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Sample records for alba como sustituto

  1. PROPAGACIÓN In Vitro DEL PLÁTANO MACHO (Musa sp. AAB) CLÓN SOBRINO CON LOS BIOESTIMULANTES CUBANOS BB-6 Y BIOSTAN COMO SUSTITUTOS DE LOS REGULADORES DEL CRECIMIENTO

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    E. Héctor; Torres, A; S. Algoe; M. Cabañas; López, A.

    2007-01-01

    La posibilidad de emplear bioestimulantes cubanos, como sustitutos de los reguladores del crecimiento convencionales, en la propagación masiva de los plátanos y bananos abriría una nueva perspectiva, para las biofábricas que actualmente se dedican a la multiplicación del género Musa en Cuba, e incrementaría las potencialidades exportables de los productos biotecnológicos cubanos. Se estudió el efecto de los bioestimulantes cubanos, BB-6 y Biostan, como sustitutos potenciales de los reguladore...

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

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    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...

  3. Artrodese na coluna cervical utilizando SICAP como substituto de enxerto ósseo Artrodesis en la columna cervical utilizando SICAP como sustituto de injerto óseo Cervical spine fusion utilizing silicated calcium phosphate bone graft substitute (SICAP

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    Juliano Fratezi

    2011-01-01

    Full Text Available OBJETIVO: Substitutos de enxerto ósseo autólogo foram desenvolvidos para evitar as complicações da retirada de enxerto ósseo autólogo. SiCaP (Actifuse, ApaTech EUA, Reino Unido é um enxerto ósseo composto de cálcio-fosfato com um substituição de silicato na estrutura química, com uma estrutura tridimensional que parece osso natural. MÉTODOS: 19 pacientes foram submetidos à fusão óssea cervical e analisados retrospectivamente. A avaliação radiográfica e avaliação clínica foram realizadas utilizando o questionário Neck Disability Index e a escala análoga da dor (VAS pré- e pós-operação. RESULTADOS: O período médio de acompanhamento pós-operatório foi de 14 meses ± 5 meses (7-30 meses. 11 pacientes foram submetidos à fusão via anterior; 5 pacientes via posterior e 3 pacientes via anterior e posterior. A revisão radiográfica mostrou 19/19 (100% de fusão óssea, nenhum caso apresentou subsidência, quebra ou soltura de material de implante ou movimento nos níveis fusionados. Nenhum exemplo de ossificação heterotópica ou de crescimento ósseo intracanal foi observado. Clinicamente, os escores médios do Neck Disability decresceram 13,3 pontos (media pré-op. de 34,5, pós-op. de 21,2, melhora de 39%, a média da VAS para dor cervical decresceu 2 pontos (2,7 pré-op para 0,7 pós-op.; melhora de 74,1%. Não foram observadas complicações como infecção, osteólise ou edema excessivo das partes moles. CONCLUSÃO: Os resultados preliminares obtidos nesta série foram encorajadores com o uso do SICaP como enxerto ósseo, com sólida fusão óssea obtida em todos os casos e sem formação de ossificação heterotópica ou crescimento de osso intracanal. SIcaP demonstra ser um substituto confiável para o enxerto ósseo autólogo na coluna cervical.OBJETIVO: Sustitutos de injerto óseo autólogo fueron desarrollados para evitar las complicaciones de la recogida de injerto óseo autólogo. SiCaP (Actifuse, Apa

  4. Valorización de cascote cerámico como sustituto de materias primas para tejas de hormigón

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    Marín, Félix P.; Sánchez de Rojas, María Isabel; Rivera Lozano, Julián; Frías Rojas, Moisés

    2005-01-01

    [ES] El cascote es un material de desecho procedente de productos cerámicos o de la elaboración de los mismos que puede ser reciclado dentro del sector de la construcción, ya sea como árido o como adición del cemento con propiedades puzolánicas. El trabajo aborda la valorización de cascote, procedente de fábricas de tejas, ladrillos y elementos estructurales de arcilla cocida, para utilizarlo como sustitución parcial de dos tipos de materias primas, áridos y cemento, utilizadas para la ...

  5. La influencia de las cenizas volantes como sustituto parcial del cemento Pórtland en la durabilidad del hormigón

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    Molina Bas, Omar I.

    2008-01-01

    La durabilidad del hormigón, especialmente del hormigón armado, está muy influenciada por la capacidad de transporte de líquidos y gases a través de su red porosa. El uso de cenizas volantes como adición del hormigón está ampliamente extendido por dos razones: el ahorro económico que supone la reducción del cemento empleado y los cambios microestructurales motivados por la adición. Sobre este segundo punto existe consenso en considerar que las cenizas generan un hormigón más compacto y una re...

  6. Terapia de vacío como adyuvante para el uso de sustitutos dérmicos monocapa Combined use of vacuum assited device and dermal monolayer substitutes

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    J.R. Martínez-Méndez

    2010-12-01

    Full Text Available El método de elección para la cobertura de algunos defectos cutáneos es el autoinjerto de piel parcial; sin embargo, sufre retracciones que pueden adquirir gran relevancia sobre áreas especiales. Diferentes autores han intentado evitar estos déficits funcionales mediante la interposición de matrices de regeneración dérmica monocapa e injerto en un solo tiempo quirúrgico. Diseñamos un estudio para comparar la tasa de integración de los injertos sobre una matriz monocapa con y sin la aplicación de terapia de vacío tipo VAC® sobre ellos. Se aleatorizaron 20 pacientes con defectos cutáneos sobre áreas especiales en 2 grupos. Recogimos los datos epidemiológicos y la etiología del defecto (quemadura aguda, secuelas de quemadura o defectos secundarios a extracción de colgajo fasciocutáneo. En 10 casos (Grupo I se aplicó matriz dérmica monocapa Matriderm® más un injerto cutáneo de piel parcial, realizando un cambio de vendaje a los 7 días y luego cada 3-4 días hasta su estabilización. En otros 10 pacientes (Grupo II, tras realizar el mismo protocolo quirúrgico se aplicó VAC® durante una semana y se cambió hasta la estabilización del injerto. La evaluación del prendimiento del injerto y su estabilidad la realizó un observador ciego. Se recogieron todas las complicaciones surgidas en el postoperatorio hasta 3 meses después de la estabilidad del injerto. Comprobamos la homogeneidad de ambos grupos para las variables epidemiológicas de los pacientes, así como para la etiología de los defectos. La media de tiempo hasta el prendimiento fue de 17,6 ± 8 días, de forma global con una tasa de complicaciones del 20 %. Al estratificar en 2 grupos encontramos que las diferencias en la tasa de complicaciones no eran estadísticamente significativas. El tiempo hasta el prendimiento era de 21,4 ± 9 días en el grupo I, frente a 13,9 ± 4 días en el grupo II. Estas diferencias sí eran estadísticamente significativas. Como

  7. El cooperativismo como nueva forma de integración: ALBA-Energía

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    Villalobos Soto, Dani José; Pinho De Oliveira, María Fátima

    2012-01-01

    Desestabilización y la dificultad para cumplir con la cuota de suministro de petróleo en los países de América latina y del Caribe han generado en estas economías evidentes y consuetudinarias crisis económicas que difícilmente enfrentan. Sin embargo, estos países están en la búsqueda de acuerdos y alianza que permitan darles respuestas eficientes y efectivas a los problemas económicos, sociales. Políticos yculturales. El ALBA, Alternativa Bolivariana para América, cuyo objetivo más importante...

  8. Comportamiento productivo de reproductoras porcinas alimentados con follaje fresco de Morus alba. IIndicadores hematológicos y estructurales

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    Contino Yuván; Ojeda Félix; Herrera Rafael; Altunaga Nancy; Pérez Guadalupe.

    2008-08-01

    Full Text Available El objetivo de esta investigación consistió en evaluar el comportamiento hematológico, morfométrico e histológico de las reproductoras porcinas alimentadas con follaje fresco de Morus alba (hojas y tallos tiernos como sustituto parcial del concentrado comercial en diferentes estados reproductivos comparadas con un grupo control el que no consumió el follaje fresco como sustituto parcial del concentrado. Las investigaciones se efectuaron en el Módulo de Investigación-Producción Porcina de la EEPF “Indio Hatuey. Los indicadores hematológicos medidos fueron el hematocrito, la hemoglobina y el leucograma con diferencial, en el Laboratorio Provincial del IMV ubicado en el municipio de Jovellanos. Elanálisis morfométrico de los órganos del tracto gastrointestinal,hemolinfopoyéticos y accesorios, se realizó mediante la medición y elpesaje en las reproductoras posterior al sacrificio. El rocesamiento histológico se realizó mediante la tinción hematoxilina-eosina. En el estudio estadístico se empleó el paquete SPSS Versión 10.1. Se obtuvo un mejor comportamiento hematológico, morfométrico e histológico al incluir en la dieta de las reproductoras el follaje de morera fresca como sustituto parcial del concentrado. Los resultados demuestran la factibilidad económica del empleo de esta alternativa alimentaría.

  9. Antonio Fernández-Alba: “Me encuentro como en un archipiélago en bruma”

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    Fernández Alba, Antonio

    2008-01-01

    Hace veinte años, con motivo de la inauguración del entonces Centro de Arte Reina Sofía, el arquitecto Fernández-Alba afirmaba que para que un espacio restaurado perviva ha de huir de una cosmética de formas materiales aleatorias y, por el contrario, integrar la racionalización de las entidades políticas, culturales, sociales y económicas que constituyen los motivos de su evolución. Desde entonces no se ha cansado de ponerlo en práctica en el ejercicio de su profesión y de repetirlo ...

  10. Bacteriocinas: sustituto de preservantes tradicionales en la industria alimentaria

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    Carolina Rojas

    2008-05-01

    Full Text Available Durante los últimos años, el consumidor se ha vuelto más exigente en cuanto a calidad y expectativas de un producto saludable y fresco. Para satisfacer al consumidor es necesario investigar y encontrar opciones que permitan obtener alimentos que ofrezcan características interesantes, como es el caso de alimentos donde la tendencia es eliminar el uso de preservantes y obtener productos más naturales. Las bacteriocinas han atraído la atención como sustituto potencial de compuestos preservantes porque son producidas por bacterias consideradas benéficas para la salud y en la producción de alimentos. Estos compuestos purificados o semipurificados pueden ser utilizados como biopreservantes en alimentos para la reducción o eliminación de ciertos microorganismos de deterioro y algunos patógenos como Listeria monocytogenes. (Joerger, 2003; Ogunbanwo et al, 2003.La presencia de las bacterias productoras de bacteriocinas pueden ser un componente de la flora natural o añadido como cultivo iniciador (Svetoslav et al, 2004. Sin embargo, mucho del trabajo realizado hasta ahora se ha centrado en el estudio de bacteriocinas producidas por bacterias lácticas LAB, debido a su amplia aplicación en productos lácteos y fermentados (Visan et al, 2005 y se cree que su aplicación podría ser, de manera general, en la industriaalimentaria. Debido a este factor no claro aún, se pretende con este trabajo explicarqué son las bacteriocinas, cómo actúan y si se tiene claro el concepto correcto de la aplicación de estos compuestos en la industria alimentaria para llegar a ser la alternativa que permita sustituir los preservantes por compuestos naturales.

  11. Análisis experimental de la influencia del intercambiador intermedio en el desempeño de un sistema de compresión de vapor trabajando con R1234yf como sustituto directo al R134a

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    Molés Ribera, Francisco

    2014-01-01

    Treball de Fi de Màster universitari en Eficiència Energètica i Sostenibilitat en Instal·lacions Industrials i Edificació Los sistemas de producción de frío por compresión de vapor cuentan actualmente con un amplio censo de potencia instalada, tanto en instalaciones de refrigeración como de climatización. Durante las últimas décadas se ha incrementado la preocupación medioambiental en lo referente a la producción de frío, principalmente asociada a las propiedades del refrige...

  12. Sustitutos e injertos de piel desarrollados por ingeniería de tejidos

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    María Inés Chaves-Rodríguez; Laura A. Calvo-Castro; Ricardo Alvarado-Meza; Olman Madrigal-Monge; Andrea Ulloa-Fernández; Carolina Centeno-Cerdas

    2015-01-01

    La reconstrucción de tejidos y órganos mediante ingeniería de tejidos ha permitido la elaboración y comercialización de diversos sustitutos o equivalentes epiteliales, que han sido utilizados desde hace más de 30 años a escala internacional para el tratamiento de lesiones en pacientes humanos. Estos injertos o implantes se confeccionan con materiales biodegradables (naturales o polímeros sintéticos) que sirven como matrices para la adhesión y proliferación celular y pueden contener células de...

  13. Urea de lenta degradación ruminal como sustituto de proteína vegetal en dietas para rumiantes - Slow release urea as substitute for plant protein in diets for ruminants

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    Martínez Marín, Andrés L.

    2009-12-01

    Full Text Available ResumenEl objetivo del presente trabajo es revisar críticamente el interés de los nuevos productos de urea de lenta degradación ruminal en el diseño de dietas para rumiantes. Previamente, la historia del uso de los compuestos nitrogenados no proteicos en la alimentación animal y los aspectos claves del metabolismo de la urea de los rumiantes sonrepasados de manera breve. Hace más de medio siglo que se descubrióque distintos productos nitrogenados no proteicos pueden sustituir a los concentrados de proteína vegetal como fuentes de nitrógeno en lasdietas de los rumiantes gracias a los microorganismos del rumen. Estosson capaces de utilizar el nitrógeno no proteico para la síntesis deproteína microbiana cuyo elevado valor biológico permite cubrir,normalmente, la mayoría de las necesidades nitrogenadas de losrumiantes. Entre todos los productos nitrogenados no proteicos, la urea ha alcanzado preponderancia a pesar de diversos inconvenientes entre los que destaca la elevada velocidad de degradación ruminal y laconsiguiente liberación brusca de amoníaco. Aunque en las décadaspasadas se han investigado distintos productos y tratamientos pararalentizar la degradación ruminal de la urea, ninguno ha adquiridoespecial relevancia. Actualmente se comercializan nuevos productos deurea de lenta degradación ruminal cuyo mayor interés es,probablemente, la posibilidad de reemplazar eficazmente parte de laproteína vegetal en las dietas de los rumiantes sin los inconvenientespropios de la urea. Sin embargo, más investigaciones son necesarias para establecer las mejores condiciones de utilización de dichosproductos en el diseño y la formulación de dietas.SummaryIn the present work, the interest of the new available products of slow rumen degradable urea is examined. Previously, the history of the use of nonprotein nitrogen compounds in animal feeding and the key aspects of urea metabolism in the ruminants are reviewed briefly. Over half a

  14. Sustitutos lecheros en la alimentación de terneros (Substitutes milkmen in the feeding of calves

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    Berta Garzón Quintero

    2007-05-01

    Full Text Available Una de las ventajas más notables en la crianza artificial del ternero es la posibilidad de utilizar sustitutos lecheros, cuyos precios son inferiores a la leche entera. En la presente monografía se analizanfundamentos anatómicos y fisiológicos del aparato digestivo del ternero, el calostro, la leche entera y los sustitutos de leche. Sediscute como la edad de inicio del consumo de sustituto, las cantidades ofrecidas, los niveles de reconstitución y la frecuencia desuministro modifican el esquema de alimentación de los terneros. Se valora como con el uso de sustituto lechero, es posible ahorrar 180 litros de leche fresca por ternero, comparado con la utilización deleche fresca, con un Kg. de sustituto lechero, se pueden sustituir 5,81 litros de leche. Con el conocimiento actual es posible diseñarestrategias de manejo que permitan el empleo de sustitutos lecheros en la alimentación de terneros, ya que reduce el costo de la crianza y destinar aproximadamente el 50 % de la leche que consume el ternero, para el consumo humano.One of the most remarkable advantages in the artificial upbringing of the calf is the possibility to use substitute’s milkmen whose prices are inferior to the whole milk. In the present monograph anatomical and physiologic foundations of the digestive system of the calf, the calostro, the whole milk and the substitutes of milk are analyzed. You discusses as the age of beginning of substitute's consumption, theoffered quantities, the rebuilding levels and the supply frequency modify the outline of feeding of the calves. It is valued like withsubstitute's milkman use, it is possible to save 180 litres of fresh milk for calf, compared with the use of fresh milk, with a Kg. of substitute milkman, 5,81 litres of milk can be substituted. With the current knowledge it is possible to design handling strategies that allow the employment of substitute’s milkmen in the feeding of calves,since it reduces the cost of the

  15. Sustitutos cutáneos desarrollados por ingeniería de tejidos = Skin substitutes developed by tissue engineering

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    Arenas Gómez, Claudia Marcela

    2012-01-01

    Full Text Available La piel es un tejido complejo vulnerable a procesos que alteran su estructura, integridad y funcionalidad como, por ejemplo, quemaduras, heridas crónicas y diversas enfermedades congénitas. Los avances tecnológicos en la fabricación de biomateriales y en el cultivo de células han permitido la producción de sustitutos cutáneos que han sido una alternativa terapéutica para algunas de estas complicaciones. Esta revisión pretende actualizar los aspectos generales, composición, perspectivas futuras y de aplicación de los principales sustitutos cutáneos que se ofrecen actualmente en el mercado internacional. Igualmente, presentará algunas experiencias del Grupo de Ingeniería de Tejidos y Terapias Celulares (GITTC de la Facultad de Medicina de la Universidad de Antioquia.

  16. Evaluación de la biocompatibilidad y eficiencia como sustituto artificial de soportes de colágeno tipo I asociados con extractos decaléndula (Calendula officinalis) en heridas cutáneas en un modelo animal lagomorfo

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    Millán Cortes, Diana Milena

    2014-01-01

    En Colombia la incidencia de lesiones que ocasionan pérdida de continuidad de piel y requieren de injertos para su tratamiento, es alta. El tratamiento estándar es el autoinjerto; sin embargo, al obtener tejido propio se genera una nueva lesión que cierra por segunda intención que al cicatrizar puede tener compromisos cosméticos, funcionales y anatómicos. Los sustitutos de piel desarrollados por la ingeniería de tejidos son una alternativa para superar estos inconvenientes, ya que permiten re...

  17. Las razones de la elección de don Luis de Requesens como gobernador de los Países Bajos tras la retirada del duque de Alba (1573)

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    Julie VERSELE

    2009-01-01

    RESUMEN: El presente estudio pretende determinar cuáles fueron las razones que movieron a Felipe II a nombrar a don Luis de Requesens como gobernador general de los Países Bajos después del fracaso del duque de Alba, en 1573. Alejado del partidismo cortesano, don Luis carecía de carisma y no era fundamentalmente opuesto a los preceptos políticos del Gran Duque, pero sí pertenecía a un círculo de letrados y de diplomáticos, antiguos colaboradores del cardenal Espinosa y desligados físicamente ...

  18. Sustitutos cutáneos desarrollados por ingeniería de tejidos = Skin substitutes developed by tissue engineering

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    Arenas Gómez, Claudia Marcela; Merizalde Soto, Gabriel Jaime; Restrepo Múnera, Luz Marina

    2012-01-01

    La piel es un tejido complejo vulnerable a procesos que alteran su estructura, integridad y funcionalidad como, por ejemplo, quemaduras, heridas crónicas y diversas enfermedades congénitas. Los avances tecnológicos en la fabricación de biomateriales y en el cultivo de células han permitido la producción de sustitutos cutáneos que han sido una alternativa terapéutica para algunas de estas complicaciones. Esta revisión pretende actualizar los aspectos generales, composición, perspectivas futura...

  19. Las razones de la elección de don Luis de Requesens como gobernador de los Países Bajos tras la retirada del duque de Alba (1573

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    Julie VERSELE

    2009-12-01

    Full Text Available RESUMEN: El presente estudio pretende determinar cuáles fueron las razones que movieron a Felipe II a nombrar a don Luis de Requesens como gobernador general de los Países Bajos después del fracaso del duque de Alba, en 1573. Alejado del partidismo cortesano, don Luis carecía de carisma y no era fundamentalmente opuesto a los preceptos políticos del Gran Duque, pero sí pertenecía a un círculo de letrados y de diplomáticos, antiguos colaboradores del cardenal Espinosa y desligados físicamente del mundo cortesano, entre los cuales conviene destacar a Juan de Zúñiga, Granvela y Benito Arias Montano.ABSTRACT: This paper is pretending to show what were the reasons that drove Philip II, in 1573, to appoint don Luis de Requesens governor general of the Netherlands foliowing the Duke of Alba failure. Far away from a courtly «partidism», don Luis was in a lack of charisma and was not basically opposed to the political precepts of the Duke, but belonged to a circle of literates and diplomáis, oíd cardinal Espinosa collaborators and physically turned away from this courtly world, among which It is used to bring Juan de Zúñiga, Granvelle and Benito Arias Montano to the fore.

  20. Actividad antibacteriana de Lippia alba

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    Nogueira, Marisa A.; Díaz, Gaspar; Sakumo, Luciana; Tagami, Patrícia M.

    2007-01-01

    Lippia alba (Mill.) N. E. Brown. (Verbenaceae) es una especie ampliamente utilizada en la medicina popular en Brasil como digestivo y antiséptico. La caracterización preliminar de los aceites esenciales obtenidos de las partes aéreas de la planta fue realizada por CG/EM. Con estos aceites esenciales se llevaron a cabo los análisis de la actividad antibacteriana. Los resultados encontrados mostraron una amplia actividad antibacteriana, confirmando así el uso de esta planta en la me...

  1. Análisis correlatorio y espectral de los caudales del manantial de Iturriotz (Vizcaya: El sistema del barranco de Peñalba como ejemplo de un tipo de Karst de caraclerísticas mixtas

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    García-Latorre, F.

    1987-08-01

    Full Text Available In order to define the structure of the time series of rainfall and discharge, and also to improve the knowledge of the Barranco Peñalba karstic system, a correlation and spectral analysis has been made of the Iturriotz spring and the Juncal pluviometer data (period: 6th August 1983 to 12th October 1985. Such analysis reveals a relatively important memory effect and a regulation time of 23,5 days. However, it has been made clear a very small modulation effect with a spectral band of 0.30-0.32. The cross correlation reveals a lag very small between the input and output signals, in spite of the existence of a some regulation power at the end of the impulsional answer. These results do not match exactly any of the type-model defined by Mangin (1982, but suggests a system with mixed characteristics. The apparently contradictory features inferred from this analysis can be atributed to the heterogeneity of the aquifer materials and to the complexity of the recharge mecanisms.Con objeto de definir la estructura de las series cronológicas de lluvias y caudales, así como para mejorar el conocimiento del sistema kárstico del barranco de Peñalba, se ha aplicado el análisis de correlación y espectral a los datos del manantial de Iturriotz y del pluviómetro del Juncal, del período 6 de Agosto de 1983 a 12 de Octubre de 1985. Dicho análisis revela un efecto memoria relativamente importante y un tiempo de regulación de 23,5 días; sin embargo, se pone de manifiesto un efecto de filtro muy reducido, con una banda espectral de 0.30-0.32; el correlograma cruzado evidencia un desfase muy corto entre las señales de entrada y salida, a pesar de que existe un cierto poder regulador al final de la respuesta impulsional. Estos resultados no corresponden exactamente a ninguno de los modelos-tipo definidos por Mangin (1982, sino que sugieren un sistema de características mixtas. Los rasgos aparentemente contradictorios que se deducen de este análisis pueden

  2. Sustitutos e injertos de piel desarrollados por ingeniería de tejidos

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    María Inés Chaves-Rodríguez

    2015-05-01

    Full Text Available La reconstrucción de tejidos y órganos mediante ingeniería de tejidos ha permitido la elaboración y comercialización de diversos sustitutos o equivalentes epiteliales, que han sido utilizados desde hace más de 30 años a escala internacional para el tratamiento de lesiones en pacientes humanos. Estos injertos o implantes se confeccionan con materiales biodegradables (naturales o polímeros sintéticos que sirven como matrices para la adhesión y proliferación celular y pueden contener células de diversos orígenes (autólogas, alogénicas o xenogénicas. Su principal ventaja clínica consiste en proporcionar una reepitelización efectiva en lesiones de gran extensión, lo que es particularmente relevante cuando hay poco tejido disponible para hacer autoinjertos. Además, ofrecen una cobertura al lecho de la lesión, evitando la deshidratación y las infecciones microbianas. Sin embargo, aún existen numerosos retos para asegurar la funcionalidad inmediata y la permanencia a largo plazo de los implantes, así como la reproducción exacta de la estructura y fisiología normal del tejido. En Costa Rica, el Centro de Investigación en Biotecnología del Instituto Tecnológico de Costa Rica cuenta con el único laboratorio en el país dedicado al cultivo in vitro de células de piel para la reconstrucción de equivalentes epiteliales con fines terapéuticos.

  3. Pityriasis Alba with Poliosis

    International Nuclear Information System (INIS)

    Pityriasis alba is a skin disease, commonly seen in children and young adults. This case presents the ocular association of this disease in a 10 years old Pakistani male. Ocular features in this case were poliosis, tilted disc, high myopia and chorioretinal degeneration. Tilted discs and high myopia can be coincidental but poliosis and decreased pigment in retinal pigment epithelium are closely related with the hypopigmentation seen in this disease. (author)

  4. Producción de tilapia nilótica (Oreochromis niloticus L. utilizando hojas de chaya (Cnidoscolus chayamansa McVaugh como sustituto parcial del alimento balanceado Nile tilapia production (Oreochromis niloticus L. using tree spinach leaves (Cnidoscolus chayamansa McVaugh as a partial substitute for balanced feed

    Directory of Open Access Journals (Sweden)

    Gaspar R Poot-López

    2012-11-01

    Full Text Available La acuicultura es una alternativa para la producción de proteína de alta calidad a bajo precio, particularmente en países en desarrollo y desabasto de alimentos. En zonas rurales, la disponibilidad de insumos alternativos es clave para mejorar la producción en el cultivo de peces, sobre todo si dichos insumos se usan en forma cruda. Una opción son las hojas de chaya (Cnidoscolus chayamansa, arbusto que crece en México, Centroamérica y Sudamérica. En este estudio se evaluó durante dos épocas climáticas (cálida y fría la supervivencia, tasa de crecimiento y tasa de conversión alimenticia de juveniles de tilapia (7-4,5 g, al sustituir parcialmente la ración de alimento balanceado (25 y 50% con hojas crudas de chaya (ad libitum, en un diseno experimental completamente al azar, con dos tratamientos y un control (00% de la ración a base de alimento balanceado, con tres réplicas cada uno por época climática. Las densidades fueron de 36 peces m-3 por réplica en la época fría y de 44 peces m-3 por réplica en la época cálida. Los resultados indican que los tratamientos con 50 y 75% de alimento balanceado y chaya, en ambas épocas climáticas, tuvieron una ganancia de peso similar a la de los organismos que se alimentaron con la dieta control. Durante la época fría se observaron efectos adversos en la supervivencia, peso ganado y tasa de conversión alimenticia en todos los tratamientos, lo cual no ocurrió en la época cálida. Al incluir hojas de chaya en la dieta de las tilapias, la tasa de conversión alimenticia de alimento balanceado se redujo de 9,7 a 33,62% en la época fría y de 5,38 a 40,23% en la época cálida. Los resultados muestran que el uso de insumos complementarios disponibles regionalmente como la chaya, puede favorecer el desarrollo de cultivos de tilapia a pequena escala en los trópicos.Aquaculture is an alternative for the production of high-quality, low-cost protein, particularly in developing countries

  5. Formación in-situ de circonia en la síntesis de sustitutos óseos basados en matriz de alúmina-circón infiltrada con hidroxiapatita

    OpenAIRE

    García, Carlos; García, Claudia; Paucar, Carlos

    2010-01-01

    El desarrollo de materiales capaces de satisfacer los requerimientos de un sustituto óseo, es un gran desafío científico y tecnológico desde el punto de vista de la biocompatibilidad así como del control de la microestructura porosa que promueva la oseointegracion y aumente el desempeño mecánico de los implantes. En este trabajo, se presenta la preparación de materiales porosos mediante el uso repetido de la técnica de infiltración con suspensiones cerámicas. Los materiales obtenidos fuero...

  6. Construcción de un "perfecto" albañil

    OpenAIRE

    BRAVO RAMÍREZ, ROBERTO

    2011-01-01

    La idea principal de este proyecto es el estudio pionero, dentro del sector de la construcción español, del trabajo y las experiencias laborales de los integrantes en el oficio de albañil. Albañil es "el maestro u oficio de albañilería". De esta definición podemos deducir que el trabajo del albañil puede considerarse como un arte, por tanto es una actividad para la cual es necesario tener formación y experiencia. Bravo Ramírez, R. (2011). Construcción de un "perfecto" albañil. http://hdl.h...

  7. Suplementos enterales: ¿complementos o sustitutos de la dieta?

    Directory of Open Access Journals (Sweden)

    M. Martínez Sogues

    2006-10-01

    prescribieron mayor número de suplementos fueron hematología (22,1% y medicina interna (20,8%.La neoplasia digestiva fue el diagnóstico de ingreso más frecuente (27,3%. La indicación mayoritaria fue el kwashiorkor (45,5%, observándose un 15,6% de pacientes no malnutridos. La duración media del tratamiento fue de 11 días (DE = 11,1 y el principal motivo de fin, el alta hospitalaria (70,1%. El suplemento se prescribió concomitante con las comidas en el 70,6% de los casos y gustó a más de la mitad de los pacientes (70,1%, siendo el de tipo crema el más prescrito (61% y el líquido el mejor aceptado (78%. El promedio del aporte calórico diario ingerido con los alimentos de la dieta hospitalaria fue similar entre el día de la prescripción del suplemento y el tercer día (p = 0,879, así como entre el primero y el séptimo (p = 0,499. De forma parecida sucedía al valorar la ingesta proteica. Con la administración del suplemento, se produjo un aumento significativo en la ingesta del paciente de 310 kcal a los 3 días y de 337 kcal a la semana (p < 0,0005 en ambos casos.Resultados similares se obtuvieron en la valoración del aporte proteico total ingerido (p < 0,0005. Conclusiones: Los suplementos nutricionales se utilizan correctamente en la mayoría de los casos. Permiten aumentar significativamente el aporte calórico-proteicoingerido, no modificando la ingesta de la dieta hospitalaria, pudiendo ser una fuente nutrional apropiada que complemente a la dieta cuando ésta resulta insuficiente.

  8. Injertos sustitutos no óseos: Aportaciones del ácido poliláctico y poliglicólico Synthetic grafts materials: Polylactide and poliglycolide acid effects in bone regeneration

    Directory of Open Access Journals (Sweden)

    M. Marín Ruiz

    2009-04-01

    Full Text Available En el presente trabajo se realiza una revisión bibliográfica de los sustitutos no óseos disponibles en el mercado para mejorar y acelerar la regeneración ósea centrándonos en los polímeros de ácido poliláctico y poliglicólico por su relativa novedad para dicha aplicación. Los resultados obtenidos permiten confirmar la capacidad osteoconductora de dichos sustitutos en los procesos reparativos óseos pero a menudo también pueden actuar como barrera del proceso fisiológico de autorremodelación ósea al requerir un tiempo de reabsorción demasiado largo.The goal of the present study is to describe the nonbony sustitutes available to improve and to acelerate the bone regeneration pointing us polilactide and poliglycolide acid polymers by its relative newness for this application. The results confirm the osteoconductive capacity of this sustitutes in the bone regeneration even thought they can also be a barrier on the osseous autoremodelation of the physiological process as they need long time to be reabsorbed.

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

    OpenAIRE

    Aguiar, Jaciana S.; Maria C. C. D. Costa; Nascimento, Silene C.; Kêsia X. F. R. Sena

    2008-01-01

    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 antimicrobian...

  10. Formación in situ de circonia en la síntesis de sustitutos óseos basados en matriz de alúminacircón infiltrada con hidroxiapatita/ In situ formation of zirconia in the bone substitute synthesis based on aluminazircon matriz infiltrated with hydroxyapatite.

    OpenAIRE

    García Negrete, Carlos Andrés; García García, Claudia Patricia; Paucar Álvarez, Carlos Guillermo

    2010-01-01

    El desarrollo de materiales capaces de satisfacer los requerimientos de un sustituto óseo, es un gran desafío científico y tecnológico desde el punto de vista de la biocompatibilidad así como del control de la microestructura porosa que promueva la oseointegracion y aumente el desempeño mecánico de los implantes. En este trabajo, se presenta la preparación de materiales porosos mediante el uso repetido de la técnica de infiltración con suspensiones cerámicas. Los materiales obtenidos fueron c...

  11. Major Martian Volcanoes from MOLA - Alba Patera

    Science.gov (United States)

    2000-01-01

    Two views of Alba Patera with topography draped over a Viking image mosaic. MOLA data have clarified the relationship between fault location and topography on and surrounding the Alba construct, providing insight into the volcanological and geophysical processes that shaped the edifice. The vertical exaggeration is 10:1.

  12. Evaluación de diferentes sustitutos de trigo en la elaboración de pan.

    OpenAIRE

    JORGE SÁNCHEZ, JOSÉ RAMÓN

    2015-01-01

    [ES] En el presente trabajo se pretende estudiar el comportamiento de las masas y panes al sustituir parcialmente la harina de trigo por diferentes sustitutos (salmón y merluza) en diferentes porcentajes (5% y 10%). Para ello se evaluaron las diferentes combinaciones comparándolas con el pan control a través del análisis de sus propiedades físicas. Tras los diferentes estudios se concluyó que se puede llegar a igualar el rendimiento productivo del pan control, incluso superarlo...

  13. Agua residual y complementada como sustituto del medio de cultivo "in vitro" de embriones de café

    Directory of Open Access Journals (Sweden)

    Ramos, RA.

    2001-01-01

    Full Text Available This work was carried out in Provincial Enterprise from Hydraulicai Resources of Santiago de Cuba and a Genetic Laboratory from Central Research Station of Coffee and Cacao, Tercer Frente, Santiago de Cuba province, from February to June of 1996 period. The "in vitro" culture of Coffea arabica L. 'Catuai Rojo' var. embryos was made as substitute the traditionally culture media using wastewater of Neat Enterprise of Santiago de Cuba as alone and mixed form with coconut milk and ammonium nitrate. Main chemical components were analysed at 19, 27, 36 and 44 days after culturing, the stem and root length were evaluated. The statistical analysis showed a significative difference between treatments. The best behaviour culture media were wastewater complemented with 500 mg. l1 or 1000 mg. V of ammonium nitrate.

  14. Agua residual y complementada como sustituto del medio de cultivo "in vitro" de embriones de café

    OpenAIRE

    Ramos, RA.; Cabrera, M.; Gonzalez, ME.; Landazury, S.; Girón, F.; Mederos, Y.

    2001-01-01

    This work was carried out in Provincial Enterprise from Hydraulicai Resources of Santiago de Cuba and a Genetic Laboratory from Central Research Station of Coffee and Cacao, Tercer Frente, Santiago de Cuba province, from February to June of 1996 period. The "in vitro" culture of Coffea arabica L. 'Catuai Rojo' var. embryos was made as substitute the traditionally culture media using wastewater of Neat Enterprise of Santiago de Cuba as alone and mixed form with coconut milk and ammonium nitrat...

  15. Gastroprotective effect of leaf extracts of Basella alba var. alba against experimental gastric ulcers in rats

    Directory of Open Access Journals (Sweden)

    Vijender Kumar

    2012-06-01

    Full Text Available The aqueous and ethanol extracts of the leaves of Basella alba L. var. alba Wight, Basellaceae, were investigated for antiulcer activity on rats employing the pylorus ligation and ethanol induced ulcer models. The various gastric secretion parameters such as total acidity, free acidity, gastric acid volume, pH and histopathological parameters such as ulcer index and percent protection were comparatively examined between control, test and standard groups. The antiulcer activity of aqueous extract of B. alba (AEBA and ethanol extract of B. alba (EEBA were studied in rats treated with the doses of 1 mL/kg of absolute ethanol, 200 and 400 mg of test extracts and 20 mg/kg of famotidine for control, test and standard groups respectively in both the models. The animals pretreated with AEBA and EEBA showed a dose-dependent protection against gross damaging action of ethanol and pylorus ligation on gastric mucosa of animals. Histopathological evaluation also revealed that Group I treated with absolute ethanol showed severe gastric mucosal damage. The AEBA and EEBA showed 68.25 and 58.11% protection in gastric mucosal damage as compared to control group. Both the extracts of B. alba var. alba were able to decrease the gastric acidity and increase the mucosal defense in the gastric mucosal area. This study indicate that B. alba var. alba possesses significant gastroprotective effect and the same is substantiated by the histopathological examination of the ulcerated stomachs of the animals.

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

    Directory of Open Access Journals (Sweden)

    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.

  17. Validación del uso de la levadura (Candida utilis NRRL Y-600, en la fabricación de los sustitutos lecheros

    Directory of Open Access Journals (Sweden)

    Carmen Amarilys Guevara-Rodríguez

    2012-01-01

    Full Text Available En Cuba, en la cría artificial de terneros, se utilizan reemplazantes lácteos de importación y el de producción nacional. Se tiene como objetivo evaluar la Levadura Torula de vinaza (Candida utilis NRRL Y-660 como componente proteico en el sustituto lácteo "Los Naranjos" que se suministra a partir de los 31días y hasta los 90 días de nacidos a los terneros. La muestra abarcó un total de 30 terneras de líneas de leche (Holstein puro y mestizo, distribuidas al azar en un diseño aleatorio en 3 tratamientos con 10 réplicas cada uno: T1 (control, T2 (50 % de Nuclimix y 50 % Levadura Torula de vinaza (Candida utilis NRRL Y-660 y el T3 (50 % de Nuclimix y 50 % Levadura Torula de miel (Candida utilis NRRL Y-660. El procesamiento de los datos se realizó mediante un método de comparación múltiple de Duncan. Se empleó el sistema de cómputo de datos STATGRAPHIC CENTURION XV. La ganancia media diaria no mostró diferencia significativa entre el tratamiento T2 con respecto al T3, y la ganancia con T2 y T3 fueron superiores al control. Los valores de T2 y T3 son significativamente mayores que los de T1, con un 95 % de confianza. El consumo en el T2 fue superior con relación a T3 y T1 en 0,17 y 25 kg, respectivamente. Se concluyó que con la inclusión en un 50 % de la Levadura Torula de vinaza se obtienen ganancias de peso vivo de 638 g/animal/día, con un potencial de entrega a la industria de 18 MM de litros de leche entera, y un beneficio para el país de 6,3 MM de USD/año.

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

    OpenAIRE

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

    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...

  19. Polygenic eruptions on Alba Patera, Mars

    International Nuclear Information System (INIS)

    A new model for the evolution of the martian volcano Alba Patera is constructed. Numerous digitate channel networks on the flanks of the volcano are interpreted to be carved by sapping due to the release of nonjuvenile water from unconsolidated flank deposits. The particle size of these deposits is estimated to be 3-10 microns, which, together with theoretical modelling of the disperison of explosively derived volcanic materials, leads to the conclusion that the flank deposits on Alba Patera are low-relief pyroclastic flows. The recognition of numerous late-stage summit and subterminal lava flows thus makes Alba Patera a unique martian volcano that is transitional between the older pyroclastic-dominated highland paterae and the more recent effusive central-vent volcanoes such as the Tharsis Montes. 61 refs

  20. 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

  1. IN-VITRO ANTI-INFLAMMATORY ACTIVITY OF LEAF EXTRACTS OF BASELLA ALBA LINN. VAR. ALBA

    Directory of Open Access Journals (Sweden)

    Vijender Kumar

    2011-06-01

    Full Text Available The leaf extracts of Basella alba Linn.var. alba were investigated for In-vitro anti-inflammatory activity by human red blood cell membrane stabilization method (HRBC. The increased use of natural product in the pharmaceutical industry has led to an increase in demand for screening for cost effective, nontoxic bioactive compounds in medicinal plants. Now a day’s many researchers interest is to search medicinal plants with potent therapeutic activity which may lead to the discovery of new therapeutic agent. In this work the methanolic extract of Basella alba (M.E.B.A. and aqueous extract of Basella alba (A.E.B.A. were studied for its in-vitro antiinflammatory activities. The potency of the extracts was compared with standard Diclofenac sodium (50 and 100 @g/ml. The aqueous extract showed the most significant membrane stabilizing action on human red blood cell membrane.

  2. IN-VITRO ANTI-INFLAMMATORY ACTIVITY OF LEAF EXTRACTS OF BASELLA ALBA LINN. VAR. ALBA

    OpenAIRE

    Vijender Kumar; Z. A. Bhat; Dinesh Kumar; Puja Bohra; S. Sheela

    2011-01-01

    The leaf extracts of Basella alba Linn.var. alba were investigated for In-vitro anti-inflammatory activity by human red blood cell membrane stabilization method (HRBC). The increased use of natural product in the pharmaceutical industry has led to an increase in demand for screening for cost effective, nontoxic bioactive compounds in medicinal plants. Now a day’s many researchers interest is to search medicinal plants with potent therapeutic activity which may lead to the discovery of new the...

  3. Gastroprotective effect of leaf extracts of Basella alba var. alba against experimental gastric ulcers in rats

    OpenAIRE

    Vijender Kumar; Z. A. Bhat; Dinesh Kumar; N A Khan; I. A. Chashoo; Irfat Ara

    2012-01-01

    The aqueous and ethanol extracts of the leaves of Basella alba L. var. alba Wight, Basellaceae, were investigated for antiulcer activity on rats employing the pylorus ligation and ethanol induced ulcer models. The various gastric secretion parameters such as total acidity, free acidity, gastric acid volume, pH and histopathological parameters such as ulcer index and percent protection were comparatively examined between control, test and standard groups. The antiulcer activity of aqueous extr...

  4. 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

  5. Geomorphology and stratigraphy of Alba Patera, Mars

    Science.gov (United States)

    Schneeberger, Dale M.; Pieri, David C.

    1991-01-01

    Geomorphic and stratigraphic analysis of Alba Patera suggests a volcanic construct built by lavas with rheologic properties similar to basalts. A series of evolving eruptive styles is suggested by changes in morphology and inferred progressive reductions in flow volume with higher stratigraphic position. Alba Patera's volcanic history has been summarized into four main phases. The first is characterized by extensive flood like flows presumably erupted from fissures associated with the initial intrusion of magma into the region. The second phase is associated with the emplacement of pyroclastic rock, a more speculative interpretation. The third phase produced the voluminous tabular, crested, and undifferentiated flows, probably from a more centralized vent source. The fourth and last phase is marked the effusion of levee like flows and the collapse of the summit calderas and final graben formation.

  6. Production rate of Morus Alba pollen grains in an abandoned M. Alba plantation

    OpenAIRE

    Kiyonaga, Jota

    2016-01-01

    As a basic study for pollen analysis, the production rate of Morus alba (white mulberry) pollen grains in an abandoned M. alba plantation was determined over a three-year period from 1997 to 1999. The number of pollen grains per male catkin was assessed and the fall rate of male catkins was measured using five litter traps. The mean production rate was 2.6 × 10^ grains ha^yr^ (range = 2.2-3.4 × 10^ grains ha^yr^). This is near the lower end of the range of pollen production rates that have be...

  7. USO DE BIOSÓLIDOS COMO REACTIVO ESPUMANTE EN PROCESOS DE FLOTACIÓN: CARACTERIZACIÓN FÍSICA Y QUÍMICA

    OpenAIRE

    LORENZO REYES-BOZO; RONALDO HERRERA-URBINA; ALEX GODOY-FAÚNDEZ; CÉSAR SÁEZ-NAVARRETE; MIGUEL HERRERA; ROSANNA GINOCCHIO

    2011-01-01

    La flotación espumosa usa diversos reactivos, orgánicos e inorgánicos, para aumentar el rendimiento y selectividad del proceso. La fl otación utiliza sustancias tensoactivas que se adsorben en la interfase aire/agua. Como potenciales sustitutos de los espumantes usados actualmente, se consideran los residuos orgánicos de origen animal, como los biosólidos. Este estudio, evalúa el uso de biosólidos y ácidos húmicos como agentes espumantes para fl otación espumosa, cuantifi cándose su capacidad...

  8. Estudo morfo-anotômico entre os caules de Lippia alba e Melissa officinalis

    Directory of Open Access Journals (Sweden)

    J.L.P. Ferreira

    2003-01-01

    Full Text Available São analisadas as características microscópicas entre os caules de Lippia alba e de Melissa officinalis, ambas conhecidas no Brasil como "ervas cidreiras" e consumidas pela população em virtude de suas propriedades sedativas e antiespasmódicas. A análise dos cortes transversais dos seus caules, que geralmente aparecem misturados às folhas das duas espécies em estudo, auxilia a diagnose da matéria prima vegetal.

  9. Uso de biosólidos como reactivo espumante en procesos de flotación: caracterización física y química

    OpenAIRE

    Herrera-Urbina, Ronaldo; GODOY-FAÚNDEZ, ALEX; SÁEZ-NAVARRETE, CÉSAR; Herrera, Miguel; GINOCCHIO, ROSANNA

    2011-01-01

    La flotación espumosa usa diversos reactivos, orgánicos e inorgánicos, para aumentar el rendimiento y selectividad del proceso. La flotación utiliza sustancias tensoactivas que se adsorben en la interfase aire/agua. Como potenciales sustitutos de los espumantes usados actualmente, se consideran los residuos orgánicos de origen animal, como los biosólidos. Este estudio, evalúa el uso de biosólidos y ácidos húmicos como agentes espumantes para flotación espumosa, cuantifi cándose su capacidad t...

  10. In vitro regeneration of Basella alba L

    Science.gov (United States)

    Edney, Norris Allen; Rizvi, Muhammad A.; Rizvi, Narjis F.

    1989-01-01

    Basella alba L. is a tropical vine used as a vegetable in some Asian and African countries. It has potential as a nontraditional crop for small family farms. A short day plant, it blooms during the fall, provided the temperatures are mild. In the southeastern U.S., the short days of fall are associated with subfreezing temperatures, and plants are killed before blooming. Attempts were made to regenerate the plant using tissue culture techniques. Several trials were conducted with different media, hormones, and explants. It was found that nodal segments on Gamborg medium regenerated shoots. Interaction studies of auxins and cytokinins indicated that its endogeneous auxin content might be high because callus proliferated in almost all treatments and roots initiated even when the medium was not supplemented with an auxin.

  11. Teelt Nerine flexuosa alba minder moeilijk dan aangenomen

    NARCIS (Netherlands)

    Brenk, van G.

    1985-01-01

    De bloei van Nerine flexuosa alba wordt voornamelijk beinvloed door de temperatuur. Per groei- en bloeicyclus vraagt deze Nerine eerst een lage temperatuur voor aanleg en ontwikkeling van de bloeiknoppen en daarna voor de bloei een hoge temperatuur

  12. 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.

  13. ASPECTS REGARDING CONSUMERS' PERCEPTION OFCORPORATE SOCIAL RESPONSIBILITY IN ALBA IULIA

    OpenAIRE

    Silvia Maican

    2014-01-01

    The main objective of the present paper is to present the way consumers in Alba Iulia,Romania, to perceive the concept of corporate social responsibility. The research represents thesummary of a larger research project pretested questionnaire. In order to achieve this objectivewe have applied a questionnaire to a number of 51 consumers from Alba Iulia. The data wereanalyzed with the help of SPSS software.The paper starts with a literature review in the area of corporate social responsibility ...

  14. Revisión taxonómica del complejo Centaurea alba L. (Asteraceae) en la Península Ibérica

    OpenAIRE

    Devesa, J. A.; López, E

    2011-01-01

    Taxonomic revision of the Centaurea alba L. complex (Asteraceae) in the Iberian Peninsula.- A taxonomic revision of the Centaurea alba L. complex (Centaurea L. sect. Centaurea) in the Iberian Peninsula is presented, which is represented by two species, C. alba and C. costae Willk. Three subspecies of C. alba with reasonably well-defined areas are recognized: C. alba subsp. alba, with three varieties –alba, macrocephala Pau and latronum (Pau) E. López & Devesa-, C. alba subsp. aristifera (Pau...

  15. Producción de tilapia nilótica (Oreochromis niloticus L.) utilizando hojas de chaya (Cnidoscolus chayamansa McVaugh) como sustituto parcial del alimento balanceado

    OpenAIRE

    Gaspar R Poot-López; Eucario Gasca-Leyva; Miguel A. Olvera-Novoa

    2012-01-01

    La acuicultura es una alternativa para la producción de proteína de alta calidad a bajo precio, particularmente en países en desarrollo y desabasto de alimentos. En zonas rurales, la disponibilidad de insumos alternativos es clave para mejorar la producción en el cultivo de peces, sobre todo si dichos insumos se usan en forma cruda. Una opción son las hojas de chaya (Cnidoscolus chayamansa), arbusto que crece en México, Centroamérica y Sudamérica. En este estudio se evaluó durante dos épocas ...

  16. Galbraith' s planning system as substitute for market theory El sistema planificador de Galbraith como sustituto de la teoría del mercado

    Directory of Open Access Journals (Sweden)

    Ciscel David H.

    1999-06-01

    Full Text Available This article comments on Galbrai th' s vision of the capitalist system of production which was developed in the United States beginning in the second half of the twentieth century. The major characteristic of his analysis is the loss of importance of the market and economic exchange because of the mechanisms which the large corporations created to broaden their autonomy and reduce the effects of uncertainty. The generalization of this bebev ioxe i pattern forms what Galbrai th calls a 'planning economy'. The essential aspects for understanding the process of exchange in a planning system are insti tutional control and power which depend, in turn, on effective interaction among the
    technostructure, bureaucratic symbiosis, and the revised sequence, whose meaning is explained in this paper.Este articulo comenta la vision de Galbraith acerca del sistema de produccion capitalista que se desarrollo en Estados Unidos a partir de la segunda mitad del siglo veinte. La caracteristica principal de su analisis es la perdida de importancia del mercado en el intercambio economico debida a los mecanismos que crearon las grandes corporaciones para ampliar su autonomia y reducir los efectos de la incertidumbre. La generalizacion de este patron de conportamiento conforma lo que Galbraith denomina             'economia planeada'. Los aspectos esenciales para entender el proceso de intercambio en un sistema planificador son el control y el poder institucional, que dependen, a su vez, de la interaccion efectiva entre la tecnoestructura, la simbiosis burocratica y la secuencia revisada, cuyo significado se precisa en este trabajo.

  17. Evaluación de cisticerco de taenia crassiceps como antígeno sustituto para el diagnóstico de la neurocisticercosis

    OpenAIRE

    Sonia Agudelo; Luz Elena Botero

    2004-01-01

    Para el diagnóstico de la neurocisticercosis (NCC) se requiere de extractos antigénicos obtenidos de los cisticercos de Taenia solium (T.so), lo cual presenta dificultades técnicas por la difícil consecución de cerdos naturalmente infectados (1). Sin embargo, los extractos antigénicos obtenidos de Taenia crassiceps (T.cra) muestran una alta homología con los de T.so, brindando ventajas en la producción de antígenos para implementar en técnicas serológicas (2,3). Nuestro grupo ha veni...

  18. Evaluación de cisticerco de taenia crassiceps como antígeno sustituto para el diagnóstico de la neurocisticercosis

    Directory of Open Access Journals (Sweden)

    Sonia Agudelo

    2004-02-01

    Full Text Available

    Para el diagnóstico de la neurocisticercosis (NCC se requiere de extractos antigénicos obtenidos de los cisticercos de Taenia solium (T.so, lo cual presenta dificultades técnicas por la difícil consecución de cerdos naturalmente infectados (1. Sin embargo, los extractos antigénicos obtenidos de Taenia crassiceps (T.cra muestran una alta homología con los de T.so, brindando ventajas en la producción de antígenos para implementar en técnicas serológicas (2,3. Nuestro grupo ha venido trabajando en la búsqueda de alternativas para el diagnóstico serológico de cisticercosis humana y porcina en
    Colombia y en el establecimiento de un modelo animal de fácil mantenimiento que permita la obtención de cisticercos a gran escala.

     

     

  19. 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.

  20. Salvia divinorum Epl. & Játiva-M. –Lamiaceae- ¿sustituto de la “marihuana”?

    OpenAIRE

    Alberto Angel Gurni

    2008-01-01

    El género Salvia, perteneciente a la familia de las Lamiaceae –ex Labiatae = Labiadas-, está constituido por alrededor de 500 especies distribuidas por todo el mundo. Algunas de ellas son ornamentales, tales como el “coral” (S. splendens Kerk-Gawl.), el “coral de invierno” (S. coccinea Juss.). La especie conocida como “salvia” y que se emplea como condimento es S. officinalis L., proveniente del Mediterráneo, a la que también se le atribuían propiedades medicinales. Otra especie de interés a...

  1. Empleo de factores de conversión: obtención de sulfato de magnesio a partir de magnesia alba.

    OpenAIRE

    Milla González, Miguel

    2013-01-01

    Tomando la magnesia alba como reactivo de partida, deberá obtenerse cierta cantidad de sulfato de magnesio heptahidratado. Para resolver el ejercicio es necesario encontrar el factor de conversión entre los reactivos implicados en el proceso y calcular finalmente la cantidad de producto final para un valor dado del rendimiento. Los datos son aleatorios y las expresiones de conversión se montan a modo de puzzle.

  2. RESPUESTAS FENOTÍPICAS DE Lippia alba Y Lippia origanoides (VERBENACEAE) A LA DISPONIBILIDAD DE AGUA EN EL SUELO

    OpenAIRE

    Camargo Parra Andres Alejandro; Rodriguez Lopez Nelson Facundo

    2008-01-01

    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...

  3. Sidronio Sánchez Pineda y su actuación como gobernador de Michoacán, 1922-1924

    OpenAIRE

    Luis Sánchez Amaro

    2015-01-01

    En el presente artículo se da cuenta de manera general del desempeño como gobernador sustituto de Sidronio Sánchez Pineda, si bien describe y explica cómo era el panorama político de Michoacán con la lucha decisiva, primero soterrada y luego abierta, entre el grupo del gobernador Sidronio Sánchez Pineda y el de Francisco J. Múgica. También se hace referencia a los antecedentes inmediatos de carácter político y electoral que permitieron y condicionaron el desencadenamiento de la rebelión delah...

  4. A new endornavirus species infecting Malabar spinach (Basella alba L.).

    Science.gov (United States)

    Okada, Ryo; Kiyota, Eri; Moriyama, Hiromitsu; Toshiyuki, Fukuhara; Valverde, Rodrigo A

    2014-04-01

    A putative new endornavirus was isolated from Malabar spinach (Basella alba). The viral dsRNA consisted of 14,027 nt with a single ORF that coded for a polyprotein of 4,508 aa. The genome organization was similar to that of four other endornaviruses. Conserved domains for helicase-1, capsular synthase, UDP-glucose-glycosyltransferase (UGT), and RdRp were detected. Infected plants were phenotypically undistinguishable from healthy ones. The name Basella alba endornavirus is proposed for the virus isolated from Malabar spinach. PMID:24122112

  5. ECONOMIC CRISIS IMPACT ON COUNTY ALBA HOTEL INDUSTRY

    OpenAIRE

    Claudia Olimpia MOISA

    2012-01-01

    The present paper, dominated by the global economic crisis effects is and continues to be a critical time for global tourism industry and for Romanian too. This study tries to play on a particular case, Park Hotel, located in Alba Iulia, the impact of this phenomenon over tourist hotel services.

  6. ECONOMIC CRISIS IMPACT ON COUNTY ALBA HOTEL INDUSTRY

    Directory of Open Access Journals (Sweden)

    MOISA Claudia Olimpia

    2012-12-01

    Full Text Available The present paper, dominated by the global economic crisis effects is and continues to be a critical time for global tourism industry and for Romanian too. This study tries to play on a particular case, Park Hotel, located in Alba Iulia, the impact of this phenomenon over tourist hotel services.

  7. 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. PMID:26850343

  8. Petrocaribe y ALBA-TCP: propuestas de Venezuela para una nueva integración regional y energética

    OpenAIRE

    Pardo, Eugenia Candelaria; Schaposnik, Carmen Rosa

    2015-01-01

    La crisis de 2007-2008 inició una seguidilla de acciones especulativas en diversos mercados mundiales y sectores económicos. Ello motivó a denominarla como global por su amplitud temática, su extensión e impactos a escala planetaria. En este contexto, el ALBA-TCP y Petrocaribe fueron dos respuestas que formuló Venezuela como parte de una nueva integración regional hacia América Latina y el Caribe. Por ello el trabajo propone, sobre la base de investigaciones realizadas en el Instituto de Inte...

  9. Tissue immunostaining for factor XIIIa in dermal dendrocytes of pityriasis alba skin lesions *

    OpenAIRE

    Carneiro, Francisca Regina Oliveira; do Amaral, Gabriela Borborema; Mendes, Maiana Darwich; Quaresma, Juarez Antônio Simões

    2014-01-01

    BACKGROUND Pityriasis alba affects 1% of the world population and about 9.9% of the children in Brazil. However, its etiology remains uncertain. OBJECTIVE The objective of the present study was to evaluate the immunoexpression of factor XIIIa in dermal dendrocytes of skin lesions of pityriasis alba. METHOD Twenty patients with pityriasis alba and 20 patients with atopic dermatitis underwent biopsy. The dermal dendrocytes marked by factor XIIIa were counted by means of immunohistochemical anal...

  10. Flavonoids from the flowers of Nymphaea alba L.

    Directory of Open Access Journals (Sweden)

    Jerzy Jambor

    2014-02-01

    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.

  11. A Review on Medicinal Importance of Basella alba L.

    OpenAIRE

    Roshan Adhikari; Naveen Kumar HN; Shruthi SD

    2012-01-01

    The ethanobotanical properties of Basella alba have been reviewed in this article. Various parts of the plant are used for treatment of the diseases as well as for different healing activities of human beings as well as animals across the globe especially in India and China. Its use has been discovered as asperient, rubefacient and for catarrhl infections. Some of the compounds available especially in the plant are basellasaponins, kaempherol, betalin, etc. Several extracts like aqueous, chlo...

  12. Morus alba Enhanced Functional Recovery After Sciatic Nerve Crush Injury

    Directory of Open Access Journals (Sweden)

    Supaporn Mucimapura

    2010-01-01

    Full Text Available Problem statement: Traumatic nerve injury has been recognized as one of the problems commonly found in road traffic crashes. Therefore, searching for the effective substances for promoting the functional recovery of nerve after injury is in required. Accumulating lines of evidence show that free radicals generated after injury contribute the important role to retard functional recovery, thus the substance possessing anti-oxidant could facilitate functional recovery. Based on the effect of antioxidant to promote functional recovery of nerve after injury mentioned earlier, we hypothesized that Morus alba extract, a substance possessing anti-oxidant activity, should be able to facilitate the functional recovery of peripheral nerve after injury. Approach: To elucidate this issue, male Wistar rats, weighing 180-220 g, were orally given the aqueous extract of Morus alba at various doses ranging from 0.1, 1 and 10 mg kg-1 BW 5days before and 21 days after sciatic nerve injury. Motor, sensory and sensorimotor coordination were observed every 3 days for 3 weeks by using De Medinacelli method, foot reflex withdrawal test and rotarod test, respectively. Results: The low dose of the extract significantly improved both sensory and motor functions after crush injury. Although sensory function recovers more sooner than the motor function, it fails to show full recovery within weeks. Thus, the present study demonstrates the potential of M. alba extract to enhance functional recovery after crush injury. Conclusion: In conclusion, Morus alba may serve as functional food to promote nerve recovery after injury. However, further studies about the possible active ingredient (s and underlying mechanism (s are required.

  13. Barn owl (Tyto alba) siblings vocally negotiate resources.

    OpenAIRE

    Roulin, A; Kölliker, M; Richner, H.

    2000-01-01

    Current theory proposes that nestlings beg to signal hunger level to parents honestly, or that siblings compete by escalating begging to attract the attention of parents. Although begging is assumed to be directed at parents, barn owl (Tyto alba) nestlings vocalize in the presence but also in the absence of the parents. Applying the theory of asymmetrical contests we experimentally tested three predictions of the novel hypothesis that in the absence of the parents siblings vocally settle cont...

  14. Ethnopharmacological Significance of Eclipta alba (L.) Hassk. (Asteraceae)

    OpenAIRE

    Jahan, Rownak; Al-Nahain, Abdullah; Majumder, Snehali; Rahmatullah, Mohammed

    2014-01-01

    Eclipta alba can be found growing wild in fallow lands of Bangladesh where it is considered as a weed by farmers. Traditional medicinal systems of the Indian subcontinent countries as well as tribal practitioners consider the plant to have diverse medicinal values and use it commonly for treatment of gastrointestinal disorders, respiratory tract disorders (including asthma), fever, hair loss and graying of hair, liver disorders (including jaundice), skin disorders, spleen enlargement, and cut...

  15. 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.

  16. 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.

  17. 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…

  18. 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.

  19. Fungicidal activity of Artemisia herba alba Asso (Asteraceae).

    Science.gov (United States)

    Saleh, Mahmoud A; Belal, Mohamed H; el-Baroty, Gamal

    2006-01-01

    The antifungal activity of Artemisia herba alba was found to be associated with two major volatile compounds isolated from the fresh leaves of the plant. Carvone and piperitone were isolated and identified by GC/MS, GC/IR, and NMR spectroscopy. Antifungal activity was measured against Penicillium citrinum (ATCC 10499) and Mucora rouxii (ATCC 24905). The antifungal activity (IC50) of the purified compounds was estimated to be 5 microg/ml, 2 microg/ml against Penicillium citrinum and 7 microg/ml, 1.5 microg/ml against Mucora rouxii carvone and piperitone, respectively. PMID:16484084

  20. A Review on Medicinal Importance of Basella alba L.

    Directory of Open Access Journals (Sweden)

    Roshan Adhikari

    2012-04-01

    Full Text Available The ethanobotanical properties of Basella alba have been reviewed in this article. Various parts of the plant are used for treatment of the diseases as well as for different healing activities of human beings as well as animals across the globe especially in India and China. Its use has been discovered as asperient, rubefacient and for catarrhl infections. Some of the compounds available especially in the plant are basellasaponins, kaempherol, betalin, etc. Several extracts like aqueous, chloroform, ethanol and petroleum has been used for different pharmaceutical activities.

  1. Preliminary investigation of patchaippasali mucilage (Basella alba) as tablet binder

    OpenAIRE

    Ramu, G.; G. Krishna Mohan; Jayaveera, K N

    2011-01-01

    Basella alba leaf mucilage was investigated as a binder in paracetamol tablets prepared by wet granulation method. Mucilage at four levels (concentrations of mucilage binders: 4, i.e., 2.5, 5, 7.5 and 10% w/w) were studied. No significant work has been reported to use it as a tablet binder. The evaluation of granules showed 0.62 to 0.76 mm granule size, 28°47′ to 30°27′ angle of repose and 31.57 to 23.45% fines. Moisture content of the different granulations was less than 1%. The tablets were...

  2. Preliminary investigation of patchaippasali mucilage (Basella alba as tablet binder

    Directory of Open Access Journals (Sweden)

    G Ramu

    2011-01-01

    Full Text Available Basella alba leaf mucilage was investigated as a binder in paracetamol tablets prepared by wet granulation method. Mucilage at four levels (concentrations of mucilage binders: 4, i.e., 2.5, 5, 7.5 and 10% w/w were studied. No significant work has been reported to use it as a tablet binder. The evaluation of granules showed 0.62 to 0.76 mm granule size, 28°47′ to 30°27′ angle of repose and 31.57 to 23.45% fines. Moisture content of the different granulations was less than 1%. The tablets were prepared and evaluated for average weight and weight variation, thickness, content uniformity, hardness, friability, disintegration time and in vitro dissolution profiles. All the batches of tablets exhibited good uniformity in content. The hardness was within the range of 4.5 to 5.5 kg/cm 2 . The hardness was increased and friability decreased with the increasing concentration of binding agent. The disintegration time also increased with increasing binder concentrations. The evaluation of tablet showed 0.434 to 0.410% friability, 9 to 18 minutes disintegration time and the drug release was more than 70% in 60 minutes. Tablets at 7.5% w/w binder concentration showed more optimum results as tablet binder. The B. alba mucilage was found to be good as a binder to paracetamol tablets.

  3. Tectonic histories between Alba Patera and Syria Planum, Mars

    Science.gov (United States)

    Anderson, R.C.; Dohm, J.M.; Haldemann, A.F.C.; Hare, T.M.; Baker, V.R.

    2004-01-01

    Syria Planum and Alba Patera are two of the most prominent features of magmatic-driven activity identified for the Tharsis region and perhaps for all of Mars. In this study, we have performed a Geographic Information System-based comparative investigation of their tectonic histories using published geologic map information and Mars Orbiter Laser Altimetry (MOLA) data. Our primary objective is to assess their evolutional histories by focusing on their extent of deformation in space and time through stratigraphic, paleotectonic, topographic, and geomorphologic analyses. Though there are similarities among the two prominent features, there are several distinct differences, including timing deformational extent, and tectonic intensity of formation. Whereas Alba Patera displays a major pulse of activity during the Late Hesperian/Early Amazonian, Syria Planum is a long-lived center that displays a more uniform distribution of simple graben densities ranging from the Noachian to the Amazonian, many of which occur at greater distances away from the primary center of activity. The histories of the two features presented here are representative of the complex, long-lived evolutional history of Tharsis. ?? 2004 Elsevier Inc. All rights reserved.

  4. 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.

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

    Science.gov (United States)

    Baskaran, Gunasekaran; Salvamani, Shamala; Azlan, Azrina; Ahmad, Siti Aqlima; Yeap, Swee Keong; Shukor, Mohd Yunus

    2015-01-01

    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. PMID:26697097

  6. Ectomycorrhizal fungal assemblages of Abies alba Mill. outside its native range in Poland.

    Science.gov (United States)

    Rudawska, Maria; Pietras, Marcin; Smutek, Iwona; Strzeliński, Paweł; Leski, Tomasz

    2016-01-01

    Abies alba (Mill.) is an important forest tree species, native to the mountainous regions of Europe but has been also widely introduced in the lowlands outside its native range. Like most forest tree species, A. alba forms obligate mutualisms with ectomycorrhizal (ECM) fungi. This investigation sought to examine ECM fungal communities of A. alba when the species grows 400 km north of its native range in the region of Pomerania in Poland. We surveyed for ECM fungi by sampling live roots from four mature forest stands where the A. alba component ranged from 20 to 100%. Ectomycorrhizal fungal symbionts were identified based on morphotyping and sequencing of the internal transcribed spacer (ITS) of nuclear ribosomal DNA (rDNA). Thirty-five ECM fungal taxa were distinguished on root tips of A. alba from all tested stands with 22 to 27 ECM fungal taxa in the individual stand. The diversity and similarity metrics revealed a lack of statistical differences in the structure of the ECM fungal community between stands varying in overstory tree composition. Cenococcum geophilum was the most common fungal species at all investigated A. alba stands, with an abundance of 50 to 70%. The ECM community was characterized by the lack of Abies-specific fungal symbionts and a rich and diverse suite of host-generalist mycobionts that seem to be sufficient for successful growth and development of A. alba outside of its native range. PMID:26071873

  7. Ectomycorrhizal fungal assemblages of Abies alba Mill. outside its native range in Poland

    OpenAIRE

    Rudawska, Maria; Pietras, Marcin; Smutek, Iwona; Strzeliński, Paweł; Leski, Tomasz

    2015-01-01

    Abies alba (Mill.) is an important forest tree species, native to the mountainous regions of Europe but has been also widely introduced in the lowlands outside its native range. Like most forest tree species, A. alba forms obligate mutualisms with ectomycorrhizal (ECM) fungi. This investigation sought to examine ECM fungal communities of A. alba when the species grows 400 km north of its native range in the region of Pomerania in Poland. We surveyed for ECM fungi by sampling live roots from f...

  8. Caracterização química e atividade biológica do óleo essencial de Lippia alba cultivada no Paraná

    OpenAIRE

    M. A. NOGUEIRA; Diaz, G; L. SAKUMO

    2009-01-01

    As amostras de óleo essencial de folhas frescas de Lippia alba (Mill.) N. E. Brown (Verbenaceae) coletadas nas quatro estações do ano e usadas popularmente no Brasil contra doenças estomacais, assim como antibacterianas e como anti-séptico, foram analisadas por CG/EM e avaliadas para atividade antibacteriana. Os resultados mostra...

  9. Uso de sustituto dérmico en niños con secuelas de quemaduras: Tres casos clínicos Dermis cutaneous substitute for burn sequelae: 3 case-reports

    Directory of Open Access Journals (Sweden)

    M. BEATRIZ QUEZADA K

    2009-04-01

    Full Text Available Introducción: En COANIQUEM se realizan cirugías reconstructivas de secuelas de quemaduras en forma ambulatoria, en pacientes pediátricos durante su tratamiento de rehabilitación. Una de estas cirugías es la técnica tradicional del desbridamiento más injerto dermo-epidérmico. Una nueva alternativa ha sido la aparición del sustituto dérmico Integra (Dermal Regeneration Témplate. En Chile, no existe experiencia con este sustituto dérmico aplicado en forma ambulatoria en niños con secuelas de quemaduras. Objetivo: evaluar la utilización de un sustituto dérmico en forma ambulatoria, en pacientes pediátricos con secuelas de quemadura y su evolución a dos años plazo. Casos clínicos: cirugías realizadas durante 2004 en tres pacientes de 9 a 13 años de edad, con secuelas estético-funcionales de extremidad superior. Se aplicó protocolo de evaluación de rehabilitación a 24 meses y administración de test de calidad de vida (BSHS. Resultados: No hubo complicaciones quirúrgicas en los tres pacientes; el porcentaje de prendimiento varió entre 75 y 100%. Todos requirieron presoterapia por 13 meses. La elasticidad y plegabilidad fue similar a la piel normal a los dos años de evolución, con ausencia de fibrosis y contracción del injerto. BSHS resultó favorable. Hubo presencia de infección leve en un caso. Conclusión: El sustituto dérmico Integra® es una buena alternativa de tratamiento y es posible su uso en forma ambulatoria sin mayores complicaciones quirúrgicas.Background: In COANIQUEM, burn sequelae ambulatory reconstructive surgeries in pediatric patients are performed during their rehabilitation treatments. One of these surgeries is the traditional technique of postburn contracture reléase and split-thickness skin grafting. A new alternative has been the appearance of a dermis substitute (Integra, Dermal Regeneration Témplate. There is no previous experience in Chile with this artificial skin applied in children with

  10. Selection of new clones of linalool chemotype from genetic recombination in Lippia alba Seleção de novos clones de quimiotipo linalol em Lippia alba oriundos de recombinação genética

    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.A espécie Lippia alba, aromática e medicinal, é nativa da América do Sul (Mata Atlântica e possui muito vigor e rusticidade. Por ser espécie alógama e autoincompatível, as populações naturais possuem elevada variabilidade morfológica e química. O presente trabalho teve por objetivo realizar uma triagem prévia para identificação de novos clones promissores, oriundos de uma população-base inédita (recombinante de Lippia alba quanto às características agronômicas e fitoquímicas, tendo como modelo o óleo ou quimiotipo linalol. Como controles, utilizaram-se os dois melhores clones linalol

  11. Análise do óleo essencial de folhas de três quimiotipos de Lippia alba (Mill.) N. E. Br. (Verbenaceae) cultivados em condições semelhantes

    OpenAIRE

    E.S. Tavares; L.S. Julião; Lopes, D; H.R. Bizzo; C.L.S. Lage; S.G. Leitão

    2005-01-01

    A composição do óleo essencial de Lippia alba apresenta variação quantitativa e qualitativa, levando à separação em quimiotipos. O trabalho tem como objetivo analisar o óleo essencial de folhas de três quimiotipos de Lippia alba, provenientes de diferentes regiões do Brasil, cultivados em condições semelhantes, a fim de verificar se as diferenças na composição do óleo devem-se a fatores ambientais ou a variação genética infraespecífica e se a floração influencia o rendimento e a composição do...

  12. Characterization of the error budget of Alba-NOM

    International Nuclear Information System (INIS)

    The Alba-NOM instrument is a high accuracy scanning machine capable of measuring the slope profile of long mirrors with resolution below the nanometer scale and for a wide range of curvatures. We present the characterization of different sources of errors that limit the uncertainty of the instrument. We have investigated three main contributions to the uncertainty of the measurements: errors introduced by the scanning system and the pentaprism, errors due to environmental conditions, and optical errors of the autocollimator. These sources of error have been investigated by measuring the corresponding motion errors with a high accuracy differential interferometer and by simulating their impact on the measurements by means of ray-tracing. Optical error contributions have been extracted from the analysis of redundant measurements of test surfaces. The methods and results are presented, as well as an example of application that has benefited from the achieved accuracy

  13. 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)

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

    International Nuclear Information System (INIS)

    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-β-D-glucopyranosyl-28-O-(α-L-rhamnopyranosyl-(1→3)-beta-D-xylopyranosyl -(1→4)-α-L-rhamnopyranosyl-(1→2)-α-L-arabinopyranosyl)-16α, 23-dihydroxy-olean -12-en-28-oic acid, named as Lippiasaponin I (2) and as 3-O-β-D-glucopyranosyl-28-O-(α-L-rhamnopyranosyl-(1→3)-β-D-xylopyranosyl- (1→4)-α-L-rhamnopyranosyl-(1→3)-α-Larabinopyranosyl)-16α,23-dihydroxy-olean -12-en-28-oic acid, named Lippiasaponin II (3). (author)

  15. ANTIOXIDANT, CYTOTOXIC AND ANTIMICROBIAL ACTIVITY OF SONNERATIA ALBA BARK

    Directory of Open Access Journals (Sweden)

    Md. Ali Milon*1, Md. Abdul Muhit , Durajan Goshwami , Mohammad Mehedi Masud and Bilkis Begum

    2012-07-01

    Full Text Available The present study was undertaken to evaluate antioxidant, cytotoxic and antimicrobial activity of Sonneratia alba bark. The carbon tetrachloride, chloroform soluble partitionate of methanolic extract and crude methanolic extract showed significant antioxidant property using 1,1-diphenyl-2-pecrylhydrazyl(DPPH scavenging assay ,of which chloroform partitionate and crude extract demonstrated highest activity with IC50 value of 12µg/ml and 14µg/ml respectively. In the brine shrimp lethality bioassay, LC50 values obtained from the best fit line slope were 0.812, 14.94, 0.831 and 3.288 µg/ml for standard (Vincristine sulphate, n-Hexane, carbon tetrachloride and chloroform soluble partitionate of methanolic extract respectively. The carbon tetrachloride soluble fraction revealed moderate activities against Bacillus cereus, Bacillus subtilis, Sarcina lutea, Pseudomonas aeruginosa and Shigella dysenteriae test organisms.

  16. 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.

  17. Radioactively labelled phytic acid from maturing seeds of sinapis alba

    International Nuclear Information System (INIS)

    Maturing seeds of Sinapis alba were incubated with D-[U-14C]glucose, sodium [1-14C] acetate or myo-[U14C] 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-14C]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. (orig.)

  18. 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.

  19. EFFECT OF TEMPERATURE ON THE BIOLOGY OF TUBEROLACHNUS SALIGNUS (GMELIN) (STERNORRHYNCHA: APHIDIDAE) ON (SALIX ALBA)

    OpenAIRE

    Nıhal ÖZDER; SAĞLAM, Özgür

    2008-01-01

    The development time, survivoship and reproduction of Tuberolachnus salignus (Gmelin)( Lachninae: Lachnini) were studied on Salix alba at fi ve constant temperatures (17.5°C, 20°C, 22.5°C, 25°C and 27.5°C ). The developmental time of immature stages ranged from 17.00 days at 17.5°C to 12.21 days at 25°C on Salix alba. The total percentage of survivorship of immature stages varied from 50% and 70% 17.5°C -20°C on S. alba. The largest r m valueoccurred with 0.2540 at 20°C on S. alba. The mean g...

  20. 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.

  1. The antimicrobial activities of Ethanolic extracts of Basella alba on selected microorganisms

    OpenAIRE

    Oluwafemi Adebayo Oyewole; owolabi Azeez Kalejaiye

    2012-01-01

    The antimicrobial effects of ethanolic extract of Basella alba against Staphylococcus aureus, Pseudomonas aeruginosa, Escherichia coli, and Candida albican was determined using the agar cup plate method. The phytochemical components of the ethanolic extracts of the leaf and stem of B. alba showed the presence of tannin, terpene, steroid, saponin, anthraquinone, and with carbohydrate only in the stem extracts. The result of this study showed that all the organisms except Candida albican. were ...

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

    OpenAIRE

    Gunasekaran Baskaran; Shamala Salvamani; Azrina Azlan; Siti Aqlima Ahmad; Swee Keong Yeap; Mohd Yunus Shukor

    2015-01-01

    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...

  3. THE ANTIMICROBIAL ACTIVITIES OF ETHANOLIC EXTRACTS OF BASELLA ALBA ON SELECTED MICROORGANISMS

    OpenAIRE

    Oyewole OA; Al-Khalil S; Kalejaiye OA

    2012-01-01

    Agar cup plate method was used to determine the antimicrobial effects of Basella alba against Staphylococcus aureus, Pseudomonas aeruginosa, Escherichia coli and Candida albican. Ethanolic extracts of the leaf and stem of B. alba revealed the presence of tannin, terpene, steroid, saponin, anthraquinone, and with carbohydrate present only in the stem extracts. The result of this study showed that S. aureus, P. aeruginosa and E. coli were susceptible to 60mg/ml and 100mg/ml of the extract while...

  4. ANALIZA VENITURILOR BUGETARE LA NIVELUL JUDEŢULUI ALBA ÎN PERIOADA 2006-2010

    Directory of Open Access Journals (Sweden)

    Claudia Florina Radu

    2011-01-01

    Full Text Available Analysis of the Stat Budget Incomes from Alba County during 2006-2010The study aims to examine how the main taxes collected in Alba County have evolved overthe last five years. We wish to point out also the taxes that hold the largest share of the totalrevenue collected. So, on the first place we find the income tax, than VAT is the second andcorporate income tax followes. They are therefore the main source of income for the Albacounty budget.

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

    OpenAIRE

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

    2015-01-01

    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 (...

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

    OpenAIRE

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

    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. Karyotype analysis, DNA content and molecular screening in Lippia alba (Verbenaceae)

    OpenAIRE

    Patrícia M.O. Pierre; Saulo M. Sousa; Lisete C. Davide; Marco A. Machado; Lyderson F. Viccini

    2011-01-01

    Cytogenetic analyses, of pollen viability, nuclear DNA content and RAPD markers were employed to study three chemotypes of Lippia alba (Mill.) (Verbenaceae) in order to understand the genetic variation among them. Different ploidy levels and mixoploid individuals were observed. This work comprises the first report of different chromosome numbers (cytotypes) in L. alba. The chromosome numbers of La2-carvone and La3-linalool chemotypes suggested that they are polyploids. Flow cytometric analysi...

  8. 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.

  9. RESPUESTAS FENOTÍPICAS DE Lippia alba Y Lippia origanoides (VERBENACEAE A LA DISPONIBILIDAD DE AGUA EN EL SUELO

    Directory of Open Access Journals (Sweden)

    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.

  10. Tissue immunostaining for factor XIIIa in dermal dendrocytes of pityriasis alba skin lesions*

    Science.gov (United States)

    Carneiro, Francisca Regina Oliveira; do Amaral, Gabriela Borborema; Mendes, Maiana Darwich; Quaresma, Juarez Antônio Simões

    2014-01-01

    BACKGROUND Pityriasis alba affects 1% of the world population and about 9.9% of the children in Brazil. However, its etiology remains uncertain. OBJECTIVE The objective of the present study was to evaluate the immunoexpression of factor XIIIa in dermal dendrocytes of skin lesions of pityriasis alba. METHOD Twenty patients with pityriasis alba and 20 patients with atopic dermatitis underwent biopsy. The dermal dendrocytes marked by factor XIIIa were counted by means of immunohistochemical analysis. RESULTS The mean amount of dermal dendrocytes found in the patients with pityriasis alba was 2, whereas in the patients with atopic dermatitis it was 4, with a statistically significant difference between them. A cutoff point of 3 cells/square inch was established to differentiate pityriasis alba from atopic dermatitis, with 80% sensibility and 90% specificity. CONCLUSION We believe that pityriasis alba and atopic dermatitis should be considered different clinical forms within the spectrum of atopic disease, in which sun radiation plays an important role by modulating the progression of the disease. PMID:24770500

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

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    Mauro Alves da Cunha

    2011-01-01

    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.O objetivo deste estudo foi identificar os tempos da indução e recuperação anestésica em cavalos marinhos (Hippocampus reidi expostos ao óleo essencial de Lippia alba (OE, assim como a eficácia do OE como um agente redutor de estresse no transporte desta espécie. Os cavalos marinhos foram colocados em aquários contendo 1 litro de água e diferentes concentrações de OE (0, 10, 20, 50, 150, 300 e 450 µL L-1, após a indução, os peixes foram transferidos à aquários livre de anestésico para avaliar o tempo de recuperação. Em um outro experimento os cavalos marinhos foram transportados em sacos plásticos contendo 15 µL L-1 do OE por 4 ou 24h. A concentração crescente do OE diminuiu proporcionalmente o tempo exigido

  12. Producción y valor nutricional del cultivo de morera (Morus alba L. con intercalamiento de leguminosas

    Directory of Open Access Journals (Sweden)

    María Judith Delgado

    2012-07-01

    Full Text Available Una de las principales preocupaciones en la alimentación animal es la búsqueda de alternativas rentables para el productor y eficientes desde el punto de vista nutricional para los animales. Para que el volumen de la producción de estos alimentos sea el adecuado, se han utilizado prácticas como las planteadas en la revolución verde, que incluyen el uso de fertilizantes nitrogenados químicos, lo que ha traído secuelas negativas sobre el medioambiente. En la búsqueda de nuevas alternativas nutricionales se encontraron algunos forrajes, como la morera (Morus alba L., que tiene un alto nivel de proteína, entre otras propiedades nutricionales; pero, alternativas nutricionales como ésta requieren fertilización nitrogenada en elevadas cantidades.Con el interés de generar alternativas amigables con el medioambiente y que además logren mantener o incrementar el volumen de producción y el valor nutricional de la morera, surgió la idea de estudiar la intersiembra de este arbusto con leguminosas, como arveja (Pisum sativum L., alfalfa (Medicago sativa L y fríjol (Phaseolus vulgaris L., analizando variables nutricionales y parámetros de crecimiento del cultivo de morera. Además, se trabajó con un grupo de fertilización nitrogenada y un grupo de control (sin modificación alguna del cultivo. Al finalizar el estudio se encontraron diferencias estadísticamente significativas (p<0.05 para la mayoría de parámetros, exceptuando la variable altura, que no presentó diferencias importantes (p>0.05.

  13. Monitoramento do maçarico-branco, Calidris alba (Pallas (Aves, Scolopacidae, através de recuperações de anilhas coloridas, na Coroa do Avião, Igarassu, Pernambuco, Brasil Monitoring of the sanderling, Calidris alba (Pallas (Aves, Scolopacidae, across recuperations of color band, in the Coroa do Avião, Pernambuco State, Brazil

    Directory of Open Access Journals (Sweden)

    Rachel M. de Lyra-Neves

    2004-06-01

    Full Text Available Programas de marcação de espécies migratórias vêm sendo desenvolvidos desde a década de 1980, dentre eles o PASP Pan-American Shorebirds Programs, o qual, consistia na marcação de aves migratórias neárticas com anéis e bandeirolas coloridas possibilitando formação de códigos individuais permitindo a observação das aves marcadas sem que necessitasse capturar. Esta pesquisa objetivou a recuperação de códigos do PASP de indivíduos de Calidris alba (Pallas 1764 entre os anos de 1993 a 1995 na Coroa do Avião. Essas recuperações visuais demonstraram a fidelidade de Calidris alba ao seu sítio de invernada, a Coroa do Avião. O alto percentual de recuperações de Calidris alba, bem como, as recuperações de indivíduos anilhados na Lagoa do Peixe e em algumas áreas de invernada nos Estados Unidos, demonstram a utilização da rota do Atlântico e reforça a idéia de que bandos provenientes da costa leste do Alaska migram por esta rota. A idade máxima estimada para Calidris alba durante esta pesquisa foi de 11 anos, nada se tem sobre a idade desta espécie em bibliografias específicas no estudo de Scolopacidae.Marking programs for migratory species have been developed since the 1980 decade, among them the PASP Pan-American Shorebirds Programs which consisted in the marking of nearctic migratory birds with color bands and flags, enabling the development of individual codes, allowing the observation of the marked birds without the need of capture. The purpose of this study was the recuperation of PASP codes of individuals of Calidris alba (Pallas, 1764 between 1993 and 1995 in the Coroa do Avião. These visual recuperations demonstrated the fidelity of this specie to its winter site, the Coroa do Avião. The high percentual of recuperations of Calidris alba, as well as the recuperations of marked individuals in the Lagoa do Peixe and in some wintering areas in the United States, demonstrated the use of the Atlantic route and

  14. 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.

  15. Development and validation of a rapid high performance liquid chromatography - photodiode array detection method for estimation of a bioactive compound wedelolactone in extracts of Eclipta alba

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    Satyanshu Kumar

    2013-03-01

    Full Text Available Following optimization of extraction, separation and analytical conditions, a rapid, sensitive and simple reverse-phase high performance liquid chromatography-photo diode array (HPLC-PDA method has been developed for the identification and quantification of wedelolactone in different extracts of Eclipta alba. The separation of wedelolactone was achieved on a C18 column using the solvent system consisting of a mixture of methanol: water: acetic acid (95: 5: 0.04 as a mobile phase in isocratic elution mode followed by photo diode array detection at 352 nm. The developed method was validated as per the guidelines of the International Conference on Harmonization (ICH. Calibration curve presented good linear regression (r²>0.998 within the test range and the maximum relative standard deviation (RSD, % values for intra-day assay were found to be 0.15, 1.30 and 1.1 for low (5 µg/mL, medium (20 µg/mL and high (80 µg/mL concentrations of wedelolactone. For inter-day assay the maximum RSD (% values were found to be 2.83, 1.51 and 2.06 for low, medium and high concentrations, respectively. Limit of detection (LOD and limit of quantification (LOQ were calculated to be 2 and 5 µg/mL respectively. Analytical recovery of wedelolactone was greater than 95%. Wedelolactone in different extracts of Eclipta alba was identified and quantified using the developed HPLC method. The validated HPLC method allowed precise quantitative analysis of wedelolactone in Eclipta. alba extracts.Desenvolveu-se método rápido, sensível e simples de Cromatografia Líquida de Alta Eficiência em fase reversa, utilizando-se arranjo de fotodiodo (HPLC-PDA, visando à separação, extração e às condições analíticas para a identificação e quantificação de wedelolactona em diferentes extratos de Eclipta alba. A separação de wedelolactona foi efetuada por meio de uma coluna C18, utilizando mistura de metanol:água:ácido acético (95:5:0.04 como fase móvel, em sistema de

  16. Evaluation of hepatoprotective activity of aqueous extracts of leaves of Basella alba in albino rats.

    Science.gov (United States)

    Das, Saibal; Bandyopadhyay, Sanjib; Ramasamy, Anand; Mondal, Somnath

    2015-01-01

    This study was done to evaluate possible hepatoprotective effects of aqueous leaf extracts of Basella alba in comparison with silymarin in paracetamol-induced hepatotoxicity in albino rats. Six groups of six albino rats each received orally for 6 weeks, vehicle, paracetamol (2 g/kg/day), paracetamol (2 g/kg/day) plus silymarin (50 mg/kg/day), paracetamol (2 g/kg/day) plus B. alba extract (60 mg/kg/day), paracetamol (2 g/kg/day) plus B. alba extract (80 mg/kg/day) and paracetamol (2 g/kg/day) plus B. alba extract (100 mg/kg/day). Hepatoprotective effect was evaluated by comparing serum bilirubin, serum glutamic oxaloacetic transaminase, serum glutamic pyruvic transaminase, proteins, alkaline phosphatase and liver histopathology. Results were represented as mean ± SEM. One-way ANOVA was done followed by post hoc Tukey's test with a highly significance level of P alba 100 mg/kg/day orally had significant hepatoprotective effect in paracetamol-induced hepatotoxicity in albino rats. The results were well comparable and even in some respects superior to standard drug silymarin. PMID:25347929

  17. 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.

  18. EFFECT OF TEMPERATURE ON THE BIOLOGY OF TUBEROLACHNUS SALIGNUS (GMELIN (STERNORRHYNCHA: APHIDIDAE ON (SALIX ALBA

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    Nıhal ÖZDER

    2008-07-01

    Full Text Available The development time, survivoship and reproduction of Tuberolachnus salignus (Gmelin( Lachninae: Lachnini were studied on Salix alba at fi ve constant temperatures (17.5°C, 20°C, 22.5°C, 25°C and 27.5°C . The developmental time of immature stages ranged from 17.00 days at 17.5°C to 12.21 days at 25°C on Salix alba. The total percentage of survivorship of immature stages varied from 50% and 70% 17.5°C -20°C on S. alba. The largest r m valueoccurred with 0.2540 at 20°C on S. alba. The mean generation time of the population ranged from 13.595 days at 22.5°C to 19.60 days at 17.5°C on S. alba. The optimal temperature for Tuberolachnus salignus was 20°C.

  19. Amnion s and radio-sterilized porcine skin use as potential matrices for the development of human skin substitutes; Uso de amnios y piel porcina radioesterilizados como matrices potenciales para el desarrollo de sustitutos de piel humana

    Energy Technology Data Exchange (ETDEWEB)

    Martinez P, M. E.; Reyes F, M. L.; Reboyo B, D. [ININ, Carretera Mexico-Toluca s/n, 52750 Ocoyoacac, Estado de Mexico (Mexico); Velasquillo M, M. C.; Sanchez S, R.; Brena M, A. M.; Ibarra P, J. C., E-mail: esther.martinez@inin.gob.mx [Instituto Nacional de Rehabilitacion, Calz. Mexico-Xochimilco No. 289, Col. Arenal de Guadalupe, 14389 Mexico D. F. (Mexico)

    2014-10-15

    The injuries by burns constitute a primordial problem of public health; they cause a high mortality index, severe physical and psychological disability, etc. The autologous skin transplant is the replacement therapy recommended for its treatment, but in patients that present a high percentage of burnt skin; this is not possible to carry out. Another strategy is the transplant of donated skin; however, due to the little donation that exists in our country is not very feasible to apply this treatment. A challenge of the tissues engineering is to develop biological skin substitutes, based on cells and amnion s, favoring the cutaneous regeneration and quick repair of injuries, diminishing this way the hospitalization expenses. At present skin substitutes that can equal to the same skin do not exist. On the other hand, the mesenchymal stromal cells (Msc) represent an alternative to achieve this objective; since has been demonstrated that the Msc participate in the tissue repair by means of inhibition of pro-inflammatory cytokines and differentiation to dermal fibroblasts and keratinocytes. To apply the Msc in cutaneous injuries a support material is required that to allow transplanting these cells to a lesion or burn. The radio-sterilized human amnion and the radio-sterilized porcine skin, processed by the Radio-Sterilized Tissues Bank of the Instituto Nacional de Investigaciones Nucleares (ININ), are biomaterials that are used as temporary cutaneous coverings. We suppose that these two matrices will be appropriate for the growth and maintenance in cultivation of the Msc, to generate two biological skin substitutes, in collaboration with the Biotechnology Laboratory of the Instituto Nacional de Rehabilitacion. (Author)

  20. Estimativas de parâmetros genéticos de caracteres relacionados ao vigor de estacas em Lippia alba

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    Elcio Rodrigo Rufino

    2010-12-01

    Full Text Available A espécie Lippia alba da família Verbenaceae, aromática e medicinal, é um arbusto nativo com muito vigor e variabilidade genética. O principal interesse dos estudos com esta espécie são os óleos essenciais, cujas funções têm sido comprovadas cientificamente para aplicações nas indústrias de fármacos, cosmética, perfumaria e alimentícia. Apesar desta importância potencial, inexistem pesquisas sobre estimativas de parâmetros genéticos nesta espécie como forma de subsidiar o melhoramento que até o presente momento é incipiente. Este trabalho teve como objetivo, avaliar o potencial genético de Lippia alba, estimando parâmetros genéticos inicialmente em caracteres obtidos em nível de estacas, uma vez que é a forma tradicional de multiplicação da espécie. Os caracteres avaliados foram: sobrevivência (S%, comprimento de brotos (Cb e massa de brotos (Mb. Nesses estudos iniciais de parâmetros genéticos, envolvendo vigor de estacas, formaram-se três grupos de progênies com tamanhos efetivos de 30, 23 e 7. Excetuando-se S%, obtiveram-se altas herdabilidades, no sentido restrito, para os três tamanhos efetivos, variando de 90,2% a 94,5% para Mb e 95,2 %a 97,1% para Cb. Para S%, os valores de herdabilidade foram moderados, entre 50,0% e 56,0%. Os ganhos genéticos foram semelhantes também nos três grupos de progênies formados, refletindo ampla variabilidade genética mesmo para o grupo de reduzido tamanho efetivo de progênies. As correlações genéticas aditivas foram elevadas (87,9% a 99,9%, com predomínio nas correlações fenotípicas (G% entre 94,1% a 98,8%. Apesar das correlações elevadas de ambiente a proporção destes efeitos ambientais na correlação fenotípica foi baixa (E% entre 1,2% a 5,9%.

  1. Identification and effect of two flavonoids from root bark of Morus alba against Ichthyophthirius multifiliis in grass carp

    Science.gov (United States)

    Morus alba is an important plant for sericulture and has a high medicinal value. In this study, two flavonoids (kuwanons G and O) with antiparasitic activity were isolated from the root bark of M. alba by bioassay-guided fractionation. The chemical structures were determined by pectroscopic analys...

  2. Nicaragua Re-Visited: From Neo-Liberal "Ungovernability" to the Bolivarian Alternative for the Peoples of Our America (ALBA)

    Science.gov (United States)

    Muhr, Thomas

    2008-01-01

    In this paper I conduct a historical analysis of the emergence of ALBA in Nicaragua prior to Daniel Ortega's return to the presidency and the country's official membership in the initiative from January 2007 on. I argue that ALBA is a rival structure that evolved from the contradictions inherent in hegemonic globalisation. Within the framework of…

  3. Volcanic styles at Alba Patera, Mars: Implications of lava flow morphology to the volcanic history

    Science.gov (United States)

    Schneeberger, D. M.; Pieri, D. C.

    Alba Patera presents styles of volcanism that are unique to Mars. Its very low profile, large areal extent, unusually long and voluminous lava flows, and circumferential graben make it among Mars' most interesting volcanic features. Clues to Alba's volcanic history are preserved in its morphology and stratigraphy. Understanding the relationship of lava flow morphology to emplacement processes should enable estimates of viscosity, effusion rate, and gross composition to be made. Lava flows, with dimensions considered enormous by terrestrial standards, account for a major portion of the exposed surface of Alba Patera. These flows exhibit a range of morphologies. While most previous works have focused on the planimetric characteristics, attention was drawn to the important morphological attributes, paying particular attention to what the features suggest about the emplacement process.

  4. Invitro Antioxidant and Free Radical Scavenging Activity of Aqueous and Ethanolic Flower Extract of Nymphaea Alba

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    MADHUSUDHANAN N

    2011-06-01

    Full Text Available Nymphaea alba also known as the European White Waterlily, White Lotus or Nenuphar, is an aquatic flowering plant of the family Nymphaeaceae. The flowers are white and they have many small stamens inside. It contains the active alkaloids nupharine and nymphaeine, and is a sedative and an aphrodisiac/an aphrodisiac.In this study, the antioxidant activity of aqueous and ethanolic extracts from flower of Nymphaea alba was evaluated by various antioxidant assays including total antioxidant, hydrogen peroxide scavenging and nitric oxide scavenging activities. Both extracts have exhibited significant antioxidant activity in DPPH, Nitric oxide and Hydroxyl radical induced invitro assay methods. The results indicate that both the extracts firmly possess strong antioxidant effects .Comparatively the ethanolic flower extract showed more antioxidant activity than the aqueous extracts. The results obtained from the present study indicate that the Nymphaea alba flower extract can be a potential source of natural antioxidant

  5. Estudio comparativo de la composición y actividad biológica de los aceites esenciales extraídos de Lippia alba, Lippia origanoides y Phyla dulcis, especies de la familia Verbenaceae

    OpenAIRE

    Clara Nathalia Celis; Patricia Escobar Rivero; José Hipólito Isaza; Jairo René Martínez; Elena Stashenko

    2007-01-01

    Se determinó por GC -MS la composición química de los aceites esenciales de dos quimiotipos de Lippia alba, citral y carvona; Lippia origanoides y Phyla dulcis. Se evaluó la actividad antioxidante de cada uno de los aceites, como una medida de la capacidad antirradicalaria. Adicionalmente, se evaluaron la citotoxicidad en células Vero y las actividades antifúngica, antiparasitaria y antibacterial. Los resultados obtenidos permitieron establecer que el aceite de L. origanoide...

  6. Purification and biochemical characterization of phytocystatin from Brassica alba.

    Science.gov (United States)

    Ahmed, Azaj; Shamsi, Anas; Bano, Bilqees

    2016-05-01

    Phytocystatins belong to the family of cysteine proteinases inhibitors. They are ubiquitously found in plants and carry out various significant physiological functions. These plant derived inhibitors are gaining wide consideration as potential candidate in engineering transgenic crops and in drug designing. Hence it is crucial to identify these inhibitors from various plant sources. In the present study a phytocystatin has been isolated and purified by a simple two-step procedure using ammonium sulfate saturation and gel filtration chromatography on Sephacryl S-100HR from Brassica alba seeds (yellow mustard seeds).The protein was purified to homogeneity with 60.3% yield and 180-fold of purification. The molecular mass of the mustard seed cystatin was estimated to be nearly 26,000 Da by sodium dodecyl sulfate polyacrylamide gel electrophoresis as well as by gel filtration chromatography. The stokes radius and diffusion coefficient of the mustard cystatin were found to be 23A° and 9.4 × 10(-7)  cm(2) s(-1) respectively. The isolated phytocystatin was found to be stable in the pH range of 6-8 and is thermostable up to 60 °C. Kinetic analysis revealed that the phytocystatin exhibited non-competitive type of inhibition and inhibited papain more efficiently (K(i)  = 3 × 10(-7)  M) than ficin (K(i)  = 6.6 × 10(-7)  M) and bromelain (K(i) = 7.7 × 10(-7)  M respectively). CD spectral analysis shows that it possesses 17.11% alpha helical content. PMID:26748819

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

    OpenAIRE

    UNGUREANU Mihaela

    2015-01-01

    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....

  8. Radical Scavenging Activity of the Essential Oil of Silver Fir (Abies alba)

    OpenAIRE

    Yang, Seun-Ah; Jeon, Sang-Kyung; Lee, Eun-Jung; Im, Nam-Kyung; Jhee, Kwang-Hwan; Lee, Sam-Pin; Lee, In-Seon

    2009-01-01

    The essential oil of silver fir (Abies alba) is known to help respiratory system and have easing and soothing effect for muscle. In the present study, we investigated the chemical composition, cytotoxicity and its biological activities of silver fir (Abies alba) essential oil. The composition of the oil was analyzed by GC-MS and bornyl acetate (30.31%), camphene (19.81%), 3-carene (13.85%), tricyclene (12.90%), dl-limonene (7.50%), α-pinene (2.87%), caryophyllene (2.18%), β-phellandrene (2.13...

  9. Antioxidant and neurosedative properties of polyphenols and iridoids from Lippia alba.

    Science.gov (United States)

    Hennebelle, Thierry; Sahpaz, Sevser; Gressier, Bernard; Joseph, Henry; Bailleul, François

    2008-02-01

    The neurosedative and antioxidative properties of some major compounds isolated from a citral chemotype of Lippia alba were investigated. Binding assays were performed on two CNS inhibitory targets: benzodiazepine and GABA(A) receptors. The most active compound was luteolin-7-diglucuronide, with half maximal inhibitory concentrations (IC(50)) of 101 and 40 microm, respectively. Fifteen compounds isolated from Lippia alba were tested for their radical scavenging capacities against DPPH. Four of the major compounds (verbascoside, calceolarioside E, luteolin-7-diglucuronide and theveside) were also tested for their antioxidant activity against superoxide radical-anion in cell-free (hypoxanthine-xanthine oxidase) and cellular (PMA-stimulated neutrophil granulocytes) systems. PMID:17705148

  10. Sucedáneo del café a partir de algarroba (prosopis alba griseb).

    OpenAIRE

    PROKOPIUK, DANTE BASILIO

    2008-01-01

    Prosopis alba Griseb (algarrobo blanco) es una leguminosa arbórea que crece naturalmente en el Chaco argentino. Los frutos o algarrobas son dulces y tienen un apreciable valor proteico, por ello son utilizadas en la alimentación humana y animal, principalmente secas y molidas o en forma de extractos acuosos. El objetivo de este trabajo de tesis doctoral fue desarrollar un sucedáneo de café a partir de la algarroba de Prosopis alba Griseb. Para ello, se tostaron las algarrobas a seis temperatu...

  11. Alba Nemesis Alba Nemesis

    OpenAIRE

    Irene Maria Dietschi

    2008-01-01

    The China Poems seem to be a cycle, because they comprise a period of nine years, from 1969 to 1978. Carol Berge portrays the Chinese world in the States, the shock of two cultures the encounter of East and West, of dark and bright. mysteryand clarity. East and West are painted as Siamese twins, Chang and Eng, as a unit, "connected by more than flesh." Although a unit, the twins are individuals, with an individual life. The world , here is seen as a unit, there are differences, there are...

  12. Alba Nemesis Alba Nemesis

    Directory of Open Access Journals (Sweden)

    Irene Maria Dietschi

    2008-04-01

    Full Text Available The China Poems seem to be a cycle, because they comprise a period of nine years, from 1969 to 1978. Carol Berge portrays the Chinese world in the States, the shock of two cultures the encounter of East and West, of dark and bright. mysteryand clarity. East and West are painted as Siamese twins, Chang and Eng, as a unit, "connected by more than flesh." Although a unit, the twins are individuals, with an individual life. The world , here is seen as a unit, there are differences, there are East and West, but there is also a common denominator which connects differences - halves - which can be called the human condition . The Chinese immigrants, in their condition of newcomers , suffer the process of an unavoidable adaptation, the common conflict of strangers in an extraneous homeland. "Chinese mur miming Buddhist liturgies carelessly translated from Latin versions of the same repressive history."

  13. Pollution trends using bark of morus alba in the cities of buenos aires and mendoza (Argentina Tendências de poluição usando cascas de morus alba nas cidades de buenos aires e mendoza (Argentina

    Directory of Open Access Journals (Sweden)

    Patricia Perelman

    2010-06-01

    mostraram que Al, Fe, Mg e a acumulação de outros elementos indicaram que as partículas do solo foram espalhadas pelo vento. Na área metropolitana de Buenos Aires, o Ba e o Zn apresentaram as mais altas concentrações, possivelmente por causa do intenso tráfego automotor. O trabalho atual é uma contribuição preliminar, usando-se as árvores de Morus alba como um método indireto para estimar as tendências da poluição.

  14. La Alianza Bolivariana para las Américas-Tratado de Comercio de los Pueblos (ALBA-TCP: análisis de un proyecto de integración regional latinoamericana con una fuerte dimensión altermundialista.

    Directory of Open Access Journals (Sweden)

    Francisco Javier Ullán de la Rosa

    2011-11-01

    Full Text Available El ALBA-TCP es una de las organizaciones internacionales de más reciente creación. Es, sin duda, un proyecto original, diferente a las fórmulas de integración regional conocidas y preexistentes: fuertemente dirigido desde lo político, se propone como un mecanismo para planificar desde lo público las relaciones económicas y comerciales entre países, evitando o reduciendo en lo posible la competencia de mercado y fomentando la cooperación y las sinergias desde valores socialistas y de solidaridad. Y todo esto como expresión de una encrucijada ideológica donde crecen y se mezclan, con la lógica del collage posmoderno, casi todas las corrientes del pensamiento social de izquierda. El ALBA y los gobiernos que lo integran se encuentran en medio de una confrontación geopolítica e ideológica de escala continental que sesga enormemente la objetividad de los análisis. Este artículo pretende superar dichos sesgos presentando un análisis académico riguroso y sin toma de partido alguno. En él se analizan las circunstancias históricas que envuelven el nacimiento y evolución del ALBA y se incursiona en el análisis de su programa ideológico y sus proyectos concretos, señalando su convergencia con los del movimiento altermundialista latinoamericano y mundial. Por último, se apuntan algunas estadísticas de desarrollo concretas a fin de valorar los resultados en la práctica de las políticas económicas de este bloque regional.

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

    Directory of Open Access Journals (Sweden)

    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.

  16. The antimicrobial activities of Ethanolic extracts of Basella alba on selected microorganisms

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    Oluwafemi Adebayo Oyewole

    2012-11-01

    Full Text Available The antimicrobial effects of ethanolic extract of Basella alba against Staphylococcus aureus, Pseudomonas aeruginosa, Escherichia coli, and Candida albican was determined using the agar cup plate method. The phytochemical components of the ethanolic extracts of the leaf and stem of B. alba showed the presence of tannin, terpene, steroid, saponin, anthraquinone, and with carbohydrate only in the stem extracts. The result of this study showed that all the organisms except Candida albican. were susceptible to 60mg/ml and 100mg/ml. of extract. The minimum inhibitory concentration (MIC and minimum bactericidal concentration (MBC were also determined. The result obtained showed that the MIC and MBC for the ethanolic extract of the leaf and stem of P. aeruginosa, E. coli was 50mg/ml, while the MIC and MBC of S. aureus was 100mg/ml for the ethanolic extract of the leaf and stem of B. alba. The result of this study suggests that the ethanolic extracts of B. alba could be suitable for the treatment of diseases caused by S. aureus, P. aeruginosa and E. coli.

  17. Adaptogenic effect of Morus alba on chronic footshock-induced stress in rats

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    Nade Vandana

    2009-01-01

    Full Text Available Objective : The objective of the present study was to evaluate the adaptogenic property of the ethyl acetate-soluble fraction of methanol extract of Morus alba roots against a rat model of chronic stress (CS. Materials and Methods : Rats were exposed to stress procedure for 21 days. The stress procedure was mild, unpredictable footshock, administered for 1 h once daily for 21 days. Rats were administered with the ethyl acetate soluble fraction of methanol extract of M. alba roots (25, 50 and 100 mg/kg p.o 1 h before footshock for 21 days and behavioral parameters were evaluated for cognitive dysfunction and depression using elevated plus maze and despair swim test, respectively. On day 21, rats were sacrificed immediately after stress and blood was collected for biochemical estimation. The adrenal gland and spleen were dissected for organ weight and the stomach was dissected for ulcer score. Results : CS significantly induced cognitive deficit, mental depression and hyperglycemia and increased blood corticosterone levels, gastric ulcerations and adrenal gland weight, but decreased the splenic weight. Pre-treatments with the ethyl acetate soluble fraction of methanol extract of M. alba roots (25, 50 and 100 mg/kg, p.o. significantly attenuated the CS-induced perturbations. Diazepam (1 mg/kg, p.o. was used as the standard antistress drug. Conclusion : The results indicate that M. alba possesses significant adaptogenic activity, indicating its possible clinical utility as an antistress agent.

  18. You Need Company in the Dark: Building the House of Bernarda Alba at HMP Holloway Prison

    Science.gov (United States)

    Williams, Rachel Marie-Crane

    2003-01-01

    This article is about the production of The House of Bernarda Alba in Her Majesty's Prison Holloway in London England. It is written from a personal perspective and focuses on the following topics, collaboration, a brief comparison of prison life in the US and the UK, the successful and unsuccessful experiences of participants, and their insights…

  19. Syringa oblata Lindl var. alba as a source of oleuropein and related compounds

    NARCIS (Netherlands)

    Nenadis, N.; Vervoort, J.J.M.; Boeren, J.A.; Tsimidou, M.Z.

    2007-01-01

    The leaf methanol extract of Syringa oblata Lindl var. alba was investigated as a source of oleuropein and related compounds. The extract had a high total phenol content and a radical scavenging activity similar to that of the respective extract from Olea europaea leaves. HPLC-DAD characterisation o

  20. 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.

  1. MOLA Topographic Constraints on Lava Tube Effusion Rates for Alba Patera, Mars

    Science.gov (United States)

    Riedel, S. J.; Sakimoto, S. E. H.

    2002-01-01

    Using high resolution MOLA (Mars Orbiter Laser Altimeter) topographic data to accurately model flow rates, we find that Alba Patera tube-fed flows within the mid to lower flanks could accommodate flow rates between 10 Pa s to 1.308 x 10(exp 6) Pa s. Additional information is contained in the original extended abstract.

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

    Directory of Open Access Journals (Sweden)

    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.

  3. 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. PMID:24031788

  4. Biodiesel from Meadowfoam (Limnanthes alba L.) Seed Oil: Exceptional Oxidative Stability and Unusual Fatty Acid Composition

    Science.gov (United States)

    Meadowfoam (Limnanthes alba L.) seed oil methyl esters (MFME), prepared by a standard transesterification procedure using methanol and sodium methoxide catalyst from refined meadowfoam oil (MFO), were evaluated as a potential biodiesel fuel. MFME contains the unusual 5(Z)-eicosenoate (64.2 wt %) an...

  5. Influence of outlet flow temperature at EX07 heat exchangers of ALBA synchrotron cooling system

    OpenAIRE

    Escaler Puigoriol, Francesc Xavier

    2014-01-01

    The ALBA synchrotron cooling system relies in two heat exchangers (EX07 A and B) that transfer heat from the system hot water to cold water coming from a cogeneration plant. As a result, the water temperature can be reduced to a given set point. This temperature set point is currently fixed at 21° C.

  6. TYPOLOGY OF WOODEN CHURCHES IN THE DRAINAGE BASINS OF MUREȘ AND ARIEȘ, ALBA COUNTY

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    BAIAS Ștefan

    2015-12-01

    Full Text Available The scientific undertaking, focused on a specific methodology, quantified in the specialist literature, takes shape as a quantitative, qualitative, typological and cartographic knowledge of what is authentic, traditional and representative for Alba County. The result allows us to tackle the issue of the wooden churches, considered authentic values for the inhabitant of this county.

  7. Comparación entre distintos sustitutos óseos utilizados para procedimientos de elevación de seno maxilar previo a la colocación de implantes dentales Comparison between different bone substitutes for maxillary sinus floor augmentation prior to placement of dental implants

    Directory of Open Access Journals (Sweden)

    M. Muñoz Corcuera

    2008-12-01

    Full Text Available Introducción: En la actualidad, es frecuente la rehabilitación de la zona posterior del maxilar utilizando implantes asociados a técnicas de aumento óseo, entre ellas la elevación de seno maxilar. Aunque el hueso autógeno es considerado el "gold standard" de los materiales de injerto óseo, se acompaña de morbilidad y su disponibilidad es limitada. Por ello, el objetivo de esta revisión es valorar los distintos sustitutos óseos para la elevación de seno previa a la colocación de implantes así como cuál es más efectivo. Material y métodos: Se realizó una búsqueda bibliográfica electrónica en la base de datos Cochrane y en Pubmed. Se escogieron trabajos que trataran materiales de injerto para procedimientos de elevación de seno. Resultados: Se seleccionaron trece artículos para la realización de la revisión. Para su comparación, se establecieron dos grupos, aquellos trabajos que se basaban en estudios histológicos y la valoración de la mineralización, y aquellos que evaluaban parámetros clínicos y la tasa de supervivencia de los implantes. Discusión: Teniendo en cuenta los hallazgos dispares de los distintos trabajos, no se puede considerar un material de elección sobre los demás. Sería deseable la realización de estudios a largo plazo con muestras amplias comparando distintos materiales de injerto, que evaluaran los resultados histológicos y clínicos. Conclusiones: El hueso autógeno aún es considerado el "gold standard" de los materiales de injerto para la elevación de seno maxilar, a pesar que se asocia a una elevada tasa de complicaciones. Aunque son necesarios más estudios, se han obtenidos resultados prometedores con la hidroxiapatita bovina y el ß-fosfato tricálcico.Introduction: Presently, prosthetic rehabilitation combining dental implants with bone augmentation techniques is frequently used; included amongst these is sinus floor augmentation. Despite autogenous bone being considered the gold

  8. Comparación entre distintos sustitutos óseos utilizados para procedimientos de elevación de seno maxilar previo a la colocación de implantes dentales Comparison between different bone substitutes for maxillary sinus floor augmentation prior to placement of dental implants

    OpenAIRE

    M. Muñoz Corcuera; A Trullenque Eriksson

    2008-01-01

    Introducción: En la actualidad, es frecuente la rehabilitación de la zona posterior del maxilar utilizando implantes asociados a técnicas de aumento óseo, entre ellas la elevación de seno maxilar. Aunque el hueso autógeno es considerado el "gold standard" de los materiales de injerto óseo, se acompaña de morbilidad y su disponibilidad es limitada. Por ello, el objetivo de esta revisión es valorar los distintos sustitutos óseos para la elevación de seno previa a la colocación de implantes así ...

  9. Selection of new clones of linalool chemotype from genetic recombination in Lippia alba Seleção de novos clones de quimiotipo linalol em Lippia alba oriundos de recombinação genética

    OpenAIRE

    Elcio Rodrigo Rufino; Walter José Siqueira; Márcia Ortiz Maio Marques; Carlos Augusto Colombo; Joaquim Adelino de Azevedo Filho; Antônio Lúcio Melo Martins

    2012-01-01

    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 ...

  10. 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

    OpenAIRE

    Paula Yuri Yamamoto; Carlos Augusto Colombo; Joaquim Adelino de Azevedo Filho; André Luiz Lourenção; Márcia Ortiz Mayo Marques; Guilherme Domingues da Silva Morais; Alisson Fernando Chiorato; Antônio Lúcio Mello Martins; Walter José Siqueira

    2008-01-01

    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 (c...

  11. TUBERCULOSIS COMO ENFERMEDAD OCUPACIONAL

    Science.gov (United States)

    Mendoza-Ticona, Alberto

    2014-01-01

    Existe evidencia suficiente para declarar a la tuberculosis como enfermedad ocupacional en diversos profesionales especialmente entre los trabajadores de salud. En el Perú están normados y reglamentados los derechos laborales inherentes a la tuberculosis como enfermedad ocupacional, como la cobertura por discapacidad temporal o permanente. Sin embargo, estos derechos aún no han sido suficientemente socializados. En este trabajo se presenta información sobre el riesgo de adquirir tuberculosis en el lugar de trabajo, se revisan las evidencias para declarar a la tuberculosis como enfermedad ocupacional en trabajadores de salud y se presenta la legislación peruana vigente al respecto. PMID:22858771

  12. 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. PMID:25746409

  13. Chemical composition and antiproliferative activity of essential oil from aerial parts of a medicinal herb Artemisia herba-alba

    Directory of Open Access Journals (Sweden)

    Mounir Tilaoui

    2011-08-01

    Full Text Available Artemisia herba-alba Asso., Asteraceae, is widely used in Morrocan folk medicine for the treatment of different health disorders. However, no scientific or medical studies were carried out to assess the cytotoxicity of A. herba-alba essential oil against cancer cell lines. In this study, eighteen volatile compounds were identified by GC-MS analysis of the essential oil obtained from the plant's aerial parts. The main volatile constituent in A. herba-alba was found to be a monoterpene, Verbenol, contributing to about 22% of the total volatile components. The essential oil showed significant antiproliferative activity against the acute lymphoblastic leukaemia (CEM cell line, with 3 µg/mL as IC50 value. The anticancer bioactivity of Moroccan A. herba-alba essential oil is described here for the first time.

  14. Iron Oxide Impregnated Morus alba L. Fruit Peel for Biosorption of Co(II): Biosorption Properties and Mechanism

    OpenAIRE

    Janardhan Reddy Koduru; Yoon-Young Chang; Jae-Kyu Yang; Im-Soon Kim

    2013-01-01

    Biosorption is an ecofriendly wastewater treatment technique with high efficiency and low operating cost involving simple process for the removal of heavy metal ions from aqueous solution. In the present investigation, Morus alba L. fruit peel powder (MAFP) and iron oxide impregnated Morus alba L. fruit peel powder (IO-MAFP) were prepared and used for treating Co(II) contaminated aqueous solutions. Further the materials were characterized by using FTIR and SEM-EDX analysis. From FT-IR analysi...

  15. USO DE BIOSÓLIDOS COMO REACTIVO ESPUMANTE EN PROCESOS DE FLOTACIÓN: CARACTERIZACIÓN FÍSICA Y QUÍMICA

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    LORENZO REYES-BOZO

    2011-01-01

    Full Text Available La flotación espumosa usa diversos reactivos, orgánicos e inorgánicos, para aumentar el rendimiento y selectividad del proceso. La fl otación utiliza sustancias tensoactivas que se adsorben en la interfase aire/agua. Como potenciales sustitutos de los espumantes usados actualmente, se consideran los residuos orgánicos de origen animal, como los biosólidos. Este estudio, evalúa el uso de biosólidos y ácidos húmicos como agentes espumantes para fl otación espumosa, cuantifi cándose su capacidad tensoactiva y para formar y estabilizar espumas. Biosólidos son capaces de cambiar la tensión superfi cial de una solución, crear y estabilizar espumas. Dosis menores a 4 g L-1 muestran un afecto tensoactivo mayor comparado con reactivos espumantes, tipo MIBC. Para un uso efectivo de biosólidos, se requiere realizar una etapa de preacondicionamiento, que permita separar la fracción soluble y coloidal que tiene la capacidad tensoactiva. El uso de biosólidos a gran escala necesita investigación adicional para escalar los resultados obtenidos en laboratorio.

  16. Oxidative stability of cnicken thigh meat after treatment of abies alba essential oil

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    Adriana Pavelková

    2015-12-01

    Full Text Available In the present work, the effect of the Abies alba essential oil in two different concentrations on oxidative stability of chicken thigh muscles during chilled storage was investigated. In the experiment were chickens of hybrid combination Cobb 500 after 42 days of the fattening period slaughtered.  All the broiler chickens were fed with the same feed mixtures and were kept under the same conditions. The feed mixtures were produced without any antibiotic preparations and coccidiostatics. After slaughtering was dissection obtained fresh chicken thigh with skin from left half-carcass which were divided into five groups (n = 5: C - control air-packaged group; A1 - vacuum-packaged experimental group; A2 - vacuum-packaged experimental group with ethylenediaminetetraacetic acid (EDTA solution 1.50% w/w; A3 - vacuum-packaged experimental group with Abies alba oil 0.10% v/w and A4 - vacuum-packaged experimental group with Abies alba oil 0.20% v/w. The Abies alba essential oil was applicate on ground chicken things and immediately after dipping, each sample was packaged using a vacuum packaging machine and storage in refrigerate at 4 ±0.5 °C. Thiobarbituric acid (TBA value expressed in number of malondialdehyde was measured in the process of first storage day of 1st, 4th, 8th, 12th and 16th day after slaughtering and expressed on the amount of malondialdehyde (MDA in 1 kg sample. The treatments of chicken things with Abies alba essential oil show statistically significant differences between all testing groups and control group, where higher average value of MDA measured in thigh muscle of broiler chickens was in samples of control group (0.4380 mg.kg-1 compared to experimental groups A1 (0.124 mg.kg-1, A2 (0.086 mg.kg-1, A3 (0.082 mg.kg-1 and A4 (0.077 mg.kg-1 after 16-day of chilled storage. Experiment results show that the treatment of chicken thigh with Abies alba essential oil positively influenced on the reduction of oxidative processes in thigh

  17. In vitro antifungal activities of leaf extracts of Lippia alba (Verbenaceae against clinically important yeast species

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    Graziela Teixeira de Oliveira

    2014-04-01

    Full Text Available Introduction There are few studies reporting the antifungal activities of Lippia alba extracts. Methods A broth microdilution assay was used to evaluate the antifungal effects of Lippia alba extracts against seven yeast species of Candida and Cryptococcus. The butanol fraction was investigated by gas chromatography-mass spectrometry. Results The butanol fraction showed the highest activity against Candida glabrata. The fraction also acted synergistically with itraconazole and fluconazole against C. glabrata. The dominant compounds in the butanol fraction were 2,2,5-trimethyl-3,4-hexanedione, 3,5-dimethyl-4-octanone and hexadecane. Conclusions The butanol fraction may be a good candidate in the search for new drugs from natural products with antifungal activity.

  18. Isolation and identification of (3-methoxyphenyl)acetonitrile as a phytotoxin from meadowfoam (Limnanthes alba) seedmeal.

    Science.gov (United States)

    Vaughn, S F; Boydston, R A; Mallory-Smith, C A

    1996-10-01

    Ethyl ether, ethanol, and water extracts of meadowfoam (Limnanthes alba Hartweg ex. Benth.) seedmeal were prepared and bioassayed against velvetleaf (Abutilon theophrasti Medicus) and wheat (Triticum aestivum L. "Cardinal"). Both the ethyl ether and ethanol fractions, but not the water extract, inhibited velvetleaf and wheat radicle elongation. Fractionation of the extracts indicated that (3-methoxyphenyl)acetonitrile (3-MPAN) was the active compound from both extracts, comprising >97% of the active ethanol fraction. 3-Methoxybenzyl isothiocyanate, which had been previously shown to be the major breakdown product of glucolimnanthin, the majorL. alba glucosinolate, was not detected in either extract. Radicle elongation of velvetleaf and wheat were inhibited by 3-MPAN with I50 (the concentration required to inhibit growth by 50%) values of approximately 4 × 10(-4) M (velvetleaf) and 7×10(-4) M (wheat). PMID:24227117

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

    Directory of Open Access Journals (Sweden)

    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.

  20. The ALBA spectroscopic LEEM-PEEM experimental station: layout and performance

    Science.gov (United States)

    Aballe, Lucia; Foerster, Michael; Pellegrin, Eric; Nicolas, Josep; Ferrer, Salvador

    2015-01-01

    The spectroscopic LEEM-PEEM experimental station at the CIRCE helical undulator beamline, which started user operation at the ALBA Synchrotron Light Facility in 2012, is presented. This station, based on an Elmitec LEEM III microscope with electron imaging energy analyzer, permits surfaces to be imaged with chemical, structural and magnetic sensitivity down to a lateral spatial resolution better than 20 nm with X-ray excited photoelectrons and 10 nm in LEEM and UV-PEEM modes. Rotation around the surface normal and application of electric and (weak) magnetic fields are possible in the microscope chamber. In situ surface preparation capabilities include ion sputtering, high-temperature flashing, exposure to gases, and metal evaporation with quick evaporator exchange. Results from experiments in a variety of fields and imaging modes will be presented in order to illustrate the ALBA XPEEM capabilities. PMID:25931092

  1. Derivation of uranium residual radioactive material guidelines for the former Alba Craft Laboratory site, Oxford, Ohio

    International Nuclear Information System (INIS)

    Residual radioactive material guidelines for uranium were derived for the former Alba Craft Laboratory site in Oxford, Ohio. This site has been identified for remedial action under the Formerly Utilized Sites Remedial Action Program (FUSRAP) of the US Department of Energy (DOE). Single nuclide and total uranium guidelines were derived on the basis of the requirement that the 50-year committed effective dose equivalent to a hypothetical individual who lives or works in the immediate vicinity of the former Alba Craft Laboratory site should not exceed a dose of 30 mrem/yr following remedial action for the current use and likely future use scenarios or a dose of 100 mrem/yr for less likely future use scenarios (Yu et al. 1993). The DOE residual radioactive material guideline computer code, RESRAD, which implements the methodology described in the DOE manual for implementing residual radioactive material guidelines, was used in this evaluation

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

    Directory of Open Access Journals (Sweden)

    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.

  3. 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.

  4. Exploring the metal phytoremediation potential of three Populus alba L. clones using an in vitro screening

    OpenAIRE

    S. Di Lonardo; Capuana, M.; Arnetoli, M.; R. GABBRIELLI; Gonnelli, C

    2011-01-01

    Abstract Purpose This work was planned for providing a useful screening tool for the selection of Populus alba clones suitable for phytoremediation techniques. To this aim, we investigated variation in arsenic, cadmium, copper, and zinc tolerance, accumulation and translocation in three poplar clones through an in vitro screening. Poplars have been widely proposed for phytoremediation, as they are adaptable to grow on contaminated areas and able to accumulate metals...

  5. ANTI ULCER EFFECT OF BASELLA ALBA LEAF EXTRACT IN ASPIRIN INDUCED ALBINO RATS

    OpenAIRE

    P. Venkatalakshmi et al

    2012-01-01

    The present study was designed to evaluate the anti ulcer effect of Basella alba in aspirin induced ulcerated rats. Aspirin induced ulcer was revealed by increased ulcer index, decreased gastric pH, increase in the levels of pepsin, Thio barbituric acid reactive substance (TBARS). Lipid hydroperoxides and decrease in the levels of enzymatic and non enzymatic antioxidants. Treatment with the plant extract brought back the altered parameters to normal.

  6. ANTI ULCER EFFECT OF BASELLA ALBA LEAF EXTRACT IN ASPIRIN INDUCED ALBINO RATS

    Directory of Open Access Journals (Sweden)

    P. Venkatalakshmi et al

    2012-08-01

    Full Text Available The present study was designed to evaluate the anti ulcer effect of Basella alba in aspirin induced ulcerated rats. Aspirin induced ulcer was revealed by increased ulcer index, decreased gastric pH, increase in the levels of pepsin, Thio barbituric acid reactive substance (TBARS. Lipid hydroperoxides and decrease in the levels of enzymatic and non enzymatic antioxidants. Treatment with the plant extract brought back the altered parameters to normal.

  7. Use of extract of bark of silver fir (Abies alba Mill.) for preparing of beekeeping products

    OpenAIRE

    Martinc, Nina

    2012-01-01

    The purpose of our thesis was to gain new honey analogous beekeeping product by feeding the bees with fir bark extracts (Abies alba Mill.) and to assess the suitability of the product as honey in addition to daily human consumption. In this regard, we first had to determine the appropriate concentration of the extract, by testing which concentrations would the bees prefere. After finding out an appropriate concentration, we prepared large quantities of solutions and fed...

  8. New Improvements in Magnetic Measurements Laboratory of the ALBA Synchrotron Facility

    Science.gov (United States)

    Campmany, Josep; Marcos, Jordi; Massana, Valentí

    ALBA synchrotron facility has a complete insertion devices (ID) laboratory to characterize and produce magnetic devices needed to satisfy the requirements of ALBA's user community. The laboratory is equipped with a Hall-probe bench working in on-the-fly measurement mode allowing the measurement of field maps of big magnetic structures with high accuracy, both in magnetic field magnitude and position. The whole control system of this bench is based on TANGO. The Hall probe calibration range extends between sub-Gauss to 2 Tesla with an accuracy of 100 ppm. Apart from the Hall probe bench, the ID laboratory has a flipping coil bench dedicated to measuring field integrals and a Helmholtz coil bench specially designed to characterize permanent magnet blocks. Also, a fixed stretched wire bench is used to measure field integrals of magnet sets. This device is specifically dedicated to ID construction. Finally, the laboratory is equipped with a rotating coil bench, specially designed for measuring multipolar devices used in accelerators, such as quadrupoles, sextupoles, etc. Recent improvements of the magnetic measurements laboratory of ALBA synchrotron include the design and manufacturing of very thin 3D Hall probe heads, the design and manufacturing of coil sensors for the Rotating coil bench based on multilayered PCB, and the improvement of calibration methodology in order to improve the accuracy of the measurements. ALBA magnetic measurements laboratory is open for external contracts, and has been widely used by national and international institutes such as CERN, ESRF or CIEMAT, as well as magnet manufacturing companies, such as ANTEC, TESLA and I3 M. In this paper, we will present the main features of the measurement benches as well as improvements made so far.

  9. Phenotypic plasticity of lippia alba and lippia origanoides (vervenaceae) in response to availability of light

    OpenAIRE

    Parra Torres, Edwin; Rodríguez López, Nelson

    2011-01-01

    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 treatments of light availability were set up, low (33%...

  10. Morphological and Histo-Anatomical Study of Bryonia alba L. (Cucurbitaceae)

    OpenAIRE

    Rus, Lavinia; Ielciu, Irina-Ioana; Ramona PĂLTINEAN; Vlase, Laurian; Ştefănescu, Cristina; Crişan, Gianina

    2015-01-01

    The purpose of this study consisted in the identification of the macroscopic and microscopic characters of the vegetative and reproductive organs of Bryonia alba L., by the analysis of vegetal material, both integral and as powder. Optical microscopy was used to reveal the anatomical structure of the vegetative (root, stem, tendrils, leaves) and reproductive (ovary, male flower petals) organs. Histo-anatomical details were highlighted by coloration with an original combination of rea...

  11. Morphological and Histo-Anatomical Study of Bryonia alba L. (Cucurbitaceae)

    OpenAIRE

    Lavinia M. RUS; Irina I. IELCIU; Ramona PĂLTINEAN; Vlase, Laurian; Ştefănescu, Cristina; Gianina C. CRIŞAN

    2015-01-01

    The purpose of this study consisted in the identification of the macroscopic and microscopic characters of the vegetative and reproductive organs of Bryonia alba L., by the analysis of vegetal material, both integral and as powder. Optical microscopy was used to reveal the anatomical structure of the vegetative (root, stem, tendrils, leaves) and reproductive (ovary, male flower petals) organs. Histo-anatomical details were highlighted by coloration with an original combination of reagents for...

  12. Anti-inflammatory and anti-cancer activity of mulberry (Morus alba L.) root bark

    OpenAIRE

    Eo, Hyun Ji; Park, Jae Ho; Park, Gwang Hun; Lee, Man Hyo; Lee, Jeong Rak; Koo, Jin Suk; Jeong, Jin Boo

    2014-01-01

    Background Root bark of mulberry (Morus alba L.) has been used in herbal medicine as anti-phlogistic, liver protective, kidney protective, hypotensive, diuretic, anti-cough and analgesic agent. However, the anti-cancer activity and the potential anti-cancer mechanisms of mulberry root bark have not been elucidated. We performed in vitro study to investigate whether mulberry root bark extract (MRBE) shows anti-inflammatory and anti-cancer activity. Methods In anti-inflammatory activity, NO was...

  13. Study regarding the evolution of tourist accomodation facilities - the case of Alba county, Romania

    OpenAIRE

    Silvia Maican; Malina Cordos; Carmen Pastiu; Andreea Muntean

    2014-01-01

    One of the most historical counties in Romania, Alba has a very rich and diverse touristic potential, that, until now is insufficiently exploited from the touristic point of view. Tourism in this part of Romania has seen a great growth in recent years, especially the rural tourism and ecotourism, a growth that is demonstrated by the increasing number and capacity of the tourist accommodations facilities in this area. Purpose – The major purpose of this article is to outline the evolution of t...

  14. Terpenoid Profile of Artemisia Alba is Related to Endogenous Cytokinins in Vitro

    Czech Academy of Sciences Publication Activity Database

    Krumova, S.; Motyka, Václav; Dobrev, Petre; Todorova, M.; Trendafilova, A.; Evstatieva, L.; Danova, K.

    2013-01-01

    Roč. 19, č. 2 (2013), s. 26-30. ISSN 1310-0351 R&D Projects: GA ČR(CZ) GAP506/11/0774 Institutional research plan: CEZ:AV0Z50380511 Keywords : Artemisia alba * in vitro * endogenous cytokinins Subject RIV: EF - Botanics Impact factor: 0.136, year: 2012 http://www.agrojournal.org/19/02-06s.pdf

  15. Sinalbins A and B, phytoalexins from Sinapis alba: elicitation, isolation, and synthesis.

    Science.gov (United States)

    Pedras, M S; Zaharia, I L

    2000-10-01

    The chemical structure and synthesis of sinalbin A is described. This cruciferous phytoalexin is produced by white mustard (Sinapis alba) after treatment with biotic and abiotic elicitors. In addition, a related metabolite, named sinalbin B, is present in extracts from elicited plants, but not in those from non-elicited controls. Sinalbin B, which was also synthesized, appears to be both a phytoalexin and a biosynthetic precursor of sinalbin A. PMID:11142844

  16. Oxidative stability of cnicken thigh meat after treatment of abies alba essential oil

    OpenAIRE

    Adriana Pavelková; Marek Bobko; Peter Haščík; Miroslava Kačániová; Jana Tkáčová

    2015-01-01

    In the present work, the effect of the Abies alba essential oil in two different concentrations on oxidative stability of chicken thigh muscles during chilled storage was investigated. In the experiment were chickens of hybrid combination Cobb 500 after 42 days of the fattening period slaughtered.  All the broiler chickens were fed with the same feed mixtures and were kept under the same conditions. The feed mixtures were produced without any antibiotic preparations and c...

  17. [Optimization of extraction technology from Paeoniae Radix Alba using response surface methodology].

    Science.gov (United States)

    Jin, Lin; Zhao, Wan-shun; Guo, Qiao-sheng; Zhang, Wen-sheng; Ye, Zheng-liang

    2015-08-01

    To ensure the stability of chemistry components and the convenience of operation, ultrasound method was chosen to study in this investigation. As the total common peaks area in chromatograms was set to be evaluation index, the influence on the technology caused by extraction time, ethanol concentration and liquid-to-solid ratio was studied by using single factor methodology, and the extraction technology of Paeoniae Radix Alba was optimized by using response surface methodology. The results showed that the extracting results were most affected by ethanol concentration; liquid-to-solid ratio came the second and extraction time thirdly. The optimum ultrasonic-assisted extraction conditions were as follow: the ultrasonic extraction time was 20.06 min, the ethanol concentration in solvent was 72.04%, and the liquid-to-solid ratio was 53.38 mL · g(-1), the predicted value of total common peaks area was 2.1608 x 10(8). Under the extraction conditions after optimization, the total common peaks area was 2.1422 x 10(8), and the relative deviation between the measured and predicted value was 0.86%, so the optimized extraction technology for Paeoniae Radix Alba is suitable and feasible. Besides, for the purpose of extracting more sufficiently and completely, the optimized extraction technology had more advantages than the extraction method recorded in the monogragh of Paeoniae Radix Alba in Chinese Pharmacopoeia, which will come true the assessment and utilization comprehensively. PMID:26677698

  18. THE ANTIMICROBIAL ACTIVITIES OF ETHANOLIC EXTRACTS OF BASELLA ALBA ON SELECTED MICROORGANISMS

    Directory of Open Access Journals (Sweden)

    Oyewole OA

    2012-12-01

    Full Text Available Agar cup plate method was used to determine the antimicrobial effects of Basella alba against Staphylococcus aureus, Pseudomonas aeruginosa, Escherichia coli and Candida albican. Ethanolic extracts of the leaf and stem of B. alba revealed the presence of tannin, terpene, steroid, saponin, anthraquinone, and with carbohydrate present only in the stem extracts. The result of this study showed that S. aureus, P. aeruginosa and E. coli were susceptible to 60mg/ml and 100mg/ml of the extract while Candida albican was resistant. The minimum inhibitory concentration (MIC and minimum bactericidal concentration (MBC for the ethanolic extract of the leaf and stem were also determined. The MIC and the MBC for the leaf and stem extract of P. aeruginosa and E. coli was 50mg/ml while the MIC and the MBC for the leaf and stem extract of S. aureus was 100mg/ml. The result of this study suggests that the ethanolic extracts of B. alba was not suitable for the treatment of disease caused by Candida albican but could be suitable for the treatment of diseases caused by S. aureus, P. aeruginosa and E. coli.

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

    Directory of Open Access Journals (Sweden)

    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.

  20. 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. PMID:27115720

  1. 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. PMID:27132827

  2. The ALBA spectroscopic LEEM-PEEM experimental station: layout and performance

    International Nuclear Information System (INIS)

    The performance of the spectroscopic LEEM-PEEM experimental station at the ALBA Synchrotron is presented: XPEEM lateral resolution down to better than 20 nm, electron energy resolution below 0.15 eV, and excellent long-term stability. The spectroscopic LEEM-PEEM experimental station at the CIRCE helical undulator beamline, which started user operation at the ALBA Synchrotron Light Facility in 2012, is presented. This station, based on an Elmitec LEEM III microscope with electron imaging energy analyzer, permits surfaces to be imaged with chemical, structural and magnetic sensitivity down to a lateral spatial resolution better than 20 nm with X-ray excited photoelectrons and 10 nm in LEEM and UV-PEEM modes. Rotation around the surface normal and application of electric and (weak) magnetic fields are possible in the microscope chamber. In situ surface preparation capabilities include ion sputtering, high-temperature flashing, exposure to gases, and metal evaporation with quick evaporator exchange. Results from experiments in a variety of fields and imaging modes will be presented in order to illustrate the ALBA XPEEM capabilities

  3. The ALBA spectroscopic LEEM-PEEM experimental station: layout and performance

    Energy Technology Data Exchange (ETDEWEB)

    Aballe, Lucia, E-mail: laballe@cells.es; Foerster, Michael; Pellegrin, Eric; Nicolas, Josep; Ferrer, Salvador [ALBA Synchrotron Light Facility, Carretera BP 1413, Km. 3.3, Cerdanyola del Vallès, Barcelona 08290 (Spain)

    2015-04-09

    The performance of the spectroscopic LEEM-PEEM experimental station at the ALBA Synchrotron is presented: XPEEM lateral resolution down to better than 20 nm, electron energy resolution below 0.15 eV, and excellent long-term stability. The spectroscopic LEEM-PEEM experimental station at the CIRCE helical undulator beamline, which started user operation at the ALBA Synchrotron Light Facility in 2012, is presented. This station, based on an Elmitec LEEM III microscope with electron imaging energy analyzer, permits surfaces to be imaged with chemical, structural and magnetic sensitivity down to a lateral spatial resolution better than 20 nm with X-ray excited photoelectrons and 10 nm in LEEM and UV-PEEM modes. Rotation around the surface normal and application of electric and (weak) magnetic fields are possible in the microscope chamber. In situ surface preparation capabilities include ion sputtering, high-temperature flashing, exposure to gases, and metal evaporation with quick evaporator exchange. Results from experiments in a variety of fields and imaging modes will be presented in order to illustrate the ALBA XPEEM capabilities.

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

    Directory of Open Access Journals (Sweden)

    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.

  5. Nectar resorption in flowers of Sinapis alba L., Brassicaceae and Platanthera chlorantha Custer (Rchb.), Orchidaceae

    International Nuclear Information System (INIS)

    Full text: In the flowers of Sinapis alba nectar is secreted by two pairs of nectaries and accumulated as drops between filaments and in the cavity of sepals whereas in Platanthera chlorantha nectar is produced and accumulated within a spur. Previous studies of these species revealed that after a period of secretion and cessation, rapid nectar resorption occurs. The aim of this study was the observation of nectar resorption by the nectaries using radiolabelled sucrose. During the peak of secretion the nectar accumulated in unpollinated flowers was replaced with the same volume of labelled sucrose and after 12-48 hrs of incubation, at the resorption phase, parts of S. alba flowers with nectaries as well as fragments of P. chlorantha spur were sampled and fixed for microautoradiographic studies. In S. alba the presence of [14C(U)] sucrose was detected at the base of nectaries, in phloem elements of main vascular strands supplying glands, whereas both epidermis and nectary parenchyma showed no traces of radiolabelled sugars. In P. chlorantha the presence of labelled sucrose was stated mainly in the walls of nectary cells, which indicate an apoplastic route of reabsorbed nectar. (author)

  6. 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.

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

    Directory of Open Access Journals (Sweden)

    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.

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

    Directory of Open Access Journals (Sweden)

    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.

  9. Análise do óleo essencial de folhas de três quimiotipos de Lippia alba (Mill. N. E. Br. (Verbenaceae cultivados em condições semelhantes

    Directory of Open Access Journals (Sweden)

    E.S. Tavares

    2005-03-01

    Full Text Available A composição do óleo essencial de Lippia alba apresenta variação quantitativa e qualitativa, levando à separação em quimiotipos. O trabalho tem como objetivo analisar o óleo essencial de folhas de três quimiotipos de Lippia alba, provenientes de diferentes regiões do Brasil, cultivados em condições semelhantes, a fim de verificar se as diferenças na composição do óleo devem-se a fatores ambientais ou a variação genética infraespecífica e se a floração influencia o rendimento e a composição do óleo. Os quimiotipos produtores de citral, carvona e linalol, foram denominados Lippia alba 1, 2 e 3, respectivamente. Os óleos essenciais foram extraídos por hidrodestilação de folhas e analisados por cromatografia com fase gasosa e cromatografia com fase gasosa acoplada ao espectrômetro de massas. O melhor rendimento foi obtido das plantas no estágio vegetativo. A composição do óleo essencial manteve-se inalterada para os três quimiotipos após cultivo em condições semelhantes e também não variou qualitativamente durante o crescimento vegetativo e floração. Os dados obtidos reforçam a idéia que as diferenças na composição do óleo essencial dos quimiotipos refletem variações genotípicas entre as plantas e que a extração de óleo essencial de L. alba deve ser efetuada na fase de crescimento vegetativo, quando é maior o rendimento do óleo e a porcentagem dos componentes majoritários.

  10. The influence of phosphorus nutritional status on the uptake of germanium in Panicum miliaceum and Brassica alba

    Science.gov (United States)

    Kaden, Ute Susanne; Székely, Balázs; Wiche, Oliver

    2015-04-01

    In order to investigate the influence of the phosphorus nutritional status on the uptake of germanium (Ge) in biomass two species, white millet (Panicum miliaceum) and white mustard (Brassica alba) were grown and sampled in a greenhouse experiment. The cultivation took place on two different substrates. The plants were fertilized with different nutrient solutions which differed in their phosphate content, and artificial addition of Ge was held via the casting solution. During the test period, measurements of the pH value, electric conductivity, and phosphate content of the soil solution were conducted. To transfer germanium from soil and plant material in solution, melting and microwave digestion processes were done. The experiment showed that in both species the additional Ge supply also leads to an increasing germanium content in the aboveground plant material. The two species, however, behave differently in response to this Ge supply. Panicum miliaceum accumulates Ge in the above-ground parts of plants stem, leaf and fruit to a much greater extent than Brassica alba. On the other hand the Ge accumulation in the roots of both B. alba and P. miliaceum was very high. In case of B. alba the root content was found by far higher as compared to the other parts of the plant. The addition of phosphate in the system changes the behavior. Without additional Ge its natural uptake from soil decreases in both species but in B. alba it is more characteristic. Increasing Ge supply (for both species) leads to an increased Ge uptake, until it reaches a maximum, regardless of the presence of phosphate addition. Phosphate, on the other hand, has positive effects on Ge uptake only in the case of B. alba roots, and to a limited extent in roots of P. miliaceum. In addition, for Panicum miliaceum an increase of germanium mainly in the underground parts was achieved. A further addition of phosphate did not have a positive effect on a greater enrichment of germanium. Whereas in Brassica

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

    Directory of Open Access Journals (Sweden)

    Joseânia Salbego

    2014-12-01

    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.

  12. Characterization of Melanogenesis Inhibitory Constituents of Morus alba Leaves and Optimization of Extraction Conditions Using Response Surface Methodology

    Directory of Open Access Journals (Sweden)

    Ji Yeon Jeong

    2015-05-01

    Full Text Available Melanin is a natural pigment that plays an important role in the protection of skin, however, hyperpigmentation cause by excessive levels of melatonin is associated with several problems. Therefore, melanogenesis inhibitory natural products have been developed by the cosmetic industry as skin medications. The leaves of Morus alba (Moraceae have been reported to inhibit melanogenesis, therefore, characterization of the melanogenesis inhibitory constituents of M. alba leaves was attempted in this study. Twenty compounds including eight benzofurans, 10 flavonoids, one stilbenoid and one chalcone were isolated from M. alba leaves and these phenolic constituents were shown to significantly inhibit tyrosinase activity and melanin content in B6F10 melanoma cells. To maximize the melanogenesis inhibitory activity and active phenolic contents, optimized M. alba leave extraction conditions were predicted using response surface methodology as a methanol concentration of 85.2%; an extraction temperature of 53.2 °C and an extraction time of 2 h. The tyrosinase inhibition and total phenolic content under optimal conditions were found to be 74.8% inhibition and 24.8 μg GAE/mg extract, which were well-matched with the predicted values of 75.0% inhibition and 23.8 μg GAE/mg extract. These results shall provide useful information about melanogenesis inhibitory constituents and optimized extracts from M. alba leaves as cosmetic therapeutics to reduce skin hyperpigmentation.

  13. 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.

  14. 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.

  15. El Blog como consuelo

    OpenAIRE

    Blanco Rodríguez, Fernando del

    2016-01-01

    El Blog Kemixon Reporter 2.0 nació hace ya más de un año como una invitación de la Biblioteca CID a la mezcla y a la curiosidad: la idea era, por una parte, ser útiles para el trabajo de nuestros usuarios, ofreciéndoles instrumentos tanto de investigación como de análisis y, por otra, ser útiles para poner cara, color, discurso, poesía, imagen, desorden… y, en último caso, sentido, a todos los alrededores de las ciencias experimentales que estos usuarios practican.

  16. Internet como herramienta educativa

    OpenAIRE

    Chiarani, Marcela Cristina; Lucero, María Margarita; Pianucci, Irma Guadalupe; Manzur, Lilian

    2001-01-01

    El presente trabajo hace referencia a la formación docente y las posibilidades educativas que ofrece Internet, tales como buscar información, comunicarse con otras instituciones y elaborar su propio material educativo para trabajar con sus alumnos. Pretende a su vez acentuar la vertiente productora en los centros Educativos sin dejar de lado la más difundida, como es la vertiente consumidora en el uso de Internet en la educación. Se trata de una experiencia llevada a cabo por el Centro ...

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

    Directory of Open Access Journals (Sweden)

    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

  18. La imagen como dato

    OpenAIRE

    Rebollo Delgado, Lucrecio

    2009-01-01

    I. INTRODUCCIÓN. II. LA IMAGEN Y EL CONCEPTO DE UNO MISMO. III. EL DERECHO A LA PROPIA IMAGEN EN EL ORDENAMIENTO JURÍDICO ESPAÑOL. IV. LA TEMPORAL EXCLUSIÓN DE LA VIDEOVIGILANCIA. V. LA IMAGEN COMO DATO.

  19. 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

  20. 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

  1. Karyotype analysis, DNA content and molecular screening in Lippia alba (Verbenaceae

    Directory of Open Access Journals (Sweden)

    Patrícia M.O. Pierre

    2011-09-01

    Full Text Available Cytogenetic analyses, of pollen viability, nuclear DNA content and RAPD markers were employed to study three chemotypes of Lippia alba (Mill. (Verbenaceae in order to understand the genetic variation among them. Different ploidy levels and mixoploid individuals were observed. This work comprises the first report of different chromosome numbers (cytotypes in L. alba. The chromosome numbers of La2-carvone and La3-linalool chemotypes suggested that they are polyploids. Flow cytometric analysis showed an increase of nuclear DNA content that was not directly proportional to ploidy level variation. A cluster analysis based on RAPD markers revealed that La3-linalool shares genetic markers with La1-citral and La2-carvone. The analysis showed that the majority of genetic variation of La3-linalool could be a consequence of ixoploidy. ur data indicates that sexual reproduction aong those three chemotypes is unlikely and suggests the beginning of reproductive isolation. The results demonstrated that chromosome analysis, nuclear DNA content estimation and RAPD markers constitute excellent tools for detecting genetic variation among L. alba chemotypes.Análises citogenéticas, de viabilidade do pólen, do conteúdo de DNA nuclear e marcadores RAPD foram empregadas no estudo de três quimiotipos de Lippia alba (Mill. (Verbenaceae visando contribuir para o entendimento da variação genética entre os mesmos. Diferentes níveis de ploidia e indivíduos mixoploides foram observados. Este trabalho compreende o primeiro relato de diferentes números cromossômicos (citótipos em L. alba. Os números cromossômicos dos quimiotipos La2-carvona e La3-linalol sugere que eles seja poliploides. A análise da citometria de fluxo mostrou um aumento do conteúdo de DNA nuclear que não foi diretamente proporcional à variação no nível de ploidia. A análise de agrupamento baseada nos marcadores RAPD demonstrou que La3-linalol compartilha marcadores genéticos com La1

  2. Structural identification and bioactivities of red-violet pigments present in Basella alba fruits.

    Science.gov (United States)

    Lin, Shu-Mei; Lin, Bo-Hong; Hsieh, Wan-Mei; Ko, Huey-Jiun; Liu, Chi-Dong; Chen, Lih-Geeng; Chiou, Robin Y-Y

    2010-10-13

    Mature Basella alba L. fruit, with dark blue skin and deep red-violet flesh, is a potential source of natural colorants. Its pigment components and bioactivities deserve particular attention and investigation. In this study, fruit flesh was extracted with 80% methanol (containing 0.2% formic acid) and subjected to solid-phase extraction, semipreparative HPLC isolation, mass spectrophotometric analysis, and structural elucidation. The major red pigment was identified as gomphrenin I. Its quantity increased with the increase of fruit maturity. The gomphrenin I extract yield from ripe fruits was 36.1 mg/100 g of fresh weight. In addition to gomphrenin I, betanidin-dihexose and isobetanidin-dihexose were also detected. The antioxidant activities of gomphrenin I determined by Trolox equivalent antioxidant capacity (TEAC), α,α-diphenyl-β-picrylhydrazyl (DPPH) radical scavenging activity, reducing power, and antioxidative capacity assays were equivalent to 534 μM Trolox, 103 μM butylated hydroxytoluene (BHT), 129 μM ascorbic acid, and 68 μM BHT at 180, 23, 45, and 181 μM, respectively. The anti-inflammatory function was tested at concentrations of 25, 50, and 100 μM in murine macrophages stimulated with lipopolysaccharide (LPS). The results revealed that gomphrenin I suppressed LPS-induced nitric oxide (NO) production in a dose-dependent manner and decreased PGE(2) and IL-1β secretions at the highest concentration tested. The transcriptional inhibitory activities of gomphrenin I on the expression of inflammatory genes encoding iNOS, COX-2, IL-1β, TNF-α, and IL-6 were also observed. It is of merit to identify gomphrenin I as a principal pigment of B. alba fruits and as a potent antioxidant and inflammatory inhibitor. These findings suggest that B. alba fruit is a rich source of betalains and has value-added potential for use in the development of food colorants and nutraceuticals. PMID:20839771

  3. 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

  4. On the phase characterization of the residues of the plant Comandante Pedro Soto Alba

    International Nuclear Information System (INIS)

    It has been studied of the phases present in the solid industrial residues of the plant Comandante Pedro Soto Alba (Moas's tails). It is done a preliminary qualitative characterization by X ray diffraction. It is done a characterization by differential and gravimetric thermal analysis and a quantitative valuation of SO3 and H2O present in the samples. A complex of S and Al is detected. The results of SO3 are compared with those obtained by the gravimetric method to verify those of Al, an elemental analysis by neutron activation was solicitated. A formula for the complex of S and Al is proposed. (author)

  5. Effects of the Methanol Extract of Basella alba L (Basellaceae) on Steroid Production in Leydig Cells

    OpenAIRE

    Carine Travert; Faustin-Pascal T. Manfo; Serge Carreau; Paul Fewou Moundipa; Monsees, Thomas K.; Edouard Akono Nantia

    2011-01-01

    In this study, Leydig cells were purified from 70 day-old Sprague Dawley male rats and incubated with 10 and 100 µg/mL of methanol extract of Basella alba (MEBa) for 4 hours followed by the evaluation of cell viability, steroid (testosterone and estradiol) production, and the level of aromatase mRNA. Results showed that MEBa did not affect Leydig cell viability. At the concentration of 10 µg/mL, MEBa significantly stimulated testosterone and estradiol production (p < 0.01 and p < 0.03, ...

  6. Enhancing Dry Season Production of Indian Spinach (Basella alba) through Fertigation

    OpenAIRE

    AYENI, L.S.; Adedeji, O A; Okubena-Dipeolu, E. A.

    2013-01-01

    Optimum and qualitative production of vegetables in the depleted soils during the dry season are best achieved through irrigation. Two experiments were concurrently conducted in 2010 to determine the effect of irrigated poultry manure on the vegetative growth and nutritional quality of Indian Spinach (Basella alba) in South Western Nigeria. Poultry manure (P) rates at 0 (P0+W), 5 (P1+W), 10 (P2+W), 15 (P3+W) and 20 t ha-1 (P4+W) were each irrigated with 6,000 litres of water per hectare (W) a...

  7. Transferability and characterization of nine microsatellite markers for the tropical tree species Tabebuia roseo-alba.

    Science.gov (United States)

    Feres, Juliana Massimino; Martinez, Marcelo L L; Martinez, Carlos A; Mestriner, Moacyr A; Alzate-Marin, Ana Lilia

    2009-01-01

    Microsatellite loci that were previously developed in the tropical tree Tabebuia aurea were used for the genetic analysis of Tabebuia roseo-alba populations. Nine of 10 simple sequence repeat markers were amplified, and the polymorphism was assessed in 58 individuals sampled from two stands in southeastern Brazil. All loci were polymorphic with Mendelian inheritance. The allele numbers were high, ranging from 5 to 13 in population I and 3 to 7 in population II, with means of 8.9 and 5.5, respectively. We conclude that these markers can be efficiently used for parentage and gene-flow studies. PMID:21564672

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

    Directory of Open Access Journals (Sweden)

    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.

  9. Optimization of the soft x-ray transmission microscopy beamline at the ALBA light source

    Science.gov (United States)

    Sorrentino, Andrea; Pereiro, Eva; Valcárcel, Ricardo; Ferrer, Salvador; Nicolas, Josep

    2013-09-01

    Mistral is the soft X-ray full field microscopy beamline at the ALBA light source. The beamline is designed to have large source acceptance and to provide constant magnification at the exit slit for photon energies between 270 and 2600 eV. The monochromator is a variation of the Petersen plane grating monochromator in which a variable line spacing grating is used to maintain the beam focused at the exit slit, independently of the fixed focus constant, and to cancel aberrations. We present the alignment strategy used to compensate errors of the optical elements, and report about the commissioning results.

  10. Brutbiologie und Wanderungen einer Schleiereulenpopulation (Tyto alba) im hessischen Main-Kinzig-Kreis

    OpenAIRE

    Jahnel, Mathias

    2005-01-01

    Die Schleiereule (Tyto alba) ist eine in fast allen Regionen der Erde vorkommende Eulenart. In Mitteleuropa erreicht sie die nördlichste Grenze ihres Verbreitungsgebiets. Man trifft sie hier in tiefergelegenen, waldarmen Gegenden an. Eine Arbeitsgruppe der Hessischen Gesellschaft für Ornithologie und Naturschutz (HGON) und des Deutschen Bund für Vogelschutz (DBV) führt im hessischen Main-Kinzig-Kreis seit 1976 Maßnahmen zum Schutz der Schleiereulen durch. Dazu gehören das Anbringen von Brutki...

  11. Estudio de la satisfacción y motivación de los albañiles

    OpenAIRE

    CABANES RUBIRA, IGNACIO

    2011-01-01

    Trabajo científico técnico. Se pretende justificar el interés e importancia que tiene la motivación y satisfacción laboral en el sector de la construcción, más concretamente en el gremio de los albañiles. Con este proyecto de investigación se pretenden conocer de primera mano las experiencias y vivencias de los albañiles de la construcción en su trabajo

  12. A regulatory approach on low temperature induced enzymatic and anti oxidative status in leaf of Pui vegetable (Basella alba)

    OpenAIRE

    Shahidul Haque, Md.; Monirul Islam, Md.; Abdur Rakib, Md.; Asraful Haque, Md.

    2013-01-01

    Basella alba is a soft green vegetable, survives in adverse environmental circumstances, for example, very cold temperature although the mechanism and the temperature sensitivity in this species are not clarified. Pot experiment for cultivation of B. alba was carried out to examine the effects of low temperature on the synthesis of two enzymes, polyphenol oxidase (PPO) and peroxidase (POD) in leaf of this plant. They were exposed to 8 °C for 24 h, 48 h and 72 h periods and the respective cont...

  13. 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.

  14. On the Occurence in Romania of Potentillo albae-Quercetum petraeae Libbert 1933 Association

    Directory of Open Access Journals (Sweden)

    Adrian INDREICA

    2011-05-01

    Full Text Available The paper presents a plant community of dry-mesic oak forests that is new to Romania, Potentillo albae-Quercetum petraeae Libbert 1933. This association belongs to Quercion petraeae alliance and its range extends over the subcontinental area of Central Europe. A multivariate analysis (cluster analysis, non-metric multidimensional scaling ordination of a large phytosociological database was used to identify diagnostic species, interspecific associations and the gradient of species composition. Based on species composition and site parameters, a group of relevees in oak forests that correspond to the diagnosis of Potentillo-Quercetum was identified. The Romanian relevees corresponding to this association were previously assigned, pro parte, to Carici montanae-Quercetum Gergely 1962 and Quercetum robori-petraeae Borza 1959. The relations with these and other potentially related two associations, Genisto tinctoriae-Quercetum petraeae Klika 1932 and Quercetum petraeae-cerris So� 1963, are discussed. The vegetation and site conditions of the Potentillo albae-Quercetum association in Romania are illustrated in a phytosociological table with 25 relevees and a distribution map is provided.

  15. Nuclear techniques used in study of biological processes in Sinapis alba culture

    International Nuclear Information System (INIS)

    The aim of the present paper is to study different nuclear techniques, in particular the influence of gamma radiation upon germination, growth and respiration processes in Sinapis alba culture. The dependence of these phenomena on dose of gamma irradiation was studied. Research was done on dry seeds of mustard (Sinapis alba).The doses of gamma irradiation were: 20 krad, 40 krad, 60 krad, 80 krad and 100 krad.The subsequent evolution of the irradiated samples was compared with the evolution of an unirradiated (control) samples. The irradiation was done evenly, in a single phase. The treatment of the dry seeds of mustard with gamma radiation determined a diminution of energy of germination. So, the energy of germination was 57 - 73% in gamma treated batches and 81% in the control batch. Thus, the faculty of germination decreases from 92% (in the control batch) to 83% in the irradiated batches. Growth process (length of roots and hypocotyl) was also studied. For 100 krad gamma irradiation the rate of this process was lower than that of the control batch, both in the first and the four day of irradiation. The inhibition effect manifested on germination and growth processes for gamma treated dry seeds of mustard is determined by the modification in the membrane permeability. The intensity of respiration process in the irradiated lots was lower than that of the control lot. The inhibition effect manifested by respiration process following gamma irradiation could be explained by the enzymatic activity of mustard seeds. (authors)

  16. 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.

  17. The design of the Alba control system: a cost-effective distributed hardware and software architecture

    International Nuclear Information System (INIS)

    Alba is a third generation synchrotron located in Spain. The control system of Alba is highly distributed. The hardware infrastructure for the control system includes in the order of 350 racks, 17000 cables and 6300 equipment. More than 150 disk-less industrial computers, distributed in the service area and 30 multi-core servers in the data center, manage several thousands of process variables. In this environment, the software client server model, with fast and reliable communications, was imposed. Tango plays an important role. It is a big success story of the Tango Collaboration, where a complete middle-ware schema is available 'off the shelf'. Moreover, Tango has been effectively complemented with Sardana SCADAs (Supervision Control And Data Acquisition), a great development effort shared and used in several other institutes. The whole installation has been coordinated from the beginning with a complete cabling and equipment database, where all the equipment, cables, connectors are described and inventoried. The cabling database, or ccdb can be considered as the core of the installation since it soon turned out into a central repository for the whole installation. This paper explains the design and the architecture of the control system, describes the tools and justifies the choices made. Finally, it presents and analyzes the figures regarding cost and performances. (authors)

  18. 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

  19. 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.; Kjær, C.; Stenersen, J.

    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...

  20. Diversity of Sonneratia alba in coastal area of Central Java based on isozymic patterns of esterase and peroxidase

    Directory of Open Access Journals (Sweden)

    AHMAD DWI SETYAWAN

    2009-07-01

    Full Text Available Setyawan AD. 2009. Diversity of Sonneratia alba in coastal area of Central Java based on isozymic patterns of esterase and peroxidase. Nusantara Bioscience 1: 92-103. The study was intended to observe the diversity and the relationship of Sonneratia alba in southern and northern coast of Central Java Province based on isozymic patterns of esterase and peroxidase. This research was conducted in July until December 2003, at six sites, i.e. Wulan (WUL, Juwana (JUW, Pasar Bangi (PAS, in the northern coast, and Bogowonto (BOG, Motean (MOT, and Muara Dua (MUA in the southern coast. The laboratory assay was conducted in Central Laboratory of Mathematics and Natural Sciences, Sebelas Maret University (UNS Surakarta. The seedling plant samples that were collected from enam mangrove habitats transplanted in green house in the laboratory. There were 20 individual samples each sites. The result indicated that the individual of S. alba of the same or near location has the same genetic diversity in common, because the genetic exchange on a same population was higher than on a different population. Therefore, the populations of S. alba from northern coast had higher similarity each others than southern coast one, on the other way the populations from southern coast had higher similarity each others than northern coast one.

  1. Gas chromatograph analysis on closed air and nitrogen oxide storage atmospheres of recalcitrant seeds of Quercus Alba

    Science.gov (United States)

    Storage of recalcitrant seeds remains an unsolved problem. This study investigated the quantitative gas analysis of nitrous oxide (N2O) and air atmospheres on the recalcitrant seeds of Quercus alba by using gas chromatograph. Ten seeds were placed in each sealed atmospheric system of air and 98/2% N...

  2. El mundo como proyecto

    OpenAIRE

    Sbarra, Alberto; Morano, Horacio; Cueto Rúa, Verónica

    2015-01-01

    Un profesor decía a sus alumnos: “…ahora ustedes comenzarán a mirar el mundo con ojos de arquitecto”1, recreando una visión totalizadora e integradora que incluye el pensamiento proyectual. Instalados en un determinado campo disciplinar, se tiene una nueva noción de la realidad, probablemente una nueva manera de mirar el mundo. Imaginar el mundo como proyecto2, lo hemos convertido en un desafío para la asignatura Teoría, en la creencia que el mundo es un proyecto inacabado, en donde la Arq...

  3. El otro como adversario

    OpenAIRE

    Cieza Rodríguez, María Fernanda

    2007-01-01

    Este trabajo implica comenzar a preguntarnos sobre las causas, las características, las motivaciones subjetivas, las categorías que reflejen con mayor objetividad de qué estamos hablando cuando hablamos de violencia, implica mucha complejidad. Es un concepto viciado de connotaciones afectivas, subjetivas e ideológicamente fragmentadas como para que sea fácil de definir. Conocemos lo que han dicho muchos autores desde los antiguos filósofos hasta los contemporáneos que tratan de explicar es...

  4. Parkour como medio mortriz

    OpenAIRE

    Gutiérrez Opazo, Rodolfo; Rosales Calderon, Diego

    2011-01-01

    Desde el inicio de la era del hombre, el Parkour siempre ha existido, simplemente que no había sido considerado con este nombre hasta un par de décadas atrás y de ahí una breve trayectoria desde Francia al resto del mundo por un grupo de personas que llamaron al arte del desplazamiento como "Parkour". Utilizando las herramientas de Internet, el Parkour en Chile ha ido ganando adeptos día a día, y la edad de iniciación a esta disciplina es cada vez menor, otorgando una adaptación motriz mayor ...

  5. 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.

  6. 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. PMID:26297516

  7. Exogenous stimulation with Eclipta alba promotes hair matrix keratinocyte proliferation and downregulates TGF-β1 expression in nude mice.

    Science.gov (United States)

    Begum, Shahnaz; Lee, Mi Ra; Gu, Li Juan; Hossain, Jamil; Sung, Chang Keun

    2015-02-01

    Eclipta alba (L.) Hassk (E. alba) is a traditionally acclaimed medicinal herb used for the promotion of hair growth. However, to the best of our knowledge, no report has been issued to date on its effects on genetically distorted hair follicles (HFs). In this study, we aimed to identify an agent (stimuli) that may be beneficial for the restoration of human hair loss and which may be used as an alternative to synthetic drugs. We investigated the effects of petroleum ether extract (PEE) and different solvent fractions of E. alba on HFs of nude mice. Treatment was performed by topical application on the backs of nude mice and the changes in hair growth patterns were evaluated. Histological analysis was carried out to evaluate the HF morphology and the structural differences. Immunohistochemical (IHC) staining was performed to visualize follicular keratinocyte proliferation. The histological assessments revealed that the PEE-treated skin specimens exhibited prominent follicular hypertrophy. Subsequently, IHC staining revealed a significant increase (p<0.001) in the number of follicular keratinocytes in basal epidermal and matrix cells. Our results also demonstrated that PEE significantly (p<0.001) reduced the levels of transforming growth factor-β1 (TGF-β1) expression during early anagen and anagen-catagen transition. Our results suggest that PEE of E. alba acts as an important exogenous mediator that stimulates follicular keratinocyte proliferation and delays terminal differentiation by downregulating TGF-β1 expression. Thus, this study highlights the potential use of PEE of E. alba in the treatment of certain types of alopecia. PMID:25484129

  8. Leguminosas leñosas de rápido crecimiento como cultivos energéticos en el Suroeste de la Península Ibérica

    OpenAIRE

    Tapias Martín, Raúl; Fernández Martínez, Manuel; Alaejos Gutiérrez, Joaquín; Salvador Nemoz, María Laura; Alesso, Patricia; González Duque, José Antonio; Alfaro Martínez, Ascensión; López Baldovín, Francisco; Díaz Blanco, Manuel Jesús

    2008-01-01

    Este estudio pretende evaluar las posibilidades del empleo de leguminosas leñosas de rápido crecimiento como cultivos destinados a la producción de biomasa como fuente de energía. El ensayo consistió en el cultivo de 14 especies / procedencias de los géneros Leucaena (L. leucocephala, L. salvadorensis, L. diversifolia, L. collinsi), Prosopis (P. alba y P. julyflora), Sesbania (S. sesban), Chamaecytisus (C. proliferus var palmensis) y Retama (R. monosperma). Las plan...

  9. 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

  10. El inquisidor como profesor

    Directory of Open Access Journals (Sweden)

    Adriano PROSPERI

    2009-12-01

    Full Text Available Giovanni Botero, en una célebre página de su Ragion di stato, se detuvo sobre el tema de la fuerza de la religión en los gobiernos. Esta función de la religión cristiana —para Botero, católica— es garante del orden público y se presenta también como opuesta a la generadora de desorden de Lutero y Calvino, quienes siembran por todo cizañas y revoluciones de estados y ruinas de los reinos. Estamos en los orígenes del esquema historiografía de la periodización de la Edad Moderna que confió precisamente a la Reforma el papel de nodriza de las revoluciones que nacieron en Europa.

  11. O ensaio como narrativa

    Directory of Open Access Journals (Sweden)

    Pedro Duarte

    2016-02-01

    Full Text Available O artigo tenta demonstrar que todos os textos, mesmo aqueles cuja natureza é teórica, têm alguma forma de narrativa. Nem sempre são personagens que os ocupam, podem ser ideias, mas mesmo assim há um enredo conceitual que se passa. Modernamente, a forma dessa narrativa foi sobretudo o sistema, com a pretensão totalizadora presente, por exemplo, na filosofia de Hegel. Contemporaneamente, porém, a forma do ensaio – surgida ainda na era moderna – ganha destaque por sua forma descontínua de narrar. O objetivo do artigo é apontar que, se o ensaio é uma forma, como explicitaram Lukács, Benjamin e Adorno, ele é também uma forma de narrar – ainda que de narrar conceitualmente objetos da cultura.

  12. La identidad como performatividad

    Directory of Open Access Journals (Sweden)

    Andrés Felipe Castelar

    2008-12-01

    Full Text Available La presión social por constituir una forma indentitaria que sea acorde con el referente biológico es de origen histórico y se encuentra al servicio de prácticas de control y dominación social. Este artículo presenta una discusión sobre el lugar actual de la idea de identidad, especialmente en el plano de la sexualidad. Para esto recurre a la tesis de la filósofa Judith Butler, quien propone desde una visión deconstructivista y post-estructuralista una nueva definición de idenridad en términos de la iteración performativa. La identiclad es entendida entonces como una exigencia de inteligibiliclacl ante la sociedad, la cual limita las posibiliclades de expresión sexual.

  13. Tantas caperucitas como lobos

    OpenAIRE

    Guardia Calvo, Isadora

    2007-01-01

    Caperucita Roja es un cuento que se origina como relato oral en Francia mucho antes de que Perrault lo normalizara en su libro Contes de Ma Mere L'Oye publicado en 1697. A través de su evolución en el tiempo Caperucita invade otros géneros además del literario. El cine, la fotografía, la ilustración, reinterpretan la relación entre la joven y el lobo desde el impresionismo al psicoanálisis pasando por las relaciones de estructura social, etc. En ocasiones los textos originales requieren de un...

  14. Los sistemas de vigilancia electrónica como sustitutivos de la prisión bajo una perspectiva analítico-económica del derecho

    Directory of Open Access Journals (Sweden)

    Norberto Hernández Jiménez

    2012-04-01

    Full Text Available El 28 de julio de 2007 fue sancionada por el Ejecutivo la Ley 11423, con el objetivo de adoptar medidas tendientes a prevenir y reprimir la actividad delictiva de especial impacto para la convivencia y seguridad ciudadana. En esta ley (artículo 50 se incorporan los mecanismos de vigilancia electrónica como sustitutivos de la pena privativa de la libertad, creando así una alternativa frente a las características “estigmatizantes” y “excluyentes”4 de la prisión intramural. La novísima ley de seguridad ciudadana (Ley 1453 de 2011 introdujo algunas modificaciones a esta norma jurídica, limitando este beneficio mediante la ampliación del listado de delitos que hacen improcedente la sustitución de la pena privativa de la libertad y la imposibilidad de resultar beneficiado más de una vez con el mismo sustituto, sin embargo, acorde con la doctrina constitucional (sentencia C-185/11, se morigeraron algunos requisitos relacionados con el pago de la multa y la indemnización de perjuicios por la insolvencia del condenado. Ahora bien, la Corte Constitucional desde el año 1998 (Sentencia T-153 había declarado el estado de cosas inconstitucional en las prisiones del país, atendiendo a la imposibilidad de los reclusos para gozar de una vida digna como consecuencia del hacinamiento. El presente artículo pretende demostrar como a través de la vigilancia electrónica se disminuye la problemática de hacinamiento carcelario y las implicaciones económicas que subyacen en esta implementación, sus bondades y sus defectos.

  15. 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.

  16. Inhibition of Sanggenon G Isolated from Morus alba on the Metastasis of Cancer Cell

    Institute of Scientific and Technical Information of China (English)

    CUI Long; LEE Hyun-sun; OH Won-keun; AHN Jong-seog

    2011-01-01

    Objective An organic layer prepared from the cortex of Morus alba (Moraceae) was studied in order to identify the active compounds for heparinase. Methods Bioassay-guided fractionation resulted in the isolation of sanggenon G Results The compound showed inhibitory activity with IC50 of 3.7 μmol/L on heparinase in vitro as well as 24 μmol/L in invasion assay using MDA-MB231 cells. Sanggenon G also had the moderate cytotoxicity at SW 620 (colon) and ACHN (kidney) cancer cell lines with IC50 of 10.96 and 13.44 μmol/L, respectively. Conclusion This is the first time that prenylated flavonoid sanggenon G is described as heparinase inhibitor. Besides, this flavonoid would be expected to be a metastasis inhibitor of cancer cells and also a valuable reagent to explore the mechanism of heparinase/heparanase-mediated metastasis.

  17. Potential pancreatic lipase inhibitory activity of phenolic constituents from the root bark of Morus alba L.

    Science.gov (United States)

    Ha, Manh Tuan; Tran, Manh Hung; Ah, Kim Jeong; Jo, Kyung-Jin; Kim, Jaewang; Kim, Wook Dong; Cheon, Woo Jae; Woo, Mi Hee; Ryu, Sung Ho; Min, Byung Sun

    2016-06-15

    Detailed phytochemical investigation from the root bark of Morus alba resulted in the isolation of eleven new compounds, including seven 2-arylbenzofuran derivatives (morusalfurans A-G), three flavonoids (morusalnols A-C), and one geranylated stilbene (morusibene A), as well as 22 known compounds. The structures of the identified compounds were elucidated based on a comprehensive analysis of spectroscopic data and Mosher's method. Compounds 2, 3, 6-8, 11, 23, 24, and 29 showed potent inhibition of PL in comparison with the positive control treatment (orlistat, IC50=0.012μM), with IC50 values ranging from 0.09 to 0.92μM. PMID:27156775

  18. Fatty acids composition of Spanish black (Morus nigra L.) and white (Morus alba L.) mulberries.

    Science.gov (United States)

    Sánchez-Salcedo, Eva M; Sendra, Esther; Carbonell-Barrachina, Ángel A; Martínez, Juan José; Hernández, Francisca

    2016-01-01

    This research has determined qualitatively and quantitatively the fatty acids composition of white (Morus alba) and black (Morus nigra) fruits grown in Spain, in 2013 and 2014. Four clones of each species were studied. Fourteen fatty acids were identified and quantified in mulberry fruits. The most abundant fatty acids were linoleic (C18:2), palmitic (C16:0), oleic (C18:1), and stearic (C18:0) acids in both species. The main fatty acid in all clones was linoleic (C18:2), that ranged from 69.66% (MN2) to 78.02% (MA1) of the total fatty acid content; consequently Spanish mulberry fruits were found to be rich in linoleic acid, which is an essential fatty acid. The fatty acid composition of mulberries highlights the nutritional and health benefits of their consumption. PMID:26213011

  19. Effects of the Methanol Extract of Basella alba L (Basellaceae on Steroid Production in Leydig Cells

    Directory of Open Access Journals (Sweden)

    Carine Travert

    2011-01-01

    Full Text Available In this study, Leydig cells were purified from 70 day-old Sprague Dawley male rats and incubated with 10 and 100 µg/mL of methanol extract of Basella alba (MEBa for 4 hours followed by the evaluation of cell viability, steroid (testosterone and estradiol production, and the level of aromatase mRNA. Results showed that MEBa did not affect Leydig cell viability. At the concentration of 10 µg/mL, MEBa significantly stimulated testosterone and estradiol production (p < 0.01 and p < 0.03, respectively, and enhanced aromatase mRNA level (p < 0.04. These observations suggest that MEBa directly stimulated testosterone, estradiol and aromatase mRNA levels in isolated Leydig cells.

  20. Effects of the methanol extract of Basella alba L (Basellaceae) on steroid production in Leydig cells.

    Science.gov (United States)

    Nantia, Edouard Akono; Travert, Carine; Manfo, Faustin-Pascal T; Carreau, Serge; Monsees, Thomas K; Moundipa, Paul Fewou

    2011-01-01

    In this study, Leydig cells were purified from 70 day-old Sprague Dawley male rats and incubated with 10 and 100 μg/mL of methanol extract of Basella alba (MEBa) for 4 hours followed by the evaluation of cell viability, steroid (testosterone and estradiol) production, and the level of aromatase mRNA. Results showed that MEBa did not affect Leydig cell viability. At the concentration of 10 μg/mL, MEBa significantly stimulated testosterone and estradiol production (p < 0.01 and p < 0.03, respectively), and enhanced aromatase mRNA level (p < 0.04). These observations suggest that MEBa directly stimulated testosterone, estradiol and aromatase mRNA levels in isolated Leydig cells. PMID:21339992

  1. La adherencia en los morteros de albañilería

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    Cabrera, Jorge Luis

    1995-12-01

    Full Text Available The work presents a study carried out to determine the bond strength reached by bricklaying mortars at 28 days. 23 different dosages were prepared using 4 cement types, 2 sand types and 4 aggregate types. The results prove the feasibility of using the mentioned method to determine bond strength. The values at 28 days reached up to 0.7 MPa.

    Se hace un estudio para determinar la resistencia a la adherencia que alcanzan los morteros de albañilería a los 28 días. Para ello se prepararon dosificaciones de morteros con 4 tipos de cementos, 2 tipos de arenas y 4 tipos de agregados, lográndose realizar 23 dosificaciones. Los resultados demuestran la factibilidad de emplear dicho método para determinar la resistencia a la adherencia. Se obtuvieron valores de hasta 0,7 MPa a los 28 días.

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

    Directory of Open Access Journals (Sweden)

    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.

  3. A soft X-ray beamline for transmission X-ray microscopy at ALBA.

    Science.gov (United States)

    Pereiro, E; Nicolás, J; Ferrer, S; Howells, M R

    2009-07-01

    The MISTRAL beamline is one of the seven phase-I beamlines at the ALBA synchrotron light source (Barcelona, Spain) that will be opened to users at the end of 2010. MISTRAL will be devoted to cryotomography in the water window and multi-keV spectral regions for biological applications. The optics design consists of a plane-grating monochromator that has been implemented using variable-line-spacing gratings to fulfil the requirements of X-ray microscopy using a reflective condenser. For instance, a fixed-focus condition independent of the included angle, constant magnification as well as coma and spherical aberration corrections are achieved with this system. The reported design is of wider use. PMID:19535865

  4. 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.

  5. Prey selection by the Barn Owl Tyto alba (Scopoli, 1769 in captivity

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    V. Vanitha

    2009-07-01

    Full Text Available We investigated prey selection of the Barn Owl Tyto alba under captive conditions where birds were allowed to choose among individuals of varying size from four field rodent species: Bandicota bengalensis, Millardia meltada, Tatera indica and Mus booduga. Owls showed little species preference and a tendency to favour the medium weight class in all prey species except M. booduga. Preference for body parts consumed varied according to prey size, ranging from the head alone in the large weight class to the entire body in the small weight class. Biochemical measurements showed that protein, carbohydrate and lipid levels were higher respectively in the brain, liver and muscles of all three species and weight classes studied. The preference for medium weight prey despite a lower nutrient content compared to large weight prey is attributed to a greater ease of capture.

  6. ASPECTS CONCERNING TAX EVASION IN ALBA COUNTY AND BRAŞOV REGION

    Directory of Open Access Journals (Sweden)

    Claudia Florina Radu

    2014-09-01

    Full Text Available One of the effects of evasion is the reduction in tax revenues, so the state will have less money to supply public goods and services. Instead, if there are sustained efforts to reduce tax evasion, revenues to the budget will increase, will exist resources to counter the economic crisis and for providing public services to citizens: education, health, social security etc. Additional money obtained from reducing tax evasion would solve many of the problems related to the lack of resources facing states today. That is why it is so important to combat and reduce tax evasion, both nationally and globally. Starting from the analysis of some data about tax audit and budget revenues of Alba County, we highlighted the main factors that determine people to pay taxes: firstly, the positive incentives, then the fear of negative consequences of non-payment, and, to a small extent, the moral factors.

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

    Directory of Open Access Journals (Sweden)

    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.

  8. 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...

  9. Trends in North American small mammals found in common barn-owl (Tyto alba) dietary studies

    Science.gov (United States)

    Clark, D.R., Jr.; Bunck, C.M.

    1991-01-01

    Data on mammals were compiled from published studies of common barn-owl (Tyto alba) pellets. Mammalian composition of pellet samples was analyzed within geographic regions in regard to year, mean annual precipitation, latitude, and number of individual mammals in the sample. Percentages of individuals in pellets that were shrews increased whereas the percentages of rodents decreased with greater mean annual precipitation, especially in northern and western areas of North America. From the 1920s through 1980s, in northern and eastern areas the percentage of species that was shrews decreased, and in northern and central areas the percentage of individuals that was murid rats and mice increased. Human alterations of habitats during these seven decades are postulated to have caused changes in available small mammals, leading to changes in the barn-owl diet.

  10. STRENGTH OF GLUED JOINTS OF Inga alba (SW Willd AND Swartzia recurva  Poepp WOOD

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    Setsuo Iwakiri

    2015-09-01

    Full Text Available The objective of this study was to evaluate the quality of wood bonded joints of Inga alba and Swartzia recurva using polyvinyl acetate (PVAc and polymeric emulsion of isocyanate (EPI in weights of 150 and 200 g.m-². The strength of the bonded joints was evaluated through shear tests, using the procedures described in EN 13354 (2008. The increase in weight did not influence the results of shear strength, indicating the benefits in economic terms with the reduction in the consumption of adhesive. Joints glued with the wood species of Swartzia recurve with EPI adhesive, at the two weights have reached the minimum value of 2.5 MPa concerning the lower 5th percentile established by EN 13353 (2008. The results demonstrated the feasibility of using wood of Swartzia recurva to produce edge glued panels - EGP, with EPI adhesive in weight of 150 g.m-².

  11. 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.

  12. Effects of aqueous extracts of Hibiscus macranthus and Basella alba in mature rat testis function.

    Science.gov (United States)

    Moundipa, F P; Kamtchouing, P; Koueta, N; Tantchou, J; Foyang, N P; Mbiapo, F T

    1999-05-01

    Mature male albino Wistar rats (180-220 g) were given by gastric intubation Hibiscus macranthus Hochst A ex Rich (Malvaceae) and Basella alba L. (Basellaceae) aqueous extract from both fresh and dry leaves, at a dose equivalent to 0.720 or 0.108 g of plant, respectively per kg body weight. This was to evaluate their effects on male reproductive function. Control groups were treated equally, but given water instead of the extract. After the treatment periods, animals were killed, their blood collected, the testes and some annex glands removed for histological and biochemical analysis. Results showed that the extract from fresh leaves significantly increased the body weight of rats by 17% from day 7 as compared to controls, whereas the increase was less pronounced (4%) when the rats were given dry leaf extract. The weight of seminal vesicles of rats given the extracts also increased after 15 days. The histological analysis of testis showed abundant spermatozoa in the lumen of the seminiferous tubulus from day 7 in rats fed with the extract when compared to the controls. The serum level of testosterone was significantly increased on the 15th day by 80% in rats given both types of extracts compared to the controls. Testis of treated rats showed high testosterone production in vitro (136 and 62%, respectively for treated and control after 15 days, compared to those of 3 days). Activity of prostatic acid phosphatase was high in prostate, testis and serum of treated rats in all experimental period. From these findings and observation, it was concluded that the aqueous extract of H. macranthus and B. alba had anabolizing and virilizing effects. PMID:10465653

  13. Postremediation dose assessment for the former Alba Craft Laboratory site, Oxford, Ohio

    Energy Technology Data Exchange (ETDEWEB)

    Kamboj, S.; Nimmagadda, M.; Yu, C. [Argonne National Lab., IL (United States). Environmental Assessment Div.

    1996-04-01

    Potential maximum radiation dose rates were calculated for the former Alba Craft Laboratory site in Oxford, Ohio, which was involved in machining of uranium metal in the 1950s for the U.S. atomic energy program. The site is not currently being used. The residual radioactive material guidelines (RESRAD) computer code, which implements the methodology described in the US Department of Energy`s (DOE`s) manual for establishing residual radioactive material guidelines, was sued in this evaluation. Three potential land use scenarios were considered for the former Alba Craft site; the scenarios vary with regard to the type of site use, time spent at the site by the exposed individual, and sources of food consumed. Scenario A (a possible land use scenario) assumed industrial use of the site; Scenario B (a likely future land use scenario) assumed residential use of the site; and Scenario C (a possible but unlikely land use scenario) assumed the presence of a resident farmer. For scenario A, it was assumed that any water used for domestic or industrial activities would be from uncontaminated off-site municipal sources. The water used for drinking, household purposes, and irrigation was assumed to be from uncontaminated municipal sources in Scenario B; groundwater drawn from a well located at the downgradient edge of the contaminated zone would be the only source of water for drinking, irrigation, and raising livestock in Scenario C. The results of the evaluation indicated that the DOE dose limit of 100 mrem/yr would not be exceeded for any of the scenarios analyzed. The potential maximum dose rates for Scenarios A, B, and C are 0.64, 2.0, and 11 mrem/yr, respectively.

  14. Radical Scavenging Activity of the Essential Oil of Silver Fir (Abies alba).

    Science.gov (United States)

    Yang, Seun-Ah; Jeon, Sang-Kyung; Lee, Eun-Jung; Im, Nam-Kyung; Jhee, Kwang-Hwan; Lee, Sam-Pin; Lee, In-Seon

    2009-05-01

    The essential oil of silver fir (Abies alba) is known to help respiratory system and have easing and soothing effect for muscle. In the present study, we investigated the chemical composition, cytotoxicity and its biological activities of silver fir (Abies alba) essential oil. The composition of the oil was analyzed by GC-MS and bornyl acetate (30.31%), camphene (19.81%), 3-carene (13.85%), tricyclene (12.90%), dl-limonene (7.50%), alpha-pinene (2.87%), caryophyllene (2.18%), beta-phellandrene (2.13%), borneol (1.74%), bicyclo[2.2.1]hept-2-ene,2,3-dimethyl (1.64%) and alpha-terpinene (1.24%) were the major components in the oil. The results tested by 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide (MTT) assay indicated that the oil showed no cytotoxic effect, at concentrations of 1 and 5%, for as long as 24 and 3 h, respectively. The antiradical capacity was evaluated by measuring the scavenging activity of the essential oil on the 2,20-diphenylpicrylhydrazyl (DPPH) and 2,2'-azino-bis 3-ethyl benzothiazoline-6-sulfonic acid (ABTS) radicals. The oil was able to reduce the both radicals dose-dependently, and the concentration required for 50% reduction (RC(50)) against DPPH radicals (2.7 +/- 0.63%) was lower than ABTS radicals (8.5 +/- 0.27%). The antibacterial activity of the oil was also evaluated using disc diffusion method against Staphylococcus aureus, Streptococcus mutans, Listeria monocytogenes, Acinetobacter baumannii, Escherichia coli, and Vibrio parahaemolyticcus. The oil exhibited no antibacterial activity against all the bacterial strains tested except S. aureus of mild activity. PMID:19430614

  15. Postremediation dose assessment for the former Alba Craft Laboratory site, Oxford, Ohio

    International Nuclear Information System (INIS)

    Potential maximum radiation dose rates were calculated for the former Alba Craft Laboratory site in Oxford, Ohio, which was involved in machining of uranium metal in the 1950s for the U.S. atomic energy program. The site is not currently being used. The residual radioactive material guidelines (RESRAD) computer code, which implements the methodology described in the US Department of Energy's (DOE's) manual for establishing residual radioactive material guidelines, was sued in this evaluation. Three potential land use scenarios were considered for the former Alba Craft site; the scenarios vary with regard to the type of site use, time spent at the site by the exposed individual, and sources of food consumed. Scenario A (a possible land use scenario) assumed industrial use of the site; Scenario B (a likely future land use scenario) assumed residential use of the site; and Scenario C (a possible but unlikely land use scenario) assumed the presence of a resident farmer. For scenario A, it was assumed that any water used for domestic or industrial activities would be from uncontaminated off-site municipal sources. The water used for drinking, household purposes, and irrigation was assumed to be from uncontaminated municipal sources in Scenario B; groundwater drawn from a well located at the downgradient edge of the contaminated zone would be the only source of water for drinking, irrigation, and raising livestock in Scenario C. The results of the evaluation indicated that the DOE dose limit of 100 mrem/yr would not be exceeded for any of the scenarios analyzed. The potential maximum dose rates for Scenarios A, B, and C are 0.64, 2.0, and 11 mrem/yr, respectively

  16. 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.

  17. Effect of light regime on the natural regeneration of silver fir (Abies alba, Calabria, Southern Italy

    Directory of Open Access Journals (Sweden)

    Mercurio R

    2008-06-01

    Full Text Available Aim of this study is to analyse the effect of light environment on dynamics of natural regeneration of silver fir. The study areas were located in natural silver fir (Abies alba Mill. stands of Serra San Bruno Forests (Archiforo in the Calabrian Apennine. Measurements of the Photosynthetically Active Radiation (PAR - radiation in the 0.4-0.7 µm waveband were collected with a ceptometer (AccuPAR Decagon Devices, USA. PAR was measured monthly during the growing season. Measurements were taken: under canopy, inside natural gaps and in correspondence of escarps along forestry roads. After each measurement for each sampling point the PAR transmittance was calculated. Seedlings density was estimated in each position. Each of these seedlings was identified by species, total height was measured and the age was visually determined. Seedlings were distributed in three classes: (a class 0: to natural regeneration absence and height 10 seedlings m-2 and height between 0.30 and 1 m; (c class 2: to density > 10 seedlings m-2 and height > 1 m. Level of PAR transmittance was higher inside the gaps where a good seedlings density was observed. Further seedling density was higher in correspondence of escarps. Under canopy, seedlings were absent due to low levels of light (1.3 < T < 3.7. The results showed a diverse ecological behaviour to light environment of silver fir of Serra San Bruno compared with central-northern Abies alba population. Some comments about silvicultural treatment of silver fir stand in the Calabrian Apennine are provided, according to dynamics of natural regeneration.

  18. El trabajo infantil como producto de las diferencias en la metabolización de las significaciones imaginarias sociales en diferentes sectores de la sociedad

    OpenAIRE

    Pérez, Edith Alba; Ciari, Germán; Chairo, Luciana; Delfino, Juan

    2007-01-01

    En Octubre del año 2005, con aprobación y subsidio de la Comisión de Investigaciones Científicas de la Provincia de Buenos Aires, iniciamos el desarrollo de la investigación “Significaciones y Sentidos del Trabajo Infantil en dos Barrios de la Zona Sur de La Plata”. Se trata de un estudio exploratorio para abordar las producciones de sentido y las marcas subjetivas en relación al trabajo infantil, tanto en adultos como en niños/as residentes en los barrios Palihue y Villa Alba. El equipo d...

  19. La persona como creatura

    Directory of Open Access Journals (Sweden)

    Emmanuel Housset

    2010-01-01

    Full Text Available El artículo de Emmanuel Housset implica un esfuerzo de rehabilitación del concepto «persona» para la filosofía contemporánea y la fenomenología. Para ello el autor busca mostrar cómo poco a poco «persona» tomó otra significación que la de «personaje» o sujeto de derecho. Es en autores como san Agustín y santo Tomás de Aquino que se halla un acceso diferente que pone el énfasis más bien en su carácter relacional y responsivo de la persona, antes que en su dimensión autónoma y autotélica. Tal dimensión aparece, según Housset, junto con la idea de persona como creatura y en oposición a la de individuo racional dueño de sí. La dimensión afectiva, la personalidad despertada por las diversas figuras de la alteridad son algunas de las dimensiones de la persona que examina el autor a partir del examen de la carne, las pasiones, la memoria, la historicidad y el amor alteridad.Emmanuel Housset's paper is an effort to revitalize the concept of 'person' for contemporary philosophy and phenomenology To this end the author looks to show how little by little the understanding of 'person' took on a different meaning to that of 'character' or "right bearing individual". It is in authors such as St. Augustine and St. Thomas Aquinas that a different approach is found, one that puts emphasis on the relational and responsive character of a person, rather than on the autonomous and auto telic dimension. According to Housset, such a dimension appears together with the idea of the person as a creation, and in opposition to the idea of the rational individual, that is his own master. The emotional dimension and the personality that is awoken by the many figures of alterity are some of the dimensions of the person that the author analyzes, based on examining the flesh, passions, memory historicity and love.

  20. El riesgo como oportunidad

    Directory of Open Access Journals (Sweden)

    Daniela Gargantini

    2003-01-01

    Full Text Available Durante los últimos años el crecimiento mundial de catástrofes naturales ha ido en franco aumento. Sin embargo, desde un enfoque sistémico puede verificarse que la gran mayoría de los desastres se origina en los países en desarrollo (entre ellos los latinoamericanos, siendo las pérdidas en ellos significativamente más altas que en los países industrializados. Bajo esta postura los desastres no son sólo naturales sino socio- naturales, enfatizando la estrecha relación de causalidad entre modelos de desarrollo y urbanización y procesos de generación de riesgos, al incrementar la vulnerabilidad de los sectores más desprotegidos. El desastre pone en evidencia así una situación (la pobreza y segregación urbana ya existente, pero no considerada hasta el momento de la catástrofe. Frente a este panorama el desastre aparece como oportunidad que precipita tres catalizadores de políticas habitacionales: tierra, asistencia técnica y financiamiento, incrementando la celeridad y la creatividad de las respuestas. El interrogante que surge es por qué esperar el desastre para ponerlos en marcha, cuando ninguno de ellos es estrictamente dependiente de la situación de riesgo, sino sujeto de luchas de poder.

  1. El signo como emblema

    Directory of Open Access Journals (Sweden)

    Sáez, Carlos

    2003-06-01

    Full Text Available The aim of this article is to study the signs and symbols that appear in the hispanic medieval documents and manuscripts. These signs and symbols have usually been considered simply as mere elements to validate the charters. However, these alements were useful as a mean of visual communication between the high classes, able to generate charters, and the rest of medieval society—the majority illiterate— who received those charters. Because of their inability of understand an alphabetical code, they needed the graphic help to comprehend the message. Besides this, the article deals with non diplomatic signs and their function.

    Este artículo se centra en los signos o símbolos presentes en los documentos y manuscritos medievales hispanos, que habitualmente han sido tratados como meros elementos de validación de los diplomas. Pero estos elementos servían también de nexos de comunicación visual entre las clases poderosas, capaces de producir escritos, y los demás miembros de la sociedad medieval, receptores y destinatarios de tales escritos, en su mayoría analfabetos. Precisamente por esta razón, su incapacidad de descifrar un código alfabético, necesitan de auxilio gráfico para acercarse a la comprensión del mensaje. Asimismo, tratamos de los signos no diplomáticos y de su función.

  2. Endomarketing: como diferencial competitivo

    Directory of Open Access Journals (Sweden)

    Karin Birck

    2013-05-01

    Full Text Available Atualmente, com a profissionalização das empresas e com a grande concorrência no mercado, observa-se uma demanda cada vez maior de gestores comprometidos com o bem-estar pessoal e profissional de seus colaboradores. E, com esse intuito, de apresentar algumas idéias básicas de gestão voltadas à aplicação nas mais diversas técnicas de Endomarketing. Demonstra assim, a importância da utilização de feedback, tanto por parte dos colaboradores quanto dos gestores, destacando a importância de trabalhos de motivação, do clima organizacional favorável e de uma comunicação interna eficaz e a necessidade ímpar de tratar o colaborador como o diferencial dentro de uma empresa. Desta forma, foi realizada uma pesquisa bibliográfica que auxiliará e dará subsídios que lhe permitam retribuir em ações e atitudes de sucesso e, também, fazer um confronto de idéias, onde os autores apresentam suas mais diversas opiniões. Contudo, valendo-se, muitas vezes, de narrativas de experiências de outros gestores e até mesmo de suas próprias, tirando cada um suas próprias conclusões.

  3. Genetic variation among South Brazilian accessions of Lippia alba Mill. (Verbenaceae) detected by ISSR and RAPD markers Variabilidade genética entre acessos sul-brasileiros de Lippia alba Mill. (Verbenaceae) detectada por ISSR e RAPD

    OpenAIRE

    MF. Manica-Cattani; J. Zacaria; G Pauletti; L. Atti-Serafini; S Echeverrigaray

    2009-01-01

    Twenty-seven accessions of Lippia alba Mill. collected in Rio Grande do Sul state, Brazil, were analysed by ISSR and RAPD markers to evaluate their genetic variability and relationships. Six ISSR primers and four RAPD primers generated 120 amplified fragments, most of which were polymorphics. The overall genetic variability among accessions was very high when compared with other plant species. The hierarchical analysis of molecular data (UPGMA) showed low relationship between accessions, and ...

  4. O direito como imperativo

    Directory of Open Access Journals (Sweden)

    Cloter Miglioriani

    1988-08-01

    Full Text Available We have examined one of the facets which Law presents to society, looking at the theme through a brief history of Law, in which Roman Law stands out, up to modem times, comparing current juridical systems such as the Continental System, Common Law, and Soviet Law. We have looked at Law from the viewpoint of society 's need to have basic mies for living together, with the juridical ruZe being one of the most important. We have highlighted the views of Hart and Kelsen on the foundations of the validity of Law. We have also considered the obligatoriness of Law; giving the point of view of tadbruch who, explaining his ''Theory of the Obligatoriness of Law ", concluded that the obligatoriness of Law can only be withdraw when there is a Clash between morals, law, use and social conventions. We have looked at the notion of the imperativeness of Law the central theme of the work -drawing on the views of Miguel Reale, for whom the juridical nonn cannot be reduced to a "command of a volitional nature", but rather the obligatory character of the juridical nonn arises from the pressure of social values. Del Vecchio, who is also quoted, recognized that imperativeness exists in the juridical norm, whether it is preceptive (a positive command or permissive. Also mentioned is the opinion of Tercio Sampaio Ferraz, for whom the juridical norm has imperativeness to the extent that the imposition of behaviour is unconditionally guaranteed. Foi feita a abordagem de uma das facetas com que o Direito se apresenta à sociedade, enfocando o tema a partir de um brevíssimo histórico do Direito, onde revela a fase romana, até os períodos modernos, com comparações dos sistemas jurídicos hodiernos, como o sistema continental, o da Commum Law e o soviético. Foi enfocado o Direito em face da necessidade sociedade em ter básicas de convivência, despontando a regra jurídica como das mais importantes. Foi dado destaque às posições de Hart e Kelsen, sobre os

  5. Genetic variation among South Brazilian accessions of Lippia alba Mill. (Verbenaceae) detected by ISSR and RAPD markers.

    Science.gov (United States)

    Manica-Cattani, M F; Zacaria, J; Pauletti, G; Atti-Serafini, L; Echeverrigaray, S

    2009-05-01

    Twenty-seven accessions of Lippia alba Mill. collected in Rio Grande do Sul state, Brazil, were analysed by ISSR and RAPD markers to evaluate their genetic variability and relationships. Six ISSR primers and four RAPD primers generated 120 amplified fragments, most of which were polymorphics. The overall genetic variability among accessions was very high when compared with other plant species. The hierarchical analysis of molecular data (UPGMA) showed low relationship between accessions, and no grouping between accessions of the same chemotype. Canonical functions allowed identifying some variables related with the chemical characteristics of the essential oils. Both ISSR and RAPD markers were efficient to address the genetic diversity of L. alba, and may contribute to the conservation and breeding of this increasingly important aromatic and medicinal species. PMID:19675941

  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. Profil hlapljivih tvari hrvatskih medova lipe (Tilia sp.), medljikovca jele (Abies alba) i meda kadulje (Salvia officinalis)

    OpenAIRE

    Lušić, Dražen; Koprivnjak, Olivera; Ćurić, Duška; Sabatini, Anna G.; Conte, Lanfranco S.

    2007-01-01

    Profili hlapljivih tvari meda lipe (Tilia sp.), medljikovca jele (Abies alba) i meda kadulje (Salvia officinalis), proizvedeni u Hrvatskoj, istraživani su najprije metodom mikroekstrakcije na čvrstoj fazi (head space solid phase microextraction, HS-SPME), a zatim s plinskom kromatografijom i masenom spektrometrijom (gas chromatography-mass spectrometry, GC-MS). Botaničko porijeklo uzoraka meda potvrđeno je melisopalinološkom i senzorskom analizom. Prvi su put opisana senzorska svojstva meda o...

  8. The SolemnAddress Uttered by Vasile Goldiş in Alba-Iulia on 1 December, 1918

    OpenAIRE

    Eugen GAGEA

    2011-01-01

    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”.

  9. Raphanus sativus, Sinapis alba, and Fagopyrum esculentum as Hosts to Meloidogyne incognita, Meloidogyne javanica, and Plasmodiophora brassicae

    OpenAIRE

    Gardner, J; Caswell-Chen, E.P.

    1994-01-01

    Cultivars of oilseed radish (Raphanus sativus var. oleifera cv. Adagio, Nemex, Pegletta, Renova, Siletina, Siletta Nova, and Ultimo), white mustard (Sinapis alba cv. Albatross, Emergo, Maxi, Martigena, Metex, and Serval), buckwheat (Fagopyrum esculentum cv. Prego, Tardo), and phacelia (Phacelia tanacetifolia cv. Angelia) were tested for susceptibility to Meloidogyne incognita race 3 and Meloidogyne javanica. Experiments were conducted in growth chambers at 25 C and 16 hours light for 42 days ...

  10. White Mulberry (Morus alba) Foliage Methanolic Extract Can Alleviate Aeromonas hydrophila Infection in African Catfish (Clarias gariepinus)

    OpenAIRE

    Atefeh Sheikhlar; Abd Razk Alimon; Hassan Daud; Saad, Chee R.; Webster, Carl D.; Goh Yong Meng; Mahdi Ebrahimi

    2014-01-01

    Two experiments were simultaneously conducted with Morus alba (white mulberry) foliage extract (MFE) as a growth promoter and treatment of Aeromonas hydrophila infection in separate 60 and 30 days trail (Experiments 1 and 2, resp.) in African catfish (Clarias gariepinus). In Experiment 1, four diets, control and control supplemented with 2, 5, or 7 g MFE/kg dry matter (DM) of diet, were used. In Experiment 2, fish were intraperitoneally infected with Aeromonas hydrophila and fed the same diet...

  11. Penetration, Development, and Reproduction of Heterodera schachtii on Fagopyrum esculentum, Phacelia tanacetifolia, Raphanus sativus, Sinapis alba, and Brassica oleracea

    OpenAIRE

    Gardner, J.; Caswell-Chen, E. P.

    1993-01-01

    The penetration, development, and reproduction of a California population of the sugarbeet cyst nematode, Heterodera schachtii, was observed on cultivars of cabbage (Brassica oleracea), phacelia (Phacelia tanacetifolia), buckwheat (Fagopyrum esculentum), oilseed radish (Raphanus sativus), and white mustard (Sinapis alba). With the exception of the nonhost, phacelia, all were readily penetrated by second-stage juveniles of H. schachtii. After 38 days at 25 C, no cysts were observed on phacelia...

  12. Tree-ring growth and climate response of silver fir (Abies alba Mill. in Basilicata (Southern Italy

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    Todaro L

    2008-03-01

    Full Text Available A dendroclimatic study on silver fir (Abies alba Mill. was carried out in the Abetina of Ruoti (PZ, Basilicata - southern Italy, a nearly natural mixed Quercus cerris - Silver fir forest. Observations were made on twenty-three large size dominant silver fir trees and dendroecological analyses performed for the period 1866-2007. Results show that late spring/summer precipitations, rather than temperatures, are the most critical factor affecting silver fir growth in this area.

  13. Avaliação agronômica e química de dezessete acessos de erva-cidreira [Lippia alba (Mill. N.E.Brown] - quimiotipo citral, cultivados no Distrito Federal Agronomic and chemical evaluation of seventeen accessions of "erva-cidreira" [Lippia alba (Mill. N.E.Brown] - citral chemotype, cultivated at the Federal District, Brazil

    Directory of Open Access Journals (Sweden)

    H. Jannuzzi

    2011-01-01

    Full Text Available A erva-cidreira [Lippia alba (Mill. N.E.Brown] é uma espécie nativa utilizada como planta medicinal em todo o Brasil. O citral é responsável pela ação sedativa da erva cidreira, sendo um dos principais componentes do óleo essencial. O objetivo deste trabalho foi avaliar o comportamento agronômico, teor e rendimento de óleo essencial e de citral em 17 acessos de L. alba da coleção da Universidade de Brasília - UnB. O experimento foi realizado no período de 19/02/2005 a 18/03/2006, em latossolo vermelho, no Distrito Federal. O delineamento experimental utilizado foi o de blocos ao acaso, com três repetições, contendo três plantas por parcela. Foram avaliados os parâmetros área foliar, comprimento da haste, produção de massa fresca (folhas e hastes, produção de massa foliar seca, teor de óleo essencial e de citral, rendimento estimado de óleo essencial e de citral por planta, além da caracterização do perfil aromático do óleo essencial. Os acessos L.41 (0,75%, L.45 (0,66% e L.08 (0,62% apresentaram os maiores teores de óleo essencial. O acesso L.45 (1,32 g pl-1 apresentou o maior rendimento de óleo, seguido dos acessos L.47 (0,73 g pl-1, L.41 (0,67 g pl-1, L.34 (0,67 g pl-1 e L.33 (0,62 g pl-1. Os acessos apresentaram teores de citral variando de 51,7% (L.34 a 75,1% (L.09, com média de 63,6% e predominância do isômero geranial (36,4% sobre o neral (27,8%. O acesso L.45 (0,83 g pl-1 apresentou o maior rendimento de citral. Treze acessos apresentaram o quimiotipo citral; três o quimiotipo citral-limoneno e apenas um apresentou o quimiotipo citral-mirceno. Os resultados evidenciam o potencial de produção de citral do acesso L.45, o qual poderá ser utilizado para melhorar a qualidade da matéria prima de erva-cidreira utilizada nos programas de fitoterapia no país ou em programas de melhoramento genético para esta finalidade."Erva-cidreira" [Lippia alba (Mill. N.E.Brown] is a native species used as a medicinal

  14. 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.

  15. 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.

  16. HMG-CoA reductase inhibitory activity and phytocomponent investigation of Basella alba leaf extract as a treatment for hypercholesterolemia

    Directory of Open Access Journals (Sweden)

    Baskaran G

    2015-01-01

    Full Text Available Gunasekaran Baskaran,1 Shamala Salvamani,1 Siti Aqlima Ahmad,1 Noor Azmi Shaharuddin,1 Parveen Devi Pattiram,2 Mohd Yunus Shukor1 1Department of Biochemistry, Faculty of Biotechnology and Biomolecular Sciences, 2Department of Food Technology, Faculty of Food Science and Technology, Universiti Putra Malaysia, Selangor, Malaysia Abstract: The enzyme 3-hydroxy-3-methyl-glutaryl-coenzyme A (HMG-CoA reductase is the key enzyme of the mevalonate pathway that produces cholesterol. Inhibition of HMG-CoA reductase reduces cholesterol biosynthesis in the liver. Synthetic drugs, statins, are commonly used for the treatment of hypercholesterolemia. Due to the side effects of statins, natural HMG-CoA reductase inhibitors of plant origin are needed. In this study, 25 medicinal plant methanol extracts were screened for anti-HMG-CoA reductase activity. Basella alba leaf extract showed the highest inhibitory effect at about 74%. Thus, B. alba was examined in order to investigate its phytochemical components. Gas chromatography with tandem mass spectrometry and reversed phase high-performance liquid chromatography analysis revealed the presence of phenol 2,6-bis(1,1-dimethylethyl, 1-heptatriacotanol, oleic acid, eicosyl ester, naringin, apigenin, luteolin, ascorbic acid, and a-tocopherol, which have been reported to possess antihypercholesterolemic effects. Further investigation of in vivo models should be performed in order to confirm its potential as an alternative treatment for hypercholesterolemia and related cardiovascular diseases. Keywords: HMG-CoA reductase, Basella alba, phytochemical, GC-MS/MS, RP-HPLC, hypercholesterolemia

  17. Life history and vertical distribution of the mesopelagic fish Cyclothone alba (family Gonostomatidae) in Sagami Bay, Central Japan

    Science.gov (United States)

    Miya, Masaki; Nemoto, Takahisa

    1986-08-01

    Life history and vertical distribution of the mesopelagic fish Cyclothone alba (family Gonostomatidae) are described on the basis of over 4000 specimens taken during a series of 15 cruises from December 1982 to December 1984 at a station near the center of Sagami Bay, Central Japan. C. alba does not undertake diel vertical migrations, being concentrated in the mesopelagic zone between 300 and 500 m, with peak abundance at 350 m both day and night. Spawning occurs mainly during the late spring and summer months in Sagami Bay. C. alba is semelparous, releasing about 200-650 eggs at the end of its life. Duration of the egg and larval stages is estimated to be about 2-3 months. Many males and some females mature at 1 year, and all individuals mature by 2 years of age. Sexual dimorphism in smaller males and larger females results from an earlier decline of growth rate in males: on the average, males reach 17.5 mm SL (standard length) in 1 year and 21 mm SL in 2 years, whereas females reach 19 mm SL in 1 year and 26 mm SL in 2 years. It is suggested that such precocious maturation, together with its small larvalized form, is attained through progenesis.

  18. Potential for phytoextraction of copper by Sinapis alba and Festuca rubra cv. Merlin grown hydroponically and in vineyard soils.

    Science.gov (United States)

    Malagoli, Mario; Rossignolo, Virginia; Salvalaggio, Nico; Schiavon, Michela

    2014-03-01

    The extensive use of copper-bearing fungicides in vineyards is responsible for the accumulation of copper (Cu) in soils. Grass species able to accumulate Cu could be cultivated in the vineyard inter-rows for copper phytoextraction. In this study, the capacity of Festuca rubra cv Merlin and Sinapis alba to tolerate and accumulate copper (Cu) was first investigated in a hydroponic system without the interference of soil chemical-physical properties. After the amendment of Cu (5 or 10 mg Cu l-(1)) to nutrient solution, shoot Cu concentration in F. rubra increased up to 108.63 mg Cu kg(-1) DW, more than three times higher than in S. alba (31.56 mg Cu kg(-1) DW). The relationship between Cu concentration in plants and external Cu was dose-dependent and species specific. Results obtained from the hydroponic experiment were confirmed by growing plants in pots containing soil collected from six Italian vineyards. The content of soil organic matter was crucial to enhance Cu tolerance and accumulation in the shoot tissues of both plant species. Although S. alba produced more biomass than F. rubra in most soils, F. rubra accumulated significantly more Cu (up to threefold to fourfold) in the shoots. Given these results, we recommended that F. rubra cv Merlin could be cultivated in the vineyard rows to reduce excess Cu in vineyard soils. PMID:24234763

  19. Evaluation of hydro-alcoholic extract of Eclipta alba for its multidrug resistance reversal potential: an in vitro study.

    Science.gov (United States)

    Chaudhary, Harshita; Jena, Prasant Kumar; Seshadri, Sriram

    2013-01-01

    The development of multidrug resistance (MDR) causes problems in the chemotherapy of human cancer. The present study was designed to evaluate and establish the role of Eclipta alba as MDR reversal agent using multidrug resistant hepatocellular carcinoma cell line (DR-HepG2). To develop DR-HepG2, hepatocellular carcinoma cell line (HepG2) was transfected with 2-Acetylaminofluorene (AAF) and Aflatoxin B1 (AFB). Cytotoxic effects of the Eclipta alba hydroalcoholic extract (EAE) and standard anti-ancer drug Doxorubicin (DOX) were determined in DR-HepG2 and the parental cells HepG2 using MTT assay. The expression level of MDR1 gene and P-glycoprotein (P-gp) level was analyzed by RT-PCR and western blotting. From the present investigation, it was found that EAE (10 and 20 μg/ml) could significantly inhibit cell proliferation in DR-HepG2 whereas DOX (0.5 μg/ml) could not because of enhancement effect of MDR1/P-gp. This study demonstrated for the first time the antiproliferative activities of EAE in multidrug resistant DR-HepG2 cells. The findings revealed that Eclipta alba components are effective inhibitors of MDR1/P-gp. PMID:23859045

  20. Eco-geographical variation in the diet of the Barn Owl (Tyto alba in mountainous areas of France

    Directory of Open Access Journals (Sweden)

    Halliez Guillaume

    2015-12-01

    Full Text Available Because of the worldwide distribution of the Barn Owl (Tyto alba and the easily way to find its pellets, it is often used to diet studies. To investigate the eco-geographical impact of mountainous areas on its diet, we conducted studies in the Jura, Alpes, Central and Pyrénées mountains and we also did pellet analysis from 8 sites in the Jura mountains. Analysis of the tooth and skull content of pellets allowed us to draw up two types of change in the diet of Tyto alba in correlation with mountain elevation. The first one concerns the Jura, Alpes and Central mountains, where the diversity of the diet declines with the increase in elevation. The second one concerns the Pyrénées mountains, where there is no change in the diversity of the diet, perhaps because of the higher diversity of small mammals caused by mediterranean influence. Thus, it seems that elevation cau ses a decrease in diet diversity of Tyto alba in continental mountains (Jura, Alpes and Central mountains probably because of more homogeneous landscapes dedicated to grass production. However, in Mediterranean mountains (Pyrénées, a more diversified small mammal guild provides a constant level of diet diversity.

  1. Hepatoprotective Effect of Aqueous Acetone Extract of Sida alba L. (Malvaceae Against Alcohol Induced Liver Damage in albinos Wistar Rats

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    K. Konaté

    2011-02-01

    Full Text Available The present study was conducted to evaluate the hepatoprotective effects of aqueous acetone extract of Sida alba. (Malvaceae an herbal plant used in Burkina Faso to treat traditionally hepatics affections in albinos Wistar rats. Animals were treated by gavage during 28 days with different doses of aqueous acetone extracts of Sida alba. (75, 100, 150 mg/kg suspended in 35% ethanol. Control groups received alcohol 35% and water. In vivo administration of 35% ethano l for 28 days results an activity of liver marker enzymes (AST, ALT, ALP, glucose, triglycerides, total cholesterol, total bilirubin and direct bilirubin in serum as compared with rats which received water (control water. However, administrations of 35% ethanol along with aqueous acetone extract decreased the activities of liver markers enzyme in serum comparatively to the control water group (p0.05 and p<0.05. This study revealed that Sida alba presents a hepatoprotective potential and this plant could be traditionally exploited in the treatment of affection hepatics.

  2. Composición química de la morera (morus alba, para uso en la alimentación animal: densidades y frecuencias de poda

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    Carlos Boschini F.

    2000-01-01

    Full Text Available Composición química de la morera (Morus alba, para uso en la alimentación animal: densidades y frecuencias de poda. El presente trabajo se llevó a cabo en la Estación Experimental de Ganado Lechero “Alfredo Volio Mata”, Cartago, Costa Rica. Las muestras fueron obtenidas de una plantación de morera dividida en tres lotes, con un distanciamiento entre plantas de 60, 90 y 120 cm entre hileras y plantas. Cada parcela se uniformó en dos alturas de poda, 30 y 60 cm sobre el nivel del suelo. Las subparcelas se podaron en forma consecutiva cada 56, 84 y 112 días durante 336 días. Los factores distancia se siembra, altura de poda y frecuencia de corte, influyeron sobre los contenidos químicos de la materia seca. La distancia de siembra y la altura de poda produjeron pequeñas variaciones en la composición de la hojas y en los tallos de la morera. La frecuencia de corte produjo cambios en la composición del las hojas y tallos de la morera; sin embargo, las diferencias en materia seca, proteína, carbohidratos estructurales o en las cenizas totales de las hojas no fueron superiores al 3% entre las frecuencias experimentadas. En el tallo los cambios mayores fueron de un 9% y se produjeron en los contenidos de materia seca, pared celular y en algunos de sus constituyentes estructurales como la celulosa. El número de corte dentro de cada frecuencia influyó de manera significativa sobre las proporciones químicas de hojas y tallos

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

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    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

  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 the

  5. Retinopatia, a imagem como sintoma, o desenho como cicatriz

    OpenAIRE

    Almeida, Paulo Oliveira Freire

    2013-01-01

    Este texto percorre alguma da bibliografia sobre arte, imagem e visão incidindo em curiosidades de relevância variável sob o modo como a representação gráfica revela efeitos sintomáticos, como patologias da retina ou perturbações visuais de origem fisiológica. Essa identidade entre sintoma e imagem, assumida também como metafórica, decorre de um conceito onde a primeira instância do desenho de observação se inscreve na própria superfície da retina como marca de luz no tecido celular. Os exemp...

  6. Análise da cicatrização na Linha Alba com uso de extrato aquoso de Orbignya phalerata (babaçu: estudo controlado em ratos Analysis of healing in the Alba Linea with the use of Orbignya phalerata (babassu water extract: controlled study in rats

    Directory of Open Access Journals (Sweden)

    Sebastião Barreto de Brito Filho

    2006-01-01

    Full Text Available INTRODUÇÃO: O mesocarpo do babaçu (Orbignya phalerata tem sido utilizado em estudos experimentais para verificar a sua ação antiinflamatória. No Maranhão, é muito utilizado como alimento e como remédio popular para cicatrização de ferimentos. OBJETIVO: Avaliar macroscópica, histológica e tensiometricamente, a ação do extrato de Orbygnia phalerata no processo de cicatrização de laparotomias medianas em ratos. MÉTODOS: Quarenta ratos da linhagem Wistar, adultos, machos, foram utilizados em procedimento experimental que consistiu em uma incisão na linha alba e síntese em plano único com pontos separados de fio de polipropileno 5-0. Após esse procedimento comum, os animais foram distribuídos em dois grupos de 20. Ao grupo chamado controle, foi utilizado injeção intraperitoneal, em dose única de 1mL de soro fisiológico para cada quilo de peso. Ao grupo experimento, utilizou-se solução aquosa de babaçu na dose de 50 mg por quilo de peso. Os animais foram acompanhados e mortos após três e sete dias, procedendo-se, a seguir, à análise tensiométrica e histológica. RESULTADOS: O exame macroscópico não mostrou presença de aderências importantes entre a linha alba e os órgãos intra-abdominais nos grupos de estudo. A avaliação histológica mostrou efeito marginalmente significativo (p=0,086 para inflamação aguda nos grupos controle e experimento de três dias e efeito significativo (p=0,003 para a reação gigantocelular (p=0,003. Diferença significativa (p-=0,023 foi observada para inflamação aguda no grupos controle experimento de sete dias. Na análise intra-grupo (controle três e sete, foi observado efeito marginalmente significativo (p=0,094 e p=0,05 respectivamente para as variáveis inflamação aguda e crônica. Na análise somente entre os grupos experimentos, as variáveis reação gigantocelular (0,002 e colagenização (0,016 apresentaram resultado significativo. A avaliação tensiom

  7. La indumentaria como lenguaje performativo

    OpenAIRE

    Mizrahi, Alejandra

    2013-01-01

    Todo lo que existe sobre la faz de la tierra es susceptible de ser visto como un lenguaje, con una sintaxis, una semántica, una pragmática y una gramática. La indumentaria, como lenguaje que es, se conforma como un tipo de lengua que al ser enunciada -vestida- no sólo dice cosas sino que las hace. Si pensamos en este modo de hacer con el vestido, nos estamos remitiendo infaliblemente a la filosofía del lenguaje ordinario de John L. Austin y a la teoría del género performativo de Judith Butler...

  8. Emplacement of lava flow fields: Application of terrestrial studies to Alba Patera, Mars

    International Nuclear Information System (INIS)

    Morphological data are at present the major source of information for extraterrestrial lavas. Effusion conditions must therefore be inferred from the final shapes of flow fields, generally using terrestrial lavas as analogues and so presupposing similar emplacement regimes on Earth and other planets. Studies of terrestrial lavas suggest that the overall development of flow fields is systematic and that a general, normalized relation can be established linking the final dimensions of a flow field (specifically, average thickness and the ratio of maximum width to maximum length) to underlying slope and eruption duration, independent of explicit knowledge of discharge rate, gravitational acceleration, lava density, and rheology. This relation is applied to lavas on the Martian volcano Alba Patera, on which two distinct planimetric types of lava flow fields are identified, and eruption durations, average discharge rates, and average velocities are obtained. Imposing the constraint of a terrestrial emplacement regime, the model yields internally consistent results for subliquidus lavas and suggests that, at least for basaltic-basaltic andesitic compositions, the essential conditions of eruption may have been similar to those currently observed on Earth

  9. Phenotypic and Transcriptomic Analyses of Autotetraploid and Diploid Mulberry (Morus alba L.

    Directory of Open Access Journals (Sweden)

    Fanwei Dai

    2015-09-01

    Full Text Available Autopolyploid plants and their organs are often larger than their diploid counterparts, which makes them attractive to plant breeders. Mulberry (Morus alba L. is an important commercial woody plant in many tropical and subtropical areas. In this study, we obtained a series of autotetraploid mulberry plants resulting from a colchicine treatment. To evaluate the effects of genome duplications in mulberry, we compared the phenotypes and transcriptomes of autotetraploid and diploid mulberry trees. In the autotetraploids, the height, breast-height diameter, leaf size, and fruit size were larger than those of diploids. Transcriptome data revealed that of 21,229 expressed genes only 609 (2.87% were differentially expressed between diploids and autotetraploids. Among them, 30 genes were associated with the biosynthesis and signal transduction of plant hormones, including cytokinin, gibberellins, ethylene, and auxin. In addition, 41 differentially expressed genes were involved in photosynthesis. These results enhance our understanding of the variations that occur in mulberry autotetraploids and will benefit future breeding work.

  10. White poplar (Populus alba) as a biomonitor of trace elements in contaminated riparian forests

    International Nuclear Information System (INIS)

    Trees can be used to monitor the level of pollution of trace elements in the soil and atmosphere. In this paper, we surveyed the content of eight trace elements (As, Cd, Cu, Fe, Mn, Ni, Pb and Zn) in leaves and stems of white poplar (Populus alba) trees. We selected 25 trees in the riparian forest of the Guadiamar River (S. Spain), one year after this area was contaminated by a mine spill, and 10 trees in non-affected sites. The spill-affected soils had significantly higher levels of available cadmium (mean of 1.25 mg kg-1), zinc (117 mg kg-1), lead (63.3 mg kg-1), copper (58.0 mg kg-1) and arsenic (1.70 mg kg-1), than non-affected sites. The concentration of trace element in poplar leaves was positively and significantly correlated with the soil availability for cadmium and zinc, and to a lesser extent for arsenic (log-log relationship). Thus, poplar leaves could be used as biomonitors for soil pollution of Cd and Zn, and moderately for As

  11. 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.

  12. MECHANICAL PROPERTIES OF POPLAR WOOD (POPULUS ALBA DRIED BY THREE KILN DRYING SCHEDULES

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    Mahdi Shahverdi,

    2012-01-01

    Full Text Available The influence of three drying schedules on the selected mechanical properties of poplar wood (Populus alba L. was evaluated in terms of suitability for structural applications. For this purpose, 70 mm-thick poplar lumber was conventionally dried by three different moisture content based schedules of T5-D2, T5-D4, and T5-D6. In these schedules, the wet bulb depression was changed as a means of increasing of the drying intensity. After drying, the mechanical properties of the lumber, including bending properties (MOE and MOR, toughness, shear strength parallel to grain, and tensile strength perpendicular to grain, were measured. Results revealed that the severe drying schedule (T5-D6 caused higher reductions in the mechanical properties of the dried boards, particularly the MOE and MOR. Furthermore, toughness and tensile strength perpendicular to grain were not affected by the increasing of the wet bulb depression. The influence of all the three adopted schedules on the mechanical properties was evaluated using the drying rate, final moisture content gradient, and qualitative characteristics of the dried boards.

  13. Focusing and defocusing using mechanically corrected mirrors at the MX beamline at Alba

    International Nuclear Information System (INIS)

    A practical limitation of X-ray focusing mirrors is that, while providing nice gaussian photon distributions at the focal plane, they usually produce inhomogeneous beam profiles upon defocusing that are caused by the mirror polishing errors. This can become a limitation in order to match the beam size with the sample dimensions, as the sample is not uniformly illuminated. We outline a method to achieve well shaped unfocused beams that has been successfully proven at BL13-XALOC, the macromolecular crystallography beamline at the ALBA synchrotron. As received from the manufacturer, the mirrors had rms slope errors of 180 nrad rms (vertically focusing mirror, VFM) and 210 nrad rms (horizontally focusing mirror, HFM). Ray tracing simulations suggested that pronounced stripes arising from the surface waviness would appear upon defocusing. By using the elastic beam theory to model the deformations and calculating the necessary correcting forces exerted by a few mechanical actuators that were installed in the mirror mechanical holders, we were able to reduce the slope errors of the mirrors to 55 nrad rms (VFM) and 83 nrad rms (HFM). The corrected mirrors were installed at the beamline and they were tested with the X-ray beam from the undulator source.

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

    Directory of Open Access Journals (Sweden)

    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.

  15. 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. PMID:26213081

  16. Degradation of exogenous caffeine by Populus alba and its effects on endogenous caffeine metabolism.

    Science.gov (United States)

    Pierattini, Erika C; Francini, Alessandra; Raffaelli, Andrea; Sebastiani, Luca

    2016-04-01

    This is the first study reporting the presence of endogenous caffeine, theobromine, and theophylline in all organs of poplar plants. Liquid chromatography coupled with tandem mass spectrometry (LC-MS/MS) was used in order to evaluate the uptake, translocation, and metabolism of caffeine-(trimethyl-(13)C) in Populus alba L. Villafranca clone grown in hydroponic conditions. We investigated the remediation of caffeine since it is one of the most widely consumed drugs and it is frequently detected in wastewater treatment plant effluents, surface water, and groundwater worldwide. Our results demonstrated that poplar can absorb and degrade exogenous caffeine without negative effects on plant health. Data showed that concentrations of all endogenous compounds varied depending on caffeine-(trimethyl-(13)C) treatments. In particular, in control conditions, endogenous caffeine, theobromine, and theophylline were mainly distributed in roots. On the other hand, once caffeine-(trimethyl-(13)C) was provided, this compound and its dimethy-(13)C metabolites are mainly localized at leaf level. In conclusion, our results support the possible use of Villafranca clone in association with other water treatment systems in order to complete the process of caffeine remediation. PMID:26681326

  17. Rapid discrimination of geographical origin and evaluation of antioxidant activity of Salvia miltiorrhiza var. alba by Fourier transform near infrared spectroscopy

    Science.gov (United States)

    Duan, Xiaoju; Zhang, Danlu; Nie, Lei; Zang, Hengchang

    2014-03-01

    Radix Salvia miltiorrhiza Bge. var. alba C.Y. Wu and H.W. Li and Radix S. miltrorrhiza belong to the same genus. S. miltiorrhiza var. alba has a unique effectiveness for thromboangiitis besides therapeutical efficay of S. miltrorrhiza. It exhibits antioxidant activity (AA), while its quality and efficacy also vary with geographic locations. Therefore, a rapid and nondestructive method based on Fourier transform near infrared spectroscopy (FT-NIRS) was developed for discrimination of geographical origin and evaluation of AA of S. miltiorrhiza var. alba. The discrimination of geographical origin was achieved by using discriminant analysis and the accuracy was 100%. Partial least squares (PLS) regression was employed to establish the model for evaluation of AA by NIRS. The spectral regions were selected by interval PLS (i-PLS) method. Different pre-treated methods were compared for the spectral pre-processing. The final optimal results of PLS model showed that correlation coefficients in the calibration set (Rc) and the prediction set (Rp), root mean square error of prediction (RMSEP) and residual prediction deviation (RPD) were 0.974, 0.950, 0.163 mg mL-1 and 2.66, respectively. The results demonstrated that NIRs combined with chemometric methods could be a rapid and nondestructive tool to discriminate geographical origin and evaluate AA of S. miltiorrhiza var. alba. The developed NIRS method might have a potential application to high-throughput screening of a great number of raw S. miltiorrhiza var. alba samples for AA.

  18. 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.

  19. CARACTERIZACIÓN DE BACTERIAS PROBIÓTICAS AISLADAS DEL INTESTINO GRUESO DE CERDOS COMO ALTERNATIVA AL USO DE ANTIBIÓTICOS

    Directory of Open Access Journals (Sweden)

    Henry Jurado G

    2009-08-01

    Full Text Available Objetivos. Caracterizar bacterias ácido lácticas probióticas aisladas del intestino grueso de cerdos adultos como posible alternativa al uso de antibióticos. Materiales y métodos. Se incluyeron muestras de intestino grueso de 20 cerdos adultos, para el aislamiento de bacterias lácticas (BAL. La caracterización de los parámetros bioquímicos-fisiológicos de las BAL contemplo la evaluación del pH del fermento, determinación de ácidos orgánicos por HPLC y detección de isómeros de ácido láctico. Los procedimientos microbiológicos evaluaron la capacidad de inhibición del crecimiento de patógenos y la actividad antagónica del probiótico vs antibiótico con su interacción competitiva. Se utilizaron pruebas API CHL 50 para la identificación de las BAL que se complementaron con la producción de gas, actividad de catalasa y viabilidad a diferentes concentraciones de sales biliares y temperaturas. Resultados. El plan de análisis permitió seleccionar dos aislados que se identificaron como: Lactobacillus plantarum 1 H1 y Lb. plantarum 1 H2. Las pruebas microbiológicas evidenciaron que las BAL seleccionadas inhibieron principalmente los enteropatógenos: Escherichia coli, Salmonella typhimurium y Clostridium perfringens. Las pruebas bioquímicas fueron compatibles con el género Lactobacillus, mostrando el siguiente perfil: Catalasa negativas; no productoras de gas; productoras de isómeros DL; resistentes a sales biliares y pH óptimo de crecimiento 3.5 a 38oC. Conclusiones. Los dos aislados de Lactobacillus plantarum 1 reunieron las características para el uso potencial como probióticos. Se recomienda su uso como complemento de terapias con antibióticos y en la elaboración de inóculos para aplicación en raciones alimenticias de lechones destetos, sin embargo, estudios complementarios se requieren para evaluar el efecto directo del probiótico como sustituto del uso de antibióticos in vivo.

  20. Fungitoxicty of Bidens pilosa, Thymus vulgaris, Lippia alba and Rosmarinus officinalis in the in vitro development of phytophatogens fungi / Fungitoxidade de Bidens pilosa, Thymus vulgaris, Lippia alba e Rosmarinus officinalis no desenvolvimento in vitro de fungos fitopatogênicos

    Directory of Open Access Journals (Sweden)

    José Renato Stangarlin

    2009-07-01

    Full Text Available The fungitoxicity of aqueous crude extracts (ACE of Bidens pilosa, Thymus vulgaris, Lippia alba and Rosmarinus officinalis was evaluated in vitro on development of Alternaria alternata, Colletotrichum graminicola, Rhizoctonia solani and Sclerotium rolfsii. The active ACE were incorporated to Potato- Dextrose-Agar (PDA alone or in mixture, at 0%, 1%, 5%, 10%, 15%, 25% and 50% concentrations. Measurement in fungal colonies was taken daily until the control treatment covered 2/3 of the culture media. The mixtures of T. vulgaris with B. pilosa did not have positive effect because the ACE of B. pilosa did not reduce the fungal growth of R. solani and in mixture inhibited the effect ACE of T. vulgaris. However, the mixture of ACEs of R. officinalis and L. alba produced better results than isolated ACEs, with 60% of growth inhibition of A. alternata. The ACE of T. vulgaris inhibited the growth of C. graminicola at 97%. The results show that ACEs have significative fungitoxicity in the evaluated phythopathogens.Avaliou-se in vitro, a atividade fungitóxica dos extratos brutos aquosos (EBA em diferentes concentrações isolados e em misturas de Bidens pilosa, Thymus vulgaris, Lippia alba e Rosmarinus officinalis no desenvolvimento dos fungos Alternaria alternata, Colletotrichum graminicola, Rhizoctonia solani e Sclerotium rolfsii. A avaliação foi realizada incorporando os extratos brutos aquosos (EBAs ao meio BDA isolados e em mistura, nas concentrações 0%, 1%, 5%, 10%, 15%, 25% e 50%. Foram feitas medições diárias das colônias fúngicas até o momento em o tratamento controle cobriu 2/3 da superfície do meio de cultura. Verificou-se que a mistura de T. vulgaris com B. pilosa não teve efeito positivo, pois o EBA isolado de B. pilosa não reduziu o crescimento do fungo R. solani e em mistura reduziu o efeito do EBA de T. vulgaris. Porém, o EBAs de R. officinalis e L. alba em mistura levaram a melhores resultados, reduzindo em até 60% o

  1. 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.

  2. ¿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.

  3. Antioxidant capacity and HPLC-DAD-MS profiling of Chilean peumo (Cryptocarya alba) fruits and comparison with German peumo (Crataegus monogyna) from southern Chile.

    Science.gov (United States)

    Simirgiotis, Mario J

    2013-01-01

    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). PMID:23385342

  4. La dieta de la lechuza (Tyto alba (Aves: Strigiformes en hábitats naturales y antropogénicos de la región central de Cuba Diet of Barn Owl (Tyto alba (Aves: Strigiformes in natural and anthropogenic habitat in central Cuba

    Directory of Open Access Journals (Sweden)

    Abel Hernández-Muñoz

    2011-03-01

    Full Text Available Para determinar los hábitos tróficos de la lechuza, Tyto alba, se analizaron 1232 egagrópilas recolectadas entre 1994 y 2001 en 24 localidades de la región central de Cuba. Se encontraron 3943 presas; los roedores exóticos (Mus musculus y Rattus spp. fueron las presas dominantes y representaron 80% del total. Otros tipos de presas fueron de menor frecuencia; por ejemplo, insectos (6.1%, murciélagos (5%, anfibios (4.8%, aves (3.6% y reptiles (0.2%. Se agruparon las localidades de recolecta de egagrópilas en 2 categorías de hábitat: antropogénicos y naturales, para explorar el efecto de los disturbios antrópicos en la dieta de la lechuza. Contrario a lo esperado, no se encontró variación significativa en el índice de amplitud trófica de Levins (Bantropogénicos= 1.32 ± 0.3 vs Bnaturales = 1.38 ± 0.4. La composición de la dieta en ambos hábitats no difiere, al menos en la proporción de las diferentes clases, aunque existe la tendencia a depredar más aves en hábitats naturales que en sitios perturbados donde los insectos son más frecuentes. Los resultados sugieren que tanto en hábitats antropogénicos como naturales, las lechuzas se comportan como depredadores efectivos de las poblaciones de roedores múridos introducidos.To determine food habits of Barn Owl, Tyto alba, we analyzed 1232 pellets collected from 24 localities in central Cuba from 1994 to 2001. The pellets yielded 3943 prey items, with introduced rodents (Mus musculus and Rattus spp. being the primary prey, accounting for 80% of items in the diet. Other prey classes were of minor frequency; e.g., insects (6.1%, bats (5%, amphibians (4.8%, birds (3.6%, and reptiles (0.2%.We grouped pellet collection localities into 2 habitat categories: "anthropogenic" and "natural," to explore the effect of anthropogenic disturbance on the diet Barn Owl. Contrary to our expectation, we found no significant difference in the Levin's niche-breadth index (B, calculated for the

  5. Past and future evolution of Abies alba forests in Europe - comparison of a dynamic vegetation model with palaeo data and observations.

    Science.gov (United States)

    Ruosch, Melanie; Spahni, Renato; Joos, Fortunat; Henne, Paul D; van der Knaap, Willem O; Tinner, Willy

    2016-02-01

    Information on how species distributions and ecosystem services are impacted by anthropogenic climate change is important for adaptation planning. Palaeo data suggest that Abies alba formed forests under significantly warmer-than-present conditions in Europe and might be a native substitute for widespread drought-sensitive temperate and boreal tree species such as beech (Fagus sylvatica) and spruce (Picea abies) under future global warming conditions. Here, we combine pollen and macrofossil data, modern observations, and results from transient simulations with the LPX-Bern dynamic global vegetation model to assess past and future distributions of A. alba in Europe. LPX-Bern is forced with climate anomalies from a run over the past 21 000 years with the Community Earth System Model, modern climatology, and with 21st-century multimodel ensemble results for the high-emission RCP8.5 and the stringent mitigation RCP2.6 pathway. The simulated distribution for present climate encompasses the modern range of A. alba, with the model exceeding the present distribution in north-western and southern Europe. Mid-Holocene pollen data and model results agree for southern Europe, suggesting that at present, human impacts suppress the distribution in southern Europe. Pollen and model results both show range expansion starting during the Bølling-Allerød warm period, interrupted by the Younger Dryas cold, and resuming during the Holocene. The distribution of A. alba expands to the north-east in all future scenarios, whereas the potential (currently unrealized) range would be substantially reduced in southern Europe under RCP8.5. A. alba maintains its current range in central Europe despite competition by other thermophilous tree species. Our combined palaeoecological and model evidence suggest that A. alba may ensure important ecosystem services including stand and slope stability, infrastructure protection, and carbon sequestration under significantly warmer

  6. Temporal effects on the composition of a population of Sinorhizobium meliloti associated with Medicago sativa and Melilotus alba.

    Science.gov (United States)

    Bromfield, E S; Butler, G; Barran, L R

    2001-06-01

    An assessment was made of the impact of temporal separation on the composition of a population of Sinorhizobium meliloti associated with Medicago sativa (alfalfa) and Melilotus alba (sweet clover) grown at a single site that had no known history of alfalfa cultivation. Root nodules were sampled on six occasions over two seasons, and a total of 1620 isolates of S. meliloti were characterized on the basis of phage sensitivity using 16 typing phages. Plant infection tests indicated that symbiotic S. meliloti were deficient in the soil at the time of planting and that these bacteria were present at low density during the first season (soil); in the second season numbers increased markedly to about 10(5)/g of soil. Overall, 37 and 51 phage types, respectively, were encountered among the nodule isolates from M. sativa and M. alba. The data indicate significant temporal shifts in the frequency and diversity of types associated with the two legume species. Apparent temporal variation with respect to the frequency of types appeared largely unpredictable and was not attributable to any one sampling time. The results indicate an apparent reduction in phenotypic diversity over the course of the experiment. Differential host plant selection of specific types with respect to nodule occupancy was indicated by significant interactions between legume species and either the frequency or diversity of phage types. Isolates from M. sativa that were resistant to lysis by all typing phages (type 14) were unusual in that they were predominant on this host at all sampling times (between 53% and 82% nodule occupancy) and were relatively homogeneous on the basis of DNA hybridization with 98% of the isolates analysed sharing the same nod EFG hybridization profile. In contrast, those isolates from M. alba comprising type 14 were encountered at low total frequency (2%) and were genetically heterogeneous on the basis of Southern hybridization. The implications of the observed temporal and host

  7. Participation of the GABAergic system in the anesthetic effect of Lippia alba (Mill.) N.E. Brown essential oil

    International Nuclear Information System (INIS)

    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 GABAA 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 GABAA 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

  8. Composition and antimicrobial activity of essential oils of Artemisia judaica, A. herba-alba and A. arborescens from Libya

    Directory of Open Access Journals (Sweden)

    Janaćković Peđa

    2015-01-01

    Full Text Available The essential oils obtained by hydrodistillation from the aerial parts of Artemisia judaica L., Artemisia herba-alba Asso. and Artemisia arborescens L. (cultivated from Libya, were analyzed by GC and GC-MS. The antimicrobial properties were determined using the broth microdilution method against eight bacterial species: Bacillus cereus (clinical isolate, Micrococcus flavus (ATCC10240, Listeria monocytogenes (NCTC7973, Staphylococcus aureus (ATCC6538, Escherichia coli (ATCC35210, Pseudomonas aeruginosa (ATCC27853, Salmonella typhimurium (ATCC13311, Enterobacter cloacae (human isolates and eight fungal species: Aspergillus niger (ATCC6275, A. ochraceus (ATCC12066, A. versicolor (ATCC11730, A. fumigatus (ATCC1022, Penicillium ochrochloron (ATCC9112, P. funiculosum (ATCC10509, Trichoderma viride (IAM5061 and Candida albicans (human isolate. The major constituents of A. arborescens oil were sesquiterpene hydrocarbons (47.4%. Oxygenated monoterpenes were the dominant constituents in the A. judaica and A. herba-alba oils (54.2% and 77.3%, respectively. Camphor (24.7% and chamazulene (20.9% were the major components in the essential oil of A. arborescens, chrysanthenone (20.8%, cis-chrysanthenyl acetate (17.6% and cis-thujone (13.6% dominated in the A. herba-alba oil, and the major constituents in the A. judaica oil were piperitone (30.21% and cis-chrysanthenol (9.1%. The best antimicrobial activity was obtained for A. judaica oil and the lowest effect was noticed in A. arborescens oil. The effect of the tested oils was higher against Gram (+ than Gram (- bacteria. All three oils showed the best antibacterial activity against Listeria monocytogenes and the lowest against Pseudomonas aeruginosa, Escherichia coli, Enterobacter cloacae, compared to streptomycin and ampicillin. All three oils showed better antifungal activities than ketoconazole, except A. arborescens oil against Aspergillus niger. [Projekat Ministarstv nauke Republike Srbije, br. 173029

  9. 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.

  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. La descontaminación de las aguas del lago Izabal en Guatemala a través de la extracción de la planta Hydrilla verticillata (L.F Royle y su uso como sustrato alternativo para la producción de plántulas de chile pimiento en invernadero

    Directory of Open Access Journals (Sweden)

    Iván Dimitri Santos Castillo

    2010-01-01

    Full Text Available Se caracterizaron las principales propiedades físicas, químicas y biológicas de sustratos elaborados a base de residuos de hydrilla verticillata y su efecto sobre la germinación y desarrollo durante la fase de plántula de semillas de chile pimiento (variedad tropical irazú mejorado. Al analizar los resultados obtenidos tales como agua fácilmente aprovechable, capacidad de aereación, PH, porciento de germinación, germinación acumulada ( 24 DDS, altura de la planta (cm, diámetro del tallo (cm, peso fresco de la parte aérea y sistema radical (g, materia seca de la parte aérea y radical ( % , todo ello 50 días después de siembra (50 DDS, se obtiene que el mejor tratamiento bajo las condiciones y metodologías utilizadas es el N0 12 (H30-85-15, o sea, 85% de hydrilla con 30 días de compostaje + 15 % de perlita y se recomienda como sustituto alternativo del sustrato comercial (turba de sphagnum para la producción de plántulas de chile pimiento en pilones y con ello dar uso productivo a esta planta contaminante de los lagos de Guatemala.

  12. Catalytic and biological activities of green silver nanoparticles synthesized from Plumeria alba (frangipani) flower extract.

    Science.gov (United States)

    Mata, Rani; Reddy Nakkala, Jayachandra; Rani Sadras, Sudha

    2015-06-01

    Herein, we report the green synthesis of silver nanoparticles using Plumeria alba (frangipani) flower extract (FFE) and their biological applications. The formation of frangipani silver nanoparticles (FSNPs) was confirmed by UV-visible spectroscopy and characterized by DLS particle size analyzer, SEM/EDAX, FTIR, TGA/DSC and XRD. The synthesized spherical FSNPs were found to be 36.19nm in size as determined by DLS particle size analyzer. EDAX data and XRD pattern of FSNPs confirmed the presence and face-centered cubic (fcc) phase structure of silver. The bioactive groups C-C and C-N present in FFE were involved in the formation of FSNPs as identified by FTIR analysis. FSNPs exhibited powerful catalytic activity by reducing 4-nitrophenol to 4-aminophenol within 8min and the other organic dyes namely methylene blue and ethidium bromide were moderately degraded. Biological activities of FSNPs are evaluated by means of antioxidant, antibacterial and cytotoxic effect. Antioxidant potential of FSNPs was assessed by various in vitro assays in which they exhibited moderate antioxidant activity. The antibacterial effect of FSNPs was tested in two different pathogenic bacterial strains and their bacteriostatic effect was confirmed by growth kinetic study in Escherichia coli. The cytotoxic effect of FSNPs in COLO 205 was analyzed by MTT assay and the IC50 concentration was found at 5.5 and 4μg/ml respectively after 24 and 48h of incubation. Cytotoxic effect of FSNPs in COLO 205 cells was associated with the loss of membrane integrity and chromatin condensation which might have played a crucial role in the induction of apoptosis as evidenced in AO/EB staining. PMID:25842128

  13. Hematologic and plasma biochemistry reference intervals of healthy adult barn owls (Tyto alba).

    Science.gov (United States)

    Szabo, Zoltan; Klein, Akos; Jakab, Csaba

    2014-06-01

    Hematologic and plasma biochemistry parameters of barn owls (Tyto alba) were studied in collaboration by the Exotic Division of the Faculty of Veterinary Science of the Szent Istvan University and the Eötvös Loránd University, both in Budapest, Hungary. Blood samples were taken from a total of 42 adult barn owls kept in zoos and bird repatriation stations. The following quantitative and qualitative hematologic values were determined: packed cell volume, 46.2 +/- 4%; hemoglobin concentration, 107 +/- 15 g/L; red blood cell count, 3.2 +/- 0.4 x 10(12)/L; white blood cell count, 13.7 +/- 2.7 x 10(9)/L; heterophils, 56.5 +/- 11.5% (7.8 +/- 2 x 10(9)/L); lymphocytes, 40.3 +/- 10.9% (5.5 +/- 1.9 x 10(9)/L); monocytes, 1.8 +/- 2.1% (0.3 +/- 0.3 x 10(9)/ L); eosinophils, 1 +/- 1% (0.1 +/- 0.1 x 10(9)/L); and basophils, 0.6 +/- 0.5% (0.1 +/- 0.1 x 10(9)/L). The following plasma biochemistry values also were determined: aspartate aminotransferase, 272 +/- 43 U/L; L-gamma-glutamyltransferase, 9.5 +/- 4.7 U/L; lipase, 31.7 +/- 11.1 U/L; creatine kinase, 2228 +/- 578 U/L; lactate dehydrogenase, 1702 +/- 475 U/L; alkaline phosphatase, 358 +/- 197 U/L; amylase, 563 +/- 114 U/L; glutamate dehydrogenase, 7.5 +/- 2.5 U/L; total protein, 30.6 +/- 5.3 g/L; uric acid, 428 +/- 102 micromol/L; and bile acids, 43 +/- 18 micromol/L. These results provide reliable reference values for the clinical interpretation of hematologic and plasma biochemistry results for the species. PMID:25055626

  14. Morphological and Histo-Anatomical Study of Bryonia alba L. (Cucurbitaceae

    Directory of Open Access Journals (Sweden)

    Lavinia M. RUS

    2015-04-01

    Full Text Available The purpose of this study consisted in the identification of the macroscopic and microscopic characters of the vegetative and reproductive organs of Bryonia alba L., by the analysis of vegetal material, both integral and as powder. Optical microscopy was used to reveal the anatomical structure of the vegetative (root, stem, tendrils, leaves and reproductive (ovary, male flower petals organs. Histo-anatomical details were highlighted by coloration with an original combination of reagents for the double coloration of cellulose and lignin. Scanning electronic microscopy (SEM and stereomicroscopy led to the elucidation of the structure of tector and secretory trichomes on the inferior epidermis of the leaf. Micrographic analysis of the powder obtained from aerial parts revealed segments of each organ (e.g. stomata, trichomes and confirmed furthermore the results obtained by the histo-anatomical studies. Sections achieved through vegetative organs reveal typical anatomical structures: a transition to the secondary structure for the root, a typical dicotyledons’ structure with bicollateral vascular bundles for the stem, a bifacial structure of the leaf and stem-like structures for the tendrils and petioles, which prove they are metamorphosis of the stem. Anatomical structure of reproductive organs was performed hereby for the first time and revealed a typical anatomical structure for the 3-lodged ovary and a leaf-like structure of the male flower petal. Some of the results obtained confirm existing data from the scientific literature and additional information have been provided, outlining features that were not previously reported, such as SEM analysis of the leaf trichomes and histo-anatomical structure of the reproductive organs.

  15. Foraging ecology of sanderlings Calidris alba wintering in estuarine and non-estuarine intertidal areas

    Science.gov (United States)

    Lourenço, Pedro M.; Alves, José A.; Catry, Teresa; Granadeiro, José P.

    2015-10-01

    Outside the breeding season, most shorebirds use either estuarine or non-estuarine intertidal areas as foraging grounds. The sanderling Calidris alba is mostly associated with coastal sandy beaches, a habitat which is currently at risk worldwide due to increasing coastal erosion, but may also use estuarine sites as alternative foraging areas. We aimed to compare the trophic conditions for sanderlings wintering in estuarine and non-estuarine sites within and around the Tejo estuary, Portugal, where these two alternative wintering options are available within a relatively small spatial scale. To achieve this, we analysed sanderling diet, prey availability, foraging behaviour, and time and energy budgets in the different substrates available in estuarine and non-estuarine sites. In terms of biomass, the most important sanderling prey in the estuarine sites were siphons of the bivalve Scrobicularia plana, polychaetes, staphylinids and the gastropod Hydrobia ulvae. In non-estuarine sites the main prey were polychaetes, the bivalve Donax trunculus and chironomid larvae. Both food availability and energetic intake rates were higher on estuarine sites, and sanderlings spent a higher proportion of time foraging on non-estuarine sites. In the estuary, sanderlings foraged in muddy-sand substrate whenever it was available, achieving higher intake rates than in sandy substrates. In the non-estuarine sites they used both sandy and rocky substrates throughout the tidal cycle but had higher intakes rates in sandy substrate. Estuarine sites seem to offer better foraging conditions for wintering sanderlings than non-estuarine sites. However, sanderlings only use muddy-sand and sandy substrates, which represent a small proportion of the intertidal area of the estuary. The extent of these substrates and the current sanderling density in the estuary suggest it is unlikely that the estuary could provide alternative wintering habitat for sanderlings if they face habitat loss and

  16. Topical management of striae distensae (stretch marks): prevention and therapy of striae rubrae and albae.

    Science.gov (United States)

    Ud-Din, S; McGeorge, D; Bayat, A

    2016-02-01

    Striae distensae (SD) are common dermal lesions, with significant physical and psychological impact. Many therapeutic modalities are available but none can completely eradicate SD. The most common therapy is the application of topicals used both therapeutically and prophylactically. Even though there are many commercially available topical products, not all have sufficient level of evidence to support their continued use in SD. The aim here was to assess the evidence for the use of topicals in SD and to propose a structured approach in managing SD. A systematic search of published literature and manufacturer website information for topicals in SD was carried out. The results showed that there are few studies (n = 11) which investigate the efficacy of topicals in management of SD. Trofolastin and Alphastria creams demonstrated level-2 evidence of positive results for their prophylactic use in SD. Additionally, tretinoin used therapeutically showed varying results whilst cocoa butter and olive oil did not demonstrate any effect. Overall, there is a distinct lack of evidence for each topical formulation. The majority of topicals failed to mention their effect on early vs. later stages of SD (striae rubrae compared to striae albae) and their role in both prevention and treatment. In conclusion, there is no topical formulation, which is shown to be most effective in eradicating or improving SD. A structured approach in identification and targeted management of symptoms and signs with the appropriate topical is required. Randomized controlled trials are necessary to assess the efficacy of topical products for treatment and prevention of different stages of SD. PMID:26486318

  17. Pathogens present on vegetative organs and seeds of white mustard (Sinapis alba L.) and chinese mustad (Brassica juncea L.)

    OpenAIRE

    Barbara Majchrzak; Tomasz P. Kurowski; Zofia Karpińska

    2013-01-01

    The research was conducted in the years 1999-2001. The aim of the research was to determine the health condition of overground parts and seeds of white niuslard (Sinapis alba L.) cv. Metex and chinese mustard (Brassica juncea L.) cv. Małopolska. In all the years of the research alternaria blight was found on the leaves of white mustard which injury index ranged from 5,6% in 2001 to 17,6% in 200O. The most dangerous disease of chinese mustard also was alternaria blight and its symptoms were fo...

  18. THE RANKING OF FIRMS FROM ROMANIA, ALBA COUNTY BASED ON THEIRS TURNOVER, NET PROFIT AND TOTAL DEBTS

    OpenAIRE

    Sorin-Constantin Deaconu

    2012-01-01

    This paper investigates the accuracy of Top of the Companies elaborated byAlba County Chamber of Commerce and Industry and Agriculture based on theirs turnover.Thus, we want a correction to be made for the Top of the Companies and a change to be madefor the Chamber of Commerce and Industry of Romania Regulation in what concerns the wayto establish the order in which companies are ranked in the county competition. The analysiswas performed by calculating the coefficient of variation. The resul...

  19. 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”.

  20. Physico-Chemical Characteristics of the Products Derived from the Thermolysis of Waste Abies alba Mill. Wood

    OpenAIRE

    López, Félix A.; Rodríguez, Olga; Urien, Andrea; Lobato Ortega, Belén; Álvarez Centeno, Teresa; Alguacil, Francisco José

    2013-01-01

    [EN] This paper reports the physico-chemical characteristics of the products derived from the thermolysis (thermolytic distillation) of waste silver fir (Abies alba Mill.) wood at different temperatures (400℃- 600℃) in a pilot scale plant. Depending on the thermolysis temperature, the procedure yielded 45 - 53 wt% pyroligneous acid with a high water content (80 - 86 wt%) and pH ≈ 3.6. The process also produced a carbonaceous solid or biochar (23 - 26 wt%), its properties strongly dependent on...

  1. The Frequency of Plasmodesmata Increases Early in the Whole Shoot Apical Meristem of Sinapis Alba L. During Floral Transition

    OpenAIRE

    Ormenese, Sandra; Havelange, Andrée; Deltour, Roger; BERNIER, GEORGES

    2000-01-01

    The frequency of plasmodesmata increases in the shoot apical meristem of plants of Sinapis alba L. induced to flower by exposure to a single long day. This increase is observed within all cell layers (L1, L2, L3) as well as at the interfaces between these layers, and it occurs in both the central and peripheral zones of the shoot apical meristem. The extra plasmodesmata are formed only transiently, from 28 to 48 h after the start of the long day, and acropetally since they are detectable in L...

  2. El fracaso del proyecto de ley de beneficios extraordinarios de Santiago Alba, en 1916: Una lectura política

    OpenAIRE

    Martorell Linares, Miguel Ángel

    1998-01-01

    Este artículo aborda dos aspectos importantes en la elaboración de las políticas fiscales durante la Restauración: la posición central del Parlamento en la toma de decisiones político-fiscales y las relaciones entre los partidos con representación parlamentaria y los grupos de presión. En 1916 el ministro de Hacienda Santiago Alba intentó incorporar al sistema tributario español un impuesto sobre los beneficios extraordinarios derivados, adoptado ya por la mayoría de los países beligerantes e...

  3. An Integrative-Relational Framework of Intervention at Casa de Alba: therapeutic community for severe mental health problems

    OpenAIRE

    Pereira, João

    2015-01-01

    Casa de Alba, founded by Romão de Sousa Foundation is a Therapeutic Community for Severe Mental Health Problems in Rural Portugal which is now celebrating the first year of existence. In this article, I will start by contextualizing the beginning of the project and my state of mind when I joined it; I will then give a brief glance through the theoretical and practical inspirations behing the project as well as some difficulties faced in the materialization of my original ideas; I finish with ...

  4. El museo como espacio educativo

    OpenAIRE

    Rey Martín, Marta

    2013-01-01

    El Trabajo Fin de Grado titulado "El museo como espacio educativo" tutelado por D. Jesús Féliz Pascual Molina, trata sobre el estudio acerca de cómo se usan los museos como espacios lúdicos y como mediadores de enseñanza. Para su realización se ha tenido en cuenta la legislación vigente y sobre todo el Decreto 122/2007 de 27 de Diciembre, por el que se establece el currículo de Educación Infantil en Castilla y León. En él se hace mención a la evolución de los museos, los diferentes tipos exis...

  5. Anxiolytic effects of repeated treatment with an essential oil from Lippia alba and (R)-(-)-carvone in the elevated T-maze

    OpenAIRE

    V.Y. Hatano; A.S. Torricelli; Giassi, A.C.C.; Coslope, L.A.; M.B. Viana

    2012-01-01

    Lippia alba (Mill.) N.E. Brown (Verbenaceae) is widely used in different regions of Central and South America as a tranquilizer. The plant’s anxiolytic properties, however, merit investigation. The present study evaluated the effects of repeated daily (14 days) intraperitoneal (ip) treatment with an essential oil (EO) from a chemotype of L. alba (LA, chemotype II, 12.5 and 25 mg/kg; N = 6-8) and (R)-(-)-carvone (25 mg/kg; N = 8-12), the main constituent of this chemotype, on male Wistar...

  6. El paisaje como estrategia proyectual

    OpenAIRE

    Mínguez Martínez, Enrique

    2014-01-01

    La presente comunicación tiene por objeto presentar los trabajos realizados por los alumnos de la asignatura de Urbanística III de la titulación Grado en Arquitectura de la Universidad Católica San Antonio de Murcia (UCAM). Mientras que en el Urbanismo funcionalista el objeto del proyecto son los edificios y el paisaje se entiende como un relleno verde, residual, identificado por Colin Rowe en Ciudad Collage (1978) como modelo Acrópolis, en los ejercicios realizados el análisis pormenorizado ...

  7. La Tierra vista como exoplaneta

    OpenAIRE

    Antígona Segura

    2010-01-01

    La Tierra, como único ejemplo de planeta habitable, nos da los primeros elementos para caracterizar el espectro de planetas de tipo terrestre alrededor de otras estrellas que podrían ser detectados en el transcurso de la próxima década gracias a misiones como CoRoT y Kepler y caracterizados por las misiones Terrestrial Planet Finder y Darwin. En este artículo se compendian los estudios que utilizan a la Tierra para determinar las posibles características de mundos habitables alrededor de otra...

  8. El arte como posible conocimiento

    OpenAIRE

    Janitzio Alatriste Tobilla; Eduardo Bernal Gómez; Manuel Encastin Cruz

    2010-01-01

    Este artículo es producto de una investigación que intenta construir un modelo metodológico para concebir la producción artística como una forma de conocimiento e incorporar el quehacer imaginario del artista dentro de los esquemas que regulan la investigación académica tanto en México como en el mundo. La construcción de esta propuesta metodológica ha sido creada desde tres posiciones con respecto al conocimiento: la semiótica de Charles S. Peirce, la teoría psicoanalítica de Jacques Lacan y...

  9. 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

  10. HMG-CoA reductase inhibitory activity and phytocomponent investigation of Basella alba leaf extract as a treatment for hypercholesterolemia.

    Science.gov (United States)

    Baskaran, Gunasekaran; Salvamani, Shamala; Ahmad, Siti Aqlima; Shaharuddin, Noor Azmi; Pattiram, Parveen Devi; Shukor, Mohd Yunus

    2015-01-01

    The enzyme 3-hydroxy-3-methyl-glutaryl-coenzyme A (HMG-CoA) reductase is the key enzyme of the mevalonate pathway that produces cholesterol. Inhibition of HMG-CoA reductase reduces cholesterol biosynthesis in the liver. Synthetic drugs, statins, are commonly used for the treatment of hypercholesterolemia. Due to the side effects of statins, natural HMG-CoA reductase inhibitors of plant origin are needed. In this study, 25 medicinal plant methanol extracts were screened for anti-HMG-CoA reductase activity. Basella alba leaf extract showed the highest inhibitory effect at about 74%. Thus, B. alba was examined in order to investigate its phytochemical components. Gas chromatography with tandem mass spectrometry and reversed phase high-performance liquid chromatography analysis revealed the presence of phenol 2,6-bis(1,1-dimethylethyl), 1-heptatriacotanol, oleic acid, eicosyl ester, naringin, apigenin, luteolin, ascorbic acid, and α-tocopherol, which have been reported to possess antihypercholesterolemic effects. Further investigation of in vivo models should be performed in order to confirm its potential as an alternative treatment for hypercholesterolemia and related cardiovascular diseases. PMID:25609924

  11. A regulatory approach on low temperature induced enzymatic and anti oxidative status in leaf of Pui vegetable (Basella alba).

    Science.gov (United States)

    Shahidul Haque, Md; Monirul Islam, Md; Abdur Rakib, Md; Asraful Haque, Md

    2014-09-01

    Basella alba is a soft green vegetable, survives in adverse environmental circumstances, for example, very cold temperature although the mechanism and the temperature sensitivity in this species are not clarified. Pot experiment for cultivation of B. alba was carried out to examine the effects of low temperature on the synthesis of two enzymes, polyphenol oxidase (PPO) and peroxidase (POD) in leaf of this plant. They were exposed to 8 °C for 24 h, 48 h and 72 h periods and the respective controls were kept in ambient room temperature for the above mentioned time. Low temperature causes the higher activity of PPO and the threshold level was found after 48 h period when compared to the respective controls. The activity was higher at 10 mM catechol, substrate for this enzyme, than 100 mM and 200 mM concentration, however, the three doses yielded the gradual increase in activity. Similar stimulatory effects on peroxidase (POD) activity in leaf were observed whenever the plants were exposed to cold for 24 h, 48 h and 72 h periods and maximal after 48 h period. Our findings demonstrate that the higher activity of these enzymes in leaf might be an index for the regulatory mechanism of the survival of these species in such adverse environment. PMID:25183947

  12. Effect of heavy metal treatments on metallothionein expression profiles in white poplar (Populus alba L. cell suspension cultures

    Directory of Open Access Journals (Sweden)

    Anca MACOVEI

    2010-11-01

    Full Text Available Populus species and hybrids are intensively cultivated as sources of woody biomass and are good candidates for phytoremediation because of their rapid growth rate, extensive root system and ease of propagation and transformation. To date, the molecular mechanisms that regulate heavy metal tolerance have not been fully investigated. In the present work, white poplar (Populus alba L. cell suspension cultures were used as model system to investigate the response to heavy metal treatments. The VFMT2 cDNA, encoding a type 2 metallothionein from P. alba, was isolated by RT-PCR approach. The expression profiles of the VFMT2 gene were then investigated by Quantitative Real Time Polymerase Chain Reaction (QRT-PCR under oxidative stress conditions. The latter were induced by exposing the cell suspension cultures to different doses of cadmium (75 and 150 μM CdSO4, copper (50 and 100 μM CuCl2 and zinc (1 and 2 mM ZnSO4. Cell death was evidenced by Evans blue staining. The VFMT2 gene was up-regulated in response to heavy metal treatments and the highest mRNA level (up to 5-fold was observed 4 h following exposure to 100 μM CuCl2.

  13. Morpho-physiological response of Populus alba to erythromycin: A timeline of the health status of the plant.

    Science.gov (United States)

    Pierattini, Erika Carla; Francini, Alessandra; Raffaelli, Andrea; Sebastiani, Luca

    2016-11-01

    Populus alba Villafranca clone was chosen for a proof of concept study to determine the potential uptake and accumulation of antibiotics by trees. Plants were grown hydroponically and irrigated with a recirculating Hoagland's nutrient solution (control) and Hoagland's nutrient solution fortified with erythromycin at 0.01, 0.1 and 1mgL(-1). After 3 and 28days of treatment, poplar plants were separated into roots, stem, and leaves. Plants showed good health all over the period of treatment, and no differences in poplar growth for all the concentrations of erythromycin tested were observed. Quantification of erythromycin was performed using liquid chromatography electrospray ionization tandem mass spectrometry (LC-MS/MS) in positive ion mode using multiple reaction ion monitoring. Erythromycin was detected in all organs analyzed. Roots showed an erythromycin concentration tenfold higher than leaves. The photochemical efficiency of photosystem II did not show a dose-dependant trend. From the quenching analysis of chlorophyll fluorescence, low nonphotochemical quenching (NPQ) and high photochemical quenching (qP) for the first week of erythromycin exposure was observed, depending on leaves position along the stem. Results suggest a short term adaptation of the photosynthetic apparatus of Populus alba in response to environmental realistic erythromycin concentrations. PMID:27366984

  14. 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.

  15. 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. PMID:27254445

  16. In vitro antifungal activity of four chemotypes of Lippia alba (Verbenaceae essential oils against Alternaria solani (Pleosporeaceae isolates

    Directory of Open Access Journals (Sweden)

    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.

  17. El sistema de albañilería integral AllWall con BHH/BLOC+

    Directory of Open Access Journals (Sweden)

    Adell, Josep Mª

    2005-02-01

    Full Text Available A new construction theory is discussed, based on the erection of masonry walls that can be reinforced in all three spatial dimensions, regardless of the material employed and using plain mortar instead of concrete.
    The AllWall integral masonry system is especially designed to facilitate the mason’s work and lower labour costs, while controlling wall cracking and broadening the scope of application of masonry technique.
    NORMABLOC, the Spanish association of concrete manufacturers, is encouraging the use of the AllWall building system with its new concrete block, BLOC+.

    Se desarrolla a continuación, una nueva técnica constructiva para levantar muros de fábrica armados en las 3 direcciones del espacio, cualquiera que sea el material empleado y utilizando sólo mortero en lugar de hormigón.
    El Sistema de Albañilería Integral AllWall, está especialmente ideado para facilitar la ejecución por parte del albañil, y economizar mano de obra, al tiempo que controla la fisuración de la fábrica e incrementa las aplicaciones técnicas de las fábricas.
    La Asociación de Fabricantes de Hormigón española, NORMABLOC, está potenciando el sistema constructivo AllWall, con su nuevo bloque de hormigón BLOC+.

  18. Upper Cretaceous - lowermost Miocene lithostratigraphic units exposed in Alba Iulia-Sebes-Vintu de Jos area (SW Transylvanian Basin

    Directory of Open Access Journals (Sweden)

    Vlad Codrea

    2004-04-01

    Full Text Available A main area where several Uppermost Cretaceous-Lower Cenozoic formations are exposed in the SW Transylvanian Depression is the region outlined by the localities Alba Iulia, Sebeş, Vinţu de Jos (Alba district. In Maastrichtian, continental formations belonging to the post-Laramian cover began their deposition. In Early Cenozoic, the dominance of continental formations continued, but some short marine transgress events occur too, with specific marine and brackish deposits interbedded into the continental successions. Some new lithostratigraphic units are proposed: Vurpăr (Maastrichtian, Şard (Maastrichtian-Late Eocene, Bărăbanţ (Oligocene and Sântimbru (Aquitanian formations. Ighiu Fm. (Late Eocene-Early Oligocene is also reinterpreted. This region is an outstanding one for the fossil vertebrate heritage too due to the Uppermost Cretaceous (Maastrichtian dinosaur fauna discovered into Vurpăr and Şard formations, very similar with the famous faunas described by Nopcsa from Haţeg Basin. The autochthony of these fossils is obvious. In this context, some corrections should be done on several older geological maps, where these deposits correspond to erroneous geological ages.

  19. Producción de tilapia nilótica (Oreochromis niloticus L.) utilizando hojas de chaya (Cnidoscolus chayamansa McVaugh) como sustituto parcial del alimento balanceado Nile tilapia production (Oreochromis niloticus L.) using tree spinach leaves (Cnidoscolus chayamansa McVaugh) as a partial substitute for balanced feed

    OpenAIRE

    Gaspar R Poot-López; Eucario Gasca-Leyva; Miguel A. Olvera-Novoa

    2012-01-01

    La acuicultura es una alternativa para la producción de proteína de alta calidad a bajo precio, particularmente en países en desarrollo y desabasto de alimentos. En zonas rurales, la disponibilidad de insumos alternativos es clave para mejorar la producción en el cultivo de peces, sobre todo si dichos insumos se usan en forma cruda. Una opción son las hojas de chaya (Cnidoscolus chayamansa), arbusto que crece en México, Centroamérica y Sudamérica. En este estudio se evaluó durante dos épocas ...

  20. 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

    Directory of Open Access Journals (Sweden)

    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.

  1. 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 .

  2. Pollen percentage thresholds of Abies alba based on 13-year annual records of pollen deposition in modified Tauber traps: perspectives of application to fossil situations

    Czech Academy of Sciences Publication Activity Database

    Pidek, I. A.; Svitavská-Svobodová, Helena; van der Knaap, W. O.; Magyari, E.

    2013-01-01

    Roč. 195, Aug. 16 (2013), s. 26-36. ISSN 0034-6667 Grant ostatní: European Commission(XE) FP7/2007-2013/ERCno.278065 Institutional support: RVO:67985939 Keywords : Abiers alba * percentage treshold value * pollen Tauber traps Subject RIV: EF - Botanics Impact factor: 1.656, year : 2013

  3. The Nutritive value of mulberry leaves (Morus Alba) and partial replacement of cotton seed in rations on the performance of growing Vietnamese cattle

    NARCIS (Netherlands)

    Vu, C.C.; Verstegen, M.W.A.; Hendriks, W.H.; Pham, K.T.

    2011-01-01

    The in vivo digestibility of mulberry leaves (Morus alba) and the effects of the partial replacement of cotton seed with fresh mulberry leaf in rations on the performance of growing Vietnamese cattle was investigated. For the in vivo digestibility trial, twenty castrated rams of Phanrang breed (a lo

  4. 缪希雍白芍平肝法浅析%A B rief Analysis of Miu Xi-yong's Using Radix Paeoniae Alba to Pacify Liver

    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 .

  5. Influência do horário de colheita sobre o rendimento e composição do óleo essencial de erva-cidreira brasileira [Lippia alba (Mill. N. E. Br.] Influence of harvest time on the yield and composition of essential oil from the Brazilian "erva-cidreira" [Lippia alba (Mill. N. E. Br.

    Directory of Open Access Journals (Sweden)

    P.A.D. Ehlert

    2013-01-01

    Full Text Available Este trabalho teve como objetivo verificar se o horário de colheita da erva-cidreira brasileira [Lippia alba (Mill. N. E. Br.], fenotipo carvona-limoneno, tem influência sobre a produção de massa foliar, rendimento e composição do óleo essencial. Foram avaliados cinco horários de colheita quando a cultura estava com 145 dias desde o transplante: 8:00, 10:00, 12:00, 14:00 e 16:00 h com cinco repetições, distribuídos em blocos casualizados. O experimento foi conduzido na Fazenda Experimental Lageado da FCA-UNESP/Botucatu no Setor de Horticultura do Departamento de Produção Vegetal. A colheita foi realizada a 15 cm da superfície do solo e o óleo essencial obtido através de hidrodestilação, em aparelho tipo Clevenger. Levou-se em consideração os fatores agronômicos e o rendimento obtido por hidrodestilação. O óleo essencial foi analisado em cromatógrafo gasoso acoplado a espectrômetro de massas (CG/EM. Os resultados foram submetidos à análise de variância (Teste F e as médias comparadas pelo teste de Tukey. Não houve diferença estatística para produção de massa foliar, teor de óleo essencial e produtividade de óleo essencial em massa fresca e seca. No entanto, entre os compostos majoritários do óleo essencial das folhas, carvona e limoneno, a melhor produtividade de carvona foi obtida às 10:00 h, em matéria fresca (2,050 L ha-1 e em matéria seca (2,068 L ha-1, e para o limoneno às 16:00 h, em matéria fresca (1,068 L ha-1 e em matéria seca (1,060 L ha-1.This study aimed to verify whether the harvest time of the "Brazilian erva-cidreira" [Lippia alba (Mill. N. E. Br.], limonene-carvone chemotype, influences leaf mass production and essential oil yield and composition. Five different harvest times were evaluated at 145 days after transplanting: 8:00, 10:00, 12:00, 14:00 and 16:00, with five replicates, distributed in randomized blocks. The experiment was carried out at Lageado Experimental Farm of the School

  6. El singular como diferencia divina

    Directory of Open Access Journals (Sweden)

    Maria Jose Binetti

    2012-01-01

    Full Text Available Mucho se ha hablado sobre la posición de la diferencia como motor dialéctico de la existencia singular kierkegaardiana. El pecado, el otro o el Otro fisuran la subjetividad humana y la obligan a una identidad que guardará siempre la herida. El sujeto de la escisión es, en este sentido, el existente mismo, y tal debe ser el caso si la perspectiva se concentra en la individualidad. No obstante, y desde el punto de vista especulativo, creemos que los mismos principios utilizados por Kierkegaard para explicar el dinamismo de la existencia singular nos llevan más lejos, a saber, nos conducen al absoluto mismo como sujeto último de toda alteridad, respecto del cual el singular hace la diferencia.

  7. Utilización de las escorias de los hornos de arco eléctrico y de cuchara como materiales de construcción. // Use of slags from ladle and electric arc furnaces as construction materials.

    Directory of Open Access Journals (Sweden)

    R. Zaragoza Valdés

    2001-01-01

    Full Text Available La necesidad que tiene la humanidad de que las producciones sean cada día mas limpias, así como la que tiene el país del aumento dela rentabilidad de las empresas, hace necesario el estudio del uso de las escorias que se obtienen en la producción de acero, principalresidual de este tipo de producción. En el trabajo se estudia la utilización de la escoria del Horno de Arco Eléctrico (HAE comomaterial de relleno en la confección de bloques de hormigón para la construcción de edificaciones, sustituyendo la grava de granito.Se estudia, además, el uso de la escoria de los hornos cuchara (HC como sustituto del clinquer en la fabricación de cementosportland. Se obtienen resultados positivos para la protección del medio ambiente y la economía de la empresa metalúrgica.Palabras claves: producción de acero, escorias, medio ambiente, cementos, materiales para la construcción.________________________________________________________________________________Abstract:The existing necessity of clean productions as welll as the profitability of enterprises that the Cuban economy is demanding makes itnecessary to carry out a study of slags that constitute t he main residue of the steel production. This paper presents the use of slags comingfrom electric arc furnaces (EAF as a substitute for gravel in the production of concrete bricks. The use of slags coming from ladle furnaces(LF to replace clinker in the production of Portland Cement is also shown. Positive results are obtained such as the protection of theenvironment and the economic growth of the enterperise.Key words:Steel making, slags, environment protection, cement, construction materials.

  8. Effects of the methanolic extracts of Zizyphus spina christi, Olea europaea and Morus alba leaves in Streptozotocin- induced diabetic rats

    Directory of Open Access Journals (Sweden)

    A. I. Othman*, M. A. Amer*, M. Abdel-Mogib **, R. F. Samaha

    2009-12-01

    Full Text Available Background:The present study aims to investigate the hypoglycemic, hypolipidimic and antioxidant effect of the methanolic crude extracts of Zizyphus spina christi, Morus alba and Olea europaea leaves, individually or in combination against diabetes induced rats by Streptozotocin (STZ. Results:Hyperglycemia and hyperlipidaemia except in high density lipoproteins (HDL were observed in serum after 5 weeks of STZ administration. This was associated with a depression in hepatic glutathione (GSH concentration as well as hepatic catalase (CAT, glutathione-s-transferase (GST and superoxide dismutase (SOD activates. In addition hepatic thiobarbituric acid-reactive substance (TBARS and protein carbonyl (PC were significantly elevated, indicating increased lipid and protein oxidation and oxidative stress. Depression in blood hemoglobin (Hb content, serum insulin levels, total antioxidant capacity (TAOC and nitric oxide (NO levels as well as body weight gain were also observed in diabetic rats. Administration of 100mg/kg alcoholic extracts of Zizyphus spina christi, Morus alba and Olea europaea leaves 3 days before and after STZ injection daily for 5 weeks significantly ameliorated the oxidative stress evidenced by lowering TBARS & PC as well as increasing hepatic GSH concentration and CAT, GST and SOD activates as compared with STZ treated rats. These effects were paralleled with marked protection against STZ induced hyperglycemia and disturbance of lipid profile. They also caused a great improvement in insulin levels, TAOC, NO, Hb content and body weight gain. Conclussion:Thus, these results showed that the administration of the crude extracts of either Zizyphus spina christi, Morus alba or Olea europaea leaves individually or in combination might improve the clinical manifestation of diabetes and decrease the oxidative stress, this study supports the beneficial effects of these extracts especially Zizyphus spina christi, which showed marked amelioration

  9. Variations of wood delta 13C and water-use efficiency of Abies alba during the last century

    International Nuclear Information System (INIS)

    Variations of intrinsic water-use efficiency during the last century were investigated based on analysis of δ13C in tree rings of Abies alba from the Jura Mountains (eastern France). To separate the effects related to the age of the tree at the time the tree ring was formed from effects due to environmental changes, analyzed wood samples were extracted from a very large sample set including different tree ages and calendar dates of wood formation. For the first 75 yr of the life of Abies alba, δ13 of wood holocellulose increases with the age of the tree from -24.4%o at age 15 to approximately -22.5%o at age 75. Between the ages of 75 and 150 values remain constant at -22.5%. Consequently, the effect of the tree age on isotopic discrimination has to be taken into account in studies on the long-term environmental effects on δ13 in tree rings. Divergent trends of δ13 during the last century were observed between tree rings formed at age 40 and bulk air data. The isotopic discrimination Δ varied insignificantly around a mean of 17.3%o between the 1860s and the 1930s. It then decreased to 15.8%o from the 1930s to the 1980s. Using these results and classical models of carbon discrimination, we calculated that the intrinsic water-use efficiency (A/gw, the ratio of CO2 assimilation rate to stomatal conductance for water vapor), integrated over the year, has increased by 30% between the 1930s and the 1980s. These results, obtained at the level of mature trees, are consistent with the physiological effects of increasing CO2 concentrations as observed in controlled experiments on young seedlings. They are consistent with the strong increases in radial growth observed for Abies alba in western Europe over the past decades. However, other long-term environmental changes such as increasing nitrogen deposition could cause similar effects. (author)

  10. Espacio y tiempo como conceptos

    OpenAIRE

    Farbiarz L., Benjamín

    1981-01-01

    Corrientemente estamos acostumbrados a utilizar los conceptos de espacio y tiempo bajo la idea de que estas palabras se limitan a designar realidades externas y elementales. Su aparición y uso no es debida la una ni exclusivo el otro a las ciencias físicas ; por el contrario, están presentes en el lenguaje más elemental de nuestra vida "diaria. Sin pretender dar xana definición de ellos, podemos tratar de hacer explícita su significación. El espacio, en términos nnuy generales, funciona como ...

  11. Alba-la-Romaine – étude préalable du théâtre antique

    OpenAIRE

    Saison, Audrey

    2015-01-01

    Code INSEE de la commune : 07005Lien Atlas (MCC) :http://atlas.patrimoines.culture.fr/atlas/trunk/index.php?ap_theme=DOM_2.01.02&ap_bbox=4.553;44.522;4.638;44.596 Dans le cadre du transfert de propriété du théâtre antique d’Alba-la-Romaine au Conseil général de l’Ardèche, un projet de valorisation et de restauration est mené sur l’édifice de spectacle, classé monument historique depuis 1959. Une étude de diagnostic patrimonial est lancée en amont de la restauration. Celle-ci comporte, outre u...

  12. 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. PMID:27229135

  13. 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. PMID:17193226

  14. A novel polysaccharide isolated from mulberry fruits (Murus alba L.) and its selenide derivative: structural characterization and biological activities.

    Science.gov (United States)

    Chen, Chun; Zhang, Bin; Fu, Xiong; Liu, Rui Hai

    2016-06-15

    A novel polysaccharide (MFP3P) was isolated from Murus alba L. through the hot water extraction method followed by chromatographic purification. The chemical structure of MFP3P was elucidated by acid hydrolysis, Smith degradation and methylation analysis, along with FT-IR, GC-MS, (1)H and (13)C NMR spectroscopy. Its morphological properties were further characterized by SEM and AFM. The selenide of the polysaccharide (MFP3P-Se) was obtained by the Na2SeO3/BaCl2 method. The antioxidant properties showed that MFP3P-Se exhibited higher peroxy radical-scavenging capacity than MFP3P in vitro. Moreover, MFP3P-Se had more significant hypoglycemic effects than MFP3P through promoting pancreatic cell proliferation and increasing glucose metabolism and insulin secretion. PMID:27241036

  15. Draft genome sequence of Mameliella alba strain UMTAT08 isolated from clonal culture of toxic dinoflagellate Alexandrium tamiyavanichii.

    Science.gov (United States)

    Danish-Daniel, Muhd; Han Ming, Gan; Noor, Mohd Ezhar Mohd; Yeong, Yik Sung; Usup, Gires

    2016-12-01

    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. PMID:27625991

  16. La Casa de Bernarda: compte rendu d'une experience pedagogique realisee a l'universite de Paris VIII, Vincennes ([Lorca's]"House of Bernarda Alba": An Account of a Teaching Experience at the University of Paris, VIII, at Vincennes)

    Science.gov (United States)

    Bernu, Michele; And Others

    1971-01-01

    Three professors relate a method for teaching the play, The House of Bernarda Alba," by Spanish poet Federico Garcia Lorca in a French university classroom through linguistic and literary analysis. (DS)

  17. Terroristas como pessoas no direito?

    Directory of Open Access Journals (Sweden)

    Günther Jakobs

    2009-03-01

    Full Text Available A punição de terroristas, em larga medida preliminar, ou os severos interrogatórios, não se adequam a um perfeito Estado de direito. Pertencem ao direito de exceção. Um Estado de direito que tudo abarque não poderia travar esta guerra, pois ele deveria tratar seus inimigos como pessoas e, conseqüentemente, não poderia tratá-las como fonte de perigo. Em Estados de direito que operam na prática de modo ótimo procede-se de outra maneira, e isso lhes dá a chance de não se quebrarem durante o ataque a seus inimigos.The preemptive punishment of terrorists and the use of harsh interrogation techniques are not within the classical standards of the Rule of Law. They belong rather to a state of exception. A State committed to all the usually accepted requirements of the Rule of Law would not be allowed to carry such a war, because it would have the duty to treat its enemies as persons. Therefore, it would not be authorized to treat them as a source of danger. Nevertheless, these classical standards have been challenged in the last two decades by major institutional changes that are now being discussed both in theoretical as in practical levels.

  18. 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.

  19. The effect of Morus alba leaves extract and powder on resistin levels and liver transaminase enzymes activities in diabetes.

    Science.gov (United States)

    Salemi, Z; Barzin Tond, S; Fallah, S; Shojaii, A; Seifi, M

    2016-01-01

    The current study was designed to investigate the changes of the resistin, aspartate aminotransferase (AST), alanine aminotransferase (ALT) levels of diabetic rats after treatment with Morus alba leaves flavonoid extract (MLE) and Morus alba leaves powder (MLP). Thirty male wistar rats in five groups including control and diabetic groups were included. Diabetic groups consisted of diabetic control, sham and treated group with MLE and MLP. Type 2 diabetes was induced in rats by administration of streptozotocin (STZ) and - nicotinamide. The serum concentrations of resistin and insulin in the study groups were identified by ELISA. ALT and AST activities were assayed by spectrophotometer. For the first time, it was shown that the uptake of MLE and MLP by diabetic rats could significantly decrease the serum fasting blood sugar (FBS), resistin levels and enzymes activity of ALT and AST and increases the concentration of serum insulin significantly (P<0.05). in comparison with the sham group and diabetic control. The results showed that there was no significant difference between the anti-diabetic and inflammatory properties of MLE and MLP. In this study, the possible protective effect of MLE and MLP administration was evaluated against destructive effect of STZ on liver and pancreas function in diabetic rats. The results showed that these effects may play an important role in the regulating of adipokines secretion such as resistin and insulin secretion which are involved in the control of diabetes and obesity. MLE and MLP treatment could be useful agents in combination with other therapies in diabetes improvement. PMID:27262814

  20. Two-dimensional correlation infrared spectroscopy applied to analyzing and identifying the Radix paeoniae Alba medicinal materials

    Science.gov (United States)

    Liu, Yan; Jun-quan, Wang; Shun-hang, Liu; Sun, Su-Qin

    2008-07-01

    In this paper, we employed Fourier transformation infrared spectroscopy (FTIR) and two-dimensional correlation (2D) technique to analyzing and comparing the Radix paeoniae Alba medicinal materials that provided by Good Agricultural Practice (GAP) base, the market, and China pharmaceutical biological analysis institute whose medicinal material acts as a control group. We compared the infrared spectra of the three samples, and found that they are very similar to each other, the only difference is that the control group has a strong absorbing peak at 1634 cm -1, and the sample from GAP base and suppliers have the same absorbing peak shape at 1627 cm -1 and 1625 cm -1, respectively. The comparison of three second derivative spectra indicating that the characteristic peak of the R. paeoniae Alba that from the base and the market have a one-to-one relationship with that of the control group, but at the range of 900-1200 cm -1 they have different absorbing peaks. More comparisons of 2D IR spectra were done, and the result shows that at the range of 1060-1320 cm -1, the samples from GAP has a high similarity with the control group, but the samples from the suppliers have a distinct difference with the control group. Combining the infrared spectra, second derivative spectra and 2D IR spectra, the samples of the GAP base has a strong relativity with the control group, and the productions from the suppliers have a weak relativity. Comparing with the single index quantitative analysis served by classical Liquid Chromatograph, this method is simple, fast and accurate.

  1. O futuro da ALBA 10.5102/uri.v11i1.2428

    Directory of Open Access Journals (Sweden)

    Renata de Melo Rosa

    2013-07-01

    Full Text Available Este artigo tem como objetivo discutir a iniciativa de integração – Aliança Bolivariana para os Povos da Nossa América – formada por países da América Latina com o intuito de alterar a lógica das relações de integração e cooperação e estabelecer uma ordem regional inspirada no Socialismo do Século XXI. Busca-se apresentar a iniciativa como instrumento político de transformação para, a partir disso e por meio da análise da forma como se desenvolveu e atuou, compreender a atual situação em que se encontra. Argumenta-se que as dificuldades enfrentadas pela Aliança Bolivariana devem-se à ausência da base de sustentação sólida da sociedade civil dos países-membros, o que faz com que o aprofundamento da revolução não consiga avançar no sentido de formar uma contra-hegemonia capaz de criar um novo bloco histórico nas relações regionais.

  2. Stand structure and regeneration of a mixed forest (Abies alba-Fagus sylvatica in the Central Pyrenees, Ordesa National Park, Spain

    Directory of Open Access Journals (Sweden)

    Doležal, J.

    2004-12-01

    biométricos de 2391 árboles de haya (Fagus sylvatica y abeto (Abies alba vivos o muertos -todos ellos de altura superior a 1,3 m- así como de 378 arbustos de Buxus sempervirens en el sotobosque. Se tantearon después varias hipótesis sobre la estructura y dinámica de la parcela forestal, de la regeneración de los árboles y de su coexistencia. Aunque la parcela forma parte de un bosque viejo poco alterado, en su parte inferior alberga algunas áreas que fueron objeto de pastoreo. Abies muestra típicamente muchos individuos jóvenes y progresivamente menor número de árboles en las clases de mayor tamaño, opuestamente, Fagus presenta mayor número de árboles en las clases de mayor tamaño y de mayor edad. Suponiendo que ambas especies tuvieran tasas de mortalidad similares, ello indicaría ima tendencia a dominar el abeto sobre el haya. Respecto a esta coexistencia de dos especies ecológicamente similares, hemos planteado dos hipótesis: (1 diferenciación de nichos de regeneración y (2 desarrollo de estrategias biológicas diferentes (preferencia por la supervivencia o por la fecundidad. Mediante análisis de redundancia (RDA hemos intentado averiguar si las dos especies prefieren habitats diferentes. Para estimar el papel de la competencia entre árboles de cara a la dinámica del bosque, usamos el análisis de modelos espaciales y asociaciones interespecíficas por medio de la función K de Ripley. Los datos obtenidos dan un soporte empírico a ambas hipótesis, pero hemos podido mostrar que la importancia de cada una de ellas depende del grado de heterogeneidad ambiental que se observa de abajo arriba en la ladera de la parcela. Así, en condiciones ambientales normales, a baja altitud, donde las especies codominantes solapan sus nichos de regeneración, desarrollar estrategias biológicas diferentes resulta crítico para el éxito de su coexistencia.

  3. Digestibilidade in vivo dos nutrientes de cultivares de amoreira (Morus alba L. em caprinos Digestibility in vivo of the nutrients from mulberry (Morus alba L. cultivates in goats

    Directory of Open Access Journals (Sweden)

    Cláudia Josefina Dorigan

    2004-04-01

    Full Text Available Este trabalho foi conduzido para avaliar a digestibilidade "in vivo" dos nutrientes dos cultivares de amoreira FM 86 e FM SM nas idades de crescimento de 45 e 90 dias. Foram utilizados 8 caprinos machos, da raça Saanen, com 6 meses de idade e peso vivo médio de 26kg. O delineamento experimental adotado foi o inteiramente casualizado em esquema fatorial 2 X 2 (2 cultivares de amoreira e 2 idades de crescimento. O coeficiente de digestibilidade da FDN do cultivar FM 86 (74,82 % superou o cultivar FM SM (69,36 %, não ocorrendo diferença significativa entre as idades de crescimento. Ocorreu interação significativa entre cultivar e idade de crescimento para o Coeficiente de Digestibilidade da FDA, e o cultivar FM 86 na idade de 45 dias (75,09 % superou a de 90 dias (68,82 %. Para os parâmetros NDT e oeficientes de digestibilidade da energia, MS e PB, verificou-se superioridade da idade de corte de 45 dias, sem diferença entre os cultivares. Concluiu-se que os cultivares FM 86 e FM SM apresentaram excelente valor energético e altos coeficientes de digestibilidade da MS, da PB e dos constituintes da parede celular, indicando um elevado potencial da amoreira como forrageira para caprinos.This work was carried out for evaluating in vivo digestibility of nutrients from FM 86 and FM SM cultivars of mulberry at two growth ages, 45 and 90 days. Eight Saanen male goats being six month-old and 26kg of live weight were used. Experimental design was completely randomized factorial 2 x 2 (two mulberry cultivars and two growth ages. The NDF digestibility coefficient of FM 86 cultivar (74.82% was higher than the FM SM (69.36% and there was not statiscal difference between their growth ages. In relation to ADF digestibility coefficient, there was significant interaction between cultivars and growth ages. FM 86 cultivar with 45 day-old showed ADF digestibility coefficient higher (75.09% than that with 90 day-old (68.82%. Considering NDT and energy, DM and CP

  4. Como Lo Hago Yo: Myelomeningocele

    Science.gov (United States)

    Lazareff, Jorge

    2014-01-01

    Fortificación con ádico fólico es efectiva, pero aún falta conciencia en los jóvenes. La legalidad del aborto aumenta la importancia de la consulta prenatal. Realizo la cirugía bajo microcoscopio por razones didácticas. Irrigación continua para reducir la temperatura del tejido. Trato a la plaqueta como tejido viable. No suturo la plaqueta. No cierro músculo. ATB por una semana después de cirugía. Hidrocefalia: Válvula en todos los casos de ventriculomegalia. Médula anclada: Desanclar una sola vez. Chiari II: Revisar la válvula. Incluir en el seguimiento rendimiento escolar, puede indicar obstrucción de la válvula o médula anclada. PMID:24791217

  5. El investigador como educador musical y como divulgador

    Directory of Open Access Journals (Sweden)

    Suárez-Pajares, Javier

    2000-05-01

    Full Text Available La presente ponencia trataba de plantear en la Mesa redonda "Investigación aplicada a la educación musical" una serie de problemas que surgen no tanto a quienes se dedican profesionalmente a la educación musical, sino a quienes, dedicados a la investigación y al estudio de temas relacionados con la historia de la música desde perspectivas diversas, tienen finalmente que transmitirlos a una audiencia determinada, ya sea otros colegas, alumnos de universidad, u otros públicos en los que se centra el concepto "divulgación" aludido en el título.Se incide particularmente en los problemas de la educación musical universitaria para no especialistas y en la divulgación científica aplicada a la música, un campo casi yermo sobre el que hay mucho que reflexionar: desde las nuevas posibilidades para la explicación de la música que ofrecen soportes nuevos como el CD-Rom, hasta las tradicionales formas de relación con un público melómano a través de notas a programas y críticas de conciertos.

  6. Application of Essential Oil of Artemisia Herba Alba as Green Corrosion Inhibitor for Steel in 0.5 M H2SO4

    Science.gov (United States)

    Ouachikh, O.; Bouyanzer, A.; Bouklah, M.; Desjobert, J.-M.; Costa, J.; Hammouti, B.; Majidi, L.

    Essential oil from Artemisia herba alba (Art) was hydrodistilled and tested as corrosion inhibitor of steel in 0.5 M H2SO4 using weight loss measurements and electrochemical polarization methods. Results gathered show that this natural oil reduced the corrosion rate by the cathodic action. Its inhibition efficiency attains the maximum (74%) at 1 g/L. The inhibition efficiency of Arm oil increases with the rise of temperature. The adsorption isotherm of natural product on the steel has been determined. A. herba alba essential oil was obtained by hydrodistillation and its chemical composition oil was investigated by capillary GC and GC/MS. The major components were chrysanthenone (30.6%) and camphor (24.4%).

  7. Phylogenetic systematics of Barn Owl (Tyto alba (Scopoli, 1769 complex inferred from mitochondrial rDNA (16S rRNA taxonomic implication

    Directory of Open Access Journals (Sweden)

    Mansour Aliabadian

    2012-09-01

    Full Text Available The Barn owl, Tyto alba (Scopoli, 1769, occurs worldwide and shows a considerable amount of morphological and geographical variations, leading to the recognition of many subspecies throughout the world. Yet, no comprehensive study has not been done on this species. Data from mitochondrial gene (16S Ribosomal RNA (16S with 569 bp length were analyzed for 41 individuals around the world. Maximum likelihood (ML, maximum parsimony (MP and Bayesian analysis showed two distinct clades including alba clad (old world and furcata clad (new world. The amount of genetic variation within each of these clades ranged from 0.5-1.7 but variation between clades was 3.7. This data may suggest that Barn owls of the Old World may be a separate species from those of the New World.

  8. Experimental-study of the interactions between a natural C-14 radiolabeled sediment and a deposit-feeding bivalve : Abra alba

    OpenAIRE

    Amouroux, JM; Gremare, A.; Cahet, G

    1991-01-01

    Changes of radioactivity in a natural C-14 labelled sediment were monitored over a 120-hour period in the presence and in the absence of the deposit-feeding bivalve Abra alba. In both cases, the sediment showed great instability during the first ten hours of the experiment. The consequences of this result on the experimental protocol used for the study of the interactions between natural sediments and deposit-feeders are discussed. In controls, the instability is produced by an initial decrea...

  9. Cloning, Characterization and Expression Pattern Analysis of a Cytosolic Copper/Zinc Superoxide Dismutase (SaCSD1) in a Highly Salt Tolerant Mangrove (Sonneratia alba)

    OpenAIRE

    Enze Yang; Shanze Yi; Fang Bai; Dewei Niu; Junjie Zhong; Qiuhong Wu; Shufang Chen; Renchao Zhou; Feng Wang

    2015-01-01

    Mangroves are critical marine resources for their remarkable ability to tolerate seawater. Antioxidant enzymes play an especially significant role in eliminating reactive oxygen species and conferring abiotic stress tolerance. In this study, a cytosolic copper/zinc superoxide dismutase (SaCSD1) cDNA of Sonneratia alba, a mangrove species with high salt tolerance, was successfully cloned and then expressed in Escherichia coli Rosetta-gami (designated as SaCSD1). SaCSD1 comprised a complete ope...

  10. Effects of hatching asynchrony on sibling negotiation, begging, jostling for position and within-brood food allocation in the barn owl Tyto alba

    OpenAIRE

    Roulin A.

    2004-01-01

    When siblings differ markedly in their need for food, they may benefit from signalling to each other their willingness to contest the next indivisible food item delivered by the parents. This sib-sib communication system, referred to as 'sibling negotiation', may allow them to adjust optimally to investment in begging. Using barn owl (Two alba) broods. I assessed the role of within-brood age hierarchy on sibling negotiation, and in turn on jostling for position where parents predictably deliv...

  11. Ectomycorrhizal communities associated with silver fir seedlings (Abies alba Mill.) differ largely in mature silver fir stands and in Scots pine forecrops

    OpenAIRE

    Ważny, Rafał

    2014-01-01

    & Context The requirement for rebuilding forecrop stands besides replacement of meadow vegetation with forest plants and formation of soil humus is the presence of a compatible ectomycorrhizal (ECM) fungal community. & Aims This study aims to assess ectomycorrhizal fungi di-versity associated with silver fir (Abies alba Mill.) seedlings regenerating in silver fir stands and Scots pine forecrops. & Methods One-year-old seedlings were sampled in six study sites: three mature fir forests and thr...

  12. Mulberry leaves (Morus alba L.) ameliorate obesity-induced hepatic lipogenesis, fibrosis, and oxidative stress in high-fat diet-fed mice

    OpenAIRE

    Ann, Ji-Young; Eo, Hyeyoon; LIM, YUNSOOK

    2015-01-01

    Obesity is associated with chronic diseases such as fatty liver, type 2 diabetes, cardiovascular disease, and severe metabolic syndrome. Obesity causes metabolic impairment including excessive lipid accumulation and fibrosis in the hepatic tissue as well as the increase in oxidative stress. In order to investigate the effect of mulberry leaf (Morus alba L.) extract (MLE) on obesity-induced oxidative stress, lipogenesis, and fibrosis in liver, MLE has been gavaged for 12 weeks in high-fat diet...

  13. Antioxidant Capacity and HPLC-DAD-MS Profiling of Chilean Peumo (Cryptocarya alba) Fruits and Comparison with German Peumo (Crataegus monogyna) from Southern Chile

    OpenAIRE

    Simirgiotis, Mario J.

    2013-01-01

    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 cont...

  14. Litter fall dynamics of restored mangroves (Rhizophora mucronata Lamk. and Sonneratia alba Sm.) in Kenya

    OpenAIRE

    Wang'ondu, V.W.; Bosire, O; Kairo, G; Kinyamario, I; Mwaura, B; Dahdouh-Guebas, F.; N. Koedam

    2014-01-01

    Mangrove forests are active carbon sinks and important for nutrient cycling in coastal ecosystems. Restoration of degraded mangrove habitats enhances return of ecosystem goods and services, including carbon sequestration. Our objective was to assess the restoration of primary productivity of reforested mangrove stands in comparison with natural reference stands in Gazi Bay, Kenya. Litter fall data were collected in nine Rhizophora mucronata and Sonneratia alba monospecific stands by use of li...

  15. Contrasting local and regional Holocene histories of Abies alba in the Czech Republic in relation to human impact. Evidence from forestry, pollen and anthracological data

    Czech Academy of Sciences Publication Activity Database

    Kozáková, Radka; Šamonil, P.; Kuneš, P.; Novák, J.; Kočár, P.; Kočárová, R.

    2011-01-01

    Roč. 21, č. 3 (2011), s. 431-444. ISSN 0959-6836 R&D Projects: GA AV ČR IAAX00020701 Institutional research plan: CEZ:AV0Z80020508 Keywords : Abies alba * charcoal analysis * forest management * human impact * Medieval * pollen analysis Subject RIV: EF - Botanics Impact factor: 2.595, year: 2011 http://hol.sagepub.com/content/21/3/431

  16. Ocurrencias diamantíferas de la quebrada alba rosa, caño guapayito, guainía, colombia (primera ocurrencia comprobada de diamantes en colombia)

    OpenAIRE

    Romero Ordóñez, F. H.; Schultz-Güttler, R. A.; Chavez-Gil, T.

    2012-01-01

    El estudio de un deposito de diamantes localizado en un abanico aluvial de la Quebrada Alba Rosa, afluente del caño Guapayito, Comisaria del Guainía, confirma la existencia de diamantes en el territorio Colombiano. Tales mineralizaciones fueron encontradas en conglomerados, junto con guijarros, cuarzo, biotita, olivino, rutilo, circón y granate.  Existen varios interrogantes con respecto a esas mineralizaciones, principalmente en lo que se refiere a la fuente de aporte del material, edad, ori...

  17. Maintenance of water uptake and reduced water loss contribute to water stress tolerance of Spiraea alba Du Roi and Spiraea tomentosa L.

    OpenAIRE

    Kelly M Stanton; Mickelbart, Michael V.

    2014-01-01

    Two primarily eastern US native shrubs, Spiraea alba Du Roi and Spiraea tomentosa L., are typically found growing in wet areas, often with standing water. Both species have potential for use in the landscape, but little is known of their environmental requirements, including their adaptation to water stress. Two geographic accessions of each species were evaluated for their response to water stress under greenhouse conditions. Above-ground biomass, water relations and gas exchange were measur...

  18. Isolation and characterisation of phosphate solubilising microorganisms from the cold desert habitat of Salix alba Linn. in trans Himalayan region of Himachal Pradesh

    OpenAIRE

    Chatli, Anshu S.; Beri, Viraj; B S Sidhu

    2008-01-01

    Phosphate solubilising microorganisms (PSM) (bacteria and fungi) associated with Salix alba Linn. from Lahaul and Spiti valleys of Himachal Pradesh were isolated on Pikovskaya (PVK), modified Pikovskaya (MPVK) and National Botanical Research Institute agar (NBRIP) media by spread plating. The viable colony count of P-solubilising bacteria (PSB) and fungi (PSF) was higher in rhizosphere than that of non-rhizosphere. The frequency of PSM was highest on MPVK followed by NBRIP and PVK agar. The m...

  19. Suppressive response of confections containing the extractive from leaves of Morus Alba on postprandial blood glucose and insulin in healthy human subjects

    OpenAIRE

    Oku Tsuneyuki; Nakamura Sadako; Nakamura Mariko

    2009-01-01

    Abstract Background The first aim of this study was to clarify the effective ratio of extractive from leaves of Morus Alba (ELM) to sucrose so as to apply this knowledge to the preparation of confections that could effectively suppress the elevation of postprandial blood glucose and insulin. The second aim was to identify the efficacy of confections prepared with the optimally effective ratio determined from the first study, using healthy human subjects. Methods Ten healthy females (22.3 year...

  20. Isolation of a dihydrobenzofuran lignan, icariside E4, with an antinociceptive effect from Tabebuia roseo-alba (Ridley) Sandwith (Bignoniaceae) bark.

    Science.gov (United States)

    Ferreira-Júnior, Jesu C; Conserva, Lucia M; Lyra Lemos, Rosangela P; de Omena-Neta, Genilda C; Cavalcante-Neto, Araken; Barreto, Emiliano

    2015-06-01

    The antinociceptive activity of icariside E4, a dihydrobenzofuran-type lignan isolated from Tabebuia roseo-alba (Ridley) Sandwith (Bignoniaceae) bark, was evaluated in mice by using chemical and thermal models of nociception. Intraperitoneal (i.p.) administration of crude T. roseo-alba bark extract and its methanol fraction inhibited acetic acid-induced abdominal constriction in mice. Furthermore, i.p. administration of 0.1, 1, and 10 mg/kg of icariside E4 reduced the number of writhes evoked by acetic acid injection by 46.9, 82.3, and 66.6%, respectively. Icariside E4 administration had no effect in the first phase of the formalin test, but it reduced nociceptive behavior in the second phase as indicated by a reduction in the licking time. Icariside E4 did not modify thermal nociception in the hot-plate test model, suggesting that it had a peripheral antinociceptive action. The antinociceptive effect of icariside E4 in the writhing test was reversed by pre-administration of glibenclamide, but not of naloxone, atropine, yohimbine, or haloperidol. Together, these results indicated that the antinociceptive activity of icariside E4 from T. roseo-alba in models of chemical pain occurred through ATP-sensitive K(+) channel-dependent mechanisms. PMID:25138119

  1. Enhancement of the antibiotic activity of erythromycin by volatile compounds of Lippia alba (Mill. N.E. Brown against Staphylococcus aureus

    Directory of Open Access Journals (Sweden)

    Helenicy N.H. Veras

    2011-01-01

    Full Text Available Background: Lippia alba (Mill. N.E. Brown, popularly known as "erva-cidreira," is commonly found in northeastern Brazil. The leaves tea is used to treat digestive disturbances, nausea, cough, and bronchitis. Objective: This work reports the chemical composition and erythromycin-modifying activity by gaseous contact against Staphylococcus aureus. Materials and Methods: The leaves of L. alba were subjected to hydrodistillation, and the essential oil extracted was examined with respect to the chemical composition, by gas chromatography-mass spectrometry (GC-MS, and the essential oil extracted was evaluated for antibacterial and antibiotic-modifying activity by gaseous contact. Results: The overall yield of essential oil obtained by hydrodistillation was 0.52%. The GC-MS analysis has led to the identification of the main components: geranial (31.4% and neral (29.5%. It was verified that the essential oil interfered with erythromycin antibiotic activity against S. aureus ATCC 25923 was enhanced (221.4% in the presence of 12% essential oil. The 3% essential oil increased the effect against S. aureus ATCC 25923 (41.6% and S. aureus ATCC 6538 (58.3%. Conclusion: The essential oil of L. alba influences the activity of erythromycin and may be used as an adjuvant in antibiotic therapy against respiratory tract bacterial pathogens.

  2. El plomo como contaminante alimentario

    Directory of Open Access Journals (Sweden)

    C. Rubio

    2004-01-01

    Full Text Available El plomo es un metal pesado caracterizado por ocasionar efectos tóxicos sobre el tracto gastrointestinal, sobre el sistema renal y sobre el SNC y periférico, así como interferencias con sistemas enzimáticos implicados en la síntesis del grupo hemo. A pesar de que en los últimos diez años, los contenidos de plomo de los productos alimenticios se han reducido sensiblemente gracias a los esfuerzos realizados para reducir la emisión de plomo en su origen y por los progresos en la garantía de calidad de los análisis químicos, la dieta sigue siendo una fuente importante de exposición de plomo. Es por ello que, el objetivo a largo plazo de las autoridades sanitarias es el de continuar reduciendo los contenidos medios de plomo en los productos alimenticios con el fin de que las ingestas medias dietéticas de Pb de las poblaciones cumplan con la PTWI (Provisional Tolerable Weekly Intake de 25 µg Pb/Kg/semana establecida por el Comité Mixto FAO/OMS

  3. PLASTICIDAD FENOTÍPICA EN Lippia alba Y Lippia origanoides (VERBENACEAE: RESPUESTA A LA DISPONIBILIDAD DE NITRÓGENO

    Directory of Open Access Journals (Sweden)

    RODRÍGUEZ-LÓPEZ NELSON

    2008-04-01

    Full Text Available Este trabajo comparó la plasticidad fenotípica (PF a través de la etapa vegetativa de dos especies del genero Lippia (Verbenaceae que presentan amplitud ecológica contrastante con respecto a la disponibilidad de nitrógeno. Lippia alba, especie distribuida en suelos de alta a baja disponibilidad de nitrógeno y Lippia origanoides distribuida en suelos con baja disponibilidad de nitrógeno. Nuestra hipótesis de trabajo planteó que la magnitud de la plasticidad fenotípica en estas especies podría correlacionarse con su amplitud ecológica. Treinta y cinco clones de Lippia alba y Lippia origanoides fueron asignado aleatoriamente en tres tratamientos que variaron en la disponibilidad de nitrógeno en el suelo así: 0,5; 2,5 y 5 mM. A los 25, 35, 50 y 70 días cinco clones de cada especie por tratamiento fueron colectadas. Se evaluó el numero de hojas, área foliar, fracción masa de las hojas, fracción masa de la raíz, razón raíz/parte aérea, volumen de la raíz, longitud de la raíz, masa seca total y tasa de crecimiento relativo. Los resultados indican que ambas plantas presentan una alta PF a la disponibilidad de nitrógeno; sin embargo, las normas de reacción de los caracteres estimados variaron dependiendo de la especie y la edad de la planta. Contrario a nuestra hipótesis no encontramos una correlación entre la PF y la distribución ecológica de estas especies.

  4. El Derecho como argumentación

    OpenAIRE

    Atienza, Manuel

    1999-01-01

    Not available

    Frente a las concepciones del Derecho como norma, como hecho o como valor (que caracterizan, respectivamente, al norrnativismo, al realismo jurídico y al iusnaturalismo), se propone aquí un cuarto enfoque que consiste en ver el Derecho como argumentación (y que cohra especial relevancia en las sociedades democráticas). Sin embargo, no hay una única forma de entender la argumentación jurídica. Aunque conectadas entre sí, en el trabajo se distinguen tres concepc...

  5. El arte como terapia en salud mental

    OpenAIRE

    Arriola Sarralde, Ignacio

    2014-01-01

    Los planes de atención de enfermería actuales recogen nuevas intervenciones, alternativas a los cuidados convencionales y algunas de ellas poco estudiadas, como lo es el uso de distintas formas de arte como terapia complementaria a un tratamiento médico. Uno de los campos donde más fuerza tiene es en el de la salud mental, ya que permite actuar tanto de forma terapéutica como preventiva. La arteterapia engloba intervenciones con cualquier forma de arte como la pintura, la fotografía, la m...

  6. Efecto de fertilización nitrogenada en la producción de biomasa y calidad de aceite esencial en Lippia alba (Miller, Pronto alivio.

    Directory of Open Access Journals (Sweden)

    Sánchez O. M.

    2004-04-01

    Full Text Available En el Campo Experimental de la Universidad Nacional de Colombia sede Palmira (CEUNP se realizó un ensayo para evaluar el efecto de la fertilización nitrogenada, aplicando dos fuentes (gallinaza y urea en dos niveles (50 y 100 kg/ha de nitrógeno y dos frecuencias de corte (dos y cuatro meses. En el lote experimental se situaron 15 parcelas, en un diseño de bloques completos al azar, con cinco tratamientos y tres repeticiones. Para el análisis de la información se utilizó el programa estadístico SAS. El máximo rendimiento de biomasa y aceites esenciales se obtuvo con la aplicación de 100 kg/ha de nitrógeno en forma de urea y la frecuencia de corte cada dos meses. Los niveles de extracción de Lippia alba en nitrógeno variaron entre 79.7 y 128.5; fósforo entre 24.5 y 30.5; potasio entre 114.6 y 138.8 y calcio entre 100 y 150 kg/ha. El aceite esencial estuvo compuesto mayoritariamente por carvona y limoneno. Palabras claves: Fertilización nitrogenada, Lippia alba, Rendimientos biomasa, aceites esenciales, pronto alivio. ABSTRACT Nitrogenous fertilization effects in the Lippia alba production and quality. In the Experimental Center of the National University of Colombia-Palmira (CEUNP a experiment was realized to evaluate the effect of the nitrogenous fertilization, using two sources (gallinaza and urea at two levels (50 and 100 kg/ha of nitrogen and two cutting frequencies (each two and four months. In the experimental area 15 plots were planted, in a randomized Complete Blocks design random (RCBD with five treatments and three repetitions to measure the following variables: production of fresh matter, content of dry matter, nutrients extraction and content of essential oils. The analysis of variance used the statistical program SAS. The maximum yield of biomass and essential was obtained oils combining the fertilization with 100 kg/ha of nitrogen as urea and the cutting frequency every of two months. The levels of nutrients

  7. Suplementos enterales: ¿complementos o sustitutos de la dieta?

    OpenAIRE

    M. Martínez Sogues; M. Pons Busom; N. Roca Rossellini; M. Aguas Compaired; B. Eguileor Partearroyo

    2006-01-01

    Objetivo: Evaluar la utilización de suplementos nutricionales orales analizando el motivo de su prescripción y su implicación en el aporte calórico-proteico ingerido. Ámbito: Estudio realizado en un hospital universitario de 350 camas, que dispone de especialidades médicas y quirúrgicas. Sujetos, pacientes: La inclusión de pacientes se realizó mediante selección de todas las prescripciones de inicio de suplemento nutricional oral. Los criterios de exclusión fueron ser menor de 18 años, estar ...

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

    Science.gov (United States)

    Sverdrup, Line E; Krogh, Paul Henning; Nielsen, Torben; Kjaer, Christian; Stenersen, Jørgen

    2003-12-01

    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 three weeks of exposure, seed emergence and seedling weight (fresh weight and dry weight) were determined. Exposure concentrations were verified with chemical analysis. The substances tested were four polycyclic aromatic hydrocarbons (fluoranthene, pyrene, phenanthrene and fluorene), the N-, S-, and O-substituted analogues of fluorene (carbazole, dibenzothiophene and dibenzofuran, respectively), and the quinoline representative acridine. Seedling growth was a far more sensitive endpoint than seed emergence for all substances. Concentrations estimated to give a 20% reduction of seedling fresh weight (EC20-values) ranged from 36 to 290 mgkg(-1) for carbazole, 43 to 93 mgkg(-1) for dibenzofuran, 37 to 110 mgkg(-1) for dibenzothiophene, 140 to 650 mgkg(-1) for fluoranthene, 55 to 380 mgkg(-1) for fluorene, 37 to 300 mgkg(-1) for phenanthrene, and 49 to 1300 mgkg(-1) for pyrene. For acridine, no toxicity was observed within the concentration range tested (1-1000 mgkg(-1)). As illustrated by the EC20-values, there was a rather large difference in sensitivity between the species, and T. pratense was the most sensitive of the species tested. PMID:14505722

  9. Hybridization study of developmental plastid gene expression in mustard (Sinapsis alba L.) with cloned probes for most plastid DNA regions.

    Science.gov (United States)

    Link, G

    1984-07-01

    An approach to assess the extent of developmental gene expression of various regions of plastid (pt)DNA in mustard (Sinapis alba L.) is described. It involves cloning of most ptDNA regions. The cloned regions then serve as hybridization probes to detect and assess the abundance of complementary RNA sequences represented in total plastid RNA. By comparison of the hybridization pattern observed with plastid RNA from either dark-grown or light-grown plants it was found that many ptDNA regions are constitutively expressed, while several 'inducible' regions account for much higher transcript levels in the chloroplast than in the etioplast stage. The reverse situation, i.e. 'repressed' regions which would account for higher transcript levels in the etioplast, was not observed. The hybridization results obtained with RNA from 'intermediatetype' plastids suggest that transient gene expression is a common feature during light-induced chloroplast development. The time-course of gene expression differs for various ptDNA regions. PMID:24310436

  10. Determination of As in tree-rings of poplar (Populus alba L.) by U-shaped DC arc.

    Science.gov (United States)

    Marković, D M; Novović, I; Vilotić, D; Ignjatović, Lj

    2009-04-01

    An argon-stabilized U-shaped DC arc with a system for aerosol introduction was used for determination of As in poplar (Populus alba L.) tree-rings. After optimization of the operating parameters and selection of the most appropriate signal integration time (30 s), the limit of detection for As was reduced to 15.0 ng/mL. This detection limit obtained with the optimal integration time was compared with those for other methods: inductively coupled plasma-atomic emission spectrometry (ICP-AES), direct coupled plasma-atomic emission spectrometry (DCP-AES), microwave induced plasma-atomic emission spectrometry (MIP-AES) and improved thermospray flame furnace atomic absorption spectrometry (TS-FF-AAS). Arsenic is toxic trace element which can adversely affect plant, animal and human health. As an indicator of environment pollution we collected poplar tree-rings from two locations. The first area was close to the "Nikola Tesla" (TENT-A) power plant, Obrenovac, while the other was in the urban area of Novi Sad. In all cases elevated average concentrations of As were registered in poplar tree-rings from the Obrenovac location. PMID:18351436

  11. RAPD and ISSR based evaluation of genetic stability of micropropagated plantlets of Morus alba L. variety S-1.

    Science.gov (United States)

    Saha, Soumen; Adhikari, Sinchan; Dey, Tulsi; Ghosh, Parthadeb

    2016-02-01

    Plant regeneration through rapid in vitro clonal propagation of nodal explants of Morus alba L. variety S-1 was established along with genetic stability analysis of regenerates. Axillary shoot bud proliferation was achieved on Murashige and Skoog (MS) medium in various culture regimes. Highest number of shoots (5.62 ± 0.01), with average length 4.19 ± 0.01 cm, was initially achieved with medium containing 0.5 mg/l N(6)-benzyladenine (BA) and 3% sucrose. Repeated subculturing of newly formed nodal parts after each harvest up to sixth passage, yielded highest number of shoots (about 32.27) per explants was obtained after fourth passage. Rooting of shoots occurred on 1/2 MS medium supplemented with 1.0 mg/1 Indole-3-butyric acid (IBA). About 90% (89.16) of the plantlets transferred to the mixture of sand:soil:organic manure (2:2:1) in small plastic pots acclimatized successfully. Genetic stability of the discussed protocol was confirmed by two DNA-based fingerprinting techniques i.e. RAPD (random amplified polymorphic DNA) and ISSR (inter-simple sequence repeat). This protocol can be used for commercial propagation and for future genetic improvement studies. PMID:26693403

  12. Pathogens present on vegetative organs and seeds of white mustard (Sinapis alba L. and chinese mustad (Brassica juncea L.

    Directory of Open Access Journals (Sweden)

    Barbara Majchrzak

    2013-12-01

    Full Text Available The research was conducted in the years 1999-2001. The aim of the research was to determine the health condition of overground parts and seeds of white niuslard (Sinapis alba L. cv. Metex and chinese mustard (Brassica juncea L. cv. Małopolska. In all the years of the research alternaria blight was found on the leaves of white mustard which injury index ranged from 5,6% in 2001 to 17,6% in 200O. The most dangerous disease of chinese mustard also was alternaria blight and its symptoms were found on leaves and siliques. The strongest infection of leaves was in 2000 (50% and the weakest in 2001 (6,7%. In all the years of the research siliques were rather weak infected (50-8,89%. Besides powdery mildew was found on chinese mustard which injury index ranged from 0,3% in 1999 to 32,3% in 2000. Intensity of diseases was affected generally by the weather conditions. From the seeds of white mustard and chinese mustard were isolated respectively 263 and 137 colonies. Alternaria alternata was the most numerous species which makes respectively 60,9% and 42,3% isolates. Among the fungi pathogenic for white and chinese mustard were also isolated: A. brassicae, Botrytis cinerea and Rhizoctonia solami.

  13. Phytochemical Screening and Antimicrobial Activity of Crude Extracts of Basella alba and Helianthus annuus on Selected Food Pathogens

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    Ibrahim TA

    2014-03-01

    Full Text Available Phytochemicals composition and antibacterial activity of ethanol and water extract of Basellaalba and Helianthus annuus were studied against seven selected food borne bacterial pathogens using agar well diffusion and disc diffission methods. The phytochemical analysis revealed the presence of tannin, saponin, alkaloid, terpenoid, flavonoid, glycoside and phenolic compounds at varied composition in both aqueous and ethanol extract of the sample. Quantitatively phytochemical analysis of ethanolic extract of Basella alba showed alkaloid to be 3.24%, glycoside 1.34%, Saponin 2.45%, tannin 0.69%, terpenoids 0.04%, flavonoids 1.32% and phenolic compound 0.35% while Helianthus annuus showed alkaloid to be 1.23%, glycosides 0.04%, saponin 1.46%, flavonoids 0.03%, terpenoids 0.64% and phenolic compound o.34%.The aqeous and ethanolic extracts showed antibacterial activity against the test organisms.The agar well diffusion showed greater antibacterial activity in Basellaalba with better inhibition zones while the disc diffusion method has better activity in Helianthus annuus while the ethanol extracts of the plants showed stronger antibacterial activity than the water extracts. The present study re-established the antibacterial activities of the plants extracts which were attributed to the presence of phytochemicals.

  14. Molecular detection and drought resistance analysis of SacB-transgenic poplars (Populus alba ×P.glandulosa)

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    The propagation of drought-resistant transgenic poplars is one of the more effective ways to improve the ecological state of arid regions.The expression of SacB gene in transgenic lines of Populus alba × P.glandulosa was analyzed by a semi-quantitative RT-PCR.Drought resistance of these transgenic lines was evaluated by water stress trials in a greenhouse.Results showed that the mRNA transcription of SacB was found in all transgenic lines and fructan has accumulated in the leaves of these plants.The growth,biomass and leaf water content of some transgenic lines were significantly higher than those of the control plants under drought stress.Correlation analysis indicated that the said factors were significantly and positively related to the concentration of fructan in the leaves of the transgenic lines.Results revealed that the expression of SacB gene in transgenic poplars enhanced its resistance to water stress.

  15. Effect of aluminium toxicity on the development of poplar (Populus tremula L. x P. alba L. cultured in vitro

    Directory of Open Access Journals (Sweden)

    Krystyna Bojarczuk

    2014-02-01

    Full Text Available Adventitious bud cultures were established using vegetative buds from selected clones of poplar (Populus tremula L. x P. alba L. as initial explants. For multiplication of shoots a modified Murashige and Skoog medium (MS was used. Aluminium salts (aluminium sulphate and aluminium chloride were added to the media. It was found that the pH of the medium had no effect on the development of cultures at low concentrations of nutrients (1/2 or 1/4 MS. Low concentrations of aluminium (Al 25mg•dm-3 supplied as aluminium sulphate, Al 15 mg•dm-3 as aluminium chloride had no inhibitory effect on shoot development but decreased regeneration of adventitious roots. High concentrations of aluminium inhibited the development of shoots and roots, especially in a medium at pH 4.5. Microcuttings rooted in the highest percentage and formed the strongest rooting system on 1/4 strength MS medium at pH 4.5. It was found that there was no difference between the rooting of shoots excised from cultures cultivated with or without A1 in this medium at pH 5.5.

  16. Electrophysiological and behavioral responses of male fall webworm moths (Hyphantria cunea to Herbivory-induced mulberry (Morus alba leaf volatiles.

    Directory of Open Access Journals (Sweden)

    Rui Tang

    Full Text Available Volatile organic compounds (VOCs were collected from damaged and intact mulberry leaves (Morus alba L., Moraceae and from Hyphantria cunea larvae by headspace absorption with Super Q columns. We identified their constituents using gas chromatography-mass spectrometry, and evaluated the responses of male H. cunea antennae to the compounds using gas chromatography-flame ionization detection coupled with electroantennographic detection. Eleven VOC constituents were found to stimulate antennae of male H. cunea moths: β-ocimene, hexanal, cis-3-hexenal, limonene, trans-2-hexenal, cyclohexanone, cis-2-penten-1-ol, 6-methyl-5-hepten-2-one, 4-hydroxy-4-methyl-2-pentanone, trans-3-hexen-1-ol, and 2,4-dimethyl-3-pentanol. Nine of these chemicals were released by intact, mechanically-damaged, and herbivore-damaged leaves, while cis-2-penten-1-ol was released only by intact and mechanically-damaged leaves and β-ocimene was released only by herbivore-damaged leaves. Results from wind tunnel experiments conducted with volatile components indicated that male moths were significantly more attracted to herbivory-induced volatiles than the solvent control. Furthermore, male moths' attraction to a sex pheromone lure was increased by herbivory-induced compounds and β-ocimene, but reduced by cis-2-penten-1-ol. A proof long-range field trapping experiment showed that the efficiency of sex pheromone lures in trapping male moths was increased by β-ocimene and reduced by cis-2-penten-1-ol.

  17. Ultraviolet light inhibition of phytochrome-induced flavonoid biosynthesis and DNA photolyase formation in mustard cotyledons (Sinapis alba L.)

    International Nuclear Information System (INIS)

    In cotyledons of etiolated mustard (Sinapis alba L.) seedlings, phytochrome-far-red-absorbing form-induced flavonoid biosynthesis was found to be inhibited by short-term ultraviolet (UV) irradiations. UV inhibition was shown for the synthesis of quercetin, anthocyanin, and also for the accumulation of the mRNA for chalcone synthase, the key enzyme of this pathway. The UV effect was more pronounced on flavonoid biosynthesis, a process that selectively occurs in the epidermal layers, than on the synthesis of mRNA for chlorophyll a/b-binding protein localized in the mesophyll tissue. These UV inhibitory effects were accompanied by cyclobutane pyrimidine dimer (CPD) formation showing a linear fluence-response relationship. CPD formation and UV inhibition of flavonoid biosynthesis was found to be partially reversible by blue/UV-A light via DNA photolyase (PRE), allowing photoreactivation of the DNA by splitting of CPDs, which are the cause of the UV effect. Like flavonoid formation PRE was also induced by the far-red-absorbing form of phytochrome and induction was inhibited by UV. A potential risk of inhibition, in response to solar UV-B irradiation, was shown for anthocyanin formation. This inhibition, however, occurred only if photoreactivation was experimentally reduced. The PRE activity present in the etiolated seedlings (further increasing about 5-fold during light acclimatization) appears to be sufficient to prevent the persistence of CPDs even under conditions of high solar irradiation

  18. Fluorescent and X-ray diffraction analysis for industrial wastes of the Comandante Pedro Soto Alba plant

    International Nuclear Information System (INIS)

    It is presented a qualitative X-ray elemental fluorescence and diffraction analysis of the low-nickel portion (deands) of Cuban lateritic ores from Moa and Nicaro, the tailings of the Cuba nickel plant Comandante Pedro Soto Alba (in Moa) and its magnetic concentrated fractions (results of enrichment test in magnetizing roasting and wet magnetic separation). In all samples as main phase hematite (α-Fe2O3) is observed. In all deands samples there were also high concentrations of goethite (α-FeOOH) and aluminium hydroxide (Al(OH)3). In the Nicaro deands, in addition to name above phases, a modification of delta-iron hydroxide, with Ni and/or Co substitutions in the forms delta-(Fesub(0,67)Nisub(0,33))OOH, delta-(Fesub(0,67)Cosub(0,33))OOH or delta-(Fesub(0,67)Nisub(x)Cosub(0,33-x))OOH seems possible. In Moa tailings besides the hematite, the more abundant phases are a basic hydrated aluminium sulphate and gypsum. The magnetic enriched fractions are practically by a spinel of the maghemite type, and chromium seems to be included into the spinel lattice. (author)

  19. Evaluation of Toxicity and Antimicrobial Activity of an Ethanolic Extract from Leaves of Morus alba L. (Moraceae

    Directory of Open Access Journals (Sweden)

    Alisson Macário de Oliveira

    2015-01-01

    Full Text Available This work evaluated an ethanolic extract from Morus alba leaves for toxicity to Artemia salina, oral toxicity to mice, and antimicrobial activity. Phytochemical analysis revealed the presence of coumarins, flavonoids, tannins, and triterpenes in the extract, which did not show toxicity to A. salina nauplii. No mortality and behavioral alterations were detected for mice treated with the extract (300 and 2000 mg/kg b.w. for 14 days. However, animals that received the highest dose showed reduced MCV and MCHC as well as increased serum alkaline phosphatase activity. In treatments with the extract at both 300 and 2000 mg/kg, there was a reduction in number of leukocytes, with decrease in percentage of lymphocytes and increase in proportion of segmented cells. Histopathological analysis of organs from mice treated with the extract at 2000 mg/kg revealed turgidity of contorted tubules in kidneys, presence of leukocyte infiltration around the liver centrilobular vein, and high dispersion of the spleen white pulp. The extract showed antimicrobial activity against Staphylococcus aureus, Pseudomonas aeruginosa, Candida albicans, Candida krusei, Candida tropicalis, and Aspergillus flavus. In conclusion, the extract contains antimicrobial agents and was not lethal for mice when ingested; however, its use requires caution because it promoted biochemical, hematological, and histopathological alterations.

  20. Evaluation of Toxicity and Antimicrobial Activity of an Ethanolic Extract from Leaves of Morus alba L. (Moraceae)

    Science.gov (United States)

    de Oliveira, Alisson Macário; Mesquita, Matheus da Silva; da Silva, Gabriela Cavalcante; de Oliveira Lima, Edeltrudes; de Medeiros, Paloma Lys; Paiva, Patrícia Maria Guedes; de Souza, Ivone Antônia; Napoleão, Thiago Henrique

    2015-01-01

    This work evaluated an ethanolic extract from Morus alba leaves for toxicity to Artemia salina, oral toxicity to mice, and antimicrobial activity. Phytochemical analysis revealed the presence of coumarins, flavonoids, tannins, and triterpenes in the extract, which did not show toxicity to A. salina nauplii. No mortality and behavioral alterations were detected for mice treated with the extract (300 and 2000 mg/kg b.w.) for 14 days. However, animals that received the highest dose showed reduced MCV and MCHC as well as increased serum alkaline phosphatase activity. In treatments with the extract at both 300 and 2000 mg/kg, there was a reduction in number of leukocytes, with decrease in percentage of lymphocytes and increase in proportion of segmented cells. Histopathological analysis of organs from mice treated with the extract at 2000 mg/kg revealed turgidity of contorted tubules in kidneys, presence of leukocyte infiltration around the liver centrilobular vein, and high dispersion of the spleen white pulp. The extract showed antimicrobial activity against Staphylococcus aureus, Pseudomonas aeruginosa, Candida albicans, Candida krusei, Candida tropicalis, and Aspergillus flavus. In conclusion, the extract contains antimicrobial agents and was not lethal for mice when ingested; however, its use requires caution because it promoted biochemical, hematological, and histopathological alterations. PMID:26246840

  1. Detection of Sulfur-Fumigated Paeoniae Alba Radix in Complex Preparations by High Performance Liquid Chromatography Tandem Mass Spectrometry

    Directory of Open Access Journals (Sweden)

    Song-Lin Li

    2012-07-01

    Full Text Available Detection of sulfur-fumigated Paeoniae Alba Radix (PAR in different complex preparations is challenging due to the relatively lower content of PAR and interference from more complicated components in complex preparations with different multiple constituent herbs. In this study, a high performance liquid chromatography- triple-quadrupole tandem mass spectrometry method was developed for detecting sulfur-fumigated PAR in different complex preparations. Paeoniflorin, the major component of PAR, and paeoniflorin sulfonate, the characteristic artifact transformed from paeoniflorin during sulfur-fumigation of PAR, were used as chemical markers. Multiple reaction monitoring (MRM scan was employed to maximize sensitivity and selectivity. Through optimizing full mass scan and daughter ion scan conditions, two mass transitions were selected and employed respectively for unequivocal identification of paeoniflorin and paeoniflorin sulfonate. The detection limits for paeoniflorin and paeoniflorin sulfonate using MRM were much lower than those detected with UV 270 nm. Paeoniflorin and paeoniflorin sulfonate could be simultaneously detected in different commercial PAR-containing complex preparations without interference of other components using the established method, indicating that the newly established method was selective and sensitive enough for screening sulfur-fumigated PAR in commercial complex preparations.

  2. White Mulberry (Morus alba Foliage Methanolic Extract Can Alleviate Aeromonas hydrophila Infection in African Catfish (Clarias gariepinus

    Directory of Open Access Journals (Sweden)

    Atefeh Sheikhlar

    2014-01-01

    Full Text Available Two experiments were simultaneously conducted with Morus alba (white mulberry foliage extract (MFE as a growth promoter and treatment of Aeromonas hydrophila infection in separate 60 and 30 days trail (Experiments 1 and 2, resp. in African catfish (Clarias gariepinus. In Experiment 1, four diets, control and control supplemented with 2, 5, or 7 g MFE/kg dry matter (DM of diet, were used. In Experiment 2, fish were intraperitoneally infected with Aeromonas hydrophila and fed the same diets as experiment 1 plus additional two diets with or without antibiotic. Results of experiment 1 showed that growth was unaffected by dietary levels of MFE. Treatments with the inclusion of MFE at the levels of 5 and 7 g/Kg DM had no mortality. Red blood cells (RBC, albumin, and total protein were all higher for the treatments fed MFE (5 and 7 g/Kg DM. Results of experiment 2 showed RBC, hemoglobin, hematocrit, globulin, albumin, and total protein improved with the increase in MFE in the infected fish. The dietary MFE at the level of 7 g/kg DM reduced mortality rate. In conclusion, MFE at the level of 7 g/kg DM could be a valuable dietary supplement to cure the infected fish.

  3. Structural analysis and anti-obesity effect of a pectic polysaccharide isolated from Korean mulberry fruit Oddi (Morus alba L.).

    Science.gov (United States)

    Choi, Ji Won; Synytsya, Andriy; Capek, Peter; Bleha, Roman; Pohl, Radek; Park, Yong Il

    2016-08-01

    A water-soluble polysaccharide JS-MP-1 was isolated from Korean mulberry fruits Oddi (Morus alba L.). Sugar linkage analysis and NMR data confirmed that it is a rhamnogalacturonan type I (RG I) polymer carrying arabinan and arabinogalactan (AG II) side chains. JS-MP-1 reduced dose-dependently the viability of 3T3-L1 pre-adipocyte cells, significantly stimulated the cleavage of caspases 9 and 3 and poly (ADP-ribose) polymerase (PARP) and decreased the ratio of Bcl-2 to Bax expression level that led to mitochondrial dysfunction and apoptosis in pre-adipocyte cells. The apoptotic death was mediated by stimulation of MAPKs (ERK and p38) signalling pathway. These results suggest that JS-MP-1 is able to reduce the number of fat cells and the mass of adipose tissue via inhibition of pre-adipocyte proliferation and thus JS-MP-1 itself or a crude aqueous Oddi extract containing this polysaccharide can be used as functional ingredient of health-beneficial food supplements for the treatment or prevention of obesity disorders. PMID:27112865

  4. Abortive Process of a Novel Rapeseed Cytoplasmic Male Sterility Line Derived from Somatic Hybrids Between Brassica napus and Sinapis alba

    Institute of Scientific and Technical Information of China (English)

    WANG Juan; GAO Ya-nan; KONG Yue-qin; JIANG Jin-jin; LI Ai-min; ZHANG Yong-tai; WANG You-ping

    2014-01-01

    Somatic hybridization is performed to obtain significant cytoplasmic male sterility (CMS) lines, whose CMS genes are derived either from the transfer of sterile genes from the mitochondrial genome of donor parent to the counterpart of receptor or production of new sterile genes caused by mitochondrial genome recombination of the biparent during protoplast fusion. In this study, a novel male sterile line, SaNa-1A, was obtained from the somatic hybridization between Brassica napus and Sinapis alba. The normal anther development of the maintainer line, SaNa-1B, and the abortive process of SaNa-1A were described through phenotypic observations and microtome sections. The lforal organ of the sterile line SaNa-1A was sterile with a shortened iflament and delfated anther. No detectable pollen grains were found on the surface of the sterile anthers. Semi-thin sections indicated that SaNa-1A aborted in the pollen mother cell (PMC) stage when vacuolization of the tapetum and PMCs began. The tapetum radically elongated and became highly vacuolated, occupying the entire locule together with the vacuolated microspores. Therefore, SaNa-1A is different from other CMS lines, such as ogu CMS, pol CMS and nap CMS as shown by the abortive process of the anther.

  5. In vivo tracing of organochloride and organophosphorus pesticides in different organs of hydroponically grown malabar spinach (Basella alba L.).

    Science.gov (United States)

    Qiu, Junlang; Chen, Guosheng; Xu, Jianqiao; Luo, Erlun; Liu, Yan; Wang, Fuxin; Zhou, Hong; Liu, Yuan; Zhu, Fang; Ouyang, Gangfeng

    2016-10-01

    An in vivo uptake and elimination tracing study based on solid phase microextraction (SPME) was conducted to investigate the accumulation, persistence and distribution of organochloride pesticides (OCPs) and organophosphorus pesticides (OPPs) in malabar spinach (Basella alba L.) plants. Uptake and elimination of the pesticides were traced in leaves, stems and roots of living malabar spinach plants. Root concentration factor (RCF), distribution concentration factor (DCF) and transpiration stream concentration factor (TSCF) were calculated based on the in vivo tracing data. The tracing data showed that the OCPs were much more accumulative and persistent than the OPPs in roots, while they were similarly accumulative and persistent in leaves and stems. RCF values of the OPPs or OCPs were likely to increase with the increase in LogKow values except fenthion. Obtained DCF values indicated that OPPs and OCPs were more accumulative in the organs containing more lipids. TSCF values showed that the translocation of OPPs and OCPs from roots to foliage was firstly dependent on the hydrophobicity of the compounds, but also significantly affected by the water solubility. This is the first study of generating RCF, DCF and TSCF data in living plants by in vivo sampling method, which provides a foundation to promote the application of in vivo SPME and improve understanding of contaminant behaviors in living plants. PMID:27209519

  6. The influence of climate and soil properties on calcium nutrition and vitality of silver fir (Abies alba Mill.)

    International Nuclear Information System (INIS)

    As a part of a broader research into the nutrition of silver fir (Abies alba Mill.), the variation of calcium concentrations was investigated in needles and soil in two subsequent, climatologically diverse years. Statistically significant differences between plots were determined in Ca concentrations in soils. Concentrations of Ca in needles were statistically different regarding plot, defoliation class, sampling date within the same year and also between years. Fir trees on acid-rock based soils had lower, often inadequate concentrations of Ca in needles; the opposite was true for trees growing on Ca-rich soils. Trees of lower vitality generally exhibited poor Ca nutrition. Drought in the second year of research caused poor absorption of Ca on all plots and in all defoliation classes, but the combined influence of climate and soil properties affected especially trees of low vitality on acid-rock based soils. - Dry years, especially in combination with calcium-poor soils, have a strong negative effect on the Ca status of silver fir trees

  7. The isolation and the characterization of two polysaccharides from the branch bark of mulberry (Morus alba L.).

    Science.gov (United States)

    Qiu, Fan; He, Tian-Zhen; Zhang, Yu-Qing

    2016-07-01

    Two water-soluble polysaccharides termed MBBP-1 and MBBP-2 were isolated from the branches of the mulberry tree (Morus alba L.) using hot water extraction and purified on Anion-exchange DEAE52-cellulose and Sephadex G-100 column. MBBP-1 was shown to be composed of rhamnose, xylose, arabinose, mannose, glucose and galactose in the molar ratio of 4.53:2.49:4.38:4.67:17.85:5.88. MBBP-2 was composed of rhamnose, xylose, arabinose, mannose, glucose, galactose and galacturonic acid in the molar ratio of 26.85:13.8:3.14:4.4:6.1:3.19:4.9. Their structural characteristics were further investigated by FI-IR spectroscopy, Smith degradation, methylation analysis and NMR spectroscopy. Based on the data obtained, MBBP-1 had a backbone mainly consisting of (1 → 3)-linked glucose. MBBP-2 had a backbone mainly consisting of (1 → 3)-linked rhamnose and (1 → 2, 4)-linked xylose. Antioxidant assays indicated that antioxidant activities of MBBP-2 were significantly stronger than those of MBBP-1, and this was likely in relation to the different content of 8.2 % galacturonic acid in MBBP-2. PMID:27255450

  8. Extraction, purification and anti-fatigue activity of γ-aminobutyric acid from mulberry (Morus alba L.) leaves

    Science.gov (United States)

    Chen, Hengwen; He, Xuanhui; Liu, Yan; Li, Jun; He, Qingyong; Zhang, Cuiying; Wei, Benjun; Zhang, Ye; Wang, Jie

    2016-01-01

    Mulberry (Morus alba L.) is a tree species of Moraceae widely distributed in Southern China. In the present study, the white crystal of γ-aminobutyric acid (GABA) was purified from mulberry leaves, and its bioactivity was also investigated. The main results were as follows: first, the crude GABA was extracted from mulberry leaves by using biochemical methods. Then, the crude was purified by chromatography over an S-8 macroporous resin, Sephadex G-10, and 732 cation exchange resin to yield a white crystal. Lavage administration and exposure of GABA to male NIH mice showed no adverse effects on their growth and development. In an endurance capacity test, the average loaded-swimming time of medium dose was 111.60% longer than the control (P < 0.01). Further investigations showed that relative to that of model control, the respective blood lactate (BL) concentrations of low- and medium-dose were 28.52% and 28.81% lower (P < 0.05), whereas the levels of blood urea nitrogen (BUN) were 36.83% and 40.54% lower (P < 0.05), and that of liver glycogen (LG) levels were 12.81% and 17.22% lower (P < 0.05). The results indicated that GABA has an advantage over taurine of anti-fatigue effect. These findings were indicative of the anti-fatigue activity of GABA.

  9. Polyphenols from the stems of Morus alba and their inhibitory activity against nitric oxide production by lipopolysaccharide-activated microglia.

    Science.gov (United States)

    Rivière, Céline; Krisa, Stéphanie; Péchamat, Laurent; Nassra, Merian; Delaunay, Jean-Claude; Marchal, Axel; Badoc, Alain; Waffo-Téguo, Pierre; Mérillon, Jean-Michel

    2014-09-01

    Neuroinflammatory processes are involved in the pathogenesis of many neurodegenerative disorders. Microglial cells, the main immune cells of the central nervous system, represent a target of interest to search for naturally occurring anti-inflammatory products. In this study, we evaluated the anti-inflammatory properties of polyphenols obtained from the stems of Morus alba. This edible species, known as white mulberry, is frequently studied because of its traditional use in Asian medicine and its richness in different types of polyphenols, some of which are known to be phytoalexins. One new coumarin glycoside, isoscopoletin 6-(6-O-β-apiofuranosyl-β-glucopyranoside) (1) was mainly isolated by CPC (centrifugal partition chromatography) from this plant, together with seven known polyphenols (2-8). Their structures were established on the basis of spectroscopic analyses including extensive 2D NMR studies. The eight isolated compounds were evaluated for their inhibitory activities on nitric oxide (NO) production in lipopolysaccharide (LPS)-induced BV-2 microglial cells. The absence of cell toxicity is checked by a MTT assay. PMID:24912117

  10. Influência de métodos de secagem na conservação de sementes de Ipê-branco The influence of drying methods on the conservation of Tabebuia roseo-alba (Ridl. Sand. seeds

    Directory of Open Access Journals (Sweden)

    Patrícia Degan

    2001-12-01

    Full Text Available Sementes de Tabebuia roseo-alba (ipê-branco com 21,9% de água e 56,5% de germinação, foram submetidas à secagem em liofilizador, câmara seca e estufa. Depois da secagem, o teor de água das sementes foi reduzido para 3,7, 4,0 e 11,7% e a germinação para 49,0, 44,7 e 45,5%, respectivamente. As sementes liofilizadas foram acondicionadas em embalagem impermeável e as não liofilizadas em embalagens permeável e impermeável. Após o acondicionamento, as sementes foram armazenadas nos ambientes normal de laboratório, de câmara seca e de câmara fria. Avaliações da porcentagem de germinação (capacidade germinativa das sementes foram feitas periodicamente, durante 300 d de armazenamento. As sementes revelaram, durante o armazenamento, comportamento idêntico ao das classificadas como ortodoxas. Quando armazenadas em ambiente normal de laboratório, as sementes se deterioraram rapidamente. As sementes liofilizadas conservaram sua capacidade germinativa quando armazenadas em câmara fria. As sementes secadas em câmara seca, acondicionadas nas embalagens permeável e impermeável, e as secadas em estufa, acondicionadas em embalagem permeável, conservaram sua capacidade germinativa quando armazenadas na câmara seca e na câmara fria.Tabebuia roseo-alba (Bignoniaceae is a late secondary tree species native to Brazil, important for ornamental, medicinal and wood purposes. Seeds of this species with 21.9% moisture content and 56.5% germination were submitted to drying in lyophilizer, dry chamber and forced air oven. After drying, seed moisture content was reduced to 3.7, 4.0 and 11.7%, and germination percentage to 49.0, 44.7 and 45.5%, respectively. Lyophilized seeds were packed in impermeable containers and non-lyophilized seeds were packed in both permeable and impermeable containers. After packaging, seeds were stored under room, dry chamber and cold chamber conditions. Seed germination percentage (germinative capacity was periodically

  11. Consumo de morera (Morus alba y sorgo negro forrajero (Sorghum almum en ganado Jersey

    Directory of Open Access Journals (Sweden)

    Carlos Boschini

    2000-01-01

    Full Text Available Se cosecharon ramas de morera de 84 días y forraje de sorgo negro forrajero de 77 días de rebrote. El forraje fue suministrado a seis toretes Jersey con un peso vivo promedio de 337 (±24,27 kg, distribuidos en un diseño de cuadrado latino 3 x 3, repetido. Los tratamientos experimentales fueron: a.- suministro único de morera, b.- 50% de morera y 50% de sorgo negro forrajero en base verde tal como fue cosechada y c.- suministro único de sorgo negro forrajero. Ambos forrajes se ofrecieron a los animales en forma picada (hojas y tallos. La mezcla de morera y sorgo se realizó en partes iguales en base al peso fresco. Cada animal recibió 50 kg/día de forraje verde. La relación promedio de hoja:tallo en la morera fue de 1,3 (±0,39 y de 0,84 (±0,26 en el sorgo negro. Se recolectaron muestras del material ofrecido y rechazado para el análisis de materia seca, proteína cruda, fibra neutro detergente y cenizas totales. No se observaron diferencias (p>0,05 en el consumo de materia fresca y de materia seca (kg/animal/día entre los tratamientos. La ingesta de materia seca por cada 100 kg de peso vivo de los animales fue de 1,94% para la dieta de morera, 1,82% para la mezcla morera/sorgo y 1,67% para la dieta de sorgo negro, lo cual fue inferior al 2% esperado

  12. Los ritmos como terapia para la impulsividad

    Directory of Open Access Journals (Sweden)

    Mónica Triviño

    2012-10-01

    Full Text Available Investigaciones recientes muestran que el uso de patrones rítmicos facilita la respuesta óptima en el tiempo, por lo que el entrenamiento mediante ritmos podría proponerse como terapia novedosa ante problemas como la impulsividad. Esto podría beneficiar a pacientes con daño prefrontal o personas con trastorno por déficit de atención e hiperactividad (TDAH, que suelen mostrar conductas impulsivas, así como dificultad para estimar el paso del tiempo.

  13. Pensando al agua como parte del paisaje

    OpenAIRE

    Lorena Salvatelli

    2009-01-01

    El objetivo de este trabajo es discutir la importancia de los estudios de arqueología terrestre y subacuática como parte de un mismo proceso de interpretación del pasado. Se entiende que el registro arqueológico puede hallarse actualmente en una variedad de ambientes tanto terrestres como subacuáticos a causa de varias razones, como por ejemplo las oscilaciones de los niveles de agua ocurridas entre el Pleistoceno Final y el Holoceno Medio. Por lo tanto, se propone que para su ...

  14. Uso de derivados de sulfamidas como neuroprotectores

    OpenAIRE

    Rodríguez de Fonseca, Fernando; Suárez Pérez, Juan; Romero, Miguel; Fernández Espejo, Emilio; Goya, Pilar; Páez, Juan A.

    2011-01-01

    La presente invención se refiere al uso de un grupo de derivados de sulfamidas con capacidad neuroprotectora que son útiles en el tratamiento y/o prevención de enfermedades que tienen asociada muerte celular, tales como enfermedad de Alzheimer, enfermedad de Parkinson (formas esporádicas y formas hereditarias), isquemia cerebral, esclerosis lateral amiotrófica, parkinsonismo post-encefálítico, así como otras enfermedades raras que cursan con neurodegeneración como la enfermedad de Huntington ...

  15. La tipografía como marca

    OpenAIRE

    Rodríguez Valero, Daniel

    2015-01-01

    Según Interbrand una marca es una combinación de atributos, tangibles e intangibles, simbolizados por una marca registrada que, si se gestiona adecuadamente, genera valor e influencia. La tipografía y la letra en general, como vehículo natural de expresión de la parte verbal de la marca, posee una capacidad de marcación especial que muchas veces no aprovechamos como merece. El objetivo de este estudio es tratar las tipografías como si fueran marcas y no productos para conseguir incrementar su...

  16. Ocurrencias Diamantíferas de la Quebrada Alba Rosa, Caño Guapayito, Guainía, Colombia (Primera ocurrencia comprobada de diamantes en Colombia) Ocurrencias Diamantíferas de la Quebrada Alba Rosa, Caño Guapayito, Guainía, Colombia (Primera ocurrencia comprobada de diamantes en Colombia)

    OpenAIRE

    Romero Ordóñez F. H.; Schultz-Güttler R. A.; Chavez-Gil T.

    1996-01-01

    El estudio de un deposito de diamantes localizado en un abanico aluvial de la Quebrada Alba Rosa, afluente del caño Guapayito, Comisaria del Guainía, confirma la existencia de diamantes en el territorio Colombiano. Tales mineralizaciones fueron encontradas en conglomerados, junto con guijarros, cuarzo, biotita, olivino, rutilo, circón y granate.  Existen varios interrogantes con respecto a esas mineralizaciones, principalmente en lo que se refiere a la fuente de aporte del material, edad, ori...

  17. Fast-growing Acer rubrum differs from slow-growing Quercus alba in leaf, xylem and hydraulic trait coordination responses to simulated acid rain.

    Science.gov (United States)

    Medeiros, Juliana S; Tomeo, Nicholas J; Hewins, Charlotte R; Rosenthal, David M

    2016-08-01

    We investigated the effects of historic soil chemistry changes associated with acid rain, i.e., reduced soil pH and a shift from nitrogen (N)- to phosphorus (P)-limitation, on the coordination of leaf water demand and xylem hydraulic supply traits in two co-occurring temperate tree species differing in growth rate. Using a full-factorial design (N × P × pH), we measured leaf nutrient content, water relations, leaf-level and canopy-level gas exchange, total biomass and allocation, as well as stem xylem anatomy and hydraulic function for greenhouse-grown saplings of fast-growing Acer rubrum (L.) and slow-growing Quercus alba (L.). We used principle component analysis to characterize trait coordination. We found that N-limitation, but not P-limitation, had a significant impact on plant water relations and hydraulic coordination of both species. Fast-growing A. rubrum made hydraulic adjustments in response to N-limitation, but trait coordination was variable within treatments and did not fully compensate for changing allocation across N-availability. For slow-growing Q. alba, N-limitation engendered more strict coordination of leaf and xylem traits, resulting in similar leaf water content and hydraulic function across all treatments. Finally, low pH reduced the propensity of both species to adjust leaf water relations and xylem anatomical traits in response to nutrient manipulations. Our data suggest that a shift from N- to P-limitation has had a negative impact on the water relations and hydraulic function of A. rubrum to a greater extent than for Q. alba We suggest that current expansion of A. rubrum populations could be tempered by acidic N-deposition, which may restrict it to more mesic microsites. The disruption of hydraulic acclimation and coordination at low pH is emphasized as an interesting area of future study. PMID:27231270

  18. Hydraulic traits are associated with the distribution range of two closely related Mediterranean firs, Abies alba Mill. and Abies pinsapo Boiss.

    Science.gov (United States)

    Peguero-Pina, José Javier; Sancho-Knapik, Domingo; Cochard, Hervé; Barredo, Gonzalo; Villarroya, Dido; Gil-Pelegrín, Eustaquio

    2011-10-01

    Abies alba and Abies pinsapo are two closely related fir species that occur in the Iberian Peninsula under very different environmental conditions. Abies alba proliferates in the humid European mountains, including the Spanish Pyrenees. In contrast, A. pinsapo is a relict species that occurs in some restricted areas of the Mediterranean mountain ranges in Spain and Morocco, which experience intense summer drought periods. To cope with the high atmospheric evaporative demand during summer, A. pinsapo may either have a high resistance to xylem cavitation or develop a very efficient conducting system to reduce the soil-to-leaf water potential gradient. To investigate such hypotheses, we measured (i) the xylem vulnerability to cavitation for different populations, and (ii) several anatomical and hydraulic parameters indicating xylem sufficiency for -supplying water to the shoot in two contrasting populations of both species. Our results show that the resistance to cavitation was not different between species or populations. However, hydraulic conductivity (K(h)), specific hydraulic conductivity (K(s)), leaf-specific conductivity (LSC) and whole-shoot hydraulic conductance (K(shoot)) were higher in A. pinsapo, indicating a higher efficiency of water transport, which should contribute to maintaining its xylem tension below the threshold for rapidly increasing cavitation. The higher K(s) in A. pinsapo was largely a result of its wider tracheids, suggesting that this species may be much more vulnerable to freeze-thaw-induced cavitation than A. alba. This is consistent with the absence of A. pinsapo in northern mountain ranges with cooler winters. These physiological differences could partly explain the niche segregation and the geographical separation of these two firs. PMID:21937669

  19. Dehydrated Basella alba Fruit Juice as a Novel Natural Colorant: Pigment Stability, In Vivo Food Safety Evaluation and Anti-Inflammatory Mechanism Characterization.

    Science.gov (United States)

    Huang, Fu-Long; Chiou, Robin Y-Y; Chen, Wei-Cheng; Ko, Huey-Jiun; Lai, Li-Jung; Lin, Shu-Mei

    2016-09-01

    Flesh of Basella alba L. mature fruits bearing deep-violet juice provides a novel and potential source of natural colorant. To minimize the pigment purification process and warrant safety acceptability, B. alba colorant powder (BACP) was prepared using mature fruits through a practical batch preparation and subjected to fundamental pigment characterization, food safety assessment and bio-function evaluation. Yield of the dehydrated B. alba colorant powder (BACP) was 37 g/kg fresh fruits. Reconstituted aqueous solution of the BACP exhibited an identical visible spectrum (400-700 nm) as that of fresh juice. Color of the solution (absorbance at 540 nm) was stable in a broad pH ranged from 3 to 8 and enhanced by co-presence of calcium and magnesium ions, while was rapidly bleached by ferrous and ferric ions. For in vivo food safety evaluation, ICR mice were daily gavage administered with BACP up to 1000 mg/kg body weight for 28 days. Organ weight determination, serum biochemical analysis and histopathological examination of hearts, livers, lungs and kidneys revealed no obvious health hazard. In vitro anti-inflammatory activity of BACP was characterized in lipopolysaccharide (LPS)-induced RAW 264.7 macrophages. BACP exerted potent anti-inflammatory activity by down-regulation of inflammatory mediators including nitric oxide (NO), prostaglandin E2 (PGE2), TNF-α, IL-1β, IL-6 and IL-12 and the blockage of IκB kinase (IKK)/IκB/nuclear factor-κ B (NFκB) activation cascade. These results supported that BACP may serve as a beneficial alternative of natural food colorant. PMID:27405766

  20. El videojuego como material educativo: La Odisea

    Directory of Open Access Journals (Sweden)

    Belén Mainer Blanco

    2012-04-01

    Full Text Available La investigación se basa en la función educativa que pueden cumplir los videojuegos, un campo que consideramos inexplorado por tres motivos principalmente: su reciente incorporación, su impopularidad educativa (el rechazo el videojuego como herramienta de aprendizaje y considerado, por el contrario, como una distracción, y la incompleta incorporación de las nuevas tecnologías de información y comunicación (TIC en el ámbito familiar y educativo. En una segunda parte, se ha realizado una aplicación práctica tomando como referencia la gran obra universal “La Odisea”, cuya intención es mostrar la utilidad del videojuego como complemento educativo.

  1. LA WEBQUEST COMO INNOVACIÓN

    OpenAIRE

    Sábat-Molina, Gloria

    2013-01-01

    La evolución de la sociedad trae consigo una serie de cambios e innovaciones que repercuten en los planteamientos y el desarrollo de todas las actividades, también las educativas, en este trabajo analizaremos el impacto de esta evolución en la educación, tomando como base el estudio de la WebQuest como fruto de los avances en las tecnologías de la información y la comunicación, así como la innovación que representa su utilización en las aulas. La WebQuest se presenta como una actividad inn...

  2. Arbuscular Mycorrhizal Fungus Species Dependency Governs Better Plant Physiological Characteristics and Leaf Quality of Mulberry (Morus alba L.) Seedlings.

    Science.gov (United States)

    Shi, Song-Mei; Chen, Ke; Gao, Yuan; Liu, Bei; Yang, Xiao-Hong; Huang, Xian-Zhi; Liu, Gui-Xi; Zhu, Li-Quan; He, Xin-Hua

    2016-01-01

    Understanding the synergic interactions between arbuscular mycorrhizal fungi (AMF) and its host mulberry (Morus alba L.), an important perennial multipurpose plant, has theoretical and practical significance in mulberry plantation, silkworm cultivation, and relevant textile industry. In a greenhouse study, we compared functional distinctions of three genetically different AMF species (Acaulospora scrobiculata, Funneliformis mosseae, and Rhizophagus intraradices) on physiological and growth characteristics as well as leaf quality of 6-month-old mulberry seedlings. Results showed that mulberry was AMF-species dependent, and AMF colonization significantly increased shoot height and taproot length, stem base and taproot diameter, leaf and fibrous root numbers, and shoot and root biomass production. Meanwhile, leaf chlorophyll a or b and carotenoid concentrations, net photosynthetic rate, transpiration rate and stomatal conductance were generally significantly greater, while intercellular CO2 concentration was significantly lower in AMF-inoculated seedlings than in non-AMF-inoculated counterparts. These trends were also generally true for leaf moisture, total nitrogen, all essential amino acids, histidine, proline, soluble protein, sugar, and fatty acid as they were significantly increased under mycorrhization. Among these three tested AMFs, significantly greater effects of AMF on above-mentioned mulberry physiological and growth characteristics ranked as F. mosseae > A. scrobiculata > R. intraradices, whilst on mulberry leaf quality (e.g., nutraceutical values) for better silkworm growth as F. mosseae ≈A. scrobiculata > R. intraradices. In conclusion, our results showed that greater mulberry biomass production, and nutritional quality varied with AMF species or was AMF-species dependent. Such improvements were mainly attributed to AMF-induced positive alterations of mulberry leaf photosynthetic pigments, net photosynthetic rate, transpiration rate, and N

  3. White popular (Populus alba L.) - Litter impact on chemical and biochemical parameters related to nitrogen cycle in contaminated soils

    Energy Technology Data Exchange (ETDEWEB)

    Ciadamidaro, L.; Madejon, P.; Cabrera, F.; Madejon, E.

    2014-06-01

    Aim of study: The aim of this study was to determine the effect of litter from Populus alba on chemical and biochemical properties related to the N cycle in soils with different pH values and trace element contents. We hypothesized that this litter would influence several parameters related to the N cycle and consequently to soil health. Area of study: we collected two reforested contaminated soils of different pH values (AZ pH 7.23 and DO pH 2.66) and a non-contaminated soil (RHU pH 7.19). Materials and methods: Soil samples were placed in 2,000 cm{sup 3} microcosms and were incubated for 40 weeks in controlled conditions. Each soil was mixed with its corresponding litter, and soils without litter were also tested for comparison. Ammonium (NH{sub 4}{sup 4}+-N) and nitrate (NO{sub 3}{sup -} -N) content, potential nitrification rate (PNR), microbial biomass nitrogen (MBN), protease activity, and several chemical properties such as pH, available trace element concentrations (extracted with 0.01 M CaCl{sub 2}) were determined at different times of incubation. Main results: Values of available trace elements did not vary during the incubation and were always higher in acid soil. In neutral soils litter presence increased values of Kjeldahl-N, NO{sub 3} –-N content, potential nitrification rate (PNR), microbial biomass nitrogen (MBN) and protease activity. Presence of trace elements in neutral soils did not alter the parameters studied. However, acidic pH and high content of available trace elements strongly affected NH{sub 4}{sup +}-N and NO{sub 3}{sup -} -N, microbial biomass N and protease activity. Research highlights: Our results showed the negative effect of the acidity and trace element availability in parameters related with the N-cycle. (Author)

  4. Metabolic Characteristics in Meal of Black Rapeseed and Yellow-Seeded Progeny of Brassica napus-Sinapis alba Hybrids.

    Science.gov (United States)

    Jiang, Jinjin; Wang, Yue; Xie, Tao; Rong, Hao; Li, Aimin; Fang, Yujie; Wang, Youping

    2015-01-01

    Breeding of yellow-seeded rapeseed (Brassica napus) is preferred over black-seeded rapeseed for the desirable properties of the former. This study evaluated the metabolites and nutritive values of black-seeded rapeseed meal and yellow-seeded meal from the progeny of a B. napus-Sinapis alba hybrid. Yellow-seed meal presented higher protein (35.46% vs. 30.29%), higher sucrose (7.85% vs. 7.29%), less dietary fiber (26.19% vs. 34.63%) and crude fiber (4.56% vs. 8.86%), and less glucosinolates (22.18 vs. 28.19 μmol/g) than black-seeded one. Amounts of ash (3.65% vs. 4.55%), phytic acid (4.98% vs. 5.60%), and total polyphenols (2.67% vs. 2.82%) were decreased slightly in yellow-seeded meal compared with black-seeded meal. Yellow-seeded meal contained more essential amino acids than black-seeded meal. Levels of the mineral elements Fe, Mn, and Zn in yellow-seeded meal were higher than black-seeded meal. By contrast, levels of P, Ca, and Mg were lower in yellow-seeded meal. Moreover, yellow-seeded meal showed lower flavonol (kaempferol, quercetin, isorhamnetin, and their derivatives) content than black-seeded meal. Comparison of metabolites between yellow and black rapeseed confirmed the improved nutritional value of meal from yellow-seeded B. napus, and this would be helpful to the breeding and improvement of rapeseed for animal feeding. PMID:26633322

  5. Use of dimethyldioxirane in the epoxidation of the main constituents of the essential oils obtained from Tagetes lucida, Cymbopogon citratus, Lippia alba and Eucalyptus citriodora.

    Science.gov (United States)

    Veloza, Luz A; Orozco, Lina M; Sepúlveda-Arias, Juan C

    2011-07-01

    Dimethyldioxirane (DMDO), a widely used oxidant in organic synthesis is considered an environmentally friendly oxygen transfer reagent because acetone is the only byproduct formed in its oxidation reactions. This work describes the isolation of the main constituents (terpenes) in the essential oils obtained from Tagetes lucida, Cymbopogon citratus, Lippia alba and Eucalyptus citriodora, their epoxidation with DMDO in acetone solution and the characterization of the resulting epoxides by GC-MS (EI) and NMR. This is one of the first reports involving the application of dioxirane chemistry to essential oils in order to generate modified compounds with potential uses in several areas of medicine and industry. PMID:21834225

  6. The allelopathic effect of the black nut leaves (Juglans nigra L. over the species of moon – raddish (Raphanus sativus L. and white mustard (Sinapis alba L.

    Directory of Open Access Journals (Sweden)

    Sorina CORBU

    2006-05-01

    Full Text Available The present experiment is a research on the effect of the allelopathic substances in the leaves of the black nut (Juglans nigra L. over the species of white mustard (Sinapis alba L. and the moon – raddish (Raphanus sativus L.. We have prepared a watery extract of a concentration of 5, 15, 25, 50, 75 and 100% from the leaves in different seasons (spring, autumn and winter. The watery extract presents an inhibitory effect over the germination and growth of the plants subdued to experiments, especialy over the leaves collected in spring.

  7. Normal xeroradiographic and radiographic anatomy of the great horned owl (Bubo virginianus), with special reference to the barn owl (Tyto alba)

    International Nuclear Information System (INIS)

    The purpose of this study was to provide a reference for xeroradiographic and conventional radiographic anatomy of the great horned owl (Bubo virginianus) as a representative of the avian Order Strigiformes. The head, body, wing, and pelvic limb of three adult birds were radiographed using xeroradiographic and conventional radiographic techniques. Twelve xeroradiographs and their corresponding conventional radiographs were selected, and the xeroradiographs labeled to illustrate normal anatomy. Selected views of the barn owl (Tyto alba) were included to illustrate significant differences between this and other species of owls

  8. Electrophysiological Responses and Reproductive Behavior of Fall Webworm Moths (Hyphantria cunea Drury) are Influenced by Volatile Compounds from Its Mulberry Host (Morus alba L.).

    Science.gov (United States)

    Tang, Rui; Zhang, Feng; Zhang, Zhong-Ning

    2016-01-01

    Hyphantria cunea (Drury) is an invasive pest of Morus alba L. in China. β-ocimene and cis-2-penten-1-ol among eleven electro-physiologically active leaf volatiles from M. alba have been reported to influence captures of Hyphantria cunea moths when added into sex pheromone traps. This study further investigated influences of volatile types and their dosages on the electro-physiological responses in the antennae of male and female moths, as well as on mating and oviposition behaviors. Females were, regardless of dosages, more sensitive to β-ocimene and cis-2-penten-1-ol in electro-physiological response tests than males. For males, a dose response was detected, i.e., a dosage of 10 μg and 100 μg of either chemical stimulated higher electric response in their antennae than 1 μg. Moth pairs either exposed respectively to a herbivore-induced M. alba volatile blend (HIPV), to a mechanically-damaged M. alba volatile blend (MDV), to β-ocimene, to cis-2-penten-1-ol, or to pentane as a control showed that pairs exposed to β-ocimene most likely mated, followed by HIPV blends and least by the other volatiles or the control. In contrast, β-ocimene induced about 70% of the female oviposition behaviors and was nearly 4.5 times the oviposition rate than cis-2-penten-1-ol and 2 times than the control. However, none of the chemicals had any effect on the 48 h fecundity or on egg sizes. In conclusion, β-ocimene from mulberry plants alone could promote mating and oviposition in H. cunea at a dosage of 1 mg. The results indicate that reproductive behaviors of H. cunea moths can be enhanced through HIPV blends and β-ocimene induced by feeding of larvae. This contra phenomenon has revealed a different ecology in this moth during colonizing China as local pests would commonly be repelled by herbivore induced chemicals. These chemicals can be used for the development of biological control approaches such as being used together with sex pheromone traps. PMID:27153095

  9. Electrophysiological Responses and Reproductive Behavior of Fall Webworm Moths (Hyphantria cunea Drury are Influenced by Volatile Compounds from Its Mulberry Host (Morus alba L.

    Directory of Open Access Journals (Sweden)

    Rui Tang

    2016-05-01

    Full Text Available Hyphantria cunea (Drury is an invasive pest of Morus alba L. in China. β-ocimene and cis-2-penten-1-ol among eleven electro-physiologically active leaf volatiles from M. alba have been reported to influence captures of Hyphantria cunea moths when added into sex pheromone traps. This study further investigated influences of volatile types and their dosages on the electro-physiological responses in the antennae of male and female moths, as well as on mating and oviposition behaviors. Females were, regardless of dosages, more sensitive to β-ocimene and cis-2-penten-1-ol in electro-physiological response tests than males. For males, a dose response was detected, i.e., a dosage of 10 μg and 100 μg of either chemical stimulated higher electric response in their antennae than 1 μg. Moth pairs either exposed respectively to a herbivore-induced M. alba volatile blend (HIPV, to a mechanically-damaged M. alba volatile blend (MDV, to β-ocimene, to cis-2-penten-1-ol, or to pentane as a control showed that pairs exposed to β-ocimene most likely mated, followed by HIPV blends and least by the other volatiles or the control. In contrast, β-ocimene induced about 70% of the female oviposition behaviors and was nearly 4.5 times the oviposition rate than cis-2-penten-1-ol and 2 times than the control. However, none of the chemicals had any effect on the 48 h fecundity or on egg sizes. In conclusion, β-ocimene from mulberry plants alone could promote mating and oviposition in H. cunea at a dosage of 1 mg. The results indicate that reproductive behaviors of H. cunea moths can be enhanced through HIPV blends and β-ocimene induced by feeding of larvae. This contra phenomenon has revealed a different ecology in this moth during colonizing China as local pests would commonly be repelled by herbivore induced chemicals. These chemicals can be used for the development of biological control approaches such as being used together with sex pheromone traps.

  10. APPLICATION OF ESSENTIAL OIL OF ARTEMISIA HERBA ALBA AS GREEN CORROSION INHIBITOR FOR STEEL IN 0.5 M H2SO4

    OpenAIRE

    O. OUACHIKH; A. BOUYANZER; M. BOUKLAH; J.-M. DESJOBERT; Costa, J; Hammouti, B.; L. MAJIDI

    2009-01-01

    Essential oil from Artemisia herba alba (Art) was hydrodistilled and tested as corrosion inhibitor of steel in 0.5 M H2SO4 using weight loss measurements and electrochemical polarization methods. Results gathered show that this natural oil reduced the corrosion rate by the cathodic action. Its inhibition efficiency attains the maximum (74%) at 1 g/L. The inhibition efficiency of Arm oil increases with the rise of temperature. The adsorption isotherm of natural product on the steel has been de...

  11. 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.

    OpenAIRE

    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 rape.Sexual hybridization between B.napus and R. sativus did not result in hybrid plants, whereas from about 800 crosses between B.napus and the amphidiploid xBrassicoraphanus Sageret 284 F 1 hybrid...

  12. The allelopathic effect of the black nut leaves (Juglans nigra L.) over the species of moon – raddish (Raphanus sativus L.) and white mustard (Sinapis alba L.)

    OpenAIRE

    Sorina CORBU; Monica SIPOS

    2006-01-01

    The present experiment is a research on the effect of the allelopathic substances in the leaves of the black nut (Juglans nigra L.) over the species of white mustard (Sinapis alba L.) and the moon – raddish (Raphanus sativus L.). We have prepared a watery extract of a concentration of 5, 15, 25, 50, 75 and 100% from the leaves in different seasons (spring, autumn and winter). The watery extract presents an inhibitory effect over the germination and growth of the plants subdued to experiments,...

  13. ALBA - Alianza del Pacífico : Modelos antagónicos de integración hacial el interior de América Latina

    OpenAIRE

    Giusiano, Juan Emilio

    2014-01-01

    América Latina en los últimas década asistió a un momento de auge de la integración regional, Multiples son los ejemplos en tal sentido MERCOSUR, CAN, CELAC, UNASUR, entre otros procesos que buscaron coordinar las fuerzas productivas, económicas y políticas hacia el interior del subcontinente. En estos procesos los objetivos planteados y la forma de alcanzarlos han marcado la principal diferenciación entre bloques, el ejemplo más concreto es ALBA y La Alinaza del Pacífico modelos de integr...

  14. Cromatografia em camada fina de extratos de três quimiotipos de Lippia alba (Mill) N.E.Br. (erva-cidreira)

    OpenAIRE

    L.S. Julião; E.S. Tavares; C.L.S. Lage; S.G. Leitão

    2003-01-01

    O presente trabalho apresenta os cromatogramas em camada fina dos óleos essenciais, do extrato etanólico e do extrato diclorometano de folhas de três quimiotipos de Lippia alba. Os quimiotipos foram denominados I, II e III para as diferenças no constituinte majoritário dos seus óleos essenciais: citral, carvona e linalol, respectivamente. O óleo e os extratos foram comparados com padrões de citral, carvona e linalol. Etanol e diclorometano podem ser usados para extração desde que ambos os ext...

  15. Notas sobre la alimentación de Tyto alba (Lechuza común) en aspe (Alicante), a 21 de septiembre de 1954

    OpenAIRE

    Valverde Gómez, José Antonio, 1926-2003

    2008-01-01

    Notas sobre la alimentación de Tyto alba (Lechuza común) en Aspe (Alicante), a 21 de septiembre de 1954. Se incluyen un dibujo de la ubicación del nido y datos del análisis de 141 egagrópilas y diversos restos dispersos en el nido. Entre las presas se hallaron escarabajos, lagartijas, los siguientes mamíferos: Apodemus sp. (Ratón), Crocidura sp. (Musaraña), Eliomys sp. (Lirón), Microtinae, Miniopterus schreibersi (Murciélago de cueva), Mus spicilegus (Ratón), Pipistrellus sp. (Murciélago), Ra...

  16. Methods of quantification by means of spectroscopy of nuclear magnetic resonance and gas chromatography of the active principles of Justice pectoralis Jacq. Acanthaceae and Lippia alba (Mill.) N.E.Brownw ex Brit and Wils Verbenaceae

    International Nuclear Information System (INIS)

    The quality control of the vegetable material, presence and concentration of the active principles of Justice pectoralis and Lippia alba were studied for the use and marketing as herbal products. The method of analysis of the Justice pectoralis and Lippia alba was carried out by means of proton nuclear magnetic resonance spectroscopy and the gas chromatography. Coumarin and essential oils were determinate in the plants extracts. Different samples were collected throughout one year to evaluate the variation of concentration of the active principles of the plant and there was evaluated a method of extraction of solvents

  17. Evaluación de la actividad anti-candida y anti-aspergillus de aceites esenciales de lippia alba (miller) n.e brown quimiotipo carvonalimoneno y su asociación con sus componentes mayoritarios

    OpenAIRE

    Jehidys Montiel; Ana Cecilia Mesa Arango; Camilo Durán; Juan Gabriel Bueno; Liliana Betancur Galvis; Elena Stashenko

    2007-01-01

    Las plantas son fuentes de metabolitos secundarios bioactivos y los aceites esenciales de Lippia alba están mostrando en los últimos años actividad antimicótica. En este estudio la actividad antifúngica de cinco aceites de Lippia Alba (Miller) N.E Brown quimiotipo carvona- limoneno provenientes de diferentes partes del país fueron evaluados mediante la determinación de la concentración mínima inhibitoria (CMI). Para tal fin se utilizaron las técnicas de microdilución en cald...

  18. Avaliação agronômica e identificação de quimiotipos de erva cidreira no Distrito Federal Agronomic evaluation and identification of Lippia alba chemotypes from Distrito Federal, Brazil

    Directory of Open Access Journals (Sweden)

    Hermes Jannuzzi

    2010-12-01

    Full Text Available Com o objetivo de avaliar o comportamento agronômico, o potencial de rendimento de óleo essencial e identificar os quimiotipos de 16 acessos de Lippa alba (erva cidreira da coleção da Universidade de Brasília foi conduzido um experimento de campo em Latossolo Vermelho, sob irrigação por gotejamento na região do Cerrado do Distrito Federal. Foram avaliados a época de florescimento, hábito de crescimento, área foliar, comprimento da haste, massa fresca de folhas e hastes, massa foliar seca, teor e rendimento de óleo essencial e perfil aromático. O óleo essencial foi extraído por hidrodestilação em aparelho de Clevenger modificado e os constituintes identificados e quantificados através de cromatografia em fase gasosa acoplada a espectrometria de massas. O delineamento experimental utilizado foi de blocos ao acaso, com três repetições, contendo três plantas úteis por parcela. Foram identificados os quimiotipos citral-limoneno, citral-mirceno, limoneno-carvona, citral, linalol, mirceno e linalol-limoneno. Os acessos apresentaram teores máximos de linalol de 89,8% (L.16; mirceno de 47,6% (L.37; limoneno de 36,0%, carvona de 46,9% (L.27 e citral de 56,7% (L.17. Os genótipos com maiores áreas foliares e maiores comprimentos de hastes tenderam a apresentar maiores teores de óleo e maior concentração de linalol. A concentração de óleo foi inversamente proporcional à produção de massa foliar seca. Os acessos que apresentaram os maiores rendimentos dos compostos majoritários do óleo essencial foram: L.16 (0,77 g pl-1, como fonte potencial para a produção de linalol; L.17 (0,17 g pl-1, como fonte de mirceno; L. 27 (0,17 g pl-1, como fonte de limoneno e de carvona (0,21 g pl-1 e L.38 (0,24 g pl-1, como fonte de citral.The main objective of this work was to describe the essential oil profile of 16 genotypes of Lippia alba from the germplasm collection of the Universidade de Brasília and to analyze its potential of

  19. The effect of air pollution and other environmental stressors on leaf fluctuating asymmetry and specific leaf area of Salix alba L

    Energy Technology Data Exchange (ETDEWEB)

    Wuytack, Tatiana, E-mail: tatiana.wuytack@ua.ac.be [Department of Bioscience Engineering, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp (Belgium); Wuyts, Karen, E-mail: karen.wuyts@ugent.be [Department of Bioscience Engineering, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp (Belgium); Laboratory of Forestry, Department of Forest and Water Management, Ghent University, Geraardsbergsesteenweg 267, B-9090 Gontrode (Melle) (Belgium); Van Dongen, Stefan, E-mail: stefan.vandongen@ua.ac.be [Department of Biology, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp (Belgium); Baeten, Lander, E-mail: lander.baeten@ugent.be [Laboratory of Forestry, Department of Forest and Water Management, Ghent University, Geraardsbergsesteenweg 267, B-9090 Gontrode (Melle) (Belgium); Kardel, Fatemeh, E-mail: fatemeh.kardel@ua.ac.be [Department of Bioscience Engineering, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp (Belgium); Verheyen, Kris, E-mail: kris.verheyen@ugent.be [Laboratory of Forestry, Department of Forest and Water Management, Ghent University, Geraardsbergsesteenweg 267, B-9090 Gontrode, Melle (Belgium); Samson, Roeland, E-mail: roeland.samson@ua.ac.be [Department of Bioscience Engineering, University of Antwerp, Groenenborgerlaan 171, B-2020 Antwerp (Belgium)

    2011-10-15

    We aimed at evaluating the effect of low-level air pollution on leaf area fluctuating asymmetry (FAA) and specific leaf area (SLA) of Salix alba L., taking into account other environmental factors. Cuttings were grown in standardized conditions in the near vicinity of air quality measuring stations in Belgium. Variability of SLA and FAA between measuring stations explained 83% and 7.26%, respectively, of the total variability. FAA was not influenced by air pollution or environmental factors such as shading, herbivory, air temperature and humidity. SLA was increased by an increase in shadow, while NO{sub x} and O{sub 3} concentrations had only a marginal influence. The influence of SO{sub 2} concentration was negligible. Although our data analysis suggests a relationship between SLA and NO{sub x}/O{sub 3} concentration, the absence of a straightforward relationship between FAA and SLA and air pollution still questions the usefulness of these bio-indicators for monitoring air pollution. - Highlights: > Leaf characteristics of white willow as possible bio-indicators for air quality. > Fluctuating asymmetry is not a good bio-indicator for monitoring the air quality. > Shadow increases specific leaf area. > NO{sub x} and O{sub 3} change specific leaf area of white willow. - Specific leaf area of S. alba increased with increasing shade and, in less extent, with increasing NO{sub x} and decreasing O{sub 3} concentration, while leaf asymmetry did not respond to air pollution

  20. The effect of air pollution and other environmental stressors on leaf fluctuating asymmetry and specific leaf area of Salix alba L

    International Nuclear Information System (INIS)

    We aimed at evaluating the effect of low-level air pollution on leaf area fluctuating asymmetry (FAA) and specific leaf area (SLA) of Salix alba L., taking into account other environmental factors. Cuttings were grown in standardized conditions in the near vicinity of air quality measuring stations in Belgium. Variability of SLA and FAA between measuring stations explained 83% and 7.26%, respectively, of the total variability. FAA was not influenced by air pollution or environmental factors such as shading, herbivory, air temperature and humidity. SLA was increased by an increase in shadow, while NOx and O3 concentrations had only a marginal influence. The influence of SO2 concentration was negligible. Although our data analysis suggests a relationship between SLA and NOx/O3 concentration, the absence of a straightforward relationship between FAA and SLA and air pollution still questions the usefulness of these bio-indicators for monitoring air pollution. - Highlights: → Leaf characteristics of white willow as possible bio-indicators for air quality. → Fluctuating asymmetry is not a good bio-indicator for monitoring the air quality. → Shadow increases specific leaf area. → NOx and O3 change specific leaf area of white willow. - Specific leaf area of S. alba increased with increasing shade and, in less extent, with increasing NOx and decreasing O3 concentration, while leaf asymmetry did not respond to air pollution

  1. Age, growth and length-weight relationship of the white skate, Rostroraja alba (Linnaeus, 1758) (Chondrichthyans:Rajidae), from the Gulf of Gabes (Tunisia, Central Mediterranean)

    Institute of Scientific and Technical Information of China (English)

    Hasna Kadri; Sondes Marouani; Mohamed Nejmeddine Bradai; Abderrahmen Bouan; Eric Morize

    2014-01-01

    Objective:To investigate the length distribution, sex ratio, length-weight relationship, age and growth of Rostroraja alba in the Gulf of Gabes. Methods:This study estimated age and growth of the white skate, Rostroraja alba by counting vertebral band pairs from 112 specimens taken by commercial fisheries during 2006-2009 from the Gulf of Gabes (Southern Tunisia, Central Mediterranean Sea). Results: This is the first and only known information in regards to the age and growth of this species in Tunisia. Vertebra diameter was strongly correlated with total length and age, which were expressed by linear or cubic regression equations. The oldest female in this study was 35 years and 160 cm, whereas the oldest male was 32 years and 150 cm. The von Bertalanffy growth parameters were TL∞=(202.26±3.40) cm, K=(0.040±0.038)/year and t0=(1.84±0.01) 10-1/year for females and TL∞=(198.60±3.61) cm, K=(0.060±0.076)/year and t0=(1.28±0.04)/year for males. Conclusions: This study would be an effective tool for fishery biologists, managers and conservationists to initiate management strategies and regulations for the sustainable conservation of the remaining stocks of this species in the Gulf of Gabes (Southern Tunisia) ecosystem.

  2. Composition and intraspecific chemical variability of the essential oil from Artemisia herba-alba growing wild in a Tunisian arid zone.

    Science.gov (United States)

    Mighri, Hédi; Akrout, Ahmed; El-jeni, Hajer; Zaidi, Slah; Tomi, Félix; Casanova, Joseph; Neffati, Mohamed

    2010-11-01

    The intraspecific chemical variability of essential oils (50 samples) isolated from the aerial parts of Artemisia herba-alba Asso growing wild in the arid zone of Southeastern Tunisia was investigated. Analysis by GC (RI) and GC/MS allowed the identification of 54 essential oil components. The main compounds were β-thujone and α-thujone, followed by 1,8-cineole, camphor, chrysanthenone, trans-sabinyl acetate, trans-pinocarveol, and borneol. Chemometric analysis (k-means clustering and PCA) led to the partitioning into three groups. The composition of two thirds of the samples was dominated by α-thujone or β-thujone. Therefore, it could be expected that wild plants of A. herba-alba randomly harvested in the area of Kirchaou and transplanted by local farmers for the cultivation in arid zones of Southern Tunisia produce an essential oil belonging to the α-thujone/β-thujone chemotype and containing also 1,8-cineole, camphor, and trans-sabinyl acetate at appreciable amounts. PMID:21072770

  3. PLASTICIDAD FENOTÍPICA EN Lippia alba (VERBENACEAE EN RESPUESTA A LA DISPONIBILIDAD HÍDRICA EN DOS AMBIENTES LUMÍNICOS

    Directory of Open Access Journals (Sweden)

    RODRÍGUEZ-LÓPEZ NELSON

    2008-04-01

    Full Text Available

    La plasticidad fenotípica es uno de los medios por los cuales las plantas pueden ajustar su morfología y fisiología, permitiéndoles enfrentar la heterogeneidad ambiental bajo condiciones naturales. El presente estudio evaluó la plasticidad fenotípica (PF en respuesta a la disponibilidad hídrica del suelo, bajo dos condiciones de luz, en clones de dos poblaciones de Lippia alba (Verbanaceae contrastantes en la heterogeneidad del régimen de precipitación en su hábitat natural, a través de normas de reacción morfológicas y de asignación de biomasa. El experimento se desarrolló en condiciones semicontroladas en invernadero, siguiendo un diseño experimental completamente aleatorizado, bajo un esquema factorial dos * dos (disponibilidad hídrica y poblaciones. La mayoría de los caracteres evaluados mostraron PF. No obstante, algunos caracteres de la población proveniente de condiciones naturales más homogéneas presentaron una reducción de plasticidad marcada. Lo anterior sugiere una posible relación entre el amplio rango de distribución de Lippia alba, PF y eventos de adaptación local.

  4. Gnathostomiasis in Thailand: a survey on intermediate hosts of Gnathostoma spp. with special reference to a new type of larvae found in Fluta alba.

    Science.gov (United States)

    Setasuban, P; Nuamtanong, S; Rojanakittikoon, V; Yaemput, S; Dekumyoy, P; Akahane, H; Kojima, S

    1991-12-01

    To clarify current status of gnathostomiasis in Thailand, a survey on intermediate hosts has been carried out at various localities since 1987. It was found that Fluta alba (Fresh water eel) as well as Channa striata (snake-headed fish) might be important in playing a role of transmitting the infection either among humans or reservoir animals. During the three years from 1987 to 1989, larvae of Gnathostoma spinigerum were found in 80-100% of F. alba obtained from markets in Nakhon Nayok, with a maximum recovery of 2,582 larvae per eel. Among larvae found in these eels, five were peculiar in possessing four rows of hooklets with complicated branches at the base. Epithelial cells of the intestine of these larvae contained 1-2 nuclei. These observations indicate that the larvae are different from those of reported species of Gnathostoma from Thailand including G. spinigerum, suggesting a possibility of the advanced third-stage larvae of G. malaysiae. PMID:1822890

  5. Comparative Phytochemical Analysis of Essential Oils from Different Biological Parts of Artemisia herba alba and Their Cytotoxic Effect on Cancer Cells.

    Directory of Open Access Journals (Sweden)

    Mounir Tilaoui

    Full Text Available Carrying out the chemical composition and antiproliferative effects against cancer cells from different biological parts of Artemisia herba alba.Essential oils were studied by gas chromatography coupled to mass spectrometry (GC-MS and their antitumoral activity was tested against P815 mastocytoma and BSR kidney carcinoma cell lines; also, in order to evaluate the effect on normal human cells, oils were tested against peripheral blood mononuclear cells PBMCs.Essential oils from leaves and aerial parts (mixture of capitulum and leaves were mainly composed by oxygenated sesquiterpenes 39.89% and 46.15% respectively; capitulum oil contained essentially monoterpenes (22.86% and monocyclic monoterpenes (21.48%; esters constituted the major fraction (62.8% of stem oil. Essential oils of different biological parts studied demonstrated a differential antiproliferative activity against P815 and BSR cancer cells; P815 cells are the most sensitive to the cytotoxic effect. Leaves and capitulum essential oils are more active than aerial parts. Interestingly, no cytotoxic effect of these essential oils was observed on peripheral blood mononuclear cells.Our results showed that the chemical composition variability of essential oils depends on the nature of botanical parts of Artemisia herba alba. Furthermore, we have demonstrated that the differential cytotoxic effect depends not only on the essential oils concentration, but also on the target cells and the botanical parts of essential oils used.

  6. Polyphenols Variation in Fruits of the Susceptible Strawberry Cultivar Alba during Ripening and upon Fungal Pathogen Interaction and Possible Involvement in Unripe Fruit Tolerance.

    Science.gov (United States)

    Nagpala, Ellaine Grace; Guidarelli, Michela; Gasperotti, Mattia; Masuero, Domenico; Bertolini, Paolo; Vrhovsek, Urska; Baraldi, Elena

    2016-03-01

    Strawberry (Fragaria × ananassa) fruit contains high concentrations of health-promoting phenolic compounds, playing important roles for the fruit ontogenic tolerance to fungi. In the highly susceptible cultivar Alba, the two major strawberry fungal pathogens, Colletotrichum acutatum and Botrytis cinerea, displayed disease symptoms only at red ripe stages because immature fruits are tolerant to diseases. We analyzed and compared the variation of 47 polyphenols in the surface of unripe and ripe Alba fruits upon 24 and 48 h of C. acutatum and B. cinerea infection or mock inoculation. Significant alteration in phenolic content was detected only in white infected fruit, with differences specific for each pathogen. The expression analysis of phenylpropanoid, flavonoid, and shikimate pathway genes showed in only a few cases correlation with the relative metabolite abundance. The alteration in phenolic content and the lack of consistency with gene expression data are discussed in light of previously reported metabolome data of different susceptible and resistant strawberry genotypes. PMID:26895094

  7. Developmental profile of sinalbin (p-hydroxybenzyl glucosinolate) in mustard seedlings,Sinapis alba L., and its relationship to insect resistance.

    Science.gov (United States)

    Bodnaryk, R P

    1991-08-01

    Sinalbin was identified as a chemical component of insect anti-xenosis and antibiosis resistance mechanisms in seedlings ofSinapis alba by DEAE-Sephadex chromatography, HPLC, treatment with sulfatase and myrosinase, various feeding tests using artificial and natural substrates, and by measuring sinalbin concentrations in cotyledons and leaves during seedling development. The effects of sinaibin on feeding were dependent upon the insect species and upon the rapidly changing profile of sinaibin concentrations in the developing seedling. The high concentrations of sinalbin found in young cotyledons (up to 20 mM) and leaves (up to 10 mM) deterred the feeding of the flea beetle,Phyllotreta cruciferae Goeze and larvae of the bertha armyworm,Mamestra configurata Walker. The protection that sinalbin confers upon the vulnerable, newly emerged seedling (and upon tiny, young leaves) appears critical for the first few days of survival ofS. alba under feeding pressure from flea beetles in the field. The lower concentrations of sinaibin found in older cotyledons and leaves (2-3 mM) offer little or no protection againstP. cruciferae and may actually stimulate the feeding of this crucifer specialist. These concentrations of sinaibin, however, are still effective in reducing the level of feeding by larvae of the more generalist feederM. configurata. PMID:24257879

  8. EFFECT OF PRE-STEAMING ON MASS TRANSFER PROPERTIES OF FIR WOOD (ABIES ALBA L.; A GYMNOSPERM SPECIES WITH TORUS MARGO PIT MEMBRANE

    Directory of Open Access Journals (Sweden)

    Hadi Dashti,

    2012-02-01

    Full Text Available In this research, the effect of pre-steaming on mass transfer properties, including air permeability and water vapor diffusivity of fir wood (Abies alba L., a gymnosperm species with torus margo pit membrane, was evaluated. The pre-steaming was performed at temperatures of 120, 140, and 160°C for 1 hour under a pressure of 2-3 bars. Then, the pre-steamed specimens were conventionally dried at a constant temperature of 160°C and a relative humidity of 50% to the final moisture content of 10%. Subsequently, the mass transfer properties of the dried specimens were measured in longitudinal and radial directions. Overall, the pre-steaming was found to be an effective modification method to improve the mass transfer properties of Abies alba L. The improvement was more remarkable for the air permeability as well as through the radial direction. The specimens steamed at the temperature of 160°C had higher mass transfer rates than those steamed at the temperatures of 120 and 140°C. Results of chemical analyses, FT-IR spectroscopy, and SEM imaging provide some explanations for the effects of pre-steaming.

  9. Pensando al agua como parte del paisaje

    Directory of Open Access Journals (Sweden)

    Lorena Salvatelli

    2009-12-01

    Full Text Available El objetivo de este trabajo es discutir la importancia de los estudios de arqueología terrestre y subacuática como parte de un mismo proceso de interpretación del pasado. Se entiende que el registro arqueológico puede hallarse actualmente en una variedad de ambientes tanto terrestres como subacuáticos a causa de varias razones, como por ejemplo las oscilaciones de los niveles de agua ocurridas entre el Pleistoceno Final y el Holoceno Medio. Por lo tanto, se propone que para su recuperación debe utilizarse una metodología adaptada al medio ambiente en el cual se encuentre. En este sentido, es importante la interpretación integral del paisaje para acceder a la comprensión de la diversidad ambiental en la que se puede emplazar un sitio arqueológico, y en consecuencia poder “bucear” un registro integrado.

  10. La realidad como materia novelable: Alejo Carpentier

    OpenAIRE

    Raquel Arias Careaga

    2007-01-01

    Desde que en 1897 Benito Pérez Galdós defendiera como materia prima legítima de la literatura «la vida misma, de donde el artista saca las ficciones que nos instruyen y embelesan» (Pérez Galdós, 1990: 159), el realismo como instrumento de indagación y análisis de la sociedad no ha dejado de crecer y expandirse. Realismo crítico, como este de Galdós, que implica una ampliación del concepto chato de «realidad», incluyendo en ella «recuerdos, sueños, imaginación, locura, símbolos» para contribui...

  11. La realidad como materia novelable: Alejo Carpentier

    Directory of Open Access Journals (Sweden)

    Raquel Arias Careaga

    2007-07-01

    Full Text Available Desde que en 1897 Benito Pérez Galdós defendiera como materia prima legítima de la literatura «la vida misma, de donde el artista saca las ficciones que nos instruyen y embelesan» (Pérez Galdós, 1990: 159, el realismo como instrumento de indagación y análisis de la sociedad no ha dejado de crecer y expandirse. Realismo crítico, como este de Galdós, que implica una ampliación del concepto chato de «realidad», incluyendo en ella «recuerdos, sueños, imaginación, locura, símbolos» para contribuir a la formación de un «realismo total» (Rodríguez Puértolas, 2000, II: 93, al que se une también la asimilación de enseñanzas esenciales como la que representa la narrativa de Cervantes: La novelística de Galdós hunde sus raíces en el mejor Cervantes, como puede verse en su peculiar sentido del humor y de la ironía, en la concepción perspectivista de la realidad y en tantas otras cosas, algunas de ellas en verdad fundamentales. Así el concepto de la Naturaleza y sus relaciones dialécticas con el ser humano; así el Amor como elemento vital y animador del orden cósmico, muy alejado del idealismo vulgar romántico (Ibid., 93.

  12. An energy-circuit population model for great egrets (Ardea alba) at Lake Okeechobee, Florida, U.S.A

    Science.gov (United States)

    Smith, Jeff P.

    1997-01-01

    I simulated the annual population cycles of Great Egrets (Ardea alba) at Lake Okeechobee, Florida, to provide a framework for evaluating the local population dynamics of nesting and foraging wading birds. The external forcing functions were solar energy, minimum air temperature, water depth, surface-water drying rate, and season. Solar input controlled the production of prey at moderate to high lake stages, but water area exerted primary control during a two-year drought. Modeling prey production as a linear function of water area resulted in underestimation of prey density during the drought, suggesting that prey organisms maintained high fecundity while concentrated in submerged vegetation at the lakeward fringe of the littoral zone. Simulation confirmed that large influxes of wading birds during the drought were the combined result of a regional refuge response and the availability of concentrated prey. Modeling immigration and emigration as primarily functions of the surface-water drying rate, rather than lake stage, resulted in a closer match of observed and simulated population trends for foraging birds, suggesting that the pattern of surface-water fluctuations was a more important factor than water depth. Simulation indicated an abrupt-threshold response rather than a linear association between foraging efficiency and low temperatures, which reduce activity levels of forage fishes. Great Egret breeder recruitment is primarily a function of prey availability, climate, and hydrologic trends, but simulation confirmed the concurrent involvement of a seasonal or physiological-readiness factor. An attractor function driven by high winter lake stages was necessary to reproduce observed patterns of breeder recruitment, suggesting that Great Egrets initiate nesting based on environmental cues that lead to peak food availability when nestlings are present. Poor correspondence of reproductive effort and nest productivity suggested that the drought compromised the birds

  13. THE EFFECT OF UVB RADIATION ON SERUM VITAMIN D AND IONIZED CALCIUM IN THE AFRICAN SPOONBILL (PLATALEA ALBA).

    Science.gov (United States)

    Woodhouse, Sarah J; Rick, Markus

    2016-06-01

    Metabolic bone disease (MBD) was diagnosed in two chicks produced by a captive breeding colony of African spoonbills (Platalea alba). The birds were housed indoor during the winter breeding season and had no access to natural sunlight. When the index cases occurred, the nesting birds and chicks had a mean 25-hydroxyvitamin D (25-OHD) concentration of 9.9 ± 2.7 nmol/L and a mean ionized calcium (iCa) concentration of 0.98 ± 0.12 mmol/L (winter pretreatment). For comparison purposes, serum was collected the following summer; mean 25-OHD was 20.8 ± 3.9 nmol/L and mean iCa was 1.32 ± 0.05 mmol/L (summer). During the following breeding season, ultraviolet B (UVB) lighting was provided to the flock, resulting in a mean 25-OHD of 19.0 ± 5.6 nmol/L and mean iCa of 1.23 ± 0.06 mmol/L (winter treatment 1). Both 25-OHD and iCa were significantly higher compared with winter pretreatment, and 25-OHD was not significantly different from summer, indicating that treatment during the winter months succeeded in increasing 25-OHD levels to summer levels. However, winter treatment 1 and summer iCa were significantly different. During the next breeding season (winter treatment 2), the birds were exposed to a light with higher UVB output. The mean 25-OHD of the flock was 16.5 ± 7.2 nmol/L, and the mean iCa increased to 1.34 ± 0.04 mmol/L. Both were comparable to summer values. Healthy chicks were hatched during both breeding seasons, and no further cases of MBD occurred during the course of the study. Provision of a UVB light source to captive African spoonbills maintained indoors during the winter months can increase 25-OHD and iCa to levels equivalent to those seen in the summer months, when birds have unrestricted access to natural sunlight. UVB lighting is recommended for all breeding spoonbills that do not have access to natural sunlight. PMID:27468015

  14. EFFECTS OF ECLIPTA ALBA AND BOERHAAVIA DIFFUSSA ON NORMAL BLOOD PRESSURE AND HYPERTENSION IN RATS AND THEIR COMPARISON WITH AMLODIPINE

    Directory of Open Access Journals (Sweden)

    Rakesh C. Verma*, Pratap Shankar, Shailendra Dwivedi and Rakesh K. Dixit

    2012-06-01

    Full Text Available Background: Hypertension is an immensely pervaded problem in today’s population and is a unanimous major risk factor for heart diseases. Various natural herbs have been found to control the hypertension exquisitely without causing any significant adverse effect. Eclipta alba (EA and Boerhaavia diffusa (BD are two herbaceous plants. EA is used to treat hepatic-dysfunction, hair diseases and anemia since ancient time. Similarly, BD is a great treatment-option for renal and urinary disorders. They have also been found quite effective in the safe treatment of hypertension. But studies in this respect are very scanty and confirmatory role of these herbs in hypertension is yet to be established. In the present study, effects of EA and BD on normal blood pressure (NBP and hypertension were studied. Their antihypertensive activities were also compared with those of Amlodipine (Amlo.Methods: Adult Wistar rats of both sexes, weighing 140-150 g were randomized equally to make 9 groups (6 rats/ group. First 6 groups were given high fat diet for 49 days to produce hypertension. Then drugs were given for next 45 days without stopping high fat diet. 7th, 8th & 9th groups were meant to see the effects of EA and BD on NBP; they were kept on normal diet and were given EA-200 mg/kg, BD-200 mg/kg, EA+BD (200 mg/kg of each respectively for first 45 days. SBP (systolic blood pressure was measured by ‘Tail-cuff method’ with the help of NIBP (non-invasive blood pressure measurement-controller machine.Results: All drugs showed significant antihypertensive activities. Rats on Amlo-10 mg/kg showed most significant reduction (39.54%, followed by rats on EA+BD (200mg/kg of each; 31.01% reduction, BD-200 mg/kg (28.91% reduction, EA-200 mg/kg (25.54% reduction, BD-100 mg/kg (20.68% reduction. EA, BD and EA+BD caused no significant reduction in NBP.Conclusion: To conclude, EA and BD comprise significant antihypertensive activities with no harmful effects on (reduction in

  15. Dibujo infantil como medio de diagnostico

    OpenAIRE

    González Hernando, Elisa

    2015-01-01

    Con este documento se pretende demostrar la importancia que tiene el dibujo infantil en el correcto desarrollo integral de las personas. Se estudia la importancia del dibujo y su valor a la hora de utilizarlo como método de diagnóstico ante determinados aspectos que pueden determinar la vida de una persona. En definitiva lo que se desarrolla en este trabajo de Fin de Grado es el papel que juega el dibujo como herramienta para el seguimiento del desarrollo de los individuos centrándonos ...

  16. EL DERECHO COMO COMPLEJIDAD DE SABERES DIVERSOS

    OpenAIRE

    María Isolina Dabove

    2011-01-01

    El motivo principal de este trabajo consiste en observar la estrecha vinculación que existe entre los distintos grados del saber y la configuración misma del mundo jurídico como objeto cultural. Así pues, desde esta perspectiva, se advierte que el Derecho puede ser considerado un fenómeno complejo, en gran medida, debido a los distintos tipos de conocimiento que intervienen en su construcción. El saber, en este marco, será entendido como aquel conjunto de información referida a hechos o abstr...

  17. Como si fuera posible recoger sentimientos

    OpenAIRE

    Vayreda Puigvert, Marian; Vallès Villanueva, Joan

    2011-01-01

    Se trata de una propuesta como resultado del trabajo conjunto entre la escuela de Arte Pigment y el ESPAI ZERO1 del Museu Comarcal de la Garrotxa, destinado exclusivamente a exposiciones temporales de creación contemporánea y como continuidad de propuestas anteriores de colaboración: REPLICA23 y SONESNAT JUNIOR. Com si fos possible recollir el sofriment es un proyecto de la artista Anna Manel.la, y se consideró una propuesta interesante y un reto para conversar, intercambiar y crear con los a...

  18. Lecturas y escrituras: la literatura como metatexto

    OpenAIRE

    Brunelli, Anahi Adelaida

    2004-01-01

    Si el ingreso a la Universidad demanda la adquisición de nuevos saberes pero también nuevas formas de adquirirlos, se hace, pues, necesario, utilizar métodos que favorezcan la diversidad de enfoques y perspectivas, la exploración de nuevas zonas en los textos, entendidas como lecturas y escrituras posibles, como accesos no excluyentes a la textualidad. Se trata de modificar los contratos de lectura previos mediante una experiencia de lectura productiva en la que el lector acceda al texto desd...

  19. PARP-1 como regulador del ciclo celular

    OpenAIRE

    Iglesias Vázquez, Pablo

    2015-01-01

    En el presente estudio hemos querido investigar las implicaciones biológicas de la interacción PARP-1/E2F-1 en escenarios en los que el factor de transcripción E2F-1 resulta de gran importancia como son el desarrollo embrionario y la oncogénesis. En este respecto, hemos demostrado que tanto PJ34, inhibidor de la actividad enzimática de PARP, como gosipol, inhibidor de las interacciones proteína-proteína, son capaces de reducir la actividad transcripcional de E2F-1 y la proli...

  20. La imagen del Inca como benefactor

    OpenAIRE

    Juan Miguel Espinoza Portocarrero

    2010-01-01

    A partir de tres crónicas coloniales y de tres visiones historiográficas sobre los incas producidas en el siglo XX, y apelando a las herramientas metodológicas de la historia de las categorías, se pretende rastrear los discursos sobre la imagen del Inca como benefactor de la sociedad andina. El objetivo es dar luces sobre los discursos históricos que entienden al Inca como un modelo ideal de autoridad política y su carácter de construcción social afianzada por la historiografía.

  1. De puertas adentro: la biblioteca como oasis

    OpenAIRE

    Domínguez Sanjurjo, María Ramona

    2006-01-01

    La comunicación habla de la necesaria renovación de la biblioteca pública en la actualidad y de la afirmación de su papel emergente en la sociedad contemporánea. Para desempeñar su nuevo rol, la biblioteca deberá reforzar su presencia ante los ciudadanos y agentes públicos y reorientar su oferta. Se señalan algunas de las actuaciones llevadas cabo en la BPE en Salamanca para afianzar su posición como lugar de encuentro, aprendizaje y debate y como espacio abierto a las ideas y a la crea...

  2. La desigualdad como texto: relatos docentes

    OpenAIRE

    Scabuzzo, Tomás

    2013-01-01

    Nuestra hipótesis de trabajo se orienta a la interpretación de la especificidad de la relación, en el marco de la desigualdad educativa, entre la escuela como texto y los sujetos pedagógicos (estudiantes y docentes) en términos de encuentro - desencuentro, diferencia, malestar, multivocidad, discontinuidad, tensión, equivocidad, malentendido, etc. Planteamos como metodología de trabajo un abordaje de tipo cualitativo. Nuestro universo de estudio para la realización de esta investigación de ca...

  3. Comparison of different extraction methods for the analysis of volatile secondary metabolites of Lippia alba (Mill.) N.E. Brown, grown in Colombia, and evaluation of its in vitro antioxidant activity.

    Science.gov (United States)

    Stashenko, Elena E; Jaramillo, Beatriz E; Martínez, Jairo René

    2004-01-30

    Hydrodistillation (HD), simultaneous distillation solvent extraction (SDE), microwave-assisted hydrodistillation (MWHD), and supercritical fluid (CO2) extraction (SFE) were employed to isolate volatile secondary metabolites from fresh leaves and stems of Colombian Lippia alba (Mill.) N.E. Brown. Kovàts indices, mass spectra or standard compounds were used to identify around 40 components in the various volatile fractions. Carvone (40-57%) was the most abundant component, followed by limonene (24-37%), bicyclosesquiphellandrene (5-22%), piperitenone (1-2%), piperitone (ca. 1.0%), and beta-bourbonene (0.6-1.5%), in the HD, SDE, MWHD, and SFE volatile fractions. Static headspace (S-HS), simultaneous purge and trap in solvent (CH2Cl2) (P&T), and headspace solid-phase microextraction (HS-SPME) were used to sample volatiles from fresh L. alba stems and leaves. The main components isolated from the headspace of the fresh plant material were limonene (27-77%), carvone (14-30%), piperitone (0.3-0.5%), piperitenone (ca. 0.4%), and beta-bourbonene (0.5-6.5%). The in vitro antioxidant activity of L. alba essential oil, obtained by hydrodistillation was evaluated by determination of hexanal, the main carbonyl compound released by linoleic acid subjected to peroxidation (1 mm Fe2+, 37 degrees C, 12 h), and by quantification of this acid as its methyl ester. Under the same conditions, L. alba HD-essential oil and Vitamin E exhibited similar antioxidant effects. PMID:14753676

  4. Study on Antidepressant Effect of Compatibility of Radix Bupleuri and Radix Paeoniae Alba%柴胡和白芍配伍抗抑郁作用的研究进展

    Institute of Scientific and Technical Information of China (English)

    李苒; 高杉; 于春泉

    2012-01-01

    To study the antidepressant effect of Radix Bupleuri and Radix Paeoniae Alba with the collation and analysis of literatures. Radix Bupleuri, Radix Paeoniae Alba and antidepressant as the subject headings were used to screen literatures from 1988 to 2012 in CNKI, and then make an overview of the antidepressant effect of Radix Bupleuri and Radix Paeoniae Alba according to chemical composition, pharmacology, clinical application and another several aspects. The active ingredient and material basis of the antidepressant effect of Radix Bupleuri and Radix Paeoniae Alba were introduced in order to provide literature reference for the study on the antidepressant effect of Radix Bupleuri and Radix Paeoniae Alba. There is broad prospect treating depression with Radix Bupleuri and Radix Paeoniae Alba, but the related research on the mechanisms of antidepressant effect of Radix Bupleuri and Radix Paeoniae Alba is less, and further research are need.%对柴胡和白芍的抗抑郁方面的相关研究进行文献整理和分析.检索的数据库为中国知网( CNKI),以柴胡、白芍、抗抑郁为主题词检索1988年-2012年的相关文献,筛选整理后按照化学组成、药理学研究、临床应用等几方面对柴胡和白芍的抗抑郁作用进行综述.介绍了柴胡和白芍抗抑郁的活性成分和物质基础等,从而对柴胡和白芍抗抑郁的研究提供文献参考.柴胡、白芍在治疗抑郁症方面具有广阔的前景,但其作用机制的相关研究较少,有待于学者们的进一步研究.

  5. Escribir como transgresión

    OpenAIRE

    Cristina Peri-Rossi

    1995-01-01

    La poeta uruguaya Cristina Peri-Rossi presenta en este artículo a las mujeres escritoras como primeras transgresoras, porque cuando estas pasan de objeto a sujeto literario trastornan las configuraciones tradicionales, creando confusión, desorden y locura, ya que se alteran las convenciones sociales y se subvierte el orden pretendidamente natural.

  6. El traductor como investigador. Tiempos turbulentos

    OpenAIRE

    Behiels, Lieve

    2013-01-01

    En esta contribución intento colmar la brecha entre un estudio científico de la traducción que se pretende distante de la actividad traductora y la práctica de la traducción como actividad investigadora.

  7. La biblioteca como editora de contenidos

    Directory of Open Access Journals (Sweden)

    Alonso-Arévalo, Julio

    2015-12-01

    Full Text Available Una de las características más innovadoras de la biblioteca del siglo 21 tiene que ver con la toma de una postura activa frente a la gestión y generación de contenidos. Con la llegada de la Web 2.0 las bibliotecas no sólo siguen salvaguardando y difundiendo información como han venido realizando a lo largo de su historia, también cada vez con más frecuencia crean nueva información con el objetivo de prestar los mejores servicios a sus ciudadanos, a través de recursos y servicios tales como la elaboración guías de investigación, boletines de alerta y novedades, recursos web, información a través de sus blogs, y como administradores de contenidos a través de repositorios y revistas de acceso abierto. Un paso más allá en esta dinámica tienen que ver con la biblioteca como editora y distribuidora de libros, especialmente en el ámbito local, siendo la impulsora, formadora, dinamizador y difusoras de las obras de los autores de su comunidad.

  8. La medicina tradicional como medicina ecocultural

    OpenAIRE

    Aparicio Mena, Alfonso Julio

    2005-01-01

    Los sistemas terap??uticos tradicionales responden a las culturas de los pueblos en los que surgen. En ellos, se concibe la naturaleza ??ntimamente ligada a la tradici??n. Salud es, para los miembros de las culturas tradicionales, bienestar como equilibrio entre el ser humano, la naturaleza, las creencias y la sociedad.

  9. Release Variation and Antibiotic Functions of Volatile Organic Compounds from Populus alba×P, berolinensis%银中杨挥发性有机物释放动态及其抑菌作用

    Institute of Scientific and Technical Information of China (English)

    郭阿君; 王志英; 邹丽

    2011-01-01

    Composition of volatile organic compounds (VOCs) emitted from Populus alba × P. Berolinensis and its seasonal variance were studied by SUMMA canister and GC-MS analysis. The effects of VOCs from P. Alba x P. Berolinensis on inhibiting the airborne microbes were examined by the settling plate technique. Results show that the major VOCs from P. Alba × P. Berolinensis are alkenes and alkanes. 1-pentyne is dominant in spring and autumn, and 2-chloro-l-propene is dominant in summer. The terpenes mainly include D-limonene and a-pinene in spring and autumn, as well as caryophyllene and cam phol in summer. VOCs emitted from P. Alba x P. Berolinensis can effectively inhibit the growth of airborne microbes, and the effect is the most obvious in summer.%利用SUMMA采样罐收集和气相色谱—质谱(GC-MS)技术分析鉴定银中杨(Populus alba×berolinensis)挥发性有机物组成及季节动态变化规律.采用自然沉降法测定银中杨挥发物对空气微生物的抑制作用.结果 表明:银中杨释放的挥发物以烷烃、烯烃类物质为主.春、秋两季以1-戊炔为主,夏季以2-氯-1-丙烯为主.春、秋释放的萜类物质以α-蒎烯、D-柠檬烯为主,夏季以石竹烯和龙脑为主.银中杨的自然挥发物能够有效地抑制空气中的细菌,尤以夏季抑茵作用最强.

  10. Los nematodos como indicadores ambientales en agroecosistemas

    Directory of Open Access Journals (Sweden)

    S. Sánchez-Moreno

    2013-01-01

    Full Text Available El suelo es una unidad básica en el funcionamiento y dinámica de los agroecosistemas, ya que proporciona el sustento físico y biológico para la producción vegetal. Aunque el efecto de las prácticas antropógenas sobre el componente abiótico del suelo está ampliamente documentado, existen pocas herramientas capaces de medir el impacto de estas prácticas en la biodiversidad del ecosistema edáfico. Los nematodos del suelo constituyen un grupo de invertebrados de elevada importancia ecológica que presentan atributos que les convierte en valiosas herramientas como indicadores biológicos. Su extraordinaria diversidad taxonómica y funcional, su abundancia y ubiquidad, y la rápida respuesta de las comunidades de nematodos edáficos a perturbaciones ambientales, como el laboreo o la aplicación de insumos químicos, han convertido la nematofauna en un indicador clave en la evaluación del efecto del manejo agrario sobre los ecosistemas. La participación de los nematodos en múltiples eslabones funcionales dentro de la red trófica edáfica hace que sean también indicadores de numerosos procesos ecológicos y biológicos, como el mantenimiento del ciclo de nutrientes o el control de especies plaga.Este trabajo sintetiza los resultados obtenidos en la utilización de la nematofauna como indicadora de perturbaciones ambientales en los agroecosistemas, y expone una breve reseña del estado de la Nematología como disciplina científica en España.

  11. La dieta de la lechuza (Tyto alba) (Aves: Strigiformes) en hábitats naturales y antropogénicos de la región central de Cuba Diet of Barn Owl (Tyto alba) (Aves: Strigiformes) in natural and anthropogenic habitat in central Cuba

    OpenAIRE

    Abel Hernández-Muñoz; Carlos A. Mancina

    2011-01-01

    Para determinar los hábitos tróficos de la lechuza, Tyto alba, se analizaron 1232 egagrópilas recolectadas entre 1994 y 2001 en 24 localidades de la región central de Cuba. Se encontraron 3943 presas; los roedores exóticos (Mus musculus y Rattus spp.) fueron las presas dominantes y representaron 80% del total. Otros tipos de presas fueron de menor frecuencia; por ejemplo, insectos (6.1%), murciélagos (5%), anfibios (4.8%), aves (3.6%) y reptiles (0.2%). Se agruparon las localidades de recolec...

  12. 花果山墨旱莲多糖的提取及体外抗氧化活性比较%Extraction of Polysaccharides from Eclipata Alba Grown in Huaguo Mountain and Comparison of Antioxidant Activity in vitro with Total Flavonoids from Eclipata Alba

    Institute of Scientific and Technical Information of China (English)

    许瑞波; 王新新; 唐秋萍; 胡喜兰; 詹永成

    2011-01-01

    在单因素试验的基础上,通过正交试验优化从连云港花果山墨旱莲中提取多糖的工艺条件,并且对墨旱莲多糖(polysaccharides of Eclipata Alba,PEA)与墨旱莲黄酮类化合物(flavonoids of Eclipata Alba,FEA)的抗氧化活性进行比较。结果表明:PEA的最适宜提取工艺条件为料液比1:15、提取温度90℃、提取时间1h、提取3次;用Sevag法去除PEA中蛋白质、核酸等杂质,并用紫外光谱、红外光谱对其进行表征;最后,利用Fenton反应和邻苯三酚自氧化反应比较PEA、FEA对羟自由基(.OH)和超氧阴离子自由基(O-2.)的清除能力,结果表明PEA、FE A对两种自由基都具有良好的清除能力,而且对.O H的清除能力大于对O-2.的清除能力。当质量浓度大于0.085mg/mL时,FEA的抗氧化活性强于PEA。%Using one-factor-at-a-time experiments followed by orthogonal array design,the process conditions of polysaccharide extraction from Eclipata Alba grown in Huaguo Mountain were optimized in this study.Also,a comparison of antioxidant activity was carried out between polysaccharides(PEA) and flavonoids(FEA) from Eclipata Alba.The results showed that the optimum conditions for polysaccharide extraction were material-to-liquid ratio of 1:15(g/mL),extraction time of 1 h,extraction temperature of 90 ℃ and extraction number of 3.After the removal of impurities such as proteins,nucleic acids,etc,the extracted polysaccharides were characterized using ultraviolet spectroscopy and infrared spectroscopy.Both PEA and FEA had a powerful ability to scavenge hydroxyl and superoxide anion radicals and could scavenge the former more powerfully.At the same concentrations exceeding 0.085 mg/mL,FEA indicated stronger antioxidant activity than PEA.

  13. ÉXITO DE ANIDACIÓN DE LA GARZA REAL Egretta alba (Aves, Ardeidae) EN EL DEPARTAMENTO DE CÓRDOBA, COLOMBIA Nesting Success of the Great-White Heron (Egretta alba) in the Department of Córdoba, Colombia

    OpenAIRE

    Troncoso Francisco; Rodríguez-Barrios Javier

    2006-01-01

    El éxito de anidación de la garza real (Egretta alba) durante un período reproductivo, se determinó en una camaronera en el departamento de Córdoba (Noroeste de Colombia) entre los meses de julio y noviembre de 2001. Examinamos la influencia de la disposición de los nidos hacia el interior de la colonia y su localización vertical en los árboles, sobre el éxito de anidación de esta garza, encontrando que los dos factores están significativamente relacionados con el porcentaje de éxito de anida...

  14. EL DERECHO COMO COMPLEJIDAD DE SABERES DIVERSOS

    Directory of Open Access Journals (Sweden)

    María Isolina Dabove

    2011-08-01

    Full Text Available El motivo principal de este trabajo consiste en observar la estrecha vinculación que existe entre los distintos grados del saber y la configuración misma del mundo jurídico como objeto cultural. Así pues, desde esta perspectiva, se advierte que el Derecho puede ser considerado un fenómeno complejo, en gran medida, debido a los distintos tipos de conocimiento que intervienen en su construcción. El saber, en este marco, será entendido como aquel conjunto de información referida a hechos o abstracciones, que se expresan en proposiciones lógicas y responden a algún criterio de verdad admitido como válido para el caso. Sin embargo, es preciso señalar también que esta definición genérica del conocimiento debe completarse con los conceptos propios de los distintos grados (o clases de saberes que fueron consolidándose históricamente, tales como la filosofía, la ciencia, la tecnología, el saber empírico o popular y el religioso[1]. Hasta donde entendemos, sobre cada uno de estos términos se ha ido desplegando una rica trama teórica. No obstante, en este artículo sólo expondré una breve caracterización de los mismos, con el propósito de señalar de manera aproximativa, por qué razón el Derecho puede ser comprendido como una complejidad, resultante de la interacción diversa de todos los tipos de conocimiento mencionados y no sólo, como el producto de la ciencia o la filosofía, en particular. Veamos, entonces en primer lugar, cuáles son los rasgos más destacados de los modelos gnoseológicos vigentes; para poder observar, en segundo término, los modos por los cuales todos ellos posibilitan la construcción del Derecho en la actualidad.

  15. Como usado como marcador del discurso en el lenguaje juvenil de Madrid

    OpenAIRE

    Holmvik, Lise

    2011-01-01

    El objetivo del presente estudio ha sido analizar y describir las varias funciones pragmáticas que muestra como en las conversaciones entre los jóvenes madrileños en el corpus COLAm. Asimismo fue analizada la distribución de como según género y clase social. El uso de como tiene una frecuencia de 0,98 pmp (por mil palabras) en el lenguaje juvenil madrileño, el número de hallazgos de como con función de marcador del discurso siendo 499 de un total de apróximadamente 500.000 palabras en el corp...

  16. MEMORIA VISUAL COMO PARTE DEL PROCESO LECTOR

    OpenAIRE

    Gamero-Muñiz, Antonia

    2013-01-01

    Este trabajo tiene como objetivo indagar la relación entre los movimientos sacádicos, velocidad y comprensión lectora y la memoria visual en alumnos de 2ºESO, con el propósito de contribuir a la labor docente en los apoyos del aprendizaje de una correcta lectura y tomando como fundamentación teórica la importancia de la memoria visual en el proceso lector. Se ha seleccionado una muestra de 24 niños y 21 niñas con edades comprendidas entre 13 y 15 años. Se evaluaron los movimientos sacádico...

  17. La fenomenología como atavismo

    Directory of Open Access Journals (Sweden)

    Galán, Iván

    2009-04-01

    Full Text Available This paper deals with phenomenology as a result of phenomenological freedom in its possibility of understanding a phenomenon as wild phenomenon. From this perspective, we are enabled to transcend established symbolic systems and to pose the question on the existence of a sense which is immature, not-saturated and imperfect without exception.El artículo pretende mostrar la vigencia de la fenomenología como expresión de la libertad fenomenológica, como posibilidad siempre abierta de acceder al fenómeno en cuanto fenómeno puro, registro arquitectónico en el que, saltando por sobre los sistemas simbólicos instituidos, nos es permitido plantear en toda su radicalidad la pregunta por la existencia de un sentido siempre prematuro, no saturado y jamás clausurable.

  18. The antioxidant status and oxidative stability of muscle from lambs receiving oral administration of Artemisia herba alba and Rosmarinus officinalis essential oils.

    Science.gov (United States)

    Aouadi, Dorra; Luciano, Giuseppe; Vasta, Valentina; Nasri, Saida; Brogna, Daniela M R; Abidi, Sourour; Priolo, Alessandro; Salem, Hichem Ben

    2014-06-01

    The effect of the dietary supplementation to lambs of essential oils (EOs) from rosemary (Rosmarinus officinalis) and artemisia (Artemisia herba alba) on the antioxidant status of muscle and on meat oxidative stability was studied. Eighteen Barbarine lambs were divided into 3 groups and for 95days received oat hay and concentrates. One group (C) was not supplemented, while the other two groups received 400mg/kg of EOs from rosemary (R400) or artemisia (A400). Both EOs possessed antioxidant properties and their oral administration improved the reducing and radical scavenging capacity of the muscle compared to the C treatment (P<0.01). Nevertheless, supplementing EOs did not exert protection against lipid oxidation and did not affect the colour stability in meat over 7days of aerobic storage. PMID:24583334

  19. Identification of metabolites of Radix Paeoniae Alba extract in rat bile, plasma and urine by ultra-performance liquid chromatography-quadrupole time-of-flight mass spectrometry

    Institute of Scientific and Technical Information of China (English)

    Zheng-Wei Chen; Ling Tong; Shu-Ming Li; Dong-Xiang Li; Ying Zhang; Shui-Ping Zhou; Yong-Hong Zhu; He Sun

    2014-01-01

    Ultra-performance liquid chromatography coupled with quadrupole time-of-flight tandem mass spectrometry (UPLC-Q-TOF/MS) was developed to identify the absorbed parent components and metabolites in rat bile, plasma and urine after oral administration of Radix Paeoniae Alba extract (RPAE). A total of 65 compounds were detected in rat bile, plasma and urine samples, including 11 parent compounds and 54 metabolites. The results indicated that glucuronidation, hydroxylation and methylation were the major metabolic pathways of the components of RPAE. Furthermore, the results of this work demonstrated that UPLC-Q-TOF/MS combined with MetaboLynx™ software and mass defect filtering (MDF) could provide unique high throughput capabilities for drug metabolism study, with excellent MS mass accuracy and enhanced MSE data acquisition. With the MSE technique, both precursor and fragment mass spectra can be simultaneously acquired by alternating between high and low collision energy during a single chromatographic run.

  20. Morfología, anatomía, ontogenia y composición química de metabolitos secundarios en inflorescencias de Lippia alba (Verbenaceae

    Directory of Open Access Journals (Sweden)

    María Isabel Parra-Garcés

    2010-12-01

    Full Text Available La especie Lippia alba (Verbenaceae llama la atención de los investigadores por su amplia distribución en todo el mundo y sus diversas propiedades. Se establecieron tres etapas durante el desarrollo de sus inflorescencias, fueron recolectadas en Bucaramanga, Colombia para analizar los cambios morfoanatómicos. Para ello, las muestras se trataron mediante la técnica safraninafastgreen y se observaron utilizando microscopio óptico convencional. Se realizó el aislamiento de los metabolitos secundarios volátiles usando la técnica de microextracción en fase sólida en el modo headspace (HS-SPME y su posterior análisis de componentes, mediante cromatografía de gases acoplada a espectrometría de masas (GC-MS. En la Etapa I se observó una masa de células meristemáticas en el ápice vegetativo. En la Etapa II la acción de procesos morfogenéticos dan paso a la formación de los verticilos florales del perianto. En la Etapa III se establecen todos los verticilos florales. Los principales metabolitos secundarios constituyen el 78% de la cantidad relativa total. Ellos son el biciclosesquifelandreno, la carvona, el limoneno y el trans-β-farneseno. Los metabolitos β-copaeno, γ-amorfeno y cis-β-guaieno, no estαn registrados en la bibliografνa revisada. Estos compuestos activos pueden variar de acuerdo con el estado de desarrollo de la planta, la parte empleada para la extracciσn y el mιtodo implementado para ello.Morphology, anatomy, ontogeny and chemical composition of inflorescences volatile secondary metabolites of Lippia alba (Verbenaceae at three stages of development. There is an increased interest to know and scientifically validate traditional knowledge of medicinal plants. Lippia alba belongs to Verbenaceae family and has been of interest, not only because of its worldwide extensive distribution, but also for its variable use as antiviral, bactericide, citostatic, analgesic and sedative. To study this, the morphology and

  1. POTENTIAL FOR GREAT EGRETS (ARDEA ALBA) TO TRANSMIT A VIRULENT STRAIN OF AEROMONAS HYDROPHILA AMONG CHANNEL CATFISH (ICTALURUS PUNCTATUS) CULTURE PONDS.

    Science.gov (United States)

    Jubirt, Madison M; Hanson, Larry A; Hanson-Dorr, Katie C; Ford, Lorelei; Lemmons, Scott; Fioranelli, Paul; Cunningham, Fred L

    2015-07-01

    Aeromonas hydrophila is a gram-negative, rod-shaped, facultative, anaerobic bacterium that is ubiquitous in freshwater and slightly brackish aquatic environments and infects fish, humans, reptiles, and birds. Recent severe outbreaks of disease in commercial channel catfish (Ictalurus punctatus) aquaculture ponds have been associated with a highly virulent A. hydrophila strain (VAH), which is genetically distinct from less-virulent strains. The epidemiology of this disease has not been determined. Given that A. hydrophila infects birds, we hypothesized that fish-eating birds may serve as a reservoir for VAH and spread the pathogen by flying to uninfected ponds. Great Egrets (Ardea alba) were used in this transmission model because these wading birds frequently prey on farmed catfish. Great Egrets that were fed VAH-infected catfish shed VAH in feces demonstrating their potential to spread VAH. PMID:25984772

  2. Reconstruction of crown length of Norway spruce (Picea abies (L.) Karst.) and Silver fir (Abies alba Mill.) - technique, establishment of sample methods and application in forest growth analysis

    OpenAIRE

    Spathelf, Peter

    2003-01-01

    Évolution en hauteur des houppiers d'épicéa (Picea abies (L.) Karst.) et de sapin pectiné (Abies alba Mill.) - technique, mise en œuvre de méthodes d'échantillonnage, application à l'analyse de la croissance des forêts. On a utilisé une technique permettant de dater la mortalité des branches pour estimer la régression par le bas des houppiers de l'épicéa et du sapin pectiné, dans des placettes temporaires installées dans des forêts mélangées et inéquiennes de la Forêt Noire (Allemagne). Les r...

  3. In vitro Antioxidant, Lipoxygenase and Xanthine Oxidase Inhibitory Activities of Fractions from Cienfuegosia digitata Cav., Sida alba L. and Sida acuta Burn f. (Malvaceae

    Directory of Open Access Journals (Sweden)

    J. Millogo-Rasolodimby

    2010-01-01

    Full Text Available In this study polyphenol content, antioxidant activity, lipoxygenase (LOX and Xanthine Oxidase (XO inhibitory effects of n-hexane, dichloromethane, ethyl acetate and n-butanol fractions of aqueous acetone extracts from S. alba L., S. acuta Burn f. and Cienfuegosia digitata Cav. were investigated. The total phenolics, flavonoids, flavonols and total tannins were determined by spectrophotometric methods using Folin-ciocalteu, AlCl3 reagents and tannic acid, respectively. The antioxidant potential was evaluated using three methods: inhibition of free radical 2,2-diphenyl-1-picrylhydramzyl (DPPH, ABTS radical cation decolorization assay and Iron (III to iron (II reduction activity (FRAP. For enzymatic activity, lipoxygenase and xanthine oxidase inhibitory activities were used. This study shows a relationship between polyphenol contents, antioxidant and enzymatic activities. Present results showed that ethyl acetate and dichloromethane fractions elicit the highest polyphenol content, antioxidant and enzymatic activities.

  4. El rock como conformador de identidades juveniles

    Directory of Open Access Journals (Sweden)

    Adrián de Garay

    1996-04-01

    Full Text Available El autor analiza la relación entre el rock y las identidades juveniles, a partir del abordaje de cinco “estilos” que se pueden identificar como constitutivos de éstas identidades. Ellos son: la jerga, la estética, las producciones culturales, los no-lugares y el territorio. Finaliza el artículo señalando algunos hitos importantes de la culturarockera en la ciudad de México.

  5. Barrios cerrados como estrategia de desarrollo municipal

    Directory of Open Access Journals (Sweden)

    Nora Libertun de Duren

    2010-07-01

    Full Text Available Los barrios cerrados han sido generalmente estudiados desde la perspectiva de sus residentes, preferencias, estatus económico, y ambiciones sociales. Aun más, estos proyectos han sido asociados con el debilitamiento del estado y un desarrollo urbano gobernado por las necesidades del mercado. Sin embargo, queda por responder cual ha sido el papel de las instituciones públicas en la proliferación de barrios cerrados. Este artículo analiza el caso de Buenos Aires, donde las municipalidades suburbanas más pobres han visto a las urbanizaciones cerradas como una estrategia de desarrollo local. Aprovechando la descentralización de la reglamentación sobre los usos del suelo del nivel provincial al municipal, las municipalidades con un alto porcentaje de hogares pobres han facilitado el desarrollo de urbanizaciones cerradas como estrategia para aumentar el empleo local y la inversión privada en la zona. Como consecuencia de esta política, las urbanizaciones cerradas se han concentrado en las municipalidades más pobres del cono urbano bonaerense. Así, se ha incrementando la polarización social dentro de cada municipalidad, lo cual llama a revisar el efecto de las reformas de descentralización en la formación de una sociedad mas inclusiva y participativa.

  6. Antiproliferative Effects of New Dimeric Ellagitannin from Cornus alba in Prostate Cancer Cells Including Apoptosis-Related S-Phase Arrest.

    Science.gov (United States)

    Park, Kwan Hee; Yin, Jun; Yoon, Ki Hoon; Hwang, Yoon Jeong; Lee, Min Won

    2016-01-01

    Activity-guided isolation of 80% acetone extract of Cornus alba, which is traditionally used as an anti-inflammatory, hemostatic and diuretic in Korea, yielded one novel compound, tentatively designated cornusiin H (13), together with 12 known compounds. The known compounds included four flavonoids (catechin (1), quercetin-3-O-β-D-glucuronide (2), quercetin-3-O-β-D-glucopyranoside (3), kaempferol-3-O-β-D-glucopyranoside (4)) and eight hydrolysable tannins (gallic acid (5), 2,6-di-O-galloyl-hamamelofuranoside (6), 2-galloyl-4-caffeoyl-L-threonic acid (7) 2,3-di-O-galloyl-4-caffeoyl-L-threonic acid (8), 1,2,3,4,6-penta-O-galloyl-β-D-glucopyranoside (9), cornusiin B (10), cornusiin A (11) and camptothin B (12)). All compounds exhibited potent 1,1-diphenyl-2-picrylhydrazyl (DPPH)-free radical scavenging activity. Especially, the radical scavenging activities of 6 and 9-13 were higher than that of vitamin C. Compounds 9, 11, 12 and 13 inhibited the production of nitric oxide (NO) in lipopolysaccharide-stimulated RAW264.7 cells to the same degree as N(G)-Monomethyl-L-arginine (L-NMMA). When the antiproliferative effects of the isolated compounds were assessed in prostate cancer cells, the dimeric ellagitannins (11-13) selectively inhibited LNCaP hormone-dependent prostate cancer cells. Flow cytometry analysis indicated that the dimeric ellagitannins induced apoptosis and S-phase arrest. These results suggest that dimeric ellagitannins from Cornus alba can be developed as functional materials or herbal medicines for prostate tumors such as benign prostate hyperplasia and early-stage prostate cancer. PMID:26805810

  7. Antiproliferative Effects of New Dimeric Ellagitannin from Cornus alba in Prostate Cancer Cells Including Apoptosis-Related S-Phase Arrest

    Directory of Open Access Journals (Sweden)

    Kwan Hee Park

    2016-01-01

    Full Text Available Activity-guided isolation of 80% acetone extract of Cornus alba, which is traditionally used as an anti-inflammatory, hemostatic and diuretic in Korea, yielded one novel compound, tentatively designated cornusiin H (13, together with 12 known compounds. The known compounds included four flavonoids (catechin (1, quercetin-3-O-β-d-glucuronide (2, quercetin-3-O-β-d-glucopyranoside (3, kaempferol-3-O-β-d-glucopyranoside (4 and eight hydrolysable tannins (gallic acid (5, 2,6-di-O-galloyl-hamamelofuranoside (6, 2-galloyl-4-caffeoyl-l-threonic acid (7 2,3-di-O-galloyl-4-caffeoyl-l-threonic acid (8, 1,2,3,4,6-penta-O-galloyl-β-d-glucopyranoside (9, cornusiin B (10, cornusiin A (11 and camptothin B (12. All compounds exhibited potent 1,1-diphenyl-2-picrylhydrazyl (DPPH-free radical scavenging activity. Especially, the radical scavenging activities of 6 and 9–13 were higher than that of vitamin C. Compounds 9, 11, 12 and 13 inhibited the production of nitric oxide (NO in lipopolysaccharide-stimulated RAW264.7 cells to the same degree as NG-Monomethyl-l-arginine (l-NMMA. When the antiproliferative effects of the isolated compounds were assessed in prostate cancer cells, the dimeric ellagitannins (11–13 selectively inhibited LNCaP hormone-dependent prostate cancer cells. Flow cytometry analysis indicated that the dimeric ellagitannins induced apoptosis and S-phase arrest. These results suggest that dimeric ellagitannins from Cornus alba can be developed as functional materials or herbal medicines for prostate tumors such as benign prostate hyperplasia and early-stage prostate cancer.

  8. Evidence of divergent selection for drought and cold tolerance at landscape and local scales in Abies alba Mill. in the French Mediterranean Alps.

    Science.gov (United States)

    Roschanski, Anna M; Csilléry, Katalin; Liepelt, Sascha; Oddou-Muratorio, Sylvie; Ziegenhagen, Birgit; Huard, Frédéric; Ullrich, Kristian K; Postolache, Dragos; Vendramin, Giovanni G; Fady, Bruno

    2016-02-01

    Understanding local adaptation in forest trees is currently a key research and societal priority. Geographically and ecologically marginal populations provide ideal case studies, because environmental stress along with reduced gene flow can facilitate the establishment of locally adapted populations. We sampled European silver fir (Abies alba Mill.) trees in the French Mediterranean Alps, along the margin of its distribution range, from pairs of high- and low-elevation plots on four different mountains situated along a 170-km east-west transect. The analysis of 267 SNP loci from 175 candidate genes suggested a neutral pattern of east-west isolation by distance among mountain sites. F(ST) outlier tests revealed 16 SNPs that showed patterns of divergent selection. Plot climate was characterized using both in situ measurements and gridded data that revealed marked differences between and within mountains with different trends depending on the season. Association between allelic frequencies and bioclimatic variables revealed eight genes that contained candidate SNPs, of which two were also detected using F(ST) outlier methods. All SNPs were associated with winter drought, and one of them showed strong evidence of selection with respect to elevation. Q(ST)-F(ST) tests for fitness-related traits measured in a common garden suggested adaptive divergence for the date of bud flush and for growth rate. Overall, our results suggest a complex adaptive picture for A. alba in the southern French Alps where, during the east-to-west Holocene recolonization, locally advantageous genetic variants established at both the landscape and local scales. PMID:26676992

  9. Hércules y las yeguas de Diomedes, un tapiz bruselés del siglo XVI en la Colección Casa de Alba

    Directory of Open Access Journals (Sweden)

    Redín Michaus, Gonzalo

    2015-12-01

    Full Text Available This article presents the tapestry Hercules and the Mares of Diomedes in the Alba collection (Dueñas Palace, Seville. It forms part of a Hercules series along with others in the Royal Museum of Brussels and in a private collection. They have been attributed to an anonymous artist from Brussels and dated circa 1570. Here they are linked to an anonymous Flemish artist familiar with Peter Coecke van Aelst’s series of The Life of Saint Paul, and it is suggested that Jan Tons, specialized in animal paintings, may have collaborated on these works. In addition the author studies the motifs represented in the borders of the tapestries, copied from prints by Peter Brueghel the Elder and from the tapestry Saint Martin Leaving the City based on a composition by Bosch. This analysis permits new conclusions concerning the dating of these tapestries.El texto presenta un tapiz de la Colección Casa de Alba (Palacio de las Dueñas, Sevilla que figura Hércules y las yeguas de Diomedes. La pieza forma parte de una serie con ejemplares conservados en el Museo Real de Bruselas y en colección privada atribuida a un anónimo licero y cartonista bruselés de hacia 1570. Su concepción se relaciona aquí con un anónimo autor flamenco conocedor de los tapices de la Vida de San Pablo de Peter Coecke van Aelst. El texto aborda la posible participación del animalista Jan Tons en la serie y estudia la presencia en sus cenefas de motivos copiados de estampas de Peter Brueghel el Viejo y del tapiz San Martín saliendo de la ciudad según una composición de El Bosco, que permite hacer alguna precisión respecto a su datación.

  10. Cromatografia em camada fina de extratos de três quimiotipos de Lippia alba (Mill N.E.Br. (erva-cidreira

    Directory of Open Access Journals (Sweden)

    L.S. Julião

    2003-01-01

    Full Text Available O presente trabalho apresenta os cromatogramas em camada fina dos óleos essenciais, do extrato etanólico e do extrato diclorometano de folhas de três quimiotipos de Lippia alba. Os quimiotipos foram denominados I, II e III para as diferenças no constituinte majoritário dos seus óleos essenciais: citral, carvona e linalol, respectivamente. O óleo e os extratos foram comparados com padrões de citral, carvona e linalol. Etanol e diclorometano podem ser usados para extração desde que ambos os extratos tenham perfis cromatográficos semelhantes. Não houve nenhuma diferença entre os extratos de folhas frescas e secas. Os resultados mostram uma rápida e eficiente identificação dos três quimiotipos através da cromatografia de camada fina.The present work shows the thin layer chromatography of the essential oils, the ethanolic extract and the dicloromethane extract obtained from leaves of three chemotypes of Lippia alba. The chemotypes were denominated chemotype I, II and III for the differences in the majoritary compound of their essential oils: citral, carvone and linalol, respectivelly. The oil and the extracts were compared with standards of citral, carvone and linalool. Ethanol and dicloromethane can be used for extraction since both extracts have similar cromathografic profiles. There was no diference between extracts of fresh and dried leaves. The results show a fast and eficcient identification of the three chemotypes by thin layer cromatoghraphy.

  11. Anxiolytic effects of repeated treatment with an essential oil from Lippia alba and (R)-(-)-carvone in the elevated T-maze

    International Nuclear Information System (INIS)

    Lippia alba (Mill.) N.E. Brown (Verbenaceae) is widely used in different regions of Central and South America as a tranquilizer. The plant's anxiolytic properties, however, merit investigation. The present study evaluated the effects of repeated daily (14 days) intraperitoneal (ip) treatment with an essential oil (EO) from a chemotype of L. alba (LA, chemotype II, 12.5 and 25 mg/kg; N = 6-8) and (R)-(-)-carvone (25 mg/kg; N = 8-12), the main constituent of this chemotype, on male Wistar rats (weighing 250 g at the beginning of the experiments) submitted to the elevated T-maze (ETM). The ETM allows the measurement of two defensive responses: inhibitory avoidance and one-way escape. In terms of psychopathology, these responses have been related to generalized anxiety and panic disorder, respectively. Treatment with the EO impaired ETM avoidance latencies, without altering escape, in a way similar to the reference drug diazepam (P < 0.05) (avoidance 2: control = 84.6 ± 35.2; EO 12.5 mg/kg = 11.8 ± 3.8; EO 25 mg/kg = 14.6 ± 2.7; diazepam = 7 ± 2.1). (R)-(-)-carvone also significantly altered this same response (P < 0.05; avoidance 1: control = 91.9 ± 31.5; carvone = 11.6 ± 1.8; diazepam = 8.1 ± 3.3). These results were not due to motor changes since no significant effects were detected in an open field. These observations suggest that LA exerts anxiolytic-like effects on a specific subset of defensive behaviors that have been implicated in generalized anxiety disorder, and suggest that carvone is one of the constituents of LA responsible for its action as a tranquilizer

  12. Anxiolytic effects of repeated treatment with an essential oil from Lippia alba and (R)-(-)-carvone in the elevated T-maze

    Energy Technology Data Exchange (ETDEWEB)

    Hatano, V.Y.; Torricelli, A.S. [Departamento de Biociências, Universidade Federal de São Paulo, Santos, SP (Brazil); Giassi, A.C.C. [Cellular and Molecular Medicine, University of Ottawa, Ottawa (Canada); Coslope, L.A. [Parque Nacional da Chapada Diamantina, Chapada Diamantina, BA (Brazil); Viana, M.B. [Departamento de Biociências, Universidade Federal de São Paulo, Santos, SP (Brazil)

    2012-02-27

    Lippia alba (Mill.) N.E. Brown (Verbenaceae) is widely used in different regions of Central and South America as a tranquilizer. The plant's anxiolytic properties, however, merit investigation. The present study evaluated the effects of repeated daily (14 days) intraperitoneal (ip) treatment with an essential oil (EO) from a chemotype of L. alba (LA, chemotype II, 12.5 and 25 mg/kg; N = 6-8) and (R)-(-)-carvone (25 mg/kg; N = 8-12), the main constituent of this chemotype, on male Wistar rats (weighing 250 g at the beginning of the experiments) submitted to the elevated T-maze (ETM). The ETM allows the measurement of two defensive responses: inhibitory avoidance and one-way escape. In terms of psychopathology, these responses have been related to generalized anxiety and panic disorder, respectively. Treatment with the EO impaired ETM avoidance latencies, without altering escape, in a way similar to the reference drug diazepam (P < 0.05) (avoidance 2: control = 84.6 ± 35.2; EO 12.5 mg/kg = 11.8 ± 3.8; EO 25 mg/kg = 14.6 ± 2.7; diazepam = 7 ± 2.1). (R)-(-)-carvone also significantly altered this same response (P < 0.05; avoidance 1: control = 91.9 ± 31.5; carvone = 11.6 ± 1.8; diazepam = 8.1 ± 3.3). These results were not due to motor changes since no significant effects were detected in an open field. These observations suggest that LA exerts anxiolytic-like effects on a specific subset of defensive behaviors that have been implicated in generalized anxiety disorder, and suggest that carvone is one of the constituents of LA responsible for its action as a tranquilizer.

  13. Campus extens como sistema universitario semipresencial

    Directory of Open Access Journals (Sweden)

    Bárbara De Benito

    2004-01-01

    Full Text Available El proyecto Campus Extens comenzó en 1997 con la idea de extender el campus universitario fuera del recinto tradicional. Aprovechando las nuevas tecnologías para llegar a ciudadanos de las islas baleares que de otra forma no tendrían acceso a una formación superior; mejorar la competencia profesional, a la vez que crea una red de infraestructuras y profesionales que van a ayudar a nuestra Universidad a prepararse para el futuro. El Campus Extens: es un modelo integrado ya que utiliza sistemas con los que los alumnos pueden trabajar dentro y fuera del Campus, utiliza las tecnologías de la información y se apoya fuertemente en las tecnologías interactivas como la videoconferencia, es un modelo educativo innovador, en cuanto que todos los profesores están involucrados en la mejora del proyecto, desde la óptica pedagógica cabe señalar tres aspectos: se trabaja con materiales multimedia; con los profesores propios de la Universidad de las Islas Baleares, los cuales son responsables tanto del contenido como de la docencia; y el ofrecer a éstos el apoyo técnico-pedagógico que necesitan para actuar dentro de este proyecto, como dispositivo metodológico, se trabaja con un sistema síncrono y asíncrono. Es asíncrono porque está apoyado en el aprendizaje autónomo basado en materiales impresos, en CD ROM, en video y en la red, y síncrono porque se apoya en la presencia continuada basada en la videoconferencia, en herramientas de comunicación y en actividades presenciales.

  14. La indiferencia como instrumento de poder

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    Sergio Carlos Staude

    2014-10-01

    Full Text Available La indiferencia como respuestaante las situaciones de horror queprovoca la guerra llega a adquirirdiferentes funciones. Puede ser unindicador del resguardo necesariopara tramitar lo traumático de losacontecimientos, también un modode desmentir la responsabilidad deestos o bien ser un instrumentosiniestro de poder destinado agarantizar la eficacia de quienesejercen la violencia, neutralizar lasrespuestas del medio social y marginarlas reacciones posibles de lasvíctimas. Se destacan los recursosque aportan el psicoanálisis, lacreación ficcional del arte y, en particular,los esfuerzos de legitimaciónde la justicia para paliar los efectosiatrogénicos de la indiferencia.

  15. La publicidad como instrumento de aprendizaje escolar

    OpenAIRE

    Pallarés Piquer, Marc

    2013-01-01

    Tradicionalmente los contenidos educativos han sido un resumen de los saberes que representan las formas de hacer de la cultura, el pensamiento y las creencias de la humanidad. Así, las diferentes disciplinas se reflejaban en unos contenidos educativos organizados en torno a unas materias escolares “encerradas” bajo la llave de los libros de texto. En este artículo se alude a la conveniencia del uso de la publicidad como herramienta escolar. Partiendo del alto índice de consumo de mensajes pu...

  16. CAPITAL SOCIAL COMO FATOR DE DESENVOLVIMENTO LOCAL

    OpenAIRE

    Mendonca, Kamila Vieira; Pinheiro, Jose Cesar

    2008-01-01

    O presente estudo verificou e avaliou o grau de acumulação de capital social como fator de desenvolvimento local, do assentamento Che Guevara, localizado no município de Ocara, no Estado do Ceará. O índice de capital social (ICS) foi calculado com base nas respostas de um questionário elaborado com variáveis mensuráveis e que refletem o estoque de capital social. A comunidade dispõe de um grau mediano de capital social.-------------This study verified and evaluated the degree of accumulation ...

  17. El capital intelectual como activo organizacional

    OpenAIRE

    Freddy Marín González

    2001-01-01

    El artículo que se presenta a continuación es resultado de un proceso continuo de indagación acerca de la gestión de capital intelectual, específicamente, en cuanto a su producción, transferencia, y comercialización, como principal activo, en cualquier organización innovadora. Se logró aproximarse a la construcción de ciertas explicaciones de orden teórico - conceptual, que a través de un procedimiento endógeno de análisis, condujo a buscar una amplia y cabal compre...

  18. como proyecto lingüístico

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    Ana María Rivas Rivas

    2005-01-01

    Full Text Available Este artículo tiene como objetivo analizar las estructuras discursivas, cognitivas y de representación de algunos de los sectores más desfavorecidos del mercado laboral español y su relación con los modelos interpretativos de la realidad generados y difundidos por el pensamiento economicista neoliberal. Se trata de estudiar los mecanismos por medio de los cuales estos modelos dominantes de la realidad son incorporados por los propios trabajadores y trabajadoras para definir y comprender su situación y para determinar la propia capacidad y posibilidad de modificarla.

  19. Ecosistemas como factores de bienestar y desarrollo.

    OpenAIRE

    MÁRQUEZ, GERMÁN

    2011-01-01

    Los ecosistemas proveen más bienes y servicios a la sociedad de lo que generalmente se reconoce. Un ensayo de clasificación de esos bienes y servicios debe incluir: 1) Satisfacci6n de necesidades básicas, como agua, energía y abastecimiento de alimentos. 2) respaldar los procesos productivos, industriales o agropecuarios, con materias primas, agua y abastecimiento de energía. 3) Asimilación de desechos (sólidos, líquidos o gaseosos) de las actividades humanas, en ríos, inmundicias y atmósfera...

  20. LA PROACTIVIDAD EMPRESARIAL COMO ELEMENTO DE COMPETITIVIDAD.

    OpenAIRE

    Alejandra López- Salazar

    2010-01-01

    El papel del empresario debe basarse en impulsar el cambio y el desarrollo de las organizaciones debiendo contar con las habilidades y características necesarias para lograrlo. Analizar la visión y proactividad empresarial como variables de la cultura empresarial, es de gran importancia para la sobrevivencia y competitividad de la micro, pequeña y mediana empresa. El objetivo de este estudio es analizar el nivel de proactividad y visión que tienen 418 empresarios de la región de Celaya, y det...