter of courtesy, any user should credit the content provider for any public or private use of this image whenever possible.


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2019 May 26 A Solar Prominence Eruption from SDO Image Credit…


2019 May 26


A Solar Prominence Eruption from SDO
Image Credit & Copyright: NASA/Goddard/SDO AIA Team


Explanation: One of the most spectacular solar sights is an erupting prominence. In 2011, NASA’s Sun-orbiting Solar Dynamic Observatory spacecraft imaged an impressively large prominence erupting from the surface. The dramatic explosion was captured in ultraviolet light in the featured time lapse video covering 90 minutes, where a new frame was taken every 24 seconds. The scale of the prominence is huge – the entire Earth would easily fit under the flowing curtain of hot gas. A solar prominence is channeled and sometimes held above the Sun’s surface by the Sun’s magnetic field. A quiescent prominence typically lasts about a month, and may erupt in a Coronal Mass Ejection (CME) expelling hot gas into the Solar System. The energy mechanism that creates a solar prominence is still a topic of research. After our Sun passes the current Solar Minimum, solar activity like eruptive prominences are expected to become more common over the next few years.


∞ Source: apod.nasa.gov/apod/ap190526.html


Reviving the Shriveled Lake UrmiaOnce the second-largest…


Reviving the Shriveled Lake Urmia


Once the second-largest saltwater lake in the Middle East, Lake Urmia attracted birds and bathers to bask in its turquoise waters in northwest Iran. Then beginning in the 1970s, nearly three decades of drought and high water demands on the lake shriveled the basin, shrinking it by 80 percent. Recent torrential rains have replenished the water levels of this aquatic gem once known as “the turquoise solitaire of Azerbaijan.”


The animation above shows Lake Urmia on April 9, 2018, and April 12, 2019. The images were acquired by the Moderate Resolution Imaging Spectroradiometer (MODIS) on our Terra satellite. Officials report that the lake’s surface area reached roughly 3,000 square kilometers (1,200 square miles) in April 2019—expanding its volume nearly two-fold from a year ago.


Read more about Lake Urmia here.


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