325,578 research outputs found
Sclerothyone adinopoda Thandar & Arumugam 2022, comb. nov.
No full textSclerothyone adinopoda (Pawson & Miller, 1981) comb. nov. Arumugam’s (2011) re-assignment of Thyone adinopoda Pawson & Miller, 1981, to Sclerothyone, on the current senior author’s advice, was not questioned by Martins & Tavares (2019) and hence it is now formally included in Sclerothyone although it has scattered podia.Published as part of Thandar, A. S. & Arumugam, P., 2022, Referral of Thyone neofusus Deichmann, 1941, Thyone adinopoda (Pawson & Miller, 1981 and Havelockia obunca (Lampert, 1885) to the genus Sclerothyone Thandar, 1990, and a replacement name for the preoccupied genus Neothyone Deichmann, 1941 (Echinodermata: Holothuroidea: Dendrochirotida), pp. 65-71 in Zootaxa 5219 (1) on page 66, DOI: 10.11646/zootaxa.5219.1.3, http://zenodo.org/record/740812
Dataset supporting the publication "Solution-processed flexible thermoelectric nanocomposites based on P3HT/tellurium nanowires for smart applications" by S. Arumugam et al
No full textDataset supporting the publication "Solution-processed flexible thermoelectric nanocomposites based on P3HT/tellurium nanowires for smart applications" by S. Arumugam et al (2023) published in Synthetic Metals issn 0379-6779.
In this work, we fabricate a novel type of thermoelectric composite by mixing high-mobility poly(3,4-ethylene dioxythiophene), P3HT with tellurium nanowires (TeNW) and newly synthesized three different (S2-, SET and SPh) sulfur-contained tellurium nanowires. The advantage of the presence of sulfur in the hybrid film is to prevent aggregation and the ability to dissolve in polar solvents. The thermoelectric properties are investigated by varying the loading of tellurium nanowires into the polymer matrix. The spin coating method is used to fabricate the thermoelectric devices on Quartz substrates. We achieved a maximum power of 47.7μW/mk2, the highest reported for tellurium/P3HT nanowire composites. The results of this study also indicate that the doping of P3HT increases the thermoelectric properties of hybrid composites. The thickness of the hybrid thin films was investigated using SEM images.
Related projects:
EP/T027711/1 - Flexible Hybrid Thermoelectric Materials
The DOI for this data will become available once the paper has been published by Synthetic Metals issn 0379-6779
</span
Sclerothyone obunca Thandar & Arumugam 2022, comb. nov.
No full textSclerothyone obunca (Lampert, 1885) comb. nov. Another species considered by Arumugam (2011) as belonging to Sclerothyone is Havelockia obunca (Lampert, 1885). Lampert placed this species in Cucumaria but provided a rather vague description without even mentioning the number of specimens he had examined. He described the holotype as 30 mm long and the calcareous ring as 3 mm high, but illustrated only a single ossicle, presumably from the body wall. Mitsukuri (1912) described two specimens from Asamushi (Japan), which he claimed to belong to Cucumaria obunca (Lampert, 1885), but neither described nor illustrated the calcareous ring or any ossicles. Long after Östergren’s death, Heding (in Östergren et al., 1938) compiled Östergren’s incomplete works, in which he presented an illustration of the calcareous ring and ossicles of this species but without a description or any locality or other data. We, therefore, opine that the illustration was from Östergren’s incomplete work on this species, presumably from the type material from the Copenhagen/Stuttagart Museums (as there were only two records of the species to that date [that of Lampert (1885) and Mitsukuri (1912)]. According to the curator at the Copenhagen Museum (pers. comm.), the holotype of C. obunca appears to be lost and attempts to locate it at other museums were unsuccessful. Mitsukuri (1912) dubiously assigned two of his specimens to this species, but without illustrations, but attempts to locate these specimens also proved unsuccessful. Mitsukuri (1912) stated that in some respects his specimens resembled Cucumaria chronhjelmi Théel, 1886 but with which Deichmann (1938) disagreed and described Mitsukuri’s (not Théel’s C. chronhjelmi) as Eupentacta pseudoquinquesemita ? with some doubt, while designating Selenka’s (1867) Cucumaria quinquesemita as type species of her new genus Eupentacta (accessed WoRMS, October 2022). She, further, declared that both species are North-East Pacific in distribution, perhaps extending to Japan. In addition, Deichmann (1938) stated that Selenka’s record of E. quinquesemita from South Carolina, proved on examination to be referable to Pentamera pulcherrima (Ayres), thus clearing up a puzzling distribution range. Panning (1949), in his revision of the Cucumariidae, transferred Lampert’s C. obunca to Pentathyone after synonymizing the latter with Havelockia. Thus, this species currently remains in Havelockia (WoRMS, accessed October 2022), despite the fact that the tube feet are restricted to the ambulacra. Hence, this species, on the basis of Martin & Tavares’ amendment of the diagnosis of the family, is now also transferred to Sclerothyone, despite the presence of shorter posterior processes to the radial plates (Figure 1F). It perhaps belongs to a new genus within the Sclerothyonidae, but because of its restriction of the podia to the ambulacra and the resemblance of its ossicles to those of other species of Sclerothyone, it is here also referred to this genus. Despite the presence of 2-pillared tables in the body wall (Figure 1G) and introvert (Fig. 1I), S. obunca differs from other species within Sclerothyone in possessing peculiar, elongated tables in the tentacles (Fig. 1H). Another specimen collected from the type locality in 1896 and identified as Pentathyone obunca (Lampert) (USNM 30629), appears to have dried up prior to preservation, with the internal anatomy difficult to discern and the body wall and tube feet ossicles corroded. However, its tube feet are not restricted to the ambulacra. Therefore, whether this specimen is really S. obunca or another species is open to question.Published as part of Thandar, A. S. & Arumugam, P., 2022, Referral of Thyone neofusus Deichmann, 1941, Thyone adinopoda (Pawson & Miller, 1981 and Havelockia obunca (Lampert, 1885) to the genus Sclerothyone Thandar, 1990, and a replacement name for the preoccupied genus Neothyone Deichmann, 1941 (Echinodermata: Holothuroidea: Dendrochirotida), pp. 65-71 in Zootaxa 5219 (1) on page 68, DOI: 10.11646/zootaxa.5219.1.3, http://zenodo.org/record/740812
Sclerothyone neofusus Thandar & Arumugam 2022, comb. nov.
No full textSclerothyone neofusus (Deichmann, 1941) comb. nov. Although the holotype is now devoid of the calcareous ring and ossicles, perhaps completely decalcified, a dissected paratype demonstrated a well-developed calcareous ring (Figure 1A) typical of the Sclerothyonidae and the body wall ossicles (Figure 1B) as delicate 2-pillared tables but on their way to corrosion. The paratype corresponds well with Deichmann’s (1941) description of the species except that the pedicel ossicles are badly affected and appear as corroded rods (?plates) with central and terminal perforations (Figure 1C). The tentacle ossicles comprise slender, curved, perforated rods (Figure 1D) and open rosettes (Figure 1E). No ossicles were detected in the introvert. From this we conclude that the calcareous ring and ossicles of the examined paratype are close to the type species of Sclerothyone [(i.e. S. velligera (Ludwig & Heding, 1935)] and also closely resemble those of S. unicolumnus Thandar, 2006. However, Martins and Tavares (2019) opined that Thyone neofusus may belong in Temparena (also in Sclerothyoninae), rather than in Sclerothyone, as they mistook the plate-like ossicles illustrated by Deichmann (1941), to have also come from the body wall. This observation is erroneous because of misinterpretation of Deichmann’s (1941) figure legend. It is here noted that the so-called plates are actually supporting plates, labelled as such in Deichmann’s legend, while in the description she herself stated that the plates may be reduced tables from the tube feet. However, it is noteworthy that Deichmann mentioned only rosettes in the introvert, but her figure clearly illustrates a “disc of table from introvert”. This may perhaps be contamination from another preparation. Hence, Deichmann’s description of the introvert deposits require clarification from a study of more material.Published as part of Thandar, A. S. & Arumugam, P., 2022, Referral of Thyone neofusus Deichmann, 1941, Thyone adinopoda (Pawson & Miller, 1981 and Havelockia obunca (Lampert, 1885) to the genus Sclerothyone Thandar, 1990, and a replacement name for the preoccupied genus Neothyone Deichmann, 1941 (Echinodermata: Holothuroidea: Dendrochirotida), pp. 65-71 in Zootaxa 5219 (1) on page 66, DOI: 10.11646/zootaxa.5219.1.3, http://zenodo.org/record/740812
Cucumellidae Thandar & Arumugam 2011
No full textFamily Cucumellidae Thandar & Arumugam, 2011 Diagnosis (from Thandar & Arumugam 2011, amended herein). Dendrochirotid holothuroids with about 12 tentacles, digitate, unbranched. Calcareous ring simple, without posterior bifurcation of the radial plates; test absent; body wall ossicles non-contiguous, comprising simple tables with mostly trilocular to multilocular smooth disc, with a solid or 3-pillared spire ending in 2–3 (sometimes 4), smooth or toothed processes. Remarks. In the diagnosis of their new family, the authors state that the spire of the table ends in 2–3 smooth, diverging processes. Ludwig & Heding’s description of the tables is not clear and no tables could be found in the still extant holotype. However, in the current specimens it appears that C. triplex, the type species, has a spire ending in 3-, sometimes 4-toothed processes. The diagnosis is, therefore, here amended to include this feature.Published as part of Thandar, Ahmed S., 2018, On some miscellaneous sea cucumbers (Echinodermata: Holothuroidea) in the collections of the South African Museum with three new species, pp. 57-85 in Zootaxa 4532 (1) on page 73, DOI: 10.11646/zootaxa.4532.1.3, http://zenodo.org/record/261502
On some rhopalodinid sea cucumbers in the collections of the Natural History Museum, U. K. (Echinodermata: Holothuroidea: Dactylochirotida)
No full textThandar, Ahmed S., Arumugam, Preyan (2011): On some rhopalodinid sea cucumbers in the collections of the Natural History Museum, U. K. (Echinodermata: Holothuroidea: Dactylochirotida). Zootaxa 2982: 49-58, DOI: 10.5281/zenodo.20505
Rholpalodina cabrinovici Thandar & Arumugam, 2011, n. sp.
No full textRholpalodina cabrinovici n. sp. Figures 2, 4 A–C Diagnosis. Proboscis and sphere clearly demarcated; reaching approximately 50 mm in total length. Tentacle about 20 in two circles of five large and 15 smaller ones of varying size inside these. Body wall deposits of sphere and proboscis comprise a superficial layer of tables lying outside a layer of large, smooth multilocular, imbricating plates plus other smaller, also multilocular plates interspersed amongst them. Table discs cup-shaped with the rim denticulate and turned up to give to some tables a cup and saucer appearance in lateral view; spire of moderate height, of four pillars, a single cross bar, terminating in a rather ill-defined crown. Material examined. Holotype, NHM, 1914.12.23.4/ 5, Lagos, Nigeria, J. Cadman Esq., paratype, same data as holotype., 1 spec. Etymology. This species is named after Mr. Andrew Cabrinovic of the Natural History Museum, U.K., to acknowledge his logistic support whenever the senior author visited this institution. Description of holotype. Proboscis and sphere clearly demarcated, without one merging imperceptibly into the other. Holotype, larger of the two specimens, 49 mm in length (proboscis 27 mm, sphere 22 mm), diameter of proboscis 5 mm proximally, 3 mm distally, diameter of sphere 14 mm. Colour, in alcohol, proboscis creamish, sphere creamish-grey proximally, uniformly creamish at base. Tube feet very reduced, in two zigzag rows per ambulacrum, extending to the tip of sphere with mid-ventral ambulacrum crossing pole of the sphere. Mouth and anus set very close together, difficult to distinguish, the latter surrounded by anal papillae. Tentacles about 20, in two circles of five large elongated ones plus about 15 smaller ones of varying size; branches much reduced. Proboscis rigid, sphere not as soft as in other rhopalodinids. Both sphere and proboscis rough to the touch due to the presence of tables superficial to the large imbricating plates whose free ends are directed anterioriad with the perforations so aligned to give the impression of some sort of regular sculpturing on the surface. Calcareous ring well calcified (Figure 4 A); radial plates broad, especially proximally with several anterior subdivisions and a slight posterior bifurcation; interradial plates smaller, triangular, broader proximally and narrower distally, with/without posterior indentation. Polian vesicle single; stone canal short, madreporite minute, beanshaped. Each respiratory tree subdivided into two well developed branches of which one is longer and attached to body wall. Gonad (ovary) much branched, full of developing or developed eggs, with the longer branch of the right respiratory tree intermingled with it. Tables present in both proboscis and sphere lying outside a single layer of multilocular plates. Table discs of proboscis of moderate size (70–109 µm, mean 90.3 µm, ± 13.83, n = 4) (Figure 2 B), usually rounded with denticulate/spinose margins, turned up to give a saucer-like appearance, with four central holes and several smaller marginal holes in one or two series, rarely the central holes larger than the rest; spire low to moderate, terminating in a rather ill-defined crown; some tables reduced to form fenestrated spheres but these are rare. Discs of the tables of the sphere of similar size (74–119.5 µm, mean 97.5 µm, ± 14.12, n = 10) and form (Figure 2 D). Plates of the proboscis and sphere imbricating, of various form, circular, oval to elongate, of two distinct sizes, larger plates multilocular with the holes so arranged as to give the skin a characteristic sculpturing-like appearance in surface view. Larger plates of proboscis (1291–1449 µm, mean 1361.6 µm, ± 152.16, n = 10) (Figure 2 A) with several series of holes; smaller plates (142–270 µm, mean 225.4 µm, ± 43.93, n = 5). Plates of sphere also of two sizes, larger plates (670–1000 µm, mean 891.5 µm, ± 109.27, n = 10) with an irregular margin and often with an indentation for the passage of the tube foot where these are present (Figure 2 E). Small plates (217–518 µm, mean 386.6 µm, ± 101.27, n = 5) fewer, with fewer holes and uneven margins, dominant at pole of sphere (Figure 2 C). Tube feet rods of two types, those that are plate-like, multilocular with an elongated portion held at an angle to the main body of the plate and other rods typically of rhopalodinid type, that is curved with/without marginal projections but often with one or more perforations (Figure 4 B). Tentacle ossicles delicate, comprising rods of varying size and form, no two exactly identical but usually of two types, large ones sparingly perforated with spiny and/or irregular margins, the other curved with one or more marginal projections and terminal holes, resembling such rods of the tube feet. Paratype not dissected (Figure 4 C), 45 mm in length (proboscis 21 mm, sphere 24 mm); midventral ambulacrum not clearly discernable at pole of sphere. Remarks. It is with some hesitation that we describe the two NHM specimens as a new species as they strongly resemble R. pachyderma Panning, 1932. However, they differ from it in their body form and the reduced denticulations of the table discs and the crowns of the spires. In Panning’s (1932, 1935) drawing of the body form of his species there is no sharp delimitation between the proboscis and the sphere, one is seen to imperceptibly merge into the other. This shape was verified in the type material of R. pachyderma received from the Hamburg Museum. According to Cherbonnier (1958, 1965) his specimens have the same body form as that described for the species by Panning. It is unfortunate that neither Cherbonnier nor Panning, who made in total four descriptions of this species, illustrate the plates of the body wall nor comment on the presence of the smaller plates interspersed between the larger ones, although such plates are present in the type of R. pachyderma we examined. We also failed to find large plates of about 2 mm long as recorded by Panning (1935). For comparative purposes we present here a table (Table 1) comparing the size of the plates of the type recorded by Panning (1935), that of the type measured by us, and those of our new species. Unfortunately, Cherbonnier does not give any measurements of the plates of his specimens. Cherbonnier records the presence of about 20 tentacles in his 1958 material of R. pachyderma and 25 in his 1965 material. Panning (1932, 1935), on the other hand, makes no mention of the tentacle number of his species.Published as part of Thandar, Ahmed S. & Arumugam, Preyan, 2011, On some rhopalodinid sea cucumbers in the collections of the Natural History Museum, U. K. (Echinodermata: Holothuroidea: Dactylochirotida), pp. 49-58 in Zootaxa 2982 on pages 52-54, DOI: 10.5281/zenodo.20505
Data for 'Encapsulated Textile Organic Solar Cells Fabricated by Spray Coating'
No full textThis data supports the paper Li, Y., Arumugam, S., Krishnan, C., Charlton, M., & Beeby, S. (2018). Encapsulated Textile Organic Solar Cells Fabricated by Spray Coating.
Solution based processes such as screen printing and spray coating are established processes for fabricating organic solar cells (OSCs) on flexible polymer substrates. However, realizing a flexible solar cell on a textile substrate remains a significant challenge due to the properties of the textile itself, which can present an absorbent, rough and fibrous surface. The textile also limits processing temperatures which can reduce functional materials performance. In this work, we demonstrate an optimized fabrication approach using entirely spray coating to fabricate textile OSCs with a power conversion efficiency (PCE) of 0.4 %. An interface layer is first deposited on the standard woven textile that forms a smooth supporting layer for the subsequent spray coated functional layers. A top encapsulation layer is deposited on top of the fabricated textile OSCs, which improves the durability and life time of the OSCs is evidenced by cyclic bending test.</span
Min-Max Dom-Saturation Number of a Tree
Full text linkIn this paper we present a dynamic programming algorithm for determining the min-max domsaturation number of a tree
Referral of Thyone neofusus Deichmann, 1941, Thyone adinopoda (Pawson & Miller, 1981 and Havelockia obunca (Lampert, 1885) to the genus Sclerothyone Thandar, 1990, and a replacement name for the preoccupied genus Neothyone Deichmann, 1941 (Echinodermata: Holothuroidea: Dendrochirotida)
No full textThandar, A. S., Arumugam, P. (2022): Referral of Thyone neofusus Deichmann, 1941, Thyone adinopoda (Pawson & Miller, 1981 and Havelockia obunca (Lampert, 1885) to the genus Sclerothyone Thandar, 1990, and a replacement name for the preoccupied genus Neothyone Deichmann, 1941 (Echinodermata: Holothuroidea: Dendrochirotida). Zootaxa 5219 (1): 65-71, DOI: https://doi.org/10.11646/zootaxa.5219.1.
- …
