Showing 1-26 of 26 results for "288497"
Ahmad Nazrul Rosli et al.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 79(5), 1251-1255 (2011-05-17)
We have calculated the vibrational frequencies of clusters of atoms from the first principles by using the density-functional theory in the local density approximation (LDA). We are also able to calculate the electronic binding energy for all of the clusters...
Amel Amirouche-Korichi et al.
Dental materials : official publication of the Academy of Dental Materials, 25(11), 1411-1418 (2009-08-18)
The degree of conversion (DC) and polymerization shrinkage of resin composites are closely related manifestations of the same process. Ideal dental composite would show an optimal degree of conversion and minimal polymerization shrinkage. These seem to be antagonistic goals, as...
Justin I Schwartz et al.
Acta odontologica Scandinavica, 62(2), 102-106 (2004-06-17)
Three UEDMA/TEGDMA (50:50 by weight) based dental composites were made, each with filler loadings of 53 vol.%. The three composites contained silane-treated filler particles with average particle diameters of 1.5, 3.0, or 10.0 microm. Twelve specimens per composite were mounted...
Shunyi Li et al.
Journal of physics. Condensed matter : an Institute of Physics journal, 23(33), 334202-334202 (2011-08-05)
The electrical properties of (Ba, Sr)TiO(3) (BST) thin films are studied using different combinations of Pt and tin-doped indium oxide (In(2)O(3):Sn, ITO) as electrode material. With Pt as bottom and top electrode the films show insulating behaviour with a low...
C Karthik et al.
Journal of nanoscience and nanotechnology, 7(3), 1006-1013 (2007-04-25)
Transparent glasses in the system (100 - x)Li2B4O7 - x(BaO-Bi2O3-Nb2O5) (x = 10, 20, and 30) were fabricated via the conventional melt-quenching technique. The amorphous and glassy characteristics of the as-quenched samples were established by the differential thermal analyses (DTA)...
Christopher T Dewberry et al.
Physical chemistry chemical physics : PCCP, 9(44), 5897-5901 (2007-11-09)
Hyperfine structures arising from the couplings of the nuclear spin angular momentum of (17)O (I = 5/2) with the end over end rotation of several metal-containing diatomic monoxides have been observed using a Fourier transform microwave spectrometer. The molecules have...
Lei Yang et al.
Nature communications, 2, 357-357 (2011-06-23)
The existing Ni-yttria-stabilized zirconia anodes in solid oxide fuel cells (SOFCs) perform poorly in carbon-containing fuels because of coking and deactivation at desired operating temperatures. Here we report a new anode with nanostructured barium oxide/nickel (BaO/Ni) interfaces for low-cost SOFCs...
Ozlem Gurbuz et al.
Gerodontology, 29(2), e710-e714 (2011-10-01)
The purpose of the study was to determine the effect of different forms and concentrations (2.5, 3, 4, 5% by volume) of glass fibres (chopped strand mat, continuous and woven) on fatigue resistance of acrylic denture base resin. The fatigue...
Paolo Raiteri et al.
Journal of physics. Condensed matter : an Institute of Physics journal, 23(33), 334213-334213 (2011-08-05)
A new reactive force field to describe proton diffusion within the solid oxide fuel cell material BaZrO(3) has been derived. Using a quantum mechanical potential energy surface, the parameters of an interatomic potential model to describe hydroxyl groups within both...
Garima Tripathi et al.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 66(4-5), 1307-1311 (2006-08-22)
Radiative properties of Er3+-doped tertiary bismuth glass has been analyzed by the Judd-Ofelt theory. NIR to visible upconversion in the Er3+-doped glass has been reported. The mechanism for the upconversion is explained on the basis of quadratic dependence on excitation...
R K Mishra et al.
Journal of hazardous materials, 161(2-3), 1450-1453 (2008-06-20)
The present manuscript describes the preparation, characterization and electrical behavior of sodium borosilicate glasses with varying concentrations of BaO, while maintaining the SiO(2):B(2)O(3):Na(2)O ratios constant for all the samples. The effect of BaO substitution on the ionic conductivity of glasses...
Donglin Han et al.
Advanced materials (Deerfield Beach, Fla.), 24(15), 2051-2053 (2012-03-21)
The existence of tetravalent dysprosium in perovskite-type oxide barium zirconate is confirmed in this work. This discovery will stimulate many researchers in diverse fields such as catalysts, solid state ionics, sensors, and fluorescent materials.
Haiping Xia et al.
Spectrochimica acta. Part A, Molecular and biomolecular spectroscopy, 70(1), 122-125 (2007-10-02)
Glasses with the composition of (99.5-chi)GeO2-chiWO(3)-0.5Bi2O3 (chi=3, 6, 9 mol%) and (99.5-psi)GeO2-psiBaO-0.5Bi2O3 (psi=3, 6, 9 mol%) were prepared. Their thermal, emission and absorption measurements were carried out. The near-infrared super broadband emission of the prepared samples peak around 1.3 microm...
Steven Y Huang et al.
AJR. American journal of roentgenology, 188(4), 960-964 (2007-03-23)
The purpose of this study was to compare the clinical and barium radiographic findings for 17 patients with large hiatal hernias and a floppy fundus with those for 61 patients with large hiatal hernias but no floppy fundus. Patients with...
Kumudu Mudiyanselage et al.
Langmuir : the ACS journal of surfaces and colloids, 25(18), 10820-10828 (2009-07-11)
Reactions of NO2, H2O, and CO2 with a thick (>20 monolayer equivalent (MLE)) BaO film supported on Pt(111) were studied with temperature programmed desorption (TPD) and X-ray photoelectron spectroscopy (XPS). NO2 reacts with a thick BaO layer to form surface...
Hao Kong et al.
The Analyst, 136(18), 3643-3648 (2011-07-29)
Thermochemiluminescence (TCL) of organic compounds or biological substances is an interesting phenomenon and has been applied to polymer analysis and medical diagnostics. We improve traditional TCL assays using the assistance of catalytic nanomaterials and construct a nanomaterials array for the...
Emine Göncü Başaran et al.
The Journal of prosthetic dentistry, 109(2), 88-94 (2013-02-12)
It is unclear if fiber-reinforced fixed dental prostheses can be fabricated with physical properties that make them suitable for definitive prostheses. The purpose of this study was to compare the load bearing capacity of fiber-reinforced and unreinforced computer-aided design/computer-aided manufacturing...
Sonia Kudłacik-Kramarczyk et al.
Materials (Basel, Switzerland), 13(15) (2020-07-29)
Barium titanate is a ferroelectric perovskite with unique electric properties; therefore, it is widely applied in the fabrication of inorganic coatings or thin films, capacitors, or in the production of devices for energy storage and conversion. This paper describes the...
Janós Szanyi et al.
The journal of physical chemistry. B, 109(1), 27-29 (2006-07-21)
Temperature programmed desorption, infrared spectroscopy, and (15)N solid state NMR spectroscopy were used to characterize the nature of the nitrate species formed on Al(2)O(3) and BaO/Al(2)O(3) NO(x) storage/reduction materials. Two distinctly different nitrate species were found: surface nitrates that are...
Shao-Xia Li et al.
Guang pu xue yu guang pu fen xi = Guang pu, 25(5), 665-668 (2005-09-01)
New long phosphorescent phosphors Ba(1 -x),Ca(x)Al2O4 : Eu2+, RE3+ (RE3+ = Dy3+, Nd3+) with tunable color emission have been prepared by solid state reaction. The luminescence properties of the samples are discussed and analyzed. The emission spectra show that the...
Emine Göncü Başaran et al.
Acta odontologica Scandinavica, 69(3), 144-150 (2011-01-07)
To compare handmade and computer-aided design-computer-aided manufacturing (CAD-CAM)-fabricated fixed dental prostheses (FDPs) composed of a particulate filler composite. Handmade FDPs were made of restorative composite (Z 100) and CAD-CAM-fabricated FDPs were made of commercial CAD-CAM blocks (VITA Temp) and two...
H Lu et al.
Advanced materials (Deerfield Beach, Fla.), 24(9), 1209-1216 (2012-01-27)
By using theoretical predictions based on first-principle calculations, we explore an interface engineering approach to stabilize polarization states in ferroelectric heterostructures with a thickness of just several nanometers.
D J Harris et al.
Physical chemistry chemical physics : PCCP, 7(8), 1839-1844 (2005-04-21)
We have modelled the surface diffusion and growth of BaO and SrO both in the homoepitaxial and heteroepitaxial (BaO on SrO and SrO on BaO) cases. The diffusion proceeds most favourably by an exchange mechanism involving the surface layer. When...
Takahito Kanie et al.
Dental materials journal, 21(1), 1-8 (2002-06-06)
This study examined the reinforcing effect of woven glass fibers on the relaxation modulus by three-point loading of denture base resin. Three sandwich-type flexure test specimens polymerized by heating were used, all 3 mm thick: glass fibers in compression (U...
I L Denry et al.
Journal of biomedical materials research, 63(1), 48-52 (2002-01-12)
The purpose of this study was to evaluate the effect of sodium content on the crystallization behavior of glass-ceramics in the system SiO(2)-MgO-CaO-Na(2)O-K(2)O-F. Five glass compositions were prepared with increasing sodium content. The compositions were melted at 1400 degrees C...
Andreas Sternig et al.
Small (Weinheim an der Bergstrasse, Germany), 6(4), 582-588 (2009-12-24)
Uniformly sized and shaped nanoparticles are well suited for the quantitative characterization of optical-powder properties. For the first time, quantum yields related to photoluminescence emissions that originate from the photoexcitation of MgO nanocube corners and edges are measured. In addition...

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