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Now showing items 17 - 32 of 54

  • Correlated genetic trend in the environmental variability of weight traits in mice.

    Moreno, A.   Ibanez-Escriche, N.   Garcia-Ballesteros, S.   Salgado, C.   Nieto, B.   Gutierrez, J. P.  

    Genetic trends for weight traits and their environmental variability were analysed in an experimental mice population selected during 17 generations to increase weight gain by comparing three selection methods: classic selection with random mating (Method A), classic weighted selection with random mating (Method B) and classic selection with minimum coancestry mating (Method C). Males were selected based on their own phenotypic records for WG. The analysis involved three traits: weight at 21 days (W21), weight at 42 days (W42) and weight gain between 21 and 42 days (WG). Genetic trends were obtained by averaging, within generations, the breeding values obtained for the traits and their environmental variability under a classical animal model assuming that the environmental variance is homogeneous and an alternative model assuming the heterogeneous environmental variance is partly under genetic control. All the genetic trends were positive for the traits and negative for their environmental variability but the trend in phenotypic variances was steady showing that the model analysing the environmental variability failed to separate correctly the genetic from the systematic effects under an artificial selection scenario. The higher additive genetic variance estimated under the heterogeneity model led to higher genetic trends when this model was used, thus changing the order of the preferred methods of selection moving Method B form intermediate to be the worst. The results also showed that correlated changes in the variability of weight gain and related traits originated as a consequence of selection process in the trait, but these changes do not seem to be unfavourable for the animals since the scale effect tends to compensate the correlated reduction in variability of these traits.
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  • Fast throughput, highly sensitive determination of allergenic disperse dyes in textile products by use of sample composition

    Garcia-Lavandeira, J.   Blanco, E.   Salgado, C.   Cela, R.  

    A simple, highly sensitive and fast procedure for the control of allergenic disperse dyes in textile products was optimized. The method is based on ultrasound assisted extraction of textile samples with 20 mL of methanol under controlled conditions (15 min, 70 degrees C) followed by separation and analysis by LC-MS-MS. The sample preparation process was optimized by means of a surface response experimental design and provided quantitative recoveries of dyes, much better than the poor recoveries provided by current standard procedures. The chromatographic separation was optimized by means of computer-assisted method development by use of a special chemometric tool developed specifically for LC-MS systems, as previously reported by the authors. The result is a rapid chromatographic procedure that enables accurate quantification, at very low concentrations, of all 23 allergenic and/or carcinogenic disperse dyes considered. Matrix effects in the LC-MS procedure were studied. Under the experimental conditions, both conventional and strategic sample composition are proposed as efficient procedures that reduce the costs and work involved in the control of allergenic dyes in finished textile products. The benefits of strategic sample composition are demonstrated by means of an example case study, and the pros and cons of preparing the composite samples from sample extracts or directly from textile products are discussed. (C) 2010 Elsevier B.V. All rights reserved.
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  • Evidence for the onset of color transparency in rho(0) electroproduction off nuclei

    El Fassi, L.   Zana, L.   Hafidi, K.   Holtrop, M.   Mustapha, B.   Brooks, W. K.   Hakobyan, H.   Zheng, X.   Adhikari, K. P.   Adikaram, D.   Aghasyan, M.   Amaryan, M. J.   Anghinolfi, M.   Arrington, J.   Avakian, H.   Baghdasaryan, H.   Battaglieri, M.   Batourine, V.   Bedlinskiy, I.   Biselli, A. S.   Bookwalter, C.   Branford, D.   Briscoe, W. J.   Bueltmann, S.   Burkert, V. D.   Carman, D. S.   Celentano, A.   Chandavar, S.   Cole, P. L.   Contalbrigo, M.   Crede, V.   D'Angelo, A.   Daniel, A.   Dashyan, N.   De Vita, R.   De Sanctis, E.   Deur, A.   Dey, B.   Dickson, R.   Djalali, C.   Dodge, G. E.   Doughty, D.   Dupre, R.   Egiyan, H.   El Alaoui, A.   Elouadrhiri, L.   Eugenio, P.   Fedotov, G.   Fegan, S.   Gabrielyan, M. Y.   Garcon, M.   Gevorgyan, N.   Gilfoyle, G. P.   Giovanetti, K. L.   Girod, F. X.   Goetz, J. T.   Gohn, W.   Golovatch, E.   Gothe, R. W.   Griffioen, K. A.   Guidal, M.   Guo, L.   Hanretty, C.   Heddle, D.   Hicks, K.   Holt, R. J.   Hyde, C. E.   Ilieva, Y.   Ireland, D. G.   Ishkhanov, B. S.   Isupov, E. L.   Jawalkar, S. S.   Keller, D.   Khandaker, M.   Khetarpal, P.   Kim, A.   Kim, W.   Klein, A.   Klein, F. J.   Kubarovsky, V.   Kuhn, S. E.   Kuleshov, S. V.   Kuznetsov, V.   Laget, J. M.   Lu, H. Y.   MacGregor, I. J. D.   Mao, Y.   Markov, N.   Mayer, M.   McAndrew, J.   McKinnon, B.   Meyer, C. A.   Mineeva, T.   Mirazita, M.   Mokeev, V.   Moreno, B.   Moutarde, H.   Munevar, E.   Nadel-Turonski, P.   Ni, A.   Niccolai, S.   Niculescu, G.   Niculescu, I.   Osipenkov, M.   Ostrovidov, A. I.   Pappalardo, L. L.   Paremuzyan, R.   Park, K.   Park, S.   Pasyuk, E.   Pereira, S. Anefalos   Phelps, E.   Pozdniakov, S.   Price, J. W.   Procureur, S.   Protopopescu, D.   Raue, B. A.   Reimer, P. E.   Ricco, G.   Rimal, D.   Ripani, M.   Ritchie, B. G.   Rosner, G.   Rossi, P.   Sabatie, F.   Saini, M. S.   Salgado, C.   Schott, D.   Schumacher, R. A.   Seraydaryan, H.   Sharabian, Y. G.   Smith, E. S.   Smith, G. D.   Sober, D. I.   Sokhan, D.   Stepanyan, S. S.   Stepanyan, S.   Stoler, P.   Strauch, S.   Taiuti, M.   Tang, W.   Taylor, C. E.   Tedeschi, D. J.   Tkachenko, S.   Ungaro, M.   Vernarsky, B.   Vineyard, M. F.   Voskanyan, H.   Voutier, E.   Watts, D.   Weinstein, L. B.   Weygand, D. P.   Wood, M. H.   Zachariou, N.   Zhao, B.   Zhao, Z. W.  

    We have measured the nuclear transparency of the incoherent diffractive A(e,e' rho(0)) process in C-12 and Fe-56 targets relative to H-2 using a 5 GeV electron beam. The nuclear transparency, the ratio of the produced rho(0,)s on a nucleus relative to deuterium, which is sensitive to rho A interaction, was studied as function of the coherence length (l(c)), a lifetime of the hadronic fluctuation of the virtual photon, and the four-momentum transfer squared (Q(2)). While the transparency for both C-12 and Fe-56 showed no lc dependence, a significant Q(2) dependence was measured, which is consistent with calculations that included the color transparency effects. (C) 2012 Elsevier B.V. All rights reserved.
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  • Preload dependence of gated cardiac SPECT-derived ventricular volumes in hemodialysis patients

    Jimenez-Heffernan, A.   Sanchez de Mora, E.   Salgado, C.   Lopez-Martin, J.   Ramos, C.   Rodriguez-Gomez, E.   Tobaruela, A.  

    In hemodialysis (HD) patients, the intravascular volume expansion of the pre-HD state leads to a high preload. We aim to examine its effect on myocardial perfusion gated SPECT (MPGS)-derived left ventricular (LV) volumes. The study comprised 50 end-stage renal disease (ESRD) patients on HD with normal 2-day stress/rest MPGS performed for kidney transplantation risk assessment. Patients (pts) comprised 23 men/27 women, with mean age of 59.4 +/- A 7.1 years. The time elapsed from the last HD session in hours was calculated on both days, and patients were classified according to whether it was higher (group A: 19 pts), lower (group B: 27 pts), or equal (group C: 4 pts) on the stress vs the rest day. End-diastolic, end-systolic volumes (EDV, ESV), and left ventricular ejection fraction (LVEF) were determined using QGS (TM) software. Transient ischemic dilation (TID) ratios were derived from the nongated images using QPS (TM) software. Volumes were significantly higher at stress in group A, at rest in group B, and similar in group C. TID ratios were significantly higher in group A vs groups B and C. MPGS-derived ventricular volumes are preload dependent. The high preload of the pre-HD state may mimic ischemic TID if occurring on the stress day and create confusion if coinciding with the rest day.
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  • Nuclear targets for a precision measurement of the neutral pion radiative width

    Martel, P.   Clinton, E.   McWilliams, R.   Lawrence, D.   Miskimen, R.   Ahmidouch, A.   Ambrozewicz, P.   Asratyan, A.   Baker, K.   Benton, L.   Bernstein, A.   Cole, P.   Collins, P.   Dale, D.   Danagoulian, S.   Davidenko, G.   Demirchyan, R.   Deur, A.   Dolgolenko, A.   Dzyubenko, G.   Evdokimov, A.   Feng, J.   Gabrielyan, M.   Gan, L.   Gasparian, A.   Glamazdin, O.   Goryachev, V.   Gyurjyan, V.   Hardy, K.   Ito, M.   Khandaker, M.   Kingsberry, P.   Kolarkar, A.   Konchatnyi, M.   Korchin, O.   Korsch, W.   Kowalski, S.   Kubantsev, M.   Kubarovsky, V.   Larin, I.   Matveev, V.   McNulty, D.   Milbrath, B.   Minehart, R.   Mochalov, V.   Mtingwa, S.   Nakagawa, I.   Overby, S.   Pasyuk, E.   Payen, M.   Pedroni, R.   Prok, Y.   Ritchie, B.   Salgado, C.   Sitnikov, A.   Sober, D.   Stephens, W.   Teymurazyan, A.   Underwood, J.   Vasiliev, A.   Verebryusov, V.   Vishnyakov, V.   Wood, M.  

    A technique is presented for precision measurements of the area densities, rho T, of approximately 5% radiation length carbon and (208)Pb targets used in an experiment at Jefferson Laboratory to measure the neutral pion radiative width. The precision obtained in the area density for the carbon target is +/- 0.050%, and that obtained for the lead target through an X-ray attenuation technique is +/- 0.43%. (C) 2009 Elsevier B.V. All rights reserved.
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  • Measurement of the nuclear multiplicity ratio for K(s)(0) hadronization at CLAS RID D-4072-2011

    Daniel, A.   Hicks, K.   Brooks, W. K.   Hakobyan, H.   Adhikari, K. P.   Adikaram, D.   Aghasyan, M.   Amarian, M.   Anghinolfi, M.   Avakian, H.   Baghdasaryan, H.   Battaglieri, M.   Batourine, V.   Bedlinskiy, I.   Bennett, R. P.   Biselli, A. S.   Bookwalter, C.   Briscoe, W. J.   Burkert, V. D.   Carman, D. S.   Casey, L.   Celentano, A.   Chandavar, S.   Cole, P. L.   Contalbrigo, M.   Crede, V.   D'Angelo, A.   Dashyan, N.   De Vita, R.   De Sanctis, E.   Deur, A.   Dey, B.   Dickson, R.   Djalali, C.   Dodge, G. E.   Doughty, D.   Egiyan, H.   El Fassi, L.   Elouadrhiri, L.   Eugenio, P.   Fedotov, G.   Fegan, S.   Gabrielyan, M. Y.   Gevorgyan, N.   Gilfoyle, G. P.   Giovanetti, K. L.   Girod, F. X.   Goetz, J. T.   Gohn, W.   Golovatch, E.   Gothe, R. W.   Griffioen, K. A.   Guidal, M.   Guo, L.   Hanretty, C.   Heddle, D.   Holtrop, M.   Hyde, C. E.   Ilieva, Y.   Ireland, D. G.   Ishkhanov, B. S.   Isupov, E. L.   Jawalkar, S. S.   Jo, H. S.   Joo, K.   Kalantarians, N.   Keller, D.   Khandaker, M.   Khetarpal, P.   Kim, A.   Kim, W.   Klein, A.   Klein, F. J.   Kubarovsky, V.   Kuleshov, S. V.   Kuznetsov, V.   Lu, N. Y.   MacGregor, I. J. D.   Mao, Y.   Markov, N.   Mayer, M.   McAndrew, J.   McKinnon, B.   Meyer, C. A.   Mineeva, T.   Mirazita, M.   Mokeev, V.   Moutarde, H.   Munevar, E.   Nadel-Turonski, P.   Ni, A.   Niccolai, S.   Niculescu, G.   Niculescu, I.   Osipenko, M.   Ostrovidov, A. I.   Paolone, M.   Pappalardo, L.   Paremuzyan, R.   Park, K.   Park, S.   Pasyuk, E.   Pereira, S. Anefalos   Phelps, E.   Pisano, S.   Pogorelko, O.   Pozdniakov, S.   Price, J. W.   Procureur, S.   Protopopescu, D.   Raue, B. A.   Ricco, G.   Rimal, D.   Ripani, M.   Rosner, G.   Rossi, P.   Sabatie, F.   Saini, M. S.   Salgado, C.   Schott, D.   Schumacher, R. A.   Seraydaryan, H.   Sharabian, Y. G.   Smith, G. D.   Sober, D. I.   Sokhan, D.   Stepanyan, S. S.   Stepanyan, S.   Strauch, S.   Taiuti, M.   Tang, W.   Taylor, C. E.   Tkachenko, S.   Ungaro, M.   Vernarsky, B.   Vineyard, M. F.   Voskanyan, H.   Voutier, E.   Watts, D. P.   Weinstein, L. B.   Weygand, D. P.   Wood, M. H.   Zana, L.   Zachariou, N.   Zhao, B.   Zhao, Z. W.  

    The influence of cold nuclear matter on lepto-production of hadrons in semi-inclusive deep inelastic scattering is measured using the CLAS detector in Hall B at Jefferson Lab and a 5.014 GeV electron beam. We report the K(s)(0) multiplicity ratios for targets of C, Fe, and Pb relative to deuterium as a function of the fractional virtual photon energy z transferred to the K(s)(0) and the transverse momentum squared p(T)(2). of the K(s)(0). We find that the multiplicity ratios for K(s)(0) are reduced in the nuclear medium at high z and low p(T)(2), with a trend for the K(s)(0) momentum to be broadened in the nucleus for large p(T)(2). (C) 2011 Elsevier B.V. All rights reserved.
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  • Measurement of the beam spin asymmetry of (e)over-right-arrowp -> e ' p 'eta ' in the deep-inelastic regime with CLAS

    Zhao, B.   Kim, A.   Joo, K.   Bedlinskiy, I   Kim, W.   Kubarovsky, V   Ungaro, M.   Adhikari, S.   Akbar, Z.   Angelini, G.   Avakian, H.   Ball, J.   Baltzell, N. A.   Barion, L.   Bashkanov, M.   Battaglieri, M.   Batourine, V   Biselli, A. S.   Boiarinov, S.   Briscoe, W. J.   Brooks, W. K.   Burkert, V. D.   Carman, D. S.   Celentano, A.   Chatagnon, R.   Chetry, T.   Ciullo, G.   Clark, L.   Clary, B. A.   Cole, P. L.   Contalbrigo, M.   Crede, V   D'Angelo, A.   Dashyan, N.   De Vita, R.   De Sanctis, E.   Defurne, M.   Deur, A.   Diehl, S.   Djalali, C.   Dupre, R.   Egiyan, H.   Ehrhart, M.   El Alaoui, A.   El Fassi, L.   Eugenio, R.   Filippi, A.   Forest, T. A.   Gavalian, G.   Ghandilyan, Y.   Gilfoyle, G. P.   Girod, F. X.   Golovatch, E.   Gothe, R. W.   Griffioen, K. A.   Guidal, M.   Guo, L.   Hafidi, K.   Hakobyan, H.   Harrison, N.   Hattawy, M.   Heddle, D.   Hicks, K.   Holtrop, M.   Ilieva, Y.   Ireland, D. G.   Ishkhanov, B. S.   Isupov, E. L.   Jenkins, D.   Jo, H. S.   Johnston, S.   Kabir, M. L.   Keller, D.   Khachatryan, G.   Khachatryana, M.   Khandaker, M.   Klein, A.   Klein, F. J.   Kuhn, S. E.   Kuleshov, S., V   Lanza, L.   Lenisa, R.   Livingston, K.   MacGregor, I. J. D.   Marchand, D.   Markov, N.   McKinnon, B.   Meyer, C. A.   Meziani, Z. E.   Mirazita, M.   Mokeev, V   Montgomery, R. A.   Camacho, C. Munoz   Nadel-Turonski, R.   Niccolai, S.   Niculescu, G.   Osipenko, M.   Ostrovidov, A., I   Paolone, M.   Paremuzyan, R.   Parke, K.   Pogorelko, O.   Price, J. W.   Prok, Y.   Protopopescu, D.   Ripani, M.   Rizzo, A.   Rosner, G.   Rossi, P.   Sabatie, F.   Salgado, C.   Schumacher, R. A.   Sharabian, Y. G.   Skorodumina, Iu   Smith, G. D.   Sokhan, D.   Sparveris, N.   Stepanyan, S.   Strakovsky, I   Strauch, S.   Taiuti, M.   Tan, J. A.   Voskanyan, H.   Voutier, E.   Wang, R.   Wei, X.   Wood, M. H.   Zachariou, N.   Zhang, J.   Zhao, Z. W.  

    The beam spin asymmetry of the exclusive pseudoscalar channel (e) over right arrowp -> e'p'eta was measured for the first time in the deep-inelastic regime (W > 2 GeV/c(2) and Q(2) > 1 GeV2/c(2)) using a longitudinally polarized 5.78 GeV electron beam at Jefferson Lab with the CEBAF Large Acceptance Spectrometer. The data were accumulated in 144 four-dimensional bins of Q(2), chi(B), -t and phi over a wide kinematic range, where phi is the azimuthal angle between the lepton and hadron scattering planes, The measured azimuthal dependence with large amplitudes of the sin phi moments is a clear indication of a substantial contribution to the polarized cross-section from transversely polarized virtual photons. In the framework of generalized parton distributions (GPDs) this contribution is expressed via longitudinal-transverse interference between chiral-even and chiral-odd GPDs. The experimental results are compared to the existing theoretical models demonstrating the sensitivity to the product of chiral-odd and chiral-even GPDs and provide new constraints to the existing GPD parameterizations. (C) 2019 The Authors. Published by Elsevier B.V.
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  • First results on nucleon resonance photocouplings from the gamma p -> pi(+)pi(-) p reaction

    Golovatch, E.   Burkert, V. D.   Carman, D. S.   Gothe, R. W.   Hicks, K.   Ishkhanov, B. S.   Mokeev, V. I.   Pasyuk, E.   Adhikari, S.   Akbar, Z.   Amaryan, M. J.   Avakian, H.   Ball, J.   Barion, L.   Bashkanov, M.   Battaglieri, M.   Bedlinskiy, I.   Biselli, A. S.   Boiarinov, S.   Briscoe, W. J.   Cao, F.   Celentano, A.   Chatagnon, P.   Chetry, T.   Ciullo, G.   Clark, L.   Clary, B. A.   Cole, P. L.   Contalbrigo, M.   Crede, V.   D'Angelo, A.   Dashyan, N.   DeVita, R.   DeSanctis, E.   Defurne, M.   Deur, A.   Diehl, S.   Djalali, C.   Dugger, M.   Dupre, R.   Egiyan, H.   Ehrhart, M.   ElAlaoui, A.   ElFassi, L.   Elouadrhiri, L.   Eugenio, P.   Fedotov, G.   Fersch, R.   Filippi, A.   Ghandilyan, Y.   Gilfoyle, G. P.   Giovanetti, K. L.   Girod, F. X.   Glazier, D. I.   Griffioen, K. A.   Guidal, M.   Guo, L.   Hafidi, K.   Hakobyan, H.   Harrison, N.   Hattawy, M.   Heddle, D.   Holtrop, M.   Ilieva, Y.   Ireland, D. G.   Isupov, E. L.   Jenkins, D.   Jo, H. S.   Johnston, S.   Joo, K.   Kabir, M. L.   Keller, D.   Khachatryan, G.   Khachatryan, M.   Khandaker, M.   Kim, W.   Klein, A.   Klein, F. J.   Kubarovsky, V.   Lanza, L.   Lenisa, P.   Livingston, K.   MacGregor, I. J. D.   Marchand, D.   Markov, N.   McKinnon, B.   Meyer, C. A.   Montgomery, R. A.   Movsisyan, A.   Munoz Camacho, C.   Nadel-Turonski, P.   Niccolai, S.   Niculescu, G.   Osipenko, M.   Ostrovidov, A. I.   Paolone, M.   Paremuzyan, R.   Park, K.   Pogorelko, O.   Price, J. W.   Prok, Y.   Protopopescu, D.   Ripani, M.   Riser, D.   Rizzo, A.   Rosner, G.   Sabatie, F.   Salgado, C.   Schumacher, R. A.   Sharabian, Y. G.   Skorodumina, Iu.   Smith, G. D.   Sober, D. I.   Sokhan, D.   Sparveris, N.   Strakovsky, I. I.   Strauch, S.   Taiuti, M.   Tan, J. A.   Tyler, N.   Ungaro, M.   Voskanyan, H.   Voutier, E.   Wang, R.   Wei, X.   Wood, M. H.   Zachariou, N.   Zhang, J.   Zhao, Z. W.  

    We report the first experimental measurements of the nine 1-fold differential cross sections for the gamma p ->pi(+)pi(-) p reaction, obtained with the CLAS detector at Jefferson Laboratory. The measurements cover the invariant mass range of the final state hadrons from 1.6 GeV < W < 2.0 GeV. For the first time the photocouplings of all prominent nucleon resonances in this mass range have been extracted from this exclusive channel. Photoproduction of two charged pions is of particular importance for the evaluation of the photocouplings for the Delta(1620)1/2(-) , Delta(1700)3/2(-) , N(1720)3/2(+), and Delta(1905)5/2(+) resonances, which have dominant decays into the pi pi N final states rather than the more extensively studied single meson decay channels. (C) 2018 The Author. Published by Elsevier B.V.
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  • Restricting inbreeding while maintaining selection response for weight gain in Mus musculus

    Moreno, A.   Salgado, C.   Piqueras, P.   Gutierrez, J. P.   Toro, M. A.   Ibanez-Escriche, N.   Nieto, B.  

    An experiment with mice was designed to test the relative efficiency of three selection methods that help to minimize the rate of inbreeding during selection. A common house mice (Mus musculus) population was selected for 17 generations to increase the weight gain between 21 and 42 days. The population was split at random into three lines A, B and C where three selection methods were applied: individual selection and random mating, weighted selection with random mating and individual selection with minimum coancestry mating, respectively. There were three replicates for each line. Cumulated selection response was similar in the three lines, but there were differences in the level of inbreeding attained (in percentage): 31.24 (method A), 24.72 (method B) and 27.88 (method C). As consequence, lines B and C (weighted selection and minimum coancestry) showed a lower value of deterioration of fitness traits (the intrauterine mortality and the mortality at birth) than line A (random mating).
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  • Photon beam asymmetry Sigma for eta and eta ' photoproduction from the proton

    Collins, P.   Ritchie, B. G.   Dugger, M.   Anisovich, A. V.   Doering, M.   Klempt, E.   Nikonov, V. A.   Roenchen, D.   Sadasivan, D.   Sarantsev, A.   Adhikari, K. P.   Akbar, Z.   Amaryan, M. J.   Pereira, S. Anefalos   Avakian, H.   Ball, J.   Balossino, I.   Bashkanov, M.   Battaglieri, M.   Bedlinskiy, I.   Biselli, A. S.   Briscoe, W. J.   Brooks, W. K.   Burkert, V. D.   Cao, Frank Thanh   Carman, D. S.   Celentano, A.   Chandavar, S.   Charles, G.   Chetry, T.   Ciullo, G.   Clark, L.   Colaneri, L.   Cole, P. L.   Compton, N.   Contalbrigo, M.   Cortes, O.   Crede, V.   D'Angelo, A.   Dashyan, N.   De Vita, R.   De Sanctis, E.   Deur, A.   Djalali, C.   Dupre, R.   Egiyan, H.   El Alaoui, A.   El Fassi, L.   Elouadrhiri, L.   Eugenio, P.   Fanchini, E.   Fedotov, G.   Filippi, A.   Fleming, J. A.   Ghandilyan, Y.   Gilfoyle, G. P.   Giovanetti, K. L.   Girod, F. X.   Glazier, D. I.   Gleason, C.   Golovatch, E.   Gothe, R. W.   Griffioen, K. A.   Guo, L.   Hafidi, K.   Hakobyan, H.   Hanretty, C.   Harrison, N.   Heddle, D.   Hicks, K.   Holtrop, M.   Hughes, S. M.   Ilieva, Y.   Ireland, D. G.   Ishkhanov, B. S.   Isupov, E. L.   Jenkins, D.   Jo, H. S.   Joosten, S.   Keller, D.   Khachatryan, G.   Khachatryan, M.   Khandaker, M.   Kim, A.   Kim, W.   Klein, A.   Klein, F. J.   Kubarovsky, V.   Lanza, L.   Lenisa, P.   Livingston, K.   MacGregor, I. J. D.   Markov, N.   McKinnon, B.   Meyer, C. A.   Mirazita, M.   Mokeev, V.   Montgomery, R. A.   Movsisyan, A.   Camacho, C. Munoz   Murdoch, G.   Nadel-Turonski, P.   Niccolai, S.   Niculescu, G.   Niculescu, I.   Osipenko, M.   Ostrovidov, A. I.   Paolone, M.   Paremuzyan, R.   Park, K.   Pasyuk, E.   Phelps, W.   Pisano, S.   Pogorelko, O.   Price, J. W.   Prok, Y.   Protopopescu, D.   Raue, B. A.   Ripani, M.   Rizzo, A.   Rosner, G.   Roy, P.   Sabatie, F.   Salgado, C.   Schumacher, R. A.   Sharabian, Y. G.   Skorodumina, Iu.   Smith, G. D.   Sokhan, D.   Sparveris, N.   Stepanyan, S.   Strakovsky, I. I.   Strauch, S.   Taiuti, M.   Tian, Ye   Torayev, B.   Ungaro, M.   Voskanyan, H.   Voutier, E.   Walford, N. K.   Wei, X.   Zachariou, N.   Zhang, J.  

    Measurements of the linearly-polarized photon beam asymmetry Sigma for photoproduction from the proton of eta and eta ' mesons are reported. A linearly-polarized tagged photon beam produced by coherent bremsstrahlung was incident on a cryogenic hydrogen target within the CEBAF Large Acceptance Spectrometer. Results are presented for the gamma p -> eta p reaction for incident photon energies from 1.070 to 1.876 GeV, and from 1.516 to 1.836 GeV for the gamma p -> eta ' p reaction. For gamma p -> eta p, the data reported here considerably extend the range of measurements to higher energies, and are consistent with the few previously published measurements for this observable near threshold. For gamma p -> eta ' p, the results obtained are consistent with the few previously published measurements for this observable near threshold, but also greatly expand the incident photon energy coverage for that reaction. Initial analysis of the data reported here with the Bonn-Gatchina model strengthens the evidence for four nucleon resonances - the N(1895)1/2(-), N(1900)3/2(+), N(2100)1/2(+) and N(2120)3/2(-) resonances which presently lack the "four-star" status in the current Particle Data Group compilation, providing examples of how these new measurements help refine models of the photoproduction process. (C) 2017 The Authors. Published by Elsevier B.V.
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  • Genetic parameters and relationships between fibre and type traits in two breeds of Peruvian alpacas RID B-7764-2009 RID B-3329-2010

    Cervantes, I.   Perez-Cabal, M. A.   Morante, R.   Burgos, A.   Salgado, C.   Nieto, B.   Goyache, F.   Gutierrez, J. P.  

    Four fibre traits (fibre diameter, FD; coefficient of variation of FD, comfort factor; and standard deviation of FD) were jointly analysed with six subjectively scored type traits (fleece density, crimp, lock structure, head, coverage, and balance) in two breeds of Peruvian Altiplano alpaca (Suri, SU: and Huacayo, HU) to ascertain their genetic relationship. A total of 2405 fibre records and 2194 type scores were available for the HU breed whereas these figures were 709 for fibre records and 650 for type scores for the SU breed. Estimated heritabilities for fibre traits were moderate to high, ranging from 0.565 to 0.699 in the SU breed and from 0.255 to 0.417 in the HU breed. Genetic and permanent environmental correlations between fibre related traits were extremely similar across breeds suggesting that these traits are fairly the same. Heritabilities estimated for the type traits tended to be lower than those estimated for the fibre traits particularly in the SU breed (ranging from 0.173 to 0.272). Fibre and type traits were, in general, genetically poorly correlated except for crimp in the HU breed, which had favourable correlations, from moderate to high, for fibre traits. In Altiplano areas in which fibre performance recording could not be implemented, crimp scoring makes it feasible to carry out mass selection in the Huacayo breed and furthermore include rural communities in national or regional selection programmes. (C) 2009 Elsevier B.V. All rights reserved
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  • Exclusive rho(0) electroproduction on the proton at CLAS RID E-8618-2010

    Morrow, S. A.   Guidal, M.   Garcon, M.   Laget, J. M.   Smith, E. S.   Adams, G.   Adhikari, K. P.   Aghasyan, M.   Amaryan, M. J.   Anghinolfi, M.   Asryan, G.   Audit, G.   Avakian, H.   Bagdasaryan, H.   Baillie, N.   Ball, J. P.   Baltzell, N. A.   Barrow, S.   Battaglieri, M.   Bedlinskiy, I.   Bektasoglu, M.   Bellis, M.   Benmouna, N.   Berman, B. L.   Biselli, A. S.   Blaszczyk, L.   Bonner, B. E.   Bookwalter, C.   Bouchigny, S.   Boiarinov, S.   Bradford, R.   Branford, D.   Briscoe, W. J.   Brooks, W. K.   Bueltmann, S.   Burkert, V. D.   Butuceanu, C.   Calarco, J. R.   Careccia, S. L.   Carman, D. S.   Carnahan, B.   Casey, L.   Cazes, A.   Chen, S.   Cheng, L.   Cole, P. L.   Collins, P.   Coltharp, P.   Cords, D.   Corvisiero, P.   Crabb, D.   Crannell, H.   Crede, V.   Cummings, J. P.   Dale, D.   Dashyan, N.   De Masi, R.   De Vita, R.   De Sanctis, E.   Degtyarenko, P. V.   Denizli, H.   Dennis, L.   Deur, A.   Dhamija, S.   Dharmawardane, K. V.   Dhuga, K. S.   Dickson, R.   Didelez, J. -P.   Djalali, C.   Dodge, G. E.   Doughty, D.   Dugger, M.   Dytman, S.   Dzyubak, O. P.   Egiyan, H.   Egiyan, K. S.   El Fassi, L.   Elouadrhiri, L.   Eugenio, P.   Fatemi, R.   Fedotov, G.   Fersch, R.   Feuerbach, R. J.   Forest, T. A.   Fradi, A.   Gavalian, G.   Gevorgyan, N.   Gilfoyle, G. P.   Giovanetti, K. L.   Girod, F. X.   Goetz, J. T.   Gohn, W.   Gordon, C. I. O.   Gothe, R. W.   Graham, L.   Griffioen, K. A.   Guillo, M.   Guler, N.   Guo, L.   Gyurjyan, V.   Hadjidakis, C.   Hafidi, K.   Hakobyan, H.   Hanretty, C.   Hardie, J.   Hassall, N.   Heddle, D.   Hersman, F. W.   Hicks, K.   Hleiqawi, I.   Holtrop, M.   Hourany, E.   Hyde-Wright, C. E.   Ilieva, Y.   Ireland, D. G.   Ishkhanov, B. S.   Isupov, E. L.   Ito, M. M.   Jenkins, D.   Jo, H. S.   Johnstone, J. R.   Joo, K.   Juengst, H. G.   Kalantarians, N.   Keller, D.   Kellie, J. D.   Khandaker, M.   Khetarpal, P.   Kim, W.   Klein, A.   Klein, F. J.   Klimenko, A. V.   Kossov, M.   Kramer, L. H.   Kubarovsky, V.   Kuhn, J.   Kuhn, S. E.   Kuleshov, S. V.   Kuznetsov, V.   Lachniet, J.   Langheinrich, J.   Lawrence, D.   Li, Ji   Livingston, K.   Lu, H. Y.   MacCormick, M.   Marchand, C.   Markov, N.   Mattione, P.   McAleer, S.   McCracken, M.   McKinnon, B.   McNabb, J. W. C.   Mecking, B. A.   Mehrabyan, S.   Melone, J. J.   Mestayer, M. D.   Meyer, C. A.   Mibe, T.   Mikhailov, K.   Minehart, R.   Mirazita, M.   Miskimen, R.   Mokeev, V.   Morand, L.   Moreno, B.   Moriya, K.   Moteabbed, M.   Mueller, J.   Munevar, E.   Mutchler, G. S.   Nadel-Turonski, P.   Nasseripour, R.   Niccolai, S.   Niculescu, G.   Niculescu, I.   Niczyporuk, B. B.   Niroula, M. R.   Niyazov, R. A.   Nozar, M.   O'Rielly, G. V.   Osipenko, M.   Ostrovidov, A. I.   Park, K.   Park, S.   Pasyuk, E.   Paterson, C.   Pereira, S. Anefalos   Philips, S. A.   Pierce, J.   Pivnyuk, N.   Pocanic, D.   Pogorelko, O.   Polli, E.   Popa, I.   Pozdniakov, S.   Preedom, B. M.   Price, J. W.   Procureur, S.   Prok, Y.   Protopopescu, D.   Qin, L. M.   Raue, B. A.   Riccardi, G.   Ricco, G.   Ripani, M.   Ritchie, B. G.   Rosner, G.   Rossi, P.   Rubin, P. D.   Sabatie, F.   Saini, M. S.   Salamanca, J.   Salgado, C.   Santoro, J. P.   Sapunenko, V.   Schott, D.   Schumacher, R. A.   Serov, V. S.   Sharabian, Y. G.   Sharov, D.   Shvedunov, N. V.   Skabelin, A. V.   Smith, L. C.   Sober, D. I.   Sokhan, D.   Stavinsky, A.   Stepanyan, S. S.   Stepanyan, S.   Stokes, B. E.   Stoler, P.   Strakovsky, I. I.   Strauch, S.   Taiuti, M.   Tedeschi, D. J.   Tkabladze, A.   Tkachenko, S.   Todor, L.   Tur, C.   Ungaro, M.   Vineyard, M. F.   Vlassov, A. V.   Watts, D. P.   Weinstein, L. B.   Weygand, D. P.   Williams, M.   Wolin, E.   Wood, M. H.   Yegneswaran, A.   Yurov, M.   Zana, L.   Zhang, J.   Zhao, B.   Zhao, Z. W.  

    The ep -> e'pp(0) reaction has been measured using the 5.754 GeV electron beam of Jefferson Lab and the CLAS detector. This represents the largest ever set of data for this reaction in the valence region. Integrated and differential cross-sections are presented. The W, Q(2) and t dependences of the cross-section are compared to theoretical calculations based on the t-channel meson-exchange Regge theory, on the one hand, and on quark handbag diagrams related to Generalized Parton Distributions (GPDs) on the other hand. The Regge approach can describe at the approximate to 30% level most of the features of the present data while the two GPD calculations that are presented in this article which succesfully reproduce the high-energy data strongly underestimate the present data. The question is then raised whether this discrepancy originates from an incomplete or inexact way of modelling the GPDs or the associated hard scattering amplitude or whether the GPD formalism is simply inapplicable in this region due to higher-twists contributions, incalculable at present.
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  • 06/00947 Carbon supported Pt70Co30 electrocatalyst prepared by the formic acid method for the oxygen reduction reaction in polymer electrolyte fuel cells: Salgado, J. R. C. et al. Journal of Power Sources, 2005, 141, (1), 13–18.

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  • Efficacy and safety of withholding antimicrobial treatment in children with cancer,fever and neutropenia,with a demonstrated viral respiratory infection:a randomized clinical trial

    Santolaya, M. E.   Alvarez, A. M.   Acuna, M.   Aviles, C. L.   Salgado, C.   Tordecilla, J.   Varas, M.   Venegas, M.   Villarroel, M.   Zubieta, M.   Toso, A.   Bataszew, A.   Farfan, M. J.   de la Maza, V.   Vergara, A.   Valenzuela, R.   Torres, J. P.  

    Objectives: To determine efficacy and safety of withholding antimicrobials in children with cancer, fever and neutropenia (FN) with a demonstrated respiratory viral infection. Methods: Prospective, multicentre, randomized study in children presenting with FN at five hospitals in Santiago, Chile, evaluated at admission for diagnosis of bacterial and viral pathogens including PCRmicroarray for 17 respiratory viruses. Children positive for a respiratory virus, negative for a bacterial pathogen and with a favourable evolution after 48 h of antimicrobial therapy were randomized to either maintain or withhold antimicrobials. Primary endpoint was percentage of episodes with uneventful resolution. Secondary endpoints were days of fever/hospitalization, bacterial infection, sepsis, admission to paediatric intensive care unit (PICU) and death. Results: A total of 319 of 951 children with FN episodes recruited between July 2012 and December 2015 had a respiratory virus as a unique identified microorganism, of which 176 were randomized, 92 to maintain antimicrobials and 84 to withdraw. Median duration of antimicrobial use was 7 days (range 7 e9 days) versus 3 days (range 3-4 days), with similar frequency of uneventful resolution (89/92 (97%) and 80/84 (95%), respectively, not significant; OR 1.48; 95% CI 0.32-6.83, p 0.61), and similar number of days of fever (2 versus 1), days of hospitalization (6 versus 6) and bacterial infections throughout the episode (2% e1%), with one case of sepsis requiring admission to PICU in the group that maintained antimicrobials, without any deaths. Conclusions: The reduction of antimicrobials in children with FN and respiratory viral infections, based on clinical and microbiological/molecular diagnostic criteria, should favour the adoption of evidencebased management strategies in this population. (C) 2016 European Society of Clinical Microbiology and Infectious Diseases. Published by Elsevier Ltd. All rights reserved.
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  • An investigation of C,N,and Na abundances in red giant stars of the Sculptor dwarf spheroidal galaxy

    Salgado, C.   Da Costa, G. S.   Norris, J. E.   Yong, D.  

    The origin of the star-to-star abundance variations found for the light elements in Galactic globular clusters (GGCs) is not well understood, which is a significant problem for stellar astrophysics. While the light element abundance variations are very common in globular clusters, they are comparatively rare in the Galactic halo field population. However, little is known regarding the occurrence of the abundance anomalies in other environments such as that of dwarf spheroidal (dSph) galaxies. Consequently, we have investigated the anticorrelation and bimodality of CH- and CN-band strengths, which are markers of the abundance variations in GGCs, in the spectra of red giants in the Sculptor dwarf spheroidal galaxy. Using spectra at the Na D lines, informed by similar spectra for five GGCs (NGC 288, 1851, 6752, 6809, and 7099), we have also searched for any correlation between CN and Na in the Sculptor red giant sample. Our results indicate that variations analogous to those seen in GGCs are not present in our Sculptor sample. Instead, we find a weak positive correlation between CH and CN and no correlation between Na and CN. We also reveal a deficiency in [Na/Fe] for the Sculptor stars relative to the values in GGCs, a result that is consistent with the previous work for dSph galaxies. The outcomes reinforce the apparent need for a high stellar density environment to produce the light element abundance variations.
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  • Evidence for a backward peak in the gamma d -> pi(0)d cross section near the eta threshold RID E-8618-2010 RID B-4083-2012

    Ilieva, Y.   Berman, B. L.   Kudryavtsev, A. E.   Strakovsky, I. I.   Tarasov, V. E.   Amarian, M.   Ambrozewicz, P.   Anghinolfi, M.   Asryan, G.   Avakian, H.   Bagdasaryan, H.   Baillie, N.   Ball, J. P.   Baltzell, N. A.   Batourine, V.   Battaglieri, M.   Bedlinskiy, I.   Bellis, M.   Benmouna, N.   Biselli, A. S.   Bouchigny, S.   Boiarinov, S.   Bradford, R.   Branford, D.   Briscoe, W. J.   Brooks, W. K.   Bueltmann, S.   Burkert, V. D.   Butuceanu, C.   Calarco, J. R.   Careccia, S. L.   Carman, D. S.   Chen, S.   Cole, P. L.   Collins, P.   Coltharp, P.   Crabb, D.   Crede, V.   De Masi, R.   De Sanctis, E.   De Vita, R.   Degtyarenko, P. V.   Deur, A.   Dickson, R.   Djalali, C.   Dodge, G. E.   Donnelly, J.   Doughty, D.   Dugger, M.   Dzyubak, O. P.   Egiyan, H.   Egiyan, K. S.   Elouadrhiri, L.   Eugenio, P.   Fedotov, G.   Feldman, G.   Funsten, H.   Garcon, M.   Gavalian, G.   Gilfoyle, G. P.   Giovanetti, K. L.   Girod, F. X.   Goetz, J. T.   Gonenc, A.   Gothe, R. W.   Griffioen, K. A.   Guidal, M.   Guler, N.   Guo, L.   Gyurjyan, V.   Hafidi, K.   Hakobyan, R. S.   Hersman, F. W.   Hicks, K.   Hleiqawi, I.   Holtrop, M.   Hyde-Wright, C. E.   Ireland, D. G.   Ishkhanov, B. S.   Isupov, E. L.   Ito, M. M.   Jenkins, D.   Jo, H. S.   Joo, K.   Juengst, H. G.   Kalantarians, N.   Kellie, J. D.   Khandaker, M.   Kim, W.   Klein, A.   Klein, F. J.   Kossov, M.   Krahn, Z.   Kramer, L. H.   Kubarovsky, V.   Kuhn, J.   Kuhn, S. E.   Kuleshov, S. V.   Lachniet, J.   Laget, J. M.   Langheinrich, J.   Lawrence, D.   Livingston, K.   Lu, H.   MacCormick, M.   Markov, N.   McKinnon, B.   Mecking, B. A.   Mestayer, M. D.   Meyer, C. A.   Mibe, T.   Mikhailov, K.   Mirazita, M.   Miskimen, R.   Mokeev, V.   Moriya, K.   Morrow, S. A.   Moteabbed, M.   Munevar, E.   Mutchler, G. S.   Nadel-Turonski, P.   Nasseripour, R.   Niccolai, S.   Niculescu, G.   Niculescu, I.   Niczyporuk, B. B.   Niroula, M. R.   Niyazov, R. A.   Nozar, M.   Osipenko, M.   Ostrovidov, A. I.   Park, K.   Pasyuk, E.   Paterson, C.   Pierce, J.   Pivnyuk, N.   Pogorelko, O.   Pozdniakov, S.   Price, J. W.   Prok, Y.   Protopopescu, D.   Raue, B. A.   Ricco, G.   Ripani, M.   Ritchie, B. G.   Ronchetti, F.   Rosner, G.   Rossi, P.   Sabatie, F.   Salgado, C.   Santoro, J. P.   Sapunenko, V.   Schumacher, R. A.   Serov, V. S.   Sharabian, Y. G.   Shvedunov, N. V.   Smith, E. S.   Smith, L. C.   Sober, D. I.   Stavinsky, A.   Stepanyan, S. S.   Stepanyan, S.   Stokes, B. E.   Stoler, P.   Strauch, S.   Taiuti, M.   Tedeschi, D. J.   Thoma, U.   Tkabladze, A.   Tkachenko, S.   Tur, C.   Ungaro, M.   Vineyard, M. F.   Vlassov, A. V.   Watts, D. P.   Weinstein, L. B.   Weygand, D. P.   Williams, M.   Wolin, E.   Wood, M. H.   Yegneswaran, A.   Zana, L.   Zhang, J.   Zhao, B.   Zhao, Z.  

    High-quality cross sections for the reaction gamma d -> pi(0)d have been measured using the CLAS at Jefferson Lab over a wide energy range near and above the eta-meson photoproduction threshold. At backward c.m. angles for the outgoing pions, we observe a resonance-like structure near E(gamma) = 700 MeV. Our model analysis shows that it can be explained by eta excitation in the intermediate state. The effect is the result of the contribution of the N(1535) S(11)-resonance to the amplitudes of the subprocesses occurring between the two nucleons and of a two-step process in which the excitation of an intermediate eta-meson dominates.
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