Ja-Won Shin 1, Young-Hun Kim 1, Jae-Ho Kim 2, Kwang-Chul Na 3 and Jong-Soo Lee
1Department of Biomedicinal and Bioechnology, Paichai University, Daejeon 302-735, Korea
2Korea Food Research Institute, Seongnam 463-746, Korea
3Department of Food Nutrient and Culinary, Chosun University College of Science & Technology, Gwangju 501-744, Korea
Correspondence to biotech8@pcu.ac.kr
Korean Journal of Mycology (Kor J Mycol) December 30, 2013, 41(4):255-260.
https://doi.org/10.4489/KJM.2013.41.4.255
Received: October 30, 2013; Revised: December 5, 2013
Published: December 30, 2013.
© The Korean Society of Mycology
This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/3.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.
In order to develop new valuable pear marc nuruk and further, reduce environmental pollution by pear marc from pear juice processing, we prepared pear marc nuruk by incubation of Aspergillus oryzae into pear marc containing 50% of moisture at 30 oC for 7 days. α-Amylase and glucoamylase activities of the pear marc nuruk were 320.2 IU and 442.8 IU, respectively and its acidic protease activity was showed 142.6 IU. After brewed makgeolli by using the pear marc nuruk, cooked rice and Saccharmyces cerevisiae, its physicochemical characteristics was investigated. Ethanol content of pear marc nuruk–makgeolli was 6.8% after fermentation at 25 oC for 10 days and also pear marc makgeolli showed 45.6% of antihypertensive angiotensin I-converting enzyme (ACE) inhibitory activity. In conclusion, pear marc nuruk had high amylase activity and pear marc-makgeolli had also good fermentation characteristics and antihypertensive ACE inhibitory activity. Therefore, it has the potential to become a new nuruk for brewing makgeolli.
Aspergillus oryzae, Fermentation condition, Makgeolli, Nuruk, Pear marc