EPISODE · Nov 5, 2025 · 22 MIN
2025 biology talkshow:優酪乳的微生物科學
from 雷比特生物空中講 · host 雷比特老師
詳細解釋優酪乳（優格）從歷史起源到現代製作的完整科學原理，指出優酪乳不僅是變酸的牛奶，而是一場精密的「蛋白質政變」。首先追溯優酪乳從中亞遊牧民族的「意外」發現到俄國科學家梅契尼可夫提出益生菌概念的歷程。接著解析乳酸菌的共生發酵機制，說明嗜熱鏈球菌與保加利亞乳桿菌如何合作產生乳酸。最後闡述核心的凝固科學，透過「酪蛋白膠束」在pH值降至等電點（4.6）時失去電荷並形成三維網絡的過程，詳述液態牛奶轉變為半固態優酪乳的關鍵步驟，並提供實作教學與常見問題的科學解答。 聽完後可以自主進行線上測驗，檢視學習成效喔~(需要登入gemini) 測驗網址 https://gemini.google.com/share/49cfbc7fb7fc Powered by Firstory Hosting
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2025 biology talkshow:優酪乳的微生物科學
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