Research Notes : Screening for cyst nematode resistance in soybean breeding

As the soybean cyst nematode (SCN), Heterodera glycines Ichinohe, has become a serious pest of soybeans in the USA, development of resistant culti-vars has received greater attention. This necessitates screening of large numbers of plant progenies to locate SCN-resistant isolates in segregating generations. Ross and Brim (1957) used a double-row method to detect SCN-resistant strains of soybeans

Representaciones sociales de la sexualidad en la infancia y práctica pedagógica de agentes etnoeducadores pertenecientes a la comunidad indígena Wayuu

La investigación titulada: Representaciones sociales de la sexualidad en la infancia y practica pedagógica de agentes etnoeducadores pertenecientes a la comunidad indígena wayuu tiene como objetivo identificar las representaciones sociales sobre sexualidad infantil en un grupo de etnoeducadores y como está influye en su práctica pedagógica. Los marcos conceptuales se encuentran sustentados en el concepto de representación social con autores como: Moscovissi, Denise Jodelet entre otros. El marco metodológico corresponde a una investigación cualitativa. En los resultados se encontró que las representaciones sociales de infancia en la comunidad Wayuu se caracterizan por una lectura tradicional del niño y niña donde debe ser sumiso frente a la autoridad del adulto, no puede criticar o poner en duda el saber y su posición frente al conocimiento es de un receptor pasivo, en el campo de la sexualidad no hay una transmisión de saberes, no se generan espacios para responder preguntar sobre este tema y prevalece el tabú, ya en la pubertad aparecen los rituales para la iniciación sexual más claramente en la niña que en el niño, esto va en contravía con los lineamientos de Ministerio de Educación Nacional sobre la educación sexual en primera infancia y primaria

The efficiency control in the building sector

La efectividad del control en el sector de la construcción, es la búsqueda de una solución a una de las problemáticas para muchas empresas que dedican sus actividades a ejecutar proyectos de obra, donde la documentación de la información se vuelve un conjunto de inconvenientes, debido a que mucha de la documentación son procesos oficinescos que no permiten la correcta ejecución de los proyectos. Esta problemática es la causante de una serie de inconvenientes en la medida que se van ejecutando los proyectos, donde lo común es encontrar personal desmotivado, información escaza, imprecisa, archivos descomunales, pérdida de identidad de la información y derroche del presupuesto. Mediante una encuesta dicotómica, enfocada a personas que dedican sus labores al desarrollo de obras de construcción en el país, con perfiles profesionales de diferentes ramas, se buscara saber su opinión basado en la experiencia que han tenido en sus proyectos, se analizan las respuestas y se llega a una conclusión basada además en la opinión de algunos expertos que han realizado artículos sobre el tema. Además, de realizar el análisis de cada una de las respuestas de los encuestados, se analizan los conceptos de efectividad que ayuden a entender con mayor precisión de lo que se expone en esta investigación.The effectiveness of control in the construction sector, is the search for a solution to one of the problems for many companies that dedicate their activities to implement construction projects, where the documentation of information becomes a set of inconveniences, because many of the documentation are office processes that do not allow the proper implementation of projects. This problem is the cause of a series of inconveniences as the projects are executed; where the typical thing is to find unmotivated personnel, scarce and imprecise information, huge files, loss of identity of the information and waste of the budget. By means of a dichotomous survey, focused on people who dedicate their work to the development of construction works in the country, with professional profiles of different branches, we seek to know their opinion based on the experience they have had in their projects, the answers are analyzed and a conclusion is reached based on the opinion of some experts who have written articles on the subject. In addition to the analysis of each of the answers of the respondents, the concepts of effectiveness are analyzed to help understand more precisely what is exposed in this research.Especializació

Professional Learning Community: Thriving While Facing the Challenges of Faculty Life Together

Researchers have begun to focus attention on the participation of teacher educators in communities of practice (CoPs) and the role that participation plays in improving the quality of teacher education. This case study explores an inter-university CoP (sustained for over 10 years) that includes four faculty members at three universities, who work collaboratively on teacher education program development (e.g., accreditation), research, and service. This exploration is situated in the literature on CoPs, professional capital, and teacher educators’ involvement in CoPs. In this paper the evolution of this inter-university CoP and each CoP member’s personal meaning is shared. Key influences of this involvement in our professional learning (PL) and suggestions for teacher educators’ PL as members of an academic community are offered

Decisiones sobre crianza de los hijos en familias reconstituidas/ child-rearing decisions in stepfamilies/ decisões sobre a criação dos filhos em famílias reconstituídas

Con el propósito de identificar las experiencias de padres y madres en familias reconstituidas sobre la toma de decisiones referentes a la crianza de los hijos, se entrevistó a nueve mujeres y tres hombres con segunda o tercera unión marital. El análisis de las temáticas identificadas indicó que padres y madres perciben mayor autonomía en decisiones relacionadas con la crianza de sus hijos. Sin embargo, los participantes coinciden en que su pareja actual se involucra en la crianza y participa en las decisiones sobre sus hijos. Se discuten los resultados con base en la literatura existente acerca de la toma de decisiones y la crianza en familias reconstituidas

Tau mRNA is present in axonal RNA granules and is associated with elongation factor 1A

The microtubule-associated protein tau is predominantly localized in the axonal compartment over the entire length of the axon in neurons. The mechanisms responsible for the localization of tau in axons at long distance from the cell body are not properly understood. Using fluorescence in situ hybridization, we show that tau mRNA is present in the central and distal parts of the axons of cultured rat cortical neurons. Axonal tau mRNA is associated with granules which are distributed throughout the entire length of the axon, including the growth cone. We also show that tau mRNA-containing axonal particles are associated with elongation factor 1A, a component of the protein translation machinery. The presence of tau mRNA in axons might be at least part of the process by which tau is localized to distal axons

The production of Avena sativa AV25-T (Altoandina) silage as a business model for the higher tropics of Colombia

Dairy production in the Colombian higher tropics (>2,000 m elevation) depends on the climatic conditions. Because of climatic variability, the availability of forage resources for animal feeding is affected throughout the year, generating seasonally marked dairy production. Silage production as a business model is a viable option in financial terms for producer associations. Limitations in access to machinery and technical assistance affect the adoption of this practice among independent smallholder and medium-sized producers. The forage oat Avena sativa AV25-T (Altoandina) has technical characteristics that favor its use as silage rather than the commonly used Porva maize (e.g., precocity, lower costs). Likewise, the production of oat silage generates higher economic benefits than the production of maize silage

Nivel de conocimientos, factores de riesgo y medidas de prevención sobre VIH/sida en estudiantes adolescentes de dos instituciones educativas en la ciudad de lima, 2012

Objetivo: determinar el nivel de conocimientos sobre VIH/sida, factores de riesgo y medidas de prevención en estudiantes adolescentes de dos instituciones educativas de la ciudad de Lima en el año 2012. Materiales y métodos: estudio observacional, analítico y comparativo. Se incluyeron dos grupos: grupo A, de 115 estudiantes (Institución Educativa Particular San José); y grupo B, de 115 estudiantes (Institución Educativa Nacional Antenor Orrego Espinoza). El análisis inferencial utilizó la prueba t de Student para muestras independientes y la prueba de independencia chi-cuadrado. Resultados: el nivel de conocimientos acerca del VIH/sida fue regular en ambas instituciones, con 68,7% en el colegio nacional y 61,7 % en el colegio particular. Los conocimientos sobre factores de riesgo fueron altos en el colegio nacional, con 35,7 %, y regulares en el colegio particular, con 35,7 %. Respecto de conocimientos sobre prevención del VIH, fueron regulares, con 53,9 %, en el colegio nacional, mientas que en el particular fueron altos, con 60 %. Acerca del nivel de conocimientos, factores de riesgo y medidas de prevención sobre VIH/sida, la calificación fue de regular, con 81,7 %, en el colegio nacional, y 71,3 % en el particular. Estas variables no tienen relación (p = 0,118). Conclusiones: el nivel de conocimientos sobre el VIH/sida y el conocimiento sobre factores de riesgo del VIH/sida en el colegio nacional es mayor que en el particular, a excepción del nivel de prevención, que es mayor en el colegio particular.Tesi

Use of zeolites to controlling nonpoint sources of water pollution: a review

[EN] In the Anthropocene, there are changes in the composition of freshwater due to pollution derived from point and non-point sources. In this work, zeolites, which are materials with the most diverse applications, are presented as an alternative to mitigate the changes mentioned above through the control of non-point sources, emphasizing those of urban origin. To do this, the most common strategies to face the problem represented by these sources of pollution, in particular green and blue infrastructure, are reviewed. Likewise, the characteristics and properties of natural, synthetic, and modified zeolites are detailed, as well as examples of their use in non-point water source control systems. The article concludes with some recommendations and perspectives.[ES] En el Antropoceno se constatan cambios en la composición del agua dulce debido a la contaminación derivada de fuentes puntuales y no puntuales. En este trabajo se presenta a las zeolitas, que son materiales con las más diversas aplicaciones, como una alternativa de mitigación de los cambios antes referidos mediante el control de fuentes no puntuales, con énfasis en las escorrentías urbanas. Para ello, se revisan las estrategias más comunes para enfrentar el problema que representan estas fuentes de contaminación, en particular la infraestructura verde y azul. Asimismo, se detallan las características y propiedades de las zeolitas naturales, sintéticas y modificadas, así como ejemplos de su empleo en sistemas de control de escorrentías urbanas. El artículo concluye con algunas recomendaciones y perspectivas.Anna Karen Gallo González agradece la beca otorgada por el Consejo Mexicano de Ciencia y Tecnología (CONACYTMéxico) para realizar sus estudios de posgrado.Gallo-González, AK.; Vázquez-Rodríguez, GA. (2021). Uso de zeolitas para el control de fuentes no puntuales de contaminación del agua: revisión. 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