Etude des performances thermiques et mécaniques de matériaux à matrice cimentaire renforcés par des fibres de bois de palmier
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Parametric Study for Nitrogen Separation from Air by Pressure Swing Adsorption Using Carbon Molecular Sieve
The separation of air by carbon molecular sieve (CMS) adsorption was studied in this work over a range of adsorption pressure of (2–8) bar. Breakthrough curves showed no significant effect of the pressure on product nitrogen purity and adsorbent capacity above 4 bar. Maximum purity of about 98% is observed for time up…
Plane wave scattering from a plasmonic nanowire array spacer-separated from a plasmonic film
In this paper, we present a theoretical analysis of the electromagnetic response of a plasmonic nanowire–spacer–plasmonic film system. The analytical solution presented in this paper is a full-wave solution, which is used to compute the fields scattered by the plasmonic nanostructure system on illumination by a plane…
Demonstration of Uninvolvement of Ions for Double Layer Capacitance by Use of Latex Suspensions
Abstract Water molecules in aqueous solutions were demonstrated to participate in formation of electric double layer capacitance, as partly agrees with the Stern–Gouy–Chapman theory, which is quite different from current fabrication techniques of industrial double layer capacitors. This conclusion was supported firstl…
Deformation of a Two-Dimensional, Shear Deformable Cantilever Beam Using Gradient Elasticity and Finite Differences
In the paper it has been studied the deformation of a cantilever beam using gradient elasticity and the finite difference method. The basic equilibrium equations are derived for an infinitesimal area for linear and gradient elasticity. Higher order expressions for the strain are considered, and from the differential e…
Changes in the structure of materials in brazing niobium with sapphire using a glass–ceramic solder
The changes in the structure of joints between sapphire and niobium produced by high-temperature brazing using a CaO–Al2O3 brazing alloy are investigated. The effect of temperature on the recrystallization processes in niobium and its alloys with zirconium on the formation of the second phase in the CaO–Al2O3 system a…
An all-nanocrystal transistor emerges from solution
The recipe for making the device paves the way for using the tunable materials as ingredients in flexible electronics.
Pulp Treatment of Triple Tooth in Primary Dentition: Two Case Reports
유치열에서 드물게 관찰되는 삼중치는 세 치아의 비정상적인 융합으로 나타난다. 몇몇 문헌들에서 이중치에 대해 보고하고 있지만, 삼중치에 대한 보고는 매우 드물다. 이러한 다중치는 유치열에서 더 흔하게 관찰되며, 몇 가지 임상적 문제점을 나타낸다. 심미적인 문제 뿐만 아니라 치아 우식증 및 파절에 취약함, 영구 치배의 결손, 교정적, 치주적 문제를 야기할 수 있으며, 복잡한 치아 구조로 인해 치수 치료를 어렵게 한다.첫 번째 증례는 만 1세 7개월 남아의 상악 유전치부에 나타난 삼중치로, 깊은 우식으로 치수 치료가 필요할 것으로 예상되었고, Mineral Trioxid…
Cilt: 3, No: 2, 2016
Electron paramagnetic resonance (EPR) spectroscopy was used to determine the gamma radiation damages in Lamotrigine and Flurbiprofen.The free radicals produced in the samples were interpreted in terms of some type of alkyl and amine radical fragments. The g values and hyperfine structure constants of the radicals were…
Fabrication of Stable Water/Oil Separation Filter Using Effect of Surface Wettability
The superhydrophobic and superoleophobic meshes surfaces have been used in various applications such as self-cleaning, anti-icing, gas exchange, oil-water separation, sound-wave penetrable anti-wetting structures, etc. In particular, there are many studies for oil-water separation with environmental issues. Because of…
Size and Dispersion Characteristics of Silver Nanoparticles Prepared Using Liquid Phase Reduction Method
Abstract This work investigates the size and dispersion characteristics of silver nanoparticles synthesized by a liquidphase reduction method using PAA. The experimental variables were the molecular weight and doses of the PAA,reducing agent, dispersant, and organic solvent (ethanol-acetone). UV-visible spectrophotome…
Characterization of the Dynamic Properties of Natural Rubbers Coagulated Using Different Methods
천연고무 라텍스를 아세트산을 사용한 응고(A-NR), 자연 응고(N-NR) 및 미생물을 사용한 응고(M-NR) 등 다른 방법들로 응고하였고, 이들의 가교도, 가교특성, 동적특성 및 열축적 특성 등을 조사하였다. 결과에 따르면 MNR의 경우 가장 높은 가교도와 가장 빠른 경화속도를 나타냈으며, A-NR은 정 반대인 가장 낮은 가교도와 가장 느린 경화속도를 나타내었다. 이들 고무의 동적특성은 rubber process analyzer(RPA), dynamic mechanical analyzer(DMA) 및 압축 열축적 분석방법 등을 이용하여 측정하였다. 동적특성은 고무…
X-ray fluorescence determination of the surface density of thin chromium and iron films using reference samples of elements with close atomic numbers
In X-ray fluorescence determinations of the surface density of thin chromium and iron films, we studied the possibility of using an approach based on the application of reference samples of elements with close atomic numbers. It was shown that the proposed diagnostic approach ensures the determination of the surface d…
Effect of Inhibitor Particles on Normal Grain Growth before Secondary Recrystallization of Grain-Oriented Electrical Steels
The effect of inhibitor particles on normal grain growth is investigated. Migration of quadruple junction points, instead of entire boundary area, should be dominant during grain growth process according to experimental observations of Fe–3%Si alloys and corresponding regression calculations. However, the evolution of…
Ultrasound-Assisted Blends of Poly(lactic acid) and Poly(1,4-Cyclohexylene Dimethylene 1,4-Cyclohexane Dicarboxylate)
Poly(lactic acid)(PLA)와 poly(1,4-cyclohexylene dimethylene 1,4-cyclohexane dicarboxylate)(PCCD)의 블렌드에 초음파가 미치는 영향을 조사하였다. 초음파 가진 장치가 장착된 용융 혼련기를 이용하여 PLA/PCCD(50/50) (PCCD50) 블렌드를 준비하였고 물성들을 분석하였다. 초음파를 가진한 블렌드의 물성은 초음파 가진 시간에 매우 의존적이었는데 놀랍게도 1분간 초음파를 가진한 PCCD50의 충격강도는 단순 블렌드에 비해 3배 이상의 값을 보였다. 이 같은 증가는 PLA와 PCCD상간의 더…
TISSUE EXPANDER – A REVIEW
Aim:
Green Synthesis and Characterization of Gold Nanoparticles from Erythrina Variegate Plant Extract
To develop a reliable, eco-friendly and easy process for the synthesis of gold nanoparticles using leave extracts of medicinal plant “Erythrina Variegate”. The use of plant material not only makes the process eco-friendly but also the abundance makes it more economical. In the present research program, cost effective…
Effects of Mixing Ratio of Silicon Carbide Particles on the Etch Characteristics of Reaction-Bonded Silicon Carbide
We prepared a number of reaction-bonded silicon carbides (RBSCs) made from various mixing ratios of raw SiC particles, and investigated their microstructure and etch characteristics by Reactive Ion Etch (RIE). Increasing the amount of 9.5 m-SiC particles results in a microstructure with relatively coarser Si regions.…
EFFECT OF EUROPIUM CONCENTRATION ON THE PHYSICAL PROPERTIES OF NI-ZN FERRITE SUBSTITUTED BY MN2+ ION.
The effect of the substitution by europium ions on the magnetic and electrical properties was studied for the ferrite samples Mn0.5 Ni0.1Zn0.4EuxFe2-xO4, (0 ? x ? 0.15). The samples were prepared using
Multiscale modelling of the structural integrity of composite materials
The papers published in this issue of Philosophical Transactions of the Royal Society A are based on presentations made at a Discussion Meeting sponsored by The Hooke Committee of the Royal Society, named after Robert Hooke: ‘Ut Tensio sic vis’. After having examined silk fibres and fabrics,