1,721,001 research outputs found
Decline of pesticide residues in artichoke (Cynara scolymus L.): Influence of globe covering on the harvesting time
No full textA study was carried out on pesticide residues in artichokes treated with Pirimicarb, Chlorpyriphos-methyl, Penconazole and Fenarimol, representing the mostly used pesticides in the protection of this crop. The treatment was performed after covering with plastic films about 50% globes at different ripening stages. The residues detected 24 hours after treatment were lower than 0.05 mg/kg for the covered globes, whereas ranged from 0.32 to 2.70 mg/kg for the uncovered ones. The residues found in the covered samples were probably due to the migration of the active ingredients from the leaves to the globes. As far as the uncovered globes are concerned, residues were barely lower than the legal limits at the end of the pre-harvest interval. Covering of the globes does not compromise the product safety and allows the harvest from the first day after the treatment
Decline of pesticide residues in artichoke (Cynara Scolymus L.): influence of globe covering on the harvesting time
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I componenti polifenolici del vino. Nota II: gli antociani in relazione a differenti sistemi di vinificazione.
No full textDifferent effects of polycyclic aromatic hydrocarbons in artificial and in environmental mixture on the free living nematode C.elegans
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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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