Zobrazeno 1 - 10
of 141
pro vyhledávání: '"Julio Cesar ROCHA"'
Autor:
Julio Cesar Rocha
Publikováno v:
Eclética Química, Vol 13, Iss 1, Pp 71-79 (2018)
Externí odkaz:
https://doaj.org/article/4bd692f9ff5947cba324894e6f224221
Método modificado para determinação de mercúrio por espectrofotometria de absorção atômica sem chama
Autor:
Julio Cesar Rocha
Publikováno v:
Eclética Química, Vol 19, Iss 1, Pp 119-127 (2018)
Externí odkaz:
https://doaj.org/article/1927a7ef4bc74f5189afff6df1a859f3
Autor:
Julio Cesar Rocha
Publikováno v:
Eclética Química, Vol 18, Iss 1, Pp 83-92 (2018)
Externí odkaz:
https://doaj.org/article/d7c5e42715bf4fe68327e38a1f246167
Autor:
Julio Cesar Rocha
Publikováno v:
Eclética Química, Vol 19, Iss 1, Pp 105-117 (2018)
Externí odkaz:
https://doaj.org/article/fe149992876c43e0ab31d9cc40ca06fd
Autor:
Natália Noronha Ferreira, Ademir dos Santos, Maria Lucia Ribeiro, Luciana Camargo de Oliveira, Wander Gustavo Botero, Julio Cesar Rocha
Publikováno v:
Revista Brasileira Multidisciplinar - ReBraM /Brazilian Multidisciplinay Journal, Vol 12, Iss 2, Pp 205-226 (2015)
Humic substances (HS) are heterogeneous molecular aggregates, which have no defined structure and constitute the principal fraction of natural organic matter. They can act as complexation agents, due to their high density of functional groups, and th
Externí odkaz:
https://doaj.org/article/2ee8fa0fa3e9490aabedce6a97cfbf5d
Autor:
Ademir dos SANTOS, Maria Olímpia de Oliveira REZENDE, André Henrique ROSA, Luiz Fabrício ZARA, Julio Cesar ROCHA
Publikováno v:
Eclética Química, Vol 27, Iss 1 (2018)
Estudou-se a distribuição de Cr, Ni, Cu, Cd e Pb em frações de substâncias húmicas (SH) de diferentes tamanhos moleculares. As SH foram extraídas de amostras de água (SHA) e de sedimentos de superfície (SHSS), interface/água (SHSI) e fundo
Externí odkaz:
https://doaj.org/article/e5655e3ba8b944cbb613aa4b0ccb00f7
Publikováno v:
Eclética Química, Vol 27, Iss 2 (2018)
This paper describes the reduction of Cr(VI) to Cr(III) using a new support prepared by activation of aminopropyl silica with aquatic humic substances (ATPS-SiO2-AHS). It were collected water samples from Córrego Itapitangui, Iguape, São Paulo Stat
Externí odkaz:
https://doaj.org/article/9643e7c1431d4e11817109ca92216afe
Autor:
Mirela Cristina de Oliveira Cordovil, André Gustavo Ribeiro Mendonça, Wander Gustavo Botero, Ademir dos Santos, Julio Cesar Rocha, Kaline de Mello, Rogério Hartung Toppa, Luciana Camargo de Oliveira
Publikováno v:
Química Nova, Vol 37, Iss 5, Pp 770-775 (2014)
This study used chemometric tools and a Geographic Information System (GIS) to determine the influence of organic matter and anthropogenic activity on the distribution of metal species between two major communities of the Middle Negro River Basin-AM.
Externí odkaz:
https://doaj.org/article/0c65fbefbd314a66a0f60d6e355041d8
Autor:
Danielle Goveia, Julio Cesar Rocha, Luciana Camargo de Oliveira, Leandro Cardoso de Morais, Valquiria de Campos, Leonardo Fernandes Fraceto, André Henrique Rosa
Publikováno v:
Química Nova, Vol 34, Iss 5, Pp 753-758 (2011)
The knowledge of the structure characteristic of the Organic Matter is important for the understanding of the natural process. In this context aquatic humic substances (principal fraction) were isolated from water sample collected from the two distin
Externí odkaz:
https://doaj.org/article/7a5456102485443ab0e01ab0c6e95713
Autor:
Luciana Camargo de Oliveira, Wander Gustavo Botero, Ademir dos Santos, Mirela Cristina de Oliveira Cordovil, Julio Cesar Rocha, Heliandro Cordovil da Silva
Publikováno v:
Química Nova, Vol 34, Iss 8, Pp 1303-1308 (2011)
The region of Aracá River (Middle and Upper Rio Negro-AM) has peculiar characteristics, having soils with atypical profile and high organic matter contents in great deep. The levels of aluminum and iron in the soil samples increased as a function of
Externí odkaz:
https://doaj.org/article/a558e308fedf4a25adfe672122d340fc