Abstract
In order to improve the quality of foxtail millet wine, zymological properties by isolated strains from Nuruk were investigated. Saccharomyces sp Y5-1 as brewing yeast, Aspergillus sp. M6-3, Aspergillus awamori 6970, and Aspengillus usamii mut. shirousamii 6959 (KCTC) as saccharifying molds were used, respectively. Acid content, soluble solids, color (b) and alcohol contents were increased during fermentation. Ethanol concentration of millet wine made with Nuruk by Aspergillus awamori 6970 and Aspergillus usamii mut. shirousamii 6959 were higher than the other, 10.6 and 10.1% respectively. Citric acid was only detected on $1{\sim}2$ day starting fermentation. Oxalic acid, lactic acid and acetic acid of millet wine were high in the wine made of Nuruk by Aspergillus usamii mot. shirousamii 6959, Aspergillus awamori 6970 and traditional Nuruk, respectively. During fermentation, glucose and xylose was higher than the others. Xylose was increased, but most of other sugar were decreased during fermentation. Acetone, ethyl acetate, methanol, ethanol, n-propanol, iso-buthanol and iso-amyl alcohol were detected In the wine made with Nuruk by Aspergillus awamori and Aspergillus usamii mut. shirousamii, iso-imyl alcohol and ethanol were high. On sensory evaluation, the wine made with Nuruk by Aspergillus usamii mut. shirousamii was the best on color and taste.
제주민속 좁쌀주의 품질향상을 위하여 누룩으로부터 분리한 우수균주를 이용하여 양조특성을 검토하였다. 양조효모로 Saccharomyces sp Y5-1를, 그리고 당화균으로 Aspergillus oryzae M6-1, Aspergillus awamori 6970, Aspergillus usamii mut. shirousamii 6959를 각각 사용하였다. 좁쌀주의 양조에서 발효기간 중에 총산, 가용성 고형물, 색도, 에탄올 함량은 증가하였다. 에탄올 함량은 Aspergillus awamori 6970, Aspergillus usamii mut. shirousamii 6959 누룩구가 각각 10.6%, 10.1%로 높았다. Citric acid는 발효 $1{\sim}2$일에만 검출되었고, tartaric acid는 발효 1일에 시판 누룩구에서만'51.8 ppm 검출되었다. 유기산 중에 대부분을 차지하는 lactic acid는 Aspergillus awamori 6970 누룩구, acetic acid는 시판 누룩구에서 가장 많았다. 발효 중에 xylose, arabinose, glucose, maltose가 검출되었고, glucose와 xylose가 많았다. 휘발성 향기성분으로는 acetone, ethyl acetate, methanol, ethanol, n-propanol, iso-butanol, iso-amyl alcohol이 검출되었다. 좁쌀 주의 관능검사 결과, 색과 맛에서 Aspergillus usamii mut. shirousamii 누룩구가 좋았으며, 향기에서는 서로 비슷한 기호도를 나타내었다.