1,721,332 research outputs found
FIGURE 3 in Citrus × pubinervia, a new natural hybrid species from central China
No full textFIGURE 3. The phylogram of Bayesian inference (BI) tree from the combined data of matK, rbcL-atpB, trnL-trnF and psbA-trnH. Values above the branches represent bootstrap values (LP, %) for maximum likelihood and Bayesian posterior probabilities (PP), respectively; the dash (–) indicates LP <50%Published as part of Wu, Yu, Liu, Qun, Xiang, Zu-Heng & Zhang, Dai-Gui, 2021, Citrus × pubinervia, a new natural hybrid species from central China, pp. 239-246 in Phytotaxa 523 (3) on page 244, DOI: 10.11646/phytotaxa.523.3.4, http://zenodo.org/record/559143
A new species of Potentilla (Potentilleae, Rosaceae) from central China, with reference to molecular and morphological evidence
No full textZhang, Hua-Jie, Zhang, Dai-Gui, Feng, Tao, Liu, Qun, Yang, Jing-Yuan, Chen, Li, Wang, Heng-Chang, Deng, Tao (2021): A new species of Potentilla (Potentilleae, Rosaceae) from central China, with reference to molecular and morphological evidence. Phytotaxa 480 (2): 185-194, DOI: 10.11646/phytotaxa.480.2.7, URL: http://dx.doi.org/10.11646/phytotaxa.480.2.
Grasslands support more diverse and resilient earthworm communities to climate change than croplands in Central Europe
No full texthttp://dx.doi.org/10.13039/501100001659 German Research Foundationhttp://dx.doi.org/10.13039/501100001664 Wissenschaftsgemeinschaft Gottfried Wilhelm Leibniz e
FIGURE 4 in A new species of Potentilla (Potentilleae, Rosaceae) from central China, with reference to molecular and morphological evidence
No full textFIGURE 4. Illustration of the holotype of Potentilla sunhangii. A. Habit (perennial herb); B. Flower in front view; C. Sepal; D. Episepal; E. Anther with two thecae; F. Oval with lateral style; G. Cauline leaves with ventral stipular auricles.Published as part of Zhang, Hua-Jie, Zhang, Dai-Gui, Feng, Tao, Liu, Qun, Yang, Jing-Yuan, Chen, Li, Wang, Heng-Chang & Deng, Tao, 2021, A new species of Potentilla (Potentilleae, Rosaceae) from central China, with reference to molecular and morphological evidence, pp. 185-194 in Phytotaxa 480 (2) on page 191, DOI: 10.11646/phytotaxa.480.2.7, http://zenodo.org/record/541614
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
Silver-Based Radical Reactions: Development and Insights
Full text linkSilver-mediated reactions have recently emerged as a frontier area in organic chemistry. Indeed, the remarkable property of silver as a single- electron oxidant has led to its exploitment into the field of radical chemistry. The excellent reactivity and high selectivity exhibited by silver salts in the ac- tivation of different organic substrates place them among the most prominent reagents in free radical reactions. The present review aims to provide the readers with a critical overview of silver-based radi- cal reactions, especially emphasizing the reactivity, selectivity and a detailed description of the reaction mechanism with particular attention to the role of Ag(I)-based catalysts/reactants. The selected exam- ples have been classified according to the type of radicals generated, namely carbon-centered radicals and heteroatom (such as nitrogen, oxygen, phospho- rus, sulfur)-centered radicals. The generation of such radicals as well as their application in synthetic pro- cesses including oxidation, addition, coupling, and radical cascades have been described in detail
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
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