• XRD and FT-IR studies revealed that the resultant nanoparticles were produced by mineral cross-linkages of hydroxyapatite (HAp) and the crystal amount and properties such as morphology and crystallinity could be well-controlled by the reaction conditions. (elsevierpure.com)
  • After removal of the surfactants, we carried out the alternative dialysis of nanoparticles against CaCl2 aqueous solution and phosphate buffered solution for further mineral cross-linking. (elsevierpure.com)
  • This approach allowed to prepare apatite nanoparticles as a single hydroxyapatite phase when the used Tb3+ concentrations were (i) ≤ 0.005 M at all maturation times or (ii) = 0.010 M with 4 h of maturation. (bvsalud.org)
  • It is also used as a nutritional supplement and occurs naturally in cow milk,[citation needed] although the most common and economical forms for supplementation are calcium carbonate (which should be taken with food) and calcium citrate (which can be taken without food). (wikipedia.org)
  • Chemical systems of study include zinc oxide and the biominerals calcium carbonate (calcite) and calcium hydroxyl phosphate (hydroxyapatite). (winthrop.edu)
  • Barnes DH, Jugdaosingh R, Kiamil S, Best SM (2 011) Shelf Life and Chemical Stability of Calcium Phosphate Coatings Applied to Poly Carbonate Urethane Substrates. (omicsonline.org)
  • This paper examines the chemical stability of CaP coatings that were applied to a poly carbonate urethane (PCU) substrate by an aqueous, low temperature technique. (omicsonline.org)
  • Calcium sulphate (CaSO 4 ) and calcium carbonate (CaCO 3 ) are the other two popular choices of crosslinkers, however due to their lower solubility within an aqueous solution the gelation time is slower. (nature.com)
  • It is formed of calcium carbonate (CaCO₃), silica (SiO₂), calcium silicate (Ca₂SiO₄), hydroxylapatite (Ca₁₀P₆O₂₆), calcium carbonate and phosphate (Ca₁₀(PO₄) 6CO₃) and silicate calcium and magnesium (Ca₅MgSi₃O₁₂). (waset.org)
  • Contribution à l'étude des mécanismes d'entartrage: Influence de la matière humique dans l'inhibition de la croissance cristalline du carbonate de calcium, INSA Toulouse (1994). (waset.org)
  • 9] A. Kamari, F. Gharagheizi, A. Bahadori and A.H. Mohammadi, Determination of the Equilibrated Calcium Carbonate (Calcite) Scaling in Aqueous Phase Using a Reliable Approach. (waset.org)
  • Fifty percent of plasma calcium is ionized, 40% is bound to proteins (90% of which binds to albumin), and 10% circulates bound to anions (eg, phosphate, carbonate, citrate, lactate, sulfate). (medscape.com)
  • It is also known as tribasic calcium phosphate and bone phosphate of lime (BPL). (wikipedia.org)
  • Calcium phosphate is one of the main combustion products of bone (see bone ash). (wikipedia.org)
  • Hydroxyapatite-chitosan/gelatin (HA:Chi:Gel) nanocomposite scaffold has potential to serve as a template matrix to regenerate extra cellular matrix of human bone. (csircentral.net)
  • Calcium phosphate (CaP)-based biomaterials have superior properties and have been widely used for bone defect repair, due to their similarities to the inorganic components of human bones. (encyclopedia.pub)
  • Hydroxyapatite, a type of calcium phosphate that is similar to the mineral component of bone, is the most commercially popular calcium phosphate coating for biomedical implants [ 1 ]. (omicsonline.org)
  • Hydroxyapatite and other calcium phosphate coatings have been investigated extensively for clinical applications due to their ability to form a direct bond with living bone, a property often referred to as "bioactivity" [ 2 ]. (omicsonline.org)
  • 11 Calcium phosphate-coated implants have been described in the literature which demonstrate early direct bone attachment to the hydroxyapatite surface and this occursas quickly as one month post-operatively. (com.pk)
  • Bone substrates like hydroxyapatite and tricalcium phosphate have been widely used for promoting spinal fusion and reducing the complications caused by autograft. (biomedcentral.com)
  • The micro-CT result from the posterolateral fusion model showed whitlockite had slightly but significantly higher percent bone volume than tricalcium phosphate, though none of the materials formed successful fusion with surrounding bone tissue. (biomedcentral.com)
  • Whitlockite had a potential of being a better bone substrate hydroxyapatite and tricalcium phosphate in spinal fusion with low risk of inducing ectopic ossification. (biomedcentral.com)
  • Calcium is necessary for bone mineralization and is an important cofactor for hormonal secretion in endocrine organs. (medscape.com)
  • PTH stimulates osteoclastic bone reabsorption and distal tubular calcium reabsorption and mediates 1,25-dihydroxyvitamin D (1,25[OH] 2 D) intestinal calcium absorption. (medscape.com)
  • [ 5 ] Vitamin D stimulates intestinal absorption of calcium, regulates PTH release by the chief cells, and mediates PTH-stimulated bone reabsorption. (medscape.com)
  • Calcitonin lowers calcium by targeting bone, renal, and GI losses. (medscape.com)
  • Hydroxyapatite (HAP) as the most thermally stable crystalline phase of CaP is mostly used in the form of ceramics or composites scaffolds with polymers. (encyclopedia.pub)
  • A systematic evaluation of mechanical and biocompatibility properties of different volume fractions of hydroxyapatite whiskers in comparison with three commercial dental composites filled with micro- and nanosilica particles was carried out. (hindawi.com)
  • Six groups with different hydroxyapatite whiskers mass fractions were taken into account in order to be compared with the performances of silica particles based composites group. (hindawi.com)
  • With this aim, different mass fraction of hydroxyapatite based composites and three commercial composites loaded with silica particles were tested and compared in order to verify the effective enhancement in both biocompatibility and mechanical properties. (hindawi.com)
  • Composites with varied proportions of beta-Ca-3(PO4)(2) and ZnO were obtained through an in situ aqueous precipitation method under slightly basic (pH approximate to 8) conditions. (ua.pt)
  • Hydroxyapatite-PMMA composites. (dokumen.pub)
  • Hydroxyapatite-PS composites. (dokumen.pub)
  • Calcium phosphate refers to numerous materials consisting of calcium ions (Ca2+) together with orthophosphates (PO3− 4), metaphosphates or pyrophosphates (P 2O4− 7) and occasionally oxide and hydroxide ions. (wikipedia.org)
  • Tricalcium phosphate (sometimes abbreviated TCP), more commonly known as Calcium phosphate, is a calcium salt of phosphoric acid with the chemical formula Ca3(PO4)2. (wikipedia.org)
  • Most commercial samples of "tricalcium phosphate" are in fact hydroxyapatite. (wikipedia.org)
  • Much of the "tricalcium phosphate" on the market is actually powdered hydroxyapatite. (wikipedia.org)
  • Tricalcium phosphate is produced commercially by treating hydroxyapatite with phosphoric acid and slaked lime. (wikipedia.org)
  • The precipitate will either be "amorphous tricalcium phosphate", ATCP, or calcium deficient hydroxyapatite, CDHA, Ca9(HPO4)(PO4)5(OH), (note CDHA is sometimes termed apatitic calcium triphosphate). (wikipedia.org)
  • Crystalline tricalcium phosphate can be obtained by calcining the precipitate. (wikipedia.org)
  • β-Tricalcium phosphate has a crystallographic density of 3.066 g cm−3 while the high temperature forms are less dense, α-tricalcium phosphate has a density of 2.866 g cm−3 and α′-tricalcium phosphate has a density of 2.702 g cm−3 All forms have complex structures consisting of tetrahedral phosphate centers linked through oxygen to the calcium ions. (wikipedia.org)
  • Tricalcium phosphate occurs naturally in several forms, including: as a rock in Morocco, Israel, Philippines, Egypt, and Kola (Russia) and in smaller quantities in some other countries. (wikipedia.org)
  • Biphasic calcium phosphate, BCP, was originally reported as tricalcium phosphate, but X-Ray diffraction techniques showed that the material was an intimate mixture of two phases, hydroxyapatite (HA) and β-tricalcium phosphate. (wikipedia.org)
  • Tricalcium phosphate is used in powdered spices as an anticaking agent, e.g. to prevent table salt from caking. (wikipedia.org)
  • In this study, we compared the osteoinductivity of whitlockite, hydroxyapatite, and tricalcium phosphate porous particles with SD rat spine posterolateral fusion model and investigated whether whitlockite could induce ectopic ossification with SD rat abdominal pouch model. (biomedcentral.com)
  • 2 The phosphate rock is converted to phosphoric acid (H 3 PO 4 ) which is used to produce phosphate fertilizers. (rsc.org)
  • In the wet phosphoric acid process, the phosphate rock is reacted with sulfuric acid (H 2 SO 4 ), producing gypsum (CaSO 4 ·2H 2 O) and aqueous phosphoric acid (reaction (1) ). (rsc.org)
  • The high temperature forms each have two types of columns, one containing only calcium ions and the other both calcium and phosphate. (wikipedia.org)
  • Literature data on equilibria between solid calcium phosphates having the apatite structure and aqueous solutions containing Na + and CO 3 2- ions were reexamined in view of the present data about the complexation of ions in such systems. (degruyter.com)
  • Additionally, xylitol is associated with calcium in aqueous solution, to inhibit the dissolution of calcium and/or phosphate ions from enamel and to act as a carrier of the calcium required for enamel remineralisation. (hismileteeth.com)
  • Despite numerous studies on the dissolution properties of calcium phosphate (CaP) coatings, the coating "shelf life" (i.e. the chemical stability of these coatings prior to implantation), has not been investigated adequately, particularly for CaP coatings applied to polymeric substrates. (omicsonline.org)
  • Calcium phosphate (CaP) coatings are applied to the surface of a range of orthopaedic implants to enhance the interfacial bonding between the implant and host tissue. (omicsonline.org)
  • Numerous prior studies have investigated the dissolution of CaP coatings, such as hydroxyapatite, in conditions designed to simulate physiological conditions, i.e. typically at pH 7.4 and at ~37 °C [ 3 - 7 ]. (omicsonline.org)
  • This paper discusses the processes of grit-blasting, plasma spraying, acid-etching, anodization and implant surface coatings with hydroxyapatite. (com.pk)
  • Ahmed F, Rashid H, Farookhi S, Verma V, Mulyar Y, Khalifa M, Sheikh Z. Surface modifications of endosseous dental implants by incorporation of roughness and hydroxyapatite coatings. (com.pk)
  • Hydroxyapatite (HAp) coatings with and without octacalcium phosphate (OCP) were uniformly formed on pure magnesium by a hydrothermal treatment using a Ca-EDTA solution. (elsevierpure.com)
  • It was demonstrated that the crystal phase and microstructure of the calcium phosphate-coatings can vary with the pH of the treatment solution. (elsevierpure.com)
  • It is revealed that the degree of protection afforded by calcium phosphate-coatings varies with their crystal phase and microstructure. (elsevierpure.com)
  • Title: Budget-impact model for colonoscopy cost calculation and comparison between 2 litre PEG+ASC and sodium picosulphate with magnesium citrate or sodium phosphate oral bowel cleansing agents. (aablocks.com)
  • The developed process achieves around 70% phosphorus recovery as an industrial-grade (19 wt% P) dicalcium phosphate dihydrate product with minimal iron, magnesium, and aluminum contamination, while also producing value-added calcium sulfate dihydrate (gypsum) and iron/magnesium byproducts. (rsc.org)
  • Calcium levels are also affected by magnesium and phosphorus. (medscape.com)
  • An example is: Ca10−δ(PO4)6−δ(HPO4)δ(OH)2−δ → (1−δ) Ca10(PO4)6(OH)2 + 3δ Ca3(PO4)2 β-TCP can contain impurities, for example calcium pyrophosphate, CaP2O7 and apatite. (wikipedia.org)
  • Recalculations showed that all solutions were undersaturated or just saturated with respect to either brushite or octocalciumphosphate or more or less finely dispersed calcite and supersaturated with respect to pure hydroxylapatite. (degruyter.com)
  • Many modern orthopaedic implants are coated with calcium phosphate to improve the host tissue response to the implants. (omicsonline.org)
  • The conversion of bioactive glass to a calcium phosphate material, typically hydroxyapatite (HA), by solution-precipitation reactions in aqueous phosphate solution, has been commonly reported. (mst.edu)
  • For IC, the dentin layer was removed, leaving the enamel that was crushed, and autoclaved for chemical quantification (calcium, fluorine, and phosphorus). (thejcdp.com)
  • Phosphorus does not exist in elemental form in the natural environment because elemental P is extremely reactive and readily combines with oxygen (O) to form phosphate (PO 4 ). (ufl.edu)
  • ICP-OES was used to measure the calcium and phosphorus concentrations of the immersion solution. (omicsonline.org)
  • Phosphorus supplements are usually produced from high-grade phosphate rock concentrates (28-40 wt% P 2 O 5 ). (rsc.org)
  • The main role of phosphate supplements is to deliver soluble and bioavailable phosphorus to plants and livestock as crop fertilizers or animal feed additives. (rsc.org)
  • The analysis of the scale reveals that it is rich in calcium and phosphorus. (waset.org)
  • In this study, we develop an integrated process for the direct recovery and separation of dicalcium phosphate dihydrate for fertilizer and livestock feed additive production from a low-grade (2.0 wt% P) iron-rich (19.7 wt% Fe) phosphate ore. (rsc.org)
  • 40% P 2 O 5 ), while livestock feed additives are usually in the form of dicalcium phosphate (CaHPO 4 ), monocalcium phosphate (Ca(H 2 PO 4 ) 2 ), or defluorinated phosphate (Ca 3 (PO 4 ) 2 ). (rsc.org)
  • Hydroxyapatite (HAP, Ca 10 (PO 4 ) 6 (OH) 2 ) has a hexagonal prismatic structure that exposes two crystalline surfaces: prism-faceted a- and basal-faceted c-surfaces. (osti.gov)
  • article{osti_1543698, title = {Effects of Controlled Crystalline Surface of Hydroxyapatite on Methane Oxidation Reactions}, author = {Oh, Su Cheun and Xu, Jiayi and Tran, Dat T. and Liu, Bin and Liu, Dongxia}, abstractNote = {Hydroxyapatite (HAP, Ca10(PO4)6(OH)2) has a hexagonal prismatic structure that exposes two crystalline surfaces: prism-faceted a- and basal-faceted c-surfaces. (osti.gov)
  • it is hydroxyapatite if the extra ion is mainly hydroxide. (wikipedia.org)
  • Data obtained show better interfacial interaction with filler/matrix until 20 wt% of hydroxyapatite whiskers partially replaced silica particles filler. (hindawi.com)
  • For this reason, in the recent five years hydroxyapatite particles and whiskers have been added as novel bioactive and biocompatible reinforcing filler in dental restorations. (hindawi.com)
  • This information is of primary interest in order to achieve a final consistency and specific formulation of hydroxyapatite whiskers mixed with silica particles filler in resin composite. (hindawi.com)
  • In particular, six different ratios of hydroxyapatite/silica particles were investigated. (hindawi.com)
  • This early-stage formation of brushite has not been reported in previous studies of converting bioactive silicate and borate glasses in aqueous phosphate solution. (mst.edu)
  • Variation in the composition of calcium silicate-based pulp capping materials could influence the discoloration potential of some of these materials, thus affecting the color and aesthetic appearance of the coronal tooth structure. (biomedcentral.com)
  • Therefore the aim of this study was to evaluate in vitro the color change of coronal tooth structure after placing various calcium silicate-based materials in the pulp chamber in the presence or absence of blood. (biomedcentral.com)
  • Title: Citrate, not phosphate, can dissolve calcium oxalate monohydrate crystals and detach these crystals from renal tubular cells. (aablocks.com)
  • She continues a hydrothermal program at Winthrop, the main objective on the relationships between aqueous chemistry and crystal shape. (winthrop.edu)
  • In addition, biocompatibility test showed less cytotoxic effect with the addition of 20 wt% of hydroxyapatite in comparison with higher rates. (hindawi.com)
  • To overcome the present lack in the literature about hydroxyapatite based composite, we proposed a systematic analysis of the mechanical and biocompatibility performances of them in comparison with commercial dental composite. (hindawi.com)
  • The aim of this study was to investigate the microstructure, microhardness and biocompatibility properties of nano hydroxyapatite (HA) doped with a constant yttrium (Y3+) and varying fluoride (F-) compositions. (metu.edu.tr)
  • The current study focused on doping of hydroxyapatite (HA) with constant yttrium (Y3+) and varying fluoride (F-) compositions to investigate its microstructure, microhardness, and biocompatibility. (metu.edu.tr)
  • First, phase pure hydroxyapatite-chitosan nanocrystals were in situ synthesized by coprecipitation method using a solution of 2% acetic acid dissolved chitosan and aqueous solution of calcium nitrate tetrahydrate Ca(NO3)(2),4H(2)O] and diammonium hydrogen phosphate (NH4)(2)H PO4]. (csircentral.net)
  • In this research, Zeolitic Imidazolate Framework 8 (ZIF-8), a zinc-based MOF, was selected together with cellulose, an almost inexhaustible polymeric raw material produced by nature, to prepare cellulose/ZIF-8 composite flat sheets via an in-situ growing single-step method in aqueous media. (bvsalud.org)
  • and the liquid consists of calcium chloride which is a setting accelerator and water-reducing agent in aqueous solution [ 12 ]. (biomedcentral.com)
  • Title: Calcium chloride and sodium phosphate in neonatal parenteral nutrition containing TrophAmine: precipitation studies and aluminum content. (aablocks.com)
  • At present the most frequent choice of ionic crosslinker is Calcium Chloride (CaCl 2 ) as it typically leads to rapid gelation due to its high solubility in aqueous solutions 21 . (nature.com)
  • The results of the physicochemical analysis of the waters show that they are full of bicarbonates (653 mg/L), chloride (478 mg/L), nitrate (412 mg/L), sodium (425 mg/L) and calcium (199mg/L). Their pH is slightly alkaline. (waset.org)
  • Scaffolds with varying composition of hydroxyapatite, chitosan, and gelatin were prepared using lyophilization technique where glutaraldehyde (GTA) acted as a cross-linking agent for biopolymers. (csircentral.net)
  • Conclusion: Calcium hydroxylapatite is a very effective agent for many areas of facial soft tissue augmentation and is associated with a high and well-established safety profile. (jcadonline.com)
  • It cannot be precipitated directly from aqueous solution. (wikipedia.org)
  • This paper describes the structural and compositional characteristics of the calcium phosphate material formed during the early-stage conversion (o5 h) of a borosilicate glass (designated H12) in aqueous phosphate solution. (mst.edu)
  • Early Stages of Calcium Phosphate Formation on Bioactive Borosilicate Glass in Aqueous Phosphate Solution," Journal of the American Ceramic Society , John Wiley & Sons, May 2008. (mst.edu)
  • aqueous solution and phosphate buffered solution for further mineral cross-linking. (elsevierpure.com)
  • Typically double decomposition reactions are employed, involving a soluble phosphate and calcium salts, e.g. (wikipedia.org)
  • The process combines leaching using dilute sulfuric acid (0.29 M) and selective precipitation using calcium oxide. (rsc.org)
  • Nanocrystalline and nanostructured TiO2-Cr2O3 thin films and powders were prepared by a facile and straightforward aqueous particulate sol-gel route at low temperature of 400°C. The prepared sols showed a narrow particle size distribution with hydrodynamic diameter in the range of 17.7 nm to 19.0 nm. (sharif.edu)
  • Some physicochemical characteristics influence the erosivity of food like the type of acid, pH, titratable acidity, chelating potential, calcium and phosphate concentration, temperature and adhesion 4 . (bvsalud.org)
  • In addition, hydroxyapatite whiskers (wHA) have been considered the best option as reinforcing filler in comparison with other whiskers based on carbon, ceramic, glass, metal, and polymer due to the absence of cytotoxicity effects [ 12 , 13 ]. (hindawi.com)
  • 10 https://en.wikipedia.org/wiki/Ceramic (accessed in March 2018). (ceramic-science.com)
  • Chemical Properties of Calcium Phosphate" Encyclopedia , https://encyclopedia.pub/entry/31249 (accessed December 02, 2023). (encyclopedia.pub)
  • Objectives: To mark the milestone of 10 years of use in the aesthetic field, this review will consider the evolution of calcium hydroxylapatite in aesthetic medicine, provide a detailed injection protocol for a global facial approach, and examine how the unique properties of calcium hydroxylapatite provide it with an important place in today's market. (jcadonline.com)
  • Synthesis of Hybrid Polyphenol/Hydroxyapatite Nanomaterials with Anti-Radical Properties. (upmc.fr)
  • Hydroxyapatite: Structure and properties. (dokumen.pub)
  • affects the ability of certain strains to adhere to the hydroxyapatite surface and decreases caries and plaque formation. (hismileteeth.com)
  • Effects of bleaching agents containing fluoride and calcium on human enamel. (thejcdp.com)
  • As the main biomineral component in enamel and dentine, hydroxyapatite is responsible for their higher mechanical performances. (hindawi.com)
  • Calcium phosphate is also commonly derived from inorganic sources such as mineral rock. (wikipedia.org)
  • We developed a mineral cross-linking strategy to prepare a biopolymer-based nanoparticle using calcium phosphate (CaP) as a cross-linker. (elsevierpure.com)
  • 1,4-6 The P 2 O 5 grade, mineral form, and calcium content of these products are critical for their effective performance in their target applications and their market value. (rsc.org)
  • Inorganic Phosphate is contributed by detergents and household cleaning products such as soaps. (ufl.edu)
  • Acute acidemia decreases calcium binding to albumin, whereas alkalemia increases binding, which decreases ionized calcium. (medscape.com)
  • Clinical signs and symptoms are observed only with decreases in ionized calcium concentration (normally 4.5-5.5 mg/dL). (medscape.com)
  • Méthodologie expérimentale : plans statistiques d'expérience, en particulier dans le domaine des biomatériaux (planification d'expériences in vitro et in vivo). (epfl.ch)
  • Calcium hydroxylapatite combines high elasticity and viscosity with an ability to induce long-term collagen formation making it an ideal agent for a global facial approach. (jcadonline.com)
  • In fact, it was shown that the incorporation of hydroxyapatite with whiskers morphology can provide larger load transfer and favor toughening mechanisms, thus, increasing flexural modulus and fracture toughness of resins in comparison with conventional silica based fillers [ 6 - 11 ]. (hindawi.com)
  • Background: Calcium hydroxylapatite is one of the most well-studied dermal fillers worldwide and has been extensively used for the correction of moderate-to-severe facial lines and folds and to replenish lost volume. (jcadonline.com)
  • In wastewater, P exists as one of several possible phosphate compounds including orthophosphate, polyphosphates, and organic phosphate (Crites and Tchobanoglous 1998). (ufl.edu)
  • 2. Organic Phosphate is contributed by human excreta (feces) and food residues. (ufl.edu)
  • Organic phosphates are present in sugars, phospholipids, and nucleotides. (ufl.edu)
  • A two-phase aqueous-organic system was used to degrade benzene, toluene and phenol, individually and as mixture by Pseudomonas putida F1 (ATCC 700007). (metu.edu.tr)
  • Title: Comparison of patient acceptance of sodium phosphate versus polyethylene glycol plus sodium picosulfate for colon cleansing in Japanese. (aablocks.com)
  • Early Stages of Calcium Phosphate Formation on Bioactive Borosilicate " by Yadong Li, B. Sonny Bal et al. (mst.edu)
  • After this threshold, the mechanical performances decrease dramatically due to both the hydroxyapatite agglomerates formation and the low degree of resin conversion. (hindawi.com)