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Why is temperature important when storing food?
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gastronomy
A common rice dish of Japanese cooking is sushi. To make a type known as maki-zushi, a sheet of seaweed is spread with rice flavored with vinegar. Seafood or vegetables and garnishes are then placed on top. Finally, the whole sheet is rolled into a cylinder and sliced.
Temperature is the most critical parameter in food storage because it directly regulates the rates of chemical, enzymatic, and microbial reactions that cause food to deteriorate.1
Controlling Spoilage Mechanisms
- Microbial Growth: Bacteria are highly sensitive to temperature, which dictates their growth rates. By storing food at low temperatures, you can significantly slow or inhibit the reproduction of bacteria that lead to spoilage.2
- Enzymatic Activity: Enzymes act as biological catalysts that continue to function after harvest or slaughter, often leading to ripening, rotting, or tissue breakdown. Controlling temperature helps maintain the balance of these reactions and prevents premature degradation.3
- Chemical Deterioration: Reactions such as the Maillard reaction—which causes browning and off-flavors—are temperature-dependent. Lowering the temperature minimizes these quality losses.41
Best Practices
Most foods benefit from storage at a constant, low temperature, typically below 4 °C (40 °F), to retard deterioration. However, it is important to note that refrigeration cannot improve decayed food; it only slows the process of spoilage. Additionally, some items, such as tropical fruits, may be damaged by excessively low temperatures.51