Вопрос № 911572 - Английский язык

Vitamins are believed to belong to ancient elementary organic compounds and to exist before life originated on Earth. According to Academician Chagovets vitamins took part in the building up of a primary organism together with such “blocks” of living matter as nucleic acids, proteins, aminoacids.
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What do vitamins belong to?

Vitamins are believed to belong to ancient elementary organic compounds and to exist before life originated on Earth. According to Academician Chagovets vitamins took part in the building up of a primary organism together with such “blocks” of living matter as nucleic acids, proteins, aminoacids.
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What are vitamins essential for?
The vitamins as a class are not chemically related, and, they are classified according to their solubility and chief therapeutic effect into two groups: 1) water-soluble vitamins, 2) fat-soluble vitamin group. It is known to be essential for the maintenance of normal epithelial tissue.

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Where is the source of all vitamin A in?
Vitamin A is an unsaturated cyclic alcohol. It is synthesezed by at least three separate processes.
It has been concentrated and isolated from the non-saponiflable to be present in fish oil, both in the free alcohol and in the ester form. The source of all vitamin A is in the carotenoid pigments, the yellow-coloured, compounds occurring in all chlorophyll-containing plants.
In pure form it is a pale yellow oil, soluble in fat solvents, having an ultra-violet absorption spectrum. The ester forms of the vitamin have been found to possess greater stability than the free alcohol.

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What are Vitamin B1, Vitamin B2, Vitamin B6, Vitamin B12, Vitamin С and other stated to belong to?
Vitamin B1, Vitamin B2, Vitamin B6, Vitamin B12, Vitamin С and other are stated to belong to the water-soluble vitamin class. Vitamin B2 (riboflavine) is built up from a ribose and isoalloxazine residue, the name riboflavine being derived from the sugar component and the intense yellow fluorescence of it’s agucous solution.

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What is vitamin C essential for?
Vitamin С (ascorbic acid) is essential for the normal functioning of living cell and is involved in many enzymatic reactions. It is required for the development of cartilage, teeth and bones, for wound healing and aiding the absorption of iron from the intestin. Gross deficiency causes scurvy.