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Registro Completo |
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Biblioteca(s): |
Embrapa Caprinos e Ovinos. |
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Data corrente: |
13/09/2018 |
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Data da última atualização: |
23/09/2019 |
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Tipo da produção científica: |
Nota Técnica/Nota Científica |
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Autoria: |
SILVA, D. L. S.; OLIVEIRA, K. P.; AROEIRA, L. J. M.; CHAVES, D. F.; PONCIANO, M. F.; BRAGA, A. P.; LIMA JUNIOR, D. M. |
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Afiliação: |
Dinnara L. S. Silva, Universidade Federal da Paraíba (UFPB) - Areia, PB, Brasil; Karla P. Oliveira, Universidade Federal Rural do Semiárido (UFERSA) - Mossoró, RN, Brasil; Luiz J. M. Aroeira; Dowglish F. Chaves; Márcio F. Ponciano, CNPC; Alexandre P. Braga; Dorgival M. Lima Júnior, Universidade Federal de Alagoas (UFAL) - Arapiraca - AL, Brasil. |
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Título: |
Chemical composition of caatinga potential forages species. |
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Ano de publicação: |
2015 |
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Fonte/Imprenta: |
Tropical and Subtropical Agroecosystems, Yucatán, MEX, v. 18, n. 3, p. 267-272, set./dez. 2015. |
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Idioma: |
Inglês |
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Conteúdo: |
Abstract: Chemical composition of some potential forages species, natives from Caatinga region, were evaluated. Samples of Macroptilium heterophyllum, Stylosanthes humilis, Rhynchosia mÃnima, Desmodium tortuosum Sw. Dc, Merremia aegyptia, Mimosa tenuiflora Wild, Bauhinia cheilantha and as well Macroptilium lathyroides, Caesalpinia pyramidalis and Mimosa tenuiflora hays were collected in Rio Grande do Norte Stated, during 2011 rainy season. The analyses: dry matter (DM), crude protein (CP) mineral matter (MM) ether extract (EE) neutral detergent fiber (NDF), acid detergent fiber (ADF), lignin (LIG), insoluble neutral detergent nitrogen, (INDN) insoluble acid detergent nitrogen, (ADIN), total phenol (TF) and total tannin (TT) were done at Embrapa Caprinos e Ovinos in Ceará State. Plants analyzed, as expected, for tropical species, exhibited high level of cell wall constituents, high lignifications rate and revealed substantial presence of anti nutritional compounds. However, regardless of this data, the main problem, for grazing animals, is due to its xerophytes characteristics. Most of the shrubs and trees are deciduous, losing its leaves during the dry season. In addition, herbaceous presents a very rapid lifetime cycle, germinating and senescing during the brief wet season. [Composición química y potencial forrajero de especies de la región de Caatinga]. Resumen: Se evaluó la composición química de algunas especies forrajeras potenciales nativas de la región de Caatinga. Muestras de Macroptilium heterophyllum, Stylosanthes humilis, Rhynchosia minima, Desmodium tortuosum Sw. Dc, Merremia aegyptia, Mimosa tenuiflora Wild, Bauhinia cheilantha y así como de heno de Macroptilium lathyroides, Caesalpinia pyramidalis y Mimosa tenuiflora se colectaron en Rio Grande do Norte durante la temporada de lluvias de 2011. Las muestras fueron analizadas para determinar su contenido de materia seca (MS), proteína cruda (PC), minerales (MM), extracto etéreo (EE), fibra neutro detergente (FND), fibra detergente ácido (FDA), lignina (LIG), nitrógeno insoluble detergente neutro (INDN), nitrógeno insoluble detergente ácido (ADIN), fenoles totales (FT) y taninos totales (TT). Como se esperaba, para las especies tropicales, las plantas exhibieron alto nivel de componentes de la pared celular, alta tasa de lignificación y reveló la presencia sustancial de compuestos antinutricionales. Sin embargo, el principal problema para los animales de pastoreo se debe a sus características Xerófitas. La mayoría de los arbustos y los árboles son de hoja caduca, perdiendo sus hojas durante la estación seca. Además, las herbáceas presentan un ciclo de vida muy rápido, germinando y llegando a senescencia durante la breve temporada de lluvias MenosAbstract: Chemical composition of some potential forages species, natives from Caatinga region, were evaluated. Samples of Macroptilium heterophyllum, Stylosanthes humilis, Rhynchosia mÃnima, Desmodium tortuosum Sw. Dc, Merremia aegyptia, Mimosa tenuiflora Wild, Bauhinia cheilantha and as well Macroptilium lathyroides, Caesalpinia pyramidalis and Mimosa tenuiflora hays were collected in Rio Grande do Norte Stated, during 2011 rainy season. The analyses: dry matter (DM), crude protein (CP) mineral matter (MM) ether extract (EE) neutral detergent fiber (NDF), acid detergent fiber (ADF), lignin (LIG), insoluble neutral detergent nitrogen, (INDN) insoluble acid detergent nitrogen, (ADIN), total phenol (TF) and total tannin (TT) were done at Embrapa Caprinos e Ovinos in Ceará State. Plants analyzed, as expected, for tropical species, exhibited high level of cell wall constituents, high lignifications rate and revealed substantial presence of anti nutritional compounds. However, regardless of this data, the main problem, for grazing animals, is due to its xerophytes characteristics. Most of the shrubs and trees are deciduous, losing its leaves during the dry season. In addition, herbaceous presents a very rapid lifetime cycle, germinating and senescing during the brief wet season. [Composición química y potencial forrajero de especies de la región de Caatinga]. Resumen: Se evaluó la composición química de algunas especies forrajeras potenciales nativas de la región de Caatinga.... Mostrar Tudo |
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Palavras-Chave: |
Bauhinia cheilantha; Jitirana; Macroptilium heterophyllum; Merremia aegyptia; Rhynchosia mínima. |
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Thesagro: |
Caatinga; Caesalpinia Pyramidalis; Catingueira; Composição Química; Espécie Nativa; Jurema Preta; Leguminosa Forrageira; Stylosanthes Humilis; Tanino; Vegetação Nativa. |
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Thesaurus Nal: |
Chemical composition; Desmodium tortuosum; Forage legumes; Macroptilium lathyroides; Mimosa tenuiflora; Semiarid zones; Tannins; Vegetation. |
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Categoria do assunto: |
F Plantas e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/182865/1/cnpc-2015-Chemical.pdf
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Marc: |
LEADER 04137naa a2200469 a 4500
001 2095581
005 2019-09-23
008 2015 bl uuuu u00u1 u #d
100 1 $aSILVA, D. L. S.
245 $aChemical composition of caatinga potential forages species.$h[electronic resource]
260 $c2015
520 $aAbstract: Chemical composition of some potential forages species, natives from Caatinga region, were evaluated. Samples of Macroptilium heterophyllum, Stylosanthes humilis, Rhynchosia mÃnima, Desmodium tortuosum Sw. Dc, Merremia aegyptia, Mimosa tenuiflora Wild, Bauhinia cheilantha and as well Macroptilium lathyroides, Caesalpinia pyramidalis and Mimosa tenuiflora hays were collected in Rio Grande do Norte Stated, during 2011 rainy season. The analyses: dry matter (DM), crude protein (CP) mineral matter (MM) ether extract (EE) neutral detergent fiber (NDF), acid detergent fiber (ADF), lignin (LIG), insoluble neutral detergent nitrogen, (INDN) insoluble acid detergent nitrogen, (ADIN), total phenol (TF) and total tannin (TT) were done at Embrapa Caprinos e Ovinos in Ceará State. Plants analyzed, as expected, for tropical species, exhibited high level of cell wall constituents, high lignifications rate and revealed substantial presence of anti nutritional compounds. However, regardless of this data, the main problem, for grazing animals, is due to its xerophytes characteristics. Most of the shrubs and trees are deciduous, losing its leaves during the dry season. In addition, herbaceous presents a very rapid lifetime cycle, germinating and senescing during the brief wet season. [Composición química y potencial forrajero de especies de la región de Caatinga]. Resumen: Se evaluó la composición química de algunas especies forrajeras potenciales nativas de la región de Caatinga. Muestras de Macroptilium heterophyllum, Stylosanthes humilis, Rhynchosia minima, Desmodium tortuosum Sw. Dc, Merremia aegyptia, Mimosa tenuiflora Wild, Bauhinia cheilantha y así como de heno de Macroptilium lathyroides, Caesalpinia pyramidalis y Mimosa tenuiflora se colectaron en Rio Grande do Norte durante la temporada de lluvias de 2011. Las muestras fueron analizadas para determinar su contenido de materia seca (MS), proteína cruda (PC), minerales (MM), extracto etéreo (EE), fibra neutro detergente (FND), fibra detergente ácido (FDA), lignina (LIG), nitrógeno insoluble detergente neutro (INDN), nitrógeno insoluble detergente ácido (ADIN), fenoles totales (FT) y taninos totales (TT). Como se esperaba, para las especies tropicales, las plantas exhibieron alto nivel de componentes de la pared celular, alta tasa de lignificación y reveló la presencia sustancial de compuestos antinutricionales. Sin embargo, el principal problema para los animales de pastoreo se debe a sus características Xerófitas. La mayoría de los arbustos y los árboles son de hoja caduca, perdiendo sus hojas durante la estación seca. Además, las herbáceas presentan un ciclo de vida muy rápido, germinando y llegando a senescencia durante la breve temporada de lluvias
650 $aChemical composition
650 $aDesmodium tortuosum
650 $aForage legumes
650 $aMacroptilium lathyroides
650 $aMimosa tenuiflora
650 $aSemiarid zones
650 $aTannins
650 $aVegetation
650 $aCaatinga
650 $aCaesalpinia Pyramidalis
650 $aCatingueira
650 $aComposição Química
650 $aEspécie Nativa
650 $aJurema Preta
650 $aLeguminosa Forrageira
650 $aStylosanthes Humilis
650 $aTanino
650 $aVegetação Nativa
653 $aBauhinia cheilantha
653 $aJitirana
653 $aMacroptilium heterophyllum
653 $aMerremia aegyptia
653 $aRhynchosia mínima
700 1 $aOLIVEIRA, K. P.
700 1 $aAROEIRA, L. J. M.
700 1 $aCHAVES, D. F.
700 1 $aPONCIANO, M. F.
700 1 $aBRAGA, A. P.
700 1 $aLIMA JUNIOR, D. M.
773 $tTropical and Subtropical Agroecosystems, Yucatán, MEX$gv. 18, n. 3, p. 267-272, set./dez. 2015.
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Registro original: |
Embrapa Caprinos e Ovinos (CNPC) |
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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
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
18/10/2019 |
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Data da última atualização: |
17/11/2020 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 2 |
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Autoria: |
LOURENÇON, T. V.; ALAKURTII, S.; VIRTANEN, T.; JÄÄSKELÄINEN, A.-S.; LIITIÄ, T.; HUGHES, M.; MAGALHAES, W. L. E.; BOLZON DE MUNIZ, G. I.; TAMMINEN, T. |
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Afiliação: |
Tainise V. Lourençon, Aalto UniversitY; Sami Alakurtti, VTT Technical Research Centre of Finland; Tommi Virtanen, VTT Technical Research Centre of Finland; Anna-Stiina Jääskeläinen, VTT Technical Research Centre of Finland; Tiina Liitiä, VTT Technical Research Centre of Finland; Mark Hughes, Aalto University; WASHINGTON LUIZ ESTEVES MAGALHAES, CNPF; Graciela I. Bolzon de Muniz, UFPR; Tarja Tamminen, VTT Technical Research Centre of Finland. |
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Título: |
Phenol-formaldehyde resins with suitable bonding strength synthesized from "less-reactive" hardwood lignin fractions. |
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Ano de publicação: |
2020 |
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Fonte/Imprenta: |
Holzforschung, v. 74, n. 2, p. 175-183, Feb. 2020. |
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DOI: |
10.1515/hf-2018-0203 |
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Idioma: |
Inglês |
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Conteúdo: |
The substitution of phenol by lignin in phenol-formaldehyde (PF) resins is one of the most promising end uses of lignin valorization. Lignin from grasses and softwood has been the focus of the studies in this field as they present a higher number of theoretical reactive sites for resin synthesis. Herein we examined the composition and chemical reactivity of ?less-reactive? hardwood lignin fractions and their performance in PF resins, synthesized by substituting 50 wt% of the phenol with lignin. Before resin synthesis, the samples were hydroxymethylated and the maximum formaldehyde consumption was recorded. By doing so, we observed that hardwood fractions consumed formaldehyde close to the theoretical calculation, whereas the reference softwood lignin consumed only about ¼ of the theoretical value. In the resin synthesis, we added formaldehyde to the formulation according to the measured maximum formaldehyde consumption. Thus, low values of free formaldehyde in lignin-PF (LPF) resins were achieved (<0.23%). Moreover, the resin bonding strength displayed similar performance irrespective of whether the LPF resins were made with softwood or hardwood lignin (range of 3.4?4.8 N mm?2 at 150°C and 45?480 s of press time). Furthermore, we concluded that hardwood kraft lignins present no disadvantage compared to softwood lignins in PF resin applications, which have significant practical implications. |
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Palavras-Chave: |
Formaldehyde consumption; Formaldeído; Kraft; Phenolic resins; Reactive sites; Resina fenólica; Technical lignin. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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Marc: |
LEADER 02355naa a2200313 a 4500
001 2113225
005 2020-11-17
008 2020 bl uuuu u00u1 u #d
024 7 $a10.1515/hf-2018-0203$2DOI
100 1 $aLOURENÇON, T. V.
245 $aPhenol-formaldehyde resins with suitable bonding strength synthesized from "less-reactive" hardwood lignin fractions.$h[electronic resource]
260 $c2020
520 $aThe substitution of phenol by lignin in phenol-formaldehyde (PF) resins is one of the most promising end uses of lignin valorization. Lignin from grasses and softwood has been the focus of the studies in this field as they present a higher number of theoretical reactive sites for resin synthesis. Herein we examined the composition and chemical reactivity of ?less-reactive? hardwood lignin fractions and their performance in PF resins, synthesized by substituting 50 wt% of the phenol with lignin. Before resin synthesis, the samples were hydroxymethylated and the maximum formaldehyde consumption was recorded. By doing so, we observed that hardwood fractions consumed formaldehyde close to the theoretical calculation, whereas the reference softwood lignin consumed only about ¼ of the theoretical value. In the resin synthesis, we added formaldehyde to the formulation according to the measured maximum formaldehyde consumption. Thus, low values of free formaldehyde in lignin-PF (LPF) resins were achieved (<0.23%). Moreover, the resin bonding strength displayed similar performance irrespective of whether the LPF resins were made with softwood or hardwood lignin (range of 3.4?4.8 N mm?2 at 150°C and 45?480 s of press time). Furthermore, we concluded that hardwood kraft lignins present no disadvantage compared to softwood lignins in PF resin applications, which have significant practical implications.
653 $aFormaldehyde consumption
653 $aFormaldeído
653 $aKraft
653 $aPhenolic resins
653 $aReactive sites
653 $aResina fenólica
653 $aTechnical lignin
700 1 $aALAKURTII, S.
700 1 $aVIRTANEN, T.
700 1 $aJÄÄSKELÄINEN, A.-S.
700 1 $aLIITIÄ, T.
700 1 $aHUGHES, M.
700 1 $aMAGALHAES, W. L. E.
700 1 $aBOLZON DE MUNIZ, G. I.
700 1 $aTAMMINEN, T.
773 $tHolzforschung$gv. 74, n. 2, p. 175-183, Feb. 2020.
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