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Define Principle of colorimetric method-2, 4 dinitrophenylhydrazine?
Ascorbic acid is oxidized to dehydro ascorbic acid by copper (Cu++) ions. 2, 4 dinitrophenyl hydrazine reacts with the ketone group of dehydro ascorbic acid under acidic conditions to give osazone. The depth of the yellowish orange coloured osazone produced upon acidification with sulphuric acid is directly proportional to the amount of ascorbic acid present and can be measured photometrically at 540 nm wavelength.
As you carry out the procedure in the laboratory you will understand the method even better. So then let's get started and practically learn the two methods we have studied above. There are four activities in this practical.
Q. How can an organism that once underwent contact with an antigen be immunized against future infections by the same agent? This phenomenon is called as immune memory when an
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SIMPLE LIPIDS They are lipids formed of fatty acids and alcohol without any additional group. e.g. fats or true fats,wax,cutin, suberin. Simple lipids are mainly of 2 types
Amino acid sequence is also known as the primary structure of a protein/polypeptide; the series of amino acids in a protein/polypeptide controlled by the series of DNA bases.
Where in eukaryotic cells does mRNA synthesis occur? To where do these molecules migrate?
Explain Heat Preservation - Method of Food Preservation? The process of heating was used centuries before its action was understood. Food is heated up or cooked. Heat kills mi
Explain about the Incidence of defects in color vision Defects in colour vision can either be congenital or acquired. Males are more affected than females. Out of the populatio
A solid compound was found to contain 42.11% C, 51.46%O and 6.43% H by weight. The molecular weight of the compound was 341. What is the molecular formula of the compound?
feeding habit of branchiostoma?
Q. Use of Masks as personal protective equipment? Masks are to be worn when procedures that result in aerosol production are performed. Protection from these masks only affords
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