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http://dx.doi.org/10.9799/ksfan.2017.30.3.491

Brewing and Properties of Low-Malt Beer with a Sweet Potato Paste  

Yang, Ha-na (Gang Dong-O Cake Co. Ltd)
Oh, Eun-Bi (Dept. of Food Science & Biotechnology, Graduate School, Woosuk University)
Park, Jeong-Seob (Daedoo Foods Co., Ltd)
Jung, Mun-Yhung (Dept. of Food Science & Biotechnology, Graduate School, Woosuk University)
Choi, Dong-Seong (Dept. of Food Science & Biotechnology, Graduate School, Woosuk University)
Publication Information
The Korean Journal of Food And Nutrition / v.30, no.3, 2017 , pp. 491-500 More about this Journal
Abstract
Sweet potato-malt worts were prepared by using sweet potato paste of Shinyulmi and Shinjami as the main adjunct, enzymes, malt, hop, and water. We brewed low-malt beers of the lager- or ale-type by using these worts and inoculating bottom and top fermenting yeast, respectively. Moreover, the componential and functional characteristics of the resulting beers were evaluated. During saccharification of sweet potato, the addition of an enzyme agent containing ${\alpha}-amylase$ caused an improvement in filterability and an increase of total sugar. The sugar content of sweet potato-malt wort which was prepared by the addition of 0.1% enzyme agent containing ${\alpha}-amylase$ and a three-step infusion procedure was $13.5^{\circ}Brix$ adequate for beer brewing. The polyphenol and anthocyanin contents of Shinjami beer were increased with increasing content of the paste, and also increased DPPH and ABTS radical scavenging activities. But in Shinyulmi beer it were decreased. A strong correlation was obserbed between antioxidave activities and polyphenol and anthocyanin contents of sweet potato beers. In all lager- and ale-type low-malt beers using 41.6% of Shinjami pastes, sensory attributes very similar to those of 100% malt beer were obtained and they were very good as they had unique red color.
Keywords
sweet potato; sweet potato beer; low-malt beer; beer-like beverage; antioxidative activity;
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Times Cited By KSCI : 4  (Citation Analysis)
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