Determination of bone mineral volume fraction using impedance analysis and Bruggeman model

Ciuchi, Ioana Veronica; Olariu, Cristina Stefania; Mitoşeriu, Liliana

doi:10.1016/j.mseb.2013.04.001

Cited by 19 publications

(6 citation statements)

References 22 publications

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“… values of CP3, CP4 and CP8 are around 16.5, 11.5 and 10.5, respectively. While the graphs of the relative permittivity vs. frequency of CP1 and CP2 are very similar to the reported plot belonging to the dry tibia [19], the frequency dependence of the relative permittivity of CP4 and CP8 is so close to the femur [20]. Moreover, the plots of the relative permittivity as a function of frequency of CP3, CP4 and CP8 are in a good harmony with human cortical bone having different hydration values [21].…”

Section: Resultssupporting

confidence: 73%

Dielectric Properties of Calcium Phosphate Ceramics

Kayğili

Keser

Ateş

et al. 2016

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Calcium phosphate ceramics with various Ca/P ratios of 1, 2, 3, 4 and 8 were synthesized via sol-gel route. The effects of Ca/P molar ratio on structural, morphological and dielectric properties were investigated in detail using X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, scanning electron microscopy and dielectric measurements. The Ca/P molar ratio significantly affects the crystal structure and phase composition. The crystallite size, lattice parameters and volume of the unit cell were remarkably affected by the change in the Ca/P molar ratio. The microstructure is changed with increasing the Ca/P molar ratio. The relative permittivity and alternating current conductivity gradually decrease for the samples having the Ca/P ratios higher than 2. The dielectric loss decreases gradually with the increase of the molar ratio of Ca/P.

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Section: Resultssupporting

confidence: 73%

Dielectric Properties of Calcium Phosphate Ceramics

Kayğili

Keser

Ateş

et al. 2016

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“…The ! ' of mortar improves significantly with the addition of CB and different content of WIP, which is aligned with the Boltzmann effective medium theory (Eq.4) [27][28][29][30]. However, the tan!…”

Section: Materials Library Datasupporting

confidence: 83%

Optimization with a Genetic Algorithm for Multilayer Electromagnetic Wave Absorption Cement Mortar Filled with Expended Perlite

Xie

et al. 2023

J. Mater. Sci. Technol. Res.

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Due to the complexity of the design of multilayer electromagnetic (EM) wave absorbing materials, it is difficult to establish the relationship between material parameters (type and filling ratios) and EM properties using traditional trial and error methods. Based on the measured EM parameters within a few materials and Boltzmann mixing theory, a database of EM parameters was thereafter built up. In this study, the genetic algorithm (GA) was used to design the multilayer wave-absorbing cement mortar. In order to verify this method, a multilayer mortar was fabricated and measured. The simulated and measured results are well consistent, which convincingly verifies computer-aided design. In addition, the optimized result expresses that the first layer as a matching layer guides EM waves into the interior of the material, while the other layers as absorption layers attenuate EM waves. The multilayer material may not meet the impedance gradient principle but still exhibits better EM wave absorption performance. The reflection loss (RL) of all optimized three layer sample is below –6.89 dB in the full frequency band and the minimum RL is –26.21 dB. This composite absorbing material and the GA method provide more design ideas for the design of future cement-based wave-absorbing materials and save a lot of time and material cost.

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confidence: 99%

“…The major minerals that form the inorganic matrix of bone are calcium and phosphorus [2]. The extent of bone mineralization affects bone strength [2] and poor mineralization leads to increased risk of fractures [3]. Skeletal abnormalities and architectural deterioration of bone tissue are common under hot climatic conditions because a high environmental temperature leads to more excretion of minerals like calcium, iron, zinc and lower retention rates of minerals like calcium, phosphorus, sodium, manganese, copper and zinc resulting in decreased bone strength of broilers [4][5][6][7].…”

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confidence: 99%