155 research outputs found
Miglioramento e rinforzo sismico in zona sismica: soluzioni non convenzionali per situazioni ricorrenti
No full textEuplotes uncinatus (Ciliophora, Hypotrichia), a new species with zooxantellae
No full textDuring the observations of a field collection of Maristentor dinoferus with fluorescence microscopy, we discovered a smaller ciliate with zooxanthellae. On the basis of morphological, morphometric and ultrastructural characters, this ciliate has been recognized as a new species of the genus Euplotes. To emphasize the peculiar shape and extension of the right buccal margin, the species has been named Euplotes uncinatus sp. n. The most distinctive traits of E. uncinatus are the presence of mucocyst-like vesicles, a kind of extrusome not previously found in Euplotes, and the presence of zooxanthellae. Evidence from ciliate behavior and zooxanthellae ultrastructure make it very likely that the zooxanthellae are symbiotic, even though some are evidently consumed by the host
Euplotes uncinatus (Ciliophora, Hypotrichia), a new species with zooxanthellae
No full textDuring the observations of a field collection of Maristentor dinoferus with fluorescence microscopy, we discovered a smaller ciliate with zooxanthellae. On the basis of morphological, morphometric and ultrastructural characters, this ciliate has been recognized as a new species of the genus Euplotes. To emphasize the peculiar shape and extension of the right buccal margin, the species has been named Euplotes uncinatus sp. n. The most distinctive traits of E. uncinatus are the presence of mucocyst-like vesicles, a kind of extrusome not previously found in Euplotes, and the presence of zooxanthellae. Evidence from ciliate behavior and zooxanthellae ultrastructure make it very likely that the zooxanthellae are symbiotic, even though some are evidently consumed by the host. © Springer-Verlag 2005
5-Fluorouracil-treated planarians, a versatile model system for studying stem cell heterogeneity and tissue aging
No full textBackground Information: Planarians are a sound, well-established model system for molecular studies in the field of stem cells, cell differentiation, developmental biology and translational research. Treated stem cell-less planarians produced by X-ray treatment are commonly used to study stem cell transcriptional profile and their role in planarian biological processes. X-ray induces oxidative and DNA damage to differentiated cells, requires expensive radiation machines that are not available in most of the research centres and demand rigorous risk management and dedicated staff. Results: We tested the use of the well-known antimetabolite genotoxic drug 5-fluorouracil which mainly affects proliferating cells in way to demonstrate its use in replacing X-ray treatment. We succeeded in demonstrating ability of high doses of 5-fluorouracil to deplete Dugesia japonica stem cells and in identifying a 5-fluorouracil transiently resistant population of lineage committed stem cells. Conclusions and Significance: Our results encourage the use of 5-fluorouracil-treated planarians as a model system for studying mechanisms of resistance to genotoxicants, planarian stem cell heterogeneity and molecular cascades of tissue aging
Studio in vitro delle attività di fagocitosi e killing espresse da monocito-macrofagi umani infettati da Rhodococcus equi e valutazione della produzione di IL-6, IL-8 e TNF alfa da parte di linfomonociti umani normali stimolati con tale microrganismo
No full textInduction of human macrophage and endothelial cell oxidative burst and activity in the Limulus Amebocyte Lysate Assay by different Bartonella henselae LPS preparations
No full textProduzione di IL-6, IL-8 e TNF alfa da parte di linfomonociti umani normali stimolati con Rhodococcus equi: ipotesi sul possibile ruolo svolto nel controllo dell’infezione
No full textEffect of lactoferrin supplementation on quadruple therapy after failure of a first attempt to cure Helicobacter pilori infection
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