1,721,115 research outputs found
Gamma-linolenic acid and tocopherol contents in the seed oil of 47 accessions from several Ribes species
No full textGamma-linolenic acid is an essential fatty acid for humans with delta-6-desaturase deficiency; it is a precursor of prostaglandins, prostacyclins, and tromboxanes; and it has antiinflammatory and antitumoral effects;. Tocopherols are natural antioxidants with biological activity, heart/vascular, and cancer protective properties. The oil, gamma-linolenic acid, and tocopherol contents, as well as tocopherol composition, were investigated in the seed oil of a collection of 47 accessions belonging to various species of the genus Ribes. Differences for oil content among species were not significant. The highest total tocopherol content was found in R. nigrum (mean, 1716 mg kg(-1) oil), followed by R. rubrum (mean, 1442 mg kg(-1) oil). R. grossularia showed the lowest Values for this trait (mean, 786 mg kg(-1) oil). The three species also differed strongly for tocopherol composition. R. rubrum was distinguished by a higher concentration of delta-tocopherol (mean, 20.2%); R, grossularia displayed the highest percentage of gamma-tocopherol (mean, 70.0%), and R. nigrum showed the highest concentration for alpha-tocopherol (mean, 34.8%), the most biologically active among the four tocopherols. Regarding gamma-linolenic acid, the highest content was found in R. nigrum, which exhibited up to 15.8% of this essential fatty acid in the oil. R. grossularia and R. rubrum showed mean gamma-linolenic acid contents of 8% and 6.2%, respectively. The present study indicated that seeds of Ribes species, especially R. nigrum, could be used as sources of gammalinolenic acid and natural vitamin E
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
Politica del vivente
No full textIl saggio intende esplicitare il modo in cui il problema della biopolitica diventa inscrivbile in quello più ampio dell'immutabile sfondo biologico contro cui si dispiegherebbe la variabilità delle vicende storiche. lo scopo è scadinare il paradigma per mostrare come la nozione di biopolitica implica un intreccio tra biologico e politico, che non può essere ridotto ai soli termini dell'antropologia moderna, se è vero che la costituzione biologica dell'uomo è diventata la posta in gioco del dispositivo di sapere-potere dominante nel mondo contemporaneo
Stupratori, cannibali e scienziati
No full textIl saggio attacca la nuova "scienza" della natura umana, autorevolmente propagandata da Steven Pilker, su tre punti: la base evidenziale, la scelta degli universali naturali (lo stupro ma non il cannibalismo) e la capacità di spiegare cose chesembrano travalicare la nostra dotazione evolutiva, e argomenta che essa è insoddisfacente in ognuno di essi
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
Introduzione
No full textIntroduzione al volume "Indagine sulla natura umana. Itinerari della filosofia contemporanea", Carocci, Roma, 2011
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
Bioetica e diritto (cap. 4); Genetica, genomica e diritto (cap. 7); Diritto e diritti degli animali (cap. 10); La prospettiva biogiuridica su ambiente e organismi geneticamente modificati (Cap. 13)
No full textI saggi esplorano i profili bioetico- giuridici legati alluso delle biotecnologie genetiche, in ambito medico, animale e ambiental
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