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Relevant bibliographies by topics / Apatite calcium

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Academic literature on the topic 'Apatite calcium'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

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Journal articles on the topic "Apatite calcium"

1

Soumia, Belouafa. "Oxygenated Apatites: Effect of Calcium Salt Nature and Synthesis Parameters." Der Pharma Chemica 14, no. 4 (2022): 8. https://doi.org/10.4172/0975-413X.14.4. 26-33.

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Apatitic calcium phosphates, reported in this study, are prepared following a precipitation reaction between phosphoric acid (H3PO4) and a calcium salt. Used salts are calcium carbonate (CaCO3), calcium nitrate (Ca(NO3)2) and calcium chloride (CaCl2). The variation in the chemical composition and crystallinity of oxygenated apatites, carbonated or not, depending on the nature of the reagents and the synthesis parameters was studied by X-ray diffraction, infrared spectroscopy and by chemical analysis. The insertion of molecular oxygen into the apatite tunnel is achieved through the use of hydro

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Belouafa, Soumia, Hassan Chaair, and Khalid Digua. "Oxygenated Apatites: Effect of Calcium Salt Nature and Synthesis Parameters." Der Pharma Chemica 14, no. 4 (2022): 8. https://doi.org/10.5281/zenodo.13354658.

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Apatitic calcium phosphates, reported in this study, are prepared following a precipitation reaction between phosphoric acid (H3PO4) and a calcium salt. Used salts are calcium carbonate (CaCO3), calcium nitrate (Ca(NO3)2) and calcium chloride (CaCl2). The variation in the chemical composition and crystallinity of oxygenated apatites, carbonated or not, depending on the nature of the reagents and the synthesis parameters was studied by X-ray diffraction, infrared spectroscopy and by chemical analysis. The insertion of molecular oxygen into the apatite tunnel is achieved through the use of hydro

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Kunio, Ishikawa, Shigeki Matsuya, Yumiko Suzuki, Koh-ichi Udoh, Masaharu Nakagawa, and Kiyoshi Koyano. "Fabrication of Apatite Monolith from Calcium Sulphate." Key Engineering Materials 288-289 (June 2005): 533–36. http://dx.doi.org/10.4028/www.scientific.net/kem.288-289.533.

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Present study evaluated the feasibility of apatite monolith preparation from calcium sulfate monolith using ammonium phosphate solution. We found that calcium phosphate monolith transforms to apatitic monolith without changing its original morphology when a proper temperature and a proper phosphate solution was selected. Prepared apatite was B-type carbonate apatite with low crystallinity. Although mechanical strength of the apatite monolith was lower than original calcium sulphate monolith, we concluded present method may be useful for the fabrication of apatite monolith since we can prepare

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Drouet, Christophe. "Apatite Formation: Why It May Not Work as Planned, and How to Conclusively Identify Apatite Compounds." BioMed Research International 2013 (2013): 1–12. http://dx.doi.org/10.1155/2013/490946.

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Calcium phosphate apatites are inorganic compounds encountered in many different mineralized tissues. Bone mineral, for example, is constituted of nanocrystalline nonstoichiometric apatite, and the production of “analogs” through a variety of methods is frequently reported. In another context, the ability of solid surfaces to favor the nucleation and growth of “bone-like” apatite upon immersion in supersaturated fluids such as SFB is commonly used as one evaluation index of the “bioactivity” of such surfaces. Yet, the compounds or deposits obtained are not always thoroughly characterized, and

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Rhilassi, Abdelhadi El, and Mounia Bennani-Ziatni. "Experimental study on the interaction of insulin with apatitic calcium phosphates analogous to bone mineral: adsorption and release." Current Chemistry Letters 11, no. 4 (2022): 341–52. http://dx.doi.org/10.5267/j.ccl.2022.6.003.

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The present work investigated the interaction of human insulin with synthesized poorly crystalline apatitic calcium phosphates containing simultaneously HPO42- and CO32- ions in various amount. The adsorption kinetics is very fast, while the release kinetics is generally slow. The chemical composition of apatite has an influence on both the adsorption and release processes. The experimental results show that the percentage of insulin adsorption and release decreased with the increase of the content of carbonate. The equilibrium adsorption data are fitted into Langmuir, Freundlich, Elovich, Tem

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Johnsson, Mats S. A., and George H. Nancollas. "The Role of Brushite and Octacalcium Phosphate in Apatite Formation." Critical Reviews in Oral Biology & Medicine 3, no. 1 (1992): 61–82. http://dx.doi.org/10.1177/10454411920030010601.

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Studies of apatite mineral formation are complicated by the possibility of forming several calcium phosphate phases. The least soluble, hydroxyapatite (HAP), is preferentially formed under neutral or basic conditions. In more acidic solutions phases such as dicalcium phosphate dihydrate (Brushite, DCPD) and octacalcium phosphate (OCP) are often found. Even under ideal HAP precipitation conditions the precipitates are generally nonstoichiometric, suggesting the formation of calcium-deficient apatites. Both DCPD and OCP havea been implicated as possible precursors to the formation of apatite. Th

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Rodríguez-Lorenzo, Luis M., Blanca Vázquez, and Julio San Román. "Surface Modification of Calcium Hydroxyfluor Carbonate Apatites by Bisphosphonates." Key Engineering Materials 284-286 (April 2005): 357–60. http://dx.doi.org/10.4028/www.scientific.net/kem.284-286.357.

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Hydroxyapatite has been frequently described as an osteoconductive but not osteoinductive material based on failure to observe bone formation in nonbony sites. Bisphosphonates (BPs) are stable pyrophosphate analogs, that enhance the proliferation, differentiation and bone forming activity of osteoblasts and are potent inhibitors of bone resorption. In this paper, the modification of a calcium hydroxyfluor carbonate apatite with sodium alendronate and (4-(aminomethyl)benzene)bisphosphonic acid is described. The surface modification is carried out by refluxing the apatite in a bisphosphonate ace

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Shimoda, S., T. Aoba, E. C. Moreno, and Y. Miake. "Effect of Solution Composition on Morphological and Structural Features of Carbonated Calcium Apatites." Journal of Dental Research 69, no. 11 (1990): 1731–40. http://dx.doi.org/10.1177/00220345900690110501.

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The composition of enamel mineral corresponds to that of a calcium carbonato-apatite. For insight to be gained into the precipitation of carbonato-apatites having specific properties (crystal size, morphology, and carbonate incorporation into the crystal lattice), apatites were prepared at 80°C in aqueous systems having various CO3 concentrations and pH values of around 7.5 or 10.5 (± 0.5). The various preparations had a wide range (0.005 to 0.19) of CO3/Ca molar ratios that bracket the ratios found in porcine enamel mineral at various developmental stages. Fourier transform infrared spectrosc

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Soroka, A. P., I. V. Suhenko, V. H. Kasianenko, V. L. Karbivskii, L. I. Karbivska, and S. S. Smolyak. "Electronic structure of calcium and cadmium arsenate apatites." Low Temperature Physics 51, no. 3 (2025): 375–83. https://doi.org/10.1063/10.0035843.

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The electronic structure of a wide range of apatite compounds Me10(AsO4)6X2, where Me = Ca and Cd, X = F, Cl, OH, and Br, has been calculated using first principles within the framework of density functional theory. This was achieved via the full-potential all-electron augment plane wave (APW) method with a set of basis functions with the addition of local orbitals (APW + lo). The study established the effects of changes in spatial charge distributions and the energy structure of valence and conduction bands for apatites in the specified series. Bader charge analysis was performed to clarify t

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Ingram, G. S., and W. M. Edgar. "Calcium Salt Precipitation and Mechanisms of Inhibition Under Oral Conditions." Advances in Dental Research 9, no. 4 (1995): 427–32. http://dx.doi.org/10.1177/08959374950090041301.

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Dental calculus contains a range of calcium phosphates, derived from plaque fluid and the saliva. Older deposits tend to contain more hydroxyapatite and 6 tricalcium phosphate. Compounds which inhibit the transformation of calcium phosphate nuclei to hydroxyapatite and its subsequent crystal growth are known to be effective in restricting calculus deposition in vivo. Such compounds include the diphosphonates, polyphosphates, and zinc. Under physiological conditions, apatites tend to be calcium-deficient with matching HP042- groups. If these groups are displaced, then crystal growth is inhibite

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Dissertations / Theses on the topic "Apatite calcium"

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Gonzales, Veronica Lourdes Escobar. "Stability of calcium phosphate arsenate compounds." Thesis, Imperial College London, 1992. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.341898.

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Vandecandelaere, Nicolas. "Élaboration et caractérisation de biomatériaux osseux innovants à base d'apatites phospho-calciques dopées." Phd thesis, Toulouse, INPT, 2012. http://oatao.univ-toulouse.fr/13956/1/vandecandelaere_partie_1_sur_2.pdf.

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Les infections nosocomiales post-opératoires en sites osseux posent un problème majeur de santé publique. L'utilisation de biocéramiques bioactives et résorbables qui présenteraient des propriétés antibactériennes apparaît comme une des solutions les plus prometteuses pour lutter contre l'invasion de micro-organismes au niveau du site opératoire. Les apatites nanocristallines biomimétiques se révèlent être des candidats de choix pour ces applications en raison de leur similitude avec le minéral osseux et de leur forte réactivité de surface. Cependant, elles ne possèdent pas de propriétés antib

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Kensche, Anna, Sandra Pötschke, Christian Hannig, Gert Richter, Wiebke Hoth-Hannig, and Matthias Hannig. "Influence of Calcium Phosphate and Apatite Containing Products on Enamel Erosion." Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2017. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-217520.

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For the purpose of erosion prevention the present study aimed to compare the efficacy of two biomimetic products and a fluoride solution to optimize the protective properties of the pellicle. After 1 min of in situ pellicle formation on bovine enamel slabs, 8 subjects adopted CPP-ACP (GC Tooth Mousse), a mouthwash with hydroxyapatite microclusters (Biorepair), or a fluoride based mouthwash (elmex Kariesschutz) for 1 min each. Afterwards, samples were exposed in the oral cavity for 28 min. Native enamel slabs and slabs exposed to the oral cavity for 30 min without any rinse served as controls.

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Kensche, Anna, Sandra Pötschke, Christian Hannig, Gert Richter, Wiebke Hoth-Hannig, and Matthias Hannig. "Influence of Calcium Phosphate and Apatite Containing Products on Enamel Erosion." Hindawi, 2016. https://tud.qucosa.de/id/qucosa%3A30115.

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For the purpose of erosion prevention the present study aimed to compare the efficacy of two biomimetic products and a fluoride solution to optimize the protective properties of the pellicle. After 1 min of in situ pellicle formation on bovine enamel slabs, 8 subjects adopted CPP-ACP (GC Tooth Mousse), a mouthwash with hydroxyapatite microclusters (Biorepair), or a fluoride based mouthwash (elmex Kariesschutz) for 1 min each. Afterwards, samples were exposed in the oral cavity for 28 min. Native enamel slabs and slabs exposed to the oral cavity for 30 min without any rinse served as controls.

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Bennani-Ziatni, Mounia. "Etude du système phosphate de calcium, carbonate de calcium en milieu eau-éthanol." Toulouse, INPT, 1986. http://www.theses.fr/1986INPT004G.

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Composition des phases coprecipitees pour differents rapports carbonate-phosphate. Il existe des domaines monophases, amorphes et polyphases. Stabilite thermique des apatites carbonatees et des calcites phosphatees

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Petit, Ivan. "Vers une meilleure description des interfaces entre biominéraux et milieux biologiques par une approche combinée théorique et expérimentale." Thesis, Paris Sciences et Lettres (ComUE), 2017. http://www.theses.fr/2017PSLET031/document.

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On appelle biominéraux l’ensemble des minéraux fabriqués par le vivant. Ce sont des matériaux essentiels, présents dans la quasi-totalitédes espèces vivantes. Néanmoins les caractéristiques structurales, chimiques ainsi que les mécanismes de formation, et l’évolution de cesmatériaux sont encore fortement débattus. Cela s’explique notamment par les difficultés à étudier expérimentalement des espèces chimiquesévoluant en milieux biologiques.Bien que tout aussi complexe, une approche théorique, à l’échelle moléculaire, peut aider à la caractérisation de ces matériaux biologiqueset notamment la ca

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Donazzon, Benoit. "Céramiques apatitiques basse température : élaboration -propriétés." Toulouse, INPT, 1998. http://www.theses.fr/1998INPT009C.

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Les apatites me#1#0(xo#4)#6y#2 presentent un grand interet dans divers domaines : aussi bien dans les biomateriaux comme substitut osseux, que dans le stockage des dechets radioactifs comme matrice de conditionnement. Generalement, la preparation de pieces massives en apatite est effectuee a partir d'apatite pulverulente frittee a haute temperature (t<1000c). Le chapitre i est consacre a des rappels de base sur les phosphates de calcium, les ciments, les biomateriaux et les dechets radioactifs. Le chapitre ii decrit une methode permettant l'obtention de pieces massives a basse temperature (a p

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Raynaud, Sylvie. "Synthèse, frittage et propriétés mécaniques de phosphates de calcium dans le système hydroxyapatite - phosphate tricalcique." Limoges, 1999. http://www.theses.fr/1999LIMO0035.

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Des phosphates de calcium de rapport molaire ca/p compris entre 3/2 et 10/6 ont ete synthetises par precipitation en milieu aqueux. Les poudres sont monophasees de structure apatitique mais de stoechiometrie variable en calcium ca 1 0 x@ x(hpo 4) x(po 4) 6 x(oh) 2 x@ x (@ lacune, 0 x 1). Le rapport ca/p varie avec la temperature de synthese, il est maitrise par le controle precis de cette temperature. La calcination entre 400\c et 700\c fait diminuer la surface specifique des poudres sans densification par coalescence des particules. L'accroissement de la concentration en lacunes dans la struc

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Ross, Jessica. "Phosphorus and Carbon Capture from Synthetic Municipal Wastewater by Carbonate Apatite Precipitation." Thesis, Université d'Ottawa / University of Ottawa, 2017. http://hdl.handle.net/10393/36437.

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The world’s 7 billion inhabitants depend on chemical fertilizers to meet the growing demand for food. The phosphorus used in fertilizer is sourced from ancient sedimentary deposits of Phosphate Rock (PR), largely in the form of carbonate calcium phosphate, called carbonate apatite, which resembles bone. PR is non-renewable and Canada’s reserves are extremely limited; currently, all 1,400,000 tonnes of phosphorus products used annually are imported. This project investigates a novel method to recycle phosphorus from municipal wastewater in a form that will enable its reuse as a fertilizer, thro

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Marraha, Mohamed. "Synthèse et étude physico-chimique des phosphosulfates de calcium de structure [Béta] Ca3(PO4)2." Toulouse, INPT, 1989. http://www.theses.fr/1989INPT025G.

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Ce memoire concerne la synthese, le comportement a haute temperature, la structure et les proprietes physico-chimiques des phosphosulfates et arseniosulfates de calcium de structure bete ca3(po4)2. Le premier chapitre s'interesse au mecanisme de formation des phosphosulfates de calcium. Une etude systematique du systeme ca3(po4)2-caso4 a permis de proposer la formule generale ca21-x(po4)14-2x(so4)2x (0 inferieur ou egal a 1) ou les ions sulfate substituent les ions phosphate dans les sites preferentiels. Le compose limite a pour formule ca20(po4)12(so4)2. Le deuxieme chapitre s'interesse au co

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Books on the topic "Apatite calcium"

1

Elliott, J. C. Structure and chemistry of the apatitesand other calcium orthophosphates. Elsevier, 1994.

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Structure and chemistry of the apatites and other calcium orthophosphates. Elsevier, 1994.

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Calcium orthophosphates: Applications in nature, biology, and medicine. Pan Stanford, 2012.

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Vaughan, David. 5. Minerals and the living world. Oxford University Press, 2014. http://dx.doi.org/10.1093/actrade/9780199682843.003.0005.

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‘Minerals and the living world’ considers various mineral–microbe interactions, biomineralization, and how minerals interact with the human body and human health. Biomineralization is the process where living organisms produce minerals such as calcite, apatite, and silica. An example is the unicellular, ocean-living radiolaria that have complex silica skeletons. After death their skeletal remains sink to the ocean floor and can be seen preserved in cherts and flints. Human biominerals can be divided into those which are an essential part of the bodies’ systems, such as hydroxylapatite found in

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Elliott, J. C. Structure and Chemistry of the Apatites and Other Calcium Orthophosphates. Elsevier Science & Technology Books, 2013.

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Structure and Chemistry of the Apatites and Other Calcium Orthophosphates. Elsevier, 1994. http://dx.doi.org/10.1016/c2009-0-10247-7.

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Book chapters on the topic "Apatite calcium"

1

Choi, Andy H., and Besim Ben-Nissan. "Calcium Phosphate Nanocoated Coralline Apatite." In Calcium Phosphate Nanocoatings for Bone Regeneration. Springer Nature Singapore, 2023. http://dx.doi.org/10.1007/978-981-99-5506-0_8.

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Ishikawa, Kunio, Shigeki Matsuya, Yumiko Suzuki, Koh-ichi Udoh, Masaharu Nakagawa, and Kiyoshi Koyano. "Fabrication of Apatite Monolith from Calcium Sulphate." In Advanced Biomaterials VI. Trans Tech Publications Ltd., 2005. http://dx.doi.org/10.4028/0-87849-967-9.533.

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Layrolle, Pierre, and Guy Daculsi. "Physicochemistry of Apatite and Its Related Calcium Phosphates." In Thin Calcium Phosphate Coatings for Medical Implants. Springer New York, 2008. http://dx.doi.org/10.1007/978-0-387-77718-4_2.

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Kasuga, Toshihiro, Emiko Ueno, and Akiko Obata. "Preparation of Apatite-Containing Calcium Phosphate Glass-Ceramics." In Key Engineering Materials. Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-422-7.157.

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Zhou, Hong Hui, Hui Li, and Ling Hong Guo. "Molecular and Crystal Structure Characterization of Calcium-Deficient Apatite." In Key Engineering Materials. Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-422-7.119.

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Sonowal, Lidiya, and Sanjeev Gautam. "Self-Assembly and Nano-Layering of Apatite Calcium Phosphates in Biomaterials." In Advanced Synthesis and Medical Applications of Calcium Phosphates. CRC Press, 2024. http://dx.doi.org/10.1201/9781003360605-5.

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Rhee, Sang Hoon, Il Yong Chung, Yong Keun Lee, Bum Soon Lim, and Yang Jo Seol. "Apatite Forming Ability of a Non-Woven Silica Fabric Containing Calcium." In Key Engineering Materials. Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-422-7.699.

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Leonor, Isabel B., Francisco Balas, Masakazu Kawashita, Rui L. Reis, Tadashi Kokubo, and Takashi Nakamura. "Biomimetic Apatite Formation on Different Polymeric Microspheres Modified with Calcium Silicate Solutions." In Bioceramics 18. Trans Tech Publications Ltd., 2006. http://dx.doi.org/10.4028/0-87849-992-x.279.

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Billon Chabaud, Aurelie, Christian Merle, and Jean Michel Bouler. "Influence of Association Type of Bisphosphonates with Calcium-Deficient Apatite on Drug Release." In Bioceramics 20. Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-457-x.51.

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Morita, Yasuyuki, Toshiki Miyazaki, Eiichi Ishida, and Chikara Ohtsuki. "Apatite-Forming Ability of Organic-Inorganic Hybrids Prepared from Calcium Silicate and Glucomannan." In Bioceramics 20. Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/0-87849-457-x.567.

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Conference papers on the topic "Apatite calcium"

1

MENDONÇA, THIAGO VINUTO, SAMUEL BICALHO HENRIQUES, BRENDA ELLEN DE SOUZA MARTINS, ESTHER DIAS DE SOUZA, FERNANDO LUCIANO ALVES DE SOUZA, and ANDREIA BICALHO HENRIQUES. "CARACTERIZAçãO E AVALIAçãO DA FLOTABILIDADE DE APATITA, DOLOMITA E CALCITA UTILIZANDO UM BIODIESEL COMO COLETOR." In 22º Enemet - Encontro Nacional de Estudantes de Engenharia Metalúrgica, de Materiais e de Minas. Editora Blucher, 2024. http://dx.doi.org/10.5151/2594-4711-41260.

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Antolotti, N., S. Bertini, A. Scrivani, et al. "Interface Characterization of Different Apatite Coatings." In ITSC 1998, edited by Christian Coddet. ASM International, 1998. http://dx.doi.org/10.31399/asm.cp.itsc1998p1121.

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Abstract The decomposition of bioactive plasma sprayed apatite layers and the weakness of their interface with the metallic substrate limit the longevity of orthopaedic prostheses. Analysis of the coating and of the metal-apatite interface using EDS, XPS, and IR techniques indicates alterations of the apatite composition which can be related to several chemical reactions occurring either in the plasma or on the surface of the implant. EDS shows a calcium-rich layer on the apatite side of the interface whereas after dissolution of the apatite, XPS indicates that phosphorus atoms are incorporate

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Wang, G. C., X. Y. Liu, and C. X. Ding. "Plasma-Sprayed Calcium Oxide Stabilized Zirconia Coatings for Biomedical Application." In ITSC2007, edited by B. R. Marple, M. M. Hyland, Y. C. Lau, C. J. Li, R. S. Lima, and G. Montavon. ASM International, 2007. http://dx.doi.org/10.31399/asm.cp.itsc2007p0377.

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Abstract Calcium oxide stabilized zirconia coatings have been deposited onto Ti-6Al-4V substrates by means of atmospheric plasma spraying and incubated in the simulated body fluid for different periods of time to investigate the formation of apatite on their surface. The phase composition and microstructure of the coatings before and after immersion were examined by scanning electron microscopy and X-ray diffraction. The results obtained showed that apatite can be formed on the coating soaked in SBF solution, which indicated that calcium oxide stabilized zirconia possessed good bioactivity.

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Liu, X., Y. Xie, and C. Ding. "Bioactivity of Plasma Sprayed Calcium Silicate/ZrO2 Composite Coatings." In ITSC2007, edited by B. R. Marple, M. M. Hyland, Y. C. Lau, C. J. Li, R. S. Lima, and G. Montavon. ASM International, 2007. http://dx.doi.org/10.31399/asm.cp.itsc2007p0393.

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Abstract In this work, 30wt% calcium silicate, including wollastonite and dicalcium silicate, were mixed with 70wt% ZrO2, respectively. The composite powders were deposited onto Ti-6Al-4V substrates to prepare wollastonite/ZrO2 and dicalcium silcate/ZrO2 composite coatings using plasma spraying technology. The bioactivity of coatings was evaluated using simulated body fluid soaking test. After the composite coatings were soaked in simulated body fluid for a certain period, apatite was formed on the surface of the wollastonite/ZrO2 and dicalcium silcate/ZrO2 composite coatings. In addition, the

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Katti, Kalpana S., Devendra Verma, Rahul Bhowmik, and Dinesh R. Katti. "Bioactivity and Mechanical Behavior of Polymer-Hydroxyapatite Composite Biomaterials for Bone Tissue Engineering." In ASME 2006 International Manufacturing Science and Engineering Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/msec2006-21051.

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Achieving optimal mechanical strength of scaffolds is the key issue in bone tissue engineering. We describe a biomimetic route for design of composites of polymers (polyacrylic acid (PAAc) and polycaprolactone (PCL)) and hydroxyapatite (HAP). The mineral polymer interfaces have a significant role on mechanical behavior as well as bioactivity of the composite systems. We have used a combination of experimental (photoacoustic infrared spectroscopy) as well as modeling (molecular dynamics) techniques to evaluate the nature of interfaces in the composites. Porous composite scaffolds of in situ HAP

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Shi, J. M., C. X. Ding, and X. Q. Wu. "Preparation of Bioactive and Porous Titanium Coating by Vacuum Plasma Spraying and Chemical Treatment." In ITSC2001, edited by Christopher C. Berndt, Khiam A. Khor, and Erich F. Lugscheider. ASM International, 2001. http://dx.doi.org/10.31399/asm.cp.itsc2001p0593.

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Abstract This article describes a method of preparing bioactive and porous titanium coatings on titanium-based substrate using vacuum plasma spraying and chemical treatment in alkali solution. The porous titanium coating was fabricated in two-layer structure. The bond strength, average porosity and roughness (Ra) of the porous titanium coating are 55MPa, 30% and 21µm, respectively. The chemical treatment of as-sprayed titanium coatings was carried out in 5.0M NaOH solutions at 40 °C for 24h. The surface morphology and structure of the porous titanium coating before and after chemical treatment

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Wu, Y., Z. Li, D. He, Q. Zhao, H. Li, and H. Li. "Bioactivity of Micro-Plasma Sprayed Yttria Stabilized Zirconia Coating." In ITSC2008, edited by B. R. Marple, M. M. Hyland, Y. C. Lau, C. J. Li, R. S. Lima, and G. Montavon. Verlag für Schweißen und verwandte Verfahren DVS-Verlag GmbH, 2008. http://dx.doi.org/10.31399/asm.cp.itsc2008p1013.

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Abstract Yttria-stabilized zirconia coatings were deposited onto a Ti-6Al-4V substrate through a microplasma spray technique and incubated in simulated body fluid (SBF) for different periods of time (3, 7, 14, 28 days). The formation of apatite on the surface was investigated to evaluate the bioactivity of the coatings. Surface morphologies and structural changes in the coatings before and after immersion were analyzed by optical microscopy, scanning electron microscopy, and x-ray diffractometry. The calcium (Ca2+) concentration in the solutions was measured directly after the samples were rem

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Bsat, S., B. De Snoo, and X. Huang. "Corrosion Resistance and Apatite Forming Ability of Plasma Sprayed CP-Ti/Bioglass Composite Coating." In ITSC 2016, edited by A. Agarwal, G. Bolelli, A. Concustell, et al. DVS Media GmbH, 2016. http://dx.doi.org/10.31399/asm.cp.itsc2016p0836.

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Abstract This work investigates the biofunctionality and corrosion resistance of titanium (Ti) and Ti/bioglass composite coatings. Commercially pure Ti (CP-Ti) and 45S5 bioglass powders were deposited on CP-Ti plates by air plasma spraying and the coating samples were placed in Hanks’ balanced salt solution for simulated body fluid (SBF) testing. After four weeks of immersion, the coatings were examined by SEM imaging and EDS and XRD analysis. EDS analysis showed that the Ca content on the Ti/bioglass coatings increased from 4 to 16 wt%, while no increase in Ca was observed on the Ti coatings.

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Mostafa, Amany A., Khaled R. Mohamed, Tarek M. Dahy, and Gehan T. El-Bassyouni. "Characterization and In-Vitro Assessment of Nano-Hydroxyapatite Prepared by Polymeric Route." In ASME 2008 2nd Multifunctional Nanocomposites and Nanomaterials International Conference. ASMEDC, 2008. http://dx.doi.org/10.1115/mn2008-47056.

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Hydroxyapatite is the most used calcium phosphate in implant production. In this study a novel method for the preparation of nano-hydroxyapatite is described. A mixture of calcium chloride and potassium hydrogen phosphate were introduced to the urea-formaldehyde resin during formation. The obtained resin was precalcined at 450°C to get rid of the organic materials. The prepared powder was characterized using XRD, thermal analysis (DTA, TG), FT-IR, TEM and SEM supplemented with EDAX. In particular, the results of XRD show that the powder produced at 900°C was wholly formed of nano-hydroxyapatit

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Español Pons, M., K. A. Khor, P. Cheang, V. Guipont, M. Jeandin, and N. Llorca-lsern. "In Vitro Changes on High-Pressure Plasma Sprayed Hydroxyapatite Coatings." In ITSC2001, edited by Christopher C. Berndt, Khiam A. Khor, and Erich F. Lugscheider. ASM International, 2001. http://dx.doi.org/10.31399/asm.cp.itsc2001p0105.

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Abstract The aim of this paper is to study the behavior of two different sets of as-sprayed coatings obtained from two different starting HA powders, in a defined simulated body fluid (SBF) for a period of 28 days. Spray-dried hydroxyapatite (SDHA) and spheroidized hydroxyapatite (SHA) were the two selected powders. A Controlled Atmosphere Plasma Spraying system (CAPS) was use for the production of the coatings. Effect of pressure and surrounding atmosphere during the spraying of the coatings, were also evaluated. During the in-vitro test, dissolution of the coatings and precipitation of a poo

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Reports on the topic "Apatite calcium"

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Vermeul, Vincent R., Brad G. Fritz, Jonathan S. Fruchter, James E. Szecsody, and Mark D. Williams. 100-NR-2 Apatite Treatability Test: High-Concentration Calcium-Citrate-Phosphate Solution Injection for In Situ Strontium-90 Immobilization. Office of Scientific and Technical Information (OSTI), 2010. http://dx.doi.org/10.2172/1010480.

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Williams, Mark D., Brad G. Fritz, Donaldo P. Mendoza, et al. Interim Report: 100-NR-2 Apatite Treatability Test: Low Concentration Calcium Citrate-Phosphate Solution Injection for In Situ Strontium-90 Immobilization. Office of Scientific and Technical Information (OSTI), 2008. http://dx.doi.org/10.2172/969183.

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Vermeul, Vincent R., Brad G. Fritz, Jonathan S. Fruchter, James E. Szecsody, and Mark D. Williams. 100-NR-2 Apatite Treatability Test FY09 Status: High Concentration Calcium-Citrate-Phosphate Solution Injection for In Situ Strontium-90 Immobilization. Office of Scientific and Technical Information (OSTI), 2009. http://dx.doi.org/10.2172/969621.

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Corriveau, L., and E. G. Potter. Advancing exploration for iron oxide-copper-gold and affiliated deposits in Canada: context, scientific overview, outcomes, and impacts. Natural Resources Canada/CMSS/Information Management, 2024. http://dx.doi.org/10.4095/332495.

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The Geo-mapping for Energy and Minerals (GEM) and Targeted Geoscience Initiative (TGI) programs conducted extensive collaborative research on mineral systems with iron oxide-copper-gold (IOCG) and affiliated deposits in prospective settings of Canada. Regional alteration mapping as well as geochemical and geophysical modelling undertaken under the GEM program documented the evolution of polymetallic metasomatic systems with iron-oxide and alkali-calcic alteration and led to an increased recognition of the mineral potential of poorly explored areas and historic deposits of the Great Bear magmat

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Corriveau, L., J. F. Montreuil, O. Blein, et al. Metasomatic iron and alkali calcic (MIAC) system frameworks: a TGI-6 task force to help de-risk exploration for IOCG, IOA and affiliated primary critical metal deposits. Natural Resources Canada/CMSS/Information Management, 2021. http://dx.doi.org/10.4095/329093.

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Australia's and China's resources (e.g. Olympic Dam Cu-U-Au-Ag and Bayan Obo REE deposits) highlight how discovery and mining of iron oxide copper-gold (IOCG), iron oxide±apatite (IOA) and affiliated primary critical metal deposits in metasomatic iron and alkali-calcic (MIAC) mineral systems can secure a long-term supply of critical metals for Canada and its partners. In Canada, MIAC systems comprise a wide range of undeveloped primary critical metal deposits (e.g. NWT NICO Au-Co-Bi-Cu and Québec HREE-rich Josette deposits). Underexplored settings are parts of metallogenic belts that extend in

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Litaor, Iggy, James Ippolito, Iris Zohar, and Michael Massey. Phosphorus capture recycling and utilization for sustainable agriculture using Al/organic composite water treatment residuals. United States Department of Agriculture, 2015. http://dx.doi.org/10.32747/2015.7600037.bard.

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Objectives: 1) develop a thorough understanding of the sorption mechanisms of Pi and Po onto the Al/O- WTR; 2) determine the breakthrough range of the composite Al/O-WTR during P capturing from agro- wastewaters; and 3) critically evaluate the performance of the composite Al/O-WTR as a fertilizer using selected plants grown in lysimeters and test-field studies. Instead of lysimeters we used pots (Israel) and one- liter cone-tainers (USA). We conducted one field study but in spite of major pretreatments the soils still exhibited high enough P from previous experiments so no differences between

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