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 | Acesso ao texto completo restrito à biblioteca da Embrapa Gado de Leite. Para informações adicionais entre em contato com cnpgl.biblioteca@embrapa.br. |
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Registro Completo |
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Biblioteca(s): |
Embrapa Gado de Leite. |
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Data corrente: |
02/04/2015 |
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Data da última atualização: |
05/02/2024 |
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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.; MOUTON, L.; YÉPRÉMIAN, C.; COUTÉ, A.; BRAYNER, R. |
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Afiliação: |
HUDSON C. POLONINI, UFJF; HUMBERTO DE MELLO BRANDAO, CNPGL; NÁDIA R. B. RAPOSO, UFJF; LUDOVIC MOUTON, Université Paris Diderot, Paris; CLAUDE YÉPRÉMIAN, Muséum National d'Histoire Naturelle, Paris; ALAIN COUTÉ, Muséum National d'Histoire Naturelle, Paris; ROBERTA BRAYNER, Université Paris Diderot, Paris. |
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Título: |
Ecotoxicological studies of micro- and nanosized barium titanate on aquatic photosynthetic microorganisms. |
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Ano de publicação: |
2014 |
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Fonte/Imprenta: |
Aquatic Toxicology, v. 154, p. 58-70, 2014. |
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DOI: |
https://doi.org/10.1016/j.aquatox.2014.05.005 |
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Idioma: |
Inglês |
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Conteúdo: |
The interaction between live organisms and micro- or nanosized materials has become a current focus in toxicology. As nanosized barium titanate has gained momentum lately in the medical field, the aims of the present work are: (i) to assess BT toxicity and its mechanisms on the aquatic environment, using two photosynthetic organisms (Anabaena flos-aquae, a colonial cyanobacteria, and Euglena gracilis, a flagellated euglenoid); (ii) to study and correlate the physicochemical properties of BT with its toxic profile; (iii) to compare the BT behavior (and Ba2+ released ions) and the toxic profile in synthetic (Bold's Basal, BB, or Mineral Medium, MM) and natural culture media (Seine River Water, SRW); and (iv) to address whether size (micro, BT MP, or nano, BT NP) is an issue in BT particles toxicity. Responses such as growth inhibition, cell viability, superoxide dismutase (SOD) activity, adenosine-5-triphosphate (ATP) content and photosynthetic efficiency were evaluated. The main conclusions are: (i) BT have statistically significant toxic effects on E. gracilis growth and viability even in small concentrations (1 μg mL−1), for both media and since the first 24 h; on the contrary of on A. flos-aquae, to whom the effects were noticeable only for the higher concentrations (after 96 h: ≥75 μg mL−1 for BT NP and =100 μg mL−1 for BT MP, in BB; and ≥75 μg mL−1 for both materials in SRW), in spite of the viability being affected in all concentrations; (ii) the BT behaviors in synthetic and natural culture media were slightly different, being the toxic effects more pronounced when grown in SRW – in this case, a worse physiological state of the organisms in SRW can occur and account for the lower resistance, probably linked to a paucity of nutrients or even a synergistic effect with a contaminant from the river; and (iii) the effects seem to be mediated by induced stress without a direct contact in A. flos-aquae and by direct endocytosis in E. gracilis, but in both organisms the contact with both BT MP and BT NP increased SOD activity and decreased photosynthetic efficiency and intracellular ATP content; and (iv) size does not seem to be an issue in BT particles toxicity since micro- and nano-particles produced significant toxic for the model-organisms. MenosThe interaction between live organisms and micro- or nanosized materials has become a current focus in toxicology. As nanosized barium titanate has gained momentum lately in the medical field, the aims of the present work are: (i) to assess BT toxicity and its mechanisms on the aquatic environment, using two photosynthetic organisms (Anabaena flos-aquae, a colonial cyanobacteria, and Euglena gracilis, a flagellated euglenoid); (ii) to study and correlate the physicochemical properties of BT with its toxic profile; (iii) to compare the BT behavior (and Ba2+ released ions) and the toxic profile in synthetic (Bold's Basal, BB, or Mineral Medium, MM) and natural culture media (Seine River Water, SRW); and (iv) to address whether size (micro, BT MP, or nano, BT NP) is an issue in BT particles toxicity. Responses such as growth inhibition, cell viability, superoxide dismutase (SOD) activity, adenosine-5-triphosphate (ATP) content and photosynthetic efficiency were evaluated. The main conclusions are: (i) BT have statistically significant toxic effects on E. gracilis growth and viability even in small concentrations (1 μg mL−1), for both media and since the first 24 h; on the contrary of on A. flos-aquae, to whom the effects were noticeable only for the higher concentrations (after 96 h: ≥75 μg mL−1 for BT NP and =100 μg mL−1 for BT MP, in BB; and ≥75 μg mL−1 for both materials in SRW), in spite of the viability being affected in all concentrations; (ii) the BT behaviors in synthet... Mostrar Tudo |
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Thesaurus Nal: |
barium titanate; ecotoxicology; nanoparticles. |
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Categoria do assunto: |
X Pesquisa, Tecnologia e Engenharia |
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Marc: |
LEADER 03038naa a2200241 a 4500
001 2012701
005 2024-02-05
008 2014 bl uuuu u00u1 u #d
024 7 $ahttps://doi.org/10.1016/j.aquatox.2014.05.005$2DOI
100 1 $aPOLONINI, H. C.
245 $aEcotoxicological studies of micro- and nanosized barium titanate on aquatic photosynthetic microorganisms.$h[electronic resource]
260 $c2014
520 $aThe interaction between live organisms and micro- or nanosized materials has become a current focus in toxicology. As nanosized barium titanate has gained momentum lately in the medical field, the aims of the present work are: (i) to assess BT toxicity and its mechanisms on the aquatic environment, using two photosynthetic organisms (Anabaena flos-aquae, a colonial cyanobacteria, and Euglena gracilis, a flagellated euglenoid); (ii) to study and correlate the physicochemical properties of BT with its toxic profile; (iii) to compare the BT behavior (and Ba2+ released ions) and the toxic profile in synthetic (Bold's Basal, BB, or Mineral Medium, MM) and natural culture media (Seine River Water, SRW); and (iv) to address whether size (micro, BT MP, or nano, BT NP) is an issue in BT particles toxicity. Responses such as growth inhibition, cell viability, superoxide dismutase (SOD) activity, adenosine-5-triphosphate (ATP) content and photosynthetic efficiency were evaluated. The main conclusions are: (i) BT have statistically significant toxic effects on E. gracilis growth and viability even in small concentrations (1 μg mL−1), for both media and since the first 24 h; on the contrary of on A. flos-aquae, to whom the effects were noticeable only for the higher concentrations (after 96 h: ≥75 μg mL−1 for BT NP and =100 μg mL−1 for BT MP, in BB; and ≥75 μg mL−1 for both materials in SRW), in spite of the viability being affected in all concentrations; (ii) the BT behaviors in synthetic and natural culture media were slightly different, being the toxic effects more pronounced when grown in SRW – in this case, a worse physiological state of the organisms in SRW can occur and account for the lower resistance, probably linked to a paucity of nutrients or even a synergistic effect with a contaminant from the river; and (iii) the effects seem to be mediated by induced stress without a direct contact in A. flos-aquae and by direct endocytosis in E. gracilis, but in both organisms the contact with both BT MP and BT NP increased SOD activity and decreased photosynthetic efficiency and intracellular ATP content; and (iv) size does not seem to be an issue in BT particles toxicity since micro- and nano-particles produced significant toxic for the model-organisms.
650 $abarium titanate
650 $aecotoxicology
650 $ananoparticles
700 1 $aBRANDAO, H. de M.
700 1 $aRAPOSO, N. R. B.
700 1 $aMOUTON, L.
700 1 $aYÉPRÉMIAN, C.
700 1 $aCOUTÉ, A.
700 1 $aBRAYNER, R.
773 $tAquatic Toxicology$gv. 154, p. 58-70, 2014.
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Embrapa Gado de Leite (CNPGL) |
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Registro Completo
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Biblioteca(s): |
Embrapa Semiárido. |
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Data corrente: |
25/09/2014 |
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Data da última atualização: |
25/09/2014 |
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Tipo da produção científica: |
Artigo em Anais de Congresso |
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Autoria: |
SIMOES, W. L.; YURI, J. E.; GUIMARÃES, M. J. M; SANTOS, J. E. dos; LIMA, J. A.; SILVA, J. M. da; NASCIMENTO, T. L. do. |
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Afiliação: |
WELSON LIMA SIMOES, CPATSA; JONY EISHI YURI, CPATSA; M. J. M. GUIMARÃES, Mestrando da UFRPE; J. E. DOS SANTOS; J. A. LIMA; J. M. da SILVA; T. L. DO NASCIMENTO. |
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Título: |
Produtividade de alface americana em diferentes sistemas de irrigação e cobertura agrotêxtil. |
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Ano de publicação: |
2014 |
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Fonte/Imprenta: |
In: CONGRESSO NACIONAL DE IRRIGAÇÃO E DRENAGEM, 24, 2014, Brasília, DF. Reservação e alocação da água para a agricultura irrigada. Brasília, DF: ABID, 2014. |
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Descrição Física: |
1 CD-ROM. |
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Idioma: |
Português |
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Conteúdo: |
Realizou-se o presente trabalho com o objetivo de avaliar a produtividade de alface americana submetida a diferentes sistemas de irrigação localizada, com e sem a cobertura agrotêxtil. O experimento foi implantado no Campo Experimental de Bebedouro, pertencente à Embrapa Semiárido, em Petrolina - PE. O delineamento experimental utilizado foi de blocos casualizados, em parcelas subdivididas, com quatro repetições. Os tratamentos constituíram da combinação do tipo de irrigação (gotejamento e microaspersão) e do uso ou não de cobertura agrotéxtil, sendo utilizada a cultivar Tainá. Não se observou efeitos significativos para a largura e o comprimento das folhas. A maior produtividade foi obtida quando cultivada com irrigação por microaspersão sem cobertura agrotêxtil. |
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Palavras-Chave: |
Alface americana. |
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Thesagro: |
Irrigação; Irrigação Localizada; Lactuca Sativa. |
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Thesaurus NAL: |
Irrigation; Lettuce. |
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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/item/109055/1/Welson-2014.pdf
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Marc: |
LEADER 01661nam a2200265 a 4500
001 1995882
005 2014-09-25
008 2014 bl uuuu u00u1 u #d
100 1 $aSIMOES, W. L.
245 $aProdutividade de alface americana em diferentes sistemas de irrigação e cobertura agrotêxtil.
260 $aIn: CONGRESSO NACIONAL DE IRRIGAÇÃO E DRENAGEM, 24, 2014, Brasília, DF. Reservação e alocação da água para a agricultura irrigada. Brasília, DF: ABID$c2014
300 $c1 CD-ROM.
520 $aRealizou-se o presente trabalho com o objetivo de avaliar a produtividade de alface americana submetida a diferentes sistemas de irrigação localizada, com e sem a cobertura agrotêxtil. O experimento foi implantado no Campo Experimental de Bebedouro, pertencente à Embrapa Semiárido, em Petrolina - PE. O delineamento experimental utilizado foi de blocos casualizados, em parcelas subdivididas, com quatro repetições. Os tratamentos constituíram da combinação do tipo de irrigação (gotejamento e microaspersão) e do uso ou não de cobertura agrotéxtil, sendo utilizada a cultivar Tainá. Não se observou efeitos significativos para a largura e o comprimento das folhas. A maior produtividade foi obtida quando cultivada com irrigação por microaspersão sem cobertura agrotêxtil.
650 $aIrrigation
650 $aLettuce
650 $aIrrigação
650 $aIrrigação Localizada
650 $aLactuca Sativa
653 $aAlface americana
700 1 $aYURI, J. E.
700 1 $aGUIMARÃES, M. J. M
700 1 $aSANTOS, J. E. dos
700 1 $aLIMA, J. A.
700 1 $aSILVA, J. M. da
700 1 $aNASCIMENTO, T. L. do
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