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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: |
21/05/2021 |
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Data da última atualização: |
02/06/2021 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
MATOS, M.; CLARO, F. C.; LIMA, T. A. M.; AVELINO, F.; HANSEL, F. A.; MACIEL, G. M.; LOMONACO, D.; MAGALHAES, W. L. E. |
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Afiliação: |
MAILSON MATOS, UNIVERSIDADE FEDERAL DO PARANA; FRANCINE C. CLARO, UNIVERSIDADE FEDERAL DO PARANA; TIELIDY A. M. LIMA, ATHLONE INSTITUTE OF TECHNOLOGY, IRELAND; FRANCISCO AVELINO, INSTITUTO FEDERAL DE EDUCAÇÃO, CIÊNCIA E TECNOLOGIA DO CEARÁ; FABRICIO AUGUSTO HANSEL, CNPF; GISELLE M. MACIEL, UNIVERSIDADE TECNOLÓGICA FEDERAL DO PARANÁ; DIEGO LOMONACO, UNIVERSIDADE FEDERAL DO CEARA; WASHINGTON LUIZ ESTEVES MAGALHAES, CNPF. |
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Título: |
Acetone: water fractionation of pyrolytic lignin improves its antioxidant and antibacterial activity. |
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Ano de publicação: |
2021 |
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Fonte/Imprenta: |
Journal of Analytical and Applied Pyrolysis, v. 156, 105175, 2021. |
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DOI: |
https://doi.org/10.1016/j.jaap.2021.105175 |
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Idioma: |
Inglês |
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Conteúdo: |
Pyrolytic lignin is the water-insoluble fraction of the bio-oil from rapid pyrolysis. The separation of pyrolytic lignin can improve the extraction of monophenols. Studies reveal the efficacy of phenolic aromatic compounds derived from lignin as antioxidants and as antimicrobials. In this study, we used aqueous acetone solutions to improve the fractionation of eucalypt pyrolytic lignin. Experiments to obtain the pyrolytic lignin were carried out based on a central composite factorial design, and the characterizations were performed by GPC, NMR, FTIR, TGA, GC?MS, antioxidant assays, and antibacterial activity analysis. The most soluble fraction resulted in a more homogeneous fraction, concentrating phenolic, carboxylic, and lower molecular weight compounds. The antioxidant activity was mainly attributed to phenolic compounds with methoxy substituents. Pyrolytic lignin fractions also showed antimicrobial action against Staphylococcus aureus and Escherichia coli. |
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Palavras-Chave: |
Antioxidant; Phenolic compound. |
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Thesagro: |
Acetona; Lignina. |
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Categoria do assunto: |
K Ciência Florestal e Produtos de Origem Vegetal |
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Marc: |
LEADER 01771naa a2200265 a 4500
001 2131936
005 2021-06-02
008 2021 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1016/j.jaap.2021.105175$2DOI
100 1 $aMATOS, M.
245 $aAcetone$bwater fractionation of pyrolytic lignin improves its antioxidant and antibacterial activity.$h[electronic resource]
260 $c2021
520 $aPyrolytic lignin is the water-insoluble fraction of the bio-oil from rapid pyrolysis. The separation of pyrolytic lignin can improve the extraction of monophenols. Studies reveal the efficacy of phenolic aromatic compounds derived from lignin as antioxidants and as antimicrobials. In this study, we used aqueous acetone solutions to improve the fractionation of eucalypt pyrolytic lignin. Experiments to obtain the pyrolytic lignin were carried out based on a central composite factorial design, and the characterizations were performed by GPC, NMR, FTIR, TGA, GC?MS, antioxidant assays, and antibacterial activity analysis. The most soluble fraction resulted in a more homogeneous fraction, concentrating phenolic, carboxylic, and lower molecular weight compounds. The antioxidant activity was mainly attributed to phenolic compounds with methoxy substituents. Pyrolytic lignin fractions also showed antimicrobial action against Staphylococcus aureus and Escherichia coli.
650 $aAcetona
650 $aLignina
653 $aAntioxidant
653 $aPhenolic compound
700 1 $aCLARO, F. C.
700 1 $aLIMA, T. A. M.
700 1 $aAVELINO, F.
700 1 $aHANSEL, F. A.
700 1 $aMACIEL, G. M.
700 1 $aLOMONACO, D.
700 1 $aMAGALHAES, W. L. E.
773 $tJournal of Analytical and Applied Pyrolysis$gv. 156, 105175, 2021.
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Registro original: |
Embrapa Florestas (CNPF) |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Cerrados. Para informações adicionais entre em contato com cpac.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Cerrados. |
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Data corrente: |
16/09/2020 |
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Data da última atualização: |
16/09/2020 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Circulação/Nível: |
A - 1 |
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Autoria: |
MUNIZ, D. H. de F.; MALAQUIAS, J. V.; LIMA, J. E. F. W.; OLIVEIRA FILHO, E. C. de. |
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Afiliação: |
DAPHNE HELOISA DE FREITAS MUNIZ, CPAC; JUACI VITORIA MALAQUIAS, CPAC; JORGE ENOCH FURQUIM WERNECK LIMA, CPAC; EDUARDO CYRINO DE OLIVEIRA FILHO, CPAC. |
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Título: |
Proposal of an irrigation water quality index (IWQI) for regional use in the Federal District, Brazil |
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Ano de publicação: |
2020 |
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Fonte/Imprenta: |
Environmental Monitoring and Assessment, v. 192, n. 607, 2020. |
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Páginas: |
15 p. |
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Idioma: |
Português |
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Conteúdo: |
Abstract The present study aimed to propose a water quality index (WQI) for the Federal District, Brazil, as a management tool for water resources used in irrigation. Irrigated agriculture is a sector that has been growing in the region, with a consequent demand for quality water. One strategy for assessing water quality in rural areas is to adopt monitoring programs, which generate a large amount of data that often needs to be synthesized. The use of indexes is a way of organizing data in a synthetic and easy to understand format. Although initially formulated to assess the quality of drinking water, it is believed that a similar logic can easily be applied to assess the quality of irrigation water. Studies that evaluate the quality of water for irrigation are very common in arid or semi-arid regions, due to the problems of saline water in the soil and crops. On the other hand, the microbiological approach to water is poorly investigated, since contamination of crops can pose a risk to food security. In this work, three water bodies were selected in rural areas due to their preponderant use: irrigation. The monitoring occurred between May 2012 and April 2013 in 9 sampling points. For each sample collected, 22 physical, chemical, and biological parameters were established. Principal component analysis (PCA) was used in the evaluation and selection of water quality variables to compose the WQI. From PCA, it was possible to reduce the number of parameters from 16 to 6 main ones that reflect the water resources characteristics in the region, which were pH, electrical conductivity, total hardness, sodium absorption ratio, nitrate, and Escherichia coli. Of the five classes proposed for WQI, two points were classified as “very good.” The other sample points were classified as “good” and “average” for the irrigation practice. The adapted WQI proved to be a good tool in the management of the water quality of the three rivers, and it can be easily used to assess the quality of water for irrigation in the region. MenosAbstract The present study aimed to propose a water quality index (WQI) for the Federal District, Brazil, as a management tool for water resources used in irrigation. Irrigated agriculture is a sector that has been growing in the region, with a consequent demand for quality water. One strategy for assessing water quality in rural areas is to adopt monitoring programs, which generate a large amount of data that often needs to be synthesized. The use of indexes is a way of organizing data in a synthetic and easy to understand format. Although initially formulated to assess the quality of drinking water, it is believed that a similar logic can easily be applied to assess the quality of irrigation water. Studies that evaluate the quality of water for irrigation are very common in arid or semi-arid regions, due to the problems of saline water in the soil and crops. On the other hand, the microbiological approach to water is poorly investigated, since contamination of crops can pose a risk to food security. In this work, three water bodies were selected in rural areas due to their preponderant use: irrigation. The monitoring occurred between May 2012 and April 2013 in 9 sampling points. For each sample collected, 22 physical, chemical, and biological parameters were established. Principal component analysis (PCA) was used in the evaluation and selection of water quality variables to compose the WQI. From PCA, it was possible to reduce the number of parameters from 16 to 6 main one... Mostrar Tudo |
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Palavras-Chave: |
Ferramenta de gestão; Índice de qualidade. |
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Thesagro: |
Irrigação; Recurso Hídrico. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 02731naa a2200217 a 4500
001 2124956
005 2020-09-16
008 2020 bl uuuu u00u1 u #d
100 1 $aMUNIZ, D. H. de F.
245 $aProposal of an irrigation water quality index (IWQI) for regional use in the Federal District, Brazil$h[electronic resource]
260 $c2020
300 $a15 p.
520 $aAbstract The present study aimed to propose a water quality index (WQI) for the Federal District, Brazil, as a management tool for water resources used in irrigation. Irrigated agriculture is a sector that has been growing in the region, with a consequent demand for quality water. One strategy for assessing water quality in rural areas is to adopt monitoring programs, which generate a large amount of data that often needs to be synthesized. The use of indexes is a way of organizing data in a synthetic and easy to understand format. Although initially formulated to assess the quality of drinking water, it is believed that a similar logic can easily be applied to assess the quality of irrigation water. Studies that evaluate the quality of water for irrigation are very common in arid or semi-arid regions, due to the problems of saline water in the soil and crops. On the other hand, the microbiological approach to water is poorly investigated, since contamination of crops can pose a risk to food security. In this work, three water bodies were selected in rural areas due to their preponderant use: irrigation. The monitoring occurred between May 2012 and April 2013 in 9 sampling points. For each sample collected, 22 physical, chemical, and biological parameters were established. Principal component analysis (PCA) was used in the evaluation and selection of water quality variables to compose the WQI. From PCA, it was possible to reduce the number of parameters from 16 to 6 main ones that reflect the water resources characteristics in the region, which were pH, electrical conductivity, total hardness, sodium absorption ratio, nitrate, and Escherichia coli. Of the five classes proposed for WQI, two points were classified as “very good.” The other sample points were classified as “good” and “average” for the irrigation practice. The adapted WQI proved to be a good tool in the management of the water quality of the three rivers, and it can be easily used to assess the quality of water for irrigation in the region.
650 $aIrrigação
650 $aRecurso Hídrico
653 $aFerramenta de gestão
653 $aÍndice de qualidade
700 1 $aMALAQUIAS, J. V.
700 1 $aLIMA, J. E. F. W.
700 1 $aOLIVEIRA FILHO, E. C. de
773 $tEnvironmental Monitoring and Assessment$gv. 192, n. 607, 2020.
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