Materials Literature
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In recent years, [Fe-Fe]-hydrogenases have received considerable attention because it is helpful for the synthesis of new low-cost and highly efficient catalysts for hydrogen evolution 1 . X-ray crystallography revealed that the active site of [Fe-Fe]-hydrogenases contains a butterfly [2Fe-2S] cluster linked to a cuba…
Polyaniline (PANI) is one of the most attractive conductor polymers due to its high conductivity, chemical stability and easy polymerization.Polyaniline can be applied to actuators, super-capacitors, electromagnetic devices and especially gas sensors.The neodymium-bariumcopper ceramic, produced by oxide compounds (NBC…
This paper will discuss the comparison between the three leading Syngas manufacturing technologies; Partial Oxidation (POX), Autothermal Reforming (ATR) and the Steam Methane Reformer (SMR) technology. Also, this paper will discuss the development of the Catalytic Partial Oxidation COPox syngas technology. The discuss…
Porous dielectric materials with low dielectric constants (low-k, k = 1.8−2.5 have been used in integrated circuits for a long time to reduce RC time delays. Typical pores in low-k films are of size from 0.8 nm to 3.6 nm and can be observed with a scanning electron microscope. Normally, two-frequency discharge plasma…
Phase-Change Memory (PCM) is new memory technology and a possible replacement for DRAM, whose scaling limitations require new lithography technologies. Despite being promising, PCM has limited endurance (its cells withstand roughly 108bit-flips before failing), which prompted the adoption of Error Correction Technique…
The activation of NF-kB is an important precursor in developing melanoma. However the role of mechanical stimulation in the NF-kB activation has not been studied. We used a multiscale computational modeling approach to invest... | Find, read and cite all the research you need on Tech Science Press
Three precursors of group 11 metals, gold(I) 1,3-diisopropyl-imidazolidin-2ylidene hexamethyldisilazide, gold(I) tert-butyl-imino-2,2-dimethylpyrrolidinate, silver(I) tertbutyl-imino-2,2-dimethylpyrrolidinate were subjected to solution based NMR thermolysis studies. Rates of decomposition and order of reactivity were…
The SrA12O4 phosphor has been accepted as one of the most important persistent luminescent materials, due to the wide excitation spectrum, visible emission spectrum range, high luminescent intensity, long afterglow duration. This kind of material has been applied in painting, plastics, construction as pigments for saf…
O pegmatito granítico Alto Mirador é um corpo zonado, complexo, localizado no município de Carnaúba dos Dantas, Estado do Rio Grande do Norte, inserido na Província Pegmatítica da Borborema (PPB), nordeste do Brasil. A gahnita ocorre neste pegmatito com qualidade gemológica nas cores verde clara e verde escura. Sua co…
Metal Injection Molding (MIM) for small and complex components has been considered as one of potential processes in aerospace engine components. Carbon content increases during MIM process, mixture and sintering of metal powder with polymer binder may be concerned in terms of mechanical property. In this paper, two al…
Isotope dilution mass spectrometric (IDMS) and -ray spectrometric (GRS) methods have been used for the determination of uranium, plutonium, cesium and europium isotopes in cladding from pressurized water reactor nuclear fuel irradiated in a power reactor. A dissolution of cladding samples was performed through a two-s…
Σκοπός: Σκοπός της παρούσας μελέτης είναι να εκτιμηθεί η ελαστικότητα των μεγάλων αρτηριών και της λειτουργίας του ενδοθηλίου, καθώς και να διερευνηθεί η παρουσία φλεγμονής σε ασθενείς με ΠΓΑΓ.Μέθοδοι: Στη μελέτη έλαβαν μέρος 47 ασθενείς με ΠΓΑΓ και 38 υγιείς μάρτυρες αντίστοιχης ηλικίας και φύλου, εκ των οποίων κανεί…
CaLa2(MoO4)4:Er 3+ /Yb 3+ upconversion particles of were successfully synthesized by a microwave-assisted sol-gel method, followed by heat-treatment.Well-crystallized particles formed after heat-treatment at 900 °C for 12 h showed a fine and homogeneous morphology with particle sizes of 1-3 µm.With excitation at 980 n…
We studied the optically induced lattice dynamics in a magnetoelectric antiferromagnet Cr2O3 by polarization spectroscopy. The observed divergence behavior of the relaxation rate at the Néel temperature suggests the correlation between lattice and spin fluctuations.
A theoretical study about the influence of crystalline orientation on the energy conversion efficiency of two shape memory alloys is present. The study consider single crystal samples in simple tension. The results showed higher properties for of the NiTi than Cu-Al-Be, especially in the temperature-increment (ΔT) nec…
Aim of study: This study aimed to evalute ceramic surface roughness and micro shear bond strength of selfadhesiveflowable composite versus traditional flowable composite to all ceramic restoration. Materials and Methods:Sixty discs of IPS e.max press 8mm in diameter and 2mm thickness were fabricated according to manuf…
Femtosecond luminescence of graphene and graphite is studied from near- to mid-infrared regions. Remarkable reduction of lifetime at 0.3 eV in mono- and bi-layer graphenes is found, indicating carrier cooling due to interaction with substrate.
A new complex [Ni4(dhbd)4•8H2O]•13H2O (1) (H4dhbd = 2,3-dihydroxy butanedioic acid) has been synthesized and its structure (C16H16O45Ni4, Mr = 1163.13)was determined by single-crystal X-ray diffraction analysis.The crystal belongs to the monoclinic system, space group P21/c with a = 13.700(5), b = 17.143(5), c = 18.59…
The theory of linear magnetoelectric effect in magnetostrictive-piezoelectric bilayer structure is presented taking into account the dependence of mechanical oscillations’ strain amplitude on the specimen thickness for structures in the shape of a rectangular plate. The expression for frequency dependence of the ME ef…
2,5-Xylenol is a valuable intermediate for the preparation of phenolic resins, dyes, antiseptics, etc 1 . It was originally extracted from coal tar and then synthesized by chlorination or sulfonation of p-xylene 2 . But there are some drawbacks with these synthetic processes, such as multistep procedures and harsh con…