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Explain chemical bonds in basic chemistry?
Chemical Bonds : Chemical bonds are forces that join atoms together in a functional unit. There are three types of bonds that can occur between atoms: ionic bonds, covalent bonds, and hydrogen bonds. Ionic bonds hold atoms together in crystals. Ionic bonds are formed when a positively charged atom, usually a metal, completes its outer shell by borrowing elecron(s) from a negatively charged nonmetal. Covalent bonds form when atoms share electrons to form the molecules that compose compounds, substances with different physical and chemical properties than the component atoms. For instance, hydrogen gas and oxygen gas join to form water, a liquid. Hydrogen bonds tend to make water and certain other compounds more cohesive and adhesive. Van der Waals forces and hydrophobic interactions are weak nonpolar associations important in living cells.
Stentless Devices : A bioprosthesis mounted on a stent reduces the effective orifice area (EOA). The newer version (third generation) stentless gluteraldehyde preserved porcine v
ASSISTING IN PROCEDURE OF BIOPSY Biopsies are removal of a small piece of tissue for examination under microscope. Such examinations are called hist to pathological examina
Define Discovery of other Essential Nutrients? Following the identification of the food factors involved in beriberi, pellagra and scurvy, the search was on for other water-sol
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In 1809, Maggiolo described a process of fabricating and inserting gold roots into freshly extracted sockets. The implant was constructed from the three pieces of gold which were s
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Explain Principle of Fehling's Soxhlet method (Lane-Eynon method)? Reducing sugars are those which have free sugar groups and hence may be estimated directly by titrating the s
What is an example of a lab experiment that shows the variation of the photosynthesis efficiency in relation to different photic energy frequencies to which the reaction is exposed
what is the function of dna primer
State the Classification of nervous system Neurological disorders can be categorised according to the primary location affected, the primary type of dysfunction involved, or th
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