Papers by Keyword: Keeping-Fresh

Abstract: The key of rice keeping-fresh packaging is how to control and adjust oxygen and carbon dioxide concentrations in the packaging. The gas permeability of packaging material is the main factor of adjust gas concentrations within packaging. A new method of calculating dynamic permeability of packaging material was inferred by way of integrating cross-cutting dynamic process of rice respiration and film permeability. Under normal temperature, by vacuum keeping-fresh experiments on rice, the correctness of this new method was validated. T his method has the signification in guiding people on choosing vacuum degree and on determination of keeping-fresh time. The following indexes of hydrated quantity, fatty acid, reducing sugar and viscosity were tested, and the results indicated that the shelf of rice have been prolonged more than 180 days.

Abstract: The effects of Chitosan/Nano-TiO₂ composite coating in extending postharvest life of stauntonvine and maintaining their qualities were investigated. Stauntonvine were treated by chitosan/nano-TiO₂ composite coating and chitosan coating respectively. Changes in respiration rate, ascorbic acid content, titrable acidity, soluble total sugar were measured and compared. Compared with chitosan coating, the application of Chitosan/Nano-TiO₂ composite coating could reduce the respiration rate and the loss of ascorbic acid, and also could increase the titrable acidity, soluble total sugar, and partially inhibited decay of fruit during storage.