Chemistry

New PDF release: Adsorption on and Surface Chemistry of Hydroxyapatite

By Zahid Amjad (auth.), Dwarika N. Misra (eds.)

ISBN-10: 1475790120

ISBN-13: 9781475790122

ISBN-10: 1475790147

ISBN-13: 9781475790146

Hydroxyapatite is the structural prototype of the most inorganic constituent of bone and enamel and, including fluorapatite, is additionally one of many imperative minerals in advertisement phosphate ores. The adsorption features and floor chemistry of hydroxyapatite are very important in figuring out the expansion, dissolution and adhesion mechanisms of bone and the teeth tissues and in elucidating the criteria in mineral beneficiation corresponding to floation and flocculation. This quantity basically records the lawsuits 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 complete software. This quantity offers, on a restricted scale, a multidisciplinary review of present paintings within the box of adsorptive habit and floor chemistry of hydroxyapatite and comprises sure evaluation articles. There are papers each one on adsorption, adsorption and its results on crystal progress or dissolution kinetics, results of electrochemical parameters on solubility and adsorption, and more moderen actual tools (exoemission and high-resolution NMR) of interpreting hydroxyapatite floor. there's one paper each one on constitution modelling of apatite floor in line with octacalcium phosphate interface and on biodegradation of sintered hydroxyapatite.

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Omnell, Crystal growth in rat enamel, J. Cell Biol. 18:109 (1963). J. Rohling, J. Althoff, R. H. Barckhaus, E. -R. Krefting, G. Lissner and P. Quint (1981) "Early stages of crystal nucleation in hard tissue formation," International Cell Biology 1980-81, Ed. H. G. Schweiger, Berlin: Springer. S. Chickerur, M. s. Tung and W. E. Brown, A mechanism for incorporation of carbonate into apatite, Calcif. Tissue Int. 32:55 (1980). ~Brown, M. S. Tung and L. C. Chow, Role of octacalcium phosphate in the incorporation of impurities into apatites, International Congress on Phosphorus Compounds, Boston, 59-71 (1980).

W. FUERSTENAU c. Bell, A. M. Posner and J. P. Quirk, J. Colloid Interface Sci. 42:250(1973). R. K. Mishra, S. W. Fuerstenau, Colloids and Surfaces 1:105(1980). S. K. Mishra, Int. J. Mineral Processing, 5:69 (1978). C. C. D thesis, University of California, Berkeley, 1976. P. Somasundaran, J. Colloid Interface Sci. 27:659(1968). J. Lin, S. Raghavan, and D. W. Fuerstenau, Colloids and Surfaces, 3:357 (1981). H. G. McCann, J. Biol. Chemistry 201:247(1953). S. A. Leach, Brit. Dental J. 106:133(1959).

For DAC concentrations up to 4 mM, increasing DAC resulted in a decrease of dissolution although the decrease was far from linear. No significant change could be seen beyond this concentration. 5, 5 and 6 mM DAC were not distinguishable. Further increase of DAC in the medium was impossible due to the low solubility of DAC in the buffer solution. The initial dissolution rate, J, was estimated from the linear region. Figure 3 is a plot of J as a function of DAC in the medium. It is interesting to note that the drop of dissolution rate with increasing DAC is not linear.

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Adsorption on and Surface Chemistry of Hydroxyapatite by Zahid Amjad (auth.), Dwarika N. Misra (eds.)


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