1,720,998 research outputs found
Vínculo entre el sector público y privado en el ámbito de la Ciencia y Tecnología : desarrollo de patentes durante el gobierno kirchnerista
Full text linkFil: Gamba, Martina. CIEPE.Fil: Mocciaro, Anabella. CIEPE
Tabla de investigadores/as y líneas de investigación en torno al litio en Argentina
No full textSistematización de las investigaciones que se realizan en Argentina en torno al litioFil: Gamba, Martina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentin
Anexo 2: ¿Cómo funciona una batería?
No full textLas baterías son dispositivos que nos permiten utilizar un artefacto eléctrico sin necesidad de enchufarlo, justamente porque convierten en energía eléctrica la energía química que almacenan sus átomos. Esto lo vemos claramente cuando encendemos nuestro celular: podemos utilizarlo sin problemas hasta que al cabo de algunas horas la batería está totalmente descargada y resulta necesario conectar el teléfono a la red eléctrica. Durante el proceso de carga, la energía eléctrica de la red se acumula en la batería del móvil en forma de energía química. Luego, al emplearlo estaremos transformando esa energía química en eléctrica y comienza nuevamente el ciclo.Fil: Gamba, Martina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentin
Underground Roots for Ancestral Futures: Exploring Lithium Through an Experimental Alliance between Chemistry and Anthropology
No full textAmid the push for decarbonization and the rise of lithium-ion batteries, global demand for lithium urges an examination of its materiality. Drawing on Barry´s chemical geography, which gathers various concerns related to the study of chemicals in the field, and Bachelard´s meta-chemical proposal, which challenges a substantialist understanding of chemicals, we propose an experimental alliance between a chemist and an anthropologist concerned with different ways of problematizing lithium´s materiality. Guided by a commitment to Latin American territories and embracing a slow science ethos, we seek to foster a sense of responsibility rooted in the material genealogy of chemical substances. Through ethnographic analysis of lithium extraction practices in the Salar de Atacama, Chile, and examination of lithium behaviors in materials chemistry laboratories in Argentina and Europe, we establish a partial connection between lithium chemical labs and underground ancestral lithium brines. Ultimately, we envision futures that acknowledge the ancestral origins of Latin American undergrounds, resisting the univocity of a future-oriented, battery-ion age. In so doing, we endeavor to cultivate a mode of attention concerned with place and deep-time materiality, challenging lineal illusions of progress while embracing the complexities of our planetary present and past.Fil: Bonelli, Cristobal. University of Amsterdam; Países BajosFil: Gamba, Martina. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Centro de Tecnología de Recursos Minerales y Cerámica. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Tecnología de Recursos Minerales y Cerámica; Argentin
Synthesis and characterization of montmorillonite/polyaniline composites and its usage to modify a commercial separator
Full text linkComposites of montmorillonite (MMT) and polyaniline (PANI) were synthetized through a facile and inexpensive method. Two samples with different MMT:PANI ratios were studied and deeply characterized by XRD, TG, zeta potential, FTIR and XPS measurements. On one hand, the sample with ratio MMT:PANI = 87:13 was an intercalated composite, were polyaniline resides between the inorganic layers of the clay at a regular distance. On the other hand, the sample with ratio MMT:PANI = 12:88 was an exfoliated composite, where the inorganic sheets are immersed in an amorphous polymeric matrix. FTIR and XRD results indicated that in both samples, the emeraldine form of polyaniline was obtained. The composites were used to modify -by dr. blade technique- a commercial separator for lithium-ion batteries (LIBs) with the aim of increasing its wettability, ionic conductivity and electrochemical performance. The three-dimensional and multilayered network structure of the MMT/PANI composites led to an enhancement of the electrolyte uptake capacity (from 32% in bare separator to 137% and 168% for MMT/PANI_87/13 and MMT/PANI_12/88 modified separators, respectively, after 3 h). The presence of the coating membrane also led to an increase of the ionic conductivity by one order of magnitude in the modified separators respect to the unmodified one. These coated and non-coated separators were used to assemble full cells with LiNi1.5Mn0.5O4 as cathode active material. The capacity fade after 200 cycles was 20% lower in the cell with MMT/PANI_12/88 membrane in comparison with the bare separator. The enhancement of the electrochemical performance of the cells with the coated separator suggests that is a promising strategy to be used in LIBs.Fil: Para, Maria Laura. Politecnico di Torino; ItaliaFil: Versaci, Daniele. Politecnico di Torino; ItaliaFil: Amici, Julia. Politecnico di Torino; ItaliaFil: Caballero, María Florencia. Politecnico di Torino; ItaliaFil: Cozzarin, Melina Vanessa. YPF - Tecnología; ArgentinaFil: Francia, Carlotta. Politecnico di Torino; ItaliaFil: Bodoardo, Silvia. Politecnico di Torino; ItaliaFil: Gamba, Martina. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Centro de Tecnología de Recursos Minerales y Cerámica. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Tecnología de Recursos Minerales y Cerámica; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentin
Power-to-Gas Hydrogen: Techno-economic Assessment of Processes towards a Multi-purpose Energy Carrier
Full text linkIndustry, science and politics in the Lithium Triangle
Full text linkLas baterías de litio están en el centro de un nuevo paradigma energético al ser un reservorio de electricidad para la generación renovable, darle movilidad a los dispositivos eléctricos y fuerza a los vehículos. Los andes sudamericanos contienen las mayores reservas en salares del mundo, pero aun es incierto si a partir de ellas puede realizarse el tránsito y la agregación de valor que va del salar a la baterías. Abordamos, entonces, la interrelación histórica y actual entre ciencia, política e industria de las baterías en Argentina, Bolivia y Chile, para dar cuenta del estado concreto en el que se encuentran estos países para afrontar el desafío de producir localmente los acumuladores de energía. El trabajo se basa en fuentes primarias, secundarias y en entrevistas en profundidad que hemos realizado en los tres países mencionados durante los años 2017 y 2018.Lithium batteries are in the center of a new energy paradigm. Lithium batteries are a reservoir of electricity for renewable generation, give mobility to the electrical devices and give power to the vehicles. The South American plateau contains the largest lithium resources in the world, but it is still uncertain if the transit to the batteries can be made. We analyze, therefore, the historical and current interrelationship between the science, politics and industry of the batteries in Argentina, Bolivia and Chile, to know if these countries are in the face of the challenge of producing locally energy accumulators. The work is based on primary, secondary sources and in depth interviews that we have made in the three countries mentioned during 2017 and 2018.Fil: Fornillo, Bruno Martín. Universidad de Buenos Aires. Facultad de Ciencias Sociales. Instituto de Estudios de América Latina y el Caribe; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Gamba, Martina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Investigaciones Fisicoquímicas Teóricas y Aplicadas; Argentin
Insight into Thiabendazole interaction with montmorillonite and organically modified montmorillonites
No full textThe interactions of the fungicide, thiabendazole (TBZ) on montmorillonite (Mt) and organoclays synthesizedfrom phosphatidylcholine (DSPC) and octadecyltrimethylammonium bromide (ODTMA) was investigated forwater remediation. The affinity of TBZ on the surface of Mt and organoclays was evaluated by powder X-ray diffraction,X-ray photoelectron spectroscopy and the experimental results were also reinforced by molecularmodelling in order to explore the surfaces arrangements. TBZ was protonated upon interaction with negativechargedMt and therefore this strong electrostatic interactions prevented it´s desorption in water. Repulsive electrostaticinteractions between the cationic surfactant ODTMA and the cationic form of TBZ on the outer surface ofthe ODTMA modified Mt resulted in high desorption values. In the DSPC modified Mt, TBZ was anchored withinthe surfactant chains and a small amount of interlayer water was released from the interlayer space.Fil: Gamba, Martina. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Centro de Tecnología de Recursos Minerales y Cerámica. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Tecnología de Recursos Minerales y Cerámica; Argentina. Charles University; República ChecaFil: Kovář, Petr. Charles University; República ChecaFil: Pospíšil, Miroslav. Charles University; República ChecaFil: Torres Sanchez, Rosa Maria. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Centro de Tecnología de Recursos Minerales y Cerámica. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Centro de Tecnología de Recursos Minerales y Cerámica; Argentin
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
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