As perturbações provocadas pelo homem aos ambientes naturais têm suscitado a tomada de consciência da população, no sentido de mitigar os problemas consequentes dessa interferência. O objetivo deste estudo foi verificar a ...

Copper is an essential metal to aquatic animals, but it can be toxic when in elevated concentrations in water. The objective of the present study was to analyze copper effects in zebrafish hepatocytes (ZFL cell-line). The ...

Many aspects of the molecular basis of declarative memory formation, retrieval and extinction have been established in the past few years. These aspects add to, and partly modify, some long-standing concepts on memory disorders. ...

Cellular oxidative stress may promote damage or death in biological systems and may be caused by production of pro-oxidant molecules known as reactive oxygen species (ROS). The aim of this work was to analyze the activity ...

Atualmente, a discussão sobre meio ambiente situa-se nas condições de sua sustentabilidade. Tal discussão decorre da deterioração da natureza e seus recursos não-renováveis. Nesse paper, discutir-se-á a inter-relação da ...

Objetivos: Pesquisar as características da alimentação complementar precoce e as condições socioeconômicas e demográficas das famílias de crianças de 0 a 59 meses que apresentaram doenças respiratórias. Métodos: Comparação ...

Samples of Atlantoraja cyclophora were obtained by bottom-trawling surveys on the outer continental shelf and upper slope of the Rio Grande do Sul State, Brazil, at depths between 100 and 300 m. For a sample of 459 ...

The K562 cell line (chronic myeloid leukemia), sensitive to chemotherapy (non-MDR), and the Lucena cell line, resistant to chemotherapy (MDR) were investigated. The results suggest that both cell lines possess CD34 + CD38 ...

The aim of this study was to characterize the extracellular polysaccharides (EPS) released by a freshwater Thalassiosira sp. (Bacillariophyceae) and evaluate their degradation by heterotrophic microbial populations from ...

Este artigo busca identificar e analisar as representações sociais de Meio Ambiente dos professores e alunos do ensino fundamental das escolas públicas da área urbana e rural em Teófilo Otoni-MG, e sua relação com os ...

A total of 459(245 females, 214 males) Atlantoraja cyclophora was captured by bottom trawl off the coast of Rio Grande do Sul between 30º40'S and 34º30'S during surveys conducted in winter 2001 and summer/autumn 2002 at ...

Specimens of Atlantoraja castelnaui were obtained from seven commercial fishing vessels operating in southeastern Brazilian waters, from March 2005 to April 2006. A total of 53 males, ranging from 17.9 to 111.0 cm in ...

Contamination of blubber tissues by organochlorine pesticides (OC) and PCBs was assessed in female and male pups and juveniles, as well as in adult females and subdominant adult males of the Southern elephant seal, Mirounga ...

The aim of this study was to evaluate the role of cyclooxygenase (COX) in venous vascular reactivity changes after an oral lipid overload (OLO). Venous endothelial function (dorsal hand vein technique) was evaluated in ...

The effects of nitrite (NO2 –) on the Nile tilapia (Oreochromis niloticus) were investigated, due to their relevance to worldwide aquaculture. Hematological parameters – functional haemoglobin (oxy+deoxy-Hb, %), methaemoglobin ...

Este é um estudo quantitativo, exploratório e descritivo. Objetivou identificar a realidade do uso de drogas entre os trabalhadores portuários avulsos no microambiente portuário, no extremo sul do Brasil. A amostra ...

The highest density of aggregates (1.4 3 103 L21) in the hypereutrophic Barra Bonita Reservoir (mean depth of 10.2 m) coincided with the peak population density of the diatom Aulacoseira granulata (2.3 3 106 chains L21), ...

Este texto trata de uma introdução à discussão teórica concernente ao saber ambiental como instrumento interdisciplinar para a produção de saúde. Através da leitura nas idéias de Enrique Leff apresenta o conceito de ambiente ...

The flounder, Paralichthys orbignyanus, is found in coastal and estuarine waters of the Western South Atlantic Ocean. It is being considered for aquaculture due to its high market price and wide tolerance to environmental ...

Copper (Cu) accumulation and regulation of key-genes involved in Cu homeostasis were evaluated infreshwater- and saltwater-acclimated guppies Poecilia vivipara. Fish were exposed (96 h) to environ-mentally relevant ...