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Autor:
Alisson Lucrécio da Costa, Gabriela Lúcia Pinheiro, Adelir Aparecida Saczk, Carlos Alberto Silva, José Maria de Lima
Publikováno v:
Química Nova v.36 n.3 2013
Química Nova
Sociedade Brasileira de Química (SBQ)
instacron:SBQ
Química Nova, Vol 36, Iss 3, Pp 413-418 (2013)
Química Nova
Sociedade Brasileira de Química (SBQ)
instacron:SBQ
Química Nova, Vol 36, Iss 3, Pp 413-418 (2013)
Determination of organic acids in soils and organic materials is important due to the important role they play in improving the soil's physical, chemical and microbiological conditions. This study identified and quantified low molecular weight organi
Publikováno v:
Química Nova, Volume: 31, Issue: 7, Pages: 1636-1640, Published: 2008
Química Nova v.31 n.7 2008
Química Nova
Sociedade Brasileira de Química (SBQ)
instacron:SBQ
Química Nova v.31 n.7 2008
Química Nova
Sociedade Brasileira de Química (SBQ)
instacron:SBQ
Materials based on pure iron oxide and impregnated with niobia (Nb2O5) were prepared. Their catalytic activities were tested on the oxidation of compounds present in the wastewater from the processing of coffee berries. Particularly caffeine and cate
Autor:
Elisabete Fernandes Albuquerque Palermo, Glaucio Serra, Liliane Siqueira de Morais, Marc A. Meyers, Leonardo R. Andrade, Carlos Alberto Muller, Carlos N. Elias
Publikováno v:
Matéria (Rio de Janeiro). 12:290-297
Mini-implantes ortodônticos de Ti-6Al-4V podem liberar íons metálicos devido à corrosão in vivo da liga em fluidos corporais. Os produtos de corrosão liberados podem favorecer a ocorrência de efeitos indesejáveis no corpo humano. O objetivo d
Autor:
Ignacio González, José L. Nava
Publikováno v:
Química Nova, Vol 28, Iss 5, Pp 901-909 (2005)
Química Nova, Volume: 28, Issue: 5, Pages: 901-909, Published: OCT 2005
Química Nova, Volume: 28, Issue: 5, Pages: 901-909, Published: OCT 2005
This paper shows the applicability of the carbon paste electrode-mineral (CPE-mineral) to study the dissolution mechanisms of minerals in powder form and in flotation concentrates. A potentiodynamic strategy to find the dissolution mechanism of galen
Influência da calcinação sobre a remoção de ferro da caulinita e ilita e seus efeitos sobre a acidez
Publikováno v:
Química Nova, Vol 26, Iss 2, Pp 161-164 (2003)
Samples of natural clay composed by kaolinite, illite, goethite and quartz, were calcinated and submitted to lixiviation with citrate and chloridric acid in order to remove iron. Investigation due to extraction consequences was carried cut by analyzi
Publikováno v:
Química Nova v.25 n.1 2002
Química Nova
Sociedade Brasileira de Química (SBQ)
instacron:SBQ
SciELO
Repositório Institucional da UNESP
Universidade Estadual Paulista (UNESP)
instacron:UNESP
Química Nova
Sociedade Brasileira de Química (SBQ)
instacron:SBQ
SciELO
Repositório Institucional da UNESP
Universidade Estadual Paulista (UNESP)
instacron:UNESP
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Publikováno v:
Química Nova v.24 n.6 2001
Química Nova
Sociedade Brasileira de Química (SBQ)
instacron:SBQ
Química Nova
Sociedade Brasileira de Química (SBQ)
instacron:SBQ
A differential pulse polarographic study with the objective to determine iron (III) in presense of copper (II) in a supporting electrolyte based on citrate - EDTA was made. The best experimental conditions found were a supporting electrolyte of citra
Autor:
Ana Lucia Ramalho Mercê, Bruno Szpoganicz, Erika Fernandes, M.-R. Sierakowski, Antonio S. Mangrich
Publikováno v:
Journal of the Brazilian Chemical Society, Vol 12, Iss 6, Pp 791-798 (2001)
Journal of the Brazilian Chemical Society v.12 n.6 2001
Journal of the Brazilian Chemical Society
Sociedade Brasileira de Química (SBQ)
instacron:SBQ
Journal of the Brazilian Chemical Society, Volume: 12, Issue: 6, Pages: 791-798, Published: DEC 2001
Journal of the Brazilian Chemical Society v.12 n.6 2001
Journal of the Brazilian Chemical Society
Sociedade Brasileira de Química (SBQ)
instacron:SBQ
Journal of the Brazilian Chemical Society, Volume: 12, Issue: 6, Pages: 791-798, Published: DEC 2001
Galactomannans can be employed in food industries to modify the final rheological properties of the products. Since they are not absorbed by the living organisms they can also be used in dietary foods. The equilibria involving the interactions of Fe(
Publikováno v:
Química Nova v.23 n.6 2000
Química Nova
Sociedade Brasileira de Química (SBQ)
instacron:SBQ
Química Nova
Sociedade Brasileira de Química (SBQ)
instacron:SBQ
Speciation studies of Fe, Cr, Co, Ni and Cu on reactive fraction (adsorved on oxides, hydroxides, carbonates and clay minerals) and pyrite were performed in Avicennia schaueriana and Rhizophora mangle sediments from Amapá shoreline-Brazil. The soil