1,721,007 research outputs found
Photoinduction of anthocyanin in maize: a genetic approach
No full textThe pathway of anthocyanin biosynthesis is well known while its regulation is less characterized. In this paper we focus our attention on the process of anthocyanin photoinduction. The results obtained following irradiation of seedling root tissues with lights of different quality disclose a significant response to blue light, apparently not attributable to phytochrome action. Even when anthocyanin accumulation is significantly increased because of the presence of Pl, a pigment intensifier, the total phytochrome content is not affected. The blue light effect is general in the sense that is observed in all genetic backgrounds tested. Photoinduction of anthocyanin accumulation in viviparous mutants blocked in carotenogenesis depends on blue light indicating that carotenoids are not involved in the blue response. Studies with calcium-channel blockers and calcium antagonists seem to exclude a requirement of Ca++ as an intermediary component of the light transduction pathway
Le istituzioni civili e religiose a Chiusi (secoli VI-XI)
No full textLa città di Chiusi tornava ad assumere un ruolo importante nei primi secoli medievali proprio grazie alle funzioni istituzionali che le venivano attribuite dai longobardi, con l'unico ducato della Tuscia meridionale, e dall'organizzazione territoriale ecclesiastica, con un episcopato in stretta relazione con Roma per l'organizzazione territoriale anche al di là dei propri confini
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
Della Fina (Giuseppe M.). Le antichità a Chiusi. Un caso di «arredo urbano»
No full textMoretus Jean. Della Fina (Giuseppe M.). Le antichità a Chiusi. Un caso di «arredo urbano». In: Revue belge de philologie et d'histoire, tome 63, fasc. 1, 1985. Antiquité — Oudheid. pp. 171-176
G. Pucci and C. Mascione (Eds), Manifattura ceramica etrusco-romana a Chiusi: il complesso produttivo di Marcianella (Bibliotheca Archaeologica 10).
No full textBook review of G. Pucci and C. Mascione (Eds), Manifattura ceramica etrusco-romana a Chiusi: il complesso produttivo di Marcianell
Giuseppe M. Della Fina, Le Antichità a Chiusi. Un caso di « arredo urbano », 1983. (Archaeologica, 31)
No full textEtienne Robert. Giuseppe M. Della Fina, Le Antichità a Chiusi. Un caso di « arredo urbano », 1983. (Archaeologica, 31). In: Revue des Études Anciennes. Tome 87, 1985, n°3-4. p. 401
Della Fina (Giuseppe M.). Le antichità a Chiusi. Un caso di «arredo urbano»
No full textMoretus Jean. Della Fina (Giuseppe M.). Le antichità a Chiusi. Un caso di «arredo urbano». In: Revue belge de philologie et d'histoire, tome 63, fasc. 1, 1985. Antiquité — Oudheid. pp. 171-176
- …
