Muscles have been grown that respond to light of a specific wavelength. Free Technical Library News

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Muscles are grown that react to light of a certain wavelength

28.03.2016

Scientists at the University of Illinois have created a modified muscle tissue that is able to contract in response to exposure to light. The researchers managed to achieve not only a short contraction, but also temporary muscle tension.

It was possible to create such tissue thanks to genetics. Mouse muscle tissue cells were taken as a basis with the addition of a gene of a certain type of algae, which causes sensitivity to light. In this case, to a certain wavelength of blue.

The skeleton was 3D printed. The muscles themselves, as you can see, are in the form of rings. This allows you to use such muscles as a kind of modules. Together with the 3D printing of the skeleton, this opens up quite wide opportunities for creating biorobots.

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New video discs store up to four hours of video on each side 29.03.2000

In 2001, new videodiscs will be available for sale, which can record up to four hours of video on one side.

The currently offered DVD-RAM discs allow you to record up to two hours of information on one side. New video discs are coated with a dosed mixture of antimony, germanium and tellurium.

When recording or rewriting (up to 1000 times without quality degradation), the laser beam melts the composition, orients the crystals, which then harden. During playback, a beam of lower power reads digital information on the crystallized areas of the coating. In the new advanced technology, the disc is coated with two layers of compound, the top of which is transparent to the laser.

It is enough to concentrate the beam on the lower layer so that the recording goes to it, and then goes to the upper layer.

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