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Застосування негуміфікованої органічної речовини як засіб регулювання алелопатичного режиму
Get PDFThe effect of unhumificated organic substance of radish and mustard on allelopathic soil regime after long-term lilac cultivation and physiological state of seedlings was studied. Application of unhumificated organic substance reduced soil phytotoxicity and raised adaptability of lilac plants in soil sickness conditions
Оцінка ефективності використання нових культур для стабілізації системи ґрунт–рослина за умов алелопатичної післядії
No full textEffect of organic matter of new crops as green-manure on physiological and biochemical properties of soil-plant system under lilac (Syringa vulgaris L.) allelopathic post-action was studied. Lilac seedlings were grown for 17 months under greenhouse conditions in pots with grey forest soil collected after long-term lilac cultivation. Green-manure as biomass of Raphanus sativus var. oliefera L., Sinapis alba L., Sida hermaphrodita Rusby., Rumex patientia L. × R. tianschanicus A. Los. was applied at 5 % to soil weight. The soil without green-manure was used as control. Decrease in free phenolic substances concentration and simultaneous increase in oxidation-reduction potential, humus and free amino acids contents in soil during decay of the new crops biomass were observed. Application of the green-manure reduced soil phytotoxicity, which led to increase in the lilac seedlings growth. Decay products of organic residues of the new crops promoted accumulation of photosynthetic pigments – chlorophylls (chlorophyll b mainly) and carotenoids in leaves, which raised adaptability of the seedlings to lilac allelopathic post-action. Efficacy of use as the greenmanure of Raphanus sativus var. oliefera and Sinapis alba was higher as compared with Rumex patientia × R. tianschanicus and, especially, Sida hermaphrodita
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
Алелопатичний підхід до оптимізації біохімічного стану ґрунтового середовища
Get PDFEffect of unhumificated organic substance of Brassica rapa var. oleifera on biochemical state of soil environment after long-term lilac cultivation was studied. Application of unhumificated organic substance promoted intensification of humification processes, raised biological soil activity and reduced the soil phytotoxicity
Фізіологічні та біохімічні параметри системи ґрунт–рослина за умов алелопатичного стресу: діагностичний аналіз та керування
No full textThe diagnostic analysis of functional state of the soil-plant system under allelopathic stress has been carried out for its optimization. For this purpose, it has been used a number of physiological and biochemical parameters. The influence of winter rape biomass (Brassica campestris L. f. biennis D.C.) as green manure on allelopathic, biochemical and physiological properties of the soil-plant system on an example of perennial plantings of lilac cultivars (Syringa vulgaris L.) of the M.M. Gryshko National Botanical Garden of the NAS of Ukraine collection was studied. Green biomass of winter rape during flowering stage was added into grey forest soil at 3.5 kg/m2 on mentioned areas of the arboretum. It was established that the application of winter rape biomass as green manure significantly improved the functional state of the soil-plant system under long-term cultivation of lilac plants. Structural components of the soil-plant system stabilized under the influence of green manure biomass decay products, which positively affected both allelopathic and biochemical soil properties and the physiological state of the lilac plants. There have been qualitative dynamic changes in soil-plant system for the green manure action, which manifested stimulation of growth processes, intensification of humification (by the phenolic acids pool), improving the redox regime, restructuring of component composition of photosynthetic pigments, and eventually increase in adaptive ability of lilac plants. As this trend persisted not only for the direct action of this factor, but also in its after-effect (next growing season after application of green manure biomass) can recommend the use of winter rape as green manure for optimization of soil-plant system under allelopathic stress
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
Dispelling the Myths Behind First-author Citation Counts
Get PDFWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
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