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  • 1
    Online Resource
    Online Resource
    Morphological and mitochondrial DNA variation revealed an undescribed lineage under the genus Sperata (Bagridae) in Bangladesh
    Wiley ; 2018
    In:  Acta Zoologica Vol. 99, No. 2 ( 2018-04), p. 177-187
    Details
    In: Acta Zoologica, Wiley, Vol. 99, No. 2 ( 2018-04), p. 177-187
    Abstract: Catfishes Sperata are popular, known for its taste and nutritional value, and are found naturally in wide variety of freshwaters in South Asia. The taxonomy of Sperata spp., sampled from Hakaluki Haor in Bangladesh, was re‐evaluated based on morphological variation and DNA barcoding. The collective variation in morphometric characters and mitochondrial DNA revealed an undescribed old and well‐separated lineage under the genus Sperata along with two previously known Sperata aor and Sperata seenghala in Bangladesh. Analyses of morphological traits suggested significant differentiation among Sperata species. The variation in mitochondrial DNA supported the distinct lineage and taxonomical discrimination. Sperata aor diverged earlier from the new lineage and Sperata seenghala with a divergence of 5.39 ( CI : 3.91–7.19) Mya ( PP   〉  90). Sperata seenghala and the new lineage shared a most recent common ancestry, which diverged from each other around 3.41 ( CI : 2.24–4.62) Mya ( PP   〉  90). Thus, the newly identified lineage could be a subspecies of S. seenghala or even a species under the genus Sperata . The information of the study will be useful for conservation, sustainable management and selective breeding of the putative species, including previously reported S .  aor and S. seenghala in Bangladesh.
    Type of Medium: Online Resource
    ISSN: 0001-7272 , 1463-6395
    URL: Issue
    URL: Article
    DOI: 10.1111/azo.2018.99.issue-2
    DOI: 10.1111/azo.12203
    RVK:
    WA 15000
    Language: English
    Publisher: Wiley
    Publication Date: 2018
    detail.hit.zdb_id: 2019873-5
    SSG: 12
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  • 2
    Online Resource
    Online Resource
    A theoretical investigation of erbium‐doped fiber laser as a function of ion‐clustering, temperature, pumping wavelength, and configuration
    Wiley ; 2020
    In:  Microwave and Optical Technology Letters Vol. 62, No. 2 ( 2020-02), p. 531-539
    Details
    In: Microwave and Optical Technology Letters, Wiley, Vol. 62, No. 2 ( 2020-02), p. 531-539
    Abstract: The lasing performance of an erbium‐doped fiber laser (EDFL) is affected by several factors such as doping concentrations, erbium‐ion clustering, pumping wavelength, pumping configuration, and temperature. In this article, the performance of an EDFL has been investigated as a function of erbium‐ion clustering, pumping wavelength, pumping configuration, and temperature. In our investigation, we have found that power degradation, which happens due to ion‐clustering, at around 1530 nm is less affected for 980 nm pumping than for 1480 nm pumping. Moreover, a wider tuning range is achieved for 980 nm pumping than 1480 nm pumping. Our simulation results also show that the forward pumping configuration is suitable for a wider tuning range. To our best knowledge, pumping wavelength and configuration effects on an EDFL performance have not been investigated yet. We have also investigated the temperature effects on an EDFL performance and found little influence on lasing performance, at least within 30°C to 80°C.
    Type of Medium: Online Resource
    ISSN: 0895-2477 , 1098-2760
    URL: Issue
    URL: Article
    DOI: 10.1002/mop.v62.2
    DOI: 10.1002/mop.32071
    Language: English
    Publisher: Wiley
    Publication Date: 2020
    detail.hit.zdb_id: 2000574-X
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  • 3
    Online Resource
    Online Resource
    The Assembly of the Mixture of Two Ionic Surfactants in Polyols Media at Variable Temperatures: Combined Conductivity and Theoretical Investigations
    Wiley ; 2022
    In:  Journal of Surfactants and Detergents Vol. 25, No. 1 ( 2022-01), p. 37-52
    Details
    In: Journal of Surfactants and Detergents, Wiley, Vol. 25, No. 1 ( 2022-01), p. 37-52
    Abstract: Herein, the aggregation phenomena of the two cationic amphiphiles, the hexadecyltrimethylammonium bromide (CTAB), and tetradecyltrimethylammonium bromide (TTAB), has been investigated in the presence of monosaccharide (glucose) and disaccharide (maltose) at varying compositions and temperatures. The critical micelle concentration ( cmc ), degree of ionization ( g ), and several thermodynamic properties have been estimated applying the conductivity measurement technique. To explore the consequence of additives on the mixed micellization of TTAB + CTAB, glucose as monosaccharide having two concentrations (1% & 5% ( w/w ) glucose) and maltose as disaccharide containing single concentration (1% ( w/w )) have been employed. Together with the mixture of TTAB and CTAB, investigation of the physicochemical parameters of pure amphiphiles in glucose and maltose solutions was quantified. The efficiency of the additives in depressing the cmc values followed the order: 1 ( w/w ) % maltose 〉 5 ( w/w ) % glucose 〉 1% ( w/w ) glucose. The ideal cmc ( cmc id ), activity coefficients, and β values suggested the synergistic attraction (attractive force) between these two surfactants. By utilizing the Rubingh model, the evaluated micellar mole fractions of CTAB ( α 1 ) coupled with the ideal mole fraction ( ) imply the increase of the contribution of CTAB in the mixed micellization with rising the α 1 values. The values of the negative excess free energy ( ) implied the stability of the mixed micelle formed. The changes in standard enthalpy (Δ H° m ) and changes in standard entropy ( ΔS° m ) of micellization reveal the presence of different modes of interactions like electrostatic, ion‐dipole, H‐bonding, and hydrophobic interactions among the studied components.
    Type of Medium: Online Resource
    ISSN: 1097-3958 , 1558-9293
    URL: Issue
    URL: Article
    DOI: 10.1002/jsde.v25.1
    DOI: 10.1002/jsde.12528
    Language: English
    Publisher: Wiley
    Publication Date: 2022
    detail.hit.zdb_id: 2109638-7
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  • 4
    Online Resource
    Online Resource
    Urban‐rural and sex differentials in tuberculosis mortality in Bangladesh: results from a population‐based survey
    Wiley ; 2019
    In:  Tropical Medicine & International Health Vol. 24, No. 1 ( 2019-01), p. 109-115
    Details
    In: Tropical Medicine & International Health, Wiley, Vol. 24, No. 1 ( 2019-01), p. 109-115
    Abstract: Evaluer la mortalité par la tuberculose (TB) au Bangladesh par le biais d'une enquête de population utilisant un outil d'autopsie verbale. Méthodes Enquête nationale sur la mortalité en utilisant l'outil d'Autopsie Verbale (AV) recommandé par l'OMS et en utilisant InsilicoVA, une méthode guidée par les données pour attribuer la cause du décès. En utilisant une méthode d’échantillonnage en grappes en trois étapes, 3.997 interviews d'AV ont été menées dans les zones urbaines et rurales du Bangladesh. Les fractions de mortalité par cause (FMC) ont été estimées à l'aide de modèles probabilistes bayésiens. Résultats 6,8% des décès totaux dans la population étaient dus à la TB (IC95%: 5,1‐8,9), comprenant 12,0% (IC95%: 11,1‐12,8) et 6,42% (IC95%: 5,4–7,3) des décès totaux d'hommes et de femmes, respectivement. Cette proportion était plus élevée chez les adultes âgés de 15 à 49 ans [12,2% (IC95%: 9,4–14,6)]. La population urbaine est plus susceptible de mourir de TB et les hommes en zone urbaine ont la plus haute FMC [13,6% (IC95%: 9,1‐16,9)] . Conclusion Nos résultats montrent que la TB est la cinquième cause majeure de décès dans la population générale et le sexe et le lieu de résidence (urbain/rural) ont un effet significatif sur la mortalité par TB au Bangladesh. Les causes sous‐jacentes des taux plus élevés de décès liés à la TB dans les zones urbaines, en particulier chez les hommes des zones urbaines, qui ont de meilleures connaissances et un taux de scolarisation plus élevé dans le programme DOTS, devraient être explorées.
    Type of Medium: Online Resource
    ISSN: 1360-2276 , 1365-3156
    URL: Issue
    URL: Article
    DOI: 10.1111/tmi.2019.24.issue-1
    DOI: 10.1111/tmi.13171
    Language: English
    Publisher: Wiley
    Publication Date: 2019
    detail.hit.zdb_id: 2018112-7
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