Opacity
Mostrando 25-36 de 295 artigos, teses e dissertações.
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25. PERFORMANCE OF DIESEL ENGINE FUELLED WITH FOUR VEGETABLE OILS, PREHEATED AND AT ENGINE WORKING TEMPERATURE
ABSTRACT With the rise of restrictions imposed by law for gases emission, several technologies both for petrodiesel (PD) or diesel engines are been applied, such as the sulfur reduction and the injection electronic command, followed of gases recirculation and/or after-treatment. The utilization of biofuels is considered as an interesting option for pollutant
Eng. Agríc.. Publicado em: 2017-04
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26. Nanocomposites films obtained from protein isolates of mechanically deboned chicken meat added with montmorillonite
Abstract The aim of this study was to evaluate the properties of nanocomposite films of protein isolates from mechanically deboned chicken meat with organoclay (montmorillonite). For the film development, a 23 experimental design was performed with three levels, protein isolate (2, 3.5, 5 g.100 mL-1 of solution), montmorillonite (0.3, 0.5, 0.7 g.100mL-1 of s
Polímeros. Publicado em: 2017-03
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27. Differential Diagnosis of Solitary Pulmonary Inflammatory Lesions and Peripheral Lung Cancers with Contrast-enhanced Computed Tomography
OBJECTIVES: To clarify differences between solitary pulmonary inflammatory lesions and peripheral lung cancers with contrast-enhanced computed tomography. METHODS: In total, 64 and 132 patients with solitary pulmonary inflammatory masses/nodules and peripheral lung cancers, respectively, were enrolled in this study. Their computed tomographic findings were
Clinics. Publicado em: 2016-10
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28. Nanocellulose Produced from Rice Hulls and its Effect on the Properties of Biodegradable Starch Films
Rice hull is a residue from agro-industry that can be used to produce nanocellulose. We produced nanocellulose from rice hulls through bleaching (with a 5% NaOH solution followed by a peracetic acid solution) and acid hydrolysis at a mild temperature (45ºC) followed by ultrasonication. We investigated the microstructure, crystallinity and thermal stability
Mat. Res.. Publicado em: 12/02/2016
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29. Design of Frequency Selective Band Stop Shield Using Analytical Method
Abstract In this article, a high-order frequency selective band-stop EMC (electromagnetic compatibility) shield is designed using multilayer square loop while each loop resonates at the specific desired frequency. The glass material is picked out as the preferred substrate for the designing process. In contrast to the computationally intensive numerical appr
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 2015-12
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30. Synthesis of Triacetin and Evaluation on Motor
Triacetin (or glycerol triacetate) was obtained by acetylating the glycerol by-product of biodiesel production process. This procedure is an interesting alternative that follows the principles of green chemistry. In this work, triacetin was synthesized using reactions between glycerol and acetic acid, as well as glycerol and acetic anhydride, using homoge
J. Braz. Chem. Soc.. Publicado em: 2015-08
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31. Case-control study for clinical findings on intraocular lens opacity
RESUMO OBJETIVO: Avaliar as características clínicas relacionadas à opacificação tardia de lente intraocular (LIO) acrílica hidrofílica, quatro anos após a cirurgia. MÉTODOS: Foram avaliados seis casos de opacificação tardia de Lentes Intraoculares Ioflex, comparados com 24 pacientes (grupo controle). Ambos os grupos realizaram facoemulsificaç�
MedicalExpress (São Paulo, online). Publicado em: 2014-12
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32. Physical evaluation of biodegradable films of calcium alginate plasticized with polyols
The influence of different polyols as plasticizers of alginate films on their physical attributes like moisture content, soluble mass in water, water uptake, water vapor permeability, opacity and mechanical properties were determined and the results discussed based on scanning electron microscopy observations and glass transition temperature. The alginate fi
Braz. J. Chem. Eng.. Publicado em: 2013-12
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33. Influence of the interposition of ceramic spacers on the degree of conversion and the hardness of resin cements
This study evaluated: I) the effect of photo-activation through ceramics on the degree of conversion (DC) and on the Knoop hardness (KHN) of light- and dual-cured resin cements; and II) two different protocols for obtaining the spectra of uncured materials, to determine the DC of a dual-cured resin cement. Thin films of cements were photo-activated through c
Braz. oral res.. Publicado em: 2013-09
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34. Influence of thickness on properties of plasticized oat starch films
The aim of this study was to investigate the effect of thickness (between 80 and 120 µm) on apparent opacity, water vapor permeability and mechanical properties (tensile and puncture) of oat starch films plasticized with glycerol, sorbitol, glycerol:sorbitol mixture, urea and sucrose. Films were stored under 11, 57, 76 and 90% relative humidity (RH) to stud
Braz. arch. biol. technol.. Publicado em: 2013-08
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35. Effect of the addition of soy lecithin and Yucca schidigera extract on the properties of gelatin and glycerol based biodegradable films
Gelatin-based films containing soy lecithin or Yucca schidigera extract and glycerol as plasticizer were produced by casting and characterized for their mechanical properties, water vapor permeability (WVP), water solubility, opacity and morphology. The addition of glycerol reduced the tensile strength, with a difference of ~ 68% between the values for the m
Polímeros. Publicado em: 11/06/2013
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36. Influence the translucence of glass fiber posts and time of photoactivation of a dual cement bond strength to root dentin / INFLUÊNCIA DA TRANSLUCIDEZ DE PINOS DE FIBRA DE VIDRO E TEMPO DE FOTOATIVAÇÃO DE UM CIMENTO DUAL NA RESISTÊNCIA DE UNIÃO À DENTINA RADICULAR
The aim of this study was to evaluate in vitro through the push-out test, if the use of opaque glass fiber posts (Exacto Angelus [PO]) and translucent (Exacto Translucent Angelus [PT]), adhesively cemented into the root with dual resin cement (Variolink II - Ivoclar Vivadent) under different polymerization time had an influence on the bond strength in three
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 27/02/2012