U.S. agencies often use irradiation to kill salmonella and E. coli in fresh vegetables, but this method will affect the freshness of vegetables. American scientists announced on the 6th that they have found a new way to reduce radiation by half and kill almost all germs.
Researchers at the Texas Crop Life Research Institute in the United States found in the latest study that packaging fresh vegetables in PET bags filled with pure oxygen and then irradiating them can greatly reduce the amount of radiation to the vegetables and achieve sterilization at the same time. The food safety engineer Karman Goms, who is in charge of the study, said that routinely requiring more than 4,000 grams of radiation will kill all the bacteria on the vegetables, but with the new method, only the irradiation of 200 to 1250 Gray will be required. It kills more than 99.9% of bacteria. She said that the benefit of using a small dose of gray is that the freshness of the vegetables will not be damaged, and due to the protection of polyester film bags filled with pure oxygen, there will be no residual radiation on the vegetables, so it will not cause human health. Injury, and no odor left.
Fruit and vegetable powder also means fruit and vegetable juice powder. The making method is about first crush the fruit and vegetable to juice, then vacuum concentrate it, and then use high temperature to spray it to powder. Do not add any flavors and artificial colors. To a great extend retain the nutrition, color and flavor of plants and fruits.
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