Transmisión vertical de precios en la cadena comercial de la zanahoria orgánica y convencional en California

Este trabajo tiene como principal objetivo el análisis de la transmisión vertical de precios en la cadena comercial de la zanahoria orgánica y convencional fresca en el Estado de California, Estados Unidos. Se pretende examinar de forma empírica la evolución de los precios, así como el grado de vinculación entre el mercado de origen y el mercado mayorista. Para la consecución del objetivo mencionado anteriormente, se analizaron los precios mensuales de la zanahoria orgánica y convencional a nivel productor y mercado central en California, durante el período comprendido entre octubre de 2007 a enero de 2016. Durante el análisis, se utilizaron métodos regresivos y de cointegración. Se llegó a la conclusión de que los mercados de zanahoria no se encuentran integrados verticalmente y el margen comercial no se mantuvo constante durante el periodo bajo estudio. Los resultados obtenidos en este trabajo fueron consistentes con otros estudios realizados previamente en el sector agrícola estadounidense.The main objective of this study is the analysis of the vertical transmission of prices in the organic and conventional fresh carrot markets in the state of California, United States. It aims to empirically examine the evolution of prices and the degree of linkage between the origin and the wholesale markets. To achieve the above objective monthly prices of organic and conventional carrots, at the producer and central market level in California, were analyzed during the period of October 2007 to January 2016. Regression and cointegration methods were used in the analysis. It was concluded that both carrot markets were not vertically integrated and that commercial margins did not remain constant during the period under study. The results obtained in this study were consistent with other studies previously conducted in the US agricultural sector.Fil: Quiroga, María Victoria. Universidad Nacional de Mar del Plata. Facultad de Ciencias Económicas y Sociales; Argentina

Habitat heterogeneity and connectivity shape microbial communities in South American petlands

Bacteria play critical roles in peatland ecosystems. However, very little is known of how habitat heterogeneity affects the structure of the bacterial communities in these ecosystems. Here, we used amplicon sequencing of the 16S rRNA and nifH genes to investigate phylogenetic diversity and bacterial community composition in three different sub-Antarctic peat bog aquatic habitats: Sphagnum magellanicum interstitial water, and water from vegetated and non-vegetated pools. Total and nitrogen-fixing bacterial communities from Sphagnum interstitial water differed significantly from vegetated and non-vegetated pool communities (which were colonized by the same bacterial populations), probably as a result of differences in water chemistry and biotic interactions. Total bacterial communities from pools contained typically aquatic taxa, and were more dissimilar in composition and less species rich than those from Sphagnum interstitial waters (which were enriched in taxa typically from soils), probably reflecting the reduced connectivity between the former habitats. These results show that bacterial communities in peatland water habitats are highly diverse and structured by multiple concurrent factors.Fil: Oloo, Felix. University Of Pretoria; SudáfricaFil: Valverde, Angel. University Of Pretoria; SudáfricaFil: Quiroga, María Victoria. Universidad Nacional de San Martin. Instituto Tecnologico de Chascomus. - Consejo Nacional de Investigaciones Cientificas y Tecnicas. Centro Cientifico Tecnologico Conicet - la Plata. Instituto Tecnologico de Chascomus.; ArgentinaFil: Vikram, S.. University Of Pretoria; SudáfricaFil: Cowan, Donald Arthur. University Of Pretoria; SudáfricaFil: Mataloni, Maria Gabriela. Universidad Nacional de San Martín. Instituto de Investigación e Ingeniería Ambiental. Laboratorio de Biodiversidad, Limnología y Conservación; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin

The plankton communities from peat bog pools: structure, temporal variation and environmental factors

This is the first characterization of the structure and temporal variation of the plankton communities comprising the complete food web in five peat bog pools related to environmental factors over two consecutive ice-free periods in Tierra del Fuego (548S). Remarkably, picophytoplankton was composed solely of eukaryotic cells, surpassing the dominance expectations for these acidic water bodies, whereas testaceans were virtually absent, even as tychoplankters. Abundances of the different planktonic communities were slightly higher than those reported for Northern Hemisphere peat bogs and humic lakes. Mixotrophic nutrition prevailed among nano- and microphytoplankters, a strategy also common in humic lakes. The structures in spring of the planktonic communities were similar. In contrast, in late summer there were differences in the abundance and biomass of the different trophic compartments among small, shallow water bodies and large ones. These seem to be dictated by distinct pool size-driven patterns of water temperature variation. A general shift in the control of heterotrophic flagellates abundance in the pools occurred, changing from bottom-up regulation in spring to top-down control in late summer related to temperature-dependant variations in zooplankton abundance and composition. We hypothesize that changes in the trophic interactions affecting the entire food web occur over the open water period in these aquatic ecosystems, and that these are dictated by pool morphometry and related abiotic features.Facultad de Ciencias Naturales y MuseoInstituto de Limnología "Dr. Raul A. Ringuelet

Vocational Guidance Center: joint space in teaching, research and extension

El Centro de Orientación fue fundado en el año 1993 y depende en la actualidad de la Secretaría de Extensión de la Facultad de Psicología. Las distintas coyunturas históricas han ido ampliando sus posibilidades de intervención permitiendo cada vez más la articulación con los tres pilares de la Universidad: docencia – investigación – extensión. En este marco se llevan adelante distintas intervenciones con el objeto de atender a las necesidades de la comunidad. Diferentes programas o proyectos que pueden diferenciarse según su alcance y objetivos y también por el modo de financiamiento. Los distintos modos de intervención buscan dar mejores respuestas a las problemáticas de cada uno, con el mejor aprovechamiento del recurso profesional. Por otra parte, la posibilidad de una práctica profesional, conjuntamente con la posibilidad de formación permanente, y en articulación con las áreas de extensión e investigación, hacen del Centro un espacio en el que transitan muchos jóvenes profesionales psicólogos. Es nuestra intención, presentar aquí la estructura actual del Centro con algunos de sus programas, recogiendo además, algunas experiencias que cualitativamente dan testimonio de su accionar.The orientation Center was founded in 1993 and currently dependent on the Secretariat of Extension at the Faculty of psychology. The different historical junctures have expanded their possibilities for intervention, allowing more and more coordination with the three pillars of the University: teaching - research - extension. In this framework are carried forward various interventions in order to meet the needs of the community. Different programs or projects that can be differentiated according to their scope and objectives and also the mode of financing. The various modes of search for intervention to give better answers to the problems of each, with the best use of the professional resource. On the other hand, the possibility of a professional practice, together with the possibility of lifelong learning, and in articulation with extension and research areas, make it a space in which many young people pass…Facultad de Psicologí

La responsabilidad profesional y la objeción de conciencia: concepciones éticas, jurídicas y diversidad cultural

24 p.El presente escrito estudiará la responsabilidad profesional aplicada en la objeción de conciencia en un plano general, para luego analizarla en el marco del iusnaturalismo y de la prudencia teniendo en cuenta varias situaciones sociales, como lo son: el servicio militar obligatorio, la interrupción voluntaria del embarazo, la eutanasia y la inimputabilidad en derecho penal, explicándolo desde concepciones éticas y jurídicas aplicándose en la diversidad cultural de las profesiones liberales.The present document will study the professional responsibility applied in conscientious objection on a general level, and then analyze it within the framework of natural law and prudence, taking into account several social situations, such as mandatory military service, interruption voluntary pregnancy, euthanasia and imputability in criminal law; explaining it from ethical and legal conceptions applying in the cultural diversity of the liberal professions.1. La responsabilidad profesional y el concepto de prudencia y ley natural: perspectiva jurídica 2. Responsabilidad profesional y objeción de conciencia. 3. Objeción de conciencia, servicio militar obligatorio y diversidad cultural. 4. Objeción de conciencia e interrupción Voluntaria del Embarazo. 5. Objeción de conciencia y eutanasia. 6. Objeción de conciencia e inimputabilidad en derecho penal: diversidad sociocultural. 7. Conclusiones. Referencia

Synthesis and characterization of a new cyclodextrin derivative with improved properties to design oral dosage forms

This work aimed to synthesize a novel β-cyclodextrin derivative, itaconyl-β-cyclodextrin to evaluate whether albendazole inclusion complexes with the new β-cyclodextrin derivative-improved albendazole dissolution efficiency and its anthelminthic activity. The new derivative was thoroughly evaluated and characterized, and an average degree of substitution of 1.4 per cyclodextrin molecule was observed. Albendazole:itaconyl-β-cyclodextrin complexes were prepared by spray drying procedures and investigated using phase solubility diagrams, dissolution efficiency, X-ray diffraction, differential scanning calorimetry, Fourier transform infrared, scanning electronic microscopy, mass spectrometry, and nuclear magnetic resonance spectroscopy. Phase solubility diagrams and mass spectrometry studies showed that the inclusion complex was formed in an equimolar ratio. Stability constant values were 602 M −1 in water, and 149 M −1 in HCl 0.1 N. Nuclear magnetic resonance experiments of the inclusion complex showed correlation signals between the aromatic and propyl protons of albendazole and the itaconyl-β-cyclodextrin inner protons. The studies indicated solid structure changes of albendazole included in itaconyl-β-cyclodextrin. The maximum drug release was reached at 15 min, and the inclusion complex solubility was 88-fold higher than that of the pure drug. The in vitro anthelmintic activity assay showed that the complex was significantly more effective than pure albendazole.Fil: García, Agustina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto de Química Rosario. Universidad Nacional de Rosario. Facultad de Ciencias Bioquímicas y Farmacéuticas. Instituto de Química Rosario; ArgentinaFil: Priotti, Josefina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto de Química Rosario. Universidad Nacional de Rosario. Facultad de Ciencias Bioquímicas y Farmacéuticas. Instituto de Química Rosario; ArgentinaFil: Codina, Ana Victoria. Universidad Nacional de Rosario. Facultad de Ciencias Medicas. Instituto de Genetica Experimental; ArgentinaFil: Vasconi, María Delia. Universidad Nacional de Rosario. Facultad de Ciencias Medicas. Instituto de Genetica Experimental; ArgentinaFil: Quiroga, Ariel Dario. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto de Fisiología Experimental. Universidad Nacional de Rosario. Facultad de Ciencias Bioquímicas y Farmacéuticas. Instituto de Fisiología Experimental; ArgentinaFil: Hinrichsen, Lucila Isabel. Universidad Nacional de Rosario. Facultad de Ciencias Medicas. Instituto de Genetica Experimental; ArgentinaFil: Leonardi, Darío. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto de Química Rosario. Universidad Nacional de Rosario. Facultad de Ciencias Bioquímicas y Farmacéuticas. Instituto de Química Rosario; ArgentinaFil: Lamas, Maria Celina. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto de Química Rosario. Universidad Nacional de Rosario. Facultad de Ciencias Bioquímicas y Farmacéuticas. Instituto de Química Rosario; Argentin

Diet composition of an invasive population of Lithobates catesbeianus (American Bullfrog) from Argentina

The American bullfrog Lithobates catesbeianus has been introduced around the world, with invasive populations reported from almost all South American countries. A population of this species was introduced in the Calingasta department of San Juan province, which is an arid environment in western Argentina. This work provides information on the dietary composition of an invasive population of L. catesbeianus, and compares the degree of dietary overlap between adults and juveniles. Stomach contents of 169 bullfrogs (82 adults and 87 juveniles) were analysed. Adults consumed 40 prey taxa and Hymenoptera (Insecta) was the most numerous prey item (41.8%), followed by Araneae (13.6%) and Aeglidae (13.4%). Juveniles consumed 29 prey taxa and Hymenoptera constituted the highest percentage in prey number (77.2%). The trophic overlap niche index at the same level shows a value of 0.64 overlap in dietary community between adults and juveniles of this bullfrog. Aeglidae was volumetrically the most important trophic item (25.4%), followed by Anura (25.02%). Our results showed that cannibalism in bullfrogs is more common than the consumption of native anurans, coinciding with that reported in other populations of introduced bullfrogs. The high similarity in the diets of both size classes and the association between the size of the predator and prey suggest that the impact caused by bullfrogs throughout their ontogeny is high andprobablyhasanimpactontheirprey.Freshwatercrabsarethemainitemsinthe diet of Lithobates catesbeianus in other introduced populations and are usually the most conspicuous at our study site. The crabs in freshwater ecosystems are part of the lowest trophic level in the food chain. The major threats to the southern region’s freshwater crabs include deforestation, farming and exotic species. Lithobates catesbeianus has a generalist diet and high overlap between adults and juveniles.Fil: Quiroga, Lorena Beatriz. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan; Argentina. Universidad Nacional de San Juan. Facultad de Ciencias Exactas Físicas y Naturales. Departamento de Biología; ArgentinaFil: Moreno Avila, María Daniela. Universidad Nacional de San Juan. Facultad de Ciencias Exactas Físicas y Naturales. Departamento de Biología; ArgentinaFil: Cataldo, Ariel Anibal. Universidad Nacional de San Juan. Facultad de Ciencias Exactas Físicas y Naturales. Departamento de Biología; ArgentinaFil: Aragon y Traverso, Juan Héctor. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan; Argentina. Universidad Nacional de San Juan. Facultad de Ciencias Exactas Físicas y Naturales. Departamento de Biología; ArgentinaFil: Pantano, María Victoria. Universidad Nacional de San Juan. Facultad de Ciencias Exactas Físicas y Naturales. Departamento de Biología; ArgentinaFil: Olivares Toselli, Juan Pablo Segundo. Universidad Nacional de San Juan. Facultad de Ciencias Exactas Físicas y Naturales. Departamento de Biología; ArgentinaFil: Sanabria, Eduardo Alfredo. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - San Juan; Argentina. Universidad Nacional de San Juan. Facultad de Filosofía, Humanidades y Artes. Instituto de Ciencias Básicas; Argentin

Intervenciones en Orientación : Repensado el Modelo Teórico Operativo

Este escrito ha surgido como inquietud del Equipo de Cátedra de Orientación Vocacional al revisar sus prácticas y los conceptos que las sostienen. Hay un mundo que transcurre y un desafío: construir herramientas que lo tornen comprensible.Facultad de Psicologí

The impact of digital technologies on the bond between parents and adolescent children

El presente proyecto se propone indagar sobre el impacto que las nuevas tecnologías de información y comunicación (TIC) y los entornos digitales tienen sobre el vínculo entre padres e hijos adolescentes, en familias de La Plata y Gran La Plata. En el marco de las transformaciones familiares, sociales y culturales de estas últimas décadas, los significados que demarcan los territorios generacionales construyen también novedades en una espacialidad diferente, los territorios digitales, donde la tecnología se ve entretejida de modo ineludible con las tramas constructivas de la subjetividad. Las nuevas formas de familia y las formas actuales de subjetividad adolescente despliegan modos novedosos de vinculación intra e intergeneracionales. Nos proponemos investigar las formas que encuentran los padres y los hijos adolescentes para vincularse entre sí, en un mundo en plena transformación. El corrimiento y la reubicación generacional de los hijos al abandonar la infancia, desafían a un trabajo de simbolizar la diferencia generacional en una operatoria de asesinato simbólico de las figuras parentales y asunción de los emblemas identificatorios de un linaje. Brecha generacional que hoy plantea una brecha alfabeto-generacional, entre nativos e inmigrantes digitales, que pone en jaque los sentidos de continuidad / discontinuidad, transmisión y pertenencia.This project aims to investigate the impact that new information and communication technologies (ICT) and digital environments have on the bond between parents and adolescent children, in families of La Plata and Gran La Plata. In the framework of the family, social and cultural transformations of these last decades, the meanings that demarcate the generational territories also construct novelties in a different spatiality, the digital territories, where technology is inextricably interwoven with the constructive plots of the subjectivity. We intend to investigate the ways that parents and teenage children find in these new plots to link with each other, in a world in full transformation. The shift and generational relocation of the children to abandon childhood and register the novelty of the possibility of reproduction, challenges a work to symbolize the generational difference in an operation of symbolic murder of the parental figures and assumption of the identifying emblems of a lineage. Generational gap that today poses an alphabet-generational gap between natives and digital immigrants puts in check the senses of continuity / discontinuity, transmission and belonging.Facultad de Psicologí

FlowDiv: A new pipeline for analyzing flow cytometric diversity

Background: Flow cytometry (FCM) is one of the most commonly used technologies for analysis of numerous biological systems at the cellular level, from cancer cells to microbial communities. Its high potential and wide applicability led to the development of various analytical protocols, which are often not interchangeable between fields of expertise. Environmental science in particular faces difficulty in adapting to non-specific protocols, mainly because of the highly heterogeneous nature of environmental samples. This variety, although it is intrinsic to environmental studies, makes it difficult to adjust analytical protocols to maintain both mathematical formalism and comprehensible biological interpretations, principally for questions that rely on the evaluation of differences between cytograms, an approach also termed cytometric diversity. Despite the availability of promising bioinformatic tools conceived for or adapted to cytometric diversity, most of them still cannot deal with common technical issues such as the integration of differently acquired datasets, the optimal number of bins, and the effective correlation of bins to previously known cytometric populations. Results: To address these and other questions, we have developed flowDiv, an R language pipeline for analysis of environmental flow cytometry data. Here, we present the rationale for flowDiv and apply the method to a real dataset from 31 freshwater lakes in Patagonia, Argentina, to reveal significant aspects of their cytometric diversities. Conclusions: flowDiv provides a rather intuitive way of proceeding with FCM analysis, as it combines formal mathematical solutions and biological rationales in an intuitive framework specifically designed to explore cytometric diversity.Fil: Wanderley, Bruno M. S.. Universidade Federal do Rio Grande do Norte; BrasilFil: Araújo, Daniel S.. Universidade Federal do Rio Grande do Norte; BrasilFil: Quiroga, María Victoria. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Biotecnológicas. Instituto de Investigaciones Biotecnológicas "Dr. Raúl Alfonsín" (sede Chascomús). Universidad Nacional de San Martín. Instituto de Investigaciones Biotecnológicas. Instituto de Investigaciones Biotecnológicas "Dr. Raúl Alfonsín" (sede Chascomús); ArgentinaFil: Amado, André M.. Universidade Federal do Rio Grande do Norte; Brasil. Universidade Federal de Juiz de Fora; BrasilFil: Neto, Adrião D. D.. Universidade Federal do Rio Grande do Norte; BrasilFil: Sarmento, Hugo. Universidade Federal do São Carlos; BrasilFil: Metz, Sebastián Darío. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Biotecnológicas. Instituto de Investigaciones Biotecnológicas "Dr. Raúl Alfonsín" (sede Chascomús). Universidad Nacional de San Martín. Instituto de Investigaciones Biotecnológicas. Instituto de Investigaciones Biotecnológicas "Dr. Raúl Alfonsín" (sede Chascomús); ArgentinaFil: Unrein, Fernando. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - La Plata. Instituto de Investigaciones Biotecnológicas. Instituto de Investigaciones Biotecnológicas "Dr. Raúl Alfonsín" (sede Chascomús). Universidad Nacional de San Martín. Instituto de Investigaciones Biotecnológicas. Instituto de Investigaciones Biotecnológicas "Dr. Raúl Alfonsín" (sede Chascomús); Argentin