Materials Literature
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In this work, a 3D model of a PEM fuel cell has been developed for water saturation and its effects using a validated approach considering the internal movement of water across the membrane. For different operating levels, it was found that at lower current densities, the maximum saturation occurs faraway region from…
Paper presented at the 8th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Mauritius, 11-13 July, 2011.
Produced from «Bioplastotan» resorbing polyesters (linear polyesters of hydroxyl derivatives alkanoic acids) scaffolds for cell culturing such as films, pressed 3-D forms and nonwoven fabric from ultrathin fibers are characterized. Two types of polymers a homopolymer of the 3-hydroxybutyric acid and a copolymer formed…
Investigámos o comportamento de hidrogénio isolados em paratellurite \n(α-TeO2), por meio de medições espectroscopia de muão positivo (μSR). Os \nestados metaestáveis observáveis acessíveis por meio da implantação do muão \npermitiram-nos sondar as configurações dadora e aceitadora do hidrogénio, \nbem como acompanhar…
Micropore-free SBA-15-type mesoporous molecular sieves MSAMS-2 and MSAMS-4 show extraordinary stability both in boiling water (100 °C over 360 h) and high temperature steam (800 °C for 6 h). FT-IR together with XRD, FE-SEM and HR-TEM characterizations demonstrate the zeolite-like five-membered ring subunits other than…
ZK60 -- 嗯(耳) 合金被融化 ZK60 和 Mg-Er 镁合金做(20 wt.% 嗯) 在一个电的抵抗炉子。内容嗯是 0， 0.5， 1， 2， 3 wt.% 分别地。影响嗯在团结行为，微观结构，抵抗的腐蚀和 ZK60 的机械性质上，镁合金被学习。结果证明在团结期间形成的那个长像杆的阶段(ErZn5 ) 与增加增加了嗯在范围的内容调查了，它导致了在阶段粒子和合金矩阵和腐蚀的显著改进之间的流电的 couplings 的数量的减少抵抗。合金的延伸与增加减少了，这也被发现嗯合金的内容，而是张力的力量被 Er 的增加由于沿着谷物边界散布的阶段的加强的效果改进。
La premiere partie de ce travail a porte sur l'analyse de la structure et la biosynthese du peptidoglycane (PG) de Clostridium difficile. Le PG montre une architecture originale avec une N-deacetylation tres marquee des residus N-acetylglucosamine des chaines glycanes ainsi qu'une proportion predominante de pontages i…
The influence of the major compensating defects As antisites (AsGa) and Mn interstitials (MnI) in the Ga0.946Mn0.054As diluted magnetic semiconductor (DMS) were studied by X-ray absorption spectra (XAS). The experimental results show that the defects in Ga0.946Mn0.054As grown at lower temperature (TS=200℃) is mainly A…
Several composite materials based on nanoscale (10-100 nm) hard magnetic iron and nickel particles introduced into low-density polyethylene matrix have been synthesized using high-voltage (19-20 kV) short-pulse (10-20 ms) electrohydraulic charge (impact). It has been found that electric charge stabilizes both size and…
Ni°-nanoparticles of 0–8 nm were prepared in situ by impregnation of Ni(CH3COO)2 into the nanopores of modifiedmontmorillonite(Mt)followedbypolyolreduction.TheMtwasactivatedwithHClundercontrolled condition for generating desired pore sizes. The porous materials were characterized by XRD, TEM, SEM, UV–visible spectrosco…
Laser cooling of solid material has become a new developing research area in recent years. Tm3+ doped ZrF4-BaF2-LaF3-AlF3-NaF-PbF2 glass is one of the hot materials in this field. Compared with Yb3+, Tm3+ has better cooling potential. Up to date, one of the main factors restricting the cooling effect is fluorescent re…
本文介绍采用厌氧接触-活性污泥-MBR工艺在某豆制品废水处理的应用情况。工程实践表明，进水CODGr为3500～4500mg／L，BOD5为2000-2400mg／L，NH3-N为30-40mg／L时，出水CODCr为30—45mg／L，BOD5为10～15mg／L，NH3-N为2-3mg／L，达到《上海市污水综合排放标准》（DB31／199—1997）二级标准。
Heterogeneous synthesis of nitrates on the surface of alkali-halide microcrystals has been investigated when the crystal-air system is activated by X-ray radiation. The investigations of nitrate crystallization on the surface of activated alkali-halide microcrystals have been carried out using electron microscopy and…
Die vorliegende Arbeit untersucht den Inkjet-Druck als Verfahren zur Integration passiver Bauelemente in elektronische Dickschichtschaltungen auf Keramiksubstraten. Verarbeitet werden hochfeststoffhaltige Partikeltinten. --- Im Vordergrund der Untersuchungen stehen die Besonderheiten bei der Realisierbarkeit der Bauel…
Los aluminuros de titanio aparecen como una alternativa al empleo de aleaciones base niquel en trabajos a elevada temperatura, debido a que en estas condiciones son capaces de retener sus propiedades mecanicas, presentando ademas un mejor comportamiento a corrosion, oxidacion y fluencia. En el presente trabajo se expo…
Biodiversidad de cianobacterias en rios de la Comunidad de Madrid. Analisis polifasico y aplicacion en biomonitorizacion.
Die Arbeiten untersuchen mit elektrophysiologischen und molekularbiologischen Methoden den intrinsischen, wenig selektiven, hyperpolarisationsaktivierten, und durch cyclisches Nukleotid gesteuerten Kationenstrom Ih in Expressionssystemen und Neuronen des Zentralen Nervensystems. Besondere Beachtung finden seine Eigens…
Development of optimal design of antenna arrays is now an urgent task. You must calculate the directional characteristics of antenna arrays. In this article a discrete mathematical model of propagation of electromagnetic waves from an antenna array of beveled waveguides. To improve the smoothness of the grid were used…
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Anomalous electrical behaviour may appear in the d.c. and a.c. characteristics of metals or semiconductors in which the current is determined by both voltage and temperature. Theoretical investigations have been carried out by assuming different models of heat flow and the conditions for the appearance of thermal brea…