Mise en évidence d'une tectonique compressive Éocène-Oligocène dans l'Ouest de la Cordillère orientale de Colombie, d'après la structure en duplex des gisements d'émeraude de Muzo et de Coscuez (Evidence for an Eocene-Oligocene compressive tectonics in the western part of Eastern Cordillera of Colombia, from the duplex structure of the Muzo and Coscuez emerald deposits)

The structures of the emerald deposits of the western part of Eastern Cordillera of Colombia (thrusts, ramps, duplexes, tear faults) have been formed by three deformational events forming a single thrust-tectonics phase, synchronous with the emerald-forming hydrothermalism. As this hydrothermalism is Late Eocene-Early Oligocene in age, it is also the age of the thrust tectonics

Optimization of Inverted All-Inorganic CsPbI3 and CsPbI2Br Perovskite Solar Cells by SCAPS-1D Simulation

Perovskite solar cells (PSCs) have substantially increased their power conversion efficiency(PCE) to more than 25% in recent years. However, the instability of these devices is still astrong obstacle for their commercial applications. Recently, all-inorganic PSCs based on CsPbI3 andCsPbI2Br as the perovskite layer have shown enhanced long-term stability, which makes them potentialcandidates for commercialization. Currently, all-inorganic PSCs with inverted p-i-n configurationhave not yet reached the high efficiency achieved in the normal n-i-p structure. However, theinverted p-i-n architecture has recently drawn attention of researchers because it is more suitable toprepare tandem solar cells. In this work, a theoretical study of inverted p-i-n all-inorganic PSCsbased on CsPbI3 and CsPbI2Br as the perovskite layer was carried out using SCAPS-1D software.The performance of different architectures of PSC was examined and compared by means of numericalsimulations using various inorganic materials as the hole transport layer (HTL) and theelectron transport layer (ETL). The results reveal that CuI and ZnO are the most suitable as HTLand ETL, respectively. In addition, the performance of the devices was significantly improved byoptimizing the hole mobility in CuI as well as the thickness, doping density, and defect density inthe absorber layer. Maximum efficiencies of 26.5% and 20.6% were obtained under optimized conditionsfor the inverted all-inorganic CsPbI3- and CsPbI2Br-based PSCs, respectively. These resultsindicate that further improvements in the performance of such devices are still possible.Fil: Pinzón Rueda, Carlos Alberto. Universidad Nacional de Quilmes; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto Multidisciplinario de Biología Celular. Provincia de Buenos Aires. Gobernación. Comisión de Investigaciones Científicas. Instituto Multidisciplinario de Biología Celular. Universidad Nacional de La Plata. Instituto Multidisciplinario de Biología Celular; ArgentinaFil: Martínez Clemente, Nahuel Facundo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tandil. Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires. Sede Olavarría del Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aire. Universidad Nacional del Centro de la Provincia de Buenos Aires. Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires. Sede Olavarría del Centro de Investigaciones en Física e Ingeniería del Centro de la Provincia de Buenos Aires; Argentina. Universidad Nacional de Quilmes; ArgentinaFil: Casas, Guillermo. Universidad Nacional de Quilmes; ArgentinaFil: Alvira, Fernando Carlos. Universidad Nacional de Quilmes; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Denon, Nicole Alexandra. Universidad Nacional Arturo Jauretche; ArgentinaFil: Brusasco, Carlos Gaston. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; ArgentinaFil: Medina Chanduvi, Hugo Harold. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; ArgentinaFil: Gil Rebaza, Arles Víctor. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Física La Plata. Universidad Nacional de La Plata. Facultad de Ciencias Exactas. Instituto de Física La Plata; ArgentinaFil: Cappelletti, Marcelo Angel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones en Electrónica, Control y Procesamiento de Señales. Universidad Nacional de La Plata. Instituto de Investigaciones en Electrónica, Control y Procesamiento de Señales; Argentin

Modelo de negocio: Aklla Biostore

El presente proyecto de investigación, tiene como objetivo el impulsar el comercio interno de alimentos de origen orgánico, cultivados por pequeños agricultores del país que no cuentan con una llegada a su público objetivo y por ende no pueden impulsar sus ventas. Así mismo, buscamos brindarles a nuestros consumidores, productos de la más alta calidad con el fin de satisfacer sus demandas y cumplir con sus expectativas. Bajo esta primicia, fue que desarrollamos una plataforma web con el fin de comercializar nuestros productos de origen orgánico y además, con el fin de formar parte de la vida de nuestros usuarios, nos basamos en un plan de suscripción en donde nuestros clientes podrán seleccionar cada cuanto tiempo desean recibir uno/s de nuestros packs. Con relación a la sustentación del presente proyecto, iniciamos definiendo y segmentando a nuestro público objetivo, personas de entre 20 a 45 años de edad, de Lima Metropolitana residentes de la zona 7 y que consumen productos orgánicos con frecuencia o que se encuentran incursionando en el mundo de la comida saludable. Seguido a ello, iniciamos con las validaciones respectivas por parte de usuarios y expertos con relación a la problemática que se desea resolver y con ello brindarles la solución idónea. Así mismo, elaboramos experimentos con el fin de validar la viabilidad del presente proyecto y la solución presentada al problema. En una siguiente etapa, se realizó una planificación de concierges con el fin de recabar información relevante que nos permita validar nuestro modelo de negocio. Finalmente, realizamos el plan financiero correspondiente al proyecto, con el fin de conocer si el mismo es rentable y viable en el futuro.The following investigation has as a primary objective to develop and impulse the internal commercialization of organic products cultivated by small Peruvian producers scattered along the Peruvian territory where they don’t have the knowledge of the many tools they can use to reach the final customer. However, we also want to bring top of the line products for our customers, keeping the quality and nutrients that the different products bring. Expectations from our clients are kept in mind while selecting every single product so we can fulfill the client’s needs. Regarding this, we took the whole state of the organic products production in our country to develop a web page so we could sell the previously selected products that come from an organic origin. On the other hand, to become part of our client’s life we decided to develop a service where clients can decide if they want to receive our products on a weekly or monthly basis. Regarding our project presentation and viability, first we had to define and do a segmentation process to identify our target audience; we found that our target audience could be found in between the age range 20 to 45 years old living on Metropolitan Lima, residents of the zone known as “Zona 7” that consume organic products frequently or that are starting to explore the world of healthy and organic type of products. Following our process in creating a service that could fulfill our clients needs we had to validate the viability of our business by gathering information from users and experts that could be potential clients about the problematic we wanted to solve by sharing with them our ways to do so. So far, we had the idea validated by our potential targets but there was a need to investigate further by doing different experiments to confirm the viability of our project and check if our solution to the problem would be accepted by the customer. Following the process, there was a planification for our concierge card with the objective of having planning’s for the upcoming phases of our business model, having costs, strategies, and steps that we should follow that would also validate our whole project. After all this was finished, the final step was to develop a financial plan so we could complete the final step to validate our project, having indicators that would tell us how our project would be viewed in the eyes of an investor and being viable in the future.Trabajo de investigació

Psychological interventions for distress in adults undergoing haematopoietic stem cell transplantation: a systematic review with meta-analysis

Objectives: To investigate the characteristics, methodology, quality, and efficacy of psychological interventions for distress in adult patients undergoing haematopoietic stem cell transplantation (HSCT). Methods: A systematic review of relevant studies was conducted using six databases with supplementary hand searching. Included studies employed an experimental or quasiexperimental design, interventions included at least one psychological component, and outcomes involved psychological distress in affective terms. Data were abstracted and study quality was assessed using Cochrane Foundation criteria amended to include confounder and common factors control. Data were examined and synthesised using a narrative approach and meta-analysis. Results: Eleven articles for nine interventions met the inclusion criteria out of 11741 abstracts. The studies varied in quality, general, intervention, and methodological characteristics while findings were mixed. Interventions tended to show better efficacy when incorporating a major psychological component involving cognitive behavioural or emotional processing methods with substantial interventionist input. However, this was also associated with methodological limitations and threats to internal validity such as poor confounder and common factors control. A meta-analysis yielded a small but significant pooled effect size estimate in favour of interventions with inconsequential heterogeneity. Risk of bias remained a concern. Conclusions: Psychological interventions may provide some benefit in alleviating distress in HSCT but conclusions remain tentative in light of methodological limitations and risk of bias. Further research is needed to evidence the individual contribution of intervention components and mechanism of change together with improving intervention efficiency and methodological quality

Rare and common vertebrates span a wide spectrum of population trends

Conservation biologists often assume that rare (or less abundant) species are more likely to be declining under anthropogenic change. Here, the authors synthesise population trend data for ~2000 animal species to show that population trends cover a wide spectrum of change from losses to gains, which are not related to species rarity

Patterns of Chemical Diversity in the Mediterranean Sponge Spongia lamella

The intra-specific diversity in secondary metabolites can provide crucial information for understanding species ecology and evolution but has received limited attention in marine chemical ecology. The complex nature of diversity is partially responsible for the lack of studies, which often target a narrow number of major compounds. Here, we investigated the intra-specific chemical diversity of the Mediterranean sponge Spongia lamella. The chemical profiles of seven populations spreading over 1200 km in the Western Mediterranean were obtained by a straightforward SPE-HPLC-DAD-ELSD process whereas the identity of compounds was assessed by comparison between HPLC-MS spectra and literature data. Chemical diversity calculated by richness and Shannon indexes differed significantly between sponge populations but not at a larger regional scale. We used factor analysis, analysis of variance, and regression analysis to examine the chemical variability of this sponge at local and regional scales, to establish general patterns of variation in chemical diversity. The abundance of some metabolites varied significantly between sponge populations. Despite these significant differences between populations, we found a clear pattern of increasing chemical dissimilarity with increasing geographic distance. Additional large spatial scale studies on the chemical diversity of marine organisms will validate the universality or exclusivity of this pattern

Mediterranean bioconstructions along the Italian coast

Marine bioconstructions are biodiversity-rich, three-dimensional biogenic structures, regulating key ecological functions of benthic ecosystems worldwide. Tropical coral reefs are outstanding for their beauty, diversity and complexity, but analogous types of bioconstructions are also present in temperate seas. The main bioconstructions in the Mediterranean Sea are represented by coralligenous formations, vermetid reefs, deep-sea cold-water corals, Lithophyllum byssoides trottoirs, coral banks formed by the shallow-water corals Cladocora caespitosa or Astroides calycularis, and sabellariid or serpulid worm reefs. Bioconstructions change the morphological and chemicophysical features of primary substrates and create new habitats for a large variety of organisms, playing pivotal roles in ecosystem functioning. In spite of their importance, Mediterranean bioconstructions have not received the same attention that tropical coral reefs have, and the knowledge of their biology, ecology and distribution is still fragmentary. All existing data about the spatial distribution of Italian bioconstructions have been collected, together with information about their growth patterns, dynamics and connectivity. The degradation of these habitats as a consequence of anthropogenic pressures (pollution, organic enrichment, fishery, coastal development, direct physical disturbance), climate change and the spread of invasive species was also investigated. The study of bioconstructions requires a holistic approach leading to a better understanding of their ecology and the application of more insightful management and conservation measures at basin scale, within ecologically coherent units based on connectivity: the cells of ecosystem functioning