Photodynamic action has been advocated as an alternative treatment of tumors but the most common used dyes, hematoporphyrin derivatives, are substrate for P-glycoprotein. This study investigated the MDR-reverting properties ...

Imposex is characterized by the development of male characteristics, such as the penis and vas deferens, in female prosobranch gastropods, caused by organotin compounds contamination. In Brazil, imposex was observed in the ...

(Análise da morfologia do fruto em espécies de Cyperus L. subg. Cyperus - Cyperaceae). Este trabalho apresenta uma análise da morfologia do fruto e da sua superfície em 16 táxons de Cyperus L. subg. Cyperus ocorrentes na ...

Research on organotin compounds (OTCs) contamination in South America is focused on sand/rocky environments; estuar-ine areas have not yet been investigated. Imposex is an important tool to evaluate OTC contamination. The ...

The use of antifouling paints containing the biocide compound tributyltin (TBT) has been shown as an inductor of imposex in neogastropods mollusks. Imposex is characterized by the development of male features in females, ...

There are indications that the widespread use of organotin compounds (TBT and TPT) as antifoulings,as stabilizers in plastic and as pesticides,has severely affected several species of marine organisms.The most striking ...

A total of 600 Stramonita haemastoma (Mollusca: Muricidae) individuals, free of imposex, were transplanted into a marina with an intense ship flow. Thirty individuals were collected periodically until 210 days and analyzed ...

Imposex in gastropod mollusks is an efficient and low-cost biomarker for pollution by organotin compounds. Such substances are typically found in areas with an intense flux of vessels, such as marinas and harbors. This ...

Marine organisms are affected by organotin compounds due to the cumulative, deleterious effects of these latter. The most evident and well known consequence of organotin contamination is imposex, a hormonal disruption that ...

The use of OTC (organotin compounds) as biocides in naval antifouling paints causes impacts on non-target organisms. One of these impacts is a syndrome called imposex in gastropod molluscs. Imposex is the imposition of ...

Imposex is characterized by the development of masculine sexual organs in neogastropod females,caused by organotin contamination of the seawater. These compounds,as tributyltin (TBT), are used world-wide as biocidal agents ...

O objetivo deste estudo foi analisar o modelo de organização tecnológica da Vigilância à Saúde, nos 22 municípios da 3ª Coordenadoria Regional de Saúde - RS, examinando elementos do seu processo de trabalho e o perfil dos ...

Waterborne Cu effects on the transcription of genes encoding ion-transporting proteins and the activities of these proteins were evaluated in gills of the blue crab Callinectes sapidus acclimated to diluted (2%) and full ...

In vivo and in vitro studies were performed to evaluate acute toxicity, organ-specific distribution, and tissue accumulation of copper in Callinectes sapidus acclimated to two different experimental salinities (2 and 30 ...

Kroyeria brasiliense sp. nov. from the shark, Galeorhinus vitaminicus de Buen, 1950, from Rio Grande do Sul, State, Brazil, is described on the basis of 14 adult females. The new species is superficially similar to Kroyeria ...

A aveia (Avena spp.) é uma das culturas mais importantes do Sul do Brasil durante a estação hibernal de crescimento. Sabe-se que nela existem agentes alelopáticos, o que torna conveniente o entendimento deste fenômeno na ...

Com o objetivo de estimar e comparar a diversidade e flutuação populacional das famílias de Hymenoptera em área de restinga foi realizado um levantamento faunístico em duas áreas de restinga com diferentes níveis de ...

A fauna entomológica na restinga da Ilha dos Marinheiros, no estuário da laguna Lagoa dos Patos, foi inventariada entre setembro de 2003 a agosto de 2004, utilizando-se a armadilha malaise. Foram coletados 21.449 insetos ...

L´allaitement maternel est la forme la plus naturelle et la plus sûre d´allaiter un enfant en bas âge. L´objectif de cette étude a été de caractériser les habitudes d´allaitement d´enfants de zéro a six mois de vie par ...

The orange disease is considered the main parasitosis in Perna perna mussel.It is caused by a complex life cycle bucephalid, involving three hosts, among them mollusks and fishes. With the aim of contributing to the ...