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Registro Completo |
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Biblioteca(s): |
Embrapa Trigo. |
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Data corrente: |
24/03/1999 |
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Data da última atualização: |
09/09/2015 |
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Autoria: |
ALMEIDA, J. L.; ARIAS, G.; BLUM, M. M. C.; MINELLA, E.; RUPPEL, E. C.; SÓ e SILVA, M. |
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Afiliação: |
1, 5 FAPA. Vitoria-Entre Rios, Guarapuava; 2, 4, 6, Embrapa Trigo; 3 Cooperativa Agrária Mista Entre Rios Ltda. Vitoria-Entre Rios, Guarapuava. |
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Título: |
Ensaio intermediário de cevada, Entre Rios - 1997. |
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Ano de publicação: |
1998 |
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Fonte/Imprenta: |
In: REUNIÃO ANUAL DE PESQUISA DE CEVADA, 18., 1998, Passo Fundo. Anais. Passo Fundo: EMBRAPA-CNPT, 1998. |
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Páginas: |
p. 91-95 |
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Idioma: |
Português |
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Thesaurus Nal: |
barley. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 00559naa a2200193 a 4500
001 1824981
005 2015-09-09
008 1998 bl uuuu u00u1 u #d
100 1 $aALMEIDA, J. L.
245 $aEnsaio intermediário de cevada, Entre Rios - 1997.
260 $c1998
300 $ap. 91-95
650 $abarley
700 1 $aARIAS, G.
700 1 $aBLUM, M. M. C.
700 1 $aMINELLA, E.
700 1 $aRUPPEL, E. C.
700 1 $aSÓ e SILVA, M.
773 $tIn: REUNIÃO ANUAL DE PESQUISA DE CEVADA, 18., 1998, Passo Fundo. Anais. Passo Fundo: EMBRAPA-CNPT, 1998.
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Registro original: |
Embrapa Trigo (CNPT) |
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 | Acesso ao texto completo restrito à biblioteca da Embrapa Instrumentação. Para informações adicionais entre em contato com cnpdia.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
12/08/2004 |
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Data da última atualização: |
11/09/2007 |
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Autoria: |
LEITE, F. de L.; CUNHA, T. J. F. da; MARTIN-NETO, L.; MADARI, B.; SANTOS, G. A.; MATTOSO, L. H. C.; HERRMANN, P. S. de P. |
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Título: |
Study of amazon antropogenic humic acid by Atomic Force Microscopy (AFM). |
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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. 318-320. |
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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) play important rule on many aspects of the nature of soil and environmental processes. Humic Substances (HS) are the major organic constituents of soils and aquatic environments and are generated by the microbiological and chemical degradation and transformation of organic matter resulting in chemical structures which are more stable than the starting material (Steverson, 1982). Various studies in the Brazilian Amazon mention the existence of soils having an anthropogenic A horizon (Cunha et al., 2001). These soils, ofien referred to as Amazonian dark earth (or "Terra Preta"), present particular physical and chemical properties. The organic matter present in these soil show high stability and reactivity characteristics (Glaser et al., 2000). The origin of this organic matter is thought to be mostly pyrogenic and is in relation to the domestic/agricultural activity of pre-Columbian populations that colonized the Amazon basin since 3000 B.C. (Denevan, 2001). Because of its high fertility compared to the adjacent soils, it is has been frequently used by
recent populations of lhe Amazon for subsistence agriculture (beans, corn etc.) and/or for production for market sale of a high diversity of products (papaya, coconut, cupuaçu etc.). Since, a better understanding of HS structures would help to determine their origin and genesis reactivity, and role in environmental processes, lhe objective this work was to study lhe Humic Acid (HA) with selected methods in the compared to an adjacent soil that did not have anthropogeni A horizon, using an Atomic Force Microscope (AFM). The purpose of our investigation was to obtain a better understanding of morphology, adsorption and orientation of HA molecules on mica from anthropogenic HA. This microscope can image surfaces with atomic resolution by scanning a sharp tip across the surface at forces smaller than the forces between atoms (Leite et al., 2003). AFM is a scanning probe technique, which has been employed to study the morphologies of humic and fulvic (Plaschke et al., 2002, 1999; Mertig et al., 1999) and it is a powerful tool to characterize small colloids, as well as colloid agglomeration, adsorption onto surfaces, or modification in the morphologies affected by changes in the physical-chemistry properties. MenosI. INTRODUCTION
Soil Organic Matter (SOM) play important rule on many aspects of the nature of soil and environmental processes. Humic Substances (HS) are the major organic constituents of soils and aquatic environments and are generated by the microbiological and chemical degradation and transformation of organic matter resulting in chemical structures which are more stable than the starting material (Steverson, 1982). Various studies in the Brazilian Amazon mention the existence of soils having an anthropogenic A horizon (Cunha et al., 2001). These soils, ofien referred to as Amazonian dark earth (or "Terra Preta"), present particular physical and chemical properties. The organic matter present in these soil show high stability and reactivity characteristics (Glaser et al., 2000). The origin of this organic matter is thought to be mostly pyrogenic and is in relation to the domestic/agricultural activity of pre-Columbian populations that colonized the Amazon basin since 3000 B.C. (Denevan, 2001). Because of its high fertility compared to the adjacent soils, it is has been frequently used by
recent populations of lhe Amazon for subsistence agriculture (beans, corn etc.) and/or for production for market sale of a high diversity of products (papaya, coconut, cupuaçu etc.). Since, a better understanding of HS structures would help to determine their origin and genesis reactivity, and role in environmental processes, lhe objective this work was to study lhe Humic Acid (HA) with... Mostrar Tudo |
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Palavras-Chave: |
Amazon; anthropogenic soils; Humic acid. |
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Thesaurus NAL: |
atomic force microscopy. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 03211naa a2200253 a 4500
001 1028564
005 2007-09-11
008 2004 bl --- 0-- u #d
100 1 $aLEITE, F. de L.
245 $aStudy of amazon antropogenic humic acid by Atomic Force Microscopy (AFM).
260 $c2004
500 $aCLASSIFICAÇÃO CDD: 630
520 $aI. INTRODUCTION Soil Organic Matter (SOM) play important rule on many aspects of the nature of soil and environmental processes. Humic Substances (HS) are the major organic constituents of soils and aquatic environments and are generated by the microbiological and chemical degradation and transformation of organic matter resulting in chemical structures which are more stable than the starting material (Steverson, 1982). Various studies in the Brazilian Amazon mention the existence of soils having an anthropogenic A horizon (Cunha et al., 2001). These soils, ofien referred to as Amazonian dark earth (or "Terra Preta"), present particular physical and chemical properties. The organic matter present in these soil show high stability and reactivity characteristics (Glaser et al., 2000). The origin of this organic matter is thought to be mostly pyrogenic and is in relation to the domestic/agricultural activity of pre-Columbian populations that colonized the Amazon basin since 3000 B.C. (Denevan, 2001). Because of its high fertility compared to the adjacent soils, it is has been frequently used by recent populations of lhe Amazon for subsistence agriculture (beans, corn etc.) and/or for production for market sale of a high diversity of products (papaya, coconut, cupuaçu etc.). Since, a better understanding of HS structures would help to determine their origin and genesis reactivity, and role in environmental processes, lhe objective this work was to study lhe Humic Acid (HA) with selected methods in the compared to an adjacent soil that did not have anthropogeni A horizon, using an Atomic Force Microscope (AFM). The purpose of our investigation was to obtain a better understanding of morphology, adsorption and orientation of HA molecules on mica from anthropogenic HA. This microscope can image surfaces with atomic resolution by scanning a sharp tip across the surface at forces smaller than the forces between atoms (Leite et al., 2003). AFM is a scanning probe technique, which has been employed to study the morphologies of humic and fulvic (Plaschke et al., 2002, 1999; Mertig et al., 1999) and it is a powerful tool to characterize small colloids, as well as colloid agglomeration, adsorption onto surfaces, or modification in the morphologies affected by changes in the physical-chemistry properties.
650 $aatomic force microscopy
653 $aAmazon
653 $aanthropogenic soils
653 $aHumic acid
700 1 $aCUNHA, T. J. F. da
700 1 $aMARTIN-NETO, L.
700 1 $aMADARI, B.
700 1 $aSANTOS, G. A.
700 1 $aMATTOSO, L. H. C.
700 1 $aHERRMANN, P. S. de P.
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. 318-320.
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