The moisture content of fresh vegetables can reach 60-96%, but it will gradually lose water and wilting during storage and transportation after harvest, which will result in the continuous reduction of product weight and direct economic loss. In addition, dehydration can also cause product loss. In general, wilting and shrivelling occur when vegetables lose 5% water, and some of them do not reach the level of wilting, but water loss has affected its taste, crispness, color and flavor.
There are some exceptions, such as onions and garlic should be properly aired before storage to accelerate the drying of the scales and promote product dormancy; the cabbage should be moderately dry before storage, so that the leaves slightly lose water, can reduce the freezing point and improve the ability to resist cold.
Measures to prevent water loss after harvesting vegetables are as follows:
First, packaging, waxing or coating
The easiest way to reduce the loss of water in vegetables is to use a plastic film or other waterproof material to cover the product, or to put it in a bag, box, or carton. Polyethylene film is a better waterproof material. However, it must be noted that packaging reduces the water loss of the product while also reducing the cooling rate of the product. In addition, the water absorption capacity of packaging materials can not be ignored. Packaging with compound wax or rosin can prevent the packaging from absorbing water. Although the cost is high, it has practical value in the business. It is also possible to wax or paint the surface of the product and then add appropriate packaging to prevent the product from losing water.
Second, increase the air humidity
Another effective way to reduce the loss of water in vegetables is to increase the relative humidity of the air. However, high humidity is beneficial to the growth of bacteriolytic enzymes and can be used in combination with fungicides. Increase the air humidity The automatic humidifier can be used to spray fog or steam into the storage tank. It is also possible to sprinkle water on the ground or hang the wet grass screen in the storage tank, or to increase the humidity of the evaporator condensation tube to keep it below the storage temperature 2-3 Within the range of °C. In short, keeping the relative humidity in the warehouse at about 95% can prevent the product from losing water.
Third, proper ventilation
Whether it is a mechanical or natural ventilation warehouse, adequate ventilation is necessary, it can take away the heat load inside the warehouse, and prevent the temperature inside the warehouse from being uneven, but it should try to reduce the wind speed, wind speed of 0.3-3 m/s. There is little effect on the moisture evaporation of the product.
Fourth, use the sandwich cold storage
The storehouse of the sandwich cold storehouse consists of two walls, with a cold air circulation in the middle, the outer wall is both heat-insulating and moisture-proof, the inner wall is not insulated, and the evaporator is placed between the two walls, and the conduction is performed between the two walls. Hot swap. Since the evaporator is not in the reservoir, it will not capture the moisture in the product and it will be frosted. The humidity inside the reservoir is high, which prevents the product from losing water.
Preservation of vegetables is an important aspect of improving quality, and the products must be properly treated according to the circumstances to effectively maintain their optimal freshness.
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What is the pet scanner?
[Pet Scanner] involves high-tech innovation projects of medicine, bio-informatics, electrical engineering and other sciences. Using the quantum medicine as the theoretical basis, it applies the advanced electronic equipment to collect the weak magnetic field of animal cells for scientific analysis, thereby analyzing and determining the tested animal's health status and main problems and
putting forward standard prevention recommendations. [Pet scanner] is individualized guide of health care consultation for full animal body and forward health science, and has the advantages of completeness, non-invasiveness, practicality, simplicity, fastness, economy, easy popularization, etc. With the depth and development of scientific research, it will make a greater contribution for the cause of animal health, having a broad development and application prospect.
Principle of quantum analyzer:
The animal body is the aggregates of a large number of cells which are in continuous growth, development, differentiation, regeneration and apoptosis, and the cells constantly self-renew through its own division. In the process of cell division and growth, those charged bodies of atomic nucleuses constituting atoms as the basic unit of cell and the electrons outside the nucleus are in constant high-speed movement and changing, thereby constantly emitting electromagnetic waves.
The electromagnetic wave signals emitted by the animal body represent the specific state of the animal body, and the emitted electromagnetic wave signals are different under the different conditions of the human body, such as health, sub-health, disease, etc. If we can determine these specific electromagnetic wave signals, we can determine the status of the body's life.
Quantum medicine considers that the most fundamental reason of falling sick is that the spin of electrons outside the atomic nucleus and the orbit change, thereby causing the change of atoms constituting a material, the change of small biomolecules, the change of big biomolecules, the change of all the cells and finally the change of organs. Because the electron is a charged body,
when the spin of electrons outside the atomic nucleus and the orbit change, the electromagnetic wave emitted by the atoms will change. The energy o f the electromagnetic wave changes caused by the changes of the animal body's diseases and physical changes in the nutritional status is extremely weak and usually is only nano gauss to microgauss. The frequency and energy of the
weak magnetic field of hair determined directly or by holding a sensor compare with the resonance spectra of standard quantum of diseases and nutrition indicators set in the instrument after the frequency and energy are amplified by the instrument and processed by the computer, and then the corresponding quantum value being from negative to positive is output. The size of the
quantum value indicates the nature and extent of the disease and the nutrition levels. Finally, the test results are resolved by clinicians. It's similar to the principle of listening to broadcasting from the radio. There are many radio waves in the air. If you want to listen to some designated broadcasting, you can transfer the radio to the corresponding frequency, at this moment, resonance occurs, so that you can listen to this broadcasting. Quantum resonance uses this principle for testing.
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