Vacuum pretreatment is an important means to achieve rapid cooling of fruits and vegetables
Vacuum pretreatment is an important means to achieve rapid cooling of fruits and vegetables. After vacuum pretreatment fresh fruits and vegetables can be directly into the market or users, but also as a fruit or vegetable drying or freeze-drying pre-processing work, extend the preservation period of about the use of high temperature library can also be long-term preservation. Vacuum pretreatment is characterized by its fast cooling speed, which is only used for cooling evenly in 20 seconds, and it has the characteristics of clean and hygienic vacuum environment sterilization or inhibition of bacterial growth, large amount of economical, etc. It is the preferred modern pretreatment method in the cold chain cycle. In addition to the role of rapid pre-cooling, vacuum pretreatment also has the effect of inhibiting microorganisms to maintain the quality of food during shelf life, and therefore has important significance for the preservation of fresh meat.
Based on the research of fresh-keeping and fresh-keeping of fresh beef, the research on the effect of vacuum pretreatment combined with air-conditioning technology on the preservation of fresh beef was carried out to provide further technical basis for the low-temperature shelf life of Yan-Yuan Fresh Beef. In the previous experiments, the samples treated with simple atmosphere modification or with preservatives had the phenomenon of water seepage in the tissues, and with the prolongation of the storage period, the water seepage increased. This problem was solved in the vacuum pretreatment, the sensory quality of all samples was significantly improved, and the shelf life was extended, and some samples still belong to the acceptable range of secondary meat. The lower the pretreatment pressure, the less obvious the change in sensory quality and the better the sensory evaluation result. However, the pretreatment pressure treatment sample had a little ice slag after pretreatment, so the pretreatment pressure should be 60. The results of the determination of different pre-treatment final temperature values ​​can be seen in the table. All the vacuum-pretreated samples have better color differences within the storage period.
Good quality custom pizza boxes without handle.
Pizza Box Without Handle,Custom Pizza Box,Print Pizza Box,Microwave Pizza Box
JINAN HUAFENG PRINTING CO., LTD , https://www.huafengpaperbag.com