Coward does not play hockey. Meaning, origin, examples of the use of phraseological units

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WINGED WORDS, 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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Coward does not play hockey

Dobronravov N.N.

Phraseologism: Coward does not play hockey.

Meaning: A call for decisive behavior, encouragement of a bold act, etc.

Origin: Title and line from a song written by composer Alexandra Pakhmutova based on poems by poets Sergei Grebennikov and Nikolai Dobronravov.

Random phraseology:

Do we not see every day the coffins, the gray hairs of the decrepit universe?

Meaning:

About the frailty of life, the transience of life.

Origin:

From the poem "Waterfall" (1791-1794) by Gavrila Romanovich Derzhavin (1743-1816).

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Random news from the Archive

Ultraviolet makes the brain smarter 23.05.2018

Ultraviolet radiation has its pros and cons. The disadvantages include the fact that it damages cellular DNA and can provoke skin cancer, among the pluses is that ultraviolet stimulates the appearance of vitamin D.

Researchers from the Science and Technology University of China have discovered another beneficial property of ultraviolet light - it stimulates the activity of neurons, helping the brain to learn. Studying the chemical composition of neurons, Wei Xiong and his colleagues suddenly noticed that among the "intraneuronal" molecules there is urocanic acid. This was strange, since it usually appears in response to UV radiation and can be found in skin cells; it exists in some other organs, for example, in the liver - but no one has ever seen urocanic acid in brain neurons.

Further experiments with mice showed that there was no mistake: shaved mice were irradiated for two hours with medium-wave ultraviolet, or ultraviolet B (the dose of radiation approximately corresponded to that received by a person with a sunburn) - and urocanic acid did appear in the brains of animals.

But if in the skin it is needed in order to absorb ultraviolet radiation and thereby protect cells from damage and mutation, then why is it needed in the brain? It is known about urocanic acid that it appears when the amino acid histidine is converted into glutamic acid. As we know, glutamic acid, or glutamate, is one of the main neurotransmitters that helps transmit excitatory signals between neurons. And, as it turned out, in the brain tissues, after urocanic acid, the level of glutamate also increased.

It only remained to check how neurons in mice work after UV irradiation. As one would probably expect, those nerve cells that use glutamate as a neurotransmitter exchanged impulses with greater efficiency. And, most importantly, the irradiated mice had improved cognitive functions: they memorized some new information faster and learned what they should do faster - compared to those that were not irradiated with ultraviolet radiation. If the enzyme that converts urocanic acid into glutamic acid was turned off in neurons, then there was no stimulating effect from ultraviolet radiation, neither at the level of neuronal impulses, nor at the level of behavior.

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