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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. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
01/10/2015 |
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Data da última atualização: |
29/01/2018 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
LOURENÇON, T. V.; HANSEL, F. A.; SILVA, T. A. da; RAMOS, L. P.; BOLZON DE MUNIZ, G. I.; MAGALHAES, W. L. E. |
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Afiliação: |
TAINISE V. LOURENÇON, Doutoranda UFPR; FABRICIO AUGUSTO HANSEL, CNPF; THIAGO A. DA SILVA, UFPR; LUIZ P. RAMOS, UFPR; GRACIELA I. BOLZON DE MUNIZ, UFPR; WASHINGTON LUIZ ESTEVES MAGALHAES, CNPF. |
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Título: |
Hardwood and softwood kraft lignins fractionation by simple sequential acid precipitation. |
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Ano de publicação: |
2015 |
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Fonte/Imprenta: |
Separation and Purification Technology, v. 154, p. 82-88, Nov. 2015. |
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DOI: |
http://dx.doi.org/10.1016/j.seppur.2015.09.015 |
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Idioma: |
Inglês |
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Conteúdo: |
This study aimed at the fractionation of lignin by a simple acid precipitation from hardwood and softwood Kraft black liquors to propose new value-added applications. The precipitation was made sequentially by acidification at five different pHs (9, 7, 5, 3 and 1). The different lignin fractions were analyzed in terms of yield, ash content, elemental analysis, thermal analysis, FTIR, 1H NMR and GPC. Hardwood lignins showed distinct relative molecular mass distributions, while softwood lignins showed similar relative molecular mass distributions in the three fractions obtained at higher pHs (pH 9, 7 and 5). This simple acid precipitation was shown to be an effective method to obtain relatively high yields of lignin. Molecular characterization by FTIR (carbonyl band) indicated that hardwood lignin was most oxidized mainly in the low pH fractions (5, 3 and 1), while the softwood lignin only presented discrete oxidized products in the lowest pHs (3 and 1). Interestingly, precipitation at pH 3 produced ash-free hardwood and softwood lignin fractions, which is a valuable product for the development of better end uses. |
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Thesagro: |
Eucalipto; Lignina; Madeira. |
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Thesaurus Nal: |
Pinus. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 01868naa a2200241 a 4500
001 2025645
005 2018-01-29
008 2015 bl uuuu u00u1 u #d
024 7 $ahttp://dx.doi.org/10.1016/j.seppur.2015.09.015$2DOI
100 1 $aLOURENÇON, T. V.
245 $aHardwood and softwood kraft lignins fractionation by simple sequential acid precipitation.$h[electronic resource]
260 $c2015
520 $aThis study aimed at the fractionation of lignin by a simple acid precipitation from hardwood and softwood Kraft black liquors to propose new value-added applications. The precipitation was made sequentially by acidification at five different pHs (9, 7, 5, 3 and 1). The different lignin fractions were analyzed in terms of yield, ash content, elemental analysis, thermal analysis, FTIR, 1H NMR and GPC. Hardwood lignins showed distinct relative molecular mass distributions, while softwood lignins showed similar relative molecular mass distributions in the three fractions obtained at higher pHs (pH 9, 7 and 5). This simple acid precipitation was shown to be an effective method to obtain relatively high yields of lignin. Molecular characterization by FTIR (carbonyl band) indicated that hardwood lignin was most oxidized mainly in the low pH fractions (5, 3 and 1), while the softwood lignin only presented discrete oxidized products in the lowest pHs (3 and 1). Interestingly, precipitation at pH 3 produced ash-free hardwood and softwood lignin fractions, which is a valuable product for the development of better end uses.
650 $aPinus
650 $aEucalipto
650 $aLignina
650 $aMadeira
700 1 $aHANSEL, F. A.
700 1 $aSILVA, T. A. da
700 1 $aRAMOS, L. P.
700 1 $aBOLZON DE MUNIZ, G. I.
700 1 $aMAGALHAES, W. L. E.
773 $tSeparation and Purification Technology$gv. 154, p. 82-88, Nov. 2015.
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Embrapa Florestas (CNPF) |
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Registro Completo
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Biblioteca(s): |
Embrapa Unidades Centrais. |
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Data corrente: |
13/11/2015 |
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Data da última atualização: |
17/09/2019 |
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Autoria: |
NEPOMUCENO, A. L.; LOPES, M. A.; FINARDI-FILHO, F.; COELHO, M. V. S.; FUGANTI-PAGLIARINI, R. |
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Afiliação: |
ALEXANDRE LIMA NEPOMUCENO, SRI; MAURICIO ANTONIO LOPES, DE-PR. |
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Título: |
Biosafety legislation and the use of GM crops in Brazil. |
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Ano de publicação: |
2014 |
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Fonte/Imprenta: |
Journal of Huazhong Agricultural University, v. 33, n. 6, p. 40-45, 2014. |
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Idioma: |
Inglês |
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Conteúdo: |
Thirty-eight GM crop events are currently approved for commercial use in Brazil,where their intrinsic characteristics include herbicide,insect and virus resistance.The Brazilian Biosafety Law establishes guidelines for the safe use of genetic engineering technologies in research and product development for the market.The Law created a structure with collegiate and governmental agencies for the establishment of biosafety guidelines,risk assessment,official inspections.It created the National Biosafety Council(CNBS),and restructured the National Biosafety Technical Commission(CTNBio).The CTNBio is responsible for establishing the biosafety guidelines and to issue the Biosafety Quality Certificate(CQB)for all institutions working with GMO.The Brazilian Biosafety Law considers an infringement of the legislation any action or omission that violates the norms provided by it.Many sanctions can be applied where the Registration and Inspection agencies(OERF)define criteria,fine amounts,and collect it for the federal government.Other important Brazilian legislation regarding GMO use in Brazil is the Law n°8 078 which establishes the right to information for all consumers in the country.Through thisLaw,Brazilian Ministry of Justice defined a labeling system whereby foods and food ingredients for human consumption or animal feed containing or produced with more than 1% GMO must contain information on its label and a symbol(ayellow triangle with a T in the middle)indicating it.It is undeniable that there was a rapid increase in the utilization of genetic engineering technologies in the Brazilian agriculture after the new Biosafety Law.The unification of laws,rules and guidelines by all agencies involved in the Biosafety legislation framework allowed,undoubtedly,the rescue of the confidence by investors,researchers,private/public institutions,and by all other stakeholders involved in the Brazilian agribusiness. MenosThirty-eight GM crop events are currently approved for commercial use in Brazil,where their intrinsic characteristics include herbicide,insect and virus resistance.The Brazilian Biosafety Law establishes guidelines for the safe use of genetic engineering technologies in research and product development for the market.The Law created a structure with collegiate and governmental agencies for the establishment of biosafety guidelines,risk assessment,official inspections.It created the National Biosafety Council(CNBS),and restructured the National Biosafety Technical Commission(CTNBio).The CTNBio is responsible for establishing the biosafety guidelines and to issue the Biosafety Quality Certificate(CQB)for all institutions working with GMO.The Brazilian Biosafety Law considers an infringement of the legislation any action or omission that violates the norms provided by it.Many sanctions can be applied where the Registration and Inspection agencies(OERF)define criteria,fine amounts,and collect it for the federal government.Other important Brazilian legislation regarding GMO use in Brazil is the Law n°8 078 which establishes the right to information for all consumers in the country.Through thisLaw,Brazilian Ministry of Justice defined a labeling system whereby foods and food ingredients for human consumption or animal feed containing or produced with more than 1% GMO must contain information on its label and a symbol(ayellow triangle with a T in the middle)indicating it.It is unde... Mostrar Tudo |
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Palavras-Chave: |
Biosafety law; Biosafety policy; Biosafety quality certificat; Legislation; Registration and inspection agencies; Transgenic. |
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Thesagro: |
Biossegurança; Legislação; Milho. |
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Thesaurus NAL: |
biosafety; crops. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02792naa a2200301 a 4500
001 2028542
005 2019-09-17
008 2014 bl uuuu u00u1 u #d
100 1 $aNEPOMUCENO, A. L.
245 $aBiosafety legislation and the use of GM crops in Brazil.$h[electronic resource]
260 $c2014
520 $aThirty-eight GM crop events are currently approved for commercial use in Brazil,where their intrinsic characteristics include herbicide,insect and virus resistance.The Brazilian Biosafety Law establishes guidelines for the safe use of genetic engineering technologies in research and product development for the market.The Law created a structure with collegiate and governmental agencies for the establishment of biosafety guidelines,risk assessment,official inspections.It created the National Biosafety Council(CNBS),and restructured the National Biosafety Technical Commission(CTNBio).The CTNBio is responsible for establishing the biosafety guidelines and to issue the Biosafety Quality Certificate(CQB)for all institutions working with GMO.The Brazilian Biosafety Law considers an infringement of the legislation any action or omission that violates the norms provided by it.Many sanctions can be applied where the Registration and Inspection agencies(OERF)define criteria,fine amounts,and collect it for the federal government.Other important Brazilian legislation regarding GMO use in Brazil is the Law n°8 078 which establishes the right to information for all consumers in the country.Through thisLaw,Brazilian Ministry of Justice defined a labeling system whereby foods and food ingredients for human consumption or animal feed containing or produced with more than 1% GMO must contain information on its label and a symbol(ayellow triangle with a T in the middle)indicating it.It is undeniable that there was a rapid increase in the utilization of genetic engineering technologies in the Brazilian agriculture after the new Biosafety Law.The unification of laws,rules and guidelines by all agencies involved in the Biosafety legislation framework allowed,undoubtedly,the rescue of the confidence by investors,researchers,private/public institutions,and by all other stakeholders involved in the Brazilian agribusiness.
650 $abiosafety
650 $acrops
650 $aBiossegurança
650 $aLegislação
650 $aMilho
653 $aBiosafety law
653 $aBiosafety policy
653 $aBiosafety quality certificat
653 $aLegislation
653 $aRegistration and inspection agencies
653 $aTransgenic
700 1 $aLOPES, M. A.
700 1 $aFINARDI-FILHO, F.
700 1 $aCOELHO, M. V. S.
700 1 $aFUGANTI-PAGLIARINI, R.
773 $tJournal of Huazhong Agricultural University$gv. 33, n. 6, p. 40-45, 2014.
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