Materials Literature
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Multifunctional nanocomposites have the potential to integrate sensing, diagnostic, and therapeutic functions into a single nanostructure. Herein, we synthesize Fe3O4@polydopamine core-shell nanocomposites (Fe3O4@PDA NCs) through an in situ self-polymerization method. Dopamine, a melanin-like mimic of mussel adhesive…
This study examined compositions and amounts of materials accumulated in a digester tank for methane fermentation after 7.5 years of operation. Approximately 20 m3 of sediments including large amounts of inorganic materials such as sand were found at the bottom of the digester tank. The accumulation of sand is unavoid…
Theoretical Study on the Molecular Mechanism of Ice Melting and the Local Structure of Aqueous Solutions
Ces dernières années, la physique de la matière condensée a connu une profonde révolution de concepts par la découverte de nombreuses phases de la matière qui ne sont pas classifiables à la Landau, c’est à dire par leur groupe de symétrie. Si les premiers travaux remontent à ceux des effets Hall quantiques (entier et…
As indústrias que desenvolvem motores de combustão interna têm como preocupação atual prover motores que sejam cada vez menos poluentes, uma vez que a preocupação com a preservação do meio ambiente é intensa em todo o mundo. No entanto, com o desenvolvimento de novas tecnologias destinadas à redução das emissões, a co…
O uso de materiais orgânicos em dispositivos eletrônicos, além de menor custo e facilidade de processamento, permite obter flexibilidade e transparência. Entretanto, para que a aplicação comercial desses materiais seja viável, os processos que ocorrem nos dispositivos ainda precisam ser mais bem compreendidos, visando…
CAPES - Coordenação de Aperfeiçoamento de Pessoal de Nível Superior
Dissertação (mestrado)—Universidade de Brasília, Faculdade de Tecnologia, Departamento de Engenharia Civil e Ambiental, Dissertação de Mestrado em Estruturas e Construção Civil, 2014.
Sem bolsa
The component strength of new types of pipelines is investigated which are flexible pipelines designed for transportation of compressed natural gas, one component of which is a cylinder in a combination with a truncated cone and a spherical segment. The algorithm of calculations is described and the results of calcula…
The formation of spot deposition and figure of metallization under microplasma deposition of coatings from hydroxyapatite is investigated. The loss of spray material due to the geometric factor is defined.
Several women have been successful candidates in Latin American presidential elections during the last decade. But this historical success has been limited to only a few countries in the region. What are the main causes of this variation? The article develops arguments stemming from the institutionalist theory and pro…
International audience
Sous l’effet des sollicitations mécaniques répétées induites par les passages des trains, on observe l’apparition de fissures de fatigue de contact dans les rails. Une fois amorcées, celles-ci peuvent se propager et mener à la rupture du rail. Dans un contexte d’intensification du trafic et d’augmentation globale des…
Copper makes its first appearance in human culture at about 5000 BCE and was the first metal to be smelted. It was the major partner in defining the Bronze Age and, today, with the globally increasing desire for electrical technology, demand for copper has never been greater. In addition to looking at the historical d…
In this chapter we will encounter calcium's role in providing evidence for the Big Bang. The importance of calcium compounds in structures from the smallest coccoliths (marine organisms) to the largest buildings, its abundance in hard water and its role in cellular development and communication. In none of these examp…
The article discusses the application of the surfaces micro-arc oxidation competitive method for parts made of titanium alloys.
The experience and results of research of hardening modes of steel products 40H13 in a vacuum, in a single-unit and small-scale production is described. There is shown the effectiveness of high-temperature hardening with outdoors cooling of vacuum chamber. The mathematical model of the cooling of the vacuum chamber is…
The paper presents results of research on abrasive wear of the coating WOKA PTA-6040 formed by plasma powder welding with arc currents 70A, 85A and 100A. Some patterns of wear of the deposited material due to the peculiarities of distribution in it of carbide phase at various currents of plasma arc are identified. The…
There is presented the development of the experimental thermal booth for research and model (similar to full-scale) testing of materials and coatings for simulating complex heat transfer with a substantial portion of the radiant components in various types of combustion chambers during operation turbine elements, a va…