Explain preservation by preservatives, Chemistry

Assignment Help:

Q. Explain Preservation by Preservatives?

Preservatives, as you may already know, belong to a class of food additives that extend shelf life by inhibiting microbial growth, or by minimizing the destructive effects of oxygen, metals, and other factors that may lead to rancidity. Common preservatives include nitrites (used extensively in processed meats), sodium benzoate (often added to soft drinks), sorbic acid (dairy products), calcium and sodium propionates and sorbates (mould inhibitors used in baked goods) and common table salt.

The preservatives generally used in fruit and vegetable products may be broadly classified as class I and class II preservatives.

The class I preservatives are the natural preservatives which are not restricted in any food. Examples of class I preservatives are common salt, sugar, dextrose/glucose syrup, spices, vinegar or acetic acid and honey.

Class II preservatives are the chemical preservatives, which prevent or delay the growth of microorganisms. However, the use of chemical preservatives is limited in foodstuffs.


Related Discussions:- Explain preservation by preservatives

Why iodide ion is a good nucleophiles, Iodide ion is a good nucleophiles ...

Iodide ion is a good nucleophiles Because iodide ion is a good nucleophiles and the trimethyloxonium ion is an good alkylating agent, alkylation of  the iodide ion occu

Physical properties of tri-halides, Physical properties of Tri-halides ...

Physical properties of Tri-halides (i) Tri-halides is a sweet smelling colourless liquid. (ii) Tri-halides is heavy liquid. The density of it is 1.485. It boils at 61°C.

Explain the major modes of food deterioration, Major modes of food deterior...

Major modes of food deterioration During storage and distribution, foods are exposed to a wide range of environmental conditions. Environmental factors such as temperature, hum

Maximum number of electrons present in n, Maximum number of electrons prese...

Maximum number of electrons present in N  shell is: (1) 18              (2) 32        (3) 2              (4) 8 Ans: 32

Extraction of metals, metals iron, aluminium, copper, gold, etc. have great...

metals iron, aluminium, copper, gold, etc. have great industrial significants. which are their important ores? important alloys of iron, aluminium and copper and their uses.

Metallic acetates - acetic acid, Metallic Acetates - Acetic Acid For ma...

Metallic Acetates - Acetic Acid For making several useful metallic acetates, illustrated as: (1) Basic copper acetate that is used for making green paints. (2) Al, Fe and

Detergent, What types of detergent remove oils and fats

What types of detergent remove oils and fats

Describe processes are endothermic or exothermic, From personal experience,...

From personal experience, describe whether these processes are endothermic or exothermic. Give a reason for each.       a . A charcoal briquette burns.       b . Ice me

Tests of chloroform, Tests of chloroform (a) It gives isocyanide test (...

Tests of chloroform (a) It gives isocyanide test (Carbylamine test). (b) It makes silver mirror with Tollen's reagent. (c) Pure Chloroform does not give white precipitate

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd