Liquid Behavior
Mostrando 13-24 de 494 artigos, teses e dissertações.
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13. PHASE BEHAVIOR DATA AND THERMODYNAMIC MODELING OF THE BINARY SYSTEM {CO2 + COUMARIN} AT HIGH PRESSURES
Abstract In this work, vapor - liquid (VLE) equilibrium for the binary system carbon dioxide (1) + coumarin (2) at high pressures was measured by a static synthetic method using a variable-volume view cell. Experimental data were obtained in the temperature range of 318 - 338 K and pressures up to 20 MPa. Coumarin molar fraction ranged from 3.0x10-3 to 6.0x1
Braz. J. Chem. Eng.. Publicado em: 30/09/2019
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14. Kinetic Analysis of Lead Removal by Natural Hydroxyapatite from Aqueous Solution in High Concentration
The aim of this work was to study of the kinetic of Pb(II) sorption, in high lead concentration aqueous solution, by the natural hydroxyapatite (HA) and to verify whether there is a different behavior between natural and synthetic HA under different lead concentrations. Batch experiments were carried out using solutions with high lead concentration, with the
Mat. Res.. Publicado em: 30/09/2019
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15. Variation of the milling conditions in the obtaining of nanocellulose from the paper sludge
ABSTRACT This work aimed to evaluate three different milling conditions, seeking the optimization of CNS isolation process. The paper sludge was chemically treated with detergent and H2O2, by two steps, to remove the noncellulosic contents (hemicellulose and lignin). After these treatments, the sample was milled with the variation of a liquid medium. The thr
Matéria (Rio J.). Publicado em: 16/09/2019
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16. Caracterização microestrutural das ligas AA7004 e AA7075 tixoforjadas em prensa excêntrica
RESUMO Este trabalho tem como objetivo analisar o processo de tixoforjamento em prensa excêntrica das ligas aeronáuticas AA7004 e AA7075 e compreender o comportamento do material semissólido durante o preenchimento da matriz através de análises microestruturais. As ligas foram submetidas a tratamentos térmicos de globularização pelo tempo de 210 s e
Matéria (Rio J.). Publicado em: 16/09/2019
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17. Propolis polyphenolic compounds affect the viability and structure of Helicobacter pylori in vitro
ABSTRACT To evaluate the anti-Helicobacter pylori activity of the major polyphenol compounds of propolis and their cellular damage, both as single molecule or in combination. Honey bees propolis were fractionated by using CPC and preparative HPLC. Four major polyphenols (chrysin, pinocembrin, galangin and caffeic acid phenethyl ester) were identified by thin
Rev. bras. farmacogn.. Publicado em: 26/08/2019
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18. Enhancement the Fatigue Life of Floating Breakwater Mooring System Using Tuned Liquid Column Damper
Abstract Safety is a key design criterion for floating structures. A high rate of mooring accidents has been reported over the past decades. Preventing mooring line failure is a key design objective for floating breakwater systems. The mooring system comprises sets of mooring lines anchored to the seabed. These components are exposed to highly cyclic nonline
Lat. Am. j. solids struct.. Publicado em: 22/08/2019
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19. Procedimentos para análise e validação de atributos da qualidade da água
RESUMO O tratamento incorreto de efluentes líquidos, assim como o seu lançamento inadequado, caracterizam algumas das maiores problemáticas ambientais e pode contribuir para a deterioração dos ecossistemas aquáticos. Nesse contexto, a utilização de modelos de predição possibilita, especialmente no caso de volumes, a observação do comportamento do
Eng. Sanit. Ambient.. Publicado em: 05/08/2019
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20. DEVELOPMENT OF A START-UP OPERATION AND DYNAMIC BEHAVIOR OF A THERMALLY COUPLED EXTRACTIVE DISTILLATION SCHEME
ABSTRACT The startup operation of distillation columns is one of the most complex steps performed in the industry. This complexity becomes even greater for thermally coupled extractive distillation systems. Thermally coupled configurations are commonly used in order to minimize the excessive amount of energy required to perform distillation. In view of this,
Braz. J. Chem. Eng.. Publicado em: 15/07/2019
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21. THERMODYNAMIC ANALYSIS AND MODELING OF BRAZILIAN CRUDE OIL AND ASPHALTENE SYSTEMS: AN EXPERIMENTAL MEASUREMENT AND A PC-SAFT APPLICATION
ABSTRACT Asphaltenes represent the heaviest fraction of crude oils, being recognized by their tendency to self-associate and precipitate. Asphaltene precipitation and subsequent deposition can cause problems in all stages of production. The objective of this paper is to model Brazilian crude oil and asphaltene systems using the PC-SAFT equation of state. Asp
Braz. J. Chem. Eng.. Publicado em: 15/07/2019
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22. New material perspective for endocrown restorations: effects on mechanical performance and fracture behavior
Abstract The aim of this study was to investigate the mechanical performance and the fracture behavior of endocrown restorations prepared using distinct restorative materials. A total of 42 sound molars with similar crown size and shape were cut at 2 mm above the cementoenamel junction and endodontically treated. They were categorized according to the restor
Braz. oral res.. Publicado em: 11/02/2019
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23. Rheological behavior of concentrated tucupi
Abstract Tucupi, which is widely enjoyed in the North region of Brazil, is a fermented liquid derived from cassava (Manihot esculenta Crantz) and has been taken abroad for its exotic characteristics. This study aimed to assess the rheological behavior of tucupi with 30, 35, and 40% solids and concentrated at 50, 70, and 90 °C. The rheological data were obt
Food Sci. Technol. Publicado em: 29/11/2018
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24. Microstructure, Mechanical Properties and in vitro Biological Behavior of Silicon Nitride Ceramics
The bioinert surface of silicon nitride ceramics led us to investigate the additions of SiO2, CaO and Al2O3 in order to aid the liquid phase sintering and improve the mechanical properties and biological behavior of the final materials. The sintered materials reached ca. 97% of theoretical density and total α→β-Si3N4 transformation. The samples had relat
Mat. Res.. Publicado em: 13/09/2018