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Carpentier -Edwards Valve (C-E) : This is porcine aortic valve preserved in gluteraldehyde and mounted on flexible stent made of cobalt-chromium-nickel alloy (ELGILOY). Gluteraldehyde, a chemical used for tanning of leather causes stability to valve leaflets due to cross linkage of collagen fibres and it reduces antigenicity. It has sewing ring with polytetra fluoro ethylene (PTFEGoretex), incorporating silicon rubber. Valves are available for aortic and mitral position in various sizes. Biological deterioration will occur after 7- 10 years but mechanical failure is uncommon. The rate of biological deterioration 'is faster in children.
Explain the Recommended Dietary Allowance for nicotinic acid? There are various factors and which niacin requirements depend. These are energy Utilization, body size and dietar
Changes in the conformation of molecules - Qualitative Changes You may recall that linear chain of amino acids of a protein folds into a characteristic structure. Acidic resid
how is the problem of chromosome shortening addressed in eukaryotic organisms and how aging might be related to the problem
Why are vaccines made of the own disease agent or of fragments of it? The goal of vaccines is to artificially persuade a specific primary immune response (and the consequent fo
Q. Can you explain Cholera? Cholera is one of the diseases which had caused epidemics all over the world. The organism which causes the disease is Vibrio cholerae. It is an
Determine about the The Halstead Category Test This test is a concept identification procedure in which the subject must discover the method or principle that governs various
what is biology
Define Thermal Coagulation and Film Formation? 1. Thermal Coagulation and Film Formation: Concentrated soy proteins can be thermally coagulated on a flat metallic surface, such
Define Procedure for Testing the Presence of Starch in Milk 1. Take 1 ml of milk sample in a test tube. 2. Add few drops of iodine solution. (2.5 gm of iodine is dissolved i
extensive note on the excretory system of amphibian
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