PROYECTO DE DISEÑO E IMPLEMENTACIÓN DE UNA PLANTA RECICLADORA DE NEUMÁTICOS FUERA DE USO: UN ENFOQUE DE FINANZAS SUSTENTABLES

The project proposes the creation of an end-of-life tire recycling plant with a solid focus on sustainable and triple impact finance. It addresses three fundamental dimensions, economic, social and environmental. The main objective of the project is to design, build and operate a tire recycling plant that is financially profitable and environmentally responsible. This will be achieved through the transformation of used tires into high-quality recycled products using advanced recycling technology, which will include shredding, shredding and processing of used tires to obtain recycled raw materials. These raw materials will be used in the manufacturing of products such as rubber granules, modified asphalt and construction products, allowing for income diversification. The expected sustainable benefits are the reduction of waste, the generation of employment, the contribution to the local economy because it is expected to boost the economic development of the region by promoting the demand for recycled products. The project's financial approach is based on sustainability principles such as profitability, energy efficiency and access to sustainable financing. It will be carried out in phases, from planning and construction of the plant to its operation. A management team committed to sustainability will be established and training and compliance with quality and safety standards will be guaranteed. This presentation includes the development of the main idea and the initial analysis of the technical and economic-financial feasibility since it is in process.El proyecto propone la creación de una planta recicladora de neumáticos fuera de uso con un enfoque sólido en finanzas sustentables y de triple impacto. Aborda tres dimensiones fundamentales, económica, social y ambiental. El objetivo principal del proyecto es diseñar, construir y operar una planta de reciclaje de neumáticos que sea financieramente rentable y ambientalmente responsable. Esto se logrará a través de la transformación de los neumáticos usados en productos reciclados de alta calidad utilizando tecnología avanzada de reciclaje, que incluirá la trituración, desmenuzado y procesamiento de neumáticos usados para obtener materias primas recicladas. Estas materias primas se utilizarán en la fabricación de productos como gránulos de caucho, asfalto modificado y productos para la construcción, lo que permitirá una diversificación de los ingresos. Los beneficios sustentables esperados son la reducción de residuos, la generación de empleo, la contribución a la economía local debido a que se espera impulsar el desarrollo económico de la región al fomentar la demanda de productos reciclados. El enfoque financiero del proyecto se basa en principios de sustentabilidad tales como la rentabilidad, la eficiencia energética y el acceso al financiamiento sostenible. Se llevará a cabo en fases, desde la planificación y construcción de la planta hasta su operación. Se establecerá un equipo de gestión comprometido con la sostenibilidad y se garantizará la capacitación y el cumplimiento de estándares de calidad y seguridad. Esta presentación incluye el desarrollo de la idea principal y el análisis inicial de las viabilidades técnica y económico-financiera ya que se encuentra en proceso

Free-standing hybrid films based on graphene and porous carbon particles for flexible supercapacitors

Free-standing flexible solid-state supercapacitors are attracting attention as a power supply for electronic equipment. Here we report a novel strategy to fabricate free-standing flexible hybrid papers made up of porous carbon particles combined with graphene sheets. The synergetic effect between the carbon particles and the graphene sheets entails two important advantages: (a) binder-free electrodes formed by carbon particles can be built with the assistance of the graphene sheets and (b) the restacking of the graphene sheets is avoided to a great extent due to the fact that the carbon particles act as spacers. These hybrid papers combine important properties for their use in solid-state supercapacitors: (a) large specific surface area, (b) good electrical conductivity, (c) high packing density and (d) excellent flexibility. They exhibit a volumetric electrochemical performance which is clearly superior to electrodes fabricated with carbon particles agglomerated with a binder. In addition, they achieve an excellent areal capacitance (103 mF cm−2) at current densities as high as 1400 mA cm−2 and are able to deliver a large amount of energy (∼12 μW h cm−2) at high power densities (316 mW cm−2). In this work, a robust, flexible and high-performance solid-state supercapacitor has been assembled using such hybrid papers.This research work was supported by the FICYT Regional Project (GRUPIN14- 102), and the Spanish MINECO-FEDER (CTQ2015-63552-R).Peer reviewe

Transient Phenomena Generated in Emptying Operations in Large-Scale Hydraulic Pipelines

[EN] Air pockets generated during emptying operations in pressurized hydraulic systems cause significant pressure drops inside pipes. To avoid these sudden pressure changes, one of the most widely used methods involves the installation of air valves along the pipeline route. These elements allow air exchange between the exterior and the interior of the pipe, which alleviates the pressure drops produced and thus prevents possible breaks or failures in the structure of the installation. This study uses a mathematical model previously validated by the authors in smaller installations to simulate all hydraulic variables involved in emptying processes over time. The purpose of these simulations is the validation of the mathematical model in real large-scale installations, and to do this, the results obtained with the mathematical model are compared with actual measurements made by the partner company. The hydraulic system selected for the study is a pipeline with a nominal diameter of 400 mm and a total length of 1020 m. The results obtained from the mathematical model show great similarity with the experimental measurements, thus validating the model for emptying large pipes.Romero, G.; Fuertes-Miquel, VS.; Coronado-Hernández, ÓE.; Ponz-Carcelén, R.; Biel Sanchis, F. (2020). Transient Phenomena Generated in Emptying Operations in Large-Scale Hydraulic Pipelines. Water. 12(8):1-11. https://doi.org/10.3390/w12082313S111128Laanearu, J., Annus, I., Koppel, T., Bergant, A., Vučković, S., Hou, Q., … van’t Westende, J. M. C. (2012). Emptying of Large-Scale Pipeline by Pressurized Air. Journal of Hydraulic Engineering, 138(12), 1090-1100. doi:10.1061/(asce)hy.1943-7900.0000631Fuertes-Miquel, V. S., Coronado-Hernández, O. E., Mora-Meliá, D., & Iglesias-Rey, P. L. (2019). Hydraulic modeling during filling and emptying processes in pressurized pipelines: a literature review. Urban Water Journal, 16(4), 299-311. doi:10.1080/1573062x.2019.1669188Vasconcelos, J. G., & Wright, S. J. (2008). Rapid Flow Startup in Filled Horizontal Pipelines. Journal of Hydraulic Engineering, 134(7), 984-992. doi:10.1061/(asce)0733-9429(2008)134:7(984)Bashiri-Atrabi, H., & Hosoda, T. (2015). The motion of entrapped air cavities in inclined ducts. Journal of Hydraulic Research, 53(6), 814-819. doi:10.1080/00221686.2015.1060272Zhou, L., Liu, D., Karney, B., & Wang, P. (2013). Phenomenon of White Mist in Pipelines Rapidly Filling with Water with Entrapped Air Pockets. Journal of Hydraulic Engineering, 139(10), 1041-1051. doi:10.1061/(asce)hy.1943-7900.0000765Ramezani, L., Karney, B., & Malekpour, A. (2015). The Challenge of Air Valves: A Selective Critical Literature Review. Journal of Water Resources Planning and Management, 141(10), 04015017. doi:10.1061/(asce)wr.1943-5452.0000530Ramezani, L., Karney, B., & Malekpour, A. (2016). Encouraging Effective Air Management in Water Pipelines: A Critical Review. Journal of Water Resources Planning and Management, 142(12), 04016055. doi:10.1061/(asce)wr.1943-5452.0000695Coronado-Hernández, O., Fuertes-Miquel, V., Besharat, M., & Ramos, H. (2017). Experimental and Numerical Analysis of a Water Emptying Pipeline Using Different Air Valves. Water, 9(2), 98. doi:10.3390/w9020098Liou, C. P., & Hunt, W. A. (1996). Filling of Pipelines with Undulating Elevation Profiles. Journal of Hydraulic Engineering, 122(10), 534-539. doi:10.1061/(asce)0733-9429(1996)122:10(534)Zhou, L., & Liu, D. (2013). Experimental investigation of entrapped air pocket in a partially full water pipe. Journal of Hydraulic Research, 51(4), 469-474. doi:10.1080/00221686.2013.785985Fuertes-Miquel, V. S., López-Jiménez, P. A., Martínez-Solano, F. J., & López-Patiño, G. (2016). Numerical modelling of pipelines with air pockets and air valves. Canadian Journal of Civil Engineering, 43(12), 1052-1061. doi:10.1139/cjce-2016-0209Martins, S. C., Ramos, H. M., & Almeida, A. B. (2015). Conceptual analogy for modelling entrapped air action in hydraulic systems. Journal of Hydraulic Research, 53(5), 678-686. doi:10.1080/00221686.2015.1077353Balacco, G., Apollonio, C., & Piccinni, A. F. (2015). Experimental analysis of air valve behaviour during hydraulic transients. Journal of Applied Water Engineering and Research, 3(1), 3-11. doi:10.1080/23249676.2015.1032374Abreu, J., Cabrera, E., Izquierdo, J., & García-Serra, J. (1999). Flow Modeling in Pressurized Systems Revisited. Journal of Hydraulic Engineering, 125(11), 1154-1169. doi:10.1061/(asce)0733-9429(1999)125:11(1154)De Marchis, M., Freni, G., & Milici, B. (2018). Experimental analysis of pressure-discharge relationship in a private water supply tank. Journal of Hydroinformatics, 20(3), 608-621. doi:10.2166/hydro.2018.135Alexander, J., Lee, P. J., Davidson, M., Duan, H.-F., Li, Z., Murch, R., … Brunone, B. (2019). Experimental Validation of Existing Numerical Models for the Interaction of Fluid Transients With In-Line Air Pockets. Journal of Fluids Engineering, 141(12). doi:10.1115/1.4043776Besharat, M., Tarinejad, R., Aalami, M. T., & Ramos, H. M. (2016). Study of a Compressed Air Vessel for Controlling the Pressure Surge in Water Networks: CFD and Experimental Analysis. Water Resources Management, 30(8), 2687-2702. doi:10.1007/s11269-016-1310-1Covas, D., Stoianov, I., Ramos, H., Graham, N., Maksimović, Č., & Butler, D. (2004). Water hammer in pressurized polyethylene pipes: conceptual model and experimental analysis. Urban Water Journal, 1(2), 177-197. doi:10.1080/1573062041233128997

Analysis of hydraulic transients during pipeline filling processes with air valves in large-scale installations

[EN] During the filling process in pressurized hydraulic systems, sudden pressure changes generated inside the pipes can cause significant damage. To avoid these excessive overpressures, air valves should be installed to allow air exchange between the inside and outside during the filling process. This study presents a mathematical model to analyse the hydraulic transients during filling processes. This model, which has already been validated in small laboratories, is now applied to real large-scale systems that consist of DN400 and DN600 pipelines from Empresa Mixta Metropolitana S.A (EMIMET - Group Global Omnium), which is the company that manages the water supply of the metropolitan area of Valencia (from the Drinking Water Treatment Station to the municipalities). The mathematical model for large pipes is validated by comparing the experimental measurements and the results of model.Romero, G.; Fuertes-Miquel, VS.; Coronado-Hernández, ÓE.; Ponz-Carcelén, R.; Biel-Sanchis, F. (2020). Analysis of hydraulic transients during pipeline filling processes with air valves in large-scale installations. Urban Water Journal. 17(6):568-575. https://doi.org/10.1080/1573062X.2020.1800762S568575176Abreu, J., Cabrera, E., Izquierdo, J., & García-Serra, J. (1999). Flow Modeling in Pressurized Systems Revisited. Journal of Hydraulic Engineering, 125(11), 1154-1169. doi:10.1061/(asce)0733-9429(1999)125:11(1154)Apollonio, C., Balacco, G., Fontana, N., Giugni, M., Marini, G., & Piccinni, A. (2016). Hydraulic Transients Caused by Air Expulsion During Rapid Filling of Undulating Pipelines. Water, 8(1), 25. doi:10.3390/w8010025Balacco, G., Apollonio, C., & Piccinni, A. F. (2015). Experimental analysis of air valve behaviour during hydraulic transients. Journal of Applied Water Engineering and Research, 3(1), 3-11. doi:10.1080/23249676.2015.1032374Besharat, M., Tarinejad, R., Aalami, M. T., & Ramos, H. M. (2016). Study of a Compressed Air Vessel for Controlling the Pressure Surge in Water Networks: CFD and Experimental Analysis. Water Resources Management, 30(8), 2687-2702. doi:10.1007/s11269-016-1310-1Chaudhry, M. H. (2014). Applied Hydraulic Transients. doi:10.1007/978-1-4614-8538-4Coronado-Hernández, Ó. E., Besharat, M., Fuertes-Miquel, V. S., & Ramos, H. M. (2019). Effect of a Commercial Air Valve on the Rapid Filling of a Single Pipeline: a Numerical and Experimental Analysis. Water, 11(9), 1814. doi:10.3390/w11091814Coronado-Hernández, O. E., Fuertes-Miquel, V. S., Besharat, M., & Ramos, H. M. (2018). Subatmospheric pressure in a water draining pipeline with an air pocket. Urban Water Journal, 15(4), 346-352. doi:10.1080/1573062x.2018.1475578Fuertes-Miquel, V. S. 2001. “Hydraulic Transients with Entrapped Air Pockets.” PhD diss., Department of Hydraulic Engineering, Polytechnic University of Valencia, Spain.Fuertes-Miquel, V. S., Coronado-Hernández, O. E., Iglesias-Rey, P. L., & Mora-Meliá, D. (2018). Transient phenomena during the emptying process of a single pipe with water–air interaction. Journal of Hydraulic Research, 57(3), 318-326. doi:10.1080/00221686.2018.1492465Fuertes-Miquel, V. S., Coronado-Hernández, O. E., Mora-Meliá, D., & Iglesias-Rey, P. L. (2019). Hydraulic modeling during filling and emptying processes in pressurized pipelines: a literature review. Urban Water Journal, 16(4), 299-311. doi:10.1080/1573062x.2019.1669188García-Todolí, S., Iglesias-Rey, P., Mora-Meliá, D., Martínez-Solano, F., & Fuertes-Miquel, V. (2018). Computational Determination of Air Valves Capacity Using CFD Techniques. Water, 10(10), 1433. doi:10.3390/w10101433Hou, Q., Tijsseling, A. S., Laanearu, J., Annus, I., Koppel, T., Bergant, A., … van ’t Westende, J. M. C. (2014). Experimental Investigation on Rapid Filling of a Large-Scale Pipeline. Journal of Hydraulic Engineering, 140(11), 04014053. doi:10.1061/(asce)hy.1943-7900.0000914Izquierdo, J., Fuertes, V. S., Cabrera, E., Iglesias, P. L., & Garcia-Serra, J. (1999). Pipeline start-up with entrapped air. Journal of Hydraulic Research, 37(5), 579-590. doi:10.1080/00221689909498518Laanearu, J., Annus, I., Koppel, T., Bergant, A., Vučković, S., Hou, Q., … van’t Westende, J. M. C. (2012). Emptying of Large-Scale Pipeline by Pressurized Air. Journal of Hydraulic Engineering, 138(12), 1090-1100. doi:10.1061/(asce)hy.1943-7900.0000631Leon, A. S., Ghidaoui, M. S., Schmidt, A. R., & Garcia, M. H. (2010). A robust two-equation model for transient-mixed flows. Journal of Hydraulic Research, 48(1), 44-56. doi:10.1080/00221680903565911Liou, C. P., & Hunt, W. A. (1996). Filling of Pipelines with Undulating Elevation Profiles. Journal of Hydraulic Engineering, 122(10), 534-539. doi:10.1061/(asce)0733-9429(1996)122:10(534)Malekpour, A. (2019). Complex interactions of water, air and its controlled removal during pipeline filling operations. Fluid Mechanics research International Journal, 3(1), 4-15. doi:10.15406/fmrij.2019.03.00046Malekpour, A., Karney, B. W., & Nault, J. (2016). Physical Understanding of Sudden Pressurization of Pipe Systems with Entrapped Air: Energy Auditing Approach. Journal of Hydraulic Engineering, 142(2), 04015044. doi:10.1061/(asce)hy.1943-7900.0001067Martins, N. M. C., Delgado, J. N., Ramos, H. M., & Covas, D. I. C. (2017). Maximum transient pressures in a rapidly filling pipeline with entrapped air using a CFD model. Journal of Hydraulic Research, 55(4), 506-519. doi:10.1080/00221686.2016.1275046Martins, S. C., Ramos, H. M., & Almeida, A. B. (2015). Conceptual analogy for modelling entrapped air action in hydraulic systems. Journal of Hydraulic Research, 53(5), 678-686. doi:10.1080/00221686.2015.1077353Ramezani, L., Karney, B., & Malekpour, A. (2015). The Challenge of Air Valves: A Selective Critical Literature Review. Journal of Water Resources Planning and Management, 141(10), 04015017. doi:10.1061/(asce)wr.1943-5452.0000530Ramezani, L., Karney, B., & Malekpour, A. (2016). Encouraging Effective Air Management in Water Pipelines: A Critical Review. Journal of Water Resources Planning and Management, 142(12), 04016055. doi:10.1061/(asce)wr.1943-5452.0000695SaemI, S., Raisee, M., Cervantes, M. J., & Nourbakhsh, A. (2018). Computation of two- and three-dimensional water hammer flows. Journal of Hydraulic Research, 57(3), 386-404. doi:10.1080/00221686.2018.1459892Tijsseling, A. S., Hou, Q., Bozkuş, Z., & Laanearu, J. (2015). Improved One-Dimensional Models for Rapid Emptying and Filling of Pipelines. Journal of Pressure Vessel Technology, 138(3). doi:10.1115/1.4031508Tran, P. D. (2017). Pressure Transients Caused by Air-Valve Closure while Filling Pipelines. Journal of Hydraulic Engineering, 143(2), 04016082. doi:10.1061/(asce)hy.1943-7900.0001245Trindade, B. C., & Vasconcelos, J. G. (2013). Modeling of Water Pipeline Filling Events Accounting for Air Phase Interactions. Journal of Hydraulic Engineering, 139(9), 921-934. doi:10.1061/(asce)hy.1943-7900.0000757Vasconcelos, J. G., & Wright, S. J. (2008). Rapid Flow Startup in Filled Horizontal Pipelines. Journal of Hydraulic Engineering, 134(7), 984-992. doi:10.1061/(asce)0733-9429(2008)134:7(984)Wang, L., Wang, F., Karney, B., & Malekpour, A. (2017). Numerical investigation of rapid filling in bypass pipelines. Journal of Hydraulic Research, 55(5), 647-656. doi:10.1080/00221686.2017.1300193Zhou, F., Hicks, F. E., & Steffler, P. M. (2002). Transient Flow in a Rapidly Filling Horizontal Pipe Containing Trapped Air. Journal of Hydraulic Engineering, 128(6), 625-634. doi:10.1061/(asce)0733-9429(2002)128:6(625)Zhou, L., & Liu, D. (2013). Experimental investigation of entrapped air pocket in a partially full water pipe. Journal of Hydraulic Research, 51(4), 469-474. doi:10.1080/00221686.2013.785985Zhou, L., Liu, D., Karney, B., & Wang, P. (2013). Phenomenon of White Mist in Pipelines Rapidly Filling with Water with Entrapped Air Pockets. Journal of Hydraulic Engineering, 139(10), 1041-1051. doi:10.1061/(asce)hy.1943-7900.0000765Zhou, L., Liu, D., Karney, B., & Zhang, Q. (2011). Influence of Entrapped Air Pockets on Hydraulic Transients in Water Pipelines. Journal of Hydraulic Engineering, 137(12), 1686-1692. doi:10.1061/(asce)hy.1943-7900.0000460Zhou, L., Liu, D., & Ou, C. (2011). Simulation of Flow Transients in a Water Filling Pipe Containing Entrapped Air Pocket with VOF Model. Engineering Applications of Computational Fluid Mechanics, 5(1), 127-140. doi:10.1080/19942060.2011.1101535

Proposal of Two Measures of Complexity Based on Lempel-Ziv for Dynamic Systems: An Application for Manufacturing Systems

The measure of complexity of Lempel-Ziv (LZC) is used for the analysis of time series generated by dynamic systems with the objective of determining its complexity. This work measures LZC of different series coming from periodic functions, probabilistic functions, and chaotic systems. Later, these metrics of complexity are applied to the average of the number of parts in the waiting line in a manufacturing workshop. The results demonstrate the efficiency of the LZC to establish the level of the dynamic behavior of the manufacturing systems, through the time series

A novel molecular analysis approach in colorectal cancer suggests new treatment opportunities

Colorectal cancer (CRC) is a molecular and clinically heterogeneous disease. In 2015, the Colorectal Cancer Subtyping Consortium classified CRC into four consensus molecular subtypes (CMS), but these CMS have had little impact on clinical practice. The purpose of this study is to deepen the molecular characterization of CRC. A novel approach, based on probabilistic graphical models (PGM) and sparse k-means–consensus cluster layer analyses, was applied in order to functionally characterize CRC tumors. First, PGM was used to functionally characterize CRC, and then sparse k-means–consensus cluster was used to explore layers of biological information and establish classifications. To this aim, gene expression and clinical data of 805 CRC samples from three databases were analyzed. Three different layers based on biological features were identified: adhesion, immune, and molecular. The adhesion layer divided patients into high and low adhesion groups, with prognostic value. The immune layer divided patients into immune-high and immunelow groups, according to the expression of immune-related genes. The molecular layer established four molecular groups related to stem cells, metabolism, the Wnt signaling pathway, and extracellular functions. Immune-high patients, with higher expression of immune-related genes and genes involved in the viral mimicry response, may benefit from immunotherapy and viral mimicry-related therapies. Additionally, several possible therapeutic targets have been identified in each molecular group. Therefore, this improved CRC classification could be useful in searching for new therapeutic targets and specific therapeutic strategies in CRC diseas

A humoral diagnostic test outperforms cellular tests in a farm with a latent tuberculosis outbreak caused by a new Mycobacterium tuberculosis complex spoligotype that affected sheep but not goats

Tuberculosis (TB) is a disease caused by members of the M. tuberculosis complex (MTC) that affects numerous species. M. caprae, a member of the complex which is close to M. bovis, is emerging and affects several different hosts that include goats, cattle, sheep, pigs, rabbits, wild boar, red deer, foxes and also humans. A new M. caprae spoligotype (SB2737) was isolated from an outbreak of sheep tuberculosis affecting a mixed sheep (323)-goat (29) farm in 2021. The index case was detected by the La Rioja slaughterhouse veterinary inspection. Tracing back to the farm of origin, both species were submitted to Comparative Intradermal Tuberculin Test (CITT) and M. bovis-specific antibody ELISA tests. A subsample was also examined by IFN-γ release assay (IGRA) and all positives were slaughtered and pathologically and microbiologically investigated. Only 1.2% of sheep and no goat were positive in the CITT, and 11.4% in the IGRA sheep subsample, while up to 36.8% were positive in two consecutive M. bovis-specific antibody ELISA tests. Goats had always tested negative in annual intradermal follow-up since 2013. Upon confirmation of the immunologically positive sheep at slaughter, all the remaining negative animals were killed and 29.2% of sheep were still found infected. This raised the final overall prevalence to 37.5%. Antibody ELISA was the most sensitive (81.4%) in vivo detection method still showing a 85.0% specificity relative to pathological and microbiological tuberculosis status. It was nearly 10 times more sensitive than skin test and had an 86.8% positive predictive value. Notwithstanding a possible singular pathogenesis of the new spoligotype, this outbreak adds up to previous reports suggesting that sheep tuberculosis could be huge reservoir of infection worldwide overlooked by skin test low sensitivity or simply lack of investigation. This makes it urgent to extend the use antibody tests to address the Trojan horse of hidden M. tuberculosis complex infections on bovine TB control programs

Recensiones [Revista de Historia Económica Año III Primavera-Verano 1985 n. 2 pp. 349-381]

José F. de la Peña. Oligarquía y propiedad en Nueva España, 1550-1624 (Por Carlos D. Malamud).-- Aldo de Maddalena. (Por Antonio Miguel Bernal).-- Esteban Rodríguez Ocaña. El cólera de 1834 en Granada. Enfermedad catastrófica y crisis social (Por Octavio Ruiz Manjón-Cabeza).-- Arno J. Mayer. La persistencia del Antiguo Régimen. Europa hasta la Gran Guerra (Por Guillermo Gortázar).-- Isabel Sánchez Casado. La Estadística del Estado en los periodos constitucionales (Por Joaquín del Moral Ruiz).-- José A. Ayala ; Mª del Carmen Bel Adell ; et al. Estudios sobre Historia Económica Contemporánea en la región de Murcia (Por Clara Eugenia Núñez).-- Carmen Martín Gaite. El conde de Guadalhorce. Su época y su labor (Por Juan Velarde Fuertes).-- José Morilla Critz. La crisis económica de 1929 (Por Jordi Palafox).-- Luis Germán Zubero. Aragón en la II República. Estructura económica y comportamiento político (Por Mercedes Cabrera).-- Ricardo Robledo Hernández. La renta de la tierra en Castilla la Vieja y León (1836-1913) (Por Carlos Bárdela)Publicad