壳聚糖纳米乳剂对火龙果保鲜效果分析  

Analysis of Preservation Effect of Chitosan Nanoemulsion on Pitaya

作　　者：郎丹 夏秀红 张彩云 陈思妤 杨润雨 马宁 牛荣丽[2] 唐健红[1] 杜志棍 LANG Dan;XIA Xiuhong;ZHANG Caiyun;CHEN Siyu;YANG Runyu;MA Ning;NIU Rongli;TANG Jianhong;DU Zhigun(College of Chemical Engineering,Huaqiao University,Xiamen 361021,China;School of Medicine,Huaqiao University,Quanzhou 362021,China;Quanzhou Green Valley Ecological Agriculture Limited Company,Quanzhou 362011,China)

机构地区：[1]华侨大学化工学院,福建厦门361021 [2]华侨大学医学院,福建泉州362021 [3]泉州市绿谷生态农业有限公司,福建泉州362011

出　　处：《华侨大学学报（自然科学版）》2024年第3期339-350,共12页Journal of Huaqiao University(Natural Science)

基　　金：福建省个人/团队特派员项目(2023年度);华侨大学人才引进项目(600005-12B0087)。

摘　　要：为了检测实验室自制壳聚糖纳米乳剂的保鲜效果,测定其保鲜的火龙果在贮藏期生理生化等指标。结果表明:壳聚糖纳米乳剂能维持可溶性糖和可滴定酸的质量分数,壳聚糖纳米乳剂(CS)组可溶性糖和可滴定酸的质量分数始终高于空白对照(CK)组(P<0.05);壳聚糖纳米乳剂能减慢Vc的氧化分解,贮藏3~7 d时,CS组的Vc质量分数明显高于CK组(P<0.05);壳聚糖纳米乳剂可增强1,1-二苯基-2-三硝基苯肼(DPPH)自由基清除能力,贮藏9 d时,CS组DPPH自由基清除率达到最大值19.69%,显著高于CK组的6.15%(P<0.05);在可溶性固形物质量分数、pH值和抑菌等方面,CS组与CK组具有不同程度的差异,贮藏11 d时,CK组腐烂率为93.33%,而CS组为66.67%。In order to test the preservation effect of self-made chitosan nanoemulsion in the laboratory,the physiological and biochemical indicators of the preserved pitaya during storage were determined.The results showed that chitosan nanoemulsion could maintain the mass fraction of soluble sugar and titratable acid,and the mass fraction of soluble sugar and titratable acid in the chitosan nanoemulsion(CS)group were consistently higher than those in the blank control(CK)group(P<0.05).Chitosan nanoemulsion could slow down the oxidative decomposition of Vc,and the mass fraction of Vc in the CS group was significantly higher than that in the CK group(P<0.05)when stored for 3-7 d.Chitosan nanoemulsion could enhance free radical scavenging ability of 1,1-diphenyl-2-trinitrophenylhydrazine(DPPH),and the DPPH free radical scavenging rate in the CS group reached its maximum value of 19.69%when stored for 9 d,significantly higher than that of 6.15%in the CK group(P<0.05).There were varying degrees of differences between the CS group and the CK group in terms of soluble solid mass fraction,pH value and antibacterial activity.When stored for 11 d,the decay rate in the CK group was 93.33%,while the CS group was 66.67%.

关 键 词：壳聚糖 纳米乳剂 火龙果 保鲜 

分 类 号：TS255.36[轻工技术与工程—农产品加工及贮藏工程]