红曲霉菌的筛选及其在液态食醋酿造中的应用Screening of Monascus Strain and Its Application in Liquid Vinegar Brewing
杜琳琳,赵祥颖,刘丽萍,黄艳红,王新文,李梦真,刘建军
摘要(Abstract):
以大米糖化能力为指标,从红曲米醋传统发酵剂乌衣红曲中分离获得一株红曲霉ZSM1,研究优化了其液态培养产酶条件和酶特性。以大米为主要原料,酒精发酵采用酿酒酵母SFH-JM12,研究了以红曲霉ZSM1发酵液作为糖化剂对液态米醋风味品质的影响,以传统液态米醋酿造糖化剂为对照组,研究比较了发酵米醋中游离氨基酸、有机酸、风味化合物等组成与含量,并进行了感官品评。结果表明,以红曲霉ZSM1作为糖化剂,提高了产品中有机酸含量,乳酸含量达到1.11 g/dL,琥珀酸含量达到1.81 g/dL;具有鲜味的谷氨酸含量显著提高,浓度最高达115.97 mg/g,比对照组提高了16.45倍。甜味氨基酸如丝氨酸含量由4.23 mg/g增加到140.17 mg/g,苏氨酸含量由37.98 mg/g增加到382.34 mg/g;显著提高了产品中甲酸-2-甲基丁酯、乙酸丙酯、2,3-戊二酮等芳香化合物的含量,且产品酸而不涩,刺激性气味显著减弱,香气浓郁,具有典型的醋香,红曲霉ZSM1菌株的应用改善提升了液态米醋的风味品质。
关键词(KeyWords): 红曲霉;乌衣红曲;米醋;风味物质
基金项目(Foundation): 山东省乡村振兴科技创新提振行动计划项目(2022TZXD0029);; 齐鲁工业大学(山东省科学院)科教产重大创新专项(2022JBZ01-08)
作者(Author): 杜琳琳,赵祥颖,刘丽萍,黄艳红,王新文,李梦真,刘建军
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