食品冷庫的冷藏原因分析,下面小編為您分析一下:
Food cold storage of the reasons for the analysis, the following small series for you to analyze:
1.食品冷藏又稱低溫貯藏,是指在0℃或略高于食品冰點的低溫環境條件下,對食品進行貯藏。冷藏是通過抑制微生物及酶類的活動和降低食品基質中的活性,來防止食品腐敗變質,保持食品的新鮮度和營養價值。冷藏是目前效果較好、價格較低、保鮮時間校長、最普遍采用的食品貯藏方法。
1 food cold storage, also known as low temperature storage, refers to 0 degrees Celsius or slightly higher than the freezing point of food at low temperature environment, the food storage. Refrigeration is by inhibiting the activities of microorganisms and enzymes and reduce the activity of the food matrix to prevent food spoilage and maintain food freshness and nutritional value. Cold storage is the most effective and widely used food storage method at present.
2.動物性食品,如禽、畜、魚等在貯藏時很容易被細菌污染,細菌并很快繁殖,從而造成食品的腐敗。但是微生物的繁殖和酶活性的發揮,都需要適當的溫度和水分條件;環境不適宜,微生物就會停止繁殖甚至死亡,酶也會喪失催化能力,甚至被破壞。把動物性食品放在低溫條件下就可抑制微生物的繁殖和酶對食品的作用,可以貯藏較長時間而不會腐敗變質。
2 animal food, such as poultry, animals, fish, and so on in storage is very easy to be contaminated by bacteria, bacteria and soon reproduce, resulting in food spoilage. However, the reproduction of microorganisms and enzyme activities, all need appropriate temperature and moisture conditions; the environment is not suitable, microorganisms will stop breeding or even death, the enzyme will lose the catalytic ability, and even destroyed. The animal food at low temperature can inhibit the reproduction of microorganisms and the role of enzymes in food, can be stored for a long time and will not corrupt.
3.對于植物性食品,腐敗的原因是呼吸的作用。水果、蔬菜在采摘后雖然不能繼續生長,但它們仍是一個有機體,仍然有生命,有呼吸作用。低溫能夠減弱果蔬食品的呼吸作用,延長它們的貯藏期限。但溫度不能過低,否則會引起植物性食品的生理病害,甚至凍死。因此植物性食品冷藏溫度應該選擇接近其冰點但又不致使植物發生凍死現象為宜。
3 for vegetable food, the cause of corruption is the role of respiration. Fruits and vegetables can not continue to grow after picking, but they are still an organism, there is still life, there are breathing. Low temperature can reduce the respiration of fruits and vegetables, and extend the storage period of fruits and vegetables. But the temperature is not too low, otherwise it will cause physiological diseases of plant food, and even death. Therefore, plant food storage temperature should be chosen near its freezing point but also does not cause the plant freezing phenomenon is appropriate.
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