After the mangoes are treated with preservatives, they should be stored at a temperature of no less than 13°C, either in refrigeration or controlled conditions. The exact temperature and gas composition will vary depending on the variety. Under proper storage conditions, the mangoes can last between 20 to 30 days. When the fruits are being prepared for sale, they should be brought to room temperature before leaving the warehouse. At room temperature, the fruit color remains attractive for about 1 to 2 days. However, storing mangoes at room temperature increases the risk of moisture loss, which shortens their shelf life to approximately 10 to 17 days.
During transportation, it's essential to ensure the packaging is both strong and breathable. Each box should weigh no more than 7.5 to 10 kilograms. To protect the fruit, paper inserts should be placed inside the box to separate the mangoes and provide structural support. The cartons must be loaded properly, with only one layer of mangoes per box. For the second layer, the temperature during transport should be maintained between 10°C and 13°C.
If the mangoes are not yet ripe, they need to be ripened. A common method involves using 2 grams of calcium carbide per kilogram of mangoes. The calcium carbide should be wrapped in paper and placed inside the box, ensuring it does not come into direct contact with the fruit. After sealing the box with a plastic cover, the ripening process should take place for 24 to 48 hours at a temperature of 22°C or at room temperature. This method helps accelerate the ripening process while protecting the quality of the fruit.
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Silica black is the general name of white powder X-ray amorphous silica and silicate products, mainly refers to precipitated silicon dioxide, gas phase silicon dioxide and ultra-fine silicon dioxide gel, including powder synthesis of aluminum silicate and calcium silicate, etc. Silica is porous and its composition can be expressed as SiO2·nH2O, where nH2O is in the form of surface hydroxyl groups. Soluble in caustic soda and hydrofluoric acid, insoluble in water, solvents and acids (except hydrofluoric acid). High temperature resistance, non-combustion, tasteless, odorless, with good electrical insulation.
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