Experiencias Pedagógicas en Interculturalidad Crítica: El caso de dos colegios públicos

This article is the result of our research interest in the concept of Critical Interculturality (CI) along with our professional pedagogical experiences at the public-school level. The experiences took place in two different regions in Colombia, Medellín, Antioquia, and Florencia, Caquetá. These experiences were initially systematized in a PhD seminar concerning Critical Intercultural theories. First of all, we conceptualise CI from a Latin-American perspective associated with patterns of power and hierarchical structures, while bringing to light other ways of being, living, and knowing. Then, we look at the current stage of English Language Teaching (ELT) Colombian scholarship on CI, which is increasingly being studied from the standpoint of theory rather than practice. Finally, we describe two experiences that highlight public school teachers’ practices from a critical intercultural view going beyond CI theory by categorising and proving that it is possible to undertake authentic critical intercultural pedagogical experiences in the EFL/ELT field.Este artículo es el resultado de nuestro interés investigativo en el concepto de Interculturalidad Crítica (IC) junto con nuestras experiencias pedagógicas profesionales de las escuelas del sector público. Las experiencias se desarrollaron en dos regiones diferentes de Colombia, Medellín, Antioquia y Florencia, Caquetá. Estas experiencias fueron inicialmente sistematizadas en un seminario doctoral sobre Interculturalidad Crítica. En primer lugar, conceptualizamos la IC desde una perspectiva latinoamericana asociada a patrones de poder y estructuras jerárquicas, así como otras formas de ser, vivir y saber. Luego, observamos el estado actual de la investigación colombiana sobre la enseñanza del inglés en relación con IC, la cual se estudia más alrededor de discursos teóricos que prácticos. Finalmente, describimos dos experiencias que destacan las prácticas de los docentes de colegios públicos desde una mirada crítica intercultural que va más allá de la teoría sobre IC. Se prueba que es posible emprender experiencias pedagógicas auténticas con un enfoque en IC en el campo de la enseñanza del inglés o idiomas extranjeros

Desarrollo e implementación de un portal web de alimentos nutricionales www.cuidaloquecomes.com

Nuestro país, siendo un estado en vías de desarrollo, a logrado la disminución de casos de enfermedades transmisibles (difteria, sarampión, tétano, etc.); sin embargo los cambios en los hábitos alimenticios poco saludable (alta en grasa, azúcar y sal, baja en frutas, granos y vegetales) y la falta de actividad física han provocado un aumento rápido en las denominadas Enfermedades No Transmisibles (ENTs) en poblaciones cada vez más jóvenes. En el país las ENTs derivadas de los malos hábitos alimenticios son: diabetes mellitus, enfermedades cardiovasculares, hipertensión arterial, obesidad, tumores malignos e insuficiencia renal, estas molestias asolan a nuestro país desde hace dos décadas y actualmente se han convertido en las primeras causas de muerte y discapacidad. Ante esta premisa y aprovechando el impacto del Internet en la sociedad actual surge una fusión de ideas donde nace Cuidaloquecomes, un portal web especializado en alimentación saludable que provee servicio de catering a domicilio y tienda online de productos de primera necesidad, además de otros beneficios como: consultas con especialistas, foros e información actualizada. El objetivo principal del proyecto es, ayudar a personas con enfermedades no transmisibles a llevar un régimen de alimentación sana, contando con una asistencia segura, oportuna, higiénica y saludable para prevenir o tratar adecuadamente sus problemas de salud

Spiroacetals in the Colonization Behaviour of the Coffee Berry Borer: A 'Push-Pull' System

Coffee berries are known to release several volatile organic compounds, among which is the spiroacetal, conophthorin, an attractant for the coffee berry borer Hypothenemus hampei. Elucidating the effects of other spiroacetals released by coffee berries is critical to understanding their chemo-ecological roles in the host discrimination and colonization process of the coffee berry borer, and also for their potential use in the management of this pest. Here, we show that the coffee berry spiroacetals frontalin and 1,6-dioxaspiro [4.5] decane (referred thereafter as brocain), are also used as semiochemicals by the coffee berry borer for host colonization. Bioassays and chemical analyses showed that crowding coffee berry borers from 2 to 6 females per berry, reduced borer fecundity, which appeared to correlate with a decrease in the emission rates of conophthorin and frontalin over time. In contrast, the level of brocain did not vary significantly between borer-uninfested and infested berries. Brocain was attractive at lower doses, but repellent at higher doses while frontalin alone or in a blend was critical for avoidance. Field assays with a commercial attractant comprising a mixture of ethanol and methanol (1:1), combined with frontalin, confirmed the repellent effect of this compound by disrupting capture rates of H. hampei females by 77% in a coffee plantation. Overall, our results suggest that the levels of frontalin and conophthorin released by coffee berries determine the host colonization behaviour of H. hampei, possibly through a 'push-pull' system, whereby frontalin acts as the 'push' (repellent) and conophthorin acting as the 'pull' (attractant). Furthermore, our results reveal the potential use of frontalin as a repellent for management of this coffee pest.DF

A cross-sectional survey of Aedes aegypti immature abundance in urban and rural household containers in central Colombia.

BACKGROUND: Aedes aegypti, the major vector of dengue, breeds in domestic water containers. The development of immature mosquitoes in such containers is influenced by various environmental, ecological and socioeconomic factors. Urban and rural disparities in water storage practices and water source supply may affect mosquito immature abundance and, potentially, dengue risk. We evaluated the effect of water and container characteristics on A. aegypti immature abundance in urban and rural areas. Data were collected in the wet season of 2011 in central Colombia from 36 urban and 35 rural containers, which were either mosquito-positive or negative. Immature mosquitoes were identified to species. Data on water and container characteristics were collected from all containers. RESULTS: A total of 1452 Aedes pupae and larvae were collected of which 81% were A. aegypti and 19% A. fluviatilis. Aedes aegypti immatures were found in both urban and rural sites. However, the mean number of A. aegypti pupae was five times higher in containers in the urban sites compared to those in the rural sites. One of the important factors associated with A. aegypti infestation was frequency of container washing. Monthly-washed or never-washed containers were both about four times more likely to be infested than those washed every week. There were no significant differences between urban and rural sites in frequency of washing containers. Aedes aegypti immature infestation was positively associated with total dissolved solids, but negatively associated with dissolved oxygen. Water temperature, total dissolved solids, ammonia, nitrate, and organic matter were significantly higher in urban than in rural containers, which might explain urban-rural differences in breeding of A. aegypti. However, many of these factors vary substantially between studies and in their degree of association with vector breeding, therefore they may not be reliable indices for vector control interventions. CONCLUSIONS: Although containers in urban areas were more likely to be infested with A. aegypti, rural containers still provide suitable habitats for A. aegypti. Containers that are washed more frequent are less likely to produce A. aegypti. These results highlight the importance of container washing as an effective vector control tool in both urban and rural areas. In addition, alternative designs of the highly productive washbasins should continue to be explored. To control diseases such as dengue, Zika and chikungunya, effective vector breeding site control must be implemented in addition to other interventions

UV-R mitigation strategies in encapsulated embryos of the intertidal gastropod Acanthina monodon: A way to compensate for lack of parental care

Intracapsular embryonic development in the intertidal zone exposes embryos to various stress sources characteristic of this environment, including UV-R. They require defensive mechanisms to mitigate its adverse effects. The presence of total carotenoids (TC), and mycosporine-like amino acids (MAAs) was studied in adults, in encapsulated embryos, and in the egg capsule walls of the intertidal gastropod Acanthina monodon. Oxygen consumption rates (OCR) were determined in encapsulated and excapsulated embryos exposed to photosynthetically active radiation (PAR) and PAR + UV-A + UV-B to understand if the capsule wall is a protective structure for encapsulated embryos. The results showed the presence of TC in adult pedal and gonad tissues, and in all encapsulated stages. MAAs were not detected. The physical structure of the capsule wall retained most wavelengths, being particularly efficient in the UV-B range. Excapsulated embryos exposed to PAR + UV-A + UV-B radiation increased its OCR compared to encapsulated embryos, indicating the protective character of the capsule wall.Fil: Cubillos, Victor M.. Universidad Austral de Chile; ChileFil: Salas Yanquin, Luis P.. Universidad Austral de Chile; ChileFil: Buchner Miranda, Joseline. Universidad Austral de Chile; ChileFil: Ramirez, Felipe. Universidad Austral de Chile; ChileFil: Zabala, Maria Soledad. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Instituto de Biología de Organismos Marinos; ArgentinaFil: Averbuj, Andres. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Instituto de Biología de Organismos Marinos; ArgentinaFil: Marquez, Federico. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Centro Nacional Patagónico. Instituto de Biología de Organismos Marinos; Argentina. Universidad Nacional de la Patagonia. Facultad de Ciencias Naturales. Sede Puerto Madryn; ArgentinaFil: Jaramillo, Hans. Universidad Austral de Chile; ChileFil: Chaparro, Oscar R.. Universidad Austral de Chile; Chil

Characterization of Endothelial Cells Associated with Hematopoietic Niche Formation in Humans Identifies IL-33 As an Anabolic Factor

Bone marrow formation requires an orchestrated interplay between osteogenesis, angiogenesis, and hematopoiesis that is thought to be mediated by endothelial cells. The nature of the endothelial cells and the molecular mechanisms underlying these events remain unclear in humans. Here, we identify a subset of endoglin-expressing endothelial cells enriched in human bone marrow during fetal ontogeny and upon regeneration after chemotherapeutic injury. Comprehensive transcriptional characterization by massive parallel RNA sequencing of these cells reveals a phenotypic and molecular similarity to murine type H endothelium and activation of angiocrine factors implicated in hematopoiesis, osteogenesis, and angiogenesis. Interleukin-33 (IL-33) was significantly overexpressed in these endothelial cells and promoted the expansion of distinct subsets of h

Thermal Tolerance of the Coffee Berry Borer Hypothenemus hampei: Predictions of Climate Change Impact on a Tropical Insect Pest

Coffee is predicted to be severely affected by climate change. We determined the thermal tolerance of the coffee berry borer , Hypothenemus hampei, the most devastating pest of coffee worldwide, and make inferences on the possible effects of climate change using climatic data from Colombia, Kenya, Tanzania, and Ethiopia. For this, the effect of eight temperature regimes (15, 20, 23, 25, 27, 30, 33 and 35°C) on the bionomics of H. hampei was studied. Successful egg to adult development occurred between 20–30°C. Using linear regression and a modified Logan model, the lower and upper thresholds for development were estimated at 14.9 and 32°C, respectively. In Kenya and Colombia, the number of pest generations per year was considerably and positively correlated with the warming tolerance. Analysing 32 years of climatic data from Jimma (Ethiopia) revealed that before 1984 it was too cold for H. hampei to complete even one generation per year, but thereafter, because of rising temperatures in the area, 1–2 generations per year/coffee season could be completed. Calculated data on warming tolerance and thermal safety margins of H. hampei for the three East African locations showed considerably high variability compared to the Colombian site. The model indicates that for every 1°C rise in thermal optimum (Topt.), the maximum intrinsic rate of increase (rmax) will increase by an average of 8.5%. The effects of climate change on the further range of H. hampei distribution and possible adaption strategies are discussed. Abstracts in Spanish and French are provided as supplementary material Abstract S1 and Abstract S2

Control de diarrea y dengue en escuelas primarias rurales de Colombia: protocolo de estudio para un ensayo aleatorio y controlado por conglomerados

Antecedentes.Las enfermedades diarreicas y el dengue son graves problemas de salud pública a nivel global. Cuando el suministro de agua potable es inadecuado, el almacenamiento de agua es crucial. La contaminación fecal del agua almacenada es una fuente común de las enfermedades diarreicas y, al mismo tiempo, el agua almacenada proporciona criaderos para los mosquitos vectores del dengue. Un manejo deficiente del agua doméstica y del saneamiento son, por lo tanto, determinantes potenciales de ambas enfermedades. Poco se sabe de la importancia del agua almacenada para el riesgo combinado de la diarrea y el dengue, sin embargo, una intervención compartida podría ser importante para el desarrollo de esfuerzos en gestión y control integrado. Aun menos conocidos son los efectos de un control integrado de estas enfermedades en los entornos escolares.El objetivo de este estudio fue investigar si las intervenciones contra la diarrea y el dengue reducían significativamente las enfermedades diarreicas y los factores de riesgo entomológico de dengue, en las escuelas primarias rurales de dos municipios de Cundinamarca.Metodología y diseño. Se trata de un ensayo por conglomerados, factorial de 2 x 2, controlado y de asignación aleatoria. Las instituciones elegibles fueron las escuelas rurales de los municipios de La Mesa y Anapoima en el departamento de Cundinamarca. Los estudiantes elegibles fueron los niños de las escuelas de los grados 0 a 5. Las escuelas fueron asignadas aleatoriamente a uno de los cuatro grupos del estudio: intervenciones de diarrea, intervenciones de dengue, las dos intervenciones, diarrea y dengue, y control. Las escuelas fueron estratificadas por municipio y asignadas mediante un acto público al inicio del ensayo. La variable de respuesta primaria para la diarrea fue la tasa de incidencia de diarrea en los niños de las escuelas, y para dengue, la densidad de adultos hembra de Aedes aegypti por escuela. Aproximadamente, 800 estudiantes de 34 escuelas se inscribieron en el ensayo con ocho escuelas en el grupo de diarrea, nueve en el de dengue, ocho en el de diarrea y dengue, y nueve en el grupo control. El ensayo fue financiado por el Consejo de Investigaciones de Noruega, la Universidad El Bosque y la Fundación Lazos de CalandaimaDiscusión. Este es el primer ensayo en que se investiga el efecto de un conjunto de intervenciones integradas para controlar las dos enfermedades, dengue y diarrea. Es también el primer ensayo para estudiar la combinación de intervenciones para el control de dichas enfermedades en entornos escolares.El artículo original fue publicado en inglés como: Diarrhea and dengue control in rural primary schools in Colombia – study protocol for a randomized controlled. Trial. 2012; 13:182. BioMed Central es el editor original del artículo. La información para la traducción de la publicación en español fue actualizada..© 2012 Overgaard HJ, et al.; licensee BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cite

Distribución espacial de Aedes aegypti (Diptera: Culicidae) en el área rural de dos municipios de Cundinamarca, Colombia

Introduction: It is difficult to adapt or create new strategies for dengue control in rural areas due to the dispersion of homes and the lack of knowledge about the presence and behavior of the vector in these areas. Spatial data analysis could help understand time and space dynamics related to the transmission of vector-borne diseases in rural areas and, thus, contribute to the prevention and control of dengue.Objective: To determine the probability of the presence of the dengue vector Aedes aegypti in the rural area of the municipalities of Anapoima and La Mesa, in the central area of Colombia.Materials and methods: The probability of the presence or absence of the vector in the study area was determined by means of the kriging spatial interpolation method.Results: The region with the highest probability of the presence of the vector was located in the central part, close to the urban centers of both municipalities.Conclusion: This study shows the importance of geostatistics for the surveillance of vector-borne diseases and the analysis of time and space dynamics of vector insects and of diseases transmitted by them.Introducción. Es difícil adaptar o formular nuevas estrategias para el control del dengue en las áreas rurales debido a la dispersión de los hogares y a la falta de conocimiento sobre la presencia y el comportamiento del vector en estas áreas. El análisis de los datos espaciales podría ayudar a comprender las dinámicas temporales y espaciales relacionadas con la transmisión de enfermedades transmitidas por vectores en las zonas rurales y, por lo tanto, contribuir a la prevención y el control del dengue.Objetivo. Determinar la probabilidad de la presencia del vector del dengue, Aedes aegypti, en el área rural de los municipios de Anapoima y La Mesa, Cundinamarca, Colombia.Materiales y métodos. Se visitaron 102 viviendas del área rural, se inspeccionaron los criaderos potenciales del mosquito A. aegypti y se capturaron las formas adultas encontradas en su interior. La probabilidad de la presencia o la ausencia del vector en el área de estudio, se estableció mediante el método de interpolación espacial kriging.Resultados. La región con mayor probabilidad para la presencia del vector se encontró en la parte central, cerca de los centros urbanos de los dos municipios.Conclusión. Los análisis de las dinámicas espacio-temporales de los vectores de enfermedades pueden utilizarse en los sistemas para su vigilancia, con el fin de complementar los métodos usados actualmente, optimizar la determinación de las áreas de intervención de control vectorial y ahorrar recursos