91,806 research outputs found
Parapalicus clinodentatus Castro 2000
No full text<i>Parapalicus clinodentatus</i> Castro, 2000 <p> <i>Parapalicus clinodentatus</i> Castro, 2000: 495, 587, 588, figs 18, 19c, 57.</p> <p> MATERIAL EXAMINED. — <b>Tonga.</b> BORDAU 2, stn CP 1511, 21°08’S, 175°22’W, 384-402 m, 31. V.2000, 1 ♂ (MNHN-B 31951). — Stn CP 1541, 21°15’S, 175°14’W, 319-333 m, 5. VI.2000, 2 ovig. ♀♀ (MNHN-B 31952). — Stn CP 1641, 21°09’S, 175°22’W, 395 m, 21. VI.2000, 8 ♂♂, 1 ♀ (MNHN-B 31953).</p> <p>DISTRIBUTION. — Vanuatu (type locality), New Caledonia, Fiji (Castro 2000: table 6, fig. 57) and now Tonga. Depth: 282-950 m (Castro 2000: table 5).</p>Published as part of <i>Castro, Peter, 2010, A new species and new records of palicoid crabs (Crustacea, Decapoda, Brachyura, Palicoidea, Palicidae, Crossotonotidae) from the Indo-West Pacific region, pp. 73-86 in Zoosystema 32 (1)</i> on page 82, DOI: 10.5252/z2010n1a3, <a href="http://zenodo.org/record/4520863">http://zenodo.org/record/4520863</a>
Rectopalicus amphiceros Castro 2000
No full textRectopalicus amphiceros Castro, 2000 Rectopalicus amphiceros Castro, 2000: 358, 587, 588, fig. 35. MATERIAL EXAMINED. — Philippines. PANGLAO 2004, Bohol I., Panglao I., stn T 1, Bolod, 09°32.382’N, 123°47.262’E, 83-102 m, 30. V.2004, 1 ♀, cl 4.4 mm, cw 4.6 mm (ZRC 2008.1085). DISTRIBUTION. — New Caledonia (type locality) and now from the Philippines (Castro 2000: table 6). Depth: 83-110 m (Castro 2000: table 5). REMARKS Rectopalicus amphiceros was described from one male and one pre-adult female.The discovery of an adult female, slightly smaller than the male holotype, now permits the description of some features of adult females. The female specimen unfortunately lacks the abdomen. The carapace and pereopods of the adult female (ZRC 2008.1) are as in the holotype male (Castro 2000: fig. 35a-c) and pre-adult female paratype. The vulvae are relatively large, round, with simple margins, and on thoracic sternite 6. They are displaced to the median plate of the sternum. The sternothoracic cavity is typical of adult female palicids, being very broad and extending to just below the posterior margin of the third maxillipeds.Published as part of Castro, Peter, 2010, A new species and new records of palicoid crabs (Crustacea, Decapoda, Brachyura, Palicoidea, Palicidae, Crossotonotidae) from the Indo-West Pacific region, pp. 73-86 in Zoosystema 32 (1) on pages 83-84, DOI: 10.5252/z2010n1a3, http://zenodo.org/record/452086
Computational studies on mercury halides as ligands in organometallic transition complexes
No full textMercury is present in the structure of several heterometallic clusters, usually bridging three or four transition metal centres.1 Heterobimetallic compounds with a single M-Hg bond were prepared in the past, and the simpliest situation is represented by the {HgX} fragment (X = halide or pseudohalide) bonded to a transition metal fragment. Compounds of this type can be obtained following different synthetic approaches, such as the reaction of HgX2 with suitable precursors or the insertion of Hg in a M-X bond. The most common transition metals belong to the Groups 6 - 9, with CO, cyclopentadienide (Cp) and related species as ancillary ligands. Selected examples are the complexes [M(HgX)(Cp)(CO)3] (M = Cr, Mo, W), [M(HgX)(CO)5], (M = Mn, Re), [Fe(HgX)(Cp)(CO)2] and [Co(HgX)(CO)4].2
To the best of our knowledge, the nature of the M-Hg bond was never computationally investigated. In this communication we report the outcomes of DFT calculations on model compounds having general formulae [M(HgX)(Cp)(CO)n] (M = Cr, Mo, W, n = 3; M = Fe, Ru, Os, n = 2; X = Cl, Br, I) and [M(HgX)(CO)n] (M = Mn, Tc, Re, n = 5; M = Co, Rh, Ir, n = 4; X = Cl, Br, I). The nature of the M-Hg bond, the factors affecting the bond strength and the behaviour of {HgX} as Lewis acid or base were studied in detail.
1 E. Rosenberg, K. I. Hardcastle, Comprehensive Organometallic Chemistry II, vol. 10 (1995) 323.
2 S. V. Maslennikov et al., Russ. J. Gen. Chem. 72 (2002) 1495; J. Granifo and M. E. Vargas, J. Organomet. Chem. 408 (1991) 357; M. Cano and J. A. Campo, Polyhedron 10 (1991) 133; R. Kumar et al., J. Organomet. Chem. 323 (1987) 53; J. R. Chipperfield et al., J. Chem. Soc. Dalton Trans. (1977) 485 and references therein
A sinfonia do sagrado em Castro Alves: (Deus, Eros e mãe em Os escravos)
No full textTese (doutorado) - Universidade Federal de Santa Catarina, Centro de Comunicação e Expressão. Programa de Pós-Graduação em Literatura.No presente trabalho realiza-se uma leitura intertextual entre a Bíblia e Os escravos, coletânea de poemas de teor abolicionista do poeta romântico Antônio Frederico de Castro Alves (1847-1871), objetivando demonstrar que os textos poéticos arquitetam-se na desconstrução e reconstrução dos textos bíblicos. A leitura dos poemas centra-se nos personagens: Deus, Eros e Mãe, os quais conformam uma trindade poética/sagrada. A pesquisa divide-se em três movimentos: Prelúdios do sagrado no Romantismo, Tríade melódica e À guisa de coda: trindade poética. No primeiro efetuam-se algumas aproximações ao conceito do sagrado e aos Romantismos francês e brasileiro. O seguinte corresponde à leitura das composições, através das linhas melódicas: A dualidade de Deus, A ambivalência de Eros e O duplo calvário da Mãe escrava. E no último movimento amalgamam-se as inter-relações entre a trindade cristã e poética e os dramas bíblico e poético
Chnoodes unimaculata Krüger, Castro-Guedes & Almeida, 2016, sp. nov.
No full textChnoodes unimaculata sp. nov. (Figure 8) Material examined. BRAZIL: Amapá: “Oiapoque/Amapá - Brasil / V. 1959 /M. Alvarenga col.”, “Ex-Coleção/M. Alvarenga”, [DZUP 188165] “ HOLOTYPE [female]/ Chnoodes unimaculata Krüger, Castro-Guedes & Almeida, 2015 ” [red label]; “ Brasil - Amapá/Macapá/ 16.III. 2004 /J. F. F. Martins, [DZUP 186838] “ PARATYPE [female]/ Chnoodes unimaculata Krüger, Castro-Guedes & Almeida, 2015 ” [yellow label]. Holotype. Female. Length 3.16 mm, width 2.40 mm. Body round, with sparse yellowish pubescence. Pronotum black, with yellowish lateral border. Elytra black with one elongated yellowish spot on disc (Figs 8 A–D). Head, antennae and mouthparts dark yellowish. Meso- and metasternum dark brown or black; legs yellowish; epipleuron with black spots; first ventrites black (Fig. 8 B). Genitalia with genital plates triangular, elongated, styli with setae (Fig. 8 E). Spermatheca C-shaped, apex short and rounded (Fig. 8 F). Male. Unknown. Etymology. The name of this species refers to the single spot on each elytron. Geographical Distribution. Brazil (AP). Remarks. Chnoodes unimaculata sp. nov. (Fig. 8) resembles C. machadoi sp. nov. (Fig. 7), but is clearly distinguished by the color, shape and number of spots on the elytra; it also differs in the shape of the female genitalia.Published as part of Krüger, Thaysa C., Castro-Guedes, Camila F. & Almeida, Lúcia M., 2016, Two new species of Chnoodes Chevrolat (Coleoptera: Coccinellidae) from Brazil, pp. 269-283 in Zootaxa 4078 (1) on pages 281-282, DOI: 10.11646/zootaxa.4078.1.24, http://zenodo.org/record/26066
Major and trace elements, Sr-Nd-Pb isotope data of lavas from D. João de Castro seamount, Azores
No full textThe D. João de Castro seamount is located on the ultraslow diverging Terceira Rift, Azores. D. João de Castro is a young central volcano (<0.5 Ma) with recent volcanic and hydrothermal activity. The central volcano is located on a volcanically active fissure zone where two volcanic ridges extent rift-parallel from the edifice. Submarine lava samples and volcanic glasses were taken from D. João de Castro volcano and the adjacent submarine volcanic ridges (N and NW Castro Ridges). Samples range from the uppermost flanks at ~300 m water depth to ~1350 m water depth at the NW and N Castro Ridges. Samples were taken by TV-guided grab (GEOMAR Helmholtz-Zentrum für Ozeanforschung) and with a Remotely Operated Vehicle (ROV MARUM Quest 4000) during cruises M113 and M128 with the German research vessel R/V Meteor in 2015 and 2016, respectively. Major element concentrations of all lavas were analyzed in order to estimate the compositional variability of the edifice and the volcanic ridges. Trace element and Sr-Nd-Pb isotopes analyses where then carried out on selected lavas to reconstruct the mantle source signatures and the conditions of melting under which lavas from D. João de Castro formed. The sampling of these volcanic formations was designed to improve our understanding of how central volcanoes are formed in oceanic rift systems
Carcinoplax uncinata Castro 2009, n. sp.
No full textCarcinoplax uncinata n. sp. (Fig. 1) TYPE MATERIAL. — New Caledonia. LAGON NORD, stn 500, 19°04’S, 163°30’E, 225 m, 4.III.1985, ♂ holotype, cl 6.5 mm, cw 8.4 mm (MNHN-B 30809). — Grand Récif Sud, stn 387, 22°39’S, 167°07’E, 225 m, 22.I.1985, 1 ♀ paratype, cl 6.5 mm, cw 8.5 mm (MNHN-B 30829). Solomon Is. SALOMON 1, stn CP 1849, north of San Cristobal I., 10°28.2’S, 161°59.3’E, 230 m, 6.X.2001, 1 ♀ paratype, cl 10.2 mm (MNHN-B 30810). BATHUS 2, stn DW 715, 22°39.42’S, 167°26.84’E, 202-277 m, 10.V.1993, 1 ♀ paratype, cl 7.7 mm, cw 10.0 mm (MNHN-B30838).— Stn DW 726, 22°47.30’S, 167°28.74’E, 241-260 m, 12. V.1993,1 ♂ paratype, cl 5.6 mm, cw 6.8 mm; 1 ♀ paratype, cl 7.0 mm, cw 9.4 mm (ZRC 2008.1337). TYPE LOCALITY. — Off the north coast of New Caledonia, 19°10’S, 163°35’E, 225 m. OTHER MATERIAL EXAMINED. — New Caledonia. LAGON NORD, stn 516, 19°10’S, 163°35’E, 48 m, 5.III.1985, 1 ♀, cl 6.9 mm, cw 9.1 mm (MNHN-B 30830). MUSORSTOM 5, stn 335, 20°03.24’S, 153°45.35’E, 315 m, 15.X.1986, 1 ♂, cl 6.1 mm, cw 7.7 mm (MNHN-B30831). — Stn 346, 19°39.77’S, 158°27.07’E, 245- 252 m, 17.X.1986, 1 pre-adult ♀, cl 5.6 mm, cw 7.4 mm,? 1 pre-adult cl 3.1 mm, cw 3.8 mm (MNHN-B30832). — Stn 348, 19°36.00’S, 158°31.70’E, 260 m, 17.X.1986, 1 ♀, cl 6.9 mm, cw 8.9 mm (MNHN-B30833). — Stn 377, 19°48.60’S, 150°29.10’E, 260-270 m, 20.X.1986, 1 ♀, cl 6.9 mm, cw 8.9 mm (MNHN-B30834). BATHUS 2, stn DW 715, 22°39.42’S, 167°26.84’E, 202-277 m, 10.V.1993, 2 ♀♀, cl 7.1 mm, cw 9.1, cl 6.4 mm, cw 7.7 mm (MNHN-B30837).— Stn DW 726, 22°47.30’S, 167°28.74’E, 241-260 m, 12.V.1993, 1 ♂, cl 5.0 mm, cw 5.8 mm (MNHN-B30790). — Stn DW 727, 22°48.03’S, 167°29.03’E, 299-302 m, 12.V.1993, 1 ♀, cl 5.9 mm, cw 7.4, 1 pre-adult ♀, cl 5.0 mm, cw 6.2 mm (MNHN-B30835). —? Stn DW 723, 22°50.21’S, 167°26.84’E, 430-433 m, 11.V.1993, 1 pre-adult ♀, cl 4.1 mm, cw 5.1 mm (MNHN-B30836). ETYMOLOGY. — From uncus, Latin for “hook”, for the diagnostic shape of the first anterolateral teeth, which are separated from the outer orbital teeth by a deep, narrow, J-shaped gap. DISTRIBUTION. — Western Pacific Ocean: Solomon Is and New Caledonia. Depth: 202-315 m. One specimen was collected from 48 m close to the type locality; a pre-adult of questionable identification from 430-433 m. DESCRIPTION Carapace (Fig. 1A) quadrate, slightly wider than long (1.3 as wide as long in male holotype). Carapace slightly convex, without clear indication of regions; dorsal surface smooth, microscopically granular (small granules along anterolateral borders in largest female paratype; MNHN-B30810); slight depression across cardiac region, slight elevations on each branchial region, giving appearance of 2 transversal carinae across carapace. Front lamellar, straight, not marked by median notch. Slight notch between front, inner edge of supraorbital border. Supraorbital borders sinuous, without notches (slight median notch in largest female paratype; MNHN-B30810), borders microscopically granular. Suborbital borders granular, each with short, blunt inner tooth not visible dorsally. Outer orbital angle with broad, rounded, anteriorly projecting, slightly asymmetrical, smooth tooth; deep, narrow, J-shaped gap between outer orbital, first anterolateral tooth; 2 smooth anterolateral teeth on each side of carapace; first (anteriormost) anterolateral tooth curved, hook-like, with variously acute tip, slightly dorsally projecting; second (posteriormost) anterolateral tooth triangular, with acute tip, dorsally projecting; margin between anterolateral teeth nearly straight, granular. Posterolateral borders slightly arched. Posterior margin slightly arched, slightly longer than front, with scattered, short plumose setae. Subhepatic, pterygostomial regions, pterygostomial crest slightly granular (larger granules in largest female paratype; MNHN-B30810). Third maxillipeds completely close buccal cavern; merus auricular. Anterior border of endostome well demarcated from buccal cavern, ridges faint but clearly defined. Particularly short tomentum on surface of thorax, abdomen (absent in largest female paratype); plumose setae along outer margin of thorax. Eye peduncles (Fig. 1A) short (0.1 front width), dorsal surface granular, cornea slightly expanded distally. Orbits narrow, not expanded distally. Chelipeds (P1) nearly equal in both males (right slightly thicker in holotype; Fig. 1A) and females, much thicker propodus in males; fingers slender in females, much longer than propodus (stouter in males), with blunt teeth, one-third to one-half distal portion of fingers dark brown. Outer surface with microscopic granules; few simple setae on carpus, patch of short plumose setae on inner (ventral) margin of propodus (absent in largest female paratype). Broad, curved, acute-tipped tooth on inner (ventral), proximal margin of carpus. Ambulatory legs (P2-P5) relatively short, distal end of P5 merus just reaching second anterolateral tooth when folded, articles unarmed; long as well as short, simple setae along margins of articles; long, simple setae along inner margin of P5 propodus. P5 dactylus long, slender, unarmed; length of P5 merus 0.4 cl. Median sulcus present on thoracic sternites 7-8; sutures 4/5, 5/6, 6/7, 7/8 medially interrupted (Fig. 2E). Male abdomen (Fig. 1B) narrowly triangular, with 6 freely-movable somites plus telson; telson slightly longer than wide. Abdominal-locking mechanism with medium-size button on edge of thoracic sternite 5 pairing with shallow socket on underside (ventral surface) of abdominal somite 6. Somite 3 covers space between P5 coxae, episternite 7, outer edge of somite not fitting under episternite; somites 1, 2 as wide as somite 3, thoracic sternite 8 not visible when abdomen closed. Penis emerging from coxal gonopore, protected by episternite 7. G1 (Fig. 1C) long, slender, dorsoventrally flattened, straight, only slightly broadened proximally, small denticles on distal portion; truncated apex with slightly pointed outer margin. G2 (Fig. 1D) slender, not as long as G1, slightly curved flagellum slightly shorter than proximal part (peduncle), apex with 2 lateral spinules. Female abdomen wide, fringed by long, plumose setae. Telson wider than long. Somites 2, 3 cover space between P5 coxae, small portion of thoracic sternite 8 visible when abdomen closed. Vulva of mature female (Fig. 2E) large, oblong, much expanded, extending from close to deflected suture 5/6 to close to deflected suture 6/7; membrane covers aperture, leaving narrow space open along anterior margin, sternal vulvar cover absent. REMARKS The new species shows all of the characters that are diagnostic of the 18 previously described species of Carcinoplax, most importantly the presence of a long, slender, dorsoventrally flattened G1 with a thin, truncated apex, a particularly large vulva that extends from suture 5/6 to suture 6/7, and which is covered by a soft membrane and not by a sternal vulvar cover (see Castro 2007: 623). Among its congeners, it is closest to C. specularis Rathbun, 1914, in the overall appearance of the carapace (see Guinot 1989: pl. 8, figs A, B; pl. 9, figs D, E, as C. verdensis Rathbun, 1914; pl. 8, figs E, F, as C. polita Guinot, 1989), the G1 and G2 (see Guinot 1989: fig. 34; fig. 37, as C. polita Guinot, 1989), and, in most specimens, the presence of a short tomentum on the surface of the thorax and abdomen. In C. uncinata n. sp., however, the outer orbital teeth are larger and with a more prominent anterior margin than in C. specularis, and there is a narrow, J-shaped gap between the outer orbital and the first anterolateral tooth, which is curved and hook-like. This is in contrast to C. specularis, where there is a wider, U-shaped gap between the outer orbital and first anterolateral teeth, and the tip of the first anterolateral tooth is not as anteriorly advanced as in C. uncinata, and hence not noticeably hook-shaped (see Guinot 1989: fig. 25; fig. 22, as C. verdensis; fig 24, as C. polita). There is also a patch of short plumose setae on the inner (ventral) margin of the cheliped propodus of C. uncinata n. sp. (but absent in the largest female paratype; MNHN-B30810), which is absent in C. specularis, and the cheliped fingers of females are visibly more slender in C. uncinata n. sp. than in C. specularis. The general structure of the carapace (except the diagnostic shape of the outer orbital and anterolateral teeth), G1, G2, and vulva of the new species can be observed in other species of Carcinoplax, but there are important differences when contrasted with congeners. In C. abyssicola (Miers, 1886), the outer orbital margin is flat, nearly horizontal, and posteriorly inclined (see Miers 1886: pl. 19, fig. 2; Guinot 1989: fig. 38, pl. 9, figs A, B). In C. cracens Castro, 2007, the walking legs are much longer and slender than in the new species (see Castro 2007: fig. 3), a difference that also applies to C. longipes (Wood-Mason, 1891). In C. inaequalis (Yokoya, 1933), there are two conspicuous, wide horizontal ridges on the dorsal surface of carapace, the outer orbital teeth are only slightly inclined dorsally, and the anterolateral teeth are more straight and slender than in the new species. These characters are unfortunately not apparent in Yokoya’s figure (Yokoya 1933: fig. 63) but are distinctively shown in the type material (see Castro 2007: 633). There is some variation in the shape of the anterolateral teeth among individuals of the new species. The first and second teeth can be obtuse in some specimens but usually on only one side, the teeth on the opposite side being acute as in most specimens. Carcinoplax uncinata n. sp. appears to be a smallsize species, the largest of the 18 specimens examined being a female with a carapace length of only 10.2 mm (MNHN-B30810). In contrast, large-size species such as C. longimana (de Haan, 1833), carapace length may reach well over 50 mm (Guinot 1989). The new species raises the number of described species of Carcinoplax, the largest genus of the family Goneplacidae, to 19.Published as part of Castro, Peter, 2009, Two new species of Carcinoplax H. Milne Edwards, 1852, and Pycnoplax Castro, 2007, from the western Pacific, and a description of the female of Thyraplax truncata Castro, 2007 (Crustacea, Decapoda, Brachyura, Goneplacidae), pp. 949-957 in Zoosystema 31 (4) on pages 950-952, DOI: 10.5252/z2009n4a9, http://zenodo.org/record/452058
Informetrics on M. N. Srinivas
No full textM. N. Srinivas, the well known sociologist is widely recognised as architect of modern Indian sociology and social anthropology. His publications have been analysed by year, domain, authorship pattern, channels of communication used. Keywords, etc. The results indicate that the papers published by him are of a nature that qualify him to be a 'role model' for the younger generations to emulate.
By the end of 1995, Srinivas had to his credit 144 papers which, included 33 broad papers in sociology and anthropology; 18 papers in social change; 28 papers in village studies; 12 papers on religion; 17 papers on caste and 36 papers of general popular interest. The periods 1958-61 and 1974-77, when Srinivas was 38-41 and 58-61 years old. were his most productive periods with highest publication activity
A experiência com o soneto na poética de E. M. de Melo e Castro / Experience with the Sonnet in E. M. de Melo e Castro’s Poetry
No full textResumo: A poética de E. M. de Melo e Castro, um dos maiores representantes da Poesia Experimental em Portugal, fundamenta-se num jogo constante com as linguagens disponíveis, da escrita à imagética, da escrita enquanto imagem, da imagem enquanto inscrição. O objetivo desta reflexão é procurar compreender a postura do poeta perante a tradição partindo de suas experimentações em torno do soneto e de sua busca pelo que chamou “poligonia total da experimentação poética”. Para isso, recorreremos à obra Poligonia do soneto (1963) e a textos teóricos e reflexivos do autor, além de outras leituras críticas.Palavras-chave: soneto; poesia experimental portuguesa; tradição; forma.Abstract: The poetics of E. M. de Melo e Castro, one of the greatest representatives of Experimental Poetry in Portugal, is based on a constant game with the available languages, from writing to imagery, from writing as image, from image as inscription. The purpose of this reflection is to seek to understand the poet’s attitude towards tradition based on his experiments on the sonnet and on his search for what he called “the total polygon of poetic experimentation”. For this, we will use the work Poligonia do soneto (1963) and the author’s theoretical and reflective texts, as well as other critical readings.Keywords: sonnet; Portuguese experimental poetry; tradition; form
The local adsorption geometry of benzenethiolate on Cu(1 0 0)
No full textThe local adsorption geometry of benzenethiolate in the ordered c(2 × 6) phase on Cu(1 0 0) has been investigated by a combination of S K-edge near-edge X-ray absorption fine structure (NEXAFS), normal incidence X-ray standing waves (NIXSW) and S 1s scanned-energy mode photoelectron diffraction (PhD). NEXAFS and PhD show that the molecular plane is tilted from the surface normal by 20 ± 15°, while NIXSW clearly identifies the S head-group as occupying the four-fold coordinated hollow sites. PhD shows the S atoms lies 1.34 ± 0.04 Å above the outermost Cu atomic layer, leading to a Cu–S bondlength of 2.25 ± 0.02 Å. The combination of the PhD and NIXSW results shows the Cu surface layer has an outward relaxation of 0.15 ± 0.06 Å. Possible origins for this large adsorbate-induced relaxation are discussed
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