In life, when people are misunderstood by others, they will say, "I really deserve more than Dou E." This kind of speech, I believe that everyone has been quite familiar with. However, today I want to talk about the protagonist of "More Than Dou 'e", not "you and me" in life, but we are very familiar with but do not really understand the can
 

For a long time, people have more or less had this question about canned fruit: is it not too fresh? The shelf life is so long, is there any preservative added? "Oh my God, preservatives have nothing to do with cans," says a knowledgeable insider. Next, let Xiaobian to uncover the truth for you

In order to extend the preservation of food, human beings for thousands of years to think of a number of ways, such as smoking, sun, salting, etc. Of these methods, canning is the youngest, starting in 1810. At that time, in order to solve the problem of food supply in the battle, Napoleon of France offered a reward for a new method of food preservation. After years of research, Nicolas Appert, a sugar chef in Paris, invented the method of using glass bottles to hide food. Then in 1810, Peter Durand of England invented tinned metal canisters, which made it possible to produce canned food by hand

In 1864, France's Louis Pasreur discovered that food spoilage was caused by microorganisms, thus clarifying the principle of canning, and scientifically formulated the canning production process. At this point, the canning industry entered the modern world food industry

 

The can is nutritious and fresh

 

Excessive temperature, the loss of food in the protein, vitamins, minerals and dietary fiber. And the processing temperature of cans is generally not higher than 122℃, well below the temperature of home cooking. So, to some extent, the loss of nutrients from canned food is less than from home cooking

 

Cans contain no preservatives

 

Canning is made by putting food in an airtight container while it is hot, and heating it at a certain temperature makes the product commercially sterile, so it can be kept fresh for a long time without any preservatives