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	Provedor de dados PAB (2) Autor Auccaise,Ruben (2) Kwapinski,Witold (2) Novotny,Etelvino Henrique (2) Abreu,Valéria Maria Nascimento (1) Corrêa,Juliano Corulli (1) Duó,Daniele Avilez (1) Higarashi,Martha Mayumi (1) Lemke,Jasmin (1) Linhares,Carolina Rodrigues (1) Rocha,José Dilcio (1) Velloso,Marcia Helena Rodrigues (1) Ziolli,Roberta Lourenço (1) Mais... Palavra-chave Biochar (1) Bone phosphate (1) Chemical oxidation (1) Daphnia similis (1) Fractionation of humic substances (1) Multivariedade curve resolution analysis (1) Nuclear magnetic resonance (1) Phosphate availability (1) Principal component analysis (1) Pyrogenic carbon (1) Pyrolysis (1) Soil fertility (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2012 (2) País Brazil (2) Idioma Inglês (2)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Reproducing the organic matter model of anthropogenic dark earth of Amazonia and testing the ecotoxicity of functionalized charcoal compounds PAB Linhares,Carolina Rodrigues; Lemke,Jasmin; Auccaise,Ruben; Duó,Daniele Avilez; Ziolli,Roberta Lourenço; Kwapinski,Witold; Novotny,Etelvino Henrique. The objective of this work was to obtain organic compounds similar to the ones found in the organic matter of anthropogenic dark earth of Amazonia (ADE) using a chemical functionalization procedure on activated charcoal, as well as to determine their ecotoxicity. Based on the study of the organic matter from ADE, an organic model was proposed and an attempt to reproduce it was described. Activated charcoal was oxidized with the use of sodium hypochlorite at different concentrations. Nuclear magnetic resonance was performed to verify if the spectra of the obtained products were similar to the ones of humic acids from ADE. The similarity between spectra indicated that the obtained products were polycondensed aromatic structures with carboxyl groups: a soil... Tipo: Info:eu-repo/semantics/article Palavras-chave: Daphnia similis; Biochar; Chemical oxidation; Fractionation of humic substances; Nuclear magnetic resonance; Pyrogenic carbon. Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2012000500009 Characterization of phosphate structures in biochar from swine bones PAB Novotny,Etelvino Henrique; Auccaise,Ruben; Velloso,Marcia Helena Rodrigues; Corrêa,Juliano Corulli; Higarashi,Martha Mayumi; Abreu,Valéria Maria Nascimento; Rocha,José Dilcio; Kwapinski,Witold. The objective of this work was to develop an alternative methodology to study and characterize the phosphate crystalline properties, directly associated with solubility and plant availability, in biochar from swine bones. Some phosphate symmetry properties of pyrolyzed swine bones were established, using solid state nuclear magnetic resonance spectroscopy, principal component analysis, and multivariate curve resolution analysis, on four pyrolyzed samples at different carbonization intensities. Increasing carbonization parameters (temperature or residence time) generates diverse phosphate structures, increasing their symmetry and decreasing the crossed polarizability of the pair ¹H-31P, producing phosphates with, probably, lower solubility than the ones... Tipo: Info:eu-repo/semantics/article Palavras-chave: Bone phosphate; Phosphate availability; Principal component analysis; Pyrolysis; Multivariedade curve resolution analysis; Soil fertility. Ano: 2012 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2012000500006 Registros recuperados: 2 Primeira ... 1 ... Última

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