214,562 research outputs found
Fig. 1. – Primulina dongguanica F. Wen, Y. G. Wei & R. Q. Luo. A in Primulina dongguanica F. Wen, Y. G. Wei & R. Q. Luo (Gesneriaceae), a new species from South China
No full textFig. 1. – Primulina dongguanica F. Wen, Y. G. Wei & R. Q. Luo. A. Habit; B. Opened corolla with stamens and staminodes; C. One calyx lobe; D. Calyx and pistil. [Fang Wen 100803, IBK] [Drawing: Wen-Hong Lin]Published as part of Wen, Fang & Wei, Yi-Gang, 2014, Primulina dongguanica F. Wen, Y. G. Wei & R. Q. Luo (Gesneriaceae), a new species from South China, pp. 9-19 in Candollea 69 (1) on page 11, DOI: 10.15553/c2014v691a2, http://zenodo.org/record/576184
Fig. 2. – Primulina dongguanica F. Wen, Y. G. Wei & R. Q. Luo. A in Primulina dongguanica F. Wen, Y. G. Wei & R. Q. Luo (Gesneriaceae), a new species from South China
No full textFig. 2. – Primulina dongguanica F. Wen, Y. G. Wei & R. Q. Luo. A. Natural hillside habitat; B. Natural habitat; C. Plant in natural habitat; D. Plant with cymes and flowers in cultivation; E. Frontal view of cyme and flowers; F. Anatomical dissections of the cyme, showing bracts, pistil and opened corolla; G. Lateral view of flower, calyx and pistil; H. daxial and abaxial views of calyx lobes. [D-H: Fang Wen 100803, IBK] [Photos: A-C: Fang Wen; D-E: Shi-Liang Mo; F-H: Wen-Hong Lin]Published as part of Wen, Fang & Wei, Yi-Gang, 2014, Primulina dongguanica F. Wen, Y. G. Wei & R. Q. Luo (Gesneriaceae), a new species from South China, pp. 9-19 in Candollea 69 (1) on page 12, DOI: 10.15553/c2014v691a2, http://zenodo.org/record/576184
Preparation of (R)-2-chloro-1-(m-chlorophenyl)ethanol by Lipozyme TL IM-catalyzed second resolution
No full text(R)-2-Chloro-1-(m-chlorophenyl)ethanol, a precursor of (R)-3-chlorostyrene oxide which is the key chiral intermediate for the preparation of several beta 3-adrenergic receptor agonists was prepared in 40% yield and 99% ee by the Lipozyme TL IM-catalyzed second resolution of the corresponding racemate in the presence of vinyl acetate. (C) 2012 Shi Wen Xia. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved
Primulina undetermined Wen & Wei, 2014, spec. nov.
No full text<p> <i>P. spec. nov.</i></p> <p> <b>CHINA. Guangxi:</b> Baishi, Xingan County, Guilin, 495 m, 1.VII.2010, <i>F. Wen, J. Li & X. Hong 00177</i> (IBK; ANU).</p>Published as part of <i>Wen, Fang & Wei, Yi-Gang, 2014, Primulina dongguanica F. Wen, Y. G. Wei & R. Q. Luo (Gesneriaceae), a new species from South China, pp. 9-19 in Candollea 69 (1)</i> on page 18, DOI: 10.15553/c2014v691a2, <a href="http://zenodo.org/record/5761846">http://zenodo.org/record/5761846</a>
Appropriate Similarity Measures for Author Cocitation Analysis
No full textWe 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
Podocinum anhuense Wen 1965
No full text10. Podocinum anhuense Wen, 1965 Podocinum anhuense Wen, 1965: 353. Podocinum anhuense.— Ho et al., 2009: 91; Yan et al., 2011: 55; 2012: 46. Type depository. Department of Parasitology, Shanghai First Medical College, Shanghai, China. Type locality and habitat. China, Anhui Province, 7 December 1959, in nest of Cricetulus barabensis (Pallas) [Mammalia: Rodentia: Cricetidae].Published as part of Barros, Avyla R. A., Castilho, Raphael C. & De Moraes, Gilberto J., 2020, Catalogue of the mite family Podocinidae Berlese (Acari: Mesostigmata), pp. 141-156 in Zootaxa 4802 (1) on page 149, DOI: 10.11646/zootaxa.4802.1.9, http://zenodo.org/record/390496
"Closing the R&D Gap, Evaluating the Sources of R&D Spending"
No full textBoth spending and tax policies have been implemented in the United States with the goal of stimulating private sector research and development (R&D). Karier questions whether current R&D policy, especially the research and experimentation tax credit, can contribute to closing the gap between nondefense expenditures on R&D in the United States and such expenditures in other countries, such as Japan and Germany. He also explores possible changes to our current R&D policy to make it more effective.
The time-varying nature of the asymmetrical flow of a shear-thinning polymer solution in transitional pipe flow
No full textPrevious studies of shear-thinning fluids in pipe flow discovered that, although the time-averaged velocity profile was axisymmetric when the flow was laminar or fully turbulent, contrary to expectations it was asymmetric in the laminar-turbulent transition regime. The general consensus of these previous experiments was that the location of the peak velocity remained at a fixed point in space. We present new experimental data which demonstrates that this is in fact not the case. Our results confirm the significant departures from axisymmetry in transitional flows of shear-thinning fluids, in addition to the observation that the asymmetric flow pattern is not stationary, the peak velocity is seen to preferentially arise at certain azimuthal locations
Primulina dongguanica F. Wen, Y. G. Wei & R. Q. Luo 2014, spec. nova
No full textPrimulina dongguanica F. Wen, Y. G. Wei & R. Q. Luo, spec. nova (Fig. 1-2). Typus: CHINA. Guangdong: Yinpingzui nature reserve in Dongguan city, grows in crevices of granite cliffs under subtropical evergreen broad-leaved forests and shrubs, ca. 276 m, 22º53’N, 114º14’E, 3.VIII.2009, Fang Wen 100803 (holo-: IBK!; iso-: IBK!). A Primulina eburnea, P. dryas, P. napoensis et P. spec. nov. differt bractis rhombiformis, sub angulo ca. 45 ° abientibus, calyx lobis late lanceolatis, corolla 4.5-5.5 cm longa, filamentis ca. 20 mm longis, pistillo 3.5-4.2 cm longo, dense villoso, eglandulato. Perennial herbs. Short somewhat succulent stems, 1-1.5 cm long, 1.1-1.2 cm in diameter, internodes indistinct. Leaves 6-10, basal or in whorls of three arranged at the top of stem; leaf lamina fleshly chartaceous, ovate-elliptic, 7-15 X 6-10.5 cm, base slightly oblique or symmetrical, broadly cuneate to cordate, margin irregularly obtuse-serrate, apex acute, sparsely strigose on both sides, 3-4-nerved on each side; petiole compressed, 2.5-6.5 X 0.7-1 cm, pubescent and sparsely strigose. Cymes axillary, 3-5 or more, 3-5-flowered or more; peduncle 10.5-16 cm long, 1.7-2.3 mm in diameter, densely erectly long pubescent; bracts 2, opposite, rhombic, 2.1-4.5 X 1.2-1.6 cm, pubescent outside, nearly glabrous inside, positioned at ca. 45° angle, margin entire, apex acute; pedicel 8- 17.5 mm long, densely long pubescent. Pedicel 1.2-2.2 cm, puberulent and glandular puberulent. Calyx 5-parted to the base, lobes equal, broadly lanceolate, ca. 5 X 1.8-2.2 mm, pubescent outside, nearly glabrous inside. Corolla 4.5-5.5 cm long, orifice 9- 1.1 mm in diameter, purple, lilac or fuchsia, the colour of the throat pale purple with two yellowish brown stripes, tubular, the upper part of the interior of the corolla with two dark brown stripes; interior yellowish brown, tube swollen, outer side densely erect-pubescent, inner glabrous; limb distinctly 2-lipped, adaxial lip 2-parted to the middle, lobe ca. 1 cm long, triangular; abaxial lip 3-parted to the base, lobes oblong, 1.2-1.3 cm long. Stamens 2, adnate to ca. 2.3 cm above the corolla base; anthers reniform, ca. 5 mm long, slightly constricted at the middle, glabrous; filaments ca. 2 cm long, pubescent, geniculate at the middle; staminodes 2 with broad base, gradually narrowed to apex, curved in upper part, apex capitate, 8-9 mm long, glabrous; disc annular, brown, ca. 1 mm high. Pistil 3.5-4.2 cm long, densely pubescent, eglandular; ovary linear; style 4-5 mm long. Stigma 2-lobed, 2.5-3 mm long. Capsule and seeds not seen. Etymology. – The specific epithet is derived from the type locality, Dongguan City, Guangdong. Phenology. – Flowering in August. Distribution and habitat. – Primulina dongguanica only grows on a mountainside in the Yinpingzui nature reserve, Guangdong (Dongguan) of China (Fig. 3), at an altitude of 276 m. All plants are growing in damp and dark crevices of granite cliffs near a stream. Conservation. – The only known population is located near a road, and human activities can potentially jeopardize the existence of this species. In WEI & al. (2010), we had assigned the IUCN Category EN B2b (ii, iii, iv). Recently, in November 2012, we revisited the type locality again, and found to our surprise the site destroyed due to road building work. Less than 50 individuals only survived. According to IUCN red list categories (IUCN, 2001: 16-18; PULLIN, 2004), we therefore appraised P. dongguanica as Critically Endangered, CR B2ab (i, iii, v) + C2a (ii). Morphological relationships. – Primulina dongguanica F. Wen, Y. G. Wei & R. Q. Luo is morphologically similar to P. eburnea (Hance) Y. Z. Wang (Fig. 4), P. dryas (Dunn) Mich. Möller & A. Weber (Fig. 5 A-D), P. napoensis (Z. Y. Li) Mich. Möller & A. Weber (Fig. 5 E-H) and P. spec. nov. (Fig. 6), but differs from above-mentioned species in bract morphology and position, calyx lobes shape, filament and pistil length and indumentum, and flowering time (Table 1).Published as part of Wen, Fang & Wei, Yi-Gang, 2014, Primulina dongguanica F. Wen, Y. G. Wei & R. Q. Luo (Gesneriaceae), a new species from South China, pp. 9-19 in Candollea 69 (1) on pages 10-13, DOI: 10.15553/c2014v691a2, http://zenodo.org/record/576184
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe 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
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