A Complete Collection of 100000 Whys
Fav十万个为什么
为什么食物会变坏？
1、微生物作用：食物中的细菌、霉菌和酵母等微生物会分解食物中的有机物，导致食物变质。
2、化学反应：食物中的成分会发生氧化、水解等化学反应，如脂肪氧化产生哈喇味，蛋白质水解产生异味。
3、温度影响：高温会加速微生物繁殖和化学反应，而低温可以减缓这些过程，因此冷藏能延长食物保质期。
4、湿度作用：高湿度会促进霉菌生长，而干燥环境则能抑制微生物活动，因此干燥食物不易变质。
5、氧气接触：氧气会加速食物氧化，如水果切开后变褐，因此真空包装能延长保质期。
总之，食物变坏是由于微生物、化学反应、温度、湿度和氧气等多种因素共同作用的结果，控制这些因素可以有效延长食物的保质期。
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