193 research outputs found
Marine taxa of Cocconeis on leaves of Posidonia oceanica, including a new species and two new varieties
No full textEight Cocconeis Ehrenberg taxa (species and varieties) epiphytic on the leaves of Posidonia oceanica (L.) Delile were studied by scanning and transmission electron microscopy. Samples of Posidonia oceanica were collected throughout the year from seagrass meadows around the island of Ischia (Gulf of Naples, Italy). On the basis of some peculiar ultrastructural characteristics of the valve areolation, a new species, Cocconeis multiperforata sp. nov., and two new varieties, C. neothumensis var. marina var. nov., and C. scutellum var. posidoniae var. nov., are described. Ultrastructural analysis also revealed new morphological characteristics in C. britannica Naegeli in Kutzing and C. maxima (Grunow) Peragallo and Peragallo, and confirmed observations of other authors for C. molesta var. crucifera Grunow, C. pellucida Grunow in Rabenhorst and C. stauroneiformis (Rabenhorst) Okuno. Our observations on the abundance of the different species provide new information on their distribution and ecology
Risk of malignancy in patients with rheumatoid arthritis, psoriatic arthritis and ankylosing spondylitis under immunosuppressive therapy. a single-center experience
No full textSystemic inflammatory rheumatic diseases are associated with an increased risk of malignancy, in particular of lymphoproliferative disorders. Chronic inflammation, due to the disease itself, generates a microenvironment able to promote cancer development, but it is still controversial whether immunosuppressive therapy may contribute to carcinogenesis. The aim of the study was to evaluate the risk of malignancy in 399 patients affected by rheumatoid arthritis (RA), psoriatic arthritis and ankylosing spondylitis, all treated with either tumor necrosis factor α-inhibitors plus disease-modifying anti-rheumatic drugs (DMARDs) or DMARDs alone. The risk of malignancy in this cohort of patients, observed in the period between 2005 and 2011 at S. Andrea Hospital-Sapienza University of Rome, was compared with that of the general Italian population, matched for age, sex, and area of residence. Fourteen (3.5 %) malignancies, five of which were hematologic, have been observed. The overall cancer risk was not significantly increased in comparison to the general population, whereas the risk of hematologic malignancies appeared significantly higher in RA patients (SIR 4.94, 95 % CI 1.35–12.64), particularly in female gender (SIR 6.9, 0.95 % CI 1.88–17.66). No significant association between therapy and malignancy was demonstrated in RA patients
Ultrastruttura di tre diatomee appartenenti al genere Cocconeis Ehr. epifite di Posidonia Oceanica (L.) Delile
No full textLe specie del genere Cocconeis Ehr. rappresentano la componente maggioritaria della comunità epifitica a diatomee presente sulle fanerogame marine.
Tale componente, che presenta una variabilità specifica piuttosto bassa, risulta costituita da un film di cellule fittamente appressate e distribuite su buona parte della superfice fogliare (Mazzella et al. 1995). Nell’ambito di uno studio sulla distribuzione e successione della comunità epifita su Posidonia oceanica (L.) Delile presente nelle acque dell’isola di Ischia, abbiamo condotto delle osservazioni sull’ultrastruttura di alcune specie. Le specie studiate, C. britannica Näegeli in Kützing, C. maxima (Grunow) Peragallo et Peragallo, C. pseudomarginata Gregory , pur essendo costantemente presenti non dominano la comunità, presentano dimensioni relativamente grandi, habitus solitario e, frequentemente, sono epibionti sulle altre specie congeneri più piccole che costituiscono la gran parte del film epifita.
L’analisi ultrastrutturale, condotta con l’ausilio del microscopio elettronico a scansione e a trasmissione, ci ha mostrato una morfologia delle valve per molti dettagli contrastante con le descrizioni al microscopio ottico, le uniche finora disponibili per queste specie. Ciò è in parte dovuto alla non risolvibilità a basso ingrandimento di alcuni di questi dettagli ma anche alla sovrapposizione in luce trasmessa di elementi strutturali presenti esclusivamente o nella faccia esterna o in quella interna delle valve.
É stato possibile, inoltre, interpretare in un ottica morfo-funzionale alcuni degli elementi strutturali osservati. In particolare il sistema di aggancio delle due valve presente in due delle tre diatomee osservate, che risulta mediato dal preciso incastro di elementi diversi ma visibilmente complementari presenti sulle due valvocopulae.
L. Mazzella, M.C. Buia and L. Spinoccia 1995: Biodiversity of epiphytic diatom community on leaves of Posidonia oceanica. - In: D. Marino & M. Montresor (Eds.) Proceedings of the 13th International Diatom Symposium. Biopress; Bristol. 241-25
Probable dengue virus infection among Italian troops, East Timor, 1999-2000
No full textTo investigate the attack rate and risk factors for probable dengue fever, a cross-sectional study was conducted of an Italian military unit after its deployment to East Timor. Probable dengue was contracted by 16 (6.6%) of 241 army troops and caused half of all medical evacuations (12/24); no cases were detected among navy and air force personnel
Morphology of the diatom genus Campyloneis (Bacillariophyceae, Bacillariophyta), with a description of Campyloneis juliae sp nov and an evaluation of the function of the valvocopulae
No full textA revision of the monoraphid pennate diatom genus Campyloneis Grunow was carried out based on LM and EM observations. The material examined originated from various herbarium collections and from extant epiphytic diatom communities on leaves of Posidonia spp. We also examined the generitype C. grevillei (Smith) Grunow and the fossil material of C. gheyselinchi Reinhold from which the author extracted the type. Our results clarified the fine structure of C. grevillei and C. gheyselinchi. Of the various varieties of C. grevillei, only the variety argus (Grunow) Cleve was retained. This differs from the nominate variety in the arrangement and shape of the areolae adjacent to the sternum of the araphid valve. The newly described taxon Campyloneis juliae De Stefano differs from all Campyloneis species in areolae ultrastructure and morphology of the valvocopulae. As for the fossil species C. gheyselinchi, the sternum valve areolae are similar to those of C. grevillei, but scarcity of frustules in the type material prohibited evaluation of its variability. For this reason we provisionally maintained its rank of species. The elaborate linking systems among the valvocopulae and valves in Campyloneis species appear to provide structural reinforcement against pressure from neighboring epiphytic diatoms and scouring of seagrass leaves.A revision of the monoraphid pennate diatom genus Campyloneis Grunow was carried out based on LM and EM observations. The material examined originated from various herbarium collections and from extant epiphytic diatom communities on leaves of Posidonia spp. We also examined the generitype C. grevillei (Smith) Grunow and the fossil material of C. gheyselinchi Reinhold from which the author extracted the type. Our results clarified the fine structure of C. grevillei and C. gheyselinchi. Of the various varieties of C. grevillei , only the variety argus (Grunow) Cleve was retained. This differs from the nominate variety in the arrangement and shape of the areolae adjacent to the sternum of the araphid valve. The newly described taxon Campyloneis juliae De Stefano differs from all Campyloneis species in areolae ultrastructure and morphology of the valvocopulae. As for the fossil species C. gheyselinchi , the sternum valve areolae are similar to those of C. grevillei , but scarcity of frustules in the type material prohibited evaluation of its variability. For this reason we provisionally maintained its rank of species. The elaborate linking systems among the valvocopulae and valves in Campyloneis species appear to provide structural reinforcement against pressure from neighboring epiphytic diatoms and scouring of seagrass leaves
Mario Bionda. Immagini, erosioni, spazi (1950-1964)
No full textAmong the protagonists of the Informal season, Mario Bionda (1913-1985) is the author of a painting that expresses the intimate human drama, ra contemplation of nature and rarefaction of the image. The works of the 1950s and 1960s, to which this volume is dedicated, layer natural materials and pigments, colours alluding to natural elements (fire, water, earth) in the browns and greens of woods and marshes, in whites, greys and blues. The book recounts Bionda's painting through works from the artist's archive and the collection of the Museo Boschi di Stefano in Milan
Lo sguardo dello scriba. Dialogismo e teatralizzazione in "Nel magma" di Mario Luzi
No full textThe essay reflects on the anomalous, elusive genre set-up of Mario Luzi’s Nel magma, arguing that it is an effective device for representing the subject’s ambiguous relationship with his own time. Within the poems, the subtly anomalous use of lyrical self-diegesis puts the action of the lyric character and the lyric voice in tension, dramatizing the subject reluctance to truly involve himself in a relationship with the Other. To this polarity corresponds, on the macrotextual level, the tension activated between the «deliberately uninspiring» (Verdino) character ‘Mario’ and the mute perspective of the author Luzi, in which one can detect a means, both extreme and oblique, for relativizing (and someway dialogizing) a lyrical Self dramatized and objectified.Il saggio riflette sull’anomalo, sfuggente assetto di genere di Nel magma di Mario Luzi, cogliendovi un potente dispositivo di sceneggiatura delle ambiguità che segnano il rapporto del soggetto con il suo tempo. All’interno dei testi, il peculiare uso dell’auto-diegesi lirica pone in tensione l’azione dell’io personaggio e quella dell’io voce, teatralizzando i limiti di indisponibilità del soggetto a implicarsi davvero in un rapporto con l’Altro. A ciò corrisponde, sul piano macrotestuale, la tensione attivata fra la condotta «volutamente non entusiasmante» (Verdino) del Mario personaggio e la muta prospettiva del Luzi regista, latrice di una estrema, obliqua possibilità di relativizzazione dialogica di quel Sé lirico teatralizzato e obiettivato.  
Certi pomeriggi non passano mai:Some Afternoons Never Seem to End
No full textCerti pomeriggi non passano mai by Mario Fortunato is a short and engaging theatre monologue that analyzes the tension created by waiting for a beloved who is late for an appointment. The wait stretches for hours and creates controversial emotions and anxiety ironically described by the author, with hilarious moments that go from drama to comedy to the surreal, in a sort of ‘one man’ Waiting for Godot. The text was freely adapted and performed in Italian, with some parts in German and English. Theatralia is an international collective of performers and artists who explore texts through physical theatre, live art & music, inventive digital art, and audience participation that was founded by Filomena Campus in 2003. Since 2006 Theatralia’s productions have been sponsored by the Arts Council England. Their much acclaimed production Misterioso. A Journey into the Silence of Thelonious Monk, written by Stefano Benni, was presented at London Riverside Studios and at the Edinburgh Festival.
Filomena Campus is a theatre director and a Jazz musician. Productions include Not in My Name inspired by The Living Theatre and U238 by Marco Paolini. Filomena has also worked as university lecturer in London. For more details see: www.filomenacampus.com Mario Fortunato is an author, literary critic, and the former Director of the Italian Cultural Institute in London. His publications include: Luoghi naturali, L’arte di perdere peso, I giorni innocenti della Guerra, Allegra Street, Il viaggio a Paros, and L’Italia degli altri. He regularly writes for the Italian news magazine L’Espresso
"Il parteggiatore. Diario senese" (settembre 1943-giugno 1944)
No full textIl contributo costituisce l'edizione critica, corredata da introduzione e vasto apparato di note esplicative, di un diario finora inedito di Mario Verdone – uno dei maggiori storici del cinema del secondo dopoguerra –, relativo al periodo settembre 1943-giugno 1944 ovvero durante la fase di occupazione tedesca. Nell'introduzione vengono affrontati alcuni problemi metodologici sia di carattere storico-critico che di carattere editoriale. Il testo di Verdone - tramandato in forma dattiloscritta dall'autore all'interno del proprio archivio, ora presso la Biblioteca comunale di Siena - è stato ricomposto e sottoposto ad un'analisi critica, al fine di comprenderne le modalità di stesura e di valutare le fonti utilizzate per la sua composizione. Il testo in questione è stato inoltre attentamente vagliato in riferimento alla vasta bibliografia relativa alla storia della Resistenza in area senese e toscana. Di tale analisi viene dato ampio riscontro nelle note a pie' di pagina.The essay is the critical edition, accompanied by an introduction and explanatory notes, of an unpublished diary by Mario Verdone - one of the greatest historians of cinema active in the second post-war period -, relating to the period September 1943-June 1944 during the German occupation phase of the 'Central Italy. In the introduction, some methodological problems of both a historical-critical and editorial nature are addressed. Verdone's text - handed down in typewritten form by the author in his own archive - has been reassembled and subjected to a critical analysis, in order to understand the methods of drafting it and to evaluate the sources used for its composition. The text in question was also carefully examined in reference to the vast bibliography relating to the history of the Resistance in the Sienese and Tuscan areas. This analysis is amply confirmed in the footnotes
Forecast horizon of 5th – 6th – 7th long wave and short-period of contraction in economic cycles
No full textThe purpose of this essay is to determine the forecast horizon of the fifth, sixth and seventh long wave. As the period of each long wave can change according to the data, it has been used a deterministic approach, based on historical chronologies of USA and UK economies worked out by several scholars, to determine average timing, period and forecast error of future long waves. In addition, the analysis shows that long waves have average upwave period longer than average downwave one. This result is also confirmed by US Business Cycles that have average contractions shorter than expansions phase over time.Forecast Horizon, Long Waves, Kondratieff Waves, Business Cycles, Asymmetric Path
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