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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.
Directive effect in mono substituted benzene derivatives: The substituent previously present on the benzene ring directs the incoming substituent to inhabit ortho (2 or 6), met
Classification of proteins - Fibrous proteins These are composed of polypeptide chains which run parallel to the axis and are held together by a strong hydrogen and disulphide
The maximum number of electrons in p -orbital with n= s, m=1 is: (1) 6 (2) 2 (3) 14 (4) 10 Ans: 2
give an clear explanation about kohlrauschs law
Ammonia is oxidised with air to form nitric oxide in the first step to produce nitric acid. The reaction occurs in a well insulated continuous reactor based on the stoichiometry:
Amino acids Proteins are a class of biologically significant substance. They are important to virtually all processes in living systems. A few of acids are hormones that offer
separation of metal
Stephen reaction - Aldehydes and Ketones Benzaldehyde is acquired by partial reduction of phenyl cyanide along with stannous chloride and passing dry HCl gas in ether solution
principles of GCMS
advantages and dis advantages?
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