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Registro Completo |
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Biblioteca(s): |
Embrapa Recursos Genéticos e Biotecnologia. |
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Data corrente: |
31/12/1999 |
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Data da última atualização: |
22/07/2016 |
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Autoria: |
SINGER, R. |
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Título: |
A monograph of Favolaschia |
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Ano de publicação: |
1974 |
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Fonte/Imprenta: |
Lehre: Verlag von J. Cramer, 1974. |
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Volume: |
v.50 |
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Páginas: |
108p. |
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Descrição Física: |
il. |
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Série: |
(Nova Hedwigia, 50) |
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Idioma: |
Inglês |
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Thesagro: |
Taxonomia. |
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Thesaurus Nal: |
Favolaschia; taxonomy. |
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Categoria do assunto: |
-- |
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Marc: |
LEADER 00395nam a2200157 a 4500
001 1177095
005 2016-07-22
008 1974 bl uuuu de 00u1 u #d
100 1 $aSINGER, R.
245 $aA monograph of Favolaschia
260 $aLehre: Verlag von J. Cramer$c1974
300 $a108p. v.50$cil.
490 $a(Nova Hedwigia, 50)$vv.50
650 $aFavolaschia
650 $ataxonomy
650 $aTaxonomia
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Registro original: |
Embrapa Recursos Genéticos e Biotecnologia (CENARGEN) |
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Classificação |
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Registro |
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Registro Completo
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Biblioteca(s): |
Embrapa Meio Ambiente. |
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Data corrente: |
25/10/2017 |
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Data da última atualização: |
25/10/2017 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
SILVA, G. H. da; CLEMENTE, Z.; COA, F.; RODRIGUES NETO, L. L.; KHAN, L. U.; CARVALHO, H. W. P.; CASTRO, V. L. S. S. de; MARTINEZ, D. S. T.; MONTEIRO, R. T. R. |
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Afiliação: |
G. H. da SILVA; Z. CLEMENTE; F. COA; L. L. RODRIGUES NETO; L. U. KHAN; H. W. P. CARVALHO; VERA LUCIA SCHERHOLZ S DE CASTRO, CNPMA; D. S. T. MARTINEZ; R. T. R. MONTEIRO. |
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Título: |
Nanoecotoxicity and uptake of TiO2@MWCNT hybrid material on Danio rerio embryos. |
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Ano de publicação: |
2017 |
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Fonte/Imprenta: |
In: BRAZILIAN MRS MEETING, 16., 2017, Gramado. Proceedings... Gramado: Sociedade Brasileira de Pesquisa em Materiais, 2017. Ref. Q.OR3.11. p. 384. |
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Idioma: |
Inglês |
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Conteúdo: |
A process that is being widely used for environmental remediation is photocatalysis. The use of nanotechnology can highly improve this field, and there is already a wide range of nanomaterials employed in photocatalytic research and applications. A material that has been highlighted in this field is the TiO2@MWCNT, this combination increase the photocatalytic efficiency, and therefore being an extremely effective method for remediation of contaminants. Due to the importance of these hybrid materials, the production of such particles has been encouraged. However, concerns about their toxicity and safety when released into the environment should be considered. Therefore, to understand the role of TiO2@MWCNT in the environment, our main objective was to study the photocatalytic activity and toxicity of TiO2@MWCNT composite on Danio rerio embryos (zebrafish). For this purpose, TiO2@MWCNT nanomaterial was synthetized, by mechanical mixing method, and an early life stage assay was performed with zebrafish embryos. The parameters assessed were acute toxicity, hatching rate, growth, yolk sac size, and the sarcomere length. In addition, we employed ?-probe X-ray fluorescence spectroscopy to observe if nanoparticles were being uptake by zebrafish larvae. Also, the photocatalytic efficiency of the TiO2@MWCNT was assessed through indigo blue dye degradation using UV-Vis spectroscopy. TiO2@MWCNT characterization was performed by SEM, TEM and TGA analysis. Our results shown that the preparation method was efficient to loaded the TiO2 on the surface of MWCNT, and the composite was more photocatalytic than TiO2. Besides, no acute toxicity, nor sublethal effects in Danio rerio embryos was observed until 100 mg L-1. Nevertheless, µ-XRF showed that the larvae were ingesting the nanoparticle. In conclusion, TiO2@MWCNT is a promising material for environmental remediation, presenting high efficiency and low toxicity. MenosA process that is being widely used for environmental remediation is photocatalysis. The use of nanotechnology can highly improve this field, and there is already a wide range of nanomaterials employed in photocatalytic research and applications. A material that has been highlighted in this field is the TiO2@MWCNT, this combination increase the photocatalytic efficiency, and therefore being an extremely effective method for remediation of contaminants. Due to the importance of these hybrid materials, the production of such particles has been encouraged. However, concerns about their toxicity and safety when released into the environment should be considered. Therefore, to understand the role of TiO2@MWCNT in the environment, our main objective was to study the photocatalytic activity and toxicity of TiO2@MWCNT composite on Danio rerio embryos (zebrafish). For this purpose, TiO2@MWCNT nanomaterial was synthetized, by mechanical mixing method, and an early life stage assay was performed with zebrafish embryos. The parameters assessed were acute toxicity, hatching rate, growth, yolk sac size, and the sarcomere length. In addition, we employed ?-probe X-ray fluorescence spectroscopy to observe if nanoparticles were being uptake by zebrafish larvae. Also, the photocatalytic efficiency of the TiO2@MWCNT was assessed through indigo blue dye degradation using UV-Vis spectroscopy. TiO2@MWCNT characterization was performed by SEM, TEM and TGA analysis. Our results shown that the prepa... Mostrar Tudo |
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Palavras-Chave: |
Nanoecotoxicologia. |
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Thesaurus NAL: |
Danio rerio. |
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Categoria do assunto: |
W Química e Física |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/165540/1/RA-CastroVLSS-16BrazilMRSMeeting-2017-p384.pdf
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Marc: |
LEADER 02716nam a2200229 a 4500
001 2078103
005 2017-10-25
008 2017 bl uuuu u00u1 u #d
100 1 $aSILVA, G. H. da
245 $aNanoecotoxicity and uptake of TiO2@MWCNT hybrid material on Danio rerio embryos.$h[electronic resource]
260 $aIn: BRAZILIAN MRS MEETING, 16., 2017, Gramado. Proceedings... Gramado: Sociedade Brasileira de Pesquisa em Materiais, 2017. Ref. Q.OR3.11. p. 384.$c2017
520 $aA process that is being widely used for environmental remediation is photocatalysis. The use of nanotechnology can highly improve this field, and there is already a wide range of nanomaterials employed in photocatalytic research and applications. A material that has been highlighted in this field is the TiO2@MWCNT, this combination increase the photocatalytic efficiency, and therefore being an extremely effective method for remediation of contaminants. Due to the importance of these hybrid materials, the production of such particles has been encouraged. However, concerns about their toxicity and safety when released into the environment should be considered. Therefore, to understand the role of TiO2@MWCNT in the environment, our main objective was to study the photocatalytic activity and toxicity of TiO2@MWCNT composite on Danio rerio embryos (zebrafish). For this purpose, TiO2@MWCNT nanomaterial was synthetized, by mechanical mixing method, and an early life stage assay was performed with zebrafish embryos. The parameters assessed were acute toxicity, hatching rate, growth, yolk sac size, and the sarcomere length. In addition, we employed ?-probe X-ray fluorescence spectroscopy to observe if nanoparticles were being uptake by zebrafish larvae. Also, the photocatalytic efficiency of the TiO2@MWCNT was assessed through indigo blue dye degradation using UV-Vis spectroscopy. TiO2@MWCNT characterization was performed by SEM, TEM and TGA analysis. Our results shown that the preparation method was efficient to loaded the TiO2 on the surface of MWCNT, and the composite was more photocatalytic than TiO2. Besides, no acute toxicity, nor sublethal effects in Danio rerio embryos was observed until 100 mg L-1. Nevertheless, µ-XRF showed that the larvae were ingesting the nanoparticle. In conclusion, TiO2@MWCNT is a promising material for environmental remediation, presenting high efficiency and low toxicity.
650 $aDanio rerio
653 $aNanoecotoxicologia
700 1 $aCLEMENTE, Z.
700 1 $aCOA, F.
700 1 $aRODRIGUES NETO, L. L.
700 1 $aKHAN, L. U.
700 1 $aCARVALHO, H. W. P.
700 1 $aCASTRO, V. L. S. S. de
700 1 $aMARTINEZ, D. S. T.
700 1 $aMONTEIRO, R. T. R.
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Registro original: |
Embrapa Meio Ambiente (CNPMA) |
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ID |
Origem |
Tipo/Formato |
Classificação |
Cutter |
Registro |
Volume |
Status |
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Registro completo
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Biblioteca(s): |
Catálogo Coletivo de Periódicos Embrapa; Embrapa Recursos Genéticos e Biotecnologia. |
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Identificador: |
95 |
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Data corrente: |
09/05/2002 |
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Data da última atualização: |
30/04/2015 |
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Código do título: |
2500014 |
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ISSN: |
1217-8950 |
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Código CCN: |
091477-0 |
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Título e Subtítulo: |
ACTA MICROBIOLOGICA ET IMMUNOLOGICA HUNGARICAE |
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Título anterior: |
ACTA MICROBIOLOGICA ACADEMIAE SCIENTIARUM HUNGARICAE = MAGYAR TUDOMANYOS AKADEMIA MIKROBIOLOGIAI KOZLEMENYEI |
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Entidade: |
Akademiai Kiado |
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Local de publicação: |
Budapest, HU |
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Periodicidade: |
Trimestral |
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Bases onde o periódico é indexado: |
INDEX MEDICUS |
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Inicio de publicação: |
1994 |
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Coleções da unidade: |
Embrapa Recursos Genéticos e Biotecnologia
1994 41(1-4) supl; 1995-98 42-45
Classificação: 576.05 |
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