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 Chemical speciation of hexavalent chromium in organic fertilizer by LC-ICP-MS and spectrophotometry. Author(s): SÁ, I. P.; BANHOS, S.; ANDRADE, M. S.; NHAMUE, P. F.; NOGUEIRA, A. R. de A. Normative Instruction n. 7 of 04/12/2016 of the Ministry of Agriculture, Livestock and Food Supply (MAPA) defines the maximum values of contaminants allowed in organic fertilizers and soil conditioner... ... |
 Author(s): OLIVEIRA, L. M. de; GRESS, J.; DE, J.; RATHINASABAPATHI, B.; MARCHI, G.; CHEN, Y.; MA, L. Q. Abstract: We investigated the effects of chromate (CrVI) and sulfate on their uptake and translocation in Ashyperaccumulator Pteris vittata. Plants were exposed to 1) 0.1 mM CrVI and 0, 0.25, 1.25 or... ... |
 Author(s): NOGUEIRA, A. R. de A.; BOSSU, C. M.; OLIVEIRA, M. C. de S.
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 Author(s): MATOS, W. O.; NÓBREGA, J. de A.; SOUZA, G. B. de; NOGUEIRA, A. R. de A. Determination of Cr(VI) and Cr(III) was studied in soil samples accidentally contaminated with sulphochromic solution. Molecular absorption spectrophotometry based on the diphenylcarbazide method was... ... |
 Author(s): PEREZ, D. V.; CAMPOS, R. C. de Size-exclusion chromatography is a powerful tool for distinguishing dissolved organic matter in relation to its molecular size. However, problems may arise in the choice of the most appropriate eluent... ... |
 Author(s): ANDRADE, E. C. B. de; CAMPOS, R. C. de; PEREZ, D. V. The extraction of copper, manganese and zinc by different organic solvents and aqueous solutions from powdered and droughts of nine medicinal plants were investigated as a possible way of accomplishin... ... |
 Author(s): FERREIRA, N. DOS S.; COSTA, P. H. DA; SÁ, I. P. DE; BERNARDO, V. S.; TORRES, F. F.; FIGUEIREDO, J. G.; AMARAL, C. D. B. DO; NOGUEIRA, A. R. de A.; SILVA, D. G. H. DA; GONZALEZ, M. H. The speciation of arsenic in fish has been widely investigated, but bioaccumulation and biotransformation of inorganic As in different tissues of Nile tilapia (Oreochromis niloticus) are not fully und... ... |
 Author(s): RENDÓN-ANAYA, M.; MONTERO-VARGAS, J. M.; SABURIDO-ALVAREZ, S.; VLASOVA, A.; CAPELLA-GUTIERREZ, S.; ORDAZ-ORTIZ, J. J.; AGUILAR, O. M.; VIANELLO, R. P.; SANTALLA, M.; DELAYE, L.; GABALDÓN, T.; GEPTS, P.; WINKLER, R.; GUIGÓ, R.; DELGADO-SALINAS, A.; HERRERA-ESTRELLA, A. Background: Modern civilization depends on only a few plant species for its nourishment. These crops were derived via several thousands of years of human selection that transformed wild ancestors into... ... |
 Author(s): COSTA, N. de L.; JANK, L.; MAGALHAES, J. A.; RODRIGUES, A. N. A.; BENDAHAN, A. B.; GIANLUPPI, V.; RODRIGUES, B. H. N.; SANTOS, F. J. de S. In this work were avaluated the effects of pasture rest periods on forage accumulation, chemical composition and morphogenic and structural characteristics of Megathyrsus maximus cv. Tamani in the Ror... ... |
 Author(s): SILVA, A. R. B. e; CAMILOTTI, F. Introduction; Heavy metals: An overview; Sewage sludge; Heavy metals in soils amended with sewage sludge; Total concentration; Availability; Chemical fractions; Speciation; Risks of contamination; Hea... ... |
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