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Registro Completo |
Biblioteca(s): |
Embrapa Soja. |
Data corrente: |
25/10/1993 |
Data da última atualização: |
21/06/2007 |
Autoria: |
XAVIER, F. E.; PINTO, J. J. O.; BRAUNER, G. L. |
Afiliação: |
EMBRAPA-UEPAE Pelotas, Cx. Postal 553, 96.100, Pelotas, RS. |
Título: |
Eficiencia de herbicidas pos-emergentes no controle das invasoras da soja (Glycine max (L.) Merr.). |
Ano de publicação: |
1983 |
Fonte/Imprenta: |
In: EMBRAPA. Unidade de Execucao de Pesquisa de Ambito Estadual de Pelotas (RS). Resultados de pesquisa de soja 1981/82. Pelotas, 1983. |
Páginas: |
p.190-193 |
Idioma: |
Português |
Palavras-Chave: |
Brasil; Echinochloa spp; Herbicide; Planta daninha; Rio Grande do Sul; Soybean; Weed. |
Thesagro: |
Controle Químico; Herbicida; Soja; Solanum Americanum. |
Thesaurus Nal: |
Brazil; chemical control. |
Categoria do assunto: |
-- |
Marc: |
LEADER 00893naa a2200301 a 4500 001 1455449 005 2007-06-21 008 1983 bl uuuu u00u1 u #d 100 1 $aXAVIER, F. E. 245 $aEficiencia de herbicidas pos-emergentes no controle das invasoras da soja (Glycine max (L.) Merr.). 260 $c1983 300 $ap.190-193 650 $aBrazil 650 $achemical control 650 $aControle Químico 650 $aHerbicida 650 $aSoja 650 $aSolanum Americanum 653 $aBrasil 653 $aEchinochloa spp 653 $aHerbicide 653 $aPlanta daninha 653 $aRio Grande do Sul 653 $aSoybean 653 $aWeed 700 1 $aPINTO, J. J. O. 700 1 $aBRAUNER, G. L. 773 $tIn: EMBRAPA. Unidade de Execucao de Pesquisa de Ambito Estadual de Pelotas (RS). Resultados de pesquisa de soja 1981/82. Pelotas, 1983.
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Registro original: |
Embrapa Soja (CNPSO) |
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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: |
04/03/2021 |
Data da última atualização: |
12/04/2021 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
A - 1 |
Autoria: |
ARTNER, M. A.; CADEMARTORI, P. H. G. de; AVELINO, F.; LEMONACO, D.; MAGALHAES, W. L. E. |
Afiliação: |
Mirela Angelita Artner, PIPE - UFPR; Pedro Henrique Gonzalez de Cademartori, UFPR; Francisco Avelino, Instituto Federal de Educação, Ciência e Tecnologia do Ceará; Diego Lomonaco, Universidade Federal do Ceará; WASHINGTON LUIZ ESTEVES MAGALHAES, CNPF. |
Título: |
A novel design for nanocellulose reinforced urea-formaldehyde resin: a breakthrough in amino resin synthesis and biocomposite manufacturing. |
Ano de publicação: |
2021 |
Fonte/Imprenta: |
Cellulose, v. 28, n. 6, p. 3435–3450, Apr. 2021. |
DOI: |
https://doi.org/10.1007/s10570-021-03739-4 |
Idioma: |
Inglês |
Conteúdo: |
Urea?formaldehyde (UF) resins are often reinforced with natural fibers or nanostructures such as cellulose microfibrils (CMFs) to improve their mechanical and physical properties in wood panels. However, the high-water content in these suspensions is a limitation on applications in thermosetting resins. The innovative technology investigated here consists of the in-situ production of a methanediol-based suspension of CMFs through a mechanical process and its incorporation during resin synthesis. We sought to maintain the physicochemical properties and the basic chemical composition of the resin. The synergy between the resin and CMFs provided a shielding effect and a greater storage modulus (E?). We demonstrate that this approach is robust through standard viscoelastic, physical, and mechanical tests. Likewise, a methanediol-based CMF suspension used to synthesize UF resin was effective to reduce formaldehyde emission during the resin cure reactions. Finally, the bio-based composites manufactured with this UF resin containing CMF had better performance due to increased internal bond strength by up to 15%, reduced water absorption by up to 8%, and reduced formaldehyde emission by 30% at environmental temperature. |
Palavras-Chave: |
Celulose microfibrilada; Microfibrillated cellulose; Nanocellulose; Nanocelulose; Urea formaldehyde resin; Ureia formaldeído; Wood panels. |
Thesagro: |
Painel de Madeira; Resina. |
Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
Marc: |
LEADER 02168naa a2200289 a 4500 001 2130463 005 2021-04-12 008 2021 bl uuuu u00u1 u #d 024 7 $ahttps://doi.org/10.1007/s10570-021-03739-4$2DOI 100 1 $aARTNER, M. A. 245 $aA novel design for nanocellulose reinforced urea-formaldehyde resin$ba breakthrough in amino resin synthesis and biocomposite manufacturing.$h[electronic resource] 260 $c2021 520 $aUrea?formaldehyde (UF) resins are often reinforced with natural fibers or nanostructures such as cellulose microfibrils (CMFs) to improve their mechanical and physical properties in wood panels. However, the high-water content in these suspensions is a limitation on applications in thermosetting resins. The innovative technology investigated here consists of the in-situ production of a methanediol-based suspension of CMFs through a mechanical process and its incorporation during resin synthesis. We sought to maintain the physicochemical properties and the basic chemical composition of the resin. The synergy between the resin and CMFs provided a shielding effect and a greater storage modulus (E?). We demonstrate that this approach is robust through standard viscoelastic, physical, and mechanical tests. Likewise, a methanediol-based CMF suspension used to synthesize UF resin was effective to reduce formaldehyde emission during the resin cure reactions. Finally, the bio-based composites manufactured with this UF resin containing CMF had better performance due to increased internal bond strength by up to 15%, reduced water absorption by up to 8%, and reduced formaldehyde emission by 30% at environmental temperature. 650 $aPainel de Madeira 650 $aResina 653 $aCelulose microfibrilada 653 $aMicrofibrillated cellulose 653 $aNanocellulose 653 $aNanocelulose 653 $aUrea formaldehyde resin 653 $aUreia formaldeído 653 $aWood panels 700 1 $aCADEMARTORI, P. H. G. de 700 1 $aAVELINO, F. 700 1 $aLEMONACO, D. 700 1 $aMAGALHAES, W. L. E. 773 $tCellulose$gv. 28, n. 6, p. 3435–3450, Apr. 2021.
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