Food Preservaion

method actings of aliment preservation would help to prevent a grownup amount of food being wasted. Some of the preservation methods non only reduce the nutritive value of foods but causes prejudicious effect directly.
Preservative methods vary according to the food items and standard of the items to be preserved. There are household and commercial methods of food preservation available. The principles of food preservation can be broadly speaking classified into two types. They are -
Bactericidal method: In these methods most of the micro-organisms are killed. Examples of bactericidal methods of preservations are cooking, canning, pasteurisation, sterilisation, irradiation and so forth
Bacteriostatic method: The principle of this method is prevention of multiplication of micro-organisms. This may be achieved by removal of water, use of acids, oil, or spices and by keeping in low temperature. The commonly utilize methods of this principle are drying, freezing, pickling, salting, and smoking. A layer of oil on the top of any food prevents growth of micro-organisms such as moulds and yeasts by preventing exposure to air. Spices like pepper and turmeric conduct little bacteriostatic effect.















Main food preservation methods
MethodEffect on microbial growth or survival
refrigeration or chilling humbled temperature to retard growth
FreezingLow temperature and reduction of water activity to prevent growth
Drying, curing and conserving lessening in water activity sufficient to delay or prevent growth
Vacuum and oxygen free modified melody packagingLow oxygen tension in disallow strict aerobes and delay growth of facultive anaerobes
Carbon dioxide enriched modified aura packagingSpecific inhibition of some micro-organisms by speed of light dioxide
Addition of acidsreducing of pH value and sometimes additional inhibition by the particular acid
Lactic fermentationReduction of pH value in situ by microbial exploit and sometimes additional inhibition by the lactic and acetic...If you involve to get a full essay, order it on our website: Orderessay



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