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Registro Completo |
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Biblioteca(s): |
Embrapa Gado de Leite. |
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Data corrente: |
18/02/2016 |
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Data da última atualização: |
03/02/2024 |
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Tipo da produção científica: |
Artigo em Periódico Indexado |
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Autoria: |
POLONINI, H. C.; BRANDAO, H. de M.; RAPOSO, N. R. B.; BRANDÃO, M. A. F.; MOUTON, L.; COUTÉ, A.; YÉPRÉMIAN, C.; SIVRY, Y.; BRAYNER, R. |
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Afiliação: |
Hudson C. Polonini, UFJF; HUMBERTO DE MELLO BRANDAO, CNPGL; Nadia R. B. Raposo, UFJF; Marcos Antonio F. Brandao, UFJF; Ludovic Mouton, Univesité Paris Diderot, France; Alain Coute, Muséum Nation d´Histoire Naturelle, France; Claude Yepremian, Muséum National d´Histoire Naturelle, France; Yann Sivry, Université Paris Diderot, France; Roberta Brayner, Université Paris Diderot, France. |
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Título: |
Size-dependent ecotoxicity of barium titanate particles: the case of Chlorella vulgaris green algae. |
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Ano de publicação: |
2015 |
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Fonte/Imprenta: |
Ecotoxicology, v. 24, p. 938-948, 2015. |
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Idioma: |
Inglês |
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Conteúdo: |
Studies have been demonstrating that smaller particles can lead to unexpected and diverse ecotoxicological effects when compared to those caused by the bulk material. In this study, the chemical composition, size and shape, state of dispersion, and surface's charge, area and physicochemistry of micro (BT MP) and nano barium titanate (BT NP) were determined. Green algae Chlorella vulgaris grown in Bold's Basal (BB) medium or Seine River water (SRW) was used as biological indicator to assess their aquatic toxicology. Responses such as growth inhibition, cell viability, superoxide dismutase (SOD) activity, adenosine-5-triphosphate (ATP) content and photosynthetic activity were evaluated. Tetragonal BT (~170 nm, 3.24 m(2) g(-1) surface area) and cubic BT (~60 nm, 16.60 m(2) g(-1)) particles were negative, poorly dispersed, and readily aggregated. BT has a statistically significant effect on C. vulgaris growth since the lower concentration tested (1 ppm), what seems to be mediated by induced oxidative stress caused by the particles (increased SOD activity and decreased photosynthetic efficiency and intracellular ATP content). The toxic effects were more pronounced when the algae was grown in SRW. Size does not seem to be an issue influencing the toxicity in BT particles toxicity since micro- and nano-particles produced significant effects on algae growth. |
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Palavras-Chave: |
Characterization; Seine river water. |
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Thesaurus Nal: |
barium titanate; ecotoxicology; nanotechnology. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/139385/1/Cnpgl-2015-Ecotoxicology-Size-dependent.pdf
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Marc: |
LEADER 02162naa a2200277 a 4500
001 2037622
005 2024-02-03
008 2015 bl uuuu u00u1 u #d
100 1 $aPOLONINI, H. C.
245 $aSize-dependent ecotoxicity of barium titanate particles$bthe case of Chlorella vulgaris green algae.$h[electronic resource]
260 $c2015
520 $aStudies have been demonstrating that smaller particles can lead to unexpected and diverse ecotoxicological effects when compared to those caused by the bulk material. In this study, the chemical composition, size and shape, state of dispersion, and surface's charge, area and physicochemistry of micro (BT MP) and nano barium titanate (BT NP) were determined. Green algae Chlorella vulgaris grown in Bold's Basal (BB) medium or Seine River water (SRW) was used as biological indicator to assess their aquatic toxicology. Responses such as growth inhibition, cell viability, superoxide dismutase (SOD) activity, adenosine-5-triphosphate (ATP) content and photosynthetic activity were evaluated. Tetragonal BT (~170 nm, 3.24 m(2) g(-1) surface area) and cubic BT (~60 nm, 16.60 m(2) g(-1)) particles were negative, poorly dispersed, and readily aggregated. BT has a statistically significant effect on C. vulgaris growth since the lower concentration tested (1 ppm), what seems to be mediated by induced oxidative stress caused by the particles (increased SOD activity and decreased photosynthetic efficiency and intracellular ATP content). The toxic effects were more pronounced when the algae was grown in SRW. Size does not seem to be an issue influencing the toxicity in BT particles toxicity since micro- and nano-particles produced significant effects on algae growth.
650 $abarium titanate
650 $aecotoxicology
650 $ananotechnology
653 $aCharacterization
653 $aSeine river water
700 1 $aBRANDAO, H. de M.
700 1 $aRAPOSO, N. R. B.
700 1 $aBRANDÃO, M. A. F.
700 1 $aMOUTON, L.
700 1 $aCOUTÉ, A.
700 1 $aYÉPRÉMIAN, C.
700 1 $aSIVRY, Y.
700 1 $aBRAYNER, R.
773 $tEcotoxicology$gv. 24, p. 938-948, 2015.
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Registro original: |
Embrapa Gado de Leite (CNPGL) |
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Registro Completo
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Biblioteca(s): |
Embrapa Instrumentação. |
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Data corrente: |
25/01/2008 |
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Data da última atualização: |
19/09/2013 |
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Tipo da produção científica: |
Resumo em Anais de Congresso |
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Autoria: |
LIBARONI, R.; SILVA, R.; LONGO, E.; CAMARGO, E. R.; RIBEIRO, C.; LEITE, E. R. |
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Título: |
Silanization kinetics in SiO2 nanoparticles using tertiary amines as catalysts |
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Ano de publicação: |
2007 |
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Fonte/Imprenta: |
In: ENCONTRO DA SOCIEDADE BRASILEIRA DE PESQUISA EM MATERIAIS - SbpMat, 6., 2007, Natal; BRAZILIAN MRS MEETING, 6., 2007, Natal. Abstracts... Natal: SBMat, 2007. 1 CD-ROM. Não paginado. |
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Idioma: |
Inglês |
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Palavras-Chave: |
Evento. |
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Categoria do assunto: |
-- |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/item/89760/1/Proci-07.00204.pdf
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Marc: |
LEADER 00618nam a2200169 a 4500
001 1031252
005 2013-09-19
008 2007 bl uuuu u00u1 u #d
100 1 $aLIBARONI, R.
245 $aSilanization kinetics in SiO2 nanoparticles using tertiary amines as catalysts
260 $aIn: ENCONTRO DA SOCIEDADE BRASILEIRA DE PESQUISA EM MATERIAIS - SbpMat, 6., 2007, Natal; BRAZILIAN MRS MEETING, 6., 2007, Natal. Abstracts... Natal: SBMat, 2007. 1 CD-ROM. Não paginado.$c2007
653 $aEvento
700 1 $aSILVA, R.
700 1 $aLONGO, E.
700 1 $aCAMARGO, E. R.
700 1 $aRIBEIRO, C.
700 1 $aLEITE, E. R.
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Embrapa Instrumentação (CNPDIA) |
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