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Se caracterizaron 24 accesiones de Phaseolus vulgaris L., de las cuales 21 son de origen andino y tres mesoamericanas. Dentro de los materiales andinos, se incluyeron variedades mejoradas y cultivariedades regionales, procedentes de diversas zonas agroecológicas de Colombia. Para la caracterización, se utilizaron 22 sistemas isoenzimáticos, ocho de los cuales mostraron buena resolución y fueron seleccionados como marcadores bioquímicos del estudio. Seis enzimas revelaron polimorfismos: Esterasa (EST), Malato deshidrogenasa (MOH), Oeshidrogenasa Shikimica (SKOH),Rubisco (RBCS), Isocitrato deshidrogenasa (IOH), y Glutamato deshidrogenasa (GOH). Las enzimas: Transaminasa glutámica oxalacética (GOT) y Endopeptidasa (EP) fueron monomórficas para todas las accesiones estudiadas. El polimorfismo se evidenció a través de 17 loci que codificaron para un mínimo de 34 alelos diferentes. Las enzimas IOH y GOHse reportan por primera vez en el fríjol común. Para establecer las relaciones entre los grupos, se usó la distancia de Jaccard y el algoritmo de agrupación UPGMA. El dendrograma obtenido conjugó dos grupos divididos en cinco subgrupos. Los grupos principales se separaron en primera instancia por el centro de domesticación: el mesoamericano y el andino, como era de esperarse. Los tres testigos mesoamericanos fueron separados del resto en un subgrupo. Las poblaciones andinas colombianas, en las cuales se centró la importancia de este estudio, fueron divididas en cuatro subgrupos que no discriminaron, en forma marcada las variedades mejoradas de las cultivariedades regionales. Los subgrupos se analizaron y discutieron de acuerdo con sus genealogías, orígenes geográficos y lugares de adaptación, más que por sus características morfológicas.Twenty four collections of common bean, 21 from Andean origin and three from Central America were characterized, using biochemical markers. Eight out of 22 isozyme systems showed good resolution. Six enzymes were polymorphic: Esterase (EST), Malate dehydrogenase (MOH), Shikimatedehydrogenase (SKOH), Rubisco (RBCS), Isocitrate dehydrogenase (IOH), and Glutamate dehydrogenase (GOH). Two other two enzymes, Glutamate oxalacetate transminase (GOT) for all accessions and Endopeptidase (EP), were monomorphic. A total of 17 loci were detected with at least 34alleles. The enzymes IOH and GOH are reported the first time for the species. To define the relationships among the accessions, the Jaccard distance and the UPGMA procedures were used. The dendogram displayed two maingroups andfive subgroups. The clusters were associated with the centers of speciess domestication : Mesoamerica and the Andes,as itwasexpected.The relationships among the subgroups were analyzed and discussed accordingto the geographical origin, sites of adaptation and lineage, rather than to their morphological similarities.

Motivation plays a key role in the physical-sports field, in the control of disruptive states and in the mental image that people have of themselves. In view of the above, the present study reflects the objectives of identifying and establishing the relationship between sport motivation, anxiety, physical self-concept and social self-concept, broken down into (a) developing an explanatory model of sport motivation and its relationship with anxiety and social and physical self-concept and (b) contrasting the structural model by means of a multi-group analysis according to sex. To this end, a quantitative, non-experimental (ex post facto), comparative and cross-sectional study was carried out on a sample of 556 students (23.06 ± 6.23). The instruments used were an ad hoc questionnaire, the Spanish version of the Perceived Motivational Climate in Sport Questionnaire (PMCSQ-2), the Beck Anxiety Inventory (BAI) and the Self-Concept Form-5. The results show that the male sex orients sport motivation towards climate, obtaining higher levels of anxiety, however, the female sex, anxiety has a negative impact on the development of social self-concept. In conclusion, it can be affirmed that gender is a fundamental factor in the orientation of sport practice, as well as the development of anxiety and physical and social self-concept., Author(s): E. Melguizo-Ibáñez [sup.1] , F. Zurita-Ortega [sup.1] , J. L. Ubago-Jiménez [sup.1] , C. J. López-Gutiérrez [sup.2] , G. González-Valero [sup.2] Author Affiliations: (1) grid.4489.1, 0000000121678994, Department of Didactics [...]

In a clear commitment for sustainability in the fisheries sector, Regional Administration for Economy and Industry of Xunta de Galicia and EnergyLab Technology Centre signed a cooperation agreement with the goal of performing a demonstration project based on the application of hybrid power supply systems in a fishing vessel. Such a project aims to analyze the feasibility of implementing hybridelectric powertrain systems in the Galician coastal fleet. The final purpose is the implementation of more efficient and environmental friendly propulsion systems within the marine industry. The project scope consists in defining a technical solution for the replacement of diesel propulsion system in a standard fishing vessel (12m. long), representative of the Galician inshore fleet, by a hybrid-electric system powered by three different types of energy sources.

Aims. Recent observations of core-collapse supernovae (SNe) suggest aspherical explosions. Globally, aspherical structures in SN explosions are thought to encode information regarding the underlying explosion mechanism. However, the exact explosion geometries from the inner cores to the outer envelopes are poorly understood. Methods. Here, we present photometric, spectroscopic, and polarimetric observations of the Type IIP SN 2021yja and discuss its explosion geometry in comparison to those of other Type IIP SNe that show large-scale aspherical structures in their hydrogen envelopes (SNe 2012aw, 2013ej and 2017gmr). Results. During the plateau phase, SNe 2012aw and 2021yja exhibit high continuum polarization characterized by two components with perpendicular polarization angles. This behavior can be interpreted as being due to a bipolar explosion, where the SN ejecta is composed of a polar (energetic) component and an equatorial (bulk) component. In such a bipolar explosion, an aspherical axis created by the polar ejecta would dominate at early phases, while the perpendicular axis along the equatorial ejecta would emerge at late phases after the photosphere in the polar ejecta has receded. Our interpretation of the explosions in SNe 2012aw and 2021yja as bipolar is also supported by other observational properties, including the time evolution of the line velocities and the line shapes in the nebular spectra. The polarization of other Type IIP SNe that show large-scale aspherical structures in the hydrogen envelope (SNe 2013ej and 2017gmr) is also consistent with the bipolar-explosion scenario, although this is not conclusive. [ABSTRACT FROM AUTHOR]

SN 2020zbf is a hydrogen-poor superluminous supernova (SLSN) at z = 0.1947 that shows conspicuous C II features at early times, in contrast to the majority of H-poor SLSNe. Its peak magnitude is Mg = −21.2 mag and its rise time (≲26.4 days from first light) places SN 2020zbf among the fastest rising type I SLSNe. We used spectra taken from ultraviolet (UV) to near-infrared wavelengths to identify spectral features. We paid particular attention to the C II lines as they present distinctive characteristics when compared to other events. We also analyzed UV and optical photometric data and modeled the light curves considering three different powering mechanisms: radioactive decay of 56Ni, magnetar spin-down, and circumstellar medium (CSM) interaction. The spectra of SN 2020zbf match the model spectra of a C-rich low-mass magnetar-powered supernova model well. This is consistent with our light curve modeling, which supports a magnetar-powered event with an ejecta mass Mej = 1.5 M⊙. However, we cannot discard the CSM-interaction model as it may also reproduce the observed features. The interaction with H-poor, carbon-oxygen CSM near peak light could explain the presence of C II emission lines. A short plateau in the light curve around 35–45 days after peak, in combination with the presence of an emission line at 6580 Å, can also be interpreted as being due to a late interaction with an extended H-rich CSM. Both the magnetar and CSM-interaction models of SN 2020zbf indicate that the progenitor mass at the time of explosion is between 2 and 5 M⊙. Modeling the spectral energy distribution of the host galaxy reveals a host mass of 108.7M⊙, a star formation rate of 0.24−0.12+0.41M⊙ yr−1, and a metallicity of ∼0.4 Z⊙. [ABSTRACT FROM AUTHOR]

This work concerns Ekeland variational principles for scalar and vector cyclically antimonotone bifunctions on complete metric spaces. The scalar results work for extended bifunctions and they are obtained by a generalized version of the Dancs–Hegedüs–Medvegyev's fixed point theorem. As a result, weaker lower-semicontinuity assumptions have been considered, that generalize the concept of strictly decreasingly lower-semicontinuous real-valued function. The vector results are derived from the previous ones by a scalarization approach and are based on new notions of cyclical antimonotonicity, lower boundedness and strictly decreasingly lower-semicontinuity for vector bifunctions. Several results in the literature are improved since they are stated by weaker assumptions. [ABSTRACT FROM AUTHOR]