科学素养与生活应用·英语30篇（1）

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蜂蜜为何永不腐坏？其抗菌特性揭示了古代食物保存的科学原理

Honey resists spoilage due to low water content, high acidity, and natural hydrogen peroxide production.
Bees add an enzyme called glucose oxidase to nectar, which slowly generates hydrogen peroxide.
Its pH ranges from 3.2 to 4.5, too acidic for most bacteria and molds to survive.
Osmotic pressure from concentrated sugars draws water out of microbial cells, dehydrating them.
Archaeologists have found edible honey in Egyptian tombs over 3,000 years old.
Modern labs confirm ancient honey samples still inhibit Staphylococcus and E. coli growth.
Crystallization doesn’t mean spoilage—it’s just natural sugar reformation and fully reversible.
Raw, unheated honey retains more enzymes and antimicrobial compounds than pasteurized versions.
Some hospitals even use medical-grade honey to treat chronic wounds and burns.
This natural preservative shows how empirical knowledge preceded microbiology by millennia.