Materials Literature
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본 논문에서는 쇼트피닝 가공된 Alloy 600 재료의 고온환경하에서의 압축잔류응력 및 피로거동에 대해 연구하였다. 연구에 사용된 Alloy 600 재료는 원자력발전소에서 사용되는 주요부품 소재이며, 피닝가공으로 형성된 압축잔류응력은 응력부식균열(SCC; Stress Corrosion Cracking)의 발생을 크게 억제하는 것으로 알려져 있다. 현실성 있는 실험결과를 획득하기 위하여 실제 국내 원자력 발전소 주요부품의 사용온도를 포함한 고온 환경에서 피로특성 및 압축잔류응력을 평가하였다. 연구결과 약 538℃이하에서는 피닝가공 효과가 존재하는 것으로 파악되었다.…
El objetivo principal de la presente investigación ha sido desarrollar una nueva clase de materiales nanocompuestos orgánicos-inorgánicos basados en la capacidad de los copolímeros de bloque de auto-organizarse promoviendo la dispersión de nanopartículas, así como relacionar las diferentes morfologías obtenidas con la…
Divers facteurs influencent la qualité de l'eau des rivières.• Certains, comme l'occupation des sols, peuvent être modifiés par les activités humaines et notamment par l'aménagement du territoire.Agir sur les paysages pour améliorer la qualité de l'eau, une nouvelle approche pour un aménagement durable des territoires
En este artículo, dos aleaciones intermetálicas se prepararon con las composiciones nominales Al-Ni25 y Al-Ni24 (% at.) mediante la técnica de colada por gravedad y después fueron sometidas al proceso de molienda de bolas en húmedo. Estas aleaciones fueron estudiadas por difracción de rayos X (DRX), microscopía electr…
We report measurements of the temperature $T $ dependence of the linear polarization $\langle P\rangle $ of the thermal radiation emitted by thin, incandescent tungsten wires. We investigated an interval ranging from a little above room temperature up to melting, $T_m\approx 3700\,$K. These are the first measurements…
En este trabajo se analiza el comportamiento tribológico en términos de fricción y desgaste de las películas delgadas CrN/AlN depositadas sobre el acero H13 mediante plasma. Las películas se prepararon con pulverizado reactivo y mezcla convencional de gases Ar + N2, posteriormente añadiendo más gas reactivo a la mezcl…
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In this paper, PVC(poly-vinyl chloride) industry is to develop ways to grow by seeking import and/or export status, problem analysis and resolution in order to enviro-friendly management of PVC scrap for recycling. Thus PVC scrap recycling industries were investigated to visit PVC association, PVC resin producer, PVC…
摘要： 以吡咯和对硝基苯甲醛为原料,经过环化、还原和缩合,合成了meso-四[(4-苯乙烯氨基)苯基]卟啉(TBAPP),通过UV-Vis、FT-IR、1H NMR及元素分析等对产物进行了表征,并对其荧光和电子顺磁共振特性进行了研究。 卟啉产物的EPR测定显示出游离基特征,表明卟啉分子的大π共轭结构对周边基团产生的自由基有稳定作用。 取代基对卟啉的紫外可见吸收、光致发光及电子顺磁共振特性均有影响。 四席夫碱苯基卟啉TBAPP的Q带比前体四氨基卟啉（TAPP）和母体四硝苯基卟啉（TNPP）红移，而Soret谱带变化较小；TBAPP的440 nm光激发的最大荧光峰658 nm分别比TAPP蓝移5 nm和比TNPP红移9 nm;TBA…
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University of Minnesota Ph.D. dissertation. March 2013. Major: Chemistry. Advisor: Andreas Stein,. 1 computer file (PDF); xx, 194 pages.
We report a first year seminar course on nanoengineering, which provides a unique opportunity to get exposed to the bottom-up approach and novel nanotechnology applications in an informal small class setting early in the undergraduate engineering education. Our objective is not only to introduce the fundamentals and a…
RemerciementsÀ la fondation de l'Université du Québec à Trois-Rivières pour la bourse d'initiation à la recherche d'Hydro-Québec et au département de Chimie et Physique pour le soutient financier pour l'impression de l'affiche.Les résultats obtenus nous permettent quand même de considérer le LiBH 4 comme catalyseur po…
Abstract : Loss of nerve function occurs when a nerve is severed. Any significant loss of nerve tissue requires a graft to restore continuity and promote nerve regeneration and recovery of function. Presently, there is no acceptable nerve grafting method for the repair of extensive nerve damage. An acellular nerve all…
The biological studies related to the diameter of TiO₂ nanotube have mainly focused on the biocompatibility and functionality of cells. The purpose of this study was to evaluate the size effect of various TiO₂ nanotube diameters on inflammatory responses such as the generation of iNOS, NO and interleukin-1β(IL-1β), an…
A substantial amount of research has already been undertaken towards \ncreating commercially viable organic photovoltaics (OPVs). This is due to the \npotential use of OPV cells as an inexpensive source of renewable energy. There are \nmany factors to consider in OPV cell design, including photo-active materials, cell…
Πρόδρομο υλικό για την παρασκευή γ-Al2O3, καθώς και όλων των υπολοίπων μεταβατικών ή ενεργών αλουμινών (η-, δ- και θ- Al2O3) που χρησιμοποιούνται σε καταλυτικές εφαρμογές, αποτελεί τόσο το υδροξείδιο του αργιλίου (γιββσίτης, γ-Al(OH)3) όσο και το οξυ-υδροξείδιο του αργιλίου (βαιμίτης, γ-AlOOH). Η απόδοση των προϊόντων…
Gallium Nitride (GaN) high electron mobility transistors (HEMTs) offer higher power output over existing technology. However, issues such as current collapse and kink effect hinder GaN HEMTs performance. The degraded performance is linked to traps within the device. Capacitance-voltage (C-V) and current-voltage (I-V)…
The study for using as recycle the cementitious powder consisting among the waste concrete, which accounts for more than 60%, could be achieved by authors. However, many practical problems that the lack of compressive strength due to internal fine aggregate and becoming free lime due to imbalance of raw chemical ingre…
A learning module for molecular level analysis of protein structure and ligand/drug interaction through the visualization of X-ray diffraction is presented. Using DeepView as molecular model visualization software, students learn about the general concepts of protein structure. This Biochemistry classroom exercise is…