By Zahid Amjad (auth.), Dwarika N. Misra (eds.)
Hydroxyapatite is the structural prototype of the most inorganic constituent of bone and tooth and, including fluorapatite, can be one of many important minerals in advertisement phosphate ores. The adsorption features and floor chemistry of hydroxyapatite are very important in realizing the expansion, dissolution and adhesion mechanisms of bone and teeth tissues and in elucidating the standards in mineral beneficiation resembling floation and flocculation. This quantity primarily records the complaints of the symposium at the similar subject held on the American Chemical Society assembly in Kansas urban, MO, September 12-17, 1982. It incorporates a few papers that have been no longer provided on the symposium yet doesn't contain the total software. This quantity presents, on a constrained scale, a multidisciplinary evaluate of present paintings within the box of adsorptive habit and floor chemistry of hydroxyapatite and contains sure overview articles. There are papers every one on adsorption, adsorption and its results on crystal development or dissolution kinetics, results of electrochemical parameters on solubility and adsorption, and more moderen actual tools (exoemission and high-resolution NMR) of analyzing hydroxyapatite floor. there's one paper every one on constitution modelling of apatite floor in accordance with octacalcium phosphate interface and on biodegradation of sintered hydroxyapatite.
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Extra resources for Adsorption on and Surface Chemistry of Hydroxyapatite
W. Neuman, "The Chemical Dynamics of Bone Mineral," Univ. Chicago Press, Chicago, 1958. W. Holcomb and R. A. Young, Thermal decomposition of human tooth enamel, Calcif. Tissue Int. 31:189 (1980). S. Posner and F. Betts, Synthetic amorphous calcium phosphate and its relation to bone mineral structure, Accounts Chem. Res. 9:273 (1975). J. Dallemagne and C. Fabry, Structure of bone salts, Ciba Foundation Symposium on Bone Structure and Metabolism, 1955, 14-35 (1956). D. Francis and N. C. Webb, Hydroxyapatite formation from hydrated calcium monohydrogen phosphate precursor, Calcif.
54) for fluoride uptake by hydroxyapatite involves three processes: precipitation of fluorapatite; dissolution of the solid hydroxyapati te followed by precipitation of fluorapatite (recrystallization); and removal of fluoride ions by adsorption and ion exchange. (c) Model of Ramsey et al. Ramsey et al. 0, leading to the formation of CaF2 and transformation of CaF2 into fluorapatite as the pH increases. (d) Theoretical model of Nelson and Higuchi. Ne lson and Higuchi derived a mathematical model based on diffusion and chemical reactions at moving boundaries (57).
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