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The micro-and nanotubes are produced by the technology of the bracing-driven rolling up of thin layers of titanium, iron and platinum. Thin layers are deposited on surfaces that the layers are under extremely high mechanical tension. During detachment of the layers a portion of the strain energy is released, so that the layer rolls up or deformed. In this way, nano-and micro-tubes with great precision in certain diameters and different materials are made from very reproducible.

Part of the X chromosome comes from Homo sapiens and Neanderthal man and is found only among people outside of Africa, says an international team of researchers.

A sequence found in all regions except sub-Saharan Africa

The comparison between human DNA and that of Neanderthal man, recently deciphered (1) , showed that there had been a cross between these two species and that Homo Sapiens have fond memories in their genome since it would consist of 1 to 4% of Neanderthal DNA (see A bit of Neanderthal in us ). But new analyzes begin to indicate how, when and where were able to achieve these inclusions, confirming the work of the team Svante Pablo (Max Planck Institute in Leipzig, Germany).