727 resultados para Savignano, Guidi, Rotonda, Muratura, Marconi


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The sediments of Hydrate Ridge/Cascadia margin contain extensive amounts of gas hydrate. A total of 57 sediment samples including gas hydrate were preserved in liquid nitrogen and have been imaged using computerized tomography to visualize hydrate distribution and shape. The analysis gives evidence that gas hydrate in vein and veinlet structures is the predominant shape in the deeper gas hydrate stability zone with dipping angles from 30° to 90°(vertical).

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Ecological succession provides a widely accepted description of seasonal changes in phytoplankton and mesozooplankton assemblages in the natural environment, but concurrent changes in smaller (i.e. microbes) and larger (i.e. macroplankton) organisms are not included in the model because plankton ranging from bacteria to jellies are seldom sampled and analyzed simultaneously. Here we studied, for the first time in the aquatic literature, the succession of marine plankton in the whole-plankton assemblage that spanned 5 orders of magnitude in size from microbes to macroplankton predators (not including fish or fish larvae, for which no consistent data were available). Samples were collected in the northwestern Mediterranean Sea (Bay of Villefranche) weekly during 10 months. Simultaneously collected samples were analyzed by flow cytometry, inverse microscopy, FlowCam, and ZooScan. The whole-plankton assemblage underwent sharp reorganizations that corresponded to bottom-up events of vertical mixing in the water-column, and its development was top-down controlled by large gelatinous filter feeders and predators. Based on the results provided by our novel whole-plankton assemblage approach, we propose a new comprehensive conceptual model of the annual plankton succession (i.e. whole plankton model) characterized by both stepwise stacking of four broad trophic communities from early spring through summer, which is a new concept, and progressive replacement of ecological plankton categories within the different trophic communities, as recognised traditionally.

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In 1990, a benthic component to the DYFAMED (dynamics of fluxes in the Mediterranean) program, the DYFAMED-BENTHOS survey, was established to investigate the possible coupling of benthic to pelagic processes at a permanent station in >2700 m water depth, 52 km off Nice, France. Surface sediment was first sampled at different periods of the year to assess the importance of the biological compartment (particularly metazoan meiofauna) and its relation to seasonally varying particulate matter input to the sea floor (estimated by measuring surface sediment particle size and porosity, as well as chloroplastic pigments, organic carbon, nitrogen and calcium carbonate contents). Beginning in 1993, surface sediment was sampled at an average interval of 1.4 months for over five consecutive years using multicorers. Biogeochemical techniques such as deployments of a free-vehicle benthic respirometer and a near-bottom sediment trap, along with analyses of sediment vertical profiles for dissolved oxygen, nutrients and dissolved metals in the porewater, were developed in conjunction with more extensive biological analyses to characterize the recycling of organic matter, and ultimately increase our understanding of the oceanic carbon cycle. This article provides the scientific background and motivation for the development of the on-going DYFAMED-BENTHOS survey, the general characteristics of the benthic site, as well as a detailed description of the sampling design applied from late 1990-2000.

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Estratta dal giornale musicale Boccherini.

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Mode of access: Internet.

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Includes bibliographical references and bibliographical footnotes.

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Giovanni di ser Giovanni Guidi; D: 3 ft. 1/2 in. (painted surface); tempera, silver, and gold on wood

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Giovanni di ser Giovanni Guidi; D: 2 ft. 5 39/64 in. (painted surface); tempera, silver, and gold on wood

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Italian words.

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Mode of access: Internet.

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Mode of access: Internet.

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Mode of access: Internet.

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v. 1. Biographical introduction. Critical introduction. Chronological bibliography. Battle of Marathon. Essay on mind. Juvenilia. The Seraphim, and other poems--v. 2. Romaunt of Margret. Drama of exile. Lady Geraldine. Vision of poets, and other poems.--v. 3. Duchess May. Sonnets from the Portuguese. Casa Guidi windows. Poems before congress.--v. 4-5. Aurora Leigh.--v. 6. Last poems. Translations. Greek Christian poets. Book of the poets. Miscellanies.

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Mode of access: Internet.

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Vol. 2 includes the following reprints: Osservazioni sopra li libro della Felsina pittrice, per difesa di Raffaello da Urbino, dei Carraci e della loro scuola, pubblicate e divise in sette lettere da D. Vincenzo Vittoria ... Roma, Stamparia di G. Zenobj, 1703; Lettere familiari scritte ad un amico in difesa del conte Carlo Cesare Malvasia ... da Gio. Pietro Cavazzoni Zanotti, pittore ... Bologna, C. Pisarri, 1705; Dialogo di Gio. Pietro Cavazzoni Zanotti, pittore bolognese, in difesa di Guido Reni, steso in una lettera al Sig. dottor Girolamo Baruffaldi ... Venezia, A. Bortoli, 1710.