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Registro Completo |
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
13/08/2004 |
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Data da última atualização: |
01/03/2010 |
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Autoria: |
GALETI, H. V. A.; MILORI, D. M. B. P.; CUNHA, T. J. F.; MARTIN-NETO, L.; MADARI, B.; BENITES, V. de M.; SANTOS, G. de A. |
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Título: |
Analysis of concentration effect on laser-induced fluorescece of humic acids in solid samples. |
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Ano de publicação: |
2004 |
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Fonte/Imprenta: |
In: MARTIN-NETO, L.; MILORI, D.M.B.P.; SILVA, W.T.L. (Ed.). Humic substances and soil and water environment: International Meeting of IHSS, 12. São Carlos : Embrapa Instrumentação Agropecuária, 2004. p. 332-334. |
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Idioma: |
Inglês |
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Notas: |
CLASSIFICAÇÃO CDD: 630 |
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Conteúdo: |
I. INTRODUCTION
Soil organic matter (SOM) is constituted of, basically, two types of substances: humic (humic acid (HA), fulvic acid (FA) and humin (H)) and non humic (proteins, amino acids, polysaccharides, organic acid of low molecular weight, waxes and others). The humic substances (HS) are the most recalcitrant components of soil organic matter, and they are constituted of an heterogeneous mixture of functional groups. These are formed during the humification process, which modilies chemical structures of OM through the degradation of organic residues, being controlled through variables such as temperature, soil water regime, pH and free nutrients. The study of SOM, in particular of the
HS, has shown necessary and very important to understand mechanisms of its formation and stabilization. Its characterization is relevant because it has a function in the productivity and structure of soil.
Spectroscopic techniques which make possible studies of OM near natural situation are interesting, mainly if they work with low negative interference of intrinsic components of this material, such as metals. In this direction, a new technique has being applied: Laser-lnduced Fluorescence (LIF) spectroscopy. This technique presents, in recent and preliminary results, an indicative of high potential to evaluate humification degree of OM in whole soil through a relatively simple methodology.
However, physical and chemical parameters generate effects that inlluence the LIF. These , effects are not known yet, as well as the parameters which generate them. The concentration is a parameter that affects the LIF intensity, and can easily be controlled in laboratory. The goal of this work is to understand the dependence of soil HA fluorescence as a function of concentration, to evaluate which range of organic matter concentration the methodology can be applied. MenosI. INTRODUCTION
Soil organic matter (SOM) is constituted of, basically, two types of substances: humic (humic acid (HA), fulvic acid (FA) and humin (H)) and non humic (proteins, amino acids, polysaccharides, organic acid of low molecular weight, waxes and others). The humic substances (HS) are the most recalcitrant components of soil organic matter, and they are constituted of an heterogeneous mixture of functional groups. These are formed during the humification process, which modilies chemical structures of OM through the degradation of organic residues, being controlled through variables such as temperature, soil water regime, pH and free nutrients. The study of SOM, in particular of the
HS, has shown necessary and very important to understand mechanisms of its formation and stabilization. Its characterization is relevant because it has a function in the productivity and structure of soil.
Spectroscopic techniques which make possible studies of OM near natural situation are interesting, mainly if they work with low negative interference of intrinsic components of this material, such as metals. In this direction, a new technique has being applied: Laser-lnduced Fluorescence (LIF) spectroscopy. This technique presents, in recent and preliminary results, an indicative of high potential to evaluate humification degree of OM in whole soil through a relatively simple methodology.
However, physical and chemical parameters generate effects that inlluence the LIF. These , effe... Mostrar Tudo |
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Palavras-Chave: |
fluorescence spectroscopy; laser. |
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Thesaurus Nal: |
humic substances; soil organic matter. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02779naa a2200253 a 4500
001 1028588
005 2010-03-01
008 2004 bl --- 0-- u #d
100 1 $aGALETI, H. V. A.
245 $aAnalysis of concentration effect on laser-induced fluorescece of humic acids in solid samples.
260 $c2004
500 $aCLASSIFICAÇÃO CDD: 630
520 $aI. INTRODUCTION Soil organic matter (SOM) is constituted of, basically, two types of substances: humic (humic acid (HA), fulvic acid (FA) and humin (H)) and non humic (proteins, amino acids, polysaccharides, organic acid of low molecular weight, waxes and others). The humic substances (HS) are the most recalcitrant components of soil organic matter, and they are constituted of an heterogeneous mixture of functional groups. These are formed during the humification process, which modilies chemical structures of OM through the degradation of organic residues, being controlled through variables such as temperature, soil water regime, pH and free nutrients. The study of SOM, in particular of the HS, has shown necessary and very important to understand mechanisms of its formation and stabilization. Its characterization is relevant because it has a function in the productivity and structure of soil. Spectroscopic techniques which make possible studies of OM near natural situation are interesting, mainly if they work with low negative interference of intrinsic components of this material, such as metals. In this direction, a new technique has being applied: Laser-lnduced Fluorescence (LIF) spectroscopy. This technique presents, in recent and preliminary results, an indicative of high potential to evaluate humification degree of OM in whole soil through a relatively simple methodology. However, physical and chemical parameters generate effects that inlluence the LIF. These , effects are not known yet, as well as the parameters which generate them. The concentration is a parameter that affects the LIF intensity, and can easily be controlled in laboratory. The goal of this work is to understand the dependence of soil HA fluorescence as a function of concentration, to evaluate which range of organic matter concentration the methodology can be applied.
650 $ahumic substances
650 $asoil organic matter
653 $afluorescence spectroscopy
653 $alaser
700 1 $aMILORI, D. M. B. P.
700 1 $aCUNHA, T. J. F.
700 1 $aMARTIN-NETO, L.
700 1 $aMADARI, B.
700 1 $aBENITES, V. de M.
700 1 $aSANTOS, G. de A.
773 $tIn: MARTIN-NETO, L.; MILORI, D.M.B.P.; SILVA, W.T.L. (Ed.). Humic substances and soil and water environment: International Meeting of IHSS, 12. São Carlos : Embrapa Instrumentação Agropecuária, 2004. p. 332-334.
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Registro original: |
Embrapa Instrumentação (CNPDIA) |
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| Registros recuperados : 10 | |
| 1. |  | MILORI, D. M. B. P.; GALETI, H. V. A.; MARTIN-NETO, L.; BAYER, C.; SALTON, J.; GONZÁLES-PÉREZ, M. Humification degree of organic matter in whole soil determined by laser-induced fluorescence. In: INTERNATIONAL MEETING OF INTERNATIONAL HUMIC SUBSTANCES SOCIETY. -- IHSS, 12, São Pedro, SP, 2004. Humic substances and soil and water environment. Abstracts...[São Carlos], SP: Embrapa Instrumentação Agropecuária, 2004. p. 61.| Biblioteca(s): Embrapa Instrumentação. |
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| 2. | | GALETI, H. V. A.; MILORI, D. M. B. P.; CUNHA, T. J. F.; MARTIN-NETO, L.; MADARI, B.; BENITES, V. de M.; SANTOS, G. de A. Analysis of concentration effect on laser-induced fluorescece of humic acids in solid samples. In: MARTIN-NETO, L.; MILORI, D.M.B.P.; SILVA, W.T.L. (Ed.). Humic substances and soil and water environment: International Meeting of IHSS, 12. São Carlos : Embrapa Instrumentação Agropecuária, 2004. p. 332-334. CLASSIFICAÇÃO CDD: 630| Biblioteca(s): Embrapa Instrumentação. |
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| 3. | | MILORI, D. M. B. P.; MARTIN-NETO, L.; GALETI, H. V. A.; BENITES, V. DE M.; MADARI, B.; CUNHA, T. J. F.; SANTOS, G. DE A. Analysis of concentration effect on laser-induced fluorescence of humic acids in solid samples. In: INTERNATIONAL MEETING OF INTERNATIONAL HUMIC SUBSTANCES SOCIETY. -- IHSS, 12, São Pedro, SP, 2004. Humic substances and soil and water environment. Abstracts...[São Carlos], SP: Embrapa Instrumentação Agropecuária, 2004. p. 57.| Biblioteca(s): Embrapa Instrumentação. |
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| 4. | | MILORI, D. M. B. P.; MARTIN-NETO, L.; GALETI, H. V. A.; GONZALÉZ PÉREZ, M.; BAYER, C.; MIELNICZUK, J.; SALTON, J. Índice de humidificação obtido através da fluorescência induzida por lazer. São Carlos, SP: Embrapa Instrumentação Agropecuária, 2004. 17 p. (Embrapa Instrumentação Agropecuária. Boletim de Pesquisa e Desenvolvimento, 07).| Biblioteca(s): Embrapa Instrumentação. |
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| 5. | | MILORI, D. M. B. P.; MARTIN-NETO, L.; GALETI, H. V. A.; GONZALÉZ PÉREZ, M.; BAYER, C.; MIELNICZUK, J.; SALTON, J. C. Índice de humidificação obtido através da fluorescência induzida por lazer. São Carlos, SP: Embrapa Instrumentação Agropecuária, 2004. 17 p. (Embrapa Instrumentação Agropecuária. Boletim de pesquisa e desenvolvimento, 7).| Tipo: Boletim de Pesquisa e Desenvolvimento |
| Biblioteca(s): Embrapa Agropecuária Oeste. |
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| 6. | | ANTONIO, V. Z.; SANTOS, C. H. dos; MILORI, D. M. B. P.; MARTIN-NETO, L.; GALETI, H. V. A.; SILVA, W. T. L.; MELO, W. J. Caracterização espectroscópica de frações químicas de substâncias húmicas extraídas de solos representativos do Estado de São Paulo. In: ENCONTRO BRASILEIRO DE SUBSTÂNCIAS HÚMICAS, 6., 2005, Rio de Janeiro. Resumos expandidos... Rio de Janeiro: EMBRAPA Solos, 2005. p.185-188.| Biblioteca(s): Embrapa Instrumentação. |
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| 7. | | SANTOS, L. M.; NARIMOTO, K. M.; GALETI, H. V. A.; PARABOCZ, V.; SILVA, W. T. L.; MILORI, D. M. B. P.; MELO, W. J.; MARTIN NETO, L. Caracterização de amostras de solos submetidos à adição de lodo de esgoto utilizando fluorescência induzida por laser (fil). In: LATIN AMERICAM SYMPOSIUM ON SCANNING PROBE MICROSCOPY, 3., 2005, Ouro Preto. [Anais eletrônicos...]. Ouro Preto: SBMN, 2005. 1 CD-ROM.| Biblioteca(s): Embrapa Instrumentação. |
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| 8. | | SANTOS, C. H.; MILORI, D. M. B. P.; NARIMOTO, K. M.; MARTIN-NETO, L.; ANTONIO, V. Z.; GALETI, H. V. A. SILVA, W. T. L.; BAYER, C. Correlação entre a acidez carboxílica e o grau de humificação de ácidos húmicos. In: ENCONTRO BRASILEIRO DE SUBSTÂNCIAS HÚMICAS, 6., 2005, Rio de Janeiro. Resumos expandidos... Rio de Janeiro: EMBRAPA Solos, 2005. p. 241-244.| Biblioteca(s): Embrapa Instrumentação. |
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| 9. | | SEGNINI, A.; SIMOES, M. L.; SILVA, W. T. L. da; MILORI, D. M. B. P.; GALETI, H. V. A.; CERDEIRA, A. L.; BOLONHEZI, D.; MARTIN-NETO, L. Evaluation of carbon sequestration in Brazilian Area of sugar-cane under different Tillage Systems. In: MARTIN-NETO, L.; MILORI, D.M.B.P.; SILVA, W.T.L. (Ed.). Humic substances and soil and water environment: International Meeting of IHSS, 12. São Carlos : Embrapa Instrumentação Agropecuária, 2004. p. 14-16. CLASSIFICAÇÃO CDD: 630| Tipo: Artigo em Anais de Congresso |
| Biblioteca(s): Embrapa Instrumentação; Embrapa Meio Ambiente. |
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| 10. | | MILORI, D. M. B. P.; GALETI, H. V. A.; SANTOS, C. H.; MARTIN-NETO, L.; ANTONIO, V. Z.; BAYER, C.; MELO, W. J. de. Fluorescência induzida por laser aplicada a análises de diferentes tipos de solos brasileiros. In: ENCONTRO BRASILEIRO DE SUBSTÂNCIAS HÚMICAS, 6., 2005, Rio de Janeiro. Resumos expandidos... Rio de Janeiro: EMBRAPA Solos, 2005. p. 223-226.| Biblioteca(s): Embrapa Instrumentação. |
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| Registros recuperados : 10 | |
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| Nenhum registro encontrado para a expressão de busca informada. |
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