New Analysis of Threshold Photoproduction Data from MAMI

In this talk I will review the recently published results by the A2 and CB-TAPS Collaborations at MAMI on neutral pion photoproduction in the near-threshold region. The combined measurement of the differential cross section and the photon beam asymmetry with low statistical errors allowed for a precise determination of the energy dependence of the real parts of the S- and P-wave amplitudes for the first time, providing the most stringent test to date of the predictions of Chiral Perturbation Theory and its energy region of agreement with experiment.Comment: 4 pages. Contribution to the 13th International Conference on Meson-Nucleon Physics and the Structure of the Nucleon (MENU 2013), Rome, September-October 201

Responsabilidad social y programas sociales de las organizaciones de las barras organizadas de fútbol de Lima Metropolitana 2023

El estudio planteó como objetivo determinar la relación entre la responsabilidad social con los programas sociales de los hinchas organizados de Alianza Lima en el Cercado de Lima, 2023. Para ello, se desarrolló un estudio de diseño no experimental transversal, con enfoque cuantitativo y de nivel correlacional. Se tuvo como población a los hinchas de la Barra Cercado Grone de Alianza Lima, conformando una muestra de 71 miembros de las barras organizadas, se empleó como instrumento de medición un cuestionario digital a través de la técnica del encuestado. Se obtuvo una confiabilidad de Alfa de Cronbach de ,974. Los resultados fueron obtenidos de aplicar la prueba de Spearman para demostrar la hipótesis. Concluyéndose que existe relación entre la responsabilidad social con los programas sociales de los hinchas organizados de Alianza Lima en el Cercado de Lima, 2023. Lo cual se demostró con una prueba de Spearman=0,687 calificado como positiva moderada, y valor de sig=0.00 siendo < 0.05)

Fast, ultra-trace detection of juvenile hormone III from mosquitoes using mass spectrometry

In the present work, a new protocol for fast separation and quantification of JH III from biological samples using liquid chromatography coupled to electrospray tandem mass spectrometry is described. In particular, the proposed protocol improves existing methodologies by combining a limited number of sample preparation steps with fast LC-MS/MS detection, providing lower limits of detection and demonstrated matrix effect control, together with high inter and intraday reproducibility. A limit of detection of 8 pg/mL (0.32 pg on column) was achieved, representing a 15-fold gain in sensitivity with respect to previous LC-MS based protocols. The performance of the LC-MS/MS protocol is comparable to previously described JH III quantitation protocol based on fluorescence detection, with the added advantage that quantification is independent of the availability of fluorescent tags that are often unavailable or show quite diverse responses on a batch-to-batch basis. Additionally, a detailed description of the JH III fragmentation pathway is provided for the first time, based on isolation of the molecular ion and their intermediate fragments using in-source MS/MS, MS/MSn and FT-ICR MS/MS measurements. The JH III workflow was evaluated as a function of developmental changes, sugar feeding and farnesoic acid stimulation in mosquitoes and can be applied to the detection of other juvenile hormones

Locus of Control in Mexican University Students Comparisons by Gender

The aim of this research was to compare the profiles of locus of control in Mexican university students. The total sample was of 1537 subjects; 820 women and 717 men, with a mean age of 20.38 years (SD = 1.81) and 20.78 years (SD = 1.94) respectively. The approach adopted in the research is framed within a quantitative approach with a survey descriptive design. The results of the multivariate analysis of variance, followed by the univariate variance analyzes, are the ones who show higher levels of external locus of control in the factors of luck, political power, destiny and interpersonal relationships, while men report higher levels of locus as luck external control, political power, destination and interpersonal relationships. The differences found between men and women regarding the locus of control, suggest that when designing any intervention that aims to strengthen the internal locus of control will have to take into account the gender variable

The juvenile hormone described in Rhodnius prolixus by Wigglesworth is juvenile hormone III skipped bisepoxide

Juvenile hormones (JHs) are sesquiterpenoids synthesized by the corpora allata (CA). They play critical roles during insect development and reproduction. The frst JH was described in 1934 as a “metamorphosis inhibitory hormone” in Rhodnius prolixus by Sir Vincent B. Wigglesworth. Remarkably, in spite of the importance of R. prolixus as vectors of Chagas disease and model organisms in insect physiology, the original JH that Wigglesworth described for the kissing-bug R. prolixus remained unidentifed. We employed liquid chromatography mass spectrometry to search for the JH homologs present in the hemolymph of fourth instar nymphs of R. prolixus. Wigglesworth’s original JH is the JH III skipped bisepoxide (JHSB3), a homolog identifed in other heteropteran species. Changes in the titer of JHSB3 were studied during the 10-day long molting cycle of 4th instar nymph, between a blood meal and the ecdysis to 5th instar. In addition we measured the changes of mRNA levels in the CA for the 13 enzymes of the JH biosynthetic pathway during the molting cycle of 4th instar. Almost 90 years after the frst descriptions of the role of JH in insects, this study fnally reveals that the specifc JH homolog responsible for Wigglesworth’s original observations is JHSB3.Fil: Villalobos Sambucaro, María José. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Cátedra de Histología y Embriología Animal; ArgentinaFil: Nouzova, Marcela. Florida International University; Estados UnidosFil: Ramirez, Cesar E.. Florida International University; Estados UnidosFil: Alzugaray, Maria Eugenia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata; Argentina. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Cátedra de Histología y Embriología Animal; ArgentinaFil: Fernandez-Lima, Francisco. Florida International University; Estados UnidosFil: Ronderos, Jorge Rafael. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. Cátedra de Histología y Embriología Animal; ArgentinaFil: Noriega, Fernando. Florida International University; Estados Unido

Double Polarization Observables in Pentaquark Photoproduction

We investigate the properties of the hidden charm pentaquark-like resonances first observed by LHCb in 2015, by measuring the polarization transfer KLL between the incident photon and the outgoing proton in the exclusive photoproduction of J/psi near threshold. We present a first estimate of the sensitivity of this observable to the pentaquark photocouplings and hadronic branching ratios, and extend our predictions to the case of initial state helicity correlation ALL, using a polarized target. These results serve as a benchmark for the SBS experiment at Jefferson Lab, which proposes to measure for the first time the helicity correlations ALL and KLL in J/psi exclusive photoproduction, in order to determine the pentaquark photocouplings and branching ratios.Comment: 9 pages, 7 figures, 2 tables, Version published in PR

The juvenile hormone described in <i>Rhodnius prolixus</i> by Wigglesworth is juvenile hormone III skipped bisepoxide

Juvenile hormones (JHs) are sesquiterpenoids synthesized by the corpora allata (CA). They play critical roles during insect development and reproduction. The first JH was described in 1934 as a "metamorphosis inhibitory hormone" in Rhodnius prolixus by Sir Vincent B. Wigglesworth. Remarkably, in spite of the importance of R. prolixus as vectors of Chagas disease and model organisms in insect physiology, the original JH that Wigglesworth described for the kissing-bug R. prolixus remained unidentified. We employed liquid chromatography mass spectrometry to search for the JH homologs present in the hemolymph of fourth instar nymphs of R. prolixus. Wigglesworth's original JH is the JH III skipped bisepoxide (JHSB3), a homolog identified in other heteropteran species. Changes in the titer of JHSB3 were studied during the 10-day long molting cycle of 4th instar nymph, between a blood meal and the ecdysis to 5th instar. In addition we measured the changes of mRNA levels in the CA for the 13 enzymes of the JH biosynthetic pathway during the molting cycle of 4th instar. Almost 90 years after the first descriptions of the role of JH in insects, this study finally reveals that the specific JH homolog responsible for Wigglesworth's original observations is JHSB3.Facultad de Ciencias Naturales y MuseoConsejo Nacional de Investigaciones Científicas y Técnica

Pasturas estivales en el sur de Corrientes

Este libro se basa en una experiencia de validación a campo, surgida de la iniciativa de un productor miembro del grupo CREA Curuzú Cuatiá. La idea fue generar información de pasturas, para solucionar una problemática forrajera del sistema productivo. Para ello, se decide trabajar en conjunto con INTA y de esta forma dar el mayor rigor posible a las mediciones, de manera de valorizar el esfuerzo realizado.EEA MercedesFil: Barbera, Pablo. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Mercedes (Corrientes); ArgentinaFil: Benitez, Julio Cesar. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Mercedes (Corrientes); ArgentinaFil: Pizzio, Rafael Mario. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Mercedes (Corrientes); ArgentinaFil: Maidana, Carlos Emilio. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Mercedes (Corrientes); ArgentinaFil: Escalante, María Susana. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Mercedes (Corrientes); ArgentinaFil: Bendersky, Diego. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Mercedes (Corrientes); ArgentinaFil: Mc Lean, Guillermo Donald. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Mercedes (Corrientes); ArgentinaFil: Tamborelli, Melina Rut. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Mercedes (Corrientes); ArgentinaFil: Ramírez, Ricardo Ramón. Actividad privada; ArgentinaFil: Ramirez, Ramón Ricardo. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Mercedes (Corrientes); ArgentinaFil: Ramirez, Mario Alberto. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Mercedes (Corrientes); ArgentinaFil: Maidana, Carlos Eduardo. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Mercedes (Corrientes); ArgentinaFil: Zapata, Patricio José. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Mercedes (Corrientes); ArgentinaFil: Fernandez, Juan Ramón. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Mercedes (Corrientes); ArgentinaFil: Beccaria, Mauricio Daniel. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Mercedes (Corrientes). Agencia De Extensión Rural Curuzú Cuatiá; ArgentinaFil: Preisz, Victor Hernan. Instituto Nacional de Tecnología Agropecuaria (INTA). Estación Experimental Agropecuaria Mercedes (Corrientes). Agencia De Extensión Rural Curuzú Cuatiá; Argentin