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Thijs Versloot

Regrowing limbs of mice #CELL - 0 views

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    By reactivating a dormant gene called Lin28a, which is active in embryonic stem cells, researchers were able to regrow hair and repair cartilage, bone, skin and other soft tissues in a mouse model.
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    regrow hair???!!!??? :-)
hannalakk

Need hair? Press "print" | MIT News - 1 views

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    "Media Lab's technique opens new frontier in 3-D printing."
Tom Gheysens

Fur and feathers keep animals warm by scattering light - 1 views

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    In work that has major implications for improving the performance of building insulation, scientists at the University of Namur in Belgium and the University of Hassan I in Morocco have calculated that hairs that reflect infrared light may contribute significant insulating power to the exceptionally warm winter coats of polar bears and other animals.
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    That's quite interesting. Maybe the future of buildings and spacecraft is furry?
Tobias Seidl

Self-assembled artificial cilia - PNAS - 1 views

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    Cilia are hairs driven by molecular motors. They are found in monocellular organisms, etc. If we can build such things artificially, we have micro-pumps etc. Any space usability?
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    carlo's distributed actuator study originally considered cilia as well as peristaltic motion if i remember right. i suppose you might still think about debris transport for digging applications. Originally there was an idea for thermal transport aswell which, it turns out, was bollocks.
johannessimon81

Bacteria grow electric wire in their natural environment - 1 views

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    Bacterial wires explain enigmatic electric currents in the seabed: Each one of these 'cable bacteria' contains a bundle of insulated wires that conduct an electric current from one end to the other. Cable bacteria explain electric currents in the seabed Electricity and seawater are usually a bad mix.
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    WOW!!!! don't want to even imagine what we do to these with the trailing fishing boats that sweep through sea beds with large masses .... "Our experiments showed that the electric connections in the seabed must be solid structures built by bacteria," says PhD student Christian Pfeffer, Aarhus University. He could interrupt the electric currents by pulling a thin wire horizontally through the seafloor. Just as when an excavator cuts our electric cables. In microscopes, scientists found a hitherto unknown type of long, multi-cellular bacteria that was always present when scientists measured the electric currents. "The incredible idea that these bacteria should be electric cables really fell into place when, inside the bacteria, we saw wire-like strings enclosed by a membrane," says Nils Risgaard-Petersen, Aarhus University. Kilometers of living cables The bacterium is one hundred times thinner than a hair and the whole bacterium functions as an electric cable with a number of insulated wires within it. Quite similar to the electric cables we know from our daily lives. "Such unique insulated biological wires seem simple but with incredible complexity at nanoscale," says PhD student Jie Song, Aarhus University, who used nanotools to map the electrical properties of the cable bacteria. In an undisturbed seabed more than tens of thousands kilometers cable bacteria live under a single square meter seabed. The ability to conduct an electric current gives cable bacteria such large benefits that it conquers much of the energy from decomposition processes in the seabed. Unlike all other known forms of life, cable bacteria maintain an efficient combustion down in the oxygen-free part of the seabed. It only requires that one end of the individual reaches the oxygen which the seawater provides to the top millimeters of the seabed. The combustion is a transfer of the electrons of the food to oxygen which the bacterial inner wires manage over centimeter-long distances. However, s
Ma Ru

Blondes are not dumb after all, researchers claim - 4 views

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    Once more, science at the service of humankind...
dejanpetkow

Torsional Carbon Nanotube Artificial Muscles - 0 views

  • Actuator materials producing rotation are rare and demonstrated rotations are small, though rotary systems like electric motors, pumps, turbines and compressors are widely needed and utilized. Present motors can be rather complex and, therefore, difficult to miniaturize. We show that a short electrolyte-filled twist spun carbon nanotube yarn, which is much thinner than a human hair, functions as a torsional artificial muscle in a simple three-electrode electrochemical system, providing a reversible 15,000° rotation and 590 revolutions/minute. A hydrostatic actuation mechanism, like for nature’s muscular hydrostats, explains the simultaneous occurrence of lengthwise contraction and torsional rotation during the yarn volume increase caused by electrochemical double-layer charge injection. Use of a torsional yarn muscle as a mixer for a fluidic chip is demonstrated.
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    I have no access to the pdf, but abstract sounds interesting.
Thijs Versloot

Scientists have developed a material so dark that you can't see it... - 7 views

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    A British company has produced a "strange, alien" material so black that it absorbs all but 0.035 per cent of visual light, setting a new world record. To stare at the "super black" coating made of carbon nanotubes - each 10,000 times thinner than a human hair - is an odd experience.
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    Finally! Nowadays blacks were always too bright for my taste...
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    "No matter how fast light travels, it finds the darkness has always got there first, and is waiting for it." I will keep waiting for my darkness-emitting diodes...
jcunha

Silicon chip with integrated laser: Light from a nanowire - 2 views

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    A nanolaser, a thousand times thinner than a human hair.
Nicholas Lan

The Future… One Hundred Years Ago - 13 views

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    one of these again. french illustrations from 1910 of life in the year 2000. some pleasingly close. a lot of flying and robots. some inexplicable (bunch of people staring at a horse). some bmi.
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    I like them again and again ....
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    what would be todays equivalents?
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    Ha! The one about the horse is that "in 100 years there will be people who've never seen a live horse in their lives" :-) Actually it's more than true now with children asking my mother who works in the school "so, do those kangaroos really exist"? Children are fed with so much realistic BS on TV (dinosaur parks etc.) that they can hardly tell the difference between fiction and reality. If you already have offspring: have they seen, say, a live cow or chicken already? (This is most probably a reference to the quote: "Horse is as everyone can see")
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    >what would be todays equivalents? Hmmm... what about technology forecasts?
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    ah. that makes sense. what about the one where they're having dinner then?
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    No idea... another one I don't get is the one with the waiter presenting some small black-white thing to the white hair guy on a chair.
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    love the clockwork orange one
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