In vitro and in vivo inhibition of acetylcholinesterase and carboxylesterase by metals in zebrafish (Danio rerio)

Metals are natural components in ecosystems; however, if these elements are in excess, they can have adverse effects on living organisms. This study analyzes the interference of copper, lead, iron and cadmium in acetylcholinesterase (AChE) and carboxylesterase (CbE) activities in zebrafish. AChE was significantly inhibited in vitro by copper, iron, lead and cadmium at higher concentrations (10 and 20 mmol/L), whereas CbE was inhibited only at a concentration of 20 mmol/L. In vivo, only lead and cadmium were able to cause AChE inhibition at higher concentrations, while iron didn't cause any changes, and copper promoted an increase in AChE activity at a concentration of 0.06 mg/L. CbE activity did not change at any of the times (two and seven days) and concentrations tested, except in the case of copper exposure, which resulted in a decrease in CbE activity. Indeed, iodoacetamide treatment didn't changed AChE neither CbE activities, results which indicate that the metal inhibiting effect is probably not due to its biding to thiol groups close the active site of the enzyme. This outcome reveals that metals are important esterase inhibitors in zebrafish, and should be considered in environmental monitoring studies that use esterase inhibition as exposure biomarkers of organophosphate and carbamate pesticides. © 2012 Elsevier Ltd. All rights reserved.

Experiência subjetiva de idosas durante exercício em ambiente virtual

This quali-quantitative study aimed to verify subjective exercise experiences of older women before and after exercise sessions in actual and virtual conditions, as well as, the preferred exercise condition. The sample was composed by 20 older women (71.1±6.5 years-old) who practiced dance sessions in actual and virtual conditions, and answered the Subjective Exercise Experiences Scale (SEES) before and after the activity. In virtual condition it was used the virtual game Just Dance I from the Nintendo Wii® console. In actual condition participants reproduced the same game movements, as demonstrated by the researcher. Wilcoxon and Mann-Whitney tests were used for data analyses (p<0.05). Significant decrease was observed in the psychological distress score of SEES after both conditions. Increase in positive well being score was found only in the virtual condition. Most of the older women chose the actual condition as the preferred.

O revelar da paixão: as relações estabelecidas entre coreógrafo, bailarinos e obra no processo de criação do Pas de Deux de Bachiana n.1

Pós-graduação em Artes - IA

Bodas de Sangue, de Carlos Saura: releitura do musical clássico

Pós-graduação em Artes - IA

Japoneses aqui, brasileiros lá?: uma leitura sobre (e dos) dekasseguis

Pós-graduação em Geografia - FCT

Deusa das noites: personagens (des)veladas

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

As artes e as técnicas do ser e do saber/fazer em algumas atividades no cotidiano da comunidade Kalunga do Riachão

Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)

Educação infantil e ensino fundamental: bases orientadoras à aquisição da leitura e da escrita e o problema da antecipação de escolaridade

Pós-graduação em Educação - FFC

Música e identidade na América Latina: o caso de Agustín Barrios Mangoré

Pós-graduação em Música - IA

José Siqueira e o coco de embolada erudito: por uma performance etnomusicológica contemporânea

Pós-graduação em Música - IA

Os ritos das danças Xondaro e do Terreiro da Aldeia Guarani M'bya - Aguapeú e das danças circulares

Pós-graduação em Ciências da Motricidade - IBRC

Professores de street dance do estado de São Paulo: formação, saberes e ensino

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

Os saberes da experiência discente: um estudo de caso na educação física

Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)

As atividades rítmicas e a educação física escolar: possibilidades de um trato em um outro ritmo

Pós-graduação em Ciências da Motricidade - IBRC

Sensibilidade: o percurso do aprender corporal

Pós-graduação em Ciências da Motricidade - IBRC