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Biological calcium phosphate

Driessens, F.C.M., van Dijk, J.W.E. and Borrgreven, J.M.P.M. 1978 Biological calcium phosphates and their role in the physiology ofbone and dental tissues. 1. Composition and solubility of calcium phosphates. Calcified Tissue Research 26 127-137. [Pg.112]

The selectivity is severely impeded if phosphate-based buffers are employed, since calcium-phosphate complexation occurs. In principle, the selectivity of a membrane-based ISE is constant, but contamination and degradation of the membrane s polymer component means that the selectivity decreases with usage. Contamination with biological samples can also be problematic. [Pg.69]

Phosphorite A hydrogenous mineral that forms in surficial sediments underlying surface waters of high biological productivity. It is composed primarily of calcium phosphate that is biogenic in origin. [Pg.884]

Banes, E. D. In Calcium Phosphates in Biological and Industrial Systems, Amjad, Z., Ed. 1998, Kluwer Academic Publ., Boston, 21. [Pg.313]

Phosphorus is one of the inorganic macronutrients in all known forms of life. Inorganic phosphorus in the form of phosphate (PO/ ) plays a major role in vital biological molecules, such as DNA and RNA. Living cells also utilize phosphate to transport cellular energy via adenosine triphosphate (ATP). Phospholipids are the main structural components of all cellular membranes. Calcium phosphate salts are... [Pg.53]

J. P. Yesinowski, Nuclear magnetic resonance spectroscopy of calcium phosphates, in Z. Amjad (Ed.), Calcium Phosphates in Biological and Industrial Systems, Kluwer Academic Publishers, Norwell, MA, 1998, pp. 103-143. [Pg.323]

P. Venkateswarlu, L. Singer, W.D. Armstrong, Determination of ionic (plus ionizable) fluoride in biological fluids. Procedure based on adsorption of fluoride ion on calcium phosphate. Anal. Biochem. 42 (1971) 350-359. [Pg.542]

Unlike hard biological materials that are composed primarily of one compound (calcium phosphate) and perform a limited number of functions (primarily structural). [Pg.125]

The biologically most relevant calcium phosphates are dahllite [carbonate hydroxyapatite, (Na,Ca)10(PO4,CO3)6(OH)2] francolite [carbonate fluoroapatite] hydroxyapatite [Ca10(PO4)6(OH)2]... [Pg.60]

Liquid membranes of the water-in-oil emulsion type have been extensively investigated for their applications in separation and purification procedures [6.38]. They could also allow extraction of toxic species from biological fluids and regeneration of dialysates or ultrafiltrates, as required for artificial kidneys. The substrates would diffuse through the liquid membrane and be trapped in the dispersed aqueous phase of the emulsion. Thus, the selective elimination of phosphate ions in the presence of chloride was achieved using a bis-quaternary ammonium carrier dissolved in the membrane phase of an emulsion whose internal aqueous phase contained calcium chloride leading to phosphate-chloride exchange and internal precipitation of calcium phosphate [6.1]. [Pg.74]

These data may imply that cellular mechanisms for calcium transfer and homeostasis are intimately tied up with mitochondria and that biomineralization is an essential element in Ca2+-regulation processes481,482). For a review on the role of mitochondria in the deposition of amorphous calcium phosphate in the early steps of biological calcification, see473,474. ... [Pg.75]

Kato H, Shibano M, Saito T, et al. 1994. Relationship between hemolytic activity and adsorption capacity of aluminum hydroxide and calcium phosphate as immunological adjuvants for biologicals. Microbiol Immunol 38 543-548. [Pg.327]

Another interesting approach is to use nanofiber scaffolds as a crystallization matrix to mimic biological composites. Xia and coworkers were able to produce meshes with a gradient of calcium phosphate content to mimic the tendon-to-bone insertion site [206], The variation in composition led to an interesting spatial gradient in stiffness of the scaffold. This was also reflected in an activity gradient of seeded mouse preosteoblast cells. [Pg.186]


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See also in sourсe #XX -- [ Pg.416 ]

See also in sourсe #XX -- [ Pg.411 , Pg.416 ]




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