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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 Roraima. |
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Data corrente: |
21/02/1994 |
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Data da última atualização: |
30/05/2022 |
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Autoria: |
GIANLUPPI, V.; CAMARGO, A. H. A. |
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Afiliação: |
EMBRAPA-UEPAT de Boa Vista. |
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Título: |
Sistema de produção sequencial de arroz com forrageiras, em solos de cerrado de Roraima. III. Andropogon + estilosantes e quicuio da amazonia + desmodio. |
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Ano de publicação: |
1983 |
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Fonte/Imprenta: |
Boa Vista, RR: EMBRAPA-UEPAT de Boa Vista, 1983. |
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Páginas: |
6 p. |
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Série: |
(EMBRAPA-UEPAT de Boa Vista. Pesquisa em Andamento, 9). |
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Idioma: |
Português |
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Conteúdo: |
Este trabalho objetiva testar alternativas do estabelecimento em consorciação, de quicuio da amazônia (Brachiaria humidicola) + desmodio (Desmodium ovalifolium) e andropogon (Andropogon gayanus) + estilosantes (Stylosanthes capitata) com arroz de sequeiro, beneficiando-se estas forrageiras da adubação residual e de preparo do solo necessários ao cereal. |
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Palavras-Chave: |
Consórcio; Forrageira; Quicuio; Roraima; Savana; Sequeiro; Sistema; Solos. |
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Thesagro: |
Andropogon Gayanus; Arroz; Brachiaria Humidicola; Capim Andropogon; Capim Quicuio; Cerrado; Cultivo Continuo; Desmódio; Desmodium Ovalifolium; Estilosante; Oryza Sativa; Produção. |
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Thesaurus NAL: |
Andropogon; forage; rice; Stylosanthes capitata. |
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Categoria do assunto: |
--
F Plantas e Produtos de Origem Vegetal |
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URL: |
https://ainfo.cnptia.embrapa.br/digital/bitstream/doc/687449/1/N-09-JUN83.pdf
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Marc: |
LEADER 01561nam a2200433 a 4500
001 1687449
005 2022-05-30
008 1983 bl uuuu u0uu1 u #d
100 1 $aGIANLUPPI, V.
245 $aSistema de produção sequencial de arroz com forrageiras, em solos de cerrado de Roraima. III. Andropogon + estilosantes e quicuio da amazonia + desmodio.
260 $aBoa Vista, RR: EMBRAPA-UEPAT de Boa Vista$c1983
300 $a6 p.
490 $a(EMBRAPA-UEPAT de Boa Vista. Pesquisa em Andamento, 9).
520 $aEste trabalho objetiva testar alternativas do estabelecimento em consorciação, de quicuio da amazônia (Brachiaria humidicola) + desmodio (Desmodium ovalifolium) e andropogon (Andropogon gayanus) + estilosantes (Stylosanthes capitata) com arroz de sequeiro, beneficiando-se estas forrageiras da adubação residual e de preparo do solo necessários ao cereal.
650 $aAndropogon
650 $aforage
650 $arice
650 $aStylosanthes capitata
650 $aAndropogon Gayanus
650 $aArroz
650 $aBrachiaria Humidicola
650 $aCapim Andropogon
650 $aCapim Quicuio
650 $aCerrado
650 $aCultivo Continuo
650 $aDesmódio
650 $aDesmodium Ovalifolium
650 $aEstilosante
650 $aOryza Sativa
650 $aProdução
653 $aConsórcio
653 $aForrageira
653 $aQuicuio
653 $aRoraima
653 $aSavana
653 $aSequeiro
653 $aSistema
653 $aSolos
700 1 $aCAMARGO, A. H. A.
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Embrapa Roraima (CPAF-RR) |
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