The pellicle-forming yeast could cause the quality deterioration of wine. In this study, a pellicle-forming strain Hmp-1 was isolated from the spoilage blackberry wine, and identified as Pichia membranifaciens based o...The pellicle-forming yeast could cause the quality deterioration of wine. In this study, a pellicle-forming strain Hmp-1 was isolated from the spoilage blackberry wine, and identified as Pichia membranifaciens based on the morphology and partial nucleotide sequence of 26S rDNA. The effects of fermentation conditions （ethanol, sulfur dioxide, sugar, and temperature） on the growth of P. membranifaciens strain Hmp-1 and Saccharomyces cerevisiae strain FM^S-115 （a strain used for the blackberry wine fermentation） were investigated, respectively. The results indicated that Hmp-1 had lower resistance to these factors compared to FM-S-115, and the growth of Hmp-1 was completely inhibited by 10% （v/v） or 50 mg L-~ SO2 during the fermentation of blackberry wine. These results suggested that Hmp-1 could effectively be controlled by increasing ethanol or SO2 concentration during the fermentation and storage of blackberry wine. Furthermore, the analysis based on gas chromatography-mass spectrometry （GC-MS） showed that Hmp-1 remarkably decreased kinds of volatile compounds in blackberry wine, especially aldehydes and esters. In addition, some poisonous compounds were detected in the blackberry wine fermented by FM-S-115 and Hmp-l. These results suggested that Hmp-1 was a major cause leading to the quality deterioration of blackberry wine.展开更多
果酒中的蛋白质是果酒产生浑浊沉淀的主要原因之一。本研究分析了常用的几种单一澄清剂及复合澄清剂对黑莓果酒中蛋白质含量的影响。响应面分析结果表明最佳澄清剂为明胶-单宁复合澄清剂,其添加量为明胶1.32 m L/100 m L,单宁0.41 m L/1...果酒中的蛋白质是果酒产生浑浊沉淀的主要原因之一。本研究分析了常用的几种单一澄清剂及复合澄清剂对黑莓果酒中蛋白质含量的影响。响应面分析结果表明最佳澄清剂为明胶-单宁复合澄清剂,其添加量为明胶1.32 m L/100 m L,单宁0.41 m L/100 m L,此时黑莓酒的蛋白质含量降至96.96 mg/L,蛋白质的去除率达到25.0%,透光率达到91.8%,总酚含量下降了35.8%,总糖含量以及色度变化微弱。展开更多
从本实验室保存的23株来源于自然发酵果酒的酵母中筛选到1株β-葡糖苷酶活性较低、生长快且不产膜的酵母FY4,经18S r DNA序列分析,该菌株鉴定为酿酒酵母(Saccharomyces cerevisiae)。利用该菌株发酵黑莓果酒,通过单因素和正交试验考察...从本实验室保存的23株来源于自然发酵果酒的酵母中筛选到1株β-葡糖苷酶活性较低、生长快且不产膜的酵母FY4,经18S r DNA序列分析,该菌株鉴定为酿酒酵母(Saccharomyces cerevisiae)。利用该菌株发酵黑莓果酒,通过单因素和正交试验考察了发酵温度、果胶酶用量、加糖量和接种量对黑莓果酒中花色苷含量的影响。结果表明,当酵母FY4接种量为2%,发酵温度为32℃,加糖量为14%,果胶酶添加量为0.22%时,发酵后黑莓果酒中的花色苷含量达到(406.31±5.64)mg/L,是相同条件下利用商业酿酒酵母PHYTHM.nsac发酵的黑莓果酒中花色苷含量的1.53倍。展开更多
基金supported by the Natural Science Foundation of Jiangsu Province,China (BK20170603)
文摘The pellicle-forming yeast could cause the quality deterioration of wine. In this study, a pellicle-forming strain Hmp-1 was isolated from the spoilage blackberry wine, and identified as Pichia membranifaciens based on the morphology and partial nucleotide sequence of 26S rDNA. The effects of fermentation conditions （ethanol, sulfur dioxide, sugar, and temperature） on the growth of P. membranifaciens strain Hmp-1 and Saccharomyces cerevisiae strain FM^S-115 （a strain used for the blackberry wine fermentation） were investigated, respectively. The results indicated that Hmp-1 had lower resistance to these factors compared to FM-S-115, and the growth of Hmp-1 was completely inhibited by 10% （v/v） or 50 mg L-~ SO2 during the fermentation of blackberry wine. These results suggested that Hmp-1 could effectively be controlled by increasing ethanol or SO2 concentration during the fermentation and storage of blackberry wine. Furthermore, the analysis based on gas chromatography-mass spectrometry （GC-MS） showed that Hmp-1 remarkably decreased kinds of volatile compounds in blackberry wine, especially aldehydes and esters. In addition, some poisonous compounds were detected in the blackberry wine fermented by FM-S-115 and Hmp-l. These results suggested that Hmp-1 was a major cause leading to the quality deterioration of blackberry wine.
文摘果酒中的蛋白质是果酒产生浑浊沉淀的主要原因之一。本研究分析了常用的几种单一澄清剂及复合澄清剂对黑莓果酒中蛋白质含量的影响。响应面分析结果表明最佳澄清剂为明胶-单宁复合澄清剂,其添加量为明胶1.32 m L/100 m L,单宁0.41 m L/100 m L,此时黑莓酒的蛋白质含量降至96.96 mg/L,蛋白质的去除率达到25.0%,透光率达到91.8%,总酚含量下降了35.8%,总糖含量以及色度变化微弱。
文摘从本实验室保存的23株来源于自然发酵果酒的酵母中筛选到1株β-葡糖苷酶活性较低、生长快且不产膜的酵母FY4,经18S r DNA序列分析,该菌株鉴定为酿酒酵母(Saccharomyces cerevisiae)。利用该菌株发酵黑莓果酒,通过单因素和正交试验考察了发酵温度、果胶酶用量、加糖量和接种量对黑莓果酒中花色苷含量的影响。结果表明,当酵母FY4接种量为2%,发酵温度为32℃,加糖量为14%,果胶酶添加量为0.22%时,发酵后黑莓果酒中的花色苷含量达到(406.31±5.64)mg/L,是相同条件下利用商业酿酒酵母PHYTHM.nsac发酵的黑莓果酒中花色苷含量的1.53倍。
