Bubbles
Mostrando 13-24 de 209 artigos, teses e dissertações.
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13. Influence of agitation intensity on flotation rate of apatite particles
Abstract The agitation intensity has a directly influence on flotation performance, lifting the particles and promoting the contact of bubbles and particles. In this paper, the energy input by the agitation on apatite flotation was investigated. The influence of pulp agitation in the flotation rate of particles with different sizes and two dosage levels was
REM, Int. Eng. J.. Publicado em: 2017-12
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14. Gelatin capsule waste: new source of protein to develop a biodegradable film
Abstract This work aimed to develop biodegradable films utilizing a new source of gelatin derived from the nutraceutical capsule manufacture waste of coconut with safflower oil, coconut oil and safflower oil. The mechanical, physicochemical, barrier, optical, biodegradation, thermal and morphological properties were evaluated. All films showed low water vapo
Polímeros. Publicado em: 29/06/2017
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15. Hydrodynamics of an external-loop airlift reactor with inserted membrane
Abstract The objective of this study was to investigate the hydrodynamics of an external-loop airlift membrane reactor (ELAMR). The ELAMR was operated in two modes: without (mode A) and with bubbles in the downcomer (mode B), depending on the liquid level in the gas separator. The influence of the gas distributor’s geometry and various alcohol solutions on
Braz. J. Chem. Eng.. Publicado em: 2017-04
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16. Effects of the application techniques of self-adhesive resin cements on the interfacial integrity and bond strength of fiber posts to dentin
ABSTRACT Objective: To evaluate the influence of an application technique of a glass-fiber post using self-adhesive resin cements on the push-out bond strength and the presence of bubbles in the root thirds. The cements were either applied according to the manufacturer's instruction or using a commercial delivering system (Centrix), at which the cement past
J. Appl. Oral Sci.. Publicado em: 2016-10
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17. Mini-review on Bubbfil spinning process for mass-production of nanofibers
Bubbfil spinning is to use polymers' or melts' bubbles or membranes for fabrication of nanomaterials including smooth nanofibers and discontinuous nanofibers by using electrostatic force, blowing air or mechanical force to overcome the surface tension, it mainly includes the bubble-electrospinning, blown bubble spinning and membrane spinning. The initial eje
Matéria (Rio J.). Publicado em: 2014-12
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18. Effect of solution concentrations on the morphology of nylon6/66 nanofibrous yarns by blown bubble-spinning
In this paper, a novel method called blown bubble-spinning was employed to produce nanofibers. Compared with the traditional technologies, such as melt blowing and electrospinning, hot airflow is used in blown bubble-electrospinning to overcome the surface tension of the polymer bubbles and to pull multiple jets from the broken bubble into nano scale ones wh
Matéria (Rio J.). Publicado em: 2014-12
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19. A crise do sistema financeiro globalizado contemporâneo
The paper analyses the development of the contemporary global financial system as a consequence of markets as well as States strategies. This global financial system based on the flexible dollar has generated many financial bubbles since it started in the 80s, of which the 2008 crisis is the latest and the largest, particularly because it affected the main b
Brazil. J. Polit. Econ.. Publicado em: 2014-09
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20. An animal experimental study of porous magnesium scaffold degradation and osteogenesis
Our objective was to observe the biodegradable and osteogenic properties of magnesium scaffolding under in vivo conditions. Twelve 6-month-old male New Zealand white rabbits were randomly divided into two groups. The chosen operation site was the femoral condyle on the right side. The experimental group was implanted with porous magnesium scaffolds, while th
Braz J Med Biol Res. Publicado em: 2014-08
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21. A (im)previsibilidade da crise e o pluralismo da Economia
The (un)predictability of the crisis and the pluralism in Economics. This paper discusses the predictability of the last global economic crisis relating it to the lack of pluralism in Economics. In order to do so, first is presented a literature review of the development of economic theory in recent years. Then the two main views on the predictability of the
Brazil. J. Polit. Econ.. Publicado em: 2013-12
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22. Bullous Systemic Lupus Erythematosus: case report
INTRODUCTION: Bullous systemic lupus erythematosus (BSLE) is an autoantibody-mediated disease with subepidermal blisters. It is a rare form of presentation of SLE that occurs in less than 5% of cases of lupus. CASE REPORT: A 27-year-old, female, FRS patient reported the appearance of painful bullous lesions in the left nasal wing and left buccal mucosa that
Int. Arch. Otorhinolaryngol.. Publicado em: 2013-09
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23. SIMULATION OF INTERMITTENT FLOW IN VERTICAL PIPES USING THE TWO-FLUID MODEL WITH DIFFERENT CLOSURE PARAMETERS / SIMULAÇÃO DO REGIME INTERMITENTE EM TUBULAÇÕES VERTICAIS UTILIZANDO O MODELO DE DOIS FLUIDOS COM DIFERENTES RELAÇÕES DE FECHAMENTO
Intermittent two phase flows are characterized by a succession of liquid slugs separated by bubbles of different sizes, with varying frequency. The prediction of this type of flow is very important, since it can be found in several industrial applications. In the present work, studies of intermittent flows in vertical pipes are performed, employing the Two F
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/09/2012
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24. Transferência de metano no sentido gás-líquido com vistas ao atendimento da demanda carbonácea da desnitrificação de esgoto sanitário
This work presents a simulation of a hybrid system for waste water treatment, in order to explain the possible use of a carbon supply on denitrification from the methane produced in an anaerobic reactor and transferred to the liquid mass of a reactor that would be removing nitrogen. It was used the biogas produced in a UASB reactor, that passed through a sto
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 31/08/2012