2. Preserve with nitrogen. If the food bag is filled with inert nitrogen, there is no place for active oxygen, and the food will not be oxidized by oxygen. Another important reason for using nitrogen is that nitrogen accounts for a large proportion in the air, so the cost of nitrogen is low, so food packers choose nitrogen to prevent corrosion. So nitrogen can be used to keep shrimp fresh at room temperature.
3. Frozen storage. After buying the shrimp, peel it off and put it in a mineral water bottle. When it is full, unscrew the lid and put it in the refrigerator for freezing. When it is taken out in winter, the sticky juice of shrimp is still hanging on it, which is very fresh.
Extended data:
Shrimp is low in calories, but its nutritional value is not low. It is not difficult to see fresh shrimp in health dishes. Fresh shrimp contains trace elements such as phosphorus, iodine and potassium, protein and vitamins, which can help patients recover.
Fresh shrimp contains magnesium which can regulate the cardiovascular system, protect the heart, reduce the cholesterol content in blood, dilate arterial blood vessels and prevent arteriosclerosis, thus effectively reducing the incidence of myocardial infarction and hypertension.
Fresh shrimp contains a very effective antioxidant, namely astaxanthin, which can not only resist aging, but also eliminate jet lag. Look at the high content of astaxanthin, you can look at the red surface of shrimp. The redder, the higher the astaxanthin content. ?
References:
Baidu encyclopedia-shrimp