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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.
Q. Is fecundation in mammals external or internal? Fecundation in mammals is internal with copulation. In the contemporary world human technology is able to promote artificial
Calculate the Concentration of Unknown Solution from Standard Curve? i) First take different volume of standard solution (say 0.2, 0.4, 0.6, 0.8, 1.0 ml) and then calculate the
Cyanotic Heart Disease In this there is a communication between Pulmonary and systemic circulation through which venous blood enters the systemic circulatory system. The infa
Autochory - Dispersal of Seeds This mechanism of self-dispersal is based on forceful expulsion of the seed from the fruit because of desiccation or turgidity of the cells of
Define Surgical Procedures for Cancer Patient Major resection of the small bowel is not common. Resection of the ileum leads to certain physiological and nutritional problems.
How is the concept of chromosome related to the concept of the gene? A chromosome is a DNA molecule. A chromosome may have several dissimilar genes and also DNA portions tha
Whey Protein Concentrates You already know that whey is the residual liquid substance that is obtained by separating the coagulum from milk during cheese making. There are imp
three types of evidence used by systematic taxonomists
Q. What are the two major divisions of the chordate phylum? Chordates are divided into vertebrates and protochordates (urochordates and cephalochordates). Q. What are the d
what is .groups of protozoa?
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