Zobrazeno 1 - 10
of 50
pro vyhledávání: '"Boaventura Freire dos Reis"'
Autor:
Manoel de Jesus de Aquino Lima, Quésia Guedes da Silva Castilho, Ridvan Nunes Fernandes, Auro Atsushi Tanaka, Boaventura Freire dos Reis
Publikováno v:
Química Nova, Vol 39, Iss 5, Pp 592-597 (2016)
This paper describes a procedure based on multicommutation in flow analysis system for photometric determination of hydroquinone in pharmaceutical gel formulations. The procedure involves oxidation of hydroquinone by Fe (III) and subsequent reaction
Externí odkaz:
https://doaj.org/article/eaaee2f5a3834ab3b9004c8ceb55a816
Publikováno v:
Química Nova, Vol 28, Iss 3, Pp 414-420 (2005)
Automatic flow procedures based on the multicommutation concept, dedicated to the determination of 3-hydroxybutyrate, glucose and cholesterol are proposed. The enzymes were immobilized on glass beads and packed into mini-columns that were coupled to
Externí odkaz:
https://doaj.org/article/fcd00b9f36a44037ad1ba212f6ff5dfd
Publikováno v:
Química Nova, Vol 25, Iss 6a, Pp 931-934 (2002)
An automatic flow injection procedure for spectrophotometric aluminium determination in purified water and solutions containing high salts concentrations used for hemodyalisis treatment was developed. The method was base on reaction of Al3+ with cian
Externí odkaz:
https://doaj.org/article/25a0fb0468f149f383204b1c5a3228d9
Publikováno v:
Scientia Agricola, Vol 59, Iss 2, Pp 251-256 (2002)
A concentração de proteína total em plasma é um parâmetro utilizado no controle da saúde e nutrição animal, sendo que a faixa de concentração considerada normal para animais em bom desenvolvimento situa-se entre 60 e 85 g L -1. Os métodos
Externí odkaz:
https://doaj.org/article/1d48cd473fa44017bdd62c4d9665ac01
Autor:
Ana Paula G. Gervasio, Boaventura Freire dos Reis, Maria Fernanda Giné, Henrique Bergamin Filho
Publikováno v:
Química Nova, Vol 23, Iss 4, Pp 482-486 (2000)
Externí odkaz:
https://doaj.org/article/b2399639ce9c4416b28bdf9853acc36c
Autor:
Ana Paula G. Gervasio, Gilmara Caseri de Luca, Amauri Antonio Menegário, Henrique Bergamin Filho, Boaventura Freire dos Reis, Ivan Gonçalves de Souza
Publikováno v:
Química Nova, Vol 22, Iss 5, Pp 669-673 (1999)
An on-line electrodissolution procedure implemented in a flow injection system for determination of copper, zinc and lead in brasses alloys by ICP-AES is described. Sample dissolution procedure was carried out by using a PTFE chamber and a DC power s
Externí odkaz:
https://doaj.org/article/142e80ada2b64371a94c44f7aed6c1d9
Autor:
Eloisa Ap. Mocheuti Kronka, Boaventura Freire dos Reis, Jonas A. Vieira, Telma Blanco, Ana Paula G. Gervasio
Publikováno v:
Química Nova, Vol 20, Iss 4, Pp 372-376 (1997)
A flow system based on multicommutation and binary sampling process was developed to implement the sample zone trapping technique in order to increase the spectrophotometric analytical range and to improve sensitivity. The flow network was designed w
Externí odkaz:
https://doaj.org/article/fecabb284da04a459ede295e2af52d6d
Autor:
Felisberto Gonçalves Santos, Fernando Maya, Boaventura Freire dos Reis, Elias Ayres Guidetti Zagatto, Víctor Cerdà
Publikováno v:
Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual)
Universidade de São Paulo (USP)
instacron:USP
Universidade de São Paulo (USP)
instacron:USP
A lab-in-syringe flow system exploiting dispersive liquid-liquid micro-extraction in a solvent lighter than water is proposed for the spectrophotometric determination of lead in industrial residual waters. The steps inherent to both liquid-liquid ext
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dde818e1f8c178078e0e73e36181f888
https://pubmed.ncbi.nlm.nih.gov/35594833
https://pubmed.ncbi.nlm.nih.gov/35594833
Autor:
Boaventura Freire dos Reis
Publikováno v:
Holos Environment. 5
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::5da0248a6c3feb90f671acf8874337d4
https://doi.org/10.14295/holos.v5i2.314
https://doi.org/10.14295/holos.v5i2.314
Autor:
Adilson Gonzaga
Publikováno v:
Biblioteca Digital de Teses e Dissertações da USP
Universidade de São Paulo (USP)
instacron:USP
Universidade de São Paulo (USP)
instacron:USP
Apresentamos neste trabalho o desenvolvimento de um método para o reconhecimento do Formato de Objetos Tri-dimensionais. Os sistemas tradicionais de Visão Computacional empregam imagens bi-dimensionais obtidos através de câmeras de TV, ricas em d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::a1c8b075ef86911e4698dcf6a0d704e9
https://doi.org/10.11606/t.54.2009.tde-16042009-102057
https://doi.org/10.11606/t.54.2009.tde-16042009-102057
