American researchers at the university of California, said compared with fresh fruits and vegetables, canned foods right can help the body absorb more beneficial substances.
Experts to the market to buy canned food ingredient was studied, the results found that some beneficial trace elements contained in the canned food more than the content of fresh fruits and vegetables. According to the researchers, fresh fruits and vegetables are just when just picking can provide all kinds of vitamins and minerals to the body, but usually these fruits and vegetables preservation conditions will not be able to keep all of healthy nutrition.
Expert explains, preserved fruits and vegetables is the biggest problem is that they will be oxidized, the oxidation process of damaged one of the useful material, and not appropriate temperature will make the process more serious, such as fresh fruit contain rich vitamin C, if be in the warm environment will soon lose its beneficial composition. And in this sense, canned food does not contain an important element in fresh fruits and vegetables, but not by oxidation loss its nutrients.
Experts stressed that although the canned food through the hot working process, but it does not affect the beneficial ingredients, such as vitamin K, E, A and D.
Canned food storage and transportation process may appear to bilge tank (bulge bag), flat cover acid bad, dark and rotten phenomenon such as mold. So will happen series of canned food poisoning accident.
1, canned bottom cover under normal circumstances is flat or concave shape, appeared outside convex phenomenon known as the bilge tank. Such as glass pot cover, jumping as soft canned bulge bag. Swells three reasons: bacterial bilge tank, physical bilges bilge tank and hydrogen.
2, flat cover acid bad or the deterioration of canned of flat cover normal appearance, and content has metamorphism occurred under the bacteria activity, a mild or severe acid. The PH value can be next to 0.1 ~ 0.3). Guide to the flat cover addled deteriorated microbes are called flat acid bacteria.
3, in the black clostridium activity, sulfur protein decomposition difficult and produce only H2S gas, iron reacts with wall black sulfide, deposit on the tank wall or on the food, the food were black and stink, this phenomenon is called black or sulfur stink of corruption.
5, sterilization of canned foods, canned crack leakage or early corruption are the main cause of canned food deterioration.
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