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Aortic Allograft (Homograft) : In the earlier years fresh antibiotic preserved aortic allografts were tried. As the shelf life is limited, availability of all sizes at all times could not be guaranteed. At present cryopseservation is preferred. The valve is harvested under sterile conditions and is frozen using liquid nitrogen tissue culture medium containing 10 per cent dimethyl sulploxide (DMSO). It is stored a1 -180°C. They are durable and free from structural deterioration in 80 per cent of the patients at 15 years.
Explain how human activities can cause an imbalance in biogeochemical cycling and lead to problems such as cultural eutrophication and fish kills
a) Why do C 4 plants have dimorphic chloroplasts? Describe the different steps involved in C 4 photosynthetic carbon cycle in such plants.
Explain Phylum Cnidaria - Coelenterates? Members of the Phylum Cnidaria and one other group-Phylum Ctenophora (the comb jellies)-are the only two animal phyla that have radiall
Q. What is Echocardiography in pericardial diseases? Ans. One of the earliest clinical applications of echocardiography was in the detection of pericardial effusion and it rema
Q. Concerning permeability what type of membrane is the cell membrane? The cell membrane is a selectively permeable membrane that is it allows the passage of water and some sel
why excretory organ of prawn is called green gland?
What is Knot tying Once the suture is satisfactorily placed, it must be secured with a knot. The instrument tie is used most commonly in cutaneous surgery. The square knot is t
What is the classification that divides orders? Orders are divided into Families. The hierarchy of classification of living things most usually used is, from broadest to nar
Q Is the tubular-dorsal nervous system of chordates associated to radial or lateral symmetry? How does that explain the complexity level of the nervous system reached by the verteb
Explain the molecular difference between fats and oils. How do the differences affect their physical properties?
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