Of 188 (144 renal, 29 bladder, 15 ureteric) stones analysed, 109 (58%) were pure calcium oxalate stones and in 177 (94%) calcium oxalate was the main component. The remaining were of mixed composition containing calcium phosphate, uric acid and calcium hydrogen phosphate. Serum calcium levels in 50 patients with pure calcium oxalate stones were normal. Majority of the cases (76%) came from the ...

Calcium deficient nanohydroxyapatite (nanoHap) powders were synthesized by co-precipitation of calcium α-D-heptagluconate hydrate and diammonium hydrogen phosphate solutions. TEM and HRTEM images of powders after the drying of products showed that the reactant concentration affected the sizes and morphology of particles. Small changes were found in phase composition of nanoHap powders synthesiz...

A simple and rapid method of reversed-phase ion-pair high-performance liquid chromatography (HPLC) with UV-detection on a common C(18) column in an isocratic mode with the addition of tetrabutylammonium phosphate for the separation of polyprenyl phosphate oligomerhomologues has been developed. The method was successfully applied to assay the composition of polyprenyl phosphates obtained from p...

Objectives: To assess the dietary phosphate intake of hemodialysis patients with hyperphosphatemia and effects a dietetic intervention focused on limiting load. Design: Cross-sectional assessment prospective study. Setting: Hospital units AL-Khor hospital – Hamad Medical Corporation, Qatar. Subjects: sixteen stable adult patients, who had phosphorus serum levels ≥1.6 mmol/L. Intervention: Analy...

Thermally processed hydroxyapatite coatings used on dental implants and hip prostheses for enhanced fixation may typically consist of a number of chemical and structural phases. These phases affect coating performance and tissue attachment. Hydroxyapatite was plasma sprayed to examine the phase evolution during processing. Coatings were examined with X-ray diffraction and elemental analysis. Re...

Inorganic phosphate limitation modulates capsular polysaccharide composition in mycobacteria 4. Running title: Pi limitation modulates capsular polysaccharide composition. ABSTRACT Mycobacterium tuberculosis is protected by an unusual and highly impermeable cell-envelope that is critically important for the successful colonisation of the host. The outermost surface of this cell envelope is form...

This study deals with the effect of gelatin on physical and mechanical properties of  calcium phosphate bone cements. The mixture of tetracalcium phosphate (TTCP) and dicalcium phosphate (DCPA) as the cement powder was mixed with 6 wt% Na2HPO4 solution containing different amount (0, 2, 5 and 8% in w/w) of foamed gelatin as liquid phase. The physical properties were determined in the terms of s...

An overview of the formation of calcium phosphate under in vitro environment on the surface of a range of bioactive materials (e.g. from silicate, borate, and phosphate glasses, glass-ceramics, bioceramics to metals) based on recent literature is presented in this review. The mechanism of bone-like calcium phosphate (i.e. hydroxyapatite) formation and the test protocols that are either already ...

The objective of this study was to investigate the ability of a culture highly enriched with the polyphosphate-accumulating organism, "Candidatus Accumulibacter phosphatis" clade IIC, to adjust their metabolism to different phosphate availabilities. For this purpose the biomass was cultivated in a sequencing batch reactor with acetate and exposed to different phosphate/carbon influent ratios du...

The osteoconductive and possibly osteoinductive characteristics of OCP increased the interest in preparation of bone graft materials that contain OCP in its composition. Calcium phosphate cements (CPCs) were prepared using a mixture of α-tricalcium phosphate (α-TCP) and dicalcium phosphate anhydrous (DCPA), with α-TCP / DCPA molar ratio of 1/1 and distilled water or 0.5 mol / L phosphate aqueou...