The mystery of mold _600 words

My mother is very concerned about my diet. She often says: "Don't eat bread often, it's not good to eat too much, and don't be partial to food …" But I just love partial to food and often eat bread. My mother was very angry after seeing it, so she didn't buy it for me. Fortunately, I hid a bag and never wanted to eat it. One day, I was a little hungry and ate bread, but the bread was moldy. After a few days, there were more and more molds. What happened? This aroused my interest, so I went to school and asked the science teacher. The teacher said, "There is a lot of knowledge to discover by yourself. Do experiments to find the answer. " I hurried home to do the experiment.

I prepare four pieces of baked bread first, and put some mold on each piece with a toothpick. I divided it into two groups. Group 1: Keep the bread dry, put it in a plastic bag and tie the bag tightly. Put the first piece in a damp place, and then put the second piece on the balcony. The second group: keep the bread dry, put it in plastic bags respectively, and tie the bag mouth tightly. Put the first piece in the refrigerator and the second piece at room temperature. On the first day, I found that the second bread in the first group and the second bread in the second group had more mold, while the first bread in the first group and the first bread in the second group did not change. The next day, I observed it for a while, and the result was still the same. In this way, day after day, this result is always the same, which can prove that the temperature increases rapidly at room temperature. I looked it up on the Internet again, and a webpage said: Most molds belong to mesophilic microorganisms, and the optimum growth temperature is generally 20-30℃, and the optimum temperature for mold reproduction and toxin production is 25-30℃. Therefore, mold grows rapidly at room temperature. In fact, mold is harmful to human health. Mold has three major hazards to human health:

First, the food is moldy. After eating moldy food, it may directly cause poisoning or produce carcinogens, which will be toxic to the human body.

Second, mold infection. Mold directly breeds in the human body, causing fungal pneumonia and other diseases, which are more common in some people who are weak after a long illness.

The third is allergic diseases caused by mold, such as bronchial asthma and dermatitis. In addition, mycin has a strong tolerance to temperature, so it is best not to eat food contaminated by mold.