X-ray diffraction radial distribution function studies on bone mineral and synthetic calcium phosphates

1984 ◽  
Vol 19 (3) ◽  
pp. 723-736 ◽  
Author(s):  
M. D. Grynpas ◽  
L. C. Bonar ◽  
Melvin J. Glimcher
Keyword(s):  
Distribution Function ◽  
Radial Distribution Function ◽  
Bone Mineral ◽  
Radial Distribution ◽  
Calcium Phosphates ◽  
X Ray Diffraction ◽  
X Ray

Organometallic Oligomer Resolved by Radial Distribution Function of X-ray Diffraction Analysis

2010 ◽  
Vol 114 (7) ◽  
pp. 2359-2364 ◽  
Author(s):  
Roberto Matassa ◽  
Marilena Carbone ◽  
Ilaria Fratoddi ◽  
Ruggero Caminiti
Keyword(s):  
Distribution Function ◽  
Diffraction Analysis ◽  
Radial Distribution Function ◽  
Radial Distribution ◽  
X Ray Diffraction ◽  
X Ray

X-ray diffraction curves for a system of parallel cylinders with liquid-like order: A model for the diffraction of crazed polymers

1981 ◽  
Vol 14 (6) ◽  
pp. 417-420 ◽  
Author(s):  
E. Paredes ◽  
P. Colonomos
Keyword(s):  
Monte Carlo ◽  
Distribution Function ◽  
Radial Distribution Function ◽  
Internal Structure ◽  
Two Dimensional ◽  
X Ray Diffraction ◽  
Monte Carlo Data ◽  
X Ray ◽  
Fibril Diameter ◽  
Good Agreement

As a model for the internal structure of polymer crazes, a system of parallel cylinders with liquid-like order is proposed. X-ray diffraction curves were calculated for such a system with Monte Carlo data for the radial distribution function of the two-dimensional hard-disk fluid at different packing densities. A comparison is made between the present calculations and experimental results of crazed polycarbonate showing a very good agreement. A way of evaluating the average craze fibril diameter with the calculations is also discussed.

Mapping the density and mineral phase of calcium in bone at the interface with biomaterials using scanning x-ray microscopy

1994 ◽  
Vol 52 ◽  
pp. 44-45
Author(s):  
C. J. Buckley ◽  
S. Downes ◽  
N. Khaleque ◽  
S. J. Bellamy ◽  
X. Zhang
Keyword(s):  
Bone Mineral ◽  
Calcium Phosphates ◽  
X Ray Diffraction ◽  
Mineral Phase ◽  
X Ray ◽  
Prosthetic Implants ◽  
Chemical Phase ◽  
Infra Red ◽  
Rapid Healing ◽  
Prosthetic Implant

Orthopaedic surgery often involves the insertion of a prosthetic implant. For successful and rapid healing, it is important for the prosthesis to make a close and well integrated bond with the bone tissue. To assist this integration, a number of “biomaterials” are on trial as components in the prosthetic implants. Much work is in progress to determine the phase, composition and density of bone mineral at the bone/biomaterial interface. It is expected that the results of this work can be used to develop synthetic calcium phosphates which can be incorporated in prosthetic implants. The composition of bone and biomaterials has been investigated using techniques such as x-ray diffraction, Infra-red, NMR and EXAFS on homogenized samples. However, these studies do not determine the spatial distribution of the bone mineral, its density, localized mineral phase or cellular integration with biomaterials. Electron microscopy with electron probe microanalysis, light and Infra-red microscopy can indicate the presence of mineral in relation to the tissue morphology, but do not give a spatial measure of the density or chemical phase of the mineral at the sub micron level.

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