1,721,041 research outputs found
Sporulation and respiratory metabolism in the «petite negative» yeast Hansenula saturnus
No full textUpon transition from growth medium to acetate sporulation medium buffered at pH 6.1 with 0.2 M PIPES, Hansenula saturnus showed a respiratory activity which was 88% antimycin A sensitive (1st) and 12% high azide sensitive (3rd), as in acetate complete growth medium. After cong 10 h, 3rd respiration declined and oxygen consumption was inhibited by the simultaneous addition of antimycin A and hydroxamate, a situation which lasted until the appearance of the first asci. Later on, 1st and 3rd respiration reappeared and asci formation was completed under these respiratory conditions. The growth in the presence of antimycin A or erythromycin affected only quantitatively the ascospore production and this is because in sporulation medium there was a de novo synthesis of the mitochondrial components of the respiratory chain. Cells which were avoid of 1st respiration but possessed 2nd or 3rd respiration could sporulate, indicating that these alternative respirations also have a role in the process. This was confirmed by the inhibition of sporulation as occurred in the presence of inhibitors of 1st, 2nd and 3rd respiration in sporulation medium
Rassegna Europea
No full textIl saggio ricostruisce l'evoluzione, i contenuti e l'influenza di "Rassegna Europea", principale rivista europeista attiva a Trieste e in Friuli negli anni '50 e '60 del Novecento
Klaac null mutant in Kluyveromycs lactis is complemented by a single copy of Saccharomyces cerevisiae gene AAC1
No full textDalla metafisica alla teologia
No full textSuperati i pregiudizi storici e le reciproche chiusure, da alcuni decenni oramai filosofi e teologi insieme si ritrovano per uno scambio di prospettive ed un ascolto reciproco circa le domande fondamentali dell'uomo, nel tentativo di pensare meglio le sfide del mondo contemporaneo. L'impegno che si esige in maniera sempre più urgente è il superamento di posizioni ideologizzate per lasciarsi contaminare reciprocamente. Da discipline del pensiero, con i propri contenuti e metodi, filosofia e teologia si offrono come percorsi efficaci per ripensare l'esperienza dell'uomo e del credente in particolare. In questa prospettiva, e all'interno della formazione teologica, filosofia e teologia sono sollecitate non soltanto a parlarsi, ma anche ad ascoltarsi. È proprio l'ardire del pensare che dà alla teologia un contatto attivo con la fede, mentre la fede può dare, e ha dato, come è documentabile storicamente, tanti spunti originali al pensare. In questo reciproco ascoltarsi e parlarsi, filosofia e teologia non perdono il loro fecondo riferimento al mistero, alla sapienza, alla trascendenza. Ciò le dispone al dialogo, a rimeditare la costitutiva eccedenza che abita il loro argomentare
Going Beyond Counting First Authors in Author Co-citation Analysis
Get PDFThe 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
Get PDF“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
Get PDFWe 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
Heterologous complementation of Klaac null mutation of Kluyveromyces lactis by Saccharomyces cerevisiae AAC3 gene
No full textA Klaac null mutant of Kluyveromyces lactis is complemented by a single copy of the Saccharomyces cerevisiae AAC1 gene
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