Materials Literature
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Operating distillation columns under control requires inferring the compositions of the distillate and bottom streams (which are challenging to measure) from other more easily measured variables, such as temperatures at different trays of the column. Models that can be used in this regard are called inferential models…
Of the fifteen known crystalline forms of ice, eleven consist of a single topologically connected hydrogen bond network with four H-bonds at every O. The other four, Ices VI-VIII and XV, consist of two topologically connected networks, each with four H-bonds at every O. The networks interpenetrate but do not share H-b…
This paper presents design and analysis of a Compact Multi Split Ring Resonator Loaded Antenna. μ-negative (MNG) metamaterial multi split ring resonator (MSRR) with four rings is used for loading purpose. The antenna performance is studied before loading and after loading. The antenna resonates at the frequency of 17.…
Oligoaryleneamines of different structures are synthesized. Their thermal characteristics are studied. Oligomer-polymer complexes are obtained based on these oligomers, and their structures are identified. The interaction in an aromatic oligobase-polyacid system is investigated with the use of spectrophotometry. It is…
The main crystallization trends of rare-earth complex oxides from alkaline phosphate-molybdate (tungstate) melts have been studied in a light of structure - luminescence properties relationships. The regions of formation MI3RE(PO4)2, REPO4 and MI2RE(PO4)(MVIO4) from self flux systems MI–P–RE–O (MI–alkaline metal; MVI–…
We demonstrate the fabrication and properties of an near ultraviolet organic light emitting diode (UV OLED) that contains 2,7-di(9-carbazolyl)-9-(2-ethylhexyl)carbazole organic emitting layer and aluminum-doped magnesium zinc oxide (ZnMgO:Al) layer as transparent electrode. The obtained ZnMgO:Al layer is transparent f…
The morphology of six populations of a rare freshwater species of diatoms, Cyclotella bodanica Eulenstein, from lakes of different geographic location is studied using SEM techniques. It is shown that some features (number of striae and marginal fultoportulae in 10 μm, number of thin costae in alveoli and their branch…
Transformer oil or insulating oil is usually a highly-refined mineral oil that is stable at high temperatures and has excellent electrical insulating properties. Its functions are to insulate, suppress corona and arcing, and to serve as a coolant. Transformer Oil Testing is a method, which should be a part of any cond…
Thick heterojunction cells composed of fullerene and p-type hole-transporting materials (HTMs) doped with molybdenum oxide (MoO3) were fabricated. The Fermi level (E F) of HTMs shifted toward the positive direction and close to the upper edge of the valence band following MoO3 doping. These E F shifts indicate that in…
Through different functionalization methods, three kinds of Rh-immobilized mesoporous silicas have successfully been prepared to investigate catalytic behavior, including yield and the linear/branched ratio of aldehyde (L/B) in 1-octene hydroformylation. A conventional post grafting method and two kinds of selective b…
Tri-layer process is the one of the key technique both for the lithography and etching around Hp20nm patterning. In applying for tri-layer process, we are focusing on inorganic type under layer which mainly containing Si atoms. This Si type hard mask (Si-HM) can perform not only as the Lithography performance enhancem…
Interior permanent magnet synchronous motors (IPMSMs) are widely used as highly efficient, high-performance motors. In an IPMSM, the magnet is mainly constructed of rare-earth materials. Recently, however, there has been a trend away from using rare-earth materials due to the high cost and the unpredictability involve…
In this paper, precise pulsewise current drive for switched reluctance motor under subharmonic PWM voltage control is presented. Different from the conventional hysteresis current control, sub-harmonic PWM scheme enables to design switching frequency of converter. However, subharmonic PWM voltage control requires adeq…
Currently, the manufacture of integrated circuits and fabrication of electronic devices requires the use of various types of chemical mechanical polishing compositions to selectively remove different metal, barrier, dielectric, low-k, ultra-low-k and other films at desirable rates to achieve the global planarization g…
Biphasic nanocrystalline zinc-bismuth alloys containing between 15 and 90 wt% of bismuth have been electrodeposited on copper sheets and brass cylinders from acidic electrolytes. Complexation of Bi3+ by gluconate in the zinc sulfate/ bismuth methanesulfonate containing electrolyte was not sufficient to shift the reduc…
This in-situ study demonstrates the feasibility of using energy dispersive x-ray diffraction (EDXRD) to characterize the internal structure and chemical composition of coin cell type Li-ion batteries. CR2032 coin cell batteries containing Li1-3xCrxFePO4 (with x = 0.015) or LixMn1.42Ni0.42Co0.16O4 cathode were studied…
Time-dependent diffusion coefficient and conventional diffusion constant are calculated and analyzed to study diffusion of nanoparticles in polymer melts. A generalized Langevin equation is adopted to describe the diffusion dynamics. Mode-coupling theory is employed to calculate the memory kernel of friction. For simp…
A presença simultânea de gibbsita, caulinita, argilominerais 2:1 com polímeros de hidróxi-Al (2:1HE) e interestratificados em solos ácidos e dessaturados do Sul do Brasil pode ser considerada contraditória, mas não rara. Como a correta identificação destes argilominerais é de difícil execução, a evolução destes solos…
Monolithic titania materials with macro-mesoporous skeleton were prepared through a template-free sol-gel synthesis route, based on the reaction of hydrolysis and polycondensation of titanium isopropoxide. Acetic acid (HAc), hydrochloric acid (HCl), and redistilled H2O were utilized as the starting reagents, without t…
Furanocoumarins are the major phytoalexins of Ficus carica and are effective natural drug candidates for treatment of several types of cancer and skin disease. The objectives of this study were to analyze and quantify linear furanocoumarins, mainly psoralen and bergapten, in wood and bark of stems from eight Algerian…