Application of Prochloraz-nano-titanium Dioxide Complex Fresh-keeping Agent in Refrigeration of Dioscorea alata Lirm. sp.

Prochloraz diluents( 450 ×,475 ×,500 ×) were added with different concentrations of nano-titanium dioxide( Ti O2)( 0. 8%,1. 0%) respectively to prepare complex fresh-keeping agents,which were applied in the refrigeration of Dioscorea alata Lirm. sp. With rot index,weight loss rate,browning degree( BD),total soluble solids( TSS) content,malondialdehyde( MDA) content,polyphenol oxidase( PPO) activity and peroxidase( POD) activity,DPPH· scavenging rate as evaluation indexes,the preservation effect of the prepared freshkeeping agents on D. alata during the cold storage period was analyzed. The results showed that prochloraz added with nano-titanium dioxide significantly prolonged the storage life,reduced the rot rate and weight loss rate,and slowed the loss of pulp of D. alata. The preservation effect of complex fresh-keeping agent of prochloraz diluent( 475 ×) and nano-titanium dioxide( 1. 0%) was better than that of other treatments.

脚板薯的研究进展

综述近年来脚板薯在生物学特性、化学成份、药理及临床研究和产品开发等方面的研究进展,并进行较为全面的介绍与分析,为脚板薯植物资源的研究和开发利用提供一定的参考。

响应面法优化脚板薯皂苷提取工艺

[目的]优化脚板薯皂苷的最佳提取工艺。[方法]探讨提取温度、提取时间、料液比和乙醇浓度对脚板薯皂苷提取率的单因素影响。在此基础上,采用响应面分析方法,进一步研究各自变量及其交互作用对脚板薯皂苷提取率的影响,并对其工艺参数进行优化。[结果]脚板薯皂苷提取的最佳工艺条件为提取温度76℃、提取时间1.5 h、乙醇浓度90%、料液比1∶30(m/v),在此最优工艺条件下,脚板薯皂苷提取率达0.291%。[结论]该研究可为脚板薯皂苷的工业化生产提供理论指导。