Zobrazeno 1 - 10
of 63
pro vyhledávání: '"Kleber Franke Portella"'
Autor:
Kleber Franke Portella, Leonardo Evangelista Lagoeiro, Jeferson Luiz Bronholo, Dayane de Cristo Miranda, Mariana D’Orey Gaivão Portella Bragança, Bruna Gomes Dias, Nicole Pagan Hasparyk, Selmo Chapira Kuperman
Publikováno v:
Revista IBRACON de Estruturas e Materiais, Vol 14, Iss 3 (2021)
abstract: This study involved analyzing several natural sands to ascertain the possible causes for distress due to ASR. The analyses were performed using the following techniques: X-ray diffractometry, accelerated mortar bar tests (AMBT), electron ba
Externí odkaz:
https://doaj.org/article/60b11be502a34fedb8c898246f31dead
Autor:
Érico Shooji Oliveira de Andrade Tanobe, Guilherme Silva Cunha, Mariana D'Orey Gaivão Portella Bragança, Kleber Franke Portella, Gilberto Teixeira Carrera
Publikováno v:
LALCA, Vol 3, Iss 0, p e34687 (2019)
In this study, the energy distribution system was evaluated against the durability of materials and its environmental aspects, in relation to the life-cycle assessment (LCA) of electrical insulators of different technologies, analyzing individual per
Externí odkaz:
https://doaj.org/article/11985213aa9c483a9bb6bdb5fbd358b7
Autor:
Kleber Franke Portella, Priscilla Mengarda, Mariana d'Orey Gaivão Portella Bragança, Sebastião Ribeiro Júnior, Jose Sergio Santos de Melo, Dailton Pedreira Cerqueira, Sidnei Antonio Pianaro, Maurício Marlon Mazur
Publikováno v:
Materials Research, Vol 18, Iss 4, Pp 853-859 (2015)
In this study, the cold plasma technique was used to produce nanometric titanium films with hydrophobic and anti-fouling properties. The films where deposited on porcelain electrical insulators surfaces to minimize the effects of leakage current. The
Externí odkaz:
https://doaj.org/article/e702f6f38bcb4e298ad850858a863330
Autor:
Ana Paula Brandão Capraro, Marcelo Henrique Farias de Medeiros, Juarez Hoppe Filho, Mariana Portella Brangança, Kleber Franke Portella, Isabela Cristina Oliveira
Publikováno v:
Revista ALCONPAT, Vol 7, Iss 2 (2017)
El presente trabajo, desarrollado en el ámbito del Programa de P&D ANEEL, proyecto 6491-0301/2013, tiene el objetivo de evaluar cómo las diferentes concentraciones de contaminación por sulfuros interfieren en las características microestructurale
Externí odkaz:
https://doaj.org/article/9d9de56fabe84023b36154c316fdc291
Autor:
Oscar Regis Junior, José Maurílio da Silva, Kleber Franke Portella, Ramon Sigifredo Cortes Paredes
Publikováno v:
Química Nova, Vol 35, Iss 8, Pp 1517-1521 (2012)
An Nb2O|Cu corrosion-resistant coating was developed and applied onto AISI 1020 steel substrate by Powder Flame Spray. A galvanostatic electrochemical technique was employed, with and without ohmic drop, in four different soils (two corrosively aggre
Externí odkaz:
https://doaj.org/article/5b915b2626454e31bc857ba88009e030
Autor:
Kleber Franke Portella, Alex Joukoski, Ariel Scheffer da Silva, Nicole Machuca Brassac, Carlos Eduardo Belz
Publikováno v:
Química Nova, Vol 32, Iss 4, Pp 1047-1051 (2009)
Last decade Brazilian rivers experimented progressive biofouling of Limnoperna fortunei communities and Cordylophora caspia hydroids. The microhabitat is so favorable that in around 1.5 years L. fortunei increased from 0.39 to nearby 149,000 units/m
Externí odkaz:
https://doaj.org/article/ccd7c72bcb8649d98af2f49f78ce14a2
Autor:
Camila Freitas, José Carlos Alves Galvão, Kleber Franke Portella, Alex Joukoski, Carlos Vicente Gomes Filho, Elizeu Santos Ferreira
Publikováno v:
Química Nova, Vol 32, Iss 4, Pp 913-918 (2009)
Physicochemical and mechanical techniques were carried out to characterize three concrete tyre-rubber waste dosages such as 5, 10 and 15%, w/w. The elastomeric material was identified as styrene-butadiene rubber (SBR). It was observed that the growin
Externí odkaz:
https://doaj.org/article/7b8a0da7847d45039020049c57b46516
Autor:
Kleber Franke Portella, Fernando Piazza, Paulo Cesar Inone, Sebastião Ribeiro Jr, Mário Seixas Cabussú, Dailton Pedreira Cerqueira, Cleuber Sobreira da Silva Chaves
Publikováno v:
Química Nova, Vol 31, Iss 2, Pp 340-348 (2008)
The performances of eight kinds of insulators from electrical distribution lines in Salvador-BA, Brazil, were evaluated considering the chemical and physical local environmental pollution. The parameters that were chosen as characteristic for the ins
Externí odkaz:
https://doaj.org/article/dcfddbb5c7dd427f8ab98b5ddf231174
Autor:
Kleber Franke Portella, Carlos Mario Garcia, Giseli Ribeiro Vergés, Alex Joukoski, Karla Regina Rattmann Freire, Alcyr de Pinho Corrêa
Publikováno v:
Química Nova, Vol 29, Iss 4, Pp 724-734 (2006)
The influence of natural aging furthered by atmospheric corrosion of parts of electric transformers and materials, as well as of concrete poles and cross arms containing corrosion inhibitors was evaluated in Manaus. Results for painted materials, it
Externí odkaz:
https://doaj.org/article/a79916a070fe46e3ac28946c4bcd420f
Autor:
Sofia Araújo Lima, Almir Sales, Fernando do Couto Rosa Almeida, Juliana Petermann Moretti, Kleber Franke Portella
Publikováno v:
Ambiente Construído, Vol 11, Iss 2, Pp 201-212
O bagaço é gerado como resíduo do processamento do açúcar e do álcool. Esse resíduo é utilizado para a cogeração de energia por meio da queima em caldeiras, restando ao final as cinzas residuais do bagaço da cana-de-açúcar (CBC). Atualme
Externí odkaz:
https://doaj.org/article/2abb327c64af431eb893704c6e5b3e2f