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Registro Completo |
Biblioteca(s): |
Embrapa Cerrados. |
Data corrente: |
26/03/1999 |
Data da última atualização: |
26/03/1999 |
Autoria: |
CRUVINEL, I. R. O. D.; LEANDRO JUNIOR, G. de M.; ALVES, G. M. R.; COSTA, L. S. da; SANTOS, A. F. dos; MELO, W. F. de; SILVEIRA, H. E. de P.; FERNANDES, P. M.; CZEPAK, C. |
Título: |
Eficiencia do inseticida benfuracarb em tratamento de sementes para controle de cigarrinha das pastagens Deois flavopicta na cultura do arroz de sequeiro. |
Ano de publicação: |
1998 |
Fonte/Imprenta: |
In: CONGRESSO BRASILEIRO DE ENTOMOLOGIA, 17.; ENCONTRO NACIONAL DE FITOSSANITARISTAS, 8., 1998, Rio de Janeiro, RJ. Resumos. [Rio de Janeiro]: UFRRJ, 1998. |
Páginas: |
p.237. |
Idioma: |
Português |
Palavras-Chave: |
Controle de pragas; Seed dressing; Tratamento da semente; Upland rice. |
Thesagro: |
Arroz Sequeiro; Cerrado; Deois Flavopicta; Inseticida; Oryza Sativa; Pastagem. |
Thesaurus Nal: |
insecticides; pastures; pest control. |
Categoria do assunto: |
-- |
Marc: |
LEADER 01198naa a2200373 a 4500 001 1545073 005 1999-03-26 008 1998 bl uuuu u00u1 u #d 100 1 $aCRUVINEL, I. R. O. D. 245 $aEficiencia do inseticida benfuracarb em tratamento de sementes para controle de cigarrinha das pastagens Deois flavopicta na cultura do arroz de sequeiro. 260 $c1998 300 $ap.237. 650 $ainsecticides 650 $apastures 650 $apest control 650 $aArroz Sequeiro 650 $aCerrado 650 $aDeois Flavopicta 650 $aInseticida 650 $aOryza Sativa 650 $aPastagem 653 $aControle de pragas 653 $aSeed dressing 653 $aTratamento da semente 653 $aUpland rice 700 1 $aLEANDRO JUNIOR, G. de M. 700 1 $aALVES, G. M. R. 700 1 $aCOSTA, L. S. da 700 1 $aSANTOS, A. F. dos 700 1 $aMELO, W. F. de 700 1 $aSILVEIRA, H. E. de P. 700 1 $aFERNANDES, P. M. 700 1 $aCZEPAK, C. 773 $tIn: CONGRESSO BRASILEIRO DE ENTOMOLOGIA, 17.; ENCONTRO NACIONAL DE FITOSSANITARISTAS, 8., 1998, Rio de Janeiro, RJ. Resumos. [Rio de Janeiro]: UFRRJ, 1998.
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Embrapa Cerrados (CPAC) |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Solos. Para informações adicionais entre em contato com cnps.biblioteca@embrapa.br. |
Registro Completo
Biblioteca(s): |
Embrapa Florestas; Embrapa Solos. |
Data corrente: |
27/02/2013 |
Data da última atualização: |
26/09/2023 |
Tipo da produção científica: |
Artigo em Anais de Congresso |
Autoria: |
ALHO, C. F. B. V.; AUCCAISE, R.; MAIA, C. M. B. de F.; NOVOTNY, E. H.; LELIS, R. C. C. |
Afiliação: |
CARLOS FRANCISCO BRAZÃO VIEIRA ALHO, UNIVERSIDADE FEDERAL RURAL DO RIO DE JANEIRO; RUBEN AUCCAISE, BOLSISTA CNPS; CLAUDIA MARIA BRANCO DE F MAIA, CNPF; ETELVINO HENRIQUE NOVOTNY, CNPS; ROBERTO CARLOS COSTA LELIS, UNIVERSIDADE FEDERAL RURAL DO RIO DE JANEIRO. |
Título: |
Using solid state 13C NMR to study pyrolysis final temperature effects on biochar stability. |
Ano de publicação: |
2013 |
Fonte/Imprenta: |
In: XU, J.; WU, J.; HE, Y. (ed.). Functions of natural organic matter in changing environment. Dordrecht: Springer, 2013. p. 1007-1011. |
DOI: |
https://doi.org/10.1007/978-94-007-5634-2_186 |
Idioma: |
Inglês |
Conteúdo: |
Recent results in biochar research show that it is not only composed of stable carbon, since a portion of these materials is degraded relatively easily once applied to soil, and this condition is most dependent on pyrolysis conditions, especially the final temperature. Thus, the aim of this study was to evaluate pyrolysis final temperature effects on the stability of biochar produced from forest residues using solid-state 13C NMR. Pyrolysis was performed at a heating rate of 10°C·min-1 up to the final temperature of interest (350, 450 and 550°C), maintaining this temperature for 60 min. Solid-state 13C NMR spectra were obtained on a Varian 500-MHz spectrometer for fresh wood and biochars produced at 350, 450 and 550°C for Eucalyptus dunnii (DUN) and Pinus caribaea (CAR). Comparing fresh samples with their respective biochars, regardless of the botanical group, after pyrolysis, carbohydrates are degraded, and there is a change in the structure of the materials, with a predominance of aromatic structures, which are more resistant to degradation, therefore reflecting in the increased stability of these materials. For 350°C, it is still possible to observe signals related to lignin indicating that up to this temperature it has not been completely degraded. The spectra of biochars produced at 450 and 550°C are very similar, indicating that there is no need to produce biochars at very high final temperatures, since the structure of these materials obtained at 550°C slightly altered as of 450°C, keeping the predominance of aromatic structures. MenosRecent results in biochar research show that it is not only composed of stable carbon, since a portion of these materials is degraded relatively easily once applied to soil, and this condition is most dependent on pyrolysis conditions, especially the final temperature. Thus, the aim of this study was to evaluate pyrolysis final temperature effects on the stability of biochar produced from forest residues using solid-state 13C NMR. Pyrolysis was performed at a heating rate of 10°C·min-1 up to the final temperature of interest (350, 450 and 550°C), maintaining this temperature for 60 min. Solid-state 13C NMR spectra were obtained on a Varian 500-MHz spectrometer for fresh wood and biochars produced at 350, 450 and 550°C for Eucalyptus dunnii (DUN) and Pinus caribaea (CAR). Comparing fresh samples with their respective biochars, regardless of the botanical group, after pyrolysis, carbohydrates are degraded, and there is a change in the structure of the materials, with a predominance of aromatic structures, which are more resistant to degradation, therefore reflecting in the increased stability of these materials. For 350°C, it is still possible to observe signals related to lignin indicating that up to this temperature it has not been completely degraded. The spectra of biochars produced at 450 and 550°C are very similar, indicating that there is no need to produce biochars at very high final temperatures, since the structure of these materials obtained at 550°C slightly altere... Mostrar Tudo |
Palavras-Chave: |
Forest residues; NMR; Organic matter stability; Pyrogenic carbon. |
Thesaurus NAL: |
biochar. |
Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
Marc: |
LEADER 02379nam a2200229 a 4500 001 2156892 005 2023-09-26 008 2013 bl uuuu u00u1 u #d 024 7 $ahttps://doi.org/10.1007/978-94-007-5634-2_186$2DOI 100 1 $aALHO, C. F. B. V. 245 $aUsing solid state 13C NMR to study pyrolysis final temperature effects on biochar stability.$h[electronic resource] 260 $aIn: XU, J.; WU, J.; HE, Y. (ed.). Functions of natural organic matter in changing environment. Dordrecht: Springer, 2013. p. 1007-1011.$c1011 520 $aRecent results in biochar research show that it is not only composed of stable carbon, since a portion of these materials is degraded relatively easily once applied to soil, and this condition is most dependent on pyrolysis conditions, especially the final temperature. Thus, the aim of this study was to evaluate pyrolysis final temperature effects on the stability of biochar produced from forest residues using solid-state 13C NMR. Pyrolysis was performed at a heating rate of 10°C·min-1 up to the final temperature of interest (350, 450 and 550°C), maintaining this temperature for 60 min. Solid-state 13C NMR spectra were obtained on a Varian 500-MHz spectrometer for fresh wood and biochars produced at 350, 450 and 550°C for Eucalyptus dunnii (DUN) and Pinus caribaea (CAR). Comparing fresh samples with their respective biochars, regardless of the botanical group, after pyrolysis, carbohydrates are degraded, and there is a change in the structure of the materials, with a predominance of aromatic structures, which are more resistant to degradation, therefore reflecting in the increased stability of these materials. For 350°C, it is still possible to observe signals related to lignin indicating that up to this temperature it has not been completely degraded. The spectra of biochars produced at 450 and 550°C are very similar, indicating that there is no need to produce biochars at very high final temperatures, since the structure of these materials obtained at 550°C slightly altered as of 450°C, keeping the predominance of aromatic structures. 650 $abiochar 653 $aForest residues 653 $aNMR 653 $aOrganic matter stability 653 $aPyrogenic carbon 700 1 $aAUCCAISE, R. 700 1 $aMAIA, C. M. B. de F. 700 1 $aNOVOTNY, E. H. 700 1 $aLELIS, R. C. C.
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