1,720,961 research outputs found
Molecular markers for cultivar characterisation in olea Olea europaea L.. Acta Hort. n. 586, vol I, 97-100, 2002
No full textIntra-varietal analysis of Olea europaea L. cultivars using morphological, biochemical and molecular markers
No full textClassification of olive germoplasm results very complex due to the cv genetic variability, to the lack of reference standards and genome characterisation, and, moreover, in the confusion of names attributed to the cultivars resulting in numerous synonyms and homonyms. An example is represented by the cv Moraiolo with about 90 synonymies and often with marked agro-morphological differences; on the contrary, other cultivars, as Leccino, seem to be more conserved, since the cv-populations show little morphological differences. The present work was carried out with the aim to identify the genetic similarity among 25 accessions of the Leccino cultivar collected in their origin zone (Pistoia province) and in the adjacent ones (Florence, Pisa, Leghorn and Grosseto). Biometric indexes of tree, leaf, fruit and stone were compared with the electrophoretic data obtained using RAPDs and total proteins extracted from seed teguments. Morphological and biochemicalmolecular data showed similar relationships into the cultivar
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
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
Molecular markers for cultivar characterisation in olea Olea europaea L.
No full textAccurate identification of olive cultivars is an essential requirement for the oliveculture. Distribution of incorrectly labelled Olea europaea and the global spread of vegetative propagated cuttings over hundreds of years sometimes changed the names of the same cultivar growing in different regions. Development of cultivar specific markers is necessary for cultivars identification and protection and cultivar purity determination. Standard DNA marker types and universal database integrated with exiting agro-morphological identification could have a significant impact on the exact cultivar identification of olive plants. The putative synonymous Olea europaea cultivars Arancino, Carboncella, Corniolo, Moraiolo and Tondello have been characterised by different molecular methodologies. Cucca is another cultivar used for comparison. Analyses for olive cultivar identification were carried out through PCR amplification, restriction and cloning of spacers sequences of the nuclear ribosomal gene. The internal transcribed spacers region (ITS1, 5.8S and ITS2), was amplified by the polymerase chain reaction (PCR) by using two primers complementary to the 3’ region of 18S and 5’ region of 25S rDNA. The PCR product amplified from Moraiolo cultivar appears as a single band of approximately 700 bp in size: it was cloned using the pCR 2.1 vector. The ITS1 (about 250 bp), ITS2 (about 200 bp) and 5.8S rRNA gene were completely sequenced. No amplified length polymorphism was found among the analysed cultivars. The nuclear ribosomal intergenic spacer (IGS) and the flanking 5’ external transcribed spacer were amplified by using primers matching 3’ region of 25S and 5’ region of 18S. A partial sequence from Arancino cultivar was obtained. Amplicon restriction analyses were used to evaluate the genetic diversity among cultivars: no differential polymorphism was detected among them
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
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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