1,720,993 research outputs found
Long Term Effects of Ericoid Endomycorrhizae on the Growth of Micropropagated Plants of Vaccinium corymbosum L. in the Field.
No full textPrevious studies on mycorrhization procedures and the effect of inoculation of 10 selected mycorrhizal fungi (Hymenoscyphus ericae, two isolates of Oidiodendron maius, 6 sterile non-classified mycelia isolated in Italy on Calluna spp., and one sterile mycelium isolated on Vaccinium spp. in France) on rooting and growth of micropropagated plants of 9 cultivars of Vaccinium corymbosum, had shown that the growth and habit of plants and their root development depended on the interaction between the fungus strain and the cultivar. The effect of the interaction between cultivar and fungus strain was maintained, in the first years of field growth, on the size of plants, on the number and length of shoots, and also on the number and length of basal shoots. In the present contribution, the results of eight years of cultivation of the same plants in three different fields are reported. The performance of mycorrhized plants in different soils and environments is compared for plant growth and development. The long term interaction of fungal strain and blueberry cultivar was confirmed: some of the strains that increased the growth of a cultivar were ineffective or even decreased the growth of another one. Moreover, within cultivar, differences in plant growth among fields showed a significant interaction between fungal strain and environmental and soil conditions
The Influence of Ericoid Endomycorrhizae and Mineral Nutrition on the Growth of Micropropagated Plants of Vaccinium corymbosum L.
No full textIn vitro propagation is widely recognized as an excellent way to produce a lot of plants in a short time. Micropropagated plants show a better field performance than those obtained by traditional cuttings: bushier growth habit, increased vigour and number of branches and flowering buds, and higher early yields. As the wild highbush blueberries have symbiotic relationship with endomycorrhizae of Ascomycetes such as those of the genus Hymenoscyphus and Oidiodendron, previous studies on the best mycorrhization procedure and on the effect of inoculation of selected mycorrhizal fungi combined with fertilization on rooting and growth of micropropagated plants of Vaccinium corymbosum were carried out on 9 blueberry cvs with 11 types of mycorrhizae. A remarkable interaction between the fungus strain and the blueberry cultivar were found both on the growth and habit of plants and on root development. The effect of mineral nutrition depended both on blueberry cultivar and on mycorrhizal strain. In the present research, the results of four years of cultivation in the soil of the same plants are reported. The effect of the interaction between cultivar and fungus strain is still remarkable on the size of plants, on the number and length of shoots, and also on the number and length of basal suckers. As for nutrition, the trials confirm the positive role of P on the growth of plants, and the multiple interaction between cultivar, fungus and fertilizer
The Influence of Ericoid Endomycorrhizae and Mineral Nutrition on the Growth of Micropropagated Plants of Vaccinium corymbosum L. 8th international Symposium on Vaccinium Culture, Oeiras, Portugal, and Seville, Spain, 3-9 May, 2004.
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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
Dispelling the Myths Behind First-author Citation Counts
Full text linkWe 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
koamabayili/VECTRON-author-checklist: VECTRON author checklist
No full textWe have done our best to complete the author checklist relating to the use of animals in the hut study. Note that the objective for the hut study was to evaluate the IRS treatment applications for residual efficacy against Anopheles mosquitoes, including the local An. coluzzii mosquito population. Cows were only used to attract mosquitoes into the huts and no tests were carried out directly on the cows. The author checklist is intended for use with studies where experiments are carried out on animals, which is why we have had such difficulty in completing this for the hut study, as many of the questions do not relate to how the cows were used
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