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85. | | MOURA, M. A. M.; DOMINGUES, I.; OLIVEIRA, R.; JONSSON, C. M.; NOGUEIRA, A. J. A. Efeitos subletais da ametrina em paulistinha (Danio rerio). O Biológico, São Paulo, SP, v. 73, n. 2, p. 154, jul./dez. 2011. Edição dos resumos da 24ª Reunião Anual do Instituto Biológico, São Paulo, nov. 2011. Resumo 051. Biblioteca(s): Embrapa Meio Ambiente. |
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87. | | DANTZGER, M. D.; DANTZGER, D. D.; PRESTES, E. B.; JONSSON, C. M.; AOYAMA, H. Estudos de toxicidade de agroquímicos na atividade da fosfatase ácida de Daphnia similis. In: WORKSHOP DE ECOTOXICOLOGIA,, 3., 2008, Rio Claro. Resumos expandidos... Holos Environment, Rio Claro, v.8, n.2, supl., 2008. 4p. Biblioteca(s): Embrapa Meio Ambiente. |
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88. | | MOURA, A. M.; DOMINGUES, I.; OLIVEIRA, R.; JONSSON, C. M.; NOGUEIRA, A. J. A. Assessing mixture toxicity of herbicides using zebrafish (Danio rerio) early-life stages. In: WORKSHOP DE ECOTOXICOLOGIA, 4.; SIMPÓSIO DE ECOTOXICOLOGIA, 1., 2011, Rio Claro. Resumos... Rio Claro: UNESP - Instituto de Biociências, 2011. p. 6. Biblioteca(s): Embrapa Meio Ambiente. |
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89. | | JONSSON, C. M.; MAIA, A. de H. N.; CAPALBO, D. M. F.; CARBALLO HONDAL, O. Efecto del bioplaguicida Bacillus thuringiensis (Berliner, 1911), cepa 344, en organismos indicadores del compartimiento acuático. Revista de Toxicología en Línea, Rosario, v. 36, p. 40-63, 2011. Biblioteca(s): Embrapa Meio Ambiente. |
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99. | | CLEMENTE, Z.; CASTRO, V. L. S. S. de; JONSSON, C. M.; FRACETO, L. F. Exposição subletal de Daphnia a anatase provoca alterações bioquímicas dependentes da condição de iluminação. In: WORKSHOP DA REDE DE NANOTECNOLOGIA APLICADA AO AGRONEGÓCIO, 8., 2014, Juiz de Fora. Anais... São Carlos, SP: Embrapa Instrumentação; Campo Grande, MS: Embrapa Gado de Corte; Juiz de Fora: Embrapa Gado de Leite, 2014. p. 558-562. Biblioteca(s): Embrapa Meio Ambiente. |
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Registro Completo
Biblioteca(s): |
Embrapa Meio Ambiente. |
Data corrente: |
22/12/2014 |
Data da última atualização: |
23/12/2014 |
Tipo da produção científica: |
Artigo em Periódico Indexado |
Circulação/Nível: |
A - 1 |
Autoria: |
CLEMENTE, Z.; CASTRO, V. L. S. S. de; JONSSON, C. M.; FRACETO, L. F. |
Afiliação: |
ZAIRA CLEMENTE, IB-UNICAMP; VERA LUCIA SCHERHOLZ S DE CASTRO, CNPMA; CLAUDIO MARTIN JONSSON, CNPMA; LEONARDO FERNANDES FRACETO, UNESP. |
Título: |
Minimal levels of ultraviolet light enhance the toxicity of TiO2 nanoparticles to two representative organisms of aquatic systems. |
Ano de publicação: |
2014 |
Fonte/Imprenta: |
Journal of Nanoparticle Research, Dordrecht, v. 16, n. 8, article 2259, 2014. |
Idioma: |
Inglês |
Conteúdo: |
Abstract: A number of studies have been published concerning the potential ecotoxicological risks of titanium dioxide nanoparticles (nano-TiO2), but the results still remain inconclusive. The characteristics of the diverse types of nano-TiO2 must be considered in order to establish experimental models to study their toxicity. TiO2 has important photocatalytic properties, and its photoactivation occurs in the ultraviolet (UV) range. The aim of this study was to investigate the toxicity of nano-TiO2 to indicators organisms of freshwater and saline aquatic systems, under different illumination conditions (visible light, with or without UV light). Daphnia similis and Artemia salina were co-exposed to a sublethal dose of UV light and different concentrations of nano-TiO2 in the form of anatase (TA) or an anatase/rutile mixture (TM). Both products were considered practically non-toxic under visible light to D. similis and A. salina (EC50(48h) > 100 mg/L). Exposure to nano-TiO2 under visible and UV light enhanced the toxicity of both products. In the case of D. similis, TM was more toxic than TA, showing values of EC50(48h) = 60.16 and 750.55 mg/L, respectively. A. salina was more sensitive than D. similis, with EC50(48h) = 4 mg/L for both products. Measurements were made of the growth rates of exposed organisms, together with biomarkers of oxidative stress and metabolism. The results showed that the effects of nano-TiO2 depended on the organism, exposure time, crystal phase, and illumination conditions, and emphasized the need for a full characterization of nanoparticles and their behavior when studying nanotoxicity. MenosAbstract: A number of studies have been published concerning the potential ecotoxicological risks of titanium dioxide nanoparticles (nano-TiO2), but the results still remain inconclusive. The characteristics of the diverse types of nano-TiO2 must be considered in order to establish experimental models to study their toxicity. TiO2 has important photocatalytic properties, and its photoactivation occurs in the ultraviolet (UV) range. The aim of this study was to investigate the toxicity of nano-TiO2 to indicators organisms of freshwater and saline aquatic systems, under different illumination conditions (visible light, with or without UV light). Daphnia similis and Artemia salina were co-exposed to a sublethal dose of UV light and different concentrations of nano-TiO2 in the form of anatase (TA) or an anatase/rutile mixture (TM). Both products were considered practically non-toxic under visible light to D. similis and A. salina (EC50(48h) > 100 mg/L). Exposure to nano-TiO2 under visible and UV light enhanced the toxicity of both products. In the case of D. similis, TM was more toxic than TA, showing values of EC50(48h) = 60.16 and 750.55 mg/L, respectively. A. salina was more sensitive than D. similis, with EC50(48h) = 4 mg/L for both products. Measurements were made of the growth rates of exposed organisms, together with biomarkers of oxidative stress and metabolism. The results showed that the effects of nano-TiO2 depended on the organism, exposure time, crystal phase, and i... Mostrar Tudo |
Palavras-Chave: |
Dióxido de titânio; Microcrustacean; Nano-TiO2; Nanotoxicity; Ultraviolet light. |
Thesagro: |
Crustáceo; Metal; Raio ultravioleta; Toxidez. |
Thesaurus NAL: |
Biomarkers; Daphnia similis; Ecotoxicology; Nanoparticles; Nanotechnology; Titanium dioxide; Toxicity; Ultraviolet radiation. |
Categoria do assunto: |
H Saúde e Patologia |
Marc: |
LEADER 02705naa a2200361 a 4500 001 2003514 005 2014-12-23 008 2014 bl uuuu u00u1 u #d 100 1 $aCLEMENTE, Z. 245 $aMinimal levels of ultraviolet light enhance the toxicity of TiO2 nanoparticles to two representative organisms of aquatic systems.$h[electronic resource] 260 $c2014 520 $aAbstract: A number of studies have been published concerning the potential ecotoxicological risks of titanium dioxide nanoparticles (nano-TiO2), but the results still remain inconclusive. The characteristics of the diverse types of nano-TiO2 must be considered in order to establish experimental models to study their toxicity. TiO2 has important photocatalytic properties, and its photoactivation occurs in the ultraviolet (UV) range. The aim of this study was to investigate the toxicity of nano-TiO2 to indicators organisms of freshwater and saline aquatic systems, under different illumination conditions (visible light, with or without UV light). Daphnia similis and Artemia salina were co-exposed to a sublethal dose of UV light and different concentrations of nano-TiO2 in the form of anatase (TA) or an anatase/rutile mixture (TM). Both products were considered practically non-toxic under visible light to D. similis and A. salina (EC50(48h) > 100 mg/L). Exposure to nano-TiO2 under visible and UV light enhanced the toxicity of both products. In the case of D. similis, TM was more toxic than TA, showing values of EC50(48h) = 60.16 and 750.55 mg/L, respectively. A. salina was more sensitive than D. similis, with EC50(48h) = 4 mg/L for both products. Measurements were made of the growth rates of exposed organisms, together with biomarkers of oxidative stress and metabolism. The results showed that the effects of nano-TiO2 depended on the organism, exposure time, crystal phase, and illumination conditions, and emphasized the need for a full characterization of nanoparticles and their behavior when studying nanotoxicity. 650 $aBiomarkers 650 $aDaphnia similis 650 $aEcotoxicology 650 $aNanoparticles 650 $aNanotechnology 650 $aTitanium dioxide 650 $aToxicity 650 $aUltraviolet radiation 650 $aCrustáceo 650 $aMetal 650 $aRaio ultravioleta 650 $aToxidez 653 $aDióxido de titânio 653 $aMicrocrustacean 653 $aNano-TiO2 653 $aNanotoxicity 653 $aUltraviolet light 700 1 $aCASTRO, V. L. S. S. de 700 1 $aJONSSON, C. M. 700 1 $aFRACETO, L. F. 773 $tJournal of Nanoparticle Research, Dordrecht$gv. 16, n. 8, article 2259, 2014.
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