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Registro Completo |
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Biblioteca(s): |
Embrapa Meio Ambiente. |
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Data corrente: |
10/01/2019 |
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Data da última atualização: |
10/01/2019 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
MEDEIROS, A. M. Z.; KHAN, L. U.; DELITE, F. S.; COSTA, C. A.; OSPINA, C. A.; ALVES, O. L.; CASTRO, V. L. S. S. de; MARTINEZ, D. S. T. |
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Afiliação: |
Aline M.Z. MEDEIROS, Brazilian Nanotechnology National Laboratory (LNNano), Brazilian Center for Research in Energy and Materials (CNPEM), Campinas, Brazil; (2) Center for Nuclear Energy in Agriculture (CENA), University of São Paulo (USP); Latif U. Khan, Brazilian Nanotechnology National Laboratory (LNNano), Brazilian Center for Research in Energy and Materials (CNPEM); Fabricio S. Delite, Brazilian Nanotechnology National Laboratory (LNNano), Brazilian Center for Research in Energy and Materials (CNPEM); Carlos A. Costa, Brazilian Nanotechnology National Laboratory (LNNano), Brazilian Center for Research in Energy and Materials (CNPEM); Carlos A. Ospina, Brazilian Nanotechnology National Laboratory (LNNano), Brazilian Center for Research in Energy and Materials (CNPEM); Oswaldo L. Alves, Brazilian Nanotechnology National Laboratory (LNNano), Brazilian Center for Research in Energy and Materials (CNPEM); Laboratoy of Solid State Chemistry (LQES) and NanoBioss Laboratory/UNICAMP; VERA LUCIA SCHERHOLZ S DE CASTRO, CNPMA; Diego S. T. Martinez, Brazilian Nanotechnology National Laboratory (LNNano), Brazilian Center for Research in Energy and Materials (CNPEM): Center for Nuclear Energy in Agriculture (CENA), University of São Paulo (USP). |
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Título: |
Nanoecotoxicity of GO@AgNPs nanohybrid on zebrafish embryos: influence of natural organic matter and chorion membrane removal. |
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Ano de publicação: |
2018 |
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Fonte/Imprenta: |
In: INTERNATIONAL CONFERENCE ON HEALTH AND SAFETY ISSUES RELATED TO NANOMATERIALS FOR A SOCIALLY RESPONSIBLE APPROACH - NANOSAFE, 6., 2018, Grenoble. Book of Abstracts... Grenoble: 2018. Ref. A91883DM. |
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Páginas: |
p. 116. |
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Idioma: |
Português |
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Conteúdo: |
Single-layer graphene oxide decorated with silver nanoparticles (GO@AgNPs) nanohybrid is an emerging material to applications in nanotechnology such as catalysis, biosensors, composites, and antimicrobial materials. However, it is necessary to assess the potential risks of this nanohybrid material to environmental health. In aquatic environment, the nanomaterials can interact with natural organic matter (NOM), modifying their colloidal stability and consequently, change their effects on organisms. Here, we evaluated the nanoecotoxicity of GO@AgNPs on Zebrafish (Danio rerio) embryos in presence and absence of NOM. The GO@AgNPs nanohybrid material was synthetized by reducing AgNO3 with Na3C6H5O7 (sodium citrate) in the presence of GO. The nanohybrid was characterized by TEM, AFM, TGA, and XPS techniques. The colloidal stability of nanohybrid in zebrafish medium was monitored by UV-vis spectroscopy. The 24 hours post-fertilization (hpf) embryos were exposed during 96 hours to 0.5, 1.0, 2.5, 5.0 mg.L-1 GO@AgNPs, in presence or absence of NOM (Suwannee River NOM, 20 mg.L-1), with and without chorion barrier membrane. The positive and negative control groups? exposure were also performed. The fish embryo toxicity (FET) test showed the increase of deleterious effects on embryos with increase in concentration of nanohybrid material. This toxic effect was more severe in the embryos exposed without chorion. Its removal usually started the exposition of embryos to toxic materials in early phase. However, the presence of NOM mitigates the deleterious effects, revealing the antidotal proprieties of NOM for GO@AgNPs (Figure 1). These findings showed the critical influence of chorion membrane and NOM in the modulation of the adverse effects of GO@AgNP nanohybrid material on zebrafish model. MenosSingle-layer graphene oxide decorated with silver nanoparticles (GO@AgNPs) nanohybrid is an emerging material to applications in nanotechnology such as catalysis, biosensors, composites, and antimicrobial materials. However, it is necessary to assess the potential risks of this nanohybrid material to environmental health. In aquatic environment, the nanomaterials can interact with natural organic matter (NOM), modifying their colloidal stability and consequently, change their effects on organisms. Here, we evaluated the nanoecotoxicity of GO@AgNPs on Zebrafish (Danio rerio) embryos in presence and absence of NOM. The GO@AgNPs nanohybrid material was synthetized by reducing AgNO3 with Na3C6H5O7 (sodium citrate) in the presence of GO. The nanohybrid was characterized by TEM, AFM, TGA, and XPS techniques. The colloidal stability of nanohybrid in zebrafish medium was monitored by UV-vis spectroscopy. The 24 hours post-fertilization (hpf) embryos were exposed during 96 hours to 0.5, 1.0, 2.5, 5.0 mg.L-1 GO@AgNPs, in presence or absence of NOM (Suwannee River NOM, 20 mg.L-1), with and without chorion barrier membrane. The positive and negative control groups? exposure were also performed. The fish embryo toxicity (FET) test showed the increase of deleterious effects on embryos with increase in concentration of nanohybrid material. This toxic effect was more severe in the embryos exposed without chorion. Its removal usually started the exposition of embryos to toxic materials in ea... Mostrar Tudo |
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Palavras-Chave: |
Nanoecotoxicity; Zebrafish embryo. |
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Thesaurus Nal: |
Chorion; Organic matter. |
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Categoria do assunto: |
W Química e Física |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/190151/1/RA-CastroVLSS-Nanosafe2018-p116.pdf
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Marc: |
LEADER 02734nam a2200253 a 4500
001 2103503
005 2019-01-10
008 2018 bl uuuu u00u1 u #d
100 1 $aMEDEIROS, A. M. Z.
245 $aNanoecotoxicity of GO@AgNPs nanohybrid on zebrafish embryos$binfluence of natural organic matter and chorion membrane removal.$h[electronic resource]
260 $aIn: INTERNATIONAL CONFERENCE ON HEALTH AND SAFETY ISSUES RELATED TO NANOMATERIALS FOR A SOCIALLY RESPONSIBLE APPROACH - NANOSAFE, 6., 2018, Grenoble. Book of Abstracts... Grenoble: 2018. Ref. A91883DM.$c2018
300 $ap. 116.
520 $aSingle-layer graphene oxide decorated with silver nanoparticles (GO@AgNPs) nanohybrid is an emerging material to applications in nanotechnology such as catalysis, biosensors, composites, and antimicrobial materials. However, it is necessary to assess the potential risks of this nanohybrid material to environmental health. In aquatic environment, the nanomaterials can interact with natural organic matter (NOM), modifying their colloidal stability and consequently, change their effects on organisms. Here, we evaluated the nanoecotoxicity of GO@AgNPs on Zebrafish (Danio rerio) embryos in presence and absence of NOM. The GO@AgNPs nanohybrid material was synthetized by reducing AgNO3 with Na3C6H5O7 (sodium citrate) in the presence of GO. The nanohybrid was characterized by TEM, AFM, TGA, and XPS techniques. The colloidal stability of nanohybrid in zebrafish medium was monitored by UV-vis spectroscopy. The 24 hours post-fertilization (hpf) embryos were exposed during 96 hours to 0.5, 1.0, 2.5, 5.0 mg.L-1 GO@AgNPs, in presence or absence of NOM (Suwannee River NOM, 20 mg.L-1), with and without chorion barrier membrane. The positive and negative control groups? exposure were also performed. The fish embryo toxicity (FET) test showed the increase of deleterious effects on embryos with increase in concentration of nanohybrid material. This toxic effect was more severe in the embryos exposed without chorion. Its removal usually started the exposition of embryos to toxic materials in early phase. However, the presence of NOM mitigates the deleterious effects, revealing the antidotal proprieties of NOM for GO@AgNPs (Figure 1). These findings showed the critical influence of chorion membrane and NOM in the modulation of the adverse effects of GO@AgNP nanohybrid material on zebrafish model.
650 $aChorion
650 $aOrganic matter
653 $aNanoecotoxicity
653 $aZebrafish embryo
700 1 $aKHAN, L. U.
700 1 $aDELITE, F. S.
700 1 $aCOSTA, C. A.
700 1 $aOSPINA, C. A.
700 1 $aALVES, O. L.
700 1 $aCASTRO, V. L. S. S. de
700 1 $aMARTINEZ, D. S. T.
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Registro original: |
Embrapa Meio Ambiente (CNPMA) |
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Registro Completo
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Biblioteca(s): |
Embrapa Semiárido. |
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Data corrente: |
24/08/2001 |
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Data da última atualização: |
20/05/2019 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
ARAUJO, J. L. P.; GARCIA, J. L. L; CORREIA, R. C. |
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Afiliação: |
JOSE LINCOLN PINHEIRO ARAUJO, CPATSA; REBERT COELHO CORREIA, CPATSA. |
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Título: |
Potencial competitivo do melao brasileiro no mercado do Reino Unido. |
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Ano de publicação: |
2001 |
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Fonte/Imprenta: |
In: CONGRESSO BRASILEIRO DE ECONOMIA E SOCIOLOGIA RURAL, 39., 2001, Recife. Anais... Recife: SOBER/ESALQ/EMBRAPA/UFPE/URFPE, 2001. |
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Descrição Física: |
1 CD-ROM. |
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Idioma: |
Português |
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Conteúdo: |
O alto grau de competitividade que atualmente esta sendo vivenciado no mercado internacional de produtos hortifruticolas exige a realizacao de estudos que procurem identificar a real situacao de competitividade dos frutos brasileiros no referido mercado. Essa pesquisa teve como objetivo detenninar o potencial competitivo do melao brasileiro no do Reino Unido, que e o principal mercado importador do melao do Brasil. O metodo utilizado para a operacionalizacao dos dados e uma de matriz de tres entradas baseada nosparametros atrativo de mercado e posicao competitiva e a srie histrica abrangi da pelo estudo vai de 1993 a 1998. Os produtos envolvidos na analise sao os meloes procedentes do Brasil, Costa Rica e Espanha, pa¡ses que sao responsaveis por mais de 90% do melao importado anualmente pelo mercado do Reino Unido. Os resultados da pesquisa indicaram que embora o mercado de melao no Reino Unido esteja em franca expansao o produto brasileiro vive um processo de retrocesso, registrando perdas significativas de cotas de mercado. O estudo revelou que o produto brasileiro e o menos competitivo dos produtos analisados, atingindo no mercado do Reino Unido um mediano potencial competitivo enquanto Costa Rica e Espanha alcancaram um elevado potencial competitivo. |
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Palavras-Chave: |
Competitive; Competitividade; Exportation. |
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Thesagro: |
Cucumis Melo; Exportação; Melão; Mercado. |
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Thesaurus NAL: |
melons; trade. |
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Categoria do assunto: |
E Economia e Indústria Agrícola |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/CPATSA/8958/1/OPB206.pdf
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Marc: |
LEADER 02005nam a2200253 a 4500
001 1134331
005 2019-05-20
008 2001 bl uuuu u00u1 u #d
100 1 $aARAUJO, J. L. P.
245 $aPotencial competitivo do melao brasileiro no mercado do Reino Unido.
260 $aIn: CONGRESSO BRASILEIRO DE ECONOMIA E SOCIOLOGIA RURAL, 39., 2001, Recife. Anais... Recife: SOBER/ESALQ/EMBRAPA/UFPE/URFPE$c2001
300 $c1 CD-ROM.
520 $aO alto grau de competitividade que atualmente esta sendo vivenciado no mercado internacional de produtos hortifruticolas exige a realizacao de estudos que procurem identificar a real situacao de competitividade dos frutos brasileiros no referido mercado. Essa pesquisa teve como objetivo detenninar o potencial competitivo do melao brasileiro no do Reino Unido, que e o principal mercado importador do melao do Brasil. O metodo utilizado para a operacionalizacao dos dados e uma de matriz de tres entradas baseada nosparametros atrativo de mercado e posicao competitiva e a srie histrica abrangi da pelo estudo vai de 1993 a 1998. Os produtos envolvidos na analise sao os meloes procedentes do Brasil, Costa Rica e Espanha, pa¡ses que sao responsaveis por mais de 90% do melao importado anualmente pelo mercado do Reino Unido. Os resultados da pesquisa indicaram que embora o mercado de melao no Reino Unido esteja em franca expansao o produto brasileiro vive um processo de retrocesso, registrando perdas significativas de cotas de mercado. O estudo revelou que o produto brasileiro e o menos competitivo dos produtos analisados, atingindo no mercado do Reino Unido um mediano potencial competitivo enquanto Costa Rica e Espanha alcancaram um elevado potencial competitivo.
650 $amelons
650 $atrade
650 $aCucumis Melo
650 $aExportação
650 $aMelão
650 $aMercado
653 $aCompetitive
653 $aCompetitividade
653 $aExportation
700 1 $aGARCIA, J. L. L
700 1 $aCORREIA, R. C.
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