"Does there still steamed buns in the refrigerator at home? I'll throw them away. I saw that it can't be eaten online."
Uncle Wang felt inexplicably when he heard his wife say this. "Why can't you eat it? You can eat it in the refrigerator for at least one week."
"Look." My wife extended her phone to Mr. Wang, and she saw an article saying: steamed buns are made of starch, and it is easy to produce the carcinogen aflatoxin.
Uncle Wang still doesn't believe it, "We have been eating for so long, it's okay. If you don't eat it, I will eat it. Even if it gets moldy, I will throw away the moldy part and eat the other parts hot. The high temperature can kill these molds." But my wife still feels it's not good. After all, she is not afraid of ten thousand, but she is afraid of anything.
As a food that people in the north and south love, can’t steamed buns be stored in the refrigerator? What foods are not suitable for refrigerators?
1. Will steamed buns be placed in the refrigerator and generate "class one carcinogen"?
Refrigerator is divided into refrigeration and freezing layers. The article says that steamed buns cannot be placed in the refrigeration room. It is believed that refrigeration will accelerate the drying and hardening of the steamed buns, and the taste will become worse, which will dry faster than at room temperature.
In this regard, CCTV Finance reporters purchased five fresh steamed buns in three days, and obtained five steamed buns samples under different placement conditions: fresh steamed buns, steamed buns that are refrigerated for one day, steamed buns that are refrigerated for three days, steamed buns that are placed indoors for one day, and steamed buns that are placed indoors for three days.
The results found that the hardness of steamed buns that were refrigerated for three days was no different from the first day. The steamed buns that were kept at room temperature for three days had become moldy and harder.
Professor of the Institute of Agricultural Products Processing, Chinese Academy of Agricultural Sciences Wei Yimin pointed out that steamed buns are most likely to be recycled and aging, which is manifested as increased hardness and room temperature storage also faces the loss of steamed buns' moisture. Therefore, it is recommended to refrigerate, and the best way is to freeze.
Image source: CCTV Finance "Is it true? 》
. Some people are worried that putting it in the frozen layer will lead to the growth of aflatoxin, which is also wrong.
Aflatoxin is produced by Aspergillus parasiticum and Aspergillus aflatoxin. The suitable temperature for Aspergillus aflatoxin is 12 degrees to 42 degrees, the suitable temperature for toxin production is 24-28 degrees, and the suitable humidity is 93%-98% RH.
The freezer temperature in the refrigerator is generally around minus 18 degrees Celsius, with an average humidity of only 50% RH. The roots of cannot meet the appropriate conditions for the growth of Aspergillus aflatoxin , and the life activities of microorganisms in the freezing environment are actually very slow and basically no toxins are produced.
steamed buns are stored in the refrigerator The biggest risk is Salmonella , Yersinia, Staphylococcus aureus and other foodborne pathogenic bacteria . Listeria monocytogenes is a type of chilliphila , which has strong adaptability. This bacteria can survive and reproduce below zero degrees. Once infected, it can cause symptoms such as nausea, fever, diarrhea, and severely induce enteritis , sepsis, meningitis, miscarriage, etc.
In addition, long-term freezing will lead to the loss of moisture and nutrients of steamed buns. If the steamed buns are contaminated before freezing, they will still spoil when put in the freezing. Therefore, it is not suitable to freeze for too long, and it must be completely heated before consumption.
2. Can moldy steamed buns be eaten after removing the moldy areas?
Is there any risk of throwing away the moldy area and eating the other parts on heating? After food such as steamed buns and other steamed buns spoiled, microorganisms need to live in for a period of time before they slowly appear sensoryly recognizable signals such as mold spots and sour smells. Most of these moldy foods will produce harmful toxins. It is not recommended to eat them again when removing moldy areas. It is best to throw away .
This is because moldy foods, in addition to the moldy areas, the invisible areas may have been occupied by molds. Even if they have to be cut off, they cannot be accurately cut off the toxin-containing parts. Moreover, toxins such as aflatoxin , which can only be cracked at a temperature of 280 degrees. Ordinary high cooking temperatures cannot be killed.
3. Refrigerator is not omnipotent, 4 kinds of foods are not suitable for refrigerator
Although refrigerator can be used to store food and fruits and vegetables, it is not omnipotent, and not all foods are suitable for putting them in the refrigerator.
, root vegetables such as sweet potatoes, potatoes, etc.
Sweet potatoes, potatoes and other vegetables are not prone to loss of moisture, so they can be placed in a dry place indoors. If placed in the refrigerator, it may become soft and moldy due to the high humidity.
, tomatoes, cucumbers and other melons, eggplant vegetables
Whether it is ripe or unripe tomatoes, it is best not to put them in the refrigerator.
If it is not ripe, put it in the refrigerator, which will affect the ripening process of the tomatoes and affect the umami flavor. Ripe tomatoes should be eaten as soon as possible. Cucumbers may be frostbite when putting in the refrigerator, and you should buy them now and eat them now.
, tropical fruits such as bananas and lychees
Lychees, bananas, etc. are suitable for storage at temperatures above octave. The temperature in the refrigerator's refrigerator's refrigerator is only about 4 degrees, which is easy to frostbite these fruits, and the peel becomes black and sunken. It is best to put these fruits in a cool place away from light and eat them as soon as possible.
, honey, chocolate
Honey itself is high in sugar, which is not conducive to the survival of microorganisms and can be stored for a long time at room temperature. Put it in the refrigerator, which may cause glucose to precipitate, which will affect the taste after crystallization.
chocolate is stored in the refrigerator for too long, and the surface is prone to white frost. This is fat crystallization. Although it does not deteriorate, it affects the taste. It is best to store it at room temperature around 20℃.
4. Freeze steamed buns in the refrigerator. Pay attention to these
When you usually freeze steamed buns in the refrigerator, you should pay attention to a few points.
First, after cooling the steamed buns during freezing, try to seal them in a fresh bag and put them in the freezer while they are fresh.
Freezing time should not exceed one week, and it is best to finish it within two or three days. If it is a steamed bun with packaging, it can be stored for longer, so it is recommended not to destroy the packaging.
In addition, when eating frozen steamed buns, you must remember to heat them thoroughly to reduce food safety risks. It is best to clean the refrigerator regularly to reduce the growth of bacteria in the refrigerator.
It is best to store steamed buns in the refrigerator. Freezing is better than refrigeration. The statement that frozen steamed buns produce carcinogens is not credible, but the freezing time is too long, which can easily affect the taste of the steamed buns. It is best to throw away moldy steamed buns to avoid eating moldy toxins. The frozen steamed buns must be fully heated before eating.
Reference materials:
[1] "[Is it true] Shouldn't steamed buns be refrigerated in the refrigerator? 》.CCTV Finance.2016-06-11
[2] "Can the moldy part of the food be eaten after it is removed? NO! ! ! 》. China Food News official platform.2021-10-07
[3] "If the food is cold, it is better to put it in the refrigerator, or to put it while it is hot? What foods are not suitable for refrigerators? The answer is here》. Popular Science China. 2021-12-24
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