oalib

Publish in OALib Journal

ISSN: 2333-9721

APC: Only $99

Submit

Any time

2020 ( 20 )

2019 ( 1074 )

2018 ( 1376 )

2017 ( 1341 )

Custom range...

Search Results: 1 - 10 of 769766 matches for " J. M. López-Casta?o "
All listed articles are free for downloading (OA Articles)
Page 1 /769766
Display every page Item
Muon capture on light isotopes in Double Chooz
Double Chooz collaboration,Y. Abe,T. Abrah?o,H. Almazan,C. Alt,S. Appel,J. C. Barriere,E. Baussan,I. Bekman,M. Bergevin,T. J. C. Bezerra,L. Bezrukov,E. Blucher,T. Brugière,C. Buck,J. Busenitz,A. Cabrera,L. Camilleri,R. Carr,M. Cerrada,E. Chauveau,P. Chimenti,A. P. Collin,E. Conover,J. M. Conrad,J. I. Crespo-Anadón,K. Crum,A. S. Cucoanes,E. Damon,J. V. Dawson,H. de Kerret,J. Dhooghe,D. Dietrich,Z. Djurcic,J. C. dos Anjos,M. Dracos,A. Etenko,M. Fallot,J. Felde,S. M. Fernandes,V. Fischer,D. Franco,M. Franke,H. Furuta,I. Gil-Botella,L. Giot,M. G?ger-Neff,H. Gomez,L. F. G. Gonzalez,L. Goodenough,M. C. Goodman,N. Haag,T. Hara,J. Haser,D. Hellwig,M. Hofmann,G. A. Horton-Smith,A. Hourlier,M. Ishitsuka,J. Jochum,C. Jollet,F. Kaether,L. N. Kalousis,Y. Kamyshkov,M. Kaneda,D. M. Kaplan,T. Kawasaki,E. Kemp,D. Kryn,M. Kuze,T. Lachenmaier,C. E. Lane,T. Lasserre,A. Letourneau,D. Lhuillier,H. P. Lima Jr,M. Lindner,J. M. López-Castao,J. M. LoSecco,B. Lubsandorzhiev,S. Lucht,J. Maeda,C. Mariani,J. Maricic,J. Martino,T. Matsubara,G. Mention,A. Meregaglia,T. Miletic,R. Milincic,A. Minotti,Y. Nagasaka,D. Navas-Nicolás,P. Novella,L. Oberauer,M. Obolensky,A. Onillon,A. Osborn,C. Palomares,I. M. Pepe,S. Perasso,A. Porta,G. Pronost,J. Reichenbacher,B. Reinhold,M. R?hling,R. Roncin,B. Rybolt,Y. Sakamoto,R. Santorelli,A. C. Schilithz,S. Sch?nert,S. Schoppmann,M. H. Shaevitz,R. Sharankova,D. Shrestha,V. Sibille,V. Sinev,M. Skorokhvatov,E. Smith,M. Soiron,J. Spitz,A. Stahl,I. Stancu,L. F. F. Stokes
Physics , 2015,
Abstract: Using the Double Chooz detector, designed to measure the neutrino mixing angle $\theta_{13}$, the products of $\mu^-$ capture on $^{12}$C, $^{13}$C, $^{14}$N and $^{16}$O have been measured. Over a period of 489.5 days, $2.3\times10^6$ stopping cosmic $\mu^-$ have been collected, of which $1.8\times10^5$ captured on carbon, nitrogen, or oxygen nuclei in the inner detector scintillator or acrylic vessels. The resulting isotopes were tagged using prompt neutron emission (when applicable), the subsequent beta decays, and, in some cases, $\beta$-delayed neutrons. The most precise measurement of the rate of $^{12}\mathrm C(\mu^-,\nu)^{12}\mathrm B$ to date is reported: $6.57^{+0.11}_{-0.21}\times10^{3}\,\mathrm s^{-1}$, or $(17.35^{+0.35}_{-0.59})\%$ of nuclear captures. By tagging excited states emitting gammas, the ground state transition rate to $^{12}$B has been determined to be $5.68^{+0.14}_{-0.23}\times10^3\,\mathrm s^{-1}$. The heretofore unobserved reactions $^{12}\mathrm C(\mu^-,\nu\alpha)^{8}\mathrm{Li}$, $^{13}\mathrm C(\mu^-,\nu\mathrm n\alpha)^{8}\mathrm{Li}$, and $^{13}\mathrm C(\mu^-,\nu\mathrm n)^{12}\mathrm B$ are measured. Further, a population of $\beta$n decays following stopping muons is identified with $5.5\sigma$ significance. Statistics limit our ability to identify these decays definitively. Assuming negligible production of $^{8}$He, the reaction $^{13}\mathrm C(\mu^-,\nu\alpha)^{9}\mathrm{Li}$ is found to be present at the $2.7\sigma$ level. Limits are set on a variety of other processes.
Measurement of $θ_{13}$ in Double Chooz using neutron captures on hydrogen with novel background rejection techniques
Double Chooz Collaboration,Y. Abe,T. Abrah?o,H. Almazan,C. Alt,J. C. dos Anjos,J. C. Barriere,E. Baussan,I. Bekman,M. Bergevin,T. J. C. Bezerra,L. Bezrukov,E. Blucher,T. Brugière,C. Buck,J. Busenitz,A. Cabrera,L. Camilleri,R. Carr,M. Cerrada,E. Chauveau,P. Chimenti,A. P. Collin,J. M. Conrad,J. I. Crespo-Anadón,K. Crum,A. S. Cucoanes,E. Damon,J. V. Dawson,J. Dhooghe,D. Dietrich,Z. Djurcic,M. Dracos,A. Etenko,M. Fallot,F. von Feilitzsch,J. Felde,S. M. Fernandes,V. Fischer,D. Franco,M. Franke,H. Furuta,I. Gil-Botella,L. Giot,M. G?ger-Neff,H. Gomez,L. F. G. Gonzalez,L. Goodenough,M. C. Goodman,N. Haag,T. Hara,J. Haser,D. Hellwig,M. Hofmann,G. A. Horton-Smith,A. Hourlier,M. Ishitsuka,J. Jochum,C. Jollet,F. Kaether,L. N. Kalousis,Y. Kamyshkov,M. Kaneda,D. M. Kaplan,T. Kawasaki,E. Kemp,H. de Kerret,D. Kryn,M. Kuze,T. Lachenmaier,C. E. Lane,T. Lasserre,A. Letourneau,D. Lhuillier,H. P. Lima Jr,M. Lindner,J. M. López-Castao,J. M. LoSecco,B. Lubsandorzhiev,S. Lucht,J. Maeda,C. Mariani,J. Maricic,J. Martino,T. Matsubara,G. Mention,A. Meregaglia,T. Miletic,R. Milincic,A. Minotti,Y. Nagasaka,D. Navas-Nicolás,P. Novella,L. Oberauer,M. Obolensky,A. Onillon,A. Osborn,C. Palomares,I. M. Pepe,S. Perasso,A. Porta,G. Pronost,J. Reichenbacher,B. Reinhold,M. R?hling,R. Roncin,B. Rybolt,Y. Sakamoto,R. Santorelli,A. C. Schilithz,S. Sch?nert,S. Schoppmann,M. H. Shaevitz,R. Sharankova,D. Shrestha,V. Sibille,V. Sinev,M. Skorokhvatov,E. Smith,M. Soiron,J. Spitz,A. Stahl,I. Stancu,L. F. F. Stokes
Physics , 2015,
Abstract: The Double Chooz collaboration presents a measurement of the neutrino mixing angle $\theta_{13}$ using reactor $\overline{\nu}_{e}$ observed via the inverse beta decay reaction in which the neutron is captured on hydrogen. This measurement is based on 462.72 live days data, approximately twice as much data as in the previous such analysis, collected with a detector positioned at an average distance of 1050m from two reactor cores. Several novel techniques have been developed to achieve significant reductions of the backgrounds and systematic uncertainties. Accidental coincidences, the dominant background in this analysis, are suppressed by more than an order of magnitude with respect to our previous publication by a multi-variate analysis. These improvements demonstrate the capability of precise measurement of reactor $\overline{\nu}_{e}$ without gadolinium loading. Spectral distortions from the $\overline{\nu}_{e}$ reactor flux predictions previously reported with the neutron capture on gadolinium events are confirmed in the independent data sample presented here. A value of $\sin^{2}2\theta_{13} = 0.095^{+0.038}_{-0.039}$(stat+syst) is obtained from a fit to the observed event rate as a function of the reactor power, a method insensitive to the energy spectrum shape. A simultaneous fit of the hydrogen capture events and of the gadolinium capture events yields a measurement of $\sin^{2}2\theta_{13} = 0.088\pm0.033$(stat+syst).
Improved measurements of the neutrino mixing angle $θ_{13}$ with the Double Chooz detector
Y. Abe,J. C. dos Anjos,J. C. Barriere,E. Baussan,I. Bekman,M. Bergevin,T. J. C. Bezerra,L. Bezrukov,E. Blucher,C. Buck,J. Busenitz,A. Cabrera,E. Caden,L. Camilleri,R. Carr,M. Cerrada,P. -J. Chang,E. Chauveau,P. Chimenti,A. P. Collin,E. Conover,J. M. Conrad,J. I. Crespo-Anadón,K. Crum,A. S. Cucoanes,E. Damon,J. V. Dawson,J. Dhooghe,D. Dietrich,Z. Djurcic,M. Dracos,M. Elnimr,A. Etenko,M. Fallot,F. von Feilitzsch,J. Felde,S. M. Fernandes,V. Fischer,D. Franco,M. Franke,H. Furuta,I. Gil-Botella,L. Giot,M. G?ger-Neff,L. F. G. Gonzalez,L. Goodenough,M. C. Goodman,C. Grant,N. Haag,T. Hara,J. Haser,M. Hofmann,G. A. Horton-Smith,A. Hourlier,M. Ishitsuka,J. Jochum,C. Jollet,F. Kaether,L. N. Kalousis,Y. Kamyshkov,D. M. Kaplan,T. Kawasaki,E. Kemp,H. de Kerret,D. Kryn,M. Kuze,T. Lachenmaier,C. E. Lane,T. Lasserre,A. Letourneau,D. Lhuillier,H. P. Lima Jr,M. Lindner,J. M. López-Castao,J. M. LoSecco,B. Lubsandorzhiev,S. Lucht,J. Maeda,C. Mariani,J. Maricic,J. Martino,T. Matsubara,G. Mention,A. Meregaglia,T. Miletic,R. Milincic,A. Minotti,Y. Nagasaka,Y. Nikitenko,P. Novella,L. Oberauer,M. Obolensky,A. Onillon,A. Osborn,C. Palomares,I. M. Pepe,S. Perasso,P. Pfahler,A. Porta,G. Pronost,J. Reichenbacher,B. Reinhold,M. R?hling,R. Roncin,S. Roth,B. Rybolt,Y. Sakamoto,R. Santorelli,A. C. Schilithz,S. Sch?nert,S. Schoppmann,M. H. Shaevitz,R. Sharankova,S. Shimojima,D. Shrestha,V. Sibille,V. Sinev,M. Skorokhvatov,E. Smith,J. Spitz,A. Stahl,I. Stancu,L. F. F. Stokes,M. Strait,A. Stüken,F. Suekane
Physics , 2014, DOI: 10.1007/JHEP10(2014)086
Abstract: The Double Chooz experiment presents improved measurements of the neutrino mixing angle $\theta_{13}$ using the data collected in 467.90 live days from a detector positioned at an average distance of 1050 m from two reactor cores at the Chooz nuclear power plant. Several novel techniques have been developed to achieve significant reductions of the backgrounds and systematic uncertainties with respect to previous publications, whereas the efficiency of the $\bar\nu_{e}$ signal has increased. The value of $\theta_{13}$ is measured to be $\sin^{2}2\theta_{13} = 0.090 ^{+0.032}_{-0.029}$ from a fit to the observed energy spectrum. Deviations from the reactor $\bar\nu_{e}$ prediction observed above a prompt signal energy of 4 MeV and possible explanations are also reported. A consistent value of $\theta_{13}$ is obtained from a fit to the observed rate as a function of the reactor power independently of the spectrum shape and background estimation, demonstrating the robustness of the $\theta_{13}$ measurement despite the observed distortion.
Background-independent measurement of $θ_{13}$ in Double Chooz
Y. Abe,J. C. dos Anjos,J. C. Barriere,E. Baussan,I. Bekman,M. Bergevin,T. J. C. Bezerra,L. Bezrukov,E. Blucher,C. Buck,J. Busenitz,A. Cabrera,E. Caden,L. Camilleri,R. Carr,M. Cerrada,P. -J. Chang,E. Chauveau,P. Chimenti,A. P. Collin,E. Conover,J. M. Conrad,J. I. Crespo-Anadón,K. Crum,A. Cucoanes,E. Damon,J. V. Dawson,D. Dietrich,Z. Djurcic,M. Dracos,M. Elnimr,A. Etenko,M. Fallot,F. von Feilitzsch,J. Felde,S. M. Fernandes,V. Fischer,D. Franco,M. Franke,H. Furuta,I. Gil-Botella,L. Giot,M. G?ger-Neff,L. F. G. Gonzalez,L. Goodenough,M. C. Goodman,C. Grant,N. Haag,T. Hara,J. Haser,M. Hofmann,G. A. Horton-Smith,A. Hourlier,M. Ishitsuka,J. Jochum,C. Jollet,F. Kaether,L. N. Kalousis,Y. Kamyshkov,D. M. Kaplan,T. Kawasaki,E. Kemp,H. de Kerret,T. Konno,D. Kryn,M. Kuze,T. Lachenmaier,C. E. Lane,T. Lasserre,A. Letourneau,D. Lhuillier,H. P. Lima Jr,M. Lindner,J. M. López-Castao,J. M. LoSecco,B. K. Lubsandorzhiev,S. Lucht,J. Maeda,C. Mariani,J. Maricic,J. Martino,T. Matsubara,G. Mention,A. Meregaglia,T. Miletic,R. Milincic,A. Minotti,Y. Nagasaka,K. Nakajima,Y. Nikitenko,P. Novella,M. Obolensky,L. Oberauer,A. Onillon,A. Osborn,C. Palomares,I. M. Pepe,S. Perasso,P. Pfahler,A. Porta,G. Pronost,J. Reichenbacher,B. Reinhold,M. R?hling,R. Roncin,S. Roth,B. Rybolt,Y. Sakamoto,R. Santorelli,F. Sato,A. C. Schilithz,S. Sch?nert,S. Schoppmann,M. H. Shaevitz,R. Sharankova,S. Shimojima,V. Sibille,V. Sinev,M. Skorokhvatov,E. Smith,J. Spitz,A. Stahl,I. Stancu,L. F. F. Stokes,M. Strait,A. Stüken
Statistics , 2014, DOI: 10.1016/j.physletb.2014.04.045
Abstract: The oscillation results published by the Double Chooz collaboration in 2011 and 2012 rely on background models substantiated by reactor-on data. In this analysis, we present a background-model-independent measurement of the mixing angle $\theta_{13}$ by including 7.53 days of reactor-off data. A global fit of the observed neutrino rates for different reactor power conditions is performed, yielding a measurement of both $\theta_{13}$ and the total background rate. The results on the mixing angle are improved significantly by including the reactor-off data in the fit, as it provides a direct measurement of the total background rate. This reactor rate modulation analysis considers antineutrino candidates with neutron captures on both Gd and H, whose combination yields $\sin^2(2\theta_{13})=$ 0.102 $\pm$ 0.028(stat.) $\pm$ 0.033(syst.). The results presented in this study are fully consistent with the ones already published by Double Chooz, achieving a competitive precision. They provide, for the first time, a determination of $\theta_{13}$ that does not depend on a background model.
First Measurement of θ_13 from Delayed Neutron Capture on Hydrogen in the Double Chooz Experiment
Double Chooz Collaboration,Y. Abe,C. Aberle,J. C. dos Anjos,J. C. Barriere,M. Bergevin,A. Bernstein,T. J. C. Bezerra,L. Bezrukhov,E. Blucher,N. S. Bowden,C. Buck,J. Busenitz,A. Cabrera,E. Caden,L. Camilleri,R. Carr,M. Cerrada,P. -J. Chang,P. Chimenti,T. Classen,A. P. Collin,E. Conover,J. M. Conrad,J. I. Crespo-Anadón,K. Crum,A. Cucoanes,E. Damon,J. V. Dawson,S. Dazeley,D. Dietrich,Z. Djurcic,M. Dracos,V. Durand,J. Ebert,Y. Efremenko,M. Elnimr,A. Erickson,A. Etenko,M. Fallot,M. Fechner,F. von Feilitzsch,J. Felde,S. M. Fernandes,V. Fischer,D. Franco,A. J. Franke,M. Franke,H. Furuta,R. Gama,I. Gil-Botella,L. Giot,M. G?ger-Neff,L. F. G. Gonzalez,L. Goodenough,M. C. Goodman,J. TM. Goon,D. Greiner,N. Haag,S. Habib,C. Hagner,T. Hara,F. X. Hartmann,J. Haser,A. Hatzikoutelis,T. Hayakawa,M. Hofmann,G. A. Horton-Smith,A. Hourlier,M. Ishitsuka,J. Jochum,C. Jollet,C. L. Jones,F. Kaether,L. N. Kalousis,Y. Kamyshkov,D. M. Kaplan,T. Kawasaki,G. Keefer,E. Kemp,H. de Kerret,T. Konno,D. Kryn,M. Kuze,T. Lachenmaier,C. E. Lane,C. Langbrandtner,T. Lasserre,A. Letourneau,D. Lhuillier,H. P. Lima Jr,M. Lindner,J. M. López-Castao,J. M. LoSecco,B. K. Lubsandorzhiev,S. Lucht,D. McKee,J. Maeda,C. N. Maesano,C. Mariani,J. Maricic,J. Martino,T. Matsubara,G. Mention,A. Meregaglia,M. Meyer,T. Miletic,R. Milincic,H. Miyata,Th. A. Mueller,Y. Nagasaka,K. Nakajima,P. Novella,M. Obolensky,L. Oberauer,A. Onillon,A. Osborn,I. Ostrovskiy,C. Palomares,I. M. Pepe,S. Perasso,P. Perrin,P. Pfahler,A. Porta,W. Potzel
Statistics , 2013, DOI: 10.1016/j.physletb.2013.04.050
Abstract: The Double Chooz experiment has determined the value of the neutrino oscillation parameter $\theta_{13}$ from an analysis of inverse beta decay interactions with neutron capture on hydrogen. This analysis uses a three times larger fiducial volume than the standard Double Chooz assessment, which is restricted to a region doped with gadolinium (Gd), yielding an exposure of 113.1 GW-ton-years. The data sample used in this analysis is distinct from that of the Gd analysis, and the systematic uncertainties are also largely independent, with some exceptions, such as the reactor neutrino flux prediction. A combined rate- and energy-dependent fit finds $\sin^2 2\theta_{13}=0.097\pm 0.034(stat.) \pm 0.034 (syst.)$, excluding the no-oscillation hypothesis at 2.0 \sigma. This result is consistent with previous measurements of $\sin^2 2\theta_{13}$.
First Test of Lorentz Violation with a Reactor-based Antineutrino Experiment
Double Chooz Collaboration,Y. Abe,C. Aberle,J. C. dos Anjos,M. Bergevin,A. Bernstein,T. J. C. Bezerra,L. Bezrukhov,E. Blucher,N. S. Bowden,C. Buck,J. Busenitz,A. Cabrera,E. Caden,L. Camilleri,R. Carr,M. Cerrada,P. -J. Chang,P. Chimenti,T. Classen,A. P. Collin,E. Conover,J. M. Conrad,J. I. Crespo-Anadón,K. Crum,A. Cucoanes,M. V. D'Agostino,E. Damon,J. V. Dawson,S. Dazeley,D. Dietrich,Z. Djurcic,M. Dracos,V. Durand,J. Ebert,Y. Efremenko,M. Elnimr,A. Erickson,M. Fallot,M. Fechner,F. von Feilitzsch,J. Felde,V. Fischer,D. Franco,A. J. Franke,M. Franke,H. Furuta,R. Gama,I. Gil-Botella,L. Giot,M. G?ger-Neff,L. F. G. Gonzalez,M. C. Goodman,J. TM. Goon,D. Greiner,N. Haag,S. Habib,C. Hagner,T. Hara,F. X. Hartmann,J. Haser,A. Hatzikoutelis,T. Hayakawa,M. Hofmann,G. A. Horton-Smith,M. Ishitsuka,J. Jochum,C. Jollet,C. L. Jones,F. Kaether,L. N. Kalousis,Y. Kamyshkov,D. M. Kaplan,T. Katori,T. Kawasaki,G. Keefer,E. Kemp,H. de Kerret,T. Konno,D. Kryn,M. Kuze,T. Lachenmaier,C. E. Lane,T. Lasserre,A. Letourneau,D. Lhuillier,H. P. Lima Jr,M. Lindner,J. M. López-Castao,J. M. LoSecco,B. K. Lubsandorzhiev,S. Lucht,D. McKee,J. Maeda,C. N. Maesano,C. Mariani,J. Maricic,J. Martino,T. Matsubara,G. Mention,A. Meregaglia,M. Meyer,T. Miletic,R. Milincic,H. Miyata,Th. A. Mueller,Y. Nagasaka,K. Nakajima,P. Novella,M. Obolensky,L. Oberauer,A. Onillon,A. Osborn,I. Ostrovskiy,C. Palomares,I. M. Pepe,S. Perasso,P. Perrin,P. Pfahler,A. Porta,W. Potzel,G. Pronost,J. Reichenbacher,B. Reinhold,A. Remoto
Physics , 2012, DOI: 10.1103/PhysRevD.86.112009
Abstract: We present a search for Lorentz violation with 8249 candidate electron antineutrino events taken by the Double Chooz experiment in 227.9 live days of running. This analysis, featuring a search for a sidereal time dependence of the events, is the first test of Lorentz invariance using a reactor-based antineutrino source. No sidereal variation is present in the data and the disappearance results are consistent with sidereal time independent oscillations. Under the Standard-Model Extension (SME), we set the first limits on fourteen Lorentz violating coefficients associated with transitions between electron and tau flavor, and set two competitive limits associated with transitions between electron and muon flavor.
Temperatura base y tasa de extensión foliar en frijol
Barrios-Gómez, Edwin J.;López-Casta?eda, Cándido;
Agrociencia , 2009,
Abstract: temperature is one of the most important abiotic factors that influence physiological and biochemical processes in the growth and development of plants. for bean (phaseolus vulgaris l.), it is postulated that the minimal temperature for growth is 10 °c. with this purpose, a foliar extension rate was calculated (fer, μm d-1) by measuring the central leaflet (mm) from the first trifoliated leaf at 18:00 and 06:00 h; in addition, the base temperature (tb , temperature at which growing stops) was calculated with the fer, in seedlings of commercial and creole bean varieties. therefore, two experiments were carried out in the open at the colegio de postgraduados, montecillo, méxico. experiment i (e-i) was from january 19th to february 8th and experiment ii (e-ii) from february 8th to the 27th in 2005. the seedlings were exposed to nocturnal environmental temperature (e-i, average maximum of 15.8 °c and average minimum of 3.9 °c; e-ii, average maximum of 16.0 °c and average minimum of 3.9 °c) from 18:00 to 06:00 h, with artificial light (800 μe m-2 s-1). the fer in e-i was 58.7 μm d-1 and 61.5 μm d-1 in e-ii, and the tb in e-i was 8.2 and 8.4 °c in e-ii, with an average value of 8.3 °c in both experiments. this value of the tb is useful for calculating the degree-day or development units of heat in mexican genotypes of bean.
RESPUESTA A ALTOS NIVELES DE ESTRéS HíDRICO EN MAíZ
Carlos Hugo Avenda?o-Arrazate,José Domingo Molina-Galan,Carlos Trejo-López,Cándido López-Casta?eda
Agronomía Mesoamericana , 2008,
Abstract: El objetivo de este trabajo fue comparar la respuesta a la sequía, en términos de crecimiento vegetativo, desarrollo reproductivo y la acumulación de materia seca, de cuatro variedades de maíz sometidas a diferentes niveles de estrés hídrico, en el Colegio de Postgraduados, México durante el a o 2003. Las variedades fueron: Zacatecas 58 original (Zo), Cafi me original (Co), Zacatecas 58 SM19 (Z19) y Cafi me SM16 (C16). Los niveles de sequía se aplicaron cuando el suelo llegó al punto de marchitez permanente, siendo éstos: 4, 10 y 20 días de sequía, seguidos de la aplicación inmediata de un riego de recuperación y riegos continuos hasta la cosecha. El crecimiento se detuvo por efecto de la sequía en las cuatro variedades, pero una vez que se aplicó el riego de recuperación, éste ocurrió de manera progresiva, de tal forma que las plantas sometidas a sequía igualaron y en algunos casos llegaron a superar a las de riego como ocurrió en Z19. El número de días a fl oración y asincronía fue mayor en Z19 y C16 que Zo y Co; en el índice de cosecha, las variedades originales disminuyeron menos que las mejoradas; mientras que, la biomasa fue menos afectada en las variedades mejoradas que en las originales conforme se prolongó el periodo de sequía. Por lo anterior, se concluyó que las variedades mejoradas han desarrollado un mecanismo de resistencia a sequía llamado "latencia"; mediante el cual, las plantas detienen su crecimiento en condiciones extremas de sequía, pero en el momento en que nuevamente hay humedad en el suelo, reinician su desarrollo hasta completarlo.
Variación en rendimiento de grano, biomasa y número de granos en cebada bajo tres condiciones de humedad del suelo
López-Casta?eda, Cándido;
Tropical and subtropical agroecosystems , 2011,
Abstract: variability in grain yield (gy), aerial biomass (bm) and number of grains m-2 (g m-2) in f6 lines and commercial varieties of barley was studied, and the relationship among these characters in full-irrigation (fi), drought (d) and rain-fed (rf) conditions was determined. variation in gy, bm and g m-2 among all genotypes, between f6 lines and varieties, and among genotypes of f6 lines and varieties was significant in all the three soil moisture environments. gy, bm and g m-2 in fi were 23, 14 and 21 % greater than the average of the three soil moisture environments; gy, bm and g m"2 in rf were 21, 16 y 24 % lower than this average. f6 lines produced greater gy (380 g m-2), bm (1027 g m-2) and g m-2 (8641) than the commercial varieties (gy=277 g m-2; bm=696 g m-2 y g m-2=7214) in average of the three environments. gy was positive and significantly associated with bm and g m-2; bm and g m-2 were also associated. gy could be improved in either fi, d or rf environments by selecting genotypes with a greater bm and g m-2 or both of them.
Synthesis of 4,6-bis(thiomorpholin-4-ylmethyl)-1,2,3-benzenetriol
A. Ma. Velázquez,L. Torres,R. González,A. Valencia,I. Martínez,A. Pecina,I. Menconi,L. Martínez,A. Ramírez,R. Hernández,R. López-Casta?ares,O. Olvera-Neria,E. Angeles
Molbank , 2005, DOI: 10.3390/m399
Abstract: No abstract available
Page 1 /769766
Display every page Item


Home
Copyright © 2008-2017 Open Access Library. All rights reserved.