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 | Acesso ao texto completo restrito à biblioteca da Embrapa Solos. Para informações adicionais entre em contato com cnps.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Solos. |
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Data corrente: |
23/03/2012 |
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Data da última atualização: |
06/06/2013 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
COUTINHO, H. L. da C.; BARRIOS, E. |
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Afiliação: |
HEITOR LUIZ DA COSTA COUTINHO, CNPS; Edmundo Barrios. |
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Título: |
Fostering knowledge sharing for integrated natural resource management and adaptation to global change in agricultutal landscapes of Brazil. |
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Ano de publicação: |
2011 |
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Fonte/Imprenta: |
In: INTERNATIONAL SCIENCE AND POLICY CONFERENCE, 2. 11-16 Mar. 2011, Tempe, Arizona. RESILIENCE 2011: resilience, innovation, and sustainability, navigating the complexities of global change. Arizona State University: Arizona, 2011. |
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Idioma: |
Inglês |
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Conteúdo: |
Socio-ecological systems can greatly bene?t from integrative approaches that combine formal and informal knowledge to address current sustainability problems associated with global change. The increasing attention paid to local knowledge in recent years results from the recognition that the knowledge of people who have been closely interacting with their environment for a long time can o?er many insights about the sustainable management of natural resources. Participatory methodologies used to develop a ?hybrid? knowledge base, combining local and scienti?c knowledge, re?ect an e?ort to understand the complexity of the land management decision making to promote and protect multifunctional land uses. Increased concern about soil management as a key determinant of sustainability in agricultural landscapes has led to the identi?cation of early warning indicators to monitor changes in soil health, and their impact in the provision of ecosystem services, as a?ected by land use change and agricultural intensi?cation. This is part of a continuing e?ort to develop land health monitoring systems that strengthen local environmental/agricultural institutions and communities with tools that support local decision-making in natural resource management and promote sustainable land use in agricultural landscapes. Development of this participatory research approach has undergone several rounds of South-South collaboration and it is currently being adapted and further developed in Brazil as part of a CIAT/Embrapa/ ICRAF collaborative project with ?nancial support from CNPq and Embrapa. MenosSocio-ecological systems can greatly bene?t from integrative approaches that combine formal and informal knowledge to address current sustainability problems associated with global change. The increasing attention paid to local knowledge in recent years results from the recognition that the knowledge of people who have been closely interacting with their environment for a long time can o?er many insights about the sustainable management of natural resources. Participatory methodologies used to develop a ?hybrid? knowledge base, combining local and scienti?c knowledge, re?ect an e?ort to understand the complexity of the land management decision making to promote and protect multifunctional land uses. Increased concern about soil management as a key determinant of sustainability in agricultural landscapes has led to the identi?cation of early warning indicators to monitor changes in soil health, and their impact in the provision of ecosystem services, as a?ected by land use change and agricultural intensi?cation. This is part of a continuing e?ort to develop land health monitoring systems that strengthen local environmental/agricultural institutions and communities with tools that support local decision-making in natural resource management and promote sustainable land use in agricultural landscapes. Development of this participatory research approach has undergone several rounds of South-South collaboration and it is currently being adapted and further developed in Brazil as ... Mostrar Tudo |
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Palavras-Chave: |
Agricultural. |
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Thesaurus Nal: |
landscapes. |
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Categoria do assunto: |
P Recursos Naturais, Ciências Ambientais e da Terra |
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Marc: |
LEADER 02284nam a2200145 a 4500
001 1920104
005 2013-06-06
008 2011 bl uuuu u00u1 u #d
100 1 $aCOUTINHO, H. L. da C.
245 $aFostering knowledge sharing for integrated natural resource management and adaptation to global change in agricultutal landscapes of Brazil.$h[electronic resource]
260 $aIn: INTERNATIONAL SCIENCE AND POLICY CONFERENCE, 2. 11-16 Mar. 2011, Tempe, Arizona. RESILIENCE 2011: resilience, innovation, and sustainability, navigating the complexities of global change. Arizona State University: Arizona$c2011
520 $aSocio-ecological systems can greatly bene?t from integrative approaches that combine formal and informal knowledge to address current sustainability problems associated with global change. The increasing attention paid to local knowledge in recent years results from the recognition that the knowledge of people who have been closely interacting with their environment for a long time can o?er many insights about the sustainable management of natural resources. Participatory methodologies used to develop a ?hybrid? knowledge base, combining local and scienti?c knowledge, re?ect an e?ort to understand the complexity of the land management decision making to promote and protect multifunctional land uses. Increased concern about soil management as a key determinant of sustainability in agricultural landscapes has led to the identi?cation of early warning indicators to monitor changes in soil health, and their impact in the provision of ecosystem services, as a?ected by land use change and agricultural intensi?cation. This is part of a continuing e?ort to develop land health monitoring systems that strengthen local environmental/agricultural institutions and communities with tools that support local decision-making in natural resource management and promote sustainable land use in agricultural landscapes. Development of this participatory research approach has undergone several rounds of South-South collaboration and it is currently being adapted and further developed in Brazil as part of a CIAT/Embrapa/ ICRAF collaborative project with ?nancial support from CNPq and Embrapa.
650 $alandscapes
653 $aAgricultural
700 1 $aBARRIOS, E.
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Registro original: |
Embrapa Solos (CNPS) |
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| Acesso ao texto completo restrito à biblioteca da Embrapa Amazônia Oriental. Para informações adicionais entre em contato com cpatu.biblioteca@embrapa.br. |
Registro Completo
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Biblioteca(s): |
Embrapa Amazônia Oriental. |
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Data corrente: |
08/09/2017 |
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Data da última atualização: |
20/05/2022 |
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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: |
DUARTE JUNIOR, A. P.; TAVARES, E. J. M.; ALVES, T. V. G.; MOURA, M. R. de; COSTA, C. E. F. da; SILVA JÚNIOR, J. O. C.; COSTA, R. M. R. |
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Afiliação: |
Anivaldo Pereira Duarte Junior, UFPA; ERALDO JOSE MADUREIRA TAVARES, CPATU; Taís Vanessa Gabbay Alves, UFPA; Márcia Regina de Moura, UNESP; Carlos Emmerson Ferreira da Costa, UFPA; José Otávio Carréra Silva Júnior, UFPA; Roseane Maria Ribeiro Costa, UFPA. |
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Título: |
Chitosan nanoparticles as a modified diclofenac drug release system. |
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Ano de publicação: |
2017 |
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Fonte/Imprenta: |
Journal of Nanoparticle Research, v. 19, n. 8, article 274, 2017. |
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DOI: |
10.1007/s11051-017-3968-6 |
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Idioma: |
Inglês |
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Conteúdo: |
This study evaluated a modified nanostructured release system employing diclofenac as a drug model. Biodegradable chitosan nanoparticles were prepared with chitosan concentrations between 0.5 and 0.8% ( w/ v) by template polymerization method using methacrylic acid in aqueous solution. Chitosan-poly(methacrylic acid) (CS-PMAA) nanoparticles showed uniform size around 50?100 nm, homogeneous morphology, and spherical shape. Raw material and chitosan nanoparticles were characterized by thermal analysis, Fourier transform infrared spectroscopy (FT-IR), and transmission electron microscopy (TEM), confirming the interaction between chitosan and methacrylic acid during nanoparticles preparation. Diclofenac sorption on the chitosan nanoparticles surface was achieved by incubation in water/ethanol (1:1) drug solution in concentrations of 0.5 and 0.8 mg/mL. The diclofenac amount sorbed per gram of CS-PMAA nanoparticles, when in a 0.5 mg/mL sodium diclofenac solution, was as follows: 12.93, 15, 20.87, and 29.63 mg/g for CS-PMAA nanoparticles 0.5, 0.6, 0.7, and 0.8% ( w/ v), respectively. When a 0.8 mg/mL sodium diclofenac solution was used, higher sorption efficiencies were obtained: For CS-PMAA nanoparticles with chitosan concentrations of 0.5, 0.6, 0.7, and 0.8% ( w/ v), the sorption efficiencies were 33.39, 49.58, 55.23, and 67.2 mg/g, respectively. Diclofenac sorption kinetics followed a second-order kinetics. Drug release from nanoparticles occurred in a period of up to 48 h and obeyed Korsmeyer-Peppas model, which was characterized mainly by Fickian diffusion transport. MenosThis study evaluated a modified nanostructured release system employing diclofenac as a drug model. Biodegradable chitosan nanoparticles were prepared with chitosan concentrations between 0.5 and 0.8% ( w/ v) by template polymerization method using methacrylic acid in aqueous solution. Chitosan-poly(methacrylic acid) (CS-PMAA) nanoparticles showed uniform size around 50?100 nm, homogeneous morphology, and spherical shape. Raw material and chitosan nanoparticles were characterized by thermal analysis, Fourier transform infrared spectroscopy (FT-IR), and transmission electron microscopy (TEM), confirming the interaction between chitosan and methacrylic acid during nanoparticles preparation. Diclofenac sorption on the chitosan nanoparticles surface was achieved by incubation in water/ethanol (1:1) drug solution in concentrations of 0.5 and 0.8 mg/mL. The diclofenac amount sorbed per gram of CS-PMAA nanoparticles, when in a 0.5 mg/mL sodium diclofenac solution, was as follows: 12.93, 15, 20.87, and 29.63 mg/g for CS-PMAA nanoparticles 0.5, 0.6, 0.7, and 0.8% ( w/ v), respectively. When a 0.8 mg/mL sodium diclofenac solution was used, higher sorption efficiencies were obtained: For CS-PMAA nanoparticles with chitosan concentrations of 0.5, 0.6, 0.7, and 0.8% ( w/ v), the sorption efficiencies were 33.39, 49.58, 55.23, and 67.2 mg/g, respectively. Diclofenac sorption kinetics followed a second-order kinetics. Drug release from nanoparticles occurred in a period of up to 48 h and o... Mostrar Tudo |
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Palavras-Chave: |
Biopolímero; Nanopartícula; Nanotecnologia; Quitosana. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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Marc: |
LEADER 02347naa a2200253 a 4500
001 2075279
005 2022-05-20
008 2017 bl uuuu u00u1 u #d
024 7 $a10.1007/s11051-017-3968-6$2DOI
100 1 $aDUARTE JUNIOR, A. P.
245 $aChitosan nanoparticles as a modified diclofenac drug release system.$h[electronic resource]
260 $c2017
520 $aThis study evaluated a modified nanostructured release system employing diclofenac as a drug model. Biodegradable chitosan nanoparticles were prepared with chitosan concentrations between 0.5 and 0.8% ( w/ v) by template polymerization method using methacrylic acid in aqueous solution. Chitosan-poly(methacrylic acid) (CS-PMAA) nanoparticles showed uniform size around 50?100 nm, homogeneous morphology, and spherical shape. Raw material and chitosan nanoparticles were characterized by thermal analysis, Fourier transform infrared spectroscopy (FT-IR), and transmission electron microscopy (TEM), confirming the interaction between chitosan and methacrylic acid during nanoparticles preparation. Diclofenac sorption on the chitosan nanoparticles surface was achieved by incubation in water/ethanol (1:1) drug solution in concentrations of 0.5 and 0.8 mg/mL. The diclofenac amount sorbed per gram of CS-PMAA nanoparticles, when in a 0.5 mg/mL sodium diclofenac solution, was as follows: 12.93, 15, 20.87, and 29.63 mg/g for CS-PMAA nanoparticles 0.5, 0.6, 0.7, and 0.8% ( w/ v), respectively. When a 0.8 mg/mL sodium diclofenac solution was used, higher sorption efficiencies were obtained: For CS-PMAA nanoparticles with chitosan concentrations of 0.5, 0.6, 0.7, and 0.8% ( w/ v), the sorption efficiencies were 33.39, 49.58, 55.23, and 67.2 mg/g, respectively. Diclofenac sorption kinetics followed a second-order kinetics. Drug release from nanoparticles occurred in a period of up to 48 h and obeyed Korsmeyer-Peppas model, which was characterized mainly by Fickian diffusion transport.
653 $aBiopolímero
653 $aNanopartícula
653 $aNanotecnologia
653 $aQuitosana
700 1 $aTAVARES, E. J. M.
700 1 $aALVES, T. V. G.
700 1 $aMOURA, M. R. de
700 1 $aCOSTA, C. E. F. da
700 1 $aSILVA JÚNIOR, J. O. C.
700 1 $aCOSTA, R. M. R.
773 $tJournal of Nanoparticle Research$gv. 19, n. 8, article 274, 2017.
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