1. Denaturation: Radiation can cause proteins to lose their natural structure, resulting in denaturation. This can alter the functional properties of proteins, such as solubility, water-holding capacity, and emulsifying properties. Denatured proteins may have lower nutritional value and may be less digestible.
2. Aggregation: Radiation can also lead to the aggregation of proteins. When proteins aggregate, they form larger complexes or clumps, which can affect the texture, appearance, and functional properties of food. Aggregation can also reduce the bioavailability of amino acids and decrease the nutritional value of the food.
3. Chemical Changes: Radiation can cause various chemical changes in proteins, including the formation of free radicals, oxidation, and cross-linking. These changes can alter the amino acid composition and nutritional value of proteins. For example, radiation can convert the essential amino acid lysine into pipecolic acid, which has no nutritional value.
4. Loss of Functional Properties: Radiation-induced changes in proteins can result in the loss of functional properties, such as enzyme activity, foaming ability, and gelation properties. This can have a negative impact on the quality and acceptability of food products.
5. Nutritional Value: Radiation can affect the nutritional value of proteins in food. The formation of free radicals and the destruction of essential amino acids can reduce the protein's overall nutritional value.
It is important to note that the effects of radiation on proteins depend on various factors, such as the radiation dose, the type of food, and the presence of other components in the food. In some cases, mild radiation treatment can be used as a food preservation technique without causing significant changes in protein quality and nutritional value. However, higher doses of radiation can have more detrimental effects on proteins.
Regulatory authorities establish guidelines for food irradiation to ensure the safety and quality of irradiated food. These guidelines specify the maximum radiation doses that are allowed for different types of food and consider the potential effects on proteins and other nutrients.
