3,846 research outputs found
Panus bambusinus N. Vinjusha & T. K. A. Kumar, comb. nov.
No full text<i>Panus bambusinus</i> (T.K.A. Kumar & Manim.) N. Vinjusha & T.K.A. Kumar <i>comb. nov.</i> <p> Basionym:— <i>Lentinus bambusinus</i> T.K.A. Kumar & Manim., Mycotaxon 92: 119 (2005) (Fig. 1)</p> <p> Description: <i>—Basidiomata</i> annual, small to large, solitary or caespitose, centrally stipitate. <i>Pileus</i> 15‒200 mm diam, weakly depressed in the centre or infundibuliform, concentric zone absent, squamulose when young, almost glabrous with age, wrinkled in dried specimens, yellowish brown to light brown, margin entire, dentate or irregularly lobed. <i>Hymenophore</i> lamellate. Lamellae close, decurrent, sometimes dichotomously branched, edge finely fimbriate under a 10×lens, lamellulae present in 3‒4 tiers, yellowish white. <i>Context</i> up to 6 mm thick, white. <i>Stipe</i> 40‒100 mm long, 5‒25 mm thick, central, cylindrical, even in younger specimens, tapering towards the base in older specimens, surface glabrous to matted fibrillose or strigose, sometimes with sparse and scattered squamules, yellowish white to brown, tissue solid, cream. <i>Odour</i> not distinct. <i>Spore print</i> not observed.</p> <p> <i>Basidiospores</i> 5–6.5 × 4–4.5 μm, Q=1.3–1.7, Q m =1.32, ellipsoid to ovoid, hyaline, smooth, thin-walled, with refractive guttules, inamyloid in Melzer’s reagent. <i>Basidia</i> 20‒37 × 5‒7 μm, clavate, 4 sterigmate. <i>Cheilocystidia</i> present, 22‒68 × 3‒5 μm, versiform, generally flexuose, branched towards apex, hyaline, smooth, thin-walled with obtuse tips. <i>Gloeocystidia</i> frequent on edges and sides of lamellae, 24‒48 × 6‒15 μm, mostly fusoid with acuminate tips, or narrowly clavate, hyaline, smooth, thin-walled. <i>Hyphal pegs</i> absent. <i>Hymenial trama</i> radially arranged, and dimitic. Generative hyphae 2‒6 μm wide, hyaline, smooth, thin to slightly thick-walled (up to 1 μm), branched, with clamp connections. Skeletal hyphae dominant, 2‒4 μm wide, hyaline, thick-walled (1 μm), mostly unbranched, rarely branched, septations not observed. Skeleto ligative hyphae not observed. <i>Pileal trama</i> radially arranged. Generative hyphae 2‒6 μm wide, rarely inflated up to 10 µm, hyaline, smooth, thin to slightly thick-walled (up to 1 μm), branched, with clamp connections. Skeletal hyphae dominant, 2‒6 μm wide, hyaline, thick-walled (1 μm), mostly unbranched, rarely branched, septations not observed. Skeleto ligative hyphae not observed. <i>Pileipellis</i> with scattered trichodermial patches, up to 100 μm long, made of hyphae that are 2‒4 μm wide, hyaline, thin to slightly thick-walled (up to 1 µm), with obtuse ends. <i>Stipe trama</i> interwoven. Generative hyphae 2‒5 μm wide, hyaline, smooth, thin to slightly thickwalled (up to 1 μm), branched, with clamp connections. Skeletal hyphae 2‒5 μm wide, hyaline, thick-walled (1 μm), mostly unbranched, rarely branched, septations not observed. <i>Stipitipellis</i> similar as pileipellis, made of hyphae that are 2‒4 μm wide, hyaline, mostly thin-walled, with obtuse ends.</p> <p> Specimens examined:— INDIA. Kerala State: Malappuram district, Thenjipalam, Calicut University Campus, Alt. 2 m, 1.1339° N, 75.8940° E, on dead roots and rhizomes of <i>Bambusa bambos</i>, 2 July 2004, <i>Arun Kumar AK61</i> <i>a;</i> 5 July 2004, <i>Arun Kumar AK61</i> <i>b</i> (part of the holotype deposited at L); 18 October 2004, <i>Arun Kumar AK61</i> <i>c</i>; 20 October 2004, <i>Arun Kumar AK61</i> <i>d</i>; 26 October 2004, <i>Arun Kumar AK61</i> <i>e</i>.</p>Published as part of <i>Arun Kumar, T. K., 2021, Two new combinations in the genus Panus (Panaceae, Polyporales) based on morphology and molecular phylogeny, pp. 287-294 in Phytotaxa 514 (3)</i> on page 289, DOI: 10.11646/phytotaxa.514.3.8, <a href="http://zenodo.org/record/5316276">http://zenodo.org/record/5316276</a>
Termitomyces assamicus (Lyophyllaceae)-A new species of Termitomyces from India
No full textDas, Lakshmi Rupa, Chattopadhyay, Pinaki, Dutta, Arun Kumar, Narzary, Diganta, Rana, Tikam S. (2023): Termitomyces assamicus (Lyophyllaceae)-A new species of Termitomyces from India. Phytotaxa 599 (2): 126-136, DOI: 10.11646/phytotaxa.599.2.4, URL: http://dx.doi.org/10.11646/phytotaxa.599.2.
Close-to-Dirac point shift of large-area MOCVD-grown Bi2Te3’s Fermi level following growth on Sb2Te3
No full textWe developed a Metal Organic Chemical Vapour Deposition (MOCVD) process to grow the bi-layered Bi2Te3(top)/Sb2Te3 topological insulator on top of 4’’ Si(111). In single-phase Bi2Te3/Si(111), we have previously demonstrated clear topologically-protected surface states (TSS) by angle-resolved photoemission spectroscopy (ARPES) and magnetotransport, but a strong bulk contribution was still present with the Fermi level (EF) crossing the conduction band at ~0.5 eV above the Dirac point [1]. Following the growth of 90 nm Bi2Te3 in direct contact with 30 nm Sb2Te3, we observed by ARPES a remarkable shift of EF towards the Dirac point, totally suppressing the bulk states’ contribution. This was confirmed by magnetotransport, where, within the Hikami-Larkin-Nagaoka model, we measured an ideal α=-0.5 due to the optimized topologically-protected surface states. We will also present the first attempts in making use of such close-to-ideal positioning of the Bi2Te3’s Fermi level to manipulate magnetic figures in 2D-ferromagnet CrTe2 grown on top of the developed Bi2Te3/Sb2Te3/Si(111) heterostructure.
[1] L. Locatelli, A. Kumar, P. Tsipas, A. Dimoulas, E. Longo, R. Mantovan, "Magnetotransport and ARPES studies of the topological insulators Sb2Te3 and Bi2Te3 grown by MOCVD on large-area Si substrates" Scientific Reports 12, 3891 (2022).
*We acknowledge the Horizon 2020 project SKYTOP "Skyrmion-Topological Insulator and Weyl Semimetal Technology" (FETPROACT-2018-01, n. 824123)
FIGURE 1. Albunea groeningi Boyko, 2002 in A new distribution record of Albunea groeningi (Crustacea: Anomura: Decapoda: Albuneidae) from the Digha Coast, West Bengal, India
No full textFIGURE 1. Albunea groeningi Boyko, 2002, male CL 6.30 mm. A, dorsal view; B, ventral view; C, carapace and branchiostegite, dorsal view; D, abdominal somites I–VI, and telson of male, dorsal view; E, distal ocular peduncular segments with corneas; F, right pereopod I; G, right pereopod III; H, right pereopod II.Published as part of Yogesh Kumar, J. S., Boyko, Christopher B., Arun, G., Geetha, S. & Raghunathan, C., 2020, A new distribution record of Albunea groeningi (Crustacea: Anomura: Decapoda: Albuneidae) from the Digha Coast, West Bengal, India, pp. 588-592 in Zootaxa 4766 (4) on page 589, DOI: 10.11646/zootaxa.4766.4.5, http://zenodo.org/record/376576
Towards a Rule-based matrix for evaluating distress mechanisms in bridges
No full textOne of the key issues facing public asset owners is the decision of refurbishing aged built\ud
assets. This decision requires an assessment of the “remaining service life” of the key\ud
components in a building. The remaining service life is significantly dependent upon the\ud
existing condition of the asset and future degradation patterns considering durability and\ud
functional obsolescence. Recently developed methods on Residual Service Life\ud
modelling, require sophisticated data that are not readily available. Most of the data\ud
available are in the form of reports prior to undertaking major repairs or in the form of\ud
sessional audit reports. Valuable information from these available sources can serve as\ud
bench marks for estimating the reference service life. The authors have acquired similar\ud
informations from a public asset building in Melbourne. Using these informations, the\ud
residual service life of a case study building façade has been estimated in this paper based\ud
on state-of-the-art approaches. These estimations have been evaluated against expert\ud
opinion. Though the results are encouraging it is clear that the state-of-the-art\ud
methodologies can only provide meaningful estimates provided the level and quality of\ud
data are available. This investigation resulted in the development of a new framework for\ud
maintenance that integrates the condition assessment procedures and factors influencing\ud
residual service lif
Self-Assembly of a Guanosine Derivative To Form Nanostructures and Transmembrane Channels
No full textWe herein report the self-assembly of a lipophilic bromoguanosine derivative (G1) in homogeneous solution, in the solid state and in planar bilayer membranes. The self-assembly of G1, driven by H-bonding and π–π stacking interactions can form different nano-structures depending on incubation time. The G1 nanostructure is able to bind a bioactive dye like Rose Bengal. In crystal state, it shows ribbon type H-bonding pattern and exhibits birefringence in polarized light. And further, the self-assembled nanostructure of G1 can form discrete transmembrane ion channels in lipid bilayer membranes, enabling passage of potassium ions
Re-life of buildings - decision support tools for maximising project efficiency
No full textThis paper describes the process adopted in developing an integrated decision support framework for planning of office building refurbishment projects, with specific emphasize on optimising rentable floor space, structural strengthening, residual life and sustainability. Expert opinion on the issues to be considered in a tool is being captured through the DELPHI process, which is currently ongoing. The methodology for development of the integrated tool will be validated through decisions taken during a case study project: refurbishment of CH1 building of Melbourne City Council, which will be followed through to completion by the research team. Current status of the CH1 planning will be presented in the context of the research project
Boletinellus viridianus Salna Nanu & T. K. A. Kumar 2023, sp. nov.
No full textBoletinellus viridianus Salna Nanu & T.K.A. Kumar, sp. nov., Figs. 2–3 MycoBank:—MB846744 Etymology:—“ viridianus ” refers to the bluish green color change of the tissues after bruising. Diagnosis:—This species differs from all other species of Boletinellus by its pale yellowish pileal context immediately turning bluish green; stipe surface covered with poroid-lamellate hymenophore extending throughout the stipe; oblong to ellipsoid, small, inamyloid basidiospores, 6.5–7.5 × 5–5.5 µm (Q = 1.2–1.4, Qm = 1.29), a cutis type of pileipellis with intermittent trichodermal clusters of filamentous hyphae. Holotype:— INDIA. Kerala State, Palakkad district, Parambikkulam, 5 June 2022, Salna Nanu (ZGCSN163). GenBank accession numbers: 28 S = OP526842, ITS = OP542551. Description:— Basidiomata medium-sized. Pileus 40–100 mm diam., convex when young becoming nearly applanate at maturity, slightly depressed at center with age; margin incurved to nearly undulate; surface glabrous or sub-velutinous, becoming viscid when wet, brownish to yellowish brown, sometimes with grayish brown or dark brownish tinge. Context thick, 10–25 mm, pale yellowish, immediately turning bluish green on bruising. Hymenophore deeply decurrent, poroid-lamellate, lamellae connected with many cross-veins; pores 3–5 mm wide, angular, elongate towards the margin, yellowish, pale yellow towards the margin, becoming brownish yellow with age, turning bluish green immediately on bruising; tubes up to 3 mm long, yellowish, turning bluish green when cut. Stipe 30–60 × 8–30 cm, eccentric to lateral, subcylindrical, enlarging towards the base; surface covered with poroid-lamellate hymenophore extending to the stipe base, denser towards the center, sparse at the base; surface pale yellowish in the central part, off white to yellowish in the lower and upper parts, changing bluish green immediately on bruising. Context thick, firm, pale yellowish, with pinkish or reddish brown tinges, turning blue slowly on exposure. Basidiospores 6.5–7.5 × 5–5.5 µm [Q = (1.2–1.4, Qm = 1.29], oblong to ellipsoid, with a large oil drop, yellowish in water, thin- to thick-walled (up to 1 µm), inamyloid. Basidia 26–36 × 6–10 µm, narrowly clavate to clavate, 4- spored, rarely 2-spored, thin-walled, hyaline to pale yellow in water; sterigmata up to 5 µm long. Pleurocystidia 21–35 × 4–9 µm, rare, subfusiform or flexuose, sometimes with a secondary septum, most with attenuated apex, thin-walled, hyaline to pale yellow in water. Cheilocystidia similar to pleurocystidia in size and shape, rare. Hymenophoral trama divergent, sometime with swollen hyphae; hyphae 3.5–21 µm wide, thin-walled, hyaline to pale yellow in water. Pileipellis a cutis with trichodermal patches of filamentous hyphae, 3–7 µm wide, thin-walled, pale yellowish in water; pileal trama consisting of interwoven hyphae, 3–8 µm wide, thin-walled. Stipitipellis a cutis disrupted by patches of hymenophoral structures, caulobasidia similar to hymenial basidia in shape and size. Clamp connections present in all tissues. Odor and taste not observed. Spore print not obtained. Habitat: On soil. Scattered under Terminalia species. Additional specimen examined: INDIA. Kerala State, Palakkad district, Parambikkulam, 6 June 2022, Salna Nanu (ZGCSN186).Published as part of Nanu, Salna & Arun Kumar, T. K., 2023, A new species of Boletinellus (Boletinellaceae, Boletales) from India, pp. 223-231 in Phytotaxa 594 (3) on pages 227-229, DOI: 10.11646/phytotaxa.594.3.6, http://zenodo.org/record/790132
Fabrication of a Flexible UV Band-Pass Filter Using Surface Plasmon Metal-Polymer Nanocomposite Films for Promising Laser Applications
No full textWe introduce a strategy for the fabrication of silver/polycarbonate (Ag/PC) nanocomposite flexible films of (20 +/- 0.01) mu m thickness with different filling factor of surface plasmon metal using customized solution cast thermal evaporation method. Structural characterizations confirmed the good crystallinity with cubic phase of Ag nanoparticles in PC films. Moreover, the microstructural evolutions of nanocomposite films are investigated by transmission electron microscopy, which indicates that the metal fraction is in the form of fractals. Additionally, the surface plasmonic behavior of nanocomposite films has been explored in detail to examine the distribution of Ag nanoparticles in PC film by spectroscopic technique. Furthermore, the obtained transmittance spectral features of this nanocomposite film are suitable for the applications of band-pass filter at 320 nm UV range, which is highly desirable for a HeCd laser
Supplement_4 - Hepatic Transcriptomic Patterns in the Neonatal Rat After Pentabromodiphenyl Ether Exposure
No full textSupplement_4 for Hepatic Transcriptomic Patterns in the Neonatal Rat After Pentabromodiphenyl Ether Exposure by June K. Dunnick, Keith R. Shockley, Daniel L. Morgan, Gregory S. Travlos, Kevin Gerrish, Thai-Vu T. Ton, Ralph Wilson, Sukhdev S. Brar, Amy E Brix, Suramya Waidyanatha, Esra Mutlu and Arun Kumar R. Pandiri in Toxicologic Pathology</p
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