64,293 research outputs found
La religion romaine : exploration d'un dictionnaire : J. Contreras, G. Ramos, I. Ramos, Diccionario de la Religión Romana.
No full textPlacido Domingo. La religion romaine : exploration d'un dictionnaire : J. Contreras, G. Ramos, I. Ramos, Diccionario de la Religión Romana.. In: Dialogues d'histoire ancienne, vol. 19, n°1, 1993. pp. 331-334
[Letter to J. G. O'Rielly Regarding Firefighting - October 15, 1943]
No full textLetter to J. G. O'Rielly of W. S. Darley & Company discussing the champion type "H" pump and an enclosed list of fire chiefs located throughout the Middle East. The author of this letter recommends that Mr. Rielly send photographs and the highest pressure recorded on this pump to Captain James C. Thompson
Vaejovis tenamaztlei Contreras-Felix, Francke & Bryson 2015
No full textVaejovis tenamaztlei Contreras-Félix, Francke & Bryson, 2015 Figures 4, 35l, 36l, 3 hl, 38l, 39l, 40k, 41l, 52 Vaejovis tenamaztlei Contreras-Félix, Francke & Bryson, 2015: 133 –138, Figs: 2–14. Type material. Holotype male. MEXICO: Aguascalientes: Municipio Calvillo, 3 km east of “Alamitos” dam, Sierra del Laurel (N 21.73531°, W 102. 69753°, elev. 2440 m), VII-24-2012. Cols.: O. Francke, G. Contreras, D. Barrales & A. Valdez. 1 ♂ (CNAN–T0871). Examined. Paratypes: MEXICO: Aguascalientes: Same data as the holotype. 1 ♂, 3 ♀ (CNANT–0872). MEXICO: Aguascalientes, Municipio Calvillo, Los Alisos, Sierra del Laurel (N 21.725611° W 102.700389°, elev. 2415 m), I- 10-2011. Col.: J. C. Arenas. 1 ♂ (AMNH). Examined. Other specimens examined. MEXICO: Aguascalientes: Municipio Calvillo, Los Alisos, Sierra del Laurel (N 21.725611°, W 102.700389°, elev. 2415 m), VII-20-2010. Col.: R. W. Bryson Jr. 1 ♀ (AMNH), 5 adult ♀, 3 subadult ♂ (CNAN). MEXICO: Aguascalientes: Municipio Calvillo, 3 km east of “Alamitos” dam, Sierra del Laurel (N 21.73531°, W 102.69753°, elev. 2440 m), VII-242012. Cols.: O. Francke, G. Contreras, D. Barrales & A. Valdez. 2 adult ♂, 9 juvenile ♀ (CNAN-Sc13775). Diagnosis. Adult total length ranging from 19 mm to 26 mm (Fig: 52-a, b). Carapace (Fig: 35-l) on males shorter than metasomal segment V (Carapace L/MS-V 0.85 ±0.06), but as long or slightly longer on females [Carapace L/ MS-V 1.02±0.02], and longer than pedipalp femur in both males (Carapace L/Femur L 1.13±0.13) and females [Carapace L/Femur L [1.22±0.07]; anterior margin of carapace slightly concave, almost straight, without median notch. Tergite VII with median lateral and lateral carinae weak, composed of a discontinuous line of rounded granules, and both pairs of carinae not reaching posterior margin. Pectinal tooth count on males 16–17 (mode= 16), on females 13–14 (mode=14). Sternite V without a whitish spot on posterior edge; sternite VII with lateral carinae weak, composed of a cuticular ridge and some scattered granules. Metasomal segment I wider than long (MSI L/ W 0.7 ±0.01); intercarinal spaces on metasomal segments I–V shagreened; metasomal segment V wider than deep (MS-V W/D 1.15 ± 0.1). Vesicle (Fig: 36-l) long and slender (L/ W 2.16 ± 0.1; W/D 1.3 ± 0.03); dorsally with a conspicuous central depressed vesicular gland, deeper on adult males than on females and subadult males, on which it is almost absent. Pedipalp femur (Fig: 37-l) is less than three times longer than wide (L/ W 2.87 ± 0.13) [2.75 ± 0.15]. Patella (Fig: 38-l) less than three times longer than wide (L/ W 2.89 ± 0.11) [2.77 ± 0.13]; patellar prolateral carina weak, with few sharp scattered granules. Chela (Fig: 39, 40-l) rounded (CM L/W 2 ± 0.09 [2 ± 0.1]), as wide as deep (CM W/D 1 [1]); with prolateral median-ventro submedian carina feebly granular, but conspicuously more elevated than other carinae which are represented by low cuticular ridges. Pedipalp chela fingers dentate margins straight, without scalloping. Hemispermatophore (Fig: 41-l): Lamelliform (TL: 3.6; LL: 2;LW: 0.5). Lamina wider at the base, with a median apical crest; laminar hooks with three rounded ridges. Capsular lobe present, well-sclerotized and may present some faint, small granules (updated from Contreras-Fèlix et al., 2015). Full morphometric variation is given in tables 13 and 14. Setae variation is given in tables 9–12. Distribution. Known only from the two localities within the higher elevations of the Sierra del Laurel in southwestern Aguascalientes. This species probably occurs in other regions within the Sierra del Laurel, including adjacent areas in northern Jalisco. Natural history. found in winter during the dry season, as well as in the summer during the rainy season. Specimens were found underneath rocks in oak forest during the day. Specimens from Los Alisos were found along the base of a rock wall, which followed the crest of a hill. Among the specimens collected during July, three females had broods on their back, and the counts of newborns were 14, 18 and 22, respectively; the young were positioned randomly on the mother’s back.Published as part of A, Contreras-Félix Gerardo & Oscar, Francke B., 2019, Taxonomic revision of the " mexicanus " group of the genus Vaejovis C. L. Koch, 1836 (Scorpiones: Vaejovidae), pp. 1-100 in Zootaxa 4596 (1) on pages 82-83, DOI: 10.11646/zootaxa.4596.1.1, http://zenodo.org/record/265909
Measurement of the ratio of prompt χ c to J / ψ production in pp collisions at √s = 7 TeV
No full textThe prompt production of charmonium χ c and J / ψ states is studied in proton-proton collisions at a centre-of-mass energy of √s = 7 TeV at the Large Hadron Collider. The χ c and J / ψ mesons are identified through their decays χ c → J / ψ γ and J / ψ → μ + μ - using 36 pb - 1 of data collected by the LHCb detector in 2010. The ratio of the prompt production cross-sections for χ c and J / ψ, σ (χ c → J / ψ γ) / σ (J / ψ), is determined as a function of the J / ψ transverse momentum in the range 2 < p T J / ψ < 15 GeV / c. The results are in excellent agreement with next-to-leading order non-relativistic expectations and show a significant discrepancy compared with the colour singlet model prediction at leading order, especially in the low p T J / ψ region
Abyssal NE Pacific Seafloor Megafauna Dataset
No full textBenthic megafauna (animals &gt; 10 mm) observations from seabed imagery data across the NE Pacific abyss Data repository associated with the following manuscript: Simon-Lledó, E., Amon, D.J., Bribiesca‐Contreras, G., Cuvelier, D., Durden, J.M., Ramalho, S.P., Uhlenkott, K., Martinez Arbizu, P., Benoist, N., Copley, J., Dahlgren, T.G., Glover, A.G., Fleming, B., Horton, T., Ju, S-J., Mejia-Saenz, A., McQuaid, K., Pape, E., Park, C., Smith, C.R., and Jones, D.O.B. (in press). Carbonate compensation depth drives abyssal biogeography in the northeast Pacific. Nature Ecology &amp; Evolution</span
Non-covalent Interactions descriptor using experimental electron density
No full textNon covalent interactions (NCI) play a crucial role in biology
(protein-drug recognition) and in the design of new materials (selfassembly).
A novel electron density (ED) based descriptor of non
covalent interaction was proposed in 2010 by Johnson et al.[1]. It
exploits a key quantity in DFT, the reduced density gradient s∝|∇ρ|/
ρ4/3, and reveals NCI in terms of low s-value isosurfaces, defi ned in
low-ED regions and on which the ED is mapped with a colour related
to the sign of the local density curvature along the second largest
variation direction and to the magnitude of the ED itself. Though
directly obtainable from experimental EDs, up to now such descriptor
has been applied only to theoretical EDs or to independent atom model
(IAM) densities.
In this work, we explore the application of this new descriptor to
NCI in the bulk, using X-ray derived EDs. In particular, molecular
crystals represent ideal supramolecular entities for studying non
covalent interactions and the global effect that the crystal fi eld has on
them. Austdiol [2], benzene [3] and the two polymorphs of the antiulcer
drug famotidine [4] were chosen as representative case studies.
Atom-centred multipole expansions (XD2006 package [5]) were
adopted in the refi nement against the experimental structure factors
and the grid fi les for implementing the NCI descriptor were obtained
with an ad-hoc code. The NCI isosurfaces obtained from experiment
have been also compared with those calculated using ab-initio periodic
wavefunctions and the IAM densities.
On the basis of the experience gained on the investigated systems,
it turns out that when applied to experimental EDs the NCI descriptor
gives essentially similar information to that found for theoretical EDs.
For instance, as shown in the fi gure below for benzene crystal, we fi nd
that interactions having a presumably delocalized nature, such as π-π
stackings or C-H⋅⋅⋅π contacts, are indeed seen as extended surfaces,
at variance with the localized and discontinuous picture unavoidably
provided by the bond path analysis. Moreover, we confi rm that
mapping the ED on the s isosurface highlights the strength of the
various interactions, while the sign of the curvature helps to distinguish
true stabilizing interactions from simple steric repulsions. The visible
difference between the NCI isosurfaces portrait found in benzene
crystal on passing from the multipolar to the IAM density corroborates
the stabilizing and not simply steric nature of the π-π stacking and CH⋅⋅⋅
π interactions. [1] E.R. Johnson et al., JACS 2010, 132, 6498-6506. [2] L. Lo Presti et al. J.
Chem Phys. B 2006, 110, 6405-6414 [3] H.-B. Bürgi et al. Chem. Eur. J. 2002,
8, 3512-3521 [4] J. Overgaard et al. Acta Cryst. 2004, A60, 480-487 [5] http://
xd.chem.buffalo.edu
Evidence for the decay B0→J/ψω and measurement of the relative branching fractions of meson decays to J/ψη and J/ψη′
No full textFirst 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)
Estudo de uma fonte de alimentação trifásica, alto fator de potência, comutação suave, com um único estágio de processamento de potência
No full textObservations of Bºs→ψ(2S)η and Bº(s)→ψ(2S)π+π- decays
No full textFirst observations of the B0s
→ψ(2S)η, B0 →ψ(2S)π
+
π
− and B0s
→ψ(2S)π
+
π
− decays are made
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
√
s = 7 TeV. The ratios of the branching fractions
of each of the ψ(2S) modes with respect to the corresponding J/ψ decays are
B(B0s
→ψ(2S)η)
÷
B(B0s
→J/ψη)
= 0.83± 0.14 (stat)±0.12 (syst) ±0.02 (B),
;
B(B0→ψ(2S)π
+
π
−
)
÷
B(B0→J/ψπ
+
π
−
)
= 0.56± 0.07 (stat)±0.05 (syst)± 0.01 (B),
;
B(B0s
→ψ(2S)π
+
π
−
)
÷
B(B0s
→J/ψπ
+
π
−
)
= 0.34± 0.04 (stat)±0.03 (syst)± 0.01 (B),
where the third uncertainty corresponds to the uncertainties of the dilepton branching fractions of the J/ψ
and ψ(2S) meson decays
- …
