17,214 research outputs found
Xenochironomus lacertus Dutta et Chaudhuri 1995
No full textXenochironomus lacertus Dutta et Chaudhuri, 1995 Xenochironomus lacertus Dutta and Chaudhuri 1995: 29. Original material: Holotype male (Type n° 216, B.U.Ent), INDIA, [West] Bengal [state], Coochbehar, 7.iii. 1986, leg.: T. K. Dutta. Paratypes: Madrihat, 24. iii.1988, 4 males, leg. T. K. Dutta; Kumargram, 24. iii.1988, 3 males, leg.: T. K. Dutta. Type material unavailable. Diagnosis based on original description and illustrations. X. lacertus can be separated from other species in the genus by the following characteristics: male with superior volsella broad and large with a ventral digitiform projection; inferior volsella curved ventrodorsalyPublished as part of Fusari, Lívia Maria, Roque, Fabio De Oliveira & Hamada, Neusa, 2013, Review of Xenochironomus Kieffer, 1921 (Diptera: Chironomidae) with description of six new species, pp. 101-126 in Zootaxa 3646 (2) on page 106, DOI: 10.11646/zootaxa.3646.2.1, http://zenodo.org/record/21950
RCSB Protein Data Bank: A Resource for Chemical, Biochemical, and Structural Explorations of Large and Small Biomolecules
No full textThe Research Collaboratory for Structural Bioinformatics (RCSB) Protein Data Bank (PDB) supports scientific research and education worldwide by providing access to annotated information about three-dimensional (3D) structures of macromolecules (e.g., nucleic acids, proteins), and associated small molecules (e.g., drugs, cofactors, inhibitors) in the PDB archive. Researchers, educators, and students use RCSB PDB resources to study the shape and interactions of biological molecules and their implications in molecular biology, medicine, biotechnology, and beyond. RCSB PDB supports development of standards for data deposition, representation, annotation, and validation of atomic structural data obtained from various experimental methods. Uniform representation of PDB data is essential for providing consistent search and analysis capabilities for all PDB users, from beginning students to domain experts. The RCSB PDB Web site provides tools for searching, visualizing, and analyzing PDB data, including easy exploration of chemical interactions that stabilize macromolecules and play important roles in their interactions and functions. In addition, educational resources are available for free and unrestricted use in the classroom for exploring chemistry and biology at the molecular level.This document is the Accepted Manuscript version of a Published Work that appeared in final form in Journal of Chemical Education, copyright © American Chemical Society after peer review and technical editing by the publisher. To access the final edited and published work see https://dx.doi.org/10.1021/acs.jchemed.5b00404Peer reviewe
Uporaba mehanizmov trajnostnega razvoja za okoljsi, gospodarski in družbeni razvoj podjetja Hindustan Paper Corporation
No full textVolvariella bilobata A. K. Dutta & P. Chattopadhyay 2022, sp. nov.
No full textVolvariella bilobata A.K. Dutta & P. Chattopadhyay, sp. nov., Figures 1 & 2 MycoBank MB 844749 Etymology:—The specific epithet ‘ bilobata ’ derived from Latin ‘bi’ meaning “two”, and ‘lobatus’, meaning “having lobes”, together referring to the two-lobed volva. Diagnosis:—Differs from Volvariella volvacea by bilobed volva, smaller basidiospores (4.8–5.5 × 2.7–3.5 µm) and smaller sized basidium (20–23 × 5–7 µm). Holotype:— INDIA. West Bengal: North-24- Parganas district, Barasat, Jagannathpur, near Kajibari bus stand, 22°44’50.9”N, 88°26’54.7”E, elev. 13.0 m, 21 August 2019, A.K. Dutta, AKD 54/2019 (GUBH 19922). Description:— Pileus 45–70 mm diam., convex, surface greyish brown (6E3), non-hygrophanous, unchanging on bruising, silky fibrillose, margin translucent striate; context 3–4 mm thick at the center, cream, unchanging on bruising. Lamellae 3–4 mm broad, free, close to crowded with 1–2 series of lamellulae, greyish white (8B1) when young, becoming greyish orange (6B3) when old, concolorous, margin serrated. Stipe 45–60 × 4–10 mm, central, cylindrical, mostly equal, sometimes slightly tapering towards apex, surface greyish white (8B1), fibrillose; context white to cream, solid. Volva 25–40 × 15–30 mm, free from the stipe, bilobed saccate, fleshy, surface greyish brown (6E3) at the outer side and greyish white (8B1) at the inner side, slightly fibrillose. Odour fungus like. Taste not recorded. Basidiospores (4.8–)5.0–5.2(–5.5) × (2.7–)3.0–3.2(–3.5) µm [X mr = 5.08–5.13 × 3.18–3.28, X mm = 5.10 ± 0.17 × 3.22 ± 0.23 μm, Q mr = 1.57–1.60, Q mm = 1.59 ± 0.09, n = 28 basidiospores per 2 specimens], ellipsoid, often 1–2 guttate, thin- to slightly thick-walled, smooth. Basidia 20–23 × 5–7 µm, clavate, hyaline, thin-walled, 4-spored, sterigmata ca. 2 µm long. Basidioles 14–18 × 3–6 μm, clavate, hyaline, thin-walled. Cheilocystidia 32–83 × 13–30 µm, crowded, clavate to ventricose lageniform, hyaline with KOH, thin-walled. Pleurocystidia 18.5–27.5 × 7–10 µm, abundant, variable in shape, ventricose acuminate to ventricose rostrate, broadly clavate to lageniform, hyaline with KOH, thinwalled. Lamellae trama hyphae 5–10 µm broad, hyaline with KOH, unbranched, thin-walled, often associated with oliferous hyphae, measuring 5–7 μm broad. Pileipellis a cutis-type, hyphae 8–18 µm broad, non-gelatinous, light brown with KOH, thin-walled. Pileus context hyphae 7.5–10 µm broad, often branched, hyaline with KOH, thinwalled. Stipitipellis a cutis-type, hyphae 63–175 × 20–38 µm, regular, cylindrical, hyaline to pale brown with KOH, unbranched, thin-walled. Stipe context hyphae 2.5–10 µm broad, regular, hyaline with KOH, unbranched, thin-walled. Volva composed of hyphae measuring 5–10 µm broad, closely packed, irregular, unbranched, light brown with KOH, thin-walled. Clamp-connection absent in all tissues. Ecology and distribution:—Solitary, scattered, on soil deposited in the base of a dicotyledonous tree. Known only from Eastern India. Additional specimen examined:— INDIA. West Bengal: North-24- Parganas district, Barasat, Jagannathpur, near Kajibari bus stand, 22°44’49.1”N, 88°26’56.9”E, elev. 15.0 m, 23 August 2019, A.K. Dutta, AKD 82/2019 (CUH AM778).Published as part of Chattopadhyay, Pinaki, Talukdar, Mousumi, Beypih, Jeswani, Tayung, Kumananda & Dutta, Arun Kumar, 2022, A new species of Volvariella (Agaricales, Basidiomycota) from West Bengal, India, pp. 36-48 in Phytotaxa 567 (1) on page 40, DOI: 10.11646/phytotaxa.567.1.3, http://zenodo.org/record/713797
On Subgraphs of Bounded Degeneracy in Hypergraphs
No full textInternational audienceA -uniform hypergraph has degeneracy bounded by if every induced subgraph has a vertex of degree at most . Given a -uniform hypergraph , we show there exists an induced subgraph of size at least , where and denotes the degree of vertex in the hypergraph . This extends and generalizes a result of Alon-Kahn-Seymour (Graphs and Combinatorics, 1987) for graphs, as well as a result of Dutta-Mubayi-Subramanian (SIAM Journal on Discrete Mathematics, 2012) for linear hypergraphs, to general -uniform hypergraphs. We also generalize the results of Srinivasan and Shachnai (SIAM Journal on Discrete Mathematics, 2004) from independent sets (0-degenerate subgraphs) to d-degenerate subgraphs. We further give a simple non-probabilistic proof of the Dutta-Mubayi-Subramanian bound for linear k-uniform hypergraphs, which extends the Alon-Kahn-Seymour (Graphs and Combinatorics, 1987) proof technique to hypergraphs. Our proof combines the random permutation technique of Bopanna-Caro-Wei (see e.g. The Probabilistic Method, N. Alon and J. H. Spencer; Dutta-Mubayi-Subramanian) and also Beame-Luby (SODA, 1990) together with a new local density argument which may be of independent interest. Our results also imply some results in discrete geometry, and we further address some natural algorithmic questions
Similarities between 2D and 3D convection for large Prandtl number
No full textUsing direct numerical simulations of Rayleigh-B\'enard convection (RBC), we perform a comparative study of the spectra and fluxes of energy and entropy for large and infinite Prandtl numbers in two (2D) and three (3D) dimensions. We observe close similarities between the 2D and 3D RBC, in particular the kinetic energy spectrum , and the entropy spectrum exhibits a dual branch with a dominant spectrum. We showed that the dominant Fourier modes in the 2D and 3D flows are very close
Vernacular names of the useful plants of northwest indian arid regions
No full textGupta Raj Kumar, Dutta B. K. Vernacular names of the useful plants of northwest indian arid regions. In: Journal d'agriculture tropicale et de botanique appliquée, vol. 14, n°10-11, Octobre-novembre 1967. pp. 402-453
Lepiota albofloccosa M. Ahamed, A. K. Dutta, K. Verma & Y. P. Sharma 2023, sp. nov.
No full text<i>Lepiota albofloccosa</i> M. Ahamed, A.K. Dutta, K. Verma & Y.P. Sharma <i>sp. nov.</i> Figures 3, 4. <p>MycoBank:—MB 847336</p> <p> Diagnosis:—Differs from all other species by its medium-sized basidiomata, snow-white pileus with smooth brownish yellow umbo and scaly to cottony surface covered with floccose velar remnants, pale yellowish stipe covered by floccose to fibrillose scales; fusiform to cylindrical, slightly thick-walled, dextrinoid basidiospores, a trichodermtype pileus covering composed of elongate, narrowly clavate to subcylindrical terminal hyphae, presence of clamp-connections in all tissues, and its occurrence on debris of <i>Picea smithiana</i> needles.</p> <p> Type:— India, Jammu and Kashmir: Doda district, Gandoh, Bhalessa, under <i>Picea simithiana</i> (Wall.) Boiss. at 33°01′02.9″N, 76°03′38.3″E, alt. 3142 m, 11 August 2022, <i>Masood Ahamed</i> and <i>Yash Pal Sharma</i>, holotype, GenBank: ITS-rDNA OP954870, LSU-rDNA OP954873, HBJU /M/1 (MAA-01).</p> <p> Etymology:—‘ <i>albofloccosa’</i> is derived from ‘ <i>albus’</i> meaning ‘white’, and ‘ <i>floccosus’</i>, meaning ‘with tufts of wool”, together referring to the white floccose pileus surface.</p> <p> Description: <i>—Basidiomata</i> medium sized. <i>Pileus</i> 31–75 mm diam., initially conical to sub globose, becoming applanate to plano-convex on maturity, distinctly umbonate; surface snow white (1A1) to milky white (1A1) with pale yellow to brownish yellow (3B3-B4) center, squamulose; squamules scaly and cottony, snow-white to milky white (1A1); margin with floccose velar remnants, undulate on maturity. <i>Lamellae</i> 3–5 mm wide, free, even, entire, close to rather crowded with 2–3 series of lamellulae, creamy white (1A1-A2), concolorous; edge. <i>Stipe</i> 115–145 × 7–9 mm, central, subcylindrical, slightly tapered towards the base; surface dry, dull, pale yellowish (1A3), unchanging on bruising, covered by white (1A1), floccose to fibrillose squamules that are scattered towards the base; context hollow, cream. <i>Annulus</i> rudimentary, floccose, white. <i>Odour</i> pleasant, mushroom-like. <i>Taste</i> not recorded. <i>Spore-print</i> white.</p> <p> <i>Basidiospores</i> [n= 60, 3 /2 collections] (11.5–)14.7–18.5(–21) × (5.5–)6.1-7.2(–8) μm, avl × avw = 16.59 × 6.63 μm, Q = 1.8–2.9, Qav = 2.51, fusiform to cylindrical with straight abaxial, ellipsoidal to oblong with acute apex side view, ellipsoid-ovoid in frontal view, smooth, hyaline, slightly thick-walled, dextrinoid, with 0–2 guttules. <i>Basidia</i> (26–)27–33(–36) × (11–)12–13(–13.5) μm, clavate to broadly clavate, hyaline in KOH, thin-walled, 2–4-spored. <i>Cheilocystidia</i> (20–)20–28.5(–39) × (8.5–)9–11.5(–12.5) µm, narrowly clavate to clavate, with olivaceous granular content, thin-walled. <i>Pleurocystidia</i> absent. <i>Pileus covering</i> a trichoderm, composed of elongate, narrowly clavate to subcylindrical terminal elements measuring (34.0‒)36.0‒148.0(‒185.0) × (5.5‒)6.5‒12.0(‒14.0) μm (n = 40, 4 of 2 coll.), with rounded apex or narrow and tapering to apex, sometimes more or less erect, occasionally curved or twisted, densely aggregated and branching, frequently septate, hyaline, thick-walled; with short elements in between, 12–32 × 11–40 μm, narrowly clavate, hyaline. <i>Stipitipellis</i> hyphae numerous, in clusters, (41.0‒)45.0‒70.5(‒95.0) × (4.0‒)5.0‒ 10.0(‒15.0) μm (n = 40 of 2 coll.) present only at base of stipe, absent towards the apex, very variable in shape, usually narrowly clavate to narrowly utriform, occasionally clavate, cylindrical, oblong, flexuose, hyaline, thin-walled. <i>Clamp connections</i> present and abundant in all examined tissues.</p> <p> Habit and habitat:—Solitary, caespitose, or gregarious, in small groups on the debris of needles of <i>Picea smithiana,</i> a typical tree species of the temperate forest Region of Bhaderwah forest division.</p> <p>Geographical distribution range:—Known only from the type locality in District Doda, Gandoh, Bhalessa, Jammu, and Kashmir, India.</p> <p> Additional collection examined:— INDIA. Jammu and Kashmir: Doda district, Gandoh, Bhalessa, Bash Galli, 32°2′36.48″N, 75°50′24.99″E, alt. 2830m, 25 August 2022, MAA02, <i>Masood Ahamed</i>, (HBJU / M/02).</p>Published as part of <i>Ahamed, Masood, Verma, Komal, Dutta, Arun Kumar & Sharma, Yash Pal, 2023, Lepiota albofloccosa, a new species in sect. Lepiota (Agaricaceae, Agaricales) from Northwestern Himalayas of Jammu and Kashmir, India, pp. 72-84 in Phytotaxa 607 (1)</i> on page 78, DOI: 10.11646/phytotaxa.607.1.6, <a href="http://zenodo.org/record/8212227">http://zenodo.org/record/8212227</a>
Synthesis, structure and redox properties of mixed ligand complexes of trivalent ruthenium with deprotonated 2-carbamoylpyridine derivatives and 2,2 '-bipyridine
No full textCopyright © 2001 Elsevier Science Ltd. All rights reserved.Sujit Dutta, Pabitra K. Bhattacharya and Edward R. T. Tiekinkhttp://www.elsevier.com/wps/find/journaldescription.cws_home/218/description#descriptio
On Subgraphs of Bounded Degeneracy in Hypergraphs
No full textInternational audienceA -uniform hypergraph has degeneracy bounded by if every induced subgraph has a vertex of degree at most . Given a -uniform hypergraph , we show there exists an induced subgraph of size at least , where and denotes the degree of vertex in the hypergraph . This extends and generalizes a result of Alon-Kahn-Seymour (Graphs and Combinatorics, 1987) for graphs, as well as a result of Dutta-Mubayi-Subramanian (SIAM Journal on Discrete Mathematics, 2012) for linear hypergraphs, to general -uniform hypergraphs. We also generalize the results of Srinivasan and Shachnai (SIAM Journal on Discrete Mathematics, 2004) from independent sets (0-degenerate subgraphs) to d-degenerate subgraphs. We further give a simple non-probabilistic proof of the Dutta-Mubayi-Subramanian bound for linear k-uniform hypergraphs, which extends the Alon-Kahn-Seymour (Graphs and Combinatorics, 1987) proof technique to hypergraphs. Our proof combines the random permutation technique of Bopanna-Caro-Wei (see e.g. The Probabilistic Method, N. Alon and J. H. Spencer; Dutta-Mubayi-Subramanian) and also Beame-Luby (SODA, 1990) together with a new local density argument which may be of independent interest. Our results also imply some results in discrete geometry, and we further address some natural algorithmic questions
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