1,721,039 research outputs found
herpes zoster infection followed by Henoch-Schonlpurpura in a girl receiving infliximab for ulcerative colitis
No full textSchonlein-Henoch purpura and Herpes zoster infection after infliximab therapy for ulcerative colitis
No full textI sonetti
No full textBelli tenne sempre nascosti i suoi Sonetti, che mostrò e recitò solo ad amici fidati. Dei 23 pubblicati durante la sua vita, solo uno uscì con il suo consenso: un omaggio in versi all’attrice Amalia Bettini che apparve nel 1835 su una rivista teatrale milanese. Meditò tuttavia a lungo di pubblicarli, a partire dal 1831, quando cominciò a sgorgare fluente la sua vena romanesca, che produrrà oltre duemila sonetti prima di arrestarsi nel turbine politico e militare che sconvolse Roma nel 1848-49. Coabitarono in lui la tentazione di bruciarli e la volontà di predisporli per una stampa futura, magari postuma. Nelle sue carte testamentarie ordinò di distruggerli ma affidò in mani sicure i loro autografi, corredati da preziose note per lettori non romani, e disconobbe le copie apocrife o deformate che circolavano sotto il suo nome, in manoscritti o in opuscoli stampati alla macchia. La prima vera edizione delle Poesie inedite belliane, che uscì nel 1865-66, due anni dopo la morte del poeta, a cura del figlio Ciro, contiene 166 poesie italiane in vario metro e 797 sonetti romaneschi, un terzo circa del corpus. Per prevenire la censura pontificia vennero scartati i testi di satira politica e religiosa e quelli di materia erotica. I sonetti inclusi vennero depurati dalle espressioni indecenti e dai riferimenti polemici al clero. Pur così castigata, e perciò criticata, questa silloge è frutto di un’iniziativa coraggiosa, intrapresa quando Porta Pia era ancora intatta. L’anno della breccia, 1870, uscì l’antologia di Duecento sonetti che Luigi Morandi attinse in parte dalla stampa purgata, in parte dalla «tradizione popolare»: nonostante questi limiti, l’antologia pubblicata da un editore di importanza nazionale, il Barbèra di Firenze, diede un sensibile impulso alla conoscenza di Belli oltre i sette colli. La prima edizione complessiva e fondata sugli autografi uscì tra il 1886 e il 1889 per le cure dello stesso Morandi, che aggiunse note integrative a quelle dell’autore: vi riunì i 2143 sonetti allora noti – altri 123 saranno rintracciati poi – e li dispose in ordine cronologico, con la rilevante eccezione dei sonetti osceni, estrapolati e riuniti in tomo a sé, che divenne un vero bestseller. Una svolta decisiva nella tradizione a stampa dei Sonetti si ha nel 1952 con l’edizione di Giorgio Vigolo, corredata di un’attenta annotazione che, per i sonetti più congeniali al criticopoeta, si dilata in suggestivi commenti. Egli riporta i 2279 sonetti secondo la lezione degli autografi, fatta salva l’uniformazione dell’oscillante grafia diacritica del poeta; li dispone in ordine cronologico, con la rilevante eccezione della lunga collana sul colera, Er còllera mòribbus, posta a chiusura della raccolta, come fosse un poemetto autonomo. Importanti acquisti per chiarire la genesi e l’elaborazione dei Sonetti si hanno con la pubblicazione degli appunti preparatori e delle varie stesure dell’Introduzione belliana (Roberto Vighi, Belli romanesco, 1966) e delle correzioni d’autore (Pietro Gibellini, Le varianti autografe dei sonetti romaneschi, 1973). Con la monumentale Edizione nazionale (Poesie romanesche, 1988-93), Vighi arricchisce la raccolta di un massiccio corredo esegetico; sul piano strutturale segue a grandi linee l’ordine cronologico, accostando però liberamente sonetti di tema affine ma di data diversa. Ora, in questa nuova edizione critica, a cura di Pietro Gibellini, Lucio Felici e Edoardo Ripari, i 2279 sonetti di sicura paternità belliana sono riccamente annotati e commentati. La lezione è fedele agli autografi anche nella grafia, e l’ordine dei testi ripristina la sequenza cronologica, più o meno alterata da tutte le edizioni precedenti. L’apparato filologico che la completa comprende la lista delle correzioni d’autore, i sonetti incompiuti e le poesie romanesche in altro metro
Age-related changes of glutamate dehydrogenase in the rat hippocampus: an enzyme histochemical study.
No full textEnzyme histochemical techniques associated with microphotometry were used to evaluate the reactivity of glutamate dehydrogenase (GDH) in the hippocampus of young (3 month) adult (12 month) and old (26 month) male Sprague-Dawley rats. In young rats the highest level of enzymatic reactivity was found in the stratum oriens of the CA-1-CA-4 fields followed in descending order by the molecular layer of fascia dentata, and by the layer of mossy fibers. In all the layers investigated GDH reactivity was higher in adult that in young rats. The older animals exhibited lower GDH reactivity than adult rats in almost all of the layers and higher enzymatic reactivity than in young rats in the stratum oriens of the CA-1-CA-4 fields. The hippocampus is known to be involved in the acquisition of two-way avoidance learning and is thought to utilize glutamate as one of its main neurotransmitters. These data suggest a possible relationship between hippocampal glutamatergic transmission and impairment of acquisition of avoidance learning occurring with age. Moreover, the possibility that a decreased glutamate catabolism occurring in old rats may contribute to the neuronal loss described in the hippocampus of aged rats is discussed
Effect of ipsilateral lesioning of the nucleus basalis magnocellularis and of L-alpha-glyceryl phosphorylcholine treatment on choline acetyltransferase and acetylcholinesterase in the rat fronto-parietal cortex.
No full textThe present study assesses the effect of unilateral lesions of the nucleus basalis magnocellularis (NBM) and of treatment with L-alpha-glyceryl phosphorylcholine (GFC, choline alfoscerate) on the acetylcholine-synthesizing (choline acetyltransferase (ChAT)), and acetylcholine-degradating (acetylcholinesterase (AChE)) enzymes in the rat fronto-parietal cortex ipsilateral to the lesion. Ibotenic acid injections in the right NBM area caused a significant decrease of both ChAT and AChE activities as well as of histochemically reactive stores of AChE in the right fronto-parietal cortex. Treatment with GFC restored in part the loss of ChAT and AChE activities. Moreover, AChE reactivity is restored in the fronto-parietal cortex of NBM-lesioned rats treated with GFC. GFC is a precursor in the biosynthesis of brain phospholipids which increases the bioavailability of acetylcholine in the nervous tissue. The possible relevance of the restoration of the marker enzymes of cholinergic neurotransmission by GFC in an animal model of cholinergic hypofunction is considered
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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