Institution
Sabaragamuwa University
Education•Ratnapura, Sri Lanka•
About: Sabaragamuwa University is a education organization based out in Ratnapura, Sri Lanka. It is known for research contribution in the topics: Agriculture & Tourism. The organization has 586 authors who have published 738 publications receiving 5756 citations.
Papers published on a yearly basis
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Nalin N. Wijayawardene, Kevin D. Hyde1, L. K. T. Al-Ani2, L. K. T. Al-Ani3 +160 more•Institutions (74)
TL;DR: This article provides an outline of the classification of the kingdom Fungi (including fossil fungi), and treats 19 phyla of fungi, including all currently described orders of fungi.
Abstract: This article provides an outline of the classification of the kingdom Fungi (including fossil fungi. i.e. dispersed spores, mycelia, sporophores, mycorrhizas). We treat 19 phyla of fungi. These are Aphelidiomycota, Ascomycota, Basidiobolomycota, Basidiomycota, Blastocladiomycota, Calcarisporiellomycota, Caulochytriomycota, Chytridiomycota, Entomophthoromycota, Entorrhizomycota, Glomeromycota, Kickxellomycota, Monoblepharomycota, Mortierellomycota, Mucoromycota, Neocallimastigomycota, Olpidiomycota, Rozellomycota and Zoopagomycota. The placement of all fungal genera is provided at the class-, order- and family-level. The described number of species per genus is also given. Notes are provided of taxa for which recent changes or disagreements have been presented. Fungus-like taxa that were traditionally treated as fungi are also incorporated in this outline (i.e. Eumycetozoa, Dictyosteliomycetes, Ceratiomyxomycetes and Myxomycetes). Four new taxa are introduced: Amblyosporida ord. nov. Neopereziida ord. nov. and Ovavesiculida ord. nov. in Rozellomycota, and Protosporangiaceae fam. nov. in Dictyosteliomycetes. Two different classifications (in outline section and in discussion) are provided for Glomeromycota and Leotiomycetes based on recent studies. The phylogenetic reconstruction of a four-gene dataset (18S and 28S rRNA, RPB1, RPB2) of 433 taxa is presented, including all currently described orders of fungi.
381 citations
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TL;DR: Particulate plastics made of synthetic polymers, their origin, and characteristics are described with emphasis on how particulate plastics and associated toxic trace elements contaminate terrestrial and aquatic ecosystems.
298 citations
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TL;DR: The results indicate that singlet-triplet exciton annihilation is a possible intrinsic mechanism causing lasing death and this work achieves stable green quasi-2D perovskite lasers under CW optical pumping in air at room temperature.
Abstract: Organic–inorganic lead halide quasi-two-dimensional (2D) perovskites are promising gain media for lasing applications because of their low cost, tunable colour, excellent stability and solution processability1–3. Optically pumped continuous-wave (CW) lasing is highly desired for practical applications in high-density integrated optoelectronics devices and constitutes a key step towards electrically pumped lasers4–6. However, CW lasing has not yet been realized at room temperature because of the ‘lasing death’ phenomenon (the abrupt termination of lasing under CW optical pumping), the cause of which remains unknown. Here we study lead halide-based quasi-2D perovskite films with different organic cations and observe that long-lived triplet excitons considerably impede population inversion during amplified spontaneous emission and optically pumped pulsed and CW lasing. Our results indicate that singlet–triplet exciton annihilation is a possible intrinsic mechanism causing lasing death. By using a distributed-feedback cavity with a high quality factor and applying triplet management strategies, we achieve stable green quasi-2D perovskite lasers under CW optical pumping in air at room temperature. We expect that our findings will pave the way to the realization of future current-injection perovskite lasers. Lead halide-based quasi-two-dimensional perovskite films with different organic cations are used to create stable green lasers under continuous-wave optical pumping in air at room temperature.
293 citations
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TL;DR: In this article, the authors measured denudation and erosion rates in Sri Lanka using cosmogenic nuclides in the steep, humid, tropical highlands of Sri Lanka.
Abstract: [1] Some of the lowest weathering and erosion rates in any mountain range in the world have been measured using cosmogenic nuclides in the steep, humid, tropical highlands of Sri Lanka. The total preanthropogenic denudation rates were measured in creek sediments and soil samples from unperturbed rain forest sites, bedrock from mountain crests, and bedrock from inselbergs. Denudation rates are in the range of 5–30 t km−2 yr−1 (2–11 mm ky−1). These rates average denudation over the last 50–250 ky. Weathering exports in rivers draining the mountainous Central Highlands show that silicate weathering rates are also low, varying from 5 to 20 t km−2 yr−1 today (2–7 mm ky−1), but they represent a significant fraction of the total denudation. All these observations run contrary to the conventional geomorphologic and geochemical wisdom that would predict rapid erosion for highlands of high relief, temperatures, and precipitation. We speculate that the high relief in Sri Lanka represents the remnant of a geomorphic block that was uplifted during rifting at 130 Ma or even earlier and that was reduced to the interior of the island by rapid receding of escarpments after continental breakup. It is possible that throughout this history, hillslopes, where not exposing bare bedrock, were protected by thick weathered profiles. Such clay-rich layers would inhibit silicate weathering by shielding bedrock from weathering agents. In the absence of landscape rejuvenation, physical erosion rates are low, and fresh mineral surfaces are not being supplied. The observation that wet, steep, tropical highlands can have low rates of rock weathering and erosion has some potentially profound implications for the long-term controls of atmospheric CO2 budgets: High temperature and precipitation, which are much invoked though controversial agents for silicate dissolution and CO2 drawdown, become ineffective in promoting weathering in areas that are not tectonically active.
231 citations
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Cooperative Research Centre1, University of Newcastle2, Foshan University3, University of New South Wales4, Tsinghua University5, University of Wollongong6, Nanjing Agricultural University7, Sejong University8, Hanyang University9, Kansas State University10, National University of Singapore11, Hong Kong Polytechnic University12, Korea University13, Sabaragamuwa University14, University of Wuppertal15, Kafrelsheikh University16, King Abdulaziz University17, Lancaster University18, University of Auckland19, University of Sri Jayewardenepura20, Egyptian Petroleum Research Institute21
TL;DR: Biochar is produced as a charred material with high surface area and abundant functional groups by pyrolysis, which refers to the process of thermochemical decomposition of organic material at elev...
Abstract: Biochar is produced as a charred material with high surface area and abundant functional groups by pyrolysis, which refers to the process of thermochemical decomposition of organic material at elev...
204 citations
Authors
Showing all 602 results
Name | H-index | Papers | Citations |
---|---|---|---|
Atula S. D. Sandanayaka | 42 | 130 | 5049 |
Rohana Chandrajith | 28 | 129 | 2710 |
Anil Gunaratne | 18 | 44 | 966 |
Hasintha Wijesekara | 15 | 35 | 600 |
Mahinda Senevirathne | 14 | 27 | 802 |
Sivapalan Achchuthan | 13 | 48 | 467 |
Wahala M.P.B. Wahala | 12 | 20 | 1688 |
Saranga Diyabalanage | 12 | 20 | 341 |
Enoka P. Kudavidanage | 11 | 21 | 1280 |
Tilak Hewawasam | 10 | 18 | 680 |
A.S. Karunaratne | 9 | 30 | 260 |
A.W. Wijeratne | 9 | 30 | 196 |
Udeni Jayalal | 8 | 32 | 218 |
R. K. Mutucumarana | 8 | 12 | 194 |
H.A. Darshanee Ruwandeepika | 8 | 8 | 285 |