A Complete Collection of 100000 Whys
Fav十万个为什么
饭菜为什么会馊？
饭菜会馊主要是因为微生物的生长和繁殖、酶的作用以及氧化反应，具体如下：
1、微生物的生长和繁殖：饭菜放置一段时间后，其中的微生物，如细菌和真菌，会利用饭菜中的营养物质进行生长和繁殖。这些微生物会产生各种酶和代谢产物，导致饭菜变质、发馊，并产生难闻的气味。
2、酶的作用：饭菜中本身含有各种酶，这些酶在适宜的条件下会催化饭菜中的化学反应，加速营养成分的分解。例如，脂肪酶会分解脂肪，蛋白酶会分解蛋白质，这些分解过程会导致饭菜变质。
3、氧化反应：饭菜中的脂肪、维生素等成分容易与空气中的氧气发生氧化反应，产生过氧化物和醛类等物质，这些物质不仅会使饭菜的营养价值降低，还会产生异味，导致饭菜变馊。
总结：饭菜会馊主要是因为微生物的生长和繁殖、酶的作用以及氧化反应。
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