Table salt - an important food additive, without which the preparation of many dishes. In this form of milled product has the form of fine white crystals. Various impurities in the salt composition of natural origin can give it grayscale.
Salt chemical structure is 97% of sodium chloride. Other names for this product - stone, dining room, or table salt, sodium chloride. In the industrial production of such varieties of salt obtained as treated or untreated, fine or coarse iodized, fluoridated, pure, sea salt.
The admixture of magnesium salts in the composition of salt gives it a bitter taste, and calcium sulfate - earthy.
Extract salt for many millennia. First, the method of receipt evaporation of sea water or brackish lake water, the burning of some plants. Now commercially develop deposits of salt on the site of the ancient seas dried up, getting her out of the mineral halite (rock salt).
In addition to direct use in food table salt is used as a safe and common preservative for food preservation as a component of the production of hydrochloric acid, soda. Properties of sodium chloride in the form of strong solution thereof in water has long been used for vydelyvaniya leathers.
The use of salt
In the body, salt is not formed, so must necessarily come from the outside, with food. Suction salt practically occurs in the small intestine. Deducing it from the body by means of the kidneys, intestines and sweat glands. Excessive loss of sodium and chlorine ions occurs when copious vomiting, severe diarrhea.
Salt is the main source for the body of sodium and chlorine, which are contained in all the organs and tissues. These ions play an important role in the maintenance of fluid and electrolyte balance, including activating a number of enzymes involved in the regulation of this balance.
The beneficial properties of salt also lie in the fact that it is involved in conducting nerve impulses and muscle contractions. One-fifth of the total amount of the daily requirement of salt is in the production of hydrochloric acid gastric juice, without which normal digestion.
If insufficient intake of salt in the body in man is reduced blood pressure, heartbeat quickens, there twitching muscle weakness.
In medicine, sodium chloride solutions used for dilution of drugs for the shortfall in the body fluid and detoxification. For colds and sinus saline washed nasal cavity and paranasal sinuses. Salt solution have weak antiseptic properties. For constipation help enema salt solution which is capable to stimulate the motility of the colon.
The daily requirement for sodium chloride is about 11 grams, contains so much salt 1 teaspoon salt. In hot climates with marked perspiration daily requirement of salt above and is 25-30 But often, the real salt intake exceeds this figure by 2-3 times. Calorie salt is practically zero.
When sodium chloride Abuse developing hypertension, heavy duty work kidneys and heart. When excess of its contents in the body begins to dwell water, which leads to edema, headaches.
In diseases of the kidneys, liver and the cardiovascular system, rheumatism and obesity are recommended to limit salt intake or eliminate it.
Poisoning table salt
Use of salts in large quantities may not only adversely affect the health, but also be the cause of death. It is known that the lethal dose of sodium salt of 3 g / kg body weight, these figures have been established in experiments on rats. But table salt poisoning often happens with animals and birds. The lack of water aggravates the situation.
When the body is adjudged salt, changing the composition of blood and blood pressure rises sharply. Due to the redistribution of body fluids is disturbed the nervous system, blood cells are dehydrated - red blood cells, and the cells of vital organs. As a result of impaired oxygen delivery to the tissues, and the organism dies.