Fresh fruits and vegetables are fresh products

Fresh fruits and vegetables are fresh, rich in water and need to breathe. They are still living organisms. On the surface, the vegetables listed appear to have ceased life activities, but in fact they are still undergoing complex physiological, biological, and physical changes. At the same time, with these changes, the nutritional composition and edible value of fruits and vegetables have also undergone corresponding changes. Fresh fruits and vegetables are respirators. The respiration process of fruits and vegetables is to absorb oxygen from the surrounding air. The organic matter in the tissues is slowly decomposed into carbon dioxide and water under the action of enzymes. The process of releasing heat is a process of nutrient consumption. For some fresh fruits, the fruit undergoes a respiration process after leaving the plant and completes its post-ripening functions. The flavor and physiological characteristics of the fruit undergo a series of changes, which is of great significance to the improvement of fresh fruits. However, when fresh fruit ripens, it loses its storability. Fresh fruits and vegetables are prone to moisture evaporation and condensation. The evaporation and condensation of water that occurs in fruits and vegetables is a physical change. Evaporation will reduce the internal water content of fruits and vegetables, which not only makes the appearance of vegetables appear spasmodic and affects their fresh quality, but also strengthens the respiration of fruits and vegetables and increases the consumption of nutrients. Condensation is caused by rapid changes in air temperature and humidity in the environment of fruits and vegetables. The phenomenon of condensation of fine water droplets on the surface of fruits and vegetables, commonly known as "sweat". After dew condenses on the surface of fruits and vegetables, they become very moist, creating suitable conditions for the reproduction of microorganisms. Fruits and vegetables are prone to rot and spoilage. In view of this, fresh fruits and vegetables are alive and are fresh commodities. Therefore, fresh fruits and vegetables cannot be considered as general commodities. Appropriate measures must be taken to create a good storage environment and control the life activities of fresh fruits and vegetables, so that fresh fruits and vegetables can fully exert their edible value.