1,720,963 research outputs found
Enzimi coinvolti nell'assimilazione dello azoto in plantule di grano duro (Triticum durum Desf. cv Simeto)
No full textINHIBITION BY GLUFOSINATE OF GLUTAMINE SYNTETHASE OF CULTURED CELLS OF CARROT (DAUCUS CAROTA, L.): EFFECT OF GLUTAMATE.,
No full textGlutamine synthetase in cells from carrot (Daucus carota L): Interaction between phosphinothricin and glutamate
No full textStudio preliminare dell'effetto delle sostanze umiche sulla radicazione di espianti fogliari di Nicotiana plumbaginifolia e sull'efficienza di piastramento di cellule di Daucus carota α II
No full textCompost and vermicompost in cucumber rhizosphere promote plant growth and prevent the entry of anthropogenic organic pollutants
Full text linkAn accurate assessment of the absorption and accumulation of soil pollutants by plants is essential to avoid the entry of toxic compounds into the human and animal food chain. Therefore, this study evaluated the effectiveness of the amendment of a loamy soil with a mixed compost (CP) and a vermicompost (VC) from digestate, at doses of 10 t ha−1 (CPL and VCL) and 30 t ha−1 (CPH and VCH), in sustaining the growth of cucumber (Cucumis sativus L.) plants and reducing the uptake of contaminats, such as the fungicide metalaxyl-M (MET-M) and the endocrine disruptors bisphenol A (BPA), 4-tert-octylphenol (OP) and nonylphenol (NP). Plant response to soil amendment with CP and VC was tested in parallel in both contaminated and uncontaminated soil. All treatments significantly promoted cucumber growth in both soil conditions. After 38 days of cucumber growth in contaminated soil, CPL, CPH, VCL and VCH increased dry biomass of roots and shoots by 42, 128, 118, 147%, and 46, 113, 271, 443%, respectively, compared to unamended soil (control). Root and shoot elongation and the number of leaves and their expansion were also significantly promoted by the application of CP and VC at both doses. All treatments, in the order: VCH > VCL > CPH > CPL, considerably reduced the absorption of all compounds by cucumber. Although small quantities of residues of each pollutant were found both in the roots and in the aerial organs of all plants, their overall accumulation in plants grown in amended soil was significantly lower than that found in the control plants. Thus, on the basis of the results obtained, it is evident that the use of CP and VC can be very effective and sustainable both from an economic and environmental point of view, since, in addition to stimulate plant growth, it can represent a successful strategy to mitigate the presence of toxic residues in food plants
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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