What is a mistral? Detailed answer

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What is a mistral? Detailed answer

Big encyclopedia for children and adults

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What is a mistral?

This is a cold wind that comes from the north through the Rhone valley to the western Mediterranean, in particular to the Côte d'Azur near Nice.

Author: Mendeleev V.A.

Random interesting fact from the Great Encyclopedia:

What is a summer day and a tropical day?

Meteorologists call a summer day one during which the air temperature rises above 25 ° C, and a tropical day is one when the air temperature does not fall below 30 ° C.

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Forest of white pipes 26.02.2010

Michigan scientists have grown nanotubes from boron nitride. White boron nitride nanotubes differ from the more well-known black carbon nanotubes not only in color, but also in properties. For example, heating up to 1100 ° C is beyond their control.

The electrical properties of nitride tubes are also good, with the help of doping they can easily be turned into a semiconductor and used for power electronics. Their hydrophobicity is also very high - a coating of such nanotubes will have a lotus effect, and if it is applied to glass, it will retain transparency. However, it is not easy to obtain tubes from boron nitride: they grow unstable, and the components are poisonous, and the temperature is high, and they readily absorb impurities.

Scientists from the Michigan Technological University, led by Associate Professor Ek Kin Yap, coped with these problems and grew a forest of more or less identical boron nitride nanotubes on a substrate. The mechanism of their growth is similar to carbon ones, that is, one cannot do without a catalyst - in the experiment of Ek Kin Yap it was magnesium oxide with iron and nickel. Since nanotubes only grow where there is a catalyst, many different patterns can be created from them.

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