Why have poverty and income inequality increased so much? Argentina 1991-2002

This paper analyzes the sources of changes in poverty and income inequality among Argentine households during the 1991-2001 period. We assess the eect of changes in labor market participation, unemployment, education levels, and returns to human capital on income inequality and poverty by using a micro-simulation approach. This procedure allows us to evaluate the impact of each one of those changes on several measures of income inequality and poverty during the nineties. We found that unemployment accounts for a large part of the increase in income inequality and poverty that this country experienced in the last decade. In January 2002, Argentina declared the default on its external debt and devaluated the peso 40% ending the convertibility period. Since then, a growing inflation is aecting the purchasing power of Argentine households for the first time in more than ten years. Using our methodology we estimate the eect of the emerging inflation on poverty among households. Our findings indicate that inflation increases poverty significantly at least in the short run.

A picture worth a thousand words: factors influencing disability accommodations

Because not all disabilities look the same it is difficult to label a person with disabilities just by looking at them. Given that our knowledge, attitudes, and perceptions impact how we interpret our world and our willingness to act, people, including professors, may be biased toward providing accommodations for those with easily recognizable disabilities and biased against those with non-recognizable disabilities, and this may impact the disabled person’s ability to learn. This thesis aims to address whether professors’ disability-related attitudes, perceptions of accommodation reasonableness, and willingness to provide accommodations differ when the disability is recognizable (student is pictured in a wheelchair) compared to unrecognizable (student is pictured in a chair) and whether their level of disability-related knowledge and perceptions of institutional support mediates this relationship. The results suggest that disability recognizability did not significantly affect disability-related attitudes in this sample (n = 35), that disability recognizability did not significantly affect willingness to provide accommodations nor perceptions of accommodations reasonableness. Additionally, the results did not support the research hypothesis that disability-related attitudes would be significantly related to knowledge scores suggesting that knowledge is not a strong predictor of disability related knowledge in this sample of postsecondary faculty members. To truly provide equal opportunity to people with disabilities it is imperative that we collectively work to understand the perceptions of people with disabilities, especially within the institutions of higher education that we all depend on for the promotion of social justice and equality

Diphyllobothrium sp. en Canis familiaris de la región del subtrópico argentino (Puerto Iguazú, Misiones)

This paper reports the first finding of Diphyllobothrium sp. eggs in Canis familiaris(domestic dog) from Puerto Iguazú, a subtropical city of Misiones province, Argentina. In 2013,two positive cases of Diphyllobothrium sp. eggs were detected during an annual parasitological survey of dogs. Dog feces were collected in vials containing 10 % formalin and processed using Telemann?s sedimentation and Sheather?s flotation techniques. The two cases were detected in rural areas of the municipality. Since Misiones is not a part of the endemic area of diphyllobothriasis and given the fact that it is located in the three-border area of Argentina, Brazil and Paraguay, we consider this finding of great importance to public health. We stress the need for updating the current knowledge about the life cycle of these parasites considering the range of intermediate and definitive hosts, their zoonotic potential, and the epidemiological situation in non-endemic areas.This paper reports the first finding of Diphyllobothrium sp. eggs in Canis familiaris (domestic dog) from Puerto Iguazú, a subtropical city of Misiones province, Argentina. In 2013, two positive cases of Diphyllobothrium sp. eggs were detected during an annual parasitological survey of dogs. Dog feces were collected in vials containing 10 % formalin and processed using Telemann's sedimentation and Sheather's flotation techniques. The two cases were detected in rural areas of the municipality. Since Misiones is not a part of the endemic area of diphyllobothriasis and given the fact that it is located in the three-border area of Argentina, Brazil and Paraguay, we consider this finding of great importance to public health. We stress the need for updating the current knowledge about the life cycle of these parasites considering the range of intermediate and definitive hosts, their zoonotic potential, and the epidemiological situation in non-endemic areas.Fil: Rivero, Maria Romina. Ministerio de Salud. Instituto Nacional de Medicina Tropical; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Motta, Carlos E.. Universidad Nacional de Rio Cuarto. Facultad de Agronomia y Veterinaria. Departamento de Patología Animal; ArgentinaFil: Salas, Martin Miguel. Ministerio de Salud. Instituto Nacional de Medicina Tropical; ArgentinaFil: Chiaretta, Alicia. Universidad Nacional de Rio Cuarto. Facultad de Agronomia y Veterinaria. Departamento de Patología Animal; ArgentinaFil: Salomón, Oscar Daniel. Ministerio de Salud. Instituto Nacional de Medicina Tropical; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin

Pymes en red y aprendizaje permanente

The necessity of a permanent adjustment and adaptation to technological and organizational innovation processes by companies and their workers, demands a formative level answers. In that context permanent education became a high priority subject for superior education institutions or companies. The answer to these necessities may be found in the development of virtual communities of learning, that working as social networks promote the development of the intellectual capital of their members through their relations. The paper explores the models of permanent learning for to be used by a of small and medium companies virtual community in Bahía Blanca, Argentina.La necesidad de una permanente adaptación a los procesos de innovación tecnológica y organizacional por parte de las empresas y los trabajadores, exige una respuesta a nivel educativo. La formación permanente se ha vuelto en ese contexto, una prioridad tanto de las instituciones de educación como de las empresas. La respuesta a estas necesidades puede hallarse tanto en el desarrollo de comunidades virtuales de aprendizaje, que funcionando como redes sociales promuevan el desarrollo del capital intelectual de sus miembros a través de sus relaciones con el medio; como también de un nuevo paradigma educativo basado en la facilitación del aprendizaje en un ambiente de red y participativo. El trabajo explora los modelos de fomación continua para su utilización en una comunidad virtual (un concepto que la teoría ha desarrollado con el nombre de VLE: (virtual learning environment) de pequeñas y medianas empresas en Bahía Blanca, Argentina

A perfusion culture system for assessing bone marrow stromal cell differentiation on PLGA scaffolds for bone repair

Biomaterials development for bone repair is currently hindered by the lack of physiologically relevant in vitro testing systems. Here we describe the novel use of a bi-directional perfusion bioreactor to support the long term culture of human bone marrow stromal cells (BMSCs) differentiated on polylactic co-glycolic acid (PLGA). Primary human BMSCs were seeded onto porous PLGA scaffolds and cultured in static vs. perfusion culture conditions for 21 days in osteogenic vs. control media. PLGA scaffolds were osteoconductive, supporting a mature osteogenic phenotype as shown by the upregulation of Runx2 and the early osteocyte marker E11. Perfusion culture enhanced the expression of osteogenic genes Osteocalcin and Osteopontin. Extracellular matrix deposition and mineralisation were spatially regulated within PLGA scaffolds in a donor dependant manner. This, together with the observed upregulation of Collagen type X suggested an environment permissive for the study of differentiation pathways associated with both intramembranous and endochondral ossification routes of bone healing. This culture system offers a platform to assess BMSC behavior on candidate biomaterials under physiologically relevant conditions. Use of this system may improve our understanding of the environmental cues orchestrating BMSC differentiation and enable fine tuning of biomaterial design as we develop tissue-engineered strategies for bone regeneration

Regulated expression of galectin-1 after in vitro productive infection with herpes simplex virus type 1: implications for T cell apoptosis

Apoptosis of cytotoxic T lymphocytes by herpes simplex virus type-1 (HSV-1) has been reported to be a relevant mechanism of viral immune evasion. Galectin-1 (Gal-1), an endogenous lectin involved in T-cell apoptosis, has recently gained considerable attention as a novel mechanism of tumor-immune evasion. Here we investigated whether infection of cells with HSV-1 can modulate the expression of Gal-1. Results show that pro-apoptotic Gal-1, but not Gal-3, is remarkably up-regulated in cell cultures infected with HSV-1. In addition, this protein is secreted to the extracellular milieu, where it contributes to apoptosis of activated T cells in a carbohydrate-dependent manner. Since many viruses have evolved mechanisms to counteract the antiviral response raised by the infected host, our results suggest that HSV-1 may use galectin-1 as a weapon to kill activated T cells and evade specific immune responses.Fil: Gonzalez, Maria Ines. Universidad de Buenos Aires. Facultad de Medicina. Departamento de Microbiología; ArgentinaFil: Rubinstein, Natalia. Universidad de Buenos Aires. Facultad de Medicina. Hospital de Clínicas General San Martín; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; ArgentinaFil: Ilarregui, Juan Martin. Universidad de Buenos Aires. Facultad de Medicina. Hospital de Clínicas General San Martín; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Biología y Medicina Experimental. Fundación de Instituto de Biología y Medicina Experimental. Instituto de Biología y Medicina Experimental; ArgentinaFil: Toscano, Marta Alicia. Universidad de Buenos Aires. Facultad de Medicina. Hospital de Clínicas General San Martín; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Biología y Medicina Experimental. Fundación de Instituto de Biología y Medicina Experimental. Instituto de Biología y Medicina Experimental; ArgentinaFil: Sanjuan, Norberto Aníbal. Universidad de Buenos Aires. Facultad de Medicina. Departamento de Microbiología; ArgentinaFil: Rabinovich, Gabriel Adrián. Universidad de Buenos Aires. Facultad de Medicina. Departamento de Microbiología; Argentina. Universidad de Buenos Aires. Facultad de Medicina. Hospital de Clínicas General San Martín; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas. Instituto de Biología y Medicina Experimental. Fundación de Instituto de Biología y Medicina Experimental. Instituto de Biología y Medicina Experimental; Argentin

Development of arbuscular mycorrhizal fungi in the presence of different patterns of Trifolium repens shoot flavonoids

We tested the effects of the flavonoid 3-methoxi-5,6,7,8-hydroxy-4'hydroxy flavone (NMHTV) isolated from shoots of non arbuscular mycorrhizal (AM) inoculated clover, and of the flavonoids 5,6,7,8-hydroxy-3-methoxy flavone (MH-1); 5,6,7,8-hydroxy-4'- hydroxy flavone (MH-2); and 5,7-hydroxy-3,4'-methoxy flavone (MH-3); isolated from AM clover (Trifolium repens) shoots, on spore germination, hyphal length, hyphal branches and the number of cluster of auxiliary cells or the number of secondary spores (Presymbiotic stage) and on the number of entry points and the percentage of AM colonized root of tomato (Lycopersicum esculentum) by the AM fungi Gigaspora rosea, Giaspora margarita, Glomus mosseae and Glomus intraradices (Symbiotic stage). Non significant effects of the flavonoids isolated from the shoot of mycorrhizal colonized clover on the presymbiotic and symbiotic stages of Gigaspora and Glomus endophytes were found. The flavonoid NMHTV isolated from non AM clover shoot, did not affect the percentage of germination of spores but significantly increased (P < 0.05) the other steps of the presymbiotic stage of Gi. margarita spores when 2 μM concentration was used. The symbiotic stage of Gi. margarita was also significantly increased when 2 μM of the flavonoid NMHTV was applied. This flavonoid had no effect on the presymbiotic development of G. mosseae, G. intraradices and Gi. rosea except when 8 μM concentration was used, which inhibited the hyphal length of Gi. rosea. These results suggest the possible implication of the flavonoid NMHTV in the susceptibility of tomato roots to the AM formation by Gi. margarita. The absence of stimulation of the AM presymbiotic and symbiotic stages in tomato by exogenous application of the newly synthesized flavonoids MH-1, MH-2, and MH-3, in clover shoots after AM colonization, indicated that the autorregulation of the AM symbiosis can be, at least partially, due to the disappearance of flavonoids in AM colonized plants that stimulated the AM symbiosis.Fil: Scervino, Jose Martin. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Biodiversidad y Biología Experimental; ArgentinaFil: Ponce, María Alejandra. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Centro de Investigaciones en Hidratos de Carbono. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Centro de Investigaciones en Hidratos de Carbono; ArgentinaFil: Della Mónica, Ivana Florencia. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Centro de Investigaciones en Hidratos de Carbono. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Centro de Investigaciones en Hidratos de Carbono; ArgentinaFil: Vierheilig, Horst. Universitat Fur Bodenkultur Wien; Austria. Consejo Superior de Investigaciones Científicas. Estación Experimental del Zaidín; EspañaFil: Ocampo, Juan Antonio. Consejo Superior de Investigaciones Científicas. Estación Experimental del Zaidín; EspañaFil: Godeas, Alicia Margarita. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Biodiversidad y Biología Experimental; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentin