scholarly journals Microstructural analysis of three-dimensional canal network in the rabbit lumbar vertebral endplate

2014 ◽  
Vol 33 (2) ◽  
pp. 270-276 ◽  
Author(s):  
Tomonori Yamaguchi ◽  
Shota Goto ◽  
Yasuhiro Nishigaki ◽  
Alejandro A. Espinoza Orías ◽  
Won C. Bae ◽  
...  
Keyword(s):  
Microstructural Analysis ◽  
Three Dimensional ◽  
Vertebral Endplate ◽  
Canal Network

Monochromatic synchrotron radiation μCT reveals disuse-mediated canal network rarefaction in cortical bone of growing rat tibiae

2006 ◽  
Vol 100 (1) ◽  
pp. 274-280 ◽  
Author(s):  
Takeshi Matsumoto ◽  
Masayuki Yoshino ◽  
Takahisa Asano ◽  
Kentaro Uesugi ◽  
Masahiro Todoh ◽  
...  
Keyword(s):  
Bone Mineral Density ◽  
Synchrotron Radiation ◽  
Cortical Bone ◽  
Bone Mineral ◽  
Microstructural Analysis ◽  
Three Dimensional ◽  
Mineral Density ◽  
Sciatic Neurectomy ◽  
Canal Network ◽  
Monochromatic Synchrotron

The purpose of this study was to demonstrate the ability of computed microtomography based on monochromatic synchrotron radiation (SRμCT) in microstructural analysis of cortical bone. Tibial diaphyses of growing rats (14 wk, n = 8) undergoing unilateral sciatic neurectomy 8 wk before study were imaged with spatial volume resolution of 5.83 × 5.83 × 5.83 μm3 by SRμCT (20 keV) at the synchrotron radiation facility (SPring-8). Reconstructed image data were translated into local mineral densities by using a calibrated linear relationship between linear absorption coefficients and concentrations of homogeneous K2HPO4 solution. Pure bone three-dimensional images, produced by simple thresholding at a bone mineral density of 0.82 g/cm3, were analyzed for macro- and microscopic structural properties. In neurectomized hindlimbs, cortical canal network rarefaction as well as bone atrophy were found. The former was characterized by 30% smaller porosity, 11% smaller canal density in transverse section, and 38% smaller canal connectivity density than those in contralateral bone. On the other hand, no difference was found in bone mineral density between neurectomized and intact hindlimbs (1.37 vs. 1.36 g/cm3). In conclusion, SRμCT is a promising method for the three-dimensional analysis of cortical microstructure and the degree of mineralization in small animals.

scholarly journals High-resolution three-dimensional microstructural analysis of cortex of the superolateral femoral neck in men reveals critical subregion

Bone Reports ◽  
2021 ◽  
Vol 14 ◽  
pp. 100964
Author(s):  
Ana Cirovic ◽  
Aleksandar Cirovic ◽  
Vladimir Zivkovic ◽  
Slobodan Nikolic ◽  
Petar Milovanovic ◽  
...  
Keyword(s):  
High Resolution ◽  
Femoral Neck ◽  
Microstructural Analysis ◽  
Three Dimensional

scholarly journals Mechanochemical synthesis of bismuth ferrite

2013 ◽  
Vol 49 (1) ◽  
pp. 27-31 ◽  
Author(s):  
Z. Marinkovic-Stanojevica ◽  
L. Mancic ◽  
T. Sreckovic ◽  
B. Stojanovic
Keyword(s):  
Milling Time ◽  
Structure Refinement ◽  
Bismuth Ferrite ◽  
Renewable Energy Sources ◽  
Microstructural Analysis ◽  
Three Dimensional ◽  
Conventional Solid State Reaction ◽  
Refinement Method ◽  
Crystallite Sizes ◽  
Size And Morphology

A powder mixture of Bi2O3 and Fe2O3 was mechanically treated in a planetary ball mill in an air from 30 to 720 minutes. It was shown that the mechanochemical formation of BiFeO3 (BFO) phase was initiated after 60 min and its amount increased gradually with increasing milling time. A detailed XRPD structural analysis is realized by Rietveld?s structure refinement method. The resulting lattice parameters, relative phase abundances, crystallite sizes and crystal lattice microstrains were determined as a function of milling time. Microstructural analysis showed a little difference in morphology of obtained powders. The primary particles, irregular in shape and smaller than 400 nm are observed clearly, although they have assembled together to form agglomerates with varying size and morphology. Dense BFO ceramics were prepared by conventional solid-state reaction at the temperature of 810?C for 1h followed immediately by quenching process. [Projekat Ministarstva nauke Republike Srbije, br. III45007: Zero- to Three-Dimensional Nanostructures for Application in Electronics and Renewable Energy Sources: Synthesis, Characterization and Processing

scholarly journals Electrostatic-Interaction-Driven Assembly of Binary Hybrids towards Fire-Safe Epoxy Resin Nanocomposites

Polymers ◽  
2019 ◽  
Vol 11 (2) ◽  
pp. 229 ◽  
Author(s):  
Lu Liu ◽  
Wei Wang ◽  
Yongqian Shi ◽  
Libi Fu ◽  
Lulu Xu ◽  
...  
Keyword(s):  
Heat Release ◽  
High Performance ◽  
Flame Retardants ◽  
Microstructural Analysis ◽  
Three Dimensional ◽  
Morphological Characterization ◽  
Interfacial Interaction ◽  
Graphitization Degree ◽  
Cone Calorimeter Test ◽  
Ep Matrix

Manganese dioxide (MnO2), as a promising green material, has recently attracted considerable attention of researchers from various fields. In this work, a facile method was introduced to prepare binary hybrids by fabricating three-dimensional (3D) zinc hydroxystannate (ZHS) cubes on two-dimensional (2D) MnO2 nanosheets towards excellent flame retardancy and toxic effluent elimination of epoxy (EP) resin. Microstructural analysis confirmed that the morphologies and structures of MnO2@ZHS binary hybrids were well characterized, implying the successful synthesis. Additionally, the morphological characterization indicated that MnO2@ZHS binary hybrids could achieve satisfactory interfacial interaction with the EP matrix and be well dispersed in nanocomposites. Cone calorimeter test suggested that MnO2@ZHS binary hybrids effectively suppressed the peak of heat release rate and total heat release of EP nanocomposites, performing better than MnO2 or ZHS alone. Condensed-phase analysis revealed that MnO2@ZHS binary hybrids could promote the char density and graphitization degree of char residues and thereby successfully retard the permeation of oxygen and flammable gases. Moreover, through the analysis of gas phase, it can be concluded that MnO2@ZHS binary hybrids could efficiently suppress the production of toxic gases during the degradation of EP nanocomposites. This work implies that the construction of 2D/3D binary hybrids with an interfacial interaction is an effective way to fabricate high-performance flame retardants for EP.

Digital probes for three-dimensional microstructural analysis

1991 ◽  
Vol 4 (4) ◽  
pp. 255-261 ◽  
Author(s):  
H. Q. Zhao ◽  
M. A. Browne ◽  
C. V. Howard
Keyword(s):  
Microstructural Analysis ◽  
Three Dimensional

An assessment of thermosetting infiltrate in powder-based composites made by additive manufacturing

2018 ◽  
Vol 53 (7) ◽  
pp. 873-882 ◽  
Author(s):  
Breno Ferreira Lizardo ◽  
Luciano Machado Gomes Vieira ◽  
Juan Carlos Campos Rubio ◽  
Tulio Hallak Panzera ◽  
João Paulo Davim
Keyword(s):  
Mechanical Properties ◽  
Additive Manufacturing ◽  
Porous Structure ◽  
Epoxy Polymer ◽  
Complex Geometry ◽  
Microstructural Analysis ◽  
Three Dimensional ◽  
Three Dimensional Printing ◽  
Small Series ◽  
Dimensional Printing

Rapid prototyping for material deposition or additive manufacturing has been widely used for short time production of parts with complex geometry in small series. The three-dimensional printing process needs post-processing to improve the strength, stiffness and/or surface finish of the parts. Printed parts in pristine condition are generally very brittle with a porous structure, so infiltrates have been introduced to improve their mechanical and physical characteristics. This work investigates the effect of two infiltrates, epoxy polymer and cyanoacrylate, under a vacuum pressure system on the mechanical properties of powder-based composites made by three-dimensional printing. Samples printed under pristine and infiltrated conditions were tested under tensile, flexural, compressive and impact loadings. The infiltrated samples achieved superior mechanical properties, especially when the epoxy polymer was applied via a vacuum system. The microstructural analysis showed that the infiltrates were not able to penetrate the entire sample, revealing a porous structure in the centre, mainly when the cyanoacrylate was used. The epoxy polymer infiltrate was able to substantially increase the mechanical performance of three-dimensional samples, being a promising material when higher structural requirements are required.

Three-dimensional microstructural analysis of Mg–Al–Zn alloys by synchrotron-radiation-based microtomography

2008 ◽  
Vol 58 (6) ◽  
pp. 453-456 ◽  
Author(s):  
F. Witte ◽  
J. Fischer ◽  
F. Beckmann ◽  
M. Störmer ◽  
N. Hort
Keyword(s):  
Synchrotron Radiation ◽  
Microstructural Analysis ◽  
Three Dimensional ◽  
Zn Alloys

scholarly journals A Microstructural Analysis of 2D Halide Perovskites: Stability and Functionality

2021 ◽  
Vol 3 ◽  
Author(s):  
Susmita Bhattacharya ◽  
Goutam Kumar Chandra ◽  
P. Predeep
Keyword(s):  
Solar Cell ◽  
Microstructural Analysis ◽  
Perovskite Solar Cells ◽  
Three Dimensional ◽  
Two Dimensional ◽  
Photoelectric Conversion ◽  
Flexible Architecture ◽  
Halide Perovskites ◽  
Superlattice Structures ◽  
Low Dimensional

Recent observations have demonstrated that the photoelectric conversion properties of perovskite materials are intimately related to the presence of superlattice structures and other unusual nanoscale features in them. The low-dimensional or mixed-dimensional halide perovskite families are found to be more efficient materials for device application than three-dimensional halide perovskites. The emergence of perovskite solar cells has revolutionized the solar cell industry because of their flexible architecture and rapidly increased efficiency. Tuning the dielectric constant and charge separation are the main objectives in designing a photovoltaic device that can be explored using the two-dimensional perovskite family. Thus, revisiting the fundamental properties of perovskite crystals could reveal further possibilities for recognizing these improvements toward device functionality. In this context, this review discusses the material properties of two-dimensional halide perovskites and related optoelectronic devices, aiming particularly for solar cell applications.

Three-dimensional microstructural analysis of human trabecular bone in relation to its mechanical properties

Bone ◽  
1999 ◽  
Vol 25 (4) ◽  
pp. 487-491 ◽  
Author(s):  
T. Uchiyama ◽  
T. Tanizawa ◽  
H. Muramatsu ◽  
N. Endo ◽  
H.E. Takahashi ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Trabecular Bone ◽  
Microstructural Analysis ◽  
Three Dimensional ◽  
Human Trabecular Bone
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