Results: 64

Microwave-assisted extraction and content determination of astilbin in Lysiphyllum strychnifolium stems

Abstract Lysiphyllum strychnifolium (Craib) A. Schmitz. (in Thai name, Ya nang daeng) has been traditionally used to treat fever, alcohol intoxication, cancer, allergies, and blood toxins. It can be used as a health-promoting herbal tea and contains hydroalcoholic extracts. The purpose of the present stu...

Rapid hemostasis: a novel and effective outpatient procedure using microwave ablation to control epistaxis of isolated mucosal bulge lesions

Abstract Introduction Recurrent epistaxis is commonly encountered in the rhinology outpatient clinic. Under endoscopic guidance, both bipolar cautery and monopolar forceps (combined with suction) have been employed to control the bleeding. However, the use of monopolar forceps requires the placement of ...

Strategies for potential toughening of acrylic denture bases polymerized with microwave energy

Braz. dent. j; 31 (5), 2020
Abstract Thiourethane additives have been shown to improve properties in several dental polymer applications. The aim of this study was to verify the effect of the addition of thiourethane oligomers and acrylamide or isobornyl-based plasticizers on the physical properties of the denture base acrylic resi...

Efeito da polimerização adicional com micro-ondas na rugosidade superficial de duas resinas compostas

RFO UPF; 25 (1), 2020
Introdução: a resina composta é um dos materiais restauradores mais pesquisados na Odontologia, visando melhorias nas suas propriedades e aperfeiçoamento da técnica. Este trabalho tem o objetivo de avaliar a rugosidade superficial de duas resinas compostas, micro-híbrida e nanoparticulada, após a ...

Efecto de cocción en horno convencional y microondas sobre rancidez, pérdida por cocción y diferencia sensorial de hamburguesas

Rev. chil. nutr; 47 (2), 2020
El uso de microondas está muy extendido a nivel doméstico gracias a su rapidez y facilidad de uso. El objetivo del presente trabajo es comparar el efecto de cocción de hamburguesas de distintos tipos de carne, en microondas y en horno convencional, sobre la pérdida de peso y estabilidad oxidativa. Ad...

Resistência à flexão de duas resinas compostas diretas após diferentes métodos de polimerização

RFO UPF; 24 (2), 2019
Objetivo: avaliar a influência de diferentes modos de polimerização sobre a resistência à flexão de três pontos de duas resinas compostas. Métodos: foram confeccionadas 88 amostras, sendo divididas em dois grupos, conforme a resina composta utilizada: Filtek Z350 XT e Forma. Os grupos foram subdi...

Larvicidal effect of Clinopodium macrostemum essential oil extracted by microwave-assisted hydrodistillation against Culex quinquefasciatus (Diptera: Culicidae)

Abstract INTRODUCTION: In the present study, we determined the chemical composition of Clinopodium macrostemum essential oil obtained by microwave-assisted hydrodistillation and its effect on the growth and development of Culex quinquefasciatus mosquito larvae. METHODS: The essential oil compounds wer...

O efeito do envelhecimento por fadiga na microestrutura de cerâmicas y-tzp sinterizadas por energia de micro-ondas

O objetivo deste trabalho foi avaliar o efeito da fadiga na microestrutura de uma cerâmica odontológica (Y-TZP) sinterizada pelo método convencional ou por energia de micro-ondas. A hipótese nula foi que a fadiga não irá gerar alterações na microestrutura deste material. Para isto, foram confecci...

Influence of preheating and post-curing on a novel fiber-reinforced composite post material

Abstract The aim of this study was to investigate the influence of preheating and post-curing methods on diametral tensile strength (DTS), flexural strength (FS), knoop microhardness (KHN), and degree of conversion (DC) of an experimental fiber-reinforced composite (FRC). Specimens (30 wt% of 3-mm-short ...

Porosity, water sorption and solubility of denture base acrylic resins polymerized conventionally or in microwave

J. appl. oral sci; 26 (), 2018
Abstract The proper selection of polymerization cycle is important to prevent overheating of the monomer that could cause degradation, porosity and, consequently, deleterious effects on the denture base properties. Objective This study evaluated the porosity, water sorption and solubility of acrylic res...