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

Properties of styrene - hydrocarbon, Properties of Styrene Styrene is a...

Properties of Styrene Styrene is a colourless liquid, boiling point 145°C. On keeping, it slowly changes into a solid polymer known as meta styrene. The polymerisation is fast

Phenols, An example for trihydric phenols

An example for trihydric phenols

Soaps - oils and fats, Soaps - Oils and fats Soaps are the metallic sal...

Soaps - Oils and fats Soaps are the metallic salts of higher fatty acids like stearic, palmitic, oleic, etc. The potassium and sodium salts are the common soaps that are solubl

Volumetric method for acids and bases - chemical methods, Volumetric method...

Volumetric method for acids and bases - chemical methods Molecular mass of an acid can be ascertained by dissolving a known mass of the acid in water and titrating the solution

Cu2+ will have the following electronic configuration, Cu 2+ will have the...

Cu 2+ will have the following electronic configuration: (1) 1s 2 , 2s 2 , 2p 6 , 3s 2 , 3p 6 , 3d 10 , (2) 1s 2 , 2s 2 , 2p 6 , 3s 2 , 3p 9 , 4s 1     (3) 1s 2 , 2s 2 ,

Number of electrons in -conh2 is, Number of electrons in -CONH 2   is: ...

Number of electrons in -CONH 2   is: (1) 22        (2) 24      (3) 20   (4)28 Ans:24

Six protons are found in the nucleus of, Six protons are found in the nucle...

Six protons are found in the nucleus of : (1) Boron              (2) Lithium     (3) Carbon  (4 )Helium Ans: Carbon

What do you mean by acid value and free fatty acids, Q. What do you mean by...

Q. What do you mean by Acid Value and Free Fatty Acids? Acid value is a measure of hydrolytic rancidity present in the sample of oil/fat. It reflects the state of freshness o

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