203,823 research outputs found
Hydrothermal synthesis of Ni₃TeO₆ and Cu₃TeO₆ nanostructures for magnetic and photoconductivity applications
No full textAbstract
Despite great attention toward transition metal tellurates especially M₃TeO₆ (M = transition metal) in magnetoelectric applications, control on single phasic morphology-oriented growth of these tellurates at the nanoscale is still missing. Herein, a hydrothermal synthesis is performed to synthesize single-phased nanocrystals of two metal tellurates, i.e., Ni₃TeO₆ (NTO with average particle size ∼37 nm) and Cu₃TeO₆ (CTO ∼ 140 nm), using NaOH as an additive. This method favors the synthesis of pure NTO and CTO nanoparticles without the incorporation of Na at pH = 7 in MTO crystal structures such as Na₂M₂TeO₆, as it happens in conventional synthesis approaches such as solid-state reaction and/or coprecipitation. Systematic characterization techniques utilizing in-house and synchrotron-based characterization methods for the morphological, structural, electronic, magnetic, and photoconductivity properties of nanomaterials showed the absence of Na in individual particulate single-phase MTO nanocrystals. Prepared MTO nanocrystals also exhibit slightly higher antiferromagnetic interactions (e.g., TN-NTO = 57 K and TN-CTO = 68 K) compared to previously reported MTO single crystals. Interestingly, NTO and CTO show not only a semiconducting nature but also photoconductivity. The proposed design scheme opens the door to any metal tellurates for controllable synthesis toward different applications. Moreover, the photoconductivity results of MTO nanomaterials prepared serve as a preliminary proof of concept for potential application as photodetectors
Synidotea poorei Cai & Teo 2012, sp. nov.
No full text<i>Synidotea poorei</i> sp. nov. <p>Figures 1-4</p> <p> <i>Material examined</i>. Holotype: male, tl 11.4 mm, ZRC.2005.0118, North Pandan Buoy, 1°15'48.12" N, 103°45'10.81" E, Terumbu Pandan, Singapore, coll. Y. Cai, S. L. M. Teo, K. S. Tan and T. M. Sin, 11 Apr. 2002. Paratypes: 25 males, tl 4.6–12.2 mm, 15 females, tl 5.6-8.1 mm, ZRC.2005.0119, data same as holotype; 2 females, 7.4, 10.2 mm; 4 ovigerous females, tl 6.9-8.6 mm; 4 males, tl 10.2-12.9 mm, NVM J62812, data same as holotype.Other specimens: 4 males, tl 6.0- 9.1 mm, 2 females, tl 7.0- 7.4 mm, ZRC.2005.0120, North West Sudong Buoy, 1°13'07.22" N, 103°42'59.10" E, near Pulau Sudong, Singapore, 19 Jul. 2002; 1 female, tl 8.4 mm, ZRC.2005.0121, Perimbi Buoy, 1°25'45.11" N, 103°53'14.75" E, East Johor Strait, Singapore, coll. Y. Cai, 21 May 2002; 1 male, tl 12.0 mm, ZRC.2005.0122, Retan-D Buoy, 1°17'35.63" N, 103°45'25.48" E, off Sungei Pandan, West Coast, Singapore, coll. Y.Cai, K.S. Tan & S. C.Lim, 17 Oct.2003; 1 female,tl 5.9 mm, ZRC.2005.0123, Sirdhana Buoy, 1°14'43.00" N, 103°52'55.02" E, off Marina Bay, Singapore, coll. Y. Cai, K. S. Tan, T. M. Sin & S. L. M Teo, 5 Jun. 2002; 6 males, tl 6.2-10.8 mm, 1 female, tl 7.0 mm, ZRC.2005.0124, Mooring Buoys at Marina Bay, Singapore, 1°17'06.26" N, 103°51'20.09" E, coll. K. S. Tan & S. C. Lim, 14 Jul. 2003; 84 males, tl 6.8-13.2 mm, 54 females, tl 7.3-10.0 mm, ZRC.2005.0125, CAAS2 Buoy, 1°23'38.65" N, 103°59'37.13" E, off Changi Beach, Singapore, coll. Y. Cai, S. L. M. Teo & T. M. Sin, 23 Apr. 2002; 3 males, tl 4.8-10.3 mm, 1 female, tl 8.0 mm, ZRC.2005.0126, Jetty of St John’s Island, 1°13'20.95" N, 103°50'56.33" E, Singapore, coll. Y. Cai, 22 Mar. 2004.</p> <p> <i>Description of male</i>. Maximum size: 11.4 x 4.0 mm (holotype). Body 2.9–3.1 times as long as wide; depressed and smooth, without tubercles or carina, lateral margin smooth. Colour brownish with darker spots. Cephalon frontal margin almost straight, with indistinct median excavation, dorsal surface with anterior and posterior transverse grooves and longitudinal lateral grooves. Eyes bulge outward, forming part of contour of lateral margin of head. Ratio of post-orbital head width to width of pereonite 3 (widest pereonite) 0.56.</p> <p>Antenna 1 flagellum uniarticulate, with 10 pairs of jointed aesthetascs. Antenna 2 0.6 body length; article 4 2.4 times as long as wide; article 5 3.6 times as long as wide; flagellum with 16-22 articles, 1.2 length of peduncle.</p> <p>Dorsum of each pereonite smooth, margin slightly arched; dorsomarginal areas of pereonites 2–7 slightly enlarged, distinctly depressed, lateral margins slightly upturned, marginal areas becoming progressively less depressed, and sloping gently on posterior pereonites; lunettes on pereonites 2–4 with posterior margin subtriangular or rounded; distolateral angle of pereonites 1–4 rounded, those of pereonites 5–7 subrectangular.</p> <p>Pleotelson about 1.4 times as long as wide, dorsum smooth, evenly convex, lateral margin sub- parallel over anterior twothirds, then tapering beyond curved margin to rounded posterior margin, with a shallow medial excavation.</p> <p>Mandible incisor with 4 strong, unequal cusps. Lacinia mobilis stout, 4-cusped, with additional large serrate spine-like process. Molar process large, truncate, surrounded by short spines, bearing laterally 3 stiff setulose setae and many denticles along distal end.</p> <p>Mesial lobe of maxilla 1 with 2 stout distally serrated robust apical setae with mesial setules; outer lobe with 9 robust tooth-like serrated setae.</p> <p>Maxilla 2 3-lobed, with plumose, simple and comb setae on endopod as figured; mesial lobe of exopod lined with comb setae, Outer lobe enlarged, recurved laterally, fringed with extremely long plumose setae.</p> <p>Endite of maxilliped with 1 recurved coupling hook, lined with 7-10 apical moderately slender plumose setae. Palp 3-articulate, last article expanded and fringed with 6-10 long setae. Epipod laminar, distal margin rounded, outer and distal margin fringed with fine setae.</p> <p>Pereopod 1 carpus triangular, flexor margin densely lined with simple setae and denticles; propodus 1.9 times as long as greatest depth, tapering and curving distally, flexor margin with long simple setae; dactylus elongated, with simple setae.</p> <p>Pereopods 2-7 similar in form and size, slightly longer than pereopod 1; carpus subrectangular; flexor margins of ischium to propodus densely fringed with simple setae and pubescence; extensor margins of carpus and merus armed with 1 or 2 simple setae; dactylus more elongate and straighter than that of pereopod 1. Pereopod 2 propodus as long as merus and carpus together, 2.8 times as long as wide. Pereopod 4 propodus 2.4 times as long as wide. Pereopod 7 propodus 3.5 times as long as wide.</p> <p>Penes fused along entire length, 1.6 times as long as wide, swollen distally, with notched lateral and distal margins.</p> <p>Pleopods 1 and 2 with plumose marginal setae on endopods and exopods, both rami without sutures. Pleopods 1-3 with about 11, 5 and 3 coupling hooks on inner margin of peduncles respectively. Pleopod 2 with appendix masculina elongated, reaching beyond distal margin of endopod by one-sixth of its length, mostly straight, distal quarter slightly curving medisally, with numerous spinules distally. Pleopods 3-5 with few and short simple marginal setae, incomplete transverse suture present from near middle of the outer margin of exopod.</p> <p>Uropod 2.9 times as long as distal peduncle width, with short, simple setae, no oblique ridges on peduncle, distolateral angle with 3 plumose setae; endopod 0.3 length of peduncle, mesial length 0.7 proximal suture length, suture at 75° to long axis, distal margin truncate, at 75° to long axis, lateral margin gently convex between lateral and distal margins</p> <p> <i>Female</i>. Maximum size, 7.6 x 3.1 mm (one of paratypes). Body stouter than male, 2.3-2.6 times as long as wide; pleotelson 1.2 times as long as wide; pereonal margins more evenly curved than in male. Antenna 2 with 13-15 articled flagellum. Maxilla 2 3-lobed, with plumose, simple and comb setae on endopod as figured; both inner and outer lobes of exopod lined with comb setae; no dense pubescence on pereopods 2-7. Oostegites lamellar on pereonites 1-4.</p> <p> <i>Etymology</i>. The new species is named after Gary C. B. Poore, who has contributed significantly to our understanding of marine isopods in the Indo-Pacific region.</p> <p> <i>Habitats</i>. The new species was most commonly found in association with macroalgae and hydroids in the fouling community of Singapore waters.</p> <p> <i>Remarks.</i> Currently, 14 species of the genus <i>Synidotea</i> belong to the ‘ <i>S. hirtipes</i> group’, which was defined as a group of similar species characterized by a smooth body, entire or slightly excavate front of the head, and excavated pleotelson apex (Monod, 1931; Menzies and Miller, 1972; Poore, 1996). The group contains: <i>S. hirtipes</i> (Milne Edwards, 1840), <i>S. laevidorsalis</i> (Miers, 1881), <i>S. laticauda</i> Benedict, 1879, <i>S. harfordi</i> Benedict, 1879, <i>S. variegata</i>, Collinge, 1917, <i>S. marplatensis</i> Giambiagi, 1922, <i>S. fluviatilis</i> Pillai, 1954, <i>S. worlinensis</i> Joshi and Bal, 1959, <i>S. brunnea</i> Pires and Moreira, 1975, <i>S. hunumantharoei</i> Kumari and Shyamasundari, 1984, <i>S. keablei</i> Poore and Lew Ton, 1993, <i>S. grisea</i> Poore and Lew Ton, 1993, <i>S. oahu</i> Moore, 2004, and <i>S. fosteri</i> Schotte and Heard, 2004. Two more species, <i>S. innatans</i> and <i>S. karumba</i> from Australia, were just described and added into the group (Poore, 2012).</p> <p> <i>Synidotea poorei</i> sp. nov. can be separated from <i>S. hirtipes</i> easily by its smooth uropodal peduncle (vs. two ridges in <i>S. hirtipes</i>). The new species is superficially similar to <i>S. lavidorsalis</i>, <i>S. laticauda</i>, <i>S. grisea</i> and <i>S. keablei,</i> but it can be separated from these species by the sub-parallel lateral margin of the pleotelson. It also differs from <i>S. laevidorsalis</i> by the shape of uropodal endopod (fig. 3G vs. fig. 1f in Poore, 1996) and the fused penial plates (fig. 3H vs. fig. 1k in Poore, 1996); from S. <i>laticauda</i> by the less excavated posterior end of the pleotelson; and from <i>S. keablei</i> by sexual dimorphism of the maxilla 2, and the elongated pleotelson. <i>Synidotea poorei</i> sp. nov. can be distinguished from <i>S. harfordi</i> by the shape of the lunette on the pereonites 2-4 (rounded vs. triangular) and the overall body form, which is more slender in the latter. <i>Synidotea poorei</i> is also similar to <i>S. brunnea</i> from which it can be separated by the more elongated antennae 1 and 2, and the shape of uropodal endopod (fig 3G vs. fig. 38 in Pires & Moreira, 1975). <i>Synidotea poorei</i>, also resembles <i>S. variegata</i> (cf. Collinge, 1917; Pillai, 1963) from which it differs by the more stout peduncle of antenna 2 (fig 3 in Collinge, 1917 vs. fig. 2C), stouter pleotelson (1.3 times as long as wide in female and 1.5 times in male of <i>S. poorei</i> vs. 1.7 times in <i>S. variegata</i>); and the shallower pleonal suture. With respect to the body form, the cephalon and the pleotelson, <i>S. poorei</i> is very similar to the Argentinean species <i>S. marplatensis</i>. It can be separated by the much longer appendix masculina (Fig. 3C, D vs. Fig. 4 in Giambiagi, 1922); and the smooth uropodal peduncle (vs. with an oblique ridge). <i>Synidotea poorei</i> can also be easily separated from the two recently described species, <i>S. fosteri</i> and <i>S. oahu</i> by its much longer antenna 2, and the smooth uropodal endopod.</p>Published as part of <i>Cai, Yixiong & Teo, Serena L. M., 2012, Synidotea poorei, a new isopod from the fouling community in Singapore waters (Valvifera, Idoteidae), pp. 237-243 in Memoirs of Museum Victoria 69</i> on pages 237-238, DOI: 10.24199/j.mmv.2012.69.02, <a href="http://zenodo.org/record/8065086">http://zenodo.org/record/8065086</a>
Differences in category information processing between areas TEO and TE of the macaque
No full textCopyright \ua9 2025 Shimizu, Katakami, Okada, Sugase-Miyamoto, Hayashi, Matsuda, Miura, Eldridge, Saunders, Richmond and Matsumoto. Object categorization is a fundamental visual function, via which primates group items based on perceptual similarity. Neurons that respond to a class of complex objects, such as faces, can be found in inferior temporal cortex of macaque monkeys, comprising areas TEO and TE. The ability of monkeys to categorize cat/dog images is greatly impaired when both TE and TEO are removed, but is only modestly impaired if either region is left intact. This suggests that both TE and TEO can support object categorization. We investigated what differences exist in category information processing between areas TEO and TE. For cat and dog stimulus images, we found that category decoding performance increased during the initial phase of a stimulus presentation, then remained stable in area TEO for the duration of the presentation in a passive fixation task. In area TE, category decoding performance continued to improve into later in the time window than in TEO. Furthermore, we found that, after cat/dog category training, area TE neuronal populations encode cat and dog category information more strongly than do TEO neurons even in a fixation task (Mann-Whitney U-test, p < 0.05). Together, our results suggest that area TEO processes category information without changing its representation, whereas the category information representation in area TE evolves over time (both within a trial and across category training sessions), indicating that responses in TE may be influenced by top-down feedback
Myocardial grid-tagging is a superior predictor of myocardial viability than late gadolinium-enhanced magnetic resonance imaging post STEMI
No full textAbstract 520D. Wong, D. Leong, M. Weightman, M. Leung, J. Richardson, A. Bertaso, K. Teo, I. Meredith, M. Worthley, S. Worthle
Response of a TeO(2) bolometer to alpha particles
No full textTeO(2) crystals are used as bolometers in experiments searching for Double Beta Decay without emission of neutrinos. One of the most important issues in this extremely delicate kind of experiments is the characterization of the background. The knowledge of the response to a particles in the energy range where the signal is expected is therefore a must. In this paper we report the results on the response function of a TeO(2) bolometer to alpha's emitted by (147)Sm dissolved in the crystal at the growth phase. A Quenching Factor of (1.0076 +/- 0.0005) is found, independent of the temperature in the investigated range. The energy resolution on a peaks shows a standard calorimeter energy dependence: sigma[keV] = (0.56 +/- 0.02) circle plus (0.010 +/- 0.002) root E[keV]. Signal pulse shape shows no difference between alpha and beta/gamma particles
Dr. Duane M. Jackson, Morehouse College, July 2011
No full textThis video is a conversation with Dr. Duane M. Jackson. Dr. Jackson talks about his paper, "Recall and the Serial Position Effect: The Role of Primacy and Recency on Accounting Students' Performance." Jackie Daniel, AUC Woodruff Library, is the interviewer
Accretion disc winds imprint distinct signatures in the optical variability spectrum of black hole transients
No full textQuantifying the variability, measured as the root mean square (rms), of accreting systems as a function of energy is a powerful tool for constraining the physical properties of these objects. Here, we present the first application of this method to optical spectra of low-mass X-ray binaries. We use high-time-resolution data of the black hole transient V404 Cygni, obtained with the \textit{Gran Telescopio Canarias} during its 2015 outburst. During this event, conspicuous wind-related features, such as P-Cygni profiles, were detected in the flux spectra. We find that rms spectra are rich in spectral features, although they are typically morphologically different from their flux counterparts. Specifically, we typically observe absorption components in correspondence to the presence of emission lines in the flux spectra. Similarly, when analysing segments with significant variability in the optical flux, P-Cygni line profiles appear inverted in the rms spectra (i.e., enhanced variability in the blue-shifted region, accompanied by a decrease in that associated with the red component). We discuss the possible origin of these features, which resemble those found in other objects, such as active galactic nuclei. Finally, we highlight the potential of this technique for future searches for wind-type outflows in accreting compact objects
"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States" By M. Carey.
No full text"Reflections on the subject of Emigration from Europe with a view to Settlement in the United States: containing bried sketches of the moral and political character of those states.
By M. Carey, member of the American philosophical, and of the American Antiquarian Society, and author of The Olive Branch, Cindiciae Hibernicae, essays on banking, on political economy, and on internal improvement.
To which are now added the English editor's comments on the subject; together with Important Advice to Emigrants, and Cautions Against Impositions Practiced in the Outports
An ideal image: Effusive constrictive pericarditis
No full textShah M. Azarisman, James D. Richardson, S. K. Chua, Michael S. Cunningham, Karen S. Teo, Stephen G. Worthle
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