How to turn water into wine, with raisins
Kyoto UniversityPeer-Reviewed Publication
Kyoto, Japan -- It's astonishing to realize how innovative our ancestors were in food and beverage production before modern science and technology. Without understanding or isolating them, ancient peoples made use of yeasts like Saccharomyces cerevisiae, the primary species behind the fermentation process that creates alcohol, though there are some non-Saccharomyces yeasts that can also produce alcohol with different characteristics.
While modern wineries typically use cultured S cerevisiae, it is thought that ancient wine production relied on the natural fermentation process of storing crushed grapes in jars. However, research has revealed that S cerevisiae rarely colonizes grape skins, casting doubt on the use of fresh grapes for alcohol fermentation.
This inspired a team of researchers from Kyoto University to investigate the humble raisin's ability to ferment into wine. In a previous study, the team had found that S cerevisiae was abundant on raisins, indicating that in ancient times they could have been used for wine production.
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