1,720,956 research outputs found
Antioxidant responses against high environmental oxygen concentration: glutathione peroxidase from the Antarctic teleost Trematomus eulepidotus.
No full text
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
Functional genomic analysis of constitutive and inducible defense responses to Fusarium verticillioides infection in maize genotypes with contrasting ear rot resistance
No full textRESEARCH ARTICLE Open Access
Functional genomic analysis of constitutive and
inducible defense responses to
Fusarium
verticillioides
infection in maize genotypes
with contrasting ear rot resistance
Alessandra Lanubile
1
, Alberto Ferrarini
2
, Valentina Maschietto
1
, Massimo Delledonne
2
, Adriano Marocco
1*
and Diana Bellin
2
Abstract
Background:
Fusarium verticillioides
causes ear rot in maize (
Zea mays
L.) and accumulation of mycotoxins, that
affect human and animal health. Currently, chemical and agronomic measures to control
Fusarium
ear rot are not
very effective and selection of more resistant genotypes is a desirable strategy to reduce contaminations. A deeper
knowledge of molecular events and genetic basis underlying
Fusarium
ear rot is necessary to speed up progress in
breeding for resistance.
Results:
A next-generation RNA-sequencing approach was used for the first time to study transcriptional changes
associated with
F. verticillioides
inoculation in resistant CO441 and susceptible CO354 maize genotypes at 72 hours
post inoculation. More than 100 million sequence reads were generated for inoculated and uninoculated control
plants and analyzed to measure gene expression levels. Comparison of expression levels between inoculated vs.
uninoculated and resistant vs. susceptible transcriptomes revealed a total number of 6,951 differentially expressed
genes. Differences in basal gene expression were observed in the uninoculated samples. CO441 genotype showed
a higher level of expression of genes distributed over all functional classes, in particular those related to secondary
metabolism category. After
F. verticillioides
inoculation, a similar response was observed in both genotypes, although
the magnitude of induction was much greater in the resistant genotype. This response included higher activation of
genes involved in pathogen perception, signaling and defense, including WRKY transcription factors and jasmonate/
ethylene mediated defense responses. Interestingly, strong differences in expression between the two genotypes were
observed in secondary metabolism category: pathways relate
d to shikimate, lignin, flavonoid and terpenoid biosynthesis
were strongly represented and induced in the CO441 genotype
, indicating that selection to enhance these traits is an
additional strategy for improving resistance against
F. verticillioides
infection.
Conclusions:
The work demonstrates that the global transcriptional analysis provided an exhaustive view of genes
involved in pathogen recognition and signaling, and controlling activities of different TFs, phytohormones and secondary
metabolites, that contribute
to host resistance against
F. verticillioides
. This work provides an important source of markers
for development of disease resistance maize genotypes and
mayhaverelevancetostudyoth
er pathosystems involving
mycotoxin-producing fungi
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
Author-wise bibliometric analysis based on entropy.
No full textAuthor-wise bibliometric analysis based on entropy.</p
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