| |
|
|
|
Registro Completo |
|
Biblioteca(s): |
Embrapa Cerrados. |
|
Data corrente: |
25/11/2010 |
|
Data da última atualização: |
25/11/2010 |
|
Tipo da produção científica: |
Artigo em Anais de Congresso |
|
Autoria: |
BRAGA, A. R. dos S.; BRUAND, A.; GUILHERME, L. R. G.; MARTINS, E. de S.; MEDRADO, E.; BROSSARD, M.; MULLER, F. |
|
Afiliação: |
ADRIANA REATTO DOS SANTOS BRAGA, CPAC; ARY BRUAND, ISTO; LUIZ ROBERTO GUIMARÃES GUILHERME, UFLA; EDER DE SOUZA MARTINS, CPAC; EUZÉBIO MEDRADO, CONSULTOR TÉCNICO; MICHEL BROSSARD, IRD; FABRICE MULLER, ISTO. |
|
Título: |
Geochemical processes in latosols on the geomorphic surfaces from Brazilian Central Plateau. |
|
Ano de publicação: |
2010 |
|
Fonte/Imprenta: |
In: WORLD CONGRESS OF SOIL SCIENCE, 19., 2010, Brisbane. Soil solutions for a changing world. Brisbane: International Union of Soil Science: ASSSI, 2010. 1 CD-ROM. GIKES, R. J.; PRAKONGKEP, N. (Ed.). |
|
Idioma: |
Inglês |
|
Conteúdo: |
Latosols are deeply weathered soils characteristic of the most Tropics. These soils represent 1/3 of the Brazilian National Territory and occupy about 40% of the Brazilian Central Plateau. The objective of this study was to discuss the distribution of the Latosols on the geomorphic surfaces from Brazilian Central Plateau based on geochemical process. Ten Latosols (L) developed in different parent materials were selected along an approximately 350km long regional toposequence across the South American Surface (L1
to L4) and Velhas Surface (L5 to L10) from Brazilian Central Plateau. The main conclusion is that there is a close relation between the occurrence of gibbsite(Gb), kaolinite (K) and hydroxy-Al interlayered vermiculite (HIV) in the soil-solution phase versus their presence in the equilibrium soil-solid phase for these Latosols independently of the geomorphic surface. The presence of HIV is not consistent with the weathering process in the tropical areas where the tendency is the progressive loss of Si and the enrichment of Al consequently Gb. |
|
Thesagro: |
Latossolo. |
|
Categoria do assunto: |
-- |
|
Marc: |
LEADER 01793naa a2200205 a 4500
001 1867938
005 2010-11-25
008 2010 bl uuuu u00u1 u #d
100 1 $aBRAGA, A. R. dos S.
245 $aGeochemical processes in latosols on the geomorphic surfaces from Brazilian Central Plateau.
260 $c2010
520 $aLatosols are deeply weathered soils characteristic of the most Tropics. These soils represent 1/3 of the Brazilian National Territory and occupy about 40% of the Brazilian Central Plateau. The objective of this study was to discuss the distribution of the Latosols on the geomorphic surfaces from Brazilian Central Plateau based on geochemical process. Ten Latosols (L) developed in different parent materials were selected along an approximately 350km long regional toposequence across the South American Surface (L1 to L4) and Velhas Surface (L5 to L10) from Brazilian Central Plateau. The main conclusion is that there is a close relation between the occurrence of gibbsite(Gb), kaolinite (K) and hydroxy-Al interlayered vermiculite (HIV) in the soil-solution phase versus their presence in the equilibrium soil-solid phase for these Latosols independently of the geomorphic surface. The presence of HIV is not consistent with the weathering process in the tropical areas where the tendency is the progressive loss of Si and the enrichment of Al consequently Gb.
650 $aLatossolo
700 1 $aBRUAND, A.
700 1 $aGUILHERME, L. R. G.
700 1 $aMARTINS, E. de S.
700 1 $aMEDRADO, E.
700 1 $aBROSSARD, M.
700 1 $aMULLER, F.
773 $tIn: WORLD CONGRESS OF SOIL SCIENCE, 19., 2010, Brisbane. Soil solutions for a changing world. Brisbane: International Union of Soil Science: ASSSI, 2010. 1 CD-ROM. GIKES, R. J.; PRAKONGKEP, N. (Ed.).
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Cerrados (CPAC) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
URL |
Voltar
|
|
|
 | Acesso ao texto completo restrito à biblioteca da Embrapa Agroenergia. Para informações adicionais entre em contato com cnpae.biblioteca@embrapa.br. |
Registro Completo
|
Biblioteca(s): |
Embrapa Agroenergia. |
|
Data corrente: |
04/10/2013 |
|
Data da última atualização: |
21/09/2017 |
|
Tipo da produção científica: |
Artigo em Periódico Indexado |
|
Circulação/Nível: |
A - 2 |
|
Autoria: |
CARVALHO, M. L.; ZUÑIGA, U. F. R.; SUAREZ, C. A. G.; GIORDANO, R. C.; GIORDANO, R. L. C.; RODRIGUES, D. de S.; JUNIOR, R. S. |
|
Afiliação: |
M. L. Carvalho, Universidade Federal de São Carlos; U. F. Rodríguez-Zúñiga, Universidade Federal de São Carlos; C. A. G. Suarez, Universidade Federal de São Carlos; R. C. Giordano, Universidade Federal de São Carlos; R. L. C. Giordano, Universidade Federal de São Carlos; DASCIANA DE SOUSA RODRIGUES, CNPAE; R. Sousa Jr., Universidade Federal de São Carlos. |
|
Título: |
Kinetic study of the enzymatic hydrolysis of sugarcane bagasse. |
|
Ano de publicação: |
2013 |
|
Fonte/Imprenta: |
Brazilian Journal of Chemical Engineering, v. 30, n. 3, p. 437-447, 2013. |
|
DOI: |
10.1590/S0104-66322013000300002 |
|
Idioma: |
Inglês |
|
Conteúdo: |
This work presents a kinetic study of the enzymatic hydrolysis of three cellulosic substrates: filter paper (FP), used as a low recalcitrance substrate model; steam exploded sugarcane bagasse (SB); and weak acid pretreated SB (1:20 dry bagasse:H2SO4 solution 1% w/w), the last two delignified with 4% NaOH (w/w). The influence of substrate concentration was assessed in hydrolysis experiments in a shaker, using Accellerase® 1500, at pH 4.8, in 50 mM sodium citrate buffer. Cellulose loads (weightsubstrate/weighttotal) were changed between 0.5%-13% (for FP) and 0.99%-9.09% (for SB). For FP and low loads of steam exploded SB, it was possible to fit pseudo-homogeneous Michaelis-Menten models (with inhibition). For FP and higher loads of steam exploded SB, modified Michaelis-Menten models were fitted. Besides, it was observed that, after retuning of the model parameters, it is possible to apply a model fitted for one situation to a different case. Chrastil models were also fitted and they were the only feasible approach for the highly recalcitrant acid-treated SB. |
|
Palavras-Chave: |
Cellulose enzymatic hydrolysis; Kinetic study. |
|
Thesaurus NAL: |
sugarcane bagasse. |
|
Categoria do assunto: |
-- |
|
Marc: |
LEADER 01822naa a2200241 a 4500
001 1967824
005 2017-09-21
008 2013 bl uuuu u00u1 u #d
024 7 $a10.1590/S0104-66322013000300002$2DOI
100 1 $aCARVALHO, M. L.
245 $aKinetic study of the enzymatic hydrolysis of sugarcane bagasse.$h[electronic resource]
260 $c2013
520 $aThis work presents a kinetic study of the enzymatic hydrolysis of three cellulosic substrates: filter paper (FP), used as a low recalcitrance substrate model; steam exploded sugarcane bagasse (SB); and weak acid pretreated SB (1:20 dry bagasse:H2SO4 solution 1% w/w), the last two delignified with 4% NaOH (w/w). The influence of substrate concentration was assessed in hydrolysis experiments in a shaker, using Accellerase® 1500, at pH 4.8, in 50 mM sodium citrate buffer. Cellulose loads (weightsubstrate/weighttotal) were changed between 0.5%-13% (for FP) and 0.99%-9.09% (for SB). For FP and low loads of steam exploded SB, it was possible to fit pseudo-homogeneous Michaelis-Menten models (with inhibition). For FP and higher loads of steam exploded SB, modified Michaelis-Menten models were fitted. Besides, it was observed that, after retuning of the model parameters, it is possible to apply a model fitted for one situation to a different case. Chrastil models were also fitted and they were the only feasible approach for the highly recalcitrant acid-treated SB.
650 $asugarcane bagasse
653 $aCellulose enzymatic hydrolysis
653 $aKinetic study
700 1 $aZUÑIGA, U. F. R.
700 1 $aSUAREZ, C. A. G.
700 1 $aGIORDANO, R. C.
700 1 $aGIORDANO, R. L. C.
700 1 $aRODRIGUES, D. de S.
700 1 $aJUNIOR, R. S.
773 $tBrazilian Journal of Chemical Engineering$gv. 30, n. 3, p. 437-447, 2013.
Download
Esconder MarcMostrar Marc Completo |
|
Registro original: |
Embrapa Agroenergia (CNPAE) |
|
|
Biblioteca |
ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
Fechar
|
| Expressão de busca inválida. Verifique!!! |
|
|
