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| Registros recuperados : 678 | |
| 402. |  | SANTOS, L. D. dos; LAMEIRA, O. A.; MEDEIROS, A. P. R.; ABREU, L. F.; OLIVEIRA, E. C. P. de. Influência do local de origem e do tempo de descanso da semente durante o período chuvoso, no rendimento e qualidade do óleo de Carapa guianensis Aublt. no estado do Pará. Enciclopédia Biosfera, v. 13, n. 23, p. 671-680, 2016.| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 403. | | MEDEIROS, A. P. R.; ROCHA, T. T.; LAMEIRA, O. A.; NEVES, R. L. P.; CORREIA, R. G. C. Influência do período e do ambiente de armazenamento de sementes de andiroba (Carapa guianensis Aubl. - Meliaceae) na produção de mudas. Cadernos de Agroecologia, v. 10, n. 3, out. 2015. Edição dos Resumos do IX Congresso Brasileiro de Agroecologia e IV Seminário Estadual de Agroecologia, Belém, PA, set./out. 2015.| Biblioteca(s): Embrapa Amazônia Oriental. |
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| 405. | | MEDEIROS, A. A. de; AMORIM, J. R. A. de; SILVA, D. J.; DANTAS, J. A.; GUERRA, A. G. Mineral composition of leaves and fruits of irrigated mango trees in Rio Grande do Norte State, Brazil. In; INTERNATIONAL MANGO SYMPOSIUM, 7., 2002, Recife. Program and abstracts... Fortaleza: Embrapa Agroindústria Tropical; Planaltina: Embrapa Cerrados; Cruz das Almas: Embrapa Mandioca e Fruticultura; Teresina: Embrapa Meio-Norte; Petrolina: Embrapa Semi-Árido; Recife: IPA, 2002. p. 231. (Embrapa Agroindústria Tropical. Documentos; 46)| Biblioteca(s): Embrapa Semiárido. |
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| 407. | | SARTORI, C. A.; PESSOA, M. C. P. Y.; SA, L. A. N. de; MEDEIROS, A. G. B.; WILCKEN, C. F. Monitoramento do psilídeo-de-concha, do percevejo bronzeado e do bioagente Psyllaephagus bliteus em hortos de Eucalyptus sp. em Minas Gerais em 2014. In: CONGRESSO INTERINSTITUCIONAL DE INICIAÇÃO CIENTÍFICA, 9., 2015, Campinas. Anais... Campinas: IAC), 2015. 8 p.| Biblioteca(s): Embrapa Meio Ambiente. |
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| 409. | | COSTA, R. G.; MEDEIROS, A. N. de; MADRUGA, M. S.; CRUZ, S. E. S. B. S.; MELO, L. S. de. Qualidade da carcaça de caprinos Saanen alimentados com diferentes níveis de volumoso: concentrado. In: SIMPÓSIO INTERNACIONAL SOBRE CAPRINOS E OVINOS DE CORTE, 2.; SIMPÓSIO INTERNACIONAL SOBRE AGRONEGÓCIO DA CAPRINOCULTURA LEITEIRA, 1., 2003, João Pessoa. [Resumos]. João Pessoa: EMEPA-PB, 2003. p. 671.| Biblioteca(s): Embrapa Caprinos e Ovinos. |
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| 410. | | MIRESKI, M. C.; GUEDES, R. S.; WENDLING, I.; PEÑA PEÑA, M. L.; MEDEIROS, A. C. de S. Secagem na viabilidade e desenvolvimento embrionário de sementes de Ilex paraguariensis. Ciência Florestal, Santa Maria, v. 29, n. 3, p. 1354-1362, jul./set. 2019.| Biblioteca(s): Embrapa Florestas. |
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| 411. | | BARBIERI, R. L.; HEIDEN, G.; CASTRO, C. M.; DORNELLES, J. E. F.; SINIGAGLIA, C.; MEDEIROS, A. R. M. de. Resgate e conservação de variedades crioulas de cucurbitáceas do Sul do Brasil. CONGRESSO BRASILEIRO DE AGROECOLOGIA, 2.; SEMINÁRIO INTERNACIONAL SOBRE AGROECOLOGIA, 5.; SEMINÁRIO ESTADUAL SOBRE AGROECOLOGIA, 6., 2004, Porto Alegre. Agrobiodiversidade: base para sociedades sustentáveis: anais... Porto Alegre: EMATER - RS, 2004. 1 CD-ROM| Biblioteca(s): Embrapa Clima Temperado; Embrapa Hortaliças. |
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| 413. | | MEDEIROS, A. C. de S.; CICERO, S. M.; SOUZA, P. I. de M. de; RODRIGUEZ CASTRO, L. H. Teores de macronutrientes contidos nas sementes de trigo e a sua qualidade fisiologica. In: CONGRESSO BRASILEIRO DE SEMENTES, 4., 1985, Brasilia, DF. Resumo dos trabalhos tecnicos, Brasilia: ABRATES, 1985. p.64.| Biblioteca(s): Embrapa Cerrados. |
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| 420. | | MOREIRA, M. A. B.; GUERRA, A. G.; MATA, S. S. da; PINHEIRO, E. B.; RONEY, R.; MEDEIROS, A. C. Susceptibildade da variedade de banana Gran Naine a infestação do moleque da bananeira. In: CONGRESSO BRASILEIRO DE FRUTICULTURA, 21., 2010, Natal. Anais... Natal: SBF, 2010. Artigo em anais.| Biblioteca(s): Embrapa Tabuleiros Costeiros. |
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| Registros recuperados : 678 | |
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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
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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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