1,720,967 research outputs found
Molecular characterization and comparative analysis of six durum wheat accessions including Graziella Ra
No full textGenetic identity and relatedness of the durum
wheat Graziella Ra, four Italian commercial durum cultivars
(Cappelli, Grazia, Flaminio and Svevo) and Kamut
were evaluated using amplified fragment length polymorphisms
(AFLPs), simple sequence repeats (SSRs) and α-
gliadin gene sequence analysis. Our primary objective was
to study molecular genetic diversity in such a set of wheats
including three modern (Grazia, Flaminio and Svevo) and
three older (Cappelli, Kamut and Graziella Ra) durum
accessions. Specifically, we aimed at determining the
relationship between the historic accession Graziella Ra
and Kamut, which is considered an ancient relative of the
durum subspecies. Obtained results revealed that (1) both
AFLP and SSR molecular markers detected highly congruent
patterns of genetic diversity among the accessions showing
nearly similar efficiency; (2) for AFLPs, percentage of
polymorphic loci within accession ranged from 6.57% to
19.71% (mean, 12.77%) and for SSRs, from 0% to 57.14%
(mean, 28.57%); (3) principal component analysis of genetic
distance among accessions showed the first two axes
accounting for 58.03% (for AFLPs) and 61.60% (for SSRs)
of the total variability; (4) for AFLPs, molecular variance was
partitioned into 80% (variance among accessions) and 20%
(within accession) and for SSRs, into 73% (variance
among accessions) and 27% (within accession); (5)
cluster analysis of AFLPs and SSRs datasets displayed
Graziella Ra and Kamut constantly grouped into the
same cluster; and (6) molecular comparison of α-gliadin
gene sequences showed Graziella Ra and Kamut in
separate clusters. All these findings support the hypothesis
that Graziella Ra and Kamut, although very similar,
at least in the little part of the genome investigated by
molecular markers employed in this study, might be
considered as distinct accessions
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
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
Sorting of cells from different cell cycle phases using surface antigen expression
No full textDetailed procedures are presented for obtaining highly enriched human Daudi cell population in different cell cycle phases. This protocol allows harvest of enriched G1 or S-G2 phase cells based on the recognition of a cell surface marker antigen by anti-CD11a antibody and sorting. Sorted cells are able to cycle and a wave of synchronisation appears. Relative advantages of the method over chemically induced cell synchronisation are discussed
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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