Wang Hai'ou

Abstract: Modified atmosphere packaging (MAP) storage has become a useful technique for extending the shelf life of fruit and vegetables. However, the success of MAP depends on many factors, including types of fresh products, storage conditions, and the characteristics of the packaging films. To achieve the optimal gas composition in the package headspace and improve the postharvest quality of fresh produce, the packaging film with appropriate barrier properties needs to be selected. This study aimed to predict the film thickness by applying produce respiration rate and package film permeability data measured in given product weight and storage conditions. An available film (eg, 25‐μm‐thick low‐density polyethylene) was used to pack fresh produce, and the respiration rate of fresh produce and in‐package O2 and CO2 concentrations at steady state were measured. Permeability of the film was calculated based on mass balance, and the thickness of the film could be predicted if the recommended target O2 and CO2 concentration was obtained from the literature. To validate the predicted thickness value, an experiment was conducted by packaging fresh table grapes in bags of the predicted thickness. The effect of packaging with different film thicknesses on the quality of the fruit was determined. The results showed good agreement between the predicted and the experimental in‐bag O2 and CO2 concentrations, and the MAP with predicted thickness (90 μm) film was more effective in maintaining postharvest quality of grapes during low‐temperature storage than the thinner films (30 and 60 μm) and the control.

TL;DR: In this paper, an integrated radiation vacuum freeze-dry device and method, further related to a corresponding method, is described. But this method is not suitable for various food materials, such as food materials which contain less water, are compact in texture or have wax coat surfaces.

TL;DR: In this paper, the authors proposed a non-constructive test grading method for Hericium erinaceus detection, which includes steps of: extracting a characteristic parameter from a Herica erinacea image, establishing a corresponding discrimination function, and performing herica erinaus nondestructive test grade.

TL;DR: The utility model relates to a continuous type vacuum spraying freeze drying equipment belonging to biological medicine and food processing technology field as discussed by the authors, which is equipped with the feed liquid atomizer including atomizing freezing room, the top of atomising freezing room and the cold-trap coil pipe.