145,470 research outputs found
P. J. De Castro Nery, A evoluçao do pensamento antigo
No full textAlvares Cabral. J. M. P. J. De Castro Nery, A evoluçao do pensamento antigo. In: Revue néo-scolastique de philosophie. 41ᵉ année, Deuxième série, n°57, 1938. pp. 170-171
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
MARTINEZ CASTRO, J. (Col.)
No full textCorrespondence of Col. J. Martínez Castro, Head of the National Corps of Invalids, Interim President Adolfo de la Huerta, and Gen. Alvaro Obregón in which Col. Martinez Castro requests Gen. Obregón to intercede with the Secretariat of War and Navy and Mr. De la Huerta so that they change the name of the Army Commanders Battalion to its former name of National Corps of Invalids; congratulations to Gen. Obregón on his arrival to Mexico City. Thank you response. Col. J. Martínez Castro requests Gen. Obregón that Mrs. Aurelia García de Luján be granted a pension for the death of her husband, 1st Capt. Victor Luján. Response indicating that she should address this petition to the Secretariat of War and Navy. Col. Martínez de Castro sends to Gen. Obregón a poem titled "The Invalids" that was recited by Professor F. de Lara during the visit that he made to the National Corps of Invalids; he also requests Gen .Obregón to supply them with necessary equipment and asks for the payment of full salaries to the National Corps of Invalids; he informs Gen. Obregón that they have been stationed in the garrison at Plaza of Mexico. File M-21 / Correspondencia entre el Corl. J. Martínez Castro, Jefe del Cuerpo Nacional de Inválidos, el Presidente Interino Adolfo de la Huerta y el Gral. Alvaro Obregón, en la que el primero solicita al Gral. Obregón interceda ante la Secretaría de Guerra y Marina y el Sr. De la Huerta para que cambie el nombre de Batallón de Conserjes del Ejército a su antigua denominaciónde Cuerpo Nacional de Inválidos; felicita al Gral. Obregón por su arribo a la ciudad de México. Respuesta de agradecimiento. El Corl. J. Martínez Castro recomienda con el Gral. Obregón a la Sra. Aurelia García Vda. de Luján para que le sea concedida la pensión por la muerte de su esposo el Cap. 1º Víctor Luján. Respuesta indicando que debe dirigirse a la Secretaría de Guerra y Marina. El Corl. Martínez de Castro envía al Gral. Obregón una poesía titulada "Los Inválidos" que recitó el Prof. F. de Lara en la visita que hiciera al Cuerpo Nacional de Inválidos; solicita al Gral. Obregón les suministre un equipo reglamentario y le pide se paguen al Cuerpo Nacional de Inválidos sus haberes íntegros; le informa que han sido acuartelados en la Guarnición de la Plaza de México. Exp. M-2
Evidence for the decay B0→J/ψω and measurement of the relative branching fractions of meson decays to J/ψη and J/ψη′
Get PDFFirst evidence of the B 0 → J / ψ ω decay is found and the B s 0 → J / ψ η and B s 0 → J / ψ η ′ decays are studied using a dataset corresponding to an integrated luminosity of 1.0 fb -1 collected by the LHCb experiment in proton-proton collisions at a centre-of-mass energy of sqrt(s) = 7 TeV. The branching fractions of these decays are measured relative to that of the B 0 → J / ψ ρ 0 decay:frac(B (B 0 → J / ψ ω), B (B 0 → J / ψ ρ 0)) = 0.89 ± 0.19 (stat) - 0.13 + 0.07 (syst),frac(B (B s 0 → J / ψ η), B (B 0 → J / ψ ρ 0)) = 14.0 ± 1.2 (stat) - 1.5 + 1.1 (syst) - 1.0 + 1.1 (frac(f d, f s)),frac(B (B s 0 → J / ψ η ′), B (B 0 → J / ψ ρ 0)) = 12.7 ± 1.1 (stat) - 1.3 + 0.5 (syst) - 0.9 + 1.0 (frac(f d, f s)), where the last uncertainty is due to the knowledge of f d / f s, the ratio of b-quark hadronization factors that accounts for the different production rate of B 0 and B s 0 mesons. The ratio of the branching fractions of B s 0 → J / ψ η ′ and B s 0 → J / ψ η decays is measured to befrac(B (B s 0 → J / ψ η ′), B (B s 0 → J / ψ η)) = 0.90 ± 0.09 (stat) - 0.02 + 0.06 (syst)
Letter from Carl Hayden to M. J. Riordan
No full textLetter from Carl Hayden to M. J. Riordan expressing his support for Coconino County in turning over the Bright Angel Trail to the federal government
Xenocrate peculiaris Ng & Castro 2007
No full textXenocrate peculiaris Ng & Castro, 2007 (Figs. 49A–H; 50A–D) Xenocrate peculiaris Ng & Castro, 2007: 45, figs. 1–5. – Ng et al. 2008: 79 [in list]. Type material. Male holotype, 34.0 mm × 39.1 mm (NMCR); 1 male paratype, 39.6 mm × 45.8 mm (ZRC 2008.0428), 1 female paratype, 36.9 mm × 42.2 mm (ZRC 2008.0427). Type locality. Philippines, Bohol, Panglao I., Maribojoc Bay, 100–300 m. Material examined. Philippines. Bohol. Panglao I., Maribojoc Bay, tangle nets, 100–300 m, T. J. Arbasto coll., 11.2003 –04.2004: male holotype 34.0 mm × 39.1 mm (NMCR); 06.2004 –05.2005: 1 male paratype, 39.6 mm × 45.8 mm (ZRC 2008.0428). PANGLAO 2005: stn. L45, tangle nets, T. J. Arbasto coll., 80–90 m, 03.07.2004: 1 female paratype, 36.9 mm × 42.2 mm (ZRC 2008.0427). Solomon Is. SALOMON 1: stn. DW 1823, 09°50.4’S, 160°53.2’E, 82–83 m, 04.10.2001: 1 male, 10.5 mm × 12.7 mm (MNHN-B830609). Vanuatu. SANTO 2006: stn.EP40, west Tutuba I., 15°33.1/33.6’S, 167°16.4/16.5’E, tangle net, 125–156 m, 18.10.2006: 1 male, 30.8 mm × 36.8 mm (MNHN-B). Diagnosis. Dorsal, ventral surface of carapace granular, carapace subhexagonal, with two short teeth on each anterolateral border (Fig. 49A–C). Orbits short, shorter than front, wide, spherical (Fig. 49C). Distribution. Western Pacific: Philippines, Solomon Is., and Vanuatu. Depth: 80– 300 m.Published as part of CASTRO, PETER & NG, PETER K. L., 2010, Revision of the family Euryplacidae Stimpson, 1871 (Crustacea: Decapoda: Brachyura: Goneplacoidea), pp. 1-130 in Zootaxa 2375 (1) on pages 115-116, DOI: 10.11646/zootaxa.2375.1.1, http://zenodo.org/record/628270
FIGURE 1. Cosmos pseudoperfoliatus Art. Castro, M. Harker et Aaron Rodr. A. Habit with a in Two new species of Cosmos section Discopoda (Coreopsideae: Asteraceae) from Jalisco, Mexico
No full textFIGURE 1. Cosmos pseudoperfoliatus Art. Castro, M. Harker et Aaron Rodr. A. Habit with a detail of stem pubescence. B. Rhizome and tuberous roots. C. Leaf shape variation. D. Head, front view. E. Head, lateral view with phyllaries. F. Ray floret with tube details. G. Disk florets and palea. H. Style and stigma details. I. Anthers and pubescent filaments. J. Tuberculate achenes, dorsal and lateral view. Illustrated by Oswaldo Zuno Delgadillo based on M. Harker et al. 4189 (IBUG holotype).Published as part of Castro-Castro, Arturo, Harker, Mollie, Vargas-Amado, Georgina & Rodríguez, Aarón, 2013, Two new species of Cosmos section Discopoda (Coreopsideae: Asteraceae) from Jalisco, Mexico, pp. 35-49 in Phytotaxa 146 (2) on page 39, DOI: 10.11646/phytotaxa.146.2.1, http://zenodo.org/record/510015
M. DEL POZZO – J. CASTRO TRAPOTE, El orden constitucional del Pueblo de Dios. : Compendio de Derecho Constitucional Canónico. Pamplona: EUNSA 2024, 442 pp.
Get PDFBook review of: M. DEL POZZO – J. CASTRO TRAPOTE, El orden constitucional del Pueblo de Dios. Compendio de derecho constitucional canónico, Pamplona: EUNSA 2024, 442 pp., ISBN 978-84-313-3963-0.Recensión del libro: M. DEL POZZO – J. CASTRO TRAPOTE, El orden constitucional del Pueblo de Dios. Compendio de derecho constitucional canónico, Pamplona: EUNSA 2024, 442 pp., ISBN 978-84-313-3963-0
Letter from M. J. Riordan, Arizona Lumber and Timber Company, to Carl Hayden
No full textLetter from M. J. Riordan to Carl Hayden expressing his opposition to the federal government's takeover of Bright Angel Trail
Distinct alterations in the guanylate cyclase-C/cGMP pathway are evident across different subtypes of irritable bowel syndrome patients
No full textPoster presentation PP097A. M. Harrington, J. Castro, R. L. Young, C. Kurtz, A. Silos-Santiago, N. Nguyen, J. M. Andrews and S. M. Brierle
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