科普專欄–薯不揀單 - 深入淺出–細菌能否用來釀酒？

酵母能夠將葡萄糖轉化成為酒精及二氧化碳，酵母品種Saccharomyces cerevisiae亦因此亦成為了釀酒用的長年之選。529Please respect copyright.ＰＥＮＡＮＡvdOKCZ6hgS
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那麼除了酵母之外，細菌又可不可以用來釀酒呢?529Please respect copyright.ＰＥＮＡＮＡNkHnj1OL2E
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（圖2）事實上的確有細菌品種能夠轉化葡萄糖為酒精，Z.mobilis是其中一道例子，其產生酒精的效率比酵母高出3-5倍(Ref1)。529Please respect copyright.ＰＥＮＡＮＡfxkhQQsucU
甚至乎，Z.mobilis 細菌的最高酒精產量可達97%(Ref2)，而S. cerevisiae則最高只能去到90-92%(Ref3)。529Please respect copyright.ＰＥＮＡＮＡEFSuC5l5aC
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可觀的表面數據擺在眼前，為何好像並不常聽見有人利用細菌來釀酒呢?529Please respect copyright.ＰＥＮＡＮＡK4pprOb3bn
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（圖3）其中一道致命的原因，就是該細菌產生酒精的過程中，會產生帶有異味及混濁顏色的化學物（Acetylaldehyde及Sulfide Compounds），為酒精飲品帶來味覺及視覺的負面影響。529Please respect copyright.ＰＥＮＡＮＡIO72rESZmZ
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以墨西哥的普逵酒 (Pulque)為例，其釀製過程中便會加入Z. mobilis，從圖中可以清楚見得到其視覺的衝突，至於味道究竟如何我就不太清楚......529Please respect copyright.ＰＥＮＡＮＡFTa4S52xSN
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另一方面，基於Z. mobilis 無法在pH 3.75以下的環境繁殖，有不少的英國蘋果酒均會盡量將pH壓低3.5或以下，減低酒精受到Z. mobilis污染的機會。529Please respect copyright.ＰＥＮＡＮＡaox3dnVIkD
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雖然細菌在產酒過程中會產生對飲用帶來負面效果的化學物，但基於其卓越的產酒效率，在工業用酒精的生產方面仍有其發揮空間。529Please respect copyright.ＰＥＮＡＮＡfJ9XNJkxUN
同時間，亦難保有科學家會利用基因編輯技術，產生出一種高效率而又不會產生不良化合物的釀酒細菌品種。529Please respect copyright.ＰＥＮＡＮＡ2ceElCORU8
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如果想我快啲出文的話，請入去Penana網站科普專欄–薯不揀單俾一個like以及Bookmark，這對我非常之重要。529Please respect copyright.ＰＥＮＡＮＡ8TELQs6kAA
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Link: https://www.penana.com/story/66244/%E7%A7%91%E6%99%AE%E5%B0%88%E6%AC%84-%E8%96%AF%E4%B8%8D%E6%8F%80%E5%96%AE/toc529Please respect copyright.ＰＥＮＡＮＡgODOvcZfcY
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同時亦可以在Penana網站裡按「買一嚿/半嚿薯仔」，以課金的方式推動我繼續搜羅資料寫文，多謝。529Please respect copyright.ＰＥＮＡＮＡi82NVlpKad
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Link:529Please respect copyright.ＰＥＮＡＮＡvDskShb8bn
https://www.penana.com/user/27349/%E8%96%AF%E4%BB%94%E8%81%9E%E8%8C%B1%E8%8E%89/portfolio529Please respect copyright.ＰＥＮＡＮＡVTv8tmr7ke
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有興趣接收科學資訊的話，歡迎follow IG: potatopigtongue。529Please respect copyright.ＰＥＮＡＮＡNueMYbjmU7
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Ref1:https://academic.oup.com/femsle/article/145/3/301/605010529Please respect copyright.ＰＥＮＡＮＡBEAgIGWCoG
Ref2:https://link.springer.com/chapter/10.1007%2F3540116982_2529Please respect copyright.ＰＥＮＡＮＡwG2rXdk3Au
Ref3:https://link.springer.com/article/10.1007/s00253-003-1393-5529Please respect copyright.ＰＥＮＡＮＡkffzkNAXIJ

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