Tin: The role where it is contained, excess and disadvantage

It is believed that tin It is known to people for about 6,000 years, or even more. At least in the Bible about this metal mentioned; Greeks and Romans knew about it for sure; It was used to create various alloys, including bronze, in ancient times that were one of the most popular materials – from her then made many different items and products. Pure tin, however, began to be used later – about 2800 years ago – from it, as the results of archaeological excavations show, not only dishes, but also decorations.

The name of the metal scientists cannot explain exactly: it is assumed that it comes from the Greek "alophos" – "white", although such names are found in other European languages. The Romans were called tin "White Lead", but in Latin his name Stannum means "solid".

Tin occurs in nature is not in its pure form, but almost always in the composition of ore; In the plants of chemists found him in the middle of the XIX century, and in animal organisms in 1923.

For industrial purposes, tin is obtained mainly from Cassiiterita – this is the main tin-containing mineral: before it was called wood, river and residential tin, as well as tin stones. Another source of tin – a station, a mineral with a metal glitter – tin cchedan, olive-green or gray-steel.

Tin – Light metal: silver-white, brilliant, loss and plastic, so today it is used in various fields of industry very wide, and not only in alloys.

In alloys or in pure tin is used to create coatings; It is part of a white tin – canning cans make it; It is used in the manufacture of electronics – when soldering materials; in pipelines and t.D.

Tin compounds are applied when decorating various premises – with their help, the masters receive the effect of gilding, process plastics and glass; Other connections are used in obtaining glaze, ruby ​​braid; When welding metals, the manufacture of lead-tin batteries and complex structural alloys used in different fields of industrial production.

Polymer paints, which include tin, are used to dye the bottom of the ships to prevent them with molluscs; A glass containing tin in its composition does not miss X-rays; Effective insecticides – for example used to protect wood from pests, also contain tin compounds.

Another area of ​​applying tin, which is known to be a few – making musical instruments, and special – such as bells and organs. The bells, cast from alloys, as part of which are tin, calls particularly melodious, and the organ in which tin pipes are used, sounds with a special force and purity.

Tin in the human body

If we talk about the role of tin in the human body, then little can be said: the scientists answer that this role is almost not studied, but there is a tin in our body – in very small quantities, and it also comes with food – every day, 0, 2-3.5 mg.

How Tolo gets into our body? It is contained in food products: vegetables, some fats – for example, in some grades of fatty fish, in dairy products; The most tin is in fats, but a person often gets it from the packaging – it is contained in the metal of cans, foil and t.D.

In plants, the content of tin hesitates – the most in the peas and sunflower seeds, but in general in vegetables it is very little.

An adult can receive up to 50 mg of tin per day – it is much, since already 20 mg is considered toxicity threshold. Fortunately, the highest 10% of this quantity is absorbed in the gastrointestinal tract, but usually only 3%. The tin in the body turns into fat soluble salts, and is present in the tissues, bones, small intestines, heart and kidneys; It is removed with urine and bile.

Whether tin is needed at all, and can its deficit? Scientists again cannot say anything definite, but it is believed that Tin accelerates growth processes and affects the activity of some digestive enzymes. When the experiments on animals were carried out, they slowed down with a lack of tin, they did not add in weight, they heard worse, and they also had a balance of minerals in the body.

Tin is not considered too toxic metal, but when it accumulates in the body in the mouth, a light metal taste can be felt; In the cells, the processes of changes in the structure of chromosomes can begin – and this is already very serious, but for this tin should be in excess to enter the body for quite a while.

2 grams of tin per day are considered toxic dose for a person, but there is no death dose.

Tin role where contains, excess and disadvantage

To find out how much tin is contained in the human body, you can explore your hair or urine: if the tin content is increased, then it will immediately be visible according to the results of the tests. It happens that the tin content in the human hair increases, if he contacts him by the nature of his work, and in everyday life, canned canned food often, and even constantly cleans the teeth with fluorine-containing toothpastes.

Although tin and is not considered a particularly toxic element, it cannot be called safe: with constant contact with him, people develop light diseases, and specific – this is a glass when a person appears shortness of breath and a heavy cough with a wet. Also reduced appetite, sleep worsen, weakness, dizziness and headaches, nausea, abdominal pain, digestive disorders, skin rash and itching. In addition, the vision and composition of the blood can be disturbed, the liver increases, the blood sugar level increases, and the content of copper and zinc in the body decreases: these substances are equalized by tin antagonists – on biochemical processes occurring in cells, they provide the opposite effect.

Women are more sensitive to Tin than men – they have its excess may even cause depression arising from the violation of the structure of nerve cells.

Tin, falling into the body in large quantities, can cause poisoning: there are cases when many people received such poisoning, using tin cans. With a debt of storage of the wall, the cans begin to collapse, especially if there are nitrates in juices, and then the product becomes dangerous to human health. It is not by chance that sanitary and other doctors always require the product to shift the product into a glass or any other safe container – the storage of canned food in an open tin can bring much more problems than from the dishes.

In addition, with age, the body ceases to actively withdraw the tin, so that in the elderly, it can accumulate in lungs, causing the disease and shortening their lives.

Recent studies revealed another hazardous factor: if residential buildings are located near the motorway (500 m or closer), then the excess tin is accumulated in them, in the form of dust or vapor. Malignant tumors, especially with a weak general immunite, in such conditions develop much faster – this is because under the influence of tin the number of calcium in cells increases, and magnesium becomes less – magnesium does not give cancer cells to share and develop. Therefore, those who live in such houses need to consume more products rich in magnesium, and, if necessary, take magnesium preparations additionally – this will speed up the elimination of tin from the body.

There was a time when tin preparations were used in official medicine: even at the beginning of the last century, with the eye of the eye – tinzitis of the corneal was externally used; With eczema, some types of worms, neurosis and epilepsy, tin chloride was used – externally and inside. Today there have been many other medicines, and such drugs are no longer used.

With chronic poisoning, symptomatic treatment is prescribed: hepatoprotectors, diet therapy, zinc and copper preparations are used; In severe cases, chelating therapy is used – substances binding and withdrawing various metals are introduced into the body.

In the production of fungicides, pesticides and plastics today are often used to salts of tin – workers such enterprises always belong to the risk group.

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