With the aim of providing scientific and technological service,our team has successfully cultivated the tropical fruit Myrciaria cauliflo-ra in Longdong Village,Jiexi County,which enriched the industrial layout of the region and helped the rural revitalization.The extraction rate of polyphenols from Myrciaria cauliflora leaves was studied by supercritical extraction technology.The conditions of temperature,pressure and time were discussed.The composite film was prepared by the extract and chitosan.The properties of the composite film such as thickness,trans-parency,solubility,antioxidant and preservation were determined.The results showed that the optimal conditions for the extraction of polyphe-nols were as follows:45 ℃,25 MPa,120 min,and the extraction rate was 23.07％.The extract in the composite film improved the scavenging rate of DPPH free radical.The composite film could reduce the weight loss rate and prolong the shelf life of strawberry.
关键词
科技服务/嘉宝果/壳聚糖/复合膜/保鲜
Key words
Scientific and Technical Service/Myrciaria Cauliflora/Chitosan/Composite Film/Fresh-keeping
维普
万方数据