In this paper we present a synthesis method of calcium phosphate bioceramics such as hydroxiapatite, the mineral component of bones and hard tissue in mammals. Investigations carried out have confirmed obtaining of hydroxyapatite characterized by a high degree of crystallinity, purity, and a good stoichiometry.

We describe a novel hydroxyapatite spin-column method of nucleic acid extraction from natural sediments by which DNA and rRNA can be extracted separately. This very rapid method produces pure nucleic acid that can be utilized in some of the most common molecular biological procedures used in the analysis of natural microbial communities.

An efficient cyanation of styrenyl bromides by K(4)[Fe(CN)(6)] has been achieved under the catalysis of hydroxyapatite-supported copper(I) producing a variety of functionalized cinnamonitriles in high yields. The stereochemistry of the styrenyl double bond is preserved during the process providing the same stereoisomer of product.

A Rietveld method is described which extracts information on crystal structure, texture and microstructure directly from two-dimensional synchrotron diffraction images. This is advantageous over conventional texture analysis that relies on individual diffraction peaks, particularly for low-symmetry materials with many overlapping peaks and images with a poor peak-to-background ratio. The method...

Thermal Expansion Behavior of Biocompatible Hydroxyapatite-BaTiO3 Composites for Bone Substitutes S. Reddy a , A. K. Dubey b , B. Basu b , R. Guo a & A. S. Bhalla a a Department of Electrical and Computer Engineering, University of Texas at San Antonio, San Antonio, TX-78249, USA b Laboratory for Biomaterials, Department of Materials Science and Engineering, Indian Institute of Technology, Kanp...

Recent physicochemical(l,2) and immunochemical(3) studies from our laboratory have shown that human ceruloplasmin is a labile protein the properties of which are readily modified by a variety of experimental conditions. Our previous data, however, indicated that crystalline ceruloplasmin was a single protein. This is at variance with results from other laboratories which have shown that chromat...

The orientation texture of pulsed laser deposited hydroxyapatite coatings was studied by X-ray diffraction techniques. Increasing the laser energy density of the KrF excimer laser used in the deposition process from 5 to 7 J/cm(2) increases the tendency for the c-axes of the hydroxyapatite grains to be aligned perpendicular to the substrate. This preferred orientation is most pronounced when th...

Characterization of lead substitution for calcium in hydroxyapatite (CaHA) is carried out, using experimental techniques and Density Functional theoretical (DFT) analyses. Theoretical modeling is used to obtain information of the Pb chemical environment for occupancy at either Ca(I) or Ca(II) sites of CaHA. Effects of the larger ionic radius of Pb(+2) compared to Ca(+2) are apparent in embedded...

An interdigitated microwave sensor was used to detect the adsorption of cytochrome c on hydroxyapatite thick films. Changes in the microwave spectral response were indicative of the presence of adsorbed cytochrome c. The sensitivity of the system was also evaluated using different protein loadings on the e films. The results suggest that the microwave sensor can be utilized to detect protein. K...