Relevant bibliographies by topics / Magnesium phosphates

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Academic literature on the topic 'Magnesium phosphates'

Author: Grafiati
Published: 10 March 2023

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Journal articles on the topic "Magnesium phosphates"

1

Gu, Xiang, Yan Li, Chao Qi, and Kaiyong Cai. "Biodegradable magnesium phosphates in biomedical applications." Journal of Materials Chemistry B 10, no. 13 (2022): 2097–112. http://dx.doi.org/10.1039/d1tb02836g.

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This review comprehensively summarizes the state-of-the-art progress made in magnesium phosphate-based biomaterials, including nanostructured magnesium phosphates and magnesium phosphate-based cements, ceramics, scaffolds, coatings and so on, as well as their biomedical applications in nanomedicine and tissue engineering.
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2

Kazakova, Gilyana, Tatiana Safronova, Daniil Golubchikov, Olga Shevtsova, and Julietta V. Rau. "Resorbable Mg2+-Containing Phosphates for Bone Tissue Repair." Materials 14, no. 17 (2021): 4857. http://dx.doi.org/10.3390/ma14174857.

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Materials based on Mg2+-containing phosphates are gaining great relevance in the field of bone tissue repair via regenerative medicine methods. Magnesium ions, together with condensed phosphate ions, play substantial roles in the process of bone remodeling, affecting the early stage of bone regeneration through active participation in the process of osteosynthesis. In this paper we provide a comprehensive overview of the usage of biomaterials based on magnesium phosphate and magnesium calcium phosphate in bone reconstruction. We consider the role of magnesium ions in angiogenesis, which is an important process associated with osteogenesis. Finally, we summarize the biological properties of calcium magnesium phosphates for regeneration of bone.
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3

Possenti, Elena, Claudia Conti, G. Diego Gatta, Marco Realini, and Chiara Colombo. "Diammonium Hydrogenphosphate Treatment on Dolostone: the Role of Mg in the Crystallization Process." Coatings 9, no. 3 (2019): 169. http://dx.doi.org/10.3390/coatings9030169.

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The diammonium hydrogenphosphate (DAP, (NH4)2HPO4) reaction with calcite has been extensively investigated. The availability of free calcium ions in the reaction environment has been acknowledged as a crucial factor in the crystallization of calcium phosphates with a high (hydroxyapatite, Ca/P 1.67) or low Ca/P molar ratio (dicalcium phosphate dihydrate, Ca/P 1.00; octacalcium phosphate, Ca/P 1.33). On the contrary, no data are available on the DAP interaction at room temperature with dolomite in terms of reaction mechanism and composition of the reaction products. Here, a multi-analytical approach based on scanning electron microscopy (SEM) coupled with energy dispersive X-ray spectrometry (EDS) and X-ray powder diffraction before and after heating treatments is proposed to explore how the formation of calcium phosphates occur on Mg-enriched substrates and if the presence of magnesium ions during the reaction influences the crystallization process of calcium phosphates. The DAP reaction with polycrystalline dolomite gives rise to the formation of struvite and of poorly crystalline hydroxyapatite. Calcium and magnesium ions mutually interfered in the crystallization of magnesium and calcium phosphates, respectively, whose effects influenced the properties (size, micro-morphology, composition and crystallinity) of the newly-formed phases.
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4

Isaicheva, Lyudmila Anatol'evna, Natal'ya Mikhailovna Trepak, Arlen Leonidovich L'vov та Ivan Alekseevich Kazarinov. "Corrosion and Еlectrochemical Behaviour of Magnesium and Magnesium-Lithium Alloys in Phosphoric Acid Media". Electrochemical Energetics 12, № 3 (2012): 124–28. http://dx.doi.org/10.18500/1608-4039-2012-12-3-124-128.

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The corrosion and electrochemical behavior of magnesium and the MA 21 magnesium-lithium alloys in solutions of moderately acidic phosphates with various additives was studied. The inhibiting effect of nitrate and fluoride ions on the anode dissolution of these objects was revealed. Features of the electrochemical dissolution of magnesium and the magnesium-lithium alloys in nitrate phosphate solutions with fluoride ions caused by their activation-passivation competition have been noted. Distinctive features of the electrochemical behavior of the magnesium-lithium alloys in comparison with pure magnesium in nitrate phosphate fluoride solutions due to their structural and phase specifics have been established.
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5

Yoshida, Katsumi, Hideki Hyuga, Naoki Kondo, and Hideki Kita. "Improvement of Oxidation Resistance of Graphite Powder Treated with Phosphate." Key Engineering Materials 352 (August 2007): 133–36. http://dx.doi.org/10.4028/www.scientific.net/kem.352.133.

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Graphite powder was treated with lanthanum, aluminum and magnesium phosphate solution, and oxidation resistance of the obtained graphite powder was evaluated. Oxidation starting temperature and oxidation completion temperature of graphite powder treated with various phosphates were 50-100oC higher than those of as-received graphite powder. Graphite powder treated with small amount of lanthanum phosphate exhibited the higher oxidation starting temperature than graphite powder treated with aluminum and magnesium phosphates. LaP5O14 would partially exited on graphite powder, and protect the edge carbon atoms of graphite and reduce the reactivity of carbon atoms toward oxygen, resulting in improving the oxidation resistance.
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6

Kazakova, G. K., T. V. Safronova, and T. B. Shatalova. "Ceramics based on powders synthesized from ammonium hydrophosphate and acetates of calcium and magnesium." Materials Science, no. 4 (April 20, 2021): 33–40. http://dx.doi.org/10.31044/1684-579x-2021-0-04-33-40.

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Ceramics the phase composition of which included tricalcium phosphate, calcium magnesium ortophosphate and magnesium pyrophosphate has been produced from nanosized powders synthesized by chemical deposition from 1M aqueous solutions of ammonium hydrogen phosphate and calcium and / or magnesium acetates. According to XRD analysis the phase composition of the powder synthesized from calcium acetate included calcium hydroxyapatite Ca5(PO4)3(OH), octacalcium phosphate Ca8H2(PO4)6·5H2O and brushite CaHPO4·2H2O. The phase composition of the powder synthesized from magnesium acetate included struvite MgNH4PO4·6H2O. And the phase composition of the powder synthesized from solution containing calcium and magnesium acetates at the cation ratio Са: Mg = 9: 1 included hydroxyapatite Ca5(PO4)3(OH), whitlockite Ca18Mg2H2(PO4)14, and struvite MgNH4PO4·6H2O. Ceramic materials containing the bioresorbable and biocompatible phases of calcium and / or magnesium phosphates can be used to make bone implants for treatment of bone tissue defects. Keywords: tricalcium phosphate, calcium magnesium orthophosphate, magnesium pyrophosphate, whitlockite, octacalcium phosphate, hydroxyapatite, brushite, struvite, ceramics.
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7

Ding, Zhu, Ming Zhang, Bi Qin Dong, Wei Liu, and Han Lu. "Phosphate Bonding: A New Method for Using Large Volume of Fly Ash." Key Engineering Materials 539 (January 2013): 225–29. http://dx.doi.org/10.4028/www.scientific.net/kem.539.225.

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Magnesium phosphate cements (MPC) with larger volume of fly ash were studied in the present work. Dead burned magnesia, phosphates and fly ash were the components of MPC. The volume of fly ash in MPC was 70%, 75% and 80%, respectively. Three phosphates, monosodium phosphate (MSP), monopotassium phosphate (MPP) and monoammonium phosphate (MAP) were used. Compressive strength of the three MPC mortars with different fly ash content was determined. Results show that the compressive strength reduced with the proportion increase of fly ash, increased with the curing time. After cured 28 days in the lab air, the compressive strength of cement mortar can reach 14MPa, when the fly ash dosage was 80% by weight of cement. The reaction product is struvite of potassium (KMgPO4•6H2O) in potassium phosphate based MPC, and hydrated sodium phosphate (Na2HPO4•17H2O) in sodium phosphate based MPC. The results indicate that MPC has capacity to bond large volume of fly ash. A new way to utilize fly ash in a large scale can be realized by phosphate bonding.
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8

Driessens, F. C. M., M. G. Boltong, R. Wenz, and J. Meyer. "Calcium Phosphates as Fillers in Struvite Cements." Key Engineering Materials 284-286 (April 2005): 161–64. http://dx.doi.org/10.4028/www.scientific.net/kem.284-286.161.

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Struvite or magnesium ammonium phosphate MgNH4PO4 has been proposed as active component in setting surgical cements. The usual formulation is one in which the magnesium component in the powder is either magnesium hydrogen phosphate trihydrate or trimagnesium phosphate or a mixture of these two compounds. As the cement liquid a concentrated solution of diammonium phosphate is taken. To make the cement attractive as a bone substitute material a calcium phosphate filler is generally incorporated. Thus such materials are a type of pseudo calcium phosphate cements. This study was intended to find out which calcium phosphate and which magnesium compound are the most suitable. In the first series of experiments a mixture of 12 g Mg3(PO4)2 and 4 g MgHPO4.3H2O was used as the magnesium component in the powder. To that powder 30 g of either precipitated hydroxyapatite PHA or CaHPO4 or CaHPO4.H2O or b-TCP or a-TCP was added. The cement liquid was a 3.5 M solution of (NH4)2HPO4. At specific liquid/powder ratios L/P suitable setting times were obtained for the different formulations. However, the compressive strengths after immersion of the cements in 0.9% saline solution at 37°C varied over a large range. The best formulation was that with a-TCP which reached a compressive strength of 57 MPa after 18 h of immersion. In the second series of experiments 20 g of Mg3(PO4)2 was used as the magnesium component in the powder. Again 30 g of either of the above mentioned calcium phosphates was used as filler and again a 3.5 M solution of (NH4)2HPO4 was used as the cement liquid. At the appropriate L/P ratios the respective setting times were longer than in the first series of experiments but all five formulations appeared to result in good compressive strengths varying from 41 MPa for the formulation with b-TCP to 67 MPa for the formulation with PHA. In the third series of experiments 30 g a-TCP was taken as the calcium phosphate in the powder. As magnesium components mixtures of Mg3(PO4)2.8H2O and MgHPO4.3H2O and Mg3(PO4)2 were used. Again the cement liquid consisted of a 3.5 M solution of (NH4)2HPO4. The formulations with Mg3(PO4)2.8H2O had the shortest setting times and the lowest compressive strengths, whereas those with Mg3(PO4)2 had the longest setting times and the highest compressive strengths. Therefore, it is advantageous to use Mg3(PO4)2 as the magnesium component.
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9

Nabiyouni, Maryam, Yufu Ren, and Sarit B. Bhaduri. "Magnesium substitution in the structure of orthopedic nanoparticles: A comparison between amorphous magnesium phosphates, calcium magnesium phosphates, and hydroxyapatites." Materials Science and Engineering: C 52 (July 2015): 11–17. http://dx.doi.org/10.1016/j.msec.2015.03.032.

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10

Seel, F., K. P. Klos, D. Recktenwald, and J. Schuh. "Zur Frage der nicht-enzymatischen Bildung von kondensierten Phosphaten unter präbiotischen Bedingungen/ Non-Enzymatic Formation of Condensed Phosphates under Prebiotic Conditions." Zeitschrift für Naturforschung B 41, no. 7 (1986): 815–24. http://dx.doi.org/10.1515/znb-1986-0704.

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AbstractOne of the problems of chemical evolution on the primitive Earth is the question of the possibility of a non-enzymatic spontaneous condensation o f phosphoric acid and hydrogen phosphates to yield polyphosphoric acids and polyphosphates in aqueous system s, by means of which phosphorus might have entered into early metabolisms. The extra- or intra-cellular formation of magnesium diphosphate under geologically plausible hydrothermal conditions from either magnesium hydrogen phosphates or calcium phosphates in media has been demonstrated.
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