Fiberglass
Mostrando 1-12 de 94 artigos, teses e dissertações.
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1. Zeólita NaA sintetizada sobre fibra de vidro como estratégia para otimização do abrandamento de águas duras
NaA ZEOLITE SYNTHESIZED OVER FIBERGLASS AS A STRATEGY FOR OPTIMIZING HARD WATER SOFTENING. Zeolite NaA has been successfully synthesized over glass fiber surface previously activated by alkaline treatment. By varying the time of the treatment and the amount of silica and alumina precursors used in the reaction mixture, a sample with higher zeolite concentrat
Química Nova. Publicado em: 2022
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2. Avaliação da concentração e composição inorgânica do material particulado coletado no estado do Rio de Janeiro
Cities urbanization and modernization increase emission sources, contributing to particulate matter (PM) composition heterogeneity and enhance the risk to human health and environment. This paper intends to survey the studies on particulate matter carried out in the state of Rio de Janeiro. The sampling of PM is generally made using Hi-Vol samplers to collec
Quím. Nova. Publicado em: 2021-06
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3. PROCESSING OF A METAL CONCENTRATE FROM GROUND WASTE PRINTED CIRCUIT BOARDS IN ACIDIC MEDIA USING HYDROGEN PEROXIDE AS OXIDANT
The recovery of precious and base metals of a metal concentrate from ground waste printed circuit boards (PCBs) is described in detail. Samples were treated with NaOHaq. to remove the soldering mask. Experiments were performed in acidic medium (HF, H2SO4, CH3COOH or H3PO4) using H2O2 as oxidant. Base metals were leached in high yields (>99 wt.%) at ~40 ºC a
Quím. Nova. Publicado em: 20/07/2020
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4. Evaluation of the effect of chlorhexidine and sodium hypochlorite in adhesive cementation of fiber posts - in vitro study
Resumo Introdução A fixação de pinos de fibra de vidro é realizada através de um processo adesivo. Falhas podem ocorrer na adesão devido à degradação hidrolítica dos adesivos, ou pela degradação das fibras colágenas da camada híbrida por enzimas intrínsecas. Objetivo Avaliar o efeito do tratamento com clorexidina e hipoclorito de sódio sob
Rev. odontol. UNESP. Publicado em: 07/11/2019
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5. Flexural behavior of hybrid GFRP - concrete railway sleepers
Resumo Este trabalho tem por objetivo apresentar o comportamento à flexão de vigas híbridas de GFRP (glass fiber reinforced polymer - polímero reforçado com fibra de vidro) e concreto para aplicação em dormentes ferroviários. Pretendeu-se obter dormentes com adequada resistência mecânica, não susceptíveis à corrosão, duráveis e mais leves que
Rev. IBRACON Estrut. Mater.. Publicado em: 23/09/2019
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6. Estudo da substituição do nylon por compósito de polipropileno com fibra de vidro
RESUMO Peças fabricadas com polímeros de alto desempenho têm sido substituídas por materiais similares, sendo produzidas com uma composição de polipropileno (PP), que tem um custo mais baixo. Uma das composições mais comumente utilizadas é a junção do polipropileno com fibras, resultando na formação de um novo material, com características dife
Matéria (Rio J.). Publicado em: 16/09/2019
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7. Use of intrarradicular pins in primary teeth: case report of one year of accompanying
RESUMO Os dentes decíduos possuem um papel importante no crescimento e desenvolvimento da criança, além de serem importantes para o bom desempenho da função mastigatória, fonação, oclusão e estética, são os melhores mantenedores de espaço e guia de erupção para o sucessor permanente. Para região anterior, existem diferentes alternativas de tra
RGO, Rev. Gaúch. Odontol.. Publicado em: 12/09/2019
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8. A New Conductive Ink for Microstrip Antenna and Bioinspired FSS Designs on Glass and Fiberglass Substrates
Abstract This paper describes an investigation of the possibility of using a new conductive ink, insted of copper clad laminates, in the manufacturing of microstrip patch antennas on glass and fiberglass substrates and of bioinspired frequency selective surfaces (FSSs) on fiberglass substrates for wireless communication systems. The new conductive ink is dev
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 19/06/2019
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9. A New Technique Using Axially Slotted Microstrip Line for Antenna Impedance Matching Designs
Abstract A new technique is presented for designing microstrip patch antennas with very good input impedance matching. The analysis is carried out for 1.78 GHz, 2.42 GHz and 3.46 GHz rectangular patch antennas printed on low-cost fiberglass substrates (FR-4), mounted on a ground plane and fed by a microstrip line. The antenna impedance matching is obtained u
J. Microw. Optoelectron. Electromagn. Appl.. Publicado em: 19/06/2019
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10. How biomechanics can affect the endodontic treated teeth and their restorative procedures?
Abstract: Endodontic treatment is a common dental procedure used for treating teeth which the pulp tissue has become irreversibly inflamed or necrotic as a result of the carious process or dental trauma. This procedure which involves mechanical and chemical preparation of root canal may affect several mechanical and physical properties of the tooth structure
Braz. oral res.. Publicado em: 18/10/2018
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11. Can intra-radicular cleaning protocols increase the retention of fiberglass posts? A systematic review
Abstract The presence of residues within the root canal after post-space preparation can influence the bond strength between resin cement and root dentin when using fiberglass posts (FGPs). Currently, there is no consensus in the literature regarding what is the best solution for the removal of debris after post-space preparation. This systematic review invo
Braz. oral res.. Publicado em: 15/03/2018
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12. Bond strength values of fiberglass post to flared root canals reinforced with different materials
Abstract The aim of this study was to compare in vitro the bond strength (BS) between fiberglass posts and flared root canals reinforced with different materials. The roots of 48 premolars were endodontically treated. After one week, the root canals were prepared to simulate an oversized root canal, except for the positive control group (PCG), which was ceme
Braz. oral res.. Publicado em: 01/03/2018