Viscometer
Mostrando 1-12 de 41 artigos, teses e dissertações.
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1. β-Tricalcium phosphate shaped by replica method
Resumo Biomateriais, como o fosfato tricálcico, podem apresentar diferentes taxas de reabsorção no organismo que dependem das suas propriedades físico-químicas sendo que a condição superficial, tais como morfologia, tamanho de partículas e porosidade, é de fundamental importância. Assim, neste trabalho, estudou-se o recobrimento da matriz Luffa cyl
Cerâmica. Publicado em: 14/11/2019
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2. Influence of the chemical structure of different carboxymethylcelluloses on the performance of clay dispersions
Resumo Este trabalho teve como objetivo avaliar a influência da estrutura química da carboximetilcelulose (CMC) no desempenho reológico e de perda de filtrado de dispersões de argila. As dispersões foram preparadas com concentração fixa de argila bentonítica (15 g/350 mL de água) e diferentes concentrações de CMCs (0,5, 1,0, 2,0 g/350 mL de água)
Cerâmica. Publicado em: 2019-01
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3. Study of Continuous Rheological Measurements in Drilling Fluids
Abstract Drilling an oil well involves using drilling fluids that perform cleaning and cooling functions, but that most importantly maintain the fluids of the geological formation contained by hydraulic pressure. A fundamental role in predicting the hydraulic pressure of the well consists of monitoring the fluid’s rheological behavior. This paper summarize
Braz. J. Chem. Eng.. Publicado em: 2017-07
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4. Rheological Characterization of Bentonite Dispersions with Xanthan for Oil Well Drilling Fluids
Shear tests using a coaxial cylinders viscometer were performed in order to determine the rheological and thixotropic properties of xanthan gum dispersions with sodium bentonite in the presence of high salt concentrations of sodium and calcium chlorides. The dispersions rheology with different temperatures and concentrations of NaCl, CaCl2 and xanthan gum we
Mat. Res.. Publicado em: 05/06/2017
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5. The effect of gamma radiation on mechanical properties of biodegradable polymers poly(3-hydroxybutyrate) and poly(3-hydroxybutyrate-co-3-hydroxyvalerate)
Brazilian poly(3-hydroxybutyrate), P(3-HB), and its copolymer, poly (3-hydroxybutyrate-co-3-hydroxyvalerate), P(3-HB-co-3-HV) were irradiated with gamma radiation (60Co) at room temperature and in the presence of oxygen. The viscosity-average molar mass (Mv) was analyzed by viscometry using an Ostwald-type capillary viscometer. Both polymers showed a decreas
Mat. Res.. Publicado em: 11/12/2012
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6. Effects of Sasobit® content on the rheological characteristics of unaged and aged asphalt binders at high and intermediate temperatures
This paper describes the rheological properties of PG64, PG70, and PG76 asphalt binders blended with different Sasobit® contents. The rheological properties of the Sasobit®-modified binders were characterized after being subjected to different aging conditions using the dynamic shear rheometer (DSR) and rotational viscometer (RV) according to SuperpaveTM t
Materials Research. Publicado em: 31/07/2012
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7. Caracterização físico-química do leite de ovelhas da raça Lacaune e análise do rendimento de coalhada com Caracterização física do soro obtido
O leite ovino se diferencia do das demais espécies devido à sua riqueza em sólidos. Contudo, mesmo no caso de raças especializadas, a produção de leite é representativamente menor, em termos de volume, quando comparado ao leite de vaca. Em função disso, o resfriamento prolongado ou o congelamento do leite podem ser uma alternativa ao produtor e à i
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 2012
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8. Determination of rheological properties of fresh concrete and similar materials in a vibration rheometer
A vibration rheometer has been developed for the purpose of determining the viscosity coefficient and the yield value of fresh concrete under vibration. The main parts of the apparatus, a test specimen and a vibration source form a unitary oscillatory system whose parameters can be measured with sufficient precision. Two types of fine grained reference mater
Materials Research. Publicado em: 22/12/2011
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9. Efeitos imediatos da circulação extracorpórea sobre o sistema mucociliar / Immediate effects of cardiopulmonary bypass on mucociliary system
BACKGROUND: Cardiopulmonary bypass (CPB) is an important etiologic factor for lung injury observed after cardiac surgery. However, the impact of CPB on respiratory mucociliary function is unknown. The objective of this study was to assess the immediate effects of CPB on mucociliary transport system. METHODS: Twenty-two mixed breed of Large White and Landrace
Publicado em: 2011
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10. InovaÃÃo tecnolÃgica baseada na produÃÃo de biopolÃmero com viabilidade para inoculante rizobiano
The biopolymers are polysaccharide from microbial origin, synthesized by bacteria, fungi and yeast. They are also known as gums due to their capacity to produce viscous solutions and gel in an acquoso medium. The production of microbial Exopolysaccharide (EPS) has been an object of intensive research, due to its high application and potential in different fi
Publicado em: 2008
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11. Avaliação da perda de carga e do fator de atrito no escoamento de fluidos de perfuração em geometrias circular e anulares concêntricos / Load loss and friction factor in the disposal of drilling fluids in circular geometry and concentric rings
The constant search for new technologies of drilling oil wells has reinforced the research and development of drilling fluids and the specific study of their disposal, particularly with regard to the load loss caused by the different geometries. Within this context, this study focused on the load loss and friction factor in the disposal of the drilling fluid
Publicado em: 2008
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12. Valorização de resíduos industriais como fonte alternativa mineral : composições cerâmicas e cimentíceas
This present work describes studies of valorization of wastes as alternative raw materials. Different industrial wastes, based on the SiO2-Al2O3-CaO system and classified as non-hazardous, were selected: Al-rich anodizing sludge, sludge from the filtration/clarification of potable water, sludge generated in ornamental stone-cutting processes, and foundry san
Publicado em: 2006