Comminution
Mostrando 13-24 de 25 artigos, teses e dissertações.
-
13. Caracterização e separabilidade de agregados miúdos produzidos a partir de resíduos de construção e demolição. / Technological characterization and separability studies on fine aggregates produced from construction and demolition waste.
The current demand for recycling on construction is due to the increasing consumption of aggregates, the exhaustion of deposits close to large cities as well as the ban on inert materials dumping in landfills and the rising cost of its disposal. Moreover, with the remarkable increasing on construction activities in many countries, the management of Construct
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 26/08/2011
-
14. Functional outcomes of conservatively treated clavicle fractures
OBJECTIVE: The main aim of the study was to analyze the outcomes of clavicle fractures in adults treated non-surgically and to evaluate the clinical effects of displacement, fracture patterns, fracture location, fracture comminution, shortening and fracture union on shoulder function. METHODS: Seventy clavicle fractures were non-surgically treated in the Ort
Clinics. Publicado em: 2011
-
15. âInfluÃncia da adiÃÃo de cargas inorgÃnicas no desempenho de produtos refratÃrios obtidos a partir de borras de alumÃnioâ / âInfluence of addition of inorganic fillers on the performance of refractory products made from aluminum sludgeâ
ABSTRACT White dross is a reject generated during aluminium production. It contains several oxides that can be useful to the refractories and cement industries. However, white dross can be hazardous both to human health and the environment. In this work, white dross was evaluated as a prospective raw material for the production of refractories. For this purp
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 16/11/2010
-
16. ESTUDO DA TRANSFORMAÇÃO DE FASES DAS LIGAS U-2,5Zr-7,5Nb E U-3Zr-9Nb TRATADAS TERMICAMENTE A 600 C E DA COMINUIÇÃO PELO PROCESSO DE HIDRETAÇÃO-DESIDRETAÇÃO / PHASE TRANSFORMATION STUDY OF THE U-2.5Zr-7.5Nb AND U-3Zr-9Nb ALLOYS ISOTHERMALLY TREATED AT 600 C AND OF THE COMMINUTION BY THE HYDRIDING-DEHYDRIGING PROCESS
O combustível nuclear metálico tipo placa em dispersão é um combustível versátil que pode ser projetado para ser utilizado tanto em reatores de testes quanto em reatores de potência. A elevada densidade das ligas metálicas de urânio com elementos de transição, como, Zr, Nb, Mo, etc, propicia o emprego deste combustível utilizando urânio com baix
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 23/06/2010
-
17. Estudo das contaminações provenientes do processo de cominuição de amostras geológicas / A study of contaminations derived from comminution processes of geologic samples
A cominuição de amostras geológicas envolve etapas para reduzir seus grãos garantindo sua representatividade, com o auxílio de vários equipamentos de moagem de amostras. São duas as contaminações que podem ser causadas durante o uso desses equipamentos. A primeira é a contaminação primária, pelo contato face a face entre a amostra e os component
Publicado em: 2010
-
18. Empresa e família: instituições que se entretecem na continuidade de uma cultura organizacional
Understanding enterprise and performing actions to achieve the desired goals is to unravel the rules, customs, habits, social rules, dreams, emotions and meanings that constitute it. It is to recognize that economic rationality is intertwined with subjectivity, ultimately. It is to understand the individuals and the relationships they build their organizatio
Publicado em: 2010
-
19. Instalações de britagem, condições de trabalho e de processo : uma abordagem de saúde e segurança
A cada dia aumenta a preocupação com relação às condições de exposição ocupacional dos trabalhadores, nos mais diversos setores, tanto em nível da análise dos postos de trabalho quanto das implicações legais decorrentes destas. No presente estudo, sobre as atividades desenvolvidas em instalações de britagem, objetivou-se criar um modelo para a
Publicado em: 2007
-
20. Estudo do comportamento do concreto no estado fresco contendo areia britada
The crushed sand possesses different characteristics from the natural one, mainly due to the high fine materials contents, particle size distribution, shape, roughness and lithological types. It is formed during the process of comminution of rock, and its able to suffer classification and improvement of the particles shape. Such characteristics affect, in la
Publicado em: 2007
-
21. Preparation and study of photodegraded polimeric matrix composites for photovoltaic cells encapsulation / Preparação e estudo da fotodegradação de compósitos de matriz polimérica para encapsulamento de células fotovoltaicas
The solar cells components are made off blades and metallic and ceramic semiconductors films. Such materials are not inert to the terrestrial atmosphere action. In this context, important part of the fotovoltaics modules production includes stages for the cells protection. These will have to be preserved from aggressive actions of the environment, for what t
Publicado em: 2007
-
22. Caracterização de agregados de resíduos de construção e demolição reciclados e a influência de suas características no comportamento de concretos. / Characterisation of recycled aggregates from construction and demolition waste and the influence of their characteristics on concrete mechanical performance.
Construction and demolition waste (CDW) recycled aggregates are not largely used in concrete due to CDW composition heterogeneity and CDW recycled aggregate physical property variability from visual classification and hand sorting of proposed standards that provide insufficient relation between the aggregate characteristics and concrete performance. This the
Publicado em: 2005
-
23. Distal Radius Fractures in Older Patients: Is Anatomic Reduction Necessary?
The relationship between radiographic and functional outcomes in older patients with distal radius fractures is controversial. We explored this relationship by assessing the influence of radiographic displacement and fracture comminution on the functional outcomes of these fractures. We also asked whether operative intervention and demographic factors (age,
Springer-Verlag.
-
24. Membranes of Rhodospirillum rubrum: physicochemical properties of chromatophore fractions isolated from osmotically and mechanically disrupted cells.
Isolation of highly purified membrane fractions from phototrophically grown Rhodospirillum rubrum was achieved by velocity and isopyknic sedimentation under carefully controlled ionic conditions. Bacteriochlorophyll-rich and succinic dehydrogenase-rich chromatophores that were essentially devoid of contamination by non-chromatophore protein were separated fr