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Sample records for alba doctorado curricular

  1. FACTIBILIDAD DE UN PROGRAMA DE DOCTORADO EN LINGÜÍSTICA PARA LA UNIVERSIDAD DEL ZULIA

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    Beatriz Arrieta de Meza

    2014-11-01

    Full Text Available La investigación propuesta se plantea la interrogante acerca de la viabilidad de un programa de Doctorado en Lingüística para universidades venezolanas, detectado como una necesidad entre los egresados de la maestría en lingüística y disciplinas afines, como literatura y comunicación social. Esta propuesta tiene como finalidad diseñar, como estudio piloto,  un programa de Doctorado en Lingüística en La Universidad del Zulia, que amplíe la oferta curricular a los estudios para graduados y proporcione a los egresados los  medios teóricos y prácticos para que puedan generar nuevos conocimientos en esta disciplina. La investigación se enmarca en el tipo de proyecto factible, basada en necesidades detectadas en el campo. La sustentación teórica contempla la propuesta de un doctorado individualizado (Arrieta y Meza, 2004 y algunos de los estudios investigativos llevados a cabo por este equipo de trabajo (Arrieta et al., 2005, (Arrieta et al., 2006. Como antecedentes se cuenta con el programa de Doctorado en Lingüística de la Universidad de Los Andes. También se ha realizado una revisión, a manera de ejemplos, de programas similares pertenecientes a las ofertas curriculares de la Universidad de Concepción en Chile y la Universidad Autónoma de México.  Se espera presentar a la Comisión de Currículo de LUZ un programa que satisfaga la necesidad detectada.

  2. LA TUTORÍA EN PROGRAMAS DE DOCTORADO. TENSIONES TUTORIALES DOCTORADO EN CIENCIAS DE LA EDUCACIÓN RUDECOLOMBIA

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    Mario Gabriel Torres Calixto

    2011-01-01

    Full Text Available El objeto del trabajo es el de analizar las tensiones existentes en el desarrollo de la tutoría del Doctorado en Ciencias de la Educación de RUDECOLOMBIA, dentro del contexto de las tutorías internacionales, con la pregunta ¿Inciden las tensiones de la tutoría en la calidad del trabajo y formación integral del doctorando?. El método se centra desde la historia de la educación que permitió establecer el modelo para analizar el objeto de estudio como es la tutoría en un programa de doctorado. La metodología cualitativa junto con la comparativa, nos proporcionó los procedimientos, clasificación y organización de la información, que permitieron comprender el lugar que ha ocupado la tutoría en la formación de los doctores en RUDECOLOMBIA, desde la revisión de literatura nacional e internacional, las contextualiza dentro del concepto de globalización y plantea alternativas de solución. Las estrategias se centraron en la información de los talleres realizados en Comité Curricular y en las 61 entrevistas realizadas y el archivo de RUDECOLOMBIA. Los resultados permitieron identificar, que si bien existen normas sobre la tutoría en los doctorados, aún se identifican situaciones en las cuales, la decisión a tomar, depende de la autonomía del tutor. Esto genera tensiones, puesto que pueden existir argumentos a favor o en contra de dicha decisión, lo cual incide en la calidad de la formación doctoral. Se socializan algunas recomendaciones para implementar la normatividad y facilitar la toma de decisiones en relación con los dilemas y tensiones que surjan en el proceso de formación del graduado.

  3. Alba County - Rural Tourism Destination?

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    Claudia Olimpia Moisa

    2016-12-01

    Full Text Available The purpose of this paper is to identify the main rural touristic resources available in Alba County and also the preferred tourist destinations, highlighting the role and the importance of the rural tourism and agro-tourism in the economy of Alba County and, not least, identifying the main direction for its development and promotion. In other words, the aim of this paper is to answer the question "Is it or not Alba County a rural tourist destination?"

  4. Pityriasis versicolor alba.

    Science.gov (United States)

    Thoma, W; Krämer, H-J; Mayser, P

    2005-03-01

    Pityriasis versicolor alba is a hypopigmented or depigmented variant of pityriasis versicolor characterized by maculous, partly pityriasiform, scaly depigmented lesions occurring particularly in seborrhoeic areas. Long-persisting hypopigmentation after healing of the pityriasis versicolor was first described by Gudden in 1853. Hypopigmentation and depigmentation were later differentiated as an independent variant of the disease. In 1848, Eichstedt recognized the pathogen-related character of pityriasis versicolor in its hyperpigmented form. Today it is generally accepted that the disease is caused by yeasts of the genus Malassezia, of which nine species are differentiated. It is controversial whether a single species is responsible for the disease. The pathogenesis of depigmentation has not been established. A screening effect by the scale layer as well as toxic effects on pigment synthesis by fungal metabolites have been discussed. With regard to the second mechanism, the newly discovered tryptophan-derived metabolites of M. furfur might be significant. Evidence-based data concerning the therapy of pityriasis versicolor alba do not exist. According to current recommendations, pityriasis versicolor should be rapidly treated with antimycotics, followed by ultraviolet therapy to induce maturation of existent melanosomes and accelerate repigmentation. However, depigmented lesions are difficult to improve by ultraviolet therapy.

  5. LOS DOCTORADOS EN COLOMBIA. Un camino hacia la transformación universitaria

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    Diana Elvira Soto Arango

    2009-01-01

    Full Text Available Los doctorados en Colombia, con el carácter de desarrollar investigación, son de reciente creación de finales del siglo XX. Estos se originan por el cambio en la concepción de la universidad y por la globalización del conocimiento. En Colombia, los doctorados presentan una exuberante legislación en el siglo XXI que está aislada de una realidad educativa que no logra transformarse y concretar políticas y mecanismos que impulsen la formación doctoral. Por su parte, los doctorados en educación, se crean con la peculiaridad organizativa de Redes académicas. En el caso de RUDECOLOMBIA, desde la construcción de la identidad de la Red, se proyecta con objetivos de desarrollo regional educativo y con proyectos de construcción de nación.

  6. Alba Patera Collapse Pits

    Science.gov (United States)

    2004-01-01

    [figure removed for brevity, see original site] We will be looking at collapse pits for the next two weeks. Collapse pits on Mars are formed in several ways. In volcanic areas, channelized lava flows can form roofs which insulate the flowing lava. These features are termed lava tubes on Earth and are common features in basaltic flows. After the lava has drained, parts of the roof of the tube will collapse under its own weight. These collapse pits will only be as deep as the bottom of the original lava tube. Another type of collapse feature associated with volcanic areas arises when very large eruptions completely evacuate the magma chamber beneath the volcano. The weight of the volcano will cause the entire edifice to subside into the void space below it. Structural features including fractures and graben will form during the subsidence. Many times collapse pits will form within the graben. In addition to volcanic collapse pits, Mars has many collapse pits formed when volatiles (such as subsurface ice) are released from the surface layers. As the volatiles leave, the weight of the surrounding rock causes collapse pits to form. This image of the Alba Patera region has both lava tube collapse pits (running generally east/west) and subsidence related collapse within structural grabens. Image information: IR instrument. Latitude 26.9, Longitude 256.5 East (103.5 West). 100 meter/pixel resolution. Note: this THEMIS visual image has not been radiometrically nor geometrically calibrated for this preliminary release. An empirical correction has been performed to remove instrumental effects. A linear shift has been applied in the cross-track and down-track direction to approximate spacecraft and planetary motion. Fully calibrated and geometrically projected images will be released through the Planetary Data System in accordance with Project policies at a later time. NASA's Jet Propulsion Laboratory manages the 2001 Mars Odyssey mission for NASA's Office of Space Science

  7. Desarrollo del programa de Doctorado en Ingeniería en la Universidad de los Andes

    Directory of Open Access Journals (Sweden)

    2009-05-01

    Full Text Available La Memoria, que la Revista de Ingeniería presenta en este número, recuenta el proceso de constitución del programa de doctorado en la Facultad de Ingeniería de la Universidad de los Andes, el cual cumple en 2009 una década de formación de profesionales a nivel doctoral.

  8. La excelencia en los doctorados en educación: Brasil, México y Argentina

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    Luis Sime-Poma

    2013-12-01

    Full Text Available A través de este estudio exploratorio se identifican los programas de Doctorado en Educación considerados de excelencia por los sistemas públicos de acreditación de Brasil, México y Argentina. El estudio describe y compara las líneas de investigación de dichos programas, algunos rasgos de sus docentes investigadores (cantidad, nivel de acreditación como investigadores, cantidad y características de artículos publicados. Para ello, se utiliza el análisis documental de la información oficial brindada por los doctorados y las agencias públicas concernidas en sus respectivas páginas electrónicas. El estudio revela datos significativos sobre los doctorados aunque desiguales en la información aportada en sus páginas electrónicas y muestra cómo estos programas contribuyen a la legitimidad científica de la educación, como área de conocimiento relevante ante la cual es posible organizar comunidades académicas comprometidas con la producción multidisciplinaria de conocimientos y formación de investigadores para dicha área tan reconocida como otras comunidades científicas universitarias.

  9. Curricular Guidelines for Neuroanatomy.

    Science.gov (United States)

    Journal of Dental Education, 1981

    1981-01-01

    Presented are the curricular guidelines for Neuroanatomy developed by the Section on Anatomical Sciences of the American Association of Dental Schools for use by individual educational institutions as curriculum development aids. Included are recommendations for primary educational goals, prerequisites, scope, content, behavioral objectives,…

  10. PROMOTIONAL STRATEGY OF THE ALBA IULIA FORTRESS

    OpenAIRE

    Andreea Muntean; Lucian Marina

    2008-01-01

    The specific character of The Fortress of Alba Iulia results from its value as anelement of historical and cultural patrimony. This value must be kept and brought into prominence,and for this it must be promoted with the help of cultural tourism. This paper presents some issuesregarding the promotional strategy of the Alba Iulia Fortress.

  11. SÍNDROME DE BURNOUT EN ALUMNOS DE LOS DOCTORADOS EN EDUCACIÓN DE DURANGO (MÉXICO

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    Arturo Barraza Macías

    2012-01-01

    Full Text Available Los objetivos de la presente investigación fueron: identificar el perfil descriptivo del síndrome de burnout y establecer la relación que existe entre dicho síndrome y las variables sociodemográficas (género, edad, relación de pareja y número de hijos y situacionales (doctorado que cursa estudiadas. Para el logro de tales objetivos, se realizó una investigación correlacional, transversal y no experimental a través de la aplicación de la Escala Unidimensional de Burnout Estudiantil a los alumnos de los dos doctorados en educación que existen en la ciudad de Durango. En total, se aplicaron 19 cuestionarios y sus resultados permiten afirmar que existe un nivel leve de burnout en los alumnos encuestados y que el doctorado que cursan establece una diferencia significativa en ese nivel.

  12. Concepción y estructuras diferentes del doctorado para formar investigadores.

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    Edmundo Resenos Díaz

    2013-11-01

    Full Text Available El Programa de Doctorado en Ciencias, con especialidad en ciencias administrativas, de la Escuela Superior de Comercio y Administración del Instituto Politécnico Nacional (IPN hasta 1995 era de tipo escolarizado, por asignaturas. El tiempo promedio que consumían los alumnos para concluir el  programa y graduarse era de 11 años. En ese año, el IPN autorizó, de manera oficial, establecer el programa reestructurado, nuevo para nuestro ambiente en esa época. Los objetivos principales del programa fueron: a formar investigadores, b incrementar la eficiencia terminal. Los supuestos, hipótesis y estrategias principales que sustentaban la propuesta fueron:   - El grado de Doctor en Ciencias es el nivel más elevado de educación formal que existe en el sistema de educación nacional y del mundo.   - Los aspirantes que ingresan al programa ya son autodidactas, al menos, saben estudiar por cuenta propia, ostentan un grado de maestría, por lo tanto, pueden adquirir por sí mismos todos los conocimientos, los que les falten o necesiten para culminar su formación.   - Los investigadores se forman haciendo investigación, no asistiendo al aula a escuchar profesores doctos que les trasmiten sus conocimientos y experiencias.   - La práctica hace al investigador, no los ejercicios y prácticas escolares diseñadas por la experiencia de diversos profesores, que simulan en aula escenarios de la realidad a investigar.   - El desarrollo de competencias y aptitudes del Doctor en ciencias.   - La calidad se logra con la interdisciplinaridad e interinstitucionalidad nacional.   Los resultados principales han sido: a graduar investigadores con grado de Doctor en Ciencias en un tiempo promedio de 4 años; b el incremento de eficiencia terminal ha sido del 275%, de julio de 1995 a agosto de 2003 se han graduado 46 doctores. Esta autoevaluación del programa de doctorado proporciona evidencias de la contribución a la generación de un nuevo paradigma de

  13. Antioxidant Effect of Lippia alba (Miller) N. E. Brown

    OpenAIRE

    Chies, Claire; Branco, Cátia; Scola, Gustavo; Agostini, Fabiana; Gower,Adriana; Salvador, Mirian

    2013-01-01

    Lippia alba is a shrub found in all regions of Brazil and other countries in South and Central America. L. alba exhibits variability among its different accessions, showing differences in morphology and in the composition of its essential oil. This study evaluated the phenolic profiles and the antioxidant activities of seven different accessions of L. alba. The seven accessions of L. alba studied exhibited an important phenolic content, and all accessions demonstrated antioxidant activity wit...

  14. SÍNDROME DE BURNOUT EN ALUMNOS DE DOCTORADO EN EDUCACIÓN DE LA CIUDAD DE DURANGO

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    Arturo Barraza Macías

    2013-01-01

    Full Text Available Los objetivos de la presente investigación fueron identificar el perfil descriptivo del síndrome de burnout y establecer la relación que existe entre dicho síndrome y las variables sociodemográficas y situacionales estudiadas. Para el logro de tales propósitos, se realizó una investigación correlacional, transversal y no experimental a través de la aplicación de la Escala Unidimensional de Burnout Estudiantil a los alumnos de los dos doctorados en educación que existen en la ciudad de Durango, México. Los resultados permiten afirmar que existe un nivel leve de burnout en los alumnos encuestados y que el doctorado que cursan establece una diferencia significativa en ese nivel.

  15. Formación en la sociedad del conocimiento, un programa de doctorado con una perspectiva interdisciplinar

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    Francisco José GARCÍA PEÑALVO

    2014-03-01

    Full Text Available En el curso 2013-2014 se ha puesto en marcha en la Universidad de Salamanca un nuevo Programa de Doctorado en Formación en la Sociedad del Conocimiento, vinculado al Instituto de Investigación “Instituto Universitario en Ciencias de la Educación (IUCE” de dicha universidad. Más allá de tratarse de un Programa de Doctorado definido bajo el nuevo Real Decreto 99/2011, lo más destacable es la filosofía con la que se ha definido este programa, completamente interdisciplinar, basada en las líneas de investigación, bastante dispares, de los grupos de investigación que soportan en Programa de Doctorado. Estas líneas y grupos complementan diversos enfoques de la Sociedad del Conocimiento, desde la Ingeniería a la Educación, desde la Medicina a la Robótica, o desde los Medios de Comunicación a la Gestión de la Información, pero siempre compartiendo el aprendizaje y las tecnologías como nexo de unión de las diferentes disciplinas que se ven involucradas.

  16. Relación entre productividad y eficiencia de los programas de doctorado en Psicología

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    Bertha Musi-Lechuga

    2011-01-01

    Full Text Available Algunos estudios han demostrado que la financiación que reciben los programas de doctorado y las universidades influye directamente en su productividad científica. Así, el objetivo de esta investigación es analizar la distribución de los programas de doctorado en Psicología con Mención de Calidad ofrecidos por las universidades españolas en función de la productividad científica de los profesores que participan en ellos y de la financiación que reciben para fomentar la movilidad de profesores y alumnos. Para ello, se calculó, por una parte, la productividad científica en artículos publicados en revistas del Journal Citation Reports y en tesis doctorales dirigidas por los profesores que participan en esos programas. Por otra, la financiación que ha recibido cada programa en función de sus profesores. De esta manera, se distribuyeron los programas en varios grupos según la eficiencia de sus recursos y su productividad científica. Estos resultados son muy relevantes y pueden influir directamente en las decisiones que los futuros alumnos de doctorado, especialmente de Latinoamérica, tomen para elegir qué programas cursar y dónde hacerlo.

  17. Justicia curricular: significados e implicaciones

    OpenAIRE

    Gabriela de la Cruz Flores

    2016-01-01

    En este artículo, analizamos el concepto de justicia curricular y sus diversas implicaciones para el campo de la educación, en general, y para los centros educativos y la práctica pedagógica, en particular. El concepto de justicia curricular cobra peso en las sociedades democráticas contemporáneas porque la vida escolar representa un microsistema de la ciudadanía y los valores que rigen las estructuras socioculturales en las cuales se desenvuelven los individuos; al mismo tiempo, la dinámica ...

  18. Mapping to Curricular and Institutional Goals

    Science.gov (United States)

    Oaks, D'Arcy J.

    2015-01-01

    This chapter will discuss how institutional research professionals might integrate co-curricular learning outcomes into larger measures of institutional effectiveness. By mapping co-curricular learning outcomes to align with curricular and institutional goals, linkages can be made that demonstrate mission-congruent activities and outcomes across…

  19. Justicia curricular: significados e implicaciones

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    Gabriela de la Cruz Flores

    2016-01-01

    Full Text Available En este artículo, analizamos el concepto de justicia curricular y sus diversas implicaciones para el campo de la educación, en general, y para los centros educativos y la práctica pedagógica, en particular. El concepto de justicia curricular cobra peso en las sociedades democráticas contemporáneas porque la vida escolar representa un microsistema de la ciudadanía y los valores que rigen las estructuras socioculturales en las cuales se desenvuelven los individuos; al mismo tiempo, la dinámica escolar realimenta, reconfigura y transforma los espacios externos al ámbito educativo, como la familia, el campo laboral y la comunidad en su conjunto. Justicia curricular evoca no sólo al derecho a aprender, sino a que dichos aprendizajes sean valiosos para la gestión de la autonomía y la participación activa en las esferas públicas y privadas de la sociedad contemporánea. Concluimos que el concepto de justicia curricular orientado a la promoción de aprendizajes significativos y valiosos es una vía potente para reestructurar los centros educativos y la vida al interior de las aulas.

  20. Curricular Models for Culturally Disadvantaged

    Science.gov (United States)

    King, Clement T.

    1976-01-01

    Two psychological theories which seem to have had a great impact on compensatory education programs are Skinnerian reinforcement theory and the cognitive developmental theory derived in part from Jean Piaget. The Englemann-Becker program is a typical example of the Programmed Curricular kind of program; the Florida Project, an Open Framework; and…

  1. Curricular Design, a shared responsibility.

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    María Clara Tovar

    2011-11-01

    Full Text Available Normal 0 21 false false false ES-CO X-NONE X-NONE Introducción: El diseño o rediseño curricular de un programa académico incluye las fases de fundamentación, definición de ejes problemáticos y estructuración. El estudio pretende fomentar la reflexión sobre la práctica y la investigación en el campo curricular y fortalecer las políticas institucionales relacionadas con el diseño curricular de los programas académicos, en procura de mejorar la pertinencia y la calidad del currículo.Objetivo: Describir las prácticas del diseño curricular en los programas académicos de pregrado de la Facultad de Salud de la Universidad del Valle.Metodología: Se realizó un estudio cualitativo con el enfoque de fenomenología hermenéutica, el cual permite describir e interpretar lo que vivencian los actores sobre el diseño curricular en un momento histórico determinado. Se realizaron entrevistas a profundidad a grupos focales conformados por los miembros de los comités de currículo de los ocho programas académicos de pregrado de la Facultad de Salud de la Universidad del Valle.Resultados: Cada programa académico en su diseño curricular tiene en cuenta aspectos como el marco normativo, el contexto internacional, nacional y local; algunos programas tienen nexos con las diferentes asociaciones de los programas académicos, lo cual contribuye a enriquecer el currículo. De otra parte, la participación docente en el diseño curricular es permanente, mientras que la participación de egresados y empleadores es fluctuante.Conclusiones: La formación disciplinar es fundamental para el desempeño del docente universitario, sin embargo, para hacer más integral su labor se hace necesario que comprenda y se involucre más activa y conscientemente en la fase del diseño curricular. En los procesos formativos de los docentes se debe fortalecer lo relacionado con el diseño curricular de los programas académicos, en procura de mejorar, con su

  2. SÍNDROME DE BURNOUT EN ALUMNOS DE DOCTORADO EN EDUCACIÓN DE LA CIUDAD DE DURANGO

    OpenAIRE

    2013-01-01

    Los objetivos de la presente investigación fueron identificar el perfil descriptivo del síndrome de burnout y establecer la relación que existe entre dicho síndrome y las variables sociodemográficas y situacionales estudiadas. Para el logro de tales propósitos, se realizó una investigación correlacional, transversal y no experimental a través de la aplicación de la Escala Unidimensional de Burnout Estudiantil a los alumnos de los dos doctorados en educación que existen en la ciudad de Durango...

  3. SÍNDROME DE BURNOUT EN ALUMNOS DE LOS DOCTORADOS EN EDUCACIÓN DE DURANGO (MÉXICO)

    OpenAIRE

    2012-01-01

    Los objetivos de la presente investigación fueron: identificar el perfil descriptivo del síndrome de burnout y establecer la relación que existe entre dicho síndrome y las variables sociodemográficas (género, edad, relación de pareja y número de hijos) y situacionales (doctorado que cursa) estudiadas. Para el logro de tales objetivos, se realizó una investigación correlacional, transversal y no experimental a través de la aplicación de la Escala Unidimensional de Burnout Estudiantil a los alu...

  4. Historia de las Prácticas Curriculares en los procesos de formación de licenciados: 1973-1998

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    Reynaldo Mora Mora

    2015-10-01

    Full Text Available Se presenta un resumen del trabajo final de tesis de doctorado en ciencias de la educación, titulada “Historia de las Prácticas Curriculares en los procesos de formación de licenciados en ciencias sociales: 1973-1998”. En esta investigación se da a conocer cómo se formaron licenciados y qué tipo de prácticas curriculares fueron puestas en escena por parte de las instituciones educativas del estudio. AbstractAn abstract of the of the final work of the doctoral thesis on Sciences of Education is presented under the title “A History of the Curricular Practices in the Process of Formation of Education Graduates in Social Sciences: 1973-1998”. In this research it is announced how the Education Graduates were educated and what sort of curricular practices were staged by the educational institutions studied.

  5. ECLALBATIN, A TRITERPENE SAPONIN FROM ECLIPTA ALBA

    Institute of Scientific and Technical Information of China (English)

    R. K. UPADHYAY; M. B. PANDEY; R. N. JHA; V. B. PANDEY

    2001-01-01

    From the whole plant of Eclipta alba, a new triterpene saponin, named eclalbatin, together with α-amyrin, ursolic acid and oleanolic acid were isolated. The structure of eclalbatin has been established as 3-0-β-D-glucopyranosyl-3-β-hydroxy-olean-12-en-28-oic acid, 28-0-β-D-arabino-pyranoside (1) on the basis of chemical and spectral data.

  6. Enfoque curricular centrado en la persona

    OpenAIRE

    Luis Manuel Jiménez Castro

    2008-01-01

    A curricular approach structures, visualizes, and organizes the educational process. However in spite of their importance, the Costa Rican educational system does not identify some clear characteristics of a curricular approach, by means of which the educator can locate the student type they should form. This article pretends to systematize and to contribute by means of a bibliographical review of a curricular approach centered in the person, an alternative that allows the formation of people...

  7. Información Institucional : Doctorado en Historia de la Facultad de Humanidades y Ciencias de la Educación

    OpenAIRE

    Patricia Graciela Flier

    1998-01-01

    Si bien el Doctorado en Historia de nuestra Facultad tiene una larga tradición y reconocimiento por haber sido ámbito académico del que egresaron profesionales de reconocido prestigio desde los años treinta, fue a partir del mes de abril de 1996 en que se decidió fortalecer su funcionamiento. Con este propósito y contando con el apoyo otorgado por el FOMEC para el desarrollo del Proyecto de Formación Docente y Doctorado en Historia se inicia una nueva etapa. En este marco se reafirman los obj...

  8. The Alba ray tracing code: ART

    Science.gov (United States)

    Nicolas, Josep; Barla, Alessandro; Juanhuix, Jordi

    2013-09-01

    The Alba ray tracing code (ART) is a suite of Matlab functions and tools for the ray tracing simulation of x-ray beamlines. The code is structured in different layers, which allow its usage as part of optimization routines as well as an easy control from a graphical user interface. Additional tools for slope error handling and for grating efficiency calculations are also included. Generic characteristics of ART include the accumulation of rays to improve statistics without memory limitations, and still providing normalized values of flux and resolution in physically meaningful units.

  9. Doctorado chileno en bibliotecología: Necesidad nacional Chilean Ph. D. in Library Science: a National Necessity

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    Ariel Rementería Piñones

    2008-04-01

    Full Text Available Se hace una reflexión sobre la implementación en Chile de un programa de doctorado en bibliotecología, se analiza la ley LOCE y su relación con los posgrados, y con el proceso de acreditación, se hace un breve análisis de los programas de magísteres ofrecidos en Chile en bibliotecología y su relación con la situación bibliotecaria del país. Se exponen los motivos que justificarían el desarrollo de un programa de doctorado de bibliotecología en Chile con base en los precarios resultados de los indicadores relacionados con la cantidad de recursos humanos altamente calificados en el área. Se concluye que existe la necesidad de aumentar la masa crítica de investigadores en la bibliotecología chilena a través de un programa doctoral.The implementation in Chile of a Ph. D. in Library Science is reflected upon and the Organic Constitutional Teaching Law (LOCE analysed in relation to postgraduate education. The master programs offered in Chile in Library Science are briefly outlined. The reasons which justify the development of the doctoral program are discussed in the light of the poor results suggested by indicators on the number of highly qualified human resources in the area. The need to increase the critical number of researchers in Chilean Library Science through a masters degree, is concluded.

  10. Antioxidant Effect of Lippia alba (Miller N. E. Brown

    Directory of Open Access Journals (Sweden)

    Claire E. Chies

    2013-09-01

    Full Text Available Lippia alba is a shrub found in all regions of Brazil and other countries in South and Central America. L. alba exhibits variability among its different accessions, showing differences in morphology and in the composition of its essential oil. This study evaluated the phenolic profiles and the antioxidant activities of seven different accessions of L. alba. The seven accessions of L. alba studied exhibited an important phenolic content, and all accessions demonstrated antioxidant activity with different efficacies. The main flavonoids in all accessions were apigenin, luteolin, naringin and rutin. The Santa Vitória do Palmar accession exhibited higher naringin and total phenolic content. This extract was able to reduce hydrogen peroxide-induced oxidative damage in tissue homogenates of cerebellum, cerebral cortex, hippocampus and liver of Wistar rats.

  11. Antioxidant Effect of Lippia alba (Miller) N. E. Brown.

    Science.gov (United States)

    Chies, Claire E; Branco, Cátia S; Scola, Gustavo; Agostini, Fabiana; Gower, Adriana E; Salvador, Mirian

    2013-09-26

    Lippia alba is a shrub found in all regions of Brazil and other countries in South and Central America. L. alba exhibits variability among its different accessions, showing differences in morphology and in the composition of its essential oil. This study evaluated the phenolic profiles and the antioxidant activities of seven different accessions of L. alba. The seven accessions of L. alba studied exhibited an important phenolic content, and all accessions demonstrated antioxidant activity with different efficacies. The main flavonoids in all accessions were apigenin, luteolin, naringin and rutin. The Santa Vitória do Palmar accession exhibited higher naringin and total phenolic content. This extract was able to reduce hydrogen peroxide-induced oxidative damage in tissue homogenates of cerebellum, cerebral cortex, hippocampus and liver of Wistar rats.

  12. Antihepatotoxic activity of eclipta alba, tephrosia purpurea and boerhaavia diffusa.

    Science.gov (United States)

    Murthy, V N; Reddy, B P; Venkateshwarlu, V; Kokate, C K

    1992-01-01

    Alcoholic and chloroform extracts of E. albaT. purpurea and B. diffusa were screened for antihepatotoxic activity. The extracts were given after the liver was damaged with CCl4. Liver function was assessed based on liver to boy weight ratio, pentobarbitone sleep time, serum levels of transaminase (SGPT, SGOT), alkaline phosphatase (SALP) and bilirubin. Alcoholic extract of E. alba was found to have good antihepatotoxic activity.

  13. Programas de doctorado en ingeniería para la innovación: una propuesta de política pública para el sector industrial en colombia

    OpenAIRE

    Jorge Enrique Celis Giraldo; Mauricio Duque Escobar

    2013-01-01

    Aumentar el número de graduados de programas de doctorado en la industria colombiana, se ha definido como uno de los mecanismos para fortalecer las capacidades deinnovación de dicho sector. Un estudio realizado en Colombia demostró que la mayoría de los estudiantes de doctorado en ingeniería prefiere la academia como destino laboral.Dicho estudio encontró también que los programas de doctorado de corte industrial influyen en las expectativas de los estudiantes para que opten por la industria....

  14. Propagação vegetativa de Lippia alba Vegetative propagation of Lippia alba

    Directory of Open Access Journals (Sweden)

    Luiz Antônio Biasi

    2003-06-01

    Full Text Available A Lippia alba é uma planta medicinal nativa da América do Sul muito utilizada pela sua propriedade calmante. No presente trabalho estudou-se a propagação vegetativa dessa espécie, visando a obtenção de uma forma eficiente de formação de mudas. Foram testados diferentes tipos de estaca (medianas com 4 folhas, medianas com 2 folhas, medianas sem folhas e apicais, tamanhos de estacas lenhosas (5, 10, 15 e 20cm e substratos (casca de arroz carbonizada, vermiculita, solo e Plantmax®. Todos os tipos de estaca apresentaram altas taxas de enraizamento, comprovando que a L. alba é uma espécie de fácil enraizamento. As estacas medianas com quatro folhas foram as que apresentaram o maior desenvolvimento radicial, ao contrário das estacas sem folhas. As estacas com duas folhas também apresentaram bom crescimento radicial, facilidade de manuseio e o dobro do rendimento no preparo das estacas em relação as com quatro folhas. Os substratos não afetaram a porcentagem de enraizamento, mas a maior massa de raízes foi obtida com casca de arroz carbonizada. O aumento do tamanho da estaca lenhosa proporcionou um aumento linear em todas as variáveis analisadas. Conclui-se que a produção de mudas de L. alba pode ser realizada com estacas semilenhosas com um par de folhas ou com estacas lenhosas com 20cm de comprimento em substratos porosos e sem necessidade de irrigação por nebulização.Lippia alba is a medicinal plant native of the South America it is used because of its sedative property. In this work the cutting propagation of this species was studied aiming at obtain an efficient protocol of plant production. Different types of cuttings were tested (middle with 4 leaves, middle with two leaves, middle without leaves and apical, length of hardwood cuttings (5, 10, 15 and 20cm and substrates (carbonized rice hulls, vermiculite, soil and Plantmax®. All types of cuttings showed high rates of rooting, confirming that L. alba is an easy to root

  15. Doctorados con Mención de Excelencia en Psicología: evidencia en tesis doctorales y artículos en la Web of Science

    OpenAIRE

    José Alonso Olivas-Ávila; Bertha Musi-Lechuga

    2012-01-01

    Los programas de doctorado en España han experimentado una serie de transformaciones a través de las distintas convocatorias de Mención de Calidad y más recientemente con la Mención de Excelencia en función de lograr una satisfactoria adaptación al EEES. El objetivo de este estudio es realizar un análisis de la productividad científica de los cinco programas de doctorado en Psicología que les ha sido otorgada la Mención de Excelencia según la resolución de 6 de octubre de 2011 de la Secretarí...

  16. Calidad en la Educación superior española: los estudios de doctorado en Educación Matemática

    OpenAIRE

    Torralbo Rodríguez, Manuel; Maz Machado, Alexander; Vallejo Ruiz,Mónica; Fernández Cano, Antonio

    2003-01-01

    Este artículo ofrece una discusión extensa sobre la calidad de la investigación española en Educación Matemática, en base a los estudios de doctorado, utilizando una serie de criterios. En un breve balance, se consideran las realizaciones generales y las limitaciones detectadas, tratando de mejorar este campo de investigación.

  17. Doctorados con Mención de Excelencia en Psicología: evidencia en tesis doctorales y artículos en la Web of Science

    Directory of Open Access Journals (Sweden)

    José Alonso Olivas-Ávila

    2012-01-01

    Full Text Available Los programas de doctorado en España han experimentado una serie de transformaciones a través de las distintas convocatorias de Mención de Calidad y más recientemente con la Mención de Excelencia en función de lograr una satisfactoria adaptación al EEES. El objetivo de este estudio es realizar un análisis de la productividad científica de los cinco programas de doctorado en Psicología que les ha sido otorgada la Mención de Excelencia según la resolución de 6 de octubre de 2011 de la Secretaría General de Universidades, a través de las tesis doctorales dirigidas por los profesores de cada programa y recuperadas desde TESEO y también por medio de los artículos publicados en revistas incluidas en el Web of Science de cada uno de ellos. Los resultados del análisis de la productividad en artículos se obtuvieron tras analizar 15.781 artículos de los cuales 1.318 pertenecen al total de profesores de los 5 programas de doctorado. Se encontró que el rango de artículos por profesor es de 15,34 como máximo y 6 como mínimo, y en cuanto a las tesis el rango es entre 2,34 y 0,11. Se discuten las implicaciones de los resultados en cuanto a evaluación de los programas de doctorado.

  18. Programas de doctorado en Ingeniería para la innovación: una propuesta de política pública para el sector industrial en Colombia

    Directory of Open Access Journals (Sweden)

    Jorge Enrique Celis Giraldo

    2013-12-01

    Full Text Available Aumentar el número de graduados de programas de doctorado en la industria colombiana, se ha definido como uno de los mecanismos para fortalecer las capacidades deinnovación de dicho sector. Un estudio realizado en Colombia demostró que la mayoría de los estudiantes de doctorado en ingeniería prefiere la academia como destino laboral.Dicho estudio encontró también que los programas de doctorado de corte industrial influyen en las expectativas de los estudiantes para que opten por la industria. Este artículo describe los aspectos que se consideran relevantes para transformar los doctorados de corte académico, en otros, que promuevan la innovación.

  19. Modelo curricular de la Universidad del Zulia

    Directory of Open Access Journals (Sweden)

    Neimar Fonseca Cascioli

    2012-01-01

    Full Text Available Un modelo curricular constituye un conjunto de elementos comunes dentro de una corriente de pensamiento en el campo de la educación. El objetivo de la investigación fue explorar los modelos curriculares asumidos por la Universidad del Zulia desde 1946 a 2008. La investigación es de tipo exploratoria, y la metodología utilizada consistió en la revisión de documentos oficiales, bibliografía especializada en la temática y entrevistas a miembros de la Comisión Central de Currículo de la Universidad del Zulia de diferentes períodos. Los resultados evidencian que la universidad en referencia ha asumido dos modelos curriculares: Profesional-Técnico y el Integral. Se concluye que los currículos de las diversas carreras se han caracterizado por ser altamente profesionalizantes, enciclopédicos y conductistas

  20. Enfoque curricular centrado en la persona

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    Luis Manuel Jiménez Castro

    2008-01-01

    Full Text Available Un enfoque curricular estructura, visua-liza y organiza el proceso educativo. Sin embargo, a pesar de su importancia, el sistema educativo costa-rricense no identifica unas características prácticas claras de un enfoque curricular, por medio del cual el educador pueda ubicar el tipo de estudiante que debe formar.Se desea sistematizar y aportar por medio de una revisión bibliográfica, del enfoque curricular cen-trado en la persona, una alternativa que favorezca la formación de las personas de manera integral, que promueva la crítica, la búsqueda de soluciones a problemas comunales y en general al avance de la sociedad a través del bien común.

  1. Chemical Constituents and Biological Activities of Artemisia herba-alba

    Directory of Open Access Journals (Sweden)

    Abou El-Hamd H. Mohamed

    2010-01-01

    Full Text Available Artemisia, one of the larger genera in the family Asteraceae and the largest genus in the tribe Anthemideae, comprises from 200 to more than 500 taxa at the specific or subspecific level. Many Artemisia species have a high economic value in several fields, as food plants and as antihelminthic and antimalaria in medicine. Artemisia herba-alba was known for its therapeutic and medicinal properties, it was used in both traditional and modern medicine. Several papers have been published on the chemical composition of specimens of A. herba-alba. The aim of this work is to review all available scientific literature published on A. herba-alba. The focus will be on the chemical constitutions which have been identified from this species, in addition to all of the reported biological activites of this species have been included as well as the pharmacology and toxicology

  2. El alba-tcp mirado con buenos ojos

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    Christopher David Absell

    2012-01-01

    Full Text Available El surgimiento de la Alianza Bolivariana para los Pueblos de Nuestra América-Tratado de Comercio de los Pueblos (alba-tcp representa una novedad de importancia regional e internacional; sin embargo hasta la fecha el trabajo académico sobre la organización ha sido escaso y se ha caracterizado por tener un enfoque metodológico descriptivo carente de investigación empírica comprensiva. En este artículo sostengo que este enfoque metodológico ha imbuido la literatura de un sesgo positivo a favor del alba-tcp y sus proyectos de desarrollo. El objetivo de este artículo es examinar esta literatura para determinar una agenda de investigación para el estudio del alba-tcp.

  3. Curricular Guidelines for Dental Auxiliary Radiology.

    Science.gov (United States)

    Journal of Dental Education, 1981

    1981-01-01

    AADS curricular guidelines suggest objectives for these areas of dental auxiliary radiology: physical principles of X-radiation in dentistry, related radiobiological concepts, principles of radiologic health, radiographic technique, x-ray films and intensifying screens, factors contributing to film quality, darkroom, and normal variations in…

  4. Cross-Curricular Science and History

    Science.gov (United States)

    Byrne, Eleanor

    2011-01-01

    Cross-curricular teaching and learning can be an approach that not only looks to amalgamate subjects together for the sake of greater understanding of each individual subject, but also to make meaningful connections between subjects based on disciplinary similarities. This involves a deeper understanding of each subject's specific characteristics…

  5. Gestión comunicacional de la agenda de internacionalización de los doctorados de la Universidad del Zulia

    Directory of Open Access Journals (Sweden)

    Mary Ollarves

    2012-05-01

    Full Text Available En la presente investigación el objetivo general fue determinar la gestión comunicacional de la agenda de internacionalización de los doctorados de la Universidad del Zulia, en las divisiones de estudios para graduados de las Facultades Ciencias Jurídicas y Políticas, Ciencias Económicas y Sociales y Humanidades y Educación. Se destacan los aportes de los autores Ramírez (2005, Serna (2000, Monzón (2001, Wimmer y Dominick (2001, Rivera (2008, Otegui (2008, Núñez (2008, Trejo (2001; Gacel-ávila (2000, García (2001, Jaramillo y De Lisio (2004, entre otros. El estudio es de tipo cuantitativoy se utilizó como técnica la entrevista semi estructurada dirigida a los directores de: Relaciones Interinstitucionales, General de Comunicación, Divisiones de Estudios para Graduados y Coordinadores de los programas de doctorados, todos de la Universidad del Zulia. La investigación propone integrar la gestión comunicacionala la agenda académica,para promocionar la política de internacionalización de los doctorados de la Universidad del Zulia en el marco de los convenios interinstitucionales. Los resultados demostraron que ciertamente, existe una debilidad en los principios básicos organizacionales y poco interés por proyectar una imagen corporativa, aunque se han hecho adelantos significativos desde la dirección de Relaciones Interinstitucionales y la División de Estudios para Graduados de la Facultad de Humanidades y Educación para posicionarse mundialmente en el área.

  6. Chemical composition and antigenotoxic properties of Lippia alba essential oils

    Directory of Open Access Journals (Sweden)

    Molkary Andrea López

    2011-01-01

    Full Text Available The present work evaluated the chemical composition and the DNA protective effect of the essential oils (EOs from Lippia alba against bleomycin-induced genotoxicity. EO constituents were determined by Gas Chromatography/Mass Spectrometric (GC-MS analysis. The major compounds encountered being citral (33% geranial and 25% neral, geraniol (7% and trans-β-caryophyllene (7% for L. alba specimen COL512077, and carvone (38%, limonene (33% and bicyclosesquiphellandrene (8% for the other, COL512078. The genotoxicity and antigenotoxicity of EO and the compounds citral, carvone and limonene, were assayed using the SOS Chromotest in Escherichia coli. The EOs were not genotoxic in the SOS chromotest, but one of the major compound (limonene showed genotoxicity at doses between 97 and 1549 mM. Both EOs protected bacterial cells against bleomycin-induced genotoxicity. Antigenotoxicity in the two L. alba chemotypes was related to the major compounds, citral and carvone, respectively. The results were discussed in relation to the chemopreventive potential of L. alba EOs and its major compounds.

  7. Onion and weed response to mustard (Sinapis alba) seed meal

    Science.gov (United States)

    Weed control in organic onion production is often difficult and expensive, requiring numerous cultivations and extensive hand-weeding. Onion safety and weed control with mustard seed meal (MSM) derived from Sinapis alba was evaluated in greenhouse and field trials. MSM applied at 110, 220, and 440 g...

  8. Chemical composition and antigenotoxic properties of Lippia alba essential oils.

    Science.gov (United States)

    López, Molkary Andrea; Stashenko, Elena E; Fuentes, Jorge Luis

    2011-07-01

    The present work evaluated the chemical composition and the DNA protective effect of the essential oils (EOs) from Lippia alba against bleomycin-induced genotoxicity. EO constituents were determined by Gas Chromatography/Mass Spectrometric (GC-MS) analysis. The major compounds encountered being citral (33% geranial and 25% neral), geraniol (7%) and trans-β-caryophyllene (7%) for L. alba specimen COL512077, and carvone (38%), limonene (33%) and bicyclosesquiphellandrene (8%) for the other, COL512078. The genotoxicity and antigenotoxicity of EO and the compounds citral, carvone and limonene, were assayed using the SOS Chromotest in Escherichia coli. The EOs were not genotoxic in the SOS chromotest, but one of the major compound (limonene) showed genotoxicity at doses between 97 and 1549 mM. Both EOs protected bacterial cells against bleomycin-induced genotoxicity. Antigenotoxicity in the two L. alba chemotypes was related to the major compounds, citral and carvone, respectively. The results were discussed in relation to the chemopreventive potential of L. alba EOs and its major compounds.

  9. Phytochemistry, pharmacology, and clinical trials of Morus alba.

    Science.gov (United States)

    Chan, Eric Wei-Chiang; Lye, Phui-Yan; Wong, Siu-Kuin

    2016-01-01

    The present review is aimed at providing a comprehensive summary on the botany, utility, phytochemistry, pharmacology, and clinical trials of Morus alba (mulberry or sang shu). The mulberry foliage has remained the primary food for silkworms for centuries. Its leaves have also been used as animal feed for livestock and its fruits have been made into a variety of food products. With flavonoids as major constituents, mulberry leaves possess various biological activities, including antioxidant, antimicrobial, skin-whitening, cytotoxic, anti-diabetic, glucosidase inhibition, anti-hyperlipidemic, anti-atherosclerotic, anti-obesity, cardioprotective, and cognitive enhancement activities. Rich in anthocyanins and alkaloids, mulberry fruits have pharmacological properties, such as antioxidant, anti-diabetic, anti-atherosclerotic, anti-obesity, and hepatoprotective activities. The root bark of mulberry, containing flavonoids, alkaloids and stilbenoids, has antimicrobial, skin-whitening, cytotoxic, anti-inflammatory, and anti-hyperlipidemic properties. Other pharmacological properties of M. alba include anti-platelet, anxiolytic, anti-asthmatic, anthelmintic, antidepressant, cardioprotective, and immunomodulatory activities. Clinical trials on the efficiency of M. alba extracts in reducing blood glucose and cholesterol levels and enhancing cognitive ability have been conducted. The phytochemistry and pharmacology of the different parts of the mulberry tree confer its traditional and current uses as fodder, food, cosmetics, and medicine. Overall, M. alba is a multi-functional plant with promising medicinal properties.

  10. CULTURAS DE LOS ESTUDIANTES DE INVESTIGACIÓN EN PROGRAMAS DE DOCTORADO EN EDUCACIÓN. Reflejos de un campo en definición

    OpenAIRE

    JOSÉ MARGARITO JIMÉNEZ MORA; MARÍA GUADALUPE MORENO BAYARDO; VERÓNICA ORTIZ LEFORT

    2011-01-01

    Este artículo presenta algunos hallazgos de un estudio de caso sobre las culturas académicas que permean las prácticas y los procesos de formación para la investigación educativa en tres programas de doctorado en Educación que se desarrollan en universidades de México. Se identifi can tres grupos específi cos de producción de culturas: estudiantes, formadores y administradores; se plantea que cada uno construye signifi cados sobre aspectos particulares de la investigación educativa dentro de ...

  11. CURRICULAR OFFER INFLUENCING STUDENTS’ SATISFACTION: COMPARATIVE STUDY

    OpenAIRE

    Oana DUMITRASCU; Constantin Manuel HILA

    2014-01-01

    The main objective of the study is the determination of students’ satisfaction regarding curricular activities. The study has been accomplished using the qualitative and quantitative research, using the bibliographic study, various secondary sources and different primary sources. The study is developed with a marketing research and accomplished using the survey method. 699 students from four universities have been questioned. Due to a comparative study the University of Applied Sciences Worms...

  12. Coherencia curricular y oportunidades para aprender Ciencias

    Directory of Open Access Journals (Sweden)

    Marcela Ruiz Zúñiga

    2014-12-01

    Full Text Available Se determinó la coherencia curricular entre oportunidades de aprendizaje y habilidades científicas ofrecidas por un texto escolar chileno y por las actividades de aula en 5º grado asociadas al contenido "Fuerza". Se realizó un análisis discursivo de la unidad didáctica del texto y de las actividades con el fin de construir matrices de contenido para tópicos y habilidades; la medición de coherencia curricular se realizó a través del índice de Porter para la coherencia. Los resultados muestran que el texto escolar promueve más observación (24.2% y menos ordenamiento de la información (0.95%. En las clases, predominó repetición de contenidos de manera oral y escrita (66.8% y menos análisis de hipótesis (1.6%. El índice de Porter entre el texto y el aula fue 0.360, entre el texto y el marco curricular fue 0.267. Se concluye que el texto y las clases ofrecen leves oportunidades para el desarrollo de las habilidades científicas.

  13. CURRICULAR OFFER INFLUENCING STUDENTS’ SATISFACTION: COMPARATIVE STUDY

    Directory of Open Access Journals (Sweden)

    Oana DUMITRASCU

    2014-11-01

    Full Text Available The main objective of the study is the determination of students’ satisfaction regarding curricular activities. The study has been accomplished using the qualitative and quantitative research, using the bibliographic study, various secondary sources and different primary sources. The study is developed with a marketing research and accomplished using the survey method. 699 students from four universities have been questioned. Due to a comparative study the University of Applied Sciences Worms, University of Applied Sciences Wiesbaden Rüsselsheim, University of Applied Sciences Frankfurt am Main and Nürtingen-Geislingen University have been analysed and their similarities and differences have been identified. The collected data, based on the established sample, is evaluated through univariate and bivariate analysis. In accordance with the evaluated sample, specific gaps from each region are identified regarding the curricular offer of the analysed universities. As a result to the conducted study, recommendations for the University of Applied Sciences Worms regarding the student’s satisfaction concerning the curricular offer are presented.

  14. Survey of Pharmacy Schools' Approaches and Attitudes toward Curricular Integration.

    Science.gov (United States)

    Poirier, Therese I; Fan, Jingyang; Nieto, Marcelo J

    2016-08-25

    Objective. To identify ways in which curricular integration is addressed in US pharmacy schools, the structure of therapeutics and foundational science courses, and perceptions of the effects current curricular integration methods have on student learning. Methods. An electronic survey was sent to academic leaders representing 131 pharmacy schools in the United States. Frequency data was tabulated and demographic analysis was performed. Results. Respondent data represents 94 schools of pharmacy. Arranging similar content from various disciplines in a course, a skills laboratory and pharmacy practice experiences were the most common methods for achieving curricular integration. More than one half of the schools indicated that foundational sciences were integrated with therapeutics. The most common reported challenge to curricular integration was logistics. Conclusion. Pharmacy education in the United States has evolved in addressing curricular integration in the curricula, which is consistent with changes in accreditation standards. Most pharmacy schools reported a variety of methods for achieving the intent of curricular integration.

  15. Acute hypotensive and diuretic activities of Artemisia herba alba aqueous extract in normal rats

    Institute of Scientific and Technical Information of China (English)

    Naoufel Ali Zeggwagh; Jean Baptiste Michel; Mohamed Eddouks

    2014-01-01

    Objective:To evaluate the effect of Artemisia herba alba (A. herba alba) intravenous injection on cardiovascular and renal function in normal rats. Methods:The effect of intravenous injection of A. herba alba extract at the different doses of 50, 100 and 200 mg/kg was investigated in normal rats. Diuresis, heart frequency and electrolytes concentrations were analyzed. Results: Intravenous bolus injection of A. herba alba at the different doses of 50, 100 and 200 mg/kg produced a dose dependent reduction in arterial blood pressure (P Conclusions: We conclude that the aqueous A. herba alba extract possesses a potent acute hypotensive effect on normal rats. In addition, A. herba alba perfusion may affect renal function to increase urine and electrolytes excretion.

  16. Regionalism and South American orientation: UNASUR and ALBA

    Directory of Open Access Journals (Sweden)

    Rut Diamint

    2013-04-01

    Full Text Available This study examines whether or not integration in South America is shaping a new type of regionalism. The author takes the cases of UNASUR and ALBA and shows – on the basis of the characteristics of institutionality, leaderships and identities – what the incentives for cooperation are. One of the essential elements for all integration is the defence agreements that are articulated in different ways in each of the organisations. The article attempts to show that both UNASUR and ALBA were structured using a new logic, by prioritising political agreements over commercial ones. The author describes a new South American notion that is still under construction, but which is more narrative- and discourse-oriented than involving formalised actions. As a result, we cannot conclude that this represents a new type of regionalism.

  17. Phenolic arids from the flowers of Nymphaea alba L.

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    Jerzy Jambor

    2014-01-01

    Full Text Available Nympheae alba flowers contain a variety of phenolic acids. Crystalline ellagic and gallic acids were isolated as well as their methyl and ethyl esters. Their identification was made on the basis of the results of spectral analyses 1H NMR, 13C NMR, MS, UV. Small amounts of p-hydroxybenzoic, p-cumaric, vanillic and ferulic acids were isolated. The presence of bound forms of acids in the material was demonstrated.

  18. Flavonoids from the flowers of Nymphaea alba L.

    Directory of Open Access Journals (Sweden)

    Jerzy Jambor

    2014-01-01

    Full Text Available Ten flavonoids were obtained from the flowers of Nymphaea alba L. Their structures were determined mainly on the basis of spectral analyses (UV, 'H NMR, MS. The following aglycons were isolated: quercetin, kaempferol, isokaempferide and apigenin as well as the following glycosides: quercetion 4'-β-xyloside, 3-methylquercetin 3'-β-xyloside and a mixture of quercetin 3-galactoside and 3-glucoside. The structures of three compounds obtained in very small amounts were determined in part.

  19. In vitro antimicrobial activity of mangrove plant Sonneratia alba

    Institute of Scientific and Technical Information of China (English)

    Shahbudin Saad; Muhammad Taher; Deny Susanti; Haitham Qaralleh; Anis Fadhlina Izyani Bt Awang

    2012-01-01

    Objective:To investigate the antimicrobial property of mangrove plant Sonneratia alba (S. alba). Methods: The antimicrobial activity was evaluated using disc diffusion and microdilution methods against six microorganisms. Soxhlet apparatus was used for extraction with a series of solvents, n-hexane, ethyl acetate and methanol in sequence of increasing polarity. Results:Methanol extract appeared to be the most effective extract while n-hexane extract showed no activity. The antimicrobial activities were observed against the gram positive bacteria Staphylococcus aureus (S. aureus) and Bacillus cereus (B. cereus), the gram negative Escherichia coli (E. coli) and the yeast Cryptococcus neoformans. Pseudomonas aeruginosa and Candida albicans appeared to be not sensitive to the concentrations tested since no inhibition zone was observed. E. coli (17.5 mm) appeared to be the most sensitive strain followed by S. aureus (12.5 mm) and B. cereus (12.5 mm). Conclusions:From this study, it can be concluded that S. alba exhibits antimicrobial activities against certain microorganisms.

  20. Calydorea alba (Iridaceae: Tigridieae, a new species from Uruguay Calydorea alba (Iridaceae: Tigridieae, una nueva especie de Uruguay

    Directory of Open Access Journals (Sweden)

    G. G. Roitman

    2005-12-01

    Full Text Available Calydorea alba is described from wet grasslands of northern Uruguay. The new species resembles Calydorea azurea, but can be easily distinguished by the smaller white flowers (3.2-3.6 cm wide vs. 4.4-5.3 cm wide, and linear subulate not truncate, style branches.Se describe Calydorea alba proveniente de pastizales húmedos del norte de Uruguay. Esta nueva especie se asemeja a Calydorea azurea, pero puede ser fácilmente distinguida por sus flores blancas más pequeñas (3,2-3,6 cm vs. 4.4-5.3 cm, de diámetro, y las ramas de estilo lineares, subuladas no truncadas.

  1. Curricular Deliberation about "Hamlet": An Exercise in the Practical.

    Science.gov (United States)

    Siegel, Judith Susan

    This study attempts to clarify and exploit Joseph Schwab's recent and current work on "practical" and "eclectic" curriculums in a simulated deliberation about a concrete curricular question, How might "Hamlet" be taught to one group of high school juniors? By exemplifying curricular deliberation, it aims to clarify…

  2. Curricular Critique of an Environmental Education Policy: Implications for Practice

    Science.gov (United States)

    Karrow, Douglas D.; Fazio, Xavier

    2015-01-01

    This paper provides a curricular critique of an environmental education policy framework called "Acting Today, Shaping Tomorrow" (Ontario Ministry of Education, 2009). Answers to the following two curricular questions: "What should be taught?" and "How it should be taught?" frame the critique. Scrutiny of the latter…

  3. Implementation of nephrology subspecialty curricular milestones.

    Science.gov (United States)

    Yuan, Christina M; Prince, Lisa K; Oliver, James D; Abbott, Kevin C; Nee, Robert

    2015-07-01

    Beginning in the 2014-2015 training year, the US Accreditation Council for Graduate Medical Education (ACGME) required that nephrology Clinical Competency Committees assess fellows' progress toward 23 subcompetency "context nonspecific" internal medicine subspecialty milestones. Fellows' advancement toward the "ready for unsupervised practice" target milestone now is tracked in each of the 6 competencies: Patient Care, Medical Knowledge, Professionalism, Interpersonal Communication Skills, Practice-Based Learning and Improvement, and Systems-Based Practice. Nephrology program directors and subspecialty societies must define nephrology-specific "curricular milestones," mapped to the nonspecific ACGME milestones. Although the ACGME goal is to produce data that can discriminate between successful and underperforming training programs, the approach is at risk to produce biased, inaccurate, and unhelpful information. We map the ACGME internal medicine subspecialty milestones to our previously published nephrology-specific milestone schema and describe entrustable professional activities and other objective assessment tools that inform milestone decisions. Mapping our schema onto the ACGME subspecialty milestone reporting form allows comparison with the ACGME subspecialty milestones and the curricular milestones developed by the American Society of Nephrology Program Directors. Clinical Competency Committees may easily adapt and directly translate milestone decisions reached using our schema onto the ACGME internal medicine subspecialty competency milestone-reporting format.

  4. Counter-Hegemonic Regionalism and Higher Education for All: Venezuela and the ALBA

    Science.gov (United States)

    Muhr, Thomas

    2010-01-01

    This paper employs new regionalism theory and regulatory regionalism theory in its analysis and theorisation of the Bolivarian Alliance for the Peoples of Our America (ALBA) as a counter-hegemonic Latin American and Caribbean (LAC) regionalism. As (initially) the regionalisation of Venezuela's Bolivarian Revolution, ALBA is centred around the idea…

  5. Morphogenetic responses ofPopulus alba L. under salt stress

    Institute of Scientific and Technical Information of China (English)

    Mejda Abassi; Khaled Mguis; Zoubeir Béjaoui; Ali Albouchi

    2014-01-01

    The morphogenetic responses to salt stress of TunisianPopu-lus alba clones were studied in order to promote their plantation in dam-aged saline areas. One year-old plants of threeP. alba clones (MA-104, MA-195 and OG) were subjected to progressive salt stress by irrigation during two consecutive years. The plants were grown in a nursery, inside plastic receptacles containing sandy soil and were irrigated with tap water (control) or 3-6 g/l NaCl solution. During this study, leaf epinasty, elongation rate, vigor, internode length, plant architecture, and number of buds were evaluated. Test clone response was highly dependent on the applied treatment and degree of accommodation.The most pronounced alterations were induced under 6g/l of NaCl treatment including leaf epinasty, leaf elongation rate delay, vigor decrease, internode length shortening, and morphogenetic modifications. These responses were less noticeable in the MA-104 clone with respect to the two other clones. The salt effect induced a delay in the leaf elongation rate on the MA-195 and OG clones leading to an early leaf maturity. The vigour and internode length of the MA-104 clone was less affected than the other clones. The OG clone was the most salt-sensitive thus, it developed shorter branches and more buds number than MA-195 and MA-104. The effect of long-term salt stress was to induce early flowering of theP. alba clones which suggests that mechanism of salt accommodation could be devel-oped.

  6. Diretrizes curriculares para o curso de pedagogia

    OpenAIRE

    Vieira. Suzane da Rocha

    2007-01-01

    Dissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências da Educação. Programa de Pós-Graduação em Educação. Este trabalho discute as Diretrizes Curriculares Nacionais para o Curso de Pedagogia # Resolução CNE/CP n. 1/06 (BRASIL, 2006b) # expedidas em 15 de maio de 2006. O estudo se articula às pesquisas dedicadas à reforma da formação inicial de professores da Educação Básica, implementada durante os anos de 1990, em especial após a Lei n. 9394/96 (BRASIL, 1996...

  7. AKTIVITAS ANTIOKSIDAN EKSTRAK KULIT BATANG TUMBUHAN MANGROVE Sonneratia alba

    OpenAIRE

    Herawati, Netti; Jalaluddin, Noor; Daha, La; Firdaus

    2009-01-01

    Ekstrak kulit batang kayu buli berpotensi sebagai anti oksidan. Ekstrak kulit batang tumbuhan mangrove Sonneratia alba dianalisis untuk menentukan aktivitas antioksidannya dengan metode DPPH. Empat macam ekstrak menunjukkan aktivitas antioksidan yang kuat (IC50< 200 ??g/ml). Ekstrak metanol memperlihatkan aktivitas tertinggi (IC50 9.8 ??g/ml) disusul ekstrak etil asetat (IC50 10.23 ??g/ml, kloroform (IC50 27.34 ??g/ml), dan heksan ( IC50147 ??g/ml). Ekstrak metanol dan etil asetat memiliki...

  8. Mode of antibacterial activity of Eclalbasaponin isolated from Eclipta alba.

    Science.gov (United States)

    Ray, A; Bharali, P; Konwar, B K

    2013-12-01

    The present study was undertaken to evaluate the mode of antibacterial activity of Eclalbasaponin isolated from Eclipta alba, against selected Gram-positive and Gram-negative bacteria. The probable chemical structure was determined by using various spectroscopic techniques such as Fourier transform infrared spectroscopy (FTIR) and mass spectroscopy. The antibacterial activity was evaluated by well diffusion technique, pH sensitivity, chemotaxis, and crystal violet assays. Eclalbasaponin showed clear zone of inhibition against both Bacillus subtilis and Pseudomonas aeruginosa and exhibited growth inhibition at the pH range of 5.5-9.0. The isolated saponin exhibited its positive chemoattractant property for both bacterial strains. Results of crystal violet assay and the presence of UV-sensitive materials in the cell-free supernatant confirmed the cellular damages caused by the treatment of Eclalbasaponin. The release of intracellular proteins due to the membrane damage was determined by sodium dodecyl sulfate polyacrylamide gel electrophoresis. Changes in the cell surface structure and membrane disruption were further revealed by FTIR and scanning electron microscopy analysis. The present study suggests that the isolated saponin from E. alba causes the disruption of the bacterial cell membrane which leads to the loss of bacterial cell viability.

  9. El diseño curricular, una responsabilidad compartida

    OpenAIRE

    Pedro Sarmiento; María Clara Tovar

    2011-01-01

    Introducción: El diseño o rediseño curricular de un programa académico incluye las fases de fundamentación, definiciónde ejes problemáticos y estructuración. El estudio pretende fomentar la reflexión sobre la práctica y la investigación en elcampo curricular y fortalecer las políticas institucionales relacionadas con el diseño curricular de los programas académicos,en procura de mejorar la pertinencia y la calidad del currículo.Objetivo: Describir las prácticas del diseño curricular en los pr...

  10. Strategic Curricular Decisions in Butler University's Actuarial Science Major

    Science.gov (United States)

    Wilson, Christopher James

    2014-01-01

    We describe specific curricular decisions employed at Butler University that have resulted in student achievement in the actuarial science major. The paper includes a discussion of how these decisions might be applied in the context of a new actuarial program.

  11. 22 CFR 229.455 - Textbooks and curricular material.

    Science.gov (United States)

    2010-04-01

    ... SEX IN EDUCATION PROGRAMS OR ACTIVITIES RECEIVING FEDERAL FINANCIAL ASSISTANCE Discrimination on the Basis of Sex in Education Programs or Activities Prohibited § 229.455 Textbooks and curricular...

  12. The mosaic of ancestral karyotype blocks in the Sinapis alba L. genome.

    Science.gov (United States)

    Nelson, Matthew N; Parkin, Isobel A P; Lydiate, Derek J

    2011-01-01

    The organisation of the Sinapis alba genome, comprising 12 linkage groups (n = 12), was compared with the Brassicaceae ancestral karyotype (AK) genomic blocks previously described in other crucifer species. Most of the S. alba genome falls into conserved triplicated genomic blocks that closely match the AK-defined genomic blocks found in other crucifer species including the A, B, and C genomes of closely related Brassica species. In one instance, an S. alba linkage group (S05) was completely collinear with one AK chromosome (AK1), the first time this has been observed in a member of the Brassiceae tribe. However, as observed for other members of the Brassiceae tribe, ancestral genomic blocks were fragmented in the S. alba genome, supporting previously reported comparative chromosome painting describing rearrangements of the AK karyotype prior to the divergence of the Brassiceae from other crucifers. The presented data also refute previous phylogenetic reports that suggest S. alba was more closely related to Brassica nigra (B genome) than to B. rapa (A genome) and B. oleracea (C genome). A comparison of the S. alba and Arabidopsis thaliana genomes revealed many regions of conserved gene order, which will facilitate access to the rich genomic resources available in the model species A. thaliana for genetic research in the less well-resourced crop species S. alba.

  13. Hypocholesterolemic and Antiatherosclerotic Potential of Basella alba Leaf Extract in Hypercholesterolemia-Induced Rabbits

    Directory of Open Access Journals (Sweden)

    Gunasekaran Baskaran

    2015-01-01

    Full Text Available Hypercholesterolemia is the major risk factor that leads to atherosclerosis. Nowadays, alternative treatment using medicinal plants gained much attention since the usage of statins leads to adverse health effects, especially liver and muscle toxicity. This study was designed to investigate the hypocholesterolemic and antiatherosclerotic effects of Basella alba (B. alba using hypercholesterolemia-induced rabbits. Twenty New Zealand white rabbits were divided into 5 groups and fed with varying diets: normal diet, 2% high cholesterol diet (HCD, 2% HCD + 10 mg/kg simvastatin, 2% HCD + 100 mg/kg B. alba extract, and 2% HCD + 200 mg/kg B. alba extract, respectively. The treatment with B. alba extract significantly lowered the levels of total cholesterol, LDL, and triglycerides and increased HDL and antioxidant enzymes (SOD and GPx levels. The elevated levels of liver enzymes (AST and ALT and creatine kinase were noted in hypercholesterolemic and statin treated groups indicating liver and muscle injuries. Treatment with B. alba extract also significantly suppressed the aortic plaque formation and reduced the intima: media ratio as observed in simvastatin-treated group. This is the first in vivo study on B. alba that suggests its potential as an alternative therapeutic agent for hypercholesterolemia and atherosclerosis.

  14. ¿ESTAMOS HACIENDO EVALUACIÓN CURRICULAR?

    OpenAIRE

    MESÍA MARAVÍ, RUBÉN

    2014-01-01

    Se trata de puntualizar lo que realmente significa el proceso de evaluación curricular como actividad integral que compromete a toda la institución que trata de llevarla a cabo. Se intenta distinguir el proceso evaluativo de las actividades parciales o sesgadas con las que a veces se confunde la evaluación curricular desde una perspectiva meramente tecnicista o efectivista.

  15. In vitro antibacterial activity of ethanolic extract of Morus alba leaf against periodontal pathogens

    Directory of Open Access Journals (Sweden)

    Shilpa Gunjal

    2015-01-01

    Results: P. gingivalis was the most sensitive organism against the M. alba extract with an MIC value of 1.95 mg/ml; while T. forsythia and P. gingivalis both were most sensitive organisms against chlorhexidine gluconate with MIC values of 0.00781 mg/ml. Conclusion: M. alba possess good antibacterial activity against A. actinomycetemcomitans, P. gingivalis and T. forsythia and thus would be beneficial for the prevention and treatment of periodontal disease. However, chlorhexidine gluconate was found to be more effective when compared to M. alba.

  16. TENDENCIAS HISTORIOGRÁFICAS VISTAS A TRAVÉS DE LAS TESIS DEL DOCTORADO EN CIENCIAS DE LA EDUCACIÓN RUDECOLOMBIA (1998 - 2007

    Directory of Open Access Journals (Sweden)

    Olga Yanet Acuña Rodríguez

    2009-01-01

    Full Text Available El presente artículo pretende hacer una reflexión sobre las temáticas y metodologías empeladas en el desarrollo de las tesis doctorales realizadas en el Doctorado en Ciencias de la Educación - RUDECOLOMBIA. Es de anotar que la base del programa de formación doctoral fue el proyecto sobre "Historia de la Universidad colombiana, 1774-1992", el que se ha enriquecido con la investigación y aporte de las tesis doctorales. Así, el objeto de estudio que es la Universidad, ha sido estudiado desde diversas tendencias historiográficas, en las que se resalta su papel en el contexto local y nacional. Esto nos ha permitido identificar algunas tendencias así: Historia institucional, historia social de la educación, élites y poder político, historia socio - cultural, historia de los saberes escolares; que nos han permitido identificar nuevos problemas, nuevas metodologías, nuevos actores, nuevas fuentes; que se contraponen al historicismo.

  17. Chemistry curricular knowledge of secondary school teachers

    Directory of Open Access Journals (Sweden)

    Tomašević Biljana

    2015-01-01

    Full Text Available the course of this research, we explored the extent of chemistry teachers’ professional knowledge related to the structure, contents and application of chemistry curricula and their components. The research comprised 119 teachers from 69 secondary schools (25 grammar schools and 44 vocational secondary schools. The questions in the questionnaire referred to general curriculum knowledge, knowledge of chemistry curriculum and the views/assessments of teachers concerning the necessary changes in the curricula currently in effect. The teachers’ answers show that the most important components of the curriculum for their work are the goals and operative tasks/outcomes. The results indicate that there exists information in the curriculum components that remains unused although it is relevant for a certain level of planning. Among the teachers in the sample, higher percentages of those with appropriate teachers training programme were applying information from the curriculum within teaching process through demonstration method and problem solving. The research that was conducted provides a basis for defining the indicators for monitoring the level of teachers’ capability to apply curricular knowledge in their practice. Such indicators are important for creating teaching situations and teachers’ activities within the framework of initial teacher education and continuing professional development. [Projekat Ministarstva nauke Republike Srbije, br. 179048: Scientific Theory and Practice in Society: Multidisciplinary, Educational and Inter-generational Perspectives

  18. Nuevos programas de máster y doctorado de la Universidade de Alcalá para la formación del profesorado en el marco del espacio europeo de educación superior (EEES

    Directory of Open Access Journals (Sweden)

    Christian Roith

    2011-03-01

    Full Text Available En la primera parte se presentan los principios de Salzburgo de 2005 para la formación de doctores en el EEES. A continuación se informa sobre las últimas tendencias en los estudios de doctorado en Europa. Un estudio comparativo llega a la conclusión que el sistema de formación de doctores en España se caracteriza actualmente por el formato minoritario de la formación exclusiva en programas estructurados, mientras que la mayoría de los países europeos tiende al doctorado en escuelas de posgrado cuya introducción está pendiente en España. Los paradigmas de la prevalencia de la investigación original y del estatus profesional del doctorando no se aceptan plenamente en España. No obstante, los nuevos programas de máster y doctorado del Departamento de Psicopedagogía de la Universidad de Alcalá que se presentan en la última parte intentan incorporar los paradigmas europeos identificados, cumpliendo simultáneamente con los requerimientos formales de la administración educativa española.

  19. Triterpenoid saponins from Lippia alba (Mill.) N. E. Brown

    Energy Technology Data Exchange (ETDEWEB)

    Farias, Mareni R.; Pertile, Roberto; Correa, Melissa M.; Schenkel, Eloir P., E-mail: marenif@yahoo.com.b [Universidade Federal de Santa Catarina (UFSC), Florianopolis, SC (Brazil). Dept. de Ciencias Farmaceuticas. Programa de Pos-graduacao em Farmacia; Almeida, Maria Tereza R. de; Palermo, Jorge A. [Universidad de Buenos Aires (Argentina). Facultad de Ciencias Exactas y Naturales. Dept. de Quimica Organica

    2010-07-01

    Two saponins were isolated from the leaves of Lippia alba. Their structures were established using one- and two-dimensional NMR spectroscopy and mass spectrometry. These new compounds were elucidated as 3-O-beta-D-glucopyranosyl-28-O-(alpha-L-rhamnopyranosyl-(1->3)-beta-D-xylopyranosyl -(1->4)-alpha-L-rhamnopyranosyl-(1->2)-alpha-L-arabinopyranosyl)-16alpha, 23-dihydroxy-olean -12-en-28-oic acid, named as Lippiasaponin I (2) and as 3-O-beta-D-glucopyranosyl-28-O-(alpha-L-rhamnopyranosyl-(1->3)-beta-D-xylopyranosyl- (1->4)-alpha-L-rhamnopyranosyl-(1->3)-alpha-Larabinopyranosyl)-16alpha,23-dihydroxy-olean -12-en-28-oic acid, named Lippiasaponin II (3). (author)

  20. Radioactively labelled phytic acid from maturing seeds of Sinapis alba

    Energy Technology Data Exchange (ETDEWEB)

    Blaicher, F.M.; Mukherjee, K.D.

    Maturing seeds of Sinapis alba were incubated with D-(U-/sup 14/C)glucose, sodium (1-/sup 14/C) acetate or myo-(U/sup 14/C) inositol in order to prepare radioactively labelled phytic acid with high specific activity. Although each substrate was utilized for the biosynthesis of phytic acid, maximum incorporation of radioactivity into phytic acid was found with myo-inositol. Radiochemical purity of the (U-/sup 14/C)phytic acid preparations was confirmed by chromatographic techniques. Such preparations should be useful for the study of interaction of phytic acid with metal ions and proteins and may serve as substrate in the assay should be useful for the study of interaction of phytic acid with metal ions and proteins and may serve as substrate in the assay of phytase.

  1. Adventitious bud regeneration from the stigma of Sinapis alba L.

    Directory of Open Access Journals (Sweden)

    Elżbieta Zenkteler

    2012-12-01

    Full Text Available Stigmas isolated from flower buds of 'Nakielska' variety of Sinapis alba were used to develop a micropropagation method suitable for breeding of new cultivars. The origin of adventitious bud regeneration was studied on MS medium, under stimulation by bezylaminopurine (BAP in combination with 2,4-D - dichlorophenoxyacetic acid (2,4-D. Histological analysis showed the structure of Sinapis stigma (composed from four types of tissue: papillae, transmitting tissue, parenchyma and vascular bundles and revealed that numerous meristematic centers developed from parenchyma cells in close vicinity of vascular bundles. Buds very quickly appeared on the surface of initial explants and later formed multiplantlets that were easily rooted in the soil.

  2. Chemical Diversity in Lippia alba (Mill.) N. E. Brown Germplasm

    Science.gov (United States)

    Camêlo, Lídia Cristina Alves; Pinheiro, José Baldin; Andrade, Thiago Matos; Alves, Péricles Barreto

    2015-01-01

    The aim of this study was to perform chemical characterization of Lippia alba accessions from the Active Germplasm Bank of the Federal University of Sergipe. A randomized block experimental design with two replications was applied. The analysis of the chemical composition of the essential oils was conducted using a gas chromatograph coupled to a mass spectrometer. The chemical composition of the essential oils allowed the accessions to be allocated to the following six groups: group 1: linalool, 1,8-cineole, and caryophyllene oxide; group 2: linalool, geranial, neral, 1,8-cineol, and caryophyllene oxide; group 3: limonene, carvone, and sabinene; group 4: carvone, limonene, g-muurolene, and myrcene; group 5: neral, geranial, and caryophyllene oxide; and group 6: geranial, neral, o-cymene, limonene, and caryophyllene oxide. PMID:26075292

  3. DEVELOPMENT POLICIES IN ALBA IULIA AREA OF INFLUENCE. AN INTEGRATED APPROACH

    Directory of Open Access Journals (Sweden)

    S. A. NICULA

    2015-06-01

    Full Text Available Development Policies in Alba Iulia Area of Influence. An Integrated Approach. The paper represents an integrated and holarchical perspective on the spatial development policies and its component measures and projects related to the City of Alba Iulia, its area of influence and the all-encompassing County of Alba, Romania. The goal was to see how the development and management policies from all levels merge into a single strategic framework that might create a favourable basis for the sustainable growth of Alba Iulia and its area of influence. As this area surrounding the city is subjected to different hierarchical plans and programmes, some that are not properly correlated, it is extremely clear that this area and Areas of Influence in general need legislative stipulations made specifically for them and also a well-thought holarchical planning approach.

  4. Effect of Eclipta alba on acute seizure models: a GABAA-mediated effect

    Directory of Open Access Journals (Sweden)

    M F Shaikh

    2013-01-01

    Full Text Available In the present study, anticonvulsant activity of methanol extract of Eclipta alba (10-200 mg/kg was studied using pentylenetetrazole- and picrotoxin-induced seizure models. Mechanism of effect of methanol extract of Eclipta alba was further elucidated by studying its GABA A receptor modulatory activity and its effect on levels of GABA in mice brain. Methanol extract of Eclipta alba exhibited potent anticonvulsant activity but has saturation of its pharmacological activity at 50 mg/kg. At the concentration of 10 mg/ml, contractions induced in guinea pig ileum was blocked by picrotoxin, but it didn′t not show any increase in GABA levels in mice brain after treatment. Hence, it can be concluded that methanol extract of Eclipta alba possesses potent anticonvulsant activity because of its positive modulatory effect on GABA A receptors.

  5. Atividade antimicrobiana de Lippia alba (Mill. N. E. Brown (Verbenaceae Antimicrobial activity of Lippia alba (Mill. N. E. Brown (Verbenaceae

    Directory of Open Access Journals (Sweden)

    Jaciana S. Aguiar

    2008-09-01

    Full Text Available Lippia alba (Mill. N. E. Brown (Verbenaceae, amplamente distribuída em todo o território brasileiro, é conhecida popularmente como erva cidreira e utilizada na medicina popular como analgésica, febrífuga, antiinflamatória, antigripal e nas afecções hepáticas. Extratos brutos foram preparados a partir de plantas cultivadas, de modo padronizado, em horta medicinal do Laboratório de Fitoterapia da Empresa Pernambucana de Pesquisa Agropecuária (IPA para a verificação da atividade antimicrobiana, in vitro, pelo método de difusão em disco de papel. A concentração inibitória mínima (CIM foi determinada para os extratos que exibiram melhores atividades. Os resultados obtidos mostraram que os extratos clorofórmico, acetônico e etanólico da raiz foram ativos frente a Staphylococcus aureus, Micrococcus luteus, Bacillus subtilis, Mycobacterium smegmatis, Candida albicans e Monilia sitophila e os extratos hexânicos, etanólicos e metanólicos das folhas inibiram S. aureus, M. luteus, B. subtilis, M. smegmatis e M. sitophila. A menor concentração inibitória (CIM = 31,2 µg/mL, foi obtida para o extrato clorofórmico da raiz frente a B. subtilis e M. luteus.Lippia alba (Mill. N. E. Brown (Verbenaceae, commonly known as "erva cidreira", is widely distributed throughout Brazil and is used in folk medicine as an analgesic, anti-inflammatory, cold remedy, as well as to reduce fevers and treat hepatic afflictions. Crude extracts of L. alba were prepared from plants cultivated in the medicinal garden of the Laboratório de Fitoterapia of the Empresa Pernambucana de Pesquisa Agropecuária (IPA, State of Pernambuco, Brazil, using standard techniques to test their in vitro antibacterial activity using the paper disk-diffusion method. The minimum inhibitory concentration (MIC was determined for those extracts demonstrating the highest activity. The results demonstrated that the chloroform, acetone and ethanol extracts of root material were

  6. Chemical characterization of Lippia alba essential oil: an alternative to control green molds

    OpenAIRE

    Jasmina Glamočlija; Marina Soković; Vele Tešević; Giani Andrea Linde; Nelson Barros Colauto

    2011-01-01

    The essential oil of Lippia alba is reported as an antifungal against human pathogenic microorganisms but few articles report its use as an alternative to synthetic fungicides on green mould control. The objective of this study was to determine chemical characteristics of L. alba essential oil and its antifungal activity against green molds as an alternative to synthetic fungicides. Essential oil was extracted by Clevenger hydrodistillation, characterized by GC-MS analysis, and the structure ...

  7. Allelopathic influence of aqueous extracts from the leaves of Morus alba L. on seed germination and seedling growth of Cucumis sativus L. and Sinapsis alba L.

    Directory of Open Access Journals (Sweden)

    Katarzyna Możdżeń

    2014-04-01

    Full Text Available The aim of the present study was to elucidate impact of the aqueous extracts from leaves of Morus alba L. on germination, growth and photosynthetic activity of Cucumis sativus L. and Sinapis alba L. Plants were grown for 21 days at the temperature 25°C (day and 18°C (night, within 12/12 hours photoperiod, light intensity 150 μmol·m-2·s-1 and relative humidity 60-70% (day/night. Our experiments proved that allelopathic compounds in aqueous extracts of the leaves M. alba at high concentrations, reduce power and energy of germination. Biometric analysis of seedlings and adult plants grown showed that allelopathic substances have stimulating or inhibiting function depending on the stage of treatment. Moreover, they cause changes in chlorophyll contents and activity of photosystem II (PS II.

  8. Eclipta Alba as Corrosion Pickling Inhibitor on Mild Steel in Hydrochloric Acid

    Institute of Scientific and Technical Information of China (English)

    M. Shyamala; A. Arulanantham

    2009-01-01

    Due to ease of application, cost effectiveness and environmentally safe, in this study, the corrosion inhibition effect of aqueous extract of Eclipta alba in 1 N hydrochloric acid has been investigated by weight loss, potentiodynamic polarization and impedance methods and the extracts of Eclipta alba were found to be effective corrosion pickling inhibitor. The effect of immersion time and temperature revealed that the extracts of Eclipta alba with an optimum concentration of 8.0% v/v showed maximum inhibition efficiency of 99.6% at 3 h immersion time and 30℃. Arrhenius plots for mild steel immersed in 1 N HCI solution in the absence and presence of optimum concentration (8.0% in v/v) of Eclipta alba extract showed the effect of temperature. Polarization studies indicate that this plant extract acts as a mixed type inhibitor. The adsorption of Eclipta alba follows Langmuir adsorption isotherm. The inhibition action may be due to the presence of the Wedelactone and also the alkaloid Ecliptine present in the leaves of Eclipta alba.

  9. Formulation and evaluation of antimicrobial activity of Morus alba sol-gel against periodontal pathogens

    Directory of Open Access Journals (Sweden)

    Shilpa Gunjal

    2015-01-01

    Full Text Available Background: Periodontitis has a multifactorial etiology, with primary etiologic agents being pathogenic bacteria that reside in the subgingival area. Recent advances in the field of alternative medicine introduced various herbal products for the treatment of periodontitis. Aim: To assess and compare the antimicrobial activity of Morus alba sol-gel with chlorhexidine sol-gel against ATCC standard strains of Aggregatibacter actinomycetemcomitans, Porphyromonas gingivalis, and Tannerella forsythia. Materials and Methods: Crude extract of Morus alba leaves was prepared by Soxhlet method by using ethanol as a solvent. Phytochemical screening of the crude extract of M. alba was performed to check the various chemical constituents. M. alba sol-gel and chlorhexidine sol-gel were formulated using Pluronic f127 and Pluronic f108 and compared for their antimicrobial activity. The minimum inhibitory concentration of both the gels was performed using agar well diffusion technique. Results: The minimum inhibitory concentration of M. alba sol-gel and chlorhexidine sol-gel against A. actinomycetemcomitans is 19 and 17 mm, T. forsythia is 12 and 21 mm, and P. gingivalis is 16 and 18 mm, respectively. Conclusion: Both M. alba and chlorhexidine sol-gel exhibited potent antimicrobial activity against periodontal pathogens.

  10. Tendencias en las líneas de investigación de doctorados en psicología de universidades iberoamericanas

    Directory of Open Access Journals (Sweden)

    Lizeth Reyes Ruiz

    2014-07-01

    Full Text Available En este artículo de investigación se analizaron las tendencias en las líneas de investigación declaradas por 32 universidades de Iberoamérica que cuentan con un programa de Doctorado en Psicología. El método de investigación fue exploratorio con corte bibliográfico y diseño descriptivo. Se analizaron en total 308 líneas de investigación y se identificaron tres tendencias: la primera, que agrupa diferentes campos en una sola línea, se encontró que la Psicología Clínica es el área de mayor interés. La segunda identifica líneas que emergen frente a las determinadas en principio, se evidenció como principal interés la cognición, y la tercera las articulaciones frecuentes entre varios campos disciplinares, las cuales se dieron principalmente en la Psicología Clínica y la Psicología de la Salud. Abstract Trends were analyzed in the research lines reported by 32 universities in Ibero-America that have at least a PhD program in Psychology. The research method was exploratory and descriptive with bibliographic cut design. 308 lines of research were analyzed in total and three trends were identified: the first, bringing together different fields on one line. It was found that Clinical Psychology is the area of greatest interest, the second, identifies lines that emerge in front of the ones determined by principles, as the main interest was evidenced cognition, and the third, the frequent joints between various disciplinary fields, which were mainly occur in Clinical Psychology and Health Psychology.

  11. O projecto curricular de turma : da teoria à praxis

    OpenAIRE

    Simões, Helena Isabel Pereira Lucas

    2009-01-01

    Dissertação de Mestrado em Supervisão Pedagógica apresentada à Universidade Aberta A reflexão desenvolvida ao longo deste trabalho situa-se no âmbito da Reorganização Curricular do Ensino Básico e tem como cerne o desenvolvimento curricular e os processos de colaboração que são desenvolvidos em educação. O Currículo Nacional, orientado para o desenvolvimento de competências, propõe a construção de Projectos Curriculares visando adequá-los ao contexto de cada escola e de cada...

  12. Dimensiones de la difusión curricular

    OpenAIRE

    Silva Águila, Manuel

    2014-01-01

    Los cambios curriculares prescritos al nivel central de la escolaridad, poseen en su implementación, una serie de condicionantes, que en su conjunto, facilitan o anulan su concreción a nivel de unidades educativas y aula. En ello ocupa una función central el proceso de difusión curricular, que tiene como misión comunicar, sensibilizar, comprometer a la comunidad educa-tiva con los propósitos que animan el cambio. Conocer la naturaleza, los niveles posibles de cambio, y el papel de las cultura...

  13. Tesis de doctorado tema colombiano

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    Boletín Cultural y Bibliográfico Banco de la República

    2004-09-01

    Full Text Available La lista publicada a continuación corresponde a tesis obsequiadas a la Biblioteca Luis Ángel Arango por el Institut des Hautes Études de l'Amérique Latine y por el Centre de Recherche et de Documentation sur l'Amérique Latine. Se recibieron en formato de microficha, como parte de una donación más amplia, que comprende 1.362 tesis sobre temas de América Latina. Acompaña la colección un CD-ROM que incluye un catálogo completo, que puede consultarse mediante búsquedas por autor, país, tema, título, periodo histórico, universidad, etc.

  14. Nanometer accuracy with continuous scans at the ALBA-NOM

    Science.gov (United States)

    Nicolas, Josep; Pedreira, Pablo; Å ics, Igors; Ramírez, Claudio; Campos, Juan

    2016-09-01

    We present the continuous scan operation of the ALBA-NOM as a working mode that allows obtaining low noise in short time, as well as high accuracy measurements. In the traditional step-scan operation, the position of the probe beam is kept fixed while many data points of autocollimator are averaged for noise reduction. This operation mode is very safe, as one has a perfect correspondence between mirror position and measured angle, but it is time inefficient, as it disregards all the data values acquired during motion, and basically averages data values taken under identical conditions. On the other hand, continuous scan is less safe in terms of correspondence between mirror position and slope, especially for NOM systems for which the autocollimator does not accept an electronic trigger. Nevertheless, it is possible to perform independent acquisitions of the autocollimator and of the linear stage data during a scan, and synchronize signals a posteriori. This solves the main problem of continuous scan with a NOM. Continuous scan operation for performing measurements is very efficient for noise reduction per unit time, as it allows integrating every single data value taken by the autocollimator. In addition, it opens the possibility of introducing pitch variations of the mirror between scans. This allows obtaining many independent datasets that can be combined using error suppression techniques to reduce not just noise but systematic errors too. In this paper we report the methods and the main results.

  15. Memory-enhancing activity of Rose alba in mice

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    Naikwade Nilofar

    2009-01-01

    Full Text Available Alzheimer′s disease (AD is a neurodegenerative disorder currently without an effective treatment. Impairment of memory is the initial and most significant symptom of AD. Memantine is the first novel class of AD medications acting on the glutaminergic system and produces symptomatic improvement in learning. Nootropic agents such as piracetam, aniracetam, and choline esterase inhibitors like donepezil are being used to improve memory, mood, and behavior, but the resulting side-effects associated with these agents have made their use limited. The present study was undertaken to investigate the effects of Rose alba (RA on learning and memory in mice. Male Swiss albino mice (3 months old weighing around 25 g were employed in the present investigation. Elevated plus-maze and passive-avoidance apparatus served as the exteroceptive behavioral models, and diazepam-induced amnesia served as the interoceptive behavioral models. RA (100 and 200 mg/kg p.o. was administered for eight successive days to the mice. Piracetam (200 mg/kg i.p. was used as a standard nootropic agent. RA improved learning and memory of mice as indicated by decreased transfer-latency and increased step-down latency. RA significantly reversed the amnesia induced by diazepam (1 mg/kg, i.p.. The results indicate that the aqueous extract of calyces of RA might prove to be a useful memory restorative agent in the treatment of cognitive disorders.

  16. DIMENSIONES CULTURALES DE LA NOCIÓN DE TUTORÍA ACADÉMICA EN DOCENTES Y ALUMNOS DE DOCTORADO, MÉXICO

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    María de los A. Aguilera V.

    2011-01-01

    Full Text Available En este artículo se presenta un estudio en donde se analizaron las dimensiones culturales de las tutorías académicas a través de describir los significados, explorar la estructura cognitiva y conocer el consenso cultural en los docentes y alumnos del Doctorado en Ciencias de la Salud en el Trabajo de la Universidad de Guadalajara. Método, Se trató de un estudio cualitativo con diseño descriptivo, transversal y exploratorio, realizado en México en el 2009. Los datos fueron recolectados con las técnicas listados libres y sorteo por montones, en fases sucesivas, y analizados en el modelo de dominios culturales. Resultados, La noción de tutoría académica se definió principalmente a través del apoyo y la asesoría. Las dimensiones cognitivas del concepto revelaron una visión diferente y complementaria en docentes y alumnos. En los docentes incluyó el equilibrio entre el proceso tutoral y las tareas tutorales. En los alumnos implicó un desarrollo muy amplio de las funciones de los tutores y en menor medida de los elementos para aprender. El elemento empatía se encontró ausente en los docentes, así como el uso de las herramientas para la actividad tutoral, los escenarios virtuales y la comunicación tutoral, en ambos informantes. Se observó consenso cultural en razón 5.101 en docentes y 3.516 en alumnos. Nivel promedio de competencia cultural 0.604 en docentes y 0.422 en alumnos. Conclusiones: Los elementos para considerarse en el diseño de nuevas estrategias comprenden una perspectiva complementaria entre docentes y alumnos que incluya un desarrollo muy claro y extenso de las funciones tutorales, de los elementos necesarios para aprender y del proceso tutoral.

  17. Innovar modelos de gestión para mejorar la calidad de los doctorados en educación en Colombia

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    Gilma Rosa Sanabria León

    2012-01-01

    Full Text Available La investigación que da origen a este artícul o se orientó a comprender los factores de calidad y las prácticas de gestión presentes en los Programas de Formación Doctoral en Educación en Colombia, centrada en el caso específico de un programa doctoral de la Ciudad de Bogotá. Se visibilizan preocupant es indicadores que reflejan deficiencias en los factores y características de calidad, tanto en lo relacionado a la organización, gestión e impacto social del conocimiento, como en los objetivos misionales del programa académico. Se evidencia además una ba ja producción académica y de investigación, y la que existe presenta un mediano impacto teórico, metodológico y social. Un Programa Doctoral en Educación endogámico, con poco diálogo e interacción con programas similares a nivel regional, nacional e intern acional, presentando un escaso trabajo colaborativo, en red y de conexiones que estimulen el debate de saberes necesario en este alto nivel de formación. Se identificaron también, sin embargo , fortalezas destacables vistas desde los indicadores nacionales e internacionales, a pesar de que las políticas nacionales e institucionales no apoyan en forma decidida ni estimulan los programas de investigación en educación. Así, este artículo plantea la necesidad de dar un salto a nuevos modelos de gestión educativa a partir del análisis de un caso concreto, desde la certeza de que la evaluación constituye el primer paso para redimensionar la organización del trabajo conjunto hacia la construcción de un sistema que permita mejorar la calidad de los doctorados en educ ación en Colombia.

  18. Lessons from industry: one school's transformation toward "lean" curricular governance.

    Science.gov (United States)

    Stratton, Terry D; Rudy, David W; Sauer, Marlene J; Perman, Jay A; Jennings, C Darrell

    2007-04-01

    As medical education grapples with organizational calls for centralized curricular oversight, programs may be compelled to respond by establishing highly vertical, stacked governance structures. Although these models offer discrete advantages over the horizontal, compartmentalized structures they are designed to replace, they pose new challenges to ensuring curricular quality and the educational innovations that drive the curricula. The authors describe a hybrid quality-assurance (QA) governance structure introduced in 2003 at the University of Kentucky College of Medicine (UKCOM) that ensures centralized curricular oversight of the educational product while allowing individualized creative control over the educational process. Based on a Lean production model, this approach draws on industry experiences that strategically separate institutional accountability (management) for a quality curriculum from the decision-making processes required to ensure it (production). In so doing, the authors acknowledge general similarities and key differences between overseeing the manufacture of a complex product versus the education of a physician-emphasizing the structured, sequential, and measurable nature of each process. Further, the authors briefly trace the emergence of quality approaches in manufacturing and discuss the philosophical changes that accompany transition to an institutional governance system that relies on vigorous, robust performance measures to offer continuous feedback on curricular quality.

  19. Extra-Curricular Activities and Academic Performance in Secondary Students

    Science.gov (United States)

    Moriana, Juan Antonio; Alos, Francisco; Alcala, Rocio; Pino, Maria-Jose; Herruzo, Javier; Ruiz, Rosario

    2006-01-01

    Introduction: In this paper we study the possible influence of extra-curricular activities (study-related and/or sports) on academic performance of first- and second-year pupils in "Educacion Secundaria Obligatoria (ESO)" [N.T. seventh- and eighth-graders]. Method: We randomly selected 12 schools in the city (9 public and 3 private), and…

  20. Hamline/3M Corp. Project: Liason for Curricular Change*

    Science.gov (United States)

    Artz, Jerry L.

    2002-04-01

    This project was designed to catalyze curricular changes to better prepare students for the workplace. Industrial managers provided a list of 16 characteristics valued in the workplace; most were NOT related to science course content. The project formed 5 teams each including 3M professionals and students. Each team developed curricular changes in one of the 16 areas. Team goals were to improve skills in communication, data analysis, business/economics, team problem solving, and cultural competency. Curricular changes realized include communication skill activities embodied in science courses and faculty communication teaching skill seminars; self learning tools in data analysis, statistics and model building; a new course developed with assistance from 3M personnel focusing on topics directly related to technological industries; high performance team problem solving training/coaching for faculty; workshops for students and faculty relative to importance of cultural competencies in the workplace; and a new course focusing on culture, team problem solving and conflict resolution in the technical workplace. Process for developing and content of curricular changes will be reported. *Thanks to: NSF GOALI CHE-99010782

  1. Hamline/3M Project: Liaison for Curricular Change

    Science.gov (United States)

    Rundquist, Andy

    2002-03-01

    This project was designed to catalyze curricular changes to better prepare students for the workplace. Industrial managers provided a list of 16 characteristics valued in the workplace: most were NOT related to science course content. The project formed 5 teams each including 3M professionals and students. Each team developed curricular changes in one of the 16 areas. Team goals were to improve skills in communication, data analysis, business/economics, team problem solving, and culture competency. Curricular changes realized include communication skill activities embodied in science courses and faculty communication teaching skill seminars, self learning tools in data analysis, statistics and model building, a new course developed with assistance from 3M personnel focussing on topics directly related to technological industries, high performance team problem solving training/coaching for faculty and workshops for students and faculty relative to importance of cultural competencies in the workplace, and a new course focusing on culture, team problem solving and conflict resolution in the technical workplace. Process for developing and content of curricular changes will be reported.

  2. American Association of Dental Schools Curricular Guidelines for Oral Radiology.

    Science.gov (United States)

    Journal of Dental Education, 1980

    1980-01-01

    Oral radiology curricular guidelines developed by the American Association of Dental Schools are provided. The guidelines describe minimal conditions under which a satisfactory educational experience can be offered. Principles of x-radiation, radiobiological concepts, radiological health, radiographic technique, radiographic quality, and darkroom…

  3. History, Music and Law: Commemorative Cross-Curricularity

    Science.gov (United States)

    Woodcock, James

    2013-01-01

    James Woodcock continues his theme from "Teaching History 138" about the difference between superficial, thematic cross-curricularity and much more rigorous interdisciplinarity. His concern is to retain rather than compromise the integrity of the subject disciplines. Woodcock argues that interdisciplinary working adds value to learning…

  4. Factors That Shape Curricular Reasoning about College Algebra Reform

    Science.gov (United States)

    Burn, Helen E.

    2012-01-01

    This multiple case study explores factors that shaped the curricular reasoning of mathematics faculty engaged in college algebra reform in community colleges. Overall, the study found that although proposed reform of college algebra is broad in scope and influenced by the student audience, competing influences emerge that can enable or constrain…

  5. Retention of Economics Principles by Undergraduates on Alternative Curricular Structures

    Science.gov (United States)

    Johnson, Daniel K. N.; Lybecker, Kristina M.; Taylor, Corrine H.

    2011-01-01

    The authors investigated whether the curricular structure of an economics course (semester, trimester, or compressed block schedule) has an effect on an undergraduate's subsequent retention of course material, while controlling for other relevant differences. They tested separately for theoretical or process comprehension and for graphical…

  6. Enhancing and Enacting Curricular Progressions in Elementary Mathematics

    Science.gov (United States)

    Land, Tonia J.; Drake, Corey

    2014-01-01

    In this study, we examined how curricular resources supported three expert teachers in their enactment of progressions. Using a video-stimulated interview process, we documented the multiple types of progressions identified, described, and enacted by the teachers. Results indicate that the teachers used four different types of…

  7. Opening the Mind? Geographies of Knowledge and Curricular Practices

    Science.gov (United States)

    Tange, Hanne; Millar, Sharon

    2016-01-01

    Inspired by Bourdieu's ("Homo Academicus, Polity," Cambridge, 1988; "The Logic of Practice, Polity," Cambridge, 1990) ideas of knowledge reproduction, the article presents an empirical mapping of knowledge geographies, as manifest in the curricular practices found within a single international MA programme in Denmark. Following…

  8. Curricular adaptation: alternatives of pedagogical support in the inclusive education

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    Lucia Pereira Leite

    2010-12-01

    Full Text Available The organization of the inclusive education is a slow and complex process, which has the necessity of investments in supports for all the scholar team. Aiming at spreading one of the actions carried out for the promotion of the inclusive educational practices in a municipal education system in a western city in the state of São Paulo, this paperwork has the objective of presenting an elaborated manual of orientations for the implementation of the individual curricular adaptations (ACIs for students who demand special educational necessities.(NEEs. The material was constituted on the basis of three data sets: 1 tabulation of the evaluations of the curricular adaptations already made; 2 the literature review; 3 analysis of the themes which have emerged during case discussion meetings mediated by the researchers with teachers from the Specialized Pedagogical Support Service (SAPE, with teachers and administrators from the common education system and the technical-pedagogical team. The final version of the manual contemplates the theoretical-operational aspects about the themes: flexibility and curricular adequation, inclusive education, definitions of NEEs, how SAPE works; and it finishes with a model proposal of ACI. It is expected that the spreading of this material can subside new curricular propositions for students with deficiency that are very distant from the academic level expected for the current scholar year.

  9. Extra-Curricular Activities and Academic Performance in Secondary Students

    Science.gov (United States)

    Moriana, Juan Antonio; Alos, Francisco; Alcala, Rocio; Pino, Maria-Jose; Herruzo, Javier; Ruiz, Rosario

    2006-01-01

    Introduction: In this paper we study the possible influence of extra-curricular activities (study-related and/or sports) on academic performance of first- and second-year pupils in "Educacion Secundaria Obligatoria (ESO)" [N.T. seventh- and eighth-graders]. Method: We randomly selected 12 schools in the city (9 public and 3 private), and randomly…

  10. Colonization with Arbuscular Mycorrhizal Fungi Promotes the Growth of Morus alba L. Seedlings under Greenhouse Conditions

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    Nan Lu

    2015-03-01

    Full Text Available Morus alba L. is an important tree species planted widely in China because of its economic value. In this report, we investigated the influence of two arbuscular mycorrhizal fungal (AMF species, Glomus mosseae and Glomus intraradices, alone and together, on the growth of M. alba L. seedlings under greenhouse conditions. The growth parameters and physiological performance of M. alba L. seedlings were evaluated 90 days after colonization with the fungi. The growth and physiological performance of M. alba L. seedlings were significantly affected by the AMF species. The mycorrhizal seedlings were taller, had longer roots, more leaves and a greater biomass than the non-mycorrhizae-treated seedlings. In addition, the AMF species-inoculated seedlings had increased root activity and a higher chlorophyll content compared to non-inoculated seedlings. Furthermore, AMF species colonization increased the phosphorus and nitrogen contents of the seedlings. In addition, simultaneous root colonization by the two AMF species did not improve the growth of M. alba L. seedlings compared with inoculation with either species alone. Based on these results, these AMF species may be applicable to mulberry seedling cultivation.

  11. SimAlba: a Spatial Microsimulation approach to the analysis of health inequalities

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    Malcolm Campbell

    2016-10-01

    Full Text Available This paper presents applied geographical research based on a Spatial Microsimulation model, SimAlba aimed at estimating geographically sensitive health variables in Scotland. SimAlba has been developed in order to answer a variety of 'what-if' policy questions pertaining to health policy in Scotland. Using the SimAlba model, it is possible to simulate the distributions of previously unknown variables at the small area level such as; smoking, alcohol consumption, mental well-being and obesity. The SimAlba microdataset has been created by combining Scottish Health Survey (SHS and Census data using a deterministic reweighting Spatial Microsimulation algorithm developed for this purpose. The paper presents SimAlba outputs for Scotland’s largest city, Glasgow and examines the spatial distribution of the simulated variables for small geographical areas in Glasgow as well as the effects on individuals of different policy scenario outcomes. In simulating previously unknown spatial data a wealth of new perspectives can be examined and explored. This paper explores a small set of those potential avenues of research and shows the power of spatial microsimulation modelling in an urban context.

  12. SimAlba: A Spatial Microsimulation Approach to the Analysis of Health Inequalities.

    Science.gov (United States)

    Campbell, Malcolm; Ballas, Dimitris

    2016-01-01

    This paper presents applied geographical research based on a spatial microsimulation model, SimAlba, aimed at estimating geographically sensitive health variables in Scotland. SimAlba has been developed in order to answer a variety of "what-if" policy questions pertaining to health policy in Scotland. Using the SimAlba model, it is possible to simulate the distributions of previously unknown variables at the small area level such as smoking, alcohol consumption, mental well-being, and obesity. The SimAlba microdataset has been created by combining Scottish Health Survey and Census data using a deterministic reweighting spatial microsimulation algorithm developed for this purpose. The paper presents SimAlba outputs for Scotland's largest city, Glasgow, and examines the spatial distribution of the simulated variables for small geographical areas in Glasgow as well as the effects on individuals of different policy scenario outcomes. In simulating previously unknown spatial data, a wealth of new perspectives can be examined and explored. This paper explores a small set of those potential avenues of research and shows the power of spatial microsimulation modeling in an urban context.

  13. Producción científica de los programas de Doctorado en Psicología Clínica y de la Salud de España

    Directory of Open Access Journals (Sweden)

    Bertha Musi-Lechuga

    2009-01-01

    Full Text Available El objetivo de este estudio descriptivo es analizar la producción científica de los programas de Doctorado de Psicología Clínica y/o de la Salud, evaluada ésta a través de los profesores que imparten docencia en estos programas. Un segundo objetivo es comprobar si los programas de Doctorado con mención de calidad tienen una mayor producción científica que los que no poseen esta mención. Para ello, se analizó la producción de artículos publicados en revistas incluidas en las bases de datos Web of Science y en IN-RECS, y de las tesis doctorales dirigidas y registradas en la base de datos TESEO de 375 profesores pertenecientes a 17 programas de Doctorado. Se han obtenido 2.772 artículos en la Web of Science, 2.479 artículos en IN-RECS y 604 tesis doctorales en TESEO. En función de estos resultados se elaboró un ranking de programas por cada uno de los criterios. Posteriormente se hizo un ranking global ponderando cada criterio en función del peso asignado por la comunidad científica a cada uno de los indicadores. Por último se compararon los resultados en global de los programas que tienen mención de calidad frente a los que no la tienen y los resultados ponen de manifiesto que los primeros duplican la producción científica con respecto a los segundos en todos los criterios.

  14. ¿Cómo tener éxito en un doctorado en Psicología? Opinión de los directores de Tesis Doctorales más productivos en España

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    Diana Agudelo

    2003-01-01

    Full Text Available En este trabajo se realiza un análisis de las opiniones de los directores más productivos en Tesis Doctorales de las áreas académicas de la Psicología española entre 1992 y 2001. El método empleado fue una entrevista sobre diferentes aspectos del doctorado y cómo realizarlo con éxito. Las opiniones de los 21 directores entrevistados constituyeron la unidad de análisis. Los resultados revelan distintas perspectivas de los directores, destacando múltiples argumentos como razones para realizar un doctorado, los criterios considerados para seleccionar al tutor/director de tesis según su calidad y trayectoria investigadora, la elección de los cursos acorde con los intereses del doctorando y los docentes que los imparten, y la determinación del tema de tesis por su utilidad y aplicabilidad. Se proponen medidas de mejora para el tercer ciclo en España, encaminadas a regular la calidad del profesorado y la selección de los alumnos y ofrecer mayor disponibilidad de recursos económicos y de infraestructura para el desarrollo de la investigación. Se realizan reflexiones sobre la utilidad de estas opiniones, el panorama de los estudios de doctorado en general y la importancia de replantear algunos aspectos de la formación doctoral en España con el objetivo de alcanzar los estándares de calidad requeridos.

  15. POLÍTICAS CURRICULARES NO BRASIL NOS GOVERNOS FHC E LULA: CONTINUIDADE?

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    Mariclei Przylepa

    2015-08-01

    Full Text Available O presente artigo objetiva problematizar as políticas curriculares elaboradas e efetivadas nos governos FHC e Lula, a partir do contexto de reforma de Estado materializada na década de 1990. Nessa direção o estudo inicia abordando a política curricular no contexto da reforma de Estado, evidencia a proposta educacional do governo FHC, discute sua política curricular, via parâmetros curriculares nacionais, e finaliza analisando a política curricular implementada no primeiro ano do governo Lula.

  16. PHYTOCHEMICAL CHARACTERISATION AND PHARMACOLOGICAL EVALUATION OF METHANOLIC EXTRACT OF AVICENNIA ALBA

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    Sandip Kr. Baidya et al

    2012-10-01

    Full Text Available The history of herbal medicines is as old as civilization. For this purpose of ascertaining the phytochemical constituents, the present work was performed into the phytochemical investigation of the plant Avicenna alba. Separation and isolation of the constituents of interest, characterization of isolated compounds and investigation of the biosynthetic pathways of the particular pathway and quantitative evaluation. Another reason for choosing this plant is the availability of the plant. Avicenna alba is the important plant used from the past. It was reported to show antimicrobial activity in literature survey. So now, the time has come to perform a proper phytochemical investigation to find its proper way into medicine. Our plan of work is to identify and isolate the chemical constituents of the aerial part of Avicennia alba and to evaluate its pharmacological action. With the above aim, this experimental work was undertaken.

  17. Annotation and Re-Sequencing of Genes from De Novo Transcriptome Assembly of Abies alba (Pinaceae

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    Anna M. Roschanski

    2013-01-01

    Full Text Available Premise of the study: We present a protocol for the annotation of transcriptome sequence data and the identification of candidate genes therein using the example of the nonmodel conifer Abies alba. Methods and Results: A normalized cDNA library was built from an A. alba seedling. The sequencing on a 454 platform yielded more than 1.5 million reads that were de novo assembled into 25 149 contigs. Two complementary approaches were applied to annotate gene fragments that code for (1 well-known proteins and (2 proteins that are potentially adaptively relevant. Primer development and testing yielded 88 amplicons that could successfully be resequenced from genomic DNA. Conclusions: The annotation workflow offers an efficient way to identify potential adaptively relevant genes from the large quantity of transcriptome sequence data. The primer set presented should be prioritized for single-nucleotide polymorphism detection in adaptively relevant genes in A. alba.

  18. Flour from Prosopis alba cotyledons: A natural source of nutrient and bioactive phytochemicals.

    Science.gov (United States)

    Cattaneo, F; Costamagna, M S; Zampini, I C; Sayago, J; Alberto, M R; Chamorro, V; Pazos, A; Thomas-Valdés, S; Schmeda-Hirschmann, G; Isla, M I

    2016-10-01

    The Prosopis alba seed is a waste material in the process to produce pod flour. To suggest a potential use of these seeds it is necessary to determine the nutritional, phytochemical and functional quality of cotyledon flour from Prosopis alba. This flour showed high level of proteins (62%), low content of total carbohydrate and fat. Free polyphenol (1150±20mg GAE/100g flour) and carotenoids (10.55±0.05mg β-CE/100g flour) compounds were the dominant compounds. The main identified constituents in the polyphenolic extracts were C- glycosyl flavones, including schaftoside, isoschaftoside, vicenin II, vitexin and isovitexin. The extract enriched in polyphenolic compounds exhibited ABTS(+) reducing capacity and scavenging activity of H2O2; and was able to inhibit phospholipase, lipoxygenase and cyclooxygenase, three pro-inflammatory enzymes. According to our results, the P. alba cotyledon flour could be considered as a new alternative in the formulation of functional foods or food supplements.

  19. Identification and evaluation of anti Hepatitis C Virus phytochemicals from Eclipta alba

    Science.gov (United States)

    Manvar, Dinesh; Mishra, Mahesh; Kumar, Suriender; Pandey, Virendra N.

    2012-01-01

    Ethnopharmacological relevance Eclipta alba, traditionally known as bhringraj, has been used in Ayurvedic medicine for more than 1000 years in India. It is used for the treatment of infective hepatitis, liver cirrhosis, liver enlargement and other ailments of liver and gall bladder in India. Aim of the study To evaluate anti-hepatitis C virus activity present in the Eclipta alba extract, perform bioassay based fractionation and identify anti-HCV phytochemicals from the active fractions. Materials and methods Identification of active compounds was performed by bio-activity guided fractionation approach. Active isolates were separated by the combination of silica gel chromatography and preparative scale reverse phase HPLC. Eclipta alba extract and its isolates were examined for their ability to inhibit HCV replicase (HCV NS5B) activity in vitro and HCV replication in a cell culture system carrying replicating HCV subgenomic RNA replicon. The purified isolates were also examined for their binding affinity to HCV replicase by fluorescence quenching and their cytotoxicity by MTT assay. Results Eclipta alba extract strongly inhibited RNA dependent RNA polymerase (RdRp) activity of HCV replicase in vitro. In cell culture system, it effectively inhibited HCV replication which resulted in reduced HCV RNA titer and translation level of viral proteins. Bioassay-based fractionations of the extracts and purification of anti-HCV phytochemicals present in the active fractions have identified three compounds, wedelolactone, luteolin, and apigenin. These compounds exhibited dose dependent inhibition of HCV replicase in vitro, and anti-HCV replication activity in the cell culture system Conclusion Eclipta alba extract and phytochemicals isolated from active fractions display anti-HCV activity in vitro and in cell culture system. The standardized Eclipta alba extract or its isolates can be used as an effective alternative and complementary treatment against HCV. PMID:23026306

  20. Lippia alba essential oil promotes survival of silver catfish (Rhamdia quelen) infected with Aeromonas sp.

    OpenAIRE

    FERNANDO J. SUTILI; Cunha,Mauro A.; Rosangela E. Ziech; Krewer,Carina C.; CARLA C. ZEPPENFELD; Heldwein, Clarissa G.; Gressler, Leticia T.; Berta M. Heinzmann; Agueda C. de Vargas; BERNARDO BALDISSEROTTO

    2015-01-01

    In vitro and in vivo activity of the Lippia alba essential oil (EO) against Aeromonas sp. was evaluated. In the in vitro assay the minimum inhibitory concentration (MIC) and a minimum bactericidal concentration (MBC) of EO for Aeromonas cells were determined using the microdilution method. Twenty five strains of Aeromonas sp. isolated from infected fish obtained from local fish farms were used. MIC and MBC values were 2862 and 5998 µg mL-1 for L. alba EO and 0.5 and 1.2 µg mL-1 for ...

  1. Praxis educativa ecopacifista de enriquecimiento curricular: Conceptuacion, diseno y divulgacion

    Science.gov (United States)

    Osorio, Carlos Agustin Muniz

    A general consensus exists that the present worldwide state of the natural environment is in crisis. Tied to this crisis, the social dimension presents a discouraging picture in aspects like violence and poverty. The predominant neoliberal economic system---ecocidal and genocidal---just as the production system that sustains it, affects this crisis. Puerto Rico, in its political and economic relationship with the United States of America, is not exempt of this situation. Education arises as an alternative to transform this reality. Science education has the potential to address these socio-environmental problems in a creative way. From a scientific educational framework, we conceptualized, designed and disseminated diverse approaches and tools that integrate socio-ecological and environmental aspects, as well as issues related to violence, conflict and peace. The central research questions were: At present, what are some of the main characteristics of the social-ecological and environmental global and local (glocal) issues and what relation do they have with formal education?; What is the ethical responsibility of science education when, facing social-ecological and environmental situations and issues concerning peace?; What educational foundations justify the "Praxis Educativa Ecopacifista de Enriquecimiento Curricular" as an alternative to the situations and issues considered?; What didactic tools do we propose?; What curricular design and revision processes do we propose? What dissemination processes do we propose? The nature of our methodology is qualitative and is centered around curricular design. It includes a research-theoretical dimension, a practical-research dimension, and systematizing of learning elements. We emphasize the conceptualization of the theoretical-philosophical and methodological dimensions of the ecopacifist approach and its fundamental principles. We highlight the praxis, integrating creativity, intelligence and talent development

  2. Venezuela e ALBA: regionalismo contra-hegemônico e ensino superior para todos Venezuela and the ALBA: counter-hegemonic regionalism and higher education for all

    Directory of Open Access Journals (Sweden)

    Thomas Muhr

    2010-08-01

    Full Text Available Partindo de um quadro teórico neo-gramsciano crítico à globalização, este artigo aplica a nova teoria do regionalismo (NTR e a teoria do regionalismo regulatório (TRR à sua análise e teorização dos tratados de comércio da Aliança Bolivariana para os Povos da Nossa América (ALBA-TCP como regionalismo contra-hegemônico na América Latina e Caribe (ALC. A ALBA está centrada na ideia de um Socialismo do Século XXI, que, como (inicialmente também a Revolução Bolivariana da Venezuela, substitui a 'vantagem competitiva' pela 'vantagem cooperativa'. Em seu caráter de conjunto de processos multidimensionais e transnacionais a ALBA-TCP opera dentro de/transversalmente a um número de setores e escalas, ao mesmo passo que as transformações estruturais são movidas pela interação de agentes do Estado e agentes não estatais. A política de Educação Superior para Todos (ESPT do governo venezuelano rejeita a agenda neoliberal globalizada de mercadorização, privatização e elitismo e reinvindica educação pública gratuita em todos os níveis como um direito humano fundamental. A ESPT está sendo regionalizado em um espaço educacional emergente da ALBA e assume um papel-chave nos processos de democracia direta e participatória, dos quais a construção popular (bottom-up da contra-hegemonia e a redefinição política e econômica da ALC dependem. Antes de produzir sujeitos empreendedores conformes ao capitalismo global, a ESPT procura formar subjetividades ao longo de valores morais de solidariedade e cooperação. Isso será ilustrado com referência a um estudo etnográfico de caso da Universidade Bolivariana da Venezuela (UBV.This paper employs new regionalism theory and regulatory regionalism theory in its analysis and theorisation of the Bolivarian Alliance for the Peoples of Our America (ALBA as a counter-hegemonic Latin American and Caribbean (LAC regionalism. As (initially the regionalisation of Venezuela's Bolivarian

  3. Student-Initiated Sexual Health Selective as a Curricular Tool

    Directory of Open Access Journals (Sweden)

    Katie Johnson, BS

    2015-06-01

    Conclusions: The 1-week SHS was successfully implemented through the teamwork of a medical student and faculty champion. It resulted in more accurate knowledge and more open attitudes toward sexual health among participating medical students. Potential benefits to undergraduate medical educators are reviewed. Johnson K, Rullo J, and Faubion S. Student-initiated sexual health selective as a curricular tool. Sex Med 2015;3:118–127.

  4. CURRICULAR DESIGN FOR THE CONSTRUCTION OF A PEACE CULTURE

    OpenAIRE

    Raiza González; Carmen Zabala; Hercilia Berrueta

    2009-01-01

    This investigation had as purpose from the analysis of the contributions of sciences of the conduct, pedagogical and spiritual, to apply a curricular design for the development of competitions  in the educational one like mediator of a culture of peace in the classroom. study was descriptive, of action-reflection-intervention in the modality of study of case with application of tests you diagnose, observation log, shootings, psicoterapéuticas interviews, techniques and factories, considering ...

  5. LA PALABRA DIBUJADA. ANTONIO FERNÁNDEZ-ALBA, PRIMER Y ÚLTIMO MAESTRO / The drawn word. Antonio Fernández-Alba, first and last master

    Directory of Open Access Journals (Sweden)

    Juan Luis Trillo de Leyva

    2015-05-01

    Full Text Available Távora y Fernández-Alba son figuras de referencia ineludible para quienes quieran hoy investigar el origen contemporáneo de la arquitectura peninsular y, sobre todo, de sus escuelas. Alba fue siempre una guía para los que abordamos una enseñanza alejados del aura que acompañaba a los grandes arquitectos madrileños y barceloneses. Su experimentación didáctica alteró la trayectoria de las escuelas de arquitectura españolas. Introdujo la cultura contemporánea en la universidad como si se tratara de una segunda naturaleza, de un nuevo estrato territorial de los proyectos, manteniendo al hombre como objeto central y destinatario de todo proceso proyectual. En época de virtualidad y representación automatizada, nada más adecuado que la revisión de los dibujos del maestro Fernández-Alba. Dibujos que requieren ser proyectados, pensados, antes que ejecutados, “proyectos de proyectos”, una especie de tautología que rige la mente del poeta en su continua reducción, compresión o destilación, gota a gota, del mundo real, del universo y la palabra.

  6. Hepatoprotective activity of Eclipta alba against carbon tetrachloride-induced hepatotoxicity in albino rats

    Directory of Open Access Journals (Sweden)

    Ravindra S. Beedimani

    2015-06-01

    Conclusion: The results of the study confirmed the hepatoprotective activity of aqueous extracts of E. alba at doses of 250 mg/kg and 500 mg/kg against CCl4 induced hepatotoxicity in rats. However, the dose adjustments may be necessary to optimize the similar hepatoprotective efficacy in clinical settings. [Int J Basic Clin Pharmacol 2015; 4(3.000: 404-409

  7. Wood Anatomical Structure of Morus alba L. and Morus nigra L., Native to Iran

    Directory of Open Access Journals (Sweden)

    Elham KARAMI

    2010-12-01

    Full Text Available Iran is a wast country with many different tree species. Among those there are two species of Morus genus including alba and nigra. Since long time ago, white mulberry�s wood (Morus alba has been used for making musical instruments especially bowl shaped instruments in Iran.. In contrast, black mulberry�s wood (Morus nigra has never been used for these types of applications. In order to investigate the possible replacement choices, this study has been carried out to investigate the anatomical differences and similarities between these two species. Wood samples of the two species have been collected from same site and microsections for light microscopic studies and maceration samples have been prepared. The anatomical characteristics were studied according to the IAWA List of Hardwoods. The most important similarities between them are: vessel solitary in short radial multiples or irregular clusters, fiber nonseptate, rays uniseriate and multiseriate type, paratracheal parenchyma, varying from vasicentric to aliform confluent, apotracheal as marginal bands, Rhombic crystals present in rays and sometimes in parenchyma. The main differences are: semi-ring porous distribution of vessels in M. alba, fewer number of vessels and presence of aliform parenchyma in M. nigra. Taking these results into consideration, the most important features of both species are similar and it could be recommended to use the nigra species as well as the alba for making musical instruments.

  8. CARDIOPROTECTIVE EFFECT OF MORUS ALBA L. LEAVES IN ISOPRENALINE INDUCED RATS

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    S. Madhumitha and A. Indhuleka*

    2012-05-01

    Full Text Available The study was designed to evaluate the cardioprotective effect of methanolic extract of Morus alba L. leaves against isoprenaline- induced myocardial infarction and was investigated by an in vivo method in rats. Male Wistar albino rats were divided into four groups (n=6. Group I rats served as normal control. Group II rats served as isoprenaline induced toxic control (110 mg/kg body weight which was injected intraperitoneally (i.p. for two consecutive days (14th and 15th days. Group III rats were given Morus alba intragastric intubation (500 mg/kg body weight for 15 days. Group IV rats were also given Morus alba as in Group III and additionally isoprenaline was given for two consecutive days (14th and 15th days.The results described the cardioprotective effect that was observed in Group IV which showed a significant (P< 0.05 decreased levels of TBARS and enhanced the activities of both enzymatic and non-enzymatic antioxidants (SOD, CAT, GPx and GSH in myocardial infarcted rats when compared to Groups II and III. In serum, the biomarkers (LDH, CK activities were significantly (P< 0.05 increased in Group II compared to pretreated Group IV. Histopathological studies were also co-relating with the above biochemical parameters. These findings concluded the cardioprotective effect of Morus alba on lipid peroxidation and antioxidant defense system during isoprenaline -induced myocardial infarction in rats.

  9. Una receta de tinta de escritura procedente del Archivo de la Casa de Alba

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    Teresa María Criado Vega

    2015-12-01

    Full Text Available Archive of the house of Alba keeps a file on your prescription black ink mode of metalogalics. Throughout this work, we have studied the materials and processes as well as Castilian been collated with several recipes, and coeval with the same theme, as reflected in various Castilian recipes deposited on different backgrounds.

  10. [Genetic control of Silver fir isozymes (Abies alba Mill.) of the Ukrainian Carpathian Mountains].

    Science.gov (United States)

    Korshikov, I I; Morozova, N N; Pirko, Ia V

    2003-01-01

    Genetic control of GOT, GDH, DIA, MDH, ME, SOD, FDH, ADH, ACP, LAP enzymes has been studied in the seed megagametophytes of Silver fir (Abies alba Mill.) from four natural populations of the Ukrainian Carpathian mountains. The distinct electrophoretic division has been obtained for the 21 loci products. The analysis of allele segregation in the heterozygous trees confirms monogenic inheritance of the revealed variants.

  11. PfAlba1: master regulator of translation in the malaria parasite.

    Science.gov (United States)

    Bunnik, Evelien M; Le Roch, Karine G

    2015-10-08

    During the asexual replication cycle of the malaria parasite Plasmodium falciparum, the RNA-binding protein PfAlba1 binds and stabilizes a subset of transcripts for translation at a later time point.Please see related Research article: http://www.genomebiology.com/2015/16/1/212.

  12. Temporal variability in the Abra alba community determined by global and local events

    NARCIS (Netherlands)

    Van Hoey, V.H.; Vincx, M.; Degraer, S.

    2007-01-01

    Macrobenthic communities in temperate, shallow coastal waters are characterised by strong seasonal and year-to-year variations in community characteristics. These temporal variations were investigated in the Abra alba community on the Belgian Continental Shelf over a period of nine years (1995 – 200

  13. Chemical characterization of Lippia alba essential oil: an alternative to control green molds

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    Jasmina Glamočlija

    2011-12-01

    Full Text Available The essential oil of Lippia alba is reported as an antifungal against human pathogenic microorganisms but few articles report its use as an alternative to synthetic fungicides on green mould control. The objective of this study was to determine chemical characteristics of L. alba essential oil and its antifungal activity against green molds as an alternative to synthetic fungicides. Essential oil was extracted by Clevenger hydrodistillation, characterized by GC-MS analysis, and the structure of the main compounds confirmed by ¹H and 13C-NMR spectroscopy. Microdilution assays evaluated the essential oil minimum inhibitory concentration (MIC and minimum fungicidal concentration (MFC. Commercial fungicides Ketoconazole and Bifonazole were used as control. Essential oil yield is of 0.15% and the major components are neral (33.32% and geranial (50.94%. The L. alba essential oil has MIC of 0.300-1.250 mg/mL and MFC of 0.600-1.250 mg/mL. Ketoconazole and Bifonazole show MIC ranging from 0.025-0.500 to 0.100-0.200 mg/mL, and MFC ranging from 0.250-0.100 to 0.200-0.250 mg/mL, respectively. L. alba essential oil is classified as citral type and the results indicate that it is a potential alternative to synthetic fungicides.

  14. Cytotoxic and Antimicrobial Constituents from the Essential Oil of Lippia alba (Verbenaceae

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    Nara O. dos Santos

    2016-08-01

    Full Text Available Backgroud: Lippia alba (Verbenaceae is a plant widely used in folk medicine to treat various diseases. The present work deals with the chemical composition of the crude essential oil extracted from leaves of L. alba and evaluation of its antimicrobial and cytotoxic activities. Methods: Leaves of L. alba were extracted by hydrodistillation and analyzed by gas chromatography/mass spectrometry (GC/MS as well as by nuclear magnetic resonance (NMR spectroscopy. Cytotoxic and antimicrobial activities of crude essential oil were evaluated in vitro using MTT and broth microdilution assays, respectively. Results: Chemical analysis afforded the identification of 39 substances corresponding to 99.45% of the total oil composition. Concerning the main compounds, monoterpenes nerol/geraniol and citral correspond to approximately 50% of crude oil. The cytotoxic activity of obtained essential oil against several tumor cell lines showed IC50 values ranging from 45 to 64 µg/mL for B16F10Nex2 (murine melanoma and A549 (human lung adenocarcinoma. In the antimicrobial assay, was observed that all tested yeast strains, except C. albicans, were sensitive to crude essential oil. MIC values were two to four-folds lower than those determined to bacterial strains. Conclusion: Analysis of chemical composition of essential oils from leaves of L. alba suggested a new chemotype nerol/geraniol and citral. Based in biological evidences, a possible application for studied oil as an antifungal in medicine, as well as in agriculture, is described.

  15. Alcoholic Extract of Eclipta alba Shows In Vitro Antioxidant and Anticancer Activity without Exhibiting Toxicological Effects

    Science.gov (United States)

    Arya, Rakesh Kumar; Dev, Kapil; Sharma, Chetan; Hossain, Zakir; Meena, Sanjeev; Arya, K. R.; Gayen, J. R.

    2017-01-01

    As per WHO estimates, 80% of people around the world use medicinal plants for the cure and prevention of various diseases including cancer owing to their easy availability and cost effectiveness. Eclipta alba has long been used in Ayurveda to treat liver diseases, eye ailments, and hair related disorders. The promising medicinal value of E. alba prompted us to study the antioxidant, nontoxic, and anticancer potential of its alcoholic extract. In the current study, we evaluated the in vitro cytotoxic and antioxidant effect of the alcoholic extract of Eclipta alba (AEEA) in multiple cancer cell lines along with control. We have also evaluated its effect on different in vivo toxicity parameters. Here, we found that AEEA was found to be most active in most of the cancer cell lines but it significantly induced apoptosis in human breast cancer cell lines by disrupting mitochondrial membrane potential and DNA damage. Moreover, AEEA treatment inhibited migration in both MCF 7 and MDA-MB-231 cells in a dose dependent manner. Further, AEEA possesses robust in vitro antioxidant activity along with high total phenolic and flavonoid contents. In summary, our results indicate that Eclipta alba has enormous potential in complementary and alternative medicine for the treatment of cancer. PMID:28250894

  16. Chemical characterization of Lippia alba essential oil: an alternative to control green molds.

    Science.gov (United States)

    Glamočlija, Jasmina; Soković, Marina; Tešević, Vele; Linde, Giani Andrea; Colauto, Nelson Barros

    2011-10-01

    The essential oil of Lippia alba is reported as an antifungal against human pathogenic microorganisms but few articles report its use as an alternative to synthetic fungicides on green mould control. The objective of this study was to determine chemical characteristics of L. alba essential oil and its antifungal activity against green molds as an alternative to synthetic fungicides. Essential oil was extracted by Clevenger hydrodistillation, characterized by GC-MS analysis, and the structure of the main compounds confirmed by (1)H and (13)C-NMR spectroscopy. Microdilution assays evaluated the essential oil minimum inhibitory concentration (MIC) and minimum fungicidal concentration (MFC). Commercial fungicides Ketoconazole and Bifonazole were used as control. Essential oil yield is of 0.15% and the major components are neral (33.32%) and geranial (50.94%). The L. alba essential oil has MIC of 0.300-1.250 mg/mL and MFC of 0.600-1.250 mg/mL. Ketoconazole and Bifonazole show MIC ranging from 0.025-0.500 to 0.100-0.200 mg/mL, and MFC ranging from 0.250-0.100 to 0.200-0.250 mg/mL, respectively. L. alba essential oil is classified as citral type and the results indicate that it is a potential alternative to synthetic fungicides.

  17. Alba-domain proteins of Trypanosoma brucei are cytoplasmic RNA-binding proteins that interact with the translation machinery.

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    Jan Mani

    Full Text Available Trypanosoma brucei and related pathogens transcribe most genes as polycistronic arrays that are subsequently processed into monocistronic mRNAs. Expression is frequently regulated post-transcriptionally by cis-acting elements in the untranslated regions (UTRs. GPEET and EP procyclins are the major surface proteins of procyclic (insect midgut forms of T. brucei. Three regulatory elements common to the 3' UTRs of both mRNAs regulate mRNA turnover and translation. The glycerol-responsive element (GRE is unique to the GPEET 3' UTR and regulates its expression independently from EP. A synthetic RNA encompassing the GRE showed robust sequence-specific interactions with cytoplasmic proteins in electromobility shift assays. This, combined with column chromatography, led to the identification of 3 Alba-domain proteins. RNAi against Alba3 caused a growth phenotype and reduced the levels of Alba1 and Alba2 proteins, indicative of interactions between family members. Tandem-affinity purification and co-immunoprecipitation verified these interactions and also identified Alba4 in sub-stoichiometric amounts. Alba proteins are cytoplasmic and are recruited to starvation granules together with poly(A RNA. Concomitant depletion of all four Alba proteins by RNAi specifically reduced translation of a reporter transcript flanked by the GPEET 3' UTR. Pulldown of tagged Alba proteins confirmed interactions with poly(A binding proteins, ribosomal protein P0 and, in the case of Alba3, the cap-binding protein eIF4E4. In addition, Alba2 and Alba3 partially cosediment with polyribosomes in sucrose gradients. Alba-domain proteins seem to have exhibited great functional plasticity in the course of evolution. First identified as DNA-binding proteins in Archaea, then in association with nuclear RNase MRP/P in yeast and mammalian cells, they were recently described as components of a translationally silent complex containing stage-regulated mRNAs in Plasmodium. Our results are

  18. ALBA, organisation interaméricaine ou vénézuélienne ?

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    Jean-Jacques Kourliandsky

    2011-01-01

    Full Text Available L’«Alliance Bolivarienne des peuples de notre Amérique», ou ALBA, est de toutes les organisations interaméricaines celle dont l’identité est la plus originale. S’affirmant anti-impérialiste elle donne en effet à l’idéologie une place centrale qui commande la coopération entre ses membres. Mais l’ALBA au quotidien diffère-t-elle d’autres organisations d’intégration ? Le lien entre les différents pays qui la composent n’est-il pas au-delà de l’hommage unanime rendu à Bolivar bien davantage celui de pouvoir bénéficier du pétrole vénézuélien à un prix préférentiel ? L’ALBA, comme d’autres institutions latino-américaines, ne répond-elle pas à l’ambition d’un État, en l’occurrence ici le Venezuela, plus qu’à celle de construire un projet collectif pérenne? Ce lien entre le pétrole de son initiateur vénézuélien et l’ALBA, est une garantie pour le présent. Mais l’ALBA survivrait-elle à une alternance politique au Venezuela, ou à une chute des prix du baril affectant le nerf de l’organisation ?

  19. Enhancement of Shelf Life of Button Mushroom, Agaricus bisporus (Higher Basidiomycetes) by Fumigant Application of Lippia alba Essential Oil.

    Science.gov (United States)

    Vishwakarma, Pratima; Pandey, Abhay K; Mishra, Priyanka; Singh, Pooja; Tripathi, N N

    2015-01-01

    Eleven essential oils isolated from higher plant species were assessed against the four isolates of Verticillium fungicola found on fruiting bodies of Agaricus bisporus. Eucalyptus citriodora and Lippia alba oils were more efficacious and completely inhibited the mycelial growth of fungal isolates. L. alba oil was fungistatic and fungicidal at 10- and 20-µL concentrations against all of the isolates, respectively, and was more potent than E. citriodora oil as well as some prevalent synthetic fungicides such as benomyl, ethylene dibromide, and phosphine. Eighty microliters of L. alba oil protected 500 g of fruiting bodies of A. bisporus for up to 7 d from infection of the fungus under in vivo conditions. The findings strengthen the possibility of L. alba oil as a plant-based protectant to enhance the shelf life of A. bisporus fruiting bodies.

  20. Historia del Derecho: materiales curriculares electrónicos

    OpenAIRE

    Martínez Almira, María Magdalena

    2010-01-01

    El estudio de las fuentes e instituciones de la Historia del Derecho a través de materiales curriculares electrónicos permite al alumno adquirir un conocimiento de la asignatura adaptado al proceso de innovación educativa. Los contenidos de la asignatura, relativos a las instituciones y fuentes medievales, andalusíes, de la España moderna y constitucional, se presentan organizados de forma sistemática y secuencial para justificar el hecho histórico acaecido en un momento concreto y su repercu...

  1. Inhibitory effect of linalool-rich essential oil from Lippia alba on the peptidase and keratinase activities of dermatophytes.

    Science.gov (United States)

    Costa, Danielle Cristina Machado; Vermelho, Alane Beatriz; Almeida, Catia Amancio; de Souza Dias, Edilma Paraguai; Cedrola, Sabrina Martins Lage; Arrigoni-Blank, Maria de Fátima; Blank, Arie Fitzgerald; Alviano, Celuta Sales; Alviano, Daniela Sales

    2014-02-01

    Abstract Lippia alba (Miller) N.E. Brown is an aromatic plant known locally as "Erva-cidreira-do-campo" that has great importance in Brazilian folk medicine. The aim of our study was to evaluate the antidermatophytic potential of linalool-rich essential oil (EO) from L. alba and analyze the ability of this EO to inhibit peptidase and keratinase activities, which are important virulence factors in dermatophytes. The minimum inhibitory concentrations (MICs) of L. alba EO were 39, 156 and 312 µg/mL against Trichophyton rubrum, Epidermophyton floccosum and Microsporum gypseum, respectively. To evaluate the influence of L. alba EO on the proteolytic and keratinolytic activities of these dermatophytes, specific inhibitory assays were performed. The results indicated that linalool-rich EO from L. alba inhibited the activity of proteases and keratinases secreted from dermatophytes, and this inhibition could be a possible mechanism of action against dermatophytes. Due to the effective antidermatophytic activity of L. alba EO, further experiments should be performed to explore the potential of this linalool-rich EO as an alternative antifungal therapy.

  2. LA EVALUACIÓN CURRICULAR COMO BASE PARA EL PERFECCIONAMIENTO CURRICULAR EN LA CARRERA DE ECONOMÍA

    Directory of Open Access Journals (Sweden)

    Robert Alfredo Alfredo Pilozo Cedeño

    2013-07-01

    Full Text Available El economista del Siglo XXI debe ejercer su profesión en un entorno dinámico y complejo, caracterizado por frecuentes cambios políticos, sociales, culturales y laborales. En tales circunstancias, el profesional de las Ciencias Económicas debe  demostrar las competencias adquiridas en su proceso formativo, a través de la aplicación de sus conocimientos para identificar las problemáticas más frecuentes que se revelan en el funcionamiento de los sistemas económicos – financieros y el diseño de alternativas de solución que no contradigan la asignación de recursos en pos del desarrollo humano, a la vez, que estimulen el eficiente desempeño empresarial. Entre las cualidades inherentes a este profesional está la capacidad de anticiparse a las posibles contradicciones económicas y financieras relevantes para una organización en cualquier situación concreta, así como su preparación para presentar y defender las vías que propone, para facilitar su solución con un sólido fundamento de alineación de estas, con las metas organizacionales y la evaluación actual y futura de los posibles resultados en escenarios diversos. Contar con un perfil de egreso, que se articule con la estructuración de la malla curricular, los programas de asignaturas y los requerimientos sociales hacia el economista en el contexto regional, nacional e internacional es una válida intención que justifica el perfeccionamiento curricular en pos de lograr un proceso formativo pertinente, al definir el perfil de competencias específicas, básicas y transversales que caracterizan el desempeño del economista.PALABRAS CLAVE: perfeccionamiento curricular; evaluación; competenciasTHE CURRICULAR EVALUATION AS BASE FOR THE CURRICULAR IMPROVEMENT IN THE CAREER OF ECONOMYABSTRACTThe Economist of the 21st century must exercise their profession in a dynamic and complex environment characterized by frequent changes of political, social, cultural and labor. In such

  3. Presencia del modelo curricular socio-crítico en el diseño del proyecto curricular regional de Puno

    OpenAIRE

    Apaza Llanque, Julia

    2015-01-01

    El Modelo Curricular Socio-Crítico, que concretiza la Teoría Curricular Crítica para la construcción de un currículo que guía la educación desde el interés emancipador, orientó la construcción del Proyecto Curricular Regional de Puno, documento que tras seis años de su aprobación y generalización, aún no es aplicado en el 100% de instituciones educativas de la región. Lo que motivó la formulación del siguiente problema: ¿De qué manera el Modelo Curricular Socio- Crítico está...

  4. Challenges of the e-Health curricular education in bio-medical engineering and in medicine.

    Science.gov (United States)

    Pinciroli, Francesco; Bonacina, Stefano; Marceglia, Sara; Ferrante, Simona; Mazzola, Luca

    2012-01-01

    Curricular recommendations coming from highly respectable associations are highly useful. Nevertheless, they show fatigue in keeping the pace of any fast evolution, as in the ICT happens. So we do the attempt to disclose the emerging challenges affecting e-Health curricular education.

  5. English Learner "Curricular Streams" in Four Middle Schools: Triage in the Trenches

    Science.gov (United States)

    Estrada, Peggy

    2014-01-01

    Little is known about the curricular experiences schools provide English learner students (ELs) to meet the dual goals of attaining English language proficiency (ELP) and grade-level achievement. I introduce the concept of "Curricular Streams" to provide a more nuanced comparative analysis of four urban middle schools, focusing on: (a)…

  6. A Case Study of Relationships between Organizational Culture and Curricular Change in Engineering Education

    Science.gov (United States)

    Merton, Prudence; Froyd, Jeffrey E.; Clark, M. Carolyn; Richardson, Jim

    2009-01-01

    We examined two curricular change efforts at a small, midwestern engineering and science college in order to explore how organizational culture influences curricular change processes. We found that the failure of one effort (measured by inability to sustain the curriculum over time) and the success of the other (the curriculum continues to be…

  7. Exploring Curricular Transformation to Promote Innovation and Entrepreneurship: An Institutional Case Study

    Science.gov (United States)

    McClure, Kevin R.

    2015-01-01

    Colleges and universities in the United States have developed and implemented a wide array of opportunities for undergraduate students to learn about innovation and entrepreneurship. Drawing upon an institutional case study, this article examines why one public research university initiated and supported curricular and co-curricular offerings in…

  8. Extra-Curricular Social Studies in an Open Air History Museum

    Science.gov (United States)

    Morris, Ronald Vaughan

    2008-01-01

    This article discusses extra-curricular social studies in an Open Air History Museum. Open Air History Museum, Conner Prairie Interpretive Park in Fishers, Indiana, is a cultural institution that encourages and supports talented students as they participate in an extra-curricular program. Ten-to sixteen-year-old youths "apply for jobs"…

  9. Educating the educators: a key to curricular integration.

    Science.gov (United States)

    Haramati, Aviad

    2015-02-01

    According to Hopkins and colleagues, integration of basic science and clinical practice in the medical curriculum has been "incremental" at best, rather than transformative, in part because of a lack of focus on the individuals central to the integration--basic science educators. These authors maintain that those who lead change in education should not only address the systemic structure but also understand the meaning of integration for individual basic scientists at different levels of change. Their view has merit, and this Commentary author suggests three concrete steps that institutions should undertake to engage basic scientists who are interested in becoming "educationally literate" and assuming leadership roles in curriculum integration: (1) Offer opportunities to help interested basic science teaching faculty gain the necessary expertise to become skilled educators; (2) establish institutional programs and structures that foster a community of medical educators across departments and schools; and (3) align institutional priorities and incentives to promote, rather than hinder, integration in medical education. In essence, curricular integration cannot succeed if the participants do not understand the "language of education." Furthermore, faculty who opt for an education-focused career path should be brought together from across departments, centers, and schools to create a community of educators within the academic health center. Finally, institutional leaders should place high value and proper incentives in terms of recognition and opportunities for faculty advancement to ensure that those opting to gain additional training as skilled educators will drive innovation and help move curricular reform from incremental change to transformation.

  10. [Study of parental participation in curricular and extracurricular activities].

    Science.gov (United States)

    Renaud, L; Mannoni, C

    1997-01-01

    This preliminary study of parental participation in curricular and extra-curricular activities was conducted in the general framework of the healthy heart project in St. Louis du Parc, an underprivileged and multiethnic neighbourhood in Montreal. A general understanding of this type of participation is essential in order to adapt the role parents play in health programs developed in conjunction with the school. A conceptual framework was developed to help understand how and why parents of primary school children participate in school activities. Qualitative analysis of 15 semi-directed interviews conducted with various schools and other organizations revealed those obstacles to parental involvement, and the factors that encourage parents to participate. It was clear that there were wide social and cultural gaps between parents and schools. An important factor is how people perceive those barriers. Teachers stressed organizational and language communications difficulties. Others pointed to the lack of knowledge of the community, to poor communications skills and the parents' lack of those skills that would allow them to participate actively. A more open-minded attitude by school authorities and a more proactive and positive attitude of teachers toward parents are essential requirements, but not the only ones. Further interviews with parents should help provide more details and information.

  11. Avian pox virus infection in a common barn owl (Tyto alba in southern Brazil

    Directory of Open Access Journals (Sweden)

    Gilberto D. Vargas

    2011-07-01

    Full Text Available A young common barn owl (Tyto alba was referred to the Núcleo de Reabilitação da Fauna Silvestre (Nurfs, Federal University of Pelotas (UFPel, after been found in a barn of a brick factory in the urban area of Pelotas, Rio Grande do Sul, Brazil. The bird was apathic, weak and with crusty lesions in the featherless areas (eyes, beak, legs, and died soon after arrival at Nurfs. Necropsy and histopathological examination of the lesions were carried out. The hyperplasia and hypertrophy of the cutaneous lesions, several eosinophilic intracyto-plasmic inclusion bodies in epithelial cells (Bollinger bodies, as well as particles characteristic of poxvirus, observed by electronic microscopy, confirmed the infection by avian poxvirus, what highlights the importance of Tyto alba as carrier of the virus in the wild.

  12. MAJOR SUMMER-INDUCED THERMAL RISKS IN THE ALBA IULIA – TURDA DEPRESSION

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    CĂTĂLINA MĂRCULEȚ

    2014-05-01

    Full Text Available Major summer-induced thermal risks in the Alba Iulia - Turda Depression. The study deals with warm-season phenomena, featuring positive, sometimes extremely high temperatures that may have a negative influence both on people’s health and economic activities. This category includes tropical waves of heat, absolute maximum temperatures, maximum frequency registered outside the specific interval of summer thermal regime: summer days, as well as tropical days and nights. The paper describes the conditions in which these phenomena occur, average and maximum occurrence rate and evolution trends likely to impair the economy at large, and especially the wide variety of crops covering large surfaceareas in the Alba Iulia - Turda Depression enjoying a Föehn regime.

  13. The bioindicative potential evaluation of Tabebuia alba (Cham. Sandwith, Bignoniaceae, in urban atmospheric pollution

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    César Vinícius Carvalheiro

    2013-08-01

    Full Text Available This study aimed to evaluate the existence of leaf anatomic characteristics in Tabebuia alba changed by air pollutants, which could be used as tool for a bioindication program. The quantification of mutagenic events on pollen grains also were measured. For this, median leaves and pre-anthesis flowers were collected from the adult plants from three places of Curitiba and one place in Araucaria, all nearby to the air monitoring stations. The comparison of the four study sites showed a reduction in leaf area, an increasing of stomatal density, subepidermic layer, epidermis in both faces and the amount of micronucleus. Also, there was reduction of chlorophyllian parenchymas at the site where there was the higher average for the ozone level. It was concluded that these modifications might be a consequence of the effect of troposferic pollution on T. alba plants. However, further studies with this species would be necessary to confirm its potential for bioindication.

  14. Pharmacognostical Standardization of Upodika- Basella alba L.: An Important Ayurvedic Antidiabetic Plant

    Science.gov (United States)

    Shantha, T R; Patchaimal, P; Reddy, M Prathapa; Kumar, R Kishore; Tewari, Devesh; Bharti, Vandana; Venkateshwarlu, G; Mangal, A K; Padhi, M M; Dhiman, K S

    2016-01-01

    Objective: To establish the pharmacognostic standards for the correct identification and standardization of an important Antidiabetic plant described in Ayurveda. Materials and Methods: Standardization was carried out on the leaf and stem of Basella alba L. with the help of the macro-morphological, microscopic, physicochemical and qualitative phytochemical studies. Results: Several specific characters were identified viz. clustered calcium oxalate crystals in the cortex region, absence of trichomes, succulent, thick, mucilaginous, fibrous stem. Rubiaceous type of stomata on both sides of the leaf. Quantitative microscopy along with physicochemical and qualitative phytochemical analysis were also established. Conclusion: The pharmacognostic standards could serve as the reference for the proper identification of the Basella alba L. which is an important anti-diabetic plant described in Ayurveda.

  15. Three New Isoprenylated Flavonoids from the Root Bark of Morus alba

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    Jae-Woo Jung

    2016-08-01

    Full Text Available Phytochemical investigation of the root bark of Morus alba has led to the isolation and identification of three new isoprenylated flavonoids, namely sanggenon U (1, sanggenon V (2, and sanggenon W (3, along with four known isoprenylated flavonoids: euchrenone a7 (4, sanggenon J (5, kuwanon E (6, and kuwanon S (7. All compounds were isolated by repeated silica gel (SiO2, octadecyl SiO2 (ODS, and Sephadex LH-20 open column chromatography. The structure of the compounds were determined based on spectroscopic analyses, including nuclear magnetic resonance (NMR, mass spectrometry (MS, circular dichroism (CD, and infrared (IR. In addition, compounds 1–4 were isolated for the first time from the root bark of M. alba in this study.

  16. HYSTOLOGICAL-FUNCTIONAL SPECIFITY OF NYMPHAEA ALBA L.VEGETATIVE ORGANS

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    Sidorova V. N.

    2012-11-01

    Full Text Available Nymphaea alba L. belongs to aerohydrophytes and has all typical features of such ecological group. We found out the followings anatomic and functional features which are adaptation to the surplus of water: 1 formation of astrosklereid, which are the mechanical fabrics; 2 presence of large intercells which serve as plant fixation; 3 absence of stomas on the lower side of leaf and submarine organs that alterate the interchange of gases. The mycrochemical ash analysis of plant vegetative organs showed the presence of crystals of strontium, sulfur, potassium, ferrum, calcium, sodium, nitrogen, which vary by accumulation, form, and sizes, in vegetative organs (leaf, root and stem. We proved that quantitative, anatomical, and physiological peculiarities of Nymphaea alba L. vegetative organs uncover the mechanism of adaptation of aerohydrophytes to environment factors. The adaptative mechanisms of plant and their functioning are changed under influence of surplus of water.

  17. Therapeutic activity of crude ethanolic extract of Artemisia herba alba against Trypanosoma evansi in rabbits

    Science.gov (United States)

    Awad, Fathy M.; Hasan, Zainal Abidin Abu; Osman, Abdinasir Yusuf; Ibrahim, Nazlina

    2013-11-01

    The present work was conducted to evaluate the antitrypanosomal efficacy of crude ethanolic extract (CEE) of the aerial parts of Artemisia herba alba against Trypanosoma evansi infection in an animal model. The results indicated low levels of parasitaemia in rabbits administered with crude ethanolic extract (CEE) compared to those from the negative control group. Similarly, there was also haematologically significant difference (p<0.05) where low mean levels of packed cell volume (PCV) was observed in Groups 1-4 respectively. In contrast, there was no statistically significant difference in almost all investigated parameters between positive control and treatment groups of animals. In conclusion, both CEE of A. herba-alba and Berenil® showed relatively a parasitaemia and normal haematological values in infected rabbits, thereby confirming their antiparasitic properties.

  18. Antibacterial activity of Phyllantus emblica, Coriandrum sativum, Culinaris medic, Lawsonia alba and Cucumis sativus.

    Science.gov (United States)

    Khan, Dawood Ali; Hassan, Fouzia; Ullah, Hanif; Karim, Sabiha; Baseer, Abdul; Abid, Mobasher Ali; Ubaidi, Muhammad; Khan, Shujaat Ali; Murtaza, Ghulam

    2013-01-01

    Present study deals with the demonstration of the antibacterial activity of very common medicinal plants of Pakistani origin i.e., Phyllantus emblica, Coriandrum sativum, Culinaris medic, Lawsonia alba and Cucumis sativus. The extracts were prepared in crude form by the use of hydro-alcoholic solution and were screened for antibacterial activity against various bacterial species by disk diffusion method. Assay was performed using clinical isolates of B. cereus, S. aureus, P. aeruginosa and E. coli. Crude extract of Phyllantus emblica fruit exhibited strong activity against standard cultures of all studied bacteria. Lawsonia alba showed good activity against standard cultures of all the used microorganisms. Coriandrum sativum was effective only against Bacillus cereus, while Cucumis sativus and Culinaris medic showed poor activity against Pseudomonas aeruginosa only. Hence, Phyllantus emblica exhibited strong antibacterial activity against a wide range of bacteria it means that Phyllantus emblica extract contains some compounds which have broad spectrum of bactericidal activity.

  19. UV-B Induced Changes in the Secondary Metabolites of Morus alba L. Leaves

    OpenAIRE

    Da-Wei Zhang; Jing-Kui Tian; Run-Ze Chen; Lei Cui; Hong-Wei Fu; Lin Zhang; Ming-Yao Sun; Xi-Da Gu

    2010-01-01

    Ultraviolet-B (UV-B) radiation is harmful to plants and human beings. Many secondary metabolites, like flavonoids, alkaloids, and lignin, are UV-B absorbing compounds, which can protect the genetic material of plants. Furthermore, they are active components of herbal drugs. UV-B radiation can activate the self-protective secondary metabolism system. The results of this paper provide a method to induce bioactive secondary metabolites from mulberry leaves (Morus alba L.) by UV-B irradiation in ...

  20. Isoprene and terpenoid emissions from Abies alba: Identification and emission rates under ambient conditions

    Science.gov (United States)

    Pokorska, Olga; Dewulf, Jo; Amelynck, Crist; Schoon, Niels; Šimpraga, Maja; Steppe, Kathy; Van Langenhove, Herman

    2012-11-01

    In this study, biogenic volatile organic compound (BVOC) emissions from Abies alba were studied under ambient conditions in Flanders (Belgium). Emission patterns and rates were investigated from April till November 2010 by using the dynamic branch enclosure technique. The present work revealed that A. alba is an isoprene emitter, with isoprene accounting for 86-93% of total BVOC emissions, except during budburst (67%) in May. The emission spectrum of A. alba consisted of 27 compounds. Next to isoprene, the main emitted compounds were α-pinene, β-pinene, camphene and limonene. BVOC emissions showed a peak in June after development of the young needles, followed by a constant emission during summer months and September and a decrease in October. In all the samples isoprene was the most abundant compound with standardized emission rates between 27 μg g(dw)-1 h-1 in June and 4.6 μg g(dw)-1 h-1 in October, while the total standardized terpenoid emission rates ranged from 2.85 μg g(dw)-1 h-1 in June to 0.26 μg g(dw)-1 h-1 in October. The obtained average β coefficients according to the temperature dependent algorithm of Guenther et al. (1993) during April-June, July, August and September-October were as follows: for terpenoids 0.12 ± 0.03, 0.11 ± 0.05, 0.12 ± 0.04, 0.24 ± 0.01 K-1 and sesquiterpenes (SQTs) 0.09 ± 0.02, 0.11 ± 0.01, 0.10 ± 0.05, 0 K-1, respectively. Overall, isoprene detected in this study was never quantified in previous studies on A. alba and this finding could have a significant impact on the regional BVOCs budget. Therefore, the result of this study is very important for modeling and local air quality.

  1. Female plumage spottiness signals parasite resistance in the barn owl (Tyto alba)

    OpenAIRE

    Roulin, A.; Riols, C; Dijkstra, C; Ducrest, A. L.

    2001-01-01

    The hypothesis that extravagant ornaments signal parasite resistance has received support in several species for ornamented males but more rarely for ornamented females. However, recent theories have proposed that females should often be under sexual selection, and therefore females may signal the heritable capacity to resist parasites. We investigated this hypothesis in the socially monogamous barn owl, Tyto alba, in which females exhibit on average more and larger black spots on the plumage...

  2. Mycocoenology in Abies alba Miller woods of central-southern Tuscany (Italy)

    OpenAIRE

    Angela Laganà; Elena Salerni; Carla Barluzzi; Claudia Perini; Vincenzo de Dominicis

    2014-01-01

    Numerous reports indicate that fir woods in central and northern Europe have recently been damaged by increasing pollution. It has been demonstrated that fungi can be good bioindicators of forest health status. In polluted areas the production of fruit bodies generally declines and the fungal biodiversity, especially of symbiotic species, is reduced. Here we report the results of a survey of the fungal and plant communities in woods of Abies alba Miller in central-southern Tuscany, already st...

  3. El ALBA y los “anti”. Un proyecto de integración alternativo latinoamericano

    OpenAIRE

    Adolfo A. Abadía

    2014-01-01

    Reseña del libro:Bagley, B. M. y Defort M. (Eds.) (2014). ¿La hegemonía norteamericana en declive? El desafío del ALBA y la nueva integración latinoamericana del siglo XXI. ColecciónEl sur es cielo roto. Cali, Colombia: Facultad de Derecho y Ciencias Sociales,Universidad Icesi. 640 pp.

  4. El ALBA y los “anti”. Un proyecto de integración alternativo latinoamericano

    Directory of Open Access Journals (Sweden)

    Adolfo A. Abadía

    2014-12-01

    Full Text Available Reseña del libro:Bagley, B. M. y Defort M. (Eds. (2014. ¿La hegemonía norteamericana en declive? El desafío del ALBA y la nueva integración latinoamericana del siglo XXI. ColecciónEl sur es cielo roto. Cali, Colombia: Facultad de Derecho y Ciencias Sociales,Universidad Icesi. 640 pp.

  5. Fluvial valleys on Alba Patera, Mars, viewed by HRSC/MEx camera

    Science.gov (United States)

    Ansan, V.; Mangold, N.; Masson, P. L.; Neukum, G.

    2009-12-01

    Alba Patera is the northernmost shield volcano of the Tharsis bulge, on which valley networks have been identified in Viking images. Valleys are mainly distributed on the northern side of volcano, with a parallel to dendritic pattern associated with a very high drainage density of 2.3 km-1, comparable to those observed on Hawaiian volcanoes (Gulick and Baker, Nature 341, 1989; and JGR 95, 1990). They are older than sets of normal faults cutting Alba Patera, and dated of the Amazonian Period, but the age of the volcano itself (Late Hesperian-Early Amazonian) implies an age for valleys younger than that of classical valley networks formed during early Mars. These valley networks have been revisited by the HRSC stereo camera enable to generate Digital Elevation Models (DEM) with a spatial gridding of History, their original morphology is partially smoothened by a dust mantle in high resolution images, but this mantling does not seem to have filled these valleys significantly. Images also confirm that valleys located to the north are likely the result of hydrologic erosion in volcanic ash as proposed previously by Gulick and Baker (1990). Previously unrecognized valley networks have been observed on the eastern and southeastern sides of Alba Patera, where volcanic flows are well developed and less blanketed by dust or ash deposits. They are shallower than northern ones, and some prints of seepage at the front of lava flows have been identified indicating that liquid water percolation was an active process in this lithology. In summary, 3D characteristics of valleys on Alba Patera do not suggest a sustained fluvial activity unlike what could be derived by their 2D properties such as the high drainage density. Episodic snowmelt following snow deposition, or eventually episodic rainfall, could be at the origin of these shallow valleys.

  6. Release and dispersal of basidiospores from Amanita muscaria var. alba and their infiltration into a residence.

    Science.gov (United States)

    Li, De-Wei

    2005-11-01

    Release and dispersal of basidiospores of Amanita muscaria var. alba and their potential to infiltrate a nearby residence were investigated. Basidiospore release mainly occurred in the first three days following the expansion of the caps. The concentrations of released basidiospores near basidiomata were 77 137, 75 062, and 41 738 spores m(-3) in the first three days, respectively, with the highest concentration at 281 738 spores m(-3) air. After three days, the concentration dropped by 95%. At the second location, airborne basidiospore concentrations dropped 96-99% after three days with the concentrations of 940, 575, and 1359 spores m(-3) in the first three days, respectively. The diurnal pattern showed a relatively extended night peak. Relative humidity and dew were positively correlated with basidiospore release and short distance dispersal. Rain and rain rate were positively correlated with basidiospore release, but not correlated with short distance dispersal. The basidiospore release period of Amanita muscaria var. alba was short, but within such a period it released a large amount of basidiospores. However, only less than 5% of basidiospores released were dispersed to the second location 5.2 m away and 2.7 m above the basidiomata. Only Amanita muscaria var. alba showed a low potential of infiltrating the residence.

  7. An airborne actinobacteria Nocardiopsis alba isolated from bioaerosol of a mushroom compost facility.

    Science.gov (United States)

    Paściak, Mariola; Pawlik, Krzysztof; Gamian, Andrzej; Szponar, Bogumiła; Skóra, Justyna; Gutarowska, Beata

    2014-01-01

    Actinobacteria are widely distributed in many environments and represent the most important trigger to the occupant respiratory health. Health complaints, including hypersensitivity pneumonitis of the workers, were recorded in a mushroom compost facility (MCF). The studies on the airborne bacteria were carried out to find a possible microbiological source of these symptoms. Culture analysis of compost bioaerosols collected in different location of the MCF was performed. An assessment of the indoor microbial exposure revealed bacterial flora of bioaerosol in the mushroom compost facility represented by Bacillus, Geobacillus, Micrococcus, Pseudomonas, Staphylococcus spp., and actinobacterial strain with white aerial mycelium. The thermotolerant actinobacterial strain of the same morphology was repeatedly isolated from many locations in MCF: air, compost sample, and solid surface in production hall. On the base of complex morphological, chemotaxonomic, and phylogenetic characteristics, the isolate has been classified as Nocardiopsis alba. Dominant position of N. alba in microbial environment of the mushroom compost facility may represent an indicator microorganism in compost bioaerosol. The bioavailability of N. alba in mushroom compost facility creates potential risk for the health of workers, and the protection of respiratory tract and/or skin is strongly recommended.

  8. Odisolane, a Novel Oxolane Derivative, and Antiangiogenic Constituents from the Fruits of Mulberry (Morus alba L.).

    Science.gov (United States)

    Lee, Seoung Rak; Park, Jun Yeon; Yu, Jae Sik; Lee, Sung Ok; Ryu, Ja-Young; Choi, Sang-Zin; Kang, Ki Sung; Yamabe, Noriko; Kim, Ki Hyun

    2016-05-18

    Mulberry, the fruit of Morus alba L., is known as an edible fruit and commonly used in Chinese medicines as a warming agent and as a sedative, tonic, laxative, odontalgic, expectorant, anthelmintic, and emetic. Systemic investigation of the chemical constituents of M. alba fruits led to the identification of a novel oxolane derivative, (R*)-2-((2S*,3R*)-tetrahydro-2-hydroxy-2-methylfuran-3-yl)propanoic acid (1), namely, odisolane, along with five known heterocyclic compounds (2-6). The structure of the new compound was elucidated on the basis of HR-MS, 1D and 2D NMR ((1)H-(1)H COSY, HSQC, HMBC, and NOESY) data analysis. Compound 1 has a novel skeleton that consists of 8 carbon units with an oxolane ring, which until now has never been identified in natural products. The isolated compounds were subjected to several activity tests to verify their biological function. Among them, compounds 1, 3, and 5 significantly inhibited cord formation in HUVECs. The action mechanism of compound 3, which had the strongest antiangiogenic activity, was mediated by decreasing VEGF, p-Akt, and p-ERK protein expression. These results suggest that compounds isolated from M. alba fruits might be beneficial in antiangiogenesis therapy for cancer treatment.

  9. Some coccidial parasites of the lizard Amphisbaena alba (Reptilia: Amphisbaenia: Amphisbaenidae

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    Ralph Lainson

    2003-10-01

    Full Text Available Five parasites are described in the lizard Amphisbaena alba (Amphisbaenidae from the state of Pará, North Brazil. Mature oocysts of Choleoeimeria amphisbaenae n. sp., are passed already mature in the faeces. They are ellipsoidal-cylindrical, average 33.7 x 22.8 µm and are devoid of micropyle, oocyst residuum or polar body. The colourless wall is smooth and of 2 layers. The 4 dizoic sporocysts have no Stieda body and average 13 x 9.3 µm. Endogenous stages develop in the epithelial cells of the gall-bladder in the manner described for the genus and may cause extensive tissue damage. Sporulation of Isospora capanemaensis n. sp., is completed 3 days after the oocysts are voided in the faeces. They average 14.8 x 14.5 µm and have no micropyle, oocyst residuum or polar body. The 2 tetrazoic sporocysts are pear-shaped, average 8.6 x 6.6 and have an inconspicuous Stieda body. Endogenous development is in the epithelial cells of the ileum, and heavy infections cause considerable tissue destruction. Multisporocystic oocysts passed in the faeces of one A. alba possibly originated from an invertebrate host ingested by the lizard. A globidium-like cyst in the digestive tract of A. alba measured 105 x 85 µm and contained many hundreds of merozoites. A stained kidney smear of the same lizard revealed the presence of an unidentified parasite producing multinucleate cyst-like stages.

  10. ANTI-DIABETIC EFFECT OF MORUS ALBA ON RABBIT AS ANIMAL MODEL

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    Laddha G. P.

    2012-04-01

    Full Text Available A study of ancient literature indicates that diabetes was fairly well known and well conceived as an entity in India. The nature has provided abundant plant wealth for all the living creatures, which possess medicinal virtues. Therefore, there is a necessity to explore their uses and to conduct Pharmacognostic and pharmacological studies to ascertain their therapeutic properties. In fact, nowadays diabetes is a global problem. Hence, the present study aims to open new avenues for the improvement of medicinal uses of Morus alba. for the area for diabetes. Another important objective of such study is to bring the anti-diabetic medicinal plants sector on a firm scientific footing, raise awareness and add value to the resource. Dried petroleum ether (60-80°C extracts of leaves of Morus alba. were subjected for hypoglycemic activity in New Zealand rabbits (1.5-3.5 kg. Blood sugar level was determined using digital glucometer. The oral administration of leaf extracts at doses of 200 mg/ kg− lead to a significant blood glucose reduction. This laid the foundation to study the active compounds of such anti-diabetic plants that are responsible for the hypoglycemic activities. It also proves the traditional claim of Kachh region with regard to Morus Alba for its anti-diabetic activity.

  11. HPLC profiles and biomarker contents of Australian-grown Salvia miltiorrhiza f. alba roots.

    Science.gov (United States)

    Li, Chun Guang; Sheng, Shu Jun; Pang, Edwin C K; May, Brian; Xue, Charlie Chang Li

    2009-07-01

    Salvia miltiorrhiza f. alba (Baihua Danshen) is a Chinese medicinal herb commonly used for treating cardiovascular disease. It has been grown in Australia, although the quality of its main medicinal part (dried root) has not been assessed. In this study, we investigated HPLC profiles and biomarker contents of Australian-grown S. miltiorrhiza f. alba roots. Patterns of HPLC profiles were established in MeOH, and aqueous extracts in terms of number of common characteristic peaks and their relative retention times. The contents of three tanshinone biomarkers (cryptotanshinone (3), tanshinone I (1), and tanshinone IIA (2)) were significantly higher (pplants than those of two-year-old plants. In contrast, salvianolic acid B (4) content was significantly higher in the roots of two-year-old plants than in those of one-year-old plants. The findings suggest that the biomarker contents in Australian-grown S. miltiorrhiza f. alba roots vary with the growth periods of the plants, which may be important in determining the optimal harvest time for the plant roots with targeted levels of tanshinones and salvianolic acid B (4).

  12. WINE ROAD - AN INSTRUMENT FOR THE VALORISATION OF WINE TOURISM POTENTIAL CASE STUDY: ALBA COUNTY VINEYARDS

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    UNGUREANU Mihaela

    2015-12-01

    Full Text Available The main aim of this study is to highlight the wine-growing and wine-making potential of Alba County and the way it can be valorised. Alba county has a rich winegrowing and wine-making heritage, a fact which is due to the long-standing tradition of winegrowing on these area, as well as to the characteristics of the natural factors (relief, geology, climate, soil, favourable for obtaining high-quality wines, the reputation of which has been acquired at national and international competitions. In order to render useful the wine tourism resources, the development of a specific infrastructure is needed, as well as the creation of complex tourist products, able to satisfy a wide range of tourist motivations. An efficient instrument to make productive the wine potential of a region is the „Wine Road" – a tourist trail which includes the tourist attractions of a delimited area, usually with a controlled designation of origin, and also a diverse range of tourist services (transportation, accommodation, catering leisure etc.. In Alba County, the „Wine Road" can be considered as a tourist attraction in itself, but also a means of harnessing the rich cultural-historical and natural heritage and, implicitly, the wine-growing and wine-making heritage.

  13. Composition, anti-quorum sensing and antimicrobial activity of essential oils from Lippia alba

    Directory of Open Access Journals (Sweden)

    Jesus Olivero-Verbel

    2014-09-01

    Full Text Available Many Gram-negative pathogens have the ability to produce N-acylhomoserine lactones (AHLs as signal molecules for quorum sensing (QS. This cell-cell communication system allows them to coordinate gene expression and regulate virulence. Strategies to inhibit QS are promising for the control of infectious diseases or antibiotic resistant bacterial pathogens. The aim of the present study was to evaluate the anti-quorum sensing (anti-QS and antibacterial potential of five essential oils isolated from Lippia alba on the Tn-5 mutant of Chromobacterium violaceum CV026, and on the growth of the gram-positive bacteria S. aureus ATCC 25923. The anti-QS activity was detected through the inhibition of the QS-controlled violacein pigment production by the sensor bacteria. Results showed that two essential oils from L. alba, one containing the greatest geranial:neral and the other the highest limonene:carvone concentrations, were the most effective QS inhibitors. Both oils also had small effects on cell growth. Moreover, the geranial/neral chemotype oil also produced the maximum zone of growth inhibition against S. aureus ATCC 25923. These data suggest essential oils from L. alba have promising properties as QS modulators, and present antibacterial activity on S. aureus.

  14. Analysis of synonymous codon usage in chloroplast genome of Populus alba

    Institute of Scientific and Technical Information of China (English)

    ZHOU Meng; LONG Wei; LI Xia

    2008-01-01

    The pattern of codon usage in the chloroplast genome of Populus alba was investigated.Correspondence analysis (a commonly used multivariate statistical approach) and method of effective number of codons (ENc)-plot were conducted to analyze synonymous codon usage.The results of correspondence analysis showed that the distribution of genes on the major axis was significantly correlated with the frequency of use of G+C in synonymously variable third position of sense codon (GC3S),(r=0.349),and the positions of genes on the axis 2 and axis 3 were significantly correlated with CAI (r=-0.348,p<0.01 and r=0.602,p<0.01).The ENc for most genes was similar to that for the expected ENc based on the GC3S,but several genes with low ENC values were lying below the expected curve.All of these data indicated that codon usage was dominated by a mutational bias in chloroplast genome of P.alba.The selection in nature for translational efficiency only played a minor role in shaping codon usage in the chloroplast genome of P.alba.

  15. Improved Chemotherapeutic Activity by Morus alba Fruits through Immune Response of Toll-Like Receptor 4

    Directory of Open Access Journals (Sweden)

    Bo Yoon Chang

    2015-10-01

    Full Text Available Morus alba L. fruits have long been used in traditional medicine by many cultures. Their medicinal attributes include cardiovascular, hepatoprotective, neuroprotective and immunomodulatory actions. However, their mechanism of macrophage activation and anti-cancer effects remain unclear. The present study investigated the molecular mechanisms of immune stimulation and improved chemotherapeutic effect of M. alba L. fruit extract (MFE. MFE stimulated the production of cytokines, nitric oxide (NO and tumor necrosis factor-α (TNF-α and tumoricidal properties of macrophages. MFE activated macrophages through the mitogen-activated protein kinase (MAPKinase and nuclear factor-κB (NF-κB signaling pathways downstream from toll-like receptor (TLR 4. MFE was shown to exhibit cytotoxicity of CT26 cells via the activated macrophages, even though MFE did not directly affect CT26 cells. In a xenograft mouse model, MFE significantly enhanced anti-cancer activity combined with 5-fluorouracil and markedly promoted splenocyte proliferation, natural killer (NK cell activity, cytotoxic T lymphocyte (CTL activity and IFN-γ production. Immunoglobulin G (IgG antibody levels were significantly increased. These results indicate the indirect anti-cancer activity of MFE through improved immune response mediated by TLR4 signaling. M. alba L. fruit extract might be a potential anti-tumor immunomodulatory candidate chemotherapy agent.

  16. Improved Chemotherapeutic Activity by Morus alba Fruits through Immune Response of Toll-Like Receptor 4.

    Science.gov (United States)

    Chang, Bo Yoon; Kim, Seon Beom; Lee, Mi Kyeong; Park, Hyun; Kim, Sung Yeon

    2015-10-13

    Morus alba L. fruits have long been used in traditional medicine by many cultures. Their medicinal attributes include cardiovascular, hepatoprotective, neuroprotective and immunomodulatory actions. However, their mechanism of macrophage activation and anti-cancer effects remain unclear. The present study investigated the molecular mechanisms of immune stimulation and improved chemotherapeutic effect of M. alba L. fruit extract (MFE). MFE stimulated the production of cytokines, nitric oxide (NO) and tumor necrosis factor-α (TNF-α) and tumoricidal properties of macrophages. MFE activated macrophages through the mitogen-activated protein kinase (MAPKinase) and nuclear factor-κB (NF-κB) signaling pathways downstream from toll-like receptor (TLR) 4. MFE was shown to exhibit cytotoxicity of CT26 cells via the activated macrophages, even though MFE did not directly affect CT26 cells. In a xenograft mouse model, MFE significantly enhanced anti-cancer activity combined with 5-fluorouracil and markedly promoted splenocyte proliferation, natural killer (NK) cell activity, cytotoxic T lymphocyte (CTL) activity and IFN-γ production. Immunoglobulin G (IgG) antibody levels were significantly increased. These results indicate the indirect anti-cancer activity of MFE through improved immune response mediated by TLR4 signaling. M. alba L. fruit extract might be a potential anti-tumor immunomodulatory candidate chemotherapy agent.

  17. Insecticidal activity of powder and essential oil of Cryptocarya alba (Molina Looser against Sitophilus zeamais Motschulsky

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    Juan J Pinto

    2016-03-01

    Full Text Available Cereals constitute a relevant part of human and domestic animal diet. Under storage conditions, one of the most significant problems of these crops is insect pests as the maize weevil (Sitophilus zeamais Motschulsky. This insect species is usually controlled by means of synthetic insecticides but problems as toxic residues and resistance has led to the search for more friendly control alternatives such as botanical insecticides. The aim of this research was to evaluate, under laboratory conditions, the insecticidal properties of the powder and the essential oil of peumo (Cryptocarya alba [Molina] Looser; Lauraceae leaves against S. zeamais. The variables assessed were toxicity by contact and fumigant activity, adult emergence (F1, repellent effect, and impact on wheat (Triticum aestivum L. seed germination. A completely randomized design was used with five treatments and 10 replicates. The higher mortality levels were obtained at 80 g powder kg-1 grain and 40 mL essential oil kg-1 grain of C. alba; in both cases, the mortality of adult S. zeamais surpassed 80%. The emergence of adults S. zeamais (F1 was reduced by 100% at 80 g powder kg-1 grain and 40 mL essential oil kg-1 grain. Germination of wheat seeds treated with C. alba powder and essential oil was not affected. Both, the powder and the oil treatments showed repellent effect, but not fumigant activity.

  18. The biology of flowering and structure of selected elements of Cornus alba L. flowers

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    Agata Konarska

    2012-12-01

    Full Text Available The biology of flowering and the micromorphology of Cornus alba flowers were studied using light and scanning electron microscopy. The flowering of white dogwood in 2008 lasted 35 days, and the lifespan of a single flower was 3 days. The number of flowers per inflorescence was variable (on the average, it was 89. The largest group of insects visiting the flowers of C. alba comprised Hymenoptera (mainly bees and andrenids, then ants, dipterans and beetles. They foraged the dogwood flowers most intensively between 11.00 and 15.00. The inconspicuous four-petalled flowers of C. alba were characterised by the occurrence of T-shaped, two-armed non-glandular trichomes covering the receptacle as well as observed on the petals of the corolla, the style of the pistil and the anthers in a smaller number. The trichomes were covered by a thick cuticle with characteristic outgrowths. They contained a living protoplast, and plastids were observed in the cytoplasm of the trichome cells. In addition, anomocytic stomata were found in the epidermis of the receptacle and in the epidermis of the corolla petals. The stigma of the pistil and the adaxial epidermis of the petals were composed of very numerous conical papillae.

  19. Characterization of a New Flavone and Tyrosinase Inhibition Constituents from the Twigs of Morus alba L.

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    Long Zhang

    2016-09-01

    Full Text Available The twigs of Morus alba L. were found to show strong tyrosinase inhibition activity, and the responsible active components in the extract were further investigated in this study. A flavone, named morusone (1, and sixteen known compounds 2–17 were isolated from M. alba twigs and their structures were identified by interpretation of the corresponding ESI-MS and NMR spectral data. In the tyrosinase inhibitory test, the compounds steppogenin (IC50 0.98 ± 0.01 µM, 2,4,2′,4′-tetrahydroxychalcone (IC50 0.07 ± 0.02 µM, morachalcone A (IC50 0.08 ± 0.02 µM, oxyresveratrol (IC50 0.10 ± 0.01 µM, and moracin M (8.00 ± 0.22 µM exhibited significant tyrosinase inhibition activities, much stronger than that of the positive control kojic acid. These results suggest that M. alba twig extract should served as a good source of natural tyrosinase inhibitors for use in foods as antibrowning agents or in cosmetics as skin-whitening agents.

  20. Composition, anti-quorum sensing and antimicrobial activity of essential oils from Lippia alba.

    Science.gov (United States)

    Olivero-Verbel, Jesus; Barreto-Maya, Ana; Bertel-Sevilla, Angela; Stashenko, Elena E

    2014-01-01

    Many Gram-negative pathogens have the ability to produce N-acylhomoserine lactones (AHLs) as signal molecules for quorum sensing (QS). This cell-cell communication system allows them to coordinate gene expression and regulate virulence. Strategies to inhibit QS are promising for the control of infectious diseases or antibiotic resistant bacterial pathogens. The aim of the present study was to evaluate the anti-quorum sensing (anti-QS) and antibacterial potential of five essential oils isolated from Lippia alba on the Tn-5 mutant of Chromobacterium violaceum CV026, and on the growth of the gram-positive bacteria S. aureus ATCC 25923. The anti-QS activity was detected through the inhibition of the QS-controlled violacein pigment production by the sensor bacteria. Results showed that two essential oils from L. alba, one containing the greatest geranial:neral and the other the highest limonene:carvone concentrations, were the most effective QS inhibitors. Both oils also had small effects on cell growth. Moreover, the geranial/neral chemotype oil also produced the maximum zone of growth inhibition against S. aureus ATCC 25923. These data suggest essential oils from L. alba have promising properties as QS modulators, and present antibacterial activity on S. aureus.

  1. Découvertes archéologiques à Alba Iulia et une conversion des Hongrois

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    Răzvan Theodorescu

    2014-12-01

    Full Text Available Superposés par l’autel de la basilique romane St Michel de Alba Iulia,les restes d’un baptistère circulaire,daté au Xe siècle, témoignent d’une technique de construction fréquente dans l’espace byzantin. Une chronique byzantine (Cedrenos-Skylitzes fait mention du baptême à Constantinople, vers le milieu du même siècle, d’un chef hongrois, Gyula «archonte des Turcs» qui retourna dans ses terres accompagné par un «évêque de la Turquie», Hiérothée. On sait que, pour les Byzantins de cette époque-là, les Magyars étaient des Turcs et que la Turquie représentait le Sud de la Hongrie et la zone transylvaine. Il est donc évident que la résidence de Gyula ne saurait être autre que «Alba de Gyula», donc, Alba Iulia, jusqu’où il était arrivée la première vague de pénétration hongroise, suivant la rivière Mureş, en quête de salines. Dès 1977, ai-je déjà avancé l’hypothèse d’une première christianisation des Hongrois, faite à Alba Iulia vers 950, sous le signe de Byzance, une bonne moitié de siècle avant que le petit-fils de Gyula, le roi Etienne I de Hongrie, n’en dirige une nouvelle, faite cette fois sous le signe de Rome. De nouvelles découvertes à Alba Iulia ont mis en évidence une église de type «croix grecque inscrite», datée toujours au Xe siècle, ce qui nous permet d’affirmer que, de par l’évêque grec, le sanctuaire cruciforme et le baptistère circulaire, on peut parler d’un horizon de vie byzantine en Transylvanie, avant l’année 1000.

  2. Using online program development to foster curricular change and innovation.

    Science.gov (United States)

    Gwozdek, Anne E; Springfield, Emily C; Peet, Melissa R; Kerschbaum, Wendy E

    2011-03-01

    Distance education offers an opportunity to catalyze sweeping curricular change. Faculty members of the University of Michigan Dental Hygiene Program spent eighteen months researching best practices, planning outcomes and courses, and implementing an e-learning (online) dental hygiene degree completion program. The result is a collaborative and portfolio-integrated program that focuses on the development of reflective practitioners and leaders in the profession. A team-based, systems-oriented model for production, implementation, and evaluation has been critical to the program's success. The models and best practices on which this program was founded are described. Also provided is a framework of strategies for development, including the utilization of backward course design, which can be used in many areas of professional education.

  3. METHODOLOGY FOR CROSS-CURRICULAR THEME OF THE ENVIRONMENTAL AXIS

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    José Luis Aparicio López

    2015-04-01

    Full Text Available This article introduces a methodology to identify the presence of the environmental axis in educational programs in Bachelors in the Universidad Autónoma de Guerrero, Mexico. It is sustained on competency-based education and constructionism, due to they appeal to humanism to deal current problems. It is composed of four phases: committee conformation, theoretical and conceptual concerning analysis, construction and application of instruments on a PE, and identification of the cross-curricular theme level. Even though the proposed methodology is applied to the environment, it is feasible to adapt to other axes, such as human rights, multiculturalism, and poverty, relevant to the educational context of the state of Guerrero.

  4. A New Approach to Authoring Interactive Curricular Material

    Science.gov (United States)

    Christian, Wolfgang

    2001-10-01

    It is still not common to find computer-based interactive material incorporated into mainstream teaching. Learning the intricacies of a software package is a poor investment of time if the half-life of the textbook is longer than the half-life of the computer technology. Internet technologies are likely to change this situation. This talk describes a set of Java applets, known as Physlets, which make use of these technologies. Physlets are designed to communicate with browsers by employing a scripting language such as JavaScript, thereby allowing one applet to be used in many different contexts. This approach makes it possible to use a modular object-oriented approach for the design of material. But this is not enough. Effective curriculum development must couple our software design philosophy with research into the effectiveness of computer-based instruction. Examples of Physlet-based curricular material will be presented.

  5. HISTÓRICO DA PROPOSTA CURRICULAR DE SANTA CATARINA

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    Ivonete Benedet Fernandes Coan

    2015-12-01

    Full Text Available Este texto faz parte da dissertação de mestrado em andamento que tem como objetivo principal analisar os textos sobre alfabetização com letramento contidos na Proposta Curricular de Santa Catarina, no sentido de identificar conceitos e encaminhamentos efetuados pelo Estado catarinense aos professores da rede estadual de ensino por meio dessa política pública. A pesquisa orienta-se na concepção histórico-crítica e adota como método a análise documental e a pesquisa bibliográfica com revisão de literatura sobre as categorias pesquisadas. As respostas ao problema de pesquisa identificaram, precariedade na formação de professores; complexidade dos textos que compõem a Proposta e influência do sistema neoliberal sobre as políticas públicas educacionais brasileiras como fatores que concorrem para a permanência de índices de analfabetismo, repetência e evasão escolar no Estado de Santa Catarina. A elaboração do componente curricular catarinense teve início no final dos anos 1980 e a última atualização foi editada em 2005. Neste artigo, escreve-se o processo de construção dessa Proposta a partir do Plano de Ação 88/91 até os Cadernos Temáticos publicados em 2005.

  6. Developing global leaders through doctoral education El desarrollo de liderazgos globales mediante la educación de doctorado O desenvolvimento de lideranças globais através da educação de doutorado

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    Ginette Lemire Rodger

    2004-10-01

    Full Text Available Nursing leadership has become a major theme of discussions in many countries. The phenomenon is also present in nursing as the profession is redesigning and reinventing itself in all domains of practice. This paper discusses the development of global nursing leaders through doctoral education in the context of 21st century realities. Next, two meanings of global leadership of nursing are reviewed. Finally, doctoral education is focused by looking at worldviews and the challenges ahead in preparing global nursing leaders for the 21st century.El liderazgo en enfermería se ha vuelto un importante tema de discusión en muchos países. El fenómeno también está presente en la enfermería, ya que la profesión está redibujándose y reinventándose en todas las áreas de la práctica. Este artículo discute el desarrollo de liderazgos globales en enfermería mediante la educación de doctorado en el contexto de las realidades del siglo 21º. Enseguida son revisados dos significados del liderazgo global en enfermería. Finalmente se destaca la educación de doctorado al analizar las perspectivas del mondo y los desafíos que debemos afrontar en la preparación de liderazgos en enfermería para el siglo 21º.A liderança em enfermagem tornou-se um importante tema de discussão em muitos países. O fenômeno também se manifesta na enfermagem enquanto a profissão está se redesenhando e reinventando em todas as áreas da prática. Este artigo discute o desenvolvimento de lideranças globais em enfermagem através da educação de doutorado no contexto das realidades do século 21. A seguir, são revisados dois significados de liderança global em enfermagem. Finalmente, destaca-se a educação de doutorado ao analisar as perspectivas do mundo e os desafios a serem enfrentados na preparação de lideranças globais de enfermagem para o século 21.

  7. Ameliorative effect of Morus alba leaves extract against developmental retinopathy in pups of diabetic and aluminum intoxicated pregnant albino rats

    Institute of Scientific and Technical Information of China (English)

    Hassan; El-Sayyed; Gamal; Badawy; Sobhy; Hassab; Elnabi; Ibrahim; El-Elaimy; Eman; Al; Shehari

    2015-01-01

    Objective: To investigate the possible ameliorative effect of crude water extract of Morus alba(M. alba) leaves on retinopathy of rat pups maternally subjected to diabetes and/or Al intoxication.Methods: Both control and experimental groups were subjected to certain integrated approaches, namely, biochemical assessments, light microscopic investigation, transmission electron microscopic investigation, single cell gel electrophoresis(comet assay) and determination of DNA fragmentation.Results: The retina of pups of diabetic and/or Al-intoxicated mothers exhibited abnormal alterations in retinal cell layers including retinal pigmented epithelium, photoreceptor inner segment and ganglion cells. Increased incidence of DNA fragmentation and apoptosis were evident in pups of diabetic and/or Al-intoxicated mothers. However, retina of pups maternally received M. alba extract plus diabetes or Al-intoxicated alone or in combination showed marked amelioration. Less degree of ameliorations was seen in retina of pups maternally subjected to combined treatment. Furthermore, application of crude water extract of M.alba resulted in amelioration of the alterations of maternal serum glucose as well as Al concentration.Conclusions: Based on the results of the present study, M. alba extract is effective against experimentally diabetic and Al-induced developmental retinopathy.

  8. Quimiotipos, Extracción, Composición y Aplicaciones del Aceite Esencial de Lippia alba

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    G.A. LINDE

    2016-03-01

    Full Text Available RESUMO Lippia alba é uma planta amplamente distribuída nas zonas tropicais, subtropicais e temperadas das Américas, África e Ásia. O óleo essencial de L. alba tem sido amplamente estudado, entretanto apresenta variações de produção. Portanto este estudo teve como objetivo realizar uma revisão dos principais quimiotipos, métodos de extração, composição e aplicação do óleo essencial de L. alba. Neste estudo são discutidos os principais quimiotipos e sua relação com fatores genéticos e características morfológicas. Também são discutidos os fatores que afetam o rendimento de produção, composição química, métodos de extração e do uso e da atividade biológica do óleo essencial de L. alba. Apesar da vasta literatura sobre os óleos essenciais de L. alba, ainda desenvolvimento de aplicações para a produção de cosméticos, fármacos e alimentos, bem como faltam definições agronomicas sobre o cultivo e melhoramento desta planta.

  9. The essential oil from Lippia alba induces biochemical stress in the silver catfish (Rhamdia quelen after transportation

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    Joseânia Salbego

    Full Text Available This study investigated the effects of the essential oil (EO from Lippia alba on biochemical parameters related to oxidative stress in the brain and liver of silver catfish (Rhamdia quelen after six hours of transport. Fish were transported in plastic bags and divided into three treatments groups: control, 30 µL L- 1 EO from L.alba and 40 µL L-1 EO from L.alba. Prior to transport, the fish were treated with the EO from L. alba (200 µL L -1 for three minutes, except for the control group. Fish transported in bags containing the EO did not have any alterations in acetylcholinesterase, ecto -nucleoside triphosphate diphosphohydrolase and 5'nucleotidase activity in the brain or superoxide dismutase activity in the liver. The hepatic catalase (CAT, glutathione-S-transferase (GST, glutathione peroxidase (GPx, nonprotein thiol and ascorbic acid levels were significantly lower compared to the control group. However, the hepatic thiobarbituric acid- reactive substances, protein oxidation levels and the lipid peroxidation/catalase+glutathione peroxidase (LPO/CAT+GPx ratio were significantly higher in fish transported with both concentrations of the EO, indicating oxidative stress in the liver. In conclusion, considering the hepatic oxidative stress parameters analyzed in the present experiment, the transport of previously sedated silver catfish in water containing 30 or 40 µL L-1 of EO from L. alba is less effective than the use of lower concentrations.

  10. Mosquito larvicidal and ovicidal properties of Eclipta alba (L.) Hassk (Asteraceae) against chikungunya vector, Aedes aegypti (Linn.) (Diptera:Culicidae)

    Institute of Scientific and Technical Information of China (English)

    M Govindarajan; P Karuppannan

    2011-01-01

    Objective: The present study deals with the investigation of larvicidal and ovicidal activities of benzene, hexane, ethyl acetate, methanol and chloroform leaf extract of Eclipta alba (E. alba) against dengue vector, Aedes aegypti (Ae. Aegypti). Methods: Twenty five early III instar larvae of Ae. aegypti was exposed to various concentrations (50-300 ppm) and was assayed in the laboratory by using the protocol of WHO 2005; the 24 h LC50 values of the E. alba leaf extract was determined by Probit analysis. For ovicidal activity, slightly modified method of Su and Mulla was performed. The ovicidal activity was determined against Ae. aegypti to various concentrations ranging from 100-350 ppm under the laboratory conditions. The egg hatch rates were assessed 48 h post treatment. Results: The LC50 values of benzene, hexane, ethyl acetate, methanol and chloroform extract of E. alba against early third instar larvae of Ae. aegypti were 151.38, 165.10, 154.88, 127.64 and 146.28 ppm, respectively. Maximum larvicidal activity was observed in the methanol extract followed by chloroform, benzene, ethyl acetate and hexane extract. No mortality was observed in control. Among five solvent tested the methanol extract was found to be most effective for ovicidal activity against Ae. aegypti. The methanol extracts exerted 100% mortality (zero hatchability) at 300 ppm. Conclusions: From the results it can be concluded the crude extract of E. alba was an excellent potential for controlling Ae. aegypti mosquito.

  11. Asteraceae Artemisia campestris and Artemisia herba-alba Essential Oils Trigger Apoptosis and Cell Cycle Arrest in Leishmania infantum Promastigotes

    Science.gov (United States)

    Messaoud, Chokri; Haoues, Meriam; Neffati, Noura; Bassoumi Jamoussi, Imen; Essafi-Benkhadir, Khadija; Boussaid, Mohamed; Karoui, Habib

    2016-01-01

    We report the chemical composition and anti-Leishmania and antioxidant activity of Artemisia campestris L. and Artemisia herba-alba Asso. essential oils (EOs). Our results showed that these extracts exhibit different antioxidant activities according to the used assay. The radical scavenging effects determined by DPPH assay were of IC50 = 3.3 mg/mL and IC50 = 9.1 mg/mL for Artemisia campestris and Artemisia herba-alba essential oils, respectively. However, antioxidant effects of both essential oils, determined by ferric-reducing antioxidant power (FRAP) assay, were in the same range (2.3 and 2.97 mg eq EDTA/g EO, resp.), while the Artemisia herba-alba essential oil showed highest chelating activity of Fe2+ ions (27.48 mM Fe2+). Interestingly, we showed that both EOs possess dose-dependent activity against Leishmania infantum promastigotes with IC50 values of 68 μg/mL and 44 μg/mL for A. herba-alba and A. campestris, respectively. We reported, for the first time, that antileishmanial activity of both EOs was mediated by cell apoptosis induction and cell cycle arrest at the sub-G0/G1 phase. All our results showed that EOs from A. herba-alba and A. campestris plants are promising candidates as anti-Leishmania medicinal products. PMID:27807464

  12. Asteraceae Artemisia campestris and Artemisia herba-alba Essential Oils Trigger Apoptosis and Cell Cycle Arrest in Leishmania infantum Promastigotes

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    Zohra Aloui

    2016-01-01

    Full Text Available We report the chemical composition and anti-Leishmania and antioxidant activity of Artemisia campestris L. and Artemisia herba-alba Asso. essential oils (EOs. Our results showed that these extracts exhibit different antioxidant activities according to the used assay. The radical scavenging effects determined by DPPH assay were of IC50 = 3.3 mg/mL and IC50 = 9.1 mg/mL for Artemisia campestris and Artemisia herba-alba essential oils, respectively. However, antioxidant effects of both essential oils, determined by ferric-reducing antioxidant power (FRAP assay, were in the same range (2.3 and 2.97 mg eq EDTA/g EO, resp., while the Artemisia herba-alba essential oil showed highest chelating activity of Fe2+ ions (27.48 mM Fe2+. Interestingly, we showed that both EOs possess dose-dependent activity against Leishmania infantum promastigotes with IC50 values of 68 μg/mL and 44 μg/mL for A. herba-alba and A. campestris, respectively. We reported, for the first time, that antileishmanial activity of both EOs was mediated by cell apoptosis induction and cell cycle arrest at the sub-G0/G1 phase. All our results showed that EOs from A. herba-alba and A. campestris plants are promising candidates as anti-Leishmania medicinal products.

  13. Chemical variability of essential oils of Lippia alba (Miller) N. E. Brown growing in Costa Rica and Argentina.

    Science.gov (United States)

    Ricciardi, Gabriela; Cicció, José F; Ocampo, Rafael; Lorenzo, Daniel; Ricciardi, Armando; Bandoni, Arnaldo; Dellacassa, Eduardo

    2009-06-01

    Lippia alba (Verbenaceae) is a shrub whose essential oil has important biological, pharmacological, and aromatizing properties. The species has a natural range from Central America to Argentina, being cultivated for its commercial value in Brazil, Argentina and Guatemala, and has been introduced into India and Spain. To reach the economic potential of the plant, the present study was aimed at evaluating L. alba for different chemotypes. The composition of the essential oil from two native populations of L. alba, collected from Argentina and two accessions from Costa Rica, were screened by GC and GC-MS. The results obtained led us to adopt the concept of a biodistribution map, as was proposed previously for the species, representing an approach to the natural biological distribution of the species in America based on the chemotypes described and their geographical distribution. Moreover, the biodiversity reported for the species (seven of eight chemotypes described for L. alba are present in Argentina) suggests the southern region of South America as the centre of distribution for L. alba.

  14. Sistema reprodutivo do Ipê-Branco: Tabebuia roseo-alba (Ridley Sandwith (Bignoniaceae Breeding system of the White Trumpet Tree: Tabebuia roseo-alba (Ridley Sandwith (Bignoniaceae

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    Gabriel Gandolphi

    2010-09-01

    Full Text Available Estudos sobre sistemas reprodutivos têm indicado o predomínio da autoincompatibilidade de ação tardia (AIT em Bignoniaceae, embora poucas espécies tenham sido investigadas e ocorram outros tipos de sistemas reprodutivos na família. O presente estudo objetivou determinar o sistema reprodutivo de T. roseo-alba através de experimentos de polinizações controladas, análise histológica dos eventos posteriores à polinização, verificação do desenvolvimento in situ dos tubos polínicos e testes de germinação de sementes. Apesar de os tubos polínicos penetrarem e fecundarem a maioria dos óvulos em pistilos autopolinizados, o aborto de 100% dos mesmos foi verificado e, embora sua abscisão tenha ocorrido entre o quarto e o sexto dia após o início da antese, observou-se um ligeiro crescimento dos óvulos e do ovário precedendo a abscisão, porém inferior ao crescimento nos pistilos submetidos à polinização cruzada. A endospermogênese inicial e a formação do tubo proembriônico também foram mais lentas nos pistilos autopolinizados. A longevidade dos pistilos autopolinizados foi maior que a de pistilos não polinizados, e a taxa de germinação de sementes foi de 93%, sendo todas as sementes monoembriônicas. Os resultados demonstram que T. roseo-alba é espécie auto-estéril, destituída de poliembrionia e que apresenta AIT pós-zigótica.Breeding system studies have indicated the predominance of late-acting self-incompatibility (LSI in Bignoniaceae, despite the relatively few species investigated, and the occurrence of other kinds of breeding systems in this family. This study aimed to determine the breeding system in T. roseo-alba by means of controlled experimental pollination, histological analysis of post-pollination events, and studies of pistil longevity, in situ pollen tube growth and seed germination. Despite pollen tube penetration and fertilization of most ovules of selfed pistils, 100% of these pistils aborted

  15. La comunidad en transformación. Análisis del cambio en la comunidad del ?Doctorado de Psicología Social Crítica? producido por las TIC?s

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    Maya Ninova

    2005-05-01

    Full Text Available A partir de la definición de comunidad virtual de Rheingold pretendemos hacer un análisis de la comunidad virtual del ?Doctorado de Psicología Social Crítica? (DPSC. La introducción y el uso masivo de las TIC?s (Tecnologías de la Información y de la Comunicación ha generado una transformación muy significativa en la forma de participar en una comunidad como la que encontramos en los DPSC. En esta comunicación pretendemos analizar cómo la introducción de esta nueva forma de relación ha generado cambios en la modalidad de nuestras interacciones y de nuestra identidad como miembros de la comunidad DPSC; para ello contaremos con entrevistas realizadas a los coordinadores de DPSC. Analizaremos la transformación de DPSC a partir de la teoría de P. Lévy.

  16. LA FORMULACIÓN DE LA SITUACIÓN PROBLEMA EN LAS TESIS DEL DOCTORADO EN PSICOLOGÍA DE LA UNIVERSIDAD NACIONAL DE ROSARIO: ERRORES COMUNES Y PROPUESTAS DE SOLUCIÓN

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    Florencia Laura Rovetto

    2015-01-01

    Full Text Available En esta publicación abordamos la experiencia realizada con los alumnos del Doctorado dePsicología de la Universidad Nacional de Rosario (Argentina en el Seminario de Escritura deTesis I como espacio de reflexión e innovación para favorecer la metacognición requerida en elproceso inicial de elaboración escrita de la tesis. En el transcurso del seminario hemos detecta-do como un inconveniente general, entre muchos otros, la dificultad para formular la situaciónproblema que se les presenta a los doctorandos. En función de ello y del trabajo concreto enel aula, hemos implementado, en tanto docentes responsables del curso, una estrategia que,fundada en la perspectiva constructivista sociocultural, ha intentado sacar a luz las hipótesissubyacentes de los doctorandos, como lectores críticos de sus propios textos. En este trabajo,mostramos el modo concreto de intervención en el aula con ejemplos que han permitido laresolución de problemas suscitados durante el seminario.

  17. Uncorrected land-use planning highlighted by flooding: the Alba case study (Piedmont, Italy

    Directory of Open Access Journals (Sweden)

    F. Luino

    2012-07-01

    Full Text Available Alba is a town of over 30 000 inhabitants located along the Tanaro River (Piedmont, northwestern Italy and is famous for its wine and white truffles. Many important industries and companies are based in Alba, including the famous confectionery group Ferrero.

    The town suffered considerably from a flood that occurred on 5–6 November 1994. Forty-eight percent of the urban area was inundated, causing severe damage and killing nine people. After the flood, the Alba area was analysed in detail to determine the reasons for its vulnerability.

    Information on serious floods in this area since 1800 was gathered from official records, state technical office reports, unpublished documents in the municipal archives, and articles published in local and national newspapers. Maps, plans and aerial photographs (since 1954 were examined to reconstruct Alba's urban development over the last two centuries and the planform changes of the Tanaro River.

    The results were compared with the effects of the November 1994 flood, which was mapped from aerial photographs taken immediately after the flood, field surveys and eyewitness reports.

    The territory of Alba was subdivided into six categories: residential; public service; industrial, commercial and hotels; sports areas, utilities and standards (public gardens, parks, athletics grounds, private and public sport clubs; aggregate plants and dumps; and agriculture and riverine strip. The six categories were then grouped into three classes with different flooding-vulnerability levels according to various parameters. Using GIS, the three river corridors along the Tanaro identified by the Autorità di Bacino del Fiume Po were overlaid on the three classes to produce a final map of the risk areas.

    This study shows that the historic floods and their dynamics have not been duly considered in the land-use planning of Alba. The zones that were most heavily damaged in the 1994 flood were

  18. Uncorrected land-use planning highlighted by flooding: the Alba case study (Piedmont, Italy)

    Science.gov (United States)

    Luino, F.; Turconi, L.; Petrea, C.; Nigrelli, G.

    2012-07-01

    Alba is a town of over 30 000 inhabitants located along the Tanaro River (Piedmont, northwestern Italy) and is famous for its wine and white truffles. Many important industries and companies are based in Alba, including the famous confectionery group Ferrero. The town suffered considerably from a flood that occurred on 5-6 November 1994. Forty-eight percent of the urban area was inundated, causing severe damage and killing nine people. After the flood, the Alba area was analysed in detail to determine the reasons for its vulnerability. Information on serious floods in this area since 1800 was gathered from official records, state technical office reports, unpublished documents in the municipal archives, and articles published in local and national newspapers. Maps, plans and aerial photographs (since 1954) were examined to reconstruct Alba's urban development over the last two centuries and the planform changes of the Tanaro River. The results were compared with the effects of the November 1994 flood, which was mapped from aerial photographs taken immediately after the flood, field surveys and eyewitness reports. The territory of Alba was subdivided into six categories: residential; public service; industrial, commercial and hotels; sports areas, utilities and standards (public gardens, parks, athletics grounds, private and public sport clubs); aggregate plants and dumps; and agriculture and riverine strip. The six categories were then grouped into three classes with different flooding-vulnerability levels according to various parameters. Using GIS, the three river corridors along the Tanaro identified by the Autorità di Bacino del Fiume Po were overlaid on the three classes to produce a final map of the risk areas. This study shows that the historic floods and their dynamics have not been duly considered in the land-use planning of Alba. The zones that were most heavily damaged in the 1994 flood were those that were frequently affected in the past and sites of

  19. Reducing School Violence: School-Based Curricular Programs and School Climate

    Science.gov (United States)

    Greene, Michael B.

    2008-01-01

    This article examines two different, but interrelated approaches to reduce school violence: school-based curricular programs and efforts to change school climate. The state of the research for each is reviewed and the relationship between them is explored.

  20. Adventure Stories for Reading, Learning and Literacy Cross-curricular resources for the primary school

    CERN Document Server

    Leicester, Mal

    2010-01-01

    Takes a unique approach to cross-curricular teaching in the primary classroom. Providing eight original adventure stories, this title builds up a suite of resources and activities for teachers to use in the classroom

  1. La profesionalización del recurso humano policial. Aspectos curriculares que se deben contemplar

    OpenAIRE

    María Gabriela Arce Navarro

    2008-01-01

    This article develops a proposal of curricular organization which guarantees the accomplishment of the objectives, goals and functions entrusted to the National Police School, organization chartered to form and train the people in charge of the citizen security of our country. The proposal considers elements not established by this educative center yet, contributing with significant curricular advances for the future implementation. On the other hand, it describes the components that characte...

  2. Tuning-América Latina y su compatibilidad con el modelo curricular cubano

    Directory of Open Access Journals (Sweden)

    Rebeca Vega Miche

    2009-01-01

    El objetivo de este trabajo consiste en analizar cómo las competencias genéricas acordadas por el proyecto Tuning son compatibles con el modelo curricular cubano que persigue la formación integral del profesional. Se valora a partir de la experiencia de la licenciatura de química el desarrollo de las habilidades y capacidades de Tuning a partir de las diferentes actividades curriculares.

  3. Una mirada a la planificación estratégica curricular

    Directory of Open Access Journals (Sweden)

    Navarro, Yasmile

    2010-05-01

    Full Text Available La presente investigación tiene como objetivo fundamental explorar la planificación curricular de la educación formal en su devenir histórico a partir de las teorías curriculares y disciplinas auxiliares. La metodología de la investigación es descriptiva documental sustentada en autores de reconocida trayectoria en los temas de planificación, currículo y planificación curricular, entre los que destacan Peñaloza (1995, Taba (1984, Tyler (1982, Díaz Barriga (1984, Arnaz (1981, López (2001, Corredor (2004, Ander-Egg (2004, Jáuregui (1988, Villarroel (1990, Orta de Useche y Useche (2000, Iafrancesco (2004, Correa de Molina (2004, Vílchez (1995 y Tobón et al. (2006. Los resultados evidencian que la planificación curricular surge a partir de la década de los veinte y se sistematiza a mediados de los cincuenta. A partir de entonces se define el currículo como plan, al tiempo que se asumen los enfoques vigentes de planificación administrativa, ésta última inicialmente relacionada más con la organización de estrategias instruccionales y recursos didácticos que como instrumento orientador del desarrollo curricular. En décadas posteriores, diversos autores han propuesto la planificación curricular con una visión estratégica. Se concluye que el currículo responde fundamentalmente a la perspectiva de los planificadores curriculares. Se propone considerar al currículo como una estrategia que se formule, ejecute y evalúe de acuerdo a un plan estratégico institucional que oriente la gestión curricular.

  4. Fernando Alba: espacio escultórico, espacio arquitectónico y espacio urbano

    OpenAIRE

    Martínez Sierra, Jovino

    2012-01-01

    El tema objeto de estudio de esta Tesis Doctoral es el análisis de la obra del escultor asturiano Fernando Alba, uno de los escultores contemporáneos de Asturias que cuenta con una trayectoria de más de cuarenta años de actividad ininterrumpida dentro de la plástica y uno de los artistas que ha dejado una muestra importante por número y calidad de su actividad dentro y fuera de la región. El estudio del conjunto de su producción resulta fundamental para el conocimiento del arte asturiano a...

  5. Six new record species of whiteflies (Hemiptera: Aleyrodidae) infesting Morus alba in China.

    Science.gov (United States)

    Wang, Ji-Rui; Song, Zao-Qin; Du, Yu-Zhou

    2014-01-01

    To determine the species of whiteflies occurring on mulberry, Morus alba L. (Rosales: Moraceae) in China, we collected samples in more than 87 sites in 16 provinces of China from 2008 to 2011. In total, 10 species, representing seven genera of the subfamily Aleyrodinae, were identified. Of these, six species are newly recorded on mulberry in China, namely, Aleuroclava ficicola Takahashi, Aleuroclava gordoniae (Takahashi), Aleurotrachelus camelliae (Kuwana), Bemisia afer (Priesner & Hosny), Bemisia tabaci Gennadius, and Pealius machili Takahashi. Information on the taxonomy, distribution, and host plants of the whitefly species found on mulberry in China, along with a brief description and illustrations of each species are provided.

  6. Ventajas competitivas de la empresas grannacionales como modelo empresarial del ALBA-TCP

    OpenAIRE

    Pinho De Oliveira, María Fátima

    2012-01-01

    En la presente investigación, se pretende analizar algunas de las ventajas competitivas de las empresas grannacionales como modelos empresariales dentro del marco del ALBA-TCP, motivado a que debido a la globalización como fenómeno mundial, aunado con las condiciones económicas de países asociados, se ven afectados por las competencias económicas de compañías a nivel mundial. Con la integración económica desarrollada en Europa con el fin de alcanzar la paz, el progreso y ocupar la mejor posic...

  7. Comparison of the pathogenicity, growth, sporulation and morphology of Pezicula alba Guthrie (Gloeosporium album Osterw.

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    H. Borecka

    2013-12-01

    Full Text Available Sixteen isolates of Pezicula alba Guthr. were examined. The intensity of growth on various media, pathogenicity to apple fruits and twigs, colour of cultures and size of conidia were measured. Some isolates are pathogenic to fruits, some others to twigs; one isolate (only no. 19 is pathogenic to both twigs and fruits; many isolates are not - pathogenic at all. Culture growth, sporulation and size of conidia are not correlated with the pathogenicity of the isolate. The mean size of conidia is 21.29µm x 3.48µm.

  8. Chalcone-derived Diels-Alder adducts as NF-κB inhibitors from Morus alba.

    Science.gov (United States)

    Phung, Thi Xuan Binh; Tran, Thi Hong Hanh; Dan, Thi Thuy Hang; Chau, Van Minh; Hoang, Thanh Huong; Nguyen, Tien Dat

    2012-01-01

    A bioassay-guided phytochemical fractionation of the methanol extract of the Morus alba root barks led to the isolation of two chalcone-derived Diels-Alder adducts (1 and 2). Their structures were elucidated as kuwanon J 2,4,10″-trimethyl ether (1) and kuwanon R (2) by means of spectroscopic methods. Both compounds strongly inhibited nuclear transcription factor.κB activity with the IC₅₀ values of 4.65 and 7.38 μM, respectively.

  9. Elaboración de Bebida Filtrante de la Hoja Morus Alba L con Efecto Hipoglucemiante

    OpenAIRE

    Ccopa Ihui, Giovanna; Universidad Alas Peruanas; Quispe Cruz, Ruth; Fernández Ccapatinta, Karina

    2008-01-01

    En el presente trabajo de investigación se evaluó el efecto reductor sobre la hiperglucemia (niveles de azúcar altos) del Morus alba L. (mora blanca) en ratas inducidas a la diabetes experimental a nivel de laboratorio.Luego de las pruebas bioquímicas con respecto al efecto hipoglucemiante (niveles de azúcar bajos) de la mora, se concluyó que en su composición intervienen flavonoides, sustancias que participan a nivel celular en la disminución de azúcar en la sangre.Con esta información se bu...

  10. Morphology and histochemistry of glandular trichomes of Orobanche alba Stephan ex Willd

    Directory of Open Access Journals (Sweden)

    Aneta Sulborska

    2014-04-01

    Full Text Available Orobanche alba Stephan ex Willd is an achlorophyllous root parasite rare in Poland. It prefers dry and sunny slopes, xerothermic grasslands and pastures, mountain pastures, light scrubs, and rock fissures and ledges. The hosts of O. alba include Thymus polytrichus A. ern. ex Borbás, Clinopodium vulgare L. and Origanum vulgare L. The tick and fleshy 10-70 cm high stem in this species bears an inflorescence composed of zygomorphic, white or yellow “spotted” flowers covered by purple glandular trichomes. Glandular trichomes of this type are also borne on other parts of the plant, i.e. on the stem, scaly leaves, sepals, filaments, and the style. The secondary metabolites secreted by the glandular trichomes are related to defense of plants against the attack of herbivores and pathogens or act as attractants to pollinators or for fruit dispersal. The micromorphology and histochemistry of the glandular trichomes in O. alba were examined using scanning electron and light microscopes. In order to determine the type of secondary metabolites produced by the trichomes, the flowing histochemical assays were used: Sudan III and neutral red for detection of lipophilic compounds, IKI for detection of starch, and FeCl3 for detection of phenolic compounds. The peltate glandular trichomes of O. alba were characterised by a varied length (0.15‑0.48 mm and different activity phases. The trichome was composed of one larger basal epidermal cell, 1-3 hyaline stalk cells with a striated cuticle, a neck cell with a smooth cuticle on the surface, and a globose head formed of 8-18 secretory cells arranged in a circle. Many stalk cells of the trichomes, particularly those located on the corolla, contained anthocyanins, which give the trichomes dark carmine colour. In turn, the colour of the heads was dependent on trichome age: the heads were brown in older trichomes and yellow in younger hairs. Secretion was produced by both young and older trichomes. It penetrated

  11. Electron probe microanalysis of fluorine in polluted needle sections of Abies alba

    Energy Technology Data Exchange (ETDEWEB)

    Garrec, J.P.; Lhoste, A.M.

    1976-01-01

    After fumigation with hydrogen fluoride, sections of needles of Abies alba were studied by electron probe microanalysis. The levels of fluoride vary in different tissues: most fluoride was found in the spongy mesophyll and the palisade tissues as a function of the distance from the cells of entry and the paths of translocation of fluoride. These results support the view that the differential responses of various tissues of a leaf to fumigation with HF depend on the localization of the tissues rather than on a specific response by a particular tissue to fluoride. 15 references, 6 figures.

  12. De novo Transcriptome Analysis of Sinapis alba in Revealing the Glucosinolate and Phytochelatin Pathways

    Science.gov (United States)

    Zhang, Xiaohui; Liu, Tongjin; Duan, Mengmeng; Song, Jiangping; Li, Xixiang

    2016-01-01

    Sinapis alba is an important condiment crop and can also be used as a phytoremediation plant. Though it has important economic and agronomic values, sequence data, and the genetic tools are still rare in this plant. In the present study, a de novo transcriptome based on the transcriptions of leaves, stems, and roots was assembled for S. alba for the first time. The transcriptome contains 47,972 unigenes with a mean length of 1185 nt and an N50 of 1672 nt. Among these unigenes, 46,535 (97%) unigenes were annotated by at least one of the following databases: NCBI non-redundant (Nr), Swiss-Prot, Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway, Gene Ontology (GO), and Clusters of Orthologous Groups of proteins (COGs). The tissue expression pattern profiles revealed that 3489, 1361, and 8482 unigenes were predominantly expressed in the leaves, stems, and roots of S. alba, respectively. Genes predominantly expressed in the leaf were enriched in photosynthesis- and carbon fixation-related pathways. Genes predominantly expressed in the stem were enriched in not only pathways related to sugar, ether lipid, and amino acid metabolisms but also plant hormone signal transduction and circadian rhythm pathways, while the root-dominant genes were enriched in pathways related to lignin and cellulose syntheses, involved in plant-pathogen interactions, and potentially responsible for heavy metal chelating, and detoxification. Based on this transcriptome, 14,727 simple sequence repeats (SSRs) were identified, and 12,830 pairs of primers were developed for 2522 SSR-containing unigenes. Additionally, the glucosinolate (GSL) and phytochelatin metabolic pathways, which give the characteristic flavor and the heavy metal tolerance of this plant, were intensively analyzed. The genes of aliphatic GSLs pathway were predominantly expressed in roots. The absence of aliphatic GSLs in leaf tissues was due to the shutdown of BCAT4, MAM1, and CYP79F1 expressions. Glutathione was extensively

  13. Zu den Quinquennales D.D. in den fasti et alba augustalium aus ostia

    OpenAIRE

    Abramenko, A.

    1992-01-01

    En los Fasti y Alba Augustalium aparece regularmente tras el título de los quinquenales la abreviatura dd. Si bien existe acuerdo de que ésta no deba, como se suele, ser interpretada d(ecreto) d(ecurionum), sino d(ono) d(ato), esta última propuesta había permanecido hasta ahora sin prueba definitiva. Sobre la base de otros usos de la abreviatura dd se verá aquí que la interpretación d(ono) d(ato) es la justa, exponiéndose las razones por las cuales se utiliza esta fórmula en Ostia.

  14. De novo transcriptome analysis of Sinapis alba in revealing the glucosinolate and phytochelatin pathways

    Directory of Open Access Journals (Sweden)

    Xiaohui eZhang

    2016-03-01

    Full Text Available Sinapis alba is an important condiment crop and can also be used as a phytoremediation plant. Though it has important economic and agronomic values, sequence data and the genetic tools are still rare in this plant. In the present study, a de novo transcriptome based on the transcriptions of leaves, stems and roots was assembled for S. alba for the first time. The transcriptome contains 47,972 unigenes with a mean length of 1,185 nt and an N50 of 1,672 nt. Among these unigenes, 46,535 (97% unigenes were annotated by at least one of the following databases: NCBI non-redundant (Nr, Swiss-Prot, Kyoto Encyclopedia of Genes and Genomes (KEGG pathway, Gene Ontology (GO, and Clusters of Orthologous Groups of proteins (COGs. The tissue expression pattern profiles revealed that 3,489, 1,361 and 8,482 unigenes were predominantly expressed in the leaves, stems and roots of S. alba, respectively. Genes predominantly expressed in the leaf were enriched in photosynthesis- and carbon fixation-related pathways. Genes predominantly expressed in the stem were enriched in not only pathways related to sugar, ether lipid and amino acid metabolisms but also plant hormone signal transduction and circadian rhythm pathways, while the root-dominant genes were enriched in pathways related to lignin and cellulose syntheses, involved in plant-pathogen interactions, and potentially responsible for heavy metal chelating and detoxification. Based on this transcriptome, 14,727 simple sequence repeats (SSRs were identified, and 12,830 pairs of primers were developed for 2,522 SSR-containing unigenes. Additionally, the glucosinolate (GSL and phytochelatin metabolic pathways, which give the characteristic flavor and the heavy metal tolerance of this plant, were intensively analyzed. The genes of aliphatic GSLs pathway were predominantly expressed in roots. The absence of aliphatic GSLs in leaf tissues was due to the shutdown of BCAT4, MAM1 and CYP79F1 expressions. Glutathione was

  15. Human colon cancer HT-29 cell death responses to doxorubicin and Morus Alba leaves flavonoid extract.

    Science.gov (United States)

    Fallah, S; Karimi, A; Panahi, G; Gerayesh Nejad, S; Fadaei, R; Seifi, M

    2016-03-31

    The mechanistic basis for the biological properties of Morus alba flavonoid extract (MFE) and chemotherapy drug of doxorubicin on human colon cancer HT-29 cell line death are unknown. The effect of doxorubicin and flavonoid extract on colon cancer HT-29 cell line death and identification of APC gene expression and PARP concentration of HT-29 cell line were investigated. The results showed that flavonoid extract and doxorubicin induce a dose dependent cell death in HT-29 cell line. MFE and doxorubicin exert a cytotoxic effect on human colon cancer HT-29 cell line by probably promoting or induction of apoptosis.

  16. Pityriasis Alba--Common Disease, Enigmatic Entity: Up-to-Date Review of the Literature.

    Science.gov (United States)

    Miazek, Nina; Michalek, Irmina; Pawlowska-Kisiel, Malgorzata; Olszewska, Malgorzata; Rudnicka, Lidia

    2015-01-01

    Pityriasis alba (PA) is a skin disorder that affects children and adolescents. Although it is common worldwide, its incidence is markedly higher in darker skin phototypes. Its characteristic features include an extended, multistage course and spontaneous remissions and recurrences. Preceded by erythematous changes, patches of hypopigmented skin of up to a few centimeters in diameter appear on the upper body. Pruritus may accompany it. Even though its etiology is unknown, possible reported triggering factors include sunlight, beauty treatments, and microorganisms, among others. Calcineurin inhibitors play the most crucial role in PA pharmacotherapy. PA often coexists with atopic dermatitis and is considered one of its milder forms.

  17. Multiple Intelligences within the Cross-Curricular Approach

    Directory of Open Access Journals (Sweden)

    Anthoula Vaiou

    2010-02-01

    Full Text Available The present study was realized in a Greek 6th grade State Primary School class and was based on Howard Gardner’s theory of multiple intelligences, which was first introduced in 1983. More particularly, it was explored to what extent the young learners possess multiple intelligences through the use of a specially-designed questionnaire and a series of interviews. The findings of the above have served as a tool to the construction of a project work based on students’ learning preferences within a cross-curricular framework, easily applicable to the Greek State School curriculum. All learners were activated to participate within a school environment that traditionally promotes linguistic and mathematical skills matching dominant multiple intelligences or a combination of some of them to thematic units already taught by Greek teachers. The suggested project was assessed through observation and student portfolio, showing that the young learners’ multiple intelligences were exploited to a great extent, promoting the learning process satisfactorily. The results of this study can provide a contribution to the literature of multiple intelligences in the Greek reality and suggest a need for further consideration and exploration in the field. Finally, the researcher of this study hopes the present work could function as a springboard for more elaborated studies in the future.

  18. Deconstructing the I and SLA in ISLA: One curricular approach

    Directory of Open Access Journals (Sweden)

    Ronald P. Leow

    2016-03-01

    Full Text Available Instructed second language acquisition (ISLA has been referenced in the larger field of the SLA literature for over two and a half decades. Currently, there are several theoretical underpinnings accounting for processes assumed to play a role in ISLA and quite an impressive number of studies have empirically addressed some aspect(s of ISLA. Recently, a lengthy and relatively cohesive treatise of this substrand of SLA research in relation to both theoretical, empirical, and pedagogical perspectives has been published in two books (cf. Leow, 2015a; Loewen, 2015, and a new model of the L2 learning process in ISLA has been proposed (Leow, 2015a. These publications are timely and important given that the concept of ISLA not only needs to be clearly defined but also situated contextually. To this end, this article (a revisits current definitions of ISLA in the SLA literature with the aim of identifying specific features of ISLA that underlie such definitions, (b deconstructs ISLA by probing deeper into what comprises the terms instructed and SLA in ISLA, (c provides a brief summary of the cognitive processes and variables postulated by the theoretical underpinnings of ISLA and pertinent empirical research, (d recommends that ISLA be observed from one curricular approach together with its empirical and pedagogical ramifications, and (e provides some measure of direction future ISLA research may follow.

  19. CONSTRUINDO UM MODELO CURRICULAR INTEGRADO PARA A EJA/FIC

    Directory of Open Access Journals (Sweden)

    Raimundo Nonato O. Furtado

    2013-11-01

    Full Text Available Esse trabalho apresenta um modelo possível de desenvolvimento estrutural curricular integral, composto a partir da experiência dos autores, com o Projeto Mulheres Mil – Educação, Cidadania e Desenvolvimento Sustentável, Sub-Projeto “Desenvolvimento Comunitário: Impacto na Qualidade de Vida e Ambiental”, firmado pela parceria SETEC/MEC e o Group Collegia, do Quebec, Canadá. O Projeto Mulheres Mil foi inicialmente desenhado para execução da Rede Norte-Nordeste dos ex-CEFETs, hoje Institutos Federais, com execução a partir de 2008, no Instituto Federal da Paraíba, Campus João Pessoa. Teve o objetivo de apoiar, na prática, um dos modelos de políticas de inclusão social, revestido, na forma inicial, pelo Reconhecimento da Aprendizagem Prévia, tendo como alvo pessoas fora da faixa etária da escolaridade regular, trabalhadoras e, sem exceção, mulheres.

  20. CURRICULAR DESIGN FOR THE CONSTRUCTION OF A PEACE CULTURE

    Directory of Open Access Journals (Sweden)

    Raiza González

    2009-04-01

    Full Text Available This investigation had as purpose from the analysis of the contributions of sciences of the conduct, pedagogical and spiritual, to apply a curricular design for the development of competitions  in the educational one like mediator of a culture of peace in the classroom. study was descriptive, of action-reflection-intervention in the modality of study of case with application of tests you diagnose, observation log, shootings, psicoterapéuticas interviews, techniques and factories, considering the analysis units: documents and   students. The population was represented by the students of the Elective I: mention Sciences and Technology of the Education. The results revealed that educational as mediating of a peace culture must demonstrate competitions of knowing, doing, to coexist and to be; in the field of the Neurolingüística; conflict mediation; familiar constellations; psiconeuroimunología; support psycotherapy; intelligence  interpersonal, emotional and naturista; abilities for the negotiation and cooperation; responsibility, respect, discipline, honesty, gratitude, coherence, empathy, spiritual development,  faith and nonviolence.

  1. Proyecto curricular institucional: Una alternativa para el cambio

    Directory of Open Access Journals (Sweden)

    Ruth Vallejo

    2002-01-01

    Full Text Available Enfrentar el desafío de la construcción del proyecto curricular institucional representa para la educación de este milenio una prioridad, esto sin lugar a dudas, requiere de un cambio en la estructura organizativa y de gestión en cada plantel; el Currículo Básico Nacional, en marcha, representa un avance significativo, para superar esta situación. Para que esta reforma constituya una alternativa válida, es necesario abordar la formación del docente de forma sistemática, continúa desde su praxis por medio de la investigación-acción, utilizando herramientas metodológicas para el diagnóstico y acompañando todo el proceso con una evaluación institucional que al mismo tiempo que se analiza e implementa permita la formación de los actores involucrados; la revisión y los ajustes permanentes conducen a la construcción de aproximaciones sucesivas que con el trabajo concertado garantizan la viabilidad del proyecto. Se recomienda asumirlo con un carácter cíclico y dinámico para decidir si se puede o no mantener a la luz de los cambios que ocurran dentro y fuera del proceso.

  2. O comportamento informacional no estágio curricular

    Directory of Open Access Journals (Sweden)

    Sandra Regina Moitinho Lage

    2014-02-01

    Full Text Available Com o objetivo de investigar o comportamento informacional no desenvolvimento do estágio curricular obrigatório dos alunos de um curso de graduação em Biblioteconomia, realizou-se este estudo. Um questionário foi aplicado para 20 estagiários, investigando as suas necessidades de informação, as formas e as fontes em que buscam a informação e o uso que dela fazem. Dentre os principais resultados constatou-se que os participantes percebem a relação da teoria aprendida em sala de aula quando enfrentam situações no ambiente de estágio, e que este ambiente sempre possibilita a interação na troca de conhecimentos e experiências. A fonte de informação mais utilizada no desenvolvimento das atividades no estágio são os colegas de sala de aula. No entanto, a internet, livros, artigos e os professores merecem destaque. Para muitos participantes o estágio contribuiu de alguma forma, atendendo às expectativas para aquisição de novos conhecimentos e experiências práticas importantes.

  3. Intergeneric Somatic Hybridization Between Brassica napus L. And Sinapis alba L.

    Institute of Scientific and Technical Information of China (English)

    You-Ping WANG; Karin SONNTAG; Eicke RUDLOFF; Jian-Min CHEN

    2005-01-01

    Electrically induced protoplast fusion was used to produce somatic hybrids between Brassica napus L. and Sinapis alba L. Seven hybrids were obtained and verified by the simple sequence repeat and cleaved amplified polymorphic sequence analysis of the genefael, indicating that the characteristic bands from S. alba were present in the hybrids. The hybridity was also confirmed by chromosome number counting because the hybrids possessed 62 chromosomes, corresponding to the sum of fusion-parent chromosomes. Chromosome pairing at meiosis was predominantly normal, which led to high pollen fertility,ranging from 66% to 77%. All hybrids were grown to full maturity and could be fertilized and set seed after self-pollination or back-crosses with B. napus. The morphology of the hybrids resembled characteristics from both parental species. An analysis of the fatty acid composition in the seeds of F1 plants was conducted and the seeds were found to contain different amounts of erucic acid, ranging from 11.0% to 52.1%.

  4. Reproductive isolation between sympatric sister species, Mussaenda kwangtungensis and M. pubescens var. alba

    Institute of Scientific and Technical Information of China (English)

    Zhonglai Luo; Tingting Duan; Shuai Yuan; Shi Chen; Xiufeng Bai; Dianxiang Zhang

    2015-01-01

    Reproductive isolation defines the biological species concept and plays a key role in the formation and maintenance of species. The relative contributions of different isolating stages has been suggested to be closely associated with phylogenetic relatedness. Few studies have focused on the relative contributions of pre- versus post-zygotic mechanisms, and even fewer have been conducted under strict phylogenetic frameworks. Pre-and post-zygotic reproductive isolation stages have been investigated in the sister species Mussaenda kwangtungensis and M. pubescens var. alba. The two species have partly overlapping distribu-tion ranges and flowering times, while the principal pollinators differed strikingly for them, demonstrating strong pre-zygotic isolations. Natural hybrids were detected by simple sequence repeat markers and their maternal parents were identified based on chloroplast gene sequen-ces. Five out of 81 individuals were suggested to be hybrids that fall into the categories F2, BC1, and BC2 by the NewHybrids analysis. Interspecific crossings resulted in significantly reduced fruit set and seed germination rates. Phylogenetic analysis revealed short Kimura-2-parameter distance between M. kwangtungensis and M. pubescens var. alba. These findings strongly supported the hypothesis that for species with a closer phylogenetic relationship, pre-zygotic isolation plays an important part in limiting gene exchange in sympatric areas.

  5. Lippia alba essential oil promotes survival of silver catfish (Rhamdia quelen infected with Aeromonassp.

    Directory of Open Access Journals (Sweden)

    FERNANDO J. SUTILI

    2015-03-01

    Full Text Available In vitro and in vivo activity of the Lippia alba essential oil (EO against Aeromonas sp. was evaluated. In the in vitro assay the minimum inhibitory concentration (MIC and a minimum bactericidal concentration (MBC of EO for Aeromonas cells were determined using the microdilution method. Twenty five strains of Aeromonassp. isolated from infected fish obtained from local fish farms were used. MIC and MBC values were 2862 and 5998 µg mL-1 for L. alba EO and 0.5 and 1.2 µg mL-1for gentamicin, respectively. In the in vivo assay silver catfish juveniles (Rhamdia quelen (7.50 ± 1.85 g and 10.0 ± 1.0 cm with typical injuries associated to Aeromonas infection were divided into four treatments (in triplicate n=10: untreated fish (negative control, 10 mg L-1 of gentamicin, and 20 or 50 µL L-1 of EO. Fish were maintained in aerated 20 L plastic boxes. After 10 days survival of silver catfish infected with Aermonas sp. and treated with essential oil (50 µL L-1 was greater than 90%.

  6. Seasonal variability of the antimicrobial activity of the essential oil of Lippia alba

    Directory of Open Access Journals (Sweden)

    Terezinha Feitosa Machado

    Full Text Available Lippia alba is a shrub of the Verbenaceae family, popularly known as lemon balm. It's essential oil is said to have broad-spectrum antimicrobial activity whose effectiveness varies according to its composition, which is influenced by both biotic and abiotic factors. The present study aimed to evaluate the antimicrobial effectiveness of oil taken from the leaves of L. alba collected at different times of the year, against microorganisms of importance in food. The oil, obtained by hydrodistillation, was tested against standard cultures of Pseudomonas aeruginosa, Salmonella choleraesuis, Escherichia coli, Staphylococcus aureus, Listeria monocytogenes and Listeria innocua using agar diffusion techniques. The different sampling times had a big influence on the efficiency of the oil, which varied in relation to each microbial species. From December to February the best response was against S. aureus. Against L. monocytogenes, the oil was effective from June to August, while for L. innocua, the oil presented the same response for three periods of the year, differing only from March to May. Correlation of meteorological data for 2010 makes it possible to verify that characteristics typical of the period from December to February in the town of Paraipaba, in the Brazilian state of Ceará (high temperatures, long periods of sunshine and low rainfall favoured the action of the oil against S. aureus. In turn, from June to August, seasonal conditions enhanced the action of the oil against L. monocytogenes and L. innocua.

  7. Pharmacological effects of ethanol extract of Egyptian Artemisia herba-alba in rats and mice

    Institute of Scientific and Technical Information of China (English)

    Heba Mohammed Ibrahim Abdallah; Nawal E.L. Sayed Gomaa

    2016-01-01

    Objective: To investigate some pharmacological effects including gastroprotective, anti-inflammatory, analgesic, antipyretic and in vitro antioxidant effects of Artemisia herba-alba extract in different experimental models. Methods: Inflammation was induced in rat paw by subcutaneous injection of 1% (v/v) carrageenan solution. Writhes was induced in mice by intraperitoneal injection of 0.6%(v/v) acetic acid solution. Pyrexia was induced using Brewer's yeast suspension. Gastric lesion was induced in rats by oral administration of 99% ethanol. The anti-inflammatory, analgesic, antipyretic and gastroprotective activities of Artemisia herba-alba extract were investigated respectively. In vitro antioxidant effect was investigated using DPPH free radical. Results: The plant extract showed anti-inflammatory effect in carrageenan-induced paw edema in rats, analgesic effect against acetic acid-induced writhing, and antipyretic ac-tivity in Brewer's yeast model of pyrexia. Besides, it was shown to be a gastroprotective agent against ethanol-induced gastric ulcers. The plant also exhibited a free radical scavenging potential in an in vitro antioxidant study using DPPH. Conclusions: The results validate the use of the investigated plant in traditional medicine for different ailments.

  8. Selection of new clones of linalool chemotype from genetic recombination in Lippia alba

    Directory of Open Access Journals (Sweden)

    Elcio Rodrigo Rufino

    2012-01-01

    Full Text Available The aromatic and medicinal species Lippia alba is vigorous and rugged native to the South America (Atlantic Rainforest. Because it is an allogamous and self-incompatible species, natural populations have high morphological and chemical variability. This work had as objective to conduct a preliminary screening to identify new promising clones from a novel (recombinant base population of Lippia alba with regard to its agronomic and phytochemical traits, using the linalool oil or chemotype as model. The two superior linalool clones, obtained by collection, were used as controls. Traits evaluated included: dry mass of leaves (DML, oil yield percentage (EOY%, oil production per plant (OP, and linalool percentage (LN%. Forty linalool chemotype clones were evaluated in three experiments, in a random block design with four replicates and four cuttings (clones per plot. Besides means comparisons, multivariate analysis was used in order to aid in the preliminary selection of clones. There were positive correlations from moderate to strong for DML vs. EOY%, OP vs. EOY% and DML vs. OP. Linalool clones superior or similar to both controls were identified for the DML, EOY%, OP, and LN% traits (univariate analyses, aimed at further validating experimentation. Five distinct groups were defined in the cluster analysis (UPGMA, each containing subgroups as well.

  9. New diketopiperazine derivatives from a deep-sea-derived Nocardiopsis alba SCSIO 03039.

    Science.gov (United States)

    Zhang, Qingbo; Li, Sumei; Chen, Yuchan; Tian, Xinpeng; Zhang, Haibo; Zhang, Guangtao; Zhu, Yiguang; Zhang, Si; Zhang, Weimin; Zhang, Changsheng

    2013-01-01

    The strain SCSIO 03039 was isolated from a sediment sample in the Indian Ocean and was characterized as a Nocardiopsis alba species on the basis of its 16S rRNA gene sequence. Seven diketopiperazines (DKPs), including two new DKPs nocazines D (2a) and E (2b), and five known DKPs (1, 3-6), were isolated from N. alba SCSIO 03039, along with two known compounds 2-methoxy-1,4-naphthoquinone (7) and 1-hydroxy-4-methoxy-2-naphthoic acid (8). Their structures were elucidated by mass and NMR spectroscopic analyses. The structure of methoxyneihumicin (1), previously proposed in a conference poster lacking publicly available experimental data, was validated for the first time by detailed NMR analyses and X-ray diffraction study. The two enantiomers nocazines D (2a) and E (2b) were isolated as a mixture. Compounds 3 and 4 were only known as synthetic compounds before. Methoxyneihumicin (1) exhibited in vitro cytotoxicities against MCF-7 and SF-268 with IC₅₀ values of 4.6 and 12.7 μM, respectively, better than those of 6 (22.0 and 20.6 μM). The other compounds showed less pronounced cytotoxities against three tested human cancer cell lines and no compounds displayed antibacterial activities toward four indicator strains.

  10. Remove of lead from the polluted water by phytoremediation technique (Eclipta Alba plant

    Directory of Open Access Journals (Sweden)

    Mohamad J. Noufal, Zena A. Maalla, Dareen J. Noufal, Ali A. Hossean

    2017-01-01

    Full Text Available One of the major environmental problems is the pollution of water and soils by toxic heavy metals. The aim of current study was estimation the ability of Eclipta alba plant for the removal of (Pb from the polluted water by phytoremediation technique and study the effect of a number of parameters(Pb concentration, contact time and pH values. The plant showed higher removal efficiency (99.2% after 7 days of treatment at 50 ppm. The best removal efficiency of Pb 98.95% at 100 ppm was occurred at pH7. The root ability to accumulate Pb was more than the shoot ability, after 7 days treatment of water and pH=7, they were 2852.5 mg/kg, 2497.5 mg/kg and 502.5 mg/kg in roots, stems and leaves respectively. These results showed that Eclipta Alba can be used in biological treatment of polluted water.

  11. Lippia alba essential oil promotes survival of silver catfish (Rhamdia quelen) infected with Aeromonas sp.

    Science.gov (United States)

    Sutili, Fernando J; Cunha, Mauro A; Ziech, Rosangela E; Krewer, Carina C; Zeppenfeld, Carla C; Heldwein, Clarissa G; Gressler, Leticia T; Heinzmann, Berta M; Vargas, Agueda C; Baldisserotto, Bernardo

    2015-03-01

    In vitro and in vivo activity of the Lippia alba essential oil (EO) against Aeromonas sp. was evaluated. In the in vitro assay the minimum inhibitory concentration (MIC) and a minimum bactericidal concentration (MBC) of EO for Aeromonas cells were determined using the microdilution method. Twenty five strains of Aeromonas sp. isolated from infected fish obtained from local fish farms were used. MIC and MBC values were 2862 and 5998 µg mL-1 for L. alba EO and 0.5 and 1.2 µg mL-1 for gentamicin, respectively. In the in vivo assay silver catfish juveniles (Rhamdia quelen) (7.50 ± 1.85 g and 10.0 ± 1.0 cm) with typical injuries associated to Aeromonas infection were divided into four treatments (in triplicate n=10): untreated fish (negative control), 10 mg L-1 of gentamicin, and 20 or 50 µL L-1 of EO. Fish were maintained in aerated 20 L plastic boxes. After 10 days survival of silver catfish infected with Aermonas sp. and treated with essential oil (50 µL L-1) was greater than 90%.

  12. PLASTICIDAD FENOTÍPICA DE Lippia alba Y Lippia origanoides (VERBENACEAE EN RESPUESTA A LA DISPONIBILIDAD DE LUZ Phenotypic Plasticity of Lippia alba and Lippia origanoides (Vervenaceae in Response to Availability of Light

    Directory of Open Access Journals (Sweden)

    EDWIN PARRA TORRES

    Full Text Available La distribución de la especies es usualmente relacionada con la magnitud de la plasticidad fenotípica (PF. Con el fin de examinar la posible relación entre la magnitud de la PF y la amplitud ecológica en respuesta a la disponibilidad de luz, este trabajo evaluó la PF a través de la ontogenia en clones de Lippia alba y Lippia origanoides, especies congenéricas que presentan diferencias en su distribución. Clones de cada especie fueron distribuidos aleatoriamente en tres tratamientos, baja (33%, media (53%, y alta (100% disponibilidad lumínica. Se evaluó la PF de caracteres morfológicos y de asignación de biomasa a través de la ontogenia por medio de un análisis de varianza (ANAVA y la comparación interespecífica se realizó a través del índice de plasticidad fenotípica (RDPI. L. alba y L. origanoides presentaron variación de la plasticidad a través de la ontogenia en varios de los caracteres estudiados. La comparación interespecífica a través del RDPI mostró que la mayor PF de L. alba sobre L. origanoides en algún estado de la ontogenia no fue consistente ni uniforme a través de esta. Estos resultados sugieren una débil asociación entre la magnitud de la PF en respuesta a la disponibilidad lumínica. Además, indican que la mayor distribución de L. alba, se debe a un mayor desempeño en la tasa de crecimiento relativa y consecuentemente a una mayor acumulación de biomasa total, que posiblemente, le permiten alcanzar rápidamente su madurez sexual y así la colonización de nuevas áreas.The distribution of the plant species is usually related to the magnitude of the phenotypic plasticity (PF. With the purpose of to stablish the possible relationship between the magnitude of the PF and the ecological breadth in response to light availability, the PF during the ontogeny in clones of Lippia alba and Lippia origanoides was evaluated. Both species are congeneris and show differences in their distribution. Three random

  13. A formação prática de professores no estágio curricular Practical curricular training of teachers

    Directory of Open Access Journals (Sweden)

    Helena Maria dos Santos Felício

    2008-01-01

    Full Text Available Partindo da premissa de que a dimensão prática deve ser considerada na formação inicial de professores, entendemos que o Estágio Curricular, se bem fundamentado, estruturado e orientado, configura-se como um momento relevante na perspectiva curricular do processo de formação prática dos futuros professores. Dessa forma, o presente artigo apresenta algumas reflexões e discussões, oriundas de uma investigação qualitativa, sobre a importância e o papel do Estágio Curricular na formação prática de alunos. Os sujeitos desta pesquisa são alunos concluintes do Curso Normal Superior da Universidade do Vale do Paraíba (UNIVAP. A partir da interpretação de diferentes autores(LIMA, 2001; TARDIF, 2002; PIMENTA, 2001; GÓMEZ, 2000, compreendemos a prática enquanto práxis, uma vez que, permeada por um processo de reflexão, ela pode ser construída e reconstruída, objetivando a transformação da realidade escolar. Sendo assim, evidenciamos, nos relatórios apresentados e nos discursos dos alunos, as aprendizagens práticas consideradas construídas durante o estágio. Analisamos os dados recolhidos, à luz da teoria estudada sobre a formação prática e profissional dos professores. Identificamos os aspectos favoráveis e desfavoráveis da realização do estágio curricular na dimensão de ser um espaço/tempo, também destinado à construção de conhecimentos práticos na formação dos professores. E, finalmente, propomos novas perspectivas para a orientação e realização do estágio curricular na formação de professores, centradas na relevância da formação prática e na articulação entre todas as disciplinas do curso de formação.Based on the premise that the practical dimension must be considered in the initial training of teachers, we understand that curricular training, if well founded, structured and oriented, is relevant to the curricular outlook of the practical training process for future teachers. This article

  14. Toxicity of eight polycyclic aromatic compounds to the red clover (Trifolium pratense), ryegrass (Lolium perenne), and mustard (Sinapsis alba)

    DEFF Research Database (Denmark)

    Sverdrup, L. E.; Krogh, P. H.; Nielsen, T.

    2003-01-01

    The effect of eight polycyclic aromatic compounds (PACs) on the seed emergence and early life-stage growth of three terrestrial plants (Sinapsis alba, Trifolium pratense and Lolium perenne) were studied in a greenhouse, using a Danish agricultural soil with an organic carbon content of 1.6%. After...

  15. Toxicity of eight polycyclic aromatic compounds to red clover (Trifolium pratense), ryegrass (Lolium perenne), and mustard (Sinapsis alba)

    DEFF Research Database (Denmark)

    Sverdrup, L.E.; Krogh, P.H.; Nielsen, T.

    2003-01-01

    The effect of eight polycyclic aromatic compounds (PACs) on the seed emergence and early life-stage growth of three terrestrial plants (Sinapsis alba, Trifolium pratense and Lolium perenne) were studied in a greenhouse, using a Danish agricultural soil with an organic carbon content of 1.6%. After...

  16. Sex-specific costs of resistance to the fungal pathogen Ustilago violacea (Microbotryum violaceum) in Silene alba

    NARCIS (Netherlands)

    Biere, A.; Antonovics, J.

    1996-01-01

    Costs of resistance are often invoked to explain the maintenance of polymorphisms for resistance to fungal pathogens in natural plant populations. To investigate such costs, 27 half-sib families of Silene alba, collected from a single host population, were grown in experiment populations in the pres

  17. Impact of flowering phenology of Silene alba and S-dioica on susceptibility to fungal infection and seed predation

    NARCIS (Netherlands)

    Biere, A.; Honders, S.C.

    1996-01-01

    Timing of the production of susceptible host stages can have a large impact on a plant's probability of infection by pathogens and on the extent of damage caused by herbivores. In the closely related plant species Silene alba and S. dioica, flowers are the site of infection by the host-sterilizing a

  18. EFFECTS OF LIGHT AND TEMPERATURE ON Tabebuia serratifolia (Vahl Nich,Tabebuia chrysotricha (Mart. ex DC. Standl. AND Tabebuia roseo-alba (Ridl Sand – Bignoniaceae SEED GERMINATION

    Directory of Open Access Journals (Sweden)

    Débora Leonardo dos Santos

    2010-08-01

    Full Text Available Tabebuia serratifolia, Tabebuia chrysotricha and Tabebuia roseo-alba (Bignoniaceae, are an important ornamental and wood trees in Brasil. The effects of light and temperature in the  germination of Tabebuia serratifolia, Tabebuia chrysotricha and Tabebuia roseo-alba seeds were studied in the present work. The results indicated that the species present light insensitive seeds the and optimum temperature was between 20° and 30°C, the maximum temperature between 35° and 40°C and minimal temperature between 10° and 15°C for Tabebuia chrysotricha and Tabebuia roseo-alba and below 10°C for Tabebuia serratifolia.

  19. Competency-based curricular design to encourage significant learning.

    Science.gov (United States)

    Hurtubise, Larry; Roman, Brenda

    2014-07-01

    Most significant learning (SL) experiences produce long-lasting learning experiences that meaningfully change the learner's thinking, feeling, and/or behavior. Most significant teaching experiences involve strong connections with the learner and recognition that the learner felt changed by the teaching effort. L. Dee Fink in Creating Significant Learning Experiences: An Integrated Approach to Designing College Course defines six kinds of learning goals: Foundational Knowledge, Application, Integration, Human Dimension, Caring, and Learning to Learn. SL occurs when learning experiences promote interaction between the different kinds of goals, for example, acquiring knowledge alone is not enough, but when paired with a learning experience, such as an effective patient experience as in Caring, then significant (and lasting) learning occurs. To promote SL, backward design principles that start with clearly defined learning goals and the context of the situation of the learner are particularly effective. Emphasis on defining assessment methods prior to developing teaching/learning activities is the key: this ensures that assessment (where the learner should be at the end of the educational activity/process) drives instruction and that assessment and learning/instruction are tightly linked so that assessment measures a defined outcome (competency) of the learner. Employing backward design and the AAMC's MedBiquitous standard vocabulary for medical education can help to ensure that curricular design and redesign efforts effectively enhance educational program quality and efficacy, leading to improved patient care. Such methods can promote successful careers in health care for learners through development of self-directed learning skills and active learning, in ways that help learners become fully committed to lifelong learning and continuous professional development.

  20. Questioning collectives and agencies: a commentary on curricular choices

    Science.gov (United States)

    Arnold, Jenny

    2015-06-01

    This commentary explores theoretical alternatives for viewing the problem identified by Volny Fages and Virginie Albe in their article entitled Social issues in nanoscience and nanotechnology Master's degrees: The socio-political stakes of curricular choices. An approach to social research is suggested that would render visible the associations maintaining the states of affairs depicted by Fages and Albe. In their research, Fages and Albe identified conceptions of the relationship between scientific endeavour and social concerns to be at the root of "choices" made by coordinators of Masters programs in nano science and technology in universities selected for their study. Albe and Fages, insiders in the sense that they take responsibility for a particular program within one such course, convey their belief that, "future scientists need to identify, accept and take on board the social responsibilities linked to their own practice of science, and to work collectively for a more democratic division of power regarding socio-technical choices". However, many of the Master's programs reviewed in their research were reported as providing limited opportunities for their students to critically engage with social aspects of scientific work. This commentary questions the notion of "choices" used in their research and proposes Actor-Network Theory as a theoretical framework open to the existence of various human and non-human agencies at work when a "choice" is made. The aim of the commentary is to further Fages and Albe's agenda by calling for understanding and ultimately a reassembling of the state of affairs in a way that would be acceptable to those invested.

  1. Antidiabetic Effects of Aqueous Infusions of Artemisia herba-alba and Ajuga iva in Alloxan-Induced Diabetic Rats.

    Science.gov (United States)

    Boudjelal, Amel; Siracusa, Laura; Henchiri, Cherifa; Sarri, Madani; Abderrahim, Benkhaled; Baali, Faiza; Ruberto, Giuseppe

    2015-06-01

    The aqueous infusions of the aerial parts of Artemisia herba-alba Asso and Ajuga iva Schreber, prepared in accordance with the traditional procedure used in the local folk medicine, have been analysed for their composition and content of phytochemical constituents and examined for their antidiabetic effectiveness in alloxan-induced diabetic rats. Oral administration of A. herba-alba and A. iva infusions was studied in normal and alloxan-induced diabetic rats, which were randomly divided into nine groups, each group consisting of six animals. The drug preparations (100, 200, and 300 mg/kg b. w.) of each plant were given orally to the rats of each group twice daily for 15 days. Compositional analysis of the aqueous infusions revealed the presence of several polyphenols as main components. A. herba-alba infusion was characterised by mono- and di-cinnamoylquinic acids, with 5-caffeoylquinic (chlorogenic) acid being the main compound, followed by 3,5-dicaffeoylquinic acid. Vicenin-2 (apigenin 6,8-di-C-glucoside) appeared to be the most abundant among flavonoids. On the other hand, A. iva showed the exclusive presence of flavonoids, with the flavanone naringin present in relatively high levels together with several apigenin (flavone) derivatives. Oral administration of 300 mg/kg b. w. of the aqueous infusions of A. herba-alba and A. iva exhibited a significant reduction in blood glucose content, showing a much more efficient antidiabetic activity compared to glibenclamide, the oral hypoglycaemic agent used as a positive control in this study. These results suggest that A. herba-alba and A. iva possess significant antidiabetic activity, as they were able to improve the biochemical damage in alloxan-induced diabetes in rats.

  2. Pre-sedation and transport of Rhamdia quelen in water containing essential oil of Lippia alba: metabolic and physiological responses.

    Science.gov (United States)

    Becker, Alexssandro G; Parodi, Thaylise V; Zeppenfeld, Carla C; Salbego, Joseânia; Cunha, Mauro A; Heldwein, Clarissa G; Loro, Vania L; Heinzmann, Berta M; Baldisserotto, Bernardo

    2016-02-01

    The effects of transporting silver catfish (Rhamdia quelen) for 6 h in plastic bags containing 0 (control), 30 or 40 µL/L of essential oil (EO) from Lippia alba leaves were investigated. Prior to transport, the fish in the two experimental groups were sedated with 200 µL/L of EO for 3 min. After transport, dissolved oxygen, carbon dioxide, alkalinity, water hardness, pH, temperature and un-ionized ammonia levels in the transport water did not differ significantly among the groups. However, total ammonia nitrogen levels and net Na(+), Cl(-) and K(+) effluxes were significantly lower in the groups transported with EO of L. alba than those in the control group. PvO2, PvCO2 and HCO3(-) were higher after transporting fish in 40 µL/L of EO of L. alba, but there were no significant differences between groups regarding blood pH or hematocrit. Cortisol levels were significantly higher in fish transported in 30 µL/L of EO of L. alba compared to those of the control group. The metabolic parameters (glycogen, lactate, total amino acid, total ammonia and total protein) showed different responses after adding EO to the transport water. In conclusion, while the EO of L. alba is recommended for fish transport in the conditions tested in the present study because it was effective in reducing waterborne total ammonia levels and net ion loss, the higher hepatic oxidative stress in this species with the same EO concentrations reported by a previous study led us to conclude that the 10-20 µL/L concentration range of EO and lack of pre-sedation before transport are more effective.

  3. Morteros de albañilería con escombros de demolición

    Directory of Open Access Journals (Sweden)

    Álvarez Cabrera, J. L.

    1997-06-01

    Full Text Available The possibility of recycling construction rubble, its technical and economic effectiveness, and the social and ecological impact they provide for our society is the reason and the starting point for an optimal exploitation of this aggregate in the manufacture of masonry mortar, since it has the same inherent properties as those obtained from the quarry aggregates, described in the Cuban standard NC52-79:93. The work consists in the preparation and study of masonry mortars using recycled aggregates -demolition product-. Four volumetric dosages were prepared (1:4; 1:5; 1:6 y 1:8, which were submitted to physical and mechanical tests at 7, 28 and 60 days, adherence resistance at 28 days, and capillary absorption, obtaining similar results to those.

    La posibilidad real del reciclaje de escombros, su efectividad técnica, económica, y el impacto social y ecológico que proporciona a la sociedad, es nuestro punto de partida para lograr un óptimo aprovechamiento de este árido como futuro agregado fundamental en la obtención de un mortero de albañilería, capaz de tener como propiedades aquellas intrínsecas de los propios morteros obtenidos a partir de áridos de cantera y recogidos en la norma cubana NC52-79:93. El trabajo consiste en la preparación y estudio de morteros de albañilería empleando árido reciclado -producto de demolición- como agregado. Se prepararon 4 dosificaciones volumétricas (1:4; 1:5; 1:6 y 1:8, las cuales fueron sometidas a ensayos físico-mecánicos al, 28 y 60 días, resistencia a la adherencia a 28 días, y absorción capilar, obteniéndose resultados comparables con los morteros de albañilería tradicionales.

  4. Toxicity Of The Essential Oil Of The Cytral Chemotype Of Lippia Alba (Mill. N. E. Brown Toxicidad del aceite esencial de Lippia alba (Mill. N. E. Brown quimiotipo citral

    Directory of Open Access Journals (Sweden)

    Jesús Olivero-Verbel

    2010-06-01

    Full Text Available The essential oil (EO of Lippia alba (Mill. N. E. Brown (Verbenaceae has been traditionally used to treat several diseases. In this study, the acute toxic effects of the citral chemotype of L. alba EO were evaluated in mice. Animals were treated via intraperitoneal receiving the L. alba essential oil at doses between 50 and 2500 mg/kg, and the control group received sesame oil (vehicle. The EO induced dose-dependent neurotoxic effects at doses greater than 1000 mg/kg, including decreased locomotion, motor skills and muscle strength, hypotonia, dyspnea, kyphosis and convulsions. The EO was lethal at a dose of 2500 mg/kg. Animals receiving 1000 mg/kg were euthanized at the end of the treatment period and their blood and livers were collected for analysis. Mice exposed to L. alba EO presented signifcantly greater plasma alanine aminotransferase (ALT activities than the control group. Liver histological changes included mild infammation, in particular, an increase in nuclear size. Compared to vehicle control group, changes in expression for selected genes were signifcant for FABP5, a fatty acid transport related gene. In summary, the intraperitoneal administration of L. alba EO (citral chemotype causes neurological damage in mice at doses equal or greater than 1500 mg/kg, whereas at 1000 mg/kg, it generates mild liver damage. Therefore, the systemic use of this EO raises concerns about its safety.El aceite esencial (AE de Lippia alba (Mill. NE Brown (Verbenaceae ha sido utilizado tradicionalmente para tratar varias enfermedades. En este estudio, los efectos tóxicos agudos del AE de Lippia alba quimiotipo citral fueron evaluados en ratones. Los animales fueron tratados por vía intraperitoneal recibiendo el AE en dosis entre 50 y 2500 mg/kg de peso, y el grupo control aceite de sésamo (vehículo. Dosis superiores a 1000 mg/kg del AE mostraron efectos neurotóxicos incluyendo disminución de la locomoción e hipotonía, disnea, cifosis y

  5. Norma ISO 690:2010 [Doctorado. 2015

    OpenAIRE

    Biblioteca Universitaria

    2015-01-01

    Mediante el estudio de este tema aprenderás a gestionar adecuadamente tu bibliografía adquiriendo una serie de competencias que te permitirán: - Actuar de manera responsable, ética y legal en el uso de la información empleada para realizar un trabajo académico. - Identificar el estilo de cita más adecuado para cada disciplina científica. - Identificar correctamente y elaborar las referencias bibliográficas correspondientes a distintos tipos de documentos, de acuerdo con la norma ISO 690:2010....

  6. Norma ISO 690:2010 [Doctorado. 2014

    OpenAIRE

    Biblioteca Universitaria

    2014-01-01

    Mediante el estudio de este tema aprenderás a gestionar adecuadamente tu bibliografía adquiriendo una serie de competencias que te permitirán: - Actuar de manera responsable, ética y legal en el uso de la información empleada para realizar un trabajo académico. - Identificar el estilo de cita más adecuado para cada disciplina científica. - Identificar correctamente y elaborar las referencias bibliográficas correspondientes a distintos tipos de documentos, de acuerdo con la norma ISO 690:2010....

  7. A Process for Curricular Improvement Based on Evaluation of Student Performance on Milestone Examinations

    Science.gov (United States)

    Hylton, Ann C.; Justice, Michael

    2016-01-01

    Objective. To identify and address areas for curricular improvement by evaluating student achievement of expected learning outcomes and competencies on annual milestone examinations. Design. Students were tested each professional year with a comprehensive milestone examination designed to evaluate student achievement of learning outcomes and professional competencies using a combination of multiple-choice questions, standardized patient assessments (SPAs), and objective structured clinical examination (OSCE) questions. Assessment. Based on student performance on milestone examinations, curricular changes were instituted, including an increased emphasis on graded comprehensive cases, OSCE skills days, and use of patient simulation in lecture and laboratory courses. After making these changes, significant improvements were observed in second and third-year pharmacy students’ grades for the therapeutic case and physician interaction/errors and omissions components of the milestone examinations. Conclusion. Results from milestone examinations can be used to identify specific areas in which curricular improvements are needed to foster student achievement of learning outcomes and professional competencies. PMID:28090108

  8. INNOVACION CURRICULAR EN TURISMO: UN CAMPO DE ESTUDIO Y REFERENTES PARA LA FORMACIÓN UNIVERSITARIA

    Directory of Open Access Journals (Sweden)

    Lucía M. Collado Medina

    2013-01-01

    Full Text Available El artículo presenta un panorama de la investigación curricular en turismo reportada en México y otros países, principalmente latinoamericanos. Se definen tendencias, impactos, alcances, pautas de problemáticas emergentes, y referentes para aclarar enfoques y modelos de la formación profesional e innovación curricular de este campo. Con base en el método de mapeo se seleccionaron y valoraron las fuentes que sustentan este estudio, mediante las cuales se plantean los retos para la construcción de modelos curriculares innovadores. Se vislumbran nuevos paradigmas inter y transdisciplinarios para abordar curricularmente el caso del turismo. Con respecto a lo anterior, se concluye tomar en cuenta supuestos epistemológicos congruentes con la complejidad y la incertidumbre que subyacen a los modelos de formación en turismo, pertinentes al entorno social y humano.

  9. El diseño curricular y la planeación estrategica

    OpenAIRE

    Juan Silvestre Aranda Barradas; Edgar Salgado Manjarrez

    2005-01-01

    El diseño curricular es un proceso que deben efectuar las instituciones de educación superior con cierta frecuencia a fin de ampliar o actualizar su oferta educativa. El resultado del diseño curricular es el documento donde se explicitan la organización, operación y evaluación integral de la formación propuesta, esto es, el currículo. La fase de planeación en el diseño curricular es de suma importancia porque de ésta depende la correcta operación, o en todo caso la operación reduciendo riesgo...

  10. Los programas de diversificación curricular desde la transversalidad

    Directory of Open Access Journals (Sweden)

    María Ángeles PASCUAL SEVILLANO

    2009-11-01

    Full Text Available RESUMEN: La enseñanza en la diversidad requiere ante todo de una innovación curricular que apueste por un proceso y contexto educativo que se adapte al individuo. Introducir en la enseñanza los intereses provocados de la propuesta de los ejes transversales no significa desplazar las materias curriculares, sino diseñar los objetivos y contenidos propios de las áreas curriculares para que puedan adquirirse y desarrollarse desde la transversalidad, permitiendo así un mayor acercamiento y contextualización con la realidades cada estudiante y con los conflictos y problemas del mundo contemporáneo y, a la vez dotándolos de un valor funcional inmediato respecto a la comprensión y posible transformación de esa realidad y de esos conflictos. En este sentido los aspectos que tratan de incorporarse no son algo añadido, pero si novedoso desde el momento en que se introduce una nueva perspectiva, y se evita el riesgo, a veces tan mencionado, de que la transversalidad aparezca sutilmente desdibujada. Los ejes transversales bajo este nuevo planteamiento implicarán una importante transformación de las áreas curriculares de acuerdo con las expectativas de los tiempos presentes y la adecuación a las posibilidades de comprensión del alumnado. Esto será así, si los enfoques transversales, que constituyen el centro de las actuales preocupaciones sociales de las áreas curriculares, se convierten en el núcleo en torno a los cuales gira la programación de las áreas curriculares, las cuales se convertirán entonces en los instrumentos necesarios para la consecución de las finalidades deseadas.ABSTRACT: The Education in the diversity requires of a curricular innovation that bet on a process and educational context that is adapted to the individual. To introduce in the teaching the provoked interest of the proposal of the transverse shafts does not mean to displace the curricular matters, and yes to design the objectives and own contents of the

  11. Concentrações de BAP sobre a proliferação in vitro de brotos de Lippia alba [(Mill.N.E.Brown] BAP concentrations on in vitro proliferation of Lippia alba [(Mill. N.E.Brown] shoots

    Directory of Open Access Journals (Sweden)

    S.A. Asmar

    2012-01-01

    Full Text Available Lippia alba é uma planta de origem brasileira, pertencente à família Verbenaceae. É conhecida por combater a insônia e a asma, além de possuir ação anticonvulsivante e antifúngica. A micropropagação tem sido utilizada para multiplicação de várias espécies com propriedades medicinais, e o BAP é a citocinina sintética mais utilizada para a multiplicação in vitro. O objetivo deste trabalho foi estabelecer a concentração adequada de BAP na multiplicação in vitro de L. alba. Explantes constituídos de segmentos nodais provenientes de plântulas já estabelecidas in vitro com aproximadamente 0,5 cm foram inoculados em meio MS, suplementado com 0,0; 0,5; 1,0 e 1,5 mg L-1 de BAP em adição de 30 g L-1 de sacarose. A utilização de 1,5 mg L-1 de BAP promove a multiplicação in vitro de L. alba. A ausência deste regulador propicia maior número de folhas e o uso na concentração de 0,5 mg L-1 aumentou as massas fresca e seca de parte aérea nesta espécie.Lippia alba is a Brazilian plant, belonging to the Verbenaceae family. It is known to combat insomnia and asthma, also has antifungal and anticonvulsant actions. Micropropagation has been used for propagation of various species with medicinal properties, and BAP is the most widely used synthetic cytokinin for in vitro multiplication. The aim of this study was to determine the appropriate concentration of BAP on in vitro multiplication of L. alba. Explants consisting of nodal segments from seedlings already established in vitro with approximately 0.5 cm were inoculated on MS medium supplemented with 0; 0.5; 1.0 and 1.5 mg L-1 of BAP and 30 g L-1 of sucrose. The use of 1.5 mg L-1 of BAP promotes the in vitro multiplication of L. alba. The absence of this regulator provides a greater number of leaves and its use at the concentration of 0.5 mg L-1 increased shoots' fresh and dry weights in this specie.

  12. New methodologies for the extraction and fractionation of bioactive carbohydrates from mulberry (Morus alba) leaves.

    Science.gov (United States)

    Rodríguez-Sánchez, Sonia; Ruiz-Aceituno, Laura; Sanz, María L; Soria, Ana C

    2013-05-15

    Pressurized liquid extraction (PLE) was applied for the first time to extract bioactive low molecular weight carbohydrates (iminosugars and inositols) from mulberry ( Morus alba ) leaves. Under optimized conditions, PLE provided a similar yield to the conventional process used to extract these bioactives, but in less time (5 vs 90 min). To remove carbohydrates that interfere with the bioactivity of iminosugars from PLE extracts, two fractionation treatments were evaluated: yeast ( Saccharomyces cerevisiae ) incubation and cation-exchange chromatography (CEC). Both methods allowed complete removal of major soluble carbohydrates (fructose, glucose, galactose, and sucrose), without affecting the content of mulberry bioactives. As an advantage over CEC, the yeast treatment preserves bioactive inositols, and it is an affordable methodology that employs food grade solvents. This work found PLE followed by yeast treatment to be an easily scalable and automatable procedure that can be implemented in the food industry.

  13. Variability of physiological and growth characteristics of white willow (Salix alba L. clones

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    Orlović Saša

    2006-01-01

    Full Text Available The samples from field experiment on five clones of white willow (Salix alba L. in the adult phase, was investigated as follows: net photosynthesis and dark respiration, content of photosynthetic pigments (chlorophylls a, b and carotenoids, number and size of stornata and elements of growth (tree diameters and heights. The aim of the research is to determine if there are any relations between these physiological characters and the elements of growth, i.e. if any of them can be utilized in the early selection for growth vigor. The results show that all the characters are characterized by low coefficients of variation, statistically highly significant differences and high coefficients of heritability in a broad sense. As for the net of photosynthesis, the number of stornata on the adaxial and abaxial sides of the leaf are in high correlation with the elements of growth, which indicates that they can be used in the early selection for growth vigor.

  14. Screening of Antimicrobial activity of Aqueous extracts of Leaves, Flower and Stem of Eclipta alba

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    Prabhsimran Singh Sandhu

    2012-12-01

    Full Text Available Plants are the oldest source of pharmacologically active compounds, and have provided humankind with many medically useful compounds for centuries. In this study aqueous extract of leaves, stem and flower of Eclipta alba were tested for antimicrobial activity against Escherichia coli (ATCC25923,Enterobacter cloacae (ATCC10699, Enterococcus faecalis (ATCC10741, Proteus vulgaris (ATCC12454 Staphylococcus aureus (ATCC25923 Klebsiella pneumonia (ATCC15380 and Staphylococcus. Saprophyticus (ATCC35552 It was shown that leaves extract effective against E. cloacae & K .pneumoniae but not against others, while aquous extract of stem shown good antitimicrobial effect against E. cloacae, E. faecali, K. pneumoniae and S. saprophyticus but E. coli, P. vulgaris, S. aureus were found resistant and The aqueous extract of flower shown reliabe ZOI against P.vulgaris ,S.aureus and S.saprophyticus while resistant against all other microbes.

  15. UV-B induced changes in the secondary metabolites of Morus alba L. leaves.

    Science.gov (United States)

    Gu, Xi-Da; Sun, Ming-Yao; Zhang, Lin; Fu, Hong-Wei; Cui, Lei; Chen, Run-Ze; Zhang, Da-Wei; Tian, Jing-Kui

    2010-04-27

    Ultraviolet-B (UV-B) radiation is harmful to plants and human beings. Many secondary metabolites, like flavonoids, alkaloids, and lignin, are UV-B absorbing compounds, which can protect the genetic material of plants. Furthermore, they are active components of herbal drugs. UV-B radiation can activate the self-protective secondary metabolism system. The results of this paper provide a method to induce bioactive secondary metabolites from mulberry leaves (Morus alba L.) by UV-B irradiation in vitro. Five significantly different chromatographic peaks were found by HPLC fingerprint after induction, from which two active compounds were identified: One was chalcomoracin, a natural Diels-Alder type adduct with antibacterial activity; the other one was moracin N, which is a precursor of chalcomoracin. Their contents were 0.818 mg/g and 0.352 mg/g by dry weight, respectively.

  16. UV-B Induced Changes in the Secondary Metabolites of Morus alba L. Leaves

    Directory of Open Access Journals (Sweden)

    Da-Wei Zhang

    2010-04-01

    Full Text Available Ultraviolet-B (UV-B radiation is harmful to plants and human beings. Many secondary metabolites, like flavonoids, alkaloids, and lignin, are UV-B absorbing compounds, which can protect the genetic material of plants. Furthermore, they are active components of herbal drugs. UV-B radiation can activate the self-protective secondary metabolism system. The results of this paper provide a method to induce bioactive secondary metabolites from mulberry leaves (Morus alba L. by UV-B irradiation in vitro. Five significantly different chromatographic peaks were found by HPLC fingerprint after induction, from which two active compounds were identified: One was chalcomoracin, a natural Diels-Alder type adduct with antibacterial activity; the other one was moracin N, which is a precursor of chalcomoracin. Their contents were 0.818 mg/g and 0.352 mg/g by dry weight, respectively.

  17. Bio-assay guided isolation of alpha-glucosidase inhibitory constituents from Eclipta alba.

    Science.gov (United States)

    Kumar, Deepak; Gaonkar, Raghuvir H; Ghosh, Rina; Pal, Bikas C

    2012-08-01

    Eclipta alba (L.) Hassk is used traditionally in diabetes mellitus in India and the plant extract is reported to possess anti-diabetic activity. A bioactivity-guided isolation approach based on alpha-glucosidase inhibition was used to identify the constituents contributing towards the inhibition of the enzyme and probably contributing towards its anti-diabetic activity. Four echinocystic acid glycosides were thus isolated, of which eclalbasaponin VI, isolated from the n-butanol fraction, was found to be the most potent (IC50 54.2 +/- 1.3 microM). The compound is an uncompetitive type of inhibitor with Ki 26.1 microM. A quantitative estimation of the constituents was established using RP-HPLC.

  18. Mycocoenology in Abies alba Miller woods of central-southern Tuscany (Italy

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    Angela Laganà

    2014-01-01

    Full Text Available Numerous reports indicate that fir woods in central and northern Europe have recently been damaged by increasing pollution. It has been demonstrated that fungi can be good bioindicators of forest health status. In polluted areas the production of fruit bodies generally declines and the fungal biodiversity, especially of symbiotic species, is reduced. Here we report the results of a survey of the fungal and plant communities in woods of Abies alba Miller in central-southern Tuscany, already studied in the past. Certain changes were observed in the study areas, but they seem more likely to be due to other factors than pollution, such as the weather conditions, the age and natural evolution of the forests towards their climax.

  19. Impact du stress hydrique sur le fonctionnement hydraulique foliaire du peuplier Populus tremula x alba

    OpenAIRE

    Daaboul, Philippe

    2015-01-01

    Afin d’aborder l’impact du stress hydrique sur le fonctionnement hydraulique foliaire, des plants de Populus tremula x alba ont été soumis à un stress hydrique modéré ou sévère pendant une semaine par ajout de PEG dans la solution nutritive. La mesure de paramètres écophysiologiques et moléculaires tissus spécifiques a permis de dégager plusieurs tendances sur la caractérisation de l’influence du stress. Les deux types de stress n’ont que peu d’impact sur la croissance et la capacité de synth...

  20. Involvement of histaminergic system in the anxiolytic-like activities of Morus alba leaves in mice.

    Science.gov (United States)

    Lee, Seungheon; Kim, Dong Hyun; Lee, Ji Hye; Ko, Eun Seong; Oh, Won Bo; Seo, Yong Taek; Jang, Young Pyo; Ryu, Jong Hoon; Jung, Ji Wook

    2013-01-01

    The aim of this study was to identify the effects of 85% methanolic extract of Morus alba leaves (EMA), which is a traditional herb, in mice. The effects of EMA on the anxiolytic-like behaviour were studied using the elevated plus maze (EPM) and hole-board test. To elucidate the mode of action of the anxiolytic-like effects of EMA, the mice were subjected to the co-administration of EMA (200 mg/kg, per os (p.o.)) and either antagonist. EMA (at 200 or 400 mg/kg) significantly increased the percentages of time-spent in the open arms and entries into the open arms of the EPM versus vehicle-treated control group (phistaminergic system in central nerve system.

  1. Essential oil of Lippia alba in the transport of Nile tilapia

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    Janis Cumming Hohlenwerger

    Full Text Available ABSTRACT: This study aimed to examine the action of the essential oil of Lippia alba (EOLA in the stress response for transport of Nile tilapia Oreochromis niloticus . The fish were transported into three treatments (in triplicate: control, 10 and 20 µL L-1 EOLA, with loading density of 15 fish/plastic bags for 8h. Plasma glucose levels were significantly decreased in fish exposed to 20µL L-1 EOLA in comparison with the control group and fish exposed to 10µL L-1 EOLA, but the plasma cortisol, lactate and paraoxonase levels were similar. Un-ionized ammonia and ventilatory rate demonstrated a significant reduction in the treatments with the use of EOLA. In conclusion the use of 20µL L-1 EOLA is indicated for Nile tilapia transport.

  2. The use of the white poplar (Populus alba L.) biomass as fuel

    Institute of Scientific and Technical Information of China (English)

    Tatiana Griu; Aurel Lunguleasa

    2016-01-01

    We determined the calorific value of white poplar (Populus alba L.) woody biomass to use it as fire-wood. The value of 19.133 MJ kg-1 obtained experimen-tally shows that the white poplar can be quite successfully used as firewood. Being of a lower quality in comparison with usual beech firewood, the white poplar has similar calorific value. The white poplar has a calorific density of 30.7%lower than that of current firewood. That is why the price of this firewood from white poplar is lower accord-ingly. Also, the prognosis of calorific value on the basis of the main chemical elements, being very close to the experimental value (?2.6%), indicates an appropriate value can be achieved to be used for investigation with the chemical element analysis.

  3. Neutralization of local and systemic toxicity of Daboia russelii venom by Morus alba plant leaf extract.

    Science.gov (United States)

    Chandrashekara, K T; Nagaraju, S; Nandini, S Usha; Kemparaju, K

    2009-08-01

    Antivenom therapy is the current best therapy available for the treatment of fatal snake envenomation. However, the antivenom offers less or no protection against local effects such as extensive edema, hemorrhage, dermo-, myonecrosis and inflammation at the envenomed region. Viperidae snakes are highly known for their violent local effects and such effects have been commonly treated with plant extracts without any scientific validation in rural India. In this investigation Morus alba plant leaf extract has been studied against the Indian Vipera/Daboia russelii venom induced local and systemic effects. The extract completely abolished the in vitro proteolytic and hyaluronolytic activities of the venom. Edema, hemorrhage and myonecrotic activities were also neutralized efficiently. In addition, the extract partially inhibited the pro-coagulant activity and completely abolished the degradation of Aalpha chain of human fibrinogen. Thus, the extract processes potent antisnake venom property, especially against the local and systemic effects of Daboia russelii venom.

  4. Pedestrian Zones As Important Urban Strategies in Redeveloping the Community - Case Study: Alba Iulia Borough Park

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    Oana Elena BLAGA

    2013-02-01

    Full Text Available The pedestrian zone issue is by far an important matter in the context of urban regeneration. Cities which adopted this strategy – the pedestrian zones – have recorded better urban attitudes regarding the urban environment, a continuous growth of the urban quality, an improved urban ecosystem  and continuous attractiveness for investment and  tourism. This article explores the evolution of the pedestrian zones as ideas in utopian urban models in the early 1900 and later as efficient environmental friendly strategies adopted by cities. After identifying the path this concept followed, from a simple idea to an important strategy of urban development, the paper focuses on the major characteristics and benefits of the pedestrian precincts. Next, the article focuses on the newest pedestrian zone in one of the Romanian cities, Alba Iulia and it tries to identify the types of impact this area has so far on the community and entire city.

  5. Antidiabetic and antioxidant effects and phytochemicals of mulberry fruit (Morus alba L.) polyphenol enhanced extract.

    Science.gov (United States)

    Wang, Yihai; Xiang, Limin; Wang, Chunhua; Tang, Chao; He, Xiangjiu

    2013-01-01

    The antidiabetic and antioxidant activities of the ethyl acetate-soluble extract (MFE) of mulberry fruit (Morus alba L.) were investigated. In vitro, MFE showed potent α-glucosidase inhibitory activity and radical-scavenging activities against DPPH and superoxide anion radicals. In vivo, MFE could significantly decrease fasting blood glucose (FBG) and glycosylated serum protein (GSP), and increase antioxidant enzymatic activities (SOD, CAT, GSH-Px) in streptozotocin (STZ)-induced diabetic mice. Bioactivity-guided fractionation of the MFE led to the isolation of 25 phenolic compounds, and their structures were identified on the basis of MS and NMR data. All the 25 compounds were isolated from mulberry fruit for the first time. Also, the α-glucosidase inhibitory activity and antioxidant activity of the phenolics were evaluated. Potent α-glucosidase inhibitory and radical-scavenging activities of these phenolics suggested that they may be partially responsible for the antidiabetic and antioxidant activities of mulberry fruit.

  6. Antidiabetic and antioxidant effects and phytochemicals of mulberry fruit (Morus alba L. polyphenol enhanced extract.

    Directory of Open Access Journals (Sweden)

    Yihai Wang

    Full Text Available The antidiabetic and antioxidant activities of the ethyl acetate-soluble extract (MFE of mulberry fruit (Morus alba L. were investigated. In vitro, MFE showed potent α-glucosidase inhibitory activity and radical-scavenging activities against DPPH and superoxide anion radicals. In vivo, MFE could significantly decrease fasting blood glucose (FBG and glycosylated serum protein (GSP, and increase antioxidant enzymatic activities (SOD, CAT, GSH-Px in streptozotocin (STZ-induced diabetic mice. Bioactivity-guided fractionation of the MFE led to the isolation of 25 phenolic compounds, and their structures were identified on the basis of MS and NMR data. All the 25 compounds were isolated from mulberry fruit for the first time. Also, the α-glucosidase inhibitory activity and antioxidant activity of the phenolics were evaluated. Potent α-glucosidase inhibitory and radical-scavenging activities of these phenolics suggested that they may be partially responsible for the antidiabetic and antioxidant activities of mulberry fruit.

  7. THERMO-VACUUM MODIFICATION OF SPRUCE (PICEA ABIES KARST. AND FIR (ABIES ALBA MILL. WOOD

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    Ottaviano Allegretti,

    2012-06-01

    Full Text Available The study presents results of the characterization of Norway spruce (Picea abies Karst. and fir (Abies alba Mill. wood thermally modified by TERMOVUOTO® technology at temperatures in the range of 160 to 220°C in vacuum conditions. Sixteen thermo-vacuum treatment tests were carried out using a pilot laboratory unit on 30-mm-thick spruce and fir boards in various combinations of the process parameters, i.e. temperature (T, duration (t, and pressure (p. The treated material was characterized to reveal the changes of the physical-mechanical properties including color and durability. The treated wood showed an improved performance with relation to the dimensional stability and durability. The measured mechanical properties did not show any significant decrease. Analytical models, based on the existing correlations between wood properties and process parameters, were assessed, thus allowing the control of the process.

  8. Optimization of Extraction Conditions and Development of a Sensitive HPTLC Method for Estimation of Wedelolactone in different extracts of Eclipta alba

    Directory of Open Access Journals (Sweden)

    Kulkarni Savita

    2011-01-01

    Full Text Available Eclipta alba has been used in Ayurvedic medicine for treatment of various ailments. An attempt has been made to optimize different extraction conditions for Eclipta alba. Further an accurate, precise, reproducible and sensitive accurate, precise and reproducible (HPTLC method has been developed for the estimation of Wedelolactone in Eclipta alba. An attempt has been made to quantify wedelolactone in various extracts by HPTLC method. Precoated aluminum silica gel F plates were used as stationary phase and toluene: ethyl acetate (9:1 was used as mobile phase. This system was found to give compact spots for wedelolactone (RF value of 0.30 ± 0. 3 with a linearity range of 1 to 80 µg per spot. The proposed method was applied to evaluate efficiency of different methods of extraction i.e. percolation, maceration, hot solvent extraction (Soxhlet apparatus, supercritical fluid extraction, microwave, orbital shaker bath and sonication method for extraction of wedelolactone from Eclipta alba.

  9. Maurits Ebben, Margriet Lacy-Bruijn, and Rolof van Hövell tot Westerflier (eds., Alba: General and Servant to the Crown

    Directory of Open Access Journals (Sweden)

    José Eloy Hortal Muñoz

    2015-12-01

    Full Text Available Maurits Ebben, Margriet Lacy-Bruijn, and Rolof van Hövell tot Westerflier (eds., Alba:  General and Servant to the Crown (Rotterdam: Karwansaray publishers, 2013, 464 pp., isbn 978 94 90258 08 5.

  10. Lippia alba morphotypes cidreira and melissa exhibit significant differences in leaf characteristics and essential oil profile

    Directory of Open Access Journals (Sweden)

    Caroline N. Jezler

    2013-04-01

    Full Text Available Lippia alba (Mill. N.E. Br. ex Britton & P. Wilson, Verbenaceae, is widely used in traditional Brazilian medicine for the treatment of abdominal distress. The species exhibits considerable chemical and morphological diversity, and various chemotypes have been characterized. A comparative study of L. alba, has been carried out of the morphoanatomical characteristics of the leaves and the profiles of the essential oils of the morphotypes cidreira and melissa grown in the Medicinal Plant Garden of the Universidade Estadual de Santa Cruz, Ilhéus, Bahia, Brazil. The mean plant height of cidreira was 1.80 m and the stems and branches were fairly erect, while melissa plants were smaller (1.60 m and presented prostrate stems and branches. Although the leaf of the morphotypes look were similar, the mean values of length, width and area of the leaves of cidreira (respectively, 7.42 cm, 3.32 cm and 17.31 cm² differed significantly from those of melissa (4.68 cm, 2.35 cm and 7.32 cm2. The morphotypes presented amphistomatic leaves with uniseriate epidermis on both surfaces. The mesophyll was dorsiventral, but in cidreira the palisade parenchyma was biseriate while in melissa it was uniseriate. Simple tector and capitate glandular trichomes were present on the adaxial and abaxial surfaces of the leaf blades of both morphotypes. Six distinct types of glandular trichomes could be distinguished: types I and II were present in both morphotypes, while type III was detected only in cidreira, and types IV to VI were present only in melissa. The two morphotypes also differed with respect to the composition of the essential oil, cidreira produced oil composed mainly of citral, while the oil from melissa was rich in citral, limonene and carvone.

  11. Atividade Antimicrobiana e Citotoxicidade do extrato bruto obtido de Morus Alba L. (Moraceae

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    Camila Bugnotto Pereira

    2012-01-01

    Full Text Available O presente trabalho avaliou a atividade antimicrobiana in vitro do extrato hidroetanólico e frações hexânica, clorofórmica, acetato de etila e butanólica das folhas de Morus alba L. A concentração inibitória mínima (CIM foi determinada frente à Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa, Candida albicans, Aspergillus fumigatus e Prothoteca zophii. As frações que apresentaram melhores respostas para a atividade antimicrobiana foram acetato de etila e clorofórmica com CIM de 256 µg/mL. Não foi possível detectar atividade antimicrobiana para Aspergillus fumigatus em nenhuma das concentrações testadas. A citotoxidade do extrato hidroetanólico foi avaliada através de culturas de células de ovário de hamster chinês (CHO e células do tecido conectivo de camundongo (NCTC clone 929, determinando o índice de citotoxidade (IC50. O IC50 foi de 0,34 mg/mL para as células CHO e 3,24 mg/mL para as células NCTC 929. De modo geral, as frações acetato de etila e clorofórmica das folhas de M. alba L. apresentaram moderada atividade antimicrobiana e o extrato bruto demonstrou ação citotóxica in vitro frente as células CHO e NCTC 929.

  12. Curricular Units: Powerful Tools to Connect the Syllabus with Students’ Needs and Interests

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    Ariza Ariza Aleida

    2004-08-01

    Full Text Available A basic component of any language program is the construction of the curriculum. There is a variety of approaches to curriculum planning and implementation from the technical production perspective to the critical view. The current article emerged from the analysis of the syllabus in a Basic English course in the undergraduate program at Universidad Nacional de Colombia and the design and implementation of a curricular unit. Such unit proved to be a powerful tool to connect what was set in the program, what students needed in terms of language and what they were interested in terms of culture. Key words: Curriculum, Curricular Unit Platform, Constructivism, Teaching- Communicative Language, Task-Based Approach Un componente esencial en un programa de idiomas es la construcción del currículo. Existe una gran variedad de enfoques en términos del diseño y la implementación del currículo; desde una perspectiva reducida a la producción técnica, hasta una visión crítica y transformadora. El presente artículo se gesta a partir tanto del análisis de un programa correspondiente al curso Inglés Básico I en la licenciatura ofrecida por la Universidad Nacional de Colombia, como del diseño y la implementación de una unidad curricular. Dicha unidad curricular se caracterizó por convertirse en una herramienta de conexión entre los contenidos y procedimientos planteados en un programa y las necesidades comunicativas e intereses culturales de los estudiantes. Palabras claves: Currículo, Plataforma Curricular, Unidad Curricular, Constructivismo, Lenguas Extranjeras-Enseñanza Comunicativa, Enfoque basado en Tareas

  13. La construcción de un proyecto curricular para la región Caribe

    Directory of Open Access Journals (Sweden)

    Reynaldo Mora Mora

    2015-10-01

    Full Text Available El propósito de este ensayo es sentar algunas consideraciones teóricas y prácticas para la construcción de un Proyecto Curricular para la Región Caribe colombiana, como un hecho educativo-formativo que apunte hacia los procesos de formación integral de sus habitantes. Se parte del análisis de la consideración que tengan los constructores curriculares con respecto a la perspectiva de la “hibridez cultural” en relación con el contexto de la escuela. Se aborda la posibilidad de que este proyecto sea asumido e implementado como estrategia de formación en las instituciones educativas para que haga parte de cultura organizacional de las instituciones educativas en lo referido a la construcción curricular en el marco que propone la legislación educativa colombiana.AbstractThe purpose of this essay is about the setting of some theoretical and practical considerations in order to build a Curricular Project for the Colombian Caribbean Region, as an educational-formative fact that aims towards the whole formation of its inhabitants. We depart from the analysis of the curricular constructors according to the perspective of the ¨cultural mixture¨ in relation to the school context. We consider the possibility that this project is assumed and implemented as a formative strategy in educational institutions so that they become part of the cultural organization of such institutions as a component of the curricular structure in the framework that the Colombian educational legislation demands.

  14. Fifty Years of Climate Curricular Confusion and Pedagogical Gaps

    Science.gov (United States)

    McCaffrey, M. S.; Buhr, S. S.; Niepold, F.

    2008-12-01

    of science education over the past fifty years, examine various education reform efforts and initiatives aimed at fostering a more science literate society over recent decades, explore a few of the reasons why many students are never exposed to the basics of the climate system, and propose a strategy on how this unfortunate historical curricular and pedagogical gap in climate education can be addressed.

  15. Ciencias contábeis, novos rumos , novas diretrizes curriculares

    Directory of Open Access Journals (Sweden)

    Patricia Dantas Trajano

    2009-09-01

    Full Text Available A nova Lei de Diretrizes e Bases da Educação Nacional, Lei n"9.394, de 20 de dezembro de 1996, em seu artigo 43, enfatiza que a educação superior tem por finalidade precípua a formação de profissionais aptos para inserção no mercado de trabalho e em condições de participarem ativamente do desenvolvimento da sociedade brasileira. Prevê, ainda, o incentivo a pesquisa, a educação continuada, assim como a promoção da divulgação de conhecimentos culturais, científicos e técnicos que constituam patrimônio da humanidade. O inciso II do artigo 53 da mesma Lei concede autonomia as Instituições de Ensino Superior (IES para "fixar os currículos dos seus cursos e programas, observadas as diretrizes gerais pertinentes", o que oferece as IES uma maior flexibilidade na elaboração de seu currículo pleno. A Resolução n2 03/92, do Conselho Federal de Educação, fixa, ate o momento, os mínimos de conteúdo e de duração do curso de graduação em Ciências Contábeis vigentes no pals. Estabelece que o currículo pleno das IES deva definir o perfil profissional a ser formado, em função das atribuições legais que lhe serão conferidas, das peculiaridades e necessidades da região em que as IES se encontram, de suas naturezas e características próprias. O currículo pleno deve ser dividido por disciplinas ou outras atividades curriculares obrigatórias eletivas, nas seguintes categorias de conhecimentos: Categoria I - Conhecimentos de Formação Geral de natureza humanística e social; Categoria II - Conhecimentos de Formação Profissional; Categoria III - Conhecimentos ou Atividades de Formação.

  16. La reestructuración curricular en la Facultad de Ingeniería

    Directory of Open Access Journals (Sweden)

    Guillermo Sánchez Bolívar

    2011-06-01

    Full Text Available A principios del año 1987 en la Facultad de Ingeniería se inición la ejecución del Plan de reestructuración y capacitación curricular, el cual tenía como objetivos, reestructurar los currículos de los programas de pregrado y capacitar a los profesores en aspectos curriculares y pedagógicos que les permitieron mejorar su desempeño como docentes.

  17. Historical trends of the curricular design of the comprehensive discipline in Biology-geography major

    Directory of Open Access Journals (Sweden)

    Renier Mejías Salazar

    2015-09-01

    Full Text Available The paper describes one of the results of the research project “framework enlargement of adult continuing education in environmental education” at the University of Camagüey. A historical study was conducted to account for the trend in curricular design of the comprehensive discipline in Biology-geography major. The study takes into account emerging indicators resulting from the dialectical relation between education-development and personal development and framework construction. These methods lead to identify the trends afore mentioned as a contribution to the theory of curricular design.

  18. The instrumentation of informatics curricular strategy in the subject Algebra I in Mathematic – Physics career.

    Directory of Open Access Journals (Sweden)

    Neisy Rodríguez Morales

    2014-03-01

    Full Text Available The article shows the theoretical elements related with the conception of the curricular strategies and its instrumentation in the process of the student's of the Mathematical career formation - Physics. Examples are presented that demonstrate how to deal with the computer science's curricular strategy from the teaching process - learning of the subject Algebra I in the third year of the career. They give the possibility that the formation process be more effective, they facilitate the systematizing knowledge and abilities as well as the development of the integral general culture in the future professors of Mathematics - Physics.

  19. About Extra-Curricular Activities of The University Graduate – Student’s Viewpoint

    Directory of Open Access Journals (Sweden)

    Ivanova Veronica

    2017-01-01

    Full Text Available Extra-curricular activity of modern youth, including university students, is considered to reduce. Students are thought to demonstrate consumer’s attitude, unwillingness to participate in any social activity, and as a result, the level of soft skills acquired by university students is decreasing. The study of social activity of 100 Bachelor graduates from TPU, including the program “Electrical engineering”, indicated the role of the university in creation of conditions for competence development during training of students according to individual educational trajectory and development of their social (extra-curricular activity.

  20. El significado institucional pretendido sobre el objeto de estudio probabilidad. Un enfoque curricular

    OpenAIRE

    Bustos, María; Rocha, Pedro

    2008-01-01

    El documento para el área de Matemáticas de la serie Lineamientos Curriculares (MEN, 1998) es una directriz legal, conceptual y metodológica para el diseño, gestión y evaluación de los procesos de formación que adelantan los educadores matemáticos colombianos. En este sentido y particularmente en lo que se refiere al pensamiento aleatorio y su desarrollo, el Proyecto Curricular LEBEM9 brinda un espacio de formación para el estudio de los objetos estocásticos. En esta investigación se presenta...

  1. Reducing economic disparities between rural and urban areas through integrated development – Case study: analysis of the turnover of companies in the AIDA Association, Alba County, Romania

    OpenAIRE

    Ionela Gavrilă-Paven; Emil Olteanu; Iulian Bogdan Dobra

    2014-01-01

    This paper presents a local initiative in Romania, Alba County, which tries to establish general guidelines for the sustainable development of a local community that consists of three towns and eight villages. The analysis conducted in this paper is focused on economic activity. The turnover of the companies located in the eleven localities that compose the Intercommunity Development Association – Alba Iulia have been studied. The authors’ objective is to determine the influenc...

  2. Antidepressant-Like Effects of the Ethyl Acetate Soluble Fraction of the Root Bark of Morus alba on the Immobility Behavior of Rats in the Forced Swim Test

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    Dong Wook Lim

    2014-06-01

    Full Text Available In this study, the antidepressant-like effects of Morus alba fractions in rats were investigated in the forced swim test (FST. Male Wistar rats (9-week-old were administered orally the M. alba ethyl acetate (EtOAc 30 and 100 mg/kg and M. alba n-butanol fractions (n-BuOH 30 and 100 mg/kg every day for 7 consecutive days. On day 7, 1 h after the final administration of the fractions, the rats were exposed to the FST. M. alba EtOAc fraction at the dose of 100 mg/kg induced a decrease in immobility behavior (p < 0.01 with a concomitant increase in both climbing (p < 0.05 and swimming (p < 0.05 behaviors when compared with the control group, and M. alba EtOAc fraction at the dose of 100 mg/kg decreased the hypothalamic-pituitary-adrenal (HPA axis response to the stress, as indicated by an attenuated corticosterone response and decreased c-fos immunoreactivity in the hippocampal and hypothalamic paraventricular nucleus (PVN region. These findings demonstrated that M. alba EtOAc fraction have beneficial effects on depressive behaviors and restore both altered c-fos expression and HPA activity.

  3. Antidepressant-like effects of the ethyl acetate soluble fraction of the root bark of Morus alba on the immobility behavior of rats in the forced swim test.

    Science.gov (United States)

    Lim, Dong Wook; Kim, Yun Tai; Park, Ji-Hae; Baek, Nam-In; Han, Daeseok

    2014-06-12

    In this study, the antidepressant-like effects of Morus alba fractions in rats were investigated in the forced swim test (FST). Male Wistar rats (9-week-old) were administered orally the M. alba ethyl acetate (EtOAc 30 and 100 mg/kg) and M. alba n-butanol fractions (n-BuOH 30 and 100 mg/kg) every day for 7 consecutive days. On day 7, 1 h after the final administration of the fractions, the rats were exposed to the FST. M. alba EtOAc fraction at the dose of 100 mg/kg induced a decrease in immobility behavior (p swimming (p < 0.05) behaviors when compared with the control group, and M. alba EtOAc fraction at the dose of 100 mg/kg decreased the hypothalamic-pituitary-adrenal (HPA) axis response to the stress, as indicated by an attenuated corticosterone response and decreased c-fos immunoreactivity in the hippocampal and hypothalamic paraventricular nucleus (PVN) region. These findings demonstrated that M. alba EtOAc fraction have beneficial effects on depressive behaviors and restore both altered c-fos expression and HPA activity.

  4. Effects of drying method and particle size on the antioxidant properties of leaves and teas of Morus alba, Lagerstroemia speciosa and Thunbergia laurifolia

    Directory of Open Access Journals (Sweden)

    Eric Wei Chiang Chan

    2012-01-01

    Full Text Available Antioxidant properties (AOP of leaves and teas of Morus alba L., Lagerstroemia speciosa (L. Pers. and Thunbergia laurifolia Lindl. as affected by microwave, oven and freeze drying were assessed. Total phenolic content (TPC, radical scavenging ability expressed as ascorbic acid equivalent capacity (AEAC and ferric reducing power (FRP were screened using the Folin-Ciocalteu, 2,2-diphenyl-1-picrylhydrazyl (DPPH and potassium ferricyanide assays, respectively. The effects of particle size were also investigated. Microwave drying resulted in enhanced AOP in M. alba and T. laurifolia. Oven drying resulted in declined AOP in T. laurifolia with M. alba and L. speciosa relatively unchanged. Significant increase in AOP was observed in freeze-dried leaves of M. alba with L. speciosa and T. laurifolia showing no change or slight increase. TPC, AEAC and FRP of ground microwave-, oven- and freeze-dried leaves of M. alba extracted with 50% methanol were significantly higher than shredded leaves. For tea infusions extracted with hot water, three categories were recognised, i.e. species with shredded leaves yielding stronger AOP (M. alba, species with ground leaves yielding stronger AOP (L. speciosa, and species with ground and shredded leaves yielding comparable AOP (T. laurifolia.

  5. Creación de materiales multimedia para las siguientes asignaturas: Fundamentos biológicos de la conducta, Neuropsicología, Master universitario en Neuropsicología, Doctorado en Neuropsicología, Master interuniversitario en Psicogerontología; con de depósito en el CRAI del Campus Ciudad Jardín

    OpenAIRE

    2011-01-01

    Con la ayuda recibida y con los materiales y recursos existentes en el CRAI-CAMPUS CIUDAD JARDÍN hemos realizado todas las actividades propuestas en el proyecto. El resultado ha sido la creación de la asignatura de Fundamentos Biológicos de la Conducta, la asignatura de Neuropsicología, asignaturas del Programa Master Oficial en Neuropsicología y asignaturas del Programa de Doctorado en Neuropsicología en Studium. Memoria ID-031. Ayudas de la Universidad de Salamanca para la innovación doc...

  6. Apuntes para una historia del gremio de albañiles de Quito. Ciudad y cultura popular

    Directory of Open Access Journals (Sweden)

    Eduardo Kingman

    2006-11-01

    Full Text Available A partir de las entrevistas realizadas a miembros del gremios de albañiles de Quito, el artículo formula algunas hipótesis sobre la formación de la cultura popular en la primera mitad del siglo XX. El gremio de albañiles se desarrolló en el contexto de una ciudad que pretendía ser moderna pero que, al mismo tiempo, reprodujo el privilegio y determinadas formas de violencia simbólica propias de una sociedad más tradicional. Frente a estas concepciones de privilegio, el estudio explora las nociones de raza popular y de respeto que emergen desde el espacio popular. Paralelamente, el artículo discute algunos problemas metodológicos y éticos relacionados con el método hagiográfico y con la posibilidad de escribir una historia de los trabajadores.

  7. Production and characterization of lipopeptide biosurfactant by a sponge-associated marine actinomycetes Nocardiopsis alba MSA10.

    Science.gov (United States)

    Gandhimathi, R; Seghal Kiran, G; Hema, T A; Selvin, Joseph; Rajeetha Raviji, T; Shanmughapriya, S

    2009-10-01

    A sponge-associated marine actinomycetes Nocardiopsis alba MSA10 was screened and evaluated for the production of biosurfactant. Biosurfactant production was confirmed by conventional screening methods including hemolytic activity, drop collapsing test, oil displacement method, lipase production and emulsification index. The active compound was extracted with three solvents including ethyl acetate, diethyl ether and dichloromethane. The diethyl ether extract was fractionated by TLC and semi-preparative HPLC to isolate the pure compound. In TLC, a single discrete spot was obtained with the R (f) 0.60 and it was extrapolated as valine. Based on the chemical characterization, the active compound was partially confirmed as lipopeptide. The optimum production was attained at pH 7, temperature 30 degrees C, and 1% salinity with glucose and peptone supplementation as carbon and nitrogen sources, respectively. Considering the biosurfactant production potential of N. alba, the strain could be developed for large-scale production of lipopeptide biosurfactant.

  8. Macromycetes of the Potentillo albae-Quercetum in the Świętokrzyskie Mts. - monitoring studies

    Directory of Open Access Journals (Sweden)

    Janusz Łuszczyński

    2014-08-01

    Full Text Available The paper contains analysis of macromycetes collected on two observation plots in the forest community Potentillo albae-Quercetum in the Świętokrzyskie Mountains. The aim of these investigation was to determine the participation and the role of macromycetes in the forest community with oak trees. During the investigation 182 taxons of macrofungi were collected, 33 species of them were connected with oak trees.

  9. Evaluation of the effect of an organic extract obtained from Ipomoea alba L. on experimental periodontitis in rats

    OpenAIRE

    Guilherme Emerson Barrella; Ivana Barbosa Suffredini; Fernanda Vieira Ribeiro; Fabiano Ribeiro Cirano; Suzana Peres Pimentel

    2012-01-01

    The aim of this study was to evaluate the effect of an organic extract obtained from Ipomoea alba L. (Convolvulaceae or OE 1493), on experimental periodontal disease in rats. Periodontitis was induced in thirty six Wistar rats: a first mandibular molar was randomly assigned to receive a ligature, whereas the contralateral molar was left unligated. Animals were randomly assigned to two groups and treated topically, three times a day, for 11 days, as follows: Control Group - vehicle-treated (n ...

  10. Curricular Changes for Spanish and Portuguese in a New Era: The College and University

    Science.gov (United States)

    Nuessel, Frank

    2010-01-01

    In the past two years, the Modern Language Association (MLA) has produced two significant proposals for curricular change in foreign languages. The first, "Foreign Languages and Higher Education: New Structures for a Changing World," addressed the foreign language curriculum with specific suggestions for programmatic transformation. The second,…

  11. The Effect of Curricular Activities on Learner Autonomy: The Perspective of Undergraduate Mechanical Engineering Students

    Science.gov (United States)

    Duarte, M.; Leite, C.; Mouraz, A.

    2016-01-01

    This study researches how first-year engineering students perceived the influence of curricular activities on their own learning autonomy, measured with an adaptation of the Personal Responsibility Orientation to Self-direction in Learning Scale (PRO-SDLS). Participants were questioned to assess the influence of the teacher's role. The results…

  12. Integration of Science, Technology, Engineering and Mathematics: Is This Curricular Revolution Really Possible in France?

    Science.gov (United States)

    Lebeaume, Joel

    2011-01-01

    The French school system is a subjects-centred curriculum from the beginning of 1960s. This deep-rooted organisation tends to block the several attempts made to integrate the teaching of scientific school subjects. From an historical point of view, this paper describes the curricular system and the issue of its current change. It focuses on the…

  13. The University of New Brunswick's Renaissance College: Curricular Evolution and Assessment at the Faculty Level

    Science.gov (United States)

    Zundel, Pierre; Mengel, Thomas

    2007-01-01

    The purpose of this chapter is to draw some general lessons on curricular evolution processes and practices at the faculty level emerging from the creation of Renaissance College at the University of New Brunswick and the implementation of its BPhil program. The authors proceed by induction, working from the specific case of Renaissance College to…

  14. Effects of Curricular Activity on Students' Situational Motivation and Physical Activity Levels

    Science.gov (United States)

    Gao, Zan; Hannon, James C.; Newton, Maria; Huang, Chaoqun

    2011-01-01

    The purpose of this study was to examine (a) the effects of three curricular activities on students' situational motivation (intrinsic motivation [IM], identified regulation [IR], external regulation, and amotivation [AM]) and physical activity (PA) levels, and (b) the predictive strength of situational motivation to PA levels. Four hundred twelve…

  15. Curricular Implications of Virtual World Technology: A Review of Business Applications

    Science.gov (United States)

    Cyphert, Dale; Wurtz, M. Susan; Duclos, Leslie K.

    2013-01-01

    As business organizations grow increasingly virtual, traditional principles of organizational communication require examination and modification. This article considers the curricular implications of the growing business uses of virtual world technology through three different lenses--students as employee-users, students as strategic designers and…

  16. Elite Rationalities and Curricular Form: "Meritorious" Class Reproduction in the Elite Thinking Curriculum in Singapore

    Science.gov (United States)

    Lim, Leonel; Apple, Michael W.

    2015-01-01

    While much of the critical scholarship around elite schooling has focused on the students who attend elite institutions, their social class locations, privileged habituses and cultural capital, this paper foregrounds curricular form itself as a central mechanism in the (re)production of elites. Using Basil Bernstein's conceptual framework of…

  17. The Play Curricular Activity Reflection Discussion Model for Game-Based Learning

    Science.gov (United States)

    Foster, Aroutis; Shah, Mamta

    2015-01-01

    This article elucidates the process of game-based learning in classrooms through the use of the Play Curricular activity Reflection Discussion (PCaRD) model. A mixed-methods study was conducted at a high school to implement three games with the PCaRD model in a year-long elective course. Data sources included interviews and observations for…

  18. Cross-Curricular Teaching and Learning in the Secondary School Mathematics

    CERN Document Server

    Ward-Penny, Robert

    2010-01-01

    Cross-curricular approaches have much to offer the modern mathematics classroom. They can help teachers to present mathematics as a growing, relevant discipline that is central to much of modern life, and help learners to make sense of what they are doing and why.

  19. The Relationship of IEP Quality to Curricular Access and Academic Achievement for Students with Disabilities

    Science.gov (United States)

    La Salle, Tamika P.; Roach, Andrew T.; McGrath, Dawn

    2013-01-01

    The purpose of this study was to investigate the quality of Individualized Education Programs (IEPs) and its influence on academic achievement, inclusion in general education classrooms, and curricular access for students with disabilities. 130 teachers from the state of Indiana were asked to submit the most recent IEP of one of their students in…

  20. Discursos curriculares na disciplina escolar Química Curriculum discourses in school Chemistry

    Directory of Open Access Journals (Sweden)

    Alice Casimiro Lopes

    2005-08-01

    Full Text Available Neste artigo, é defendido que a disciplina escolar é um híbrido de discursos curriculares. Para argumentar em favor dessa idéia, é analisado como textos na área de ensino de Química influenciam nas políticas de currículo, hibridizando discursos oficiais e outros discursos curriculares. São articuladas as discussões teóricas de Ball, sobre políticas de currículo, de Goodson, sobre disciplinas escolares, de Bernstein, sobre recontextualização, e de Canclini, sobre hibridismo.This paper defends the hybridism of curricular discourses in school subjects. To argue in favor of this idea, chemistry education's texts are analyzed to show the influence of curriculum policy in hybridizing the official discourses and other curricular discourses. The text draws on the analysis of Ball about curriculum policy, on Goodson's school subjects, on Bernsteins's recontextualization and Canclini's hybridism.

  1. Exploring the Association between Campus Co-Curricular Involvement and Academic Achievement

    Science.gov (United States)

    Bergen-Cico, Dessa; Viscomi, Joe

    2013-01-01

    This research examines the relationship between college student attendance at co-curricular programs and GPA. Researchers tracked attendance of two cohorts totaling 3,000+ students through electromagnetic scanning at university-sponsored events. Analysis of GPA by attendance rate clusters revealed that students attending 5-14 events over the…

  2. Evaluating the Implementation of International Computing Curricular in African Universities: A Design-Reality Gap Approach

    Science.gov (United States)

    Dasuki, Salihu Ibrahim; Ogedebe, Peter; Kanya, Rislana Abdulazeez; Ndume, Hauwa; Makinde, Julius

    2015-01-01

    Efforts are been made by Universities in developing countries to ensure that it's graduate are not left behind in the competitive global information society; thus have adopted international computing curricular for their computing degree programs. However, adopting these international curricula seem to be very challenging for developing countries…

  3. "Teachosaurus" and "Learnoceratops": Dinosaurs as a Motivating Cross-Curricular Theme

    Science.gov (United States)

    Duggan, Denis

    2011-01-01

    The author takes a look into the benefits that dinosaurs may bring to the classroom. He discusses how he used dinosaurs as a cross-curricular theme to improve children's understanding and knowledge of science concepts. To investigate what a child might learn from dinosaurs, he started by comparing the many non-fiction dinosaur books using the…

  4. The Ontological Architectures in the Application of a Knowledge Management System for Curricular Assessment

    Science.gov (United States)

    Olson, Brandon D.

    2012-01-01

    Institutions of higher education are facing increasing pressure to improve the effectiveness and quality of academic programs (Association of Governing Boards, Top public policy issues 2011-2012, 2011). These institutions apply curricular assessment processes as a means to evaluate and improve academic effectiveness and quality. Knowledge…

  5. Multicultural Education: Raj's Story Using a Curricular Conceptual Lens of the Particular

    Science.gov (United States)

    Ross, Vicki; Chan, Elaine

    2008-01-01

    In this study, we employ a curricular conceptual lens of the particular to explore the experience of multicultural education from the perspective of an immigrant student, Raj. Using a school-based narrative inquiry approach, we learn about Raj's experiences at the intersections of immigration and settlement, adaptation and assimilation,…

  6. Do Curricular and Cocurricular Diversity Activities Influence Racial Bias? A Meta-Analysis

    Science.gov (United States)

    Denson, Nida

    2009-01-01

    In response to rapidly changing demographics and increased racial tensions, institutions across the country have implemented diversity-related initiatives--to varying degrees--designed to promote positive intergroup relations. This increased interest has resulted in a growing body of research examining the impact of curricular and cocurricular…

  7. A Case Study of Youth Participatory Evaluation in Co-Curricular Service Learning

    Science.gov (United States)

    Samuelson, Beth Lewis; Smith, Ross; Stevenson, Eleanor; Ryan, Caitlin

    2013-01-01

    This paper examines the practice of participatory evaluation through an exploratory single case study of the Evaluation Team of Books & Beyond, a co-curricular service-learning program of the Global Village Living-Learning Center at Indiana University. The paper, which is authored by three undergraduate members of the evaluation team and their…

  8. Negotiating Curricular Transitions: Foreign Language Teachers' Learning Experience with Content-Based Instruction

    Science.gov (United States)

    Cammarata, Laurent

    2009-01-01

    Content-based instruction (CBI) has been touted as an effective curricular approach in a wide range of educational contexts, including immersion and English as a second language. Yet this approach to curriculum design is rarely implemented in conventional K-16 foreign language (FL) programs in the United States today. The phenomenological study…

  9. Exploring the Effectiveness of a Curricular Choice Majors Program on Teacher Motivation

    Science.gov (United States)

    VanDeusen Gaddis, Linda Marie

    2014-01-01

    The purpose of this qualitative case study was to explore how a curricular choice majors program influenced teacher motivation and student performance at a charter high school in Pennsylvania from the perception of the administration and teachers. The theoretical foundation for this study was the attribution motivation theory. This theory…

  10. Teaching Writing as a Professional Practice Skill: A Curricular Case Example

    Science.gov (United States)

    Grise-Owens, Erlene; Crum, Kimberly

    2012-01-01

    This article describes one MSW program's innovative and informed response to the pervasive problem of inadequate professional writing skills. We articulate the rationale, implementation, and assessment of our systemic response, which includes (a) requiring a professional writing course, (b) implementing curricular infusion of a standard writing…

  11. Humanism's Sisyphean Task: Curricular Reform at Brown University during the Second World War

    Science.gov (United States)

    Porwancher, Andrew

    2011-01-01

    In the midst of a curricular debate at Brown University during the Second World War, the faculty's humanists seized the opportunity to pen their views on the nature and purpose of higher education. This investigation reveals humanism as a fragmented force, at once principal and peripheral to the American academy. The central argument of this study…

  12. A Cross-Curricular Approach to "Learning to Learn" Languages: Government Policy and School Practice

    Science.gov (United States)

    Harris, Vee

    2008-01-01

    This article connects two fields of research: "learning to learn" and school-based teacher development. The context is a cross-curricular project between English and modern languages teachers. Carried out in two London schools, the study aimed to encourage students to transfer common language learning strategies across the two subjects. Findings…

  13. Diapositivos da unidade curricular de Circuitos e Sistemas Electrónicos para TIC

    OpenAIRE

    Garrido, Nuno

    2012-01-01

    Diapositivos de CSETIC: Amplificadores operacionais. Osciladores e malhas de captura de fase. Conversores A/D e D/A. Filtros analógicos. Lógica digital. Compilação de diapositivos de apoio à unidade curricular de Circuitos e Sistemas Electrónicos para TIC

  14. Apontamentos da unidade curricular de Circuitos e Sistemas Electrónicos para TIC

    OpenAIRE

    Garrido, Nuno

    2012-01-01

    Apontamentos sobre circuitos e sistemas electrónicos. Amplificadores operacionais. Filtros. Lógica digital. Osciladores. Malhas de captura de fase. Conversores A/D e D/A. Este documento é o resultado da compilação de vários apontamentos pedagógicos realizados para apoiar a unidade curricular de CSETIC.

  15. An Exploratory Study of the Curricular Integration of Ethics in Executive MBA Programs

    Science.gov (United States)

    Franco, Jaime M.

    2011-01-01

    An Exploratory Study of the Curricular Integration of Ethics in Executive MBA Programs News headlines of corporate scandals have unleashed a contentious debate of whether or not graduate management education has contributed to corporate collapses and the resultant financial crisis. In particular, questions abound as to the willingness of…

  16. Little Shrimp, Big Results: A Model of an Integrative, Cross-Curricular Activity

    Science.gov (United States)

    Ackerson, Nicole; Piser, Carol; Walka, Keith

    2010-01-01

    This integrative, cross-curricular lab engages middle school biology students in an exercise involving ecology, arthropod biology, and mathematics. Students research the anatomy and behavioral patterns of a species of brine shrimp, compare the anatomy of adult and juvenile brine shrimp, and graph and interpret results. In this article, the authors…

  17. Models for Curricular Materials Development: Combining Applied Development Processes with Theory

    Science.gov (United States)

    Appleton, James; Lawrenz, Frances; Craft, Elaine; Cudmore, Wynn; Hall, Jim; Waintraub, Jack

    2007-01-01

    Developing curricular materials for technical and vocational education is particularly challenging because of the comprehensive requirements for technical education and the rapidity with which technical positions are evolving. Well-educated employees are expected to have general communication, reasoning, problem-solving, and behavioral skills in…

  18. Sports Business Unit Meets Cross-Curricular Learning Goals: Grades 9-12

    Science.gov (United States)

    Curriculum Review, 2006

    2006-01-01

    A new online learning tool called the eCommSports Kit links a seven-step sports marketing curriculum with a school team to give students real-life experience in developing and executing a plan to boost game attendance. The kit, available through http://www.ecommsports.com, takes teens on a cross-curricular journey through conducting business…

  19. Our Environment. Language Arts Theme Units, Volume I. Cross Curricular Activities for Primary Grades.

    Science.gov (United States)

    McAllister, Elizabeth A.; Hildebrand, Joan M.; Ericson, Joann H.

    Suggesting that students in the primary grades can explore the world around them and practice valuable skills in spelling, reading, writing, communication, and language, this book presents cross-curricular units on the environment that reach diverse needs by working through emotional memory, deductive reasoning, and multiple intelligences.…

  20. People Around Us. Language Arts Theme Units, Volume V. Cross Curricular Activities for Primary Grades.

    Science.gov (United States)

    McAllister, Elizabeth A.; Hildebrand, Joan M.; Ericson, Joann H.

    Suggesting that students in the primary grades can explore the world around them and practice valuable skills in spelling, reading, writing, communication, and language, this book presents cross-curricular units on "people around us" that reach diverse needs by working through emotional memory, deductive reasoning, and multiple intelligences.…

  1. Intriguing Animals. Language Arts Theme Units, Volume IV. Cross Curricular Activities for Primary Grades.

    Science.gov (United States)

    McAllister, Elizabeth A.; Hildebrand, Joan M.; Ericson, Joann H.

    Suggesting that students in the primary grades can explore the world around them and practice valuable skills in spelling, reading, writing, communication, and language, this book presents cross-curricular units on intriguing animals that reach diverse needs by working through emotional memory, deductive reasoning, and multiple intelligences.…

  2. Cross-curricular goals and raising the relevance of science education

    DEFF Research Database (Denmark)

    Belova, Nadja; Dittmar, Johanna; Hansson, Lena

    2016-01-01

    focuses on a set of such cross-curricular goals from a chemistry education perspective, namely education for sustainability, critical media literacy, innovation competence, vocational orientation, and employability. It relates them to the idea of relevant chemistry and science education. Directions...

  3. Fostering Tolerance of Obesity through Empathy and Critical Reflection: A Curricular Unit Incorporating Filmed Testimonials

    Science.gov (United States)

    Ogle, Jennifer Paff; Damhorst, Mary Lynn

    2010-01-01

    With the prevalence of overweight and obesity on the rise in America, the role of educators in creating transformative learning contexts that minimize obesity bias and that foster tolerance has become increasingly crucial. The purpose of this work was to develop and explore the effectiveness of a curricular unit to promote tolerance and…

  4. La educabilidad: atributo mediacional entre la realidad curricular y organizativa del centro escolar

    Directory of Open Access Journals (Sweden)

    Miguel PÉREZ FERRA

    2009-11-01

    Full Text Available Es evidente, que la actividad de los centros educativos necesita para alcanzar las finalidades que justifican su existencia y trabajo, ser planificada, ordenada, programada, desarrollada y evaluada. Toda esta labor se sintetiza y recoge en el Proyecto de Centro, instrumento de planificación a medio plazo, que concreta y desarrolla los elementos que lo integran: Finalidades educativas, Proyecto curricular de Centro y Reglamento de Organización y Funcionamiento. En este artículo realizamos una reflexión sobre la conveniencia, posibilidad y realidad de utilización con carácter orgánico de dos documentos esenciales en el Proyecto de Centro. Nos referimos al Proyecto Curricular de Centro y al Reglamento de Organización y Funcionamiento. El estudio integra tres perspectivas complementarias: la realidad ontológica o conveniencia de dicha relación que intentamos justificar desde el atributo educabilidad, propio del hombre, nexo de unión entre la esencia de los dos documentos; la realidad histórica de los últimos cincuenta años y su incidencia en la relación organizativo-curricular de los centros; por último, valoramos la trayectoria lineal de la formación del profesorado en España y sus respuestas al centro como unidad organizativa, profesional y curricular.

  5. A Cross-Curricular, Problem-Based Project to Promote Understanding of Poverty in Urban Communities

    Science.gov (United States)

    Gardner, Daniel S.; Tuchman, Ellen; Hawkins, Robert

    2010-01-01

    This article describes the use of problem-based learning to teach students about the scope and consequences of urban poverty through an innovative cross-curricular project. We illustrate the process, goals, and tasks of the Community Assessment Project, which incorporates community-level assessment, collection and analysis of public data, and…

  6. Curricular Innovation for Sustainability: The Piedmont/Ponderosa Model of Faculty Development

    Science.gov (United States)

    Barlett, Peggy F.; Chase, Geoffrey W.

    2012-01-01

    Curricular innovation is at the center of the challenges many colleges and universities face as they seek to help students address more successfully than previous generations the complex, multi-faceted, systemic challenges of global climate change, population growth, loss of biodiversity, environmental justice, toxic wastes, and food insecurity.…

  7. The Influence of SLA Training in Curricular Design among Teachers in Preparation

    Science.gov (United States)

    Kessler, Greg; Bikowski, Dawn

    2011-01-01

    This study reports on how language teachers in preparation integrate key concepts from second language acquisition (SLA) theory into CALL curricular design. The need for language teachers who have had SLA coursework to receive orientation to student-centered learning in a CALL context has been identified previously (Kessler, 2010). This research…

  8. Topic Order in Introductory Physics and its Impact on the STEM Curricular Ladder

    Directory of Open Access Journals (Sweden)

    Teresa L Larkin

    2017-02-01

    Full Text Available Introductory physics courses are an important rung on the curricular ladder in STEM. These courses help to strengthen students critical thinking and problem solving skills while simultaneously introducing them to many topics they will explore in more detail in later courses in physics and engineering. For these reasons, introductory physics is a required element on the curricular ladder. Most often, introductory physics is offered as a two-semester sequence with basic mechanics being taught in the first semester and electricity and magnetism in the second. In fact, this curricular sequence has not been altered in decades. Is there a reason for this? There are many other enduring questions that arise pertaining to these foundation courses in physics. These questions include: Does taking the introductory course sequence “out of order” have an impact on student learning in physics? What topics should be taught? When should these topics be taught? What topics could be left out? The list of questions is essentially endless. This paper will address some of these questions in part, through a brief discussion on student learning in a second-semester algebra-based physics course. Connections will also be made to the broader curricular ladder in STEM. To this end, an illustration that makes connections to an engineering statics course will be presented. This discussion will conclude by presenting some broader implications for the larger STEM communities.

  9. Unexpected Allies: Advancing Literacy in a "Science-English" Cross-Curricular Context

    Science.gov (United States)

    McClune, Billy; Alexander, Joy; Jarman, Ruth

    2012-01-01

    Critical reading of science-based media reports is an authentic context in which to explore the mutual interests of teachers of science and English, who want to use science in the media to promote their subject discipline while encouraging cross-curricular learning. This empirical study focused on 90 teachers of science and English to explore…

  10. Orientações curriculares para a Matemática em Portugal

    OpenAIRE

    Canavarro, Ana Paula

    2007-01-01

    O artigo identifica as principais orientações curriculares dos actuais programas de matemática do ensino não superior em Portugal, confrontando-as no que diz respeito a finalidades e objectivos, conceitos chave e conteúdos, colocando questões para a sua duiscussão

  11. Tratamiento del conocimiento probabilístico en los proyectos y materiales curriculares

    OpenAIRE

    1995-01-01

    En este articulo se analizan los diferentes proyectos y propuestas curriculares relacionadas con el tratamiento del conocimiento estocástico, los contenidos que recogen y las orientaciones que sugieren para su tratamiento en el aula centradas la mayoría de ellas en un estudio frecuencialista del fenómeno aleatorio.

  12. Extra-Curricular and out-of-School Education in European Socialist Countries.

    Science.gov (United States)

    Wegerich, Hans-Joachim

    1988-01-01

    Describes extra-curricular activities in East Germany, Bulgaria, Czechoslovakia, Poland, Romania, and the USSR, and provides an annotated bibliography that covers activities in the social sciences; science and technology; natural sciences; arts and culture; sports; tourism; mass media; after school centers; holiday activities; and youth…

  13. A TEMÁTICA AMBIENTAL EM DOCUMENTOS CURRICULARES NACIONAIS DO ENSINO MÉDIO

    Directory of Open Access Journals (Sweden)

    Diógenes Valdanha

    Full Text Available Este artigo relata uma pesquisa que investigou em que medida e extensão a temática ambiental é desenvolvida em documentos curriculares nacionais do Ensino Médio, em continuidade a um estudo anterior que realizou similar investigação, porém em documentos curriculares nacionais do Ensino Fundamental (anos finais. Realizou-se uma análise do conteúdo dos documentos curriculares em uma abordagem qualitativa da pesquisa educacional. Nesses documentos, a presença da temática ambiental é muito menor e menos significativa quando comparada aos do Ensino Fundamental; além de prevalecer uma concepção conservacionista/científica, trazendo uma visão reducionista e pouco politizada/crítica da temática ambiental no processo educativo. Distintamente, as novas Diretrizes Curriculares Nacionais para o Ensino Médio avançam na inclusão de uma educação ambiental crítica no currículo nacional da escola básica.

  14. Assessment Of Biologically Synthesized Ag Nanoparticles Toxicity Against E. coli, Staphylococcus aureus, Parachlorella kessleri And Sinapis alba

    Directory of Open Access Journals (Sweden)

    Kaduková Jana

    2015-06-01

    Full Text Available In general, Ag+ ions and AgNPs are considered to be the most toxic for bacterial cells and less toxic for higher organisms. In the present work inhibitory effects of biologically prepared silver nanoparticles on the growth of bacteria E. coli CCM 3954 and Staphylococcus aureus CCM 3953, green microscopic alga Parachlorella kessleri LARG/1 and seed germination and root growth of plant Sinapis alba seeds were investigated. Surprisingly, silver nanoparticles showed much stronger inhibitory effects on plant seed germination and root growth than on the bacterial growth. At concentration of 75 mg/l AgNPs both seed germination and root growth of Sinapis alba was inhibited whereas inhibition of the growth of E. coli and S. aureus was observed at >195 mg/l. Growth inhibition of alga Parachlorella kessleri was recorded at 300 mg/l AgNPs concentration. The inhibitory effect of silver ions was much higher compared to silver nanoparticles. Even 20 mg/l concentration of Ag+ ions inhibited the root growth and concentration > 45 mg/l inhibited germination of Sinapis alba seeds. Inhibition zones in both studied bacteria were found at concentration > 140 mg/l.

  15. Antimutagenic evaluation of traditional medicinal plants from South America Peumus boldus and Cryptocarya alba using Drosophila melanogaster.

    Science.gov (United States)

    Carmona, Erico R; Reyes-Díaz, Marjorie; Parodi, Jorge; Inostroza-Blancheteau, Claudio

    2017-03-17

    Peumus boldus Mol. ("Boldo") and Cryptocarya alba Mol. Looser ("Peumo") are medicinal shrubs with wide geographical distribution in South America. Their leaves and fruits are commonly used in traditional medicine because they exhibit natural medicinal properties for treatment of liver disorders and rheumatism. However, there are no apparent data regarding potential protective effects on cellular genetic components. In order to examine potential mutagenic and/or antimutagenic effects of these medicinal plants, the Drosophila melanogaster (D. melanogaster) wing-spot test was employed. This assay detects a wide range of mutational events, including point mutations, deletions, certain types of chromosomal aberrations (nondisjunction), and mitotic recombination. Qualitative and quantitative analyses of phenolic and anthocyanin compounds were carried out using biochemical and high-performance liquid chromatography methodologies. In addition, the antioxidant capacity of P. boldus and C. alba leaf extracts was also analyzed. P. boldus and C. alba extracts did not induce significant mutagenic effects in the D. melanogaster model. However, simultaneous treatment of extracts concurrently with the mutagen ethyl methane sulphonate showed a decrease of mutant spots in somatic cells of D. melanogaster, indicating desmutagenic effects in this in vivo model. Flavonoids and anthocyanins were detected predominantly in the extracts, and these compounds exerted significant antioxidant capacity. The observed antimutagenic effects may be related to the presence of phytochemicals with high antioxidant capacity, such as flavonoids and antohocyanins, in the extracts.

  16. Basella alba rubra spinach pigment-sensitized TiO2 thin film-based solar cells

    Science.gov (United States)

    Gokilamani, N.; Muthukumarasamy, N.; Thambidurai, M.; Ranjitha, A.; Velauthapillai, Dhayalan

    2015-03-01

    Nanocrystalline TiO2 thin films have been prepared by sol-gel dip coating method. The X-ray diffraction results showed that TiO2 thin films annealed at 400, 450 and 500 °C are of anatase phase and the peak corresponding to the (101) plane is present in all the samples. The grain size of TiO2 thin films was found to increase with increasing annealing temperature. The grain size is found to be 20, 25 and 33 nm for the films annealed at 400, 450 and 500 °C. The structure of the TiO2 nanocrystalline thin films have been examined by high-resolution transmission electron microscope, Raman spectroscopy and FTIR spectroscopy. TiO2 thin films were sensitized by natural dyes extracted from basella alba rubra spinach. It was found that the absorption peak of basella alba rubra extract is at about 665 nm. The dye-sensitized TiO2-based solar cell sensitized using basella alba rubra exhibited a J sc of 4.35 mA cm-2, V oc of 0.48 V, FF of 0.35 and efficiency of 0.70 %. Natural dyes as sensitizers for dye-sensitized solar cells are promising because of their environmental friendliness, low-cost production and fully biodegradable.

  17. Effects of Basella alba and Hibiscus macranthus extracts on testosterone production of adult rat and bull Leydig cells

    Institute of Scientific and Technical Information of China (English)

    Paul F. Moundipa; Nathalie Sara E. Beboy; Fabien Zelefack; Silvère Ngouela; Etienne Tsamo; Wolf-Bernhard Schill; Thomas K. Monsees

    2005-01-01

    Aim: To determine the androgenic effects of Basella alba and Hibiscus macranthus extracts in the rat and the bull,and to develop a novel in vitro test system using Leydig cells from bull testes. Methods: The effect of methanol extracts from both plants on testosterone production in isolated Leydig cells from the rat and the bull was analyzed using 125I-radioimmunoassay (125I-RIA). Rat Leydig cells were obtained by common methods, whereas a novel technique was used to purify Leydig cells from bull testes. Results: Bull testes from the slaughter house were a cheap source of pure Leydig cells. In culture, these cells produced testosterone for 5-6 days, which can be stimulated by human chorionic gonadotrophin (hCG). Basella alba extracts significantly enhanced testosterone production in bull and rat Leydig cells in a concentration-dependent manner. Hibiscus macranthus showed no androgenic effect but was shown to inhibit testosterone production at higher concentrations. Conclusion: Leydig cells purified from bull testes can be used as an alternative tool in experimental animal research. Certain fractions of Basella alba extract demonstrated androgenic potential whereas Hibiscus macranthus extracts did not.

  18. Assessment of the repellent effect of Lippia alba essential oil and major monoterpenes on the cattle tick Rhipicephalus microplus.

    Science.gov (United States)

    Lima, A da Silva; Carvalho, J F de; Peixoto, M G; Blank, A F; Borges, L M F; Costa Junior, L M

    2016-03-01

    The control of Rhipicephalus microplus (Ixodida: Ixodidae) is achieved using synthetic acaricides. However, resistant tick populations are widespread around the world. Plant essential oils can act as repellents, keeping ticks away from hosts and decreasing the selection pressure on synthetic acaricides. The aim of this study was to evaluate the in vitro repellent effect of Lippia alba essential oil on R. microplus larvae. Leaves from two L. alba genotypes maintained under the same agronomic and environmental conditions were collected. Essential oil was extracted by hydrodistillation and analysed by gas chromatography-mass spectrometry (GC-MS). The major monoterpenes detected in the chemical analysis were commercially acquired and tested. For the repellency test, a glass rod was vertically fixed to measure active climbing of approximately 30 R. microplus larvae aged 14-21 days in response to essential oils and monoterpenes. Repellency was evaluated at 1 h, 3 h and 5 h after treatment. Variation in repellent action was detected between the genotypes. The major monoterpenes identified in the essential oils (limonene and carvone) showed low repellent effects in comparison with intact essential oils. Thus, the present results showed that L. alba essential oil contains bioactive compounds with great repellent activity against ticks that varies according to the plant genotype.

  19. Transportation of silver catfish, Rhamdia quelen, in water with eugenol and the essential oil of Lippia alba.

    Science.gov (United States)

    Becker, Alexssandro G; Parodi, Thaylise V; Heldwein, Clarissa G; Zeppenfeld, Carla C; Heinzmann, Berta M; Baldisserotto, Bernardo

    2012-06-01

    This study investigated the effectiveness of eugenol and of the essential oil (EO) of Lippia alba when used in the transport of the silver catfish (Rhamdia quelen). These investigations involved measurements of blood (pH, PvO(2), PvCO(2) and HCO(3) (-)) and water parameters, survival and ionoregulatory balance. Fish (301.24 ± 21.40 g, 28.90 ± 1.30 cm) were transported at a loading density of 169.2 g L(-1) for 4 h in fifteen plastic bags (7 L) divided into five treatments: control, 1.5 or 3.0 μL L(-1) of eugenol and 10 or 20 μL L(-1) of EO of L. alba. The water parameters were measured before (0 h) and after (4 h) transportation. The net Na(+), Cl(-) and K(+) losses were higher in fish from the control treatment compared to the other treatments. The PvO(2), PvCO(2) and HCO(3) (-) increased significantly in all of the treatments at the end of the transport period. In conclusion, based on the water (total ammonia nitrogen) and ionoregulatory indicators determined in the present study, our findings indicate that eugenol and the EO of L. alba are recommended for use in the transport of this species because these anesthetics apparently reduce stress.

  20. Construcción politica de reformas curriculares: El caso de Chile en los noventa

    Directory of Open Access Journals (Sweden)

    Cristián Cox

    2006-01-01

    Full Text Available El autor es un experto implicado en el proceso de diseño curricular vivido en Chile desde la promulgación del LOCE en 1990. El artículo, Basándose en esta experiencia, el artículo describe con detalle este proceso. Muestra las claves, circunstancias y momentos del proceso de construcción y desarrollo de una reforma curricular. Da cuenta de los procesos y contextos que intervienen en ello. Señala que tiene un proceso de construcción política. Pero no sólo se deben a este tipo de decisiones (como marco ideológico y social de decisiones y poder. Los procesos reflexivos que acompañan la toma de decisiones y los cursos de acción generados son importantes. Como también lo es la historia. Incluso los lineamientos curriculares y las presiones hacia el cambio que se den globalmente pueden influir bastante. Así muestra como en Chile, a pesar de partir de una política educativa en la que no había entrado la idea de currículum, ésta empieza a emerger conforme se va construyendo su desarrollo práctico y curricular. De todas las lecciones aprendidas en el proceso destaca que son componentes clave del proceso la participación y la innovación. Argumenta que hay razones sustantivas y políticas para ello. La primera es clave para que el profesorado se apropie de la propuesta de reforma y la haga posible. Por último, destaca que se produce un desarrollo de las capacidades institucionales de diseño y desarrollo curricular en la medida que se ponen en marcha y acumulan procesos de este tipo.

  1. Las formas verbales en las biblias de Alba y Ferrara: ¿fidelidad al texto hebreo?

    Directory of Open Access Journals (Sweden)

    del Barco del Barco, Francisco Javier

    2004-12-01

    Full Text Available This article focuses on the study of narrative and prophetic texts in the Ferrara and Alba Bibles and on their comparison to the Hebrew original. The aim of such a study is to find the keys to their systems of translation within the medieval Jewish tradition of Biblical translations. One of the most remarkable aspects is the translation of the verbal forms from Biblical Hebrew to Spanish. What is interesting about this aspect is how the translators understand the verbal system of Biblical Hebrew and how they converted it into 15th and 16th century Castillan, as well as the existing differences in the translation of both bibles; this fact will be illustrated with abundant examples. The linguistic aspect is offered here in its sociological and cultural context, as factors that affect translation methods.

    Este artículo se centra en el estudio de textos narrativos y proféticos de las biblias de Alba y Ferrara y en su comparación con el original hebreo. El fin de tal estudio es hallar las claves de sus sistemas de traducción dentro de la tradición judía medieval de traducciones bíblicas. Uno de los aspectos más destacables es la traducción de las formas verbales del hebreo bíblico al español. El interés en este punto está en ver cómo los traductores entienden el sistema verbal del hebreo bíblico y lo vierten al castellano de los ss. XV y XVI, así como en las diferencias de traducción existentes entre ambas biblias, que será ilustrado con numerosos ejemplos. El aspecto lingüístico se presenta aquí en su contexto sociológico y cultural, como factores que influyen en los métodos de traducción.

  2. Genetic and environmental characterization of Abies alba Mill. populations at its western rear edge

    Directory of Open Access Journals (Sweden)

    Sancho-Knapik, D.

    2014-12-01

    Full Text Available The genetic structure of ten Abies alba populations at the western rear edge in the Spanish Pyrenees was characterized and compared with two German populations, looking for the role of climatic factors in the fir decline. Growth, defoliation, aridity and cumulative summer water deficit summer were also characterized. Spanish populations show a lower genetic diversity and a high genetic differentiation than German ones, mainly established by an East (higher diversity-West (lower diversity gradient. The three defoliated populations are the western ones, with higher summer aridity. Contrastingly, the southern population (Guara shows climatic variables close to western sites but without defoliation and with a higher genetic diversity, indicating a possible adaptation to the sub-Mediterranean conditions. Silver fir in the Spanish Pyrenees constitutes a “stable” rear edge because of their isolation, small sized and small genetic diversity. Western Pyrenean sites subjected to dryer conditions and presenting lower genetic diversity are prone to drought-induced mortality in the context of global warming.Se ha caracterizado la estructura genética de diez poblaciones de Abies alba en la retaguardia occidental de su distribución en el Pirineo español en comparación con dos poblaciones de Alemania, buscando la influencia de factores climáticos en el decaimiento del abeto. También se caracterizó crecimiento, defoliación, aridez y déficit acumulado de agua durante el verano. Las poblaciones españolas mostraron una menor diversidad genética y una mayor diferenciación genética que las poblaciones alemanas, establecida principalmente a través de un eje Este (mayor diversidad-Oeste (menor diversidad. Las tres poblaciones con defoliación son las del suroeste, con mayor aridez estival. Por el contrario, la población más meridional (Guara muestra variables climáticas cercanas a estas poblaciones del suroeste pero sin defoliación y con mayor

  3. Resultados preliminares del forraje de Morus alba en la alimentación de vacas lecheras

    Directory of Open Access Journals (Sweden)

    M. Milera

    2007-01-01

    Full Text Available El objetivo del presente trabajo consistió en evaluar el potencial del forraje de M. alba con vacas mestizas para la producción de leche. El trabajo se desarrolló en Cuba, la cual se encuentra localizada entre los 19° y 81’ de longitud oeste. La Estación Experimental de Pastos y Forrajes “Indio Hatuey” está ubicada en el municipio de Perico, provincia de Matanzas, sobre un suelo ferralítico rojo, a los 22° 40’ 7’’ de latitud norte y 81° 2’ de longitud oeste, a una altura de 10.91 msnm. La evaluación se hizo con vacas mestizas del cruce Holstein x Cebú, que tenían 54 días de lactancia. El estudio se dividió en dos periodos: en el primero (que duró 53 días se suministró el forraje de morera ad libitum, sin trocear, y se pastoreó de forma restringida en gramíneas mejoradas de secano, sin fertilización; en el segundo periodo, los animales dispusieron de pastoreo de gramíneas mejoradas con un 10% de un área establecida con Leucaena leucocephala y recibieron forraje de morera restringido hasta el 1% del peso vivo; éste tuvo una duración de 87 días. Se determinó la disponibilidad de pasto, la composición bromatológica y el consumo de forraje de Morus alba, así como la producción de leche de las vacas. El forraje de morera presentó altos va- lores de proteína y bajos contenidos de fibra; los consumos en el primer periodo llegaron hasta 2.7% del peso vivo. La producción de leche promedio fue de 10.6 kg/vaca/día durante los 140 días de evaluación y la máxima producción se registró en los primeros 53 días (1 kg/vaca/día. Los resultados demostraron la alta calidad de la morera cuando se utiliza como forraje para la alimentación de vacas mestizas. En las condiciones evaluadas, es posible obtener producciones de 10 litros por animal diariamente, cuando se utiliza el forraje de morera en adición al pasto de especies mejoradas, sin suplementación de concentrados.

  4. Wide Ranging Insect Infestation of the Pioneer Mangrove Sonneratia alba by Two Insect Species along the Kenyan Coast

    Science.gov (United States)

    Jenoh, Elisha Mrabu; Robert, Elisabeth M. R.; Lehmann, Ingo; Kioko, Esther; Bosire, Jared O.; Ngisiange, Noah; Dahdouh-Guebas, Farid; Koedam, Nico

    2016-01-01

    Insect infestation of mangroves currently threatens mangrove forest health and management. In the Western Indian Ocean region, little is known about insect damage to mangroves despite the fact that numerous infestations have occurred. In Kenya, infestations of Sonneratia alba have persisted for almost two decades, yet the taxonomic identity of the infesting pest(s), the extent of infestation, the pests’ biology, the impacts of infestation on host and the ecosystem, the host’s defensive strategies to the infestation are poorly understood. S. alba is a ubiquitous, pioneer mangrove species of the Indo-Pacific, occurring along the waterfront in a variety of mangrove ecosystem settings. Our main objectives were to identify the pest(s) responsible for the current dieback of S. alba in Kenya, and to determine the extent of infestation. To identify the pests responsible for infestation, we trapped emergent insects and reared larvae in the laboratory. To determine the overall extent of infestation within the S. alba zone, we assessed nine sites along the entire Kenyan coastline for the presence or absence of infested mangroves. Insect infestation in two mangrove embayments (Gazi and Mida) was quantified in depth. Two wood-boring insects were identified: a metarbelid moth (Lepidoptera, Cossoidea) of undescribed genus and the beetle Bottegia rubra (Cerambycidae, Lamiinae).The metarbelid moth infests mangroves in both northern (from Ngomeni to Kiunga) and southern regions (from Vanga to Mtwapa) of the Kenyan coast. B. rubra appeared in low density in Gazi, and in high density in Mida, Kilifi, and Ngomeni, with densities gradually decreasing northward. Insect infestation levels reached 18% in Gazi and 25% of S. alba stands in Mida. Our results indicate that B. rubra has the ability to infest young mangrove trees and expand its range, posing a danger to rehabilitation efforts where plantations have been established. Thus, there is great need for forest managers to address

  5. Consideraciones Sobre la Línea de Investigación en Inteligencia Organizacional en el Doctorado en Ingeniería de la U.D.F.J.C.On Research Aspects of Organizational Intelligence at the Engineering Doctoral Program of U.D.F.J.C.

    Directory of Open Access Journals (Sweden)

    Germán Andres Méndez Giraldo

    2014-10-01

    Full Text Available Este documento presenta los aspectos más relevantes de la línea de investigación de Inteligencia Organizacional en el contexto del Doctorado en Ingeniera de la Universidad Distrital, cuyo principal énfasis es el de en Ciencia y Tecnología de la Información y del Conocimiento. Desde esta óptica, la Inteligencia Organizacional permite estudiar y entender las formas en que las organizaciones generan, socializan y utilizan el conocimiento individual y colectivo para su beneficio. Esta línea propende por contextualizar estos procesos en el caso colombiano, a su vez se pretende estudiar a las organizaciones sociales desde los enfoques basados en los modelos de inteligencia. Todo esto se encamina a difundir estas temáticas a fin de permitir que en el Doctorado se cree un mayor entendimiento y por ello, potencializar las investigaciones en el ámbito de las empresas y de la sociedad en general apoyadas por el grupo de investigación de Sistemas Expertos y Simulación.

  6. Doutorado-sanduíche em enfermagem: relato de experiência Doctorado sándwich en enfermería: relato de experiencia Sandwich doctoral program in nursing: an experience report

    Directory of Open Access Journals (Sweden)

    Rosane Arruda Dantas

    2009-06-01

    Full Text Available Relato de experiência acerca de estágio de doutorando-sanduíche realizado com bolsa da Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, durante o período de outubro de 2005 a janeiro de 2006, na Faculdade de Enfermagem de D. Ana Guedes, no Porto, em Portugal, instituição já visitada na graduação. Tive a oportunidade de replicar a metodologia de parte da dissertação com crianças portuguesas. Isso permitiu estudo comparativo entre duas culturas que guardam afinidades, mas têm características distintas. Além disso, ministrei aulas, participei de cursos e seminários e aprofundei os conhecimentos acerca da Teoria da Universalidade e Diversidade do Cuidado Cultural. Considero que esta experiência é um estímulo para a garantia da autonomia do enfermeiro na assistência de enfermagem, como pesquisador e docente, ampliando conhecimentos e os inserindo no processo de cuidado. Ademais, influencia positivamente no amadurecimento psicológico, cultural e social do doutorando.Relato de experiencia acerca de pasantía de doctorado sándwich realizado con suporte financiero de la Coordinación de Mejora del Personal del Nivel Superior, durante el período de octubre de 2005 a enero de 2006, en la Facultad de Enfermería de D. Ana Guedes, en Porto, Portugal, institución ya visitada durante la graduación. Tuve la oportunidad de replicar la metodología de parte de la disertación junto a niños portugueses. Esto permitió un estudio comparativo entre dos culturas que guardan afinidades, pero tienen características distintas. Además, ministré clases, participé de cursos y seminarios y me profundicé en los conocimientos acerca de la Teoría de la Universalidad y Diversidad del Cuidado Cultural. Considero que esta experiencia es un estímulo para la garantía de la autonomía del enfermero en la atención de enfermería, como investigadora y docente, ampliando conocimientos e insertándolos en el proceso de cuidado. Adem

  7. THE CHLOROSODIUM MINERAL WATERS IN ALBA COUNTY, LASTING TOURISTIC PROTECTION AND CAPITALIZATION

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    N. CIANGĂ

    2013-03-01

    Full Text Available This study represents a continuation of the research and assessment of the resources of chlorosodium mineral waters on the territory of the Transylvanian Depression, especially regarding the emersion of salty springs, which are still not to be found in the literature of specialty.Therefore, this time, Alba County will be analyzed, a county in which certain researches have been made previously. Field research could also be added, representing the only possibility to update the data regarding the existent salty springs.The first already known examples are the chlorosodium mineral waters billeted in lakes situated in Ocna Mureş. As locations with chlorosodium mineral waters which appear at the surface under the form of salty springs with a salinity exceeding 1 g/l, as compared to the specified ones, Ocnişoara, Cetatea de Baltă, Petrisat - Blaj, Crăciunelu de Jos, Secăşel, Dumitra and Draşov are to be mentioned.As far as the protection of these resources is concerned, the main debated issues are related to phenomena such as their clogging and sweetening, which determines many springs of chlorosodium mineral waters to become ephemeral.

  8. Analysis and characterisation of phytochemicals in mulberry (Morus alba L.) fruits grown in Vojvodina, North Serbia.

    Science.gov (United States)

    Natić, Maja M; Dabić, Dragana Č; Papetti, Adele; Fotirić Akšić, Milica M; Ognjanov, Vladislav; Ljubojević, Mirjana; Tešić, Živoslav Lj

    2015-03-15

    In this study, the polyphenolic profile of 11 Morus alba fruits grown in the Vojvodina region was investigated. Ultra high performance liquid chromatography (UHPLC) coupled with Linear Trap Quadrupole and OrbiTrap mass analyzer, and UHPLC coupled with a diode array detector and a triple-quadrupole mass spectrometer were used for the identification and quantification of the polyphenols, respectively. A total of 14 hydroxycinnamic acid esters, 13 flavonol glycosides, and 14 anthocyanins were identified in the extracts with different distributions and contents according to the sampling. The total phenolic content ranged from 43.84 to 326.29 mg GAE/100g frozen fruit. The radical scavenging capacity (50.18-86.79%), metal chelating ability (0.21-8.15%), ferric ion reducing power (0.03-38.45 μM ascorbic acid) and superoxide anion radical scavenging activity (16.53-62.83%) were assessed. The findings indicated that mulberry polyphenolics may act as potent superoxide anion radical scavengers and reducing agents.

  9. La palabra y el aire: Conjuros del alba de Jorge Chen-Sham

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    Carolina Sanabria

    2016-10-01

    Full Text Available El presente artículo analiza el segundo poemario de Jorge Chen-Sham, Conjuros del alba, a la luz de la vinculación directa con el libro anterior, Nocturnos de mar inacabada. Destaca los elementos que guían la lectura de un trabajo muy estructurado porque la organización en ejes temáticos permite brindar una clave de lectura. En este caso la articulación está dada por la invocación de la palabra en su acepción divina como creadora de realidad bajo la forma de conjuros –y en sintonía estructural y lingüística con el discurso bíblico arcaizante, pero sin ceñirse por completo en virtud del carácter pagano de estos–. Pero los alcances de la palabra no se limitan a esta dimensión, puesto que el hablante lírico hace ver también su injerencia como mediador del deseo. Y si el poeta por principio lo que busca es la elevación de su espíritu, se mueve necesariamente en el ámbito del aire –que es el mismo elemento al que pertenece el alba–, donde las cosmogonías ubican el origen del mundo.

  10. Antiosteoporotic Effect of Combined Extract of Morus alba and Polygonum odoratum

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    Sudarat Sungkamanee

    2014-01-01

    Full Text Available Due to the limitation of osteoporosis therapy, the alternative therapies from natural sources have been considered. In this study, we aimed to determine the antiosteoporotic effect of the combined extract of Morus alba and Polygonum odoratum leaves. Ovariectomized rats, weighing 200–220 g, were orally given the combined extract at doses of 5, 150, and 300 mg·kg−1 BW for 3 months. At the end of study, blood was collected to determine serum osteocalcin, calcium, and alkaline phosphatase level. In addition, tibia bone was isolated to determine bone oxidative stress markers, cortical bone thickness, and density of osteoblast. The combined extract decreased oxidative stress and osteoclast density but increased osteoblast density and cortical thickness. The elevation of serum calcium, alkaline phosphatase, and osteocalcin was also observed. These results suggested the antiosteoporotic effect of the combined extract via the increased growth formation together with the suppression of bone resorption. However, further studies concerning chronic toxicity and the underlying mechanism are required.

  11. Anthelmintic, antimicrobial, antioxidant and cytotoxic activity of Caltha palustris var. alba Kashmir, India.

    Science.gov (United States)

    Mubashir, Sofi; Dar, Mohd Yousuf; Lone, Bashir A; Zargar, M Iqbal; Shah, Wajaht A

    2014-08-01

    The methanolic extract obtained from the root portion of Caltha palustris var. alba was evaluated for its anthelmintic efficacy against gastrointestinal nematodes of sheep under both in vitro and in vivo conditions using worm motility inhibition (WMI) assay and fecal egg count reduction (FECR) assay, respectively. The extract was subjected to antimicrobial activity using agar-well diffusion method against different bacterial strains. In addition the extract was evaluated for cytotoxic and antioxidant activity against cultured THP-1(Leukemia), A-549 (Lung), HCT-15 (Colon), Cervix (HeLa) and PC-3(Prostrate) cell lines by SRB and DPPH radical scavenging assays. The extract used resulted in mean %WMI of 94.44%, as observed when the worms were put in lukewarm buffer for 30 min after exposure to different treatments. The mean mortality index of the sample was 0.95. The lethal concentration (LC50) was 0.11 mg·mL(-1). Cell lines were exposed to concentration of 100 μg·mL(-1) of extract for 48 h, which reduced the viability of these cell lines. The same plant extract also showed 55.58% DPPH radical scavenging activity.

  12. Evolutionary conservation of Kv3.1 in the barn owl Tyto alba.

    Science.gov (United States)

    Kullmann, Lars; Schlüter, Tina; Wagner, Hermann; Nothwang, Hans Gerd

    2013-01-01

    For prey capture in the dark, the barn owl Tyto alba has evolved into an auditory specialist with an exquisite capability of sound localization. Adaptations include asymmetrical ears, enlarged auditory processing centers, the utilization of minute interaural time differences, and phase locking along the entire hearing range up to 10 kHz. Adaptations on the molecular level have not yet been investigated. Here, we tested the hypothesis that divergence in the amino acid sequence of the voltage-gated K(+) channel Kv3.1 contributes to the accuracy and high firing rates of auditory neurons in the barn owl. We therefore cloned both splice variants of Kcnc1, the gene encoding Kv3.1. Both splice variants, Kcnc1a and Kcnc1b, encode amino acids identical to those of the chicken, an auditory generalist. Expression analyses confirmed neural-restricted expression of the channel. In summary, our data reveal strong evolutionary conservation of Kcnc1 in the barn owl and point to other genes involved in auditory specializations of this animal. The data also demonstrate the feasibility to address neuroethological questions in organisms with no reference genome by molecular approaches. This will open new avenues for neuroethologists working in these organisms.

  13. The potential of biomonitoring of air quality using leaf characteristics of white willow (Salix alba L.).

    Science.gov (United States)

    Wuytack, Tatiana; Verheyen, Kris; Wuyts, Karen; Kardel, Fatemeh; Adriaenssens, Sandy; Samson, Roeland

    2010-12-01

    In this study, we assess the potential of white willow (Salix alba L.) as bioindicator for monitoring of air quality. Therefore, shoot biomass, specific leaf area, stomatal density, stomatal pore surface, and stomatal resistance were assessed from leaves of stem cuttings. The stem cuttings were introduced in two regions in Belgium with a relatively high and a relatively low level of air pollution, i.e., Antwerp city and Zoersel, respectively. In each of these regions, nine sampling points were selected. At each sampling point, three stem cuttings of white willow were planted in potting soil. Shoot biomass and specific leaf area were not significantly different between Antwerp city and Zoersel. Microclimatic differences between the sampling points may have been more important to plant growth than differences in air quality. However, stomatal pore surface and stomatal resistance of white willow were significantly different between Zoersel and Antwerp city. Stomatal pore surface was 20% lower in Antwerp city due to a significant reduction in both stomatal length (-11%) and stomatal width (-14%). Stomatal resistance at the adaxial leaf surface was 17% higher in Antwerp city because of the reduction in stomatal pore surface. Based on these results, we conclude that stomatal characteristics of white willow are potentially useful indicators for air quality.

  14. Determintation of sulfor containing glucosides in Brassica nepus L. and Sinappis alba L. tissue cultures

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    Suleiman Afsharypuor

    1993-07-01

    Full Text Available In this study, hypocotyls of 5 day old seedlings of Brassica nepus L. and Sinappis alba L.. were explanted onto Murashige and Skoog's revised Tobaco Medium(lcontaining different concentrations of suitable plant growth regulators (a cytokinin and an auxin. In addition to the plant growth regulators, potassium sulfate(in a concentration of 3 m. eq./liter was added to some solid and liquid media in an attempt to raise available sulfate levels, to other medium, L - B- Phenylalanine was added (in a concentration of 30 m. eq./liter to act possibly as a precursor for the biosynthesis of sulfor containing glucoside (glucosinolate. Suspension cell cultures were initiated from callus and grown in the same medium without agar. Calli which were harvested at 20 weeks and cells at 6 weeks after subculture, were dried and examined by capillary GC for the presences of sulfor containing glucosides. The obtained results indicated the absence of such glucosides in the cells and calli.

  15. Anesthetic induction and recovery of Hippocampus reidi exposed to the essential oil of Lippia alba

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    Mauro Alves da Cunha

    Full Text Available The aim of this study was to identify the times of anesthetic induction and recovery in slender seahorses (Hippocampus reidi that were exposed to the essential oil of Lippia alba (EO, as well as the efficacy of EO as a stress-reducing agent in the transport of this species. Slender seahorses were placed in 1-L aquaria containing different concentrations of EO (0, 10, 20, 50, 150, 300 and 450 µL L-1, and after induction, fish were transferred to aquaria that were free of anesthetic to evaluate their recovery time. In an additional experiment, slender seahorses were transported in plastic bags with 15 µL L-1 of EO for 4 or 24 h. The increased concentration of EO proportionally decreased the time required for the induction of anesthesia. EO treatment (15 µL L-1 inhibited the increase in blood glucose levels that was provoked by transportation for 4 or 24 h. Transportation for 24 h also decreased the number of lymphocytes and increased the neutrophil count, and these effects were avoided with the addition of EO to the water. These results demonstrate that EO was effective as an anesthetic at concentrations of 10-20 µL L-1 for slight sedation and transport and at 150 µL L-1 for deep anesthesia in the slender seahorse.

  16. Evidences of local adaptation in quantitative traits in Prosopis alba (Leguminosae).

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    Bessega, C; Pometti, C; Ewens, M; Saidman, B O; Vilardi, J C

    2015-02-01

    Signals of selection on quantitative traits can be detected by the comparison between the genetic differentiation of molecular (neutral) markers and quantitative traits, by multivariate extensions of the same model and by the observation of the additive covariance among relatives. We studied, by three different tests, signals of occurrence of selection in Prosopis alba populations over 15 quantitative traits: three economically important life history traits: height, basal diameter and biomass, 11 leaf morphology traits that may be related with heat-tolerance and physiological responses and spine length that is very important from silvicultural purposes. We analyzed 172 G1-generation trees growing in a common garden belonging to 32 open pollinated families from eight sampling sites in Argentina. The multivariate phenotypes differ significantly among origins, and the highest differentiation corresponded to foliar traits. Molecular genetic markers (SSR) exhibited significant differentiation and allowed us to provide convincing evidence that natural selection is responsible for the patterns of morphological differentiation. The heterogeneous selection over phenotypic traits observed suggested different optima in each population and has important implications for gene resource management. The results suggest that the adaptive significance of traits should be considered together with population provenance in breeding program as a crucial point prior to any selecting program, especially in Prosopis where the first steps are under development.

  17. NOTES ON A STATUE FROM THE COLLECTIONS OF THE NATIONAL MUSEUM OF UNION FROM ALBA IULIA

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    Andreea Almăjanu

    2016-04-01

    Full Text Available This study proposes to re-evaluate a marble statue from the old collections of the National Museum of Union Alba Iulia. It was discovered by A. Cserni during excavations carried out at the Palace of the Governors of Roman Dacia, in 1898. It has been repeatedly published by Á. Hekler and Al. Diaconescu. While the latter author established dating and iconographic prototype of the statue, we believe that further details as discovery place and context, depiction, iconographic attribution and role of this work of art can be offered. Presence of a follower at the feet of the divinity, more precisely the right foot of a character – child, conveys us the idea of depiction of Eros, god of love. Usually, this is depicted beside nude or seminude Venus, and sculptural representation from Apulum is somehow different from iconographic point of view. As we see it, taking into consideration the discovery place, artefacts resulted from the same excavation, artistic eclecticism, religious iconographic influences and official politics of the Roman state, we believe we are dealing with rather an unusual statue of Venera as manner of representation or an image of an empress, wife of a governor or member of a family of municipal authorities from Apulum.

  18. Misunderstanding opportunities: (post-resettlement issues in the Recea neighbourhood of Alba Iulia

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    Cătălin Buzoianu

    2013-06-01

    Full Text Available Although its gold mining project has been locked in public debates and permit reviews for over a decade, a Canadian-Romanian company privately negotiated with the inhabitants of Roşia Montană commune, Romania, to buy their households and lands, and resettle them in a specially built neighbourhood in the city of Alba Iulia. This paper suggests that while the paternalistic character of resettlement has allowed resettlers to partially keep their group identity, and partially to reconstruct it in relation with the host community, it was also based on a misunderstanding of the relationship between resettlers and the organiser of resettlement. Drawing on field research, the resettlement was studied as a “continuous process” spanning three years (2010-12, during which this paper identifies (1 the changes in lifestyle, (2 the mechanisms of community regeneration, and (3 post-resettlement initiatives of resettlers. Although greater living costs (utility bills, real estate taxes, transportation and unemployment seem to be balanced by better living conditions and greater educational opportunities for their children, the ambivalent paternalistic aspect of the resettlement has negatively influenced the development of the new community. While at first community issues were unsuccessfully addressed to the company, recent public improvement initiatives by resettlers have caused tensions between the two sides.

  19. Gota úrica visceral em coruja suindara (Tyto alba de vida livre

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    Indiara dos Santos Sales

    2015-02-01

    Full Text Available A gota úrica é uma doença metabólica caracterizada pela deposição de cristais de urato e ácido úrico em tecidos do corpo, que pode acometer répteis, mamíferos e aves. Neste trabalho, relata-se um caso de achados post mortem compatíveis com gota úrica visceral em um exemplar de coruja suindara (Tyto alba de vida livre. Macroscopicamente, o pericárdio apresentava-se completamente esbranquiçado, espesso e aderido ao miocárdio e o fígado e ambos os rins apresentavam áreas esbranquiçados sugerindo acúmulo de urato. A microscopia do tecido cardíaco e hepático revelou pericardite fibrinosa e perihepatite necrosante respectivamente. Congestão pulmonar e infiltrado inflamatório heterofílico multifocal no parênquima renal também foram visualizados. As alterações encontradas são compatíveis com as descritas na literatura para gota úrica visceral em aves, podendo até serem consideradas como lesões patognomônicas. Este é o primeiro relato de gota úrica visceral em um rapinante de vida livre no Brasil.

  20. Prosopis alba exudate gum as excipient for improving fish oil stability in alginate-chitosan beads.

    Science.gov (United States)

    Vasile, Franco Emanuel; Romero, Ana María; Judis, María Alicia; Mazzobre, María Florencia

    2016-01-01

    The aim of the present work was to employ an exudate gum obtained from a South American wild tree (Prosopis alba), as wall material component to enhance the oxidative stability of fish oil encapsulated in alginate-chitosan beads. For this purpose, beads were vacuum-dried and stored under controlled conditions. Oxidation products, fatty acid profiles and lipid health indices were measured during storage. Alginate-chitosan interactions and the effect of gum were manifested in the FT-IR spectra. The inclusion of the gum in the gelation media allowed decreasing the oxidative damage during storage in comparison to the free oil and alginate-chitosan beads. The gum also improved wall material properties, providing higher oil retention during the drying step and subsequent storage. Fatty acids quality and lipid health indices were widely preserved in beads containing the gum. Present results showed a positive influence of the gum on oil encapsulation and stability, being the main mechanism attributed to a physical barrier effect.

  1. Genetic characterization of fast-growing rhizobia able to nodulate Prosopis alba in North Spain.

    Science.gov (United States)

    Iglesias, Olga; Rivas, Raúl; García-Fraile, Paula; Abril, Adriana; Mateos, Pedro F; Martinez-Molina, Eustoquio; Velázquez, Encarna

    2007-12-01

    Prosopis is a Mimosaceae legume tree indigenous to South America and not naturalized in Europe. In this work 18 rhizobial strains nodulating Prosopis alba roots were isolated from a soil in North Spain that belong to eight different randomly amplified polymorphic DNA groups phylogenetically related to Sinorhizobium medicae, Sinorhizobium meliloti and Rhizobium giardinii according to their intergenic spacer and 16S rRNA gene sequences. The nodC genes of isolates close to S. medicae and S. meliloti were identical to those of S. medicae USDA 1,037(T) and S. meliloti LMG 6,133(T) and accordingly all these strains were able to nodulate both alfalfa and Prosopis. These nodC genes were phylogenetically divergent from those of the isolates close to R. giardinii that were identical to that of R. giardinii H152(T) and therefore all these strains formed nodules in common beans and Prosopis. The nodC genes of the strains isolated in Spain were phylogenetically divergent from that carried by Mesorhizobium chacoense Pr-5(T) and Sinorhizobium arboris LMG 1,4919(T) nodulating Prosopis in America and Africa, respectively. Therefore, Prosopis is a promiscuous host which can establish symbiosis with strains carrying very divergent nodC genes and this promiscuity may be an important advantage for this legume tree to be used in reforestation.

  2. Formulation and sensory evaluation of Prosopis alba (Algarrobo) pulp cookies with increased iron and calcium dialyzabilities.

    Science.gov (United States)

    Bernardi, C; Drago, S; Sabbag, N; Sanchez, H; Freyre, M

    2006-03-01

    Prosopis alba (algarrobo) is an important indigenous specie, which fruits are used as food and feed since ancient times. Cookies containing algarrobo pulp (AP) with increased iron and calcium availabilities were formulated and sensory evaluated. AP is preferred as food ingredient because of its high sugar content and pleasant flavour. Formulated cookies mean proximal composition was 8.9 g/100 g protein, 7.2 g/100 g dietary fiber, 25 g/100 g total sugar, and 18.5 g/100 g crude fat with iron and calcium contents 30 ppm and 340 ppm, respectively. Ascorbic (AA) and citric (CA) acids at different mM acid: mM Fe were added in order to increase mineral availabilities being evaluated by an in vitro method. Those ratios were 5:1 and 10:1 for AA:Fe whereas for CA:Fe were 50:1 and 100:1 and combinations of them. After chosen the best AA:Fe and CA:Fe ratios (5:1 and 50:1, respectively), sensory evaluation with trained sensory panel and a consumer acceptability test with one hundred and seventy untrained judges were carried out. Acceptability test showed that 77.65% of the people ( 50 years old 15.89%) tasting final formulated cookies indicated that they "like very much" or "moderately like" and there were not consumers rejecting them.

  3. Albas y alboradas en el cancionero tradicional mexicano: herencia y cambio

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    Masera, Mariana

    1999-12-01

    Full Text Available The roots of some erotic motives in Mexican traditional songs in Spanish could be traced to the Medieval Popular Hispanic songs, as has been said by scholars. But, until now, nobody has studied in depth the relationship and diversity between the Mexican cancionero and old Spanish songs. In this article I shall analize the preservation of the Dawn motif, and all those associated with it, in Mexican Contemporary Songs and variation.Los antecedentes de algunos motivos eróticos de la poesía tradicional mexicana contemporánea en español se pueden rastrear hasta las canciones populares hispánicas de la Edad Media. Sin embargo, aún hoy no se han estudiado en profundidad las relaciones y desencuentros entre la canción popular mexicana y la antigua canción peninsular; por ello, este trabajo se propone como un primer análisis. El estudio resalta la originalidad de las coplas mexicanas a través de un estudio comparativo del motivo del alba.

  4. Sequence and expression characteristics of a nuclear-encoded chloroplast sigma factor from mustard (Sinapis alba).

    Science.gov (United States)

    Kestermann, M; Neukirchen, S; Kloppstech, K; Link, G

    1998-06-01

    Plant chloroplasts contain transcription factors that functionally resemble bacterial sigma factors. We have cloned the full-length cDNA from mustard (Sinapis alba) for a 53 kDa derived polypeptide that contains similarity to regions 1.2-4.2 of sigma70-type factors. The amino acid sequence at the N-terminus has characteristics of a chloroplast transit peptide. An in vitro synthesized polypeptide containing this region was shown to be imported into the chloroplast and processed. The recombinant factor lacking the N-terminal extension was expressed in Escherichia coli and purified. It confers the ability on E.coli core RNA polymerase to bind specifically to a DNA fragment that contains the chloroplast psbA promoter. Transcription of the psbA template by E.coli core enzyme in the presence of recombinant SIG1 results in enhanced formation of transcripts of the size expected for correct initiation at the in vivo start site. Together, these data suggest that the mature protein acts as one of the chloroplast transcription factors in mustard. RNA gel blot hybridization reveals a transcript at approximately 1.8 kb, which is more abundant in light-grown than in dark-grown mustard seedlings.

  5. Vozes e temas que perpassam o discurso curricular do curso de Letras = Voices and themes which cross the curricular discourse of Letras course

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    Eliana Merlin Deganutti de Barros

    2010-07-01

    Full Text Available Este artigo objetiva analisar e discutir o Projeto Político Pedagógico do currículo do curso de Letras da UEL – licenciatura em Língua Portuguesa e respectivas literaturas – implantado em 2006. As discussões levantadas giram em torno das temáticas que atravessam a discursividade do texto curricular, de como essas se configuram comovozes de discursos oficiais da educação e de como são abordadas pela textualidade do documento. Os temas detectados e discutidos à luz de teorias acerca de currículos são: desarticulação entre estudos linguísticos e literários; estudos linguísticos desvinculados douso da língua; articulação entre formação teórica e prática pedagógica; ensino reflexivo voltado para práticas investigativas; o papel da língua na sociedade; ética profissional; domínio dos novos recursos técnico-pedagógicos; e práticas democráticas da educação.Entre outras questões, a análise aponta como é recorrente o interdiscurso entre o texto curricular e os vários discursos oficiais da educação, esses materializados em documentos curriculares, diretrizes e parâmetros. This article aims to analyze and discuss the political-pedagogical project of the curriculum of Letras Course / UEL - degree in Portuguese language and its literature - implemented in 2006. The discussions concern the themes that cross the curricular textdiscursivity, how they are constituted as voices of the official education discourse and how they are dealt by the textuality of the document. The themes identified and discussed according to theories about curriculum are: disconnection between linguistic and literarystudies; language studies detached from the use of language; articulation between theoretical formation and teaching practice; reflective teaching towards investigative practices; the role of language in society; professional ethics; command of new technicaland pedagogical resources; democratic practices in education. Among other

  6. Diretrizes curriculares para o curso de pedagogia: trajetória longa e inconclusa Curricular guindelines for the pedagogy course: long and unfinished trajectory

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    Leda Scheibe

    2007-04-01

    Full Text Available Este artigo aborda as discussões e embates acerca da definição das diretrizes curriculares para o Curso de Pedagogia, ocorridos após a aprovação da Lei de Diretrizes e Bases da Educação Nacional de 1996. Focaliza o processo de mobilização e resistência das entidades do campo educacional no sentido de assegurar a docência como base para esse curso e a superação da dicotomia entre licenciatura e bacharelado no seu interior. A análise aponta como cerne do embate a contraposição ao modelo de formação dos Institutos Superiores de Educação e de Cursos Normais Superiores, veiculado pela reforma educacional da década de 1990, o qual se insere em um contexto de políticas neoliberais. Indica ainda que a recente aprovação de diretrizes curriculares para o Curso de Pedagogia (Parecer CNE/CP 5/2005 e Resolução CNE/CP 1/2006 e sua definição como uma licenciatura que forma unificadamente o professor para a educação infantil e anos iniciais do ensino fundamental, constitui uma solução negociada entre as entidades e o Conselho Nacional de Educação.This article addresses the discussions about the definition of curricular guidelines for the Pedagogy Course, as well as the oppositions to them, which occurred after the passage of the National Educational Guidelines and Framework Law of 1996. It focuses the process of mobilization and resistance of the institutions in the educational area in order to ensure teaching as the basis for this course and the overcoming of the dichotomy between teacher certification (licenciatura and bachelor degree in its interior. The analysis indicates that the central issue is the opposition to the education model of Higher Education Institutes and Higher Basic Education Teacher Education Programs, created by the education reform in the 1990s, which is inserted in a context of neoliberal policies. It also shows that the recent passage of the curricular guidelines for the Pedagogy Course (Official

  7. A importância do conhecimento escolar em propostas curriculares alternativas The importance of school knowledge for alternative curricular proposals

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    Antonio Flavio Barbosa Moreira

    2007-06-01

    Full Text Available O artigo focaliza um processo de construção curricular em uma escola da rede municipal de Belo Horizonte, no qual vigora a proposta oficial da ESCOLA PLURAL. Destaca as dificuldades vividas pelo corpo docente da escola e desenvolve o argumento de que propostas curriculares inovadoras podem criar um espaço discursivo no qual se segregam as crianças das camadas populares, reduzindo suas possibilidades de autonomia na sociedade. Com base nas concepções de política de Stephen Ball e Jenny Ozga, analisam-se os textos políticos da Escola Plural e de uma escola da rede municipal. Verificou-se a complexa relação entre documentos oficiais e experiências locais, bem como a necessidade de se afirmar a importância do conhecimento escolar no currículo. Argumenta-se que a supervalorização do aluno e de suas experiências culturais, em associação com a secundarização do conhecimento escolar, pode criar um espaço em que a criança seja confinada e jamais vista como normal.The paper focuses on a process of curriculum construction which was developed in a school from the Belo Horizonte educational system. The school is organized according to the official curricular proposal entitled PLURAL SCHOOL. It emphasizes the difficulties which were faced by the academic staff of the school and argues that innovative curricular proposals may create a space in which children from working class are segregated and have their possibilities of autonomy in society reduced. Drawing on the conceptions of politics by Stephen Ball and Jenny Ozga, the political texts, written on the level of the Plural School proposal and on the level of the school, are analyzed. The complex relations among official documents and local experiences are emphasized. The importance of school knowledge is stressed. It is argued that the overvaluation of the students and their cultural experiences and the undervaluation of school knowledge can create a space in which children are

  8. Analysis of F1 hybrid and BC1 monosomic alien addition line plants from Brassica oleracea × Sinapis alba by GISH

    Institute of Scientific and Technical Information of China (English)

    WEI Wenhui; ZHANG Sufeng; LI Jun; WANG Lijun; CHEN Bo; FANG Xiaoping; WANG Zhuan; LUO Lixia

    2006-01-01

    Sterile and semi-fertile F1 plants were obtained by intergeneric sexual hybridization between paternal Brassica oleracea var. alboglabra (genome CC, 2n=18) and maternal Sinapis alba (genome SS, 2n=24), BC1 plants were obtained by backcrossing between paternal B. oleracea and maternal semi-fertile F1 plants. Genomic in situ hybridization (GISH) combined with dual-colour fluorescence in situ hybridization (dcFISH) showed that sterile F1 plants contained 21 chromosomes consisting of one B. oleracea chromosome set and one S.alba chromosome set, belonging to expected hybrids,and semi-fertile F1 plants contained 30 chromosomes consisting of two B. oleracea chromosome sets and one S. alba chromosome set. It is obvious that the semi-fertile F1 plants belong to unexpected hybrids.1 -3 trivalents were detected at meiotic metaphase I of semi-fertile F1 pollen mother cells (PMCs). Different separation ratios of S chromosomes were detected at anaphase I. A monosomic alien addition line(MAAL) was identified by GISH-dcFISH from BC1plants; it contained 19 chromosomes consisting of 18 C chromosomes and 1 S chromosome. At meiotic metaphase I, 9 divalents from B. oleracea and one univalent from S. alba could be detected. Sometimes,one putative C-S trivalent could also be detected.The achievement of B. oleracea-S, alba monosomic alien addition lines lays a foundation for gene introgression, location and cloning.

  9. What the MDP Debate Can Teach Us about Law Practice in the New Millennium and the Need for Curricular Reform.

    Science.gov (United States)

    Daly, Mary C.

    2000-01-01

    Provides a snapshot of the debate on multidisciplinary practice within the legal field, explores what lessons legal educators should take away from the debate, and examines the curricular implications of those lessons. (EV)

  10. Logic of knowledge harmonization, axis of curricular construction achieved thru communities of hermeneutic enlightenment

    Directory of Open Access Journals (Sweden)

    Gloria Clemencia VALENCIA GONZÁLEZ

    2013-06-01

    Full Text Available The present work investigates by the diverse logics of organization of the knowledge like axes of the curricular construction; for it, they develop two premises. First one approaches social the educative phenomenon like praxis in which it is possible to recognize diverse logics and histories of organization of the knowledge. Second it works around the image of the subjects like culture generators that make possible the flow of knowledge. In the closing it is indicated that curricula takes place and just moves in the emergent interstices of the relation and interaction between subjects. In such sense, the center of curricular attention moves of the architecture and the design towards the subjects that make them.

  11. Programa curricular de la segunda especialidad en formación magisterial

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    Elsa Tueros Way

    1993-06-01

    Full Text Available Este documento presenta las demandas para la formación de docentes objetivos de la Segunda Especialidad, se definen los perfiles real e ideal del docente de ISPs y se señalan los requisitos de los usuarios de este programa. Estos elementos sirven para sustentar la Estructura Curricular: Areas de estudio (Investigación Educativa,Teoría y Realidad Educativa, Diseño y Evaluación del Curriculum,y Desarrollo Comunal y Regional, el Plan de estudios y la descripciónde los cursos. Asimismo, se señala la estrategia que se empleará para el desarrollo curricular incluída la evaluación.

  12. The relationship of burnout, use of coping strategies and curricular program of registered nurses.

    Science.gov (United States)

    Ceslowitz, S B

    1990-03-01

    This study examined the relationships of nursing curricular program, burnout, and use of coping strategies among 150 randomly selected staff nurses from four hospitals. The instruments used were the frequency dimension of the Maslach Burnout Inventory (Maslach & Jackson, 1981) and the Ways of Coping (Revised) (Folkman & Lazarus, 1985). Discriminant analysis demonstrated that (a) diploma graduates differed from associate-degree graduates in their greater experience of Emotional Exhaustion (p less than .05) and (b) baccalaureate-degree graduates differed from associate-degree graduates in their greater use of Planful Problem Solving and Confronting Coping (p less than .05). Recommendations include additional research to discover relevant factors for the greater experience of Emotional Exhaustion among diploma graduates. If related to perceptions of limited career mobility due to the lack of a baccalaureate degree, expansion of educational opportunities is indicated. Another recommendation is curricular incorporation of content on burnout and coping.

  13. Ethical and Civic Education. Difficulties during the Curricular Reform in Argentine Patagonia

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    Isabelino Siede

    2015-04-01

    Full Text Available DOI: http://dx.doi.org/10.17227/01234870.41folios51.68 What type of ethical and civic education is effectively provided at school? This article analyzes the curricular prescriptions of Ethical and Citizenship Education in primary schools of the Argentine Patagonia, as well as its relations and contradictions with the school practices of moral education It inquires the process of definition of the area in the context of the Educational Reform in the 90s. Also, it pursuits to remake the way it was incorporated in the provincial curriculum design. Throughout focus groups and interviews to teachers from different public and private schools of three towns from de north of Santa Cruz, we analyze the descriptions and expectative of the teachers about their teaching practice in the moral area, as well as the possible causes of the differences and the contradictions between the policies of the curricular statement and educational proposals offered at school.

  14. One Health in food safety and security education: A curricular framework.

    Science.gov (United States)

    Angelos, J; Arens, A; Johnson, H; Cadriel, J; Osburn, B

    2016-02-01

    The challenges of producing and distributing the food necessary to feed an anticipated 9 billion people in developed and developing societies by 2050 without destroying Earth's finite soil and water resources present extremely complex problems that lack simple solutions. The ability of modern societies to adequately address these and other food-related problems will require an educated workforce trained not only in traditional food safety, security, and public health, but also in other areas including food production, sustainable practices, and ecosystem health. To help address the need for such an educated workforce, a curricular framework was developed to assist those tasked with designing education and training for future food systems workers. One sentence summary: A curricular framework for education and training in food safety and security was developed that incorporates One Health concepts.

  15. DISEÑO CURRICULAR: DE LA INTEGRACIÓN A LA COMPLEJIDAD

    Directory of Open Access Journals (Sweden)

    Eleonora Badilla Saxe

    2009-01-01

    Full Text Available En este ensayo se muestra un tránsito que podría seguir el diseño curricular desde la integración hacia la complejidad. Se parte de las ideas de James Beane y John Deswey sobre la Integración Curricular y las Actividades Ocupacionales respectivamente para pasar por los llamados Ejes Transversales y el Enfoque por Proyectos, con miras a evolucionar hacia la Pedagogía de la Complejidad, tomando como base las ideas para promover el pensamiento complejo que propone Edgar Morin. Como conclusión se propone un cambio en la metáfora con la cual se diseñan currículos y planes de estudio.

  16. Curricular Transformation of Education in the Field of Physical and Sport Education in Slovakia

    OpenAIRE

    Elena Bendíková

    2016-01-01

    The study presents basic information on the curricular transformation of physical and sport education in Slovakia after the year 1989, which is related to the education process in the 21st century. What is more, it points to the basis for modern transformation in relation to sports as well as to insufficient undergraduate teacher training and its consequences for the performance of newly qualified teachers. These findings are partially included in the grant VEGA no. 1/0376/14 Physical Activit...

  17. Addressing curricular innovation in a multi-stakeholder environment : Planning to change

    OpenAIRE

    Todd, Enslen

    2001-01-01

    As language innovations move outside the boundaries of autonomous departmental units, the process of change through the planning, design and implementation phases become more complex. Therefore, there is a greater need for awareness of the steps in the innovation process. This is especially true for the planning process since the adoption decision is divided amongst potentially numerous potential adopters. This paper will present a case study of curricular innovation, a move from an EAP to an...

  18. Adaptaciones curriculares: Convergencias y divergencias de su implementación en el profesorado chileno

    Directory of Open Access Journals (Sweden)

    Braulio Ademir Navarro-Aburto

    2016-01-01

    Full Text Available Recibido 13 de marzo de 2015 • Corregido 29 de octubre de 2015 • Aceptado 17 de noviembre de 2015La presente investigación describe el proceso que se realiza para llevar a cabo las adaptaciones curriculares, en la asignatura de matemática para el alumnado que presenta algún tipo de necesidad educativa especial transitoria. Se ha considerado la coordinación existente entre docentes de Matemática y de Educación Diferencial, como acción promotora de las adaptaciones curriculares. La metodología utilizada corresponde a la cualitativa con un enfoque fenomenológico, y la principal técnica de recolección de datos fue la entrevista semiestructurada, participantes de este estudio fueron 10 docentes de 2 instituciones educativas con programa de integración. Los principales hallazgos arrojan que profesorado y personal encargados del Programa de Integración Escolar cumplen con las normativas y requerimientos  del Decreto Nº 170 en relación con las adaptaciones curriculares, pero dicho cumplimiento está sujeto a la informalidad en la articulación y planificación debido a la falta de tiempo y recursos disponibles. De este modo, como conclusión se plantea que existe una necesidad constante de adaptaciones curriculares, pues son un mecanismo que permite lograr la individualización de la enseñanza, mejorando la calidad de vida y la educación especial en Chile.

  19. Seminarios didácticos y círculos curriculares.

    OpenAIRE

    Domènech Casal, Jordi

    2013-01-01

    En este instituto se aprovechan las reuniones del profesorado para aplicar dos dinámicas de formación entre iguales. Son los propios docentes quienes, en los seminarios didácticos, presentan prácticas innovadoras y, en los círculos curriculares, buscan puntos de conexión para emprender proyectos interdisciplinares. Además de compartir conocimiento, desarrollan una conciencia y una práctica investigadora e innovadora.

  20. BASE NACIONAL COMUM CURRICULAR: DESAFIOS E IMPLICAÇÕES PARA O ENSINO RELIGIOSO

    Directory of Open Access Journals (Sweden)

    Deyve Redyson

    2016-01-01

    Full Text Available Como um descritivo de saberes e conteúdos a serem ensinados e apreendidos específicos e necessários para cada seguimento da educação básica, no qual visa o desenvolvimento educacional brasileiro a Base Nacional Comum Curricular - BNCC propõe a composição a partir dos conhecimentos dos componentes curriculares que por sua vez, são articulados diante das áreas de conhecimentos, e o Ensino Religioso como uma modalidade de ensino insere-se nessas estratégias traçadas e discutidas pela BNCC em eleger os conhecimentos a serem dados na escola. É nessa perspectiva que esse estudo se torna relevante, pois tem como finalidade e objetivo analisar como os movimentos políticos (globais e locais estão articulando propostas curriculares para o Ensino Religioso, uma vez que esse ensino como área de conhecimento é complexa e desafiadora no contexto da diversidade cultural religiosa e muitas das vezes não considerado em seus componentes curriculares aspectos críticos. Metodologicamente esse estudo tem como lócus investigativo, os documentos oficiais nacionais (PNE, LDB, PCNs, entre outros e documentos locais que regem o Ensino Religioso. Faremos interlocuções bibliográficas com autores do campo do currículo pós-crítico e do Ensino Religioso como: Moreira e Silva (1997, Sacristán (2000, Junqueira e Oliveira (2006, Passos (2007, entre outros autores.

  1. Barriers to Curricular Change in General Education Mathematics at a Large Public Institution

    OpenAIRE

    Jorgensen, Marcus

    2014-01-01

    This qualitative study looked for barriers to curricular change in general education mathematics at a large public university (LPU) in the Western United States. The literature showed that a number of national organizations dealing in math education have recommended alternatives to the traditional algebra-intensive curriculum. LPU still relies predominantly on traditional College Algebra as its quantitative literacy (QL) course. With such an algebra-heavy emphasis, students may be missing mor...

  2. Educação com enfoque CTS em documentos curriculares regionais: o caso das diretrizes curriculares de física do estado do Paraná

    Directory of Open Access Journals (Sweden)

    Silmara Alessi Guebur Roehrig

    2014-12-01

    Full Text Available Acreditando que a consolidação do movimento que prioriza as relações entre ciência, tecnologia e sociedade (CTS na educação científica perpassa as decisões curriculares, buscamos compreender como esta vertente se insere nas Diretrizes Curriculares de física do Estado do Paraná (DCE/PR. Após caracterizarmos Educação com enfoque CTS, a partir de Ziman, Aikenhead e Yager, utilizamos a metodologia da Análise Textual Discursiva para estabelecer categorias de análise. A constituição dos dados se deu a partir da análise documental das DCE/PR de Física e de entrevistas com autores. Deste processo, emergiram as seguintes categorias de análise: aplicação da ciência, interdisciplinaridade, enfoques histórico, filosófico e sociológico, problematização, contextualização, tomada de decisões, currículo orientado no aluno, e cidadania. Os resultados apontam que, mesmo não tendo sido elaboradas com o propósito de favorecer a Educação com enfoque CTS, as DCE/PR de Física contemplam elementos que remetem às dimensões supracitadas.

  3. ¿Hacia una Nueva Arquitectura Financiera Regional? Problemas y perspectivas de la cooperación monetaria en el ALBA-TCP

    Directory of Open Access Journals (Sweden)

    Benzi, D.

    2016-05-01

    Full Text Available This paper addresses the experiences of the monetary and financial cooperation carried out within the framework of ALBA-TCP. The first part describes the context of global crisis and emerging multipolarity in which the debate on the reform of the International Financial Architecture (IFA and regional monetary initiatives are inserted. The second part revises the Latin American initiative of a New Regional Financial Architecture. Later, we analyze the origins, processes and effects of mechanisms implemented within the ALBA-TCP, such as the ALBA Bank and the SUCRE. Finally, the essay concludes by presenting both potential and limitations of these experiences within a regional and global scenario marked by a high degree of uncertainty that, paradoxically so far, seems to delay and inhibit rather than consolidate the strengthening of a New Regional Financial Architecture.

  4. Antioxidant Capacity and HPLC-DAD-MS Profiling of Chilean Peumo (Cryptocarya alba Fruits and Comparison with German Peumo (Crataegus monogyna from Southern Chile

    Directory of Open Access Journals (Sweden)

    Mario J. Simirgiotis

    2013-02-01

    Full Text Available Liquid chromatography (LC coupled with UV detection and electrospray ionization (ESI tandem mass spectrometry (MS/MS was used for the generation of chemical fingerprints and the identification of phenolic compounds in peumo fruits and aerial parts from southern Chile. Thirty three compounds (19 of these detected in C. alba and 23 in C. monogyna were identified, mainly flavonoid glycosides, phenolic acids, anthocyanins and flavonoid aglycons. Total phenolic content and total flavonoid content was measured for both species, and were higher in the extracts from C. monogyna fruits and aerial parts than extracts from C. alba. The fruits of Cryptocarya alba (Chilean peumo presented high antioxidant capacity (9.12 ± 0.01 mg/mL in the DPPH assay, but was three times lower to that of Crataegus monogyna (German peumo (3.61 ± 0.01 mg/mL in the DPPH assay.

  5. Caracterización del conocimiento didáctico del contenido curricular

    Directory of Open Access Journals (Sweden)

    Yolanda GOMEZ POVEDA

    2012-04-01

    Full Text Available El presente trabajo de maestría pretendió caracterizar el conocimiento didáctico del contenido curricular (CDCC de los profesores de ciencias respecto al concepto de discontinuidad de la materia, para ello establece una trama didáctica para la enseñanza de dicho concepto a partir de la elaboración de la trama histórica – epistemológica de los modelos teóricos precuánticos y cuánticos. La presente investigación es un estudio de caso que intentó incidir directamente en las profesoras de ciencias de la Institución Educativa Distrital Prospero Pinzón IED; se desarrolló bajo la metodología de investigación cualitativa interpretativa, enmarcada dentro de la línea de investigación didáctica de los contenidos curriculares en química, bajo el proyecto de investigación: conocimiento didáctico del contenido curricular de química (DQU025-07 y el diseño de tramas conceptuales (Parga y Martínez, 2006.

  6. Curricular guidelines and citizenship attitudes in Latin American students: a comparative analysis

    Directory of Open Access Journals (Sweden)

    Martín Bascopé, Chile

    2015-07-01

    Full Text Available (analítico: Los currículos son progresivamente relevantes para educar futuros ciudadanos activos. En este contexto, se vuelve fundamental explorar la relación entre las directrices curriculares y cómo la educación ciudadana es efectivamente alcanzada por los estudiantes en países Latinoamericanos. Por ello este artículo tiene por objetivo evaluar comparativamente la visión institucional expresada en cada currículum y las perspectivas de los estudiantes sobre asuntos ciudadanos. El análisis factorial exploratorio y el análisis estadístico descriptivo curricular se basan en dos fuentes valiosas y complementarias, respectivamente: El Estudio Internacional de Educación Cívica y Ciudadana (ICCS y el Sistema Regional de Competencias de Ciudadanía (Sredecc. Luego de una comparación sistemática de ambas fuentes este estudio revela que varios aspectos curriculares son coherentes con las actitudes y creencias de los estudiantes, y sugiere pautas para mejorar y expandir la educación ciudadana en América Latina, considerando la importancia de esta para la formación de una ciudadanía activa.

  7. The curricular training and the didactics in training of teachers: challenges and possibilities

    Directory of Open Access Journals (Sweden)

    Cyntia Graziella Guizelim Simões Girotto

    2013-01-01

    Full Text Available In this paper we addressed aspects of the disciplines “Curricular Training” and “Didactics” in the Pedagogy Course in training of teachers. The main objective is to emphasize upon submission of the work that we do in our teaching practice in the mentioned disciplines, the importance of linking the theory and the practice in training of teachers so that the teaching in the university it is not decontextualized but enriched with the issues of everyday school life. In this sense, we address, initially, the aspects of the Curricular training as a mediator link of the learning, of the articulation of the curriculum and of the practices and, in this view, as a productive conduit between the university and the basic education, stressing the need for the reception of the contribution that each institutions within its specificity, must provide in the training courses. In sequence, we present aspects of the structure of the work we do with our students in Early Childhood Education Curricular Training. Finally, are detailed the aspects of a Didactics for the teachers of early childhood education and for the early years of Fundamental Education, focusing on narratives of in-service teachers on their experiences teaching in search of new systematization of pedagogical practice and on by own teachers.

  8. El potencial curricular de los libros de texto para generar experiencias de aprendizaje

    Directory of Open Access Journals (Sweden)

    Cesar Rodríguez Hidalgo

    2013-01-01

    Full Text Available El presente artículo versa sobre el potencial curricular que tienen los libros de texto para fa- vorecer el aprendizaje del alumnado. Valorar los libros de texto constituye una estrategia importante, en virtud del aporte que los mismos pueden dar para la conversión del currículo prescrito en currículo real. En la selección de los libros de texto que van a ser utilizados durante un curso lectivo, deben privar ra- zones académicas, por lo cual es necesario ponderar cualidades como sus criterios de calidad, los factores innovadores y la mediación que propician entre el plan de estudios y el desempeño docente en la clase. Como material curricular, los libros de texto representan una organización específica de los procesos de enseñanza, a partir de una planificación que sustenta su uso y le concede un sentido trascendente dentro del ámbito educativo. La temática se aborda desde la teoría curricular en virtud de que el currículo con- stituye el puente entre lo teórico y lo práctico, enlace que se hace manifiesto ante la utilización del libro de texto.

  9. Medical student mental health 3.0: improving student wellness through curricular changes.

    Science.gov (United States)

    Slavin, Stuart J; Schindler, Debra L; Chibnall, John T

    2014-04-01

    Medical education can have significant negative effects on the well-being of medical students. To date, efforts to improve student mental health have focused largely on improving access to mental health providers, reducing the stigma and other barriers to mental health treatment, and implementing ancillary wellness programs. Still, new and innovative models that build on these efforts by directly addressing the root causes of stress that lie within the curriculum itself are needed to properly promote student wellness. In this article, the authors present a new paradigm for improving medical student mental health, by describing an integrated, multifaceted, preclinical curricular change program implemented through the Office of Curricular Affairs at the Saint Louis University School of Medicine starting in the 2009-2010 academic year. The authors found that significant but efficient changes to course content, contact hours, scheduling, grading, electives, learning communities, and required resilience/mindfulness experiences were associated with significantly lower levels of depression symptoms, anxiety symptoms, and stress, and significantly higher levels of community cohesion, in medical students who participated in the expanded wellness program compared with those who preceded its implementation. The authors discuss the utility and relevance of such curricular changes as an overlooked component of change models for improving medical student mental health.

  10. Protective Effects of Morus alba Leaves Extract on Ocular Functions of Pups from Diabetic and Hypercholesterolemic Mother Rats

    Directory of Open Access Journals (Sweden)

    H.I.H. El-Sayyad, M.A. El-Sherbiny, M.A. Sobh, A.M. Abou-El-Naga, M.A.N. Ibrahim, S.A. Mousa

    2011-01-01

    Full Text Available Phytotherapy is frequently considered to be less toxic and free from side effects than synthetic drugs. Hence, the present study was designed to investigate the protective use of crude water extract of Morus alba leaves on ocular functions including cataractogenesis, biochemical diabetic and hypercholesterolemic markers, retinal neurotransmitters and retinopathy of rat pups maternally subjected to either diabetes and/or hypercholesterolemia. Application of crude water extract of Morus alba resulted in amelioration of the alterations of maternal serum glucose, LDL, HDL, total cholesterol and creatine phosphokinase activity as well as retinal neurotransmitters including acetylcholine (ACE, adrenaline (AD, nor-adrenaline (NAD, serotonin (5-HT, histamine (HS, dopamine (DA and gamma amino butyric acid (GABA. The retina of pups of either diabetic and/or hypercholesterolemia mothers exhibited massive alterations of retinal neurotransmitters. The alterations of retinal neurotransmitters were correlated with the observed pathological alterations of retinal pigmented epithelium, photoreceptor inner segment and ganglion cells and increased incidence of DNA fragmentation and apoptosis cell death. However, protection with Morus alba extract led to amelioration of the pathological alterations of retinal neurons and estimated neurotransmitters. Furthermore, a striking incidence of cataract was detected in pups of either diabetic and/or hypercholesterolemic mothers. Highest cataractogenesis was observed in pups of combined -treated groups. Our data indicate that experimental maternal diabetes alone or in combination with hypercholesterolemia led to alteration in the ocular structures of their pups, with an increasing incidence of cataract and retinopathy, and the effects of the extract might be attributed to the hypoglycaemic, antihypercholesterolemic and anti-oxidative potential of flavonoids, the major components of the plant extract.

  11. Participation of the GABAergic system in the anesthetic effect of Lippia alba (Mill.) N.E. Brown essential oil

    Energy Technology Data Exchange (ETDEWEB)

    Heldwein, C.G.; Silva, L.L. [Departamento de Farmácia Industrial, Universidade Federal de Santa Maria, Santa Maria, RS (Brazil); Reckziegel, P. [Departamento de Fisiologia e Farmacologia, Universidade Federal de Santa Maria, Santa Maria, RS (Brazil); Barros, F.M.C. [Departamento de Farmácia Industrial, Universidade Federal de Santa Maria, Santa Maria, RS (Brazil); Bürger, M.E.; Baldisserotto, B. [Departamento de Fisiologia e Farmacologia, Universidade Federal de Santa Maria, Santa Maria, RS (Brazil); Mallmann, C.A. [Departamento de Medicina Veterinária Preventiva, Universidade Federal de Santa Maria, Santa Maria, RS (Brazil); Schmidt, D.; Caron, B.O. [Departamento de Ciências Agronômicas e Ambientais, Universidade Federal de Santa Maria, Campus de Frederico Westphalen, Frederico Westphalen, RS (Brazil); Heinzmann, B.M. [Departamento de Farmácia Industrial, Universidade Federal de Santa Maria, Santa Maria, RS (Brazil)

    2012-04-05

    The objective of this study was to identify the possible involvement of the GABAergic system in the anesthetic effect of Lippia alba essential oil (EO). We propose a new animal model using silver catfish (Rhamdia quelen) exposed to an anesthetic bath to study the mechanism of action of EO. To observe the induction and potentiation of the anesthetic effect of EO, juvenile silver catfish (9.30 ± 1.85 g; 10.15 ± 0.95 cm; N = 6) were exposed to various concentrations of L. alba EO in the presence or absence of diazepam [an agonist of high-affinity binding sites for benzodiazepinic (BDZ) sites coupled to the GABA{sub A} receptor complex]. In another experiment, fish (N = 6) were initially anesthetized with the EO and then transferred to an anesthetic-free aquarium containing flumazenil (a selective antagonist of binding sites for BDZ coupled to the GABA{sub A} receptor complex) or water to assess recovery time from the anesthesia. In this case, flumazenil was used to observe the involvement of the GABA-BDZ receptor in the EO mechanism of action. The results showed that diazepam potentiates the anesthetic effect of EO at all concentrations tested. Fish exposed to diazepam and EO showed faster recovery from anesthesia when flumazenil was added to the recovery bath (12.0 ± 0.3 and 7.2 ± 0.7, respectively) than those exposed to water (9.2 ± 0.2 and 3.5 ± 0.3, respectively). In conclusion, the results demonstrated the involvement of the GABAergic system in the anesthetic effect of L. alba EO on silver catfish.

  12. Fractional CO 2 laser as an effective modality in treatment of striae alba in skin types III and IV

    Directory of Open Access Journals (Sweden)

    Farahnaz Fatemi Naein

    2012-01-01

    Full Text Available Context: Rapid stretching of the skin over the weak connective tissue leads to development of striae distensae. Recently, researchers have shown special interest towards use of fractional photothermolysis in treatment of striae and several studies have shown its usefulness. Our aim was to assess the efficacy of Fractional CO 2 laser in treatment of striae alba. Materials and Methods: A randomized clinical trial was carried out in female patients with striae alba. Ninety two striae were randomly selected and divided into two groups. Five sessions of laser resurfacing, were performed in Group 1, every 2-4 weeks. Group 2 was treated with 10% glycolic acid+0.05% tretinoin cream nightly during the study. Photographs were taken from the striae before and two weeks after the end of treatment. Mean surface area of striae compared between two groups. Patients′ views regarding the degree of improvement were assessed via visual analogue scale (VAS. Results: Forty six striae in Group 1 underwent laser resurfacing and 46 matched striae in Group 2, were treated with topical cream. Mean difference of striae surface area, was significantly decreased after treatment in Group 1 (-37.1±15.6 cm 2 in comparison with Group 2 (-7.9±9 cm 2 (P value >0.001. Mean VAS was significantly higher in Group 1 (3.05±0.74 compared to Group 2 (0.63±0.66 (P value >0.001. Conclusions: Fractional photothermolysis via Fractional CO 2 laser seems to be an effective method for treatment of striae alba.

  13. Participation of the GABAergic system in the anesthetic effect of Lippia alba (Mill. N.E. Brown essential oil

    Directory of Open Access Journals (Sweden)

    C.G. Heldwein

    2012-05-01

    Full Text Available The objective of this study was to identify the possible involvement of the GABAergic system in the anesthetic effect of Lippia alba essential oil (EO. We propose a new animal model using silver catfish (Rhamdia quelen exposed to an anesthetic bath to study the mechanism of action of EO. To observe the induction and potentiation of the anesthetic effect of EO, juvenile silver catfish (9.30 ± 1.85 g; 10.15 ± 0.95 cm; N = 6 were exposed to various concentrations of L. alba EO in the presence or absence of diazepam [an agonist of high-affinity binding sites for benzodiazepinic (BDZ sites coupled to the GABA A receptor complex]. In another experiment, fish (N = 6 were initially anesthetized with the EO and then transferred to an anesthetic-free aquarium containing flumazenil (a selective antagonist of binding sites for BDZ coupled to the GABA A receptor complex or water to assess recovery time from the anesthesia. In this case, flumazenil was used to observe the involvement of the GABA-BDZ receptor in the EO mechanism of action. The results showed that diazepam potentiates the anesthetic effect of EO at all concentrations tested. Fish exposed to diazepam and EO showed faster recovery from anesthesia when flumazenil was added to the recovery bath (12.0 ± 0.3 and 7.2 ± 0.7, respectively than those exposed to water (9.2 ± 0.2 and 3.5 ± 0.3, respectively. In conclusion, the results demonstrated the involvement of the GABAergic system in the anesthetic effect of L. alba EO on silver catfish.

  14. Essential oil of Lippia alba and its main constituent citral block the excitability of rat sciatic nerves

    Directory of Open Access Journals (Sweden)

    D.G. Sousa

    2015-08-01

    Full Text Available Lippia alba is empirically used for infusions, teas, macerates, and hydroalcoholic extracts because of its antispasmodic, analgesic, sedative, and anxiolytic effects. Citral is a mixture of trans-geranial and cis-neral and is the main constituent of L. alba essential oil and possesses analgesic, anxiolytic, anticonvulsant, and sedative effects. The present study evaluated the effects of the essential oil of L. alba (EOLa and citral on compound action potentials (CAPs in Wistar rat sciatic nerves. Both drugs inhibited CAP in a concentration-dependent manner. The calculated half-maximal inhibitory concentrations (IC50 of peak-to-peak amplitude were 53.2 µg/mL and 35.00 µg/mL (or 230 µM for EOLa and citral, respectively. Peak-to-peak amplitude of the CAP was significantly reduced by 30 µg/mL EOLa and 10 µg/mL citral. EOLa and citral (at 60 and 30 µg/mL, values close to their respective IC50 for CAP blockade significantly increased chronaxy and rheobase. The conduction velocity of the first and second CAP components was statistically reduced to ∼86% of control with 10 µg/mL EOLa and ∼90% of control with 3 µg/mL citral. This study showed that EOLa inhibited nerve excitability and this effect can be explained by the presence of citral in its composition. Both EOLa and citral showed inhibitory actions at lower concentrations compared with other essential oils and constituents with local anesthetic activity. In conclusion, these data demonstrate that EOLa and citral are promising agents in the development of new drugs with local anesthetic activity.

  15. Participation of the GABAergic system in the anesthetic effect of Lippia alba (Mill.) N.E. Brown essential oil.

    Science.gov (United States)

    Heldwein, C G; Silva, L L; Reckziegel, P; Barros, F M C; Bürger, M E; Baldisserotto, B; Mallmann, C A; Schmidt, D; Caron, B O; Heinzmann, B M

    2012-05-01

    The objective of this study was to identify the possible involvement of the GABAergic system in the anesthetic effect of Lippia alba essential oil (EO). We propose a new animal model using silver catfish (Rhamdia quelen) exposed to an anesthetic bath to study the mechanism of action of EO. To observe the induction and potentiation of the anesthetic effect of EO, juvenile silver catfish (9.30 ± 1.85 g; 10.15 ± 0.95 cm; N = 6) were exposed to various concentrations of L. alba EO in the presence or absence of diazepam [an agonist of high-affinity binding sites for benzodiazepinic (BDZ) sites coupled to the GABA A receptor complex]. In another experiment, fish (N = 6) were initially anesthetized with the EO and then transferred to an anesthetic-free aquarium containing flumazenil (a selective antagonist of binding sites for BDZ coupled to the GABA A receptor complex) or water to assess recovery time from the anesthesia. In this case, flumazenil was used to observe the involvement of the GABA-BDZ receptor in the EO mechanism of action. The results showed that diazepam potentiates the anesthetic effect of EO at all concentrations tested. Fish exposed to diazepam and EO showed faster recovery from anesthesia when flumazenil was added to the recovery bath (12.0 ± 0.3 and 7.2 ± 0.7, respectively) than those exposed to water (9.2 ± 0.2 and 3.5 ± 0.3, respectively). In conclusion, the results demonstrated the involvement of the GABAergic system in the anesthetic effect of L. alba EO on silver catfish.

  16. Essential oil of Lippia alba and its main constituent citral block the excitability of rat sciatic nerves.

    Science.gov (United States)

    Sousa, D G; Sousa, S D G; Silva, R E R; Silva-Alves, K S; Ferreira-da-Silva, F W; Kerntopf, M R; Menezes, I R A; Leal-Cardoso, J H; Barbosa, R

    2015-08-01

    Lippia alba is empirically used for infusions, teas, macerates, and hydroalcoholic extracts because of its antispasmodic, analgesic, sedative, and anxiolytic effects. Citral is a mixture of trans-geranial and cis-neral and is the main constituent of L. alba essential oil and possesses analgesic, anxiolytic, anticonvulsant, and sedative effects. The present study evaluated the effects of the essential oil of L. alba (EOLa) and citral on compound action potentials (CAPs) in Wistar rat sciatic nerves. Both drugs inhibited CAP in a concentration-dependent manner. The calculated half-maximal inhibitory concentrations (IC50) of peak-to-peak amplitude were 53.2 µg/mL and 35.00 µg/mL (or 230 µM) for EOLa and citral, respectively. Peak-to-peak amplitude of the CAP was significantly reduced by 30 µg/mL EOLa and 10 µg/mL citral. EOLa and citral (at 60 and 30 µg/mL, values close to their respective IC50 for CAP blockade) significantly increased chronaxy and rheobase. The conduction velocity of the first and second CAP components was statistically reduced to ∼86% of control with 10 µg/mL EOLa and ∼90% of control with 3 µg/mL citral. This study showed that EOLa inhibited nerve excitability and this effect can be explained by the presence of citral in its composition. Both EOLa and citral showed inhibitory actions at lower concentrations compared with other essential oils and constituents with local anesthetic activity. In conclusion, these data demonstrate that EOLa and citral are promising agents in the development of new drugs with local anesthetic activity.

  17. Inhibition of cytotoxicity of Shiga toxin of Escherichia coli O157:H7 on vero cells by Prosopis alba Griseb (Fabaceae) and Ziziphus mistol Griseb (Rhamnaceae) extracts.

    Science.gov (United States)

    Pellarín, M G; Albrecht, C; Rojas, M J; Aguilar, J J; Konigheim, B S; Paraje, M G; Albesa, I; Eraso, A J

    2013-10-01

    The capacity of Prosopis alba Griseb. and Ziziphus mistol Griseb. fruit extracts to inhibit the toxic action of Shiga toxin (Stx) was investigated. Purification of Stx from Escherichia coli O157:H7 was performed by saline precipitation and affinity chromatography using a column with globotriaosylceramide, while the fruits were subjected to ethanolic or aqueous extractions. The protective action of both fruits was determined by pre-, co-, and postincubation of one 50% cytotoxic dose per ml of Stx with different concentrations of ethanolic and aqueous extracts in confluent monolayers of Vero cells for 72 h at 37°C (5% CO2). The inhibition of the cytotoxic effect of Stx by fruit extracts was determined by the neutral red vital staining technique. The extraction of the polyphenols and flavonoids was effective, and more polyphenols per milligram of dissolved solids were obtained from P. alba than from Z. mistol. However, there were more flavonoids in Z. mistol than in P. alba. Components of both fruits increased the viability of cells treated with Stx when the extracts were preincubated with Stx for 1 h before being applied to the cell cultures, with the ethanolic extract of P. alba showing 95% cell viability at a concentration of 2.45 mg/ml. The extracts were less effective in protecting cells when Stx, extracts, and cells were coincubated together without a previous incubation of Stx; only the concentrations of 19.46 mg/ml for the P. alba aqueous extract and 3.75 mg/ml for the Z. mistol ethanolic extract resulted in the inhibition of cytotoxicity, with 52 and 56% cell viability occurring, respectively. Investigation into this difference in the protection of cells indicated that the protein molecule of Stx suffered degradation to advanced oxidative protein products during preincubation with extracts, principally with P. alba, which exhibited a greater amount of nonflavonoid polyphenols than Z. mistol. The prooxidant action on Stx favored the cells and enhanced the

  18. Plant regeneration from single-nodal-stem explants of legume tree Prosopis alba Griseb.

    Science.gov (United States)

    Castillo de Meier, G; Bovo, O A

    2000-08-01

    Seeds of Prosopis alba were scarified with abrasive paper and placed to germinate on MS (Murashige and Skoog 1962) nutrient medium. After 7 days of culture, the basal part of cotyledons was removed and pieces of 4 mm" from distal parts were cultured on Murashige and Skoog (1962) mineral salts and vitamins (MS) (3% sucrose) supplemented with growth regulators. Callus proliferation took place in the majority of the media tested. A low percentage of calluses with green buds that developed on MS basal medium containing 0.1 mg.L-1 2,4-D alone or supplemented with BAP at 0.1 mg.L-1 was observed. Neither cotyledonary segments in any medium assayed regenerated the whole plants. Bud elongation (near 70%) was achieved when single-nodal-stem segments cut from 20 days old seedlings were cultured on MS salts supplemented with 3 mg.L-1 NAA or 3 mg.L-1 IBA combined with 0.05 mg.L-1 KIN after 60 days in culture. Multiple shoots per bud were also observed. Single-nodal-stem segments from five-year-old plants were also cultured on the same media used for seedling explants. Maximal frequency of explants with bud elongation (near 70%) was found on MS with 0.1 mg.L-1 NAA plus 1 mg.L-1 BAP after 60 days of culture. Single-nodal-stem explants cut from adult trees (more than 20 years) were also employed, but the number of bud elongation was lesser. For rooting, the elongated shoots were transferred to a semisolid or liquid MS culture medium employing a paper bridge, supplemented with 0.5 mg.L-1 IBA or 0.1 mg.L-1 NAA.

  19. Self-(in)compatibility inheritance and allele-specific marker development in yellow mustard (Sinapis alba).

    Science.gov (United States)

    Zeng, Fangqin; Cheng, Bifang

    2014-01-01

    Yellow mustard (Sinapis alba) has a sporophytic self-incompatibility reproduction system. Genetically stable self-incompatible (SI) and self-compatible (SC) inbred lines have recently been developed in this crop. Understanding the S haplotype of different inbred lines and the inheritance of the self-(in)compatibility (SI/SC) trait is very important for breeding purposes. In this study, we used the S-locus gene-specific primers in Brassica rapa and Brassica oleracea to clone yellow mustard S-locus genes of SI lines Y514 and Y1130 and SC lines Y1499 and Y1501. The PCR amplification results and DNA sequences of the S-locus genes revealed that Y514 carried the class I S haplotype, while Y1130, Y1499, and Y1501 had the class II S haplotype. The results of our genetic studies indicated that self-incompatibility was dominant over self-compatibility and controlled by a one-gene locus in the two crosses of Y514 × Y1499 and Y1130 × Y1501. Of the five S-locus gene polymorphic primer pairs, Sal-SLGI and Sal-SRKI each generated one dominant marker for the SI phenotype of Y514; Sal-SLGII and Sal-SRKII produced dominant marker(s) for the SC phenotype of Y1501 and Y1499; Sal-SP11II generated one dominant marker for Y1130. These markers co-segregated with the SI/SC phenotype in the F2 populations of the two crosses. In addition, co-dominant markers were developed by mixing the two polymorphic primer pairs specific for each parent in the multiplex PCR, which allowed zygosity to be determined in the F2 populations. The SI/SC allele-specific markers have proven to be very useful for the selection of the desirable SC genotypes in our yellow mustard breeding program.

  20. Biphasic effects of Morus alba leaves green tea extract on mice in chronic forced swimming model.

    Science.gov (United States)

    Sattayasai, Jintana; Tiamkao, Siriporn; Puapairoj, Prapawadee

    2008-04-01

    In this study, the effects of an aqueous extract of Morus alba leaves green tea (ME) on mouse behaviors (depression, anxiety, climbing activity and thermal response), muscle coordination and muscle strength were studied. Male IRC mice received a single intraperitoneal injection of either the ME, desipramine or diazepam. Thirty minutes after injection, the mice were tested in all experimental models. A significant antidepressant-like effect could be detected in the animals receiving either 100 or 200 mg/kg ME. The effect of 200 mg/kg ME in decreasing the immobility time was comparable to 10 mg/kg desipramine. With higher dose (1000 mg/kg), a significant increase in immobility time could be observed. In the elevated plus maze, no increase in time in the open arm could be observed in mice treated with ME at either 100 or 200 mg/kg. However, high doses of ME (500 or 1000 mg/kg) decreased both time in the open arm and the number of entries in the maze. No change in thermal response could be seen in mice treated with ME at doses up to 500 mg/kg, however, at 1000 mg/kg, the response time to heat was increased significantly. The ME at either 500 or 1000 mg/kg also decreased muscle coordination, strength and climbing activity significantly when compared with the control. This study suggests that ME possesses an antidepressant- without an anxiolytic-like effect, however, at high doses, the extract might show the sedative effect and alter other functions such as muscle strength, animal activity in the maze and pain response.

  1. [Cloning and prokaryotic expression analysis of HDS from Salvia miltiorrhiza bge.f.alba].

    Science.gov (United States)

    Jiang, Dan; Rong, Qi-Xian; Yuan, Qing-Jun; Zhang, Wen-Jing; Zhang, Yong-Qing; Huang, Lu-Qi

    2014-11-01

    According to the designed specific primers of gene fragment based on the Salvia miltiorrhiza transcriptome data, with the method of reverse transcription polymerase chain reaction (RT-PCR), this study cloned full-length cDNA sequence of 1-hydroxy-2-methyl-2-(E)-butenyl-4-diphosphate synthase gene from Salvia miltiorrhiza bge.f.alba, this sequence is named as SmHDS and its GenBank registration number is KJ746807. SmHDS, 2 529 bp long, contains an ORF of 2 229 bp, encodes 742 amino acids, including 5' UTR 170 bp and 3' UTR 130 bp. Using bioinformatics software, having made a homology analysis of the obtained sequence, we can have a conclusion that SmHDS have a close genetic relationship with HDS of Salvia miltiorrhiza. Analysis result of prokaryotic expression revealed that in Escherichia coli, SmHDS expressed target proteins which in size are comparable with the protein predicted. Meanwhile, the 4 factors which can influence the protein expression were optimized, the 4 factors are inducing temperature, inducing time, IPTG concentrations and density of inducing host bacterium (A600). The optimal expression conditions of SmHDS were 30 degrees C until the A600 is 0.6, and add IPTG to a final concentration of 0.2 mmol x L(-1), and the induction time of 20 h. It provides theoretical basis for the further study of the function of 1-hydroxy-2-methyl-2-(E)-butenyl-4-diphosphate synthase in the biosynthesis of tanshinone compounds.

  2. The antimicrobial efficacy of Lippia alba essential oil and its interaction with food ingredients

    Directory of Open Access Journals (Sweden)

    Terezinha Feitosa Machado

    2014-06-01

    Full Text Available The objective of this study was to evaluate the antimicrobial potential of Lippia alba essential oil (EOLa and to investigate the effect of food ingredients on its efficacy. The antimicrobial potential of the oil was determined by the presence or absence of inhibition zones, minimum inhibitory concentration (MIC and minimum bactericidal concentration (MBC against Escherichia coli, Listeria innocua, Listeria monocytogenes, Pseudomonas aeruginosa, Salmonella choleraesuis and Staphylococcus aureus. The effect of food ingredients and the pH on the antimicrobial efficacy of oil was assessed by monitoring the maximum growth rate of Listeria monocytogenes in model media. The model media included potato starch (0, 1, 5 or 10%, beef extract (1, 5, 3, 6 or 12%, sunflower oil (0, 5 or 10% and TSB broth at pH levels of 4, 5, 6 or 7. The EOLa showed efficacy at all concentrations (50%, 25%, 6.25%, 3%, 1.5%, 0.8%, 0.4% and 0.2% evaluated, against all bacterial species, Gram-positive and Gram-negative. The antimicrobial efficacy of EO was found to be a function of ingredient manipulation. Proteins and lipids had a negative impact on the oil effectiveness, indicating the protective action of both on the microbial specie tested. On the contrary, at the highest concentration of starch (10%, the lower rate growth of L. monocytogenes was detected, therefore indicating a positive effect of carbohydrates on the oil effectivenes. Regarding the pH, the studies showed that the rate of microbial growth increased with increasing pH. It was concluded that the use of EOLa is more effective control pathogenic and spoilage bacteria when applied to starchy foods under an acidic pH.

  3. N-containing sugars from Morus alba and their glycosidase inhibitory activities.

    Science.gov (United States)

    Asano, N; Oseki, K; Tomioka, E; Kizu, H; Matsui, K

    1994-06-17

    The reexamination of N-containing sugars from the roots of Morus alba by improved purification procedures led to the isolation of eighteen N-containing sugars, including seven that were isolated from the leaves of Morus bombycis. These N-containing sugars are 1-deoxynojirimycin (1), N-methyl-1-deoxynojirimycin (2), fagomine (3), 3-epi-fagomine (4), 1,4-dideoxy-1,4-imino-D-arabinitol (5), 1,4-dideoxy-1,4-imino-D-ribitol (6), calystegin B2 (1 alpha,2 beta,3 alpha,4 beta-tetrahydroxy-nor-tropane, 7), calystegin C1 (1 alpha,2 beta,3 alpha,4 beta,6 alpha-pentahydroxy-nor-tropane, 8), 1,4-dideoxy-1,4-imino-(2-O-beta-D-glucopyranosyl)-D-arabinitol (9), and nine glycosides of 1. These glycosides consist of 2-O- and 6-O-alpha-D-galactopyranosyl-1-deoxynojirimycins (10 and 11, respectively), 2-O-, 3-O- and 4-O-alpha-D-glucopyranosyl-1-deoxynojirimycins (12, 13, and 14, respectively), and 2-O-, 3-O-, 4-O- and 6-O-beta-D-glucopyranosyl-1-deoxynojirimycins (15, 16, 17, and 18, respectively). Compound 4 is a new member of polyhydroxylated piperidine alkaloids, and the isolation of 6 is the first report of its natural occurrence. It has recently been found that the polyhydroxy-nor-tropane alkaloids possess potent glycosidase inhibitory activities. Calystegin A3 is the trihydroxy-nor-tropane, and calystegins B1 and B2 are the tetrahydroxy-nor-tropane. Calystegin C1, a new member of calystegins, is the first naturally occurring pentahydroxy-nor-tropane alkaloid. The inhibitory activities of these compounds were investigated against rat digestive glycosidases and various commercially available glycosidases.

  4. The antimicrobial efficacy of Lippia alba essential oil and its interaction with food ingredients.

    Science.gov (United States)

    Machado, Terezinha Feitosa; Nogueira, Nádia Accioly P; de Cássia Alves Pereira, Rita; de Sousa, Cívita Teixeira; Batista, Valéria Chaves Vasconcelos

    2014-01-01

    The objective of this study was to evaluate the antimicrobial potential of Lippia alba essential oil (EOLa) and to investigate the effect of food ingredients on its efficacy. The antimicrobial potential of the oil was determined by the presence or absence of inhibition zones, minimum inhibitory concentration (MIC) and minimum bactericidal concentration (MBC) against Escherichia coli, Listeria innocua, Listeria monocytogenes, Pseudomonas aeruginosa, Salmonella choleraesuis and Staphylococcus aureus. The effect of food ingredients and the pH on the antimicrobial efficacy of oil was assessed by monitoring the maximum growth rate of Listeria monocytogenes in model media. The model media included potato starch (0, 1, 5 or 10%), beef extract (1, 5, 3, 6 or 12%), sunflower oil (0, 5 or 10%) and TSB broth at pH levels of 4, 5, 6 or 7. The EOLa showed efficacy at all concentrations (50%, 25%, 6.25%, 3%, 1.5%, 0.8%, 0.4% and 0.2%) evaluated, against all bacterial species, Gram-positive and Gram-negative. The antimicrobial efficacy of EO was found to be a function of ingredient manipulation. Proteins and lipids had a negative impact on the oil effectiveness, indicating the protective action of both on the microbial specie tested. On the contrary, at the highest concentration of starch (10%), the lower rate growth of L. monocytogenes was detected, therefore indicating a positive effect of carbohydrates on the oil effectivenes. Regarding the pH, the studies showed that the rate of microbial growth increased with increasing pH. It was concluded that the use of EOLa is more effective control pathogenic and spoilage bacteria when applied to starchy foods under an acidic pH.

  5. Anticoccidial effects of coumestans from Eclipta alba for sustainable control of Eimeria tenella parasitosis in poultry production.

    Science.gov (United States)

    Michels, M G; Bertolini, L C T; Esteves, A F; Moreira, P; Franca, S C

    2011-04-19

    The aim of this study was to evaluate the anticoccidial efficacy of a product containing coumestans from Eclipta alba. Experimental conditions were set up as to reproduce the environment conditions for husbandry adopted in commercial broiler farms. Broilers were raised in broiler chicken shed provided with feeders, drinkers, illumination and temperature control systems and floor covering to afford an adequate nourishing environment. Male Cobb broilers (240) were assigned to four experimental groups being each experimental group set apart in rice straw-covered shed isolated with wire mesh. One-day-old broilers were reared in a coccidian-free environment with ad libitum supply of filtered water and freely available standard feed, from the 1st to the 35th day of life. The T1 group received standard feed (negative control); T2 was treated with standard feed supplemented with 66 ppm of salinomycin (positive control); groups T3 and T4 had standard feed supplemented with the ethyl acetate fraction from methanolic extract of E. alba aerial parts, which contains the coumestans WL and DWL (120 and 180 ppm, respectively). The chicken broilers were individually infected with 2 × 104 oocysts of Eimeria tenella when they were 14 days old and were monitored weekly to evaluate zootechnical parameters such as weight gain and food conversion ratio. Counting of coccidial oocyst in chicken feces was assessed from random samples, from the 21st to 28th days of life, which corresponded to 7-14 days after the infection. Five chickens selected at random from each experimental group were subsequently euthanized at 21, 28 or 35 days of life to determine the lesion score in the cecal region and to excise a cecum portion for histopathological evaluation. The group treated with coumestans from E. alba presented an average weight gain and food conversion ratio higher than the negative control group and similar to the mean value of the positive control group. Coumestan-treated groups showed a

  6. Microsatellite markers characterized in the barn owl (Tyto alba) and of high utility in other owls (Strigiformes: AVES).

    Science.gov (United States)

    Klein, Akos; Horsburgh, Gavin J; Küpper, Clemens; Major, Agnes; Lee, Patricia L M; Hoffmann, Gyula; Mátics, Róbert; Dawson, Deborah A

    2009-11-01

    We have identified 15 polymorphic microsatellite loci for the barn owl (Tyto alba), five from testing published owl loci and 10 from testing non-owl loci, including loci known to be of high utility in passerines and shorebirds. All 15 loci were sequenced in barn owl, and new primer sets were designed for eight loci. The 15 polymorphic loci displayed two to 26 alleles in 56-58 barn owls. When tested in 10 other owl species (n = 1-6 individuals), between four and nine loci were polymorphic per species. These loci are suitable for studies of population structure and parentage in owls.

  7. The SolemnAddress Uttered by Vasile Goldiş in Alba-Iulia on 1 December, 1918

    Directory of Open Access Journals (Sweden)

    Eugen GAGEA

    2011-01-01

    Full Text Available In the report he presented before the Great National Assembly of Alba-Iulia, Vasile Goldişunderlined some of the ideals for which humankind had fought and continued to fight in the postwarperiod: national freedom, social equality. The solemn address he uttered is an expression of hishumanism and confidence in human civilization, of the conviction that the organization of ademocratic state and the achievement of equality of rights for all citizens are and must be a “workof civilization”.

  8. Reducción de la germinación de jopo del girasol por efecto de restos de Sinapis alba en condiciones controladas

    OpenAIRE

    Pedraza, V; Gonzaléz Verdejo, C. I.; Perea, F.; Saavedra, M; Alcántara, C.

    2015-01-01

    Andalucía es la comunidad autónoma con mayor superficie de girasol en España. Sin embargo, la principal limitación en su rendimiento es la susceptibilidad a jopo. El objetivo de este trabajo ha sido determinar en condiciones controladas si los restos vegetales de la crucífera Sinapis alba podrían ser una medida de control del jopo del girasol. Se ha realizado un bioensayo con material vegetal cultivado en dos años diferentes, 2014 y 2015. Los resultados sugieren que S. alba podría ser utiliza...

  9. Doutorado sanduíche: considerações para uma experiência de sucesso no exterior Doctorado sándwich: consideraciones para una experiencia exitosa en el extranjero 'Sandwich PhD': considerations for a successful experience abroad

    Directory of Open Access Journals (Sweden)

    Marina de Goes Salvetti

    2013-03-01

    Full Text Available O estágio de doutorado no exterior, conhecido, no Brasil, como "Doutorado Sanduíche", é uma oportunidade de aprimorar as habilidades em pesquisa, destacar-se no meio acadêmico e estabelecer e/ou ampliar oportunidades de trabalho em contexto internacional. Neste artigo, descrevemos elementos-chave do processo de planejamento e desenvolvimento do Doutorado Sanduíche aprendidos por professores e alunos envolvidos na colaboração entre a Escola de Enfermagem da Universidade de São Paulo e a Lawrence S. Bloomberg Faculty of Nursing, Universidade de Toronto, Canadá, e apresentamos a participação em uma rede de doutorados, como alternativa ao Doutorado Sanduíche. A experiência internacional, quando bem planejada e desenvolvida, promove o desenvolvimento pessoal e profissional do aluno, favorece a internacionalização dos programas de pós-graduação e dos grupos de pesquisa brasileiros.Una estancia de doctorado internacional, "Doctorado Sándwich" como es conocido en Brasil, es una oportunidad de mejorar las habilidades de investigación, hacerse conocido académicamente y establecer y/o agrandar las oportunidades de trabajo en el contexto internacional. En este artículo, nosotros describimos factores importantes del proceso de la planificación y desarrollo del "Doctorado Sándwich" aprendidos por estudiantes y profesores involucrados en la colaboración entre la Escuela de Enfermería de la Universidad de São Paulo y la Facultad de Enfermería Lawrence S. Bloomberg, Universidad de Toronto, Canadá y presentamos la participación en una red de doctorados como una alternativa a la estancia doctoral internacional. La experiencia internacional, cuando bien planeada y desarrollada, promueve el desarrollo personal y profesional del estudiante y favorece la internacionalización de los programas de postgrado y de los grupos de investigación brasileños.International PhD internship, named "Sandwich PhD'" in Brazil, is an opportunity to

  10. Aportes curriculares para la educación en medios: un proceso en construcción Curricular Contribution to Media Education: a Work in Progress

    Directory of Open Access Journals (Sweden)

    Renato Opertti

    2009-03-01

    Full Text Available El análisis de la educación en medios desde una perspectiva educativa y curricular es el objeto de este trabajo que enfatiza el desarrollo de las competencias que requieren los alumnos para su participación activa en el mundo actual. Se analizan los procesos de desarrollo curricular que, integrados por componentes políticos y técnicos, reflejan el tipo de sociedad que aspiramos a construir. Asimismo, se presenta el concepto de educación inclusiva como una visión educativa que busca garantizar el derecho que tienen todos los niños, jóvenes y adultos a recibir una educación adaptada a sus expectativas, necesidades y formas de aprendizaje, asegurando la participación y la igualdad de oportunidades. Se introduce el concepto de un currículo «glo-local»; que se sustenta en el desarrollo de competencias en los estudiantes para posibilitar una retroalimentación entre las realidades globales y locales, vinculando las escuelas a las situaciones de la vida cotidiana. El trabajo concluye afirmando el carácter transversal que debiera tener una educación en medios en el currículo, lo cual requiere, entre otras cosas, de una formación docente de calidad, fluida comunicación entre los docentes y propuestas educativas sólidas e incluyentes sustentadas en procesos participativos de consenso. The autor addresses the analysis of media and information literacy from an education and curricular perspective emphasizing the development of competencies that students require in order to have an active participation in the current world. He analyses the processes of curriculum development that, made up by political and technical components, reflect the type of society we wish to construct. Likewise, he presents the concept of inclusive education as an educational vision that aims at guaranteeing the right of all children, young people and adults to receive an education accommodated to their expectations, needs and forms of learning, assuring

  11. Performance of ginger grass (Lippia alba for traits related to the production of essential oil Desempenho da erva-cidreira (Lippia alba para características relacionadas à produção de óleos essenciais

    Directory of Open Access Journals (Sweden)

    Paula Yuri Yamamoto

    2008-01-01

    Full Text Available Lippia alba (Verbenaceae is a shrub whose essential oil has important biological, pharmacological, and aromatizing properties. To reach the sustained cultivation of new species with economic potential, the present study aimed to evaluate L. alba performance for fresh leaf matter (FM, leaf dry matter (DM, virus symptoms (VS - Cucumber mosaic virus, CMV, oil yield (OY, and oil chemical composition (OC, and to evaluate DM stability and adaptability. Ten genotypes of four chemical groups (chemotypes were evaluated in six experiments designed as randomized blocks with two plants per plot, over the whole State of São Paulo, Brazil. A 2.0 x 0.4 x 1.6 m spacing was used in Monte Alegre do Sul and Pindorama, while a 1.0 x 0.4 x 0.6 m spacing was used in Campinas, where four experiments were established under different irrigation and fertilization conditions. The genotype effect was significant (p A Lippia alba (Verbenaceae é um arbusto produtor de óleo essencial com importantes atividades biológicas, farmacológicas e aromatizantes. Visando o cultivo sustentado de uma nova espécie com potencial econômico, os objetivos deste trabalho foram avaliar o desempenho da L. alba para massa de folha fresca (MF, massa de folha seca (MS, sintomas de vírus (SV - Cucumber mosaic virus, CMV, rendimento de óleo essencial (RE e composição química do óleo (CQ, e avaliar a estabilidade e adaptabilidade fenotípica para o caráter MS. Dez genótipos pertencentes a quatro grupos químicos foram testados em seis experimentos instalados no estado de São Paulo, Brasil, com delineamento em blocos ao acaso e duas plantas por parcela. Em Monte Alegre do Sul e Pindorama, foi utilizado espaçamento de 2,0 x 0,4 x 1,6 m e em Campinas, foram instalados quatro experimentos 1,0 x 0,4 x 0,6 m sob condições distintas de adubação e irrigação. O efeito de genótipo foi significativo para todas as características avaliadas, revelando elevada produtividade de folhas do IAC

  12. Antimicrobial activity of polyphenol-rich fractions from Sida alba L. (Malvaceae against co-trimoxazol-resistant bacteria strains

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    Konaté Kiessoun

    2012-02-01

    Full Text Available Abstract Background The increased resistance of microorganisms to the currently used antimicrobials has lead to the evaluation of other agents that might have antimicrobial activity. Medicinal plants are sources of phytochemicals which are able to initiate different biological activities including antimicrobials Materials and methods In vitro antibacterial (MIC, MBC and time-kill studies of polyphenol-rich fractions from Sida alba L. (Malvaceae was assessed using ten bacteria strains (Gram-negative and Gram-positive. Results All test bacteria were susceptible to the polyphenol-rich fractions. Time-kill results showed that after 5 h exposition there was no viable microorganism in the initial inoculum and the effect of polyphenol-rich fractions was faster on Enterococcus faecalis (Gram-positive bacterium comparatively to the other bacteria strains. Conclusion The data analysis indicates that the tested of polyphenol-rich fractions has significant effects when compared with the standard antibiotic. These results therefore justify the traditional use of sida alba L., alone or in combination with other herbs to treat bacterial infections.

  13. [Determination of 99 pesticide residues in Paeoniae Radix Alba by gas chromatography-triple quadrupole tandem mass spectrometry].

    Science.gov (United States)

    Liu, Xiaoqin; Tong, Ling; Meng, Wenting; Sun, Guoxiang

    2015-08-01

    A method was established for the simultaneous determination of 99 pesticide residues with combination of solid-phase extraction technique ( SPE) and gas chromatography-triple quadrupole tandem mass spectrometry (GC-QqQ-MS). The sample was extracted with ethyl acetate, and cleaned-up by an amino SPE column. The extract was determined by GC-MS/MS in multi-reaction monitoring (MRM) mode, and matrix-matched internal standard method was applied to quantify the pesticides. The results of all the 99 pesticides showed good linearity in the range of 0.001-0.25 mg/L, with correlation coefficients (r2) > 0.99. The limits of quantification (LOQs) were between 0.001-0.050 mg/kg. The recoveries were between 66.7% and 128.0% with RSD values typically lower than 18.3% at three spiked levels of 0.05, 0.10 and 0.20 mg/kg. This method has been applied to determine thirteen batches of commercially available samples, chlorpyriphos-ethyl and p,p'-DDE were detected in four batches of Paeoniae Radix Alba. The method is highly accurate, reliable and sensitive for monitoring the 99 pesticide residues in Paeoniae Radix Alba.

  14. Genetic diversity analyses of Lasiodiplodia theobromae on Morus alba and Agave sisalana based on RAPD and ISSR molecular markers

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    Hong-hui Xie

    2016-10-01

    Full Text Available Genetic diversity of 23 Lasiodiplodia theobromae isolates on Morus alba and 6 isolates on Agave sisalana in Guangxi province, China, was studied by using random amplified polymorphic DNA and inter-simple sequence repeat molecular markers. Results of two molecular markers showed that the average percentage of polymorphic loci of all isolates was more than 93%. Both dendrograms of two molecular markers showed obvious relationship between groups and the geographical locations where those strains were collected, among which, the 23 isolates on M. alba were divided into 4 populations and the 6 isolates on A. sisalana were separated as a independent population. The average genetic identity and genetic distance of 5 populations were 0.7215, 0.3284 and 0.7915, 0.2347, respectively, which indicated that the genetic identity was high and the genetic distance was short in the 5 populations. Average value of the gene diversity index (H and the Shannon’s information index (I of 29 isolates were significantly higher than 5 populations which showed that genetic diversity of those isolates was richer than the populations and the degree of genetic differentiation of the isolates was higher. The Gst and Nm of 29 isolates were 0.4411, 0.6335 and 0.4756, 0.5513, respectively, which showed that the genetic diversity was rich in those isolates.

  15. Archaeometric comparison between the Neolithic pottery of different cultures at the archaeological site of Alba Iulia (Transylvania, Romania

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    Bruno Fabbri

    2009-06-01

    Full Text Available A large quantity of pottery has been discovered at the Lumea Nouă Neolithic and Eneolithic settlement in Alba Iulia City (Romania. It belongs to different cultures, and in this paper a comparison among three of them is made: Vinča, Lumea Nouă and Foeni. An analogous number of samples has been selected for each of the three cultures, together with some clay samples collected in the Alba Iulia settlement area. The samples have been analysed by means of XRF, XRPD, and in thin section. Significant differences among the three cultures are only related to the alkalis contents. The Lumea Nouă pottery has higher potassium contents and contains microfossils, while the Foeni pottery differs to each other for the higher sodium contents. A clear correspondence between pottery and clays has not been found, so that we hypothesize that not all the pottery is local or, more probable, that a geological gradual variation in local clay deposits existed.

  16. Projected benefit-cost analysis of agri-silvicultural system: vegetable crops intercropping with Salix alba (Willow)

    Institute of Scientific and Technical Information of China (English)

    Aijaz Hussain Mir; M.A. Khan

    2008-01-01

    An experiment upon an agri-silvicultural system involving Willow (Salix alba) tree,Kale (Brassica oleracea var.acephala) and Knol khol (Brassica oleracea var.caularapa) was laid in randomized block designed at farmers' willow field at Shalimar near Sher-e-Kashmir University of Agricultural Sciences and Technology of Kashmir,Srinagar India during 2005 and 2006.The main plot was divided into sub-spots with 8 m ( 2 m in size each in which four two-year-old willow (Salix alba) trees were at a spacing of 2 m ( 2 m in a sub-spot.The intercrops were maintained at recommended spacing and supplied with recommended doses of fertilizers.The benefit-cost ratio in willow plantation intercropped with vegetable crops of Kale and Knol Khol was analyzed and compared with the benefit-cost ratio of sole willow tree forestry.The results showed that every rupee invested in plantation of agri-silvicultural system generates benefit-cost ratio of 2.78 and 2.79 in case of Willow intercropping with Kale and Willow with Knol khol,respectively,while as for sole crop of willows benefit-cost ratio was calculated to be 2.66.These results provided circumstantial evidence in favour of adopting agroforestry involving willow instead of Sole tree forestry.

  17. In vitro antifungal activity of four chemotypes of Lippia alba (Verbenaceae essential oils against Alternaria solani (Pleosporeaceae isolates

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    ELISA Z. TOMAZONI

    2016-06-01

    Full Text Available Several volatile natural compounds produced by plant secondary metabolism have been proven to present antimicrobial action, enabling their use in phytopathogen control. They also present low environmental impact when compared to conventional pesticides. Essential oils contain these compounds and can be found in several plant species, such as Lippia alba (Mill. N.E. Brown (Verbenaceae. Essential oils of four chemotypes of L. alba, characterized by their major compounds, namely camphor, citral, linalool and camphor/1,8-cineole, were tested against the phytopathogen Alternaria solani Sorauer (Pleosporaceae, which causes early blight on tomatoes and is responsible for great economic losses regarding production. Essential oils antifungal action was tested in vitro using potato dextrose agar medium with essential oil concentrations at 0.1, 0.5, 1.0, 1.5 and 2.0 µL mL-1. The chemotype that had the best performance was citral, showing significant inhibition compared to the others, starting at the 0.5 µL mL-1 concentration. The essential oil belonging to the linalool chemotype was efficient starting at the 1.5 µL mL-1 concentration. Conversely, the camphor chemotype did not show any action against the phytopathogen. Moreover, the essential oils had no remarkable effect on tomato germination and growth. In conclusion, these essential oils presented fungicidal action against A. solani.

  18. Effects of extracts from Hibiscus macranthus and Basella alba mixture on testosterone production in vitro in adult rat testes slices

    Institute of Scientific and Technical Information of China (English)

    Paul F. Moundipa; Silvère Ngouela; Pierre Kamtchouing; Etienne Tsamo; Félicité M. Tchouanguep; Serge Carreau

    2006-01-01

    Aim: To find an in vitro system for the measurement of the androgenic effects of different extracts of Hibiscus macranthus (Malvaceae) and Basella alba (Basellaceae). Methods: The production of testosterone from testes slices incubated in two media, either Krebs-Henseleit buffer containing 0.5 % Bovine serum albumin (BSA) or Dubecco's Modified Eagle's medium-F12 Ham nutrient mixture (DME/Ham F12), under a mixture of 5 % CO2 in 95 % air was determined either in the presence or absence of cofactors and Hibiscus macranthus plus Basella alba (HMBA)extracts. Results: The testosterone production was increased in testes slices incubated in DME/Ham F12 medium in response to the cofactors (49 %) and aqueous extracts (34 %-60 % according to dilutions). Under the same atmospheric conditions, there was no positive response of the testes slices to either cofactor or HMBA extract stimulation in Krebs-Henseleit buffer containing 0.5 % BSA. In further investigations related to the effect of HMBA, the DME/Ham F12 medium was used. The results obtained from the in vitro test showed that the activity was present mainly in methylene chloride and methanol, since these extracts induced an increase in testosterone production by testes slices. Conclusion: The testes slice system is suitable to be used for further in vitro investigations of the isolation of androgenic bioactive components of plants.

  19. Beneficial effect of Berberis buxifolia Lam, Ziziphus mistol Griseb and Prosopis alba extracts on oxidative stress induced by chloramphenicol.

    Science.gov (United States)

    Albrecht, Claudia; Pellarin, Gabriela; Rojas, María José; Albesa, Inés; Eraso, Alberto F

    2010-01-01

    The chemiluminescence of luminol, a measure of oxidative stress, increased immediately as a consequence of reactive oxygen species (ROS) stimulated by this antibiotic. The effect of Ch was dose dependent with maximum stimulus at 8 mg/ml (Vmax); above this concentration the cells began to reduce the production of ROS. The oxidative injury of Ch was counteracted by water extracts of Berberis buxifolia lam, Zizyphus mistol Griseb and Prosopis alba, indigenous fruits from Argentina. The relatively light units (RLU) emitted decreased immediately as a consequence of a protective effect exerted by the extracts of these fruit extracts on blood cells. The three indigenous fruit extracts reduced to a different extent the oxidative injury caused by Ch. B.buxifolia lam exhibited the highest antioxidant capacity followed by Z.mistol Griseb. Water extracts of both fruit extracts were the most effective against the oxidative stress, while P.alba presented better antioxidant capacity in the ethanolic fraction obtained. Hexane extracts showed low protective action on blood cells, with little reduction of area under curve (AUC) of RLU plotted versus time. Leukocytes remained viable in blood samples incubated for 3h with Ch and water extracts of B. buxifolia lam or Z. mistol Griseb (97.1% and 92.5% viability by Trypan blue exclusion, respectively); whereas with Ch only the cells were stressed and viability decreased to 30%. The three fruit extracts protected the viability of leukocytes in parallel with the decrease of ROS. Erythrocytes were not lysed in the presence of Ch.

  20. In vitro antifungal activity of four chemotypes of Lippia alba (Verbenaceae) essential oils against Alternaria solani (Pleosporeaceae) isolates.

    Science.gov (United States)

    Tomazoni, Elisa Z; Pansera, Márcia R; Pauletti, Gabriel F; Moura, Sidnei; Ribeiro, Rute T S; Schwambach, Joséli

    2016-05-31

    Several volatile natural compounds produced by plant secondary metabolism have been proven to present antimicrobial action, enabling their use in phytopathogen control. They also present low environmental impact when compared to conventional pesticides. Essential oils contain these compounds and can be found in several plant species, such as Lippia alba (Mill.) N.E. Brown (Verbenaceae). Essential oils of four chemotypes of L. alba, characterized by their major compounds, namely camphor, citral, linalool and camphor/1,8-cineole, were tested against the phytopathogen Alternaria solani Sorauer (Pleosporaceae), which causes early blight on tomatoes and is responsible for great economic losses regarding production. Essential oils antifungal action was tested in vitro using potato dextrose agar medium with essential oil concentrations at 0.1, 0.5, 1.0, 1.5 and 2.0 µL mL-1. The chemotype that had the best performance was citral, showing significant inhibition compared to the others, starting at the 0.5 µL mL-1 concentration. The essential oil belonging to the linalool chemotype was efficient starting at the 1.5 µL mL-1 concentration. Conversely, the camphor chemotype did not show any action against the phytopathogen. Moreover, the essential oils had no remarkable effect on tomato germination and growth. In conclusion, these essential oils presented fungicidal action against A. solani.

  1. Reduction of the anxiety of medical students after curricular reform Redução da ansiedade de estudantes de medicina após reforma curricular

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    Antonio Waldo Zuardi

    2008-06-01

    Full Text Available OBJECTIVES: Curricular structure may interfere in students' anxiety level at medical schools. The objective of this study was to assess anxiety levels in medical students before and after a curriculum reform at the Medical School of Ribeirão Preto and to compare them with students at other courses that had no curricular changes in the same university campus. METHOD: Study samples were obtained in two moments: 1 two years before the reform; 2 after the reform when the reformed curriculum completed its fourth year. The pre-sample (former curriculum consisted of 307 medical students and 217 students from psychology and biology courses. The post-sample (new curriculum was composed of 330 medical students and 194 students from psychology and biology courses. Anxiety was assessed by the State-Trait Anxiety Inventory (STAI. RESULTS: Comparing the pre with the post sample, we found STAI-T scores of the students under the former curriculum were significantly higher in the first (42.9 + 1.08 and second (41.9 + 1.1 years than the STAI-T scores of the medical students under the new curriculum (38.1 + 1.0 and 37.9 + 1.06, respectively. Students from other courses and 5th year medical students, who followed the same curriculum, did not show any significant differences between different samples. CONCLUSION: These results suggest that changes to medical school curricula may reduce the medical student' levels of anxiety in the first two years of the course.OBJETIVOS: Características da estrutura curricular podem interferir no nível de ansiedade dos alunos do curso médico. O objetivo deste estudo foi avaliar o nível de ansiedade nos alunos do curso médico, antes e depois de uma reforma no currículo da Faculdade de Medicina de Ribeirão Preto, comparando com outros cursos, do mesmo campus da universidade, que não tiveram mudanças curriculares. MÉTODO: As amostras do estudo foram obtidas em dois tempos distintos: 1 dois anos antes da reforma; 2 pós a

  2. Formação profissional ética: um compromisso a partir das diretrizes curriculares? Ethical professional education: a commitment based on the curricular guidelines?

    Directory of Open Access Journals (Sweden)

    Mirelle Finkler

    2010-11-01

    Full Text Available Esta reflexão problematiza o discurso e a prática que se estabelecem em torno do tema da formação ética dos profissionais da saúde e, mais particularmente, do cirurgião-dentista, situando o atual momento de implantação das Diretrizes Curriculares Nacionais no ensino superior brasileiro. Procura-se, desta forma, indicar alguns limites e possibilidades para uma formação ética condizente com o novo perfil profissional almejado.This reflection questions the discourse and practice surrounding the ethical education of health professionals and, more particularly, of dentists, situating the current state of deployment of the National Curriculum Guidelines in Brazilian Higher Education. The goal is to point to a few limits and possibilities for an ethical education in line with the new professional profile that is sought.

  3. La atención a la diversidad: del Modelo del Déficit al Modelo Curricular. Attention to Diversity: From the Deficit Model to the Curricular Model

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    Pilar Arnaiz Sánchez

    2007-12-01

    Full Text Available Este artículo presenta un estudio llevado a cabo en una escuela de Educación Primaria (3-12 años en la Región de Murcia (Sureste de España, con la finalidad de conocer las características de la respuesta educativa que se estaba desarrollando con los alumnos con necesidades educativas especiales escolarizados en ella. En el planteamiento teórico se revisa la trayectoria de la integración escolar en España y se expone la conveniencia de trabajar desde un modelo curricular. Los resultados del estudio, realizado desde los parámetros de la interpretación cualitativa, a través del modelo de Doyle (1979, 1986,1987, evidencian cuáles son las estructuras organizativas y las tareas que más favorecen la participación e integración de los alumnos con necesidades educativas especiales en las aulas regulares. This article presents a research study developed in a Primary School (3 to 12 years in the county of Murcia (South east of Spain. The study?s aim was to establish the educational response carried out with learners with special education needs in the school. The theoretical framework reviews the course of school integration in Spain and establishes the need to work from a curricular model. The results of this study, which follows the qualitative analysis model by Doyle (1979, 1986, 1987, show the organization structures and tasks that promote participation and integration of students with special education needs in mainstream classrooms.

  4. Propostas pedagógicas ou curriculares: subsídios para uma leitura crítica Curricular or pedagogical proposals: support for a critical analysis

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    Sonia Kramer

    1997-12-01

    Full Text Available Este trabalho, de natureza teóricoprática, visa apresentar uma alternativa de análise e construção de currículo. Foi produzido a partir de atividades de assessoria, acompanhamento e avaliação de políticas públicas de educação de diferentes órgãos públicos, especialmente municipais, e está baseado em pesquisas na área, tendo o objetivo de subsidiar a análise crítica de propostas pedagógicas ou curriculares. O texto é orientado pela teoria crítica da cultura e a autora parte do pressuposto de que toda proposta pedagógica é expressão de um projeto político e cultural. Destina-se em particular a profissionais que atuam nas redes de ensino regular. A análise aqui desenvolvida tenta sistematizar as principais questões que precisam ser respondidas na elaboração de projetos curriculares.This text has a theoretical and practical approach - it intends to present an alternative to curriculum analyses and curriculum construction. It is based on the activities of educational consultancy as well as on educational policies, evaluation practice managed by different public institutions, and on educational research, with the purpose of aiding pedagogical proposals or curricula projects. The text is guided by a critical theory of culture and the author assumes that every pedagogical project expresses a political and cultural project. It is aimed at, in particular, professionals who work or study in public education. The analysis developed here attempted to systemize the principal questions that have to be answered in order to elaborate curricula projects.

  5. Políticas curriculares descentralizadas: autonomia ou recentralização? Decentralized curricular policies: autonomy or re-centralization?

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    José Augusto Pacheco

    2000-12-01

    Full Text Available No período da reforma das décadas de 1980 e 1990, a idéia das políticas curriculares descentralizadas tornou-se central no discurso educacional. O Estado poderá usar o discurso da descentralização para defender mais autonomia e responsabilidade, tal como as forças de mercado poderão empregá-lo para orientar os seus objetivos em relação às escolas. Neste artigo pretendemos identificar uma série de diferentes significados para a palavra descentralização, argumentando que o currículo é um processo intencional e prático em que os principais atores são os professores e os alunos. O ponto central é como caminharmos fora das linhas. A provável resposta introduz a centralidade da escola sem minimizar a importância das questões curriculares.The idea of decentralization became central to educational discourse during the period of reform of the late 1980s and the 1990s. The State can use the discourse of decentralization to argue in favor of greater autonomy and responsibility, just as market forces can use it to attain their objectives in regard to schools. In this article our purpose is to identify a number of different meanings of the term decentralization, arguing that decisions regarding curricula are intentional and practical processes in which students and teachers are the main actors. The key question is how to move ahead off the beaten path. The probable answer will be based on the centrality of the school without minimizing the importance of curriculum-related issues.

  6. Guia curricular de saúde para o ensino de 1.º grau Curricular guide of health for the first grade school

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    Hebe da Silva Coelho

    1974-03-01

    Full Text Available Apresenta-se o "Guia Curricular de Saúde para o Ensino do 1.° Grau" aprovado oficialmente pela Secretaria de Educação do Estado de São Paulo para ser utilizado nas Escolas de 1.° grau. Após salientar os pontos fundamentais que foram levados em conta na sua elaboração - capacidade de aprendizado do escolar; situação do ensino formalizado de Saúde dentro do conjunto que se relaciona com a Saúde do Escolar; visão bio-psico-social de Saúde - foram destacados os objetivos gerais do guia e englobados o conteúdo de ensino em quatro temas básicos: Crescimento e Desenvolvimento; Nutrição; Higiene Física, Mental e Social; Agravos à Saúde. O conteúdo de cada tema básico é, depois, distribuido por série escolar e, finalmente, detalhados os objetivos específicos para cada série.There were presented the "Curricular Guide of Health for the First Grade School" which were oficially approved by Educational Department of S. Paulo State, Brazil, and which is to used for the First Grade School. There were emphasized the fundamental points which were used in the elaboration of the guide such as - the capacity of learning of the scholar; the situation of Education in Health in the context related to the Scholar Health; the bio-psycho-social view of Health - there were pointed out the general objectives which cover the education contents in four bascial items: Knowledge and development; Nutrition; Physical, Mental and Social Hygiene; Health damage. The content of each basical item is distributed for each year of the first grade school in order to cover specific objectives for each year.

  7. Investigation of the Chemical Changes from Crude and Processed Paeoniae Radix Alba-Atractylodis Macrocephalae Rhizoma Herbal Pair Extracts by Using Q Exactive High-Performance Benchtop Quadrupole-Orbitrap LC-MS/MS

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    Gang Cao

    2014-01-01

    Full Text Available The Paeoniae Radix Alba-Atractylodis Macrocephalae Rhizoma herbal pair is mainly used for regulating the functions of liver and spleen, benefiting qi, and nourishing blood. However, the bioactive compounds for the pharmacological activities of the crude and processed Paeoniae Radix Alba-Atractylodis Macrocephalae Rhizoma herbal pair extracts are still unclear to date. In the present study, Q Exactive high-performance benchtop quadrupole-Orbitrap LC-MS/MS was applied to identify the complicated components from crude and processed Paeoniae Radix Alba, crude and processed Atractylodis Macrocephalae Rhizoma, and their crude and processed herbal pair extracts. 123 and 101 compounds were identified in crude and processed Paeoniae Radix Alba samples, respectively. Meanwhile, 32 and 26 compounds were identified in crude and processed Atractylodis Macrocephalae Rhizoma samples, respectively. In the crude and processed Paeoniae Radix Alba-Atractylodis Macrocephalae Rhizoma herbal pair extracts, co-decoction could significantly change the chemical composition of Paeoniae Radix Alba and Atractylodis Macrocephalae Rhizoma in solution. The developed method may provide a scientific foundation for deeply elucidating the processing and compatibility mechanism of Paeoniae Radix Alba and Atractylodis Macrocephalae Rhizoma.

  8. La formación de maestros en educación en Chiapas : significados, orientaciones y prácticas /

    OpenAIRE

    Chávez Moguel, Rosario Guadalupe

    2012-01-01

     tesis que para obtener el grado de Doctorado en Pedagogía, presenta Rosario Guadalupe Chavez Moguel ; asesor Alicia de Alba Ceballos262 páginas : ilustracionesDoctorado en Pedagogía UNAM, Facultad de Estudios Superiores Aragón, 2012

  9. The 2″-O-glucosylation of vitexin and isovitexin in petals of Silene alba is catalysed by two different enzymes

    NARCIS (Netherlands)

    Heinsbroek, R.; Brederode, J. van; Nigtevecht, G. van; Maas, J.; Kamsteeg, J.; Besson, E.; Chopin, J.

    1980-01-01

    Two separate genes, Fg and Vg, which govern the presence of isovitexin 2″-O-glucoside and vitexin 2″-O-glucoside respectively in the petals of Silene alba control different glucosyltransferases. In Vg/Vg,fg/fg plants no isovitexin 2″-O-glucosyltransferase was present and in vg/vg,Fg/Fg plants no vit

  10. Introduction of beet cyst nematode resistance from Sinapsis alba L. and Raphanus sativus L. into Brassica napus L. (oil-seed rape) through sexual and somatic hybridization.

    NARCIS (Netherlands)

    Lelivelt, C.L.C.

    1993-01-01

    Experiments were performed to select for beet cyst nematode (Heterodera schachtii Schm., abbrev. BCN) resistant genotypes of Brassica napus L. (oilseed rape), and to introduce BCN-resistance from the related species Raphanus sativus L. (oil-radish) and Sinapis alba L. (white mustard) into oil-seed r

  11. Evaluation of the Influence of Sulfur-Fumigated Paeoniae Radix Alba on the Quality of Si Wu Tang by Chromatographic and Chemometric Analysis.

    Science.gov (United States)

    Pei, Ke; Cai, Hao; Duan, Yu; Qiao, Feng-Xian; Tu, Si-Cong; Liu, Xiao; Wang, Xiao-Li; Song, Xiao-Qing; Fan, Kai-Lei; Cai, Bao-Chang

    2016-01-01

    An accurate and reliable method of high-performance liquid chromatographic fingerprint combining with multi-ingredient determination was developed and validated to evaluate the influence of sulfur-fumigated Paeoniae Radix Alba on the quality and chemical constituents of Si Wu Tang. Multivariate data analysis including hierarchical cluster analysis and principal component analysis, which integrated with high-performance liquid chromatographic fingerprint and multi-ingredient determination, was employed to evaluate Si Wu Tang in a more objective and scientific way. Interestingly, in this paper, a total of 37 and 36 peaks were marked as common peaks in ten batches of Si Wu Tang containing sun-dried Paeoniae Radix Alba and ten batches of Si Wu Tang containing sulfur-fumigated Paeoniae Radix Alba, respectively, which indicated the changed fingerprint profile of Si Wu Tang when containing sulfur-fumigated herb. Furthermore, the results of simultaneous determination for multiple ingredients showed that the contents of albiflorin and paeoniflorin decreased significantly (P < 0.01) and the contents of gallic acid and Z-ligustilide decreased to some extent at the same time when Si Wu Tang contained sulfur-fumigated Paeoniae Radix Alba. Therefore, sulfur-fumigation processing may have great influence on the quality of Chinese herbal prescription.

  12. A B rief Analysis of Miu Xi-yong's Using Radix Paeoniae Alba to Pacify Liver%缪希雍白芍平肝法浅析

    Institute of Scientific and Technical Information of China (English)

    李晓寅; 陆海峰; 俞欣玮

    2014-01-01

    明代医家缪希雍善用白芍,其白芍平肝法更是独具特色,该方法被广泛运用并贯穿其整个医学理论体系,对后世关于白芍的应用研究产生了极大影响。本文通过其临证用药组进行分析,探讨了其白芍平肝法的具体运用。%Ming dynasty Medical scientist Miu Xi -yong was skillful in using radix paeoniae alba ,and his theory of using radix paeoniae alba to pacify liver was distinctive.Radix paeoniae alba's efficacy of pacifying liver had been widely used and run through his complete medical theory system .It had an enormous impact for later generations .By means of analyzing his art of constructing prescriptions ,this article discussed Miu Xi-yong using radix paeoniae alba to pacify liver .

  13. A biochemical approach to assessment of effects of organic pollution on the metabolism of the non-opportunistic polychaete, Glycera alba

    Science.gov (United States)

    Blackstock, J.

    1980-03-01

    Loch Creran and Loch Eil, sea lochs in the west of Scotland, both receive discharges of particulate organic effluent from industrial installations. Glycera alba (Müller) is widely distributed in the sediments of both lochs, and assays of activities of enzymes associated with energy-yielding metabolism have been done on crude extracts of specimens collected from variously affected areas. Mean phosphofructokinase activities were low in extracts of G. alba collected some 400 m from the source of effluent from a seaweed processing factory, increased to a maximum at 900 m and declined slightly at 1150 m where the sediment is little affected by the effluent. Pyruvate kinase activities exhibited qualitatively similar changes of lesser magnitude and no differences in a-glycerophosphate or malate dehydrogenase activities were observed. In G. alba from Loch Eil a relationship was established between phosphofructokinase activity and Eh at 4 cm in the sediment and the maximum change in phosphofructokinase was found at low Eh, below -50 mV. The data are interpreted with reference to results from biological and environmental monitoring in Lochs Eil and Creran. It is suggested that the low phosphofructokinase activities in G. alba from the most affected areas of each loch may constitute a consistent biochemical response to effects of the organic inputs.

  14. Prey type and foraging ecology of sanderlings Calidris alba in different climate zones : Are tropical areas more favourable than temperate sites?

    NARCIS (Netherlands)

    Grond, Kirsten; Ntiamoa-Baidu, Yaa; Piersma, Theunis; Reneerkens, Jeroen

    2015-01-01

    Sanderlings (Calidris alba) are long-distance migratory shorebirds with a non-breeding range that spans temperate and tropical coastal habitats. Breeding in the High Arctic combined with non-breeding seasons in the tropics necessitate long migrations, which are energetically demanding. On an annual

  15. Atividade Anti-inflamatória e Avaliação da Toxicidade do Extrato Hidroetanólico de Morus alba (Moraceae

    Directory of Open Access Journals (Sweden)

    Camila Bugnotto Pereira

    2013-01-01

    Full Text Available No presente trabalho, avaliou-se a atividade antiinflamatória do extrato hidroetanólico das folhas de Morus alba, através do modelo de indução de tecido granulomatoso e analisaram-se os efeitos toxicológicos sobre o fígado pela dosagem de AST e ALT e sobre o rim, pela dosagem de creatinina. O extrato hidroetanólico das folhas de M. alba foi administrado oralmente, três vezes ao dia, durante 6 dias. A nimesulida (5 mg/kg/dia foi utilizada como controle positivo e o propilenoglicol 20% como controle negativo. Após o tratamento, foi avaliada a formação do granuloma e realizada a dosagem de AST, ALT e creatinina em todos os grupos. Os animais tratados com o extrato de M. alba apresentaram inibição do processo inflamatório de 20,24 ± 6,94%, enquanto que os tratados com controle positivo apresentaram 21,42 ± 6,52%. O extrato hidroetanólico de M. alba demonstrou atividade antiinflamatória semelhante à nimesulida com ausência de indícios de hepatotoxicidade e nefrotoxicidade.

  16. Conservation status of white poplar (Populus alba L. and black poplar (Populus nigra L. in the territory of Great War Island

    Directory of Open Access Journals (Sweden)

    Šijačić-Nikolić Mirjana

    2014-01-01

    Full Text Available T he paper describes t he conservation status of white poplar (Populus alba L. and black poplar (Populus nigra L. in the territory of Great War Island. The activities of in situ and ex situ gene pool conservation have been defined in order to preserve and expand the populations of the above species, as carriers of complex wetland forest ecosystems.

  17. Yield reduction in Brassica napus, B. rapa, B. juncea, and Sinapis alba caused by flea beetle (Phyllotreta cruciferae (Goeze) (Coleoptera: Chrysomelidae)) infestation in northern Idaho.

    Science.gov (United States)

    Brown, Jack; McCaffrey, Joseph P; Brown, Donna A; Harmon, Bradley L; Davis, James B

    2004-10-01

    Phyllotreta cruciferae is an important insect pest of spring-planted Brassica crops, especially during the seedling stage. To determine the effect of early season P. cruciferae infestation on seed yield, 10 genotypes from each of two canola species (Brassica napus L. and Brassica rapa L.) and two mustard species (Brassica juncea L. and Sinapis alba L.) were grown in 2 yr under three different P. cruciferae treatments: (1) no insecticide control; (2) foliar applications of endosulfan; and (3) carbofuran with seed at planting plus foliar application of carbaryl. Averaged over 10 genotypes, B. rapa showed most visible P. cruciferae injury and showed greatest yield reduction without insecticide application. Mustard species (S. alba and B. juncea) showed least visible injury and higher yield without insecticide compared with canola species (B. napus and B. rapa). Indeed, average seed yield of S. alba without insecticide was higher than either B. napus or B. rapa with most effective P. cruciferae control. Significant variation occurred within each species. A number of lines from B. napus, B. juncea, anid S. alba showed less feeding injury and yield reduction as a result of P. cruciferae infestation compared with other lines from the same species examined, thus having potential genetic background for developing resistant cultivars.

  18. Effects of Artemisia herba-alba essential oils on survival stored cereal pests: Tribolium castaneum (Herbst (Coleoptera, Tenebrionidae and Trogoderma granarium (Everst (Coleoptera, Dermestidae

    Directory of Open Access Journals (Sweden)

    Ben Slimane Badreddine

    2016-05-01

    Full Text Available Objective: To assess the chemical components and toxicity of Artemisia herba-alba (A. herbaalba essential oil against two major stored cereal pests, Tribolium castaneum (T. castaneum and Trogoderma granarium (T. granarium. Methods: Two bioassay actions were tasted: repellent and fumigant actions against adult and larvae, respectively, to assess the effect of A. herba-alba essential oil. Results: Gas chromatography-mass spectrometer analyses of the essential oil contained β-thujone (12.50%, α-thujone (8.78%, sabinyl acetate (8.56%, terpinene-4-ol (8.51%, α-terpineol (3.35%, 1,8-cineol (5.45%, γ-terpene (4.82%, camphor (4.52%, dimethylethylbenzene (3.93% and α-terpinene (3.35% as the major components. Fumigant toxicity tests showed that A. herba-alba oil was more toxic than T. granarium (LC50 = 2.09 mg/mL, LC90 = 4.12 mg/mL and T. castaneum (LC50 = 6.39 mg/mL, LC90 = 10.10 mg/mL. Conclusions: This study has highlighted a bioinsecticide activity of A. herba-alba against two insect pests of stored foodstuffs (T. castaneum and T. granarium. The Artemisia essential oil offers an interesting potential insecticide that could be studied more deeply to isolate and identify the active substances, to study their physiological impact on other insects

  19. Fingerprint analysis, multi-component quantitation, and antioxidant activity for the quality evaluation of Salvia miltiorrhiza var. alba by high-performance liquid chromatography and chemometrics.

    Science.gov (United States)

    Zhang, Danlu; Duan, Xiaoju; Deng, Shuhong; Nie, Lei; Zang, Hengchang

    2015-10-01

    Salvia miltiorrhiza Bge. var. alba C.Y. Wu and H.W. Li has wide prospects in clinical practice. A useful comprehensive method was developed for the quality evaluation of S. miltiorrhiza var. alba by three quantitative parameters: high-performance liquid chromatography fingerprint, ten-component contents, and antioxidant activity. The established method was validated for linearity, precision, repeatability, stability, and recovery. Principal components analysis and hierarchical clustering analysis were both used to evaluate the quality of the samples from different origins. The results showed that there were category discrepancies in quality of S. miltiorrhiza var. alba samples according to the three quantitative parameters. Multivariate linear regression was adopted to explore the relationship between components and antioxidant activity. Three constituents, namely, danshensu, rosmarinic acid, and salvianolic acid B, significantly correlated with antioxidant activity, and were successfully elucidated by the optimized multivariate linear regression model. The combined use of high-performance liquid chromatography fingerprint analysis, simultaneous multicomponent quantitative analysis, and antioxidant activity for the quality evaluation of S. miltiorrhiza var. alba is a reliable, comprehensive, and promising approach, which might provide a valuable reference for other herbal products in general to improve their quality control.

  20. PCN - CONHECIMENTOS DE QUÍMICA, UM OLHAR SOBRE AS ORIENTAÇÕES CURRICULARES OFICIAIS.

    Directory of Open Access Journals (Sweden)

    Albino Oliveira Nunes

    2008-03-01

    Full Text Available Os Parâmetros Curriculares Nacionais para o Ensino Médio foram elaborados para guiar a prática docente rumo a uma reforma educacional pretendida para o modelo brasileiro em consonância com a Lei de Diretrizes e Bases da Educação Brasileira (LDB, 1996. Esse documento foi elaborado por especialistas das diversas áreas a pedido do Ministério da Educação, processo distinto do desejado que seria a construção em processo democrático onde os professores tivessem a possibilidade de produzir um documento que orientaria a direção de suas práticas pedagógicas, onde o docente se sentiria como co-participante do processo. Além disso, há que se levar em consideração a adequação deste documento quanto ao objetivo de orientar a (reconstrução curricular. Notadamente na secção PCN – Conhecimentos de Química, este documento apresenta insuficiências significativas para o seu propósito, tais como: superficialidade, discurso autoritário, etc. Contudo, o PCN – Ciências da Natureza, Matemática e suas Tecnologias, pode ser visto como um marco, uma vez que fomenta o debate sobre a reestruturação curricular do ensino de ciências e matemática em nosso país.

  1. Learning Online Environment for an Extra Curricular Course in Clinical Biochemistry

    OpenAIRE

    J.M. Martins; W.B. Maia; B.C. Araujo; S.B. Barreto; I.J. Aquino; L.G.C. Silva; A.L.A. Paiva; E.P.A. Lopes; M.G.F.M. Gomes; A.L.F. Porto

    2009-01-01

    Integration between digital technology and telecommunication resources present multiple possibilities regarding access to education, among them, the longdistance learning process. The purpose of this work is to offer a long distance extra  curricular course for health care students and professionals, intending to contribute with their continued education. The online cou rse (180h) was avail able on the webpage  www.ead.ufpe.biz in a LMS  platform(Learning Management System), in which 35 stude...

  2. Curricular Transformation of Education in the Field of Physical and Sport Education in Slovakia

    Directory of Open Access Journals (Sweden)

    Elena Bendíková

    2016-12-01

    Full Text Available The study presents basic information on the curricular transformation of physical and sport education in Slovakia after the year 1989, which is related to the education process in the 21st century. What is more, it points to the basis for modern transformation in relation to sports as well as to insufficient undergraduate teacher training and its consequences for the performance of newly qualified teachers. These findings are partially included in the grant VEGA no. 1/0376/14 Physical Activity Intervention for the Prevention of Health of the Population of Slovakia.

  3. Transversalidade de conteúdos nas diretrizes curriculares: o gênero no ensino da enfermagem

    OpenAIRE

    Ferreira, Sílvia Lúcia; Nascimento, Enilda Rosendo do

    2004-01-01

    Este artigo apresenta uma reflexão sobre o conceito de gênero no ensino de Enfermagem da UFBA, tomando como base as Diretrizes Curriculares Nacionais do Curso de Graduação em Enfermagem. Apresenta-se, a partir da experiência em um currículo disciplinar, a possibilidade de inseri-lo como um conteúdo transversal, em um currículo integrado. A discussão desta proposta pretende contribuir com outras instituições de ensino que, no momento, passam pelo processo de mudança de currículo. O artigo apon...

  4. Diseño curricular de inglés para 5º curso de EGB

    OpenAIRE

    Cerezal Sierra, Fernando

    1987-01-01

    Se ha realizado un proyecto de diseño curricular con estudiantes de 3er curso de Inglés de la Escuela de Magisterio de Guadalajara para dos cursos de 5º de EGB. A través de un trabajo en equipo, se han analizado la edad e intereses concretos de esos niños, se definieron unos objetivos flexibles previos, los contenidos y la metodología a seguir. La actividad de Magisterio, y al profesor-coordinador y los tutores de ambos curso, rectificando lo planificado previamente.

  5. Reforma curricular: el nuevo reto del asesor académico

    Directory of Open Access Journals (Sweden)

    Germán Arango Forero

    2003-01-01

    Full Text Available La inminente reforma curricular que será implementada en la Facultad de Comunicación Social y Periodismo de la Universidad de La Sabana obliga a replantear mucho más que un plan de estudios. La nueva manera de formar a un comunicador, implica igualmente un reto especial a todo el cuerpo docente, que cumple, además, una función muy especial desde la Asesoría Académica Personalizada.

  6. Las adaptaciones curriculares de pequeno porte o no significativas en el contexto brasileño

    OpenAIRE

    Heredero, Eladio Sebastián

    2007-01-01

    La presente comunicación pretende conceptualizar qué se entiende por adaptaciones curriculares de pequeño porte dentro de la legislación brasileña, organizar todas las respuestas que a diferentes niveles pueden darse dentro de la escuela inclusiva que en estos momentos vivimos y además aportar ideas y estrategias concretas para organizar esta medida de atención a la diversidad de la manera más eficaz posible. A partir de la reflexión sobre el trabajo en el aula y de la experiencia vivida ...

  7. El papel de los materiales curriculares en la intervención educativa

    OpenAIRE

    2001-01-01

    En el presente artículo, el autor nos destaca el papel tan fundamental que juegan los materiales curriculares en el proceso educativo, aunque durante décadas un uso inadecuado de los mismos generó no pocos rechazos entre los partidarios de una nueva escuela que mejorara el proceso de enseñanza y aprendizaje de las nuevas generaciones. Por ello, en un primer momento, plantea la necesidad de diseñar materiales innovadores adecuados a las exigencias actuales de la sociedad y del nuevo sistema ed...

  8. Interactions 1 as an ELT coursebook: a curricular and theory-based scrutiny

    OpenAIRE

    Henry Sevilla Morales; Roy Gamboa Mena

    2015-01-01

    El presente artículo analiza la pertinencia del libro Interactions 1 como texto utilizado en el curso IO-5400 Comunicación Oral I, perteneciente al primer año de la carrera de Bachillerato en la Enseñanza del inglés en una universidad pública en Costa Rica. En este sentido, se estudia la metodología propuesta en el texto, su diseño (imágenes, estrategias didácticas para el desarrollo de habilidades orales y auditivas, recursos que acompañan el texto, entre otros) y su enfoque curricular, a fi...

  9. METODOLOGIA PARA ELABORAÇÃO DE MATRIZ CURRICULAR: INTEGRAÇÃO E TRANSVERSALIDADE

    OpenAIRE

    2016-01-01

    En el mundo del trabajo, el entrenamiento profesional hay sido un desafío constante a cada vez más implicando avances técnico-científicos, especialmente de los sistemas de información y comunicación. Este artículo presenta resultados de una investigación realizada con la aplicación de una metodología de elaboración de Matriz Curricular de Referencia. Tuve como objeto de estudio 53 Cursos de Educación Profesional Técnica de Nivel Medio del sistema Escuela Técnica Abierta de Brasil. El objetivo...

  10. Innovación curricular en precálculo con calculadoras gráficas

    OpenAIRE

    Gómez, Pedro; Mesa, Vilma María; Carulla, Cristina; Valero, Paola; Gómez, Cristina

    1998-01-01

    La utilización de las calculadoras gráficas en la enseñanza y el aprendizaje del precálculo puede mirarse, no solamente desde el punto de vista de sus efectos en aspectos particulares del currículo, sino también desde la perspectiva de la complejidad y la dinámica del sistema curricular en el que se introduce, de tal manera que sea posible explorar la forma como sus elementos se relacionan y evolucionan en el tiempo. Con base en esta perspectiva, se estudiaron los efectos de la introducción d...

  11. Historia de la Administración de Justicia: materiales curriculares electrónicos

    OpenAIRE

    Martínez Almira, María Magdalena

    2011-01-01

    El estudio de las fuentes e instituciones de la Historia de la Administración de Justicia a través de materiales curriculares electrónicos permite al alumno adquirir un conocimiento de la asignatura adaptado a nuevos espacios de socialización, nuevas habilidades y competencias técnicas, nuevas formas de educación y de aprendizaje. Los contenidos de la asignatura, relativos a las instituciones y fuentes de la Administración de Justicia en España a lo largo de la Historia, se han organizado sis...

  12. ¿Nueva forma de programar? Concreción curricular tras la LOMCE

    OpenAIRE

    Javier Rodríguez Torres; Purificación Cruz Cruz

    2015-01-01

    El presente artículo tiene como objetivo principal revisar los cam- bios producidos en los documentos programáticos de los centros educati- vos, es decir, grandes o pequeñas modificaciones en los distintos niveles de concreción curricular tras la sucesión de "reformas de reformas" legis- lativas. Por otra parte, apoyar al profesorado que planifica su actividad para cumplir con lo estipulado por la autoridad competente, contextuali- zarlo en el entorno, para alejarse del intuicionismo y del ac...

  13. Problemas conceptuales del curriculum. Hacia la implementación de la transversalidad curricular

    OpenAIRE

    Adda Torres Chirinos; Eulalio Fernández Sánchez

    2015-01-01

    Esta investigación tuvo como objetivo analizar las diferentes concepciones del curriculum y los problemas para su implementación, desde la integralidad, a nivel universitario. Se parte de una metodología documental-descriptiva con un diseño de investigación bibliográfico. Los resultados arrojados dan cuenta de la incongruencia que ha existido en cuanto a los distintos intentos por llevar a cabo diversas acepciones curriculares a lo largo de los años. Se concluye que mediante la puesta en marc...

  14. Participación de los y las docentes en la transformación curricular

    Directory of Open Access Journals (Sweden)

    Rojas Madrigal, Carolina

    2012-02-01

    Full Text Available Resumen: Este ensayo fue elaborado a partir del enlace de dos momentos: el primero, relacionado con la experiencia de la autora como docente universitaria, y como integrante y coordinadora de la Comisión de Currículum, de la Escuela de Trabajo Social, de la Universidad de Costa Rica. El segundo, propiciado por la reflexión sobre estas prácticas en un grupo de estudio sobre diseño curricular en el Centro de Evaluación Académica de la misma Universidad. Tener el espacio para conjugar experiencia y reflexión permitió retomar labores esenciales que las y los docentes pueden realizar para transformar el currículum, si se parte de una comprensión compleja, histórica y contextual de este. Se concluye, en este sentido, que el diseño y desarrollo curricular son dos momentos inseparables, donde el cuerpo docente puede tener una participación activa y crítica. El análisis realizado, fuertemente imbricado al referente de la propia práctica, se concreta en una propuesta de acciones posibles, cuya viabilidad aumenta si el profesorado cuenta con la formación necesaria, y con una actitud permanente de autocrítica y reflexión.Abstract: This essay was elaborated by the combination of two different moments; the first one related with the experience of the author in his labor as a university educator, and as a integrant and coordinator of the Curriculum Commission of the Social Work School at the University of Costa Rica. The second, based on this practices, propitiated by the reflections emanated from a group of study on curricular design, in the Center of Academic Evaluation of this University. Given this space for combine experience with reflection, permitted to retake essential labors that the docents can do to transform the curriculum, if it parts of a complex contextual and historic understanding of it. It’s concludes that in this sense, the curricular development and design, are two inseparable moments on who the docents can have an

  15. Effects ofArtemisia herba-alba essential oils on survival stored cereal pests:Tribolium castaneum (Herbst) (Coleoptera, Tenebrionidae) and Trogoderma granarium (Everst) (Coleoptera, Dermestidae)

    Institute of Scientific and Technical Information of China (English)

    Ben Slimane Badreddine; Mariem Baouindi

    2016-01-01

    Objective:To assess the chemical components and toxicity ofArtemisia herba-alba (A. herba-alba) essential oil against two major stored cereal pests,Tribolium castaneum (T. castaneum) andTrogoderma granarium(T. granarium). Methods:Two bioassay actions were tasted: repellent and fumigant actions against adult and larvae, respectively, to assess the effect ofA. herba-alba essential oil. Results: Gas chromatography-mass spectrometer analyses of the essential oil containedβ-thujone (12.50%),α-thujone (8.78%), sabinyl acetate (8.56%), terpinene-4-ol (8.51%),α-terpineol (3.35%), 1,8-cineol (5.45%),γ-terpene (4.82%), camphor (4.52%), dimethyl-ethylbenzene (3.93%) andα-terpinene (3.35%) as the major components. Fumigant toxicity tests showed thatA. herba-alba oil was more toxic thanT. granarium (LC50 = 2.09 mg/mL, LC90 = 4.12 mg/mL) andT. castaneum (LC50 = 6.39 mg/mL, LC90 = 10.10 mg/mL). Conclusions: This study has highlighted a bioinsecticide activity ofA. herba-alba against two insect pests of stored foodstuffs (T. castaneum andT. granarium). TheArtemisia essential oil offers an interesting potential insecticide that could be studied more deeply to isolate and identify the active substances, to study their physiological impact on other insects.

  16. Linkage mapping in tetraploid willows: segregation of molecular markers and estimation of linkage phases support an allotetraploid structure for Salix alba x Salix fragilis interspecific hybrids.

    Science.gov (United States)

    Barcaccia, G; Meneghetti, S; Albertini, E; Triest, L; Lucchin, M

    2003-02-01

    Salix alba-Salix fragilis complex includes closely related dioecious polyploid species, which are obligate outcrossers. Natural populations of these willows and their hybrids are represented by a mixture of highly heterozygous genotypes sharing a common gene pool. Since nothing is known about their genomic constitution, tetraploidy (2n=4x=76) in willow species makes basic and applied genetic studies difficult. We have used a two-way pseudotestcross strategy and single-dose markers (SDMs) to construct the first linkage maps for both pistillate and staminate willows. A total of 242 amplified fragment length polymorphisms (AFLPs) and 50 selective amplifications of microsatellite polymorphic loci (SAMPL) markers, which showed 1:1 segregation in the F(1) mapping populations, were used in linkage analysis. In S. alba, 73 maternal and 48 paternal SDMs were mapped to 19 and 16 linkage groups covering 708 and 339 cM, respectively. In S. fragilis, 13 maternal and 33 paternal SDMs were mapped in six and 14 linkage groups covering 98 and 321 cM, respectively. For most cosegregation groups, a comparable number of markers linked in coupling and repulsion was identified. This finding suggests that most of chromosomes pair preferentially as occurs in allotetraploid species exhibiting disomic inheritance. The detection of 10 pairs of marker alleles from single parents showing codominant inheritance strengthens this hypothesis. The fact that, of the 1122 marker loci identified in the two male and female parents, the vast majority (77.5%) were polymorphic and as few as 22.5% were shared between parental species highlight that S. alba and S. fragilis genotypes are differentiated. The highly difference between S. alba- and S. fragilis-specific markers found in both parental combinations (on average, 65.3 vs 34.7%, respectively) supports the (phylogenetic) hypothesis that S. fragilis is derived from S. alba-like progenitors.

  17. Inhibition of Mevalonate Pathway and Synthesis of the Storage Lipids in Human Liver-Derived and Non-liver Cell Lines by Lippia alba Essential Oils.

    Science.gov (United States)

    Montero-Villegas, Sandra; Polo, Mónica; Galle, Marianela; Rodenak-Kladniew, Boris; Castro, María; Ves-Losada, Ana; Crespo, Rosana; García de Bravo, Margarita

    2017-01-01

    The essential oils (EOs) of Lippia alba, an herb extensively used as a folk medicine in Latin America, are today promoted as an effective means of eliminating problems caused by hyperlipemia. We hypothesized that L.alba EOs inhibited cholesterol and triacylglycerols synthesis and decreased the intracellular depots of those lipids (lipid droplets), mechanisms involving the induction of a hypolipidemic response. Our aim was, therefore, to evaluate the hypolipogenic capability of the EOs of four L. alba chemotypes on liver-derived (HepG2) and non-liver (A549) human cell lines and to identify the potential biochemical targets of those chemotypes, particularly within the mevalonate pathway (MP). [(14)C]Acetate was used as radioactive precursor for assays. Lipid analyses were performed by thin-layer and capillary gas chromatography, lipid droplets analyzed by fluorescence microscopy, and HMGCR levels determined by Western blot. In both cell lines, all four chemotypes exerted hypocholesterogenic effects within a concentration range of 3.2-32 µg/mL. Nonsaponifiable lipids manifested a decrease in incorporation of [(14)C]acetate into squalene, lanosterol, lathosterol, and cholesterol, but not into ubiquinone, thus suggesting an inhibition of enzymes in the MP downstream from farnesyl pyrophosphate. The tagetenone chemotype, the most efficacious hypocholesterogenic L. alba EO, lowered HMGCR protein levels; inhibited triacylglycerols, cholesteryl esters, and phospholipids synthesis; and diminished lipid droplets in size and volume. These results revealed that L. alba EOs inhibited different lipogenic pathways and such lipid-lowering effects could prove essential to prevent cardiovascular diseases.

  18. The anesthetic efficacy of eugenol and the essential oils of Lippia alba and Aloysia triphylla in post-larvae and sub-adults of Litopenaeus vannamei (Crustacea, Penaeidae).

    Science.gov (United States)

    Parodi, Thaylise V; Cunha, Mauro A; Heldwein, Clarissa G; de Souza, Diego M; Martins, Átila Clivea; Garcia, Luciano de O; Wasielesky, Wilson; Monserrat, José María; Schmidt, Denise; Caron, Braulio O; Heinzmann, Berta; Baldisserotto, Bernardo

    2012-04-01

    The aim of this study was to evaluate the anesthesia induction and recovery times of sub-adult and post-larvae white shrimp (Litopenaeus vannamei) that were treated with eugenol and the essential oils (EOs) from Lippia alba and Aloysia triphylla. Oxidative stress parameters in the hemolymph of this species were also analyzed. The concentrations of eugenol, A. triphylla EO and L. alba EO recommended for anesthesia were 200, 300 and 750 μL L(-1) for sub-adults and 175, 300 and 500 μL L(-1) for post-larvae, respectively. The concentrations studied during the transport of sub-adults were between 20 and 50 μL L(-1) eugenol, 20-30 μL L(-1)A. triphylla EO and 50 μL L(-1)L. alba EO. For post-larvae, the optimal concentrations for transport were 20 μL L(-1) eugenol and between 20 and 50 μL L(-1)A. triphylla EO. The white shrimp sub-adults that were exposed to A. triphylla EO (20 μL L(-1)) showed increases in their total antioxidant capacities (150%), catalase (70%) and glutathione-S-transferase (615%) activity after 6 h. L. alba EO (50 μL L(-1)) and eugenol (20 μL L(-1)) also increased GST activity (1292 and 1315%) after 6 h, and eugenol (20 μL L(-1)) decreased the total antioxidant capacity (100%). Moreover, concentrations above 30 μL L(-1) for the EOs of A. triphylla and L. alba and 20 μL L(-1) eugenol were effective at inducing anesthesia and improving the antioxidant system against reactive oxygen species (ROS) after 6 h.

  19. The Implementation of a Course Design Using Online Curricular Tools for Assurance of Learning at a Small Private AACSB School of Business

    Science.gov (United States)

    Fratto, Victoria A.

    2010-01-01

    This study was designed to determine if the use of online curricular tools as a pedagogical supplement to an introductory accounting course would improve student accounting knowledge as compared to traditional teaching methodology. The curricular model employed course-embedded online assessments and tools that were designed to assist an accounting…

  20. Diseño curricular: de la integración a la complejidad / Curriculum design: from integration to complexity

    OpenAIRE

    Badilla Saxe Eleonora

    2011-01-01

    Resumen:En este ensayo se muestra un tránsito que podría seguir el diseño curricular desde la integración hacia la complejidad. Se parte de las ideas de James Beane y John Deswey sobre la Integración Curricular y las Actividades Ocupacionales respectivamente para pasar por los llamados Ejes Transversales y el Enfoque por Proyectos, con miras a evolucionar hacia la Pedagogía de la Complejidad, tomando como base las ideas para promover el pensamiento complejo que propone Edgar Morin. Como concl...

  1. ESTRATEGIA CURRICULAR PARA LA FORMACIÓN DE LA COMPETENCIA DE EMPRENDIMIENTO EN NEGOCIO EN REDES UNIVERSITARIAS

    OpenAIRE

    Sención Raquel Yvelice Zorob Avila

    2012-01-01

    En este artículo se analiza la educación tradicional, la que ostenta una metodología para formar emprendedores en cursos de objetivos específicos en contradicción a la formación por competencias, la que se regula en el aprendizaje por proyecto, desde un modelo sistémico - estructural con un enfoque complejo en el proceso curricular de la carrera, que se instrumenta en la estrategia curricular de la competencia a través de redes sociales y plataformas virtuales que permiten potenciar la vincul...

  2. Estrategia curricular para la formación de la competencia de emprendimiento en negocio en redes universitarias

    OpenAIRE

    Sención, Raquel; Zorob Avila, Yvelice

    2012-01-01

    En este artículo se analiza la educación tradicional, la que ostenta una metodología para formar emprendedores en cursos de objetivos específicos en contradicción a la formación por competencias, la que se regula en el aprendizaje por proyecto, desde un modelo sistémico - estructural con un enfoque complejo en el proceso curricular de la carrera, que se instrumenta en la estrategia curricular de la competencia a través de redes sociales y plataformas virtuales que permiten potenciar la vincul...

  3. Fundamentamentos filosóficos y psicológicos de la planificación curricular

    OpenAIRE

    Sequeira Rodríguez, Alicia

    2009-01-01

    Al hablar de planificación curricular debemos aceptar la naturaleza interdisciplinaria del currículo. De hecho, no hay que argumentar demasiado para darse cuenta que el currículo educativo incorpora una serie de componentes que hace que su teoría y su práctica sean tareas multidisciplinarias e interdisciplinarias.El presente trabajo tiene como propósito fundamental clarificar en qué consiste los fundamentos filosóficos y psicológicos que sirven de base a al planificación curricular. La planif...

  4. Effects of a curricular revision on learner outcomes in veterinary clinical pathology.

    Science.gov (United States)

    Hollinger, Charlotte; Libarkin, Julie C; Stickle, Julia E; Hauptman, Joe G; Henry, Rebecca; Scott, Michael A

    2013-01-01

    A mixed-methods evaluation was conducted to study learner attitudes and knowledge about clinical pathology across a curricular change that instituted a stand-alone clinical pathology course in place of content within a previously integrated pathology course structure. Groups of pre- and post-change students were assessed three times across the two semesters leading up to graduation. At each time, rank-ordered and open-ended response items probed attitudes, and multiple-choice items assessed knowledge. Data about student clinical pathology performance were also collected from clinical pathology instructors and supervising clinicians. Student rank-ordered items were evaluated by factor analysis; resulting factor-scale scores, multiple-choice scores, and rank responses from study cohorts were statistically assessed between groups and within each group over time. Intraclass correlations were calculated for the coding of student open-ended responses, and all coded responses were compared among groups. Analysis revealed that students in the revised curriculum had greater satisfaction with their training and greater confidence in data interpretation compared to students without exposure to an independent clinical pathology course. Although differences in knowledge of clinical pathology were not detected, it was also apparent that the independent clinical pathology course filled a student-perceived curricular need without raising criticisms related to diminished integration with anatomic pathology. Secondary study outcomes included formative feedback for course improvement, evidence of clerkship efficacy, and baseline data for further studies.

  5. Formação docente: reflexões sobre o estágio curricular

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    Jeâni Kelle Landre Rosa

    2012-01-01

    Full Text Available O presente artigo apresenta reflexões e discussões sobre a importância e o papel do estágio curricular na formação prática de alunos do curso de licenciatura em Ciências Biológicas. A partir da análise do estágio curricular dos acadêmicos do 7º e 9º período, foram identificados os aspectos favoráveis e desfavoráveis e formuladas sugestões que visam melhorar a qualidade do mesmo. A pesquisa acerca da realidade e dos problemas do estágio supervisionado foi realizada por meio de análise documental (diário de campo e narrativas e questionários. Com auxílio da literatura especializada, conseguimos aprofundar a compreensão dos mecanismos de articulação entre teoria e prática no cotidiano escolar, o que poderá contribuir para a construção de um currículo mais coerente com a realidade da sala de aula da Educação Básica.

  6. The narrative of nursing students in their Supervised Curricular Internship portfolios

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    Nádia Frazão Rossi

    2014-09-01

    Full Text Available The critical-reflective training of nurses is a challenge. The reflective portfolio is an instrument used for developing this capacity. The aim of this qualitative study was to identify the types of narratives present in such portfolios and analyze the reflections of students enrolled in the Supervised Curricular Internship. Eleven portfolios were analyzed, and the narratives found were descriptive, reflective and descriptive, reflective and dialogic, and critical with subsequent thematic analysis. We identified four types of narratives. Reflections were focused around three thematic categories: an analysis of the internship’s field of work; assimilation and analysis of the nursing professional’s work; and what was learned throughout the Supervised Curricular Internship. The relevant aspects of the internship experience were apprehended and systematized through the portfolios, although more in-depth critical reflection is needed. The analysis of narrative types presented by students can contribute to guiding the process of nursing training evaluation towards critical reflection. doi: 10.5216/ree.v16i3.25691.

  7. Um novo olhar sobre o sentido de política nos estudos curriculares

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    Débora Raquel Alves Barreiros

    2010-12-01

    Full Text Available A new look at the meaning of policy in curricular studies...AbstractThis study discusses the meaning of policy based on a conception of curriculum and policy as enunciation, articulation/production of meanings. Underscoring the discursive nature as constituting curricular production supports the affirmation that the discourse is not a representation/manifestation of structures that are its basis, but an articulatory process. For that reason, in that study the concept of policy and the conceptions that support its formulations rooted in that understanding are presented, highlighting the contribution of Laclau and Mouffe, after examining central categories – discourse, hegemony and articulatory practices – which, for those authors, outline the perspective of policy defended. In that sense, the process of policy production is seen as an articulatory practice and it is argued that the analyses of curriculum policies are viewed as a conRoteiro,Joaçaba, v. 35, n. 2, p. 231-250, jul./dez. 2010 247Um novo olhar sobre o sentido de política...tingent, conflicting, discursive and dialogical action that enables the subjects to take up positions within the identitary discourses, in a democratic-pluralist universe complete with struggles and negotiations.

  8. Innovaciones curriculares en la formación universitaria de trabajadores sociales

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    Susana Aurelia Preciado Jiménez

    2004-08-01

    Full Text Available En este artículo se presentan y analisan los dados de los avances de las innovaciones curriculares incluidas en la reestructuración del currículo de la Facultad de Trabajo Social de la Universidad de Colima. Un aspecto importante que se busca en la formación de trabajadores sociales es que éstos sean vistos como actores sociales que participan en la resolución de las necesidades de la sociedad. Para ello, el cuerpo académico de la facultad se ha dado a la tarea de analizar el proceso y los resultados de la implementación del modelo de enseñanza centrado en el aprendizaje en la Facultad de Trabajo Social que se puso en marcha en la generación 2001-2005, para sustentar la reestructuración del plan de estudios. Los resultados apuntan la pertinencia de las nuevas modalidades pedagogicas e algunas consideraciones para sustentación de las innovaciones curriculares implementadas.

  9. Adaptation of The Early Childhood Curricular Beliefs Inventory into Turkish: Validity and Reliability Study

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    Sema SOYDAN

    2013-04-01

    Full Text Available The aim of this study is to adapt The Early Childhood Curricular Beliefs Inventory (ECCBI questionnaire into Turkish. The ECCBI is a tool designed for exploring curricular beliefs of pre-service teachers in the area of early childhood education. A subscale named “behavioural approach” is not in the Turkish adaptation of the scale according to expert opinions, three subtests meaning 54 items out of 72 items have been included in the adapted version of scale. After the equivalence test of Turkish form, instrument has been applied to 30 preschool teachers and 200 preservice preschool teachers and total 230 person. In order to test construct validity of Turkish instrument, confirmatory and exploratory factor analysis have been applied; to identify reliability, Cronbach Alpha reliability coefficient, Sperman-Brown formula and Guttmann split-half reliability formula have been employed and corrected item-total correlation has been examined. Results show that this scale is a suitable assessment tool for the pre-service teachers to determine their related beliefs about early childhood approaches.

  10. Creating sustainable curricular change: lessons learned from an alternative therapies educational initiative.

    Science.gov (United States)

    Sierpina, Victor; Bulik, Robert; Baldwin, Constance; Frenkel, Moshe; Gerik, Susie; Walters, Diedra; Frye, Ann

    2007-04-01

    The authors describe the process by which a curriculum was developed to introduce complementary and alternative medicine topics at multiple levels from health professional students to faculty, as part of a five-year project, funded by a grant from the National Institutes of Health, at the University of Texas Medical Branch in Galveston, Texas, from 2001 to 2005. The curriculum was based on four educational goals that embrace effective communication with patients, application of sound evidence, creation of patient-centered therapeutic relationships, and development of positive perspectives on wellness. The authors analyze the complex and challenging process of gaining acceptance for the curriculum and implementing it in the context of existing courses and programs. The developmental background and context of this curricular innovation at this institution is described, with reference to parallel activities at other academic health centers participating in the Consortium of Academic Health Centers for Integrative Medicine. The authors hold that successful curricular change in medical schools must follow sound educational development principles. A well-planned process of integration is particularly important when introducing a pioneering curriculum into an academic health center. The process at this institution followed six key principles for successful accomplishment of curriculum change: leadership, cooperative climate, participation by organization members, politics, human resource development, and evaluation. The authors provide details about six analogous elements used to design and sustain the curriculum: collaboration, communication, demonstration, evaluation, evolution, and dissemination.

  11. La profesionalización del recurso humano policial. Aspectos curriculares que se deben contemplar

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    María Gabriela Arce Navarro

    2008-01-01

    Full Text Available Este artículo desarrolla una propuesta de organización curricular que garantice el alcance de los objetivos, metas y funciones encomendadas a la Escuela Nacional de Policía, entidad a la que le ha sido conferida la potestad para formar y capacitar a las personas encargadas de velar por la seguridad ciudadana de nuestro país. La propuesta considera elementos aún no establecidos por este centro educativo, aportando avances curriculares significativos para la futura implementación del currículo. Por otro lado, describe los componentes que caracterizan el actual currículo de la Escuela, develando aspectos relevantes sobre la formación y capacitación policial, así como la apertura de esta Institución a los enfoques por competencias laborales, campo en el que incursionó con la implementación del actual Curso Básico Policial por Competencias Laborales.

  12. Sobre a constituição da disciplina curricular de língua portuguesa

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    Émerson de Pietri

    2010-01-01

    Full Text Available Este artículo tiene como objetivo considerar más detalladamente un momento del proceso histórico de constitución de la disciplina curricular Lengua Portuguesa en Brasil. En la década de 1970, fue alterada la organización de la escolarización básica e instancias oficiales responsables por la enseñanza publicaron documentos que subsidiaban, teórica y metodológicamente, los cambios curriculares propuestos. Fundamentada en la perspectiva discursiva, los documentos producidos en el período, fueron analizados y revelaron importantes características con respecto a los modos de apropiación., con objetivos pedagógicos, del saber académico sobre lenguaje. El análisis también posibilitó la muestra de la complejidad de ese momento histórico, caracterizado por la diversidad de aspectos académicos, políticos y didácticos en concurrencia.

  13. Effectiveness of a developmental curricular design to graduate culturally competent health practitioners.

    Science.gov (United States)

    Boggis, Debra

    2012-01-01

    With the goal to facilitate cultural competency development of students enrolled in graduate-level health professional education, this study examined the effectiveness of a curricular program guided by the Intercultural Developmental Continuum (IDC) as measured by the Intercultural Developmental Inventory (IDI). The IDI was administered to 17 occupational therapy (OT) students and a control group of 25 non-OT health professional students upon matriculation into their respective programs of graduate study and again upon completion of 3 years of study. OT students participated in a cultural curricular design guided by the IDC, while the control group participated in cultural study not guided by the IDC. Though OT students did not show a significant change in overall developmental orientation mean scores from pre-test to post-test (t = 0.847, p = 0.41), the results indicate that the designed intercultural curriculum increased intercultural competence among those OT students who began their program with the monocultural mindset of polarization (an "us vs. them" evaluative viewpoint) and moved to the interculturally transitional mindset of minimization (recognizing cultural commonalities and elimination of the "us vs. them" mindset). The control group showed a significant decrease in developmental orientation mean scores at post-test (t = 6.1, p competency of OT students, appears to have mitigated a decrease in competence. Results suggest that the cultural challenges that students face appear to be considerable and, without targeted, integrated intercultural preparation, can overwhelm new health professionals' intercultural capability.

  14. Diálogo curricular en torno a los procesos de formación

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    Reynaldo Mora Mora

    2015-10-01

    Full Text Available El presente artículo analiza el reconocimiento del diálogo en los procesos de formación entre lo glocal y lo global como un diálogo de intervención y la pertinencia como principio de formación, de profesionalización e institucionalización. Se propone que el currículo escolar debe ser un currículo que emerja de las posibilidades de cada contexto que debe ser apoyado por las perspectivas teóricas y metodológicas cualitativas en la construcción de propuestas curriculares alternativas dentro de la investigación educativa general, lo que debe lograr un impacto  en un sistema educativo.AbstractThis article discusses the recognition of dialogue in the education processes between the glocal and global as an intervention dialogue and relevance as the beginning of training, professionalization and institutionalization. It is proposed that the school curriculum should be a curriculum that emerges from the possibilities of each context that must be supported by qualitative theoretical and methodological perspectives in the construction of alternative curricular proposals in educational research in general, we should achieve significant impact in a educational system.

  15. Justificación curricular de la asignatura Arquitectura de tierra. Caso: Tamaulipas, México

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    Dora Luisa Roux Oropeza

    2016-08-01

    Full Text Available La globalización y los organismos internacionales hanrevolucionado el funcionamiento de las instituciones de educación superior. Las exigencias actualesimplican, entre otras,la gestión deestudios curriculares bajo paradigmas emergentes que justifiquen programas y planes encaminados a la solución de las problemáticas sociales globales. Tomando como referencia lo anterior, se presentan los resultados del análisis curricular que fundamentó la inclusión de la asignatura Arquitectura de Tierra, en la Facultad de Arquitectura Diseño y Urbanismo en Tamaulipas, México. AbstractGlobalization and international agencies have revolutionized the functioning of institutions of higher education; the requirements to them, involving among others, managing curriculum studies on emerging paradigms that justify programs and planswith responsibility for solving global social problems. With reference to the above, the results of the curriculum analysis that informed the inclusion of the subject Earthen Architecture in the Faculty of Architecture and Urban Design in Tamaulipas, Mexico.

  16. Políticas curriculares, Estado e regulação

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    Álvaro Moreira Hypolito

    2010-12-01

    Full Text Available O texto analisa as políticas curriculares desenvolvidas no contexto da globalização e do neoliberalismo que têm orientado as ações do Estado no campo educacional, como forma de regulacão social. Essas políticas produzem efeitos importantes para o campo educacional, com ênfase no currículo, na gestão e no trabalho docente. Por meio de estratégias de avaliação, tipicamente gerencialistas, o Estado tem obtido êxito na padronização curricular, na implantação de políticas de formação docente e na submissão da escola e da educação aos interesses do mercado. Os modos de gestão, insistentemente mostrados como a solução para a educação, chegam às escolas como formas estranhas de administração e a cada dia mais se mostram ineficientes para enfrentar os problemas escolares. Contudo, essas políticas de regulação continuam sendo a tônica das políticas de Estado para a educação.

  17. JUNDIÁ: EFEITOS FISIOLÓGICOS DO ÓLEO ESSENCIAL DE Lippia alba ADICIONADO À RAÇÃO

    OpenAIRE

    Carine de Freitas Souza

    2014-01-01

    O objetivo deste estudo foi analisar o efeito do óleo essencial de Lippia alba (EOLA) adicionado à ração de Rhamdia quelen (jundiá) em parâmetros metabólicos, osmorregulatórios e endócrinos. Os peixes foram alimentados por 20 dias com diferentes concentrações de OELA (0,00; 0,25 e 0,50 mL kg-1 ração). Os peixes foram alimentados durante 20 dias com diferentes concentrações de OELA (0,0 - controle, 0,25 e 0,50 mL kg-1 de ração). Parâmetros metabólicos, Na+, Cl-, K+ e cortisol no plasmas não fo...

  18. Draft genome sequence of Mameliella alba strain UMTAT08 isolated from clonal culture of toxic dinoflagellate Alexandrium tamiyavanichii

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    Muhd Danish-Daniel

    2016-12-01

    Full Text Available Mameliella alba strain UMTAT08 was isolated from clonal culture of paralytic shellfish toxin producing dinoflagellate, Alexandrium tamiyavanichii. Genome of the strain UMTAT08 was sequenced in order to gain insights into the dinoflagellate-bacteria interactions. The draft genome sequence of strain UMTAT08 contains 5.84Mbp with an estimated G + C content of 65%, 5717 open reading frames, 5 rRNAs and 49 tRNAs. It contains genes related to nutrients uptake, quorum sensing and environmental tolerance related genes. Gene clusters for the biosynthesis of type 1 polyketide synthase, bacteriocin, microcin, terpene and ectoine were also identified. This is suggesting that the bacterium possesses diverse adaptation strategy to survive within the dinoflagellate phycosphere. The draft genome sequence and annotation have been deposited at DDBJ/EMBL/GenBank under the accession number JSUQ00000000.

  19. El diario de viaje de José María Gutiérrez de Alba

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    Martha Jeanet Sierra Díaz

    2015-05-01

    Full Text Available Entre las recientes adquisiciones de la Biblioteca Luis Ángel Arango se destaca el diario manuscrito Impresiones de un viaje a América (1870-1884 de José María Gutiérrez de Alba, que constituye la obra de viajes por Colombia más extensa y rica en ilustraciones conocida hasta la fecha y la cual estará a disposición de los investigadores para su consulta en la Sala de Libros Raros y Manuscritos de la Biblioteca. Asimismo, dado que ya se realizó su digitalización, próximamente se podrá consultar en línea.

  20. Accumulation of Rutin and Betulinic Acid and Expression of Phenylpropanoid and Triterpenoid Biosynthetic Genes in Mulberry (Morus alba L.).

    Science.gov (United States)

    Zhao, Shicheng; Park, Chang Ha; Li, Xiaohua; Kim, Yeon Bok; Yang, Jingli; Sung, Gyoo Byung; Park, Nam Il; Kim, Soonok; Park, Sang Un

    2015-09-30

    Mulberry (Morus alba L.) is used in traditional Chinese medicine and is the sole food source of the silkworm. Here, 21 cDNAs encoding phenylpropanoid biosynthetic genes and 21 cDNAs encoding triterpene biosynthetic genes were isolated from mulberry. The expression levels of genes involved in these biosynthetic pathways and the accumulation of rutin, betulin, and betulinic acid, important secondary metabolites, were investigated in different plant organs. Most phenylpropanoid and triterpene biosynthetic genes were highly expressed in leaves and/or fruit, and most genes were downregulated during fruit ripening. The accumulation of rutin was more than fivefold higher in leaves than in other organs, and higher levels of betulin and betulinic acid were found in roots and leaves than in fruit. By comparing the contents of these compounds with gene expression levels, we speculate that MaUGT78D1 and MaLUS play important regulatory roles in the rutin and betulin biosynthetic pathways.

  1. Production of the Phanerochaete flavido-alba laccase in Aspergillus niger for synthetic dyes decolorization and biotransformation.

    Science.gov (United States)

    Benghazi, Lamiae; Record, Eric; Suárez, Antonio; Gomez-Vidal, José A; Martínez, José; de la Rubia, Teresa

    2014-01-01

    We investigated the expression of Phanerochaete flavido-alba laccase gene in Aspergillus niger and the physical and biochemical properties of the recombinant enzyme (rLac-LPFA) in order to test it for synthetic dye biotransformation. A. niger was able to produce high levels of active recombinant enzyme (30 mgL(-1)), whose identity was further confirmed by immunodetection using Western blot analysis and N-terminal sequencing. Interestingly, rLac-LPFA exhibited an improved stability at pH (2-9) and organic solvents tested. Furthermore, the percentage of decoloration and biotransformation of synthetic textile dyes, Remazol Brilliant Blue R (RBBR) and Acid Red 299 (NY1), was higher than for the native enzyme. Its high production, simple purification, high activity, stability and ability to transform textile dyes make rLac-LPFA a good candidate for industrial applications.

  2. Dissipation kinetics of alpha-cypermethrin and lambda-cyhalothrin residues in aboveground part of white mustard (Sinapis alba L.).

    Science.gov (United States)

    Słowik-Borowiec, Magdalena

    2016-09-01

    Dissipation of simultaneously applied insecticides alpha-cypermethrin and lambda-cyhalothrin was studied in a minor crop, aboveground part of white mustard (Sinapis alba L.). A validated gas chromatographic method (GC-ECD/NPD) was used to determine insecticide residues. Analytical performances were very satisfactory, with expanded uncertainties not higher than 14% (coverage factor k = 2, confidence level 95%). Dissipation of alpha-cypermethrin and lambda-cyhalothrin in white mustard followed first-order kinetics (R(2) between 0.953 and 0.995), with half-lives of 3.1-4.6 and 2.9-3.7 days respectively. Based on the results of this two-year study and the relevant residue regulation, alpha-cypermethrin and lambda-cyhalothrin treatments can be considered safe for crop protection, feeding animals and the environment.

  3. The essential oil of Lippia alba: analysis of samples from French overseas departments and review of previous works.

    Science.gov (United States)

    Hennebelle, Thierry; Sahpaz, Sevser; Dermont, Charles; Joseph, Henry; Bailleul, François

    2006-10-01

    This paper contains new data on the chemical composition of the essential oil of Lippia alba (Mill.) N. E. Brown, as well as an overview of the available literature. Although the composition of the essential oil of this species is well-documented, discrepancies between the reported results suggest that many chemotypes and morphotypes exist. The analysis of essential oils obtained from the leaves of samples from three different locations in the French Overseas Departments (French Guiana, Martinique, and two different places in Guadeloupe) have shown that the composition of each one is quite different. This new data, along with a review and discussion of published studies, enabled us to establish seven distinct chemotypes. Possible connections between these chemotypes and morphotypes already described were also investigated.

  4. Physical and chemical data collected from bottle casts in the Pacific Ocean and the Southern Oceans from ALBA and other platforms from 18 November 1962 to 04 May 1990 (NODC Accession 0000413)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Physical and chemical data were collected using bottle casts in the Pacific Ocean and the Southern Oceans from ALBA, LIRA, TAMGA and other platforms from 18 November...

  5. Biological synthesis and characterization of silver nanoparticles using Eclipta alba leaf extract and evaluation of its cytotoxic and antimicrobial potential

    Indian Academy of Sciences (India)

    Paramasivam Premasudha; Mudili Venkataramana; Marriappan Abirami; Periyasamy Vanathi; Kadirvelu Krishna; Ramasamy Rajendran

    2015-08-01

    With increasing global competitions there is a growing need to develop environmentally benevolent nanoparticles without the use of toxic chemicals. The biosynthesis of silver nanoparticles (AgNPs) using plant extracts became one of the potential areas of research. The bioreduction of metal ion is quite rapid, readily perform at room temperature and easily scale up. The present study describes a rapid and eco-friendly synthesis of AgNPs using Eclipta alba plant extract in a single pot process. The efficiency and the influence of various process variables in the biosynthesis of AgNPs analysed include redundant concentration, temperature and time. AgNPs were rapidly synthesized using aqueous leaf extract of E. alba and was observed when the medium turned to brown colour with the addition of silver ion. Biosynthesized AgNPs were characterized by the help of UV–visible spectroscopy for their stability and physicochemical parameters were studied by dynamic light scattering, Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy. The obtained results confirmed that recorded UV spectra show the characteristic surface plasmon resonance band for AgNPs in the range of 400–440 nm and physiochemical structural analysis shown that obtained AgNPs were crystalline in nature. Further, cytotoxic and antimicrobial activities of biosynthesized AgNPs against RAW 254.7, MCF-7 and Caco-2 cells as well as Gram positive and Gram negative bacteria were assessed. In-vitro cytotoxicity activity of characterized AgNPs against tested cell lines showed significant anti-cell-proliferation effect in nanomolar concentrations. The antibacterial activity of synthesized AgNPs showed effective inhibitory activity against human pathogens, including, Escherichia coli, Staphylococcus aureus and Pseudomonas aeruginosa. Thus, the significant outcome of this study would help to formulate value added herbal-based nano-materials in biomedical and nanotechnology industries.

  6. A new high-performance liquid chromatographic method for the determination and distribution of linalool in Michelia alba.

    Science.gov (United States)

    Xia, En-Qin; Song, Yang; Ai, Xu-Xia; Guo, Ya-Jun; Xu, Xiang-Rong; Li, Hua-Bin

    2010-07-12

    A new high-performance liquid chromatographic method with photodiode array detection was established for the determination of linalool in the plant Michelia alba. Linalool was extracted from the plant sample with the aid of ultrasound, and was analyzed on a Waters RP C(18) column (4.6 x 150 mm, 5 microm) using an acetonitrile and water (55:45, v/v) mobile phase at a flow rate of 1.0 mL/min. The column temperature was set at 25 degrees C, and the detection wavelength was 210 nm. The linear range of the method was 5-200 microg/mL with a correlation coefficient of 0.9975. The recovery was 92-112%, and the relative standard deviation was 1.85% (n = 9). The present method has been used to study the distribution of linalool in the plant Michelia alba. The plant samples include flowers, leaves and tender twigs. Furthermore, leaves included samples in their tender, grown-up and fallen phases, and flowers included samples in their juvenile, middle and whitening phases. The concentrations of linalool in different parts of the plant were 0.21-0.65%, 1.63-4.89% and 0.43% for leaves, flowers and tender twigs, respectively. The results showed that all the plant materials contained relative high concentration of linalool, and juvenile phase flowers contained the highest concentration of linalool. Notably, the fallen leaves also contained high concentrations of linalool, which could be a potential resource of this compound. The results obtained are very helpful for the potential full utilization of this plant.

  7. Mammal prey of the Barn Owl (Tyto alba in Parque Luro Reserve, La Pampa, Argentina

    Directory of Open Access Journals (Sweden)

    Sergio Tiranti

    1994-05-01

    Full Text Available Abstract The diet of the barn owl was studied through the analysis of pellets obtained in various sites within the Parque Luro reserve, located in an area of xerophyte Caldén forests. The study of 1241 prey items revealed a high dominance of the cricetid rodents Calomys sp., Akodon molinae and Eligmodontia typus, followed by other 8 species of rodents, one species of marsupial and undetermined birds and anuran amphibians. For comparing the diets from a relatively undisturbed forested area (Parque Luro and a deforested site, two subcollections of pellets were analyzed. Differences in FNB values and in the prevalence and composition of prey assemblages were observed between these areas. Riassunto Mammiferi predati dal Barbagianni (Tyto alba nella Riserva Parque Luro, La Pampa, Argentina - La dieta del Barbagianni (Tyto alba è stata studiata attraverso l'analisi delle borre ottenute in varie località all'interno della riserva Parque Luro, situata in un'area con boschi xerofili a Prosopis caldenia. Lo studio di 1241 campioni ha rivelato un'elevata prevalenza di roditori cricetidi Calomys sp., Akodon molinae and Eligmodontia typus, seguiti da altre 8 specie di roditori, una specie di marsupiali e uccelli e anfibi anuri indeterminati. Per il confronto delle diete sono state analizzate due sub-raccolte di borre di rapaci provenienti da un'area boscata relativamente indisturbata e da un sito disboscato. In queste aree sono state osservate differenze nei valori della FNB e nella prevalenza e composizione delle prede.

  8. RESPUESTAS FENOTÍPICAS DE Lippia alba Y Lippia origanoides (VERBENACEAE A LA DISPONIBILIDAD DE AGUA EN EL SUELO

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    Camargo Parra Andres Alejandro

    2008-12-01

    Full Text Available La capacidad de un genotipo particular de producir diferentes fenotipos es conocido como plasticidad fenotípica (PF. Este trabajo evaluó la PF a través de la ontogenia vegetativa en dos especies de la familia Verbenaceae, Lippia alba ampliamente distribuida en habitats favorables y Lippia origanoides ampliamente distribuida en habitats con bajo disponibilidad de recursos. Se evaluó si la PF está correlacionada con distribución ecologica, en respuesta al contenido relativo de agua en el suelo. Se distribuyeron aleatoriamente 40 plantas por tratamiento en tres tratamientos que variaron en la disponibilidad de agua en el suelo, evaluando distintos caracteres morfológicos y de asignación de biomasa, los resultados demuestran una falta de asociación entre PF y distribución ecología. Se observó una mayor PF en L. alba en la etapa temprana de la ontogenia vegetativa, demostrando que la PF a través de la ontogenia vegetativa no se presenta de forma uniforme, la amplia distribución ecológica de esta especie se explica por una mayor PF y asignación de biomasa en los diferentes componentes de la tasa de crecimiento relativa (RGR, ya que estos pueden ser ventajosos para alcanzar una rápida madurez sexual y colonizar nuevos hábitats con condiciones favorables. Contrario a nuestra hipótesis L. origanoides presentó una mayor PF durante la ontogenia vegetativa, los resultados demuestran una posible estrategia de tolerancia al estrés que le permite un bajo desempeño en el RGR en habitats con baja disponibilidad de recursos.

  9. A guardiã das tradições: a História e o seu código curricular The guardian of traditions: History and its curricular code

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    Katia Maria Abud

    2011-12-01

    Full Text Available Este trabalho estuda a permanência de conteúdos da História do Brasil nos programas escolares. Considera desde as primeiras formulações curriculares da disciplina nos programas do Colégio Pedro II até as propostas curriculares surgidas no final do século XX, para analisar a concepção da História escolar. Fundamenta-se no conceito de código curricular formulado por Raimundo Cuesta Fernández, que o entende como uma tradição social composta por ideias e princípios e por um conjunto de práticas profissionais que contribuem para fixar a História como disciplina escolar.This paper studies the permanency of some contents of Brazil's History in school programs. It refers to the first formulations of curricular programs in the discipline of the Pedro II Secondary School to the curriculum proposals raised in the late twentieth century, to analyze the schools conception of History. It is based on the concept of code curriculum formulated by Raimundo Cuesta Fernández, who understands how a social tradition consists of ideas and principles and practices of a group professionals practices who help to set school history as a discipline.

  10. A construção de uma alternativa curricular para a pré-escola: A experiência do NEI Canto da Lagoa The building of a pre-school curricular alternative: The NEI Canto da Lagoa experience

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    Ana Cristina Coll Delgado

    1998-08-01

    Full Text Available Este estudo tem como objetivo central compreender como ocorre a integração das questões socioculturais na proposta curricular e na prática pedagógica de uma unidade pré-escolar, na qual seus profissionais, em parceria com familiares e moradores de um local, construíram, num período de dez anos, um projeto político-pedagógico denominado "Em Busca de Uma Alternativa Curricular". Os eixos temáticos que direcionaram a investigação são: história e origem do projeto político-pedagógico, interações entre os diferentes atores sociais, currículo real e suas manifestações na prática pedagógica, cultura local e ampla, relações de idade e gênero.This study aims at understanding how the integration of sociocultural issues occurs on the curricular proposal and teaching practice of a pre-school unit where professionals, joined to relatives and neighborhood, constructed within ten years a political-teaching project named "Em Busca de uma Alternativa Curricular" (Searching for a Curriculum Alternative. The topics that conducted the investigation were: political-teaching project history and origin, interactions among different social actors, real curriculum and its demonstrations in the teaching practice, large and local culture, age and type relations.

  11. Diretrizes curriculares nacionais para os cursos de nutrição: avanços, lacunas, ambiguidades e perspectivas Curricular guidelines for nutrition courses: advances, ambiguities, omissions and perspectives

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    Nadia Tavares Soares

    2010-10-01

    Full Text Available As orientações curriculares e pedagógicas para a formação do profissional de nutrição receberam influência da dinâmica das transformações do ensino superior no Brasil. Em 2001, o Ministério da Educação instituiu as diretrizes curriculares nacionais para os cursos de graduação da área da saúde, em consonância com a Lei de Diretrizes e Bases da Educação. As diretrizes curriculares conformam uma nova baliza para o ensino em saúde a partir da extinção do currículo mínimo, considerado demasiadamente teórico, rígido e inflexível, não atendendo às exigências particulares de cada região, instituição ou curso, bem como às demandas sociais. As diretrizes curriculares representam ainda o desejo de superação da hegemonia do modelo biomédico e do ensino centrado no professor. O objetivo deste artigo é analisar criticamente os conteúdos das diretrizes curriculares para a graduação em nutrição e refletir sobre avanços, ambiguidades e lacunas, na perspectiva de uma implementação participativa e de avaliações constantes. O texto discute perfil do egresso, competências e habilidades e conteúdos de estudo, apontando para novas discussões sobre o que está proposto, fomentando possíveis cenários para o aperfeiçoamento do processo da formação em nutrição.The curricular and pedagogical guidelines for the formation of dieticians were influenced by the dynamic changes that occurred in higher education in Brazil. In 2001, the Ministry of Education instituted the national curricular guidelines for undergraduate health-related courses, in agreement with the Law of Education Guidelines and Fundamentals. These guidelines represented a new landmark for health-related education since it abolished the minimum curricular requirements, which were considered excessively theoretical and inflexible and did not meet the specific requirements of each region, institution or course, and the social demands. The curricular

  12. Uma hipótese curricular para a formação continuada de professores de Ciências e de Matemática Science and Mathematics teachers' continuing education: a curricular hypothesis

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    Carla Gonçalves Rodrigues

    2010-01-01

    Full Text Available Este artigo relata o desenvolvimento e a análise de uma proposta curricular para a evolução das concepções didático-metodológicas de professores de Ciências e de Matemática do Ensino Básico. Essa proposta desenvolveu-se no contexto do Programa de Pós-Graduação em Educação da Faculdade de Educação da Universidade Federal de Pelotas. Os objetivos, a estrutura curricular e as metodologias de ensino utilizadas foram referenciados pela proposta de formação continuada de professores do Grupo DIE-IRES, da Universidade de Sevilla, Espanha, que tem como meta desejável, a formação de um professor autônomo e investigador de sua ação docente, em um processo no qual os saberes didático-metodológicos e disciplinares são conteúdos relevantes para a complexificação de seu conhecimento profissional e de sua prática pedagógica.This paper describes the development and the analysis of a curricular proposal for basic educational level Science and Mathematics teachers' didactic-methodological conceptions evolution. This curricular proposal was carried out in the context of Pelotas Federal University' School of Education. Objectives, curricular structure, and teaching methodologies were guided by the DIE-IRES Group from the University of Sevilla, Spain, on-going teacher formation proposal, which has, as a desirable goal, the formation of an autonomous and investigative teacher in a process in which his/her didactic, methodological and disciplinary knowledge are considered essential for the complexification of his/her professional knowledge and his/her pedagogical practice.

  13. A DETERMINATION OF NEEDED ADJUSTMENTS AND EXTENSIONS IN THE CURRICULAR PATTERNS OF VOCATIONAL EDUCATION IN AGRICULTURE. FINAL REPORT.

    Science.gov (United States)

    TAYLOR, ROBERT E.

    TO MORE EFFECTIVELY MEET PREPARATORY TRAINING NEEDS IN NONFARM AGRICULTURAL OCCUPATIONS, THE ADJUSTMENTS AND EXTENSIONS NEEDED IN HIGH SCHOOL AND POST-HIGH SCHOOL CURRICULAR PATTERNS OF AGRICULTURAL VOCATIONAL EDUCATION WERE IDENTIFIED. COMMITTEE MEETINGS, AREA SEMINARS, AND A NATIONAL CONFERENCE WERE CALLED WHICH SUMMARIZED, INTERPRETED, AND…

  14. Meeting the Curricular Challenges of Inclusive Assessment: The Role of Alignment, Opportunity to Learn, and Student Engagement

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    Kurz, Alexander; Talapatra, Devadrita; Roach, Andrew T.

    2012-01-01

    Inclusive test-based accountability systems are intended to focus attention on the teaching and learning of important knowledge and skills for students with disabilities. Test score inferences to this end are often based on unverified assumptions of curricular alignment, access, and engagement. Focusing on students with disabilities, we discuss…

  15. School Knowledge, Cross-Curricularity and Teamwork Teaching in the Greek Primary School: Mathematics Education as Discursive Practice

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    Nikolakaki, Maria; Dossa, Katerina; Moraiti, Tzeni

    2012-01-01

    Through analysis of exercises offered in mathematics textbooks, this article investigates the discursive practice of cross-curricularity and group work teaching that was advocated in the 2007 reform of mathematics education in Greek primary schools. The conclusion of the research is that the organisation of school knowledge is vertical, and strong…

  16. The Co-Authored Curriculum: High-School Teachers' Reasons for Including Students' Extra-Curricular Interests in Their Teaching

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    Hagay, Galit; Baram-Tsabari, Ayelet; Peleg, Ran

    2013-01-01

    There is increasing evidence of a gap between curricular requirements and what students actually want to know. One of the factors influencing what is taught in the classroom is teachers' attitudes towards integrating their students' interests. This study investigated what prompts high-school teachers who prepare students for national matriculation…

  17. Agricultural Science and Technology Teachers' Perceptions of iPod and Mp3 Technology Integration into Curricular and Cocurricular Activities

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    Murphrey, Theresa Pesl; Miller, Kimberly A.; Roberts, T. Grady

    2009-01-01

    The purpose of this study was to describe agricultural science and technology teachers' reaction to iPod and mp3 technology use and potential use in both curricular and cocurricular activities. A total of 112 unique respondents provided written responses to open-ended questions. Study findings reveal that agricultural science and technology…

  18. Language in African Education: A Comparative Analysis of the Curricular Elements of School Texts. Occasional Paper No. 2.

    Science.gov (United States)

    Okonkwo, Chuka

    A study of the relationship between the language medium and the content of education is summarized. Language and curricular contents of English and Igbo language texts used in Nigerian primary schools between 1957 and 1976 are examined according to fifteen categories. Research is reviewed which supports the hypothesis that a change from English to…

  19. Ecology and the Environment. Language Arts around the World, Volume V. Cross-Curricular Activities for Grades 4-6.

    Science.gov (United States)

    McAllister, Elizabeth A.; Hildebrand, Joan M.; Ericson, Joann H.

    Suggesting that students in the intermediate grades can explore the world around them and practice valuable skills in spelling, reading, writing, communication, and language, this book presents cross-curricular units designed to integrate language-arts activities into the study of ecology and the environment. The units in the book reach diverse…

  20. Does Raising the Bar Level the Playing Field?: Mathematics Curricular Intensification and Inequality in American High Schools, 1982-2004

    Science.gov (United States)

    Domina, Thurston; Saldana, Joshua

    2012-01-01

    Over the past three decades, American high school students' course taking has rapidly intensified. Between 1982 and 2004, for example, the proportion of high school graduates who earned credit in precalculus or calculus more than tripled. In this article, the authors investigate the consequences of mathematics curricular intensification for social…