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currentsinbiology:

World’s smallest propeller could be used for microscopic medicine
Scientists are working in their laboratories to create robots that are only nanometers — billionths of a meter — in length, small enough to maneuver inside the human body and possibly inside human cells. The impact of these miraculous microscopic machines on medicine can only be imagined, but there is no doubt that it will be significant.



One of the first steps in creating these robots is figuring out how to make them move. In a paper published in the June 2014 issue of ACS Nano, an Israeli and German team announced that they had succeeded in creating a tiny screw-shaped propeller that can move in a gel-like fluid, mimicking the environment inside a living organism.
Debora Schamel, Andrew G. Mark, John G. Gibbs, Cornelia Miksch, Konstantin I. Morozov, Alexander M. Leshansky, Peer Fischer. Nanopropellers and Their Actuation in Complex Viscoelastic Media. ACS Nano, 2014; 140624102214000 DOI: 10.1021/nn502360t
Tissue and biological fluids are complex viscoelastic media with a nanoporous macromolecular structure. Here, we demonstrate that helical nanopropellers can be controllably steered through such a biological gel. The screw-propellers have a filament diameter of about 70 nm and are smaller than previously reported nanopropellers as well as any swimming microorganism. We show that the nanoscrews will move through high-viscosity solutions with comparable velocities to that of larger micropropellers, even though they are so small that Brownian forces suppress their actuation in pure water. When actuated in viscoelastic hyaluronan gels, the nanopropellers appear to have a significant advantage, as they are of the same size range as the gel’s mesh size. Whereas larger helices will show very low or negligible propulsion in hyaluronan solutions, the nanoscrews actually display significantly enhanced propulsion velocities that exceed the highest measured speeds in Newtonian fluids. The nanopropellers are not only promising for applications in the extracellular environment but small enough to be taken up by cells.
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bunnyfood:

(Via bochinohito:Cutest Paw)
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wetheurban:


PHOTOGRAPHY: New Works by Oleg Oprisco
Ukrainian artistic photographer from Kiev, Oleg Oprisco, creates portraits that I consider truly exceptional – each image has its own atmosphere, and calls on each sense to awaken and become a part of his work.
Read More
wetheurban:


PHOTOGRAPHY: New Works by Oleg Oprisco
Ukrainian artistic photographer from Kiev, Oleg Oprisco, creates portraits that I consider truly exceptional – each image has its own atmosphere, and calls on each sense to awaken and become a part of his work.
Read More
wetheurban:


PHOTOGRAPHY: New Works by Oleg Oprisco
Ukrainian artistic photographer from Kiev, Oleg Oprisco, creates portraits that I consider truly exceptional – each image has its own atmosphere, and calls on each sense to awaken and become a part of his work.
Read More
wetheurban:


PHOTOGRAPHY: New Works by Oleg Oprisco
Ukrainian artistic photographer from Kiev, Oleg Oprisco, creates portraits that I consider truly exceptional – each image has its own atmosphere, and calls on each sense to awaken and become a part of his work.
Read More
wetheurban:


PHOTOGRAPHY: New Works by Oleg Oprisco
Ukrainian artistic photographer from Kiev, Oleg Oprisco, creates portraits that I consider truly exceptional – each image has its own atmosphere, and calls on each sense to awaken and become a part of his work.
Read More
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buttpoems:

a drawing about optimism
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Yeeah!
#HeIsLegend