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La prima traduzione di Teognide: sull’interlineare latina del Par. Suppl. Gr. 388
No full textThe ms. Par. Suppl. Gr. 388 contains, to date, the oldest medieval Latin translations of Greek poetic texts, written in line spacing, probably by Moses of Bergamo. This paper provides an edition of the Theognidean translation (vv. 1-256, 269-74, 1231-36), along with an overall evaluation, in order
to frame the modus operandi of the translator, who is also capable of working ope ingenii on the Theognidean text with some appreciable interventions
Characterization of the ATP-G-actin aggregates fomed at low KCl concentration
Full text linkThe ATP-G-actin aggregates formed by incubation of ATP-G-actin in 7.5 mM-KCl were characterized by electron-microscopical observation, by high-pressure liquid chromatography and by the study of the 1,N6-etheno-ATP-ATP exchange reaction between the free and the actin-bound nucleotide. In 30 mM-KCl the initial rate of the reduced-viscosity increase is found to be directly related to the amount of the aggregates formed in the course of the preincubation in 7.5 mM-KCl
IL QUADRO ANTOMO-PATOLOGICO DELL'ARTERITE GIGANTOCELLULARE
No full textRassegna sugli aspetti istopatologici e patoheìgenetici dell'arterite giganto-cellulare corredata da casistica personal
Increased sinusoidal wall permeability and liver fatty change after two-thirds hepatectomy: An ultrastructural study in the rat
No full textAccumulation of lipids in the hepatocyte cytoplasm after partial hepatectomy (PH) has long been recognized, but the mechanism behind this phenomenon is still poorly understood. In this study, rats subjected to a standard two-thirds PH showed early and marked increase in portal venous pressure (P <.01). On scanning electron microscopy, the regenerating liver fixed by portal perfusion under hemodynamic conditions identical to that found in vivo during the first 24 hours showed a significant (P <.01) 10-fold increase in the sinusoidal wall porosity (percentage open area by fenestrations). This was paralleled by the disappearance of the sieve-plate arrangement of small fenestrations and by a significant decrease in the number of fenestrations per micrometers squared of sinusoidal surface at 6 (P <.01) and 12 hours (P <.05). In addition, there were major changes in the frequency and distribution of all three classes of fenestrations. At 6 and 12 hours, there was a marked decrease of small class 1 fenestrations and a marked increase of intermediate class 2 fenestrations and large class 3 fenestrations (P <.0001). A concurrent accumulation of lipid droplets in the hepatocyte cytoplasm produced a 20-fold increase in the hepatocyte total lipid volume. A statistically significant linear correlation (r = 0.907; P <.01) was found between the amount of intracellular lipids and the data quantitating the changes in porosity of liver sinusoids at 24 hours. It is concluded that an increased sinusoidal wall permeability to lipids may be the primum movens in the pathogenesis of transient liver fatty change after PH in the rat. © 1995
Haemodynamic and ultrastructural observations on the rat liver after two-thirds partial hepatectomy*
No full textRat liver ultrastructure was investigated after partial hepatectomy (PH), by scanning and transmission electron microscopy. Portal pressure was monitored before and after PH and, after killing performed at 6, 12, 24, 48 h and 10 d, regenerating livers were fixed by portal vein perfusion under haemodynamic conditions identical to those existing in vivo. An early and persistent increase in portal pressure after PH was found (P < 0.01 for normal vs sham-operated controls). Ultrastructural study showed sinusoid dilatation and disappearance of the sieve-plate arrangement of small endothelial pores, thus leaving the parenchymal liver cell surface directly exposed to portal blood. Widening of sinusoids, endothelial fenestrations, intercellular spaces and spaces of Disse, was accompanied by dilatation of bile canaliculi. At 10 d, liver ultrastructure had returned to normal. Our observations suggest that a rise in portal pressure, as a consequence of PH, may be related to the observed ultrastructural changes in the liver
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
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