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	Provedor de dados BABT (2) Autor Pfeiffer,Wolfgang C. (2) Andrade,Luciana (1) Borges,Alexandre Luiz N. (1) Campos,Alexandre N. (1) Farina,Marcos (1) Guimarães,Jean R. (1) Keim,Carolina N. (1) Moraes,Rosane B.C. (1) Mais... Palavra-chave Detoxification (1) Excretion (1) Glycogen granules (1) Heavy metals (1) Penaeus (1) Polyphosphate granules (1) Sediment (1) Sepetiba Bay (1) Toxicity (1) Zinc (1) Mais... Tipo do documento Info:eu-repo/semantics/article (2) Ano 2004 (1) 1999 (1) País Brazil (2) Idioma Inglês (1) Português (1)		Ordenar por:  Relevância Autor Título Ano Registros recuperados: 2 Primeira ... 1 ... Última Zinc detoxification by a cyanobacterium from a metal contaminated bay in Brazil BABT Andrade,Luciana; Keim,Carolina N.; Farina,Marcos; Pfeiffer,Wolfgang C.. We describe here the trapping of zinc in polyphosphate granules of the cyanobacterium Synechocystis aquatilis NPBS-3. Cells were cultured in 25 µM of zinc chloride and prepared for electron microscopy and energy-dispersive X-ray analysis. Some ultrastructural features were changed by zinc exposure, the increase of glycogen granules number being the main change. The polyphosphate granules contained phosphorus, sulphur, calcium, iron and zinc. The trapping of zinc in polyphosphate granules seemed to be an effective way of detoxifying the metal and surviving in the bay. As a non-specific mechanism, these polyphosphate granules could also be effective in trapping other metals in excess. Tipo: Info:eu-repo/semantics/article Palavras-chave: Heavy metals; Zinc; Sepetiba Bay; Polyphosphate granules; Glycogen granules; Detoxification. Ano: 2004 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000100020 Efeito de sedimentos contaminados sobre a excreção de nitrogênio do camarão Penaeus paulensis BABT Moraes,Rosane B.C.; Pfeiffer,Wolfgang C.; Guimarães,Jean R.; Borges,Alexandre Luiz N.; Campos,Alexandre N.. Physiological response (ammonia excretion) of the shrimp Penaeus paulensis exposed to contaminated sediments of Guanabara Bay and Sepetiba Bay (Rio de Janeiro - Brazil), was monitored for 52 days. The toxicity tests were conducted in aquarium with a water feedback system and a sediment layer of 2 cm. The sediment from Saco do Engenho (Sepetiba Bay) was the most toxic, affecting the excretion of P. paulensis. In sediment from Sepetiba Bay the ammonia excretion was significantly enhanced after 10 days (S. Engenho) and 52 days (I. Madeira) of exposition. Tipo: Info:eu-repo/semantics/article Palavras-chave: Sediment; Toxicity; Excretion; Penaeus. Ano: 1999 URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89131999000400012 Registros recuperados: 2 Primeira ... 1 ... Última

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