College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an 710000, China.
College of Food Engineering and Nutritional Science, Shaanxi Normal University, Xi'an 710000, China.
Food Res Int. 2021 Jan;139:109841. doi: 10.1016/j.foodres.2020.109841. Epub 2020 Oct 27.
The commercial kiwifruit juice is deficient in a theoretical basis for the control of aroma characteristics during sterilization. To investigate the different sterilization methods on the aroma of kiwifruit juice, three sterilized kiwifruit juice samples, including pasteurization (PS), high temperature short time (HTST) and high hydrostatic pressure (HHP) sterilization, were observed. Results showed that a total of 15 major aroma-active compounds were identified in fresh kiwifruit juice by combination of detection frequency (DF) analysis and odor activity value (OAV); while the changes of these aroma-active compounds during PS, HTST and HHP sterilization were further studied. Quantitative descriptive analysis (QDA) was applied to validate the sensory differences, showing fruity and grassy notes changed a lot after sterilization, and the HHP sample was similar to fresh sample (FS) in comparison of samples treated by other sterilization methods. Further partial least squares regression analysis (PLSR) coincided with the overall note. Among these aroma-active compounds, the decrease of C6 aldehydes and C6 alcohols such as hexanal, (E)-2-hexenal and 1-hexanol might result in the great change of grassy note while the change of fruity note might be well correlated with the decrease of esters such as methyl butyrate and ethyl butyrate during processing.
市售猕猴桃果汁在杀菌过程中控制香气特征方面缺乏理论依据。为了研究不同杀菌方法对猕猴桃果汁香气的影响,观察了巴氏杀菌(PS)、高温短时(HTST)和高静压(HHP)杀菌的 3 种杀菌猕猴桃果汁样品。结果表明,通过检测频率(DF)分析和气味活度值(OAV)相结合,在新鲜猕猴桃果汁中鉴定出 15 种主要香气活性化合物;进一步研究了这些香气活性化合物在 PS、HTST 和 HHP 杀菌过程中的变化。采用定量描述性分析(QDA)验证感官差异,结果表明杀菌后果香和草香发生了很大变化,与其他杀菌方法处理的样品相比,HHP 样品与新鲜样品(FS)相似。进一步的偏最小二乘回归分析(PLSR)与整体香气一致。在这些香气活性化合物中,C6 醛和 C6 醇如己醛、(E)-2-己烯醛和 1-己醇的减少可能导致草香发生很大变化,而果香的变化可能与甲酯和乙酯等酯类的减少密切相关在加工过程中。