It has long been known that oral or intravenous administration of phosphate salts lowers the serum calcium concentration in normal animals (1, 2) and in hypercalcemic human subjects (3-5). Recently , interest has been renewed in the clinical use of phosphate therapy to control life-threatening hypercalcemia because of the relative in-effectiveness or toxicity of other modes of therapy (6, 7). I...

statement of problem: dental caries is one of the most common chronic diseases in children. the balance between demineralization and remineralization of the decayed teeth depends on the calcium and phosphate content of the tooth surface. therefore, if a product such as casein phospho peptides - amorphous calcium phosphate (cpp- acp) which can significantly increase the availability of calcium a...

Hydroxyapatite (HA), a material proven to be biocompatible within the human body, has been produced to a high level of purity. This material has been applied as a coating on Ti-6Al-4V alloy by using the air plasma spraying technique. The coat was characterizted with SEM, XRD, FTIR and Raman spectroscopy methods to consist of a mixture of calcium phosphates including HA mainly and traces of tric...

The phosphate inhibition of succinate-powered contraction in corn mitochondria can be reversed with calcium. Associated with this reversal is an accumulation of phosphate and calcium. Both ions are essential for accumulation, although strontium will partially substitute for calcium. Arsenate does not substitute for phosphate except in producing the inhibition of contraction.The antibiotics olig...

Background: Few studies have investigated on vitamin D metabolites Serum levels, and calcium homeostasis in humans receiving retinoids, despite a substantial amount of literature concerning retinoid-induced osteoporosis in animals. We prospectively measured vitamin D metabolites serum levels and calcium homeostasis and radiographic bone changes in short course treatment with oral isotreti...

We compared the effectiveness of calcium acetate as a phosphate binder with that of calcium carbonate by substituting one for the other in patients undergoing continuous ambulatory peritoneal dialysis. Twenty patients who had been receiving calcium carbonate as a phosphate binder were instead given calcium acetate, initially with two thirds of the previous dose of elemental calcium. The calcium...

The calcium phosphate composite octacalcium / calcite was obtained at pH 5–7 from the CaCO 3 /Ca(H 2 PO 4 ) aqueous suspension in a galvanostatic mode current density of 20 mA/cm for min. Drying 80 °C without precipitate maturation stage led to powder formation consisting brushite, and small amount phosphate. Prolonged air months hydrolytic transformation brushite into stabilized by calcite. us...

Earlier it has been shown that nucleic acids of high molecular weight can be be introduced into cells by coprecipitation with calcium phosphate. We have studied the requirements for calcium phosphate coprecipitation of shorter nucleotides. The degree of coprecipitation of dodecanucleotides lacking terminal phosphate varied between 25 and 72%. Tetramers with a 5'-monophosphate were coprecipitate...

Oyster shells have received attention for use as a calcium resource. For this study, calcium phosphate was prepared from phosphoric acid and oyster shells. The influences of the concentration of phosphoric acid and pH in the preparation conditions were studied from the yields of calcium phosphate and unreacted carbonate, and the Ca/P ratios in precipitates. The yield of calcium phosphate and ca...