Tuna knot. Travel Tips

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Tuna knot. Travel Tips

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Tuna knot other knots, it differs in that the eye of the hook wraps around two loops at the same time (as inblind loop). Although it is difficult to knit, it is considered the best of all fishing knots designed for synthetic line.

Rice. 129. Tuna knot

Author: Skryagin L.N.

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Conductive protein for 3D microarray assembly 13.02.2013

Three-dimensional microchips are considered the ideological heirs of modern "flat" microchips. It is believed that such devices will become more compact than their predecessors, and will have greater performance and less heat. The production of such devices has not yet been established due to the high cost of such chips and technological difficulties, as a result of which the percentage of yield of suitable crystals remains extremely low.

Manuel Thery from the University of Grenoble (France) and his colleagues have developed a cheap alternative to modern methods of assembling three-dimensional microchips, having learned how to manage the assembly of "biowires" from protein molecules. Scientists drew attention to the protein actin, the molecules of which form the "skeleton" of all cells in the human body. It is a water-soluble short chain of four hundred amino acids. When magnesium ions appear in solution, actin fragments quickly connect to each other, turning into strong polymer filaments.

Teri and his colleagues learned how to grow these filaments in the right parts of the “halves” of a three-dimensional chip by attaching special “seed” molecules to silicon wafers that caused the actin filaments to turn into a polymer without magnesium ions. These threads are intertwined with each other with a fairly small distance between the parts of the chip, forming strong "tunnels", the walls of which conduct current due to the gold atoms attached to them.

According to biotechnologists, this design conducts current no worse than "classic" metal contacts between layers of 3D chips. The low cost of protein molecules, the relative ease of their fabrication, and compatibility with other silicon microchip "growing" techniques make this technology a serious competitor for current XNUMXD microchip assembly methods.

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