2,052 research outputs found

    El Museo Histórico Municipal de Santaella (Córdoba)

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    Recorrido histórico del Museo Histórico Municipal de Santaella hasta su inauguración en 1988 y su trayectoria hasta la instalación definitiva en la Casa de las Columnas en 2016. Se detallan las dos secciones que lo conforman, Arqueología y Etnografía, completadas con Paleontología y Mineralogía, recogiendo la distribución en salas así como los fondos expuestos. Finalmente, se alude al área didáctica que se encuentra en proceso de montaje y a las zonas de almacén y administración

    A Contribution on the Elucidation of the Electrooxidation Mechanism of Gentisaldehyde on a Glassy Carbon Electrode

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    The electrochemical behavior of gentisaldehyde (2,5-dihydroxibenzaldehyde) on a glassy carbon electrode is studied by linear-sweep cyclic voltammetry finding one to three oxidation peaks, depending on both the number of cycles recorded and the pH, and one reduction peak. The oxidation product was the formyl-p-benzoquinone, generated by the oxidation of the biphenolic ring, and not the 2,5-dihydroxybenzoic acid (gentisic acid) that could be formed by oxidation of the aldehyde group. The mechanism proposed at pH pK2 (10.93) the process becomes of the EE type (electrochemical-electrochemical steps), no H+ ions being involved. Radicals species found justify the antioxidant capacity of gentisaldehyde.Funding from Córdoba University through “Ayudas puente para el desarrollo de proyectos de I+D precompetitivos XX Programa Propio 2016” is gratefully acknowledged.Departamento de Ingeniería Química, Química Física y Ciencias de los Materiale

    Estudio hidrotécnico del puente Santa Rosa Del Peñón, en el municipio de Santa Rosa Del Peñón, departamento de León

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    En esta investigación, se realiza el estudio hidrotécnico del puente Santa Rosa del Peñón, ubicado en el municipio de Santa Rosa del Peñón, Departamento de León. Se hace mediante la implementación de herramientas Informáticas que servirán para realizar el análisis, las cuales serán: ArcGIS 9.3, IDRISI SELVA 17.0, HEC-HMS 4.0 y HEC-RAS 4.1.0

    Antioxidant Profile of Pepper (Capsicum annuum L.) Fruits Containing Diverse Levels of Capsaicinoids

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    Capsicum is the genus where a number of species and varieties have pungent features due to the exclusive content of capsaicinoids such as capsaicin and dihydrocapsaicin. In this work, the main enzymatic and non-enzymatic systems in pepper fruits from four varieties with different pungent capacity have been investigated at two ripening stages. Thus, a sweet pepper variety (Melchor) from California-type fruits and three autochthonous Spanish varieties which have different pungency levels were used, including Piquillo, Padrón and Alegría riojana. The capsaicinoids contents were determined in the pericarp and placenta from fruits, showing that these phenyl-propanoids were mainly localized in placenta. The activity profiles of catalase, total and isoenzymatic superoxide dismutase (SOD), the enzymes of the ascorbate–glutathione cycle (AGC) and four NADP-dehydrogenases indicate that some interaction with capsaicinoid metabolism seems to occur. Among the results obtained on enzymatic antioxidants, the role of Fe-SOD and the glutathione reductase from the AGC is highlighted. Additionally, it was found that ascorbate and glutathione contents were higher in those pepper fruits which displayed the greater contents of capsaicinoids. Taken together, all these data indicate that antioxidants may contribute to preserve capsaicinoids metabolism to maintain their functionality in a framework where NADPH is perhaps playing an essential role

    Influence of distance, area, and cultural context in active commuting: Continental and insular children

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    Additionally, this study takes place thanks to funding from the University of Granada, Plan Propio de Investigación 2016, Excellence actions: Units of Excellence; Unit of Excellence on Exercise and Health (UCEES). To PACO project (Pedalea y Anda al Cole), from PROFITH group, University of Granada. To CONICYT PAI-MEC program, from Education Ministry of Chile and to Carmen Sainz Quinn of Granada University for English revision and correction of the document. The funders had no role in study design, data collection and analysis, decision to publish, or preparation of the manuscript.Commuting by walking or cycling is a way to increase physical activity levels. The objective of this article was to determine the modes of commuting to school and the distance and time of the way to school among children from Easter Island and from the mainland (Valparaíso), in Chile. A total of 666 children and adolescents aged 10 to 18 years old (208 from Easter Island and 458 from Valparaíso) participated and completed a valid questionnaire including data about age, gender, usual commuting mode to and from school, distance, and travel time. There are important differences in the mode of commuting between students of Valparaíso and Easter Island. Private transport is more commonly used in Valparaíso than in Easter Island (p<0.001). Furthermore, it was observed that cycling and public transportation are not used as mode of commuting in Valparaíso and Easter Island respectively. Students from Easter Island, who travel more distance and during more time, are more active than students from Valparaíso (going 24.8% and 17.6%; from: 61% and 28.8% respectively). This situation is influenced by the geographic context of the island, the distances from home to school, and the type of commuting, which fosters the level of active commuting. On the other hand, the passive modes of commuting to school are higher in the mainland urban setting of Valparaíso. It is necessary to study the diverse contexts of the Easter Island population, but, for now, the rural setting of Easter Island seems to be associated with a greater level of active commuting to school.This study was supported by the Spanish Ministry of Economy, Industry and Competitiveness and the European Regional Development Fund (DEP2016-75598-R, MINECO/FEDER, UE)

    Método Multi-Híbrido FEM-MoM-PO para el Análisis de Problemas de Dispersión y Radiación

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    A general fully coupled multi-hybrid method in three dimensions (3D) combining the Finite Element Method (FEM), the Method of Moments (MoM), and a high frequency asymptotic technique, Physical Optics (PO), is presented. Complex radiating structures are analyzed with FEM (which easily handles complex geometries, permeable materials, anisotropy, and so on) while small and medium size perfect electric conductor (PEC) objects are rigorously analyzed using MoM; large PEC objects can be efficiently analyzed with PO. Furthermore, different regions of the same object can be modeled with MoM and PO. That provides the possibility, for instance, of taking into account the edge effects of PEC objects without the need of introducing artificial line currents at the edges, as the Physical Theory of Diffraction (PTD) does. Several numerical results are presented showing the validity of the method

    Influence of soil properties on grape and must quality in the Montilla − Moriles protected designation of origin (southern Spain)

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    There is a growing interest among consumers in some world regions in high-quality products including wine. In this work, we examined the unique quality wines obtained in the Montilla − Moriles wine Protected Designation of Origin (PDO) (Córdoba, southern Spain). Specifically, we assessed the influence of soil properties on the production and quality of Pedro Ximénez grapes in the Montilla − Moriles PDO terroir in six vineyards typical of three different production areas, namely: Sierra de Montilla and Moriles Altos (two premium-grade areas), on soils known as “albariza”, characterized by their parent material (mainly marls and limestones), with a high calcium carbonate content and low organic matter content; and one standard-grade area (Ruedos), with soils developed on varied materials including Miocene marls, which are steeply and highly eroded. Representative soil profiles were evaluated and a field experiment to conducted to obtain data on grape production and quality over a period of three years in the six vineyards. Wine quality in the premium-grade areas was strongly influenced by physical characteristics of the vineyards (altitude and age), and also by some soil properties (limestone, poorly crystalline Fe oxides, and available P, Zn and Cu), production-related characteristics (leaf surface area exposed to solar radiation) and oenological variables (tartaric acid content). By contrast, quality in the standard-grade area was more closely related to soil sand and available Mn, and also to scarcely available P and Zn; however, grape bunches were more abundant and grapes larger (100-berry weight) in this area, and the must produced was richer in malic acid. These results suggest that soil properties in each premium-grade area of the Montilla-Moriles PDO (viz., Sierra de Montilla and Moriles Altos) set them apart from each other and distinguish them from the standard-grade area (Ruedos). Such soil properties are associated to consumer-appreciated quality-related parameters

    Constructing a Global and Integral Model of Business Management Using a CBR System

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    Knowledge has become the most strategic resource in the new business environment. A case-based reasoning system, which incorporates a novel clustering and retrieval method, has been developed for identifying critical situations in business processes. The proposed method is based on a Cooperative Maximum Likelihood Hebbian Learning model, which can be used to categorize the necessities for the Acquisition, Transfer and Updating of Knowledge of the different departments of a firm. This technique is used as a tool to develop a part of a Global and Integral Model of business Management, which brings about a global improvement in the firm, adding value, flexibility and competitiveness. From this perspective, the model tries to generalise the hypothesis of organizational survival and competitiveness, so that the organisation that is able to identify, strengthen, and use key knowledge will reach a pole position

    Estructura y variabilidad genética del bisonte americano (Bison bison) en México

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    Controlling for genetic variables to managing conservation populations. Single nucleotide polymorphism (SNP) genetic markers were used to analyze genetic structure and variability in an American bison population in the state of Chihuahua, Mexico. A total of 174 individuals were sampled and analysis done of 42,366 SNP distributed in 29 chromosomes. Estimates were done of expected (He) and observed (Ho) heterozygosity, polymorphic information content (PIC), the fixation index (FST), the Shannon index (SI), linkage disequilibrium (LD), kinship relationships (Rij; %), and effective population size (Ne). A genetic structure analysis was run to infer how many lines or genomes (k) define the studied population. A panel with 2,135 polymorphic SNPs was identified and selected, with an average of 74 SNP per chromosome. In the exclusion process, 84.5 % were monomorphic, 8.5 % had a usable percentage less than 90 %, 6.3 % had a minor allele frequency less than 0.01 and 0.70 % exhibited Hardy-Weinberg disequilibrium (P<0.05). Estimated values were 0.30 for the SI, 0.187 for Ho, 0.182 for He, -0.029 for the FST, and 0.152 for PIC. Of the 15,051 Rij estimates generated, the average value was 7.6 %, and 45.1 % were equal to zero. The Ne was 12.5, indicating a possible increase of 4 % in consanguinity per generation. Three genetic lines were identified (proportions = 0.730, 0.157 and 0.113), and, given the study population’s origin, are probably associated with natural selection or genetic drift. Genetic variability, as well as Rij levels, must be considered in conservation schemes.Los objetivos fueron analizar la estructura y variabilidad genética del bisonte americano con marcadores genéticos de tipo SNP. Se muestrearon 174 bisontes y se analizaron 42,366 SNP distribuidos en los 29 cromosomas. Se estimó la heterocigosis esperada (He) y observada (Ho), contenido de información polimórfica (CIP), índice de fijación (FIS), índice de Shannon (IS), desequilibrio de ligamiento y relación de parentesco (Rij; %), así como el tamaño efectivo de población (Ne). Se realizó un análisis de estructura genética para inferir cuántas líneas o genomas (k) definen la población. Se identificó y seleccionó un panel con 2,135 SNP polimórficos, con un promedio de 74 SNP por cromosoma. En el proceso de exclusión,  84.5 % fueron monomórficos,  8.5 % con porcentaje de usables menor a 90 %, 6.3 % con frecuencia del alelo menor inferior a 0.01 y 0.70 % por desequilibrio Hardy-Weinberg (P<0.05). Las estimaciones de IS, Ho, He, FIS y CIP fueron de 0.30, 0.187, 0.182, -0.029 y 0.152, respectivamente. Se generaron 15,051 estimaciones de Rij, el valor promedio de éstas fue 7.6 %, y el 45.1 % de ellas fue igual a cero. El Ne fue de 12.5, señalando un posible incremento de consanguinidad por generación de 4 %. Se identificaron tres líneas genéticas, con proporciones de 0.730, 0.157 y 0.113; dado el origen de la población, se asocian a selección natural o deriva genética. La variabilidad genética, así como los niveles de la Rij, se deben de considerar en esquemas de conservación
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