Northerners are used to eating steamed bread. Mr. Zhou, who lives in An, said that he brought a big bag of steamed bread back to An from his hometown a while ago and put it on the balcony. These two days, he found that some steamed bread was moldy. He felt that moldy steamed bread could no longer be eaten, but his father was reluctant to throw it away. He thinks that moldy places can be removed, and places that are not moldy can still be eaten.

Zhang Jian, director of Xi 'an Nutrition Society, said that the mildew point everyone said is mold, which is a fungal microorganism. Mold cells are invisible to the naked eye, and mold colonies produced after a large number of molds are visible to the naked eye.

Steamed bread is rich in starch, and some fluffy, flocculent or cobweb-like colonies will grow under wet and warm conditions. Some molds are colored, and some molds are not easy to be found when they are white at first, and they are easy to be found when they become taupe and black after maturity.

Therefore, there are actually many invisible molds near the visible molds. The more serious the food is moldy, the wider the spread of bacteria, molds and other microorganisms and their metabolites in food.

Zhang Jian said that steamed bread and other foods are easy to breed Aspergillus, Penicillium, Mucor and Fusarium.

Some molds and their toxins are easy to cause food poisoning after eating. For example, aflatoxin has hepatotoxicity, and long-term small intake can cause subacute and chronic damage. It is a recognized carcinogen, and aflatoxin is heat-resistant, and its toxicity can only be destroyed when the temperature reaches 280℃. In addition, some toxins produced by penicillin and Fusarium can cause food poisoning.

Zhang Jian reminded the public that the moldy parts of moldy steamed bread have molds and mycotoxins invisible to the naked eye, and the daily heating temperature cannot completely remove mycotoxins. Therefore, moldy food must be thrown away in time, and never eat it with luck, so as not to cause food poisoning.

For the preservation of steamed bread, Zhang Jian suggested that if the amount of steamed bread is small, it can be eaten the next day. These steamed bread can be stored in the refrigerator and heated when eating.

If you buy more steamed buns that you can't finish in two or three days, you can put the extra steamed buns into clean food plastic bags according to the amount of each meal and then freeze them.