3,478 research outputs found

    Andrea Bacci - verso

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    Bacci, Andrea (1524-1600). Medico di Sisto V e lettore de\u27 semplici all\u27Università di Roma (1567-1600). Titolo manoscritto sul recto, con estremi cronologici, e altra nota, che recita: Dal front A. Bacci [...] 1899. Montata su cartone 103 x 66 mm 1 fotografia : aristotipo ; 86 x 54 mm. Vai alla scheda bibliografica: https://galileodiscovery.unipd.it/discovery/fulldisplay?context=L&vid=39UPD_INST:VU1&search_scope=MyInst_and_CI&tab=Everything&docid=alma99001497981020604

    Atlas Of Pediatric Ocular Oncology

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    This atlas-book was conceived in the dark evenings during the Covid pandemic to keep the mind busy, not only mine but also the young residents of our clinic. The images that enrich each chapter are part of a life of over 30 years dedicated to ocular oncology, mainly of the pediatric age. A passion and commitment transmitted by my mentor Prof. Frezzotti who treated the first retinoblastoma in 1959. So here, I find myself collecting the most significant images of hundreds of clinical cases faced, diagnosed and treated over the years. Retinoblastoma is obviously the largest part of this atlas due to the over 900 cases observed and treated in Siena. It took almost 3 years...because unfortunately the time left to write, study and publish is the evening hours after long and tiring days of clinical care activities. My long friendship, collaboration and growth together with Paolo Galluzzi has allowed us to add to each chapter MRI notions useful in the differential diagnosis of various pathologies. My friend Rana’a helped correct some chapters and give his contribution on ocular mela- noma in pediatric age. Good friends and colleagues have been added among the collaborators for sending unu- sual and rare cases. I thank Tero Kivela, Sonia De Francesco, Tommaso Bacci, Marco Mazza, Mattia Pasti, Alfonso Cerase, Lucia Monti, Mario Fruschelli and Cristina Menicacci for their precious contributions. An affectionate thought goes to all the young residents who, with great enthusiasm, em- braced the topics assigned to them and carried out the various chapters with curiosity and interest. The drawings were all done by the talented resident Dimitris Pollalis who gave a truly artistic touch to this atlas. This book is dedicated to all ophthalmologists, of all ages, who are passionate, curious and fascinated by their work with the hope that the hundreds of images can help to recognize unusual and complex cases

    Electron beam transfer line design for plasma driven Free Electron Lasers

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    Plasma driven particle accelerators represent the future of compact accelerating machines and Free Electron Lasers are going to benefit from these new technologies. One of the main issue of this new approach to FEL machines is the design of the transfer line needed to match of the electron-beam with the magnetic undulators. Despite the reduction of the chromaticity of plasma beams is one of the main goals, the target of this line is to be effective even in cases of beams with a considerable value of chromaticity. The method here explained is based on the code GIOTTO (Bacci et al., 2016) that works using a homemade genetic algorithm and that is capable of finding optimal matching line layouts directly using a full 3D tracking code

    Thymbra capitata (L.) Cav. and Rosmarinus officinalis (L.) Essential Oils: In Vitro Effects and Toxicity on Swine Spermatozoa

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    Essential oils possess a variety of biological properties (i.e., antioxidant, antibacterial, and cytotoxic) that could possibly be applied in reproductive medicine, but their effects on spermatozoa are still partially unknown. The aim of the study was to describe the effects of Thymbra capitata (L.) Cav. and Rosmarinus officinalis (L.) essential oils on the main morpho-functional parameters of swine spermatozoa. Essential oils were preliminary characterized by gas chromatography and added with emulsifiers to facilitate diffusion. Experimental samples were prepared by suspending a fixed number of spermatozoa in 5 mL of medium with 10 different concentrations of essential oil (0.2–2 mg/mL, at intervals of 0.2). After 3 h of incubation, samples were analyzed for pH, viability, objective motility, and acrosome status. Results showed that the effects of the essential oils are concentration-dependent and that R. officinalis is well tolerated up to 0.6 mg/mL. T. capitata impaired the spermatozoa starting from the lowest concentration, with complete spermicidal effect from 0.4 mg/mL. The patterns of damage, confirmed by SEM, were different and quite distinct. As expected, spermatozoa proved to be sensitive to external stimuli and capable of showing different functional patterns, providing interesting insights to the action/toxicity mechanisms. The results of the present work represent the first step towards the systematic characterization of the effects of these compounds on spermatozoa. This kind of studies are necessary to strengthen the idea of future applications of essential oils in the reproductive field due to their antioxidant, antibacterial, or spermicidal properties

    PROVE DI PULL-OUT SU UN SISTEMA DI ANCORAGGIO PER STRUTTURE PREFABBRICATE

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    L’oggetto del presente studio è il comportamento del collegamento in fondazione di pilastri in strutture prefabbricate. Il nodo di fondazione nei sistemi prefabbricati risulta essere cruciale al fine di garantire l’iperstaticità della struttura, inoltre, dal un punto di vista sismico, la continuità del nodo pilastro fondazione si traduce nella possibilità di sfruttare le capacità deformative dei pilastri garantendo la formazione di cerniere plastiche alla base degli stessi. Nel sistema costruttivo studiato i ferri di ripresa alla base del pilastro vengono introdotti nella fondazione, in fase di montaggio del sistema, mediante degli appositi scatolari di alloggiamento in acciaio, i quali vengono poi riempiti di malta ad alta resistenza al fine di garantire la monoliticità del nodo in opera. L’obiettivo dell’attività sperimentale è quello di investigare l’efficacia dell’aderenza delle barre di armatura posizionate all’interno degli scatolari metallici annegati nella fondazione, sia all’interfaccia esterno fra scatolare e calcestruzzo, che all’interfaccia interno fra malta e barre d’armatura del pilastro. Sono state svolte quindi prove di pull out per indagare lo sfilamento della barra dal getto di malta e dal suo alloggiamento in fondazione. A tal fine sono stati realizzati provini con diverse lunghezze di ancoraggio per determinare l’efficacia dell’aderenza del collegamento. La lunghezza di ancoraggio non è stato l’unico parametro investigato, infatti le prove di pull out sono state svolte applicando sia una forza verticale di tipo monotono che applicando un carico ciclico. Sono stati predisposti anche alcuni provini in cui le barre d’armatura, prima di essere sottoposte alle prove di pull out, sia monotone che cicliche, sono state sottoposte anche a cicli di forze orizzontali, in modo tale da osservare le conseguenze sull’aderenza a sfilamento delle barre indotte dalla trasmissione di forze orizzontali. I cicli di carico, sia verticali che orizzontali, sono volti alla caratterizzazione dell’aderenza delle barre in presenza degli effetti dinamici dovuti ad un sisma. Lo scopo è quello di avere sufficiente conoscenza del comportamento del nodo di fondazione in modo da poter caratterizzare la risposta strutturale di strutture prefabbricate con nodi gettati in opera
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