• Talking about the fast freezing of food

    Talking about the fast freezing of food

    Rapid freezing refers to a method in which the food quickly passes through the maximum ice crystal formation zone of -1 to -5 degrees Celsius, and the average temperature reaches minus 18 degrees Celsius or lower. The rapid freezing must ensure that the various physical or The chemical change can ac...

  • The influence of air pressure on the speed of food freezing

    The influence of air pressure on the speed of food freezing

    The results of the research on the influence of air pressure on the speed of food freezing show that: under a certain pressure, the food freezing curve can be divided into three sections: 1. Cooling section: the cold mass is cooled from the initial state to the ice crystallization zone. At this stag...

  • Determination of Amino Acids in Frozen Vegetables

    Determination of Amino Acids in Frozen Vegetables

    Take 10 g of the sample, grind it into a slurry with a mortar, add 10 mL of distilled water, 1 mL of 0.01 mol/L sodium hydroxide solution, and cool in a boiling water bath for 30 minutes. Draw 2 mL of the clear sample solution, put them in 25 mL volumetric flasks, add water to make up to 4.0 mL, and...

  • How to deal with the raw materials of frozen vegetables?

    How to deal with the raw materials of frozen vegetables?

    In the West, after World War II, quick-frozen vegetables developed rapidly. my country bought equipment from foreign countries in the 1970s, began processing and exporting. Mass production started in 1980. Recently, both export and internal sales have greatly increased. Present Only good quality raw...

  • Why use the fastest speed to freeze vegetables?

    Why use the fastest speed to freeze vegetables?

    Under normal circumstances, it is often felt that when quick-frozen vegetables are made, they pass through the largest ice crystal formation zone within 30 minutes, so that its core temperature quickly meets the freezing requirements. This is called quick freezing, and it is completed within a few m...

  • What is the processing procedure for quick-frozen vegetables?

    What is the processing procedure for quick-frozen vegetables?

    When making quick-frozen vegetables, you can proceed as follows: 1. Selection and cleaning of raw materials Through selection, remove worms, rotten, too old, withered vegetables that are not suitable for making vegetables, and then put them in cold water to wash several times to remove impurities su...