47,453 research outputs found
[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
Some Insights Into The Reactivity Of Oxovanadium Phosphate: Synthesis And Characterization Of An Vopo4-h2n(ch2) 3nh2 Coordination Compound
No full textThe lamellar matrix of VOPO4·2H2O was used as the host species to prepare a VOPO4-1,3-diaminopropane coordination compound. The oxovanadium matrix and the synthesized hybrid were characterized by elemental analysis, infared spectroscopy, thermogravimetry, X-ray diffractometry and SEM microscopy. The elemental analysis results, as well as the X-ray diffraction patterns and quantum chemical calculations, strongly suggest that the synthesized matrix is an equimolar (1:1) mixture of two compounds with the formulas VOPO4·[H2N-(CH 2)3-NH2] and VOPO4·[H 2N-(CH2)3-NH2]0.5. The SEM micrographs obtained for the VOPO4- diaminopropane hybrid matrix show that the microstructure of VOPO4·2H2O is changed after reaction, with an overall exfoliation of the oxovanadium matrix.701112831290Benes, L., Melánova, K., Zima, V., Kalousová, J., Votinsky, J., (1997) Inorg. Chem., 36, p. 2850De Stefanis, A., Foglia, S., Tomlinson, A.G., (1995) J. Mater. Chem., 5, p. 475Nakajima, H., Matsubayashi, G.-E., (1995) J. Mater. Chem., 5, p. 105De Stefanis, A., Tomlinson, A.G., (1994) J. Mater. Chem., 5, p. 319Johnson, J.W., Jacobson, A.J., Brody, J.F., Rieh, S.M., (1982) Inorg. Chem., 21, p. 3820Yatabe, Y., Matsubayashi, G.-E., (1996) J. Mater. Chem., 6, p. 1849Nakato, T., Furuni, Y., Terao, N., Okuhara, T., (2000) J. Mater. Chem., 10, p. 737Ellison, I.J., Hutchings, G.J., Sananes, M.T., Volta, J.-C., (1994) J. Chem. Soc. Chem. Commun., p. 1093Benes, L., Hyklová, R., (1990) Inorg. Chim. Acta, 177, p. 71Nakato, T., Furumi, Y., Okuhara, T., (1998) Chem. Lett., p. 611Wavefunction Inc., Irvine, CA, USABordes, E., Courtine, P., Pannetier, G., (1973) Ann. Chim., 8, p. 105R'kha, C., Vandenboore, M.T., Livage, L., Prost, R., Huard, E., (1986) J. Solid State Chem., 63, p. 202Silverstein, R.M., Bassler, G.C., Morril, T.C., (1991) Spectrometric Identification of Organic, , Compound, Wiley, New YorkDe Farias, R.F., Airoldi, C., (2002) J. Solid State Chem., 166, p. 277De Farias, R.F., Airoldi, C., (2003) Solid State Sci., 5, p. 611Machado, M.O., De Farias, R.F., Airoldi, C., (2004) J. Phys. Chem. Solids, 65, p. 169
Alkoxide As Precursors In The Synthesis Of New Materials Through The Sol-gel Process [alcóxidos Como Precursores Na Síntese De Novos Materiais Através Do Processo Sol-gel]
No full textAn overview about the role of alkoxides in the most recent uses of the sol-gel process in the synthesis of new materials is presented. Special attention is focused on the uses of silicon, aluminum, zirconium and titanium alkoxides. This review shows that the alkoxides enable the synthesis of new matrices with controlled surface area, acidity and porosity, as well as some unusual properties. The property associated with the solubility of metal alkoxides opens enormous possibilities of combining them for the synthesis films of powders with a very large range of metal compositions.2718488Lehn, J.M., (1996) Compreensive Supramolecular Chemistry, , BPC Wheatons: ExceterSteed, J.W., Atwood, J.L., (2000) Supramolecular Chemistry, , Wiley: New YorkCorriu, R.J.P., (2001) Eur. J. Inorg. Chem., p. 1109Cerveau, G., Corriu, R.J.P., Framery, E., (1999) Chem. 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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
Figure 1 from: Farias SQ, Medeiros D, Riina R (2019) A new species of dragon's blood Croton (Euphorbiaceae) endemic to the Serra dos Órgãos (Rio de Janeiro, Brazil). PhytoKeys 126: 13-24. https://doi.org/10.3897/phytokeys.126.35649
No full textFigure 1 Crotonrizzinii. A Adult individual in hillside forest B young flowering branch C mature flowering branch D detail of a mature flowering branch E detail of laciniate-glandular stipules F young branch showing yellowish latex G detail of leaf showing acropetiolar glands H–K stages of development of pistillate flowers H top view of a young pistillate flower I young pistillate flower showing a maculate gland on the distal portion of the sepal J young pistillate flower K mature pistillate flower L fruit M inflorescence showing pistillate and staminate flowers N inflorescence showing fruits. (Photos by S.Q. Farias)
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)
Dietary inclusion inclusion of Durvillaea antarctica meal and rapeseed (Brassica napus) oil on growth, feed utilization and fillet quality of rainbow trout (Oncorhynchus mykiss)
No full textEsta investigación fue apoyada financieramente por el proyecto Fondecyt de Postdoctorado No3190287 (J. Quiñones). Los autores agradecen los Proyectos Fondecyt: Iniciación en Investigación No 11190621 (R. Díaz) y Regular No 1180387 (JG. Farias). Los Autores agradecen a Eduardo Fuentes, perteneciente al Núcleo de Investigación de Producción Alimentaria, Departamento de Ciencias Agropecuarias y Acuícolas, Facultad de Recursos Naturales, Universidad Católica de Temuco, Temuco, Chile, por la fabricación de las dietas para este estudio.This research was financially supported by Postdoctorate Fondecyt project No3190287 (J. Quinones). The authors would like to thank Fondecyt Projects: Initiation in Research No 11190621 (R. Diaz) and Regular No 1180387 (JG. Farias). The Authors would like to thank Eduardo Fuentes, belonging to Nucleo de Investigacion de Produccion Alimentaria, Departamento de Ciencias Agropecuarias y Acuicolas, Facultad de Recursos Naturales, Universidad Catolica de Temuco, Temuco, Chile, for the manufacture of the diets for this study
Synthesis And Characterization Of A Vopo4-dma Compound [síntese E Caracterização De Um Composto Vopo 4-dma]
No full textA layered matrix, α-VOPO4.2H2O was used as host species to produce a VOPO4.dimethylacetamide intercalation compound. The oxovanadium matrix and the synthesized hybrid were characterized by elemental analysis, infrared spectroscopy, thermogravimetry, X-ray diffractometry and SEM microscopy. The X-ray diffraction patterns show that the VOPO4.dimethylacetamide compound is amorphous, but can be turned lamellar after a solubilization-crystallization process. The SEM micrographs obtained for the VOPO4-dimethylacetamide hybrid matrix show that the microstructure of VOPO4.2H2O is changed after reaction, with a delamination of the oxovanadium matrix.264493496Guliants, V.V., Benziger, J.B., Sundaresan, S., (1995) J. Catal., 156, p. 298Bordes, E., Courtine, P., (1979) J. Catal., 57, p. 236Benes, L., Melánová, K., Zima, V., Kalousová, J., Votinský, J., (1997) Inorg. Chem., 36, p. 2850De Stefanis, A., Foglia, S., Tomlinson, A.G., (1995) J. Mater. Chem., 5, p. 475Nakajima, H., Matsubayashi, G.-E., (1995) J. Mater. Chem., 5, p. 105De Stefanis, A., Tomlinson, A.G., (1994) J. Mater. Chem., 5, p. 319Johnson, J.W., Jacobson, A.J., Brody, J.F., Rich, S.M., (1982) Inorg. Chem., 21, p. 3820Yatabe, Y., Matsubayashi, G.-E., (1996) J. Mater. Chem., 6, p. 1849Nakato, T., Furumi, Y., Terao, N., Okuhara, T., (2000) J. Mater. Chem., 10, p. 737Ellison, I.J., Hutchings, G.J., Sananes, M.T., Volta, J.-C., (1994) J. Chem. Soc. Chem. Commun., p. 1093De Farias, R.F., Airoldi, C., (2002) J. Therm. Anal. Calorim., 67, p. 579Wavefunction Inc.Irvine, CA, USABordes, E., Courtine, P., Pannetier, G., (1973) Ann. Chim., 8, p. 105R'kha, C., Vandenboore, M.T., Livage, L., Prost, R., Huard, E., (1986) J. Solid State Chem., 63, p. 202De Farias, R.F., Airoldi, C., J. Solid State Chem., , no prel
Nonabrupt Interface Related Exciton Energy Shifts In Gan/alxga1-xn Quantum Dots
No full textThe existence of smooth interfaces was observed to change considerably the confined carriers energy levels and exciton energies in GaN/AlxGa1-xN quantum dots. The results were obtained within the framework of the effective-mass theory. It was observed a shift of the ground-state exciton energy about 27 meV if a 10 angstroms wide smooth interface exists in a GaN/Al0.3Ga0.7N dot with 50 angstroms of radius. This is a realistic case considering that interface widths are actually about this magnitude.338II/Tanaka, S., Iwai, S., Aoyagi, Y., (1996) Appl. Phys. Lett., 69, p. 4096Daudin, B., Widmann, F., Feuillet, G., (1997) Phys. Rev. B, 56, pp. R7069Tanaka, S., Hirayama, H., Aoyagi, Y., Narukawa, Y., Kawakami, Y., Fujita, S., Fujita, S., (1997) Appl. Phys. Lett., 71, p. 1299Hirayama, H., Tanaka, S., Ramvall, P., Aoyagi, Y., (1998) Appl. Phys. Lett., 72, p. 1736Widmann, F., Daudin, B., Feuillet, G., Samson, Y., Rouvière, J.L., Pelekanos, N., (1998) J. Appl. Phys., 83, p. 7618Ramvall, P., Tanaka, S., Nomura, S., Riblet, P., Aoyagi, Y., (1998) Appl. Phys. Lett., 73, p. 1104Petersson, A., Gustafsson, A., Samuelson, L., Tanaka, S., Aoyagi, Y., (1999) Appl. Phys Lett., 74, p. 3513Arlery, M., Rouvière, J.L., Widmann, F., Daulin, B., Feuillet, G., Mariette, H., (1999) Appl. Phys. Lett., 74, p. 3287Shi, J.-M., Freire, V.N., Farias, G.A., (1998) Solid State Communic., 108, p. 803Wang, H., Farias, G.A., Freire, V.N., (1999) Phys. Rev. B, 60, p. 5705Ando, Y., Itoh, T., (1987) J. Appl. Phys., 61, p. 1497Ribeiro Filho, J., Lemos, V., De Sousa, J.S., Farias, G.A., Freire, V.N., private communicationLeroux, M., Grandjean, N., Laügt, M., Massies, J., Gil, B., Lefebvre, P., Bigenwald, P., (1998) Phys. Rev. B, 58, pp. R13371. , and references thereinWidmann, F., Simon, J., Daudin, B., Feuillet, G., Rouvière, J.L., Pelekanos, N.T., Fishman, G., (1998) Phys. Rev. B, 58, pp. R1598
Observations 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
- …
