• Calcium phosphate nanoparticles were produced in a range of calcium-to-phosphorus ratio, (1.20-2.19) in order to analyze the morphology and crystallinity changes, and to test the bioactivity of particles. (metu.edu.tr)
  • The findings suggest that calcium phosphate nanoparticles produced in this work have a potential to be used as biomaterials in biomedical applications. (metu.edu.tr)
  • Ebrahim Fathabadi H., M. Ghorbani, H. Mokarami Ghartavol, 'Synthesis of multilayered pH-responsive nanocapsules by using tolyltriazole as corrosion inhibitor and ZrO2 nanoparticles as core ', Nano-Structures & Nano-Objects, 26 (2021): 100760. (sharif.edu)
  • 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)
  • Development of biologically inspired experimental processes for the synthesis of nanoparticles is evolving into an important branch of nanotechnology. (teamb31-stetten.de)
  • Her doctoral work was the synthesis and characterization of air-sensitive sulfide compounds, and her postdoctoral work in the Ceramic Engineering Department at Rutgers University focused on hydrothermal synthesis of ferroelectric materials. (winthrop.edu)
  • The characterization results confirmed that nanometer-sized, spherical calcium phosphate particles were produced. (metu.edu.tr)
  • It is believed that ACP hydrolyzes under physiological temperatures and pH to form octacalcium phosphate as an intermediate, and then surface apatite. (wikipedia.org)
  • In aqueous media, ACP is easily transformed into crystalline phases such as octacalcium phosphate and apatite due to the growing of microcrystallites. (wikipedia.org)
  • 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)
  • ACP is generally categorized into either "amorphous tricalcium phosphate" (ATCP) or calcium-deficient hydroxyapatite (CDHA). (wikipedia.org)
  • It has been demonstrated that ACP has better osteoconductivity and biodegradability than tricalcium phosphate and hydroxyapatite in vivo. (wikipedia.org)
  • Bone substrates like hydroxyapatite and tricalcium phosphate have been widely used for promoting spinal fusion and reducing the complications caused by autograft. (biomedcentral.com)
  • 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)
  • 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)
  • 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)
  • 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)
  • 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)
  • The present study evaluates the synthesis of biocompatible osteoconductive and osteoinductive nano calcium phosphate (CaP) particles by industrially applied, aerosol-derived flame spray pyrolysis method for biomedical field. (metu.edu.tr)
  • XRD patterns, HRTEM, SAED, and SEM analyses revealed the amorphous nature of the asprepared nano calcium phosphate particles at low Ca/P ratios. (metu.edu.tr)
  • 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)
  • Synthesis of Fibrin-Type I Collagen Biomaterials via an Acidic Gel. (upmc.fr)
  • At Wagner, she taught physical and general chemistry, developed a variety of courses including the nonscience majors' Color Science , served as department chair and first-year program director and developed an undergraduate research program in hydrothermal synthesis. (winthrop.edu)
  • 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)
  • Recently, hydroxyapatite/collagen composites have received much attention in the field of tissue reconstruction, because human bone is mainly composed of hydroxyapatite and collagen fibers. (techconnect.org)
  • 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)
  • 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)
  • Amorphous calcium phosphate (ACP) is a glassy solid that is formed from the chemical decomposition of a mixture of dissolved phosphate and calcium salts (e.g. (wikipedia.org)
  • The resulting amorphous mixture consists mostly of calcium and phosphate, but also contains varying amounts of water and hydrogen and hydroxide ions, depending on the synthesis conditions. (wikipedia.org)
  • The composition of amorphous calcium phosphate is CaxHy(PO4)z·nH2O, where n is between 3 and 4.5. (wikipedia.org)
  • A commercial preparation of ACP is casein phosphopeptide-amorphous calcium phosphate (CPP-ACP), derived from cow milk. (wikipedia.org)
  • Following investigations into the composition of amorphous calcium phosphates precipitated under different conditions, Posner and Betts suggested in the mid-1970s that the structural unit of ACP was a neutral cluster Ca9(PO4)6. (wikipedia.org)
  • Amorphous calcium phosphate in combination with casein phosphopeptide has been used as a dental treatment to treat incipient dental decay. (wikipedia.org)
  • We report on the position-controlled deposition of 3D nanoflowers composed of several nano leaves with sharp tips using chemical …We report the synthesis of zinc oxide (ZnO) nano-leaves and nano-rods under high and extremely high alkaline experimental conditions, via a simple and low-temperature method. (teamb31-stetten.de)
  • Calculations support the description of a cluster with central Ca2+ ion surrounded by six phosphate PO43− anions, which in turn are surrounded by eight further calcium ions. (wikipedia.org)
  • The idea behind it is that the posner molecules meld and release calcium-ions which stimulises the neurons. (wikipedia.org)
  • In chemistry, a base is a chemical species that donates electrons, accepts protons, or releases hydroxide ions in aqueous solution. (tutordale.com)
  • She continues a hydrothermal program at Winthrop, the main objective on the relationships between aqueous chemistry and crystal shape. (winthrop.edu)
  • citation needed] ACP lacks the long-range, periodic atomic-scale order of crystalline calcium phosphates. (wikipedia.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)
  • In the present study, the calcium phosphate powders (HAP, HAP-TCP) were produced by a precipitation technique involving the use of aqueous solutions of calcium nitrate and diammonium hydrogen phosphate. (metu.edu.tr)
  • Thermochimie des solutions aqueuses: calculs de solubilité de composés inorganiques (phosphates, carbonates, oxalates. (epfl.ch)
  • 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)
  • Title: Comparison of patient acceptance of sodium phosphate versus polyethylene glycol plus sodium picosulfate for colon cleansing in Japanese. (aablocks.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)
  • The volume begins with this introductory chapter then proceeds to the chemical properties of inorganic phosphate that enable its several biological roles. (tutordale.com)
  • The dimeric phosphoric anhydride inorganic pyrophosphate is then addressed as the central functional group that enables the POP anhydride linkage to function throughout biology via the dual properties of thermodynamic activation coupled to kinetic stability in aqueous medial at physiological pH values. (tutordale.com)
  • Indeed, in a study originally aimed to show that the bonding phenomenon is chemical in nature, surface topography changes in the micrometer range were observed in hydroxyapatite ceramic implants, suggesting that micromechanical interlocking contributed to the bonding mechanism [8]. (toysis.pics)
  • Title: Citrate, not phosphate, can dissolve calcium oxalate monohydrate crystals and detach these crystals from renal tubular cells. (aablocks.com)
  • Unfolded phosphopeptides are believed to sequester ACP nanoclusters and form stable complexes in other biofluids such as urine and blood serum, preventing deposition of insoluble calcium phosphates and calcification of soft tissue. (wikipedia.org)
  • 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)
  • Nanostructured TiO2-Al2O3 films and powders were prepared by a straightforward aqueous particulate sol-gel route. (sharif.edu)
  • 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)
  • 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)
  • Méthodologie expérimentale : plans statistiques d'expérience, en particulier dans le domaine des biomatériaux (planification d'expériences in vitro et in vivo). (epfl.ch)
  • Chemical Properties of Calcium Phosphate" Encyclopedia , https://encyclopedia.pub/entry/31249 (accessed December 02, 2023). (encyclopedia.pub)
  • Synthesis of Hybrid Polyphenol/Hydroxyapatite Nanomaterials with Anti-Radical Properties. (upmc.fr)
  • Hydroxyapatite: Structure and properties. (dokumen.pub)
  • Studies have shown that it does form a remineralized phase of hydroxyapatite consistent with the natural enamel. (wikipedia.org)
  • As the main biomineral component in enamel and dentine, hydroxyapatite is responsible for their higher mechanical performances. (hindawi.com)
  • Preforms of calcium phosphate ceramics were produced by using a modified slip casting technique. (metu.edu.tr)
  • Synthesis of Oxide and Non-Oxide Advanced Ceramics. (pitt.edu)
  • New iron phosphate and borophosphate compounds were synthesized and characterized by single crystal/powder X-ray diffraction, infrared spectroscopy, raman spectroscopy, thermogravimetric analysis, electron microscopy and elemental analysis. (metu.edu.tr)
  • 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)
  • Nanostructured TiO2-SnO2 thin films and powders were prepared by a facile aqueous particulate sol-gel route. (sharif.edu)
  • 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)
  • Transfer of P as the PO32 group opens the biological world of phosphate monoesters brought about by phosphoryl transfer enzymes and includes all the kinases for low molecular weight metabolites and for proteins in their myriads. (tutordale.com)
  • The concentration of calcium phosphate is higher in milk than in serum, but it rarely forms deposits of insoluble phosphates. (wikipedia.org)
  • In the laboratory, stored samples of formulations of artificial blood, serum, urine and milk (which approximate the pH of the naturally occurring fluid) deposit insoluble phosphates. (wikipedia.org)
  • see Serum Calcium . (medscape.com)
  • The parathyroid gland has a remarkable sensitivity to ionized serum calcium changes. (medscape.com)
  • After this threshold, the mechanical performances decrease dramatically due to both the hydroxyapatite agglomerates formation and the low degree of resin conversion. (hindawi.com)
  • Title: Interaction of the non-phosphorylated peptide G7-18NATE with Grb7-SH2 domain requires phosphate for enhanced affinity and specificity. (aablocks.com)