Nematocysts
Mostrando 1-9 de 9 artigos, teses e dissertações.
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1. Biometric and statistical investigations on the cnidoma of the genus Hydra (Cnidaria, Hydrozoa)
This paper deals about the nematocysts like a source of biometric information for comparison between the species Hydra vulgaris Pallas, 1766, Hydra vulgaris pedunculata Deserti et al., 2011 and Hydra pseudoligactis (Hyman, 1931). This biometric tool lets us carry out statistical comparisons and adding these results to the identification of specimens from dif
Iheringia, Sér. Zool.. Publicado em: 2012-09
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2. Structure of nematocysts isolated from the fire corals Millepora alcicornis and Millepora complanata (Cnidaria: Hydrozoa)
Structural characteristics of discharged and undischarged nematocysts from the hydrozoans Millepora alcicornis and Millepora complanata, two fire corals collected in the Mexican Caribbean, were examined using transmission electron, scanning and light microscopy. In this study, we report for the first time images of the nematocysts found in these Mexican Cari
Journal of Venomous Animals and Toxins including Tropical Diseases. Publicado em: 2012
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3. Preliminary pharmacological studies with the venom obtained from nematocysts of Macrorhynchia philippina (Cnidaria, Hydrozoa) / Estudos farmacológicos preliminares com a peçonha obtida dos nematocistos de Macrorhynchia philippina (Cnidaria, Hydrozoa)
Muitas interações entre organismos são mediadas pela liberação de substâncias biologicamente ativas. Nos Cnidários esse tipo de interação é ainda mais marcante devido a organelas características do grupo, denominadas nematocistos. Usados tanto na captura de alimento quanto para defesa do organismo, os nematocistos contêm toxinas com ações que v
Publicado em: 2010
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4. Caracterização taxonômica e morfométrica de espécies de Medusozoa (Cnidaria) do sul da América: uma análise comparada de materiais do Brasil e da Argentina / Taxonomy and morphometry of South American medusozoan (Cnidaria) species: a compared analysis of Brazilian and Argentinean populations
We performed morphological comparisons between different populations of some species from the Brazilian and Argentinean coast. Our goal was to investigate the existence of morphometrical structure among these populations and the influence of putative barriers, such as the La Plata River. The analyses were based on different sources of data, such as light mic
Publicado em: 2008
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5. Redescrição e ciclo de vida de Clytia gracilis e Clytia linearis (Cnidaria, Hydrozoa, Campanulariidae). / Redescription and life cycle of Clytia gracilis and Clytia linearis (Cnidaria, Hydrozoa, Campanulariidae).
he life-cycles of Clytia linearis (Thornely, 1899) and two species with characters considered diagnostic of Clytia gracilis (M. Sars, 1850) Clytia cf. gracilis sp. 1 and Clytia cf. gracilis sp. 2 have been studied based on specimens collected in the shallow subtidal coast of São Sebastião and Ilhabela, southeast Brazil, between February 1999 and Apri
Publicado em: 2000
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6. NEW RESULTS FROM THE STUDY OF COELENTERATE NEMATOCYSTS: (Preliminary Note)
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7. A switch in disulfide linkage during minicollagen assembly in Hydra nematocysts
The smallest known collagens with only 14 Gly-X-Y repeats referred to as minicollagens are the main constituents of the capsule wall of nematocysts. These are explosive organelles found in Hydra, jellyfish, corals and other Cnidaria. Minicollagen-1 of Hydra recombinantly expressed in mammalian 293 cells contains disulfide bonds within its N- and C-terminal C
Oxford University Press.
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8. Novel role of calcium in exocytosis: mechanism of nematocyst discharge as shown by x-ray microanalysis.
Mature nematocysts of the sea anemones Rhodactis rhodostoma and Anthopleura elegantissima contain a fluid that has a high concentration of solutes and is extraordinarily rich in calcium (ca. 500-600 mmol/kg wet weight); this contrasts with the surrounding cytoplasm which is rich in potassium but poor in calcium. The undischarged capsule is surrounded by a me
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9. Properties of a toxin from the sea anemone Stoichacis helianthus, including specific binding to sphingomyelin.
Stoichactis helianthus toxin, a protein derived presumably from the nematocysts, was purified to homogeneity. It has a molecular weight of about 16,000, an isoelectric pH of 9.8, and it contains approximately 3.7% carbohydrate. It is powerfully hemolytic for erythrocytes derived from a variety of animal species, those of the cat being the most sensitive and