Classify the preservatives? Explain the mode of action of any two preservatives.

Preservatives are substances used to prevent or delay the spoilage of food products by inhibiting the growth of microorganisms, such as bacteria, molds, and yeasts, or by preventing enzymatic reactions. In food microbiology, preservatives are classified based on their origin, chemical nature, or mode of action. The major classifications of food preservatives are:

1. Chemical Preservatives: These include organic acids, salts, and synthetic compounds that inhibit microbial growth or alter the environment of the food to prevent spoilage. Examples include sodium benzoate, sulfur dioxide, and nitrates.

2. Natural Preservatives: Derived from natural sources, these preservatives have minimal or no chemical alteration. They are used to maintain the safety and quality of food. Common examples include vinegar, salt, sugar, and certain essential oils.

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