1,721,145 research outputs found
Simulation of natural convection flows in enclosures by an unstaggered grid finite volume algorithm
No full textIdentification and preliminary characterization of a Ca2+-dependent hemagglutinin in the coelomic fluid of Sipunculus nudus.
Full text linkA soluble agglutinin was purified by affinity chromatography of the celomic fluid of the marine worm Sipunculus nudus. This agglutinin requires metal cations for its activity and is specific for derivatives of D-galactose. It resulted lightly thermostable, with a pH optimum around 7.5. On SDS-PAGE, it was resolved in two bands, of 33 and 31 kDa in reducing conditions and 29 and 26 kDa in non-reducing conditions. This behavior is probably due to the presence of disulfide bridges between cysteine residues, which are required for the correct functioning of the hemagglutinin, as β-mercaptoethanol completely abolish the agglutinating activity of cell-free celomic fluid. The purified lectin can influence in vitro phagocytosis of yeast by celomic leukocytes: in the presence of the molecule, ingestion of foreign particles results significantly decreased and yeast cells agglutinate and forms rosettes around the celomocytes. This suggests a role of the molecule in immunosurveillance
Rappresentazione dei mercati locali del lavoro: il sistema di indicatori DOMUS
No full textPer un laureato o un diplomato universitario “presentarsi sul mercato” significa svolgere un’azione di trasparente disponibilità a ricoprire un ruolo professionale. I mercati a cui il laureato può riferirsi sono qualificati sulla base della dimensione territoriale, da quelli attorno a casa, a quelli regionali, e via via fino a quelli nazionali ed internazionali, ma possono essere stratificati anche sulla base delle competenze richieste, sulla base del rischio economico che il laureato è disposto ad assumersi e sulla base di altre variabili ancora. In questo lavoro, tra le tante categorie di mercati del lavoro, si considerano esclusivamente quelli locali. Mercati locali, o sistemi locali, del lavoro sono gli ambiti territoriali minimi entro i quali si connettono la domanda e l’offerta di lavoro
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
Heavy metals in different organs of a bivalve mollusc (Cerastoderma glaucum) exposed to nickel.
No full textVariations 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
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