Materials Literature
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A caracterização da MOS (matéria orgânica solúvel) e dos produtos resultantes da hidropirólise em amostras de\nasfaltenos provenientes de arenitos asfálticos da Fm. Pirambóia da Bacia do Paraná, através da cromatografia liquida e\ngasosa (n-alcanos, pristano, fitano e biomarcadores), proporcionaram um melhor entendime…
Import 03/08/2012
The aim of this Bachelor´s thesis is primarily to create a komplex work to provides a comprehensive overview and theoretic rudiment to understand methodology arc coated electrode welding and secondary to create teacher´s book or theoretical instrument of this metodology. The thesis are focused generally on progress of…
Cataloged from PDF version of article.
Titanium Aluminum Nitride (TiAlN) est un revêtement industriel important puisqu'il améliore la dureté et la résistance à la corrosion. L'objectif de ce travail est de développer des techniques chimiques qui enlèvent de façon sé¬lective des revêtements de TiAlN déposés sur des substrats de Titane. La solution chimique…
The evolution of adaptively significant gene families is an important subject in the field of evolutionary genetics. For spiders, the gene families encoding silk proteins have received considerable attention due to the high performance capabilities of the fibers they produce. However, silk gene research has largely fo…
A utilização de fibras vegetais como possível reforço alternativo às fibras sintéticas, como as fibras de vidro, em compósitos poliméricos atende a nova exigência de desenvolvimento de materiais com tecnologia ambientalmente sustentável. Tais compósitos podem atender à busca por novos materiais em setores industriais,…
本文对Bi1 -xSmxFeO3和Bi1-xLaxFeO3样品的拉曼光谱进行了研究,结果表明当掺Sm量达1S％时,170 cm-1和272 cm-1模消失,287 cm-1新模出现,Bi1-xSmxFeO3样品发生了三角到三斜的结构相变；而当La量达30％时,175 cm-1、219 cm-1和348 cm-1模消失,Bi1-xLaxFeO3样品才发生三角到正交的结构相变.这归因于Sm的有效离子半径与Bi的差别较大.掺杂导致的拉曼峰蓝移归因于离子间的作用增强.
The environmental impacts of material production and processing are rapidly increasing and critical. These impacts can be reduced, to some extent, by development of either a suitable material or by implementing a novel process route to improve the material efficiency. In such circumstances, the recent emergence of nea…
Abstract—This paper presents a new unified power-quality conditioning system (MC-UPQC), capable of simultaneous compensation for voltage and current in multibus/multifeeder systems. In this configuration, one shunt voltage-source converter (shunt VSC) and two or more series VSCs exist. The system can be applied to adj…
Of the entire human genome, 90% of all genetic information is transcribed but only a fraction of that subsequent RNA is translated into proteins. RNAs which are not translated into proteins are deemed non-coding RNAs. Little is known about this large category of noncoding RNAs, although they perform a variety of funct…
It is well known that temperature has a great influence on performance of asphalt layers. Low temperatures raise the asphalt stiffness modulus which finally results in low temperature cracking. On the other hand, the increase of the temperature softens the asphalt binder and the stiffness modulus significantly drops.…
The success of nanotechnology will undoubtedly lead to the increased introduction of nanoparticles (NPs) into natural systems, and aquatic systems will likely act as sinks for these new pollutants. Differences in the chemistry of these aquatic systems will control changes in surface properties of NPs and therefore cou…
El prefijo 'nano' ha estado presente en los ultimos anos en un elevado numero de articulos, libros y material cientifico en general. La Quimica Analitica no ha sido ajena este impacto y ha ido incorporando de forma sistematica las distintas nanoparticulas y/o nanomateriales a sus procesos de medida, tanto como analito…
The focus of this work is on the design and fabrication of novel optical devices that exploit gradients in refractive index to bend and redirect light with a new level of control. Optical devices have now entered every facet of modern life, and enormous potential exists to harness light in new or more efficient ways.…
The article dwells on the process of integrated plant #817 (PA Mayak) expansion in production of plutonium and tritium for nuclear and thermonuclear weapon. It shows the reasons for concentration of all types of nuclear and thermonuclear charges production on the confined territory of the only in the 1948-1950s plant…
In the foundry, existing strength testing machines are used to measure only the maximum fracture strength of mould and core materials. With traditionally used methods, the loading history to ascertain deformation of the material is not available. In this paper, a novel moulding material strength testing machine was de…
The use of nanoparticles for drug delivery is an emerging nanotechnology that has generated much interest in overcoming challenges of current drug delivery systems (DDS) and replacing them. Mesoporous silica nanoparticles (MSNs) can be modified to provide for dual-stimulus responsive drug release. The capping mechanis…
Graphene as a conductive, transparent material, with a low cost and low environmental impact is reported to be ideal for sensor application. It is broadly investigated and promises an improvement of sensing performance due to its unique electrical transport properties. Therefore the use in active sensor elements such…
Fine of Al2O3 Powder was calcined at 200°C, 400°C, 600°C, and 800°C respectively for 2 hours under static air, x-ray diffraction, optical microscope and grain size distribution were done to analysis the resulting data after calcinations process. Batter particle size was achieved at 800°C of value (0.486) μm, while bat…