Canned yellow peach is eaten within two days after opening, and the food in the jar soon tastes bad and slowly turns dark. This is because after the canned content contacts with the air, amino acids and sugars react with melanin to generate dark brown substances. Vitamin C contained in the fruit reacts with oxygen to generate glycolaldehyde and other substances. Additional, the pigment that fruit place contains basically is anthocyanin, its property is extremely unstable, fall in the action of oxygen, can accelerate its fade, color, change color. The rate of change is also accelerated at higher temperatures. These changes affect exterior only commonly, won't affect quality, but the time that puts aside is too long, can make sugar juice, fruit changes flavour, affect edible value.
Canned yellow peach in addition to the fruit itself contains a lot of sugar, canned production should also take part in white sugar, the amount of sugar and fruit contains organic acids, it is easy to be lactic acid bacteria, yeast and other microorganisms in the air invasion pollution, and rapid reproduction. In the process of growth and multiplication, these microorganisms can synthesize sugar and organic acids into lactic acid, acetic acid, ethanol and other substances, so that the sugar juice in the tank presents turbidiousness, fermentation, and the flavor of aspersion or rancidity. After opening the can, try to eat it all at once. It is easy to be polluted by microorganisms such as lactic acid bacteria and yeasts in the air if it is not finished after opening. Fruits and vegetables should be eaten in two days at most. Just opened the can, bright color, clear sugar juice, taste rich fruit, sweet and refreshing, even sour fruit, eating is also sweet and sour taste.
If the canned fruit is not eaten all at once after opening it, it will change after a few days. General sugar juice color, dark fruit color, taste is not so sweet and delicious, will become cloudy sugar juice, juice and pulp taste sour, sometimes will produce rancidity transformation, can not be used for food. With the tinplate canister that did not besmear protects plastic ester or the tinplate canning fruit canning, the sugar juice that eat left down and fruit are put inside the canister, below the action of oxygen, organic acid and iron, tin contact, also can produce black material, not only pollute food, and make canister wall oxidation, rust very easily peel layer, eat can have metallic rust taste.
The above is about the yellow peach canned food all kinds of problems, we should buy qualified cans and pay attention to the correct consumption time, in order to avoid unnecessary trouble, I hope the above content is helpful to you.