Pliny the Elder. The most famous aphorisms

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APHORISMS OF FAMOUS PEOPLE
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Aphorisms of famous people. Pliny the Elder

Aphorisms of famous people

Free library / Aphorisms of famous people

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Pliny the Elder. The most famous aphorisms

The culprit of most human misfortunes is man.
Always act in such a way that you do not lose the love of your neighbor.
How many things were considered impossible until they were done.
It can be said with certainty that nothing is certain.
We are denied a long life, let us leave the works that will prove that we lived!
Not a day without a line.
The one who runs falls. He who crawls does not fall.
It is ridiculous to believe that the ancestor of all things, whoever or whatever he may be, can care about human affairs.
Fortune loves the brave.

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Liquid crystal current transmission cable 08.10.2019

Researchers from the Institute of Organic Chemistry at the Johannes Gutenberg University of Mainz (JGU, Germany) have synthesized new liquid crystals that can serve as a material for a liquid crystal "cable" and provide targeted transmission of electricity in electronic components.

Liquid crystals are a phase state of a substance that occupies an intermediate position between the solid and liquid states. In a liquid, the molecules "float" randomly, and in liquid crystals they are arranged in a certain order, as in ordinary crystal lattices, but the material still remains liquid. Such crystals are used in TV screens, smartphones and calculators.

Researchers from the Institute of Organic Chemistry at the Johannes Gutenberg University of Mainz have found another use for this liquid crystal substance - the transmission of current.

“If you cool our liquid crystal materials slowly, the molecules will self-assemble into columns,” explained Professor Heiner Detert of JGU. “We can think of these columns as many layers stacked one on top of the other. that these columns conduct electrical energy along their entire length." While most materials conduct positive charges, liquid crystal molecules conduct electrons. An additional advantage of the liquid crystal "cable" is that if it breaks, it will fully recover on its own.

The researchers found a particularly interesting effect that appears in their synthesized molecules: if one molecule is exposed to ultraviolet light, it begins to glow in response. If you add a few more to it, the effect disappears, and reappears when the number of molecules continues to increase. If the molecules are suspended in a solvent (that is, made into a liquid mixture with solid particles evenly distributed in the liquid) or placed on a film, they will glow in different colors when exposed to ultraviolet light.

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