1,720,963 research outputs found
Nutritional and Physiological Effects of Postharvest UV Radiation on Vegetables: A Review
No full textImprovement of cocktail tomato yield and consumer‐oriented quality traits by potassium fertilization is driven by the cultivar
No full textThe effect of potassium fertilization on the metabolite profile of tomato fruit (Solanum lycopersicum L.)
No full textEffect of potassium fertilization on the contents of antioxidants in three cocktail tomato cultivars
Full text linkTomatoes are an important source of health beneficial phytochemicals, which act as antioxidants such as ascorbic acid, phenolic compounds, carotenoids, and tocopherols. The content of antioxidants is influenced, among others, by abiotic stress factors, like the nutritional status. Potassium (K) is a macronutrient, which is essential for several physiological functions in plants, for example, translocation of assimilates, activation of enzymes, maintenance of turgescence, and stomata regulation. The aim of this study was to investigate the effect of increasing K fertilization on the concentration of antioxidants in cocktail tomatoes. Therefore, three tomato cultivars (Primavera, Resi, and Yellow Submarine), grown in an outdoor pot experiment, were fertilized with increasing K doses for two consecutive years. It was confirmed that antioxidants in tomato fruit can be affected by the K regime, but was also shown that other factors may reduce or even inverse those effects when cultivation takes place in an uncontrolled outdoor environment. Most consistent K fertilization effects were found for naringenin, p-coumaric acid and caffeic acid. However, enrichment of tomatoes with antioxidants by K fertilization is cultivar dependent and, therefore, general statements should be avoided
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
Cardiovascular health‐related quality of life in cancer: a prospective study comparing the ESC HeartQoL and EORTC QLQ‐C30 questionnaire
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