Mollusc
Mostrando 25-36 de 83 artigos, teses e dissertações.
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25. Purificação e caracterização de uma β-glucuronidase extraída do molusco mesogastropoda ampularidade Pomacea sp
This work studies the involved enzymatic way in the metabolism of glycosaminoglycans sulfateds in the mollusc Pomacea sp. Had been identified endoglycosidases and exoglycosidases in the enzymatic extract of the mollusc Pomacea sp by means of hydrolysis activity in condroitim sulphate of whale cartilage and of the p-Nitrofenil-β-glucuronide, respectively
Publicado em: 2006
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26. ASPECTOS DA BIOGEOQUIMICA DO MERCÚRIO EM LAGOS NA PLANICIE COSTEIRA DO SUL DO RIO GRANDE DO SUL
Mercury is one of the most hazardous contaminant in aquatic environment. Mercury contamination in aquatic environment food webs can be severe and persistent, and fish are a major source of mercury contamination in humans across food web. In this study: - Was measured mercury levels at three lakes in southern Brazil and assessed relationships between mercury
Publicado em: 2006
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27. Determinação de ions metalicos em moluscos bivalves do manguezal da região petrolifera de São Francisco do Conde - Reconcavo Baiano / Determination of metallic ions in bivalve molluscs from the petroliferous region of São Francisco do Conde Mangrove - Reconcavo Baiano
The pollution of oceans, bays and estuaries as a result of industrial and domestic effluents that contain metallic ions is one of the most important factors that lead to the contamination of bivalve molluscs. These organisms are greatly affected by the bioaccumulation of inorganic species, even at low concentrations, reflecting the environmental contaminatio
Publicado em: 2006
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28. Análise da influência da geoquímica do ambiente e das características do substrato na estruturação da população de Corbicula flumínea, MULLER 1974, (Mollusca, Bivalvia) no reservatório da usina elétrica de Volta Grande - MG/SP
Corbicula fluminea (Müller, 1774) is a very common fresh water bivalve specie in Asiatic continent. Nowadays can be found widespread distributed in Europe, North and South America. Considering their high reprodutive rate and spreading capacity of their juvenile plancton forms, this bivalve could be considered as a highly invading specie, being a dominant co
Publicado em: 2006
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29. Caracterização limnológica e análise de comunidades bentônicas sujeitas à invasão por espécies exóticas, em lagos do Vale do Rio Doce, MG, Brasil / Limnological characterization and analysis of benthic communities subject to the invasion by exotic species in Rio Doce Valley lakes, MG, Brazil
Benthic macroinvertebrates are important components of aquatic ecosystems due to their role in the energy flow and material cycling. They have gradually received more attention in ecological studies in the last decades. The present study aimed a comparative limnological characterization of four lakes belonging to the middle Rio Doce Valley lacustrine system,
Publicado em: 2006
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30. Sulfatase de fÃgado do molusco Aplysia cervina solÃvel e imobilizada em suportes sÃlidos
A heparin specific sulfatase (EC 3.1.6.1.) was identified in the liver of the mollusc Aplysia cervina, widely found in the Northeastern Brazilian coast. This enzyme was purified by ammonium sulfate and acetone precipitations and by affinity chromatography using Heparin-Sepharose CL-6B. Some physical chemical and kinetics properties of this 89.7-fold purified
Publicado em: 2004
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31. SANDY BEACH MORPHODYNAMICS AND MACROBENTHIC COMMUNITIES IN TEMPERATE, SUBTROPICAL AND TROPICAL REGIONS - A MACROECOLOGICAL APPROACH
A comprehensive study involving 52 microtidal beaches spanning from reflective to dissipative states and located in tropical, subtropical and temperate regions in the Atlantic, Pacific and Indian oceans was carried out to unravel the relative roles of latitude and beach morphodynamics in determining beach macrobenthic species richness, abundance, biomass and
Publicado em: 2003
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32. Susceptibility of Biomphalaria straminea (Dunker, 1848) from Serra da Mesa Dam, Goiás, Brazil to infection with three strains of Schistosoma mansoni Sambon, 1907
Ecological changes from water resources development projects often affect the epidemiology of water-associated diseases. In order to investigate the occurrence and distribution of freshwater snails of medical and veterinary importance in the area of influence of the Serra da Mesa Hydroelectric a survey has been performed since 1997 and revealed the occurrenc
Memórias do Instituto Oswaldo Cruz. Publicado em: 2002-10
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33. Plesiophysa dolichomastix sp. n. (Gastropoda: Planorbidae)
A new species of planorbid mollusc, Plesiophysa dolichomastix (Greek dolichos = long, mastix = flagellum), collected from Lagoa da Pedra, municipality of Santa Rosa, state of Goiás, Brazil (15°01'S, 47°13'W) is described. It is indistinguishable by the shell characters from the five congeneric species described so far: P. striata (Orbigny, 1841), P. granu
Memórias do Instituto Oswaldo Cruz. Publicado em: 2002-06
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34. Estudo do crescimento e da reprodução de Leptinaria unilamellata (D'orbigny) (Mollusca, Subulinidae) em laboratório
Biological aspects of Leptinaria unlamellata (d'Orbigny, 1835) were studied, such as: onset of sexual maturity, occurrence of self-fertilization and shell length measurement at different stages of development. In isolated specimens of L. unilamellata, sexual maturity was reached at 74 days (minimum time) and 104 days (maximum time). For the grouped specimens
Revista Brasileira de Zoologia. Publicado em: 2001-12
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35. Estudo do crescimento e da reprodução de Bradybaena similaris (Férussac) (Mollusca, Xanthonychidae) em laboratório
Biological aspects of Bradybaena similaris (Férussac, 1821) were studied, such as: onset of sexual maturity, occurrence of self-fertilization, oviposition, incubation period, eclosion rate and shell length measurement at different stages of development. It was noted that in isolated B. similaris the minimum and maximum time for reaching sexual maturity were
Revista Brasileira de Zoologia. Publicado em: 2001-12
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36. Infection by Schistosoma mansoni sambon 1907 in the first four months of life of Biomphalaria straminea (Dunker, 1848) in Brazil
Compatibility between Schistosoma mansoni and Biomphalaria straminea when exposed to the parasite on the first four months of age was assessed for five parasitological aspects: indices of infection and mortality, duration of precercarial and cercarial periods, and rate of cercarial emission. Infections were made on molluscs from laboratory colonies, at the f
Memórias do Instituto Oswaldo Cruz. Publicado em: 2001-09