食品科学 ›› 0, Vol. ›› Issue (): 0-0.

• 生物工程 •    下一篇

苹果酵素天然发酵过程中代谢产物研究

杨小幸1,周家春1,陈启明1,秦臻1,马明月2,赵黎明1   

  1. 1. 华东理工大学
    2. 重庆邮电大学
  • 收稿日期:2017-03-07 修回日期:2017-09-25 出版日期:2017-12-25 发布日期:2017-12-07
  • 通讯作者: 赵黎明 E-mail:zhaoliming@ecust.edu.cn
  • 基金资助:
    国家自然基金;重庆邮电大学科研启动基金

Studies in metabolites of apple-ferment during natural fermentation process

Xing XiaoYANGJiachun ZhouMing QiChen2,Zhen QIN2,Yue MingMa2,   

  • Received:2017-03-07 Revised:2017-09-25 Online:2017-12-25 Published:2017-12-07

摘要: 为研究苹果酵素天然发酵过程中物质代谢变化,以天然发酵过程中pH、总酸、有机酸(乳酸、醋酸、苹果酸),糖类(蔗糖,葡萄糖,果糖),乙醇,总酚含量、DPPH自由基清除率的变化进行分析。结果表明,发酵过程中pH值从5.05±0.05降至3.88±0.06,总酸、乳酸呈不断上升趋势,乙酸含量由0.018%升至0.23%,苹果酸含量在发酵14天上升至(2.45±0.18)g/L后略微下降;葡萄糖、果糖呈先升后降趋势,且二者均在发酵21d达到最大值(130.6±12.9)g/L、(177.2±0.6)g/L,蔗糖不断下降趋于0;发酵4周乙醇含量可达(6.6±1.9)%;总酚含量与DPPH自由基清除率呈先升后降趋势,均在发酵21天达到最大值(259.4±3.6)mg/L与(90.9±2.2)%,且二者呈显著正相关,相关系数为0.788(P<0.05)。

关键词: 苹果酵素,天然发酵,代谢物质,抗氧化性

Abstract: The objective of this study was to analyze changes in metabolites of apple-ferment during natural fermentation. The pH value, total titrable acid, organic acids (lactic acid, acetic acid, malic acid), sugars (sucrose, glucose, fructose), alcohol, total phenolic content and DPPH free radical scavenging ability were investigated. Results showed that pH value decreased from (5.05±0.05) to (3.88±0.06) while the total titratable acidity, lactic acid and acetic acid increased during the process; Malic acid increased to (2.45±0.18)g/L after 14 days and then decreased slowly. Glucose and fructose increased at previous 21 days and then decreased, which reached the highest(130.6±12.9)g/L, (177.2±0.6)g/L on 21thwhile the sucrose kept decreasing till to 0 on 28th; Total phenolic content and DPPH free radical scavenging ability both reached the maximum (259.4±3.6) mg/L, (90.9±2.20) % after 21 days, respectively; Furthermore, DPPH free radical scavenging activity was highly correlated with the content of phenolic compounds(r=0.788, p<0.05).

Key words: apple-ferment, natural fermentation,metabolites,antioxidant activity

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