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| Santos,Mariane Gonçalves; Vitor,Ricardo Vilela; Nakamura,Maurício Gustavo; Morelini,Luana de Souza; Ferreira,Rafaela Scalco; Paiva,Alexandre Giusti; Azevedo,Luciana; Marques,Vanessa Bergamin Boralli; Martins,Isarita; Figueiredo,Eduardo Costa. |
| Organophosphates (OPs) are widely used as pesticides, and its urinary metabolites as well as the blood cholinesterases (ChEs) activity have been reported as possible biomarkers for the assessment of this pesticide exposure. Moreover, the OPs can induce mutagenesis, and the bone marrow micronucleus test is an efficient way to assess this chromosomal damage. This paper reports a study carried out to verify the correlation among the disulfoton exposure, blood ChEs activity, urinary diethyl thiophosphate (DETP), and diethyl dithiophosphate (DEDTP), as well as micronucleated polychromatic erythrocytes (MNPCEs) frequency. Four groups of rats (n=12) were exposed to disulfoton at 0, 2.8, 4.7, and 6.6 mg kg-1 body weight. The blood ChEs activity, urinary DETP and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pesticides/exposure study; Organophosphate/exposure study; Disulfoton/exposure; Dialkyl phosphate/urinary excretion; Blood cholinesterase; Micronucleated polychromatic erythrocytes/frequency. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1984-82502013000100016 |
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| Venâncio,Vinícius Paula; Ferreira,Eric Batista; Brigagão,Maísa Ribeiro Pereira Lima; Paula,Fernanda Borges de Araújo; Barbisan,Luis Fernando; Azevedo,Luciana. |
| A. crassiflora Mart. a Brazilian savannah fruit, is a source of phytochemical compounds that possess a wide array of biological activities, including free radical scavenging. This native fruit proved to potentialize the mutagenic process in previous in vivo investigations. The aim of the present study was to investigate the effects of A. crassiflora Mart. pulp intake on colonic cell proliferation and on the development of Aberrant Crypt Foci (ACF) in male Wistar rats. The animals were fed with either a commercial diet or a diet supplemented with A. crassiflora Mart. pulp mixed in 1%, 10% or 20% (w/w) for 4 weeks or 20 weeks. The carcinogen 1,2-dimethylhydrazine dihydrochloride (4 doses, 40 mg kg-1 each) was used to induce colonic ACF. After euthanasia, the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Aberrant crypt foci; Brazilian savannah; Dimethylhydrazine; Immunohistochemistry; Oxidative stress. |
| Ano: 2013 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1413-70542013000400008 |
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| Alezandro,Marcela Roquim; Almeida,Sandra Aparecida de; Maia,Patrícia Penido; Carvalho,Helenice Aparecida de; Azevedo,Luciana; Vieira,Elisabeth Pizzamiglio. |
| Este trabalho teve por objetivo determinar a composição centesimal e o conteúdo de Daidzeína (D) e Genisteína (G) da cultivar BRS 243 RR por CLAE. O preparo da amostra para cromatografia envolveu a remoção da gordura com hexano . Os analitos foram extraídos com etanol 70% acrescido de 0,1% de ácido acético. As condições cromatográficas otimizadas foram: coluna C18, fase móvel metanol: ácido acético 5% (1:1 v/v), vazão 0,5 mL/minuto, temperatura da coluna 30 °C, volume de injeção 40 µL e leitura em 254 nm. Os parâmetros de validação avaliados foram: linearidade y = 11242 x -37433, r = 0,9976 (D) e y = 18510 x -66761, r = 0,9980 (G); coeficientes de variação dos estudos de precisão intradia CV = 5,3% (D), CV = 6,7% (G) e interdias CV = 8,7% (D), CV = 9,7%... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Soja transgênica; Isoflavonas; Daidzeína; Genisteína; Composição centesimal; CLAE. |
| Ano: 2008 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-20612008000300003 |
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