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| 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: |
04/08/2016 |
Data da última atualização: |
08/08/2016 |
Autoria: |
PEREIRA, B. L. C.; CARNEIRO, A. DE C. O.; CARVALHO, A. M. M. L.; COLODETTE, J. L.; OLIVEIRA, A. C.; FONTES, M. P. F. |
Título: |
Influence of chemical composition of Eucalyptus wood on gravimetric yield and charcoal properties. |
Ano de publicação: |
2013 |
Fonte/Imprenta: |
BioResources, Raleigh, v. 8, n. 3, p. 4574-4592, Aug. 2013. |
Idioma: |
Inglês |
Conteúdo: |
The objective of this study was to assess the chemical properties of wood from six clones of Eucalyptus spp. relative to charcoal yield and its properties, determine the correlations between the evaluated parameters and identify a clone of Eucalyptus having the greatest potential for charcoal to steelmaking use. The study of chemical properties included analysis of elemental composition, contents of cellulose, hemicelluloses, lignin, and ash, the syringyl/guaiacyl ratio (S/G), and the index of crystalline cellulose in the wood. The pyrolysis of wood was done in an electric laboratory oven. The gravimetric yield in charcoal, the content of volatile matter, fixed carbon and ash, higher heating value, and elementary composition were determined. Data were subjected to an analysis of variance, and after the difference between them was established, the Tukey test was applied. The Pearson correlation was employed as well. The results indicated that the contents of carbon, oxygen, and hydrogen in the wood significantly affected the charcoal yields and its higher heating value. Higher rates of crystalline cellulose favored the gravimetric yield in charcoal. The S/G ratio contributed more to the charcoal yield when compared to total lignin content. |
Palavras-Chave: |
Crystalline cellulose. |
Thesagro: |
Carvão vegetal; Composição química; Eucalipto; Madeira. |
Thesaurus Nal: |
Charcoal; Eucalyptus; Product quality. |
Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
Marc: |
LEADER 02082naa a2200277 a 4500 001 2050251 005 2016-08-08 008 2013 bl uuuu u00u1 u #d 100 1 $aPEREIRA, B. L. C. 245 $aInfluence of chemical composition of Eucalyptus wood on gravimetric yield and charcoal properties.$h[electronic resource] 260 $c2013 520 $aThe objective of this study was to assess the chemical properties of wood from six clones of Eucalyptus spp. relative to charcoal yield and its properties, determine the correlations between the evaluated parameters and identify a clone of Eucalyptus having the greatest potential for charcoal to steelmaking use. The study of chemical properties included analysis of elemental composition, contents of cellulose, hemicelluloses, lignin, and ash, the syringyl/guaiacyl ratio (S/G), and the index of crystalline cellulose in the wood. The pyrolysis of wood was done in an electric laboratory oven. The gravimetric yield in charcoal, the content of volatile matter, fixed carbon and ash, higher heating value, and elementary composition were determined. Data were subjected to an analysis of variance, and after the difference between them was established, the Tukey test was applied. The Pearson correlation was employed as well. The results indicated that the contents of carbon, oxygen, and hydrogen in the wood significantly affected the charcoal yields and its higher heating value. Higher rates of crystalline cellulose favored the gravimetric yield in charcoal. The S/G ratio contributed more to the charcoal yield when compared to total lignin content. 650 $aCharcoal 650 $aEucalyptus 650 $aProduct quality 650 $aCarvão vegetal 650 $aComposição química 650 $aEucalipto 650 $aMadeira 653 $aCrystalline cellulose 700 1 $aCARNEIRO, A. DE C. O. 700 1 $aCARVALHO, A. M. M. L. 700 1 $aCOLODETTE, J. L. 700 1 $aOLIVEIRA, A. C. 700 1 $aFONTES, M. P. F. 773 $tBioResources, Raleigh$gv. 8, n. 3, p. 4574-4592, Aug. 2013.
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Embrapa Florestas (CNPF) |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Caprinos e Ovinos. Para informações adicionais entre em contato com cnpc.biblioteca@embrapa.br. |
Registro Completo
Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
Data corrente: |
09/12/2019 |
Data da última atualização: |
10/12/2019 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
B - 1 |
Autoria: |
VASCONCELOS, A. M. de; OSTERNO, J. J.; ROGERIO, M. C. P.; FAÇANHA, D. A. E.; LANDIM, A. V.; PINHEIRO, A. A.; SILVEIRA, R. M. F.; FERREIRA, J. B. |
Afiliação: |
ANGELA MARIA DE VASCONCELOS; JULIANA JUSTINO OSTERNO; MARCOS CLAUDIO PINHEIRO ROGERIO, CNPC; DÉBORA ANDRÉA EVANGELISTA FAÇANHA; ALINE VIEIRA LANDIM; ALICE ANDRIOLI PINHEIRO, CNPC; ROBSON MATEUS FREITAS SILVEIRA; JOSIEL BORGES FERREIRA. |
Título: |
Adaptive profile of Saanen goats in tropical conditions. |
Ano de publicação: |
2019 |
Fonte/Imprenta: |
Biological Rhythm Research, v. 50, 2019. |
DOI: |
https://doi.org/10.1080/09291016.2019.1603691 |
Idioma: |
Inglês |
Conteúdo: |
The objective was to characterize the adaptive profile and thermoregulatory responses of Saanen goats raised under tropical conditions. Twenty dairy goats were used. Its rectal temperature (RT, °C), respiratory rate (RR, breaths min?1), and heart rate (HR, bpm) were collected biweekly for two consecutive years. Individual blood samples were collected for determination of thyroxine (T4; ?g dL?1). All physiological responses were higher in the afternoon, except for RR which was higher in the morning. The RT and RR were higher in the rainy season, and HR and T4 levels had no effect between periods of the year. The RT, HR, RR and T4, in this order of importance, are the most important variables to characterize the adaptive profile of the animals. The thermoregulatory responses during the morning and afternoon shifts were similar, whereas between periods of the year the animals used different mechanisms to maintain homeostasis. Saanen goats mainly use the latent thermoregulation mechanisms in the rainy season as a form of endogenous heat dissipation and the sensitive mechanisms in the dry season. The RT is a physiological variable that presents discriminatory power for evaluation of adaptive aspects in Saanen goats in tropical conditions. |
Palavras-Chave: |
Thermolysis. |
Thesaurus NAL: |
Animal adaptation; Dairy goats; Multivariate analysis; Semiarid zones. |
Categoria do assunto: |
L Ciência Animal e Produtos de Origem Animal |
Marc: |
LEADER 02060naa a2200277 a 4500 001 2116415 005 2019-12-10 008 2019 bl uuuu u00u1 u #d 024 7 $ahttps://doi.org/10.1080/09291016.2019.1603691$2DOI 100 1 $aVASCONCELOS, A. M. de 245 $aAdaptive profile of Saanen goats in tropical conditions.$h[electronic resource] 260 $c2019 520 $aThe objective was to characterize the adaptive profile and thermoregulatory responses of Saanen goats raised under tropical conditions. Twenty dairy goats were used. Its rectal temperature (RT, °C), respiratory rate (RR, breaths min?1), and heart rate (HR, bpm) were collected biweekly for two consecutive years. Individual blood samples were collected for determination of thyroxine (T4; ?g dL?1). All physiological responses were higher in the afternoon, except for RR which was higher in the morning. The RT and RR were higher in the rainy season, and HR and T4 levels had no effect between periods of the year. The RT, HR, RR and T4, in this order of importance, are the most important variables to characterize the adaptive profile of the animals. The thermoregulatory responses during the morning and afternoon shifts were similar, whereas between periods of the year the animals used different mechanisms to maintain homeostasis. Saanen goats mainly use the latent thermoregulation mechanisms in the rainy season as a form of endogenous heat dissipation and the sensitive mechanisms in the dry season. The RT is a physiological variable that presents discriminatory power for evaluation of adaptive aspects in Saanen goats in tropical conditions. 650 $aAnimal adaptation 650 $aDairy goats 650 $aMultivariate analysis 650 $aSemiarid zones 653 $aThermolysis 700 1 $aOSTERNO, J. J. 700 1 $aROGERIO, M. C. P. 700 1 $aFAÇANHA, D. A. E. 700 1 $aLANDIM, A. V. 700 1 $aPINHEIRO, A. A. 700 1 $aSILVEIRA, R. M. F. 700 1 $aFERREIRA, J. B. 773 $tBiological Rhythm Research$gv. 50, 2019.
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