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Preservatives are chemical or natural substances added to food in order to inhibit the growth of microorganisms and extend shelf life without compromising the safety or quality of the product. In food microbiology, preservatives play a critical role in controlling the growth of spoilage organisms such as bacteria, molds, and yeasts, as well as pathogenic microorganisms that may pose health hazards. Based on their origin and mechanism, preservatives can be classified into several categories. One classification divides preservatives into natural and chemical preservatives. Natural preservatives include compounds like salt, sugar, vinegar, and essential oils that have been used traditionally to preserve foods. Chemical preservatives are synthetic or purified compounds that are intentionally added to food, including benzoates, sorbates, nitrates, and sulfites. Another method of classification groups preservatives according to their mode of action. __________ _________ ______ __________ _______ _______ ___ ___ ______ ________ ___ __________.
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