Technological properties of maize tortillas produced by microwave nixtamalization with variable alkalinity

This research was conducted to determine the quality, physicochemical, textural, compositional, nutritional, viscoamylographic and sensory properties of maize tortillas produced with a Modified tortilla-making process (MTMP) of variable alkalinity (0.125, 0.25 and 0.5% Ca(OH)2 w/w) and compared to the commercial brand MASECA ®. In general, tortillas from MTMP showed higher pH, total color difference (ΔE), tensile strength/cutting force, protein, lipids, crude fibre, lysine, tryptophan, in vitro protein digestibility and lower Hunter L value, loss of weight during cooking and moisture content than MASECA® tortillas. No significant differences were found in the sensory analysis of 22 descriptors of tortillas made from MASECA® and MTMP with Ca(OH)2 concentrations of 0.125 and 0.25% (w/w). However, panelist identified principal effects on changes in four attributes (aroma, appearance, flavor, and after taste flavor) and seven descriptors in tortillas from MTMP prepared with the maximum lime concentration (0.5% w/w). Microwave nixtamalization produce tortillas with acceptable physicochemical, textural, quality, compositional/nutritional and pasting properties.Key words: Maize, modified nixtamalization, tortillas, technological properties

Generalizabilidad y Gestión Deportiva

La gestión de la calidad es un proceso imprescindible en cualquierempresa, especialmente en servicios. Este proceso lleva aparejado elconsumo de recursos, y gestionarlos de forma óptima implica tomar decisionessobre el muestreo de la opinión de usuarios y clientes. En este artículose presenta el análisis de Generalizabilidad como una de las técnicas quepueden ayudar en la toma de decisiones sobre el muestreo en la opinión deusuarios y clientes. Se presentan dos estudios, uno de carácter cuantitativoy otro perteneciente a los diseños mixed methods. En el primer estudio participaronun total de 738 participantes, se utilizó la adaptación del Cuestionariode Evaluación de la Calidad Percibida en Servicios Deportivos (CECASDEPMEX v.1). En la primera muestra participaron 381 participantesde ambos géneros, 189 hombres (49.6%) y 182 mujeres (47.8%), valoresperdidos 10 (2.6%). El rango de edad está entre 14 y 69 años (M= 28.26), ytodos son usuarios activos de las entidades deportivas universitarias. En lasegunda muestra utilizada participaron 357 participantes de ambos géneros,(156 hombres (43.7%) y 195 mujeres (54.6%), valores perdidos 6 (1.7%)).El rango de edad está entre 14 y 61 años (M= 24.76), y todos son usuariosactivos de las entidades deportivas universitarias. En el segundo estudiose integraron de forma complementaria datos cualitativos y cuantitativos,siguiendo los planteamientos de los mixed methods. La recogida de los datoscualitativos se ha realizado mediante entrevistas individuales y los cuantitativosa través del análisis de reconocimiento facial de emociones. La muestrala formaron 29 participantes (n=29), niños/as con edades comprendidas entrelos 5 a 12 años. El muestreo fue de carácter aleatorio y estratificado conasignación proporcional. En ambos estudios se realizó una optimización delos diseños de medida a través de un análisis de generalizabilidad utilizandoel programa SAGT

Procesos de gentrificación, despojo urbano y elitización del espacio en el zona centro de Guadalajara

En el siguiente documento se rescató la experiencia, el aprendizaje y los hallazgos del Proyecto de Aplicación Profesional: Observatorio en ruta, el cual se basó en una investigación urbana en el centro histórico de Guadalajara con el fin de observar el proceso de gentrificación que gracias a los proyectos urbanísticos de la zona ocurre. Con una metodología de investigación cualitativa se realizó trabajo de campo, análisis documental, seminarios especializados en temáticas urbanas/sociales, entrevistas y documentación audiovisual. El grupo conformado por arquitectos y psicólogas logró tener mayor alcance del Centro histórico de Guadalajara dividiéndolo en cuatro cuadrantes (Refugio, Mezquitan, Mexicaltzingo y Mercado Corona-Centro) en los que en cada uno existe un proyecto grande que busca rehabilitar y modificar el centro.ITESO, A.C

Observatorio ENRUTA: Procesos de gentrificación, despojo urbano y elitización del espacio en la zona centro de Guadalajara

En el siguiente documento se rescató la experiencia, el aprendizaje y los hallazgos del Proyecto de Aplicación Profesional: Observatorio En Ruta, el cual se basó en una investigación urbana en el centro histórico de Guadalajara con el fin de observar el proceso de gentrificación que gracias a los proyectos urbanísticos de la zona ocurre. Con una metodología de investigación cualitativa se realizó trabajo de campo, análisis documental, seminarios especializados en temáticas urbanas/sociales, entrevistas y documentación audiovisual. El grupo conformado por arquitectos y psicólogas logró tener mayor alcance del Centro histórico de Guadalajara dividiéndolo en cuatro cuadrantes (Refugio, Mezquitan, Santuario y Mercado Corona-Centro) en los que en cada uno existe un proyecto grande que busca rehabilitar y modificar el centro.ITESO, A.C

Low-Energy Physics in Neutrino LArTPCs

In this white paper, we outline some of the scientific opportunities and challenges related to detection and reconstruction of low-energy (less than 100 MeV) signatures in liquid argon time-projection chamber (LArTPC) detectors. Key takeaways are summarized as follows. 1) LArTPCs have unique sensitivity to a range of physics and astrophysics signatures via detection of event features at and below the few tens of MeV range. 2) Low-energy signatures are an integral part of GeV-scale accelerator neutrino interaction final states, and their reconstruction can enhance the oscillation physics sensitivities of LArTPC experiments. 3) BSM signals from accelerator and natural sources also generate diverse signatures in the low-energy range, and reconstruction of these signatures can increase the breadth of BSM scenarios accessible in LArTPC-based searches. 4) Neutrino interaction cross sections and other nuclear physics processes in argon relevant to sub-hundred-MeV LArTPC signatures are poorly understood. Improved theory and experimental measurements are needed. Pion decay-at-rest sources and charged particle and neutron test beams are ideal facilities for experimentally improving this understanding. 5) There are specific calibration needs in the low-energy range, as well as specific needs for control and understanding of radiological and cosmogenic backgrounds. 6) Novel ideas for future LArTPC technology that enhance low-energy capabilities should be explored. These include novel charge enhancement and readout systems, enhanced photon detection, low radioactivity argon, and xenon doping. 7) Low-energy signatures, whether steady-state or part of a supernova burst or larger GeV-scale event topology, have specific triggering, DAQ and reconstruction requirements that must be addressed outside the scope of conventional GeV-scale data collection and analysis pathways

Low exposure long-baseline neutrino oscillation sensitivity of the DUNE experiment

The Deep Underground Neutrino Experiment (DUNE) will produce world-leading neutrino oscillation measurements over the lifetime of the experiment. In this work, we explore DUNE's sensitivity to observe charge-parity violation (CPV) in the neutrino sector, and to resolve the mass ordering, for exposures of up to 100 kiloton-megawatt-years (kt-MW-yr). The analysis includes detailed uncertainties on the flux prediction, the neutrino interaction model, and detector effects. We demonstrate that DUNE will be able to unambiguously resolve the neutrino mass ordering at a 3$\sigma$ (5$\sigma$) level, with a 66 (100) kt-MW-yr far detector exposure, and has the ability to make strong statements at significantly shorter exposures depending on the true value of other oscillation parameters. We also show that DUNE has the potential to make a robust measurement of CPV at a 3$\sigma$ level with a 100 kt-MW-yr exposure for the maximally CP-violating values \delta_{\rm CP}} = \pm\pi/2. Additionally, the dependence of DUNE's sensitivity on the exposure taken in neutrino-enhanced and antineutrino-enhanced running is discussed. An equal fraction of exposure taken in each beam mode is found to be close to optimal when considered over the entire space of interest

Long-baseline neutrino oscillation physics potential of the DUNE experiment

The sensitivity of the Deep Underground Neutrino Experiment (DUNE) to neutrino oscillation is determined, based on a full simulation, reconstruction, and event selection of the far detector and a full simulation and parameterized analysis of the near detector. Detailed uncertainties due to the flux prediction, neutrino interaction model, and detector effects are included. DUNE will resolve the neutrino mass ordering to a precision of 5σ, for all ΑCP values, after 2 years of running with the nominal detector design and beam configuration. It has the potential to observe charge-parity violation in the neutrino sector to a precision of 3σ (5σ) after an exposure of 5 (10) years, for 50% of all ΑCP values. It will also make precise measurements of other parameters governing long-baseline neutrino oscillation, and after an exposure of 15 years will achieve a similar sensitivity to sin22θ13 to current reactor experiments

First results on ProtoDUNE-SP liquid argon time projection chamber performance from a beam test at the CERN Neutrino Platform

The ProtoDUNE-SP detector is a single-phase liquid argon time projection chamber with an active volume of 7.2× 6.1× 7.0 m3. It is installed at the CERN Neutrino Platform in a specially-constructed beam that delivers charged pions, kaons, protons, muons and electrons with momenta in the range 0.3 GeV/c to 7 GeV/c. Beam line instrumentation provides accurate momentum measurements and particle identification. The ProtoDUNE-SP detector is a prototype for the first far detector module of the Deep Underground Neutrino Experiment, and it incorporates full-size components as designed for that module. This paper describes the beam line, the time projection chamber, the photon detectors, the cosmic-ray tagger, the signal processing and particle reconstruction. It presents the first results on ProtoDUNE-SP\u27s performance, including noise and gain measurements, dE/dx calibration for muons, protons, pions and electrons, drift electron lifetime measurements, and photon detector noise, signal sensitivity and time resolution measurements. The measured values meet or exceed the specifications for the DUNE far detector, in several cases by large margins. ProtoDUNE-SP\u27s successful operation starting in 2018 and its production of large samples of high-quality data demonstrate the effectiveness of the single-phase far detector design