743 research outputs found
Barilius kamjongensis Arunkumar & Thoibi & Jajo 2023, sp. n.
No full textBarilius kamjongensis sp. n. (fig. 1) urn:lsid:zoobank.org:act: 61794FCD-7D88-4B2E-B541-1B9CC4326D14 Material. Type. Holotype: 125/NH/ MUM, 27.II.2021, 24°86´N & 94°50´E, 101.1 mm SL, 111.7 mm TL, Taret-lok at Lunbung, Kamjong District, Manipur, India, Coll. Ersilia Jajo & her party. Paratypes: 125/NH/ MUM, 5 exs, 75.5–97.2 mm SL, 96.5–121.6 mm TL, data as for holotype. Diagnosis. Barilius kamjongensis sp. n. differs from its congeners based on the following combination of characters: presence of 2 pairs of barbels, 16–19 predorsal scales, 12–15 lateral body bars, inter-bars wider than bars, 40–43 perforated lateral line scales, 7.5/2.5 lateral line transverse scales, dorsal-fin without a distinct transverse blue-black band, origin of dorsal-fin closed to base of caudal-fin, not equidistant from the middle of eye and base of caudal-fin and far behind the vertical through the origin of pelvic-fin, pectoral-fin shorter than head length, pelvic-fin origin far in front of dorsal-fin origin, caudal-fin unequal lobes, body depth at dorsal-fin origin 22.8–26.6 % SL, caudal peduncle depth depth 8.5–10.3 % SL, predorsal length 55.8–57.7 % SL, head length 23.4–25.4 % SL, head length at occiput 12.5–18.4 % SL and 75.7–77.8 % HL, narrow head 10.4–12.7 % SL, eye diameter 6.4–7.9 % SL and 26.0–33.6 % HL respectively. See detailed comparison in the Discussion below. Description. Morphometric data are shown in table 1 and table 2. Body shape is shown in fig. 1. Body laterally compressed, ventral profile slightly rounded Post dorsal region in a slanted straight line. Head length usually longer and larger than head depth. Snout tip nearby blunt. Mouth gape below anterior margin of eye and mouth upturned, upper and lower jaws more or less same in length. Dentary tubercles of row developed and shown in fig. 2. Snout slightly longer than eye diameter. Inter-orbital region slightly convex. Nares located closed to eyes than tip of snout. Dorsal margin of eye never reaches to the dorsal profile of head and its lower margin never reaches to the level of angle of mouth. Origin of dorsal-fin closed to the base of caudal-fin, not equidistant from the middle of eye and base of caudal-fin but equal to the post-orbit and base of caudal-fin. Tip end of dorsal-fin straight, with posterior tip surpassing vertical through posterior base of anal-fin. Dorsalfin with ii, 7 rays. Pectoral-fin shorter than head length and often reaching base of pelvicfin. Pectoral-fin with i, 11 rays. Pelvic-fin origin far in front of dorsal-fin origin, its tip not reaching origin of anal-fin. Pelvic-fin with I, 7–8 rays Pectoral and pelvic-fins with lobate axial scales. Anal-fin originated far behind vertical through the last posterior origin of dorsal-fin ray with ii, 10 rays. Caudal-fin unequal, lower lobe longer than upper lobe and ii, 8+8. Ii rays. Circumpeduncular scales 14. Colouration. In fresh specimen, dorsal and dorso-lateral surfaces of head and body faintly greyish green, ventral portion anterior to pelvic-fin origin silver coloured. Belly creamy to light golden yellowish. Lateral body with 12–15 dark blue bars and not touched lateral line scales. Pectoral, pelvic and anal-fins are light orange in colour. Caudal-fin edge yellowish with blackish upper and lower lobe margins. Local Name. ‘Ngapaila’ in Tangkhul language and ‘Ngawa’ in Manipuri language. D i s t r i b u t i o n a n d h a b i t a t. Barilius kamjongensis sp. n. is presently known only the Taret-lok River, Kamjong District of Manipur (fig. 3–4). Taret-Lok River is originated from Nungshit-Haibi, then it joins the Nungjaopokpi River, southern part of Sita village, Tengnoupal District and flows through Tuyungbi at Yongkhun village which mainly dominated by Maring tribe and then joined to the Maklang River at Nambasi. There are three main hill streams of Nambasi viz., Lungbung, Kartangtak and Lungkuna which are the main hill stream fishing centres of the Taret-lok River of Kamjong District of Manipur. B. kamjongensis sp. n. is associated with the following fish species viz., Garna moyonkhulleni, Neolissochilus hexagonolepis, Poropuntius burtoni, Schistura reticulata, Glyptothorax chivomensis and Amblyceps sp. E t y m o l o g y. The species is named after the Kamjong District of Manipur from where it was collected.Published as part of Arunkumar, L., Thoibi, M. & Jajo, E., 2023, Barilius Kamjongensis, A New Bariliine Fish Species (Danionidae, Danioninae) From The Chindwin Basin Of Manipur, India, pp. 65-74 in Zoodiversity 57 (1) on pages 66-70, DOI: 10.15407/zoo2023.01.065, http://zenodo.org/record/784129
Solar distillation meets the real world: a review of solar stills purifying real wastewater and seawater
No full textSolar energy-driven evaporation-based freshwater production is one of the sustainable ways to purify contaminated/salty water. Recent advances in solar absorbers’ assemblies, design modifications, and integrations with heating sources improved the rate of freshwater productivity. However, the type of feed water affects the evaporation rate in a solar desalination system (SDS). Many studies used tap water with added contaminants to test the performance of a SDS and studied the water quality improvement. As a typical result, pH, total dissolved solids (TDS), and electrical conductivity (µS/cm) are reduced after solar evaporation. The performance of SDSs for real wastewaters are also important to understand, e.g., the reduction of high organic pollutants after solar evaporation. In this aspect, the main objective of the present work is to review solar distillation of real wastewaters and seawater by using SDSs. Further, the mechanism of a solar distiller with heat transfer principles, parameters affecting evaporation process, real wastewaters and seawaters purified in a solar distillation system, improvement of various parameters before and after solar evaporation, pathways of handling wastewaters, challenges, and future perspectives are discussed. Conclusively, SDSs are found to remove pollutants effectively after solar evaporation. The evaporation rate is relatively slower due to high concentration of pollutants that reduce vapor pressure. The COD removal of various real wastewaters, including sludge, kitchen, textile, palm oil, petroleum, water plant, and municipal wastewaters, was 98.13%, 97.85%, 96.84%, 96.71%, 87.99%, 86.99%, and 85.67%, respectively. The reduction rate of salt concentration in real seawater after evaporation in the solar distiller was 99.99%.11Nsciescopu
Screening of Pediocin Pa-1 Producing Lactic Acid Bacteria by Pcr
No full textThis Dissertation / Report is the outcome of investigation carried out by the creator(s) / author(s) at the department/division of Central Food Technological Research Institute (CFTRI), Mysore mentioned below in this page
De Novo Assembly and Transcriptome Analysis of the Mediterranean Fruit Fly Ceratitis capitata Early Embryos
No full textThe agricultural pest Ceratitis capitata, also known as the Mediterranean fruit fly or Medfly, belongs to the Tephritidae family, which includes a large number of other damaging pest species. The Medfly has been the first non-drosophilid fly species which has been genetically transformed paving the way for designing genetic-based pest control strategies. Furthermore, it is an experimentally tractable model, in which transient and transgene-mediated RNAi have been successfully used. We applied Illumina sequencing to total RNA preparations of 8-10 hours old embryos of C. capitata, This developmental window corresponds to the blastoderm cellularization stage. In summary, we assembled 42,614 transcripts which cluster in 26,319 unique transcripts of which 11,045 correspond to protein coding genes; we identified several hundreds of long ncRNAs; we found an enrichment of transcripts encoding RNA binding proteins among the highly expressed transcripts, such as CcTRA-2, known to be necessary to establish and, most likely, to maintain female sex of C. capitata. Our study is the first de novo assembly performed for Ceratitis capitata based on Illumina NGS technology during embryogenesis and it adds novel data to the previously published C. capitata EST databases. We expect that it will be useful for a variety of applications such as gene cloning and phylogenetic analyses, as well as to advance genetic research and biotechnological applications in the Medfly and other related Tephritidae
Impact of reactor environment on quenching heat transfer of accident tolerant fuel cladding
No full textThis electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.Thesis: S.M., Massachusetts Institute of Technology, Department of Nuclear Science and Engineering, 2018Cataloged from student-submitted PDF version of thesis. Page 123 blank.Includes bibliographical references (pages 106-116).Development of accident tolerant fuels (ATF) for light water reactors (LWRs) came into focus for the nuclear engineering community after the accidents at Fukushima-Daiichi. The primary focus of the ATF program is to identify alternative fuel and cladding technologies that may provide enhanced safety, competitiveness, and economics. The new fuel design must also be compatible with present-day LWR design. For near-term applications, coatings on the nominal Zirconium-based cladding material and other metallic materials are being considered to improve the corrosion resistance and reduce the generation of hydrogen at high temperatures. Major ATF coating choices under consideration include chromium as a coating, iron-chromium-aluminum alloys (FeCrAl) as cladding and molybdenum as a coating, which have demonstrated better mechanical and oxidation behavior during the experimental testing.Thermal-fluids characteristics are pivotal for a robust testing of ATF concepts as the proposed candidates may have an entirely different thermal-hydraulic behavior when compared to Zircaloy-4. ATF coatings may display very different boiling characteristics as a result of different microstructures and surface characteristics. In the present work, transient boiling heat transfer during quenching of the candidate ATF claddings on vertical rodlets is studied experimentally. The candidate ATF material (chromium, FeCrAl, and molybdenum) are applied on Zircaloy-4 rodlets. The vertical solid rodlets are heated to temperatures up to 1000 °C and are quenched in a saturated pool of water at atmospheric pressure. The temperature variation during the quenching of rodlets was recorded insitu with synchronized visualization of boiling regimes over the test specimen using a high-speed video camera.The quench performance of the ATF coatings was analyzed based on the examination of various surface parameters such as wettability, roughness, emissivity and capillary wicking. In order to obtain a more realistic picture of the candidate performance during the emergency cooling reflood phase in a nuclear reactor, the coated rodlets are also oxidized in an autoclave before quenching. The performance of the candidate claddings is evaluated after oxidation and the surface characterized. It was observed from the post-test analysis that the surface characteristics and oxidation had a significant impact on the quench performance of ATF coatings, which varied between different coating materials. In order to better understand the thermal margins in a reactor specific environment, an analysis was performed on samples after exposing them to gamma rays. The gamma rays tend to change the surface wettability through a phenomenon called Radiation Induced Surface Activation.A Gammacell 220E irradiator that uses 12 cobalt-60 pencil sources, arranged axially in a sample chamber at MIT, was used to irradiated the samples. The results of water quenching and contact angle studies showed a higher Leidenfrost temperature and wettability in both samples exposed to gamma irradiation. The detailed microscopic analysis attributed the enhanced wettability to oxidation of the surface under gamma irradiation.by Arunkumar Seshadri.S.M.S.M. Massachusetts Institute of Technology, Department of Nuclear Science and Engineerin
Stability of n-Dimensional Additive Functional Equation in Generalized 2-Normed Space
No full textIn this paper, the author established the general solution and generalized Ulam-Hyers-Rassias stability of n-dimensional additive functional equatio
Effective Conservation of Asian Rosewoods (<i>Dalbergias</i>) and Their Genetic Resources Through Regional Collaboration
No full textThe genus Dalbergia, comprising approximately 80 species in the Asia–Pacific region, includes valuable timber species known as Asian rosewoods. Highly prized for their dense, decorative wood, most of them face threats from overexploitation, illegal logging, and habitat loss, exacerbated by high market demand and slow growth rates. Conservation is complicated by cross-border distributions, regulatory variations, and the difficulty in distinguishing species, which prompted the inclusion of rosewoods in CITES Appendix II, with specific exemptions for D. sissoo. Regional collaboration is vital for conservation and sustainable use, leveraging advances in forest genetic resource research, such as diversity assessments, DNA barcoding, and genomic studies. Strategies include genetic conservation, capacity building, community engagement, and germplasm exchange. Challenges include uneven research capacities, regulatory hurdles, and tackling illegal trade. Strengthened partnerships, harmonised regulations, and sustainable management practices are essential to conserving Dalbergia species, ensuring their ecological and economic contributions across Asia.</p
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