Materials Literature
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390 Objectives 11C-ABP688 and 18F-FPEB are promising PET tracers for quantifying metabotropic glutamate receptor subtype5 (mGluR5) for greater understanding of CNS disorders and drug development. This study is to compare two radioligands for reproducibility and regional BPND. Methods Healthy subjects were each studied…
Electron energy loss spectra of inner-shell excitations of 2p electrons of argon are measured at an incident electron energy of 2500 eV and scattering angles of 0° and 4°. The dipole-forbidden transitions of 2p −1 3/2 4p and 2p −1 3/2 5p are observed in the measured spectra and assigned based on the calculations of th…
In this paper, it is tried to introduce, implement and control the voltage of one of the most important fuel cells, i.e. PEMFC, during load variations. Output voltage of fuel cell should be constant during load variation. To achieve this goal, a controller should be designed. Here, the PID controller is used which its…
This paper presents the performance of a 375W axial-flux generator with a parallel-teeth stator core. One of the main set-backs in AFPM machines is the manufacture of stator steel cores. This can be solved by adopting a yokeless parallel-teeth stator. This stator structure is discussed and its performance is compared…
We have developed a 500-kV, 10-mA photocathode DC gun for energy recovery linac (ERL) light sources. A segmented ceramic insulator with guard rings is employed to improve robustness at high voltage operation, because this structure can prevent field emission electrons from directly striking the ceramic surface. We hav…
With regards to their high effectiveness in transformation of input energy of chemical bonds into the output electric and heat energy and environmental friendly nature, fuel cells have been addressed with great potential prospective. There are various installations of large stationary sources in all over the globe, wi…
The electromechanical properties of thin tangentially polarized, stripe-electroded piezoceramic elements are considered. Theoretical analysis is made based on a piecewise linear approximation of the actual nonuniform electric field in the volume of the stripe-electroded cylinder design. Analytical expressions are deri…
The electrochemical oxidation of triphenylphosphine (Ph3P) was investigated by means of cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS) on glassy-carbon (GC), gold (Au) and multi-walled carbon nanotubes (MWCNT) in acetonitrile (ACN), dichloromethane (DCM), and cyclohexanone (CHN). The electron…
This study deals with the effect of the isomorphic substitution on the sorption of two Li atoms on montmorillonite using density functional theory (DFT). The isomorphic substitution is carried out by modifying the atomic composition of the upper tetrahedral layer of the montmorillonite by replacing one Si atom with on…
Some properties and applications in the aerospace industry of high-temperature whiskers (SiC, Si 3 N 4 , AlN) and fibers (SiO 2 , A1 2 O 3 ) are described
TiN, TiCN and TiAlN coatings were deposited on K20 cemented carbide tools by arc ion plating method. The microstructure and mechanical properties of the coatings were investigated using an X-ray diffractometer, a scanning electron microscope and micromechanic probes. The cutting performances of the coated mills and dr…
Cu 2 ZnSnS 4 (CZTS) thin films were prepared by a sol–gel sulfurization method. Sulfurization was carried out in H 2 S of various concentrations and the properties of the films were investigated. The CZTS thin films sulfurized at 500 °C for 1 h in 0.5 and 3% H 2 S atmospheres had large grains compared with the film su…
Abstract IN718 is a standard nickel-base alloy for high temperature usage, e.g., as forged gas turbine disks. At elevated temperatures IN718 is prone to cracking by dynamic embrittlement. Dynamic embrittlement is caused by oxygen diffusion along the grain boundaries, resulting in a time-dependent intergranular decohes…
An automated classification based on S-transform as feature extraction tool and Artificial Neural Network as algorithm classifier is presented. The signals generated according to mathematical models have been used to obtain experimental results in two stages, first, with a data set with only simple disturbances and, l…
This paper presents high feasibility of homo/heterogeneous bonding of Cu, SiO2, and polyimide by means of the vapor-assisted surface activation method at 150°C at atmospheric pressure. Such a bonding technology is expected to have high practical value when three-dimensional integration of thin and flexible bumpless st…
The reactivity and functionality of heme proteins are to a significant extent determined by the conformation of their functional heme groups and by the interaction of axial ligands with their protein environment. This review focuses on experimental methods and theoretical concepts for elucidating symmetry lowering per…
In this work, the authors examine the acoustic response generated by the coencapsulation of phospholipid shelled microbubbles within the aqueous core of polymer microcapsules and its feasibility as an ultrasound contrast agent. The addition of the polymer shell provides the added benefit of approximately doubling the…
Constructs intended for bone tissue engineering are influenced by the initial cell seeding procedure. The seeding method should be rapid, convenient, improve cell spatial distribution, and have no negative effects on cellular viability and differentiation. This study aimed to compare the effect of short-run seeding me…
In this work, the authors studied the time response of solid-state nanopores to the applied potentials and the corresponding capacitances. They primarily examined the effect of the doping of the silicon substrates as well as the addition of dielectrics above and below the device membrane. For simple silicon nitride me…
Carboxymethyl cellulose (CMC) is the most widely used co-binder and rheology modifier in paper coating. This work presents an investigation on the effects of CMC on coating structure development by measuring viscosity of the coating colors and by characterizing properties of the dried coatings. The results showed that…