Evaluate precentage proteins in milk, Chemistry

Assignment Help:

Q. Evaluate precentage Proteins in Milk ?

Milk comprises of casein, lactoalbumins and lactoglobulins. About 82 per cent of the protein in milk is casein and the remaining proteins are whey proteins, which are lactoalbumin and lactoglobulin. Casein binds with calcium in milk and forms the calcium-caseinate complex, which is present in the colloidal form. Acid, rennet, alcohol and heat can precipitate this complex.

The proteins in milk are determined by the Kjeldahl procedure, which is defined as the amount of nitrogen experimentally found and multiplied by an approximate conversion factor. In this procedure, as you may have already studied about in the Nutritional Biochemistry practical, the sample of milk is oxidized in the presence of sulphuric acid and nitrogenous compounds are converted into ammonium sulphate. Ammonia is liberated by adding an excess of alkali and is quantitatively distilled into a measured volume of standard hydrochloric acid or sulphuric acid. The acid not neutralized by ammonia is back-titrated with standard alkali.


Related Discussions:- Evaluate precentage proteins in milk

Electrolysis, If 8686 C of charge is passed through molten magnesium chlori...

If 8686 C of charge is passed through molten magnesium chloride, calculate the number of moles of Mg(l) produced

Reaction with dehydration of alcohol, Reaction with Dehydration of alcohol ...

Reaction with Dehydration of alcohol Reaction with H 2 SO 4 [Dehydration of alcohol]: The removal of water from a compound is termed as dehydration. The sequence of simple deh

How are formalin and trioxane related to methanol, Express the relation amo...

Express the relation among the half-life period of a reactant and its initial concentration if the reaction involved is of second order. How are formalin and trioxane related to

For the dumb-bell shaped orbital, For the dumb-bell shaped orbital, the val...

For the dumb-bell shaped orbital, the value of  l is: (1) 3        (2) 1        (3) 0        (4) 2 Ans: 1

Organic, A crucial step in the Robinson annelation is the elimation of an a...

A crucial step in the Robinson annelation is the elimation of an aldol adduct to form an enone. The elimination of an aldol product can occur in base (it occurs even more readily i

Explain about stereoisomerism, Q. Explain about Stereoisomerism? Stereo...

Q. Explain about Stereoisomerism? Stereoisomers have the same bonds but the arrangement of atoms in space is different.  Stereoisomerism can be divided into two kinds: geometri

Water were uniformly distributed on earth surface, If the water molecules i...

If the water molecules in 1g of water were uniformly distributed on earth surface , how many such water molecules would there be in 1 cm^2 of earth? Solution) No. of molecules in

Electrochemistry, Explain construction & working of calomel electrode.

Explain construction & working of calomel electrode.

Phenol , Why phenol can also be prepared from chlorobenzene(Dow''s process...

Why phenol can also be prepared from chlorobenzene(Dow''s process)

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