Liana knot. Tourist tips

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Liana knot. Tourist tips

Tourist tips

creeper knot, although not widely used in the navy, is one of the original and reliable knots for tying cables.

Rice. 42. Liane knot

This knot is unique in that, with a very simple weave, each end individually holds tightly with very strong traction and, moreover, it is very easy to untie after removing the load on the cable - just move any of the loops along the corresponding root end and the knot immediately crumbles. It does not slip on synthetic fishing line and can be successfully used by anglers.

Author: Skryagin L.N.

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Fuel from photosynthesis 29.12.2020

Professor of Energy in the Department of Chemistry and Chemical Biology Daniel Nocera and his colleagues at Harvard University have created two devices - an artificial leaf and a bionic leaf - that use solar energy to produce liquid fuel.

The artificial sheet is a silicon-based solar cell with various catalytic materials attached to both sides. When immersed in water, the device uses the energy of sunlight to split water into oxygen and hydrogen. The bionic leaf, thanks to the bacterium Ralstonia eutropha, absorbs carbon dioxide from the air and combines it with hydrogen, which produces artificial leaves. Liquid fuel is produced by artificial photosynthesis.

The scientist noted that in 2020, researchers replaced the bacterium with Xanthobacter autotrophicus. This allowed the development of a device that combines nitrogen from the air and hydrogen from an artificial leaf to make fertilizer.

He added that artificial photosynthesis is 10 times more efficient than natural. In 2021, the team plans to explore practical ways to expand the technology. In the short term, this will help develop a decentralized energy, food and production structure that is carbon neutral. For example, hydrogen is already being used to fuel some vehicles.

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The world is looking for ways to sustain life without fossil fuels, and artificial photosynthesis technology brings society one step closer to this goal, scientists are convinced.

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