Li Dongdong, Ye Qingyang, Jiang Lei, Luo Zisheng
Zhejiang Key Laboratory for Agro-Food Processing, College of Biosystems Engineering and Food Science, Zhejiang University, Hangzhou, 310058, People's Republic of China.
Fuli Institute of Food Science, Zhejiang University, Hangzhou, 310058, People's Republic of China.
J Sci Food Agric. 2017 Mar;97(4):1116-1123. doi: 10.1002/jsfa.7837. Epub 2016 Jul 11.
Nano-TiO -low-density polyethylene (NTLDPE) packaging was prepared, and the effects of NTLDPE packaging on quality and antioxidant capacity of strawberry fruits were investigated.
With increased barrier properties, NTLDPE packaging quickly formed a relative lower O and higher CO air composition in comparison with LDPE. It was also more efficient in maintaining the overall quality of strawberry fruit, as reflected by lower decay rate and weight loss, as well as retarding the decrease in firmness and titratable acid. Meanwhile, reactive oxygen species (ROS) including superoxide anion and hydrogen peroxide in NTLDPE-packed fruits were 10.8% and 21.9% lower, respectively. Furthermore, the activities of antioxidant enzymes involved in ROS scavenging in NTLDPE-packed fruits were significantly higher at the later period of storage time. Anthocyanin accumulation was inhibited, whereas ascorbic acid and total phenolics contents were better retained and 1-diphenyl-2-picrylhydrazyl radical scavenging activity was 13.2% higher in NTLDPE-packed fruit by the end of storage.
These data indicate that the beneficial effects of NTLDPE packaging on postharvest quality and antioxidant capacity of strawberry are probably associated with the promotion of ROS scavenging and related antioxidant enzyme activities, and NTLDPE packaging together with refrigeration storage is a promising method for strawberry fruit preservation. © 2016 Society of Chemical Industry.
制备了纳米二氧化钛-低密度聚乙烯（NTLDPE）包装，并研究了NTLDPE包装对草莓果实品质和抗氧化能力的影响。
与低密度聚乙烯相比，随着阻隔性能的提高，NTLDPE包装能迅速形成相对较低的氧气和较高的二氧化碳气体组成。它在保持草莓果实的整体品质方面也更有效，表现为较低的腐烂率和失重率，以及延缓硬度和可滴定酸的下降。同时，NTLDPE包装果实中的超氧阴离子和过氧化氢等活性氧分别降低了10.8%和21.9%。此外，在储存后期，NTLDPE包装果实中参与清除活性氧的抗氧化酶活性显著更高。花青素的积累受到抑制，而抗坏血酸和总酚含量得到更好的保留，并且在储存结束时，NTLDPE包装果实的1,1-二苯基-2-苦基肼自由基清除活性提高了13.2%。
这些数据表明，NTLDPE包装对草莓采后品质和抗氧化能力的有益影响可能与促进活性氧清除及相关抗氧化酶活性有关，并且NTLDPE包装与冷藏储存相结合是一种很有前景的草莓果实保鲜方法。© 2016化学工业协会。
