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Registros recuperados : 332 | |
26. | ![Imagem marcado/desmarcado](/consulta/web/img/desmarcado.png) | CRUZ, K.; VASCONCELOS, A.; MELO, M.; ABREU, L. F. Determinação do índice de acidez e peróxido de óleo de andiroba (Carapa guianenses Aubl.). obtido através de adaptações do processo artesanal. In: SEMINÁRIO DE INICIAÇÃO CIENTÍFICA DA EMBRAPA AMAZÔNIA ORIENTAL, 15., 2011, Belém, PA. A ciência de fazer ciência: anais. Belém, PA: Embrapa Amazônia Oriental, 2011. 1 CD-ROM. PIBIC-2011. Biblioteca(s): Embrapa Amazônia Oriental. |
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32. | ![Imagem marcado/desmarcado](/consulta/web/img/desmarcado.png) | GOMES, G. M. F.; VASCONCELOS, A. M. de; FIGUEIREDO, H. O. S.; VASCONCELOS, A. S. do E.; CARNEIRO, J. da C.; BOMFIM, M. A. D. Degradabilidade ruminal in situ do bagaço de cana-de-açúcar in natura em caprinos e ovinos naturalizados do Nordeste brasileiro. In: REUNIÃO ANUAL DA SOCIEDADE BRASILEIRA DE ZOOTECNIA, 47., 2010, Salvador. Empreendedorismo e progresso científico na zootecnia brasileira: anais. Viçosa, MG: Sociedade Brasileira de Zootecnia, 2010. 3 p. Biblioteca(s): Embrapa Gado de Leite. |
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39. | ![Imagem marcado/desmarcado](/consulta/web/img/desmarcado.png) | SIQUEIRA, K. M. M. de; KIILL, L. H. P.; SILVA, N. C. da; VASCONCELOS, A. S. Floração e produção de frutos no meloeiro (Cucumis melo L.), tipo amarelo, em Juazeiro-BA. In: INTERNATIONAL FRUIT SYMPOSIUM: ADVANCES IN FRUIT PRODUCTION, 1., 2011, Campinas. Abstracts... Campinas: IAC, 2011. 1 CD-ROM. (IAC. Documentos, 102). Biblioteca(s): Embrapa Semiárido. |
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![](/consulta/web/img/deny.png) | Acesso ao texto completo restrito à biblioteca da Embrapa Florestas. Para informações adicionais entre em contato com cnpf.biblioteca@embrapa.br. |
Registro Completo
Biblioteca(s): |
Embrapa Florestas. |
Data corrente: |
24/10/2018 |
Data da última atualização: |
24/10/2018 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
B - 1 |
Autoria: |
TAUBE, P. S.; SILVA, D. S.; VASCONCELOS, A. A.; REBELLATO, L.; MADEUREIRA, L. A. dos S.; HANSEL, F. A. |
Afiliação: |
Paulo S. Taube, Universidade Federal do Oeste do Pará; Douglas S. Silva, Universidade Federal do Oeste do Pará; Arthur A. Vasconcelos, Universidade Federal do Oeste do Pará; Lilian Rebellato, Universidade Federal do Oeste do Pará; Luiz A. dos Santos Madureira, Universidade Federal de Santa Catarina; FABRICIO AUGUSTO HANSEL, CNPF. |
Título: |
Exploratory on-line pyrolysis and thermally assisted hydrolysis and methylation for evaluating non-hydrolyzable organic matter in anthropogenic soil from Central Brazilian Amazon. |
Ano de publicação: |
2018 |
Fonte/Imprenta: |
Brazilian Journal of Analytical Chemistry, v. 5, n. 19, p. 38-53, Jan. 2018. |
DOI: |
10.30744/brjac.2179-3425.2018.5.19.38-53 |
Idioma: |
Inglês |
Conteúdo: |
Amazonian dark earths (ADE) are characterized by high fertility and organic carbon content, the latter being associated with black carbon (BC). BC is recalcitrant in nature due to its aromatic building blocks and it is expected to remain in the non-hydrolyzable fraction after the sequential extraction of soil organic matter (SOM). In this context, the aim of this study was to compare the composition of non-hydrolyzable SOM samples from an ADE and an adjacent soil using pyrolysis - gas chromatography - mass spectrometry and thermally-assisted hydrolysis and methylation with tetramethylammonium hydroxide. We tested two hypotheses: (i) non-hydrolyzable organic matter preserves BC in ADE and adjacent soils; and (ii) pyrolysis products are also produced thermally and are different for ADE and adjacent soils. The results of this study showed that polycyclic aromatic hydrocarbons were the main pyrolysis products for both soils. In addition, the benzene / toluene, naphthalene / methylnaphthalene and benzofuran / methylbenzofuran ratios of the pyrolysis products observed in the case of ADE were around two times higher than the corresponding values for the adjacent soil, except in the surface horizon, which indicates the presence of a higher recalcitrant BC in the ADE. The specific organic matter sources for the ADE and adjacent soil could not be differentiated. |
Palavras-Chave: |
Black carbon; Py-GC-MS; THM-GC-MS. |
Thesagro: |
Carbonização; Carvão. |
Thesaurus NAL: |
Carbonization; Charcoal. |
Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
Marc: |
LEADER 02292naa a2200277 a 4500 001 2098132 005 2018-10-24 008 2018 bl uuuu u00u1 u #d 024 7 $a10.30744/brjac.2179-3425.2018.5.19.38-53$2DOI 100 1 $aTAUBE, P. S. 245 $aExploratory on-line pyrolysis and thermally assisted hydrolysis and methylation for evaluating non-hydrolyzable organic matter in anthropogenic soil from Central Brazilian Amazon.$h[electronic resource] 260 $c2018 520 $aAmazonian dark earths (ADE) are characterized by high fertility and organic carbon content, the latter being associated with black carbon (BC). BC is recalcitrant in nature due to its aromatic building blocks and it is expected to remain in the non-hydrolyzable fraction after the sequential extraction of soil organic matter (SOM). In this context, the aim of this study was to compare the composition of non-hydrolyzable SOM samples from an ADE and an adjacent soil using pyrolysis - gas chromatography - mass spectrometry and thermally-assisted hydrolysis and methylation with tetramethylammonium hydroxide. We tested two hypotheses: (i) non-hydrolyzable organic matter preserves BC in ADE and adjacent soils; and (ii) pyrolysis products are also produced thermally and are different for ADE and adjacent soils. The results of this study showed that polycyclic aromatic hydrocarbons were the main pyrolysis products for both soils. In addition, the benzene / toluene, naphthalene / methylnaphthalene and benzofuran / methylbenzofuran ratios of the pyrolysis products observed in the case of ADE were around two times higher than the corresponding values for the adjacent soil, except in the surface horizon, which indicates the presence of a higher recalcitrant BC in the ADE. The specific organic matter sources for the ADE and adjacent soil could not be differentiated. 650 $aCarbonization 650 $aCharcoal 650 $aCarbonização 650 $aCarvão 653 $aBlack carbon 653 $aPy-GC-MS 653 $aTHM-GC-MS 700 1 $aSILVA, D. S. 700 1 $aVASCONCELOS, A. A. 700 1 $aREBELLATO, L. 700 1 $aMADEUREIRA, L. A. dos S. 700 1 $aHANSEL, F. A. 773 $tBrazilian Journal of Analytical Chemistry$gv. 5, n. 19, p. 38-53, Jan. 2018.
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