Calcium phosphate solid phase induction by dioleoylphosphatidate liposomes

1986 ◽  
Vol 111 (1) ◽  
pp. 152-159 ◽  
Author(s):  
James J Vogel
Keyword(s):  
Calcium Phosphate ◽  
Solid Phase

Thermodynamics Analysis of Hot Metal Dephosphorization Flux Reaction Process

2011 ◽  
Vol 402 ◽  
pp. 354-357
Author(s):  
Hui Ding ◽  
Yan Jin ◽  
Zhi Bing Tian ◽  
Dan Jiang Wu
Keyword(s):  
Calcium Phosphate ◽  
Solid Phase ◽  
Equilibrium Temperature ◽  
Quality Data ◽  
Hot Metal ◽  
Phosphate Capacity ◽  
Different Temperatures ◽  
Factsage Software ◽  
The Right ◽  
Calculation Software

In this paper, CaO-Fe2O3-CaCl2and CaO-Fe3O4-CaCl2system dephosphorizer depho- -sphorization of the thermodynamics of the use of FactSage thermodynamic calculation software Equilib module of hot metal dephosphorization flux and the balance between the response calculated, to find the right dephosphorizer dephosphorization ratio and the conditions for optimal phosphorus removal. First of all, by the beginning of slag and the final calculated optical basicity slag and phosphate capacity, calculated on the balance FactSage software phosphorus content mapping, and comparative analysis. Followed by software at different temperatures to calculate the iron liquid, liquid slag, slag liquid solid phase of calcium phosphate and calcium phosphate and quality data on the thermodynamic equilibrium temperature mapping analysis..

Intracellular mineralization of Bacterionema matruchotii

1981 ◽  
Vol 27 (3) ◽  
pp. 267-270 ◽  
Author(s):  
S. W. Ooi ◽  
A. C. Smillie ◽  
T. B. Kardos ◽  
M. G. Shepherd
Keyword(s):  
Crystal Growth ◽  
Calcium Phosphate ◽  
Intracellular Calcium ◽  
Electron Micrographs ◽  
Solid Phase ◽  
Calcium Hydroxyapatite ◽  
Mineral Formation ◽  
Phosphate Mineral ◽  
Calcium And Phosphorus ◽  
Phosphorus Levels

Intracellular calcium phosphate mineral formation in Bacterionema matruchotii has been examined relative to two established points: the product of calcium and phosphorus levels at which spontaneous precipitation occurs (Ca × P), 50 (mg %)2, and the product at which calcium hydroxyapatite itself induces crystal growth, 35 (mg %)2. The extent of intracellular mineralization in the defined calcifying medium was determined analytically after washing the cells. Electron micrographs of B. matruchotii cells revealed needlelike crystals of mineral, typical of calcium hydroxyapatite. Bacterionema matruchotii was found to be an efficient nucleator and can bring about the formation of solid phase at a Ca × P product as low as 35 (mg %)2.

Three-dimensional fast-degrading polymer films for delivery of calcium phosphate/DNA co-precipitates in solid-phase transfection

2009 ◽  
Vol 19 (37) ◽  
pp. 6733 ◽  
Author(s):  
Yun-Qiu Li ◽  
Feng Li ◽  
Xian-Zheng Zhang ◽  
Si-Xue Cheng ◽  
Ren-Xi Zhuo
Keyword(s):  
Calcium Phosphate ◽  
Polymer Films ◽  
Solid Phase ◽  
Three Dimensional

Preparation and Characterization of Silk Fibroin/Calcium Phosphate Composite

2011 ◽  
Vol 332-334 ◽  
pp. 1655-1658
Author(s):  
Biao Wang ◽  
Rui Juan Xie ◽  
Yang Yang Huang
Keyword(s):  
Compressive Strength ◽  
Calcium Phosphate ◽  
Silk Fibroin ◽  
Solid Phase ◽  
Setting Time ◽  
Testing Machine ◽  
X Ray Diffraction ◽  
Acicular Crystal ◽  
Setting Times

In this paper, calcium phosphate cement (CPC) was prepared with tetracalcium phosphate (TTCP)/dicalcium phosphate anhydrous (DCPA) system as solid phase and phosphate buffered solution (PBS) as liquid phase, then silk fibroin (SF) was added into CPC to form silk fibroin/calcium phosphate composite. To study the effect of SF on the properties of composite, different mass fraction of SF was added into the composite. The surface morphology was observed by Scanning Electron Microscope. The setting time was investigated by ISO Cement Standard Consistency Instrument. The structure of the composite was studied by X-ray diffraction and infrared spectroscopy. Mechanical properties of samples were tested by Instron Universal Testing Machine. The results showed that the particles of SF could be seen obviously in the surface of all composite, and acicular crystal of hydroxyapatite (HA) was formed in the hardening body of both the composite and the pure CPC. The acicular crystal of HA derived from composite with SF appeared to be thinner. The setting times of the composites were all between 9 to 15min. Compared to pure CPC, the compressive strength and work-of-compressive of composites were all improved. The compressive strength of the composite with 1% SF increased obviously.

Thermal Treatment of Non-Crystalline Calcium Phosphate

1967 ◽  
Vol 25 ◽  
pp. 330-331
Author(s):  
R. J. Gerdes ◽  
J. C. Weber
Keyword(s):  
Electron Microscope ◽  
Calcium Phosphate ◽  
Amorphous Materials ◽  
Solid Phase ◽  
Calcium Phosphates ◽  
Amorphous Material ◽  
Carbon Film ◽  
Molar Ratio ◽  
Alkaline Solutions ◽  
Phosphate Salts

The first solid phase of calcium phosphate salts which are prepared "by rapid precipitation from alkaline solutions gives an x-ray diffraction pattern characteristic of amorphous materials. Investigations by methods of electron microscopy show that the aperiodic nature of the atomic structure is reflected in the external morphology of these precipitates; the particles are spheroids with electron.translucent cores. The present study was undertaken to ascertain the influence of heat treatment in the electron microscope on these amorphous calcium phosphates.The calcium phosphate salt was prepared at 25°C by rapid mixing of alkaline calcium and phosphate solutions of sufficient concentrations to produce instantaneous precipitation. A Ca/P molar ratio of 1.5 indicates that the product obtained is a neutral tricalcium phosphate. The amorphous material was prepared for examination in the electron microscope by suspending the dry solid in distilled water or in benzene or trichlorethylene. A drop of one of these suspensions was evaporated on a carbon film which covered an electron microscope grid.

scholarly journals Concurrent occurrence of electrochemical dissolution/deposition of cobalt–calcium phosphate composite

RSC Advances ◽  
2021 ◽  
Vol 11 (45) ◽  
pp. 28342-28346
Author(s):  
Eunji Pyo ◽  
Keunyoung Lee ◽  
Gi-Tae Park ◽  
Se-Young Ha ◽  
Seonhong Lee ◽  
...  
Keyword(s):  
Calcium Phosphate ◽  
Solid Phase ◽  
Electrochemical Dissolution ◽  
Electrochemical Preparation ◽  
Phosphate Source

Solid phase of phosphate source (hydroxyapatite) is utilized for the electrochemical preparation of cobalt–calcium phosphate composite (CCPC) film.

scholarly journals Control of the Injectability of Calcium Carbonate-Calcium Phosphate Mixed Cements for Bone Reconstruction

2008 ◽  
Vol 396-398 ◽  
pp. 225-228 ◽  
Author(s):  
Solene Tadier ◽  
Nadine Le Bolay ◽  
S. Girod Fullana ◽  
Christian Rey ◽  
Christèle Combes
Keyword(s):  
Calcium Carbonate ◽  
Calcium Phosphate ◽  
Reaction Rate ◽  
Solid Phase ◽  
Setting Time ◽  
Dicalcium Phosphate Dihydrate ◽  
Positive Effects ◽  
Phosphate Dihydrate ◽  
Morphology Modification ◽  
Bone Filling

The purpose of this study was to improve injectability and cohesiveness of original calcium carbonate-calcium phosphate mixed (CaCO3-CaP) self-setting paste for bone filling and repair. With this aim in view dry co-grinding was implemented on the solid phase (vaterite and dicalcium phosphate dihydrate) of this cement. A protocol designed to quantify paste injectability has been established and pointed out the synergistic positive effects of solid phase co-grinding treatment on injectability, cohesiveness and setting time of the paste. The improvement of these properties are related to close and homogeneous association of reactive powders and to the decrease of specific surface area favoring the powders hydration process enhancing setting reaction rate. In addition, the particle size decrease and morphology modification improved flowability of the paste which results in a low and constant (320 g) force level to extrude the paste.

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