Careless. Meaning, origin, examples of the use of phraseological units

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Winged words, phraseological units. Meaning, history of origin, examples of use

Winged words, phraseological units

Directory / Winged words, phraseological units

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Careless

Proverbs and sayings

Phraseologism: Careless.

Meaning: 1. One who does not worry about anything, carefree. 2. Flowing without worries, sadness.

Origin: It is possible to understand why this word means "carefree" only if we turn to the Old Russian language. And it turns out that our ancestors, in addition to the word "oven", there was a very similar "oven", but its meaning was completely different - "care", something that worries, "bakes", scorches the soul. Therefore, "careless" is a person who lives without "peki", nothing "bakes" him. The Old Russian word "furnace" became the basis for such nouns as "guardianship", "sadness" and even "liver".

Random phraseology:

The powers that be.

Meaning:

About leadership, government, administration, bosses of all kinds (iron.).

Origin:

The expression from the Epistle of the Apostle Paul to the Romans (13, 1-5) about obedience to the authorities: "Let every soul obey those in power, for there is no power except from God." According to the church-glory. the word "possessing" means: having the highest authority.

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Technology at the tip of a golden hair 23.10.2006

Scientists from the USA figured out how to add a single molecule of a substance to the reactor, and at a strictly defined moment.

"Chemists have known for a long time that it is technically possible to control the release of individual molecules of drugs or reagents, but no one has tried to implement this idea. We have brought it to the end," says Professor Peter Searson from Johns Hopkins University. He and his colleagues specialize in growing nanowires from various metals using photolithography methods.

In this case, two pure gold electrode wires were needed. A long hydrocarbon molecule was attached to one of them using a gold-sulfur bond. A biomolecule was attached to the other end of the molecule, which needed to be introduced into the reactor at the right time.

When this moment came, a short current pulse was passed through the electrodes, the bond between gold and sulfur was broken and the molecule set off to float freely. After that, you can attach a new molecule to the electrode and repeat everything from the beginning.

"Our system is quite suitable for implantable chips, which ensure the timely release of drugs into the human body," says Professor Searson. "It will also help to carry out chemical reactions with extremely small amounts of a substance."

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