WorldWideScience

Sample records for program mono representacion

  1. Gamma spectra pictures using a digital plotter. Program MONO; Representacion de Espectros directos mediante un trazado digital. Prograa MONO

    Energy Technology Data Exchange (ETDEWEB)

    Los Arcos, J M

    1978-07-01

    The program MONO has been written for a CALCOMP-936 digital plotter operating off- -line with a UMI VAC 1106 computer, to obtain graphic representations of single gamma spectra stored on magnetic tape. It allows to plot the whole spectrum or only a part, as well as to draw a given spectrum on the same or different picture than the previous one. Ten representation scales are available and at up nine comment lines can be written in a graphic. (Author) 4 refs.

  2. Professional Android Programming with Mono for Android and NETC#

    CERN Document Server

    McClure, Wallace B; Croft, John J; Dick, Jonathan; Hardy, Chris

    2012-01-01

    A one-of-a-kind book on Android application development with Mono for Android The wait is over! For the millions of .NET/C# developers who have been eagerly awaiting the book that will guide them through the white-hot field of Android application programming, this is the book. As the first guide to focus on Mono for Android, this must-have resource dives into writing applications against Mono with C# and compiling executables that run on the Android family of devices. Putting the proven Wrox Professional format into practice, the authors provide you with the knowledge you need to become a succ

  3. Gamma spectra pictures using a digital plotter. Program MONO

    International Nuclear Information System (INIS)

    Los Arcos Merino, J.M.

    1978-01-01

    The program MONO has been written for a CALCOMP-936 digital plotter operating off- -line with a UMI VAC 1106 computer, to obtain graphic representations of single gamma spectra stored on magnetic tape. It allows to plot the whole spectrum or only a part, as well as to draw a given spectrum on the same or different picture than the previous one. Ten representation scales are available and at up nine comment lines can be written in a graphic. (Author) 4 refs

  4. Professional iPhone Programming with MonoTouch and .NET/C#

    CERN Document Server

    McClure, Wallace B; Dunn, Craig

    2010-01-01

    What .NET C# developers need to enter the hot field of iPhone apps. iPhone applications offer a hot opportunity for developers. Until the open source MonoTouch project, this field was limited to those familiar with Apple's programming languages. Now .NET and C# developers can join the party. This Wrox guide is the first book to cover MonoTouch, preparing developers to take advantage of this lucrative opportunity.: MonoTouch opens the field of iPhone app development to .NET and C# developers for the first time; the Wrox reputation among .NET developers assures them that this guide covers everyt

  5. MONO: A program to calculate synchrotron beamline monochromator throughputs

    International Nuclear Information System (INIS)

    Chapman, D.

    1989-01-01

    A set of Fortran programs have been developed to calculate the expected throughput of x-ray monochromators with a filtered synchrotron source and is applicable to bending magnet and wiggler beamlines. These programs calculate the normalized throughput and filtered synchrotron spectrum passed by multiple element, flat un- focussed monochromator crystals of the Bragg or Laue type as a function of incident beam divergence, energy and polarization. The reflected and transmitted beam of each crystal is calculated using the dynamical theory of diffraction. Multiple crystal arrangements in the dispersive and non-dispersive mode are allowed as well as crystal asymmetry and energy or angle offsets. Filters or windows of arbitrary elemental composition may be used to filter the incident synchrotron beam. This program should be useful to predict the intensities available from many beamline configurations as well as assist in the design of new monochromator and analyzer systems. 6 refs., 3 figs

  6. What's Mono?

    Science.gov (United States)

    ... mono? Have you ever heard of the "kissing disease"? If you said that it's mono, you're absolutely correct. But you don't get mono only from kissing. Infectious mononucleosis, called mono for short, is caused by the Epstein-Barr virus (EBV), which is a type of herpes ...

  7. Infancia y representaciones sociales Infancia y representaciones sociales

    Directory of Open Access Journals (Sweden)

    Ferrán Casas

    2006-06-01

    Full Text Available Se presenta un análisis y revisión de los elementos constituyentes de las representaciones sociales mayoritariamente compartidas acerca de la infancia en la sociedad occidental, como contribución a una mayor comprensión de los procesos de construcción de la infancia actual. Para entender el desarrollo histórico de las políticas sociales de infancia, se plantea la necesidad de profundizar en tres vertientes representacionales inseparables: (a Las representaciones sociales acerca de la infancia, (b acerca de sus problemas y necesidades sociales y (c acerca de las formas apropiadas de afrontar dichos problemas y necesidades. Se defiende la importancia de un cambio psicosocial para evitar que antiguas representaciones sobre la infancia resistentes a modificarse sigan generando una ruptura de la comunicación entre generaciones.A review and analysis of constituents of mainly shared social representations of childhood in western society are presented —essaying to contribute to a better understanding of the constructing processes of present childhood. In order to understand the historical development of childhood social policies the need of in-depth analysing three linked representational slopes is defended. They are (a social representations of childhood, (b social representations of children’s needs and children’s problems, and (c social representations on how to appropriately cope with such needs and problems. The need of a psychosocial change in order to avoid old social representations of childhood —which resist changing and are generating communicational gaps between generations— is posed.

  8. How Is Mono Spread?

    Science.gov (United States)

    ... How Is Mono Spread? Print My sister has mononucleosis. I drank out of her drink before we ... that I have mono now? – Kyle* Mono, or mononucleosis, is spread through direct contact with saliva. This ...

  9. Subjetividad social, sujeto y representaciones sociales

    OpenAIRE

    Fernando González Rey

    2008-01-01

    este trabajo discute algunos de los retos concernientes al desarrollo de representaciones sociales en la Psicología actual. Aal igual que con cualquier construcción teórica capaz de iluminar nuevos aspectos del pensamiento científico, el concepto de representaciones sociales se ha expandido a través de los autores que lo usan con diferentes bases teóricas y metodológicas. Sse introduce en la discusión sobre las alternativas actuales para el desarrollo de la representación social e...

  10. Lesbianas. Discursos y representaciones (Raquel Platero, Coord.

    Directory of Open Access Journals (Sweden)

    Nuria Gregori Flor

    2009-01-01

    Full Text Available Para poder leer el libro Lesbianas. Discursos y Representaciones, primero tuve que encontrarlo. Y no me estoy refiriendo a dificultades para adquirirlo dentro del mercado editorial. El ejemplar que disponía formaba parte del equipaje que me acompañaba a pasar unos días de descanso estival en la montaña con mis padres, tías/os, primos/as y abuelas. Era el contexto perfecto para reencontrarme con voces conocidas y admiradas; un baño de memoria, orgullo y “empoderamiento” para días de sol y tranquilidad.

  11. Mono- and combination drug therapies in hospitalized patients with bipolar depression. Data from the European drug surveillance program AMSP

    Directory of Open Access Journals (Sweden)

    Haeberle Anne

    2012-09-01

    Full Text Available Abstract Background For the pharmacological treatment of bipolar depression several guidelines exist. It is largely unknown, to what extent the prescriptions in daily clinical routine correspond to these evidence based recommendations and which combinations of psychotropic drugs are frequently used. Methods The prescriptions of psychotropic drugs were investigated of all in-patients with bipolar depression (n = 2246; time period 1994–2009 from hospitals participating in the drug surveillance program AMSP. For the drug use in 2010, 221 cases were analysed additionally. Results From 1994 to 2009, 85% of all patients received more than one class of psychotropic substances: 74% received antidepressants in combination therapy, 55% antipsychotics, 48% anticonvulsants and 33% lithium. When given in combination, lithium is the most often prescribed substance for bipolar depression (33%, followed by valproic acid (23%, mirtazapine and venlafaxine (16% each, quetiapine (15%, lamotrigine (14% and olanzapine (13%. Both, lithium and valproic acid are often combined with selective serotonin reuptake inhibitors (SSRI, but also with mirtazapine und venlafaxine. Combinations of more than one antidepressant occur quite often, whereby combinations with bupropion, paroxetine, fluoxetine or fluvoxamine are very rare. In 2010, quetiapine (alone and combined was the most frequently prescribed drug (39%; aripiprazole was administered in 10%. Conclusion Combinations of antidepressants (SSRI, mirtazapine, venlafaxine with mood stabilizers (lithium, valproic acid, lamotrigine and / or atypical antipsychotics (quetiapine, olanzapine are common. Of most of those combinations the efficacy has not been studied. The use of aripiprazole and the concomitant use of two or three antidepressants contrast the guidelines.

  12. How Long Is Mono Contagious?

    Science.gov (United States)

    ... Here's how it works: Mono is short for mononucleosis . It's usually caused by an infection with the ... May 2018 More on this topic for: Teens Mononucleosis How Do Doctors Test for Mono? Can a ...

  13. Inversor elevador mono - etapa

    OpenAIRE

    Herber Ramírez, Juan José De Jesús

    2006-01-01

    En este trabajo de tesis se estudia una topología Mono - Etapa de un Inversor Elevador. Esta estructura está formada por dos convertidores CD - CD Elevadores bidireccionales en corriente, los cuales son controlados por dos señales senoidales, con cierto nivel de CD, desfasadas 180º. Las principales ventajas que esta topología presenta son: 1) Este Inversor genera de manera natural, mediante el control adecuado, un voltaje CA de salida mayor que el voltaje de CD de entrada ...

  14. Representaciones sociales de la ética empresarial en Venezuela

    Directory of Open Access Journals (Sweden)

    Leslie Borjas de Xena

    2009-12-01

    Full Text Available La teoría de las representaciones sociales de autores como Moscovici y Jodelet constituye una propuesta crítica para abordar la realidad social desde la complejidad. Este artículo se basa en dicha teoría para analizar las representaciones de la ética empresarial como proceso social por una comunidad de empresarios venezolanos, a partir de una investigación realizada a través del enfoque interpretativo y el método complementario. Las representaciones sociales develadas fueron: responsabilidad, solidaridad y honestidad. Los resultados evidenciaron una conceptualización de la ética empresarial que converge con la responsabilidad con la sociedad como corporativa y comunitaria.

  15. Representaciones sociales acerca del concepto matemática

    OpenAIRE

    Clavel, Gerardo Neri; Ferrari, Marcela

    2009-01-01

    La presente investigación centra la atención en el contexto de la Teoría de Representaciones Sociales propuesta por Moscovici en 1961. Apoyándonos en esta teoría, realizamos un estudio y análisis de las Representaciones Sociales acerca del concepto “Matemática”, trabajo que tiene por objetivo identificar, analizar e interpretar algunos de los elementos que forman parte del sistema central, mediante un cuestionario aplicado a 29 estudiantes de preparatoria que forman parte del Instituto de Cie...

  16. MONO FOR CROSS-PLATFORM CONTROL SYSTEM ENVIRONMENT

    International Nuclear Information System (INIS)

    Nishimura, Hiroshi; Timossi, Chris

    2006-01-01

    Mono is an independent implementation of the .NET Framework by Novell that runs on multiple operating systems (including Windows, Linux and Macintosh) and allows any .NET compatible application to run unmodified. For instance Mono can run programs with graphical user interfaces (GUI) developed with the C(number s ign) language on Windows with Visual Studio (a full port of WinForm for Mono is in progress). We present the results of tests we performed to evaluate the portability of our controls system .NET applications from MS Windows to Linux

  17. Praxis y Ética en Psicología Comunitaria: Representaciones Sociales de Usuarias y Usuarios de Programas Comunitarios en la Región Metropolitana Praxis and Ethics in Community Psychology: Social Representations of Clients of Community Programs in the Metropolitan Region

    Directory of Open Access Journals (Sweden)

    Jorge Castillo

    2010-05-01

    Full Text Available La psicología comunitaria chilena ha experimentado una evolución que la ha situado como referente en las prácticas institucionales de intervención psicosocial. Esto ha implicado la normalización de las intervenciones, abandonando algunos preceptos que fundaran la disciplina, en un contexto carente de indicaciones éticas para el área. Como una forma de perfilar las prácticas disciplinares actuales y sus implicaciones éticas, se investigaron las representaciones sociales sobre la praxis profesional en usuarios/as de programas estatales y ONG, desde 4 entrevistas participativas a 32 usuarios/as. Se utilizaron herramientas del análisis del discurso. Los resultados muestran una fuerte valoración del vínculo profesional-usuario/a, un fortalecimiento progresivo desde el trabajo individual, dependencia de el//la profesional y una serie de prácticas consideradas correctas e incorrectas por los/as usuarios/as.Chilean community psychology has undergone an evolution that has positioned it as a reference in the institutional practices of psychosocial intervention. This has involved the standardization of interventions, resulting in the abandonment of some of the founding precepts of the discipline, in a context lacking ethical indications for the field. As a way of outlining the current disciplinary practices and their ethical implications, social representations of professional practice between clients of Government and NGO social programs were investigated, through the realization of 4 participatory interviews with 32 clients. Discourse analysis tools were used. The results show a strong appreciation of the relationship between client and professional, a progressive strengthening from individual work, professional dependence, and a series of correct and incorrect actions as perceived by the client.

  18. Mono pile foundation. Final report

    Energy Technology Data Exchange (ETDEWEB)

    Lyngesen, S.; Brendstrup, C.

    1997-02-01

    The use of mono piles as foundations for maritime structures has been developed during the last decades. The installation requirements within the offshore sector have resulted in equipment enabling driving of piles up to 3-4 m to large penetration depths. The availability of this equipment has made the use of large mono piles feasible as foundations for structures like wind turbines. The mono pile foundations consists of three parts; the bare pile, a conical transition and a boat landing. All parts are prefitted at the yard in order to minimise the installation work that has to be carried out offshore. The study of a mono pile foundations for a 1.5 MW wind turbine has been conducted for two locations, Horns Rev and Roedsand. Three different water depths: 5, 8 and 11 m have been investigated in the study. The on-site welding between pile and conical transition is performed by an automatic welding machine. Final testing and eventually repair of the weld are conducted at least 16 hours after welding. This is followed by final installation of J-tube, tie-in to subsea cables and installation of the impressed current system for corrosive protection of the mono pile. The total cost for procurement and installation of the mono pile using the welded connection is estimated. The price does not include procurement and installation of access platform and boat landing. These costs are estimated to 250.000 DKK. Depending on water depth the cost of the pile ranges from 2,2 to 2,7 million DKK. Procurement and fabrication of the pile are approx. 75% of the total costs. The remaining 25% are due to installation. The total costs are very sensitive to the unit price of pile steel. During the project it became obvious that ice load has a very large influence on the dimensions of the mono pile. (EG)

  19. Festival nimega Mono / Ivar Sakk

    Index Scriptorium Estoniae

    Sakk, Ivar, 1962-

    2015-01-01

    Haapsalu graafilise disaini festival Haapsalu Linnagaleriis: sisaldab ülevaate- ja teemanäitust ning väikest sümpoosioni. Temaatilise aastanäituse motiiv on "MONO". Plakateid on ka välismaa tegijatelt. Kuraator Marko Kekishev

  20. El proceso de representaciones sobre las FARC. 1964. Los inicios

    OpenAIRE

    Penagos Carreño, Julián

    2013-01-01

    Este artículo presenta una parte de la investigación concerniente al procesode construcción de representaciones en la prensa nacional e internacionalsobre las Fuerzas Armadas Revolucionarias de Colombia-Ejército del Pueblo–FARC-EP– durante un periodo que comprende su inicio como grupo guerrilleroen 1964 y su consolidación como un ejército que puso en vilo al Estadocolombiano en 1996. Este ensayo se enfoca de manera exclusiva en el primeraño de origen de esta guerrilla, enfáticamente en el año...

  1. Representaciones sobre las normas de género: la resistencia al cambio

    Directory of Open Access Journals (Sweden)

    Alejandra Martínez

    2011-10-01

    Full Text Available El presente artículo es producto de un trabajo de investigación realizado entre 2006 y 2009 en la ciudad de Córdoba, Argentina. Uno de los objetivos centrales de dicho estudio fue analizar las representaciones de las normas de género en varones y mujeres, y relacionar dichas representaciones con sus condiciones objetivas de existencia. En este escrito mostramos las articulaciones resultantes entre representaciones y condiciones objetivas -específicamente aquellas relativas a la posesión/carencia de capital económico y cultural-, poniendo en relieve la resistencia de las representaciones más tradicionales asociadas a las normas de género.

  2. Representaciones de serpientes en la iconografía mitraica

    Directory of Open Access Journals (Sweden)

    Julio Muñoz García-Vaso

    1990-01-01

    Full Text Available Desde finales del siglo pasado, en que se inicia el estudio sistemático del culto a Mithra, las representaciones de serpientes en la inconografía mitraica son objeto de una atención especial por parte de los investigadores. En el presente artículo estudiamos la presencia de la serpiente, como elemento iconográfico, en tres de las más genuinas imágenes del culto mitraico: 1. La Tauroctonía, escena cumbre del sacrificio del toro por Mithra. 2. El «grupo trinarlo» león-crátera-serpiente. 3. La figura de una divinidad, generalmente leontocéfala, rodeada por los anillos de una serpiente y dotada de alas, íntimamente relacionada con los Misterios de Mithra.

  3. Las representaciones de alabardas en los grabados rupestres gallegos

    Directory of Open Access Journals (Sweden)

    Antonio de la PEÑA SANTOS

    2009-10-01

    Full Text Available RESUMEN: Se estudian en este trabajo las representaciones de alabardas localizadas hasta el presente en los grabados rupestres gallegos de la Edad del Bronce. El autor comienza analizando la diferente tipología de las alabardas de la Península Ibérica, pasando luego a describir los seis complejos de arte rupestre (Castriño de Conxo, Primadorno I, Xan de Deus, Montecelo, Laxe da Chan y Poza da Lagoa en los que se han localizado representaciones de este tipo de arma; a continuación describe diferentes paralelos en las estelas portuguesas y en los grabados rupestres alpinos y norteafricanos, para finalizar estableciendo los caracteres tipológicos de las alabardas representadas en los grabados rupesttes gallegos, clasifincado las más claras como ejemplares del tipo Carrapatas o Nortportugués, característico de la Primera Edad del Bronce y con evidentes relaciones con las Islas Británicas.ABSTRACT: In this work are studied the representations of halberds localized until now in the Galicia's rock carvings of the Bronze-age. The author begins by analyzing the different typology of the halberds of the Ibetic Peninsula; he passes later to describe the six main complexes of prehistoric art (Castriño de Conxo, Primadorno L, Xan de Deus, Montecelo, Laxe da Chan and Poza da Lagoa where has been localized representations of that kind of weapon; later on, he describes the différents parallels with the steles of Portugal and with the rock carvings of the Alps and north Africa, and he finishs by describing the typological characters of the halberds represented in the Galicia's rock carvings, and he classified the ones perfect as examples of the type «Carrapatas» or «Nortportugués», that is characteristic of the early bronze-age and it has great relations with the Btitish Isles.

  4. Programa de Saúde da Família: um espaço para a reconstrução das representações sociais do processo saúde-doença? Programa de Salud de la Familia: un espacio para recontrucción de las representaciones sociales del proceso salud-enfermedad? Family Health Program: a space for the reconstruction of social representations of the health-disease process?

    Directory of Open Access Journals (Sweden)

    Liane Oliveira Souza Gomes

    2006-10-01

    Full Text Available Estudo qualitativo investigou as representações sociais do processo saúde-doença de famílias acompanhadas pelo PSF na zona rural de Lafaiete Coutinho-BA, objetivando analisar as representações sociais das famílias acerca do processo saúde doença. A técnica de coleta foi a entrevista semi-estruturada com 23 membros das famílias. Utilizou-se a análise de conteúdo para a compreensão dos núcleos de sentido. Os resultados apontam que o PSF interfere na reconstrução das representações sociais do processo saúde-doença, através da organização dos serviços de saúde e da produção social da saúde. Conclui-se que o PSF vem contribuindo para a democratização do conhecimento do processo saúde-doença, contudo é preciso desmistificar valores culturais reforçados por um modelo de atenção que enfatizava a cura de doenças.Esto estudio cualitativo investigó las representaciones sociales sobre el proceso salud-enfermedad de familias que reciben atención del Programa de Salud de la Familia en la zona rural Lafaiete Coutinho, Bahia, Brasil, objectivando analisar las representaciones sociales de familias sobre el proceso salud-enfermedad. Los datos fueran recogidos por medio de entevista semi-estructurada con 23 miembros de varias familias. La analisis de contenido fué utilizada para comprender los nucleos de sentido. Los resultados apuntan que el PSF interfere en la recontrucción de las representaiones sociales del proceso salud-enfermedad, por medio de la organización de los servicios de salud y de la producción social de salud. Se hay concluido que el PSF tiene contribuido para la democratización del conocimiento del proceso salud-enfermedad, mientras es necesario dismistificar los valores culturales por un modelo de atención que enfatize la reabilitación de enfermedades.A qualitative study that investigated the social representations of health-disease process of families accompanied by Family Health Program (FHP in

  5. REPRESENTACIONES DEL GRUPO SIMÉTRICO CON MATRICES ENTERAS

    Directory of Open Access Journals (Sweden)

    Fernando Novoa

    2002-12-01

    Full Text Available La representación de grupos de simetría es uno de los ternas en álgebra abstracta con más aplicaciones en la actualidad. El análisis espectral en diseño de experimentos, el diseño de redes de comunicación, la teoría de códigos, son algunos de los campos en donde esta teoría encuentra aplicación. A pesar de su utilidad, no siempre se encuentra a disposición del profesor y del estudiante una herramienta didáctica que le permita hacer ejemplos, cómputos y comprobaciones de los enunciados teóricos y se tiene que conformar con los ejemplos triviales que no le permiten ver realmente el grado de profundidad del concepto ni la complejidad del cálculo. El propósito de la siguiente nota es presentar un programa computacional para el sistema computacional CoCoA y en particular, ciertas rutinas que permiten calcular las representaciones irreducibles de los grupos de simetría en forma matricial, cuyas matrices tienen sus entradas enteras.

  6. Representaciones sociales estudiantiles y evaluación docente

    Directory of Open Access Journals (Sweden)

    María Isabel Arbesú García

    2016-01-01

    Full Text Available Este trabajo analiza las Representaciones Sociales de los estudiantes de licenciatura y de posgrado de la División de cyad de la uam-x, respecto al estímulo económico para obtener la beca a la docencia a partir de un cuestionario que responden los alumnos para valorar el trabajo docente. De 16 preguntas se analizó la número cua-tro: ¿Alguno de tus profesores ha hablado contigo sobre el cuestionario de evaluación docente? Participaron un total de 121 estudiantes. El estudio reveló que 60.34% de los alumnos respondieron que no habían hablado con sus profesores sobre la im-portancia de la evaluación y el 39.66% aseguraron que sí lo habían hecho. El silencio denota el bajo interés de los maestros por la evaluación, el segundo grupo comenta que los maestros están a favor de la evaluación por el estímulo económico que se suma a su salario.

  7. Las tareas escolares: representaciones de los docentes de lenguas

    Directory of Open Access Journals (Sweden)

    Jaime Ruiz Vega

    2015-09-01

    Full Text Available El artículo presenta los resultados que se obtuvieron en el desarrollo del proyecto “La movilización discursiva de valores sociales asociados a la entidad léxica tarea escolar en la educación básica y media en Bogotá” (DLE-361-13, que tuvo como objetivo identificar y analizar las concepciones que de las tareas escolares tienen los docentes de educación básica y media de Bogotá. En primera instancia, se da cuenta de la metodología que estructuró el trabajo, la cual se sustenta en las orientaciones de la semántica de los posibles argumentativos (spa; luego, se ofrece el análisis de los datos obtenidos en lo que respecta al núcleo de la entidad léxica tarea escolar, los estereotipos y los valores asociados a estos, tanto en el discurso lexicográfico como en el de los docentes; finalmente, se establece la comparación entre el discurso lexicográfico y el de los docentes con el fin de identificar los elementos comunes de las dos representaciones y mostrar los despliegues inéditos del significado léxico obtenidos en los datos de los encuestados.

  8. La brecha digital: representaciones sociales de docentes en una escuela marginal

    Directory of Open Access Journals (Sweden)

    Luz del Sol Vesga-Parra

    2013-03-01

    Full Text Available En este artículo exponemos las Representaciones Sociales que tienen los docentes y las docentes frente a las Tecnologías de la Información y la Comunicación, y cómo ellas están ligadas a su experiencia vital, y se convierten en la base para acceder, relacionarse y apropiarse de ellas en sus entornos personales y profesionales. Para comprender dichas representaciones, realizamos una investigación cualitativa utilizando la Teoría Fundamentada. La interpretación de las Representaciones Sociales nos muestra cómo docentes y estudiantes de escuelas públicas colombianas permanecen actualmente en la brecha digital -por extensión y por profundidad- y cómo esta se reproduce en la escuela con expresiones de desigualdad y exclusión social.

  9. Niimina Ahubiya: Western Mono Song Genres

    OpenAIRE

    Loether, Christopher

    1993-01-01

    Although Native American communities may lose their ancestral language or other aspects of their traditional culture, music seems to be more resistant to the continual onslaught of the dominant Euro-American culture. Even today, traditional music remains a vital part of Native American communities throughout the United States. In this article I examine one aspect of the musical traditions of the Western Mono, specifically the different types of songs, and their functions within Western Mono s...

  10. Persistencia de las representaciones sociales del cáncer de mama

    OpenAIRE

    Giraldo-Mora, Clara V.

    2012-01-01

    Objetivo Comprender las representaciones sociales del cáncer de mama para un grupo de mujeres de la ciudad de Medellín, la influencia en su prevención y en las prácticas de autocuidado. Metodos Estudio cualitativo con 19 entrevistas semiestructuradas con mujeres adultas que no han tenido cáncer de mama, utilizando el criterio de máxima variación como técnica de muestreo. El análisis se orientó por la teoría fundamentada. Resultados Algunas mujeres tienen representaciones fisiológicas del cánc...

  11. Representaciones sociales del matrimonio en el adulto joven de la ciudad de Santa Marta

    OpenAIRE

    Otero Díaz, Javier

    2017-01-01

    Las representaciones sociales del matrimonio son una construcción social donde se configura el bagaje de conocimientos que tienen las personas sobre el concepto del matrimonio, las cuales establecen desde estas construcciones, una cosmovisión sobre el mundo y ellos mismos. Desde una mirada sistémica este estudio analizó las representaciones sociales que sobre el matrimonio poseen los jóvenes adultos de la ciudad de Santa Marta. Se trató de una investigación cualitativa de diseño fenomenológic...

  12. Representaciones sociales del embarazo, construidas por las adolescentes embarazadas del municipio La Tebaida 2014

    OpenAIRE

    Patiño Hurtado, Anny Vanessa

    2016-01-01

    Objetivo general: Interpretar las representaciones sociales sobre el embarazo, construidas por las adolescentes gestantes del municipio la Tebaida 2014. Metodología: Estudio cualitativo interpretativo. Aborda conocimientos, actitudes, prácticas, fuentes de información y la identificación del nodo central y sistema periférico sobre las que se construyen las representaciones sociales. Se aplicaron 31 encuestas a las adolescentes de las 84 que pertenecían al curso sicoprofiláctico, un grupo ...

  13. Consenso y divergencias en las representaciones sociales de la dirigencia política

    OpenAIRE

    Torres Stöckl, Cynthia María; Zubieta, Elena Mercedes

    2015-01-01

    Se analiza descriptivamente la faceta consensual y diferencial de las representaciones sociales sobre la dirigencia política, en base a una muestra de estudiantes de la Facultad de Psicología y en la Facultad de Filosofía y Letras de la Universidad Nacional de Tucumán (UNT)-Argentina. Los resultados muestran un universo representacional en tensión caracterizado por componentes nucleares contrarios: Liderazgo y Representación versus Poder y Corrupción; y por dimensiones opuestas: Característic...

  14. Las alucinaciones y el delirio como representaciones anancásticas

    OpenAIRE

    Rojas Malpica, Carlos

    2010-01-01

    El problema de las representaciones Karl Jaspers introdujo una diferenciación entre percepción y representación que, mejor vista, plantea un falso dilema. Según el gran psicopatólogo alemán las percepciones son corpóreas y se originan en el espacio objetivo exterior, mientras que las representaciones son incorpóreas y provienen del mundo subjetivo interior. Con arreglo a su criterio, corporeidad-imaginación, espacio exterior-espacio interior son oposiciones absolutas que separan siempre y sin...

  15. Representaciones en el museo del oro de la ciudad de Bogotá

    Directory of Open Access Journals (Sweden)

    Sandra Camelo

    Full Text Available El artículo gira alrededor de las preguntas: ¿qué representaciones de los indígenas y su cultura material están presentes en la actual colección permanente del Museo del Oro?, ¿cómo han cambiado tales representaciones? Y ¿qué correlatos de guías y visitantes las acompañan en la visitas a la colección? Se pretende mostrar el carácter contingente de estas prácticas de representación del Museo, así como sus discontinuidades y tensiones subyacentes.

  16. Menopausia: representaciones sociales y prácticas

    Directory of Open Access Journals (Sweden)

    Pelcastre-Villafuerte Blanca

    2001-01-01

    Full Text Available Objetivo. Caracterizar los significados que se atribuyen al proceso de la menopausia como una primera aproximación al mundo representacional de este evento. Material y métodos. Estudio cualitativo, hecho entre septiembre y octubre de 1998 con 20 mujeres de entre 45 y 65 años de edad, residentes en los municipios de Cuernavaca y Emiliano Zapata del estado de Morelos, México. Se efectuaron sendas entrevistas a profundidad, utilizando una guía con los siguientes apartados: datos sociodemográficos, diagnóstico, sentimientos y sensaciones, cambios en el estilo de vida, cambios fisiológicos e información. Resultados. Se halla una representación que se construye alrededor de la menopausia en términos de cese de la fertilidad y entrada al envejecimiento. Esta caracterización tiene que ver también con otras construcciones como la concepción de la mujer, del cuerpo y de la sexualidad. Conclusiones. En este artículo se retoman principalmente los resultados con relación a las prácticas de las mujeres como consecuencia de la vivencia que tienen de la menopausia, entre las que sobresale la visita al médico. Se discuten las implicaciones desde el marco de la construcción social de los significados. El texto completo en inglés de este artículo está disponible en: http://www.insp.mx/salud/index.html

  17. Viajando sobre hojas volanderas: representaciones del viaje en pliegos sueltos del siglo XVIII

    OpenAIRE

    Gomis, Juan

    2016-01-01

    El tema que aborda este trabajo son las representaciones del viaje y de los viajeros en los romances del siglo XVIII. Los objetivos son, en primer lugar, dar a conocer una fuente «popular» en relación a un tema, el viaje, que para el siglo XVIII ha s

  18. Representations of eating and of a nutrition program among female caregivers of children under 5 years old in Tizimin, Yucatan, Mexico Representaciones sobre la alimentación y el programa de nutrición entre mujeres responsables de niños mexicanos menores de 5 años Representação da alimentação e de programa alimentar entre mulheres responsáveis por crianças mexicanas menores de 5 anos

    Directory of Open Access Journals (Sweden)

    Gloria de los Ángeles Uicab-Pool

    2009-12-01

    Full Text Available This study was carried out between January and April 2008 with 14 caregivers of children younger than 5 years residing in Tizimín city, Mexico. It aimed to understand the social representations of eating and the Programa Oportunidades [Opportunity Program] held by caregivers taking into account their social and cultural context. This qualitative investigation with an ethnographic approach was based on participant observation and semi-structured interviews. Two empirical categories emerged: 1 feeding and 2 an aid. The first refers to the caregivers' representation of eating patterns of children younger than 5 years and the second reveals that the program is considered an aid, which favors and helps caregivers to meet part of their needs. The study achieved the proposed objectives since it enabled us to understand caregivers in the complex task of feeding these children and also to propose strategies in several spheres to improve infant nutrition.El estudio fue realizado con 14 responsables del cuidado del menor de 5 años en Tizimín, México, durante el período de enero la abril de 2008. Se buscó comprender las representaciones sociales de estas personas en relación a la alimentación y la los componentes de nutrición del Programa Oportunidades, considerando el contexto social y cultural. La investigación cualitativa con abordaje antropológico, tipo etnográfico tuvo como base la observación participante y las entrevistas semiestructuradas, dirigidas a las responsables. De los resultados emergieron dos categorías empíricas: 1 dar de comer y 2 una ayuda. La primera se refiere a cómo las responsables representan la alimentación del menor de 5 años y la segunda reveló que el Programa es considerado una ayuda y que las apoya a solucionar, en parte, sus necesidades. Se alcanzaron los objetivos al comprender a las responsables en esa tarea compleja que realizan de alimentar a los niños y así proponer estrategias, en varias esferas

  19. Medio ambiente y educación ambiental: representaciones sociales de los profesores en formación

    Directory of Open Access Journals (Sweden)

    Raúl Calixto Flores

    2010-06-01

    Full Text Available Una de las líneas actuales de investigación educativa que aporta elementos valiosos para comprender los procesos de formación de los sujetos es la que corresponde a las representaciones sociales. En este artículo se describen los aspectos centrales de la investigación Representaciones del medio ambiente de los estudiantes de la licenciatura en educación primaria. Con las representaciones los estudiantes discriminan espacio-temporalmente los elementos del medio ambiente, estableciendo correspondencias con las prácticas sociales. Entre los resultados de la investigación referida se encuentra la existencia de una relación entre las representaciones del medio ambiente y las corrientes de la educación ambiental.

  20. Medio ambiente y educación ambiental: representaciones sociales de los profesores en formación

    Directory of Open Access Journals (Sweden)

    Raúl Calixto Flores

    2010-01-01

    Full Text Available Una de las líneas actuales de investigación educativa que aporta elementos valiosos para comprender los procesos de formación de los sujetos es la que corresponde a las representaciones sociales. En este artículo se describen los aspectos centrales de la investigación Representaciones del medio ambiente de los estudiantes de la licenciatura en educación primaria. Con las representaciones los estudiantes discriminan espaciotemporalmente los elementos del medio ambiente, estableciendo correspondencias con las prácticas sociales. Entre los resultados de la investigación referida se encuentra la existencia de una relación entre las representaciones del medio ambiente y las corrientes de la educación ambiental.

  1. Educación básica e inclusión: un estudio de representaciones sociales

    Directory of Open Access Journals (Sweden)

    Felicita Garnique-Castro

    2012-01-01

    Full Text Available Este artículo se deriva de la investigación Las representaciones sociales sobre la inclusión. Una mirada desde el campo de la educación básica, cuyo fin fue identificar las representaciones sociales que sobre la inclusión de la diversidad escolar tienen los maestros, directivos y supervisores de educación básica en México. Específicamente, se expone el análisis del discurso producido por aquellas profesoras denominadas colaboradoras. A partir de una metodología cualitativa, se analizan las condiciones en que se producen y circulan las representaciones sociales de estas maestras y los problemas que enfrentan en la tarea de incorporar la inclusión en las aulas escolares. Los resultados permiten identificar cómo esas representaciones sociales guían sus actitudes, valores y comportamientos dentro del aula.

  2. Tubes, Mono Jets, Squeeze Out and CME

    Energy Technology Data Exchange (ETDEWEB)

    Longacre, R. [Brookhaven National Lab. (BNL), Upton, NY (United States)

    2017-10-23

    Glasma Flux Tubes, Mono Jets with squeeze out flow around them plus the Chiral Magnetic Effect(CME) are physical phenomenon that generate two particle correlation with respect to the reaction plane in mid-central 20% to 30% Au-Au collision √sNN = 200.0 GeV measured at RHIC.

  3. MUJERES BRAVAS: REPRESENTACIONES DE LA VIOLENCIA EN MUÑECA BRAVA DE LUCÍA GUERRA

    Directory of Open Access Journals (Sweden)

    Paula Daniela Bianchi

    2013-01-01

    Full Text Available El propósito de este texto es explorar algunas representaciones de cuerpos muertos de prostitutas que responden a diversas articulaciones —discursivas, sexuales y políticas— en la novela de Lucía Guerra Muñeca brava (1993. Para abordar este análisis se teje una cartografía textual vinculada con distintos modos de producción que atraviesan escenas simbólicas con nociones de rituales funerarios y “usos” de estos cuerpos en relación con diferentes representaciones de la violencia. El cuerpo de las prostitutas resignifica el espacio de la calle como lugar de lucha política invisibilizado por la dictadura chilena.

  4. Representaciones sociales de la computadora en usuarios semirrurales de México

    Directory of Open Access Journals (Sweden)

    Marco Antonio González-Pérez

    2012-01-01

    Full Text Available Este artículo de investigación se deriva de un estudio de campo realizado para identificar representaciones sociales (RS de la computadora en usuarios de los Centros Comunitarios de Aprendizaje del Instituto Tecnológico y de Estudios Superiores de Monterrey, ITESM. Se aplicaron dos instrumentos: prueba de asociación libre y guion de entrevista a muestras de 217 sujetos, en la primera condición y 31, en la segunda. El estudio se realizó en Chapa de Mota y Villas del Carbón, Estado de México. Se mostraron representaciones sociales, RS, cambiantes entre usuarios con base en edad y tiempo de uso y se observó cómo los miembros de la comunidad insertan la computadora en sus actividades cotidianas.

  5. Representaciones sociales hacia la cultura del metal de un grupo de "metaleros" de Bogotá

    Directory of Open Access Journals (Sweden)

    Lady Vanessa Maldonado

    2009-01-01

    Full Text Available Esta es una investigación empírico-analítica de tipo descriptivo, con un diseño transversal, cuyo propósito es determinar las representaciones sociales hacia la cultura del metal de un grupo de metaleros de Bogotá. Para ello se trabajó con una muestra de 111 metaleros con edades comprendidas entre los 18 y los 30 años, de Bogotá, a los cuales se les aplicó una prueba de asociación libre de palabras. Los resultados obtenidos en la investigación mostraron que las representaciones sociales que tienen los metaleros con respecto a su propia cultura se relacionan con una posición de inconformidad ante las normas de la sociedad, así como con la energía y poder, generado por la música metal.

  6. ANÁLISIS DE LAS REPRESENTACIONES GEOMÉTRICAS EN LOS LIBROS DE TEXTO

    Directory of Open Access Journals (Sweden)

    Manuel Barrantes

    2015-01-01

    Full Text Available La investigación analiza y clasifica las imágenes gráficas relacionadas con la ense- ñanza-aprendizaje de la Geometría en libros de texto. Se estudian varios aspectos de las representaciones geométricas a lo largo de las unidades de geometría de los libros. Algunos de estos aspectos son la variedad de representaciones al introducir conceptos geométricos, los elementos de las imágenes que puedan derivar en dificultades en el proceso de enseñanza-aprendizaje de la Geometría, la representación plana de figuras tridimensionales y las imágenes reales que se utilizan para aludir a elementos geométricos abstractos. Se realiza una categorización que sirve como instrumento de análisis de los textos.

  7. 1984. Representaciones de las Farc en la prensa: guerrilla comunista o narcoguerrilla

    Directory of Open Access Journals (Sweden)

    Julián Penagos-Carreño

    2015-01-01

    Full Text Available Este artículo presenta una parte de la investigación concerniente al proceso de construcción de representaciones en la prensa nacional e internacional sobre las Fuerzas Armadas Revolucionarias de Colombia-Ejército del Pueblo –Farc-EP– durante un periodo que comprende su inicio como grupo guerrillero en 1964 y su consolidación como un ejército que puso en vilo al Estado colombiano en 1996. Este ensayo se enfoca de manera exclusiva en los meses de mayo a junio de 1984, el primer mes del “cese al fuego” acordado con el gobierno de Belisario Betancur (1982-1986. Se trabaja la ambivalencia de las representaciones y cómo poco a poco se empieza a configurar la imagen de una narcoguerrilla.

  8. REPRESENTACIONES PARACIENTÍFICAS DE CUERPO Y PERSISTENCIAS TECNOLÓGICAS

    Directory of Open Access Journals (Sweden)

    David Casado Neira

    2010-01-01

    Full Text Available El objetivo del trabajo es mostrar que las representaciones corporales actuales están lejos de los cyborgs. La opción más realista es la concepción moderna del cuerpo asentada en procesos de racionalización, secularización y medicalización. Para ello me remitiré a la imagen de cuerpo como máquina mostrando ejemplos representativos.

  9. LA LECTURA Y LA ESCRITURA: UN ESTUDIO SOBRE REPRESENTACIONES SOCIALES DE ESTUDIANTES UNIVERSITARIOS

    OpenAIRE

    Karina Savio

    2015-01-01

    En este artículo, nos proponemos describir y analizar las representaciones sociales de un grupo de estudiantes de la Universidad Nacional Arturo Jauretche, de Argentina, con el objetivo de desentrañar tanto el modo en que estos estudiantes se perciben como lectores y escritores, como el modo en que conciben estas prácticas académicas. Consideramos que estas construcciones imaginarias inciden en el trabajo concreto de los estudiantes y en sus estu...

  10. IRIS Toxicological Review of Ethylene Glycol Mono Butyl Ether (Egbe) (Final Report)

    Science.gov (United States)

    EPA has finalized the Toxicological Review of Ethylene Glycol Mono Butyl Ether: in support of the Integrated Risk Information System (IRIS). Now final, this assessment may be used by EPA’s program and regional offices to inform decisions to protect human health.

  11. Estudio psicosocial sobre las representaciones sociales de género

    Directory of Open Access Journals (Sweden)

    Teresa Cristina Bruel dos Santos

    2013-01-01

    Full Text Available Se presenta un estudio de las representaciones sociales acerca de lo masculino y lo femenino elaboradas por una muestra de 435 estudiantes de la Comunidad Autónoma de Madrid. Para el análisis de dichas representaciones se ha utilizado el método de Asociación Libre de Palabras a un conjunto de estímulos inductores. Los resultados del escalamiento multidimensional que asocia los siete estímulos inductores muestran dos claros campos semánticos: el primero, formado por los estímulos inductores desigualdad y violencia; el segundo, formado por los estímulos inductores hombre, masculino, mujer, femenino. La formación del campo semántico indica similitud, una relación de proximidad entre los términos asociados. Los análisis y la discusión de los hallazgos se centran en torno a las representaciones sociales de lo femenino y lo masculino, eje central del debate propuesto.

  12. Salud bucal: representaciones sociales en madres gestantes de una población urbana. Medellín, Colombia Oral health: social representations among pregnant mothers. Medellin, Colombia

    Directory of Open Access Journals (Sweden)

    Gloria Escobar-Paucar

    2011-11-01

    Full Text Available A partir de la teoría de las representaciones sociales, se realizó una investigación cualitativa con el propósito de comprender las representaciones sociales del proceso salud-enfermedad bucal en madres gestantes de una población urbana. Se entrevistaron 28 mujeres adultas asistentes al programa prenatal en una institución de salud de la ciudad de Medellín. Las entrevistas fueron grabadas y transcritas y se analizaron mediante codificación abierta, axial y selectiva, de acuerdo con la teoría fundada. Los hallazgos revelaron que si bien para las madres gestantes la boca del hijo no ocupa un lugar preponderante al inicio del ciclo vital, gana importancia con el proceso de crecimiento y desarrollo del niño, cuando además de su papel en la masticación y alimentación, adquiere una carga social relevante. El análisis dio cuenta de cómo confluyen en las madres de una población urbana representaciones arraigadas en la tradición, con nuevas visiones en cuya construcción hay elementos de los discursos profesionales y de los medios de comunicación; entre ellas, la estrecha relación salud bucal-dientes, la salud atada a prácticas saludables y a la utilización de servicios de salud y salud bucal como ventaja social, relacionada con la estética.Based on the theory of social representations, a qualitative investigation was conducted in order to assess social representations in oral heath in pregnant mothers living in an urban environment. Twenty-eight pregnant adult women attending a prenatal program at a health institution in the city of Medellín, Colombia, were interviewed. The interviews were recorded and transcribed; analysis was performed through open, axial and selective coding, in line with grounded theory. Findings revealed that although pregnant mothers are not greatly concerned about oral health after birth and in early childhood, it increases in importance during growth and development of the child when, besides chewing and

  13. Políticas de juventud en la ciudad de Buenos Aires : Representaciones de agentes públicos de Parque Patricios y Barracas en torno a la juventud adolescente y violencia

    OpenAIRE

    Arias Montes, Constanza

    2016-01-01

    En este trabajo se describen y analizan las representaciones que tienen algunos agentes estatales, efectores de política pública en los barrios Parque Patricios y Barracas de la ciudad de Buenos Aires, sobre los jóvenes adolescentes, sobre violencia en la juventud y sobre políticas públicas dirigidas a ese sector de la población. El trabajo fue construido a partir de la toma de entrevistas, en el año 2013, a empleados en servicios de atención primaria de la salud (área programática del Hospit...

  14. Simple quantum systems in the momentum representation; Sistema de cuantica simple en la representacion de un momneto

    Energy Technology Data Exchange (ETDEWEB)

    Guillaumin-Espana, E; Salas Brito, A. L [Universidad Autonoma Metropolitana-Azcapotzalco, Mexico, D.F (Mexico); Martinez y Romero, R. P. [Universidad Nacional Autonoma de Mexico, Mexico, D.F (Mexico); Nunez-Yepez, H. N. [Universidad Autonoma-Iztapalapa, Mexico, D.F (Mexico)

    2001-02-01

    The momentum representation is little used in quantum mechanics courses. Some students are hence surprised by the change in viewpoint when, in doing advanced work, they have to use the momentum rather than the coordinate representation. In this work, we give an introduction to quantum mechanics in momentum space. To this end we discuss standard elementary problems, namely, the free particle, the quantum motion under a constant potential function, a particle interacting with a potential step function, and the motion of a particle under a oscillatory potential function. What is not standard is that they are all conceived from momentum space and hence they, with the exception of the free particle, are not equivalent to the coordinate space ones with the same names. We solve for the bound eigenstates of the problems working within the momentum representation trying not to make explicit reference to the systems they correspond to in the coordinate representation. [Spanish] La representacion de los impetus es muy poco empleada en los cursos de mecanica cuantica. Ello es causa de que muchos estudiantes queden un tanto confundidos, por el cambio de representacion cuando tienen que usar aquella, en vez de la mas usual de las coordenadas, al comenzar trabajos mas avanzados. Esta contribucion ofrece una introduccion a la mecanica cuantica en el espacio de los impetus. Con este fin analizamos sistemas elementales tipicos, a saber, la particula libre, el movimiento cuantico bajo una funcion de potencial constante, la interaccion con una funcion de potencial de tipo escalon y el movimiento en una funcion oscilante de potencial. Lo que es poco usual es que los sistemas se conciben desde la representacion de los impetus y, por lo tanto, con la excepcion de la particula libre, no pueden considerarse equivalentes a aquellos con el mismo nombre pero en la representacion de las coordenadas. Encontramos los eigenestados ligados de los problemas trabajando en la representacion de los

  15. REPRESENTACIONES DE LA BASURA Y SU RELACION SOCIOCULTURALES EN INSTITUCIONES EDUCATIVAS DE BARRANCABERMEJA

    Directory of Open Access Journals (Sweden)

    Silvio Daza Rosales

    2015-12-01

    Full Text Available En este trabajo se describen las representaciones de la basura que tienen los estudiantes de escuelas ubicadas en dos contextos socioculturales educativos en Barrancabermeja. Uno de ellos es de una en la institución pública y que, gran parte de la comunidad educativa vive del reciclaje, y la otra es una institución educativa privada, el  psicopedagógico de estrato social tres y cuatro. La población fue de 44 estudiantes de quinto grado de primaria. Los resultados muestran la existencia de cuatro representaciones de la basura, una relacionada con el gran sentido de pertenencia y concientización al cuidado del ambiente, como los  buenos hábitos y depositar la basura en su lugar; otra relacionada solamente con el manejo de la basura , reciclar y reutilizar; una  tercera relacionada con el concepto que se tiene hacia las personas que viven de la basura y por último, el relacionado con la personalidad categorizándolos como sucios o  consumidores de drogas. Se concluye  que estas representaciones se asocian con el contexto sociocultural y económico y se deben tener en cuenta en el manejo conceptual, procedimental, actitudinal. Es fundamental proponer en  la unidad  de enseñanza de la  basura, un discurso ciudadano en el que manejo de la misma; posibilite en términos pedagógicos y didácticos una tarea ciudadana, en una opción de construir ciudadanía.

  16. Rosas y espinas. Representaciones de las mujeres en el arte colombiano 1868-1910

    Directory of Open Access Journals (Sweden)

    Luz Adriana Hoyos

    2015-12-01

    Full Text Available El principal objetivo de este artículo es exponer los principales planteamientos y conclusiones de la investigación “Mujeres Visibles/Mujeres invisibles. Representaciones de las mujeres en el arte colombiano 1868–1910”. El análisis de pinturas, dibujos y series litográficas de cuadros de costumbres durante el período escogido muestra cómo las representaciones de las mujeres legitimaron modelos diferenciados para los distintos sectores sociales. La metodología utilizada es propia de la Historia Cultural que estudia las representaciones y la difusión y circulación de las producciones culturales. Como categorías de análisis se usaron los conceptos de Pierre Bordieu: Campo, Distinción y Habitus que se aplicaron específicamente a la época estudiada y permitieron determinar la influencia que tuvieron las élites tanto en la producción de las obras de arte, como en la creación de prácticas que, asociadas a los manuales y a la prensa dedicada a la mujeres definieron formas de comportamiento que atribuyeron a éstas características morales y cristianas específicas. El estudio concluye cómo una gran parte de los retratos femeninos seleccionados definieron un modelo idealizado de mujer que se sumó a las estrategias de difusión establecidas por los grupos de élite.

  17. CLASIFICACION MÚLTIPLE DE ITEMS Y LAS REPRESENTACIONES SOCIALES SOBRE AMBIENTE EN PROFESORES RURALES

    Directory of Open Access Journals (Sweden)

    Jennifer León Acosta

    2010-01-01

    Full Text Available Este artículo se deriva del proyecto de investigación: «Transformación de las representaciones sociales sobre el ambiente en relación con las prácticas y experiencias pedagógicas de maestros rurales de Sumapaz y Ciudad Bolívar », con el cual se pretenden identificar algunas representaciones sociales, en torno al ambiente, de dos grupos de profesores rurales de Bogotá D.C., Colombia. Se desarrolló en dos Instituciones Educativas Rurales: Gimnasio del Campo Juan de la Cruz Varela (Sumapaz y Colegio Rural Quiba Alta (Ciudad Bolívar, y se utilizó una entrevista de tipo semiestructurada, desarrollada mediante la técnica Clasificación Múltiple de Ítems (CMI. El análisis se efectuó a través de categorías previas, tomadas de las tipologías de ambiente propuestas por Sauvé y Orellana (2002. A partir de lo anterior, se pudieron identificar categorías comunes y particulares para cada grupo de profesores. Fueron comunes: ambiente como medio de vida y naturaleza; y, particulares: contexto, paisaje, biosfera, proyecto comunitario -para Sumapaz-, sistema y territorio -para Ciudad Bolívar-. En conclusión, se evidenció que los profesores tienen una tendencia analítica sobre el ambiente; que existen diversas representaciones sociales de ambiente, las cuales guardan relación con su quehacer profesional, su cotidianidad y su contexto; que hay convergencias en las categorías, ya que se identifica el ambiente como medio de subsistencia y medio natural que les rodea. Es por esto que, posiblemente, tienen dificultades para interrelacionar diferentes elementos del ambiente.

  18. On mono-W signatures in spin-1 simplified models

    Directory of Open Access Journals (Sweden)

    Ulrich Haisch

    2016-09-01

    Full Text Available The potential sensitivity to isospin-breaking effects makes LHC searches for mono-W signatures promising probes of the coupling structure between the Standard Model and dark matter. It has been shown, however, that the strong sensitivity of the mono-W channel to the relative magnitude and sign of the up-type and down-type quark couplings to dark matter is an artifact of unitarity violation. We provide three different solutions to this mono-W problem in the context of spin-1 simplified models and briefly discuss the impact that our findings have on the prospects of mono-W searches at future LHC runs.

  19. On mono-W signatures in spin-1 simplified models

    International Nuclear Information System (INIS)

    Haisch, Ulrich; Tait, Tim M.P.

    2016-03-01

    The potential sensitivity to isospin-breaking effects makes LHC searches for mono-W signatures promising probes of the coupling structure between the Standard Model and dark matter. It has been shown, however, that the strong sensitivity of the mono-W channel to the relative magnitude and sign of the up-type and down-type quark couplings to dark matter is an artefact of unitarity violation. We provide three different solutions to this mono-W problem in the context of spin-1 simplified models and briefly discuss the impact that our findings have on the prospects of mono-W searches at future LHC runs.

  20. Representaciones mentales de creatividad de los maestros de básica primaria del Colegio General Rafael Reyes

    OpenAIRE

    Mesa Mejía, Alba Liliana

    2005-01-01

    Tesis (Maestría en Educación y Desarrollo Humano). Universidad de Manizales. Facultad de Ciencias Sociales y Humanas. CINDE, 2005 La pregunta central de esta investigación es: ¿Cuáles son las representaciones mentales de creatividad de los maestros de básica primaria del Colegio General Rafael Reyes? Solamente indagando sobre las representaciones mentales de creatividad de los maestros se podrá conocer y entender cuál es la posición y el lugar que cada uno de ellos le de a la m...

  1. Representaciones sociales del abandono escolar en el espacio de la pobreza

    OpenAIRE

    Mª Ángeles Delgado Burgos; Carlos García de la Santa Delgado; Jesús María Aparicio Gervás

    2015-01-01

    El discurso institucional educativo del Buen Vivir en Ecuador está muy distante de la realidad de los estudiantes y sus familias, tomando vi- sibilidad en el alto porcentaje de abandono escolar. Esta desarticulación, ya endémica, condujo la investigación al hábitat de la pobreza con el objetivo de descubrir las asociaciones semióticas de los estudiantes y el contexto próximo de su génesis, el núcleo familiar. La aplicación de la teoría de las representaciones sociales combinada con técnicas d...

  2. Opiniones y representaciones sociales de varones sobre aborto en Buenos Aires, Argentina

    OpenAIRE

    Petracci,Mónica

    2011-01-01

    Este artículo está basado en una investigación cualitativa cuyo objetivo fue explorar las opiniones de varones de 25 a 39 años de estratos socioeconómicos medios y populares, residentes en el Área Metropolitana de la Ciudad de Buenos Aires, Argentina (n: 30) acerca de la despenalización del aborto y sus representaciones sociales sobre el mismo. Los hallazgos han corroborado resultados previos y han aportado nuevos conocimientos. Se confirmó la ambivalencia de los discursos sobre el aborto, ya...

  3. Imagen corporal y representaciones alimentarias en mujeres de trece comunidades rurales mexicanas

    OpenAIRE

    Sara Elena Pérez Gil.; Gabriela Romero J.

    2018-01-01

    Introducción: Estudios de nutrición en México apuntan en tres direcciones: la obesidad, como un problema de salud pública, particularmente en la población femenina; el aumento de otros padecimientos como anorexia y bulimia; y el incremento de la preocupación por el cuerpo, que lleva a transformar algunas prácticas y representaciones alimentarias no solo en población urbana, sino en mujeres de las zonas rurales. Objetivos: tener un primer acercamiento a la percepción corporal de las mujeres d...

  4. Experiencias encarnadas. Representaciones audiovisuales de madre(s) y maternidad(es)

    OpenAIRE

    Brigidi, Serena

    2014-01-01

    [ES] El artículo presenta una reflexión encarnada sobre la experiencia de ser madre y las representaciones de la maternidad en la cultura occidental, en anuncios y series televisivas, documentales y películas. Habitualmente, la maternidad es imaginada como el producto (tener un hijo, convertirse en madre) y no como el arduo proceso que representa a lo largo de la vida de una persona. Se opta por presentarla con un carácter universal y se usa como una estrategia cinematográfica cua...

  5. El cuerpo de las jóvenes madres solteras universitarias: representaciones y estrategias

    OpenAIRE

    Rosa María Huerta Mata

    2018-01-01

    Se analizan las estrategias que crean las madres solteras sobre sus cuerpos, así como las representaciones de éstos en la universidad, en el sistema de salud y en las redes de apoyo familiar de las estudiantes universitarias. Para ello realizamos entrevistas en profundidad a 14 docentes y personal administrativo de la Universidad Autónoma de San Luis Potosí entre febrero a mayo del año 2014. Además elaboramos los relatos de vida de ocho jóvenes madres solteras que asisten a la Facultad de Cie...

  6. El cuerpo de las jóvenes madres solteras universitarias: representaciones y estrategias

    OpenAIRE

    Rosa María Huerta Mata

    2018-01-01

    Resumen: Se analizan las estrategias que crean las madres solteras sobre sus cuerpos, así como las representaciones de éstos en la universidad, en el sistema de salud y en las redes de apoyo familiar de las estudiantes universitarias. Para ello realizamos entrevistas en profundidad a 14 docentes y personal administrativo de la Universidad Autónoma de San Luis Potosí entre febrero a mayo del año 2014. Además elaboramos los relatos de vida de ocho jóvenes madres solteras que asisten a la Facult...

  7. Las representaciones figuradas del yo y sus reflexiones en la narrativa de Gonzalo Hidalgo Bayal

    OpenAIRE

    Calvo Revilla, Ana

    2015-01-01

    En esta investigación abordaremos las representaciones figuradas y simulacros del yo y su reflexiones en la obra narrativa de Gonzalo Hidalgo Bayal. Analizaremos los recursos de literaturización del yo, que permiten trascender la referencialidad biográfica: la hibridación de los elementos autobiográficos e imaginados en los asuntos narrados, la ruptura de la linealidad narrativa, la introspección, la multiplicación de los artificios textuales, los juegos narrativos, la ambigüedad, los juegos ...

  8. Representaciones del sentido de vida en jóvenes estudiantes mexicanos en contextos de violencia

    OpenAIRE

    Arturo Chacón Castañón; Salvador Salazar Gutiérrez

    2015-01-01

    El texto muestra los resultados de un cuestionario aplicado a jóvenes estudiantes de nivel bachillerato y universitario, en relación a sus proyectos de vida en contextos de violencia en Ciudad Juárez, México. A partir de la distinción de violencias de alto impacto y violencias cotidianas de siempre, planteamos el impacto que generan en las prácticas y representaciones de sus expectativas de vida, teniendo en cuenta una perspectiva de género.

  9. Experiencia y representaciones del mundo natural e una comunidad andina de Cajamarca

    Directory of Open Access Journals (Sweden)

    Ana De La Torre A.

    1985-12-01

    Full Text Available En este trabajo se exponen algunos aspectos de la organización conceptual del mundo natural en una comunidad campesina en la Sierra Norte del Perú. Se presentan en primer lugar las categorías clasificatorias utilizadas como criterios organizadores de la multiplicidad del mundo sensible en el aspecto de la Flora. Luego se exponen las representaciones colectivas surgidas como elaboraciones ideológicas en base a la organización de la experiencia sensible.

  10. High pressure behaviour of uranium mono pnictides

    International Nuclear Information System (INIS)

    Pagare, Gitanjali; Ojha, Poonam; Sanyal, S.P.; Aynyas, Mahendra

    2006-01-01

    The pressure induced structural phase transition of three actinide mono pnictides AX (A=U and X=As, Sb, Bi), have been studied theoretically using two body interionic potential with necessary modifications to include the effect of Coulomb screening by the delocalized 5f electrons of the actinide (uranium) ion. The peculiar properties of these compounds have been interpreted in terms of the hybridization of f electrons with the conduction band. The calculated compression curves are compared with the experimental results. These compounds exhibits first order crystallographic phase transition from their NaCl (B 1 ) phase to CsCl (B 2 ) phase at 17GPa, 9.5GPa and 5.3 GPa respectively. The NaCl phase possesses lower energy than CsCl phase and stable at ambient pressure. (author)

  11. Scour properties of mono bucket foundation

    DEFF Research Database (Denmark)

    Stroescu, Ionut Emanuel; Frigaard, Peter Bak

    2016-01-01

    Field experience proved that the Mono Bucket Foundations (MBFs) have good response against scour development. Moreover, the ratio between large diameter (bucket lid) and the small diameter (shaft tower) is the driving parameter for the process of erosion/backfill, like scour protection diameter...... in the case of scour protected monopiles. However, the structural design to reduce the scour development for MBFs is still open to optimization. The influences of parameters that generate backfill and scour, the transfer load webs and the misalignment with seabed, have not been systematically studied until...... analysis compared with real surveys and existing studies showed good agreements. Scour protection based on collar solution shows high efficiency when scour protection should be required. The paper demonstrates good agreement between field measurements and small-scale studies. The unique value of the field...

  12. Opiniones y representaciones sociales de varones sobre aborto en Buenos Aires, Argentina

    Directory of Open Access Journals (Sweden)

    Mónica Petracci

    Full Text Available Este artículo está basado en una investigación cualitativa cuyo objetivo fue explorar las opiniones de varones de 25 a 39 años de estratos socioeconómicos medios y populares, residentes en el Área Metropolitana de la Ciudad de Buenos Aires, Argentina (n: 30 acerca de la despenalización del aborto y sus representaciones sociales sobre el mismo. Los hallazgos han corroborado resultados previos y han aportado nuevos conocimientos. Se confirmó la ambivalencia de los discursos sobre el aborto, ya que primaron una opinión favorable a su despenalización, y una representación social fundada en un eje moral opuesto al aborto. De los resultados se desprende la necesidad de investigar los puntos de vista de los varones sobre los derechos de mujeres y varones, y de profundizar los sondeos de opinión a través de estudios cualitativos en los que se indaguen sus representaciones sociales en el campo de los derechos sexuales y reproductivos.

  13. Representaciones sociales a futuro en la publicidad / Future social representations in advertising

    Directory of Open Access Journals (Sweden)

    Lucía Hellín

    2010-08-01

    Full Text Available RESUMEN: En este artículo analizamos las representaciones sociales a futuro construidas en la publicidad.Más específicamente, cómo el modo de presentar u omitir a los participantes y contextos produce el borramiento en el plano simbólico de las relaciones sociales que sustentan el modo de vida implicado en los mensajes publicitarios. Para el análisis tomaremos la noción de análisis multimodal propuesta por Kress y Van Leeuwen (2001. Las representaciones resultantes, parapersuadirnos, acentúan con fuerza los aspectos individuales borrando la inscripción social de toda acción individual. ABSTRACT: This article's purpose is the study of future social representations built in graphic advertising. More specically, how the way participants and contexts are shown produces the erasure in the symbolic plane of the social relations that ground the lifestyle implied by those messages. We will use the multimodal analysis developed by Kress & Van Leeuwen(2001. The outcoming representations, in order to persuade us, heavily stress the individual aspects, erasing the social inscription of any individual action.

  14. Representaciones mentales sobre los tipos de agresión en escolares

    Directory of Open Access Journals (Sweden)

    Yuly Fang Alandette

    2009-01-01

    Full Text Available Este artículo presenta un estudio descriptivo comparativo de corte transversal acerca de las representaciones mentales de los tipos de agresión en una muestra de 60 niños escolarizados, de 8 a 11 años de edad. Los niños provienen de los niveles socio-económicos alto y bajo de la ciudad de Cartagena. Para recolectar la información, se utilizó la técnica de entrevista clínica piagetiana de tipo semi-estructurada, apoyada con dibujos que permitieron explorar las ideas y sentimientos de los niños y las niñas. Las explicaciones de los niños son más claras y estructuradas respecto a las agresiones directas de tipo físico y verbal, adiferencia de las representaciones de agresiones, tales como la amenaza y exclusión que se muestran menos elaboradas. Aunque se observan diferencias de acuerdo con la edad al identificar los tipos de agresión y las categorías evaluadas, las explicaciones difieren en muchos casos de los resultados de otras investigaciones.

  15. Migración y representaciones regionales: discursos sobre la Región de Antofagasta

    Directory of Open Access Journals (Sweden)

    Luis Miguel Rodrigo

    2014-05-01

    Full Text Available El estudio de la migración interna se ha basado tradicionalmente en una concepción banal del espacio, sin tener en cuenta cómo las representaciones regionales, el espacio construido socialmente, afectan la decisión de migrar a otra región. Este trabajo utiliza las metodologías del grupo de discusión y el análisis sociológico del discurso para identificar los discursos de los futuros profesionales de otras regiones de Chile sobre la Región de Antofagasta, área minera localizada en el norte del país. A pesar de la prosperidad creciente de esta región durante las dos últimas décadas, los discursos que la representan poseen una denotación negativa, con distintos rasgos según la distancia socioespacial a esta región y el género del hablante. Estas representaciones podrían limitar la llegada de migrantes calificados y mujeres a Antofagasta y afectar negativamente el desarrollo futuro de la región.

  16. Representaciones sociales de la salud sexual de adolescentes sordos y oyentes en la ciudad de Bogotá

    Directory of Open Access Journals (Sweden)

    Jaime Collazos Aldana

    2012-01-01

    Full Text Available Objetivo. Describir y analizar la estructura y contenidos de las representaciones sociales de la salud sexual de tres grupos de adolescentes: sordos usuarios de lengua de señas colombiana (LSC, oyentes y sordos usuarios de castellano oral, con el fin de reflexionar sobre la salud sexual en poblaciones en situación de vulnerabilidad y su aplicación al campo de la salud pública. Método. Se realizó un estudio cualitativo interpretativo de orientación procesual, en el que se emplearon las técnicas analíticas de uso de redes de asociaciones, entrevistas y dibujos. Resultados. Se encontraron diferentes representaciones de salud sexual en los adolescentes evaluados: los adolescentes sordos usuarios de LSC, quienes focalizan sus representaciones en el cuidado del cuerpo, la enfermedad y el goce sexual. Por su parte, los oyentes construyen representaciones alrededor de la prevención de las infecciones de transmisión sexual y el amor afectivo; mientras los adolescentes sordos usuarios del castellano lo hacen en relación con la educación, el amor afectivo y las relaciones convencionales. Conclusion. El reconocimiento de las diferentes representaciones sociales de la salud sexual de los adolescentes oyentes y sordos se convierte en un reto para la Salud Pública en la medida que obliga a reconocer las necesidades y servicios, en este campo, desde una perspectiva diferencial. La salud sexual de las personas en situación de vulnerabilidad, es un asunto de Derechos Humanos, que cuestiona la manera de formular políticas en la actualidad, sobre todo cuando se desconoce la identidad como elemento fundamental de la sexualidad de estas personas.

  17. Reconfiguración de representaciones y descentramientos de la mirada

    Directory of Open Access Journals (Sweden)

    Cleopatra Barrios Cristaldo

    2016-01-01

    Full Text Available [es] Este artículo aborda la reconfiguración de representaciones identitarias y los descentramientos de la mirada en fotografías contemporáneas. La reflexión se focaliza en imágenes de la festividad del gaucho Antonio Gil, una de las manifestaciones de la religiosidad popular argentina más difundidas en la última década. En la indagación observamos que las representaciones visuales se encuentran fuertemente ligadas a retóricas de la nacionalidad. También analizamos la reconfiguración de representaciones como un proceso que se ve afectado por descentramientos de la mirada fotográfica. Estos mecanismos desestabilizan los esquemas de visibilidad establecidos y producen nuevas formas de ver, representar y per-formar las identidades. El análisis es interdisciplinar, con aportes de los estudios culturalesvisuales, la historia del arte y la crítica latinoamericana de la comunicación. El corpus está conformado por fotografías tomadas entre 2008 y 2012 por los fotógrafos argentinos Juan Pablo Faccioli y Guillermo Rusconi, en diálogo con otras narrativas. [en] This paper discusses the representational reconfiguration of identity and decentering of the contemporary photographic gaze. The study focus on images of Gaucho Antonio Gil festivity, one of the most widespread manifestation of popular religiosity in the last decade in Argentina. These visual representations are strongly linked to national rhetorics. We also analyze the representational reconfiguration as a process affected by the decentering of the photographic gaze. These mechanisms destabilize established visibility schemes, producing new ways of seeing, representing and performing the identities.This work is an interdisciplinary analysis, with contributions from Cultural and Visual Studies, History of Art and the Latin American Communication Criticism. We analyze photographs taken between 2008 and 2012 by Argentine photographers Juan Pablo Faccioli and Guillermo Rusconi, in

  18. Representaciones sociales, contaminación ambiental y barrios periféricos

    Directory of Open Access Journals (Sweden)

    Sandra Valeria Ursino

    2013-01-01

    Full Text Available Desde sus orígenes, las ciudades se encuentran atravesadas por problemáticas vinculadas a lo económico, político, social y cultural. En este trabajo se enfatizará en la dimensión socioambiental de las ciudades, considerando a la misma como una característica del entorno que se articula sustancialmente con la vida diaria de los habitantes, sobre todo con los que residen en barrios precarios linderos a grandes conglomerados urbanos como es el caso del barrio Danubio, Porst y Villa Inflamable de la localidad de Dock Sud.En esta línea, el objetivo principal consistió en conocer y analizar las representaciones sociales de la contaminación ambiental y las prácticas espaciales que construyen los habitantes de estos barrios periféricos de Dock Sud.Para ello, se utilizó una metodología cualitativa que implicó principalmente la realización de observación directa, entrevistas en profundidad y semi-estructuradas a los habitantes de los barrios. Dichas herramientas permitieron arribar a los siguientes resultados: en primera instancia se observó, a través del análisis de las representaciones que sobre Dock Sud tienen sus habitantes, débiles puentes de continuidad entre lo que se presenta a la vista, lo que realmente perciben de su entorno, y las prácticas espaciales que realizan en el mismo. En segundo lugar, los cambios que en la fisonomía tuvo Dock Sud, complejizó el campo de las representaciones sociales de sus habitantes, en las cuales aparecen elementos simbólicos de apego al lugar vinculados a la inmigración europea, a las dinámicas de trabajo industrial del momento, y al aprovechamiento de los espacios verdes y colectivos que permitían el uso y la cercanía de los habitantes al rio y la costa.Finalmente, se pudo apreciar que el crecimiento que tuvo el polo petroquímico y el puerto han modificado la infraestructura urbano-espacial de Dock Sud construyendo barrios “encapsulados” por la dinámica territorial que imponen

  19. 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

  20. Obstáculos para generar representaciones mentales adecuadas sobre la disolución

    Directory of Open Access Journals (Sweden)

    Nora Nappa

    2005-01-01

    Full Text Available La intención del presente trabajo es realizar un análisis de los obstáculos más importantes en la generación de representaciones mentales sobre el fenómeno de disolución. La metodología utilizada corresponde a la de investigación cualitativa y el instrumento de recolección de datos fue la entrevista teachback. También son sugeridas algunas implicaciones didácticas en cuanto a la secuencia, organización y profundidad de los temas involucrados en el aprendizaje de dicho fenómeno

  1. Representantes y representaciones indígenas en el altiplano occidental de Guatemala

    OpenAIRE

    Celigueta, Gemma

    2014-01-01

    Este artículo se pregunta por la relación entre una representación política indígena y las representaciones existentes sobre dicho grupo. En concreto, demuestra la relación entre el concurso de Reina indígena del municipio de Quetzaltenango y la representación política indígena en la municipalidad. Además, los avatares del concurso permiten adentrarnos en el movimiento indígena de la segunda mitad del siglo XX. Un movimiento que plantea una redefinición de lo indígena y de su papel en las nac...

  2. La incorporación y representaciones espaciales del Nuevo Mundo en el Viejo Mundo

    Directory of Open Access Journals (Sweden)

    Alejandra Toscana Aparicio

    2012-02-01

    Full Text Available En este trabajo se propone una aproximación para el estudio del paisaje, considerándolo como un conjunto de elementos tanto físico-naturales como sociales, configurado a través de procesos histórico-culturales, susceptible de ser representado simbólicamente. Se analizan tres diversas maneras de relación espacio físicocultura, que oscilan entre el “compromiso” y el “distanciamiento”, y que dan lugar a variadas formas de representación del espacio, las cuales ordenan la experiencia espacial y producen identidades. El descubrimiento del Nuevo Mundo y sus representaciones en el Viejo Mundo se utilizan como ejemplo.

  3. Las empresas multinivel como modelo distópico: estudio de representaciones sociales

    Directory of Open Access Journals (Sweden)

    Mónica Maisterrena González

    2014-07-01

    Full Text Available El presente estudio muestra las estrategias utilizadas por las empresas multinivel para ejercer un esquema homogéneo de representaciones sociales entre los asociados de las mismas. Se ha determinado la inevitabilidad de mantener un control "ideológico” sobre los asociados para el correcto funcionamiento de la empresa. La dinámica empresarial de estas compañías propone un modelo de satisfacción personal que debe ser transmitido y no puede ser cuestionado y que, por tanto, violenta la individualidad de los asociados. Se han utilizado, a manera de analogía, las novelas 1984 de George Orwell y Un mundo feliz de Aldous Huxley como modelos de una sociedad distópica que han sido llevadas a la práctica por las empresas multinivel.

  4. Representaciones de gladiadores en el Museo Arqueológico Nacional

    Directory of Open Access Journals (Sweden)

    J. M. BLÁZQUEZ

    2009-11-01

    Full Text Available El Museo Arqueológico Nacional de Madrid posee una buena colección de representaciones de gladiadores en terracottas, de la que sólo han sido publicadas dos piezas sin haber sido objeto de estudio particular. Aprovechemos la oportunidad que este estudio nos brinda para agradecer al Excmo. Sr. D. Joaquín M.a de Navascués, director del Museo, las facilidades de todo género dadas para el análisis de estas piezas; así como al restante personal del centro, particularmente a D. A. Fernández de Aviles, colaboración que agradecemos muy sinceramente. También hago público mi gratitud a Don Javier de Navascués, que ha efectuado los dibujos.

  5. Representaciones y sus impactos: el caso de los lacandones en la Selva Lacandona

    Directory of Open Access Journals (Sweden)

    Tim Trench

    2005-02-01

    Full Text Available Las representaciones “positivas” de los lacandones les ofrecen ventajas claras a corto plazo, confiriendo cierto capital simbólico y político en sus relaciones con foráneos y en sus diversas luchas, además de variados beneficios económicos. Pero, a final de cuentas, es cuestionable si su imagen como pueblo “originario” y conservacionista “innato” les ayude en el largo plazo, ya que forma parte de un discurso fundamentalmente colonialista y puede limitar las oportunidades de las comunidades lacandonas a decidir su futuro y definir el carácter de su inserción en la sociedad nacional.

  6. REPRESENTACIONES SOCIALES SOBRE POBREZA EN ESTUDIANTES UNIVERSITARIOS CHILENOS / SOCIAL REPRESENTATIONS OF POVERTY IN UNIVERSITY STUDENTS

    Directory of Open Access Journals (Sweden)

    Marianela Denegri Coria*

    2010-06-01

    Full Text Available RESUMENEl propósito del estudio fue determinar y describir las representaciones sociales de estudiantes universitarios chilenossobre pobreza, sus causas y soluciones. Se empleó la Técnica de Redes Semánticas Naturales (Valdez, 1998, el instrumentose aplicó a 121 estudiantes de las Facultades de Educación y Humanidades y Medicina de la Universidad de La Frontera.Los análisis fueron realizados en base a los valores que arrojan las redes semánticas. Los resultados dan cuenta decontenidos comunes en las representaciones sociales de ambos grupos, matizadas probablemente por la formación académica,observando diferencias en relación a la importancia que asignan a factores de carácter histórico y social. Los hallazgos sediscuten en relación a aspectos estructurales del pensamiento.ABSTRACTThe purpose of the study was to determine and describe the social representations of Chilean university students aboutpoverty, its causes and solutions. We used the technique of semantic network (Valdez, 1998, we applied the instrument to121 students from the Faculties of Education and Humanities and Medicine of the University of La Frontera. The analyseswere carried out based on values of the semantics network. The results indicate common contents in the social representationsof both groups, probably nuanced by academic formation; we observed differences among students groups related to theimportance that they assigned to historic and social factors. We discussed the results about structural aspects thoughts.

  7. UN PROGRAMA PARA CALCULAR LAS REPRESENTACIONES IRREDUCIBLES DE SN, EN LA FORMA SEMINORMAL DE YOUNG 1 MATEMÁTICA COMPUTACIONAL COMO APOYO A LA DOCENCIA

    Directory of Open Access Journals (Sweden)

    Álvaro Duque S.J.

    2002-06-01

    Full Text Available Las matrices de las representaciones irreducibles de un grupo G se usan para el cómputo de la Transformada Generalizada de Fourier de una función definida en G. Existen muchas otras aplicaciones para las representaciones irreducibles de un grupo. Nosotros elaborarnos un software que calcula las matrices de las representacionesirreducibles del grupo simétrico en la forma serninormal de Young. Este programa corre en el Sistema Algebraico Computacional CoCoA.

  8. Dark matter searches with a mono-Z′ jet

    International Nuclear Information System (INIS)

    Bai, Yang; Bourbeau, James; Lin, Tongyan

    2015-01-01

    We study collider signatures of a class of dark matter models with a GeV-scale dark Z ′ . At hadron colliders, the production of dark matter particles naturally leads to associated production of the Z ′ , which can appear as a narrow jet after it decays hadronically. Contrary to the usual mono-jet signal from initial state radiation, the final state radiation of dark matter can generate the signature of a mono-Z ′ jet plus missing transverse energy. Performing a jet-substructure analysis to tag the Z ′ jet, we show that these Z ′ jets can be distinguished from QCD jets at high significance. Compared to mono-jets, a dedicated search for mono-Z ′ jet events can lead to over an order of magnitude stronger bounds on the interpreted dark matter-nucleon scattering cross sections.

  9. New mono-organotin (IV) dithiocarbamate complexes

    International Nuclear Information System (INIS)

    Muthalib, Amirah Faizah Abdul; Baba, Ibrahim

    2014-01-01

    Eighteen new mono-organotin dithiocarbamate compounds derived each nine from methyltin(IV) and phenyltin(IV) reacted using in-situ method with various type of N-dialkylamine together with carbon disulphide with the ratio of 1:3:3. Elemental and gravimetric analysis showed that the general formula of these compounds were RSnCl[S 2 CNR′R″] 2 (R= Ph, CH 3 , R′ = CH 3 , C 2 H 5 , C 7 H 7 and R″ = C 2 H 5 , C 6 H 11 , iC 3 H 7 , C 7 H 7 ). These compounds had been characterized by infrared spectroscopy, ultraviolet spectroscopy, 1 H, 13 C NMR spectroscopy and single crystal X-ray crystallography. The infrared spectra of these compounds showed three important peaks indicating the formation of dithiocarbamate compounds, ν(C N), ν(C S) and ν(Sn-S) band which present in the region of 1444–1519, 954–1098 and 318–349 cm −1 respectively. The ultraviolet-visible spectra showed an absorption band for the π - π* transition of N C S group in the range of 253 – 259 nm due to the intramolecular charge transfer of the ligand. The 13 C NMR spectra showed an important shift for δ(N 13 CS 2 ) in the range of 196.8 – 201.9 ppm.. Single crystal X-ray diffraction studies showed three new structures with the general formula of PhSnCl[S 2 CN(Et)(i−Pr)] 2 , MeSnCl[S 2 CN(Me)(Cy)] 2 and MeSnCl[S 2 CN(i−Pr)(CH 2 Ph)] 2 . All structures having a distorted octahedral geometry set by CClS 4 donor atom from the two chelating dithiocarbamate ligands

  10. Searching for Dark Matter in the Mono-Jet and Mono-Photon Channels with the ATLAS Detector

    CERN Document Server

    Ratti, Maria Giulia; Carminati, Leonardo

    This work presents searches for dark matter particles in the mono-jet and mono-photon final states using the data collected by the ATLAS experiment during 2015 and 2016. The thesis starts with an introduction to the basic concepts of the Standard Model, followed by a discussion of the dark matter problem and the WIMP hypothesis. The focus then shifts to the description of the experimental facilities to collect the data and reconstruct the collision events. Particular focus is put on the reconstruction and performance of the missing transverse momentum. After characterizing a few theoretical models predicting dark matter particles in the mono-photon and mono-jet final states, the searches in these two signatures are thoroughly discussed, with particular focus on the background estimation techniques. While no significant deviations from the Standard Model predictions are found, the results obtained by these searches further restrict the phase-space where the dark matter particles can lie.

  11. Las representaciones sociales: un marco teórico apropiado para abordar la investigación social educativa

    Directory of Open Access Journals (Sweden)

    Elsa María Ortiz Casallas

    2013-01-01

    Full Text Available Este artículo intenta posicionar la teoría de las representaciones sociales como un marco apropiado para abordar la investigación social educativa. Dentro de este marco epistemológico se plantea la importancia de analizar las prácticas de lectura y escritura, en donde maestros y estudiantes, en tanto seres sociales y productores de significaciones, son los actores fundamentales. Para ello, se problematiza la categoría sujeto, seguidamente, se menciona la emergencia de un pensamiento ternario en la investigación social educativa y finalmente se argumenta la pertinencia de la teoría de las representaciones sociales en la investigación educativa sobre lectura y escritura.

  12. Representaciones sociales sobre Universidad pública de estudiantes del centro tutorial San Juan Nepomuceno de la Universidad de Cartagena

    Directory of Open Access Journals (Sweden)

    Zoahamy Ardila Ramos

    2017-08-01

    Full Text Available El presente artículo pretende dar cuenta de los avances del estudio referido a las representaciones sociales sobre universidad pública de estudiantes del centro tutorial San Juan Nepomuceno; de la Universidad de Cartagena (Colombia, las cuales fueron identificadas a través del análisis discursivo, expresado en entrevistas semiestructuradas dirigidas a estos en la etapa de recolección de información primaria; los principales hallazgos dan cuenta de una construcción lingüística acrítica de la categoría: Universidad Pública, evidenciándose representaciones sociales descontextualizadas del enfoque de derecho.

  13. 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.

  14. New mono-organotin (IV) dithiocarbamate complexes

    Energy Technology Data Exchange (ETDEWEB)

    Muthalib, Amirah Faizah Abdul; Baba, Ibrahim [School of Chemical Sciences and Food Technology, Faculty of Science and Technology, Universiti Kebangsaan Malaysia, 43600 Bangi (Malaysia)

    2014-09-03

    Eighteen new mono-organotin dithiocarbamate compounds derived each nine from methyltin(IV) and phenyltin(IV) reacted using in-situ method with various type of N-dialkylamine together with carbon disulphide with the ratio of 1:3:3. Elemental and gravimetric analysis showed that the general formula of these compounds were RSnCl[S{sub 2}CNR′R″]{sub 2} (R= Ph, CH{sub 3}, R′ = CH{sub 3}, C{sub 2}H{sub 5}, C{sub 7}H{sub 7} and R″ = C{sub 2}H{sub 5}, C{sub 6}H{sub 11}, iC{sub 3}H{sub 7}, C{sub 7}H{sub 7}). These compounds had been characterized by infrared spectroscopy, ultraviolet spectroscopy, {sup 1}H, {sup 13}C NMR spectroscopy and single crystal X-ray crystallography. The infrared spectra of these compounds showed three important peaks indicating the formation of dithiocarbamate compounds, ν(CN), ν(CS) and ν(Sn-S) band which present in the region of 1444–1519, 954–1098 and 318–349 cm{sup −1} respectively. The ultraviolet-visible spectra showed an absorption band for the π - π* transition of NCS group in the range of 253 – 259 nm due to the intramolecular charge transfer of the ligand. The {sup 13}C NMR spectra showed an important shift for δ(N{sup 13}CS{sub 2}) in the range of 196.8 – 201.9 ppm.. Single crystal X-ray diffraction studies showed three new structures with the general formula of PhSnCl[S{sub 2}CN(Et)(i−Pr)]{sub 2}, MeSnCl[S{sub 2}CN(Me)(Cy)]{sub 2} and MeSnCl[S{sub 2}CN(i−Pr)(CH{sub 2}Ph)]{sub 2}. All structures having a distorted octahedral geometry set by CClS{sub 4} donor atom from the two

  15. Screening for nonalcoholic steatohepatitis by using cytokeratin 18 and transient elastography in HIV mono-infection.

    Directory of Open Access Journals (Sweden)

    Amine Benmassaoud

    Full Text Available HIV-infected individuals are at high risk of developing nonalcoholic steatohepatitis (NASH, a leading cause of end-stage liver disease in Western countries. Nonetheless, due to the invasiveness of liver biopsy, NASH remains poorly understood in HIV mono-infection. We aimed to characterize the prevalence and predictors of NASH in unselected HIV mono-infected patients by means of non-invasive diagnostic tools.HIV-infected adults without significant alcohol intake or co-infection with hepatitis B or C underwent a routine screening program employing transient elastography (TE with controlled attenuation parameter (CAP and the serum biomarker cytokeratin-18 (CK-18. NASH was diagnosed non-invasively as the coexistence of fatty liver (CAP ≥248 dB/m and CK-18 >246 U/L. Identified cases of NASH were offered a diagnostic liver biopsy. Predictors of NASH were determined by multivariate logistic regression analysis.202 consecutive HIV mono-infected patients were included. NASH was non-invasively diagnosed in 23 cases (11.4%. Among them, 17 underwent a liver biopsy, and histology confirmed NASH in all cases. The prevalence of NASH was higher in patients with hypertriglyceridemia (17.1%, insulin resistance defined by homeostasis model for assessment of insulin resistance (HOMA-IR (25%, those with detectable HIV viral load (42.9% and those with elevated ALT (53.6%. After adjustment, higher HOMA-IR (adjusted odds ratio [aOR] = 1.20, 95% CI 1.01-1.43; p = 0.03 and ALT (aOR = 2.39, 95% CI 1.50-3.79; p<0.001 were independent predictors of NASH.NASH, diagnosed by a non-invasive diagnostic approach employing CK-18 and TE with CAP, is common in unselected HIV mono-infected individuals, particularly in the presence of insulin resistance and elevated ALT.

  16. Representaciones sociales y experiencias de vida cotidiana de los ancianos en la Ciudad de México

    Directory of Open Access Journals (Sweden)

    Martha de Alba González

    2017-01-01

    Full Text Available El presente artículo se sitúa en una perspectiva ecológica del envejecimiento, en la que se considera que este proceso no sólo depende de aspectos psicosociales sino también de la relación que las personas mantienen con su entorno de vida (físico, social, histórico y cultural. El texto tiene como propósito analizar el aspecto subjetivo de la calidad de vida a través del estudio de las representaciones sociales de la ciudad y del barrio o colonia, construidas por una muestra de residentes de cuatro colonias (diferenciadas socioeconómicamente de la Ciudad de México. Es un estudio de corte cualitativo, basado en entrevistas a profundidad y observaciones de campo. Los resultados muestran que las representaciones sociales positivas de la ciudad, asociadas con el apego a la misma y con los espacios que favorecen un envejecimiento activo, contribuyen a proporcionar calidad de vida en la urbe. Por el contrario, las representaciones sociales negativas de la ciudad, vinculadas con problemáticas urbanas, políticas y sociales, generan un sentimiento de fragilidad en los espacios urbanos que disminuye la calidad de vida.

  17. Las representaciones de la tutoría universitaria en profesores y estudiantes: estudio de un caso

    Directory of Open Access Journals (Sweden)

    Clemente Lobato

    2004-01-01

    Full Text Available La concepción y la realización de la tutoría en la universidad de profesores y estudiantes están sujetas a las representaciones sociales que unos y otros construyen sobre esta dimensión educativa. En consecuencia, la oferta y demanda que se establezcan en torno a la tutoría se derivan de unas determinadas representaciones. Presentamos los resultados del análisis de contenido de una encuesta semi-estructurada realizada a alumnos y profesores de nuestra universidad. El proceso de análisis de los datos se ha realizado por medio del programa "NUDIST.4: Análisis de datos cualitativos asistido por ordenador". El sistema de categorías elaborado nos ha permitido determinar las representaciones sociales de la tutoría universitaria, presentes en el universo mental y que explican las conductas del colectivo de profesores y de estudiantes de los primeros años de universidad. A partir de las conclusiones, sugerimos una serie de propuestas orientadas a la mejora de la práctica.

  18. Letras e imágenes: dos casos de mitos y representaciones

    Directory of Open Access Journals (Sweden)

    Daniel Esteban Carmona Rendón

    2012-07-01

    Full Text Available

    Resumen

    Este trabajo se concentra en el uso de la literatura como fuente para el quehacer del historiador y pretende dar algunos visos sobre la determinante importancia de esta para la comprensión de las mentalidades, representaciones e imaginarios de los diferentes períodos. Además de estudiar la influencia del lenguaje en la construcción y deconstrucción de mitos y representaciones que se complementen en torno a una idea.

    Esto se coloca a prueba con dos casos particulares, el primero, Policarpa Salavarrieta, donde busca comparar las representaciones gráficas y escritas de dos momentos de la historia colombiana, alrededor de la heroína, y la significación e intervención que se ejerce sobre ellas. El segundo, trata sobre el proyecto de ciudadano que se propone en Medellín para los años 30’s del siglo xx, estudiando un poco de las contradicciones discursivas que construyen el ideal de ciudadano del mundo en la emergente urbe.

    Finalmente, con este trabajo se propone un diálogo entre las imágenes y las letras, como constructores de nación, memorias, ciudadanías e identidades; buscando desde un ícono que los medios han puesto de moda y terminando en un estudio de caso a través de la construcción de UNA identidad urbana en Medellín.

    Palabras Clave: Identidad; representación; nacionalismo; prefiguración; ciudadanía.

     

    Abstract

     

    This paper focuses on the use of literature as a source for the historian’s task and attempts to give some outlines on the decisive importance of this for understanding attitudes, representations and imaginaries of different periods. Besides, it studies the influence of language in the construction and deconstruction of myths and representations that complement around an idea.

    This is proved with two particular cases; the first one

  19. Representaciones de un mundo complejo: No tinc paraules de Arnal Ballester

    Directory of Open Access Journals (Sweden)

    Estrella Sánchez Marcos

    2010-03-01

    Full Text Available En este artículo se analiza cómo en los libros destinados a niños actúan dos factores, el supuesto de simplicidad y el doble destinatario. En el primero se presupone que el niño no tiene la madurez intelectual de un adulto y por tanto los temas, motivos y representaciones deben ser más simples. No obstante, en los estudios sobre formas de lectura y recepción, los niños se revelan como lectores críticos y sofisticados. El doble destinatario es el niño más el adulto que habitualmente en primeras edades lee el libro con él. Este adulto pasará a un primer plano en ese proceso de comunicación que se establece entre un autor y sus dos destinatarios. A su vez, la industria editorial complace con libros a la carta a ese adulto que selecciona, elige y compra. Todos estos factores colisionan con la necesidad del niño para formar su imaginario simbólico con historias y representaciones complejas. Se plantea así cómo los autores-ilustradores actuales de libros para niños pueden hacer visibles o no esos niveles de profundidad y encontrar en formatos como el álbum ilustrado, vehículos para mostrar significados complejos. Se estudia en detalle No tinc paraules, un libro de Arnal Ballester donde el ilustrador elige motivos como el erotismo, el amor, la reflexión sobre la identidad; convierte al niño en el destinatario principal de una historia que tiene que construir él mismo, y deja que el adulto le acompañe. A través de él se puede demostrar que la experimentación gráfica y las ideas pueden contenerse en el mismo espacio.

  20. Imagen corporal y representaciones alimentarias en mujeres de trece comunidades rurales mexicanas

    Directory of Open Access Journals (Sweden)

    Sara Elena Pérez Gil.

    2018-01-01

    Full Text Available Introducción: Estudios de nutrición en México apuntan en tres direcciones: la obesidad, como un problema de salud pública, particularmente en la población femenina; el aumento de otros padecimientos como anorexia y bulimia; y el incremento de la preocupación por el cuerpo, que lleva a transformar algunas prácticas y representaciones alimentarias no solo en población urbana, sino en mujeres de las zonas rurales. Objetivos: tener un primer acercamiento a la percepción corporal de las mujeres de las zonas rurales, conocer cómo son, cómo se perciben y cómo les gustaría ser, e identificar algunas de sus representaciones alimentarias. Material y Métodos: Se estudiaron 564 mujeres de 13 comunidades rurales, se les pesó y midió, y se les aplicó un cuestionario. Resultados: Según el IMC, 33% de las mujeres fueron clasificadas con normopeso; 9.6% con delgadez; 29.4% con sobrepeso; y 28% con obesidad. Las mujeres se percibieron más delgadas, a diferencia de otras investigaciones, y les gustaría ser más delgadas. Discusión: Se resalta la elevada prevalencia de sobrepeso y obesidad de las mujeres de estas zonas. El “desagrado hacia su cuerpo”, relacionado con el aspecto estético, muestra un aumento en la preocupación por el cuerpo en mujeres de las comunidades rurales. Conclusiones: Se considera que la inclusión de temas como la percepción y el ideal corporal en los programas de alimentación y nutrición es relevante para prevenir trastornos de la alimentación. De igual manera, los significados que tienen para las mujeres el acto de comer o no comer determinados alimentos o productos “buenos para transformar el cuerpo” son centrales para la programación de las acciones o estrategias en este campo.

  1. Representaciones sociales del cuidado: entre las prácticas y la noción de alteridad

    Directory of Open Access Journals (Sweden)

    María Cristina Chardon

    2008-01-01

    Full Text Available El presente trabajo intenta reflexionar acerca de las representaciones sociales como sistemas complejos y abiertos que modelan las relaciones con la sociedad y que, en relación dialéctica, son modeladas por los sistemas socio-histórico-culturales. En el marco de las investigaciones "Representaciones de salud y cuidado en padres y docentes de nivel inicial" y "Salud. Calidad de vida y tercera edad" realizadas respectivamente en la Universidad de Buenos Aires (UBA y la Universidad Nacional de Quilmes (UNQ de la Argentina, hemos encontrado referencias empíricas que nos permiten relacionar ambos temas. Encontramos relaciones entre la construcción del cuidado hacia los otros y hacia sí mismos con la participación ciudadana, ya sea en partidos políticos o bien en organizaciones de la civilidad: sociedades de fomento, clubes o colectivos organizados de manera contingente para la consecución de un beneficio común que autogestivamente peticionan a las autoridades. Los datos aparecen de manera diacrónica en dos investigaciones, una de representaciones de accidentes en la infancia y otra de representaciones de calidad de vida en adultos mayores (65 años y más. Metodología: Se ha trabajado siguiendo el método de asociación de palabras, entrevistas en profundidad, observación participante y entrevistas con informantes claves. Marco teórico: Se viene trabajando con el marco de la teoría de las representaciones sociales de Moscovici - Jodelet en particular - dentro de un marco más amplio del constructivismo. En investigaciones que se vienen realizando desde 1993 acerca de la prevención de accidentes, considerados dentro de una temática más amplia de articulación entre Salud¿Educación, nos interesa todo lo relacionado con la prevención y promoción de la salud.

  2. Representaciones sociales de los alimentos orgánicos entre consumidores de Chiapas

    Directory of Open Access Journals (Sweden)

    Cynthia Gutiérrez Pérez

    2012-01-01

    Full Text Available Ante un modelo intensivo en el uso de agroquímicos y sus consecuencias en la salud y en el medio ambiente, los alimentos orgánicos emergen como una opción de producción sustentable y saludable para los consumidores. Este artículo expone los resultados de un estudio sobre los factores generales que organizan la representación social de los alimentos frescos orgánicos en tres grupos de consumidores en San Cristóbal de Las Casas, Chiapas. El estudio se realizó con dispositivos cuantitativos y cualitativos con 250 consumidores en tres espacios de venta. Los resultados muestran similitudes y diferencias según grupo social estudiado. Los tres casos comparten preocupaciones por la salud las cuales se enmarcan en diversos factores de riesgo. Las diferencias se muestran en cuanto a sus posicionamientos políticos e ideológicos así como por su oportunidad de acceso a los alimentos orgánicos. La escolaridad no fue determinante para diferenciar las representaciones sociales emitidas.

  3. Las representaciones sociales sobre Derechos Humanos en niños de primaria

    Directory of Open Access Journals (Sweden)

    Germán Flores Martínez

    2015-08-01

    Full Text Available La presente investigación tuvo como objetivo principal la exploración y descripción de las representaciones sociales que los niños de educación primaria de quinto grado manifiestan sobre los Derechos Humanos. El estudio, realizado desde un enfoque cualitativo, se llevó a cabo en la Escuela Primaria Rural Emiliano Zapata, de la comunidad de Xochiteotla, Chiutempan, Tlaxcala (México. La población del estudio está conformada por 26 alumnos entre los 11 y 12 años. Los resultados obtenidos demuestran que los niños tienen una visión de los Derechos Humanos construida desde su contexto, y materializada en personas que cumplen con una función social. También los derechos humanos se materializan en objetos y en situaciones de su realidad; tanto en su lenguaje, como en su representación gráfica.

  4. Representaciones sociales del narcotráfico desde la perspectiva de los universitarios de Tijuana

    Directory of Open Access Journals (Sweden)

    Lilian Paola Ovalle

    2005-01-01

    Full Text Available Tijuana es una de las ciudades latinoamericanas que fungen como epicentro de la actividad transnacional del narcotráfico, y el hecho de que en su territorio se manifieste este fenómeno, no sólo influye en el deterioro de su sistema de seguridad pública, sino que tiene implicaciones sociales y culturales que esperan ser estudiadas. En este sentido, en este artículo se aborda el estudio de las representaciones sociales del narcotráfico tomando como unidad de análisis a los jóvenes universitarios. ¿Consideran al narcotráfico un negocio o un crimen? ¿Hasta qué punto lo perciben como una opción laboral válida? ¿Perciben que ha disminuido o ha aumentado en la ciudad? ¿Qué sentimientos se asocian cuando piensan en los narcotraficantes y vendedores de droga: atracción, repulsión, admiración? Todas estas cuestiones y algunas otras son respondidas mediante esta investigación, aportando así al debate que se debe dar para descifrar los sutiles pero fuertes lazos que ha significado el narcotráfico en una ciudad como Tijuana.

  5. El cuerpo de las jóvenes madres solteras universitarias: representaciones y estrategias

    Directory of Open Access Journals (Sweden)

    Rosa María Huerta Mata

    2018-01-01

    Full Text Available Se analizan las estrategias que crean las madres solteras sobre sus cuerpos, así como las representaciones de éstos en la universidad, en el sistema de salud y en las redes de apoyo familiar de las estudiantes universitarias. Para ello realizamos entrevistas en profundidad a 14 docentes y personal administrativo de la Universidad Autónoma de San Luis Potosí entre febrero a mayo del año 2014. Además elaboramos los relatos de vida de ocho jóvenes madres solteras que asisten a la Facultad de Ciencias Químicas. Ingresar en la maternidad como madres solteras no propicia de manera general el ejercicio de agencia sobre los métodos anticonceptivos. Estas jóvenes asumen agencias parciales sobre sus cuerpos en el espacio universitario al presentarse con sus hijos en la universidad. Faltan normativas universitarias que legitimen socialmente a los cuerpos de las madres solteras universitarias. Por otro lado, la relación entre su capacidad de agencia y sus derechos sexuales y reproductivos, no se establece en conocimientos teóricos y conceptuales sino en reflexiones y acciones carentes de un sustento teórico que les permita ejercer con mayor fuerza sus derechos.

  6. Representaciones sociales acerca del narcotráfico en adolescentes de Tamaulipas

    Directory of Open Access Journals (Sweden)

    Ariagor Manuel Almanza Avendaño

    2018-04-01

    Full Text Available El objetivo de este artículo es comprender las representaciones sociales construidas por un grupo de adolescentes del estado de Tamaulipas, acerca del narcotráfico. Se empleó un diseño de estudio de caso intrínseco, y se realizaron entrevistas semiestructuradas para aproximarse al proceso deconstrucción de su representación social. Para analizar el contenido temático se utilizó el programa MAXQDA 11. Los resultados muestran que los adolescentes consideran al narcotráfico como una actividad delictiva, que se ha diversificado para incluir otros delitos asociados con la violencia y el daño a los demás. Es un estudio exploratorio y, pese al número reducido de participantes, recupera las voces de los adolescentes inmersos en comunidades donde hay narcotráfico, sin que participen directamente en él, también da cuenta de que la incorporación de los jóvenes en el narcotráfico se limita cuando lo perciben como un delito, y elaboran su identidad en contraposición a él.

  7. El concepto de ficcionalidad: Teoría y representaciones textuales

    Directory of Open Access Journals (Sweden)

    Álamo Felices, Francisco

    2014-06-01

    Full Text Available This article is an updated tour —scientific, terminological and bibliographical— of the concept of fictionality and its fundamental textual representations. The structure of this article is drawn from a prior state of the issue and moves on to a theoretical exposition of these fictional forms, to which a sampler of narrative examples applied to each of the analyzed narratives is added. All of this is complemented by recent contributions made within the field of fictionality by both literary critics and the novelists themselves.Este trabajo es un recorrido actualizado —científico, terminológico y bibliográfico— acerca del concepto de ficcionalidad y sus representaciones textuales fundamentales. La estructura del artículo se traza desde un estado previo de la cuestión para continuar con una exposición teórica de dichas modalidades ficcionales a lo que se añade un muestrario de ejemplos narrativos aplicados a cada caso analizado. Todo lo anterior se complementa con las últimas aportaciones que, en el campo de la ficcionalidad, han realizado tanto la crítica literaria como los propios novelistas.

  8. Representaciones sociales de la crisis ambiental en futuros profesores de química

    Directory of Open Access Journals (Sweden)

    Yair Alexander Porras Contreras

    2016-06-01

    Full Text Available Resumen La crisis ambiental, como crisis civilizatoria, emerge de las interacciones poco efectivas entre los subsistemas biofísicos, sociales y culturales, constituyéndose en un riesgo global que trasciende el dominio material, para posicionarse en una categoría que involucra el significado y el sentido de la realidad. De esta manera, las ideas, creencias y concepciones que elaboran los profesores en formación inicial sobre la crisis ambiental, se convierten en derroteros desde los cuales se construye su saber pedagógico y su praxis educativa en relación con el ambiente. El propósito del presente artículo consiste en reconocer las representaciones sociales de la crisis ambiental, que circulan en un grupo de profesores en formación inicial de la Licenciatura en Química de la Universidad Pedagógica Nacional de Colombia (UPN, tomando como referente el enfoque estructural de la representación social.

  9. Representaciones Sociales de Ambiente y Sustentabilidad en docentes en formación y en ejercicio

    Directory of Open Access Journals (Sweden)

    Yair Alexander Porras Contreras

    2015-12-01

    Full Text Available El ambiente como un sistema complejo, emerge de las interacciones efectivas entre los subsistemas biofísicos, sociales y culturales, constituyéndose en una representación que trasciende el dominio material, para posicionarse en una categoría que involucra el significado y el sentido de la realidad. De esta manera, las ideas, creencias y concepciones que elaboran los profesores en formación inicial y los profesores en ejercicio sobre el ambiente y la sustentabilidad, se convierten en derroteros sobre los cuales se construye un saber pedagógico y una praxis educativa que entra en relación directa con el ideario de ciudadanía que se promueve en el ámbito escolar. El  propósito del presente artículo consiste en reconocer las representaciones sociales sobre el ambiente y la sustentabilidad que elicitan docentes en ejercicio de Escuelas Normales Superiores y  docentes en formación inicial de la UPN, con el objeto de fomentar una cultura ambiental para la ecociudadanía.

  10. El impacto de las representaciones sociales en la psicología de los conocimientos sociales: problemas y perspectivas The impact of social representations on the psychology of social knowledge: issues and perspectives

    Directory of Open Access Journals (Sweden)

    José Antonio Castorina

    2008-12-01

    Full Text Available Los estudios psicológicos sobre la formación de nociones sociales de los niños se han llevado a cabo en los términos de una actividad intelectual exclusivamente individual y en una secuencia temporal. Se muestran las dificultades de este enfoque, como por ejemplo, que no explican la perduración de nociones "personalizadas" de la historia durante el desarrollo, más allá del avance propiamente conceptual. Se propone utilizar a la teoría de las representaciones sociales, que considera a al niño como un actor social y cuyo foco está en los valores, que no pueden ser organizados en una secuencia lógica. Luego, se examinan los problemas que involucra utilizar las representaciones sociales en la psicología del desarrollo: si su definición es aceptable, si corresponde al orden simbólico y no a una actividad individual; si son irracionales o tienen otra lógica que los conceptos individuales. Finalmente, se aclaran cuáles son las condiciones epistémicas mínimas para establecer un diálogo entre algunos programas de investigación en psicología del conocimiento y la psicología de las representaciones sociales.Psychological studies on the formation of social notions by children have been conducted in terms of an exclusively individual intellectual activity in a time sequence. We show the difficulties of this approach, which does not, for example, explain the persistence of "personalized" notions of history during development, besides actual conceptual advancement. We propose to use the theory of social representations, which considers the child as a social actor and focuses on values, which may not be organized in a logical sequence. We then examine the issues posed by using social representations in developmental psychology: whether its definition is acceptable, whether it corresponds to the symbolic order and not to an individual activity; whether it is irrational or has a logic other than individual concepts. We finally shed light on

  11. Production of mono sugar from acid hydrolysis of seaweed | Jang ...

    African Journals Online (AJOL)

    ... the process conditions for the saccharification of macroalgae (seaweed) into mono sugar using the following parameters such as: Amount of biomass, catalyst concentration, temperature and reaction time. The major component of Ulva pertusa (green seaweed), Laminaria japonica (brown seaweed) and Gelidium amansii ...

  12. Mono- and binuclear complexes of low-valent zirconium

    NARCIS (Netherlands)

    Wielstra, IJtsen

    1990-01-01

    This thesis is a study on the synthesis and reactivity of low-valent zirconium. The investigation can be divided in two parts: the first describes the chemistry of mono-cyclopentadienyl Zr (II) complexes (Chapter II, III and IV), and the second describes some synthetic pathways successfully used for

  13. Cost-Effective Mass Production of Mono Bucket Foundations

    DEFF Research Database (Denmark)

    Gres, Szymon; Nielsen, Søren Andreas; Fejerskov, Morten

    2015-01-01

    for innovative and cost-effective design of Mono Bucket foundations. Established approach merges wind and wave load models, soil/structure interaction topics, structural optimization and installation/fabrication aspects, into software package with ability to perform optimal design of the individual foundations...

  14. Air quality in bedded mono-slope beef barns

    Science.gov (United States)

    Bedded mono-slope barns are becoming more common in the upper Midwest. Because these are new facilities, little research has been published regarding environmental quality, building management and animal performance in these facilities. A team of researchers from South Dakota State University, USDA ...

  15. Mono-fermentation of shea waste in anaerobic digesters - laboratory ...

    African Journals Online (AJOL)

    For the purpose of understanding the characteristics in performance of the shea waste and to provide the necessary input parameters towards the design of biogas plants, mono-fermentation as an option in anaerobic digestion for energy (methane) generation was investigated. Six horizontal reactors with a liquid volume of ...

  16. Representaciones sociales de universitarios sobre la abstinencia sexual y los condones como mecanismos de prevención

    OpenAIRE

    Estupiñán-Aponte, Maria Rosa; Amaya-Estupiñán, Laura; Rojas-Jiménez, Yuri A.

    2013-01-01

    Objetivo Interpretar las representaciones sociales de estudiantes de la Universi­dad Pedagógica y Tecnológica de Colombia, Seccional Sogamoso, frente al uso de la abstinencia sexual y el condón, como referentes estratégicos en la preven­ción de enfermedades de transmisión sexual y embarazo no deseado. Método Mediante muestreo intencional, participaron 67 estudiantes universitarios, entre los 16 y 31 años de edad, procedentes de diferentes regiones del departa­mento de Boyacá. Para la recolecc...

  17. Representaciones sociales de migrantes peruanos sobre su proceso de integración en la ciudad de Santiago de Chile

    OpenAIRE

    Torres G, Osvaldo; Garcés H, Alejandro

    2013-01-01

    El presente artículo busca presentar los resultados de un estudio desarrollado entre los años 2011 y 2012, sobre las representaciones sociales y percepciones de los migrantes peruanos acerca de su proceso de integración en Santiago de Chile, particularmente respecto del acceso a los servicios públicos de educación, salud y vivienda. A partir de una metodología cualitativa, estos servicios son puestos bajo la mirada de los discursos de los migrantes peruanos, develando la discriminación de la ...

  18. Representaciones sobre el aborto : Estudio de jóvenes de sectores pobres de la ciudad de La Plata (2012)

    OpenAIRE

    Caneva, Hernán Andrés

    2012-01-01

    En el presente trabajo se expondrán los avances de un estudio exploratorio de corte cualitativo que estoy realizando con motivo de finalizar mi tesina de grado en la carrera de Lic. Sociología. En dicho estudio me propongo conocer y analizar representaciones acerca del aborto de jóvenes (varones y mujeres) escolarizados de sectores pobres de la ciudad de La Plata durante 2012. La hipótesis de trabajo que orienta el estudio indica que la integración en espacios de socialización tales como l...

  19. Actitudes, concepciones y representaciones sociales de docentes noveles y estudiantes de Magisterio sobre la inclusión educativa

    OpenAIRE

    Gajardo Espinoza, Katherine

    2017-01-01

    La reflexión y acción docente en el aula para el logro de la inclusión educativa se ha erigido como un tema significativo en la investigación educativa. En este eje, estudios importantes han demostrado que las representaciones sociales, concepciones o actitudes de las maestras y maestros sobre la inclusión muchas veces se consideran como barreras contra la plena inclusión en las escuelas (Echeita, 2008). Es por ello que se hace urgente identificar tempranamente estas falsas creencias y ofrece...

  20. Representaciones sociales del rol orientador del docente en estudiantes de educación

    Directory of Open Access Journals (Sweden)

    María Susana Campo-Redondo

    2009-01-01

    Full Text Available Este estudio tuvo como objetivo identificar y analizar las representaciones sociales que tienen los estudiantes de la Escuela de Educación de la Facultad de Humanidades y Educación de la Universidad del Zulia (LUZ, sobre las funciones orientadoras del ejercicio docente. El estudio fue de campo a nivel descriptivo y desde un enfoque cualitativo. La recolección de la información fue mediante la aplicación entrevistas a profundidad a 10 estudiantes de educación de las menciones de Educación Física, Deportes y Recreación (4, Matemática y Física (4 y Biología (2 además del análisis de exámenes escritos de la asignatura "Psicología Educativa" de la mención de matemáticas. El análisis de las informaciones recabadas se realizó mediante la Teoría Fundamentada. Como resultados, se determinó que los estudiantes participantes, tienen una representación del docente con un gran componente de ayuda, caracterizado por la escucha efectiva y el interés por sus alumnos expresado en: la paternalidad, la amistad y el compañerismo, además es un líder que impacta a sus estudiantes y posee una imagen fundamentada en su rol docente y su formación profesional. Por último se proponen algunas recomendaciones en cuanto a la formación de docentes.

  1. Representaciones culturales del proceso enfermedad en pacientes provenientes del area rural

    Directory of Open Access Journals (Sweden)

    Noris Madariaga

    2010-12-01

    Full Text Available El objetivo de esta investigación es conocer las representaciones culturales frente al proceso de enfermedad en los pacientes provenientes del área rural de Norte de Santander, que egresaron del servicio de Urgencias del Hospital Universitario Erasmo Meoz (ESE HUEM. EL estudio es de enfoque cualitativo de abordaje etnográfico. Se definió la muestra de tres informantes, de modo intencional. El método para la recolección de la información que se utilizó en esta investigación fue la observación, las notas de campo y la entrevista a profundidad, que permitió aprender y conocer más a fondo como los pacientes del área rural conceptualizan la experiencia de estar enfermos y cuáles son los cuidados culturales que aplican durante este proceso. Los resultados de esta investigación permitieron observar que la enfermedad es un enemigo común para las personas del área rural y para mantener el equilibrio de la persona con el entorno natural estos pueden a travesar cuatro fases: fase tomásica, fase de rituales culturales, fase auxilio multidisciplinario y fase reestructuración del cuidado. La cultura es definitivamente el juez que califica las acciones de las personas, para unos la enfermedad es un castigo, por el mal comportamiento que han tenido en un momento de su vida y para otros es simplemente una prueba para que Dios perdone sus pecados. Así que el acontecimiento puede ser el mismo pero la cultura transforma la definición del evento.

  2. Estereotipos de género 2.0: Auto-representaciones de adolescentes en Facebook

    Directory of Open Access Journals (Sweden)

    2016-07-01

    Full Text Available Chicas y chicos adolescentes hacen un uso diferente de las redes sociales online, y las chicas presentan un mayor riesgo de verse perjudicadas por un uso no adaptativo. El objetivo de este estudio era investigar en qué medida los adolescentes se presentan en términos de estereotipos de género en sus perfiles de Facebook. Los participantes, 623 usuarios de Facebook de ambos sexos, contestaron el Bem Sex Role Inventory (BSRI y el Personal Well-being Index (PWI. En la primera fase, respondieron sobre cómo ven a un adulto típico en términos de estereotipos de género. En la segunda fase, la mitad de ellos contestó el BSRI en relación a cómo se ven a sí mismos, y la otra mitad cómo se presentan en Facebook. Los resultados muestran que los adolescentes se consideran más sexualmente indiferenciados que un adulto típico de su mismo sexo, tanto en su auto-percepción como en su presentación en Facebook. Se confirma que el bienestar psicológico de las chicas baja considerablemente con la edad, y que está asociado a un mayor grado de masculinidad. Se concluye que los adolescentes producen representaciones verdaderas en sus perfiles de Facebook, y que existe una tendencia hacia una auto-concepción y auto-presentación más sexualmente indiferenciada con una leve preferencia por rasgos masculinos, tanto en chicos como en chicas; además, la masculinidad está asociada a un mayor grado de bienestar psicológico.

  3. Estereotipos publicitarios y representaciones de género en las redes sociales

    Directory of Open Access Journals (Sweden)

    Iolanda Tortajada Giménez

    2013-08-01

    Full Text Available Este artículo presenta los resultados del análisis cuantitativo y cualitativo de las autopresentaciones que los y las adolescentes elaboran para Fotolog. Las imágenes que dichos adolescentes crean y comparten a través de la red están centradas en el sí mismo, y el género y la sexualidad constituyen el eje principal de la representación. Los resultados obtenidos apuntan a que algunas de las categorías que estableció Goffman en su estudio sobre la hiperritualización de la feminidad en la publicidad están presentes en las autopresentaciones analizadas. Además, aparecen otras expresiones de género como la pose lésbica o la erotización de los cuerpos que ya han sido detectadas también en los análisis de la publicidad desarrollados por autoras como Gill. Si bien estas imágenes reproducen estereotipos de género y patrones patriarcales, hay que destacar la presencia de un repertorio variado y algunas creaciones originales, resultado de la negociación identitaria que, respecto al género y a la sexualidad, tiene lugar en estos espacios y otras prácticas mediáticas adolescentes. Para evitar una reproducción irreflexiva de patrones de género estereotipados y contribuir a una negociación crítica de estas representaciones sería importante que la educación mediática tuviera en cuenta la manera en que las prácticas adolescentes en las redes sociales se están nutriendo de otros consumos mediáticos y cómo esto afecta a lo que los y las adolescentes expresan en las redes.

  4. Substituent effects on mono-substituted and poly-substituted nitriles; Efeitos dos substituintes em nitrilas mono- e polissubstituidas

    Energy Technology Data Exchange (ETDEWEB)

    Sofia, Raquel C.R.; Carneiro, Paulo I.B.; Rittner, Roberto [Universidade Estadual de Campinas, SP (Brazil). Inst. de Quimica; Fabi, Marino T [Rhodia S.A., Sao Paulo, SP (Brazil)

    1992-12-31

    This work studies various mono substituted aliphatic nitriles, Y C H{sub 2} (Y=H, F, Cl, Br, I, OMe, S Me, SEt{sub 2}, Me and Ph), and some reference nitriles (Y=Et, n-Pr, n-Bu, n-Am, n-Hex and n-Hept) 12 refs., 3 tabs.

  5. Mono Lake sediments preserve a record of recent environmental change

    Science.gov (United States)

    Meixnerova, J.; Betts, M.; Westacott, S.; Ingalls, M.; Miller, L. G.; Sessions, A. L.; Trower, L.; Geobiology Course, A.

    2017-12-01

    Modern Mono Lake is a geochemically unique closed-basin, hypersaline soda lake. Since 1941, anthropogenic water diversions have decreased the lake's volume and water level, driving changes in water chemistry and ecology. Mono Lake sediments offer an opportunity to investigate the nature and extent of these changes. We analyzed a 70 cm sediment core from the center of Mono Lake recording the past 116 years of deposition. At the time of recovery, the entire core was dark green. 16S rRNA gene analysis indicated a sedimentary bacterial community dominated by Cyanobacteria. SEM imaging revealed abundant, well-preserved diatom frustules below 10 cm core depth, in contrast they are nearly absent above 10 cm depth. Fatty acid (FAME) biomarkers for diatoms and algal sterols were present throughout the core in varying concentrations. Phytol was exceptionally abundant in the core; ratios of phytol/C-18 FAME were commonly >200. The δ13Corg ranged between -17.5 and -20‰ in the lower 52 cm of the core while the upper part shows significant decrease of δ13Corg to -28‰. We interpret the shift in δ13Corg as an ecological transition from mainly diatoms in the lower core towards the green alga Picocystis, which is the main primary producer today and has a δ13Corg value of -32.5‰. The onset of this change dates back 23 years, which roughly coincides with the highest reported salinity, 88 g/L in 1995. We hypothesize that diatoms gradually became marginalized as a result of hypersaline conditions. We also observed a variety of trends that may be characterized as unique fingerprints of Mono Lake. The unusually high abundance of phytol was consistent with the core's pervasive green coloring and could potentially indicate a higher preservation potential of phytol under alkaline conditions. Throughout the core, δ15Norg fluctuated between +10 and +13‰. Such atypical enrichment in δ15Norg could be explained by NH4 dissociation and subsequent NH3 volatilization under high p

  6. Estudio multidimensional de las representaciones mentales de los estudiantes. Aplicación al concepto de respiración

    Directory of Open Access Journals (Sweden)

    Oscar Eugenio Tamayo Alzate

    2003-01-01

    Full Text Available Se realizó el estudio de las representaciones mentales de 21 estudiantes de 17-18 años (primero de bachillerato del sistema educativo español sobre el concepto de respiración. Para su estudio se realizaron análisis orientados a lograr un mejor conocimiento de los aspectos epistemológicos, ontológicos y cognitivo-lingüísticos de los estudiantes; la integración de estas tres dimensiones de análisis nos llevo a construir representaciones mentales multidimensionales sobre el concepto de respiración. Desde la perspectiva epistemológica se ubicaron los textos escritos por los alumnos según los diferentes paradigmas explicativos de la respiración; el análisis ontológico nos llevo a identificar las principales concepciones de los estudiantes sobre el concepto analizado; el análisis cognitivo-lingüístico nos permitió conocer el tipo de discurso elaborado por los estudiantes así como su contenido y coherencia. En su conjunto el análisis multidimensional nos permitió identificar algunos obstáculos para el aprendizaje del concepto de respiración en el grupo estudiado

  7. Representaciones mentales sobre la ley en infantes y adolescentes. Revisión de estudios psicogenéticos

    Directory of Open Access Journals (Sweden)

    Leonardo Yovany Álvarez-Ramírez

    2013-03-01

    Full Text Available Para el presente trabajo nos propusimos como objetivo establecer las tendencias y limitaciones de los resultados de los estudios epigenéticos sobre las representaciones mentales de la ley, en sujetos entre los 7 y los 17 años de edad. Utilizamos la técnica de revisión documental con búsquedas en bases de datos científicas de Psicología, que arrojó 104 referencias de las cuales 78 hicieron parte del estudio. Los hallazgos muestran que la perspectiva epigenética postula tres niveles de comprensión de la ley en muestras europeas, australianas, americanas y minoritariamente latinoamericanas, en las que esta depende de la comprensión de otras representaciones mentales como las de comunidad, organización social, Estado y nación, y en donde se avanza desde una concepción gobiernista presidencialista a una de gobernanza, en la edad adolescente tardía.

  8. Representaciones mentales sobre la ley en infantes y adolescentes. Revisión de estudios psicogenéticos

    Directory of Open Access Journals (Sweden)

    Leonardo Yovany Álvarez-Ramírez

    2013-01-01

    Full Text Available Para el presente trabajo nos propusimos como objetivo establecer las tendencias y limitaciones de los resultados de los estudios epigenéticos sobre las representaciones mentales de la ley, en sujetos entre los 7 y los 17 años de edad. Utilizamos la técnica de revisión documental con búsquedas en bases de datos científicas de Psicología, que arrojó 104 referencias de las cuales 78 hicieron parte del estudio. Los hallazgos muestran que la perspectiva epigenética postula tres niveles de comprensión de la ley en muestras europeas, australianas, americanas y minoritariamente latinoamericanas, en las que esta depende de la comprensión de otras representaciones mentales como las de comunidad, organización social, Estado y nación, y en donde se avanza desde una concepción gobiernista presidencialista a una de gobernanza, en la edad adolescente tardía.

  9. El sexo es bueno, pero no puedo: representaciones de mujeres y hombres con heridas crónicas

    Directory of Open Access Journals (Sweden)

    Evanilda Souza de Santana Carvalho

    2013-09-01

    Full Text Available Objetivo principal: Aprehender y analizar las representaciones sociales sobre el sexo, elaboradas por mujeres y hombres crónicamente heridos. Metodología: Estudio cualitativo. Análisis de contenido temático a partir de la aplicación del Test de Asociación Libre de Palabras y de Entrevistas en semi-estructuradas. Resultados principales: Surgieron tres categorías de análisis: el sexo es bueno y hace bien a la salud, el sexo puede empeorar la herida y el sexo es algo prohibido. Se concluye que las personas con heridas crónicas tienden a abstenerse de mantener relaciones sexuales por creer que podría conllevar implicaciones negativas para su salud y vitalidad. Conclusión principal: El personal de enfermería puede intervenir a través de la escucha terapéutica en la reelaboración de estas representaciones, desmitificando tabúes que comprometan la satisfacción de las necesidades sexuales de estas personas y su calidad de vida.

  10. Impacto de las TIC en las representaciones sociales de los docentes en la modalidad b-learning

    Directory of Open Access Journals (Sweden)

    José Eduardo Padilla Beltrán

    2017-01-01

    Full Text Available Este artículo resultado de investigación da cuenta del sentido, alcance e impacto que tienen las tecnologías de la información y la comunicación (TIC en la configuración de aquellas representaciones sociales de los docentes que gestionan y orientan procesos de formación en la modalidad b-learning en educación superior. Mediante entrevistas semiestructuradas, la configuración de los resultados se desarrolló por medio de la triangulación hermenéutica como proceso metodológico, y desde esta se analizó el impacto de las TIC en dichas representaciones sociales desde un enfoque de la pedagogía sociocrítica. Se concluye que la modalidad b-learning requiere una fundamentación conceptual y epistemológica propia, más allá de su operatividad, es decir, lejos está de comprenderse como una simple mediación tecnológica del conocimiento y del aprendizaje.

  11. Studies of mono-crystalline CVD diamond pixel detectors

    CERN Document Server

    Bartz, E; Atramentov, O; Yang, Z; Hall-Wilton, R; Schnetzer, S; Patel, R; Bugg, W; Hebda, P; Halyo, V; Hunt, A; Marlow, D; Steininger, H; Ryjov, V; Hits, D; Spanier, S; Pernicka, M; Johns, W; Doroshenko, J; Hollingsworth, M; Harrop, B; Farrow, C; Stone, R

    2011-01-01

    The Pixel Luminosity Telescope (PLT) is a dedicated luminosity monitor, presently under construction, for the Compact Muon Solenoid (CMS) experiment at the Large Hadron Collider (LHC). It measures the particle flux in several three layered pixel diamond detectors that are aligned precisely with respect to each other and the beam direction. At a lower rate it also performs particle track position measurements. The PLTs mono-crystalline CVD diamonds are bump-bonded to the same readout chip used in the silicon pixel system in CMS. Mono-crystalline diamond detectors have many attributes that make them desirable for use in charged particle tracking in radiation hostile environments such as the LHC. In order to further characterize the applicability of diamond technology to charged particle tracking we performed several tests with particle beams that included a measurement of the intrinsic spatial resolution with a high resolution beam telescope. Published by Elsevier B.V.

  12. Humanos salvajes y monos altruistas. Reflexiones sobre Darwin

    Directory of Open Access Journals (Sweden)

    Jorge Martinez Contreras

    2009-10-01

    Full Text Available RESUMEN   Darwin propuso en 1871 que preferiría descender de un mono que de los “salvajes”. El mono es un babuino hamadryas que, en un relato de Brehm, salva a un infante de una jauría. Los “salvajes” son los fueguinos a los que visitó en los años 1830. ¿Por qué Darwin fue tan buen observador del comportamiento animal y por qué no dudo discernir en qué consistía la sociedad de cazadores-recolectores de los cuatro grupos de Tierra del Fuego?. Esto es lo que tratamos de dilucidar en este trabajo.   Palabras clave: Darwin, fueguinos, hamadryas, altruismo, egoísmo.

  13. Studies of mono-crystalline CVD diamond pixel detectors

    Energy Technology Data Exchange (ETDEWEB)

    Bugg, W. [University of Tennessee, Knoxville (United States); Hollingsworth, M., E-mail: mhollin3@utk.edu [University of Tennessee, Knoxville (United States); Spanier, S.; Yang, Z. [University of Tennessee, Knoxville (United States); Bartz, E.; Doroshenko, J.; Hits, D.; Schnetzer, S.; Stone, R.; Atramentov, O.; Patel, R.; Barker, A. [Rutgers University, Piscataway (United States); Hall-Wilton, R.; Ryjov, V.; Farrow, C. [CERN, Geneva (Switzerland); Pernicka, M.; Steininger, H. [HEPHY, Vienna (Austria); Johns, W. [Vanderbilt University, Nashville (United States); Halyo, V.; Harrop, B. [Princeton University, Princeton (United States); and others

    2011-09-11

    The Pixel Luminosity Telescope (PLT) is a dedicated luminosity monitor, presently under construction, for the Compact Muon Solenoid (CMS) experiment at the Large Hadron Collider (LHC). It measures the particle flux in several three layered pixel diamond detectors that are aligned precisely with respect to each other and the beam direction. At a lower rate it also performs particle track position measurements. The PLT's mono-crystalline CVD diamonds are bump-bonded to the same readout chip used in the silicon pixel system in CMS. Mono-crystalline diamond detectors have many attributes that make them desirable for use in charged particle tracking in radiation hostile environments such as the LHC. In order to further characterize the applicability of diamond technology to charged particle tracking we performed several tests with particle beams that included a measurement of the intrinsic spatial resolution with a high resolution beam telescope.

  14. Modification and performance evaluation of a mono-valve engine

    Science.gov (United States)

    Behrens, Justin W.

    A four-stroke engine utilizing one tappet valve for both the intake and exhaust gas exchange processes has been built and evaluated. The engine operates under its own power, but has a reduced power capacity than the conventional 2-valve engine. The reduction in power is traced to higher than expected amounts of exhaust gases flowing back into the intake system. Design changes to the cylinder head will fix the back flow problems, but the future capacity of mono-valve engine technology cannot be estimated. The back flow of exhaust gases increases the exhaust gas recirculation (EGR) rate and deteriorates combustion. Intake pressure data shows the mono-valve engine requires an advanced intake valve closing (IVC) time to prevent back flow of charge air. A single actuation camshaft with advanced IVC was tested in the mono-valve engine, and was found to improve exhaust scavenging at TDC and nearly eliminated all charge air back flow at IVC. The optimum IVC timing is shown to be approximately 30 crank angle degrees after BDC. The mono-valve cylinder head utilizes a rotary valve positioned above the tappet valve. The open spaces inside the rotary valveand between the rotary valve and tappet valve represent a common volume that needs to be reduced in order to reduce the base EGR rate. Multiple rotary valve configurations were tested, and the size of the common volume was found to have no effect on back flow but a direct effect on the EGR rate and engine performance. The position of the rotary valve with respect to crank angle has a direct effect on the scavenging process. Optimum scavenging occurs when the intake port is opened just after TDC.

  15. Fatigue Analysis of a Mono-Tower Platform

    DEFF Research Database (Denmark)

    Kirkegaard, Poul Henning; Sørensen, John Dalsgaard; Brincker, Rune

    In this paper, a fatigue reliability analysis of a Mono-tower platform is presented. The failure mode, fatigue failure in the butt welds, is investigated with two different models. The one with the fatigue strength expressed through SN relations, the other with the fatigue strength expressed thro...... of the natural period, damping ratio, current, stress Spectrum and parameters describing the fatigue strength. Further, soil damping is shown to be significant for the Mono-tower.......In this paper, a fatigue reliability analysis of a Mono-tower platform is presented. The failure mode, fatigue failure in the butt welds, is investigated with two different models. The one with the fatigue strength expressed through SN relations, the other with the fatigue strength expressed...... through linear-elastic fracture mechanics (LEFM). In determining the cumulative fatigue damage, Palmgren-Miner's rule is applied. Element reliability as well as systems reliability is estimated using first-order reliability methods (FORM). The sensitivity of the systems reliability to various parameters...

  16. Fatigue Reliability Analysis of a Mono-Tower Platform

    DEFF Research Database (Denmark)

    Kirkegaard, Poul Henning; Sørensen, John Dalsgaard; Brincker, Rune

    1991-01-01

    In this paper, a fatigue reliability analysis of a Mono-tower platform is presented. The failure mode, fatigue failure in the butt welds, is investigated with two different models. The one with the fatigue strength expressed through SN relations, the other with the fatigue strength expressed thro...... of the natural period, damping ratio, current, stress spectrum and parameters describing the fatigue strength. Further, soil damping is shown to be significant for the Mono-tower.......In this paper, a fatigue reliability analysis of a Mono-tower platform is presented. The failure mode, fatigue failure in the butt welds, is investigated with two different models. The one with the fatigue strength expressed through SN relations, the other with the fatigue strength expressed...... through linear-elastic fracture mechanics (LEFM). In determining the cumulative fatigue damage, Palmgren-Miner's rule is applied. Element reliability, as well as systems reliability, is estimated using first-order reliability methods (FORM). The sensitivity of the systems reliability to various parameters...

  17. Seasonality of cavitation and frost fatigue in Acer mono Maxim.

    Science.gov (United States)

    Zhang, Wen; Feng, Feng; Tyree, Melvin T

    2017-12-08

    Although cavitation is common in plants, it is unknown whether the cavitation resistance of xylem is seasonally constant or variable. We tested the changes in cavitation resistance of Acer mono before and after a controlled cavitation-refilling and freeze-thaw cycles for a whole year. Cavitation resistance was determined from 'vulnerability curves' showing the percent loss of conductivity versus xylem tension. Cavitation fatigue was defined as a reduction of cavitation resistance following a cavitation-refilling cycle, whereas frost fatigue was caused by a freeze-thaw cycle. A. mono developed seasonal changes in native embolisms; values were relatively high during winter but relatively low and constant throughout the growing season. Cavitation fatigue occurred and changed seasonally during the 12-month cycle; the greatest fatigue response occurred during summer and the weakest during winter, and the transitions occurred during spring and autumn. A. mono was highly resistant to frost damage during the relatively mild winter months; however, a quite different situation occurred during the growing season, as the seasonal trend of frost fatigue was strikingly similar to that of cavitation fatigue. Seasonality changes in cavitation resistance may be caused by seasonal changes in the mechanical properties of the pit membranes. © 2017 John Wiley & Sons Ltd.

  18. Bajo vientre: Representaciones de la sexualidad en la cultura y el arte contemporáneo. El arte impuro: Entre lo público y lo privado

    OpenAIRE

    Cuéllar, Carlos A.

    1998-01-01

    Cuéllar, CA. (1998). Bajo vientre: Representaciones de la sexualidad en la cultura y el arte contemporáneo. El arte impuro: Entre lo público y lo privado. Banda aparte. (11):89-89. http://hdl.handle.net/10251/43155. 89 89 11

  19. Reconstruction of mono-vacancies in carbon nanotubes: Atomic relaxation vs. spin polarization

    Energy Technology Data Exchange (ETDEWEB)

    Berber, S. [Institute of Physics, University of Tsukuba, 1-1-1 Tennodai, Tsukuba 305-8571 (Japan)]. E-mail: berber@comas.frsc.tsukuba.ac.jp; Oshiyama, A. [Institute of Physics, University of Tsukuba, 1-1-1 Tennodai, Tsukuba 305-8571 (Japan)

    2006-04-01

    We have investigated the reconstruction of mono-vacancies in carbon nanotubes using density functional theory (DFT) geometry optimization and electronic structure calculations, employing a numerical basis set. We considered mono-vacancies in achiral nanotubes with diameter range {approx}4-9A. Contrary to previous tight-binding calculations, our results indicate that mono-vacancies could have several metastable geometries, confirming the previous plane-wave DFT results. Formation energy of mono-vacancies is 4.5-5.5eV, increasing with increasing tube diameter. Net magnetic moment decreases from ideal mono-vacancy value after reconstruction, reflecting the reduction of the number of dangling bonds. In spite of the existence of a dangling bond, ground state of mono-vacancies in semiconducting tubes have no spin polarization. Metallic carbon nanotubes show net magnetic moment for most stable structure of mono-vacancy, except for very small diameter tubes.

  20. Reconstruction of mono-vacancies in carbon nanotubes: Atomic relaxation vs. spin polarization

    International Nuclear Information System (INIS)

    Berber, S.; Oshiyama, A.

    2006-01-01

    We have investigated the reconstruction of mono-vacancies in carbon nanotubes using density functional theory (DFT) geometry optimization and electronic structure calculations, employing a numerical basis set. We considered mono-vacancies in achiral nanotubes with diameter range ∼4-9A. Contrary to previous tight-binding calculations, our results indicate that mono-vacancies could have several metastable geometries, confirming the previous plane-wave DFT results. Formation energy of mono-vacancies is 4.5-5.5eV, increasing with increasing tube diameter. Net magnetic moment decreases from ideal mono-vacancy value after reconstruction, reflecting the reduction of the number of dangling bonds. In spite of the existence of a dangling bond, ground state of mono-vacancies in semiconducting tubes have no spin polarization. Metallic carbon nanotubes show net magnetic moment for most stable structure of mono-vacancy, except for very small diameter tubes

  1. Menopausia: representaciones sociales y prácticas Social representations and practices of menopause

    Directory of Open Access Journals (Sweden)

    Blanca Pelcastre-Villafuerte

    2001-10-01

    Full Text Available Objetivo. Caracterizar los significados que se atribuyen al proceso de la menopausia como una primera aproximación al mundo representacional de este evento. Material y métodos. Estudio cualitativo, hecho entre septiembre y octubre de 1998 con 20 mujeres de entre 45 y 65 años de edad, residentes en los municipios de Cuernavaca y Emiliano Zapata del estado de Morelos, México. Se efectuaron sendas entrevistas a profundidad, utilizando una guía con los siguientes apartados: datos sociodemográficos, diagnóstico, sentimientos y sensaciones, cambios en el estilo de vida, cambios fisiológicos e información. Resultados. Se halla una representación que se construye alrededor de la menopausia en términos de cese de la fertilidad y entrada al envejecimiento. Esta caracterización tiene que ver también con otras construcciones como la concepción de la mujer, del cuerpo y de la sexualidad. Conclusiones. En este artículo se retoman principalmente los resultados con relación a las prácticas de las mujeres como consecuencia de la vivencia que tienen de la menopausia, entre las que sobresale la visita al médico. Se discuten las implicaciones desde el marco de la construcción social de los significados. El texto completo en inglés de este artículo está disponible en: http://www.insp.mx/salud/index.htmlObjective. To characterize the meanings attributed to menopause, as a first approximation to the representational world of this event. Material and Methods. A qualitative study was conducted between September and Octuber 1998, in twenty women aged 45-65 years, residents of Cuernavaca and Emiliano Zapata, municipalities of Morelos state, Mexico. Twenty in-depth interviews were conducted using a guide, to collect data on sociodemographic variables, diagnosis, feelings and emotions, changes in life style, and physiological changes. Results. Findings show that menopause is represented as the end of fertility and the beginning of old age

  2. Genetic structure and hierarchical population divergence history of Acer mono var. mono in South and Northeast China.

    Directory of Open Access Journals (Sweden)

    Chunping Liu

    Full Text Available Knowledge of the genetic structure and evolutionary history of tree species across their ranges is essential for the development of effective conservation and forest management strategies. Acer mono var. mono, an economically and ecologically important maple species, is extensively distributed in Northeast China (NE, whereas it has a scattered and patchy distribution in South China (SC. In this study, the genetic structure and demographic history of 56 natural populations of A. mono var. mono were evaluated using seven nuclear microsatellite markers. Neighbor-joining tree and STRUCTURE analysis clearly separated populations into NE and SC groups with two admixed-like populations. Allelic richness significantly decreased with increasing latitude within the NE group while both allelic richness and expected heterozygosity showed significant positive correlation with latitude within the SC group. Especially in the NE region, previous studies in Quercus mongolica and Fraxinus mandshurica have also detected reductions in genetic diversity with increases in latitude, suggesting this pattern may be common for tree species in this region, probably due to expansion from single refugium following the last glacial maximum (LGM. Approximate Bayesian Computation-based analysis revealed two major features of hierarchical population divergence in the species' evolutionary history. Recent divergence between the NE group and the admixed-like group corresponded to the LGM period and ancient divergence of SC groups took place during mid-late Pleistocene period. The level of genetic differentiation was moderate (FST  = 0.073; G'ST  = 0.278 among all populations, but significantly higher in the SC group than the NE group, mirroring the species' more scattered distribution in SC. Conservation measures for this species are proposed, taking into account the genetic structure and past demographic history identified in this study.

  3. Genetic structure and hierarchical population divergence history of Acer mono var. mono in South and Northeast China.

    Science.gov (United States)

    Liu, Chunping; Tsuda, Yoshiaki; Shen, Hailong; Hu, Lijiang; Saito, Yoko; Ide, Yuji

    2014-01-01

    Knowledge of the genetic structure and evolutionary history of tree species across their ranges is essential for the development of effective conservation and forest management strategies. Acer mono var. mono, an economically and ecologically important maple species, is extensively distributed in Northeast China (NE), whereas it has a scattered and patchy distribution in South China (SC). In this study, the genetic structure and demographic history of 56 natural populations of A. mono var. mono were evaluated using seven nuclear microsatellite markers. Neighbor-joining tree and STRUCTURE analysis clearly separated populations into NE and SC groups with two admixed-like populations. Allelic richness significantly decreased with increasing latitude within the NE group while both allelic richness and expected heterozygosity showed significant positive correlation with latitude within the SC group. Especially in the NE region, previous studies in Quercus mongolica and Fraxinus mandshurica have also detected reductions in genetic diversity with increases in latitude, suggesting this pattern may be common for tree species in this region, probably due to expansion from single refugium following the last glacial maximum (LGM). Approximate Bayesian Computation-based analysis revealed two major features of hierarchical population divergence in the species' evolutionary history. Recent divergence between the NE group and the admixed-like group corresponded to the LGM period and ancient divergence of SC groups took place during mid-late Pleistocene period. The level of genetic differentiation was moderate (FST  = 0.073; G'ST  = 0.278) among all populations, but significantly higher in the SC group than the NE group, mirroring the species' more scattered distribution in SC. Conservation measures for this species are proposed, taking into account the genetic structure and past demographic history identified in this study.

  4. Genetic Structure and Hierarchical Population Divergence History of Acer mono var. mono in South and Northeast China

    Science.gov (United States)

    Shen, Hailong; Hu, Lijiang; Saito, Yoko; Ide, Yuji

    2014-01-01

    Knowledge of the genetic structure and evolutionary history of tree species across their ranges is essential for the development of effective conservation and forest management strategies. Acer mono var. mono, an economically and ecologically important maple species, is extensively distributed in Northeast China (NE), whereas it has a scattered and patchy distribution in South China (SC). In this study, the genetic structure and demographic history of 56 natural populations of A. mono var. mono were evaluated using seven nuclear microsatellite markers. Neighbor-joining tree and STRUCTURE analysis clearly separated populations into NE and SC groups with two admixed-like populations. Allelic richness significantly decreased with increasing latitude within the NE group while both allelic richness and expected heterozygosity showed significant positive correlation with latitude within the SC group. Especially in the NE region, previous studies in Quercus mongolica and Fraxinus mandshurica have also detected reductions in genetic diversity with increases in latitude, suggesting this pattern may be common for tree species in this region, probably due to expansion from single refugium following the last glacial maximum (LGM). Approximate Bayesian Computation-based analysis revealed two major features of hierarchical population divergence in the species’ evolutionary history. Recent divergence between the NE group and the admixed-like group corresponded to the LGM period and ancient divergence of SC groups took place during mid-late Pleistocene period. The level of genetic differentiation was moderate (FST = 0.073; G′ST = 0.278) among all populations, but significantly higher in the SC group than the NE group, mirroring the species’ more scattered distribution in SC. Conservation measures for this species are proposed, taking into account the genetic structure and past demographic history identified in this study. PMID:24498039

  5. Representaciones sociales de padres de adolescentes sobre la sexualidad en San José de Cúcuta, Colombia 2015

    Directory of Open Access Journals (Sweden)

    Oriana M. Chacón Lizarazo

    2015-12-01

    Full Text Available RESUMEN En el artículo da una mirada sobre las representaciones sociales que tienen los padres con hijos adolescentes sobre sexualidad, teniendo en cuenta que la sexualidad por ser un tema importante en la vida del ser humano, se adhiere o no de forma precisa en la etapa de la adolescencia, contara con dos fases, la primera fase de la investigación se llevó a cabo por medio de dos aplicaciones en dos contextos diferentes con 16 participantes entre ellos 8 padres de familia y 8 adolescentes de edades entre 12 y 17 años de edad, residentes en San José de Cúcuta, donde se aplicó entrevista semi-estructurada, grupo focal y diario de campo. En los resultados obtenidos se logró identificar que las representaciones sociales por parte de los padres acerca de la sexualidad, no son claras, persiste el desconocimiento en los temas y cohibiciones al hablar con sus hijos, de igual forma se evidencia que las representaciones si influyen de cierta manera en la vida sexual de sus hijos, pues ellos infieren un desconocimiento total del tema y no tienen noción de un guía que los pueda orientar pues la información recibida sobre sexualidad es insuficiente. Lo encontrado en la primera fase, permitirá profundizar aspectos relevantes y de importancia en la aplicación de instrumentos que se realizara en la segunda fase. ABSTRACT In the article looks on the social representations of parents with teens about sexuality, considering sexuality as an important in human life issue, adheres or not precisely on the stage adolescence, will have two phases, the first phase of the research was carried out by two applications in two different contexts with 16 participants including 8 parents and 8 adolescents aged between 12 and 17 years old living in San Jose de Cucuta, where semi-structured interviews, focus groups and field diary was applied. In the results it was possible to identify the social representations of parents about sexuality, are not clear, ignorance

  6. Turismo literario, ambientes históricos y “santandereanidad”: representaciones narrativas sobre el territorio santandereano

    Directory of Open Access Journals (Sweden)

    Luis Rubén Pérez Pinzón

    2017-01-01

    Full Text Available El turismo literario es un campo emergente de la geografía humana y de la historia cultural que redescubre los espacios más significativos de cada territorio por medio de las representaciones narrativas sobre los mismos. Como producto de investigación, el artículo presenta los resultados obtenidos a partir de la crítica de fuentes y el análisis de discurso en doscientas obras literarias que centran su atención en el territorio de Santander (Colombia, durante la primera mitad del siglo xx . Se demuestra así que la construcción del imaginario de “santandereanidad” se asocia con una vasta tradición literaria y está relacionada con la creación de nuevos espacios de identidad y recreación colectiva, como el Parque Nacional del Chicamocha (Panachi.

  7. Apuntes para una historia de las representaciones de una naturaleza y cuerpos abyectos: Virreinato del Perú, siglo XVI

    OpenAIRE

    Elizabeth Mejías Navarrete

    2009-01-01

    Este artículo analiza los discursos y representaciones desplegadas en torno a las enfermedades atribuidas a los indígenas circunscritos al Virreinato del Perú para el período 1570-1600 en las Relaciones Geográficas de Indias y algunos tratados médicos relevantes de la época. Considerando el contexto de dominación colonial en que estas descripciones fueron elaboradas, es factible señalar que expresan algo más que una preocupación "científico-médica" o sanitaria, en la medida en que aludirían a...

  8. Representaciones de la pobreza y la desigualdad social en la narrativa costarricense de la Generación del 40

    Directory of Open Access Journals (Sweden)

    Ruth Cubillo Paniagua

    2016-01-01

    Full Text Available En este artículo se analizan las representaciones de la pobreza y la desigualdad social en los textos narrativos (en particular las novelas producidos por una parte de la llamada Generación del 40: aquella que se interesa por representar en su literatura una perspectiva social y realista. Así pues, se analizan algunas novelas de tres destacados narradores ubicados por la historiografía literaria en esta generación: Adolfo Herrera García, con su novela Juan Varela; Carlos Luis Fallas, con sus novelas Mamita Yunai, Gentes y gentecillas y Marcos Ramírez; y Fabián Dobles, con sus novelas Ese que llaman pueblo y El sitio de las abras.

  9. Representaciones, turismo y Estado. Imágenes y discursos en torno de los paisajes culturales de Mendoza (Argentina

    Directory of Open Access Journals (Sweden)

    Cecilia Raffa

    2012-01-01

    Full Text Available En los últimos años, la provincia de Mendoza ha logrado consolidarse como uno de los principales destinos turísticos de Argentina: su paisaje la ha posicionado como lugar elegido por los turistas tanto nacionales como extranjeros. El trabajo que presentamos se propone refl exionar sobre los procesos dominantes que impulsaron la construcción del paisaje de la capital provincial, a través de la acción pública promovida por el Estado. Se analizan los procesos que los conducen, los actores que los encarnan y las imágenes resultantes que dan origen a la vez que nutren y renuevan las representaciones sociales sobre una ciudad que encuentra la clave de su identidad y gran parte de su desarrollo turístico, en el control y uso del agua.

  10. Turismo literario, ambientes históricos y “santandereanidad”: representaciones narrativas sobre el territorio santandereano

    Directory of Open Access Journals (Sweden)

    Luis Rubén Pérez Pinzón

    2017-07-01

    Full Text Available El turismo literario es un campo emergente de la geografía humana y de la historia cultural que redescubre los espacios más significativos de cada territorio por medio de las representaciones narrativas sobre los mismos. Como producto de investigación, el artículo presenta los resultados obtenidos a partir de la crítica de fuentes y el análisis de discurso en doscientas obras literarias que centran su atención en el territorio de Santander (Colombia, durante la primera mitad del siglo XX. Se demuestra así que la construcción del imaginario de “santandereanidad” se asocia con una vasta tradición literaria y está relacionada con la creación de nuevos espacios de identidad y recreación colectiva, como el Parque Nacional del Chicamocha (Panachi.

  11. REPRESENTACIONES SOCIALES SOBRE EL EMPRESARIADO EN LOS ESTUDIANTES DE PREGRADO DE LOS PROGRAMAS DE ADMINISTRACIÓN EN BOGOTÁ

    Directory of Open Access Journals (Sweden)

    CAROLINA ORTIZ RIAGA

    2008-01-01

    Full Text Available Este artículo presenta los resultados de una investigación que identificó las representaciones sociales (proposiciones, concepciones, imágenes, modelos que se manejan alrededor de la actividad empresarial y de la fi gura del empresario en Colombia en los estudiantes que ingresan a 18 facultades de Administración en las universidades bogotanas, a la vez se determinó, si estas se mantienen o modifican en el transcurso de su formación profesional. Los resultados muestran que es posible identificar un núcleo común o compartido de la representación en los estudiantes abordados. Las diferencias se vinculan mayoritariamente con los niveles de elaboración derivadas del proceso de formación y las experiencias adquiridas, al pasar del empirismo en las concepciones empresariales a la formación disciplinar.

  12. Representaciones Sociales Sobre Inclusión de Personas con Discapacidad en Educación Superior

    Directory of Open Access Journals (Sweden)

    Mary-Ann Isaacs Bornand

    2014-01-01

    Full Text Available El presente artículo tuvo como propósito determinar y describir las representaciones sociales de estudiantes universitarios de la ciudad de Temuco sobre inclusión y discapacidad. Se empleó la técnica de Redes Semánticas Naturales (Valdez, 1998. El instrumento fue aplicado a 20 estudiantes universitarios de distintas instituciones de Educación Superior de la ciudad de Temuco durante el mes de Agosto de 2013. Los análisis fueron realizados en base a valores que arrojan las redes semánticas. Los resultados reflejan que los jóvenes consideran necesario entregar mayores oportunidades y aceptación a quienes presentan algún tipo de discapacidad, sin embargo los estudiantes ven el proceso de inclusión universitaria como un proceso complejo y carente de apoyos externos.

  13. "Bolivianos" en la "escuela argentina": representaciones acerca de los hijos de inmigrantes bolivianos en una escuela de la periferia urbana

    Directory of Open Access Journals (Sweden)

    Eduardo Domenech

    Full Text Available Este artículo problematiza la presencia de alumnos identificados como bolivianos en una escuela estatal de nivel primario ubicada en un barrio de la periferia urbana de la capital cordobesa, cuya historia y vida cotidiana están atravesadas por el asentamiento temprano de trabajadores inmigrantes provenientes de distintas regiones de Bolivia. A partir de las observaciones hechas en diversas situaciones escolares y las entrevistas realizadas a los sujetos involucrados en ellas, se analizan las distintas representaciones producidas acerca de los "alumnos bolivianos" en las interacciones cotidianas de la escuela. La evidencia empírica utilizada para elaborar este artículo es producto del trabajo de campo que llevado a cabo, fundamentalmente, en los años 2002-2004 y 2007-2008 en la escuela.

  14. LA EVOLUCIÓN DE LAS REPRESENTACIONES SOCIALES SOBRE LA SALUD DE LAS MUJERES MADRILEÑAS, 1993-2000

    Directory of Open Access Journals (Sweden)

    Fernando Conde

    2002-01-01

    Full Text Available Fundamentos: En 1993 se realizó una primera investigación entre las mujeres madrileñas. En el año 2000 se llevó a cabo una segunda con el objetivo de analizar la posible evolución de las representaciones sociales sobre la salud en las mujeres y, en consecuencia, reorientar, si fuese necesario, los programas de salud definidos en 1993 en función de los nuevos resultados de la investigación. De esta forma, se pretendía analizar la posible evolución de los discursos, de las representaciones sociales sobre la salud que pudiera expresar entre 1993 y el 2000 cada uno de los cinco tipos encontrados en el 1993. Métodos: La investigación cualitativa en el 2000 se basó en la realización de 10 grupos de discusión, definidos en función de las «tipologías» de mujeres que se habían construido en la investigación de 1993. La caracterización de los tipos se realizó en función de las distintas variables sociodemográficas y de rol que se habían expresado más importantes en 1993. El análisis de los discursos se tradujo en una forma gráfica, topológica para visualizar la citada evolución de las representaciones sociales. Resultados: La investigación puso de manifiesto importantes cambios entre 1993 y el 2000. En el 2000 la citada perspectiva discursiva había evolucionado del rol de «ama de casa» al rol de «mujer trabajadora»; en el 2000 las representaciones sociales dominantes hacían hincapié en una dimensión más cercana al equilibrio personal en lo que el papel de la propia mujer, más allá de su familia, tiene mucha importancia; el ámbito de la preocupaciones también evolucionaba, pasando al estrés por la doble jornada laboral. Conclusiones: El estudio permitió obtener conclusiones de tipo metodológico, vinculadas a la capacidad de la metodología cualitativa para hacer estudios comparativos y temporales, y conclusiones de carácter más pragmático, que permitieron reorientar determinados programas de salud

  15. High pressure structural phase transition of neodymium mono pnictides

    International Nuclear Information System (INIS)

    Pagare, Gitanjali; Ojha, P.; Sanyal, S.P.; Aynyas, Mahendra

    2007-01-01

    We have investigated theoretically the high-pressure structural phase transition of two neodymium mono NdX (X=As, Sb) using an interionic potential theory with necessary modification to include the effect of Coulomb screening by the delocalized f electrons of Nd ion. These compounds exhibits first order crystallographic phase transition from their NaCl (B 1 ) phase to body centered tetragonal (BCT) at 27 GPa and 15.3 GPa respectively. We also calculated the Nd-Nd distance as a function of pressure. (author)

  16. IRIS Toxicological Review of Ethylene Glycol Mono-Butyl ...

    Science.gov (United States)

    EPA released the draft report, Toxicological Review for Ethylene Glycol Mono-Butyl Ether , that was distributed to Federal agencies and White House Offices for comment during the Science Discussion step of the IRIS Assessment Development Process. Comments received from other Federal agencies and White House Offices are provided below with external peer review panel comments. EPA is conducting a peer review of the scientific basis supporting the human health hazard and dose-response assessment of EGBE that will appear on the Integrated Risk Information System (IRIS) database.

  17. Transient Monotonic and Cyclic Load Effects on Mono Bucket Foundations

    DEFF Research Database (Denmark)

    Nielsen, Søren Dam

    Today, 80 % of all European offshore wind turbines are installed on monopiles. A cost-effective alternative to the monopile is the mono bucket foundation. For an offshore wind turbine foundation in open seas, the dominant load is often coming from waves. During storms, large waves are formed...... the foundation is sucked to the seabed, creating extra capacity during the impact. Over the life-time of an offshore wind turbine foundation will be hit by millions of waves. Each wave might lead to a permanent rotation of the foundation. Therefore, it is important to be able to estimate the total deformation...

  18. La tiranía de la apariencia en la sociedad de las representaciones

    Directory of Open Access Journals (Sweden)

    Dra. Marta Martín Llaguno

    2002-01-01

    Full Text Available En un momento en el que la persecución de la belleza corporal está propiciando la aparición de nuevas epidemias sociales (como los trastornos de alimentación o los comportamientos compulsivos relacionados con la estética, en este texto se examinan las dos vías por las que, según la autora, los medios de difusión contribuyen en la actualidad a consolidar la "tiranía de las apariencias": su tecnología y sus agendas.En primer lugar se presenta una reflexión sobre el impacto de la comunicación audiovisual en el pensamiento contemporáneo. Se sostiene la tesis de que la imagen personal ha cobrado valor porque vivimos en una "sociedad de representaciones" en la que sólo lo que se observa tiene importancia. La tecnología mediática ha potenciado el lenguaje visual frente al oral y nos ha transformado en "animales videntes" con un modelo plástico de entender el mundo y con un concepto ontológico del hombre en el que el físico (lo que se ve adquiere un valor casi absoluto. Por otra parte, la técnica ha democratizado el anhelo de la estética personal al hacer que gran parte de los ciudadanos mantengamos una interacción privada y personal con los cánones de belleza corporal. En segundo lugar, se admite que las agendas mediáticas (que fijan estereotipos, ungen al atractivo personal de utilidad material y social y confieren valores económicos y trascendentales al cuerpo influyen en los conocimientos, las actitudes y los comportamientos relacionados con la estética de los ciudadanos. Pero se mantiene la hipótesis de que estos mensajes son producto de un complejo sistema de influencias, y no de la decisión autónoma de la comunicación social como institución. En este contexto, el artículo delimita los elementos que participan en la exégesis de la apariencia, haciendo una disección del discurso mediático en tres niveles: el individual, el organizacional y el lógico.La dictadura de la estética personal conduce a una sociedad

  19. Cuerpos heridos, vida alterada: representaciones sociales de mujeres y hombres Wounded bodies, life altered: social representations of women and men

    Directory of Open Access Journals (Sweden)

    Evanilda Souza de Santana Carvalho

    2011-06-01

    Full Text Available Introducción: las mujeres y hombres con úlceras de miembros inferiores experiencian un deterioro continuo y progresivo que altera la vida en los ámbitos físico, social y emocional. Objetivo: captar las Representaciones Sociales sobre el cuerpo herido de mujeres y hombres que viven con heridas. Método: cualitativo. Participaron 25 mujeres y 25 hombres usuarios de uno hospital público de Brasil, en los años 2008-2009. Los datos fueron colectados a través de entrevistas en profundidad, las cuales fueron sometidas al análisis de contenido. Resultados: las mujeres representan sus cuerpos como repugnantes y poco atrayentes. Los hombres representan sus cuerpos como frágiles, inhabilitados para el trabajo. Conclusiones: las representaciones sobre el cuerpo herido influencian en la forma como mujeres y hombres enfermos presentan sus cuerpos, se sienten frente a otros cuerpos, y se comportan frente a los cambios producidos por las heridas.Introduction: Men and women having lower limb ulcers cope with a continuous and progressive deterioration which alter their lives physically, socially and emotionally. Objective: To understand the Social Representations concerning men and women's wounded bodies that live with ulcers. Method: Qualitative study with 25 women and 25 men from a public hospital in Brazil, between 2008 and 2009. The data were collected through interviews which were submitted to content analyses. Results: women represent their bodies as disgusting and little attractive. Men represent their bodies as fragile, not capable to work. Conclusions: The representations regarding wounded bodies influence the way ill women and men present their bodies, how they feel before other bodies and how they face the changes caused by the wounds.

  20. MonoSLAM: real-time single camera SLAM.

    Science.gov (United States)

    Davison, Andrew J; Reid, Ian D; Molton, Nicholas D; Stasse, Olivier

    2007-06-01

    We present a real-time algorithm which can recover the 3D trajectory of a monocular camera, moving rapidly through a previously unknown scene. Our system, which we dub MonoSLAM, is the first successful application of the SLAM methodology from mobile robotics to the "pure vision" domain of a single uncontrolled camera, achieving real time but drift-free performance inaccessible to Structure from Motion approaches. The core of the approach is the online creation of a sparse but persistent map of natural landmarks within a probabilistic framework. Our key novel contributions include an active approach to mapping and measurement, the use of a general motion model for smooth camera movement, and solutions for monocular feature initialization and feature orientation estimation. Together, these add up to an extremely efficient and robust algorithm which runs at 30 Hz with standard PC and camera hardware. This work extends the range of robotic systems in which SLAM can be usefully applied, but also opens up new areas. We present applications of MonoSLAM to real-time 3D localization and mapping for a high-performance full-size humanoid robot and live augmented reality with a hand-held camera.

  1. Biosynthesis and Degradation of Mono-, Oligo-, and Polysaccharides: Introduction

    Science.gov (United States)

    Wilson, Iain B. H.

    Glycomolecules, whether they be mono-, oligo-, or polysaccharides or simple glycosides, are—as any biological molecules—the products of biosynthetic processes; on the other hand, at the end of their lifespan, they are also subject to degradation. The beginning point, biochemically, is the fixation of carbon by photosynthesis; subsequent metabolism in plants and other organisms results in the generation of the various monosaccharides. These must be activated—typically as nucleotide sugars or lipid-phosphosugars—before transfer by glycosyltransferases can take place in order to produce the wide variety of oligo- and polysaccharides seen in Nature; complicated remodelling processes may take place—depending on the pathway—which result in partial trimming of a precursor by glycosidases prior to the addition of further monosaccharide units. Upon completion of the 'life' of a glycoconjugate, glycosidases will degrade the macromolecule finally into monosaccharide units which can be metabolized or salvaged for incorporation into new glycan chains. In modern glycoscience, a wide variety of methods—genetic, biochemical, analytical—are being employed in order to understand these various pathways and to place them within their biological and medical context. In this chapter, these processes and relevant concepts and methods are introduced, prior to elaboration in the subsequent more specialized chapters on biosynthesis and degradation of mono-, oligo-, and polysaccharides.

  2. Las representaciones gráficas en la enseñanza y en el aprendizaje de la física en la universidad

    OpenAIRE

    Idoyaga, Ignacio; Lorenzo, Maria Gabriela

    2017-01-01

    Se presentan la fundamentación y los resultados preliminares del plan de trabajo correspondiente a la tesis “Las representaciones gráficas en la enseñanza y en el aprendizaje de la física en la universidad” en desarrollo en el Centro de Investigación y Apoyo a la Investigación Científica de la Facultad de Farmacia y Bioquímica de la Universidad de Buenos Aires (FFYB-UBA). Este plan propone describir las prácticas áulicas de enseñanza y de aprendizaje de las representaciones gráficas, interpr...

  3. Lugares, actitudes y momentos durante la peste: representaciones sobre la fiebre amarilla y el cólera en la ciudad de Buenos Aires, 1867-1871

    Directory of Open Access Journals (Sweden)

    Maximiliano Ricardo Fiquepron

    Full Text Available Resumen El objetivo de este trabajo es analizar las distintas representaciones que sobre la salud y la enfermedad se asociaron con las epidemias de fiebre amarilla y cólera durante el período 1867-1871 en la ciudad de Buenos Aires. El argumento es que existió un repertorio muy amplio y heterogéneo de representaciones que se condensó en variadas actitudes individuales con la cual se enfrentó la crisis, así como una transformación del espacio y del tiempo social. Para poder sobrellevar esta experiencia traumática se buscó de maneras muy diversas mantener un vínculo social que era también al mismo tiempo una forma de mantener la salud.

  4. Maltrato infantil y representaciones de apego: defensas, memoria y estrategias, una revisión [Child Maltreatment and Attachment Representations: Defenses, Memory and Strategies, a Review

    Directory of Open Access Journals (Sweden)

    Andrés Fresno Rodríguez

    2012-07-01

    Full Text Available El presente artículo realiza una revisión de la literatura sobre la influencia del maltrato infantil en la conformación de las representaciones del apego. Se describen los principales postulados teóricos respecto de los efectos del maltrato en los procesos defensivos, los sistemas de memoria y las estrategias de apego, elementos discutidos a través de la presentación de un modelo integrativo, el cual es contrastado con estudios empíricos. Se constata que el maltrato infantil afecta la calidad de las representaciones del apego, sin embargo se aprecia que los estudios no logran dar cuenta de toda la complejidad del fenómeno del maltrato. Los postulados teóricos abordados en este trabajo son marginalmente puestos a prueba en las investigaciones que se reportan.

  5. Dynamics of biogeochemical sulfur cycling in Mono Lake

    Science.gov (United States)

    Phillips, A. A.; Fairbanks, D.; Wells, M.; Fullerton, K. M.; Bao, R.; Johnson, H.; Speth, D. R.; Stamps, B. W.; Miller, L.; Sessions, A. L.

    2017-12-01

    Mono Lake, California is a closed-basin soda lake (pH 9.8) with high sulfate (120mM), and is an ideal natural laboratory for studying microbial sulfur cycling. Mono Lake is typically thermally stratified in summer while mixing completely in winter. However, large snowmelt inputs may induce salinity stratification that persists for up to five years, causing meromixis. During the California drought of 2014-16, the lake has mixed thoroughly each winter, but the abundant 2017 snowmelt may usher in a multi-year stratification. This natural experiment provides an opportunity to investigate the temporal relationship between microbial sulfur cycling and lake biogeochemistry. We analyzed water samples from five depths at two stations in May of 2017, before the onset of meromixis. Water column sulfate isotope values were generally constant with depth, centering at a δ34SVCDT of 17.39 ± 0.06‰. Organic sulfur isotopes were consistently lighter than lake sulfate, with a δ34SVCDT of 15.59 ± 0.56‰. This significant offset between organic and inorganic sulfur contradicts the minimal isotope effect associated with sulfate assimilation. Sediment push core organic values were further depleted, ranging between δ34SVCDT of -8.94‰ and +0.23‰, implying rapid turnover of Mono Lake sulfur pools. Both lipid biomarkers and 16S rRNA gene amplicons identify Picocystis salinarum, a unicellular green alga, as the dominant member of the microbial community. However, bacterial biomarkers and 16S rRNA genes point to microbes capable of sulfur cycling. We found that dsrA increased with depth (R2 = 0.9008, p reducers and sulfide oxidizers after >1 year of stratification. We saw no evidence in May of 2017 of sulfate reducing bacteria across the oxycline. Additionally, no sulfide was detectable in lake bottom waters despite oxygen below 6.25 µM. Preliminary results suggest a dynamic interplay between sulfide oxidation, sulfate reduction, and the onset of lake stratification. Additional

  6. Representaciones sociales sobre las personas sin hogar: una herencia aún no superada (Social representations on homeless persons: an inheritance still not overcome

    Directory of Open Access Journals (Sweden)

    María José Rubio-Martín

    2017-06-01

    Full Text Available El objetivo de este artículo es conocer las representaciones sociales sobre las PSH a principios del siglo XX. Partiendo de una metodología cualitativa, se hizo una recopilación y análisis de prensa. Basando esta estrategia en la incidencia que los medios de comunicación tienen en las representaciones sociales. El marco teórico partió de las teorías sobre las nuevas estrategias de criminalización del sinhogarismo. En los resultados se resalta cómo siguen vivas viejas representaciones estigmatizadoras y excluyentes. Lo que debe ser considerado en las políticas públicas en un contexto de profunda crisis y vulnerabilidad socioeconómica. | The objective of this article is to know the social representations about the Homeless People in the early twentieth century. Starting from a qualitative methodology, a compilation and analysis of the press was made. Basing this strategy on the impact that the media have on social representations. The theoretical framework started from theories about the new strategies of criminalization of homelessness. The results highlight how old and stigmatizing and excluding representations are still alive. What should be considered in public policies in a context of deep crisis and socio-economic vulnerability.

  7. Los usos del concepto de efervescencia y la dinámica de las representaciones colectivas en la sociología durkheimiana

    Directory of Open Access Journals (Sweden)

    Pablo Nocera

    2009-01-01

    Full Text Available El artículo considera la centralidad de la noción de efervescencia en la sociología de Émile Durkheim identificando sus usos y funcionamiento en relación con las representaciones colectivas. Para ello, el escrito se propone: 1 contextualizar el concepto en el campo de las psicologías de la multitud en Francia en el siglo XIX; 2 efectuar un seguimiento de la semántica del concepto en los distintos usos desplegados por el autor; 3 analizar la peculiaridad de la efervescencia en correspondencia con la primacía de representaciones colectivas no-conceptuales; 4 caracterizar el concepto a partir de su contraparte: la noción de vie sérieuse. Dicho abordaje permite: a dar cuenta del funcionamiento de la efervescencia social sin centrar su comprensión sólo en los efectos que produce: b identificar en su funcionamiento la dinámica con que operan las representaciones colectivas en la integración y regulación sociales: c focalizar la comprensión de estas últimas en relación con los procesos de comunicación.

  8. Mono-jet signatures of gluphilic scalar dark matter

    Directory of Open Access Journals (Sweden)

    Rohini M. Godbole

    2017-09-01

    Full Text Available A gluphilic scalar dark matter (GSDM model has recently been proposed as an interesting vision for WIMP dark matter communicating dominantly with the Standard Model via gluons. We discuss the collider signature of a hard jet recoiling against missing momentum (“mono-jet” in such a construction, whose leading contribution is at one-loop. We compare the full one-loop computation with an effective field theory (EFT treatment, and find (as expected that EFT does not accurately describe regions of parameter space where mass of the colored mediator particles are comparable to the experimental cuts on the missing energy. We determine bounds (for several choices of SU(3 representation of the mediator from the s=8 TeV data, and show the expected reach of the s=13 TeV LHC and a future 100 TeV pp collider to constrain or discover GSDM models.

  9. Mechanically flexible optically transparent porous mono-crystalline silicon substrate

    KAUST Repository

    Rojas, Jhonathan Prieto; Syed, Ahad A.; Hussain, Muhammad Mustafa

    2012-01-01

    For the first time, we present a simple process to fabricate a thin (≥5μm), mechanically flexible, optically transparent, porous mono-crystalline silicon substrate. Relying only on reactive ion etching steps, we are able to controllably peel off a thin layer of the original substrate. This scheme is cost favorable as it uses a low-cost silicon <100> wafer and furthermore it has the potential for recycling the remaining part of the wafer that otherwise would be lost and wasted during conventional back-grinding process. Due to its porosity, it shows see-through transparency and potential for flexible membrane applications, neural probing and such. Our process can offer flexible, transparent silicon from post high-thermal budget processed device wafer to retain the high performance electronics on flexible substrates. © 2012 IEEE.

  10. Synthesis, purification, and time-dependent disposition studies of 9- or 10-mono-iodostearic acid and 9- and 10-mono-iodostearyl carnitine

    International Nuclear Information System (INIS)

    Reed, K.W.

    1985-01-01

    The purpose of this investigation was to evaluate the potential use of radiolabeled 9- or 10-mono-iodostearyl carnitine as a perfusion and metabolic imaging agent for the heart. Radiochemical purity was achieved and determined by the use of silica gel and/or anion exchange resin chromatography. Radiochemical yields of 45-63 and 4% were obtained for the fatty acid and carnitine ester, respectively. Male albino mice were sacrificed at 2, 5, 7, 10, 15, 20, 30, and 50 minutes post-injection with either 125 I 9- or 10-mono-iodostearic acid or 9- or 10-mono-iodostearyl (-) carnitine. The lungs, liver heart, kidney, spleen, pancreas, small intestine, stomach, thyroid, blood, fat, and skeletal muscle tissue were excised and assayed for levels of radioactivity in a NaI crystal well counter. The very low target-to-nontarget ratios obtained with 125 I 9- or 10-mono-iodostearyl carnitine in mice strongly suggest that radioiodinated 9- or 10-mono-iodostearyl carnitine is not suitable for use as a myocardial imaging agent. However, radioiodinated 9- or 10-mono-iodostearic acid showed promise as a myocardial imaging agent and may warrant further investigation

  11. Behavioral ecology of American Pikas (Ochotona princeps) at Mono Craters, California: living on the edge

    Science.gov (United States)

    Andrew T. Smith; John D. Nagy; Connie Millar

    2016-01-01

    The behavioral ecology of the American pika (Ochotona princeps) was investigated at a relatively hot south-facing, low-elevation site in the Mono Craters, California, a habitat quite different from the upper montane regions more typically inhabited by this species and where most prior investigations have been conducted. Mono Craters pikas exhibited...

  12. Magnetic and gravity studies of Mono Lake, east-central, California

    Science.gov (United States)

    Athens, Noah D.; Ponce, David A.; Jayko, Angela S.; Miller, Matt; McEvoy, Bobby; Marcaida, Mae; Mangan, Margaret T.; Wilkinson, Stuart K.; McClain, James S.; Chuchel, Bruce A.; Denton, Kevin M.

    2014-01-01

    From August 26 to September 5, 2011, the U.S. Geological Survey (USGS) collected more than 600 line-kilometers of shipborne magnetic data on Mono Lake, 20 line-kilometers of ground magnetic data on Paoha Island, 50 gravity stations on Paoha and Negit Islands, and 28 rock samples on Paoha and Negit Islands, in east-central California. Magnetic and gravity investigations were undertaken in Mono Lake to study regional crustal structures and to aid in understanding the geologic framework, in particular regarding potential geothermal resources and volcanic hazards throughout Mono Basin. Furthermore, shipborne magnetic data illuminate local structures in the upper crust beneath Mono Lake where geologic exposure is absent. Magnetic and gravity methods, which sense contrasting physical properties of the subsurface, are ideal for studying Mono Lake. Exposed rock units surrounding Mono Lake consist mainly of Quaternary alluvium, lacustrine sediment, aeolian deposits, basalt, and Paleozoic granitic and metasedimentary rocks (Bailey, 1989). At Black Point, on the northwest shore of Mono Lake, there is a mafic cinder cone that was produced by a subaqueous eruption around 13.3 ka. Within Mono Lake there are several small dacite cinder cones and flows, forming Negit Island and part of Paoha Island, which also host deposits of Quaternary lacustrine sediments. The typical density and magnetic properties of young volcanic rocks contrast with those of the lacustrine sediment, enabling us to map their subsurface extent.

  13. Representaciones sociales construidas sobre el cuerpo femenino por mujeres adolescentes, víctimas de explotación sexual

    Directory of Open Access Journals (Sweden)

    Armando Zuluaga-Gómez

    2018-01-01

    Full Text Available El objetivo de este artículo fue explorar y revisar las representaciones sociales y los significados cognitivos y afectivos que mujeres adolescentes víctimas, han construido sobre el cuerpo femenino. La reflexión se sumergió en “eso” que hay debajo de su piel; de ese cuerpo constituido en objeto de deseo para quién lo explota o actúa como intermediario; se indagó sobre las representaciones sociales que sobre el cuerpo de las víctimas, tienen los diferentes actores involucrados en esta vulneración de derechos, así como una franca crítica a la connivencia Social y Estatal. En ese sentido se plantean asuntos que controvierten algunas conceptualizaciones expertas e institucionales como la categoría comercial, con la que se trató de explicar el tipo de relación establecida entre el explotador y un adolescente. Este texto es el resultado de la interacción por más de dos años con víctimas de explotación sexual, observando y registrando en un diario de campo esta problemática en diferentes contextos, lo que permitió el planteamiento de los puntos de vista consignados aquí. En un taller experiencial realizado con mujeres adolescentes víctimas, se obtuvieron construcciones que nos llevaron a comprender aquello que podríamos llamar un cuerpo cosificado, cuya representación social es básicamente que es “una cosa” para el disfrute de otro, sin ningún interés en sus derechos o en el daño que se causa. El tipo de violencia que sufren las víctimas de explotación sexual, ha sido descargada sistemáticamente sobre sus cuerpos, lo que justifica la pertinencia de esta discusión.

  14. Representaciones semióticas alrededor del concepto de función en estudiantes de ingeniería

    Directory of Open Access Journals (Sweden)

    Raúl Prada Núñez

    2017-07-01

    Full Text Available Este artículo retoma parte de una investigación cuyo objeto de estudio son las representaciones semióticas en la enseñanza alrededor del concepto de función en el cálculo diferencial. Tiene como objetivo analizar las representaciones semióticas a partir de la preferencia en los tipos de registro que adoptan los estudiantes alrededor del concepto de función en las carreras de ingeniería, específicamente, en la asignatura Cálculo Diferencial. Se toman como marco de referencia los trabajos de DUVAL (1993, 1998 y HITT (2000, los cuales evidencian favorabilidad derivada de la articulación coherentede los diversos registros de representación semiótica en los procesos de enseñanza (registro algebraico, registro gráfico, registro tabular, entre otros. La investigación se enmarca dentro de un diseño cuasi-experimental y nivel explicativo descriptivo. En los resultados encontrados se identificó que los estudiantes ingresan a la educación superior con bajo nivel conceptual de precálculo, lo que dificulta la comprensión de nuevos conceptos. Por otra parte, se evidencia que persiste el modelo de enseñanza tradicionalen el cual, como se ha mencionado en diferentes investigaciones, predomina el registroalgebraico sobre otros registros de representación, lo que, en el momento de resolver problemas rutinarios y no rutinarios, dificulta al estudiante la búsqueda de soluciones  acertadas. Se destaca que la articulación de los diversos registros de representación permite validar la teoría de DUVAL (1998, reafirmando que en la comprensión de los conceptos matemáticos no debe hacerse de manera directa, como en otras áreas, por lo que es necesario emplear distintas formas de representación y establecer una correcta conexión e intervinculación con el fin de garantizar el aprendizaje en los estudiantes.

  15. Representacions gramaticals i activitat metalingüística dels alumnes de secundària: la categoria verb

    Directory of Open Access Journals (Sweden)

    Carme Durán Rivas

    2009-11-01

    Full Text Available L’article descriu una investigació sobre la representació gramatical que alumnes de l’últim curs de la secundària obligatòria han construït sobre la categoria verb, una noció de gran dificultat epistemològica. La finalitat última és identificar les estràtegies que han fet servir per conceptualizar-la i conèixer les dificultats amb què es troben com un primer pas per, d’una banda, entendre com es produeix el procés d’interiorització dels coneixements gramaticals i, d’una altra, poder dissenyar dispositius didàctics a través d’una metodologia d’ensenyament de la gramàtica basada en el diàleg i en la reflexió sobre la llengua.Es tracta d’una recerca exploratòria que inclou aproximacions quantitatives i qualitatives a l’anàlisi de les dades, en un intent d’ajustar la metodologia als objectius inicials. L’autora destaca l’ús de l’entrevista com a instrument metodològic que permet captar l’activitat metalingüística dels estudiants a través de la interacció amb la investigadora, però també com a instrument d’ensenyament i aprenentatge.Algunes de les conclusions corroboren resultats d’estudis anteriors sobre les representacions gramaticals dels escolars com la falta de coherència i de sistematització dels conceptes gramaticals dels estudiants, la fossilització d’aquests coneixements o la necessitat de partir dels coneixement previs i les representacions per tal de construir el saber gramatical des de bases més sòlides. Mostra la necessitat d’un canvi metodològic en l’ensenyament i aprenentatge de la gramàtica, que es fonamenti sobretot en la reflexió sobre la llengua i el seu ús, i en la interacció amb els altres com a manera de fer emergir la consciència metalingüística.

  16. Representaciones sociales de la Educación para la Salud: docentes Facultad de Medicina, Universidad de Antioquia

    Directory of Open Access Journals (Sweden)

    Margarita M. Gómez G.

    2015-02-01

    Full Text Available Objetivo: reconocer las representaciones sociales (rs sobre Educación para la Salud (EpS presentes en los docentes de la Facultad de Medicina de la Universidad de Antioquia de la ciudad de Medellín. Metodología: estudio cualitativo desde el enfoque de las (rs, donde se analizaron 93 respuestas de docentes a la pregunta: ¿Qué es para usted la EpS? Resultados: del análisis de los datos emergieron como rs de la EpS: 1 Educación médica, asociada a su quehacer docente; 2 Educación a individuos y comunidades, asociada al ejercicio profesional como agentes de salud; y 3 Apropiación del conocimiento que hace el sujeto para su autocuidado. Discusión: las RS de los docentes sobre EpS permitieron comprender que no hay en la enseñanza una intencionalidad política para la trasformación social; que el modelo de comunicación que subyace en la educación es el informacional, aunque hay presencia del modelo relacional; que existe una concepción instrumental de la EpS. Es necesario concientizar al personal de salud de la importancia que para la educación tiene el modelo de comunicación relacional.

  17. EXILIO E INSILIO: REPRESENTACIONES POLÍTICAS Y SUJETOS ESCINDIDOS EN LA POESÍA CHILENA DE LOS SETENTA

    Directory of Open Access Journals (Sweden)

    Naín Nómez

    2010-04-01

    Full Text Available Este artículo hace un recuento y un análisis de la poesía chilena que se produce dentro y fuera de Chile en los años setenta, con especial énfasis en la concepción del exilio y el insilio. Además de focalizarse en las problemáticas "exilio-insilio", su desarrollo y posterior integración, este trabajo analiza fundamentalmente las relaciones que se producen entre los poetas y su entorno a través de sus representaciones subjetivas en diferentes situaciones y lugares, especialmente urbanos. Tanto las ciudades del interior como las ciudades del exilio adquieren connotaciones represivas que inciden en las problemáticas de un sujeto escindido en los poemas.This article is an inventory and analysis of Chilean Poetry in the seventies, written in Chile and abroad, emphasizing the "exilio" and "insilio" concept. Apart from focusing on the "exilio-insilio " problem, its development and subsequent integration, this work analyzes the relationships between poets and their environment by means of subjective representations in different situations and places (especially urban. The cities of Chile, as well as foreign cities in the countries of exile, acquire repressive connotations, which influence the problems of the divided subject in this poetry.

  18. REPRESENTACIONES SOCIALES SOBRE LA CIUDAD. APROXIMACIÓN A UN ESTUDIO ETNOGRÁFICO EN CARTAGENA DE INDIAS

    Directory of Open Access Journals (Sweden)

    Kenia Victoria Cogollo

    2009-08-01

    Full Text Available El objetivo de la investigación fue identificar formas poco conocidas de ver, usar, entender y apropiar la ciudad que tienen sus habitantes, indagando acerca de las representaciones sociales sobre la Cartagena contemporánea, que cada uno ha construido en su interacción con ella. Desde esa perspectiva, el proyecto de investigación permitió descubrir qué piensa la gente de la ciudad, qué significa para ella, qué valor le dan como espacio de vida, para, a partir de ello, perfilar propuestas que apoyen la recuperación y fortalecimiento de procesos colectivos que la resignifiquen, en beneficio de propios y extraños. La investigación de tipo cualitativo, desde la perspectiva etnográfica, accedió al estudio de aspectos de la cultura de grupos humanos que conviven en esta ciudad. Además, permitió que concurrieran “sintonías” convenientes para investigadores sociales, planificadores y administradores de la ciudad, convergencia fundamental para la formulación de planes sociales que impulsen el desarrollo sociocultural de la ciudad, que tengan respaldo en expectativas, conocimientos, prácticas sociales e intereses de sus habitantes. Las técnicas usadas en la recolección de información fueron: Entrevista semiestructurada y Observación recurrente.

  19. Hollywood y Eisenstein filman multitudes: Representaciones cinematográficas de la conciencia social y la experiencia de clase

    Directory of Open Access Journals (Sweden)

    Elina Mercedes Tranchini

    2004-11-01

    Full Text Available El artículo analiza las representaciones fílmicas de la conciencia social y la experiencia de clase, en relación a varias series de películas del cine clásico, tanto europeo como hollywoodense, que ponen en escena a sujetos sociales colectivos y conflictos sociales. Se intenta responder a la pregunta sobre la posibilidad y alcances de la representación visual y fílmica de las categorías teóricas de las ciencias sociales En esta dirección se examina la homogeneización de las masas en la epopeya de multitudes anónimas en la época del cine mudo, en el cine épico-histórico de la Italia fascista y en las superproducciones históricas estadounidenses de los años cincuenta, así como la aparición fílmica del sujeto histórico proletariado en el cine de la vanguardia rusa de la década de 1920 y su preocupación por filmar expresamente la conciencia revolucionaria y los conflictos de concientización.

  20. REPRESENTACIONES DE DOCENTES DE CIENCIAS NATURALES: PUNTO DE PARTIDA PARA LA REFLEXIÓN DE LA PRÁCTICA

    Directory of Open Access Journals (Sweden)

    Julieta Laudadío

    2015-01-01

    Full Text Available En este artículo se presentan algunos resultados de un proceso investigativo realizado en la provincia de San Juan de Argentina, en el cual se indagaron las representaciones sociales (RS de un grupo de profesores de Ciencias Naturales en el marco de un taller de educación continua. Para la recopilación de la información se utilizaron: encuestas, observaciones no participantes en el aula, entrevistas individuales y cuestionarios aplicados a los docentes, así como grupos focales en los que se trabajó en la reflexión de los resultados preliminares. En este sentido, se expone el análisis de los resultados obtenidos, los cuales evidenciaron, por un lado, la coherencia entre la realidad del quehacer docente y lo que ellos piensan que hacen y por otro, la necesidad de favorecer la reflexión para que ellos puedan establecer relación entre pensamiento y práctica y de esta forma, evidenciar diferencias e incoherencias, lo cual contribuiría a fortalecer el proceso educativo de las Ciencias Naturales.

  1. Representaciones sobre el paisaje y la naturaleza en la frontera occidental de la Audiencia de Quito, 1595-1630

    Directory of Open Access Journals (Sweden)

    Raúl Hernández Asensio

    2006-06-01

    Full Text Available Este artículo analiza la forma cómo se construyó el conocimiento geográfico en la gobernación de Esmeraldas y las diferentes representaciones del paisaje de esta región a comienzos siglo XV1I. El análisis de estos discursos permite introducir el tema de las narrativas imperiales y su complejo proceso de elaboración. El conjunto de discursos que vincula la identidad cultural de los habitantes de una región con el paisaje de su entorno es un proceso de largo recorrido, iniciado a finales del siglo XV. Como resultado, apareció una narrativa "oficial", que se impuso paulatinamente, y que coexistió con otros discursos, producidos desde otros ámbitos de la sociedad colonial. Los autores analizados son cuatro: Gaspar de Torres, Antonio de Morga, Martín de Fuica y Cristóbal de Troya. En todos los casos se trata de literatura "administrativa" o "burocrática", no destinada para su publicación.

  2. 21 CFR 582.4505 - Mono- and diglycerides of edible fats or oils, or edible fat-forming acids.

    Science.gov (United States)

    2010-04-01

    ... 21 Food and Drugs 6 2010-04-01 2010-04-01 false Mono- and diglycerides of edible fats or oils, or... GENERALLY RECOGNIZED AS SAFE Emulsifying Agents § 582.4505 Mono- and diglycerides of edible fats or oils, or edible fat-forming acids. (a) Product. Mono- and diglycerides of edible fats or oils, or edible fat...

  3. Resveratrol induces cellular senescence with attenuated mono-ubiquitination of histone H2B in glioma cells

    International Nuclear Information System (INIS)

    Gao, Zhen; Xu, Michael S.; Barnett, Tamara L.; Xu, C. Wilson

    2011-01-01

    Research highlights: → Resveratrol induces cellular senescence in glioma cell. → Resveratrol inhibits mono-ubiquitination of histone H2B at K120. → Depletion of RNF20, phenocopies the inhibitory effects of resveratrol. → Mono-ubiquitination of histone H2B at K120 is a novel target of resveratrol. → RNF20 inhibits cellular senescence in proliferating glioma cells. -- Abstract: Resveratrol (3,4',5-trihydroxy-trans-stilbene), a polyphenol naturally occurring in grapes and other plants, has cancer chemo-preventive effects and therapeutic potential. Although resveratrol modulates multiple pathways in tumor cells, how resveratrol or its affected pathways converge on chromatin to mediate its effects is not known. Using glioma cells as a model, we showed here that resveratrol inhibited cell proliferation and induced cellular hypertrophy by transforming spindle-shaped cells to enlarged, irregular and flatten-shaped ones. We further showed that resveratrol-induced hypertrophic cells expressed senescence-associated-β-galactosidase, suggesting that resveratrol-induced cellular senescence in glioma cells. Consistent with these observations, we demonstrated that resveratrol inhibited clonogenic efficiencies in vitro and tumor growth in a xenograft model. Furthermore, we found that acute treatment of resveratrol inhibited mono-ubiquitination of histone H2B at K120 (uH2B) in breast, prostate, pancreatic, lung, brain tumor cells as well as primary human cells. Chronic treatment with low doses of resveratrol also inhibited uH2B in the resveratrol-induced senescent glioma cells. Moreover, we showed that depletion of RNF20, a ubiquitin ligase of histone H2B, inhibited uH2B and induced cellular senescence in glioma cells in vitro, thereby recapitulated the effects of resveratrol. Taken together, our results suggest that uH2B is a novel direct or indirect chromatin target of resveratrol and RNF20 plays an important role in inhibiting cellular senescence programs that are

  4. Resveratrol induces cellular senescence with attenuated mono-ubiquitination of histone H2B in glioma cells

    Energy Technology Data Exchange (ETDEWEB)

    Gao, Zhen; Xu, Michael S.; Barnett, Tamara L. [Nevada Cancer Institute, Las Vegas, NV 89135 (United States); Xu, C. Wilson, E-mail: wxu@nvcancer.org [Nevada Cancer Institute, Las Vegas, NV 89135 (United States)

    2011-04-08

    Research highlights: {yields} Resveratrol induces cellular senescence in glioma cell. {yields} Resveratrol inhibits mono-ubiquitination of histone H2B at K120. {yields} Depletion of RNF20, phenocopies the inhibitory effects of resveratrol. {yields} Mono-ubiquitination of histone H2B at K120 is a novel target of resveratrol. {yields} RNF20 inhibits cellular senescence in proliferating glioma cells. -- Abstract: Resveratrol (3,4',5-trihydroxy-trans-stilbene), a polyphenol naturally occurring in grapes and other plants, has cancer chemo-preventive effects and therapeutic potential. Although resveratrol modulates multiple pathways in tumor cells, how resveratrol or its affected pathways converge on chromatin to mediate its effects is not known. Using glioma cells as a model, we showed here that resveratrol inhibited cell proliferation and induced cellular hypertrophy by transforming spindle-shaped cells to enlarged, irregular and flatten-shaped ones. We further showed that resveratrol-induced hypertrophic cells expressed senescence-associated-{beta}-galactosidase, suggesting that resveratrol-induced cellular senescence in glioma cells. Consistent with these observations, we demonstrated that resveratrol inhibited clonogenic efficiencies in vitro and tumor growth in a xenograft model. Furthermore, we found that acute treatment of resveratrol inhibited mono-ubiquitination of histone H2B at K120 (uH2B) in breast, prostate, pancreatic, lung, brain tumor cells as well as primary human cells. Chronic treatment with low doses of resveratrol also inhibited uH2B in the resveratrol-induced senescent glioma cells. Moreover, we showed that depletion of RNF20, a ubiquitin ligase of histone H2B, inhibited uH2B and induced cellular senescence in glioma cells in vitro, thereby recapitulated the effects of resveratrol. Taken together, our results suggest that uH2B is a novel direct or indirect chromatin target of resveratrol and RNF20 plays an important role in inhibiting cellular

  5. THE RECOGNITION OF SPOKEN MONO-MORPHEMIC COMPOUNDS IN CHINESE

    Directory of Open Access Journals (Sweden)

    Yu-da Lai

    2012-12-01

    Full Text Available This paper explores the auditory lexical access of mono-morphemic compounds in Chinese as a way of understanding the role of orthography in the recognition of spoken words. In traditional Chinese linguistics, a compound is a word written with two or more characters whether or not they are morphemic. A monomorphemic compound may either be a binding word, written with characters that only appear in this one word, or a non-binding word, written with characters that are chosen for their pronunciation but that also appear in other words. Our goal was to determine if this purely orthographic difference affects auditory lexical access by conducting a series of four experiments with materials matched by whole-word frequency, syllable frequency, cross-syllable predictability, cohort size, and acoustic duration, but differing in binding. An auditory lexical decision task (LDT found an orthographic effect: binding words were recognized more quickly than non-binding words. However, this effect disappeared in an auditory repetition and in a visual LDT with the same materials, implying that the orthographic effect during auditory lexical access was localized to the decision component and involved the influence of cross-character predictability without the activation of orthographic representations. This claim was further confirmed by overall faster recognition of spoken binding words in a cross-modal LDT with different types of visual interference. The theoretical and practical consequences of these findings are discussed.

  6. Loss of Kynurenine 3-Mono-oxygenase Causes Proteinuria.

    Science.gov (United States)

    Korstanje, Ron; Deutsch, Konstantin; Bolanos-Palmieri, Patricia; Hanke, Nils; Schroder, Patricia; Staggs, Lynne; Bräsen, Jan H; Roberts, Ian S D; Sheehan, Susan; Savage, Holly; Haller, Hermann; Schiffer, Mario

    2016-11-01

    Changes in metabolite levels of the kynurenine pathway have been observed in patients with CKD, suggesting involvement of this pathway in disease pathogenesis. Our recent genetic analysis in the mouse identified the kynurenine 3-mono-oxygenase (KMO) gene (Kmo) as a candidate gene associated with albuminuria. This study investigated this association in more detail. We compared KMO abundance in the glomeruli of mice and humans under normal and diabetic conditions, observing a decrease in glomerular KMO expression with diabetes. Knockdown of kmo expression in zebrafish and genetic deletion of Kmo in mice each led to a proteinuria phenotype. We observed pronounced podocyte foot process effacement on long stretches of the filtration barrier in the zebrafish knockdown model and mild podocyte foot process effacement in the mouse model, whereas all other structures within the kidney remained unremarkable. These data establish the candidacy of KMO as a causal factor for changes in the kidney leading to proteinuria and indicate a functional role for KMO and metabolites of the tryptophan pathway in podocytes. Copyright © 2016 by the American Society of Nephrology.

  7. Fringing in MonoCam Y4 filter images

    International Nuclear Information System (INIS)

    Brooks, J.; Nomerotski, A.; Fisher-Levine, M.

    2017-01-01

    We study the fringing patterns observed in MonoCam, a camera with a single Large Synoptic Survey Telescope (LSST) CCD sensor. Images were taken at the U.S. Naval Observatory in Flagstaff, Arizona (NOFS) employing its 1.3 m telescope and an LSST y 4 filter. Fringing occurs due to the reflection of infrared light (700 nm or larger) from the bottom surface of the CCD which constructively or destructively interferes with the incident light to produce a net ''fringe'' pattern which is superimposed on all images taken. Emission lines from the atmosphere, dominated by hydroxyl (OH) spectra, can change in their relative intensities as the night goes on, producing different fringe patterns in the images taken. We found through several methods that the general shape of the fringe patterns remained constant, though with slight changes in the amplitude and phase of the fringes. We also found that a superposition of fringes from two monochromatic lines taken in the lab offered a reasonable description of the sky data.

  8. Electron transfer kinetics on mono- and multilayer graphene.

    Science.gov (United States)

    Velický, Matěj; Bradley, Dan F; Cooper, Adam J; Hill, Ernie W; Kinloch, Ian A; Mishchenko, Artem; Novoselov, Konstantin S; Patten, Hollie V; Toth, Peter S; Valota, Anna T; Worrall, Stephen D; Dryfe, Robert A W

    2014-10-28

    Understanding of the electrochemical properties of graphene, especially the electron transfer kinetics of a redox reaction between the graphene surface and a molecule, in comparison to graphite or other carbon-based materials, is essential for its potential in energy conversion and storage to be realized. Here we use voltammetric determination of the electron transfer rate for three redox mediators, ferricyanide, hexaammineruthenium, and hexachloroiridate (Fe(CN)(6)(3-), Ru(NH3)(6)(3+), and IrCl(6)(2-), respectively), to measure the reactivity of graphene samples prepared by mechanical exfoliation of natural graphite. Electron transfer rates are measured for varied number of graphene layers (1 to ca. 1000 layers) using microscopic droplets. The basal planes of mono- and multilayer graphene, supported on an insulating Si/SiO(2) substrate, exhibit significant electron transfer activity and changes in kinetics are observed for all three mediators. No significant trend in kinetics with flake thickness is discernible for each mediator; however, a large variation in kinetics is observed across the basal plane of the same flakes, indicating that local surface conditions affect the electrochemical performance. This is confirmed by in situ graphite exfoliation, which reveals significant deterioration of initially, near-reversible kinetics for Ru(NH3)(6)(3+) when comparing the atmosphere-aged and freshly exfoliated graphite surfaces.

  9. Mono-energy coronary angiography with a compact light source

    Science.gov (United States)

    Eggl, Elena; Mechlem, Korbinian; Braig, Eva; Kulpe, Stephanie; Dierolf, Martin; Günther, Benedikt; Achterhold, Klaus; Herzen, Julia; Gleich, Bernhard; Rummeny, Ernst; Noël, Peter B.; Pfeiffer, Franz; Muenzel, Daniela

    2017-03-01

    While conventional x-ray tube sources reliably provide high-power x-ray beams for everyday clinical practice, the broad spectra that are inherent to these sources compromise the diagnostic image quality. For a monochromatic x-ray source on the other hand, the x-ray energy can be adjusted to optimal conditions with respect to contrast and dose. However, large-scale synchrotron sources impose high spatial and financial demands, making them unsuitable for clinical practice. During the last decades, research has brought up compact synchrotron sources based on inverse Compton scattering, which deliver a highly brilliant, quasi-monochromatic, tunable x-ray beam, yet fitting into a standard laboratory. One application that could benefit from the invention of these sources in clinical practice is coronary angiography. Being an important and frequently applied diagnostic tool, a high number of complications in angiography, such as renal failure, allergic reaction, or hyperthyroidism, are caused by the large amount of iodine-based contrast agent that is required for achieving sufficient image contrast. Here we demonstrate monochromatic angiography of a porcine heart acquired at the MuCLS, the first compact synchrotron source. By means of a simulation, the CNR in a coronary angiography image achieved with the quasi-mono-energetic MuCLS spectrum is analyzed and compared to a conventional x-ray-tube spectrum. The results imply that the improved CNR achieved with a quasi-monochromatic spectrum can allow for a significant reduction of iodine contrast material.

  10. Conventional laparoscopic adrenalectomy versus laparoscopic adrenalectomy through mono port.

    Science.gov (United States)

    Kwak, Ha Na; Kim, Jun Ho; Yun, Ji-Sup; Son, Byung Ho; Chung, Woong Youn; Park, Yong Lai; Park, Chan Heun

    2011-12-01

    A standard procedure for single-port laparoscopic adrenal surgery has not been established. We retrospectively investigated intraoperative and postoperative outcomes after laparoscopic adrenalectomy through mono port (LAMP) and conventional laparoscopic adrenalectomy to assess the feasibility of LAMP. Between March 2008 and December 2009, 22 patients underwent adrenalectomy at the Department of Surgery, Kangbuk Samsung Hospital. Twelve patients underwent conventional laparoscopic adrenalectomy and 10 patients underwent LAMP. The same surgeon performed all the surgeries. The 2 procedures were compared in terms of tumor size, operating time, time to resumption of a soft diet, length of hospital day, and postoperative complications. The 2 groups were similar in terms of tumor size (30.08 vs. 32.50 mm, P=0.796), mean operating time (112.9 vs. 127 min, P=0.316), time to resumption of a soft diet (1.25 vs. 1.30 d, P=0.805), and length of hospital day (4.08 vs. 4.50 d, P=0.447). Despite 1 patient in the LAMP group experiencing ipsilateral pleural effusion as a postoperative complication, this parameter was similar for the 2 groups (P=0.195). Perioperative mortality, blood transfusion, and conversion to open surgery did not occur. Perioperative outcomes for LAMP were similar to those for conventional laparoscopic adrenalectomy. LAMP appears to be a feasible option for adrenalectomy.

  11. Antioxidant and cytotoxic activity of mono- and bissalicylic acid derivatives

    Directory of Open Access Journals (Sweden)

    Đurendić Evgenija A.

    2014-01-01

    Full Text Available A simple synthesis of mono- and bis-salicylic acid derivatives 1-10 by the transesterification of methyl salicylate (methyl 2-hydroxybenzoate with 3-oxapentane-1,5-diol, 3,6- dioxaoctane-1,8-diol, 3,6,9-trioxaundecane-1,11-diol, propane-1,2-diol or 1-aminopropan- 2-ol in alkaline conditions is reported. All compounds were tested in vitro on three malignant cell lines (MCF-7, MDA-MB-231, PC-3 and one non-tumor cell line (MRC- 5. Strong cytotoxicity against prostate PC-3 cancer cells expressed compounds 3, 4, 6, 9 and 10, all with the IC50 less than 10 μmol/L, which were 11-27 times higher than the cytotoxicity of antitumor drug doxorubicin. All tested compounds were not toxic against the non-tumor MRC-5 cell line. Antioxidant activity of the synthesized derivatives was also evaluated. Compounds 2, 5 and 8 were better OH radical scavengers than commercial antioxidants BHT and BHA. The synthesized compounds showed satisfactory scavenger activity, which was studied by QSAR modeling. A good correlation between the experimental variables IC50 DPPH and IC50 OH and MTI (molecular topological indices molecular descriptors and CAA (accessible Connolly solvent surface area for the new compounds 1, 3, and 5 was observed.

  12. Retrofitting of beaters with mono-drive at a beater-wheel mill; Nachruestung von Vorschlaegern mit Mono-Antrieb an einer Schlagradmuehle

    Energy Technology Data Exchange (ETDEWEB)

    Krecher, Johannes J.; Hildebrandt, Rainer [Lignite-Mono-Drive Engineering GmbH, Essen (Germany); Geradts, Paul [RWE Power AG, Grevenbroich (Germany)

    2008-07-01

    Due to a future energy crisis, the use of the domestic brown coal continuously must be strengthened. At the beginning of 2007, the power station Frimmersdorf of RWE Power AG (Essen, Federal Republic of Germany) commissioned Lignite-Mono-Drive Engineering GmbH (Essen, Federal Republic of Germany) with the retrofitting of a N90.60 beater-wheel mill to a mono-drive-system. Thus, the production losses of 20 GWh/a of the 150 MW brown coal block M should be avoided, and the performance of this brown coal block should be increased by nearly 3 MW. Apart from the milling process and drying process, the authors of the contribution under consideration describe the application and operation results of these mono-drive-mills.

  13. Calix[6]arene mono-diazonium salt synthesis and covalent immobilization onto glassy carbon electrodes

    International Nuclear Information System (INIS)

    Cannizzo, Caroline; Jasmin, Jean-Philippe; Vautrin-Ul, Christine; Chausse, Annie; Wagner, Mathieu; Doizi, Denis; Lamouroux, Christine

    2014-01-01

    This Letter describes the fast synthesis of a mono-aminated calix[6]arene. The immobilization of this macrocycle onto glassy carbon electrodes via diazonium salt chemistry and the electrochemical characterization of the grafted organic layer are also reported. (authors)

  14. Developing C# Apps for iPhone and iPad using MonoTouch

    CERN Document Server

    Costanich, Bryan

    2011-01-01

    Developing C# Applications for iPhone and iPad using MonoTouch shows you how to use your existing C# skills to write apps for the iPhone and iPad. Fortunately, there's MonoTouch, Novell's .NET library that allows C# developers to write C# code that executes in iOS. Furthermore, MonoTouch allows you to address all the unique functions of the iPhone, iPod Touch, and iPad. And the big plus: You needn't learn any Objective-C to master MonoTouch!. Former Microsoft engineer and published app-store developer Bryan Costanich shows you how to use the tools you already know to create native apps in iOS

  15. Representaciones sociales relacionadas a la anemia en niños menores de tres años en comunidades Awajún y Wampis, Perú

    Directory of Open Access Journals (Sweden)

    Julio Mayca-Pérez

    Full Text Available RESUMEN Objetivos Conocer las representaciones sociales de las comunidades awajún y wampis en torno a síntomas y tratamiento de la anemia en niños menores de 03 años, la relación con sus simbolismos, constructos y tipo de alimentación. Materiales y métodos Estudio cualitativo realizado entre junio y agosto del 2015, en los distritos de Río Santiago, Cenepa y Nieva (región Amazonas, Perú; que incluyó entrevistas en profundidad (EP para personal de salud, autoridades de la comunidad y padres de familia, y grupos focales (GF para madres de familia. Resultados Se realizaron 38 EP y 13 GF. La población no tuvo un significado claro sobre la anemia, ni manejaba la misma descripción del personal de salud; sino que lo relacionaba con una sintomatología en base a sus representaciones sociales y manifestaciones culturales. Esto aplicaba en la decisión de los padres por el tratamiento a optar, no necesariamente, lo indicado por el personal de salud, y que prefieren el consumo de ciertos alimentos que podrían curar el putsumat. El acudir al establecimiento de salud o utilizar multimicronutrientes no era entonces su primera opción de tratamiento. Conclusiones Las representaciones sociales y prácticas tradicionales continúan existiendo y poseen sistemas interpretativos sobre la salud, la enfermedad y su manejo, con lógicas, sentidos y coherencia según grupo cultural. El putsumat o putsuju es un modelo interpretativo equivalente para la anemia, con una sintomatología presentada por los niños con palidez, delgadez, cansancio, sustentado en el sistema cultural simbólico de las poblaciones awajún y wampis.

  16. Representações sociais da água em Santa Catarina Representaciones sociales del agua en Santa Catarina Social representation of water in Santa Catarina State

    Directory of Open Access Journals (Sweden)

    Gislei Mocelin Polli

    2009-09-01

    Full Text Available Preocupações ambientais, entre elas problemas relacionados à água, estão cada vez mais presentes na sociedade contemporânea. Nesta pesquisa buscou-se conhecer as representações sociais da água em comunidades rurais de Santa Catarina. Este é um dos subprojetos do programa Tecnologias Sociais para Gestão da Água, patrocinado pela Petrobrás Ambiental. Para este estudo houve aplicação de instrumento de evocações livres, tendo como termo indutor "Água". As respostas foram tratadas pelos programas Evoc e Similitude 2000 e analisadas a partir da teoria do núcleo central. Os resultados indicam que a água é compreendida como essencial à vida, ligada à saúde e de necessária preservação. A sustentabilidade também é suscitada, pois a água é considerada essencial à sobrevivência. Seu uso em atividades cotidianas também foi considerado. Elementos como poluição, economia e escassez indicam preocupação com o que vem acontecendo em relação ao recurso e com a necessidade de preservá-lo.Preocupaciones ambientales, entre ellos problemas relacionados al agua, están cada vez más presentes en la sociedad. En esta investigación se buscó conocer las representaciones sociales del agua en comunidades rurales de Santa Catarina. Este es uno de los proyectos subordinados al Programa: Tecnologías Sociales para la Gestión del Agua, patrocinado por la Petrobras Ambiental. Para este estudio fue aplicado un instrumento de evocación libre, teniendo como término inductor "Agua". Las respuestas fueron procesadas por los programas Evoc y Similitude 2000, y analisadas a partir de la teoría del núcleo central. Los resultados indican que el agua es entendida como escencial para la vida, ligada a la salud, y necesita ser preservada. La sustentabilidad también es considerada, pues el agua es considerada esencial para la sobrevivencia. El uso del recurso en actividades cotidianas también fue considerado. Elementos como polución, econom

  17. Geothermal systems of the Mono Basin-Long Valley region, eastern California and western Nevada

    Energy Technology Data Exchange (ETDEWEB)

    Higgins, C.T.; Flynn, T.; Chapman, R.H.; Trexler, D.T.; Chase, G.R.; Bacon, C.F.; Ghusn, G. Jr.

    1985-01-01

    The region that includes Mono Basin, Long Valley, the Bridgeport-Bodie Hills area, and Aurora, in eastern California and western Nevada was studied to determine the possible causes and interactions of the geothermal anomalies in the Mono Basin-Long Valley region as a whole. A special goal of the study was to locate possible shallow bodies of magma and to determine their influence on the hydrothermal systems in the region. (ACR)

  18. Representaciones sociales del trasplante de médula ósea, la quimioterapia y la cirugía oncológica en población general colombiana

    OpenAIRE

    Dimey Hoyos, Nathaly; Jaramillo Villegas, Ana Maria

    2016-01-01

    Las representaciones sociales son una construcción de significados que las personas otorgan a un objeto en este caso el tratamiento oncológico. En el mundo, el cáncer es una enfermedad de alta prevalencia y sus tratamientos suelen generar numerosos efectos secundarios, pero a la vez es el recurso médico disponible para controlar la enfermedad. Este estudio cualitativo tuvo como objetivo analizar las representaciones sociales del tratamiento oncológico en población colombiana. Participaron vol...

  19. Selección de Características 2D en Representaciones Tiempo Frecuencia para la Detección de Soplos Cardíacos

    OpenAIRE

    Juan D. Martínez-Vargas; Luis D. Avendaño-Valencia; Germán Castellanos-Domínguez

    2011-01-01

    En el presente trabajo se propone una metodología para la reducción de dimensión en representaciones tiempo frecuencia (TFRs) enfocada a la clasificación de bioseñales no estacionarias, que trata directamente su cantidad de datos irrelevantes y redundantes, combinando una etapa de selección de características con una etapa de reducción de dimensión por medio de métodos de descomposición lineal extendidos a datos bidimensionales. La metodología se prueba sobre un conjunto de TFRs paramétricas ...

  20. Análisis de resultados de entrevistas a jóvenes universitarios sin hijos sobre representaciones sociales de maternidad y paternidad

    OpenAIRE

    Feldman, Graciela Noemi; González, Angel; Iglesias, Soledad; Colombo, María Elena; D'Avirro, María Julieta

    2009-01-01

    Este informe es parte de un proyecto de investigación trienal que se plantea la exploración de las representaciones sociales –RRSS- de la maternidad y de la paternidad en adolescentes tardíos universitarios sin hijos. Las RRSS son una construcción sociocultural (Wagner & Elejabarrieta, 1994), cuyos contenidos emergen de procesos sociales, que a su vez influyen sobre la realidad. Las RRSS se refieren a imágenes y modelos que explican algún fenómeno relevante para un grupo social determinado (A...

  1. 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...

  2. El escenario de “la ciudad” como espacio de las representaciones y los movimientos sociales en América Latina

    Directory of Open Access Journals (Sweden)

    César Augusto Vásquez García

    2008-01-01

    Full Text Available Este artículo hace referencia a los modos de construir identidades individuales y colectivas a través de las representaciones sociales que visualizan la historia, la literatura, la sociología y la antropología, en las ciudades de México, D.F. y Bogotá, D.C. En este sentido, la propuesta metodológica se sustenta en los estudios culturales como reconstrucción de las prácticas culturales a partir de la transversalización de los saberes sociales que circulan dentro y fuera de la academia.

  3. La realidad al cuadrado : Representaciones sobre lo político en el humor gráfico del diario Clarín (1973-1983)

    OpenAIRE

    Levín, Florencia Paula

    2015-01-01

    En esta investigación se intenta bordear a partir del análisis sistemático de las representaciones sobre lo político construidas por el humor gráfico del diario Clarín, que por entonces ya era el matutino de mayor tirada a nivel nacional. Dado el amplio margen de inespecificidad y ambigüedad del término, es importante aclarar que cuando me refiero al "humor gráfico" del diario Clarín estoy aludiendo conjuntamente a los "cartoon" de Landrú publ...

  4. Dificultades de los alumnos para articular representaciones gráficas y algebraicas de funciones lineales y cuadráticas

    OpenAIRE

    Córdoba, Luis; Díaz, María Elina; Haye, Egle Elisabet; Montenegro, Fabiana

    2013-01-01

    Este trabajo forma parte de una investigación en curso, destinada a estudiar la incidencia de las representaciones visuales de los conceptos en el aprendizaje de matemática universitaria. Se reportan aquí los resultados de un estudio descriptivo y exploratorio sobre las dificultades en la articulación de registros gráficos y algebraicos que se observaron en 109 estudiantes de reciente ingreso a carreras de ingeniería. Se describen las actividades de conversión propuestas y se presenta el anál...

  5. La evolución de las representaciones sociales sobre la salud de las mujeres madrileñas, 1993-2000.

    Directory of Open Access Journals (Sweden)

    Conde Fernando

    2002-01-01

    Full Text Available Fundamentos: En 1993 se realizó una primera investigación entre las mujeres madrileñas. En el año 2000 se llevó a cabo una segunda con el objetivo de analizar la posible evolución de las representaciones sociales sobre la salud en las mujeres y, en consecuencia, reorientar, si fuese necesario, los programas de salud definidos en 1993 en función de los nuevos resultados de la investigación. De esta forma, se pretendía analizar la posible evolución de los discursos, de las representaciones sociales sobre la salud que pudiera expresar entre 1993 y el 2000 cada uno de los cinco tipos encontrados en el 1993. Métodos: La investigación cualitativa en el 2000 se basó en la realización de 10 grupos de discusión, definidos en función de las "tipologías" de mujeres que se habían construido en la investigación de 1993. La caracterización de los tipos se realizó en función de las distintas variables sociodemográficas y de rol que se habían expresado más importantes en 1993. El análisis de los discursos se tradujo en una forma gráfica, topológica para visualizar la citada evolución de las representaciones sociales. Resultados: La investigación puso de manifiesto importantes cambios entre 1993 y el 2000. En el 2000 la citada perspectiva discursiva había evolucionado del rol de "ama de casa" al rol de "mujer trabajadora"; en el 2000 las representaciones sociales dominantes hacían hincapié en una dimensión más cercana al equilibrio personal en lo que el papel de la propia mujer, más allá de su familia, tiene mucha importancia; el ámbito de la preocupaciones también evolucionaba, pasando al estrés por la doble jornada laboral. Conclusiones: El estudio permitió obtener conclusiones de tipo metodológico, vinculadas a la capacidad de la metodología cualitativa para hacer estudios comparativos y temporales, y conclusiones de carácter más pragmático, que permitieron reorientar determinados programas de salud orientados a

  6. Discovery and industrial applications of lytic polysaccharide mono-oxygenases.

    Science.gov (United States)

    Johansen, Katja S

    2016-02-01

    The recent discovery of copper-dependent lytic polysaccharide mono-oxygenases (LPMOs) has opened up a vast area of research covering several fields of application. The biotech company Novozymes A/S holds patents on the use of these enzymes for the conversion of steam-pre-treated plant residues such as straw to free sugars. These patents predate the correct classification of LPMOs and the striking synergistic effect of fungal LPMOs when combined with canonical cellulases was discovered when fractions of fungal secretomes were evaluated in industrially relevant enzyme performance assays. Today, LPMOs are a central component in the Cellic CTec enzyme products which are used in several large-scale plants for the industrial production of lignocellulosic ethanol. LPMOs are characterized by an N-terminal histidine residue which, together with an internal histidine and a tyrosine residue, co-ordinates a single copper atom in a so-called histidine brace. The mechanism by which oxygen binds to the reduced copper atom has been reported and the general mechanism of copper-oxygen-mediated activation of carbon is being investigated in the light of these discoveries. LPMOs are widespread in both the fungal and the bacterial kingdoms, although the range of action of these enzymes remains to be elucidated. However, based on the high abundance of LPMOs expressed by microbes involved in the decomposition of organic matter, the importance of LPMOs in the natural carbon-cycle is predicted to be significant. In addition, it has been suggested that LPMOs play a role in the pathology of infectious diseases such as cholera and to thus be relevant in the field of medicine. © 2016 Authors; published by Portland Press Limited.

  7. Coaxial Mono-Energetic Gamma Generator for Active Interrogation

    International Nuclear Information System (INIS)

    Ludewigt, Bernhard A.; Antolak, A.J.; Henestroza, E.; Leitner, M.; Leung, K.-N.; Waldron, W.; Wilde, S.; Kwan, J.W.

    2008-01-01

    Compact mono-energetic photon sources are sought for active interrogation systems to detect shielded special nuclear materials in, for example, cargo containers, trucks and other vehicles. A prototype gamma interrogation source has been designed and built that utilizes the 11B(p,gamma)12C reaction to produce 12 MeV gamma-rays which are near the peak of the photofission cross section. In particular, the 11B(p,gamma)12C resonance at 163 kV allows the production of gammas at low proton acceleration voltages, thus keeping the design of a gamma generator comparatively small and simple. A coaxial design has been adopted with a toroidal-shaped plasma chamber surrounding a cylindrical gamma production target. The plasma discharge is driven by a 2 MHz rf-power supply (capable up to 50 kW) using a circular rf-antenna. Permanent magnets embedded in the walls of the plasma chamber generate a multi-cusp field that confines the plasma and allows higher plasma densities and lower gas pressures. About 100 proton beamlets are extracted through a slotted plasma electrode towards the target at the center of the device that is at a negative 180 kV. The target consists of LaB6 tiles that are brazed to a water-cooled cylindrical structure. The generator is designed to operate at 500 Hz with 20 mu s long pulses, and a 1percent duty factor by pulsing the ion source rf-power. A first-generation coaxial gamma source has been built for low duty factor experiments and testing.

  8. "LA LEY PAREJA NO ES DURA" REPRESENTACIONES DE LA CRIMINALIDAD Y LA JUSTICIA EN LA LIRA POPULAR CHILENA

    Directory of Open Access Journals (Sweden)

    DANIEL PALMA ALVARADO

    2006-06-01

    Full Text Available El estudio ofrece una aproximación a la historia social y urbana del Chile liberal y salitrero (1880-1920, a partir de las liras populares. Estos pliegos de poesía popular permiten descubrir y reconstruir las sensibilidades y representaciones sociales en torno a los más diversos tópicos, de los cuales se examinan en este artículo aquellos referidos a la criminalidad y la justicia, al crimen y al castigo. El análisis de las liras arroja una completa hermenéutica popular que aporta importantes matices a la comprensión tradicional de estos temas, dando cuenta de cuestiones como la violencia urbana, el clasismo del aparato judicial y el debate en torno a la pena de muerte. Asimismo, se reflexiona sobre la circulación de las liras entre la población urbana, observándose que el circuito de la cultura popular en que estaban inmersas las liras, se comienza a vincular de manera dialógica con otras expresionesThrough examining the liras populares, this study offers an approximation to social and urban history in the liberal and nitrate-funded Chilean era (1880-1920. These single sheets of popular poetry allow us to uncover social representations and sensibilities around wide topics. This article analyzes issues regarding criminality and justice, crime and punishment. The liras' analysis explores a popular hermeneutic that nuances traditional interpretations around Chilean crime and judiciary, opening new approaches to popular understandings on urban violence, the classism of the judiciary apparatus, and the debates concerning dead penalty. Likewise, this article explores the problem of the liras' urban distribution, circulation and impact, looking after the popular culture circuits that were growingly, dialogically linked to other expressions of cultural production

  9. Violencia y paganismo en el mundo franco temprano carolingio: representaciones de la alteridad germánica (siglo VIII

    Directory of Open Access Journals (Sweden)

    Jonathan Perl Garrido

    2016-08-01

    Full Text Available El artículo trata uno de los aspectos del problema de la construcción de las representaciones de la otredad en el período temprano carolingio. Esta otredad es identificada con los pueblos no incluidos en la unidad política franca ni la unidad religiosa cristiana, establecidos en las regiones al Noreste del reino franco de Austrasia, principalmente sajones y frisones. En la definición de estos pueblos como “los otros”, los criterios religiosos y morales jugaron un rol fundamental. A partir de fuentes historiográficas, hagiográficas, epistolares y legales, se hace revisión de las formas de representar a los paganos, por los autores cristianos, como característicamente violentos hacia el cristianismo y el orden franco, a partir de las que se les clasifica en el concepto de “bárbaros”. Se propone  y muestra que el uso del recurso a la violencia física de parte de los bárbaros varía en función de los contextos específicos en los que se produjeron las fuentes, especialmente en cuanto al desarrollo contemporáneo de los procesos de evangelización y conquista de las regiones señaladas, además de aquellos procesos internos en el reino franco, relativos a la toma y mantención del poder del reino por parte de los carolingios.

  10. Opinión pública y representaciones sociales en torno a los alimentos transgénicos

    Directory of Open Access Journals (Sweden)

    Espeitx Bernal, Elena

    2005-04-01

    Full Text Available The public opinion has an outstanding influence in the political decisions. The European surveys indicates that the attitudes about OGMs are mainly opposed and these results have been one of the keys in the brake to the authorizations of new varieties. Nevertheless, it is doubtful that those opinions are sustained in adverse stances of the citizens. They operate in a social universe where the interpretation of the discussion is closely bound to the social perceptions about the own society. Therefore, it agrees to approach what kind of social representations mobilize the OMGs, in order to look for the guidelines that sustain the attitudes and to verify if the interpretation of the public opinion publishes recover them.

    La opinión pública tiene una influencia relevante en las decisiones institucionales. En el caso de los organismos genéticamente modificados (OGM, los posicionamientos mayoritariamente opuestos que reflejan las encuestas de opinión desarrolladas en Europa han sido clave en el freno a la autorización de nuevas variedades. Sin embargo, no está claro que esas opiniones se sustenten en posicionamientos manifiestamente adversos de los ciudadanos, sino que operan en un universo social y cultural complejo, en el que la interpretación del debate se enmarca en la percepción que se tiene de la propia sociedad. Por ello conviene analizar qué representaciones sociales los OGM movilizan, para buscar las pautas que sustentan ese posicionamiento y comprobar hasta qué punto la interpretación de la opinión publica se hace verdadero eco.

  11. Sexo, poder y cine: Relaciones de poder y representaciones sexuales en los nuevos relatos pornográficos

    Directory of Open Access Journals (Sweden)

    Sara Angelina Pedraz Poza

    2011-07-01

    Full Text Available La pornografía tradicional se caracteriza por atribuir roles determinados a los sujetos que representa y, por tanto, trasladar unas relaciones de poder basadas en la supremacía de lo blanco, anglosajón, heterosexual y masculino, frente a cualquier otra identidad. Al mismo tiempo, cosifica los cuerpos femeninos, patologiza determinadas corporeidades y constriñe las posibilidades de sentir deseo y las prácticas sexuales realizables. No obstante, desde finales de los años 90 y, sobre todo, con la entrada del nuevo milenio, han aparecido nuevas formas de representar las identidades, los cuerpos ajenos a la dicotomía hombre-mujer y las diferentes formas de producir y estimular el deseo. Estas formas son principalmente dos: el porno para mujeres y la pospornografía. En este artículo se estudiará cómo estas dos corrientes del cine pornográfico consiguen desvirtuar las relaciones de poder tradicionales y utilizar la pornografía como un campo de batalla necesario para visibilizar determinadas identidades y sexualidades y como una opción política para luchar contra las hegemonías existentes. Para ello, se partirá de los marcos teóricos en los que se formaron cada una de ellas, su extrapolación al ámbito académico español y se analizarán los casos de estudio más representativos de cada una de las dos corrientes, teniendo como punto de partida las conexiones que existen entre las relaciones de poder y las representaciones sexuales.

  12. Roles of mono-ubiquitinated Smad4 in the formation of Smad transcriptional complexes

    International Nuclear Information System (INIS)

    Wang Bei; Suzuki, Hiroyuki; Kato, Mitsuyasu

    2008-01-01

    TGF-β activates receptor-regulated Smad (R-Smad) through phosphorylation by type I receptors. Activated R-Smad binds to Smad4 and the complex translocates into the nucleus and stimulates the transcription of target genes through association with co-activators including p300. It is not clear, however, how activated Smad complexes are removed from target genes. In this study, we show that TGF-β enhances the mono-ubiquitination of Smad4. Smad4 mono-ubiquitination was promoted by p300 and suppressed by the c-Ski co-repressor. Smad4 mono-ubiquitination disrupted the interaction with Smad2 in the presence of constitutively active TGF-β type I receptor. Furthermore, mono-ubiquitinated Smad4 was not found in DNA-binding Smad complexes. A Smad4-Ubiquitin fusion protein, which mimics mono-ubiquitinated Smad4, enhanced localization to the cytoplasm. These results suggest that mono-ubiquitination of Smad4 occurs in the transcriptional activator complex and facilitates the turnover of Smad complexes at target genes

  13. Generalized dynamic model and control of ambiguous mono axial vehicle robot

    Directory of Open Access Journals (Sweden)

    Frantisek Duchon

    2016-09-01

    Full Text Available This article deals with the novel concept of ambiguous mono axial vehicle robot. Such robot is a combination of Segway and dicycle, which utilizes the advantages of each chassis. The advantage of dicycle is lower energy consumption during the movement and the higher safety of carried payload. The movable platform inside the ambiguous mono axial vehicle allows using the various sensors or devices. This will change the ambiguous mono axial vehicle to the Segway type robot. Both these modes are necessary to control in the stable mode to ensure the safety of the ambiguous mono axial vehicle’s movement. The main contents of the article contain description of generalized dynamic model of ambiguous mono axial vehicle and related control of ambiguous mono axial vehicle. The proposal is unique in that the same controller is used for both modes. Several simulations verify proposed control schemes and identified parameters. Moreover, the dicycle type of platform has never been used in robotics and that is another novelty.

  14. Moisture sources of the Mono Lake deglacial pluvial events

    Science.gov (United States)

    Wang, X.; Liang, M. C.; Ali, G.; Shen, C. C.; Cai, Y.; Ke, L.; Hemming, S. R.

    2016-12-01

    Enormously expanded lakes existed in the today's dry western US Great Basin during the last glacial period. The ancient shorelines located well above modern lake levels suggest that precipitation in lake basins must have been substantially higher in the past. It is however under debate whether the subtropical North Pacific or the tropical Pacific is the major moisture source that contributed to the pluvial events, particularly during the deglaciation. Here, we collected a suite of tufa carbonate samples deposited at the 2,080 meter terrace ( 135 meters above today's lake level) in the Mono Basin, California, a closed lake basin for the last 130 thousand years (kyr). At Goat Ranch, we discovered white, shiny, laminated botryoidal carbonate coatings on tufa mounds. Most of these coatings present two generations of formation separated by a hiatus, which indicates lake level fluctuations. Using high-precision U-Th dating techniques, we found that the lower layer was formed 14.1-14.4 kyr BP (corresponding to the North Atlantic Bølling warming period). The upper layer of the coating was formed 11.9-12.3 kyr BP (within the Younger Dryas event). We then obtained d18O, d13C, D47 and 17O-excess values for the two carbonate layers. The upper part is characterized by low d18O values, -8 to -12 ‰ VPDB, whereas the lower one has higher d18O values, -5 to -6 ‰ VPDB. Both share similar d13C values ( 1-2‰ VPDB). D47 analysis on the carbonates suggests that both layers were deposited in a water temperature of 9±2 oC (1s, n = 4 and 8, respectively). The two generations of carbonates present 17O-excess of moisture in values of 50±5 (1s, n=4) and 25±5 (1s, n=8) per meg VSMOW-SLAP, respectively. The large difference in 17O-excess of parent meteoric water points to different origins of moisture for the tufa carbonate formations. The high 17O-excess values during YD suggest a moisture source with a low relative humidity, consistent with the conventional view that the moisture

  15. Homoleptic mono- and dinuclear cationic alkoxydiphosphazane derivatives of rhodium

    International Nuclear Information System (INIS)

    Edwards, K.J.; Haines, R.J.; Meintjies, E.; Sigwarth, B.

    1990-01-01

    Treatment of the solvento species [Rh(C 8 H 12 )(solvent) 2 ][SbF 6 ] (solvent = methanol, ethanol, or tetrahydrofuran) with a twice-molar amount of the diphosphazane ligands (RO) 2 PN(R') P(OR) 2 (R' = Me or Et; R = Me, Et, or Pr i ) in the appropriate solvent leads to the ready formation of monocationic [Rh{(RO) 2 PN(R')P(OR) 2 } 2 ] + and/or dicationic [Rh 2 {μ-(RO) 2 PN(R')P(OR) 2 } 2 {(RO) 2 PN(R')P(OR) 2 } 2 ] 2+ hexafluoroantimonate salts, with the tendency to afford dinuclear derivatives decreasing along the series Me>Et>Pr i . Carbon monoxide readily forms addition products with these ionic species, giving rise to five-coordinate derivatives of the type [Rh(CO){(RO) 2 PN(R')P (OR) 2 } 2 ][SbF 6 ] in the case of the mononuclear derivatives, and inserting across the two rhodium atoms to afford [Rh 2 (μ-CO){μ-(MeO) 2 PN(Et)P(OMe) 2 } 2 {(MeO) 2 PN(Et)P(OMe) 2 } 2 ][SbF 6 ] 2 in the case of [Rh 2 {μ-(MeO) 2 PN (Et)P(OMe) 2 } 2 {(MeO) 2 PN(Et)P(OMe) 2 } 2 ][SbF 6 ] 2 . These mono- and dicationic derivatives also react readily with iodine affording [RhI 2 {(RO) 2 PN(R')P(OR) 2 } 2 ][SbF 6 ] and [Rh 2 (μ-I){μ-(MeO) 2 PN(Et)P(OMe) 2 } 2 {(MeO) 2 PN(Et)P(OMe) 2 } 2 ][SbF 6 ] n (n = 2 or 3) respectively. The coordination behaviour of the diphosphorus ligands (MeO) 2 PCH 2 P(OMe) 2 and Me 2 PCH 2 PMe 2 towards [Rh(C 8 H 12 )(solvent) 2 ][SbF 6 ] has also been investigated. 1 fig., 1 tab., 19 refs

  16. Al límite de la violencia de género: representaciones de transgresiones protagonizadas por mujeres en la prensa cartagenera, 1940-1950

    Directory of Open Access Journals (Sweden)

    Carlos Mario Castrillón Castro

    2016-06-01

    Full Text Available El objetivo de este texto es estudiar las representaciones sobre las transgresiones de mujeres a partir de datos de prensa, los cuales permiten hacer una aproximación al papel que éstas han jugado dentro de la sociedad, no como actores pasivos sino de forma activa. En primer lugar, a partir de un enfoque de género presentamos un análisis de lo que se considera configura los modos de vida buena de la época y como estas mujeres al transgredirlos contravienen el espacio asignado a las mujeres en la sociedad. Se aludirán las representaciones de las mujeres en la prensa de Cartagena para la década de 1940-1950 ante denuncias presentadas por ciudadanos en diferentes casos. Son entonces mujeres transgresoras por sus actividades delictivas. Luego, se hará una descripción de los tipos de delitos en los cuales las mujeres eran participes: brujería, homicidio, infanticidio, así como escándalos, riñas, robos, hurtos y agresiones físicas y se analizará el discurso periodístico empleado para referirse a ellos desde la perspectiva de género.

  17. Representaciones culturales de países hispanohablantes: una mirada a los recursos visuales en el contexto de EaD

    Directory of Open Access Journals (Sweden)

    Leandra Cristina de Oliveira

    2017-09-01

    Full Text Available Con vistas a la relevancia de la discusión sobre cultura en la Lingüística Aplicada, tanto en el ámbito de la enseñanza de lengua materna como de lengua extranjera, direccionamos el diálogo sobre el tema a la enseñanza de español en la Educación a Distancia (EaD. Observando el Curso de Letras Español de la Universidad Federal de Santa Catarina, en la modalidad EaD, objetivamos discutir las representaciones culturales de los países hispanohablantes en las imágenes del Ambiente virtual de la asignatura Lengua Española I. Consonante al objetivo, asentamos la siguiente cuestión: ¿en qué medida las representaciones culturales en las imágenes analizadas contribuyen para la desconstrucción de concepciones reduccionistas y estereotipadas sobre los países hispanohablantes? La respuesta a esta cuestión procede del análisis de las imágenes introductorias de los tópicos de la asignatura citada, fundamentada en bases teóricas de estudios culturales, con especial atención a los conceptos de cultura, identidad y diferencia.

  18. Representaciones sociales sobre la relación insectos-ambiente en estudiantes de 601 del I.P.N. Pág. 56-76

    Directory of Open Access Journals (Sweden)

    Maritza García, Montes

    2013-03-01

    Full Text Available Este trabajo es el resultado de la práctica pedagógica llevada a cabo en el año 2009 en el Instituto Pedagógico Nacional. Con el objetivo de identificar las representaciones sociales RS de los estudiantes de 601 sobre la relación insectos- ambiente, y de allí, ver su pertinencia en el proceso educativo, específicamente en el campo de la Biología. Se realizó bajo un enfoque cualitativo, de tipo descriptivo-interpretativo, utilizando instrumentos como la observación, la entrevista, los dibujos-imágenes y talleres lúdicos. Organizando la información obtenida bajo el método comparativo constante (MCC. Tras la investigación, se obtuvo que el estudio de las RS en los espacios educativos tienen que ver no solo con los aprendizajes sistemáticos y con los conocimientos conceptuales que el maestro trabaja en clase, sino con la posibilidad de abordar otros espacios no tan formales en los que también confluyen los individuos con toda su carga de representaciones (Fernández y Hernández, 2005. Permitiendo así, conocer aspectos poco abordados en el proceso educativo y que definitivamente amplían el campo de trabajo de la biología.

  19. Aportes para las representaciones sobre la sexualidad en la disponibilidad léxica de estudiantes secundarios de la región NEA

    Directory of Open Access Journals (Sweden)

    Natalia Virginia Colombo

    2013-01-01

    Full Text Available En este trabajo aportamos datos para el estudio de las representaciones sociales sobre la sexualidad a partir de la identificación y análisis del léxico sincrónico disponible en jóvenes de la región NEA de Argentina. El cálculo de la disponibilidad léxica, para el que utilizamos el programa LEXIDISP, patrocinado por el Instituto Cervantes, la Universidad de Alcalá y la Asociación de Lingüística y Filología de América Latina, se basa en la aplicación de pruebas asociativas determinadas por temas o centros de interés. Para ser más precisos, seleccionamos aquí temas en los que aparecen unidades que refieren a la sexualidad: Partes del cuerpo, Profesiones y oficios, Juegos y distracciones y ¿Cómo insultamos? Las representaciones se basan en las relaciones entre las manifestaciones sincrónicas concretas del lenguaje de las ciudades de Resistencia y Corrientes, tomadas en conjuntos estratégicos: las partes del cuerpo relacionadas con el sexo, la prostitución, la masturbación, enfermedades de transmisión sexual, el coito, diversidad sexual: homosexualidad, transexualidad y bisexualidad, y la mujer histérica.

  20. Consumo televisivo de padres y niños y recepción de las representaciones de autoridad agenciadas por la televisión

    Directory of Open Access Journals (Sweden)

    Jakeline Duarte-Duarte

    2016-01-01

    Full Text Available El tema de este artículo se inscribe en el papel de la televisión como instancia cultural que dispone la formación de valores, actitudes y relaciones sociales de diverso orden. A la televisión se le ha adjudicado un lugar destacado en la aparente “crisis de autoridad” que viven las familias y la sociedad a causa de los contenidos que cuestionan la hegemonía de los adultos como figuras de autoridad. En esta perspectiva, se desarrolló una investigación de diseño mixto que contempló dentro de sus objetivos identificar el consumo televisivo de padres y niños entre 5 y 6 años y las representaciones de autoridad agenciadas por la televisión. Tal indagación se realizó mediante la aplicación de una encuesta a 81 padres de familia de diferentes estratos socioeconómicos de Medellín y Envigado, Colombia. Como conclusión, se destaca el consumo televisivo individualizado de los niños, el exiguo papel orientador de los padres en ello, la recepción de representaciones televisivas que expresan relaciones más simétricas entre padres e hijos y la emergencia de nuevas figuras de poder propias del mundo delictivo, asumidas como figuras de autoridad.

  1. “De la ilusión al desencanto”. Senegaleses en Buenos Aires y la construcción de representaciones respecto a su proyecto migratorio.

    Directory of Open Access Journals (Sweden)

    Gisele Kleidermacher

    2016-03-01

    Full Text Available El artículo se propone reflexionar respecto a las representaciones sociales construidas sobre las trayectorias migratorias de jóvenes senegaleses que han arribado a la Argentina en las últimas dos décadas, y que se enmarcan en una corriente poblacional que une el África Subsahariana con el Cono Sur de América Latina.La elección de analizar las representaciones sociales, se fundamenta en que las entiendo como una modalidad particular del conocimiento cuya función es la elaboración de los comportamientos y la comunicación entre los individuos. A partir de las mismas he podido reflexionar en torno a las expectativas y perspectivas de los protagonistas respecto a diversos condicionamientos sociales, culturales, económicos, históricos y familiares que influyen de diversas maneras en el proyecto migratorio, y que serán desarrollados en el escrito, involucrando los factores de origen y de destino. 

  2. Selección de Características 2D en Representaciones Tiempo Frecuencia para la Detección de Soplos Cardíacos

    Directory of Open Access Journals (Sweden)

    Juan D. Martínez-Vargas

    2011-06-01

    Full Text Available En el presente trabajo se propone una metodología para la reducción de dimensión en representaciones tiempo frecuencia (TFRs enfocada a la clasificación de bioseñales no estacionarias, que trata directamente su cantidad de datos irrelevantes y redundantes, combinando una etapa de selección de características con una etapa de reducción de dimensión por medio de métodos de descomposición lineal extendidos a datos bidimensionales. La metodología se prueba sobre un conjunto de TFRs paramétricas calculadas sobre una base de datos de señales fonocardiográficas (FCG para la detección de soplos cardiacos. Los resultados muestran una mejora comparados con otras metodologías que no tienen en cuenta la presencia de datos irrelevantes y redundantes en las representaciones, además, el uso de las metodologías de descomposición lineal bidimensionales reducen adecuadamente la redundancia de las TFRs, obteniendo un nuevo conjunto de características 2D de menor dimensión que el conjunto inicial.

  3. Comparison between mono-bloc and bi-bloc mandibular advancement devices for obstructive sleep apnea.

    Science.gov (United States)

    Lee, Woo Hyun; Wee, Jee Hye; Lee, Chul Hee; Kim, Min-Su; Rhee, Chae-Seo; Yun, Pil-Young; Yoon, In-Young; Kim, Jeong-Whun

    2013-11-01

    Although mandibular advancement device (MAD) is widely used, there are a few papers comparing the efficacy and compliance at the same time according to the type of MAD. The aim of this study is to compare the efficacy and compliance between mono-bloc and bi-bloc MAD in the treatment of obstructive sleep apnea (OSA). Ninety-three patients who treated with mono-bloc MAD and 60 patients with bi-bloc MAD from January 2007 through September 2011 were retrospectively enrolled. All the patients underwent full-night polysomnography(PSG) before and 3 months after MAD was applied. The response rate was significantly higher in the patients using mono-bloc than those using bi-bloc MAD (77.4 vs. 58.3 %; P = 0.012). In contrast, the compliance rate of MAD use was significantly higher in the patients using bi-bloc than those using mono-bloc MAD (68.8 vs. 83.3 %; P = 0.044) at 1 year. According to the severity of OSA, the response rate was significantly higher in severe OSA than in mild to moderate OSA (P = 0.033 for mono-bloc MAD and P = 0.048 for bi-bloc MAD). However, there was no difference in the compliance between mild to moderate OSA and severe OSA. Our study showed that mono-bloc MAD was superior to bi-bloc MAD in efficacy while bi-bloc MAD is superior to mono-bloc MAD in compliance. We propose that both the efficacy and compliance should be considered in using MAD for treatment of OSA.

  4. Lik'ichiri y kharisiri... A propósito de las representaciones del 'otro' en la sociedad aymara

    Directory of Open Access Journals (Sweden)

    1991-01-01

    Full Text Available LIK’ICHIRI ET KHARISIRI. A PROPOS DES REPRESENTATIONS DE L’”AUTRE” DANS LA SOCIETE AYMARA. Dans le monde aymara le lik’ichiri est une représentation de l’ “autre” et il est toujours perçu comme un être maléfique. Dans cet article, à partir d’exemples récents, je m’attacherai à montrer comment les représentations traditionnelles ont pu se modifier en même temps que de nouveaux acteurs apparaissaient dans les champs des rapports sociaux à l’extérieur et à l’intérieur des communautés aymaras où s’opposent diverses catégories sociales et ethniques (indiens/q’ara, riches/pauvres, etc., oppositions qui engendrent des espaces où naît le personnage étudié ici. En el mundo aymara el lik’ichiri es una representación del “otro”. Es siempre considerado como un ser maléfico. En el presente ensayo, basándome en eventos recientes, trataré de demostrar las modificaciones ocurridas en las representaciones tradicionales a medida que nuevos actores aparecen en el campo de las relaciones sociales, tanto fuera como dentro de las comunidades aymaras. En ellas, se oponen diferentes categorías sociales y étnicas (indios/q’ara, ricos/pobres, etc., oposiciones que generan espacios donde nace el personaje estudiado. LIK’ICHIRI AND KHARISIRI. REPRESENTATIONS OF THE “OTHER ONE” IN THE AYMARA SOCIETY. In the aymara world, the lik’ichiri is a representation of the “other one”. He is always considered as someone who is harmful. In this article, and confirming recents events, I will try to show how the traditional representations of the “other one” have been modified as new actors appear in the field of social relations both inside and outside the Aymara community. In these communities different social and ethnic categories opposed one another (indians/q’ara, rich/poor, etc, oppositions that create space where the lik’ichiri here studied is born.

  5. Contraste de un modelo del sentido de pertenencia, categorización social, representaciones sociales e identidad laboral en migrantes

    Directory of Open Access Journals (Sweden)

    Cruz García Lirios

    2014-12-01

    Full Text Available En el marco de la migración, el impacto del mercado global en las oportunidades locales ha sido un tema de estudio comúnmente abordado por cuatro hipótesis: 1 identidad, 2 adaptación, 3 asimilación y 4 selección. Estos supuestos consideran a la migración como un efecto de los flujos económicos financieros desde los que es posible anticipar la construcción de una nueva identidad entre dos culturas diferentes, el ajuste de las capacidades laborales a las demandas del mercado local, el aprendizaje de habilidades, conocimientos según los valores de la economía receptora y del desarrollo humano a partir del establecimiento de un sistema de competencias laborales. Empero, salvo los estudios relativos a la identidad y aculturación, estos parecen obviar que el estudio de la migración no sólo se circunscribe a quienes transitan de una economía emergente hacia un país desarrollado, o bien, a aquellos flujos migratorios del campo a la urbe. En este sentido, el objetivo del presente trabajo es contrastar una quinta hipótesis acerca de que la travesía, estancia y retorno de los migrantes a su lugar de origen obedece a la identidad y alteridad en la que se manifiesta el sentido de pertenencia, categorización social, representaciones sociales e identidad. Para tal propósito, se llevó a cabo un estudio transversal de corte cuantitativo con una selección no probabilística de 157 residentes de Xilitla, San Luis Potosí, México. Los resultados muestran que la objetivación y el anclaje del mercado laboral estadounidense influye en la identidad de la muestra encuestada (β = 0,57. A partir de un modelo estructural [X2 = 15,25 (25gl p = 0,000; GFI = 1,000; RMR = 0,000] la hipótesis de la identidad-alteridad fue aceptada y discutida según el estado del conocimiento.

  6. Brazilian fans’ social representations on soccer. (Representaciones sociales de los hinchas brasileños sobre fútbol.

    Directory of Open Access Journals (Sweden)

    Joao Fernando Rech Wachelke

    2008-10-01

    Full Text Available AbstractThe study aims at describing the organizing principles and the structure of Brazilian soccer fans’ social representations on soccer. 521 participants, who supported five Brazilian clubs, participated in the study. Data collection took place through an internet form advertised in online communities about soccer. Participants answered open-ended free evocation tasks in which they mentioned the first words that came to their minds when thinking about soccer. Responses were categorized according to their theme and correspondence analysis, prototypical analysis and similarity analysis were employed for data analysis. Results suggest that soccer clubs, fans, emotion and goal constitute the representation’s central core and organize the structure. Correspondence analysis results present contrasts between concrete and symbolic aspects of the sport, while there are also variations in the representational field according to participants’ clubs, age ranges and involvement with fan clubs.ResumenEl estudio tiene como objetivo describir los principios de organización y la estructura de las representaciones sociales de los hinchas brasileños sobre fútbol. 521 participantes, que apoyaron a cinco clubs brasileños, participaron en el estudio. La colección de datos ocurrió a través de un cuestionario de Internet anunciado en comunidades en on line sobre fútbol. Los participantes contestaron a tareas de evocación libre en las cuales mencionaron las primeras palabras que vinieron a sus mentes al pensar sobre fútbol. Las respuestas fueron categorizadas según su tema y el análisis de correspondencia, el análisis prototípico y el análisis de semejanza fueron empleados para el análisis de datos. Los resultados sugieren que los clubs, los aficionados, la emoción y el gol constituyen la base central de la representación y organizan la estructura. Los resultados del análisis de correspondencia demuestran contrastes entre aspectos simb

  7. [Technique of complex mammary irradiation: Mono-isocentric 3D conformational radiotherapy and helical tomotherapy].

    Science.gov (United States)

    Vandendorpe, B; Guilbert, P; Champagne, C; Antoni, T; Nguyen, T D; Gaillot-Petit, N; Servagi Vernat, S

    2017-12-01

    To evaluate the dosimetric contribution of helical tomotherapy for breast cancers compared with conformal radiotherapy in mono-isocentric technique. For 23 patients, the dosimetric results in mono-isocentric 3D conformational radiotherapy did not satisfy the constraints either of target volumes nor organs at risk. A prospective dosimetric comparison between mono-isocentric 3D conformational radiotherapy and helical tomotherapy was therefore carried out. The use of helical tomotherapy showed a benefit in these 23 patients, with either an improvement in the conformity index or homogeneity, but with an increase in low doses. Of the 23 patients, two had pectus excavatum, five had past thoracic irradiation and two required bilateral irradiation. The other 14 patients had a combination of morphology and/or indication of lymph node irradiation. For these patients, helical tomotherapy was therefore preferred to mono-isocentric 3D conformational radiotherapy. Tomotherapy appears to provide better homogeneity and tumour coverage. This technique of irradiation may be justified in the case of morphological situations such as pectus exavatum and in complex clinical situations. In other cases, conformal radiotherapy in mono-isocentric technique remains to be favoured. Copyright © 2017 Société française de radiothérapie oncologique (SFRO). Published by Elsevier SAS. All rights reserved.

  8. Selective mono-radioiodination and characterization of a cell-penetrating peptide. L-Tyr-maurocalcine

    Energy Technology Data Exchange (ETDEWEB)

    Ahmadi, Mitra; Bacot, Sandrine; Perret, Pascale; Riou, Laurent; Ghezzi, Catherine [Universite Joseph Fourier, Grenoble (France); INSERM U1039, Grenoble (France). Radiopharmaceutiques Biocliniques; Poillot, Cathy; Cestele, Sandrine [INSERM U836, Grenoble (France). Grenoble Inst. of Neuroscience; Universite Joseph Fourier, Grenoble (France); Desruet, Marie-Dominique [INSERM U1039, Grenoble (France). Radiopharmaceutiques Biocliniques; Couvet, Morgane; Bourgoin, Sandrine; Seve, Michel [CRI-INSERM U823, Grenoble (France). Inst. of Albert Bonniot; Universite Joseph Fourier, Grenoble (France); Waard, Michel de [INSERM U836, Grenoble (France). Grenoble Inst. of Neuroscience; Universite Joseph Fourier, Grenoble (France); Smartox Biotechnologies, Grenoble (France)

    2014-07-01

    Mono-and poly-iodinated peptides form frequently during radioiodination procedures. However, the formation of a single species in its mono-iodinated form is essential for quantitative studies such as determination of tissue concentration or image quantification. Therefore, the aim of the present study was to define the optimal experimental conditions in order to exclusively obtain the mono-iodinated form of L-maurocalcine (L-MCa). L-MCa is an animal venom toxin which was shown to act as a cell-penetrating peptide. In order to apply the current direct radioiodination technique using oxidative agents including chloramine T, Iodo-Gen {sup registered} or lactoperoxidase, an analogue of this peptide containing a tyrosine residue (Tyr-L-MCa) was synthesized and was shown to fold/oxidize properly. The enzymatic approach using lactoperoxidase/H{sub 2}O{sub 2} was found to be the best method for radioiodination of Tyr-L-MCa. MALDI-TOF mass spectrometry analyses were then used for identification of the chromatographic eluting components of the reaction mixtures. We observed that the production of different radioiodinated species depended upon the reaction conditions. Our results successfully described the experimental conditions of peptide radioiodination allowing the exclusive production of the mono-iodinated form with high radiochemical purity and without the need for a purification step. Mono-radioiodination of L-Tyr-MCa will be crucial for future quantitative studies, investigating the mechanism of cell penetration and in vivo biodistribution.

  9. PCNA mono-ubiquitination and activation of translesion DNA polymerases by DNA polymerase {alpha}.

    Science.gov (United States)

    Suzuki, Motoshi; Niimi, Atsuko; Limsirichaikul, Siripan; Tomida, Shuta; Miao Huang, Qin; Izuta, Shunji; Usukura, Jiro; Itoh, Yasutomo; Hishida, Takashi; Akashi, Tomohiro; Nakagawa, Yoshiyuki; Kikuchi, Akihiko; Pavlov, Youri; Murate, Takashi; Takahashi, Takashi

    2009-07-01

    Translesion DNA synthesis (TLS) involves PCNA mono-ubiquitination and TLS DNA polymerases (pols). Recent evidence has shown that the mono-ubiquitination is induced not only by DNA damage but also by other factors that induce stalling of the DNA replication fork. We studied the effect of spontaneous DNA replication errors on PCNA mono-ubiquitination and TLS induction. In the pol1L868F strain, which expressed an error-prone pol alpha, PCNA was spontaneously mono-ubiquitinated. Pol alpha L868F had a rate-limiting step at the extension from mismatched primer termini. Electron microscopic observation showed the accumulation of a single-stranded region at the DNA replication fork in yeast cells. For pol alpha errors, pol zeta participated in a generation of +1 frameshifts. Furthermore, in the pol1L868F strain, UV-induced mutations were lower than in the wild-type and a pol delta mutant strain (pol3-5DV), and deletion of the RAD30 gene (pol eta) suppressed this defect. These data suggest that nucleotide misincorporation by pol alpha induces exposure of single-stranded DNA, PCNA mono-ubiquitination and activates TLS pols.

  10. EXPANSIÓN Y DIVERGENCIA DEL LOCUS GH ENTRE EL MONO ARAÑA Y EL CHIMPANCÉ

    OpenAIRE

    DE MENDOZA, AGNÈS; ESQUIVEL, DOLORES; MARTÍNEZ, IRMA; BARRERA, HUGO

    2005-01-01

    Para precisar la historia muy particular de la hormona del crecimiento (GH) en los primates, se describieron los loci GH del mono araña, un mono del Nuevo Mundo y del chimpancé, una especie cercana al humano. Al menos seis genes integran ambos loci GH: todos del tipo GH en el mono araña, y dos GHs y cuatro lactógenos placentarios (PLs) en el chimpancé. Las regiones intergénicas del locus del chimpancé presentan un tamaño mayor a las del mono araña. Este trabajo conf...

  11. Impact of temperature on performance of series and parallel connected mono-crystalline silicon solar cells

    Directory of Open Access Journals (Sweden)

    Subhash Chander

    2015-11-01

    Full Text Available This paper presents a study on impact of temperature on the performance of series and parallel connected mono-crystalline silicon (mono-Si solar cell employing solar simulator. The experiment was carried out at constant light intensity 550 W/m2with cell temperature in the range 25–60 oC for single, series and parallel connected mono-Si solar cells. The performance parameters like open circuit voltage, maximum power, fill factor and efficiency are found to decrease with cell temperature while the short circuit current is observed to increase. The experimental results reveal that silicon solar cells connected in series and parallel combinations follow the Kirchhoff’s laws and the temperature has a significant effect on the performance parameters of solar cell.

  12. Imaging the magmatic system of Mono Basin, California with magnetotellurics in three--dimensions

    Science.gov (United States)

    Peacock, Jared R.; Mangan, Margaret T.; McPhee, Darcy K.; Ponce, David A.

    2015-01-01

    A three–dimensional (3D) electrical resistivity model of Mono Basin in eastern California unveils a complex subsurface filled with zones of partial melt, fluid–filled fracture networks, cold plutons, and regional faults. In 2013, 62 broadband magnetotelluric (MT) stations were collected in an array around southeastern Mono Basin from which a 3D electrical resistivity model was created with a resolvable depth of 35 km. Multiple robust electrical resistivity features were found that correlate with existing geophysical observations. The most robust features are two 300 ± 50 km3 near-vertical conductive bodies (3–10 Ω·m) that underlie the southeast and north-eastern margin of Mono Craters below 10 km depth. These features are interpreted as magmatic crystal–melt mush zones of 15 ± 5% interstitial melt surrounded by hydrothermal fluids and are likely sources for Holocene eruptions. Two conductive east–dipping structures appear to connect each magma source region to the surface. A conductive arc–like structure (resistivity (200 Ω·m) suggestive of a cooled connection. A third, less constrained conductive feature (4–10 Ω·m) 15 km deep extending to 35 km is located west of Mono Craters near the eastern front of the Sierra Nevada escarpment, and is coincident with a zone of sporadic, long–period earthquakes that are characteristic of a fluid-filled (magmatic or metamorphic) fracture network. A resistive feature (103–105 Ω·m) located under Aeolian Buttes contains a deep root down to 25 km. The eastern edge of this resistor appears to structurally control the arcuate shape of Mono Craters. These observations have been combined to form a new conceptual model of the magmatic system beneath Mono Craters to a depth of 30 km.

  13. Algunas reflexiones sobre las representaciones sociales y prácticas de los profesionales de salud escolar Some reflections about social representation and practice of scholastic health professionals

    Directory of Open Access Journals (Sweden)

    Mariana Funes Molineri

    2009-12-01

    Full Text Available Este trabajo es un recorte del proyecto "Representaciones Sociales y Práctica Profesional de Equipos Interdisciplinarios del Programa de Salud Escolar del Gobierno de la Ciudad de Buenos Aires", (PROINPSI, UBA. Dir.: Mariana Funes Molineri, cuyo objetivo es describir las representaciones sociales sobre la propia práctica de los profesionales de los equipos de Salud Escolar y la relación entre éstas y su quehacer cotidiano. Metodología: Es un estudio exploratorio descriptivo de tipo cualitativo. Se realizaron once entrevistas semidirigidas a profesionales de distintas disciplinas pertenecientes al programa. El objetivo de esta presentación es describir y analizar las tensiones que subyacen a las representaciones sociales que los profesionales entrevistados poseen de su práctica, considerando los atravesamientos institucionales que las determinan. Conclusiones: Las ideas respecto a su tarea presentan distintas zonas de tensión: entre prevención y asistencia, entre lo clínico y lo comunitario, entre cantidad y calidad y entre abordaje disciplinario e interdisciplinario.The current task is a part of the research Project: "Social Representation and Professional Interdisciplinary Practice Programme of the City of Buenos Aires City Hall"(PROINPSI, UBA. Dir.: Mariana Funes Molineri. Its objective is to describe the social representations considering the practice of the professionals that take part in the School Health teams, and the connection between them and their daily routine. Methodology: It is an exploratory, descriptive and qualitative research. Interviews have been done to eleven professionals who belong to different fields within the programme. The aim of this presentation is to describe and to analyze the tensions underlying of the social representation that tint the practice of the professionals interviewed, taking into account the institutional obstructions which determine it. Conclusions: The concept of these professionals with

  14. Strenuous running exacerbates knee cartilage erosion induced by low amount of mono-iodoacetate in rats

    OpenAIRE

    Saito, Ryusuke; Muneta, Takeshi; Ozeki, Nobutake; Nakagawa, Yusuke; Udo, Mio; Yanagisawa, Katsuaki; Tsuji, Kunikazu; Tomita, Makoto; Koga, Hideyuki; Sekiya, Ichiro

    2017-01-01

    Background It is still debated whether strenuous running in the inflammatory phase produces beneficial or harmful effect in rat knees. We examined (1) the dropout rate of rats during a 30-km running protocol, (2) influences of strenuous running and/or low amounts of mono-iodoacetate injection on cartilage, and (3) the effect of strenuous running on synovitis. Methods Rats were forced to run 30?km over 6?weeks and the dropout rate was examined. One week after 0.1?mg mono-iodoacetate was inject...

  15. Method for separating mono- and di-octylphenyl phosphoric acid esters

    International Nuclear Information System (INIS)

    Arnold, W.D. Jr.

    1977-01-01

    A method for separating mono-octylphenyl phosphoric acid ester and di-octylphenyl phosphoric acid ester from a mixture thereof comprises reacting the ester mixture with a source of lithium or sodium ions to form a mixture of the phosphate salts; contacting the salt mixture with an organic solvent which causes the dioctylphenyl phosphate salt to be dissolved in the organic solvent phase and the mono-octylphenyl phosphate salt to exist in a solid phase; separating the phases; recovering the phosphate salts from their respective phases; and acidifying the recovered salts to form the original phosphoric acid esters

  16. Tritium enrichment from aqueous solutions using cryosublimation of mono- and polysaccharides

    International Nuclear Information System (INIS)

    Wierczinski, B.; Muellen, G.; Rosenhauer, S.

    2008-01-01

    Cryosublimation is one technique, which allows the accumulation of tritium from aqueous solutions using certain chemical compounds. After studying several inorganic compounds such as zeolites and metal salts, as well as some humic substances, we have now investigated several mono- and polysaccharides, such as glucose, maltose, galactose, starch, agar, and gelatine. Except for starch all of the above mentioned compounds showed a clear enrichment of tritium. The highest value was reached for Agartine, which gave an enrichment factor of 6.2. Since mono- and polysaccharides form weak hydrogen bonds, these results prove again our theory that tritium is preferably accumulated in exchangeable hydrogen bonds. (author)

  17. 2 keV filters of quasi-mono-energetic neutrons

    International Nuclear Information System (INIS)

    Adib, M.; Habib, N.; El-Mesiry, M.S.; Bashter, I.I.; Saleh, A.; Fathallah, M.

    2013-01-01

    A simulation study for the production of 2 keV filters of quasi-mono-energetic neutrons based on the deep interference minima in the 45 Sc total cross-section was carried out. A computer code QMENF-II was adapted to calculate the optimum amounts of the 45 Sc as a main filter element and additional component ones to obtain sufficient intensity at high resolution and purity of the filtered quasi-mono-energetic neutrons. The emitted neutron spectrum from nuclear reactor and from the reaction of 2.6 MeV protons on a lithium fluoride target at the accelerator beam port, are used for simulation

  18. Aza-Michael Mono-addition Using Acidic Alumina under Solventless Conditions

    Directory of Open Access Journals (Sweden)

    Giovanna Bosica

    2016-06-01

    Full Text Available Aza-Michael reactions between primary aliphatic and aromatic amines and various Michael acceptors have been performed under environmentally-friendly solventless conditions using acidic alumina as a heterogeneous catalyst to selectively obtain the corresponding mono-adducts in high yields. Ethyl acrylate was the main acceptor used, although others such as acrylonitrile, methyl acrylate and acrylamide were also utilized successfully. Bi-functional amines also gave the mono-adducts in good to excellent yields. Such compounds can serve as intermediates for the synthesis of anti-cancer and antibiotic drugs.

  19. Parásitos intestinales en monos congo Alouatta palliata (Primates: Cebidae de Costa Rica

    Directory of Open Access Journals (Sweden)

    Misael Chinchilla Carmona

    2005-09-01

    Full Text Available Se estudiaron las heces de 102 monos de la especie Alouatta palliata (monos aulladores o congos de las siguientes regiones de Costa Rica. Valle Central: San Ramón (Alajuela; Pacífico Central: Isla Chira y Parque Manuel Antonio (Puntarenas; Pacífico Norte: Palo Verde, Playa Potrero, Nicoya (Guanacaste y Caribe: Cahuita (Limón. Los animales capturados fueron anestesiados con dardos conteniendo Telazol®. La mayoría defecaron espontáneamente o se les estimulaba a defecar. Las muestras se estudiaron en el laboratorio en forma directa en solución salina (0.85% y una solución de yodo o teñidas con hematoxilina para identificar los parásitos correspondientes. El material fue cultivado en el medio de Dobell para determinar la presencia de amebas y flagelados. Se encontraron helmintos de los géneros Trypanoxyuris, Strongyloides y Controrchis y protozoarios de los géneros Endolimax, Entamoeba, Trichomonas y Giardia. Los porcentajes de infección por protozoarios oscilaron entre 16.7% y 80% y se encontraron helmintos en un 3.4% a un 80% de los animales de acuerdo con la zona estudiada. No se encontraron diferencias importantes de parasitosis relacionadas con el sexo pero si existió mayor infección en los animales más jóvenes. Se establece la relación entre los índices de infección y algunos parámetros tales como las áreas estudiadas, el peso de los animales y el contacto con el ser humano.Intestinal parasites in howler monkeys Alouatta palliata (Primates: Cebidae of Costa Rica. Fecal samples of 102 howler monkeys (Alouatta palliata from several sites of Costa Rica were studied for intestinal parasites. The zones studied were: Central Valley (San Ramón, Alajuela, Central Pacific (Chomes and Manuel Antonio National Park, Puntarenas, North Pacific (Palo Verde Park and Playa Potrero, Guanacaste, Chira Island in the Nicoya Gulf and Caribean area (Cahuita, Limón. Animals were anesthetized with dards containing Telazol in order to collect

  20. Sobre dos maneras de enfocar lo político en las eras de los medios masivos y de internet: representaciones y poder

    OpenAIRE

    Bruno Ollivier

    2004-01-01

    Proponemos una reflexión sobre algunos cambios que la comunicación, a través de las redes informáticas, hace posible en la producción de representaciones, la forma de los debates y las tomas de decisión, es decir, en la producción de lo político. Si la decisión política, la manera de debatir y las estructuras del poder tienen un fundamento comunicacional, se pueden distinguir varios modos de comunicación que corresponden a la aparición y a la consolidación histórica de cada medio de comunicac...

  1. Representaciones sociales en torno al “conflicto” estado chileno - pueblo mapuche en jóvenes universitarios chilenos: un estudio con redes semánticas naturales

    Directory of Open Access Journals (Sweden)

    Marianela Denegri Coria

    2015-01-01

    Full Text Available Esta investigación tuvo como propósito realizar una primera aproxi - mación a las representaciones sociales sobre el “conflicto estado-nación y pueblo mapuche”, en estudiantes universitarios del área de Ciencias Sociales de una universidad estatal del sur de Chile. Se trabajó con la técnica de redes semánticas naturales, utilizando cuatro frases- estímulo. Los resultados indican que existe una percepción de la circunstancia en la que se resalta la situación de conflicto, con una mirada muy negativa con respecto al gobierno, el sistema judicial, y los medios de comunicación. Se discuten las implicancias para el futuro desempeño profesional de estos estudiantes en caso de desen - volverse en un contexto laboral de intervención directa o indirecta en este conflicto.

  2. “Quiero para mis Hijos una infancia feliz” “Socialización y cambio en torno a las representaciones sociales sobre la infancia”

    Directory of Open Access Journals (Sweden)

    Yolanda Puyana Villamizar

    1999-10-01

    Full Text Available En el articulo se presentan las características del cambio en las representaciones que fundamentan la socialización entre grupos de mujeres de sectores populares, demostrándose como de un énfasis en las tareas productivas que niños y niñas debían cumplir, se va pasando a un interés por la educación formal, como medio de ascenso social. Así mismo, de un estilo autoritario y distante que usaban que usaba el castigo físico, se pasa a unas formas educativas que giran en torno a la permisividad, a cierto desconcierto o al dialogo. Se fundamenta en una investigación con base en historias de vida en la región cundiboyacense, en Bolívar y en Santander.

  3. Las representaciones de la maternidad, la paternidad y la relación de pareja en un grupo de madres y padres adolescentes chilenos

    OpenAIRE

    Abbott Matus, Verónica Lucía

    2016-01-01

    Tesis doctoral inédita leída en la Universidad Autónoma de Madrid, Facultad de Psicología, Departamento Interfacultativo de Psicología Evolutiva y de la Educación Esta tesis se basa en un trabajo anterior del año 2002 llevado a cabo con 25 mujeres chilenas, entre 25-35 años, que esperaban su primer hijo y que recibían su información y cuidados en un consultorio1 en la ciudad de La Serena2, Chile. Realizamos entrevistas y análisis de su discurso con el objetivo de evaluar las representacion...

  4. Representaciones sociales en torno al "conflicto" estado chileno - pueblo mapuche en jóvenes universitarios chilenos: un estudio con Redes semánticas naturales

    Directory of Open Access Journals (Sweden)

    Marianela Denegri Coria

    2015-09-01

    Full Text Available Esta investigación tuvo como propósito realizar una primera aproximación a las representaciones sociales sobre el "conflicto estado-nación y pueblo mapuche", en estudiantes universitarios del área de Ciencias Sociales de una universidad estatal del sur de Chile. Se trabajó con la técnica de redes semánticas naturales, utilizando cuatro frases-estímulo. Los resultados indican que existe una percepción de la circunstancia en la que se resalta la situación de conflicto, con una mirada muy negativa con respecto al gobierno, el sistema judicial, y los medios de comunicación. Se discuten las implicancias para el futuro desempeño profesional de estos estudiantes en caso de desenvolverse en un contexto laboral de intervención directa o indirecta en este conflicto.

  5. Pura Fernández et Marie-Linda Ortega (eds., La mujer de letras o la letraherida, discursos y representaciones sobre la mujer escritora en el sigloxix

    Directory of Open Access Journals (Sweden)

    Marie-Aline Barrachina

    2010-01-01

    Full Text Available Cet ouvrage se présente comme l’aboutissement d’une « Action intégrée »  hispano française sur le thème : « La mujer de letras o la letraherida : textos y representaciones del discurso médico-social y cultural sobre la mujer escritora en el siglo xix/ La femme de lettres en femmes malade en Espagne au xixe s. ». D’emblée, et avant même que d’aborder la description de l’ouvrage, il convient de faire appel aux précisions fournies par les éditrices afin d’éclairer dans le titre un terme que la n...

  6. Programming

    International Nuclear Information System (INIS)

    Jackson, M.A.

    1982-01-01

    The programmer's task is often taken to be the construction of algorithms, expressed in hierarchical structures of procedures: this view underlies the majority of traditional programming languages, such as Fortran. A different view is appropriate to a wide class of problem, perhaps including some problems in High Energy Physics. The programmer's task is regarded as having three main stages: first, an explicit model is constructed of the reality with which the program is concerned; second, this model is elaborated to produce the required program outputs; third, the resulting program is transformed to run efficiently in the execution environment. The first two stages deal in network structures of sequential processes; only the third is concerned with procedure hierarchies. (orig.)

  7. Programming

    OpenAIRE

    Jackson, M A

    1982-01-01

    The programmer's task is often taken to be the construction of algorithms, expressed in hierarchical structures of procedures: this view underlies the majority of traditional programming languages, such as Fortran. A different view is appropriate to a wide class of problem, perhaps including some problems in High Energy Physics. The programmer's task is regarded as having three main stages: first, an explicit model is constructed of the reality with which the program is concerned; second, thi...

  8. The duality of XML Markup and Programming notation

    DEFF Research Database (Denmark)

    Nørmark, Kurt

    2003-01-01

    In web projects it is often necessary to mix XML notation and program notation in a single document or program. In mono-lingual situations, the XML notation is either subsumed in the program or the program notation is subsumed in the XML document. As an introduction we analyze XML notation and pr...

  9. Three-Dimensional Analysis of dike/fault interaction at Mono Basin (California) using the Finite Element Method

    Science.gov (United States)

    La Marra, D.; Battaglia, M.

    2013-12-01

    Mono Basin is a north-trending graben that extends from the northern edge of Long Valley caldera towards the Bodie Hills and is bounded by the Cowtrack Mountains on the east and the Sierra Nevada on the west. The Mono-Inyo Craters volcanic chain forms a north-trending zone of volcanic vents extending from the west moat of the Long Valley caldera to Mono Lake. The Hartley Springs fault transects the southern Mono Craters-Inyo Domes area between the western part of the Long Valley caldera and June Lake. Stratigraphic data suggest that a series of strong earthquakes occurred during the North Mono-Inyo eruption sequence of ~1350 A.D. The spatial and temporal proximity between Hartley Springs Fault motion and the North Mono-Inyo eruption sequence suggests a possible relation between seismic events and eruptions. We investigate the interactions between slip along the Hartley Springs fault and dike intrusion beneath the Mono-Inyo craters using a three-dimensional finite element model of the Mono Basin. We employ a realistic representation of the Basin that includes topography, vertical and lateral heterogeneities of the crust, contact relations between fault planes, and a physical model of the pressure required to propagate the dike. We estimate (a) the distribution of Coulomb stress changes to study the influence of dike intrusion on Hartley Springs fault, and (b) the local stress and volumetric dilatation changes to understand how fault slip may influence the propagation of a dike towards the surface.

  10. Desarrollo de conocimiento ortográfico en niños: formación de representaciones ortográficas y aprendizaje de reglas contextuales

    Directory of Open Access Journals (Sweden)

    Marina Ferroni

    2016-01-01

    Full Text Available En este estudio se analizó el desarrollo de conocimiento ortográfico de niños en el marco de un programa de intervención de aulas educativas en el que participaron 74 niños argentinos que cursaban 3er grado de la escuela primaria y que fueron ubicados en dos grupos: 36 niños en un grupo de intervención y 38 en un grupo control. Con el grupo de intervención, se realizó una secuencia didáctica para promover la formación de representaciones ortográficas léxicas y sub-léxicas y el aprendizaje de reglas contextuales. La comparación postest entre grupos mostró un desempeño superior del grupo de intervención en la escritura de las palabras entrenadas. También se evaluaron ambos grupos en la escritura de palabras de transferencia, palabras no específicamente trabajadas en la intervención pero que compartían reglas ortográficas, sílabas o morfemas con las palabras entrenadas. Los resultados postest mostraron que el grupo de intervención escribió significativamente mejor que el grupo control las palabras de transferencia con las mismas reglas ortográficas contextuales pero no con las que incluían cadenas subléxicas idénticas a las de las palabras de entrenamiento. Se concluye que la intervención realizada benefició la transferencia de reglas contextuales pero no de representaciones ortográficas subléxicas para la escritura de palabras desconocidas.

  11. Universidad, construcción de la identidad social y desarrollo de la autonomía: representaciones sociales acerca del título universitario.

    Directory of Open Access Journals (Sweden)

    Laura Andrea Bustamante

    2014-08-01

    Full Text Available En este artículo daremos cuenta de los resultados obtenidos a partir de nuestro  proyecto de investigación en curso, cuyo objetivo general es analizar las representaciones sociales de los jóvenes que ingresan a una carrera universitaria acerca de la universidad y del estudio universitario. Para abordar dicho objetivo se ha empleado un diseño metodológico cualitativo en donde se utiliza como técnica de investigación la entrevista, sobre una población de estudiantes ingresantes de las principales universidades de la ciudad de Córdoba, Argentina. Los datos fueron analizados a través del método comparativo constante, lo que permitió construir un mapeo semántico de las principales nociones asociadas a la Universidad. Lo distintivo en este artículo es la profundización en la categoría representaciones del título universitario, la cual ha sido interpretada en relación con el concepto de identidad. Las conclusiones permiten anticipar que el título se constituye en un medio de construcción de la identidad del joven universitario y como elemento favorecedor de su independencia. Sin embargo, evidenciamos que la constitución de la autonomía del joven es un proceso incipiente, sobre el cual resulta necesario trabajar desde las universidades, puesto que la misma se torna en un proceso psicosocial determinante para el tránsito universitario.

  12. Consonancias y armonías fingidas : la vinculación entre la música y la lisonja en las representaciones artísticas

    Directory of Open Access Journals (Sweden)

    María Paz López-Peláez Casellas

    2004-01-01

    Full Text Available Los emblemas que utilizan la figura de un ciervo sucumbiendo a la música originada por unos instrumentistas es una de las imágenes que se utilizaron en los tratados barrocos para hacer referencia a la lisonja. Partiendo de la mítica atracción que el animal sentía hacia los sonidos armoniosos, en estas representaciones se identificaba a los instrumentistas con cazadores y al ciervo con el adulado, llegando en ocasiones a ser utilizada esta imagen como símbolo del monarca y de los peligros que le acechaban en la Corte. En este artículo comentaremos algunas de las más interesantes representaciones que de este tipo se realizaron en la emblemática y analizaremos de manera detallada la interesante connotación musical que se deriva de identificar la mentira a los sonidos dulces y armoniosos y la verdad a lo desagradable de oír.Emblems employing the figure of a deer yielding to the music created by instrumentists are included in Early Modern treatises in order to allude to flattering. Stemming from the legendary attraction that this animal felt towards harmonious sounds, these images identified instrumentists with hunters, and then with flatterers, and the deer with the flattered, to the extent that this image was at times associated as a symbol of the monarch and the dangers awaiting at the court. This article deals with some of the most significant emblems of this kind. We will analyze in detail the musical connotations derived from identifying lying with sweet and harmonious sounds, and truth with those which are unpleasant to the ear.

  13. Las representaciones sociales de la ESCNNA y su relación con los paradigmas co-existentes en el campo de la niñez.

    Directory of Open Access Journals (Sweden)

    Graciela Dilacio

    2012-05-01

    Full Text Available Este artículo se propone analizar las representaciones sobre la ESCNNA de operadores sociales de cuatro ciudades situadas en la frontera uruguayo-brasileña, su incidencia en la interpretación de las referidas situaciones y su relación con los principales paradigmas actualmente coexistentes en el campo de la niñez. Estas representaciones son relevantes en tanto condicionan las prácticas concretas de personas, organizaciones e instituciones ante las diferentes modalidades de la ESCNNA. No se trata de opiniones individuales, sino que impregnan las culturas de las instituciones responsables de desarrollar políticas de prevención, enfrentamiento y restitución de derechos de los y las personas afectadas por estas prácticas delictivas. A su vez su análisis nos proporcionará indicios para comprender las diferentes actitudes ante las situaciones de ESCNNA: naturalización, negación de su existencia, culpabilización de las víctimas, entre otras; y de los lugares que se asignan a los diferentes actores involucrados en la producción y reproducción del fenómeno. El trabajo de campo del que surge el material empírico en que se basa el trabajo es parte del proyecto “Estrategia regional de lucha contra la trata y el tráfico de niñas, niños y adolescentes para fines de explotación sexual en MERCOSUR”. El mismo, en Uruguay se focaliza en cuatro ciudades fronterizas con Brasil: Bella Unión; Rivera: Río Branco y Chuy. En una primera etapa se realizaron cerca de cien entrevistas en profundidad que permitieron contar con una aproximación diagnóstica del fenómeno en dichas ciudades.

  14. Desconocimiento social, exotismo y discriminación racial: representaciones y prácticas hacia migrantes africanos en la sociedad argentina

    Directory of Open Access Journals (Sweden)

    Orlando Morales

    2017-12-01

    Full Text Available Este artículo desarrolla dos cuestiones que consideramos de interés en relación con la integración de migrantes africanos recientes en la sociedad argentina, donde la negritud y la afrodescendencia han sido históricamente negadas e invisibilizadas: sus identificaciones sociales; y las representaciones y prácticas que los construyen como Otros. El corpus de análisis que retoma el artículo corresponde a una investigación desarrollada entre los años 2008 y 2014, que interpeló a través de una aproximación etnográfica, con observación participante y entrevistas abiertas y semi-estructuradas, a un grupo de migrantes procedentes de África y radicados desde la década de 2000 en las ciudades de Buenos Aires y La Plata (Argentina. Con base en ese corpus describimos las identificaciones de los migrantes, en tensión con un imaginario social dominante en la sociedad mayor que representa a las personas socialmente construidas como negras y de origen africano en términos de diferentes, exóticas, desconocidas y objeto de discriminación. Luego avanzamos puntualmente sobre el desconocimiento social, el exotismo y la discriminación racial en tanto representaciones y prácticas recurrentes hacia los migrantes africanos, que entregan elementos de conocimiento sobre las (discontinuidades de la invisibilización de lo africano y lo negro en Argentina.

  15. Laboratory Directed Research and Development (LDRD) on Mono-uranium Nitride Fuel Development for SSTAR and Space Applications

    International Nuclear Information System (INIS)

    Choi, J; Ebbinghaus, B; Meiers, T; Ahn, J

    2006-01-01

    The US National Energy Policy of 2001 advocated the development of advanced fuel and fuel cycle technologies that are cleaner, more efficient, less waste-intensive, and more proliferation resistant. The need for advanced fuel development is emphasized in on-going DOE-supported programs, e.g., Global Nuclear Energy Initiative (GNEI), Advanced Fuel Cycle Initiative (AFCI), and GEN-IV Technology Development. The Directorates of Energy and Environment (E and E) and Chemistry and Material Sciences (C and MS) at Lawrence Livermore National Laboratory (LLNL) are interested in advanced fuel research and manufacturing using its multi-disciplinary capability and facilities to support a design concept of a small, secure, transportable, and autonomous reactor (SSTAR). The E and E and C and MS Directorates co-sponsored this Laboratory Directed Research and Development (LDRD) Project on Mono-Uranium Nitride Fuel Development for SSTAR and Space Applications. In fact, three out of the six GEN-IV reactor concepts consider using the nitride-based fuel, as shown in Table 1. SSTAR is a liquid-metal cooled, fast reactor. It uses nitride fuel in a sealed reactor vessel that could be shipped to the user and returned to the supplier having never been opened in its long operating lifetime. This sealed reactor concept envisions no fuel refueling nor on-site storage of spent fuel, and as a result, can greatly enhance proliferation resistance. However, the requirement for a sealed, long-life core imposes great challenges to research and development of the nitride fuel and its cladding. Cladding is an important interface between the fuel and coolant and a barrier to prevent fission gas release during normal and accidental conditions. In fabricating the nitride fuel rods and assemblies, the cladding material should be selected based on its the coolant-side corrosion properties, the chemical/physical interaction with the nitride fuel, as well as their thermal and neutronic properties. The US

  16. Experimental damping assessment of a full scale offshore mono bucket foundation

    DEFF Research Database (Denmark)

    Gres, Szymon; Fejerskov, Morten; Ibsen, Lars Bo

    2016-01-01

    This paper quantifies the system damping of a offshore meteorological mast supported by a Mono Bucket foundation based on a long-term experimental campaign. The structure is located at Dogger Bank west, North Sea, and equipped with a measurement system monitoring acceleration, strain, inclination...

  17. 21 CFR 172.856 - Propylene glycol mono- and diesters of fats and fatty acids.

    Science.gov (United States)

    2010-04-01

    ... fatty acids. 172.856 Section 172.856 Food and Drugs FOOD AND DRUG ADMINISTRATION, DEPARTMENT OF HEALTH... diesters of fats and fatty acids. Propylene glycol mono- and diesters of fats and fatty acids may be safely... and/or fatty acids in compliance with § 172.860 and/or oleic acid derived from tall oil fatty acids in...

  18. Elimination of Cu (II) and Zn (II) ions in mono-element and the bi ...

    African Journals Online (AJOL)

    Elimination of Cu (II) and Zn (II) ions in mono-element and the bi-element aqueous solutions by adsorption on natural clay of Bikougou (Gabon) ... The modeling of the experimental results is better achieved by application of. Freundlich adsorption isotherm and Langmuir adsorption isotherm concerning the adsorption of Cu ...

  19. Emotions in freely varying and mono-pitched vowels, acoustic and EGG analyses.

    Science.gov (United States)

    Waaramaa, Teija; Palo, Pertti; Kankare, Elina

    2015-12-01

    Vocal emotions are expressed either by speech or singing. The difference is that in singing the pitch is predetermined while in speech it may vary freely. It was of interest to study whether there were voice quality differences between freely varying and mono-pitched vowels expressed by professional actors. Given their profession, actors have to be able to express emotions both by speech and singing. Electroglottogram and acoustic analyses of emotional utterances embedded in expressions of freely varying vowels [a:], [i:], [u:] (96 samples) and mono-pitched protracted vowels (96 samples) were studied. Contact quotient (CQEGG) was calculated using 35%, 55%, and 80% threshold levels. Three different threshold levels were used in order to evaluate their effects on emotions. Genders were studied separately. The results suggested significant gender differences for CQEGG 80% threshold level. SPL, CQEGG, and F4 were used to convey emotions, but to a lesser degree, when F0 was predetermined. Moreover, females showed fewer significant variations than males. Both genders used more hypofunctional phonation type in mono-pitched utterances than in the expressions with freely varying pitch. The present material warrants further study of the interplay between CQEGG threshold levels and formant frequencies, and listening tests to investigate the perceptual value of the mono-pitched vowels in the communication of emotions.

  20. Some transition metal complexes derived from mono- and di-ethynyl perfluorobenzenes

    NARCIS (Netherlands)

    Armitt, D.J.; Bruce, M.I.; Gaudio, M.; Zaitseva, N.N.; Skelton, B.W.; White, A.H.; Le Guennic, B.; Halet, J.-F.; Fox, M.A.; Roberts, R.L.; Hartl, F.; Low, P.J.

    2008-01-01

    Transition metal alkynyl complexes containing perfluoroaryl groups have been prepared directly from trimethylsilyl-protected mono- and di-ethynyl perfluoroarenes by simple desilylation/metallation reaction sequences. Reactions between Me3SiC CC6F5 and RuCl(dppe)Cp'[Cp' = Cp, Cp*] in the presence of

  1. Nuchal translucency measurements are highly correlated in both mono- and dichorionic twin pairs

    DEFF Research Database (Denmark)

    Wøjdemann, Karen R; Larsen, Severin Olesen; Shalmi, Anne-Cathrine

    2006-01-01

    OBJECTIVES: To establish the distribution of serological and ultrasound first-trimester Down syndrome markers in twins and identify correlations of significance for risk calculation. METHODS: Nuchal translucency (NT), PAPP-A and betahCG data were extracted from 181 twin pregnancies (31 mono- and ...

  2. IRIS Toxicological Review of Ethylene Glycol Mono-Butyl Ether (Egbe) (Interagency Science Discussion Draft)

    Science.gov (United States)

    EPA released the draft report, Toxicological Review for Ethylene Glycol Mono-Butyl Ether , that was distributed to Federal agencies and White House Offices for comment during the Science Discussion step of the IRIS Assessment Development Process. Comments received from ot...

  3. Conformational studies on pertrimethylsilyl derivatives of some mono- and disaccharides by 220 MHz PMR spectroscopy

    NARCIS (Netherlands)

    Vliegenthart, J.F.G.; Streefkerk, D.G.; Bie, M.J.A. de

    1973-01-01

    The complete interpretation of 220 MHz PMR spectra and the accurate chemical shifts and coupling constants, obtained after computer simulation of the spectra, of a number of TMS-mono and -disaccharides are given. By means of an adapted Karplus equation the conformation of the derivatives has been

  4. Elevated levels of homocysteine increase IL-6 production in monocytic Mono Mac 6 cells

    NARCIS (Netherlands)

    van Aken, B. E.; Jansen, J.; van Deventer, S. J.; Reitsma, P. H.

    2000-01-01

    Hyperhomocysteinemia is a risk factor for atherosclerosis and thrombosis. The aim of this study was to analyze if exposure of monocytic cells to increased levels of homocysteine (HCY) induces the accumulation of inflammatory mediators. Interleukin (IL)-6 production by monocytic cell line Mono Mac 6

  5. The Effects of Operational Parameters on a Mono-wire Cutting System: Efficiency in Marble Processing

    Science.gov (United States)

    Yilmazkaya, Emre; Ozcelik, Yilmaz

    2016-02-01

    Mono-wire block cutting machines that cut with a diamond wire can be used for squaring natural stone blocks and the slab-cutting process. The efficient use of these machines reduces operating costs by ensuring less diamond wire wear and longer wire life at high speeds. The high investment costs of these machines will lead to their efficient use and reduce production costs by increasing plant efficiency. Therefore, there is a need to investigate the cutting performance parameters of mono-wire cutting machines in terms of rock properties and operating parameters. This study aims to investigate the effects of the wire rotational speed (peripheral speed) and wire descending speed (cutting speed), which are the operating parameters of a mono-wire cutting machine, on unit wear and unit energy, which are the performance parameters in mono-wire cutting. By using the obtained results, cuttability charts for each natural stone were created on the basis of unit wear and unit energy values, cutting optimizations were performed, and the relationships between some physical and mechanical properties of rocks and the optimum cutting parameters obtained as a result of the optimization were investigated.

  6. Production of pulse in mono-cropped rice system in the coastal region of Eastern India

    International Nuclear Information System (INIS)

    Khan, A.R.; Nanda, P.; Chandra, Dinesh; Ghorai, A.K.; Behera, M.S.

    2001-04-01

    This experiment was undertaken with an objective to increase the yield of black-gram leguminous pulse crop through optimal doses of phosphatic fertilizer with supplemental irrigation in mono-cropped rice-fallow regions of India. Irrigation and phosphorus fertilizer application were introduced for enhancing productivity of black-gram to provide better returns to available water resources

  7. Retrograde axoplasmic flow of serotonin in central mono-aminergic neurons

    International Nuclear Information System (INIS)

    Leger, Lucienne; Pujol, J.-F.; Bobillier, Pierre; Jouvet, Michel

    1977-01-01

    Following an injection of 3 H-5 HT in the neostriatum of the Rat, the tracer is transported by axoplasmic retrograde flow to the cell groups containing mono-aminergic neurons which are known or thought to have afferences to this structure: substantia nigra, dopaminergic group A8 and n. raphe dorsalis [fr

  8. Endotoxin testing of proteins for parenteral administration using the Mono Mac 6 assay

    DEFF Research Database (Denmark)

    Moesby, Lise; Hansen, E W; Christensen, J D

    2000-01-01

    Pharmaceutical products containing proteins cause problems in testing for endotoxin and pyrogens. Many proteins interfere with the LAL test and the proteins are immunogenic in rabbits. The monocytic cell line Mono Mac 6 is an alternative assay for detection of endotoxin and other pyrogens....

  9. Tri-block copolymers with mono-disperse crystallizable diamide segments: synthesis, analysis and rheological properties

    NARCIS (Netherlands)

    Araichimani, A.; Gaymans, R.J.

    2008-01-01

    Tri-block copolymers with polyether mid-segments and mono-disperse amide end segments were synthesized, analyzed and some properties studied. The end segment was an aromatic diamide (diaramide, TΦB). The polyether mid-segment was a difunctional poly(tetramethylene oxide) (PTMO, 1000 and 2900 g/mol).

  10. The nest predator assemblage for songbirds in Mono Lake basin riparian habitats

    Science.gov (United States)

    Quresh S. Latif; Sacha K. Heath; Grant Ballard

    2012-01-01

    Because nest predation strongly limits avian fitness, ornithologists identify nest predators to inform ecological research and conservation. During 2002–2008, we used both video-monitoring of natural nests and direct observations of predation to identify nest predators of open-cup nesting riparian songbirds along tributaries of Mono Lake, California. Video cameras at...

  11. Health Disparities and Relational Well-Being between Multi- and Mono-Ethnic Asian Americans

    Science.gov (United States)

    Zhang, Wei

    2013-01-01

    Focusing on Hawaii, a state with 21.3% of the population being multi-racial according to the 2010 U.S. Census, this study aims to examine the existence and nature of health disparities between mono- and multi-ethnic Asian Americans and the importance of Relational Well-Being in affecting the health of Asian Americans. A series of ordinary least…

  12. Ultrasonication of pyrogenic microorganisms improves the detection of pyrogens in the Mono Mac 6 assay

    DEFF Research Database (Denmark)

    Moesby, Lise; Hansen, E W; Christensen, J D

    2000-01-01

    The monocytic cell line Mono Mac 6 is sensitive to pyrogens. When exposed to pyrogens secretion of interleukin-6 is induced. However, some eukaryotic pyrogenic microorganisms are not detectable. The aim of this study is to introduce a pretreatment of samples to expand the detection range of the a...

  13. Water miscible mono alcohols' effect on the proteolytic performance of Bacillus clausii serine alkaline protease.

    Science.gov (United States)

    Duman, Yonca Avci; Kazan, Dilek; Denizci, Aziz Akin; Erarslan, Altan

    2014-01-01

    In this study, our investigations showed that the increasing concentrations of all examined mono alcohols caused a decrease in the Vm, kcat and kcat/Km values of Bacillus clausii GMBE 42 serine alkaline protease for casein hydrolysis. However, the Km value of the enzyme remained almost the same, which was an indicator of non-competitive inhibition. Whereas inhibition by methanol was partial non-competitive, inhibition by the rest of the alcohols tested was simple non-competitive. The inhibition constants (KI) were in the range of 1.32-3.10 M, and the order of the inhibitory effect was 1-propanol>2-propanol>methanol>ethanol. The ΔG(≠) and ΔG(≠)E-T values of the enzyme increased at increasing concentrations of all alcohols examined, but the ΔG(≠)ES value of the enzyme remained almost the same. The constant Km and ΔG(≠)ES values in the presence and absence of mono alcohols indicated the existence of different binding sites for mono alcohols and casein on enzyme the molecule. The kcat of the enzyme decreased linearly by increasing log P and decreasing dielectric constant (D) values, but the ΔG(≠) and ΔG(≠)E-T values of the enzyme increased by increasing log P and decreasing D values of the reaction medium containing mono alcohols.

  14. On the positron-trapping states of metal mono-vacancies

    International Nuclear Information System (INIS)

    Sankar, S.; Iyakutti, K.

    1987-07-01

    A model calculation based on the static dielectric screening theory has been performed to estimate the probable number of positron-trapping levels in metal mono-vacancies and it is shown that there cannot be more than one. (author). 8 refs, 1 tab

  15. Maillard reaction products of rice protein hydrolysates with mono-, oligo- and polysaccharides

    Science.gov (United States)

    Rice protein, a byproduct of rice syrup production, is abundant but, its lack of functionality prevents its wide use as a food ingredient. Maillard reaction products of (MRPs) hydrolysates from the limited hydrolysis of rice protein (LHRP) and various mono-, oligo- and polysaccharides were evaluat...

  16. Mitochondrial membranes with mono- and divalent salt: Changes induced by salt ions on structure and dynamics

    NARCIS (Netherlands)

    Pöyry, S.; Róg, T.; Karttunen, M.E.J.; Vattulainen, I.

    2009-01-01

    We employ atomistic simulations to consider how mono- (NaCl) and divalent (CaCl2) salt affects properties of inner and outer membranes of mitochondria. We find that the influence of salt on structural properties is rather minute, only weakly affecting lipid packing, conformational ordering, and

  17. Finite Element Analysis Of Structural And Magmatic Interactions At Mono Basin (California)

    Science.gov (United States)

    La Marra, D.; Manconi, A.; Battaglia, M.

    2010-12-01

    Mono Basin is a northward trending graben situated east of the Sierra Nevada and west of Cowtrack Mountains, extending from the northern edge of Long Valley Caldera towards the Bodie Hills. From a hydrographic perspective, the Mono Basin is defined by all streams that drain into Mono Lake. The Mono-Inyo Craters forms a prominent 25-km-long volcanic complex from the NW corner of Long Valley caldera to the southern edge of Mono Lake. The late Quaternary Hartley Springs fault occurs along the Sierran range front between June Lake and the northern border of Long Valley Caldera. Recently it has been proposed that the manifestation of the volcanic and of the tectonic activity in this area is likely interrelated. According to Bursik et al (2003), stratigraphic data suggest that during the North Mono-Inyo eruption sequence of ~1350 A.D., a series of strong earthquakes occurred across the end of the North Mono explosive phase and the beginning of the Inyo explosive phase. Moreover, geological and geomorphic features of the Hartley Springs fault are consistent with rupture of the fault during the eruption sequence. We use the Finite Element Method (FEM) to simulate a three-dimensional model and investigate the feedback mechanism between dike intrusion and slip along the Hartley Springs fault. We first validate our numerical model against the Okada (1985) analytical solution for a homogeneous and elastic flat half-space. Subsequently, we evaluate the distribution of local stress changes to study the influence of the Inyo Dike intrusion in ~1350 A.D. on Hartley Springs fault, and how the fault slip may encourage the propagation of dikes towards the surface. To this end, we considered the standard Coulomb stress change as failure criterion. Finally, we analyze the effects of the topography and of vertical and lateral heterogeneities of the crust on the distribution of local and regional stress changes. In this presentation, we highlight the preliminary results of our analysis

  18. High-resolution aeromagnetic survey of the Mono Basin-Long Valley Caldera region, California

    Science.gov (United States)

    Ponce, D. A.; Mangan, M.; McPhee, D.

    2013-12-01

    A new high-resolution aeromagnetic survey of the Mono Basin-Long Valley Caldera region greatly enhances previous magnetic interpretations that were based on older, low-resolution, and regional aeromagnetic data sets and provides new insights into volcano-tectonic processes. The surveyed area covers a 8,750 km2 NNW-trending swath situated between the Sierra Nevada to the west and the Basin and Range Province to the east. The surveyed area includes the volcanic centers of Mono Lake, Mono-Inyo Craters, Mammoth Mountain, Devils Postpile, and Long Valley Caldera. The NW-trending eastern Sierra frontal fault zone crosses through the study area, including the active Mono Lake, Silver Lake, Hartley Springs, Laurel Creek, and Hilton Creek faults. Over 6,000 line-kilometers of aeromagnetic data were collected at a constant terrain clearance of 150 m, a flight-line spacing of 400 m, and a tie-line spacing of 4 km. Data were collected via helicopter with an attached stinger housing a magnetic sensor using a Scintrex CS-3 cesium magnetometer. In the northern part of the survey area, data improve the magnetic resolution of the individual domes and coulees along Mono Craters and a circular shaped magnetic anomaly that coincides with a poorly defined ring fracture mapped by Kistler (1966). Here, aeromagnetic data combined with other geophysical data suggests that Mono Craters may have preferentially followed a pre-existing plutonic basement feature that may have controlled the sickle shape of the volcanic chain. In the northeastern part of the survey, aeromagnetic data reveal a linear magnetic anomaly that correlates with and extends a mapped fault. In the southern part of the survey, in the Sierra Nevada block just south of Long Valley Caldera, aeromagnetic anomalies correlate with NNW-trending Sierran frontal faults rather than to linear NNE-trends observed in recent seismicity over the last 30 years. These data provide an important framework for the further analysis of the

  19. Prevalence, Risk Factors, and Treatment Outcomes of Isoniazid- and Rifampicin-Mono-Resistant Pulmonary Tuberculosis in Lima, Peru.

    Directory of Open Access Journals (Sweden)

    Leonela Villegas

    Full Text Available Isoniazid and rifampicin are the two most efficacious first-line agents for tuberculosis (TB treatment. We assessed the prevalence of isoniazid and rifampicin mono-resistance, associated risk factors, and the association of mono-resistance on treatment outcomes.A prospective, observational cohort study enrolled adults with a first episode of smear-positive pulmonary TB from 34 health facilities in a northern district of Lima, Peru, from March 2010 through December 2011. Participants were interviewed and a sputum sample was cultured on Löwenstein-Jensen (LJ media. Drug susceptibility testing was performed using the proportion method. Medication regimens were documented for each patient. Our primary outcomes were treatment outcome at the end of treatment. The secondary outcome included recurrent episodes among cured patients within two years after completion of the treatment.Of 1292 patients enrolled, 1039 (80% were culture-positive. From this subpopulation, isoniazid mono-resistance was present in 85 (8% patients and rifampicin mono-resistance was present in 24 (2% patients. In the multivariate logistic regression model, isoniazid mono-resistance was associated with illicit drug use (adjusted odds ratio (aOR = 2.10; 95% confidence interval (CI: 1.1-4.1, and rifampicin mono-resistance was associated with HIV infection (aOR = 9.43; 95%CI: 1.9-47.8. Isoniazid mono-resistant patients had a higher risk of poor treatment outcomes including treatment failure (2/85, 2%, p-value<0.01 and death (4/85, 5%, p<0.02. Rifampicin mono-resistant patients had a higher risk of death (2/24, 8%, p<0.01.A high prevalence of isoniazid and rifampicin mono-resistance was found among TB patients in our low HIV burden setting which were similar to regions with high HIV burden. Patients with isoniazid and rifampicin mono-resistance had an increased risk of poor treatment outcomes.

  20. LA REPITENCIA ESCOLAR EN ESCUELAS PRIMARIAS DE SAN MIGUEL DE TUCUMÁN. UNA APROXIMACIÓN DESDE LAS REPRESENTACIONES SOCIALES Y LAS RELACIONES ENTRE DOCENTES Y ESTUDIANTES REPITENTES

    Directory of Open Access Journals (Sweden)

    María Micaela Villalonga Penna

    2011-01-01

    Full Text Available Este artículo presenta resultados de investigación sobre las representaciones sociales de docentes y estudiantes repitentes acerca de la repitencia, y sus implicaciones en las relaciones entre estos actores educativos. La metodología utilizada fue de tipo cualitativo. Se realizaron entrevistas en profundidad a docentes y a estudiantes repitentes de primer grado, y observaciones participantes en escuelas de San Miguel de Tucumán. El análisis de los datos se efectuó acorde a la teoría fundamentada. Se identificaron categorías y temas en las entrevistas y observaciones participantes, y se triangularon los datos para elaborar una teoría explicativa del fenómeno. Los resultados mostraron que las representaciones docentes inciden en la conformación de las representaciones de los niños repitentes y en las relaciones áulicas. Las docentes, que definieron a la educación de manera unicausal, se manifestaron favorables a la repitencia. Los estudiantes repitentes se representaron negativamente a la repitencia y a los vínculos con docentes y pares. Las interacciones áulicas evidenciaron comunicaciones unidireccionales y una aplicación desigual de normas. Esto permitía a las docentes mantener una autoimagen satisfactoria, pero influía negativamente en la de los niños repitentes. Las docentes que consideraron a la educación como un proceso complejo, definieron a la repitencia como una situación desfavorable. Las representaciones de los alumnos repitentes sobre la repitencia y las relaciones con docentes y pares aunaron aspectos negativos y positivos. Las relaciones áulicas evidenciaron comunicaciones uni y multi-direccionales y una aplicación de normas más equitativa. La autoimagen de las docentes y de los niños repitentes contenía aspectos positivos y negativos.

  1. DISEÑO DE UN INSTRUMENTO PARA IDENTIFICAR LAS REPRESENTACIONES SOCIALES SOBRE EL CONCEPTO AMBIENTE PRESENTES EN ESTUDIANTES DE LICENCIATURA EN BIOLOGÍA DE LA UNIVERSIDAD DISTRITAL FRANCISCO JOSÉ DE CALDAS

    Directory of Open Access Journals (Sweden)

    Karoll Yohanna Piza Amado

    2014-05-01

    Full Text Available En la actualidad las investigaciones en el campo de las representaciones sociales, en el contexto educativo, aportan una gran cantidad de elementos que posibilitan la comprensión del quehacer docente y por ende contribuyen al  el desarrollo de los maestros. La presente ponencia se deriva del proyecto de investigación titulado “Representaciones sociales sobre el concepto ambiente presentes en estudiantes de licenciatura en biología de la Universidad Distrital Francisco José De Caldas”, cuyo principal objetivo es reconocer las representaciones sociales del concepto “ambiente” que circulan en los estudiantes de Licenciatura en Biología de la Universidad Distrital Francisco José de Caldas. El articulo describe el proceso realizado para el diseño de un instrumento de investigación, enmarcado en técnicas cualitativas de recolección de datos,  cuyo objetivo es permitir la identificación de las representaciones sociales sobre el concepto ambiente presentes en estudiantes en formación docente en el área de  biología. El diseño del  cuestionario se orientó bajo técnicas como la libre asociación de palabras, los soportes gráficos y la verbalización de dibujos e hizo especial énfasis en rastrear dos de las dimensiones presentes en la representación social: la dimensión de información y la dimensión de actitud. Como resultado se obtuvo un instrumento que retomó y adaptó preguntas de trabajos anteriores realizados en el mismo campo de investigación y aporta una pregunta que permite evidenciar la dimensión de actitud a través de una situación problema.

  2. Diseñar un modelo administrativo de responsabilidad ambiental y control de riesgos para la compañía Lisar Representaciones ubicada en el sector de Solanda.

    OpenAIRE

    Fonseca Almeida, María Stefanía; Haro Narváez, Gabriela Carolina

    2015-01-01

    s thesis project is focused on Business Social Responsibility. It is a way of manage the companies to work in a sustainable way, taking into account the economic, social and environmental side. The thesis’ aim is to design an administrative model of Environmental Responsibility and Risks Control for the company Lisar Representaciones, located in the south of Quito in Solanda. With the usage of research techniques like: interviews and surveys performed to the citizens and employees, check list...

  3. Dust Generation Resulting from Desiccation of Playa Systems: Studies on Mono and Owens Lakes, California

    Science.gov (United States)

    Gill, Thomas Edward

    1995-01-01

    Playas, evaporites, and aeolian sediments frequently are linked components within the Earth system. Anthropogenic water diversions from terminal lakes form playas that release fugitive dust. These actions, documented worldwide, simulate aeolian processes activated during palaeoclimatic pluvial/interpluvial transitions, and have significant environmental impacts. Pluvial lakes Russell and Owens in North America's Great Basin preceded historic Mono and Owens Lakes, now desiccated by water diversions into dust-generating, evaporite -encrusted playas. Geochemical and hydrologic cycles acting on the Owens (Dry) Lake playa form three distinct crust types each year. Although initial dust production results from deflation of surface efflorescences after the playa dries, most aerosols are created by saltation abrasion of salt/silt/clay crusts at crust/ sand sheet contacts. The warm-season, clastic "cemented" crust is slowest to degrade into dust. If the playa surface is stabilized by an unbroken, non-efflorescent crust, dust formation is discouraged. When Mono Lake's surFace elevation does not exceed 1951 meters (6400 feet), similar processes will also generate dust from its saline lower playa. Six factors--related to wind, topography, groundwater, and sediments--control dust formation at both playas. These factors were combined into a statistical model relating suspended dust concentrations to playa/lake morphometry. The model shows the extent and severity of Mono Lake dust storms expands significantly below the surface level 6376 feet (1943.5 meters). X-ray diffraction analysis of Mono Basin soils, playa sediments, and aerosols demonstrates geochemical cycling of materials through land, air and water during Mono Lake's 1982 low stand. Soils and clastic playa sediments contain silicate minerals and tephra. Saline groundwater deposited calcite, halite, thenardite, gaylussite, burkeite and glauberite onto the lower playa. Aerosols contained silicate minerals (especially

  4. Representaciones de los docentes de inglés sobre el proceso de formación integral: ¿qué descripción ofrecen de ella?

    Directory of Open Access Journals (Sweden)

    Ana Elsy Díaz Monsalve

    2010-04-01

    Full Text Available Objetivo: indagar las representaciones que sobre el ideal de formación integral tienen los docentes de lenguas extranjeras (inglés en la educación básica de instituciones públicas de la ciudad de Medellín. Método: se realizó una investigación cualitativa con diecinueve docentes, licenciados o especialistas en inglés; estos respondieron una encuesta, y algunos de ellos participaron en una entrevista en profundidad. Resultados: las representaciones de los docentes de inglés poseen dos énfasis, uno instrumental y otro trascendental; además, estas representaciones están estructura-das temáticamente alrededor de la personalidad del estudiante, su competencia comunicativa y su contexto social y cultural. Conclusiones: esta investigación permitió a las autoras construir conocimientos nuevos sobre el contenido de la formación integral desde los mismos docentes de inglés, como producto de sus experiencias logradas en el proceso de la enseñanza de este idioma.

  5. 1. Mono([8]annulene)Uranium(4) half-sandwich complexes, 2. Novel syntheses of symmetrically substituted cyclooctatetetraenes

    International Nuclear Information System (INIS)

    Boussie, T.R.

    1991-10-01

    A reproducible, high-yield synthesis of mono([8]annulene)uranium(4)dichloride (1) is reported, along with the X-ray crystal structural of the bis(pyridine) adduct. Metathesis reactions of the half-sandwich complex 1 with a variety of simple alkyl and alkoxy reagents failed to generate any isolable mono-ring complexes. Reactions of 1 with polydentate, delocalized anions did produce stable derivatives, including mono([8]annulene)uranium(4)bis(acetylacetonate) (4). An X-ray crystal structure of 4 is reported

  6. 1. Mono([8]annulene)Uranium(4) half-sandwich complexes, 2. Novel syntheses of symmetrically substituted cyclooctatetetraenes

    Energy Technology Data Exchange (ETDEWEB)

    Boussie, Thomas Richard [Univ. of California, Berkeley, CA (United States)

    1991-10-01

    A reproducible, high-yield synthesis of mono([8]annulene)uranium(4)dichloride (1) is reported, along with the X-ray crystal structural of the bis(pyridine) adduct. Metathesis reactions of the half-sandwich complex 1 with a variety of simple alkyl and alkoxy reagents failed to generate any isolable mono-ring complexes. Reactions of 1 with polydentate, delocalized anions did produce stable derivatives, including mono([8]annulene)uranium(4)bis(acetylacetonate) (4). An X-ray crystal structure of 4 is reported.

  7. 1. Mono((8)annulene)Uranium(4) half-sandwich complexes, 2. Novel syntheses of symmetrically substituted cyclooctatetetraenes

    Energy Technology Data Exchange (ETDEWEB)

    Boussie, T.R.

    1991-10-01

    A reproducible, high-yield synthesis of mono((8)annulene)uranium(4)dichloride (1) is reported, along with the X-ray crystal structural of the bis(pyridine) adduct. Metathesis reactions of the half-sandwich complex 1 with a variety of simple alkyl and alkoxy reagents failed to generate any isolable mono-ring complexes. Reactions of 1 with polydentate, delocalized anions did produce stable derivatives, including mono((8)annulene)uranium(4)bis(acetylacetonate) (4). An X-ray crystal structure of 4 is reported.

  8. Representaciones sociales del proceso salud-enfermedad bucal en madres gestantes de una población urbana: Medellín, Colombia Social representations of pregnant mothers in an urban community: Medellín, Colombia

    Directory of Open Access Journals (Sweden)

    Gloria Escobar-Paucar

    2010-02-01

    Full Text Available OBJETIVO: Comprender las representaciones sociales del proceso salud-enfermedad bucal en madres gestantes. MATERIAL Y MÉTODOS: Se realizó una investigación cualitativa. Fueron entrevistadas 28 mujeres adultas, en periodo de gestación, asistentes a un programa prenatal en la ciudad de Medellín, Colombia, durante los años 2006-2007. Las entrevistas, grabadas y transcritas, se analizaron mediante codificación abierta, axial y selectiva. RESULTADOS: Las madres se manifiestan dispuestas a dar a sus hijos una buena salud bucal; la consideran su responsabilidad-culpa, y para lograrlo, reclaman apoyo del personal de salud, apoyo que en ocasiones no copa sus expectativas y necesidades. CONCLUSIONES: Se requieren profesionales que integren, desde su formación, tanto la dimensión social como conocimientos técnico-científicos, que reconozcan la coexistencia de diferentes racionalidades en el encuentro educativo y relativicen sus conceptos propios, dando propuestas educativas que supongan rupturas paradigmáticas para lograr el apoyo requerido, respetando la autonomía de las madres, sin culpabilizarlas.OBJECTIVE: To understand social representations of oral health-disease among pregnant mothers. MATERIAL AND METHODS: A qualitative study was conducted for which 28 pregnant adult women were interviewed who attended a prenatal program at a health institution in the city of Medellín, Colombia between 2006 and 2007. Interviews were recorded and transcribed and analyses were performed using open, axial and selective coding. RESULTS: Mothers would like to provide their children good oral health and consider it their responsibility; associated guilt is also experienced. To fulfill this responsibility, mothers request support from health personnel, which at times does not meet their needs and expectations. CONCLUSIONS: Professionals are needed who, beginning with their education, integrate the social dimension with technical-scientific knowledge, who

  9. Fabrication and Application of Mono-sized Spherical Micro Particles by Pulsated Orifice Ejection Method

    Directory of Open Access Journals (Sweden)

    DONG Wei

    2018-02-01

    Full Text Available A novel technology called pulsated orifice ejection method(POEM and used for preparing mono-sized and high-precision spherical micro particles was introduced in this article. The working principle of the technique was illustrated and it was in two modes:low-melting point diaphragm mode and high-melting point rod mode, depending on the different melting points of materials. The particles prepared by POEM have the advantages of mono-sized, uniform and controllable particle size, high sphericity, and consistent thermal history. By introducing the application of particles prepared by this method, showing the huge application prospects of this technology in electronic packaging, bioengineering, micro-fabrication, rapid solidification analysis of metal droplets, additive manufacturing and so on.With the development of POEM, this technology is predicted to have wider prospects due to its unique characteristics.

  10. Rotavirus infection in children: mono-and combines forms, especially clinics and course

    Directory of Open Access Journals (Sweden)

    N. B. Denisyuk

    2012-01-01

    Full Text Available Analyzed 74 case histories of children under one year with rotavirus infection. The most commonly detected rotavirus gastroenteritis in the form of mono-and combined forms. Mono-infection in 78.3% of cases occurred in the moderate form with a leading syndrome in the form of gastroenteritis, severe dehydration proceeded with symptoms of varying severity. Mixed variants in 98.7% of cases are in the unfavorable premorbid background, in 42.8% of children were registered in the severe forms, and children younger than 6 months were erased within. The diagnosis of intestinal infection was confirmed by PCR, bacteriological and immunological methods.

  11. Photo-modulation of the spin Hall conductivity of mono-layer transition metal dichalcogenides

    Energy Technology Data Exchange (ETDEWEB)

    Sengupta, Parijat; Bellotti, Enrico [Department of Electrical and Computer Engineering, Boston University, Boston, MA 02215 (United States)

    2016-05-23

    We report on a possible optical tuning of the spin Hall conductivity in mono-layer transition metal dichalcogenides. Light beams of frequencies much higher than the energy scale of the system (the off-resonant condition) do not excite electrons but rearrange the band structure. The rearrangement is quantitatively established using the Floquet formalism. For such a system of mono-layer transition metal dichalcogenides, the spin Hall conductivity (calculated with the Kubo expression in presence of disorder) exhibits a drop at higher frequencies and lower intensities. Finally, we compare the spin Hall conductivity of the higher spin-orbit coupled WSe{sub 2} to MoS{sub 2}; the spin Hall conductivity of WSe{sub 2} was found to be larger.

  12. Geochemistry of ikaite formation at Mono Lake, California: Implications for the origin of tufa mounds

    Science.gov (United States)

    Council, Todd C.; Bennett, Philip C.

    1993-11-01

    The mineral ikaite (CaCO3 ṡ 6H2O), not previously observed in lake environments, precipitates seasonally along the shore of Mono Lake, California, where Ca-HCO3 spring water mixes with cold Na-CO3 lake water. During the winter, cold water temperatures and high concentrations of PO43- and organic carbon inhibit calcite precipitation, allowing the metastable ikaite to form. During the spring warming, however, ikaite decomposes to form calcium carbonate and water, occasionally leaving pseudomorphs of the primary precipitate. The identification of modern ikaite suggests that both Pleistocene and Holocene tufas in the Mono basin originally precipitated as ikaite. This mineral may also form in other lake environments, but rapid recrystallization after warming destroys the physical, chemical, and isotopic evidence of formation, and alters the geochemical record.

  13. Radiocarbon constraints on fossil thinolite tufa formation in the Mono Basin, CA, USA

    Science.gov (United States)

    Leroy, S. L.; Zimmerman, S. R.; Hemming, S. R.; Stine, S.; Guilderson, T. P.

    2009-12-01

    Mono Lake is a terminal lake located at the western edge of the Great Basin, and is famous for its tufa towers. Thinolite, which is thought to be a CaCO3 pseudomorph of ikaite, is found around the Mono Basin in many fossil tufa towers, particularly at elevations above 2000 meters. The subaqueous parent mineral ikaite forms at low temperatures (34 kyr) to as young as 15.5 14C kyr BP. In general there is a consistent stratigraphic trend of ages within the mound, but the thinolite ages are anomalously young and one thinolite sample shows a large age reversal. The best estimate of the age of the precipitation of this tufa mound is given by the non-thinolite textures. More work is needed to determine the best sampling and sample preparation strategies in order to get a reliable age model for this mound.

  14. CUANDO LA ESCUELA SE TRANSFORMA EN UN INFIERNO: ESTUDIO SOBRE LAS REPRESENTACIONES SOCIALES DE LA VIOLENCIA ESCOLAR EN UNA ESCUELA SECUNDARIA DE LA CIUDAD DE MEXICO

    Directory of Open Access Journals (Sweden)

    Iván Baggini Arri

    2012-12-01

    Full Text Available La violencia en la escuela se ha constituido a los largo de los últimos años en México en un tema prioritario en las investigaciones sociales como asimismo en un tópico destacado en la agenda pública gubernamental debido al incremento de la inseguridad en el interior de los establecimientos educativos y en su entorno, al grado de crueldad que denotan las acciones violentas y sus consecuencias, originando una multiplicidad de estudios que amparados en marcos teóricos y disciplinarios diversos han permitido un análisis del tema desde la perspectiva educativa, social, política, psicológica y de la salud. No obstante, la limitada literatura disponible que escrute este problema social desde la mirada de las representaciones sociales hace que el presente escrito muestre el análisis de las narrativas que los actores de una escuela secundaria periférica de la ciudad de México tienen sobre la violencia escolar con la pretensión de conocer el contenido de las representaciones sociales. Para alcanzar este objetivo se tuvo en cuenta un diseño cualitativo en donde se destaca la utilización de la entrevista, la observación y la revisión documental como las técnicas que permiten la creación de los datos a partir de los testimonios ofrecidos por los actores escolares de una escuela secundaria técnica y la teoría fundamentada como el recurso para la reconstrucción analítica del contenido de las narrativas. La importancia de estudiar este tema radica en la necesidad de hacer visible los significados sociales que el sentido común le atribuye a este fenómeno para entender las prácticas agresivas que se suscitan en el interior de la escuela además de brindar insumos que ayuden a una revisión de las políticas públicas que se implementan actualmente para la creación de ambientes escolar basados en el desarrollo de una cultura de la paz. En este sentido, consideramos que el significado de la violencia escolar es construido por los

  15. Designing real-time systems based on mono-master Profibus-DP networks

    OpenAIRE

    Monforte, Salvatore; Alves, Mário; Vasques, Francisco; Tovar, Eduardo

    2000-01-01

    Profibus networks are widely used as the communication infrastructure for supporting distributed computer-controlled applications. Most of the times, these applications impose strict real-time requirements. Profibus-DP has gradually become the preferred Profibus application profile. It is usually implemented as a mono-master Profibus network, and is optimised for speed and efficiency. The aim of this paper is to analyse the real-time behaviour of this class of Profibus networks...

  16. Heavy metals behaviour during mono-combustion and co-combustion of sewage sludge

    Energy Technology Data Exchange (ETDEWEB)

    Lopes, M. Helena; Abelha, Pedro; Olieveira, J.F. Santos; Gulyurtlu, Ibrahim; Cabrita, Isabel [INETI-DEECA, Lisboa (Portugal)

    2005-03-01

    This paper presents the study of the combustion of granular dry sewage sludge performed on a pilot fluidized bed system. The results of mono-combustion of sludge and co-combustion with coal were compared with those of coal combustion for ash partitioning, the formation of gaseous pollutants and heavy metals behaviour. It was found that the mineral matter of sludge was essentially retained as bottom ashes. The production of fines ashes was small during the mono-combustion due to the tendency of coal to produce fine ashes which also contained unburned char. The degree of heavy metal volatilization was found to be slightly higher during co-combustion than in mono-combustion; however, most of them were retained in ashes and their emissions were found to be below the regulated levels. Hg was completely volatilized; however, during combustion trials involving coal it was captured by cyclone ashes at temperatures below 300 deg C. During sludge mono-combustion the retention of Hg in cyclone ashes containing low LOI was not enough to decrease emissions below the regulated levels; hence, it is necessary to install dedicated flue gas treatment for Hg removal. The leachability and ecotoxicity of sludge and ashes was compared with the new regulatory limits for landfill disposal in the EU. It was found that the release of organic matter and heavy metals found in the sludge was low from granular bed ashes; hence, except for sulphate release, bed ashes were converted into inert and non-ecotoxic materials. Ashes from test with limestone and cyclone ashes seemed to be more problematic because of pH effects and contamination with steel corrosion products. The recovery and reutilization of sludge bed ashes could, therefore, be possible, as long as the release of sulphate do not interfere with the process.

  17. Mono-implicit Runge Kutta schemes for singularly perturbed delay differential equations

    Science.gov (United States)

    Rihan, Fathalla A.; Al-Salti, Nasser S.

    2017-09-01

    In this paper, we adapt Mono-Implicit Runge-Kutta schemes for numerical approximations of singularly perturbed delay differential equations. The schemes are developed to reduce the computational cost of the fully implicit method which combine the accuracy of implicit method and efficient implementation. Numerical stability properties of the schemes are investigated. Numerical simulations are provided to show the effectiveness of the method for both stiff and non-stiff initial value problems.

  18. Constraining Dark Matter using Mono-X, Dijet, and Dilepton Final States with the ATLAS Detector

    CERN Document Server

    Tolley, Emma; The ATLAS collaboration

    2017-01-01

    Weakly-coupled TeV-scale particles may mediate interactions between dark matter (DM) and Standard Model (SM) particles. DM production at colliders may be evident in “mono-X” topologies, and mediator production in in dijet and dilepton events. The latest results obtained by the ATLAS experiment are presented and interpreted following the LHC DM WG guidelines, with particular focus on the complementarity between different collider searches as well as direct detection experiments.

  19. [Improvement of symptoms in mild hyperthyroidism with an extract of Lycopus europaeus (Thyreogutt® mono)].

    Science.gov (United States)

    Eiling, Rudolf; Wieland, Veronika; Niestroj, Michael

    2013-02-01

    Extracts of Lycopus europaeus are used clinically for the control of vegetative and irritative symptoms in mild hyperthyroidism. This study assessed the effects and safety of an extract of Lycopus europaeus (Thyreogutt® mono tablets or drops) in a general practice setting. The study was conducted as an open post-marketing surveillance study consisting of three cohorts, i.e. a prolective assessment in patients receiving Thyreogutt® mono for 4 weeks, a retrolective documentation of data from patients who had received at least one course (4 weeks) of Thyreogutt® mono therapy during the previous 2 years, and a control cohort receiving no drug treatment. Assessments comprised symptoms of mild hyperthyroidism, laboratory tests of thyroid function and adverse events surveillance. Response was defined as normal thyroid hormone values at the end of therapy or a reduction of at least 20% in the number of symptoms after treatment. Responder rates were calculated. Four hundred and three patients with mild symptomatic hyperthyroidism were observed. The prolective assessment included 146 patients, the retrolective assessment 171 patients, and the control cohort 86 untreated patients. The responder rate was 72.6% in the prolective assessment and 96.5% in the retrolective assessment whereas the responder rate in the untreated control cohort amounted to 41.2%. No adverse events were reported. The extract of Lycopus europaeus was well tolerated and associated with a statistically significant and clinically relevant improvement of the symptoms in mild hyperthyroidism. The improvement was markedly better in both Thyreogutt® mono cohorts than in the control cohort.

  20. Mono-Type TFT Logic Architectures for Low Power Systems on Panel Applications

    OpenAIRE

    Yang, Yifan; Lee, Sungsik; Holburn, David Michael; Nathan, Arokia

    2016-01-01

    This paper introduces novel 7-T pseudo-CMOS for enhancement mode and 6-T pseudo-CMOS for depletion mode inverter circuit architectures. The designs are built around mono-type of TFTs and consume less power consumption than existing 4-T pseudo-CMOS circuits. In addition, they provide steep transfer curves, along with embedded control for compensation of device parameter variations. Analysis of the transient behavior for the various circuit architectures is presented, providing quantitative ins...

  1. SIMAC - A phosphoproteomic strategy for the rapid separation of mono-phosphorylated from multiply phosphorylated peptides

    DEFF Research Database (Denmark)

    Thingholm, Tine E; Jensen, Ole N; Robinson, Phillip J

    2008-01-01

    spectrometric analysis, such as immobilized metal affinity chromatography or titanium dioxide the coverage of the phosphoproteome of a given sample is limited. Here we report a simple and rapid strategy - SIMAC - for sequential separation of mono-phosphorylated peptides and multiply phosphorylated peptides from...... and an optimized titanium dioxide chromatographic method. More than double the total number of identified phosphorylation sites was obtained with SIMAC, primarily from a three-fold increase in recovery of multiply phosphorylated peptides....

  2. Leptonic mono-top from single stop production at the LHC

    Energy Technology Data Exchange (ETDEWEB)

    Duan, Guang Hua [CAS Key Laboratory of Theoretical Physics, Institute of Theoretical Physics,Chinese Academy of Sciences,Beijing 100190 (China); Hikasa, Ken-ichi [Department of Physics, Tohoku University,Sendai 980-8578 (Japan); Wu, Lei [Department of Physics and Institute of Theoretical Physics, Nanjing Normal University,Nanjing, Jiangsu 210023 (China); ARC Centre of Excellence for Particle Physics at the Terascale,School of Physics, The University of Sydney,NSW 2006 (Australia); Yang, Jin Min [CAS Key Laboratory of Theoretical Physics, Institute of Theoretical Physics,Chinese Academy of Sciences,Beijing 100190 (China); Department of Physics, Tohoku University,Sendai 980-8578 (Japan); Zhang, Mengchao [Center for Theoretical Physics and Universe, Institute for Basic Science (IBS),Daejeon 34051 (Korea, Republic of)

    2017-03-16

    Top squark (stop) can be produced via QCD interaction but also the electroweak interaction at the LHC. In this paper, we investigate the observability of the associated production of stop and chargino, pp→t̃{sub 1}χ̃{sub 1}{sup −}, in compressed electroweakino scenarios at 14 TeV LHC. Due to small mass splitting between the lightest neutralino (χ̃{sub 1}{sup 0}) and chargino (χ̃{sub 1}{sup −}), the single stop production can give the mono-top signature through the stop decay t̃{sub 1}→tχ̃{sub 1}{sup 0}. We analyze the leptonic mono-top channel of the single stop production and propose a lab-frame observable cos θ{sub bℓ} to reduce the SM backgrounds. We find that such leptonic mono-top events from the single stop production can be probed at 2σ level at the HL-LHC if m{sub t̃{sub 1}}<760 GeV and m{sub χ̃{sub 1{sup 0}}}<150 GeV. Given a discovery of the stop and a measurement of the single stop production cross section, the stop mixing angle can also be determined from the single stop production at the HL-LHC.

  3. Intra-articular osteoid osteoma as a differential diagnosis of diffuse mono-articular joint pain.

    Science.gov (United States)

    Rolvien, Tim; Zustin, Jozef; Mussawy, Haider; Schmidt, Tobias; Pogoda, Pia; Ueblacker, Peter

    2016-11-04

    The aim of this retrospective study was to investigate the frequency of intra-articular osteoid osteoma (iaOO) in a large study cohort and to demonstrate its clinical relevance as an important differential diagnosis of non-specific mono-articular joint pain. We searched the registry for bone tumours of the University Medical Centre Hamburg-Eppendorf for osteoid osteomas in the last 42 years. Herein, we present three selected iaOO which were detected in the three major weight-bearing joints. Computed tomography (CT) or magnetic resonance imaging (MRI) scans were performed for initial diagnosis. Out of a total of 367 osteoid osteomas, 19 (5.2 %) tumours were localized intra-articularly. In all three presented tumours, a history of severe mono-articular pain was reported; however, the mean time to correct diagnosis was delayed to 20.7 months. Clearly, the nidus seen in CT and MRI images in combination with inconsistent salicylate-responsive nocturnal pain led to the diagnosis of iaOO. Rarely, osteoid osteoma can occur in an intra-articular location. In cases of diffuse mono-articular pain, iaOO should be considered both in large and smaller joints to avoid delays in diagnosis and therapy of this benign bone tumour.

  4. New thiol-responsive mono-cleavable block copolymer micelles labeled with single disulfides.

    Science.gov (United States)

    Sourkohi, Behnoush Khorsand; Schmidt, Rolf; Oh, Jung Kwon

    2011-10-18

    Thiol-responsive symmetric triblock copolymers having single disulfide linkages in the middle blocks (called mono-cleavable block copolymers, ss-ABP(2)) were synthesized by atom transfer radical polymerization in the presence of a disulfide-labeled difunctional Br-initiator. These brush-like triblock copolymers consist of a hydrophobic polyacrylate block having pendent oligo(propylene oxide) and a hydrophilic polymethacrylate block having pendent oligo(ethylene oxide). Gel permeation chromatography and (1)H NMR results confirmed the synthesis of well-defined mono-cleavable block copolymers and revealed that polymerizations were well controlled. Because of amphiphilic nature, these copolymers self-assembled to form colloidally stable micelles above critical micellar concentration of 0.032 mg · mL(-1). In response to reductive reactions, disulfides in thiol-responsive micelles were cleaved. Atomic force microscopy and dynamic light scattering analysis suggested that the cleavage of disulfides caused dissociation of micelles to smaller-sized assembled structures in water. Moreover, in a biomedical perspective, the mono-cleavable block copolymer micelles are not cytotoxic and thus biocompatible. Copyright © 2011 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

  5. Unique Intramolecular Electronic Communications in Mono-ferrocenylpyrimidine Derivatives: Correlation between Redox Properties and Structural Nature

    International Nuclear Information System (INIS)

    Xiang, Debo; Noel, Jerome; Shao, Huibo; Dupas, Georges; Merbouh, Nabyl; Yu, Hua-Zhong

    2015-01-01

    Highlights: • Unique intramolecular electronic communications (electron withdrawing and π-bond delocalization effects) exist in the mono-ferrocenylpyrimidine derivatives. • The redox potential shift correlates the pyrimidine ring torsion angle with the extent of electron delocalization. • The correlation between redox properties and structural nature in mono-ferrocenylpyrimidine derivatives is evident. - Abstract: The correlation between redox properties and structural nature in a complete set of mono-ferrocenylpyrimidine derivatives (2-ferrocenylpyrimidine, 2-FcPy; 4-ferrocenylpyrimidine, 4-FcPy; 5-ferrocenylpyrimidine, 5-FcPy) was evaluated by investigating the intramolecular electronic communications. Both conventional electrochemical measurements in organic solvents and thin-film voltammetric studies of these compounds were carried out. It was discovered that their formal potentials are significantly different from each other, and shift negatively in the order of 4-FcPy > 5-FcPy > 2-FcPy. This result suggests that the intramolecular electronic communication is dictated by the delocalization effect of the π-bonding systems in 2-FcPy, and that the electron-withdrawing effect of the nitrogen atoms in the pyrimidine ring plays the key role in 4-FcPy and 5-FcPy. The single crystal X-ray structure analyis and Density Functional Theory (DFT) calculation provided additional evidence (e.g., different torsion angles between the cyclopentadienyl and pyrimidine rings) to support the observed correlation between the redox properties and structural nature

  6. Anaerobic mono-digestion of lucerne, grass and forbs – Influence of species and cutting frequency

    DEFF Research Database (Denmark)

    Wahid, Radziah; Feng, Lu; Cong, Wenfeng

    2018-01-01

    but it was not possible to ascertain whether this was due to organic overload alone or if high ammonia levels during Lu-4 digestion were contributing to the reduced performance. It was found that four cuts per year was suitable for a lab-scale mono-digestion system as the substrate was less fibrous and has lower dry......In the present study, biogas potentials of multispecies swards including grass, lucerne, caraway, ribwort plantain and chicory from two- and four-cut regimes (Mix-2 and Mix-4) for mono-digestion applying batch and continuous modes under lab-scale conditions were investigated. The gas yields...... confirmed with continuous experiments, during which the reactor digesting Mix-4 was stable throughout the experiment with low ammonia and volatile fatty acid (VFA) concentration. Meanwhile, mono-digestion of Lu-4 led to elevated VFA levels, even at a comparatively low organic loading rate of 1.76 g L−1 d−1...

  7. Assessment of genetic diversity and variation of acer mono max seedlings after spaceflight

    International Nuclear Information System (INIS)

    Long, C.; Li, Y.; Zhang, Y.; Yang, M.

    2015-01-01

    Genetic diversity and variation of Acer Mono Maxim seedlings sampled from space-mutated (sm) populations were compared to seedlings from parallel control (ck) ones using molecular markers. RAMP analysis showed that the percentage of polymorphic band, Shannon diversity index and Nei gene diversity index of the space-mutated populations were higher than those of the control ones, which indicated that genetic variation increased after spaceflight in populations of Acer Mono Maxim. By using un-weighted pair group method with arithmetic mean (UPGMA) method, three space-mutated repeats (populations) were clustered together, and control groups clustered separately, which further indicated that there was difference between the space-mutated ones and the control ones, which may be caused by space mutation. Further analysis of genomic inconsistency between the root and leaf samples from the same tree showed that a total variation rate of 6.3% and 1.7% were obtained in ten space-mutated individuals by using RAMP and SSR markers, respectively, however, the variation rate was zero in control ones. It provided that space mutation may be caused the individual variation of Acer Mono Maxim. (author)

  8. Simulation of gas hydrogen diffusion through partially water saturated mono-modal materials

    International Nuclear Information System (INIS)

    Boher, C.; Lorente, S.; Frizon, F.; Bart, F.

    2012-01-01

    Concerning the disposal of nuclear wastes, it is important to design concrete envelopes with pore networks that allow the diffusion of hydrogen towards the outside. This work documents the relationship between geo-polymers, which are materials with a quasi mono-modal pore network, and their gaseous diffusivity capacities. Using a mono-modal material allows studying a specific pore size contribution to gaseous diffusion. The pore network is characterized by mercury porosimetry. These experimental results are used as data in a model named MOHYCAN. The modeling work consists of creating a virtual pore network. Then, water layers are deposited in this network to simulate variable water saturation levels. Finally hydrogen is transported through the virtual network using a combination of ordinary diffusion and Knudsen diffusion. MOHYCAN calculates the hydrogen diffusion coefficient for water saturation degree from 0% to 100%. The impacts of the pore network arrangement or the pore network discretization have been studied. The results are, for a quasi mono-modal material: -) the diffusion coefficient is not sensitive to different virtual pore network arrangement; -) the diffusion coefficient values have a sharp drop at specific water saturation (this is due to the water saturation of the main and unique pore family); -) a 2 pores family based model is sufficient to represent the pore network. Theses observations will not be valid if we consider a material with a large pore size distribution, like cementitious materials

  9. Viajando sobre hojas volanderas: representaciones del viaje en pliegos sueltos del siglo XVIII = Travelling on broadsides: representations of travels in 18th-century Spanish chapbooks

    Directory of Open Access Journals (Sweden)

    Juan Gomis Coloma

    2016-12-01

    Full Text Available ResumenEl tema que aborda este trabajo son las representaciones del viaje y de los viajeros en los romances del siglo XVIII. Los objetivos son, en primer lugar, dar a conocer una fuente “popular” en relación a un tema, el viaje, que para el siglo XVIII ha sido generalmente estudiado desde la perspectiva de la alta cultura, como ingrediente clave para la formación e instrucción de cualquier espíritu ilustrado. Rastreando los aspectos asociados al viaje que, numerosos, asoman en los pliegos sueltos, se muestran otras representaciones de viajes y viajeros, que contribuyan a enriquecer nuestra comprensión sobre la diversidad de concepciones que el tema pudo suscitar en la época. En segundo lugar, a partir de una muestra representativa de romances publicados en el siglo XVIII, se analizan distintos rasgos de los relatos de viajes: periplos, lugares de destino, tipos de viajes, identidad de los viajeros, causas para emprender el itinerario, descripción de espacios, éxito o fracaso de la empresa, etc. Finalmente, se seleccionan algunos textos representativos para indagar los valores asociados al viaje y al encuentro con “el otro”, con el fin de explorar los miedos e ilusiones que, según los relatos, llevaba aparejado aventurarse hacia lo desconocido.AbstractThis paper focuses on 18th century romances’ representations of travels and travellers. Its aims are: firstly, to shed light on a «popular» source about a topic like travels, which has been studied traditionally from the perspective of high culture, as an element linked to the education of enlightened people. Through the analysis of different features about travels which are found in «pliegos sueltos», another representations of travels and travellers are shown, which can enrich our understanding about this topic. Secondly, different features of travelling stories published as popular prints in the 18th century are analysed: journeys, destinations, travellers and their aims

  10. Estudio de las representaciones sociales de la hipertensión arterial según género (Social Representations Study of Arterial Hypertension According to Gender

    Directory of Open Access Journals (Sweden)

    Silvia Deborah Ofman

    2015-06-01

    Full Text Available Resumen: El objetivo del presente estudio es identificar, de acuerdo al género, la estructura de las representaciones sociales de la hipertensión arterial que presentan los/as pacientes hipertensos/as. El diseño es descriptivo comparativo, de corte transversal, utilizando metodología cuantitativa y cualitativa. La muestra estuvo integrada por 200 pacientes hipertensos/ as adultos/as (100 varones y 100 mujeres, reclutados/as de distintos centros de salud de la Ciudad Autónoma de Buenos Aires (Argentina. Los instrumentos utilizados fueron el Cuestionario sociodemográfico y clínico, la Asociación de palabras de Abric y el Cuestionario sobre creencias de la hipertensión arterial, elaborado ad hoc. Los resultados denotan cierta reproducción de los estereotipos de género en el anclaje de las representaciones sociales. Los varones se refieren más a los aspectos biomédicos y las mujeres a los factores emocionales. El énfasis en una de las causas de esta problemática conllevaría el riesgo de que cada grupo no se sienta vulnerable frente a otros factores que también influyen en el enfermar. Abstract: The objective of this study is to identify, according to gender, the structure of social representations of arterial hypertension presented by hypertensive patients. The design is descriptive-comparative, cross-sectional, using quantitative and qualitative methodologies. The sample consisted of 200 hypertensive patients/adults (100 men and 100 women, recruited from different health centers in Autonomous City of Buenos Aires (Argentina. The instruments used were the Socio-demographic and clinical questionnaire, the Word Associations by Abric, and the Questionnaire about beliefs in arterial hypertension, developed ad hoc. The results show certain playback of gender stereotypes in the anchor of social representations. The men relate more to the biomedical aspects and women to the emotional factors. The emphasis in one of the causes of this

  11. Representaciones y creencias en torno a la evaluación lingüística del adulto mayor con trastorno cognitivo leve

    Directory of Open Access Journals (Sweden)

    Beatriz Vallés

    2011-06-01

    Full Text Available Debido a los cambios demográficos que experimenta la población mundial cada día es más frecuente que los equipos de atención en el área de la logopedia deban atender adultos mayores con trastorno cognitivo leve (TCL, es decir, personas que presentan problemas en su memoria y otras funciones mentales, sin que los mismos interfieran con el desarrollo de sus actividades cotidianas (Speling et. al., 2011. Esta situación obliga a desarrollar acciones desde una nueva perspectiva epistemológica, ontológica y metodológica, especialmente en países en vías de desarrollo donde las personas mayores de 65 años se pueden enfrentar al aislamiento y la falta de servicios de salud pública, producto de una serie de representaciones negativas en torno al envejecimiento que atentan sobre su calidad de vida y determinan que los programas de formación profesional del logopeda deban abordar temas relacionados con el envejecimiento como proceso complejo y multifactorial. El objetivo de este trabajo es analizar las representaciones sociales que deban ser consideradas a la hora de elaborar una propuesta de evaluación lingüística dirigida al adulto mayor con TCL desde una perspectiva discursiva que permita el estudio del componente pragmático. Se plantea como alternativa el uso del análisis de la conversación entre pacientes e interlocutores claves como herramienta diagnóstica y la incorporación a los programas de formación profesional en Logopedia de contenidos sobre Psiquiatría, Lingüística Clínica, Geriatría y Gerontología a fin de alcanzar una práctica ajustada a los complejos marcos sociales donde se desarrolla actualmente la práctica logopédica en países en desarrollo.

  12. Historia y memoria campesina: silencios y representaciones sobre la lucha por la tierra y la represión en Ongoy

    Directory of Open Access Journals (Sweden)

    Guido Chati

    2015-01-01

    Full Text Available Este artículo sostiene que hay espacios sociales en Perú donde se producen memorias alternativas sobre la violencia política que tuvo lugar entre 1980 y 2000. En Andahuaylas, Apurímac, las narrativas recurrentes hablan acerca de la servidumbre en la hacienda, de la movilización campesina por la restitución de sus tierras, la ocupación de tierras y sobre su violenta represión. Existe esta memoria victoriosa respecto de la ocupación de la tierra, al lado de una memoria de victimización respecto de la guerra interna. Sin embargo, esas representaciones han sido silenciadas a través de estudios oficiales sobre la memoria, que están tan de moda. En Ongoy, Andahuaylas, bajo la apariencia de un conflicto entre las comunidades y hacienda, se encuentran prácticas políticas campesinas en relación con el Estado. Los campesinos desarrollan redes con las instituciones del Estado, sindicatos, estudiantes, inmigrantes, partidos políticos y otros en busca de la restitución de sus tierras. Reúnen documentos que utilizan como apoyo de su memoria y de su precedencia en el territorio. Ellos muestran que la lucha por la tierra que relativamente termina en 1963 con la ocupación de la tierra, la masacre de los campesinos y la represión, tiene orígenes coloniales. Son historias y recuerdos que reconstruyen la lucha por la tierra como un acto heroico y se superponen con otras representaciones más recientes de la violencia política. Para analizar el proceso, reconstruyo lo ocurrido en Ongoy entre 1960 y 1969 en diálogo con los documentos que los campesinos reunieron y con los testimonios de los actores sobre la forma en que se da una lectura posterior a la violencia política.

  13. Microbial ecology of soda lakes: investigating sulfur and nitrogen cycling at Mono Lake, CA, USA

    Science.gov (United States)

    Fairbanks, D.; Phillips, A. A.; Wells, M.; Bao, R.; Fullerton, K. M.; Stamps, B. W.; Speth, D. R.; Johnson, H.; Sessions, A. L.

    2017-12-01

    Soda lakes represent unique ecosystems characterized by extremes of pH, salinity and distinct geochemical cycling. Despite these extreme conditions, soda lakes are important repositories of biological adaptation and have a highly functional microbial system. We investigated the biogeochemical cycling of sulfur and nitrogen compounds in Mono Lake, California, located east of the Sierra Nevada mountains. Mono lake is characterized by hyperalkaline, hypersaline and high sulfate concentrations and can enter prolonged periods of meromixis due to freshwater inflow. Typically, the microbial sulfur cycle is highly active in soda lakes with both oxidation and reduction of sulfur compounds. However, the biological sulfur cycle is connected to many other main elemental cycles such as carbon, nitrogen and metals. Here we investigated the interaction between sulfur and nitrogen cycling in Mono lake using a combination of molecular, isotopic, and geochemical observations to explore the links between microbial phylogenetic composition and functionality. Metagenomic and 16S rRNA gene amplicon sequencing were determined at two locations and five depths in May 2017. 16S rRNA gene amplicon sequencing analysis revealed organisms capable of both sulfur and nitrogen cycling. The relative abundance and distribution of functional genes (dsrA, soxAB, nifH, etc) were also determined. These genetic markers indicate the potential in situ relevance of specific carbon, nitrogen, and sulfur pathways in the water column prior to the transition to meromictic stratification. However, genes for sulfide oxidation, denitrification, and ammonification were present. Genome binning guided by the most abundant dsrA sequences, GC content, and abundance with depth identified a Thioalkalivibrio paradoxus bin containing genes capable of sulfur oxidation, denitrification, and nitrate reduction. The presence of a large number of sulfur and nitrogen cycling genes associated with Thioalkalivibrio paradoxus

  14. Single-step brazing process for mono-block joints and mechanical testing

    International Nuclear Information System (INIS)

    Casalegno, V.; Ferraris, M.; Salvo, M.; Rizzo, S.; Merola, M.

    2007-01-01

    Full text of publication follows: Plasma facing components act as actively cooled thermal shields to sustain thermal and particle loads during normal and transient operations in ITER (International Thermonuclear Experimental Reactor). The plasma-facing layer is referred to as 'armour', which is made of either carbon fibre reinforced carbon composite (CFC) or tungsten (W). CFC is the reference design solution for the lower part of the vertical target of the ITER divertor. The armour is joined onto an actively cooled substrate, the heat sink, made of precipitation hardened copper alloy CuCrZr through a thin pure copper interlayer to decrease, by plastic deformation, the joint interface stresses; in fact, the CFC to Cu joint is affected by the CTE mismatch between the ceramic and metallic material. A new method of joining CFC to copper and CFC/Cu to CuCrZr alloy was effectively developed for the flat-type configuration; the feasibility of this process also for mono-block geometry and the development of a procedure for testing mono-block-type mock-ups is described in this work. The mono-block configuration consists of copper alloy pipe shielded by CFC blocks. It is worth noting that in mono-block configuration, the large thermal expansion mismatch between CFC and copper alloy is more significant than for flat-tile configuration, due to curved interfaces. The joining technique foresees a single-step brazing process: the brazing of the three materials (CFC-Cu-CuCrZr) can be performed in a single heat treatment using the same Cu/Ge based braze. The composite surface was modified by solid state reaction with chromium with the purpose of increasing the wettability of CFC by the brazing alloy. The CFC substrate reacts with Cr which, forming a carbide layer, allows a large reduction of the contact angle; then, the brazing of CFC to pure copper and pure copper to CuCrZr by the same treatment is feasible. This process allows to obtain good joints using a non-active brazing

  15. Single-step brazing process for mono-block joints and mechanical testing

    Energy Technology Data Exchange (ETDEWEB)

    Casalegno, V.; Ferraris, M.; Salvo, M.; Rizzo, S. [Politecnico di Torino, Materials Science and Chemical Engineering Dept., Torino (Italy); Merola, M. [ITER International Team, llER Joint Work Site, Cadarache, 13 - St Paul Lez Durance (France)

    2007-07-01

    Full text of publication follows: Plasma facing components act as actively cooled thermal shields to sustain thermal and particle loads during normal and transient operations in ITER (International Thermonuclear Experimental Reactor). The plasma-facing layer is referred to as 'armour', which is made of either carbon fibre reinforced carbon composite (CFC) or tungsten (W). CFC is the reference design solution for the lower part of the vertical target of the ITER divertor. The armour is joined onto an actively cooled substrate, the heat sink, made of precipitation hardened copper alloy CuCrZr through a thin pure copper interlayer to decrease, by plastic deformation, the joint interface stresses; in fact, the CFC to Cu joint is affected by the CTE mismatch between the ceramic and metallic material. A new method of joining CFC to copper and CFC/Cu to CuCrZr alloy was effectively developed for the flat-type configuration; the feasibility of this process also for mono-block geometry and the development of a procedure for testing mono-block-type mock-ups is described in this work. The mono-block configuration consists of copper alloy pipe shielded by CFC blocks. It is worth noting that in mono-block configuration, the large thermal expansion mismatch between CFC and copper alloy is more significant than for flat-tile configuration, due to curved interfaces. The joining technique foresees a single-step brazing process: the brazing of the three materials (CFC-Cu-CuCrZr) can be performed in a single heat treatment using the same Cu/Ge based braze. The composite surface was modified by solid state reaction with chromium with the purpose of increasing the wettability of CFC by the brazing alloy. The CFC substrate reacts with Cr which, forming a carbide layer, allows a large reduction of the contact angle; then, the brazing of CFC to pure copper and pure copper to CuCrZr by the same treatment is feasible. This process allows to obtain good joints using a non

  16. Separation of type and grade in cervical tumours using non-mono-exponential models of diffusion-weighted MRI

    International Nuclear Information System (INIS)

    Winfield, Jessica M.; Collins, David J.; Morgan, Veronica A.; DeSouza, Nandita M.; Orton, Matthew R.; Ind, Thomas E.J.; Attygalle, Ayoma; Hazell, Steve

    2017-01-01

    Assessment of empirical diffusion-weighted MRI (DW-MRI) models in cervical tumours to investigate whether fitted parameters distinguish between types and grades of tumours. Forty-two patients (24 squamous cell carcinomas, 14 well/moderately differentiated, 10 poorly differentiated; 15 adenocarcinomas, 13 well/moderately differentiated, two poorly differentiated; three rare types) were imaged at 3 T using nine b-values (0 to 800 s mm -2 ). Mono-exponential, stretched exponential, kurtosis, statistical, and bi-exponential models were fitted. Model preference was assessed using Bayesian Information Criterion analysis. Differences in fitted parameters between tumour types/grades and correlation between fitted parameters were assessed using two-way analysis of variance and Pearson's linear correlation coefficient, respectively. Non-mono-exponential models were preferred by 83 % of tumours with bi-exponential and stretched exponential models preferred by the largest numbers of tumours. Apparent diffusion coefficient (ADC) and diffusion coefficients from non-mono-exponential models were significantly lower in poorly differentiated tumours than well/moderately differentiated tumours. α (stretched exponential), K (kurtosis), f and D* (bi-exponential) were significantly different between tumour types. Strong correlation was observed between ADC and diffusion coefficients from other models. Non-mono-exponential models were preferred to the mono-exponential model in DW-MRI data from cervical tumours. Parameters of non-mono-exponential models showed significant differences between types and grades of tumours. (orig.)

  17. Separation of type and grade in cervical tumours using non-mono-exponential models of diffusion-weighted MRI

    Energy Technology Data Exchange (ETDEWEB)

    Winfield, Jessica M.; Collins, David J.; Morgan, Veronica A.; DeSouza, Nandita M. [The Royal Marsden NHS Foundation Trust, MRI Unit, Sutton, Surrey (United Kingdom); The Institute of Cancer Research, Cancer Research UK Cancer Imaging Centre, Division of Radiotherapy and Imaging, London (United Kingdom); Orton, Matthew R. [The Institute of Cancer Research, Cancer Research UK Cancer Imaging Centre, Division of Radiotherapy and Imaging, London (United Kingdom); Ind, Thomas E.J. [The Royal Marsden NHS Foundation Trust, Gynaecology Unit, London (United Kingdom); Attygalle, Ayoma; Hazell, Steve [The Royal Marsden NHS Foundation Trust, Department of Histopathology, London (United Kingdom)

    2017-02-15

    Assessment of empirical diffusion-weighted MRI (DW-MRI) models in cervical tumours to investigate whether fitted parameters distinguish between types and grades of tumours. Forty-two patients (24 squamous cell carcinomas, 14 well/moderately differentiated, 10 poorly differentiated; 15 adenocarcinomas, 13 well/moderately differentiated, two poorly differentiated; three rare types) were imaged at 3 T using nine b-values (0 to 800 s mm{sup -2}). Mono-exponential, stretched exponential, kurtosis, statistical, and bi-exponential models were fitted. Model preference was assessed using Bayesian Information Criterion analysis. Differences in fitted parameters between tumour types/grades and correlation between fitted parameters were assessed using two-way analysis of variance and Pearson's linear correlation coefficient, respectively. Non-mono-exponential models were preferred by 83 % of tumours with bi-exponential and stretched exponential models preferred by the largest numbers of tumours. Apparent diffusion coefficient (ADC) and diffusion coefficients from non-mono-exponential models were significantly lower in poorly differentiated tumours than well/moderately differentiated tumours. α (stretched exponential), K (kurtosis), f and D* (bi-exponential) were significantly different between tumour types. Strong correlation was observed between ADC and diffusion coefficients from other models. Non-mono-exponential models were preferred to the mono-exponential model in DW-MRI data from cervical tumours. Parameters of non-mono-exponential models showed significant differences between types and grades of tumours. (orig.)

  18. Acerca de la relación entre el campo de la salud, las representaciones de salud de los usuarios adolescentes y sus representaciones de participación en el campo de la salud de la Ciudad Autónoma de Buenos Aires Towards a relationship between health field, teenage rusers health represen tations and participation representations in caba health field

    Directory of Open Access Journals (Sweden)

    Leticia Grippo

    2007-12-01

    Full Text Available El presente es un informe del proyecto "Representaciones de participación en el campo de la salud de adolescentes usuarios del sistema público de salud de la CABA" dirigido por la Dra. María Cristina Chardon. El proyecto tiene como objetivo general indagar las representaciones de participación en el campo de la salud de adolescentes que utilizan el sistema público de salud de la CABA. Los objetivos específicos buscan identificar los niveles de conciencia de participación, las instancias del proceso participativo que atraviesan los/as usuarios/as adolescentes y los factores favorecedores y/o inhibitorios de la participación en el campo de la salud. Es un estudio cualitativo de carácter descriptivo y exploratorio que consta de tres fases: una fase inicial de revisión de aspectos conceptuales y actualización del estado del arte; una fase de salida al campo para la recolección de datos por medio de entrevistas en profundidad, observación simple/participante y grupos focales; y una fase final de análisis de datos desde la teoría emergente. Actualmente, hemos finalizado la fase inicial y como todavía no salimos a terreno para la recolección de datos, no contamos con material empírico para el análisis. De modo que este informe consta de una primera parte que da cuenta de la fase inicial consistente en la delimitación de los conceptos centrales del marco teórico y la actualización del estado del conocimiento; y una segunda parte compuesta por un apartado metodológico . La primera parte describe el campo de la salud en base a investigaciones sobre las lógicas de funcionamiento, las representaciones de salud/ enfermedad y el estatuto de la participación. También caracterizamos el campo de la salud de la CABA en base a la ley de salud y a investigaciones recientes que nos permitieron establecer la posición de los usuarios adolescentes como agentes del campo y las posibles relaciones entre la organización del campo y las

  19. Representaciones sociales sobre la problemática de Chagas en un servicio de salud comunitaria del Gran La Plata, Buenos Aires, Argentina.

    Science.gov (United States)

    Sanmartino, Mariana; Amieva, Carolina; Medone, Y Paula

    2017-03-01

    Hablar de Chagas es hablar de una problemática compleja, definida por elementos de carácter biomédico, epidemiológico, sociocultural y político, que se conjugan dinámicamente. En este trabajo buscamos identificar y analizar las representaciones sobre Chagas de los integrantes del equipo de salud de un centro de atención periurbano de la ciudad de La Plata, Argentina. Mediante un abordaje cualitativo, se realizaron entrevistas semiestructuradas y se analizaron las respuestas con la técnica del análisis de contenido. Los resultados mostraron que la mayor parte de las personas entrevistadas no contempla al Chagas como una problemática en su contexto laboral cotidiano y manifiestan un fuerte sesgo biologicista en su formación profesional. Con este trabajo señalamos la urgente necesidad de reflexionar críticamente en torno a la formación de los profesionales de la salud en relación a problemáticas socioambientales complejas de importancia regional, como lo es el Chagas.

  20. Representaciones de la pobreza en contextos de crisis. Un ejercicio desde el análisis crítico del discurso

    Directory of Open Access Journals (Sweden)

    Martín Echeverría Victoria

    2014-01-01

    Full Text Available Se presenta un ejercicio de análisis crítico del discurso cuyo propósito es establecer las representaciones cons - truidas por periodistas de opinión acerca de la pobreza, reproducidas en uno de los principales diarios de México en el momento estratégico de la crisis económica mundial de 2008 - 2009 . Utilizando un andamiaje de niveles y categorías textuales, retóricas e ideológicas, se analizó un corpus de catorce piezas publicadas a lo largo de nueves meses. El análisis constata la utilización amplia de falacias y recursos retóricos dirigidos a construir una caracterización estereotípica de la pobreza, representando a los sujetos como víctimas sin agencia y carenciados particularmente en el plano material, elidiendo otras dimensiones de la problemática. La atribución reiterada de la pobreza al gobierno, sin explicaciones vinculantes con la crisis económica, apunta a que el abordaje del tema es un medio utilizado para criticar a las instituciones gubernamentales, más que un intento de explicación del mismo. Descriptores: Pobreza, prensa, análisis del discurso, periodismo de opinión, ideología.

  1. Empoderamiento femenino y políticas públicas, una perspectiva desde las representaciones sociales de género

    Directory of Open Access Journals (Sweden)

    María Teresa Camberos Sánchez

    2011-01-01

    Full Text Available La presente investigación tiene como objetivo principal analizar las representaciones sociales de género de los empleadores de personal, sobre la inserción de mujeres en el mercado laboral, a través de puestos de dirección en empresas de servicios, de Jalisco (México. La investigación se llevará a cabo desde el paradigmacualitativo, mediante el método fenomenológico. Las técnicas a utilizar son la entrevista en profundidad y semiestructurada, así como el apoyo de técnicas cuantitativas de recolección de datos, las cuales estarán dirigidas a una muestra al azar y por conveniencia a hombres y mujeres empleadores de recursos humanos en las empresas de servicios. Las conclusiones se realizarán una vez terminado el trabajo de campo y concluido el análisis final de los datos cualitativos, obtenidos a partir del discurso de los informantes.

  2. Las representaciones de carros de Los Buitres (Capilla, Badajoz en la cronología del Arte esquemático típico

    Directory of Open Access Journals (Sweden)

    Julián BÉCARES PÉREZ

    2009-12-01

    Full Text Available RESUMEN: Se realiza una revisión crítica de las representaciones de carros de los abrigos V y X de Los Buitres de Capilla, habida cuenta de la importancia que se les ha concedido de cara a la datación del arte esquemático típico, ya que pueden considerarse como los principales responsables de la larga perduración que se suele atribuir a este ciclo artístico. Ponemos de manifiesto los problemas que existen para conferirles una datación concreta, y lo arriesgado de la utilización que se ha hecho de estos motivos, anómalos en el arte esquemático típico.RÉSUMÉ: Une revisión des representations des chariots des abris V y X de «Los Buitres de Capilla» a lieu, compte tenu de l'importance qu'on leur a donne face a la datation de l'art schématique typique, car ils peuvent étre consideres comme les principaux responsables de la grande subsistance qui est normalement atribuée á cette cycle artistique. On remarque les problémes pour donner une datation concrete ainsi que le danger de l'utilisation qu'on a fait de ees motifs, anomals dans l'art schématique typique.

  3. LO íntimo, lo doméstico y lo público: representaciones sociales y estilos de vida en la España ilustrada

    Directory of Open Access Journals (Sweden)

    Mónica BOLUFER PERUGA

    2009-12-01

    Full Text Available RESUMEN: A partir de los textos autobiográficos, correspondencia y otros escritos de diversos personajes vinculados al reformismo ilustrado en la España del siglo xviii, este trabajo estudia los modos en que en sus representaciones de la sociedad y sus imágenes de sí mismos se articulaban los ámbitos de lo íntimo, lo doméstico y lo público, poniendo de relieve las diferencias que este engarce presentaba para hombres y mujeres, tanto en lo social como en lo personal, así como la significativa evolución experimentada a lo largo de los últimos decenios del siglo xvín y en los primeros años del xix.ABSTRACT: Based on autobiographical writings, correspondence and other works of men and women linked to enlightened reformism in eighteenth-century Spain, this paper studies how they played with the notions of intimacy, domesticity and public life when representing models of social organization and building self images. Differences between men and women experiences and languages are underlined, as well as changes during the last decades of the eighteenth century and the beginning of the nineteenth century.

  4. Las movilizaciones del 4 de febrero y el 6 de marzo de 2008. Una lectura de las representaciones sociales en el discurso de la prensa nacional

    Directory of Open Access Journals (Sweden)

    Carolina Jaramillo Correa

    2010-01-01

    Full Text Available Las convocatorias y la respuesta a las marchas del 4 de febrero y el 6 de marzo de 2008 se han constituido como uno de los mayores impactos en términos de movilización ciudadana en Colombia. Los medios masivos de comunicación fueron actores decisivos para la divulgación de las marchas, y de persuasión para que los ciudadanos se sumaran o no a éstas. El equipo de investigación del proyecto Representaciones de las movilizaciones sociales por la paz en la prensa colombiana: 4 de febrero y 6 de marzo de 2008 recopiló las noticias sobre las marchas publicadas en tres diarios impresos de circulación nacional: el diario El Tiempo (el mayor periódico nacional, el diario El Colombiano (que representa la región del país con el índice más alto de movilizaciones sociales y el semanario Voz (que representa los sectores políticos de izquierda y pertenece al partido comunista. Este artículo presenta la clasificación y categorización de información desde la perspectiva del análisis del discurso (ad y una aproximación a los resultados de la categorización cualitativa de la información.

  5. LA CONSTRUCCIÓN DE REPRESENTACIONES SOCIALES ACERCA DE LA POBREZA Y DESIGUALDAD SOCIAL EN LOS NIÑOS DE LA REGIÓN CARIBE COLOMBIANA

    Directory of Open Access Journals (Sweden)

    José Amar Amar

    2001-01-01

    Full Text Available Este artículo presenta el informe de una investigación llevada a cabo en una muestra de 486 niños escolarizados, entre los 6 y los 18 años de edad en Barranquilla y algunos pueblos de la región Caribe colombiana. La muestra fue estratificada por edad, sexo y nivel socioeconómico. Se utilizó la entrevista clínica individual a profundidad piagetiana, con la cual se indagó acerca de las representaciones de los sujetos en cuanto a la descripción de ricos y pobres, la existencia de niveles socioeconómicos intermedios entre los usuales, la autocaracterización de los sujetos y el origen de las causas de la pobreza y desigualdad social y sus posibles soluciones. Los datos fueron analizados cuantitativamente y se utilizó el paquete estadístico SPSS/PC4.0 y el programa MICROSTAT, y cualitativamente a través del contenido de las respuestas. Los resultados muestran la existencia de cuatro niveles de desarrollo, con una clara secuencia evolutiva de acuerdo con la edad.

  6. Representaciones sociales de los docentes de Educación Primaria sobre la inclusión de escolares con discapacidad

    Directory of Open Access Journals (Sweden)

    Maritrini Rojas

    2017-12-01

    Full Text Available La discapacidad es un fenómeno social que ha estado inmerso en la arquitectura cultural de la sociedad, de la cual emergen diversos significados conceptuales con gran influencia sobre el abordaje pedagógico de quienes han sido identificados con esta etiqueta. El propósito del presente estudio se centra en la reconstrucción de las representaciones sociales que poseen los docentes de Educación Primaria en torno a la inclusión educativa de los escolares con discapacidad. El estudio se ubicó dentro del Paradigma Cualitativo, definido por García (2012 y con carácter Fenomenológico, según Rusque (2010. Para la metodología se utilizaron mecanismos discursivos conversacionales a través de la Entrevista en Profundidad, establecida por Pérez Serrano (s.f. El proceso de análisis e interpretación de la información estuvo orientado por el Método Comparativo Constante de Glasser y Straus (1967 y Strauss y Corbin (2002. A partir del análisis realizado, se pudo develar que a pesar de los avances que han surgido en beneficio de los escolares con discapacidad, se mantiene una visión desde los parámetros de la deficiencia.

  7. Social representations of needlestick injuries Representaciones Sociales de los accidentes con materiales corto-punzantes Representações sociais dos acidentes com materiais perfurocortantes

    Directory of Open Access Journals (Sweden)

    Juliana Almeida Marques Lubenow

    2012-12-01

    Full Text Available OBJECTIVES: understand the Social Representations about needlestick injuries elaborated by Nursing Technicians and analyze how these representations influence their conducts. METHOD: the data, obtained by interviews, were processed using ALCESTE software and their analysis was based on Serge Moscovici's Social Representations Theory. RESULTS: it was evidenced that, after the accident, these professionals take care of the affected area. Then, they report the accident, motivated by the fear of catching HIV and hepatitis. The different feelings experienced are due to this fear and the way they were forwarded by the institution, reflecting in the cause they attribute to their accident. CONCLUSIONS: it was verified that knowledge about the accident as a whole is very incipient in this professional group, demanding continuing education and greater emphasis on this subject in professional training. It is expected that this study draws public authorities and health institutions' attention to the problem and that it modifies Nursing Technicians' Social Representations about percutaneous exposure.OBJETIVOS: Comprender las Representaciones Sociales de los accidentes con materiales corto-punzantes, elaboradas por Técnicos de Enfermería, así como analizar de que modo esas representaciones influencian las conductas de eses profesionales. MÉTODO: Los datos, logrados por medio de entrevistas, fueron procesados por el software ALCESTE y el análisis de los mismos fue basado en la Teoría de las Representaciones Sociales de Serge Moscovici. RESULTADOS: se evidenció que, después de accidentarse, los Técnicos de Enfermería cuidan del área afectada. Enseguida, notifican el accidente, motivados por el miedo de que contraigan HIV y hepatitis. Los diversos sentimientos vividos son consecuentes de ese miedo y de la manera como fueron encaminados por la institución, reflejando en la causa que ellos atribuyen a su accidente. CONCLUSIONES: se constató que hay un

  8. Formación docente y representaciones sobre Salud: caminos para la Educación en Salud desde una mirada crítica

    Directory of Open Access Journals (Sweden)

    Fernando Garelli

    2017-05-01

    Full Text Available RESUMEN: Con el objetivo de realizar un aporte a la formación docente, presentamos un análisis de representaciones sobre salud a partir de definiciones y producciones gráficas en el marco de una experiencia pedagógica para docentes en ejercicio del nivel inicial, realizada entre 2012 y 2014. Las definiciones permitieron reconocer las ontologías subyacentes, mientras que las producciones gráficas desplegaron variados componentes y dimensiones, enriqueciendo a las definiciones. Identificamos una lectura de la salud centrada en el individuo, que relacionamos con categorías de trabajos anteriores como la salud como estilo de vida, la salud como equilibrio y el enfoque educativo comportamental. La reflexión crítica respecto de las prácticas asociadas a esta mirada fue, en nuestra experiencia, una de las puertas de entrada para desnaturalizar lo existente y fomentar perspectivas más complejas, multidimensionales y críticas.

  9. El Camellón “Once de Noviembre”: prácticas culturales y representaciones en el espacio público de Sincelejo. 1910 – 1945

    Directory of Open Access Journals (Sweden)

    Gilberto Emiro Martínez Osorio

    2016-01-01

    Full Text Available En una aproximación histórica realizada desde el enfoque de la historia cultural urbana, en este artículo se realiza una exploración sobre las prácticas culturales, las representaciones y las significaciones contenidas en uno de los espacios urbanos más emblemáticos de la ciudad de Sincelejo, “El Camellón Once de Noviembre”. El estudio utiliza como método, el análisis crítico de los discursos relacionados con el lugar en mención, presentes en la colección de prensa sincelejana de comienzos del siglo XX, disponible en la Biblioteca Nacional de Colombia en Bogotá. Se da cuenta aquí, de los procesos relacionados con la construcción de la obra y la apropiación del lugar como centro social de la ciudad.

  10. Los jóvenes y la salud. Construcción de grupos en función de representaciones sobre salud y enfermedad

    Directory of Open Access Journals (Sweden)

    Weller Silvana Inés

    1997-01-01

    Full Text Available El objetivo de este trabajo fue indagar la existencia de diferentes "grupos" de jóvenes en función de sus representaciones alrededor de la salud y la enfermedad. En la construcción de estos "grupos" se busca incorporar conceptos tradicionalmente relegados al estudio de la subjetividad. Se trabajó con una encuesta cerrada que se aplicó sobre 400 jóvenes escolarizados. El procesamiento de los datos se realizó con el análisis de correspondencias múltiples, una técnica de análisis multivariado especialmente diseñada para trabajar con un alto número de variables cualitativas. El estudio permitió despejar ocho "tipos" de jóvenes ­ los asustados, los que cierran los ojos, los hipocondríacos, los sensuales, los felices, los amargados, los que miran al mundo y los que miran su ombligo. Estos resultados indicarían la necesidad de diversificar las estrategias de indagación e intervención en terreno dirigidas a esta población.

  11. El poder de las representaciones sociales: M. Butterfly, la mujer perfecta The power of social representations: M. Butterfly, the perfect woman

    Directory of Open Access Journals (Sweden)

    Maria Angela Silveira Paulilo

    2011-07-01

    Full Text Available En este trabajo se presenta un análisis del film M. Butterfly , dirigido por David Cronenberg, en 1993 y se trata de una versión basada en la ópera “Madame Butterfly” de Puccini.  El objetivo es demostrar el poder y la fuerza de las representaciones sociales como mecanismos de producción de sentido que permitem que los sujetos sociales construyan, desconstruyan y reconstruyan el mundo en que viven y para el cual buscan sentido.This paper presents an analysis of the film M. Butterfly, directed by David Cronenberg, in 1993. This film is a version based on the opera Madame Butterfly, by Puccini. It aims to demonstrate the power and the strength of social representations as mechanisms for the production of meaning which allow social actors to construct, deconstruct and reconstruct the world in which they live and for which they loook for its meaning.

  12. Trabajar como artista. Estrategias, prácticas y representaciones del trabajo artístico entre jóvenes artistas circenses

    Directory of Open Access Journals (Sweden)

    Julieta Infantino

    2011-12-01

    Full Text Available La persistencia del supuesto que coloca al arte como esfera diferencial y autónoma, ha provocado la invisibilización de la dimensión laboral de las prácticas artísticas asentando representaciones sociales dicotómicas acerca del arte y el trabajo. Consecuentemente, éste es un terreno poco explorado en el ámbito de las investigaciones sobre Juventud y Trabajo. No obstante, muchos artistas y muchos jóvenes trabajan desde el arte que realizan. A partir del caso de los artistas circenses en la ciudad de Buenos Aires, discutiremos esta idea de oposición entre arte y trabajo recorriendo los espacios de inserción laboral, las estrategias de trabajo y los sentidos que los artistas otorgan a sus prácticas. Analizaremos las distinciones entre las características de la práctica artístico-laboral en la década de 1990 y en la coyuntura actual en relación a transformaciones recientes en el mercado laboral y a cambios en el lugar de legitimación ocupado por el arte circense.

  13. Mono Test

    Science.gov (United States)

    ... PF4 Antibody Hepatitis A Testing Hepatitis B Testing Hepatitis C Testing HER2/neu Herpes Testing High-sensitivity C-reactive Protein (hs-CRP) Histamine Histone Antibody HIV Antibody and HIV Antigen (p24) HIV Antiretroviral Drug Resistance Testing, Genotypic HIV Viral Load HLA Testing HLA- ...

  14. PC Graphic file programing

    International Nuclear Information System (INIS)

    Yang, Jin Seok

    1993-04-01

    This book gives description of basic of graphic knowledge and understanding and realization of graphic file form. The first part deals with graphic with graphic data, store of graphic data and compress of data, programing language such as assembling, stack, compile and link of program and practice and debugging. The next part mentions graphic file form such as Mac paint file, GEM/IMG file, PCX file, GIF file, and TIFF file, consideration of hardware like mono screen driver and color screen driver in high speed, basic conception of dithering and conversion of formality.

  15. MRI gel dosimetry for verification of mono-isocentric junction doses in head and neck radiotherapy

    International Nuclear Information System (INIS)

    Back, S.A.J.; Jayasekera, P.M.; Lepage, M.; Baldock, C.; Menzies, N.; Back, P.

    2000-01-01

    Full text: The use of independent collimators in the abutment of two adjacent treatment volumes, as in head and neck radiation treatments, consists typically of positioning the collimator rotation axis (CRA) at the junction of the volumes, and offsetting each field by its half-field width. This has the effect of positioning one of the collimator jaws at the CRA for each field. However, misalignment of the jaws can lead to variations in dose uniformity in the junction region. We have used gel dosimetry to measure junction doses in three dimensions. PAG gel MRI was used to investigate junction dosimetry for a mono-isocentriic treatment of two orthogonal pairs of opposed (ant/post and lateral) 6 MV x-ray beams. PAG gels in an 11cm diameter cylindrical gel phantom were imaged using a Siemens Vision 1.5 T MRI. The exposures were made using a Philips SL 20 linear accelerator with independent jaws that were known to overlap at the isocentre for sequential abutting offset (within manufacturer's specifications for symmetric fields). X-Omat V films were exposed in mono-directional beams, and optically scanned for comparison. Measurements of off-axis ratios and of relative depth profiles using gel MRI and perpendicular film were in excellent agreement with each other. Measurements through the multi-directional junction at the isocentre are illustrated in the graph, for orthogonal planes centred at the isocentre of the neck phantom. They demonstrate a minimum dose of 75 % of that of the adjacent 'treatment' regions, which agrees closely with the results measured (72%) in the mono-directional case with film. We conclude that this measurement confirms that junction dosimetry at the isocentre measured with perpendicular film for a single direction is a good approximation to the situation in multiple directions. Copyright (2000) Australasian College of Physical Scientists and Engineers in Medicine

  16. Compartmentation of mono- and sesqui-terpene biosynthesis of the essential oil in poncirus trifoliata

    International Nuclear Information System (INIS)

    Heinrich, G.; Wegener, R.; Schultze, W.

    1980-01-01

    The fruit of Poncirus trifoliata shows glandular cells complexes in the exocarp, which produce a volatile oil rich in monoterpenes but poor in sesquiterpenes and oxigenated compounds. The juice vesicles of the endocarp possess similar cell complexes mainly containing sesquiterpenes and oxigenated compounds, whereas monoterpenes only occur in small amounts. By the use of combined gas chromatography-mass spectrometry 19 components of the rind oil and 15 compounds of the endocarp oil could be identified. As demonstrated by electron microscopy the terpenes most probably are synthesized predominantly, if not exclusively in plastids. As shown by gasradiochromatography radioactive precursors ( 14 Co 2 and 14 C-leucine) are incorporated into mono- and sesqui-terpenes to a different extent. This is due to two gland types producing essential oils of different composition with regard to their mono- and sesqui-terpene percentage. In fruit development the exocarp glands differentiate earlier than the endocarp glands do. The activity of exogenously applied 14 Co 2 first reaches the peripheral glands and later on appears in the interior glands. Depending upon the growth season, labelled leucine transported by the conducting tissues from lower plant parts leads to a high specific activity of the sesqui-terpenes and oxigenated compounds. It could be argued that in this instance the glands of the pulp are better provided with precursors than the exocarp glands. The successive maxima of essential oil production in both glandular complexes, and the changes in the concentration of individual oil constituents during the ontogeny of the fruit also contribute to different incorporation ratios of radioactive precursors into mono- and sesqui-terpenes. (author)

  17. Structure of the Mina Deflection in Mono Lake, CA: Inferences from Paleoseismology

    Science.gov (United States)

    Sangani, Radhika Chandrakant

    Walker Lane, a zone of transcurrent faulting along the Sierran range front, is dominated by NNW trending normal faults. Within the Walker Lane, the Mina Deflection is a region of structural anomaly, where a significant component of regional displacement and seismicity is transferred from NNW-trending faults to ENE-trending faults of the Excelsior-Coledale domain. Geographically, the western boundary of the Mina Deflection lies along the western margin of Mono Basin. This is kinematically implied by the distributed tensional and shear stress in the NNW- and ENE- trending faults of the region. Transfer of strain from the NNW-trending, right-lateral oblique slip faults to the ENE-trending, primarily left-lateral faults is poorly understood. The nature of this transfer is complicated by the presence of the young volcanics of Mono Lake at the stepover bend. I undertook detailed study of the sub-km scale geometry and kinematics of the stepover bend, and its relation to nearby recent magmatic fluid flow within the Mono Lake. Fault orientations, slip rates and ages of most recent events allow for understanding strain transfer between faulting and volcanism. The results suggest that strain is transferred from the outer arc to the inner arc of the stepover bend. Within the inner arc, the magmatism on Paoha Island seems to have arisen from a sill-like intrusion. Furthermore, strain transfer is accomplished through sets of faults and fissures that variously act as large-scale Reidel shears and tension gashes allowing the migration of magmatic fluids from depth.

  18. Polyelectrolyte Properties in Mono and Multi-Valent Ionic Media: Brushes and Complex Coacervates

    Science.gov (United States)

    Farina, Robert M.

    Materials composed of polyelectrolytes have unique and interesting physical properties resulting primarily from their charged monomer segments. Polyelectrolytes, which exist in many different biological and industrial forms, have also been shown to be highly responsive to external environmental changes. Here, two specific polyelectrolyte systems, brushes and complex coacervates, are discussed in regards to how their properties can be tailored by adjusting the surrounding ionic environment with mono and multi-valent ions. End-tethered polyelectrolyte brushes, which constitute an interesting and substantial portion of polyelectrolyte applications, are well known for their ability to provide excellent lubrication and low friction when coated onto surfaces (e.g. articular cartilage and medical devices), as well as for their ability to stabilize colloidal particles in solution (e.g. paint and cosmetic materials). These properties have been extensively studied with brushes in pure mono-valent ionic media. However, polyelectrolyte brush interactions with multi-valent ions in solution are much less understood, although highly relevant considering mono and multi-valent counterions are present in most applications. Even at very low concentrations of multi-valent ions in solution, dramatic polyelectrolyte brush physical property changes can occur, resulting in collapsed chains which also adhere to one another via multi-valent bridging. Here, the strong polyelectrolyte poly(sodium styrene sulfonate) was studied using the Surface Forces Apparatus (SFA) and electrochemistry in order to investigate brush height and intermolecular interactions between two brushes as a function of multi-valent counterion population inside a brush. Complex coacervates are formed when polyanions and polycations are mixed together in proper conditions of an aqueous solution. This mixing results in a phase separation of a polymer-rich, coacervate phase composed of a chain network held together via

  19. Mono-colonization with Lactobacillus acidophilus NCFM affects the intestinal metabolome in mice

    DEFF Research Database (Denmark)

    Roager, Henrik Munch; Sulek, Karolina; Skov, Kasper

    (NCFM) on the intestinal metabolome (jejunum, caecum, and colon) in mice by comparing NCFM mono-colonized (MC) mice with GF mice using liquid chromatography coupled to mass-spectrometry (LC-MS). The study adds to existing evidence that NCFM in vivo affects the bile acid signature of mice......-tocopherol acetate) in higher levels in the intestine of GF mice compared to MC mice, suggesting that NCFM either metabolizes the compound or indirectly affects the absorption by changing the metabolome in the intestine. The use of NCFM to increase the uptake of vitamin E supplements in humans and animals...

  20. Antagonistic Mono- and Bi-Articular Lower-Limb Muscle Activities’ Model Characterization at Different Speeds

    Directory of Open Access Journals (Sweden)

    Dzahir M.A.M

    2017-01-01

    Full Text Available Nowadays, medical rehabilitation system has become a requirement due to increment in national rehabilitation centres and medical hospitals. An assistive rehabilitation orthosis becomes essential and was used for rehabilitation therapy, condition monitoring, and physical strengthening. This study focused on the lower limb assistive rehabilitation orthosis development using pneumatic artificial muscle. To successfully control this orthosis system which consists of antagonistic mono- and biarticular muscle actuators, it is necessary to construct a reliable control algorithm. The suitable control scheme and strategy to manoeuvre this orthosis system similar to human musculoskeletal system have yet to be fully developed and established. Based on the review study, it is said that the co-contraction controls of anterior-posterior pneumatic muscles was able to improve the joint stiffness and stability of the orthosis as well as good manoeuvrability. Therefore, a characterization model of an antagonistic mono- and bi-articular muscles activities of human's lowerlimb during walking motion will be necessary. A healthy young male subject was used as test subject to obtain the sEMG muscle activities for antagonistic mono- and bi-articular muscles (i.e., Vastus Medialis-VM, Vastus Lateralis-VL, Rectus Femoris-RF, and Bicep Femoris-BF. The tests were carried out at different speeds of 2km/h, 3km/h, and 4km/h for one minute walking motion on a treadmill. Then, the patterns of the sEMG muscle activities were modelled and characterised using fifth order polynomial equation. Based on the results, it is shown that the anterior and posterior muscles were exhibited a muscle synergy in-between multiple anterior or posterior muscles and muscle co-contraction between anteriorposterior muscles in order to control the movements at the joints during walking motion. As conclusion, it is proven that the sEMG muscle activities of the antagonistic mono- and bi

  1. Hydrolysis of Zr(4) with formation of mono- and polynuclear hydroxocomplexes in solutions

    International Nuclear Information System (INIS)

    Davydov, Yu.P.; Zabrodskij, V.N.

    1987-01-01

    The state of Zr(4) has been studied in the wide range of H + -ions concentrations (10 -3 -3.0 mol/l) and in the wide range of Zr(4) concentrations (10 -13 -10 -12 mol/l) in the solution using a set of such physical-chemical methods as spectrophotometry, ion exchange, dialysis, centrifugation. The conditions of formation of hydrated cations, monochange, dialysis, centrifugation. The conditions of formation of hydrated cations, mono- and polynuclear hydrocomplexes, colloidal-size particles have been determined. The thermodynamic stability of ZrOH 3+ and Zr(OH) 2 2+ complexes has been determined by the ion exchange and spectrophotometry methods

  2. Forced vibration and wave propagation in mono-coupled periodic structures

    DEFF Research Database (Denmark)

    Ohlrich, Mogens

    1986-01-01

    This paper describes the wave propagation and vibration characteristics of mono-coupled structures which are of spatially periodic nature. The receptance approach to periodic structure theory is applied to study undamped periodic systems with composite structural elements; particular emphasis...... and a general `closed form' solution is found for the forced harmonic response at element junctions. This `junction-receptance' is used to determine-discrete junction mode shapes of a finite system. Finally, the forced response of a finite structure with an internal obstruction is derived as a natural extension...... of the determination of the junction-receptance. The influence of such a disorder is illustrated by a simple example...

  3. Degradation of a mono sulfonated azo dye by an integrated bio sorption and anaerobic system

    International Nuclear Information System (INIS)

    Goncalves, L. C.; Campos, R.; Pinheiro, H. M.; Lopes, A.; Ferra, M. I.

    2009-01-01

    A simulated textile effluent containing a mono sulphonated azo dye was fed to an anaerobic bioreactor in which a natural adsorbent, spent brewery grains (SBG), was incorporated. SABG is a by-product of the brewing industry and could act as adsorbent as well an electron shuttle (lignin fraction) in the dye degradation mechanism. Furthermore, it can also work as a conditioner for the anaerobic biomass. The influence of the dye (Acid Orange 7, AO7) concentration (60 and 150 mg/L) and the presence of SBG in the performance of upflow anaerobic sludge blanket reactor (UASB) was evaluated. (Author)

  4. A Tephra Database With an Intelligent Correlation System, Mono-Inyo Volcanic Chain, CA

    Science.gov (United States)

    Bursik, M.; Rogova, G.

    2004-12-01

    We are assembling a web-accessible, relational database of information on past eruptions of the Mono-Inyo volcanic chain, eastern California. The PostgreSQL database structure follows the North American Data Model and CordLink. The database allows us to extract the features diagnostic of particular pyroclastic layers, as well as lava domes and flows. The features include depth in the section, layer thickness and internal stratigraphy, mineral assemblage, major and trace element composition, tephra componentry and granulometry, and radiocarbon age. Our working hypotheses are that 1) the database will prove useful for unraveling the complex recent volcanic history of the Mono-Inyo chain 2) aided by the use of an intelligent correlation system integrated into the database system. The Mono-Inyo chain consists of domes, craters and flows that stretch for 50 km north-south, subparallel to the Sierran range front fault system. Almost all eruptions within the chain probably occurred less than 50,000 years ago. Because of the variety of magma and eruption types, and the migration of source regions in time and space, it is nontrivial to discern patterns of behaviour. We have explored the use of multiple artificial neural networks combined within the framework of the Dempster-Shafer theory of evidence to construct a hybrid information processing system as an aid in the correlation of Mono-Inyo pyroclastic layers. It is hoped that such a system could provide information useful to discerning eruptive patterns that would otherwise be difficult to sort and categorize. In a test case on tephra layers at known sites, the intelligent correlation system was able to categorize observations correctly 96% of the time. In a test case with layers at one unknown site, and using a pairwise comparison of the unknown site with the known sites, a one-to-one correlation between the unknown site and the known sites was found to sometimes be poor. Such a result could be used to aid a

  5. Degradation of a mono sulfonated azo dye by an integrated bio sorption and anaerobic system

    Energy Technology Data Exchange (ETDEWEB)

    Goncalves, L. C.; Campos, R.; Pinheiro, H. M.; Lopes, A.; Ferra, M. I.

    2009-07-01

    A simulated textile effluent containing a mono sulphonated azo dye was fed to an anaerobic bioreactor in which a natural adsorbent, spent brewery grains (SBG), was incorporated. SABG is a by-product of the brewing industry and could act as adsorbent as well an electron shuttle (lignin fraction) in the dye degradation mechanism. Furthermore, it can also work as a conditioner for the anaerobic biomass. The influence of the dye (Acid Orange 7, AO7) concentration (60 and 150 mg/L) and the presence of SBG in the performance of upflow anaerobic sludge blanket reactor (UASB) was evaluated. (Author)

  6. Literature review on cyclic lateral loading effects of mono-bucket foundations

    DEFF Research Database (Denmark)

    Kapitanov, Lachezar Rosenov; Duroska, Peter; Quirante, Cesar Antonio Garcia

    2016-01-01

    and consequently cost-effectiveness compared to other common solutions. The long-term cyclic loading can cause degradation of soil-bucket system stiffness, which yields into accumulated and permanent deformations. Despite of the advantages, there is no standard procedure to design the foundation especially...... calculation is highly demanded at the different design phases. The intention of the current study is to present, review and summarize the existing techniques to assess the effect of cyclic loading on Mono-Bucket foundations while emphasizing the advantage and disadvantage of each of them. Additionally...

  7. Selfenergy effect on the magnetic ordering transition in the mono- and bilayer honeycomb Hubbard model

    Energy Technology Data Exchange (ETDEWEB)

    Honerkamp, Carsten [Institute for Theoretical Solid State Physics, RWTH Aachen University (Germany); JARA - Fundamentals of Future Information Technology, Aachen (Germany)

    2017-11-15

    We investigate the impact of electron self-energy corrections on potential antiferromagnetic ordering instabilities in mono- and bilayer graphene, modeled by a Hubbard-type lattice model with onsite interactions among the electrons, using a self-consistent random phase approximation (RPA). In qualitative agreement with earlier studies we find that the electronic interactions cause non-Fermi liquid behavior at low energies. In self-consistent RPA, the transition scales for antiferromagnetic ordering are renormalized significantly by these self-energy effects, both for interaction-driven and temperature-driven cases. (copyright 2017 by WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

  8. Primary studies of trace quantities of green vegetation in Mono Lake area using 1990 AVIRIS data

    Science.gov (United States)

    Chen, Zhi-Kang; Elvidge, Chris D.; Groeneveld, David P.

    1992-01-01

    Our primary results in Jasper Ridge Biological Preserve indicate that high spectral resolution Airborne Visible/Infrared Imaging Spectrometer (AVIRIS) data may provide a substantial advantage in vegetation, based on the chlorophyll red edge feature from 700-780 nm. The chlorophyll red edge was detected for green vegetation cover as low as 4.8 percent. The objective of our studies in Mono Lake area is to continue the experiments performed in Jasper Ridge and to examine the persistence of red edge feature of trace quantities of green vegetation for different plant communities with non-uniform soil backgrounds.

  9. Biological significance of lysine mono-, di- and trimethylation on histone and non-histone proteins

    International Nuclear Information System (INIS)

    Perez-Burgos, L.

    2006-01-01

    Histones are the proteins that compact DNA into the repeating unit of chromatin known as the nucleosome. The N-termini of histones are subject to a series of post-translational modifications, one of which is methylation. This modification is termed 'epigenetic' because it extends the information encoded in the genome. Lysines can be mono-, di- or tri-methylated at different positions on histones H1, H3 and H4. In order to study the biological role of histone lysine methylation, antibodies were generated against mono-, di- and trimethylated H3-K9 and H3-27. Indeed, different chromatin domains in the mouse nucleus are enriched in distinct forms of histone lysine methylation, such as pericentric heterochromatin and the inactive X chromosome. Interestingly, heterochromatin in Arabidopsis thaliana is enriched in the mono- and di-, but not the trimethylated form of H3-K9. Furthermore, there exists a hierarchy of epigenetic modifications in which H3-K9 trimethylation is found to be upstream of DNA methylation on mouse major satellites. Histone lysine methylation is also involved in gene regulation upon development. One example is the chicken 61538;-globin locus, a region of facultative chromatin that undergoes a loss of di- and trimethylated H3-K27 in mature red blood cells, concomitant with expression of the 61538;-globin genes. SET-domain proteins are enzymes that methylate histones, but some of them are also able to methylate non-histone substrates. In particular, p53 is methylated by Set9 on lysine 372, G9a and Glp-1 on lysine 373 and by Smyd2 on lysine 370. Smyd2 transcript levels are greatly increased upon irradiation and dimethylated p53-370 specifically binds to 53BP1, a protein involved in recognizing DNA double-stranded breaks upon ionizing radiation. These results argue for a novel role of p53-K370 methylation in the biology of DNA damage. In summary, lysine methylation is a post-translational modification that can occur both on histone and non-histone proteins

  10. Transplacental transfer of monomethyl phthalate and mono(2-ethylhexyl) phthalate in a human placenta perfusion system

    DEFF Research Database (Denmark)

    Mose, Tina; Knudsen, Lisbeth E; Hedegaard, Morten

    2007-01-01

    The transplacental passage of monomethylphtalate (mMP) and mono (2-ethylhexyl) phthalate (mEHP) was studied using an ex vivo placental perfusion model with simultaneous perfusion of fetal and maternal circulation in a single cotyledon. Umbilical cord blood and placental tissue collected both before...... plasma samples. mMP and possibly other short-chained phthalate monoesters in maternal blood can cross the placenta by slow transfer, whereas the results indicate no placental transfer of mEHP. Further studies are recommended....

  11. Representaciones sociales del derecho a la atención de la salud de un grupo de mujeres pobres Social representations of health attention rights in a poor woman group

    Directory of Open Access Journals (Sweden)

    Yamila Comes

    2006-12-01

    Full Text Available El OBJETIVO del trabajo es rastrear las representaciones del derecho a la atención de la salud en un grupo de mujeres pobres. Se utilizó una ESTRATEGIA METODOLÓGICA cualitativa, se realizaron 25 entrevistas semiestructuradas y la técnica de mapa asociativo para el rastreo de representaciones. La construcción de categorías se realizó conforme a la Teoría Fundamentada. CONCLUSIONES: El núcleo central de la mayoría de los discursos pareciera abonar al concepto de igualdad sin embargo la definición de igualdad que sostienen denota correspondencia con posiciones teóricas del liberalismo que plantean "a cada quien según sus necesidades esenciales" y que se incluye en las formas actuales de la beneficencia. La construcción de ciudadanía plena basada en la garantía de los derechos sociales y humanos con carácter de igualdad y cobertura universal implicaría una transformación de estas representaciones.The aim of this work is to study the social representations of the right to heatlh attention of poor women selected by theoretical sampling. The methodology strategy is cualitative. Twenty five semistructured interviews were done and the associative map technique was applied. The construction of the categories was based on the Grounded Theory principles. Results: The central nucleus of most of the discourses is related with the equality concept. But this equality definition denotes correspondence with theoretical positions of liberalism related with charity concepts ("to every one according to his essential necessities". The construction of a total citizenship based on the human and social rights guarantee with equality character and universal cover will need the transformation of this representations.

  12. Mono and bimetallic nanoparticles of gold, silver and palladium-catalyzed NADH oxidation-coupled reduction of Eosin-Y

    Science.gov (United States)

    Santhanalakshmi, J.; Venkatesan, P.

    2011-02-01

    Mono metallic (Au, Ag, Pd) and bimetallic (Au-Ag, Ag-Pd, Au-Pd) with 1:1 mol stoichiometry, nanoparticles are synthesized using one-pot, temperature controlled chemical method using cetyltrimethylammonium bromide (CTAB) as the capping agent. The particle sizes (Au = 5.6, Ag = 5.0, Pd = 6.0, Au-Ag = 9.2, Ag-Pd = 9.6, Au-Pd = 9.4 nm) are characterized by UV-Vis, HRTEM, and XRD measurements, respectively. CTAB bindings onto mono and bimetallic nanoparticles are analyzed by FTIR spectra. The catalytic activities of mono and bimetallic nanoparticles are tested on the reaction between NADH oxidation and Eosin-Y reduction. The effects of base, pH, ionic strength, nature of mono and bimetallic catalysts are studied and the reaction conditions are optimized. Bimetallic nanoparticles exhibited better catalysis than the mono metallic nanoparticles, which may be due to the electronic effects of the core to shell metal atoms.

  13. Mono and bimetallic nanoparticles of gold, silver and palladium-catalyzed NADH oxidation-coupled reduction of Eosin-Y

    International Nuclear Information System (INIS)

    Santhanalakshmi, J.; Venkatesan, P.

    2011-01-01

    Mono metallic (Au, Ag, Pd) and bimetallic (Au–Ag, Ag–Pd, Au–Pd) with 1:1 mol stoichiometry, nanoparticles are synthesized using one-pot, temperature controlled chemical method using cetyltrimethylammonium bromide (CTAB) as the capping agent. The particle sizes (Au = 5.6, Ag = 5.0, Pd = 6.0, Au–Ag = 9.2, Ag–Pd = 9.6, Au–Pd = 9.4 nm) are characterized by UV–Vis, HRTEM, and XRD measurements, respectively. CTAB bindings onto mono and bimetallic nanoparticles are analyzed by FTIR spectra. The catalytic activities of mono and bimetallic nanoparticles are tested on the reaction between NADH oxidation and Eosin-Y reduction. The effects of base, pH, ionic strength, nature of mono and bimetallic catalysts are studied and the reaction conditions are optimized. Bimetallic nanoparticles exhibited better catalysis than the mono metallic nanoparticles, which may be due to the electronic effects of the core to shell metal atoms.Graphical Abstract

  14. Biochemical Properties of a New Cold-Active Mono- and Diacylglycerol Lipase from Marine Member Janibacter sp. Strain HTCC2649

    Directory of Open Access Journals (Sweden)

    Dongjuan Yuan

    2014-06-01

    Full Text Available Mono- and di-acylglycerol lipase has been applied to industrial usage in oil modification for its special substrate selectivity. Until now, the reported mono- and di-acylglycerol lipases from microorganism are limited, and there is no report on the mono- and di-acylglycerol lipase from bacteria. A predicted lipase (named MAJ1 from marine Janibacter sp. strain HTCC2649 was purified and biochemical characterized. MAJ1 was clustered in the family I.7 of esterase/lipase. The optimum activity of the purified MAJ1 occurred at pH 7.0 and 30 °C. The enzyme retained 50% of the optimum activity at 5 °C, indicating that MAJ1 is a cold-active lipase. The enzyme activity was stable in the presence of various metal ions, and inhibited in EDTA. MAJ1 was resistant to detergents. MAJ1 preferentially hydrolyzed mono- and di-acylglycerols, but did not show activity to triacylglycerols of camellia oil substrates. Further, MAJ1 is low homologous to that of the reported fungal diacylglycerol lipases, including Malassezia globosa lipase 1 (SMG1, Penicillium camembertii lipase U-150 (PCL, and Aspergillus oryzae lipase (AOL. Thus, we identified a novel cold-active bacterial lipase with a sn-1/3 preference towards mono- and di-acylglycerides for the first time. Moreover, it has the potential, in oil modification, for special substrate selectivity.

  15. Representaciones sociales sobre la crisis ambiental de profesores de química en formación inicial de la Universidad Pedagógica Nacional

    Directory of Open Access Journals (Sweden)

    Yair Alexánder Porras Contreras

    2015-12-01

    Full Text Available El propósito del presente artículo se centra en el reconocimiento de las representaciones sociales de la crisis ambiental, que circulan en un grupo de profesores en formación inicial de la Licenciatura en Química de la Universidad Pedagógica Nacional de Colombia (upn, tomando como referente el enfoque estructural de la representación social, cuya orientación metodológica se apoya en los análisis de carácter prototípico y categorial, sustentados por la técnica de evocación de palabras, con la cual se estudia la importancia que las personas atribuyen a la crisis ambiental, según la frecuencia y rango con los cuales se evocan los términos, aspecto fundamental para reconocer el núcleo central de la representación social y su sistema periférico. Para la mayoría de docentes en formación, la crisis ambiental está vinculada a los imaginarios, los valores culturales compartidos, los aprendizajes y las prácticas sociales, que definen el comportamiento, la comprensión y las relaciones entre los seres humanos y el entorno. En la presente investigación se reconocen cinco dominios o categorías sobre la crisis ambiental: materialista, ético-moral, sociocultural, educativo, científico-tecnológico, los cuales reafirman el carácter polisémico, multicultural y pluriparadigmático en el que se construyen percepciones, ideas, creencias, concepciones y representaciones de la realidad ambiental, fundamentales para iniciar una discusión sobre los conocimientos ambientales que se construyen en la universidad, junto con la praxis pedagógica que orienta las propuestas de formación de profesores enfocadas al desarrollo de una ciudadanía ambiental. La crisis ambiental se relaciona directamente con la crisis de la identidad y con ella el incremento de problemáticas asociadas con el deterioro de la autoimagen, el autocuidado, la autoestima y la carencia de valores ambientales. Es también una crisis de la alteridad, que se refleja en la

  16. Representaciones sociales sobre dengue en docentes de Argentina en dos contextos epidemiológicos: aportes para la formación docente

    Directory of Open Access Journals (Sweden)

    Fernando Garelli

    2017-01-01

    Full Text Available Entendemos al dengue como una problemática compleja de salud socioambiental. Considerada la enfermedad viral transmitida por artrópodos de mayor importancia en el mundo, se ha instalado en la Argentina con gran significatividad social y epidemiológica, especialmente en periodos epidémicos. Durante este año, 2016, oficialmente se registraron alrededor de 40.000 casos (la mayor cantidad de la historia y la problemática tuvo un intenso tratamiento en los medios de comunicación. En el marco de un abordaje de la problemática desde la investigación educativa, basándonos en información empírica obtenida en talleres de formación, realizamos un análisis de representaciones sociales de docentes de primaria. Los procesos de formación docente fueron implementados en dos provincias de Argentina, una con baja incidencia de casos y otra con altos niveles de transmisión. En los resultados identificamos un patrón común, constituido por un sesgo inicial hacia la dimensión biomédica, siendo el mosquito y los síntomas, entre otras, las primeras imágenes más fuertemente asociadas al dengue. Esto resultó un punto de partida a partir del cual, luego del trabajo grupal en los talleres, emergieron con más fuerza otras dimensiones, destacándose particularmente la política y, en menor medida, la sociocultural, relacionada con la información y su circulación social. Finalmente, en las actividades elaboradas para desarrollar en los contextos educativos de cada docente, identificamos una gran frecuencia de propuestas vinculadas principalmente con la difusión en las que solamente aparecían las dimensiones biomédica y sociocultural, prácticamente con igual peso. Así, el contenido de las representaciones de los/as docentes en ambos contextos se vería principalmente caracterizado por la dimensión biomédica mientras que la multidimensionalidad, que incorpora nociones políticas, socioculturales y otras, si bien con menor peso, adquirir

  17. The influence of the representation loads in the voltage stability; Influencia de la representacion de las cargas en la estabilidad de voltaje

    Energy Technology Data Exchange (ETDEWEB)

    Morales Gonzalez, Eduardo

    2005-12-15

    condiciones estresadas, el colapso de voltaje se han convertido en un problema en la operacion de los mismos. Por consiguiente, la determinacion de limites de operacion confiables respecto a la estabilidad y colapso de voltaje han cobrado importancia para garantizar la operacion segura y economica del sistema electrico. Con el proposito de comprender los mecanismos de la estabilidad y colapso de voltaje, se han propuesto aproximaciones de estudio para el analisis de tales problemas. Una caracteristica comun de estas aproximaciones es la importancia de modelos confiables para representar las caracteristicas de la carga. Como resultado de esto, el desarrollo de modelos matematicos adecuados para la representacion confiable de la misma ha recibido gran atencion. A pesar de estos esfuerzos, el modelado de carga continua sigue siendo un gran reto en el analisis de la estabilidad de voltaje. En esta tesis se trata la influencia que tiene el modelado de la carga en la estabilidad de voltaje utilizando aproximaciones de analisis de estado estable. El analisis de estabilidad de voltaje del sistema se lleva a cabo con las curvas P-V para diferentes representaciones, ademas de utilizar indices de sensibilidad para completar el analisis. Finalmente, se presentan los resultados numericos de dos sistemas de prueba para resaltar la relacion entre los limites de estabilidad de voltaje y el modelo de carga utilizado.

  18. La violencia en las relaciones de pareja en Medellín y sus representaciones sociales / The intimate partner violence in Medellín and its social representations

    OpenAIRE

    Ariza Sosa, Gladys Rocío

    2011-01-01

    La violencia en las relaciones de pareja es un problema de salud pública, en el cual subyacen las construcciones culturales de género. El objetivo de la tesis, estructurada en siete capítulos, es comprender las representaciones sociales de las personas agredidas, agresoras y quienes les atienden, sobre la violencia en las relaciones de pareja, en los contextos histórico, sociocultural, político y económico de la ciudad de Medellín, en la primera década del siglo XXI. El desarrollo metodológic...

  19. Educación inclusiva para personas con discapacidad en la provincia de Buenos Aires : un estudio de caso a partir de las representaciones sociales de los actores educativos de la Escuela Santa Julia en Tigre, 2015.

    OpenAIRE

    Vélez Pachón, Valentina

    2016-01-01

    El presente trabajo tiene por objeto comprender e interpretar las representaciones sociales que frente a la educación inclusiva para personas con discapacidad tienen los actores educativos del nivel primario de la Escuela Santa Julia1. Creemos importante que sean rescatadas, en cuanto son estas miradas las que deberían aportar en la definición, formulación e implementación de una política pública que no prescinde de las propias percepciones, valoraciones y actitudes de las personas intervinie...

  20. Cartografía de la frontera bárbara”: las representaciones del Darién a propósito del conflicto entre el Virreinato de Nueva Granada y los Cunas

    OpenAIRE

    Nelson Eduardo Rodríguez Hernández

    2014-01-01

    El objetivo de este artículo es analizar las representaciones cartográficas del Darién producidas por los ingenieros militares enviados entre 1760 y 1788. Pretende exponer su relevancia para atender al conflicto entre los indígenas cuna y el Virreinato de la Nueva Granada durante la segunda mitad del Siglo XVIII. La región del Darién era vital para el control administrativo en la América Española, por su ubicación estratégica y la abundancia de recursos, pero la preeminencia de indígenas no s...

  1. Cartografía de la frontera bárbara": las representaciones del Darién a propósito del conflicto entre el Virreinato de Nueva Granada y los Cunas

    OpenAIRE

    Rodríguez Hernández, Nelson Eduardo

    2014-01-01

    El objetivo de este artículo es analizar las representaciones cartográficas del Darién producidas por los ingenieros militares enviados entre 1760 y 1788. Pretende exponer su relevancia para atender al conflicto entre los indígenas cuna y el Virreinato de la Nueva Granada durante la segunda mitad del Siglo XVIII. La región del Darién era vital para el control administrativo en la América Española, por su ubicación estratégica y la abundancia de recursos, pero la preeminencia de indígenas no s...

  2. Representaciones sociales e imaginarios en torno a la escuela, la recreación, el tiempo libre y el ocio en tres escuelas de la ciudad de Bogotá

    Directory of Open Access Journals (Sweden)

    Juan Manuel Carreño Cardozo

    2012-12-01

    Full Text Available Este escrito presenta el informe de resultados de la primera etapa del proyecto de investigación Pedagogía y metodología de la recreación en la escuela, la cual se centra en analizar los imaginarios de los estudiantes y las representaciones sociales de los maestros de tres instituciones escolares de la ciudad de Bogotá, sobre las categorías de escuela, recreación, ocio y tiempo libre.

  3. Las netbooks en el hogar: análisis de las representaciones y prácticas que realizan los estudiantes y sus familias sobre las netbooks del Programa Conectar Igualdad

    OpenAIRE

    Módena, Lucía

    2013-01-01

    El objetivo principal de la investigación fue analizar las representaciones y prácticas sociales que un grupo de estudiantes y sus familias construyeron sobre las netbooks del Programa Conectar Igualdad para dar cuenta de la producción de sentidos que hacían sobre las Tecnologías de la Información y la Comunicación (TICs) y sobre esta política pública. Para ello fue fundamental identificar las experiencias de las familias, sus percepciones y sus trayectorias de uso de las TICs en relación a l...

  4. Mujeres gestantes, madres en gestación. Representaciones, modelos y experiencias en el tránsito a la maternidad de las mujeres vascas contemporáneas

    OpenAIRE

    Imaz Martínez, Elixabete

    2014-01-01

    475 p. El estudio aborda el tránsito a la maternidad de las mujeres que van a ser madres por primera vez, abarcando el período que comprende la gestación y primeros meses del bebé y observando tanto los aspectos sociosimbólicos "complejos de valores, simbólicos, de representaciones- como socioestructurales " posiciones en estructuras objetivas y relaciones que se establecen desde ellas-, aspectos que se muestran como necesariamente complementarios. La maternidad, la forma en que las socied...

  5. Rescatando el autocuidado de la salud durante el embarazo, el parto y al recién nacido: representaciones sociales de mujeres de una comunidad nativa en Perú

    OpenAIRE

    Chávez Alvarez,Rocío Elizabeth; Arcaya Moncada,Maria Josefa; Garcia Arias,Gladys; Surca Rojas,Teresa Catalina; Infante Contreras,Maria Virginia

    2007-01-01

    Este estudio cualitativo tuvo el objetivo de conocer el autocuidado tradicional de mujeres nativas durante el embarazo, el parto y al recién nacido. Fueron efectuadas 16 entrevistas parcialmente estructuradas a madres y parteras de una comunidad nativa peruana. Con el soporte de la teoría de las representaciones sociales y el método etnográfico, emergieron tres categorías temáticas: los símbolos y prácticas tradicionales representadas al cuidarse, preparan a la gestante para un pa...

  6. Buscando un padre : un estudio psicoanalítico en perspectiva freudiana de las representaciones paternas en "Todas las sangres" de José María Arguedas

    OpenAIRE

    Rivadeneira Cockburn, José Carlos

    2015-01-01

    Este es un estudio, desde el pensamiento freudiano, de las representaciones paternas en Todas las Sangres. En él señalamos los límites de algunas concepciones freudianas en su capacidad para dar cuenta de la complejidad de los fenómenos que analizamos en una sociedad fragmentada y violenta como la de Todas las Sangres, y en la que se dibuja una alternativa en términos utópicos. “Utopía”,- concepto no freudiano -, es el proyecto histórico y la dinámica integradora que se dibuja en aquella soc...

  7. Sexual-i-hablando, las representaciones sociales de las estudiantes de Educación Preescolar en relación con la Educación para la Sexualidad

    OpenAIRE

    Martha Sánchez-López

    2008-01-01

    Recibido 22 de noviembre 2006 • Aprobado 14 de marzo 2007       La presente investigación aborda las representaciones que tienen las estudiantes de la carrera de Educación Preescolar de la División de Educación Básica (DEB), sobre el curso Educación para la Sexualidad, impartido en el IV nivel del Bachillerato, a partir de la información que tienen las estudiantes sobre la sexualidad y de las expectativas respecto a su práctica profesional en las aulas preescolares sobre la ed...

  8. La miseria de la literatura: el mal en las representaciones de los escritores de La literatura nazi en América, Estrella distante y la no ficción de Roberto Bolaño

    OpenAIRE

    Villacreses Benavides, Norman Xavier

    2016-01-01

    La obra y la figura como escritor de Roberto Bolaño es uno de los espacios de investigación de los estudios literarios más importantes en la actualidad. Esto se debe tanto a la repercusión de su ficción dentro de la narrativa hispanoamericana contemporánea como a sus posiciones frente al ejercicio de la literatura. Esta investigación se ha propuesto hallar de qué forma se generan las representaciones del mal dentro del universo literario de Bolaño y cuál es su funcionamiento, tomando como ele...

  9. Conjugando el enfoque de las representaciones sociales y los aportes del campo ciencia, tecnología y sociedad para la comprensión de la investigación académica

    OpenAIRE

    López, María Paz; Piñero, Fernando Julio

    2012-01-01

    El estudio de las Representaciones Sociales (en adelante RS), desde su presentación en el campo de la Psicología Social de la mano de Moscovici (1961), ha tenido un amplio desarrollo dentro de las Ciencias Sociales. Esto se explica por la emergencia de diversas formas de abordaje y apropiación de los contenidos teóricos de las RS, en relación con los distintos objetivos y objetos de las investigaciones emprendidas así como también con la riqueza y complejidad de las propuestas teórico-metodol...

  10. A mono isocentric radiotherapy technique for craniospinal irradiation using asymmetric jaws

    International Nuclear Information System (INIS)

    Isin, G; Oezyar, E.; Guerdalli, S.; Arslan, G.; Uzal, D.; Atahan, I. L.

    1995-01-01

    Dose distribution across the junction of matching of craniospinal fields (lateral cranial fields and posterior spinal field) is important as severe complications may result if the beams overlap or disease may recurs if the gapping is too conservative. Various techniques have been used to achieve an effective transverse plane match and half-beam block technique is one of these techniques. Here, we describe a mono isocentric technique for the treatment of craniospinal fields using the asymmetric jaws of our linear accelerator (Philips SL-25). Before the clinical application of this non-standard technique, basic dosimetry parameters are evaluated. Asymmetric collimator dose distributions for various asymmetric field sizes were obtained and compared with symmetric dose distributions for 6 MV x-ray. A computerized 3-D water phantom with a pair of ionization chambers (reference and field) was used for dose profiles, isodose distributions and Percentage Depth Dose (PDD) for various asymmetric field sizes and different off axis distances. The measured values of off axis ratios for the interested depths were used in MU calculations. This new mono isocentric technique provides an ideal dose distribution at match-line as there is no need to move the patient during treatment. Use of heavy secondary cerrobend blocks (beam splitters) is eliminated. This technique provides the ease of consequent daily set-up's and fulfills the requirements for a conformal radiotherapy

  11. Enhanced cooling in mono-crystalline ultra-thin silicon by embedded micro-air channels

    Directory of Open Access Journals (Sweden)

    Mohamed T. Ghoneim

    2015-12-01

    Full Text Available In today’s digital world, complementary metal oxide semiconductor (CMOS technology enabled scaling of bulk mono-crystalline silicon (100 based electronics has resulted in their higher performance but with increased dynamic and off-state power consumption. Such trade-off has caused excessive heat generation which eventually drains the charge of battery in portable devices. The traditional solution utilizing off-chip fans and heat sinks used for heat management make the whole system bulky and less mobile. Here we show, an enhanced cooling phenomenon in ultra-thin (>10 μm mono-crystalline (100 silicon (detached from bulk substrate by utilizing deterministic pattern of porous network of vertical “through silicon” micro-air channels that offer remarkable heat and weight management for ultra-mobile electronics, in a cost effective way with 20× reduction in substrate weight and a 12% lower maximum temperature at sustained loads. We also show the effectiveness of this event in functional MOS field effect transistors (MOSFETs with high-κ/metal gate stacks.

  12. Mono-carboxylate conversion coatings for AZ31 Mg alloy protection

    Energy Technology Data Exchange (ETDEWEB)

    Frignani, A.; Grassi, V.; Zucchi, F.; Zanotto, F. [Corrosion Study Centre A. Dacco, University of Ferrara (Italy)

    2011-11-15

    Conversion coatings on a magnesium alloy were obtained by dipping AZ31 specimens in aqueous solutions of sodium salts of mono-carboxylic acids (stearic, palmitic, myristic, lauric, mono-carboxylate ion concentration from 1 to 5 mM, depending on the salt solubility) for 24 and 72 h at room temperature, or 24 h at 50 C. The influence exerted by the treatment time, bath temperature and alkyl chain length on the efficiency of these coatings was studied. The performances of the coatings were evaluated by potentiodynamic polarization curve recording after 1 h immersion in 0.05 M Na{sub 2}SO{sub 4} solution, while their temporal evolution was monitored by electrochemical impedance spectroscopy (EIS) spectra during 24 h. Further and long lasting tests were carried out also in 0.1 M NaCl solution. The efficiency of the coatings depended on the aliphatic chain length, and increased as the treatment time and the bath temperature were increased. The coating of lower homologue only hindered the cathodic process, while those of the higher homologues markedly inhibited the anodic process too. The best performances were displayed by 24 h-50 C stearic conversion coating, which maintained a very high efficiency for over 800 h immersion in 0.05 M sulphate solution. (Copyright copyright 2011 WILEY-VCH Verlag GmbH and Co. KGaA, Weinheim)

  13. The MONOS memory transistor: application in a radiation-hard nonvolatile RAM

    International Nuclear Information System (INIS)

    Brown, W.D.

    1985-01-01

    The MONOS (metal-oxide-nitride-oxide-silicon) device is a prime candidate for use as the nonvolatile memory element in a radiation-hardened RAM (random-access memory). The endurance, retention and radiation properties of MONOS memory transistors have been studied as a function of post nitride deposition annealing. Following the nitride layer deposition, all devices were subjected to an 800 0 C oxidation step and some were then annealed at 900 0 C in nitrogen. The nitrogen anneal produces an increase in memory window size of approximately 40%. The memory window center of the annealed devices is shifted toward more positive voltages and is more stable with endurance cycling. Endurance cycling to 10 9 cycles produces a 20% increase in memory window size and a 60% increase in decay rate. For a radiation total dose of 10 6 rads (Si), the memory window size is essentially unchanged and the decay rate increases approximately 13%. A combination of 10 9 cycles and 10 6 rads (Si) reduces the decades of retention (in sec) from 6.3 to 4.3 for a +- 23-V 16-μsec write/erase pulse. (author)

  14. [Synthesis and biological activity of 2,3-secotriterpene acid mono- and diamides].

    Science.gov (United States)

    Tolmacheva, I A; Igosheva, E V; Vikharev, Iu B; Grishko, V V; Savinova, O V; Boreko, E I; Eremin, V F

    2013-01-01

    Four types of amide (C3; C28; C3-C28) conjugates based on 2,3-seco-18alphaH-oleanane and 2,3-secolupane mono- and dicarboxylic acids were synthesized. The range of diamide derivatives was supplemented with C3-C3' and C28-C28' dicondensed amides with two A-secotriterpene backbones educed by reacting monocarboxylic A-secoacids with biogenic amino acid lysine. Compounds with inhibitory action against herpes virus reproduction (EC50 8.7 and 4.1 McM) were found among the synthesized mono- and diamide derivatives containing an ethyl-beta-alaninate fragment. It has been ascertained that diamide with ethyl-beta-alaninate fragment combines anti-herpes virus properties and anti-HIV activity (EC50 5.1 McM). For active compounds, the maximum non-toxic concentration (MNTC)/EC50 ratios ranges from 9.7 to 40.8. The synthesized amide conjugates do not exhibit any marked cytotoxic effects against human tumor cell lines rabdomiosarcoma RD TE32, A549 lung carcinoma and melanoma MS.

  15. Radiation degradation and hemolytic toxicity evaluation of mono azo reactive dyes

    International Nuclear Information System (INIS)

    Saeed, Q.U.; Bhatti, I.A.; Ashraf, A.

    2017-01-01

    Monoazo reactive dyes have been synthesized and subjected to degradation before their application. Advanced oxidation process has been recognized as a promising radiation technology for the remediation of hazardous organic compounds. Radiation induced degradation of two mono azo reactive dyes have been tried at different absorbed dose, 5 kGy,10 kGy and 15 kGy. Aqueous solutions of these dyes were treated with gamma radiation using Cs 137 radiation source at Nuclear Institute of Agriculture and Biology (NIAB) Faisalabad. Dyes were evaluated spectrophotometrically by UV-visible and fourier transform infra red (FT-IR) spectroscopic techniques before and after irradiation to analyse their percentage decolorization and degradation. Maximum percentage decolorization of 93% and 63% was achieved for mono azo dyes D1 and D2 at 15 kGy absorbed dose. Toxicity study of these dyes was also tested by haemolytic activity assay. Percentage haemolytic activity of untreated dyes was found within permissible limit showing non toxicity of dye solutions. (author)

  16. Aspirin mono-therapy continuation does not result in more bleeding after knee arthroplasty.

    Science.gov (United States)

    Schwab, Pierre-Emmanuel; Lavand'homme, Patricia; Yombi, JeanCyr; Thienpont, Emmanuel

    2017-08-01

    Current clinical practice guidelines sometimes still recommend stopping aspirin five to seven days before knee arthroplasty surgery. Literature regarding multimodal blood management and continuation of anti-platelet therapy in this type of surgery is scant. The study hypothesis was that knee arthroplasty under low-dose aspirin mono-therapy continuation does not cause more total blood loss than knee arthroplasty performed without aspirin. Blood loss would be measured by haemoglobin (Hb) and haematocrit (HTC) levels drop at day 2 or day 4 for patients who benefit from multimodal bleeding control measures. A database of all patients undergoing knee arthroplasty between 2006 and 2014 was analysed. Demographic, surgical and complete blood workup data were collected. A retrospective comparison study analysed both groups in terms of blood loss, by mean calculated blood loss as haemoglobin or haematocrit drop between the preoperative Nadir value and the postoperative day 2 and 4 value. A group of 198 (44 UKA and 154 TKA) patients underwent surgery without interrupting their aspirin therapy for cardiovascular prevention. Mean (SD) age was 71 (8) and the mean (SD) BMI was 29 (5.5) kg/m 2 . The control group consisted of 403 (102 UKA and 301 TKA) patients who were not under aspirin, or any other anti-platelet agent. Mean (SD) age was 65 (10) (p aspirin mono-therapy for cardiovascular prevention. III.

  17. Synthesis and Anti-Proliferative Effects of Mono- and Bis-Purinomimetics Targeting Kinases

    Directory of Open Access Journals (Sweden)

    Andrea Bistrović

    2017-11-01

    Full Text Available A series of mono-pyrrolo[2,3-d]pyrimidines 4a–4k, unsymmetrical bis-purine isosteres 5a–5e and symmetrical bis-pyrrolo[2,3-d]pyrimidines 6a and 6b connected via di(1,2,3-triazolylphenyl linker were synthesized by click chemistry. Whereas mono- 4g and bis-pseudopurine 5e showed selective inhibitory activities on cervical carcinoma (HeLa cells, bis-pyrrolo[2,3-d]pyrimidine 6b exhibited potent and selective anti-proliferative effect in the nanomolar range on pancreatic carcinoma (CFPAC-1 cells. Among these, compound 6b induced a significant reduction in the expression level of CDK9 (cyclin-dependent kinase 9/cyclin T1 in CFPAC-1 cells concomitant with attenuation of proliferative signaling mediated by c-Raf (rapidly accelerated fibrosarcoma and p38 MAP (mitogen-activated protein kinases. Our findings encourage further development of novel structurally related analog of 6b to obtain more selective anticancer agent for treating pancreatic cancer.

  18. Rapid identification of vibrio-cholerae O1 by coaglutination test using mono-specifis antibody

    Directory of Open Access Journals (Sweden)

    Bazargan SA

    1996-07-01

    Full Text Available In our investigation, rabbit hyper-immune serum to V.cholerae ogawa was absorbed with V.cholerae inaba whole-cells and vice versa. Applying ammonium sulphate precipitation method, mono-specific g globulins were purified and concentrated from the absorbed whole serum. These antibodies were fixed on staphylococcus cowan 1 NCTC-8325 whole-cells, using different chemical fixatives. It was observed that maximum fixation of g globulin to protein-A was achieved by 1-propanol 50% at 3 hours, which revealed through single radial immuno-diffusion techniqe. The rectal swab samples were cultured in an enrichment bile-peptons broth. After 5 hours 37°C while agitations, one drop of each sample was mixed with one drop of vibrio-cholerae bivalent mono-specific coagglutination reagent (VBCR. The results were read after 2 to 3 minutes. Finally though statistical analysis sensitivity and specificity of coagglutination test were calculated to be 95.1% and 99.2% respectively, when compared to positive & negative controls and conventional culture methods. Using VBCR, coagglutination test can be therefore considered as a simple, reliable and rapid method to detect V.cholerae O1 in the stool of patients in endemic area and less equipped laboratories

  19. Facile Synthesis of Mono-Dispersed Polystyrene (PS/Ag Composite Microspheres via Modified Chemical Reduction

    Directory of Open Access Journals (Sweden)

    Wen Zhu

    2013-12-01

    Full Text Available A modified method based on in situ chemical reduction was developed to prepare mono-dispersed polystyrene/silver (PS/Ag composite microspheres. In this approach; mono-dispersed PS microspheres were synthesized through dispersion polymerization using poly-vinylpyrrolidone (PVP as a dispersant at first. Then, poly-dopamine (PDA was fabricated to functionally modify the surfaces of PS microspheres. With the addition of [Ag(NH32]+ to the PS dispersion, [Ag(NH32]+ complex ions were absorbed and reduced to silver nanoparticles on the surfaces of PS-PDA microspheres to form PS/Ag composite microspheres. PVP acted both as a solvent of the metallic precursor and as a reducing agent. PDA also acted both as a chemical protocol to immobilize the silver nanoparticles at the PS surface and as a reducing agent. Therefore, no additional reducing agents were needed. The resulting composite microspheres were characterized by TEM, field emission scanning electron microscopy (FESEM, energy-dispersive X-ray spectroscopy (EDS, XRD, UV-Vis and surface-enhanced Raman spectroscopy (SERS. The results showed that Ag nanoparticles (NPs were homogeneously immobilized onto the PS microspheres’ surface in the presence of PDA and PVP. PS/Ag composite microspheres were well formed with a uniform and compact shell layer and were adjustable in terms of their optical property.

  20. N resource of grasses and N2-fixation of alfalfa in mono-culture and mixture

    International Nuclear Information System (INIS)

    Zhu Shuxiu

    1992-01-01

    The N behavior in alfalfa and gramineous forage grasses, tall fescue, siberian wild rye, wheat grass and awnless brome were studied in potting and pasture experiments in 1986-1988 by using 15 N isotope dilution technique. Comparison was made between the mixed culture and mono-culture. The % Ndff and %Ndfs of grasses were decreased by 14.19% and 20.76% respectively, while %Ndfa of alfalfa was increased by 20.22% in mixed culture as compared with mono-culture. The 15 N and soil N uptake data revealed that this enhancement was largely due to a lower competitive ability for soil N by alfalfa than by grass in mixed stands, causing the alfalfa to depend more on atmospheric N 2 fixation. 20.62%of N of grasses in mixed culture was from the N 2 -fixation by alfalfa, causing N level in root-sphere of alfalfa decreasing, which was considered to be one of the reasons that %Ndfa increased in mixed culture. N transfer may be carried out by the decomposition of roots and nodules of alfalfa plants

  1. Production of D- and L-Lactic Acid by Mono- and Mixed Cultures of Lactobacillus sp.

    Directory of Open Access Journals (Sweden)

    Antonija Trontel

    2011-01-01

    Full Text Available Batch cultivation of monoculture of Lactobacillus sp. and two–strain mixed culture of Lactobacillus sp. and Lactobacillus amylovorus DSM 20531T was carried out with the aim of producing L-(+- and D-(–/L-(+-lactic acid to be implemented in poly(lactic acid polymer production. Metabolic capacity of two Lactobacillus strains to ferment different carbon sources (glucose, sucrose or soluble starch during cultivation in MRS medium at 40 °C, in a laboratory-scale stirred tank bioreactor was defined. Lactobacillus sp. showed similar affinity towards mono- and disaccharide substrates, which were homofermentatively converted mostly to L-(+-lactic acid. L. amylovorus DSM 20531T has been characterized as a D/L-lactate producer and it is capable of conducting simultaneous saccharification and fermentation. Due to the interaction of Lactobacillus sp. with L. amylovorus DSM 20531T, starch was hydrolysed and fermented to the mixture of L-(+- and D-(–-lactic acid. Modified Luedeking-Piret kinetics used for the description of substrate utilization, growth of mono- and mixed cultures and production of lactic acid stereoisomers showed good agreement with experimental data.

  2. Enhanced cooling in mono-crystalline ultra-thin silicon by embedded micro-air channels

    KAUST Repository

    Ghoneim, Mohamed T.; Fahad, Hossain M.; Hussain, Aftab M.; Rojas, Jhonathan Prieto; Sevilla, Galo T.; Alfaraj, Nasir; Lizardo, Ernesto B.; Hussain, Muhammad Mustafa

    2015-01-01

    In today’s digital world, complementary metal oxide semiconductor (CMOS) technology enabled scaling of bulk mono-crystalline silicon (100) based electronics has resulted in their higher performance but with increased dynamic and off-state power consumption. Such trade-off has caused excessive heat generation which eventually drains the charge of battery in portable devices. The traditional solution utilizing off-chip fans and heat sinks used for heat management make the whole system bulky and less mobile. Here we show, an enhanced cooling phenomenon in ultra-thin (>10 μm) mono-crystalline (100) silicon (detached from bulk substrate) by utilizing deterministic pattern of porous network of vertical “through silicon” micro-air channels that offer remarkable heat and weight management for ultra-mobile electronics, in a cost effective way with 20× reduction in substrate weight and a 12% lower maximum temperature at sustained loads. We also show the effectiveness of this event in functional MOS field effect transistors (MOSFETs) with high-κ/metal gate stacks.

  3. Mono- and di-n-butyl phosphates of some metals in spent nuclear fuel reprocessing

    Energy Technology Data Exchange (ETDEWEB)

    Solovkin, A.S.

    1982-01-01

    Results of investigations which have been carried out in the Soviet Union for the last 10 years on the determination of the composition, structure, conditions of the formation and solubility of mono- and di-n-butyl phosphates of metals (U/sup 6 +/, Pu/sup 4 +/, Pu/sup 3 +/, Th, Zr, Fe/sup 3 +/, Am, Al, rare-earth elements), which are important for the processes of irradiated nuclear fuel reprocessing, are presented. A conclusion is made that zirconium mono- and di-n-butyl phosphates are the least soluble in aqueous and organic solvents of all investigated compounds. FeA/sub 3/ and AmA/sub 3/ are weakly soluble in aqueous solutions. The other compounds are sufficiently soluble in moderately acidic aqueous solutions or in DBP and TBP with dilutents. The obtained results indicate at the similarity of zirconium and plutonium (4) chemical properties; thorium, in this respect, is not an analogue of plutonium (4). Possible structural formulas of the investigated compounds are considered.

  4. Enhanced cooling in mono-crystalline ultra-thin silicon by embedded micro-air channels

    KAUST Repository

    Ghoneim, Mohamed T.

    2015-12-11

    In today’s digital world, complementary metal oxide semiconductor (CMOS) technology enabled scaling of bulk mono-crystalline silicon (100) based electronics has resulted in their higher performance but with increased dynamic and off-state power consumption. Such trade-off has caused excessive heat generation which eventually drains the charge of battery in portable devices. The traditional solution utilizing off-chip fans and heat sinks used for heat management make the whole system bulky and less mobile. Here we show, an enhanced cooling phenomenon in ultra-thin (>10 μm) mono-crystalline (100) silicon (detached from bulk substrate) by utilizing deterministic pattern of porous network of vertical “through silicon” micro-air channels that offer remarkable heat and weight management for ultra-mobile electronics, in a cost effective way with 20× reduction in substrate weight and a 12% lower maximum temperature at sustained loads. We also show the effectiveness of this event in functional MOS field effect transistors (MOSFETs) with high-κ/metal gate stacks.

  5. Searches for Dark Matter via Mono-W Production in Inert Doublet Model at the LHC

    Science.gov (United States)

    Wan, Neng; Li, Niu; Zhang, Bo; Yang, Huan; Zhao, Min-Fu; Song, Mao; Li, Gang; Guo, Jian-You

    2018-05-01

    The Inert Doublet Model (IDM) is one of the many beyond Standard Model scenarios with an extended scalar sector, which provide a suitable dark matter particle candidate. Dark matter associated visible particle production at high energy colliders provides a unique way to determine the microscopic properties of the dark matter particle. In this paper, we investigate that the mono-W + missing transverse energy production at the Large Hadron Collider (LHC), where W boson decay to a lepton and a neutrino. We perform the analysis for the signal of mono-W production in the IDM and the Standard Model (SM) backgrounds, and the optimized criteria employing suitable cuts are chosen in kinematic variables to maximize signal significance. We also investigate the discovery potential in several benchmark scenarios at the 14 TeV LHC. When the light Z2 odd scalar higgs of mass is about 65 GeV, charged Higgs is in the mass range from 120 GeV to 250 GeV, it provides the best possibility with a signal significance of about 3σ at an integrated luminosity of about 3000 fb‑1. Supported by the National Natural Science Foundation of China under Grant Nos. 11205003, 11305001, 11575002, the Key Research Foundation of Education Ministry of Anhui Province of China under Grant Nos. KJ2017A032, KJ2016A749, KJ2013A260, and Natural Science Foundation of West Anhui University under Grant No. WXZR201614

  6. Valoraciones y representaciones que guían las acciones de los cuadros de dirección y gerencia en microempresas y empresas pymes

    Directory of Open Access Journals (Sweden)

    Olga Lucía Anzola Morales

    2008-07-01

    Full Text Available Las pymes como estructura económica han venido creciendo y dominando el panorama empresarial; de forma paralela el Estado colombiano, como estrategia de crecimiento económico, renovó y fortaleció los programas de apoyo orientados a estas empresas. En consecuencia, hacia ellas se encamina la labor de algunas instituciones y centros de investigación, que pretenden aportar conocimiento tendiente a garantizar su perdurabilidad y desarrollo. Los análisis de los esquemas de competitividad de estas empresas han demostrado que los problemas centrales que las aquejan están relacionados con las valoraciones y las representaciones y de quienes las lideran. Debido a esto, el Grupo de Investigación Culturas Corporativas y Perdurabilidad Organizacional estableció un sub-proyecto de investigación tendiente al conocimiento de estos elementos. Participaron en esta investigación de tipo exploratorio y de carácter descriptivo los gerentes de 49 empresas legalmente constituidas, con antigüedad igual o mayor a 5 años y catalogadas como micro o empresas pymes. Para la recolección de la información se utilizó una entrevista semi-estructurada con 8 categorías de análisis: actividades gremiales y formas de relación con otras empresas, relaciones con el Estado, prácticas e imágenes con relación a los trabajadores y sus procesos de organización, actitudes hacia la innovación técnica y administrativa, formas de relación intraempresarial, relación con el exterior, visión prospectiva y dinámica entre empresas y consumidores. El objetivo del presente documento es presentar los hallazgos relacionados exclusivamente con la primera categoría de análisis.

  7. Representaciones sociales en disputa: Los procesos de selección de trabajadoras del cuidado entre familias de clases medias en la ciudad de Buenos Aires

    Directory of Open Access Journals (Sweden)

    Débora Gorban

    2015-07-01

    Full Text Available En este artículo nos proponemos, analizar las diferentes prácticas de contratación de niñeras, y las lógicas y criterios que se despliegan en el proceso de selección de las mismas, entre familias de clases medias y medias altas de la Ciudad de Buenos Aires. Pero también nos centraremos en el análisis de estas lógicas y criterios a través de agencias de contratación de personal para el trabajo de cuidado. Esto nos permitirá completar la mirada de las empleadoras ya que allí se concentra un conjunto heterogéneo de demandas de niñeras y experiencias de trabajo. El análisis de las prácticas y lógicas asociadas a este momento puntual del comienzo de la relación laboral nos permitirá observar, por un lado cuales son las expectativas o lo que las familias esperan al momento de iniciar la contratación de una persona que se ocupe del cuidado de los niños y niñas pequeños/as, y al mismo tiempo los temores que dicha contratación suscita. Por otra parte nos permitirán dar cuenta de las representaciones existentes entre quienes contratan (familias de clase media y alta en su mayoría sobre quiénes pueden ser “cuidadoras”.

  8. La justicia de menores desde la mirada de los jueces. Valoraciones y representaciones sobre la ley y la administración de justicia

    Directory of Open Access Journals (Sweden)

    Silvia Guemureman

    2015-03-01

    Full Text Available El presente artículo condensa las opiniones y valoraciones que los jueces de menores tienen sobre algunos aspectos del quehacer judicial en la administración de justicia sobre  personas menores de edad. En la pretensión de construir una cartografía moral de las prácticas judiciales, realicé una reconstrucción de las mismas a través de los discursos hablados y escritos de los jueces. Realicé entrevistas en profundidad y un análisis cualitativo y lingüístico de sentencias. Así pude confrontar aquello que los que los jueces enuncian, y aquello que los jueces realizan en su labor de administración de justicia y dejan plasmado en las sentencias. También yo he reconstruido el discurso y el relato que los magistrados construyen sobre sus acciones. En este artículo me concentraré en los relatos de los jueces a través de la reconstrucción de sus opiniones en las entrevistas realizadas. El trabajo de campo se realizó en los Tribunales orales de menores de la Ciudad de Buenos Aires. La reconstrucción  se organizó en base a tres ejes: la percepción de los jueces sobre la delincuencia juvenil; la regulación legal sobre las personas menores de edad (Régimen penal de la minoridad/ley 22.278 y las representaciones de los jueces sobre el fin de la pena. He podido constatar que en las valoraciones de los jueces emergen cosmovisiones preexistentes sobre el bien, la moral, lo bueno, lo correcto y lo normal. Asimismo, los jueces albergan consensos valoradas positivamente. Estas cosmovisiones marcan pautas de distribución en torno a la norma.  

  9. REPRESENTACIONES SOCIALES DE AMBIENTE Y EDUCACIÓN AMBIENTAL EN EL C.E.D. LA CONCEPCIÓN (BOGOTA-COLOMBIA

    Directory of Open Access Journals (Sweden)

    Jenny Johanna Duarte Díaz

    2014-05-01

    Full Text Available En la actualidad en las instituciones educativas existe dificultad por construir prácticas relacionadas con temas ambientales, a consecuencia de que no hay suficiente claridad en la forma de diseñar e implementar propuestas, propiciando que lo abordado desde los proyectos ambientales no tenga el impacto esperado. Razón que genera la necesidad de iniciar procesos investigativos que establezcan coherencia en las posturas curriculares, políticas nacionales y los contextos escolares en los que está inmersa la educación ambiental.   Por lo cual, el presente estudio se planteó con el objetivo de identificar las representaciones sociales frente al ambiente y la educación ambiental que poseían algunos miembros de una institución educativa de carácter público en Bogotá. Con el fin de iniciar procesos formativos que lleven a trabajar la educación ambiental de manera interdisciplinar en la escuela desde miradas reflexivas, que nos permitan construir una visión global del ambiente.   Para lo cual se utilizó un enfoque metodológico cualitativo apoyado en la técnica de entrevistas y como instrumento el cuestionario.   Concluyendo que el grupo de participantes no presentan una única representación social de ambiente definiéndolo desde tres miradas: como el medio de vida, los recursos a utilizar y la naturaleza. Y la educación ambiental desde las visiones naturalista, conservacionista - recursista y humanista. Evidenciando la importancia de generar más que actividades puntuales, procesos formativos en educación ambiental que vinculen a los diversos sujetos de las comunidades educativas.

  10. Two coarse pyroclastic flow deposits, northern Mono-Inyo Craters, CA

    Science.gov (United States)

    Dennen, R. L.; Bursik, M. I.; Stokes, P. J.; Lagamba, M.; Fontanella, N.; Hintz, A. R.; Jayko, A. S.

    2010-12-01

    The ~1350 A.D., rhyolitic North Mono eruption, Mono-Inyo Craters, CA, included the extrusion and destruction of Panum Dome and associated clastic deposits. Overlying the tephras of the North Mono sequence, the Panum deposits include a block-and-ash flow (BAF) deposit, covering ~3.5 km2. Blocks within the deposit are typically lithic rhyolite and banded gray micro-vesicular glass, showing white, almost powdery marks ranging from circular to linear in shape. These marks are interpreted as friction marks resulting from collisions between clasts. The deposit also contains bread-crusted obsidians with pressed-in clasts as well as reticulite with a bread-crusted surface texture. Near the centerline of the deposit is a ridge-topping train of jigsaw fractured blocks, often with reddish-orange alteration. One house sized jigsaw block sits upstream of a long, thinning pile of reddish orange debris; this “flow shadow” indicates that the block remained relatively stationary while the block and ash flow continued to propagate around it. The bread-crusted reticulite is most common at proximal localities. It is proposed that the dome destruction included a debris avalanche emplacing the train of jigsaw fractured blocks and creating a topographic high, the block-and-ash flow (the farthest reaching deposit from this event) which flowed around the debris avalanche deposits, and a final “lateral expansion” of a magma foam, creating the reticulite seen concentrated at proximal locations. Another coarse pyroclastic flow (here termed the “lower blast deposit”) underlies the North Mono tephra. It is more obsidian rich and finer grained than the Panum BAF. The lower blast deposit may have originated from Pumice Pit vent, which is now capped with an older dome ~0.5 km southeast of Panum. The lower blast deposit extends farther from the Panum vent than does the Panum BAF deposit, and apparently was mistaken for the Panum BAF deposit by previous workers. Hence the run

  11. Isoniazid Mono-Resistant Tuberculosis: Impact on Treatment Outcome and Survival of Pulmonary Tuberculosis Patients in Southern Mexico 1995-2010.

    Science.gov (United States)

    Báez-Saldaña, Renata; Delgado-Sánchez, Guadalupe; García-García, Lourdes; Cruz-Hervert, Luis Pablo; Montesinos-Castillo, Marlene; Ferreyra-Reyes, Leticia; Bobadilla-Del-Valle, Miriam; Canizales-Quintero, Sergio; Ferreira-Guerrero, Elizabeth; Téllez-Vázquez, Norma; Montero-Campos, Rogelio; Yanes-Lane, Mercedes; Mongua-Rodriguez, Norma; Martínez-Gamboa, Rosa Areli; Sifuentes-Osornio, José; Ponce-de-León, Alfredo

    2016-01-01

    Isoniazid mono-resistance (IMR) is the most common form of mono-resistance; its world prevalence is estimated to range between 0.0 to 9.5% globally. There is no consensus on how these patients should be treated. To describe the impact of IMR tuberculosis (TB) on treatment outcome and survival among pulmonary TB patients treated under programmatic conditions in Orizaba, Veracruz, Mexico. We conducted a prospective cohort study of pulmonary TB patients in Southern Mexico. From 1995 to 2010 patients with acid-fast bacilli or culture proven Mycobacterium tuberculosis in sputum samples underwent epidemiological, clinical and microbiological evaluation. We included patients who harbored isoniazid mono-resistant (IMR) strains and patients with strains susceptible to isoniazid, rifampicin, ethambutol and streptomycin. All patients were treated following Mexican TB Program guidelines. We performed annual follow-up to ascertain treatment outcome, recurrence, relapse and mortality. Between 1995 and 2010 1,243 patients with pulmonary TB were recruited; 902/1,243 (72.57%) had drug susceptibility testing; 716 (79.38%) harbored pan-susceptible and 88 (9.75%) IMR strains. Having any contact with a person with TB (adjusted odds ratio (aOR)) 1.85, 95% Confidence interval (CI) 1.15-2.96) and homelessness (adjusted odds ratio (aOR) 2.76, 95% CI 1.08-6.99) were associated with IMR. IMR patients had a higher probability of failure (adjusted hazard ratio (HR) 12.35, 95% CI 3.38-45.15) and death due to TB among HIV negative patients (aHR 3.30. 95% CI 1.00-10.84). All the models were adjusted for socio-demographic and clinical variables. The results from our study provide evidence that the standardized treatment schedule with first line drugs in new and previously treated cases with pulmonary TB and IMR produces a high frequency of treatment failure and death due to tuberculosis. We recommend re-evaluating the optimal schedule for patients harboring IMR. It is necessary to strengthen

  12. Long-term thermophilic mono-digestion of rendering wastes and co-digestion with potato pulp

    International Nuclear Information System (INIS)

    Bayr, S.; Ojanperä, M.; Kaparaju, P.; Rintala, J.

    2014-01-01

    Highlights: • Rendering wastes’ mono-digestion and co-digestion with potato pulp were studied. • CSTR process with OLR of 1.5 kg VS/m 3 d, HRT of 50 d was unstable in mono-digestion. • Free NH 3 inhibited mono-digestion of rendering wastes. • CSTR process with OLR of 1.5 kg VS/m 3 d, HRT of 50 d was stable in co-digestion. • Co-digestion increased methane yield somewhat compared to mono-digestion. - Abstract: In this study, mono-digestion of rendering wastes and co-digestion of rendering wastes with potato pulp were studied for the first time in continuous stirred tank reactor (CSTR) experiments at 55 °C. Rendering wastes have high protein and lipid contents and are considered good substrates for methane production. However, accumulation of digestion intermediate products viz., volatile fatty acids (VFAs), long chain fatty acids (LCFAs) and ammonia nitrogen (NH 4 -N and/or free NH 3 ) can cause process imbalance during the digestion. Mono-digestion of rendering wastes at an organic loading rate (OLR) of 1.5 kg volatile solids (VS)/m 3 d and hydraulic retention time (HRT) of 50 d was unstable and resulted in methane yields of 450 dm 3 /kg VS fed . On the other hand, co-digestion of rendering wastes with potato pulp (60% wet weight, WW) at the same OLR and HRT improved the process stability and increased methane yields (500–680 dm 3 /kg VS fed ). Thus, it can be concluded that co-digestion of rendering wastes with potato pulp could improve the process stability and methane yields from these difficult to treat industrial waste materials

  13. Biofilm formation and disinfectant resistance of Salmonella sp. in mono- and dual-species with Pseudomonas aeruginosa.

    Science.gov (United States)

    Pang, X Y; Yang, Y S; Yuk, H G

    2017-09-01

    This study aimed to evaluate the biofilm formation and disinfectant resistance of Salmonella cells in mono- and dual-species biofilms with Pseudomonas aeruginosa, and to investigate the role of extracellular polymeric substances (EPS) in the protection of biofilms against disinfection treatment. The populations of Salmonella in mono- or dual-species biofilms with P. aeruginosa on stainless steel (SS) coupons were determined before and after exposure to commercial disinfectant, 50 μg ml -1 chlorine or 200 μg ml -1 Ecolab ® Whisper™ V (a blend of four effective quaternary ammonium compounds (QAC)). In addition, EPS amount from biofilms was quantified and biofilm structures were observed using scanning electron microscopy (SEM). Antagonistic interactions between Salmonella and P. aeruginosa resulted in lower planktonic population level of Salmonella, and lower density in dual-species biofilms compared to mono-species biofilms. The presence of P. aeruginosa significantly enhanced disinfectant resistance of S. Typhimurium and S. Enteritidis biofilm cells for 2 days, and led to an average of 50% increase in polysaccharides amount in dual-species biofilms than mono-species biofilms of Salmonella. Microscopy observation showed the presence of large microcolonies covered by EPS in dual-species biofilms but not in mono-species ones. The presence of P. aeruginosa in dual-species culture inhibited the growth of Salmonella cells in planktonic phase and in biofilms, but protected Salmonella cells in biofilms from disinfection treatment, by providing more production of EPS in dual-species biofilms than mono-species ones. This study provides insights into inter-species interaction, with regard to biofilm population dynamics and disinfectant resistance. Thus, a sanitation protocol should be designed considering the protective role of secondary species to pathogens in biofilms on SS surface which has been widely used at food surfaces and manufacturers. © 2017 The Society

  14. Long-term thermophilic mono-digestion of rendering wastes and co-digestion with potato pulp

    Energy Technology Data Exchange (ETDEWEB)

    Bayr, S., E-mail: suvi.bayr@jyu.fi; Ojanperä, M.; Kaparaju, P.; Rintala, J.

    2014-10-15

    Highlights: • Rendering wastes’ mono-digestion and co-digestion with potato pulp were studied. • CSTR process with OLR of 1.5 kg VS/m{sup 3} d, HRT of 50 d was unstable in mono-digestion. • Free NH{sub 3} inhibited mono-digestion of rendering wastes. • CSTR process with OLR of 1.5 kg VS/m{sup 3} d, HRT of 50 d was stable in co-digestion. • Co-digestion increased methane yield somewhat compared to mono-digestion. - Abstract: In this study, mono-digestion of rendering wastes and co-digestion of rendering wastes with potato pulp were studied for the first time in continuous stirred tank reactor (CSTR) experiments at 55 °C. Rendering wastes have high protein and lipid contents and are considered good substrates for methane production. However, accumulation of digestion intermediate products viz., volatile fatty acids (VFAs), long chain fatty acids (LCFAs) and ammonia nitrogen (NH{sub 4}-N and/or free NH{sub 3}) can cause process imbalance during the digestion. Mono-digestion of rendering wastes at an organic loading rate (OLR) of 1.5 kg volatile solids (VS)/m{sup 3} d and hydraulic retention time (HRT) of 50 d was unstable and resulted in methane yields of 450 dm{sup 3}/kg VS{sub fed}. On the other hand, co-digestion of rendering wastes with potato pulp (60% wet weight, WW) at the same OLR and HRT improved the process stability and increased methane yields (500–680 dm{sup 3}/kg VS{sub fed}). Thus, it can be concluded that co-digestion of rendering wastes with potato pulp could improve the process stability and methane yields from these difficult to treat industrial waste materials.

  15. PKD1 Mono-Allelic Knockout Is Sufficient to Trigger Renal Cystogenesis in a Mini-Pig Model

    OpenAIRE

    He, Jin; Li, Qiuyan; Fang, Suyun; Guo, Ying; Liu, Tongxin; Ye, Jianhua; Yu, Zhengquan; Zhang, Ran; Zhao, Yaofeng; Hu, Xiaoxiang; Bai, Xueyuan; Chen, Xiangmei; Li, Ning

    2015-01-01

    PKD1 and PKD2 mutations could lead to autosomal dominant polycystic kidney disease (ADPKD), which afflicts millions of people worldwide. Due to the marked differences in the lifespan, size, anatomy, and physiology from humans, rodent ADPKD models cannot fully mimic the disease. To obtain a large animal model that recapitulates the disease, we constructed a mini-pig model by mono-allelic knockout (KO) of PKD1 using zinc finger nuclease. The mono-allelic KO pigs had lower PKD1 expression than t...

  16. Synergistic extraction of Am(III) using HTTA and bi-functional (DHDECMP) and mono-functional (TBP) donors

    International Nuclear Information System (INIS)

    Pai, S.A.; Lohithakshan, K.V.; Mithapara, P.D.; Aggarwal, S.K.

    1999-01-01

    The equilibrium constant (log Ks) for the organic phase synergistic reaction for Am(III)-HTTA system with bi-functional neutral donor di-hexyl di-ethyl carbamoylmethyl phosphonate (DHDECMP) was found to be about two orders of magnitude higher than that of the mono-functional neutral donor (TBP) with comparable basicity values. This log Ks value along with a large positive entropy change with DHDECMP compared to that with TBP confirms that the neutral donors like DHDECMP behave as bi-functional, in sharp contrast to its mono-functional behaviour in Pu(VI). (author)

  17. Lake Level Changes in the Mono Basin During the Last Deglacial Period

    Science.gov (United States)

    Wang, X.; Ali, G.; Hemming, S. R.; Zimmerman, S. R. H.; Stine, S. W.; Hemming, G.

    2014-12-01

    Mono Basin, located in the southwestern corner of the US Great Basin, has long been known to have experienced large lake level changes, particularly during the last deglaciation. But until recently it was not possible to establish a reliable lake level time series. We discovered many visually clean, white, shiny, dense calcite samples in the basin, associated with tufa deposits from high terraces. Their low thorium, but high uranium contents allow precise and reproducible U/Th age determinations. A highly resolved history of a minimum lake level through the last deglaciation can therefore be inferred based on sample locations and their ages. We found that the lake level reached ~2030 m asl at ~20.4 ka, evidenced by calcite coatings on a tufa mound at the upper Wilson Creek. The lake then rose to ~2075 m by ~19.1 ka, shown by calcite cements on conglomerates from the Hansen Cut terrace. The lake climbed to at least ~2140 m at ~15.9 ka, indicated by beach calcites from the east Sierra slope. Such timing of the highest lake stand, occurring within Heinrich Stadial 1, is reinforced by U/Th dates on calcite coatings from widespread locations in the basin, including the Bodie Hills and Cowtrack Mountains. The lake then dropped rapidly to ~2075 m at ~14.5 ka. It stood near this height over the next ~300 years, evidenced by a few-centimeter thick, laminated calcite rims on the Goat Ranch tufa mounds. It subsequently plunged to ~2007 m at ~13.8 ka, indicated by calcite coatings from cemetery road tufa mounds. The lake level came back to ~2030 m at ~12.9 ka, as seen in upper Wilson Creek tufa mounds. The lake level had a few fluctuations within the Younger Dryas, and even shot up to ~2075 m at ~12.0 ka. It then fell to levels in accord with Holocene climatic conditions. Relative to the present lake level of ~1950 m, Mono Lake broadly stood high during Heinrich Stadial 1 and Younger Dryas, when the climate was extremely cold over the North Atlantic, and the Asian monsoon was

  18. Anaerobic halo- alkaliphilic bacterial community of athalassic, hypersaline Mono lake and Owens Lake in California

    Science.gov (United States)

    Pikuta, Elena V.; Detkova, Ekaterina N.; Bej, Asim K.; Marsic, Damien; Hoover, Richard B.

    2003-02-01

    The bacterial diversity of microbial extremophiles from the meromictic, hypersaline Mono Lake and a small evaporite pool in Owens Lake of California was studied. In spite of these regions had differing mineral background and different concentrations of NaCl in water they contain the same halo- alkaliphiles anaerobic bacterial community. Three new species of bacteria were detected in this community: primary anaerobe, dissipotrophic saccharolytic spirochete Spirochaeta americana strain AspG1T, primary anaerobe which is proteolytic Tindallia californiensis strain APOT, and secondary anaerobe, hydrogen using Desulfonatronum thiodismutans strain MLF1T, which is sulfate- reducer with chemo-litho-autotrophic metabolism. All of these bacteria are obligate alkaliphiles and dependent upon Na+ ions and CO32- ions in growth mediums. It is interesting that closest relationships for two of these species were isolates from samples of equatorial African soda Magadi lake: Spirochaeta americana AspG1T has 99.4% similarity on 16S rDNA- analyses with Spirochaeta alkalica Z- 7491T, and Tindallia californiensis APOT has 99.1% similarity with Tindallia magadiensis Z-7934T. But result of DNA-DNA- hybridization demonstrated less then 50% similarity between Spirochaeta americana AspG1T and Spirochaeta alkalica Z-7491T. Percent of homology between Tindallia californiensis APOT and Tindallia magadiensis Z-7934T is only 55%. The sulfate-reducer from the alkalic anaerobic community of Magadi lake Desulfonatronovibrio hydrogenovorans Z-7935T was phylogenetically distant from this sulfate-reducer in Mono lake, but genetically closer (99.7% similarity) to the sulfate-reducer, isolated from Central Asian alkalic lake Khadyn in Siberia Desulfonatronum lacustre Z-7951T. The study of key enzymes (hydrogenase and CO- hydrogenase) in Tindallia californiensis APOT and Desulfonatronum thiodismutans MLF1T showed the presence of high activity of both the enzymes in first and only hydrogenase in second

  19. Las representaciones sociales sobre la esterilización masculina. El punto de vista de los orientadores del servicio de vasectomía en la Clínica del Hombre, en Bogotá, Colombia

    Directory of Open Access Journals (Sweden)

    Mara Viveros

    1998-01-01

    Full Text Available Los oferentes del servicio de vasectomía en la Clínica del Hombre, en Bogotá, construyen sus representaciones sobre este método anticonceptivo con base en un discurso biomédico, en su interacción con el usuario y en sus propias experiencias de vida. En la oferta del servicio, los orientadores tienen el mayor contacto con los usuarios. Son los encargados de indagar los motivos para solicitar el servicio y dar información que permita tomar una decisión con tranquilidad y certeza. Adicionalmente, son quienes, de manera directa, filtran la demanda del servicio a partir de sus experiencias, conocimientos y destrezas. Esto, conforme a una permanente negociación que realizan entre los criterios institucionales (número y espaciamiento de los hijos, edad del cliente, estabilidad de la pareja y grado de seguridad en la decisión, y su percepción y valoración del usuario. Las representaciones de los orientadores estudiados sobre la toma de decisión de la vasectomía muestran que es presentada, por una parte, como un método fácil e inofensivo y, por otra, como una opción de planificación liberadora.

  20. Teachers' social representations on drug use in a secondary school Representaciones sociales según los profesores al respecto del uso de drogas en una escuela de educación básica Representações sociais de professores sobre o uso de drogas em uma escola de ensino básico

    Directory of Open Access Journals (Sweden)

    Jussara Gue Martini

    2008-08-01

    Full Text Available Increased concern regarding drug abuse among adolescents contributes to the elaboration of prevention programs at schools. This investigation aims to know teachers' social representations, regarding drug abuse, in a secondary school in Florianopolis, SC, Brazil. A total of 16 teachers of the 5th to 8th grades participated in the study. Data were collected through associations elaborated by teachers in response to the expression: drugs use/abuse. The teacher's representations are organized around a central concept - the vulnerable other: a needy adolescent, who becomes drugs user, highlighting the family, everyday coping, and the school's (invisibility in prevention actions, as factors related. The complexity of factors involving drugs production, distribution and its commercialization, demands the implementation of actions that go beyond the scopes of education and health. The elaboration of inter-sector prevention programs considering local characteristics is necessary.La preocupación con el abuso de drogas entre los jóvenes obliga a crear estrategias de prevención. El objetivo de esta investigación fue conocer representaciones sociales, según los profesores en una escuela secundaria de Florianópolis respecto al uso de drogas; participaron del estudio 16 profesores del 5º al 8º grado de educación secundaria. Las informaciones fueron obtenidas a través de redes de asociaciones, como una forma de respuesta a la expresión estímulo: USO/ABUSO DE DROGAS. Las representaciones mencionadas por los profesores fueron organizadas de acuerdo a un núcleo central -el otro vulnerable - un adolescente con necesidades que se vuelve usuario de drogas; fueron destacados como factores relacionados: la familia, los enfrentamientos en su vida y la poca participación de la escuela en actividades de prevención. La complejidad de los factores involucrados en la producción, distribución y comercialización de drogas exigen la implementación de acciones

  1. Mechanism of manganese (mono and di) telluride thin-film formation and properties

    Science.gov (United States)

    Sharma, Raj Kishore; Singh, Gurmeet; Shul, Yong Gun; Kim, Hansung

    2007-03-01

    Mechanistic studies on the electrocrystallization of manganese telluride (MnTe) thin film are reported using aqueous acidic solution containing MnSO 4 and TeO 2. Tartaric acid was used for the inhibition of hydrated manganese oxide anodic growth at counter electrode. A detailed study on the mechanistic aspect of electrochemical growth of MnTe using cyclic voltametry is carried out. Conditions for electrochemical growth of manganese mono and di telluride thin films have been reported using cyclic voltammetric scans for Mn 2+, Te 4+ and combined Mn 2+ and Te 4+. X-ray diffraction showed the formation of polycrystalline MnTe films with cubic, hexagonal and orthorhombic mixed phases. MnTe film morphology was studied using scanning electron microscope. Susceptibility and electrical characterization supports the anti-ferromagnetic behavior of the as-deposited MnTe thin film.

  2. Study of gamma propagation by using the ZEUS mono-kinetic code

    International Nuclear Information System (INIS)

    Vergnaud, Therese

    1969-10-01

    As studies of radiation protection often require the knowledge of heating due to capture gamma of thermal neutrons, the authors report an attempt of assessment of neutrons and γ propagation by using the same code (Zeus) which computes particle scattering by implementing a mono-kinetic Monte Carlo method. With this method, it is possible to study rather complex geometries and gamma source distributions directly obtained by a previous calculation of thermal neutrons. However, this method is not suitable for the study of energy degradation of gamma rays during their propagation. An approximate shock law is used to take shock-induced energy loss into account. This method is tested for different materials or media (either light like water and aluminium, or heavy like iron). Results are compared with those obtained by Goldstein with the method of moments. Results obtained by using Zeus are discussed: some of them appear to be over-estimated [fr

  3. Mono-domain YBa2Cu3Oy superconductor fabrics prepared by an infiltration process

    International Nuclear Information System (INIS)

    Sudhakar Reddy, E.; Noudem, J.G.; Tarka, M.; Schmitz, G.J.

    2000-01-01

    A novel process for the fabrication of a new form of YBa 2 Cu 3 O y (123) superconducting material, with the dimensions of a thick film and the microstructure of a melt-textured single-domain bulk is described. The process allows the fabrication of 123 as a self-supporting fabric or as a thick film on various substrate materials. The process, which is generic and economical, uses commercially available Y 2 O 3 fabrics as a precursor material. The Y 2 O 3 cloth is infiltrated with barium cuprates and copper oxides from a liquid-phase source, then converted into Y 2 BaCuO 5 (211) phase and eventually to 123. The nucleation and growth of the 123 phase is controlled by seeding the cloth with an oriented heterogeneous MgO or Nd123 seed. Interesting application areas for the new form of the 123 mono-domain fabric are discussed. (author)

  4. Derivation of the low Mach number diphasic system. Numerical simulation in mono-dimensional geometry

    International Nuclear Information System (INIS)

    Dellacherie, St.

    2004-01-01

    This work deals with the derivation of a diphasic low Mach number model obtained through a Mach number asymptotic expansion applied to the compressible diphasic Navier Stokes system, expansion which filters out the acoustic waves. This approach is inspired from the work of Andrew Majda giving the equations of low Mach number combustion for thin flame and for perfect gases. When the equations of state verify some thermodynamic hypothesis, we show that the low Mach number diphasic system predicts in a good way the dilatation or the compression of a bubble and has equilibrium convergence properties. Then, we propose an entropic and convergent Lagrangian scheme in mono-dimensional geometry when the fluids are perfect gases and we propose a first approach in Eulerian variables where the interface between the two fluids is captured with a level set technique. (author)

  5. Monojets and mono-photons from light higgsino pair production at LHC14

    CERN Document Server

    Baer, Howard; Tata, Xerxes

    2014-01-01

    Naturalness arguments imply the existence of higgsinos lighter than 200-300 GeV. However, because these higgsinos are nearly mass degenerate, they release very little visible energy in their decays, and signals from electroweak higgsino pair production typically remain buried under Standard Model backgrounds. Moreover, gluinos, squarks and winos may plausibly lie beyond the reach of the LHC14, so that signals from naturalness-inspired supersymmetric models may well remain hidden via conventional searches. We examine instead prospects for detecting higgsino pair production via monojets or mono-photons from initial state radiation. We find typical signal-to-background rates at best at the 1 % level, leading to rather pessimistic conclusions regarding detectability via these channels.

  6. Static and Ultrafast Transient Photophysics of Mono- and Dual-Branched Triarylamines

    International Nuclear Information System (INIS)

    Feng-Ming, Li; Wen-Ke, Feng; Shu-Feng, Wang; Qi-Huang, Gong; Fan-Shun, Meng; He, Tian

    2010-01-01

    Mono- and dual-branched molecules, {4-[2-(4-benzothiazol-2-yl-phenyl)-vinyl]-phenyl}-(4-methoxy-phenyl) -phenyl-amine (BS1) and bis-{4-[2-(4-benzothiazol-2-yl-phenyl)-vinyl]-phenyl}-(4-methoxy-phenyl) -phenyl-amine (BS2), are investigated with one- and two-photon static spectroscopy, and the femtosecond fluorescence up-conversion technique. The molecules show branch-based fluorescence emission at low quantum yield. Ultrafast non-radiative decay on a picosecond time scale is found and is attributed to intramolecular charge-transfer bridged by the central triphenylamine. The two-photon absorption cross-sections of BS1 and BS2 are 19.1 and 19.4 GM, respectively. (cross-disciplinary physics and related areas of science and technology)

  7. Synthesis of the mono- and di(4-(1,1,3,3-tetramethylbutyl)) phosphoric acids

    International Nuclear Information System (INIS)

    Elias, H.; Zaoui, A.; Attou, M.; Hadj Bachir, D.; Bouzidi, N.; Didi, M.

    1995-09-01

    This work is related to the synthesis of organophosphorus extracting agents used in purification of heavy metals such as uranium. The mono- and di (4-(1,1,3,3- tetramethylbutyl)) phenyl phosphoric acids, respectively MOPPA and DOPPA, are synthesizd by reaction of phosphorus pentoxid with 4(1,1,3,3-tetramethylbuthyl)) phenol. the separation of MOPPA from DOPPA is realised by liquid-liquid extraction. The Characterization, carried out by infrared uv-visible spectrophotometries, ph-metry and mass spectrometry, has confirmed the identity of the synthesized products. This study also showed that the products proportions are comporable to those of the homologous products obtained with 2-ethylbexanol in the same synthesis conditions

  8. Simulation study of accelerator based quasi-mono-energetic epithermal neutron beams for BNCT.

    Science.gov (United States)

    Adib, M; Habib, N; Bashter, I I; El-Mesiry, M S; Mansy, M S

    2016-01-01

    Filtered neutron techniques were applied to produce quasi-mono-energetic neutron beams in the energy range of 1.5-7.5 keV at the accelerator port using the generated neutron spectrum from a Li (p, n) Be reaction. A simulation study was performed to characterize the filter components and transmitted beam lines. The feature of the filtered beams is detailed in terms of optimal thickness of the primary and additive components. A computer code named "QMNB-AS" was developed to carry out the required calculations. The filtered neutron beams had high purity and intensity with low contamination from the accompanying thermal, fast neutrons and γ-rays. Copyright © 2015 Elsevier Ltd. All rights reserved.

  9. Mono- and Di-Alkylation Processes of DNA Bases by Nitrogen Mustard Mechlorethamine.

    Science.gov (United States)

    Larrañaga, Olatz; de Cózar, Abel; Cossío, Fernando P

    2017-12-06

    The reactivity of nitrogen mustard mechlorethamine (mec) with purine bases towards formation of mono- (G-mec and A-mec) and dialkylated (AA-mec, GG-mec and AG-mec) adducts has been studied using density functional theory (DFT). To gain a complete overview of DNA-alkylation processes, direct chloride substitution and formation through activated aziridinium species were considered as possible reaction paths for adduct formation. Our results confirm that DNA alkylation by mec occurs via aziridine intermediates instead of direct substitution. Consideration of explicit water molecules in conjunction with polarizable continuum model (PCM) was shown as an adequate computational method for a proper representation of the system. Moreover, Runge-Kutta numerical kinetic simulations including the possible bisadducts have been performed. These simulations predicted a product ratio of 83:17 of GG-mec and AG-mec diadducts, respectively. © 2017 Wiley-VCH Verlag GmbH & Co. KGaA, Weinheim.

  10. Transient heating and evaporation of moving mono-component liquid fuel droplets

    DEFF Research Database (Denmark)

    Yin, Chungen

    2016-01-01

    of which the flow and energy transport equations are numerically solved using the finite volume method. The computer code for the model is developed in a generic 3D framework and verified in different ways (e.g., by comparison against analytical solutions for simplified cases, and against experimental......This paper presents a complete description of a model for transient heating and evaporation of moving mono-component liquid fuel droplets. The model mainly consists of gas phase heat and mass transfer analysis, liquid phase analysis, and droplet dynamics analysis, which address the interaction...... between the moving droplets and free-stream flow, the flow and heat and mass transfer within the droplets, and the droplet dynamics and size, respectively. For the liquid phase analysis, the droplets are discretized into a number of control volumes along the radial, polar and azimuthal directions, on each...

  11. Endospores of B subtilis are pyrogenic and activate Mono Mac 6 cells

    DEFF Research Database (Denmark)

    Moesby, Lise; Hansen, Erik W; Christensen, Jens D

    2003-01-01

    interleukin-6. Lipopolysaccharides (LPS) dose-dependently induce interleukin-6 release, but the curve differs from that of LTA both in shape and offset. The interleukin-6 secretion induced by LPS, LTA and B. subtilis bacteria can be blocked by 73-85% by an antibody directed against CD14, whereas the antibody......The monocytic cell line Mono Mac 6 is sensitive to pyrogens and interleukin-6 secretion is induced after exposure to pyrogens. The aim of this study is to examine the pyrogenic activity and the interleukin-6-inducing capacity of the Gram-positive B. subtilis bacteria, endospores and isolated cell...... in a sandwich immunoassay. B. subtilis bacteria and endospores induce interleukin-6 in a dose-dependent manner. Endospores are less potent than bacteria. Lipoteichoic acid (LTA) isolated from B. subtilis induces interleukin-6 in a dose-dependent manner, whereas muramyl dipeptide (MDP) is unable to induce...

  12. Anomalous I-V curve for mono-atomic carbon chains

    International Nuclear Information System (INIS)

    Song Bo; Fang Haiping; Sanvito, Stefano

    2010-01-01

    The electronic transport properties of mono-atomic carbon chains were studied theoretically using a combination of density functional theory and the non-equilibrium Green's functions method. The I-V curves for the chains composed of an even number of atoms and attached to gold electrodes through sulfur exhibit two plateaus where the current becomes bias independent. In contrast, when the number of carbon atoms in the chain is odd, the electric current simply increases monotonically with bias. This peculiar behavior is attributed to dimerization of the chains, directly resulting from their one-dimensional nature. The finding is expected to be helpful in designing molecular devices, such as carbon-chain-based transistors and sensors, for nanoscale and biological applications.

  13. Crystalline mono- and multilayer self-assemblies of oligothiophenes at the air-water interface

    DEFF Research Database (Denmark)

    Isz, S.; Weissbuch, I.; Kjær, K.

    1997-01-01

    The formation of Langmuir monolayers at the air-water interface has long been believed to be limited to amphiphilic molecules containing a hydrophobic chain and a hydrophilic headgroup. Here we report the formation of crystalline mono- and multilayer self-assemblies of oligothiophenes, a class...... of aromatic nonamphiphilic molecules, self-aggregated at the air-water interface. As model systems we have examined the deposition of quaterthiophene (S-4), quinquethiophene (S-5). and sexithiophene (S-6) from chloroform solutions on the water surface. The structures of the films were determined by surface...... surface. S-5 self-ageregates at the water surface to form mixtures of monolayers and bilayers of the beta polymorph; S-6 forms primarily crystalline monolayers of both alpha and beta forms. The crystalline assemblies preserve their integrity during transfer from the water surface onto solid supports...

  14. Rola nagrań wideo w badaniu ontogenezy mowy w środowisku mono- i bilingwalnym

    Directory of Open Access Journals (Sweden)

    Anna Nallur

    2017-07-01

    Full Text Available The article presents the audio – video techniques that nowadays are the basic tools for the study of the child’s language development. These techniques could be used for mono and bilingual children. The author describes a “language biography” as one of the methods for the acquisition of language competence. According to W. Miodunka (2016, the “language biography” as a research method should include the following characteristics: openness, natural, and excellent communication. These features could be accomplished by using a camera during everyday activities. Additionally, the article presents the principles of recording videos for research purposes that could be valuable information for other studies. Thereafter, the author shows the technique to transcribe recordings based on the language development study of two bilingual and two monolingual children.

  15. Metabolism of UC-labelled urea in conventional, germ-free and mono-associated rats

    Energy Technology Data Exchange (ETDEWEB)

    Juhr, N.C.; Franke, J.

    1987-01-01

    This report deals with the utilization of UC-labelled urea in conventional, defined associated and germ-free rats. With conventional animals 71.44% of the administered UC dose can be demonstrated in the exhaled air, 0.47% in organs and 27.35% in the urine. 1.04% was found in the intestinal and fecal contents. Animals mono-associated with Proteus mirabilis have nearly the same utilization rate (59.15, 0.34, 35.98, 2% resp.). In germ-free animals 1.21% of the activity appeared in the exhaled air and showed a small part of non-enzymatic hydrolysis of urea. The excretion of 97.70% in the urine shows that urea is absorbed from the intestine in germ-free animals.

  16. Mitochondrial membranes with mono- and divalent salt: changes induced by salt ions on structure and dynamics

    DEFF Research Database (Denmark)

    Pöyry, Sanja; Róg, Tomasz; Karttunen, Mikko

    2009-01-01

    We employ atomistic simulations to consider how mono- (NaCl) and divalent (CaCl(2)) salt affects properties of inner and outer membranes of mitochondria. We find that the influence of salt on structural properties is rather minute, only weakly affecting lipid packing, conformational ordering......, and membrane electrostatic potential. The changes induced by salt are more prominent in dynamical properties related to ion binding and formation of ion-lipid complexes and lipid aggregates, as rotational diffusion of lipids is slowed down by ions, especially in the case of CaCl(2). In the same spirit, lateral...... diffusion of lipids is slowed down rather considerably for increasing concentration of CaCl(2). Both findings for dynamic properties can be traced to the binding of ions with lipid head groups and the related changes in interaction patterns in the headgroup region, where the binding of Na(+) and Ca(2+) ions...

  17. Imperfections and phase transformations by mono-N-alkylammonium-uranium glimmers

    International Nuclear Information System (INIS)

    Kammermeier, H.

    1982-01-01

    Uranium glimmers have a layered structure. Bimolecular intermediate layered films of parallel ordered alkyl chains can be produced by exchange of the intermediate layer kations with the mono-n-alkylammonium ions and the succession of soaking with n-alkanols. Phase changes can occur in these films that are accompanied by a change of the layer distance of the solid inorganic basic matrix. N-alkyl ammonium-n-alkanol-intercalcation compounds of uranium glimmers represent systems that can conveniently be examined with X-rays. Thermal phase changes can be performed easily. This paper describes how one can derive conclusions on the reaction mechanism of phase changes in bimolecular alkyl chain films by means of a profile analysis of X-ray reflexes. (orig./HBR) [de

  18. E. P. R. spectroscopic study of nitroxide mono- and bi-radicals

    International Nuclear Information System (INIS)

    Lemaire, H.

    1966-09-01

    A nitroxide is a molecule containing the group N-O where the oxygen atom made only one bond instead of the usual two. The main advantage of these radicals is their exceptional stability; this allows the study of well defined chemical structures while varying at will the experimental conditions. Studies by electron paramagnetic resonance of nitroxide mono-radicals have given the principal directions and the principal values of the electron-nitrogen nucleus hyperfine tensor and of the anisotropic g-factor tensor. The results were then related to the electronic structure of radicals. An understanding was obtained of the influence of the solvent on the principal values of the tensors, and the marked differences observed in the broadening of hyperfine lines when the medium become viscous. In the nitroxide biradicals, the hyperfine spectra depends not only on the magnetic interactions relative to each monomer, but also on the magnitude of the exchange interaction between the singlet and the triplet states of the dimer; the biradicals studied here are the first organic compounds which show clearly the influence of this exchange on the hyperfine structure. The two unpaired electrons also interact by a magnetic dipolar interaction: in the intermediate case, this can be used to derive the sign of the exchange interaction if the bi-radical is studied in a liquid crystal. Just as for mono-radicals, the hyperfine spectra of bi-radicals show selective broadening in viscous media, which is caused by an overall motional modulation of the anisotropic tensors. This gives another way to determine the sign of the exchange interaction. (author) [fr

  19. First-principles study on mono-vacancy self diffusion and recovery in tungsten crystal

    Energy Technology Data Exchange (ETDEWEB)

    Wen, Shu long [Key Laboratory of Advanced Technology of Materials (Ministry of Education), Superconductivity and New Energy R& D Ceter, Southwest JiaoTong University, Chengdu, Sichuan 610031 (China); Chen, Ji ming; Liu, Xiang [Fusion Science of Southwestern Institute of Physics, Chengdu, Sichuan 610041 (China); Zhu, Hao; Chang, Hong yan [Key Laboratory of Advanced Technology of Materials (Ministry of Education), Superconductivity and New Energy R& D Ceter, Southwest JiaoTong University, Chengdu, Sichuan 610031 (China); Huang, Zheng, E-mail: zhhuang@swjtu.edu.cn [Key Laboratory of Advanced Technology of Materials (Ministry of Education), Superconductivity and New Energy R& D Ceter, Southwest JiaoTong University, Chengdu, Sichuan 610031 (China); Pan, Min, E-mail: mpan@swjtu.edu.cn [Key Laboratory of Advanced Technology of Materials (Ministry of Education), Superconductivity and New Energy R& D Ceter, Southwest JiaoTong University, Chengdu, Sichuan 610031 (China); Western Superconducting Technologies Co., Ltd., Xi’an, Shanxi 710018 (China); Zhao, Yong [Key Laboratory of Advanced Technology of Materials (Ministry of Education), Superconductivity and New Energy R& D Ceter, Southwest JiaoTong University, Chengdu, Sichuan 610031 (China)

    2016-11-01

    Highlights: • The migration barrier energy E{sub m} of vacancy indicated that the optimum diffusion paths would exist in the diffusion process. • The Frenkel pair’s recovery had a close correlation with the “I–V” distance and within a range of 1.86–2.08 eV. • The self-recovery region has an ellipsoid profile with the semiminor axis of 2.7 Å and the semimajor axis of 5.5 Å. • The probability for the vacancy migration was closely assosiated with the E{sub m} and the working temperature. - Abstract: The point defects behavior becomes one of the most basic issues under the challenge of fusion environment. The recovery mechanisms of Frenkel pair defects and the self-diffusion coefficient of mono-vacancy in bulk bcc tungsten were researched by the first principle calculations. The calculation of migration energy curves for <111> SIAs indicated that the process of the Frenkel pair recovery had a close correlation with the “I–V” distance, and the migration barrier energies E{sub m} was within a limit range of 1.86–2.08 eV. It was found that the self-recovery region had an ellipsoid profile with the semiminor axis of 2.7 Å and the semimajor axis of 5.5 Å. The self-diffusion coefficients of the mono-vacancy were calculated and the results showed that the probability for the vacancy migration was not only associated with the E{sub m} but also the temperature being challenged.

  20. Analysis of Gas Membrane Ultra-High Purification of Small Quantities of Mono-Isotopic Silane

    Energy Technology Data Exchange (ETDEWEB)

    de Almeida, Valmor F [ORNL; Hart, Kevin J [ORNL

    2016-09-01

    A small quantity of high-value, crude, mono-isotopic silane is a prospective gas for a small-scale, high-recovery, ultra-high membrane purification process. This is an unusual application of gas membrane separation for which we provide a comprehensive analysis of a simple purification model. The goal is to develop direct analytic expressions for estimating the feasibility and efficiency of the method, and guide process design; this is only possible for binary mixtures of silane in the dilute limit which is a somewhat realistic case. Among the common impurities in crude silane, methane poses a special membrane separation challenge since it is chemically similar to silane. Other potential problematic surprises are: ethylene, diborane and ethane (in this order). Nevertheless, we demonstrate, theoretically, that a carefully designed membrane system may be able to purify mono-isotopic, crude silane to electronics-grade level in a reasonable amount of time and expenses. We advocate a combination of membrane materials that preferentially reject heavy impurities based on mobility selectivity, and light impurities based on solubility selectivity. We provide estimates for the purification of significant contaminants of interest. To improve the separation selectivity, it is advantageous to use a permeate chamber under vacuum, however this also requires greater control of in-leakage of impurities in the system. In this study, we suggest cellulose acetate and polydimethylsiloxane as examples of membrane materials on the basis of limited permeability data found in the open literature. We provide estimates on the membrane area needed and priming volume of the cell enclosure for fabrication purposes when using the suggested membrane materials. These estimates are largely theoretical in view of the absence of reliable experimental data for the permeability of silane. Last but not least, future extension of this work to the non-dilute limit may apply to the recovery of silane from

  1. Non-cirrhotic portal hypertension in HIV mono-infected patients.

    Science.gov (United States)

    Jackson, Belinda D; Doyle, Joseph S; Hoy, Jennifer F; Roberts, Stuart K; Colman, John; Hellard, Margaret E; Sasadeusz, Joseph J; Iser, David M

    2012-09-01

    Unexplained liver injury including fibrosis and portal hypertension has rarely been reported among patients with HIV in the absence of co-infection with hepatitis B (HBV) or hepatitis C (HCV). We describe a series of HIV mono-infected patients with evidence of non-cirrhotic portal hypertension. HIV-infected patients with evidence of portal hypertension who were anti-HBV and anti-HCV negative and HBV and HCV RNA polymerase chain reaction (PCR) negative were identified from patients managed by the Victorian statewide HIV referral service located at The Alfred Hospital, Melbourne. Portal hypertension was defined as either radiological or endoscopic evidence of varices, portal vein flow obstruction, or elevated hepatic venous pressure gradient (HPVG). Five patients were found to have portal hypertension. These patients were male, aged 41 to 65 years, with known duration of HIV infection between 11 to 25 years. All had been treated with antiretroviral therapy, including didanosine. Tests for metabolic, autoimmune, and hereditary causes of liver disease failed to establish an etiology for the liver injury. All had radiological or endoscopic findings of varices, and four patients had radiological features of portal vein obstruction or flow reversal. Only one patient underwent HPVG measurement, which was elevated. Non-invasive fibrosis assessment revealed increased liver stiffness in three (out of four) patients, and no cirrhotic features were found on those who underwent liver biopsy. To our knowledge, this is the largest published series of non-cirrhotic portal hypertension in HIV mono-infected patients in Australia. Further research is needed to understand what relationship, if any, HIV or its treatments might have on liver injury over time. © 2012 Journal of Gastroenterology and Hepatology Foundation and Blackwell Publishing Asia Pty Ltd.

  2. Nitrogen fixation dynamics of two diazotrophic communities in Mono Lake, California

    Science.gov (United States)

    Oremland, R.S.

    1990-01-01

    Two types of diazotrophic microbial communities were found in the littoral zone of alkaline hypersaline Mono Lake, California. One consisted of anaerobic bacteria inhabiting the flocculent surface layers of sediments. Nitrogen fixation (acetylene reduction) by flocculent surface layers occurred under anaerobic conditions, was not stimulated by light or by additions of organic substrates, and was inhibited by O2, nitrate, and ammonia. The second community consisted of a ball-shaped association of a filamentous chlorophyte (Ctenocladus circinnatus) with diazotrophic, nonheterocystous cyanobacteria, as well as anaerobic bacteria (Ctenocladus balls). Nitrogen fixation by Ctenocladus balls was usually, but not always, stimulated by light. Rates of anaerobic dark fixation equaled those in the light under air. Fixation in the light was stimulated by 3-(3,4-dichlorophenyl)-1,1-dimethylurea and by propanil [N-(3,4-dichlorophenyl)propanamide]. 3-(3,4-Dichlorophenyl)-1,1-dimethyl urea-elicited nitrogenase activity was inhibited by ammonia (96%) and nitrate (65%). Fixation was greatest when Ctenocladus balls were incubated anaerobically in the light with sulfide. Dark anaerobic fixation was not stimulated by organic substrates in short-term (4-h) incubations, but was in long-term (67-h) ones. Areal estimates of benthic N2 fixation were measured seasonally, using chambers. Highest rates (~29.3 ??mol of C2H4 m-2 h-1) occurred under normal diel regimens of light and dark. These estimates indicate that benthic N2 fixation has the potential to be a significant nitrogen source in Mono Lake.

  3. Prevalence and correlates of cigarette smoking among Chinese schizophrenia inpatients receiving antipsychotic mono-therapy.

    Directory of Open Access Journals (Sweden)

    Yan-Min Xu

    Full Text Available OBJECTIVE: To investigate the prevalence rate of cigarette smoking and its socio-demographic and clinical correlates in Chinese schizophrenia inpatients receiving antipsychotic mono-therapy. METHODS: This study was a cross-sectional, two-site, hospital-based survey. Four hundred and twenty-nine schizophrenia patients (male/female: 66.9% vs. 33.1% were consecutively recruited from psychosis inpatient wards of two large specialty psychiatric hospitals in mainland China. Patients were assessed using a cigarette smoking questionnaire, the Positive and Negative Symptom Scale, the Simpson Angus Scale, the Barnes Akathisia Rating Scale, and the Abnormal Involuntary Movement Scale. Socio-demographic and other clinical data were also collected. We calculated the prevalence of current smoking in our sample as well as its indirectly standardized prevalence ratio (ISPR using data from the 2010 Global Adult Tobacco Survey in China. RESULTS: The prevalence rate of current smoking was 40.6% in our sample, and 57.5% in males and 6.3% in females. The ISPRs of all patients, men and women were 1.11(95%CI: 0.95 ∼ 1.29, 1.07(95%CI = 0.91 ∼ 1.24 and 4.64(95% CI = 2.12 ∼ 8.82, respectively. The overall and male-specific prevalence of current smoking did not differ significantly between patients and the general population. In multiple logistic regression analysis, male sex, older age, poor marital status, alcohol use, use of first-generation antipsychotics, longer duration of illness, more frequent hospitalizations, and more severe negative symptoms were independently associated with current smoking. CONCLUSION: Male Chinese inpatients with schizophrenia who received a mono-therapy of antipsychotics were not more likely to smoke than the general population. Cigarette smoking is more common in schizophrenia patients with more severe illness.

  4. First-principles study on mono-vacancy self diffusion and recovery in tungsten crystal

    International Nuclear Information System (INIS)

    Wen, Shu long; Chen, Ji ming; Liu, Xiang; Zhu, Hao; Chang, Hong yan; Huang, Zheng; Pan, Min; Zhao, Yong

    2016-01-01

    Highlights: • The migration barrier energy E_m of vacancy indicated that the optimum diffusion paths would exist in the diffusion process. • The Frenkel pair’s recovery had a close correlation with the “I–V” distance and within a range of 1.86–2.08 eV. • The self-recovery region has an ellipsoid profile with the semiminor axis of 2.7 Å and the semimajor axis of 5.5 Å. • The probability for the vacancy migration was closely assosiated with the E_m and the working temperature. - Abstract: The point defects behavior becomes one of the most basic issues under the challenge of fusion environment. The recovery mechanisms of Frenkel pair defects and the self-diffusion coefficient of mono-vacancy in bulk bcc tungsten were researched by the first principle calculations. The calculation of migration energy curves for SIAs indicated that the process of the Frenkel pair recovery had a close correlation with the “I–V” distance, and the migration barrier energies E_m was within a limit range of 1.86–2.08 eV. It was found that the self-recovery region had an ellipsoid profile with the semiminor axis of 2.7 Å and the semimajor axis of 5.5 Å. The self-diffusion coefficients of the mono-vacancy were calculated and the results showed that the probability for the vacancy migration was not only associated with the E_m but also the temperature being challenged.

  5. Sedimentary and Volcanic Records of the Laschamp and Mono Lake Excursions from Australia and New Zealand

    Science.gov (United States)

    Ingham, E. M.; Roberts, A. P.; Turner, G. M.; Heslop, D.; Ronge, T.; Conway, C.; Leonard, G.; Townsend, D.; Tiedemann, R.; Lamy, F.; Calvert, A. T.

    2014-12-01

    Geomagnetic excursions are short-lived deviations of the geomagnetic field from the normal range of secular variation. Despite significant advances in geomagnetic excursion research over the past 20 years, fundamental questions remain concerning the typical duration and global morphology of excursional geomagnetic fields. To answer such questions, more high-resolution, chronologically well-constrained excursion records are required, particularly from the Southern Hemisphere. We present preliminary paleomagnetic records of the Laschamp (~41 ka) and Mono Lake (~35 ka) excursions from three marine sediment cores from the Bounty Trough, New Zealand margin, and complementary volcanic records of the Laschamp excursion from lavas of Mt Ruapehu, New Zealand. Relatively high sedimentation rates of 12 - 26 cm/kyr in the Bounty Trough during glacial periods allow identification of excursional field behavior at each of the studied core locations. Each core displays one or two excursional events, with rapid directional swings between stable normal polarity and reversed excursional directions, each associated with coincident relative paleointensity minima. These anomalous paleomagnetic directions are interpreted to represent the Laschamp and Mono Lake excursions, based on a combination of tephrochronology, radiocarbon dating, and cyclostratigraphy (defined from core-scanning X-ray fluorescence and magnetic susceptibility records). Beside these records, we present results from fourteen lava flows, on Mt Ruapehu, for which 40Ar-39Ar dating indicates ages of between 39 and 45 ka. The step heating 40Ar-39Ar experiments produced particularly flat age plateaus, with corresponding 2 s.d. errors mostly approaching 1 kyr. The youngest and oldest flows carry normal polarity magnetization, however six flows, dated between 41 and 43 ka, display transitional field characteristics. Three of these flows display a declination swing of around 180o, which coincides with a previously published

  6. Differences in Classification Between Mono- and Polytrauma and Low- and High-Energy Trauma Patients With an Ankle Fracture : A Retrospective Cohort Study

    NARCIS (Netherlands)

    Briet, Jan Paul; Houwert, Roderick Marijn; Smeeing, Diederik P J; Dijkgraaf, Marcel G. W.; Verleisdonk, Egbert Jan M M; Leenen, Luke P H; Hietbrink, Falco

    2017-01-01

    Although fracture type and treatment options for ankle fractures are well defined, the differences between mono- and polytrauma patients and low- and high-energy trauma have not been addressed. The aim of the present study was to compare the fracture type and trauma mechanism between mono- and

  7. Differences in Classification Between Mono- and Polytrauma and Low- and High-Energy Trauma Patients With an Ankle Fracture: A Retrospective Cohort Study

    NARCIS (Netherlands)

    Briet, Jan Paul; Houwert, Roderick Marijn; Smeeing, Diederik P. J.; Dijkgraaf, Marcel G. W.; Verleisdonk, Egbert Jan; Leenen, Luke P. H.; Hietbrink, Falco

    2017-01-01

    Although fracture type and treatment options for ankle fractures are well defined, the differences between mono- and polytrauma patients and low- and high-energy trauma have not been addressed. The aim of the present study was to compare the fracture type and trauma mechanism between mono- and

  8. 21 CFR 582.4101 - Diacetyl tartaric acid esters of mono- and diglycerides of edible fats or oils, or edible fat...

    Science.gov (United States)

    2010-04-01

    ... diglycerides of edible fats or oils, or edible fat-forming fatty acids. 582.4101 Section 582.4101 Food and... Diacetyl tartaric acid esters of mono- and diglycerides of edible fats or oils, or edible fat-forming fatty acids. (a) Product. Diacetyl tartaric acid esters of mono- and diglycerides of edible fats or oils, or...

  9. Reseña del libro "Prácticas de las bibliotecas universitarias argentinas : reflexiones críticas en el contexto de la comunicación académica y sus representaciones en la web" de M. Patalano

    Directory of Open Access Journals (Sweden)

    Susana Soto

    2013-11-01

    Full Text Available Reseña del libro "Prácticas de las bibliotecas universitarias argentinas : reflexiones críticas en el contexto de la comunicación académica y sus representaciones en la web" de Mercedes Patalano

  10. Pregnenolone co-treatment partially restores steroidogenesis, but does not prevent growth inhibition and increased atresia in mouse ovarian antral follicles treated with mono-hydroxy methoxychlor

    Energy Technology Data Exchange (ETDEWEB)

    Craig, Zelieann R., E-mail: zelieann@illinois.edu; Hannon, Patrick R., E-mail: phannon2@illinois.edu; Flaws, Jodi A., E-mail: jflaws@illinois.edu

    2013-11-01

    Mono-hydroxy methoxychlor (mono-OH MXC) is a metabolite of the pesticide, methoxychlor (MXC). Although MXC is known to decrease antral follicle numbers, and increase follicle death in rodents, not much is known about the ovarian effects of mono-OH MXC. Previous studies indicate that mono-OH MXC inhibits mouse antral follicle growth, increases follicle death, and inhibits steroidogenesis in vitro. Further, previous studies indicate that CYP11A1 expression and production of progesterone (P{sub 4}) may be the early targets of mono-OH MXC in the steroidogenic pathway. Thus, this study tested whether supplementing pregnenolone, the precursor of progesterone and the substrate for HSD3B, would prevent decreased steroidogenesis, inhibited follicle growth, and increased follicle atresia in mono-OH MXC-treated follicles. Mouse antral follicles were exposed to vehicle (dimethylsulfoxide), mono-OH MXC (10 μg/mL), pregnenolone (1 μg/mL), or mono-OH MXC and pregnenolone together for 96 h. Levels of P{sub 4}, androstenedione (A), testosterone (T), estrone (E{sub 1}), and 17β-estradiol (E{sub 2}) in media were determined, and follicles were processed for histological evaluation of atresia. Pregnenolone treatment alone stimulated production of all steroid hormones except E{sub 2}. Mono-OH MXC-treated follicles had decreased sex steroids, but when given pregnenolone, produced levels of P{sub 4}, A, T, and E{sub 1} that were comparable to those in vehicle-treated follicles. Pregnenolone treatment did not prevent growth inhibition and increased atresia in mono-OH MXC-treated follicles. Collectively, these data support the idea that the most upstream effect of mono-OH MXC on steroidogenesis is by reducing the availability of pregnenolone, and that adding pregnenolone may not be sufficient to prevent inhibited follicle growth and survival. - Highlights: • Mono-OH MXC inhibited antral follicle steroidogenesis, growth, and survival. • Pregnenolone partially restored steroidogenesis

  11. Pregnenolone co-treatment partially restores steroidogenesis, but does not prevent growth inhibition and increased atresia in mouse ovarian antral follicles treated with mono-hydroxy methoxychlor

    International Nuclear Information System (INIS)

    Craig, Zelieann R.; Hannon, Patrick R.; Flaws, Jodi A.

    2013-01-01

    Mono-hydroxy methoxychlor (mono-OH MXC) is a metabolite of the pesticide, methoxychlor (MXC). Although MXC is known to decrease antral follicle numbers, and increase follicle death in rodents, not much is known about the ovarian effects of mono-OH MXC. Previous studies indicate that mono-OH MXC inhibits mouse antral follicle growth, increases follicle death, and inhibits steroidogenesis in vitro. Further, previous studies indicate that CYP11A1 expression and production of progesterone (P 4 ) may be the early targets of mono-OH MXC in the steroidogenic pathway. Thus, this study tested whether supplementing pregnenolone, the precursor of progesterone and the substrate for HSD3B, would prevent decreased steroidogenesis, inhibited follicle growth, and increased follicle atresia in mono-OH MXC-treated follicles. Mouse antral follicles were exposed to vehicle (dimethylsulfoxide), mono-OH MXC (10 μg/mL), pregnenolone (1 μg/mL), or mono-OH MXC and pregnenolone together for 96 h. Levels of P 4 , androstenedione (A), testosterone (T), estrone (E 1 ), and 17β-estradiol (E 2 ) in media were determined, and follicles were processed for histological evaluation of atresia. Pregnenolone treatment alone stimulated production of all steroid hormones except E 2 . Mono-OH MXC-treated follicles had decreased sex steroids, but when given pregnenolone, produced levels of P 4 , A, T, and E 1 that were comparable to those in vehicle-treated follicles. Pregnenolone treatment did not prevent growth inhibition and increased atresia in mono-OH MXC-treated follicles. Collectively, these data support the idea that the most upstream effect of mono-OH MXC on steroidogenesis is by reducing the availability of pregnenolone, and that adding pregnenolone may not be sufficient to prevent inhibited follicle growth and survival. - Highlights: • Mono-OH MXC inhibited antral follicle steroidogenesis, growth, and survival. • Pregnenolone partially restored steroidogenesis in mono-OH MXC

  12. Self-construing in children with primary mono-symptomatic nocturnal enuresis--an investigation of three measures.

    Science.gov (United States)

    Robinson, Joanne C; Butler, Richard J; Holland, Philip; Doherty-Williams, Dianne

    2003-01-01

    This study aims to measure different aspects of self-construing in children with primary mono-symptomatic nocturnal enuresis. 25 children aged 7-14 years, with nocturnal enuresis were recruited from a paediatric outpatient's unit specialising in enuresis [mean age 10.6 [males], 9.39 [females

  13. On Hydrogen Bonding in the Intramolecularly Chelated Taitomers of Enolic Malondialdehyde and its Mono- and Dithio-Analogues

    DEFF Research Database (Denmark)

    Carlsen, Lars; Duus, Fritz

    1980-01-01

    The intramolecular hydrogen bondings in enolic malondialdehyde and it mono- and dithio-analogues have been evaluated by a semiempricial SCF–MO–CNDO method. The calculations predict that the hydrogen bonds play an important part in the stabilities of malondialdehyde and monothiomalondialdehyde...

  14. [Detection of fps tumor antigen with mono-specific anti-fps serum in tumors induced by acute transforming ALV].

    Science.gov (United States)

    Wang, Yixin; Chen, Hao; Zhao, Peng; Li, Jianliang; Cui, Zhizhong

    2013-03-04

    To prepare anti-fps mono-specific serum, and detect the fps antigen in tumors induced by acute transforming avian leukosis/sarcoma virus containing v-fps oncogene. Two part of v-fps gene was amplified by RT-PCR using the Fu-J viral RNA as the template. Mono-specific serum was prepared by immuning Kunming white mouse with both two recombinant infusion proteins expressed by the prokaryotic expression system. Indirect immunofluorescent assay was used to detect fps antigen in tumor tissue suspension cells and CEF infected by sarcoma supernatant. Immunohistochemical method was used to detect fps antigen in tumor tissue. The mouse mono-specific serum was specific as it had no cross reaction with classical ALV-J strains. The result reveals that the tumor tissue suspension cells, the CEF infected by sarcoma supernatant, and the slice immunohistochemistry of the sarcoma showed positive results. The anti-fps mono-specific serum was prepared, and the detection method was established, which laid the foundation for the study of viral biological characteristics and mechanism of tumourgenesis of acute transforming avian leukosis/sarcoma virus containing v-fps oncogene.

  15. Dynamics of polyelectrolyte adsorption and colloidal flocculation upon mixing studied using mono-dispersed polystyrene latex particles

    NARCIS (Netherlands)

    Feng, Lili; Cohen Stuart, Martien; Adachi, Yasuhisa

    2015-01-01

    The dynamic behavior of polyelectrolytes just after their encounter with the surface of bare colloidal particles is analyzed, using the flocculation properties of mono-dispersed polystyrene latex (PSL) particles. Applying a Standardized Colloid Mixing (SCM) approach, effects of ionic strength and

  16. The use of approximation formulae in calculations of acid-base equilibria-II: salts of mono- and diprotic acids.

    Science.gov (United States)

    Narasaki, H

    1980-02-01

    The pH of solutions of salts of mono- and diprotic acids is calculated by use of approximation formulae and the theoretically exact equations. The regions for useful application of the approximation formulae (error monoprotic acids, areas are symmetrically equal to those of the acids. For salts of diprotic acids the ranges generally depend on K(2)/K(1).

  17. Bis(trialkylsilyl) peroxides as alkylating agents in the copper-catalyzed selective mono-N-alkylation of primary amides.

    Science.gov (United States)

    Sakamoto, Ryu; Sakurai, Shunya; Maruoka, Keiji

    2017-06-13

    The copper-catalyzed selective mono-N-alkylation of primary amides with bis(trialkylsilyl) peroxides as alkylating agents was reported. The results of a mechanistic study suggest that this reaction should proceed via a free radical process that includes the generation of alkyl radicals from bis(trialkylsilyl) peroxides.

  18. An unusual mono-substituted Keggin anion-chain based 3D framework with 24-membered macrocycles as linker units

    International Nuclear Information System (INIS)

    Pang Haijun; Ma Huiyuan; Yu Yan; Yang Ming; Xun Ye; Liu Bo

    2012-01-01

    A new compound, [Cu I (H 2 O)(Hbpp) 2 ]⊂{[Cu I (bpp)] 2 [PW 11 Cu II O 39 ]} (1) (bpp=1,3-bis(4-pyridyl)propane), has been hydrothermally synthesized and structurally characterized by single crystal X-ray diffraction. In compound 1, the unusual –A–B–A–B– array mono-substituted Keggin anion-chains and 24-membered (Cubpp) 2 cation-macrocycles are linked together to form a (2, 4) connected 3D framework with channels of ca. 9.784×7.771 Å 2 along two directions, in which the [Cu(H 2 O)(Hbpp) 2 ] coordination fragments as guest components are trapped. The photocatalytic experiments of compound 1 were performed, which show a good catalytic activity of compound 1 for photodegradation of RhB. Furthermore, the IR, TGA and electrochemical properties of compound 1 were investigated. - Graphical abstract: An unusual example of mono-substituted Keggin anion-chain based hybrid compound that possesses a 3D structure has been synthesized, which offers a feasible route for synthesis of such compounds. Highlights: ► The first example of –A–B–A–B– array mono-substituted Keggin chain is observed. ► An unusual three dimensional structure based mono-substituted Keggin anion-chains. ► The photocatalysis and electrochemical properties of the title compound were studied.

  19. 21 CFR 582.4521 - Monosodium phosphate derivatives of mono- and diglycerides of edible fats or oils, or edible fat...

    Science.gov (United States)

    2010-04-01

    ... diglycerides of edible fats or oils, or edible fat-forming fatty acids. 582.4521 Section 582.4521 Food and... Monosodium phosphate derivatives of mono- and diglycerides of edible fats or oils, or edible fat-forming... oils, or edible fat-forming fatty acids. (b) Conditions of use. This substance is generally recognized...

  20. 40 CFR 721.3130 - Sulfuric acid, mono-C9-11-alkyl esters, sodium salts.

    Science.gov (United States)

    2010-07-01

    ... 40 Protection of Environment 30 2010-07-01 2010-07-01 false Sulfuric acid, mono-C9-11-alkyl esters, sodium salts. 721.3130 Section 721.3130 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY... significant new uses are: (i) Industrial, commercial, and consumer activities. Requirements as specified in...

  1. A chicory cytochrome P450 mono-oxygenase CYP71AV8 for the oxidation of (+)-valencene

    NARCIS (Netherlands)

    Cankar, K.; van Houwelingen, A.; Bosch, H.J.; Sonke, T.; Bouwmeester, H.; Beekwilder, J.P.

    2011-01-01

    Chicory (Cichorium intybus L.), which is known to have a variety of terpene-hydroxylating activities, was screened for a P450 mono-oxygenase to convert (+)-valencene to (+)-nootkatone. A novel P450 cDNA was identified in a chicory root EST library. Co-expression of the enzyme with a valencene

  2. MonoMax Suture: A New Long-Term Absorbable Monofilament Suture Made from Poly-4-Hydroxybutyrate

    Directory of Open Access Journals (Sweden)

    Erich K. Odermatt

    2012-01-01

    Full Text Available A long-term absorbable monofilament suture was developed using poly-4-hydroxybutyrate (P4HB made from a biosynthetically produced homopolymer of the natural metabolite 4-hydroxybutyrate. The suture, called MonoMax, has prolonged strength retention. At 12 weeks, a size 3-0 MonoMax suture retains approximately 50% of its initial tensile strength in vivo and is substantially degraded in one year with minimal tissue reaction. In contrast, PDS II monofilament suture (Ethicon, Inc., Somerville, NJ has no residual strength in vivo after 12 weeks. In vivo, the MonoMax suture is hydrolyzed primarily by bulk hydrolysis, and is then degraded via the Krebs cycle. MonoMax is substantially more compliant than other monofilament sutures, and incorporates an element of elasticity. Its tensile modulus of 0.48 GPa is approximately one-third of the value of the PDS II fiber providing an exceptionally flexible and pliable fiber with excellent knot strength and security. These features are further enhanced by the fiber's elasticity, which also improves knot security and may help prevent wound dehiscence. Because of its performance advantages, this suture may find clinical utility in applications where prolonged strength retention, and greater flexibility are required, particularly in procedures like abdominal wall closure where wound dehiscence is still a significant post-surgical complication.

  3. Iglesia y representaciones de clase en Argentina a mediados del siglo XX. Una aproximación desde la cultura clasista jocista

    Directory of Open Access Journals (Sweden)

    Blanco, Jessica

    2015-06-01

    Full Text Available The proposal of this article is the analysis about the diverse representations of classes and dynamics from the relation between the Juventud Obrera Católica (JOC Argentinian and the ecclesiastical hierarchy, with members from other laical organizations and inside the association (ecclesiastical advisers and laics. I depart here from the hypothesis that, to the middle of the XX century, the profound social differences that characterized the argentinian society were reproduced and naturalized in the Church, per both, ecclesiasticals and laics. This acquires particular implications for the operation of the one association self-styled laborer as the JOC, if it goes attached to an identification of the manual worker as a suspected being and with limited compression capacities. Anyway, this visions of intellectual and social inferiority, accepted uncritically by the jocists, coexisted with self representations of moral superiority respect to the elites questioned by their selfishness and hypocrisy, what contributed to deepen the contrasts of classes and the social distances inside the Church.La propuesta de este trabajo es el análisis de las diversas representaciones de clase y dinámicas de relación entre la Juventud Obrera Católica (JOC argentina y la jerarquía eclesiástica; en relación con miembros de otras organizaciones laicales y en el interior de la asociación, entre asesores eclesiásticos y jocistas. Parto de la hipótesis que, hacia mediados del siglo XX, las profundas diferencias sociales que caracterizaban la sociedad argentina fueron reproducidas y naturalizadas por la Iglesia, tanto por eclesiásticos como por los laicos. Lo anterior adquiere particular implicancia para el funcionamiento de una asociación autodenominada obrera como la JOC, si va unido a una identificación del trabajador manual como un ser sospechoso y con capacidades de comprensión limitadas. De todas maneras, estas visiones de inferioridad intelectual y

  4. La historia blanqueada: representaciones de los africanos y sus descendientes en Antioquia a través de la obra de Tomás Carrasquilla

    Directory of Open Access Journals (Sweden)

    Lina del Mar Moreno Tovar

    2010-06-01

    Full Text Available After independence was achieved and throughout the 19th century, political, economical and cultural Colombian elites invented a model of nation based on the idea that highlands and white race were progress exclusive raw material, as though; based on racial and geographical attributions a regional hierarchy was built, and this allowed the configuration of local identities defined by this model. Meanwhile, besides Antioquia had an important presence of African and African descendant population since colonial times, from different enunciation places and turning over the colonization entrepreneurship of the 19th century as a the foundational myth, representations that showed Antioquia and its inhabitants as a successful correlate of the relationship between Andean highlands and white race started to be created, opposing to the negative valuation over lowlands and black population. This article, on one side, examines which were the representational mechanisms of Africans and their descendants in Antioquia through Tomas Carrasquilla literary work, and, on the other, wants to make evident that those creations marginalized the contributions done by Africans and their descendants to Antioquean history.//Tras el logro de la independencia y a lo largo de todo el siglo xix, las élites políticas, económicas y culturales colombianas trazaron un modelo de nación basado en la idea de que las tierras altas y la raza blanca eran materias primas privilegiadas del progreso; así, con base en atribuciones raciales y geográficas se construyó una jerarquía regional que dio lugar a la configuración de identidades locales definidas en función de ese modelo. Entretanto, aun a pesar de que Antioquia contaba con una importante presencia de africanos y afrodescendientes desde la época colonial, desde diversos lugares de enunciación y acudiendo a la empresa colonizadora del siglo xix como mito fundacional, se empezaron a elaborar representaciones que mostraban a

  5. El imaginario tecnológico de Domingo Faustino Sarmiento: representaciones y arquetipos de América (1845-1885

    Directory of Open Access Journals (Sweden)

    Azcona Pastor, José Manuel

    2013-12-01

    Full Text Available The paper explores the technical dimension of Domingo Faustino Sarmiento’s imaginary and its influence on the construction of representations concerning nature, human types, progress of nations, and scientific personalities. As we will see, the influential Argentine statesman and writer creates, from a technologistic perspective, a wide variety of images and archetypes which can be traced in different publications. The aim of this paper is then to present these different types of symbolic features as a result of his technological attitude and to expose them according to a division that comprises four categories: the first one is devoted to images of an hostile nature; the second one examines the human archetypes he considers; the third one deals with the model nations (in particular, as a result of his trip to the United States, and the fourth one focuses on the treatment of scientists and engineers as heroes and agents of progress.El artículo examina la dimensión técnica del imaginario de Domingo Faustino Sarmiento y su influencia en la construcción de representaciones sobre la naturaleza, los tipos humanos, el progreso de las naciones, la educación y los personajes científicos. Como se verá, el influyente estadista argentino crea desde una mirada tecnologista una amplia variedad de imágenes y arquetipos que pueden reconocerse en diversas obras. El propósito del trabajo es pues la presentación de estos símbolos como un resultado de su actitud tecnológica y su exposición siguiendo una división que comprende cuatro categorías: la primera dedicada a las imágenes de una naturaleza hostil; la segunda a los arquetipos humanos; la tercera a las naciones modelo (en especial, como resultado de su viaje a Estados Unidos y la cuarta al tratamiento de la figura del científico y del tecnólogo como héroes y agentes del progreso.

  6. Representaciones en tensión: sensibilidades y modernización punitiva en un contexto de transición. Córdoba 1855-1862

    Directory of Open Access Journals (Sweden)

    Dain, Mariana

    2012-01-01

    Full Text Available Este artículo explora la dimensión de las sensibilidades penales, es decir de las emociones que suscitan los fenómenos de la penalidad. Recortando el trabajo en el tratamiento que los tópicos de justicia, castigo y pena tuvieron en los actores extrajudiciales, este análisis se centrará en el lapso comprendido entre 1855 y 1862. El diario local El Imparcial -cuyo primer número aparece en 1855- constituye la fuente principal para la indagación de tales representaciones. Es posible advertir que en este medio circulan los primeros rasgos de modernización punitiva tendientes hacia los castigos "civilizados", rasgos que dejan entrever cómo las nuevas sensibilidades influyen en las valoraciones sobre la tortura, la pena de muerte y la exhibición de cadáveres, entre otros. En un escenario considerado inmaduro aún para cambios radicales, las mínimas variaciones sostenidas en el tiempo conforman la base de los futuros cambios, efectivizados recién entrada la década del ochenta.The aim of this paper is to investigate the dimension of the penal sensitivities, it means the phenomena of the penalty causing by the emotions. This work features the impact on justice, punishment and guilty topics on extrajudicial actors, focusing the analysis between 1855 and 1862 years. A local newspaper "El Imparcial" is the main source for the investigations of such representations, published by the first time at 1855. By this mean, it is feasibly to notice about the first signs of punitive modernization tending toward "civilized" punishments, features which suggest how the new sensitivities influence the appraisals of torture, death penalty, and the corpse exhibition, among others. At that time, in a scenario considered immature even for radical changes, the minor vagaries sustained over time conceive the source of the future adjustment, completed into the eighties decade.

  7. Representaciones sociales que orientan la fecundidad de mujeres de 20 a 29 años en tres contextos socioeconómicos

    Directory of Open Access Journals (Sweden)

    Fuentes-Rodríguez, Eugenio

    2009-01-01

    Full Text Available El proceso de transición demográfica en Costa Rica produjo una reducción de la fecundidad diferencial. Las disparidades pueden ser explicadas por la heterogeneidad sociocultural, espacial y estructural, de la sociedad costarricense. En términos de grupos etarios, el de las mujeres entre 20 y 29 años es el que ha contribuido mayormente a esta reducción. La investigación tuvo como objetivo indagar la manifestación del proceso de difusión de innovaciones en la fecundidad costarricense, a través de las representaciones sociales de los métodos anticonceptivos y de la maternidad, en mujeres de 20 a 29 años de tres comunidades del país. Del análisis estadístico para 446 distritos con datos de reducción de la fecundidad y nivel socioeconómico de las madres (nivel de instrucción, unión conyugal y ocupación entre 1995-1997 y 2002-2004, se seleccionaron tres distritos para realizar entrevistas en profundidad (Sánchez de Curridabat, Tarbaca de Aserrí y Tayutic de Turrialba. Se encontró que los agentes socializadores de la educación sexual (medios de comunicación, educación formal, religión, servicios de salud y familia, no están cumpliendo un rol de información de calidad sobre la reproducción biológica, y que lo que opera es una difusión conductual más que material, enmarcada dentro de una tradición patriarcal que relega a la mujer a la reproducción social. Entre las entrevistadas de los tres distritos se mantienen desigualdades de acceso a información y respecto a proyectos de vida que vayan más allá del ámbito privado, contribuyendo a mantener inequidades sociales que se reflejan en la fecundidad diferencial actual.

  8. Representaciones sociales sobre la escritura de la tesis en dos carreras del área de humanidades: periodismo y trabajo social Representações sociais da escrita de teses em dois programas de ciências humanas: jornalismo e serviço social Social representations about thesis writing in two majors in humanities: journalism and social work

    Directory of Open Access Journals (Sweden)

    Monica Tapia Ladino

    2013-03-01

    Full Text Available Las representaciones que sobre las tareas de escritura tienen tanto estudiantes como profesores son consecuencia de sus propias experiencias y expectativas sociales. El objetivo de este artículo es relevar cómo son las representaciones sociales de docentes que guían tesis y estudiantes que han elaborado tales escritos en dos carreras del área de humanidades de una universidad chilena. Se aplicó la técnica del grupo focal a ocho docentes universitarios de las humanidades y seis entrevistas individuales a estudiantes tesistas. Los datos se analizaron siguiendo los principios de la teoría empíricamente fundada. Los resultados revelan que la escritura es una tarea que define la formación y determina la identidad profesional. La tesis de grado se asimila a los rasgos de los textos profesionales de los campos para los cuales se forman los estudiantes.As representações que tanto estudantes quanto professores têm sobre as tarefas de escritura são consequência das suas próprias experiências e expectativas sociais. O objetivo deste artigo é revelar como são as representações sociais dos professores que orientam teses e dos alunos que desenvolvem tais escritos em dois programas da área de humanidades numa universidade chilena. Aplicou-se a técnica do grupo focal a oito professores universitários das humanidades e seis entrevistas individuais com alunos em tese. Os dados foram analisados de acordo com os princípios da teoria fundada. Os resultados revelam que escrever é uma tarefa que define a formação e determina a identidade profissional. A tese é equiparada à categoria das características dos textos profissionais dos campos para os quais os alunos são formados.The representations that teachers and students have about writing tasks are a consequence of their own experiences and social expectations. The aim of this paper is to notice how the social representations of the teachers who guide research thesis and students who

  9. Rare earth element and uranium-thorium variations in tufa deposits from the Mono Basin, CA

    Science.gov (United States)

    Wilcox, E. S.; Tomascak, P. B.; Hemming, N.; Hemming, S. R.; Rasbury, T.; Stine, S.; Zimmerman, S. R.

    2009-12-01

    Samples of fossil tufa deposits from several localities in the Mono Basin, eastern California, were analyzed for trace element concentrations in order to better understand changes in lake composition in the past. These deposits were formed during the last glacial cycle, mostly during deglaciation (Benson et al., 1990, PPP). Three elevations are represented by the analyses. Samples from near Highway 167 were sampled between 2063 and 2069 m asl. Samples from near Thompson Road were sampled between 2015 and 2021 m. One layered mound was sampled at 1955 m. Concentrations of the lanthanide rare earth elements (REE), in particular the heavy/light (HREE/LREE) distributions, have been shown to be sensitive to alkalinity in modern saline lakes (e.g., Johannesson et al., 1994, GRL, 21, 773-776), and the same has been suggested for U/Th (Anderson et al., 1982, Science, 216, 514-516). Holocene to near-modern tufa towers exist in shallow water and around the current shoreline (1945 m). Tufa towers above 2000 m include a characteristic morphology termed thinolite, interpreted to represent pseudomorphs after the very cold water mineral ikaite. Most lower elevation towers do not have the thinolite morphology, but some layered tufa mounds at low elevations include several layers of thinolite, such as the one sampled for this project. Analyses were made on millimeter-scale bulk samples from tufa towers. Measurements were made on sample solutions with a Varian 820MS quadrupole ICP-MS. Mono Basin tufa samples have total REE concentrations ranging from 0.029 to 0.77 times average shales. Samples have flat to moderately HREE-enriched shale-normalized patterns with limited overall variability ([La/Lu]SN of 1.8 to 9.6) but with some variability in the slope of the HREE portion of the patterns. Tufa towers sampled from three elevations have (Gd/Lu)SN of 0.40 to 1.5. The REE patterns of most samples have small positive Ce anomalies, but a minority of samples, all from the layered tufa mound

  10. Organic geochemistry and brine composition in Great Salt, Mono, and Walker Lakes

    Science.gov (United States)

    Domagalski, Joseph L.; Orem, W.H.; Eugster, H.P.

    1989-01-01

    Samples of Recent sediments, representing up to 1000 years of accumulation, were collected from three closed basin lakes (Mono Lake, CA, Walker Lake, NV, and Great Salt Lake, UT) to assess the effects of brine composition on the accumulation of total organic carbon, the concentration of dissolved organic carbon, humic acid structure and diagenesis, and trace metal complexation. The Great Salt Lake water column is a stratified Na-Mg-Cl-SO4 brine with low alkalinity. Algal debris is entrained in the high density (1.132-1.190 g/cc) bottom brines, and in this region maximum organic matter decomposition occurs by anaerobic processes, with sulfate ion as the terminal electron acceptor. Organic matter, below 5 cm of the sediment-water interface, degrades at a very slow rate in spite of very high pore-fluid sulfate levels. The organic carbon concentration stabilizes at 1.1 wt%. Mono Lake is an alkaline (Na-CO3-Cl-SO4) system. The water column is stratified, but the bottom brines are of lower density relative to the Great Salt Lake, and sedimentation of algal debris is rapid. Depletion of pore-fluid sulfate, near l m of core, results in a much higher accumulation of organic carbon, approximately 6 wt%. Walker Lake is also an alkaline system. The water column is not stratified, and decomposition of organic matter occurs by aerobic processes at the sediment-water interface and by anaerobic processes below. Total organic carbon and dissolved organic carbon concentrations in Walker Lake sediments vary with location and depth due to changes in input and pore-fluid sulfate concentrations. Nuclear magnetic resonance studies (13C) of humic substances and dissolved organic carbon provide information on the source of the Recent sedimentary organic carbon (aquatic vs. terrestrial), its relative state of decomposition, and its chemical structure. The spectra suggest an algal origin with little terrestrial signature at all three lakes. This is indicated by the ratio of aliphatic to

  11. Oxygen vacancies in oxides studied by annihilation of mono-energetic positrons

    Energy Technology Data Exchange (ETDEWEB)

    Hugenschmidt, Christoph; Pikart, Philip [ZWE FRM II, Technische Universitaet Muenchen, Lichtenbergstrasse 1, 85747 Garching (Germany); Physik-Department E21, Technische Universitaet Muenchen, James-Franck-Strasse, 85748 Garching (Germany); Schreckenbach, Klaus [Physik-Department E21, Technische Universitaet Muenchen, James-Franck-Strasse, 85748 Garching (Germany)

    2009-07-01

    Oxygen vacancies play a fundamental role for the material properties of various oxides, e.g. charge carrier density in high-Tc superconductors, magnetic properties of diluted magnetic semiconductors or paramagnetic properties of SiO{sub 2}. In this study, open volume defects in (metal) oxides are investigated by Doppler-broadening spectroscopy (DBS) of the positron annihilation. More detailed information about the chemical surrounding at the positron annihilation site is gained by additional coincident DBS experiments, where a signature of positrons annihilating with electrons from oxygen is observed. The mono-energetic positron beam at NEPOMUC was used which allows depth dependent measurements, and hence the investigation of thin oxide layers. Recent results for metallic oxides such as ZnO are presented and compared with various non-metallic oxides such as amorphous and crystalline SiO{sub 2}, oxygen terminated Si-surface, and ice. The role of neutral and charged oxygen vacancies and the application of the positron annihilation technique to study oxygen vacancies will be discussed.

  12. Chemical Composition and Biological Activities of Mono- and Heterofloral Bee Pollen of Different Geographical Origins

    Directory of Open Access Journals (Sweden)

    Jucilene Silva Araújo

    2017-04-01

    Full Text Available Recent research shows variations in pollen chemical constituents and, consequently, in their therapeutic properties. Mono and multifloral bee pollen extracts were investigated for antioxidant and enzyme inhibitory activity properties, phenolic compounds and fatty acid composition. Generally, Eucalyptus spp. and multifloral extracts exhibited potent inhibitory activity against α-amylase, acetylcholinesterase, tyrosinase, lipoxygenase, lipase and hyaluronidase. On the other hand, Miconia spp. demonstrated higher antihemolytic activity. Cocos nucifera and Miconia spp. extracts exhibited important antioxidant properties in the different assays (ABTS, DPPH, β-carotene/linoleic acid and reducing power. Moreover, these extracts had greater amounts of total phenols and flavonoids in comparison to others. The increase in antioxidant activity (decrease in EC50 values was accompanied by an increase in the amount of total phenols in the extracts. The pollen extracts contained linoleic acid and α-linolenic acid as major fatty acids, followed by palmitic acid, and oleic acid. In this study, differences were observed in both chemical constituents and biological activities of the samples related to the geographical and botanical origin of bee pollen.

  13. Purification and crystallization of mono-ubiquitylated ubiquitin receptor Rpn10

    International Nuclear Information System (INIS)

    Keren-Kaplan, Tal; Prag, Gali

    2012-01-01

    A novel reconstitution system for the modification and purification of ubiquitylated proteins yielded the first diffracting crystals of a ubiquitylated substrate, namely Rpn10. Protein ubiquitylation controls nearly all cellular pathways in eukaryotes. A repertoire of proteins named ubiquitin (Ub) receptors harbouring ubiquitin-binding domains (UBDs) recognize ubiquitylated proteins. These Ub receptors decode the Ub signal by tethering a UBD or UBDs to a functional domain or domains, thus linking the ubiquitylated target to a specific function. The rapid dynamics of ubiquitylation/deubiquitylation has impeded the characterization of ubiquitylated proteins. To bypass this obstacle, a recently developed synthetic system that reconstructs the entire eukaryotic ubiquitylation cascade in Escherichia coli was used to purify the mono-ubiquitylated form of the regulatory proteasomal non-ATPase subunit (Ub-Rpn10) from Saccharomyces cerevisiae. Here, the first crystallization and data collection of Ub-Rpn10 is reported. Purified Ub-Rpn10 was crystallized in 12%(w/v) PEG 20 000, 0.1 M MES pH 6.5 and yielded thin rhombus-shaped crystals. X-ray analysis revealed that these crystals belonged to the monoclinic system C2, with unit-cell parameters a = 107.3, b = 49.7, c = 81.3 Å, α = γ = 90.0, β = 130.5°. A full synchrotron data set has been collected, merged and scaled with a diffraction limit of 3.14 Å

  14. Seasonal variation of mono- and sesquiterpenoid components in the essential oil of Dracocephalum kotschyi Boiss.

    Directory of Open Access Journals (Sweden)

    G. Asghari

    2014-10-01

    Full Text Available Background and objectives: Dracocephalum kotschyi is a plant which belongs to the Lamiaceae family and exists mostly in south-west Asian countries, including Iran. This plant is used as antispasmodic, analgesic and anti-inflammatory to treat rheumatoid diseases. Methods: In order to investigate the impact of the harvesting time changes on the quantity and quality of mono- and sesquiterpenoid components of D. kotschyi aerial parts, ten samples were collected from cultivated plants from 19 April to 27 August 2013. Also samples of flower and root were harvested in order to investigate their essential oil components. The essential oils were obtained through hydrodistillation method. The components were studied and identified by GC and GC ⁄ MS systems. Results: The highest yield of the essential oil was obtained on 3 May (1.10% V.W and the lowest on 28 July (0.29% V.W. Totally 55 compounds were identified in the essential oil while the highest percentage belonged to monoterpenes especially the oxygenated ones. Most variations were observed in geraniol (1.40-15.34%, geranyl acetate (trace-14.41% and neryl acetate (0.62-17.51%. The major value in most cases belonged to geranial. Conclusion: the results of this study indicate that the harvesting time of plant is an effective factor in the quality and quantity of theessential oil of Dracocephalum kotschyi.

  15. Mono-, di- and trinuclear dioxo complexes of uranium containing hydrazonato and azomethine ligands

    International Nuclear Information System (INIS)

    Gatto, C.C.; Schulz Lang, E.

    2004-01-01

    Mono-, di or trinuclear dioxouranium complexes with benzoylhydrazonato or azomethine ligands were prepared by reactions of common dioxouranium precursors such as UO 2 (NO 3 ) 2 . 6 H 2 O or [NBu 4 ] 2 [UO 2 Cl 4 ] with vanillin benzoylhydrazone (H 2 L 4 ), salicylaldehyde benzoylhydrazone (H 2 L 5 ), 2-hydroxyacetylbenzene salicylhydrazone (H 3 L 6 ) or N-(2-ethoxycarbonyl-3-oxo-but-1-en(1)yl)-2-aminophenol (H 2 L 7 ). Spectroscopic and X-ray crystallographic studies on the complexes [NBu 4 ] 2 [UO 2 Cl 4 ] . 2 H 2 L 4 , [UO 2 (HL 5 )(H 2 L 5 ) 2 ](NO 3 ), [HNEt 3 ] 2 [{UO 2 (L 6 )} 2 ] and [HNEt 3 ] 2 [{UO 2 (L 7 } 3 O)] confirm that the individual donor atom constellation, the size of the potential chelate rings and the acidity of the OH and NH functionalities of the proligands have a strong influence on the structure of the products. (Abstract Copyright [2004], Wiley Periodicals, Inc.) [de

  16. [The discrimination of mono-syllable words in noise in listeners with normal hearing].

    Science.gov (United States)

    Yoshida, M; Sagara, T; Nagano, M; Korenaga, K; Makishima, K

    1992-02-01

    The discrimination of mono-syllable words (67S word-list) pronounced by a male and a female speaker was investigated in noise in 39 normal hearing subjects. The subjects listened to the test words at a constant level of 62 dB together with white or weighted noise in four S/N conditions. By processing the data with logit transformation, S/N-discrimination curves were presumed for each combination of a speech material and a noise. Regardless of the type of noise, the discrimination scores for the female voice started to decrease gradually at a S/N ratio of +10 dB, and reached 10 to 20% at-10 dB. For the male voice in white noise, the discrimination curve was similar to those for the female voice. On the contrary, the discrimination score for the male voice in weighted noise declined rapidly from a S/N ratio of +5 dB, and went below 10% at -5 dB. The discrimination curves seem to be shaped by the interrelations between the spectrum of the speech material and that of the noise.

  17. Comparison of Mono-, Bi-, and Tripolar Configurations for Stimulation and Recording With an Interfascicular Interface.

    Science.gov (United States)

    Nielsen, Thomas N; Sevcencu, Cristian; Struijk, Johannes J

    2014-01-01

    Previous studies have indicated that electrodes placed between fascicles can provide nerve recruitment with high topological selectivity if the areas of interest in the nerve are separated with passive elements. In this study, we investigated if this separation of fascicles also can provide topologically selective nerve recordings and compared the performance of mono-, bi-, and tripolar configurations for stimulation and recording with an intra-neural interface. The interface was implanted in the sciatic nerve of 10 rabbits and achieved a median selectivity of Ŝ=0.98-0.99 for all stimulation configurations, while recording selectivity configurations was in the range of Ŝ=0.70-0.80 with the monopolar configuration providing the lowest and the average reference configuration the highest recording selectivity. Interfascicular electrodes could provide an interesting addition to the bulk of peripheral nerve interfaces available for neural prosthetic devices. The separation of the nerve into chambers by the passive elements of the electrode could ensure a higher selectivity than comparable cuff electrodes and the intra-neural location could provide an option of targeting mainly central fascicles. Further studies are, however, still required to develop biocompatible electrodes and test their stability and safety in chronic experiments.

  18. A prediction model for the effective thermal conductivity of mono-sized pebble beds

    Energy Technology Data Exchange (ETDEWEB)

    Wang, Xiaoliang; Zheng, Jie; Chen, Hongli, E-mail: hlchen1@ustc.edu.cn

    2016-02-15

    Highlights: • One new method to couple the contact area with bed strain is developed. • The constant coefficient to correlate the effect of gas flow is determined. • This model is valid for various cases, and its advantages are showed obviously. - Abstract: A model is presented here to predict the effective thermal conductivity of porous medium packed with mono-sized spherical pebbles, and it is valid when pebbles’ size is far less than the characteristic length of porous medium just like the fusion pebble beds. In this model, the influences of parameters such as properties of pebble and gas materials, bed porosity, pebble size, gas flow, contact area, thermal radiation, contact resistance, etc. are all taken into account, and one method to couple the contact areas with bed strains is also developed and implemented preliminarily. Compared with available theoretical models, CFD numerical simulations and experimental data, this model is verified to be successful to forecast the bed effective thermal conductivity in various cases and its advantages are also showed obviously. Especially, the convection in pebble beds is focused on and a constant coefficient C to correlate the effect of gas flow is determined for the fully developed region of beds by numerical simulation, which is close to some experimental data.

  19. First preclinical evaluation of mono-[123I]iodohypericin as a necrosis-avid tracer agent

    International Nuclear Information System (INIS)

    Ni, Yicheng; Chen, Feng; Marchal, Guy; Huyghe, Dieter; Verbeke, Kristin; Verbruggen, Alfons M.; Bormans, Guy M.; Witte, Peter A. de; Nuyts, Johan; Mortelmans, Luc

    2006-01-01

    We have labelled hypericin, a polyphenolic polycyclic quinone found in St. John's wort (Hypericum perforatum), with 123 I and evaluated mono-[ 123 I]iodohypericin (MIH) as a potential necrosis-avid diagnostic tracer agent. MIH was prepared by an electrophilic radioiodination method. The new tracer agent was evaluated in animal models of liver infarction in the rat and heart infarction in the rabbit using single-photon emission computed tomography (SPECT), triphenyltetrazolium chloride (TTC) histochemical staining, serial sectional autoradiography and microscopy, and radioactivity counting techniques. Using in vivo SPECT imaging, hepatic and cardiac infarctions were persistently visualised as well-defined hot spots over 48 h. Preferential uptake of the tracer agent in necrotic tissue was confirmed by perfect match of images from post-mortem TTC staining, autoradiography (ARX) and histology. Radioactivity concentration in infarcted tissues was over 10 times (liver; 3.51% ID/g in necrotic tissue vs 0.38% ID/g in normal tissue at 60 h p.i.) and over 6 times (myocardium; 0.36% ID/g in necrotic tissue vs 0.054% ID/g in normal tissue; ratios up to 18 for selected parts on ARX images) higher than in normal tissues. The results suggest that hypericin derivatives may serve as powerful necrosis-avid diagnostic agents for assessment of tissue viability. (orig.)

  20. Design and syntheses of mono and multivalent mannosyl-lipoconjugates for targeted liposomal drug delivery.

    Science.gov (United States)

    Štimac, Adela; Cvitaš, Jelena TrmĿiĿ; Frkanec, Leo; Vugrek, Oliver; Frkanec, Ruža

    2016-09-10

    Multivalent mannosyl-lipoconjugates may be of interest for glycosylation of liposomes and targeted drug delivery because the mannose specifically binds to C-type lectin receptors on the particular cells. In this paper syntheses of two types of novel O-mannosides are presented. Conjugates 1 and 2 with a COOH- and NH2-functionalized spacer and the connection to a lysine and FmocNH-PEG-COOH, are described. The coupling reactions of prepared intermediates 6 and 4 with a PEGylated-DSPE or palmitic acid, respectively, are presented. Compounds 5, mono-, 8, di- and 12, tetravalent mannosyl-lipoconjugates, were synthesized. The synthesized compounds were incorporated into liposomes and liposomal preparations featuring exposed mannose units were characterized. Carbohydrate liposomal quartz crystal microbalance based assay has been established for studying carbohydrate-lectin binding. It was demonstrated that liposomes with incorporated mannosyl-lipoconjugates were effectively recognized by Con A and have great potential to be used for targeted liposomal drug delivery systems. Copyright © 2016 Elsevier B.V. All rights reserved.

  1. Nigeria’s Mono-Cultural Economy: Impact Assessment and Prospects

    Directory of Open Access Journals (Sweden)

    Victor Nwaoba ITUMO

    2016-12-01

    Full Text Available The article takes an insight into the nature of the oil based mono-cultural economy of Nigeria, providing an in-depth analysis of the situation. It clearly assesses the oil resource based economy, highlights the impacts- positive and negative on Nigeria’s economic development and why Nigeria urgently needs to diversify its economy away from oil resource dependence. If Nigeria will not change the oil dependency economy, there will be grave implications for its economic growth and development as it already negatively affects annual budgetary provisions and other fiscal responsibilities. As it is well known, Nigeria is one of the foremost countries in the global oil export, with disruptions in its supply affecting the international oil market in some ways, huge reliance on oil as a resource has seen one of the foremost economies in Africa challenged in her economic growth and development with oil price volatility and decline on the global market. The research made use of secondary data to assess the situation and also drew the conclusion that Nigeria needs to diversify her economy as reliance on a basic resource discourages growth.

  2. Synthesis of mono and multidomain YIG particles by chemical coprecipitation or ceramic procedure

    International Nuclear Information System (INIS)

    Fernandez-Garcia, L.; Suarez, M.; Menendez, J.L.

    2010-01-01

    Yttrium iron garnet powders have been synthesized by chemical coprecipitation using two different precursors, nitrates and chlorides, and by an oxides mixture route. It is shown that depending on the precursors and synthesis conditions used pure yttrium iron garnet powders can be obtained with a mono or multidomain magnetic behaviour. The yttrium iron garnet crystalline structure, as studied by Raman spectroscopy, was already formed after calcination at temperatures as low as 800 o C when the nitrate precursors were used. However, calcination temperatures of up to 1100 o C were required to obtain yttrium iron garnet powders when the precursors were chlorides or when the oxides mixture route was chosen. The saturation magnetization of the powders correlates well with the structural characterization: when nitrate precursors were used, the saturation magnetization was already close to the bulk value, 26.8 emu/cm 3 , after calcination at 800 o C. However, the saturation magnetization of the powders obtained by the chlorides and oxides mixture routes was close to zero up to calcination temperatures of 1100 o C. Finally, both the chlorides and the oxides mixture routes yield multidomain micron sized yttrium iron garnet powders, whereas the nitrates route led to monodomain submicron sized powders.

  3. Mono- and polyadducts of C60 with anthracenes by Diels-Alder-reactions

    International Nuclear Information System (INIS)

    Duarte-Ruiz, A.

    2000-09-01

    This work describes the synthesis and characterization of seven new mono-adducts of 9-methylanthracene, 9,10-dimethylanthracene, 9-bromoanthracene. 2,3,6,7-tetramethylanthracene, 1-methylanthracene, 2,6-di-tert-butylanthracen, as well as 2-methylanthracene to fullerene C60 in solution at r.t. by means of [4+2] Diels-Alder reactions. It could be shown that the mono-adducts with 9-methylanthracene, 9,10-dimethylanthracene, and 1-methylanthracene form the corresponding antipodal bis-adduct 'trans-1' on heating the solid to 180 o C. Furthermore the functionalization of fullerene C60 anthracene mono-adduct (C60C14H10) with anthracene through [4+2] Diels-Alder reactions was investigated which made it possible to separate and to characterize the five possible bis-adducts ('trans-1', 'trans-2', 'trans-3', 'trans-4', and 'e') that can form when the second anthracene adds either 'trans' to the opposite hemisphere (compared to the first addition of anthracene) or to an equatorial position. An exact identification of the bis-adducts 'trans-2' and 'trans-4' could only be acquired with spectroscopic methods, fortunately the bis-adducts 'trans-4', 'trans-3', and 'e' could also be examined by x-ray, thus all five could be fully characterized. No bis-adducts on the same hemisphere ('cis') were found. UV/VIS-spectra of the bis-adducts opened up the possibility to identify other [4+2] Diels-Alder products in the future. It has been noticed that the eluation sequence of the bis-adducts ('trans-1' before 'trans-2' before 'trans-4' before 'trans-3' before 'e') doesn't strictly correlate with the dipole moments. Furthermore six new tris-adducts ('t4t4t2', 't3t3t3', 't3t3t4', 'et3t2', 'et3t4', and 'eee') and one tetra-adduct ('eeet3') were separated and characterized. The tris-adduct 't3t3t3' was additionally characterized by x-ray which showed that the crystal contains only one enatiomer. All bis- and tris-adducts form the antipodal bis-adduct 'trans-1' on heating to 180 o C for 10 min

  4. Glass-liquid-glass reentrance in mono-component colloidal dispersions

    International Nuclear Information System (INIS)

    Ramirez-Gonzalez, P E; Medina-Noyola, M; Vizcarra-Rendon, A; Guevara-Rodriguez, F de J

    2008-01-01

    The self-consistent generalized Langevin equation (SCGLE) theory of colloid dynamics is employed to describe the ergodic-non-ergodic transition in model mono-disperse colloidal dispersions whose particles interact through hard-sphere plus short-ranged attractive forces. The ergodic-non-ergodic phase diagram in the temperature-concentration state space is determined for the hard-sphere plus attractive Yukawa model within the mean spherical approximation for the static structure factor by solving a remarkably simple equation for the localization length of the colloidal particles. Finite real values of this property signals non-ergodicity and determines the non-ergodic parameters f(k) and f s (k). The resulting phase diagram for this system, which involves the existence of reentrant (repulsive and attractive) glass states, is compared with the corresponding prediction of mode coupling theory. Although both theories coincide in the general features of this phase diagram, there are also clear qualitative differences. One of the most relevant is the SCGLE prediction that the ergodic-attractive glass transition does not preempt the gas-liquid phase transition, but always intersects the corresponding spinodal curve on its high-concentration side. We also calculate the ergodic-non-ergodic phase diagram for the sticky hard-sphere model to illustrate the dependence of the predicted SCGLE dynamic phase diagram on the choice of one important constituent element of the SCGLE theory

  5. Glass-liquid-glass reentrance in mono-component colloidal dispersions

    Energy Technology Data Exchange (ETDEWEB)

    Ramirez-Gonzalez, P E; Medina-Noyola, M [Instituto de Fisica ' Manuel Sandoval Vallarta' , Universidad Autonoma de San Luis Potosi, Alvaro Obregon 64, 78000 San Luis Potosi, SLP (Mexico); Vizcarra-Rendon, A [Unidad Academica de Fisica, Universidad Autonoma de Zacatecas, Paseo la Bufa y Calzada Solidaridad, 98600, Zacatecas, Zac. (Mexico); Guevara-Rodriguez, F de J [Coordinacion de IngenierIa Molecular, Instituto Mexicano del Petroleo, Eje Central Lazaro Cardenas 152, 07730 Mexico, DF (Mexico)

    2008-05-21

    The self-consistent generalized Langevin equation (SCGLE) theory of colloid dynamics is employed to describe the ergodic-non-ergodic transition in model mono-disperse colloidal dispersions whose particles interact through hard-sphere plus short-ranged attractive forces. The ergodic-non-ergodic phase diagram in the temperature-concentration state space is determined for the hard-sphere plus attractive Yukawa model within the mean spherical approximation for the static structure factor by solving a remarkably simple equation for the localization length of the colloidal particles. Finite real values of this property signals non-ergodicity and determines the non-ergodic parameters f(k) and f{sub s}(k). The resulting phase diagram for this system, which involves the existence of reentrant (repulsive and attractive) glass states, is compared with the corresponding prediction of mode coupling theory. Although both theories coincide in the general features of this phase diagram, there are also clear qualitative differences. One of the most relevant is the SCGLE prediction that the ergodic-attractive glass transition does not preempt the gas-liquid phase transition, but always intersects the corresponding spinodal curve on its high-concentration side. We also calculate the ergodic-non-ergodic phase diagram for the sticky hard-sphere model to illustrate the dependence of the predicted SCGLE dynamic phase diagram on the choice of one important constituent element of the SCGLE theory.

  6. Mono or 3D video production for scientific dissemination of nuclear energy applications

    International Nuclear Information System (INIS)

    Freitas, Victor Goncalves G.; Mol, Antonio Carlos A.; Biermann, Bruna; Jorge, Carlos Alexandre F.; Araujo, Tawein

    2011-01-01

    This work presents results of educational videos development, mono or stereo, for scientific dissemination of nuclear energy applications. Nuclear energy span through many important applications for the society, ranging from electrical power generation to nuclear medicine, among others. Thus, the purpose is to disseminate this information for the general public and specially for students. Educational videos consist in a good approach for this purpose, due to the involvement of the public they provide, more than simply text or oral exposition, or even static images presentation. Stereo videos result in even more involvement of the public, besides immersion, the later due to the realism 3D views provide. The video developed in this work deals with explanations of electrical power generation, including nuclear reactor operation, shows the percentage of nuclear source as power generation all over the world, and explains also nuclear energy application in medicine. It is expected all these characteristics provided by the use of video or virtual reality techniques will achieve the purpose of disseminating such important information, regarding the benefits of nuclear energy to the society. (author)

  7. Probing the dark sector through mono-Z boson leptonic decays

    Science.gov (United States)

    Yang, Daneng; Li, Qiang

    2018-02-01

    Collider search for dark matter production has been performed over the years based on high p T standard model signatures balanced by large missing transverse energy. The mono-Z boson production with leptonic decay has a clean signature with the advantage that the decaying electrons and muons can be precisely measured. This signature not only enables reconstruction of the Z boson rest frame, but also makes possible recovery of the underlying production dynamics through the decaying lepton angular distribution. In this work, we exploit full information carried by the leptonic Z boson decays to set limits on coupling strength parameters of the dark sector. We study simplified dark sector models with scalar, vector, and tensor mediators and observe among them different signatures in the distribution of angular coefficients. Specifically, we show that angular coefficients can be used to distinguish different scenarios of the spin-0 and spin-1 models, including the ones with parity-odd and charge conjugation parity-odd operators. To maximize the statistical power, we perform a matrix element method study with a dynamic construction of event likelihood function. We parametrize the test statistic such that sensitivity from the matrix element is quantified through a term measuring the shape difference. Our results show that the shape differences provide significant improvements in the limits, especially for the scalar mediator models. We also present an example application of a matrix-element-kinematic-discriminator, an easier approach that is applicable for experimental data.

  8. Labelling by deuteration and nitroxide radicals of mono-, oligo- and polysaccharides (cellulose and amylose)

    Energy Technology Data Exchange (ETDEWEB)

    Odier, L

    1975-01-01

    The application of NMR and deuteration labelling to the investigation of polysaccharides has led to considerable progress in recent years in the knowledge of these compounds. Although far more recent, the introduction of spin labelling techniques in the investigation of polymers, has given rise to interesting EPR studies of synthetic and natural macromolecules, but nothing appears to have been accomplished in the area of spin labelling of polysaccharides. This work was aimed at applying these two techniques to the study of glucose derivatives and of some of its oligomers (low molecular weight polymers): cellobiose, maltose and cyclodextrins; and its polymers: cellulose and amylose. Irrespective of the technique employed, the complexity of the polymers and problems connected with handling them always require the same procedure: an initial study of a model compound generally prepared from the monomer or an oligomer (dimer), followed by the oligomers, and finally the polymer. Part 1 is devoted to the deuteration labelling of mono- and oligosaccharides. Part 2 concerns spin labelling of cellulose acetate. In part 3, an attempt is made to apply the spin labelling technique to the determination of conformations of two disaccharides of different glycosidic configurations: cellobiose and maltose. Part 4 is devoted to spin and deuteration labelling of ..cap alpha.. and ..beta.. cyclodextrins.

  9. Geology of epithermal silver-gold bulk-mining targets, bodie district, Mono County, California

    Science.gov (United States)

    Hollister, V.F.; Silberman, M.L.

    1995-01-01

    The Bodie mining district in Mono County, California, is zoned with a core polymetallic-quartz vein system and silver- and gold-bearing quartz-adularia veins north and south of the core. The veins formed as a result of repeated normal faulting during doming shortly after extrusion of felsic flows and tuffs, and the magmatic-hydrothermal event seems to span at least 2 Ma. Epithermal mineralization accompanied repeated movement of the normal faults, resulting in vein development in the planes of the faults. The veins occur in a very large area of argillic alteration. Individual mineralized structures commonly formed new fracture planes during separate fault movements, with resulting broad zones of veinlets growing in the walls of the major vein-faults. The veinlet swarms have been found to constitute a target estimated at 75,000,000 tons, averaging 0.037 ounce gold per ton. The target is amenable to bulkmining exploitation. The epithermal mineralogy is simple, with electrum being the most important precious metal mineral. The host veins are typical low-sulfide banded epithermal quartz and adularia structures that filled voids created by the faulting. Historical data show that beneficiation of the simple vein mineralogy is very efficient. ?? 1995 Oxford University Press.

  10. Developing new methods for the mono-end functionalization of living ring opening metathesis polymers.

    Science.gov (United States)

    Kilbinger, Andreas F M

    2012-01-01

    In this article we present a review of our recent results in one area of research we are involved in. All research efforts in our group focus on functional polymers and new ways of gaining higher levels of control with regard to the placement of functional groups within these polymers. Here, the living ring opening metathesis polymerization (ROMP) will be reviewed for which end-functionalization methods had been rare until very recently. Polymers carrying particular functional groups only at the chain-ends are, however, very interesting for a variety of industrial and academic applications. Polymeric surfactants and polymer-protein conjugates are two examples for the former and polymer-β-sheet-peptide conjugates one example for the latter. The functionalization of macroscopic or nanoscopic surfaces often relies on mono-end functional polymers. Complex macromolecular architectures are often constructed from macromolecules carrying exactly one functional group at their chain- end. The ring opening metathesis polymerization is particularly interesting in this context as it is one of the most functional group tolerant polymerization methods known. Additionally, high molecular weight polymers are readily accessible with this technique, a feature that living radical polymerizations often struggle to achieve. Finding new ways of functionalizing the polymer chain-end of ROMP polymers has therefore been a task long overdue. Here, we present our contribution to this area of research.

  11. Influence of nitrogen and phosphorous on the growth and root morphology of Acer mono.

    Science.gov (United States)

    Razaq, Muhammad; Zhang, Peng; Shen, Hai-Long; Salahuddin

    2017-01-01

    Nitrogen and phosphorous are critical determinants of plant growth and productivity, and both plant growth and root morphology are important parameters for evaluating the effects of supplied nutrients. Previous work has shown that the growth of Acer mono seedlings is retarded under nursery conditions; we applied different levels of N (0, 5, 10, and 15 g plant-1) and P (0, 4, 6 and 8 g plant-1) fertilizer to investigate the effects of fertilization on the growth and root morphology of four-year-old seedlings in the field. Our results indicated that both N and P application significantly affected plant height, root collar diameter, chlorophyll content, and root morphology. Among the nutrient levels, 10 g N and 8 g P were found to yield maximum growth, and the maximum values of plant height, root collar diameter, chlorophyll content, and root morphology were obtained when 10 g N and 8 g P were used together. Therefore, the present study demonstrates that optimum levels of N and P can be used to improve seedling health and growth during the nursery period.

  12. Inkjet Printing Based Mono-layered Photonic Crystal Patterning for Anti-counterfeiting Structural Colors

    Science.gov (United States)

    Nam, Hyunmoon; Song, Kyungjun; Ha, Dogyeong; Kim, Taesung

    2016-01-01

    Photonic crystal structures can be created to manipulate electromagnetic waves so that many studies have focused on designing photonic band-gaps for various applications including sensors, LEDs, lasers, and optical fibers. Here, we show that mono-layered, self-assembled photonic crystals (SAPCs) fabricated by using an inkjet printer exhibit extremely weak structural colors and multiple colorful holograms so that they can be utilized in anti-counterfeit measures. We demonstrate that SAPC patterns on a white background are covert under daylight, such that pattern detection can be avoided, but they become overt in a simple manner under strong illumination with smartphone flash light and/or on a black background, showing remarkable potential for anti-counterfeit techniques. Besides, we demonstrate that SAPCs yield different RGB histograms that depend on viewing angles and pattern densities, thus enhancing their cryptographic capabilities. Hence, the structural colorations designed by inkjet printers would not only produce optical holograms for the simple authentication of many items and products but also enable a high-secure anti-counterfeit technique. PMID:27487978

  13. Synthesis and Biological Evaluation of Liguzinediol Mono- and Dual Ester Prodrugs as Promising Inotropic Agents

    Directory of Open Access Journals (Sweden)

    Jing Zhang

    2014-11-01

    Full Text Available The potent positive inotropic effect, together with the relatively low safety risk of liguzinediol (LZDO, relative to currently available inotropic drugs, has prompted us to intensively research and develop LZDO as a potent positive inotropic agent. In this study, to obtain LZDO alternatives for oral chronic administration, a series of long-chain fatty carboxylic mono- and dual-esters of LZDO were synthesized, and preliminarily evaluated for physicochemical properties and bioconversion. Enhanced lipophilic properties and decreased solubility of the prodrugs were observed as the side chain length increased. All esters showed conspicuous chemical stability in phosphate buffer (pH 7.4. Moreover, the enzymatic hydrolysis of esters in human plasma and human liver microsomes confirmed that the majority of esters were converted to LZDO, with release profiles that varied due to the size and structure of the side chain. In vivo pharmacokinetic studies following oral administration of monopivaloyl (M5, monodecyl (M10 and monododecyl (M12 esters demonstrated the evidently extended half-lives relative to LZDO dosed alone. In particular the monopivaloyl ester M5 exhibited an optimal pharmacokinetic profile with appropriate physiochemical characteristics.

  14. Effect of space flight on physiological indexes and antioxidant enzymes of Acer mono

    International Nuclear Information System (INIS)

    Li Yunfei; Yang Fan; Ren Yunhui

    2012-01-01

    To investigate the effects of space flight on physiological indexes and antioxidant enzymes of Acer mono, seeds were divided into two groups, one was treated by carrying on Shijian No.8 breeding satellite for 15 d, and the other was kept on the ground as controls. 5 years old seedlings that derived from the seeds of space flight and the seeds of ground control were chosen as materials, then the growth characteristics, photosynthetic characteristics, soluble protein content and antioxidant enzymes activities were analyzed. The results showed that the plant growth, net photosynthetic rate (Pn), chlorophyll content, superoxide dismutase (SOD) activity and soluble protein content of seedlings after space flight were much higher than those of ground control. However, the changes of malondialdehyde (MDA) content, peroxidase (POD), transpiration rate (Tr), intercellular carbon dioxide concentration (Ci) and stomatal conductance (Gs) were not significantly changed. The net photosynthetic rate (Pn), as well as the plant growth of seedlings after space flight were higher than those of the control. The improved ability of photosynthesis may be one of the reasons that seedlings from seeds of space flight have higher speed of growth. (authors)

  15. Intracellular thiol levels and radioresistance: Studies with glutathione and glutathione mono ethyl ester

    International Nuclear Information System (INIS)

    Astor, M.B.; Meister, A.; Anderson, M.E.

    1987-01-01

    Intracellular thiols such as glutathione (GSH) protect cells against free radicals formed during oxidative metabolism or from exposure to drugs or ionizing radiation. The role of intracellular GSH in the repair of radiation induced free radical damage was studied using GSH or its analog glutathione mono ethyl ester (GEE), which readily penetrates into the cell. Chinese hamster V79 cells with normal GSH levels were afforded equal protection under aerated and hypoxic conditions (DMF = 1.2 OER = 3.7) by both 10 mM GSH and GEE although GEE had raised interacellular GSH levels three-fold. Growth of V79 cells in cysteine free media resulted in undetectable levels of GSH and OER of 2.2 with no change in aerated survival. Restoration of intracellular GSH by 10 mM GEE resulted in an increase of the OER from 2.2. to 3.8 (DMF = 1.7). Only 14% of the intracellular GSH needs to be repleted to give an OER of 3.0. These experiments provide evidence that thiols do play a role in the oxygen effect and are present at levels in excess of what is necessary for maximal radioprotection

  16. Nickel Electroless Plating: Adhesion Analysis for Mono-Type Crystalline Silicon Solar Cells.

    Science.gov (United States)

    Shin, Eun Gu; Rehman, Atteq ur; Lee, Sang Hee; Lee, Soo Hong

    2015-10-01

    The adhesion of the front electrodes to silicon substrate is the most important parameters to be optimized. Nickel silicide which is formed by sintering process using a silicon substrate improves the mechanical and electrical properties as well as act as diffusion barrier for copper. In this experiment p-type mono-crystalline czochralski (CZ) silicon wafers having resistivity of 1.5 Ω·cm were used to study one step and two step nickel electroless plating process. POCl3 diffusion process was performed to form the emitter with the sheet resistance of 70 ohm/sq. The Six, layer was set down as an antireflection coating (ARC) layer at emitter surface by plasma enhanced chemical vapor deposition (PECVD) process. Laser ablation process was used to open SiNx passivation layer locally for the formation of the front electrodes. Nickel was deposited by electroless plating process by one step and two step nickel electroless deposition process. The two step nickel plating was performed by applying a second nickel deposition step subsequent to the first sintering process. Furthermore, the adhesion analysis for both one step and two steps process was conducted using peel force tester (universal testing machine, H5KT) after depositing Cu contact by light induced plating (LIP).

  17. Mono or 3D video production for scientific dissemination of nuclear energy applications

    Energy Technology Data Exchange (ETDEWEB)

    Freitas, Victor Goncalves G.; Mol, Antonio Carlos A.; Biermann, Bruna; Jorge, Carlos Alexandre F., E-mail: mol@ien.gov.b, E-mail: vgoncalves@ien.gov.b, E-mail: calexandre@ien.gov.b [Instituto de Engenharia Nuclear (IEN/CNEN-RJ), Rio de Janeiro, RJ (Brazil); Araujo, Tawein [Universidade Federal do Rio de Janeiro (UFRJ), RJ (Brazil). Escola de Belas Artes; Legey, Ana Paula [Universidade Gama Filho (UGF), Rio de Janeiro, RJ (Brazil)

    2011-07-01

    This work presents results of educational videos development, mono or stereo, for scientific dissemination of nuclear energy applications. Nuclear energy span through many important applications for the society, ranging from electrical power generation to nuclear medicine, among others. Thus, the purpose is to disseminate this information for the general public and specially for students. Educational videos consist in a good approach for this purpose, due to the involvement of the public they provide, more than simply text or oral exposition, or even static images presentation. Stereo videos result in even more involvement of the public, besides immersion, the later due to the realism 3D views provide. The video developed in this work deals with explanations of electrical power generation, including nuclear reactor operation, shows the percentage of nuclear source as power generation all over the world, and explains also nuclear energy application in medicine. It is expected all these characteristics provided by the use of video or virtual reality techniques will achieve the purpose of disseminating such important information, regarding the benefits of nuclear energy to the society. (author)

  18. Isoquercitrin Esters with Mono- or Dicarboxylic Acids: Enzymatic Preparation and Properties.

    Science.gov (United States)

    Vavříková, Eva; Langschwager, Fanny; Jezova-Kalachova, Lubica; Křenková, Alena; Mikulová, Barbora; Kuzma, Marek; Křen, Vladimír; Valentová, Kateřina

    2016-06-07

    A series of isoquercitrin (quercetin-3-O-β-d-glucopyranoside) esters with mono- or dicarboxylic acids was designed to modulate hydro- and lipophilicity and biological properties. Esterification of isoquercitrin was accomplished by direct chemoenzymatic reaction using Novozym 435 (lipase from Candida antarctica), which accepted C₅- to C12-dicarboxylic acids; the shorter ones, such as oxalic (C₂), malonic (C₃), succinic (C₄) and maleic (C₄) acids were not substrates of the lipase. Lipophilicity of monocarboxylic acid derivatives, measured as log P, increased with the chain length. Esters with glutaric and adipic acids exhibited hydrophilicity, and the dodecanedioic acid hemiester was more lipophilic. All derivatives were less able to reduce Folin-Ciocalteau reagent (FCR) and scavenge DPPH (1,1-diphenyl-2-picrylhydrazyl) than isoquercitrin; ABTS (2,2'-azinobis-(3-ethylbenzothiazoline-6-sulfonic acid)) radical-scavenging activity was comparable. Dodecanoate and palmitate were the least active in FCR and ABTS scavenging; dodecanoate and hemiglutarate were the strongest DPPH scavengers. In contrast, most derivatives were much better inhibitors of microsomal lipoperoxidation than isoquercitrin; butyrate and hexanoate were the most efficient. Anti-lipoperoxidant activity of monocarboxylic derivatives, except acetates, decreased with increasing aliphatic chain. The opposite trend was noted for dicarboxylic acid hemiesters, isoquercitrin hemidodecanedioate being the most active. Overall, IQ butyrate, hexanoate and hemidodecanedioate are the most promising candidates for further studies.

  19. The k0-based neutron activation analysis: a mono standard to standardless approach of NAA

    International Nuclear Information System (INIS)

    Acharya, R.; Nair, A.G.C.; Sudarshan, K.; Goswami, A.; Reddy, A.V.R.

    2006-01-01

    The k 0 -based neutron activation analysis (k 0 -NAA) uses neutron flux parameters, detection efficiency and nuclear constants namely k 0 and Q 0 for the determination of concentration of elements. Gold ( 197 Au) or any other element having suitable nuclear properties is used as external or internal single comparator. This article describes the principle of k 0 -NAA and standardization of method by characterization of reactor irradiation sites and calibration of efficiency of the detector and applications. The method was validated using CRMs obtained from USGS, IAEA and NIST. The applications of method includes samples like gemstones (ruby, beryl and emerald), sediments, manganese nodules and encrustations, cereals, and medicinal and edible leaves. Recently, a k-o-based internal mono standard INAA (IM-NAA) method using in-situ relative efficiency has been standardized by us for the analysis of small and large samples of different shapes and sizes. The method was applied to a new meteorite sample and large size wheat samples. Non-standard size and shape samples of nuclear cladding materials namely zircaloy 2 and 4, stainless steels (SS 316M and D9) and 1S aluminium were analysed. Standard-less analysis of these cladding materials was possible by mass balance approach since all the major and minor elements were amenable to NAA. (author)

  20. Adjuvant effects of inhaled mono-2-ethylhexyl phthalate in BALB/cJ mice

    DEFF Research Database (Denmark)

    Hansen, Jitka Stilund; Larsen, Søren Thor; Poulsen, Lars K.

    2007-01-01

    Phthalates, including di(2-ethylhexyl) phthalate (DEHP), are widely used and have been linked with the development of wheezing and asthma. The main metabolite of DEHP, mono-2-ethylhexyl phthalate (MEHP), was investigated for adjuvant effects in a mouse inhalation model. BALB/cJ mice were exposed...... to aerosols of 0.03 or 0.4 mg/m(3) MEHP 5 days/week for 2 weeks and thereafter weekly for 12 weeks together with a low dose of ovalbumin (OVA) as a model allergen. Mice exposed to OVA alone or OVA+Al(OH)(3) served as negative and positive controls, respectively. Finally, all groups were exposed to a nebulized...... as of eosinophils in BAL fluid were observed. OVA-specific IgG1 production in both MEHP groups was significantly increased. OVA-specific IgE and IgG2a were not increased significantly. A dose-dependent increase in inflammatory cells was observed in BAL fluid, leading to significantly higher lymphocyte...

  1. Synthesis, chemical and biological properties of the new mono- and bis-derivatives of imidazoles

    Directory of Open Access Journals (Sweden)

    E. V. Welchinska

    2014-12-01

    Institute of Pharmacology and Toxicology of National Academy of Medical Sciences of Ukraine. The lectin’s preparations were obtained by treatment of culture Liquid of saprophytic strain Bacillus from Ukrainian Collection of Microorganisms of Institute of Microbiology and Virology (IMV: B. polymyxa 102 KGU; in future: lectine 102 was clarified by treatment with ammonium sulfate (70% concentration of a saturated solution. Results. For the first time the interaction of a series of imidazole substituted with halothane compounds have been investigated, the conditions of the reaction have been defined, the methods have been developed and the composition of the reaction products has been studied. The studies revealed that the initial heterocycle, namely imidazole reacts with the intermediate product of halothane conversion in an alkaline medium, under conditions of phase transfer catalysis DB-18-crown-6 in a solvent system (dimethyl formamide - benzene - diethyl ether or in another variant: in DMSO with the presence of anhydrous potassium carbonate with the formation of mono-and bis-derivatives of imidazole. This reaction made possible a new strategy of synthesis of selectively poly-functionalized molecules, the chemical structure of which is available for incorporation of new pharmacophore fragments into molecule. It has been discovered that mono-, bis-derivatives of imidazole, molecular complex of bis-derivative of imidazole and antitumour bacterial lectin are low toxic preparations (LD50: from 278 mg/kg to 102 mg/kg. Conclusion. New mono- and bis-adducts of imidazole, molecular complex of Bacillus polymyxa 102 KGU and imidazole bis-derivative have been prepared and its toxicity has been tested. New convenient methods for the preparation of heterocyclic mono- and bis-adducts of imidazole with 1,1,1-trifluoro-2-bromo-2-chloroethane (halothane have been described. The reactions were catalyzed by DB-18-crown-6-complex (at the alkali medium. Investigation of the critical toxicity

  2. Mono-(2-Ethylhexyl Phthalate Promotes Pro-Labor Gene Expression in the Human Placenta.

    Directory of Open Access Journals (Sweden)

    Ximi K Wang

    Full Text Available Women exposed to phthalates during pregnancy are at increased risk for delivering preterm, but the mechanism behind this relationship is unknown. Placental corticotropin-releasing hormone (CRH and cyclooxygenase-2 (COX-2 are key mediators of parturition and are regulated by the non-canonical NF-kB (RelB/p52 signaling pathway. In this study, we demonstrate that one of the major phthalate metabolites, mono-(2-ethylhexyl-phthalate (MEHP, increased CRH and COX-2 mRNA and protein abundance in a dose-dependent manner in primary cultures of cytotrophoblast. This was coupled with an increase in nuclear import of RelB/p52 and its association with the CRH and COX-2 promoters. Silencing of NF-kB inducing kinase, a central signaling component of the non-canonical NF-kB pathway, blocked MEHP-induced upregulation of CRH and COX-2. These results suggest a potential mechanism mediated by RelB/p52 by which phthalates could prematurely induce pro-labor gene activity and lead to preterm birth.

  3. Ikaite precipitation by mixing of shoreline springs and lake water, Mono Lake, California, USA

    Science.gov (United States)

    Bischoff, James L.; Stine, Scott; Rosenbauer, Robert J.; Fitzpatrick, John A.; Stafford, Thomas W., Jr.

    1993-08-01

    Metastable ikaite (CaCO 3·6H 2O) forms abundantly during winter months along the south shoreline of Mono Lake where shoreline springs mix with lake water. Ikaite precipitates because of its decreased solubility at low temperature and because of orthophosphate-ion inhibition of calcite and aragonite. During the spring some of the ikaite is transformed to anhydrous CaCO 3 and is incorporated into tufa, but most is dispersed by wave action into the lake where it reacts to form gaylussite (Na 2Ca(CO 3) 2· 5H 2O). Spring waters have low pH values, are dominantly Ca-Na-HCO 3, have low radiocarbon activities, and are mixtures of deep-seated geothermal and cold groundwaters. Chemical modeling reveals that precipitation of CaCO 3 can occur over a broad range of mixtures of spring and lake water with a maximum production occurring at 96% spring water and 4% lake water. Under these conditions all the Ca and a significant fraction of the CO 3 of the precipitate is spring supplied. A radiocarbon age of 19,580 years obtained on a natural ikaite sample supports this conclusion. With the springs supplying a large and probably variable portion of the carbonate, and with apparent 14C age of the carbonate varying from spring to spring, tufa of similar actual antiquity may yield significantly different 14C dates, making tufa at this location unsuitable for absolute age dating by the radiocarbon method.

  4. Representaciones Sociales de la Historia Universal: Posicionamientos Diferenciales en Función de la Ideología Política, Religiosidad y Nacionalismo en una Muestra Argentina

    Directory of Open Access Journals (Sweden)

    Fernanda Mariel Sosa

    2016-01-01

    Full Text Available Con el objetivo de analizar las representaciones sociales de la historia a través de los sentimientos que despiertan 24 personajes de la historia universal, se administró una versión modificada del cuestionario construido por Liu et al. (2005 a una muestra intencional ( n =369 de Argentina (55.7% mujeres, m edad =36.20, de edad =11.16. El análisis de con - glomerados no jerárquico arrojó 4 grupos en función de la religiosidad, el nacionalismo y el posicionamiento ideológico de los participantes. Por su parte, del análisis de clúster jerárquico, en función de los sentimientos hacia los personajes, se desprendieron 2 conglomerados denominados héroes y villanos . Los personajes religiosos y políticos son los que mayor disenso suscitan.

  5. Padecimientos y enfermedades en el "puerto insalubre": construcción del conocimiento médico sanitario y de las representaciones sociales sobre la muerte en Arica, 1880-1930

    Directory of Open Access Journals (Sweden)

    Pablo Chávez Zúñiga

    2015-03-01

    Full Text Available El propósito de este artículo es explicar el contexto sanitario de la ciudad de Arica. Los brotes epidémicos, comunes durante el período, construyeron las representaciones sociales de la ciudad como un “puerto insalubre”. Lo anterior ocurrió, al menos, con las siguientes enfermedades: peste bubónica, las fiebres palúdicas y otras patologías contagiosas.El trabajo examina un espacio con precarias condiciones sanitarias, a consecuencia de una infraestructura débil, como por ejemplo, en la red de alcantarillado. En esta situación se conjugaron varios elementos, destacando el desarrollo de la “cuestión social y sanitaria” que se expresó en una mortalidad elevada debido a que las instituciones gubernamentales, entre éstas los hospitales,eran consideradas como entidades de beneficencia.

  6. Núcleo central e periferia das representações sociais de ciclos de aprendizagem entre professores Centro y periferia de las representaciones sociales de ciclos de aprendizaje entre maestros Core and periphery of social representation cycles between learning teachers

    Directory of Open Access Journals (Sweden)

    Laêda Bezerra Machado

    2010-06-01

    Full Text Available Este artigo identifica as representações sociais de ciclos de aprendizagem entre professores de Recife e suas implicações práticas, demarcando a saliência e estrutura dessas representações. Participaram do estudo 103 professores. O procedimento de coleta utilizado foi a associação livre de palavras. Os dados foram processados pelo software EVOC, que oferece um gráfico com quatro quadrantes onde localizamos o provável núcleo central e sistema periférico da representação social. Os resultados apontam um discurso racionalizado, ou seja, a saliência dessa representação permite afirmar que os docentes, embora na prática critiquem e rechacem os ciclos de aprendizagem, nas suas representações revelam sintonia com a proposta da rede municipal. Sugerimos, portanto, estudos mais densos das práticas cotidianas desses docentes, para depreender aspectos das representações sociais que nos pareceram pouco revelados.El artículo identifica las representaciones sociales de los ciclos de aprendizaje entre los profesores de Recife y sus implicaciones prácticas, señalando la importancia y la estructura de estas representaciones. Los participantes fueron 103 docentes. El procedimiento de recolección utilizado fue la asociación libre de palabras. Los datos fueron procesados por software EVOC, que ofrece un gráfico con cuatro cuadrantes donde localizamos el probable núcleo central y sistema periférico de la representación social. Los resultados muestran un discurso racional, es decir, la importancia de esta representación permite afirmar que los profesores, aunque en la práctica critican y niegan los ciclos de aprendizaje, en sus representaciones muestran de acuerdo con la propuesta de la red municipal. Sugerimos, por lo tanto, los estudios más densos de las prácticas cotidianas de los profesores, para inferir aspectos de las representaciones sociales que nos parezcan poco revelados.This article identifies the social

  7. La mujer en "La Voz del Interior" representaciones de género de 1973-1983 The Woman in "La Voz del Interior" Gender Representations 1973-1983

    Directory of Open Access Journals (Sweden)

    Marta Palacio

    2011-12-01

    Full Text Available Este ensayo presenta un análisis discursivo de las representaciones de género sobre la mujer contenidas en La Voz del Interior, periódico de la Ciudad de Córdoba, en algunos ejemplares publicados durante dos períodos socio-políticos cotejados: el breve período democrático de 1973-1976 y el período de la dictadura militar de 1976-1983.This paper presents a discursive analysis of gender representations on women in La Voz del Interior, the newspaper of the city of Córdoba, in some issues published during two socio-political compared periods, the brief democratic period 1973-1976 and the period of the military dictatorship of 1976-1983.

  8. Social representations of family and violence Representaciones sociais de la familia y violencia Representações sociais da família e violência

    Directory of Open Access Journals (Sweden)

    Normélia Maria Freire Diniz

    2007-12-01

    Full Text Available The idea of family alludes to relations of protection. Generally, the thought and idealized family connotes hegemony. In Brazil, adopting the idea of families would be more appropriate considering the ethnic and cultural multiplicity. However, it is in this refuge that generally involves relations between adults, youth and children, that domestic violence occurs, which is a social phenomenon of alarming relevance. This review article aimed to discuss the relation between social representations of family and violence in a space of family relations, from studies performed with various social groups composed of women and/or men, children, health professionals and health managers. Theses and dissertations, developed in the Federal Universities of Pernambuco and Bahia, Brazil, were used as the study base. The studies full reading was followed by a registration form. The results pointed the family as a moral value that makes difficulty breaking relations of violence. The existent paradigms in social and health areas that influence and establish professional actions, do not answer to the consideration of the phenomenon family violence.La idea de familia remete a las relaciones de protección. En general, la familia pensada e idealizada indica hegemonía. En Brasil, sería más apropiado volver natural la idea de familias, considerando la multiplicidad étnica y cultural. Aún así, es en este refugio que involucra las relaciones entre adultos, jóvenes y niños, que la violencia familiar ocurre, ganando tal fenómeno relevancia. Este artículo de revisión objetiva discutir la relación entre las representaciones sociales de familia y de violencia en el espacio de las relaciones familiares, basado en estudios realizados con grupos sociales diversos. Se tomó como base tesis y disertaciones de la Universidad Federal de Pernambuco y de la Universidad Federal de Bahia. La lectura integral de los estudios fue guiada por una ficha de registro. Los

  9. Representaciones sociales de actividad física y sus condicionantes para su práctica en docentes de la localidad Los Mártires de Bogotá, D.C.

    Directory of Open Access Journals (Sweden)

    Mary Luz Ocampo-Plazas

    2016-09-01

    Full Text Available Introducción. Las instituciones educativas son escenarios de riqueza cultural y social que favorecen la adopción de estilos de vida como la práctica de actividad física (AF. Los docentes poseen un acercamiento a la AF que es necesario reconocer, ya que juegan un papel fundamental en el proceso de adquisición de hábitos. Objetivo. Describir las representaciones sociales de AF que tienen los docentes de los ciclos I y II de colegios distritales en la localidad los Mártires, Bogotá, y establecer los condicionantes para su práctica. Materiales y métodos. Estudio exploratorio, descriptivo y cualitativo realizado con 48 docentes distribuidos aleatoriamente, en el que, a través de grupos focales, se indagó sobre las representaciones de AF y los condicionantes para su práctica. La información fue procesada mediante triangulación, haciendo uso del análisis del discurso. Resultados. La mayoría de los participantes definieron la AF desde una perspectiva biológica. En cuanto a los condicionantes, se destacaron más limitaciones en relación con la seguridad del entorno, las políticas institucionales y la actitud de los docentes, esta última como limitante y facilitador dependiendo del caso. Conclusiones. En el concepto de AF no se observa diferencia en términos de ejercicio, deporte, recreación o juego; sin embargo, se resalta su importancia para el escolar, pues el desarrollo humano se favorece al realizar AF. Ahora bien, en algunos casos, solo el profesional en AF puede promoverla, por lo que pocos docentes la involucran en sus clases.

  10. Las representaciones sociales de las crisis y la reproducción del círculo de la pobreza en mujeres con estudios primarios Crisis social representations and poverty circle reproduction in women with elemental school studies

    Directory of Open Access Journals (Sweden)

    Susana Seidmann

    2006-12-01

    Full Text Available Se realizó un estudio exploratorio con el objetivo de detallar la relación entre las representaciones sociales de las crisis y las consecuencias de estas últimas; centrando el análisis, en particular, en el abandono escolar. Se efectuaron entrevistas semiestructuradas a 41 participantes de diferente género, de 20 a 30 años, residentes en la ciudad de Buenos Aires, de las cuales fueron seleccionadas las que correspondían al grupo de mujeres con menor educación para ser analizadas con mayor profundidad. Los resultados muestran que la representación social de las crisis en estas jóvenes, operan como motivo para abandonar el sistema educativo formal, sin generar conflictos en el grupo de pertenencia y perpetuando así el sistema de exclusión social. Se pone en evidencia que la función socializadora de la educación moldea dichas representaciones según las condiciones de reproducción del sistema económico social globalizado.An exploratory study was carried out in order to explore the relationship between crisis social representations and their consequences, stressing the analysis especially in school drop off. Forty one semi-structured interviewing were achieved of different gender participants, in ages between 20 and 30 years old, living in Buenos Aires city. From these those concerning young women, with elementary school studies were selected and more profoundly analyzed. The results show that the social representation of the crisis in these young women, work as a reason to give up the regular educational system without conflicts with the own group, perpetuating in this way the social exclusion system. This shows the evidence that the education socializing function molds it according to the conditions of the reproduction of the globalized social economical system.

  11. Single-molecule magnetism in a single-ion triamidoamine uranium(V) terminal mono-oxo complex

    Energy Technology Data Exchange (ETDEWEB)

    King, David M.; McMaster, Jonathan; Lewis, William; Blake, Alexander J.; Liddle, Stephen T. [Nottingham Univ. (United Kingdom). School of Chemistry; Tuna, Floriana; McInnes, Eric J.L. [Manchester Univ. (United Kingdom). School of Chemistry

    2013-04-26

    Straightforward oxidation of a triamidoamine uranium(III) complex with trimethyl-N-oxide affords a uranium(V) terminal mono-oxo complex which is the first clear-cut example of a uranium(V) single-molecule magnet (SMM). This monometallic complex unambiguously shows that a strongly axially ligated and thus anisotropic ligand field can be used to overcome the limited magnetic anisotropy of uranium(V). [German] Die direkte Oxidation eines Triamidoamin-Uran(III)-Komplexes mit Trimethyl-N-oxid liefert einen terminalen Uran(V)-Mono(oxo)komplex, der das erste gesicherte Beispiel eines Uran(V)-Einzelmolekuelmagnets ist. Dieser monometallische Komplex zeigt eindeutig, dass ein starkes axiales und somit anisotropes Ligandenfeld die begrenzte magnetische Anisotropie von Uran(V) beseitigen kann.

  12. Elastic source model of the North Mono eruption (1325-1368 A.D.) based on shoreline deformation

    Science.gov (United States)

    Shaffer, Wil; Bursik, Marcus; Renshaw, Carl

    2010-12-01

    Topographic data from the Shuttle Radar Topography Mission (SRTM) captures the permanent deformation of a prominent highstand of Mono Lake, California USA. Deformation of the Dechambeau Ranch highstand shoreline was measured using the elevation of the beach berm—shoreline bluff break-in-slope. Point source models and a boundary element dike model were used to approximate the source of deformation underneath the northern end of the Mono Craters. The point source model could not adequately explain the observed deformation. The dike model yielded the best results for a NW trending dike dipping 60° NE and inflated to widths greater than 60 m. The results suggest that the geometry of the source is more complex than a simple vertical dike and that the deformation is better explained with a dipping dike following a normal fault, or an elongated cryptodome.

  13. A load-displacement based approach to assess the bearing capacity and deformations of mono-bucket foundations

    DEFF Research Database (Denmark)

    Vahdatirad, Mohammadjavad; Diaz, Alberto Troya; Nielsen, Søren

    2016-01-01

    It is now accepted that a larger effort must be made in order to optimize the design so that offshore wind turbines can be competitive with the other energy resources. In this regard, mono-buckets are known as a cost-effective offshore foundation solution. In the current study, a load–displacemen......It is now accepted that a larger effort must be made in order to optimize the design so that offshore wind turbines can be competitive with the other energy resources. In this regard, mono-buckets are known as a cost-effective offshore foundation solution. In the current study, a load...... and run the calculations is proposed. The model is validated, and its accuracy is analyzed, by comparison with field test results for a bucket foundation installed in silty, sandy soil....

  14. Pulsed electromagnetic field affects intrinsic and endoplasmatic reticulum apoptosis induction pathways in MonoMac6 cell line culture.

    Science.gov (United States)

    Kaszuba-Zwoinska, J; Chorobik, P; Juszczak, K; Zaraska, W; Thor, P J

    2012-10-01

    Current studies were aimed to elucidate influence of pulsed electromagnetic field stimulation on cell viability and apoptosis induction pathways. For the experimental model we have chosen monocytic cell line MonoMac6 and several apoptosis inducers with different mechanism of death induction like puromycin, colchicine, cyclophosphamide, minocycline and hydrogen peroxide. MonoMac6 cell line was grown at density 1x10(5) cells/well in 96-well culture plates. To induce cell death cell cultures were treated with different apoptosis inducers like puromycin, colchicine, cyclophosphamide, minocycline, hydrogen peroxide and at the same time with pulsed electromagnetic field 50 Hz, 45±5 mT (PEMF) for 4 hour per each stimulation, three times, in 24 hours intervals. Afterwards, cells were harvested for flow cytometry analysis of cell viability measured by annexin V-APC labeled and propidium iodide staining. Expression of apoptosis related genes was evaluated by semi quantitative reverse transcription (RT)-PCR assay. NuPAGE Novex Western blot analysis was carried out for apoptosis inducing factor (AIF) abundance in cytosolic and nuclear extracts of MonoMac6 cells. Puromycin, colchicine and minocycline activated cells and simultaneously treated with PEMF have shown out diminished percentage of annexinV positive (AnV+) cells comparing to controls without PEMF stimulation. MonaMac6 cells puromycin/colchicyne and PEMF treated were to a higher extent double stained (AnV+,PI+), which means increased late apoptotic as well as necrotic (PI+) cells, than non-stimulated controls. On the other hand, minocycline activated cells prior to PEMF treatment showed diminished amount of apoptotic and necrotic (annexin V, annexin V and propidium iodide, propidium iodide positive staining) cells. The opposite effect of PEMF on the percentage of annexin V positively stained cells has been achieved after treatment of MonoMac6 culture with cyclophoshamide and hydrogen peroxide. PEMF enhanced early

  15. Bayesian risk maps for Schistosoma mansoni and hookworm mono-infections in a setting where both parasites co-exist

    Directory of Open Access Journals (Sweden)

    Giovanna Raso

    2007-11-01

    Full Text Available There is growing interest in the use of Bayesian geostatistical models for predicting the spatial distribution of parasitic infections, including hookworm, Schistosoma mansoni and co-infections with both parasites. The aim of this study was to predict the spatial distribution of mono-infections with either hookworm or S. mansoni in a setting where both parasites co-exist. School-based cross-sectional parasitological and questionnaire surveys were carried out in 57 rural schools in the Man region, western Côte d’Ivoire. A single stool specimen was obtained from each schoolchild attending grades 3-5. Stool specimens were processed by the Kato-Katz technique and an ether concentration method and examined for the presence of hookworm and S. mansoni eggs. The combined results from the two diagnostic approaches were considered for the infection status of each child. Demographic data (i.e. age and sex were obtained from readily available school registries. Each child’s socio-economic status was estimated, using the questionnaire data following a household-based asset approach. Environmental data were extracted from satellite imagery. The different data sources were incorporated into a geographical information system. Finally, a Bayesian spatial multinomial regression model was constructed and the spatial patterns of S. mansoni and hookworm mono-infections were investigated using Bayesian kriging. Our approach facilitated the production of smooth risk maps for hookworm and S. mansoni mono-infections that can be utilized for targeting control interventions. We argue that in settings where S. mansoni and hookworm co-exist and control efforts are under way, there is a need for both mono- and co-infection risk maps to enhance the cost-effectiveness of control programmes.

  16. Preparation of diesel emulsion using auxiliary emulsifier mono ethylene glycol and utilization in a turbocharged diesel engine

    International Nuclear Information System (INIS)

    Yilmaz, Emre; Solmaz, Hamit; Polat, Seyfi; Uyumaz, Ahmet; Şahin, Fatih; Salman, M. Sahir

    2014-01-01

    Highlights: • Mono-ethylene glycol was used as an auxiliary emulsifier. • Using mono ethylene glycol prolonged precipitation duration of emulsions. • With using E5 and E10 fuels engine torque averagely increased by 0.35% and 1.73% respectively. • It was found that specific fuel consumption of emulsions is lower than diesel. • Using E10 fuel reduced CO, NO x and soot emissions 44%, 47% and 5% respectively. - Abstract: Diesel engines are used widely as they have lower fuel consumption and higher thermal efficiency in transportation sector. However, the emitted high NO x , CO and soot emissions have led researchers to search different alternative fuels. At this point, diesel fuels emulsions help to reduce exhaust emissions. In this study, the effects of diesel fuel emulsions containing 5% (E5) and 10% (E10) water on engine performance an exhaust emissions has been investigated. Mono ethylene glycol was used as an auxiliary emulsifier in the preparation of the emulsion. Use of the mono ethylene glycol reduced the subsidence rate of the E5 and E10 about 34.5% and 47.1% respectively. The experiments were conducted at full load condition and at 2500, 3250 and 4000 rpm engine speeds. Engine torque and power increased according to diesel fuel between 2400 and 3600 engine speed range when emulsified fuels were used. But significant reductions were observed after that engine speed range. It was observed that the nitrogenoxide (NO x ) emission reduced 5.42% and 11.01% with using E5 and E10 fuel respectively according to diesel fuel at 2500 rpm. Also the soot emissions reduced 12.39% and 22.97% with using E5 and E10

  17. Single-molecule magnetism in a single-ion triamidoamine uranium(V) terminal mono-oxo complex

    International Nuclear Information System (INIS)

    King, David M.; McMaster, Jonathan; Lewis, William; Blake, Alexander J.; Liddle, Stephen T.; Tuna, Floriana; McInnes, Eric J.L.

    2013-01-01

    Straightforward oxidation of a triamidoamine uranium(III) complex with trimethyl-N-oxide affords a uranium(V) terminal mono-oxo complex which is the first clear-cut example of a uranium(V) single-molecule magnet (SMM). This monometallic complex unambiguously shows that a strongly axially ligated and thus anisotropic ligand field can be used to overcome the limited magnetic anisotropy of uranium(V). [de

  18. Microwave Photocatalysis of Mono-Chloroacetic Acid over Nanoporous Titanium(IV) Oxide Thin Films Using Mercury Electrodeless Discharge Lamps

    Czech Academy of Sciences Publication Activity Database

    Církva, Vladimír; Žabová, Hana; Hájek, Milan

    2008-01-01

    Roč. 198, č. 1 (2008), s. 13-17 ISSN 1010-6030 R&D Projects: GA ČR GA104/06/0992; GA ČR GA104/07/1212 Institutional research plan: CEZ:AV0Z40720504 Keywords : microwave-assisted photocatalysis * electrodeless discharge lamp * mono-chloroacetic acid Subject RIV: CH - Nuclear ; Quantum Chemistry Impact factor: 2.362, year: 2008

  19. Effects of neutron irradiation on microstructure and deformation behaviour of mono- and polycrystalline molybdenum and its alloys

    DEFF Research Database (Denmark)

    Singh, B.N.; Evans, J.H.; Horsewell, A.

    1998-01-01

    The influence of neutron irradiation on microstructural evolution and mechanical properties of mono- and polycrystalline molybdenum and its alloys has been investigated. Tensile specimens and 3 mm diameter discs of monocrystals of pure molybdenum and Mo-5%Re were irradiated with fission neutrons...... microscopy are presented and discussed in terms of intracascade clustering of self-interstitial atoms and the role of one-dimensional glide of these clusters in controlling microstructural evolution and the resulting mechanical properties....

  20. Stochastic resonance in a time-delayed mono-stable system with correlated multiplicative and additive white noise

    International Nuclear Information System (INIS)

    Zhou Yu-Rong

    2011-01-01

    This paper considers the stochastic resonance for a time-delayed mono-stable system, driven by correlated multiplicative and additive white noise. It finds that the output signal-to-noise ratio (SNR) varies non-monotonically with the delayed times. The SNR varies non-monotonically with the increase of the intensities of the multiplicative and additive noise, with the increase of the correlation strength between the two noises, as well as with the system parameter. (general)