1,720,982 research outputs found
FIGURE 3 in MIDTAL (Microarrays for the Detection of Toxic Algae)
No full textFIGURE 3: Hybridization of fragmented RNA to 16 probes (x axis) on the microarray with increasing hybridisation temperature as compared to non fragmented RNA hybridised at 37°C. Probes with low signals are enhanced by fragmentation. The signal to noise ratio values above the background cut-off of 1 are shown.Published as part of Medlin, Linda K., Montresor, Marina, Graneli, Edna, Reugera, Beatrix, Raine, Robin, Edvardsen, Bente, Lewis, Jane, Elliott, Chris, Pazos, Yolanda & Maranda, Lucie, 2013, MIDTAL (Microarrays for the Detection of Toxic Algae), pp. 201-210 in Phytotaxa 127 (1) on page 206, DOI: 10.11646/phytotaxa.127.1.19, http://zenodo.org/record/508541
FIGURE 5 in MIDTAL (Microarrays for the Detection of Toxic Algae)
No full textFIGURE 5: Comparison of RNA yields extracted from three filters of field material collected at eight stations in the Irish Sea at Galway, Ireland by PTR 5 NUIG with (av spiked = red) and without (av crudeblue = blue) the addition of cells of Dunaliella as the internal control prior to the extraction.Published as part of Medlin, Linda K., Montresor, Marina, Graneli, Edna, Reugera, Beatrix, Raine, Robin, Edvardsen, Bente, Lewis, Jane, Elliott, Chris, Pazos, Yolanda & Maranda, Lucie, 2013, MIDTAL (Microarrays for the Detection of Toxic Algae), pp. 201-210 in Phytotaxa 127 (1) on page 207, DOI: 10.11646/phytotaxa.127.1.19, http://zenodo.org/record/508541
FIGURE 4 in MIDTAL (Microarrays for the Detection of Toxic Algae)
No full textFIGURE 4: Average RNA amounts (pg/cell) over a three-day period for three different strains of Prymnesium parvum N. Carter (1937: 40) cultures grown under three levels of four environmental stressors: light (top left), nutrients (top right), salinity (bottom left) and temperature (bottom right). In each treatment, the optimal value for the growth of P. parvum is shown in red and the stress conditions tested are in blue and green.Published as part of Medlin, Linda K., Montresor, Marina, Graneli, Edna, Reugera, Beatrix, Raine, Robin, Edvardsen, Bente, Lewis, Jane, Elliott, Chris, Pazos, Yolanda & Maranda, Lucie, 2013, MIDTAL (Microarrays for the Detection of Toxic Algae), pp. 201-210 in Phytotaxa 127 (1) on page 207, DOI: 10.11646/phytotaxa.127.1.19, http://zenodo.org/record/508541
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
Increase in the production of allelopathic substances by Prymnesium parvum cells grown under N- or P-deficient conditions
No full textThe haptophyte Prymnesium parvum is known to produce a set of highly potent exotoxins, commonly called prymnesins. These toxins have been shown to have several biological activities, including ichthyotoxic, neurotoxic, cytotoxic, hepatotoxic and hemolytic activity towards a range of marine organisms. In addition, recent studies have shown that the toxicity of P parvum is enhanced when the cells are grown under N- or P-deficient conditions. In this study, the influence of prymnesium toxins on the growth of other phytoplankton species was investigated by addition of cell-free filtrate of P parvum cultures grown under nutrient-deficient (N or P) or non-deficient conditions. Addition of cell-free filtrate from P parvum cultures grown under N or P limitation inhibited the growth of Thalassiosira weissflogii, Prorocentrum minimum and Rhodomonas cf. baltica. In contrast, a strain of Prymnesium patelliferum known to produce prymnesium toxins was not negatively affected under any conditions. Furthermore, addition of filtrates from nutrient-sufficient P parvum cultures did not negatively influence the growth of any of the tested species. These findings suggest that prymnesium toxins may play an allelopathic role, and that the production of allelopathic substances is regulated by the availability of nutrients. (C) 2003 Elsevier Science B.V. All rights reserved
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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