Ascidians
Mostrando 1-12 de 39 artigos, teses e dissertações.
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1. Efecto inhibidor del dióxido de germanio sobre el biofouling del puerto de Mar del Plata
ABSTRACT Marine biofouling on any new material immersed in seawater can lead to extra costs due to increased maintenance, or/and even mechanical wear, and/or biodeterioration that require costly antifouling measures. Fouling organisms growing on immersed manmade surfaces affect hulls, piers, buoys, aquaculture and pipes mainly. Following adsorption of a cond
Matéria (Rio J.). Publicado em: 05/03/2018
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2. Antimicrobial (including antimollicutes), antioxidant and anticholinesterase activities of Brazilian and Spanish marine organisms – evaluation of extracts and pure compounds
Abstract This work describes the antimicrobial, antioxidant and anticholinesterase activities in vitro of organic extracts from fourteen seaweeds, eleven sponges, two ascidians, one bryozoan, and one sea anemone species collected along the Brazilian and Spanish coast, as well as the isolation of the diterpene (4R, 9S, 14S)-4α-acetoxy-9β,14α-dihydroxydolas
Rev. bras. farmacogn.. Publicado em: 2015-12
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3. Introduced and native Phlebobranch and Stolidobranch solitary ascidians (Tunicata: Ascidiacea) around Salvador, Bahia, Brazil
The Port of Salvador (12°58'S, 38°30'W) receives cargo ships from different regions such as southeast Asia, North Atlantic, Mediterranean, Africa, North and South America. Thus, the presence of this port enhances the probability of new species arriving and establishing in Todos os Santos Bay (TSB), in which the port is located. Ascidians are sessile filter
Zoologia (Curitiba). Publicado em: 2012-02
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4. CaracterizaÃÃo das AscÃdias em RegiÃes PortuÃrias do Cearà / Characterization of Ascidians in port regions of CearÃ
The ascidians are marine benthic invertebrates with worldwide distribution in oceans, occuring from intertidal zones to great depths. The brief planctonic lifetime of ascidians result in a restricted natural dispersion, indicating a potential high endemism. However, in response to the rapid economical development in coastal cities, constructions of harbors a
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 17/09/2010
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5. Estudo da diversidade dos micro-organismos associados a ascÃdias coloniais (Tunicata, Ascidiacea) / Study of the diversity of micro-organisms associated with colonial ascidians (Tunicata, Ascidiacea)
A simbiose com micro-organismos à bem conhecida em diversos tÃxons de invertebrados marinhos. No entanto, pouca ou quase nenhuma informaÃÃo hà sobre essa interaÃÃo para os animais do litoral brasileiro. Micro-organismos tem sido apontados ainda como os responsÃveis pela produÃÃo de compostos com atividades biolÃgicas interessantes presentes em ani
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 13/08/2010
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6. Non indigenous ascidians in port and natural environments in a tropical Brazilian bay
Despite limited natural dispersal, some species of ascidians can be transported vast distances via oceanic petroleum platforms, ship hulls and ballast water and therefore may be good indicators of bioinvasion. Usually non indigenous species (NIS) are abundant in harbors. This is caused in part because of the higher propagule delivery rate in these areas. An
Zoologia (Curitiba). Publicado em: 2010-04
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7. Antibacterial modified diketopiperazines from two ascidians of the genus Didemnum
A investigação química do extrato bruto de uma ascidia do gênero Didemnumlevou ao isolamento das dicetopiperazinas modificadas rodriguesinas A (1) e B (2) na forma de uma mistura de homólogos, os quais puderam ser identificados pela análise de seus dados espectroscópicos inclusive experimentos MS/MS. A investigação de uma segunda ascídia do gênero
Journal of the Brazilian Chemical Society. Publicado em: 2009
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8. As associações epizóicas de Hydrozoa (Cnidaria: Leptothecata, Anthoathecata e Limnomedusae): I) Estudo faunístico de hidrozoários epizóicos e seus organismos associados; II) Dinâmica de comunidades bentônicas em substratos artificiais em São Sebastião, SP. / The epizoic associations within Hydrozoa (Cnidária: Leptothecata, Anthoatehcata and Limnomedusae): I) Faunistic study of the epizoic hydrozoans and their associated organisms; II) The dinamics of benthic communities on artificial substrates from São Sebastião, SP.
2.1 The associations between animal groups and species of sponges are relatively well known and described in the literature. Of all the cnidarian groups, the most diverse associations with sponges are found among the hydrozoans. In this study, 117 species of epizoic hydroids were found on two classes of sponge substrates (Hexactinellida and Demospongiae). Th
Publicado em: 2007
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9. Population biology and fecundity of Leucothoe sp. (Crustacea, Amphipoda, Leucothoidae) associated to Phallusia nigra (Chordata, Tunicata) from the São Paulo Sebastião, northern of the State of São Paulo / Biologia populacional e fecundidade do anfipode endobionte Leucothoe sp. (Crustacea, Amphipoda, Leucothoidae) associado a Phallusia nigra (Chordata, Tunicata) do Canal de São Sebastião, litoral norte do estado de São Paulo
The aim of this study was to characterize the population biology and the fecundity of the gammaridean amphipod Leucothoe sp. associated to the ascidia Phallusia nigra on the Channel of São Sebastião, situated in the north coast of Estado de São Paulo, analyzing aspects such as population structure, growth, sex-ratio, fecundity, sexual dimorphism and morta
Publicado em: 2007
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10. Os Botryllinae (TUNICATA: ASCIDIACEA) do Litoral Tropical Brasileiro / The Botryllinae (Tunicata: Ascidiacea) from the Brazilian Coast
The subfamily Botryllinae is composed of colonial ascidians present in all oceans circunglobally. The botryllinids form thin encrusting sheets, with zooids seldom reaching 3mm in length. Botryllinids comprise two genera, Botryllus and Botrylloides, but the validity of the later is currently questionated. The present work aimed to describe the Botrylllinae fr
Publicado em: 2007
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11. Chemical study and evaluation of cytotoxic activity from ascidians Didemnum psammatodes (Sluiter, 1895) and Eudistoma vannamei Millar, 1977 (Tunicata: Ascidiacea) / Estudo químico e avaliação da atividade citotóxica das ascídias Didemnum psammatodes(Sluiter, 1885) e Eudistoma vannameiMillar, 1977 (Tunicata: Ascidiacea)
Samples of Didemnum psammatodes were collected in Icapui (Ceara State) and Trairi (Ceara State). The methanolic extract from D. psammatodes, acquired from Icapui, was submitted to fractionation and purification through several chromatographic techniques and were obtained four nucleosides (2?-deoxyuridine, 2- deoxyinosine, thyimidine, and 2?-deoxyguanosine),
Publicado em: 2006
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12. Ascidians at Currais islands, Paraná, Brazil: taxonomy and distribution
As Ilhas Currais são formadas por um grupo de três pequenas formações rochosas localizadas no Estado do Paraná, sul do Brasil, sendo um local de interesse para o estudo do grupo Ascidiacea. A diversidade da região sublitoral local é bastante alta, e Currais foi recentemente proposto como local a ser transformado em Unidade de Conservação. Foi desenv
Biota Neotropica. Publicado em: 2005