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Sample records for sw choba frente

  1. SW21 Summary Report

    Energy Technology Data Exchange (ETDEWEB)

    Juarez, A. [Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

    2016-02-10

    Los Alamos and Lawrence Livermore National Laboratories hosted the tenth annual Strategic Weapons in the 21st Century Conference (SW21) on 21 January 2016 to reinforce the national commitment to leadership and institutional excellence for nuclear deterrence. The event has been successful over the years in drawing together a diverse, high-level group of policy makers and experts from multiple disciplines to engage in informed dialogue on topics related to strategic weapons in national and international security.

  2. Bioensayo General de Letalidad en Artemia Salina, a Las Fracciones del Extracto Etanólico De Psidium Guajava. L y Psidium Guineense. Sw

    Directory of Open Access Journals (Sweden)

    Lizbeth Sánchez

    2005-10-01

    Full Text Available El estudio se centró en la evaluación y verificación de la letalidad de las fracciones acetato de etilo, obtenida de los extractos etanólicos de los frutos en estado de madurez, verde y pintón, utilizando la cáscara y pulpa de las especies guayaba (Psidium guajava L y Choba (Psidium guineense Sw. La valoración se llevó a cabo mediante el bioensayo en Artemia salina, a través del cual, se evidencia el siguiente proceso: determinar la concentración letal 50 (CL50 utilizando el medio artificial a Ph 7-8, burbujear con el fin de saturar de oxígeno la solución, controlar la eclosión de los huevos a 25 °C despuésde 48 horas, preparar la solución madre y las de trabajo a concentraciones de 1500, 1000, 500,100, 10 g/ml, control positivo estricnina a 80, 70, 60, 50 g/ml, blanco solvente etanol a 80 g/ml. El ensayo biológico se realizó siguiendo las metodologías propuestas por Gualdrón, R (1994; Cyted (1995;Martínez, C (1999 y McLaughlin, J (1997. Comprobada la letalidad de las fracciones acetato del extracto etanólico de Psidium guajava. L y Psidium guineense. Sw mostró CL50 de 181.4 y 221.30g/ml respectivamente, los resultados se evaluaron según Gautret (2000.

  3. CONFIGURACION DEL FRENTE RIBEREÑO EN QUILLOTA. CONFORMACION DE UN NUEVO FRENTE PACIFICO PARA EL CONTINENTE

    OpenAIRE

    ARAYA GLADINIER, JEAN CRISTOPHER; ARAYA GLADINIER, JEAN CRISTOPHER

    2012-01-01

    Este trabajo se inscribe en el plan maestro para Quillota, junto con el desarrollo un barrio sustentable en el nuevo borde del río Aconcagua frente a Quillota. Ubicado esta vez al Poniente del actual puente del Boco. Y desarrollándose como frente de renovación urbana Se toma en cuenta como antecedente de proyecto, el desarrollado por Nuestra Escuela en los años 80, en el que se propone un nuevo borde de frente fluvial para Quíllota, y un modo de abordar el cerro Mayaca con edificios hab...

  4. Empresas familiares frente a las crisis

    Directory of Open Access Journals (Sweden)

    María Guadalupe Serna

    2012-01-01

    Full Text Available En este artículo llevo a cabo una reflexión sobre los efectos de las crisis de 1984-1985 y 1994-1995 en un pequeño grupo de empresas familiares localizadas en la ciudad de Aguascalientes. Exploro el tipo de recursos tangibles e intangibles con los que contaban sus propietarios durante esos periodos, los apoyos que tenían a su disposición, así como las distintas formas en que respondieron y se adaptaron a las condiciones económicas prevalecientes. Analizo las distintas acciones adoptadas por los propietarios para hacer frente a las condiciones económicas prevalecientes, así como la forma en que algunas veces la crisis en puerta impulsó o bien obstaculizó el proyecto empresarial. Para ello empleo el concepto de capital social que resulta de gran utilidad para explicar las diversas condiciones en que surgen y se desarrollan las pequeñas empresas familiares, así como sus distintas posibilidades de éxito en condiciones de crisis.

  5. Lenguas naturales frente a lenguajes artificiales

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    Ramón Trujillo Carreño

    2014-03-01

    Full Text Available Hace ya tiempo que hemos entrado en aquello que Antonio Machado (1936:97 llamaba «ola de ñoñez y de americanismo»1: la trivialización generalizada del saber y de la cultura. Y no es que esa trivialización haya significado nunca ignorancia, sino fundamentalmente la sustitución del humanismo por los métodos de las ciencias físico-matemáticas, entre las cuales se halla la Informática. Hoy «todo se hace científico» en el sentido de sustituir los productos de las culturas tradicionales por complejos «modelos formales», en ese afán por reducirlo todo a fórmulas o a razonamientos matemáticos —o imaginariamente matemáticos—. El humanismo, dentro del que se había situado y desarrollado al menos una parte de la Lingüística, se desacredita2 y se ve como palabrería inútil, frente a la «nueva cientificidad» de quienes ignoran el pensamiento clásico y sus productos fundamentales, como la filosofía o el arte.

  6. Frente al Envejecimiento en la Mujer

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    Deisy Krzemien

    2007-01-01

    Full Text Available Este trabajo examina la relación entre estilos de personalidad y estilos y estrategias de afrontamiento frente a situaciones críticas del envejecimiento en adultas mayores. Una muestra de 212 participantes fue entrevistada acerca de eventos críticos experimentados en la vejez y evaluada mediante los cuestionarios MIPS y Brief-COPE. La mayoría de los estilos y estrategias de afrontamiento se asoció con determinados estilos de personalidad, en correspondencia a lo esperado según el modelo bipolar de personalidad de Millon. El afrontamiento activo y el apoyo emocional se asociaron positivamente con extraversión, modificación y comunicatividad, y negativamente con retraimiento, acomodación e introversión. El afrontamiento focalizado en el problema se asoció positivamente con intuición, firmeza y control, y negativamente con sensación, vacilación y sometimiento. El afrontamiento evitativo correlacionó positivamente con preservación y negativamente con apertura. Los estilos de personalidad tienen un rol importante en el uso de estrategias de afrontamiento en el envejecimiento femenino.

  7. Seismic Tomography in Reykjanes , SW Iceland

    NARCIS (Netherlands)

    Jousset, Philippe; Blanck, Hanna; Franke, Steven; Metz, M.; Águstsson, K.; Verdel, Arie; Ryberg, T.; Hersir, Gylfi Páll; Weemstra, C.; Bruhn, D.F.; Flovenz, Olafur G

    2016-01-01

    We present tomographic results obtained around geothermal reservoirs using seismic data recorded both on-land Reykjanes, SW-Iceland and offshore along Reykjanes Ridge. We gathered records from a network of 83 seismic stations (including 21 Ocean Bottom Seismometers) deployed between April 2014 and

  8. A ética de lado a lado: Fontes de notícias e jornalistas frente a frente

    Directory of Open Access Journals (Sweden)

    Francisco José Karam

    2010-12-01

    Full Text Available O artigo confronta a ética das fontes de notícias com a deontologia dos jornalistas. Os protagonistas são colocados frente a frente para apurar as responsabilidades, os conflitos, direitos, equívocos e, inclusive, as promiscuidades. Além do diálogo entre autores, confere-se nos manuais de redação e ética dos principais jornais brasileiros - Folha de S. Paulo, O Estado de S. Paulo, O Globo e Zero Hora - como tratam essa relação.

  9. A Testing Framework for Critical Space SW

    Science.gov (United States)

    Fernandez, Ignacio; Di Cerbo, Antonio; Dehnhardt, Erik; Massimo, Tipaldi; Brünjes, Bernhard

    2015-09-01

    This paper describes a testing framework for critical space SW named Technical Specification Validation Framework (TSVF). It provides a powerful and flexible means and can be used throughout the SW test activities (test case specification & implementation, test execution and test artifacts analysis). In particular, tests can be run in an automated and/or step-by-step mode. The TSVF framework is currently used for the validation of the Satellite Control Software (SCSW), which runs on the Meteosat Third Generation (MTG) satellite on-board computer. The main purpose of the SCSW is to control the spacecraft along with its various subsystems (AOCS, Payload, Electrical Power, Telemetry Tracking & Command, etc.) in a way that guarantees a high degree of flexibility and autonomy. The TSVF framework serves the challenging needs of the SCSW project, where a plan-driven approach has been combined with an agile process in order to produce preliminary SW versions (with a reduced scope of implemented functionality) in order to fulfill the stakeholders needs ([1]). The paper has been organised as follows. Section 2 gives an overview of the TSVF architecture and interfaces versus the test bench along with the technology used for its implementation. Section 3 describes the key elements of the XML based language for the test case implementation. Section 4 highlights all the benefits compared to conventional test environments requiring a manual test script development, whereas section 5 concludes the paper.

  10. Clomipramina frente a fenelzina en el trastorno obsesivo-compulsivo

    OpenAIRE

    Vallejo Ruiloba, Julio; Olivares Gadea, Julia; Marcos, Teodor; Bulbena Vilarrasa, Antonio; Menchón Magriñá, José Manuel

    1994-01-01

    Un estudio clínico doble ciego con clomipramina frente a fenelzina fue llevado a cabo en 30 pacientes con trastorno obsesivo-compulsivo según el DSM-III. El período de estudio fue de 12 semanas, y las dosis máximas (a partir de la 5a semana) fueron 225 mg/día para clomipramina (14 pacientes) y 75 mg/día para fenelzina (12 pacientes); 4 pacientes abandonaron. Los síntomas obsesivos mejoraron significativamente en los dos grupos, pero no fiubo diferencia significativa entre ambos. Los síntomas ...

  11. Rnas inhibidores frente al virus de la inmunodeficiencia humana

    OpenAIRE

    Sánchez Luque, Francisco José

    2013-01-01

    En la presente tesis se describe la generaci??n de peque??as mol??culas de RNA con funci??n inhibidora frente al Virus de la Inmunodeficiencia Humana de Tipo 1 (VIH-1). Este virus es el agente causal del S??ndrome de Inmunodeficiencia Adquirida y perteneciente al g??nero Lentivirus de la familia Retroviridae. El virus presenta una alternancia en cuanto al tipo de material gen??tico en su ciclo de vida, siendo RNA en las part??culas virales y DNA en el provirus (durante la fase de latencia o e...

  12. El impacto del TLC frente al derecho comunitario andino

    Directory of Open Access Journals (Sweden)

    Marcel Tangarife Torres

    2006-01-01

    Full Text Available En esta conferencia analiza el impacto del Tratado de Libre Comercio que se celebrará entre la República de Colombia y los Estados Unidos de Norteamérica frente al Derecho Comunitario Andino, con gran importancia en los temas relacionados con la propiedad intelectual. Adicional a lo anterior se suma un aspecto trascendental y es la supervivencia de la Comunidad Andina de Naciones y en este sentido se cuestiona la coexistencia de las normas comunitarias en relación con las previstas en el Tratado de Libre Comercio. De esta manera, se examina el marco constitucional del Tratado de Libre Comercio y del Acuerdo de Cartagena, para así determinar las características que tienen esta clase de tratados y con ello establecer el nivel jerárquico que le corresponden dentro del ordenamiento jurídico Colombiano. Finalmente se observa la prevalencía de las normas del Acuerdo de Cartagena y el Tratado de Libre Comercio o viceversa, para con ello encontrar soluciones frente a los posibles conflictos de normas que se pueden presentar por la coexistencia de dichas normatividades.

  13. O SENTIMENTO DO PACIENTE FRENTE AO CANCELAMENTO DA CIRURGIA

    Directory of Open Access Journals (Sweden)

    Fernanda Aparecida Silva

    2017-02-01

    Full Text Available O paciente, frente ao cancelamento da cirurgia, pode apresentar sentimentos: tristeza, agressividade, revolta, e perder a confiança da equipe cirúrgica. Objetivo: Identificar o sentimento do paciente internado frente ao cancelamento de sua cirurgia. Método: Pesquisa descritiva e quali-quantitativa. A coleta de dados ocorreu após aprovação do Comitê de Ética sob o n0 45/11, com 20 pacientes internados em um hospital do vale do Paraíba paulista. Resultados: Predominou:80% do sexo masculino, 30% de 51 a 60 anos. Principal causa cancelamento: 35% material, 10% vaga na Unidade de Terapia Intensiva (UTI, e 55% médicos, exames, vaga no centro cirúrgico ou infecção. Os sentimentos foram agrupados em quatro categorias: tristeza; estresse; conformismo e sentimentos variados.Conclusão: O perfil predominante dos pacientes foi de homens, entre 51 a 60 anos. A principal causa do cancelamento foi a falta de material; o sentimento de maior destaque foi a tristeza.

  14. Los 10 frentes de la comunicación corporativa

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    José Carlos Losada Díaz

    2009-11-01

    Full Text Available Es muy complicado que una disciplina tan vinculada a la labor profesional como la comunicación corporativa no sea capaz de encontrar un equilibrio entre su constante renovación impulsada por las cambiantes necesidades de la economía de mercado y un acuerdo de mínimos sobre cuál debe ser el núcleo de trabajo real de esta disciplina. El presente artículo trata de ofrecer los que consideramos que son los diez frentes que deben orientar la labor profesional del gestor de la comunicación corporativa en los próximos años. Palabras clave

  15. Frentes de brisa en el Levante español

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    Olcina Cantos, Jorge

    2004-03-01

    Full Text Available Breeze regimes are main winds circulation during warm period of the year (April-September in the East of the Iberian Peninsula. This analysis offers a typology of sea breeze fronts in Spanish Mediterranean area and considers its close relationship with thermal features in Mediterranean sea all year along. The paper studies meteorological causes connected with this atmospheric phenomenon and emphasizes about pluviometric importance in contact with origin of instable sea breeze fronts in mountain areas near to Mediterranean coast.

    [es] Los regímenes de brisas constituyen la principal circulación de vientos durante el semestre cálido del año (abril-septiembre en el Levante español. El presente estudio establece una tipología de frentes de brisa que se desarrollan en este espacio geográfico ibérico y su estrecha relación con los rasgos térmicos del mar Mediterráneo a lo largo del año. Se analizan las causas atmosféricas asociadas a este fenómeno meteorológico y se enfatiza en la importancia pluviométrica ligada al estallido de frentes de brisa inestables en las áreas montañosas próximas al litoral mediterráneo. [fr] Les circulations de brises constitue le mécanisme principal de vents pendant le semestre chaud de l'année (avril - septembre sur le Levant Espagnol. L'étude présente établit une typologie de fronts de brise qui développent dans cet espace géographique et son la relation étroite avec les caractéristiques thermales de la mer Méditerranée pendant l'année. Là sont analysé les raisons atmosphériques associées à ce phénomène météorologique et il est souligné dans l'importance pluviométrica lié à la formation de fronts instables de brise dans les secteurs montagneux près le littoral méditerranée espagnol.

  16. The Castleisland radon Survey (Sw Ireland)

    Energy Technology Data Exchange (ETDEWEB)

    Organo, C. [Radiological Protection Institute of Ireland, Dublin (Ireland); O' sullivan, F. [London Univ. College, Dept of Geomatic Engineering, London, (United Kingdom)

    2006-07-01

    Full text: In September 2003, following the identification of a house near Castleisland in County Kerry (Sw Ireland) with a seasonally adjusted annual average radon concentration of 49,000 Bq/m{sup 3}, the Radiological Protection of Ireland (R.P.I.I.) undertook to carry out a localised radon survey, the so-called 'Castleisland Radon Survey' (C.R.S.). The aim was to investigate the possibility that similarly extreme radon concentrations could be present in other houses in the surrounding area. A studied area of 400 km{sup 2} was designated around the town of Castleisland, divided in four 10 x 10 km{sup 2} grid squares, and all of the approximately 2,500 householders living in this area were invited to participate. Four hundred and eighteen householders responded to the invitation (17% response rate) but only 383 completed the survey. Fourteen percent of these 383 homes were found to have an annual average radon concentration above the Irish national Reference Level for domestic dwellings of 200 Bq/m{sup 3} while 2% were found to be above 800 Bq/m{sup 3}. An arithmetic mean of 147 Bq/m{sup 3} and a geometric mean of 70 Bq/m{sup 3} were calculated for the four studied grid squares. These can be compared with the respective values of 98 and 56 Bq/m3 calculated for the same area by the Irish National Radon Survey (N.R.S.). Similar trends are observed on a grid square by grid square basis where in one of them in particular, the C.R.S. allowed us to predict that 21% of all houses would have radon concentrations in excess of 200 Bq/m{sup 3}, against 6% predicted by the N.R.S.. This clearly indicates that the extent of the radon problem in the area has been underestimated by the N.R.S.. Two of the four grid squares investigated are currently designated as High Radon Areas (where 10% or more of all houses are predicted to exceed 200 Bq/m{sup 3}) based on the results from the N.R.S.. If one was to use predictions based on the results from the C.R.S., all four grid

  17. Hydrogeology of Pico Frentes Karst system (Iberian range, Spain)

    Energy Technology Data Exchange (ETDEWEB)

    Rosas, P.; Sanz, E.; Menendez-Pidal, I.

    2016-07-01

    The karst system of Pico Frentes has developed within an Upper Cretaceous calcareous series whose welldefined folded geometry determines that its aquifer reserves are held mainly in three hydraulically-connected synclines, with a groundwater capacity of between 5 and 7 hm3 . The recharge to this unconfined peneplain aquifer is autogenous and diffuse. On a large scale, groundwater flow is directed by the base of the synclines, while on a small scale, it flows along groundwater conduits towards the Fuentetoba Spring (210 l/s) and source of the River Mazos (50 l/s), following a highly variable flow regime of low inertia, with other smaller discharges emanating during periods of high water. Analysis of hydrographs of these springs indicates a very variable rate system and little power regulating natural, characteristic of a typical karstic aquifer, with great capacity for renewal and low residence time. Using hydrogram simulations of these upwellings using a mathematical rainfall-runoff model, a detailed quantification of the average water balance was made for a twenty-year time series. This water balance consists of 16,86 hm3 rainfall (100%); natural recharge, 8,35 hm3 (49,53%); EVT 8,50 hm3 (50,41%); pumped groundwater abstractions, 0,01hm3 (0,06%); surface runoff, 0 hm3, groundwater transfers to other aquifer, 0 hm3. (Author)

  18. The validity and reliability of the handheld SW-100 autokeratometer

    Directory of Open Access Journals (Sweden)

    Eghosasere Iyamu

    2015-07-01

    Full Text Available Background: The agreement of new instruments or clinical tests with other instruments or tests defines the possibility of these being used interchangeably. Aim: To investigate the validity and reliability of the SW-100 autokeratometer using a Bausch & Lomb (B&L keratometer as the ‘gold standard’. Methods: Eighty subjects (80 right eyes aged between 21 and 38 years were recruited. For intra-test repeatability, two measurements of the corneal radius of curvature were taken with the SW-100 and B&L keratometers. Forty of the 80 subjects participated in the inter-test repeatability measurement. Results: Corneal radius of curvature was found to be statistically different between the two instruments (p < 0.001, with the SW-100 providing slightly flatter values of 0.11 mm and 0.05 mm for the horizontal and vertical meridians, respectively, than the B&L keratometer. The average corneal curvature was 0.07 mm flatter with the SW-100 autokeratometer than with the B&L device. Agreement between the SW-100 and B&L keratometers’ axes was 45% within ± 5°, 60.3% within ± 10°, 78.8% within ± 15°, 80.3% within ± 20°, and 88.7% within ± 40°. Intertest repeatability was better for the B&L device than the SW-100 and showed no significant difference between the two sessions. Both instruments demonstrated comparable intrasession repeatability. As such, both instruments were comparatively reliable (per coefficients of repeatability. The range of limits of agreement of ± 0.14 mm (horizontal meridian and ± 0.17 mm (vertical meridian between the SW-100 and B&L devices showed good agreement. Conclusion: The results suggest that the SW-100 autokeratometer is a reliable and objective instrument that, however, provides flatter radii of curvature measurements than the B&L keratometer. A compensating factor incorporated into the instrument could reduce the difference between the two instruments and make them more interchangeable.

  19. Geochemistry of Archaean supracrustal belts in SW Greenland

    DEFF Research Database (Denmark)

    Szilas, Kristoffer

    This PhD-thesis investigates the geological formation environment of c. 3200-3000 million-year-old volcanic rocks from SW Greenland, using whole-rock geochemical data in combination with U-Pb, Sm-Nd and Lu-Hf isotope data. The following three supracrustal areas were studied: (1) The Tartoq Group ...

  20. Heliotropium thermophilum (Boraginaceae), a new taxon from SW Anatolia, Turkey

    DEFF Research Database (Denmark)

    Tan, Kit; Celik, Ali; Gemici, Yusuf

    2008-01-01

    Heliotropium thermophilum Kit Tan, A. Çelik & Y. Gemici (Boraginaceae), is described as a species new to science and illustrated. Its diploid chromosome number of 2n = 16 is a first report. It is restricted to the province of Aydin bordering on Denizli in SW Anatolia and is of interest on account...

  1. Palaeoenvironmental reconstruction of Hüsamlar coal seam, SW

    Indian Academy of Sciences (India)

    The Ören and Yatağan Basins in SW Turkey host several Miocene coal deposits currently under exploitation for power generation. The present study aims to provide insight into the palaeoenvironmental conditions, which controlled the formation of the Hüsamlar coal seam located in Ören Basin. The coal seam displays ...

  2. Verbascum lindae (Scrophulariaceae), a new species from SW Anatolia, Turkey

    DEFF Research Database (Denmark)

    Parolly, Gerald; Tan, Kit

    2007-01-01

    Verbascum lindae, a taxonomically isolated limestone chasmophyte from the vilayet of Isparta in SW Anatolia is described as a species new to science and illustrated. Its affinities with other Anatolian Verbascum species, which have either a chasmophytic habit or at least a woody base, are discussed....

  3. Use of Student Experiments for Teaching Embedded Software Development Including HW/SW Co-Design

    Science.gov (United States)

    Mitsui, H.; Kambe, H.; Koizumi, H.

    2009-01-01

    Embedded systems have been applied widely, not only to consumer products and industrial machines, but also to new applications such as ubiquitous or sensor networking. The increasing role of software (SW) in embedded system development has caused a great demand for embedded SW engineers, and university education for embedded SW engineering has…

  4. Shrub expansion in SW Greenland under modest regional warming

    DEFF Research Database (Denmark)

    Jørgensen, Rasmus Halfdan; Meilby, Henrik; Kollmann, Johannes

    2013-01-01

    Shrub expansion has been observed widely in tundra areas across the Arctic. This phenomenon has been partially attributed to increasing temperatures over the past century. However, relationships among shrub expansion, grazing, and human disturbance have been studied little. SW Greenland...... is a subarctic to low-arctic region with a long and complex land-use history and only modest temperature increases over the past 50 years (0.2 °C decade-1), but changes in shrub cover have not previously been studied in this region. We compiled historical photographs of vegetation in SW Greenland (1898......–1974) and repeated the photos in 2010 and 2011. Sixty-four photo pairs were cropped into 133 smaller units and classified by aspect, substrate stability, muskoxen grazing, and human disturbance. The photo material was evaluated by 22 experts with respect to changes in shrub cover, revealing a general increase across...

  5. Reconstrucción estética de la frente en carcinoma basocelular

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    J. De Abullarade

    2014-06-01

    Full Text Available La frente es una de las áreas más difíciles de reconstruir debido a su propia anatomía, la piel es firme, gruesa, y escasamente elástica. Esto ha supuesto un reto para muchos, y a algunos nos ha llevado a tratar de innovar en la reconstrucción de esta zona anatómica. En este artículo, clasificamos imaginariamente las áreas reconstructivas de la frente de acuerdo a las estructuras vecinas y describimos un tipo de reconstrucción para cada zona en la que movilizamos colgajos rectangulares, siguiendo las líneas naturales de la frente.

  6. Características del ambiente marino frente a la costa peruana

    OpenAIRE

    Morón Antonio, Octavio

    2000-01-01

    El ambiente marino frente al Perú es modificado considerablemente por eventos transcendentes de características opuestas: El Niño y La Niña, los mismos que se presentan alternadamente, con diferente intensidad y duración. La temperatura presenta sus máximos y mínimos valores en verano e invierno, respectivamente;ambos E:xtremos dela salinidad se registran en el verano; los nutrientes presentan sus mínimos valores en verano y máximos en el invierno, intensificándose el afloramiento. Frente...

  7. Panorama de las Academias frente al Siglo XXI

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    Zoilo Cuellar Montoya

    1996-12-01

    nombramiento, en ese importante lugar de la salubridad pública, de una persona sin experiencia en esos temas. Las consecuencias de esta decisión no se hicieron esperar y hoy son muy grandes los conflictos existentes en los programas de salud del pueblo colombiano.

    Este hecho, por lo menos en Colombia, marca claramente la posición de los estamentos oficiales y políticos frente al médico y a sus posibilidades como administrador en salud. Más tarde, otro economista, que estuvo casi dos años al mando del Ministerio mencionado, contra viento y marea, engañando con su agilidad verbal a quienes ya al final de su período intentaron intervenir, cohonestado por el silencio cómplice del médico y, porque no decirlo, el de nuestra Academia, logró la puesta en marcha de una nueva ley de seguridad social con una filosofía sana, pero totalmente economicista, y en cuyo desarrollo nunca se tuvo en cuenta al médico: ley que busca el cubrimiento universal en salud del pueblo colombiano, loable sin lugar a dudas, pero impracticable por fallas conceptuales básicas, económicas, operacionales y profesionales (desconocimiento del recurso humano en salud...

  8. Correlatos valorativos de atitudes frente à tatuagem Value correlates of attitudes toward tattoo

    Directory of Open Access Journals (Sweden)

    Valdiney V Gouveia

    2010-12-01

    Full Text Available Este estudo objetivou conhecer em que medida os valores explicam as atitudes frente à tatuagem e estas, por sua vez, predizem a intenção de tatuar-se. Participaram 263 estudantes universitários de João Pessoa, com idade média de 20,7 anos, a maioria homem (54,7% e solteira (91%. Estes responderam a Escala de Atitudes frente à Tatuagem, o Questionário dos Valores Básicos e perguntas demográficas (idade, sexo, religiosidade. Os resultados indicaram atitudes dos participantes mais negativas frente à tatuagem, sobretudo aqueles de ciências exatas e naturais. Comprovou-se a adequação de um modelo triádico, onde os valores predisseram as atitudes frente à tatuagem e, estas, a intenção de tatuar-se. Especificamente, a subfunção normativa promoveu atitudes negativas frente à tatuagem, enquanto a subfunção experimentação favoreceu aquelas mais positivas. Conclui-se que as atitudes frente à tatuagem têm base valorativa, explicando a intenção de tatuar-se. Sugeriram-se pesquisas futuras que contribuam para explicar as atitudes frente à tatuagem.This study investigated the extent to which values explain the attitudes towards tattoos and these, in turn, predict the intention of tattooing. Participants were 263 undergraduate students from João Pessoa (Brazil, with mean age of 20.7 years, mostly men (54.7% and unmarried (91%. They answered the Attitudes toward Tattoo Scale, the Basic Values Survey and demographic questions (age, gender, and religiosity. Results indicated that the participants' attitudes toward tattooing were predominantly negatives, especially among students of natural and exact sciences. The adequacy of a triadic model was proved, where human values predicted attitudes toward tattooing and these, the intention of getting tattooed. Specifically, the value subfunction normative promoted negative attitudes toward tattooing, while the subfunction excitement favored more positive attitudes. In conclusion, attitudes

  9. Características das Frentes Frias Causadoras de Chuvas Intensas no Leste de Santa Catarina

    Directory of Open Access Journals (Sweden)

    Marcelo Seluchi

    Full Text Available Resumo O presente trabalho analisa as características principais das frentes frias causadoras de chuvas intensas no litoral do Estado de Santa Catarina, com a finalidade de melhorar o conhecimento e a previsão desse tipo de situação. Para isso, foi feita uma climatologia sinótica das frentes frias, utilizando reanálises CFSR do NCEP e dados de precipitação do CPTEC/INPE no período 1998-2010, a partir dos quais foram separados 5% das frentes frias mais chuvosas da série. Os resultados mostram que as frentes frias que provocam chuvas mais volumosas ocorrem ao longo de todo o ano, associadas à penetração de cavados frios, intensos e pouco baroclínicos nos níveis médios e altos da atmosfera. A lenta evolução da situação meteorológica permite a intensificação de um cavado na baixa troposfera, que provoca a gradativa intensificação da instabilidade termodinâmica sobre o leste de Santa Catarina, através da advecção de calor e umidade desde a Amazônia. A frente fria que dispara a precipitação apresenta forte inclinação nos baixos níveis e lento deslocamento. Em geral, a situação meteorológica apresenta poucas variações sazonais e pode ser identificada, em média, com pelo menos 48 h de antecedência.

  10. Holocene oceanographic changes in SW Labrador Sea, off Newfoundland

    DEFF Research Database (Denmark)

    Sheldon, Christina; Seidenkrantz, Marit-Solveig; Pearce, Christof

    2016-01-01

    Benthic foraminiferal assemblages supported by selected geochemical data from three marine sediment cores collected in Placentia Bay, SE Newfoundland, are used to construct an ~13,000-year-long record of regional oceanographic changes in the SW Labrador Sea. The area is located in the boundary zo....... The Northern Hemisphere neoglacial cooling around 2.8 cal. kyr BP was characterized off SE Newfoundland by a further stabilization of the current system, dominated by the LC with some continued influx of GS water....

  11. The Robust Software Feedback Model: An Effective Waterfall Model Tailoring for Space SW

    Science.gov (United States)

    Tipaldi, Massimo; Gotz, Christoph; Ferraguto, Massimo; Troiano, Luigi; Bruenjes, Bernhard

    2013-08-01

    The selection of the most suitable software life cycle process is of paramount importance in any space SW project. Despite being the preferred choice, the waterfall model is often exposed to some criticism. As matter of fact, its main assumption of moving to a phase only when the preceding one is completed and perfected (and under the demanding SW schedule constraints) is not easily attainable. In this paper, a tailoring of the software waterfall model (named “Robust Software Feedback Model”) is presented. The proposed methodology sorts out these issues by combining a SW waterfall model with a SW prototyping approach. The former is aligned with the SW main production line and is based on the full ECSS-E-ST-40C life-cycle reviews, whereas the latter is carried out in advance versus the main SW streamline (so as to inject its lessons learnt into the main streamline) and is based on a lightweight approach.

  12. El Frente Popular: Representaciones sobre la ciudadanía en Chile, 1930-1950

    Directory of Open Access Journals (Sweden)

    Bárbara Silva

    2017-05-01

    Full Text Available The Frente Popular: Representations of Citizenship in Chile, 1930-1950This article seeks to characterize the representations of citizenship as promoted by the political actors of the Frente Popular (Popular Front, a centre-left coalition of parties in Chile around 1940. Citizenship was understood as being a combination of discourses and practices that formed a complex balance which enabled the continuance of those representations far into the twentieth century, despite the Frente Popular’s short existence. We identify and define the main characteristics of this citizenship as a voter citizen, a learning citizenry, a fulfilled citizenry, and a consumer citizen. Our premise is that, in contrast to projects of contemporary ‘populist fronts’, these representations were able to materialize in institutional practices that were visible in the public space. This allowed for the consolidation of the political project of the Frente Popular beyond its termination as a coalition in 1941 up to the end of the national leadership of the Partido Radical in 1952.ResumenEl objetivo de este artículo es caracterizar las representaciones de la ciudadanía promovidas por los actores que formaron parte del Frente Popular, una alianza política de centro izquierda en el Chile en torno a 1940. La ciudadanía se comprendió como una suma de discursos y prácticas que formaron un complejo equilibrio que permitió, a pesar de su breve duración, la permanencia de esas representaciones a lo largo del siglo XX. Las principales características que identificamos de esa ciudadanía fueron la definición de un ciudadano elector; una ciudadanía que se educa; una ciudadanía redimida y un ciudadano consumidor. El argumento que se propone es que, a diferencia de otros proyectos ‘frentepopulistas’ contemporáneos, estas representaciones pudieron materializarse en prácticas institucionales visibles en el espacio público. Ello permitió consolidar el proyecto pol

  13. Fethiye-Burdur Fault Zone (SW Turkey): a myth?

    Science.gov (United States)

    Kaymakci, Nuretdin; Langereis, Cornelis; Özkaptan, Murat; Özacar, Arda A.; Gülyüz, Erhan; Uzel, Bora; Sözbilir, Hasan

    2017-04-01

    Fethiye Burdur Fault Zone (FBFZ) is first proposed by Dumont et al. (1979) as a sinistral strike-slip fault zone as the NE continuation of Pliny-Strabo trench in to the Anatolian Block. The fault zone supposed to accommodate at least 100 km sinistral displacement between the Menderes Massif and the Beydaǧları platform during the exhumation of the Menderes Massif, mainly during the late Miocene. Based on GPS velocities Barka and Reilinger (1997) proposed that the fault zone is still active and accommodates sinistral displacement. In order to test the presence and to unravel its kinematics we have conducted a rigorous paleomagnetic study containing more than 3000 paleomagnetic samples collected from 88 locations and 11700 fault slip data collected from 198 locations distributed evenly all over SW Anatolia spanning from Middle Miocene to Late Pliocene. The obtained rotation senses and amounts indicate slight (around 20°) counter-clockwise rotations distributed uniformly almost whole SW Anatolia and there is no change in the rotation senses and amounts on either side of the FBFZ implying no differential rotation within the zone. Additionally, the slickenside pitches and constructed paleostress configurations, along the so called FBFZ and also within the 300 km diameter of the proposed fault zone, indicated that almost all the faults, oriented parallel to subparallel to the zone, are normal in character. The fault slip measurements are also consistent with earthquake focal mechanisms suggesting active extension in the region. We have not encountered any significant strike-slip motion in the region to support presence and transcurrent nature of the FBFZ. On the contrary, the region is dominated by extensional deformation and strike-slip components are observed only on the NW-SE striking faults which are transfer faults that accommodated extension and normal motion. Therefore, we claim that the sinistral Fethiye Burdur Fault (Zone) is a myth and there is no tangible

  14. Frente Popular, Modernização e Revolução Passiva no Chile

    Directory of Open Access Journals (Sweden)

    Aggio Alberto

    1997-01-01

    Full Text Available Discute-se, neste texto, o significado dos 14 anos de governos Radicais que se seguiram à vitória da Frente Popular em 1938. Neste período, o Chile conseguiu combinar crescimento econômico e democracia representativa, alcançando um grau nada desprezível de modernização. Ruptura e continuidade compõem o par indissolúvel do percurso modernizador vivido a partir da Frente Popular, quando se instituiu um novo nexo entre economia, política e relações sociais. O período é caracterizado como uma modalidade específica de revolução passiva, responsável pela atualização da ordem capitalista no país.

  15. OS EMPREGADOS DE LINHA DE FRENTE NO AMBIENTE DE SERVIÇOS: PARADOXOS, CONFLITOS E AMBIGUIDADES

    Directory of Open Access Journals (Sweden)

    George dos Reis Alba

    2013-12-01

    Full Text Available Os empregados de linha de frente (ELFs sofrem o paradoxo das pressões oriundas das demandas da organização, pressionando o atendimento de metas, e dos clientes, que exigem tratamento personalizado dos prestadores de serviços. Dentro desse contexto, o presente artigo tem como objetivo principal verificar paradoxos, conflitos e ambiguidades na linha de frente de uma empresa de serviços brasileira. A organização pesquisada é uma instituição pública do segmento bancário, e o método adotado é um estudo de caso. Os principais resultados desta pesquisa confirmam a presença de paradoxos, conflitos e ambiguidades para os empregados de linha de frente e apontam diversas falhas na gestão ao lidar com essas situações no dia-dia de trabalho. O estudo mostra que a organização foca seu esforço em cobrar do pessoal interno o sucesso em termos de metas, mas nem sempre dá o suporte necessário para alcançá-las. O presente trabalho aprofunda os estudos referentes ao conflito vivido pelos empregados de linha de frente, contribuindo para a teoria e favorecendo a prática da administração dos recursos humanos nas instituições bancárias e nas demais instituições que atuam diretamente com o público.

  16. Las cooperativas: Una alternativa económica y social frente a la crisis

    Directory of Open Access Journals (Sweden)

    Javier Divar Garteiz-Aurrecoa

    2013-12-01

    Full Text Available El Cooperativismo nació como alternativa económica y social, impulsado por la piedad religiosa y reglado bajo los principios democráticos. La solidaridad y la democracia económica hacen de las cooperativas  sociedades especialmente resistentes frente a las dificultades económicas.Recibido: 29.05.2013Aceptado: 26.06.2013

  17. Fagoterapia frente a infecciones por Staphylococcus aureus meticilino resistente en ratones

    Directory of Open Access Journals (Sweden)

    Jesús H Tamariz

    Full Text Available Objetivos: Evaluar la actividad de los bacteriófagos frente a infecciones localizadas y sistémicas producidas por Staphylococcus aureus resistente a meticilina (MRSA Materiales y métodos. Se realizó un estudio de tipo experimental en 45 ratones de la cepa Balb/c divididos en nueve grupos de cinco individuos. Se aislaron diez bacteriófagos nativos a partir de muestras clínicas y efluentes hospitalarios, se evaluó su capacidad lítica y su espectro de actividad, en base a lo cual se seleccionaron seis fagos para los ensayos de fagoterapia. Adicionalmente, se empleó un bacteriófago de origen comercial. La fagoterapia fue evaluada mediante profilaxis y terapia de infecciones localizadas y sistémicas causadas por la inoculación de MRSA por vía subcutánea y endovenosa respectivamente. Se probó la efectividad de tres esquemas terapéuticos: monoterapia, cóctel de fagos en múltiples dosis y de cóctel de fagos en una sola dosis. También se comparó la actividad terapéutica de los fagos frente a vancomicina y clindamicina. Resultados. El cóctel de fagos y la terapia a diversas dosis fueron efectivos para prevenir y controlar infecciones localizadas por MRSA, su actividad fue similar a la de vancomicina y clindamicina. La dosis única del cóctel de fagos no logró controlar la infección localizada; asimismo, la fagoterapia no resultó efectiva en infecciones sistémicas. Conclusiones. La fagoterapia se proyecta como una alternativa viable frente a infecciones causadas por MRSA. Se requieren estudios que evalúen aspectos relacionados con la inocuidad de los fagos frente al paciente

  18. The origins of the Frente para la Victoria in Argentina (1988-2003

    Directory of Open Access Journals (Sweden)

    Pamela SOSA

    2017-10-01

    Full Text Available The article reconstructs the trajectory of the Frente para la Victoria in the Argentinean province of Santa Cruz between 1988 y 2003. Period during which this political force was formed, forged its main attributes and amass the political capital that allow it to reach the presidency of the Nation in 2003, position that holds to December 2015. This organization was built outside the dominant structures and groups of the provincial politics.

  19. Spatio-Temporal Variation in Water Quality of Orle River Basin, S.W. ...

    African Journals Online (AJOL)

    Spatio-Temporal Variation in Water Quality of Orle River Basin, S.W. Nigeria. ... Abstract. The water quality of small streams in Auchi area of Edo State, S.W. Nigeria was investigated with a view to ... and ecosystems. The study was carried out

  20. The Importance of Interfaces: A HW/SW Codesign Case Study

    DEFF Research Database (Denmark)

    Jensen, Dan C. Raun; Madsen, Jan; Pedersen, Steen

    1997-01-01

    This paper presents a codesign case study in image analysis. The main objective is to stress the importance of handling HW/SW interfaces more precisely at the system level. In the presented case study, there is an intuitive and simple HW/SW interface, which is based upon the functional modules...

  1. Frentes de ondas (wavefronts e limites da visão humana Parte 1: fundamentos

    Directory of Open Access Journals (Sweden)

    Jankov Mirko

    2002-01-01

    Full Text Available A luz se propaga uniformemente a partir de um ponto luminoso na mesma velocidade em todas as direções. Sua posição em cada determinado momento é uma esfera formada juntando-se todos os pontos em uma mesma fase e tendo como centro a sua própria fonte. Tais superfícies esféricas imaginárias chamam-se frentes de luz ou frentes de ondas. Há três fatores limitadores de detalhes mais finos para o olho humano: óptico (por causa da dispersão, difração, aberração cromática e aberração monocrom��tica, retínico e neural (limitação máxima de acuidade visual de aproximadamente 2,0 ou 20/10.Um sistema de equações matemáticas, polinômios de Zernike, pode definir superfícies geométricas para descrever aberrações ópticas monocromáticas, tanto as de baixa ordem ('prisma', 'esfera' e 'astigmatismo', quanto às de alta ordem ('coma', 'aberração esférica' e outros. Medida das aberrações ópticas nos dá informação sobre o desempenho total de todos os elementos ópticos do olho em conjunto. Dois sistemas descritos aqui, o aberrômetro baseado no princípio de Tscherning e o originado do sensor Hartmann-Shack, têm a mesma lógica: comparar a posição atual das frentes de onda com a ideal, calcular matematicamente qual é a superfície geométrica que descreve essa discrepância e representá-la em termos de polinômios de Zernike. A topografia corneana computadorizada também pode, com "software" adequado, descrever as frentes de ondas definidas por irregularidades corneanas com polinômios de Zernike, porém tal caracterização representa somente a superfície anterior da córnea. Em conclusão, a tecnologia de frentes de ondas oferece nova maneira de quantificar e classificar os erros de imagem óptica do olho humano. O próximo artigo abordará as peculiaridades da análise de frentes de ondas, bem como algumas aplicações clínicas e cirúrgicas no dia-a-dia da prática oftalmológica.

  2. Melitofilia em Canavalia rosea (Sw. DC. (Leguminosae-Papilionoideae

    Directory of Open Access Journals (Sweden)

    Fábio Verçoza

    2010-11-01

    Abstract. This work aimed to study the floral biology and the pollination’s ecology of Canavalia rosea (Sw. DC. (Leguminosae-Papilionoideae by bees in the sandbank vegetation of the Grumari Environmental Protection Area (EPA , located in the western zone of Rio de Janeiro’s city. The study was developed between the months of June of 2008 to June of 2009. Sampling on morphology, color and odor of the flowers of the species were made. The number of open flowers per day in each individual was recorded, as well as the opening steps, determining the period of anthesis. The occurrence of floral visitors was recorded through the observation of the visit’s time, of the adaptability for pollination, of the ease of access to the reward and of the intra-floral behavior played. C. rosea occurs in psamophily communities and in post-beach sandbank of Grumari’s EPA. It presents typical characteristics of mellitophily (pollination by bees and the flowers are pollinated by Xylocopa frontalis Oliver. It also receives visits from Tetragonisca angustula Latreille, Trigona spinipes Fabricius and Apis mellifera Linnaeus, which collects pollen without pollinating the flowers. X. frontalis proved to be the only effective pollinator of C. rosea in the Grumari sandbank, making the plant directly dependent on this species for fruit and seed’s production in this location.

  3. Sedimentological characteristics and seafloor failure offshore SW Taiwan

    Directory of Open Access Journals (Sweden)

    Chih-Chieh Su

    2018-01-01

    Full Text Available In this study, analysis results reveal two main deposition zones are located at the flank of upper Gaoping Submarine Canyon and Lower Fangliao Basin offshore SW Taiwan. The non-event related sediments deposited in past 150 years (i.e., 632 Mt km-2 was delivered and transported from Gaoping River by suspension process with tides and coastal currents and gradually spread out offshore. Meanwhile, the total mass of accumulation sediments is 1922 Mt km-2, accounting for 40% Gaoping River’s sediment load and suggesting that the deposition process is mainly controlled by natural hazards. Sedimentation rates in much of the study area, except in the main deposition zones, are less than 0.5 cm yr-1 (5 m kyr-1. Compared with the studies at the instability seafloor caused by high sedimentation rates (~30 m kyr-1, the offshore southwestern Taiwan is relatively stable. In this study, we also discovered a series of sediment waves located on the upper continental slope between Gaoping and Fangliao Submarine Canyons, which is related to the creeping process on seafloor. In summary, our results reveal the fluid activities, existence of weak layers and earthquake triggering are potential factors which might induced seafloor failures offshore southwestern Taiwan.

  4. Growth inhibitory alkaloids from mesquite (Prosopis juliflora (Sw.) DC.) leaves.

    Science.gov (United States)

    Nakano, Hiroshi; Nakajima, Eri; Hiradate, Syuntaro; Fujii, Yoshiharu; Yamada, Kosumi; Shigemori, Hideyuki; Hasegawa, Koji

    2004-03-01

    Plant growth inhibitory alkaloids were isolated from the extract of mesquite [Prosopis juliflora (Sw.) DC.] leaves. Their chemical structures were established by ESI-MS, 1H and 13C NMR spectra analysis. The I50 value (concentration required for 50% inhibition of control) for root growth of cress (Lepidium sativum L.) seedlings was 400 microM for 3''''-oxo-juliprosopine, 500 microM for secojuliprosopinal, and 100 microM for a (1:1) mixture of 3-oxo-juliprosine and 3'-oxo-juliprosine, respectively. On the other hand, the minimum concentration exhibiting inhibitory effect on shoot growth of cress seedlings was 10 microM for 3''''-oxo-juliprosopine, 100 microM for secojuliprosopinal, and 1 microM for a (1:1) mixture of 3-oxo-juliprosine and 3'-oxo-juliprosine, respectively. Among these compounds, a (1:1) mixture of 3-oxo-juliprosine and 3'-oxo-juliprosine exhibited the strongest inhibitory effect on the growth of cress seedlings.

  5. Efectividad comunitaria de las vacunas frente a la Parotiditis Infecciosa. Estudio de casos

    Directory of Open Access Journals (Sweden)

    Limón Mora Juan

    1999-01-01

    Full Text Available FUNDAMENTO: En nuestro país existen dos tipos de vacunas disponibles frente a la parotiditis infecciosa. En los últimos tiempos se han planteado dudas sobre la eficacia global de estas vacunas y de la eficacia comparada entre ambas (cepa Rubini y cepa Jeryl Lynn. En el distrito sanitario de A.P. "Sevilla Este" se registraron 256 casos durante 1997 (90,1 casos por 100.000 habitantes. Con este estudio se pretende aprovechar la aparición de casos de parotiditis para evaluar poblaciones afectadas e incidencia comparada según tipo de vacuna recibida durante la infancia. MÉTODOS: Análisis descriptivo de los casos (edad, distribución territorial, antecedentes vacunales,... y análisis evolutivo (tasas de incidencia anuales en el distrito sanitario y su entorno. Se evalúa la efectividad global de las vacunas frente a la parotiditis. Igualmente se estiman las tasas de incidencia de casos entre los vacunados con cepa Rubini y Jeryl Lynn. RESULTADOS: Se observan las tasas de incidencias más elevadas en niños entre 1 y 4 años. Se han estimado niveles de efectividad global para estas vacunas. Además se observa una incidencia de casos significativamente más elevada entre los niños vacunados con cepa Rubini que en los que lo hicieron con Jeryl Lynn (riesgo relativo de 6,5 con Intervalo de confianza 95% 3,6-11,8. CONCLUSIONES: La efectividad que se desprende de este estudio no parece ser tan buena como la eficacia teórica preconizada para las vacunas frente a la parotiditis. Se plantea la conveniencia de realizar otros estudios de casos según tipos de vacunas utilizadas. Igualmente son de gran interés los datos a suministrar por estudios seroepidemiológicos.

  6. Creencias, prácticas y actitudes de mujeres embarazadas frente a las infecciones urinarias

    OpenAIRE

    Édgar Castro F.; Liliana Caldas A.; Carmita Cepeda; Briseida Huertas; Nini Jiménez

    2008-01-01

    En las vías urinarias de las mujeres embarazadas se producen cambios importantes, uno de ellos es ser propensas a padecer infección de vías urinarias. Tanto la bacteriuria asintomática, como la infección de vía urinaria (IVU) requieren detección y tratamiento oportunos para evitar complicaciones, y es en estos procesos en los cuales el papel activo y decidido de la actitud de la gestante frente a su cuidado y el apoyo del personal de enfermería son relevantes. Objetivo: describir las creen...

  7. Creencias, prácticas y actitudes de mujeres embarazadas frente a las infecciones urinarias

    OpenAIRE

    Castro F, Édgar; Caldas A, Liliana; Cepeda, Carmita; Huertas, Briseida; Jiménez, Nini

    2008-01-01

    En las vías urinarias de las mujeres embarazadas se producen cambios importantes, uno de ellos es ser propensas a padecer infección de vías urinarias. Tanto la bacteriuria asintomática, como la infección de vía urinaria (IVU) requieren detección y tratamiento oportunos para evitar complicaciones, y es en estos procesos en los cuales el papel activo y decidido de la actitud de la gestante frente a su cuidado y el apoyo del personal de enfermería son relevantes. Objetivo: describir las creencia...

  8. Vulnerabilidades frente amenazas naturales en establecimientos de salud de la Provincia de Santa Elena

    OpenAIRE

    Bertha De Monserrate

    2015-01-01

    Un equipo de análisis de riesgos de la Universidad Estatal Península de Santa Elena y Cooperazione Internationale durante el año 2010, llevó a cabo un estudio de vulnerabilidad de los establecimientos de salud de la provincia de Santa Elena frente a amenazas naturales de tsunami, inundación, erosión y movimiento en masa. El objetivo: evaluar los establecimientos de salud por tipos y nivel de atención, mediante la aplicación de los estándares establecidos en el Manual de Licenciamiento de Mini...

  9. Una lucha a "cielo abierto" : el caso del Frente Amplio Opositor a Minera San Xavier

    OpenAIRE

    Lamberti, María Julieta

    2010-01-01

    Se presenta un estudio de caso de un conflicto ecológico distributivo por la instalación de una empresa minera de tajo a cielo abierto desde la perspectiva de uno de los actores involucrados, el Frente Amplio Opositor a Minera San Xavier en Cerro de San Pedro, San Luis Potosí. Para dar cuenta del sentido que le otorgan los miembros del FAO a la instalación de la empresa en la comunidad se utilizan los procesos de enmarcado como herramienta de interpretación. I. La interpretación de los con...

  10. Vulnerabilidad y activos familiares frente a riesgos. Caso de estudio en Ixil, Yucatán

    Directory of Open Access Journals (Sweden)

    Norma Cecilia Sandoval Ayala

    2015-01-01

    Full Text Available En esta contribución se presenta un estudio de caso sobre percepciones sociales respecto a la vulnerabilidad de los activos familiares frente a riesgos de desastres en el municipio de Ixil, estado de Yucatán, México. Se aplicaron 81 encuestas a representantes de hogares de la comunidad y se realizaron diecinueve entrevistas semiestructuradas. Se encontró que los huracanes son un factor clave tanto en la percepción sobre la vulnerabilidad, como en las situaciones de riesgo que ocasionan pérdidas de activos en la región.

  11. Transformaciones de frentes de agua: la forma urbana como producto estándar

    OpenAIRE

    Talesnik, Daniel; Gutiérrez, Alejandro

    2002-01-01

    Diversas ciudades han transformado sus antiguas zonas portuarias convirtiéndolas en renovados frentes de agua. A partir de cuatro casos seleccionados (Baltimore, Sidney, Barcelona y Buenos Aires), el artículo subraya la estandarización del diseño y de los programas ejecutados en importantes renovaciones de waterfronts. Se propone una analogía con la cadena norteamericana de café Starbucks, con la cadena de restoranes de fast food McDonald’s y con los parques de entretención Disney. De escalas...

  12. Estilos de Personalidad y Afrontamiento Situacional Frente al Envejecimiento en la Mujer

    OpenAIRE

    Deisy Krzemien

    2007-01-01

    Este trabajo examina la relación entre estilos de personalidad y estilos y estrategias de afrontamiento frente a situaciones críticas del envejecimiento en adultas mayores. Una muestra de 212 participantes fue entrevistada acerca de eventos críticos experimentados en la vejez y evaluada mediante los cuestionarios MIPS y Brief-COPE. La mayoría de los estilos y estrategias de afrontamiento se asoció con determinados estilos de personalidad, en correspondencia a lo esperado según el ...

  13. Políticas sobre Sexualidad: Reportes desde las Líneas del Frente

    OpenAIRE

    Petchesky, Rosalind; Vianna, Adriana R. B.; Carrara, Sergio

    2008-01-01

    Políticas sobre sexualidad: reportes desde las líneas del frente, es un estudio comparativo de las políticas de sexualidad, la salud sexual y los derechos sexuales en ochos países y en dos instituciones mundiales. El trabajo contenido en Políticas sobre sexualidad ha sido desarrollado bajo el auspicio del Sexual Policy Watch [Observatorio de Políticas Sexuales] (SPW), un foro mundial compuesto por investigadores y activistas de una amplia gama de países y regiones del mundo. Inspirado en inic...

  14. Estudio experimental y numérico frente a impacto de material deportivo

    OpenAIRE

    Villamor Cuadrado, Luis Alexander

    2015-01-01

    En la actualidad el uso de diferentes plásticos y espumas foam se ha multiplicado en el campo del material deportivo gracias a su baja densidad y su facilidad de amoldarse a infinidad de formas. Otra de las razones por la cual la utilización de estos materiales se está potenciando es debido a las diferentes combinaciones entre sus compuestos, lo cual les confiere diferentes propiedades. El presente proyecto fin de grado pretende estudiar experimentalmente el comportamiento frente a impacto...

  15. La construcción de legitimidad del Frente para la Victoria (1988-1991 Frente para la Victoria's construction of legitimacy (1988-1991

    Directory of Open Access Journals (Sweden)

    Pamela Sosa

    2011-06-01

    Full Text Available El trabajo aborda la construcción de legitimidad del Frente para la Victoria (FV en el escenario político de Santa Cruz desde su nacimiento en 1988 hasta llegar a la gobernación en 1991. Se identifican tres fuentes de legitimidad construidas de manera alternativa al debilitamiento de la credibilidad de los partidos políticos tradicionales: la UCR, el PJ, el PI y el MID, entre otros. En este contexto, el Frente para la Victoria desplegó sus estrategias de legitimación apelando a la unidad de lo diverso y sumando referentes individuales de todo el arco político. Por otro lado, apeló a través de sus discursos y la conformación de los elencos y organizaciones a representar la fragmentación social propia de una sociedad compuesta por capas migratorias y, por último, construyó una novedosa oferta política a-partidaria acorde a las representaciones de la crisis estatal a mediados del '80 a partir de la reivindicación de los valores de la gestión, la eficiencia, el orden, el trabajo y la gobernabilidad. Sus estrategias de legitimación muestran cómo la primera etapa de construcción de poder político del FV fue efecto de su trayectoria en la frontera de los débiles grupos sociales y políticos.O trabalho aborda a construção de legitimidade do Frente para la Victoria (FV no cenário político de Santa Cruz desde seu nascimento em 1988 até chegar ao governo em 1991. Identificam-se três fontes de legitimidade construídas de maneira alternativa ao enfraquecimento da credibilidade dos partidos políticos tradicionais: a UCR, o PJ, o PI e o MID, entre outros. Neste contexto, o Frente para la Victoria desdobrou suas estratégias de legitimação apelando à unidade do que for diverso e somando referências individuais de todo o arco político. Por outro lado, apelou, através de seus discursos e a conformação dos elencos e organizações, a representar a fragmentação social própria de uma sociedade composta por camadas migrat

  16. [Overexpression of N-myc downstream regulated gene 2 (NDRG2) inhibits proliferation, migration and promotes apoptosis in SW480 rectal cancer cells].

    Science.gov (United States)

    Li, Zhiqiang; Sun, Yang; Wan, Hongxing; Chai, Fang

    2017-01-01

    Objective To investigate the role of N-myc downstream regulated gene 2 (NDRG2) gene in the proliferation, migration and apoptosis of rectal cancer cells. Methods Human rectal cancer SW480 cells were cultured and transfected with pCDNA3.1-NDRG2 and empty vector (SW480-Ve). SW480 cells were set as a control group. Cell proliferation was detected in SW480 cells, SW480-Ve cells and SW480-NDRG2 cells by MTT assay; cell migration distance in the three groups at 24, 48, 72 hours was tested by wound healing assay; apoptosis rate was determined in the three groups at 48 hours by flow cytometry; the expressions of Bax, caspase-3, Bcl-2 proteins in the three groups were examined by Western blotting. Results After the cells were cultured for 7 days, cell survival rate in SW480-NDRG2 group was significantly lower than that in SW480 cells and SW480-Ve cells; the cell survival rate decreased gradually with the prolongation of the culture time; and it had no significant difference between SW480-Ve group and SW480 group. Cell migration distance in SW480-NDRG2 group was significantly lower than that in SW480-Ve cells and SW480 cells, and it had also no significant difference between SW480-Ve cells and SW480 cells. The apoptosis rate in SW480-NDRG2 group was significantly higher than that in SW480 group and SW480-Ve group, and SW480 cells and SW480-Ve cells had no significant difference in the rate. The expressions of Bax and caspase-3 proteins in SW480-NDRG2 group were significantly higher than those in SW480 cells and SW480-Ve cells; Bcl-2 protein expression was significantly lower in SW480-NDRG2 group than in SW480 cells and SW480-Ve cells; and the expressions of Bax, caspase-3 and Bcl-2 proteins were not significantly different between SW480 cells and SW480-Ve cells. Conclusion Overexpression of NDRG2 can inhibit the proliferation, reduce cell migration, and promote cell apoptosis by regulating the expressions of Bcl-2, Bax and caspase-3 proteins in SW480 cells.

  17. Theoretical calculation of shakeup intensities using Xa--SW wave functions

    International Nuclear Information System (INIS)

    Tse, J.S.; Loubriel, G.

    1981-01-01

    The ground and 1s core hole state molecular wave functions of CH 4 , NH 3 , H 2 O, and HF obtained from Xa--SW calculations using the touching spheres (TS) and overlapping spheres (OS) approximations are used to calculate the intensity of shakeup satellites observed in their ls core level photoelectron spectra. The sudden approximation was assumed in the calculation. In case of TS Xa--SW wave functions, the one electron overlap integral inside the intersphere was calculated via Green's theorem. For OS Xa--SW wave functions, the integration over the awkwardly shaped intersphere region was circumvented by distributing the intersphere charge into the atomic spheres according to the charge partition scheme suggested by Case and Karplus. Our results show that there are no significant differences between the shakeup energies calculated from the TS and OS approximations. However, shakeup intensities calculated from TS Xa--SW wave functions are more reliable and in better numerical agreement with experiment

  18. Amphibians and agrochemicals: Dermal contact and pesticide uptake from irrigated croplands in SW Georgia

    Science.gov (United States)

    Background/Question/Methods Although isolated wetlands comprise a significant portion of amphibian breeding habitats throughout the United States, they are not protected under the Clean Water Act. In SW Georgia where agriculture is dominant within the landscape, many isolated ...

  19. seasonal variation in water quality of orle river basin, sw nigeria.

    African Journals Online (AJOL)

    LUCY

    The seasonal variation of water quality of Orle River and its tributatries in S.W. Nigeria was investigated forthnightly or two ... KEYWORD: water quality, river basin, wet and dry seasons; pollution. ..... Environmental Modeling and Software,.

  20. Wave hindcast experiments in the Indian Ocean using MIKE 21 SW ...

    Indian Academy of Sciences (India)

    Wave prediction and hindcast studies are important in ocean engineering, coastal ... wave data can be used for the assessment of wave climate in offshore and coastal areas. In the .... for the change in performance during SW monsoon.

  1. Redefinition of the genera Malaxis Sol. ex Sw. and Microstylis (Nutt. Eaton (Orchidaceae, Epidendroideae

    Directory of Open Access Journals (Sweden)

    Dariusz L. Szlachetko

    2011-01-01

    Full Text Available A new definition of the genera Malaxis Sol. ex Sw. and Microstylis (Nutt. Eaton is presented. The genera are briefly described and illustrated. A list of Microstylis species is added. Four new nomenclatural combinations are proposed.

  2. Dosimetric properties of a Solid Water High Equivalency (SW557) phantom for megavoltage photon beams.

    Science.gov (United States)

    Araki, Fujio

    2017-07-01

    The dosimetric properties of the recently developed SW557 phantom have been investigated by comparison with those of the existing SW457 phantom in megavoltage photon beams. The electron fluence ratio φ pl w , and chamber ionization ratio k pl , of water to SW457 and water to SW557 for 4-15MV photons were calculated as a function of depth using Monte Carlo simulations, and compared with measured values. Values of φ pl w for SW457 were in the range of 1.004-1.014 for 4MV, and 1.014-1.018 for 15MV photons. The φ pl w for SW557 ranged from 1.005 to 1.008 for 4MV and from 1.010 to 1.015 for 15MV photons and the variation of φ pl w with depth for each beam energy was within ±0.5%. Values of k pl were obtained with a PTW 30013 Farmer-type ionization chamber. The k pl for SW457 ranged from 0.997 to 1.011 for 4-15MV photons. Values of k pl for SW557 were almost unity for 4 and 6MV photons, while in the case of 10 and 15MV photons they were less than 1.006, excepting the build-up region. The measured and calculated k pl values of water to SW557 were in the range of 0.997-1.002 and 1.000-1.006, respectively, for 4-15MV photons, at a depth of 10cm with a source-to-axis distance of 100cm. The measured and calculated k pl values were in agreement within their uncertainty ranges. As a water-equivalent phantom, SW557 can be used with a dosimetric difference within±0.6%, for 4-15MV photons, and is more water-equivalent than SW457 in megavoltage photon beams. Copyright © 2017 Associazione Italiana di Fisica Medica. Published by Elsevier Ltd. All rights reserved.

  3. Hot topics in Modern Cosmology - SW9 - Slides of the presentations

    International Nuclear Information System (INIS)

    Berezhiani, Z.; Sigl, G.; Biondi, R.; Volkov, M.; Noller, J.; Starobinsky, A.; Toporensky, A.; Renaux, S.; Pilo, L.; Comelli, D.; Slagter, R.; Novello, M.; Padilla, A.; Antunes, V.; Kamenshchik, A.; Vernieri, D.; Kaloper, N.; Denkiewics, T.; Gohar, H.; Zahariade, G.; Frusciante, N.; Von Strauss, M.

    2016-01-01

    This 9. Spontaneous Workshop (SW9) brought together specialists on recent insights in Particle Physics, Astrophysics and Cosmology. The aim was to stimulate debate on common topics in views of providing us with innovating ideas. SW9 topics includes: 1) Cosmological parameters - Anomalies in CMB (Cosmic Microwave Background); 2) Dark matter and neutrinos; 3) Gravity - Dark energy; 4) Singular universes; and 5) Cosmological Large Scale Structures - Magnetic Fields; This document is made up of the slides of the presentations

  4. Sea urchins, their predators and prey in SW Portugal

    Directory of Open Access Journals (Sweden)

    Nuno Mamede

    2014-06-01

    Full Text Available Sea urchins play a key role structuring benthic communities of rocky shores through an intense herbivory. The most abundant sea urchin species on shallow rocky subtidal habitats of the SW coast of Portugal is Paracentrotus lividus (Echinodermata: Echinoidea. It is considered a key species in various locations throughout its geographical distribution by affecting the structure of macroalgae communities and may cause the abrupt transformation of habitats dominated by foliose algae to habitats dominated by encrusting algae - the urchin barrens. The removal of P. lividus predators by recreational and commercial fishing is considered a major cause of this phenomenon by affecting the trophic relationships between predators, sea urchins and algae communities. Marine protected areas (MPAs usually lead to the recovery of important predator species that control sea urchin populations and restore habitats dominated by foliose macroalgae. Therefore, MPAs provide a good opportunity to test cascading effects and indirect impacts of fishing at the ecosystem level. The ecological role of P. lividus was studied on rocky subtidal habitats of the SW coast of Portugal (Alentejo considering three trophic levels: population of P. lividus, their predators (fish and shellfish and their prey (macroalgae communities. Several studies were conducted: (1 a non-destructive observational study on the abundance and distribution patterns of P. lividus, their predators and preys, comparing areas with different protection; (2 a manipulative in situ study with cages to assess the role of P. lividus as an herbivore and the influence of predation; (3 a descriptive study of P. lividus predators based on underwater filming; (4 and a study of human perception on these trophic relationships and other issues on sea urchin ecology and fishery, based on surveys made to fishermen and divers. Subtidal studies were performed with SCUBA diving at 3-12 m deep. Results indicate that in the

  5. Tamarugite from Diana Cave (SW Romania) -first true karst occurrence

    Science.gov (United States)

    Pušcaš, C. M.; Onac, B. P.; Effenberger, H. S.; Povarǎ, I.

    2012-04-01

    Diana Cave is located within the town limits of Baile Herculane (SW Romania) and develops as a 14 m long, westward oriented, unique passage guided by the Diana fault [1]. At the far end of the cave, the thermo-mineral Diana Spring wells forth. In the early 1970s a mine gallery that intersected the cave was created to drain the water into a pumping station and the original cave passage was somewhat altered and reinforced with concrete. Today the concrete and the silty limestone cave walls are heavily corroded by H2SO4 outgassing from the hot water (ca. 50°C) and display abundant gypsum crusts, soggy aggregates of native S, and a variety of more exotic sulfates. Among them, a mineral that has been previously identified in caves only in connection to volcanic activity, either as thermal springs or fumaroles [2]: tamarugite [NaAl(SO4)26H2O]. It was [3] that first mentioned the occurrence of this Na and Al sulfate in Diana Cave, our research aiming to give a detailed description of this mineral, its paragenesis, and mechanisms of precipitation. Recently, tamarugite has also been identified in a sulfuric acid cave from Greece [4]. Along with powder X-ray diffractions coupled with Rietveld refinement, scanning electron microscope, and electron probe micro-analysis, δ18O and δ34S compositions of the sulfate mineral as well as precipitates from the water were analyzed to identify and better constrain the genesis of this rare sulfate. Regrettably, the crystal size of our specimens is inappropriate for identification by means of single crystal X-ray diffraction. Physical and chemical parameters of Diana Spring were as well measured on several occasions. Geochemical analysis suggests that the minute, white tamarugite flakes precipitated in Diana Cave as a result of the interactions between the thermo-mineral water or water vapor and the original limestone bedrock and concrete that blankets the mine gallery. [1] Povara, I., Diaconu, G., Goran, C. (1972). Observations pr

  6. Alimento ou medicamento?: Espécies vegetais frente à legislação brasileira

    Directory of Open Access Journals (Sweden)

    L.O. Lima

    Full Text Available O uso de espécies vegetais como fonte terapêutica e alimentícia tem apresentado significativo crescimento nos últimos anos, em especial no território brasileiro que é dotado de grande biodiversidade. A regulamentação dessas categorias de produtos envolve uma vasta lista de legislações, o que gera dificuldades no entendimento regulatório. Este trabalho teve por objetivo diferenciar algumas das classes de alimentos e medicamentos baseados em espécies vegetais e expor as legislações pertinentes a cada caso. Foi realizado um levantamento bibliográfico e documental com base no acervo regulatório brasileiro atual e os principais dados foram compilados em forma de tabela. Este trabalho permitiu visualizar uma parte do universo legal referente aos produtos de origem vegetal, o que é essencial para o enquadramento correto dessas espécies frente a legislação, bem como seu comércio, propaganda e uso regular e seguro. Isto é fundamental frente à valorização emergente das espécies vegetais dentro do sistema público de saúde brasileiro de acordo com as exigências regulatórias de cada categoria.

  7. Una verdad "incómoda"… que es preciso difundir y frente a la que hay que actuar urgentemente

    Directory of Open Access Journals (Sweden)

    Educadores por la Sostenibilidad

    2007-04-01

    Full Text Available Al Gore será recordado, muy probablemente, no tanto por haber sido vicepresidente de EEUU junto a Bill Cinton o por perder la presidencia frente a George Bush (pese a haber obtenido más votos, sino por sus preocupaciones en torno a la degradación del medio ambiente y la supervivencia de la especie humana que le han llevado recientemente, en particular, a difundir “An inconvenient truth” (una verdad incómoda: la gravedad de un cambio climático ya en marcha, sus causas y la necesidad de hacerle frente con la mayor urgencia

  8. Conductas sexuales de riesgo y actividades preventivas frente al cáncer de cuello uterino en mujeres universitarias vacunadas frente al VPH

    Directory of Open Access Journals (Sweden)

    Ana Fernández-Feito

    2018-05-01

    Full Text Available Resumen: Objetivo: Estimar la asociación entre la vacunación frente al virus papiloma humano (VPH y las conductas sexuales de riesgo, así como la participación en el Programa de Detección Precoz de Cáncer de Cuello Uterino (PDPCCU. Diseño: Estudio descriptivo transversal. Emplazamiento: Facultad de Medicina y Ciencias de la Salud, Facultad de Derecho y Facultad de Economía y Empresa (Universidad de Oviedo. Participantes: Estudiantes universitarias. Mediciones principales: Se recogió información sobre métodos anticonceptivos, conducta sexual, conocimientos sobre VPH y participación en el PDPCCU. Se estimaron proporciones y odds ratio (OR con sus correspondientes intervalos de confianza al 95% (IC 95%. Resultados: El 67,7% de la muestra estaban vacunadas frente al VPH. Un total de 216 mujeres (65,3% eran sexualmente activas. El 67,6% utilizaba un método de barrera en la relación actual, siendo menos frecuente entre las mujeres no vacunadas (54,9% frente al 75,4% en estudiantes vacunadas (p = 0,002. El riesgo de mantener al menos una conducta sexual de riesgo era mayor entre las mujeres no vacunadas: OR 2,29 (IC 95%: 1,29-4,07. La probabilidad de realizar una citología dentro del PDPCCU fue mayor entre las mujeres no vacunadas: OR 2,18 (IC 95%: 1,07-4,47. Conclusiones: La prevalencia de conductas sexuales de riesgo en mujeres no vacunadas es elevada y se relaciona con la no utilización de métodos de barrera. La vacunación frente al VPH puede influir en la conducta sexual y en la participación en PDPCCU. Se debería reforzar la información que reciben los jóvenes sobre anticoncepción, enfermedades de transmisión sexual y prevención del cáncer. Abstract: Aim: To estimate the association between the human papillomavirus (HPV vaccine and sexual risk behaviour, as well as the participation in the Cervical Cancer Screening Program (CCSP. Design: Cross-sectional study. Location: School of Medicine and Health Sciences

  9. Silicate melt metasomatism in the lithospheric mantle beneath SW Poland

    Science.gov (United States)

    Puziewicz, Jacek; Matusiak-Małek, Magdalena; Ntaflos, Theodoros; Grégoire, Michel; Kukuła, Anna

    2014-05-01

    The xenoliths of peridotites representing the subcontinental lithospheric mantle (SCLM) beneath SW Poland and adjacent parts of Germany occur in the Cenozoic alkaline volcanic rocks. Our study is based on detailed characterization of xenoliths occurring in 7 locations (Steinberg in Upper Lusatia, Księginki, Pilchowice, Krzeniów, Wilcza Góra, Winna Góra and Lutynia in Lower Silesia). One of the two major lithologies occurring in the xenoliths, which we call the "B" lithology, comprises peridotites (typically harzburgites) with olivine containing from 90.5 to 84.0 mole % of forsterite. The harzburgites contain no clinopyroxene or are poor in that mineral (eg. in Krzeniów the group "B" harzburgites contain pfu in ortho-, and pfu in clinopyroxene). The exception are xenoliths from Księginki, which contain pyroxenes characterised by negative correlation between mg# and Al. The REE patterns of both ortho- and clinopyroxene in the group "B" peridotites suggest equilibration with silicate melt. The rocks of "B" lithology were formed due to alkaline silicate melt percolation in the depleted peridotitic protolith. The basaltic melts formed at high pressure are usually undersaturated in both ortho- and clinopyroxene at lower pressures (Kelemen et al. 1992). Because of cooling and dissolution of ortho- and clinopyroxene the melts change their composition and become saturated in one or both of those phases. Experimental results (e.g. Tursack & Liang 2012 and references therein) show that the same refers to alkaline basaltic silicate melts and that its reactive percolation in the peridotitic host leads to decrease of Mg/(Mg+Fe) ratios of olivine and pyroxenes. Thus, the variation of relative volumes of olivine and orthopyroxene as well as the decrease of mg# of rock-forming silicates is well explained by reactive melt percolation in the peridotitic protolith consisting of high mg# olivine and pyroxenes (in the area studied by us that protolith was characterised by olivine

  10. Lithological indicators of loess sedimentation of SW Poland

    Directory of Open Access Journals (Sweden)

    Krawczyk Marcin

    2017-12-01

    Full Text Available High-resolution grain-size investigations were carried out in two SW Polish loess sections: Biały Kościół (Niemcza-Strzelin Hills and Zaprężyn (Trzebnica Hills. Each sequence was sampled by using the same methodology and samples were taken at 5 centimeters intervals. The particle size distribution was obtained with a Mastersizer 2000 laser, used for diffraction methods. From the obtained results the basic parameters and grain size indicators were calculated: Mz, Grain Size Index ratio, U-ratio and the percentage content of clay ( 63 μm. Both loess-soil sequences are composed of interfluve and slope loess facies and consist of five litho-pedostratigraphic units developed during the Late Pleistocene and Holocene: two loess units L1LL1, L1LL2 and three polygenetic fossil soils sets S0, S1 and L1SS1. The distance between these two profiles is about 60 km. Zaprężyn, as a section located more to the north, has almost no lower younger loess and higher level of weathering which could be related to proximity of this site to the Ice Sheet margin. The climate here was more extreme and harsh. What is more, the difference in development of soil L1SS1 can be observed: while in Biały Kościół pedogenesis process was slower and less disturbed than in Zaprężyn. The upper part of L1SS1 in Biały Kościół was deformed by gelifluction, frost heave and other periglacial processes. Mz indicator by the grain-size distribution in these sediments reflects subtle variations in the climatic system. Moreover, in Zaprężyn the content of sand fraction is higher than in Biały Kościół what can be the evidence of short episodes of strong winds during cold period of sedimentation. The aim of this paper is to compare two loess profiles by their stratigraphical and lithological similarities which are result of climate conditions and features of surrounding environment.

  11. Susceptibilidad y autoeficacia frente al VIH/Sida en adolescentes de Cali-Colombia

    Directory of Open Access Journals (Sweden)

    Ana Fernanda Uribe Rodríguez

    2009-01-01

    Full Text Available Los adolescentes y las adolescentes constituyen una de las poblaciones con mayor riesgo frente al Virus de Inmunodeficiencia Humana (VIH y el Síndrome de Inmunodeficiencia Adquirida (Sida, por sus prácticas sexuales y comportamientos de riesgo que los exponen constantemente a enfermedades de transmisión sexual. Dada la importancia de la prevención en los jóvenes y las jóvenes, el objetivo de este estudio fue identificar la percepción de susceptibilidad frente al VIH/Sida y la autoeficacia en el uso del preservativo en adolescentes de la ciudad de Santiago de Cali. Esta investigación fue de tipo no experimental, con un diseño transversal exploratorio descriptivo, con una muestra de 217 adolescentes entre los 12 y los 18 años de edad, conformada por dos grupos de jóvenes (Montero & León, 2002. Encontramos diferencias significativas en la autoeficacia en función del género (p< 0,003 y la edad (p< 0,005, y en la susceptibilidad en función del género (p< 0,006. Concluimos que los jóvenes y las jóvenes con mayor predisposición al VIH/Sida son adolescentes varones entre los 16 y los 18 años de edad, que pertenecen a estratos socioeconómicos bajos; y que las mujeres jóvenes tienen mayor susceptibilidad y autoeficacia frente al VIH/Sida que los varones, lo cual posiblemente las hace más proactivas en la prevención de enfermedades como el VIH/Sida. De cualquier modo, los datos de esta investigación y los altos índices de VIH/Sida en los adolescentes y las adolescentes permiten considerar como prioritaria la realización de programas de prevención en salud sexual y reproductiva, que tengan en cuenta las necesidades propias de la población adolescente, sus características sociodemográficas (género, edad, estrato y sus condiciones psicopatológicas.

  12. Ecología y gestión de las especies de Quercus frente al cambio global

    OpenAIRE

    Marañón, Teodoro; Pérez-Ramos, Ignacio Manuel; Villar Montero, Rafael

    2013-01-01

    Comunicación oral S.04-20-O, presentada en la Sesión 04: Quercus: decaimiento, regeneración y gestión frente al cambio global, del citado congreso celebrado del 6-10, mayo, 2013, en Pamplona-Iruña, España.

  13. Asesoría en la toma de decisiones frente al aborto

    Directory of Open Access Journals (Sweden)

    Vanegas Blanca Cecilia

    1994-11-01

    Full Text Available

    Uno de los dilemas éticos más frecuentes a que se ve enfrentado el profesional de salud, se presenta cuando una mujer o pareja solicita asesoría en la toma de decisiones frente al aborto provocado, como alternativa de solución al embarazo indesearlo. El artículo hace una serie de reflexiones a considerar, antes de tomar la decisión, tales como: la gravedad del problema, el drama de la mujer, aspectos religiosos, éticos y consecuencias en el hijo indeseado. Finalmente, propone una serie de pasos que guían al profesional de salud para ofrecer la asesoría y reflexiones sobre su participación en medidas preventivas.

  14. ¿Qué hacen los periodistas frente a los políticos corruptos?

    Directory of Open Access Journals (Sweden)

    Jaime López

    2015-01-01

    Full Text Available En América Latina la mayor parte de agresiones contra periodistas y medios son por represalias a sus reportajes sobre casos de corrupción, con excepción de Colombia. Al hablar del papel de la prensa frente a la corrupción se refiere a la prensa independiente, a aquellos periodistas que se mantienen distantes de los poderes económico y político y que han asumido la fiscalización de las instituciones y el papel de tribuna pública. Sin embargo, los periodistas no pueden suplantar el papel de los jueces o fiscales; así como tampoco pueden lograr mucho, si las sociedades están temerosas o apáticas.

  15. Communitarian biodigester: psychosocial and environmental repercussion in the community of Pueblo Nuevo in II Frente Municipality

    Directory of Open Access Journals (Sweden)

    David Dainer Matos-Mendoza

    2017-09-01

    Full Text Available The present research was made in the community of Pueblo Nuevo in II Frente Municipality, in Santiago de Cuba Province, with the objective to characterize the psychosocial and environmental repercussion that had the construction of a communitarian biodigester in their habitants. We depart from the theoretical perspectives of the Environmental Psychology, which base is the Historical-Cultural Approach. It was used the configurational methodology and the ethno-methodological method. The techniques employed were the observation and the half-structured interview. The main results point out that the construction of the biodigester influences positively in the transformation of the communitarian’s environmental consciousness, because they began to manifest behaviors and attitudes in function of taking care of the environment. Also it was reached a major risk perception related with the human actions that damage the environment, such as the improvement of the communitarian’s quality of life.

  16. CAPACIDAD ANTAGONISTA DE HONGOS CELULOLÍTICOS FRENTE A Fusarium sp. Y Macrophomina sp.

    Directory of Open Access Journals (Sweden)

    Néstor Leopoldo Tarazona Meza

    2014-12-01

    Full Text Available El objetivo de esta investigación fue evaluar la capacidad antagónica de ocho hongos celulolíticos nativos frente a los hongos fitopatógenos Fusarium sp. y Macrophomina sp. En primera instancia se determinó la cepa promisoria del hongo celulolítico, para lo cual, en caja Petri se colocó un disco de agar de 4 mm de diámetro con micelio de una cepa antagonista y en el extremo opuesto, a una distancia de cinco centímetros aproximadamente, otro disco de 4 mm con micelio de un patógeno. La capacidad antagónica se determinó por el grado de micoparasitismo y la competencia por nutrientes y espacios, registrando el porcentaje de inhibición del crecimiento radial. Con la cepa del hongo celulolítico que tuvo el mejor comportamiento antagonista se realizó un cocultivo independiente con cada patógeno, aquí se evalúo las UFC, crecidas en medio PDA. También se inoculó junto a las cepas fitopatógenas en plantas de pimiento para conocer el nivel de antagonismo en macetas. En la evaluación cualitativa, la cepa A.O-5 mostró una invasión y esporulación total en la superficie en ambos patógenos; mientras que en el cocultivo inhibe el crecimiento de los patógenos a las 96 h. Igualmente demostró su acción antagonista frente a Fusarium y Macrophomina en las plántulas de pimiento. Por lo encontrado, se estima que la cepa A.O-5 es un potencial agente antagonista de los fitopatógenos evaluados.

  17. Vulnerabilidades frente amenazas naturales en establecimientos de salud de la Provincia de Santa Elena

    Directory of Open Access Journals (Sweden)

    Bertha De Monserrate

    2015-10-01

    Full Text Available Un equipo de análisis de riesgos de la Universidad Estatal Península de Santa Elena y Cooperazione Internationale durante el año 2010, llevó a cabo un estudio de vulnerabilidad de los establecimientos de salud de la provincia de Santa Elena frente a amenazas naturales de tsunami, inundación, erosión y movimiento en masa. El objetivo: evaluar los establecimientos de salud por tipos y nivel de atención, mediante la aplicación de los estándares establecidos en el Manual de Licenciamiento de Ministerio de Salud Pública y diagnosticar el grado de vulnerabilidad de la ubicación geográfica de los establecimientos de salud frente a las amenazas naturales, mediante la superposición de mapas de distribución geográfica y los mapas preliminares de amenazas a desastres naturales de la Secretaria General de Riesgos definida desde las amenazas en base a la guía para implementar el análisis de vulnerabilidades a nivel cantonal de esta secretaría. Resultados: la provincia de Santa Elena cuenta con 75 unidades de salud, 29 pertenecen al Ministerio de Salud Pública y 46 a Organizaciones no gubernamentales, el 75% brindan atención de primer nivel y el 25% segundo nivel básico. El estudio de vulnerabilidad mostró que el hospital de Manglaralto, los subcentros de San Francisco de las Núñez, San Pablo, Monteverde y el dispensario de la Superintendencia de la Libertad califican muy alto, mientras que el resto se considera de alto a medio. El Ministerio de Salud Pública debe reubicar aquellos establecimientos calificados como muy alto y alto.

  18. Sr-Nd isotope systematics of xenoliths in Cenozoic volcanic rocks from SW Japan

    International Nuclear Information System (INIS)

    Kagami, Hiroo; Iwata, Masatoshi; Iizumi, Shigeru; Nureki, Terukazu.

    1993-01-01

    Based on new and previously published Sr and Nd isotope data, we examined the petrogenetic relationship between deep crust- and upper mantle-derived xenoliths contained in Cenozoic volcanic rocks and Cretaceous-Paleogene granitoid rocks in SW Japan. The deep crust- and upper mantle-derived mafic to ultramafic xenoliths contained in Cenozoic volcanic rocks from SW Japan have comparable initial Sr and Nd isotope ratios to the Cretaceous-Paleogene granitoid rocks in their respective districts. This may suggest that these xenoliths were genetically related to the Cretaceous-Paleogene granitoid rocks in SW Japan, and that regional variations in Sr and Nd isotope ratios observed in the granitoid rocks are attributed to differences in the geochemistry of the magma sources. (author)

  19. Perturbative determination of c{sub SW} with Symanzik improved gauge action and stout smearing

    Energy Technology Data Exchange (ETDEWEB)

    Horsley, R. [Edinburgh Univ. (United Kingdom). School of Physics; Perlt, H.; Schiller, A. [Leipzig Univ. (Germany). Inst. fuer Theoretische Physik; Rakow, P.E.L. [Liverpool Univ. (United Kingdom). Theoretical Physics Dept., Dept. of Mathematical Sciences; Schierholz, G. [Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)

    2007-10-15

    We determine the improvement factor c{sub SW} in one-loop lattice perturbation theory for the plaquette and Symanzik improved gauge actions. The fermionic action is O(a) clover improved with one-time stout smearing. c{sub SW} is derived from the one-loop correction to the quark-quark-gluon vertex in the off-shell regime. We give a first numerical value for the one-loop contribution to the non gauge-invariant improvement coefficient c{sub NGI} for the quark field using the plaquette action. A discussion of mean field improvement is included. (orig.)

  20. Análisis comparativo de morbilidad en grandes quemados tratados con sesiones de autoinjertos frente a cultivo de queratinocitos

    Directory of Open Access Journals (Sweden)

    M. Rubio-Yanchuck

    2015-09-01

    Full Text Available La cobertura rápida y eficaz de las lesiones es un factor limitante en el tratamiento de grandes quemados. Los autoinjertos siguen siendo el tratamiento de elección pero no están exentos de riesgos. El uso de sustitutos de piel cultivada (SPC puede llegar a reducir la morbilidad implícita en el uso de autoinjertos. El objetivo de este estudio es realizar un análisis comparativo de la morbilidad asociada al uso de queratinocitos y autoinjertos en pacientes tratados inicialmente con aloinjertos como cobertura temporal. Realizamos un análisis retrospectivo de morbilidad en 21 pacientes con una superficie corporal quemada (SCQ mayor o igual al 40% en el Hospital Universitario La Paz, Madrid (España entre 2011y 2015. Fueron divididos en 2 grupos según la cobertura definitiva utilizada: un primer grupo con sesiones de autoinjerto, y un segundo grupo con cultivos de queratinocitos y áreas menores de autoinjertos. Fueron 5 mujeres y 16 varones con media de edad de 40,38 años, SCQ del 60,43% y SCQ dérmico profunda-subdérmica del 59,05%. La media de cirugías necesarias en pacientes tratados con autoinjertos y SPC fue 5,36 y 6,7 respectivamente. La incidencia de sepsis fue 80 frente a 50%; el fracaso renal agudo del 63,6 frente al 50%; y de neumonía del 27.3 frente al 40%. Entre los pacientes que sobrevivieron la estancia media en Unidad de Cuidados Intensivos fue de 66,16 frente a 50,6 días, la estancia media hospitalaria fue de 75,6 frente a 63,3 días y la media del número de trasfusiones fue de 75,6 frente a 63.3. La complicación del lecho quirúrgico en el grupo de autoinjertos fue del 63% frente al 0% en los tratados con queratinocitos, y las necesidades medias de noradrenalina fueron de 0,1 frente a 0,03 µg/kg/min. Los pacientes con lecho quirúrgico complicado tuvieron unos requerimientos medios de noradrenalina de 0,117 frente a 0,044 en pacientes con lecho quirúrgico no complicado. Como conclusión, los pacientes tratados con

  1. Afrontamiento del estrés frente al examen en educación superior: ¿un estilo o un proceso?

    OpenAIRE

    Quintana Peña, Alberto Lollarte

    1998-01-01

    Contrasta dos enfoques teórico-metodológicos a fin de identificar los factores que explicarían las variables dependientes: ansiedad experimentada frente a los exámenes y modos de afrontamiento del estrés. Argumenta que los teóricos del Yo asumen a la ansiedad-rasgo frente a los exámenes como variable independiente de la ansiedad frente a los exámenes, y como variables independientes de los modos de afrontamiento al estrés al estilo de orientación personal (locus de control intemo-externo) y a...

  2. Actitudes y prácticas frente a la sexualidad de los homosexuales

    Directory of Open Access Journals (Sweden)

    Patricia Vélez-Laguado

    2015-06-01

    Full Text Available Objetivo: evaluar las actitudes y prácticas frente a la sexualidad de la comunidad de lesbianas, gais, bisexuales, transexuales, intersexuales y como estas influyen en su salud sexual y reproductiva. Materiales y Métodos: estudio cuantitativo, descriptivo de corte transversal. La población estudio fueron 335 homosexuales pertenecientes a una fundación X, la muestra correspondió a 180, a quienes se aplico el instrumento Actitudes y Prácticas frente a la Sexualidad de los Homosexuales. Los criterios de inclusión fueron ser homosexual ser mayor de 18 años, haber tenido experiencias sexuales homosexuales, no presentar enfermedades mentales y participar voluntariamente. Resultados: predominaron los gais en un 50,5%, el estado civil preponderante fue soltero con un 70,6%; la edad predominante fue 24 a 29 años, y el nivel educativo más frecuente fue secundaria completa 27,7%; en cuanto a información de experiencias sexuales la primera experiencia física fue sexo con 52,2%, el 61,1% inició su vida sexual entre los 14 y 19 años; el 43,9% ha tenido de 11 a 20 compañeros sexuales, y en los últimos 6 meses el 65% ha tenido relaciones sexuales ocasionales, en actitudes el 43,9% dio a conocer su orientación sexual a amigos. En prácticas el 58,4% conoce a sus parejas sexuales por amigos; en desarrollo y actividad en salud sexual y reproductiva el 8,9% ha presentado infecciones de transmisión sexual y ha recibido tratamiento completo, el 56,7% no utilizó preservativo en su primera relación sexual, y solo el 54,4% sabe que es el cáncer genital. Conclusión: Según las variables planteadas las actitudes y las prácticas de los homosexuales si afectan su salud sexual y reproductiva.

  3. Transformaciones de frentes de agua: la forma urbana como producto estándar

    Directory of Open Access Journals (Sweden)

    Daniel Talesnik

    2002-09-01

    Full Text Available Diversas ciudades han transformado sus antiguas zonas portuarias convirtiéndolas en renovados frentes de agua. A partir de cuatro casos seleccionados (Baltimore, Sidney, Barcelona y Buenos Aires, el artículo subraya la estandarización del diseño y de los programas ejecutados en importantes renovaciones de waterfronts. Se propone una analogía con la cadena norteamericana de café Starbucks, con la cadena de restoranes de fast food McDonald’s y con los parques de entretención Disney. De escalas diferentes, los emprendimientos mencionados se caracterizan por presentarse desligados de los lugares físicos donde se localizan y por construir una nueva experiencia. Se sostiene que en la mayoría de los casos escogidos, el frente de agua renovado es ajeno a su medio y parece tener más que ver con un centro comercial que con un nuevo espacio público en la ciudad. Sin embargo, con el tiempo, gran parte de los ejemplos han fundado una nueva categoría de espacio público, se han convertido en hitos dentro de las ciudades y responden a la necesidad del ciudadano de tener nuevos lugares de recreación y encuentroCountless cities throughout the world have renewed their old port areas turning them into new waterfronts. Starting from four selected cases (Baltimore, Sidney, Barcelona and Buenos Aires, this article underlines the fact that many of the new waterfronts have been renewed with standardized forms and programs. There is an analogy between Starbuck’s coffeshops, McDonald’s fastfood restaurants and Disney theme parks. In different scales the last three cases have the common characteristic of building a new experience, places unlinked to their physical environment. The majority of the chosen study cases are new waterfronts that appear to be strangers to their surroundings. These new places appear to have more in common with a shopping mall than with a public space by the water’s edge. However, as time has gone by, these locations have

  4. On SW-minimal models and N=1 supersymmetric quantum Toda-field theories

    International Nuclear Information System (INIS)

    Mallwitz, S.

    1994-04-01

    Integrable N=1 supersymmetric Toda-field theories are determined by a contragredient simple Super-Lie-Algebra (SSLS) with purely fermionic lowering and raising operators. For the SSLA's Osp(3/2) and D(2/1;α) we construct explicitly the higher spin conserved currents and obtain free field representations of the super W-algebras SW(3/2,2) and SW(3/2,3/2,2). In constructing the corresponding series of minimal models using covariant vertex operators, we find a necessary restriction on the Cartan matrix of the SSLA, also for the general case. Within this framework, this restriction claims that there be a minimum of one non-vanishing element on the diagonal of the Cartan matrix. This condition is without parallel in bosonic conformal field theory. As a consequence only two series of SSLA's yield minimal models, namely Osp(2n/2n-1) and Osp(2n/2n+1). Subsequently some general aspects of degenerate representations of SW-algebras, notably the fusion rules, are investigated. As an application we discuss minimal models of SW(3/2, 2), which were constructed with independent methods, in this framework. Covariant formulation is used throughout this paper. (orig.)

  5. Unravelling the role of SW Sextantis stars in the evolution of cataclysmic variables

    Science.gov (United States)

    Araujo-Betancor, Sofia; Gansicke, Boris; Long, Knox; Rodriguez-Gil, Pablo

    2005-08-01

    SW Sextantis stars are a relatively large group of cataclysmic variables whose properties contradict all predictions made by the current CV evolution theories. Very little is known about the properties of their accreting white dwarfs and their donor stars, as the stellar components are usually outshone by an extremely bright accretion flow. Consequently, a proper assessment of their evolutionary state is illusionary. There is one particular behavior of the SW Sex stars that can allow us to overcome this problem: SW Sex stars exhibit low states during which accretion onto the white dwarf decreases or shuts off completely. Only during this rare occasions we can directly observe the white dwarf and the donor star in these systems, and measurements of the white dwarf temperature, spectral type of the donor, mass and distance to the system can be carried out. With this aim in mind, we have set up a long-term monitoring of a group of five SW Sex stars using the 1.3 m telescope at CTIO. Here we propose to activate follow-up TOOs to obtain optical spectra of the low states to accurately determine the fundamental properties of these systems.

  6. Study of the gamma irradiation effects on the PMMA/HA and PMMA/SW

    Energy Technology Data Exchange (ETDEWEB)

    Silva, P., E-mail: silva@ivic.v [Instituto Venezolano de Investigaciones Cientificas, Centro de Fisica, Carretera Panamericana Km. 11, Caracas 1020-A (Venezuela, Bolivarian Republic of); Albano, C. [Universidad Central de Venezuela, Facultad de Ingenieria (Venezuela, Bolivarian Republic of); Instituto Venezolano de Investigaciones Cientificas, Centro de Quimica (Venezuela, Bolivarian Republic of); Perera, R. [Departamento de Mecanica, Universidad Simon Bolivar, Caracas 1080-A (Venezuela, Bolivarian Republic of); Dominguez, N. [Instituto Venezolano de Investigaciones Cientificas, Centro de Quimica (Venezuela, Bolivarian Republic of)

    2010-03-15

    The behavior of the poly(methyl methacrylate) (PMMA) under the action of gamma radiation has been sufficiently studied. In this work, we present results from melt flow index (MFI), thermogravimetric analysis (TGA), differential scanning calorimetry (DSC) and electron paramagnetic resonance (EPR) of PMMA composites with hydroxyapatite (HA) and seaweed residues (SW) irradiated with gamma rays at 1.08 kGy/h. Composites of PMMA/HA and PMMA/SW with 10%, 20% and 30% of the filler were prepared. The results show an increase in the MFI values with the integral dose of radiation, being consistent with chain-scission reactions. No EPR signal was observed in pure PMMA, while in the composites, the typical EPR signal of the PMMA radicals was observed, which increased with the amount of HA or SW. When comparing the relative intensities of the EPR signals for both types of composites, a slight increase in the concentration of free radicals generated in the sample with SW respect to that of PMMA/HA composite was obtained. A decay of the total free radical concentration was observed as time elapsed.

  7. Hot topics in modern cosmology - SW6 - Slides of the presentations

    International Nuclear Information System (INIS)

    Starobinsky, A.A.; Gorbunov, D.; Reverberi, L.; Arbuzova, E.; Arbuzov, A.; Maeda, K.; Borowiec, A.; Moschella, U.; Karshenboim, S.; Tinyakov, P.; Watanabe, Y.; Deffrayet, C.; Pilo, L.; Rham, C. de; Fasiello, M.; Tolley, A.; Chernodub, M.; Kunze, K.; Berezhiani, Z.; Kamyshkov, Y.

    2014-01-01

    This spontaneous workshop (SW) brings together specialists on recent insights in particle physics, astrophysics and cosmology. The aim is to stimulate debates on common topics in views of providing the scientific community with innovating ideas. The main topics are gravity, dark matter and cosmological models. This document is made of the slides of the presentations.

  8. sw-SVM: sensor weighting support vector machines for EEG-based brain-computer interfaces.

    Science.gov (United States)

    Jrad, N; Congedo, M; Phlypo, R; Rousseau, S; Flamary, R; Yger, F; Rakotomamonjy, A

    2011-10-01

    In many machine learning applications, like brain-computer interfaces (BCI), high-dimensional sensor array data are available. Sensor measurements are often highly correlated and signal-to-noise ratio is not homogeneously spread across sensors. Thus, collected data are highly variable and discrimination tasks are challenging. In this work, we focus on sensor weighting as an efficient tool to improve the classification procedure. We present an approach integrating sensor weighting in the classification framework. Sensor weights are considered as hyper-parameters to be learned by a support vector machine (SVM). The resulting sensor weighting SVM (sw-SVM) is designed to satisfy a margin criterion, that is, the generalization error. Experimental studies on two data sets are presented, a P300 data set and an error-related potential (ErrP) data set. For the P300 data set (BCI competition III), for which a large number of trials is available, the sw-SVM proves to perform equivalently with respect to the ensemble SVM strategy that won the competition. For the ErrP data set, for which a small number of trials are available, the sw-SVM shows superior performances as compared to three state-of-the art approaches. Results suggest that the sw-SVM promises to be useful in event-related potentials classification, even with a small number of training trials.

  9. Does SW Monsoon Influence Total Suspended Matter Flux into the Arabian Sea?

    Digital Repository Service at National Institute of Oceanography (India)

    Raghavan, B.R.; Chauhan, O.S.

    Seasonal enhancement in the flux of total suspended matter (TSM) has been attributed to climatology of the SW monsoon (SWM) in time-series trap experiments conducted in the Arabian Sea. To determine the influence of climate on TSM flux, synoptic...

  10. Enhanced production of poly glutamic acid by Bacillus sp. SW1-2 ...

    African Journals Online (AJOL)

    Bacillus sp. SW1-2 producing poly glutamic acid (PGA), locally isolated from Eastern province in Saudi Arabia, was characterized and identified based on 16S rRNA gene sequencing. Phylogenetic analysis revealed its closeness to Bacillus megaterium. The homopolymer consists mainly of glutamic as indicated in the ...

  11. Geochemistry of calcareous sediments from the SW Carlsberg Ridge: Evidence for deeper carbonate compensation depth

    Digital Repository Service at National Institute of Oceanography (India)

    Valsangkar, A.B.; Ambre, N.V.

    Concentration of Mn, Fe, Ni, Co, Zn, Ca, Mg, K, Al, Si, Ti, P and CaCO sub(3) show wide range for the calcareous sediments from SW Carlsberg Ridge (CR). Compared with the average pelagic clays, the CR sediments are enriched by Mg, Ni, Co, and Zn...

  12. Nitrogen Dynamics in the Westerschelde Estuary (Sw Netherlands) Estimated by Means of the Ecosystem Model Moses

    NARCIS (Netherlands)

    Soetaert, K.E.R.; Herman, P.M.J.

    1995-01-01

    A tentative nitrogen budget for the Westerschelde (SW Netherlands) is constructed by means of a simulation model with thirteen spatial compartments. Biochemical and chemical processes in the water column are dynamically modeled; fluxes of dissolved constituents across the water-bottom interface are

  13. Contrasting styles of Sn-W mineralisation in peninsular Thailand and SW England

    Science.gov (United States)

    Manning, D. A. C.

    1986-01-01

    The Sn-W deposits of SW England and SE Asia are associated with crustally derived granitic rocks with late volatile-enriched (F, Li, B, P) differentiates. In peninsular Thailand, primary ores are principally pegmatitic, and hydrothermal vein systems are only locally important. In SW England, wolframite and cassiterite mainly occur in hydrothermal vein systems, and are associated with greisening and tourmalinisation; mineralised pegmatites are rare. These two styles of mineralisation are thought to arise because of differences in the character of late magmatic processes. In peninsular Thailand, late-stage tourmaline-bearing granitic rocks are enriched in B, but not Li and F, compared to earlier biotite granites. Similar late-stage granitic rocks occur also in SW England, but a later topaz granite, enriched in F, Li and P, also occurs. The Thai pegmatitic Sn-W deposits are thought to have formed by late magmatic crystallisation from an aqueous phase enriched in metals and derived by exsolution from a B and metal-rich magma, whereas the SW England mineralisation involved essentially post-magmatic hydrothermal processes. Complexing agents (especially F) and metals may have been derived from granitic or country rocks during hydrothermal circulation at the current level of emplacement.

  14. Larger foraminifera distribution on a mesotrophic carbonate shelf in SW Sulawesi (Indonesia)

    NARCIS (Netherlands)

    Renema, W.; Troelstra, S.R.

    2001-01-01

    Larger symbiont bearing foraminifera typically live in shallow tropical seas. In this study the fauna composition of patch reefs scattered over the Spermonde Shelf (SW Sulawesi, Indonesia), a mesotrophic carbonate shelf, is examined. The foraminiferal fauna of the Spermonde Shelf is characterised by

  15. Monitoring the potential introduction of the Swedish Chlamydia trachomatis variant (swCT) in the Netherlands

    NARCIS (Netherlands)

    Morré, S. A.; Catsburg, A.; de Boer, M.; Spaargaren, J.; de Vries, H. J. C.; Schirm, J.; Savelkoul, P. H. M.; van Steenbergen, J.; Swaan, C.

    2007-01-01

    This report describes the actions of public health experts in cooperation with specialists in sexually transmitted diseases (STD), epidemiologists and (molecular) microbiologists to investigate the possible introduction of the swCT variant in the Netherlands: 1. Investigating trends in CT

  16. Lateglacial and early Holocene tephrostratigraphy and sedimentology of the Store Slotseng basin, SW Denmark

    DEFF Research Database (Denmark)

    Larsen, Jeppe Joel; Noe-Nygaard, Nanna

    2014-01-01

    The history of the Lateglacial and Preboreal sedimentary succession from the Store Slotseng kettle hole basin, SW Denmark is presented. A tephrostratigraphical and multi-proxy investigation of the sediments, including stable isotope geochemistry, reveals small- and large-scale changes in the surr...

  17. Keurmerk voor sociaal aannamebeleid. Prestatieladder Socialer Ondernemer ook bruikbaar voor SW

    NARCIS (Netherlands)

    Smit, A.

    2012-01-01

    De Prestatieladder Socialer Ondernemen (PSO) geeft bedrijven die meer dan gemiddeld bijdragen aan werkgelegenheid voor personen met een afstand tot de arbeidsmarkt een erkenning. De PSO is 14 juni gelanceerd door TNO en ontwikkeld in samenwerking met onder andere zeven SW-bedrijven.ln dit artikeì de

  18. Properties of cast films made of chayote (Sechium edule Sw.) tuber starch reinforced with cellulose nanocrystals

    Science.gov (United States)

    In this study, cellulose (C) and cellulose nanocrystals (CN) were blended with chayote tuber (Sechium edule Sw.) starch (CS) in formulations cast into films. The films were conditioned at different storage temperatures and relative humidity (RH), and analyzed by mechanical tests, X-ray diffraction, ...

  19. Supporting document for the SW Quadrant Historical Tank Content Estimate for U-Tank Farm

    International Nuclear Information System (INIS)

    Brevick, C.H.; Gaddis, L.A.; Johnson, E.D.

    1994-06-01

    This Supporting Document provides historical characterization information gathered on U-Tank Farm, such as historical waste transfer and level data, tank physical information, temperature data, sampling data, and drywell and liquid observation well data for Historical Tank Content Estimate of the SW Quadrant at the Hanford 200 West Area

  20. Supporting Document for the SW Quadrant Historical Tank Content Estimate for SX-Tank Farm

    International Nuclear Information System (INIS)

    Brevick, C.H.; Gaddis, L.A.; Johnson, E.D.

    1994-06-01

    This Supporting Document provides historical characterization information gathered on SX-Tank Farm, such as historical waste transfer and level data, tank physical information, temperature data, sampling data, and drywell and liquid observation well data for Historical Tank Content Estimate of the SW Quadrant at the Hanford 200 West Area

  1. Anticuerpos frente a virus West nile y otros virus transmitidos por artropodos en la poblacion del Delta del Ebro

    Directory of Open Access Journals (Sweden)

    Lozano Alvaro

    1998-01-01

    Full Text Available FUNDAMENTOS: El virus West Nile (VWN es un Flavivirus que se transmite al hombre a través de distintas especies de mosquitos y produce brotes y casos esporádicos de enfermedad en distintas regiones del Viejo Mundo, incluída la Cuenca Mediterránea. Las zonas húmedas europeas que acogen aves migratorias procedentes de África constituyen áreas de alto riesgo para esta infección, así como para otras infecciones víricas transmitidas por artrópodos. MÉTODOS: Con objeto de investigar la prevalencia de la infección por el VWN y otros virus de transmisión similar en la población humana del Delta del Ebro, se estudiaron 1037 muestras de suero, obtenidas en 10 localidades de la zona, para presencia de anticuerpos frente a VWN y otros 12 virus transmitidos por artrópodos (3 Alfavirus, 8 Flaviviridae y 1 Bunyaviridae mediante titulación por inhibición de la hemaglutinación (IHA. En algunos casos se estudió la presencia de IgM específica por IHA tras fraccionar el suero por centrifugación en gradientes de sacarosa. RESULTADOS: En total, se encontró reactividad significativa frente a alguno de los virus probados en 130 casos (12.5%; 4.1% frente a Alfavirus, 8.0% frente a Flaviviridae y 0.4% frente a Bunyaviridae. El análisis de los títulos de anticuerpos reveló porcentajes significativos de muestras con títulos elevados frente a antígenos de VWN y otros. La distribución de la seroprevalencia fue muy desigual, concentrándose fundamentalmente en 3 localidades del interior del Delta (Ampolla, San Jaime y Montells, donde la prevalencia de anticuerpos frente a Flaviviridae llegó a alcanzar el 30% y se observaron niveles residuales de IgM frente a VWN en algunos sueros. CONCLUSIONES: Estos resultados y los obtenidos previamente en otras regiones de la Península Ibérica sugieren que el VWN circula en la población humana de las zonas de riesgo y produce brotes epidémicos periódicos. Habida cuenta del alto porcentaje de

  2. Inmunogenicidad de la vacuna frente al virus de la hepatitis B en pacientes con enfermedad inflamatoria intestinal

    OpenAIRE

    Olsen Rodríguez, Renée

    2017-01-01

    La colitis ulcerosa (CU) y la enfermedad de Crohn (EC) son patologías que se denominan conjuntamente enfermedad inflamatoria intestinal (EII). Su patogenia es poco conocida, pero si se sabe que hay una respuesta inmune frente a estructuras del tubo digestivo. El tratamiento se basa es disminuir esta inmunogenicidad administrando corticoides, inmunosupresores o terapias biológicas. Todas estas circunstancias favorecen las infecciones y reactivaciones por el virus de la hepatitis B (VHB). La pr...

  3. Pensamiento crítico de los jóvenes ciudadanos frente a las noticias en Chile

    Directory of Open Access Journals (Sweden)

    2018-01-01

    Full Text Available Fortalecer el pensamiento crítico de ciudadanos frente a noticias de Internet representa un desafío educativo clave. Los jóvenes ciudadanos parecen vulnerables frente a noticias de mala calidad u orientaciones ideológicas poco explícitas. Desde la ciencia de datos se desarrollan técnicas informáticas y estadísticas para recopilar prensa digital en tiempo real y caracterizarla automáticamente. Sin embargo, existe poca investigación interdisciplinar para diseñar plataformas de exploración de datos al servicio de un proceso educativo de ciudadanía crítica. Este artículo investiga esa oportunidad, mediante un estudio de caso en Chile que analiza la capacidad crítica del alumnado frente a noticias de un hecho social relevante: la movilización social «No+AFP». A partir de cuatro tareas en línea ?realizadas por 75 estudiantes de secundaria, 55 estudiantes universitarios y 25 especialistas en comunicación? preguntamos en qué medida los jóvenes son capaces de calificar titulares de prensa y orientaciones ideológicas de medios de comunicación. Por otra parte, analizamos la influencia de la marca del medio y de la subjetividad que, frente al movimiento social «No+AFP», imprime cada participante al pensamiento crítico. Los resultados obtenidos destacan la relevancia del trabajo en grupo, la influencia de la marca del medio de prensa y la correlación entre tener una opinión definida y la capacidad crítica.

  4. Atividade antibacteriana do extrato bruto de Bacillus amyloliquefaciens frente a diferentes indicadores.

    Directory of Open Access Journals (Sweden)

    D. SCHULZ

    2008-10-01

    Full Text Available

    O presente estudo teve como objetivo obter um extrato bruto de Bacillus amyloliquefaciens, padronizado pela dosagem de proteínas, e quantificar sua atividade antibacteriana pelo halo de inibição do crescimento de Listeria monocytogenes NCTC 098630, Escherichia coli ATCC 25922, Salmonella typhimurium ATCC 14028, Staphylococcus aureus ATCC 25923, Enterococcus faecalis ATCC 29212 Enterobacter aerogenes ATCC 13048 e Pseudomonas aeruginosa ATCC 9027. O extrato bruto de Bacillus amyloliquefaciens somente apresentou atividade antibacteriana frente Listeria monocytogenes NCTC 098630. Constatou-se que a concentração responsável por 50% da máxima atividade antibacteriana foi 29,22 g do extrato bruto, com um halo de inibição de aproximadamente 4 mm.

  5. Resistência de estafilococos de origem canina, frente à drogas anti microbianas em Londrina, PR.

    Directory of Open Access Journals (Sweden)

    Amauri Alcindo Alfieri

    1985-11-01

    Full Text Available The sensitivity of 71 staphylococci (S. aureus and S. intermedius, isolated from dogs with signs of skin disease, to J1 chemotherapeutic agents was determined. Of the strains, 55(77,46% were resistant to amicacin, 29(40,84% to penicillin G, 26(36,61% to ampicillin, 24(33,80% to tetracycline, 15(21,13% to chloramphenicol, 12(16,90% to erytromycin, 11(15,49% to kanamycin, 8(11,27% to gentamycin, 5(7,04% to sulfazothrim, 2(2,82% to cefoxithin and 1(1,41% to oxacillin.Foram examinadas 71 cepas de estafilococos (S. aureus e S. intermedius isoladas a partir de cães com pioderma, frente a 11 substâncias antimicrobianas. Das cepas, 55(77,46% apresentaram resistência à amicacina, 29(40,84% à penicilina G, 26(36,61% à ampicilina, 24(33,80% à tetraciclina, 15(21,13% ao cloranfenicol, 12(16,90% à eritromicina, 11(15,49% à canamicina, 8(11,27% à gentamicina, 5(7,04% ao sulfazotrim, 2(2,82% à cefoxitina e 1(1,41% a oxacilina.

  6. Stress ou burnout, a realidade frente a inclusão

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    Maria Inês Naujorks

    2012-04-01

    Full Text Available Este trabalho visa estudar o stress que a proposta da escola inclusiva causa, pois ela tem um potencial inédito que precisa ser desvendado para que possamos iniciar um entendimento da complexidade não só da proposta, como também das reações individuais frente ao novo, ao desafio.. Fizeram parte deste estudo as escolas do ensino fundamental da rede pública de Santa Maria/RS, totalizando 91 escolas. Até o presente momento percebemos o processo de inclusão como gerador de situações difíceis nas relações escolares desencadeando um processo de desgaste institucional e pessoal; por parte das escolas : no que se refere a remoção de barreiras arquitetônicas, estudo do projeto politico-pedagógico, entre outros; por parte dos professores: por desconhecerem o que é o fenômeno da deficiência e seus desdobramentos na dinâmica em sala de aula.

  7. Percepción social y respuesta institucional frente al desastre de Tierradentro, Colombia

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    Laura Astrid Ramírez Elizalde

    2016-06-01

    Full Text Available En junio de 1994, un sismo sacudió el suroccidente de Colombia, el cual, sumado a las fuertes lluvias y a las condiciones geofísicas de la zona de Tierradentro, desencadenó una serie de avalanchas, generando un evento complejo que dejó más de mil muertos y una severa destrucción de viviendas y cultivos, cuyos afectados fueron, en su mayoría, indígenas nasa. Este artículo analiza, bajo un enfoque histórico y territorial, cómo se gestó la respuesta institucional frente al desastre de Tierradentro, y cómo esta respuesta se articuló con la percepción social del desastre que tuvo la comunidad afectada y los medios de comunicación. Para responder a esta pregunta se siguió una metodología que vinculó etnografía, cartografía social y revisión de archivo.

  8. Sujeto político, democracia y pueblo: Argentina y Bolivia frente al nuevo siglo

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    María Antonia Muñoz

    2016-01-01

    Full Text Available El retorno del sujeto político en América Latina durante los primeros años del siglo XXI ha sido acompañado por la rearticulación de lo popular con lo democrático. Mientras el imperio de la democracia liberal en la tercera ola de las democracias suponía el protagonismo de figuras individuales (como el votante y el ciudadano, esta cuarta se sostuvo también sobre otras lógicas colectivas (el derecho y la soberanía popular. En Argentina y Bolivia, los movimientos asociados a demandas laborales y acceso a recursos básicos (como alimentos, subsidios, agua y gas lograron dislocar la escena pública. Además, tuvieron éxito en plantear un litigio en torno al rol de la soberanía po - pular, cobrando identidad frente a un enemigo común. No obstante, mientras en un caso tuvieron capacidad de establecer un programa común en contra de un enemigo, en otro caso no pudieron hacerlo. Las estrategias de los sujetos políticos fueron diferentes. Para mostrar estas diferentes se recuperan, de manera crítica, autores ligados al posestructuralismo como Laclau, Rancière y Zizek.

  9. Valores e motivações para responder sem preconceito frente a homossexuais

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    Valdiney Veloso Gouveia

    2012-06-01

    Full Text Available Neste artigo se objetivou conhecer os correlatos valorativos das motivações interna e externa para encarar sem preconceito a homossexualidade. Foram realizados dois estudos. No Estudo 1 participaram 234 pessoas de João Pessoa, com idade média de 26 anos, que responderam à Escala de Motivações para Responder sem Precocietos Frente a Gays e ao Questionário dos Valores Básicos e perguntas demográficas. A motivação interna se correlacionou com as subfunções suprapessoal (+ e normativa (-, enquanto a motivação externa o fez com existência (+ e normativa (+. O Estudo 2 reuniu 202 pessoas da mesma população, com idade média de 25 anos. Elas responderam os mesmos instrumentos, tendo as lésbicas como grupo-alvo. As motivações interna e externa se correlacionaram com a subfunção normativa (- e +, respectivamente. Concluindo, os valores predisseram adequadamente as motivações para olhar sem preconceito a homossexualidade e os achados foram discutidos a partir do modelo dual de valores.

  10. Estrutura fatorial da escala de atitudes frente a relacionamentos afetivos estáveis

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    Taciano Lemos Milfont

    Full Text Available O presente estudo visa contribuir para a comprovação da estrutura fatorial da Escala de Atitudes Frente a Relacionamentos Afetivos Estáveis (RAE; Reis, 1995. Participaram da pesquisa 658 estudantes universitários com idade média 19,9 anos (DP=2,5. Análises fatoriais exploratórias e confirmatórias indicaram a existência de uma estrutura multidimensional. Os cinco fatores encontrados (Comprometimento, Edificação, Mutualidade, Envolvimento e Indulgência apresentaram índices de consistência interna satisfatórios (0,68<α<0,83, itens com saturações altas (0,46<λy<0,75 e significativas (p<0,05. Esta estrutura multidimensional apresentou melhores índices de bondade de ajuste (χ2/gl=3,07; GFI=0,91; CFI=0,97; RMSEA=0,056 e foi estatisticamente superior [Δχ2(111=676,69, p<0,001] à estrutura unidimensional. Resultados de correlações com as auto-imagens independente e interdependente (Singelis, 1994, com os valores humanos básicos (Gouveia, 2003, além de diferenças quanto ao sexo, confirmam a validade dos cinco novos fatores.

  11. Escala de atitude frente à fofoca: evidências de validade e confiabildade

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    Valdiney V. Gouveia

    Full Text Available A fofoca é um elemento comum nas conversas cotidianas tanto de adultos quanto de crianças, está presente em todas as culturas e explica diversos comportamentos sociais. Portanto, considerando a relevância desse construto e a ausência de medida específica no contexto brasileiro, decidiu-se adaptar a Escala de Atitudes frente à Fofoca (EAFF para, especificamente, conhecer evidências de sua validade fatorial e de sua consistência interna. O instrumento é formado por 12 itens, respondidos em escala de 5 pontos, e mede dois fatores: valor moral e valor social da fofoca. Participaram da pesquisa 261 estudantes universitários de instituições públicas e privadas de João Pessoa (PB, com idade média de 26 anos, sendo a maioria do sexo feminino (71,6%. Por meio de análises fatoriais confirmatórias, foram testados dois modelos: (1 unifatorial (alternativo e (2 bifatorial (modelo original. Os resultados mostraram que o modelo bifatorial apresentou os melhores indicadores de ajuste, com índices de confiabilidade (Alfa de Cronbach aceitáveis para fins de pesquisa.

  12. Indigenismo frente al racismo, cuestiones de ética en un marco museológico

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    Whitney Dennis

    2013-10-01

    Full Text Available Este trabajo tiene como propósito examinar  funciones y responsabilidades  un museo etnológico en un país en  de desarrollo. Planteo la idea de que  museo  es tratado de forma  en un país en desarrollo frente  un país desarrollado, y éticas las razones por las cuales se  tales diferencias entre unos y . Como marco utilizado un museo etnológico de   Dominicana por la compleja  que este país presenta, hasta  día de hoy, en asuntos de identidad,  por el modo como dichos asuntos son  o  dentro del  museológico. Puede decirse que  una gran polémica sobre la verdadera  de los dominicanos  causa de diversos  de carácter , histórico y político que  han llevado a negar sus raíces africanas  a expresar un profundo desprecio  la negritud.

  13. Geoingeniería, apuesta incierta frente al cambio climático

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    Gian Carlo Delgado Ramos

    2012-01-01

    Full Text Available Ante el acelerado aumento de la concentración de gases de efecto invernadero, producto de un metabolismo social creciente (uso de energía y materiales, se ha propuesto, como potencial solución, la puesta en marcha de diversas tecnologías, entre ellas aquellas diseñadas para manipular y controlar el clima. El presente texto revisa el metabolismo social imperante y sus proyecciones para las próximas décadas, para desde ahí presentar la problemática y el reto del cambio climático, sus implicaciones y las soluciones tecnológicas de manipulación del clima propuestas desde un discurso político que aboga por una "economía verde". A partir de describir las geoingenierías propuestas, se revisa críticamente su complejidad, viabilidad, incertidumbres y potenciales implicaciones. Reconociendo que el uso de las geoingenierias es más un asunto económico-político que técnico, se concluye con un llamado a abrir el debate sobre las implicaciones y deseabilidad de tales o cuales geoingenierías, partiendo de la premisa de que la principal medida frente al cambio climático es la efectiva reducción del metabolismo social y por tanto de las emisiones.

  14. EL PLAN GLOBAL FRENTE AL RIESGO DE INUNDACIÓN EN LA RIBERA DEL JÚCAR

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    Gemma Barber Arlandis

    2012-01-01

    Full Text Available El Plan Global del Júcar frente al riesgo de inundación pretende minimizar los daños causados por las avenidas que periódicamente afectan a la Ribera del Júcar. En el presente artículo se describen y analizan las actuaciones de este Plan, la génesis del mismo, el proceso de elaboración y sus resultados. La problemática es compleja, ya que el riesgo de inundación abarca un territorio muy poblado, con un importante desarrollo industrial y agrícola. Además, la existencia de espacios naturales de elevado valor ambiental, hace que las intervenciones derivadas del Plan consideren al mismo nivel la defensa frente a avenidas y las demandas sociales y ambientales, tras el consenso alcanzado en un proceso de participación pública. El Plan incorpora aspectos innovadores en ingeniería hidráulica, cuyo resultado es una actuación integrada y sostenible, que compatibiliza la protección frente a avenidas con la recuperación y mejora del ámbito fluvial, y su función como corredor vertebrador del territorio.

  15. The Legionella pneumophila IcmSW complex interacts with multiple Dot/Icm effectors to facilitate type IV translocation.

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    Eric D Cambronne

    2007-12-01

    Full Text Available Many gram-negative pathogens use a type IV secretion system (T4SS to deliver effector proteins into eukaryotic host cells. The fidelity of protein translocation depends on the efficient recognition of effector proteins by the T4SS. Legionella pneumophila delivers a large number of effector proteins into eukaryotic cells using the Dot/Icm T4SS. How the Dot/Icm system is able to recognize and control the delivery of effectors is poorly understood. Recent studies suggest that the IcmS and IcmW proteins interact to form a stable complex that facilitates translocation of effector proteins by the Dot/Icm system by an unknown mechanism. Here we demonstrate that the IcmSW complex is necessary for the productive translocation of multiple Dot/Icm effector proteins. Effector proteins that were able to bind IcmSW in vitro required icmS and icmW for efficient translocation into eukaryotic cells during L. pneumophila infection. We identified regions in the effector protein SidG involved in icmSW-dependent translocation. Although the full-length SidG protein was translocated by an icmSW-dependent mechanism, deletion of amino terminal regions in the SidG protein resulted in icmSW-independent translocation, indicating that the IcmSW complex is not contributing directly to recognition of effector proteins by the Dot/Icm system. Biochemical and genetic studies showed that the IcmSW complex interacts with a central region of the SidG protein. The IcmSW interaction resulted in a conformational change in the SidG protein as determined by differences in protease sensitivity in vitro. These data suggest that IcmSW binding to effectors could enhance effector protein delivery by mediating a conformational change that facilitates T4SS recognition of a translocation domain located in the carboxyl region of the effector protein.

  16. Percepciones de los ciudadanos de Barranquilla (Colombia frente al gobierno electrónico

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    Carlos Arcila Calderón

    2013-11-01

    Full Text Available El Gobierno Electrónico (GE es un instrumento de cambio social importante en la sociedad actual. El objetivo del presente estudio es conocer cuáles son las percepciones (expectativas y experiencias de los ciudadanos de Barranquilla frente al GE. Se utilizó la encuesta como técnica de recolección de datos y la investigación se desarrolló en dos etapas: una exploratoria con una muestra aleatoria de ciudadanos de Barranquilla (n= 345 y otra descriptiva con una muestra focalizada de jóvenes estudiantes (n=180 de la Universidad del Norte. Los resultados de ambas encuestas muestran un bajo conocimiento de las plataformas de GE y que quienes la conocían tenían dificultades en definirlas. Encontramos que el GE está más vinculado a la búsqueda de información, para la que se tiene una percepción positiva del diseño e interface, que a la participación e interacción efectiva. Adicionalmente, encontramos que existe una relación significativa entre la edad y el uso y confianza del GE: los mayores tienden más a usarla, pero los menores las valoran mejor. La investigación concluye y recomienda que la investigación futura sobre el tema ahonde sobre los aspectos sociales y esté centrada en los ciudadanos, más que en los aspectos meramente técnicos.

  17. PERCEPCIONES DE LOS CIUDADANOS DE BARRANQUILLA (COLOMBIA FRENTE AL GOBIERNO ELECTRÓNICO

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    Carlos Arcila Calderón

    2014-01-01

    Full Text Available El Gobierno Electrónico ( GE es un instrumento de cambio social importante en la sociedad actual. El objetivo del presente estudio es conocer cuáles son las percepciones (expectativas y experiencias de los ciudadanos de Barranquilla frente al GE . Se utilizó la encuesta como técnica de recolección de datos y la investigación se desarrolló en dos etapas: una exploratoria con una muestra aleatoria de ciudadanos de Barranquilla (n= 345 y otra descriptiva con una muestra focalizada de jóvenes estudiantes (n=180 de la Universidad del Norte. Los resultados de ambas encuestas muestran un bajo conocimiento de las plataformas de GE y que quienes la conocían tenían dificultades en definirlas. Encontramos que el GE está más vinculado a la bús - queda de información, para la que se tiene una percepción positiva del diseño e interface, que a la participación e interacción efectiva. Adicionalmente, encontramos que existe una relación significativa entre la edad y el uso y confianza del GE : los mayores tienden más a usarla, pero los menores las valoran mejor. La investigación concluye y recomienda que la investigación futura sobre el tema ahonde sobre los aspectos sociales y esté centrada en los ciudadanos, más que en los aspectos meramente técnicos.

  18. EFECTO DE Tropaeolum tuberosum FRENTE A LA HIPERPLASIA PROSTÁTICA BENIGNA INDUCIDA EN RATAS HOLTZMAN

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    Gioliana Aire-Artezano

    2013-01-01

    Full Text Available Objetivo: Evaluar el efecto de Tropaeolum tuberosum(mashua frente a la Hiperplasia Prostática Benigna (HPB y compararlo con finasterida. Métodos: Estudio experimental completo. Se emplearon 30 ratas Holtzman macho de 12 semanas de edad, aleatorizadas y divididas en seis gru- pos: grupo blanco; grupo testosterona; grupo finasterida (0.33mg/kg/rata; y tres grupos dosis, dosis 1 (300mg/kg/rata, dosis 2 (500mg/kg/rata y dosis 3 (800mg/kg/rata tratados con Tropaeolum tuberosum. Se realizó una medición basal del volumen prostático mediante una ecografía transabdominal. La inducción de HPB se realizó con enantato de testosterona (0,083mg/Kg/rata en los grupos dosis, finasterida y testosterona, el día uno y siete. Paralelamente, se administró liofilizado de Tropaeolum tuberosum y finasterida durante 21 días. Para el diagnóstico, se realiza- ron estudios por imágenes, anatomopatológicos e histopatológicos. Resultados: El estudio por imágenes, en relación al incremento del volumen prostático,no arrojó diferencia significativa entre dosis 2 y finasterida; mientras que en relación con la ecogenicidad, dosis 3 presentó similitud cualitativa al finasterida. En el estudio anatomopatológico, no hubo diferencia significativa entre el grupo dosis 3 y el grupo finasterida. Histo- patológicamente, dosis 3 se asemejó cuantitativamente al finasterida. Conclusiones: Se evidenció disminución de la HPB histológicamente y en el estudio por imágenes; sin embargo, ninguna de las dosis mostró efecto superior al finasterida.

  19. Comportamiento frente a la corrosión del material compuesto 2124/SiC

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    López-Caballero, J. A.

    2005-12-01

    Full Text Available A comparative study was performed on the corrosion behaviour of an aluminium matrix composite reinforced with silicon carbide particles, obtained by powder metallurgic. The 2124/SiC material was heat treated using T4 and T6 procedures. The T6 heat treatment induced the formation of several intermetallics and reducing the corrosion resistance. The silicon carbide particles did not have a cathodic behaviour as compared with the aluminium matrix. However, these particles produced a diminution in the corrosion resistance due to the formation of more active zones in the matrix/reinforced interface. These ceramic particles caused intermetallic precipitation and deformation originating in the surrounding zones localized corrosion.

    Se realiza un estudio comparativo del comportamiento frente a la corrosión de la aleación de aluminio 2124 reforzada con partículas de carburo de silicio, obtenida por pulvimetalurgia y con tratamientos térmicos T4 y T6. Los resultados experimentales muestran que el tratamiento térmico T6 induce la formación de numerosos intermetálicos que reducen la resistencia a la corrosión. Las partículas de carburo de silicio no tienen un comportamiento catódico con respecto a la matriz de aluminio, sin embargo, disminuyen la resistencia a la corrosión, ya que generan zonas más activas en la interfase matriz/ refuerzo, debido a la acumulación de dislocaciones, tensiones residuales y a la precipitación de intermetálicos.

  20. Responsabilidad frente al cliente externo como elemento competitivo del sector metalmecánico

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    Juliana Ferrer Soto

    2003-01-01

    Full Text Available El presente artículo aborda una relación entre la responsabilidad y las dimensiones de competitividad expresadas en requerimientos del cliente, información técnica, especificaciones exigidas, asistencia técnica, atención oportuna, entre otros; evidenciando como esta categoría permite fortalecer los cimientos, en el manejo de factores competitivos de las organizaciones, bajo espacios de mercados representados en el estudio, por la empresa metalmecánica zuliana. Siendo una investigación descriptiva, de campo, para el levantamiento de la información se adoptó un muestreo aleatorio estratificado, sobre la base del tamaño de las empresas, utilizando afijación proporcional. La muestra resultó de cuarenta y cinco (45 empresas, de las cuales veintitrés (23 son pequeñas, trece (13 son medianas y nueve (9 son grandes. Del conjunto de resultados, puede inferirse que existe una correlación positiva, dado que en la medida que aumenta el tamaño, aumenta la presencia de dimensiones competitivas, y a la vez se evidencia el cumplimiento del rasgo responsabilidad; presentando así, una correlación significativa global desde el punto de vista estadístico de 0,708. Se concluye, como en la medida en que aumenta el tamaño de la empresa se van generando elementos de confianza y credibilidad resultado de la responsabilidad de la empresa, frente a clientes internos y externos, convirtiendo tal fortaleza en una ventaja competitiva que expresa el posicionamiento en el mercado de consumidores.

  1. Aptitud cardiorrespiratoria y adiposidad frente al nivel de actividad física

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    Carlos Alberto Ramos Parrací

    2017-06-01

    Full Text Available Con el objetivo de determinar el comportamiento de la Aptitud Cardiorrespiratoria y la adiposidad frente al nivel de actividad física de la población adulta de la ciudad de Neiva, se evaluaron 972 sujetos entre 18 a 75 años de edad. Estudio Descriptivo Correlacional. Los datos se analizaron en SPSS-23 e InfoStat/Profesional 1,2. La metodología partió de la descripción de variables, posteriormente el grado de asociación entre ellas (coeficiente de correlación de Pearson, los grupos conformados se compararon (Prueba ANOVA y comparación multiple LSD Fisher; por último, se estableció el grado de agrupamiento entre las variables (Prueba Average Linkage. Los resultados evidenciaron diferencias significativas en índice de masa corporal (IMC, Frecuencia Cardiaca Reposo (FCR y Consumo Máximo de Oxigeno (VO2máx., entre activos e inactivos; asociación del 5%, entre el IMC con FCR y VO2máx, índice cintura–cadera (ICC y porcentaje grasa corporal (%GC; del ICC con %GC, VO2máx, Tensión Arterial Sistólica (TAS y Diastólica (TAD; del %GC con FCR, TAD y VO2máx; la FCR con VO2máx; la TAS con TAD y VO2máx rechazando la hipótesis de independencia. Concluyendo que los indicadores de adiposidad y aptitud cardiorrespiratoria evidencian la combinación de factores de riesgo de enfermedades de índole hipocinético en la población.

  2. La virtualidad en procesos educativos frente a retos sociales: El analfabetismo

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    María Mercedes Sinisterra Díaz

    2005-01-01

    Full Text Available La nueva sociedad del conocimiento cuenta con escenarios que flexibilizan el proceso de aprendizaje, posibilitando de esta manera la superación de barreras de accesibilidad a la información. Desde la aparición de la Universidad Abierta y a Distancia, las diversas formas de comunicarnos y de generar conocimiento han permitido que los otrora monopolios del proceso enseñanza-aprendizaje, la institución escolar y el libro, estén siendo desplazados por entornos virtuales, entendidos éstos como, "espacios de interacción que no exigen la presencia física de los actores" los cuales, facilitan la libertad de aprender a través del hipertexto, videoconferencias, video-juegos, enciclopedias multimedia, realidad virtual que nos sitúan frente a una nueva corriente en la educación. Entornos Virtuales que aunque potencializan el proceso enseñanza-aprendizaje, en la actualidad no han sido debidamente explotados por el sistema educativo del Estado. Mientras, el sector privado, consciente de las ventajas que estos espacios representan dentro de su dinámica económica los han visionado dentro en sus modelos y/o estrategias de negocio. Es por ello, que en este documento se presentan diferentes opciones en cuanto a los Sistemas de información y Tecnologías de Información que pueden ser adoptados en procesos educativos en los sectores socialmente marginados en dicho sector.

  3. ESTABILIDAD DE ANTOCIANINAS EN JUGO Y CONCENTRADO DE AGRAZ (VACCINIUM MERIDIONALE SW. STABILITY OF ANTHOCYANINS IN JUICE AND CONCENTRATE OF AGRAZ(VACCINIUM MERIDIONALE SW.

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    José Jobanny Martínez Zambrano

    2011-06-01

    Full Text Available Se estudió la cinética de la estabilidad térmica y de almacenamiento de las antocianinas en jugo y concentrado de agraz (Vaccinium meridionale Sw. siguiendo una cinética de primer orden. La degradación de las antocianinas con la temperatura fue modelada adecuadamente con la ecuación de Arrhenius. El efecto del pH en la estabilidad térmica de las antocianinas en los concentrados de agraz se estudió a seis diferentes valores (3,0 - 8,0 en buffer citrato-fosfato. La degradación de las antocianinas fue mayor para el jugo que para el concentrado. Una disminución significante en la estabilidad de las antocianinas del concentrado se observó a pH cercano a 5,0.The kinetics of thermal and storage stabilities of anthocyanins in agraz (Vaccinium meridionale Sw. juice and concentrate were studied with first-order reaction kinetics. The temperature-dependent degradation was adequately modeled on the Arrhenius equation. The effect of pH on thermal stability of anthocyanins in concentrate of agraz was studied at six different pHs (3.0 - 8.0 in citrate-phosphate buffer solutions. The results indicated that anthocyanins degradation was higher in juice than concentrate. A significant decrease in anthocyanin stability was observed at pHs above 5.0.

  4. Strategies to improve performance od SW-SAGD (Single Well-Steam Assisted Gravity Drainage); Estrategias para melhor desempenho do SW-SAGD

    Energy Technology Data Exchange (ETDEWEB)

    Moreira, Richard Douglas Ribeiro [Norse Energy do Brasil S/A, Rio de Janeiro, RJ (Brazil); Trevisan, Osvair Vidal [Universidade Estadual de Campinas (UNICAMP), SP (Brazil)

    2008-07-01

    The present work presents an extensive numerical study, using a commercial reservoir simulator, on the recovery of heavy oil by steam injection assisted by gravity drainage in single horizontal wells. The goal is to study several strategies to improve performance of the Single Well - Steam Assisted Drainage Gravity (SW-SAGD), a new but promising thermal recovery technique aimed at exploitation of heavy oils. The strategies are basically made up of two measures: cyclic steam injection prior to the main injection-production process; and well bore splitting into injection and production zones by packer settings. The measures are scrutinized when used separately or together. Cyclic injection is varied according to cycle duration. Comparisons are made between the performance of oil recovery for the developed strategies and the performance of the traditional dual well SAGD technique with similar operating parameters and field conditions. The results point out the best strategy regarding key parameters such as the oil recovery factor and the steam oil ratio. Results were also verified for variations of rock and fluid properties in the range of a typical heavy oil reservoir. As a result, a new strategy for the SW-SAGD process is presented, providing oil recovery, which is higher than that yielded by the equivalent DW-SAGD. (author)

  5. Atitudes frente às próteses auditivas Attitudes towards hearing aids

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    Bárbara Guimarães Bastos

    2009-01-01

    Full Text Available OBJETIVOS: avaliar as atitudes frente à deficiência auditiva e o aparelho de amplificação sonora individual (AASI em candidatos e usuários destes dispositivos. Verificar se existe relação entre tais atitudes e os dados demográficos, audiométricos e características do AASI. MÉTODOS: 63 indivíduos (35 homens e 28 mulheres, idade média de 64,3 anos com deficiência auditiva neurossensorial bilateral de diferentes graus, candidatos e usuários de AASI responderam o "Questionário de Atitudes Frente à Deficiência Auditiva" (ALHQ v3.0. Foi analisada a distribuição da pontuação das subescalas do ALHQ e realizada a correlação entre estas e os dados demográficos, audiológicos e da adaptação do AASI dos participantes. Foram também realizadas comparações da pontuação do ALHQ entre os grupos de candidatos e usuários, entre homens e mulheres. RESULTADOS: não houve distribuição normal das respostas nas subescalas do ALHQ. Não houve correlações entre a pontuação do ALHQ com os dados demográficos e audiológicos. Foram verificadas correlações fracas e significativas entre as subescalas do questionário: "estratégias negativas" e "estima" (rho=-0,39, "negação" e "estima" (rho=-0,27, "estratégias negativas" e "associações negativas" (rho=0,25 e "negação" e "estratégias negativas" (rho=-0,30. Houve diferença significativa nas subescalas estratégias negativas (p=0,02 e associações negativas (p=0,00 entre o grupo de candidatos e usuários. Não houve diferença na pontuação entre homens e mulheres. CONCLUSÃO: a existência de atitudes negativas frente à deficiência auditiva e ao uso do AASI reforça a necessidade do aconselhamento de ajuste pessoal incluído no processo de adaptação do AASI em adultos e idosos. É necessário validar o questionário traduzido para o português brasileiro.PURPOSE: to evaluate the attitudes towards hearing loss and hearing aids in a group of hearing aid candidates and users

  6. Conhecimento dos Enfermeiros frente ao abuso sexual Conocimiento de los enfermeros frente al abuso sexual Knowledge of Nurses when Faced with Sexual Abuse

    Directory of Open Access Journals (Sweden)

    Janaina Amorim de Ávila*

    2012-07-01

    Full Text Available Objetivo: Este estudo objetivou conhecer a prática profissional dos enfermeiros de cinco Unidades Básicas de Saúde da família de um município do extremo sul do Brasil, quanto ao abuso sexual com crianças e adolescentes. Metodologia: Trata-se de um estudo qualitativo, desenvolvido com sete enfermeiras pertencentes às sete equipes da Estratégia de Saúde da Família, cujos dados foram coletados entre os meses de março e abril de 2009, por meio de entrevista semiestruturada, enfocando o conhecimento acerca da intervenção ante a suspeita de abuso sexual na infância e na adolescência e a percepção das enfermeiras sobre a assistência prestada às vítimas de abuso sexual e a sua família. Resultados e discussão: Mediante a análise temática dos dados, os resultados apontam que os profissionais se sentem despreparados, desprotegidos e decepcionados com relação às medidas tomadas para confirmar ou não os casos de suspeita de abuso sexual. Ressalta-se também que não há um protocolo de atendimento às vítimas que dá respaldo aos profissionais, o que dificulta o atendimento a essa clientela. Conclusão: Destaca-se a necessidade de cursos de capacitação que forneçam esclarecimentos de como manejar a problemática, envolvendo todos os profissionais que trabalham com essa realidade.Objetivo: Este estudio indagó sobre la práctica profesional de los enfermeros en cinco Unidades Básicas de Salud de la familia en una ciudad del extremo sur de Brasil, con el abuso sexual con niños y adolescentes. Metodología: Se realizó un estudio cualitativo, desarrollado con siete enfermeras pertenecientes a las siete equipes de la Estrategia de Salud de la Familia, cuyos datos fueran recolectados entre los meses de marzo y abril de 2009, a través de entrevista semi-estructurada, centrado en el conocimiento acerca de la intervención frente a sospecha de abuso sexual en la infancia y en la adolescencia y la percepción de las enfermeras sobre

  7. On the SW Sex-type eclipsing cataclysmic variable SDSS0756+0858

    Energy Technology Data Exchange (ETDEWEB)

    Tovmassian, Gagik; Hernandez, Mercedes Stephania; González-Buitrago, Diego; Zharikov, Sergey; García-Díaz, Maria Teresa, E-mail: gag@astro.unam.mx [Instituto de Astronomía, Universidad Nacional Autonoma de México, Apdo. Postal 877, Ensenada, Baja California 22800 (Mexico)

    2014-03-01

    We conducted a spectroscopic and photometric study of SDSS J075653.11+085831. X-ray observations were also attempted. We determined the orbital period of this binary system to be 3.29 hr. It is a deep eclipsing system, whose spectra show mostly single-peaked, Balmer emission lines and a rather intense He II line. There is also the presence of faint (often double-peaked) He I emission lines as well as several absorption lines, Mg I being the most prominent. All of these features point toward the affiliation of this object with the growing number of SW Sex-type objects. We developed a phenomenological model of an SW Sex system to reproduce the observed photometric and spectral features.

  8. On the SW Sex-type eclipsing cataclysmic variable SDSS0756+0858

    International Nuclear Information System (INIS)

    Tovmassian, Gagik; Hernandez, Mercedes Stephania; González-Buitrago, Diego; Zharikov, Sergey; García-Díaz, Maria Teresa

    2014-01-01

    We conducted a spectroscopic and photometric study of SDSS J075653.11+085831. X-ray observations were also attempted. We determined the orbital period of this binary system to be 3.29 hr. It is a deep eclipsing system, whose spectra show mostly single-peaked, Balmer emission lines and a rather intense He II line. There is also the presence of faint (often double-peaked) He I emission lines as well as several absorption lines, Mg I being the most prominent. All of these features point toward the affiliation of this object with the growing number of SW Sex-type objects. We developed a phenomenological model of an SW Sex system to reproduce the observed photometric and spectral features.

  9. swLORETA: a novel approach to robust source localization and synchronization tomography

    International Nuclear Information System (INIS)

    Palmero-Soler, Ernesto; Dolan, Kevin; Hadamschek, Volker; Tass, Peter A

    2007-01-01

    Standardized low-resolution brain electromagnetic tomography (sLORETA) is a widely used technique for source localization. However, this technique still has some limitations, especially under realistic noisy conditions and in the case of deep sources. To overcome these problems, we present here swLORETA, an improved version of sLORETA, obtained by incorporating a singular value decomposition-based lead field weighting. We show that the precision of the source localization can further be improved by a tomographic phase synchronization analysis based on swLORETA. The phase synchronization analysis turns out to be superior to a standard linear coherence analysis, since the latter cannot distinguish between real phase locking and signal mixing

  10. Coastal urbanization leads to remarkable seaweed species loss and community shifts along the SW Atlantic.

    Science.gov (United States)

    Scherner, Fernando; Horta, Paulo Antunes; de Oliveira, Eurico Cabral; Simonassi, José Carlos; Hall-Spencer, Jason M; Chow, Fungyi; Nunes, José Marcos C; Pereira, Sonia Maria Barreto

    2013-11-15

    Coastal urbanization is rapidly expanding worldwide while its impacts on seaweed communities remain poorly understood. We assessed the impact of urbanization along an extensive latitudinal gradient encompassing three phycogeographical regions in the SW Atlantic. Human population density, number of dwellings, and terrestrial vegetation cover were determined for each survey area and correlated with diversity indices calculated from seaweed percent cover data. Urban areas had significantly lower calcareous algal cover (-38%), and there was significantly less carbonate in the sediment off urban areas than off reference areas. Seaweed richness averaged 26% less in urban areas than in areas with higher vegetation cover. We observed a remarkable decline in Phaeophyceae and a substantial increase of Chlorophyta in urban areas across a wide latitudinal gradient. Our data show that coastal urbanization is causing substantial loss of seaweed biodiversity in the SW Atlantic, and is considerably changing seaweed assemblages. Copyright © 2013 Elsevier Ltd. All rights reserved.

  11. Adaptation of SW-846 methodology for the organic analysis of radioactive mixed wastes

    International Nuclear Information System (INIS)

    Griest, W.H.; Schenley, R.L.; Tomkins, B.A.; Caton, J.E. Jr.; Fleming, G.S.; Harmon, S.H.; Wachter, L.J.; Garcia, M.E.; Edwards, M.D.

    1990-01-01

    Modifications to SW-846 sample preparation methodology permit the organic analysis of radioactive mixed waste with minimum personal radiation exposure and equipment contamination. This paper describes modifications to SW-846 methods 5030 and 3510-3550 for sample preparation in radiation-zoned facilities (hood, glove box, and hot cell) and GC-MS analysis of the decontaminated organic extracts in a conventional laboratory for volatile and semivolatile organics by methods 8240 and 8270 (respectively). Results will be presented from the analysis of nearly 70 nuclear waste storage tank liquids and 17 sludges. Regulatory organics do not account for the organic matter suggested to be present by total organic carbon measurements. 7 refs., 5 tabs

  12. 5-Geranyloxy-7-methoxycoumarin inhibits colon cancer (SW480) cells growth by inducing apoptosis.

    Science.gov (United States)

    Patil, Jaiprakash R; Jayaprakasha, Guddadarangavvanahally K; Kim, Jinhee; Murthy, Kotamballi N Chidambara; Chetti, Mahadev B; Nam, Sang-Yong; Patil, Bhimanagouda S

    2013-03-01

    For the first time, three coumarins were isolated from the hexane extract of limes (Citrus aurantifolia) and purified by flash chromatography. The structures were identified by NMR (1D, 2D) and mass spectral analyses as 5-geranyloxy-7-methoxycoumarin, limettin, and isopimpinellin. These compounds inhibited human colon cancer (SW-480) cell proliferation, with 5-geranyloxy-7-methoxycoumarin showing the highest inhibition activity (67 %) at 25 µM. Suppression of SW480 cell proliferation by 5-geranyloxy-7-methoxycoumarin was associated with induction of apoptosis, as evidenced by annexin V staining and DNA fragmentation. In addition, 5-geranyloxy-7-methoxycoumarin arrested cells at the G0/G1 phase, and induction of apoptosis was demonstrated through the activation of tumour suppressor gene p53, caspase8/3, regulation of Bcl2, and inhibition of p38 MAPK phosphorylation. These findings suggest that 5-geranyloxy-7-methoxycoumarin has potential as a cancer preventive agent. Georg Thieme Verlag KG Stuttgart · New York.

  13. Speculative dynamic vectorization to assist static vectorization in a HW/SW co-designed environment

    OpenAIRE

    Kumar, R.; Martinez, A.; Gonzalez, A.

    2013-01-01

    Compiler based static vectorization is used widely to extract data level parallelism from computation intensive applications. Static vectorization is very effective in vectorizing traditional array based applications. However, compilers inability to reorder ambiguous memory references severely limits vectorization opportunities, especially in pointer rich applications. HW/SW co-designed processors provide an excellent opportunity to optimize the applications at runtime. The availability of dy...

  14. Compaction and evolution of rock properties and rock physics diagnostics of Albatross discovery, SW Barents Sea

    OpenAIRE

    Butt, Arif

    2012-01-01

    The Albatross discovery is located approximately 140 km northwest of Hammerfest (city of midnight sun), Norway in the central part of Hammerfest Basin, SW Barents Sea. The Albatross discovery included within Snøhvit field development project (the first gas development project in the Barents Sea) with two other discoveries, Snøhvit and Askeladd, in the area. The reservoirs contain gas and condensate in the Lower and Middle Jurassic sandstones of the Stø Formation. The study focuses compaction ...

  15. Surface wave statistics and spectra for Valiathura coastlines, SW coast of India

    Digital Repository Service at National Institute of Oceanography (India)

    Asharaf, T.T.M.; Nair, R.P.; Sanjana, M.C.; Muraleedharan, G.; Kurup, P.G.

    Sciences Vol. 30, March , 2001, pp 9-17 Surface wave statistics and spectra for Valiathura coastline, SW coast of India T T Mohamed Asharaf National Institute of Oceanography, Regional Centre, Cochin, 682 014, India and Ratish P Nair, M.... 2D), the prominent direction was MOHAMED ASHARAF et al. : WAVE STATISTICS AND SPECTRA 11 Fig. 2Direction surface plots of January-June INDIAN J. MAR. SCI., VOL 30, MARCH 2001 12 Fig. 2  (Contd) ... Direction surface...

  16. Physico-chemical behaviour of underground waters after October 1, 1995 Dinar earthquake, SW Turkey

    International Nuclear Information System (INIS)

    Woith, H.; Milkereit, C.; Maiwald, U.; Pekdeger, A.

    1999-01-01

    The paper reports the investigations conducted by a team of the German Earthquake Task Force arrived in the city of Dinar (SW Turkey) after the October 1, 1994 earthquake. The investigations recorded post-seismic changes in water discharge, water temperature and conductivity. In the first month after the event, the groundwater discharge increased at springs located within the down-thrown block, whereas a slight decrease was observed at sites on the hanging wall

  17. Alkaloids in Solanum torvum Sw (Solanaceae): (With 2 Tables & 1 Figure)

    OpenAIRE

    Pérez-Amador, MC; Muñoz Ocotero, V; García Castañeda, JM; González Esquinca, AR

    2007-01-01

    A comparison was made between plants of Solanum torvum Sw that grow in Chiapas, Mexico, and plants of the same species originating from India. This was effected to establish either similarities or differences between these plants in total alkaloid contents and presence of solasodine, an important alkaloid for the partial synthesis of steroids. The total alkaloid content (0.12%) of the plants coming from Chiapas and India was the same. However, solasodine was found only in the plants of Chiapa...

  18. COxSwAIN: Compressive Sensing for Advanced Imaging and Navigation

    Science.gov (United States)

    Kurwitz, Richard; Pulley, Marina; LaFerney, Nathan; Munoz, Carlos

    2015-01-01

    The COxSwAIN project focuses on building an image and video compression scheme that can be implemented in a small or low-power satellite. To do this, we used Compressive Sensing, where the compression is performed by matrix multiplications on the satellite and reconstructed on the ground. Our paper explains our methodology and demonstrates the results of the scheme, being able to achieve high quality image compression that is robust to noise and corruption.

  19. Light-Time Effect and Mass Transfer in the Triple Star SW Lyncis

    Directory of Open Access Journals (Sweden)

    Chun-Hwey Kim

    1999-06-01

    Full Text Available In this paper all the photoelectric times of minimum for the triple star SW Lyn have been analyzed in terms of light-time e ect due to the third-body and secular period decreases induced by mass transfer process. The light-time orbit determined recently by Ogloza et al.(1998 were modi ed and improved. And it is found that the orbital period of SW Lyn have been decreasing secularly. The third-body revolves around the mass center of triple stars every 5y.77 in a highly eccentric elliptical orbit(e=0.61. The third-body with a minimum mass of 1.13M may be a binary or a white dwarf. The rate of secular period-decrease were obtained as ¡âP/P = -12.45 x 10^-11, implying the mass-transfer from the massive primary star to the secondary. The mass losing rate from the primary were calculated as about 1.24 x 10^-8M /y. It is noticed that the mass-transfer in SW Lyn system is opposite in direction to that deduced from it's Roche geometry by previous investigators.

  20. The primary role of the SW Sextantis stars in the evolution of cataclysmic variables

    Science.gov (United States)

    Torres, Manuel; Gaensicke, Boris; Rodriguez-Gil, Pablo; Long, Knox; Marsh, Tom; Steeghs, Danny; Munoz-Darias, Teodoro; Shahbaz, Tariq; Schmidtobreick, Linda; Schreiber, Matthias

    2009-02-01

    SW Sextantis stars are a relatively large group of cataclysmic variables (CVs) which plays a fundamental role in our understanding of CV structure and evolution. Very little is known about the properties of their accreting white dwarfs and their donor stars, as the stellar components are usually outshone by an extremely bright accretion flow. Consequently, a proper assesment of their evolutionary state is illusionary. We are monitoring the brightness of a number of SW Sex stars and request here Gemini/GMOS-N ToO time to obtain orbital phase-resolved spectroscopy if one of them enters a low state, since this is the only opportunity for studying the stellar components individually. These data will be used to accurately measure the binary parameters, white dwarf temperature, and distance to the system for a SW Sex star for the first time. The measured stellar masses and radii will especially be a precious input to the theory of compact binary evolution as a whole.

  1. Unravelling the role of the SW Sextantis stars in the evolution of cataclysmic variables

    Science.gov (United States)

    Torres, Manuel; Steeghs, Danny; Gaensicke, Boris; Marsh, Tom; Rodriguez-Gil, Pablo; Schmidtobreick, Linda; Long, Knox; Schreiber, Matthias

    2007-08-01

    SW Sextantis stars are a relatively large group of cataclysmic variables (CVs) whose properties contradict all predictions made by the current CV evolution theories. Very little is known about the properties of their accreting white dwarfs and their donor stars, as the stellar components are usually outshone by an extremely bright accretion flow. Consequently, a proper assesment of their evolutionary state is illusionary. We are monitoring the brightness of a number of SW Sex stars and request here Gemini/GMOS-N ToO time to obtain orbital phase-resolved spectroscopy if one of them enters a low state, since this is the only opportunity for studying the stellar components individually. These data will be used to accurately measure the mass ratio of the system which, combined with the orbital inclination derived from modelling of either the disc eclipses in the high state or the ellipsoidal modulation in the low state, will eventually provide the first detailed system parameters for any SW Sex star.

  2. New data on distribution of Cypripedium macranthon sw. on the territory of Altai krai

    Directory of Open Access Journals (Sweden)

    S. V. Vazhov

    2017-12-01

    Full Text Available The Family Orchidaceae Juss. –occupies an important place among the plants, which were highlighted related to their biology and ecology. The total number of species of the family in the Altai region – 27 (ruberoidny -13, rhizomatous – 14, 10 species of orchids are rare and protected. Among the many flowering plants highlights one of the most beautiful and the most noticeable because of its large flowers Orchid – lady's slipper large-flowered Cypripedium (Cypripedium macranthon Sw.. This species is rare and listed in the regional Red book, as residential landscape areas suffers from collecting in bouquets and digging out the gardeners for the introduction into the culture. Exterminated Orchid in the procurement of herbal raw materials in traditional medicine. The Shoe form a plurality of decorative forms that is of interest to collectors of plants, promotes the collection and implementation in connection with the market demand. Increasing anthropogenic load on the territory of the region, which also adversely affects the number and state of coenopopulations of C. macranthon Sw. For the Altai territory, the modern updated data on the habitat of the Orchid. Four previously unknown local populations of C. macranthon Sw. it is noted in the upper basin of the river Angara in the virgin area.

  3. Antibiofilm activity of Bacillus pumilus SW9 against initial biofouling on microfiltration membranes.

    Science.gov (United States)

    Zhang, Ying; Yu, Xin; Gong, Song; Ye, Chengsong; Fan, Zihong; Lin, Huirong

    2014-02-01

    Membrane biofouling, resulting from biofilm formation on the membrane, has become the main obstacle hindering wider application of membrane technology. Initial biofouling proves to be crucial which involves early stages of microbial adhesion and biofilm formation. Biological control of microbial attachment seems to be a promising strategy due to its high efficiency and eco-friendliness. The present study investigated the effects of a bacterium Bacillus pumilus SW9 on controlling the initial fouling formed by four target bacterial strains which were pioneer species responsible for biofouling in membrane bioreactors, using microfiltration membranes as the abiotic surfaces. The results suggested that strain SW9 exhibited excellent antibiofilm activity by decreasing the attached biomass of target strains. The production of extracellular polysaccharides and proteins by four target strains was also reduced. A distinct improvement of permeate flux in dead-end filtration systems was achieved when introducing strain SW9 to microfiltration experiments. Scanning electron microscopy and confocal laser scanning microscopy were performed to further ascertain significant changes of the biofouling layers. A link between biofilm inhibition and initial biofouling mitigation was thus provided, suggesting an alternatively potential way to control membrane biofouling through bacterial interactions.

  4. Effect of nitrogen sources on biomass, lipid and docosahexanoic acid production by Aurantiochytrium sp. SW1

    Science.gov (United States)

    Auma, Khairunnisa; Hamid, Aidil Abdul; Yusoff, Wan Mohtar Wan

    2018-04-01

    A local isolate, Aurantiochytrium sp. SW1 has been verified to have high content of docosahexanoic acid (DHA). However, the effect of different nitrogen sources on biomass, lipid concentration and DHA content in Aurantiochytrium sp. SW1 is still unknown. Hence, this study is focused in using six different organic and inorganic nitrogen sources to grow Aurantiochytrium sp. SW1 in optimized Burja medium. Monosodium glutamate (MSG) gave the highest biomass concentration of 15.97 g/L followed by ammonium nitrate (NH4NO3) with 13.37 g/L at 96 hr. These two nitrogen sources had significant effect on the biomass concentration (pDHA content in lipid showed cultivation using MSG reached 47.9% (4.95 g/L). Statistical analysis using least significant difference (LSD) showed significant lipid production (pDHA productivity (0.052 g/L hr-1) was obtained in medium containing MSG. This study proves that nitrogen component in the medium significantly affects the biomass concentration, lipid and DHA content.

  5. An Orbital Stability Study of the Proposed Companions of SW Lyncis

    Directory of Open Access Journals (Sweden)

    T. C. Hinse

    2014-09-01

    Full Text Available We have investigated the dynamical stability of the proposed companions orbiting the Algol type short-period eclipsing binary SW Lyncis (Kim et al. 2010. The two candidate companions are of stellar to substellar nature, and were inferred from timing measurements of the system’s primary and secondary eclipses. We applied well-tested numerical techniques to accurately integrate the orbits of the two companions and to test for chaotic dynamical behavior. We carried out the stability analysis within a systematic parameter survey varying both the geometries and orientation of the orbits of the companions, as well as their masses. In all our numerical integrations we found that the proposed SW Lyn multi-body system is highly unstable on time-scales on the order of 1000 years. Our results cast doubt on the interpretation that the timing variations are caused by two companions. This work demonstrates that a straightforward dynamical analysis can help to test whether a best-fit companion-based model is a physically viable explanation for measured eclipse timing variations. We conclude that dynamical considerations reveal that the proposed SW Lyncis multi-body system most likely does not exist or the companions have significantly different orbital properties from those conjectured in Kim et al. (2010.

  6. WATER TEMPERATURE and Other Data from ALMIRANTE SALDANHA From SW Atlantic (limit-20 W) (NODC Accession 9700075)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Zooplankton, phytoplankton, chlorophyll, and other data were collected from net and bottle casts in the SW Atlantic Ocean (limit-20 W) from the Almirante Saldanha...

  7. Calamagrostis nyingchiensis, a new combination for Deyeuxia nyingchiensis (Poaceae: Agrostidinae, and its first record from Yunnan Province, SW China

    Directory of Open Access Journals (Sweden)

    Paszko Beata

    2016-07-01

    Full Text Available Deyeuxia nyingchiensis is here recombined as Calamagrostis nyingchiensis comb. nov. as a result of recent studies of worldwide Agrostidinae. A new record of C. nyingchiensis is reported from Shangri-la (Zhongdian County in Yunnan Province, SW China. Previously, C. nyingchiensis was noted from eastern Xizang and southern Sichuan, SW China. It is compared with the morphologically similar species C. scabrescens. A map with all known geographic records of C. nyingchiensis is presented.

  8. Incidencia de los antecedentes de funcionalidad familiar, consumo de sustancias psicoactivas y enfermedad mental frente al intento de suicidio

    Directory of Open Access Journals (Sweden)

    Jomaira Benedicta Gaona-Ordoñez

    2012-12-01

    Full Text Available Objetivo: valorar el antecedente de funcionalidad familiar, el consumo de sustancias psicoactivas y enfermedad mental frente al intento de suicidio en los adolescentes. Materiales y Métodos: de naturaleza cuantitativa de tipo analítico retrospectivo de casos y controles teniendo una población de 20 personas en cada grupo (13 mujeres y 7 hombres. Para llevar a cabo la recolección de los datos, se utilizaron tres instrumentos Test De Goldberg, FF-SIL, y Consumo de Sustancias Psicoactivas. Resultados: se encontró asociación estadísticamente significativa después de aplicar el T Student, los resultados de cada ítem se valoran en una escala de Likert: finalizando se realiza la sumatoria de los puntos que corresponden a la escala de categorías de funcionamiento familiar agrupándolas así: de 50 a 57 puntos corresponde a la familia funcional, de 56 a 43 puntos es la familia moderadamente funcional, de 42 a 28 puntos es la familia disfuncional y de 2 a 28 puntos es la que agrupa a la familia severamente disfuncional entre funcionalidad familiar y enfermedad mental frente al intento de suicidio principalmente en mujeres entre las edades de 19 a 22 años. Conclusiones: las conductas suicidas se presenta en las familias por el grado de disfuncionalidad familiar y enfermedad mental debido a que en los hogares predomina las preocupaciones y la falta armonía. El consumo sustancias psicoactivas no es incidente frente al intento de suicidio.

  9. POTENCIAL DEL ALMIDÓN RESISTENTE RETROGRADADO DE PAPA FRENTE A OTROS ADITIVOS FUNCIONALES USADOS EN POLLOS DE ENGORDE

    Directory of Open Access Journals (Sweden)

    D. Rodríguez-Aguilar

    2014-01-01

    Full Text Available El almidón resistente retrogradado (AR3 de las variedades de papa Pastusa (Solanum tuberosum grupo tuberosum y Guaneña (Solanum tuberosum grupo phureja fue evaluado como aditivo funcional con características similares a la fibra dietaria y por su potencial prebiótico en pollos de engorde. Se asignaron aleatoriamente 792 pollos machos Ross de un día de edad a uno de cinco tratamientos experimentales bajo un diseño completamente al azar. Se evaluaron niveles de suplementación de 1,0% de AR3 –Pastusa (AR3P y Guaneña (AR3G–, frente a manano-oligosacáridos (MOS, 0,5%, carboximetilcelulosa (CMC, 1%, levadura comercial (LEV, 0,5% y un control sin suplementar. Los datos se analizaron mediante el procedimiento GLM del programa SAS®. MOS y AR3P mostraron el mayor peso y ganancia de peso corporal al día 42 de edad (P<0,05, MOS presentó el menor consumo de alimento frente al tratamiento CMC (P<0,05, con una mejor conversión alimenticia comparado con CMC y el control sin suplementar (P<0,05. Los grupos AR3P y AR3G tuvieron un comportamiento intermedio para la conversión de alimento. El mayor porcentaje de eficiencia americana e índice de productividad fue para MOS, seguido de AR3P frente al control sin suplementar (P<0,05. Con referencia al ingreso neto parcial por pollo fraccionado, MOS mostró el mayor ingreso comparado con AR3G, observando para los demás tratamientos un comportamiento intermedio (P<0,05. Los resultados sugieren que el AR3P tiene potencial para ser usado como un aditivo funcional en dietas para pollos de engorde durante un ciclo comercial de producción.

  10. The Characteristics of Seismogenic Zones in SW Taiwan: Implications from Studying Mechanisms of Microearthquakes

    Science.gov (United States)

    Wen, Strong; Chang, Yi-Zen; Yeh, Yu-Lien; Wen, Yi-Ying

    2017-04-01

    Due to the complicated geomorphology and geological conditions, the southwest (SW) Taiwan suffers the invasion of various natural disasters, such as landslide, mud flow and especially the threat of strong earthquakes as result of convergence between the Eurasian and the Philippine Sea plate. Several disastrous earthquakes had occurred in this area and often caused serious hazards. Therefore, it is fundamentally important to understand the correlation between seismic activity and seismogenic structures in SW Taiwan. Previous studies have indicated that before the failure of rock strength, the behaviors of micro-earthquakes can provide essential clues to help investigating the process of rock deformation. Thus, monitoring the activity of micro-earthquakes plays an important role in studying fault rupture or crustal deformation before the occurrence of a large earthquake. Because the time duration of micro-earthquakes activity can last for years, this phenomenon can be used to indicate the change of physical properties in the crust, such as crustal stress changes or fluid migration. The main purpose of this research is to perform a nonlinear waveform inversion to investigate source parameters of micro-earthquakes which include the non-double couple components owing to the shear rupture usually associated with complex morphology as well as tectonic fault systems. We applied a nonlinear waveform procedure to investigate local stress status and source parameters of micro-earthquakes that occurred in SW Taiwan. Previous studies has shown that microseismic fracture behaviors were controlled by the non-double components, which could lead to cracks generating and fluid migration, which can result in changing rock volume and produce partial compensation. Our results not only giving better understanding the seismogenic structures in the SW Taiwan, but also allowing us to detect variations of physical parameters caused by crack propagating in stratum. Thus, the derived source

  11. Fundamentos para una moral natural: la necesidad del naturalismo ético frente al racionalismo axiológico

    OpenAIRE

    Clarke Paliza, George

    2012-01-01

    En esta tesis se discute la validez de los valores morales racionales frente a los valores del mundo natural. Con respecto al antagonismo tradicional entre la moral y la natu-raleza, se presentan los fundamentos para la creación de una moral natural, es decir, una moral cuyas bases axiológicas toman como parámetro a la naturaleza. El carácter histórico y contingente del idealismo moral muestra su insuficiencia para fundar un sistema axiológico fiable que siga el curso de los acontecimientos n...

  12. Entre guerra y paz. América Latina frente a la tragedia del primer conflicto mundial

    OpenAIRE

    Graziano Palamara

    2015-01-01

    El trabajo propone un análisis sobre las posturas latinoamericanas frente a la Primera Guerra Mundial —PGM—. La reflexión se fundamenta en un modelo interpretativo que considera las guerras de alcance mundial no solo como el punto de disgregación de un sistema internacional, sino más bien como el momento fundante de un nuevo orden. Este modelo permite reflexionar sobre la manera en que Latinoamérica se acercó al declive del orden posnapoleónico y la conducta que ella tuvo cuando, en 1917, con...

  13. La calidad educativa frente a los nuevos desafíos que plantea la educación personalizada

    OpenAIRE

    Vanegas Ossa, Jairo de Jesús

    2014-01-01

    Tesis (Especialista en Educación Personalizada). Universidad Católica de Manizales, Facultad de Educación, 2014 La sociedad evoluciona y con ella las comunicaciones. El hombre de hoy trata de comprender, asimilar e interpretar los torrentes de información aprovechando las TIC, pero determinando lo que es adecuado y lo que no lo es, utilizando ética y responsablemente dichas herramientas. En la contemporaneidad, el ser humano no está sólo frente a la educación formal presencial, sino que ti...

  14. Los determinantes de la percepción de inseguridad frente al delito en México

    OpenAIRE

    Vilalta, Carlos J.

    2012-01-01

    ¿Qué determina la sensación de inseguridad frente al delito y qué podemos hacer al respecto? En este estudio se propone y pone a prueba un modelo correlacional que combina diferentes determinantes teóricos de la inseguridad y el miedo al crimen. La prueba se realiza en México y en dos ámbitos espaciales diferentes: el ámbito nacional y el ámbito del Área Metropolitana de la Ciudad de México. Las fuentes de información son la Encuesta Nacional de Victimización y Percepción sobre Seguridad Públ...

  15. Antagonismo in vitro de cepas de Trichoderma spp. frente a Sarocladium oryzae (Sawada) W. Gams & D. Hawksworth

    OpenAIRE

    Martínez, Benedicto; Obret, Yalainne; Pérez, Simón; Reyes, Yusimy

    2014-01-01

    Se evaluaron 27 aislamientos de Trichoderma spp. frente a dos de Sarocladium oryzae (Sawada) W. Gams & D. Hawksworth (S. o-2 y S. o-4) utilizando la técnica de cultivo dual, comparando el crecimiento de las colonias de Sarocladium para determinar los modos de acción, en diferentes fases de la interacción. El análisis estadístico de los datos se realizó mediante la prueba T- Student. El 81,48% de los aislamientos de Trichoderma presentó competencia por el sustrato, el 25,93% antibiosis y el 11...

  16. Análisis comparativo del sector agropecuario colombiano frente al tratado de libre comercio con Chile

    OpenAIRE

    Eslava Ardila, Paula

    2014-01-01

    El presente trabajo es un análisis comparativo entre el sector agropecuario de Colombia frente al de Chile, en el marco del Tratado de Libre Comercio, con el objetivo de evaluar los productos potenciales de exportación del sector colombiano, y de esta manera aprovechar los recursos y las ventajas competitivas en oportunidades de progreso. Para el desarrollo del análisis, se describe cada uno de los países en términos económicos con variables como: PIB, PIB per cápita, Balanza Comercial, gr...

  17. Percepción y actitudes frente al acoso sexual callejero en estudiantes mujeres de una Universidad Privada de Medicina

    OpenAIRE

    Llerena Benites, Ruth Corazón; Universidad de San Martín de Porres

    2016-01-01

    Objetivo: Determinar la percepción y las actitudes frente al acoso sexual callejero que tienen las estudiantes mujeres del bloque clínico de la Facultad de Medicina Humana de la Universidad San Martín de Porres.Material y Métodos: Estudio descriptivo de corte transversal en el cual se aplicaron los cuestionarios, tipo Likert previamente validados, la “Escala de aceptación de mitos modernos sobre la agresión sexual” y la “Escala de acoso callejero”, de forma virtual a 227 estudiantes mujeres p...

  18. Seroepidemiología frente a citomegalovirus en la Comunidad de Madrid

    Directory of Open Access Journals (Sweden)

    Ory Manchón Fernando de

    2001-01-01

    Full Text Available Fundamento: La infección por citomegalovirus (CMV es frecuentemente asintomática. Sin embargo, constituye una importante causa de infección congénita y de patología severa en sujetos inmunodeprimidos, por lo que representa un problema en Salud Pública. El objeto de este trabajo fue conocer la prevalencia de IgG frente a CMV (IgG-CMV en la población general madrileña. Métodos: Estudio transversal en el que se detectó IgG-CMV en una muestra representativa de la población general de la Comunidad de Madrid de entre 2 y 60 años (n=2030. Se realizó un muestro bietápico estratificado por conglomerados (octubre de 1993 y febrero de 1994. Para el análisis estadístico se emplearon los test de *2 y *2 de tendencia lineal y se calcularon los porcentajes de seroprevalencia y los odds ratios con intervalos de confianza del 95%. Resultados: La seroprevalencia global fue del 62,8% (IC95%: 60,6-64,9; 66,7% (IC95%: 63,7-69,5 en mujeres y del 58,4% (IC95%: 55,2-61,5 en hombres. Se observó una asociación significativa entre el aumento de la edad y el incremento de la seroprevalencia. Fueron factores significativos de riesgo la consulta al dentista, antecedentes de cirugía, acupuntura y tatuajes. Los estudios superiores constituyeron un factor protector. Conclusión: Aunque los factores de riesgo detectados indican una posible transmisión vía sanguínea, la elevada prevalencia apunta a la existencia de otras vías mas comunes. El aumento de la seroprevalencia dependiente de la edad sugiere que se produce un número importante de infecciones en la edad adulta. No se puede excluir, sin embargo, que este aumento responda a un efecto cohorte debido a mejoras socioeconómicas similar al detectado para otros virus.

  19. SEROEPIDEMIOLOGÍA FRENTE A CITOMEGALOVIRUS EN LA COMUNIDAD DE MADRID

    Directory of Open Access Journals (Sweden)

    Fernando de Ory Manchón

    2001-01-01

    Full Text Available Fundamento: La infección por citomegalovirus (CMV es frecuentemente asintomática. Sin embargo, constituye una importante causa de infección congénita y de patología severa en sujetos inmunodeprimidos, por lo que representa un problema en Salud Pública. El objeto de este trabajo fue conocer la prevalencia de IgG frente a CMV (IgG-CMV en la población general madrileña. Métodos: Estudio transversal en el que se detectó IgG-CMV en una muestra representativa de la población general de la Comunidad de Madrid entre 2 y 60 años (n=2030. Se realizó un muestro bietápico estratificado por conglomerados (octubre de 1993 y febrero de 1994. Para el análisis estadístico se emplearon los test de 2 y 2 de tendencia lineal y se calcularon los porcentajes de seroprevalencia y los odds ratios con intervalos de confianza del 95%. Resultados: La seroprevalencia global fue del 62,8% (IC95%: 60,6-64,9; 66,7% (IC95%: 63,7-69,5 en mujeres y del 58,4% (IC95%: 55,2-61,5 en hombres. Se observó una asociación significativa entre el aumento de la edad y el incremento de la seroprevalencia. Fueron factores significativos de riesgo la consulta al dentista, antecedentes de cirugía, acupuntura y tatuajes. Los estudios superiores constituyeron un factor protector. Conclusión: Aunque los factores de riesgo detectados indican una posible transmisión vía sanguínea, la elevada prevalencia apunta a la existencia de otras vías mas comunes. El aumento de la seroprevalencia dependiente de la edad sugiere que se produce un número importante de infecciones en la edad adulta. No se puede excluir, sin embargo, que este aumento responda a un efecto cohorte debido a mejoras socioeconómicas similar al detectado para otros virus.

  20. Tiempo de crisis. El patrimonio audiovisual valenciano frente al cambio tecnológico

    Directory of Open Access Journals (Sweden)

    Lahoz Rodrigo, Juan Ignacio

    2014-07-01

    Full Text Available Tras tres décadas de autogobierno, la Generalitat Valenciana ha creado, fomentado, recopilado y restaurado un patrimonio audiovisual de incalculable interés cultural que tiene en la Filmoteca de CulturArts-IVAC y en el archivo de RTVV sus dos grandes centros de conservación. Este patrimonio se encuentra en un punto crítico por la necesidad de afrontar su transformación tecnológica en un momento de gran dificultad económica y política. El cierre de RTVV y la incertidumbre sobre el futuro de su archivo llevan a contraponer su carácter patrimonial a la tentación de privatizar su gestión y a recordar las recomendaciones de la UE y de la UNESCO para que sean archivos públicos y sin ánimo de lucro quienes se ocupen de la salvaguarda de las imágenes en movimiento. Si la fragilidad de los soportes de la cinematografía, del vídeo y de los ficheros digitales de imagen es la clave de su conservación a largo plazo, más determinante resulta hoy el imperio de la tecnología digital en todos los ámbitos de la generación, acceso y conservación de la producción audiovisual, pues conlleva un patrón de obsolescencia que puede suponer el bloqueo del patrimonio audiovisual valenciano si la Generalitat no le hace frente de forma inmediata y decidida: dotar a la Filmoteca de CulturArts-IVAC del equipamiento tecnológico necesario para la digitalización de sus fondos, dar continuidad a los planes de digitalización del archivo de RTVV y estimular los de todos los archivos audiovisuales de la Comunitat Valenciana, reforzar –en sintonía con las recomendaciones de la UE- el acento conservacionista de instrumentos como las ayudas públicas a la producción o el depósito legal y estimular el desarrollo del Catálogo del Patrimonio Audiovisual Valenciano son medidas que deben coadyuvar a la conservación a largo plazo de nuestro patrimonio.

  1. O psiquiatra forense frente às demandas dos tribunais de família

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    Lisieux E de Borba Telles

    2015-07-01

    Full Text Available Resumo Nas sociedades contemporâneas, a união entre as pessoas ocorre, de forma mais frequente, a partir das escolhas afetivas. No Brasil da última década, observou-se o aumento de 20% nas dissoluções de uniões conjugais. Alguns cônjuges não conseguem superar as dificuldades que emergem quando do término da relação, passando os filhos a serem alvo da conduta dos pais, configurando, em alguns casos, a Síndrome da Alienação Parental, observada em certos litígios que chegam às Varas de Família. O presente artigo enfoca o papel do psiquiatra forense frente às demandas oriundas das separações conjugais, à Síndrome de Alienação Parental e às legislações relacionadas a esta síndrome, em especial à lei brasileira nº 12.318, de 26 de agosto de 2010. Palavras chave: Criança; Divórcio; Avaliação; Psiquiatria forense (DeCS. Summary In modern societies, people decide to marry, more frequently, based on affective choices. In Brazil, during the last decade, there was a 20% increase in marital unions dissolutions. Some spouses fail to overcome the problems and difficulties that arise at the end of a relationship, with their children being the ones affected by their parents’ actions and behavior, thus giving place, in some cases, to the Parental Alienation Syndrome, which is observed in certain disputes that reach Family Courts. This article focuses on the Forensic Psychiatry role regarding the claims and demands that arise from marital dissolution, the Parental Alienation Syndrome and the legislation related to this syndrome, in particular the Brazilian Law 12.318, issued on August 26th, 2010. Keywords: Child; Custody; Divorce; Forensic Psychiatry (MeSH.

  2. Respuesta del sistema antioxidante en varones sanos, frente a hiperglicemia aguda inducida

    Directory of Open Access Journals (Sweden)

    Raquel Oré

    2009-09-01

    Full Text Available Objetivo: determinar la respuesta del sistema antioxidante en varones sanos, frente a la hiperglicemia aguda inducida. Diseño: estudio prospectivo, descriptivo, longitudinal, experimental. Lugar: Instituto Nacional de Biología Andina, Facultad de Medicina, Universidad Nacional Mayor de San Marcos, Lima, Perú. Material biológico: Sangre y suero de sujetos aparentemente sanos. Intervenciones: A 13 sujetos adultos clínicamente sanos, entre 20 y 41años, después de 10 horas de ayuno, se administró glucosa vía endovenosa, mediante el método de clamp hiperglicémico, a 125 mg/dL por encima del valor basal, durante 120 minutos. Se realizó mediciones de la glicemia a 0, 5, 10, 15, 20, 30, 40, 50, 60, 70, 80, 90, 100, 110 y 120 minutos. Se tomó la muestra sanguínea con anticoagulante EDTA y otra de sangre total, para obtención de suero, para las pruebas bioquímicas a los 0, 60 y 120 minutos. Principales medidas de resultados: Modificaciones de la glicemia y lipoperoxidación en suero, glutatión y actividad superóxido dismutasa en glóbulos rojos lisados e índices de estrés oxidativo. Resultados: El nivel de glucosa durante el clamp hiperglicémico, luego de alcanzar el ‘equilibrio’, fue 197±17,58 mg/dL. La lipoperoxidación aumentó de 2,54 + 0,51 a 2,90 + 0,58 umol/L, de 0 a 60 minutos, y a 2,66 + 0,55 umol/L a los 120 minutos. El glutatión se redujo en 8,10% a la hora, aumentando 7,08% a los 120 minutos. La actividad superóxido dismutasa se elevó 0,54% a los 60 minutos y 5,66% a los 120 minutos, sobre el basal. Los índices de valoración del estrés oxidativo tuvieron correlación r Pearson positiva, en nivel alto a muy alto. Conclusiones: la hiperglicemia aguda inducida hasta 2 horas elevó el estrés oxidativo, promoviendo generación de defensa antioxidante, con síntesis de glutatión reducido de novo y mayor actividad de la superóxido dismutasa.

  3. Percepción, expectativas y temores frente al regreso a la libertad en una muestra de reclusos colombianos en el año 2011

    Directory of Open Access Journals (Sweden)

    Ómar Huertas Díaz

    2015-08-01

    Full Text Available El objetivo fue conocer la percepción frente al regreso a la libertad en una muestra de internos e internas condenados en doce establecimientos carcelarios y penitenciarios del Instituto Nacional Penitenciario y Carcelario (INPEC, y explorar las expectativas y los temores frente al regreso a la libertad. Para ello se aplicó el instrumento denominado "cuestionario de expectativas, percepciones y temores frente al regreso a la libertad" a 202 internos e internas, al igual que se realizaron unas preguntas sociodemográficas. Entre los resultados se encontró que más del 50 % de los internos e internas presentan un nivel alto de expectativas, percepciones y temores frente al regreso a la libertad, lo cual se relaciona con percepciones positivas, elevados niveles de seguridad y altas expectativas, a excepción de los ítems relacionados con las expectativas frente a la consecución de empleo, la formación recibida y su relación con la oferta laboral; los ítems relacionados con la confianza de la comunidad hacia ellos y la solidaridad y apoyo de la misma, y finalmente un ítem referido a la percepción de la ayuda económica por parte de la familia hacia ellos. Con referencia a la escala, presentó un Alfa de Cronbach de 0,77, un índice de confiabilidad alto.

  4. Modelamiento de la propagación de los frentes de contaminación generados por el transporte de combustibles por poliducto

    Directory of Open Access Journals (Sweden)

    ALEXANDER CONCHA DEMOYA

    2007-01-01

    Full Text Available Se propone un modelo matemático para predecir el crecimiento de la zona de mezcla o frente de contaminación que se genera entre combustibles derivados del petróleo como consecuencia de su transporte secuencial por poliductos. Dicho modelo se construye a partir de conceptos básicos de fenómenos de transporte, introduciendo un coeficiente efectivo de transferencia de masa que tiene en cuenta el mecanismo de difusión pura y su aporte a la convección. El modelo, una vez ajustado con datos de campo, se aplica para predecir el volumen del frente de contaminación y para analizar el efecto de variables como la longitud y el diámetro del poliducto, y la tasa de flujo sobre el crecimiento del volumen del frente.

  5. CONHECIMENTO DA EQUIPE DE ENFERMAGEM DE UNIDADES MATERNO-INFANTIS FRENTE AOS DISTÚRBIOS GENÉTICOS

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    Valquiria Maria de Paula Cunha

    2010-01-01

    Full Text Available Los avances en el área de Genética Humana están revolucionando el entendimiento de salud-enfermedad, tornándose un reto y un impacto en la expansión del papel de la enfermería. El objetivo del presente estudio fue identificar el conocimiento del equipo de enfermería para hacer frente a las anomalías genéticas. Se trata de un estudio exploratorio-descriptivo y transversal, realizado a través de entrevista realizada con 171 profesionales del equipo de enfermería de sectores maternoinfantiles. La mayoría de los entrevistados informó que es capaz de reconocer un síndrome genético, siendo el síndrome de Down el más conocido. Sin embargo, la mayoría no supo informar correctamente cuál sería el apoyo necesario en estos casos. Se observa que el equipo no está preparado para tratar este asunto con familiares de niños portadores de anomalías genéticas. Frente a lo expuesto, es necesaria la capacitación en este campo.

  6. The Popular Front elections in the province of Alicante | Las elecciones del Frente Popular en la provincia de Alicante

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    Juan Martínez Leal

    2012-12-01

    Full Text Available The Popular Front elections were the last and most critical one made during the Second Spanish Republic. Confronted the Spanish in two major electoral blocks, these elections were experienced with particular intensity in the province of Alicante, where the Republic had taken deep roots, especially in the industrial towns and in the capital. For the first time, according to the official canvass of the Provincial Electoral Board, results on scrutiny of votes are sorted out by town in order to compose a comprehensive electoral map of the whole province. The Popular Front won the elections in a clear but tight manner, although, above all, it was a democratic and clean process. | Las elecciones del Frente Popular fueron las últimas y más decisivas realizadas durante la Segunda República Española. Confrontados los españoles en dos grandes bloques electorales, estas elecciones se vivieron con una especial intensidad en la provincia de Alicante, donde la República había echado hondas raíces, especialmente en los pueblos industriales y en la capital. Por primera vez, en base al Acta del Escrutinio Oficial de la Junta del Censo Electoral Provincial se recogen los resultados ordenados pueblo a pueblo para componer un completo mapa electoral de toda la provincia. El Frente Popular venció en los comicios de forma clara pero ajustada y, sobre todo, de forma limpia y democrática.

  7. Atitudes de enfermeiros de hospital geral frente às características pessoais do paciente alcoolista

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    Divane de Vargas

    2010-12-01

    Full Text Available Estudo exploratório que objetivou verificar as atitudes de enfermeiros de hospital geral frente às características pessoais de alcoolista. Na coleta de dados, utilizou-se a subescala IV da Seamon-Mannello Scale , a amostra constituiu-se de 171 enfermeiros de um hospital universitário do Estado de São Paulo. Os resultados evidenciaram que mais da metade da amostra (52,4% possui experiência profissional com alcoolistas, sendo estes percebidos pelos participantes, como uma pessoa infeliz, solitária, sensível, que duvida de seu próprio valor e apresenta severas dificuldades emocionais. Concluiu-se que as atitudes desses enfermeiros frente às características pessoais do paciente alcoolista tendem a ser positivas e sugere-se que maior atenção seja dada ao treinamento desse profissional para reconhecimento e abordagem do alcoolista em hospital geral.

  8. Cloud effects on the SW radiation at the surface at a mid-latitude site in southwestern Europe

    Science.gov (United States)

    Salgueiro, Vanda; João Costa, Maria; Silva, Ana Maria; Lanconelli, Christian; Bortoli, Daniele

    2017-04-01

    This work presents a study of cloud radiative effects on shortwave (CRESW) radiation at the surface in Évora region (southwestern Europe) during 2015 and a case study is analyzed. CRESW (in Wm-2) is defined as the difference between the net shortwave irradiance (downward minus upward shortwave irradiance) in cloudy and clear sky conditions. This measure is usually used to translate changes in the SW radiation that reaches the surface due to changes in clouds (type and/or cover). The CRESW is obtained using measured SW irradiance recorded with a Kipp&Zonen CM 6B pyranometer (broadband 305 - 2800 nm) during the period from January to December 2015, and is related with the cloud liquid water path (LWP) and with cloud ice water path (IWP) showing the importance of the different type of clouds in attenuating the SW radiation at the surface. The cloud modification factor, also a measure of the cloud radiative effects (CMF; ratio between the measured SW irradiance under cloudy conditions and the estimated SW irradiance in clear-sky conditions) is related with the cloud optical thickness (COT; obtained from satellite data). This relation between CMF and COT is shown for different cloud fractions revealing an exponential decreasing of CMF as COT increases. Reductions in the SW radiation of the order of 80% (CMF = 0.2) as well enhancements in the SW radiation larger than 30% (CMF = 1.3) were found for small COT values and for different cloud fractions. A case study to analyse the enhancement events in a cloudy day was considered and the cloud properties, COT and LWP (from satellite and surface measurements), were related with the CRESW.

  9. Dual Effect of Phenolic Nectar on Three Floral Visitors of Elsholtzia rugulosa (Lamiaceae) in SW China.

    Science.gov (United States)

    Zhang, Feng-Ping; Yang, Qiu-Yun; Zhang, Shi-Bao

    2016-01-01

    Some plants secrete toxic nectar to appeal to most effective pollinators and deter non-pollinators or nectar thieves; however available information about ecological function of toxic nectar remains scarce. Elsholtzia rugulosa stands out as a plant with toxic nectar recorded in SW China. We focused on the functional significance of the phenolic compound that imparts toxic to the nectar of E. rugulosa. The effects of phenolic nectar were studied in three visitors of the flowers of the winter-blooming E. rugulosa Hemsl. (Lamiaceae) in SW China. The pollinating species Apis cerana Fabricius (Apidae; Asian honey bee) and two occasional visitors, Vespa velutina Lepeletier (Vespidae; yellow-legged Asian hornet) and Bombus eximius Smith (Apidae; a bumble bee) were tested for their preferences for low and high concentrations of 4-hydroxybenzoic acid in hexose and sucrose solutions. The pollinator is important for the plant, which is dependent on pollinator visits to attain a higher seed production and it is most likely that the combination of phenolic toxic nectar and the adaptation to phenolic nectar by A. cerana delivers an evolutionary advantage to both actors. The low and high concentrations of the phenolic acid were nearly totally refused by both occasional visitors V. velutina and B. eximius and were preferred by the pollinator A. cerana. E. rugulosa gains by having a much higher seed production and the pollinating honey bee by having an exclusive and reliable food source during the winter season at high altitudes in SW China. We found that the function of the toxic phenolic compound has dual roles by appealing to legitimate pollinators and deterring non-pollinators of E. rugulosa.

  10. Dual Effect of Phenolic Nectar on Three Floral Visitors of Elsholtzia rugulosa (Lamiaceae in SW China.

    Directory of Open Access Journals (Sweden)

    Feng-Ping Zhang

    Full Text Available Some plants secrete toxic nectar to appeal to most effective pollinators and deter non-pollinators or nectar thieves; however available information about ecological function of toxic nectar remains scarce. Elsholtzia rugulosa stands out as a plant with toxic nectar recorded in SW China. We focused on the functional significance of the phenolic compound that imparts toxic to the nectar of E. rugulosa. The effects of phenolic nectar were studied in three visitors of the flowers of the winter-blooming E. rugulosa Hemsl. (Lamiaceae in SW China. The pollinating species Apis cerana Fabricius (Apidae; Asian honey bee and two occasional visitors, Vespa velutina Lepeletier (Vespidae; yellow-legged Asian hornet and Bombus eximius Smith (Apidae; a bumble bee were tested for their preferences for low and high concentrations of 4-hydroxybenzoic acid in hexose and sucrose solutions. The pollinator is important for the plant, which is dependent on pollinator visits to attain a higher seed production and it is most likely that the combination of phenolic toxic nectar and the adaptation to phenolic nectar by A. cerana delivers an evolutionary advantage to both actors. The low and high concentrations of the phenolic acid were nearly totally refused by both occasional visitors V. velutina and B. eximius and were preferred by the pollinator A. cerana. E. rugulosa gains by having a much higher seed production and the pollinating honey bee by having an exclusive and reliable food source during the winter season at high altitudes in SW China. We found that the function of the toxic phenolic compound has dual roles by appealing to legitimate pollinators and deterring non-pollinators of E. rugulosa.

  11. Sedimentary features and exploration targets of Middle Permian reservoirs in the SW Sichuan Basin

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    Guoming Xu

    2015-11-01

    Full Text Available The exploration direction and targets for the large-scale Middle Permian gas reservoirs in the Sichuan Basin are hot spots and challenges in current exploration researches. The exploration successes of large gas field of Cambrian Longwangmiao Formation in Gaoshiti-Moxi region, Central Sichuan Basin, indicated that prospective sedimentary facies belt was the basis for the formation of large gas fields. In this paper, based on seismic data, outcrop data and drilling data, the tectonic framework and sedimentary features of the Middle Permian in the SW Sichuan Basin were comprehensively studied. The following conclusions were reached from the perspective of sedimentary facies control: (1 during the Middle Permian, this region was in shallow water gentle slope belts with high energy, where thick reef flat facies were deposited; (2 the basement was uplifted during Middle Permian, resulting in the unconformity weathering crust at the top of Maokou Formation due to erosion; the SW Sichuan Basin was located in the karst slope belt, where epigenic karstification was intense; and (3 reef flat deposits superimposed by karst weathering crust was favorable for the formation of large-scale reef flat karst reservoirs. Based on the combination of the resources conditions and hydrocarbon accumulation conditions in this region, it was pointed out that the Middle Permian has great potential of large-scale reef flat karst gas reservoir due to its advantageous geological conditions; the Middle Permian traps with good hydrocarbon accumulation conditions were developed in the Longmen Mountain front closed structural belt in the SW Sichuan Basin and Western Sichuan Basin depression slope belt, which are favorable targets for large-scale reef flat karst reservoirs.

  12. Transformaciones de la política exterior egipcia en materia de seguridad, frente al Estado de Israel, desde la caída de Mubarak. 2002- 2012

    OpenAIRE

    Morales, Alejandra

    2015-01-01

    El presente estudio de caso identifica las transformaciones de la política exterior egipcia en materia de seguridad frente al Estado de Israel, desde la Caída de Mubarak. La hipótesis que sustenta este ejercicio académico repasa las principales transformaciones que ha sufrido la política exterior egipcia en términos de seguridad frente a Israel pasando por la seguridad fronteriza, las relaciones diplomáticas, y el cambio del discurso gubernamental hasta la incidencia y actual importancia de ...

  13. Proceso y resultados de las negociaciones comerciales de Brasil y Argentina frente al ALCA y la OMC a partir de los últimos recambios gubernamentales Lula-Kirchner

    OpenAIRE

    Cifuentes, Marina; Quintanar, Silvia

    2004-01-01

    Cuando asumió como presidente de Brasil Luiz Inácio Lula da Silva, el contexto negociador frente al ALCA no era favorable desde el punto de vista de Brasil y Argentina y estaba sujeto a un calendario que dejaba escaso margen para una eventual corrección de rumbos. El propósito de este trabajo es analizar los cambios en la estrategia de negociación de los dos principales socios del Mercosur -Argentina y Brasil- frente al ALCA y cómo ella se articula con otros escenarios de negociaciones comerc...

  14. Análise comparativa entre a refração clínica subjetiva e a automatizada obtida por sensor de frentes de onda

    OpenAIRE

    Freitas,Wilson de; Melo Júnior,Luiz Alberto Soares; Schor,Paulo; Campos,Mauro

    2007-01-01

    OBJETIVO: Avaliar e comparar os resultados obtidos da refração estática clínica com a obtida por sensor de frentes de onda. MÉTODOS: Estudo prospectivo, não seqüencial, de 279 olhos de 147 pacientes. Todos os pacientes foram examinados sob cicloplegia. Primeiro realizamos a refração clínica e a seguir a automatizada por sensor de frentes de onda. Os dados refracionais obtidos foram decompostos para análise vetorial. Foram analisados separadamente os dados de um olho por paciente e dos dois ol...

  15. Utilización de los equipos de protección individual frente al riesgo biológico por el personal sanitario

    OpenAIRE

    Angelina Constans Aubert; Rosa Mª Alonso Espadalé; Joaquín Pérez Nicolás

    2008-01-01

    El objetivo de este trabajo ha sido obtener información sobre el nivel de utilización de los equipos de protección individual (EPI) frente al riego biológico entre el personal que desarrolla su actividad profesional en centros sanitarios. Para ello se preparó un cuestionario, que previamente validado se aplicó a un colectivo de distintos centros sanitarios de Cataluña durante los años 2003/2004. La información obtenida en este estudio revela que la utilización de los EPI frente al riesgo biol...

  16. Reconfiguration Management in the Context of RTOS-Based HW/SW Embedded Systems

    Directory of Open Access Journals (Sweden)

    Eustache Yvan

    2008-01-01

    Full Text Available Abstract This paper presents a safe and efficient solution to manage asynchronous configurations of dynamically reconfigurable systems-on-chip. We first define our unified RTOS-based framework for HW/SW task communication and configuration management. Then three issues are discussed and solutions are given: the formalization of configuration space modeling including its different dimensions, the synchronization of configuration that mainly addresses the question of task configuration ordering, and the configuration coherency that solves the way a task accepts a new configuration. Finally, we present the global method and give some implementation figures from a smart camera case study.

  17. Reconfiguration Management in the Context of RTOS-Based HW/SW Embedded Systems

    Directory of Open Access Journals (Sweden)

    Yvan Eustache

    2008-01-01

    Full Text Available This paper presents a safe and efficient solution to manage asynchronous configurations of dynamically reconfigurable systems-on-chip. We first define our unified RTOS-based framework for HW/SW task communication and configuration management. Then three issues are discussed and solutions are given: the formalization of configuration space modeling including its different dimensions, the synchronization of configuration that mainly addresses the question of task configuration ordering, and the configuration coherency that solves the way a task accepts a new configuration. Finally, we present the global method and give some implementation figures from a smart camera case study.

  18. Extensional Tectonics of SW Anatolia In relation to Slab Edge Processes in the Eastern Mediterranean

    Science.gov (United States)

    Kaymakci, N.; Özacar, A.; Langereis, C. G.; Ozkaptan, M.; Koç, A.; Uzel, B.; Gulyuz, E.; Sözbilir, H.

    2017-12-01

    The tectonics of SW Anatolia is expressed in terms of emplacement of Lycian Nappes during the Eocene to Middle Miocene and synconvergent extension as part of the Aegean-West Anatolian extensional tectonic regime. Recent studies identified that there is a tear in the northwards subducting African Oceanic lithosphere along the Pliny-Strabo Trenches (PST). Such tears are coined as Subduction Transform-Edge Propagator (STEP) faults developed high angle to trenches. Hypothetically, the evolution of a STEP fault is somewhat similar to strike-slip fault zones and resultant asymmetric role-back of the subducting slab leads to differential block rotations and back arc type extension on the overriding plate. Recent studies claimed that the tear along the PST propagated NE on-land and developed Fethiye-Burdur Fault/Shear Zone (FBFZ) in SW Turkey. We have conducted a rigorous paleomagnetic study containing more than 3000 samples collected from 88 locations and 11700 fault slip data sets from 198 locations distributed evenly all over SW Anatolia spanning from Middle Miocene to Late Pliocene to test if FBFZ ever existed. The results show that there is slight (20°) counter-clockwise rotation distributed uniformly almost whole SW Anatolia and there is no change in the rotation senses and amounts on either side of the FBFZ implying no differential rotation within the zone. Additionally, constructed paleostress configurations, along the so-called FBFZ and within the 300 km diameter of the proposed fault zone, indicated that almost all the faults that are parallel to subparallel to the zone are almost pure normal faults similar to earthquake focal mechanisms suggesting active extension in the region. It is important to note that we have not encountered any significant strike-slip motion parallel to so-called "FBFZ" to support presence and transcurrent nature of it. On the contrary, the region is dominated by extensional deformation and strike-slip components are observed only on the

  19. Distributed power-law seismicity changes and crustal deformation in the SW Hellenic ARC

    Directory of Open Access Journals (Sweden)

    A. Tzanis

    2003-01-01

    Full Text Available A region of definite accelerating seismic release rates has been identified at the SW Hellenic Arc and Trench system, of Peloponnesus, and to the south-west of the island of Kythera (Greece. The identification was made after detailed, parametric time-to-failure modelling on a 0.1° square grid over the area 20° E – 27° E and 34° N–38° N. The observations are strongly suggestive of terminal-stage critical point behaviour (critical exponent of the order of 0.25, leading to a large earthquake with magnitude 7.1 ± 0.4, to occur at time 2003.6 ± 0.6. In addition to the region of accelerating seismic release rates, an adjacent region of decelerating seismicity was also observed. The acceleration/deceleration pattern appears in such a well structured and organised manner, which is strongly suggestive of a causal relationship. An explanation may be that the observed characteristics of distributed power-law seismicity changes may be produced by stress transfer from a fault, to a region already subjected to stress inhomogeneities, i.e. a region defined by the stress field required to rupture a fault with a specified size, orientation and rake. Around a fault that is going to rupture, there are bright spots (regions of increasing stress and stress shadows (regions relaxing stress; whereas acceleration may be observed in bright spots, deceleration may be expected in the shadows. We concluded that the observed seismic release patterns can possibly be explained with a family of NE-SW oriented, left-lateral, strike-slip to oblique-slip faults, located to the SW of Kythera and Antikythera and capable of producing earthquakes with magnitudes MS ~ 7. Time-to-failure modelling and empirical analysis of earthquakes in the stress bright spots yield a critical exponent of the order 0.25 as expected from theory, and a predicted magnitude and critical time perfectly consistent with the figures given above. Although we have determined an approximate location

  20. Sulfur and lead isotope characteristics of the Pontes e Lacerda gold deposits, SW Amazonian Craton Brazil

    International Nuclear Information System (INIS)

    Geraldes, M.C.; Tassinari, C.C.G.; Babinski; M; Iyer, S

    2001-01-01

    This work deals with the characterization of the S and Pb isotope signatures in sulfides from the Pontes e Lacerda mesothermal gold deposits located in the SW sector of Amazonian craton. Stable and radiogenic isotopes have played an important role in the study of ore deposited and hydrothermal processes and they are most useful when can be used together. The purpose of this study is to constrain the sources and the mechanisms of gold deposition in Pontes e Lacerda region which may be a helpful contribution to an exploratory model in the area (au)

  1. Ecosystem metabolism in a temporary Mediterranean marsh (Donana National Park, SW Spain)

    DEFF Research Database (Denmark)

    Geertz-Hansen, O.; Montes, C.; Duarte, C.M.

    2011-01-01

    metabolic balance of the open waters supporting submerged macrophytes of the Donana marsh (SW Spain) was investigated in spring, when community production is highest. The marsh community (benthic + pelagic) was net autotrophic with net community production rates averaging 0.61 g C m(-2) d(-1......), and gross production rates exceeding community respiration rates by, on average, 43%. Net community production increased greatly with increasing irradiance, with the threshold irradiance for communities to become net autotrophic ranging from 42 to 255 mu E m(-2) s(-1), with net heterotrophic at lower...

  2. Abnormal number cell division of human thyroid anaplastic carcinoma cell line, SW 1736

    Directory of Open Access Journals (Sweden)

    Keiichi Ikeda

    2015-12-01

    Full Text Available Cell division, during which a mother cell usually divides into two daughter cells during one cell cycle, is the most important physiological event of cell biology. We observed one-to-four cell division during imaging of live SW1736 human thyroid anaplastic carcinoma cells transfected with a plasmid expressing the hybrid protein of green fluorescent protein and histone 2B (plasmid eGFP-H2B. Analysis of the images revealed a mother cell divided into four daughter cells. And one of the abnormally divided daughter cells subsequently formed a dinucleate cell.

  3. The formation of lipid droplets favors intracellular Mycobacterium leprae survival in SW-10, non-myelinating Schwann cells.

    Science.gov (United States)

    Jin, Song-Hyo; An, Sung-Kwan; Lee, Seong-Beom

    2017-06-01

    Leprosy is a chronic infectious disease that is caused by the obligate intracellular pathogen Mycobacterium leprae (M.leprae), which is the leading cause of all non-traumatic peripheral neuropathies worldwide. Although both myelinating and non-myelinating Schwann cells are infected by M.leprae in patients with lepromatous leprosy, M.leprae preferentially invades the non-myelinating Schwann cells. However, the effect of M.leprae infection on non-myelinating Schwann cells has not been elucidated. Lipid droplets (LDs) are found in M.leprae-infected Schwann cells in the nerve biopsies of lepromatous leprosy patients. M.leprae-induced LD formation favors intracellular M.leprae survival in primary Schwann cells and in a myelinating Schwann cell line referred to as ST88-14. In the current study, we initially characterized SW-10 cells and investigated the effects of LDs on M.leprae-infected SW-10 cells, which are non-myelinating Schwann cells. SW-10 cells express S100, a marker for cells from the neural crest, and NGFR p75, a marker for immature or non-myelinating Schwann cells. SW-10 cells, however, do not express myelin basic protein (MBP), a marker for myelinating Schwann cells, and myelin protein zero (MPZ), a marker for precursor, immature, or myelinating Schwann cells, all of which suggests that SW-10 cells are non-myelinating Schwann cells. In addition, SW-10 cells have phagocytic activity and can be infected with M. leprae. Infection with M. leprae induces the formation of LDs. Furthermore, inhibiting the formation of M. leprae-induced LD enhances the maturation of phagosomes containing live M.leprae and decreases the ATP content in the M. leprae found in SW-10 cells. These facts suggest that LD formation by M. leprae favors intracellular M. leprae survival in SW-10 cells, which leads to the logical conclusion that M.leprae-infected SW-10 cells can be a new model for investigating the interaction of M.leprae with non-myelinating Schwann cells.

  4. The Effects of NDRG2 Overexpression on Cell Proliferation and Invasiveness of SW48 Colorectal Cancer Cell Line.

    Science.gov (United States)

    Golestan, Ali; Mojtahedi, Zahra; Ghalamfarsa, Ghasem; Hamidinia, Maryam; Takhshid, Mohammad Ali

    2015-09-01

    Colorectal cancer (CRC) is one of the most common causes of cancer-related death in the world. The expression of N-myc downstream-regulated gene 2 (NDRG2) is down-regulated in CRC. The aim of this study was to investigate the effect of NDRG2 overexpression on cell proliferation and invasive potential of SW48 cells. SW48 cells were transfected with a plasmid overexpressing NDRG2. After stable transfection, the effect of NDRG2 overexpression on cell proliferation was evaluated by MTT assay. The effects of NDRG2 overexpression on cell migration, invasion and cell motility and matrix metalloproteinase 9 (MMP9) activities were also investigated using matrigel transwell assay, wound healing assay and gelatin zymography, respectively. MTT assay showed that overexpression of NDRG2 caused attenuation of SW48 cell proliferation. Transwell and wound healing assay revealed that NDRG2 overexpression led to inhibition of migration, invasion, and motility of SW48 cells. The overexpression of NDRG2 also reduced the activity of secreted MMP-9. The results of this study suggest that NDRG2 overexpression inhibits proliferation and invasive potential of SW48 cells, which likely occurs via suppression of MMP-9 activity.

  5. Velocidade da frente de umidade em Neossolo Quartzarênico sob irrigação intermitente por gotejamento

    Directory of Open Access Journals (Sweden)

    Tarcizio Nascimento

    2013-08-01

    Full Text Available O trabalho foi realizado em um lisímetro de drenagem com dimensões de 100 cm de aresta, utilizando-se um solo tipo Neossolo Quartzarênico, com 94% de areia, 1% de silte e 5% de argila. Os testes foram realizados utilizando um volume de reposição, fixo de 8,0 L de água. As irrigações foram realizadas, utilizando-se um esquema fatorial de duas vazões (2,0; 4,0 L h-1 por quatro intermitências (uma, duas, três e sem intermitências. A velocidade da frente de umidade no solo irrigado com o emissor de 4,0 L h-1 foi, respectivamente, de 47,6; 39,2; 36,6; e 39,7 cm h-1 para irrigação sem, com uma, duas e com três intermitências. Com o emissor com 2,0 L h-1 a velocidade foi de 34,7; 25,1; 23,0 e 28,3 cm h-1. Nas irrigações realizadas com um emissor de vazão de 4,0 L h-1, a velocidade da frente de umidade sofreu um decréscimo de 17,65; 23,11 e 16,60%, entre as irrigações sem intermitência e as irrigações com uma, duas e três intermitências, respectivamente; e nas irrigações realizadas com emissores de vazão de 2,0 L h-1, houve um decréscimo de 27,67; 33,72 e 18,44%. A redução na velocidade da frente de umidade aumenta o tempo de oportunidade para extração da água pela cultura, aumentando a eficiência de uso da água, e reduzindo as perdas por percolação profunda.

  6. Susceptibility of some oral microorganisms to chlorhexidine and paramonochlorophenol Susceptibilidade de alguns microrganismos orais frente à clorexidina e ao paramonoclorofenol

    Directory of Open Access Journals (Sweden)

    Crystiane Venditi Gomes do Amorim

    2004-09-01

    Full Text Available Since the use of antimicrobial agents is required in endodontic therapies, this study aimed at determining the minimum inhibitory concentrations (MICs of chlorhexidine digluconate and paramonochlorophenol (PMC against microorganisms commonly found in endodontic infections. Both agents were tested by agar dilution tests against Pseudomonas aeruginosa, Staphylococcus aureus, Enterococcus faecalis, Escherichia coli, Candida albicans, Prevotella intermedia, Porphyromonas gingivalis, Porphyromonas endodontalis, Prevotella denticola and Prevotella melaninogenica. The MIC of chlorhexidine ranged from 2.67 to 80.00 µg/ml, and the MIC of PMC from 46.67 to 213.33 µg/ml. The highest MIC value of PMC was detected for E. faecalis whereas E. coli was the most susceptible microorganism to this agent. The highest MIC values of chlorhexidine were observed for P. aeruginosa whereas E. coli and P. denticola were the most susceptible microorganisms to this agent. Since the MIC values observed are much lower than the concentrations currently used in the endodontic therapy, it is suggested that both agents are effective in reducing the microbiota in the root canal.Tendo em vista a necessidade de se utilizarem agentes antimicrobianos durante a terapia endodôntica, o presente estudo tem por objetivo determinar as concentrações inibitórias mínimas (CIMs de digluconato de clorexidina e de paramonoclorofenol (PMC frente a cepas de microrganismos freqüentemente isolados dos canais radiculares infectados. Ambos os agentes foram testados por meio de testes de diluição em meio sólido contra Pseudomonas aeruginosa, Staphylococcus aureus, Enterococcus faecalis, Escherichia coli, Candida albicans, Prevotella intermedia, Porphyromonas gingivalis, Porphyromonas endodontalis, Prevotella denticola e Prevotella melaninogenica. As CIMs de clorexidina variaram de 2,67 a 80,00 µg/ml, e as CIMs de PMC variaram de 46,67 a 213,33 µg/ml. A maior CIM do paramonoclorofenol foi

  7. Revisiting platinum group elements of Late Permian coals from western Guizhou Province, SW China

    Energy Technology Data Exchange (ETDEWEB)

    Qi, Liang [State Key Lab of Ore Deposit Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang, 550002 (China); Gao, Jianfeng [Department of Earth Sciences, The University of Hong Kong, Pokfulam Road, Hong Kong SAR (China)

    2008-08-05

    Twenty five coal samples from the Late Permian coal-bearing strata in Weining, Nayong, and Zhijin, western Guizhou Province, SW, China, were analyzed for platinum group elements (PGEs). The coal ashes were digested by the Carius tube technique and accurately measured by isotope dilution-inductively coupled plasma mass spectrometry (ID-ICP-MS) for all PGEs. The results are much lower than the previous reported values. Our study suggested that the previously reported PGE values are incorrect and may due to the polyatomic interferences in ICP-MS measurements. In our study, samples from the Weining coalfield have the lowest PGE contents (from 0.019 Ir to 0.42 ng/g Pd), which represent the PGE background value in coal in western Guizhou province. Some of the coals have Pt and Pd contents about 20-times higher than the background value, indicating PGEs are concentrated. We also reported new and reliable PGE data and background value of coal in western Guizhou province, SW, China, and suggested to rework the PGE background values of Chinese coals. (author)

  8. Anticonvulsant effect of the ethanol extract of Caesalpiniapulcherrima (L. Sw., Fabaceae, leaves

    Directory of Open Access Journals (Sweden)

    Dinesh Kumar

    2010-08-01

    Full Text Available In this study, ethanol extract of Caesalpinia pulcherrima (L. Sw., Fabaceae, leaves (CPEE was investigated for anticonvulsant effect against maximal electroshock (MES and pentylenetetrazole (PTZ induced seizures in rats and mice at dose levels 200 and 400 mg/kg, i.p. respectively. Diazepam (3 mg/kg, i.p. was used as a standard anticonvulsant drug for comparison. CPEE was found to be safe up to the dose of 4000 mg/kg in mice, when administered intraperitoneally. The extract at 400 mg/kg dose produced significant (p<0.01 anticonvulsant effect w.r.t. control against PTZ-induced clonic seizures. In MES-induced seizure model, there were no significant alterations in the onset as well as duration of hind limb extension seizures as compared to control at a dose of 200 mg/kg when administered intraperitoneally. However, the extract (CPEE, 400 mg/kg i.p. significantly (p<0.01 delayed the onset as well as decreased the duration of hind limb extension seizures (HLES as compared to control. However, the extract, CPEE, percentage protection of the animals was increased at higher dose (200 mg/kg in both the models. The results of the study suggest that ethanol extract of Caesalpinia pulcherrima (L. Sw. leaves possess anticonvulsant effect.

  9. Dynamics of root and leaf decomposition in chronosequence of rubber plantation (Hevea brasilensis) in SW China

    International Nuclear Information System (INIS)

    Moazzam, N.S.; Yiping, Z.; Liqing, S.; Moazzam, N.S.

    2018-01-01

    This study highlighted the dynamics of stand parameters as well as root and leaf litter decomposition in the chronosequence (49, 32, 24 and 12 years old plantations established in the year 1965, 1982, 1990 and 2002) of the rubber plantation in Xishuangbanna SW China. Litter trappers were installed on the study site to collect the leaf litter and litter bag experiment was carried out to investigate the rate of root and leaf litter decomposition. The study revealed significant variation of stand characteristics during the decomposition process. The monthly litter fall and root biomass (all categories; kg m-3) showed positive correlation with stand characteristics and age. Remaining leaf litter mass % in the litter bags reduced with the passage of time and was significantly different in the chronosequence. The highest root decomposition rate (55%) was shown by fine roots and minimum (32%) by coarse roots during the study period. The investigations on elemental composition of the leaf and root provides basic important information for rate of nutrient cycle along with decomposition rate in rubber plantation and result are quite helpful for simulating the below ground carbon stock of rubber plantation in SW China. (author)

  10. Photometry of the SW Sextantis-type nova-like BH Lyncis in high state

    Science.gov (United States)

    Stanishev, V.; Kraicheva, Z.; Genkov, V.

    2006-08-01

    Aims.We present a photometric study of the deeply eclipsing SW Sex-type nova-like cataclysmic variable star BH Lyn. Methods: .Time-resolved V-band CCD photometry was obtained for seven nights between 1999 and 2004. Results: .We determined 11 new eclipse timings of BH Lyn and derived a refined orbital ephemeris with an orbital period of 0.155875577(14) °. During the observations, BH Lyn was in high-state with V≃15.5 mag. The star presents ~1.5 mag deep eclipses with mean full-width at half-flux of 0.0683(±0.0054)P_orb. The eclipse shape is highly variable, even changing form cycle to cycle. This is most likely due to accretion disc surface brightness distribution variations, most probably caused by strong flickering. Time-dependent accretion disc self-occultation or variations of the hot spot(s) intensity are also possible explanations. Negative superhumps with period of ˜0.145 ° are detected in two long runs in 2000. A possible connection between SW Sex and negative superhump phenomena through the presence of tilted accretion disc is discussed, and a way to observationally test this is suggested.

  11. Production, purification and characterization of an exo-polygalacturonase from Penicillium janthinellum sw09

    Directory of Open Access Journals (Sweden)

    YUPING MA

    2016-01-01

    Full Text Available ABSTRACT A soil isolate, Penicillium janthinellum sw09 has been found to produce significant amounts of an extracellular pectinase subsequently characterized as exo-polygalacturonase (exo-PG. By optimizing growth conditions, P. janthinellum sw09 produced high amount of exo-PG (16.54 units/mL. The crude enzyme was purified by gel filtration chromatography and two exo-PG activity peaks (designated as PGI and PGII were revealed. On SDS-PAGE analysis, purified PGII using DEAE-Sepharose FF column, was found to be a single band with a molecular mass of 66.2 kDa. The purified PGII exhibited maximal activity at the temperature of 45 oC and pH 5.0. The stability profiles show that PGII is more stable in the pH range of 4.0-8.0 and below 60 oC. The Km and Vmax for the enzyme was 1.74 mg/mL and 18.08 μmol/ (mL•min, respectively. Due to this enzymatic characterization, this pectinase is an attractive candidate for applications in degradation of pectin.

  12. Ostreid herpesvirus in wild oysters from the Huelva coast (SW Spain).

    Science.gov (United States)

    López-Sanmartín, M; López-Fernández, J R; Cunha, M E; De la Herrán, R; Navas, J I

    2016-08-09

    This is the first report of ostreid herpesvirus 1 microvariant (OsHV-1 µVar) infecting natural oyster beds located in Huelva (SW Spain). The virus was detected in 3 oyster species present in the intertidal zone: Crassostrea gigas (Thunberg, 1793), C. angulata (Lamarck, 1819) and, for the first time, in Ostrea stentina Payraudeau, 1826. Oysters were identified by a specific polymerase chain reaction (PCR) and posterior restriction fragment length polymorphism (RFLP) analysis based on cytochrome oxidase I (COI) mitochondrial DNA. Results confirmed that C. angulata still remains the dominant oyster population in SW Spain despite the introduction of C. gigas for cultivation in the late 1970s, and its subsequent naturalization. C. angulata shows a higher haplotype diversity than C. gigas. OsHV-1 virus was detected by PCR with C2/C6 pair primers. Posterior RFLP analyses with the restriction enzyme MfeI were done in order to reveal the OsHV-1 µVar. Detections were confirmed by DNA sequencing, and infections were evidenced by in situ hybridization in C. gigas, C. angulata and O. stentina samples. The prevalence was similar among the 3 oyster species but varied between sampling locations, being higher in areas with greater harvesting activities. OsHV-1 µVar accounted for 93% of all OsHV-1 detected.

  13. Echinacoside Induces Apoptosis in Human SW480 Colorectal Cancer Cells by Induction of Oxidative DNA Damages

    Directory of Open Access Journals (Sweden)

    Liwei Dong

    2015-06-01

    Full Text Available Echinacoside is a natural compound with potent reactive oxygen species (ROS-scavenging and anti-oxidative bioactivities, which protect cells from oxidative damages. As cancer cells are often under intense oxidative stress, we therefore tested if Echinacoside treatment would promote cancer development. Surprisingly, we found that Echinacoside significantly inhibited the growth and proliferation of a panel of cancer cell lines. Treatment of the human SW480 cancer cells with Echinacoside resulted in marked apoptosis and cell cycle arrest, together with a significant increase in active caspase 3 and cleaved PARP, and upregulation of the G1/S-CDK blocker CDKN1B (p21. Interestingly, immunocytochemistry examination of drug-treated cancer cells revealed that Echinacoside caused a significant increase of intracellular oxidized guanine, 8-oxoG, and dramatic upregulation of the double-strand DNA break (DSB-binding protein 53BP1, suggesting that Echinacoside induced cell cycle arrest and apoptosis in SW480 cancer cells via induction of oxidative DNA damages. These results establish Echinacoside as a novel chemical scaffold for development of anticancer drugs.

  14. Crustal structure of the SW Iberian passive margin: The westernmost remnant of the Ligurian Tethys?

    Science.gov (United States)

    Ramos, A.; Fernández, O.; Torne, M.; Sánchez de la Muela, A.; Muñoz, J. A.; Terrinha, P.; Manatschal, G.; Salas, M. C.

    2017-05-01

    At present, the SW Iberian margin is located along the convergent Iberia-Nubia plate boundary. In Mesozoic times, the margin was located at the triple junction of the Ligurian Tethys, Central Atlantic and Northern Atlantic. The characterization of its crustal structure has allowed us to propose a configuration for this triple junction and to determine the role that this transform margin played within the plate kinematic system. In this paper we present an integrated study based on the interpretation of a 2D regional multichannel seismic survey consisting of 58 profiles, tied with onshore geology and exploratory wells, and on gravimetric modeling performed over four NW-SE trending profiles. Integrated interpretation of MCS data combined with 2D gravity modeling reveals a complex pattern in the southward crustal thinning of SW Iberia and supports the possible presence of oceanic crust under the Gulf of Cadiz. The tapering of Iberian crust is characterized by steps with rapid changes in the thickness of the crust, and thinning to Bank. Margin inversion and the pre-existing extensional crustal structure are responsible for the areal distribution and amplitude of the prominent positive gravity anomaly observed in the Gulf of Cadiz.

  15. The prevalence of Anaplasma phagocytophilum in questing Ixodes ricinus ticks in SW Poland.

    Science.gov (United States)

    Kiewra, Dorota; Zaleśny, Grzegorz; Czułowska, Aleksandra

    2014-01-01

    Ticks constitute important vectors of human and animal pathogens. Besides the Lyme borreliosis and tick-borne encephalitis, other pathogens such as Babesia spp., Rickettsia spp., and Anaplasma phagocytophilum, are of increasing public health interest. In Poland, as in other European countries, Ixodes ricinus, the most prevalent tick species responsible for the majority of tick bites in humans, is the main vector of A. phagocytophilum. The aim of the study was to estimate the infection level of I. ricinus with A. phagocytophilum in selected districts, not previously surveyed for the presence of this agent. Sampling of questing ticks was performed in 12 forested sites, located in four districts (Legnica, Milicz, Lubań, and Oława) in SW Poland. Altogether, 792 ticks (151 females, 101 males, and 540 nymphs) representing I. ricinus were checked for the presence of A. phagocytophilum. The average infection level was 4.3%, with higher rate reported for adult ticks. The highest percentage of infected adults was observed in Milicz (17.4%) and the lowest in Oława (6.8%). The abundance of questing I. ricinus in all examined sites as well as the infection with A. phagocytophilum indicate for the first time the risk for HGA transmission in SW Poland.

  16. Alfinated coating structure on HS6-5-2 (SW7M high speed steel

    Directory of Open Access Journals (Sweden)

    T. Szymczak

    2010-10-01

    Full Text Available The paper presents the results of immersion alfinated coating structure in AlSi5 silumin on HS6-5-2 (SW7M high speed steel. Alfinating bath temperature was 750 ± 5 ° C, time of sample immersion was τ = 180s. Thickness of obtained coating under specified conditions was g = 150μm. Manufactured coating consists of three layers of different construction phase. The first layer from the substrate „g1`” constructed with a AlFe phase consist of alloy additives constituents of HS6-5-2 (SW7M steel: W, Mo, V, Cr and Si. On it crystallizes the second layer „g1``” of AlFeWMoCr intermetallic phases also containing Si and small amount of V. Last, the outer layer „g2” of the coating is composed with silumin including AlFeWMoCrVSi intermetallic phases. Within all layers of the coating occurs carbides. Penetration of carbides to individual coating layers is mainly due to steel surface partial melting and crystallizing layers „g1`” and „g1``” by alfinating liquid and shifting into her of carbides as well as partial carbides rejection by crystallization front of intermetallic phases occurs in coating.

  17. Regional forecast model for the Olea pollen season in Extremadura (SW Spain)

    Science.gov (United States)

    Fernández-Rodríguez, Santiago; Durán-Barroso, Pablo; Silva-Palacios, Inmaculada; Tormo-Molina, Rafael; Maya-Manzano, José María; Gonzalo-Garijo, Ángela

    2016-10-01

    The olive tree ( Olea europaea) is a predominantly Mediterranean anemophilous species. The pollen allergens from this tree are an important cause of allergic problems. Olea pollen may be relevant in relation to climate change, due to the fact that its flowering phenology is related to meteorological parameters. This study aims to investigate airborne Olea pollen data from a city on the SW Iberian Peninsula, to analyse the trends in these data and their relationships with meteorological parameters using time series analysis. Aerobiological sampling was conducted from 1994 to 2013 in Badajoz (SW Spain) using a 7-day Hirst-type volumetric sampler. The main Olea pollen season lasted an average of 34 days, from May 4th to June 7th. The model proposed to forecast airborne pollen concentrations, described by one equation. This expression is composed of two terms: the first term represents the resilience of the pollen concentration trend in the air according to the average concentration of the previous 10 days; the second term was obtained from considering the actual pollen concentration value, which is calculated based on the most representative meteorological variables multiplied by a fitting coefficient. Due to the allergenic characteristics of this pollen type, it should be necessary to forecast its short-term prevalence using a long record of data in a city with a Mediterranean climate. The model obtained provides a suitable level of confidence to forecast Olea airborne pollen concentration.

  18. COMPORTAMIENTO DEL CRECIMIENTO EN ALTURA DE Hibiscus elatus Sw CULTIVADA EN CONTENEDORES

    Directory of Open Access Journals (Sweden)

    M. Cobas-López

    2003-01-01

    Full Text Available Hibiscus elatus Sw. (majagua es una especie nativa de Cuba, incluida en los planes de reforestación del país por su importancia económica, ecológica y su condición de ser una madera preciosa. En el trabajo se describe el comportamiento en vivero del crecimiento en altura de la especie, cultivada en contenedores. Se utilizaron cuatro tipos de sustratos, que fueron los siguientes: S1- Turba (40 %, humus de lombriz (40 % y corteza de pino compostada (20 %; S2- Estiércol de caballo (45 %, composta (40 %, y humus de lombriz (15 %; S3- Humus de lombriz (30 %, composta (25 %, turba (25 %, y estiércol de caballo (20 %; S4- Testigo, consistente en suelo proveniente de una plantación de la especie. A través del análisis de regresión se probaron nueve modelos matemáticos del tipo y = f (x, polinómicos, exponenciales y logarítmicos. De acuerdo con el coeficiente de determinación obtenido, del análisis de residuos y la validación de los modelos, se comprobó que la función que mejor representa el crecimiento en altura de Hibiscus elatus Sw., para los sustratos estudiados fue b t y b e 1 = 0 + .

  19. KRAS exon 2 mutations influence activity of regorafenib in an SW48-based disease model of colorectal cancer.

    Science.gov (United States)

    Camaj, Peter; Primo, Stefano; Wang, Yan; Heinemann, Volker; Zhao, Yue; Laubender, Ruediger Paul; Stintzing, Sebastian; Giessen-Jung, Clemens; Jung, Andreas; Gamba, Sebastian; Bruns, Christiane Josephine; Modest, Dominik Paul

    2015-01-01

    To investigate the impact of KRAS mutation variants on the activity of regorafenib in SW48 colorectal cancer cells. Activity of regorafenib was evaluated in isogenic SW48 KRAS wild-type (WT) and mutant cells. Subcutaneous xenografts (KRAS WT and G12C mutant variants) in NOD/SCID mice were analyzed to elucidate the effect of regorafenib treatment in vivo. Compared with KRAS WT cells, all mutant variants seemed associated with some degree of resistance to regorafenib-treatment in vitro. In vivo, activation of apoptosis (TUNEL) and reduction of proliferation (Ki67) after treatment with regorafenib were more pronounced in KRAS WT tumors as compared with G12C variants. In SW48 cells, exon 2 mutations of the KRAS gene may influence antitumor effects of regorafenib.

  20. A HW-SW Co-Designed System for the Lunar Lander Hazard Detection and Avoidance Breadboarding

    Science.gov (United States)

    Palomo, Pedro; Latorre, Antonio; Valle, Carlos; Gomez de Aguero, Sergio; Hagenfeldt, Miguel; Parreira, Baltazar; Lindoso, Almudena; Portela, Marta; Garcia, Mario; San Millan, Enrique; Zharikov, Yuri; Entrena, Luis

    2014-08-01

    This paper presents the HW-SW co-design approach followed to tackle the design of the Hazard Detection and Avoidance (HDA) system breadboarding for the Lunar Lander ESA mission, undertaken given the fact that novel GNC technologies used to promote autonomous systems demand processing capabilities that current (and forthcoming) space processors are not able to satisfy. The paper shows how the current system design has been performed in a process in which the original HDA functionally validated design has been partitioned between SW (deemed for execution in a microprocessor) and HW algorithms (to be executed in an FPGA), considering the performance requirements and resorting to a deep analysis of the algorithms in view of their adequacy to HW or SW implementation.

  1. Detection of Cytotoxic Activity of Lectin on Human Colon Adenocarcinoma (Sw480 and Epithelial Cervical Carcinoma (C33-A

    Directory of Open Access Journals (Sweden)

    Mirandeli Bautista

    2011-03-01

    Full Text Available Lectins comprise a heterogeneous class of proteins that recognize the carbohydrate moieties of glycoconjugates with high specificity. Numerous studies have shown that lectins are capable of recognizing specific carbohydrate moieties displayed by malignant cells or tissues. The present work was performed to investigate the effects of tepary bean (Phaseolus acutifolius lectins on proliferation, colony formation, and alteration of DNA synthesis of human malignant cells. Tepary bean lectin showed dose dependent  effects on the inhibition of viability as well as on colony formation in two human malignant cells lines (C33-A, Sw480; By contrast, tepary bean lectin only showed significant effects on DNA synthesis on Sw480 cells. Our results provide evidence of the anti- proliferative and cytotoxic effects of the tepary bean lectins on C33-A and Sw480 cells lines.

  2. "Las cooperativas: una alternativa económica y social frente a la crisis" (Cooperatives: an economic and social alternative to the crisis

    Directory of Open Access Journals (Sweden)

    Javier Divar Garteiz-Aurrecoa

    2013-01-01

    Full Text Available El Cooperativismo nació como alternativa económica y social,impulsado por la piedad religiosa y reglado bajo los principios democráticos. Lasolidaridad y la democracia económica hacen de las cooperativas sociedadesespecialmente resistentes frente a las dificultades económicas.

  3. Frente de pesquisa de títulos de livros: um estudo aplicado no campo da Educação Indígena

    Directory of Open Access Journals (Sweden)

    Alexandre Masson Maroldi

    2017-12-01

    Full Text Available Derek de Solla Price pode ser considerado um dos mais importantes pesquisadores dos estudos métricos. Entre suas inúmeras contribuições ao campo da cientometria, destaca-se o conceito de frente de pesquisa que é composto pelo conjunto de autores mais citados em um determinado campo do conhecimento. O objetivo desse trabalho é, a partir da ideia original de Price, identificar a frente de pesquisa de títulos de livros e de autores citados em teses e dissertações defendidos entre 2001 e 2016 no campo de pesquisa da Educação Indígena. Os resultados apontaram que o livro de Clifford Geertz, A interpretação das culturas é o título mais citado, enquanto que o autor Paulo Freire lidera a frente de pesquisa da literatura citada. Esses resultados dessas duas frentes de pesquisa demonstram que ambos os cálculos são complementares e permitem compreender melhor a configuração da literatura científica que embasa as pesquisas no subcampo da educação indígena.

  4. Estudo de viabilidade econômica do concreto auto-adensável frente ao concreto convencional

    OpenAIRE

    Calado, Carlos; Camões, Aires; Jalali, Said; Barkokébas, Béda

    2016-01-01

    A pesquisa buscou demonstrar a viabilidade econômica do CAA frente ao CC através do estudo de custo em laboratório de uma composição de CAA e uma de CC, representativas de composições aplicadas na região do Recife, com mesmo fck e igual a 40 MPa e mesma relação água/ligante de 0,45 (CAA-Lab e CC-Lab). Também se buscou estudar o custo de uma composição de CAA e outra de CC aplicadas em um caso real de obra inaugurada em 2013 (CAA-Obra e CC-Obra), com mesmo fck e igual a 40 MPa e mesma relação ...

  5. Algunos límites de las respuestas frente a la violencia y la inseguridad, en las instituciones educativas

    Directory of Open Access Journals (Sweden)

    Alfredo Manuel Ghiso

    2012-01-01

    Full Text Available Todas las violencias del entorno afectan las condiciones de convivencia y aprendizaje; .aunque no toda inseguridad o amenaza puede rotularse como "violencia escolar". Esta realidad se torna más compleja y relevante ante la pérdida de confianza mutua entre la institución educativa y la familia, que han dejado de ser instancias referenciales, simbólicas y disciplinadoras ante la inseguridad y la violencia. Cuando esto sucede, los sujetos jóvenes y adolescentes rompen los frágiles lazos con la institución educativa y se convierten en seres ocultos, sólo visibles en escenas de violencia etiquetadas por los medios de comunicación masiva; mientras las escuelas siguen aisladas, configurando institucionalidades centradas en demandas tecno-burocráticas, incapacitadas para leer críticamente diferentes situaciones de violencia y modos de actuar frente a ellas.

  6. ¿ESTÁ PREPARADA NUESTRA ORGANIZACIÓN PARA HACER FRENTE A LOS RETOS DE LA INNOVACIÓN?

    Directory of Open Access Journals (Sweden)

    Sabin Azua

    2007-07-01

    Full Text Available Estamos asistiendo a una auténtica competición para distinguir las organizaciones con base en su nivel de innovación. Aún cuando el concepto no está suficientemente claro y todos tenemos una percepción diferente sobre su significado y sus repercusiones sobre la forma de gestionar nuestras organizaciones, nos hemos instalado en una dinámica tendiente a favorecer la generación de entidades más creativas, que buscan elementos de diferenciación frente a sus competidores y, que hacen de la exploración uno de los principales mecanismos de gestión.

  7. Nuevo registro del loro frente blanca (Amazona albifrons para la Isla de Cozumel, Quintana Roo, México

    Directory of Open Access Journals (Sweden)

    Alexis Herminio Plasencia Vázquez

    2012-01-01

    Full Text Available Reportamos, por primera vez en la literatura científica, al loro frente blanca (Amazona albifrons como especie introducida en áreas urbanas de la Isla de Cozumel, Quintana Roo, durante el trabajo de campo realizado en el mes de abril de 2011. Su presencia sólo en áreas urbanas de la isla, la capacidad de la especie para poder vivir con éxito en áreas urbanas, la abundancia de árboles frutales y su uso como mascota por los isleños nos permite sugerir que los individuos registrados son resultado de escapes o fueron liberados por sus dueños. Es probable que las condiciones sean favorables para el establecimiento de una población dentro del poblado de San Miguel de Cozumel, lo que debe monitorearse en el futuro.

  8. Algunos límites de las respuestas frente a la violencia y la inseguridad, en las instituciones educativas

    Directory of Open Access Journals (Sweden)

    Alfredo Manuel Ghiso

    2012-09-01

    Full Text Available Todas las violencias del entorno afectan las condiciones de convivencia yaprendizaje; .aunque no toda inseguridad o amenaza puede rotularse como “violencia escolar”. Estarealidad se torna más compleja y relevante ante la pérdida de confianza mutua entre la institucióneducativa y la familia, que han dejado de ser instancias referenciales, simbólicas y disciplinadorasante la inseguridad y la violencia.Cuando esto sucede, los sujetos jóvenes y adolescentes rompen los frágiles lazos con lainstitución educativa y se convierten en seres ocultos, sólo visibles en escenas de violencia etiquetadaspor los medios de comunicación masiva; mientras las escuelas siguen aisladas, configurandoinstitucionalidades centradas en demandas tecno-burocráticas, incapacitadas para leer críticamentediferentes situaciones de violencia y modos de actuar frente a ellas.

  9. Discriminación laboral y vulnerabilidad de las mujeres frente a la crisis mundial en México

    Directory of Open Access Journals (Sweden)

    Jorge E. Horbath

    2014-01-01

    Full Text Available Los profundos cambios en la relación entre capital y trabajo producidos a partir de la emergencia de un nuevo régimen mundial de acumulación no han tenido los mismos impactos en la fuerza de trabajo masculina y femenina. En esta investigación nos adentramos en las distintas manifestaciones de la discriminación laboral hacia las mujeres en México y mostramos su magnitud y tendencia expresada, entre otros indicadores, por la diferencia en el ingreso que éstas perciben en el mercado de trabajo asalariado y por su alta exposición al despido frente a la crisis mundial iniciada en 2008.

  10. Estudio del comportamiento a flexión de ejes con fisuras de frente semielíptico

    OpenAIRE

    Ruiz Ayuso, María

    2010-01-01

    En el presente Proyecto se pretende estudiar el comportamiento a flexión bajo cargas estáticas de ejes con fisuras de frente semielíptico. Este estudio se realizará de manera numérica y se validará de forma analítica. En todos los casos se calculará la deformada del eje y posteriormente se analizarán los resultados obtenidos. Se ha desarrollado la formulación analítica que relaciona la deformada de un eje fisurado con la geometría (forma y tamaño) de la fisura, para la condición de apoyo biap...

  11. Representaciones sociales de un grupo de estudiantes universitarios frente a un acto terrorista en Bogotá

    Directory of Open Access Journals (Sweden)

    Vanessa Sánchez

    2007-01-01

    Full Text Available El objetivo de este estudio fue conocer las representaciones sociales de un grupo de 20 jóvenes universitarios frente al atentado con carro bomba ocurrido el 19 de Octubre del 2006 en la Escuela Superior de Guerra del Ejército Nacional ubicada en la ciudad de Bogotá. Para ello se aplicó una entrevista estructurada conformada por tres preguntas abiertas con el fin de conocer las representaciones de jóvenes universitarios pertenecientes a dos universidades diferentes: Universidad Militar Nueva Granada y Universidad Católica de Colombia. El análisis cualitativo de los datos evidencia la emergencia de categorías de análisis tales como: atribución de responsabilidad, vivencia del atentado y acciones preventivas en la representación del atentado.

  12. Perturbative determination of c{sub sw} for plaquette and Symanzik gauge action and stout link clover fermions

    Energy Technology Data Exchange (ETDEWEB)

    Horsley, R. [Edinburgh Univ. (United Kingdom). School of Physics; Perlt, H.; Schiller, A. [Leipzig Univ. (Germany). Inst. fuer Theoretische Physik; Rakow, P.E.L. [Liverpool Univ. (United Kingdom). Theoretical Physics Division, Dept. of Mathematical Sicences; Schierholz, G. [Deutsches Elektronen-Synchrotron (DESY), Hamburg (Germany)

    2008-06-15

    Using plaquette and Symanzik improved gauge action and stout link clover fermions we determine the improvement coefficient c{sub SW} in one-loop lattice perturbation theory from the off-shell quark-quark-gluon three-point function. In addition, we compute the coefficients needed for the most general form of quark field improvement and present the one-loop result for the critical hopping parameter {kappa}{sub c}. We discuss mean field improvement for c{sub SW} and {kappa}{sub c} and the choice of the mean field coupling for the actions we have considered. (orig.)

  13. Obesity, overweight, screen time and physical activity in Mexican adolescents Obesidad, sobrepeso, tiempo frente a la pantalla y actividad física en adolescentes mexicanos

    Directory of Open Access Journals (Sweden)

    María del Carmen Morales-Ruán

    2009-01-01

    Full Text Available OBJECTIVE: To determine whether screen time and physical activity is related to overweight or obesity in adolescents. MATERIAL AND METHODS: Cross-sectional design. Adolescents aged 10 to 19 were included in the Mexican National Health and Nutrition Survey 2006 (ENSANUT 2006. The dependent variable was overweight or obesity; the independent variable was screen time. A logistic regression model was created to estimate the relationship of overweight and obesity to various factors, including screen time, physical activity, study vs. no study, age, sex, indigenous ethnicity, alcohol consumption and tobacco use. RESULTS: A total of 18 784 adolescents were included. A positive relation between screen time and overweight and obesity was found. CONCLUSIONS: Screen time is associated with overweight and obesity in Mexican adolescents.OBJETIVO: Determinar si el tiempo que los adolescentes permanecen frente a pantalla y realizan actividad física se asocia con el sobrepeso o la obesidad. MATERIAL Y MÉTODOS: Diseño transversal. Se incluyeron adolescentes de 10 a 19 años de edad, de la Encuesta Nacional de Salud y Nutrición 2006 (ENSANUT 2006. La variable dependiente fue el sobrepeso u obesidad y la independiente el tiempo frente a la pantalla. Se ajustó un modelo de regresión logística para estimar la relación entre el sobrepeso u obesidad con el tiempo frente a la pantalla, actividad física, edad, sexo, condición de estudiante, indigenismo, tabaquismo y consumo de alcohol. RESULTADOS: Se estudió a 18 784 adolescentes. Se encontró una asociación positiva entre el tiempo frente a pantalla y el sobrepeso u obesidad. CONCLUSIONES: El tiempo que los adolescentes mexicanos pasan frente a pantalla está asociado con el sobrepeso u obesidad.

  14. Classicação Sinótica de Frentes Frias Associadas a Chuvas Extremas no Leste de Santa Catarina (SC

    Directory of Open Access Journals (Sweden)

    Gustavo C.J. Escobar

    Full Text Available Resumo O trabalho apresenta uma classificação sinótica de frentes frias sobre o leste do Estado de Santa Catarina (SC, com o propósito de identificar os principais padrões sinóticos associados com chuvas extremas na região do Vale do Itajaí. A metodologia utilizada foi a técnica de Análise de Componentes Principais aplicada à série de reanálises do Climate Forecast System Reanalysis (CFSR (NCEP para o período 1979-2010. Previamente, realiza-se uma climatologia de frentes frias sobre o leste de SC, cujos resultados mostram uma maior frequência de frentes frias associadas a chuvas extremas no Vale do Itajaí durante a primavera. Os resultados fornecem cinco padrões sinóticos principais que representam 83,4% dos casos de frentes frias com chuvas extremas no Vale do Itajaí. O padrão sinótico mais frequente mostra um intenso fluxo de quadrante sudeste sobre a região de estudo, determinado pela presença de um forte anticiclone pós-frontal observado sobre o sul da Província de Buenos Aires, cuja frente fria associada encontra-se no extremo nordeste catarinense. Por último, há dois padrões sinóticos típicos de verão relacionados com chuvas extremas no Vale do Itajaí; um relacionado com episódios de Zona de Convergência do Atlântico Sul (ZCAS e outro associado com a Baixa do Chaco (BCH.

  15. USB HW/SW Co-Simulation Environment with Custom Test Tool Integration

    Directory of Open Access Journals (Sweden)

    Grigor Y. Zargaryan

    2014-06-01

    Full Text Available This paper describes a new verification environment for USB 2.0 controller. New methodology is presented, where a co-simulation environment is used as one of the starting points for the embedded hardware/software development and as an accelerator of the overall design process. The verification environment is based on the device emulation/virtualization technique, using USB controller’s real register transfer level (RTL instead of models. This approach is functionally very close to the corresponding real-world devices and allows wider opportunities for hardware debugging. The new software utilities for USB host and device functionality testing are also presented. This tool allows generating custom tests by including various transfer types and modifying parameters such as data payload, interval, number of pipes, etc. It can be used for both hardware (HW and software (SW limitations characterization, as well as debugging.

  16. Comportement de Stylosanthes guianensis (Aubl. Sw. dans la basse Ruzizi et le Mosso (Burundi

    Directory of Open Access Journals (Sweden)

    Vancoppenolle, R.

    1984-01-01

    Full Text Available Requirements of Stylosanthes guianensis (Aubl Sw in lower Ruzizi and Mosso (Burundi. This paper describes the requirements of Stylosanthes guianensis in two ecological regions : Mosso (1 280 m alt. and lower Ruzizi (800 m alt.. This legume was introduced in 1953 into the grasslands of the east and in 1970 into lower Ruzizi, with the aim of improving the value of the natural pastures using leguminous plants. At Mosso, soil and climatic conditions were favourable for Stylosanthes and it grew well. However, since 1981. Anthracnose has severely reduced its growth and until a solution is found its general introduction will not be possible. In lower Ruzizi plant development was limited by low rainfall (670, 4 mm per year and soils with a low water retention capacity (sand dunes. For this region, it is necessary to identify cultivars resistant to drought and devise a method of establishing these cultivars on sand dunes.

  17. Monitoring physical properties of a submarine groundwater discharge source at Kalogria Bay, SW Peloponnissos, Greece

    Directory of Open Access Journals (Sweden)

    Papathanassiou E.

    2012-04-01

    Full Text Available An impressive SGD in Kalogria Bay (SW Peloponnissos was surveyed for the first time in 2006, revealing the existence of 2 major and 2 minor point sources of freshwater (salinity ~l-2; the discharge was ~ 1000 m3 h−1. The major point source was located in a karstic cavity at 25 m depth. In July 2009, and for a period of one year, the site was monitored intensively. During summer, the underwater discharge was not very strong, the water was flowing from many dispersed points, and salinity range was 20–36. During autumn and winter, flow velocity increased considerably (> 1 m s−1, and the SGDs discharged water of low salinity (< 2. Gradually, the smaller SGDs ceased their operation, and the major SGD emanated brackish water during spring and summer, thus hampering the possibilities of freshwater exploitation, in a touristic area which suffers from great aridity and water demand is high during summer.

  18. Neogene to recent contraction and basin inversion along the Nubia-Iberia boundary in SW Iberia

    Science.gov (United States)

    Ramos, Adrià; Fernández, Oscar; Terrinha, Pedro; Muñoz, Josep Anton

    2017-02-01

    The SW of Iberia is currently undergoing compression related to the convergence between Nubia and Iberia. Multiple compressive structures, and their related seismic activity, have been documented along the diffuse Nubia-Iberia plate boundary, including the Gorringe bank west of the Gulf of Cadiz, and the Betic-Rif orogen to the east. Despite seismic activity indicating a dominant compressive stress along the Algarve margin in the Gulf of Cadiz, the structures at the origin of this seismicity remain elusive. This paper documents the contractional structures that provide linkage across the Gulf of Cadiz and play a major role in defining the present-day seismicity and bathymetry of this area. The structures described in this paper caused the Neogene inversion of the Jurassic oblique passive margin that formed between the central Atlantic and the Ligurian Tethys. This example of a partially inverted margin provides insights into the factors that condition the inversion of passive margins.

  19. JVLA observations of IC 348 SW: Compact radio sources and their nature

    Energy Technology Data Exchange (ETDEWEB)

    Rodríguez, Luis F.; Zapata, Luis A.; Palau, Aina, E-mail: l.rodriguez@crya.unam.mx, E-mail: l.zapata@crya.unam.mx, E-mail: a.palau@crya.unam.mx [Centro de Radioastronomía y Astrofísica, UNAM, Apdo. Postal 3-72 (Xangari), 58089 Morelia, Michoacán (Mexico)

    2014-07-20

    We present sensitive 2.1 and 3.3 cm Jansky Very Large Array radio continuum observations of the region IC 348 SW. We detect a total of 10 compact radio sources in the region, 7 of which are first reported here. One of the sources is associated with the remarkable periodic time-variable infrared source LRLL 54361, opening the possibility of monitoring this object at radio wavelengths. Four of the sources appear to be powering outflows in the region, including HH 211 and HH 797. In the case of the rotating outflow HH 797, we detect a double radio source at its center, separated by ∼3''. Two of the sources are associated with infrared stars that possibly have gyrosynchrotron emission produced in active magnetospheres. Finally, three of the sources are interpreted as background objects.

  20. Trace element mapping of two Pyrenean chert deposits (SW Europe) by PIXE

    Energy Technology Data Exchange (ETDEWEB)

    Sánchez de la Torre, Marta, E-mail: marta.sanchez-de-la-torre@u-bordeaux-montaigne.fr [IRAMAT-CRP2A (UMR 5060), CNRS/Université Bordeaux Montaigne, Maison de l’Archéologie, Esplanade des Antilles, 33607 Pessac Cedex (France); SERP-Universitat de Barcelona, Montalegre St 6-8, 08001 Barcelona (Spain); Angyal, Anikó; Kertész, Zsófia [MTA Atomki, Institute for Nuclear Research, Hungarian Academy of Sciences, H-4026 Debrecen (Hungary); Dubernet, Stéphan; Le Bourdonnec, François-Xavier [IRAMAT-CRP2A (UMR 5060), CNRS/Université Bordeaux Montaigne, Maison de l’Archéologie, Esplanade des Antilles, 33607 Pessac Cedex (France); Csedreki, László; Furu, Enikő; Papp, Enikő; Szoboszlai, Zoltán; Szikszai, Zita [MTA Atomki, Institute for Nuclear Research, Hungarian Academy of Sciences, H-4026 Debrecen (Hungary)

    2017-06-01

    The geochemical character of two chert formations from the Pyrenean mountain range (SW Europe) was established by PIXE analyses. While it was not possible to distinguish the formations through reference to major and minor elements, some variations were revealed at the trace elemental level. In order to determine if these elements are associated with the Si matrix or to the contents of a specific inclusion, elemental maps were acquired and the elemental composition of the identified inclusions were also determined. As a result, Sr, Ni and Zn are better represented in Montgaillard samples while Y, Hf, W and Zr are typical of Montsaunès cherts. Thanks to elemental maps it has been possible to determine that most of these characteristic elements are usually related to a specific inclusion content.

  1. Sedimentology models from activity concentration measurements: application to the 'Bay of Cadiz' Natural Park (SW Spain)

    International Nuclear Information System (INIS)

    Ligero, R.A.; Vidal, J.; Melendez, M.J.; Hamani, M.; Casas-Ruiz, M.

    2009-01-01

    A previous study on seabed sediments of the Bay of Cadiz (SW of Spain) enabled us to identify several relations between sedimentological variables and activity concentrations of environmental radionuclides such as 137 Cs, 226 Ra, 232 Th and 40 K. In this paper the study has been extended to a large neighbouring inter-tidal area in order to establish if the above mentioned models can be generalized. As a result we have determined that the measured activity concentrations are closely to the values predicted by the theoretical models (correlation coefficient range = 0.85-0.93). Furthermore, the proposal model for granulometric facies as a function of activity concentrations of the abovementioned radionuclides provides for the sediments distribution a representation which agrees with the values of the tidal energy distribution obtained using numeric models calibrated with experimental data from current meters and water level recorders

  2. Physiological responses of coastal phytoplankton (Visakhapatnam, SW Bay of Bengal, India) to experimental copper addition.

    Science.gov (United States)

    Biswas, Haimanti; Bandyopadhyay, Debasmita

    2017-10-01

    Trace amount of copper (Cu) is essential for many physiological processes; however, it can be potentially toxic at elevated levels. The impact of variable Cu concentrations on a coastal phytoplankton community was investigated along a coastal transect in SW Bay of Bengal. A small increase in Cu supply enhanced the concentrations of particulate organic carbon, particulate organic nitrogen, biogenic silica, total pigment, phytoplankton cell and total bacterial count. At elevated Cu levels all these parameters were adversely affected. δ 13 C POM and δ 15 N POC reflected a visible signature of both beneficial and toxic impacts of Cu supply. Skeletonema costatum, the dominant diatom species, showed higher tolerance to increasing Cu levels relative to Chaetoceros sp. Cyanobacteria showed greater sensitivity to copper than diatoms. The magnitude of Cu toxicity on the phytoplankton communities was inversely related to the distance from the coast. Co-enrichment of iron alleviated Cu toxicity to phytoplankton. Copyright © 2017 Elsevier Ltd. All rights reserved.

  3. Saddle-shaped reticulate Nummulites from Early Oligocene rocks of Khari area, SW Kutch, India

    Science.gov (United States)

    Sengupta, S.; Sarkar, Sampa; Mukhopadhyay, S.

    2011-04-01

    Saddle-shaped reticulate Nummulites from the Early Oligocene rocks of Khari area, SW Kutch, India is reported here for the first time. Unusual shape of this Nummulites is due to the curved nature of the coiling plane, indicating space constrained postembryonic test growth. With regular development of chambers, septa and septal filaments, the saddle-shaped Nummulites constitutes the third morphotype of N. cf. fichteli Michelotti form A. Other morphotypes of the species reported earlier include inflated lenticular and conical tests. Multiple morphotypes of N. cf. fichteli form A indicates varied test growth in response to substrate conditions. Morphological variability exhibited by N. cf. fichteli form A from Kutch and some Early Oligocene reticulate Nummulites from the Far East are comparable. This faunal suite is morphologically distinct from the contemporary reticulate Nummulites of the European localities.

  4. Comparative study of uranium concentration in water samples of SW and NE Punjab, India

    International Nuclear Information System (INIS)

    Saini, Komal; Bajwa, B.S.

    2014-01-01

    Since the commencement of the earth, radiations and natural radioactivity has always been a part of environment. Uranium is heaviest naturally occurring element which is widespread in nature, mainly occurs in granites mineral deposits. The natural weathering of rocks such as granite dissolves the natural uranium, which goes into groundwater by leaching and precipitation called illumination process. People are always exposed to certain amount of uranium from air, water, soil and food as it is usually present in these components. About 85% of ingested uranium enter into human body through drinking water which makes it very important to estimate uranium concentration in potable water. Uranium and some other heavy metals may increase the risk of kidney damage, cancer diseases where experimental evidence suggests that respiratory and reproductive system are also affected by uranium exposure. In the present study comparative study of uranium concentration in potable water samples of SW and NE Punjab has been analysed

  5. Nuclear DNA content of the pigeon orchid (Dendrobium crumenatum Sw. with the analysis of flow cytometry

    Directory of Open Access Journals (Sweden)

    Upatham Meesawat

    2008-05-01

    Full Text Available Nuclear DNA content for the adult plants grown in a greenhouse and in vitro young plantlets of the pigeon orchid (Dendrobium crumenatum Sw. was analyzed using flow cytometry. The resulting 2C DNA values ranged from 2.30±0.14 pgto 2.43±0.06 pg. However, nuclear DNA ploidy levels of long-term in vitro plantlets were found to be triploid and tetraploid.These ploidy levels were confirmed by chromosome counting. Tetraploid individuals (2n = 4x = 76 had approximately two times DNA content than diploid (2n = 2x = 38 individuals. This variation may be due to prolonged cultivation and thepresence of exogenous plant growth regulators.

  6. Late Pleistocene Climate Events and The Origin of Agriculture In SW Asia

    Science.gov (United States)

    Rossignol-Strick, M.

    In the Eastern Mediterranean sea, the climate succession of the last deglaciation is documented and dated in marine cores by the d18-O variation of foraminiferal cal- cite and pollen records. The Last Glacial Maximum is identified by a large abundance of grass pollen from a prairie-type vegetal cover with low annual precipitation in the mountainous north and east borderlands of the sea, where the pollen mainly origi- nates. During the first phase of the last deglaciation, the Bolling/Allerod chronozone, the moisture availability increases and makes possible the spread of a deciduous for- est, as shown by the increasing pollen abundance of the deciduous oak. The cold and arid Younger Dryas is identified by a reversal to semi-desert conditions, with the in- crease of sage-brush (Artemisia) and the saline-tolerant Chenopodiaceae. The climate of the earliest Holocene is Optimum for at least 3000 years (9000-6000yr BP), with the largest spread of the deciduous forest at low-middle elevations signalling wet sum- mers and of the Pistacia woodland at low elevations signalling mild, no-frost winters. This is the time when the most recent sapropel deposited in the eastern Mediterranean under anoxic bottom conditions generated by a surface lid of lower salinity due to the concomitant largest floods of the Nile River fed by the strongest African monsoon rains in the Ethiopian Highlands. In SW Asia, the pollen records of lakes and marshes have been correlated with those of the marine cores, thereby obtaining a robust time-frame. In that area, the archaeo- logical data of human settlements are independently dated by 14C. Thus the archaeo- logical succession can be securely set against the well-dated climatic succession. The Late Palaeolithic populations of SW Asia were wandering hunter-gatherers in the prairies of the Last Glacial Maximum, where they already collected wild wheat, barley and fruit. With the Bolling/Allerod wetter and warmer climate, they began to settle in

  7. Effector-driven marker development and cloning of resistance genes against Phytophthora infestans in potato breeding clone SW93-1015

    DEFF Research Database (Denmark)

    Lenman, Marit; Ali, Ashfaq; Mühlenbock, Per

    2016-01-01

    different P. infestans effectors, containing the conserved motif RXLR (for Arg, any amino acid, Leu, Arg), revealed a specific response to Avr2, which suggests that SW93-1015 might contain a functional homolog of the R2 resistance gene. We cloned eight R2 gene homologs from SW93-1015, whereof seven have...

  8. Back analysis of an earthquake-triggered submarine landslide near the SW of Xiaoliuqiu

    Directory of Open Access Journals (Sweden)

    Huai-Houh Hsu

    2018-01-01

    Full Text Available Occurred in the offshore of SW Taiwan on 26 December 2006 with a magnitude of 7, the Pingtung earthquake had triggered numbers of submarine landslides. This event provides an excellent opportunity to incorporate the back analysis approach to evaluate the in situ shear strength parameters. According to the chirp sonar images of the seabed near the SW Xiaoliuqiu obtained before and after the earthquake were adopted to establish the slope profile and identified the location of a circular sliding surface. Consequently, the in situ, effective strength parameters under the critical condition can be calculated by back slope stability analysis. Submarine sediment sampler was obtained via gravity sampling method and the laboratory tests were performed to determine the index properties and strength parameters. Test results indicate the cored sediment has the characteristics of normally consolidated (NC clay. The effective friction angle (φ’ is 15.3° with cohesion (c’ of 19.4 kPa. The effective and total stress methods were used to perform the back analysis. The strength parameters derived from back analysis of effective and total stress methods all indicate values approach the CIU triaxial tests results. Consequently, the representativeness of the marine sediment characteristics obtained from laboratory tests is identified. The total stress approach yields an undrained strength ratio cu/σ'vo of 0.26 which well fit the ratio used in geotechnical practice for estimating NC clay. According to the analytical approach, the landslide was applied seismic forces (seismic coefficient kh = 0.14 and generated excess pore pressure of 31 kPa at the sliding surface.

  9. Evaluation of thermal performance in fields subjected to steam injection (SW-SAGD mode), Orinoco oil belt, Venezuela

    Energy Technology Data Exchange (ETDEWEB)

    Armas, F.; Mago, R.; Franco, L.; Rodriguez, J.; Gil, E. [PDVSA EandP (Venezuela)

    2011-07-01

    The first well to operate the SW-SAGD process in the Orinoco oil belt in Venezuela was built in 2006 by Petroleos de Venezuela S.A (PDVSA). SW-SAGD is a thermal recovery process consisting in the injection of steam through a horizontal well pipe insulation. In order to follow the behavior of steam and the movement of heated fluids in such a process better, PDVSA installed a monitoring system composed of high temperature fiber optic and thermocouple type sensors. The aim of this paper is to assess the thermal behavior of reservoirs in wells under the SW-SAGD process. A pilot test has been conducted over the last 3 years. Results show an increase in production and estimations show a recovery factor twice as high as in other wells. This study demonstrated that SW-SAGD is an excellent alternative solution to stimulate reservoirs in the Orinoco oil belt and valuable information on the reservoir's thermal behavior was established.

  10. Ams Fabric and Deformation of The Jawornik Granitoids In The Zloty Stok - Skrzynka Deformation Zone (sudetes, SW Poland)- Preliminary Interpretations.

    Science.gov (United States)

    Werner, T.; Bialek, D.

    Jawornik granitoids comprise the NE-SW trending sequences of the 1cm up to 1 km thick granitoid veins surrounded by schists and gneisses of the Zloty Stok - Skrzynka deformation zone in Eastern Sudetes (SW Poland). According to conflicting theories granitoids are of magmatic origin or were formed from blastomylonitic rocks that underwent multiphase deformation. AMS studies were performed for the 53 sites lo- calized within granitoid veins and within the surrounding gneisses. AMS foliations for granitoid veins of various thickness as well as for gneisses dip at moderate to steep an- gles to N-NW. AMS lineations in the surrounding gneisses plunge subhorizontally to NE-SW that reflects the regional NE-SW shearing components. Magnetic lineations for sites within wider veins of granitoids plunge at low angles (mostly from S to W) but with more varying trends between sites. Mezoscopic tectonic foliations are record- able only in 50% of sites. They show good correlation with AMS planar fabric on the site scale. The uniformity of AMS fabric on the site scale and high AMS anisotropy within all sites (P of 1.05-1.30, T of 0.3-0.6 on average) suggest syntectonic gener- ation of granitoids. Further interpretations of the AMS and tectonic fabrics will be performed when microtectonic studies and chemical analyses results are available.

  11. Late-Quaternary variations in clay minerals along the SW continental margin of India: Evidence of climatic variations

    Digital Repository Service at National Institute of Oceanography (India)

    Chauhan, O.S.; Sukhija, B.S.; Gujar, A.R.; Nagabhushanam, P.; Paropkari, A.L.

    Down-core variations in illite, chlorite, smectite and kaolinite (the major clays) in two sup(14)C-dated cores collected along the SW continental margin of India show that illite and chlorite have enhanced abundance during 20-17, 12.5, 11-9.5, and 5...

  12. Multi-temporal InSAR evidence of ground subsidence induced by groundwater withdrawal: the Montellano aquifer (SW Spain)

    NARCIS (Netherlands)

    Ruiz-Constán, A.; Ruiz-Armenteros, A.M.; Lamas-Fernández, F.; Martos-Rosillo, S.; Delgado, J.M.; Bekaert, D.P.S.; Sousa, J.J.; Gil, A.J.; Caro Cuenca, M.; Hanssen, R.F.; Galindo-Zaldívar, J.; Sanz de Galdeano, C.

    2016-01-01

    This study uses the InSAR technique to analyse ground subsidence due to intensive exploitation of an aquifer for agricultural and urban purposes in the Montellano town (SW Spain). The detailed deformation maps clearly show that the spatial and temporal extent of subsidence is controlled by

  13. Human induced soil erosion and the implications on crop yield in a small mountainous Mediterranean catchment (SW-Turkey)

    NARCIS (Netherlands)

    Van Loo, Maarten; Dusar, Bert; Verstraeten, Gert; Renssen, Hans; Notebaert, Bastiaan; D'Haen, Koen; Bakker, Johan

    2017-01-01

    Many hillslopes in the limestone dominated Taurus Mountain Range (SW Turkey) are characterized by severely depleted soils, while a significant amount of sediment is being stored in the valley bottoms. The same holds true for the 11.4 km2 endorheic Gravgaz basin in the vicinity of the

  14. Control del avance del frente de llama en el lecho de sinterización de minerales de hierro

    Directory of Open Access Journals (Sweden)

    Cores, A.

    2010-06-01

    Full Text Available A sintering pan of 40 cm cubed is loaded with a mixture of iron ores, limestone and coke weighing 110 kg in a sintering pilot plant. In this sintering pan, a series of thermocouples have been introduced at different depths. Tests have been carried out to study the width of the combustion zone and the maximum temperature of the flame front across the sintering bed. For the analysis of the results, a data acquisition system was used. This consisted of two modules connected in serie, for performing the analogue-digital conversion. The analogue entry point is the exit point of the thermocouples and the digital exit point was the temperature average. A computer was used for conserving and storing the data and for carrying out interpolations, simulating the state and evolution of the flame front across the bed.

    En una planta piloto de sinterización se cargan, en la paila cúbica de 40 cm de lado, 110 kg de una mezcla de minerales de hierro, caliza y coque, donde se han introducido una serie de termopares a diferentes profundidades. Se realizan ensayos para estudiar la evolución del ancho de la zona de combustión y de la temperatura máxima del frente de llama a través del lecho de sinterización. Para el análisis de los resultados se utiliza un sistema de adquisición de datos formado por dos módulos conectados en serie, encargados de realizar la conversión analógico-digital. La entrada analógica es la salida de los termopares y la salida digital es la medida de la temperatura. Se dispone de un ordenador para la conservación y almacenamiento de los datos y para realizar interpolaciones que simulan el estado y evolución del frente de llama a través del lecho.

  15. Frentes de ondas (wavefronts e limites da visão humana Parte 2: aplicações

    Directory of Open Access Journals (Sweden)

    Jankov Mirko

    2002-01-01

    Full Text Available Os valores médios de todos os coeficientes de Zernike são de aproximadamente zero, ao passo que a variabilidade individual é muito grande, o que significa que os seres humanos, como espécie em geral, têm sistema óptico muito bom, mas individualmente imperfeito. Certa instabilidade temporal das aberrações de alta ordem foi descrita em função da acomodação. Este fato leva a uma nova pergunta: a correção de todas as aberrações para visão em estado não acomodado será benéfica para visão de perto também? É possível modificar e diminuir as aberrações ópticas por meio de foto-ablação por "scanning spot LASER" tendo os dados das frentes de ondas como a base para perfil de ablação individualizado. É fundamental a fixação perfeita do feixe de "LASER" em relação ao olho, obtida com os "eye-trackers" de alta freqüência. O benefício visual teórico da correção das aberrações de alta ordem seria de até 12 vezes. A meta principal dos tratamentos guiados pelas frentes de onda é de não permitir a piora da visão depois do tratamento cirúrgico refrativo, como pode ocorrer hoje em dia com os tratamentos tradicionais a "LASER"; em seguida, a meta se es-tenderia aos melhoramentos visuais, bem como ao tratamento dos casos de córneas extremamente irregulares (ablações primárias irregulares, pequenas ou descentradas, a presença das ilhas centrais ou irregularidades após transplante de córnea. O entendimento da terminologia e das bases da nova evolução tecnológica, bem como o constante acompanhamento crítico dos resultados publicados é fundamental para a abordagem moderna dos problemas relativos à refração e à cirurgia refrativa.

  16. Evidencia internacional del comportamiento de compra del consumidor frente a iniciativas de RSE y competencias corporativas de la empresa

    Directory of Open Access Journals (Sweden)

    Percy Samoel Marquina Feldman

    2013-04-01

    Full Text Available El estadio de la investigación sobre Responsabilidad Social Empresarial (RSE puede encontrarse en una etapa de madurez pero no necesariamente es así con las respuestas de los consumidores frente a sus iniciativas. Los resultados de los estudios que prueban la relación entre ambas son controversiales. Por un lado, algunos indican que existe una relación positiva entre las acciones de RSE y la reacción de los consumidores para con dicha empresa y sus productos (Ellen, Webb, & Mohr, 2006; Carvalho, Sen, Mota, & Carneiro, 2010; por el otro, algunas investigaciones afirman que esta relación no siempre es directa y evidente, dejando a numerosos factores  la tarea de explicar los efectos de las actividades de RSE de la empresa en las intenciones de compra de los consumidores (Carrigan & Attalla, 2001; Maignan & Ferrell, 2004. Parece existir entonces una controversia entre qué es lo relevante y qué no lo es, a la hora de explicar por qué los consumidores compran productos con atributos de RSE (Devinney, Auger, Eckhardt, & Birtchnell, 2006; Arredondo, Maldonado, & De la Garza, 2010. Auger, Burke, Devinney, y Louviere (2003 tratan de aclarar la polémica al señalar las deficiencias de algunos estudios que si bien ordenan y priorizan la importancia de tópicos de RSE, evitan incluir medidas de trade-off entre atributos tradicionales y atributos de RSE; de este modo, los resultados no pueden mostrar por qué los consumidores prefieren productos con atributos de RSE en comparación a otros (Fan, 2005. Las consecuencias prácticas de establecer un vínculo claro entre las acciones de RSE y las respuestas de los consumidores frente a estas son muchas. Un vínculo positivo entre RSE y las elecciones del consumidor estimula a las empresas a hacer grandes inversiones en RSE (Mittal, 2008, desplazando el debate de la RSE de "si" al "cómo" (Bhattacharya & Sen, 2004. Además, el apoyo a la RSE no sólo afecta a los motivos de compra y lealtad, sino

  17. Reactividad inmunoquímica de sueros anti- Caiman yacare y Caiman latirostris frente a sueros de diferentes especies

    Directory of Open Access Journals (Sweden)

    de Roodt, Adolfo Rafael

    2010-06-01

    Full Text Available Se estudió la reactividad inmunoquímica entre los sueros de distintas especies de reptiles frente a sueros hiperinmunes experimentales anti-suero de Caiman yacare y anti-suero de Caiman latirostris. Los sueros que se probaron fueron los homólogos de Caiman yacare, Caiman latirostris y los heterólogos de Alligator missisipiensis, Tupinambis merinae, Tupinambis rufescens, Chelonoidis chilensis, Clelia rustica, Waglerophis merremii, Lystrophys dorbignyi, Phyton molurus, Boa constrictor occidentalis, Eunectes notaeus, Crotalus durissus terrificus, Bothrops alternatus, Bothrops diporus, Bothrops jararaca, Bothrops jararacussu, Bothrops moojeni, Pitangus sulphuratus y Gallus gallus. La reactividad inmunoquímica se determinó mediante las técnicas de doble inmunodifusión y ELISA, mostrándose importante entre los sueros de los crocodrílidos y baja entre estos y los de las otras especies de reptiles estudiadas. Se observó mayor reactividad entre los antisueros anti-Caiman respecto a los sueros de Caiman latirostris y Caiman yacare que frente al suero de Alligator missisipiensis. Además, se encontró una fuerte reactividad entre ambos sueros anti-Caiman y el de Gallus gallus poniendo en evidencia la fuerte reactividad entre los sueros de arcosaurios. In order to study the immunochemical reactivity among sera from different species of reptiles regarding sera from Caiman, the immunoreactivity of sera from reptiles against antisera to Caiman yacare or anti-Caiman latirostris sera was studied. These hiperimmune sera were tested against sera from Alligator missisipiensis, Tupinambis merinae, Tupinambis rufescens, Chelonoidis chilensis, Clelia rustica, Waglerophis merremii, Lystrophys dorbignyi, Phyton molurus, Boa constrictor occidentalis, Eunectes notaeus, Crotalus durissus terrificus, Bothrops alternatus, Bothrops neuwiedii, Bothrops jararaca, Bothrops jararacussu, Bothrops moojeni, Pitangus sulphuratus and Gallus gallus. The immunochemical

  18. La Violencia en Colombia de M. Guzmán, O. Fals y E. Umaña y las trasgresiones al Frente Nacional

    Directory of Open Access Journals (Sweden)

    Alberto Valencia Gutiérrez

    2012-07-01

    Full Text Available El artículo lleva a cabo una presentación del libro La Violencia en Colombia. Estudio de un proceso social en el marco de lo que representa su publicación en un momento en que el Frente Nacional, pacto bipartidista de alternación y de reparto del poder entre los partidos liberal y conservador, pretende hacer “borrón y cuenta nueva” de lo sucedido durante la llamada Violencia de los años 1950. El objetivo del artículo es dar cuenta de cómo la aparición de este libro, lo mismo que el juicio político que se llevó a cabo en el Senado en contra del general Rojas Pinilla, constituye una verdadera transgresión de los presupuestos en los que se basaba el Frente Nacional.

  19. Linking Tengchong Terrane in SW Yunnan with Lhasa Terrane in southern Tibet through magmatic correlation

    Science.gov (United States)

    Xie, Jincheng; Zhu, Dicheng; Dong, Guochen; Zhao, Zhidan; Wang, Qing

    2016-04-01

    New zircon U-Pb data, along with the data reported in the literature, reveal five phases of magmatic activity in the Tengchong Terrane since the Early Paleozoic with spatial and temporal variations summarized as: Cambrian-Ordovician (500-460 Ma) to the eastern, minor Triassic (245-206 Ma) in the eastern and western, abundant Early Cretaceous (131-114 Ma) in the eastern, extensive Late Cretaceous (77-65 Ma) in the central, and Paleocene-Eocene (65-49 Ma) in the central and western Tengchong Terrane, in which the Cretaceous-Eocene magmatism was migrated from east to west (Xu et al., 2012). The increased zircon eHf(t) of the Early Cretaceous granitoids from -12.3 to -1.4 at ca. 131-122 Ma to -4.6 to +7.1 at ca. 122-114 Ma identified for the first time in this study and the magmatic flare-up at ca. 53 Ma in the central and western Tengchong Terrane (Wang et al., 2014, Ma et al., 2015) indicate the increased contributions from mantle- or juvenile crust-derived components. The spatial and temporal variations and changing magmatic compositions with time in the Tengchong Terrane closely resemble the Lhasa Terrane in southern Tibet. Such similarities, together with the data of stratigraphy and paleobiogeography (Zhang et al., 2013), enable us to propose that the Tengchong Terrane in SW Yunnan is most likely linked with the Lhasa Terrane in southern Tibet, both of which experience similar tectonomagmatic histories since the Early Paleozoic. References Ma, L.Y., Wang, Y.J., Fan, W.M., Geng, H.Y., Cai, Y.F., Zhong, H., Liu, H.C., Xing, X.W., 2014. Petrogenesis of the early Eocene I-type granites in west Yingjiang (SW Yunnan) and its implication for the eastern extension of the Gangdese batholiths. Gondwana Research 25, 401-419. Wang, Y.J., Zhang, L.M., Cawood, P.A., Ma, L.Y., Fan, W.M., Zhang, A.M., Zhang, Y.Z., Bi, X.W., 2014. Eocene supra-subduction zone mafic magmatism in the Sibumasu Block of SW Yunnan: Implications for Neotethyan subduction and India-Asia collision

  20. Capacidad bactericida de Bifidobacterium sp. aislada de leche materna y de heces de neonatos, frente a los principales causantes de enfermedades transmitidas por alimentos

    OpenAIRE

    Vanegas, María Consuelo; González, Lina María; Arévalo, Stefany Alejandra

    2010-01-01

    Introducción. La microbiota del tubo digestivo humano contiene bacterias benéficas para la salud que regulan el funcionamiento del colon e inhiben algunos microorganismos patógenos intestinales. Las bifidobacterias aisladas de neonatos y de leche materna se usan como microorganismos probióticos para prevenir enfermedades infecciosas, incluidas las transmitidas por alimentos. Objetivo. Aislar e identificar Bifidobacterium sp. en humanos y determinar su capacidad bactericida frente a patógenos ...

  1. Políticas anticlericales y sistemas de representación en el Frente Popular, 1936. El caso de la comarca andaluza de Antequera

    Directory of Open Access Journals (Sweden)

    Miguel Ángel Melero Vargas

    2015-03-01

    Full Text Available El presente artículo aborda uno de los aspectos más interesantes y tratados, aun-que nunca para el caso de Antequera, a la hora del estudio de uno de los aspectos más señeros desarrollados en la II República, así como fundamentalmente, y recrudecido, a partir de la victoria del Frente Popular en febrero de 1936, como sobre todo, y con una impregnación de violencia inusitada, tras el estallido de la sublevación militar de julio de 1936. Fundamental-mente la sustitución de la enseñanza religiosa, pero también otros aspectos como la secularización y uso social de los edificios de la Iglesia, serán líneas sobre las que discurra este trabajo.      Palabras clave: Anticlericalismo, Antequera, Frente Popular, enseñanza religiosa, religiosidad.  ___________________ Abstract: The present article approaches one of the most interesting and treated aspects, though never for the case of Antequera, at the moment of the study of one of the most solitary aspects developed in the Second Republic, as well as fundamentally, and worsened, from the victory of the "Frente Popular” in February, 1936, since especially, and with an impregnation of unusual violence, after the snap of the military revolt of July, 1936. Fundamentally the substitution of the religious education, but also other aspects like the secularization and social use of the buildings of the Church, will be lines on which it thinks up this work.      Keywords: Anticlericalism, Antequera, “Frente Popular”, religious education, religiousness. 

  2. ENSAYO PRELIMINAR DE LA ACTIVIDAD ANTIBACTERIANA DE EXTRACTOS DE ALLIUM SATIVUM, CORIANDRUM SATIVUM, EUGENIA CARYOPHYLLATA, ORIGANUM VULGARE, ROSMARINUS OFFICINALIS Y THYMUS VULGARIS FRENTE A CLOSTRIDIUM PERFRINGENS

    OpenAIRE

    Ardila Q., Martha I; Vargas A., Andrés F; Pérez C., Jorge E; Mejía G., Luis F

    2009-01-01

    Se evaluó la actividad antibacteriana frente a Clostridium perfringens (cepa ATCC: 13124) por el método de Kirby Bauer en agar SPS de los aceites esenciales o extractos vegetales obtenidos con solventes orgánicos de diferente polaridad a partir de Allium sativum (ajo), Coriandrum sativum (cilantro), Eugenia Caryophyllata (clavo de olor), Origanum vulgare (orégano), Rosmarinus officinalis (romero) y Thymus vulgaris (tomillo), utilizando la vancomicina como control. Los extractos obtenidos por ...

  3. Atuação do psicólogo frente aos transtornos globais do desenvolvimento infantil

    Directory of Open Access Journals (Sweden)

    José Carlos Souza

    Full Text Available Os autores fazem uma revisão bibliográfica sobre a atuação do psicólogo frente aos transtornos globais do desenvolvimento infantil, especificamente sobre: autismo infantil, síndrome de Asperger e síndrome de Rett. Inicialmente, apresenta-se uma noção do desenvolvimento infantil, e, então, abordam-se os possíveis transtornos, com suas respectivas definições, etiologias, critérios diagnósticos, diagnóstico diferencial e tratamento. Durante o processo de intervenção e prevenção junto à criança, destacam-se a importância do psicólogo no tratamento e a eficácia dos recursos psicoterápicos para a melhora de qualidade de vida da criança com a síndrome.

  4. Crecimiento y desarrollo del sector asegurador; frente a la evolución cultural de las empresas de familia

    Directory of Open Access Journals (Sweden)

    Juan Hernando Bravo Reyes

    2016-04-01

    Full Text Available El tema de los seguros se convirtió en una necesidad, al igual que el conocimiento de una segunda lengua. El mundo de los negocios exige que el conocimiento en seguros sea indispensable es por esta razón que en es te documento se analiza el crecimiento y desarrollo del sector asegurador frente a las necedades de las empresas de familia pequeñas y medianas, lomando como punto de partida la historia y perspectivas futuras ele más de 125 años, que en su momento, forjaron las primeras compañías colombianas ele seg uros. Se es tudian las implicaciones del sector asegurador en la evolución cultural ele es te tipo ele empresas, determinando algunas de las razones que han generado des confianza entre aseguradoras y asegurados, se evalúan las exigencias y garantías al momento de contratar una póliza ele seguro, así como los documentos y requisitos para reclamar en caso de un siniestro para concluir que en materia de seguros el modelo cultural de los colombianos se mantiene estancado, la desconfianza y mal entendimiento entre los contratantes es el común denominador de un negocio que tiene como principio fundamental la buena fe; entonces ¿cuál será el futuro del sector bajo este panorama?

  5. LA VERSATILIDAD DEL PRONOMBRE UNO PARA EXPRESAR POSICIONAMIENTO FRENTE A LO ENUNCIADO EN EL ESPAÑOL DE BARRANQUILLA, COLOMBIA

    Directory of Open Access Journals (Sweden)

    Luz Marcela Hurtado

    2016-01-01

    Full Text Available Los estudios comunicativo–funcionales han considerado los mecanismos de impersonalización como una brecha en la deixis, o como desfocalizadores del centro deíctico. Sin embargo, este trabajo se inspira en planteamientos previos sobre la impersonalidad como extensión de la deixis. Consiste en un estudio variacionista de los diferentes grados de generalidad expresados mediante uno en la variedad caribeña de Barranquilla, Colombia. Con base en los conceptos de deíxis textual, discursiva y social, incorpora factores lingüísticos asociados con los grados de impersonalización (interpretación referencial, tipo de discurso y clase semántica del verbo, y factores pragmáticos afines con las relaciones de poder y solidaridad (polaridad, tipo de interacción, formas de tratamiento y relaciones entre los interactuantes. Los resultados proporcionan evidencia estadística acerca de un uso personal de uno con las funciones deícticas de yo : predomina cuando el hablante expresa su posicionamiento frente a lo enunciado, es decir, su centro deíctico, sus experiencias personales, conocimientos, evaluaciones y sentimientos.

  6. Entre guerra y paz. América Latina frente a la tragedia del primer conflicto mundial

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    Graziano Palamara

    2015-07-01

    Full Text Available El trabajo propone un análisis sobre las posturas latinoamericanas frente a la Primera Guerra Mundial —PGM—. La reflexión se fundamenta en un modelo interpretativo que considera las guerras de alcance mundial no solo como el punto de disgregación de un sistema internacional, sino más bien como el momento fundante de un nuevo orden. Este modelo permite reflexionar sobre la manera en que Latinoamérica se acercó al declive del orden posnapoleónico y la conducta que ella tuvo cuando, en 1917, con el ingreso en el conflicto de los estados Unidos y la Revolución de Octubre en Rusia, se abrió en el contexto de las relaciones internacionales una nueva época que habría mantenido intactas alguna s de sus características, por lo menos hasta la caída del muro de Berlín.

  7. Sentimentos de adolescentes com Diabetes Mellitus frente ao processo de viver com a doença

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    Delmo de Carvalho Alencar

    2013-08-01

    Full Text Available Pesquisa de natureza qualitativa, realizada em um serviço de diabetes do interior do Ceará com 11 adolescentes portadores de diabetes mellitus. O estudo objetivou compreender a experiência do adolescente frente ao processo de viver com o diabetes. Os dados foram coletados nos meses de maio e junho de 2007 por meio de entrevista semiestruturada. Constatou-se que o adolescente enfrenta dificuldades desde o momento do diagnóstico, principalmente no plano alimentar e nas mudanças no estilo de vida, desencadeando sentimentos como medo, insegurança e revolta. Com o passar do tempo, incorporam as mudanças necessárias ao tratamento e cuidados; e passam a ver a doença de forma normal. Conclui-se que é necessário compreender os adolescentes, seus comportamentos, medos e anseios e apoiá-los nos diversos âmbitos dessa experiência.

  8. Atuação do psicólogo frente aos transtornos globais do desenvolvimento infantil

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    José Carlos Souza

    Full Text Available O artigo apresenta revisão bibliográfica sobre a atuação do psicólogo frente aos transtornos globais do desenvolvimento infantil, especificamente sobre autismo infantil, síndrome de Asperger e síndrome de Rett. Inicialmente, apresenta-se uma noção do desenvolvimento infantil, e, então, abordam-se possíveis transtornos, com suas respectivas definições, etiologias, critérios diagnósticos, diagnóstico diferencial e tratamento. Durante o processo de intervenção e prevenção junto à criança, destacam-se a importância do psicólogo no tratamento e a eficácia dos recursos psicoterápicos para a melhora de qualidade de vida da criança com a síndrome.

  9. VIVÊNCIAS MATERNAS FRENTE ÀS PECULIARIDADES DA PREMATURIDADE QUE DIFICULTAM A AMAMENTAÇÃO

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    Luciana Barbosa Pereira

    2015-01-01

    Full Text Available Estudio cualitativo, que utilizó como referencial teórico el Interaccionismo Simbológico y como metodológico el Interaccionismo Interpretativo con el objetivo de revelar las vivencias maternas frente a las peculiaridades de la prematuridad que dificultan el acto de amamantar durante la internación del bebé en Unidad de Terapia Intensiva Neonatal. Fueran entrevistadas 13 madres de recién nacidos prematuros, atendidas en Ambulatorio de Follow-up, municipio de Montes Claros - MG, Brasil. Los resultados revelaron que al intentar amamantar al hijo prematuro, la madre interacciona con situaciones significadas por ella como obstáculos al amamantamiento: el “tormento” de la hospitalización del hijo, su inestabilidad clínica, miedo de muerte del bebé, su dificultad en succionar el pecho, el inicio tardío del amamantamiento interpretado como algo difícil y riesgoso al gaño de peso. Consideramos que, aunque el proceso de amamantamiento del recién nacido prematuro sea un verdadero desafío, conductas profesionales y rutinas hospitalarias adecuadas facilitan la práctica y deben ser incentivadas.

  10. LA PARTICIPACIÓN A DEBATE: UNA EVALUACIÓN CUALITATIVA DEL PLAN ANDALUZ FRENTE AL VIH/SIDA

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    Eugenia Gil García

    2014-01-01

    Full Text Available Este trabajo tiene como objetivo analizar las perspectivas y significados que tienen de la participación social los principales actores involucrados en un programa de salud. Se realizó una evaluación cualitativa del Programa Andaluz frente al VIH/Sida y otras infecciones de trasmisión sexual. Mediante muestreo teórico se seleccionaron los participantes: 20 portadores de VIH, 19 representantes y voluntarios de asociaciones antisida y seis representantes de la administración. La información se obtuvo mediante entrevistas semi-estructuradas y grupos triangulares; haciéndose análisis de contenido. La participación tiene significados diferentes para los grupos participantes. Los portadores de VIH consideran que debe concretarse en mecanismos de comunicación, ayuda y prevención; los integrantes de asociaciones la entienden como un derecho y una herramienta para cambiar las políticas sanitarias, mientras que en los representantes de la administración coexisten dos concepciones. Se propone impulsar diseños participativos que respeten la diversidad teórica y favorezcan la interacción desde distintas posturas.

  11. Colombia frente a la economía de conocimiento, ¿un callejón sin salida?

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    Leonardo Pineda

    2013-07-01

    Full Text Available Se está ad portas de la llamada sociedad del conocimiento, donde hay una estrecha relación con el desarro- llo científico-tecnológico y de innovación de los países. Este artículo trata de establecer si Colombia está preparada para ingresar en esta nueva sociedad. Tras la comparación de varias metodologías de evaluación del conocimiento y la innovación del Banco Mundial y del INSEAD, todo parece indicar que Colombia toda- vía está lejos de alcanzar niveles por encima de la media mundial en desarrollo científico-tecnológico y la innovación estratégica. Esta situación espera revertirse frente a las políticas y estrategias adoptadas por el Gobierno Colombiano, al incluir la ciencia, la tecnología y la innovación como una de las locomotoras del Plan Nacional de Desarrollo 2010-2014.

  12. Metasomatic processes in the orthogneiss-hosted Archaean peridotites of the Fiskefjord region, SW Greenland

    Science.gov (United States)

    Szilas, K.; Cruz, M. F.; Grove, M.; Morishita, T.; Pearson, D. G.

    2016-12-01

    Field observations and preliminary geochemical data are presented for large (>500x1000m) peridotite enclaves from the Fiskefjord region of SW Greenland. These ultramafic complexes are dominated by dunite, amphibole-harzburgite, lesser amounts of norite and horizons of stratiform chromitite and are therefore interpreted as cumulate rocks[1]. The ultramafic enclaves are hosted by intrusive tonalitic orthogneiss, which provide U-Pb zircon minimum age constraints of ca. 2980 Ma, whereas preliminary Re-Os isotope data on the dunite and chromitite yield TRD ages of ca. 3300 Ma[2]. Dunite has highly forsteritic olivine compositions with Mg# mostly around 92 to 93, which is uncorrelated with the bulk-rock mg# or modal chromite contents. This indicates that the primary olivine records equilibration with a highly magnesian parental magma, which may have been responsible for the strong depletion of the SCLM in this region. Amphibole and phlogopite is mostly associated with granitoid sheets or infiltrating veins in the dunite and appear to replace chromite. Argon dating (40Ar/39Ar) of the phlogopite yields ages ranging from ca. 3400 Ma to ca. 1750 Ma, with most ages clustering around 3000 Ma. This is consistent with formation of the phlogopite and amphibole by metasomatic processes involving reaction between granitoid-derived siliceous fluids and the ultramafic rocks. The older 40Ar/39Ar age plateaus most plausibly represent excess Ar, potentially inherited from the nearby Itsaq Gneiss Complex (3900 to 3600 Ga) based on its proximity. The youngest 40Ar/39Ar age plateaus on the other hand may potentially signify the closure-age for this system, which could have important implications for determining the exhumation history of the North Atlantic craton. References [1] Szilas, K., Kelemen, P. B., & Bernstein, S. (2015). Peridotite enclaves hosted by Mesoarchaean TTG-suite orthogneisses in the Fiskefjord region of southern West Greenland. GeoResJ, 7, 22-34. [2] Szilas, K., van

  13. The predicted CLARREO sampling error of the inter-annual SW variability

    Science.gov (United States)

    Doelling, D. R.; Keyes, D. F.; Nguyen, C.; Macdonnell, D.; Young, D. F.

    2009-12-01

    The NRC Decadal Survey has called for SI traceability of long-term hyper-spectral flux measurements in order to monitor climate variability. This mission is called the Climate Absolute Radiance and Refractivity Observatory (CLARREO) and is currently defining its mission requirements. The requirements are focused on the ability to measure decadal change of key climate variables at very high accuracy. The accuracy goals are set using anticipated climate change magnitudes, but the accuracy achieved for any given climate variable must take into account the temporal and spatial sampling errors based on satellite orbits and calibration accuracy. The time period to detect a significant trend in the CLARREO record depends on the magnitude of the sampling calibration errors relative to the current inter-annual variability. The largest uncertainty in climate feedbacks remains the effect of changing clouds on planetary energy balance. Some regions on earth have strong diurnal cycles, such as maritime stratus and afternoon land convection; other regions have strong seasonal cycles, such as the monsoon. However, when monitoring inter-annual variability these cycles are only important if the strength of these cycles vary on decadal time scales. This study will attempt to determine the best satellite constellations to reduce sampling error and to compare the error with the current inter-annual variability signal to ensure the viability of the mission. The study will incorporate Clouds and the Earth's Radiant Energy System (CERES) (Monthly TOA/Surface Averages) SRBAVG product TOA LW and SW climate quality fluxes. The fluxes are derived by combining Terra (10:30 local equator crossing time) CERES fluxes with 3-hourly 5-geostationary satellite estimated broadband fluxes, which are normalized using the CERES fluxes, to complete the diurnal cycle. These fluxes were saved hourly during processing and considered the truth dataset. 90°, 83° and 74° inclination precessionary orbits as

  14. Retrieving SW fluxes from geostationary narrowband radiances for the NASA-CERES SYN1deg product

    Science.gov (United States)

    Wrenn, F. J., IV; Doelling, D. R.; Liang, L.

    2017-12-01

    The CERES mission was designed to measure the natural variability of the net TOA flux over long time scales relevant to climate monitoring. To achieve this goal, CERES provides the level-3 SSF1deg, SYN1deg, and EBAF monthly 1° by 1° regional TOA flux. The single satellite (Terra or Aqua) SSF1deg 24-hour shortwave flux is based on one daytime measurements and assumes constant meteorology to model the diurnal change in albedo. To accurately describe regions with a prominent diurnal signal, the SYN1deg Edition4 dataset employs hourly geostationary (GEO) measurements. This improves upon Edition3, which used 3-hourly GEO measurements and with temporal interpolation. The EBAF product combines the temporal stability of the SSF1deg product with the diurnal information from SYN1deg and removes the CERES instrument calibration bias by constraining the net flux balance to the ocean heat storage term. The SYN-1deg product retrieves hourly SW fluxes from GEO measurements. Over regions with large diurnal cycles, such as maritime stratus and land afternoon convective locations, the GEO derived SW fluxes will capture the diurnal flux not observed with Terra or Aqua sun-synchronous satellites. Obtaining fluxes from geostationary satellite radiance is a multistep process. First, most GEO visible imagers lack calibration and must be calibrated to MODIS and VIIRS. Second, the GEO imager visible channel radiances are converted to broadband radiances using empirical and theoretical models. The lack of coincident, collocated, and co-angled GEO and CERES measurements makes building an empirical model difficult. The narrowband to broadband models are a function of surface and cloud conditions, which are difficult to identify due to the inconsistent cloud retrievals between the 16 GEO imagers used in the CERES record. Third, the GEO derived broadband radiances are passed through the CERES angular distribution model (ADM) to convert the radiances to fluxes. Lastly, the GEO derived

  15. PROGRAMA Y COBERTURAS DE VACUNACIÓN FRENTE A SARAMPIÓN Y RUBEOLA EN ESPAÑA. RETOS PARA ALCANZAR SU ELIMINACIÓN

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    Aurora Limia Sánchez

    2015-01-01

    Full Text Available Una de las estrategias fundamentales establecidas por la Organización Mundial de la Salud para conseguir la eliminación del sarampión y la rubeo-la es alcanzar y mantener coberturas de vacunación muy elevadas con dos dosis frente a sarampión y al menos una dosis frente a rubeola en el progra-ma de vacunación rutinario. El programa actual de vacunación en España contempla la administración de dos dosis de vacuna combinada frente a sa-rampión, rubeola y parotiditis a los 12 meses y los 3-4 años de edad. Desde el año 2000 se mantienen las coberturas iguales o superiores al 95% con la primera dosis, pero con la segunda dosis las coberturas son menores, entre el 90-95%. En el año 2014 no se ha alcanzado el objetivo para la primera dosis en tres comunidades autónomas y para la segunda dosis solamente ocho comunidades autónomas han alcanzado el objetivo. Se discuten los retos y aspectos a mejorar para fortalecer el programa de vacunación con la finalidad de conseguir la eliminación de estas enfermedades en España.

  16. Differential RNA-seq analysis comparing APC-defective and APC-restored SW480 colorectal cancer cells.

    Science.gov (United States)

    King, Lauren E; Love, Christopher G; Sieber, Oliver M; Faux, Maree C; Burgess, Antony W

    2016-03-01

    The adenomatous polyposis coli (APC) tumour suppressor gene is mutated in about 80% of colorectal cancers (CRC) Brannon et al. (2014) [1]. APC is a large multifunctional protein that regulates many biological functions including Wnt signalling (through the regulation of beta-catenin stability) Reya and Clevers (2005) [2], cell migration Kroboth et al. (2007), Sansom et al. (2004) [3], [4], mitosis Kaplan et al. (2001) [5], cell adhesion Faux et al. (2004), Carothers et al. (2001) [6], [7] and differentiation Sansom et al. (2004) [4]. Although the role of APC in CRC is often described as the deregulation of Wnt signalling, its other biological functions suggest that there are other factors at play that contribute to the onset of adenomas and the progression of CRC upon the truncation of APC. To identify genes and pathways that are dysregulated as a consequence of loss of function of APC, we compared the gene expression profiles of the APC mutated human CRC cell line SW480 following reintroduction of wild-type APC (SW480 + APC) or empty control vector (SW480 + vector control) Faux et al. (2004) . Here we describe the RNA-seq data derived for three biological replicates of parental SW480, SW480 + vector control and SW480 + APC cells, and present the bioinformatics pipeline used to test for differential gene expression and pathway enrichment analysis. A total of 1735 genes showed significant differential expression when APC was restored and were enriched for genes associated with cell polarity, Wnt signalling and the epithelial to mesenchymal transition. There was additional enrichment for genes involved in cell-cell adhesion, cell-matrix junctions, angiogenesis, axon morphogenesis and cell movement. The raw and analysed RNA-seq data have been deposited in the Gene Expression Omnibus (GEO) database under accession number GSE76307. This dataset is useful for further investigations of the impact of APC mutation on the properties of colorectal cancer cells.

  17. Geoquímica e Geocronologia do Plutonismo Granítico Mesoproterozóico do SW do Estado de Mato Grosso (SW do Cráton Amazônico)

    OpenAIRE

    Mauro Cesar Geraldes

    2000-01-01

    O objetivo deste trabalho é o estudo geocronológico e da composição química dos granitóides da porção SW do estado do Mato Grosso. A abordagem deste projeto tem relevância para o entendimento da evolução geológica através da identificação, na área de estudo, de eventos de acresção crustal durante o Paleo e Mesoproterozóico que vieram a compor significativa fração do SW Cráton Amazônico. Na região do Terreno Jauru, tonalitos, vulcânicas ácidas e gnaisses analisados pelo método U/Pb em zircões ...

  18. Effects of Krill Oil on serum lipids of hyperlipidemic rats and human SW480 cells

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    Qian Wen-Bin

    2008-08-01

    Full Text Available Abstract Background Cardiovascular disease (CVD and colon cancer incidence are known to be closely related to dietary factors. This article evaluated effects of krill oil (KO on serum lipids of hyperlipidemia rats and human colon cancer cells (SW480. Serum lipids of rats fed with high fat diet (HFD and different doses of KO were measured by automatic analyzer. Effect of KO on viability of cells was determined by methyl thiazolyl tetrazolium (MTT assay. Results Except for higher dose group, body weights decreased significantly. Total cholesterol (TC, LDL-cholesterol (LDL-C of all dose groups, Triglycerides (TG of low and mid dose groups descended significantly, while there were no significant differences of HDL-cholesterol (HDL-C, compared with control group. Treatment of colon cancer cells with KO also resulted in time-dependent inhibition of cell growth. Conclusion Our findings indicated that the consumption of KO may provide benefits to control serum lipid levels in certain diseases and inhibit growth of colon cancer cells. Therefore, KO may be a good candidate for development as a functional food and nutraceutical.

  19. Structure of the epiphyte community in a tropical montane forest in SW China.

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    Mingxu Zhao

    Full Text Available Vascular epiphytes are an understudied and particularly important component of tropical forest ecosystems. However, owing to the difficulties of access, little is known about the properties of epiphyte-host tree communities and the factors structuring them, especially in Asia. We investigated factors structuring the vascular epiphyte-host community and its network properties in a tropical montane forest in Xishuangbanna, SW China. Vascular epiphytes were surveyed in six plots located in mature forests. Six host and four micro-site environmental factors were investigated. Epiphyte diversity was strongly correlated with host size (DBH, diameter at breast height, while within hosts the highest epiphyte diversity was in the middle canopy and epiphyte diversity was significantly higher in sites with canopy soil or a moss mat than on bare bark. DBH, elevation and stem height explained 22% of the total variation in the epiphyte species assemblage among hosts, and DBH was the most important factor which alone explained 6% of the variation. Within hosts, 51% of the variation in epiphyte assemblage composition was explained by canopy position and substrate, and the most important single factor was substrate which accounted for 16% of the variation. Analysis of network properties indicated that the epiphyte host community was highly nested, with a low level of epiphyte specialization, and an almost even interaction strength between epiphytes and host trees. Together, these results indicate that large trees harbor a substantial proportion of the epiphyte community in this forest.

  20. Mineralogy and origin of atmospheric particles in the industrial area of Huelva (SW Spain)

    Science.gov (United States)

    Bernabé, J. M.; Carretero, M. I.; Galán, E.

    The mineralogy of atmospheric particles at the confluence of the Tinto and Odiel rivers, south of Huelva (a highly industrialized city in the SW Spain), was characterized in view to identify source origins. In spite of the small amount of sample collected, mineralogical characterization was performed by X-ray diffraction, polarized light microscopy and scanning electron microscopy with EDS analysis system, using an adequate sample preparation methodology. Sedimentable (SP) and aerosols particles were sampled an one-week basis every two months for one year. Quartz, calcite and feldspars were found to be the major minerals in both fractions, and phyllosilicates, dolomite and gypsum were also identified in lower content. Minor mineral particles included barite, apatite, sphalerite and pyrite. SEM studies revealed the additional presence of chalcopyrite in both SP and aerosols, and of chalcocite-covellite, halite and sylvite in the latter. Siderite, hematite and ankerite were only detected in the SP fraction. The concentrations of the previous minerals increased in summer by effect of the limited rain and the resulting scarcity of atmosphere washing. Non-mineral particles detected by SEM in SP and aerosol fractions included spherical, biological and compositionally complex particles. The main source of mineral particles was found to be the soil suspension in addition to the metallurgical and fertilizer production industries in the area.

  1. Structure of the epiphyte community in a tropical montane forest in SW China.

    Science.gov (United States)

    Zhao, Mingxu; Geekiyanage, Nalaka; Xu, Jianchu; Khin, Myo Myo; Nurdiana, Dian Ridwan; Paudel, Ekananda; Harrison, Rhett Daniel

    2015-01-01

    Vascular epiphytes are an understudied and particularly important component of tropical forest ecosystems. However, owing to the difficulties of access, little is known about the properties of epiphyte-host tree communities and the factors structuring them, especially in Asia. We investigated factors structuring the vascular epiphyte-host community and its network properties in a tropical montane forest in Xishuangbanna, SW China. Vascular epiphytes were surveyed in six plots located in mature forests. Six host and four micro-site environmental factors were investigated. Epiphyte diversity was strongly correlated with host size (DBH, diameter at breast height), while within hosts the highest epiphyte diversity was in the middle canopy and epiphyte diversity was significantly higher in sites with canopy soil or a moss mat than on bare bark. DBH, elevation and stem height explained 22% of the total variation in the epiphyte species assemblage among hosts, and DBH was the most important factor which alone explained 6% of the variation. Within hosts, 51% of the variation in epiphyte assemblage composition was explained by canopy position and substrate, and the most important single factor was substrate which accounted for 16% of the variation. Analysis of network properties indicated that the epiphyte host community was highly nested, with a low level of epiphyte specialization, and an almost even interaction strength between epiphytes and host trees. Together, these results indicate that large trees harbor a substantial proportion of the epiphyte community in this forest.

  2. Neogene magmatism and its possible causal relationship with hydrocarbon generation in SW Colombia

    Science.gov (United States)

    Vásquez, Mónica; Altenberger, Uwe; Romer, Rolf L.

    2009-07-01

    The Cretaceous oil-bearing source and reservoir sedimentary succession in the Putumayo Basin, SW Colombia, was intruded by gabbroic dykes and sills. The petrological and geochemical character of the magmatic rocks shows calc-alkaline tendency, pointing to a subduction-related magmatic event. K/Ar dating of amphibole indicates a Late Miocene to Pliocene age (6.1 ± 0.7 Ma) for the igneous episode in the basin. Therefore, we assume the intrusions to be part of the Andean magmatism of the Northern Volcanic Zone (NVZ). The age of the intrusions has significant tectonic and economic implications because it coincides with two regional events: (1) the late Miocene/Pliocene Andean orogenic uplift of most of the sub-Andean regions in Peru, Ecuador and Colombia and (2) a pulse of hydrocarbon generation and expulsion that has reached the gas window. High La/Yb, K/Nb and La/Nb ratios, and the obtained Sr-Nd-Pb isotopic compositions suggest the involvement of subducted sediments and/or the assimilation of oceanic crust of the subducting slab. We discuss the possibility that magma chamber(s) west of the basin, below the Cordillera, did increase the heat flow in the basin causing generation and expulsion of hydrocarbons and CO2.

  3. Subaqueous rhyolite block lavas in the Miocene Ushikiri Formation, Shimane Peninsula, SW Japan

    Science.gov (United States)

    Kano, Kazuhiko; Takeuchi, Keiji; Yamamoto, Takahiro; Hoshizumi, Hideo

    1991-06-01

    A rhyolite mass of the Miocene Ushikiri Formation in the western part of the Shimane Peninsula, SW Japan, is a small subaqueous edifice about 600 m high and 4 km wide, formed at water depths between 200 and 1000 m. It consists mainly of three relatively flat, lava-flow units 50-300 m in maximum thickness, each of which includes lobes and their polyhedral fragments. The lava lobes are poorly to well vesiculated, glassy to microcrystalline and flow-banded and -folded. Compared with mafic pillows, they are large, having thick, quenched and brecciated, glassy crusts because of their high viscosity, surface tension and thermal conductivity. Their surfaces disintegrate into polyhedral fragments and grade into massive volcanic breccia. The massive volcanic breccia composed of the lobe fragments is poorly sorted and covered with stratified volcanic breccia of the same rock type. The rhyolite lavas commonly bifurcate in a manner similar to mafic pillow lavas. However, they are highly silicic with 1-5 vol.% phenocrysts and have elongated vesicles and flow-folds, implying that they were visco-plastic during flowage. Their surface features are similar to those of subaerial block lava. With respect to rheological and morphological features, they are subaqueous equivalents of block lava.

  4. ECOLOGIC FEATURES OF WOOD ANATOMY OF Casearia sylvestris SW (SALICACEAE IN THREE BRAZILIAN ECOSYSTEMS

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    Graciene da Silva Mota

    2017-12-01

    Full Text Available Casearia sylvestris SW (Salicaceae is a highly adaptive perennial species that is found throughout Latin America and widely spread in Brazil. This work analyzed the ecological features of wood anatomy of C. sylvestris occurring in three ecosystem types: Cerrado, Gallery Forest (Northern of Minas Gerais and Mata Atlântica (Southern of Minas Gerais. Qualitative features were similar among plants in the three ecosystems, differing only in the distribution of pith flecks and neighboring tyloses that were more frequent in Cerrado and Gallery Forest. The quantitative results showed significant differences for several parameters, as well as variation between individuals of vegetation types of Northern and Southern of Minas Gerais. The correlation matrix of variables including quantitative anatomical characteristics, soil characteristics, height and diameter of the plants showed that plants were grouped by ecosystem type. Casearia sylvestris might adopt different survival strategies regarding safety and efficiency of water transport by wood anatomy ecological adaptation. The adaptive anatomical features to drought were mostly an decrease of vessel frequency and an increase of ray width and frequency.

  5. Probabilistic seismic hazard assessment for the two layer fault system of Antalya (SW Turkey) area

    Science.gov (United States)

    Dipova, Nihat; Cangir, Bülent

    2017-09-01

    Southwest Turkey, along Mediterranean coast, is prone to large earthquakes resulting from subduction of the African plate under the Eurasian plate and shallow crustal faults. Maximum observed magnitude of subduction earthquakes is Mw = 6.5 whereas that of crustal earthquakes is Mw = 6.6. Crustal earthquakes are sourced from faults which are related with Isparta Angle and Cyprus Arc tectonic structures. The primary goal of this study is to assess seismic hazard for Antalya area (SW Turkey) using a probabilistic approach. A new earthquake catalog for Antalya area, with unified moment magnitude scale, was prepared in the scope of the study. Seismicity of the area has been evaluated by the Gutenberg-Richter recurrence relationship. For hazard computation, CRISIS2007 software was used following the standard Cornell-McGuire methodology. Attenuation model developed by Youngs et al. Seismol Res Lett 68(1):58-73, (1997) was used for deep subduction earthquakes and Chiou and Youngs Earthq Spectra 24(1):173-215, (2008) model was used for shallow crustal earthquakes. A seismic hazard map was developed for peak ground acceleration and for rock ground with a hazard level of a 10% probability of exceedance in 50 years. Results of the study show that peak ground acceleration values on bedrock change between 0.215 and 0.23 g in the center of Antalya.

  6. Landsat TM data processing for lithological discrimination in the Caraculo area (Namibe Province, SW Angola)

    Science.gov (United States)

    Alberti, A.; Alessandro, V.; Pieruccini, U.; Pranzini, E.

    1993-10-01

    Landsat TM data were used for lithological discrimination and mapping in the little-known, semiarid 900 km 2 area around Caraculo station and the middle course of the Rio Giraul (Namibe Province, SW Angola) following two main procedures. The first of these was based on visual evaluation of three-band composites, band-ratio composites and Principal Component Analysis. The second method relied on the extraction of spectral signatures, and their use to obtain automatic classifications. Satisfactory results were reached with the first procedure, thus allowing - with limited support of ground information — the draft of a lithological map, while the second method was not systematically efficient, even for confirmation of data acquired with the first procedure. Image interpretation suggests that an extensive but hithertoun differentiated metasedimentary complex consisting of a heterogeneous supracrustal sequence should be subdivided into at least two units. Field observations proved that one of these is marked by a notable frequency of marbles and the other is characterized by a widespread occurrence of amphibolitic bodies. Moreover, a belt of undetermined (thermally metamorphosed ?) metamorphic rocks is interposed between them. The distinction of so far unidentified units, though restricted to interpretation of processed Landsat TM data, has significant geological implications also in the regional context and will be helpful in guiding future work with conventional geological methods.

  7. Soft-Sediment Deformation Structures Interpreted as Seismites in the Kolankaya Formation, Denizli Basin (SW Turkey)

    Science.gov (United States)

    Topal, Savaş; Özkul, Mehmet

    2014-01-01

    The NW-trending Denizli basin of the SW Turkey is one of the neotectonic grabens in the Aegean extensional province. It is bounded by normal faults on both southern and northern margins. The basin is filled by Neogene and Quaternary terrestrial deposits. Late Miocene- Late Pliocene aged Kolankaya formation crops out along the NW trending Karakova uplift in the Denizli basin. It is a typical fluviolacustrine succession that thickens and coarsens upward, comprising poorly consolidated sand, gravelly sand, siltstone and marl. Various soft-sediment deformation structures occur in the formation, especially in fine- to medium grained sands, silts and marls: load structures, flame structures, clastic dikes (sand and gravely-sand dike), disturbed layers, laminated convolute beds, slumps and synsedimentary faulting. The deformation mechanism and driving force for the soft-sediment deformation are related essentially to gravitational instability, dewatering, liquefaction-liquidization, and brittle deformation. Field data and the wide lateral extent of the structures as well as regional geological data show that most of the deformation is related to seismicity and the structures are interpreted as seismites. The existence of seismites in the Kolankaya Formation is evidence for continuing tectonic activity in the study area during the Neogene and is consistent with the occurrence of the paleoearthquakes of magnitude >5. PMID:25152909

  8. Phototrophic microbes form endolithic biofilms in ikaite tufa columns (SW Greenland).

    Science.gov (United States)

    Trampe, Erik; Castenholz, Richard W; Larsen, Jens E N; Kühl, Michael

    2017-11-01

    Marine tufa-columns, formed by the hydrated carbonate mineral ikaite, present a unique alkaline microbial habitat only found in Ikka Fjord (SW-Greenland). The outermost parts of the ikaite columns exhibit a multitude of physico-chemical gradients, and the porous ikaite is colonized by endolithic phototrophic biofilms serving as a substrate for grazing epifauna, where scraping by sea urchins affects overall column-topography. We present a detailed study of the optical microenvironment, spatial organization, and photosynthetic activity of endolithic phototrophs within the porous ikaite crystal matrix. Cyanobacteria and diatoms formed distinctly coloured zones and were closely associated with ikaite-crystals via excretion of exopolymers. Scalar-irradiance measurements showed strong attenuation of visible light (400-700 nm), where only ∼1% of incident irradiance remained at 20 mm depth. Transmission spectra showed in vivo absorption signatures of diatom and cyanobacterial photopigments, which were confirmed by HPLC-analysis. Variable-chlorophyll-fluorescence-imaging showed active photosynthesis with high-light acclimation in the outer diatom layer, and low-light acclimation in the underlying cyanobacterial part. Phototrophs in ikaite thus thrive in polymer-bound endolithic biofilms in a complex gradient microhabitat experiencing constant slow percolation of highly alkaline phosphate-enriched spring water mixing with cold seawater at the tufa-column-apex. We discuss the potential role of these biofilms in ikaite column formation. © 2017 Society for Applied Microbiology and John Wiley & Sons Ltd.

  9. A cultura permeando os sentimentos e as reações frente à dor La cultura permeando los sentimentos y las reacciones frente al dolor Culture permeating the feelings and the reactions in the face of pain

    Directory of Open Access Journals (Sweden)

    Maria de Lourdes Denardin Budó

    2007-03-01

    Full Text Available Este estudo descreve a percepção e os significados da dor em adultos usuários do SUS. A popu-lação compreendeu 60 pacientes que buscaram o serviço no período. A pesquisa foi do tipo exploratório-descritiva, cujos dados foram coletados com entrevista semi-estruturada e analisados qualitativamente, constituindo temas que emergiram, sendo agrupados por categorias. Evidenciou-se que "o significado da dor" revelou o predomínio do entendimento da dor como uma questão física; apontou a dor relacionada também a questões emocionais e sentimentais, religiosas e humanas. "A reação de homens e mulheres frente à dor" é percebida diferentemente conforme o sexo feminino e masculino. Em "como você se sente nas situações em que tem dor?", as respostas variaram entre afetivas, cognitivas e comportamentais.Em este estudio se describe la percepción y los significados del dolor en adultos usuarios del Sistema Único de Salud (SUS. La población comprendió 60 pacientes que buscaron el servicio en el período. La investigación fue de tipo descriptivo exploratorio, cuyos datos fueron recolectados con una entrevista semi-estructurada y analizados cualitativamente, constituyendo temas que emergieron siendo agrupados por categorías. Se evidenció que "el significado del dolor" reveló el predominio del entendimiento del dolor como una cuestión física; apuntó el dolor relacionado también a cuestiones emocionales y sentimentales, religiosas y humanas. "La reacción de hombres y mujeres frente al dolor" es percibida de manera diferente conforme el sexo femenino y masculino. En "cómo se siente en situaciones en que tiene dolor?", las respuestas variaron entre afectivas, cognitivas y de comportamiento.This study describes the perception of pain and the meanings it has for adults who use the Brazilian public health system, the Sistema Único de Saúde (SUS. The sample was comprised of 60 patients who sought the service in the period. This is a

  10. Geological Study of Active Cold Seeps in the Syn-collision Accretionary Prism Kaoping Slope off SW Taiwan

    Directory of Open Access Journals (Sweden)

    Chi-Yue Huang

    2006-01-01

    Full Text Available Pogonophoran tube worms, elongated pyrite tubes and authigenic carbonate nodules are used to evaluate the occurrence of potential cold seeps in the syn-collision accretionary prism Kaoping Slope off SW Taiwan. At least two species of pogonophoran tubeworms were found in surface and core sediments. Pyrites occur in three different forms: fillings inside foraminiferal chambers, cements between calcareous microfossils, and elongated tubes. The bottom water off SW Taiwan is aerobic, but authigenic pyrites are found in the surface sediments at several sites, suggesting the existence of local reducing environments enabling the formation of pyrites. These environments are most likely caused by the occurrence of active cold seeps where methane expulses. Authigenic carbonates with highly depleted carbon isotope values (-54 to -43‰ were found at more than 5 locations, in agreement with a methane-derived source for the carbon.

  11. Interaction of fructose with other medium components to affect bioproduction of docosahexaenoic acid (DHA) by Aurantiochytrium sp. SW1

    Science.gov (United States)

    Manikan, Vidyah; Kalil, Mohd. Sahaid; Shuib, Shuwahida; Hamid, Aidil Abdul

    2018-04-01

    Thraustochytrids are a group of marine fungus-like microheterotrophs of which some can accumulate considerable amounts of the high valued omega-3 oil, docosahexaenoic acid (DHA). In this study, a local thraustochytrid isolate, Aurantiochytrium sp. SW1, was cultivated in a medium containing fructose as the major carbon source. The effects of this carbon source in interaction with yeast extract, monosodium glutamate (MSG) and sea salt were studied using a software-based two level full factorial design. Results showed that fructose as a single factor, has significant positive effect on the volumetric DHA content of SW1. Similarly, its interaction with yeast extract has profound positive effect. However, interactions of fructose with MSG and sea salt were significant negative effects. These results indicate that manipulation of the concentration of fructose in the culture medium may serve as a simple and useful strategy to help achieve preferred amount of DHA.

  12. Correlation between catch data from bottom longlines and fish censures in the SW lagoon of New Caledonia

    OpenAIRE

    Kulbicki, Michel

    1988-01-01

    On a total of 363 bottoms longline sets in the SW lagoon of New Caledonia, 45 were surveyed using visual census. Abundance and biomass estimates were derived from these censuses. These estimates were highly correlated to catch per unit effort in numbers and weight. From these relationships were established contour maps of soft bottom fish abundance and biomass. The total biomass of longline catchable fish was estimated between 11800 and 25500 tons with an average of 17700 tons which represent...

  13. Cryopreservation of chayote (Sechium edule JACQ.SW.) zygotic embryos and shoot-tips from in vitroplantlets

    OpenAIRE

    Abdelnour-Esquivel, Ana; Engelmann, Florent

    2002-01-01

    This paper presents the development of cryopreservation protocols for zygotic embryos and apices of chayote (Sechium edule Jacq. Sw.), a tropical plant species with recalcitrant seeds. Zygotic embryos of two cultivars, Ccocro negro (CN) and Claudio (Cl) could withstand cryopreservation, with survival percentages of 10 and 30 %, after desiccation to 23 and 19 % moisture content (fresh weight basis), respectively. Apices sampled on in vitro plantlets of cultivars Cl, 13 and JM we...

  14. ECONOMICAL VIABILITY OF PRESERVATIVE TREATMENT OF Prosopis juliflora (SW) D.C. WOOD SUBMITTED TO SAP DISPLACEMENT METHOD

    OpenAIRE

    Desmoulis Wanderley de Farias Sobrinho; Juarez Benigno Paes; Judernor Fernandes Filgueiras

    2008-01-01

    This work aimed to evaluate the economical viability of preservative treatment of Prosopis juliflora (Sw) D.C. roundpieces treated with Osmose CCB commercial preservative applied by sap displacement method in rural property and to comparetheir costs with Mimosa caesalpiniifolia, Mimosa tenuiflora and Prosopis juliflora non-treated pieces costs. The treatment of Prosopisjuliflora wood demonstrated to be economically viable when compared to alternatives using the Equivalent Annual Costs (EACs),...

  15. Mississippian lamprophyre dikes in western Sierras Pampeanas, Argentina: Evidence of transtensional tectonics along the SW margin of Gondwana

    Science.gov (United States)

    Martina, Federico; Canelo, Horacio N.; Dávila, Federico M.; de Hollanda, María Helena M.; Teixeira, Wilson

    2018-04-01

    In the Famatina range, Sierras Pampeanas of Argentina (SW Gondwana), subvertical calc-alkaline lamprophyric dike swarms crop out through >300 km. The dikes cut Ordovician units with a prominent NW-SE trending and are covered by continental sedimentary successions of Pennsylvanian to Permian age. The dikes show a strong structural control associated with Riedel fault systems. Detailed field analysis suggested a ∼N-S opening direction oblique to the attitude of dike walls and a left-lateral transtensional tectonics during the emplacement. 40Ar/39Ar geochronology of a lamprophyric sample defined a crystallization age (plateau; whole rock) of 357.1 ± 7.1 Ma (MSWD = 2.3). Coetaneous ductile zones with dominant strike-slip motion, documented along western Argentina for >600 km, suggest a regional event in SW Gondwana during the Mississippian. We propose that this deformation was the result of the counterclockwise fast rotation of Gondwana between 365 and 345 Ma, when the Famatina range and western Argentina occupied a sub-polar position. A transform margin along SW Gondwana better explains our (and others) data rather than a subduction margin. This scenario is also consistent with the occurrence of A-type granites and normal-fault basins within the foreland as well as bimodal volcanics.

  16. Rosiglitazone induces autophagy in H295R and cell cycle deregulation in SW13 adrenocortical cancer cells

    International Nuclear Information System (INIS)

    Cerquetti, Lidia; Sampaoli, Camilla; Amendola, Donatella; Bucci, Barbara; Masuelli, Laura; Marchese, Rodolfo; Misiti, Silvia; De Venanzi, Agostino; Poggi, Maurizio; Toscano, Vincenzo; Stigliano, Antonio

    2011-01-01

    Thiazolidinediones, specific peroxisome proliferator-activated receptor-γ (PPAR-γ) ligands, used in type-2 diabetes therapy, show favourable effects in several cancer cells. In this study we demonstrate that the growth of H295R and SW13 adrenocortical cancer cells is inhibited by rosiglitazone, a thiazolidinediones member, even though the mechanisms underlying this effect appeared to be cell-specific. Treatment with GW9662, a selective PPAR-γ-inhibitor, showed that rosiglitazone acts through both PPAR-γ-dependent and -independent mechanisms in H295R, while in SW13 cells the effect seems to be independent of PPAR-γ. H295R cells treated with rosiglitazone undergo an autophagic process, leading to morphological changes detectable by electron microscopy and an increased expression of specific proteins such as AMPKα and beclin-1. The autophagy seems to be independent of PPAR-γ activation and could be related to an increase in oxidative stress mediated by reactive oxygen species production with the disruption of the mitochondrial membrane potential, triggered by rosiglitazone. In SW13 cells, flow cytometry analysis showed an arrest in the G0/G1 phase of the cell cycle with a decrease of cyclin E and cdk2 activity, following the administration of rosiglitazone. Our data show the potential role of rosiglitazone in the therapeutic approach to adrenocortical carcinoma and indicate the molecular mechanisms at the base of its antiproliferative effects, which appear to be manifold and cell-specific in adrenocortical cancer lines.

  17. Comparison of SW and TW non-synchronous accelerating cavities as used in electron beam storage rings

    International Nuclear Information System (INIS)

    Zolfaghari, A.; Demos, P.T.; Flanz, J.B.; Jacobs, K.

    1991-01-01

    The authors relate the parameters of detuned standing wave (SW) and non-synchronous beam travelling wave (TW) accelerating cavities of equivalent equilibrium performance when used to compensate for radiation and parasitic energy losses by electrons circulating in a high energy electron storage ring. The relationship is expressed in terms of the coupling parameter β and cavity tuning angle ψ of the TW accelerator's equivalent SW system. A given TW cavity corresponds to a standing wave system possessing specific settings of β and ψ. This is shown for the constant impedance TW waveguide, for which β and ψ can be expressed as explicit functions of TW cavity length 1, attenuation factor I, RF electric field phase velocity V p , and shunt impedance r. Coupling parameter β depends additionally on SW cavity shunt impedance R. The basis they have used for formulating the equivalence of the two systems follows Travelling Wave Cavity Non-Synchronous Beam Loading theory developed by G.A. Loew and Standing Wave Circuit Analysis theory as described by P.B. Wilson

  18. Rosiglitazone induces autophagy in H295R and cell cycle deregulation in SW13 adrenocortical cancer cells

    Energy Technology Data Exchange (ETDEWEB)

    Cerquetti, Lidia; Sampaoli, Camilla [Endocrinology, Department of Clinical and Molecular Medicine, Sant' Andrea Hospital, Faculty of Medicine and Psychology ' Sapienza' University of Rome, Via di Grottarossa, 1035-00189 Rome (Italy); Research Center S. Pietro Hospital, Via Cassia, 600-00189 Rome (Italy); Amendola, Donatella; Bucci, Barbara [Research Center S. Pietro Hospital, Via Cassia, 600-00189 Rome (Italy); Masuelli, Laura [Department of Experimental Medicine, ' Sapienza' University of Rome, Rome (Italy); Marchese, Rodolfo [Research Center S. Pietro Hospital, Via Cassia, 600-00189 Rome (Italy); Misiti, Silvia [Endocrinology, Department of Clinical and Molecular Medicine, Sant' Andrea Hospital, Faculty of Medicine and Psychology ' Sapienza' University of Rome, Via di Grottarossa, 1035-00189 Rome (Italy); Research Center S. Pietro Hospital, Via Cassia, 600-00189 Rome (Italy); De Venanzi, Agostino; Poggi, Maurizio; Toscano, Vincenzo [Endocrinology, Department of Clinical and Molecular Medicine, Sant' Andrea Hospital, Faculty of Medicine and Psychology ' Sapienza' University of Rome, Via di Grottarossa, 1035-00189 Rome (Italy); Stigliano, Antonio, E-mail: antonio.stigliano@uniroma1.it [Endocrinology, Department of Clinical and Molecular Medicine, Sant' Andrea Hospital, Faculty of Medicine and Psychology ' Sapienza' University of Rome, Via di Grottarossa, 1035-00189 Rome (Italy); Research Center S. Pietro Hospital, Via Cassia, 600-00189 Rome (Italy)

    2011-06-10

    Thiazolidinediones, specific peroxisome proliferator-activated receptor-{gamma} (PPAR-{gamma}) ligands, used in type-2 diabetes therapy, show favourable effects in several cancer cells. In this study we demonstrate that the growth of H295R and SW13 adrenocortical cancer cells is inhibited by rosiglitazone, a thiazolidinediones member, even though the mechanisms underlying this effect appeared to be cell-specific. Treatment with GW9662, a selective PPAR-{gamma}-inhibitor, showed that rosiglitazone acts through both PPAR-{gamma}-dependent and -independent mechanisms in H295R, while in SW13 cells the effect seems to be independent of PPAR-{gamma}. H295R cells treated with rosiglitazone undergo an autophagic process, leading to morphological changes detectable by electron microscopy and an increased expression of specific proteins such as AMPK{alpha} and beclin-1. The autophagy seems to be independent of PPAR-{gamma} activation and could be related to an increase in oxidative stress mediated by reactive oxygen species production with the disruption of the mitochondrial membrane potential, triggered by rosiglitazone. In SW13 cells, flow cytometry analysis showed an arrest in the G0/G1 phase of the cell cycle with a decrease of cyclin E and cdk2 activity, following the administration of rosiglitazone. Our data show the potential role of rosiglitazone in the therapeutic approach to adrenocortical carcinoma and indicate the molecular mechanisms at the base of its antiproliferative effects, which appear to be manifold and cell-specific in adrenocortical cancer lines.

  19. Effect of LED irradiation on the expression of MMP-3 and MMP-13 in SW1353 cells in vitro

    Science.gov (United States)

    Zeng, Chang-chun; Guo, Zhou-yi; Zhang, Feng-xue; Deng, Wen-di; Liu, Song-hao

    2007-05-01

    Matrix Metalloproteinase (MMP) plays an active role in remodeling cartilage in osteoarthritic cartilage. To find an effective method of prevention of osteoclasia, this in vitro study focuses on the expression of MMP-3 and MMP-13 in the SW1353 cells by LED irradiation. The human chondrosarcoma cell line SW1353 were stimulated with the proinflammatory cytokine IL-1beta or tumor necrosis factor-alpha (TNF-alpha), and were received the irradiation of LED (632nm, 4mW/cm2). The cell count was assessed over a 96-hour period by using Trypan blue dye exclusion assay, and the cell activity was evaluated with a Cell Counting Kit-8 Assays. The subsequent expression of MMP-3 and MMP-13 was quantified. Results of this experiment showed that the cultural cell activity was decreased, and the expression of MMP-3 and MMP-13 was increased by being stimulated with IL-1beta or TNF-alpha. After received LED irradiation, the death rate of cultural cell was increased and the expression of MMP-3 and MMP-13 was decreased significantly. The present study concluded that particular LED irradiation stimulates SW1353 cell proliferation activity and inhibit the MMP-3 and MMP-13 enzymatic activity. These findings might be clinically relevant, indicating that the low power laser irradiation treatment is likely to achieve the repair of articular cartilage in clinic.

  20. Geometric-kinematic characteristics of the main faults in the W-SW of the Lut Block (SE Iran)

    Science.gov (United States)

    Rashidi Boshrabadi, Ahmad; Khatib, Mohamad Mahdi; Raeesi, Mohamad; Mousavi, Seyed Morteza; Djamour, Yahya

    2018-03-01

    The area to the W-SW of the Lut Block in Iran has experienced numerous historical and recent destructive earthquakes. We examined a number of faults in this area that have high potential for generating destructive earthquakes. In this study a number of faults are introduced and named for the first time. These new faults are Takdar, Dehno, Suru, Hojat Abad, North Faryab, North Kahnoj, Heydarabad, Khatun Abad and South Faryab. For a group of previously known faults, their mechanism and geological offsets are investigated for the first time. This group of faults include East Nayband, West Nayband, Sardueiyeh, Dalfard, Khordum, South Jabal-e-Barez, and North Jabal-e-Barez. The N-S fault systems of Sabzevaran, Gowk, and Nayband induce slip on the E-W, NE-SW and NW-SE fault systems. The faulting patterns appear to preserve different stages of fault development. We investigated the distribution of active faults and the role that they play in accommodating tectonic strain in the SW-Lut. In the study area, the fault systems with en-echelon arrangement create structures such as restraining and releasing stepover, fault bend and pullapart basin. The main mechanism for fault growth in the region seems to be 'segment linkage of preexisting weaknesses' and also for a limited area through 'process zone'. Estimations are made for the likely magnitudes of separate or combined failure of the fault segments. Such magnitudes are used in hazard analysis of the region.

  1. DETERMINISMOS CULTURAIS FRENTE À LUDICIDADE NA INFÂNCIA: CONCEITOS E CONCEPÇÕES PARADIGMÁTICAS

    Directory of Open Access Journals (Sweden)

    Jamily Charão Vargas

    2010-09-01

    Full Text Available Esta escrita contempla a temática da cultura instituída na sociedade e o espaço da infância ao longo dos tempos, discutindo a vivência das atividades lúdicas na primeira infância. Dessa forma, proporciona uma reflexão frente à percepção e à vivência da infância, estabelecida pela sociedade em cada tempo histórico. Utilizam-se autores como: Áries (1986 e Kramer; Leite (1998 para discutir a infância; Château (1987, Brougère (1995, Nogueira (1998, Santos (2000 e Negrini (2000 para a abordagem dos aspectos da ludicidade e sua importância ao desenvolvimento infantil; bem como Morin (1991, Pérez Gómez (2001, Neves (2002 e Santos (2002 a fim de entender os determinismos culturais na sociedade contemporânea, abordando aspectos da cultura escolar de hoje. Busca-se uma compreensão histórica de como a ludicidade está sendo vivenciada nos espaços-tempos infantis e, mais especificamente, na escola. Assim, acredita-se nas práticas lúdicas como atividades relevantes e, mesmo necessárias, para um bom desenvolvimento infantil, salientando que estas devem estar presentes nas práticas educativas em tempos de avanços econômicos, tecnológicos e industriais.

  2. WATER TEMPERATURE and Other Data from ALMIRANTE SALDANHA From SW Atlantic (limit-20 W) for 1967-01-01 (NODC Accession 9700076)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Phytoplankton, chlorophyll, and other data were collected from bottle casts in the SW Atlantic Ocean (lim-20 W) from the Almirante Saldanha from 16 March 1967 to 30...

  3. Benthic organisms collected using sediment sampler from the SW RESEARCHER in the Gulf of Mexico from 22 September 1977 to 16 December 1977 (NODC Accession 8100224)

    Data.gov (United States)

    National Oceanic and Atmospheric Administration, Department of Commerce — Benthic organisms were collected using sediment sampler casts from the SW RESEARCHER in the Gulf of Mexico from 22 September 1977 to 16 December 1977. Data were...

  4. Activation of AMP-Activated Protein Kinase α and Extracelluar Signal-Regulated Kinase Mediates CB-PIC-Induced Apoptosis in Hypoxic SW620 Colorectal Cancer Cells

    Directory of Open Access Journals (Sweden)

    Sung-Yun Cho

    2013-01-01

    Full Text Available Here, antitumor mechanism of cinnamaldehyde derivative CB-PIC was elucidated in human SW620 colon cancer cells. CB-PIC significantly exerted cytotoxicity, increased sub-G1 accumulation, and cleaved PARP with apoptotic features, while it enhanced the phosphorylation of AMPK alpha and ACC as well as activated the ERK in hypoxic SW620 cells. Furthermore, CB-PIC suppressed the expression of HIF1 alpha, Akt, and mTOR and activated the AMPK phosphorylation in hypoxic SW620 cells. Conversely, silencing of AMPKα blocked PARP cleavage and ERK activation induced by CB-PIC, while ERK inhibitor PD 98059 attenuated the phosphorylation of AMPKα in hypoxic SW620 cells, implying cross-talk between ERK and AMPKα. Furthermore, cotreatment of CB-PIC and metformin enhanced the inhibition of HIF1α and Akt/mTOR and the activation of AMPKα and pACC in hypoxic SW620 cells. In addition, CB-PIC suppressed the growth of SW620 cells inoculated in BALB/c athymic nude mice, and immunohistochemistry revealed that CB-PIC treatment attenuated the expression of Ki-67, CD34, and CAIX and increased the expression of pAMPKα in CB-PIC-treated group. Interestingly, CP-PIC showed better antitumor activity in SW620 colon cancer cells under hypoxia than under normoxia, since it may be applied to chemoresistance. Overall, our findings suggest that activation of AMPKα and ERK mediates CB-PIC-induced apoptosis in hypoxic SW620 colon cancer cells.

  5. Apatite intergrowths in clinopyroxene megacrysts from the Ostrzyca Proboszczowicka (SW Poland) basanite

    Science.gov (United States)

    Lipa, Danuta; Puziewicz, Jacek; Ntaflos, Theodoros; Matusiak-Małek, Magdalena

    2015-04-01

    The Cenozoic basanite from the Ostrzyca Proboszczowicka in Lower Silesia (SW Poland) belongs to numerous lavas occurring in the NE part of the Central European Volcanic Province. Basanite contains clinopyroxene megacrysts up to 3 cm in size. The clinopyroxene has the composition of aluminian-sodian diopside (mg# 0.61-0.70, 0.08-0.12 atoms Na pfu and 0.88-0.93 atoms Ca pfu). Cr is absent. The REE contents are above the primitive mantle reaching up to 18 x PM at Nd. Primitive-mantle normalized REE patterns show enrichment in LREE relative to HREE (LaN/LuN=3.81-5.01). The REE patterns of all the megacrysts show deflection in La-Nd. The trace element patterns are characterized by positive Zr, Hf and in some cases also Ta anomalies, and negative U, La, Sr, Ti and Pb ones. In some samples strong depletion (down to 0.01 x PM) in Rb and Ba is observed.The Ostrzyca megacrysts formed cumulate, which crystallized from magma similar to the host basanite, but more fractionated and enriched in REE, particularly in LREE (Lipa et al., 2014). This happened at mid-crustal depths (10-15 km) and the new pulse of basanitic magma entrained the crystals forming the non-solidified cumulate and brought them to the surface (Lipa et al., 2014). Clinopyroxene megacrysts contain large, transparent, euhedral apatite crystals up to 7 mm. The major element composition indicates the fluor-apatite with F content ranging from 0.87 to 1.93 wt.%. Chlorine content is strongly variable between grains (0.05-1.75 wt.%). Apatite is strongly enriched in LREE relative to HREE (LaN/LuN=60.39-62.23, about 1000 x PM for LREE and about 10 x PM for HREE). The REE patterns are nearly linear, with slight positive Nd and Gd anomalies. The trace element patterns are characterized by very strong negative anomalies of HFSE (Nb, Ta, Zr, Hf, Ti) and Pb, and weaker negative Sr anomaly. Concentration of Yb and Lu is on the level 10 x PM, whereas Rb, Hf and Ti are depleted relative to PM. Apatite preceded clinopyroxene

  6. Diversity and aboveground biomass of lianas in the tropical seasonal rain forests of Xishuangbanna, SW China

    Directory of Open Access Journals (Sweden)

    Xiao-Tao Lü

    2009-06-01

    Full Text Available Lianas are important components of tropical forests and have significant impacts on the diversity, structure and dynamics of tropical forests. The present study documented the liana flora in a Chinese tropical region. Species richness, abundance, size-class distribution and spatial patterns of lianas were investigated in three 1-ha plots in tropical seasonal rain forests in Xishuangbanna, SW China. All lianas with = 2 cm diameter at breast height (dbh were measured, tagged and identified. A total of 458 liana stems belonging to 95 species (ranging from 38 to 50 species/ha, 59 genera and 32 families were recorded in the three plots. The most well-represented families were Loganiaceae, Annonceae, Papilionaceae, Apocynaceae and Rhamnaceae. Papilionaceae (14 species recorded was the most important family in the study forests. The population density, basal area and importance value index (IVI varied greatly across the three plots. Strychnos cathayensis, Byttneria grandifolia and Bousigonia mekongensis were the dominant species in terms of IVI across the three plots. The mean aboveground biomass of lianas (3 396 kg/ha accounted for 1.4% of the total community aboveground biomass. The abundance, diversity and biomass of lianas in Xishuangbanna tropical seasonal rain forests are lower than those in tropical moist and wet forests, but higher than those in tropical dry forests. This study provides new data on lianas from a geographical region that has been little-studied. Our findings emphasize that other factors beyond the amount and seasonality of precipitation should be included when considering the liana abundance patterns across scales. Rev. Biol. Trop. 57 (1-2: 211-222. Epub 2009 June 30.Las lianas son componentes importantes de los bosques tropicales y tienen importantes impactos en la diversidad, la estructura y la dinámica de los bosques tropicales. El presente estudio documenta la flora de lianas en una región tropical estacional china. La

  7. Woody debris transport modelling by a coupled DE-SW approach

    Science.gov (United States)

    Persi, Elisabetta; Petaccia, Gabriella; Sibilla, Stefano

    2016-04-01

    The presence of wood in rivers is gaining more and more attention: on one side, the inclusion of woody debris in streams is emphasized for its ecological benefits; on the other hand, particular attention must be paid to its management, not to affect hydraulic safety. Recent events have shown that wood can be mobilized during floodings (Comiti et al. 2008, Lange and Bezzola 2006), aggravating inundations, in particular near urban areas. For this reason, the inclusion of woody debris influence on the prediction of flooded areas is an important step toward the reduction of hydraulic risk. Numerical modelling plays an important role to this purpose. Ruiz-Villanueva et al. (2014) use a two-dimensional numerical model to calculate the kinetics of cylindrical woody debris transport, taking into account also the hydrodynamic effects of wood. The model here presented couples a Discrete Element approach (DE) for the calculation of motion of a cylindrical log with the solution of the Shallow Water Equations (SW), in order to simulate woody debris transport in a two-dimensional stream. In a first step, drag force, added mass force and side force are calculated from flow and log velocities, assuming a reference area and hydrodynamic coefficients taken from literature. Then, the equations of dynamics are solved to model the planar roto-translation of the wooden cylinder. Model results and its physical reliability are clearly affected by the values of the drag and side coefficients, which in turn depend upon log submergence and angle towards the flow direction. Experimental studies to evaluate drag and side coefficients can be found for a submerged cylinder, with various orientations (Gippel et al. 1996; Hoang et al. 2015). To extend such results to the case of a floating (non-totally submerged) cylinder, the authors performed a series of laboratory tests whose outcomes are implemented in the proposed DE-SW model, to assess the effects of these values on the dynamic of woody

  8. Environmental drivers of phototrophic biofilms in an Alpine show cave (SW-Italian Alps)

    International Nuclear Information System (INIS)

    Piano, E.; Bona, F.; Falasco, E.; La Morgia, V.; Badino, G.; Isaia, M.

    2015-01-01

    The proliferation of lampenflora is a major threat for the conservation of show caves, since phototrophic organisms cause physical, chemical and aesthetic damage to speleothems. In this paper we examine the environmental factors influencing the presence and the growth of the three main photosynthetic groups composing phototrophic biofilms in the Bossea show cave (SW-Italian Alps). The presence and the primary production of cyanobacteria, diatoms and green algae were detected with BenthoTorch®, an instrument for in situ measurement of chlorophyll a concentration that has never been used before in caves. By means of different techniques of regression analysis, we highlighted the response of the three photosynthetic groups to different environmental factors. Illuminance proved to be the main factor influencing positively both the probability of the presence and the productivity of the three groups. The presence of seeping water on the substrate and the distance from the cave entrance proved to play an important role in determining patterns of colonization. By means of GIS techniques, we provide thematic maps of the cave, providing a representation of pattern of the density of the three examined photosynthetic groups within different areas of the cave. The same approach may apply to other show caves, aiming at providing suggestions for the cave management (i.e. cleaning of the cave walls and positioning of artificial lights) and reduce impact caused by tourism. - Highlights: • We used a PAM fluorimeter on autotrophic biofilms in a show cave for the first time. • We modelled the environmental factors influencing phototrophic biofilms. • Illuminance, moisture and distance from the entrance proved to be significant. • We produced thematic maps illustrating our results. • We provide suggestions for cave management

  9. Report for Treating Hanford LAW and WTP SW Simulants: Pilot Plant Mineralizing Flowsheet

    International Nuclear Information System (INIS)

    Olson, Arlin

    2012-01-01

    The US Department of Energy is responsible for managing the disposal of radioactive liquid waste in underground storage tanks at the Hanford site in Washington State. The Hanford waste treatment and immobilization plant (WPT) will separate the waste into a small volume of high level waste (HLW), containing most of the radioactive constituents, and a larger volume of low activity waste (LAW), containing most of the non-radioactive chemical and hazardous constituents. The HLW and LAW will be converted into immobilized waste forms for disposal. Currently there is inadequate LAW vitrification capacity planned at the WTP to complete the mission within the required timeframe. Therefore additional LAW capacity is required. One candidate supplemental treatment technology is the fluidized bed steam reformer process (FBSR). This report describes the demonstration testing of the FBSR process using a mineralizing flowsheet for treating simulated Hanford LAW and secondary waste from the WTP (WTP SW). The FBSR testing project produced leach-resistant solid products and environmentally compliant gaseous effluents. The solid products incorporated normally soluble ions into an alkali alumino-silicate (NaS) mineral matrix. Gaseous emissions were found to be within regulatory limits. Cesium and rhenium were captured in the mineralized products with system removal efficiencies of 99.999% and 99.998 respectively. The durability and leach performance of the FBSR granular solid were superior to the low activity reference material (LMR) glass standards. Normalized product consistency test (PCT) release rates for constituents of concern were approximately 2 orders of magnitude less than that of sodium in the Hanford glass [standard].

  10. An airborne gamma ray survey of parts of SW Scotland in February 1993. Final Report

    International Nuclear Information System (INIS)

    Sanderson, D.C.W.; Allyson, J.D.; Tyler, A.N.; Ni Riain, S.; Murphy, S.

    1994-01-01

    An airborne gamma ray survey was conducted for the Scottish Office Environment Department of coastal and inland parts of SW Scotland to define existing background levels, to locate features worthy of further attention, and to demonstrate the emergency response capabilities of radiometric methods. Coastal areas were surveyed with 500 m line spacing. Inland areas were specified to 2 km line spacing, however it was possible to achieve 1 km line spacing in the majority of the inland zone. The radiometric maps show clearly the distributions of each individual nuclide and indicate the contribution which individual localised features make to the overall gamma ray dose rate. Naturally occurring nuclides reflect the underlying geological and geomorphological contexts of the landscapes. The main granite intrusions, most notably at Cairnsmore of Fleet, the Loch Doon Granodiorite, Glencairn of Carsphairn, the Dalbeattie granite, and Criffel Pluton are readily visible in 40 K, 214 Bi and 208 Tl maps, and control their local radiation environments. A number of areas of enhanced 214 Bi, which may reflect radon potential, were noted. A transient radon associated 214 Bi signal was observed on the west of the Wigtown peninsular during the survey. Examination of spectral data in the vicinity Dundrennan has confirmed that there is no evidence of widespread terrestrial contamination arising from the use of depleted uranium projectiles on the range. The 137 Cs map indicates the environmental distribution of this nuclide in considerable detail. Levels of 137 Cs range from approximately 2 kBq m -2 , a level consistent with global weapons' testing fallout, from 2-40 kBq m -2 on terrestrial sites affected by deposition from the Chernobyl accident, and from 40 kBq m -2 to over 200 kBq m -2 on tide washed pastures which have accumulated marine sediments from the Irish sea. (author)

  11. Assessment of Submarine Slope Stability on the Continental Margin off SW Taiwan

    Science.gov (United States)

    Hsu, Huai-Houh; Dong, Jia-Jyun; Cheng, Win-Bin; Su, Chih-Chieh

    2017-04-01

    The abundant gas hydrate reservoirs are distributed in the southwest (SW) off Taiwan. To explore this new energy, geological methods were systematically used and mainly emphasized on the storage potential evaluation. On the other hand, the correlation between gas hydrate dissociation and submarine slope stability is also an important issue. In this study, three submarine profiles on the active and passive continental margin were selected and assessed their slope stabilities by considering two influence factors (seismic forces and number of sedimentary layers). The gravity corers obtained from these three sites (Xiaoliuqiu, Yuan-An Ridge, and Pointer Ridge) to conduct soil laboratory tests. The physical property tests and isotropically consolidated undrained (CIU) triaxial tests were carried out to establish reference properties and shear strength parameters. Before the stability analysis is performed, it is also necessary to construct the seabed profile. For each submarine profile, data from P-waves and from S-waves generated by P-S conversion on reflection from airgun shots recorded along one line of ocean bottom seismometers were used to construct 2-D velocity sections. The seabed strata could be simplified to be only one sedimentary layer or to be multilayer in accordance with the velocity structure profile. Results show the safety factors (FS) of stability analysis are obviously different in considering the number of sedimentary layers, especially for a very thin layer of sediments on a steep slope. The simplified strata condition which treated all seabed strata as only one sedimentary layer might result in the FS lower than 1 and the slope was in an unstable state. On the contrary, the FS could be higher than 10 in a multilayer condition.

  12. Studying radon exhalation rates variability from phosphogypsum piles in the SW of Spain

    Energy Technology Data Exchange (ETDEWEB)

    López-Coto, I., E-mail: israel.lopez@dfa.uhu.es [Dpto. Física Aplicada, Facultad CC. Experimentales, University of Huelva, Campus de El Carmen s/n, 21007 Huelva (Spain); Mas, J.L. [Dpto. Física Aplicada I. Escuela Politécnica Superior, University of Sevilla, C/Virgen de Africa 7, 41012 Sevilla (Spain); Vargas, A. [Universitat Politècnica de Catalunya, Instituto de Técnicas Energéticas, Campus Sud Edificio ETSEIB, Planta 0, Pabellón C, Av. Diagonal 647, 08028 Barcelona (Spain); Bolívar, J.P. [Dpto. Física Aplicada, Facultad CC. Experimentales, University of Huelva, Campus de El Carmen s/n, 21007 Huelva (Spain)

    2014-09-15

    Highlights: • Variability of radon exhalation rates from PG piles has been studied using numerical simulation supported by experimental data. • Most relevant parameters controlling the exhalation rate are radon potential and moisture saturation. • Piling up the waste increasing the height instead of the surface allows the reduction of the exhalation rate. • A proposed cover here is expected to allow exhalation rates reductions up to 95%. - Abstract: Nearly 1.0 × 10{sup 8} tonnes of phosphogypsum were accumulated during last 50 years on a 1200 ha disposal site near Huelva town (SW of Spain). Previous measurements of exhalation rates offered very variable values, in such a way that a worst case scenario could not be established. Here, new experimental data coupled to numerical simulations show that increasing the moisture contents or the temperature reduces the exhalation rate whilst increasing the radon potential or porosity has the contrary effect. Once the relative effects are compared, it can be drawn that the most relevant parameters controlling the exhalation rate are radon potential (product of emanation factor by {sup 226}Ra concentration) and moisture saturation of PG. From wastes management point of view, it can be concluded that piling up the waste increasing the height instead of the surface allows the reduction of the exhalation rate. Furthermore, a proposed cover here is expected to allow exhalation rates reductions up to 95%. We established that the worst case scenario corresponds to a situation of extremely dry winter. Under these conditions, the radon exhalation rate (0.508 Bq m{sup −2} s{sup −1}) would be below though close to the upper limit established by U.S.E.P.A. for inactive phopsphogypsum piles (0.722 Bq m{sup −2} s{sup −1})

  13. Evaluation of forest structure, biomass and carbon sequestration in subtropical pristine forests of SW China.

    Science.gov (United States)

    Nizami, Syed Moazzam; Yiping, Zhang; Zheng, Zheng; Zhiyun, Lu; Guoping, Yang; Liqing, Sha

    2017-03-01

    Very old natural forests comprising the species of Fagaceae (Lithocarpus xylocarpus, Castanopsis wattii, Lithocarpus hancei) have been prevailing since years in the Ailaoshan Mountain Nature Reserve (AMNR) SW China. Within these forest trees, density is quite variable. We studied the forest structure, stand dynamics and carbon density at two different sites to know the main factors which drives carbon sequestration process in old forests by considering the following questions: How much is the carbon density in these forest trees of different DBH (diameter at breast height)? How much carbon potential possessed by dominant species of these forests? How vegetation carbon is distributed in these forests? Which species shows high carbon sequestration? What are the physiochemical properties of soil in these forests? Five-year (2005-2010) tree growth data from permanently established plots in the AMNR was analysed for species composition, density, stem diameter (DBH), height and carbon (C) density both in aboveground and belowground vegetation biomass. Our study indicated that among two comparative sites, overall 54 species of 16 different families were present. The stem density, height, C density and soil properties varied significantly with time among the sites showing uneven distribution across the forests. Among the dominant species, L. xylocarpus represents 30% of the total carbon on site 1 while C. wattii represents 50% of the total carbon on site 2. The average C density ranged from 176.35 to 243.97 t C ha -1 . The study emphasized that there is generous degree to expand the carbon stocking in this AMNR through scientific management gearing towards conservation of old trees and planting of potentially high carbon sequestering species on good site quality areas.

  14. Management Implications for the Most Attractive Scenic Sites along the Andalusia Coast (SW Spain

    Directory of Open Access Journals (Sweden)

    Alexis Mooser

    2018-04-01

    Full Text Available A coastal scenery assessment was carried out at 50 sites along the 910 km long Andalusia coast (SW Spain using a checklist of 26 natural and human parameters, parameter weighting matrices, and fuzzy logic. A scenic classification was utilised that can rate sites as Class I (natural areas of great scenic beauty to Class V (urbanised areas of poor scenic interest, but, for this study, only natural sites of great scenic value were investigated; 41 sites were included in Class I, 9 in Class II and, apart from four, all of the sites were under some feature of protection—managed by the Andalusia Environmental Agency (RENPA, in Spanish. Sites belong to the Natural Park Cabo de Gata-Nijar (24% of sites, the Natural Park of Gibraltar Strait (18%, the Natural Place Acantilado de Maro-Cerro Gordo (12%, and the Natural and National parks of Doñana (8%. Results obtained by means of scenic evaluation constitute a sound scientific basis for any envisaged management plan for investigated coastal areas preservation/conservation and responsible future developments, especially for natural protected areas, which represent the most attractive coastal tourist destinations. With respect to natural parameters, excellent scenic values appeared to be linked to the geological setting and the presence of mountainous landscapes related to the Betic Chain. Human parameters usually show good scores because null or extremely reduced human impacts are recorded, but, at places, conflicts arose between conservation and recreational activities because visitors are often interested in beach activities more so than ecotourism. Low scores of human parameters were often related to litter presence or the unsuitable emplacement of utilities, such as informative panels, litter bins, etc.

  15. Sedimentological and Stratigraphic Controls on Natural Fracture Distribution in Wajid Group, SW Saudi Arabia

    Science.gov (United States)

    Benaafi, Mohammed; Hariri, Mustafa; Abdullatif, Osman; Makkawi, Mohammed; Korvin, Gabor

    2016-04-01

    The Cambro-Permian Wajid Group, SW Saudi Arabia, is the main groundwater aquifer in Wadi Al-Dawasir and Najran areas. In addition, it has a reservoir potentiality for oil and natural gas in Rub' Al-Khali Basin. Wajid Group divided into four formations, ascending Dibsiyah, Sanamah, Khussyayan and Juwayl. They are mainly sandstone and exposed in an area extend from Wadi Al-Dawasir southward to Najran city and deposited within fluvial, shallow marine and glacial environments. This study aims to investigate the sedimentological and stratigraphic controls on the distribution of natural fractures within Wajid Group outcrops. A scanline sampling method was used to study the natural fracture network within Wajid Group outcrops, where the natural fractures were measured and characterized in 12 locations. Four regional natural fracture sets were observed with mean strikes of 050o, 075o, 345o, and 320o. Seven lithofacies characterized the Wajid Group at these locations and include fine-grained sandstone, coarse to pebbly sandstone, cross-bedded sandstone, massive sandstone, bioturbated sandstone, conglomerate sandstone, and conglomerate lithofacies. We found that the fine-grained and small scale cross-bedded sandstones lithofacies are characterized by high fracture intensity. In contrast, the coarse-grained sandstone and conglomerate lithofacies have low fracture intensity. Therefore, the relative fracture intensity and spacing of natural fractures within Wajid Group in the subsurface can be predicted by using the lithofacies and their depositional environments. In terms of stratigraphy, we found that the bed thickness and the stratigraphic architecture are the main controls on fractures intensity. The outcomes of this study can help to understand and predict the natural fracture distribution within the subsurface fractured sandstone hosting groundwater and hydrocarbon in Wajid and Rub' Al-Khali Basins. Hence, the finding of this study might help to explore and develop the

  16. Diversity and aboveground biomass of lianas in the tropical seasonal rain forests of Xishuangbanna, SW China.

    Science.gov (United States)

    Lü, Xiao-Tao; Tang, Jian-Wei; Feng, Zhi-Li; Li, Mai-He

    2009-01-01

    Lianas are important components of tropical forests and have significant impacts on the diversity, structure and dynamics of tropical forests. The present study documented the liana flora in a Chinese tropical region. Species richness, abundance, size-class distribution and spatial patterns of lianas were investigated in three 1-ha plots in tropical seasonal rain forests in Xishuangbanna, SW China. All lianas with > or = 2 cm diameter at breast height (dbh) were measured, tagged and identified. A total of 458 liana stems belonging to 95 species (ranging from 38 to 50 species/ha), 59 genera and 32 families were recorded in the three plots. The most well-represented families were Loganiaceae, Annonceae, Papilionaceae, Apocynaceae and Rhamnaceae. Papilionaceae (14 species recorded) was the most important family in the study forests. The population density, basal area and importance value index (IVI) varied greatly across the three plots. Strychnos cathayensis, Byttneria grandifolia and Bousigonia mekongensis were the dominant species in terms of IVI across the three plots. The mean aboveground biomass of lianas (3 396 kg/ha) accounted for 1.4% of the total community above-ground biomass. The abundance, diversity and biomass of lianas in Xishuangbanna tropical seasonal rain forests are lower than those in tropical moist and wet forests, but higher than those in tropical dry forests. This study provides new data on lianas from a geographical region that has been little-studied. Our findings emphasize that other factors beyond the amount and seasonality of precipitation should be included when considering the liana abundance patterns across scales.

  17. The Manila clam population in Arcachon Bay (SW France): Can it be kept sustainable?

    Science.gov (United States)

    Dang, Cécile; de Montaudouin, Xavier; Gam, Mériame; Paroissin, Christian; Bru, Noëlle; Caill-Milly, Nathalie

    2010-02-01

    The venerid clam Ruditapes philippinarum is the most prominent suspension-feeding bivalve inhabiting muddy intertidal seagrass beds in Arcachon Bay (SW France). It is exploited by fishermen, and Arcachon Bay ranks number one in France in terms of production and total biomass of this species. Previous studies revealed a decrease in the standing stock of R. philippinarum since 2003 and unbalanced length-frequency distributions with a lack of juveniles and of adults > 40 mm. Consequently, the population dynamics of this bivalve were studied at four intertidal sites and one oceanic site in Arcachon Bay. As clam size structure did not allow classical dynamics computations, field monitoring was coupled with field experiments (tagging-recapture) over two years. Monitoring of condition index and gonadal maturation stages highlighted a high variability in spawning number and intensity between sites. Recruitment events in the exploited area varied spatially but with uniformly low values. Von Bertalanffy Growth Function (VBGF) parameters ( K, L∞) were determined using Appeldoorn and ELEFAN methods. In the exploited sites in the inner lagoon, K was relatively high (mean = 0.72 yr - 1 ) but L∞ was low (mean = 41.1 mm) resulting in a moderate growth performance index (Φ' = 2.99). Growth parameters were not correlated with immersion time and L∞ was different between sites. Comparison of mortality coefficients ( Z) between cage experiments and field monitoring suggested that fishing accounts for 65-75% of total adult mortality. Low recruitment, a low growth rate and a normal mortality rate led to low somatic production (4.1 and 8.7 g Shell-Free Dry Weight (SFDW) m - 2 yr - 1 ) and an annual P/ B ratio from 0.44 to 0.92 yr - 1 . Under current conditions, the possibility of a sustainable population in Arcachon Bay will strongly depend on recruitment success and fishing management.

  18. Characterisation of the heterogeneity of karst using electrical geophysics - applications in SW China

    Science.gov (United States)

    Binley, A. M.; Cheng, Q.; Tao, M.; Chen, X.

    2017-12-01

    The southwest China karst region is one of the largest globally continuous karst areas. The great (structural, hydrological and geochemical) complexity of karstic environments and their rapidly evolving nature make them extremely vulnerable to natural and anthropogenic processes/activities. Characterising the location and properties of structures within the karst critical zone, and understanding how the landform is evolving is essential for the mitigation and adaption to locally- and globally-driven changes. Because of the specific nature of karst geology and geomorphology in the humid tropics and subtropics, spatial heterogeneity is high, evidenced by specific landforms features. Such heterogeneity leads to a high dynamic variability of hydrological processes in space and time, along with a complex exchange of surface water and groundwater. Investigating karst hydrogeological features is extremely challenging because of the three-dimensional nature of the system. Observations from boreholes can vary significantly over several metres, making conventional aquifer investigative methods limited. Geophysical methods have emerged as potentially powerful tools for hydrogeological investigations. Geophysical surveys can help to obtain more insight into the complex conduit networks and depth of weathering, both of which can provide quantitative information about the hydrological and hydrochemical dynamics of the system, in addition to providing a better understanding of how critical zone structures have been established and how the landscape is evolving. We present here results from recent geophysical field campaigns in SW China. We illustrate the effectiveness of electrical methods for mapping soil infil in epikarst and report results from field-based investigations along hillslope and valley transects. Our results reveal distinct zones of relatively high electrical conductivity to depths of tens of metres, which we attribute to localised increased fracture density. We

  19. SPATIAL VARIATIONS OF PAH PROPERTIES IN M17SW REVEALED BY SPITZER /IRS SPECTRAL MAPPING

    Energy Technology Data Exchange (ETDEWEB)

    Yamagishi, M. [Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, Chuo-ku, Sagamihara 252-5210 (Japan); Kaneda, H.; Ishihara, D.; Oyabu, S.; Suzuki, T.; Nishimura, A.; Kohno, M. [Graduate School of Science, Nagoya University, Furo-cho, Chikusa-ku, Nagoya 464-8602 (Japan); Onaka, T.; Ohashi, S. [Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033 (Japan); Nagayama, T.; Matsuo, M. [Graduate School of Science and Engineering, Kagoshima University, 1-21-35 Korimoto, Kagoshima 890-0065 (Japan); Umemoto, T.; Minamidani, T.; Fujita, S. [Nobeyama Radio Observatory, National Astronomical Observatory of Japan (NAOJ), National Institutes of Natural Sciences (NINS), 462-2, Nobeyama, Minamimaki, Minamisaku, Nagano 384-1305 (Japan); Tsuda, Y., E-mail: yamagish@ir.isas.jaxa.jp [Graduate School of Science and Engineering, Meisei University, 2-1-1 Hodokubo, Hino, Tokyo 191-0042 (Japan)

    2016-12-20

    We present Spitzer /IRS mid-infrared spectral maps of the Galactic star-forming region M17 as well as IRSF/SIRIUS Br γ and Nobeyama 45 m/FOREST {sup 13}CO ( J = 1–0) maps. The spectra show prominent features due to polycyclic aromatic hydrocarbons (PAHs) at wavelengths of 6.2, 7.7, 8.6, 11.3, 12.0, 12.7, 13.5, and 14.2  μ m. We find that the PAH emission features are bright in the region between the H ii region traced by Br γ and the molecular cloud traced by {sup 13}CO, supporting that the PAH emission originates mostly from photo-dissociation regions. Based on the spatially resolved Spitzer /IRS maps, we examine spatial variations of the PAH properties in detail. As a result, we find that the interband ratio of PAH 7.7  μ m/PAH 11.3  μ m varies locally near M17SW, but rather independently of the distance from the OB stars in M17, suggesting that the degree of PAH ionization is mainly controlled by local conditions rather than the global UV environments determined by the OB stars in M17. We also find that the interband ratios of the PAH 12.0  μ m, 12.7  μ m, 13.5  μ m, and 14.2  μ m features to the PAH 11.3  μ m feature are high near the M17 center, which suggests structural changes of PAHs through processing due to intense UV radiation, producing abundant edgy irregular PAHs near the M17 center.

  20. A Novel Halotolerant Thermoalkaliphilic Esterase from Marine Bacterium Erythrobacter seohaensis SW-135

    Directory of Open Access Journals (Sweden)

    Ying-Yi Huo

    2017-11-01

    Full Text Available A novel esterase gene, e69, was cloned from Erythrobacter seohaensis SW-135, which was isolated from a tidal flat sediment of the Yellow Sea in Korea. This gene is 825 bp in length and codes for a 29.54 kDa protein containing 274 amino acids. Phylogenetic analysis showed that E69 is a new member of the bacterial lipolytic enzyme family IV. This enzyme exhibited the highest level of activity toward p-nitrophenyl (NP butyrate but little or no activity toward the other p-NP esters tested. The optimum temperature and pH of the catalytic activity of E69 were 60°C and pH 10.5, respectively. The enzyme exhibited stable activity over a wide range of alkaline pH values (7.5–9.5. In addition, E69 was found to be a halotolerant esterase as it exhibited the highest hydrolytic activity in the presence of 0.5 M NaCl and was still active in the presence of 3 M NaCl. Moreover, it possessed some degree of tolerance to Triton X-100 and several organic solvents. Through homology modeling and comparison with other esterases, it was suggested that the absence of the cap domain and its narrow substrate-binding pocket might be responsible for its narrow substrate specificity. Sequence and structural analysis results suggested that its high ratio of negatively to positively charged residues, large hydrophobic surface area, and negative electrostatic potential on the surface may be responsible for its alkaline adaptation. The results of this study provide insight into marine alkaliphilic esterases, and the unique properties of E69 make it a promising candidate as a biocatalyst for industrial applications.

  1. Report for Treating Hanford LAW and WTP SW Simulants: Pilot Plant Mineralizing Flowsheet

    Energy Technology Data Exchange (ETDEWEB)

    Arlin Olson

    2012-02-28

    The US Department of Energy is responsible for managing the disposal of radioactive liquid waste in underground storage tanks at the Hanford site in Washington State. The Hanford waste treatment and immobilization plant (WPT) will separate the waste into a small volume of high level waste (HLW), containing most of the radioactive constituents, and a larger volume of low activity waste (LAW), containing most of the non-radioactive chemical and hazardous constituents. The HLW and LAW will be converted into immobilized waste forms for disposal. Currently there is inadequate LAW vitrification capacity planned at the WTP to complete the mission within the required timeframe. Therefore additional LAW capacity is required. One candidate supplemental treatment technology is the fluidized bed steam reformer process (FBSR). This report describes the demonstration testing of the FBSR process using a mineralizing flowsheet for treating simulated Hanford LAW and secondary waste from the WTP (WTP SW). The FBSR testing project produced leach-resistant solid products and environmentally compliant gaseous effluents. The solid products incorporated normally soluble ions into an alkali alumino-silicate (NaS) mineral matrix. Gaseous emissions were found to be within regulatory limits. Cesium and rhenium were captured in the mineralized products with system removal efficiencies of 99.999% and 99.998 respectively. The durability and leach performance of the FBSR granular solid were superior to the low activity reference material (LMR) glass standards. Normalized product consistency test (PCT) release rates for constituents of concern were approximately 2 orders of magnitude less than that of sodium in the Hanford glass [standard].

  2. Hydrothermal alteration of plagioclase and growth of secondary feldspar in the Hengill Volcanic Centre, SW Iceland

    Science.gov (United States)

    Larsson, D.; Grönvold, K.; Oskarsson, N.; Gunnlaugsson, E.

    2002-05-01

    Dissolution of igneous feldspar and the formation and occurrence of secondary feldspar in tholeiitic basalts from the Hengill volcanic centre, in SW Iceland was studied by microprobe analysis of cuttings from two ca. 2000 m deep geothermal wells. Well NG-7 in Nesjavellir represents a geothermal system in a rift zone where the intensity of young, insignificantly altered intrusions increases with depth. Well KhG-1 in Kolviðarhóll represents the margin of a rift zone where the intensity of intrusives is lower and the intensity of alteration higher. This marginal well represents altered basaltic crust in an early retrograde state. The secondary plagioclase in both wells is mainly oligoclase, occurring in association with K-feldspar and chlorite±actinolite. The texture of this assemblage depends on the lithology and intensity of alteration. In Nesjavellir (NG-7) the composition of secondary albite-oligoclase is correlated with the host-rock composition. This connection is not apparent in more intensely altered samples from Kolviðarhóll (KhG-1). The influence of temperature on composition of secondary Na-feldspar is unclear in both wells although Ca is expected to increase with temperature. Any temperature dependence may be suppressed by the influence of rock composition in Nesjavellir and by retrograde conditions at Kolviðarhóll. The absence of clear compositional gradients between igneous plagioclase and secondary feldspar and between Na-feldspar and K-feldspar suggests that secondary feldspars formed by dissolution precipitation reactions.

  3. The significance of GW-SW interactions for biogeochemical processes in sandy streambeds

    Science.gov (United States)

    Arnon, Shai; De Falco, Natalie; Fox, Aryeh; Laube, Gerrit; Schmidt, Christian; Fleckenstein, Jan; Boano, Fulvio

    2015-04-01

    Stream-groundwater interactions have a major impact on hyporheic exchange fluxes in sandy streambeds. However, the physical complexity of natural streams has limited our ability to study these types of interactions systematically, and to evaluate their importance to biogeochemical processes and nutrient cycling. In this work we were able to quantify the effect of losing and gaining fluxes on hyporheic exchange and nutrient cycling in homogeneous and heterogeneous streambeds by combining experiments in laboratory flumes and modeling. Tracer experiments for measuring hyporheic exchange were done using dyes and NaCl under various combinations of overlying water velocity and losing or gaining fluxes. Nutrient cycling experiments were conducted after growing a benthic biofilm by spiking with Sodium Benzoate (as a source of labile dissolved organic carbon, DOC) and measuring DOC and oxygen dynamics. The combination of experimental observations and modeling revealed that interfacial transport increases with the streambed hydraulic conductivity and proportional to the square of the overlying water velocity. Hyporheic exchange fluxes under losing and gaining flow conditions were similar, and became smaller when the losing or gaining flux increases. Increasing in streambed hydraulic conductivity led to higher hyporheic fluxes and reduction in the effects of losing and gaining flow conditions to constrain exchange. Despite the evident effect of flow conditions on hyporheic exchange, labile DOC uptake was positively linked to increasing overlying water velocity but was not affected by losing and gaining fluxes. This is because microbial aerobic activity was taking place at the upper few millimeters of the streambed as shown by local oxygen consumption rates, which was measured using microelectrodes. Based on modeling work, it is expected that GW-SW interaction will be more significant for less labile DOC and anaerobic processes. Our results enable us to study systematically

  4. Soil respiration in tropical seasonal rain forest in Xishuangbanna, SW China

    Institute of Scientific and Technical Information of China (English)

    SHA; Liqing; ZHENG; Zheng; TANG; Jianwei; WANG; Yinghong

    2005-01-01

    With the static opaque chamber and gas chromatography technique, from January 2003 to January 2004 soil respiration was investigated in a tropical seasonal rain forest in Xishuangbanna, SW China. In this study three treatments were applied, each with three replicates: A (bare soil), B (soil+litter), and C (soil+litter+seedling). The results showed that soil respiration varied seasonally, low from December 2003 to February 2004, and high from June to July 2004. The annual average values of CO2 efflux from soil respiration differed among the treatments at 1% level, with the rank of C (14642 mgCO2· m-2. h-1)>B (12807 mgCO2· m-2. h-1)>A (9532 mgCO2· m-2. h-1). Diurnal variation in soil respiration was not apparent due to little diurnal temperate change in Xishuangbanna. There was a parabola relationship between soil respiration and soil moisture at 1% level. Soil respiration rates were higher when soil moisture ranged from 35% to 45%. There was an exponential relationship between soil respiration and soil temperature (at a depth of 5cm in mineral soil) at 1% level. The calculated Q1o values in this study,ranging from 2.03 to 2.36, were very near to those of tropical soil reported. The CO2 efflux in 2003was 5.34 kgCO2· m-2. a-1 from soil plus litter plus seedling, of them 3.48 kgCO2· m-2. a-1 from soil (accounting for 62.5%), 1.19 kgCO2· m-2. a-1 from litter (22.3%) and 0.67 kgCO2·m-2. a-1 from seedling (12.5%).

  5. Environmental drivers of phototrophic biofilms in an Alpine show cave (SW-Italian Alps)

    Energy Technology Data Exchange (ETDEWEB)

    Piano, E., E-mail: elena.piano@unito.it [Department of Life Sciences and Systems Biology, University of Turin, Via Accademia Albertina 13, 10123 Turin (Italy); Bona, F.; Falasco, E. [Department of Life Sciences and Systems Biology, University of Turin, Via Accademia Albertina 13, 10123 Turin (Italy); La Morgia, V. [ISPRA, via Ca' Fornacetta, 9, 40064 Ozzano dell' Emilia (Italy); Badino, G. [Department of Physics, University of Turin, Via P. Giuria 1, 10125 Turin (Italy); Isaia, M. [Department of Life Sciences and Systems Biology, University of Turin, Via Accademia Albertina 13, 10123 Turin (Italy)

    2015-12-01

    The proliferation of lampenflora is a major threat for the conservation of show caves, since phototrophic organisms cause physical, chemical and aesthetic damage to speleothems. In this paper we examine the environmental factors influencing the presence and the growth of the three main photosynthetic groups composing phototrophic biofilms in the Bossea show cave (SW-Italian Alps). The presence and the primary production of cyanobacteria, diatoms and green algae were detected with BenthoTorch®, an instrument for in situ measurement of chlorophyll a concentration that has never been used before in caves. By means of different techniques of regression analysis, we highlighted the response of the three photosynthetic groups to different environmental factors. Illuminance proved to be the main factor influencing positively both the probability of the presence and the productivity of the three groups. The presence of seeping water on the substrate and the distance from the cave entrance proved to play an important role in determining patterns of colonization. By means of GIS techniques, we provide thematic maps of the cave, providing a representation of pattern of the density of the three examined photosynthetic groups within different areas of the cave. The same approach may apply to other show caves, aiming at providing suggestions for the cave management (i.e. cleaning of the cave walls and positioning of artificial lights) and reduce impact caused by tourism. - Highlights: • We used a PAM fluorimeter on autotrophic biofilms in a show cave for the first time. • We modelled the environmental factors influencing phototrophic biofilms. • Illuminance, moisture and distance from the entrance proved to be significant. • We produced thematic maps illustrating our results. • We provide suggestions for cave management.

  6. Environmental isotope application to investigate the hydrogeological aquifers of Yarmouk basin SW of Syria

    International Nuclear Information System (INIS)

    Al-Charideh, A.

    2002-01-01

    Environmental isotopic variations have been used to investigate the source of recharge and age in the basaltic and deep limestone aquifers system in the Yarmouk basin, SW of Syria. Isotopic results show that recharge of basaltic aquifer is directly related to infiltration of rainwater from high and transitional zones. However, the homogeneity noted of stable and radioactive isotopes values (δ 18 O= -5.58± 0.25%, 14 C=46.2± 4.45 % pmc) in Laja plateau and central zone, confirm the mechanism of common recharge and critical role of this plateau in absorbing great amount of precipitation. In addition these values indicate, to a high rate mixing taking place in this plateau and the central zone. In the Kahiel area, the groundwater is of recent age as shown from the high values of 14 C activity ( 14 C= 66.3 ± 5.3 % pcm) accompanied by enriched 18 O (δ 18 O=-4.7±0.22 %). The recharge of groundwater is related to the leakage of water from dams and drainage network. The tectonic setting in this area constitutes an additional factor in increasing this recharge. Netpath model was used to determine the age of groundwater. the age of groundwater in the basaltic aquifer is generally modern and reaches 2000 y BP in discharge area. Preliminary conclusion of deep limestone aquifer, indicate that its groundwater occur under high piezometric pressure. The salinity is less than 1g/L and the temperature water varied between 35 to 45 degreed centigrade. The low 14 C activities in deep groundwater suggest pleistocene and holocene recharge, although their stable isotopes values indicate recharge by modern meteoric precipitation. The corrected age of this groundwater determined by Netpath model indicate that this age fall between recent water in recharge area and 20 Ky BP. (author)

  7. A palynostratigraphic approach to the SW Anatolian molasse basin: Kale-Tavas molasse and Denizli molasse

    Science.gov (United States)

    Akgün, Funda; Sözbilir, Hasan

    The study, explains stratigraphy of the Oligo-Miocene molasse around the Denizli province (SW Anatolia), based on the palynology which is also supported by the detailed mapping and correlation of the measured sections from the coal-bearing sequences of the molasse deposits. For this purpose, two huge depressions named as the Kale-Tavas molasse and Denizli molasse basins were examined. The Kale-Tavas molasse deposits has a basal unconformity with the underlying pre-Oligocene basement and begins with the Chattian Karadere and Mortuma formations which are covered unconformably by the Aquitanian Yenidere formation. An angular unconformity between the Chattian and the Burdigalian is only observed in the middle part of the basin, around Kale. In the Tavas section, the Aquitanian and the Burdigalian are absent. The Denizli molasse is characterized by Chattian-Aquitanian sequence consisting of distinctive sedimentary facies, alluvial fan and deltaic-shallow marine deposits with carbonate patch reefs. Palynostratigraphic studies, which have given the Chattian age, have been carried out from the coal lenses of alluvial fan and delta plain deposits. In addition to the palynological determinations, coral and foraminiferal content of the carbonate patch reefs which rest conformably on the coal-bearing sequences have yielded the Chattian-Aquitanian age. Two different palynomorph associations have been determined from the molasse deposits. The first palynomorph association which is established in the samples from the Sağdere and Mortuma formations, corresponds to the Chattian age, whilst the second is of the Aquitanian age. The Late Oligocene-Early Miocene which is claimed as the time of N-S-extensional tectonics in western Turkey, is related to the depositional time of the molasse sequences in the study area. Thus, the molasse is older than the basal deposits of the Gediz and Büyük Menderes grabens.

  8. Legacy effects of nitrogen and phosphorus in a eutrophic lake catchment: Slapton Ley, SW England

    Science.gov (United States)

    Burt, T. P.; Worrall, F.; Howden, N. J. K.

    2017-12-01

    Slapton Ley is a freshwater coastal lagoon in SW England. The Ley is part of a National Nature Reserve, which is divided into two basins: the Higher Ley (39 ha) is mainly reed swamp; the Lower Ley (77 ha) is a shallow lake (maximum depth 2.9 m). In the 1960s it became apparent that the Lower Ley was becoming increasingly eutrophic. In order to gauge water, sediment and nutrient inputs into the lake, measurements began on the main catchments in 1969. Continuous monitoring of discharge and a weekly water-sampling programme have been maintained by the Slapton Ley Field Centre ever since. The monitoring programme has been supplemented by a number of research projects which have sought to identify the salient hydrological processes operating within the Slapton catchments and to relate these to the delivery of sediment and solute to the stream system. Long-term monitoring data are also available for the catchment area including the lake from the Environment Agency.The nitrate issue has been of particular interest at Slapton; although many longer series exist for large river basins like the Thames, the long record of nitrate data for the Slapton catchments is unique in Britain for a small rural basin. Recent declines in nitrate concentration may reflect less intensive agricultural activity, lower fertiliser inputs in particular, but there may also be a legacy effect in the shallow groundwater system. Phosphorus concentrations in stream and lake water have also shown declining concentrations but a phosphorus legacy in the surficial lake sediments means that algal blooms continue to develop in most summers, as indicated by a continued rise in summer pH levels. Further field observation at the sediment-water interface is needed to better understand the biogeochemical drivers and the balance between N and P limitation in the lake. Successful management of the Nature Reserve requires better understanding of the links between hydrological and biogeochemical processes operating

  9. Modeling Oligo-Miocence channel sands (Dezful Embayment, SW Iran): an integrated facies classification workflow

    International Nuclear Information System (INIS)

    Heydari, Mostafa; Maddahi, Iradj; Moradpour, Mehran; Esmaeilpour, Sajjad

    2014-01-01

    This study has been conducted on Mansuri onshore oilfield located in Dezful Embayment, south-west Iran. One of the hydrocarbon-bearing formations is a Oligo-Miocene Asmari formation—the most prolific Iranian reservoir rock. Like many other oilfields in the area, the trap in this field is deemed structural (anticline), formed during the collision of the Arabian plate with the Iranian plate and the folding of Neotethys deposits with a NW–SE trend. This study integrates three different quantitative studies from geology, geophysics and petrophysics disciplines to quantitate ‘the qualitative study of seismic facies analysis based on trace shapes and 3D multi-attribute clustering’. First, stratigraphic sequences and seismic detectable facies were derived at one well location using the available high resolution core facies analysis and depositional environment assessment reports. Paleo and petrophysical logs from other wells were subsequently used for the extrapolation of stratigraphic sequences interpreted at the first well. Utilizing lithology discrimination obtained by wire-line log interpretation, facies were extrapolated to all wells in the area. Seismic 3D attribute analysis and seismic facies classification established a 3D facies volume accordingly, which was finally calibrated to geological facies at well locations. The ultimate extracted facies-guided geobody shows that good reservoir-quality channel sands have accumulated with NW/SE elongation at the ridge of the structure. As a result, this type of geometry has created a stratigraphic/structural hydrocarbon trap in this oilfield. Moreover, seismic facies analysis shows that buried channels do not parallel the predominant Arabian plate-originated channels (with SW–NE trends) in SW Zagros and are locally swerved in this area. (paper)

  10. TGF-β1 increases invasiveness of SW1990 cells through Rac1/ROS/NF-κB/IL-6/MMP-2

    International Nuclear Information System (INIS)

    Binker, Marcelo G.; Binker-Cosen, Andres A.; Gaisano, Herbert Y.; Cosen, Rodica H. de; Cosen-Binker, Laura I.

    2011-01-01

    Research highlights: → Rac1 mediates TGF-β1-induced SW1990 invasion through MMP-2 secretion and activation. → NADPH-generated ROS act downstream of Rac1 in TGF-β1-challenged SW1990 cells. → TGF-β1-stimulated ROS activate NF-κB in SW1990 cells. → NFκB-induced IL-6 release is required for secretion and activation of MMP-2 in SW1990 cells. -- Abstract: Human pancreatic cancer invasion and metastasis have been found to correlate with increased levels of active matrix metalloproteinase 2 (MMP-2). The multifunctional cytokine transforming growth factor beta 1 (TGF-β1) has been shown to increase both secretion of MMP-2 and invasion by several pancreatic cancer cell types. In the present study, we investigated the signaling pathway involved in TGF-β1-promoted MMP-2 secretion and invasion by human pancreatic cancer cells SW1990. Using specific inhibitors, we found that stimulation of these tumor cells with TGF-β1 induced secretion and activation of the collagenase MMP-2, which was required for TGF-β1-stimulated invasion. Our results also indicate that signaling events involved in TGF-β1-enhanced SW1990 invasiveness comprehend activation of Rac1 followed by generation of reactive oxygen species through nicotinamide adenine dinucleotide phosphate-oxidase, activation of nuclear factor-kappa beta, release of interleukin-6, and secretion and activation of MMP-2.

  11. TGF-{beta}1 increases invasiveness of SW1990 cells through Rac1/ROS/NF-{kappa}B/IL-6/MMP-2

    Energy Technology Data Exchange (ETDEWEB)

    Binker, Marcelo G. [Departments of Medicine and Physiology, University of Toronto, Toronto, Ontario, Canada M5S 1A8 (Canada); CBRHC Research Center, Buenos Aires (Argentina); Binker-Cosen, Andres A. [CBRHC Research Center, Buenos Aires (Argentina); Gaisano, Herbert Y. [Departments of Medicine and Physiology, University of Toronto, Toronto, Ontario, Canada M5S 1A8 (Canada); Cosen, Rodica H. de [CBRHC Research Center, Buenos Aires (Argentina); Cosen-Binker, Laura I., E-mail: laura.cosen.binker@utoronto.ca [Departments of Medicine and Physiology, University of Toronto, Toronto, Ontario, Canada M5S 1A8 (Canada); CBRHC Research Center, Buenos Aires (Argentina)

    2011-02-04

    Research highlights: {yields} Rac1 mediates TGF-{beta}1-induced SW1990 invasion through MMP-2 secretion and activation. {yields} NADPH-generated ROS act downstream of Rac1 in TGF-{beta}1-challenged SW1990 cells. {yields} TGF-{beta}1-stimulated ROS activate NF-{kappa}B in SW1990 cells. {yields} NF{kappa}B-induced IL-6 release is required for secretion and activation of MMP-2 in SW1990 cells. -- Abstract: Human pancreatic cancer invasion and metastasis have been found to correlate with increased levels of active matrix metalloproteinase 2 (MMP-2). The multifunctional cytokine transforming growth factor beta 1 (TGF-{beta}1) has been shown to increase both secretion of MMP-2 and invasion by several pancreatic cancer cell types. In the present study, we investigated the signaling pathway involved in TGF-{beta}1-promoted MMP-2 secretion and invasion by human pancreatic cancer cells SW1990. Using specific inhibitors, we found that stimulation of these tumor cells with TGF-{beta}1 induced secretion and activation of the collagenase MMP-2, which was required for TGF-{beta}1-stimulated invasion. Our results also indicate that signaling events involved in TGF-{beta}1-enhanced SW1990 invasiveness comprehend activation of Rac1 followed by generation of reactive oxygen species through nicotinamide adenine dinucleotide phosphate-oxidase, activation of nuclear factor-kappa beta, release of interleukin-6, and secretion and activation of MMP-2.

  12. Participación electoral femenina en la victoria del Frente Popular y su contribución a la protesta social en la primavera del 36

    Directory of Open Access Journals (Sweden)

    Paloma Seoane Amigo

    2012-01-01

    Full Text Available Se pretende con el presente estudio poner el acento en lo denunciado, tantas veces, en la historiografía de género como «invisibilidad femenina», con el objetivo último de comprender la problemática socio-política a la que se ha visto subyugada la mujer durante el lapso de tiempo que transcurre desde el triunfo del Frente Popular hasta los comienzos de la Guerra Civil. Todo ello con la intención de contribuir intelectualmente al esfuerzo iniciado por otras colegas historiadoras en la materia, enfatizando en aquellos aspectos menos conocidos, o en aquellos otros que han pasado más desapercibidos en determinados círculos académicos. La mujer participa activamente en la vida política republicana, su voto es decisivo en la victoria del Frente Popular; así mismo, es destacable su creciente influencia en el entorno sindical, siendo víctima por este motivo de la represión franquista posterior. Durante el estudio destacamos la activa participación de la mujer republicana y de izquierdas en la campaña electoral de 1936, y su intervención en la conflictividad sociolaboral durante la primavera de 1936. La mujer juega un papel relevante en la campaña electoral, apoyando las listas del Frente Popular. Muchas mujeres hicieron su propia «campaña» particular, con actos de apoyo al Frente Popular y en pro de la amnistía; recorriendo todo el país, impulsando y encabezando numerosos actos electorales. Basaron fundamentalmente sus acciones en cuestiones de naturaleza económica y en todo aquello relacionado con la lucha política clásica.The paper emphasizes the «female historical invisibility», many times reported in Gender Historiography, with the ultimate goal of understanding the socio-politic causes that have subjugated women during the period elapsed since the victory of the Frente Popular to the begining of the Spanish Civil War. This paper is, also, to add a small contribution to the significant effort developed by some colleagues

  13. Validação do Inventário de Atitudes frente à Dor Crônica - profissionais Validación del Inventario de Actitudes Frente al Dolor Crónico - Profesionales Validation of the survey of pain attitudes - professionals

    Directory of Open Access Journals (Sweden)

    Dayse Maioli Garcia

    2007-12-01

    Full Text Available Crenças influem no modo de as pessoas interpretarem os eventos e se conduzirem frente a eles. O objetivo deste estudo foi validar instrumento para identificar as crenças/atitudes de profissionais de saúde frente à dor crônica. O Inventário de Atitudes frente à Dor-Profissionais, adaptado do Inventário de Atitudes frente à Dor-Breve (IAD-Breve utilizado para doentes , foi respondido por 75 profissionais de Centros de Dor (idade média = 42,8 anos; tempo médio após graduação = 16 anos; médicos = 58,7% e fisioterapeutas = 42,7%; com especialização com maior grau de formação = 42,7% e mestrado/doutorado = 26,7%. O IAD-Profissionais foi validado com 20 itens e a análise fatorial con-firmou 6 domínios (emoção, controle, incapacidade, solicitude, cura médica e dano físico. A confiabilidade dos domínios variou entre 0,567 a 0,807 (alfa de Cronbach. Disponibiliza-se instrumento que auxiliará na organização de ações educativas.Las creencias influyen en el modo en que las personas interpretan los eventos y se conducen frente a ellos. El objetivo de este estudio fue validar un instrumento para identificar las creencias/actitudes de profesionales de salud frente al dolor crónico. El Inventario de Actitudes frente al Dolor - Profesionales, adaptado del Inventario de Actitudes frente al Dolor-Breve (IAD-Breve utilizado para enfermos, fue respondido por 75 profesionales de Centros de Dolor (edad media = 42,8 años; tiempo medio después del pre-grado = 16 años; médicos = 58,7% y fisioterapeutas = 42,7%; con especialización com mayor grado de formación = 42,7% y maestría/doctorado=26,7%. El IAD-Profesionales fue validado con 20 ítems y el análisis factorial confirmó 6 dominios (emoción, control, incapacidad, solicitud, cura médica y daño físico. La confiabilidad de los dominios varió entre 0,567 a 0,807 (alfa de Cronbach. Está a disposición un instrumento que auxiliará en la organización de acciones educativas

  14. Development and validation of a scale of attitudes towards alcohol, alcoholism and alcoholics Construcción y validez de una escala de actitudes frente al alcohol, al alcoholismo y al alcohólico Construção e validação de uma escala de atitudes frente ao álcool, ao alcoolismo e ao alcoolista

    Directory of Open Access Journals (Sweden)

    Divane de Vargas

    2008-10-01

    Full Text Available The objective of this study was the construction and validation of a scale that would measure the attitudes towards alcohol, alcoholism and the alcoholic, called the Scale of Attitudes Towards Alcohol, Alcoholism and the Alcoholic. The face and content validations, as well as the factor analysis of the data obtained in a preliminary test with 144 nursing students resulted in a scale consisting of 96 items, divided into 5 factors: Attitudes towards the alcoholic person: care and interpersonal relations; Etiology; Disease; Repercussions deriving from alcohol use/abuse; Alcoholic beverages. The general scale presented a consistency level of 0.90. The resulting instrument is concluded to be a reliable tool to evaluate attitudes towards alcohol, alcoholism and alcohol addicts.Este estudio tuvo como objetivo construir y validar un instrumento de medida de Actitudes frente al Alcohol, al Alcoholismo y al Alcohólico: Escala de Actitudes frente al Alcohol, al Alcoholismo y al Alcohólico. La validez aparente y de contenido del instrumento, así como el análisis factorial de los datos de su aplicación preliminar a un total de 144 estudiantes de enfermería, resultaron en una escala compuesta por 96 ítems divididos en cinco factores agrupados bajo el nombre de Actitudes frente al alcohólico: el trabajo y las relaciones interpersonales; la Etiología; la Enfermedad; las Repercusiones provenientes del uso/abuso del alcohol; y, la Bebida alcohólica. La Escala general presentó una consistencia interna de 0,90; se concluyó que el instrumento construido se mostró confiable para la evaluar las actitudes frente al alcohol, al alcoholismo y al alcohólico.Este estudo teve como objetivo construir e validar instrumento de medida de atitudes frente ao álcool, ao alcoolismo e ao alcoolista (escala de atitudes frente ao álcool, ao alcoolismo e ao alcoolista. A validação aparente e de conteúdo do instrumento, bem como a análise fatorial dos dados de sua

  15. Atitudes de estudantes de enfermagem frente questões relacionadas ao álcool, alcoolismo e alcoolista Actitudes de estudiantes de enfermería frente a cuestiones relacionadas al álcool, alcoolismo e alcoolista Attitudes of nursing students facing questions related to alcohol, alcoholism and the alcoholic

    Directory of Open Access Journals (Sweden)

    Divane de Vargas

    2011-01-01

    Full Text Available OBJETIVO: Examinar as atitudes de uma amostra de estudantes de enfermagem frente ao álcool, alcoolismo e alcoolista. MÉTODOS: Estudo exploratório realizado com 144 estudantes do último ano de graduação em enfermagem de duas escolas do setor privado da cidade de Ribeirão Preto - SP. Para a coleta de dados, utilizou-se a Escala de atitudes frente álcool, alcoolismo e alcoolista. RESULTADOS: as atitudes frente ao alcoolista foram mais negativas do que aquelas que vêm sendo reportadas na literatura. A maioria dos participantes considerou o alcoolista culpado por seus problemas de saúde e preferiu não trabalhar com esse tipo de paciente. CONCLUSÃO: As atitudes dos estudantes frente às questões relacionadas ao álcool e alcoolismo tendem à ambivalência e à negatividade, o que pode ser atribuído à falta de preparo recebida durante a graduação. Apesar das recomendações feitas pelos especialistas no País pouco tem sido investido na formação do enfermeiro em álcool e outras drogas sobretudo nas escolas privadas.OBJETIVO: Examinar las actitudes de una muestra de estudiantes de enfermería frente al alcohol, alcoholismo y al alcohólico. MÉTODOS: Estudio exploratorio realizado con 144 estudiantes del último año del pregrado en enfermería de dos escuelas del sector privado de la ciudad de Ribeirão Preto - SP. Para la recolección de datos, se utilizó la Escala de Actitudes frente al alcohol, alcoholismo y alcohólico. RESULTADOS: las actitudes frente al alcoholismo fueron más negativas que aquellas que vienen siendo reportadas en la literatura. La mayoría de los participantes consideró al alcohólico culpable por sus problemas de salud y prefirió no trabajar con este tipo de paciente. CONCLUSIÓN: Las actitudes de los estudiantes frente a las cuestiones relacionadas al alcohol y alcoholismo tienden a la ambivalencia y a la negatividad, el que puede ser atribuído a la falta de preparación recibida durante el pregrado. A

  16. Cartografía de vulnerabilidad frente a inundaciones en llanos mediterráneos. Caso de estudio del Barranc de Carraixet y Rambla de Poyo

    OpenAIRE

    Camarasa Belmonte, Ana María; López García, María José; Soriano García, Julián

    2008-01-01

    Este trabajo aborda la cartografía de vulnerabilidad frente a inundaciones, en dos pequeños llanos mediterráneos pertenecientes al Barranc de Carraixet y la Rambla de Poyo. Ambos forman parte del Área Metropolitana de Valencia, integrando las comarcas de l¿Horta Nord y l¿Horta Sud, respectivamente. Constituye un ensayo metodológico, basado en estimadores socioeconómicos sencillos, obtenidos a partir de los usos del suelo. La vulnerabilidad se evalúa en función del valor económico del suelo y ...

  17. Comportamiento frente a la corrosión y biocompatibilidad in vitro/in vivo de la aleación AZ31 modificada superficialmente

    OpenAIRE

    Carboneras, M.; Pérez-Maceda, B. T.; Valle, Jorge del; García-Alonso, M. C.; Alobera, M. A.; Clemente, Carmen; Rubio, J. C.; Escudero Rincón, María Lorenza; Lozano, R.M.

    2011-01-01

    [ES] En el presente trabajo se ha estudiado el comportamiento frente a la corrosión y la biocompatibilidad in vitro/in vivo de la aleación de magnesio AZ31, cuyas propiedades mecánicas son superiores a los requisitos mecánicos del hueso. La aleación en estado de recepción ha mostrado una cinética de corrosión no compatible con el crecimiento celular. Para mejorar su comportamiento, el material ha sido modificado superficialmente mediante tratamiento de conversión química en ácido fluorhídr...

  18. EL PROBLEMA DEL ACOSO MORAL EN INSTITUCIONES PÚBLICAS Y PRIVADAS FRENTE A LA PROTECCION DE LOS DERECHOS DEL TRABAJADOR, AREQUIPA 2012

    OpenAIRE

    SALAZAR MOTTA, CARLOS MANUEL

    2014-01-01

    EL PROBLEMA DEL ACOSO MORAL DEL TRABAJADOR EN EL PERÚ NOCIONES SOBRE ACOSO MORAL AL TRABAJADOR ANTECEDENTES HISTÓRICOS CONCEPTUALIZACIÓN DE MOBBING RASGOS DEL ACOSADOR DESDE EL PUNTO DE VISTA PSICOSOCIAL DIFERENCIA ENTRE MERO ACOSO Y ACOSO MORAL SUJETOS DEL ACOSO MORAL ELEMENTOS INTEGRANTES DEL ACOSO MORAL TIPOLOGÍA Y FENÓMENOS SIMILARES EN EL ENTORNO DEL ACOSO MORAL LA REACCIÓN DEL ORDENAMIENTO JURÍDICO - LABORAL FRENTE AL ACOSO EFECTOS DEL ACOSO MORAL PROTECCIÓN DE LOS DERECHOS DEL TRABAJAD...

  19. Repercusiones fisiológicas del uso de equipos de protección individual frente a riesgos biológicos sobre los trabajadores de la salud

    OpenAIRE

    Martín Rodríguez, Francisco

    2017-01-01

    Para ello, se ha realizado un estudio quasiexperimental no controlado sobre 96 voluntarios elegidos mediante un muestreo aleatorio estratificado por sexo, nivel de formación y categoría profesional, de una muestra de oportunidad de 164 voluntarios. Con mediciones antes/después de parámetros de bioimpedancia y antropometría y toma de contantes vitales antes/depués. Los voluntarios fueron equipados con un EPI frente a riesgos biológicos y monitorizados, realizando un caso de reanimación cardíac...

  20. Estudio de un IDS Open Source frente a herramientas de análisis y explotación de vulnerabilidades

    OpenAIRE

    Gascón Polanco, Hugo

    2010-01-01

    Ante el vertiginoso ritmo de cambio inherente al mundo de la seguridad de los sistemas de información y la necesidad constante de actualización de los sistemas implicados en la misma, surge la motivación original de este proyecto: analizar la respuesta desde un punto de vista tanto teórico como práctico de Snort, un sistema de detección de intrusiones en red open source de amplia difusión, frente a herramientas de explotación y detección de vulnerabilidades. El sistema de detección de intrusi...

  1. Beneficios de la terapia con resistómetro inspiratorio en los pacientes con esclerosis multiple frente a terapias respiratorias convencionales

    OpenAIRE

    Martín Sánchez, Carlos

    2016-01-01

    [ES] La Universidad de Salamanca (USAL) a través del programa de Doctorado en Oncología Clínica realiza un estudio con ASPRODES, la Asociación Salmantina de Esclerosis Múltiple (ASDEM) y la Asociación Zamorana de Esclerosis Múltiple (AZDEM) para llevar a cabo un estudio experimental con el fin de analizar las ventajas que la terapia respiratoria con resistómetro inspiratorio puede aportar a los pacientes con Esclerosis Múltiple frente a las técnicas de fisioterapia respiratoria convencional. ...

  2. DEFORMACION CORTICAL Y PELIGRO SISMICO ASOCIADO A LA FALLA SAN RAMON EN EL FRENTE CORDILLERANO DE SANTIAGO, CHILE CENTRAL (33°S)

    OpenAIRE

    RAULD PLOTT, RODRIGO ANDRES; RAULD PLOTT, RODRIGO ANDRES

    2011-01-01

    1) El orógeno Andino es fundamentalmente bi-vergente, incluyendo un gran sistema de fallas inversas cabalgantes en el frente occidental chileno, que son sintéticas con respecto al acoplamiento tectónico causante de la orogenia Andina (subducción de la placa Nazca, oceánica, bajo la placa Sudamericana, continental); 2) El funcionamiento del Cabalgamiento Andino Occidental (West Andean Thrust, WAT), documentado por la estructura con vergencia oeste de la Cordillera Principal en Chile, tiene ...

  3. Determinación del esfuerzo de muestreo requerido para el estimado de procucción de huevos de anchoveta Engraulis ringens, frente al Perú

    OpenAIRE

    Santander, Haydeé; Smith, Paul E.; Alheit, Juergen

    1982-01-01

    Para obtener una primera aproximación del número de muestras requerido para un determinado nivel de precisión del estimado de producción de huevos de anchoveta por unidad de área superficial del mar, se han utilizado datos existentes de muestras de huevos provenientes de exploraciones efectuadas frente al Perú en los últimos 20 años. La anchoveta parece desovar en cardúmenes, produciendo una gran can­ tidad de huevos, de los que las muestras toman una pequeña proporción. Aproximadamente e...

  4. INFLUENCIA DE LA EDUCACIÓN Y LA CULTURA EN LA VULNERABILIDAD FRENTE A LOS DESASTRES, DESDE UNA PERSPECTIVA PSICOLÓGICA

    OpenAIRE

    Giraldo García, Angela María

    2015-01-01

    Desde la línea de investigación en Psicología Clínica y Procesos de salud, que se adelanta desde el Programa de Psicología de la Universidad de Manizales, esta investigación tiene en cuenta la educación y la cultura como aspectos propicios para abordar el tema de vulnerabilidad; se reconoce además su complejidad y la necesidad de encontrar estrategias que permitan, por medio de estos escenarios, disminuir la vulnerabilidad frente al riesgo de desastre. Se pretende plasmar una perspectiva basa...

  5. Análisis del nivel de ansiedad frente a la muerte en el personal de enfermería: comparativa pediatría-adultos.

    OpenAIRE

    Viloria López, Jennifer

    2017-01-01

    La muerte o el proceso de morir ocasionan ansiedad no solamente en pacientes y familiares, sino también en los profesionales de enfermería, que podrían llegar a desarrollar problemas de tipo personal y una disminución en la calidad de los cuidados ofrecidos. Esta respuesta podría verse incrementada en profesionales que atienden a pacientes pediátricos. Por ello, el objetivo del presente estudio fue evaluar los grados de ansiedad frente a la muerte en los profesionales de enfermería que trabaj...

  6. Las pymes y el proceso de internacionalización : factores determinantes de su actitud frente a la exportación

    OpenAIRE

    Hurtado Torres, Nuria Esther

    2013-01-01

    El objetivo principal de la tesis es profundizar en el conocimiento de la estrategia de exportación y de aquellos factores que explican la adopción de la misma. A nivel empírico se estudia en las pequeñas y medianas empresas, por un lado, las características propias y de su director general que condicionan la percepción de barreras y la eficacia de la medidas de apoyo, y por otro, los factores determinantes de la actitud de la dirección frente a la exportación. Para cubrir este segundo objeti...

  7. Representaciones mentales de los docentes de básica primaria frente a la modernidad y la tecnología

    OpenAIRE

    Charria Suarez, Edien Julián; Castaño Castro, Norma Graciela; Lavao González, Francisco Javier; Álvarez Sepúlveda, Adriana Patricia

    2016-01-01

    Tesis (Maestría en Educación desde la Diversidad). Universidad de Manizales. Facultad de Ciencias Sociales y Humanas. Instituto Pedagógico, 2016 Pensar en transformaciones educativas, permite indagar todos los elementos que intervienen en el proceso educativo. Esta investigación de corte cualitativo con enfoque socio - histórico, se desarrolló buscando comprender las representaciones mentales frente a la modernidad y la tecnología, para educar desde la diversidad de los docentes d...

  8. A qualidade do sono, o aproveitamento escolar e o stress em adolescentes que permacem em frente ao computador durante a noite

    OpenAIRE

    Gema Galgani de Mesquita Duarte

    2007-01-01

    Resumo: A qualidade do sono, o aproveitamento escolar e o stress em adolescentes que permanecem em frente ao computador durante a noite. 2007. 234p. Professor Doutor Rubens Nelson Amaral de Assis Reimão. Dissertação (Mestrado) - Universidade Estadual de Campinas, Faculdade de Ciências Médicas, Departamento da Saúde da Criança e do Adolescente. INTRODUÇÃO: O sono representa importante papel na vida do homem, influenciando as condições físicas, psicológicas e sociais. Está intimamente ligado ao...

  9. Empresariado industrial e desenvolvimento socioeconômico: estudo do discurso do empresariado calçadista paulista frente ao mundo globalizado (1995-2010)

    OpenAIRE

    Guaraldo, Paula D'Andrea [UNESP

    2014-01-01

    A tese teve como objetivo desenvolver um estudo sobre a fração da classe empresarial brasileira composta pelo empresariado industrial calçadista. A proposta foi conhecer o discurso do empresariado calçadista paulista dos polos produtores calçadistas de Franca, Birigui e Jaú, frente às questões ligadas ao desenvolvimento econômico no contexto globalizado em que se encontra, por meio da análise de suas manifestações públicas em veículos de comunicação voltados ao empresariado nacional sobre o p...

  10. Comparación de carga inmediata frente a carga convencional de implantes inmediatos con prótesis fijas de arco completo

    OpenAIRE

    Peñarrocha Oltra, David

    2014-01-01

    Comparación de carga inmediata frente a carga convencional de implantes inmediatos con prótesis fijas de arco completo. OBJETIVOS El propósito del estudio fue evaluar las diferencias entre los protocolos de carga inmediata y carga convencional para rehabilitar a pacientes con el maxilar o la mandíbula parcialmente desdentados en los que esté indicada la extracción de todos los dientes remanentes, con prótesis fijas de arco completo sobre implantes dentales inmediatos y no inmediatos, e...

  11. Análisis de la ayuda humanitaria de la ONU (FAO y PMA) frente a la crisis alimentaria en Somalia 2007-2011

    OpenAIRE

    Torrado Soto, Jacklyn Joelle

    2013-01-01

    Dado que actualmente las instituciones internacionales después de la reconfiguración del sistema tras el fin de la Segunda Guerra Mundial y materializado aún más después de la Guerra Fría, han cobrado un papel alterno fundamental; es necesario entender el trasfondo de las intervenciones que ha realizado las Naciones Unidas (ONU) en Somalia frente a la crisis alimentaria. Teniendo como precedente dos intervenciones fallidas, la iniciativa actual de asistencia humanitaria de las instituciones a...

  12. Conceptos indígenas de la formación territorial y Etno-Político frente al Estado Republicano-Nacional

    OpenAIRE

    Fischer, Eva

    2003-01-01

    Presentación La multiculturalidad de la Ciudad de México y los Derechos Indígenas Oehmichen, Cristina Conceptos indígenas de la formación territorial y Etno-Político frente al Estado Republicano-Nacional Fischer, Eva Disputas matrimoniales y cambio social en Coyutla, Veracruz (México) Chenaut, Victoria El debate indio sobre la ciudadanía multicultural en México: La revuelta por la dignidad Valladares de la Cruz, Laura Análisis de las actitudes de políticos criollos ...

  13. Impactos de la institucionalización en la vejez. Análisis frente a los cambios demográficos actuales

    OpenAIRE

    Guevara-Peña, Nora Liliana

    2016-01-01

    El presente artículo es producto de la investigación Dignidad en la vejez: el caso de las personas mayores institucionalizadas en el Centro de Protección Social Bello Horizonte de Bogotá. Tiene como finalidad dar cuenta de uno de los resultados de la investigación frente a los impactos de institucionalizar a personas mayores, pero a su vez presentar alternativas ante esta modalidad, que se ha convertido en la primera opción para las familias, dados los cambios demográficos, el desconocimiento...

  14. Desenvolvimento economico local em Porto Alegre e Santo Andre : um estudo sobre o papel das administrações municipais frente ao mainstream politico e academico conservador

    OpenAIRE

    Kleyferson Porto de Araujo

    2004-01-01

    Resumo:Esta dissertação tem por objetivo estudar como as políticas de desenvolvimento econômico local de dois importantes municípios brasileiros, governados por partidos de esquerda, estão se comportando frente ao mainstream político e acadêmico conservador, configurado pelo Banco Mundial. Para tanto, foram descritas e analisadas as políticas de desenvolvimento econômico local propostas pelo Banco Mundial e pelas administrações municipais de Porto Alegre e de Santo André. Inicialmente, são di...

  15. Gluteoplastia de aumento: a importância do ensino na formação atual do residente frente à demanda crescente

    OpenAIRE

    Lima, Diogo Almeida; Minakami, Daniel Akira; Pereira, Lucas Chagas; Grando, Maieve Corralo; Cruz, Ricardo Souza; Braga, André Ramalho; Almeida Neto, Enéas Cardoso de; Guimarães, Rodrigo Araújo; Almeida, Ronaldo Carrara de; Souza Neto, Acrysio Peixoto de; Haesbaert, Cristiam Machado; Grave, Márcio; Zambenedetti, Ricardo Morgental; Cardoso, Marcelo Moreira; Resende, José Humberto Cardoso

    2011-01-01

    INTRODUÇÃO: Frente ao aumento na demanda por gluteoplastia de aumento com implantes nos últimos anos, é importante que haja profissionais treinados e capacitados para realizar tal procedimento e suas associações com lipoaspiração/lipoenxertia, com o intuito final de melhorar o contorno do quadril. MÉTODO: Ao ver na residência médica o local de ensino apropriado para tal prática, elaboramos o estudo de 20 casos tratados por médicos residentes em treinamento sob supervisão, a fim de observar a ...

  16. Impactos del ENSO en la biogeoquímica del sistema de afloramiento frente a Perú central, febrero 2013 - diciembre 2015

    OpenAIRE

    Graco, Michelle; Correa Chilon, David; García Díaz, Walter; Sarmiento, Miguel

    2016-01-01

    El ecosistema de afloramiento frente a Perú, tiene características que le confieren propiedades únicas y relevantes en el contexto regional y global. Entre sus propiedades biogeoquímicas se destaca la presencia de i) una alta productividad consecuencia de aguas ricas en nutrientes, ii) una extensa y somera Zona de Mínimo Oxígeno (ZMO) y iii) un alto reciclaje y pérdida de nitratos, asociado a los procesos de productividad como a la remineralización de la materia orgánica. Todas estas carac...

  17. Participación electoral femenina en la victoria del Frente Popular y su contribución a la protesta social en la primavera del 36

    OpenAIRE

    Seoane Amigo, Paloma

    2012-01-01

    Se pretende con el presente estudio poner el acento en lo denunciado, tantas veces, en la historiografía de género como «invisibilidad femenina», con el objetivo último de comprender la problemática socio-política a la que se ha visto subyugada la mujer durante el lapso de tiempo que transcurre desde el triunfo del Frente Popular hasta los comienzos de la Guerra Civil. Todo ello con la intención de contribuir intelectualmente al esfuerzo iniciado por otras colegas historiadoras en la materia,...

  18. Clandestineness and armed struggle: a look from the gender. the case of "Mery" in militancy clandestine Frente Patriótico Manuel Rodríguez

    Directory of Open Access Journals (Sweden)

    Javiera Libertad Robles Recabarren

    2013-06-01

    Full Text Available This paper focuses its concern on the participation of women in the struggle against the military dictatorship in Chile (1973 - 1988, with the aim of revealing my gender relations established within the clandestine militancy. To realize this, we turn to memoria suelta of a woman activist Frente Patriótico Manuel Rodríguez, who through the testimony of their experience exposes militant aspects of life from his position as woman, mother and clandestine, allowing unveil the place occupied by women in the armed wing of the Communist Party of Chile.

  19. Evaluación económica de la monoterapia con tocilizumab frente a adalimumab en artritis reumatoide

    Directory of Open Access Journals (Sweden)

    Federico Navarro Sarabia

    2013-01-01

    Full Text Available Fundamento: Tocilizumab (TCZ fue superior a adalimumab (ADA en monoterapia en la reducción de los signos y síntomas de la artritis reumatoide del adulto (AR en pacientes intolerantes o con respuesta inadecuada a metotrexato (MTX. El objetivo del estudio fue analizar el costeefectividad de TCZ vs ADA en estos pacientes. Métodos: Evaluación económica del coste por respuesta o remisión con TCZ vs ADAa partir del estudioADACTA(horizonte temporal: 24 semanas. Criterios de respuesta clínica ACR o de remisión de la enfermedad, índice DAS28. Ámbito: Sistema Nacional de Salud. Los costes incluidos (adquisición, administración y monitorización de los medicamentos en € de 2012 se obtuvieron de fuentes españolas. Se efectuaron análisis de sensibilidad simples univariantes. Resultados: Las tasas de respuestaACR20,ACR50 yACR70 con TCZ y ADA se obtuvieron en el 65% y 49,4% (p <0,01; 47,2% y 27,8% (p <0,01; y en el 32,5% y 17,9% (p <0,01 de los pacientes, respectivamente. La remisión DAS28 se produjo en el 39,9% y 10,5%, respectivamente (p <0,0001. El coste por respuesta fue menor con TCZ que con ADA (ACR20: 8.105 y 11.553 €; ACR50: 11.162 y 20.529 €; ACR70: 16.211 y 31.882 € respectivamente. El coste de la remisión DAS28 fue de 13.204 € y 54.352 € respectivamente. En todos los escenarios el tratamiento con TCZ tuvo mayor eficacia y menores costes que con ADA . Conclusiones: Según este análisis, en España la monoterapia con TCZ es una estrategia eficiente frente a ADA para el tratamiento de los pacientes con AR intolerantes o con respuesta inadecuada a MTX.

  20. Alkaline and carbonatite metasomatism of lithospheric mantle beneath SW Poland- Pilchowice case

    Science.gov (United States)

    Ćwiek, Mateusz; Matusiak-Małek, Magdalena; Puziewicz, Jacek; Ntaflos, Theodoros

    2014-05-01

    The Cenozoic basanites from Pilchowice (SW Poland) form volcanic plug located exactly at Intra- Sudetic Fault. These basanites belong to the Polish part of the Central European Volcanic Province and contain numerous, usually small (pfu and mg# from 0.915- 0.920 . One xenolith contains clinopyroxene with abundant spongy rims. Primary clinopyroxene is very rare and Al-enriched (mg# 0.92, 0.17 atoms of Al pfu). The spinel is Cr enriched (cr# 0.46-0.68) and is usually associated with clinopyroxene. Orthopyroxene is depleted in REE compared to primitive mantle. Orthopyroxene from majority of xenoliths are strongly LREE depleted ((La/Lu)N = 0.03-0.21). All studied peridotites contain clinopyroxene which is enriched (2 to 70 times) in REE compared to primitive mantle. Clinopyroxene patterns show relative low HREE concentration ((La/Lu)N = 4.75- 19.99), moreover patterns from three samples are convex- upward shaped with inflection point on Nd ((La/Nd)N = 0.36-0.96). Clinopyroxene- poor lithology, high cr# in spinel and LREE- depleted nature of orthopyroxene suggest that upper mantle sampled by Pilchowice basanite is a restite after partial melting. The LREE enriched composition of clinopyroxene suggest that peridotites were metasomatised. Clinopyroxene convex- upward shaped REE plots with inflection point on Nd is typical for metasomatism related with alkaline melt. On the other hand very low ratios of Ti/ Eu (24.8- 738.9) and high (La/ Yb)N (3.5- 17) ratio (Coltorti, 1999) suggest that the metasomatic agent was either a mixture of alkaline silicate melt with carbonatite or peridotite reaction with two independent agents is recorded. This study is a part of MSc thesis of the first author and was possible thanks to the project NCN 2011/03/B/ST10/06248 of Polish National Centre for Science. Coltorti, M., Bonadiman, C., Hinton, R. W., Siena, F. & Upton, B. G. J. (1999). Carbonatite metasomatism of the oceanic upper mantle: Evidence from clinopyroxenes and glasses in

  1. The reactivation of the SW Iberian passive margin: a brief review

    Science.gov (United States)

    Duarte, Joao; Rosas, Filipe; Terrinha, Pedro; Schellart, Wouter; Almeida, Pedro; Gutscher, Marc-André; Riel, Nicolas; Ribeiro, António

    2016-04-01

    On the morning of the 1st of November of 1755 a major earthquake struck offshore the Southwest Iberian margin. This was the strongest earthquake ever felt in Western Europe. The shake, fire and tsunami devastated Lisbon, was felt as far as Finland and had a profound impact on the thinkers of that time, in particular on the Enlightenment philosophers such as Voltaire, Rousseau and Kant. The Great Lisbon Earthquake is considered by many as the event that marks the birth of modern geosciences; and made of this region one of the most well studied areas in the world. After the 1755 earthquake, Kant and others authors wrote several treaties dealing with the causes and dynamics of earthquakes and tsunamis and were close to identify some key elements of what we now call plate tectonics. More than two hundred years later, in the year of 1969, the region was struck by another major earthquake. This was precisely during the period in which the theory of plate tectonics was being built. Geoscientists like Fukao (1973), Purdy (1975) and Mackenzie (1977) immediately focused their attention in the area. They suggested that these events were related with "transient" subduction of Africa below Iberia, along the East-West Azores-Gibraltar plate boundary. Several years later, Ribeiro (1989) suggested that instead of Africa being subducted below Iberia, it was the West Iberian passive margin that was being reactivated, a process that may, in time, lead to the formation of a new subduction zone. In the turning of the millennium, a subducting slab was imaged bellow the Gibraltar Straits, a remanent of the Western Mediterranean arc system that according to Gutscher et al. (2002) was related with ongoing subduction. Recently, it was proposed that a causal link between the Gibraltar subduction system and the reactivation of the SW Iberian margin might exist. In addition, the large-scale Africa-Eurasia convergence is inducing compressive stresses along the West Iberian margin. The margin

  2. Structural inheritance and coastal geomorphology in SW Brittany, France: An onshore/offshore integrated approach

    Science.gov (United States)

    Raimbault, Céline; Duperret, Anne; Le Gall, Bernard; Authemayou, Christine

    2018-04-01

    The Variscan crystalline basement exposed along the SW Brittany coast recorded extensive long-term planation processes during Mesozoic times. Detailed onshore-offshore mapping (600 km2) in the Penmarc'h-Concarneau granitic coastal area reveals a km-scale, deeply fractured submarine rocky shelf. High-resolution offshore imagery (bathymetry and seismic reflection dataset), combined to structural field investigations, on these surfaces allow us to identify a preserved network of both ductile and brittle structures. The inherited fault pattern is dominated by the N160°E-trending and long-lived Concarneau-Toulven fault zone (CTFS) that separates two distinct morphostructural blocks, and strongly influences the seaward limit of the Concarneau submarine rocky shelf, as well as the linear coastline of the Concarneau embayment. The structural imprint of the CTFS decreases progressively westwards with respect to a composite network of large-scale N50°E- and N140°E-oriented faults bounding the seaward edge of the Penmarc'h rocky shelf. The latter in turn splits into three large-scale blocks along N50°E- (La Torche Fault - LTF), N140°E- (Saint Guénolé Fault - SGF) and N160°E-trending normal faults. The morphostructural evolutionary model applied here to the Penmarc'h-Concarneau granitic coastal area resulted from the combined effects of structural Variscan inheritance and post-Variscan tectonics. Paleo-stress analysis of striated fault planes indicates three main Cenozoic tectonic events, inferred to have operated from Eocene to post-Oligocene times. The 3D-architecture of the Concarneau embayment, as a rocky shelf partially sealed with quaternary sediments, chiefly resulted from the reactivation of the CTFS during Eocene and Oligocene times. Further west, the surface of the Penmarc'h rocky shelf was tilted southeastward by the brittle reactivation of the LTF, and dissected by a horst-graben network post-Oligocene in age. The present-day morphology of the Penmarc'h and

  3. Lithofacies characteristics of diatreme deposits: Examples from a basaltic volcanic field of SW Sardinia (Italy)

    Science.gov (United States)

    Mundula, F.; Cioni, R.; Funedda, A.; Leone, F.

    2013-04-01

    A deeply eroded diatreme field, consisting in several, decametric-sized, vertical, mainly clastic volcanic bodies of basaltic composition is described for the first time in the Variscan basement of SW Sardinia. The recognition and description of four different lithofacies in these diatremes allowed discussion of the role of the different processes which control magma eruption and conduit infilling, and making general inferences about diatremes. The studied diatremes have a cross-sectional shape from elliptical to sub-triangular, and are slightly elongated nearly parallel to the main foliation of the intruded meta-sedimentary rocks. Foliation of host rocks is locally reoriented or folded close to the contact with the diatremes, suggesting that magma possibly rose to the surface through fissures oriented nearly parallel to host rock foliation. Textural features of the volcanic bodies show many analogies with kimberlitic diatremes, despite the difference in petrography and composition. Juvenile lapilli are mainly made by ghosts of mafic phenocrysts (olivine and clinopyroxene) set in a groundmass formed by plagioclase microlites immersed in a cryptocrystalline, chlorite-rich matrix. The four lithofacies were described mainly based on the shape and physical features of the clasts and textural anisotropy: a globular, juvenile-rich, lapilli tuff facies (GJLt); an angular, juvenile-rich, lapilli tuff facies (AJLt); a lithic-rich, lapilli tuff facies LiRLt), and a coherent, lava-like facies (COH). All the clastic lithofacies are generally well sorted and typically lack a fine-grained matrix. Juvenile fragments are lapilli sized and from equant to oblate in axial ratio, and from rounded-globular to very angular in shape. Conversely, lithic clasts are largely variable in shape and size, and are mainly represented by basement-derived clasts. The absence of bedding, the scarcity of the coherent facies and the dominance of clast supported, structureless, volcaniclastic facies

  4. Morphology and sediment dynamics of the Capbreton canyon (Bay of Biscay, SW France)

    Science.gov (United States)

    Gaudin, M.; Umr 5805; Ifremer Team

    2003-04-01

    The Canyon of Capbreton extending in the Bay of Biscay (SW France) is the deepest canyon in the world. Its structure and morphology was studied using new multibeam bathymetry, acoustic imagery and high-resolution seismic data. The canyon head appears only 250 m away from the coast line and runs westward parallel to the north coast of Spain for 160 km due to structural control, then turns northward, widens and abruptly disappears in the continental rise by 3500 m water depth. Its northern margin is flat and progrades clearly westward. Conversely the southern margin is steep and progrades towards the north (i.e. towards the canyon). Down to 800 m water depth, the canyon deeply incises the continental shelf and the axial channel is meandering (sinuosity of 1.9). The canyon shows both major and minor stream beds, perched tributary valleys, nested terraces and abandoned meanders. The terraces have three morphologies: (1) flat, (2) with a raised side or (3) with a horseshoe structure. These morphologies have been interpreted as overbank deposits or nested levees (1 and 2) or as the result of meander abandon (3). Terraces of types (1) and (2) contain mainly fine deposits resulting from decantation of the top of turbulent surges that flow in the canyon. Westward (800 to 2000 m water depth) the main talweg remains sinuous (1.7). On the southern margin, several straight or slightly sinuous S-N tributary valleys are followed by alignments of pockmarks that also indicate a structural control. On the northern margin, a single large tributary valley with a sinuous central talweg, flowing from the upper Aquitaine continental slope, is interpreted as a giant slump scar due to sediment instability. This valley is bordered to the west by a topographic high with sediment waves on the external flank that might be interpreted as a sedimentary levee. The canyon recorded a recent turbidite activity. An 18 cm-thick turbidite was deposited at 650 m water depth by a turbidity current

  5. Influence of wind turbines on seismic stations in the upper rhine graben, SW Germany

    Science.gov (United States)

    Zieger, Toni; Ritter, Joachim R. R.

    2018-01-01

    By analysing long- and short-term seismological measurements at wind farms close to the town of Landau, SW Germany, we present new insights into ground motion signals from wind turbines (WTs) at local seismic stations. Because of their need to be located in similar regions with sparsely anthropogenic activities, wind turbines impact seismic stations and their recordings in a way that is not yet fully understood by researchers. To ensure the undisturbed recording tasks of a regional seismic array or a single station by a protected area around those endangered stations, it is very important to investigate the behavior of WTs as a seismic source. For that reason, we calculate averaged one-hour long spectra of the power spectral density (PSD) before and after the installation of a new wind farm within the investigated area. These PSD are ordered according to the rotation speed. We observe a clear increase of the PSD level after the WT installation in a frequency range of 0.5 to 10 Hz up to a distance of 5.5 km away from the WT. By analysing seismic borehole data, we also observe a decrease of the PSD of wind dependent signals with depth. The impact of wind-dependent signals is found to be much more pronounced for the shallower station (150 m depth) than for the deeper one (305 m depth). Using short-term profile measurements, we fit a power-law decay proportional to 1/ r b to the main WT-induced PSD peaks and differentiate between near-field and far-field effects of ground motions. For low frequencies in the range from 1 to 4 Hz, we determine a b value of 0.78 to 0.85 for the far field, which is consistent with surface waves. The b value increases (up to 1.59) with increasing frequencies (up to 5.5 Hz), which is obviously due to attenuating effects like scattering or anelasticity. These results give a better understanding of the seismic wavefield interactions between wind turbines (or wind farms) with nearby seismic stations, including borehole installations, in a

  6. Development of soil quality along a chronosequence under natural succession in the Dragonja catchment, SW Slovenia

    Science.gov (United States)

    van Hall, Rutger; Cammeraat, Erik

    2015-04-01

    Agricultural fields have been increasingly abandoned in several regions in Southern Europe. In many cases this leads to natural vegetation succession which may have a direct impact on soil quality,biodiversity and hydrological connectivity. This research aims at getting insight on the effects of natural vegetation succession on the development of soil quality in the Sub-Mediterranean Dragonja catchment in SW Slovenia. This site was chosen due to its uniform geology, geomorphology and soil types. Four different stages of vegetation succession (i.e. field, abandoned field, young forest, semi-mature forest) were selected and sampled on both north-, and south-facing slopes, resulting in 8 treatments for which 6 representative sites were sampled. Samples were analysed on OC and TN content, EC, pH, bulk density, aggregate stability and grain size distribution. To get insight on the changes in biodiversity vegetation records were made distinguishing five different plant functional groups (i.e. juveniles, grasses, herbs, shrubs and trees). Age group (i.e. stage of vegetation succession) significantly influenced the OC and TN content, aggregate stability, bulk density and pH. Directly after abandonment, between age group 0 and 1, OC and TN content, aggregate stability and pH increased significantly and bulk density decreased significantly. OC content was most affected by age group and furthermore significantly correlated to TN content, aggregate stability, bulk density and pH. Regarding biodiversity, there was a significant increase in cover by trees between age group 1 and 2 and a significant decrease between age group 2 and 3. Cover by herbs decreased significantly between age group 1 and 2. The number of different trees and shrubs increased significantly between age group 0 and 1, and the number of different juveniles increased significantly between age group 2 and 3. Another factor significantly influencing the soil's quality is aspect. Although not found for each age

  7. Internal tides affect benthic community structure in an energetic submarine canyon off SW Taiwan

    Science.gov (United States)

    Liao, Jian-Xiang; Chen, Guan-Ming; Chiou, Ming-Da; Jan, Sen; Wei, Chih-Lin

    2017-07-01

    Submarine canyons are major conduits of terrestrial and shelf organic matter, potentially benefiting the seafloor communities in the food-deprived deep sea; however, strong bottom currents driven by internal tides and the potentially frequent turbidity currents triggered by storm surges, river flooding, and earthquakes may negatively impact the benthos. In this study, we investigated the upper Gaoping Submarine Canyon (GPSC), a high-sediment-yield canyon connected to a small mountain river (SMR) off southwest (SW) Taiwan. By contrasting the benthic meiofaunal and macrofaunal communities within and outside the GPSC, we examined how food supplies and disturbance influenced the benthic community assemblages. The benthic communities in the upper GPSC were mainly a nested subset of the adjacent slope assemblages. Several meiofaunal (e.g. ostracods) and macrofaunal taxa (e.g. peracarid crustaceans and mollusks) that typically occurred on the slope were lost from the canyon. The polychaete families switched from diverse feeding guilds on the slope to motile subsurface deposit feeders dominant in the canyon. The diminishing of epibenthic peracarids and proliferation of deep burrowing polychaetes in the GPSC resulted in macrofauna occurring largely within deeper sediment horizons in the canyon than on the slope. The densities and numbers of taxa were depressed with distinct and more variable composition in the canyon than on the adjacent slope. Both the densities and numbers of taxa were negatively influenced by internal tide flushing and positively influenced by food availability; however, the internal tides also negatively influenced the food supplies. While the meiofauna and macrofauna densities were both depressed by the extreme physical conditions in the GPSC, only the macrofaunal densities increased with depth in the canyon, presumably related to increased frequency and intensity of disturbance toward the canyon head. The population densities of meiofauna, on the

  8. HONGOS CAUSANTES DE ENFERMEDADES POSTCOSECHA EN CHAYOTE (Sechium edule (Jacq. SW. Y SU CONTROL IN VITRO

    Directory of Open Access Journals (Sweden)

    Siul D. Romero-Velazquez

    2015-01-01

    Full Text Available El fruto de chayote (Sechium edule (Jaqc. Sw. es una hortaliza de exportación de importancia para México y Costa Rica. El proceso comercial exige cumplir con estándares de calidad, que implican frutos sanos y libres de defectos. Sin embargo, debido a las condiciones de alta humedad que se desarrollan en los frutos empacados en películas plásticas, se han presentado rechazos en el mercado de exportación, por la presencia de enfermedades fungosas. El objetivo de este trabajo fue identificar morfológica (microscopía óptica y electrónica de barrido y molecularmente (PCR: Polimerase Chain Reaction las especies de hongos causales de las principales enfermedades postcosecha de chayote en frutos infectados procedentes de huertas comerciales para exportación, así como probar in vitro la efectividad de diversos productos comerciales en la inhibición del crecimiento de dichos hongos. Los resultados mostraron a Didymella bryoniae como el causante de “gomosis de las cucurbitáceas” y a Fusarium oxysporum y F. solani como causales de fusariosis o ahogamiento de guías; estos patógenos dañan la parte basal y media de frutos comerciales, además de Chaetomium globosum, un asociado al proceso infeccioso de Fusarium sp., como saprófito no patógeno. La inoculación con Bacillus subtilis presentó una inhibición efectiva (0,01 mg.l-1 i.a en las pruebas in vitro contra Didymella bryoniae, Fusarium oxysporum y F. solani; el fungicida más efectivo contra los 2 primeros fue Tebuconazole-trifloxystrobin, con una DL50 de 0,0116 y 0,0106 mg.l-1 respectivamente; no así contra F. solani, cuyo mayor control fue registrado con procloraz, con DL50 de 0,0042 mg.l-1. Estos resultados contribuyen al reconocimiento de las enfermedades fungosas más importantes en chayote y su perspectiva de control durante el manejo postcosecha de frutos para exportación.

  9. Modeling stem increment in individual Pinus occidentalis Sw. trees in La Sierra, Dominican Republic

    Energy Technology Data Exchange (ETDEWEB)

    Bueno, S.; Bevilacqua, E.

    2010-07-01

    One of the most common and important tree characteristics used in forest management decision-making is tree diameter-at-breast height (DBH). This paper presents results on an evaluation of two growth functions developed to model stem diameter increases in individual Pinus occidentalis Sw. trees in La Sierra, Dominican Republic. The first model was developed in order to predict future DBH (FDM) at different intervals of time and the other for predicting growth, that is, periodic annual diameter increment (PADIM). Each model employed two statistical techniques for fitting model parameters: stepwise ordinary least squares (OLS) regression, and mixed models. The two statistical approaches varied in how they accounted for the repeated measurements on individual trees over time, affecting standard error estimates and statistical inference of model parameters. Each approach was evaluated based on six goodness of- fit statistics, using both calibration and validation data sets. The objectives were 1) to determine the best model for predicting future tree DBH; 2) to determine the best model for predicting periodic annual diameter increment, both models using tree size, age, site index and different indices of competitive status; and 3) compare which of these two modeling approaches predicts better the future DBH. OLS provided a better fit for both of the growth functions, especially in regards to bias. Both models showed advantages and disadvantages when they were used to predict growth and future diameter. For the prediction of future diameter with FDM, accuracy of predictions were within one centimeter for a five-year projection interval. The PADIM presented negligible bias in estimating future diameter, although there was a small increase in bias as time of prediction increased. As expected, each model was the best in estimating the response variable it was developed for.. However, a closer examination of the distribution of errors showed a slight advantage of the FDM

  10. Licoricidin inhibits the growth of SW480 human colorectal adenocarcinoma cells in vitro and in vivo by inducing cycle arrest, apoptosis and autophagy

    Energy Technology Data Exchange (ETDEWEB)

    Ji, Shuai [State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, 38 Xueyuan Road, Beijing 100191 (China); Jiangsu Key Laboratory of New Drug Research and Clinical Pharmacy, School of Pharmacy, Xuzhou Medical University, 209 Tongshan Road, Xuzhou 221004 (China); Tang, Shunan; Li, Kai; Li, Ziwei; Liang, Wenfei; Qiao, Xue; Wang, Qi [State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, 38 Xueyuan Road, Beijing 100191 (China); Yu, Siwang, E-mail: swang_yu@bjmu.edu.cn [State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, 38 Xueyuan Road, Beijing 100191 (China); Ye, Min, E-mail: yemin@bjmu.edu.cn [State Key Laboratory of Natural and Biomimetic Drugs, School of Pharmaceutical Sciences, Peking University, 38 Xueyuan Road, Beijing 100191 (China)

    2017-07-01

    Licorice (Glycyrrhiza uralensis Fisch.) possesses significant anti-cancer activities, but the active ingredients and underlying mechanisms have not been revealed. By screening the cytotoxic activities of 122 licorice compounds against SW480 human colorectal adenocarcinoma cells, we found that licoricidin (LCD) inhibited SW480 cell viability with an IC{sub 50} value of 7.2 μM. Further studies indicated that LCD significantly induced G1/S cell cycle arrest and apoptosis in SW480 cells, accompanied by inhibition of cyclins/CDK1 expression and activation of caspase-dependent pro-apoptotic signaling. Meanwhile, LCD promoted autophagy in SW480 cells, and activated AMPK signaling and inhibited Akt/mTOR pathway. Overexpression of a dominant-negative AMPKα2 abolished LCD-induced inhibition of Akt/mTOR, autophagic and pro-apoptotic signaling pathways, and significantly reversed loss of cell viability, suggesting activation of AMPK is essential for the anti-cancer activity of LCD. In vivo anti-tumor experiments indicated that LCD (20 mg/kg, i.p.) significantly inhibited the growth of SW480 xenografts in nude mice with an inhibitory rate of 43.5%. In addition, we obtained the glycosylated product LCDG by microbial transformation, and found that glycosylation slightly enhanced the in vivo anti-cancer activities of LCD. This study indicates that LCD could inhibit SW480 cells by inducing cycle arrest, apoptosis and autophagy, and is a potential chemopreventive or chemotherapeutic agent against colorectal cancer. - Highlights: • Molecular mechanisms for cytotoxic activity of licoricidin (LCD) were investigated. • LCD promoted autophagy of SW480 cells through AMPK and Akt/mTOR signaling pathways. • Both LCD and its glucoside showed in vivo anti-colorectal cancer activities.

  11. Measuring stigma affecting sex workers (SW) and men who have sex with men (MSM): A systematic review

    Science.gov (United States)

    Fitzgerald-Husek, Alanna; Van Wert, Michael J.; Ewing, Whitney F.; Holland, Claire E.; Katterl, Rachel; Rosman, Lori; Baral, Stefan D.

    2017-01-01

    Background Stigma involves discrediting a person or group based on a perceived attribute, behaviour or reputation associated with them. Sex workers (SW) and men who have sex with men (MSM) are key populations who are often at increased risk for the acquisition and transmission of HIV and who are affected by stigma that can negatively impact their health and well-being. Although stigma was included as an indicator in the US National HIV/AIDS Strategic Plan and there have been consultations focused on adding a stigma indicator within PEPFAR and the Global Fund in relation to potentiating HIV risks among key populations, there remains limited consensus on the appropriate measurement of SW- or MSM-associated stigma. Consequently, this systematic review summarizes studies using quantitative, qualitative, or mixed methods approaches to measure stigma affecting sex workers and men who have sex with men. Methods and findings This systematic review included English, French, and Spanish peer-reviewed research of any study design measuring SW- or MSM-associated stigma. Articles were published from January 1, 2004 to March 26, 2014 in PsycINFO, PubMed, EMBASE, CINAHL Plus, Global Health, and World Health Organization Global Health Library Regional Indexes. Of the 541 articles reviewed, the majority measured stigma toward MSM (over 97%), were conducted in North America, used quantitative methods, and focused on internalized stigma. Conclusions With the inclusion of addressing stigma in several domestic and international HIV strategies, there is a need to ensure the use of validated metrics for stigma. The field to date has completed limited measurement of stigma affecting sex workers, and limited measurement of stigma affecting MSM outside of higher income settings. Moving forward requires a concerted effort integrating validated metrics of stigma into health-related surveys and programs for key populations. PMID:29190642

  12. Hsa-miR-11181 regulates Wnt signaling pathway through targeting of APC2 transcripts in SW480 cell line.

    Science.gov (United States)

    Dokanehiifard, Sadat; Soltani, Bahram M

    2018-01-30

    Wnt signaling plays important roles in differentiation, morphogenesis and development. This signaling pathway is highly regulated at all levels and microRNAs are small noncoding RNAs regulating Wnt signaling. Here, we intended to investigate hsa-miR-11181 (a novel miRNA located in TrkC gene) effect on Wnt signaling pathway in SW480 cell line. TOP/FOP flash assay indicated up-regulation of Wnt signaling, following the overexpression of hsa-miR-11181, verified through RT-qPCR. Bioinformatics analysis predicted APC1, APC2 and Axin1 might be targeted by hsa-miR-11181. Then, RT-qPCR analysis indicated that APC2 and Axin1 have been significantly down-regulated following the hsa-miR-11181 overexpression. However dual luciferase assay analysis supported only APC2 3'-UTR is directly targeted by this miRNA. Then, treatment of SW480 cells with Wnt-inhibitory small molecules supported the effect of hsa-miR-11181 at the inhibitory complex level containing APC2 protein. Consistently, viability of SW480 cells overexpressing hsa-miR-11181 was significantly elevated, measured through MTT assay. Overall, these results suggest that hsa-miR-11181 may play a crucial role in Wnt signaling regulation and confirmed that APC2 3'-UTR is targeted by hsa-miR-11181 and propose the presence of its recognition sites in the promoter or coding regions of Axin1 gene. Copyright © 2017. Published by Elsevier B.V.

  13. Measuring stigma affecting sex workers (SW and men who have sex with men (MSM: A systematic review.

    Directory of Open Access Journals (Sweden)

    Alanna Fitzgerald-Husek

    Full Text Available Stigma involves discrediting a person or group based on a perceived attribute, behaviour or reputation associated with them. Sex workers (SW and men who have sex with men (MSM are key populations who are often at increased risk for the acquisition and transmission of HIV and who are affected by stigma that can negatively impact their health and well-being. Although stigma was included as an indicator in the US National HIV/AIDS Strategic Plan and there have been consultations focused on adding a stigma indicator within PEPFAR and the Global Fund in relation to potentiating HIV risks among key populations, there remains limited consensus on the appropriate measurement of SW- or MSM-associated stigma. Consequently, this systematic review summarizes studies using quantitative, qualitative, or mixed methods approaches to measure stigma affecting sex workers and men who have sex with men.This systematic review included English, French, and Spanish peer-reviewed research of any study design measuring SW- or MSM-associated stigma. Articles were published from January 1, 2004 to March 26, 2014 in PsycINFO, PubMed, EMBASE, CINAHL Plus, Global Health, and World Health Organization Global Health Library Regional Indexes. Of the 541 articles reviewed, the majority measured stigma toward MSM (over 97%, were conducted in North America, used quantitative methods, and focused on internalized stigma.With the inclusion of addressing stigma in several domestic and international HIV strategies, there is a need to ensure the use of validated metrics for stigma. The field to date has completed limited measurement of stigma affecting sex workers, and limited measurement of stigma affecting MSM outside of higher income settings. Moving forward requires a concerted effort integrating validated metrics of stigma into health-related surveys and programs for key populations.

  14. Green synthesis of selenium nanoparticles using Acinetobacter sp. SW30: optimization, characterization and its anticancer activity in breast cancer cells

    Directory of Open Access Journals (Sweden)

    Wadhwani SA

    2017-09-01

    Full Text Available Sweety A Wadhwani,1 Mahadeo Gorain,2 Pinaki Banerjee,2 Utkarsha U Shedbalkar,3 Richa Singh,1 Gopal C Kundu,2 Balu A Chopade1,4 1Department of Microbiology, Savitribai Phule Pune University, 2Laboratory of Tumor Biology, Angiogenesis and Nanomedicine Research, National Center for Cell Science, Savitribai Phule Pune University Campus, Pune, 3Department of Biochemistry, The Institute of Science, Mumbai, 4Dr Babasaheb Ambedkar Marathwada University, Aurangabad, Maharashtra, India Abstract: The aim of this study was to synthesize selenium nanoparticles (SeNPs using cell suspension and total cell protein of Acinetobacter sp. SW30 and optimize its synthesis by studying the influence of physiological and physicochemical parameters. Also, we aimed to compare its anticancer activity with that of chemically synthesized SeNPs in breast cancer cells. Cell suspension of Acinetobacter sp. SW30 was exposed to various physiological and physicochemical conditions in the presence of sodium selenite to study their effects on the synthesis and morphology of SeNPs. Breast cancer cells (4T1, MCF-7 and noncancer cells (NIH/3T3, HEK293 were exposed to different concentrations of SeNPs. The 18 h grown culture with 2.7×109 cfu/mL could synthesize amorphous nanospheres of size 78 nm at 1.5 mM and crystalline nanorods at above 2.0 mM Na2SeO3 concentration. Polygonal-shaped SeNPs of average size 79 nm were obtained in the supernatant of 4 mg/mL of total cell protein of Acinetobacter sp. SW30. Chemical SeNPs showed more anticancer activity than SeNPs synthesized by Acinetobacter sp. SW30 (BSeNPs, but they were found to be toxic to noncancer cells also. However, BSeNPs were selective against breast cancer cells than chemical ones. Results suggest that BSeNPs are a good choice of selection as anticancer agents. Keywords: comparison, selective, 4T1, MCF7

  15. Distributions and seasonal abundances of krill eggs and larvae in the sub-Arctic Godthåbsfjord, SW Greenland

    DEFF Research Database (Denmark)

    Teglhus, Frederik Wolff; Agersted, Mette Dalgaard; Akther, Hasna

    2015-01-01

    The larval krill community (Thysanoessa spp.) was investigated along the sub-Arctic Godthåbsfjord, SW Greenland, in June 2010. In addition, the progress of krill development from egg to furcilia was studied from March to August 2010 in a fjord branching off the Godthåbsfjord. Krill spawned from...... and furcilia stages lasted 22 and 63 d, respectively. The growth rate from metanauplius to calyptopis was 0.12 d−1, while the growth rate across all developmental stages was 0.05 d−1. Mortality rates were calculated as 25% from eggs to nauplii, 48% from eggs to calyptopes and 83% from eggs to furcilia. During...

  16. Variations of soil radon and thoron concentrations in a fault zone and prospective earthquakes in SW Taiwan

    International Nuclear Information System (INIS)

    Yang, T.F.; Walia, V.; Chyi, L.L.; Fu, C.C.; Chen, C.-H.; Liu, T.K.; Song, S.R.; Lee, C.Y.; Lee, M.

    2005-01-01

    An automatic station for soil gas monitoring was set up on an active fault zone of SW Taiwan. After more than one year of continuous measurements, some spike-like anomalous high radon and thoron concentrations could be observed. A similar soil radon spectrum was also obtained from an independent monitoring station, which was only 100m away. These anomalous peaks usually occurred a few days or weeks before the earthquakes (M L >=4.5). This indicates that variations of both soil radon and thoron can serve as useful tools for earthquake surveillance, esp. at fault zones

  17. Checklist of recent brachiopod species collected during the Terrasses and Exbodi cruises in the New Caledonian region, SW Pacific

    Science.gov (United States)

    Bitner, Maria Aleksandra

    2015-01-01

    Abstract Twenty species belonging to 16 genera, i.e. Neoancistrocrania, Novocrania, Basiliola, Basiliolella, Ebiscothyris, Stenosarina, Kanakythyris, Xenobrochus, Terebratulina, Eucalathis, Fallax, Frenulina, Septicollarina, Campages, Annuloplatidia, and Thecidellina have been identified in the material collected during the Terrasses and Exbodi cruises in the New Caledonian region, SW Pacific. The species Basiliolella grayi (Woodward, 1855) and Fallax neocaledonensis Laurin, 1997 are the most common in the studied collection, while Eucalathis murrayi (Davidson, 1878) is reported for the first time from the New Caledonian region. PMID:26798235

  18. Atitudes de enfermeiros de hospital geral frente ao uso do álcool e alcoolismo Actitudes de enfermeros de hospital general frente al uso de alcohol y al alcoholismo Clinical nurses' attitudes toward the use of alcohol and alcoholism

    Directory of Open Access Journals (Sweden)

    Divane Vargas

    2006-02-01

    Full Text Available Estudo psicométrico, utilizando a escala Seaman Mannello Nurse's attitudes toward alcohol and alcoholism, aplicou o instrumento a uma população de 196 enfermeiros de um macro-hospital, visando a mensurar as atitudes de enfermeiros de hospital geral no que se refere ao álcool e ao beber. Os dados apontaram que os enfermeiros consideram que as bebidas alcoólicas são prejudiciais (54,4%, beber com moderação não é inofensivo(57,1% e é errado (47,4%. Revelam dificuldade na aceitação do beber como um direito da pessoa, considerando as bebidas alcoólicas capazes de tornar pessoas saudáveis "débeis e loucas" (29,8%. O enfermeiro é um profissional indispensável para o tratamento e recuperação do alcoolista, suas atitudes podem influenciar no relacionamento com o paciente e conseqüentemente favorecer o tratamento.En este estudio psicométrico fue utilizada la escala Seaman Mannello Nurse's attitudes toward alcohol and alcoholism y aplicado un instrumento a una población de 196 enfermeros de un macro-hospital, con el objetivo de mensurar las actitudes de enfermeros de hospital general frente al alcohol y beber. Los datos mostraron que los enfermeros consideran que las bebidas alcohólicas son perjudiciales (54,4%, beber con moderación no es inofensivo (57,1% y es errado (47,4%, revelando dificultad en la aceptación del beber como un derecho de la persona. 29,8% consideraron las bebidas alcohólicas capaces de tornar las personas saludables en "locas y débiles". El enfermero es un profesional fundamental para el tratamiento y recuperación del alcoholista. Sus actitudes pueden influenciar el relacionamiento con el paciente y, así, favorecer el tratamiento.This psychometric study used the Seaman Mannello's scale of "nurse's attitudes toward alcohol and alcoholism". Authors applied an instrument to a population of 196 nurses from a general hospital with the aim to measure nurses'attitudes toward alcohol and drinking. Data showed that

  19. El Frente Negro y el Movimiento Alemania Libre en la Argentina durante las décadas de 1930 y 1940

    Directory of Open Access Journals (Sweden)

    Germán Friedmann

    Full Text Available Este artículo analiza la constitución, la organización y las acciones emprendidas por el Schwarze Front (Frente Negro y del Frei-Deutschland Bewegung (Movimiento Alemania Libre en la Argentina durante las décadas de 1930 y 1940. Lideradas desde el exilio por Otto Strasser, ambas agrupaciones se opusieron al Tercer Reich. Strasser, uno de los principales organizadores del partido nacionalsocialista alemán debió abandonar su país en 1933 debido a un fuerte enfrentamiento con Hitler, al que acusaba de traicionar los ideales del nacionalsocialismo. El trabajo se centra en las redes establecidas entre los integrantes del Frente Negro y el Movimiento Alemania Libre con otros países de América; en el papel que tuvieron en las denuncias de la "infiltración nazi" en el Cono Sur, y en las relaciones que entablaron con los germanoparlantes antinazis de la Argentina.

  20. Relación del y el rendimiento académico con la satisfacción frente a los estudios en estudiantes universitarios

    Directory of Open Access Journals (Sweden)

    Carmen Cecilia Caballero D.

    2007-06-01

    Full Text Available Los estudiantes se enfrentan cada vez más a retos y exigencias del medio que demandan una gran cantidad de recursos físicos y psicológicos de diversa índole. Muchos de ellos dejan sus estudios o disminuyen de manera considerable su rendimiento académico sin encontrar una explicación. Dos variables que han sido poco estudiadas en nuestro contexto y que pueden dar claridad a buena parte de esta situación son el burnout y la satisfacción. En esta investigación se estableció la relación del burnout, el rendimiento académico, con la satisfacción frente a los estudios en una muestra de 202 universitarios de la jornada nocturna de una universidad privada de Barranquilla, quienes respondieron el MBI-SS (Schaufeli, Martínez, Marques Pinto, Salanova, & Bakker, 2002. Los resultados indican correlaciones negativas entre agotamiento, cinismo, autoeficacia y rendimiento académico con la satisfacción frente al estudio, mientras que el vigor, dedicación y absorción se correlacionaron positivamente con esta. Por otro lado, el buen funcionamiento académico se correlaciona positivamente con las dimensiones del engagement y negativamente con el cinismo; de manera particular, ninguna de las variables se correlaciona con el agotamiento, a pesar de evidenciar cinismo y baja autoeficacia.

  1. Relación del burnout y el rendimiento académico con la satisfacción frente a los estudios en estudiantes universitarios

    Directory of Open Access Journals (Sweden)

    Carmen Cecilia Caballero D.

    2010-07-01

    Full Text Available Los estudiantes se enfrentan cada vez más a retos y exigencias del medio que demandan una gran cantidad de recursos físicos y psicológicos de diversa índole. Muchos de ellos dejan sus estudios o disminuyen de manera considerable su rendimiento académico sin encontrar una explicación. Dos variables que han sido poco estudiadas en nuestro contexto y que pueden dar claridad a buena parte de esta situación son el burnout y la satisfacción. En esta investigación se estableció la relación del burnout, el rendimiento académico, con la satisfacción frente a los estudios en una muestra de 202 universitarios de la jornada nocturna de una universidad privada de Barranquilla, quienes respondieron el MBI-SS (Schaufeli, Martínez, Marques Pinto, Salanova, & Bakker, 2002. Los resultados indican correlaciones negativas entre agotamiento, cinismo, autoeficacia y rendimiento académico con la satisfacción frente al estudio, mientras que el vigor, dedicación y absorción se correlacionaron positivamente con esta. Por otro lado, el buen funcionamiento académico se correlaciona positivamente con las dimensiones del engagement y negativamente con el cinismo; de manera particular, ninguna de las variables se correlaciona con el agotamiento, a pesar de evidenciar cinismo y baja autoeficacia.

  2. Tamarugite in the Steam-Condensate Alteration Paragenesis in Diana Cave (SW Romania)

    Science.gov (United States)

    Puscas, C. M.; Onac, B. P.; Effenberger, H. S.; Povară, I.

    2012-12-01

    The double-salt hydrate tamarugite [NaAl(SO4)2 6H2O] is an uncommon mineral in the cave environment, forming as a result of chemical reactions between water and bedrock only under very specific conditions. The Diana Cave hosts a unique tamarugite occurrence, the first one to be reported from a typical karst environment. The cave is located within the limits of Băile Herculane township in the Cerna Mountains, SW Romania. It consists of a 14 m long, westward-oriented single passage, developed along the Diana Fault. In 1974 a concrete-clad mine gallery was created to channel the thermal water (Diana 1+2 Spring) flowing through the cave to a pumping station. The spring's chemical and physical parameters fluctuated through time, averaging 51.98° C, discharge of 0.96 Ls-1, pH of 7.46, 5768.66 ppm TDS, 9303 μScm-1 conductivity, 5.02 salinity. The major chemical components of the thermo-mineral water in Diana Cave are, Na+ (1392.57 ppm), K+ (58.55 ppm), Ca2+ (725.16 ppm), Mg2+ (10.78 ppm), Cl- (3376.83 ppm), and SO42- (92.27 ppm), and H2S (24.05 ppm), with traces of Si, Fe2+, Br+, I-, and Li+. The general air circulation pattern within the cave is fairly simple: cold air from the outside sweeps into the cave along the floor, heats up at the contact with the thermo-mineral water, ascends, and exists the cave along the ceiling. At the contact with the cold walls of the Diana Cave, the hot steam condenses and gives rise to a rich and exotic sulfate-mineral paragenesis (including halotrichite-series minerals, gypsum, bassanite, anhydrite, epsomite, alunite, halite, native sulfur, etc.). The most exotic minerals precipitate at or below the contact between the Tithonic - Neocomian limestone and the overlaying Cretaceous shaly limestone, as a result of steam-condensate alteration. Minerogenetic mechanisms responsible for the peculiar sulfate mineral assemblage in Diana Cave are evaporation, oxidation, hydrolysis, double exchange reactions, and deposition from vapours or

  3. Gravity Field Interpretation for Major Fault Depth Detection in a Region Located SW- Qa’im / Iraq

    Directory of Open Access Journals (Sweden)

    Wadhah Mahmood Shakir Al-Khafaji

    2017-09-01

    Full Text Available This research deals with the qualitative and quantitative interpretation of Bouguer gravity anomaly data for a region located to the SW of Qa’im City within Anbar province by using 2D- mapping methods. The gravity residual field obtained graphically by subtracting the Regional Gravity values from the values of the total Bouguer anomaly. The residual gravity field processed in order to reduce noise by applying the gradient operator and 1st directional derivatives filtering. This was helpful in assigning the locations of sudden variation in Gravity values. Such variations may be produced by subsurface faults, fractures, cavities or subsurface facies lateral variations limits. A major fault was predicted to extend with the direction NE-SW. This fault is mentioned by previous studies as undefined subsurface fault depth within the sedimentary cover rocks. The results of this research that were obtained by gravity quantitative interpretation find that the depth to this major fault plane center is about 2.4 Km.

  4. Influence of salinity on prevalence of the parasite Loxothylacus panopaei in the xanthid Panopeus obesus in SW Florida.

    Science.gov (United States)

    Tolley, S Gregory; Winstead, James T; Haynes, Lesli; Volety, Aswani K

    2006-06-23

    This study was conducted to examine the potential influence of salinity, a proxy for freshwater inflow, on the prevalence of the castrator parasite Loxothylacus panopaei on saltmarsh mud crabs Panopeus obesus on SW Florida oyster reefs. Spatial and seasonal patterns of the presence of potential host crabs and the prevalence of the parasite were assessed in the Caloosahatchee, Estero, and Faka Union estuaries. Lift nets (1 m2) containing 5 1 of oyster clusters were deployed on intertidal reefs at 3 sites along the salinity gradient of each estuary. Nets were deployed during 3 seasonally dry and 3 seasonally wet months for a period of 30 d. P. obesus densities tended to increase downstream in higher salinity waters, with crabs being absent from the upper station in the Caloosahatchee during both seasons and absent from the upper station of the Faka Union during wet months. Parasite prevalence was reduced upstream in each estuary during wet months compared to dry months, and for those estuaries that experienced higher relative levels of freshwater inflow. Furthermore, parasite prevalence was positively correlated with the mean salinity of capture of host crabs. Based on the distribution of P. obesus and the above patterns related to salinity, it appears that freshwater inflow and seasonal rains might regulate the prevalence of this parasite in SW Florida by creating spatiotemporal, low salinity refuges for its host.

  5. Effect of 60Co γ-rays irradiation on plant regeneration from callus of sea dallisgrass (paspalum vaginatum Sw.)

    International Nuclear Information System (INIS)

    Ye Xiaoqing; She Jianming; Wang Songfeng; Zhang Xu; Liang Liufang; Dong Mingqiang; Wu Yingying

    2010-01-01

    The pellet embryonic calli of Paspalum vagiantum Sw. cv. Adalay were used for 60 Co γ-rays irradiation. In the callus subculture medium with 2, 4-D 2.0 mg /L and BAP 0.05 mg /L, calli were irradiated at the dose rate 1 Gy /min of 60 Co γ-rays. Results showed that the rate of shoot regeneration was from 94% to 85% when calli irradiated with 20 ∼ 50 Gy; the rate of shoot regeneration was from 76% to 30%, and the rate of plant regeneration was from 44.5% to 8.7% between 60 ∼ 80 Gy. By 60 Gy of 60 Co γ-rays irradiation, the rate of shoot regeneration was about 76% in the differentiation medium with BAP 2.0 mg /L, and the relative rate of plant regeneration was 44.5% in the rooting medium with NAA 0.5 mg /L. The result of sequence-related amplified polymorphism (SRAP) markers analysis showed that the specific SRAP markers were associated with the somatic mutants. The mutation technique of 60 Co γ-rays has been established in the somatic cell of Paspalum vaginatum Sw. (authors)

  6. Induction of apoptosis by tomato using space mutation breeding in human colon cancer SW480 and HT-29 cells.

    Science.gov (United States)

    Shi, Jiahui; Yang, Bin; Feng, Pan; Li, Duo; Zhu, Jiajin

    2010-03-15

    As far as we know, there have been no reports concerning the functional characteristics of tomatoes using space mutation breeding. The aim of this study was to evaluate the anti-colon cancer effect of tomatoes M1 and M2 using space mutation breeding. In the present study, obvious anti-cancer activity was shown with tomato juice of M1 and M2 and their parent CK treatment in colon cancer cell lines SW480 and HT-29 in cell growth inhibition. In addition, SW480 cells were more sensitive to M1 and M2 than HT-29 cells in cell apoptosis. Furthermore, M1 and M2 induced cell cycle arrest both in G0-G1 and G2/M phases. These data suggest that consumption of tomato using space mutation breeding may provide benefits to inhibit growth of colon cancer cells. Therefore, tomato production using space mutation breeding may be a good candidate for development as a dietary supplement in drug therapy for colon cancer.

  7. The significance of fructose and MSG in affecting lipid and docosahexaenoic acid (DHA) production of Aurantiochytrium sp. SW1

    Science.gov (United States)

    Rahman, Shariffah Nurhidayah Syed Abdul; Kalil, Mohd Sahaid; Hamid, Aidil Abdul

    2018-04-01

    Optimization of fermentation medium for the production of docosahexaenoic acid (DHA) by Aurantiochytrium sp. SW1 was carried out. In this study, levels of fructose, monosodium glutamate (MSG) and sea salt were optimized for enhanced lipid and DHA production using response surface methodology (RSM). The design contains a total of 20 runs with 6 central points replication. Cultivation was carried out in 500 mL flasks containing 100 mL nitrogen limited medium at 30°C for 96h. Sequential model sum of squares (SS) revealed that the system was adequately represented by a quadratic model (p<0.0001). ANOVA results showed that fructose and MSG as a single factor has significant positive effect on the DHA content of SW1. The estimated optimal levels of the factors were 100 g/L fructose, 8 g/L MSG and 47% sea salt. Subsequent cultivation employing the suggested values confirmed that the predicted response values were experimentally achievable and reproducible, where 8.82 g/L DHA (51.34% g/g lipid) was achieved.

  8. Determination of c{sub sw} in N{sub f}=3+1 lattice QCD with massive Wilson fermions

    Energy Technology Data Exchange (ETDEWEB)

    Stollenwerk, Felix

    2017-02-07

    In order to obtain sensible results from Lattice QCD that may be compared with experiment, extrapolation to the continuum is crucial. The well-established Symanzik improvement program systematically reduces the order of cutoff effects, allowing for better control of the aforementioned errors, as well as larger and thus more affordable lattice spacings. Applied to the Wilson fermion action, it entails the addition of the Sheikholeslami-Wohlert term with the O(a) improvement coefficient c{sub sw}. In this work, a strategy is developed for the non-perturbative determination of c{sub sw} in the theory with N{sub f}=3+1 massive sea quarks. It is embedded in a general, mass-dependent renormalization and improvement scheme, for which we lay the foundations. The improvement condition, formulated by means of the PCAC relation in the Schroedinger Functional, is imposed along a line of constant physics that is designed to be close to the physical mass of the charm quark. The aim of this rather elaborate approach is to avoid large, mass-dependent O(a{sup 2}) effects in future large volume simulations with four dynamical quark species. The numerical results are worked out using the tree-level improved Luescher-Weisz gauge action. Since the gradient flow coupling is employed in the definition of the line of constant physics, its interdependence with the topological charge in regard to critical slowing down and topology freezing is investigated in a supplemental study.

  9. Submillimeter and far infrared line observations of M17 SW: A clumpy molecular cloud penetrated by UV radiation

    Science.gov (United States)

    Stutzki, J.; Stacey, G. J.; Genzel, R.; Harris, A. I.; Jaffe, d. T.; Lugten, J. B.

    1987-01-01

    Millimeter, submillimeter, and far infrared spectroscopic observations of the M17 SW star formation region are discussed. The results require the molecular cloud near the interface to be clumpy or filamentary. As a consequence, far ultraviolet radiation from the central OB stellar cluster can penetrate into the dense molecular cloud to a depth of several pc, thus creating bright and extended (CII) emission from the photodissociated surfaces of dense atomic and molecular clumps or sheets. The extended (CII) emission throughout the molecular cloud SW of the M17 complex has a level 20 times higher than expected from a single molecular cloud interface exposed to an ultraviolet radiation field typical of the solar neighborhood. This suggests that the molecular cloud as a whole is penetrated by ultraviolet radiation and has a clumpy or filamentary structure. The number of B stars expected to be embedded in the M17 molecular cloud probably can provide the UV radiation necessary for the extended (CII) emission. Alternatively, the UV radiation could be external, if the interstellar radiation in the vicinity of M17 is higher than in the solar neighborhood.

  10. Impact of sea-level rise on earthquake and landslide triggering offshore the Alentejo margin (SW Iberia)

    Science.gov (United States)

    Neves, M. C.; Roque, C.; Luttrell, K. M.; Vázquez, J. T.; Alonso, B.

    2016-12-01

    Earthquakes and submarine landslides are recurrent and widespread manifestations of fault activity offshore SW Iberia. The present work tests the effects of sea-level rise on offshore fault systems using Coulomb stress change calculations across the Alentejo margin. Large-scale faults capable of generating large earthquakes and tsunamis in the region, especially NE-SW trending thrusts and WNW-ESE trending dextral strike-slip faults imaged at basement depths, are either blocked or unaffected by flexural effects related to sea-level changes. Large-magnitude earthquakes occurring along these structures may, therefore, be less frequent during periods of sea-level rise. In contrast, sea-level rise promotes shallow fault ruptures within the sedimentary sequence along the continental slope and upper rise within distances of failures may either increase (if triggered by shallow fault ruptures) or decrease (if triggered by deep fault ruptures) as a result of sea-level rise. Moreover, observations of slope failures affecting the area of the Sines contourite drift highlight the role of sediment properties as preconditioning factors in this region.

  11. "Hacemos lo que podemos": los prestadores de servicios frente al problema de la utilización

    Directory of Open Access Journals (Sweden)

    BRONFMAN MARIO

    1997-01-01

    medicamentos. En la tercera parte se presenta un análisis de las principales convergencias y divergencias que se dan entre usuarios y prestadores de servicios. Se propone que algunas de las divergencias identificadas pueden estar en la base de la subutilización de los servicios de salud informada en diversos ámbitos. El trabajo concluye con una serie de recomendaciones, que derivan del análisis presentado, orientadas a mejorar la respuesta institucional frente a las necesidades de salud de los individuos.

  12. Geological mapping of investigation trench OL-TK19 at the Olkiluoto study site, Eurajoki, SW Finland

    Energy Technology Data Exchange (ETDEWEB)

    Eroma, E.; Nordbaeck, N.; Engstroem, J. [Geological Survey of Finland, Espoo (Finland)

    2014-12-15

    In October 2012, the geological mapping of investigation trench OL-TK19 was carried out by the Geological Survey of Finland at the Olkiluoto study site. The SE-NW trending, ca. 85 m long trench is located in the central part of the Olkiluoto Island next to investigation trenches OL-TK18 and OL-TK4. The lithology in investigation trench OL-TK19 is of heterogeneous character, with rock type varying from veined gneiss, diatexitic gneiss to pegmatitic granite, along with portions of mica gneiss and K-feldspar porphyritic gneiss. In addition, inclusions of mica gneiss, quartz gneiss and skarn are encountered. The rocks have been subjected to a multiphase ductile deformation and the trench is situated in an area where the latest ductile deformation phase, D4 prevails. The investigation trench can be divided into three domains according to its dominant deformation phase and foliation; the eastern part of the trench is dominated by the D3 deformation phase whereas the middle and western parts are dominated by the D4 deformation phase. The S3 foliation has a more ENE-WSW oriented direction whereas the S4 is trending NE-SW. In addition to this difference in orientation, the different structural signature of these two deformation types is observed, the S3 foliation is defined by smaller scaled granitic leucosome veining whereas the S4 foliation is intensely sheared and have a schistose character. During the fracture mapping, all fractures intersecting the central thread were investigated and a total of 132 fractures were recorded. The average fracture frequency 1.53 fractures/m. On the basis of fracture orientations, three fracture sets can be defined. The first set is vertical and NW-SE trending, second set strikes NE-SW with a moderate dip towards the SE and the third set is vertical and NE-SW trending. The median fracture length is 1.38 m and most fractures do not exceed 0.5 m in length, the longest measured fracture being 5.30 m in length. Fracture fillings are mostly

  13. Capillary pressure and saturation relations for supercritical CO2 and brine in sand: High-pressure Pc(Sw) controller/meter measurements and capillary scaling predictions

    Science.gov (United States)

    Tokunaga, Tetsu K.; Wan, Jiamin; Jung, Jong-Won; Kim, Tae Wook; Kim, Yongman; Dong, Wenming

    2013-08-01

    In geologic carbon sequestration, reliable predictions of CO2 storage require understanding the capillary behavior of supercritical (sc) CO2. Given the limited availability of measurements of the capillary pressure (Pc) dependence on water saturation (Sw) with scCO2 as the displacing fluid, simulations of CO2 sequestration commonly rely on modifying more familiar air/H2O and oil/H2O Pc(Sw) relations, adjusted to account for differences in interfacial tensions. In order to test such capillary scaling-based predictions, we developed a high-pressure Pc(Sw) controller/meter, allowing accurate Pc and Sw measurements. Drainage and imbibition processes were measured on quartz sand with scCO2-brine at pressures of 8.5 and 12.0 MPa (45°C), and air-brine at 21°C and 0.1 MPa. Drainage and rewetting at intermediate Sw levels shifted to Pc values that were from 30% to 90% lower than predicted based on interfacial tension changes. Augmenting interfacial tension-based predictions with differences in independently measured contact angles from different sources led to more similar scaled Pc(Sw) relations but still did not converge onto universal drainage and imbibition curves. Equilibrium capillary trapping of the nonwetting phases was determined for Pc = 0 during rewetting. The capillary-trapped volumes for scCO2 were significantly greater than for air. Given that the experiments were all conducted on a system with well-defined pore geometry (homogeneous sand), and that scCO2-brine interfacial tensions are fairly well constrained, we conclude that the observed deviations from scaling predictions resulted from scCO2-induced decreased wettability. Wettability alteration by scCO2 makes predicting hydraulic behavior more challenging than for less reactive fluids.

  14. Percepção de segurança no bairro e tempo despendido em frente à tela por adolescentes de Curitiba, Brasil

    Directory of Open Access Journals (Sweden)

    Crisley Vanessa Prado

    Full Text Available RESUMO: Objetivo: Analisar a associação entre a percepção de segurança (PS no bairro e o tempo despendido em frente à tela pelos adolescentes e verificar o papel moderador das variáveis sexo, idade e nível socioeconômico nessa relação. Métodos: Trata-se de um estudo transversal, com inquérito escolar realizado em Curitiba, Paraná. Inicialmente foram selecionadas, de modo intencional, seis escolas (três públicas e três privadas, e em seguida foi sorteada uma turma de cada período de ensino (sexto ano do ensino fundamental ao terceiro ano do ensino médio. A PS foi avaliada com a escala NEWS-Y, e o tempo diário despendido em frente à tela foi definido por aquele passado diante da televisão/vídeo/DVD, jogando videogame e utilizando a internet. Modelos de regressão logística multinomial foram utilizados para testar a associação entre a PS e essa atividade, ajustando para as variáveis moderadoras. Resultados: Participaram do estudo 776 adolescentes, com idade entre 11 e 18 anos. A PS relacionada aos crimes foi associada com o uso de videogame por adolescentes mais velhos, no sentido contrário ao esperado (p < 0,05. A PS relacionada ao tráfego de pedestres foi associada inversamente ao uso de videogame por adolescentes de maior nível socioeconômico (p < 0,05. Conclusão: A associação entre PS e tempo despendido em frente à tela é complexa para os adolescentes e difere em relação às variáveis sociodemográficas e o desfecho analisado (televisão/vídeo/DVD, videogame e internet.

  15. Suscetibilidade in vitro de isolados de Sporothrix schenckii frente à terbinafina e itraconazol In vitro susceptibility of isolates of Sporothrix schenckii to terbinafine and itraconazole

    Directory of Open Access Journals (Sweden)

    Ana Raquel Mano Meinerz

    2007-02-01

    Full Text Available O estudo objetiva determinar a atividade in vitro da terbinafina e itraconazol através da técnica de microdiluição em caldo (NCCLSM27-A2 adaptado para um fungo dimórfico frente a 12 isolados de Sporothrix schenckii, sendo seis de esporotricose felina, três de esporotricose humana, um isolado de cão e dois isolados humanos provenientes do Instituto Oswaldo Cruz (IOC. O inóculo e as concentrações antifúngicas foram distribuídas em microplacas, as quais foram incubadas a 35°C por cinco dias, quando foi realizada a leitura da concentração inibitória mínima. A concentração inibitória mínima para a terbinafina variou de 0,055µg/ml a 0,109µg/ml e para o itraconazol de 0,219µg/ml a 1,75µg/ml, sendo que para ambos os fármacos as CIMs entre os isolados do IOC foi de 0,875µg/ml. O estudo demonstrou uma alta suscetibilidade do Sporothrix schenckii frente à terbinafina, necessitando mais estudos que correlacionem os testes in vitro frente ao fármaco com a resposta clínica em pacientes com esporotricose.The study objective was to determine the in vitro activity of terbinafine and itraconazole through the microdilution technique in broth (NCCLSM27-A2, adapted for dimorphic fungus, in relation to 12 isolates of Sporothrix schenckii. Six were from feline sporotrichosis, three from human sporotrichosis, one from a dog and two from human isolates originating from Instituto Oswaldo Cruz. The inoculum and antifungal concentrates were distributed on microplates that were incubated at 35°C for five days. Minimum inhibitory concentration readings were made at the end of this period. The MIC for terbinafine ranged from 0.055µg/ml to 0.109µg/ml, and the MIC for itraconazole ranged from 0.219µg/ml to 1.75µg/ml. For both drugs, the MIC from the isolates from IOC was 0.875µg/ml. The present study demonstrates the high susceptibility of Sporothrix schenckii to terbinafine. Further studies to correlate the in vitro susceptibility tests with

  16. Utilización de los equipos de protección individual frente al riesgo biológico por el personal sanitario

    Directory of Open Access Journals (Sweden)

    Angelina Constans Aubert

    2008-03-01

    Full Text Available El objetivo de este trabajo ha sido obtener información sobre el nivel de utilización de los equipos de protección individual (EPI frente al riego biológico entre el personal que desarrolla su actividad profesional en centros sanitarios. Para ello se preparó un cuestionario, que previamente validado se aplicó a un colectivo de distintos centros sanitarios de Cataluña durante los años 2003/2004. La información obtenida en este estudio revela que la utilización de los EPI frente al riesgo biológico, entre el personal que desarrolla su actividad en centros sanitarios es elevada, aunque también evidencia que todavía es necesario corregir algunos de los procedimientos de trabajo que se siguen en dichos centros y que es necesario mejorar algunos puntos de la gestión; también es una asignatura pendiente una mejor formación e información de los trabajadores para una correcta utilización de los EPI. Finalmente, en el apartado correspondiente, se presenta una revisión exhaustiva de las Normas Técnicas relacionadas con los EPI, ropa de protección y calzado frente a microorganismos.The aim of this paper is to get information about the use of the PPE in front of biological risk in health care workers. A questionnaire has been prepared and, previous validation, has been applied to a set of hospitals in Catalonia area during 2003-2004. Information obtained indicates that the use of PPE in front of biological risk is high, but it is necessary to change some working procedures and to improve the management of PPE. It should also be improved information and worker's training for the correct use of PPE. Finally, a review of technical regulations related to PPE, protection clothes and shoes in front of microorganisms is presented.

  17. Novel virus influenza A (H1N1sw in South-Eastern France, April-August 2009.

    Directory of Open Access Journals (Sweden)

    Antoine Nougairède

    Full Text Available BACKGROUND: In April 2009, the first cases of pandemic (H1N1-2009 influenza [H1N1sw] virus were detected in France. Virological surveillance was undertaken in reference laboratories of the seven French Defence Zones. METHODOLOGY/PRINCIPAL FINDINGS: We report results of virological analyses performed in the Public Hospitals of Marseille during the first months of the outbreak. (i Nasal swabs were tested using rapid influenza diagnostic test (RIDT and two RT-PCR assays. Epidemiological characteristics of the 99 first suspected cases were analyzed, including detection of influenza virus and 18 other respiratory viruses. During three months, a total of 1,815 patients were tested (including 236 patients infected H1N1sw virus and distribution in age groups and results of RIDT were analyzed. (ii 600 sera received before April 2009 and randomly selected from in-patients were tested by a standard hemagglutination inhibition assay for antibody to the novel H1N1sw virus. (iii One early (May 2009 and one late (July 2009 viral isolates were characterized by sequencing the complete hemagglutinine and neuraminidase genes. (iiii Epidemiological characteristics of a cluster of cases that occurred in July 2009 in a summer camp were analyzed. CONCLUSIONS/SIGNIFICANCE: This study presents new virological and epidemiological data regarding infection by the pandemic A/H1N1 virus in Europe. Distribution in age groups was found to be similar to that previously reported for seasonal H1N1. The first seroprevalence data made available for a European population suggest a previous exposure of individuals over 40 years old to influenza viruses antigenically related to the pandemic (H1N1-2009 virus. Genomic analysis indicates that strains harbouring a new amino-acid pattern in the neuraminidase gene appeared secondarily and tended to supplant the first strains. Finally, in contrast with previous reports, our data support the use of RIDT for the detection of infection in

  18. Structure and geological evolution of the bedrock at southern Satakunta, SW Finland

    Energy Technology Data Exchange (ETDEWEB)

    Paulamaeki, S.; Paananen, M.; Elo, S. [Geological Survey of Finland (Finland)

    2002-02-01

    , approaches to within 5 km of the Olkiluoto site. The results of gravimetric surveys have indicated that the margin of the Eurajoki stock slopes westward underneath the site, but to depths in excess of 3000 m. Plate tectonic reconstructions of the Precambrian of Finland, partly based on the results of major deep seismic sounding experiments, such as the international GGT/SVEKA project (along a NE-SW transect through the Satakunta area), indicate the pelitic and psammitic migmatite belts in Satakunta represent parts of the early Proterozoic Southern Finland and Central Finland continental arcs, respectively. Collision of these arc complexes took place 1890 - 1880 Ma ago, when the rocks were deformed and metamorphosed for the first time. The highT/lowP metamorphism was caused by mafic underplating, which led to a strong increase in temperature, and recrystallisation and partial remelting of the rocks in the upper crust. The collision of the arc complexes is characterised by an intense magmatic activity, which appears as synorogenic granitoids. In the next stage, 1860 - 1810 Ma ago, mafic underplating caused a second high-temperature metamorphic event and partial melting of the sedimentary rocks in southern Finland, producing the late-orogenic potassium. granites, dated at 1840 - 1830 Ma. The Subjotnian rapakivi granites associated with mafic rocks, the Jotnian Satakunta sandstone formation and the Postjotnian diabase dykes and sills represent the cratonisation stages of the Svecofennides. Rapakivi granites and related mafic rocks were generated in an anorogenic extensional regime by partial melting of the upper mantle and lower crust. The Jotnian Satakunta sandstone is a fluvial sediment formation deposited in a deltaic environment. The development of the graben or rift valley, where the sandstone was deposited, may have begun already during the Subjotnian, ca. 1650 Ma ago. The olivine diabase dykes represent the feeding channels of Postjotnian flood basalts. However, no such

  19. Structure and geological evolution of the bedrock at southern Satakunta, SW Finland

    International Nuclear Information System (INIS)

    Paulamaeki, S.; Paananen, M.; Elo, S.

    2002-02-01

    , approaches to within 5 km of the Olkiluoto site. The results of gravimetric surveys have indicated that the margin of the Eurajoki stock slopes westward underneath the site, but to depths in excess of 3000 m. Plate tectonic reconstructions of the Precambrian of Finland, partly based on the results of major deep seismic sounding experiments, such as the international GGT/SVEKA project (along a NE-SW transect through the Satakunta area), indicate the pelitic and psammitic migmatite belts in Satakunta represent parts of the early Proterozoic Southern Finland and Central Finland continental arcs, respectively. Collision of these arc complexes took place 1890 - 1880 Ma ago, when the rocks were deformed and metamorphosed for the first time. The highT/lowP metamorphism was caused by mafic underplating, which led to a strong increase in temperature, and recrystallisation and partial remelting of the rocks in the upper crust. The collision of the arc complexes is characterised by an intense magmatic activity, which appears as synorogenic granitoids. In the next stage, 1860 - 1810 Ma ago, mafic underplating caused a second high-temperature metamorphic event and partial melting of the sedimentary rocks in southern Finland, producing the late-orogenic potassium. granites, dated at 1840 - 1830 Ma. The Subjotnian rapakivi granites associated with mafic rocks, the Jotnian Satakunta sandstone formation and the Postjotnian diabase dykes and sills represent the cratonisation stages of the Svecofennides. Rapakivi granites and related mafic rocks were generated in an anorogenic extensional regime by partial melting of the upper mantle and lower crust. The Jotnian Satakunta sandstone is a fluvial sediment formation deposited in a deltaic environment. The development of the graben or rift valley, where the sandstone was deposited, may have begun already during the Subjotnian, ca. 1650 Ma ago. The olivine diabase dykes represent the feeding channels of Postjotnian flood basalts. However, no such

  20. Superimposing various biophysical and social scales in a rapidly changing rural area (SW Niger)

    Science.gov (United States)

    Leduc, Christian; Massuel, Sylvain; Favreau, Guillaume; Cappelaere, Bernard; Leblanc, Marc; Bachir, Salifou; Ousmane, Boureïma

    2014-05-01

    In SW Niger, close to Niamey, a detailed hydrological survey has been developed for the last 20 years (international experiments HAPEX-SAHEL and later AMMA), investigating the distribution of water in atmosphere, surface, soil and aquifers. It covers an area of about 10 000 km2, with a series of imbricated scales of instrumentation, in time and space. This dense long term field observation led to many major scientific results. Among them, one of the most original and paradoxical is the continuous rise of the water table, even during the severe droughts of the 1970s and 1980s (about 3 m in the last 30 years). In spite of a large apparent homogeneity of the biophysical environment throughout the region, numerous heterogeneities exist at different scales, complicating the hydrological analysis. On the surface, the hydrological system was, ~6000 years ago, a structured drainage network leading to the Niger River. It was later broken into much smaller elements by aeolian dunes deposited during arid episodes and the study area now appears as a juxtaposition of hundreds of small endorheic catchments (most often 1 to 20 km2) where the surface runoff finally ends in temporary ponds. During most violent rainy events, erosion can be locally very severe and modify durably the size of the catchment and the local hydrology. Conversely, during smaller rainy events, surface runoff may never reach the ponds because it infiltrates in more permeable zones at mid-slope. The actual surface area of the catchment contributing to the surface runoff thus varies considerably with time. Because of their great number, only a few catchments are instrumented and extrapolation of measurements to ungauged catchments is an additional difficulty. Most of water temporarily stored in ponds infiltrates and recharges groundwater. The Continental Terminal (CT) aquifer system is made of three independent layers, of which the upper one (CT3) is only considered here. The CT aquifer systems is a

  1. Análisis comparativo de los resultados del uso de neocuerdas frente a la resección de velo posterior en la cirugía reparadora de la insuficiencia mitral degenerativa

    Directory of Open Access Journals (Sweden)

    Maria A. Gutierrez-Martin

    2015-01-01

    Conclusiones: Nuestro resultados demuestran que el uso de neocuerdas para la corrección del prolapso de velo posterior ofrece resultados similares tanto clínicos como ecocardiográficos a corto y medio plazo frente a la resección, incluyendo el grado de coaptación de los velos.

  2. Combinación de pantallas de cristal líquido para la modulación compleja de frentes de onda. Aplicación en reconstrucción de hologramas de Fresnel digitales.

    OpenAIRE

    Tudela Fernández, Raúl; Martín Badosa, Estela; Labastida i Juan, Ignasi, 1970-; Vallmitjana i Rico, Santiago; Carnicer González, Arturo

    2012-01-01

    En este trabajo se presentan distintas alternativas para obtener la modulación compleja completa de frentes de onda mediante la suma de la modulación introducida por dos pantallas de cristal líquido. Para los distintos métodos se presentan resultados simulados de reconstrucciones de hologramas de Fresnel digitales.

  3. Producción y caracterización de anticuerpos monoclonales frente a albúmina humana : Aplicación al estudio de la estructura antigénica de esta proteina

    OpenAIRE

    García Pacheco, José Marcos

    2011-01-01

    Se han producido 10 anticuerpos monoclonales frente a albúmina humana, los cuales reconocen 6 epitopos de naturaleza conformacional sobre la superficie de la albúmina de esta molécula, habiéndose detectado diferencias antagónicas entre albúmina humana de diferente procedencia.

  4. Impacto de la vacunación frente a la gripe (H1N1)2009 en Navarra: comparación de diferentes escenarios

    OpenAIRE

    Jesús Castilla; Marcela Guevara; Manuel García Cenoz; Fátima Irisarri; Maite Arriazu; Aurelio Barricarte; Red de Médicos Centinela; Red de Vigilancia Epidemiológica y Microbiológica de Gripe de Navarra

    2011-01-01

    Fundamento: En 2009 se realizó una campaña de vacunación específica frente a la gripe (H1N1) 2009. El objetivo de este trabajo es evaluar su impacto en Navarra. Métodos: En la cohorte de población no institucionalizada de enfermos crónicos cubiertos por el Servicio Navarro de Salud (N=131.333), asumiendo una efectividad del 100! desde el octavo día tras la administración de la vacuna pandémica, estimamos su impacto en la prevención de casos y de hospitalizaciones por gripe (H1N1) 2009 entre l...

  5. Resultados del estudio serológico tras la vacunación frente a Neisseria meningitidis serogrupo C en niños

    OpenAIRE

    María Isabel Espín Ríos

    2000-01-01

    BACKGROUND: El aumento de incidencia de enfermedad meningocócica en la Región de Murcia en la temporada 1996/97 motivó que la Dirección General de Salud desarrollara en septiembre-octubre de 1997 una Campaña de Vacunación frente al meningococo serogrupo C. El objetivo de este trabajo fue conocer el porcentaje de niños menores de 5 años de edad que mostraban seroconversión postvacunal al mes de la vacunación y el porcentaje de los mismos que conservaban inmunidad al año de la vacunación. MÉTOD...

  6. El rol del maestro frente a la construcción del juego simbólico en los niños

    Directory of Open Access Journals (Sweden)

    María Eugenia Villalobos

    2009-01-01

    Full Text Available En el presente artículo se muestran tres formas de juego espontáneo llevadas a cabo por los niños en preescolar y primero de primaria, que orientan el marco de referencia. Se busca mostrar los elementos comprensivos de los que puede disponer el maestro para ofrecer a los niños posibilidades de transformar las experiencias de juegos estereotipados, llamados juego -juguete-, en juego simbólico. La observación y análisis de las actividades de los niños muestra cómo ellos organizan nuevas representaciones a partir de los nuevos significados que otorgan a sus experiencias. Frente a estos procesos de los niños, el maestro tiene un rol primordial para favorecer las experiencias de significación que sustentan los procesos de aprendizaje

  7. APUNTES SOBRE ALGUNOS REGULADORES DEL CRECIMIENTO VEGETAL QUE PARTICIPAN EN LA RESPUESTA DE LAS PLANTAS FRENTE AL ESTRÉS ABIÓTICO

    OpenAIRE

    Licet Chávez Suárez; Alexander Álvarez Fonseca; Ramiro Ramírez Fernández

    2012-01-01

    El estrés abiótico es una de las principales causas de las pérdidas de las producciones agrícolas a nivel mundial. Los reguladores del crecimiento vegetal tales como el ácido abscícico, el etileno, el ácido jasmónico y el ácido salicílico son esenciales en la respuesta de las plantas al estrés abiótico. Se describen las generalidades de estas moléculas así como su función en la respuesta de la planta frente al estrés abiótico.

  8. Apuntes sobre algunos reguladores del crecimiento vegetal que participan en la respuesta de las plantas frente al estrés abiótico

    OpenAIRE

    Chávez Suárez, Licet; Álvarez Fonseca, Alexander; Ramírez Fernández, Ramiro

    2012-01-01

    El estrés abiótico es una de las principales causas de las pérdidas de las producciones agrícolas a nivel mundial. Los reguladores del crecimiento vegetal tales como el ácido abscícico, el etileno, el ácido jasmónico y el ácido salicílico son esenciales en la respuesta de las plantas al estrés abiótico. Se describen las generalidades de estas moléculas así como su función en la respuesta de la planta frente al estrés abiótico. The abiotic stress is one of the most significative cause of th...

  9. Protección ambiental del Río de la Plata y su frente marítimo: el marco jurídico general

    Directory of Open Access Journals (Sweden)

    Heber Arbuet Vignali

    2014-07-01

    Full Text Available Versión escrita de la conferencia dictada en el Simposio sobre aspectos jurídicos de la protección ambiental del Río de la Plata y su Frente Marítimo (Montevideo: 21 nov.2001Contenido: Introducción. Importancia del derecho en las relaciones humanas. Importancia del derecho en el asunto que nos convoca. El polifacético marco jurídico de este proyecto. La aparición de los nuevos sistemas. La nueva realidad socio política que debe ser regulada jurídicamente. Importancia de estas ideas para la protección ambiental en el Plata

  10. Tortura e transição democrática: uma análise histórica do filme “Pra frente, Brasil”

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    Paulo Jorge Corrêa Campos

    2014-06-01

    Full Text Available O presente trabalho pretende analisar o filme “Pra frente, Brasil” situando o mesmo no contexto da abertura democrática dos anos 1980. Para tal, busca-se tecer o contexto e o lugar social onde foi concebido o filme. Na análise, atenta-se para o papel da tortura presente na obra cinematográfica e para os elementos semióticos usados no filme para incutir uma visão específica no espectador. Ademais, considerando-se que o mesmo sofre censura prévia do governo, procura-se questionar a superficialidade da democracia mesmo no agonizar da ditadura civil-militar.

  11. Graduación de la responsabilidad civil del empresario y de los grupos de empresas -matrices y filiales- de Roma frente a terceros

    Directory of Open Access Journals (Sweden)

    Guillermo Suárez Blázquez

    2011-01-01

    negocios de los sometidos a patria potestad. Sin embargo, estas acciones no se caracterizan solo por tener fórmulas con transposición de sujetos. Tampoco se debe ceñir su competencia al derecho de familia. Esta tesis, aceptada de forma mayoritaria para la doctrina romanista y civilista actual, debe ser revisada. La tesis que proponemos es la extensión de estas acciones procesales al campo jurídico de la empresa, de las mercancías y del comercio, pues fueron creadas por los pretores, y desarrolladas por la jurisprudencia clásica, para conseguir un objetivo: determinar el alcance y la medida de la responsabilidad civil del comerciante, del empresario, de las empresas matrices y de las empresas filiales, en suspensión de pagos, frente a terceros ¿proveedores y clientes¿.

  12. Actividad comparativa in vitro de doripenem y de otros carbapenemes frente a Pseudomonas aeruginosa In vitro activity of doripenem and other carbapenems against Pseudomonas aeruginosa

    Directory of Open Access Journals (Sweden)

    F. Nicola

    2010-09-01

    Full Text Available Según estudios previos, el nuevo carbapeneme doripenem sería más activo frente a Pseudomonas aeruginosa en comparación con otros carbapenemes. En este estudio evaluamos la actividad in vitro del doripenem, el meropenem y el imipenem frente a 93 aislamientos de P. aeruginosa mediante los métodos de dilución en agar y de difusión con discos. Las CIM50 y CIM90 de los carbapenemes fueron (μg/ml: imipenem, 4 y 8; meropenem, 2 y 8; doripenem, 2 y 4, respectivamente. El doripenem fue 1 a 3 diluciones más activo que el imipenem para un 82% de los aislamientos. Comparado con el meropenem, el doripenem fue, 1-3 diluciones más activo frente a un 50% de los aislamientos, mientras que en el 49% la CIM fue la misma. Los porcentajes de resistencia según los métodos de dilución y de difusión fueron: imipenem = 7,5%/49,5% y meropenem = 3,2%/9,7%. Para el doripenem, estos valores variaron según los puntos de corte (PC que se consideraron: 1,1%/2,2% usando el PC del CLSI para el imipenem y el meropenem, o 1,1%/17,2% según los PC sugeridos por Brown et al. El método de difusión presentó un elevado porcentaje de errores menores en la categorización de los aislamientos respecto de la dilución en agar, lo que sobrestimó la resistencia. El doripenem mostró muy buena actividad frente a P. aeruginosa, superior a la del imipenem y al menos equiparable a la del meropenem, por lo que puede considerarse una interesante opción para el tratamiento de infecciones por esta bacteria.Doripenem, a new carbapenem, has shown to be more active against Pseudomonas aeruginosa than other carbapenems. The activity of doripenem, imipenem and meropenem was evaluated against 93 P. aeruginosa isolates, by agar dilution and disk diffusion methods. MIC50 and MIC90 were as follows (μg/ml: doripenem, 2 and 4; meropenem, 2 and 8; and imipenem, 4 and 8, respectively. Doripenem MICs were 1 to 3 dilutions lower (i.e. more active than those for imipenem in 82% of the isolates

  13. El uso del concepto “totalitarismo” en la ensayística antiperonista. El caso de Frente al totalitarismo peronista, de Reynaldo Pastor

    Directory of Open Access Journals (Sweden)

    Andrés Bisso

    2017-01-01

    Full Text Available El presente trabajo analiza el libro de Reynaldo Pastor, Frente al tota- litarismo peronista , en tanto producto tardío de la literatura de ensayo antiperonista, en el que se intenta conjugar parte de la tradición antifas- cista de cuño liberal-conservador en el marco de la renovada prédica antitotalitaria de la Guerra Fría. A partir de este análisis se tendrá en cuenta el lugar que la taxonomización política cumple como estrategia de verosimilitud en el intento que hace el autor de equiparar la experien- cia peronista con los fenómenos totalitarios –entre los que se incluye al comunismo– mediante el uso, en su texto, de columnas comparativas.

  14. Expectativas de resultados frente ao uso de álcool, maconha e tabaco Outcome expectancy considering the use of alcohol, cannabis and tobacco

    Directory of Open Access Journals (Sweden)

    Rosemeri Siqueira Pedroso

    2006-08-01

    Full Text Available Este artigo teve como objetivo realizar uma revisão teórica acerca do construto expectativas de resultados frente ao uso de álcool, maconha e tabaco. As expectativas de resultados são determinadas a partir do que as pessoas acreditam acerca dos efeitos de determinada droga, sendo uma variável importante no tratamento de dependentes químicos. Foram realizadas buscas de artigos publicados nas bases de dados MEDLINE, PsycINFO, ProQuest, Ovid, LILACS e Cork, usando os descritores belief, expectancy, expectation, drugs, psychoactive e effect. Os resultados demonstraram que as expectativas de resultados frente ao uso dessas substâncias podem surgir de fontes como: exposição a estímulos condicionados, dependência física, crenças pessoais e culturais e fatores situacionais e ambientais. Conclui-se que ainda há necessidade de novas pesquisas quanto às expectativas relacionadas às diferentes substâncias psicoativas e faixas etárias para uma melhor compreensão deste construto.This article aims to perform a theoretical review about the outcome expectancy construct considering the use of alcohol, cannabis and tobacco. Outcome expectancy is determined by people's belief about the effects of a drug. It is an important variable for the treatment of chemically dependent patients. Searches in the electronic databases MEDLINE, PsycINFO, ProQuest, Ovid, LILACS and Cork were carried out, using the following descriptors: belief, expectancy, expectation, drugs, psychoactive, and effect. Results showed that outcome expectancy considering the use of those substances can be generated from: exposure to conditioning stimuli, physical dependence, personal and cultural beliefs, and situational and environmental factors. In conclusion, there is the need of new researches on expectancies related to psychoactive substances and age groups in order to have a better understanding of this construct.

  15. Perfil fitoquímico e determinação da atividade antimicrobiana de Syzygium cumini (L. Skeels (Myrtaceae frente a microrganismos bucais

    Directory of Open Access Journals (Sweden)

    N.A.D.E.O. CARTAXO-FURTADO

    2015-01-01

    Full Text Available RESUMO Este estudo teve como objetivo determinar o perfil fitoquímico e avaliar a atividade antimicrobiana in vitro do extrato etanólico da casca do caule de Syzygium cumini(L. Skeels frente a microrganismos bucais. O perfil fitoquímico do extrato foi traçado através da determinação espectrofotométrica quantitativa para verificar o teor de taninos, flavonóides, saponinas e polifenóis. A atividade antimicrobiana foi determinada através da Concentração Inibitória Mínima (CIM, por meio da técnica de microdiluição em caldo, utilizando-se as seguintes linhagens de microrganismos: Streptococcus mutans (25175, Streptococcus oralis (10557 e Candida albicans (10231. Uma quantidade apreciável de fitocontituintes foi observada, especialmente de taninos (100,58 ± 1,81. Os extratos apresentaram atividade antimicrobiana inibindo o crescimento das linhagens em estudo, destacando-se essa atividade sobre o crescimento de C. albicans (CIM=250 µg/mL. Já as CIMs para Streptococcus foram baixas. Diante dos resultados expostos, pode-se concluir que o perfil fitoquímico foi traçado e que, dentre os microrganismos testados, o extrato etanólico da casca de S. cumini apresentou forte potencial de inibição sobre o crescimento de C. albicans e fraca inibição frente aos Streptococcus testados. Este estudo sugere que mais pesquisas devem ser realizadas dando continuidade à bioprospecção, por meio de análises experimentais com essa espécie vegetal, objetivando, no futuro, que essa planta possa ser utilizada clinicamente para tratar candidose bucal.

  16. Atitudes frente a aspectos relevantes da prática médica: estudo transversal randomizado com alunos de segundo e sexto anos

    Directory of Open Access Journals (Sweden)

    Adriana Rainha Mascia

    Full Text Available Estudo transversal com duas amostras randomizadas de 50 alunos do segundo e 50 do sexto ano de graduação em Medicina. Foi aplicado um questionário com questões abertas e a escala "Instrumento de avaliação de atitudes de estudantes de medicina frente a aspectos relevantes da prática médica" (Colares, 2002. A escala contém 52 questões referentes à: 1. Aspectos psicológicos e emocionais nas doenças orgânicas e mentais; 2. Manejo de situações relacionadas à morte; 3. Atenção primária à saúde; 4. Aspectos relacionados à doença mental; 5. Contribuição do médico ao avanço científico da medicina; 6. Outros aspectos relacionados à atuação médica e às políticas de saúde. As atitudes são categorizadas em positivas, negativas e conflitantes. Observou-se que os estudantes apresentaram atitudes positivas frente a pelo menos três dos seis aspectos abordados; os alunos do segundo ano e do sexto ano apresentaram diferença estatisticamente significativa (chi² = 6,901, g.l. = 1, p < 0,05 nas atitudes relacionadas ao fator 2 (manejo de situações relacionadas à morte.

  17. Ejercicio tradicional de la partería frente a su profesionalización: estudio de caso en Jalisco, México

    Directory of Open Access Journals (Sweden)

    Jorge Laureano-Eugenio

    2016-09-01

    Full Text Available Objetivo: analizar el estado de la partería en Jalisco, México, frente al proceso de profesionalización. Metodología: Estudio de caso, realizado desde junio de 2011 a julio de 2013 en tres momentos: I. Entrevistas a profundidad con 20 parteras, II. Cuatro asambleas regionales con 44 parteras, III. Una asamblea estatal con 136 parteras, personal de salud y otros actores sociales, retomando técnicas educativas populares. Los datos cualitativos fueron analizados bajo el modelo actancial semiótico y los datos sociodemográficos de parteras en Epi Info 7, realizando una meta-inferencia con ambos hallazgos. Resultados: 180 parteras informantes, 89% de zona rural, media de edad 56 años, 73% con estudios de secundaria o menos, 95% son parteras tradicionales, adoptando esta práctica desde la adolescencia, capacitándose en instituciones de salud y entre las mismas parteras; 16,7% estudiaron enfermería buscando posicionamiento institucional, sin dejar de ser parteras. Actualmente otorgan atención materno-infantil y a nosologías tradicionales, aludiendo abandono institucional. Existen posturas de rechazo y aceptación de su incorporación al sector salud en médicos y enfermeras, mientras que otros actores sociales, piden su reconocimiento. Conclusiones: la partería en Jalisco, México, es una práctica tradicional vital, con o sin reconocimiento institucional, transformándose en respuesta a necesidades de atención, teniendo que considerar el perfil sociodemográfico de las parteras, su papel actual, la perspectiva del personal de salud y otros actores sociales, junto con la estrecha relación sociocultural y económica del país, frente a su profesionalización.

  18. Bioatividade de três espécies vegetais nativas da Floresta Atlântica brasileira frente ao microcrustáceo Artemia salina

    Directory of Open Access Journals (Sweden)

    W.M Pompilho

    2014-09-01

    Full Text Available Este trabalho teve por objetivo a investigação fitoquímica e propriedades antioxidantes de extratos das folhas de Trigynaea oblongifolia Schltdl (Annonaceae, Ottonia frutescens Trel (Piperaceae, e Bathysa australis (St Hill Hooz (Rubiaceae, bem como avaliar, in vitro, a letalidade frente ao microcrustáceo Artemia salina Leach. Os extratos foram preparados por maceração em metanol 10% (p/v por sete dias, à temperatura ambiente. A atividade antioxidante dos extratos foi determinada pela metodologia que utiliza o radical estável DPPH. A toxicidade dos extratos foi avaliada frente ao microcrustáceo A. salina. Os extratos de O. frutescens e B. australis apresentaram as seguintes classes de metabólitos secundários: Alcalóides, Antraquinonas, Cumarinas, Polifenóis (Taninos, Saponinas. Nos extratos de T. oblongifolia, além dos metabólitos citados anteriormente, foi detectada a presença de Flavonóides. A atividade antioxidante, observada em 30 minutos na concentração de 24 µg/mL de extrato, foi de: O. frutescens - 38,3%, T. oblongifolia - 32,3%, e B. australis - 32,1%. A Concentração Letal, CL50, dos extratos em A. salina foi de: O. frutescens - 149,75 ± 1,02 µg/mL, T. oblongifolia - 148,8 ± 1,74 µg/mL, e B. australis - 684 ± 9,04 µg/mL. Neste contexto, destacamos as espécies, nativas da Floresta Atlântica, O. frutescens e T. oblongifolia de grande potencial na bioprospecção de moléculas biologicamente ativas.

  19. ECONOMICAL VIABILITY OF PRESERVATIVE TREATMENT OF Prosopis juliflora (SW D.C. WOOD SUBMITTED TO SAP DISPLACEMENT METHOD

    Directory of Open Access Journals (Sweden)

    Desmoulis Wanderley de Farias Sobrinho

    2008-06-01

    Full Text Available This work aimed to evaluate the economical viability of preservative treatment of Prosopis juliflora (Sw D.C. roundpieces treated with Osmose CCB commercial preservative applied by sap displacement method in rural property and to comparetheir costs with Mimosa caesalpiniifolia, Mimosa tenuiflora and Prosopis juliflora non-treated pieces costs. The treatment of Prosopisjuliflora wood demonstrated to be economically viable when compared to alternatives using the Equivalent Annual Costs (EACs, fordiscount rates of 12; 15; and 18% and expected useful life varying from 16 to 30 years, in these situations treated Prosopis juliflorawood presented smaller EAC than Mimosa caesalpiniifolia, Mimosa tenuiflora and Prosopis juliflora non-treated woods for theanalyzed situations, that justifies the employment of the Prosopis juliflora treated logs as fence posts and other similar uses.

  20. Ostracoda and foraminifera as short-term tracers of environmental changes in very polluted areas: the Odiel Estuary (SW Spain)

    International Nuclear Information System (INIS)

    Ruiz, F.; Gonzalez-Regalado, M.L.; Borrego, J.; Abad, M.; Pendon, J.G.

    2004-01-01

    The analysis of 17 cores collected in the Odiel Estuary (SW Spain) permits delimiting the recent evolution of this zone during the past decades and the influence of natural and anthropogenic factors on the distribution of Ostracoda and Foraminifera. In the upper estuary, the coincidence of acid waters, prolonged subaerial exposure, and coarse sediments may explain the absence or the disappearance of these microorganisms during the industrial period (1966-1985) in the major part of this area. In the lower estuary, sedimentary evolution and industrial wastes are the main factors influencing both the distribution and trends of the populations of these two groups. Finally, the main changes observed in the marine estuary are due to the sedimentary effects of the construction of two banks and the dredging of the main estuarine channel. - In a polluted estuary, the meiofaunal assemblages experience different changes even in adjacent sedimentary environments, closely related to anthropogenic and natural causes

  1. Long-term persistence of acquired resistance to 5-fluorouracil in the colon cancer cell line SW620

    Energy Technology Data Exchange (ETDEWEB)

    Tentes, I.K., E-mail: itentes@med.duth.gr [Department of Biochemistry, Medical School, Democritus University of Thrace, 6th km Alexandroupolis-Komotini (Dragana), 68100 Alexandroupolis (Greece); Schmidt, W.M. [Center for Anatomy and Cell Biology, Waehringer Strasse 13, 1090 Vienna (Austria); Krupitza, G. [Institute of Clinical Pathology, Medical University of Vienna, Waehringer Guertel 18-20, 1090 Vienna (Austria); Steger, G.G.; Mikulits, W. [Department of Medicine I, Medical University of Vienna, Medical University of Vienna, Waehringer Guertel 18-20, 1090 Vienna (Austria); Kortsaris, A. [Department of Biochemistry, Medical School, Democritus University of Thrace, 6th km Alexandroupolis-Komotini (Dragana), 68100 Alexandroupolis (Greece); Mader, R.M. [Department of Medicine I, Medical University of Vienna, Medical University of Vienna, Waehringer Guertel 18-20, 1090 Vienna (Austria)

    2010-11-15

    Treatment resistance to antineoplastic drugs represents a major clinical problem. Here, we investigated the long-term stability of acquired resistance to 5-fluorouracil (FU) in an in vitro colon cancer model, using four sub-clones characterised by increasing FU-resistance derived from the cell line SW620. The resistance phenotype was preserved after FU withdrawal for 15 weeks ({approx} 100 cell divisions) independent of the established level of drug resistance and of epigenetic silencing. Remarkably, resistant clones tolerated serum deprivation, adopted a CD133{sup +} CD44{sup -} phenotype, and further exhibited loss of membrane-bound E-cadherin together with predominant nuclear {beta}-catenin localisation. Thus, we provide evidence for a long-term memory of acquired drug resistance, driven by multiple cellular strategies (epithelial-mesenchymal transition and selective propagation of CD133{sup +} cells). These resistance phenomena, in turn, accentuate the malignant phenotype.

  2. Effects of taxol and ionizing radiation on cytotoxicity and prostaglandin production in KB, RPMI-2650, SW-13 and L929

    International Nuclear Information System (INIS)

    Lee, Keon Il; Yoo, Dong Soo

    1998-01-01

    The author evaluated the effects of taxol, a microtubular inhibitor, as a possible radiation sensitizer and the production of prostaglandins on three human cancer cell lines (KB, RPMI-2650 and SW-13) and one murine cell line (L929). Each cell line was divided into four groups (control, taxol only, radiation only and combination of taxol and radiation). The treatment consisted of a single irradiation of 10 Gy and graded doses (5, 50, 100, 200, 300, 500 nM) of taxol for a 24-h period. The cytotoxicity of taxol alone was measured at 1 day after (1-day group) and 4 days after (4-day group) the treatment. The survival ratio of cell was analyzed by MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-dimethyl tetrazolium bromide) test. Prostaglandins (PGE2 and PGI2) were measured in the culture medium by a radioimmunoassay. The results obtained were as follows ; 1. There was a significantly in creased cytotoxicity of KB cells in 4-day group than those in 1-day group. There was a high correlation between doses of taxol and cell viability in both groups (1-day group R=0.82741, 4-day group R=0.84655). 2. There was a significantly increased cytotoxicity of RPMI-2650 cells treated with high concentration of taxol in 4-day group than those in 1-day group. Also there was a high correlation between doses of taxol and cell viability in 4-day group (R=0.93917). 3. There was a significantly increased cytotoxicity of SW-13 cell treated with high concentration of taxol in 4-day group than those in 1-day group. However no high correlation was observed between doses of taxol and cell viability in both groups (1-day group R=0.46362, 4-day group R=0.65425). 4. There was a significantly increased cytotoxicity of L929 cells treated with low concentration of taxol in 4-day group than those in 1-day group. At the same time, there was a low correlation between doses of taxol and cell viability in both groups (1-day group R=0.34237, 4-day group R=0.23381). 5. In 1-day group of L929 cells, higher

  3. Geological mapping of investigation trench OL-TK18 at the Olkiluoto study site, Eurajoki, SW Finland

    Energy Technology Data Exchange (ETDEWEB)

    Engstroem, J. [GTK Geological Survey of Finland, Espoo (Finland)

    2012-04-15

    Survey of Finland at the Olkiluoto study site, Eurajoki, as part of Posiva Oy's site investigation programme for the development of an underground repository for nuclear waste. The E-W striking, ca. 55 m long trench is located in the central part of the Olkiluoto Island adjacent to investigation trenches OL-TK12 and OL-TK4. The trench was cleaned with a pressure washer and pressurized air. The rock types were determined macroscopically. The rock types in investigation trench OL-TK18 is of heterogeneous character, with a large variation in their composition. The rocks vary from tonalitic-granodioritic gneiss to diatexitic gneiss, with portions of K-feldspar porphyritic gneiss. Inclusions of mica gneiss and a well-preserved schollen migmatite is encountered. The trench ends in a feldspar-rich pegmatoid. The most dominant tectonic feature is D{sub 4} ductile deformation domain and associated S{sub 4} foliation. This domain and hence the S{sub 4} foliation is striking NE-SW with a moderate dip towards SE. Both ends of the trench are dominated by the earlier deformation phase, showing S{sub 3} foliation striking ENE-WSW and roughly dipping towards the S. The S{sub 3} foliation is associated with small-scaled granitic leucosome veining, while the S{sub 4} foliation have a schistose character and it is more sheared. D{sub 4} ductile deformation domain is also characterised by a sheared blastomylonitic rock having growth of roundish feldspar porphyroblasts and BTschlierens indicating high alteration of the protolith. During the fracture mapping, all fractures intersecting the central thread were investigated and a total of 117 fractures were recorded. The average fracture frequency of the trench is 2.11 fractures/m. On the basis of fracture orientations one main set can be distinguished striking NE-SW (foliation parallel) with a moderate dip towards the SE. The median fracture trace length is 1.6 m and over half of the fractures exceed 1.5 m trace length, the longest

  4. Search for near-infrared counterparts of IRAS embedded sources in the M17 SW giant molecular cloud

    International Nuclear Information System (INIS)

    Elmegreen, D.M.; Phillips, J.; Beck, K.; Thomas, H.; Howard, J.

    1988-01-01

    Wide-field near-infrared and blue band plates of the region containing the M17 giant molecular cloud complex have been blinked to locate bright near-infrared stars that may be embedded in the M17 SW giant molecular cloud. Twenty such stars coincided with the positions of IRAS point sources that appeared embedded based on color-color diagrams. Some of these stars may be the sources of the infrared luminosities. Of the 20 stars, seven were too faint to appear on the B band plate. The optical magnitudes and colors determined from the plate image diameters were measured for the other 13 coincident stars; they are most likely upper main-sequence or pre-main-sequence stars with extinctions of 7 mag. The IRAS luminosity-temperature diagram indicates that the embedded sources in M17 are more massive than those in the Orion cloud. 35 references

  5. GERMINAÇÃO DE SEMENTES DE SABIÁ (MIMOSA CAESALPINIAEFOLIA BENTH. E ALGAROBA (PROSOPIS JULIFLORA (SW DC

    Directory of Open Access Journals (Sweden)

    Salvador Barros Torres

    1994-12-01

    Full Text Available Estudou-se o efeito da temperatura e do substrato sobre a germinação de sementes de sabiá (Mimosa caesalpiniaefolia Benth. e algaroba (Prosopis juliflora (SW DC em condições de laboratório. Foram testadas as temperaturas de 25°C e 30°C constantes e 20-30°C alternadas em substratos de papel toalha, papel mata-borrão e areia. O melhor resultado de germinação para as sementes de sabiá foi obtido com a temperatura de 20-30°C em substrato de papel mata-borrão e a mesma temperatura em substrato de areia, para sementes de algaroba.

  6. Far-ultraviolet Bidirectional Photometry of Apollo Soil 10084: New Results from The Southwest Ultraviolet Reflectance Chamber (SwURC).

    Science.gov (United States)

    Raut, U.

    2017-12-01

    We report new measurements of the far-ultraviolet (115-180 nm) bidirectional reflectance of Apollo soil 10084 in the Southwest Ultraviolet Reflectance Chamber (SwURC). We find the bidirectional reflectance distribution function (BRDF) to be featureless in this wavelength region, though with a small blue slope. The angular distribution of the BRDF at Ly-α and 160 nm shows that this mature mare soil, containing nanophase Fe and enriched in Ti, anisotropically scatters light in the forward direction. The phase angle dependence of the BRDF is fitted with Hapke's photometric model with an additional diffuse-directional term. Future plans include measurements of mare and highland soils of differing maturity index (Is/FeO), water ice frost and lunar soil-ice aggregates. Such measurements will help constrain the abundance and distribution of the water ice on the illuminated lunar surface and dark permanently shadowed regions of the moon, as reported by LRO-LAMP.

  7. Microseismic Monitoring of Stimulating Shale Gas Reservoir in SW China: 2. Spatial Clustering Controlled by the Preexisting Faults and Fractures

    Science.gov (United States)

    Chen, Haichao; Meng, Xiaobo; Niu, Fenglin; Tang, Youcai; Yin, Chen; Wu, Furong

    2018-02-01

    Microseismic monitoring is crucial to improving stimulation efficiency of hydraulic fracturing treatment, as well as to mitigating potential induced seismic hazard. We applied an improved matching and locating technique to the downhole microseismic data set during one treatment stage along a horizontal well within the Weiyuan shale gas play inside Sichuan Basin in SW China, resulting in 3,052 well-located microseismic events. We employed this expanded catalog to investigate the spatiotemporal evolution of the microseismicity in order to constrain migration of the injected fluids and the associated dynamic processes. The microseismicity is generally characterized by two distinctly different clusters, both of which are highly correlated with the injection activity spatially and temporarily. The distant and well-confined cluster (cluster A) is featured by relatively large-magnitude events, with 40 events of M -1 or greater, whereas the cluster in the immediate vicinity of the wellbore (cluster B) includes two apparent lineations of seismicity with a NE-SW trending, consistent with the predominant orientation of natural fractures. We calculated the b-value and D-value, an index of fracture complexity, and found significant differences between the two seismicity clusters. Particularly, the distant cluster showed an extremely low b-value ( 0.47) and D-value ( 1.35). We speculate that the distant cluster is triggered by reactivation of a preexisting critically stressed fault, whereas the two lineations are induced by shear failures of optimally oriented natural fractures associated with fluid diffusion. In both cases, the spatially clustered microseismicity related to hydraulic stimulation is strongly controlled by the preexisting faults and fractures.

  8. SiRNA-mediated IGF-1R inhibition sensitizes human colon cancer SW480 cells to radiation

    International Nuclear Information System (INIS)

    Yavari, Kamal; Taghikhani, Mohammad; Mesbah-Namin, Seyed A.; Maragheh, Mohammad Ghannadi; Babaei, Mohammad Hosein; Arfaee, Ali Jabbary; Madani, Hossein; Mirzaei, Hamid Reza

    2010-01-01

    Purpose. Insulin like growth factor receptor 1 (IGF-1R) is well-documented to play a key role in radiation response and tumor radiosensitivity, thus offering an attractive clinic drug target to enhance tumor sensitivity to anti-cancer radiotherapy. Material and methods. Human colon carcinoma SW480 cells were transfected with the specific small interference RNA (siRNA) expression vector (pkD-shRNA-IGF-1R-V2) designed to target IGF-1R mRNA. The expression of IGF-1R mRNA and its protein among the transfected and untransfected cells were detected by semi-quantitative RT-PCR and ELISA assay. The changes in cell radiosensitivity were examined by MTT assay. Results. Transfection of mammalian expression vector pkD containing IGF-1R siRNA was shown to reduce IGF-1R mRNA levels by up to 95%. ELISA assay detected a similar inhibition of IGF-1R protein levels in cells transfected with IGF-1R siRNA. SW480 cells transfected with the expression vector for siRNA significantly rendered cells more sensitive to radiation and the highest radiation enhancement ratio was 2.02 ± 0.08. Conclusion. These data provide the first evidence that specific siRNA fragment (pkD-shRNA-IGF-1R-V2) targeting human IGF-1R mRNA is able to enhance colon cancer radiosensitivity. Also results indicated that, combining IGF-1R siRNA and radiation significantly enhances antitumor efficacy compared with either modality alone

  9. FAR-ULTRAVIOLET SPECTROSCOPY OF THE NOVA-LIKE VARIABLE KQ MONOCEROTIS: A NEW SW SEXTANTIS STAR?

    International Nuclear Information System (INIS)

    Wolfe, Aaron; Sion, Edward M.; Bond, Howard E.

    2013-01-01

    New optical spectra obtained with the SMARTS 1.5 m telescope and archival International Ultraviolet Explorer (IUE) far-ultraviolet (FUV) spectra of the nova-like variable KQ Mon are discussed. The optical spectra reveal Balmer lines in absorption as well as He I absorption superposed on a blue continuum. The 2011 optical spectrum is similar to the KPNO 2.1 m IIDS spectrum we obtained 33 years earlier except that the Balmer and He I absorption is stronger in 2011. Far-ultraviolet IUE spectra reveal deep absorption lines due to C II, Si III, Si IV, C IV, and He II, but no P Cygni profiles indicative of wind outflow. We present the results of the first synthetic spectral analysis of the IUE archival spectra of KQ Mon with realistic optically thick, steady-state, viscous accretion-disk models with vertical structure and high-gravity photosphere models. We find that the photosphere of the white dwarf (WD) contributes very little FUV flux to the spectrum and is overwhelmed by the accretion light of a steady disk. Disk models corresponding to a WD mass of ∼0.6 M ☉ , with an accretion rate of order 10 –9 M ☉ yr –1 and disk inclinations between 60° and 75°, yield distances from the normalization in the range of 144-165 pc. KQ Mon is discussed with respect to other nova-like variables. Its spectroscopic similarity to the FUV spectra of three definite SW Sex stars suggests that it is likely a member of the SW Sex class and lends support to the possibility that the WD is magnetic.

  10. Study of influences of the first bunching cavity and injection conditions of rf SW linacs on particle transverse motions

    International Nuclear Information System (INIS)

    Lin Yuzheng; Tong Dechun; Sun Xiang; Xu Guanghua; Zhao Zhentang

    1990-01-01

    For both medical and radiographic standing wave linear accelerators, a small beam spot diameter is always pursued. In order to minimize the size and weight of the machine and reduce the power dissipation, rf focusing is preferred to the focusing solenoid coil. Therefore, it is important to study behaviours of beam transverse motions in the rf fields for the design of SW linacs. The research shows that the transverse motion behaviours of the electron beam in the compact linac is mainly determined by the rf field distribution on the first bunching cavity and injection conditions of the beam. In this paper, a beam envelope equation is presented,the proprties of the E z , E r , H θ field distributions of various first bunching cavities of both symmetric and asymmetric are studied, and then the rf electric force and rf magnetic force exerting on the beam with a different injection time are analysed. It is demonstrated that the asymmetric first bunching cavity with a small gradient of E z (z) field will provide a larger transverse emittance. And an asymmetric cavity with a larger front aperture and a small back aperture is favourable to make a smaller gradient of E z (z) field. For both symmetric and asymmetric first bunching cavity, by adopting an appropriate negative injection angle the envelopes of the beam are all decreased obviously, the optimum injection angle being always around -3 deg. The measured result of the beam spot of a 4 MeV SW linac shows that the mentioned simulation calculation of the radial dynamics above is in good agreement with the measured result

  11. Earthquake-induced soft-sediment deformations and seismically amplified erosion rates recorded in varved sediments of Köyceğiz Lake (SW Turkey)

    KAUST Repository

    Avsar, Ulas; Jonsson, Sigurjon; Avşar, Ö zgü r; Schmidt, Sabine

    2016-01-01

    sequence of Köyceğiz Lake (SW Turkey) that we compare with estimated peak ground acceleration (PGA) values of several nearby earthquakes. We find that earthquakes exceeding estimated PGA values of ca. 20 cm/s2 can induce soft-sediment deformations (SSD

  12. B-cell translocation gene 3 overexpression inhibits proliferation and invasion of colorectal cancer SW480 cells via Wnt/β-catenin signaling pathway.

    Science.gov (United States)

    Mao, D; Qiao, L; Lu, H; Feng, Y

    2016-01-01

    Increasing evidences have shown that B-cell translocation gene 3 (BTG3) inhibits metastasis of multiple cancer cells. However, the role of BTG3 in colorectal cancer (CRC) and its possible mechanism have not yet been reported. In our study, we evaluated BTG3 expression in several CRC cell lines. Then, pcDNA3.1-BTG3 was transfected into SW480 cells. We found that BTG3 was upregulated in SW480 cells after overexpression plasmid transfection. BTG3 overexpression significantly inhibited cell growth and decreased PCNA (proliferating cell nuclear antigen) and Ki67 levels. BTG3 overexpression markedly downregulated Cyclin D1 and Cyclin E1 levels, whereas elevated p27. Overexpression of BTG3 arrested the cell cycle at G1 phase, which was abrogated by p27 silencing. Furthermore, migration, invasion and EMT of SW480 cells were significantly suppressed by BTG3 overexpression. Further investigations showed the inhibition of Wnt/β-catenin signaling pathway. We then used GSK3β specific inhibitor SB-216763 to activate the Wnt/β-catenin signaling pathway. We found that Wnt/β-catenin signaling pathway activation reversed the effect of BTG3 overexpression on cell proliferation, cell cycle progression, invasion and EMT. In conclusion, BTG3 overexpression inhibited cell growth, induced cell cycle arrest and suppressed the metastasis of SW480 cells via the Wnt/β-catenin signaling pathway. BTG3 may be considered as a therapeutic target in CRC treatment.

  13. A paraptosis-like cell death induced by δ-tocotrienol in human colon carcinoma SW620 cells is associated with the suppression of the Wnt signaling pathway

    International Nuclear Information System (INIS)

    Zhang, Jing-Shu; Li, Da-Ming; He, Ning; Liu, Ying-Hua; Wang, Chun-Hua; Jiang, Shu-Qing; Chen, Bing-Qing; Liu, Jia-Ren

    2011-01-01

    Tocotrienol is considered a beneficial effect agent on inhibition of tumor development. In this study, we focused on the effects of δ-tocotrienol and its possible mechanism on induction of death in human colon cancer SW620 cells. δ-Tocotrienol inhibited proliferation of SW620 cell in a dose-dependent manner. Our findings showed that δ-tocotrienol effectively induced paraptosis-like death in SW620 cells, correlated with the vacuolation that may be from welling and fusion of mitochondria and/or the endoplasmic reticulum (ER) as well as caspase-3 nonactivated. However, there were no changes in apoptosis based on flow cytometry analysis. Of being noted, δ-tocotrienol reduced the expression of β-catenin and wnt-1 proteins by about 50% at the highest dose (20 μmol/L). δ-Tocotrienol also decreased cyclin D1, c-jun and MMP-7 protein levels in SW620 cells. Altogether, these data indicate that δ-tocotrienol induces paraptosis-like cell death, which is associated with the suppression of the Wnt signaling pathway. Thus, our findings may provide a novel application in treatment of human colon carcinoma.

  14. Description of the early stages of Eccopsis galapagana Razowski & Landry (Lepidoptera: Tortricidae), a defoliator of Prosopis juliflora (Sw.) DC (Fabaceae) in Colombia

    Science.gov (United States)

    The biology and early stages of Eccopsis galapagana Razowski & Landry are described and illustrated for the first time; details of the adults also are provided. Under outbreak conditions, the species has become a serious pest of algarrobo tree (Prosopis juliflora (Sw.) DC.; Fabaceae) in Colombia. Al...

  15. TESTING TREE-CLASSIFIER VARIANTS AND ALTERNATE MODELING METHODOLOGIES IN THE EAST GREAT BASIN MAPPING UNIT OF THE SOUTHWEST REGIONAL GAP ANALYSIS PROJECT (SW REGAP)

    Science.gov (United States)

    We tested two methods for dataset generation and model construction, and three tree-classifier variants to identify the most parsimonious and thematically accurate mapping methodology for the SW ReGAP project. Competing methodologies were tested in the East Great Basin mapping un...

  16. The influence of survivin shRNA on the cell cycle and the invasion of SW480 cells of colorectal carcinoma

    Directory of Open Access Journals (Sweden)

    Yu Jin

    2008-07-01

    Full Text Available Abstract Background The objective was to understand the influence of Survivin plasmid with short hairpin RNA (shRNA on the cell cycle, invasion, and the silencing effect of Survivin gene in the SW480 cell of colorectal carcinoma. Methods A eukaryotic expression vector, PGCH1/Survivin shRNA, a segment sequence of Survivin as target, was created and transfected into colorectal carcinoma cell line SW480 by the non-lipid method. The influence on the Survivin protein was analyzed by Western blotting, while the cell cycle, cell apoptosis were analyzed by flow cytometry, and invasion of the cell was analyzed by Transwell's chamber method. Results After the transfection of PGCH1/Survivin shRNA, the expression of Survivin protein in SW480 cells was dramatically decreased by 60.68%, in which the cells were stopped at G2/M phase, even though no apoptosis was detected. The number of transmembranous cells of the experimental group, negative control group, and blank control group were 14.46 ± 2.11, 25.12 ± 8.37, and 25.86 ± 7.45, respectively (P 0.05. Conclusion Survivin shRNA could significantly reduce the expression of Survivin protein and invasion of SW480 cells. Changes in cell cycle were observed, but no apoptosis was induced.

  17. Cell and nuclear enlargement of SW480 cells induced by a plant lignan, arctigenin: evaluation of cellular DNA content using fluorescence microscopy and flow cytometry.

    Science.gov (United States)

    Kang, Kyungsu; Lee, Hee Ju; Yoo, Ji-Hye; Jho, Eun Hye; Kim, Chul Young; Kim, Minkyun; Nho, Chu Won

    2011-08-01

    Arctigenin is a natural plant lignan previously shown to induce G(2)/M arrest in SW480 human colon cancer cells as well as AGS human gastric cancer cells, suggesting its use as a possible cancer chemopreventive agent. Changes in cell and nuclear size often correlate with the functionality of cancer-treating agents. Here, we report that arctigenin induces cell and nuclear enlargement of SW480 cells. Arctigenin clearly induced the formation of giant nuclear shapes in SW480, as demonstrated by fluorescence microscopic observation and quantitative determination of nuclear size. Cell and nuclear size were further assessed by flow cytometric analysis of light scattering and fluorescence pulse width after propidium iodide staining. FSC-H and FL2-W values (parameters referring to cell and nuclear size, respectively) significantly increased after arctigenin treatment; the mean values of FSC-H and FL2-W in arctigenin-treated SW480 cells were 572.6 and 275.1, respectively, whereas those of control cells were 482.0 and 220.7, respectively. Our approach may provide insights into the mechanism behind phytochemical-induced cell and nuclear enlargement as well as functional studies on cancer-treating agents.

  18. Long term rise of a free aquifer in Sahel: hydrodynamic and radioisotopic estimations (3H, 14C) of the recharge in SW Niger

    International Nuclear Information System (INIS)

    Favreau, G.

    2001-01-01

    This article summarizes an hydrodynamic and geochemical survey carried out in SW Niger in order to estimate the impact of rainfall changes and deforestation on the recharge of the uppermost Cretaceous aquifer. 14 C and 3 H activities of the total dissolved inorganic carbon have been used to quantify the long-term recharge of the aquifer. (J.S.)

  19. Coupling between SW monsoon-related surface and deep ocean processes as discerned from continuous particle flux measurements and correlated satellite data

    Digital Repository Service at National Institute of Oceanography (India)

    Rixen, T.; Haake, B.; Ittekkot, V.; Guptha, M.V.S.; Nair, R.R.; Schlussel, P.

    . The particle flux in the eastern Arabian Sea is as high as in the central Arabian Sea but is influenced by a weaker upwelling system along the Indian Coast. The observed interannual variability in the pattern of particle fluxes during the SW monsoons is most...

  20. The search for reliable aqueous solubility (Sw) and octanol-water partition coefficient (Kow) data for hydrophobic organic compounds; DDT and DDE as a case study

    Science.gov (United States)

    Pontolillo, James; Eganhouse, R.P.

    2001-01-01

    The accurate determination of an organic contaminant?s physico-chemical properties is essential for predicting its environmental impact and fate. Approximately 700 publications (1944?2001) were reviewed and all known aqueous solubilities (Sw) and octanol-water partition coefficients (Kow) for the organochlorine pesticide, DDT, and its persistent metabolite, DDE were compiled and examined. Two problems are evident with the available database: 1) egregious errors in reporting data and references, and 2) poor data quality and/or inadequate documentation of procedures. The published literature (particularly the collative literature such as compilation articles and handbooks) is characterized by a preponderance of unnecessary data duplication. Numerous data and citation errors are also present in the literature. The percentage of original Sw and Kow data in compilations has decreased with time, and in the most recent publications (1994?97) it composes only 6?26 percent of the reported data. The variability of original DDT/DDE Sw and Kow data spans 2?4 orders of magnitude, and there is little indication that the uncertainty in these properties has declined over the last 5 decades. A criteria-based evaluation of DDT/DDE Sw and Kow data sources shows that 95?100 percent of the database literature is of poor or unevaluatable quality. The accuracy and reliability of the vast majority of the data are unknown due to inadequate documentation of the methods of determination used by the authors. [For example, estimates of precision have been reported for only 20 percent of experimental Sw data and 10 percent of experimental Kow data.] Computational methods for estimating these parameters have been increasingly substituted for direct or indirect experimental determination despite the fact that the data used for model development and validation may be of unknown reliability. Because of the prevalence of errors, the lack of methodological documentation, and unsatisfactory data

  1. Phosphatidylinositol 5-phosphate 4-kinase type II beta is required for vitamin D receptor-dependent E-cadherin expression in SW480 cells

    International Nuclear Information System (INIS)

    Kouchi, Zen; Fujiwara, Yuki; Yamaguchi, Hideki; Nakamura, Yoshikazu; Fukami, Kiyoko

    2011-01-01

    Highlights: → We analyzed Phosphatidylinositol 5-phosphate kinase IIβ (PIPKIIβ) function in cancer. → PIPKIIβ is required for vitamin D receptor-mediated E-cadherin upregulation in SW480. → PIPKIIβ suppresses cellular motility through E-cadherin induction in SW480 cells. → Nuclear PIP 2 but not plasma membrane-localized PIP 2 mediates E-cadherin upregulation. -- Abstract: Numerous epidemiological data indicate that vitamin D receptor (VDR) signaling induced by its ligand or active metabolite 1α,25-dihydroxyvitamin D 3 (1α,25(OH) 2 D 3 ) has anti-cancer activity in several colon cancers. 1α,25(OH) 2 D 3 induces the epithelial differentiation of SW480 colon cancer cells expressing VDR (SW480-ADH) by upregulating E-cadherin expression; however, its precise mechanism remains unknown. We found that phosphatidylinositol-5-phosphate 4-kinase type II beta (PIPKIIβ) but not PIPKIIα is required for VDR-mediated E-cadherin induction in SW480-ADH cells. The syntenin-2 postsynaptic density protein/disc large/zona occludens (PDZ) domain and pleckstrin homology domain of phospholipase C-delta1 (PLCδ1 PHD) possess high affinity for phosphatidylinositol-4,5-bisphosphate (PI(4,5)P 2 ) mainly localized to the nucleus and plasma membrane, respectively. The expression of syntenin-2 PDZ but not PLCδ1 PHD inhibited 1α,25(OH) 2 D 3 -induced E-cadherin upregulation, suggesting that nuclear PI(4,5)P 2 production mediates E-cadherin expression through PIPKIIβ in a VDR-dependent manner. PIPKIIβ is also involved in the suppression of the cell motility induced by 1α,25(OH) 2 D 3 . These results indicate that PIPKIIβ-mediated PI(4,5)P 2 signaling is important for E-cadherin upregulation and inhibition of cellular motility induced by VDR activation.

  2. Diferentes níveis de cálcio e o desenvolvimento de plantas de estilosantes (Stylosanthes guyanensis (Aubl. Sw. cv "Cook" Growth of stylo plants as affected by calcium levels (Stylosanthes guyanensis (Aubl. Sw. cv "Cook"

    Directory of Open Access Journals (Sweden)

    J.D. Rodrigues

    1993-09-01

    Full Text Available O presente experimento teve como finalidade estudar os efeitos de níveis de cálcio no desenvolvimento de plantas de Stylosanthes guyanensis (Aubl. Sw. cv "Cook", em sua fase vegetativa, através dos parâmetros que compõem a análise fisiológica de crescimento e de que forma estes parâmetros se alteram, em função dos tratamentos utilizados. Delinearam-se quatro tratamentos, a saber: T1 (200 mg de cálcio/litro; T2 (133,33 mg de cálcio/litro; T3 (66,66 mg de cálcio/litro; T4 (omisso em cálcio. O experimento foi instalado em cultivo hidropônico, empregando-se solução nutritiva n° 1 de Hoagland & Arnon (1950 e conduzido em casa de vegetação. O experimento, inteiramente casualizado, obedeceu ao delineamento de parcelas sub-divididas, considerando-se as cinco coletas, realizadas a intervalos de 14 dias como parcelas, sendo os tratamentos empregados definidos como sub-parcelas. A influência dos diferentes tratamentos, foi avaliada através da área foliar (AF, área foliar específica (AFE, razão de massa foliar (RMF e razão de área foliar (RAF. Dos resultados obtidos, pôde-se concluir que plantas de estilosantes, durante a fase de crescimento vegetativo, alcançaram melhor desenvolvimento em níveis de 200 mg de cálcio/litro de solução nutritiva.The influence of calcium levels on the growth of Stylosanthes guyanensis (Aubl. SW. c v "Cook" plants was studied under the following treatments: T1 (200 mg of calcium/litre; T2 (133.33 mg of calcium/litre; T3 (66.66 mg of calcium/litre and T4 (without calcium. The study was carried out in a hydroponic media with Hoagland & Arnon's number one nutrient solution. The experiment was designed as a completely randomized split-plot design, considering the five samplings performed in 14 day intervals as main plots. The influence of different treatments was evaluated through leaf area (LA, specific leaf area (SLA, leaf weight ratio (LWR, and leaf area ratio (LAR. The results obtained indicated

  3. Características tecnológicas da Prosopis juliflora (Sw. DC. e alternativas para o uso racional Technological characteristics of Prosopis juliflora (sw. DC. and alternatives for its rational use

    Directory of Open Access Journals (Sweden)

    Juáres J. Gomes

    2007-10-01

    Full Text Available Objetivando contribuir para maior conhecimento sobre as essências arbóreas existentes no nordeste brasileiro, buscou-se através deste trabalho determinar as características tecnológicas da algaroba (Prosopis juliflora (Sw. DC e indicar alternativas de uso de sua madeira para construções rurais. A caracterização da espécie foi feita conforme valores, referentes à condição padrão de umidade (12%, obtidos em ensaios realizados de acordo com a NBR 7190 da Associação Brasileira de Norma Técnicas. Foram realizados ensaios de densidades básica e aparente, teor de umidade e de resistência à compressão paralela, tração paralela e cisalhamento, paralelo às fibras. Os resultados foram analisados pela comparação dos valores obtidos com aqueles encontrados na literatura, para outras madeiras. De acordo com os resultados, conclui-se que a madeira da algaroba se equipara em resistência e rigidez, às madeiras tradicionalmente utilizadas nas construções, no Brasil.This work was carried out with the objective of increasing the knowledge on the existing wild trees species in north-eastern Brazil. The main purpose was to determine the technological characteristics of the Prosopis juliflora (Sw. DC and to indicate alternative use of its wood for agricultural constructions. The procedures adapted for the characterization of the species were in agreement with the Brazilian Norm 7190 of Brasilian Association of Technical Norms referring to the standard conditions moisture content of 12%. Tests of basic and apparent densities were carried out, moisture content and parallel fibers resistance to compression, traction and shear, were measured. The results were analyzed through the comparison of the values obtained with those found in literature for other kinds of wood. In agreement with the results, it was concluded that the Prosopis juliflora's wood can be compared with other traditional kinds of wood used in Brazil.

  4. Gamma (γ) tocopherol upregulates peroxisome proliferator activated receptor (PPAR) gamma (γ) expression in SW 480 human colon cancer cell lines

    Science.gov (United States)

    Campbell, Sharon E; Stone, William L; Whaley, Sarah G; Qui, Min; Krishnan, Koyamangalath

    2003-01-01

    Background Tocopherols are lipid soluble antioxidants that exist as eight structurally different isoforms. The intake of γ-tocopherol is higher than α-tocopherol in the average US diet. The clinical results of the effects of vitamin E as a cancer preventive agent have been inconsistent. All published clinical trials with vitamin E have used α-tocopherol. Recent epidemiological, experimental and molecular studies suggest that γ-tocopherol may be a more potent chemopreventive form of vitamin E compared to the more-studied α-tocopherol. γ-Tocopherol exhibits differences in its ability to detoxify nitrogen dioxide, growth inhibitory effects on selected cancer cell lines, inhibition of neoplastic transformation in embryonic fibroblasts, and inhibition of cyclooxygenase-2 (COX-2) activity in macrophages and epithelial cells. Peroxisome proliferator activator receptor γ (PPARγ) is a promising molecular target for colon cancer prevention. Upregulation of PPARγ activity is anticarcinogenic through its effects on downstream genes that affect cellular proliferation and apoptosis. The thiazolidine class of drugs are powerful PPARγ ligands. Vitamin E has structural similarity to the thiazolidine, troglitazone. In this investigation, we tested the effects of both α and γ tocopherol on the expression of PPARγ mRNA and protein in SW 480 colon cancer cell lines. We also measured the intracellular concentrations of vitamin E in SW 480 colon cancer cell lines. Results We have discovered that the α and γ isoforms of vitamin E upregulate PPARγ mRNA and protein expression in the SW480 colon cancer cell lines. γ-Tocopherol is a better modulator of PPARγ expression than α-tocopherol at the concentrations tested. Intracellular concentrations increased as the vitamin E concentration added to the media was increased. Further, γ-tocopherol-treated cells have higher intracellular tocopherol concentrations than those treated with the same concentrations of

  5. Gamma (γ) tocopherol upregulates peroxisome proliferator activated receptor (PPAR) gamma (γ) expression in SW 480 human colon cancer cell lines

    International Nuclear Information System (INIS)

    Campbell, Sharon E; Stone, William L; Whaley, Sarah G; Qui, Min; Krishnan, Koyamangalath

    2003-01-01

    Tocopherols are lipid soluble antioxidants that exist as eight structurally different isoforms. The intake of γ-tocopherol is higher than α-tocopherol in the average US diet. The clinical results of the effects of vitamin E as a cancer preventive agent have been inconsistent. All published clinical trials with vitamin E have used α-tocopherol. Recent epidemiological, experimental and molecular studies suggest that γ-tocopherol may be a more potent chemopreventive form of vitamin E compared to the more-studied α-tocopherol. γ-Tocopherol exhibits differences in its ability to detoxify nitrogen dioxide, growth inhibitory effects on selected cancer cell lines, inhibition of neoplastic transformation in embryonic fibroblasts, and inhibition of cyclooxygenase-2 (COX-2) activity in macrophages and epithelial cells. Peroxisome proliferator activator receptor γ (PPARγ) is a promising molecular target for colon cancer prevention. Upregulation of PPARγ activity is anticarcinogenic through its effects on downstream genes that affect cellular proliferation and apoptosis. The thiazolidine class of drugs are powerful PPARγ ligands. Vitamin E has structural similarity to the thiazolidine, troglitazone. In this investigation, we tested the effects of both α and γ tocopherol on the expression of PPARγ mRNA and protein in SW 480 colon cancer cell lines. We also measured the intracellular concentrations of vitamin E in SW 480 colon cancer cell lines. We have discovered that the α and γ isoforms of vitamin E upregulate PPARγ mRNA and protein expression in the SW480 colon cancer cell lines. γ-Tocopherol is a better modulator of PPARγ expression than α-tocopherol at the concentrations tested. Intracellular concentrations increased as the vitamin E concentration added to the media was increased. Further, γ-tocopherol-treated cells have higher intracellular tocopherol concentrations than those treated with the same concentrations of α-tocopherol. Our data suggest that

  6. Justificación y alcance de las medidas de seguridad, acciones de control frente al delito: una mirada desde el control de legalidad

    Directory of Open Access Journals (Sweden)

    Edwin Rodríguez Peña

    2011-01-01

    Full Text Available Resumen:El presente trabajo tiene como finalidad argumentar desde una postura teórico-conceptual, a partir de una reflexión jurídico-filosófica, de la justificación y alcance de las medidas de seguridad privativas de la libertad como ejercicio de control punitivo del Estado, a partir de los principios de justicia, proporcionalidad y legalidad de las actuaciones del operador de justicia y posibles violaciones al principio de inocencia y de libertad. Mediante la puesta en escena de un marco jurisprudencial, también pretende ilustrar el alcance de estas medidas frente a los derechos fundamentales y su carácter político. Así las cosas, se parte de los antecedentes de las medidas de seguridad frente a la penas y sus distintas modalidades para luego establecer las relaciones y concesiones entre la sentencia de condena y las medidas impuestas durante la etapa de sindicación e imputación dentro del proceso penal garantizando así el ejercicio del mismo y su carácter garantista frente a la víctima y a la sociedad. Así mismo, se mira la institución del Derecho Penal a través del proceso, en donde el Estado persigue al sindicado hasta llegar a la idea de justicia y reparación. Por último, se imprime un carácter holista a la evaluación social de los perjuicios y situaciones de tensión que se presentan al momento de poner de manifiesto la vulneración de derechos fundamentales.Palabras Claves:Garantismo, debido proceso, control de legalidad, medidas de seguridad.Abstract:This paper aims to argue from a theoretical and conceptual approach, from a legal-philosophical reflection, justification and scope of safety measures involving deprivation of liberty as an exercise of punitive control of the state, from the beginning justice, proportionality and legality of the actions of the operator of justice. By means of the jurisprudential framework, this article also aims to illustrate the scope of these measures facing the fundamental rights and

  7. Wavefront-guided refractive surgery results of training-surgeons Resultados das cirurgias refrativas guiadas por frentes de ondas de cirurgiões em treinamento

    Directory of Open Access Journals (Sweden)

    Iane Stillitano

    2010-08-01

    Full Text Available PURPOSE: To assess clinical outcomes and changes on higher-order aberrations (HOA after wavefront-guided laser in situ keratomileusis (LASIK and photorefractive keratectomy (PRK for correction of myopia and myopic astigmatism performed by training-surgeons. METHODS: One hundred and seventy patients had customized LASIK (207 eyes and PRK (103 eyes performed by surgeons in-training using the LADARVision 4000 (Alcon, Fort Worth, TX. Preoperative and 1, 3, 6 and 12 months postoperative data of spherical equivalent (SE, best spectacle-corrected visual acuity (BSCVA and uncorrected visual acuity (UCVA were analysed. Wavefront changes were determined using the LADARWave Hartmann-Shack wavefront aberrometer and the pupil size was scaled for 6.5 mm. RESULTS: The mean SE in the LASIK group was -3.04 ±1.07 D and in the PRK group was -1.60 ± 0.59 D. At 1-year follow-up, (80.6% (LASIK and (66.7% (PRK were within ± 0.50 D of the intended refraction. The UCVA was 20/20 or better in (58.1% (LASIK and (66.7% (PRK of the operated eyes. A statistically significant positive correlation was found between achieved versus attempted refractive correction in both groups: LASIK (r=0.975, POBJETIVO: Avaliar os resultados clínicos e mudanças nas aberrações de alta-ordem (HOA, após ceratomileuse assistida por excimer laser in situ (LASIK e ceratectomia fotorrefrativa (PRK guiados por frentes de onda para correção da miopia e astigmatismo miópico realizada por cirurgiões em treinamento. MÉTODOS: Estudo prospectivo de 170 pacientes submetidos a LASIK personalizado (207 olhos e PRK (103 olhos realizados por cirurgiões em treinamento utilizando o LADARVision 4000 (Alcon, Fort Worth, TX. Dados do equivalente esférico (SE, melhor acuidade visual corrigida (BSCVA e acuidade visual não corrigida (UCVA foram analisados no pré-operatório e com 1, 3, 6 e 12 meses de pós-operatório. As alterações de frentes de onda foram determinadas usando o aberrômetro Hartmann

  8. Hairpin-Hairpin Molecular Beacon Interactions for Detection of Survivin mRNA in Malignant SW480 Cells.

    Science.gov (United States)

    Ratajczak, Katarzyna; Krazinski, Bartlomiej E; Kowalczyk, Anna E; Dworakowska, Beata; Jakiela, Slawomir; Stobiecka, Magdalena

    2018-05-07

    Cancer biomarkers offer unique prospects for the development of cancer diagnostics and therapy. One of such biomarkers, protein survivin (Sur), exhibits strong antiapoptotic and proliferation-enhancing properties and is heavily expressed in multiple cancers. Thus, it can be utilized to provide new modalities for modulating the cell-growth rate, essential for effective cancer treatment. Herein, we have focused on the development of a new survivin-based cancer detection platform for colorectal cancer cells SW480 using a turn-on fluorescence oligonucleotide molecular beacon (MB) probe, encoded to recognize Sur messenger RNA (mRNA). Contrary to the expectations, we have found that both the complementary target oligonucleotide strands as well as the single- and double-mismatch targets, instead of exhibiting the anticipated simple random conformations, preferentially formed secondary structure motifs by folding into small-loop hairpin structures. Such a conformation may interfere with, or even undermine, the biorecognition process. To gain better understanding of the interactions involved, we have replaced the classical Tyagi-Kramer model of interactions between a straight target oligonucleotide strand and a hairpin MB with a new model to account for the hairpin-hairpin interactions as the biorecognition principle. A detailed mechanism of these interactions has been proposed. Furthermore, in experimental work, we have demonstrated an efficient transfection of malignant SW480 cells with SurMB probes containing a fluorophore Joe (SurMB-Joe) using liposomal nanocarriers. The green emission from SurMB-Joe in transfected cancer cells, due to the hybridization of the SurMB-Joe loop with Sur mRNA hairpin target, corroborates Sur overexpression. On the other hand, healthy human-colon epithelial cells CCD 841 CoN show only negligible expression of survivin mRNA. These experiments provide the proof-of-concept for distinguishing between the cancer and normal cells by the proposed

  9. Deep-Sea Mega-Epibenthic Assemblages from the SW Portuguese Margin (NE Atlantic Subjected to Bottom-Trawling Fisheries

    Directory of Open Access Journals (Sweden)

    Sofia P. Ramalho

    2017-11-01

    Full Text Available Bottom-trawling fisheries are a common threat to the health of continental margins worldwide. Together with numerous environmental and biological processes, physical disturbance induced by trawlers can largely shape the benthic habitats and their associated assemblages. At the SW Portuguese Margin, crustacean bottom trawlers have exploited deep-sea habitats for a few decades, but its effects on the benthic biodiversity are practically unknown. During the spring-summer of 2013 and 2014, several Remotely Operated Vehicle (ROV video transects were used to investigate mega-epibenthic abundance, composition, and diversity in soft-sediment areas subjected to varying trawling pressures off Sines and Setúbal (200–800 m. Differences in mega-epibenthic assemblages were linked with environmental changes (depth, grain size, primary productivity and trawling disturbance. The effect of trawling was assessed between segments with similar habitat characteristics, i.e., muddy-sand bottoms between 300 and 500 m. Areas subjected to intensive trawling pressure showed a generally flattened seabed, with abundant recent trawl marks (up to 3 scars.100 m−1, indicating that the seabed physical integrity was compromised. Significant negative correlations were detected between various mega-epibenthic diversity indices [S, H′, and ET(20] and trawling pressure (h.cell−1.y−1. Furthermore, the distinct mega-epibenthic assemblages and absence of several sessile erect morphospecies at both low and highly disturbed locations by trawling off Sines, namely all seapen morphospecies found in non-trawled areas, demonstrates the negative influence of trawling fisheries on the benthic component of the study area. Also, low dissimilarity between assemblages from the main fishing grounds and the adjacent low-disturbance locations, suggests that the potentially negative influence of trawling can extend beyond the targeted areas (e.g., by the plumes of re-suspended sediments. The

  10. Metabauxite horizons containing remobilized-origin gem diaspore and related mineralization, Milas-Muğla province, SW Turkey

    Science.gov (United States)

    Hatipoğlu, Murat; Türk, Necdet; Chamberlain, Steven C.; Murat Akgün, A.

    2010-10-01

    Remobilized-origin gem diaspore and related minerals occur as infill within structurally controlled voids that developed in the upper of two distinct karst unconformity-type metabauxite (diasporite) horizons in the İlbir Mountains area of the Milas-Muğla province, SW Turkey. Colour-change diaspore (trademarked as zultanite) and associated mineral specimens (greenish muscovite, chloritoid, donbassite, specular hematite, ilmenite, goethite, and younger calcite) occur in fracture zones (veins and open structures) that cross-cut the metabauxite horizons. The mineralized fracture zones do not extend into the enclosing marbles, probably because of the ductility contrast between the brittle bauxite and relatively plastic carbonate beds. Thick, white to light gray and dark gray limestone beds were deposited in the İlbir Mountains area during the Cretaceous (146-65 Ma), and contain two stratigraphically distinct karst-fill bauxite horizons. Al-, Fe-, Si- and Ti-rich solutions that infiltrated the karstified limestone probably originated from altered schist and gneiss that surround the basin. The limestone beds (>2000 m thick) were subjected to burial metamorphism, forming marble. Subsequently, the marble block was folded during nappe emplacement toward the SSW as part of late Alpine contractional deformation during the Paleogene (65-23.8 Ma). The upper bauxite horizons within the folded block were cross-cut by fracture zones because of their relatively brittle rheology. At this time, increased pressure and temperature in the bauxite horizons resulted in remobilization of the primary constituents of the bauxite within an aqueous complex, resulting in the crystallization of coarse-grained assemblages in the cross-cutting structures. Ultimately, erosion and mineral exploration revealed the steeply dipping bauxite outcrops and mine workings evident today. This paper focuses on the mine geology of surface outcrops of diasporic bauxite, the upper bauxite horizon within

  11. Preparación de los adultos mayores en los Estados Unidos para hacer frente a los desastres naturales: encuesta a escala nacional

    Directory of Open Access Journals (Sweden)

    Tala M. Al-rousan

    2014-12-01

    Full Text Available OBJETIVOS: Nos propusimos determinar el grado de preparación frente a los desastres naturales de los adultos mayores en los Estados Unidos y evaluar los factores que pueden afectar negativamente la salud y la seguridad durante este tipo de incidentes. MÉTODOS: Obtuvimos una muestra de adultos de 50 años en adelante (n = 1 304 de la encuesta del 2010 del Estudio de la Salud y la Jubilación (HRS por su sigla en inglés. La encuesta recogió datos sobre las características demográficas generales, el estado de discapacidad o las limitaciones funcionales, y también sobre factores y comportamientos relacionados con la preparación frente a los desastres. Calculamos una puntuación global de preparación mediante indicadores individuales a fin de evaluar el grado de preparación general. RESULTADOS: La media de la edad de los participantes (n = 1 304 fue de 70 años (desviación estándar [DE] = 9,3. Solo 34,3% informaron que habían participado en un programa formativo o que habían leído materiales sobre la preparación para los desastres. Casi 15% indicaron que usaban dispositivos médicos eléctricos que podían correr riesgo de no funcionar si se interrumpiera el suministro eléctrico. La puntuación de preparación indicó que la edad más avanzada, la discapacidad física y el menor nivel de escolaridad y de ingresos se asociaban independiente y significativamente a un grado de preparación general inferior. CONCLUSIONES: A pesar de la mayor vulnerabilidad ante los desastres y del número cada vez mayor de adultos mayores en los Estados Unidos, muchos de los problemas sustanciales que encontramos son remediables y requieren atención en los sectores de la sociedad dedicados a la atención clínica, a la salud pública y al manejo de situaciones de emergencia.

  12. Preparación de los adultos mayores en los Estados Unidos para hacer frente a los desastres naturales: encuesta a escala nacional*

    Science.gov (United States)

    Al-rousan, Tala M.; Rubenstein, Linda M.; Wallace, Robert B.

    2015-01-01

    Objetivos. Nos propusimos determinar el grado de preparación frente a los desastres naturales de los adultos mayores en los Estados Unidos y evaluar los factores que pueden afectar negativamente la salud y la seguridad durante este tipo de incidentes. Métodos. Obtuvimos una muestra de adultos de 50 años en adelante (n = 1 304) de la encuesta del 2010 del Estudio de la Salud y la Jubilación (HRS por su sigla en inglés). La encuesta recogió datos sobre las características demográficas generales, el estado de discapacidad o las limitaciones funcionales, y también sobre factores y comportamientos relacionados con la preparación frente a los desastres. Calculamos una puntuación global de preparación mediante indicadores individuales a fin de evaluar el grado de preparación general. Resultados. La media de la edad de los participantes (n = 1 304) fue de 70 años (desviación estándar [DE] = 9,3). Solo 34,3% informaron que habían participado en un programa formativo o que habían leído materiales sobre la preparación para los desastres. Casi 15% indicaron que usaban dispositivos médicos eléctricos que podían correr riesgo de no funcionar si se interrumpiera el suministro eléctrico. La puntuación de preparación indicó que la edad más avanzada, la discapacidad física y el menor nivel de escolaridad y de ingresos se asociaban independiente y significativamente a un grado de preparación general inferior. Conclusiones. A pesar de la mayor vulnerabilidad ante los desastres y del número cada vez mayor de adultos mayores en los Estados Unidos, muchos de los problemas sustanciales que encontramos son remediables y requieren atención en los sectores de la sociedad dedicados a la atención clínica, a la salud pública y al manejo de situaciones de emergencia.

  13. Sociedad y políticas sociales en Uruguay: desde la transición democrática al gobierno del frente amplio

    Directory of Open Access Journals (Sweden)

    Gustavo de ARMAS CURIEL

    2009-11-01

    Full Text Available RESUMEN: Durante los últimos veinte años Uruguay ha experimentado diversas transformaciones en su economía y sociedad. Luego del crecimiento sostenido de la economía uruguaya entre 1984 y 1998, y de la consecuente reducción de la pobreza (de 46% a 15%, el país atravesó una de las peores crisis económicas de su historia: el Producto Bruto Interno (PBI disminuyó en más de 20% y el porcentaje de población pobre se duplicó, alcanzando entre los niños niveles similares a los de 1986. Durante este período, en Uruguay se han ido consolidando algunos fenómenos de exclusión social que obedecen a causas estructurales más profundas. Frente a este panorama, el gobierno del Frente Amplio elegido en el 2004 se propone desarrollar una serie de cambios en el campo de las políticas sociales. En este contexto, deberá enfrentar varios desafíos: entre otros, la transformación de la arquitectura del Estado de Bienestar uruguayo construido a comienzos del siglo XX y la reasignación del gasto público social.ABSTRACT: During the last twenty years Uruguay has experienced several economic and social changes. After a period of economic growth between 1984 and 1998, and the consequent reduction of poverty rates (from 46% to 15%, the country went through one of the worst economic crisis of its history: The GDP was reduced in a 20% and the poverty rate was increased from 15% to 33%, reaching the same levels of 1986 among children. During this period, Uruguay has consolidated several processes of social exclusion produced by structural causes. In this context, ?the new government elected in 2004, is developing a set of changes in social policies and will have to face several challenges: the transformation of the architecture of its traditional Welfare State, built in the beginnings of the 20th century, and the relocation of the social budget.

  14. Comportamiento frente a la corrosión y biocompatibilidad in vitro/in vivo de la aleación AZ31 modificada superficialmente

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    Escudero, M. L.

    2011-06-01

    Full Text Available The present work evaluates the corrosion behaviour and the in vitro/in vivo biocompatibility of the AZ31 magnesium alloy, which fulfills the mechanical requirements of bone. The corrosion kinetic of as-received AZ31 alloy was not compatible with the cell growth. To improve its performance, the AZ31 alloy was surface modified by a chemical conversion treatment in hydrofluoric acid. The magnesium fluoride layer generated by the surface treatment of AZ31 alloy enhances its corrosion behaviour, allowing the in vitro growth of osteoblastic cells over the surface and the in vivo formation of a highly compact layer of new bone tissue. These results lead to consider the magnesium fluoride coating as necessary for potential use of the AZ31 alloy as biodegradable and absorbable implant for bone repair.En el presente trabajo se ha estudiado el comportamiento frente a la corrosión y la biocompatibilidad in vitro/in vivo de la aleación de magnesio AZ31, cuyas propiedades mecánicas son superiores a los requisitos mecánicos del hueso. La aleación en estado de recepción ha mostrado una cinética de corrosión no compatible con el crecimiento celular. Para mejorar su comportamiento, el material ha sido modificado superficialmente mediante tratamiento de conversión química en ácido fluorhídrico. La capa de fluoruro de magnesio generada tras este tratamiento mejora el comportamiento del material frente a la corrosión, permitiendo el crecimiento in vitro de células osteoblásticas sobre su superficie y la formación in vivo de una capa de nuevo tejido óseo muy compacta. Estos resultados permiten concluir que el recubrimiento de fluoruro de magnesio es necesario para que el material AZ31 pueda ser potencialmente aplicado como implante biodegradable y reabsorbible en reparaciones óseas.

  15. Impacto de la vacunación frente a la gripe (H1N12009 en Navarra: comparación de diferentes escenarios

    Directory of Open Access Journals (Sweden)

    Jesús Castilla

    2011-01-01

    Full Text Available Fundamento: En 2009 se realizó una campaña de vacunación específica frente a la gripe (H1N1 2009. El objetivo de este trabajo es evaluar su impacto en Navarra. Métodos: En la cohorte de población no institucionalizada de enfermos crónicos cubiertos por el Servicio Navarro de Salud (N=131.333, asumiendo una efectividad del 100! desde el octavo día tras la administración de la vacuna pandémica, estimamos su impacto en la prevención de casos y de hospitalizaciones por gripe (H1N1 2009 entre las semanas 47/2009 y 3/2010. Resultados: En las nueve semanas del estudio se diagnosticaron 973 casos de síndrome gripal (7 por 1000. El 28! fueron debidos a gripe (H1N1 2009. Además hubo 14 personas hospitalizadas con confirmación virológica (11 por 100.000. Con una cobertura de vacuna del 19! (frente al 40! de la estacional se logró prevenir el 7,7! de los casos y el 10,5! de las hospitalizaciones durante el periodo de estudio. Se administraron 1.092 dosis de vacuna pandémica por cada caso prevenido y 15.021 dosis por cada hospitalización evitada. Con una cobertura idéntica a la de la vacuna estacional se habría conseguido prevenir 16,2! de los casos y 22,2! de las hospitalizaciones. Si se hubiese duplicado esta cobertura y adelantado la campaña de vacunación dos semanas se habrían prevenido 70,7! de los casos y 68,0! de los ingresos, necesitando 261 dosis para prevenir un caso y 6206 dosis para evitar una hospitalización. Conclusión: A pesar de la elevada efectividad de la vacuna su impacto en Navarra fue mínimo, debido a la baja cobertura y al inicio tardío de la campaña de vacunación.

  16. Conocimientos, actitudes y prácticas frente a la sexualidad en estudiantes admitidos a los programas presenciales diurnos en la Universidad Francisco de Paula SantanderConocimientos, actitudes y prácticas frente a la sexualidad en estudiantes admitidos a los programas presenciales diurnos en la Universidad Francisco de Paula SantanderConocimientos, actitudes y prácticas frente a la sexualidad en estudiantes admitidos a los programas presenciales diurnos en la Universidad Francisco de Paula Santander

    Directory of Open Access Journals (Sweden)

    Patricia Vélez-Laguado

    2010-12-01

    Full Text Available Los jóvenes inician su vida universitaria en una etapa crítica del desarrollo como es la adolescencia, en donde se dan procesos trascendentales que necesitan de una adecuada estructuración de su sexualidad fundamentada en una educación sexual orientada al bienestar integral de la persona, a través del desarrollo del pensamiento crítico, la asertividad, la autonomía y la toma de decisiones. En este estudio descriptivo, se pretendió valorar los conocimientos, actitudes y prácticas de los estudiantes adolescentes frente a la sexualidad, mediante una encuesta aplicada a 206 universitarios de ambos sexos, en edad promedio de 17 años, con el fin de generar nueva información para otras investigaciones en el área sexual y de igual manera implementar actividades formativas dirigidas al fortalecimiento de comportamientos que permitan una sexualidad responsable, evitando los vacíos de conocimientos sobre formas de contagio para Virus de Inmunodeficiencia Humana (VIH y la utilización del preservativo en los diferentes tipos de relaciones sexuales, determinantes que inciden en la salud integral del adolescente.

  17. Production of ethanol from mesquite [Prosopis juliflora (SW) D.C.] pods mash by Zymomonas mobilis in submerged fermentation

    Energy Technology Data Exchange (ETDEWEB)

    Silva, Celiane Gomes Maia da [Universidade Federal Rural de Pernambuco (UFRPE), Recife, PE (Brazil). Dept. de Ciencias Domesticas; Andrade, Samara Alvachian Cardoso; Schuler, Alexandre Ricardo Pereira [Universidade Federal de Pernambuco (UFPE), Recife, PE (Brazil). Dept. de Engenharia Quimica; Souza, Evandro Leite de [Universidade Federal da Paraiba (UFPB), Joao Pessoa, PB (Brazil). Dept. de Nutricao; Stamford, Tania Lucia Montenegro [Universidade Federal de Pernambuco (UFPE), Recife, PE (Brazil). Dept. de Nutricao], E-mail: tlmstamford@yahoo.com.br

    2011-01-15

    Mesquite [Prosopis juliflora (SW) D.C.], a perennial tropical plant commonly found in Brazilian semi-arid region, is a viable raw material for fermentative processes because of its low cost and production of pods with high content of hydrolyzable sugars which generate many compounds, including ethanol. This study aimed to evaluate the use of mesquite pods as substrate for ethanol production by Z. mobilis UFPEDA- 205 in a submerged fermentation. The fermentation was assessed for rate of substrate yield to ethanol, rate of ethanol production and efficiency of fermentation. The very close theoretical (170 g L{sup -1}) and experimental (165 g L{sup -1}) maximum ethanol yields were achieved at 36 h of fermentation. The highest counts of Z. mobilis UFEPEDA-205 (both close to 6 Log cfu mL{sup -1}) were also noted at 36 h. Highest rates of substrate yield to ethanol (0.44 g ethanol g glucose{sup -1}), of ethanol production (4.69 g L{sup -1} h{sup -1}) and of efficiency of fermentation (86.81%) were found after 30 h. These findings suggest mesquite pods as an interesting substrate for ethanol production using submerged fermentation by Z. mobilis. (author)

  18. Bergy Bit and Melt Water Trajectories in Godthåbsfjord (SW Greenland Observed by the Expendable Ice Tracker

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    Daniel F. Carlson

    2017-08-01

    Full Text Available Icebergs and bergy bits makes up a significant component of the total freshwater flux from the Greenland Ice Sheet to the ocean. Observations of iceberg trajectories are biased toward larger icebergs and, as a result, the drift characteristics of smaller icebergs and bergy bits are poorly understood. In an attempt to fill this critical knowledge gap, we developed the open-source EXpendable Ice TrackEr (EXITE. EXITE is a low-cost, satellite-tracked GPS beacon capable of high-resolution temporal measurements over extended deployment periods (30 days or more. Furthermore, EXITE can transform to a surface drifter when its host iceberg capsizes or fragments. Here we describe basic construction of an EXITE beacon and present results from a deployment in Godthåbsfjord (SW Greenland in August 2016. Overall, EXITE trajectories show out-fjord surface transport, in agreement with a simple estuarine circulation paradigm. However, eddies and abrupt wind-driven reversals reveal complex surface transport pathways at time scales of hours to days.

  19. Calculations of chemisorption of hydrogen and nitrogen on titanium using Xα-SW and SCF-CI methods

    International Nuclear Information System (INIS)

    Hung, S.C.

    1983-01-01

    Two theoretical studies are used as examples of chemisorption on transition metal surfaces. The first calculation employs the SCF-Sα-SW method to determine the electronic structures of several close-packed Ti-Ti and Ti-H systems. The relative importance of Ti s, p, and electron bonding to its Ti neighbors and to H are reported. The roles of the d electrons in the Ti-Ti and Ti-H bond are discussed. The effect of the presence of an H atom on the first few layers of the metal is also studied. The second set of calculations employs the Hartree-Fock-Roothaan SCF formulation supplemented by configuration-interaction (CI) to determine the energetics of adsorption of an N 2 molecule at a Ti surface. These calculations are made tractable by using a Ti core potential and by a unitary localization transformation to define a local surface region of localized lattice plus adsorbate orbitals. The results show that an underlayer of N atoms forms at the octahedral sites. The calculated adsorption energy of 115 kcal/mole compares favorably with experiment. Binding energy contributions in the several successive steps of the calculations are discussed. Eigenvalue spectra for the selected lattice-adsorbate geometries are compared to the UPS experimental data

  20. Sewage-induced disturbance on polychaetes inhabiting intertidal mussel beds of Brachidontes rodriguezii off Mar del Plata (SW Atlantic, Argentina.

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    Rodolfo Elías

    2006-12-01

    Full Text Available Continuous and short-term disturbances are produced on intertidal Brachidontes rodriguezii mussel beds by the sewage outfall of Mar del Plata, SW Atlantic. The effects on the associated polychaetes living on and between mussels were investigated, in both the spatial and short-term temporal scales. Multivariate methods show that the polychaete fauna was influenced by tidal level, total amount of sediment accumulated between mussels, distance from the sewage outfall, organic carbon of interstitial sediments, and sewage volume before and after the summer season. Environmental variables in the water column fitted with a spatial and temporal organic gradient. Capitella ‘capitata’ sp. showed typical opportunistic behaviour in relation to organic enrichment, as did Neanthes succinea, both being numerically dominant near the sewage discharge. Cirratulus sp., Caulleriella alata, and Boccardia polybranchia were common at intermediate distances from the outfall. Syllis prolixa, S. gracilis, and Protoariciella uncinata reached their highest abundance at intermediate stations and were characteristic of the control site. Close to the outfall mussel density and dominance is low, and opportunist polychaetes successfully colonize organically enriched interstitial sediments. At intermediate distances from the outfall sediments retained by mussels reach their maximum values, and density of polychaetes is also high. The control station is characterized by monolayered mussel beds and very low diversity of polychaetes. Opportunistic polychaetes increase in response to short-term increases of sewage discharge during the summer season (November-March.

  1. Rock Outcrops Redistribute Organic Carbon and Nutrients to Nearby Soil Patches in Three Karst Ecosystems in SW China.

    Directory of Open Access Journals (Sweden)

    Dianjie Wang

    Full Text Available Emergent rock outcrops are common in terrestrial ecosystems. However, little research has been conducted regarding their surface function in redistributing organic carbon and nutrient fluxes to soils nearby. Water that fell on and ran off 10 individual rock outcrops was collected in three 100 × 100 m plots within a rock desertification ecosystem, an anthropogenic forest ecosystem, and a secondary forest ecosystem between June 2013 and June 2014 in Shilin, SW China. The concentrations of total organic carbon (TOC, total nitrogen (N, total phosphorus (P, and potassium (K in the water samples were determined during three seasons, and the total amounts received by and flowing out from the outcrops were calculated. In all three ecosystems, TOC and N, P, and K were found throughout the year in both the water received by and delivered to nearby soil patches. Their concentrations and amounts were generally greater in forested ecosystems than in the rock desertification ecosystem. When rock outcrops constituted a high percentage (≥ 30% of the ground surface, the annual export of rock outcrop runoff contributed a large amount of organic carbon and N, P, and K nutrients to soil patches nearby by comparison to the amount soil patches received via atmospheric deposition. These contributions may increase the spatial heterogeneity of soil fertility within patches, as rock outcrops of different sizes, morphologies, and emergence ratios may surround each soil patch.

  2. THE NEW ECLIPSING CV MASTER OTJ192328.22+612413.5—A POSSIBLE SW SEXTANTIS STAR

    International Nuclear Information System (INIS)

    Kennedy, M. R.; Callanan, P.; Bouanane, S.; Garnavich, P. M.; Rose, B. M.; Szkody, P.; Bendjoya, P.; Abe, L.; Rivet, J. P.; Suarez, O.

    2016-01-01

    We present optical photometry and spectroscopy of the new eclipsing cataclysmic variable MASTER OTJ192328.22+612413.5, discovered by the MASTER team. We find the orbital period to be P = 0.16764612(5) day/4.023507(1) hr. The depth of the eclipse (2.9 ± 0.1 mag) suggests that the system is nearly edge on, and modeling of the system confirms the inclination to be between 81.°3 and 83.°6. The brightness outside the eclipse varies between observations, with a change of 1.6 ± 0.1 mag. Spectroscopy reveals double-peaked Balmer emission lines. By using spectral features matching a late M-type companion, we bound the distance to be 750 ± 250 pc, depending on the companion’s spectral type. The source displays 2 mag brightness changes on timescales of days. The amplitude of these changes, along with the spectrum at the faint state, suggest that the system is possibly a dwarf nova. The lack of any high-excitation He ii lines suggests that this system is not magnetically dominated. The light curve in both quiescence and outburst resembles that of Lanning 386, implying MASTER OTJ192328.22+612413.5 is a possible cross between a dwarf nova and a SW Sextantis star.

  3. Soil erosion processes and sediment fluxes in a Mediterranean landscape of marls, Campina de Cadiz, SW Spain

    International Nuclear Information System (INIS)

    Faust, D.; Schmidt, M.

    2009-01-01

    Marl landscapes, especially in the Mediterranean, show evident traces of high present-day and past soil erosion rates. The tendency to develop hill slope channels leads even at moderate rainstorm magnitudes to a significant increase of slope-to-slope connectivity, resulting in high amounts of mass transfer from upper parts of the hill slopes towards foot slopes and valley floors. To analyse the intensity of this transfer a study was conducted focussing on late Holocene sediments correlative to modern-time soil erosion in the marl landscape of SW Spain. Based of field observations and sediment analysis several landscape positions within a medium-scale catchment were explored. Depending on landscape constellation, the sediment characteristics reflect either hill slope processes or alluvial processes or an interchange of them. For a temporal context a method to trace young sediments by analysing nutrients originating from modern-time application of mineral fertiliser was applied. Results show high rates of sedimentation (>1 cm/year) for this young period in several profiles. By identifying the predominant geomorphic components and processes in the study area a conceptual model of the studied system was developed. (Author) 17 refs.

  4. The significance of nitrogen limited condition in the initiation of lipid biosynthesis in Aurantiochytrium sp. SW1

    Science.gov (United States)

    Haladu, Zangoma Maryam; Ibrahim, Izyanti; Hamid, Aidil Abdul

    2018-04-01

    The manner of the onset of lipid synthesis in Aurantiochytrium sp. SW1 as well as the possible role of NAD+ dependent isocitrate dehydrogenase (NAD+: ICDH) in the initiation of lipid biosynthesis were studied. The initiation of lipid synthesis in the microalgae was not associated with the cessation of growth, but commence at the early phase of growth. Substantial amount of lipid (30 %, g/g biomass) was accumulated during the active growth phase at 48 h with growth rate decreasing from 0.11 g/L/h during active growth to 0.02 g/L/h in the limited growth phase. At that period the activity of NAD+: ICDH was still detectable although it slightly decreased to 20 nmol/min/mg in 48 h from 25 nmol/min/mg at 24 h. Analysis of ammonium sulfate fractionated of NAD+: ICDH activity showed that NAD+: ICDH was not completely dependent on adenosine monophosphate (AMP) for its activity, although the presence of AMP increased the enzyme's affinity towards its substrate (isocitrate) indicated by the low Km value of the enzyme for isocitrate. While citrate acts as inhibitor of the enzyme only at high concentration. The probable implications of these properties to the regulation of lipid are discussed.

  5. Andromeda polifolia and Oxycoccus microcarpus as pollution indicators for ombrotrophic bogs in the Western Sudety Mountains (SW Poland).

    Science.gov (United States)

    Wojtuń, Bronisław; Samecka-Cymerman, Aleksandra; Kolon, Krzysztof; Klink, Agnieszka; Kempers, Alexander J

    2013-01-01

    Concentrations of the elements Cd, Cr, Cu, Fe, Li, Mn, N, Ni, Pb and Zn in Andromeda polifolia, Oxycoccus microcarpus and in the peat in which these plants grew were measured in the Western Sudety (Karkonosze and Izerskie Mts., SW Poland). Of both the investigated plant fruit, O. microcarpus harvested from wild populations are commonly used as medicines. Samples from ombrotrophic bogs were investigated within the area influenced by exhausts of the former Black Triangle, one of the most heavily industrialized and polluted areas in Europe. A. polifolia and O. microcarpus growing at the highest elevations contained the highest Cu, Li, Ni, Mn and Zn concentrations and in addition O. microcarpus also contained the highest Cr concentrations. Both the investigated species have wide circumpolar distribution in ombrotrophic mires of the Northern hemisphere. As this type of mires is nourished solely by atmospheric deposition, the increased metal concentrations in A. polifolia and O. microcarpus may be an indication that their habitats receive an atmospheric input of long-range transported pollution. Our investigation proves that both species are able to accumulate elevated metal levels and may be used in the bioindication of the metal status in ombrotrophic mires. Controlling the collection of O. microcarpus fruit for consumption and medicinal purposes is recommended as this species can accumulate increased metal levels. However, further more detailed studies are necessary to verify the inner translocation of metals into fruit.

  6. Alluvial plain dynamics and human occupation in SW Amazonia during the Holocene: A paleosol-based reconstruction

    Science.gov (United States)

    Lombardo, Umberto; Rodrigues, Leonor; Veit, Heinz

    2018-01-01

    The present study reconstructs Holocene fluvial dynamics in the southern Amazonian foreland basin through the analysis of 36 stratigraphic profiles taken along a 300 km long transect across the Llanos de Moxos (LM), in the Bolivian Amazon. Based on 50 radiocarbon ages from paleosols intercalated with fluvial sediments, the most important changes in floodplain dynamics on a millennial scale are reconstructed and the links between pre-Columbian cultural processes and environmental change in the region explored. Results show that the frequency of river avulsions and crevasses, as inferred from the number and age of the cored paleosols, is stable from 8k cal. yrs BP to 4k cal. yrs BP and increases significantly from 4k to 2k cal. yrs BP, following the strengthening of el Niño/la Niña cycle and an increase in average precipitation. Fluvial activity then decreases and reaches its minimum after 2k cal BP. A comparison between the stratigraphic record and the archaeological record shows a match between periods of landscape stability in SW Amazonia (low river activity) and periods of pre-Columbian human occupation. The first Amazonians lived in the LM until 4k yrs. BP, when an abrupt increase in the frequency of river avulsions and crevasses forced the abandonment of the region. After two thousand years of archaeological hiatus, which matches the period of highest river activity in the region, agriculturists reoccupied the Bolivian Amazon.

  7. Fitochemistry evaluation of leaves of Excoecaria lucida Sw. (Aité) (Euphorbiaceae) and isolation e identification of a hemiterpenoid

    International Nuclear Information System (INIS)

    Pacheco, Ania Ochoa; Arranz, Julio César Escalona; Fechine Tavares, Josean; Da Silva, Marcelo Sobra

    2015-01-01

    Introduction: excoecaria lucida Sw. (Aité), it is a species that grow in Cuba and at the Caribbean region. It has been scientifically quite a little studied, in spite of the fact that the population utilizes it due to their medicinal properties as antiasthmatic, antimicrobial, and for the toothache treatment. Objectives: to determine the chemical composition of leaves, as well as the isolation and identification of their secondary metabolites. Methods: dried and milled leaves were macerated 72 hours with ethanol 95 %, repeating the procedure in 4 occasions. Total extract was determined in his chemical qualitative composition and afterwards it was fragmented with solvents. The phase with greater yield was studied by High Performance Liquid Chromatography and isolated the main substance, which was characterized by infrared and Nuclear Magnetic Resonance spectroscopy: uni-dimensional 1H and 13C at 500 MHz and bi-dimensional HMQC, HMBC, COSY and NOESY. Results: the identification of Alkaloids, triterpenes and steroids, quinone, flavonoids, coumarins, sesqiterpenic lactones, tannins and phenols were accomplished. From the greater yield phase (butanol= 23.48 g) was isolated and identified the main compound, a hemiterpenoid. Conclusions: the identified secondary metabolites are in coincidence with other reports related to the genera. For first time the hemiterpene (2E)-2-methyl-2- buten-1,4-di-hydroxyl-1-O-β-D-glucopyranoside is informed in this genera and specie. (author)

  8. Paleomagnetic dating of non-sulfide Zn-Pb ores in SW Sardinia (Italy: a first attempt

    Directory of Open Access Journals (Sweden)

    L. Sagnotti

    2005-06-01

    Full Text Available A first paleomagnetic investigation aimed at constraining the age of the non-sulfide Zn-Pb ore deposits in the Iglesiente district (SW Sardinia, Italy was carried out. In these ores, the oxidation of primary sulfides, hosted in Cambrian carbonate rocks, was related to several paleoweathering episodes spanning from the Mesozoic onward. Paleomagnetic analyses were performed on 43 cores from 4 different localities, containing: a non-oxidized primary sulfides and host rock, b oxidized Fe-rich hydrothermal dolomites and (c supergene oxidation ore («Calamine». Reliable data were obtained from 18 samples; the others show uninterpretable results due to low magnetic intensity or to scattered demagnetization trajectories. Three of them show a scattered Characteristic Remanent Magnetization (ChRM, likely carried by the original (i.e. Paleozoic magnetic iron sulfides. The remaining 15 samples show a well defined and coherent ChRM, carried by high-coercivity minerals, acquired after the last phase of counterclockwise rotation of Sardinia (that is after 16 Myr, in a time interval long enough to span at least one reversal of the geomagnetic field. Hematite is the main magnetic carrier in the limestone, whereas weathered hydrothermal dolomite contains goethite or a mixture of both. The results suggest that paleomagnetism can be used to constrain the timing of oxidation in supergene-enriched ores.

  9. Groundwater chemistry characterization using multi-criteria approach: The upper Samalá River basin (SW Guatemala)

    Science.gov (United States)

    Bucci, Arianna; Franchino, Elisa; De Luca, Domenico Antonio; Lasagna, Manuela; Malandrino, Mery; Bianco Prevot, Alessandra; Hernández Sac, Humberto Osvaldo; Coyoy, Israel Macario; Sac Escobar, Edwin Osvaldo; Hernández, Ardany

    2017-10-01

    Improving understanding on groundwater chemistry is a key priority for water supply from groundwater resources, especially in developing countries. A hydrochemical study was performed in an area of SW Guatemala (Samalà River basin), where water supply to population is groundwater-based and no systematic studies on its groundwater resources have been performed so far. Traditional hydrochemical analyses on major ions and some trace elements metals coupled with chemometric approach were performed, including principal component analysis and hierarchical clustering analysis. Results evidence that chemical differentiation is linked to the spatial distribution of sampled waters. The most common hydrochemical facies, bicarbonate calcium and magnesium, is linked to infiltration of meteoric waters in recharge areas represented by highlands surrounding Xela caldera, a wide plateau where most of population is concentrated. This trend undergoes chemical evolution in proximity of active volcanic complexes in the southern area, with enrichment in sulphate, chloride and magnesium. Chemical evolution also occurs towards the centre of Xela caldera due to slow circulation in aquifer and consequent sodium enrichment due to ion exchange with the porous medium. Water quality did not reveal severe concerns, even though some sources of contamination could be identified; in particular, agriculture and urban wastewater could be responsible for observed threshold exceedances in nitrate and lead. This integrated multi-approach to hydrochemical data interpretation yielded to the achievement of important information that poses the basis for future groundwater protection in an area where main water features were almost unknown.

  10. Simulator with integrated HW and SW for prediction of thermal comfort to provide feedback to the climate control system

    Science.gov (United States)

    Pokorný, Jan; Kopečková, Barbora; Fišer, Jan; JÍcha, Miroslav

    2018-06-01

    The aim of the paper is to assemble a simulator for evaluation of thermal comfort in car cabins in order to give a feedback to the HVAC (heating, ventilation and air conditioning) system. The HW (hardware) part of simulator is formed by thermal manikin Newton and RH (relative humidity), velocity and temperature probes. The SW (software) part consists of the Thermal Comfort Analyser (using ISO 14505-2) and Virtual Testing Stand of Car Cabin defining the heat loads of car cabin. Simulator can provide recommendation for the climate control how to improve thermal comfort in cabin by distribution and directing of air flow, and also by amount of ventilation power to keep optimal temperature inside a cabin. The methods of evaluation of thermal comfort were verified by tests with 10 test subjects for summer (summer clothing, ambient air temperature 30 °C, HVAC setup: +24 °C auto) and winter conditions (winter clothing, ambient air temperature -5 °C, HVAC setup: +18 °C auto). The tests confirmed the validity of the thermal comfort evaluation using the thermal manikin and ISO 14505-2.

  11. Decreasing concentrations of metals in Sphagnum mosses in ombrotrophic mires of the Sudety mountains (SW Poland) since late 1980s.

    Science.gov (United States)

    Wojtuń, Bronisław; Samecka-Cymerman, Aleksandra; Kolon, Krzysztof; Kempers, Alexander J

    2013-06-01

    In this investigation we focus on the evaluation of changes in metal pollution between 1986 until 2011 by Sphagnum species as bioindicators in 100 km part of the Sudety mountains influenced by the former Black Triangle Region. Concentrations of Cd, Co, Cr, Cu, Fe, Mn, Ni, Pb and Zn were measured in various Sphagnum species all from ombrotrophic bogs in the Sudety mountains (SW Poland). The tested hypothesis was that overall improvements in pollution control in the former Black Triangle Region between 1986 until recent reduced the amount of metals deposited and accumulated by these plants. Concentrations of Cd, Cr, Cu, Fe, Pb and Zn in Sphagnum species were very high in 1986 indicating a heavy pollution of the examined bogs in this period, and significantly higher than in samples collected in 2011. The PCCA ordination showed the similar pattern in all bogs. In 2011 concentration of the Co was significantly higher in hollow species and concentration of Mn was significantly higher in those from hummocks. Differences between hollow/hummock sites were more important than species-specific abilities of Sphagnum mosses to accumulate metals. Species from hollows were better bioindicators of Co and those from hummocks were better bioindicators of Mn pollution. Copyright © 2012 Elsevier Ltd. All rights reserved.

  12. Simulator with integrated HW and SW for prediction of thermal comfort to provide feedback to the climate control system

    Directory of Open Access Journals (Sweden)

    Pokorný Jan

    2018-01-01

    Full Text Available The aim of the paper is to assemble a simulator for evaluation of thermal comfort in car cabins in order to give a feedback to the HVAC (heating, ventilation and air conditioning system. The HW (hardware part of simulator is formed by thermal manikin Newton and RH (relative humidity, velocity and temperature probes. The SW (software part consists of the Thermal Comfort Analyser (using ISO 14505-2 and Virtual Testing Stand of Car Cabin defining the heat loads of car cabin. Simulator can provide recommendation for the climate control how to improve thermal comfort in cabin by distribution and directing of air flow, and also by amount of ventilation power to keep optimal temperature inside a cabin. The methods of evaluation of thermal comfort were verified by tests with 10 test subjects for summer (summer clothing, ambient air temperature 30 °C, HVAC setup: +24 °C auto and winter conditions (winter clothing, ambient air temperature -5 °C, HVAC setup: +18 °C auto. The tests confirmed the validity of the thermal comfort evaluation using the thermal manikin and ISO 14505-2.

  13. Trace element accumulation in woody plants of the Guadiamar Valley, SW Spain: A large-scale phytomanagement case study

    International Nuclear Information System (INIS)

    Dominguez, Maria T.; Maranon, Teodoro; Murillo, Jose M.; Schulin, Rainer; Robinson, Brett H.

    2008-01-01

    Phytomanagement employs vegetation and soil amendments to reduce the environmental risk posed by contaminated sites. We investigated the distribution of trace elements in soils and woody plants from a large phytomanaged site, the Guadiamar Valley (SW Spain), 7 years after a mine spill, which contaminated the area in 1998. At spill-affected sites, topsoils (0-25 cm) had elevated concentrations of As (129 mg kg -1 ), Bi (1.64 mg kg -1 ), Cd (1.44 mg kg -1 ), Cu (115 mg kg -1 ), Pb (210 mg kg -1 ), Sb (13.8 mg kg -1 ), Tl (1.17 mg kg -1 ) and Zn (457 mg kg -1 ). Trace element concentrations in the studied species were, on average, within the normal ranges for higher plants. An exception was white poplar (Populus alba), which accumulated Cd and Zn in leaves up to 3 and 410 mg kg -1 respectively. We discuss the results with regard to the phytomanagement of trace element contaminated sites. - There is a low trace element transfer from contaminated soils to the aboveground parts of afforested woody plants under a semi-arid climate

  14. Sediment Sources and Transport Pathway Identification Based on Grain-Size Distributions on the SW Coast of Portugal

    Directory of Open Access Journals (Sweden)

    Xiaoqin Du

    2015-01-01

    Full Text Available Espichel-Sines is an embayed coast in SW Portugal, consisting of two capes at both extremities, a tidal inlet and associated ebb tidal delta, a barrier spit, sandy beaches, sea cliffs, and a submarine canyon. Beach berm, backshore, near shore and inner shelf sediment samples were taken. Samples were analyzed for their grain-size compositions. This study ranks the hypothetical sediment sources influences on the sediment distributions in the study area using the multivariate Empirical Orthogonal Function (EOF techniques. Transport pathways in this study were independently identified using the grain size trend analysis (GSTA technique to verify the EOF findings. The results show that the cliff-erosion sediment is composed of pebbles and sand and is the most important sediment source for the entire embayment. The sediment at the inlet mouth is a mixture of pebbles, sand, silt, and clay, which is a minor sediment source that only has local influence. The overall grain-size distributions on the shelf are dominated by the sand except for the high mud content around the tidal delta front in the northern embayment. Sediment transport patterns on the inner shelf at the landward and north sides of the canyon head are landward and northward along the barrier spit, respectively. On the south side of the canyon head, the prevailing sediment transport is seaward. Sediment transport occurs in both directions along the shore.

  15. Total Mercury in Squalid Callista Megapitaria squalida from the SW Gulf of California, Mexico: Tissue Distribution and Human Health Risk.

    Science.gov (United States)

    Romo-Piñera, Abril K; Escobar-Sánchez, Ofelia; Ruelas-Inzunza, Jorge; Frías-Espericueta, Martín G

    2018-03-01

    We evaluated the total Hg concentration in different tissues of squalid callista Megapitaria squalida in order to measure Hg distribution in tissue and to estimate human health risk. Samples were obtained by free diving in the SW Gulf of California, Mexico. Concentrations are given on a wet weight basis. A total of 89 squalid callista specimens were obtained, presenting an average Hg concentration of 0.07 ± 0.04 µg g -1 . There were no significant differences (p > 0.05) in Hg concentration between tissues (visceral mass = 0.09 ± 0.08 µg g -1 ; mantle = 0.06 ± 0.07 µg g -1 ; muscle = 0.06 ± 0.04 µg g -1 ). The low Hg values found in squalid callista and its low risk quotient (HQ = 0.03) suggest that the consumption of squalid callista does not represent a human health risk. However, HQ calculated using MeHg was > 1, it which could indicate a potential risk related to consumption of clams.

  16. Spatio-temporal distribution of the dominant Diatom and Dinoflagellate species in the Bay of Tunis (SW Mediterranean Sea

    Directory of Open Access Journals (Sweden)

    O. DALY YAHIA-KEFI

    2005-06-01

    Full Text Available Microphytoplankton composition and its relationships with hydrology and nutrient distributions were investigated over 24 months (December 1993 - November 1995 in the Bay of Tunis ( SW Mediterranean Sea. A new index, the ‘Specific Preference Index’ (SPI obtained by computing the median value of each parameter weighed by the numerical value of each species density was developed. Using this index, the relationships between each species and temperature, salinity and major nutrients were analysed. The distribution of chlorophyll a did not show a clear correlation with microplankton abundance suggesting that other factors contribute to chlorophyll concentration, such as smaller phytoplankton size fractions or detritus. The winter-spring diatom blooms did not show a regular pattern during both years. High nutrient inputs in late summer, associated with mild meteorological conditions, contributed to the development of a large diatom bloom in autumn 1995 where significant silicate depletion was witnessed. Generally, diatoms were more stenotherm than dinoflagellates in the Bay, whereas dinoflagellates were more stenohaline than diatoms. The statistical analyses showed that the two species, Bellerochea horologicalis , and Lithodesmioides polymorpha, var., tunisiense, appeared in a wide range of environmental conditions. An excess of phosphateversus nitrate appeared to be associated with red tides of, Gymnodinium spp, whereas Peridinium quinquecorne, showed the opposite. Phosphate concentrations appear to be crucial in this coastal environment, where diatom blooms are often limited by low silicate availability.

  17. An alternative radiometric method for calculating the sedimentation rates: Application to an intertidal region (SW of Spain)

    Energy Technology Data Exchange (ETDEWEB)

    Ligero, R.A., E-mail: rufino.ligero@uca.e [Departamento de Fisica Aplicada, Universidad de Cadiz, 11510 Puerto Real, Cadiz (Spain); Casas-Ruiz, M. [Departamento de Fisica Aplicada, Universidad de Cadiz, 11510 Puerto Real, Cadiz (Spain); Barrera, M. [Departamento de Medio Ambiente, CIEMAT, Madrid 28040 (Spain); Barbero, L. [Departamento de Ciencias de la Tierra, Universidad de Cadiz, 11510 Puerto Real (Spain); Melendez, M.J. [Departamento de Fisica Aplicada, Universidad de Cadiz, 11510 Puerto Real, Cadiz (Spain)

    2010-09-15

    A new method using the inventory determined for the activity of the radionuclide {sup 137}Cs, coming from global radioactive fallout has been utilised to calculate the sedimentation rates. The method has been applied in a wide intertidal region in the Bay of Cadiz Natural Park (SW Spain). The sedimentation rates estimated by the {sup 137}Cs inventory method ranged from 0.26 cm/year to 1.72 cm/year. The average value of the sedimentation rate obtained is 0.59 cm/year, and this rate has been compared with those resulting from the application of the {sup 210}Pb dating technique. A good agreement between the two procedures has been found. From the study carried out, it has been possible for the first time, to draw a map of sedimentation rates for this zone where numerous physico-chemical, oceanographic and ecological studies converge, since it is situated in a region of great environmental interest. This area, which is representative of common environmental coastal scenarios, is particularly sensitive to perturbations related to climate change, and the results of the study will allow to make short and medium term evaluations of this change.

  18. Expression of CAR in SW480 and HepG2 cells during G1 is associated with cell proliferation

    International Nuclear Information System (INIS)

    Osabe, Makoto; Sugatani, Junko; Takemura, Akiko; Yamazaki, Yasuhiro; Ikari, Akira; Kitamura, Naomi; Negishi, Masahiko; Miwa, Masao

    2008-01-01

    Constitutive androstane receptor (CAR) is a transcription factor to regulate the expression of several genes related to drug-metabolism. Here, we demonstrate that CAR protein accumulates during G1 in human SW480 and HepG2 cells. After the G1/S phase transition, CAR protein levels decreased, and CAR was hardly detected in cells by the late M phase. CAR expression in both cell lines was suppressed by RNA interference-mediated suppression of CDK4. Depletion of CAR by RNA interference in both cells and by hepatocyte growth factor treatment in HepG2 cells resulted in decreased MDM2 expression that led to p21 upregulation and repression of HepG2 cell growth. Thus, our results demonstrate that CAR expression is an early G1 event regulated by CDK4 that contributes to MDM2 expression; these findings suggest that CAR may influence the expression of genes involved in not only the metabolism of endogenous and exogenous substances but also in the cell proliferation

  19. Ichthyoplankton spatial pattern in the inner shelf off Bahía Blanca Estuary, SW Atlantic Ocean

    Science.gov (United States)

    Hoffmeyer, Mónica Susana; Clara, Menéndez María; Florencia, Biancalana; Mabel, Nizovoy Alicia; Ramón, Torres Eduardo

    2009-09-01

    This study focuses on the composition, abundance and distribution of ichthyoplankton in the inner shelf area off Bahía Blanca Estuary on the SW Atlantic Ocean during late spring. Eggs and larvae of Brevoortia aurea, Engraulis anchoita, Parona signata, Sciaenidae spp. - such as Cynoscion guatucupa and Micropogonias furnieri -, and Odontesthes argentinensis were found. Species richness was low probably as a result of season and shallow depths. Ichthyoplankton abundance reached values close to 10 000 per 10 m -3 (eggs) and 4000 per 10 m -3 (larvae) and displayed a spatial distribution pattern with maximum abundance values restricted to a band parallel to the coast. Differences between egg and larval patterns, probably derived from a different displacement and hydrodynamic behavior, were observed. Egg and larvae distribution patterns were found related with spawning areas and to directly depend on salinity and mesozooplankton. The larvae distribution pattern, in particular, was found to inversely depend on particulate organic carbon. In addition, the geographic location of egg and larvae maxima strongly coincided with a saline front reported for this area in springtime, thus suggesting a direct relationship with it.

  20. Antifungal activities of the essential oil and its fractions rich in sesquiterpenes from leaves of Casearia sylvestris Sw.

    Science.gov (United States)

    Pereira, Flaviane G; Marquete, Ronaldo; Domingos, Levy T; Rocha, Marco E N; Ferreira-Pereira, Antonio; Mansur, Elisabeth; Moreira, Davyson L

    2017-01-01

    Casearia genus (Salicaceae) is found in sub-tropical and tropical regions of the world and comprises about 160-200 species. It is a medicinal plant used in South America, also known as "guaçatonga", "erva-de-tiú", "cafezinho-do-mato". In Brazil, there are about 48 species and 12 are registered in the State of Rio de Janeiro, including Casearia sylvestris Sw. There are many studies related to the chemical profile and cytotoxic activities of extracts from these plants, although few studies about the antifungal potential of the essential oil have been reported. In this work, we have studied the antifungal properties of the essential oil of C. sylvestris leaves, as well as of their fractions, against four yeasts (Saccharomyces cerevisae, Candida albicans, C. glabrata and C. krusei) for the first time. The chemical analysis of the essential oil revealed a very diversified (n = 21 compounds) volatile fraction composed mainly of non-oxygenated sesquiterpenes (72.1%). These sesquiterpenes included α-humulene (17.8%) and α-copaene (8.5%) and the oxygenated sesquiterpene spathulenol (11.8%) were also identified. Monoterpenes were not identified. The fractions are mainly composed of oxygenated sesquiterpenes, and the most active fraction is rich in the sesquiterpene 14-hydroxy -9-epi-β-caryophyllene. This fraction was the most effective in inhibiting the growth of three yeast strains.

  1. Modern Sedimentation off the Kaoping River, SW Taiwan: A Comparison with Eel River's S2S System

    Science.gov (United States)

    Huh, C.; Lin, H.; Lin, S.

    2006-12-01

    The Kaoping (KP) River in SW Taiwan has a watershed area of 3257 km2 and an annual sediment discharge of 49 MT. Although the sediment yield of the KP River basin (1.5×104 ton km-2 yr^{- 1}) is the 4th highest among Taiwan's catchment basins, it is nearly one order of magnitude higher than that of the Eel River's basin (~1.8×103 ton km-2 yr-1; the highest in the U.S.). The KP canyon extends almost immediately seaward from the river's mouth and terminates in the northwestern corner of the South China Sea. The head of the canyon is characterized by high and steep walls exceeding 600 m. The KP river's source-to-sink system offers a dramatic case of mountainous rivers at active margins for S2S study. Here we report some results about modern sedimentation in KP river's dispersal system. Seventy-six sediment cores collected from an area of ~3000 km2 were analyzed for fallout nuclides 7Be, 137Cs and 210Pb by gamma spectrometry. From profiles of excess 210Pb and 137Cs sediment accumulation rates in the coring sites were estimated, which vary from 0.06 to 1.6 cm/yr, with the highest rates (>1 cm/yr) distributed in the upper slope (exported out of the study area via the KP canyon to the deep sea by gravity-driven turbidity or hyperpycnal flows.

  2. Increased cell motility and invasion upon knockdown of lipolysis stimulated lipoprotein receptor (LSR in SW780 bladder cancer cells

    Directory of Open Access Journals (Sweden)

    Ørntoft Torben F

    2008-07-01

    Full Text Available Abstract Background Mechanisms underlying the malignant development in bladder cancer are still not well understood. Lipolysis stimulated lipoprotein receptor (LSR has previously been found to be upregulated by P53. Furthermore, we have previously found LSR to be differentially expressed in bladder cancer. Here we investigated the role of LSR in bladder cancer. Methods A time course siRNA knock down experiment was performed to investigate the functional role of LSR in SW780 bladder cancer cells. Since LSR was previously shown to be regulated by P53, siRNA against TP53 was included in the experimental setup. We used Affymetrix GeneChips for measuring gene expression changes and we used Ingenuity Pathway Analysis to investigate the relationship among differentially expressed genes upon siRNA knockdown. Results By Ingenuity Pathway analysis of the microarray data from the different timepoints we identified six gene networks containing genes mainly related to the functional categories "cancer", "cell death", and "cellular movement". We determined that genes annotated to the functional category "cellular movement" including "invasion" and "cell motility" were highly significantly overrepresented. A matrigel assay showed that 24 h after transfection the invasion capacity was significantly increased 3-fold (p Conclusion We conclude that LSR may impair bladder cancer cells from gaining invasive properties.

  3. Survey of compressions in the SW (1 AU), and after termination shock at Voyager (in sheath & LISM)

    Science.gov (United States)

    Berdichevsky, D. B.

    2017-12-01

    Examples of the plasma compression as it is observed in the solar wind at 1 AU with the suite of instruments in the SC Wind, and after the termination shock with both Voyager SC, as well as with Voyager 1 in the local interstellar medium (LISM) are presented. The work will focus on similarities and differences in the observations at the different locations. At priory is fair to mention that the 4 regions differ in several aspects. At 1 AU the solar wind (SW) flow is mostly alfvenic. In the sheath after the termination shock the possibly subsonic solar wind is mostly compressional but fluctuation modes in scales of one hour are much less observed at Voyager 1 than at Voyager 2 path. Finally Burlaga and Ness1 documented the nature of the compressional flow in the `depletion' layer at the start of the LISM as well later in this medium, showing the low plasma-beta character of this LISM region in Voyager 1 path. 1Burlaga L.F., and N. Ness, ApJ, 784, 146 (14pp), 2014.

  4. THE NEW ECLIPSING CV MASTER OTJ192328.22+612413.5—A POSSIBLE SW SEXTANTIS STAR

    Energy Technology Data Exchange (ETDEWEB)

    Kennedy, M. R.; Callanan, P.; Bouanane, S. [Department of Physics, University College Cork, Cork (Ireland); Garnavich, P. M.; Rose, B. M. [Department of Physics, University of Notre Dame, Notre Dame, IN 46556 (United States); Szkody, P. [Department of Astronomy, University of Washington, Seattle, WA (United States); Bendjoya, P.; Abe, L.; Rivet, J. P.; Suarez, O., E-mail: markkennedy@umail.ucc.ie [Laboratoire Lagrange UMR 7293, Université de Nice Sophia-Antipolis, Observatoire de la Côte d’Azur (France)

    2016-07-01

    We present optical photometry and spectroscopy of the new eclipsing cataclysmic variable MASTER OTJ192328.22+612413.5, discovered by the MASTER team. We find the orbital period to be P = 0.16764612(5) day/4.023507(1) hr. The depth of the eclipse (2.9 ± 0.1 mag) suggests that the system is nearly edge on, and modeling of the system confirms the inclination to be between 81.°3 and 83.°6. The brightness outside the eclipse varies between observations, with a change of 1.6 ± 0.1 mag. Spectroscopy reveals double-peaked Balmer emission lines. By using spectral features matching a late M-type companion, we bound the distance to be 750 ± 250 pc, depending on the companion’s spectral type. The source displays 2 mag brightness changes on timescales of days. The amplitude of these changes, along with the spectrum at the faint state, suggest that the system is possibly a dwarf nova. The lack of any high-excitation He ii lines suggests that this system is not magnetically dominated. The light curve in both quiescence and outburst resembles that of Lanning 386, implying MASTER OTJ192328.22+612413.5 is a possible cross between a dwarf nova and a SW Sextantis star.

  5. Applicability of TOPMODEL in the mountainous catchments in the upper Nysa Kłodzka river basin (SW Poland)

    Science.gov (United States)

    Jeziorska, Justyna; Niedzielski, Tomasz

    2018-03-01

    River basins located in the Central Sudetes (SW Poland) demonstrate a high vulnerability to flooding. Four mountainous basins and the corresponding outlets have been chosen for modeling the streamflow dynamics using TOPMODEL, a physically based semi-distributed topohydrological model. The model has been calibrated using the Monte Carlo approach—with discharge, rainfall, and evapotranspiration data used to estimate the parameters. The overall performance of the model was judged by interpreting the efficiency measures. TOPMODEL was able to reproduce the main pattern of the hydrograph with acceptable accuracy for two of the investigated catchments. However, it failed to simulate the hydrological response in the remaining two catchments. The best performing data set obtained Nash-Sutcliffe efficiency of 0.78. This data set was chosen to conduct a detailed analysis aiming to estimate the optimal timespan of input data for which TOPMODEL performs best. The best fit was attained for the half-year time span. The model was validated and found to reveal good skills.

  6. Geochronology of granitic magmatism from Caraculo-Bibala region (SW Angola) and its correlation with Ribeira fold belt (SE Brazil)

    International Nuclear Information System (INIS)

    Carvalho, Heitor de; Tassinari, Colombo C.G.

    1992-01-01

    Rb-Sr whole-rock analyses of representative granitic rocks from the Bibala-Caraculo region, southwestern Angola, are used to determine the age and evolution of the acid plutonic events in this segment of the Angolan continental crust. The granitoids present a wide range of lithological types and compositions. Three time-intervals have been defined for the magmatism: 1,950 - 1,900 Ma; 1,750 - 1,700 Ma; 1,550 - 1,500 Ma. The oldest, though not very well defined, was obtained for the Chicalengue granitoid, the second one represents the Serra dos Gandarengos and Chonga granitoids and Luchipa-Pungue Granitic Complex and the youngest one comprises the Chicate and Caraculo granitic bodies and Numhino Granitic Complex. The initial 87 Sr/ 86 Sr ratios show characteristic values for each time-interval, as follows; 1,950 -1,900 Ma = 0,7015; 1,750 - 1,700 Ma = 0,7060 to 0,7075; 1,550 - 1,500 Ma 0,7048 - 0,7057, suggesting different sources for the granitoids within each geological period. In addition are presented two K-Ar ages for the basic rocks in SW Angola, with values of 1700 and 600 Ma, which represent a minimum ages for these rocks and are probably related to the Damara Orogeny. (author). 24 refs., 11 figs., 2 tabs

  7. Cryopreservation of chayote (Sechium edule JACQ. SW.) zygotic embryos and shoot-tips from in vitro plantlets.

    Science.gov (United States)

    Abdelnour-Esquivel, Ana; Engelmann, Florent

    2002-01-01

    This paper presents the development of cryopreservation protocols for zygotic embryos and apices of chayote (Sechium edule Jacq. Sw.), a tropical plant species with recalcitrant seeds. Zygotic embryos of two cultivars, Ccocro negro (CN) and Claudio (Cl) could withstand cryopreservation, with survival percentages of 10 and 30 %, after desiccation to 23 and 19 % moisture content (fresh weight basis), respectively. Apices sampled on in vitro plantlets of cultivars Cl, 13 and JM were successfully cryopreserved using a vitrification technique. Optimal conditions included the culture of mother-plants for 22 days on medium containing 0.3 M sucrose, culture of excised apices on the same medium for 1 day, loading of apices for 20 min with 2M glycerol + 0.4M glycerol, treatment with a series of diluted PVS2 solution (60 % PVS2 followed by 80 % PVS2 solution for 15 min (cultivar Cocoro Blanco [CB]) or 30 min (cultivars CN and Cl) at each concentration), rapid freezing and thawing, washing of shoot-tips with a 1.2 M sucrose solution, followed by recovery on media with progressively decreasing sucrose concentrations until the standard concentration of 0.1 M was reached. The highest survival percentages achieved ranged between 17 and 38 %, depending on the cultivar.

  8. Effects of IAA and IBA on the in vitro rooting of stem cuttings of Sechium edule (Jacq. Sw

    Directory of Open Access Journals (Sweden)

    José García García

    2015-01-01

    Full Text Available This investigation was carried out with the objective of evaluating the response of shoots of chayote [S. edule (Jacq. Sw.] to the application of indole-3-butyric acid (IBA and indole-3-acetic acid (IAA on the in vitro rooting phase. The effect of three culture media, modified from the proposed of Murashige and Skoog (MS was studied: 1- 65% MS salt base, 2- 65% MS salt base + 0.05 mg l-1 of indolebutyric acid (AIB and 3- 65% MS salt base + 3.0 mg l-1-3-indole acetic acid (IAA. The variables evaluated were: number of roots, length and number of shoots per in vitro seedling. The best result were obtained when using 65% MS salt base with 3.0 mg l-1 of IAA. Significant differences (P<0.05 among treatments containing growth regulators was obtained for the variables number of roots and length of in vitro plantlets. In the UNA-730 accession root induction was obtained in a 65% MS salt base culture medium without growth regulators; however, when IAA and IBA was added the induction was 100%. The differences identified in this work with regards to the root induction were probably the combined result of genotype and specific culture conditions. Key words: auxins, chayote, growth regulators, in vitro culture

  9. Submillimeter and far-infrared line observations of M17 SW - A clumpy molecular cloud penetrated by ultraviolet radiation

    Science.gov (United States)

    Stutzki, J.; Genzel, R.; Harris, A. I.; Stacey, G. J.; Jaffe, D. T.

    1988-01-01

    Millimeter, submillimeter, and far-IR spectroscopic observations of the M17 SW star formation region are reported. Strong forbidden C II 158 micron and CO J = 7 - 6 line emission arises in an H II region/molecular cloud interface of several pc thickness. Weaker forbidden C II emission appears to be extended over 15 pc throughout the molecular cloud. CO J = 14 - 13 and forbidden O I 145 micron spectra indicate high temperatures and densities for both molecular and atomic gas in the interface. The results require the molecular cloud near the interface to be clumpy or filamentary. The extended forbidden C II emission throughout the molecular cloud has a level around 20 times higher than expected from a single molecular cloud interface exposed to an ultraviolet radiation field typical of the solar neighborhood. The high gas temperature of molecular material in the UV-illuminated interface region suggests that CO self-shielding and heating of CO by photoelectrons are important.

  10. Deep-sea dives reveal an unexpected hexactinellid sponge garden on the Rio Grande Rise (SW Atlantic). A mimicking habitat?

    Science.gov (United States)

    Hajdu, Eduardo; Castello-Branco, Cristiana; Lopes, Daniela A.; Sumida, Paulo Yukio Gomes; Perez, Jose Angel Alvarez

    2017-12-01

    Long overlooked, sponge grounds are now recognised as important habitats which support high biodiversity. Some of these deep-sea sponge aggregations are formed by hexactinellids, in varying densities, which can occur on both soft and hard substrates. Despite their ecological importance as habitat framework building taxa, hexactinellids have been little studied and only 33 species in this Class were reported from the entire South Atlantic until now. Most of this knowledge was gained from studies conducted on the eastern South America continental slope. Here we report a new hexactinellid sponge garden found by the Shinkai 6500 manned submersible on the Rio Grande Rise, a prominent topographic feature of the deep SW Atlantic. This is the first sponge garden worldwide found to be dominated by the stiff, often dichotomously branching, Sarostegia oculata which may occur in densities of over 5 individuals per square meter. This sponge, of uncertain familial allocation, seems to always carry epibiotic zoanthids, thus mimicking the 3D skeletal framework of actual coral gardens

  11. Estudio comparativo de los planes de actuación frente al riesgo volcánico (Chile, Costa Rica, El Salvador, Ecuador, España, México y Nicaragua)

    OpenAIRE

    Ona Corominas; Joan Martí

    2015-01-01

    El presente estudio hace una comparativa de actuación frente el riesgo volcánico entre varios países con la intención que sea una muestra de América Latina y España. El objetivo es comprobar si el nivel socioeconómico de un país se corresponde con la eficacia de los sistemas de prevención del riesgo volcánico que utilizan, analizar los motivos y los métodos en la medida de lo posible y aprender de los sistemas de trabajo para hacer frente a este riesgo, los cuales probablemente podrían ser ap...

  12. Características energéticas de una placa fotovoltaica, por variación de ángulo de inclinación, frente a la radiación solar en Ecuador.

    Directory of Open Access Journals (Sweden)

    Germán Alfredo Mora Trujillo

    2015-11-01

    Igualmente se implementara un sistema de control de la producción diaria de energía (Kw/h y el ahorro de emisiones de CO2 a la atmósfera, con el fin de hacer las comparaciones del uso de energía renovable frente a la convencional, lo que permitirá estimar el beneficio económico y ambiental. Esta investigación, permitirá registrar información precisa para diseñar instalaciones solares fotovoltaicas teniendo en cuenta la incidencia de la radiación solar en una placa fotovoltaica por variación de ángulo de inclinación frente al sol y determinar el ahorro de emisiones de CO2 a la atmósfera.

  13. SOCIALIZACIÓN DE INFORMACIÓN Y MOVILIZACIÓN DE LAS VÍCTIMAS. ESTRATEGIAS REGIONALES DE DEFENSA DE LOS DERECHOS HUMANOS FRENTE A LA VIOLENCIA EN MÉXICO

    Directory of Open Access Journals (Sweden)

    Jairo Antonio López

    2017-01-01

    Full Text Available El principal cuerpo de literatura que estudia la acción colectiva de las organizaciones no gubernamentales de derechos humanos pone un énfasis especial en las grandes organizaciones internacionales y las organizaciones ubicadas en las capitales de los Estados. Cuestionando este énfasis, en el presente artículo analizamos la movilización en defensa de los derechos humanos de las organizaciones locales frente a la violencia en México. Planteamos que estos actores colectivos impulsaron la socialización de información confiable sobre la crisis de derechos humanos y un trabajo directo de movilización con las víctimas y sus familiares, como nuevas estrategias de demanda frente a la violencia desatada tras las políticas de militarización. A partir de entrevistas a líderes de organizaciones, el análisis cronológico de prensa y de documentos oficiales de las organizaciones, identificamos que estas estrategias se evidencian en la creación de redes y acompañamiento regional, el posicionamiento de las agendas locales ante el Sistema Interamericano de Derechos Humanos y la emergente coordinación frente a la crisis de desaparición forzada. La movilización de organizaciones locales y de las víctimas ha sido soporte de las críticas que se han desatado frente al gobierno federal a nivel nacional e internacional luego de la desaparición de los 43 normalistas de Ayotzinapa, generando un claro episodio de presión y reconocimiento de la crisis de derechos humanos que vive México.

  14. Crystallization and preliminary crystallographic studies of FoxE from Rhodobacter ferrooxidans SW2, an FeII oxidoreductase involved in photoferrotrophy

    International Nuclear Information System (INIS)

    Pereira, L.; Saraiva, I. H.; Coelho, R.; Newman, D. K.; Louro, R. O.; Frazão, C.

    2012-01-01

    Crystals of the R. ferrooxidans SW2 iron oxidoreductase FoxE were obtained and the phase problem was solved by Fe SAD at 2.44 Å resolution. FoxE is a protein encoded by the foxEYZ operon of Rhodobacter ferrooxidans SW2 that is involved in Fe II -based anoxygenic photosynthesis (‘photoferrotrophy’). It is thought to reside in the periplasm, where it stimulates light-dependent Fe II oxidation. It contains 259 residues, including two haem c-binding motifs. As no three-dimensional model is available and there is no structure with a similar sequence, crystals of FoxE were produced. They diffracted to 2.44 Å resolution using synchrotron radiation at the Fe edge. The phase problem was solved by SAD using SHELXC/D/E and the experimental maps confirmed the presence of two haems per molecule

  15. El Frente Estudiantil Nacional (FEN: juventud y estudiantado en el proceso contestatario de los años sesenta en Argentina

    Directory of Open Access Journals (Sweden)

    Alejandra Reta

    2009-12-01

    Full Text Available Este artículo forma parte de un proyecto más amplio que aborda el proceso de acercamiento al Peronismo por parte de un sector del movimiento estudiantil en Argentina durante los años sesentas, tomando el caso particular del Frente Estudiantil Nacional (FEN. El FEN fue una organización universitaria “de pasaje al peronismo”, que buscaba inserción “legítima” en el mismo, vinculándose a sectores del peronismo histórico y al trabajo barrial.Proponemos privilegiar el análisis de documentos, aunque incluimos también algunos testimonios que nos sirven de apoyo. A partir de allí pretendemos explorar algunos “componentes contestatarios”, ligados al clima de ideas de la época, y visualizar cómo este actor colectivo se posiciona dentro de las categorías de “juventud” y del “estudiantado”, que aparecen en el discurso, considerando que el FEN reivindicó constantemente su carácter de tendencia estudiantil universitaria y su militancia juvenil.

  16. La protección y promoción de los derechos humanos frente a violaciones no estatales por los órganos internacionales

    Directory of Open Access Journals (Sweden)

    Nicolás Carrillo Santarelli

    2013-12-01

    Full Text Available La protección de la dignidad humana y el principio imperativo de igualdad, dos de los más importantes fundamentos y principios de los derechos humanos, exigen que los individuos sean protegidos frente a agresiones no estatales, dada la capacidad de que ellas afecten el goce y ejercicio de los derechos humanos. Esto explica y justifica la existencia de obligaciones positivas de protección y prevención de las autoridades, pero a su vez exige mecanismos de protección adicionales. En relación con algunos de ellos, es posible mencionar que la práctica internacional demuestra que órganos y agentes internacionales de promoción y protección de derechos humanos han tenido iniciativas como la publicación de violaciones o el contacto con actores no estatales para perseguir la efectividad de la protección integral de la dignidad humana. Sin embargo, estas acciones e iniciativas son con frecuencia limitadas, lo que exige tanto reconocer que existen competencias implícitas e inherentes para brindar una mayor protección como la necesidad de introducir cambios competenciales de lege ferenda.

  17. El espíritu científico frente al desafío sensacionalista. Guía para periodistas

    Directory of Open Access Journals (Sweden)

    Dr. Raymond Colle

    2001-01-01

    Full Text Available Frente a un aparente auge de la manipulación sensaciona1ista de la información en algunos medios de comunicación, nos parece justa la actitud de un vasto público que denuncia este hecho y protesta por él. Pero al mismo tiempo, mezclada con esta actitud vá1ida y necesaria, se está desarrollando otra que, al contrario, nos parece más bien perjudicial. La crítica, en efecto, se extiende en algunos casos a la desautorización o ridiculización de los testigos o de los investigadores e informadores de fenómenos poco comunes o aún inexplicados. En este caso, se está incurriendo en un doble error censurado por la ética: falta de respeto a las personas (testigos, investigadores y falta de respeto a la verdad, al no investigar los hechos antes de emitir el juicio. Esta situación hace urgente, a nuestro entender, una puntualización acerca de la actitud que todo analista objetivo y serio debería asumir: la actitud científica. Trataremos de mostrar como ha de aplicarse dicha actitud en el caso especifico de los "Objetos Voladores No Identificados" u "OVNIs", que ocupa cada vez más la atención de los periodistas en la actualidad.

  18. Contratación indefinida y segregación ocupacional según nacionalidad: Andalucía frente al resto de España

    Directory of Open Access Journals (Sweden)

    Antonio Caparrós Ruiz

    2009-06-01

    Full Text Available Como resultado de las reformas laborales realizadas en España desde 1997, el conjunto de relaciones laborales indefinidas se puede fragmentar en tres grandes grupos: contratos indefinidos ordinarios, indefinidos bonificados procedentes de la transformación de contratos temporales e indefinidos iniciales bonificados. Los objetivos principales de este trabajo son, por un lado, analizar la incidencia relativa de los diversos tipos de contratación indefinida frente al empleo temporal tanto para la población inmigrante como para la nacional. Por otro lado, para arrojar evidencia adicional sobre la calidad de los empleos que ocupan respectivamente extranjeros y españoles, se contrasta para ambos grupos la existencia de segregación ocupacional. Para el primer fin, la metodología utilizada consiste en la estimación de modelos logit multinomial donde la variable dependiente muestra el tipo de contrato del trabajador. Con respecto al segundo, se obtienen índices de segregación ocupacional considerando también la modalidad contractual. Estos análisis se realizan separadamente para Andalucía y para el resto de España, distinguiendo a los trabajadores según su experiencia laboral con objeto de valorar el proceso de asimilación de la población inmigrante hacia la nativa. La información estadística utilizada para efectuar este trabajo proviene de la Muestra Continua de Vidas Laborales (MTAS, 2006.

  19. Conductas frente al viraje de la prueba de tuberculina en estudiantes de medicina de una universidad de Lima, Perú

    Directory of Open Access Journals (Sweden)

    Lesly Calixto-Aguilar

    Full Text Available El objetivo del estudio fue determinar las conductas frente al viraje de la prueba de tuberculina (PPD y las razones del inicio o no del tratamiento de la infección latente tuberculosa (TILT en estudiantes de Medicina en una Universidad de Lima, Perú; 548 participantes llenaron un cuestionario; se obtuvo que 6,7% fueron positivos al ingreso a la universidad y 11,1% fueron conversores recientes; de este grupo 55,7 % no iniciaron TILT y la principal razón fue "no hubo explicación". De los conversores recientes, la mayoría de alumnos que sí iniciaron el TILT, eran mayores de 22 años (p=0,01 y respondieron correctamente las preguntas sobre conocimientos generales (p=0,04. Es resaltante que la tasa de conversión de PPD fue más alta a la reportada en la literatura y que la mayoría de estudiantes no siguió la profilaxis por falta de información.

  20. Comportamiento del consumidor de productos agroecológicos frente a la aplicación de buenas prácticas agrícolas

    Directory of Open Access Journals (Sweden)

    Jorge Merino Toro

    2016-06-01

    Full Text Available La presente investigación evalúa el comportamiento del consumidor de productos agroecológicos comercializados por productores de PACAT (Corporación de Asociaciones de Productores Agroecológicos y Comercio Asociativo de Tungurahua frente a la aplicación de Buenas Prácticas Agrícolas (BPA, tomando como punto de partida el aumento descontrolado de ferias que comercializan productos bajo la denominación de agroecológicos en la provincia de Tungurahua. La principal herramienta utilizada en esta investigación fue la encuesta, aplicada a una muestra de 217 consumidores y 33 productores agroecológicos, con el uso de esta herramienta se determinó el comportamiento del consumidor de la Plaza Pachano y además se analizó la aplicación de Buenas Prácticas Agrícolas. Se reconoce la alta calidad como la principal razón para consumir productos agroecológicos, la frescura constituye la característica física que más atrae, y el producto más comprado fueron las hortalizas. Respecto a productores se determinó que aplican correctamente BPA. Palabras clave: Economía del consumidor, mercados agrarios y marketing, análisis de la oferta y de la demanda, producción, consumo.

  1. EVOLUCIÓN DE LA VULNERABILIDAD FRENTE A FENÓMENOS ASOCIADOS CON DESLIZAMIENTOS E INUNDACIONES. CASO ZONA NORORIENTAL DE MEDELLÍN, 1960 -1990

    Directory of Open Access Journals (Sweden)

    Vidal G. Lina María

    2008-07-01

    Full Text Available Este artículo presenta la exploración de la evolución de la vulnerabilidad frente amenazas asociadas con deslizamientos e inundaciones en la Zona Nororiental de Medellín entre 1960 y 1990, vinculando los procesos de poblamiento con los enfoques de planificación y las políticas para el hábitat popular en la ciudad, que han potenciado la configuración de escenarios urbanos vulnerables. El abordaje del estudio de caso mostró que la vulnerabilidad se desplazó durante el periodo de estudio, siguiendo las trayectorias del poblamiento y de la expansión de la ciudad en función de características propias de la adaptación al entorno por parte de los pobladores, de procesos regionales y dinámicas influenciadas por políticas estatales de orden municipal. Debido a que la vulnerabilidad tuvo una tendencia acumulativa durante el periodo en estudio, se interpreta como un impacto ambiental de los procesos que inciden en su configuración, que no es puntual, ni espacial, ni temporalmente y tampoco obedece a una lógica de causa – efecto, sino que es complejo y está conectado con otras manifestaciones ambientales urbanas.

  2. Psicoterapia v/s Farmacoterapia I. Aproximación inicial a las fronteras disciplinarias e ideológicas frente a una praxis compartida.

    Directory of Open Access Journals (Sweden)

    Roberto Polanco C

    2007-01-01

    Full Text Available En el campo del tratamiento de los desordenes mentales existen hitos a lo largo de la historia moderna de la ciencia que sirven de referencia para poder entender el estado actual de dos importantes disciplinas cuyos campos disciplinarios se yuxtaponen. El objetivo de este artículo es aportar una primera reflexión sobre las formas de evaluar el campo de los desordenes mentales, se establece un especial énfasis crítico en el rol de la academia como ente formador y reproductor de estos grupos disciplinarios, además se introduce el debate sobre el papel de los psicólogos clínicos frente al uso de psicofármacos, proponiendo un debate que supere la reproducción de ciertos campos ideológicos que se traducen en “trincheras disciplinarias” las cuales se enfrentan al momento de establecer la praxis clínica en el campo social.

  3. Regionalismo estratégico: una respuesta frente a la glocalización. El desarrollo urbano posfordista en el este de Alemania

    Directory of Open Access Journals (Sweden)

    Claudia Tomadoni

    2016-07-01

    Full Text Available Los procesos de asociatividad territorial de una ciudad pueden derivar en proyectos de regionalización a diferentes escalas. Otrora, factores como conectividad, accesibilidad y proximidad eran imprescindibles para el posicionamiento urbano. En la actual glocalización ellos son insuficientes y dan lugar a desarrollos urbanos posfordistas. La ideología de la competitividad llevada al territorio condujo a diversos tipos de estrategias para jugar el juego de seducción al capital. La región emerge como la forma territorial que posibilita la entrada al “mercado de los lugares” que pertenecen al mundo global. La promoción de regiones es una estrategia para reforzar identidad frente a la globalización y funciona como factor para atraer actividades y población. No todas las ciudades tienen “éxito” pero la participación de agentes y la paradójica combinación de competitividad y asociatividad permiten corregir distorsiones. Aquí se aborda el caso de la ciudad-región Weimar, donde el regionalismo estratégico surge como uno de los caminos de reproducción urbana.

  4. Una nota sobre la responsabilidad moral individual frente a la calamidad del hambre (A note on the moral individual responsibility against the calamity of hunger

    Directory of Open Access Journals (Sweden)

    Macario Alemany García

    2012-07-01

    Full Text Available El texto da cuenta sucintamente del viejo problema de la responsabilidad moral de los ricos frente a las calamidades del hambre y la pobreza absoluta. Para ello, se presentan las propuestas de Ernesto Garzón y Peter Singer sobre el nivel de responsabilidad exigible y se señalan algunas críticas plausibles a las mismas. A continuación, se explica la última iniciativa de Singer para promover el fin de la pobreza absoluta y las tensiones que la misma entraña para su propia teoría. Finalmente, se aboga por considerar el asunto desde el punto de vista de la ética de las virtudes.ABSTRACTThe text briefly approaches the old problem of moral responsibility of the rich over the calamities of hunger and absolute poverty. To this end, it presents Ernesto Garzón and Peter Singer’s proposals about the level of accountability and it identifies some plausible critiques to them. Then, it explains Singer’s latest initiative to promote an end to absolute poverty and the tensions it poses to his own theory. Finally, it advocates for considering the matter from the point of view of virtue ethics.

  5. La evaluación psicológica forense frente a la evaluación clínica: propuestas y retos de futuro

    Directory of Open Access Journals (Sweden)

    Enrique Echeburúa

    2011-01-01

    Full Text Available En este estudio teórico se hace una revisión sobre los nuevos desarrollos para el uso efectivo de la evaluación psicológica en la práctica forense, adaptando la terminología psicológica al lenguaje jurídico, a la vez que se resaltan las diferencias más notables entre la evaluación clínica y la evaluación pericial. Se analizan algunos instrumentos específicos de evaluación surgidos en el contexto forense, como las escalas de predicción del riesgo de violencia y el procedimiento de validez del testimonio en los casos de abuso sexual infantil. Asimismo se aborda el problema del control de la simulación y de la detección del engaño, uno de los principales obstáculos a los que se ha de hacer frente en el ámbito forense. Se presta una atención específica a los problemas técnicos planteados por los dictámenes periciales, así como a los aspectos éticos referidos a ellos. Por último, se señalan propuestas prácticas de aplicación y se comentan las implicaciones de este estudio para investigaciones futuras.

  6. Mirando al sur sin perder de vista el norte. México frente a la Unión de Repúblicas Centroamericanas, 1885

    Directory of Open Access Journals (Sweden)

    Luz Carregha Lamadrid

    2018-04-01

    Full Text Available En el artículo se aborda el conflicto surgido en 1885, cuando el general Justo Rufino Barrios, presidente de Guatemala, proclamó de manera unilateral la Unión de Repúblicas Centroamericanas, y aseguró que la establecería aun por la vía armada. También se examina la postura del gobierno mexicano ante el conflicto que estalló y obligó a mirar a la frontera sur, a partir de las notas de los periódicos principales que circulaban entonces en la Ciudad de México, lo que permite también conocer la respuesta de la opinión pública de la época. El objetivo es explorar la política exterior del gobierno mexicano frente a un evento, que adquirió mayor relevancia cuando se extendió el temor de una posible intervención de Estados Unidos en el territorio nacional. Los hallazgos muestran que la reacción del general Porfirio Díaz ante el conflicto centroamericano contribuyó al fortalecimiento de su figura como “héroe de la paz”, que lo caracterizó.

  7. Atividade inibitória das folhas e caule de Kalanchoe brasiliensis Cambess frente a microrganismos com diferentes perfis de resistência a antibióticos

    Directory of Open Access Journals (Sweden)

    Jackeline G. da Silva

    Full Text Available A avaliação antimicrobiana das partes aéreas de Kalanchoe brasiliensis Cambess, Crassulaceae, a qual é comumente utilizada para o tratamento de inflamações da mucosa oral, bronquites e congestão nasal, é relatada. Esta atividade foi avaliada em discos de Petri usando o método de difusão para a determinação da Concentração Inibitória Mínima (MIC e cinética bactericida. Foram usadas amostras bacterianas gram-positivas, gram-negativas e cepas de fungos leveduriformes do gênero Cândida. Apenas o óleo essencial demonstrou ser efetivo, apresentando atividade frente amostras gram-positivas de Staphylococcus aureus (MRSA meticilina resistente. A ação observada foi considerada bacteriostática por reduzir um log10 UFC/mL a partir da sexta hora de exposição da amostra ao óleo essencial nas concentrações de 4% e 8%. Compostos fenólicos estão presentes em óleo essencial, sugerindo que o efeito foi devido à presença dos mesmos. Por este motivo à planta Kalanchoe brasiliensis Cambess pode representar uma alternativa terapêutica para infecções provocadas por Staphylococcus aureus.

  8. Explorando las fronteras entre la clínica y el arte: relato de una experiencia junto al Frente de Artistas del Borda

    Directory of Open Access Journals (Sweden)

    Sabrina Ferigato

    2011-01-01

    Full Text Available Este trabajo se constituye como un estudio cualitativo que aborda el uso del arte en la salud mental, y en particular lo que se produce en el espacio fronterizo entre esos dos campos. El debate emerge del relato de la experiencia desarrollada junto al Frente de Artistas del Borda, un movimiento coordinado por artistas y profesionales de la salud, en el Hospital Psicoasistencial José Tiburcio Borda de la Ciudad de Buenos Aires. Con base en los referentes teóricos de la Filosofía de la Diferencia, del Análisis Institucional y de la Clínica Psicosocial, este estudio se construye de acuerdo con los principios de la Reforma Psiquiátrica y con el movimiento de lucha antimanicomial. Los resultados y discusiones que presentamos implican el análisis de los datos obtenidos aplicando la metodología propia del trabajo de campo etnográfico, la observación participante con registro en diarios de campo y la revisión bibliográfica.

  9. Natural hybridization between Vanilla claviculata (W. Wright) Sw. and V. barbellata Rchb.f. (Orchidaceae): genetic, morphological, and pollination experimental data

    DEFF Research Database (Denmark)

    NIELSEN, LENE ROSTGAARD

    2000-01-01

    Vanilla claviculata (W. Wright) Sw. and V. barbellata Rchb.f. grow sympatrically in the southwestern part of herto Rico. At three localities in the range of the two species, individuals with flowers that appeared different from previously known species were found. To test whether these were hybrids...... the hypothesis that the individuals are hybrids, which is further augmented by interspecific pollination experiments between the putative parental species. This is the first case of natural hybridization reported in the genus Vanilla....

  10. Effects of PKM2 Gene Silencing on the Proliferation and Apoptosis of Colorectal Cancer LS-147T and SW620 Cells

    Directory of Open Access Journals (Sweden)

    Ran Ao

    2017-07-01

    Full Text Available Background/Aims: This paper aims to explore the effects of pyruvate kinase (PK M2 gene silencing on the proliferation and apoptosis of colorectal cancer (CRC LS-147T and SW620 cells. Methods: CRC LS-147T and SW620 cells highly expressing PKM2 were randomly selected by quantitative real-time polymerase chain reaction (qRT-PCR and then assigned into the blank (no transfection, PKM2-shRNA (transfection with shRNA and empty plasmid (transfection with empty plasmid groups. Immunofluorescence was applied to detect PKM2 protein expression. qRT-PCR and Western blotting were conducted to assess mRNA and protein expression of PKM2, p53 and p21. The cell counting kit-8 (CCK-8 assay was used to assess cell proliferation. Flow cytometry was used to assess the cell cycle and apoptosis rate, and a senescence-associated β-galactosidase staining kit was used to assess cell senescence. Results: PKM2 exhibited high mRNA expression among CRC LS-147T and SW620 cells with remarkable protein expression noted in the cytoplasm and nucleus. The PKM2-shRNA group exhibited reduced PKM2 mRNA and protein expression, whereas p53 and p21 expression was increased compared with the blank and empty plasmid groups. Cell proliferation in PKM2-shRNA cells decreased significantly compared with the blank group and empty plasmid groups. The PKM2-shRNA group exhibited more cells in the G1 phase and fewer cells in the G2/M phase compared with the blank and empty plasmid groups. In addition, the PKM2-shRNA group exhibited significantly increased apoptosis rates and β-galactosidase activity compared with the blank and empty plasmid groups. Conclusion: Our study demonstrates that PKM2 gene silencing suppresses proliferation and promotes apoptosis in LS-147T and SW620 cells.

  11. Suppressed invasive and migratory behaviors of SW1353 chondrosarcoma cells through the regulation of Src, Rac1 GTPase, and MMP13.

    Science.gov (United States)

    Xu, Wenxiao; Wan, Qiaoqiao; Na, Sungsoo; Yokota, Hiroki; Yan, Jing-Long; Hamamura, Kazunori

    2015-12-01

    Chondrosarcoma is the second frequent type of primary bone cancer. In response to stress to the endoplasmic reticulum, activation of eIF2α-mediated signaling is reported to induce apoptosis. However, its effects on invasive and migratory behaviors of chondrosarcoma have not been understood. Focusing on potential roles of Src kinase, Rac1 GTPase, and MMP13, we investigated eIF2α-driven regulation of SW1353 chondrosarcoma cells. In particular, we employed two chemical agents (salubrinal, Sal; and guanabenz, Gu) that elevate the level of eIF2α phosphorylation. The result revealed that both Sal and Gu reduced invasion and motility of SW1353 chondrosarcoma cells in a dose dependent manner. Live imaging using a fluorescent resonance energy transfer (FRET) technique showed that Sal and Gu downregulated activities of Src kinase as well as Rac1 GTPase in an eIF2α dependent manner. RNA interference experiments supported an eIF2α-mediated regulatory network in the inhibitory role of Sal and Gu. Partial silencing of MMP13 also suppressed malignant phenotypes of SW1353 chondrosarcoma cells. However, MMP13 was not regulated via eIF2α since administration of Sal but not Gu reduced expression of MMP13. In summary, we demonstrate that eIF2α dependent and independent pathways regulate invasion and motility of SW1353 chondrosarcoma cells, and inactivation of Src, Rac1, and MMP13 by Sal could provide a potential adjuvant therapy for combating metastatic chondrosarcoma cells. Copyright © 2015 Elsevier Inc. All rights reserved.

  12. Single-laboratory evaluation of SW-846 Methods 7090/7091 determination of beryllium by flame and furnace atomic absorption spectrophotometry. Summary report January-August 1987

    International Nuclear Information System (INIS)

    Hodge, V.F.; Darby, D.A.; Thompson, W.E.; Jones, C.L.

    1988-02-01

    The results of a single-laboratory study of the Determination of Beryllium by Flame and Furnace Atomic Absorption Spectrophotometry, are described. The study examined the application of these two powerful beryllium detection methods to the analysis of selected liquid and solid samples after digestion by appropriate SW-846 methods. Method performance data including detection limits, optimum concentration ranges (linearity), spike recoveries, interferences, precision, accuracy, and optimum operating parameters are presented and discussed

  13. Cadmium accumulation by Axonopus compressus (Sw.) P. Beauv and Cyperus rotundas Linn growing in cadmium solution and cadmium-zinc contaminated soil

    OpenAIRE

    Paitip Thiravetyan; Vibol Sao; Woranan Nakbanpote

    2007-01-01

    This research investigated the phyto-remediation potentials of Cyperus rotundas Linn (Nutgrass) and Axonopus compressus (Sw.) P. Beauv (Carpetgrass) for cadmium removal from cadmium solution andcadmium-zinc contaminated soil. Plants growth in the solution showed that cadmium decreased the relative growth rate of both grasses. However, the amount of cadmium accumulated in shoot and root was increasedwith the increase in cadmium concentration and exposure time. Growth in fertile soil mixed with...

  14. Protein-bound polysaccharide from Phellinus linteus inhibits tumor growth, invasion, and angiogenesis and alters Wnt/β-catenin in SW480 human colon cancer cells

    Directory of Open Access Journals (Sweden)

    Park Hae-Duck

    2011-07-01

    Full Text Available Abstract Background Polysaccharides extracted from the Phellinus linteus (PL mushroom are known to possess anti-tumor effects. However, the molecular mechanisms responsible for the anti-tumor properties of PL remain to be explored. Experiments were carried out to unravel the anticancer effects of PL. Methods The anti-cancer effects of PL were examined in SW480 colon cancer cells by evaluating cell proliferation, invasion and matrix metallo-proteinase (MMP activity. The anti-angiogenic effects of PL were examined by assessing human umbilical vein endothelial cell (HUVEC proliferation and capillary tube formation. The in vivo effect of PL was evaluated in an athymic nude mouse SW480 tumor engraft model. Results PL (125-1000 μg/mL significantly inhibited cell proliferation and decreased β-catenin expression in SW480 cells. Expression of cyclin D1, one of the downstream-regulated genes of β-catenin, and T-cell factor/lymphocyte enhancer binding factor (TCF/LEF transcription activity were also significantly reduced by PL treatment. PL inhibited in vitro invasion and motility as well as the activity of MMP-9. In addition, PL treatment inhibited HUVEC proliferation and capillary tube formation. Tumor growth of SW480 cells implanted into nude mice was significantly decreased as a consequence of PL treatment, and tumor tissues from treated animals showed an increase in the apoptotic index and a decrease in β-catenin expression. Moreover, the proliferation index and microvessel density were significantly decreased. Conclusions These data suggest that PL suppresses tumor growth, invasion, and angiogenesis through the inhibition of Wnt/β-catenin signaling in certain colon cancer cells.

  15. Significant strain accumulation between the deformation front and landward out-of-sequence thrusts in accretionary wedge of SW Taiwan revealed by cGPS and SAR interferometry

    Science.gov (United States)

    Tsai, M. C.

    2017-12-01

    High strain accumulation across the fold-and-thrust belt in Southwestern Taiwan are revealed by the Continuous GPS (cGPS) and SAR interferometry. This high strain is generally accommodated by the major active structures in fold-and-thrust belt of western Foothills in SW Taiwan connected to the accretionary wedge in the incipient are-continent collision zone. The active structures across the high strain accumulation include the deformation front around the Tainan Tableland, the Hochiali, Hsiaokangshan, Fangshan and Chishan faults. Among these active structures, the deformation pattern revealed from cGPS and SAR interferometry suggest that the Fangshan transfer fault may be a left-lateral fault zone with thrust component accommodating the westward differential motion of thrust sheets on both side of the fault. In addition, the Chishan fault connected to the splay fault bordering the lower-slope and upper-slope of the accretionary wedge which could be the major seismogenic fault and an out-of-sequence thrust fault in SW Taiwan. The big earthquakes resulted from the reactivation of out-of-sequence thrusts have been observed along the Nankai accretionary wedge, thus the assessment of the major seismogenic structures by strain accumulation between the frontal décollement and out-of-sequence thrusts is a crucial topic. According to the background seismicity, the low seismicity and mid-crust to mantle events are observed inland and the lower- and upper- slope domain offshore SW Taiwan, which rheologically implies the upper crust of the accretionary wedge is more or less aseimic. This result may suggest that the excess fluid pressure from the accretionary wedge not only has significantly weakened the prism materials as well as major fault zone, but also makes the accretionary wedge landward extension, which is why the low seismicity is observed in SW Taiwan area. Key words: Continuous GPS, SAR interferometry, strain rate, out-of-sequence thrust.

  16. Perbandingan Morfologi Dua Jenis Anggrek Epifit pada Pohon Rambutan ( Nephelium lappaceum L. : Acriopsis liliifolia (J.Koenig Seidenf. dan Dendrobium crumenatum Sw.

    Directory of Open Access Journals (Sweden)

    Nery Sofiyanti

    2016-03-01

    Full Text Available The stem of rambutan tree (Nephelium lappaceum has suitable microenvironment for the growth of epiphytic flora, due to its rugose stem. Therefore, it may trap and collect plant debrish or other organic material as well as rain drops. One of plant group found on the rambutan tree is orchid (Orchidaceae. This study aimed to observed the morphology of epihytic orchids on rambutan tree. The result showed two orchid species, Acriopsisliliifolia (J. Koenig Seidenf. and Dendrobium crumenatum Sw.

  17. Monitorização da força da ondulação na base da arriba (Pessegueiro, SW Portugal. Primeiros resultados

    Directory of Open Access Journals (Sweden)

    Mário Neves

    1997-11-01

    Full Text Available MEASUREMENT OF THE WAVE FORCE AT THE CLIFF BASE (PESSEGUEIRO, SW PORTUGAL. FIRST RESULTS. In this article the characteristicsof a new wave force sensor (EWIN are briefly described. This instrument was bolted to the shore platform of Pessegueiro on a first trial experience in Portugal. The maximum wave force records are also analysed in correlation with the wave climate accured in these occasions.

  18. Mecanismos da linha de frente e orientações empresariais: tradução, adaptação e validação de uma escala

    Directory of Open Access Journals (Sweden)

    George dos Reis Alba

    2013-09-01

    Full Text Available O trabalho de linha de frente das empresas pode ser observado como uma luta de três frentes. O cliente exige atenção e qualidade de serviço, de um lado, a organização exige eficiência e produtividade, de outro, e o pessoal da linha de frente é metaforicamente apanhado no centro. Essa abordagem surgiu como um tema relevante para Marinova, Ye e Singh (2008, que desenvolveram uma escala que avalia esses elementos por meio de cinco dimensões: duas orientações (produtividade e qualidade e três mecanismos (autonomia, coesão e feedback. O objetivo principal neste artigo foi adaptar a escala e verificar se ela pode ser utilizada no Brasil. Para isso, ela foi submetida a tradução e validação semântica, adaptação ao contexto de pesquisa e validação estatística. A escala foi aplicada em 105 estudantes de graduação e pós-graduação, e seus resultados foram estatisticamente satisfatórios, validando a versão brasileira da escala.

  19. Allelopathic effect of aqueous extracts of Eucalyptus globulus Labill. and of Casearia sylvestris Sw. on cropsEfeito alelopático de extratos aquosos de Eucalyptus globulus Labill. e de Casearia sylvestris Sw. sobre espécies cultivadas

    Directory of Open Access Journals (Sweden)

    Grasielle Soares Gusman

    2011-10-01

    Full Text Available Allelopathy is characterized by the harmful or benefic effects caused by secondary metabolites, that are produced by plants, microorganisms or fungi and are released in the environment, on the development of natural biological systems or implemented ones. This study aimed to evaluate the allelopathic effects of aqueous extracts of eucalypt (Eucalyptus globulus Labill. and wild coffee (Casearia sylvestris Sw. on the germination and initial development of mustard (Brassica campestris L., cabbage (Brassica oleracea L. cv. capitata, broccoli (Brassica oleracea L. cv. italica, kale (Brassica pekinensis L., lettuce (Lactuca sativa L. cv. grand rapids, tomato (Lycopersicum esculentum Miller, turnip (Brassica rapa L., rucola (Eruca sativa L. and radish (Raphanus sativus L.. Six concentrations of each aqueous extract were tested (10, 30, 50, 70, 90 and 100% and compared to control (distilled water, with five replicates of each concentration, being ten seeds of each crop distributed in each replicate. The aqueous extracts of E. globulus and C. sylvestris reduced significantly the percentage of seed germination, the index of germination speed and the initial growth of the above ground part and roots of all cultivated species, being the reduction of these parameters higher with the increment of the aqueous extracts concentration, which led to thicker and atrophied roots with a higher number of absorbent hairs. Therefore, the results indicate an existence of allelopathic potential of E. globulus and C. sylvestris.A alelopatia caracteriza-se pelos efeitos danosos ou benéficos que metabólitos secundários produzidos por plantas, microrganismos ou fungos liberados no ambiente exercem sobre o desenvolvimento de sistemas biológicos naturais ou implantados. O objetivo do trabalho foi avaliar o efeito alelopático de extratos aquosos de eucalipto (Eucalyptus globulus Labill. e guaçatonga (Casearia sylvestris Sw. na germinação e no crescimento inicial de

  20. Comparative evaluation of curcumin and curcumin loaded- dendrosome nanoparticle effects on the viability of SW480 colon carcinoma and Huh7 hepatoma cells

    Directory of Open Access Journals (Sweden)

    M.J. Dehghan Esmatabadi

    2015-06-01

    Full Text Available Background and objectives: Colorectal cancer is the third most common cancer and a major cause of morbidity globally. Hepatocellular carcinoma is a leading cause of death in the world. About 80% of all anticancer drugs are somehow related to natural products. One of the most important of these natural compounds is curcumin, the main component of turmeric that has a wide range of pharmacological activities. Curcumin has been found to suppress cell proliferation and decrease cell viability in various types of cancer cells; however, owing to lack of aqueous solubility, curcumin has shown reduced bioavailability in studies. Recent studies have shown that new 400th generation of dendrosome nanoparticle can increase bioavailability of curcumin and thus enhance the cytotoxic properties.  The aim of this study was to determine effectiveness of curcumin alone and in combination with 400th generation dendrosome nanoparticles (DNC on cell viability rate in SW480 and Huh7 cells. Methods: SW480 and Huh7 cells were incubated with different concentrations of curcumin and DNC (0-50μM for 24, 48 and 72 h. Then cytotoxicity was assessed by MTT assay and IC50 was determined. Results: The results suggested that the concentration-dependent inhibitory effect of DNC was stronger than curcumin on SW480 and Huh7 cells. Conclusion: The results suggest DNC as a more effective herbal anticancer agent for colorectal and hepatocellular tumors.