177,631 research outputs found
Moniliophthora conchata Antonin, R. Ryoo
No full textMoniliophthora conchata (Har. Takah.) Antonín, R. Ryoo & K.-H. Ka, comb. nov. Basionym: Crinipellis conchata Har. Takah., Mycoscience 43: 343, 2002. Syn.: Chaetocalathus conchatus (Har. Takah.) Vizzini, Rivista di Micologia 51: 66, 2008. Mycobank MB 808334 During our field research an almost identical fungus was found.It only differed in having distinctly smaller basidiospores, and, therefore, is described as a new variety here.Published as part of Antonín, Vladimír, Ryoo, Rhim, Ka, Kang-Hyeon & Sou, Hong-Duck, 2014, Three new species of Crinipellis and one new variety of Moniliophthora (Basidiomycota, Marasmiaceae) described from the Republic of Korea, pp. 86-102 in Phytotaxa 170 (2) on page 96, DOI: 10.11646/phytotaxa.170.2.2, http://zenodo.org/record/513896
Detailed structure of the hexagonally packed mesostructured carbon material CMK-3
No full textDetailed investigation of the ordered mesoporous CMK-3 carbon using XRD structural modeling based on the continuous electron density representation and the Rietveld technique allowed deriving comprehensive and consistent information on the material anatomy. The electron density distribution map agrees with carbon 'bridges', which seem to be attributed to the material interconnecting carbon nanorods in the CMK-3 mesostructure. These carbon 'bridges' are supposed to be derived from former complementary mesopores of the SBA-15 template used. (C) 2002 Elsevier Science Ltd. All rights reserved.We are grateful to the INTAS Fellowship grant for Young Scientists YSF 2001/ 2-3, INTAS grant (proposal 2283) and joint grant KRSF-RFBR 02-03-97704. R. Ryoo gratefully acknowledges that this work was supported in
part by the Ministry of Science and Technology through Creative Research Initiative Program, and by School of Molecular Science through Brain Korea 21 Project
Gymnopus similis Antonin, R. Ryoo & K. H. Ka
No full text<i>Gymnopus similis</i> Antonín, R. Ryoo & K.H. Ka in Ryoo <i>et al.</i>, Phytotaxa 268(2): 82, 2016. (FIGURES 2e–g and 5) <p> <i>Description:—Basidiomata</i> gregarious. <i>Pileus</i> 10–33 mm broad when dry, plano-convex to applanate, with plane or slightly depressed centre and inflexed then straight margin, surface shallowly sulcate-striate except for the smooth or rugulose centre, light brown (6D5), orange white (5A2) to greyish orange (6B3) when old. <i>Lamellae</i> emarginate, L = 16–21, l = 1–3, rugulose-intervenose at the base, orange white (5A2) to greyish orange (6B3). <i>Stipe</i> 55–95 × 1–4 mm, cylindrical to clavate, 1–2 mm thick at the centre, sometimes grooved, laterally compressed or equal to slightly inflated to nearly clavate towards the base (2–4 mm), densely whitish tomentose, orange white (6A2) to greyish orange (6B5) or reddish white (7A2) when old; with a whitish to light ochraceous basal tomentum. <i>Odour</i> distinct, like garlic.</p> <p> <i>Basidiospores</i> 6–7.5 (‒10) × 2.5–3 (‒3.5) μm, (average = 6.8 × 3.0 μm, n = 40, E = 2.00–2.33 (‒2.67), Q = 2.24), ellipsoid, sublacrymoid, hyaline, thin-walled. <i>Basidia</i> indistinct (possibly because the sample has been overdried and is in non-ideal state), most likely with the similar size and shape to basidioles. <i>Basidioles</i> 14.5–32 × 3.5–6 μm, cylindrical to clavate. <i>Cheilocystidia</i> rare, 14‒39 × 3‒8 μm, clavate, subcylindrical to irregular, thin-walled. <i>Pleurocystidia</i> absent. <i>Pileipellis</i> a cutis composed of cylindrical, thin- to slightly thick-walled, smooth, up to 9 μm wide hyphae; terminal cells cylindrical, slightly coralloid at the apex, obtuse, smooth. <i>Stipitipellis</i> a cutis composed of cylindrical, parallelly arranged, slightly thick-walled, smooth, 4–8 μm wide hyphae. <i>Caulocystidia</i> numerous, 20–53 × 4.5–10 μm, cylindrical, narrowly clavate to sometimes irregular or branched, obtuse, hyaline, thin-walled. <i>Clamp connections</i> present.</p> <p> <i>Habitat:</i> —Gregarious on debris in a broad-leaf forest.</p> <p> <i>Material studied:</i> — CHINA, Zhejiang Province, Hangzhou City, West Lake, 30° 25’ 89” N, 120° 14’ 34” E, alt. 15 m, 8 September 2019, <i>Z. Feng</i> (GDGM 78308).</p> <p> <i>Remarks:— Gymnopus similis</i> is characterized by a rather pale coloured pileus, distant lamellae ruguloseintervenose at the base, a distinct garlic smell, moderately large basidiospores and numerous, versiform cheilo- and caulocystidia (Ryoo <i>et al.</i> 2016). The Chinese collection differs from the type collection by the lack of numerous cheilocystidia and slightly smaller basidiospores based on the comparison with the original description [The spore size of the type (BRNM 766739) was (6‒) 6.5–8 (‒9) × 2.7–4 μm (Ryoo <i>et al.</i> 2016)]. However, the phylogenetic analyses suggested that they are conspecific. This collection represents the first record to China.</p>Published as part of <i>Li, Ji-Peng, Li, Yu, Li, Tai-Hui, Antonín, Vladimír, Hosen, Md Iqbal, Song, Bin, Xie, Meng-Le & Feng, Zhan, 2021, A preliminary report of Gymnopus sect. Impudicae (Omphalotaceae) from China, pp. 263-276 in Phytotaxa 497 (3)</i> on page 271, DOI: 10.11646/phytotaxa.497.3.5, <a href="http://zenodo.org/record/5423989">http://zenodo.org/record/5423989</a>
Pore structure and graphitic surface nature of ordered mesoporous carbons probed by low-pressure nitrogen adsorption
No full textOrdered mesoporous carbons (OMCs) were produced by pyrolysis of sucrose adsorbed in two different silica matrices (MCM-48 and SBA-15), followed by dissolution of the matrix in hydrofluoric acid. Subsequently, some of these OMCs were heat-treated at temperatures of up to 1600 degreesC. The ONIC pore structure was studied by low-pressure nitrogen adsorption. Information on the graphitic order of the surface of the mesopore walls was also obtained from the nitrogen adsorption data. These results were correlated to the order of the graphene layers at the outer surface, which was studied by X-ray photoelectron spectroscopy (XPS). The OMCs were predominantly mesoporous, but they also contained micropores. For OMCs produced in an SBA- 15 matrix, the micropore volume decreased upon heating. After heating to 1600 degreesC, nearly all micropores had disappeared. Furthermore, upon heating the width of the mesopores increased from 35 to 50 Angstrom. All these changes can be explained by a shrinking of the OMC framework upon heating. A different behavior was found for OMCs derived from MCM-48. Upon heating these materials at increasingly high temperatures, the width of the mesopores first decreased, and for temperatures above 1100 degreesC it increased again. For all OMCs studied the graphitic order of the mesopores and the order of the graphene layers at the outer surface increased upon heating. For a given temperature, the graphitic surface order of OMCs derived from SBA-15 and MCM-48 was similar. (C) 2003 Elsevier Science Inc. All rights reserved.The authors are thankful to Dr. Annette
Schwerdtfeger for reviewing the manuscript. R. Ryoo gratefully acknowledges that this work was supported in part by the Korean Ministry of Science and Technology through the Creative Research Initiative Program, and by the School of Molecular Science through the Brain Korea 21 Project
Organosilane surfactant-directed synthesis of mesoporous aluminophosphates constructed with crystalline microporous frameworks
No full textA direct hydrothermal assembly process was developed to synthesize mesoporous aluminophosphates that are constructed with crystalline microporous frameworks, by the addition of organosilane surfactants into the conventional synthesis composition for crystalline microporous aluminophosphates.This work is supported by the Ministry of Science and Technology through the Creative Research Initiative Program
Mesoporous materials with zeolite framework: remarkable effect of the hierarchical structure for retardation of catalyst deactivation
No full textHierarchical MFI zeolite was synthesized following a synthesis route using organic - inorganic hybrid surfactants; the resultant zeolite with mesoporous/microporous hierarchical structure exhibited remarkably high resistance to deactivation in catalytic activity of various reactions such as isomerization of 1,2,4-trimethylbenzene, cumene cracking, and esterification of benzyl alcohol with hexanoic acid, as compared with conventional MFI and mesoporous aluminosilicate MCM-41.This work is supported by the Ministry of Science and Technology through the Creative Research Initiative Program
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
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