1,721,795 research outputs found
Russula viridicinnamomea F. Yuan & Y. Song, sp. nov. and R. pseudocatillus F. Yuan & Y. Song, sp. nov., two new species from southern China
No full textYuan, Fa, Song, Yu, Buyck, Bart, Li, Jingwei, Qiu, Lihong (2019): Russula viridicinnamomea F. Yuan & Y. Song, sp. nov. and R. pseudocatillus F. Yuan & Y. Song, sp. nov., two new species from southern China. Cryptogamie, Mycologie 20 (4): 45-56, DOI: 10.5252/cryptogamie-mycologie2019v40a4, URL: http://dx.doi.org/10.5252/cryptogamie-mycologie2019v40a
<i>Russula viridicinnamomea</i> F. Yuan & Y. Song, sp. nov. and <i>R. pseudocatillus</i> F. Yuan & Y. Song, sp. nov., deux nouvelles espèces de la Chine du sud
No full textDeux espèces nouvelles du genre Russula Pers., récoltées dans la Réserve Biosphère du Dinghushan, Chine du sud, sont décrites sur des critères morphologiques et phylogénétiques (analyse des séquences ITS), les plaçant toutes deux dans le sous-genre Heterophyllidia Romagnesi. Russula viridicinnamomea F. Yuan & Y. Song, sp. nov. possède un chapeau d’un vert émeraude, des lames souvent fourchues, des basidiospores subréticulées et un pileipellis épais avec des terminaisons composées de cellules typiques, enflées à subglobuleuses et mélangées à d’abondantes dermatocystides réagissant à la sulphovanilline. Russula pseudocatillus F. Yuan & Y. Song, sp. nov. est proche de R. catillus Lee, Park & Lim, mais en diffère par la taille inférieure des carpophores et des pleurocystides, la présence irrégulière de lamellules, ses basidiospores plus grandes et à ornementation plus haute, jamais réticulée et par son pileipellis non gélifié.Two novel species of Russula Pers. subgenus Heterophyllidia Romagnesi, collected from the Dinghushan Biosphere Reserve in southern China, are described and illustrated based on both morphological and phylogenetic analyses of the internal transcribed spacer (ITS) sequences. Russula viridicinnamomea F. Yuan & Y. Song, sp. nov. is characterized by the emerald green-tinged buff pileus with undulate and tearing margin, lamellae that are frequently forked, subreticulate basidiospores with interconnected warts, very thick pileipellis with terminal elements that are often inflated to subglobose, and abundant hymenial cystidia and dermatocystidia, all changing to dark grey in sulphovanillin. Russula pseudocatillus F. Yuan & Y. Song, sp. nov. shows close relationship to Russula catillus Lee, Park & Lim, but it differs from the latter by its smaller basidiomata and pleurocystidia, irregular presence of lamellulae, much bigger basidiospores ornamented with higher warts never forming a reticulum, and not gelatinized pileipellis. Both morphological and molecular analyses consistently confirm the distinctiveness of these two novel taxa in subgenus Heterophyllidia. The differences among two novel taxa and their related species are discussed.</p
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
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
Russula pseudocatillus F. Yuan & Y. Song 2019, sp. nov.
No full text<i>Russula pseudocatillus</i> F. Yuan & Y. Song, sp. nov. (Figs 4, 5) <p> SYSTEMATIC POSITION. — Basidiomycota, Agaricomycetes, Russulales, Russulaceae, <i>Russula</i> subg. <i>Heterophyllidia</i> sect. <i>Ingratae</i>.</p> <p> HOLOTYPE. — China. Guangdong Province, Zhaoqing City, Dinghu Mountain, 14.IX.2016, <i>J.W. Li K16042406,</i> (holo-, GDGM [GDGM 75338]).</p> <p> ETYMOLOGY. <i>—</i> Named for its resemblance to <i>R. catillus</i> in pileus morphology.</p> <p> DIAGNOSIS. — <i>R. pseudocatillus</i> F. Yuan & Y. Song, sp. nov. resembles <i>R. catillus</i> in overall pileus morphology, but it differs from the latter by its smaller basidiomata, presence of lamellula, much bigger basidiospores ornamented with higher warts never forming a reticulum, presence of dermatocystidia (pileocystidia and caulocystidia), smaller pleurocystidia and not gelatinized pileipellis.</p> <p>HABITAT AND DISTRIBUTION. — Gregarious in evergreen broadleaf forest.</p> <p> ADDITIONAL SPECIMENS EXAMINED. — <b>China</b>. Guangdong Province, Zhaoqing City, Dinghu Mountain, 7.VI.2015, <i>J. B. Zhang K15060706</i>.</p> DESCRIPTION <i>Basidiomata</i> <p>Small, agaricoid.</p> <i>Pileus</i> <p>2.5-4 cm in diam., plano-concave or applanate with a depressed center, some slightly decurrent, surface glabrous, slightly viscid when wet, very pale yellow (corn silk, #FFF8DC) at margin, with a pale greyish brown (tan, #D2B48C) center; margin slightly undulate, striate, rarely cracked.</p> <i>Lamellae</i> <p>Adnate, subequal, interveined, often forked near stipe, about 2 mm in height, very pale grayish yellow (beige, #F5F5DC), unchanging when bruised; edge entire, concolorous; lamellulae rather frequent, but not polydymous.</p> <i>Stipe</i> <p>2.5-4 × 0.6-1 cm, central, cylindrical, sometimes slightly tapering upwards, surface dry, slightly longitudinally rugulose, a pale greenish-grayish yellow (goldenrod, #EEE8AA) in the upper part, burlywood at the bottom, stuffed at first, becoming hollow when old.</p> <i>Context</i> <p>Off-white (ivory, #FFFFF0), unchanging when bruised.</p> <i>Odour</i> <p>Indistinct.</p> <i>Taste</i> <p>Mild.</p> <i>Spore print</i> <p>Very pale.</p> <i>Basidiospores</i> <p>Broadly ellipsoid to subglobose, [40/2/2] 7.0-7.9-8.6 (-9.2) × (5.1- (5.5-6.1-6.6 (-6.7) µm, Q = (1.19-) 1.22-1.32-1.42, hyaline in 5% KOH; ornamentations amyloid, composed of conical to cylindrical warts up to 1.2 µm, isolated, never forming a reticulum; suprahilar spot unamyloid.</p> <i>Basidia</i> <p>33-41.5 × 10.5-13 µm, 4-spored, rarely 2-spored, some containing oil droplets; sterigmata up to 8 µm long.</p> <i>Lamellar trama</i> <p>Composed of nested sphaerocytes surrounded by connective hyphae.</p> <i>Pleurocystidia</i> <p>32-37.5 × 9.5-11.5 µm, clavate to subcylindrical, rarely fusiform, with obtuse to truncate apices, thin-walled, with abundant refractive granular contents, negative in SV.</p> <i>Cheilocystidia</i> <p>33-47.5 × 9-12.5 µm, clavate, with mucronate to rostrate apex, thin-walled, some with refractive granular contents, unchanging in SV. Marginal cells not differentiated.</p> <i>Pileipellis</i> <p>Orthochromatic in cresyl blue, divided into two layers: suprapellis trichoderm, composed of ascending to erect hyphae; subpellis a cutis, composed of septate, thin-walled, hyaline hyphae; terminal cells clavate to cylindrical, with obtuse apices; subterminal cells cylindrical or slightly inflated.</p> <i>Pileocystidia</i> <p>Abundant, unchanging in SV, mostly 13-33 × 3-6 µm, onecelled, cylindrical, apex obtuse, with granular contents, also present in subpellis.</p> <i>Stipitipellis</i> <p>A cutis, orthochromatic in cresyl blue, composed of repent, thin-walled, septate hyphae up to 4.6 µm broad.</p> <i>Caulocystidia</i> <p>Frequent, clavate to cylindrical, 16-35 × 3-8 µm, with obtuse or rostrate apex, one-celled, with refractive contents, unchanging in SV.</p> <i>Stipe trama</i> <p>Composed of connective hyphae and nested sphaerocytes.</p> <i>Clamp connections</i> <p>Absent.</p> <i>Notes</i> <p> <i>Russula catillus</i> was reported from Korea, and the name refers to the resemblance of the pileus to a small bowl traditionally used for holding soy sauce. <i>R. pseudocatillus</i> F. Yuan & Y. Song, sp. nov., is sharing similar overall color and shape with <i>R. catillus</i>. Dermatocystidia (both pileocystidia and caulocystidia) are present in our species, but were reported (in Lee <i>et al.</i> 2017) as absent in <i>R. catillus</i>, something that is highly unexpected and should be verified again as all of the presently known species in sect. <i>Ingratae</i> from any part of the world all have abundant dermatocystidia and abundant gloeoplerous elements in all of the tissues. <i>Russula pseudocatillus</i> F. Yuan & Y. Song, sp. nov. is very similar to this <i>R. catillus</i>, but it differs from the latter in its smaller basidiomata, irregular presence of lamellulae, much bigger basidiospores ornamented with higher warts that are never interconnected into a reticulum, and also because of its smaller pleurocystidia and poorly gelatinized pileipellis (see Tables 1, 2).</p>Published as part of <i>Yuan, Fa, Song, Yu, Buyck, Bart, Li, Jingwei & Qiu, Lihong, 2019, Russula viridicinnamomea F. Yuan & Y. Song, sp. nov. and R. pseudocatillus F. Yuan & Y. Song, sp. nov., two new species from southern China, pp. 45-56 in Cryptogamie, Mycologie 20 (4)</i> on pages 50-54, DOI: 10.5252/cryptogamie-mycologie2019v40a4, <a href="http://zenodo.org/record/7814877">http://zenodo.org/record/7814877</a>
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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