Sunday, July 11, 2010

What Should Be Colour Of Lahanga

food, metals in food


METALS, metals in food


Exposure to lead or mercury is through inhalation, ingestion of contaminated food or water or through the placenta or breast-feeding in children.


pollutants Metals:

  • Lead Mercury


The Lead is a naturally occurring metal that can be found in different parts of
l environment although most comes from human activities,
as ng production of batteries and ammunition among others.

Because of concern about the effects of mercury on health has reduced its presence in gasoline, paints and ceramics.


Young children exposed to this metal by ingestion of lead paint, for example sucking paint-coated toys. Children are more vulnerable to lead poisoning than adults because a child who ingested large amounts may develop anemia, stomach pain, muscle weakness and impaired nervous system. Fetuses are exposed through their mothers and potential health effects in children include prematurity, growth retardation, impaired mental abilities, learning disabilities and impaired motor development.

Mercury is a metal, combined with other elements like sulfur or oxygen, form inorganic mercury or mercury salts, which are used as powders or crystals in cosmetic creams or creams antiseptic. The main source of mercury is the use of fossil fuels, mainly coal contains trace amounts of this metal. To burn the compound enters the environment. Anaerobic media (when no oxygen) bacteria transform it into methyl mercury. This form is the more readily bioaccumulate in organisms and humans. It is also a metal used in thermometers (and some medical instruments), dental entrata and fluorescent bulbs, and batteries.

As with lead, children are more sensitive to the effects of mercury than adults. Among these effects include damage to the nervous system, mental retardation, incoordination, blindness and speech difficulties.


not you ever wondered how losmetales can be incorporated in foods?, Let's take an example. Imagine a tomato grown near a busy road, this, provides lead. And you say, but if leaded gasoline is now banned in Spain, if true, but the polluting effects last long.

Now imagine also that the water used for irrigation comes from a river that crosses an old mining area, or simply that the river is discharged from a foundry waste and to make matters worse, we add that the soil where This planted the vine, is rich in copper

and, as you already have an explosive cocktail entomatadas.

That tomato sauce made and this is canned, the tin can is bringing to this cocktail we add tin metal and possibly some iron. You buy the can, and cooking the contents in a pan of aluminum, some metal, albeit very small, it will dissolve into the sauce as the acidity of the tomatoes and heat of fire contribute to this effect.

Some metals are essential for our body, indeed, the deficiency of these can create problems of health, but other metals such as lead or mercury are nothing beneficial for our body.

Next, well, you eat the tomato sauce and those metals pass to your body, what more can we say ....

metal residues in food

What grows or farmed in environmentally metals invariably incorporates a greater or lesser extent. In addition, harvest, transport, handling, packaging or cooked products of vegetable or animal, also the metals are present in tools and utensils. The article is an analysis of metals and nonmetals highlights, its presence and toxic effects of exposure at high doses.

The crust is made up of very different composition of minerals and metals, ie, items that are in the middle and left of the Periodic Table of the Elements, are an important part thereof. Certain sectors of the environment that surround us, like water, air and soil, contain metals at concentrations above normal, well naturally but also due to pollution. Understood for the latter metals that man has removed from its place more or less hidden in the depths of the earth, not for living beings, to make it available to them in amounts above what is usual.

consequence of this is the introduction into the environment of metals to a greater or lesser extent. In addition, harvest, transport, handling, packaging or cooking of products of vegetable or animal, even the metal tools and utensils used to carry out those purposes can migrate to food that is in contact with them.

How metals can be incorporated in food?

An example would be: a tomato grown near a busy highway will include lead (if leaded gasoline is now banned in Spain, its polluting effects will last for a long time yet.) Furthermore, if irrigation water is used from a river flowing through an old mining area or waste being discharged from a foundry, and also if the agricultural land itself was already very rich in copper and was treated with pesticides, mercury long ago, we already have incorporated some metals.

If that tomato sauce is made and packaged in a tin can, also will appear as tin and some iron. And finally, if the consumer opens the can and boil the contents in an aluminum pan, invariably something of this light metal will dissolve into the sauce, favored by the acidity of the tomato itself and the heat of the fire.

metals do we need?

Metals not are bad by definition, since many are essential in our diet. Moreover, in some cases the deficiency may involve many health problems like excess. Others, however, no known physiological function fulfilled, and it is always best to avoid: the case of mercury, lead or cadmium, in general, of several heavy metals.

But being present in the environment naturally or by human actions, our exposure through food can hardly be avoided. Although it can be minimized, trying to producers and other staff to be reduced where possible and reasonable entry in the food chain and also by us, diversifying the most of what we consume. Do the latter is not only a sensible recommendation made by dietitians on the basis that there is complete food hundred percent covering all our daily nutritional needs but also is a board of toxicologists, we know (and try to know) that certain foods often hidden surprises for their content too, and even alarming, in particular metals.



Name: Yenny Zoraida Morales Zambrano

Subject: RF Circuits

Source:

Posted by admin at 5:33 PM

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