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Explain about Bioactive materials
Bioactive materials: Certain glasses, ceramics, and glass-ceramics that contain oxides of silicon, sodium, calcium and phosphorus (SiO2 , Na2O, CaO, and P2O5 ) form a chemical bond with bone, resulting in a strong mechanical implant bone bond. These materials do bond to bone through a time-dependent, kinetic modification of the surface triggered by their implantation within living bone. An ion-exchange reaction between the bioactive implant and surrounding body fluids results in the formation of a biologically active calcium phosphate layer on the implant. This layer is chemically and crystallographically equivalent to the mineral phase in bone which is responsible for the strong interfacial bonding.
OESOPHAGU S - Gullet opens in oesophagus. First organ of alimentary canal. After piercing diaphragm, it form stomach in abdominal cavity. No digestion in it. Food mov
Two dimension gene scanning technique is a high resolution system for finding of mutational variants in multiple genes. This method is on the basis of combination of extensive poly
Pelagic Zone - Organisation of the Marine Ecosystem The waters contained in the sea basin, constitute the pelagic zone which is divided into The neritic zone situ
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Q. What are astigmatism and presbyopia? Presbyopia is the visual impairment in which there is loss of the cililary muscle strength thus reducing the ability of the crystalline
Explain Vitamin A Deficiency - Micronutrient Deficiencies? Vitamin A deficiency (VAD) is a major public health problem, and the most vulnerable are preschool children and pregn
After the pollination how does fecundation occur in angiosperms? In these plants is fecundation dependent on water? After the pollination one of the sperm nuclei from the polle
what is flora?
Hypoglycaemia Unawareness ? Some people with diabetes do not have early warning signs of low blood glucose, a condition called hypoglycemia unawareness. ? This conditio
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