时差N小时 怎样防止面包变质?(上)（在线收听）

How To Keep Bread From Going Stale

怎样防止面包变质？

Generally speaking, refrigeration helps to keep food fresh. Fruits, vegetables, and dairy products all last longer if kept cool.

一般说来，冷藏可以让食品保持新鲜。冷藏的水果、蔬菜和乳制品的保鲜时间更久。

But don’t try to store a loaf of bread in the refrigerator if you want it to stay fresh–refrigeration is the quickest way to make bread go stale.

但是如果你想让面包保持新鲜，千万别放进冰箱——冷藏会让面包更快变质。

Stale bread，on this moment of science.

今日科学一刻：变质的面包。

As bread ages, it develops the dry, crumbly texture and leathery crust that define staleness. But staling isn’t simply a matter of the bread drying out. Bread can grow stale even if it’s sealed tightly enough that no water can escape from the loaf.

面包放的时间久了，会变得干巴、易碎，外皮粗糙，这说明面包变质了。但是变质不仅仅是指面包干巴。即使面包处于密封状态，水分没有流失也会变质。

Bread stales when the starch inside the loaf loses its ability to hold water. Chemical changes in the starch inside the loaf cause it to lose water.

面包的淀粉失去锁水功能，面包就会变质。淀粉内部的化学变化会导致面包的水分流失。