WorldWideScience

Sample records for entre caracterizaciones molecular

  1. Nanoparticulas basadas en complejos de Fe(II) con transicion de espin: sintesis, caracterizacion y aplicaciones en electronica molecular

    Science.gov (United States)

    Monrabal Capilla, Maria

    Esta tesis doctoral esta organizada en 5 capitulos y esta destinada al estudio de sistemas de Fe (II) que presentan el fenomeno de la transicion de espin a escala nanometrica. El capitulo 1 contiene una introduccion general sobre materiales moleculares multifuncionales, destacando aquellos ejemplos mas importantes. Por otro lado, se explicara el fenomeno de la transicion de espin, tratando aspectos conceptuales, los antecedentes mas importantes y la situacion actual. En el capitulo 2 se describen los diferentes procesos existentes para la obtencion de diferentes tipos de nanoparticulas. Ademas, se presenta la sintesis y caracterizacion de nanoparticulas del polimero de coordinacion unidimensional [Fe(Htrz)2(trz)]BF4, obtenidas mediante el metodo de micelas inversas. Estas nanoparticulas, con una estrecha distribucion de tamanos centrada alrededor de los 11 nm, presentan una transicion de espin muy abrupta, con un ancho ciclo de histeresis termica de unos 40K. En el capitulo 3 se describe el proceso de modificacion del tamano de las nanoparticulas descritas en el capitulo anterior, llevado a cabo variando la proporcion de surfactante/H2O en el medio. Ademas, con el objetivo de modificar las propiedades magneticas de las nanoparticulas obtenidas en el capitulo 2, se lleva a cabo la sintesis de nanoparticulas de polimeros de la misma familia del [Fe(Htrz)2(trz)]BF4. En concreto se sintetizaron 3 nuevos tipos de nanoparticulas basadas en el polimero [Fe(Htrz)1-x(NH2trz)x](ClO4)2, siendo x = 0.05, 0.15 y 0.3, en cada caso. Estas nanoparticulas siguen presentando una estrecha distribucion de tamanos y una transicion de espin muy abrupta y con un ancho ciclo de histeresis. Ademas, se observa que este ciclo se desplaza a temperaturas mas proximas a la temperatura ambiente a medida que se aumenta el porcentaje de 4-amino-1, 2, 4- triazol en la muestra. Pero al mismo tiempo se produce una disminucion de la anchura de este ciclo. Por ultimo, en este capitulo se presenta la

  2. Hydrodynamic characterization and molecular weight estimation of ultrasonically sheared DNA; Caracterizacion hidrodinamica y estimacion de pesos moleculares de DNA degradado por ultrasonidos

    Energy Technology Data Exchange (ETDEWEB)

    Casal, J I; Garces, F; Garcia-Sacristan, A

    1981-07-01

    The sedimentation coefficients and intrinsic viscosities of ultrasonically sheared calf thymus DNA have been determined. The molecular weight estimation according to this parameters have been compared with the ones obtained from the electrophoretic migration rates based on the calibration proposed using the known molecular weight restriction fragments of X-ENA. (Author) 35 refs.

  3. Characterization of Hospital Residuals; Caracterizacion de Residuos Hospitalarios

    Energy Technology Data Exchange (ETDEWEB)

    Blanco Meza, A; Bonilla Jimenez, S

    1997-07-01

    The main objective of this investigation is the characterization of the solid residuals. A description of the handling of the liquid and gassy waste generated in hospitals is also given, identifying the source where they originate. To achieve the proposed objective the work was divided in three stages: The first one was the planning and the coordination with each hospital center, in this way, to determine the schedule of gathering of the waste can be possible. In the second stage a fieldwork was made; it consisted in gathering the quantitative and qualitative information of the general state of the handling of residuals. In the third and last stage, the information previously obtained was organized to express the results as the production rate per day by bed, generation of solid residuals for sampled services, type of solid residuals and density of the same ones. With the obtained results, approaches are settled down to either determine design parameters for final disposition whether for incineration, trituration, sanitary filler or recycling of some materials, and storage politics of the solid residuals that allow to determine the gathering frequency. The study concludes that it is necessary to improve the conditions of the residuals handling in some aspects, to provide the cleaning personnel of the equipment for gathering disposition and of security, minimum to carry out this work efficiently, and to maintain a control of all the dangerous waste, like sharp or polluted materials. In this way, an appreciable reduction is guaranteed in the impact on the atmosphere. (Author) [Spanish] El objetivo principal de esta investigacion es la caracterizacion de los residuos solidos. Se da tambien una descripcion del manejo de los desechos liquidos y gaseosos generados en hospitales, identificando la fuente donde se originan. Para lograr el objetivo propuesto se dividio el trabajo en tres etapas; la primera fue el planeamiento y la coordinacion con cada centro hospitalario

  4. Pumping systems characterization; Caracterizacion de los sistemas de bombeo

    Energy Technology Data Exchange (ETDEWEB)

    Torres Gutierrez, R. [Eficiencia Energetica, S.A. de C.V., Mexico, D. F. (Mexico)

    1995-12-31

    In this paper the characterization of the pumping systems is discussed, and an explanation is given of the need of evaluating in detail the possibility of implementing the frequency variators as an option for energy conservation, explaining how the simple use of the similarity or affinity laws lead to over-estimate the saving. [Espanol] En este articulo se describe la caracterizacion de los sistemas de bombeo y se explica la necesidad de evaluar en detalle la posibilidad de implementacion de variadores de frecuencia, como una alternativa para el ahorro de energia, explicando como el simple uso de las leyes de semejanza o afinidad llevan a sobre-evaluar los ahorros.

  5. Pumping systems characterization; Caracterizacion de los sistemas de bombeo

    Energy Technology Data Exchange (ETDEWEB)

    Torres Gutierrez, R [Eficiencia Energetica, S.A. de C.V., Mexico, D. F. (Mexico)

    1996-12-31

    In this paper the characterization of the pumping systems is discussed, and an explanation is given of the need of evaluating in detail the possibility of implementing the frequency variators as an option for energy conservation, explaining how the simple use of the similarity or affinity laws lead to over-estimate the saving. [Espanol] En este articulo se describe la caracterizacion de los sistemas de bombeo y se explica la necesidad de evaluar en detalle la posibilidad de implementacion de variadores de frecuencia, como una alternativa para el ahorro de energia, explicando como el simple uso de las leyes de semejanza o afinidad llevan a sobre-evaluar los ahorros.

  6. Preliminary Characterization of the Liquid Discharge of the Mexico Hospital; Caracterizacion Preliminar de la Descarga Liquida del Hospital Mexico

    Energy Technology Data Exchange (ETDEWEB)

    Hernandez Rojas, A

    2001-07-01

    constituye un grave problema a nivel nacional. En este trabajo se realiza una caracterizacion preliminar de la descarga liquida del Hospital Mexico. Para ello se analizaron diferentes puntos de vertido dentro de la institucion, ellos son : Lavanderia, cocina central, Laboratorio Clinico, Rayos X, Laboratorio de Biomasa, Morgue y la descarga final del hospital. Esto con el fin de conocer el manejo de los desechos liquidos en el centro de salud, la calidad sanitaria de estos vertidos y su influencia en las aguas crudas del Hospital Mexico en el cuerpo receptor. Para este estudio primero se coordino con el personal de cada departamento para conocer sobre el manejo y tipo de residuos liquidos que son descargados al sistema de tuberias. Posteriormente se realizaron las pruebas fisico-quimicas y biologicas con base en dos muestreos compuestos realizados los dias 26 de octubre y 4 de noviembre de 1998. Entre las pruebas realizadas se tienen: pH, DBO, DQO, SAAM, Grasas y Aceites, Temperatura, Nitrogeno y Coliformes Fecales, dependiendo de las caracteristicas de su punto de procedencia. Al final del estudio, se evaluaron los resultados obtenidos para cada punto de vertido estudiado y luego se analizo la influencia de estos focos sobre la calidad de las aguas crudas del hospital, las cuales descargan en una quebrada localizada al costado noroeste de las instalaciones. Los resultados obtenidos permiten conocer preliminarmente la caracterizacion de la descarga liquida del Hospital Mexico y lo catalogan como una fuente de contaminacion. El Hospital requiere de una planta de tratamiento biologica para aquellos vertidos biodegradables, y de un sistema de tratamiento quimico para tratar ese tipo de productos, que son utilizados en los procesos propios de cada departamento; ademas se requiere tomar en cuenta medidas de reduccion de contaminacion que disminuyan la cantidad de desechos desde la fuente. (Author)

  7. Caracterización molecular de aislamientos invasores colombianos de Streptococcus pneumoniae serotipo 5 recuperados entre 1994 y 2004.

    Directory of Open Access Journals (Sweden)

    Carolina Firacative

    2006-06-01

    Full Text Available Introducción. Streptococcus pneumoniae serotipo 5 es causa importante de enfermedad invasora en Colombia, donde se ha demostrado la circulación del clon 19-Colombia(5 susceptible a penicilina pero resistente a tetraciclina y a cloranfenicol. Objetivo. Establecer las relaciones genéticas de aislamientos invasores colombianos de S. pneumoniae serotipo 5 recuperados entre 1994 y 2004 con el clon 19-Colombia(5. Materiales y métodos. Se estudiaron 83 aislamientos que tenían datos de susceptibilidad a penicilina, vancomicina, ceftriaxona, eritromicina, trimetoprim sulfametoxazol, cloranfenicol y tetraciclina, de los cuales 29 fueron obtenidos de niños menores de cinco años. El patrón de restricción del ADN se determinó por electroforesis en gel de campo pulsado, usando la enzima Sma I. La similitud genética entre los aislamientos y el clon se estableció según los criterios de Tenover y utilizando el programa Fingerprinting II. Resultados. Todos los aislamientos se relacionaron con el clon 19-Colombia5 y se agruparon en el patrón electroforético A con 17 subtipos. El patrón A se estableció en 32 aislamientos (38,6%, el A8 en 18 (21,7% y el A5 en 10 (12%, los 15 patrones restantes agruparon los otros 23 aislamientos. Los 34 aislamientos resistentes a tetraciclina y cloranfenicol mostraron relación con los patrones electroforéticos A (n = 32, A16 (n = 1 y A28 (n = 1, caracterizados, al igual que el clon, por presentar una banda de 340 Kb. Conclusión. Estos resultados muestran la circulación continua en el país de aislamientos de S. pneumoniae serotipo 5 genéticamente relacionados con el clon 19-Colombia(5.

  8. Methods of scientific calculation applied to classic and quantum description of the vibrational dynamics of chaotic systems. Application to the HO2 system; Metodos de calculo cientifico aplicados a la caracterizacion clasica y cuantica de la dinamica vibracional de sistemas caoticas. Aplicacion al sistema molecular HO{sub 2}

    Energy Technology Data Exchange (ETDEWEB)

    Gonzalez Giralda, C.

    2005-07-01

    The main objective of this thesis is to search for points of correspondence between the classic and quantum behavior of the dynamics of non-rigid molecular system HO2 (Hidroperoxil Radix), and too, the study of the manifestation mode as the regularity than the ergodicity from the point of view of the classical and quantum mechanics laws. (Author)

  9. Asociación molecular entre los papilomavirus y el cáncer de cérvix Molecular association between papillomavirus and cervix cancer

    Directory of Open Access Journals (Sweden)

    Jorge Eliécer Ossa Londoño

    1996-04-01

    Full Text Available Se revisa la patogénesis del condiloma y el cáncer inducidos por los papilomavirus (PVH, que puede resumirse así: a través de microheridas en el epitelio, el virus infecta las células basa les y en el proceso de cicatrización se activa la proliferación celular con lo que se permite iniciar el ciclo de replicación viral; el producto del gen viral E7 se une a la proteína celular Rb, liberando el factor E2F que induce a la célula a entrar en el ciclo de división. El estado proliferativo debería ser contrarrestado por una respuesta apoptótica que es mediada, en este tipo de células, por la proteína p53. El gen viral E6 inactiva esta proteína con lo que se permite la aparición del condiloma por desequilibrio entre la proliferación y la apoptosis. En el contexto de una replicación celular activa e incontrolada y con la proteína p53 inactivada para cumplir sus funciones proapoptóticas y reparadoras, es muy alta la probabilidad de aparición de una célula maligna. Este panorama se hace más complejo cuando los virus, eventualmente, se integran al genoma celular (10 que es más frecuente en el PVH tipo 18. En este caso el gen regulador E2 se inactiva y consecuentemente aumentan las proteínas E6 y E7. A review is presented on the pathogenesis of condiloma and cancer induced by papillomavirus infection: through minimal epithelial wounds these viruses reach basal cells; cell proliferation is activated in the healing process thereby allowing the viral replication cycle to take place. The product of viral gen E7 joins Rb cell protein releasing the factor (E2F that induces cell division. Proliferation should be opposed by apoptosis mediated by cell protein p53 but viral gen E6 inactivates the latter leading to an imbalance between cell division and death. With the occurrence of active, uncontrolled cell division the likelihood of malignancy development becomes high.

  10. CARACTERIZACION MOLECULAR DE LOS HAPIOGRUPOS DE DNA MITOCONDRIAL EN LA ENFERMEDAD CELIACA

    OpenAIRE

    PARADA DAZA, ALEJANDRA CRISTINA

    2010-01-01

    La enfermedad celiaca (EC), es un desorden autoinmune intestinal crónico con un fuerte componente genético, asociado a genes HLA-002 o HLA-008. La prevalencia en Europa de la EC se estima en el 1%, sin embargo en América del Sur no hay una estimación de la prevalencia de EC y no se conoce si la étina se relaciona con la baja frecuencia de la enfermedad o simplemente es el reflejo del subdiagóstico en la zona. El análisis de la presencia de genes nativos se puede realizar a través de la búsque...

  11. Characterization of the permutations by block that have reversible one dimensional cellular automata; Caracterizacion de las permutaciones en bloque que representan automatas celulares unidimensionales reversibles

    Energy Technology Data Exchange (ETDEWEB)

    Seck Tuoh Mora, J. C. [Instituto Politecnico Nacional, Mexico, D. F. (Mexico)

    2001-06-01

    We present a review of reversible one dimensional cellular automata and their representation by block permutations. We analyze in detail the behavior of such block permutations to get their characterization. [Spanish] En el siguiente escrito se da una revision a la representacion y comportamiento de automatas celulares unidimensionales reversibles por medio de permutaciones en bloque. Hacemos un analisis detallado del comportamiento de dichas permutaciones para obtener su caracterizacion.

  12. Endostatin (EntreMed).

    Science.gov (United States)

    Grosios, K

    2000-07-01

    human endostatin at doses up to 300 mg/kg produced no toxic effects [317916]. Research presented at the 91st Annual Meeting of the AACR (San Francisco, April 2000), demonstrated that peritumoral administration of Endostatin, at concentrations 2000-fold less than that required to inhibit tumor progression in previously published reports using systemic dosing, significantly deters the development of a variety of tumors in mice [361584]. Other research presented at the meeting demonstrated a role for tropomysin as a molecular target for Endostatin [361680]. In August 1997, EntreMed and the NCI signed letters of intent to commence research collaborations for developing anti-angiogenic therapies, including Endostatin, in preclinical and clinical studies [258354], while in August 1998, EntreMed entered into an agreement with Covance Biotechnology Services for the production of Endostatin [304919]. In August 1999, Entremed and Cell Genesys entered a collaboration to combine Entremed's Endostatin genes with Cell Genesys's gene delivery system as a possible treatment for cancer [336909]. In December 1999, EntreMed signed an agreement with Chiron for the production of bulk Endostatin for phase II clinical trials [350397]. In April 1999, analysts at First Security Van Kasper predicted a US launch for Endostatin in 2004, with first-year revenues of US 320 million dollars, including 70 million dollars in royalties to EntreMed. European launch was predicted for 2005, with total revenues from Europe and the US for that year of US 760 milion dollars (160 million dollars royalties to EntreMed), rising to 1600 million dollars (335 million dollars royalties to EntreMed) in 2007 [370813].

  13. Characterization of the billow applied to Tuxpan, Veracruz; Caracterizacion del oleaje aplicada a Tuxpan, Veracruz

    Energy Technology Data Exchange (ETDEWEB)

    Rosales Sierra, Victor

    1999-07-01

    In this work, the criteria for the wave temporal and spectral statistical analysis were reviewed. These analysis are applied to the site Tuxpan, Veracruz, in the Mexican Gulf coast. In the temporal statistic analysis, the high (Rayleigh, Tayfun and Carter) and period (Bretchneider, Cavanie and Longuet-Higgins) theoretic probability distributions are compared with field data from Tuxpan. In the other hand, in the frequency domain analysis, the theoretic spectrums (Bretchneider-Mitsuyasu, Jonswap-Hasselmann, Pierson-Moscowitz, Neumann, ITTC, ISSC, TMA and Ochi-Hubble) are compared with the one obtained from Tuxpan measurements, then changes are made to some spectrums in order to better couple to field data. Finally, some recommendations are made to improve the wave data acquisition and analysis methods. From the study results, it's important to mention that the Tayfun high probability distribution and the Cavanie period probability distribution better fit Tuxpan field data. In the spectral analysis, the Bretchneider spectrum, modified by Mitsuyasu, better coupled to the spectrum obtained from Tuxpan field data. In the temporal statistical analysis, correct the mean level using the parabolic approximation, in order to eliminate the tidal and long period wave effects, it is recommended. For the registered individual wave calculus the zero up cross method was used. [Spanish] En este trabajo se revisan los criterios para el analisis estadisticos temporal y espectral del oleaje, mismos que son aplicados para la caracterizacion del oleaje en Tuxpan, Veracruz. En cuanto al analisis estadistico temporal, se comparan las distribuciones teoricas de probabilidad de altura de Rayleigh, Tayfun y Carter; y las de periodo de Bretchneider, Cavanie y Longuet-Higgins contra las resultantes de las mediciones en campo. Por otro lado y concerniente al analisis en el dominio de la frecuencia, se comparan los espectros teoricos de Bretchneider- Mitsuyasu, Jonswap-Hasselmann, Pierson

  14. Análisis de la Variabilidad Genética entre treinta accesiones de tarwi (Lupinus mutabilis Sweet usando marcadores moleculares ISSR

    Directory of Open Access Journals (Sweden)

    Michelle C. Chirinos-Arias

    2015-01-01

    Full Text Available Con el fin de realizar el análisis de variabilidad genética inter-accesión de treinta accesiones de tarwi (L. mutabilis Sweet pertenecientes al Banco de Germoplasma del Instituto Nacional de Innovación Agraria (INIA. Se extrajo el ADN de 300 plantas, se construyeron bulks, se estandarizó el protocolo de amplificación de los marcadores moleculares Inter Simple Sequence Repeat (ISSR, de los cuales se eligió a los más polimórficos y nítidos para corrida en gel de acrilamida. Encontrándose 255 bandas con 8 iniciadores ISSR. El análisis de la variabilidad genética con estos iniciadores comprobó una alta variabilidad genética de las muestras en estudio. Observándose también un polimorfismo relativamente alto para una especie autógama como L. mutabilis. Finalmente los fenogramas mostraron una relación con la ubicación geográfica, posiblemente debido al flujo génico in situ debido al intercambio o venta de semillas en ferias o mercados aledaños a la zona de colecta.

  15. Estructura genética e historia demográfica del Jaguar ( Panthera onca en Colombia: Contraste entre marcadores moleculares y datos craneométricos

    Directory of Open Access Journals (Sweden)

    M. Ruíz-García

    2001-07-01

    Full Text Available Se estudio la estructura genética de los jaguares en Colombia (n=49, e igualmente, se com-pararon los resultados moleculares obtenidos con otros 16 jaguares procedentes de Guatemala,Perú, Bolivia y zona central de la Amazonía brasileña. Para ello se emplearon 18 marcadores microsatélites (STRPs diseñados para gato doméstico. Estos marcadores fueron Fca 01, 08, 24,43, 45, 70, 94, 96, 126, 136, 176, 200, 225, 251, 290, 294, 391 y 506, localizados en losdiferentes cromosomas felinos. Mediante tests exactos utilizando cadenas de Markov y elmétodo de Fisher se determinó un fuerte exceso de homocigotos en todos los niveles jerárquicosanalizados, lo cual pone en evidencia la posible importancia del efecto Wahlund en esta especiey la no existencia de correspondencia con las subespecies morfológicamente propuestas en elpasado. Se calculó también el asignamiento poblacional de los jaguares analizados, a las dossubespecies de jaguares presentes en Colombia mediante el método de verosimilitud y con elmétodo basado en distancias con los procedimientos “as is” y “leave one out”.

  16. Entre/Plantas

    OpenAIRE

    Montoro Coso, Ricardo; Sonntag, Franca Alexandra

    2014-01-01

    La palabra Inter-és proviene etimológicamente de las palabras latinas inter y esse; y significa “lo que está-entre dos o más personas, o sea lo que las une pero también las separa”. Los prefijos inter- y entre-, en la mayor parte de los casos, describen estados o acciones ambiguas de los términos que preceden. De esta operación aditiva surgen maclas de vocablos; el inter-sticio como la “hendidura o espacio que media entre dos cuerpos o entre dos partes de un mismo cuerpo”; y así sucesivamente...

  17. The need of alkalinity determination in the characterization of rain; Necesidad de la determinacion de la alcalinidad en la caracterizacion de la lluvia

    Energy Technology Data Exchange (ETDEWEB)

    Pal Verma, Mahendra [Instituto de Investigaciones Electricas, Cuernavaca (Mexico)

    1998-01-01

    In this paper is presented the alkalinity determination of the carbonic species in the rain waters by the Gran titration method. The alkalinity values obtained by this method in low electric conductivity waters are fairly reliable. Also, the existing studies on the characterization of acid rains, are discussed. [Espanol] En este trabajo se presenta la medicion de la alcalinidad y la determinacion de las especies carbonicas en las aguas de lluvia por el metodo de la titulacion de Gran. Los valores de alcalinidad obtenidos por este metodo en las aguas de baja conductividad electrica son bastante confiables. Asimismo, se discuten los estudios existentes sobre la caracterizacion de la lluvia acida en la republica mexicana.

  18. AISLAMIENTO Y CARACTERIZACION DE UNA LEVADURA FLOCULANTE PARA PRODUCIR ETANOL DEL BANANO DE RECHAZO

    Directory of Open Access Journals (Sweden)

    CARLOS GUEVARA-BRAVO

    Full Text Available Fue aislada y caracterizada una cepa de levadura Saccharomycescerevisiae LEG-06, con características floculantes para fermentar jugo de banano extraído bajo condiciones básicas. Los rendimientos de etanol fueron comparados con levaduras comerciales y además fueron evaluados los efectos del pH y del agente neutralizante. Adicionalmente se evaluó el efecto sobre la eficiencia de 10 fermentaciones sucesivas usando la misma levadura. Finalmente, se escaló la fermentación a 40 L en reactor tubular con agitación mecánica y se determinaron los parámetros cinéticos de la levadura. Las condiciones ideales fueron: pH 5,5 utilizando ácido cítrico como neutralizante, 23,8 g/L de levadura, 14,5°Brix. La eficiencia estuvo entre 82-84% y el pH óptimo de floculación entre 5,5 y 6,0. La concentración de etanol obtenido en las mejores condiciones alcanzó el 7,5%. Estos resultados demuestran la levadura como la metodología usada, presentan las características adecuadas y deseadas para desarrollar un proceso a nivel de planta piloto para la producción de etanol a partir de banano de rechazo.

  19. CARACTERIZACION DE UN MINERAL DE COBRE EN ARGENTINA PARA LA PRODUCCION DE MATTE.

    Directory of Open Access Journals (Sweden)

    VANESA BAZÁN

    2011-01-01

    Full Text Available Argentina, posee minerales cuyas reservas la potencian para constituirse en un fuerte abastecedor regional. Actualmente, se han realizado proyectos de exploraciones y explotación de minerales de cobre que poseen una ley entre 0,5% y 0,8% generalmente libre de impurezas como Sb, As, Pb, Bi y Hg. [1, 2, 3, 4] Este hecho indicaría que puede existir un gran potencial para el desarrollo de la pirometalurgia del cobre, dado que hasta el momento no existen avances en este sentido. En este trabajo se presentan resultados de un estudio realizado sobre un mineral de baja ley de Cu, en el cual se identifi can sus fases mediante microscopía óptica, ensayos de fl otación contemplando diferentes condiciones, con el objetivo de obtener concentrados de distintas calidades. Finalmente, para comprender aspectos del proceso de obtención del cobre se realiza una simulación del proceso de fusión en el horno fl ash basado en balances de masa y energía.

  20. CARACTERIZACION DE LA PRODUCTIVIDAD PESQUERA DESARROLLADA EN LA COCHA JACINTO, RESERVA NACIONAL PACAYA SAMIRIA

    Directory of Open Access Journals (Sweden)

    Javier del Águila Chávez

    2011-12-01

    Full Text Available El presente estudio describe las características de la productividad pesquera por un periodo de cuatro años  en la “cocha Jacinto”. La “cocha Jacinto” está ubicada en la Reserva Nacional Pacaya Samiria (RNPS (coordenadas UTM E 0623314 y N 9495909, Loreto, Perú. Los datos fueron recolectados a partir de fichas de registro de pesca llenadas por el propio pescador. La productividad pesquera se estimó por el número de individuos con mayor captura, captura por unidad de esfuerzo (CPUE  y biomasa bruta según consumo (BBC. Los datos fueron digitados y analizados utilizando el programa Microsoft Excel v. 2000.Durante el periodo 2006 – 2009: a Los individuos con mayor captura fueron la “Carachama” (Fam. Loricaridae, “sardina” (Fam. Characidae, “Fasaco” (Fam. Erythrinidae y “Shuyo” (Fam. Erythrinidae; b con respecto a la CPUE: 0.16 kg/hora,  0.15 kg/hora, 0.38 kg/hora y 0.65 kg/hora; y c la BBC osciló entre 56.85 kg, 45.81 kg, 202.04 kg y  81.63 kg, según respectivo año. Las diferencias de la CPUE indican un probable incremento de la producción pesquera. Sin embargo se necesitan mayores estudios para evaluar las dinámicas de la producción pesquera y evaluar factores sociales.  Limitación a considerar es la calidad de los datos recolectados

  1. CARACTERIZACION DE LA PRODUCTIVIDAD PESQUERA DESARROLLADA EN LA COCHA JACINTO, RESERVA NACIONAL PACAYA SAMIRIA

    Directory of Open Access Journals (Sweden)

    Javier del Águila Chávez

    2011-12-01

    Full Text Available El presente estudio describe las características de la productividad pesquera por un periodo de cuatro años  en la “cocha Jacinto”. La “cocha Jacinto” está ubicada en la Reserva Nacional Pacaya Samiria (RNPS (coordenadas UTM E 0623314 y N 9495909, Loreto, Perú. Los datos fueron recolectados a partir de fichas de registro de pesca llenadas por el propio pescador. La productividad pesquera se estimó por el número de individuos con mayor captura, captura por unidad de esfuerzo (CPUE  y biomasa bruta según consumo (BBC. Los datos fueron digitados y analizados utilizando el programa Microsoft Excel v. 2000. Durante el periodo 2006 – 2009: a Los individuos con mayor captura fueron la “Carachama” (Fam. Loricaridae, “sardina” (Fam. Characidae, “Fasaco” (Fam. Erythrinidae y “Shuyo” (Fam. Erythrinidae; b con respecto a la CPUE: 0.16 kg/hora,  0.15 kg/hora, 0.38 kg/hora y 0.65 kg/hora; y c la BBC osciló entre 56.85 kg, 45.81 kg, 202.04 kg y  81.63 kg, según respectivo año. Las diferencias de la CPUE indican un probable incremento de la producción pesquera. Sin embargo se necesitan mayores estudios para evaluar las dinámicas de la producción pesquera y evaluar factores sociales.  Limitación a considerar es la calidad de los datos recolectados.

  2. CARACTERIZACION FISICOQUIMICA DEL MANGO COMUN (Mangifera indica L. DURANTE SU PROCESO DE MADURACION

    Directory of Open Access Journals (Sweden)

    VICTOR QUINTERO C

    Full Text Available El proceso de maduración del mango está gobernado bajo una serie de reacciones bioquímicas al interior del fruto que se caracterizan por cambios en la textura, color, en el contenido de azúcares, ácidos, aromas, entre otros. Las sustancias acumuladas durante el desarrollo se transforman de manera lenta y progresiva hasta que el fruto alcanza las condiciones de aroma y jugosidad que permita clasificarlo como maduro. Se realizó una cinética de maduración durante nueve días, determinando parámetros físicos y químicos como color en pulpa y en cáscara, textura, actividad de agua, sólidos solubles, pH y acidez titulable. Se modeló cinéticamente el comportamiento de cada una estas variables y se pudo determinar que los sólidos solubles tienen una tendencia explicada con un modelo de regresión multiplicativo y la actividad de agua con un modelo de regresión reciproco de X mientras el pH y la acidez con una ecuación de regresión de raíz cuadrada de X, de la misma manera el cambio de color en cáscara y en pulpa presento una regresión reciproca de X. Por último en el caso de la textura se observó y se ajustó modelos lineales tanto para cáscara como para pulpa.

  3. Entre monos y centauros

    Directory of Open Access Journals (Sweden)

    Serge Gruzinski

    2005-02-01

    Full Text Available    ¿Qué relación puede existir entre Ovidio, Tiziano y unos tlacuilo indios de la sierra otomí ? ¿Qué tienen en comun  el pintor mas famoso del siglo XVI , el veneciano Tiziano (+ 1576,  un poeta latino del primer siglo despues de Cristo, Publio Ovidio Nasón (-43/17 ,  y unos artistas indígenas anónimos del pueblo otomi de Ixmiquilpan?   Aunque la reunión de estos tres nombres parezca extraña y sorprendente, los hilos que los unen no son nada anecdóticos.  Permiten entender mejor la manera...

  4. Entre formigas e estrelas

    Directory of Open Access Journals (Sweden)

    Vinicius Prates

    2013-06-01

    Full Text Available Esta resenha apresenta o livro Reagregando o social: uma introdução à teoria do ator-rede, última obra do filósofo francês Bruno Latour publicada no Brasil. Nele, o autor se propõe a elaborar uma suma da crítica que faz aos conceitos usualmente aceitos de “social”, o que vem desenvolvendo ao longo dos últimos anos de produção intelectual. Neste processo ele criou a “Teoria-ator-rede”, que busca reestabelecer teoricamente as relações entre o que chama de mediadores “humanos” e “não-humanos”.

  5. Confrontación entre un agrupamiento a priori de germoplasma de papa Solanum tuberosum subespecie andigena y un agrupamiento no jerárquico

    Directory of Open Access Journals (Sweden)

    Bernal Ángela María

    2006-12-01

    Full Text Available

    Con el fin de establecer patrones de similitud entre las accesiones para facilitar la identificación de cruzamientos potenciales, se realizó el agrupamiento a priori de la Colección Central Colombiana de papa subespecie andigena por características de color de piel y carne del tubérculo. La necesidad de incluir otras variables de tubérculo y realizar una clasificación basada en métodos estadísticos aumentó con el tiempo y con la evolución de las técnicas multivariadas de datos. En este trabajo se realizó el agrupamiento no jerárquico de la Colección, mediante un análisis de partición que utiliza el algoritmo de k-medias, luego de la caracterización morfológica de 435 accesiones sólo por características del tubérculo. Al comparar ambos agrupamientos se encontró la no correspondencia entre uno y otro, así como la necesidad de mejorar la objetividad en la caracterización de recursos genéticos. Las caracterizaciones tuvieron lugar en el Centro de Investigación Tibaitatá de la Corporación Colombiana de Investigación Agropecuaria (Corpoica, en   Mosquera (Cundinamarca, donde se conserva la Colección Central Colombiana de papa.

  6. Entre grafos y bits

    Directory of Open Access Journals (Sweden)

    Carla Boserman

    2014-02-01

    Full Text Available Este texto se propone ahondar en las intersecciones de lo analógico y lo digital, en el encuentro de la baja y la alta tecnología. Tomando consciencia de la materialidad de ambas esferas para pensar desde ahí en objetos, prácticas de dibujo y documentación que puedan aportar otras formulaciones aplicables a métodos de investigación. Entre grafos y bits, diseccionaremos un objeto, el #relatograma, analizaremos su ecología y propondremos una reflexión acerca de su condición digital que genera paisajes por agregación #coreograma, explorando así su capacidad de ser reporte y aporte cognitivo. Between graphs and bits  Abstract This paper delves into the intersections of analogue and digital cultures, at the points at which low and high technology converge. While acknowledging the materiality of these two spheres, I aim to produce an enquiry into objects, drawings and documentation practices that can contribute to developing new research methods. Among graphs and bits, I will dissect one object: the #relatograma, in order to analyze its ecology and propose a critical reflection on its digital condition and its ability to produce aggregated landscapes, or what I define as #coreograma. I will thereby explore its ability to be share information and produce knowledge. Keywords: Material culture; research methods; digital objects; drawing; #relatograma.

  7. Design, construction and characterization of a rural solar furnace; Diseno, construccion y caracterizacion de un horno solar rural

    Energy Technology Data Exchange (ETDEWEB)

    Hernandez Luna, Gabriela

    2001-06-15

    centigrade, followed of the condition using 6 liters of oil, in which a maximum temperature of 115 centigrade was obtained and in the tests with 6 liters of water as load a maximum temperature of 95 centigrade was registered. In these tests the temperature of the oil surpasses 60 centigrade during an approximate period of 7 hours and is higher than 80 centigrade by a lapse of 5 hours. The water temperature is higher than 60 centigrade for a period of more than 5 hours and during 3 hours is higher than 80 centigrade. These results are satisfactory, because they assure the accomplishment of the process of baking inside the furnace. A calculation program was elaborated to implement the theoretical model of the concentration. This program reads the data of radiation intensity in the horizontal plane supplied by the weather station of the CIE and determines the incident radiation in the furnace collector. The theoretical model of the thermal behavior was implemented in another computer program; this program reads the data of the incident radiation in the collector of the furnace and the data of room temperature and calculates the temperature of the furnace as a time function. The model overestimates the temperature reached in the furnace, nevertheless reproduces qualitatively the thermal behavior of the same. In spite of the limitations of the theoretical model, this can be of utility in achieving the reproduction of the temperature of the load experimentally registered, through an effective coefficient of heat losses and an effective coefficient of heat capacity, characteristic of each one of the conditions of the test. [Spanish] Esta tesis presenta el diseno, construccion y caracterizacion de un horno solar tipo caja para su uso en comunidades rurales en la zona intertropical. El trabajo presentado en esta tesis parte del diseno opto-geometrico de un horno solar tipo caja propuesto por un entusiasta grupo de jovenes estudiantes (Acosta et al., 1996, Vazquez et al., 1998

  8. Comparação entre heparina de baixo peso molecular e heparina não fraccionada intravenosa no tratamento da embolia pulmonar — Uma meta-análise de estudos controlados randomizados

    Directory of Open Access Journals (Sweden)

    Daniel Quinlan

    2004-11-01

    Full Text Available RESUMO: O tratamento da embolia pulmonar aguda (EPA com heparina de baixo peso molecular não é consensual. Muitos clínicos continuam a utilizar a heparina não fraccionada por considerarem que o EPA apresenta maior risco do que a trombose venosa profunda (TVP e por admitirem insuficientes as provas de eficácia e segurança relativas à heparina de baixo peso molecular.É indiscutível a maior facilidade de utilização das heparinas de baixo peso molecular. O propósito desta meta-análise é comparar a eficácia e segurança de uma dose fixa subcutânea de heparina de baixo peso molecular com uma dose variável intravenosa de heparina não fraccionada. Foram incluídos ensaios clínicos com casos de EPA sintomático ou de EPA assintomático com TVP sintomática. A variável principal foi a recorrência de tromboembolismo venoso sintomático (incluindo EPA e TVP no final do tratamento (entre 5 e 14 dias; as variáveis secundárias foram a recorrência de tromboembolismo aos 3 meses, a mortalidade e a hemorragia major ou minor. No estudo comparativo com a heparina não fraccionada foram utilizadas 6 diferentes heparinas de baixo peso molecular, e a análise total envolveu mais de 1900 doentes repartidos por 12 estudos. Os resultados mostraram: • Redução do número de casos de recorrência de tromboembolismo venoso sintomático com a heparina de baixo peso molecular comparativamente à heparina não fraccionada - 14/1023 vs 22/928. • Redução do número de casos de recorrência de tromboembolismo venoso ao final de 3 meses, nos doentes tratados com heparina de baixo peso molecular - 30/988 vs 39/895. • Mortalidade semelhante nos 2 grupos terapêuticos, quer no final do tratamento quer ao terceiro mês - 14/1023 vs 11/928 e 46/988 vs 55/895, respectivamente. • A hemorragia major foi mais frequente no grupo tratado com heparina n

  9. Isotopic exchange between molecular hydrogen and liquid ammonia catalysed by alkali amides; Echange isotopique entre l'hydrogene moleculaire et l'ammoniac liquide catalyse par les amidures alcalins

    Energy Technology Data Exchange (ETDEWEB)

    Delmas, R [Commissariat a l' Energie Atomique, Saclay (France). Centre d' Etudes Nucleaires

    1968-06-15

    The catalytic action of alkali amides on the isotopic exchange between hydrogen and liquid ammonia has been reinvestigated. It was clear before this work that the reaction is homogeneous and first order with respect to the concentration of dissolved hydrogen, but the nature of the catalytic species was still subject to discussion. On one hand new precise kinetic measurements have been made with sodium, potassium, rubidium and cesium amide. On the other hand, the dissociation of these salts has been calculated with the help of the FUOSS-ONSAGER equation. If the rate of exchange is plotted as a function of the concentration of the free amide ion, a linear relationship is obtained. In our experimental conditions, primary salt effects are negligible and the concentration has to be used in the rate equations. This shows that only the free amide ion is acting as a catalytic species. Experiments on common ion effects and secondary salt effects support this conclusion. The results are in agreement with an associative mechanism. (author) [French] Une nouvelle etude de l'echange isotopique entre l'hydrogene et l'ammoniac liquide catalyse par les amidures alcalins a ete effectuee. II etait bien etabli avant le present travail que la reaction etait homogene et que sa vitesse etait du premier ordre par rapport a la concentration d'hydrogene dissous, mais la nature de l'espece catalytique etait encore controversee. De nouvelles mesures cinetiques precises ont ete faites avec les amidures de sodium, de potassium, de rubidium et de cesium. D'autre part, la dissociation de ces sels a ete calculee a l'aide de l'equation de FUOSS-ONSAGER. On constate que la vitesse d'echange est proportionnelle a la concentration de l'ion amidure libre. Dans nos conditions experimentales, les effets de sel primaires sont negligeables, l'equation de vitesse doit s'exprimer simplement en fonction des concentrations. Ceci indique que l'ion amidure libre est la seule espece catalytique. Des experiences d

  10. LIRA DE OURO E REVOLUÇÃO MOLECULAR: APROXIMAÇÕES ENTRE UM MOVIMENTO CULTURAL DE DUQUE DE CAXIAS E OS CONCEITOS DE FÉLIX GUATTARI

    Directory of Open Access Journals (Sweden)

    Cristiane Maria Medeiros Laia

    2017-03-01

    Full Text Available DOI: 10.12957/periferia.2016.27732A Sociedade Musical e Artística Lira de Ouro, que existe há 57 anos na cidade de Duque de Caxias – RJ, é trazida para estudo, como um exemplo dos movimentos culturais que ganham força nas periferias do Brasil nesses tempos, e despontam como espaços onde as diferenças, singularidades e alteridades de seus integrantes são valorizadas e trabalhadas. Algumas das características estruturais da Lira são apontadas como diferenciais responsáveis pelos anos em que a sociedade (rexiste ao contexto periférico em que se encontra, atuando como importante linha de fuga, produção cultural e espaço de vida social. Essas características são analisadas e uma aproximação da Lira de Ouro com os movimentos que Félix Guattari chama de Revolução Molecular é sugerida, considerando os aspectos revolucionários que ambos compartilham.

  11. CARACTERIZACION DE RIZOBACTERIAS PROMOTORAS DEL ENRAIZAMIENTO DE ESTACAS DE EUCALYPTUS GLOBULUS LABILL. : MECANISMOS DE ACCION Y FLUCTUACION POBLACIONAL

    OpenAIRE

    DIAZ PERALTA, KATY PAULINA; DIAZ PERALTA, KATY PAULINA

    2009-01-01

    Las plantaciones de Eucalyptus spp en Chile, son altamente valoradas en el mercado mundial, su producción se basa en la propagación vegetativa de plantas en viveros, a través de estacas y miniestacas; sin embargo, ex iste una variabilidad en el potencial del enraizamiento entre clones de especies e híbridos del género, lo cual no permite obtener el total de plantas en los programas de producción clonal. Diversos estudios han demostrado que bacterias rizosféricas denominadas bacterias promotor...

  12. Adsorption competition study between oxygenated compounds and hydrocarbons on molecular sieves; Etude de la competition d`adsorption entre les composes oxygenes et les hydrocarbures sur les tamis moleculaires

    Energy Technology Data Exchange (ETDEWEB)

    Kong Ming, L.

    1996-11-29

    The aim of this study is to determine the competitive behavior of methanol and l -hexene in an n-hexane solvent system using a 13-x and a molecular sieves as the adsorbent. Adsorption was carried out in liquid phase. Parameters such as concentration, flowrate, temperature and column, length were varied in order to assess their effects on the breakthrough curves. In methanol-n-hexane system, it was found that the concentration profiles of the breakthrough curves were not very much influenced by the parameters except for the amount of volume of feed processes. However, changes in the flowrate does not have a significant effect on the concentration profile. A higher flowrate, the profile assumes a more dispersive pattern which of course is expected due to lower contact time if internal diffusion is rate determining. In the case of l -hexane carries out at different temperatures and column lengths there were some differences in concentration profiles. This may be due to experimental difficulties in controlling the flowrate at the start of the experiment rather than inherent adsorption behavior. In the 3-component system, 1 -hexene breakthrough was very much earlier as compared to methanol. Desorption carried out at 383 k and with flowrate of 28{+-}l g/min and for 100 minutes for all cases showed little variation. Re-adsorption under various conditions showed marked reduction in the amount of feed processed. The breakthrough curves were simulated using an Institut Francais du Petrole (IFP) proprietary computer program which is based on selectivity and theoretical plates and which predicts very well for xylene separation. In the 1 -hexene-n-hexane system, the simulator predicted reasonably well in terms of bed volume processed, however, for the methanol-n-hexane system the simulator failed. For the program to be effective, some mathematical treatments needs to be done with respect to the handling of the numerical analysis. To describe the adsorption equilibrium, two

  13. CARACTERIZACION FENOTIPICA Y TIPIFICACION MOLECULAR DE CEPAS DE CRYPTOCOCCUS NEOFORMANS AISLADAS DE MUESTRAS CLINICAS EN HOSPITALES TERCIARIOS DEL SUR DE CHILE

    OpenAIRE

    BARRIA I., YOLANDA B.

    2012-01-01

    Criptococosis es una micosis sistémica oportunista causada por dos especies levaduriformes capsuladas, C. neoformans causan infecciones en individuos immunodeprimidos ptincipalmente y Criptococcus gattii lo hace tanto en immunocompetentes como en personas inmunodeprimidas. C. neoformans es comúnmente asociado a excretas de palomas mientras que la especie C. gattii es encontrado en especies arbóreas como eucaliptos, ficus y otras. C neoformcms se subdivide en dos variedades distintas neofor...

  14. Análise comparativa entre as metodologias de PCR metilação-específica (MSP, Southern blot (SB e FISH utilizadas no diagnóstico genético molecular de pacientes com suspeita clínica das síndromes de Prader-Willi ou Angelman

    Directory of Open Access Journals (Sweden)

    Bruna Oliveira

    2016-08-01

    Full Text Available Introdução: Prader-Willi (SPW e Angelman (SA são síndromes clinicamente distintas, causadas pela perda de expressão de genes na região cromossômica 15q11.2-q13, de origem paterna ou materna, respectivamente. Ambas compartilham os mesmos métodos diagnósticos. Nossos objetivos foram: a analisar por PCR metilação-específica (MSP pacientes com suspeita clínica de SPW/SA; b comparar resultados de diferentes metodologias de diagnóstico molecular; c aplicar a técnica MSP na rotina assistencial de pacientes encaminhados ao Serviço de Genética Médica/Hospital de Clínicas de Porto Alegre (SGM/HCPA. Métodos: Foram analisados 123 pacientes com suspeita clínica de SPW (n = 71 ou SA (n = 52 por MSP. Desses, 79 possuíam análise prévia por hibridação in situ fluorescente (FISH e/ou Southern blot (SB. Resultados: Foram detectados 21 casos positivos – 15 de SPW (12,19% e 6 de SA (4,88%. Nove pacientes tiveram etiologia molecular determinada, sendo sete com diagnóstico de SPW (quatro dissomias uniparentais – UPD15 materna – e três deleções na região 15q11-13 e dois com diagnóstico de SA (um com UPD15 paterna e um com deleção na região 15q11-13. Foram observados resultados equivalentes entre MSP e SB e resultados discrepantes entre MSP e FISH (n = 4. Foram padronizados dois protocolos de MSP para confirmação dos resultados e controle interno de qualidade. Conclusão: O perfil de detecção de cada técnica varia de acordo com o mecanismo etiológico presente. A análise por MSP detecta alterações no padrão de metilação geradas por deleção, UPD e defeitos de imprinting, sem identificar o mecanismo etiológico responsável. Contudo, mostrou ser eficiente para confirmação do diagnóstico clínico e screening dos pacientes com suspeita clínica sugestiva de SPW e SA. Diante de resultados positivos, é importante a identificação do mecanismo molecular subjacente para correlação genótipo-fenótipo e determina

  15. El periodista, entre el Poder

    Directory of Open Access Journals (Sweden)

    JL Dader

    2014-10-01

    Full Text Available El periodismo se debate, desde sus orígenes, entre la reproducción servil de versiones interesadas o la distorsión de propio cuño, por conocimiento insuficiente de una realidad que sólo puede entrever. Los poderes que amenazan la independencia periodística no han hecho más que crecer o aumentar su habilidad con el paso del tiempo. Surgido como ‘oficio de esclavos’ en la época romana, muchos indicadores actuales parecen retornarle al punto de partida: relaciones públicas estratégicas a gran escala, auge de los ‘spin doctors’, extorsión descarnada en las democracias más débiles y populismo de las redes sociales, entre otros. Todo ello, unido o alentado por la degradación interna y el desaliento de la propia institución periodística incapaz de distanciarse de todas esas fuerzas. Su respuesta no puede ser de alianza o competencia con los poderes que la circundan, sino de hábil distanciamiento para moverse entre todos ellos sin dejar de ejercer la vigilancia que los ciudadanos siguen necesitando de su ejercicio profesional.

  16. Effets Josephson generalises entre antiferroaimants et entre supraconducteurs antiferromagnetiques

    Science.gov (United States)

    Chasse, Dominique

    L'effet Josephson est generalement presente comme le resultat de l'effet tunnel coherent de paires de Cooper a travers une jonction tunnel entre deux supraconducteurs, mais il est possible de l'expliquer dans un contexte plus general. Par exemple, Esposito & al. ont recemment demontre que l'effet Josephson DC peut etre decrit a l'aide du boson pseudo-Goldstone de deux systemes couples brisant chacun la symetrie abelienne U(1). Puisque cette description se generalise de facon naturelle a des brisures de symetries continues non-abeliennes, l'equivalent de l'effet Josephson devrait donc exister pour des types d'ordre a longue portee differents de la supraconductivite. Le cas de deux ferroaimants itinerants (brisure de symetrie 0(3)) couples a travers une jonction tunnel a deja ete traite dans la litterature Afin de mettre en evidence la generalite du phenomene et dans le but de faire des predictions a partir d'un modele realiste, nous etudions le cas d'une jonction tunnel entre deux antiferroaimants itinerants. En adoptant une approche Similaire a celle d'Ambegaokar & Baratoff pour une jonction Josephson, nous trouvons un courant d'aimantation alternee a travers la jonction qui est proportionnel a sG x sD ou fG et sD sont les vecteurs de Neel de part et d'autre de la jonction. La fonction sinus caracteristique du courant Josephson standard est donc remplacee.ici par un produit vectoriel. Nous montrons que, d'un point de vue microscopique, ce phenomene resulte de l'effet tunnel coherent de paires particule-trou de spin 1 et de vecteur d'onde net egal au vecteur d'onde antiferromagnetique Q. Nous trouvons egalement la dependance en temperature de l'analogue du courant critique. En presence d'un champ magnetique externe, nous obtenons l'analogue de l'effet Josephson AC et la description complete que nous en donnons s'applique aussi au cas d'une jonction tunnel entre ferroaimants (dans ce dernier cas, les traitements anterieurs de cet effet AC s'averent incomplets). Nous

  17. Biogeographic analysis of Crocidiinae (Diptera, Bombyliidae: finding congruence among morphological, molecular, fossil and paleogeographical data Análise Biogeográfica de Crocidiinae (Diptera, Bombyliidae: encontrando congruência entre dados morfológicos, moleculares, fósseis e paleogeográficos

    Directory of Open Access Journals (Sweden)

    Carlos José Einicker Lamas

    2007-09-01

    Full Text Available Biogeographic studies dealing with Bombyliidae are rare in the literature and no information is available on its origin and early diversification. In this study, we found evidence from molecular phylogeny and from fossil record supporting a Middle Jurassic origin of the Bombylioidea, taken as a starting point to discuss the biogeography and diversification of Crocidiinae. Based on a previously published phylogenetic hypothesis, we performed a Brooks Parsimony Analysis (BPA to discuss the biogeographical history of Crocidiinae lineages. This subfamily is mostly distributed over arid areas of the early components of the Gondwanaland: Chile and southern Africa, but also in southwestern Palaearctic and southwestern Nearctic. The vicariant events affecting the Crocidiinae biogeography at the generic level seems to be related to the sequential separation of a Laurasian clade from a Gondwanan clade followed by the splitting of the latter into smaller components. This also leads to a hypothesis of origin of the Crocidiinae in the Middle Jurassic, the same period in which other bombyliid lineages are supposed to have arisen and irradiated.Estudos biogeográficos sobre os Bombyliidae são raros na literatura e não há nenhuma informação sobre sua origem e diversificação inicial. Neste estudo encontramos evidências de filogenias moleculares e de registros fósseis suportando a origem dos Bombylioidea no Jurássico Médio. Esse é o nosso ponto de partida para discutir a biogeografia e diversificação de Crocidiinae. A partir de uma hipótese filogenética previamente publicada, realizamos uma Análise de Parcimônia de Brooks (BPA para discutir a história biogeográfica das linhagens de Crocidiinae. Esta subfamília está distribuída principalmente por áreas áridas dos antigos componentes do supercontinente gondwanico: Chile e Sul da África, além do sudoeste da região Paleártica e sudoeste da região Neártica. Os eventos vicariantes que

  18. Molecular diversity among domestic guinea-pigs (Cavia porcellus and their close phylogenetic relationship with the Andean wild species Cavia tschudii Diversidad molecular entre cuyes domésticos (Cavia porcellus y su relación filogenética cercana con la especie silvestre andina Cavia tschudii

    Directory of Open Access Journals (Sweden)

    ÁNGEL E SPOTORNO

    2004-06-01

    . tschudii (promedio de distancias K2P = 3,2 %; los mejores árboles tenían 609 pasos (CI = 0,796; Índice de Apoyo de Bremer (SI = 28, y un _Ln = 4.419,52; con apoyos de remuestreo de 100 % y 97 % respectivamente. Dicho clado también apareció en el análisis cladístico de los aminoácidos correspondientes, apoyado por tres sustituciones y 96 % remuestreo. Cuando el nodo de C. aperea fue forzado a unirse al de C. porcellus, estos árboles fueron consistentemente más largos, menos probables y robustos, y con menos caracteres definitorios que el óptimo. Todas las secuencias de C. porcellus se agruparon también en un nodo definido por 15 sustituciones. El subnodo con animales de mercados de ciudad, tiendas de mascota y laboratorios se caracterizó por cuatro sustituciones (una no silenciosa, SI = 7 y 91 % remuestreo. Los C. porcellus sudamericanos, llamados "criollos" por los criadores locales, son más diversos. Probablemente, un clado del sur del Perú y Chile representa un linaje precolombino. La distancia K2P promedio entre C. tschudii y aperea fué más bien grande, 7,7 %. Cavia apareció como un nodo robusto (100 % remuestreo. Estos resultados indican que C. tschudii es la especie más cercanamente relacionada a C. porcellus.

  19. Entre palabra, escritura e imagen

    Directory of Open Access Journals (Sweden)

    José Sánchez Parga

    2015-01-01

    Full Text Available Plantea el autor que, hace quinientos años, cuando se produjo el encuentro entre la cultura europea y las americanas junto con la conquista y la dominación colonial se instauró un régimen de comunicación en el que se reprodujo una situación de incomunicación y transcomunicaciones hasta ahora existentes. Se refiere el autor también a la violencia verbal y la ley del silencio, a lo que se entiende por mundo andino, a la comunicación como intercambio, la tradición oral-galaxia radial, la dominación gráfica, la Biblia-Gramática- leyes de Indias, Otavalo, quema de papeles, Guamán Poma, el imperialismo de la imagen, destrucción de ídolos, imagen cristiana colonizadora, imperialismo de la imagen, resistencia cultural, importancia de la virgen y el neocolonialismo electrónico.

  20. Entre contener y ser contenido

    Directory of Open Access Journals (Sweden)

    Jorge Morales Meneses

    2016-08-01

    Full Text Available El presente artículo propone una nueva manera de entender los elementos comunes en la formación y el hacer del diseño y de la arquitectura, posibilitando un pensar común y un coactuar en diversas escalas de intervención, necesarias para el manejo de la complejidad del paisaje contemporáneo. La convicción de un pensar común entre ambas disciplinas permite explorar un marco filosófico que incluye a pensadores tan trascendentales como Aristóteles, Kant y Heidegger, estableciendo un orden de pensamiento que los relaciona y sitúa. En momentos en que el territorio está siendo visible y negativamente afectado por elementos no pensados o que fueron imaginados separadamente, este artículo propone una mirada que le dé sentido de totalidad a las acciones del diseño y de la arquitectura, como elementos que permanentemente se contienen en otros de diferente escala, pero que siempre están vinculados. Reconocer el paisaje físico y mental, tangible e intangible que contiene al diseño y a la arquitectura contribuirá a establecer un marco de acción donde todos los elementos construidos por el ser humano puedan tener un rol específico y una escala asumida, e intercomprenderse para mejor utilización de los recursos, disminuir el impacto ambiental y contribuir a un orden social mejor interpretado por los objetos, espacios y sus representaciones.

  1. Synthesis and electrochemical characterization of palladium-based cathode catalysts, resistant to the presence of methanol; Sintesis y caracterizacion electroquimica de catalizadores catodicos base paladio, resistentes a la presencia de metanol

    Energy Technology Data Exchange (ETDEWEB)

    Salvador, Jose J. [Centro de Investigacion y de Estudios Avanzados del IPN, Mexico D.F. (Mexico)] e-mail: jsalvador@cinvestav.mx; Collins, Virginia H. [Centro de Investigacion en Materiales Avanzados, Chihuahua, Chihuahua (Mexico); Solorza Feria, Omar [Centro de Investigacion y de Estudios Avanzados del IPN, Mexico D.F. (Mexico)

    2009-09-15

    This work presents the synthesis and characterization of palladium-based electrocatalysts (PdSn and PdPtSn) prepared with the salt-reduction method for oxygen reduction reaction (ORR). The compounds obtained are characterized by sweep electron microscopy, electron transmission microscopy and x-ray diffraction of powder. The electrocatalysts obtained had particle sizes less than 10 nm. The evaluation of the catalytic activity of the catalysts was performed using cyclic voltametry and rotating disc electrode. These experiments were conducted in an H{sub 2}SO{sub 4} 0.5 M solution with different methanol concentrations. The presence of methanol improved the catalytic activity of PdSn, but did not show any effect on the PdPtSn alloy. The performance of the DMFC mono cell using PdPtSn as a cathode showed a potential of 10 mW cm{sup -2} at 50 degrees Celsius. [Spanish] En este trabajo se presenta la sintesis y caracterizacion de electrocatalizadores de base Paladio (PdSn y PdPtSn) preparados mediante el metodo de reduccion de sales, para la reaccion de reduccion de oxigeno (RRO). Los compuestos obtenidos se caracterizaron por microscopia electronica de barrido, microscopia electronica de transmision y difraccion de rayos X de polvos. Los electrocatalizadores obtenidos presentaron un tamano de particula menores a 10 nm. La evaluacion de la actividad catalitica de los catalizadores se llevo a cabo mediante voltametria Ciclica y electrodo de disco rotatorio, estos experimentos fueron realizados en una solucion de H{sub 2}SO{sub 4} 0.5 M con diferentes concentraciones de metanol. La presencia de metanol mejoro la actividad catalitica de PdSn, pero no mostro ningun efecto sobre la aleacion PdPtSn. El desempeno de la monocelda de DMFC usando como catodo PdPtSn, mostro una potencia de 10 mW cm{sup -2} a 50 grados centigrados.

  2. Synthesis and characterization of RUM catalysts (M=SE,MO,W,SN) applied in ORR for a PEMFC fuel battery; Sintesis y caracterizacion de catalizadores RUM (M=SE,MO,W,SN) aplicados en la RRO para una pila de combustible PEMFC

    Energy Technology Data Exchange (ETDEWEB)

    Ezeta-Mejia, A.; Arce Estrada, E.M. [Instituto Politecnico Nacional, Mexico, D.F. (Mexico)]. E-mail: araceli-ezeta@hotmail.com; earce@ipn.mx

    2009-09-15

    baja temperatura y ofrecen una alta combinacion entre densidad de potencia y alta eficiencia en la conversion de energia, lo que las hace adecuadas para aplicaciones portatiles. Sin embargo, la reaccion de reduccion de oxigeno, RRO, que se lleva a cabo en el catodo de la pila, juega un papel determinante debido a que es la reaccion limitante del proceso, por lo que se requiere el empleo de electrocatalizadores mas eficientes. El electrocatalizador optimo para esta reaccion es el Pt, pero debido a su costo elevado se han tenido que buscar electrocatalizadores alternativos que conjuguen una alta actividad, estabilidad y bajo costo. Muchas investigaciones han mostrado que los catalizadores binarios base Pt tales como Pt-M (M= Co, Fe, etc.) presentan una buena actividad electrocatalitica para la RRO; otros estudios demuestran que los catalizadores base Ru (RuSe, RuSe,Mo, RuSeRh) tambien poseen una adecuada actividad para esta reaccion. En este estudio, se reporta la sintesis por aleado mecanico a diferentes tiempos de molienda (0, 20 y 40 h) de electrocatalizadores nanoparticulados de tipo RuPt{sub x}M (x=0, 0.6% y M=Se,Mo,W,Sn). Los materiales sintetizados por aleado mecanico se caracterizaron por microscopia electronica de barrido y por difraccion de rayos X, obteniendose particulas aglomeradas y dispersas entre 1 y 30 {mu}m. La caracterizacion electrocatalitica se llevo a cabo mediante las tecnicas de VC y EDR en una solucion de H{sub 2}SO{sub 4} 0.5 M a temperatura ambiente. Los sistemas presentan un orden de reaccion de 1, respecto a la RRO y una transferencia global multielectronica de 4e{sup -} para la formacion de agua. Se realizo una comparacion de la actividad electrocatalitica en presencia y ausencia de Pt, mostrando que el Pt incrementa la actividad catalitica de los materiales en al menos un orden de magnitud.

  3. Patpong, entre sexe et commerce.

    Directory of Open Access Journals (Sweden)

    Sébastien Roux

    2010-03-01

    Full Text Available Le tourisme dit « sexuel » est aujourd’hui décrié comme une forme de tourisme international immoral, un dysfonctionnement grave de la mondialisation appelant une réaction politique contre « l’exploitation sexuelle » dont seraient victimes des millions de femmes et d’enfants. Pourtant, derrière l’apparente évidence du « tourisme sexuel » comme expression de sens commun, rares sont les enquêtes qui explicitent la réalité concrète des échanges prostitutionnels. En adoptant une démarche ethnographique, l’article décrit le fonctionnement de Patpong, un quartier rouge de Bangkok dédié à une clientèle internationale. Par la description des offres disponibles, des revenus générés, des codes et des pratiques, la complexité de l’espace réapparaît. Il s’agit de donner à voir la réalité des échanges pour interroger l’articulation entre commerce et sexualité. L’analyse ethnographique du tourisme sexuel permet ainsi de souligner la diversité des pratiques et de rappeler que les formes les plus visibles — et les plus commentées — d’échanges prostitutionnels éclipsent trop souvent une pluralité d’expériences qui participe pourtant au succès de ces ruelles mondialement connues. So-called sex tourism is condemned as an immoral form of international tourism, a serious failure of globalization requiring political action against the “sexual exploitation” suffered by millions of women and children. Yet behind the common and seemingly evident understanding of “sexual tourism,” few studies have focused on the actual reality of such relations. Based on an ethnographic study, this article presents the structure of Patpong, a red-light district of Bangkok dedicated to international tourism. First, the article aims to briefly present the historical development of Patpong. This peculiar space is intrinsically linked to sex tourism, as these world-renowned streets expanded since the mid-60s to

  4. Floridablanca entre la modernidad y la posmodernidad

    OpenAIRE

    Senatore, María Ximena

    2007-01-01

    Este artículo se centra en los diálogos entre el pasado y el presente creados en el marco de la modernidad y de la posmodernidad. La arqueología como práctica social puede ser entendida como un diálogo pasado-presente. Floridablanca es una historia, un sitio, una experiencia, una idea, una utopía. Es también un punto de encuentro entre modernidad y posmodernidad. El objetivo de este trabajo es presentar ciertas reflexiones sobre los diálogos pasado-presente que crean, transforman y reproducen...

  5. Synthesis and characterization of PdAg as a catalyst for oxygen reduction reaction in acid medium; Sintesis y caracterizacion de PdAg como catalizador para la reaccion de reduccion de oxigeno en medio acido

    Energy Technology Data Exchange (ETDEWEB)

    Martinez-Casillas, D. C.; Vazquez-Huerta, G.; Solorza-Feria, O. [Centro de Investigacion y de Estudios Avanzados del IPN, Mexico D.F. (Mexico)]. E-mail: dcmartinez@cinvestav.mx

    2009-09-15

    This work presents the synthesis of the binary compound PdAg and the electrochemical characterization for oxygen reduction reaction (ORR) in acid medium. The catalyst is obtained from the reduction of Pd(NO{sub 3}){sub 2}·2H{sub 2}O and AgNO{sub 3} with NaBH{sub 4} in THF. The synthesized compound was physically characterized with transmission electron microscopy (TEM), sweep electron microscopy (SEM) and x-ray diffraction (XRD) of powder. Electrochemical studies were conducted to determine the catalytic activity and intrinsic properties of the PdAg material for the ORR in acid medium using cyclic voltamperometry (CV), rotary disc electrode (RDE) and electrochemical impedance spectroscopy (EIS) in a solution of H{sub 2}SO{sub 4} 0.5 M at 25 degrees Celsius. The electrochemical current-potential responses were compared to those of palladium and platinum. The kinetic results showed an increase in the performance of the bimetallic electrocatalyst containing Ag as compared to pure Pd, but less than that obtained with nanometric Pt. The Tafel slopes obtained are roughly120 mV dec-1, similar to that reported for Pt and Pd and for other Ru-based electrocatalysts. [Spanish] En este trabajo se presentan la sintesis del compuesto binario PdAg y su caracterizacion electroquimica para la reaccion de reduccion de oxigeno (RRO) en medio acido. El catalizador se obtuvo a partir de la reduccion de Pd(NO{sub 3}){sub 2}·2H{sub 2}O y AgNO{sub 3} con NaBH{sub 4} en THF. El compuesto sintetizado se caracterizo fisicamente por microscopia electronica de transmision (MET), microscopia electronica de barrido (MEB) y difraccion de rayos X (DRX) de polvos. Se realizaron estudios electroquimicos para determinar la actividad catalitica y las propiedades intrinsecas del material de PdAg para la reaccion de reduccion de oxigeno (RRO) en medio acido, utilizando las tecnicas de voltamperometria ciclica (VC), electrodo disco rotatorio (EDR) y espectroscopia de impedancia electroquimica (EIE), en

  6. Synthesis and characterization of cobalt oxide and titanium mixtures using mechanical alloying and its response to oxygen reduction; Sintesis y caracterizacion de mezclas de oxidos de cobalto y titanio por aleado mecanico y su respuesta para la reduccion de oxigeno

    Energy Technology Data Exchange (ETDEWEB)

    Basurto S, R.; Bonifacio-Martinez, J.; Fernandez, S.M [Instituto Nacional de Investigaciones Nucleares, Ocoyoacac, Estado de Mexico (Mexico)]. E-mail: rafael.basurto@inin.gob.mx

    2009-09-15

    The synthesis of Co{sub 3}O{sub 4} and CoTiO{sub 3} oxides was conducted using mechanical alloying and combustion. Co{sub 3}O{sub 4} used was obtained using a SPEX ball mill with cobalt nitrate, Co(NO{sub 3})36H{sub 2}O plus urea, CH{sub 4}N{sub 2}O, in a molar ratio of 1:1 and a ball weight ratio of 1:4 with grinding times of 2.5 hours in an argon atmosphere. The material obtained after alloying underwent combustion at 400 degrees Celsius and 500 degrees Celsius, obtaining oxides of mixed cobalt valence. This material was mixed with TiO{sub 2} with a weight ratio of 1:1 and was mechanically alloyed with a ball weight ratio of 1:8; grinding was performed for 2.5 hours in argon atmosphere and it underwent combustion at 800 degrees Celsius. Characterization was performed using x-ray diffraction, low-vacuum sweep electron microscopy and EDS. The electrochemical performance was obtained in a galvanostat-potentiostat (Princenton Applied Research modelo 273). Both materials present electrocatalytic activity for oxygen reduction reaction in alkaline medium. [Spanish] La sintesis de los oxidos: Co{sub 3}O{sub 4} y CoTiO3 se realizo por la tecnica de aleado mecanico y combustion. El Co{sub 3}O{sub 4} utilizado, se obtuvo por con un molino de bolas SPEX, utilizando nitrato de cobalto, Co(NO{sub 3})36H{sub 2}O mas urea, CH{sub 4}N{sub 2}O, en una relacion molar 1:1.y una relacion en peso de bolas de 1:4 con tiempos de molienda de 2.5 horas, en atmosfera de argon, al termino del aleado el material obtenido se llevo a combustion a 400 grados centigrados y 500 grados centigrados, obteniendose el oxido de valencia mixta de cobalto. Este material se mezclo con TiO{sub 2}, en una relacion en peso de 1:1 y se aleo mecanicamente, con una relacion en peso de bolas de 1:8, por 2.5 horas de molienda en atmosfera de argon y llevandolo a combustion a 800 grados centigrados. La caracterizacion se hizo por: Difraccion de Rayos X, Microscopia Electronica de Barrido de Bajo Vacio y EDS El

  7. Responsabilidad extracontractual y contractual: barrera entre ambas

    Directory of Open Access Journals (Sweden)

    González Hernández, Rut

    2013-01-01

    Full Text Available La finalidad que persigue el sistema de responsabilidad civiles el resarcimiento del daño causado con independencia de que proceda la responsabilidad contractual o la extracontractual, coexistiendo ambas en nuestro ordenamiento jurídico y resultando en ocasiones complicado discernir la frontera entre una y otra.

  8. Magnetismo Molecular (Molecular Magentism)

    Energy Technology Data Exchange (ETDEWEB)

    Reis, Mario S [Universidade Federal Fluminense, Brasil; Moreira Dos Santos, Antonio F [ORNL

    2010-07-01

    The new synthesis processes in chemistry open a new world of research, new and surprising materials never before found in nature can now be synthesized and, as a wonderful result, observed a series of physical phenomena never before imagined. Among these are many new materials the molecular magnets, the subject of this book and magnetic properties that are often reflections of the quantum behavior of these materials. Aside from the wonderful experience of exploring something new, the theoretical models that describe the behavior these magnetic materials are, in most cases, soluble analytically, which allows us to know in detail the physical mechanisms governing these materials. Still, the academic interest in parallel this subject, these materials have a number of properties that are promising to be used in technological devices, such as in computers quantum magnetic recording, magnetocaloric effect, spintronics and many other devices. This volume will journey through the world of molecular magnets, from the structural description of these materials to state of the art research.

  9. Sinergias entre Luxemburgo, ACNUR y Skype

    OpenAIRE

    Bertout, Antoine; Bourcy, Marc de; Faisal, Mohammad

    2011-01-01

    Una reciente asociación estratégica entre ACNUR, el Gobierno de Luxemburgo y el proveedor de software para comunicaciones Skype permite al personal de ACNUR en zonas de condiciones de vida difíciles mantenerse en contacto con sus familiares y amigos. Los socios evalúan de qué forma podría adaptarse la tecnología para otras organizaciones humanitarias.

  10. A desnecessidade do trabalho entre pescadores artesanais

    Directory of Open Access Journals (Sweden)

    Cristiano Wellington Norberto Ramalho

    2015-04-01

    Full Text Available As relações socioculturais e econômicas, entre alguns grupos de pescadores artesanais, não colocam como entes antagônicos trabalho e tempo livre. Do contrário, tais relações celebram aproximações entre saber-fazer pesqueiro, lazer e vida, formando e conformando um todo societário. Inseridos nesse quadro, estão os pescadores artesanais do mar-de-fora da praia de Suape, no município do Cabo de Santo Agostinho, litoral sul de Pernambuco, distante 50 km de Recife. Este artigo busca desvelar a mencionada moral do trabalho e do tempo livre no fazer cotidiano de pescadores dessa Praia, com base na pesquisa etnográfica e na história de vida de 13 pescadores. No geral, identificou-se que há uma moral do trabalho que se confunde à moral do tempo livre, pois o cerceamento de uma delas representa limites à outra. Assim, para esses homens, definir o que é um ser liberto ou cativo liga-se ao encontro indissociável, em termos práticos e simbólicos, entre as referidas morais, o que é essencial para classificar o fazer-se pescador artesanal em seu sentido pleno fundamentado na desnecessidade do trabalho.

  11. Molecular hematology

    National Research Council Canada - National Science Library

    Provan, Drew; Gribben, John

    2010-01-01

    ... The molecular basis of hemophilia, 219 Paul LF Giangrande 4 The genetics of acute myeloid leukemias, 42 Carolyn J Owen & Jude Fitzgibbon 19 The molecular basis of von Willebrand disease, 233 Luciano Baronc...

  12. Para tener entre manos una revista

    OpenAIRE

    Gabriel Giannone

    2017-01-01

    Consideramos importante rescatar el trabajo colectivo y acumulado que precede y sucede a la labor de intermediación académica que realiza una revista. Para ello recordamos una clásica frase prologal: el texto que usted tiene en sus manos. Con cierta ironía, porque quizás muy pocos de los lectores puedan tener entre manos y oler el papel impreso de Chasqui. Desde sus pantallas, sus tablets o sus teléfonos la intención es que se comprenda este número como un solo cuerpo. Y al mismo tiempo, como...

  13. Prototype study of characterization of the impact that produces the diffuser of an industrial discharge into the sea water; Estudio prototipo de caracterizacion del impacto que produce el difusor de una descarga industrial sobre el medio marino

    Energy Technology Data Exchange (ETDEWEB)

    Ortiz Gallarza, S. M.; Gil Zurita, A.; Garcia Hernandez, R.; Vergara Mendez, S.; Garcia Leal, M. L. [Universidad Autonoma Metropolitana, Mexico, D.F. (Mexico)

    2000-09-01

    impact. [Spanish] Para establecer limites maximos permisibles de contaminantes descargados en el mar por vertimientos antropogenicos, las autoridades involucradas en la proteccion y reglamentacion ambiental han fijado caracteristicas particulares de descarga a cada empresa. Ademas de cuidar que no se excedan los niveles establecidos, debe evaluarse el efecto de estas sustancias sobre el medio. En este contexto, se realizan estudios interdisciplinarios integrales de caracterizacion del impacto en el medio marino a causa de las industrias. Una de ellas, la cual vierte al litoral noroeste del golfo de Mexico mediante un difusor submarino, solicito un primer estudio de este genero. En este estudio prototipo se efectuaron estimaciones fisicas, quimicas, biologicas y geologicas en una red de 49 estaciones en seis transectos posicionados a bordo de una embarcacion y con teodolitos desde la costa a cinco niveles (superficie, 4, 8, 12 y 16 m de profundidad) y durante lluvias, secas y nortes. Se determinaron metales pesados en agua, sedimentos, organismos y muestras combinadas de la descarga. Se relacionaron mediciones continuas de corrientes, salinidad y temperatura en las boquillas del difusor a partir de registros de dos corrientimetros S4 InterOcean. Con vuelos en helicopteros se registraron las variaciones de desplazamiento de la pluma de contaminantes en diversas condiciones climaticas. Se adquirieron imagenes del satelite LANDSAT TM para obtener informacion de diferentes regiones del espectro electromagnetico y para corroborar observaciones sobre el comportamiento de la pluma de descarga. Ademas de los metodos convencionales para graficacion y manejo de la informacion, se empleo visualizacion tridimensional, la cual permitio interpretar patrones estacionales y de difusion. Por los excelentes resultados obtenidos con esta metodologia, se presenta a la consideracion de los especialistas este estudio como un prototipo para la determinacion de impacto en ambientes marinos

  14. Entre la Venadita y la Medusa

    Directory of Open Access Journals (Sweden)

    Valcárcel, Amelia

    2008-06-01

    Full Text Available Feminism has made in the last decades relevant advances towards equity between men and women in western societies. However, both mysogyny and gynophobia are still at work, giving as a result a «deflation of expectations» among women who enter the worlds of politics, information, corporations, economic power, knowledge, religion or art, and find a glass ceiling in full operation. The paper focuses on women artists, examines the anger expressed in feminist art as an answer to exclusion, and argues for feminist strategies of analysis and correction of inequalities.

    El feminismo ha conseguido en los últimos años importantes avances hacia la igualdad entre hombres y mujeres en las sociedades occidentales. Y, sin embargo, tanto la misoginia como la ginofobia siguen vigentes, provocando una «deflación de expectativas » entre las mujeres que se incorporan a los mundos de la política, la información, las organizaciones empresariales, el poder económico, el saber, la religión o la creatividad, y se topan con el techo de cristal a pleno funcionamiento. El artículo se centra en las mujeres creadoras para examinar la cólera expresada en el arte feminista como respuesta a la exclusión y defender estrategias feministas de análisis y corrección de desigualdades.

  15. Diferencias en comportamientos prosociales entre adolescentes colombianos

    Directory of Open Access Journals (Sweden)

    Jesús Redondo Pacheco

    2015-07-01

    Full Text Available Actualmente, se evidencia la influencia de variables socio-ambientales, como la cultura, el sexo, la edad o la nacionalidad, en la adquisición, desarrollo y mantenimiento de las conductas prosociales. El objetivo de este estudio fue analizar las diferencias en conductas prosociales entre estudiantes de educación secundaria de las ciudades de Pasto y Bucaramanga (Colombia, a quienes se administró la escala de Conducta Prosocial del TeenageInventory of Social Skills (TISS.Participaron 2.694 estudiantes con edades comprendidas entre 11 y 17 años (1878 de Pasto y 816 de Bucaramanga. De acuerdo con los resultados,los adolescentes de la ciudad de Pasto presentaron niveles significativamente más altos de conducta prosocial que los adolescentes de Bucaramanga. Este patrón de resultados fue similar por género y edad. Abstract This paper focuses on the analysis of pro-social behavior in high school students from Pasto and Bucaramanga (Colombia. 2,694 students between 11 and 17 years old (1878 from Pasto y 816 from Bucaramanga were sampled and a Pro-social Behavior Scale of Teenage Inventory of Social Skills (TISS was administered. As a result, this research shows teenagers from Pasto showed higher levels of pro-social behavior than those from Bucaramanga. Socio-environmental variables, such as culture, sex, age or nationality influence students´ pro-social behavior development and maintenance.

  16. Molecular Diagnostics

    OpenAIRE

    Choe, Hyonmin; Deirmengian, Carl A.; Hickok, Noreen J.; Morrison, Tiffany N.; Tuan, Rocky S.

    2015-01-01

    Orthopaedic infections are complex conditions that require immediate diagnosis and accurate identification of the causative organisms to facilitate appropriate management. Conventional methodologies for diagnosis of these infections sometimes lack accuracy or sufficient rapidity. Current molecular diagnostics are an emerging area of bench-to-bedside research in orthopaedic infections. Examples of promising molecular diagnostics include measurement of a specific biomarker in the synovial fluid...

  17. Molecular genetics

    International Nuclear Information System (INIS)

    Parkinson, D.R.; Krontiris, T.G.

    1986-01-01

    In this chapter the authors review new findings concerning the molecular genetics of malignant melanoma in the context of other information obtained from clinical, epidemiologic, and cytogenetic studies in this malignancy. These new molecular approaches promise to provide a more complete understanding of the mechanisms involved in the development of melanoma, thereby suggesting new methods for its treatment and prevention

  18. Molecular Modeling

    Indian Academy of Sciences (India)

    Home; Journals; Resonance – Journal of Science Education; Volume 9; Issue 5. Molecular Modeling: A Powerful Tool for Drug Design and Molecular Docking. Rama Rao Nadendla. General Article Volume 9 Issue 5 May 2004 pp 51-60. Fulltext. Click here to view fulltext PDF. Permanent link:

  19. La resistenza, entre memoria y revisionismo

    Directory of Open Access Journals (Sweden)

    Massimiliano Vellini

    2013-07-01

    Full Text Available La Resistenza es sin duda un momento clave de la historia italiana del siglo XX. Pero, a pesar de haber sido narrada en muchas obras tanto literarias como en ensayos, aún hay detalles e historias que quizás no sean conocidas por el público no especializado. Además, sobre todo en los últimos años, ha habido cada vez un mayor número de obras de periodistas o historiadores que han dado del movimiento una visión bastante alejada de la tradicionalmente dominante. En este artículo queremos dar una idea de estos episodios menos conocidos de la Resistenza partigiana y de la diatriba entre diferentes visiones de la misma.

  20. Para tener entre manos una revista

    Directory of Open Access Journals (Sweden)

    Gabriel Giannone

    2017-12-01

    Full Text Available Consideramos importante rescatar el trabajo colectivo y acumulado que precede y sucede a la labor de intermediación académica que realiza una revista. Para ello recordamos una clásica frase prologal: el texto que usted tiene en sus manos. Con cierta ironía, porque quizás muy pocos de los lectores puedan tener entre manos y oler el papel impreso de Chasqui. Desde sus pantallas, sus tablets o sus teléfonos la intención es que se comprenda este número como un solo cuerpo. Y al mismo tiempo, como un esfuerzo colectivo. Alrededor de él están las propuestas, lecturas y análisis de cientos de autores, revisores externos y lectores.

  1. Las relaciones compositivas entre cine y arquitectura

    Directory of Open Access Journals (Sweden)

    Luis Villareal Ugarte

    2011-07-01

    Full Text Available El presente texto presenta la cinematografía y, en particular, sus técnicas de creación (construcción como un referente para la proyección de la obra arquitectónica. Se hace una lectura sobre las posibilidades que surgen en el encuentro entre estas dos disciplinas, siempre desde una perspectiva del proyecto arquitectónico, es decir, desde su concepción-composición. El texto se construyó a partir de las técnicas propias del lenguaje cinematográfico, más relacionadas con la proyección espacial arquitectónica, para ir encontrando paralelos entre ambas expresiones artísticas. Con esta intención, se ha echado mano de bibliografía que, desde una perspectiva compositiva, ayude a comprender las posibilidades que representa esta relación. Igualmente, el texto hace referencia a reconocidas obras arquitectónicas que por su misma composición (y experiencia son muestra de esta actitud creadora. Estas obras ayudan a demostrar la propuesta del autor, y el texto trata de ser una invitación para releer su arquitectura desde otra perspectiva que pueda dar pie para la creación de nuevas obras arquitectónicas. Más que expositiva, la intención principal del texto es propositiva para el lector-compositor de los nuevos espacios.

  2. Characterization of agua de Ramon marbles, Cordoba Province, Argentina; Caracterizacion de los marmoles de agua de Ramon Provincia de Cordoba, Argentina

    Energy Technology Data Exchange (ETDEWEB)

    Tourn, S; Castro, L. [Departamento de Ciencias Geologicas, Facultad de Ciencias Exactas y Naturales, Universidad de buenos Aires, (Argentina)]. E mail: selvia@fcen.uba.ar, lilianacastro@fibertel.com.ar

    2004-09-01

    Agua de Ramon district is located in the NW of Cordoba, Argentina, between 3 49' and 30{sup 0}52' S and 65{sup 0}21' and 65{sup 0}24' W, in the Eastern Pampean Range setting. It was a very important tungsten district until the end of 1950'decade when tungsten mining became of no economic interest. The objective is to report for the first time the petrological, mineralogical and geochemical characteristics of several marble lenses located in the sourthern of the area. Marble outcrops are lenticular ranging from 1 m to 80 m in length and 0.50 m to 20 m width. They appear massive, fine-grained and in light colors (white, pale green, very light brown and pale gray). These last varieties show a distinct banded structure due to little differences in color. These marbles are mainly composed of magnesian calcite accompanied by minor amounts of dolomite, forsterite, humite group minerals, tremolite, talc, serpentine and clinochlore, and scheelite, sphene, apatite and opaque minerals like hematite, magnetite, illmenite, pirrothite and pyrite as accessory minerals. Major chemical analyses indicate a relatively high SiO2 and MgO content, and minor CaO, in comparison with marbles of this type. Mineral paragenesis was useful to evaluate metamorphism conditions in this area. [Spanish] El distrito Agua de Ramon se localiza en el departamento de Minas al noroeste de la provincia de Cordoba, Argentina, entre los paralelos 30{sup 0}49' y 30{sup 0}52' de latitud sur y los meridianos 65{sup 0}21' y 65{sup 0}24' de longitud oeste, en el ambito de las Sierras Pampeanas Orientales. En el pasado constituyo un importante distrito de explotacion wolframifera, pero dicha actividad se halla paralizada desde fines de la decada del '50. El objetivo de este trabajo es hacer conocer por primera vez las caracteristicas de los marmoles localizados en el sector sur desde el punto de vista petrografico, mineralogico y geoquimico de manera que permita realizar un analisis petrogenetico. Los cuerpos son

  3. Genetic variability of Cordia alliodora (R. and P.) Oken progenies; Caracterizacion de la variabilidad genetica de progenies de Cordia alliodora (R. and P.) Oken.

    Energy Technology Data Exchange (ETDEWEB)

    Marulanda, Marta Leonor; Lopez, Ana Maria; Uribe, Marcela; Ospina, Carlos Mario

    2011-07-01

    Cordia alliodora is a well-known wood producer tree of tropical areas of Latin America and the Caribbean characterized for producing valuable wood and by its fast growth rate. In Colombia, it is frequent on agro-forestall systems with coffee. This species, like most forest species have biological problems for genetic improvement programs, such as long regeneration periods and high costs for supporting a population in a long term. The molecular assisted markers in plant breeding programs have had a great impact on genetic improvement, due to the fact they minimize their intervals of regeneration, increase the genetic gain by generation and allow the evaluation of the genetic information essential for the species. In this work, 60 genotypes of C. alliodora were characterized, belonging to the provenance and progenies tests established by the program of genetic improvement of Cenicafe. The characterization was carried out through micro satellite markers, after developing a genomic library enriched with micro satellites of the species. Finally, 24 specific micro satellites were evaluated, 20 of which allowed the detection of 28 polymorphic and multiallelic loci. These results provide a guide for orienting the policies of sustainable production and conservation of this valuable species; also, it provides a useful tool for the identification of clones with commercial interest.

  4. Molecular geometry

    CERN Document Server

    Rodger, Alison

    1995-01-01

    Molecular Geometry discusses topics relevant to the arrangement of atoms. The book is comprised of seven chapters that tackle several areas of molecular geometry. Chapter 1 reviews the definition and determination of molecular geometry, while Chapter 2 discusses the unified view of stereochemistry and stereochemical changes. Chapter 3 covers the geometry of molecules of second row atoms, and Chapter 4 deals with the main group elements beyond the second row. The book also talks about the complexes of transition metals and f-block elements, and then covers the organometallic compounds and trans

  5. Synthesis and structural characterization of coaxial nano tubes intercalated of molybdenum disulfide with carbon; Sintesis y caracterizacion estructural de nanotubos coaxiales intercalados de disulfuro de molibdeno con carbono

    Energy Technology Data Exchange (ETDEWEB)

    Reza San German, C M

    2005-07-01

    In this work the study of some fundamental aspects in the growth of unidimensional systems of coaxial nano tubes from the mold method is approached. This method is an inclusion technique of a precursor reagent into oxide nano porous alumina film (mold), and later applying some processes of synthesis it is gotten to obtain the wished material. The synthesized structures are identified later because they take place by means of the initial formation of nano tubes of MoS{sub 2}, enclosing to carbon nano tubes by the same method, with propylene flow which generates a graphitization process that 'copy' the mold through as it flows. Binary phase MoS{sub 2} + C nano tubes were synthesized by propylene pyrolysis inside MoS{sub 2} nano tubes prepared by template assisted technique. The large coaxial nano tubes constituted of graphite sheets inserted between the MoS{sub 2} layers forming the outer part, and coaxial multi wall carbon nano tubes (MWCNT) intercalated with MoS{sub 2} inside. High resolution electron microscopy (HRTEM), electron energy loss spectroscopy (EELS), high angle annular dark field (HAADF), gatan image filter (GIF), nano beam electron diffraction patterns (NBEDP), along with molecular dynamics simulation and quantum mechanical calculations were used to characterize the samples. The one-dimensional structures exhibit diverse morphologies such as long straight and twisted nano tubes with several structural irregularities. The inter-planar spacing between MoS{sub 2} layers was found to increase from 6.3 to 7.4 A due to intercalation with carbon. Simulated HREM images revealed the presence of these twisted nano structures, with mechanical stretch into intercalate carbon between MoS{sub 2} layers. Our results open up the possibility of using MoS{sub 2} nano tubes as templates for the synthesis of new one- dimensional binary phase systems. (Author)

  6. Synthesis and structural characterization of coaxial nano tubes intercalated of molybdenum disulfide with carbon; Sintesis y caracterizacion estructural de nanotubos coaxiales intercalados de disulfuro de molibdeno con carbono

    Energy Technology Data Exchange (ETDEWEB)

    Reza San German, C.M

    2005-07-01

    In this work the study of some fundamental aspects in the growth of unidimensional systems of coaxial nano tubes from the mold method is approached. This method is an inclusion technique of a precursor reagent into oxide nano porous alumina film (mold), and later applying some processes of synthesis it is gotten to obtain the wished material. The synthesized structures are identified later because they take place by means of the initial formation of nano tubes of MoS{sub 2}, enclosing to carbon nano tubes by the same method, with propylene flow which generates a graphitization process that 'copy' the mold through as it flows. Binary phase MoS{sub 2} + C nano tubes were synthesized by propylene pyrolysis inside MoS{sub 2} nano tubes prepared by template assisted technique. The large coaxial nano tubes constituted of graphite sheets inserted between the MoS{sub 2} layers forming the outer part, and coaxial multi wall carbon nano tubes (MWCNT) intercalated with MoS{sub 2} inside. High resolution electron microscopy (HRTEM), electron energy loss spectroscopy (EELS), high angle annular dark field (HAADF), gatan image filter (GIF), nano beam electron diffraction patterns (NBEDP), along with molecular dynamics simulation and quantum mechanical calculations were used to characterize the samples. The one-dimensional structures exhibit diverse morphologies such as long straight and twisted nano tubes with several structural irregularities. The inter-planar spacing between MoS{sub 2} layers was found to increase from 6.3 to 7.4 A due to intercalation with carbon. Simulated HREM images revealed the presence of these twisted nano structures, with mechanical stretch into intercalate carbon between MoS{sub 2} layers. Our results open up the possibility of using MoS{sub 2} nano tubes as templates for the synthesis of new one- dimensional binary phase systems. (Author)

  7. Molecular Electronics

    DEFF Research Database (Denmark)

    Jennum, Karsten Stein

    This thesis includes the synthesis and characterisation of organic compounds designed for molecular electronics. The synthesised organic molecules are mainly based on two motifs, the obigo(phenyleneethynylenes) (OPE)s and tetrathiafulvalene (TTF) as shown below. These two scaffolds (OPE and TTF......) are chemically merged together to form cruciform-like structures that are an essential part of the thesis. The cruciform molecules were subjected to molecular conductance measurements to explore their capability towards single-crystal field-effect transistors (Part 1), molecular wires, and single electron......, however, was obtained by a study of a single molecular transistor. The investigated OPE5-TTF compound was captured in a three-terminal experiment, whereby manipulation of the molecule’s electronic spin was possible in different charge states. Thus, we demonstrated how the cruciform molecules could...

  8. Molecular sciences

    International Nuclear Information System (INIS)

    Anon.

    1975-01-01

    The research in molecular sciences summarized includes photochemistry, radiation chemistry, geophysics, electromechanics, heavy-element oxidizers , heavy element chemistry collisions, atoms, organic solids. A list of publications is included

  9. Characterization of a hot dry rock reservoir at Acoculco geothermal zone, Pue.; Caracterizacion de un yacimiento de roca seca caliente en la zona geotermica de Acoculco, Pue.

    Energy Technology Data Exchange (ETDEWEB)

    Lorenzo Pulido, Cecilia; Flores Armenta, Magaly Ramirez Silva, German [Comision Federal de Electricidad, Gerencia de Proyectos Geotermoelectricos, Morelia, Michoacan (Mexico)]. E-mail: cecilia-lorenzo@cfe.gob.mx

    2011-01-15

    metamorphism due to the emplacement of intrusive rocks (hornblende granite), which was identified in the lithologic column from both wells. Based on all these features, the Acoculco geothermal zone is a candidate for development under an EGS scheme. [Spanish] Los recursos geotermicos de roca seca caliente (HDR: Hot Dry Rock), tambien conocidos actualmente como sistemas geotermicos mejorados (EGS: Enhanced Geothermal Systems), han sido investigados de tiempo atras. El concepto de HDR es muy simple. Los yacimientos mas comunes se encuentran a unos 5000 m de profundidad y estan formados por rocas impermeables que tienen una temperatura entre 150 grados centigrados y 300 grados centigrados , y no contienen ningun tipo de fluido. La temperatura es un criterio economico principal, ya que para la generacion de energia electrica se requiere una temperatura inicial mayor a los 200 grados centigrados. Para desarrollar el sistema se hacen dos perforaciones, en una de las cuales se introduce agua fria y en la otra se obtiene agua caliente. En Francia, desde junio de 2008 se encuentra en operacion una planta de 1.5 MW como parte del proyecto Soultz-sous-Forest financiado por el European Deep Geothermal Energy Programme. A fin de caracterizar los yacimientos HDR se llevo a cabo una recopilacion de informacion multidisciplinaria referente a: (1) origen de la fuente de calor, (2) informacion cuantitativa de temperatura y mecanismos de transferencia de calor natural, (3) fallas y fracturas naturales, (4) esfuerzos locales, y (5) tipo de basamento. Esta informacion se aplico a la zona geotermica de Acoculco, Pue., explorada por el Departamento de Exploracion mediante los pozos EAC-1 y EAC-2 para determinar la presencia de un yacimiento de alta temperatura (de 220 grados centigrados a mas 250 grados centigrados). Esta zona presenta las siguientes caracteristicas: (1) Origen de la fuente de calor: volcano-tectonico; (2) Los registros de temperatura mostraron valores de 263.8 grados centigrados y

  10. ARTESANATO: ENTRE PATRIMÔNIO E MERCADO

    Directory of Open Access Journals (Sweden)

    Miriel Bilhalva Herrmann

    2016-12-01

    Full Text Available O presente trabalho busca estabelecer uma analise em relação a questão do artesanato, de como sofre modificações e interferências . Na qual no seu inicio tinha apenas valor utilitário, pois era produzido para suprir necessidades humanas. E com a revolução industrial foi relegada a marginalização, assim perdeu seu espaço para as máquinas. Mas logo com o intuito de criar identidades nacionais, começam as discussões em relação ao patrimônio. Dessa forma as concepções e ampliação sobre o seu conceito, propiciou grande valorização das diversidades culturais, assim como as técnicas artesanais. E a partir disso o artesanato passa a ser percebido como patrimônio, sendo visto e utilizado pelo turismo como fator de desenvolvimento econômico, dessa forma ocasionando um dilema entre estas técnicas artesanais de como se manter tradicionais, referência para a cultura e a identidade cultural. Ao mesmo tempo atender as necessidades do consumidor que se apresenta como turista, pois necessitam se adaptar para continuar sobrevivendo as mudanças do mercado

  11. Entre la Historia y el Cine

    Directory of Open Access Journals (Sweden)

    Luisa Fernanda Acosta

    1995-01-01

    Full Text Available Este trabajo se propone aplicar al cine el concepto de «fuente histórica». El uso de medios de comunicación como el cine está íntimamente relacionado con las necesidades y posibilidades de una sociedad, lo que implica una relación muy cercana entre el desarrollo social y económico de una comunidad, y los mecanismos que ella genera como canales de expresión y comunicación. El cine, conjugación de imagen, sonido y movimiento se convierte para la sociedades contemporáneas en una gran alternativa como fuente histórica, que provee al investigador ópticas diferentes de una realidad ya explorada. Un gesto, una mirada, un plano, una secuencia, se traducen en frases y párrafos, que generan una versión diferente de la historia, una redacción que se lee en imágenes y que narra otro punto de vista, un relato oculto que tiene todo por contar.

  12. Acidentes de trabalho ocorridos entre adolescentes

    Directory of Open Access Journals (Sweden)

    Aline Alcântara Pimenta

    2013-01-01

    Full Text Available Este estudio tuvo como objetivo identificar los accidentes de trabajo producidos entre los adolescentes en una fundación de educación para el trabajo. Estudio descriptivo, cuantitativo que investigó 117 adolescentes trabajadores a través de un cuestionario multidimensional. De los encuestados, el 72,6% eran mujeres, el 80,3% tenían 15 años, el 60% eran pardos y el 62,4% no trabajaba anteriormente. Las actividades más populares realizadas fueron las siguientes: Recepcionista (46,2% y auxiliar administrativo (37,6%. Sufrieron accidentes en el trabajo o antes de llegar a este el 11% de los encuestados, de los cuales 76,9% eran típicos y se produjeron en la tarde (61,5%. Las piernas y los pies fueron los miembros mas heridos (46,2%, seguido por abrasiones y lesiones graves (30,8%. El trabajo de niños y adolescentes pueden presentar agravios, que se clasifican como accidentes. El enfrentamiento de este problema no puede ser pensado sólo en términos de vigilancia de los lugares de trabajo y de las políticas dirigidas a la salud del trabajador; hay una necesidad de una mayor transformación en la estructura de la sociedad, de modo que el trabajo perjudique la salud.

  13. Molecular fountain.

    Energy Technology Data Exchange (ETDEWEB)

    Strecker, Kevin E.; Chandler, David W.

    2009-09-01

    A molecular fountain directs slowly moving molecules against gravity to further slow them to translational energies that they can be trapped and studied. If the molecules are initially slow enough they will return some time later to the position from which they were launched. Because this round trip time can be on the order of a second a single molecule can be observed for times sufficient to perform Hz level spectroscopy. The goal of this LDRD proposal was to construct a novel Molecular Fountain apparatus capable of producing dilute samples of molecules at near zero temperatures in well-defined user-selectable, quantum states. The slowly moving molecules used in this research are produced by the previously developed Kinematic Cooling technique, which uses a crossed atomic and molecular beam apparatus to generate single rotational level molecular samples moving slowly in the laboratory reference frame. The Kinematic Cooling technique produces cold molecules from a supersonic molecular beam via single collisions with a supersonic atomic beam. A single collision of an atom with a molecule occurring at the correct energy and relative velocity can cause a small fraction of the molecules to move very slowly vertically against gravity in the laboratory. These slowly moving molecules are captured by an electrostatic hexapole guiding field that both orients and focuses the molecules. The molecules are focused into the ionization region of a time-of-flight mass spectrometer and are ionized by laser radiation. The new molecular fountain apparatus was built utilizing a new design for molecular beam apparatus that has allowed us to miniaturize the apparatus. This new design minimizes the volumes and surface area of the machine allowing smaller pumps to maintain the necessary background pressures needed for these experiments.

  14. Calixarene receptors in the selective separation of alachlor. Characterization of the separated complexes; Receptores calixarenicos en la separacion selectiva de alaclor. Caracterizacion de los complejos separados

    Energy Technology Data Exchange (ETDEWEB)

    Garcia G, M C

    2004-07-01

    while 165 h were necessary with H{sub n}bL{sup n} in dilute as concentrate solutions, solvents as chloroform and acetonitrile did not interfere in the formation of the species. At the same time and based on the structure of the reactants and information from the scientific literature related to this particular topic, using the M M3, CONFLEX and MOPAC/PM5/COSMO procedures, we calculated the optimized geometry which rendered the most stable molecular structures of reactants and products, this means those with the lowest minimum energies, the lowest energies of the most stable conformers and the heat of formation of the most stable conformational structures of the calixarene-substrate species. The latter were those formed by hydrogen bonding and {pi}-{pi} interactions. Species formed with H{sub n}bL{sup n} stabilized by hydrogen bonding through CH{sub 2}-Cl interaction of alachlor with OH groups of the calixarenes. Concerning the phosphinoylated calixarenes, the P=O groups immobilize the alachlor by hydrogen bonding with the benzyl of the acetanilide. However, the species formed with alachlor and parents or functionalized calixarenes demanded a second interaction between calixarene phenyl-{pi}-{pi}-benzyl-alachlor to be stabilised. Heat of formation of reactants and products allowed to calculate the heat o reaction associated to the formation of the hosts...guest species, these results were surprising in line with the experimental results. Based on the solution and computational results we synthesized and isolated the calixarene---alachlor complexes in sizeable amounts. The latter were characterized by spectroscopic techniques like IR, UV-Vis, luminescence and elemental analysis. The results from the solution and solid studies of the reagents and products as molar absorption coefficients, the features of the luminescence and IR spectra, luminescence lifetimes and minimum formulae of the isolated complexes are in good agreement with the parameters and tendencies of the

  15. Calixarene receptors in the selective separation of alachlor. Characterization of the separated complexes; Receptores calixarenicos en la separacion selectiva de alaclor. Caracterizacion de los complejos separados

    Energy Technology Data Exchange (ETDEWEB)

    Garcia G, M.C

    2004-07-01

    while 165 h were necessary with H{sub n}bL{sup n} in dilute as concentrate solutions, solvents as chloroform and acetonitrile did not interfere in the formation of the species. At the same time and based on the structure of the reactants and information from the scientific literature related to this particular topic, using the M M3, CONFLEX and MOPAC/PM5/COSMO procedures, we calculated the optimized geometry which rendered the most stable molecular structures of reactants and products, this means those with the lowest minimum energies, the lowest energies of the most stable conformers and the heat of formation of the most stable conformational structures of the calixarene-substrate species. The latter were those formed by hydrogen bonding and {pi}-{pi} interactions. Species formed with H{sub n}bL{sup n} stabilized by hydrogen bonding through CH{sub 2}-Cl interaction of alachlor with OH groups of the calixarenes. Concerning the phosphinoylated calixarenes, the P=O groups immobilize the alachlor by hydrogen bonding with the benzyl of the acetanilide. However, the species formed with alachlor and parents or functionalized calixarenes demanded a second interaction between calixarene phenyl-{pi}-{pi}-benzyl-alachlor to be stabilised. Heat of formation of reactants and products allowed to calculate the heat o reaction associated to the formation of the hosts...guest species, these results were surprising in line with the experimental results. Based on the solution and computational results we synthesized and isolated the calixarene---alachlor complexes in sizeable amounts. The latter were characterized by spectroscopic techniques like IR, UV-Vis, luminescence and elemental analysis. The results from the solution and solid studies of the reagents and products as molar absorption coefficients, the features of the luminescence and IR spectra, luminescence lifetimes and minimum formulae of the isolated complexes are in good agreement with the parameters and tendencies of the

  16. Max Weber entre liberalismo y republicanismo

    Directory of Open Access Journals (Sweden)

    Villacañas Berlanga, José Luis

    2005-12-01

    Full Text Available This article attempts to analyze the differences between social democracy and political democracy as modern processes, as these were understood by Max Weber. The archetype of modernity resides, from this point of view, in a convergence of both processes, as occurred in countries like the USA and Great Britain. Weber's diagnosis is that, whereas social democracy can be organized around liberal arguments, political democracy cannot advance without republican concepts like those of virtue, rigour, responsability and representation. For Weber, these values could only become present in Germany thanks to an adequate and democratic reception of Nietzsche, and in some way this reception could make sense of the former's work.

    Este artículo pretende analizar las diferencias entre democracia social y democracia política como procesos modernos, tal y como fueron comprendidos por Max Weber. Lo arquetípico de la modernidad reside, desde este punto de vista, en una convergencia de ambos procesos, tal y como se dio en países como USA y Gran Bretaña. El diagnóstico de Weber es que, mientras la democracia social puede organizarse sobre argumentos liberales, la democracia política no puede avanzar sin conceptos republicanos como el de virtud, rigor, responsabilidad y representación. Para Weber, estos valores sólo podrían hacerse presentes en Alemania a partir de una recepción adecuada y democrática de Nietzsche y en cierto modo esta recepción daría sentido a su obra.

  17. Molecular docking.

    Science.gov (United States)

    Morris, Garrett M; Lim-Wilby, Marguerita

    2008-01-01

    Molecular docking is a key tool in structural molecular biology and computer-assisted drug design. The goal of ligand-protein docking is to predict the predominant binding mode(s) of a ligand with a protein of known three-dimensional structure. Successful docking methods search high-dimensional spaces effectively and use a scoring function that correctly ranks candidate dockings. Docking can be used to perform virtual screening on large libraries of compounds, rank the results, and propose structural hypotheses of how the ligands inhibit the target, which is invaluable in lead optimization. The setting up of the input structures for the docking is just as important as the docking itself, and analyzing the results of stochastic search methods can sometimes be unclear. This chapter discusses the background and theory of molecular docking software, and covers the usage of some of the most-cited docking software.

  18. La sociologie clinique entre psychanalyse et socioanalyse

    Directory of Open Access Journals (Sweden)

    Vincent de Gaulejac

    2008-04-01

    Full Text Available L'introduction de la démarche clinique en sociologie conduit à réinterroger les différences et les complémentarités entre la psychanalyse et la sociologie sur trois points : leur façon d'appréhender la question de l'inconscient; le poids respectif des déterminations psychiques et sociales, le travail qu'un sujet peut effectuer sur son histoire pour en modifier le cours. Ces questions ont été l'objet de nombreux débats. Le présent article met en perspective les positions de Sigmund Freud et de Pierre Bourdieu. L'un et l'autre incarnent et défendent des points de vue théoriques qui articulent une théorie de l'homme en société étayée sur une pratique de changement. Confrontation intéressante dans la mesure où les postulats de départ de ces deux auteurs sont très éloignés. Sigmund Freud cherche la clé explicative des comportements humains du côté du registre intra psychique, alors que Pierre Bourdieu la pose du côté de l'intériorisation des structures sociales. Pourtant à partir de prémisses différents ils se rejoignent sur bien des points. Ces convergences permettent de s'appuyer sur leurs approches pour définir les contours d'une méthodologie qui s'inspire tout à la fois de la psychanalyse et de la socioanalyse.Clinical sociology between psychoanalysis and socioanalysisThe introduction of the clinical approach in sociology lead us to reconsider the differencies and complementarities between psychoanalysis and sociology on three aspects: their way of taking into account the unconscious; the relative weight of social and psychic predeterminations; the work that can be done by somebody on his/her own history in order to modify its course. Those questions have been largely debated. The purpose of this article is to compare on those topics the positions of Sigmund Freud and Pierre Bourdieu. Both develop theories which include a conception of man in society supported by a change practice. The interest of this

  19. Molecular modeling

    Directory of Open Access Journals (Sweden)

    Aarti Sharma

    2009-01-01

    Full Text Available The use of computational chemistry in the development of novel pharmaceuticals is becoming an increasingly important tool. In the past, drugs were simply screened for effectiveness. The recent advances in computing power and the exponential growth of the knowledge of protein structures have made it possible for organic compounds to be tailored to decrease the harmful side effects and increase the potency. This article provides a detailed description of the techniques employed in molecular modeling. Molecular modeling is a rapidly developing discipline, and has been supported by the dramatic improvements in computer hardware and software in recent years.

  20. Caracterizacion fisiológica del crecimiento y desarrollo del fruto de mango (mangifera indica l. variedad van dyke en el municipio de el Espinal

    Directory of Open Access Journals (Sweden)

    Galvis Jose Antonio

    2002-12-01

    ="font-size: 12pt; font-family: "> 

    Se realizó el seguimiento de los cambios ocurridos durante el crecimiento y desarrollo del mango Variedad Van Dyke, desde la antesis hasta la madurez fisiológica: Diámetros longitudinal, transversal, el volumen, la gravedad específica, el peso fresco y seco, color de la corteza y de la pulpa y la Intensidad Respiratoria. El diseño experimental empleado fue completamente al azar.

     

    Se estableció que el tiempo que transcurre desde la antesis hasta alcanzar la madurez fisiológica es de 90 días. El crecimiento del fruto es de tipo Sigmoidal Simple. Se identificaron 3 etapas durante el crecimiento. El análisis de regresión permitió establecer modelos 1ineales para las características físicas.

     

    El fruto presentó alta intensidad respiratoria en los primeros días del crecimiento y fue disminuyendo hasta alcanzar valores mínimos al final de la etapa de crecimiento. Hubo una alta correlación inversa entre la I.R. y las variables físicas medidas.

     

  1. Molecular spectroscopy

    International Nuclear Information System (INIS)

    Kokh, Eh.; Zonntag, B.

    1981-01-01

    The latest investigation results on molecular spectroscopy with application of synchrotron radiation in the region of vacuum ultraviolet are generalized. Some results on investigation of excited, superexcited and ionized molecule states with the use of adsorption spectroscopy, photoelectron spectroscopy, by fluorescent and mass-spectrometric methods are considered [ru

  2. Molecular Foundry

    Science.gov (United States)

    . New Study Indicates Greater Capacity for Carbon Storage in the Earth's Subsurface A team of Foundry minerals which make up the dominant clays in the Earth's deep subsurface. Doubling Down on Energy Storage identify molecular components within small volumes of biological samples, such as blood or urine. Industry

  3. Molecular farming

    NARCIS (Netherlands)

    Merck, K.B.; Vereijken, J.M.

    2006-01-01

    Molecular Farming is a new and emerging technology that promises relatively cheap and flexible production of large quantities of pharmaceuticals in genetically modified plants. Many stakeholders are involved in the production of pharmaceuticals in plants, which complicates the discussion on the

  4. Molecular gastronomy

    Science.gov (United States)

    This, Hervé

    2005-01-01

    For centuries, cooks have been applying recipes without looking for the mechanisms of the culinary transformations. A scientific discipline that explores these changes from raw ingredients to eating the final dish, is developing into its own field, termed molecular gastronomy. Here, one of the founders of the discipline discusses its aims and importance.

  5. Molecular Star

    Indian Academy of Sciences (India)

    In molecular self-assembly, molecules put themselves together in a predefined way ... work has been already published in Chemistry- A European Jour- nal in the September ... prevalent in matter ranging from atoms to molecules to biomolecules; it is also ... erate chemical forces are reversible and dynamic in nature mean-.

  6. Molecular ferromagnetism

    International Nuclear Information System (INIS)

    Epstein, A.J.

    1990-01-01

    This past year has been one of substantial advancement in both the physics and chemistry of molecular and polymeric ferromagnets. The specific heat studies of (DMeFc)(TCNE) have revealed a cusp at the three-dimensional ferromagnetic transition temperature with a crossover to primarily 1-D behavior at higher temperatures. This paper discusses these studies

  7. USO DE TABACO ENTRE ADOLESCENTES: REVISÃO DE LITERATURA

    OpenAIRE

    Amanda Márcia dos Santos Reinaldo; Camila Cesar Goecking; Jennifer Perucci de Almeida; Yasmin Narciso Goulart

    2010-01-01

    Revisión sistemática de la literatura sobre el uso de tabaco entre adolescentes. La utilización del tabaco entre adolescentes, en general, puede estar asociada al éxito, a la necesidad de aceptación, a cuestiones familiares, entre otros factores que incentivan de cierta forma a su uso. Las políticas de salud para el área trabajan para prevenir y reducir el consumo, alertando en relación al riesgo al que tal población se expone cuando utiliza tabaco. Conocer el perfil de los adolescentes que u...

  8. Molecular Modelling

    Directory of Open Access Journals (Sweden)

    Aarti Sharma

    2009-12-01

    Full Text Available

    The use of computational chemistry in the development of novel pharmaceuticals is becoming an increasingly important
    tool. In the past, drugs were simply screened for effectiveness. The recent advances in computing power and
    the exponential growth of the knowledge of protein structures have made it possible for organic compounds to tailored to
    decrease harmful side effects and increase the potency. This article provides a detailed description of the techniques
    employed in molecular modeling. Molecular modelling is a rapidly developing discipline, and has been supported from
    the dramatic improvements in computer hardware and software in recent years.

  9. Study, by simple or double extraction of pure or doped supersonic jets, of the effects intervening in the formation of a molecular beam of high intensity and with energy comprised between 0 and 25 eV; Etude, par simple et double extraction de jets supersoniques purs ou dopes, des effets intervenant dans la formation d'un faisceau moleculaire de haute intensite et d'energie comprise entre 0 et 25 eV

    Energy Technology Data Exchange (ETDEWEB)

    Campargue, Roger

    1970-01-07

    This research thesis addresses the use of supersonic molecular jets. The author first recalls conventional laws related to gas flows in ducts, presents some already known properties of free jets and of the associated shock structures, and gives the rate characteristic curves for the both sonic ducts which are the most commonly used. Then, he presents the results obtained by simple extraction by using only the first two chambers of the generator. In the third part, he recalls the theory of conventional and supersonic molecular jets, presents experimental conditions to obtain these jets, discusses the assumptions associated with theoretical results, and describes the developed generators which operate by double extraction with relatively high pressures. In the next parts, the author reports the production and study of high intensity molecular jets, and the production of intermediate energy molecular jets obtained by aerodynamically accelerating heavy molecules by means of a light gas (hydrogen or helium)

  10. Molecular scale

    Directory of Open Access Journals (Sweden)

    Christopher H. Childers

    2016-03-01

    Full Text Available This manuscript demonstrates the molecular scale cure rate dependence of di-functional epoxide based thermoset polymers cured with amines. A series of cure heating ramp rates were used to determine the influence of ramp rate on the glass transition temperature (Tg and sub-Tg transitions and the average free volume hole size in these systems. The networks were comprised of 3,3′-diaminodiphenyl sulfone (33DDS and diglycidyl ether of bisphenol F (DGEBF and were cured at ramp rates ranging from 0.5 to 20 °C/min. Differential scanning calorimetry (DSC and NIR spectroscopy were used to explore the cure ramp rate dependence of the polymer network growth, whereas broadband dielectric spectroscopy (BDS and free volume hole size measurements were used to interrogate networks’ molecular level structural variations upon curing at variable heating ramp rates. It was found that although the Tg of the polymer matrices was similar, the NIR and DSC measurements revealed a strong correlation for how these networks grow in relation to the cure heating ramp rate. The free volume analysis and BDS results for the cured samples suggest differences in the molecular architecture of the matrix polymers due to cure heating rate dependence.

  11. Status of computational and experimental correlations for Los Alamos fast-neutron critical assemblies; Correlation entre les calculs et les experiences sur les ensembles critiques a neutrons rapides de Los Alamos; Sostoyanie vychislitel'nykh i ehksperimental'nykh korrelyatsij dlya Los-Alamosskoj kriticheskoj sistemy na bystrykh nejtronakh; Conjuntos criticos de neutrones rapidos de Los Alamos; correlacion entre resultados calculados y experimentales

    Energy Technology Data Exchange (ETDEWEB)

    Hansen, G E [Los Alamos Scientific Laboratory, University of California, Los Alamos, NM (United States)

    1962-03-15

    les reacteurs ainsi qu'a celle des methodes de calcul, permettent de connaitre de mieux en mieux les caracteristique s d'une classe d'ensembles critiques a neutrons rapides. Cette classe comprend maintenant des montages a {sup 233}U, en geometrie spherique, sans reflecteur ou avec un reflecteur constitue d'une couche epaisse d'uranium. L'auteur presente des correlations directes parmi les donnees experimentales , pour montrer qu'il existe a priori la possibilite de bonnes correlations avec les resultats des calculs. La sensibilite des spectres calcules et des dimensions critiques aux modeles de transport neutronique (approximations du transport et hypothese de linearite) et aux approximations arithmetiques (hypothese de la segmentation angulaire et representations multigroupes) est presentee pour divers ensembles critiques afin d'aider a etablir les details des calculs indispensables. La comparaison entre l'experience et les previsions porte sur les indices spectraux et les dimensions critiques, les durees de vie des neutrons et les rapports relatifs aux neutrons retardes. (author) [Spanish] La puesta en servicio de nuevos conjuntos criticos y el perfeccionamiento de los metodos de medicion exigen una revision periodica de la correlacion entre los resultados calculados y los experimentales. Dados los problemas particularmente delicados que plantea la medicion de indices espectrales absolutos y dada tambien la necesidad de comprobar los calculos mas alla de las simples dimensiones criticas, conviene hacer hincapie en las caracterizaciones de los espectros neutronicos. El continuo perfeccionamient o ds las mediciones de indices espectrales, unido a la creciente precision de los datos microscopicos relativos a los materiales utilizados en los conjuntos criticos y en los detectores asi como la de los metodos de calculo contribuyen a un mejor conocimiento de las caracteristicas de un grupo de conjuntos criticos de neutrones rapidos. Este grupo compiende actualmente los

  12. Spintronics: The molecular way

    Science.gov (United States)

    Cornia, Andrea; Seneor, Pierre

    2017-05-01

    Molecular spintronics is an interdisciplinary field at the interface between organic spintronics, molecular magnetism, molecular electronics and quantum computing, which is advancing fast and promises large technological payoffs.

  13. Molecular nanomagnets

    CERN Document Server

    Gatteschi, Dante; Villain, Jacques

    2006-01-01

    Nanomagnetism is a rapidly expanding area of research which appears to be able to provide novel applications. Magnetic molecules are at the very bottom of the possible size of nanomagnets and they provide a unique opportunity to observe the coexistence of classical and quantum properties. The discovery in the early 90's that a cluster comprising twelve manganese ions shows hysteresis of molecular origin, and later proved evidence of quantum effects, opened a new research area whichis still flourishing through the collaboration of chemists and physicists. This book is the first attempt to cover

  14. Molecular plasmonics

    CERN Document Server

    Fritzsche, Wolfgang

    2014-01-01

    Adopting a novel approach, this book provides a unique ""molecular perspective"" on plasmonics, concisely presenting the fundamentals and applications in a way suitable for beginners entering this hot field as well as for experienced researchers and practitioners. It begins by introducing readers to the optical effects that occur at the nanoscale and particularly their modification in the presence of biomolecules, followed by a concise yet thorough overview of the different methods for the actual fabrication of nanooptical materials. Further chapters address the relevant nanooptics, as well as

  15. Geotechnical characterization through in situ and laboratory tests of several geological formations present in the route of the Future Fix Connection between Spain and Morocco through Gibraltar Strait; Caracterizacion geotecnica mediante ensayos in situ y de laboratorio de algunas formaciones geologicas presentes en la traza de la Futura Conexion Fija entre Espana y Marruecos a traves del estrecho de Gibraltar

    Energy Technology Data Exchange (ETDEWEB)

    Perucho Martinez, A.; Diez Torres, J. A.; Muniz Menendez, M.; Cano Linares, H.; Ruiz Fonticiella, J. M.

    2015-07-01

    CEDEX and SECEGSA (Sociedad Española para la Comunicación Fija a través del Estrecho de Gibraltar), Have been collaborating since a few decades ago to study different technical aspects related to the Fix Connection through the Gibraltar Strait, mainly in relation to the geological and geotechnical properties of the different formations present in the route. In order to do so, many studies of geotechnical characterization of materials, in situ and laboratory testing campaigns have been carried out. Furthermore, they have participated in some Expertise Committees carrying out some advice work related to studies performed by other organizations. This paper presents a brief description of the most relevant aspects of the main geological and geotechnical studies performed related to this Project of the Future Fix Connection and obtained through the study of SECEGSAs extensive data base. Moreover, it includes a synopsis of the geotechnical characterization carried out through in situ and laboratory tests on different Miocene and Eocene formations from the Algeciras Unit, present in the route of the future Fix Connection between Spain and gibraltar through the Gibraltar Strait. (Author)

  16. Comparision between biphasic helical CT and dynamic gadolinium-enhanced MR in the detection and characterization of focal hepatic lesions in cirrhotic patients; Estudio comparativo entre TC helicoidal bifasica y RM dinamica con gadolinio en la deteccion y caracterizacion de lesiones focales hepticas en pacientes cirrticos

    Energy Technology Data Exchange (ETDEWEB)

    Puig, J; Martn, J; Donoso, L; Falco, J; Rue, M [Consorcio Hospitalario del Parc Taul. Sabadell. Barcelona (Spain)

    1998-12-31

    To assess the agreement between biphasic helical computerized tomography (BHCT) and dynamic gadolinium-enhanced magnetic resonance (MR) in the detection and characterization of focal hepatic lesions in a group of cirrhotic patients. A prospective study was done in 50 cirrhotic patients suspected of having hepatocarcinoma (HC) on the basis of ultrasonographic images evaluated by means of BHCT and dynamic gadolinium-enhanced MR using fast low-angle shot (FLASH) sequences (110-135/4/90 degree centigree). The images were assessed jointly by four radiologists. Between the two techniques, a total of 83 lesions were detected. MR disclosed more lesions (n=79) than BHCT (n=67) (p<0.005). Moreover, 25 of the lesions that were visible by both techniques were more clearly evident in MR images (p<0.01). MR correctly classified 6 of 7 benign lesions (85%) and 49 of 66 malignant ones (74%). BHCT correctly classifed 2 of 7 benign lesions (28%) and 32 of 66 malignant ones (48%). The sensitivities of MR and BHCT for the characterization of these lesions were 74% and 48%, respectively (p=0.0009), while the respective specificities were 86% and 29% (P<0.001). Dynamic gadolinium-enhanced MR with FLASH sequences is more efficient than BHCT in the detection and characterization of focal lesions in cirrhotic patients. (Author) 37 refs.

  17. A FOTOGRAFIA ENTRE A ARTE POPULAR E A ARTE ERUDITA

    Directory of Open Access Journals (Sweden)

    Marcos Fabris

    2013-09-01

    Full Text Available Este artigo pretende discutir alguns dos aspectos que marcam o estabelecimento e a dissolução das fronteiras entre dois pólos convencionalmente descritos como arte culta e arte popular, tecendo paralelos entre o teatro de variedades, forma de expressão popular por excelência, e a fotografia, expressão artística que desde seus primórdios circula entre os dois extremos deste contínuo. Nestes termos, ambiciona-se verificar como determinadas condições sócio-históricas favorecem a criação de recursos formais que minimizam, ou suprimem, tais distinções consagradas pela crítica de arte.

  18. Progress on molecular imaging

    International Nuclear Information System (INIS)

    Chen Quan; Zhang Yongxue

    2011-01-01

    Molecular imaging is a new era of medical imaging,which can non-invasively monitor biological processes at the cellular and molecular level in vivo, including molecular imaging of nuclear medicine, magnetic resonance molecular imaging, ultrasound molecular imaging,optical molecular imaging and molecular imaging with X-ray. Recently, with the development of multi-subjects amalgamation, multimodal molecular imaging technology has been applied in clinical imaging, such as PET-CT and PET-MRI. We believe that with development of molecular probe and multi-modal imaging, more and more molecular imaging techniques will be applied in clinical diagnosis and treatment. (authors)

  19. Determinantes de la precarización laboral en Argentina entre 2003-2013: entre los cambios y las continuidades

    Directory of Open Access Journals (Sweden)

    Marcelo Delfini

    2016-03-01

    Full Text Available El crecimiento económico experimentado por Argentina desde 2003 ha tenido su correlato en la mejora de los indicadores laborales. No obstante, la precarización laboral se ha mantenido, luego de una baja importante hasta el año 2007, en valores muy elevados. Partiendo de la idea central que la precarización constituye para el capital, una reducción de costos, el objetivo de este artículo es dar cuenta de los determinantes de la informalidad entre los trabajadores asalariados, estableciendo continuidades y cambios entre los años 2003 y 2013. Para ello utilizamos una metodología cuantitativa con fuentes secundarias de información, a partir de las cuales realizamos dos tipo de análisis, el primero de carácter descriptivo a partir del cual se busca dar cuenta de las características del mercado de trabajo argentino entre 1990 y 2013 y el segundo se realiza por medio de una regresión logística binomial, que permite acercarnos a los determinantes de la precarización de las condiciones de trabajo. En este sentido, se pudo observar que entre los años 2003 y 2013, se consolidó una precarización laboral, cuyos determinantes no lograron modificarse sustancialmente entre los años de referencia.

  20. Risco nutricional entre gestantes adolescentes Riesgo nutricional entre gestantes adolescentes Nutritional risks among pregnant teenagers

    Directory of Open Access Journals (Sweden)

    Glayriann Oliveira Belarmino

    2009-01-01

    Full Text Available OBJETIVOS: Identificar o acometimento de risco nutricional em gestantes adolescentes; averiguar hábitos alimentares; e verificar percepções destes quanto à importância de nutrição adequada na gravidez. MÉTODOS: Estudo de campo realizado no Centro de Desenvolvimento Familiar, em Fortaleza-CE, com 40 gestantes adolescentes. A avaliação nutricional foi efetuada com o auxílio do "Gráfico de acompanhamento nutricional da gestante" e os hábitos alimentares foram conferidos pela "Técnica de alimentação diária habitual". RESULTADOS: Vinte (50% adolescentes apresentaram peso adequado, 11(27,5% baixo peso e 9 (22,5% sobrepeso. Prevaleceram massas, carnes, gorduras, doces e baixo consumo de frutas e verduras; 33 (82,5% tinham a percepção de que a alimentação deve ser "diferente" na gravidez e 28 (70% afirmaram ter feito mudanças nos hábitos alimentares no pré-natal. CONCLUSÃO: O acometimento de risco nutricional entre adolescentes gestantes se revelou em situações de sobrepeso, baixo peso, dietas pouco diversificadas e desinformação.OBJETIVOS: Identificar el riesgo nutricional en gestantes adolescentes; averiguar hábitos alimenticios; y verificar percepciones de éstos en cuanto a la importancia de una nutrición adecuada en el embarazo. MÉTODO: Se trata de un estudio de campo realizado en el Centro de Desarrollo Familiar, en Fortaleza-CE, con 40 gestantes adolescentes. La evaluación nutricional se llevó a cabo con el auxilio del "Gráfico de acompañamiento nutricional de la gestante" y los hábitos alimenticios fueron conferidos por la "Técnica de alimentación diaria habitual". RESULTADOS: Veinte (50% adolescentes presentaron peso adecuado, 11(27,5% bajo peso y 9 (22,5% sobre peso. Prevalecieron pastas, carnes, grasas, dulces y bajo consumo de frutas y verduras; 33 (82,5% tenían la percepción de que la alimentación debe ser "diferente" durante el embarazo y 28 (70% afirmaron haber realizado cambios en los h

  1. Relaciones entre los salarios y la productividad en Colombia

    OpenAIRE

    Méndez Sayago, Jhon Alexander

    2017-01-01

    Esta tesis de doctorado está compuesta de cuatro artículos que tienen como propósito estudiar las relaciones entre los salarios y la productividad laboral en Colombia. Los dos primeros artículos denominados “Salario real y eficiencia del trabajo en el sector manufacturero en Colombia” y “Análisis de causalidad y sensibilidad entre los salarios reales y la productividad laboral en el sector manufacturero a partir de cifras de los departamentos en Colombia” aportan evidencia empírica sobre la d...

  2. Arquitectura de comunicación entre frameworks jadesymfony

    OpenAIRE

    RODRÍGUEZ C., PAOLA J.; GÓMEZ R., SANTIAGO

    2009-01-01

    La inclusión del uso de Agentes dentro del campo del desarrollo de software es una de las principales áreas de estudio en la actualidad. Específicamente, el desarrollo de aplicaciones Web que aprovechen las ventajas que ofrece la tecnología de agentes y en especial las distintas propuestas de comunicación entre frameworks son esfuerzos importantes dentro de este campo. En este sentido, este artículo describe una arquitectura de comunicación entre dos de los principales frameworks de desarroll...

  3. Entre ritmo e poesia: rap e literatura oral urbana

    Directory of Open Access Journals (Sweden)

    Marcus Rogerio Salgado

    2015-11-01

    Full Text Available O objetivo do presente artigo é um estudo do rap enquanto manifestação de literatura oral urbana e forma de oralidade tecnológica. Para tanto, o artigo passará em revista as relações entre literatura e palavra falada/cantada, assim como as possibilidades de interface estética entre a literatura e a música que estão em questão quando tratamos do rap.

  4. Factores de riesgo que condicionan la conducta machista entre adolescentes.

    OpenAIRE

    Sánchez Alonso, Isabel

    2016-01-01

    Este trabajo sobre los factores de riesgo que condicionan la violencia machista entre adolescentes, recoge las principales argumentaciones que explican el origen de la desigualdad entre hombres y mujeres y de cómo la diferencia biológica ha incidido en la división del trabajo según el sexo y en las funciones y roles que debe desempeñar cada uno. A continuación señala los principales factores de riesgo que condicionan la violencia machista en las primeras relaciones am...

  5. Encuentros improbables: Cervantes y Shakespeare entre Borges y Burgess

    OpenAIRE

    Martínez, Zenón Luis

    2016-01-01

    En sus biografías sobre Cervantes y Shakespeare, Luis Astrana Marín especuló con un encuentro entre ambos con ocasión de la ratificación en 1605 en Valladolid del Tratado de Londres. Este improbable encuentro ha seguido alimentando ficciones históricas y fantasías literarias. El cruce de caminos entre Cervantes y Shakespeare tiene lugar en torno a la perdida tragicomedia The History of Cardenio (1612?), atribuida a John Fletcher y William Shakespeare. La recon...

  6. Entre Madres: Talleres de Comunicación

    OpenAIRE

    Cardoso Moreno, María Jesús; Aragonés, Lucía Tomás

    2015-01-01

    En el presente artículo se expone el trabajo de investigación cuyo objetivo fue conocer el grado de satisfacción de las madres con un taller de formación denominado "Entremadres". Las 150 mujeres madres que participaron en el taller en la ciudad de Zaragoza, España, se conformaron en un grupo de 7 u 8 madres y estuvo compuesto por seis sesiones de dos horas cada una, entre los años 2008 y 2013. Este taller fue dirigido a madres con hijos de edades comprendidas entre 2 y 16 años. La frecuencia...

  7. La discapacidad entre poblaciones refugiadas y afectadas por conflictos

    OpenAIRE

    Reilly, Rachael

    2010-01-01

    La Comisión de Mujeres Refugiadas lanzó en el año 2007 un importante proyecto de investigación para evaluar la situación de las personas con discapacidad entre las poblaciones desplazadas o afectadas por conflictos.

  8. Molecular Electronic Terms and Molecular Orbital Configurations.

    Science.gov (United States)

    Mazo, R. M.

    1990-01-01

    Discussed are the molecular electronic terms which can arise from a given electronic configuration. Considered are simple cases, molecular states, direct products, closed shells, and open shells. Two examples are provided. (CW)

  9. Characterization of the interaction layer in diffusion couples U-Mo-Zr/Al and U-Mo-Zr/Al-A356 at 550 C degrees; Caracterizacion de la zona de interaccion en pares de difusion a 550 grados C U-Mo-Zr/Al y U-Mo-Zr/Al-A356

    Energy Technology Data Exchange (ETDEWEB)

    Komar Varela, Carolina; Arico, Sergio; Mirandou, Marcela; Balart, Silvia; Gribaudo, Luis [Comision Nacional de Energia Atomica, General San Martin (Argentina). Dept. de Materiales; com, carolinakomar@gmail

    2007-07-01

    Out-of-pile diffusion experiments were performed between U-7 wt.% Mo-1 wt.% Zr and Al or Al A356 (7,1 wt.% Si) at 550 C degrees. In this work morphological characterization and phase identification on both interaction layers are presented. They were carried out by the use of different techniques: optical and scanning electron microscopy, X-ray diffraction and WDS microanalysis. In the interaction layer U-7 wt.% Mo-1 wt.% Zr/Al, the phases UAl{sub 3}, UAl{sub 4}, Al{sub 20}Mo{sub 2}U and Al{sub 43}Mo{sub 4}U{sub 6} were identified. Similar results in the interaction layer of the U-7 % Mo/Al at 580 C degrees were previously obtained. In the interaction layer U-7 wt.% Mo-1 wt.% Zr/Al A356, the phases U(Al,Si){sub 3} with 25 at.% Si and Si{sub 5}U{sub 3} were identified. This last phase, with a higher Si concentration, was identified with X-ray diffraction synchrotron radiation performed at the National Synchrotron Light Laboratory, Campinas, Brazil. (author) [Spanish] Se realizaron experiencias fuera de reactor en pares de difusion quimica U-7 % Mo-1 % Zr/Al y U-7 % Mo-1 % Zr/Al A356. En este trabajo se presentan los resultados de la caracterizacion morfologica e identificacion de fases presentes en la zona de interaccion que se forma al ser sometidos a un tratamiento isotermico de 1,5 h a 550 grados C. Las tecnicas utilizadas fueron: microscopia optica y electronica de barrido, difraccion de rayos X y microanalisis cuantitativo por sonda electronica. En la zona de interaccion correspondiente al par U-7 % Mo-1 % Zr/Al se identificaron las fases UAl{sub 3}, UAl{sub 4}, Al{sub 20}Mo{sub 2}U y Al{sub 43}Mo{sub 4}U{sub 6}. Estas cuatro fases fueron identificadas en pares U-7 % Mo/Al a 580 grados C en trabajos anteriores. En la zona de interaccion correspondiente al par U-7 % Mo-1 % Zr/Al A356 se identificaron las fases U(Al,Si){sub 3} (con una concentracion de 25 %at.Si) y Si{sub 5}U{sub 3}. Este compuesto rico en Si solo pudo ser identificado mediante la utilizacion de

  10. Characterization of the voltage control systems and speed of a synchronous machine of high power for short circuit testing; Caracterizacion de los sistemas de control de voltaje y velocidad de una maquina sincrona de alta potencia para pruebas de corto circuito

    Energy Technology Data Exchange (ETDEWEB)

    Segura Ozuna, Victor Octavio; Hernandez Rodriguez, Isaura Victoria; Alcaide Godinez, Indira Xochiquetzal; Garduno Ramirez, Raul; Montero Cervantes, Julio Cesar [Instituto de Investigaciones Electricas, Cuernavaca, Morelos (Mexico); Ruiz Rodriguez, Genaro; Martinez Torres; Ricardo [CFE-LAPEM, Irapuato, Guanajuato (Mexico)

    2012-07-01

    This paper introduces a characterization of the behavior of the speed and voltage control systems of a special purpose synchronous machine (GCC) based on measuring and monitoring physical signals, and recording of the sampled waveforms. Basically, the GCC supplies the energy to perform high-power short-circuits tests to certify electrical equipment and components, as required by the Comision Federal de Electricidad (CFE) in Mexico. The GCC operates alternately as motor and generator. With the GCC operating as motor, speed control during startup, acceleration, re-acceleration and braking is carried out by a static frequency converter (SFC). Complementary, the voltage controller manipulates excitation power to control terminal voltage when the GCC operates as generator and regulates excitation current when the GCC operates as motor. Compared to conventional voltage regulation systems, which must go off in case of short-circuit, the GCC voltage regulator must keep controlling field excitation to maintain the required line current and terminal voltage during short-circuit tests. Monitoring of physical signals was carried out with a portable data acquisition system based on SCXI and PXI digital platforms. A total of 78 signals were monitored with a 6 kHz sampling rate that was enough to obtain detailed signal waveforms. Data captured was processed and plotted for analysis. The signal graphs show the current real behavior of both, the voltage control system and the speed control system, and constitute a precise characterization of their behavior. [Spanish] Este documento presenta una caracterizacion del comportamiento de los sistemas de control de velocidad y voltaje de una maquina sincrona de proposito especial (GCC) basada en la medicion y monitoreo de senales fisicas, asi como en el registro de las formas de onda muestreadas. Basicamente, la GCC suministra la energia para efectuar pruebas de corto circuito de alta potencia para certificar equipo y componentes

  11. An ab initio molecular

    Indian Academy of Sciences (India)

    mechanisms of two molecular crystals: An ab initio molecular dynamics ... for Computation in Molecular and Materials Science and Department of Chemistry, School of ..... NSAF Foundation of National Natural Science Foun- ... Matter 14 2717.

  12. RELAÇÕES ENTRE ENSINO E APRENDIZAGEM NA EJA

    Directory of Open Access Journals (Sweden)

    José Moisés Nunes da Silva

    2010-01-01

    Full Text Available Este artigo tem por objetivo apresentar uma distinção clara e objetiva entre os processos de ensinar e aprender. Nessa perspectiva, primeiramente destaca a educação no contexto e como parte integrante dos processos de transformações do mundo contemporâneo. Em seguida, sustentado por diversos autores, discute-se a distinção entre ensinar e aprender. Espera-se contribuir para uma reflexão sobre a prática pedagógica docente e da necessidade de melhoria do processo de ensino e aprendizagem a fim de possibilitar uma educação em consonância com a concepção de formação integral do cidadão, à medida que tal distinção seja introjetada pelos professores. PALAVRAS-CHAVE: Ensinar. Aprender. Aprendizagem do jovem e do adulto.

  13. Afetividade entre professor e aluno no processo ensino-aprendizagem

    Directory of Open Access Journals (Sweden)

    Jéssica Simone Galdino Schaefer

    2015-06-01

    Full Text Available Este artigo tem como objetivo analisar as relações de afetividade entre professor e aluno no processo ensino-aprendizagem. Utiliza de metodologia com abordagem qualitativa, observação participante, e entrevistas semi-estruturadas. O lócus da pesquisa foi a Escola Municipal de Educação Básica Lizamara Aparecida Oliva de Almeida em Sinop, entre Fevereiro e Maio de 2014. Enquanto sujeitos, contou-se com professores e alunos do 3º ano do Ensino Fundamental. Dos resultados parciais, verificou-se que mesmo que a afetividade e a aprendizagem sejam reconhecidas teoricamente por Henri Wallon como elos fundamentais para o processo ensino-aprendizagem, ainda não é bem compreendido pelos sujeitos professores. Palavras-chave: psicologia educacional; afetividade; professores e alunos. 

  14. Relações entre geografia e natureza

    Directory of Open Access Journals (Sweden)

    Jérome FOURNIER

    2001-12-01

    Full Text Available Este artigo aborda as relações entre geografia e natureza a partir dos seguintes tópicos: A geografia - uma ciência dos lugares e dos homens? Como definir a geografia física? A biogeografia e as relações com as disciplinas conexas. As contribuições da teoria da ecologia da paisagem. A paisagem deve ser estudada a partir de uma perspectiva sistêmica - geosistêmica, portanto interdisciplinar.

  15. Entre el erotismo y la pornografía

    Directory of Open Access Journals (Sweden)

    Edmundo Ribadeneira

    2015-01-01

    Full Text Available ¿Dónde termina el erotismo y comienza la pornografía? ¿Cuál el lugar de la obscenidad? Son algunas de las inquietudes que el autor aborda al tratar sobre estas tres expresiones de la sexualidad humana, que se ubican entre la indecencia más crasa y la imaginación artística, bastante atravesadas por la obscenidad de la política y el mercantilismo

  16. Association entre les hormones sexuelles, les marqueurs de ...

    African Journals Online (AJOL)

    Introduction: Le présent travail se propose d'étudier la relation entre les hormones sexuelles, notamment l'oestradiol et l'indice de l'oestradiol libre, le sulfate de déhydroépiandrosterone et la sex hormone binding globulin, les marqueurs de remodelage osseux et la densité minérale osseuse chez une population de ...

  17. Factores socioculturales y consumo de drogas entre estudiantes universitarios costarricenses

    Directory of Open Access Journals (Sweden)

    Jaime Alonso Caravaca Morera

    2015-01-01

    Full Text Available Investigación cuantitativa de tipo descriptiva-exploratoria, con diseño transversal que examinó el efecto moderador de ciertos factores socio-culturales en el consumo de drogas entre estudiantes universitarios en San José, Costa Rica. La muestra fue conformada por 126 mujeres y 124 hombres de una universidad pública de forma no probabilística. Fue elaborado un cuestionario con cinco escalas ya validadas, que interrogaba sobre la influencia del grupo de pares, las relaciones familiares, el entretenimiento, la espiritualidad y el consumo de drogas. Se utilizó el programa SPSS versión 18 para el análisis estadístico. Se estableció que el 98,4% de los estudiantes reportaron tener por lo menos un amigo que consumía drogas, las drogas más consumidas fueron alcohol, tabaco y marihuana. Se estableció asociación significativa entre algunos factores académicos y culturales con el consumo de drogas legales e ilegales. Se concluye que deben ser implementadas estrategias preventivas considerando la influencia de los factores culturales entre los estudiantes universitarios.

  18. Diálogo entre el islamismo y occidente

    Directory of Open Access Journals (Sweden)

    Ana María MARTÍN GÓMEZ

    2011-05-01

    Full Text Available Este artículo analiza uno de los fenómenos más actuales de nuestras sociedades pluralistas y multiculturales: el encuentro entre la civilización occidental y la islámica. La elaboración de esta nota crítica se ha llevado a cabo tras la lectura de tres libros fundamentales acerca de esta temática: Un paseo por el laberinto. Sobre política y religión en el diálogo entre civilizaciones, de José María García Gómez-Heras, Laicismo, agnosticismo y fundamentalismo de Antonio García-Santesmases, y El islamismo contra el Islam. Las claves para entender el terrorismo yihadista, de Gustavo de Arístegui. A partir de estos tres ensayos, se ha emprendido un estudio filosófico de la situación actual entre el islamismo y Occidente.

  19. Proyectos educativos: estudio comparativo entre Venezuela y Colombia

    Directory of Open Access Journals (Sweden)

    Mineira Finol

    2005-09-01

    Full Text Available El Proyecto Educativo Integral Comunitario (PEIC y el Proyecto Educativo Institucional constituyen la categoría de comparación entre Venezuela y Colombia; a tal fin, este estudio de tipo comparativo-documental se centró en determinar congruencias y discrepancias entre PEIC y PEI, utilizando el método comparativo estructurado en cuatro fases: descripción, interpretación, yuxtaposición y comparación, propuesto por Hilker y Bereday (1972 Entre los resultados se tienen: congruencias en cuanto surgen sobre las bases de diagnóstico externos efectuados por organismos internacionales UNESCO, CEPAL ante la inefectividad y baja productividad de ambos países; a nivel interno responden a políticas educativas reformadoras de currículum y leyes,. Discrepancias referidas al tiempo de implementación; en Venezuela a partir de 1996; Colombia en 1992; este último, consolidó las bases para la participación a través del gobierno escolar y de un sistema de evaluación institucional, muy incipiente en Venezuela.

  20. La Vocación entre los Aspirantes a Maestro

    Directory of Open Access Journals (Sweden)

    Encarnación Sánchez Lissen

    2003-01-01

    Full Text Available El contenido que ofrecemos en este artículo hace referencia a la dimensión vocacional de los aspirantes a maestro. Tradicionalmente, la enseñanza se ha considerado como una profesión genuinamente vocacional; una circunstancia que, sin embargo, no siempre le ha favorecido. En estos momentos, a pesar de las dificultades que rodean la tarea docente, existe un alto número de estudian-tes que optan por la enseñanza y acceden a las Escuelas de Magisterio. Real-mente, nos podríamos preguntar si el docente -nace o se hace- vocacional hacia esta actividad profesional. Aportamos para ello, los datos de una investigación realizada entre estu-diantes de la Universidad de Sevilla, donde se viene a demostrar por un lado que, muchos eligieron la carrera sin tener un verdadero interés por ella; y por otro, que las Escuelas de Magisterio son en muchos casos, un motor esencial para llegar a despertar o, a descubrir entre los estudiantes, su verdadero interés e inclinación por la enseñanza. Posiblemente, desarrollar actitudes vocaciona-les entre tos aspirantes a maestro es, también, una labor implícita de la Forma-ción Inicial de Maestros

  1. Causalidade entre as principais bolsas de valores do mundo

    Directory of Open Access Journals (Sweden)

    Hiron Pereira Farias

    2010-04-01

    Full Text Available O objetivo deste trabalho foi analisar os mercados dos países emergentes que fazem parte do Bric, com exceção da Índia, buscando mostrar como os mercados do Brasil, da Rússia e China se comportam entre si e em relação ao mercado dos Estados Unidos. Analisou-se também como alguns países desenvolvidos do grupo G8, Estados Unidos, Reino Unido e Japão, se comportam. Em cada análise, ajustou-se um modelo VAR e buscou-se verificar o grau de dependência dentro e entre cada grupo, utilizando teste de causalidade de Granger, critérios de seleção de modelos, função resposta a impulso e decomposição da variância do erro de previsão. Nas análises realizadas, os mercados brasileiro e americano mostraram forte influência sobre os demais mercados, e, na análise entre os grupos, consideraram-se o mercado dos Estados Unidos do grupo ERJ e todos os mercados emergentes do grupo BRC. O mercado americano mostrou forte influência sobre os outros mercados.

  2. Relación entre el receptor de la favina y la galactosil uridil transferasa de la membrana de eritrocitos

    Directory of Open Access Journals (Sweden)

    María Inés Silva

    2010-07-01

    Full Text Available La extracción y purificación de un receptor de la favina fue realizada a partir de la membrana de eritrocitos, empleando para ello básicamente la cromatografía de intercambio iónico sobre DEAE-celulosa con miras a establecer su relación con la actividad de la Galactosa 1-fosfato Uridil Transferasa (EC 2.7.7.12, OUT. Se obtuvo una proteína con un alto grado de pureza (determinada por electroforesis sobre poliacrilamida en ausencia y presencia de SDS que presenta un peso molecular de 58.000 daltons y otra fracción que también interacttía con la favina y que contiene por lo menos seis proteínas de pesos moleculares entre 23.000 y 71.000 daltons. La fracción cromatográfica que contiene la proteína de 58.000 daltons presenta actividad de OUT, sin embargo esta actividad es inestable y se pierde después de mantener la muestra a 4'C durante 24 horas. De acuerdo a nuestros resultados, la dos actividades (receptor y actividad enzimática no interfieren entre si a pesar de encontrarse sobre la misma fracción proteica.

  3. PAPEL DE LA CONFIANZA en las relaciones entre organizaciones

    Directory of Open Access Journals (Sweden)

    Irene Juana Guillén Mondragón

    2006-07-01

    Full Text Available El objetivo del presente documento es analizar las definiciones y la importancia de la confianza para crear relaciones de cooperación entre organizaciones de naturaleza distinta. Se hace referencia a los modelos de organización dominantes para acercarnos a los nuevos mecanismos de regulación social propuestos por la sociología para tratar la organización, debido a que en el contexto actual las nuevas concepciones de la organización del trabajo han promovido en las organizaciones formas distintas de competir en el mercado. Procesos de cambio que obligan a las organizaciones a construir una nueva identidad y a renovar los contratos psicológicos con sus integrantes. La noción de confianza ha sido llevada del ámbito social al organizacional con la finalidad de lograr acuerdos entre organizaciones y al mismo tiempo lograr el compromiso de los integrantes de tales entidades. Para que estas puedan funcionar bajo este marco de transformaciones requieren de relaciones de colaboración regidas por la  confianza; relaciones que se dan en los niveles individual, dentro de la organización, entre organizaciones e institucionalmente. Los diferentes niveles de confianza están presentes en las relaciones que entablan los individuos, tanto dentro de la organización como en su entorno. Algunas de las reflexiones en torno a esta problemática nos llevan a pensar que el papel de la confianza es dinámico e incide en la transferencia y el intercambio de conocimientos, técnicas y procedimientos científicos, tecnologías, productos, capitales, entre otros. Además, las relaciones fundadas en la confianza requieren de la suspensión del propio interés, en beneficio de unaorientación colectiva (Mangematin y Thuderoz, 2003. Sin embargo, también se reconoce que con todo y la posibilidad que el hombre tiene de deliberar y de generar confianza, es evidente que entre los hombres prevalecen tanto la confianza calculada como los deseos de altruismo para entrar

  4. Molecular HIV screening.

    Science.gov (United States)

    Bourlet, Thomas; Memmi, Meriam; Saoudin, Henia; Pozzetto, Bruno

    2013-09-01

    Nuclear acid testing is more and more used for the diagnosis of infectious diseases. This paper focuses on the use of molecular tools for HIV screening. The term 'screening' will be used under the meaning of first-line HIV molecular techniques performed on a routine basis, which excludes HIV molecular tests designed to confirm or infirm a newly discovered HIV-seropositive patient or other molecular tests performed for the follow-up of HIV-infected patients. The following items are developed successively: i) presentation of the variety of molecular tools used for molecular HIV screening, ii) use of HIV molecular tools for the screening of blood products, iii) use of HIV molecular tools for the screening of organs and tissue from human origin, iv) use of HIV molecular tools in medically assisted procreation and v) use of HIV molecular tools in neonates from HIV-infected mothers.

  5. Understanding molecular structure from molecular mechanics.

    Science.gov (United States)

    Allinger, Norman L

    2011-04-01

    Molecular mechanics gives us a well known model of molecular structure. It is less widely recognized that valence bond theory gives us structures which offer a direct interpretation of molecular mechanics formulations and parameters. The electronic effects well-known in physical organic chemistry can be directly interpreted in terms of valence bond structures, and hence quantitatively calculated and understood. The basic theory is outlined in this paper, and examples of the effects, and their interpretation in illustrative examples is presented.

  6. Relación entre el consumo de drogas y maltrato infantil entre estudiantes universitarios de la universidad en Colombia

    Directory of Open Access Journals (Sweden)

    Monica Rosaura Garcia Baquero

    2015-01-01

    Full Text Available Esta investigación examina la relación entre el uso de drogas en estudiantes de una Universidad Pública en Villavicencio, Colombia, y su relación con el maltrato durante la niñez, utilizando como referente teórico la perspectiva bioecológica. Estudio exploratorio retrospectivo, con una muestra de 313 estudiantes de pregrado. El 10.2% de los encuestados refiere haber sido maltratado en la Infancia y la violencia de mayor uso fue la violencia física seguida de la violencia psicológica. El 56.9% de las estudiantes encuestados han consumido sustancias psicoactivas en algún momento de la vida, y su inicio entre los 13 y los 18 años. Se evidencia maltrato en la infancia con manifestaciones de agresiones físicas, al igual que el consumo de sustancias psicoactivas, pero no se observa una relación estadísticamente significativa entre maltrato durante la infancia y el consumo de sustancias psicoactivas en la muestra estudiada.

  7. Entre propietarios y migrantes: los encuentros y desencuentros entre Colonos y Aguarunas en el alto mayo”

    Directory of Open Access Journals (Sweden)

    Kenneth E. Garces Montes

    2013-10-01

    Full Text Available La dinámica de conflictos entre colonos y nativos en el Alto Mayo, ha dado como producto continuosenfrentamientos entre caseríos de colonos y comunidades nativas colindantes, así como una seriede procesos judiciales por “usurpación de tierras”, en los cuales no se logra una ejecución efectiva dela sentencia a pesar que esta sea favorable a los nativos, debido a la distancia social que existe entrelos operadores estatales y el conflicto real. Por su parte los mecanismos de convivencia entre colonosy nativos se inician mediante el alquiler de tierras, diseñada como una fórmula temporal para quelos colonos se retiren una vez vencido el plazo del alquiler, sin embargo la ampliación de los plazosprovoca que los mismos adquieran vocación de permanencia.Una serie de actores, de primer, segundo y tercer orden interactúan alrededor de las dos dinámicasde relacionamiento mencionadas; tales como las ONGs, el Estado, organizaciones indígenas, einclusive mafias de traficantes de tierras. Ante esta realidad tan compleja conviene hacer el ejerciciode plantear propuestas de adaptabilidad (o subsistencia de las comunidades nativas, en las quese visualice la supervivencia de lo local frente a lo global en lo que a demarcación de tierras de lascomunidades nativas se refiere.

  8. Entre-sons, entre-mundos, entre-idades: ações dialógicas, cultura adolescente e educação musical

    OpenAIRE

    Vertamatti, Leila Rosa Gonçalves [UNESP

    2012-01-01

    O presente trabalho tem como ponto central a reflexão a respeito da prática da Educação Musical de jovens entre 11 e 14 anos, do Colégio São José de São Bernardo do Campo, a partir de uma proposta que dialogue com o universo do adolescente, a invenção, a percepção do ambiente acústico, visual, social e cultural e o contexto escolar. A principal questão da investigação é a discussão de processos de elaboração de ações musicais com base em um conceito de prática que leve em conta a distância ex...

  9. La disciplina entre las disposiciones legales y los actores escolares

    Directory of Open Access Journals (Sweden)

    Nancy Palacios Mena

    2013-01-01

    Full Text Available Este artículo presenta una descripción del funcionamiento de la disciplina escolar en una institución educativa de secundaria en Colombia. Tiene como objetivo explicar el origen del conflicto disciplinario, las situaciones que lo generan, la forma como la institución trata de lograr y mantener la disciplina, las explicaciones que cada uno de los actores da a las situaciones conflictivas y la manera como son vividas por ellos. El diseño metodológico de la investigación combinó una encuesta, entrevistas y el análisis de documentos de la institución educativa. El análisis de los datos se hace a la luz de planteamientos sociológicos que reconocen la enorme importancia que ejercen las estructuras sociales sobre la forma de pensar y actuar de los individuos, pero también resaltan la gran capacidad de los actores sociales para amoldarse a dichas estructuras y a través de sus ideas y acciones darle una dinámica propia al tipo de relaciones que establecen entre individuos en sus entornos de vida más inmediatos. Se pudo concluir que sobre la disciplina escolar no hay unidad de criterio entre los docentes, los directivos y los estudiantes, ni en su definición, ni en su importancia, ni en los medios para conseguirla; dichas diferencias producen tensiones y desacuerdos entre los miembros de la comunidad educativa.

  10. L’approche sociopsychologique de Horkheimer, entre Fromm et Adorno

    Directory of Open Access Journals (Sweden)

    Katia Genel

    2010-08-01

    Full Text Available Le cadre du programme interdisciplinaire de recherche défini par Max Horkheimer dans les années 1930 doit beaucoup à Erich Fromm, qui a introduit la psychologie sociale dans la Théorie critique de la société. Or, une décennie plus tard, Fromm est la cible privilégiée des attaques et sa théorie apparaît désormais comme incompatible avec les positions défendues par Horkheimer et Adorno. Partant de ces tensions qui ont marqué l’histoire de l’École de Francfort, le présent article vise à éclaircir le déplacement qu’elles traduisent sur le plan épistémologique. Si Horkheimer et Fromm partagent des prémisses communes, le premier, dans son travail avec Adorno, se rapproche de manière croissante de la doctrine freudienne alors que le second s’en éloigne. Nous voudrions montrer que l’accord entre Fromm et Horkheimer fut surtout négatif puisqu’il portait sur la critique de Freud : les divergences entre les deux penseurs apparaissent clairement, dès lors qu’on pose en profondeur la question de l’usage de la psychanalyse pour analyser l’un des problèmes centraux de la théorie de la société, l’antagonisme entre individu et société.

  11. Consumo de alcohol entre estudiantes Mexicanos de medicina

    OpenAIRE

    Puig-Nolasco,Angel; Cortaza-Ramirez,Leticia; Cristina Pillon,Sandra

    2011-01-01

    Este estudio tiene por objetivo identificar el patrón de consumo de alcohol entre los estudiantes mexicanos de medicina. Se trata de un estudio transversal realizado en la Universidad Veracruzana, en México, con 263 estudiantes (84,4%). El cuestionario contiene la Prueba de Identificación de Trastornos por el Uso del Alcohol y el Cuestionario de Estudiantes 2006. Los sujetos eran 60% mujeres, jóvenes. El uso en la vida fue de 71,9% y la edad de inicio 12,5 años. La frecuencia del consumo fue ...

  12. Relaciones entre matutinidad-vespertinidad y estilos de personalidad

    OpenAIRE

    Díaz Morales, Juan Francisco; Aparicio García, Marta Evelia

    2003-01-01

    El propósito de este estudio es analizar los perfiles diferenciales de personalidad según la tipología circadiana en un grupo de 189 personas, a los que se aplicó la Escala Compuesta de Matutinidad (Smith, Reilly y Midkniff, 1989), traducida y adaptada a la población española por Díaz Ramiro (2000) y el Inventario Millon de Estilos de Personalidad (Millon, 1994), traducido y adaptado a la población española (Millon, 2001). Se han estudiado las relaciones entre ...

  13. Fronteiras entre meios e formas em Cabra marcado para morrer

    OpenAIRE

    Hamburger,Esther Império

    2017-01-01

    Resumo O documentário Cabra marcado para morrer (1964-1984) apresenta uma combinação original de elementos oriundos da prática do Centro Popular de Cultura da União Nacional dos Estudantes (CPC da UNE) que produziu o filme, da experiência televisiva do diretor na equipe do Globo Repórter e da prática dos cinemas diretos. Identificar nos fragmentos de materiais filmados pelo CPC entre 1962 e 1964 em diversos locais do Nordeste e compilados com materiais filmados no início dos anos 1980 de mane...

  14. Procedimientos para detectar y medir el sesgo entre observadores

    OpenAIRE

    Benavente, Ana; Alto, Manuel; López, Juan José

    2006-01-01

    En este trabajo se realiza un análisis de los distintos métodos para detectar y medir el sesgo entre observadores desde dos perspectivas básicas: el enfoque clásico, fundamentado en índices descriptivos y el enfoque del modelado, fundamentado en modelos loglineales. Se demuestra que estas medidas no son satisfactorias para detectar y medir el sesgo de forma unívoca porque presentan resultados contradictorios y se proponen nuevas alternativas a desarrollar que permitan descomponer correctament...

  15. Estudio comparativo entre SIG propietario y SIG libre

    OpenAIRE

    Mesa Díaz, Juan Ramón

    2008-01-01

    Estudio comparativo entre SIG propietario y SIG libre, focalizado en los casos particulares de Geomedia Pro (SIG Propietario) y gvSIG (SIG Libre). En el estudio se procede a determinar cuáles son los aspectos destacables de un SIG, para poder evaluarlos, posteriormente, en los dos SIG objeto del estudio y obtener una ponderación definitoria de cada SIG. A continuación, algunos de los aspectos evaluados en cada SIG: interoperabilidad, conexión a bases de datos espaciales, aspectos económ...

  16. De embajadas y regalos entre califas y emperadores

    OpenAIRE

    Valdés Fernández, Fernando

    2013-01-01

    Este artículo se centra en las relaciones que mantuvo el Califato de Córdoba con las principales potencias políticas de la Europa medieval en el siglo x. Estos contactos, que se establecían a través de embajadas sometidas a un rígido protocolo, se interpretarán analizando las misiones diplomáticas de Juan de Gorze, de Recemundo, de Liutprando de Cremona y el papel jugado, también, por Hasday Ibn Shaprut. Igualmente, se analizará el prolijo intercambio entre embajadas en su vert...

  17. Entre el desarrollo y el ambiente: incertidumbres de los agrocombustibles

    OpenAIRE

    León Sicard, Tomás Enrique

    2008-01-01

    El artículo plantea una discusión sobre la manera en que la dimensión ambiental puede ser concebida en relación con el actual concepto de desarrollo, a partir de una visión que entiende lo ambiental como relaciones complejas entre los ecosistemas y las culturas humanas y a partir de este punto, examina el modelo agrario dominante en Colombia versus los modelos de agricultura alternativa y la aparición de los biocombustibles, como una consecuencia ineludible del modelo domi...

  18. Revisión entre pares como instrumento de aprendizaje

    OpenAIRE

    Crespo García, Raquel; Villena Román, Julio

    2005-01-01

    Proyecto de Innovación Docente en las asignaturas de Organización de Contenidos Audiovisuales y e Inteligencia en Redes de Comunicaciones Este artículo describe la experiencia de innovación docente llevada a cabo este último curso basada en la aplicación de la metodología de revisión entre iguales como instrumento para el aprendizaje, desarrollada en las asignaturas Organización de Contenidos Audiovisuales (Ingeniería Técnica de Telecomunicación, especialidad Sonido e Imagen) durante el cu...

  19. A Europa no Mundo Entre as Guerras 1919-1939

    OpenAIRE

    Rollo, Maria Fernanda; Ribeiro, Maria Manuela Tavares; Pires, Ana Paula; Cunha, Alice; Valente, Isabel Maria Freitas

    2014-01-01

    O II Encontro A Europa no Mundo é dedicado ao estudo, análise, debate e interpretação das transformações políticas, económicas, sociais e culturais ocorridas na Europa durante o período entre guerras. Os textos compilados neste e-book correspondem a uma parte das comunicações apresentadas no Encontro, reflectem a investigação realizada e procuram constituir um ponto de partida para novas e mais aprofundadas reflexões.

  20. Interfaces entre funções executivas, linguagem e intencionalidade

    OpenAIRE

    Tonietto,Lauren; Wagner,Gabriela Peretti; Trentini,Clarissa Marceli; Sperb,Tania Mara; Parente,Maria Alice de Mattos Pimenta

    2011-01-01

    A relação entre linguagem e funções executivas, também conhecidas como funções cognitivas complexas, já foi estabelecida no passado por Luria e Vygotsky. Este artigo tem por objetivo revisar o conceito de funções executivas sob as perspectivas neuropsicológica e cognitiva. Alguns dos reconhecidos modelos sobre processamento das funções executivas são apresentados, assim como estudos recentes sobre funções executivas em crianças. O desenvolvimento das funções executivas é discutido sob o ponto...

  1. Sintomas e fatores de risco para asma entre escolares piauienses

    OpenAIRE

    Castro, Gessianne Carvalho; Sousa, Lívia Kênia de Carvalho; Vera, Paula Valentina de Sousa; Lima, Luisa Helena de Oliveira; Oliveira, Edina Araújo Rodrigues; Lima, Rúbia Fernanda Santos; Magalhães, Luis Fernando Beserra; Araújo, Nileide Lima; Lopes, Marcos Venícios de Oliveira

    2012-01-01

    OBJETIVOS: Analisar a prevalência de sintomas de asma entre escolares de seis a sete anos do município de Picos-PI; e identificar fatores de risco associados à doença. MÉTODOS: Estudo transversal realizado com crianças de 6 e 7 anos de Picos em novembro de 2010 a maio de 2011. Para coletar os dados, foi utilizado um formulário adaptado do Internacional Study of Asthma and Allergies in Childhood. Os dados foram analisados com base na estatística descritiva e analítica. RESULTADOS: Dentre as 23...

  2. Relaciones entre estilos de amor y violencia en adolescentes

    OpenAIRE

    Iris Xóchitl Galicia Moyeda; Alejandra Sánchez Velasco; Francisco Javier Robles Ojeda

    2013-01-01

    De acuerdo a diversas evidencias, la manera en que los y las ado- lescentes establecen sus relaciones amorosas podría estar asociada con la violencia producida y recibida en el noviazgo. Para esclarecer cómo se manifiesta esta relación en una muestra de 105 mujeres y 93 hombres, con una edad entre los 13 y los 15 años, en el Estado de México, se aplicaron dos herramientas: la Escala de Actitudes Amo- rosas (EAA) (Hendrick & Hendrick, 1986) y el Cuestionario sobre Violencia en el Noviazgo (CVN...

  3. Transa: Arquitectura brasileira entre o Modernismo e o Tropicalismo

    OpenAIRE

    Maria João Trigo Moutinho Rito

    2015-01-01

    Brasil do "terceiro mundo", déspota, paternalista mas tropical. Assim seria o Brasil,dos anos 60, percepcionado por aqueles que, conscientes da realidade politica e social dopaís, não aceitavam a sua desvalorização, condenando os estereótipos e criando uma posiçãoanti-colonialista. Por entre as palavras imagéticas de Oswald de Andrade, fixavam-se registosreferenciais geradores de um caminho ao encontro da felicidade do Brasil anterior à chegada dosportugueses. A necessidade de fugir ao provin...

  4. Molecular sensors and molecular logic gates

    International Nuclear Information System (INIS)

    Georgiev, N.; Bojinov, V.

    2013-01-01

    Full text: The rapid grow of nanotechnology field extended the concept of a macroscopic device to the molecular level. Because of this reason the design and synthesis of (supra)-molecular species capable of mimicking the functions of macroscopic devices are currently of great interest. Molecular devices operate via electronic and/or nuclear rearrangements and, like macroscopic devices, need energy to operate and communicate between their elements. The energy needed to make a device work can be supplied as chemical energy, electrical energy, or light. Luminescence is one of the most useful techniques to monitor the operation of molecular-level devices. This fact determinates the synthesis of novel fluorescence compounds as a considerable and inseparable part of nanoscience development. Further miniaturization of semiconductors in electronic field reaches their limit. Therefore the design and construction of molecular systems capable of performing complex logic functions is of great scientific interest now. In semiconductor devices the logic gates work using binary logic, where the signals are encoded as 0 and 1 (low and high current). This process is executable on molecular level by several ways, but the most common are based on the optical properties of the molecule switches encoding the low and high concentrations of the input guest molecules and the output fluorescent intensities with binary 0 and 1 respectively. The first proposal to execute logic operations at the molecular level was made in 1988, but the field developed only five years later when the analogy between molecular switches and logic gates was experimentally demonstrated by de Silva. There are seven basic logic gates: AND, OR, XOR, NOT, NAND, NOR and XNOR and all of them were achieved by molecules, the fluorescence switching as well. key words: fluorescence, molecular sensors, molecular logic gates

  5. El (los Sur buscando al Sur. Una construcción entre estereotipos y realidad.

    Directory of Open Access Journals (Sweden)

    Mabel Franzone

    2010-11-01

    Full Text Available Todas las lecturas que podamos hacer del Sur, de sus propias representaciones, de aquellas vehiculizadas por el Norte, de sus creaciones, de sus reacciones, de su búsqueda constante de identidad, son lecturas de múltiples situaciones, que llaman a cruces insoslayables entre pueblos, entre distintas etnias, entre disciplinas, entre sentimientos que van desde el rechazo hasta la atracción casi magnética entre los dos hemisferios. Nuestra intención primera era la de reunir de manera aproximativa las problemáticas actuales de los Sur, ligadas a lo imaginario.

  6. Prazer e sofrimento entre os trabalhadores de Call Center

    Directory of Open Access Journals (Sweden)

    Carolina Scolari

    2009-12-01

    Full Text Available Os conceitos de Taylor foram fundamentais para o desenvolvimento industrial no século XX. Ainda hoje, seus ensinamentos estão presentes em diversos ramos da economia, inclusive, no setor de call center. Call center é uma estrutura que visa ao atendimento de clientes com a utilização de um terminal de computador e de um aparelho telefônico. Esse setor sofreu grande expansão e, em 2006, foi responsável pela geração de 60 mil empregos diretos, tornando-se uma forma de contato e negócios atrativa para empresas do ramo público e privado. O objetivo deste artigo foi analisar as vivências de prazer e sofrimento no trabalho entre os operadores de call centers. Foi realizada uma pesquisa qualitativa, estratégia de estudo de caso e método de análise dos dados, análise de conteúdo. Como resultados, foram elaboradas algumas categorias finais, entre elas as mediações no trabalho, analisada no presente artigo sob o referencial teórico da psicodinâmica do trabalho.

  7. Metamorfoses nas vanguardas: entre o homem e o animal

    Directory of Open Access Journals (Sweden)

    Kelvin Falcão Klein

    2011-08-01

    Full Text Available Este trabalho investiga a relação que se estabeleceu entre o homem e o animal no pensamento das vanguardas européias no início do século XX, principalmente o surrealismo, além de considerar uma parte de suas bases históricas e de suas sobrevivências na contemporaneidade. Partindo do caso de Édipo e da Esfinge, e das diferentes percepções críticas que gerou (desde Freud até Jacques Lacan e Giorgio Agamben, este trabalho reflete sobre as estratégias de afirmação do discurso da razão e da verdade na cultura ocidental, alcançando, com isso, o projeto de revistas de vanguarda como Acéphale e Minotaure. A categoria de metamorfose, na articulação com outros casos, é utilizada para considerar as implicações críticas do questionamento das fronteiras entre o homem e sua animalidade.

  8. Conflictos entre derechos constitucionales y maneras de resolverlos

    Directory of Open Access Journals (Sweden)

    Moreso, José Juan

    2010-10-01

    Full Text Available This paper deals with the question of the conflict of constitutional rights which acknowledge basic rights. It is shown that there are two extreme accounts: the subsumptive approach and the particularist approach that embody two main conceptions of practical rationality. Between both approaches there is room for a range of options. Two of them are taken into account: the proportionalist approach, which conserves the scope of rights restricting their stringency, and it is argued in favour of the specificationist approach, which preserve the stringency of rights restricting their scope.

    En este trabajo se analiza la cuestión de la colisión entre principios constitucionales que reconocen derechos básicos. Se muestra que hay dos posiciones extremas: el enfoque subsuntivo y el enfoque particularista, que encarnan dos grandes concepciones de la racionalidad práctica. Entre ambos enfoques hay lugar para un amplio espectro de opciones. Se toman dos en cuenta: el enfoque proporcionalista, que conserva el alcance de los derechos restringiendo su fuerza y el enfoque especificacionista, a favor del cual se argumenta, que conserva la fuerza de los derechos restringiendo su alcance.

  9. Relações lineares entre caracteres de linho

    Directory of Open Access Journals (Sweden)

    Alberto Cargnelutti Filho

    2016-01-01

    Full Text Available RESUMO Os objetivos deste trabalho foram avaliar as relações lineares entre caracteres de linho (Linum usitatissimum L. e identificar caracteres para a seleção indireta. Em área experimental de 15 × 15 m (225 m2, aos 134 dias após a semeadura, foram selecionadas, aleatoriamente, 300 plantas. Em cada planta, foram mensurados os caracteres altura de planta, número de ramos, número de cápsulas, massa verde de cápsulas, massa verde de parte aérea sem cápsulas, massa verde de parte aérea, massa seca de cápsulas, massa seca de parte aérea sem cápsulas e massa seca de parte aérea. Para cada caractere, foi calculada a média e o coeficiente de variação. Foi investigada a relação linear entre os caracteres por meio de análises de correlação e de trilha. Na cultura de linho, o número de cápsulas tem relação linear positiva com as massas verde e seca de cápsulas e de parte aérea e pode ser utilizado para seleção indireta.

  10. Desarrollo convergente municipal entre estados contiguos a Nayarit y Sinaloa

    Directory of Open Access Journals (Sweden)

    Eduardo Meza-Ramos

    2010-01-01

    Full Text Available El análisis del crecimiento económico registra disparidades sectoriales que se manifiestan en el interior de los países, entre las áreas urbanas y las rurales; entre las regiones prósperas y las rezagadas. En México la política de liberalización comercial no se ha visto reflejada de manera generalizada en la riqueza de la población. Se evaluó la hipótesis de convergencia en el ámbito municipal de los estados de Chihuahua, Durango, Jalisco, Nayarit, Sinaloa, Sonora y Zacatecas; por los datos considerados en el estudio se puede argumentar la existencia de convergencia ¿ y ¿, pues en promedio, la desviación estándar en el año 1989 fue de 1.73 y disminuyó a 1.31 en 2006. La convergencia ¿ describe una relación negativa con un valor absoluto de su estadístico mayor a 2; con 95% de confianza. Cabe señalar que se cuenta con políticas sociales y sectoriales pero se carece de políticas públicas que promuevan el desarrollo regional.

  11. A LIBERDADE EM SARTRE: UNIDADE ENTRE PROJETO E ENGAJAMENTO

    Directory of Open Access Journals (Sweden)

    Josiane Fátima Wambier

    2003-01-01

    Full Text Available O objetivo deste trabalho é refletir a liberdade em Sartre, tendo como base os textos: O existencialismo é um humanismo (1945 e Questão de método, a célebre introdução de Crítica da razão dialética (1960. A liberdade em Sartre é um tema filosófico e literário. No início do processo de sua trajetória intelectual, ela é encerrada dentro do cogito cartesiano: “penso, logo existo”. Apesar de ser concebida como uma pura subjetividade, ela também é entendida como projeto que se realiza na ação através do engajamento do homem no mundo. Posteriormente, ela é remetida para o plano histórico e relacionada com a necessidade no interior de uma tensão dialética entre objetividade e subjetividade. Mesmo nesta fase, o núcleo central do conceito sartreano de liberdade é conservado: a unidade entre projeto e engajamento.

  12. entre la pirámide y el axolotl

    Directory of Open Access Journals (Sweden)

    Paula Andrea Marín Colorado

    2006-01-01

    Full Text Available En este artículo se presenta un acercamiento a la novela Materia dispuesta, del escritor mexicano Juan Villoro. En esta aproximación analítica se pretende dilucidar la conexión entre la obra literaria y el medio en el que se gesta, así como con el momento histórico recreado en la anécdota de la novela (el terremoto ocurrido en Ciudad de México en 1985; lo anterior con el objetivo de establecer la propuesta estética del autor en esta obra y su relación con la visión que construye Materia dispuesta sobre los procesos de Modernidad y Postmodernidad en Latinoamérica. Para tal propósito se recurrirá a las investigaciones literarias y sociológicas de Mijail Bajtín, Zigmunt Bauman, Carlos Monsiváis y Octavio Paz, entre otros.

  13. RELAÇÃO ENTRE MODERNIDADE ORGANIZACIONAL E COMPROMETIMENTO ORGANIZACIONAL

    Directory of Open Access Journals (Sweden)

    Vanessa Machado Arraes

    2017-04-01

    Full Text Available Este estudo tem por objetivo investigar a relação entre a modernidade organizacional e o comprometimento organizacional em empregados públicos das Sociedades de Economia Mista do Ceará. O trabalho foi baseado na abordagem de padrões de modernidade organizacional, propostos por Eboli (1996 nos moldes validados por Sant’Anna (2002 e na abordagem tridimensional de comprometimento organizacional proposta por Meyer, Allen e Smith (1993. Recorreu-se a análise fatorial exploratória e confirmatória para a validação das escalas e ao modelo de equações estruturais para a confirmação das hipóteses. A população da pesquisa foi composta por 479 empregados, tendo como amostra 339 respondentes. Numa avaliação geral, a modernidade das organizações foi classificada como moderada. O comprometimento afetivo e o normativo foram avaliados como altos, e o instrumental como moderado. Foi possível constatar, ainda, por meio da modelagem de equações estruturais uma relação positiva e significativa entre a modernidade organizacional e o comprometimento afetivo e normativo.

  14. Apoio social e saúde entre idosos

    Directory of Open Access Journals (Sweden)

    Ramos Marília P.

    2002-01-01

    Full Text Available O presente artigo trata da relação entre a saúde dos idosos e relacionamentos sociais, bem como na interpretação e entendimento desta problemática sob a luz de dois enfoques teóricos: um macro, centrado na Teoria da Integração Social de Emile Durkheim e outro micro, centrado na Teoria das Trocas, de Peter Blau, com ênfase na Teoria da Eqüidade. A integração social (freqüência de contatos pode ter efeitos negativos na saúde, mas isto tem de ser medido pela qualidade dos contatos. Algumas conclusões apresentadas indicam que as relações sociais têm um efeito na saúde, no sentido de que as pessoas, nas sociedades modernas, esperam a reciprocidade, e, quando isto não é possível, principalmente na fase do envelhecimento, as pessoas sentem-se dependentes, e isso pode afetar a saúde de diferentes maneiras. Por outro lado, quando as pessoas têm problemas de saúde, elas experienciam uma falta de relações sociais balanceadas devido à incapacidade para trocar em bases iguais. Sendo assim, conclui-se que a relação entre relações sociais e saúde na população idosa pode ser uma relação recíproca.

  15. Relación entre el consumo de drogas y maltrato infantil entre estudiantes universitarios de la universidad en Colombia

    OpenAIRE

    Monica Rosaura Garcia Baquero; Robert Mann; Hayley Hamilton; Pat Erickson; Bruna Brands; Norman Giesbrecht; Maria da Glória Miotto Wright; Francisco Cumsille; Jaime Sapag; Akwatu Khenti

    2015-01-01

    Esta investigación examina la relación entre el uso de drogas en estudiantes de una Universidad Pública en Villavicencio, Colombia, y su relación con el maltrato durante la niñez, utilizando como referente teórico la perspectiva bioecológica. Estudio exploratorio retrospectivo, con una muestra de 313 estudiantes de pregrado. El 10.2% de los encuestados refiere haber sido maltratado en la Infancia y la violencia de mayor uso fue la violencia física seguida de la violencia psicológica. El 56.9%...

  16. Relación entre el consumo de drogas y maltrato infantil entre estudiantes universitarios de la universidad en Colombia

    OpenAIRE

    Baquero,Monica Rosaura Garcia; Mann,Robert; Hamilton,Hayley; Erickson,Pat; Brands,Bruna; Giesbrecht,Norman; Wright,Maria da Glória Miotto; Cumsille,Francisco; Sapag,Jaime; Khenti,Akwatu

    2015-01-01

    Esta investigación examina la relación entre el uso de drogas en estudiantes de una Universidad Pública en Villavicencio, Colombia, y su relación con el maltrato durante la niñez, utilizando como referente teórico la perspectiva bioecológica. Estudio exploratorio retrospectivo, con una muestra de 313 estudiantes de pregrado. El 10.2% de los encuestados refiere haber sido maltratado en la Infancia y la violencia de mayor uso fue la violencia física segui...

  17. Basic molecular spectroscopy

    CERN Document Server

    Gorry, PA

    1985-01-01

    BASIC Molecular Spectroscopy discusses the utilization of the Beginner's All-purpose Symbolic Instruction Code (BASIC) programming language in molecular spectroscopy. The book is comprised of five chapters that provide an introduction to molecular spectroscopy through programs written in BASIC. The coverage of the text includes rotational spectra, vibrational spectra, and Raman and electronic spectra. The book will be of great use to students who are currently taking a course in molecular spectroscopy.

  18. Physical and chemical characterization of pastes of bone cements with ZrO{sub 2}; Caracterizacion fisica y quimica de pastas de cementos oseos con ZrO{sub 2}

    Energy Technology Data Exchange (ETDEWEB)

    Quinto H, A. [Instituto Tecnologico de Zacatepec, A.P. 45, 62900 Zacatepec, Morelos (Mexico); Pina B, M.C. [Instituto de Investigaciones en Materiales, Universidad Nacional Autonoma de Mexico, A.P. 70-360, 04510 Mexico D.F. (Mexico)

    2003-07-01

    Setting times and temperature of sixteen calcium phosphate cements added with ZrO{sub 2} were evaluated. Their behaviors were analysed to be used like injectable formulations in surgery of bone. Two cements of calcium phosphates enriched with ZrO{sub 2} with the best characteristics in setting times and temperature, were mechanically tested after 1 and 7 days of prepared. Density was determined using a pycnometer, chemical composition was determined by X-ray diffraction and the molecular structure was determined by infrared spectroscopy. (Author)

  19. Synthesis and characterization of zirconium molybdates of {sup 99} Mo/{sup 99m} Tc generators; Sintesis y caracterizacion de molibdatos de zirconio de generadores {sup 99} Mo/{sup 99m} Tc

    Energy Technology Data Exchange (ETDEWEB)

    Contreras R, A.; Monroy G, F.; Diaz A, L.V. [Instituto Nacional de Investigaciones Nucleares, A.P. 18-1027, 11801 Mexico D.F. (Mexico)

    2002-07-01

    The zirconium molybdates are gels which are used as cation exchangers in the production of {sup 99} Mo/{sup 99m} Tc generators. The synthesis method and the characterization of these gels by thermogravimetry, infrared spectroscopy and X-ray diffraction is presented with the purpose of finding which the factors are that influence in the efficiency of the {sup 99m} Tc production. The results show that the quantity of molecular water contained in gel, is possibly the cause of variations of the efficiencies of the {sup 99} Mo/{sup 99m} Tc generator. (Author)

  20. Digitotalar dysmorphism: Molecular elucidation

    African Journals Online (AJOL)

    obtained for molecular studies. Since the distal arthrogryposes (DAs) are genetically heterogeneous, an unbiased approach to mutation ... Diseases and Molecular Medicine, Department of Pathology, Faculty of Health Sciences, University of Cape Town, South Africa, with an interest in molecular genetics of connective ...

  1. Artificial molecular motors

    NARCIS (Netherlands)

    Kassem, Salma; van Leeuwen, Thomas; Lubbe, Anouk S.; Wilson, Miriam R.; Feringa, Ben L.; Leigh, David A.

    2017-01-01

    Motor proteins are nature's solution for directing movement at the molecular level. The field of artificial molecular motors takes inspiration from these tiny but powerful machines. Although directional motion on the nanoscale performed by synthetic molecular machines is a relatively new

  2. Gamma radiation of quartz from Entre Rios (SC) and QuaraÍ (RS)

    International Nuclear Information System (INIS)

    Enokihara, Cyro T.; Rela, Paulo R.; Schultz-Güttler, Rainer A.

    2017-01-01

    The availability of gamma ray irradiators in Brazil increased the possibilities of treatments of gemstones for color enhancements. One of the minerals with a very high potential of these treatments is quartz, a very widespread mineral with many colored commercial varieties. A specific variety of quartz showing a green color in nature or induced artificially by radiation gamma ( 60 Co) is quite rare. In Brazil the widely scattered geode occurrences along a 600 km stretch from Quaraí at Brazil southernmost tip to Uberlandia in Minas Gerais is one of these. Quartz from these occurrences have been formed by strong hydrothermal activities. That way much quartz crystals showed a very fast growth history facilitating the formation of growth defects and the uptake of water in form of micro inclusions, molecular water, silanol (Si-OH) and OH. In the present work the material analyzed is from hydrothermal regimes located near the towns Entre Rios (SC) and Quaraí (RS). To characterize these materials analyses have been made by ICP, NAA, electron microscopy, water loss techniques and UV-VIS and NIR-FTIR spectroscopic measurements. Silanol complexes are found, which by radiation due to gamma rays form the color center NBOHC (Non-Bonding Oxygen Hole Center), showing absorption between 590 to 620 nm and leaving a transmission window at about 550nm, responsible for the green color. The spectroscopic water determination showed less molecular water (up to 2300 ppm by weight), probably due to remaining silanol complexes.The water content with up to 3200 ppm by weight exceeds the amount of charge balancing cations (Fe, Al, Li). (author)

  3. Gamma radiation of quartz from Entre Rios (SC) and QuaraÍ (RS)

    Energy Technology Data Exchange (ETDEWEB)

    Enokihara, Cyro T.; Rela, Paulo R., E-mail: cteiti@ipen.br, E-mail: prela06@yahoo.com.br [Instituto de Pesquisas Energéticas e Nucleares (IPEN/CNEN-SP), São Paulo, SP (Brazil); Schultz-Güttler, Rainer A., E-mail: rainersgut@gmail.com [Universidade de Sao Paulo (USP), Sao Paulo, SP (Brazil). Instituto de Geociências

    2017-07-01

    The availability of gamma ray irradiators in Brazil increased the possibilities of treatments of gemstones for color enhancements. One of the minerals with a very high potential of these treatments is quartz, a very widespread mineral with many colored commercial varieties. A specific variety of quartz showing a green color in nature or induced artificially by radiation gamma ({sup 60}Co) is quite rare. In Brazil the widely scattered geode occurrences along a 600 km stretch from Quaraí at Brazil southernmost tip to Uberlandia in Minas Gerais is one of these. Quartz from these occurrences have been formed by strong hydrothermal activities. That way much quartz crystals showed a very fast growth history facilitating the formation of growth defects and the uptake of water in form of micro inclusions, molecular water, silanol (Si-OH) and OH. In the present work the material analyzed is from hydrothermal regimes located near the towns Entre Rios (SC) and Quaraí (RS). To characterize these materials analyses have been made by ICP, NAA, electron microscopy, water loss techniques and UV-VIS and NIR-FTIR spectroscopic measurements. Silanol complexes are found, which by radiation due to gamma rays form the color center NBOHC (Non-Bonding Oxygen Hole Center), showing absorption between 590 to 620 nm and leaving a transmission window at about 550nm, responsible for the green color. The spectroscopic water determination showed less molecular water (up to 2300 ppm by weight), probably due to remaining silanol complexes.The water content with up to 3200 ppm by weight exceeds the amount of charge balancing cations (Fe, Al, Li). (author)

  4. Molecular computing origins and promises

    CERN Document Server

    Rambidi, Nicholas G

    2014-01-01

    Molecular Computing explores whether molecular primitives can prove to be real alternatives to contemporary semiconductor means. The text discusses molecular primitives and circuitry for information processing devices.

  5. Proteinas do liquido cefalorraqueano: I. Estudo comparativo entre metodos de concentração

    Directory of Open Access Journals (Sweden)

    Lucia M. Singer Vermes

    1983-03-01

    Full Text Available No intuito de escolher entre métodos de concentração, aplicáveis ao LCR, aquele que, não provocando desnaturação de proteínas, seja o mais exato, preciso e de fácil aplicação em laboratórios de rotina, foram estudados quatro procedimentos: diálise contra solução de goma-arábica, centrífugo-ultrafiltração, absorção de substâncias de baixo peso molecular por gel seco de poliacrilamida e ultrafiltração sob pressão positiva. Concluiu-se que a diálise contra solução de goma-arábica, por ser preciso, relativamente exato, simples e pouco oneroso, é o mais satisfatório dentre os métodos estudados.

  6. Estudio sobre las relaciones filogenéticas entre diversos aislamientos del hongo Paracoccidioides brasiliensis

    Directory of Open Access Journals (Sweden)

    Juan McEwen

    2003-01-01

    Full Text Available Aunque es poco lo que se conoce acerca de la biología evolutiva
    del hongo P. brasiliensis, varios estudios moleculares han demostrado que existen variaciones en secuencias de ADN entre sus aislamientos, las que se correlacionan con el origen geográfico de las mismas y con diferencias en su virulencia para modelos murinos (1,2. Se desconoce si estas variaciones son el resultado final de un proceso de especiación alopátrica que daría origen a especies aisladas genéticamente provistas de características fenotípicas (patogenicidad, inmunogenicidad y genotípicas diferentes, las que podrían ser usadas como una alternativa para mejorar e innovar los métodos actuales de diagnóstico. Por lo tanto, proponemos como objetivo general estudiar un aspecto fundamental de la biología evolutiva del hongo patógeno humano P. brasiliensis como es la especiación.

  7. Dos años entre los indios

    Directory of Open Access Journals (Sweden)

    Ardila Ardila Olga Felisa

    1996-06-01

    Full Text Available

    La obra constituye la traducción del alemán publicada originalmente en dos volúmenes por E. Wasmuth en Berlín en 1909. En 1967 la Akademische Druck-u Verlagsanstalt en Graz (Austria publicó la segunda edición de la obra original, sobre la cual se trabajó la presente versión en español. La traducción estuvo a cargo de la antropóloga María Mercedes Ortiz. Koch-Grünberg se dedicó al estudio de la filología clásica pero con el tiempo se fue interesando cada vez más por el estudio de los pueblos autóctonos de Suramérica. En 1903 realizó su primera expedición a partir del noroeste brasilero hasta Colombia, en la región comprendida entre el alto río Negro y el Yapurá, área muy poco explorada hasta el momento. La obra Dos años entre los indios resume los resultados básicos de esta expedición. El autor alemán presenta el relato de sus cuatro viajes e ilustra con un mapa la ruta de su expedición a partir del Amazonas. Además del noroeste brasilero, el autor recorre un área importante del territorio colombiano, especialmente la zona del actual departamento del Vaupés. El libro está escrito en forma de un diario de viaje en el que se destacan sus observaciones etnográficas y lingüísticas, especialmente en lo que respecta a la cultura material, el ritual, el arte, las diferentes lenguas nativas habladas en la región y las relaciones de afinidad existentes entre dichas lenguas.

  8. Peter Shepheard Espacios intermedios entre la arquitectura y el paisaje

    Directory of Open Access Journals (Sweden)

    Juan J. Tuset

    2015-05-01

    Full Text Available ResumenAcabada la Segunda Guerra Mundial, el Movimiento Moderno se debatió entre su continuidad o crisis, lo que llevó a numerosos arquitectos y críticos a formular teorías y adoptar actitudes disciplinares trasgresoras con el momento. Una de ellas fue la del arquitecto, urbanista y paisajista inglés Peter Shepheard quien desarrolló una actividad profesional, teórica y docente de la que se trasluce la relevancia del concepto in between como una de las claves defi nitorias del diseño arquitectónico en la segunda mitad del siglo XX. Para Shepheard el diseño moderno debía ser el encuentro entre la arquitectura, el urbanismo y el paisaje. Aseveración que vino precedida por diferentes tipos de obras arquitectónicas, proyectos urbanos, artículos y publicaciones sobre el diseño del paisaje y del jardínque le convirtieron en una voz de referencia en el contexto británico. Shepheard alentó a los paisajistas a convencerse de que las tres disciplinas anteriores convergen en un sola y que la responsabilidad de la joven profesión de arquitecto del paisaje es asumir el reto del diseño arquitectónico, urbano y paisajístico como un todo en la búsqueda y defi nición de espacios intermedios entre la arquitectura y el paisaje. AbstractAfter the Second World War, Modernism started to debate his continuity or crisis. This led many architects and critics to formulate theories and take up breaking disciplinary attitudes against that time. One of them was the English architect, urban planner and landscape designer Peter Shepheard who developed a professional, theoretical and academic career where the concept in between got relevance as one of the defi ning keys of the architectural design in the second half of the twentieth century. To Shepheard modern design should be the encounter between architecture, urbanism and landscape. This claim was preceded by different types of architectural works, urban projects, articles and publications on

  9. La retractación arbitraria, entre principios y remedios

    Directory of Open Access Journals (Sweden)

    Matteo Dellacasa

    2012-06-01

    Full Text Available En la jurisprudencia italiana se ha consolidado el enfoque según la cual el juez está legitimado para controlar el ejercicio del derecho de retractación discrecional. Ante una solicitud expresa de la parte, el juez, incluso, está obligado a verificar la conformidad de la conducta de quien ejerce el derecho con el canon de la buena fe contractual. La reflexión de la doctrina italiana se concentra prevalentemente en la dialéctica entre autonomía privada y control judicial, mientras es menos frecuentado el terreno de los remedios que siguen a la retractación arbitraria. En este segundo perfil se concentra el presente escrito. En primer lugar, se afirma que el control jurisdiccional de la retractación ad nutum es oportuno en relación con todos los contratos, y no solo en aquellos caracterizados por la asimetría de poderes entre las partes. El remedio generalmente aplicable a favor de la parte que sufre la retractación arbitraria se identifica con el resarcimiento del interés negativo: el contratante desilusionado puede obtener el reembolso de los gastos asumidos y el resarcimiento de las oportunidades de ganancias perdidas como consecuencia de la confianza depositada en la realización del negocio. En segundo lugar, se delinean los criterios que permiten identificar la retractación arbitraria. En fin, se analiza si la existencia de una relación de dependencia económica entre la empresa que se retracta arbitrariamente y su contraparte contractual puede justificar la aplicación de un remedio diferente del resarcimiento del interés negativo. El autor está orientado a responder afirmativamente. Si la empresa que sufre la retractación ilegítima ha realizado inversiones específicas –centradas en las exigencias de la contraparte y, por esto, difícilmente recuperables–, el resarcimiento del interés negativo ofrece una tutela parcial e inadecuada. Los remedios aplicables, en cambio, deben salvaguardar el interés positivo de la

  10. Molecular similarity measures.

    Science.gov (United States)

    Maggiora, Gerald M; Shanmugasundaram, Veerabahu

    2011-01-01

    Molecular similarity is a pervasive concept in chemistry. It is essential to many aspects of chemical reasoning and analysis and is perhaps the fundamental assumption underlying medicinal chemistry. Dissimilarity, the complement of similarity, also plays a major role in a growing number of applications of molecular diversity in combinatorial chemistry, high-throughput screening, and related fields. How molecular information is represented, called the representation problem, is important to the type of molecular similarity analysis (MSA) that can be carried out in any given situation. In this work, four types of mathematical structure are used to represent molecular information: sets, graphs, vectors, and functions. Molecular similarity is a pairwise relationship that induces structure into sets of molecules, giving rise to the concept of chemical space. Although all three concepts - molecular similarity, molecular representation, and chemical space - are treated in this chapter, the emphasis is on molecular similarity measures. Similarity measures, also called similarity coefficients or indices, are functions that map pairs of compatible molecular representations that are of the same mathematical form into real numbers usually, but not always, lying on the unit interval. This chapter presents a somewhat pedagogical discussion of many types of molecular similarity measures, their strengths and limitations, and their relationship to one another. An expanded account of the material on chemical spaces presented in the first edition of this book is also provided. It includes a discussion of the topography of activity landscapes and the role that activity cliffs in these landscapes play in structure-activity studies.

  11. Cultura organizacional: sinergias e alergias entre Hofstede e Trompenaars

    Directory of Open Access Journals (Sweden)

    Daniel Pacheco Lacerda

    2011-10-01

    Full Text Available Entre os diferentes elementos a serem considerados na gestão atualmente, os aspectos culturais têm se colocado na centralidade das discussões organizacionais. Essa posição deriva do fato de que a vantagem competitiva sustentável se origina da compreensão, respeito e utilização das diferenças de hábitos, práticas, pontos de vistas e competências. Empresas com atuação local ou global precisam atentar para as características oriundas de seu capital humano. O presente trabalho busca apresentar algumas evidências das implicações culturais a partir do prisma das dimensões culturais. Para isso é realizada uma breve revisão sobre o tema, em seguida são discutidas algumas repercussões para as organizações.

  12. Resiliencia en estudiantes universitarios. Un estudio comparado entre carreras

    OpenAIRE

    Caldera Montes, Juan Francisco; Aceves Lupercio, Brenda Isabel; Reynoso González, Óscar Ulises

    2016-01-01

    Resumen El presente trabajo tuvo como propósito conocer el nivel de resiliencia en una muestra de estudiantes universitarios de una institución de educación superior pública del estado de Jalisco, México. Además de ello, se analizó la relación y diferencia entre la resiliencia y las variables de sexo, edad y nivel socioeconómico. Para medir la variable de interés se utilizó la Escala de Resiliencia desarrollada por Wagnild y Young (1993) en su versión traducida y adaptada al español por Heile...

  13. Resiliencia en estudiantes universitarios. Un estudio comparado entre carreras

    OpenAIRE

    Juan Francisco Caldera Montes; Brenda Isabel Aceves Lupercio; Óscar Ulises Reynoso González

    2016-01-01

    El presente trabajo tuvo como propósito conocer el nivel de resiliencia en una muestra de estudiantes universitarios de una institución de educación superior pública del estado de Jalisco, México. Además de ello, se analizó la relación y diferencia entre la resiliencia y las variables de sexo, edad y nivel socioeconómico. Para medir la variable de interés se utilizó la Escala de Resiliencia desarrollada por Wagnild y Young (1993) en su versión traducida y adaptada al español por Heilemann, Le...

  14. Aprendiendo de mi salud entre contextos y cuentos

    OpenAIRE

    Moreno Cadavid, Erika; Piedrahita Velásquez, Ana María; Hernández Enríquez, Colombia

    2009-01-01

    Se presenta el informe de una investigación cuyo propósito fue sistematizar y analizar un proceso de implementación de dos estrategias de intervención pedagógica, orientadas a promover la resiliencia y la adaptación al contexto hospitalario de un grupo de niños y niñas entre 4 y 12 años de edad, hospitalizados en las Salas de Hemato-Oncología y Nefrología del Hospital Universitario San Vicente de Paúl (HUSVP), de Medellín, durante el año 2006. This article presents the report of an invest...

  15. O humor entre os povos Jê: cotidiano e ritual

    OpenAIRE

    Dias, Lucília da Glória Alves

    2015-01-01

    O objetivo do presente trabalho é refletir sobre o riso e o humor na experiência das sociedades indígenas jê, Brasil Central. Com base na análise da etnografia sobre povos jê produzida entre as décadas de 1970 e 2010, a presença do humor é tratada aqui em dois contextos específicos: as relações interpessoais chamadas pela antropologia clássica de “relações jocosas” e a presença em rituais de figuras cômicas ou “palhaços”. O primeiro conjunto é abordado principalmente da perspectiva da “conviv...

  16. O diálogo entre poesia e outras artes

    Directory of Open Access Journals (Sweden)

    Luiz Henrique Barbosa

    2012-11-01

    Full Text Available O objetivo com este artigo foi identificar os possíveis diálogos entre a poesia e as outras artes. Apoiados na afirmação de Solange Ribeiro de Oliveira de que é possível comparar a ordem literária com outra ordem estética, tentou-se aqui aproximar a poesia de outra estética artística. Para isso, foram selecionados dois poetas do Modernismo brasileiro: João Cabral de Melo Neto e Manoel de Barros. Chegou-se à conclusão de que o fazer poético desses autores apresenta semelhanças com as técnicas utilizadas pela estética surrealista.

  17. Os Usos do Tempo Livre entre Jovens de Classes Populares

    Directory of Open Access Journals (Sweden)

    Manoela Pagotto Martins Nodari

    Full Text Available RESUMO O presente estudo, de caráter quantitativo, pretendeu investigar aspectos relacionados ao tempo livre de jovens de classes populares. Participaram da pesquisa 291 jovens (53,3% meninas, de 15 a 19 anos (M = 16,3; DP = 1,09, estudantes de ensino médio em escolas públicas da Grande Vitória, ES. Os dados foram coletados através de questionário e analisados através do software SPSS. Os resultados apontaram, principalmente, para os diferentes fatores envolvidos nas formas de apropriação do tempo livre entre esses jovens, não relacionados estritamente à renda, mas também a aspectos como gênero, meio em que vivem, estilos de vida e grupos de que participam.

  18. Entre normas e fatos: desafios e dilemas da ordem internacional

    Directory of Open Access Journals (Sweden)

    Cruz Sebastião C. Velasco e

    2003-01-01

    Full Text Available Examinam-se os limites e o significado da controvérsia entre "realistas" que invocam fatos e "cosmopolitas" que invocam normas, com referência às perspectivas da ordem internacional após 11 de setembro de 2001. Contra a idéia da retomada pelos EUA do multilateralismo, ou do seu oposto, a idéia dos EUA como sede de um verdadeiro império mundial, propõe-se um "cenário de transição", marcado por turbulências inter- e intra-estatais, sem prejuízo da possibilidade real de uma configuração mais equilibrada no futuro.

  19. La Cooperación Internacional entre Servicios

    Directory of Open Access Journals (Sweden)

    Pulido Gragera, Julia

    2005-01-01

    Full Text Available Los nuevos requerimientos en materia de seguridad que la comunidad internacional tiene que asumir como consecuencia de las nuevas amenazas y riesgos, obligan a que los Servicios de Inteligencia y de Información, objeto de análisis de este artículo, incrementen y mejoren la colaboración y cooperación entre ellos. En este sentido la aspiración de los Estados por poseer el máximo nivel de seguridad cediendo el mínimo de soberanía, se constituye como uno de los objetivos principales de los mismos, dificultad que se presenta, en la actualidad, para poder lograr una efectiva coordinación multilateral.…

  20. Entre el poder y el saber: Recuento del pensamiento latinoamericano

    Directory of Open Access Journals (Sweden)

    Luis Ramiro Beltrán Salmón

    2008-12-01

    Full Text Available Refiere el texto un resumen y análisis del libro "Entre el Saber y el Poder: Pensamiento comunicacional Latinoamericano". Libro de notable ejercicio de reflexión, de visión holística y totalizadora que recupera y sistematiza lo que se ha pensado sobre la comunicación y sus correspondientes dilemas en la América hispano-lusitana. La primera parte "la comunicación en las tramas del poder": con dos secciones, la una dedicada a la coyuntura de la Guerra Fría y la segunda dedicada a la coyuntura de la Globalización. La segunda "La comunicación en el umbral del saber" con dos secciones: la primera recoge materiales de la Educación para la comunicación y la otra la investigación de la comunicación.

  1. Armaduras de cosido entre hormigones prefabricados y ejecutados in situ

    Directory of Open Access Journals (Sweden)

    Solas, Andrés

    1988-04-01

    Full Text Available This article deals with the study of seam reinforcements between two concretes of different types which make up a compound element prefabricated and made in situ. The advantage of this type of construction is that the individual units can be made, transported and erected more easily, although some problems may arise. These facts receive special reference throughout the article.

    Este artículo trata sobre el estudio de las armaduras de cosido entre dos hormigones, de distinta naturaleza, que componen un elemento compuesto prefabricado y ejecutado in situ. La ventaja de este tipo de construcciones es que unidades individuales pueden ser hechas, transportadas y erigidas con mayor facilidad, pudiéndose derivar también algún problema. De todo ello se hace especial referencia a lo largo del artículo.

  2. Comportamento alimentar e imagem corporal entre estudantes de medicina

    Directory of Open Access Journals (Sweden)

    Maria Lúcia Magalhães Bosi

    Full Text Available Transtornos do comportamento alimentar (TCA tendem a ocorrer entre mulheres jovens, colocando universitárias como grupo de risco. Este estudo visa identificar comportamentos alimentares e imagem corporal como fatores de risco para TCA em estudantes de Medicina. É um estudo transversal com amostra aleatória representativa,que utilizou o índice de massa corporal (IMC autorreferido; o BodyShapeQuestionnaire (BSQ ; o BulimicInvestigatory Test Edinburgh (Bite ;e o EatingAttitudes Test (EAT-26 . A estatística foi descritiva,com teste do qui-quadrado e Anova,e nível de significância p<0,05. Asmédias(DP de idade e IMC foram20,8 (2,2 anos e 21,5 (2,6 kg/m². As prevalências foram: 27,7% apresentaram distorção da imagem corporal pelo BSQ; 31,7% expressaram comportamento alimentar anormal e 6,3% com risco para bulimia pelo Bite, sendo que 7,9% apresentaram sintomas com gravidade moderada/intensa; 19% tiveram risco de desenvolver distúrbios alimentares pelo EAT-26. Houve associação significativa entre IMC, imagem corporal e risco para TCA. Alunas de Medicina apresentaram risco subclínico ou estágio inicial de TCA e precisam de atenção para que estes distúrbios não prejudiquem sua saúde e prática profissionais.

  3. Uma atualidade in extremis: Foucault entre Marx e o neoliberalismo

    Directory of Open Access Journals (Sweden)

    Nilton Ken Ota

    2017-12-01

    Full Text Available A participação de Foucault no GIP marcou o momento de constituição de sua teoria estratégica das lutas no contexto de uma interlocução com militantes marxistas. O enfraquecimento dessa interlocução foi acompanhado pelo início das pesquisas genealógicas e por uma reformulação conceitual que dispersou o problema da racionalidade estratégica em benefício da construção de uma discursividade propriamente teórica. As controvérsias atuais ao redor dos sentidos do legado foucaultiano, cujo movimento pendular tem variado entre Marx e o neoliberalismo, revelam os efeitos de uma trajetória intelectual que se dividiu entre a reflexão crítica do combate concreto e a elaboração conceitual de um experimentalismo radical. Este artigo pretende reconstruir os principais pontos e conformações teóricas dessa trajetória. The participation of Foucault in GIP marked the moment of creation of strategic theory about the struggles in the context of a dialogue with Marxist militants. The weakening of that dialogue was accompanied by the start of genealogical research and, consequently, a conceptual reformulation which, among other changes, dispersed the problem of strategic rationality for the construction of a properly theoretical discursiveness. The current controversy surrounding the way the Foucault's legacy, whose pendulum has varied between Marx and neo-liberalism, reveal the effects of an intellectual journey that was divided between the critical reflection of the actual combat and the conceptual formulation of a radical experimentalism. The article An Actuality in extremis: Foucault Between Marx and Neoliberalism aims to reconstruct the main points and theoretical conformations that trajectory.Keywords: Marxism, strategy, neoliberalism, engagement, intellectuals

  4. Encuentros entre la India y Occidente en el mundo antiguo

    Directory of Open Access Journals (Sweden)

    María Teresa Román López

    1999-01-01

    Full Text Available Hay diversos testimonios sobre relaciones comerciales y culturales que, mucho antes de la caída de Babilonia y hasta el siglo vi de nuestra Era, tenían lugar entre el Próximo Oriente y Occidente, por un lado, y la India por otro. La expedición de Alejandro Magno en la India dio lugar no sólo a contactos militares, sino a debates filosófico-religiosos. Se halla una descripción casi completa de la flora en los autores griegos, y no es posible ignorar el arte grecobúdico que floreció después de la muerte de Alejandro en los reinos helénicos de la frontera. Está demostrado que misioneros budistas fueron enviados por el emperador Ashoka a Siria, Egipto, IVIacedonia, etc. En la época del Imperio romano las relaciones entre la India y el mundo occidental fueron muy frecuentes.There are several testimonies about comercial and cultural relationships that, after the falling of Babilonia and unta the VI century of our edge, were made between next Orient and Occident in one side, and India on the other side. The expedition of Alexander the Great to India made, note only military relations but philosophie and religious debates. It has been found a mostly complete description of the Flora on the greek authors, and it's not posible to ignore the grecobudie art that bloomed after Alexander death at the Helenio Kingdoms on the border. It's preved that budist missioners were send by the Ashoka emperor to Siria, Egipt, Macedonie, etc. On the Román Empire edge the relationships between India and the Occident worid were so frecuent.

  5. Micrometeorological studies for the characterization of the atmospheric superficial layer in the Valley of Mexico; Estudios micrometeorologicos para la caracterizacion de la capa atmosferica superficial en el Valle de Mexico

    Energy Technology Data Exchange (ETDEWEB)

    Saldana Flores, Ricardo; Salcido Gonzalez, Victor A.; Borja Diaz, Marco Antonio R.; Morales Reyes, Maria Flor [Instituto de Investigaciones Electricas, Cuernavaca (Mexico)

    1995-12-31

    segunda campana se realizaron las mismas mediciones de la primera, a excepcion de los radiosondeos con el globo cautivo, incorporando un sensor ultrasonico de turbulencia con el cual se obtuvieron, entre otros parametros: - Velocidades medias de las componentes ortogonales del viento. - Temperatura media. - Covarianza de la componente del viento z y temperatura. - Velocidad de friccion. - Longitud de Monin-Obukov. -Flujo de calor vertical. - Velocidad media del viento. - Direccion media del viento.

  6. Micrometeorological studies for the characterization of the atmospheric superficial layer in the Valley of Mexico; Estudios micrometeorologicos para la caracterizacion de la capa atmosferica superficial en el Valle de Mexico

    Energy Technology Data Exchange (ETDEWEB)

    Saldana Flores, Ricardo; Salcido Gonzalez, Victor A; Borja Diaz, Marco Antonio R.; Morales Reyes, Maria Flor [Instituto de Investigaciones Electricas, Cuernavaca (Mexico)

    1996-12-31

    segunda campana se realizaron las mismas mediciones de la primera, a excepcion de los radiosondeos con el globo cautivo, incorporando un sensor ultrasonico de turbulencia con el cual se obtuvieron, entre otros parametros: - Velocidades medias de las componentes ortogonales del viento. - Temperatura media. - Covarianza de la componente del viento z y temperatura. - Velocidad de friccion. - Longitud de Monin-Obukov. -Flujo de calor vertical. - Velocidad media del viento. - Direccion media del viento.

  7. Molecular photoionization dynamics

    International Nuclear Information System (INIS)

    Dehmer, J.L.

    1982-01-01

    This program seeks to develop both physical insight and quantitative characterization of molecular photoionization processes. Progress is briefly described, and some publications resulting from the research are listed

  8. Polymer friction Molecular Dynamics

    DEFF Research Database (Denmark)

    Sivebæk, Ion Marius; Samoilov, Vladimir N.; Persson, Bo N. J.

    We present molecular dynamics friction calculations for confined hydrocarbon solids with molecular lengths from 20 to 1400 carbon atoms. Two cases are considered: a) polymer sliding against a hard substrate, and b) polymer sliding on polymer. In the first setup the shear stresses are relatively...... independent of molecular length. For polymer sliding on polymer the friction is significantly larger, and dependent on the molecular chain length. In both cases, the shear stresses are proportional to the squeezing pressure and finite at zero load, indicating an adhesional contribution to the friction force....

  9. Bullying: comportamento agressivo entre estudantes Bullying: aggressive behavior among students

    Directory of Open Access Journals (Sweden)

    Aramis A Lopes Neto

    2005-11-01

    Full Text Available OBJETIVO: Alertar os pediatras sobre a alta prevalência da prática de bullying entre estudantes, conscientizando-os da importância de sua atuação na prevenção, diagnóstico e tratamento dos possíveis danos à saúde e ao desenvolvimento de crianças e adolescentes, além da necessidade em orientar as famílias e a sociedade para o enfrentamento da forma mais freqüente de violência juvenil. FONTE DE DADOS: Foram acessados bancos de dados bibliográficos e páginas de relevância na Internet, identificando-se artigos e textos recentes sobre o tema. SÍNTESE DOS DADOS: O comportamento agressivo entre estudantes é um problema universal, tradicionalmente admitido como natural e freqüentemente ignorado ou não valorizado pelos adultos. Estudos realizados nas 2 últimas décadas demonstraram que a sua prática pode ter conseqüências negativas imediatas e tardias para todas as crianças e adolescentes direta ou indiretamente envolvidos. A adoção de programas preventivos continuados em escolas de educação infantil e de ensino fundamental tem demonstrado ser uma das medidas mais efetivas na prevenção do consumo de álcool e drogas e na redução da violência social. CONCLUSÃO: A prevenção do bullying entre estudantes constitui-se em uma necessária medida de saúde pública, capaz de possibilitar o pleno desenvolvimento de crianças e adolescentes, habilitando-os a uma convivência social sadia e segura.OBJECTIVE: To warn pediatricians about the high prevalence of bullying among students, to raise their awareness about the importance of their action in the prevention, diagnosis, and treatment of possible damage to children's health and development, and about the necessity to instruct families and society on how to face the most frequent form of youth violence. SOURCE OF DATA: Bibliographic databases and relevant Internet sites were searched for recent articles and texts about the theme. SUMMARY OF THE FINDINGS: Aggressive behavior

  10. Interesse e conhecimento em cirurgia refrativa entre estudantes de medicina

    Directory of Open Access Journals (Sweden)

    Kara José Flávio Cotait

    2002-01-01

    Full Text Available Objetivo: Realizou-se um estudo em estudantes da Faculdade de Medicina do ABC a fim de analisar e relacionar a freqüência de usuários de correção óptica, o tipo de vícios de refração, o número de pessoas submetidas à cirurgia refrativa e o conhecimento e interesse por essa operação. Métodos: realizou-se um levantamento entre estudantes de medicina da Faculdade de Medicina do ABC, no período de 19 a 21 de junho de 2000. Foi utilizado um questionário auto-aplicável como instrumento de coleta de dados. Resultados: foi relatado que 62,7% dos estudantes usavam correção óptica, sendo que 53,3% desses apresentavam, como erro de refração, miopia simples ou associada ao astigmatismo. 92,8% do total dos entrevistados já tinham ouvido falar em cirurgia refrativa, contendo apenas 34,2% conhecedores dessa técnica cirúrgica e 17,6% conhecedores dos riscos e complicações pós-operatórios. Entre os 200 estudantes amétropes, 50,5% gostariam de ser submetidos à operação, sendo que 69,0% deles esperavam, através da cirurgia, a cura definitiva. Foi coletado, também, que 51,7% dos entrevistados tiveram a última consulta oftalmológica há menos de 1 ano; 32,0% entre 1 e 3 anos e 15,7% há mais de três anos. Apenas 5 estudantes já tinham sido submetidos à cirurgia refrativa. Conclusão: A maioria dos estudantes de Medicina (62,7% é portador de vício de refração corrigido, sendo os mais freqüentes a miopia simples e a miopia associada a astigmatismo. Há pouco conhecimento e falsa expectativa em relação à cirurgia, sendo que apenas 34,2% entrevistados conhecem o procedimento cirúrgico, 17,6% sabem dos riscos e das complicações e 69,0% esperam cura total. Diante das condições desse estudo, foi constatado que apesar de muitos se interessarem pela cirurgia refrativa, poucos se submeteram a ela, devido, principalmente, em ordem decrescente, a: contra-indicação médica, falta de oportunidade, falta de conhecimento e

  11. Marketing de relacionamento entre fabricantes e vendedores do varejo

    Directory of Open Access Journals (Sweden)

    Edson Crescitelli

    2007-12-01

    A influência dos vendedores de varejo no processo de decisão de compra do consumidor afeta diretamente as vendas. Por essa razão, manter bom relacionamento com esse público é essencial para os fabricantes de produtos, especialmente no varejo multimarca. O objetivo neste artigo é analisar como as ações de relacionamento são aplicadas pelos fabricantes e percebidas pelos vendedores varejistas da perspectiva do marketing de relacionamento. Para isso, foi feita pesquisa bibliográfica, além de pesquisa de campo envolvendo entrevistas em profundidade com fabricantes e vendedores de redes varejistas do setor de eletrodomésticos. Muito embora sejam rotuladas de ações de relacionamento, a maior parte das ações praticadas pelos fabricantes junto aos vendedores do varejo consiste em campanhas promocionais de vendas. Essas ações apresentam efeito efêmero e são aplicadas para resolução de problemas pontuais de vendas pontuais, o que não contribui para a formação de relacionamento mais consistente entre fabricantes e vendedores. Os resultados a que se chegou neste estudo indicaram que o relacionamento entre fabricantes e vendedores não é ruim, mas está distante do conceito de marketing de relacionamento. Na conclusão são apresentadas possibilidades para se estabelecer um programa de relacionamento junto aos vendedores varejistas. Palavras-chave: Marketing de relacionamento, varejo e venda pessoal Abstract Sales are directly affected by the influence of retailing sellers in the process of consumer purchase decision. For this reason, a good relationship with them is essential to manufacturers mainly in the retailing. The objective of this work is to analyze how relationship activities are developed by manufacturers and how they are perceived by sellers from the perspective of relationship marketing. Therefore, a bibliographic research was made complemented by a field research where in depth interviews were taken with electronic appliances

  12. Resiliencia en estudiantes universitarios. Un estudio comparado entre carreras

    Directory of Open Access Journals (Sweden)

    Juan Francisco Caldera Montes

    2016-07-01

    Full Text Available El presente trabajo tuvo como propósito conocer el nivel de resiliencia en una muestra de estudiantes universitarios de una institución de educación superior pública del estado de Jalisco, México. Además de ello, se analizó la relación y diferencia entre la resiliencia y las variables de sexo, edad y nivel socioeconómico. Para medir la variable de interés se utilizó la Escala de Resiliencia desarrollada por Wagnild y Young (1993 en su versión traducida y adaptada al español por Heilemann, Lee y Kury (2003, la cual está constituida por 25 reactivos en escalamiento tipo Likert. Los resultados muestran niveles altos de resiliencia en los estudiantes universitarios, no encontrándose diferencias significativas entre las variables carrera, sexo y edad de los estudiantes. Se concluye que la resiliencia alta es una característica muy generalizada en la mayoría de los estudiantes universitarios. Finalmente, se sugiere la ampliación de la línea de investigación con otros tamaños muestrales y otro tipo de carreras, así como la ejecución de trabajos que relacionen a la resiliencia con otras variables psicosociales no contempladas en el estudio. Abstract This paper aimed to know the level of resilience from a sample of university students in a public institution of education in the state of Jalisco, México. In addition to that, the relationship and difference between resilience and the variables of gender, age and socioeconomic status were analyzed. For this research, it was used the Resilience Scale developed by Wagnild and Young (1993 in the version translated and adapted to Spanish by Heilemann, Kury and Lee (2003, which consists of 25 reagents in the Likert scaling. This was used to measure the variable of interest. The results show high levels of resilience in university students and there were no significant differences between the career, sex and age variables. It was concluded that high resilience is a very generalized

  13. Figuratividade: o complexo elo entre as palavras e as coisas

    Directory of Open Access Journals (Sweden)

    Ada Lima Ferreira de Sousa

    2016-01-01

    Full Text Available Este artigo trata do conceito de figuratividade no âmbito dos estudos cognitivos da linguagem. Apresenta a polarização, herdada dos gregos antigos, entre o que se convencionou como figurativo e literal, o que resultou no entendimento de que pensamento e linguagem são inerentemente literais. Nessa concepção, o figurativo seria um recurso não natural, propositadamente utilizado como estratégia estilística. Assim, o uso da figuratividade passou a ser associado a prejuízos à suposta transparência da linguagem e dos significados a ela inerentes. Embora essa concepção não tenha sido suplantada, as perspectivas cognitivas contemporâneas que tratam do fenômeno linguístico como sendo intrínseco à cognição oferecem-nos uma outra visão acerca da figuratividade. A Teoria Neural da Linguagem, em particular, tem reforçado, teórica e empiricamente, a compreensão acerca dos mecanismos cognitivos envolvidos na construção de sentidos. De igual relevância, esse arcabouço teórico tem apresentado evidências de que as experiências corpóreas estão na raiz da construção de parte das estruturas mentais evidenciadas no uso da linguagem, de modo que a natureza peculiar de nosso corpo contribui para as peculiaridades de nosso sistema conceptual. A integração entre corpo e mente, de modo que emoções e abstrações devem ser conceptualizadas a partir de elementos mais concretos, de base corpórea, oferece novos contornos à explicação para o fenômeno linguístico da figuratividade. Palavras-chave: Figuratividade. Cognição. Teoria Neural da Linguagem.

  14. Bases del intercambio entre las sociedades norperuanas y surecuatorianas: una zona de transición entre 1500 A.C. y 600 D.C

    Directory of Open Access Journals (Sweden)

    1993-01-01

    Full Text Available BASES DE L'ECHANGE ENTRE LES SOCIETES NORD-PERUVIENNES ET SUD-EQUATORIENNES : UNE ZONE DE TRANSITION ENTRE 1500 AV. J.C. ET 600 AP. J.C. Cet article est le fruit d’une tentative de coopération entre des chercheurs qui travaillent en Équateur et au Pérou, pour relier les deux aires culturelles nettement différenciées, nord-andine et centre-andine, à partir de la définition et de l’étude d’une zone de transition, localisée entre le Río Jubones dans le sud de l'Équateur et le Río Olmos dans le nord du Pérou, entre environ 1500 av. J.C. et 600 ap. J.C. El artículo es resultado de un intento de cooperación entre investigadores que trabajan el Ecuador y el Perú para vincular las dos áreas culturales marcadamente diferenciadas, norandina y centroandina, a partir de la definición y estudio de una zona de transición, localizada entre el río Jubones, al sur de Ecuador y el Río Olmos, al norte de Perú, entre aproximadamente 1500 AC y 600 DC. BASIS OF THE EXCHANGE BETWEEN NORTH PERUVIAN AND SOUTH ECUATORIAN SOCIETIES: A TRANSITIONAL ZONE BETWEEN 1500 B.C. AND 600 A.C. This paper is a collaborative effort by researchers working in Ecuador and Peru, to explore the relationship between two clearly differentiated cultural areas (North and Central Andes on the basis of a definition and study of the prehistory transitional zone located between Río Jubones in Southern Ecuador and Río Olmos in Northern Peru between 1500 B.C. and 600 A.C.

  15. Genética molecular de caracteres cuantitativos en cruzamientos dialélicos de tomate

    Directory of Open Access Journals (Sweden)

    Guillermo Raúl Pratta

    2011-05-01

    Full Text Available El objetivo de este trabajo fue evaluar marcadores moleculares y caracteres cuantitativos en un cruzamiento dialélico completo sin recíprocos, entre cinco líneas recombinantes de tomate y sus híbridos. Se obtuvieron perfiles de AFLP ("amplified fragment length polymorphism" y de polipéptidos del pericarpio en cuatro estados de madurez del fruto de 15 genotipos. Se evaluaron, entre otros: peso, acidez titulable, pH, vida poscosecha y firmeza. Se calculó el porcentaje de polimorfismo para los marcadores moleculares y el porcentaje de variabilidad genética para los caracteres cuantitativos en el grupo de líneas recombinantes, el de híbridos y el conjunto de genotipos. Se realizaron análisis de agrupamiento con cada nivel de variación genética. Para AFLP, el porcentaje de polimorfismo varió entre 34 y 54% y, para los perfiles polipeptídicos, entre 40 y 78%. Mayor polimorfismo fue observado en el grupo de híbridos. La variabilidad genética fue de 100% para acidez y 34% para firmeza, con los mayores valores en los parentales. La similitud genética varió entre los genotipos según el nivel de variación genética; pero la consistencia en el agrupamiento de algunas líneas recombinantes y sus híbridos fue conservada, lo que evidenció asociaciones entre los datos moleculares y fenotípicos.

  16. EL INTÉRPRETE FELIPILLO ENTRE INCAS Y CONQUISTADORES

    Directory of Open Access Journals (Sweden)

    Jochen Plötz

    2016-01-01

    Full Text Available El artículo busca contribuir a la investigación de los papeles atribuidos al mediador lingüístico y, por extensión, transcultural, como son los de traidor, el que no dice todo lo que sabe persiguiendo intereses propios, y otros más. Se establecen unas pautas que caracterizan las situaciones comunicativas conflictivas a lo largo de la historia. Asimismo, se propone una línea de investigación traductológica, interesada en la realización de la mediación lingüística misma y sus circunstancias, como aporte a la historia de la traducción. El caso al que se aplica este programa en el presente artículo es el enfrentamiento entre los incas y los conquistadores europeos en el Perú, en el cual actuaron unos intérpretes indígenas sobre los que se ha producido y se sigue produciendo toda una gama de proyecciones y atribuciones.

  17. Incrementando Las Relaciones Comerciales Entre Colombia Y China

    Directory of Open Access Journals (Sweden)

    Jaime Rafael Ahcar Olmos

    2008-10-01

    Full Text Available Después de las reformas de finales de los años setenta, China consiguió su despegue económico a tal punto que, en la actualidad, se consolida como uno de los mercados más importantes del mundo, recibiendo la atención de investigadores y hombres de negocios a lo largo del planeta. En Colombia existen pocos estudios que hayan explorado las relaciones comerciales con China; en tal sentido, el presente artículo ofrece una amplia revisión de fuentes estadísticas y referencias bibliográficas, dando luces sobre las características y los factores que afectan las relaciones comerciales bilaterales. Los resultados muestran que, si bien China es un valioso proveedor de mercancías para Colombia, las exportaciones hacia ese país aún se encuentran por debajo de su potencial, y se genera un déficit comercial enorme. También muestra que las exportaciones colombianas hacia China se hallan concentradas en unos pocos productos y que dado el tamaño y potencialidad de esta economía, se deberían comenzar negociaciones comerciales que busquen la firma de un acuerdo de libre comercio que permita incrementar el comercio entre ambos países.

  18. Caminhos entre a literatura e a história

    Directory of Open Access Journals (Sweden)

    Bosi Alfredo

    2005-01-01

    Full Text Available O ARTIGO resume o itinerário do autor como historiador da Literatura Brasileira, teórico de poesia e estudioso de nossa formação cultural. Os momentos iniciais desse percurso recebem particular atenção: o estudo da Estética de Croce, o conhecimento da filosofia marxista de Gramsci, a influência do existencialismo cristão no final dos anos de 1950 e o engajamento na política de esquerda no Brasil dos anos de 1960 e 1970. Como docente de Literatura Italiana, o autor escreveu teses sobre Pirandello e Leopardi, ambas inéditas. Trabalhando no campo da história literária, na esteira da obra de Otto Maria Carpeaux, examinou as relações dialéticas entre ideologia e poesia e ideologia e narrativa, o que lhe abriu caminho para o seu conceito de literatura como resistência. Ao elaborar a Dialética da Colonização, dedicou-se ao estudo das tensões que marcam a história das ideologias no Brasil.

  19. Las parroquias rurales de Buenos Aires entre 1730 y 1820

    Directory of Open Access Journals (Sweden)

    Mar\\u00EDa Elena Barral

    2004-01-01

    Full Text Available Este artículo estudia el proceso de construcción de las parroquias rurales de Buenos Aires a lo largo de casi un siglo. Analiza esta gradual extensión de la red parroquial desde 1730 –la creación de los primeros curatos– hasta la década de 1820 cuando la Iglesia experimentaría cambios decisivos en su configuración como consecuencia de las reformas rivadavianas. El trabajo apunta a dar cuenta de los ritmos diferenciales con que se organizó la red parroquial en distintas zonas de la campaña bonaerense y a identificar los momentos más relevantes de los cambios en la misma. Asimismo examina el clero rural: su peso cuantitativo según áreas y períodos, su composición interna y algunos rasgos de las gestiones parroquiales. En especial considera aquellas acciones que los eclesiásticos exhibían entre sus mayores méritos y servicios, como modo de reconocer lo que –en la época– se esperaba de su actividad pastoral en la cura de almas

  20. Consecuencias del aprendizaje organizativo en las relaciones comerciales entre empresas

    Directory of Open Access Journals (Sweden)

    José A. López Sánchez

    2011-06-01

    Full Text Available El objetivo principal de este estudio es analizar la influencia del aprendizaje organizativo (AO sobre la satisfacción y la lealtad en las relaciones comerciales entre empresas. Para ello se plantea un marco teórico donde se adopta como unidad de análisis la relación diádica que mantienen las empresas fabricantes con su principal distribuidor. En el análisis de los datos se emplean sistemas de ecuaciones estructurales con una muestra de empresas españolas. Los resultados empíricos obtenidos aportan evidencias acerca de que el AO del fabricante es un antecedente de los resultados alcanzados en los intercambios relacionales. Así, el mayor grado de AO de la empresa fabricante incide de modo directo en el grado de satisfacción del distribuidor principal y también actúa de modo indirecto sobre su grado de lealtad. Se corrobora además que dicho AO potencia de un modo directo los resultados empresariales del fabricante. Las limitaciones del estudio son las típicas asociadas al uso de la investigación basada en encuesta. Por último, la varianza del método común no fue un problema en este estudio.

  1. Impulso a la igualdad de oportunidades entre hombres y mujeres

    Directory of Open Access Journals (Sweden)

    Eliza Muñoz Catalán

    2016-06-01

    Full Text Available El necesario impulso que se le debe dar a la anhelada igualdad de género entre hombres y mujeres en nuestra sociedad actual, resulta objeto de análisis en la presente obra, a través de la cual, la profesora Iglesias Crespo nos adentra en la contextualización de las políticas de igualdad desde su fundamentación normativa a nivel internacional, comunitario, estatal y autonómico hasta una legislación como la presente que se encuentra marcada por la profunda crisis social, económica e incluso de valores que estamos sufriendo desde hace ya varios años; así como la misma analiza cuál es el alcance jurídico de las diferentes estrategias de promoción para la igualdad efectiva de mujeres y hombres, ya sea a través de medidas de acción positiva, estrategias como la “mainstreaming”, o planes de igualdad de oportunidades.

  2. espacial de los flujos entre 1988 y 2006

    Directory of Open Access Journals (Sweden)

    Daniela Vono

    2007-01-01

    Full Text Available El objetivo de este artículo es el de describir y analizar las características demográficas y territoriales del retorno durante el período entre 1988 y 2006 de aquellos inmigrantes nacidos en España que se han dirigido a algún país de América Latina y de sus descendientes, así como las características de los españoles residentes en países latinoamericanos a partir de los últimos censos de población. Se trabaja con los datos disponibles de las Estadísticas de Variaciones Residenciales (EVR, elaboradas por el INE, para analizar las características de los movimientos de retorno en todo el territorio español y a nivel municipal, por un lado, y, para el estudio de los españoles residentes en América Latina se ha explorado los datos censales disponibles a través del proyecto Investigación de la Migración Internacional en América Latina y el Caribe (IMILA del Centro Latinoamericano y Caribeño de Demografía (CELADE.

  3. Relaciones entre estilos de amor y violencia en adolescentes

    Directory of Open Access Journals (Sweden)

    Iris Xóchitl Galicia Moyeda

    2013-01-01

    Full Text Available De acuerdo a diversas evidencias, la manera en que los y las ado- lescentes establecen sus relaciones amorosas podría estar asociada con la violencia producida y recibida en el noviazgo. Para esclarecer cómo se manifiesta esta relación en una muestra de 105 mujeres y 93 hombres, con una edad entre los 13 y los 15 años, en el Estado de México, se aplicaron dos herramientas: la Escala de Actitudes Amo- rosas (EAA (Hendrick & Hendrick, 1986 y el Cuestionario sobre Violencia en el Noviazgo (CVN. La evidencia indica que los estilos amorosos predominantes fueron el Storge y el Eros. Los hombres cuyo estilo es Ludus tienen más posibilidades de recibir violencia,en tanto que las mujeres cuyo estilo predominante es el Ágape reciben y ejercen más violencia en sus relaciones amorosas. Dado que este estilo es poco frecuente, se sugiere que en las instituciones educativas se promuevan relaciones de noviazgo más igualitarias.

  4. CULTURAS ACADÉMICAS: ENTRE REINVENCIÓN Y CONTRABANDO

    Directory of Open Access Journals (Sweden)

    Kathya Araujo

    2015-01-01

    Full Text Available Sobre la base del análisis de una historia personal de desplazamiento entre academias (peruana y chilena, y la reinvención y el contrabando que toda migración supone, este artículo argumenta de qué manera frente a las nuevas modalidades de evaluación (los rankings, la búsqueda de isomorfismo de las estructuras argumentativas y las formas lingüísticas o incluso la ficción de sociologías globales, se mantienen vivas culturas académicas particulares. En este marco, la reflexión se organiza mostrando que detrás de la singularidad de los estilos intelectuales, formas de sociabilidad profesionales e incluso formas lingüísticas de cada una de ellas, lo que se revela es la manera en la que cada cultura académica local responde desde tradiciones diversas a desafíos político sociales distintos y con ello su rol de compromiso público y crítico.

  5. Diferencias cualitativas entre experiencias tutoriales para opciones de aprendizaje universitario

    Directory of Open Access Journals (Sweden)

    Ángel J. LÁZARO MARTÍNEZ

    2008-01-01

    Full Text Available Se analiza la tutoría como elemento básico de la excelencia educativa, resaltando su carácter nuclear en todo proceso formativo institucionalizado. Se constata la relación entre los procesos educativos, la orientación y la tutoría, desde el nuevo enfoque de la auténtica orientación. En el contexto universitario se debaten sus competencias, destacando que, desde sus orígenes, la tutoría ha constituido el sentido de la función y el quehacer de la finalidad y optimización de la formación universitaria, tanto en la búsqueda del saber como en la pretensión de aplicación social. Esta situación aboca en el análisis de las opciones de la acción tutorial en la Universidad, sus modalidades y sus posibilidades de intervención, y se plantean, de forma más concreta, recogiendo las experiencias destacables en el ámbito universitario, las estrategias organizativas y de desarrollo en aulas y situaciones individualizadas.

  6. O consumo de drogas entre os estudantes adolescentes

    Directory of Open Access Journals (Sweden)

    Denis da Silva Moreira

    1996-12-01

    Full Text Available Este trabalho de pesquisa aborda os aspectos relacionados ao consumo de drogas entre os estudantes de 7º e 8º séries, na faixa etária de 12 a 15 anos, das escolas públicas e particulares da cidade de Alfenas, no ano de 1993. As drogas mais oferecidas e mais usadas foram os solventes voláteis ou inalantes, seguidos da maconha. O local onde a oferta é mais freqüente são os lugares públicos ( ginásios de show, bares, casa de jogos, parques e outros. Constatou-se que 5,5% dos entrevistados já fizeram uso de drogas, sendo motivados pela curiosidade e influência dos amigos. Praticamente todos os estudantes já receberam, através da família e/ou escola, orientação sobre drogas. A escola é a instituição que possui a maior clientela de risco às drogas, ou seja, crianças, adolescentes e jovens e por ser uma das responsáveis na educação e em passar Cultura é a que possui maioras condições de executar um programa de prevenção às drogas.

  7. Sentidos del trabajo y organización de la vida doméstica   entre policías de la Provincia de Buenos Aires  

    Directory of Open Access Journals (Sweden)

    Sabrina Calandrón

    2015-07-01

    Full Text Available Este artículo analiza las caracterizaciones de la actividad policial como trabajo, describiendo las percepciones de los miembros de una fuerza de seguridad puntual: la Policía de la Provincia de Buenos Aires. A lo largo del texto se analiza el sitio de la actividad policial en la trayectoria laboral de los y las policías. Esto permite identificar las características relevantes del empleo como la estabilidad económica, la seguridad social que otorga y las proyecciones a futuro. No obstante, también se estudia la convivencia de dinámicas apoyadas en el sistema burocrático policial con otras que personalizan los lazos laborales. Finalmente, las concepciones de la familia y la lógica de responsabilidades morales hacia ella obtienen un lugar central en el desarrollo y sentido del trabajo en la policía.

  8. Making molecular machines work

    NARCIS (Netherlands)

    Browne, Wesley R.; Feringa, Ben L.

    2006-01-01

    In this review we chart recent advances in what is at once an old and very new field of endeavour the achievement of control of motion at the molecular level including solid-state and surface-mounted rotors, and its natural progression to the development of synthetic molecular machines. Besides a

  9. Veterinary Molecular Diagnostics

    NARCIS (Netherlands)

    Roest, H.I.J.; Engelsma, M.Y.; Weesendorp, E.; Bossers, A.; Elbers, A.R.W.

    2017-01-01

    In veterinary molecular diagnostics, samples originating from animals are tested. Developments in the farm animals sector and in our societal attitude towards pet animals have resulted in an increased demand for fast and reliable diagnostic techniques. Molecular diagnostics perfectly matches this

  10. Molecular Beacons in Diagnostics

    OpenAIRE

    Tyagi, Sanjay; Kramer, Fred Russell

    2012-01-01

    Recent technical advances have begun to realize the potential of molecular beacons to test for diverse infections in clinical diagnostic laboratories. These include the ability to test for, and quantify, multiple pathogens in the same clinical sample, and to detect antibiotic resistant strains within hours. The design principles of molecular beacons have also spawned a variety of allied technologies.

  11. Molecular microbial ecology manual

    NARCIS (Netherlands)

    Kowalchuk, G.A.; Bruijn, de F.J.; Head, I.M.; Akkermans, A.D.L.

    2004-01-01

    The field of microbial ecology has been revolutionized in the past two decades by the introduction of molecular methods into the toolbox of the microbial ecologist. This molecular arsenal has helped to unveil the enormity of microbial diversity across the breadth of the earth's ecosystems, and has

  12. Principles of molecular oncology

    National Research Council Canada - National Science Library

    Bronchud, Miguel H

    2008-01-01

    ...-threatening diseases. Many new molecularly targeted diagnostics and therapeutics described in this text, developed based on the rapid growth in our understanding of the molecular basis of cancer, already substantially improve survival of patients with previously lethal malignancies, and also improve quality of life because of fewer toxicities. Clearly re...

  13. Molecular Typing and Differentiation

    Science.gov (United States)

    In this chapter, general background and bench protocols are provided for a number of molecular typing techniques in common use today. Methods for the molecular typing and differentiation of microorganisms began to be widely adopted following the development of the polymerase chai...

  14. Principles of molecular oncology

    National Research Council Canada - National Science Library

    Bronchud, Miguel H; Thomas, E. Donnall; Weatherall, D. J; Crowther, D. G

    2004-01-01

    ...-threatening diseases. Many new molecularly targeted diagnostics and therapeutics described in this text, developed based on the rapid growth in our understanding of the molecular basis of cancer, already substantially improve survival of patients with previously lethal malignancies, and also improve quality of life because of fewer toxicities. Clearly re...

  15. Ionic and Molecular Liquids

    DEFF Research Database (Denmark)

    Chaban, Vitaly V.; Prezhdo, Oleg

    2013-01-01

    applications of RTILs in combination with molecular liquids, concentrating on three significant areas: (1) the use of molecular liquids to decrease the viscosity of RTILs; (2) the role of RTIL micelle formation in water and organic solvents; and (3) the ability of RTILs to adsorb pollutant gases. Current...

  16. Molecular Stirrers in Action

    NARCIS (Netherlands)

    Chen, Jiawen; Kistemaker, Jos C. M.; Robertus, Jort; Feringa, Ben L.

    2014-01-01

    A series of first-generation light-driven molecular motors with rigid substituents of varying length was synthesized to act as "molecular stirrers". Their rotary motion was studied by H-1 NMR and UV-vis absorption spectroscopy in a variety of solvents with different polarity and viscosity.

  17. Molecular subgroups of medulloblastoma

    OpenAIRE

    Northcott, Paul A; Dubuc, Adrian M; Pfister, Stefan; Taylor, Michael D

    2012-01-01

    Recent efforts at stratifying medulloblastomas based on their molecular features have revolutionized our understanding of this morbidity. Collective efforts by multiple independent groups have subdivided medulloblastoma from a single disease into four distinct molecular subgroups characterized by disparate transcriptional signatures, mutational spectra, copy number profiles and, most importantly, clinical features. We present a summary of recent studies that have contributed to our understand...

  18. Caracterización molecular de aislamientos invasores colombianos de Streptococcus pneumoniae serotipo 5, recuperados entre 1994 y 2004

    Directory of Open Access Journals (Sweden)

    Sandra Carolina Firacative Ropero

    2006-01-01

    resistentes a tetraciclina y cloranfenicol, estuvieron relacionados con el patrón electroforético A (n=32 y los subtipos A16 (n=1 y A28 (n=1, caracterizados por presentar una banda de 340 Kb, al igual que el clon. Estos resultados muestran la prevalencia y circulación continua de aislamientos de S. pneumoniae serotipo 5, los cuales están genéticamente relacionados con el clon 19-Colombia.

  19. Theoretical molecular biophysics

    CERN Document Server

    Scherer, Philipp O J

    2017-01-01

    This book gives an introduction to molecular biophysics. It starts from material properties at equilibrium related to polymers, dielectrics and membranes. Electronic spectra are developed for the understanding of elementary dynamic processes in photosynthesis including proton transfer and dynamics of molecular motors. Since the molecular structures of functional groups of bio-systems were resolved, it has become feasible to develop a theory based on the quantum theory and statistical physics with emphasis on the specifics of the high complexity of bio-systems. This introduction to molecular aspects of the field focuses on solvable models. Elementary biological processes provide as special challenge the presence of partial disorder in the structure which does not destroy the basic reproducibility of the processes. Apparently the elementary molecular processes are organized in a way to optimize the efficiency. Learning from nature by means exploring the relation between structure and function may even help to b...

  20. USO DE MARCADORES BIOQUÍMICOS Y MOLECULARES EN ESTUDIOS DE DIVERSIDAD GENÉTICA.

    OpenAIRE

    Becerra V., Viviana; Paredes C., Mario

    2000-01-01

    En las últimas décadas ha habido un notorio aumento en los marcadores genéticos disponibles para estudios de diversidad genética. Algunos de ellos tienen diferentes bases moleculares, pero todos están enfocados a determinar la organización de la estructura genética en las poblaciones naturales y cultivadas. Además, ellos muestran la similitud entre y dentro de las poblaciones evitando el efecto ambiental. Conocer la similitud entre los individuos y las poblaciones es de gran utilidad en los p...

  1. Um estudo sobre as relações entre os conflitos interpessoais e o bullying entre escolares

    Directory of Open Access Journals (Sweden)

    Loriane Trombini Frick

    2013-01-01

    Full Text Available A pesquisa que deu origem a este estudo teve por objetivo analisar as relações entre os estilos de resolução de conflitos adotados pelos professores e os modos de agir dos alunos perante conflitos entre pares e a possível incidência de bullying, em duas classes dos anos iniciais do Ensino Fundamental de duas escolas públicas de um município do interior de São Paulo. A metodologia utilizada caracterizou-se por uma abordagem quantitativa e qualitativa, aproximando-se de um estudo de caso. Para a coleta de dados, realizaram-se observações nas duas classes, preencheu-se uma ficha para caracterização dos ambientes sociomorais e aplicou-se dois questionários aos alunos: um com histórias hipotéticas de conflitos, baseado em Vicentin; outro sobre bullying, inspirado nos instrumentos de Olweus e de Ortega, Mora-Merchán e Mora. Evidenciou-se que as relações interpessoais estabelecidas na escola, em especial na sala de aula, formam um determinado ambiente sociomoral e influenciam no modo como os alunos interagem e resolvem conflitos, bem como, na possível prática do bullying.Abstract The research aimed to analyzing the relationship between the styles of conflict resolution adopted by the teachers and the students' ways of acting facing conflicts between peers and the possible incidence of bullying in two classes of the early years of two elementary public schools in a city in the interior of São Paulo state. The methodology is quantitative and qualitative approach, which approximates a case study. For data collection, observations were conducted in two classrooms, a form was filled up for characterization of socio moral environments and two questionnaires were applied to students: one with stories of hypothetical conflicts based on Vicentin; another on bullying, inspired in Olweus and Ortega-Mora and Mora Merchán’s instruments. It became evident that interpersonal relationships established in school, especially in the classroom

  2. O cinema do futuro: Entre novas e tradicionais tecnologias, entre a morte e a reinvenção

    Directory of Open Access Journals (Sweden)

    Julio Bezerra

    2010-03-01

    Full Text Available O cinema não é mais a experiência audiovisual matriz em nossa “sociedade das imagens”. Essa enorme rede heterogênea que vai se constituindo no terreno da produção e circulação de imagens-sons tem nos mostrado que é preciso mudar a nossa percepção do lugar do cinema entre os demais dispositivos. O objetivo deste texto é pensar o cinema em suas relações com o que vem sendo chamado de novas mídias. Nossa posição se aproxima de certa maneira de Phillipe Dubois: afirmando o cinema como uma espécie de referência fundante para todo o audiovisual sem ressentimentos e/ou opiniões fechadas com relação às novas tecnologias. Neste caminho, passamos invariavelmente por algumas falsas questões, pela melancólica idéia da “morte do cinema”, pelo surgimento de uma novíssima cinefilia digital e rizomática, por um cinema contemporâneo pra lá de impuro.

  3. Determinantes de la precarización laboral en Argentina entre 2003-2013. Entre los cambios y las continuidades

    Directory of Open Access Journals (Sweden)

    Marcelo Delfini

    2016-06-01

    Full Text Available El crecimiento económico experimentado por Argentina desde 2003 ha tenido su correlato en la mejora de los indicadores laborales. No obstante, la precarización laboral se ha mantenido, luego de una baja importante, hasta 2007, en valores muy elevados. Partiendo de la idea central que la precarización constituye para el capital una reducción de costos, el objetivo de este artículo es dar cuenta de los determinantes de la informalidad entre los trabajadores asalariados y establecer continuidades y cambios durante 2003 y 2013. Para ello, utilizamos una metodología cuantitativa con fuentes secundarias de información, dde acuerdo con las cuales realizamos dos tipo de análisis: el primero de carácter descriptivo, a partir del cual se busca dar cuenta de las características del mercado de trabajo argentino durante 1990 y 2013, y el segundo se realiza por medio de una regresión logística binomial, que permite acercarnos a los determinantes de la precarización de las condiciones de trabajo. En este sentido, se pudo observar que durante 2003 y 2013 se consolidó una precarización laboral, cuyos determinantes no lograron modificarse sustancialmente durante los años de referencia

  4. Alergenos: relación entre función biológica y alergenicidad

    Directory of Open Access Journals (Sweden)

    Homero San Juan

    1998-03-01

    Full Text Available Los alergenos se encuentran en muy diversas fuentes, pero, tienen la particularidad de inducir la producción de inmunoglobulina E (IgE y provocar alergia. No se conoce una característica molecular biológica común entre los alergenos que explique su capacidad alergénica. En los últimos años, se han demostrado o inferido diferentes funciones biológicas en los alergenos, generando nuevas hipótesis sobre el papel de dichas funciones en la actividad alergénica. Con el fin de identificar qué funciones biológicas se han demostrado o inferido en los alergenos y analizar su posible influencia en el papel alergénico, se revisaron aproximadamente doscientos alergenos teniendo como base los ya caracterizados por el Comité de Nomenclatura de Alergenos de la OMS, como también otros menos caracterizados pero con algunas propiedades fisicoquímicas conocidas. Los alergenos se agruparon de acuerdo con la actividad biológica y se tabularon con su fuente de origen, peso molecular (PM, punto isoeléctrico (pl, frecuencia de reactividad en la población alérgica, potenciales sitios de glicosilación y formación de enlaces disulfuro. Se identificaron 88 alergenos en los que se ha informado alguna actividad biológica. El agrupamiento de estos según la actividad produjo los siguientes resultados: enzimática (47,2%, inhibición de enzimas (11,3%, transporte (18,1%, regulación de la actividad celular (15,9% y otras actividades como la de conferir resistencia a enfermedades en plantas y citólisis (7,9%. En muchos de estos alergenos, la actividad biológica ha sido inferida por su homología estructural con proteínas de función conocida, pero los experimentos que corroboren dicha función no se han realizado. La mayoría de estos alergenos tienen en común PM

  5. Os diferentes contratos de trabalho entre trabalhadores qualificados brasileiros.

    Directory of Open Access Journals (Sweden)

    Marcia Carvalho de Azevedo

    2014-06-01

    Full Text Available Ao longo das últimas décadas, as relações de trabalho têm se modificado de forma contínua na direção de contratos mais flexíveis vis-à-vis relações de trabalho mais estáveis e de longo prazo. Essas transformações também têm atingido o mercado de trabalho brasileiro, ainda que este tenha características distintas das economias mais desenvolvidas. No Brasil, as relações de trabalho sempre tiveram um forte componente de flexibilidade, uma vez que o emprego formal e o informal são igualmente importantes na economia do país. Apesar da informalidade presente no cenário brasileiro, trabalhadores qualificados brasileiros mantiveram vínculos de trabalho estáveis, com contratos CLT, ao longo da segunda metade do século passado. Entretanto, esse panorama tem sido modificado nas últimas décadas. Apesar da constatação dessas mudanças no mercado de trabalho, pesquisas que investigam a disseminação de diferentes tipos de contrato de trabalho no mercado brasileiro são escassas. Dados referentes a profissionais qualificados são ainda mais raros. Tendo esse cenário como pano de fundo, esta pesquisa tem como objetivo identificar os diferentes tipos de contrato de trabalho existentes entre trabalhadores qualificados no Brasil. Para isso, discute os resultados de uma pesquisa empírica e apresenta, com base na literatura e nos dados de 47 entrevistas com trabalhadores, 15 tipos de contrato de trabalho que se distinguem do padrão CLT. Os resultados mostram que, dada essa diversidade, as relações flexíveis de trabalho não podem ser tratadas como um processo homogêneo. Os dados também retratam uma realidade preocupante. Podemos dizer que existe um descompasso dentro do contexto brasileiro entre as relações de trabalho atuais e o ambiente no qual elas estão inseridas. A sociedade brasileira e a legislação trabalhista estão estruturadas com base nas relações de trabalho formais. As organizações muitas vezes não sabem

  6. Compatibilidad sexual entre dos tipos de Hylocerus (Cactaceae

    Directory of Open Access Journals (Sweden)

    Roberta Castillo M

    2003-09-01

    Full Text Available Dos de los tipos de pitahaya mas cultivados en la Península de Yucatán, México, difieren principalmente por el color de su cáscara, el primero es de color rojo (Uqroo1, perteneciente a Hylocereus undatus, mientras que en el segundo es color amarillo claro (Uqroo2, hasta el momento también identificado como H. undatus; este último es mas dulce. En ambos tipos de pitahayas, se realizaron autopolinizaciones y polinizaciones cruzadas directas y recíprocas, con el propósito de evaluar el efecto en la cantidad de frutos que lograron su desarrollo. Se midieron algunas variables para detectar la influencia del progenitor paterno en algunas características del fruto. Los testigos se obtuvieron de flores polinizadas libremente. El diseño experimental utilizado fue completamente al azar, con 15 repeticiones por tratamiento. Se encontró que Uqroo1 es autocompatible, mientras que Uqroo2 es autoincompatible. Los testigos de ambos tipos alcanzaron el mismo peso, y los frutos de Uqroo2 logrados por polinización cruzada tuvieron un peso similar al de los testigos o fueron significativamente mas pesados. Algunas variables resultaron positivamente correlacionados; el coeficiente entre el número de semillas y el peso total del fruto fue de r = 0.84. La correlación mas alta (r = 0.97 resultó entre el peso total y el peso de la pulpa. En los frutos obtenidos por polinización cruzada prevalecieron las características del progenitor materno. Se recomienda cultivar la Pitahaya blanca con otro tipo de pitahaya, además de Uqroo1There are two types of pitahaya that are cultivated in Yucatan Peninsula of Mexico. They differ mainly in the skin color of the fruit, one of them has a red skin (Uqroo1, while the other has a light yellow skin (Uqroo2 both belong to Hylocereus undatus (Haworth Britt. & Rose. The yellow skin pitahaya is the sweetest. The studies were conducted using the methods of self pollination and cross pollination, with direct crosses and

  7. Componente del insaponificable del aceite de oliva con polaridad comprendida entre el escualeno y los alcoholes triterpénicos

    Directory of Open Access Journals (Sweden)

    Lanzón, A.

    1992-10-01

    Full Text Available In the unsaponifiable matter of refined olive oils and, frequently, virgin olive oils of bad quality, a new compound with polarity between those of squalene and triterpenic alcohols was isolated. Mass spectrometry of this compound and of their hydrogenated and; sililated derivatives, demonstrated that the compound was a long chain alcohol having 426 of molecular weight, polyisoprenic structure similar to that of squalene, and the hydroxyl group attached at the C-2 carbon atom.

    Se ha estudiado y determinado la estructura de un compuesto, de polaridad comprendida entre el escualeno y los alcoholes triterpénicos, que se encuentra en el insaponificable de los aceites de oliva refinados y en muchas ocasiones en el de los vírgenes, sobre todo en los de baja calidad. La espectrometría de masas del mismo y, de sus derivados hidrogenado y sililado, ha puesto de manifiesto que se trata de un alcohol triterpénico lineal, de peso molecular 426, con el esqueleto similar al del escualeno y con el grupo hidroxilo en posición 2.

  8. Molecular Population Genetics.

    Science.gov (United States)

    Casillas, Sònia; Barbadilla, Antonio

    2017-03-01

    Molecular population genetics aims to explain genetic variation and molecular evolution from population genetics principles. The field was born 50 years ago with the first measures of genetic variation in allozyme loci, continued with the nucleotide sequencing era, and is currently in the era of population genomics. During this period, molecular population genetics has been revolutionized by progress in data acquisition and theoretical developments. The conceptual elegance of the neutral theory of molecular evolution or the footprint carved by natural selection on the patterns of genetic variation are two examples of the vast number of inspiring findings of population genetics research. Since the inception of the field, Drosophila has been the prominent model species: molecular variation in populations was first described in Drosophila and most of the population genetics hypotheses were tested in Drosophila species. In this review, we describe the main concepts, methods, and landmarks of molecular population genetics, using the Drosophila model as a reference. We describe the different genetic data sets made available by advances in molecular technologies, and the theoretical developments fostered by these data. Finally, we review the results and new insights provided by the population genomics approach, and conclude by enumerating challenges and new lines of inquiry posed by increasingly large population scale sequence data. Copyright © 2017 Casillas and Barbadilla.

  9. EDITORIAL: Molecular Imaging Technology

    Science.gov (United States)

    Asai, Keisuke; Okamoto, Koji

    2006-06-01

    'Molecular Imaging Technology' focuses on image-based techniques using nanoscale molecules as sensor probes to measure spatial variations of various species (molecular oxygen, singlet oxygen, carbon dioxide, nitric monoxide, etc) and physical properties (pressure, temperature, skin friction, velocity, mechanical stress, etc). This special feature, starting on page 1237, contains selected papers from The International Workshop on Molecular Imaging for Interdisciplinary Research, sponsored by the Ministry of Education, Culture, Sports, Science and Technology (MEXT) in Japan, which was held at the Sendai Mediatheque, Sendai, Japan, on 8 9 November 2004. The workshop was held as a sequel to the MOSAIC International Workshop that was held in Tokyo in 2003, to summarize the outcome of the 'MOSAIC Project', a five-year interdisciplinary project supported by Techno-Infrastructure Program, the Special Coordination Fund for Promotion of Science Technology to develop molecular sensor technology for aero-thermodynamic research. The workshop focused on molecular imaging technology and its applications to interdisciplinary research areas. More than 110 people attended this workshop from various research fields such as aerospace engineering, automotive engineering, radiotechnology, fluid dynamics, bio-science/engineering and medical engineering. The purpose of this workshop is to stimulate intermixing of these interdisciplinary fields for further development of molecular sensor and imaging technology. It is our pleasure to publish the seven papers selected from our workshop as a special feature in Measurement and Science Technology. We will be happy if this issue inspires people to explore the future direction of molecular imaging technology for interdisciplinary research.

  10. Condicoes dentarias entre adultos brasileiros de 1986 a 2010

    Directory of Open Access Journals (Sweden)

    Sergio do Nascimento

    2013-12-01

    Full Text Available OBJETIVO: Identificar tendências do padrão da cárie dentária em adultos brasileiros. MÉTODOS: Foram utilizados dados provenientes de levantamentos epidemiológicos realizados pelo Ministério da Saúde nos anos de 1986, 2003 e 2010. A experiência de cárie, expressa pelo índice CPOD (dentes permanentes cariados, perdidos e obturados, e a saúde dentária, expressa pelo índice OH-D (dentes hígidos + obturados relativo ao número de dentes funcionais, foram comparadas em amostras aleatórias de residentes de 35 a 44 anos de idade em cada região brasileira. As diferenças nas condições dentárias entre os anos foram estimadas por meio da razão dos valores dos índices, empregando-se análise de regressão de Poisson ajustada pela idade. RESULTADOS: Houve reduções no índice CPOD e aumento no índice OH-D em todas as regiões no período de 1986 a 2010. A região Norte, que tinha o pior padrão em 1986, apresentou o maior ganho em termos de dentição funcional. CONCLUSÕES: Tem ocorrido uma transição da saúde bucal para melhor nos adultos brasileiros. É plausível que a adição de flúor à água e ao creme dental, maior incorporação de serviços restauradores e a melhoria nos indicadores de desenvolvimento humano decorrentes de políticas públicas estejam relacionados a essa melhora.

  11. Locos entre cuerdos, cuerdos en ambientes patológicos

    Directory of Open Access Journals (Sweden)

    Rodríguez-Arias Palomo, José Luis

    2013-10-01

    Full Text Available Mental Health moves within a territory of uncertain boundaries: weather a behavior is considered healthy or sick depends on factors such as the historical moment, the culture and society in which the diagnosis is made or simply the professional’s ideology on the matter. In this paper, the borders between madness and sanity will be explored from the point of view of Radical Constructivism (Watzlawick, 1988. The classification criteria currently used in Mental Health units will be questioned through a series of examples which reveal their instability and fuzziness. The thesis behind this debate is that the autonomy of the patient should be considered precisely in this context of relativity. Though “mad”, they have equal rights to sane people to decide over their own existence and their own ways of leading their lives.La Salud Mental se mueve en un territorio con límites imprecisos: la consideración de un comportamiento como sano o enfermo depende del momento histórico, de la sociedad y la cultura en la que se produce o, sencillamente, de la ideología del profesional que califica ese comportamiento. Desde la perspectiva del Constructivismo Radical se exploran estos límites entre la locura y la cordura y se cuestionan los criterios de clasificación al uso en los Servicios de Salud Mental a través de una serie de ejemplos, que ponen de relieve la inestabilidad de estos y la oscuridad de los mismos. La idea que atraviesa este debate es que la autonomía de los pacientes cobra protagonismo, precisamente, en la relatividad del diagnóstico en Salud Mental, ya que, aunque “locos”, tienen igual derecho que los cuerdos a decidir sobre su propia existencia y su propio estilo de vivir.

  12. La photographie industrielle entre image documentaire et image publicitaire

    Directory of Open Access Journals (Sweden)

    Régis Huguenin

    2009-12-01

    Full Text Available La chocolaterie Suchard à Neuchâtel (Suisse réalise des photographies de natures très diverses qu’elle diffuse dans des cercles plus ou moins restreints. En 1967, elle inaugure un entrepôt automatique, point d’orgue d’une restructuration quasi complète de la production et dont des clichés réalisés avant et pendant les journées « portes ouvertes » témoignent. En nous intéressant aux documents iconographiques relatant l’inauguration d’un bâtiment industriel chez Suchard, nous montrons comment l’image produit une réalité qu’elle n’incarne pas automatiquement. On montre ou on cache, on accentue ou on atténue en fonction des objectifs recherchés. C’est le cas aussi des légendes qui accompagnent les clichés, toutes axées sur la rationalisation mais n’évoquant jamais les conséquences sociales de la nouvelle stratégie productive. L’oscillation entre document et publicité est en prise directe avec le temps : celui du travail du photographe, celui de la sélection par l’entreprise, celui de la perception par les employés ou par le public, le temps du classement et de l’oubli avant celui de l’exhumation et de la réutilisation  des documents par l’entreprise pour une commémoration.

  13. Entre mitos y realidades: ciudades mexicanas que concentran clase creativa

    Directory of Open Access Journals (Sweden)

    Jaime Sobrino

    2016-01-01

    Full Text Available El propósito del presente documento consiste en realizar un estudio exploratorio sobre los atributos demográficos y económicos de las ciudades de México en donde se concentra la clase creativa, es decir, aquel segmento de la oferta ocupacional en el mercado urbano de trabajo que se compone por profesionistas, profesores universitarios, investigadores, trabajadores del arte, espectáculos y deportes. El término clase creativa fue propuesto por Richard Florida (2002, y a este segmento de la población ocupada se le ha dado una connotación de ventaja competitiva para la ciudad en donde reside, de tal manera que se ha tratado de comprobar la relación entre el desempeño económico local y la presencia de dicha clase. Aquí no se utiliza a la clase creativa como variable explicativa del comportamiento económico local. Más bien se busca aportar elementos sobre las características de las ciudades con mayor intensidad de clase creativa en su estructura ocupacional. Para alcanzar el propósito se realiza un modelo de regresión logística multivariada. Los resultados permiten concluir que las ciudades donde se concentraba la clase creativa en 2010 eran preferentemente capitales estatales y/o con baja participación de la producción manufacturera en su estructura económica. Asimismo, los ocupados en la clase creativa tuvieron mayor tasa de migración interna con respecto a la población ocupada total. Los lugares de origen y destino de la migración creativa fueron ciudades especializadas, ambas en este tipo de ocupados.

  14. O PROTAGONISMO INDÍGENA ENTRE CAMPOS MULTI E INTERDISCIPLINARES

    Directory of Open Access Journals (Sweden)

    Lígia Duque Platero

    2014-12-01

    Full Text Available O livro Missões, Militância Indigenista e Protagonismo Indígena é uma coletânea de artigos que orbitam ao redor das temáticas Missões religiosas e conversão religiosa, educação, terras e reterritorialização, sempre associados à questão do protagonismo indígena. Os artigos escolhidos para esta coletânea foram trabalhos apresentados nas XIII Jornadas Internacionais sobre as Missões Jesuíticas, realizada em Dourados, no Mato Grosso do Sul, de 30 de agosto a 03 de setembro de 2010. Os organizadores são a doutora em Antropologia e Teologia Graciela Chamorro e o doutor em História Protasio Paulo Langer. Esta coletânea contém dezessete artigos e uma entrevista. Os artigos são provenientes de diversas disciplinas e alguns deles são interdisciplinares. Do campo científico, há artigos da História, Etno-história, Etno-musicologia, Antropologia, Sociologia e Geografia. O livro também contém artigos da área de Teologia. A proposta da coletânea é a reunião de artigos que expressam as intrincadas relações interculturais e interpolíticas estabelecidas entre missionários, indigenistas e os povos indígenas na América do Sul.

  15. ANÁLISE DESCRITIVA: COMPARAÇÃO ENTRE METODOLOGIAS

    Directory of Open Access Journals (Sweden)

    Valéria Paula Rodrigues Minim

    2010-06-01

    Full Text Available Métodos sensoriais descritivos são de grande importância na indústria de alimentos para definir a qualidade sensorial de um produto. A análise descritiva quantitativa (ADQ é um método muito usado para identificar e quantficar os atributos sensoriais de alimentos. As etapas para realização da ADQ são: recrutamento e pré-seleção dos candidatos à julgadores, levantamento e descrição dos atributos, treinamento e seleção final dos julgadores e avaliação dos produtos. Visto que a ADQ requer treinamento longo dos julgadores, uma nova metodologia descritiva por ordenação (ADO foi desenvolvida recentemente , na qual algumas etapas são semelhantes à ADQ, porém o treinamento e a seleção final dos julgadores não acontecem e a avaliação dos produtos é realizada por ordenação da intensidade dos atributos, sendo a ADO um método mais econômico e rápido. O presente trabalho comparou a nova metodologia descritiva (ADO com o método tradicionalmente utilizado, a ADQ, por meio da descrição sensorial de quatro marcas de requeijão cremoso. Os atributos que caracterizaram os produtos foram: cor, aroma e sabor característicos, gosto doce, gosto salgado, sabor de ranço, consistência e viscosidade. Observou-se correlação significativa (p<0,05 entre as metodologias para 62,5% dos atributos avaliados. Assim, quando o objetivo é identificar diferenças sensoriais mais acentuadas a ADO pode ser usada em substituição a ADQ.

  16. Relaciones entre autoestima y estresores percibidos en estudiantes universitarios

    Directory of Open Access Journals (Sweden)

    Ramón G. Cabanach

    2014-06-01

    Full Text Available Siguiendo la línea de los trabajos que inciden en el papel de los recursos personales como factores de protección frente al estrés, la presente investigación pretende analizar la relación entre la autoestima y la percepción de estresores académicos en el contexto universitario. En concreto, analizamos en qué medida los niveles de autoestima (alto, medio y bajo influyen diferencialmente en el grado en que el estudiante valora como amenazantes diversas circunstancias propias del día a día académico. Se evalúan también qué factores de este contexto son los que el estudiante percibe como más estresantes. Participaron en el estudio 465 estudiantes de Fisioterapia de diversas universidades españolas. Para la medida de la autoestima, se empleó la Escala de Autoestima de Rosenberg. Los estresores académicos percibidos se evaluaron mediante la Escala de Estresores Académicos (E-CEA, que forma parte del Cuestionario de Estrés Académico (CEA. Nuestros resultados indican que las intervenciones en público, los exámenes y las deficiencias metodológicas del profesorado constituyen, por este orden, los principales sucesos que el estudiante percibe como amenazantes. Asimismo, se constata que cuanto mayor es la autovalía del estudiante, menor es la percepción del contexto académico como estresante

  17. Las descargas de contenidos audiovisuales en Internet entre estudiantes universitarios

    Directory of Open Access Journals (Sweden)

    2016-07-01

    Full Text Available El presente trabajo analiza el fenómeno de las descargas de contenidos audiovisuales –películas y series de televisión– que habitualmente practican los universitarios a través de Internet; sus actitudes ante las descargas ilegales y la formación que tienen en relación a la situación legal de las mismas. Estas cuestiones conforman una realidad que aunque a priori parece ser demasiado frecuente, se encuentra todavía muy poco explorada y es escasamente tratada desde una perspectiva científica en nuestro contexto. Los datos se obtuvieron a partir de un cuestionario diseñado ad hoc, administrado a estudiantes de tres Grados universitarios (Comunicación Audiovisual, Educación Primaria y Educación Social, por considerar que se trata de titulaciones en las que un conocimiento de base ético y legal ante las descargas de contenidos en la red es urgente y necesario para unos jóvenes que se están preparando con el propósito de dedicarse a la formación e información de los futuros ciudadanos del siglo XXI. Los resultados del estudio muestran cómo el consumo de contenidos procedentes de la industria audiovisual (televisiva y cinematográfica, es una práctica asentada entre los universitarios, que tienen actitudes claramente favorables hacia ella pero que prestan escasa importancia a cuestiones éticas y legales ante las descargas no legales, además de tener muy baja formación en estas cuestiones. Los resultados sugieren la necesidad de poner en marcha acciones educomunicativas para mejorar sus competencias informacionales y digitales.

  18. Transferencia de conocimiento entre comunidades científicas

    Directory of Open Access Journals (Sweden)

    Echeverría Ezponda, Javier

    2008-06-01

    Full Text Available Several epistemic innovations (Knowledge’s advances may be considered to be a result of processes of knowledge transfer among different scientific scientific communities. In addition to generate knowledge in their different specialization’s fields, scientists use knowledge produced in diverse scientific fields. By reinterpreting von Hippel’s (2005 proposals, we analyze different sources of epistemic innovation and apply that model to concrete examples; suppliers (ISI, distributors (Nature, Science and transdisciplinary users of the scientific knowledge. We conclude that transfer’ processes can generate innovation if they are produced between knowledge’ networks with different innovation’s nodes. This kind of proposals can be applied to different types of knowledge (science, technology, arts, culture and even so to knowledge’s transmission to society.Algunas innovaciones epistémicas (avances del conocimiento pueden ser analizadas como resultado de procesos de transferencia de conocimiento entre diferentes comunidades científicas. Los científicos no sólo producen conocimiento en su ámbito de especialización, además son usuarios del conocimiento que otros han producido en campos distintos. Reinterpretando las propuestas de von Hippel (2005, se analizan otras fuentes de innovación epistémica, mencionando ejemplos concretos: los suministradores (ISI, distribuidores (Nature, Science y el uso transdisciplinario del conocimiento científico. Se concluye que los procesos de transferencia que pueden generar innovaciones se producen en redes de conocimiento con diferentes nodos de innovación. Estas propuestas pueden aplicarse a otras modalidades de conocimiento (ciencia, tecnología, arte, cultura, e incluso a la transmisión del conocimiento a la sociedad.

  19. Síndrome frágil X: correlación clínica, citogenética y molecular en una familia

    Directory of Open Access Journals (Sweden)

    Aracely Lantigua Cruz

    1997-08-01

    Full Text Available Estudios recientes han permitido caracterizar molecularmente el defecto genético o mutación FMR-1 del síndrome frágil X. Esta mutación consiste en variaciones de repeticiones del triplete CGG del gen, que varían del rango normal a la mutación completa y pasan por rangos intermedios o premutaciones. Debido a que el individuo afectado además expresa un porcentaje variable de sitio frágil Xq27.3 (FRAXA en su cariotipo, en este trabajo se presenta una correlación clínica y citogenética con la caracterización molecular del gen FMR-1 realizada por 2 métodos directos: Southern blot y reacción en cadena de la polimerasa (PCR en 5 varones afectados y 5 mujeres portadoras, a propósito del diagnóstico prenatal en una de ellas. El análisis de las caracterizaciones clínicas, físicas y neuropsicológicas previamente delineadas, llevaron a la conclusión de que éstas, así como la frecuencia en porcentaje de FRAXA, se correlacionan en los varones afectados con la elongación que experimenta la mutación al trasmitirse de una generación a la siguiente a través de mujeres portadoras, en quienes por otra parte, estas características son heterogéneas y susceptibles a sobrelapamiento tanto por efecto genómico como por factores ambientales psicofamiliares.Recent studies have allowed to characterize molecularly the genetic defect or FMR-1 mutation of the fragile X syndrome. This mutation consists in variations of repetitions of the gene's CGG triplet that came from the normal range to the complete mutation, passing through intermediate ranges or premutations. Due to the fact that the affected individual also shows a variable percentage of Xq27.3 fragile site (FRAXA in his karyotype, it is presented in this paper a clinical and cytogenetic correlation with the molecular characterization of the FMR-1 gen carried out by 2 direct methods: Southern Blot and polymerase chain reaction (PCR in 5 affected males and 5 female carriers, one of them with

  20. Molecularly Imprinted Membranes

    Science.gov (United States)

    Trotta, Francesco; Biasizzo, Miriam; Caldera, Fabrizio

    2012-01-01

    Although the roots of molecularly imprinted polymers lie in the beginning of 1930s in the past century, they have had an exponential growth only 40–50 years later by the works of Wulff and especially by Mosbach. More recently, it was also proved that molecular imprinted membranes (i.e., polymer thin films) that show recognition properties at molecular level of the template molecule are used in their formation. Different procedures and potential application in separation processes and catalysis are reported. The influences of different parameters on the discrimination abilities are also discussed. PMID:24958291

  1. Photoionization and molecular structure

    International Nuclear Information System (INIS)

    Palma, A.

    1983-01-01

    A presentation is here given of the theoretical work on photoionization and molecular structure carried out by the author and coworkers. The implications of the photoionization process on the molecular geometry are emphasized. In particular, the ionization effect on deep orbitals is considered and it is shown that, contrary to traditional thinking, these orbitals have relevant effects on the molecular geometry. The problem of calculating photoionization relative intensities for the full spectrum is also considered, and the results of the present model are compared with experimental and other theoretical results. (author)

  2. Advances in molecular nutrition: nutrigenomics and/or nutrigenetics

    OpenAIRE

    Marti, A; Moreno-Aliaga, M.ª J; Zulet, M.ª A; Martínez, J. A

    2005-01-01

    La aplicación de las técnicas de la biología molecular y el éxito del Proyecto Genoma Humano ha abierto una nueva era tanto en Medicina como en Nutrición. Hasta la fecha, al menos, 1.000 genes humanos causantes de enfermedades han sido identificados y parcialmente caracterizados, el 97% de los cuales sabemos ahora que son causantes de enfermedades monogénicas. Sin embargo, otras patologías como la obesidad, enfermedad cardiovascular, diabetes, cáncer se deben a complejas interacciones entre d...

  3. Polypeptides Based Molecular Electronics

    National Research Council Canada - National Science Library

    Lam, Yeng M; Mhaisalkar, Subodh; Li, Lain-Jong; Dravid, Vinayak P; Shekhawat, Gajendra S; Suri, Raman

    2008-01-01

    ... the formation of molecular devices such as transistors, diodes, and sensors. We have designed the peptides, arranged them on substrates using self-assembly, Dip-PEN nanolithography, and also e-beam assisted lithography...

  4. Molecular electronic junction transport

    DEFF Research Database (Denmark)

    Solomon, Gemma C.; Herrmann, Carmen; Ratner, Mark

    2012-01-01

    Whenasinglemolecule,oracollectionofmolecules,isplacedbetween two electrodes and voltage is applied, one has a molecular transport junction. We discuss such junctions, their properties, their description, and some of their applications. The discussion is qualitative rather than quantitative, and f...

  5. Atomic and Molecular Interactions

    International Nuclear Information System (INIS)

    2002-01-01

    The Gordon Research Conference (GRC) on Atomic and Molecular Interactions was held at Roger Williams University, Bristol, RI. Emphasis was placed on current unpublished research and discussion of the future target areas in this field

  6. Noncovalent Molecular Electronics.

    Science.gov (United States)

    Gryn'ova, G; Corminboeuf, C

    2018-05-03

    Molecular electronics covers several distinctly different conducting architectures, including organic semiconductors and single-molecule junctions. The noncovalent interactions, abundant in the former, are also often found in the latter, i.e., the dimer junctions. In the present work, we draw the parallel between the two types of noncovalent molecular electronics for a range of π-conjugated heteroaromatic molecules. In silico modeling allows us to distill the factors that arise from the chemical nature of their building blocks and from their mutual arrangement. We find that the same compounds are consistently the worst and the best performers in the two types of electronic assemblies, emphasizing the universal imprint of the underlying chemistry of the molecular cores on their diverse charge transport characteristics. The interplay between molecular and intermolecular factors creates a spectrum of noncovalent conductive architectures, which can be manipulated using the design strategies based upon the established relationships between chemistry and transport.

  7. The Molecular Foundry (TMF)

    Data.gov (United States)

    Federal Laboratory Consortium — Founded in 2006 by the Department of Energy (DOE), the Molecular Foundry is a critical part of the DOE's National Nanotechnology Initiative, a multi-agency framework...

  8. Molecular ion photofragment spectroscopy

    International Nuclear Information System (INIS)

    Bustamente, S.W.

    1983-11-01

    A new molecular ion photofragment spectrometer is described which features a supersonic molecular beam ion source and a radio frequency octapole ion trap interaction region. This unique combination allows several techniques to be applied to the problem of detecting a photon absorption event of a molecular ion. In particular, it may be possible to obtain low resolution survey spectra of exotic molecular ions by using a direct vibrational predissociation process, or by using other more indirect detection methods. The use of the spectrometer is demonstrated by measuring the lifetime of the O 2 + ( 4 π/sub u/) metastable state which is found to consist of two main components: the 4 π/sub 5/2/ and 4 π/sub -1/2/ spin components having a long lifetime (approx. 129 ms) and the 4 π/sub 3/2/ and 4 π/sub 1/2/ spin components having a short lifetime (approx. 6 ms)

  9. Crossed molecular beams

    International Nuclear Information System (INIS)

    Lee, Y.T.

    1976-01-01

    Research activities with crossed molecular beams at Lawrence Berkeley Laboratory during 1976 are described. Topics covered include: scattering of Ar*, Kr*, with Xe; metastable rare gas interactions, He* + H 2 ; an atomic and molecular halogen beam source; a crossed molecular beam study of the Cl + Br 2 → BrCl + Br reaction; O( 3 P) reaction dynamics, development of the high pressure plasma beam source; energy randomization in the Cl + C 2 H 3 Br → Br + C 2 H 3 Cl reaction; high resolution photoionization studies of NO and ICl; photoionization of (H 2 O)/sub n/ and (NH 3 ) 2 ; photoionization mass spectroscopy of NH 3 + and O 3 + ; photo fragmentation of bromine; and construction of chemiluminescence-laser fluorescence crossed molecular beam machine

  10. Molecular Electronic Shift Registers

    Science.gov (United States)

    Beratan, David N.; Onuchic, Jose N.

    1990-01-01

    Molecular-scale shift registers eventually constructed as parts of high-density integrated memory circuits. In principle, variety of organic molecules makes possible large number of different configurations and modes of operation for such shift-register devices. Several classes of devices and implementations in some specific types of molecules proposed. All based on transfer of electrons or holes along chains of repeating molecular units.

  11. Molecular imaging in oncology

    Energy Technology Data Exchange (ETDEWEB)

    Schober, Otmar; Riemann, Burkhard (eds.) [Universitaetsklinikum Muenster (Germany). Klinik fuer Nuklearmedizin

    2013-02-01

    Considers in detail all aspects of molecular imaging in oncology, ranging from basic research to clinical applications in the era of evidence-based medicine. Examines technological issues and probe design. Discusses preclinical studies in detail, with particular attention to multimodality imaging. Presents current clinical use of PET/CT, SPECT/CT, and optical imagingWritten by acknowledged experts. The impact of molecular imaging on diagnostics, therapy, and follow-up in oncology is increasing significantly. The process of molecular imaging includes key biotarget identification, design of specific molecular imaging probes, and their preclinical evaluation, e.g., in vivo using small animal studies. A multitude of such innovative molecular imaging probes have already entered clinical diagnostics in oncology. There is no doubt that in future the emphasis will be on multimodality imaging in which morphological, functional, and molecular imaging techniques are combined in a single clinical investigation that will optimize diagnostic processes. This handbook addresses all aspects of molecular imaging in oncology, ranging from basic research to clinical applications in the era of evidence-based medicine. The first section is devoted to technology and probe design, and examines a variety of PET and SPECT tracers as well as multimodality probes. Preclinical studies are then discussed in detail, with particular attention to multimodality imaging. In the third section, diverse clinical applications are presented, and the book closes by looking at future challenges. This handbook will be of value to all who are interested in the revolution in diagnostic oncology that is being brought about by molecular imaging.

  12. Human papillomavirus molecular biology.

    Science.gov (United States)

    Harden, Mallory E; Munger, Karl

    Human papillomaviruses are small DNA viruses with a tropism for squamous epithelia. A unique aspect of human papillomavirus molecular biology involves dependence on the differentiation status of the host epithelial cell to complete the viral lifecycle. A small group of these viruses are the etiologic agents of several types of human cancers, including oral and anogenital tract carcinomas. This review focuses on the basic molecular biology of human papillomaviruses. Copyright © 2016 Elsevier B.V. All rights reserved.

  13. Molecular imaging in oncology

    International Nuclear Information System (INIS)

    Schober, Otmar; Riemann, Burkhard

    2013-01-01

    Considers in detail all aspects of molecular imaging in oncology, ranging from basic research to clinical applications in the era of evidence-based medicine. Examines technological issues and probe design. Discusses preclinical studies in detail, with particular attention to multimodality imaging. Presents current clinical use of PET/CT, SPECT/CT, and optical imagingWritten by acknowledged experts. The impact of molecular imaging on diagnostics, therapy, and follow-up in oncology is increasing significantly. The process of molecular imaging includes key biotarget identification, design of specific molecular imaging probes, and their preclinical evaluation, e.g., in vivo using small animal studies. A multitude of such innovative molecular imaging probes have already entered clinical diagnostics in oncology. There is no doubt that in future the emphasis will be on multimodality imaging in which morphological, functional, and molecular imaging techniques are combined in a single clinical investigation that will optimize diagnostic processes. This handbook addresses all aspects of molecular imaging in oncology, ranging from basic research to clinical applications in the era of evidence-based medicine. The first section is devoted to technology and probe design, and examines a variety of PET and SPECT tracers as well as multimodality probes. Preclinical studies are then discussed in detail, with particular attention to multimodality imaging. In the third section, diverse clinical applications are presented, and the book closes by looking at future challenges. This handbook will be of value to all who are interested in the revolution in diagnostic oncology that is being brought about by molecular imaging.

  14. Nanoplatform-based molecular imaging

    National Research Council Canada - National Science Library

    Chen, Xiaoyuan

    2011-01-01

    "Nanoplathform-Based Molecular Imaging provides rationale for using nanoparticle-based probes for molecular imaging, then discusses general strategies for this underutilized, yet promising, technology...

  15. Cardiovascular Molecular Imaging

    International Nuclear Information System (INIS)

    Lee, Kyung Han

    2009-01-01

    Molecular imaging strives to visualize processes in living subjects at the molecular level. Monitoring biochemical processes at this level will allow us to directly track biological processes and signaling events that lead to pathophysiological abnormalities, and help make personalized medicine a reality by allowing evaluation of therapeutic efficacies on an individual basis. Although most molecular imaging techniques emerged from the field of oncology, they have now gradually gained acceptance by the cardiovascular community. Hence, the availability of dedicated high-resolution small animal imaging systems and specific targeting imaging probes is now enhancing our understanding of cardiovascular diseases and expediting the development of newer therapies. Examples include imaging approaches to evaluate and track the progress of recent genetic and cellular therapies for treatment of myocardial ischemia. Other areas include in vivo monitoring of such key molecular processes as angiogenesis and apoptosis. Cardiovascular molecular imaging is already an important research tool in preclinical experiments. The challenge that lies ahead is to implement these techniques into the clinics so that they may help fulfill the promise of molecular therapies and personalized medicine, as well as to resolve disappointments and controversies surrounding the field

  16. Molecular toxicity of nanomaterials.

    Science.gov (United States)

    Chang, Xue-Ling; Yang, Sheng-Tao; Xing, Gengmei

    2014-10-01

    With the rapid developments in the fields of nanoscience and nanotechnlogy, more and more nanomaterials and their based consumer products have been used into our daily life. The safety concerns of nanomaterials have been well recognized by the scientific community and the public. Molecular mechanism of interactions between nanomaterials and biosystems is the most essential topic and final core of the biosafety. In the last two decades, nanotoxicology developed very fast and toxicity phenomena of nanomaterials have been reported. To achieve better understanding and detoxication of nanomaterials, thorough studies of nanotoxicity at molecular level are important. The interactions between nanomaterials and biomolecules have been widely investigated as the first step toward the molecular nanotoxicology. The consequences of such interactions have been discussed in the literature. Besides this, the chemical mechanism of nanotoxicology is gaining more attention, which would lead to a better design of nontoxic nanomaterials. In this review, we focus on the molecular nanotoxicology and explore the toxicity of nanomaterials at molecular level. The molecular level studies of nanotoxicology are summarized and the published nanotoxicological data are revisited.

  17. Nexos estratégicos entre la retórica y la publicidad

    Directory of Open Access Journals (Sweden)

    Luis Gallardo Vera

    2011-06-01

    Full Text Available El presente artículo contribuye a establecer nexos estratégicos entre la retórica y la publicidad. La adopción del prisma estratégico en los estudios retóricos de la publicidad no es común, sin embargo, la relación entre retórica y publicidad a un nivel estratégico es evidente, teniendo presente los estudios que han investigado la simbiosis entre las dos actividades.Del universo compuesto por las investigaciones sobre retórica y publicidad se seleccionó una muestra de las obras susceptibles de responder a la pregunta de cuáles son los nexos estratégicos entre la retórica y la publicidad. Con este criterio se conformó una muestra teóricamente conducida del universo. La hipótesis de partida ha sido que, si existen documentos que indaguen en la relación entre la retórica y la publicidad, es posible construir un documento que muestre de un modo amplio cuáles son los nexos estratégicos entre ambas actividades. Finalmente, se contrastó que, efectivamente, este documento es único al mostrar ampliamente cuáles son los nexos estratégicos existentes entre la retórica y la publicidad.

  18. Democracia Liberal: uma novidade já desbotada entre jovens

    Directory of Open Access Journals (Sweden)

    Renata Florentino

    2008-06-01

    Full Text Available Este artigo busca mostrar a relação da juventude brasiliense com a política institucional, revelando o que está por trás da rejeição aos políticos profissionais e às instituições que ocupam. Em vez de estereotipar a postura crítica destes e destas jovens, sem antes analisar serenamente o contexto em que essa crítica surge, procurou-se mostrar o lugar de fala, a arena política em que surge essa crítica. Nessa arena, encontra-se uma democracia institucionalizada, com eleições estáveis, mas que não corresponde às expectativas que foram geradas com a sua implementação, junto com uma população bem informada e impactada por ações governamentais ou a ausência destas. Sem louvores ou reprovações, há que se perguntar se esta descrença da política institucional revela apenas uma desconexão de mundos ou a abertura de espaço para o surgimento de novas formas de organização política. O artigo trabalha com dados da PNAD 2005 e o Índice de Desenvolvimento Juvenil da UNESCO sobre a caracterização da juventude de Brasília e dados do TSE, sobre o alistamento eleitoral facultativo entre jovens.This article intends to analize the relationship between the city of Brasília´s youth and the institutional politics. We show what is behind the rejection to professional politicians and to the institutions they control. Instead of stereotipyze the critical behavior of the youth, we first analyze the context where this refusal takes place. We find an established democracy, with stable elections, but not corresponding to the expectations created during its implementation, added to a population that is well informed about the youth, it is necessary to ask if this lack of trust on institutional politics shows disconected worlds or a opened space to the emergence of new forms of political organization. This article is based on 2005 PNAD (National Research by Housing sample data and the Youth Development Index of UNESCO, to describe the

  19. Enfermedad pulmonar obstructiva: diferencias entre hombres y mujeres

    Directory of Open Access Journals (Sweden)

    María Soledad Rodríguez-Pecci

    2012-06-01

    Full Text Available La enfermedad pulmonar obstructiva crónica (EPOC ha aumentado su prevalencia en el sexo femenino. Los casos de mujeres se describen como más sintomáticas. A pesar de que la EPOC se ha vinculado a elevado riesgo cardiovascular, hay pocos estudios sobre diferencias por sexo. El objetivo de nuestro estudio fue determinar la influencia del sexo sobre calidad de vida y síntomas, tratamiento, factores de riesgo y enfermedad cardiovascular (ECV en una población de pacientes con EPOC. En este estudio prospectivo observacional de corte transversal, se incluyeron pacientes con EPOC ingresados consecutivamente entre el 1 de septiembre de 2008 al 1 de marzo de 2010. Se registraron edad, sexo, habito tabáquico, factores de riesgo y enfermedad cardiovascular, tratamiento y gravedad de la EPOC. Se midió índice tobillo-brazo (ITB y se realizó Euroqol-5D. Se incluyeron 246 pacientes (195 hombres. Los hombres fueron más ex fumadores (68.7% vs. 15.7%, p < 0.001, tuvieron un VEF1 menor (48.7% ± 15.7 vs. 58.2% ± 10.9 de teórico, p < 0.001 y mayor frecuencia de cardiopatía isquémica (16.4% vs. 5.9%, p = 0.04. Las mujeres presentaron más prevalencia de EPOC sin exposición al tabaco (64.7% vs. 7.2%, p < 0.001, más síntomas de ansiedad y depresión (p = 0.004 e ITB alterado en menor frecuencia (20% vs. 41.6%, p = 0.01. Concluimos que hubo diferencias en la EPOC en relación al sexo, con compromiso pulmonar y cardiovascular más grave en hombres y más síntomas de ansiedad y depresión en mujeres.

  20. Avaliação da qualidade de correctivos orgânicos comercializados na região de Entre Douro e Minho Quality evaluation of organic composts commercialized in the region of Entre Douro e Minho

    Directory of Open Access Journals (Sweden)

    J. Oliveira

    2009-01-01

    Full Text Available Quando não devidamente maturados, os compostos orgânicos podem causar fitotoxicidade, prejudicando o desenvolvimento das culturas e a produção. Esse efeito está frequentemente relacionado com a libertação de ácidos orgânicos de baixo peso molecular, de azoto na forma amoniacal e de dióxido de carbono. Este estudo tem como objectivo avaliar a qualidade de correctivos orgânicos em comercialização no Entre Douro e Minho. Para tal, procedeu-se a uma amostragem dos correctivos orgânicos disponíveis em treze cooperativas agrícolas da região do Entre Douro e Minho, e à elaboração de um pequeno inquérito. Na apreciação da qualidade, utilizaram-se os métodos químicos e biológicos. Os resultados obtidos permitem concluir que a qualidade dos compostos deve ser melhorada. Importa referir que, embora os resultados da apreciação da qualidade dos compostos efectuados com base na proposta de norma para a apreciação da qualidade do composto orgânico de Souteiro & Baptista (2001 indiquem que todos os compostos avaliados apresentam parâmetros químicos limitativos, os resultados da avaliação biológica revelam-se mais positivos.The maturity degree is a basic parameter in the apreciation of the quality of organic composts. When unstable or without enough maturity the organic amendment can cause phytotoxity by liberation of volatile organic acids, ammonium or carbon dioxide. With the present work we attempt to quantify the effective quality of composts in comercialization at Entre-Douro-e Minho farmers associations. Quality of composts were evaluated by chemical and biological methods. The results allow us to conclude that the quality of the organic composts must be improved. While the results of the chemical evaluation classify all samples as bad, biological evaluations bellow a better judgement.

  1. Nanotechnology Review: Molecular Electronics to Molecular Motors

    Science.gov (United States)

    Srivastava, Deepak; Saini, Subhash (Technical Monitor)

    1998-01-01

    Reviewing the status of current approaches and future projections, as already published in scientific journals and books, the talk will summarize the direction in which computational and experimental nanotechnologies are progressing. Examples of nanotechnological approaches to the concepts of design and simulation of carbon nanotube based molecular electronic and mechanical devices will be presented. The concepts of nanotube based gears and motors will be discussed. The above is a non-technical review talk which covers long term precompetitive basic research in already published material that has been presented before many US scientific meeting audiences.

  2. Soporte social, familiar y autoconcepto: relación entre los constructos

    Directory of Open Access Journals (Sweden)

    Makilim Nunes Baptista

    2012-01-01

    Full Text Available El objetivo del estudio fue verificar las asociaciones entre el soporte social, el soporte familiar y el autoconcepto en un grupo de hombres y mujeres. En el caso de los hombres hubo correlaciones negativas entre el soporte familiar y los factores negligencia, agresividad e indiferencia del instrumento de autoconcepto. En el grupo de mujeres el soporte familiar total fue correlacionado positivamente con sensualidad y responsabilidad, y negativamente con inseguridad, siendo las tres medidas del instrumento de autoconcepto. Al considerar las relaciones entre el soporte familiar y el soporte social, todas fueron positivas, tanto en los hombres como en las mujeres.

  3. Las relaciones de comercio e inversión entre Colombia y Venezuela

    OpenAIRE

    Eglé Iturbe de Blanco

    1997-01-01

    Venezuela y Colombia cuentan con una larga trayectoria histórica en sus relaciones económicas. Comercian entre ellas y sus nacionales a lo largo de la frontera desde su nacimiento como naciones e interactúan entre ambos países como si fuera uno solo. Al norte, en la península de la Guajira, viven poblaciones indígenas comunes cuyo sustento es el comercio entre ambos lados de la frontera; y al sur, en los estados andinos venezolanos limítrofes con los llanos colombianos, tradicionalmente se ha...

  4. Violencia sexual entre compañeros y violencia en parejas adolescentes

    OpenAIRE

    Ortega Ruiz, Rosario; Ortega Rivera, Francisco Javier; Sánchez Jiménez, Virginia

    2008-01-01

    El presente estudio ha analizado la presencia de violencia sexual entre compañeros y en las parejas adolescentes y jóvenes. Específicamente se han estudiado las diferencias por sexo, edad y estadio de la relación sentimental tanto en violencia sexual entre iguales como en las parejas, en una muestra de 490 adolescentes (55,7% chicos, 44,3% chicas, edad media 16.08 años). Los resultados descriptivos mostraron la misma incidencia de violencia sexual entre iguales y en las pa...

  5. "Cy Twombly: Intérprete de dos mundos" [Un artista entre Estados Unidos y Europa, entre lo clásico y lo contemporáneo

    OpenAIRE

    Gras Cruz, Irene

    2017-01-01

    Esta tesis “Cy Twombly: Intérprete de dos mundos” [Un artista entre Estados Unidos y Europa, entre lo clásico y lo contemporáneo] pretende dar a conocer al artista norteamericano Cy Twombly (1928-2011) en nuestro país y destacar la importancia que tiene dentro del panorama artístico como figura clave en un momento de efervescencia —artística y creativa— americana en el que a diferencia de sus coetáneos prefirió emigrar a Europa, concretamente a Italia. Mientras todos se trasladaban a la nueva...

  6. Molecular diagnostic of the philadelphia chromosome; Diagnostico molecular del cromosoma filadelfia

    Energy Technology Data Exchange (ETDEWEB)

    Campos Rudin, M [Instituto de Investigaciones en Salud (INISA), Costa Rica (Costa Rica) and Escuela de Biologia; Cuenca Berger, P [Instituto de Investigaciones en Salud (INISA), Costa Rica (Costa Rica) and Escuela de Biologia; Gutierrez Espeleta, G [Instituto de Investigaciones en Salud (INISA), Costa Rica (Costa Rica) and Escuela de Biologia; Jimenez Cruz, G [Hospital Mexico, Costa Rica (Costa Rica). Seccion Hematologia; Montero Umana, C [Hospital Mexico, Costa Rica (Costa Rica). Seccion Hematologia; Vazquez Castillo, L [Hospital San Juan de Dios, Costa Rica (Costa Rica). Seccion de Hematologia; Ramon Ortiz, M [Hospital San Juan de Dios, Costa Rica (Costa Rica). Seccion de Hematologia

    1998-07-01

    The importance that has to confirm the presence or absence of the chromosome Philadelphia in the diagnostic and follow up of the patient affected with chronic myeloid leukemia and other leukemia. It is considered necessary to implement the molecular diagnostic in Costa Rica. They studied 32 patient affected by Chronic Myeloid Leukemia, 7 by other Myeloproliferative Chronic Disorders and 2 by Myelodysplastic Syndrome. It utilized the sound Trans probe-1 (Oncogene Science, Inc), which was marked with radioactivity ({sup 32}P) or chemiluminescence (digoxigenin). Of the 32 cases affected by L mc, in 28 it was possible to carry out the molecular analysis detecting the characteristic translocation of the chromosome Philadelphia among the Mbcr/c-ABL genes in 21 (75%) of the patients, in 7 (25%) the rearrangement was not found. In seven of the nine affected by other sufferings it was possible to obtain results, 3 that turned out to be positive for the rearrangement among Mbcr/c-ABL and 4 normal. In all the cases, they obtained results marking the sound with radioactivity. However, they tested the marks with digoxigenin in seven of the patients, as an methodological alternative for the laboratories that lacks the requirements to work with radiation. The results obtained were identical. (S. Grainger) [Spanish] La relevancia que tiene confirmar la presencia o ausencia del cromosoma Filadelfia en el diagnostico y seguimiento de los pacientes afectados con leucemia mieloide cronica y otras leucemias, se considero necesario implementar el diagnostico molecular en Costa Rica. Se estudiaron 32 pacientes afectados por Leucemia Mieloide Cronica, 7 por otros Desordenes Mieloproleferativos Cronicos y 2 por Sindromes Mielodisplasicos. Se utilizo la sonda Transprobe-1 (Oncogene Science, Inc), la cual fue marcada con radioactividad ({sup 32}P) o quimioluminiscencia (digoxigenina). De los 32 casos afectados por LMC, en 28 se logro realizar el analisis molecular detectandose la

  7. Molecular dewetting on insulators

    International Nuclear Information System (INIS)

    Burke, S A; Topple, J M; Gruetter, P

    2009-01-01

    Recent attention given to the growth and morphology of organic thin films with regard to organic electronics has led to the observation of dewetting (a transition from layer(s) to islands) of molecular deposits in many of these systems. Dewetting is a much studied phenomenon in the formation of polymer and liquid films, but its observation in thin films of the 'small' molecules typical of organic electronics requires additional consideration of the structure of the interface between the molecular film and the substrate. This review covers some key concepts related to dewetting and molecular film growth. In particular, the origins of different growth modes and the thickness dependent interactions which give rise to dewetting are discussed in terms of surface energies and the disjoining pressure. Characteristics of molecular systems which may lead to these conditions, including the formation of metastable interface structures and commensurate-incommensurate phase transitions, are also discussed. Brief descriptions of some experimental techniques which have been used to study molecular dewetting are given as well. Examples of molecule-on-insulator systems which undergo dewetting are described in some detail, specifically perylene derivatives on alkali halides, C 60 on alkali halides, and the technologically important system of pentacene on SiO 2 . These examples point to some possible predicting factors for the occurrence of dewetting, most importantly the formation of an interface layer which differs from the bulk crystal structure. (topical review)

  8. Molecular dewetting on insulators.

    Science.gov (United States)

    Burke, S A; Topple, J M; Grütter, P

    2009-10-21

    Recent attention given to the growth and morphology of organic thin films with regard to organic electronics has led to the observation of dewetting (a transition from layer(s) to islands) of molecular deposits in many of these systems. Dewetting is a much studied phenomenon in the formation of polymer and liquid films, but its observation in thin films of the 'small' molecules typical of organic electronics requires additional consideration of the structure of the interface between the molecular film and the substrate. This review covers some key concepts related to dewetting and molecular film growth. In particular, the origins of different growth modes and the thickness dependent interactions which give rise to dewetting are discussed in terms of surface energies and the disjoining pressure. Characteristics of molecular systems which may lead to these conditions, including the formation of metastable interface structures and commensurate-incommensurate phase transitions, are also discussed. Brief descriptions of some experimental techniques which have been used to study molecular dewetting are given as well. Examples of molecule-on-insulator systems which undergo dewetting are described in some detail, specifically perylene derivatives on alkali halides, C(60) on alkali halides, and the technologically important system of pentacene on SiO(2). These examples point to some possible predicting factors for the occurrence of dewetting, most importantly the formation of an interface layer which differs from the bulk crystal structure.

  9. Phylogenetic molecular function annotation

    International Nuclear Information System (INIS)

    Engelhardt, Barbara E; Jordan, Michael I; Repo, Susanna T; Brenner, Steven E

    2009-01-01

    It is now easier to discover thousands of protein sequences in a new microbial genome than it is to biochemically characterize the specific activity of a single protein of unknown function. The molecular functions of protein sequences have typically been predicted using homology-based computational methods, which rely on the principle that homologous proteins share a similar function. However, some protein families include groups of proteins with different molecular functions. A phylogenetic approach for predicting molecular function (sometimes called 'phylogenomics') is an effective means to predict protein molecular function. These methods incorporate functional evidence from all members of a family that have functional characterizations using the evolutionary history of the protein family to make robust predictions for the uncharacterized proteins. However, they are often difficult to apply on a genome-wide scale because of the time-consuming step of reconstructing the phylogenies of each protein to be annotated. Our automated approach for function annotation using phylogeny, the SIFTER (Statistical Inference of Function Through Evolutionary Relationships) methodology, uses a statistical graphical model to compute the probabilities of molecular functions for unannotated proteins. Our benchmark tests showed that SIFTER provides accurate functional predictions on various protein families, outperforming other available methods.

  10. Molecular MR imaging

    International Nuclear Information System (INIS)

    Fleige, G.; Hamm, B.

    2000-01-01

    Basic medicobiological research in recent years has made rapid advances in the functional understanding of normal and pathological processes down to the molecular level. At the same time, various imaging modalities have developed from the depiction of organs to approaching the depiction of the cellular level and are about to make the visualization of molecular processes an established procedure. Besides other modalities like PET and near-infrared fluorescence, MR imaging offers some promising options for molecular imaging as well as some applications that have already been tested such as the visualization of enzyme activity, the depiction of the expression of certain genes, the visualization of surface receptors, or the specific demonstration of cells involved in the body's immune response. A major advantage of molecular magnetic resonance imaging (mMRI) over other more sensitive modalities is its high spatial resolution. However, the establishment of mMRI crucially relies on further improvements in resolution and the development of molecular markers for improving its sensitivity and specificity. The state of the art of mMRI is presented by giving a survey of the literature on experimental studies and reporting the results our study group obtained during investigation on gliomas. (orig.) [de

  11. Molecularly targeted therapeutic radiopharmaceuticals

    International Nuclear Information System (INIS)

    Saw, M.M.

    2007-01-01

    Full text: It is generally agreed that current focus of nuclear medicine development should be on molecular imaging and therapy. Though, the widespread use of the terminology 'molecular imaging' is quite recent, nuclear medicine has used molecular imaging techniques for more than 20 years ago. A variety of radiopharmaceuticals have been introduced for the internal therapy of malignant and inflammatory lesions in nuclear medicine. In the field of bio/medical imaging, nuclear medicine is one of the disciplines which has the privilege of organized and well developed chemistry/ pharmacy section; radio-chemistry/radiopharmacy. Fundamental principles have been developed more than 40 years ago and advanced research is going well into postgenomic era. The genomic revolution and dramatically increased insight in the molecular mechanisms underlying pathology have led to paradigm shift in drug development. Likewise does in the nuclear medicine. Here, the author will present current clinical and pre-clinical therapeutic radiopharmaceuticals based on molecular targets such as membrane-bound receptors, enzymes, nucleic acids, sodium iodide symporter, etc, in correlation with fundamentals of radiopharmacy. (author)

  12. Entre cooperação reflexiva e democracia procedimental

    Directory of Open Access Journals (Sweden)

    Maria Eugenia Bunchaft

    2009-12-01

    Full Text Available A filosofia de Axel Honneth sobrereconhecimento procura analisar a relaçãoentre a teoria do desenvolvimento psíquicoe a evolução moral da sociedade, de forma aalcançar novos parâmetros capazes de renovara Teoria Crítica. O elemento fundamental doseu arcabouço teórico constitui a concepçãode identidade como uma luta intersubjetivapor reconhecimento mútuo. Por sua vez,Jürgen Habermas desenvolveu uma concepçãoprocedimentalista de direito e democracia,cujos influxos teóricos são fundamentais para afilosofia política do reconhecimento. Nas obrasA Inclusão do Outro e Direito e Democracia,o autor sublinha ser o sistema de direitossensível às demandas por reconhecimentode sociedades multiculturais, de forma quegrupos culturais devem articular em processosdeliberativos aquelas tradições que desejamperpetuar. Inobstante, para Honneth, ainstitucionalização de procedimentos capazesde alicerçar as expectativas normativas dasdemandas identitárias seria insuficiente paragarantir efetiva justiça social e, portanto,incapaz de abarcar o substrato moral inerenteàs lutas intersubjetivas por reconhecimento: aexperiência do desrespeito. Com efeito, pretendemos apresentar uma contraposição teórica entre o modelo procedimental habermasianoe o modelo de cooperação reflexiva desenvolvidopor Axel Honneth, a fim de aprofundara compreensão acerca da filosofia política doreconhecimento. The philosophy of Axel Honneth onrecognition analyzes the relationship betweenthe theory of psychological development and themoral development of society in order to reachnew parameters to renew Critical Theory. Thekey element of his theoretical framework is theconcept of identity as an intersubjective strugglefor mutual recognition. In turn, Jürgen Habermashas developed a procedural conception of lawand democracy, whose theoretical inflows arecritical to the political philosophy of recognition.In the works Inclusion of the Other and Lawand Democracy

  13. Desfasajes: entre la historieta y la política.

    Directory of Open Access Journals (Sweden)

    Palacios, Cristian

    2012-01-01

    Full Text Available [es] El concepto de desfase acuñado por la Teoría de los discursos sociales de Eliseo Verón en los años setenta quiere dar cuenta de un aspecto esencial de dicha teoría, es decir, la diferencia que se produce en la circulación del sentido entre la producción y el reconocimiento; viene aquí a ilustrar un caso particular de indeterminación constitutiva de un discurso conflictivo: la segunda versión de la historieta El Eternauta de Hector Germán Oesterheld, con dibujos de Alberto Breccia. Publicado en el semanario Gente en 1969, este experimento de historieta política en un medio que le era naturalmente adverso, inserta en el argumento de la primera versión una serie de lecciones de política aleccionadora, extrañas no sólo a la revista sino también al arte de Breccia que llegará a ser cuestionado por el mismo editor y que derivará en la suspensión de la publicación. Nos proponemos analizar este episodio de “fracaso” en la búsqueda de hacer conducir un mensaje político determinado en un medio de comunicación de masas – reconocido además por su frivolidad - y extraer algunas conclusiones sobre las formas de circulación del sentido en los discursos políticos de los años 60 y 70. [en] The notion of gap coined by the Social Discourses Theory of Eliseo Veron in the seventies wants to show an essential aspect of this theory: the difference between production and recognition in the spread of meaning; illustrated here a particular case of constitutive indeterminacy of a controversial discourse: the second version of El Eternauta by Hector German Oesterheld and Alberto Breccia. This comic published in the weekly popular magazine Gente in 1969 is a rare experiment of political graphic novel in a media that was hostile to its convictions. It inserts in the plot of the original version a series of politics instructive lessons, stranges not only to the magazine but to the art of Breccia, who will be questioned by the editor

  14. Entre a figura e o abstrato: instâncias do pensamento

    Directory of Open Access Journals (Sweden)

    Eduardo Augusto Alves Almeida

    2015-03-01

    Full Text Available Por meio de texto e pintura, este artigo visa discutir a possibilidade de habitar certo intervalo entre polos extremistas, e, a partir da estética, rever paradigmas dos pensamentos moderno e contemporâneo.

  15. Mass médias et figures du religieux islamique au Mali: entre ...

    African Journals Online (AJOL)

    Mass médias et figures du religieux islamique au Mali: entre négociation et appropriation de l'espace public. ... (development of means of transportation and communications technologies) and the extension of democratic rights and freedoms.

  16. Evolutionary molecular medicine.

    Science.gov (United States)

    Nesse, Randolph M; Ganten, Detlev; Gregory, T Ryan; Omenn, Gilbert S

    2012-05-01

    Evolution has long provided a foundation for population genetics, but some major advances in evolutionary biology from the twentieth century that provide foundations for evolutionary medicine are only now being applied in molecular medicine. They include the need for both proximate and evolutionary explanations, kin selection, evolutionary models for cooperation, competition between alleles, co-evolution, and new strategies for tracing phylogenies and identifying signals of selection. Recent advances in genomics are transforming evolutionary biology in ways that create even more opportunities for progress at its interfaces with genetics, medicine, and public health. This article reviews 15 evolutionary principles and their applications in molecular medicine in hopes that readers will use them and related principles to speed the development of evolutionary molecular medicine.

  17. [Molecular techniques in mycology].

    Science.gov (United States)

    Rodríguez-Tudela, Juan Luis; Cuesta, Isabel; Gómez-López, Alicia; Alastruey-Izquierdo, Ana; Bernal-Martínez, Leticia; Cuenca-Estrella, Manuel

    2008-11-01

    An increasing number of molecular techniques for the diagnosis of fungal infections have been developed in the last few years, due to the growing prevalence of mycoses and the length of time required for diagnosis when classical microbiological methods are used. These methods are designed to resolve the following aspects of mycological diagnosis: a) Identification of fungi to species level by means of sequencing relevant taxonomic targets; b) early clinical diagnosis of invasive fungal infections; c) detection of molecular mechanisms of resistance to antifungal agents; and d) molecular typing of fungi. Currently, these methods are restricted to highly developed laboratories. However, some of these techniques will probably be available in daily clinical practice in the near future.

  18. Theoretical Molecular Biophysics

    CERN Document Server

    Scherer, Philipp

    2010-01-01

    "Theoretical Molecular Biophysics" is an advanced study book for students, shortly before or after completing undergraduate studies, in physics, chemistry or biology. It provides the tools for an understanding of elementary processes in biology, such as photosynthesis on a molecular level. A basic knowledge in mechanics, electrostatics, quantum theory and statistical physics is desirable. The reader will be exposed to basic concepts in modern biophysics such as entropic forces, phase separation, potentials of mean force, proton and electron transfer, heterogeneous reactions coherent and incoherent energy transfer as well as molecular motors. Basic concepts such as phase transitions of biopolymers, electrostatics, protonation equilibria, ion transport, radiationless transitions as well as energy- and electron transfer are discussed within the frame of simple models.

  19. Molecular Diagnosis of Tuberculosis.

    Science.gov (United States)

    Nurwidya, Fariz; Handayani, Diah; Burhan, Erlina; Yunus, Faisal

    2018-01-01

    Tuberculosis (TB) is one of the leading causes of adult death in the Asia-Pacific Region, including Indonesia. As an infectious disease caused by Mycobacterium tuberculosis (MTB), TB remains a major public health issue especially in developing nations due to the lack of adequate diagnostic testing facilities. Diagnosis of TB has entered an era of molecular detection that provides faster and more cost-effective methods to diagnose and confirm drug resistance in TB cases, meanwhile, diagnosis by conventional culture systems requires several weeks. New advances in the molecular detection of TB, including the faster and simpler nucleic acid amplification test (NAAT) and whole-genome sequencing (WGS), have resulted in a shorter time for diagnosis and, therefore, faster TB treatments. In this review, we explored the current findings on molecular diagnosis of TB and drug-resistant TB to see how this advancement could be integrated into public health systems in order to control TB.

  20. Convergencias y divergencias entre los sistemas interamericano y el europeo de derechos humanos

    OpenAIRE

    Gasparoto, Ana Lucía

    2014-01-01

    Este trabajo tiene la finalidad de puntear las convergencias y las divergencias existentes entre la Corte Interamericana de Derechos Humanos y el Tribunal Europeo de Derechos Humanos, encima con la adopción del Protocolo 11 del Convenio Europeo para la Protección de los Derechos Humanos y las Libertades Fundamentales y su impacto en el Sistema Europeo de Derechos Humanos. Igualmente se analisa las relaciones entre las dos Cortes.

  1. Soutien aux collaborations entre pairs de l'Initiative Think tank et du ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    L'Initiative Think tank (ITT) et le Think Tank Fund (TTF) s'associent pour soutenir des collaborations entre pairs entre les think tanks établis dans les régions où oeuvrent l'ITT (Afrique, Amérique latine et Asie du Sud) et le TTF (Europe centrale, Europe de l'Est et ancienne Union soviétique). Ce soutien a pour objectif de ...

  2. relaPro : Base de datos para encontrar relaciones entre proyectos

    OpenAIRE

    Fortis Urbano, Julio

    2015-01-01

    Desarrollo de una base de datos para almacenar proyectos y una aplicación web de ejemplo que permite encontrar elementos comunes entre los proyectos almacenados en el sistema. Desenvolupament d'una base de dades per emmagatzemar projectes i una aplicació web d'exemple que permet trobar elements comuns entre els projectes emmagatzemats en el sistema. Bachelor thesis for the Computer Science program on Databases.

  3. Synergetics of molecular systems

    CERN Document Server

    Lupichev, Lev N; Kadantsev, Vasiliy N

    2014-01-01

    Synergetics is the quantitative study of multicomponent systems that exhibit nonlinear dynamics and cooperativity. This book specifically considers basic models of the nonlinear dynamics of molecular systems and discusses relevant applications in biological physics and the polymer sciences.Emphasis is placed on specific solutions to the dynamical equations that correspond to the coherent formation of spatial-temporal structures, such as solitons, kinks and breathers, in particular. The emergence of these patterns in molecular structures provides a variety of information on their structural pro

  4. Molecular environmental geochemistry

    Science.gov (United States)

    O'Day, Peggy A.

    1999-05-01

    The chemistry, mobility, and bioavailability of contaminant species in the natural environment are controlled by reactions that occur in and among solid, aqueous, and gas phases. These reactions are varied and complex, involving changes in chemical form and mass transfer among inorganic, organic, and biochemical species. The field of molecular environmental geochemistry seeks to apply spectroscopic and microscopic probes to the mechanistic understanding of environmentally relevant chemical processes, particularly those involving contaminants and Earth materials. In general, empirical geochemical models have been shown to lack uniqueness and adequate predictive capability, even in relatively simple systems. Molecular geochemical tools, when coupled with macroscopic measurements, can provide the level of chemical detail required for the credible extrapolation of contaminant reactivity and bioavailability over ranges of temperature, pressure, and composition. This review focuses on recent advances in the understanding of molecular chemistry and reaction mechanisms at mineral surfaces and mineral-fluid interfaces spurred by the application of new spectroscopies and microscopies. These methods, such as synchrotron X-ray absorption and scattering techniques, vibrational and resonance spectroscopies, and scanning probe microscopies, provide direct chemical information that can elucidate molecular mechanisms, including element speciation, ligand coordination and oxidation state, structural arrangement and crystallinity on different scales, and physical morphology and topography of surfaces. Nonvacuum techniques that allow examination of reactions in situ (i.e., with water or fluids present) and in real time provide direct links between molecular structure and reactivity and measurements of kinetic rates or thermodynamic properties. Applications of these diverse probes to laboratory model systems have provided fundamental insight into inorganic and organic reactions at

  5. Molecular cardiovascular imaging

    International Nuclear Information System (INIS)

    Schaefers, M.

    2007-01-01

    Although huge and long-lasting research efforts have been spent on the development of new diagnostic techniques investigating cardiovascular diseases, still fundamental challenges exist; the main challenge being the diagnosis of a suspected or known coronary artery disease or its consequences (myocardial infarction, heart failure etc.). Beside morphological techniques, functional imaging modalities are available in clinical diagnostic algorithms, whereas molecular cardiovascular imaging techniques are still under development. This review summarizes clinical-diagnostical challenges of modern cardiovascular medicine as well as the potential of new molecular imaging techniques to face these. (orig.)

  6. Targeted molecular imaging

    International Nuclear Information System (INIS)

    Kim, E. Edmund

    2003-01-01

    Molecular imaging aims to visualize the cellular and molecular processes occurring in living tissues, and for the imaging of specific molecules in vivo, the development of reporter probes and dedicated imaging equipment is most important. Reporter genes can be used to monitor the delivery and magnitude of therapeutic gene transfer, and the time variation involved. Imaging technologies such as micro-PET, SPECT, MRI and CT, as well as optical imaging systems, are able to non-invasively detect, measure, and report the simultaneous expression of multiple meaningful genes. It is believed that recent advances in reporter probes, imaging technologies and gene transfer strategies will enhance the effectiveness of gene therapy trials

  7. Substructured multibody molecular dynamics.

    Energy Technology Data Exchange (ETDEWEB)

    Grest, Gary Stephen; Stevens, Mark Jackson; Plimpton, Steven James; Woolf, Thomas B. (Johns Hopkins University, Baltimore, MD); Lehoucq, Richard B.; Crozier, Paul Stewart; Ismail, Ahmed E.; Mukherjee, Rudranarayan M. (Rensselaer Polytechnic Institute, Troy, NY); Draganescu, Andrei I.

    2006-11-01

    We have enhanced our parallel molecular dynamics (MD) simulation software LAMMPS (Large-scale Atomic/Molecular Massively Parallel Simulator, lammps.sandia.gov) to include many new features for accelerated simulation including articulated rigid body dynamics via coupling to the Rensselaer Polytechnic Institute code POEMS (Parallelizable Open-source Efficient Multibody Software). We use new features of the LAMMPS software package to investigate rhodopsin photoisomerization, and water model surface tension and capillary waves at the vapor-liquid interface. Finally, we motivate the recipes of MD for practitioners and researchers in numerical analysis and computational mechanics.

  8. Open source molecular modeling.

    Science.gov (United States)

    Pirhadi, Somayeh; Sunseri, Jocelyn; Koes, David Ryan

    2016-09-01

    The success of molecular modeling and computational chemistry efforts are, by definition, dependent on quality software applications. Open source software development provides many advantages to users of modeling applications, not the least of which is that the software is free and completely extendable. In this review we categorize, enumerate, and describe available open source software packages for molecular modeling and computational chemistry. An updated online version of this catalog can be found at https://opensourcemolecularmodeling.github.io. Copyright © 2016 The Author(s). Published by Elsevier Inc. All rights reserved.

  9. Molecular epidemiology of Blastocystis

    Directory of Open Access Journals (Sweden)

    Fadime Eroğlu

    2015-12-01

    Full Text Available Blastocystis pathogenicity and classification was newly illuminated with molecular genetic studies and recently the parasite was found in the focus of many researchers. Several molecular methods such as; polymerase chain reaction (PCR, PCR-restriction fragment length polymorphism, random amplified polymorphic DNA, real-time polymerase chain reaction and DNA sequencing analyses can be used in genotyping of Blastocystis. Blastocystis parasites may cause diarrhea, abdominal pain, bloating, gas, irritability, anorexia, cramps, vomiting, dehydration, insomnia, nausea, loss of appetite, weight loss, fatigue symptoms and also could be asymptomatic cases. In this review, it was aimed to summarize the associations between Blastocystis subtypes and pathogenicity.

  10. Valency and molecular structure

    CERN Document Server

    Cartmell, E

    1977-01-01

    Valency and Molecular Structure, Fourth Edition provides a comprehensive historical background and experimental foundations of theories and methods relating to valency and molecular structures. In this edition, the chapter on Bohr theory has been removed while some sections, such as structures of crystalline solids, have been expanded. Details of structures have also been revised and extended using the best available values for bond lengths and bond angles. Recent developments are mostly noted in the chapter on complex compounds, while a new chapter has been added to serve as an introduction t

  11. Ionic and Molecular Liquids

    DEFF Research Database (Denmark)

    Chaban, Vitaly V.; Prezhdo, Oleg

    2013-01-01

    Because of their outstanding versatility, room-temperature ionic liquids (RTILs) are utilized in an ever increasing number of novel and fascinating applications, making them the Holy Grail of modern materials science. In this Perspective, we address the fundamental research and prospective...... applications of RTILs in combination with molecular liquids, concentrating on three significant areas: (1) the use of molecular liquids to decrease the viscosity of RTILs; (2) the role of RTIL micelle formation in water and organic solvents; and (3) the ability of RTILs to adsorb pollutant gases. Current...

  12. Molecular confocal laser endomicroscopy

    DEFF Research Database (Denmark)

    Karstensen, John Gásdal; Klausen, Pia Helene; Saftoiu, Adrian

    2014-01-01

    While flexible endoscopy is essential for macroscopic evaluation, confocal laser endomicroscopy (CLE) has recently emerged as an endoscopic method enabling visualization at a cellular level. Two systems are currently available, one based on miniprobes that can be inserted via a conventional...... during on-going endoscopy), a novel world of molecular evaluation opens up. The method of molecular CLE could potentially be used for estimating the expression of important receptors in carcinomas, subsequently resulting in immediate individualization of treatment regimens, but also for improving...

  13. Preparación de tamices moleculares de carbono por CVD

    OpenAIRE

    Manso, R.; Pajares Somoano, Jesús Alberto; Albiniak, A.; Broniek, E.; Siemieniewska, T.

    2001-01-01

    [ES] Se han preparado tamices moleculares de carbono (CMS) mediante el dep sito de tomos de carbono, por pir lisis de benceno, sobre la superficie de carbones activados. La pir lisis de benceno a temperaturas comprendidas entre 650-850 ¼C genera el cierre progresivo de los microporos debido a la creaci n de constricciones en la red microporosa que limitan la accesibilidad de determinadas mol culas. El uso de temperaturas superiores a la temperatura de carbonizaci n del precursor (85...

  14. Molecular theory of capillarity

    CERN Document Server

    Rowlinson, J S

    2002-01-01

    History of thought on molecular origins of surface phenomena offers a critical and detailed examination and assessment of modern theories, focusing on statistical mechanics and application of results in mean-field approximation to model systems. Emphasis on liquid-gas surface, with a focus on liquid-liquid surfaces in the final chapters. 1989 edition.

  15. Reviews: The Molecular Animator.

    Science.gov (United States)

    Journal of Chemical Education, 1987

    1987-01-01

    Provided is a review of a chemical software package. The package makes possible an instructional technique that is not effective by any other means, namely the ability to view molecular shapes in three dimensions. The program can be used with either IBM or Apple hardware. (RH)

  16. [Towards a molecular psychiatry].

    Science.gov (United States)

    de la Fuente, J R

    1988-06-01

    Recent research data from psychopharmacology, brain imaging and molecular genetics support the notion of a new psychiatric frontier: that of molecular psychiatry. Identification of different subtypes of neurotransmitter receptors and their changes in density and sensitivity in response to endogenous ligands and/or psychotropic drugs may account for the clinical expression of various behavioral phenomena, including some psychiatric disorders. Brain imaging, in particular positron-emission tomographic evaluations, are likely to change psychiatric nosology. New diagnostic elements derived from these scanners will allow to associate psychotic states to neuroreceptor changes. Molecular genetics has shown that bipolar affective disorder can be caused by a single gene. A strong linkage seems to exist between a gene locus on chromosome 11 and bipolar illness. An amyloid gene located on chromosome 21 has also been shown to be strongly related to familial Alzheimer's disease. While genetic heterogeneity limits the screening value of these findings, the powerful techniques of molecular biology have entered the field of psychiatry. Ethical issues regarding DNA immortality, gene cloning and gene therapy will strengthen this relationship.

  17. Molecular studies of achondroplasia

    Directory of Open Access Journals (Sweden)

    Nahar Risha

    2009-01-01

    Full Text Available Background: Achondroplasia (ACH is the most frequent form of short-limbed dwarfi sm, caused by mutations in the FGFR3 gene. It follows an autosomal dominant inheritance, though most cases are sporadic. The molecular techniques are the only available methods to confi rm the diagnosis of a skeletal dysplasia. Clinical and radiological features are only suggestive and not confi rmatory. The present study was conducted to fi nd out how often the clinical diagnosis of achondroplasia is verifi ed on molecular studies. Materials and Methods: From 1998 through 2007, we carried out molecular analysis for the two common mutations in the FGFR3 gene in 130 cases clinically suspected to have ACH. Results: A diagnostic mutation was identifi ed in 53 (40.8% cases. The common mutation (1138G>A was present in 50 (94.7% of the positive cases, while the rare 1138 G>C substitution was found in three (5.3%. Conclusion: This study shows that confi rmation of clinical diagnosis of ACH by molecular genetic testing is essential to distinguish it from other skeletal dysplasias, to plan therapeutic options, and to offer genetic counseling. Management (medical and surgical in patients confi rmed to have ACH, is briefl y discussed.

  18. Molecular diagnosis and immunotherapy.

    Science.gov (United States)

    Sastre, Joaquín; Sastre-Ibañez, Marina

    2016-12-01

    To describe recent insights into how molecular diagnosis can improve indication and selection of suitable allergens for specific immunotherapy and increase the safety of this therapy. As specific allergen immunotherapy targets specific allergens, identification of the disease-eliciting allergen is a prerequisite for accurate prescription of treatment. In areas of complex sensitization to aeroallergens or in cases of hymenoptera venom allergy, the use of molecular diagnosis has demonstrated that it may lead to a change in indication and selection of allergens for immunotherapy in a large proportion of patients when compared with diagnosis based on skin prick testing and/or specific IgE determination with commercial extracts. These changes in immunotherapy prescription aided by molecular diagnosis have been demonstrated to be cost-effective in some scenarios. Certain patterns of sensitization to grass or olive pollen and bee allergens may identify patients with higher risk of adverse reaction during immunotherapy. Molecular diagnosis, when used with other tools and patients' clinical records, can help clinicians better to select the most appropriate patients and allergens for specific immunotherapy and, in some cases, predict the risk of adverse reactions. The pattern of sensitization to allergens could potentially predict the efficacy of allergen immunotherapy provided that these immunotherapy products contain a sufficient amount of these allergens. Nevertheless, multiplex assay remains a third-level approach, not to be used as screening method in current practice.

  19. Isotopes in molecular biology

    International Nuclear Information System (INIS)

    Goldfarb, P.S.G.

    1988-01-01

    The use of radioisotopes in molecular biology, with particular reference to the structure and functions of DNA, RNA and the cellular synthesis of proteins, is discussed. The use of labelled DNA and RNA in diagnostic techniques is presented. (U.K.)

  20. Biophysics of molecular gastronomy.

    Science.gov (United States)

    Brenner, Michael P; Sörensen, Pia M

    2015-03-26

    Chefs and scientists exploring biophysical processes have given rise to molecular gastronomy. In this Commentary, we describe how a scientific understanding of recipes and techniques facilitates the development of new textures and expands the flavor palette. The new dishes that result engage our senses in unexpected ways. PAPERCLIP. Copyright © 2015 Elsevier Inc. All rights reserved.

  1. Molecular gastronomy in Spain

    DEFF Research Database (Denmark)

    García-Segovia, P.; Garrido, M. D.; Vercet, A.

    2014-01-01

    Beyond the overwhelming international success of Ferrán Adria, Spain has been one of the countries with a more active implication in molecular gastronomy as a scientific discipline but also in the use of ingredients, technologies, and equipment from the scientific and technological universe...... with scientists for facing the future of Spanish gastronomy....

  2. Molecular Mechanisms of Preeclampsia

    Directory of Open Access Journals (Sweden)

    N. Vitoratos

    2012-01-01

    Full Text Available Preeclampsia is one of the leading causes of maternal morbidity/mortality. The pathogenesis of preeclampsia is still under investigation. The aim of this paper is to present the molecular mechanisms implicating in the pathway leading to preeclampsia.

  3. Molecular MR Imaging Probes

    OpenAIRE

    MAHMOOD, UMAR; JOSEPHSON, LEE

    2005-01-01

    Magnetic resonance imaging (MRI) has been successfully applied to many of the applications of molecular imaging. This review discusses by example some of the advances in areas such as multimodality MR-optical agents, receptor imaging, apoptosis imaging, angiogenesis imaging, noninvasive cell tracking, and imaging of MR marker genes.

  4. Molecular dynamics for fermions

    International Nuclear Information System (INIS)

    Feldmeier, H.; Schnack, J.

    2000-02-01

    The time-dependent variational principle for many-body trial states is used to discuss the relation between the approaches of different molecular dynamics models to describe indistinguishable fermions. Early attempts to include effects of the Pauli principle by means of nonlocal potentials as well as more recent models which work with antisymmetrized many-body states are reviewed under these premises. (orig.)

  5. Nanopatterning by molecular polygons.

    Science.gov (United States)

    Jester, Stefan-S; Sigmund, Eva; Höger, Sigurd

    2011-07-27

    Molecular polygons with three to six sides and binary mixtures thereof form long-range ordered patterns at the TCB/HOPG interface. This includes also the 2D crystallization of pentagons. The results provide an insight into how the symmetry of molecules is translated into periodic structures.

  6. Molecular radio-oncology

    Energy Technology Data Exchange (ETDEWEB)

    Baumann, Michael; Krause, Mechthild; Cordes, Nils (eds.) [Technische Univ. Dresden (Germany). Faculty of Medicine and University Hospital

    2016-07-01

    This book concisely reviews our current understanding of hypoxia, molecular targeting, DNA repair, cancer stem cells, and tumor pathophysiology, while also discussing novel strategies for putting these findings into practice in daily clinical routine. Radiotherapy is an important part of modern multimodal cancer treatment, and the past several years have witnessed not only substantial improvements in radiation techniques and the use of new beam qualities, but also major strides in our understanding of molecular tumor biology and tumor radiation response. Against this backdrop, the book highlights recent efforts to identify reasonable and clinically applicable biomarkers using broad-spectrum tissue microarrays and high-throughput systems biology approaches like genomics and epigenomics. In particular, it describes in detail how such molecular information is now being exploited for diagnostic imaging and imaging throughout treatment using the example of positron emission tomography. By discussing all these issues in the context of modern radiation oncology, the book provides a broad, up-to-date overview of the molecular aspects of radiation oncology that will hopefully foster its further optimization.

  7. Molecular radio-oncology

    International Nuclear Information System (INIS)

    Baumann, Michael; Krause, Mechthild; Cordes, Nils

    2016-01-01

    This book concisely reviews our current understanding of hypoxia, molecular targeting, DNA repair, cancer stem cells, and tumor pathophysiology, while also discussing novel strategies for putting these findings into practice in daily clinical routine. Radiotherapy is an important part of modern multimodal cancer treatment, and the past several years have witnessed not only substantial improvements in radiation techniques and the use of new beam qualities, but also major strides in our understanding of molecular tumor biology and tumor radiation response. Against this backdrop, the book highlights recent efforts to identify reasonable and clinically applicable biomarkers using broad-spectrum tissue microarrays and high-throughput systems biology approaches like genomics and epigenomics. In particular, it describes in detail how such molecular information is now being exploited for diagnostic imaging and imaging throughout treatment using the example of positron emission tomography. By discussing all these issues in the context of modern radiation oncology, the book provides a broad, up-to-date overview of the molecular aspects of radiation oncology that will hopefully foster its further optimization.

  8. Molecular Pathogenesis of Spondyloarthritis

    DEFF Research Database (Denmark)

    Carlsen, Thomas Gelsing

    This dissertation includes a presentation of knowledge on the molecular pathogenesis of spondyloarthritis achieved through a PhD programme at Aalborg University from 1.12.2011 - 1.12.2014. Work was carried out in the Laboratory of Medical Mass Spectrometry, headed by: Professor Svend Birkelund...

  9. Characterization of Mexican zeolite minerals; Caracterizacion de minerales zeoliticos mexicanos

    Energy Technology Data Exchange (ETDEWEB)

    Jimenez C, M.J

    2005-07-01

    50% of the Mexican territory is formed by volcanic sequences of the Pliocene type, which appear extensively in the northwest states (Sonora, Sinaloa, Chihuahua, Durango) and west of Mexico (Jalisco and Nayarit), in central Mexico (Zacatecas, Guanajuato, San Luis Potosi, Queretaro, Hidalgo) and south of Mexico (Guerrero, Oaxaca); therefore, it is to be expected that in our country big locations of natural zeolites exist in its majority of the clinoptilolite type. The present study was focused toward the characterization of two Mexican natural zeolite rocks presumably of the clinoptilolite and filipsite types, one of them comes from the state of Chihuahua and the other of a trader company of non metallic minerals, due that these materials are not characterized, its are not known their properties completely and therefore, the uses that can be given to these materials. In this investigation work it was carried out the characterization of two Mexican zeolite rocks, one coming from the Arroyo zone, municipality of La Haciendita, in the state of Chihuahua; and the other one was bought to a trader company of non metallic minerals. The two zeolites so much in their natural form as conditioned with sodium; they were characterized by means of X-ray diffraction, scanning electron microscopy of high vacuum and elementary microanalysis (EDS), surface area analysis (BET), thermal gravimetric analysis. To differentiate the heulandite crystalline phase of the other clinoptilolite rock, its were carried out thermal treatments. The quantification of Al, Na, Ca, K, Mg, Fe was carried out in solution, by means of atomic absorption spectroscopy and the quantity of Si was determined by gravimetry. The zeolite rocks presented for the major part the crystalline heulandite and clinoptilolite phases for the most part, and it was found that the zeolite coming from the state of Chihuahua possesses a bigger content of heulandite and the denominated filipsite it is really a zeolite clinoptilolite type. When comparing the obtained results of the elementary composition of the natural Mexican zeolites with those of zeolites clinoptilolite type from other places of the world it was found that the composition is similar as for its components and different as for its concentration. (Author)

  10. Characterization of clay minerals; Caracterizacion de minerales arcillosos

    Energy Technology Data Exchange (ETDEWEB)

    Diaz N, C.; Olguin, M.T.; Solache R, M.; Alarcon H, T.; Aguilar E, A. [Gerencia de Ciencias Basicas, Direccion de Investigacion Cientifica, Instituto Nacional de Investigaciones Nucleares, A.P. 18-1027, 11801 Mexico D.F. (Mexico)

    2002-07-01

    The natural clays are the more abundant minerals on the crust. They are used for making diverse industrial products. Due to the adsorption and ion exchange properties of these, a great interest for developing research directed toward the use of natural clays for the waste water treatment has been aroused. As part of such researches it is very important to carry out previously the characterization of the interest materials. In this work the results of the mineral and elemental chemical composition are presented as well as the morphological characteristics of clay minerals from different regions of the Mexican Republic. (Author)

  11. Molecular-nuclear transitions

    International Nuclear Information System (INIS)

    Belyaev, V.B.; Miller, M.B.

    2007-01-01

    Full text: The spectra in some light nuclei have one interesting property. For example, in the closed vicinity of some resonance states of such nuclei as 5 He, 8 Be, 18 F, 18 Ne the thresholds exist for two- or three-body decay of those nuclei. Let us consider the lightest of the above nuclei, 5 He. The energy threshold for 5 He > d+t decay is ∼50 keV lower than the energy of 3/2 + state of 5 He nucleus. However, due to a rather large width of this state, ∼70 keV, the nuclear capture of deuterons by tritons in dtm-molecule is highly enhanced in comparison with the process of dd capture in the ddm molecule. The physical reason for the enhancement of the probability of the capture into the resonant state can be associated with a long tail of wave function of the resonant state and, accordingly, with the large value of the overlap integral determining in general the probability of the transition between two systems. Thus, one can expect the enhancement of the molecular-nuclear transitions, and this was indeed observed experimentally for the case of dtm molecule. Now, let us consider some other molecular-nuclear combinations: 18 Ne - H 2 O, 18 F - 17 OH, and 8 Be - 6 LiD molecule. With the high accuracy the energies of the above molecular systems coincide with the energies of the resonant states in the appropriate nuclei. Due to the uncertainty in the experimental nuclear data it is not known at present whether the energies of these thresholds are lower or higher of the corresponding energies of the nuclear resonances. Let us assume that the molecular energy is few keV over the energy of the nuclear resonance. Then, we will deal with a very interesting phenomenon: the molecular-nuclear complex constitutes a two level system, which in some sense is analogous to the two-level atomic system, as in a laser. The crucial difference between this one and the two-level atomic systems consists in a fact that in the molecular-nuclear case no special procedure of pumping up

  12. Molecular imaging in oncology

    International Nuclear Information System (INIS)

    Weber, W.A.

    2007-01-01

    Molecular imaging is generally defined as noninvasive and quantitative imaging of targeted macromolecules and biological processes in living organisms. A characteristic of molecular imaging is the ability to perform repeated studies and assess changes in biological processes over time. Thus molecular imaging lends itself well for monitoring the effectiveness of tumor therapy. In animal models a variety of techniques can be used for molecular imaging. These include optical imaging (bioluminescence and fluorescence imaging), magnetic resonance imaging (MRI) and nuclear medicine techniques. In the clinical setting, however, nuclear medicine techniques predominate, because so far only radioactive tracers provide the necessary sensitivity to study expression and function of macromolecules non-invasively in patients. Nuclear medicine techniques allows to study a variety of biological processes in patients. These include the expression of various receptors (estrogen, androgen, somatostatin receptors and integrins). In addition, tracers are available to study tumor cell proliferation and hypoxia. The by far most commonly used molecular imaging technique in oncology is, however, positron emission tomography (PET) with the glucose analog [ 18 F]fluorodeoxyglucose (FDG-PET). FDG-PET permits non-invasive quantitative assessment of the accelerated exogenous glucose use of malignant tumors. Numerous studies have now shown that reduction of tumor FDG-uptake during therapy allows early prediction of tumor response and patient survival. Clinical studies are currently underway to determine whether FDG-PET can be used to individualize tumor therapy by signaling early in the course of therapy the need for therapeutic adjustments in patients with likely non-responding tumors. (orig.)

  13. Analyse de régression quantile de la relation entre la langue et l’intervalle entre les grossesses au Québec (Canada

    Directory of Open Access Journals (Sweden)

    Nathalie Auger

    2018-01-01

    Full Text Available Introduction. On sait que les intervalles courts comme les intervalles longs entre les grossesses sont associés à des issues périnatales défavorables, comme des fausses couches et des accouchements prématurés, mais les différences culturelles à ce sujet sont mal connues. Repérer les inégalités culturelles dans les intervalles entre les grossesses est nécessaire afin d'améliorer les résultats relatifs à la santé de la mère et de l’enfant. Nous avons ainsi évalué les intervalles entre les grossesses chez les anglophones et les francophones du Québec. Méthodologie. Nous avons obtenu les dossiers de naissance de tous les enfants nés au Québec entre 1989 et 2011. Nous avons recensé 571 461 femmes ayant eu au moins deux naissances et déterminé l’intervalle entre leurs grossesses. Les intervalles courts entre les grossesses (moins de 18 mois ont été définis comme étant le 20e percentile de la distribution, et les intervalles longs (60 mois ou plus, comme le 80e percentile. À l’aide de régressions quantiles, nous avons évalué l’association entre la langue et les intervalles courts et longs, ajustés en fonction des caractéristiques de la mère. Nous avons évalué les différences au fil du temps et selon l’âge de la mère pour les groupes défavorisés, qui ont été définis par l’absence de diplôme d’études secondaires, la résidence en milieu rural et le fait de vivre dans un quartier défavorisé matériellement. Résultats. Dans les modèles de régression ajustés, les anglophones sans diplôme d’études secondaires avaient des intervalles plus courts de 1,0 mois (intervalle de confiance [IC] à 95 % : −1,5 à −0,4 par rapport à leurs homologues francophones au 20e percentile de la distribution et plus longs de 1,9 mois (−0,5 à 4,3 au 80e percentile. Les résultats étaient similaires pour les anglophones des régions rurales et des quartiers matériellement défavorisés. Les

  14. RELACIÓN ENTRE DIFERENTES PRUEBAS DE CAMPO: FUERZA, POTENCIA Y VELOCIDAD

    Directory of Open Access Journals (Sweden)

    Jessenia Hernández Elizondo

    2003-12-01

    Full Text Available Esta investigación tuvo como propósito principal el encontrar por medio de pruebas en las variables de fuerza, potencia y velocidad, la relación matemática existente entre estos tres constructos. Participaron 56 sujetos varones con edades entre 18 y 25 años. Con el fin de responder al objetivo del estudio, se les aplicaron pruebas de campo de fuerza (1RM de sentadilla completa y repeticiones máximas al 80% 60% 40% y 20%, de velocidad (30 metros lanzados y 30 metros sin impulso, y de potencia (salto vertical con contra-movimiento SVCM, salto vertical sin impulso SVSI y salto vertical con caída SVCC, para correlacionar las diferentes pruebas entre sí. Los datos fueron analizados por medio de la correlación de Pearson (r, para correlacionar parejas de pruebas y correlación canónica (Rc para correlacionar grupos de variables. A partir de cada correlación se obtuvo la varianza explicada (r2 la cual indica el porcentaje de relación compartida en escala de 0-100 que existe entre las pruebas. Según los datos obtenidos, no existe relación significativa (2.1% entre las pruebas de salto-sentadilla, ni relación significativa (5.1% entre las pruebas de velocidad- sentadilla, mientras que la relación salto- velocidad (62%, fue estadísticamente significativa (p < 0.05. La implicación de estos resultados podrían respaldar la idea de que la relación teórica que existe entre estos constructos, no es completamente cierta cuando éstos son medidos por medio de pruebas de campo.

  15. Conformation analysis of trehalose. Molecular dynamics simulation and molecular mechanics

    International Nuclear Information System (INIS)

    Donnamaira, M.C.; Howard, E.I.; Grigera, J.R.

    1992-09-01

    Conformational analysis of the disaccharide trehalose is done by molecular dynamics and molecular mechanics. In spite of the different force fields used in each case, comparison between the molecular dynamics trajectories of the torsional angles of glycosidic linkage and energy conformational map shows a good agreement between both methods. By molecular dynamics it is observed a moderate mobility of the glycosidic linkage. The demands of computer time is comparable in both cases. (author). 6 refs, 4 figs

  16. DIVERSIDAD GENÉTICA ENTRE SUBPOBLACIONES RACIALES BOVINAS DE COSTA RICA

    Directory of Open Access Journals (Sweden)

    Marco Martínez

    2015-01-01

    Full Text Available El objetivo del estudio fue cuantificar la diversidad genética entre 16 subpoblaciones raciales bovinas de Costa Rica, con base en 1412 muestras de ADN bovino de todo el país, evaluadas mediante 18 marcadores microsatélites. El número promedio de alelos (Na por locus dentro de raza fue de 10,3, que varían entre 8 (Holstein×Jersey y 13 (Criolla para doble propósito. El número promedio de alelos efectivo (Ne fue de 5,04, con cambios entre 4,18 (Jersey y 5,64 (Bos taurus×Bos indicus. La heterocigosidad observada promedio fue de 0,77, variando entre 0,73 (Jersey y 0,81 (Bos taurus×Bos indicus. La heterocigosidad esperada (He promedio fue de 0,78, que oscilan entre 0,74 (Jersey y Holstein×Jersey y 0,81 (Bos taurus×Bos indicus, Criolla para doble propósito y Cruces para doble propósito. El contenido de información polimórfica (PIC fue de 0,76, con variaciones entre 0,71 (Jersey y Holstein×Jersey y 0,79 (Criollas para doble propósito y Cruces para doble propósito. El FIS promedio fue de 0,02, con oscilaciones entre -0,03 (Holstein×Jersey a 0,04 (Brahman, Criolla para carne y Cruces para leche. La desviación del equilibrio Hardy Weinberg no fue significativa (p>0,05 en la mayoría de los loci para las subpoblaciones raciales. El subgrupo con mayor número de loci en desequilibrio fue Jersey (8 loci, mientras que los subgrupos Bos taurus×Bos indicus, Criolla para leche y Holstein×Jersey presentaron solo 1 locus en desequilibrio. Los índices de fijación FIS (0,02, FIT (0,05 y FST (0,03 indicaron cierta tendencia hacia la homocigosidad. Los dendrogramas mostraron 3 agrupaciones raciales claramente diferenciadas que coinciden con las razas de origen Bos taurus, Bos indicus y sus respectivos cruces. Los resultados del análisis indicaron que el número de microsatélites empleados sí permitió establecer una discriminación clara a nivel de las frecuencias alélicas y en la distribución del tamaño de los alelos entre las

  17. Aborto entre alunas e funcionárias de uma universidade brasileira

    Directory of Open Access Journals (Sweden)

    Hardy Ellen

    1993-01-01

    Full Text Available No Brasil existem poucas informações sobre o aborto provocado e suas características na população. A dificuldade em se obter dados confiáveis deve-se: à sua ilegalidade, e também ao fato de que a maioria dos estudos é realizada em hospitais. Assim, em 1990, foi realizada pesquisa entre alunas da graduação e funcionárias de uma universidade brasileira. Os dados foram obtidos por meio de questionário, auto-respondido, para devolução por correio, anonimamente. Os resultados apresentados referem-se à freqüência do aborto provocado nesta população. Encontrou-se que quatro vezes menos alunas do que funcionárias tinham engravidado alguma vez (15% e 65%; 9% das alunas e 14% das funcionárias tiveram aborto provocado. Entre as mulheres que engravidaram alguma vez, as alunas tiveram mais aborto provocado do que as funcionárias (59% e 20%. Quando controladas por grupo etário as diferenças entre as alunas e funcionárias mantiveram-se. Entretanto, entre as alunas, o aborto provocado foi mais freqüente entre as mais jovens.

  18. PENGARUH PANJANG ENTRES TERHADAP KEBERHASILAN PENYAMBUNGAN TANAMAN ALPUKAT (PERSEA AMERICANA MILL.

    Directory of Open Access Journals (Sweden)

    Dirgahani Putri

    2016-06-01

    Full Text Available Beragamnya hasil produksi dan kualitas buah alpukat dapat diperbaiki dengan metode penyambungan. Penyambungan merupakan kegiatan untuk mengga-bungkan dua atau lebih sifat unggul dalam satu tanaman. Penelitian ini bertujuan mengetahui pengaruh berbagai panjang entres terhadap keberhasilan penyam-bungan tanaman alpukat. Rancangan percobaan yang digunakan dalam penelitian ini adalah Rancangan Acak Kelompok dengan lima perlakuan panjang entres, yaitu 3 cm, 6 cm, 9 cm, 12 cm, dan 15 cm.Setiap perlakuan diulang sebanyak lima kali dan setiap perlakuan terdiri atas lima tanaman;sehingga jumlah totalnya sebanyak 125 tanaman. Pengamatan dilakukan pada peubah persentase sambung hidup, jumlah tunas, panjang tunas, jumlah daun, dan diameter batang atas. Berbagai panjang entres tidak memberikan pengaruh yang nyata pada peubah persentase sambung hidup, panjang tunas terpanjang, jumlah daun, dan diameter batang atas tetapi berpengaruh nyata pada peubah jumlah tunas. Perlakuan panjang entres 15 cm memberikan hasil tertinggi untuk jumlah tunas, panjang tunas, jumlah daun dan diameter batang atas, sedangkan untuk persentase hidup perlakuan 6 cm, 12 cm memberikan hasil tertinggi yaitu 100%. Perlakuan panjang entres 3 cm adalah perlakuan yang memberikan pengaruh yang rendah pada persentase sambung hidup (yaitu 92%, peubah jumlah tunas, panjang tunas, serta diameter batang atas pada berbagai umur tanaman alpukat.

  19. TINGKAT HIDUP DAN PERTUMBUHAN AVOKAD HASIL SAMBUNG PUCUK ENTRES YANG DISIMPAN DALAM PELEPAH BATANG PISANG

    Directory of Open Access Journals (Sweden)

    Lazarus Agus Sukamto

    2014-01-01

    Full Text Available Buah avokad mempunyai kandungan nutrisi yang sangat baik bagi masyarakat khususnya kandungan lemak tidak jenuh dan protein yang tertinggi bila dibandingkan jenis buah lain. Untuk tujuan komersial, tanaman avokad perlu diperbanyak secara vegetatif untuk memperoleh bibit yang telah terbukti kualitas dan kuantitas tinggi, serta berbuah lebih awal. Keberhasilan penyambungan sangat dipengaruhi oleh kesegaran entres. Penelitian ini bertujuan untuk mengetahui keberhasilan dan pertumbuhan sambungan tanaman avokad dengan menggunakan entres yang disimpan dalam pelepah batang pisang selama dua hingga sembilan hari. Parameter pengamatan meliputi persentase tingkat hidup sambungan, pertumbuhan panjang, jumlah daun, jumlah cabang, dan panjang percabangan batang atas setiap bulan sampai enam bulan. Data pertumbuhan dianalisis secara statistik dengan ANOVA dan uji lanjut Duncan. Lama penyimpanan entres berpengaruh terhadap tingkat hidup hasil sambungan dan pertumbuhan batang atas avokad. Rerata tingkat hidup bibit sambungan avokad terus menurun dari 99,5% pada umur satu bulan sampai 71% pada umur enam bulan setelah penyambungan, tetapi tidak mengalami penurunan setelah lima bulan penyambungan. Penyimpanan entres avokad dalam pelepah pisang dapat dipertahankan kesegarannya selama sembilan hari, yaitu tingkat hidup sambungan 60% - 84% enam bulan setelah penyambungan. Ada kecenderungan bahwa makin lama penyimpanan entres, makin menurun pertumbuhan batang atas avokad; sebaliknya makin lama umur penyambungan, makin meningkat pertumbuhan batang atas avokad, kecuali jumlah cabangnya yang relatif tidak meningkat setelah dua bulan penyambungan.

  20. Topology in Molecular Biology

    CERN Document Server

    Monastyrsky, Michail Ilych

    2007-01-01

    The book presents a class of new results in molecular biology for which topological methods and ideas are important. These include: the large-scale conformation properties of DNA; computational methods (Monte Carlo) allowing the simulation of large-scale properties of DNA; the tangle model of DNA recombination and other applications of Knot theory; dynamics of supercoiled DNA and biocatalitic properties of DNA; the structure of proteins; and other very recent problems in molecular biology. The text also provides a short course of modern topology intended for the broad audience of biologists and physicists. The authors are renowned specialists in their fields and some of the new results presented here are documented for the first time in monographic form.

  1. Molecular and Cellular Signaling

    CERN Document Server

    Beckerman, Martin

    2005-01-01

    A small number of signaling pathways, no more than a dozen or so, form a control layer that is responsible for all signaling in and between cells of the human body. The signaling proteins belonging to the control layer determine what kinds of cells are made during development and how they function during adult life. Malfunctions in the proteins belonging to the control layer are responsible for a host of human diseases ranging from neurological disorders to cancers. Most drugs target components in the control layer, and difficulties in drug design are intimately related to the architecture of the control layer. Molecular and Cellular Signaling provides an introduction to molecular and cellular signaling in biological systems with an emphasis on the underlying physical principles. The text is aimed at upper-level undergraduates, graduate students and individuals in medicine and pharmacology interested in broadening their understanding of how cells regulate and coordinate their core activities and how diseases ...

  2. Activating the molecular spinterface

    Science.gov (United States)

    Cinchetti, Mirko; Dediu, V. Alek; Hueso, Luis E.

    2017-05-01

    The miniaturization trend in the semiconductor industry has led to the understanding that interfacial properties are crucial for device behaviour. Spintronics has not been alien to this trend, and phenomena such as preferential spin tunnelling, the spin-to-charge conversion due to the Rashba-Edelstein effect and the spin-momentum locking at the surface of topological insulators have arisen mainly from emergent interfacial properties, rather than the bulk of the constituent materials. In this Perspective we explore inorganic/molecular interfaces by looking closely at both sides of the interface. We describe recent developments and discuss the interface as an ideal platform for creating new spin effects. Finally, we outline possible technologies that can be generated thanks to the unique active tunability of molecular spinterfaces.

  3. Measuring Dark Molecular Gas

    Science.gov (United States)

    Li, Di; Heiles, Carl E.

    2017-01-01

    It is now well known that a substantial fraction of Galactic molecular gas cannot be traced by CO emission. The thus dubbed CO dark molecular gas (DMG) occupy a large volume of ISM with intermediate extinction, where CO is either not self-shielded and/or subthermally excited. We explore the utilities of simple hydrides, such OH, CH, etc., in tracing DMG. We mapped and modeled the transition zone cross a cloud boundary and derived emperical OH abundance and DMG distribution formulae. We also obtained absorption measurements of various species using Arecibo, VLA, ATCA, and ALMA. The absorption technique has the potential to provide systematic quantification of DMG in the next few years.

  4. Molecular-beam scattering

    International Nuclear Information System (INIS)

    Vernon, M.F.

    1983-07-01

    The molecular-beam technique has been used in three different experimental arrangements to study a wide range of inter-atomic and molecular forces. Chapter 1 reports results of a low-energy (0.2 kcal/mole) elastic-scattering study of the He-Ar pair potential. The purpose of the study was to accurately characterize the shape of the potential in the well region, by scattering slow He atoms produced by expanding a mixture of He in N 2 from a cooled nozzle. Chapter 2 contains measurements of the vibrational predissociation spectra and product translational energy for clusters of water, benzene, and ammonia. The experiments show that most of the product energy remains in the internal molecular motions. Chapter 3 presents measurements of the reaction Na + HCl → NaCl + H at collision energies of 5.38 and 19.4 kcal/mole. This is the first study to resolve both scattering angle and velocity for the reaction of a short lived (16 nsec) electronic excited state. Descriptions are given of computer programs written to analyze molecular-beam expansions to extract information characterizing their velocity distributions, and to calculate accurate laboratory elastic-scattering differential cross sections accounting for the finite apparatus resolution. Experimental results which attempted to determine the efficiency of optically pumping the Li(2 2 P/sub 3/2/) and Na(3 2 P/sub 3/2/) excited states are given. A simple three-level model for predicting the steady-state fraction of atoms in the excited state is included

  5. Molecular Mechanisms of Preeclampsia

    OpenAIRE

    N. Vitoratos; D. Hassiakos; C. Iavazzo

    2012-01-01

    Preeclampsia is a pregnancy-specific disease characterized by new onset hypertension and proteinuria after 20 wk of gestation. It is a leading cause of maternal and fetal morbidity and mortality worldwide. Exciting discoveries in the last decade have contributed to a better understanding of the molecular basis of this disease. Epidemiological, experimental, and therapeutic studies from several laboratories have provided compelling evidence that an antiangiogenic state owing to alterations in ...

  6. Molecular diagnostics of periodontitis

    OpenAIRE

    Izabela Korona-Głowniak; Radosław Siwiec; Marcin Berger; Anna Malm; Jolanta Szymańska

    2017-01-01

    The microorganisms that form dental plaque are the main cause of periodontitis. Their identification and the understanding of the complex relationships and interactions that involve these microorganisms, environmental factors and the host’s health status enable improvement in diagnostics and targeted therapy in patients with periodontitis. To this end, molecular diagnostics techniques (both techniques based on the polymerase chain reaction and those involving nucleic acid analysis via hybridi...

  7. Molecular diagnostics in endodontics

    OpenAIRE

    Rechenberg, Dan-Krister; Zehnder, Matthias

    2014-01-01

    Recent systematic reviews have substantiated the fact that current testing methods to assess the inflammatory state of the pulp and the periapical tissues are of limited value. Consequently, it may be time to search for alternative routes in endodontic diagnostics. Molecular assessment methods could be the future. However, in the field of endodontics, the research in that direction is only about to evolve. Because pulpal and periradicular diseases are related to opportunistic infections, diag...

  8. Molecular Diagnostics of ?-Thalassemia

    OpenAIRE

    Atanasovska, B; Bozhinovski, G; Chakalova, L; Kocheva, S; Karanfilski, O; Plaseska-Karanfiska, D

    2012-01-01

    A high-quality hemoglobinopathy diagnosis is based on the results of a number of tests including assays for molecular identification of causative mutations. We describe the current diagnostic strategy for the identification of ?-thalassemias and hemoglobin (Hb) variants at the International Reference Laboratory for Haemoglobinopathies, Research Centre for Genetic Engineering and Biotechnology (RCGEB) ?Georgi D. Efremov,? Skopje, Republic of Macedonia. Our overall approach and most of the meth...

  9. Molecular biomethods handbook

    National Research Council Canada - National Science Library

    Walker, John M; Rapley, Ralph

    2008-01-01

    ... the reader to a selection of analytical and preparative techniques that we considered to be frequently used by research workers in the field of molecular biology. Clearly, within the constraints of a single volume we had to be selective in the techniques we described. Since the first edition was published, science has continued to move on apace. For example, the use of microarray technology is now commonplace, nanotechnology has entered the scientific literature, microfluidic technology has be...

  10. Molecular Vaccines for Malaria

    Science.gov (United States)

    2010-01-01

    Removing inhibitory plasm ids from the cock- with the radiation-attenuated sporozoite (RAS) vaccine36•37 (see tail restored the immunogenicity of the...relative increased in vitro growth inhibitory activity against homologous to the P. folciparum antigen expressing plasm ids alone, and none parasites...25nm and have a molecular weight of 14.8 kDa. (C) Transmission electron microscopy image of P4c-Mal nanoparticles at 242 OOOx. The sample was

  11. Designing the molecular future

    OpenAIRE

    Schneider Gisbert

    2011-01-01

    Approximately 25 years ago the first computer applications were conceived for the purpose of automated 'de novo' drug design prominent pioneering tools being ALADDIN CAVEAT GENOA and DYLOMMS. Many of these early concepts were enabled by innovative techniques for ligand receptor interaction modeling like GRID MCSS DOCK and CoMFA which still provide the theoretical framework for several more recently developed molecular design algorithms. After a first wave of software tools and groundbreaking ...

  12. Atomic and molecular theory

    International Nuclear Information System (INIS)

    Inokuti, Mitio.

    1990-01-01

    The multifaceted role of theoretical physics in understanding the earliest stages of radiation action is discussed. Scientific topics chosen for the present discourse include photoabsorption, electron collisions, and ionic collisions, and electron transport theory, Connections of atomic and molecular physics with condensed-matter physics are also discussed. The present article includes some historical perspective and an outlook for the future. 114 refs., 3 figs

  13. Molecular ecological network analyses.

    Science.gov (United States)

    Deng, Ye; Jiang, Yi-Huei; Yang, Yunfeng; He, Zhili; Luo, Feng; Zhou, Jizhong

    2012-05-30

    Understanding the interaction among different species within a community and their responses to environmental changes is a central goal in ecology. However, defining the network structure in a microbial community is very challenging due to their extremely high diversity and as-yet uncultivated status. Although recent advance of metagenomic technologies, such as high throughout sequencing and functional gene arrays, provide revolutionary tools for analyzing microbial community structure, it is still difficult to examine network interactions in a microbial community based on high-throughput metagenomics data. Here, we describe a novel mathematical and bioinformatics framework to construct ecological association networks named molecular ecological networks (MENs) through Random Matrix Theory (RMT)-based methods. Compared to other network construction methods, this approach is remarkable in that the network is automatically defined and robust to noise, thus providing excellent solutions to several common issues associated with high-throughput metagenomics data. We applied it to determine the network structure of microbial communities subjected to long-term experimental warming based on pyrosequencing data of 16 S rRNA genes. We showed that the constructed MENs under both warming and unwarming conditions exhibited topological features of scale free, small world and modularity, which were consistent with previously described molecular ecological networks. Eigengene analysis indicated that the eigengenes represented the module profiles relatively well. In consistency with many other studies, several major environmental traits including temperature and soil pH were found to be important in determining network interactions in the microbial communities examined. To facilitate its application by the scientific community, all these methods and statistical tools have been integrated into a comprehensive Molecular Ecological Network Analysis Pipeline (MENAP), which is open

  14. Molecular Gastronomy in Spain

    OpenAIRE

    García-Segovia, Purificación; Garrido, María Dolores; Vercet Tormo, Antonio; Arboleya, Juan Carlos; FISZMAN DAL SANTO, SUSANA; Martínez Monzó, Javier; Laguarda, Sergio; Palacios, Victor; Ruiz Carrascal, Jorge

    2014-01-01

    [EN] Beyond the overwhelming international success of Ferrán Adria, Spain has been one of the countries with a more active implication in molecular gastronomy as a scientific discipline but also in the use of ingredients, technologies, and equipment from the scientificand technological universe in the culinary area. Nowadays, this is a well-established discipline in Spain, with a number of research groups covering related topics, several companies commercializing appliances and additives worl...

  15. Communication: Molecular gears

    Energy Technology Data Exchange (ETDEWEB)

    Burnell, E. Elliott, E-mail: elliott.burnell@ubc.ca [Chemistry Department, University of British Columbia, 2036 Main Mall, Vancouver, British Columbia V6T 1Z1 (Canada); Lange, Cornelis A. de, E-mail: c.a.de.lange@vu.nl [Atomic, Molecular and Laser Physics, Vrije Universiteit, De Boelelaan 1081, 1081 HV Amsterdam (Netherlands); Meerts, W. Leo, E-mail: leo.meerts@science.ru.nl [Atomic, Molecular and Laser Physics, Vrije Universiteit, De Boelelaan 1081, 1081 HV Amsterdam (Netherlands); Institute for Molecules and Materials, Radboud University Nijmegen, Heyendaalseweg 135, NL-6525 AJ Nijmegen (Netherlands)

    2016-09-07

    The {sup 1}H nuclear magnetic resonance spectrum of hexamethylbenzene orientationally ordered in the nematic liquid crystal ZLI-1132 is analysed using covariance matrix adaptation evolution strategy. The spectrum contains over 350 000 lines with many overlapping transitions, from which four independent direct dipolar couplings are obtained. The rotations of the six methyl groups appear to be correlated due to mutual steric hindrance. Adjacent methyl groups show counter-rotating or geared motion. Hexamethylbenzene thus behaves as a molecular hexagonal gear.

  16. Atomic and molecular theory

    Energy Technology Data Exchange (ETDEWEB)

    Inokuti, Mitio.

    1990-01-01

    The multifaceted role of theoretical physics in understanding the earliest stages of radiation action is discussed. Scientific topics chosen for the present discourse include photoabsorption, electron collisions, and ionic collisions, and electron transport theory, Connections of atomic and molecular physics with condensed-matter physics are also discussed. The present article includes some historical perspective and an outlook for the future. 114 refs., 3 figs.

  17. Molecular basis of alcoholism.

    Science.gov (United States)

    Most, Dana; Ferguson, Laura; Harris, R Adron

    2014-01-01

    Acute alcohol intoxication causes cellular changes in the brain that last for hours, while chronic alcohol use induces widespread neuroadaptations in the nervous system that can last a lifetime. Chronic alcohol use and the progression into dependence involve the remodeling of synapses caused by changes in gene expression produced by alcohol. The progression of alcohol use, abuse, and dependence can be divided into stages, which include intoxication, withdrawal, and craving. Each stage is associated with specific changes in gene expression, cellular function, brain circuits, and ultimately behavior. What are the molecular mechanisms underlying the transition from recreational use (acute) to dependence (chronic)? What cellular adaptations result in drug memory retention, leading to the persistence of addictive behaviors, even after prolonged drug abstinence? Research into the neurobiology of alcoholism aims to answer these questions. This chapter will describe the molecular adaptations caused by alcohol use and dependence, and will outline key neurochemical participants in alcoholism at the molecular level, which are also potential targets for therapy. © 2014 Elsevier B.V. All rights reserved.

  18. Molecular symmetry and spectroscopy

    CERN Document Server

    Bunker, Philip; Jensen, Per

    2006-01-01

    The first edition, by P.R. Bunker, published in 1979, remains the sole textbook that explains the use of the molecular symmetry group in understanding high resolution molecular spectra. Since 1979 there has been considerable progress in the field and a second edition is required; the original author has been joined in its writing by Per Jensen. The Material of the first edition has been reorganized and much has been added. The molecular symmetry group is now introduced early on, and the explanation of how to determine nuclear spin statistical weights has been consolidated in one chapter, after groups, symmetry groups, character tables and the Hamiltonian have been introduced. A description of the symmetry in the three-dimensional rotation group K(spatial), irreducible spherical tensor operators, and vector coupling coefficients is now included. The chapters on energy levels and selection rules contain a great deal of material that was not in the first edition (much of it was undiscovered in 1979), concerning ...

  19. Molecular markers in glioma.

    Science.gov (United States)

    Ludwig, Kirsten; Kornblum, Harley I

    2017-09-01

    Gliomas are the most malignant and aggressive form of brain tumors, and account for the majority of brain cancer related deaths. Malignant gliomas, including glioblastoma are treated with radiation and temozolomide, with only a minor benefit in survival time. A number of advances have been made in understanding glioma biology, including the discovery of cancer stem cells, termed glioma stem cells (GSC). Some of these advances include the delineation of molecular heterogeneity both between tumors from different patients as well as within tumors from the same patient. Such research highlights the importance of identifying and validating molecular markers in glioma. This review, intended as a practical resource for both clinical and basic investigators, summarizes some of the more well-known molecular markers (MGMT, 1p/19q, IDH, EGFR, p53, PI3K, Rb, and RAF), discusses how they are identified, and what, if any, clinical relevance they may have, in addition to discussing some of the specific biology for these markers. Additionally, we discuss identification methods for studying putative GSC's (CD133, CD15, A2B5, nestin, ALDH1, proteasome activity, ABC transporters, and label-retention). While much research has been done on these markers, there is still a significant amount that we do not yet understand, which may account for some conflicting reports in the literature. Furthermore, it is unlikely that the investigator will be able to utilize one single marker to prospectively identify and isolate GSC from all, or possibly, any gliomas.

  20. Prioridades y desafíos en la cooperación ambiental entre Europa y América Latina: entre gobernanza global y sustentabilidad local

    Directory of Open Access Journals (Sweden)

    Imme Scholz

    2014-06-01

    Full Text Available La cooperación para el desarrollo está pasando por un proceso de redefinición de prioridades debido a los avances de la globalización económica, el cambio climático y los nuevos problemas de seguridad internacional. Este nuevo contexto no deja de influir las relaciones de cooperación entre Europa y América Latina.

  1. Diversidade genética estimada com marcadores entre sequências simples repetidas em cultivos comerciais de Cupuaçuzeiro

    Directory of Open Access Journals (Sweden)

    Bruna Mezzalira da Silva

    2016-01-01

    Full Text Available RESUMO: Quinze primers ISSR (entre sequências simples repetidas foram utilizados para avaliar a diversidade genética entre e dentro de pomares comerciais de Theobroma grandiflorum (Willd. ex Spreng. K. Schum. Para isso, foram analisados sessenta indivíduos, distribuídos nos três cultivos. Um total de 102 bandas foi amplificado, com uma porcentagem de 52,0% de polimorfismo em nível de espécie e média de 6,8 alelos por primer ISSR. A média do Índice de Conteúdo Polimórfico (PIC foi de 0,55. Em relação aos índices de diversidade gênica de Nei (H e de Shannon (I, os cultivos analisados apresentaram os valores: SAR H = 0,114 e I = 0,177; SSL H = 0,108 e I = 0,162 e SEC H = 0,104 e I = 0,156, considerados valores de moderados a baixos. A AMOVA revelou 34,91% da variância total entre os cultivos e 65,09% dentro deles. Os marcadores moleculares ISSR revelaram que há diversidade genética dentro de cada cultivo comercial estudado, portanto é possível selecionar genótipos superiores que poderão ser utilizados para originar cultivos mais uniformes. Esse resultado tem sido considerado de grande relevância, por fornecer ferramentas para a implementação de programas de melhoramento e delineamento de estratégias de conservação ex situ e in situ.

  2. Cooperación; altruismo en las relaciones entre aerolíneas

    OpenAIRE

    Fernández Lerate, Elisa M.

    2016-01-01

    El presente estudio se centra en analizar unas determinadas relaciones cooperativas entre compañías aéreas, con la intención de investigar si sacan provecho o no de dichas relaciones. La cooperación entre esas compañías aéreas puede presentar comportamientos más altruistas o más oportunistas. Para centrar el tema del estudio, se van a analizar los acuerdos de códigos compartidos que llevan a cabo entre ellas. Los datos de cooperación a través de código compartido permitirán conocer qué porcen...

  3. Interactions entre muqueuse orale, salive et molécules de la flaveur

    OpenAIRE

    Ployon, Sarah

    2016-01-01

    Le rôle de la salive dans la perception sensorielle est de plus en plus reconnu, notamment par le biais des interactions physico-chimiques pouvant s’établir entre protéines salivaires et constituants alimentaires. Ce travail s’intéresse à la pellicule salivaire, la couche de protéines salivaires ancrées aux cellules épithéliales, et vise à caractériser les interactions pouvant s’établir d’une part entre ces protéines et épithélium oral, et d‘autre part entre ces protéines et les molécules de ...

  4. Entre a potência e o poder: Walter Benjamin e Roger Caillois

    Directory of Open Access Journals (Sweden)

    Susana Scramim

    2009-01-01

    Full Text Available http://dx.doi.org/10.5007/1984-784X.2009v9n14p101 A escrita fragmentária empenhada por Benjamim em "Seqüência em Ibiza" e os aforismos do Oráculo Manual y Arte de Prudencia de Gracián  indicam o esboço de uma reflexão sobre o poder na obra de Benjamin a qual se materializará como limiar entre a forma e o informe, entre a autonomia e auto-implicação, entre a obra e a des-obra. Essa reflexão se torna aguda  no impacto provocado em Benjamin pela a leitura  de L´ariditè que Roger Caillois publica juntamente com outros ensaios, em 1938, no Colégio de Sociologia em Paris.

  5. Comparación de caracteres corporales y del veneno de Bothrops alternatus entre poblaciones de las provincias de Buenos Aires y Entre Ríos, Argentina

    Directory of Open Access Journals (Sweden)

    Rocco, Daniela Marisa

    2011-11-01

    Full Text Available Comparamos caracteres corporales y producción de veneno de ejemplares de Bothrops alternatus de una población aislada geográficamente (Olavarría, región de Tandilia, Buenos Aires con otra en su área de distribución continua de Concordia (Entre Ríos. Estudiamos el largo corporal, peso, separación entre dientes inoculadores, cantidad de veneno y de proteínas en el veneno por ejemplar. No se hallaron diferencias en los caracteres estudiados entre ambas poblaciones (p > 0.05. Las hembras fueron mayores que los machos en ambas muestras, entre un 12-18% (p 0.5; Olavarría: 142 ± 65 mg/animal, Concordia: 160 ± 80 mg/animal, aún ajustando la cantidad de veneno producida respecto al tamaño, mediante el cociente veneno/largo corporal (p >0.6. Tampoco hubo diferencias en el contenido proteico, siendo para ambas muestras de 0.697 ± 0.096 mg de proteínas/mg de veneno seco. Nuestros datos sugieren que los ejemplares de la población aislada de Tandilia no presentan variaciones en el tamaño corporal o en la cantidad de veneno producida, respecto a los ejemplares de Concordia. Some corporal characters and venom yield of adult specimens of Bothrops alternatus from the isolated region of Olavarría (Tandilian Region, Buenos Aires and the region of continuous distribution of Concordia (Entre Ríos were compared. Corporal length, weight, separation between fangs, venom yield by snake and the amount of protein in the venom were determined. No differences in the distinct characters from specimens from both regions were found (p > 0.05. Females were greater than males in both samples, 12-18% (p 0.5; Olavarría= 142 ± 65 mg / animal, Concordia= 161 ± 80 mg / animal even adjusting the venom yield with the corporal length by the relation mg of venom / corporal length (p > 0.6. No differences were observed in the protein content of the dry venom which was of 0.697 ± 0.096 mg of protein / mg of dry venom. From the study of these samples, it could be

  6. Genetic similarity between coriander genotypes using ISSR markers Similaridade genética entre genótipos de coentro por marcadores ISSR

    Directory of Open Access Journals (Sweden)

    Roberto de A Melo

    2011-12-01

    trabalhos de estimativas de similaridade genética. Portanto, este trabalho teve como objetivo avaliar a similaridade genética entre dez genótipos de coentro (nove cultivares e uma linhagem por meio de marcadores ISSR. As cultivares utilizadas foram Americano, Asteca, Palmeira, Português, Santo, Supéria, Tabocas, Tapacurá, Verdão e a linhagem experimental HTV-9299. A similaridade genética entre as cultivares foi estimada com base nos marcadores moleculares de ISSR, utilizando-se 227 regiões de bandas de ISSR. O oligonucleotídeo UBC 897 gerou o maior número de fragmentos (16, resultando em um maior polimorfismo. Os resultados indicam que os vinte e nove oligonucleotídeos escolhidos foram satisfatórios para detecção de polimorfismo. Como resultado da análise de agrupamento a partir dos dados de similaridade, verificou-se a presença de dois grupos e dois subgrupos. A similaridade calculada para os genótipos variou de 52 a 75%. A menor similaridade ficou entre Português e Verdão, com 52%. Já a maior similaridade foi obtida entre Português e Palmeira com 75%. O ISSR é eficiente na identificação de polimorfismo de DNA em coentro.

  7. Renegociação do Tratado de Itaípu entre Lugo e Lula

    OpenAIRE

    Almeida, Giordano Sousa de

    2015-01-01

    Este trabalho objetiva analisar o processo de ratificação do ajuste no Anexo C do Tratado de Itaipu, ocorrido, no Congresso Nacional brasileiro, em decorrência do acordo assinando entre o presidente brasileiro Luiz Inácio Lula da Silva e seu homólogo paraguaio Fernando Armindo Lugo de Méndez, em julho de 2009. Especificamente, procurou-se entender se haveria alguma relação especial existente entre os Governos brasileiro, chefiado pelo Partido dos Trabalhadores, e o paraguaio, chefiado por ...

  8. Relación entre habilidades de lectura de palabras y comprensión lectora

    OpenAIRE

    Vieiro, Pilar; Amboage, Isabel

    2016-01-01

    La lectura es un aprendizaje instrumental que debe ser enseñado con un método específico. En este sentido es importante conocer la interrelación entre los distintos subprocesos implicados. En este contexto el objetivo general de este estudio es analizar si existe una asociación o disociación entre las habilidades de lectura de palabras y los procesos de comprensión en alumnos de 2º ciclo de Educación Primaria y a partir de aquí analizar las implicaciones educativas de los resultad...

  9. Diferenças entre marcas nos serviços multiple-play em Portugal

    OpenAIRE

    Silva, Pedro; Moreira, António; Moutinho, Victor

    2014-01-01

    A concorrência entre operadores do mercado das telecomunicações em Portugal tem sido intensa.Os serviços multiple-play têm vindo a conquistar a preferência dos portugueses e a oferta tem vindo a aumentar ao longo dos anos. Face ao aumento da competitividade dos principais concorrentes, seria de esperar que os desempenhos das suas marcas fossem muito equilibrados. O objetivo deste artigo é o de analisar as diferenças entre as três principais marcas multiple-play em Portugal. Para tal, foi efet...

  10. La problematica de la demarcacion entre ciencia y pseudociencia y sus implicaciones en la educacion cientifica

    Science.gov (United States)

    Jimenez Tolentino, Dinorah

    2011-12-01

    En la sociedad prevalece una tendencia generalizada hacia la inclusion de creencias y practicas pseudocientificas. Esta investigacion responde a la necesidad de analizar como la proliferacion de las pseudociencias afecta la vision que tienen los estudiantes universitarios sobre las ciencias naturales. A tales efectos, la investigadora describe las concepciones epistemologicas que tienen los estudiantes sobre las ciencias y las pseudociencias e identifica los criterios de demarcacion, entre un area y otra, que se derivan de estas concepciones. De igual modo, esta identifica las creencias y practicas pseudocientificas de mayor arraigo entre los estudiantes, destacando, a su vez, la razon de ser de las mismas. Por ultimo, la investigadora analiza las implicaciones educativas de la problematica de la demarcacion entre ciencia y pseudociencia. La investigacion es de naturaleza mixta, enmarcada en los paradigmas empirico- analitico y cualitativo. El proceso investigativo se llevo a cabo mediante la administracion del cuestionario Criterios para la demarcacion entre ciencia y pseudociencia. La parte cualitativa estuvo enmarcada en el diseno de estudio de caso, recopilando informacion mediante entrevistas semiestructuradas en dos grupos focales. La poblacion de estudio estuvo constituida por estudiantes universitarios del nivel subgraduado de la Universidad Central de Bayamon. Los resultados del estudio reflejaron las concepciones erroneas de los estudiantes sobre la naturaleza de las ciencias y las pseudociencias. Con respecto a la demarcacion entre ciencia y pseudociencia, el criterio imperante entre los universitarios es el de la verificabilidad, considerando la aplicacion del metodo cientifico como el metodo para demostrar la veracidad de las teorias cientificas. Las creencias y practicas pseudocientificas no son muy frecuentes entre los universitarios. Estos atribuyen las mismas a la prevalencia de elementos supersticiosos y al engano a que es sometida la poblacion

  11. Uma Proposta de Sistema para Tradução entre Linguagens de Sinais

    OpenAIRE

    NEIVA, Davi Hirafuji

    2015-01-01

    Na sociedade contemporânea existe uma forte campanha pela acessibilidade e pela inclusão de pessoas com deficiências. No Brasil há em torno de 9 milhões de surdos que usam a Linguagem Brasileira de Sinais (LIBRAS) e enfrentam diversas barreiras de comunicação. Várias iniciativas de aplicativos móveis proveem tradução entre LIBRAS e Português, porém a comunicação entre surdos de diferentes nacionalidades permanece um desafio. Este trabalho tem como objetivo propor um sistema que permita a pess...

  12. RELACIÓN ENTRE DIFERENTES PRUEBAS DE CAMPO: FUERZA, POTENCIA Y VELOCIDAD

    OpenAIRE

    Jessenia Hernández Elizondo

    2003-01-01

    Esta investigación tuvo como propósito principal el encontrar por medio de pruebas en las variables de fuerza, potencia y velocidad, la relación matemática existente entre estos tres constructos. Participaron 56 sujetos varones con edades entre 18 y 25 años. Con el fin de responder al objetivo del estudio, se les aplicaron pruebas de campo de fuerza (1RM de sentadilla completa y repeticiones máximas al 80% 60% 40% y 20%), de velocidad (30 metros lanzados y 30 metros sin impulso), y de potenci...

  13. La cooperación internacional entre los organismos electorales de América Latina

    Directory of Open Access Journals (Sweden)

    Luis Antonio Sobrado González

    2017-07-01

    Full Text Available Ensayo sobre la relación de cooperación internacional entre los órganos electorales de los países latinoamericanos y los órganos de cooperación internacionales y regionales que contribuyen a esta cooperación horizontal. El artículo inicia con una reseña breve de los antecedentes de los procesos electorales, desarrolla seguidamente las características generales de la cooperación internacional y los órganos de cooperación que coadyuvan a estas relaciones entre los organismos electorales de la región

  14. Um mapeamento das aproximações entre Weber e Nietzsche

    Directory of Open Access Journals (Sweden)

    Leandro dos Santos

    2014-06-01

    Full Text Available Este artigo tem por objetivo um levantamento dos principais tópicos de aproximação entre a Sociologia de Max Weber (1864-1920 e a Filosofia de Friedrich W. Nietzsche (1844-1900. Para tanto, sublinharam-se os pontos mais expressivos e correntemente observados na literatura acerca das aproximações entre Weber e Nietzsche. Nesse sentido, os traços de maior afinidade foram encontrados nos seguintes temas: poder, conhecimento, modernidade e ética.

  15. Projecte d'integració entre SAP GH - SAP MM - Kàrdex

    OpenAIRE

    Perea Núñez, Yolanda

    2012-01-01

    Projecte d'integració entre dos sistemes SAP (gestió hospitalària i gestió de materials) amb un altre sistema aliè a SAP, el sistema de magatzem de medicaments Kàrdex, mitjançant comunicacions via SAP Process Integration. Proyecto de integración entre dos sistemas SAP (gestión hospitalaria y gestión de materiales) con otro sistema ajeno a SAP, el sistema de almacén de medicamentos Kardex, mediante comunicaciones vía SAP Process Integration.

  16. Interação entre vitamina A e ferro em diferentes grupos populacionais

    OpenAIRE

    Netto,Michele Pereira; Priore,Silvia Eloiza; Franceschini,Sylvia do Carmo Castro

    2007-01-01

    A interação entre ferro e vitamina A tem sido alvo de pesquisas científicas, visto que existem questões ainda pouco esclarecidas. Através de um levantamento bibliográfico, mediante consulta à base de dados Medline da National Library of Medicine, Estados Unidos da America, foram selecionadas publicações que tratavam sobre a interação entre ferro e vitamina A em seres humanos, a partir da década de 80 até o ano de 2003. As palavras chave utilizadas no levantamento bibliográfico foram "ferro", ...

  17. Cruzamiento interespecífico entre Aedes aegypti y Aedes albopictus en el laboratorio

    OpenAIRE

    Martínez López, Yanisley; Martinez Pérez, Yanet; Acosta Rodríguez, Miriam; Fuentes González, Omar

    2014-01-01

    Introducción: existen algunos estudios realizados para verificar el posible apareamiento interespecífico, pero solo algunos trabajos han obtenido resultados positivos en este fenómeno. Objetivo: probar la posibilidad de obtener huevos viables del cruce entre Aedes aegypti y Aedes albopictus. Métodos: experimentos de apareamiento recíproco entre Aedes aegypti procedentes del insectario del Departamento de Control de Vectores del Instituto de Medicina Tropical "Pedro Kourí" y una población de A...

  18. Sonolência e consumo de carboidratos entre motoristas de caminhão

    OpenAIRE

    Andressa Juliane Martins

    2013-01-01

    Introdução - Há evidências de que o aumento do consumo de carboidratos esteja associado à sonolência. Quando realizado à noite, o consumo de carboidratos parece ser um fator que afeta o desempenho no trabalho. Paradoxalmente, o trabalho noturno levaria ao aumento da ingestão de alimentos ricos em carboidratos como consequência da privação de sono. Objetivo - Verificar a existência de correlação entre a sonolência e consumo de carboidratos entre motoristas de caminhão. Métodos - Participaram d...

  19. El “consentimiento” negociado entre dos comunidades mineras mexicanas y las trasnacionales Goldcorp y Ternium

    OpenAIRE

    Blanca Ruth Santos Cordero; Eleocadio Martínez Silva

    2015-01-01

    En este artículo se busca reconstruir la dinámica de la relación entre empresas trasnacionales y comunidades rurales mexicanas, a partir de dos estudios de caso: la minera canadiense Goldcorp, en Mazapil, Zacatecas, y la italo-argentina Ternium, en San Miguel Arcángel, en Aquila, Michoacán. La hipótesis sostiene que la racionalidad de la máxima ganancia y el cálculo del riesgo están presentes en las negociaciones entabladas entre las comunidades campesinas y las corporaciones. Y, si bien e...

  20. Art. XXIV del gatt-omc: la relación entre regionalismo y multilateralismo

    OpenAIRE

    Germán A. de la Reza

    2015-01-01

    En el presente trabajo estudiamos la interacción entre el regionalismo y el multilateralismo a través del Art. XXIV del gatt-omc y en un plano más general el grado de conexión que existe entre las dinámicas regionales y las fuerzas globales tomando en consideración los factores organizacionales. Los resultados de la investigación sugieren que el multilateralismo y el regionalismo responden a intereses sistémicos relativamente autónomos, donde uno representa una alternativa secundaria a los be...

  1. Entre memoria y olvido. El tiempo de la costumbre en un conflicto medieval

    OpenAIRE

    Paola Miceli

    2009-01-01

    IntroducciónEste trabajo se enmarca en un proyecto más general que tiene por objetivo investigar la relación entre práctica judicial y las elaboraciones doctas del derecho consuetudinario en León y Castilla durante la Edad Media. La cuestión del derecho consuetudinario es un problema en el que vengo trabajando desde hace algunos años con el objetivo de cuestionar una tesis clásica entre los historiadores del derecho que consideran a la costumbre como derecho de matriz popular ligado a las prá...

  2. A floresta geométrica de Paul Claudel: fronteira entre dois mundos.

    Directory of Open Access Journals (Sweden)

    Vera Beatriz Siqueira

    Full Text Available resumo O artigo parte da análise do balé O homem e seu desejo, criado por Paul Claudel (poema plástico, Darius Milhaud (música e Audrey Parr (cenografia e figurino quando estavam no Rio de Janeiro entre 1917 e 1918. A ideia básica é pensar essa obra como parte integrante dos diálogos interculturais que fundam a modernidade global do início do século XX, investigando o papel desempenhado pela cultura e pela natureza brasileira no projeto de Claudel de articulação entre vanguarda, classicismo e primitivismo.

  3. ASOCIACIÓN ENTRE VALORES DE TRABAJO, INTERESES PROFESIONALES Y RASGOS DE PERSONALIDAD

    OpenAIRE

    Pinto, Lariana Paula; Noronha, Ana Paula Porto; Rueda, Fabián Javier Marín

    2017-01-01

    Resumen Este estudio tuvo como objetivo investigar la asociación entre intereses profesionales y valores de trabajo, y entre valores de trabajo y rasgos de personalidad. Participaron 281 universitarios, con edad media de 23.97 años, de los cursos de Administración, Psicología, Filosofía y Teología, del Estado de San Pablo, Brasil. Fueron aplicados tres instrumentos (Escala de Evaluación de los Valores de Trabajo, Cuestionario de Búsqueda Auto-Dirigida y Batería Factorial de Personalidad). Los...

  4. Relaciones entre el sueño y la adicción

    OpenAIRE

    Cañellas, Francesca; de Lecea, Luis

    2012-01-01

    La interacción entre los trastornos del sueño y el abuso de sustancias es ya conocida, pero seguramente más compleja de lo que se pensaba. Existe tanto una relación positiva entre tener un trastorno por uso de substancias y sufrir un trastorno de sueño, como viceversa. Los efectos sobre el sueño dependen de la substancia utilizada, pero se ha demostrado que tanto durante su uso como en período de abstinencia los consumidores tienen diferentes problemas de sueño y fundamentalmente un sueño más...

  5. VIOLENCIA HACIA LOS VARONES ENTRE PAREJAS JÓVENES UNIVERSITARIAS DE TIJUANA, MÉXICO

    OpenAIRE

    Teresa Fernández de Juan; Federico Antonio Martínez Aguilar; Cristian Raquel Unzueta Miranda; Érika Rojas Mariscal

    2016-01-01

    El fin de este trabajo fue analizar los alcances actuales de la violencia de pareja entre los jóvenes, incluido el maltrato hacia los varones. Se revisa específicamente el problema en el estado de Baja California (México) a través de la aplicación de una prueba, creada y validada al efecto, a una muestra de 366 jóvenes (123 hombres y 243 mujeres), estudiantes de licenciatura pertenecientes a diversas universidades privadas de la ciudad de Tijuana. Entre los resultados obtenidos desta...

  6. Neoinstitucionalismo: ¿es posible un diálogo entre historiadores, juristas y economistas?

    Directory of Open Access Journals (Sweden)

    Jaime Eduardo Londoño Motta

    2002-12-01

    Full Text Available En vista de una deseable y necesaria comunicación activa entre historiadores, economistas y juristas, para estudiar la crisis de la sociedad colombiana, vale la penas tener en cuenta el neoinstitucionalismo de Douglas North entendiéndolo desde una perspectiva pluridisciplinar. Se discuten las posibilidades analíticas que ofrece tal apropiación del modelo, se analiza la situación de la historiografía, la economía y el derecho en Colombia y se conjeturan las probabilidades institucionales de un diálogo entre esas disciplinas.

  7. La afinidad electiva entre consumo cultural y percepción sociocultural: el caso de Chile

    OpenAIRE

    Tomás Peters Núñez

    2010-01-01

    El presente artículo demuestra la afinidad electiva entre consumo cultural y percepción sociocultural. A partir de los datos de la Encuesta de participación y consumo cultural 2009, de Chile, se muestra evidencia estadística de que el consumo cultural mantiene una afinidad electiva con las valoraciones democráticas, políticas, sociales y ciudadanas de los consumidores. Esta tendencia también es observable entre las personas que pertenecen a segmentos de la población con bajos ingresos económi...

  8. Las relaciones entre España y Japón

    OpenAIRE

    Jensana, Amadeo

    2013-01-01

    Si bien España y Japón son dos países separados por más de 10.000 kilómetros existe una importante afinidad cultural entre ambos pueblos. Los japoneses admiran muchas de las manifestaciones culturales españolas, entre las que destacan la arquitectura (especialmente el Modernismo catalán), el flamenco, la gastronomía o el deporte (hay numerosos seguidores de la Liga Profesional de Fútbol). Por su parte, los españoles son plenamente conscientes del nivel tecnológico de las grandes corporacio...

  9. Realidad de maltrato en las relaciones afectivas entre jóvenes mexicanos durante el noviazgo

    OpenAIRE

    Cortés Ayala, Lourdes

    2016-01-01

    El objetivo de esta Tesis Doctoral fue estudiar la prevalencia de violencia en el noviazgo en jovenes mexicanos a traves de cuatro estudios. El objetivo del primer estudio ex post facto fue establecer la autopercepción de maltrato, así como los sentimientos de miedo y atrapado que existen entre los miembros de una relación de pareja, y determinar si hay diferencias en la prevalencia de los diferentes tipos de violencia o victimización entre los que se perciben maltratados y los que no, tenien...

  10. Relación entre el período de lactancia materna y maloclusiones

    OpenAIRE

    Rosa Gabriela Rondón; Gabriel Alejandro Zambrano; María Elena Guerra

    2012-01-01

    Los beneficios de la lactancia materna en la prevención de las maloclusiones han sido descritos en la literatura odontológica, destacando que lactar exclusivamente más de 6 meses disminuye su prevalencia. Objetivo: determinar la relación entre periodo de Lactancia Materna y Maloclusiones. Material y métodos: se examinó una muestra de 59 niños en edades entre 6 y 13 años en la parroquia Higuerote, Miranda, Venezuela. Se aplicó un cuestionario a cada representante para obtener datos sobre el pe...

  11. Diversidad de anfibios anuros del Parque Nacional El Palmar (Provincia de Entre Ríos, Argentina)

    OpenAIRE

    Gangenova, Elena; Guzmán, Atilio; Marangoni, Federico

    2012-01-01

    El Parque Nacional El Palmar (PNEP) es una importante área protegida de la zona este de la provincia de Entre Ríos, Argentina, creado para conservar uno de los últimos fragmentos de palmera yatay (Butia yatay). En este estudio se examina la biodiversidad de la comunidad de anfibios anuros que habitan tres tipos de ambientes del Parque; el pajonal, el pastizal y la selva en galería. Los muestreos se llevaron a cabo entre los meses de primavera-verano de 2008 y 2009. En total se registraron 16 ...

  12. Diagnóstico diferencial entre el espectro autista y el espectro esquizofrénico

    OpenAIRE

    Paula Pérez, Isabel, 1970-

    2012-01-01

    Introducción: La distinción nosológica entre espectro autista y espectro esquizofrénico está hoy en día claramente delimitada, a pesar de las evidencias científicas de la relación genética entre ambas condiciones. El solapamiento de síntomas negativos de la esquizofrenia con ciertas manifestaciones autistas y la atribución errónea de síntomas positivos de la esquizofrenia en el autismo por profesionales no familiarizados con los trastornos del espectro autista ponen de relieve la importancia ...

  13. Intervención Positiva para mejorar la Felicidad: Practicando gratitud entre hombres y mujeres

    OpenAIRE

    Aranda Rivas, Joel

    2015-01-01

    Treball Final de Grau en Psicologia. Codi: PS1048.Curs: 2014/2015 El objetivo del presente trabajo es estudiar la relación que tienen los sujetos entre una prueba de gratitud (carta de agradecimiento) y sus niveles de felicidad. Se ha utilizado un diseño cuasi-experimental de laboratorio, con dos momentos de recogida de datos sobre una muestra compuesta por 3 grupos de 10 personas, de las cuales 5 son hombres y 5 mujeres, para encontrar diferencia entre el género. Las condiciones experimen...

  14. Genes candidatos para la comorbilidad entre trastornos de ansiedad y trastornos adictivos.

    OpenAIRE

    Gallego Moreno, Xavier

    2008-01-01

    Esta Tesis Doctoral ha consistido en el estudio de los mecanismos implicados en la comorbilidad entre el abuso de drogas y los trastornos de ansiedad, así como en las regiones cerebrales responsables de la coexistencia de estos dos trastornos en modelos transgénicos. Nos hemos centrado en dos grandes familias de genes, que podrían actuar como interfaz genético en la comorbilidad entre trastornos de ansiedad y de abuso de sustancias: neurotrofinas por su intervención en el neurodesarrollo y en...

  15. Asociación entre psoriasis y el control de diabetes mellitus tipo 2

    OpenAIRE

    García Montañez, María Andrea

    2014-01-01

    La psoriasis es una enfermedad que se caracteriza por un proceso inflamatorio crónico y exagerado local y sistémico. Se ha encontrado en la literatura una relación entre la psoriasis y el desarrollo de patologías como diabetes mellitus tipo 2 y el mal control de estas patologías, lo cual aumenta la morbimortalidad de estos pacientes. El presente estudio mostró que no se encontró asociación entre psoriasis y el control de la DM2 , y que la variable mas significativa sobre el control es la ad...

  16. Cooling of molecular ion beams

    International Nuclear Information System (INIS)

    Wolf, A.; Krohn, S.; Kreckel, H.; Lammich, L.; Lange, M.; Strasser, D.; Grieser, M.; Schwalm, D.; Zajfman, D.

    2004-01-01

    An overview of the use of stored ion beams and phase space cooling (electron cooling) is given for the field of molecular physics. Emphasis is given to interactions between molecular ions and electrons studied in the electron cooler: dissociative recombination and, for internally excited molecular ions, electron-induced ro-vibrational cooling. Diagnostic methods for the transverse ion beam properties and for the internal excitation of the molecular ions are discussed, and results for phase space cooling and internal (vibrational) cooling are presented for hydrogen molecular ions

  17. THE CALIFORNIA MOLECULAR CLOUD

    International Nuclear Information System (INIS)

    Lada, Charles J.; Lombardi, Marco; Alves, Joao F.

    2009-01-01

    We present an analysis of wide-field infrared extinction maps of a region in Perseus just north of the Taurus-Auriga dark cloud complex. From this analysis we have identified a massive, nearby, but previously unrecognized, giant molecular cloud (GMC). Both a uniform foreground star density and measurements of the cloud's velocity field from CO observations indicate that this cloud is likely a coherent structure at a single distance. From comparison of foreground star counts with Galactic models, we derive a distance of 450 ± 23 pc to the cloud. At this distance the cloud extends over roughly 80 pc and has a mass of ∼ 10 5 M sun , rivaling the Orion (A) molecular cloud as the largest and most massive GMC in the solar neighborhood. Although surprisingly similar in mass and size to the more famous Orion molecular cloud (OMC) the newly recognized cloud displays significantly less star formation activity with more than an order of magnitude fewer young stellar objects than found in the OMC, suggesting that both the level of star formation and perhaps the star formation rate in this cloud are an order of magnitude or more lower than in the OMC. Analysis of extinction maps of both clouds shows that the new cloud contains only 10% the amount of high extinction (A K > 1.0 mag) material as is found in the OMC. This, in turn, suggests that the level of star formation activity and perhaps the star formation rate in these two clouds may be directly proportional to the total amount of high extinction material and presumably high density gas within them and that there might be a density threshold for star formation on the order of n(H 2 ) ∼ a few x 10 4 cm -3 .

  18. Computational methods for molecular imaging

    CERN Document Server

    Shi, Kuangyu; Li, Shuo

    2015-01-01

    This volume contains original submissions on the development and application of molecular imaging computing. The editors invited authors to submit high-quality contributions on a wide range of topics including, but not limited to: • Image Synthesis & Reconstruction of Emission Tomography (PET, SPECT) and other Molecular Imaging Modalities • Molecular Imaging Enhancement • Data Analysis of Clinical & Pre-clinical Molecular Imaging • Multi-Modal Image Processing (PET/CT, PET/MR, SPECT/CT, etc.) • Machine Learning and Data Mining in Molecular Imaging. Molecular imaging is an evolving clinical and research discipline enabling the visualization, characterization and quantification of biological processes taking place at the cellular and subcellular levels within intact living subjects. Computational methods play an important role in the development of molecular imaging, from image synthesis to data analysis and from clinical diagnosis to therapy individualization. This work will bring readers fro...

  19. Molecular Mechanisms of Preeclampsia.

    Science.gov (United States)

    Hod, Tammy; Cerdeira, Ana Sofia; Karumanchi, S Ananth

    2015-08-20

    Preeclampsia is a pregnancy-specific disease characterized by new onset hypertension and proteinuria after 20 wk of gestation. It is a leading cause of maternal and fetal morbidity and mortality worldwide. Exciting discoveries in the last decade have contributed to a better understanding of the molecular basis of this disease. Epidemiological, experimental, and therapeutic studies from several laboratories have provided compelling evidence that an antiangiogenic state owing to alterations in circulating angiogenic factors leads to preeclampsia. In this review, we highlight the role of key circulating antiangiogenic factors as pathogenic biomarkers and in the development of novel therapies for preeclampsia. Copyright © 2015 Cold Spring Harbor Laboratory Press; all rights reserved.

  20. De novo molecular design

    CERN Document Server

    Schneider, Gisbert

    2013-01-01

    Systematically examining current methods and strategies, this ready reference covers a wide range of molecular structures, from organic-chemical drugs to peptides, Proteins and nucleic acids, in line with emerging new drug classes derived from biomacromolecules. A leader in the field and one of the pioneers of this young discipline has assembled here the most prominent experts from across the world to provide first-hand knowledge. While most of their methods and examples come from the area of pharmaceutical discovery and development, the approaches are equally applicable for chemical probes an

  1. Molecular water oxidation catalysis

    CERN Document Server

    Llobet, Antoni

    2014-01-01

    Photocatalytic water splitting is a promising strategy for capturing energy from the sun by coupling light harvesting and the oxidation of water, in order to create clean hydrogen fuel. Thus a deep knowledge of the water oxidation catalysis field is essential to be able to come up with useful energy conversion devices based on sunlight and water splitting. Molecular Water Oxidation Catalysis: A Key Topic for New Sustainable Energy Conversion Schemes presents a comprehensive and state-of-the-art overview of water oxidation catalysis in homogeneous phase, describing in detail the most importan

  2. Nuclear molecular states

    International Nuclear Information System (INIS)

    Abe, Y.

    1975-01-01

    The effects of polarization on the stability of α-cluster structures in 8 Be and 12 C nuclei are studied in the intrinsic states. The extent of the polarization of α-clusters is investigated by employing a molecular-orbital model. Two α-cluster structure of 8 Be is shown to be extremely stable, and a triangular configuration of three α-clusters is also shown to be stable, but the polarizations of α-clusters are found rather large. Gruemmer--Faessler's method is discussed and their results are shown to be trivial

  3. Molecular epidemiology of ascariasis

    DEFF Research Database (Denmark)

    Betson, Martha; Halstead, Fennella; Nejsum, Peter

      We are using molecular epidemiology techniques to study the population structure of Ascaris obtained from humans and pigs. Worms were obtained from human hosts on Zanzibar and in Uganda, Bangladesh, Guatemala and Nepal and Ascaris from pigs were collected from in Uganda, Tanzania, Denmark......, Guatemala and the Philippines. Genomic DNA was extracted from each worm and a 450 base pair fragment of the mitochondrial cytochrome oxidase gene subunit 1 (COI) was PCR amplified. The products were sequenced from both strands and sequences were manually edited. Fifty different Ascaris CO1 haplotypes were...

  4. Molecular collision theory

    CERN Document Server

    Child, M S

    2010-01-01

    This high-level monograph offers an excellent introduction to the theory required for interpretation of an increasingly sophisticated range of molecular scattering experiments. There are five helpful appendixes dealing with continuum wavefunctions, Green's functions, semi-classical connection formulae, curve-crossing in the momentum representation, and elements of classical mechanics.The contents of this volume have been chosen to emphasize the quantum mechanical and semi-classical nature of collision events, with little attention given to purely classical behavior. The treatment is essentiall

  5. The nonequilibrium molecular dynamics

    International Nuclear Information System (INIS)

    Hoover, W.G.

    1992-03-01

    MOLECULAR DYNAMICS has been generalized in order to simulate a variety of NONEQUILIBRIUM systems. This generalization has been achieved by adopting microscopic mechanical definitions of macroscopic thermodynamic and hydrodynamic variables, such as temperature and stress. Some of the problems already treated include rapid plastic deformation, intense heat conduction, strong shockwaves simulation, and far-from-equilibrium phase transformations. Continuing advances in technique and in the modeling of interatomic forces, coupled with qualitative improvements in computer hardware, are enabling such simulations to approximate real-world microscale and nanoscale experiments

  6. Molecular Mechanisms of Preeclampsia

    Science.gov (United States)

    Hod, Tammy; Cerdeira, Ana Sofia; Karumanchi, S. Ananth

    2015-01-01

    Preeclampsia is a pregnancy-specific disease characterized by new onset hypertension and proteinuria after 20 wk of gestation. It is a leading cause of maternal and fetal morbidity and mortality worldwide. Exciting discoveries in the last decade have contributed to a better understanding of the molecular basis of this disease. Epidemiological, experimental, and therapeutic studies from several laboratories have provided compelling evidence that an antiangiogenic state owing to alterations in circulating angiogenic factors leads to preeclampsia. In this review, we highlight the role of key circulating antiangiogenic factors as pathogenic biomarkers and in the development of novel therapies for preeclampsia. PMID:26292986

  7. Introduction to basic molecular biologic techniques for molecular imaging researches

    International Nuclear Information System (INIS)

    Kang, Joo Hyun

    2004-01-01

    Molecular imaging is a rapidly growing field due to the advances in molecular biology and imaging technologies. With the introduction of imaging reporter genes into the cell, diverse cellular processes can be monitored, quantified and imaged non-invasively in vivo. These processes include the gene expression, protein-protein interactions, signal transduction pathways, and monitoring of cells such as cancer cells, immune cells, and stem cells. In the near future, molecular imaging analysis will allow us to observe the incipience and progression of the disease. These will make us easier to give a diagnosis in the early stage of intractable diseases such as cancer, neuro-degenerative disease, and immunological disorders. Additionally, molecular imaging method will be a valuable tool for the real-time evaluation of cells in molecular biology and the basic biological studies. As newer and more powerful molecular imaging tools become available, it will be necessary to corporate clinicians, molecular biologists and biochemists for the planning, interpretation, and application of these techniques to their fullest potential. In order for such a multidisciplinary team to be effective, it is essential that a common understanding of basic biochemical and molecular biologic techniques is achieved. Basic molecular techniques for molecular imaging methods are presented in this paper

  8. Photoinduced diffusion molecular transport

    Energy Technology Data Exchange (ETDEWEB)

    Rozenbaum, Viktor M., E-mail: vik-roz@mail.ru, E-mail: litrakh@gmail.com [Chuiko Institute of Surface Chemistry, National Academy of Sciences of Ukraine, Generala Naumova St. 17, Kiev 03164 (Ukraine); Dekhtyar, Marina L. [Institute of Organic Chemistry, National Academy of Sciences of Ukraine, Murmanskaya St. 5, Kiev 02094 (Ukraine); Lin, Sheng Hsien [Department of Applied Chemistry, National Chiao Tung University, 1001 Ta Hsuen Road, Hsinchu 300, Taiwan (China); Trakhtenberg, Leonid I., E-mail: vik-roz@mail.ru, E-mail: litrakh@gmail.com [Semenov Institute of Chemical Physics, Russian Academy of Sciences, Kosygin Street 4, Moscow 119991, Russia and Moscow Institute of Physics and Technology (State University), Institutskii Per. 9, Dolgoprudnyi, Moscow Region 141700 (Russian Federation)

    2016-08-14

    We consider a Brownian photomotor, namely, the directed motion of a nanoparticle in an asymmetric periodic potential under the action of periodic rectangular resonant laser pulses which cause charge redistribution in the particle. Based on the kinetics for the photoinduced electron redistribution between two or three energy levels of the particle, the time dependence of its potential energy is derived and the average directed velocity is calculated in the high-temperature approximation (when the spatial amplitude of potential energy fluctuations is small relative to the thermal energy). The thus developed theory of photoinduced molecular transport appears applicable not only to conventional dichotomous Brownian motors (with only two possible potential profiles) but also to a much wider variety of molecular nanomachines. The distinction between the realistic time dependence of the potential energy and that for a dichotomous process (a step function) is represented in terms of relaxation times (they can differ on the time intervals of the dichotomous process). As shown, a Brownian photomotor has the maximum average directed velocity at (i) large laser pulse intensities (resulting in short relaxation times on laser-on intervals) and (ii) excited state lifetimes long enough to permit efficient photoexcitation but still much shorter than laser-off intervals. A Brownian photomotor with optimized parameters is exemplified by a cylindrically shaped semiconductor nanocluster which moves directly along a polar substrate due to periodically photoinduced dipole moment (caused by the repetitive excited electron transitions to a non-resonant level of the nanocylinder surface impurity).

  9. Chemoradiotherapy and molecular biology

    International Nuclear Information System (INIS)

    Hasegawa, Masatoshi; Mitsuhashi, Norio; Niibe, Hideo

    2000-01-01

    The current status of chemoradiotherapy was reviewed from the standpoint of molecular biology. Chemoradiotherapy was conducted to achieve systemic tumor control, to intensify the response to irradiation, and to reduce adverse reactions. The mechanisms of the efficacy of chemoradiotherapy were: modification of dose-response relationships, inhibition of tumor cell recovery from sublethal damage or potential lethal damage, effects on cell dynamics and the cell cycle, improvement of blood flow or reoxygenation, recruitment, improvement of drug uptake, increased cell damage. Cell death (necrosis and apoptosis) and cancer-related genes were described, as the essential points, because they are involved in the response to chemoradiotherapy. Cisplatin (platinum compound), 5-fluorouracil, etoposide, and taxoid (paclitaxel, docetaxel) were the principal anticancer agents used for chemoradiotherapy, and they enhanced the effects of irradiation. However, even when good responses or synergism between anticancer drug and radiotherapy was observed in in vitro studies, there was little therapeutic advantage clinically. Data from in vitro and in vivo studies should be collected and systemized, and ''molecular biology in chemotherapy'' that can be applied clinically may become established. (K.H.)

  10. Molecular beam kinetics

    International Nuclear Information System (INIS)

    Behrens, R. Jr.

    1975-11-01

    The design of a crossed molecular beam ''supermachine'' for neutral--neutral collisions is discussed. The universal electron bombardment ionizer, mass filter, and ion detection system of the detector, the supersonic nozzle sources, the differential pumping arrangement for the sources and detector, the time-of-flight detection of scattered products, and the overall configuration of the apparatus are described. The elastic scattering of two systems, CH 4 + Ar and NH 3 + Ar, has been measured using the supermachine with two supersonic nozzle sources. The rainbow structure and the interference oscillations are seen in each system. The best fit to the data was found using a Morse--Spline--Van der Waals (MSV) potential. The three potential parameters epsilon, r/sub m/, and β were found to be 2.20(+-0.04) x 10 -14 ergs, 3.82(+-0.04)A, and 7.05 +- 0.20 for CH 4 + Ar, and 2.21(+-0.04) x 10 -14 ergs 3.93 (+-0.05)A, and 8.45 +- 0.30 for NH 3 + Ar. A new phenomenon in crossed molecular beams of condensation of a molecule on a cluster to form a complex was observed. A bromine molecule condensed on clusters of chlorine (Cl 2 )/sub chi/ and ammonia (NH 3 )/sub chi/. The value of chi for measurements in these experiments ranges from 7 to 40 for chlorine clusters and from 10 to 70 ammonia clusters

  11. Molecular biology of potyviruses.

    Science.gov (United States)

    Revers, Frédéric; García, Juan Antonio

    2015-01-01

    Potyvirus is the largest genus of plant viruses causing significant losses in a wide range of crops. Potyviruses are aphid transmitted in a nonpersistent manner and some of them are also seed transmitted. As important pathogens, potyviruses are much more studied than other plant viruses belonging to other genera and their study covers many aspects of plant virology, such as functional characterization of viral proteins, molecular interaction with hosts and vectors, structure, taxonomy, evolution, epidemiology, and diagnosis. Biotechnological applications of potyviruses are also being explored. During this last decade, substantial advances have been made in the understanding of the molecular biology of these viruses and the functions of their various proteins. After a general presentation on the family Potyviridae and the potyviral proteins, we present an update of the knowledge on potyvirus multiplication, movement, and transmission and on potyvirus/plant compatible interactions including pathogenicity and symptom determinants. We end the review providing information on biotechnological applications of potyviruses. © 2015 Elsevier Inc. All rights reserved.

  12. Relação entre o investimento social corporativo e o valor das empresas brasileiras

    Directory of Open Access Journals (Sweden)

    Annor da Silva Junior

    2010-08-01

    Full Text Available Este estudo tem por objetivo investigar a existência de relação entre os investimentos sociais corporativos e o valor das empresas listadas na Bolsa de Valores de São Paulo (Bovespa e que publicam balanço social no Instituto Brasileiro de Análises Sociais e Econômicas (Ibase, mais especificamente, identificando se empresas que investem sistematicamente em responsabilidade social têm seu valor potencializado ou diminuído. Os resultados encontrados não evidenciaram que investimentos em práticas de responsabilidade social acarretam um melhor ou pior desempenho no valor de mercado das empresas. Encontrou-se relação não significativa entre a variável de controle tamanho da empresa e o q de Tobin em empresas com investimentos sociais corporativos. Encontrou-se relação negativa entre alguns setores de mercado e o valor das empresas representados pelo q de Tobin. Foi confirmado por esta pesquisa a relação positiva entre o tamanho das empresas e o valor dos investimentos sociais corporativos.

  13. RELACIÓN ENTRE CONDUCTA PARENTAL Y ADHERENCIA AL TRATAMIENTO EN DIABETES INFANTIL.

    Directory of Open Access Journals (Sweden)

    Rochy Vargas

    2008-07-01

    Full Text Available En este artículo, enmarcado en la psicología de la salud, se pretende identificar la relación que existe entre la conducta parental y la adherencia al tratamiento a partir de un diseño no-experimental de tipo transversal descriptivo correlacional, en una muestra de niños con diabetes tipo I, entre 8 y 11 años de edad, con un tiempo desde el diagnóstico de entre uno y tres años. Los resultados analizados señalan la relación que existe entre los comportamientos que engloba la variable de conducta parental y adherencia al tratamiento, pudiendo incluso diferenciar aquellos comportamientos más representativos para cada categoría; así por ejemplo, se encontró que la comunicaciónafectiva es el comportamiento parental que más está correlacionado con las conductas de adhesión. Con respecto a las conductas de adhesión al tratamiento, la dieta fue la conducta de este tipo que más se correlacionó con comportamientos parentales.

  14. Relación entre conducta parental y adherencia al tratamiento en diabetes infantil

    Directory of Open Access Journals (Sweden)

    Mónica María Novoa Gómez

    2008-01-01

    Full Text Available En este artículo, enmarcado en la psicología de la salud, se pretende identificar la relación que existe entre la conducta parental y la adherencia al tratamiento a partir de un diseño no-experimental de tipo transversal descriptivo correlacional, en una muestra de niños con diabetes tipo I, entre 8 y 11 años de edad, con un tiempo desde el diagnóstico de entre uno y tres años. Los resultados analizados señalan la relación que existe entre los comportamientos que engloba la variable de conducta parental y adherencia al tratamiento, pudiendo incluso diferenciar aquellos comportamientos más representativos para cada categoría; así por ejemplo, se encontró que la comunicación afectiva es el comportamiento parental que más está correlacionado con las conductas de adhesión. Con respecto a las conductas de adhesión al tratamiento, la dieta fue la conducta de este tipo que más se correlacionó con comportamientos parentales.

  15. Alinhamento estratégico entre empresas fabricantes de equipamentos e alimentos

    Directory of Open Access Journals (Sweden)

    Roberto Giro Moori

    2009-08-01

    Full Text Available Este trabalho tem por objetivo verificar o alinhamento das prioridades competitivas entre empresas compradoras e usuárias de máquinas e equipamentos para a fabricação de produtos alimentícios e seus fornecedores industriais. Está fundamentado em uma pesquisa exploratória descritiva em que se aplicou um questionário estruturado junto a gestores das áreas relacionadas a compras, vendas e produção das empresas. Foram obtidas 77 respostas de gestores de empresas fabricantes de alimentos e 55 de fabricantes de equipamentos. Os dados, submetidos à estatística descritiva e à correlação bivariada não paramétrica, revelaram que: a no âmbito do relacionamento entre compradores e vendedores de máquinas e equipamentos, o fator qualidade foi a prioridade competitiva alinhada entre eles; b no âmbito de empresas usuárias de máquinas e equipamentos, houve evidência de trade-off entre as variáveis reduzir estoques e velocidade de entrega rápida. Essas revelações permitiram concluir que: a a qualidade é um fator de alinhamento externo e interno; b o trade-off é usado como um instrumento para o alinhamento das prioridades competitivas no ambiente interno das empresas compradoras e usuárias de máquinas e equipamentos.

  16. Liens entre le savoir et l'innovation dans les services de gestion des ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    Ce projet de recherche-action portera sur l'innovation dans la prestation de services par les administrations locales au Sri Lanka. Il ciblera principalement les administrateurs locaux chargés de la prestation des services de gestion des déchets solides. Les chercheurs établiront dans quelle mesure les interactions entre les ...

  17. Macro fossils vegetable in Palmar formation (later pleistocene) in Entre Rios - Argentina

    International Nuclear Information System (INIS)

    Ramos, R.; Brea, M.; Krohling, D.

    2012-01-01

    This work is about the macro fossil knowledge preserved like wood fossils in the El Palmar Formation (Late Pleistocene) from a systematic - anatomical as well as paleoecological and paleoclimate point of view.The paleo Flora comes from various fossil located in the province of Entre Rios - Argentina

  18. Perspectivas quanto a negociações entre israelenses e palestinos

    Directory of Open Access Journals (Sweden)

    Heitor Figueiredo Sobral Torres

    2009-06-01

    Full Text Available Como a política externa norteamericana pode estimular novas dinâmicas nas negociações entre israelenses e palestinos.

  19. ENTRE IDEOLOGIA E UTOPIA: A DIALÉTICA DA IMAGINAÇÃO EM MANNHEIM

    Directory of Open Access Journals (Sweden)

    Mateus Augusto de Oliveira

    2017-07-01

    Full Text Available O objetivo deste trabalho é analisar o conceito de utopia elaborado pelo sociólogo húngaro Karl Mannheim. Para tanto, estudaremos o papel desempenhado pela obra Ideologia e utopia no pensamento de Mannheim. O livro é a carta de fundação da sociologia do conhecimento como disciplina autônoma. Mostraremos como Ideologia e utopia desenvolve uma aproximação entre imaginário e política. Mannheim argumenta que toda sociedade se alicerça em ficções, símbolos, mitos e ritos. O sociólogo distancia-se de Marx e Engels ao criticar a distinção entre consciência alienada e consciência esclarecida, ciência e ideologia. No cerne da sociologia do conhecimento desenvolvida por Mannheim está uma polarização entre ideologia e utopia, definida pelo filósofo Paul Ricoeur como “dialética da imaginação”. Para Mannheim, o conceito de ‘utopia’ se desenvolveria em contraposição à noção de ‘ideologia’: a tensão entre um e outro estaria na base de toda comunidade.

  20. Determinantes da Distribuição da (Desigualdade de Gênero entre os Estados Brasileiros

    Directory of Open Access Journals (Sweden)

    Adriana Bruscato Bortoluzzo

    2016-03-01

    Full Text Available Resumo A igualdade de gênero é fundamental para um desenvolvimento econômico sustentável. O Brasil, apesar de ser uma das maiores economias do mundo, ainda precisa de um grande avanço no sentido de conquistar uma sociedade mais igualitária entre homens e mulheres quando comparado a países do mesmo porte econômico. O presente estudo faz uma análise da evolução da igualdade de gênero no Brasil entre 1997 e 2012, e quais os impactos da globalização, do desenvolvimento econômico e de medidas de bem-estar sobre a distribuição da igualdade de gênero entre os estados brasileiros. Para isso, foi utilizada a metodologia econométrica de dados em painel. Os resultados mostram que a igualdade de gênero aumentou no período e que, além disso, a globalização, mensurada com base no investimento direto estrangeiro e no acesso da população a aparelhos de televisão, elevou a igualdade entre os sexos no Brasil.

  1. Importantes diferencias entre facultades de medicina. Implicaciones para la medicina de familia y comunitaria

    Directory of Open Access Journals (Sweden)

    Beatriz González Lopez-Valcarcel

    2014-03-01

    Conclusiones: La conveniente competencia por comparación entre las facultades, su currículum de MFyC, así como la insistencia en los atributos más atractivos de la especialidad pueden contribuir a la necesaria renovación de la MFyC.

  2. Entre Dos Mundos/Between Two Worlds: Youth Violence Prevention for Acculturating Latino Families

    Science.gov (United States)

    Smokowski, Paul R.; Bacallao, Martica

    2009-01-01

    Objective: This study evaluated the efficacy of Entre Dos Mundos/Between Two Worlds (EDM) prevention for Latino adolescents. Method: In an experimental trial to compare implementation formats, 41 Latino families were randomly assigned to EDM action-oriented skills training groups, and 47 families were randomly assigned to unstructured EDM support…

  3. Caracterização molecular de cultivares de pessegueiro e nectarineira com microssatélites Molecular characterization of peach and nectarine cultivars though microsatellites markers

    Directory of Open Access Journals (Sweden)

    Valmor João Bianchi

    2004-12-01

    Full Text Available Na certificação de mudas de plantas frutíferas, a identificação genética é importante em todas as etapas do processo de produção. Em pessegueiro, a identificação de genótipos baseada somente em características morfofenológicas deixa dúvidas quanto à verdadeira identidade de algumas cultivares. Marcadores moleculares de microssatélies foram utilizados objetivando a caracterização molecular de 8 cultivares de nectarineira e 28 de pessegueiro. Para a análise, foram utilizados 13 incializadores de microssatélites (primers, sendo que todos foram marcadores produzindo polimorfismo suficiente para identificar 32 das 36 cultivares analisadas. A maior similaridade genética verificada nas cultivares para consumo in natura foi entre Coral e Planalto (0,94 e entre Della Nona e Marfim (0,90, enquanto, para os pessegueiros para indústria, foi de 0,93 entre Jubileu e Capdeboscq e de 0,92 entre Jade e Esmeralda. Os marcadores de microssatélites permitiram separar em grupos distintos as nectarineiras e os pessegueiros de consumo in natura dos de indústria, havendo uma elevada concordância entre os dados genealógicos das cultivares e os dados gerados pelos microssatélites, confirmando a grande utilidade da técnica para a caracterização genética.Genetic identification of fruit tree plants is important in all phases of the production process. On peach the genotypes identification based only on the morphologic and phenologic characteristics leaves doubts on the true identity of some cultivars. Microsatellite markers were used aiming at the molecular characterization of eight nectarine and 28 peach cultivars. Thirteen microsatellite primers were used and all of them generated enough polimorfism that may identify 32 out of 36 of the analysed cultivars. The greatest genetic similarity was found between the fresh market 'Coral' and 'Planalto'(0,94 and between the 'Della Nona' and 'Marfim' cultivars (0,90, whereas for caning peaches the

  4. Patrones diferenciales de mortalidad entre inmigrantes nicaragüenses y residentes nativos de Costa Rica

    Directory of Open Access Journals (Sweden)

    Herring, Andrew A.

    2008-07-01

    Full Text Available Utilizando datos del Registro Nacional de defunciones de los años 1996-2005 se calcularon las tasas de mortalidad estandarizadas por edad para personas nacidas en Nicaragua versus personas nacidas en Costa Rica. Así mismo, utilizando modelos de regresión binomial se determinaron los riesgos relativos de mortalidad de los inmigrantes nicaragüenses versus personas nativas de Costa Rica con ajustes por edad, urbanización, desempleo, pobreza, educación y segregación residencial. Los hombres y mujeres nacidos en Nicaragua tuvieron un riesgo reducido de mortalidad de 32% y 34% respectivamente con relación a sus contrapartes nacidas en Costa Rica. Se notó que los riesgos de mortalidad por enfermedades infecciosas, cáncer, enfermedades crónicas pulmonares, enfermedades cardiovasculares, y enfermedades crónicas del hígado eran significativamente reducidos entre los inmigrantes nacidos en Nicaragua. El exceso significativo de mortalidad por homicidios se encontró entre los hombres nacidos en Nicaragua (RT = 1,35, 95% IC: 1,19; 1,53 y en mujeres (RT = 1,41, 95% IC: 1,02; 1,95. El riesgo relativo de causas de mortalidad de origen de tipo exógeno entre los inmigrantes nicaragüenses fue más grande entre los grupos de edad joven en áreas de baja densidad de inmigrantes nicaragüenses. La población nacida en Nicaragua residiendo en Costa Rica tiene un riesgo reducido de mortalidad por causas generales versus las personas nacidas en Costa Rica en los años entre 1996-2005. Esto se debe a una mortalidad por enfermedad reducida, la cual es bastante marcada. El homicidio es un una razón de mayor mortalidad entre los inmigrantes nacidos en Nicaragua versus los nativos costarricenses. Hay una gran necesidad de llevar acabo investigaciones adicionales sobre el rol de la migración, estatus socioeconómico y comportamientos entorno a la salud para poder explicar más a fondo los patrones de mortalidad diferenciales entre los inmigrantes nicarag

  5. Fatores associados ao consumo de álcool e drogas entre estudantes universitários

    Directory of Open Access Journals (Sweden)

    Leonardo V E Rueda Silva

    2006-04-01

    Full Text Available OBJETIVO: Estudos recentes mostram o uso preocupante de álcool e drogas entre universitários. O objetivo do trabalho foi verificar o grau de associação entre o estilo de vida e situação socioeconômica e o uso de álcool, tabaco, medicamentos e "drogas ilícitas" nos últimos 12 meses entre universitários. MÉTODOS: A amostra compreendeu 926 alunos da área de Ciências Biológicas de uma universidade do Município de São Paulo, os quais responderam a questionário anônimo e de auto-preenchimento em 2000 e 2001. Foram utilizados os testes de análise de variância e qui-quadrado para verificar a correlação entre o uso de substâncias e as variáveis estudadas. RESULTADOS: Entre os alunos com alguma religião, o consumo de álcool foi de 83,1%, o de tabaco, 20,7% e o de "drogas ilícitas", 24,6%, nesse período. Entre os alunos que não possuíam religião, o consumo nas três categorias foi superior nos últimos 12 meses: álcool (89,3%, tabaco (27,7% e "drogas ilícitas" (37,7%. A renda familiar mensal mostrou-se relacionada ao uso de álcool e "drogas ilícitas" (p<0,001 para ambos. Os alunos que utilizaram tabaco e "drogas ilícitas" apresentavam mais horas livres nos dias úteis do que os alunos que não fumavam no período analisado (p=0,033 e p=0,008, respectivamente. CONCLUSÕES: O consumo de substâncias psicoativas entre os alunos estudados foi comum, indicando a necessidade de implementação de medidas para reduzir tal consumo. Alunos com renda familiar alta e sem religião podem ser considerados com maior risco de consumo de drogas nessa população.

  6. Divergência genética entre cultivares de gérbera utilizando marcadores RAPD Genetic divergence among cultivars of gerbera using RAPD markers

    Directory of Open Access Journals (Sweden)

    Rodrigo Kelson Silva Rezende

    2009-11-01

    Full Text Available No processo de produção comercial de mudas de gérbera, a cor da flor é uma das principais características morfológicas de interesse agronômico, sendo uma característica importante em programas de melhoramento genético. A utilização de marcadores moleculares pode servir para direcionar cruzamentos, confirmar novos híbridos ou genótipos mutantes e identificar novos genótipos para fins comerciais. Nesse contexto, o objetivo deste trabalho foi analisar a divergência genética entre seis cultivares de Gerbera jamesonii ('Jaguar Yellow', 'Jaguar Cream', 'Jaguar Lemon', 'Jaguar Salmon Pastel', 'Jaguar Red', 'Jaguar Deep Rose'. A análise de divergência genética entre as cultivares de gérbera foi realizada utilizando-se 21 primers, os quais amplificaram 37 fragmentos polimórficos de DNA, que foram usados para estimar o coeficiente de Jaccard, o qual apresentou uma média de 0,38, variando de 0,28 a 0,56. A estrutura genética entre as cultivares foi estimada pelo UPGMA, revelando dois grupos distintos, a 38% de similaridade genética. A maior similaridade genética encontrada (56% foi entre as cultivares 'Jaguar Yellow' e 'Jaguar Lemon'. Os resultados demonstram que a técnica RAPD oferece uma maneira rápida, relativamente barata e útil para a caracterização da divergência genética entre as diferentes cultivares de Gerbera jamesonii com relação à cor da flor.During the commercial production of gerbera seedlings, flower color is one of the main morphological aspects that have an agronomic interest and becoming an important feature in genetic breeding programs. The use of molecular markers may serve to direct crossings, new hybrids and mutants, besides confirm and identify new genotypes for commercial purposes. In that context, this work aimed to analyze the genetic divergence among six cultivars of Gerbera jamesonii ('Jaguar Yellow', 'Jaguar Cream', 'Jaguar Lemon', 'Jaguar Salmon Pastel', 'Jaguar Red', 'Jaguar Deep Rose'. The

  7. Prevalencia de consumo de tabaco entre las medicas y enfermeras de la comunidad de Madrid

    Directory of Open Access Journals (Sweden)

    Fernández Ruiz Mª Luisa

    1999-01-01

    Full Text Available FUNDAMENTOS: El tabaquismo es responsable de una elevada mortalidad y morbilidad en nuestro pais. El tabaquismo de los profesionales de la salud tiene influencia sobre los hábitos de la población. En España, el tabaquismo esta incrementándose entre las mujeres. El objetivo de nuestro estudio es estudiar la prevalencia de consumo de tabaco entre las médicas y enfermeras de la Comunidad de Madrid, así como sus actitudes y conocimientos respecto al tabaquismo. MÉTODOS: Se ha realizado un estudio descriptivo transversal entre las mujeres profesionales de la salud (médicas y enfermeras de la Comunidad de Madrid, mediante una encuesta sobre hábito tabáquico, en un muestreo polietápico por conglomerados. RESULTADOS: Se han estudiado 1.235 profesionales ( 435 médicas y 800 enfermeras. El 43,07% del total son fumadoras, siendo el tabaquismo mayor en las enfermeras (47,62% que en las médicas (34,71%, y entre quienes trabajan en atención especializada (46,68% que entre las que lo hacen en atención primaria (35,29%. El tabaquismo fue diferente en ambas profesiones.según la edad En las médicas era menor tabaquismo en las edades entre 20 y 30 años (22,88%, y en las enfermeras este grupo de edad era el que tenia un mayor porcentaje de fumadoras (52,38%. Eran exfumadoras el 18,3% del total de las encuestadas, y el 64,65% de las que fumaban señalaron que habían intentado dejarlo. Un 2,93% fumaban delante de los/as pacientes, y un 14,94% pensaban que debía permitirse fumar en las salas de espera. El 27,46% creían que estaba permitido fumar en su area de trabajo, y el 90,64% señaló que se fumaba habitualmente en las salas de uso común del personal sanitario, y un 30,37% respondió que existía un lugar especifico para fumar en el centro de trabajo. CONCLUSIONES: La prevalencia de tabaquismo entre las profesionales de la salud, médicas y enfermeras, de la Comunidad de Madrid, es elevada, superior a la de la población general de igual edad

  8. Light and redox switchable molecular components for molecular electronics.

    Science.gov (United States)

    Browne, Wesley R; Feringa, Ben L

    2010-01-01

    The field of molecular and organic electronics has seen rapid progress in recent years, developing from concept and design to actual demonstration devices in which both single molecules and self-assembled monolayers are employed as light-responsive components. Research in this field has seen numerous unexpected challenges that have slowed progress and the initial promise of complex molecular-based computers has not yet been realised. Primarily this has been due to the realisation at an early stage that molecular-based nano-electronics brings with it the interface between the hard (semiconductor) and soft (molecular) worlds and the challenges which accompany working in such an environment. Issues such as addressability, cross-talk, molecular stability and perturbation of molecular properties (e.g., inhibition of photochemistry) have nevertheless driven development in molecular design and synthesis as well as our ability to interface molecular components with bulk metal contacts to a very high level of sophistication. Numerous groups have played key roles in progressing this field not least teams such as those led by Whitesides, Aviram, Ratner, Stoddart and Heath. In this short review we will however focus on the contributions from our own group and those of our collaborators, in employing diarylethene based molecular components.

  9. A SEPARAÇÃO ENTRE ESFERA PÚBLICA E PRIVADA: UM CONFRONTO ENTRE JOHN LOCKE, JEAN-JACQUES ROUSSEAU E CAROLE PATEMAN

    OpenAIRE

    Cunha de Moura, Samantha Nagle

    2014-01-01

    RESUMO: O presente artigo busca problematizar a separação entre esfera pública e esfera privada, existente no modelo liberal burguês, como um substrato legitimador da imposição de papeis sociais e sexuais diferenciados para homens e mulheres. Para tanto, o trabalho confronta as ideias fundamentais do pensamento de John Locke e de Jean-Jacques Rousseau, teóricos liberais contratualistas do séc. XVII-XVIII, diante da teoria do contrato sexual da teórica feminista Carole Pateman. Palavras-cha...

  10. Análise da associação entre saneamento e saúde nos estados Brasileiros: estudo comparativo entre 2001 e 2006

    OpenAIRE

    Teixeira,Júlio César; Gomes,Maria Helena Rodrigues; Souza,Janaina Azevedo de

    2011-01-01

    Em um contexto de baixo investimento em saneamento, Teixeira e Guilhermino (2006) estudaram a associação entre as condições de saneamento e os indicadores epidemiológicos nos estados brasileiros, utilizando dados secundários do banco de dados IDB (2003) do Ministério da Saúde. A partir de 2003, os investimentos em saneamento básico no Brasil aumentaram. Assim, o presente trabalho teve como objetivo testar a hipótese de que a ampliação da cobertura por serviços de saneamento básico no período ...

  11. Correlación entre dimensiones de personalidad de marca y la marca emocional Correlación entre dimensiones de personalidad de marca y la marca emocional

    Directory of Open Access Journals (Sweden)

    José Luis Pirela

    2007-06-01

    Full Text Available Los resultados de la investigación permiten explicar la relación entre los conceptosteóricos de Personalidad de Marca y Marca Emocional. Se han utilizado lasCadenas de Farmacias y los Centros Comerciales como productos de referencia.Se adoptó un muestreo no probabilístico accidental, para totalizar 554 muestrasa través de la aplicación de un cuestionario vía entrevistas personales y correoelectrónico. Para el procesamiento de los datos se aplicó un análisis de correlaciónde rangos de Spearman entre los rasgos de las dimensiones de personalidad y lasreferencias de marca emocional. El 98,5 % de los pares de correlación estudiadospresentaron valores superiores a α = 0,48, que no evidenció una asociación signifi -cativa entre las variables de estudio; esto lleva a concluir que en este caso no existeuna clara asociación entre marca emocional y personalidad de marca.The results from this study allow us to explain the relation between the two theoretical concepts  of brand personality and emotional branding. Pharmacy franchises and shopping centers were used as product references. A non-accidental probablistic sampling was used, for a total of 554 samples gathered by means of a questionaire administered via in-person  interviews or by Internet. The data was processed by applying Spearman’s correlation of ranges analysis to compare the features of the dimensions of personality and the emotional branding references. 98.5% of the correlation pairs studied showed values above a = 0.48, which represented no signifi cant association between the two variables under consideration. This leads us to the conclusion that in this case no clear relation exists between emotional branding and brand personality

  12. Correlación entre dimensiones de personalidad de marca y la marca emocional Correlación entre dimensiones de personalidad de marca y la marca emocional

    OpenAIRE

    José Luis Pirela; Oscar Colmenares; José Luis Saavedra Torres

    2007-01-01

    Los resultados de la investigación permiten explicar la relación entre los conceptosteóricos de Personalidad de Marca y Marca Emocional. Se han utilizado lasCadenas de Farmacias y los Centros Comerciales como productos de referencia.Se adoptó un muestreo no probabilístico accidental, para totalizar 554 muestrasa través de la aplicación de un cuestionario vía entrevistas personales y correoelectrónico. Para el procesamiento de los datos se aplicó un análisis de correlaciónde rangos de Spearman...

  13. "LAS PELEAS ENTRE EL DIABLO Y LA VIRGEN": PERMANENCIAS CULTURALES y memoria histórica entre los campesinos de Boyacá

    Directory of Open Access Journals (Sweden)

    CÉSAR MORENO BAPTISTA

    2001-01-01

    Full Text Available A PARTIR DE LOS TOPÓNIMOS, LOS RELATOS ORALES Y LOS DOCUMENTOS ESCRITOS SOBRE la localidad del desierto de La Candelaria, ubicado en el altiplano boyacense colombiano, el autor reconstruye el imaginario colectivo que en esta región pervive en torno al culto de la Virgen. "Las peleas entre el diablo y la Virgen" -como los lugareños se refieren a las luchas que dan origen a la identidad del lugar- configuran un espacio mitológico que explica la continuidad de la identidad sagrada de la localidad desde la época prehispánica hasta nuestros días.

  14. Cyberbullying: competencia social, motivación y relaciones entre iguales

    Directory of Open Access Journals (Sweden)

    2016-07-01

    Full Text Available El reconocimiento de cierto solapamiento entre el acoso cara a cara (bullying y el ciberacoso (cyberbullying puede indicar que variables de cognición social, cuya influencia ha sido reconocida en el bullying, también estén presentes en el acoso cibernético. El objetivo de la investigación fue estudiar el ajuste social de los implicados en cyberbullying y analizar las diferencias en la percepción de la competencia social, la motivación y el apoyo de los iguales, entre víctimas, agresores y agresores victimizados del cyberbullying. Un total de 505 adolescentes (47,3% chicas con edades comprendidas entre los 12 y 16 años (M=13.95; DT=1.42 participaron en el estudio. Se utilizaron instrumentos para adolescentes validados en español y se analizaron las propiedades psicométricas para la adaptación de la escala de competencia social. Análisis factoriales exploratorios y confirmatorios mostraron índices óptimos de fiabilidad y validez. Se observó una mayor implicación de los ciberagresores victimizados. Las comparaciones entre roles a través de pruebas no paramétricas mostraron en los ciberagresores un mayor apoyo social que el resto de perfiles y altos niveles en metas de popularidad. Las cibervíctimas destacaron por su alta percepción de competencia social. Los ciberagresores victimizados mostraron altos niveles de metas de popularidad y baja aceptación social. Los resultados obtenidos permiten concluir que la forma en que el grupo de iguales gestiona su vida emocional y social puede estar explicando la situación de cyberbullying entre los adolescentes.

  15. Relación entre calidad del semen y la edad

    Directory of Open Access Journals (Sweden)

    John Chávez

    2012-07-01

    Full Text Available Objetivo: Determinar la relación entre la calidad del semen humano y la edad. Material y Métodos: El espermatograma se realizó siguiendo el Manual de Laboratorio de la OMS para el examen del Semen Humano y de la Interacción Moco Cervical y Semen (1999, de los exámenes realizados entre julio 2003 a diciembre 2008. Se estudiaron 2 441 casos de varones que cumplen con los criterios de inclusión. Resultados: La motilidad A+B fue de 51,55% para varones de 20 a 29 años; los espermatozoides normales fue de 77,73% para varones mayores de 50 años; el recuento espermático (mill/ml fue de 61,09 para varones mayores de 50 años.La evaluación de la motilidad espermática tuvo como coeficiente de correlación lineal múltiple de 0,222 y coeficiente de determinación de 0,049; en la morfología espermática, coeficiente de correlación lineal de 0,0622 y coeficiente de determinación de 0,0039; en el recuento espermático, coeficiente de correlación lineal múltiple de 0,465 y coeficiente de determinación de 0,216. Conclusiones: existe una tendencia inversa entre la motilidad y la edad, una tendencia directa entre el recuento espermático y la edad, y una tendencia constante entre morfología espermática y edad.

  16. Correlación entre homofobia y racismo en estudiantes de medicina

    Directory of Open Access Journals (Sweden)

    Adalberto Campo-Arias

    2014-01-01

    Full Text Available El objetivo de este estudio fue determinar la correlación entre homofobia y racismo en estudiantes de medicina de Bucaramanga (Colombia. Se realizó un estudio transversal que incluyó a estudiantes mayores de 18 años. La actitud hacia homosexuales (homofobia o prejuicio sexual se midió con la Escala de Homofobia (EHF y la actitud hacia afrocolombianos (el racismo o la discriminación racial, con una versión en español de la Escala de Racismo Moderno (MRS. La asociación entre homofobia y racismo se calculó con los coeficientes de Pearson (r y Spearman (rs. Un grupo de 334 estudiantes aceptó participar. La media para la edad fue 20,1 años (DE=1,9, 59,0 % eran mujeres. El alfa de Cronbach fue 0,78 para la EHF y 0,62 para la MRS. Las puntuaciones en la EHF fueron entre 7 y 34 (media=17,8; SD=5,4 y en la MRS, entre 0 y 34 (media=13,8; SD=5,2. El coeficiente r fue 0,35 (p<0,001 y rs, 0,34 (p<0,001. Se concluye que existe correlación positiva entre estas formas de prejuicio (la homofobia y el racismo en estudiantes de medicina de Bucaramanga. Se necesita una intervención para reducir los prejuicios en los estudiantes de medicina.

  17. Actitudes hacia la autoridad y violencia entre adolescentes: diferencias en función del sexo

    Directory of Open Access Journals (Sweden)

    Laura Carrascosa

    2015-07-01

    Full Text Available Las conductas violentas en adolescentes constituyen una importante problemática social debido a sus graves consecuencias. El objetivo del presente estudio fue analizar las diferencias entre chicos y chicas adolescentes en conductas violentas dirigidas hacia sus iguales, y en algunas variables explicativas de estas conductas como sus actitudes hacia la autoridad y las normas, la comunicación con sus padres y la calidad de la relación con sus profesores. Se analizó también en qué medida las relaciones entre estas variables son diferentes en función del sexo. La muestra estuvo compuesta por 663 adolescentes (50.68% chicas, 49.32% chicos entre 12 y 15 años (M = 14.05 y DT = 1.38. Los resultados mostraron puntuaciones superiores en chicos en actitud positiva hacia la transgresión de normas y en violencia directa e indirecta, y superiores en chicas en comunicación abierta con la madre. Los resultados de los análisis de regresión indicaron una importante relación, en chicos y en chicas, entre las actitudes positivas a la transgresión de normas, la comunicación ofensiva con el padre y las conductas violentas directas e indirectas. La comunicación abierta con la madre y las actitudes positivas hacia la autoridad se relacionaron negativamente con la implicación de las chicas en conductas de violencia entre iguales. Estos resultados y sus implicaciones son analizados.

  18. Interações medicamentosas potenciais entre medicamentos psicotrópicos dispensados

    Directory of Open Access Journals (Sweden)

    Eloise Balen

    Full Text Available RESUMO Objetivo Estimar a frequência e caracterizar as interações medicamentosas potenciais entre fármacos psicotrópicos sujeitos a controle especial pela portaria 344/98 da Agência Nacional de Vigilância Sanitária (Anvisa, os quais foram prescritos e dispensados em uma farmácia pública do Município de Cascavel, Paraná. Métodos Estudo retrospectivo com desenho seccional foi realizado em uma Farmácia Pública Municipal. A amostra foi composta por prescrições de medicamentos sujeitos a controle especial, dispensados entre primeiro de julho a 31 de agosto de 2010. As prescrições retidas na farmácia foram analisadas retrospectivamente e as informações, coletadas. As interações medicamentosas potenciais foram identificadas em 824 prescrições. Resultados As prescrições eram na maioria para pacientes do sexo feminino e com idade entre 19 e 59 anos. Em relação à especialidade do prescritor, 30,6% foram prescritas por psiquiatra. Em 77,9% das prescrições identificou-se pelo menos uma interação medicamentosa potencial. Foram descritas 54 diferentes interações medicamentosas potenciais, sendo 34 graves e 20 moderadas. Encontrou-se uma correlação linear entre medicamentos prescritos e interações medicamentosas potenciais (p valor < 0,001. Conclusão O presente estudo identificou uma alta frequência de interações medicamentosas potenciais envolvendo fármacos de controle especial e uma associação positiva entre o número de fármacos prescritos com a maior frequência dessas interações.

  19. FLUJO DE GENES ENTRE FRIJOL COMÚN Y SILVESTRE EN COSTA RICA

    Directory of Open Access Journals (Sweden)

    N\\u00E9stor Chaves-Barrantes

    2009-01-01

    Full Text Available Con el objetivo de analizar el flujo de genes entre frijol común silvestre y cultivado, se determinó el porcentaje de alogamia en condiciones naturales de crecimie nto del frijol silvestre y en estación experimental. En el 2004 se evaluó el cruzamie nto natural entre frijol silvestre mexicano G23511A (Phaseolus vulgaris L. y la línea blanca PAN 68, en la Estación Experimental Fabio Baudrit de la Universidad de Costa Ri ca en Alajuela. Para ello se sembraron dos parcelas experimentales; cada una constó de dos bloques de PAN 68 de 10 surcos (15 m de largo y espacia dos 0,6 m. Entre los bloques y en el borde superior de los mismos, se sembraron tres surcos de frijol silvestre como donantes de polen. Se numeraron las hileras y las plantas de cada una en los bloques de frijol blanco. En Quircot de Ca rtago (área donde crece en forma natural P. vulgaris silvestre, en el 2005 y 2006, se sembraron plantas de frijol comercia l (Vainica de Palo a lo largo de seis sitios junto a las poblaciones de frijol silvestre. En ambas localidades la floración de silvestres y comerciales fue coincidente. Se cosechó toda la semilla de los ensayos y se germinó en bandejas, determinando el porcentaje de alogamia por medio del color morado del hip ocotilo, indicativo de aquellas plántulas cruzadas. En Alajuela el porcentaje de cruza varió entre 0,007 y 0,028 %; mie ntras que en Quircot, entre 0 y 0,199 %.

  20. Consumo de álcool e violência entre adolescentes argentinos

    Directory of Open Access Journals (Sweden)

    Mariaelena Pierobon

    2013-02-01

    Full Text Available OBJETIVO: Este estudo investigou a associação entre álcool e violência na população de jovens argentinos. MÉTODOS: Dados da Global School-based Student Health Survey (GSHS de 2007, uma pesquisa representativa em termos nacionais com alunos do ensino médio, foram examinados utilizando-se modelos de regressão logística ajustados por idade. RESULTADOS: Dos 1328 alunos participantes entre 13 e 15 anos de idade, 51,9% declararam ter consumido álcool no último mês, com taxas mais elevadas entre meninos (p = 0,04 e alunos mais velhos (p < 0,01. Homens e mulheres que bebem demonstraram estar quase duas vezes mais propensos a relatar agressão física, quando em uma briga física, e pensamentos sobre violência autoinfligida do que aqueles que não bebem. Entre as pessoas que bebem, aquelas que reportaram saúde mental precária, haviam sido vítimas de bullying, fumavam, faziam uso de drogas ou abandonaram a escola sem permissão se mostraram duas vezes mais propensas ao envolvimento em atividades violentas do que outras pessoas que também bebem. CONCLUSÃO: Intervenções de saúde pública quanto à violência entre jovens adolescentes devem ser desenvolvidas em combinação com programas de educação sobre álcool.

  1. Invalidez por dor nas costas entre segurados da Previdência Social do Brasil

    Directory of Open Access Journals (Sweden)

    Ney Meziat Filho

    2011-06-01

    Full Text Available OBJETIVO: Descrever as aposentadorias por invalidez decorrente de dor nas costas. MÉTODOS: Estudo descritivo com dados do Sistema Único de Informações de Benefícios e dos Anuários Estatísticos da Previdência Social em 2007. A taxa de incidência de dor nas costas como causa das aposentadorias por invalidez foi calculada segundo as variáveis idade e sexo, nos estados. Os dias de trabalho perdidos por invalidez decorrente de dor nas costas foram calculados segundo atividade profissional. RESULTADOS: A dor nas costas idiopática foi a primeira causa de invalidez entre as aposentadorias previdenciárias e acidentárias. A maioria dos beneficiários residia em área urbana e era comerciário. A taxa de incidência de dor nas costas como causa das aposentadorias por invalidez no Brasil foi de 29,96 por 100.000 contribuintes. Esse valor foi mais elevado entre os homens e entre as pessoas mais velhas. Rondônia exibiu taxa quatro vezes superior ao esperado (RT = 4,05 e a segunda maior taxa, referente à Bahia, foi de aproximadamente duas vezes o esperado (RT = 2,07. Os comerciários foram responsáveis por 96,9% dos dias perdidos por invalidez. CONCLUSÕES: A dor nas costas foi uma importante causa de invalidez em 2007, sobretudo entre comerciários, com grandes diferenças entre os estados.

  2. Assessment of Molecular Modeling & Simulation

    Energy Technology Data Exchange (ETDEWEB)

    None

    2002-01-03

    This report reviews the development and applications of molecular and materials modeling in Europe and Japan in comparison to those in the United States. Topics covered include computational quantum chemistry, molecular simulations by molecular dynamics and Monte Carlo methods, mesoscale modeling of material domains, molecular-structure/macroscale property correlations like QSARs and QSPRs, and related information technologies like informatics and special-purpose molecular-modeling computers. The panel's findings include the following: The United States leads this field in many scientific areas. However, Canada has particular strengths in DFT methods and homogeneous catalysis; Europe in heterogeneous catalysis, mesoscale, and materials modeling; and Japan in materials modeling and special-purpose computing. Major government-industry initiatives are underway in Europe and Japan, notably in multi-scale materials modeling and in development of chemistry-capable ab-initio molecular dynamics codes.

  3. Gas Phase Molecular Dynamics

    International Nuclear Information System (INIS)

    Hall, G.E.; Prrese, J.M.; Sears, T.J.; Weston, R.E.

    1999-01-01

    The goal of this research is the understanding of elementary chemical and physical processes important in the combustion of fossil fuels. Interest centers on reactions involving short-lived chemical intermediates and their properties. High-resolution high-sensitivity laser absorption methods are augmented by high temperature flow-tube reaction kinetics studies with mass spectrometric sampling. These experiments provide information on the energy levels, structures and reactivity of molecular flee radical species and, in turn, provide new tools for the study of energy flow and chemical bond cleavage in the radicals in chemical systems. The experimental work is supported by theoretical and computational work using time-dependent quantum wave packet calculations that provide insights into energy flow between the vibrational modes of the molecule

  4. Molecular genetics in neurology.

    Science.gov (United States)

    Martin, J B

    1993-12-01

    There has been remarkable progress in the identification of mutations in genes that cause inherited neurological disorders. Abnormalities in the genes for Huntington disease, neurofibromatosis types 1 and 2, one form of familial amyotrophic lateral sclerosis, fragile X syndrome, myotonic dystrophy, Kennedy syndrome, Menkes disease, and several forms of retinitis pigmentosa have been elucidated. Rare disorders of neuronal migration such as Kallmann syndrome, Miller-Dieker syndrome, and Norrie disease have been shown to be due to specific gene defects. Several muscle disorders characterized by abnormal membrane excitability have been defined as mutations of the muscle sodium or chloride channels. These advances provide opportunity for accurate molecular diagnosis of at-risk individuals and are the harbinger of new approaches to therapy of these diseases.

  5. Molecular mechanisms in gliomagenesis

    DEFF Research Database (Denmark)

    Hulleman, Esther; Helin, Kristian

    2005-01-01

    Glioma, and in particular high-grade astrocytoma termed glioblastoma multiforme (GBM), is the most common primary tumor of the brain. Primarily because of its diffuse nature, there is no effective treatment for GBM, and relatively little is known about the processes by which it develops. Therefore......, in order to design novel therapies and treatments for GBM, research has recently intensified to identify the cellular and molecular mechanisms leading to GBM formation. Modeling of astrocytomas by genetic manipulation of mice suggests that deregulation of the pathways that control gliogenesis during normal...... brain development, such as the differentiation of neural stem cells (NSCs) into astrocytes, might contribute to GBM formation. These pathways include growth factor-induced signal transduction routes and processes that control cell cycle progression, such as the p16-CDK4-RB and the ARF-MDM2-p53 pathways...

  6. Atomic and molecular sciences

    International Nuclear Information System (INIS)

    Lane, N.F.

    1989-01-01

    The theoretical atomic and molecular physics program at Rice University addresses basic questions about the collision dynamics of electrons, atoms, ions and molecules, emphasizing processes related to possible new energy technologies and other applications. The program focuses on inelastic collision processes that are important in understanding energy and ionization balance in disturbed gases and plasmas. Emphasis is placed on systems and processes where some experimental information is available or where theoretical results may be expected to stimulate new measurements. Examples of current projects include: excitation and charge-transfer processes; orientation and alignment of excited states following collisions; Rydberg atom collisions with atoms and molecules; Penning ionization and ion-pair formation in atom-atom collisions; electron-impact ionization in dense, high-temperature plasmas; electron-molecule collisions; and related topics

  7. Atomic and molecular manipulation

    CERN Document Server

    Mayne, Andrew J

    2011-01-01

    Work with individual atoms and molecules aims to demonstrate that miniaturized electronic, optical, magnetic, and mechanical devices can operate ultimately even at the level of a single atom or molecule. As such, atomic and molecular manipulation has played an emblematic role in the development of the field of nanoscience. New methods based on the use of the scanning tunnelling microscope (STM) have been developed to characterize and manipulate all the degrees of freedom of individual atoms and molecules with an unprecedented precision. In the meantime, new concepts have emerged to design molecules and substrates having specific optical, mechanical and electronic functions, thus opening the way to the fabrication of real nano-machines. Manipulation of individual atoms and molecules has also opened up completely new areas of research and knowledge, raising fundamental questions of "Optics at the atomic scale", "Mechanics at the atomic scale", Electronics at the atomic scale", "Quantum physics at the atomic sca...

  8. Molecular Interactions at Membranes

    DEFF Research Database (Denmark)

    Jagalski, Vivien

    . Today, we know more than ever before about the properties of biological membranes. Advanced biophysical techniques and sophisticated membrane models allow us to answer specific questions about the structure of the components within membranes and their interactions. However, many detailed structural...... the surface-immobilization of LeuT by exchanging the detergent with natural phosphatidylcholine (PC) lipids. Various surface sensitive techniques, including neutron reflectometry (NR), are employed and finally enabled us to confirm the gross structure of LeuT in a lipid environment as predicted by molecular...... dynamic simulations. In a second study, the co-localization of three toxic plant-derived diterpene resin acids (RAs) within DPPC membranes was investigated. These compounds are reported to disrupt the membrane and increase its fluidity. The RAs used in this study vary in their toxicity while...

  9. Molecular mechanisms of carcinogenesis

    International Nuclear Information System (INIS)

    Hall, E.J.

    1997-01-01

    The possibility that chromosomal changes are responsible for neoplasia was proposed in the early years of this century. A combination of improved cytogenetics and the advent of recombinant technology has settled the issue. As recently as 20 years ago, however, the genetic and molecular basis of familiar predisposition to cancer were a mystery, and it is only in the last few years that light has been shed on a few specific types of malignancies. As the genetic basis of human cancer had been documented, a number of genes have been identified as functioning either as oncogenes which act in a dominant fashion to promote tumor growth when mutated, or as tumor suppressor genes which act in a recessive fashion

  10. Molecular genetics of craniosynostosis

    Science.gov (United States)

    Caterine; Auerkari, Elza Ibrahim

    2018-03-01

    Tight regulation process and complex interplay occur along the osteogenic interfaces of the cranial sutures in normal growth and development of the skull. Cranial sutures serve as sites of bone growth while maintaining a state of patency to accommodate the developing brain. Cranial sutures are fibro-cellular structures that separate the rigid plates of the skull bones. Premature fusion of one or more cranial sutures leads to a condition known as craniosynostosis. Craniosynostosis is one of the most common craniofacial anomalies with a prevalence of 1 in 2,500 newborns. Several genes have been identified in the pathogenesis of craniosynostosis. Molecular signaling events and the intracellular signal transduction pathways implicated in the suture pathobiology will provide a useful approach for therapeutic targeting.

  11. Molecular imaging II

    International Nuclear Information System (INIS)

    Semmler, Wolfhard; Schwaiger, Markus

    2008-01-01

    The aim of this textbook of molecular imaging is to provide an up to date review of this rapidly growing field and to discuss basic methodological aspects necessary for the interpretation of experimental and clinical results. Emphasis is placed on the interplay of imaging technology and probe development, since the physical properties of the imaging approach need to be closely linked with the biologic application of the probe (i.e. nanoparticles and microbubbles). Various chemical strategies are discussed and related to the biologic applications. Reporter-gene imaging is being addressed not only in experimental protocols, but also first clinical applications are discussed. Finally, strategies of imaging to characterize apoptosis and angiogenesis are described and discussed in the context of possible clinical translation. (orig.)

  12. Molecular dynamics simulations

    International Nuclear Information System (INIS)

    Alder, B.J.

    1985-07-01

    The molecular dynamics computer simulation discovery of the slow decay of the velocity autocorrelation function in fluids is briefly reviewed in order to contrast that long time tail with those observed for the stress autocorrelation function in fluids and the velocity autocorrelation function in the Lorentz gas. For a non-localized particle in the Lorentz gas it is made plausible that even if it behaved quantum mechanically its long time tail would be the same as the classical one. The generalization of Fick's law for diffusion for the Lorentz gas, necessary to avoid divergences due to the slow decay of correlations, is presented. For fluids, that generalization has not yet been established, but the region of validity of generalized hydrodynamics is discussed. 20 refs., 5 figs

  13. Electrical properties of molecular crystals

    International Nuclear Information System (INIS)

    Barraud, A.

    1968-01-01

    This literature survey summarizes the electrical properties of molecular crystals: molecular crystal structure, transport and excitation mechanisms of charge-carriers, and differences compared to inorganic semi-conductors. The main results concerning the electrical conductivity of the most-studied molecular crystals are presented, together with the optical and photo-electrical properties of these crystals. Finally the different types of electrical measurements used are reviewed, as well as the limits of each method. (author) [fr

  14. Molecular machines open cell membranes.

    Science.gov (United States)

    García-López, Víctor; Chen, Fang; Nilewski, Lizanne G; Duret, Guillaume; Aliyan, Amir; Kolomeisky, Anatoly B; Robinson, Jacob T; Wang, Gufeng; Pal, Robert; Tour, James M

    2017-08-30

    Beyond the more common chemical delivery strategies, several physical techniques are used to open the lipid bilayers of cellular membranes. These include using electric and magnetic fields, temperature, ultrasound or light to introduce compounds into cells, to release molecular species from cells or to selectively induce programmed cell death (apoptosis) or uncontrolled cell death (necrosis). More recently, molecular motors and switches that can change their conformation in a controlled manner in response to external stimuli have been used to produce mechanical actions on tissue for biomedical applications. Here we show that molecular machines can drill through cellular bilayers using their molecular-scale actuation, specifically nanomechanical action. Upon physical adsorption of the molecular motors onto lipid bilayers and subsequent activation of the motors using ultraviolet light, holes are drilled in the cell membranes. We designed molecular motors and complementary experimental protocols that use nanomechanical action to induce the diffusion of chemical species out of synthetic vesicles, to enhance the diffusion of traceable molecular machines into and within live cells, to induce necrosis and to introduce chemical species into live cells. We also show that, by using molecular machines that bear short peptide addends, nanomechanical action can selectively target specific cell-surface recognition sites. Beyond the in vitro applications demonstrated here, we expect that molecular machines could also be used in vivo, especially as their design progresses to allow two-photon, near-infrared and radio-frequency activation.

  15. Molecular studies by electron spectroscopy

    International Nuclear Information System (INIS)

    Hansteen, J.M.

    1977-01-01

    Experience gained in experimental nuclear physics has played a large role in the development of electron spectroscopy as a powerful tool for studying chemical systems. The use of ESCA (Electron Spectroscopy for Chemical Analysis) for the mapping of molecular properties connected with inner as well as outer electron shells is reviewed, mainly from a phenomological point of view. Molecular Auger electron spectroscopy is described as a means of gaining information on details in molecular structure, simultaneously being extensively applied for surface studies. Future highly promising research areas for molecular electron spectroscopy are suggested to be (e,2e) processes as well as continued exploitation of synchrotron radiation from high energy nuclear devices. (Auth.)

  16. Molecular machines open cell membranes

    Science.gov (United States)

    García-López, Víctor; Chen, Fang; Nilewski, Lizanne G.; Duret, Guillaume; Aliyan, Amir; Kolomeisky, Anatoly B.; Robinson, Jacob T.; Wang, Gufeng; Pal, Robert; Tour, James M.

    2017-08-01

    Beyond the more common chemical delivery strategies, several physical techniques are used to open the lipid bilayers of cellular membranes. These include using electric and magnetic fields, temperature, ultrasound or light to introduce compounds into cells, to release molecular species from cells or to selectively induce programmed cell death (apoptosis) or uncontrolled cell death (necrosis). More recently, molecular motors and switches that can change their conformation in a controlled manner in response to external stimuli have been used to produce mechanical actions on tissue for biomedical applications. Here we show that molecular machines can drill through cellular bilayers using their molecular-scale actuation, specifically nanomechanical action. Upon physical adsorption of the molecular motors onto lipid bilayers and subsequent activation of the motors using ultraviolet light, holes are drilled in the cell membranes. We designed molecular motors and complementary experimental protocols that use nanomechanical action to induce the diffusion of chemical species out of synthetic vesicles, to enhance the diffusion of traceable molecular machines into and within live cells, to induce necrosis and to introduce chemical species into live cells. We also show that, by using molecular machines that bear short peptide addends, nanomechanical action can selectively target specific cell-surface recognition sites. Beyond the in vitro applications demonstrated here, we expect that molecular machines could also be used in vivo, especially as their design progresses to allow two-photon, near-infrared and radio-frequency activation.

  17. Molecular pathology and thyroid FNA.

    Science.gov (United States)

    Poller, D N; Glaysher, S

    2017-12-01

    This review summarises molecular pathological techniques applicable to thyroid FNA. The molecular pathology of thyroid tumours is now fairly well understood. Molecular methods may be used as a rule-in test for diagnosis of malignancy in thyroid nodules, eg BRAF V600E point mutation, use of a seven-gene mutational panel (BRAF V600E, RAS genes, RET/PTC or PAX8/PPARG rearrangement), or as a comprehensive multigene next-generation sequencing panel, eg ThyroSeq v2. Molecular methods can also be applied as rule-out tests for malignancy in thyroid nodules, eg Afirma or ThyroSeq v2 or as markers of prognosis, eg TERT promoter mutation or other gene mutations including BRAF V600E, TP53 and AKT1, and as tests for newly defined tumour entities such as non-invasive follicular thyroid neoplasm with papillary like nuclei, or as a molecular marker(s) for targeted therapies. This review describes practical examples of molecular techniques as applied to thyroid FNA in routine clinical practice and the value of molecular diagnostics in thyroid FNA. It describes the range of molecular abnormalities identified in thyroid nodules and thyroid cancers with some practical applications of molecular methods to diagnosis and prognosis of thyroid nodules and thyroid cancer. © 2017 John Wiley & Sons Ltd.

  18. Entre nous.

    Directory of Open Access Journals (Sweden)

    Boris Beaude

    2005-04-01

    Full Text Available Skype n’est pas un site mais un logiciel. Ce logiciel est tellement représentatif de la dynamique actuelle d’Internet qu’il mérite une attention particulière. Créé par les fondateurs de Kaaza, le logiciel de P2P ( Peer To Peer qui fut aussi contesté que célèbre (plusieurs millions d’utilisateurs, Skype se présente comme un logiciel de téléphonie permettant à ses utilisateurs de téléphoner par Internet. L’idée n’est pas nouvelle et pourtant, seule cette ...

  19. Analogías y diferencias entre el arte rupestre de las Hurdes y el del Valle del Tajo

    Directory of Open Access Journals (Sweden)

    María Carmen SEVILLANO SAN JOSÉ

    2009-10-01

    Full Text Available Este trabajo es un pequeño ensayo metodológico de comparación entre 2 núcleos de arte rupestre muy cercanos entre sí, pero muy distantes en cuanto a representaciones temáticas y a cronología.

  20. Comportamento saudável entre adultos jovens no Brasil Comportamiento saludable entre adultos jóvenes en Brasil, 2006 Healthy behavior among Brazilian young adults

    Directory of Open Access Journals (Sweden)

    Sandhi Maria Barreto

    2009-11-01

    Full Text Available OBJETIVO: Estimar a prevalência de características associadas a comportamentos saudáveis em jovens. MÉTODOS: Foram analisados dados de 14.193 indivíduos com idades entre 18 e 29 anos, referentes ao sistema de Vigilância de Fatores de Risco e Proteção para Doenças Crônicas por Inquérito Telefônico (VIGITEL, realizado nas 27 capitais brasileiras em 2006. Foi considerado saudável quem não fuma, pratica atividade física regular e consome frutas/hortaliças cinco ou mais dias na semana. Foi analisada associação entre comportamento saudável com variáveis sociodemográficas e indicadores de saúde. A análise dos dados baseou-se na razão de prevalência obtida por regressão de Poisson. RESULTADOS: A prevalência de jovens saudáveis foi de 8,0%; 39,6% relataram dois comportamentos saudáveis, 45,3% relataram um, e 7,0% nenhum. Na análise multivariada, o comportamento saudável foi mais freqüente entre participantes com 25-29 anos, escolaridade maior que nove anos de estudo e que relataram haver local para praticar esportes próximo à residência. A freqüência de comportamento saudável foi significativamente menor entre participantes que relataram cor de pele parda ou preta, consumo de leite integral e de carne vermelha ou frango com gordura, estar em dieta e autopercepção da saúde como ruim. CONCLUSÕES: Indivíduos com menos comportamentos saudáveis percebem sua saúde como ruim, sugerindo que estes comportamentos influenciam negativamente a percepção da própria saúde. O fato de jovens mais saudáveis terem maior escolaridade, serem de cor branca e morarem próximo a local para praticar esportes sugere desigualdades no acesso a práticas saudáveis.OBJETIVO: Estimar la prevalencia de características asociadas a comportamientos saludables en jóvenes. MÉTODOS: Fueron analizados datos de 14.193 individuos con edades entre 18 y 29 años, referentes al Sistema de Vigilancia de Factores de Riesgo y Protección para

  1. La relación entre los juegos de viodeo violentos, la aculturación y la agresión entre adolescentes latinos

    Directory of Open Access Journals (Sweden)

    S Liliana Escobar-Chaves

    2002-12-01

    Full Text Available Múltiples factores están relacionados con el comportamiento agresivo. El propósito de este estudio fue evaluar dos hipótesis: 1 estudiantes latinos de sexto a octavo grado expuestos a numerosas horas de juegos de video mostraran altos niveles de agresión y pelearan mas comparados con los estudiantes expuestos a menos horas de juego de video y, 2 mientras más aculturados sean los estudiantes latinos de sexto a octavo grado, mas tiempo pasarán jugando juegos de video y preferirán más los juegos de video violentos en comparación con los estudiantes menos aculturados. Este estudio incluye 5.831 estudiantes de ocho escuelas públicas de Houston, Texas. Se observó una relación lineal entre la cantidad de tiempo invertido en juegos de videos y los puntajes en la escala de agresión. Se encontró una asociación positiva y estadísticamente significativa entre los puntajes más altos en la escala de agresión y la cantidad de tiempo que los estudiantes indicaron jugar juegos de video. Esta asociación fue positiva tanto para ambos sexos (p

  2. Relaciones entre organizaciones y stakeholders: necesidad de una interacción mutua entre los diversos grupos de interés

    Directory of Open Access Journals (Sweden)

    Jorge Suárez Tirado

    2007-12-01

    Full Text Available En este ensayo intentaré explicar las relaciones y los riesgos existentes entre organizaciones y stakeholders (grupos de interés; adicionalmente, realizaré algunas observaciones al enfoque clásico planteado por Milton Friedman, sin el ánimo de entrar a explicar las características del entorno económico, político y social de la época (1970, e intentaré argumentar que en las circunstancias actuales (niveles de pobreza, aumento en la brecha social, problemas medioambientales, etc., las empresas tienen compromisos con los stakeholders y con la comunidad en general, que van más allá de la generación de utilidades para los propietarios. Posteriormente presentaré de una forma muy breve algunas herramientas que permiten comunicar el impacto de la empresa sobre la sociedad y en particular sobre los diversos stakeholders, como lo son las cuentas de excedente y el balance social que se constituyen en la principal herramienta de comunicación entre la empresa y los diversos grupos de interés o stakeholders

  3. Thermally driven molecular linear motors - A molecular dynamics study

    DEFF Research Database (Denmark)

    Zambrano, Harvey A; Walther, Jens Honore; Jaffe, Richard Lawrence

    2009-01-01

    We conduct molecular dynamics simulations of a molecular linear motor consisting of coaxial carbon nanotubes with a long outer carbon nanotube confining and guiding the motion of an inner short, capsule-like nanotube. The simulations indicate that the motion of the capsule can be controlled by th...

  4. Bienvenida la Medicina Molecular

    Directory of Open Access Journals (Sweden)

    Orlando R. Serrano-Barrera

    2015-11-01

    Full Text Available No ha cambiado la medicina, sino que ha avanzado. Los métodos clínico-epidemiológicos  incluyen hoy y se benefician del conocimiento de las bases moleculares del proceso salud-enfermedad, tanto las variaciones individuales, como los caracteres compartidos por comunidades y poblaciones, que las hacen resistentes o vulnerables a una enfermedad. La estimación presintomática e, incluso, prenatal del riesgo de enfermar, el diagnóstico, el pronóstico, la elección del tratamiento más ajustado al paciente, las posibilidades de rehabilitación y reinserción social, la educación y promoción sanitarias son todos momentos del proceso de toma de decisiones, que el médico debe asumir en el nuevo escenario de una ciencia que ha logrado discernir las implicaciones de un número creciente de moléculas, sus variantes, sus formas mutadas y sus interacciones con otras moléculas y con factores ambientales. (1 ¿Cuán lejos está tal panorama de nuestra práctica clínica? También en nuestros escenarios se hace medicina molecular. Así ha sido desde que en 1949 Pauling catalogara la primera enfermedad molecular: la anemia drepanocítica. (2 La más temprana acción de prevención, la vacunación, se realiza a diario en las áreas de salud e incluye preparados conformados por moléculas obtenidas por vía recombinante o síntesis química, como el antígeno de superficie del virus de la hepatitis B y el polisacárido de membrana del Haemophilus influenzae, respectivamente. (3 La pesquisa poblacional de cáncer de próstata, enfocado hacia los hombres mayores de 50 años o con síntomas sugestivos, se auxilia de la cuantificación en sangre del antígeno prostático específico. (4 El tratamiento del infarto agudo del miocardio, ahora la segunda causa de muerte en Cuba, incluye la trombolisis con estreptocinasa, otra biomolécula recombinante. (5 En desarrollo, en etapa de ensayos clínicos o ya como productos registrados algunas vacunas terap

  5. The Fast-Casual Conundrum: Fast-Casual Restaurant Entrées Are Higher in Calories than Fast Food.

    Science.gov (United States)

    Schoffman, Danielle E; Davidson, Charis R; Hales, Sarah B; Crimarco, Anthony E; Dahl, Alicia A; Turner-McGrievy, Gabrielle M

    2016-10-01

    Frequently eating fast food has been associated with consuming a diet high in calories, and there is a public perception that fast-casual restaurants (eg, Chipotle) are healthier than traditional fast food (eg, McDonald's). However, research has not examined whether fast-food entrées and fast-casual entrées differ in calorie content. The purpose of this study was to determine whether the caloric content of entrées at fast-food restaurants differed from that found at fast-casual restaurants. This study was a cross-sectional analysis of secondary data. Calorie information from 2014 for lunch and dinner entrées for fast-food and fast-casual restaurants was downloaded from the MenuStat database. Mean calories per entrée between fast-food restaurants and fast-casual restaurants and the proportion of restaurant entrées that fell into different calorie ranges were assessed. A t test was conducted to test the hypothesis that there was no difference between the average calories per entrée at fast-food and fast-casual restaurants. To examine the difference in distribution of entrées in different calorie ranges between fast-food and fast-casual restaurants, χ(2) tests were used. There were 34 fast-food and 28 fast-casual restaurants included in the analysis (n=3,193 entrées). Fast-casual entrées had significantly more calories per entrée (760±301 kcal) than fast-food entrées (561±268; Prestaurants to determine whether the energy content or nutrient density of full meals (ie, entrées with sides and drinks) differs between fast-casual restaurants and fast-food restaurants. Calorie-conscious consumers should consider the calorie content of entrée items before purchase, regardless of restaurant type. Copyright © 2016 Academy of Nutrition and Dietetics. Published by Elsevier Inc. All rights reserved.

  6. Molecular digital pathology: progress and potential of exchanging molecular data.

    Science.gov (United States)

    Roy, Somak; Pfeifer, John D; LaFramboise, William A; Pantanowitz, Liron

    2016-09-01

    Many of the demands to perform next generation sequencing (NGS) in the clinical laboratory can be resolved using the principles of telepathology. Molecular telepathology can allow facilities to outsource all or a portion of their NGS operation such as cloud computing, bioinformatics pipelines, variant data management, and knowledge curation. Clinical pathology laboratories can electronically share diverse types of molecular data with reference laboratories, technology service providers, and/or regulatory agencies. Exchange of electronic molecular data allows laboratories to perform validation of rare diseases using foreign data, check the accuracy of their test results against benchmarks, and leverage in silico proficiency testing. This review covers the emerging subject of molecular telepathology, describes clinical use cases for the appropriate exchange of molecular data, and highlights key issues such as data integrity, interoperable formats for massive genomic datasets, security, malpractice and emerging regulations involved with this novel practice.

  7. Comportamentos em saúde entre idosos hipertensos, Brasil, 2006 Comportamientos en salud entre ancianos hipertensos, Brasil, 2006 Health behaviors among older adults with hypertension, Brazil, 2006

    Directory of Open Access Journals (Sweden)

    Maria Fernanda Furtado de Lima e Costa

    2009-11-01

    Full Text Available OBJETIVO: Estimar as prevalências de comportamentos prejudiciais à saúde e de outros fatores de risco cardiovascular entre idosos com hipertensão auto-referida e comparando-as com de não-hipertensos. MÉTODOS: Foram utilizados dados do sistema de Vigilância de Fatores de Risco e Proteção para Doenças Crônicas por Inquérito Telefônico (VIGITEL, referentes aos 9.038 idosos residentes em domicílios com pelo menos uma linha telefônica fixa nas 26 capitais brasileiras e no Distrito Federal em 2006. RESULTADOS: A prevalência de hipertensão auto-referida foi de 55% (IC 95%: 53;57. A maioria dos hipertensos apresentava concomitância de três ou mais fatores de risco (69%; IC 95%: 67;71. Foram observadas altas prevalências de atividades físicas insuficientes no lazer (88%; IC 95%: 86;89 e do consumo de frutas e hortaliças inferior a cinco porções diárias (90%; IC 95%: 88;90 entre hipertensos, seguidas pela adição de sal aos alimentos (60%; IC 95%: 57;63, consumo habitual de carnes gordurosas (23%; IC 95%: 21;25, tabagismo (9%; IC 95%: 7;10 e consumo abusivo de álcool (3%; IC 95%: 2;4. Essas prevalências foram semelhantes às observadas entre não hipertensos (p >0,05, exceto tabagismo. A prevalência do tabagismo foi menor entre hipertensos (razão de prevalência ajustada [RPA] = 0,75; IC 95%: 0,64;0,89 e as prevalências de sobrepeso (RPA= 1,37; IC 95%: 1,25;1,49, dislipidemia (RPA 1,36; IC 95%: 1,26;1,36 e diabetes (RPA= 1,37; IC 95%: 1,27;1,37 foram mais altas. CONCLUSÕES: Os resultados sugerem que, exceto tabagismo, os comportamentos prejudiciais à saúde entre idosos persistem após o diagnóstico da hipertensão arterial.OBJETIVO: Estimar las prevalencias de factores de riesgo de comportamientos y otros factores de riesgo cardiovascular entre ancianos con hipertensión auto-referida, comparándolas con las de no hipertensos. MÉTODOS: Fueron utilizados datos del Sistema de Vigilancia de Factores de Riesgo y Protecci

  8. Diferenciais socioeconômicos e de saúde entre duas comunidades de idosos longevos

    Directory of Open Access Journals (Sweden)

    Idiane Rosset

    2011-04-01

    Full Text Available OBJETIVO: Identificar diferenciais demográficos e socioeconômicos relacionados ao estado de saúde de idosos mais velhos residentes em duas cidades de regiões diferentes do Brasil. MÉTODOS: Estudo epidemiológico transversal e comparativo de idosos mais velhos (> 80 anos residentes em Ribeirão Preto (RP-SP e Caxias do Sul (CS-RS, com amostra probabilística de 117 sujeitos em CS e 155 em RP, realizado entre 2007 e 2008. O instrumento de coleta incluiu dados demográficos e socioeconômicos miniexame do estado mental, Medida de Independência Funcional, número de comorbidades auto-referidas e Escala de Depressão Geriátrica. RESULTADOS: A idade média foi similar, com predominância de mulheres (~70% e viúvos (~60% em ambos os municípios. A escolaridade média não diferiu estatisticamente, mas a renda média do idoso foi maior em RP do que em CS (p = 0,05. RP apresentou maior concentração de indivíduos nos extremos de escolaridade e renda do que CS. O escore médio do miniexame do estado mental foi similar entre os dois grupos e maior para indivíduos do sexo masculino, com idade entre 80 e 84 anos, casados e com maior escolaridade. Observou-se melhor desempenho funcional entre idosos de 80 a 84 anos em ambos os municípios, entre os de maior escolaridade em RP; e entre os do sexo masculino e os casados em CS. Idosos de CS apresentaram maior número de comorbidades do que os de RP (p < 0,001. Idosos do sexo masculino, casados e com maior renda apresentaram menos sintomas depressivos em ambos os grupos; os de RP apresentaram maior escore na Escala de Depressão Geriátrica do que os de CS (p < 0,001. CONCLUSÕES: Embora os idosos de CS apresentem menor desigualdade socioeconômica e menos sintomas depressivos, possuem também maior número médio de comorbidades e menor nível de independência funcional, quando comparados aos de RP.

  9. Relação entre ansiedade, depressão e desesperança entre grupos de idosos Relación entre ansiedad, depresión y desesperanza entre grupos de ancianos Relations between anxiety, depression and hopelessness among elderly groups

    Directory of Open Access Journals (Sweden)

    Katya Luciane de Oliveira

    2006-08-01

    Full Text Available O envelhecimento é uma etapa da vida que permanece pouco conhecida e estudada, se comparada a outras fases do desenvolvimento humano. Nesta pesquisa buscou-se explorar a relação entre ansiedade, depressão e desesperança entre grupos de idosos. Participaram deste estudo 79 idosos provenientes de centro do terceira idade de um posto de retirada de medicamentos e de uma instituição asilar. Utilizou-se um questionário para os dados de caracterização dos idosos, bem como as escalas Beck para mensurar sintomas de ansiedade, depressão e desesperança. Os resultados evidenciaram relação estatisticamente significativa entre ansiedade, depressão e desesperança nos idosos. O grupo de asilares apresentou uma maior incidência de sintomas ansiosos, depressivos e desesperançosos em relação aos outros dois grupos.El envejecimiento es una etapa de la vida que permanece poco conocida o estudiada, al ser comparada a otras fases del desarrollo humano. Esta investigación buscó explorar la relación entre ansiedad, depresión y desesperanza entre grupos de ancianos. Participaron en este estudio 79 adultos mayores provenientes de tres sitios diferentes: un centro de tercera edad, un puesto de retirada de medicinas y un asilo. Un cuestionario para los datos de caracterización de los ancianos fue utilizado, así como las escalas Beck para mensurar síntomas de ansiedad, depresión y desesperanza. Los resultados dejaron en evidencia relación estadísticamente significativa entre dichos síntomas en los adultos mayores. El grupo proveniente del asilo presentó mayor incidencia de manifestaciones en relación con los demás grupos.Aging is a life stage that remains hardly ever studied and, consequently, unknown if compared to other human development phases. This research investigates the relation between anxiety, depression and hopelessness among elderly groups. 79 elderly people, from three different units, such as a 'third-age-center', a center of

  10. Vacinação contra a hepatite B entre cirurgiões dentistas

    Directory of Open Access Journals (Sweden)

    Martins Andréa Maria Eleutério de Barros Lima

    2003-01-01

    Full Text Available OBJETIVO: Inquéritos sorológicos realizados em diversos países mostraram uma maior prevalência da infecção pelo vírus da hepatite B (VHB em dentistas, especialmente entre os cirurgiões, do que na população geral. O estudo realizado objetivou determinar a prevalência e os fatores associados à vacinação contra hepatite B (HB entre os dentistas e investigar as principais razões alegadas para a não vacinação e vacinação incompleta. MÉTODOS: Foi conduzido um inquérito entre 299 cirurgiões dentistas residentes em Montes Claros, MG, por meio de questionário auto-aplicável. Foi determinada a prevalência de vacinação segundo o número de doses e os fatores associados à não vacinação e à vacinação incompleta através de regressão logística multinomial. RESULTADOS: Dos 299 questionários distribuídos, 296 (99% foram respondidos. Destes, 74,9% tomaram três doses; 14%, duas doses; 2%, uma dose e 10% não foram vacinados. A vacinação completa foi maior entre os que relataram fazer exclusivamente cirurgia e/ou periodontia (89%. A principal razão alegada para a não vacinação ou vacinação incompleta foi a necessitade de maiores informações. A não vacinação foi mais freqüente entre aqueles com mais de 40 anos (OR=8,62; IC 95%: 1,88-39,41 e os que não se reciclaram nos dois anos prévios ao inquérito (OR=2,72; IC 95%: 1,02-7,22. A vacinação incompleta foi maior entre os que não usam luva no trabalho (OR=2,32; IC 95%: 1,08-4,97. CONCLUSÃO: A falta de informação, possivelmente relacionada a menor reciclagem profissional, parece ser um dos principais fatores limitantes da vacinação.

  11. Análise de distância genética entre acessos do gênero Psidium via marcadores ISSR

    Directory of Open Access Journals (Sweden)

    Názila Nayara Silva de Oliveira

    2014-12-01

    Full Text Available O objetivo deste trabalho foi avaliar a distância genética entre 37 acessos da espécie cultivada Psidium guajava, L. (goiaba e de araçás do gênero Psidium do banco de germoplasma da Universidade Estadual do Norte Fluminense (UENF, via marcadores moleculares ISSR. Nos 17 marcadores selecionados, foram obtidas 216 bandas polimórficas. Pelo método de agrupamento UPGMA, houve a formação de cinco principais grupos. Os acessos de araçá da espécie P. cattleyanum Sabine , ficaram alocados nos grupos I e II. No grupo II, foi observada, dentro da espécie P cattleyanum, maior proximidade com a goiabeira. No grupo III, ficou alocado o acesso da espécie P. guineense Sw (araçá-do-campo e dentre os araçás, foi o que ficou mais próximo da goiaba. Os genótipos de goiabeira ficaram alocados do grupo IV e V, confirmando sua alta divergência. Os marcadores moleculares foram eficientes em estimar a distância genética intra e interespecífica.

  12. Associação entre tamanho e potencial proliferativo em neurinomas do acústico Size and proliferative index correlation in acoustic neuromas

    Directory of Open Access Journals (Sweden)

    Oswaldo Inácio de Tella

    2006-03-01

    Full Text Available Schwanomas do acústico são os tumores mais freqüentes localizados no ângulo pontocerebelar. Os mecanismos moleculares que levam a sua geração e crescimento ainda não são bem conhecidos. Várias características clínicas, radiológicas e imuno-histoquímicas já foram estudadas e correlacionadas ao crescimento tumoral. Estudamos e correlacionamos aspectos clínicos e imuno-histoquímicos (MIB-1 de 11 schwanomas do acústico operados no Hospital São Paulo/UNIFESP. O tamanho dos tumores correlacionou-se com o índice proliferativo (Ki-67, não havendo correlação com significância estatística entre a idade dos pacientes, duração dos sintomas e índice proliferativo.Acoustic neuromas are the most common tumors in the cerebellopontine angle. The molecular mechanisms involved in generation and growth of these tumors are not completly elucidated. Many radiological, clinic and imunohistochemystry data were correlated to tumor growth. We studied 11 acoustic neuromas surgically treated at Hospital São Paulo/Unifesp and correlated clinical and radiological data with proliferative index (Ki-67. The size of the tumors were positively correlationated with proliferative index. No other correlation had statistic significativity.

  13. HIV Molecular Immunology 2015

    Energy Technology Data Exchange (ETDEWEB)

    Yusim, Karina [Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Theoretical Division; Korber, Bette Tina [Los Alamos National Lab. (LANL), Los Alamos, NM (United States). Theoretical Division; Brander, Christian [Institucio Catalana de Recerca i Estudis Avancats (ICREA), Barcelona (Spain); Barouch, Dan [Beth Israel Deaconess Medical Center, Boston, MA (United States). Division of Vaccine Research; de Boer, Rob [Utrecht University, Utrecht (Netherlands). Faculty of Biology; Haynes, Barton F. [Duke Univ., Durham, NC (United States). Duke Human Vaccine Institute and Departments of Medicine, Surgery and Immunology; Koup, Richard [National Inst. of Health (NIH), Bethesda, MD (United States). Vaccine Research Center; Moore, John P. [Cornell Univ., Ithaca, NY (United States). Weill Medical College; Walker, Bruce D. [Ragon Institute, Cambridge, MA (United States); Watkins, David [Wisconsin Regional Primate Research Center, Madison, WI (United States)

    2016-04-05

    The scope and purpose of the HIV molecular immunology database: HIV Molecular Immunology is a companion volume to HIV Sequence Compendium. This publication, the 2015 edition, is the PDF version of the web-based HIV Immunology Database (http://www.hiv.lanl.gov/ content/immunology/). The web interface for this relational database has many search options, as well as interactive tools to help immunologists design reagents and interpret their results. In the HIV Immunology Database, HIV-specific B-cell and T-cell responses are summarized and annotated. Immunological responses are divided into three parts, CTL, T helper, and antibody. Within these parts, defined epitopes are organized by protein and binding sites within each protein, moving from left to right through the coding regions spanning the HIV genome. We include human responses to natural HIV infections, as well as vaccine studies in a range of animal models and human trials. Responses that are not specifically defined, such as responses to whole proteins or monoclonal antibody responses to discontinuous epitopes, are summarized at the end of each protein section. Studies describing general HIV responses to the virus, but not to any specific protein, are included at the end of each part. The annotation includes information such as cross-reactivity, escape mutations, antibody sequence, TCR usage, functional domains that overlap with an epitope, immune response associations with rates of progression and therapy, and how specific epitopes were experimentally defined. Basic information such as HLA specificities for T-cell epitopes, isotypes of monoclonal antibodies, and epitope sequences are included whenever possible. All studies that we can find that incorporate the use of a specific monoclonal antibody are included in the entry for that antibody. A single T-cell epitope can have multiple entries, generally one entry per study. Finally, maps of all defined linear epitopes relative to the HXB2 reference proteins

  14. moleculares de insectos (Drosophila y de primates

    Directory of Open Access Journals (Sweden)

    Enio Hernández Aguirre

    2006-01-01

    Full Text Available La mayoría de las especies poseen un macho heterogamético XY y una hembra homogamética XX. En el macho XY sólo se conservan unas regiones donde se intercambian información entre el X y el Y (Xpter y Ypter durante la meiosis, que se le llama región seudoautosómica (RSA. Se ha planteado la hipótesis que el cromosoma Y se deriva del cromosoma X, y que antiguamente eran homólogos en toda su extensión. Un posible mecanismo biológico implicado en este proceso evolutivo son fragmentos de ADN que pueden moverse a través del genoma. En general se llaman elementos genéticos móviles. Con base en los elementos génicos móviles y en los genes de la cutícula larval (Lcp se han realizado estudios en los cromosomas sexuales de Drosophila melanogaster, D. Permisilis, D. Seudooscura y D. Miranda. Los análisis moleculares realizados en D. Miranda son una clara evidencia científica de cómo un evento de translocacion cromosómica asociados a procesos biológicos naturales y normales del ADN, como lo es la transposición, pudieron generar un cromosoma “Y” a través de la evolución, que en su forma prístina fue homólogo del cromosoma X.

  15. Optically controllable molecular logic circuits

    International Nuclear Information System (INIS)

    Nishimura, Takahiro; Fujii, Ryo; Ogura, Yusuke; Tanida, Jun

    2015-01-01

    Molecular logic circuits represent a promising technology for observation and manipulation of biological systems at the molecular level. However, the implementation of molecular logic circuits for temporal and programmable operation remains challenging. In this paper, we demonstrate an optically controllable logic circuit that uses fluorescence resonance energy transfer (FRET) for signaling. The FRET-based signaling process is modulated by both molecular and optical inputs. Based on the distance dependence of FRET, the FRET pathways required to execute molecular logic operations are formed on a DNA nanostructure as a circuit based on its molecular inputs. In addition, the FRET pathways on the DNA nanostructure are controlled optically, using photoswitching fluorescent molecules to instruct the execution of the desired operation and the related timings. The behavior of the circuit can thus be controlled using external optical signals. As an example, a molecular logic circuit capable of executing two different logic operations was studied. The circuit contains functional DNAs and a DNA scaffold to construct two FRET routes for executing Input 1 AND Input 2 and Input 1 AND NOT Input 3 operations on molecular inputs. The circuit produced the correct outputs with all possible combinations of the inputs by following the light signals. Moreover, the operation execution timings were controlled based on light irradiation and the circuit responded to time-dependent inputs. The experimental results demonstrate that the circuit changes the output for the required operations following the input of temporal light signals

  16. Structural Molecular Biology 2017 | SSRL

    Science.gov (United States)

    Highlights Training Workshops & Summer Schools Summer Students Structural Molecular Biology Illuminating experimental driver for structural biology research, serving the needs of a large number of academic and — Our Mission The SSRL Structural Molecular Biology program operates as an integrated resource and has

  17. Teaching Molecular Biology with Microcomputers.

    Science.gov (United States)

    Reiss, Rebecca; Jameson, David

    1984-01-01

    Describes a series of computer programs that use simulation and gaming techniques to present the basic principles of the central dogma of molecular genetics, mutation, and the genetic code. A history of discoveries in molecular biology is presented and the evolution of these computer assisted instructional programs is described. (MBR)

  18. Cardiovascular molecular imaging of apoptosis

    International Nuclear Information System (INIS)

    Wolters, S.L.; Reutelingsperger, C.P.M.; Corsten, M.F.; Hofstra, L.; Narula, J.

    2007-01-01

    Molecular imaging strives to visualise processes at the molecular and cellular level in vivo. Understanding these processes supports diagnosis and evaluation of therapeutic efficacy on an individual basis and thereby makes personalised medicine possible. Apoptosis is a well-organised mode of cell suicide that plays a role in cardiovascular diseases (CVD). Apoptosis is associated with loss of cardiomyocytes following myocardial infarction, atherosclerotic plaque instability, congestive heart failure and allograft rejection of the transplanted heart. Thus, apoptosis constitutes an attractive target for molecular imaging of CVD. Our current knowledge about the molecular players and mechanisms underlying apoptosis offers a rich palette of potential molecular targets for molecular imaging. However, only a few have been successfully developed so far. This review highlights aspects of the molecular machinery and biochemistry of apoptosis relevant to the development of molecular imaging probes. It surveys the role of apoptosis in four major areas of CVD and portrays the importance and future perspectives of apoptosis imaging. The annexin A5 imaging protocol is emphasised since it is the most advanced protocol to measure apoptosis in both preclinical and clinical studies. (orig.)

  19. CH2 molecular beam source

    International Nuclear Information System (INIS)

    Porter, R.A.R.; Grosser, A.E.

    1980-01-01

    A molecular beam source of CH 2 is described. Coaxial beams of methylene halide and alkali metal react and the mixture is formed into a molecular beam. Passage through a mechanical velocity selector rotating at a suitably high speed purifies the beam, separating light, fast CH 2 from heavier, slower contaminating species

  20. Molecular Structure of Nucleic Acids

    Indian Academy of Sciences (India)

    Molecular Structure of Nucleic Acids. A Structure for Deoxyribose Nucleic Acid. J. D. Watson and F. H. C. Crick. Medical Research Council Unit for the Study of the Molecular Structure of Biological. Systems, Cavendish Laboratory, Cambridge. April 2. We wish to suggest a structure for the salt of deoxyribose nucleic acid ...

  1. Peltier cooling in molecular junctions

    Science.gov (United States)

    Cui, Longji; Miao, Ruijiao; Wang, Kun; Thompson, Dakotah; Zotti, Linda Angela; Cuevas, Juan Carlos; Meyhofer, Edgar; Reddy, Pramod

    2018-02-01

    The study of thermoelectricity in molecular junctions is of fundamental interest for the development of various technologies including cooling (refrigeration) and heat-to-electricity conversion1-4. Recent experimental progress in probing the thermopower (Seebeck effect) of molecular junctions5-9 has enabled studies of the relationship between thermoelectricity and molecular structure10,11. However, observations of Peltier cooling in molecular junctions—a critical step for establishing molecular-based refrigeration—have remained inaccessible. Here, we report direct experimental observations of Peltier cooling in molecular junctions. By integrating conducting-probe atomic force microscopy12,13 with custom-fabricated picowatt-resolution calorimetric microdevices, we created an experimental platform that enables the unified characterization of electrical, thermoelectric and energy dissipation characteristics of molecular junctions. Using this platform, we studied gold junctions with prototypical molecules (Au-biphenyl-4,4'-dithiol-Au, Au-terphenyl-4,4''-dithiol-Au and Au-4,4'-bipyridine-Au) and revealed the relationship between heating or cooling and charge transmission characteristics. Our experimental conclusions are supported by self-energy-corrected density functional theory calculations. We expect these advances to stimulate studies of both thermal and thermoelectric transport in molecular junctions where the possibility of extraordinarily efficient energy conversion has been theoretically predicted2-4,14.

  2. Molecular motion in restricted geometries

    Indian Academy of Sciences (India)

    Molecular dynamics in restricted geometries is known to exhibit anomalous behaviour. Diffusion, translational or rotational, of molecules is altered significantly on confinement in restricted geometries. Quasielastic neutron scattering (QENS) offers a unique possibility of studying molecular motion in such systems. Both time ...

  3. From Molecular Biology to Biomedicine

    International Nuclear Information System (INIS)

    Salas, M.

    2009-01-01

    From Molecular Biology to Biomedicine. The well known molecular biologist Margarita Salas offered an informative conference at the CSN on progress in these areas since the discovery, more than half a century ago, of the structure of the molecule carrying genetic information, DNA, work that is having an enormous impact in areas such as biomedicine and foodstuff production. (Author)

  4. Dipole plasma in molecular crystals

    International Nuclear Information System (INIS)

    Kotel'nikov, Yu.E.; Kochelaev, B.I.

    1976-01-01

    Collective oscillations in a system of electric dipoles of molecular crystals are investigated. It has been proved in the exciton approximation that in an elementary cell of a molecular crystal with one molecule there may exist energy fluctuations of the ''dipole'' plasma, analogous to plasma oscillations in the charged Fermi liquid

  5. Molecular ecology of aquatic microbes

    Energy Technology Data Exchange (ETDEWEB)

    NONE

    1994-12-31

    Abstracts of reports are presented from a meeting on Molecular Ecology of Aquatic Microbes. Topics included: opportunities offered to aquatic ecology by molecular biology; the role of aquatic microbes in biogeochemical cycles; characterization of the microbial community; the effect of the environment on aquatic microbes; and the targeting of specific biological processes.

  6. Cardiovascular molecular imaging of apoptosis

    Energy Technology Data Exchange (ETDEWEB)

    Wolters, S.L.; Reutelingsperger, C.P.M. [Maastricht University, Department of Biochemistry, Cardiovascular Research Institute Maastricht, Maastricht (Netherlands); Corsten, M.F.; Hofstra, L. [Maastricht University, Department of Cardiology, Cardiovascular Research Institute Maastricht, P.O. Box 616, Maastricht (Netherlands); Narula, J. [University of California Irvine, Department of Cardiology, Irvine (United States)

    2007-06-15

    Molecular imaging strives to visualise processes at the molecular and cellular level in vivo. Understanding these processes supports diagnosis and evaluation of therapeutic efficacy on an individual basis and thereby makes personalised medicine possible. Apoptosis is a well-organised mode of cell suicide that plays a role in cardiovascular diseases (CVD). Apoptosis is associated with loss of cardiomyocytes following myocardial infarction, atherosclerotic plaque instability, congestive heart failure and allograft rejection of the transplanted heart. Thus, apoptosis constitutes an attractive target for molecular imaging of CVD. Our current knowledge about the molecular players and mechanisms underlying apoptosis offers a rich palette of potential molecular targets for molecular imaging. However, only a few have been successfully developed so far. This review highlights aspects of the molecular machinery and biochemistry of apoptosis relevant to the development of molecular imaging probes. It surveys the role of apoptosis in four major areas of CVD and portrays the importance and future perspectives of apoptosis imaging. The annexin A5 imaging protocol is emphasised since it is the most advanced protocol to measure apoptosis in both preclinical and clinical studies. (orig.)

  7. MOLECULARLY IMPRINTED POLYMER TECHNOLOGY: A ...

    African Journals Online (AJOL)

    dell

    Cross-linking ensures polymer rigidity that “freezes” the 3-D molecular architecture of the binding cavity when the ... molecular technology applications whose potential is still .... recognition element is responsible for the selective ... organic treatments, making them superior ... efficiency with which such materials may be.

  8. Development of molecular nuclear medicine

    International Nuclear Information System (INIS)

    Tang Ganghua

    2002-01-01

    The basic theory of molecular nuclear medicine is briefly introduced. The hot areas of molecular nuclear medicine including metabolic imaging and blood flow imaging, radioimmunoimaging and radioimmunotherapy, radioreceptor imaging and receptor-radioligand therapy, and imaging gene expression and gene radiation therapy are emphatically described

  9. Inadequação do consumo de nutrientes entre adolescentes brasileiros Consumo inadecuado de nutrientes entre adolescentes brasileños Inadequate nutrient intake in Brazilian adolescents

    Directory of Open Access Journals (Sweden)

    Rosely Sichieri

    2013-02-01

    Full Text Available OBJETIVO: Estimar o consumo de energia e nutrientes e a prevalência de inadequação da ingestão de micronutrientes entre adolescentes brasileiros. MÉTODOS: Amostra probabilística composta por 6.797 adolescentes (49,7% do sexo feminino entre dez e 18 anos de idade foi avaliada no Inquérito Nacional de Alimentação, 2008-2009. Os fatores de expansão, a complexidade do desenho da amostra e a correção da variabilidade intrapessoal do consumo foram considerados. A prevalência de inadequação de consumo de micronutrientes foi estimada pela proporção de adolescentes com ingestão abaixo da necessidade média estimada. Para o sódio, estimou-se a prevalência de consumo acima do valor de ingestão máxima tolerável. RESULTADOS: A média de consumo de energia variou de 1.869 kcal, observada nas adolescentes de 10 a 13 anos, a 2.198 kcal, estimada para os adolescentes de 14 a 18 anos. Os carboidratos forneceram 57% da energia total, os lipídios, 27% e as proteínas, 16%. As maiores prevalências de inadequação foram observadas para cálcio (> 95%, fósforo (entre 54% e 69% e vitaminas A (entre 66% e 85%, E (100% e C (entre 27% e 49%. Mais de 70% dos adolescentes apresentaram consumo de sódio superior à ingestão máxima tolerável. CONCLUSÕES: As médias de consumo energético e a distribuição de macronutrientes eram adequadas, mas foram observadas elevadas prevalências de inadequação no consumo de vitaminas e minerais, destacando-se consumo de sódio muito acima do recomendado, consumo de cálcio reduzido e nas adolescentes de 14 a 18 anos foi observada importante inadequação na ingestão de ferro.OBJETIVO: Estimar el consumo de energía y nutrientes y la prevalencia de ingestión inadecuada de micronutrientes entre adolescentes brasileños. MÉTODOS: La muestra probabilística compuesta por 6.797 adolescentes (49,7% del sexo femenino entre diez y 18 años de edad fue evaluada en la Pesquisa Nacional de Alimentación, 2008

  10. Molecular Force Spectroscopy on Cells

    Science.gov (United States)

    Liu, Baoyu; Chen, Wei; Zhu, Cheng

    2015-04-01

    Molecular force spectroscopy has become a powerful tool to study how mechanics regulates biology, especially the mechanical regulation of molecular interactions and its impact on cellular functions. This force-driven methodology has uncovered a wealth of new information of the physical chemistry of molecular bonds for various biological systems. The new concepts, qualitative and quantitative measures describing bond behavior under force, and structural bases underlying these phenomena have substantially advanced our fundamental understanding of the inner workings of biological systems from the nanoscale (molecule) to the microscale (cell), elucidated basic molecular mechanisms of a wide range of important biological processes, and provided opportunities for engineering applications. Here, we review major force spectroscopic assays, conceptual developments of mechanically regulated kinetics of molecular interactions, and their biological relevance. We also present current challenges and highlight future directions.

  11. Handbook of Molecular Force Spectroscopy

    CERN Document Server

    Noy, Aleksandr

    2008-01-01

    "...Noy's Handbook of Molecular Force Spectroscopy is both a timely and useful summary of fundamental aspects of molecular force spectroscopy, and I believe it would make a worthwhile addition to any good scientific library. New research groups that are entering this field would be well advisedto study this handbook in detail before venturing into the exciting and challenging world of molecular force spectroscopy." Matthew F. Paige, University of Saskatchewan, Journal of the American Chemical Society Modern materials science and biophysics are increasingly focused on studying and controlling intermolecular interactions on the single-molecule level. Molecular force spectroscopy was developed in the past decade as the result of several unprecedented advances in the capabilities of modern scientific instrumentation, and defines a number of techniques that use mechanical force measurements to study interactions between single molecules and molecular assemblies in chemical and biological systems. Examples of these...

  12. Chirality in molecular collision dynamics

    Science.gov (United States)

    Lombardi, Andrea; Palazzetti, Federico

    2018-02-01

    Chirality is a phenomenon that permeates the natural world, with implications for atomic and molecular physics, for fundamental forces and for the mechanisms at the origin of the early evolution of life and biomolecular homochirality. The manifestations of chirality in chemistry and biochemistry are numerous, the striking ones being chiral recognition and asymmetric synthesis with important applications in molecular sciences and in industrial and pharmaceutical chemistry. Chiral discrimination phenomena, due to the existence of two enantiomeric forms, very well known in the case of interaction with light, but still nearly disregarded in molecular collision studies. Here we review some ideas and recent advances about the role of chirality in molecular collisions, designing and illustrating molecular beam experiments for the demonstration of chiral effects and suggesting a scenario for a stereo-directional origin of chiral selection.

  13. Molecular electron affinities

    International Nuclear Information System (INIS)

    Fukuda, E.K.

    1983-01-01

    Molecular electron affinities have historically been difficult quantities to measure accurately. These difficulties arise from differences in structure between the ion and neutral as well as the existence of excited negative ion states. To circumvent these problems, relative electron affinities were determined in this dissertation by studying equilibrium electron transfer reactions using a pulsed ion cyclotron resonance (ICR) spectrometer. Direct measurement of ion and neutral concentrations for reactions of the general type, A - + B = B - + A, allow calculation of the equilibrium constant and, therefore, the free energy change. The free energy difference is related to the difference in electron affinities between A and B. A relative electron affinity scale covering a range of about 45 kcal/mol was constructed with various substituted p-benzoquinones, nitrobenzenes, anhydrides, and benzophenones. To assign absolute electron affinities, various species with accurately known electron affinities are tied to the scale via ion-cyclotron double resonance bracketing techniques. After the relative scale is anchored to these species with well-known electron affinities, the scale is then used as a check on other electron affinity values as well as generating new electron affinity values. Many discrepancies were found between the electron affinities measured using the ICR technique and previous literature determinations

  14. Molecular analysis of thymoma.

    Directory of Open Access Journals (Sweden)

    Sunil Badve

    Full Text Available Histologic classification of thymomas has significant limitations with respect to both subtype definitions and consistency. In order to better understand the biology of the disease processes, we performed whole genome gene expression analysis. RNA was extracted from fresh frozen tumors from 34 patients with thymomas and followup data was available. Using the Illumina BeadStudio® platform and Human Ref-8 Beadchip, gene expression data was analyzed with Partek Genomics Suite®, and Ingenuity Pathways Analysis (IPA. Unsupervised clustering of gene expression data, representing one of the largest series in literature, resulted in identification of four molecular clusters of tumors (C1-C4, which correlated with histology (P = 0.002. However, neither histology nor clusters correlated with clinical outcomes. Correlation of gene expression data with clinical data showed that a number of genes were associated with either advanced stage at diagnosis or development of recurrence or metastases. The top pathways associated with metastases were amino acid metabolisms, biosynthesis of steroids and glycosphingolipids, cell cycle checkpoint proteins and Notch signaling. The differential expression of some of the top genes related to both metastases and stage was confirmed by RT-PCR in all cases of metastases and matched nonmetastatic cases. A number of potential candidates for therapeutics were also identified.

  15. Molecular diagnostics of periodontitis.

    Science.gov (United States)

    Korona-Głowniak, Izabela; Siwiec, Radosław; Berger, Marcin; Malm, Anna; Szymańska, Jolanta

    2017-01-28

    The microorganisms that form dental plaque are the main cause of periodontitis. Their identification and the understanding of the complex relationships and interactions that involve these microorganisms, environmental factors and the host's health status enable improvement in diagnostics and targeted therapy in patients with periodontitis. To this end, molecular diagnostics techniques (both techniques based on the polymerase chain reaction and those involving nucleic acid analysis via hybridization) come increasingly into use. On the basis of a literature review, the following methods are presented: polymerase chain reaction (PCR), real-time polymerase chain reaction (real-time PCR), 16S rRNA-encoding gene sequencing, checkerboard and reverse-capture checkerboard hybridization, microarrays, denaturing gradient gel electrophoresis (DGGE), temperature gradient gel electrophoresis (TGGE), as well as terminal restriction fragment length polymorphism (TRFLP) and next generation sequencing (NGS). The advantages and drawbacks of each method in the examination of periopathogens are indicated. The techniques listed above allow fast detection of even small quantities of pathogen present in diagnostic material and prove particularly useful to detect microorganisms that are difficult or impossible to grow in a laboratory.

  16. Molecular diagnostics of periodontitis

    Directory of Open Access Journals (Sweden)

    Izabela Korona-Głowniak

    2017-01-01

    Full Text Available The microorganisms that form dental plaque are the main cause of periodontitis. Their identification and the understanding of the complex relationships and interactions that involve these microorganisms, environmental factors and the host’s health status enable improvement in diagnostics and targeted therapy in patients with periodontitis. To this end, molecular diagnostics techniques (both techniques based on the polymerase chain reaction and those involving nucleic acid analysis via hybridization come increasingly into use. On the basis of a literature review, the following methods are presented: polymerase chain reaction (PCR, real-time polymerase chain reaction (real-time PCR, 16S rRNA-encoding gene sequencing, checkerboard and reverse-capture checkerboard hybridization, microarrays, denaturing gradient gel electrophoresis (DGGE, temperature gradient gel electrophoresis (TGGE, as well as terminal restriction fragment length polymorphism (TRFLP and next generation sequencing (NGS. The advantages and drawbacks of each method in the examination of periopathogens are indicated. The techniques listed above allow fast detection of even small quantities of pathogen present in diagnostic material and prove particularly useful to detect microorganisms that are difficult or impossible to grow in a laboratory.

  17. A molecular noise generator

    International Nuclear Information System (INIS)

    Lu Ting; Ferry, Michael; Hasty, Jeff; Weiss, Ron

    2008-01-01

    Recent studies have demonstrated that intracellular variations in the rate of gene expression are of fundamental importance to cellular function and development. While such 'noise' is often considered detrimental in the context of perturbing genetic systems, it can be beneficial in processes such as species diversification and facilitation of evolution. A major difficulty in exploring such effects is that the magnitude and spectral properties of the induced variations arise from some intrinsic cellular process that is difficult to manipulate. Here, we present two designs of a molecular noise generator that allow for the flexible modulation of the noise profile of a target gene. The first design uses a dual-signal mechanism that enables independent tuning of the mean and variability of an output protein. This is achieved through the combinatorial control of two signals that regulate transcription and translation separately. We then extend the design to allow for DNA copy-number regulation, which leads to a wider tuning spectrum for the output molecule. To gain a deeper understanding of the circuit's functionality in a realistic environment, we introduce variability in the input signals in order to ascertain the degree of noise induced by the control process itself. We conclude by illustrating potential applications of the noise generator, demonstrating how it could be used to ascertain the robust or fragile properties of a genetic circuit

  18. Molecular nuclear cardiac imaging

    Energy Technology Data Exchange (ETDEWEB)

    Lee, Dong Soo; Paeng, Jin Chul [College of Medicine, Seoul National Univ., Seoul (Korea, Republic of)

    2004-04-01

    Molecular nuclear cardiac imaging has included Tc-99m Annexin imaging to visualize myocardial apoptosis, but is now usually associated with gene therapy and cell-based therapy. Cardiac gene therapy was not successful so far but cardiac reporter gene imaging was made possible using HSV-TK (herpes simplex virus thymidine kinase) and F-18 FHBG (fluoro-hydroxymethylbutyl guanine) or I-124 FIAU (fluoro-deoxyiodo-arabino-furanosyluracil). Gene delivery was performed by needle injection with or without catheter guidance. TK expression did not last longer than 2 weeks in myocardium. Cell-based therapy of ischemic heart or failing heart looks promising, but biodistribution and differentiation of transplanted cells are not known. Reporter genes can be transfected to the stem/progenitor cells and cells containing these genes can be transplanted to the recipients using catheter-based purging or injection. Repeated imaging should be available and if promoter are varied to let express reporter transgenes, cellular (trans)differentiation can be studied. NIS (sodium iodide symporter) or D2R receptor genes are promising in this aspect.

  19. Superradiance From Molecular Nanomagnets

    Science.gov (United States)

    Chudnovsky, Eugene M.

    2003-03-01

    Magnetic dipolar transitions in individual magnetic molecules occur with a very low probability. However, typical wavelengths of the corresponding electromagnetic radiation are in the millimeter range, that is, comparable to the crystal size. This may result in the superradiance: The coherent emission of the electromagnetic radiation by the entire crystal, with the rate increased by the total number of molecules as compared to the rate of the individual emission. Rigorous theory of the superradiant resonant magnetic relaxation will be presented, that generalizes the Landau-Zener effect for the case of a macroscopic number of magnetic molecules coupled through the electromagnetic radiation [1]. Possible evidence of coherent electromagnetic effects in crystals of molecular nanomagnets placed inside a resonant cavity will be reported [2]. (This work has been supported by the NSF grant No. DMR-9978882.) [1] E. M. Chudnovsky and D. A. Garanin, Phys. Rev. Lett. 89, 157201 (7 Oct 2002). [2] J. Tejada, E. M. Chudnovsky, R. Amigo, and J. M. Hernandez, cond-mat/0210340 (16 Oct 2002).

  20. Molecular screening in galactosemia

    Energy Technology Data Exchange (ETDEWEB)

    Elsas, L.J.; Singh, R.; Fernhoff, P.M. [Emory Univ., Atlanta, GA (United States)] [and others

    1994-09-01

    Classical galactosemia (G/G) is caused by the absence of galactose-1-phosphate uridyl transferase (GALT) activity while the Duarte allele produces partial impairment and a specific biochemical phenotype. Cloning and sequencing of the human GALT gene has enabled the identification of prevalent mutations for both Classical and Duarte alleles. The G allele is caused by a Q188R codon mutation in exon 6 in 70% of a Caucasian population while the D allele is caused by an N134D codon mutation in exon 10. Since the Q188R sequence creates a new Hpa II site and the N314D sequence creates a new Sin I site, it is relatively easy to screen for both mutations by multiplex PCR and restriction digest. Here we describe a method for detection of new mutations producing impaired GALT. Patient DNAs are subjected to SSCP (single strand conformational polymorphism) analysis of their 11 GALT exons. Direct sequencing of the exons targeted by SSCP has revealed many codon changes: IVSC 956 (a splice acceptor site loss), S135L, V151A, E203K, A320T, and Y323D. Two of these codon changes, V151A and S135L, have been confirmed as mutations by finding impaired GALT activity in a yeast expression system. We conclude that molecular screening of GALT DNA will clarify the structural biology of GALT and the pathophysiology of galactosemia.

  1. Radically enhanced molecular recognition

    KAUST Repository

    Trabolsi, Ali; Khashab, Niveen M.; Fahrenbach, Albert C.; Friedman, Douglas C.; Colvin, Michael T.; Coti, Karla K.; Bení tez, Diego S.; Tkatchouk, Ekaterina; Olsen, John Carl; Belowich, Matthew E.; Carmieli, Raanan; Khatib, Hussam A.; Goddard, William Andrew III; Wasielewski, Michael R.; Stoddart, Fraser Fraser Raser

    2009-01-01

    The tendency for viologen radical cations to dimerize has been harnessed to establish a recognition motif based on their ability to form extremely strong inclusion complexes with cyclobis(paraquat-p-phenylene) in its diradical dicationic redox state. This previously unreported complex involving three bipyridinium cation radicals increases the versatility of host-guest chemistry, extending its practice beyond the traditional reliance on neutral and charged guests and hosts. In particular, transporting the concept of radical dimerization into the field of mechanically interlocked molecules introduces a higher level of control within molecular switches and machines. Herein, we report that bistable and tristable [2]rotaxanes can be switched by altering electrochemical potentials. In a tristable [2]rotaxane composed of a cyclobis(paraquat-p-phenylene) ring and a dumbbell with tetrathiafulvalene, dioxynaphthalene and bipyridinium recognition sites, the position of the ring can be switched. On oxidation, it moves from the tetrathiafulvalene to the dioxynaphthalene, and on reduction, to the bipyridinium radical cation, provided the ring is also reduced simultaneously to the diradical dication. © 2010 Macmillan Publishers Limited. All rights reserved.

  2. Molecular physiology of seeds

    International Nuclear Information System (INIS)

    Hajduch, M.

    2014-05-01

    Plant development is well described. However, full understanding of the regulation of processes associated with plant development is still missing. Present Dr.Sc. thesis advances our understanding of the regulation of plant development by quantitative proteomics analyses of seed development of soybean, canola, castor, flax, and model plant arabidopsis in control and environmentally challenged environments. The analysis of greenhouse-grown soybean, canola, castor, and arabidospis provided complex characterization of metabolic processes during seed development, for instance, of carbon assimilation into fatty acids. Furthermore, the analyses of soybean and flax grown in Chernobyl area provided in-depth characterization of seed development in radio-contaminated environment. Soybean and flax were altered by radio-contaminated environment in different way. However, these alterations resulted into modifications in seed oil content. Further analyses showed that soybean and flax possess alterations of carbon metabolism in cytoplasm and plastids along with increased activity of photosynthetic apparatus. Our present experiments are focused on further characterization of molecular bases that might be responsible for alterations of seed oil content in Chernobyl grown plants. (author)

  3. Molecular methods for biofilms

    KAUST Repository

    Ferrera, Isabel; Balagué , Vanessa; Voolstra, Christian R.; Aranda, Manuel; Bayer, Till; Abed, Raeid M.M.; Dobretsov, Sergey; Owens, Sarah M.; Wilkening, Jared; Fessler, Jennifer L.; Gilbert, Jack A.

    2014-01-01

    This chapter deals with both classical and modern molecular methods that can be useful for the identification of microorganisms, elucidation and comparison of microbial communities, and investigation of their diversity and functions. The most important and critical steps necessary for all molecular methods is DNA isolation from microbial communities and environmental samples; these are discussed in the first part. The second part provides an overview over DNA polymerase chain reaction (PCR) amplification and DNA sequencing methods. Protocols and analysis software as well as potential pitfalls associated with application of these methods are discussed. Community fingerprinting analyses that can be used to compare multiple microbial communities are discussed in the third part. This part focuses on Denaturing Gradient Gel Electrophoresis (DGGE), Terminal Restriction Fragment Length Polymorphism (T-RFLP) and Automated rRNA Intergenic Spacer Analysis (ARISA) methods. In addition, classical and next-generation metagenomics methods are presented. These are limited to bacterial artificial chromosome and Fosmid libraries and Sanger and next-generation 454 sequencing, as these methods are currently the most frequently used in research. Isolation of nucleic acids: This chapter discusses, the most important and critical steps necessary for all molecular methods is DNA isolation from microbial communities and environmental samples. Nucleic acid isolation methods generally include three steps: cell lysis, removal of unwanted substances, and a final step of DNA purification and recovery. The first critical step is the cell lysis, which can be achieved by enzymatic or mechanical procedures. Removal of proteins, polysaccharides and other unwanted substances is likewise important to avoid their interference in subsequent analyses. Phenol-chloroform-isoamyl alcohol is commonly used to recover DNA, since it separates nucleic acids into an aqueous phase and precipitates proteins and

  4. Molecular methods for biofilms

    KAUST Repository

    Ferrera, Isabel

    2014-08-30

    This chapter deals with both classical and modern molecular methods that can be useful for the identification of microorganisms, elucidation and comparison of microbial communities, and investigation of their diversity and functions. The most important and critical steps necessary for all molecular methods is DNA isolation from microbial communities and environmental samples; these are discussed in the first part. The second part provides an overview over DNA polymerase chain reaction (PCR) amplification and DNA sequencing methods. Protocols and analysis software as well as potential pitfalls associated with application of these methods are discussed. Community fingerprinting analyses that can be used to compare multiple microbial communities are discussed in the third part. This part focuses on Denaturing Gradient Gel Electrophoresis (DGGE), Terminal Restriction Fragment Length Polymorphism (T-RFLP) and Automated rRNA Intergenic Spacer Analysis (ARISA) methods. In addition, classical and next-generation metagenomics methods are presented. These are limited to bacterial artificial chromosome and Fosmid libraries and Sanger and next-generation 454 sequencing, as these methods are currently the most frequently used in research. Isolation of nucleic acids: This chapter discusses, the most important and critical steps necessary for all molecular methods is DNA isolation from microbial communities and environmental samples. Nucleic acid isolation methods generally include three steps: cell lysis, removal of unwanted substances, and a final step of DNA purification and recovery. The first critical step is the cell lysis, which can be achieved by enzymatic or mechanical procedures. Removal of proteins, polysaccharides and other unwanted substances is likewise important to avoid their interference in subsequent analyses. Phenol-chloroform-isoamyl alcohol is commonly used to recover DNA, since it separates nucleic acids into an aqueous phase and precipitates proteins and

  5. Molecular factors in migraine

    Science.gov (United States)

    Kowalska, Marta; Prendecki, Michał; Kozubski, Wojciech; Lianeri, Margarita; Dorszewska, Jolanta

    2016-01-01

    Migraine is a common neurological disorder that affects 11% of adults worldwide. This disease most likely has a neurovascular origin. Migraine with aura (MA) and more common form - migraine without aura (MO) – are the two main clinical subtypes of disease. The exact pathomechanism of migraine is still unknown, but it is thought that both genetic and environmental factors are involved in this pathological process. The first genetic studies of migraine were focused on the rare subtype of MA: familial hemiplegic migraine (FHM). The genes analysed in familial and sporadic migraine are: MTHFR, KCNK18, HCRTR1, SLC6A4, STX1A, GRIA1 and GRIA3. It is possible that migraine is a multifactorial disease with polygenic influence. Recent studies have shown that the pathomechanisms of migraine involves both factors responsible for immune response and oxidative stress such as: cytokines, tyrosine metabolism, homocysteine; and factors associated with pain transmission and emotions e.g.: serotonin, hypocretin-1, calcitonin gene-related peptide, glutamate. The correlations between genetic variants of the HCRTR1 gene, the polymorphism 5-HTTLPR and hypocretin-1, and serotonin were observed. It is known that serotonin inhibits the activity of hypocretin neurons and may affect the appearance of the aura during migraine attack. The understanding of the molecular mechanisms of migraine, including genotype-phenotype correlations, may contribute to finding markers important for the diagnosis and treatment of this disease. PMID:27191890

  6. Radically enhanced molecular recognition

    KAUST Repository

    Trabolsi, Ali

    2009-12-17

    The tendency for viologen radical cations to dimerize has been harnessed to establish a recognition motif based on their ability to form extremely strong inclusion complexes with cyclobis(paraquat-p-phenylene) in its diradical dicationic redox state. This previously unreported complex involving three bipyridinium cation radicals increases the versatility of host-guest chemistry, extending its practice beyond the traditional reliance on neutral and charged guests and hosts. In particular, transporting the concept of radical dimerization into the field of mechanically interlocked molecules introduces a higher level of control within molecular switches and machines. Herein, we report that bistable and tristable [2]rotaxanes can be switched by altering electrochemical potentials. In a tristable [2]rotaxane composed of a cyclobis(paraquat-p-phenylene) ring and a dumbbell with tetrathiafulvalene, dioxynaphthalene and bipyridinium recognition sites, the position of the ring can be switched. On oxidation, it moves from the tetrathiafulvalene to the dioxynaphthalene, and on reduction, to the bipyridinium radical cation, provided the ring is also reduced simultaneously to the diradical dication. © 2010 Macmillan Publishers Limited. All rights reserved.

  7. Molecular nuclear cardiac imaging

    International Nuclear Information System (INIS)

    Lee, Dong Soo; Paeng, Jin Chul

    2004-01-01

    Molecular nuclear cardiac imaging has included Tc-99m Annexin imaging to visualize myocardial apoptosis, but is now usually associated with gene therapy and cell-based therapy. Cardiac gene therapy was not successful so far but cardiac reporter gene imaging was made possible using HSV-TK (herpes simplex virus thymidine kinase) and F-18 FHBG (fluoro-hydroxymethylbutyl guanine) or I-124 FIAU (fluoro-deoxyiodo-arabino-furanosyluracil). Gene delivery was performed by needle injection with or without catheter guidance. TK expression did not last longer than 2 weeks in myocardium. Cell-based therapy of ischemic heart or failing heart looks promising, but biodistribution and differentiation of transplanted cells are not known. Reporter genes can be transfected to the stem/progenitor cells and cells containing these genes can be transplanted to the recipients using catheter-based purging or injection. Repeated imaging should be available and if promoter are varied to let express reporter transgenes, cellular (trans)differentiation can be studied. NIS (sodium iodide symporter) or D2R receptor genes are promising in this aspect

  8. Molecular dynamics of bacteriorhodopsin.

    Science.gov (United States)

    Lupo, J A; Pachter, R

    1997-02-01

    A model of bacteriorhodopsin (bR), with a retinal chromophore attached, has been derived for a molecular dynamics simulation. A method for determining atomic coordinates of several ill-defined strands was developed using a structure prediction algorithm based on a sequential Kalman filter technique. The completed structure was minimized using the GROMOS force field. The structure was then heated to 293 K and run for 500 ps at constant temperature. A comparison with the energy-minimized structure showed a slow increase in the all-atom RMS deviation over the first 200 ps, leveling off to approximately 2.4 A relative to the starting structure. The final structure yielded a backbone-atom RMS deviation from the crystallographic structure of 2.8 A. The residue neighbors of the chromophore atoms were followed as a function of time. The set of persistent near-residue neighbors supports the theory that differences in pKa values control access to the Schiff base proton, rather than formation of a counterion complex.

  9. Das vizinhanças entre o feminino e a loucura

    Directory of Open Access Journals (Sweden)

    Elizabeth Cristina Landi

    Full Text Available O tema da loucura feminina se apresenta frequentemente na clínica psicanalítica por meio de sujeitos neuróticos. Questiona-se neste artigo as proximidades entre psicose e a loucura que se apresenta no discurso das mulheres neuróticas. As identificações iniciais, por meio das quais a criança se aliena ao desejo do Outro, determinam certa loucura, não restrita apenas aos psicóticos. Para um sujeito do sexo feminino, que passa pelo tortuoso processo de tornar-se mulher, a loucura é uma possibilidade, pois uma mulher, por encontrar-se dividida entre o gozo masculino e o feminino, se aproxima da loucura, mas é não louca-de-todo.

  10. Límites en las competencias entre la Sala Constitucional y el Tribunal Supremo de Elecciones

    Directory of Open Access Journals (Sweden)

    Luis Paulino Mora

    2011-07-01

    Full Text Available : La ponencia se propone establecer la importante distinción entre órgano y función, con el fin de exponer algunas nociones que deben servir como orientación para la respuesta que pueda darse a la cuestión planteada de la delimitación de competencias entre la Sala Constitucional y el Tribunal Supremo de Elecciones en lo que respecta a los derechos y las libertades de carácter político-electoral. Explica la base jurídica que la Sala Constitucional ha empleado para abordar los temas de su relación competencial con el Tribunal Supremo de Elecciones

  11. Un viaje por la movilidad cotidiana. El espacio entre el transporte y el individuo

    Directory of Open Access Journals (Sweden)

    Bruno Salerno

    2014-01-01

    la movilidad cotidiana poniendo atención en el problema de la oferta y la demanda. En este sentido, se expone un avance progresivo desde enfoques más centrados en el transporte, hasta enfoques más orientados hacia el individuo. Este problema va de la mano de la tensión entre agregadoindividuo. Finalmente, la argumentación va a ser construida en clave de la relación entre la movilidad como una práctica social y las relaciones sociales y la producción del espacio en general. Las conclusiones versan, en gran medida, sobre las implicancias y supuestos de la adopción del individuo como objeto de estudio.

  12. Indústria de tabaco e cidadania: confronto entre redes organizacionais

    OpenAIRE

    Boeira, Sérgio Luís

    2006-01-01

    O artigo aborda a história da indústria de tabaco no Brasil e da formação de sua rede estratégica, bem como da rede dos atores sociais que a contrapõem. Na primeira parte, apresenta-se uma correlação entre a história da produção industrial, do consumo de tabaco e do antitabagismo. Na segunda parte são apresentados os conceitos de rede estratégica e de rede multifragmentária (antifumo), propostos para facilitar a compreensão de alguns dos múltiplos aspectos conflitivos entre as duas redes. A p...

  13. EL CUERPO DEL DOMUS ENTRE DOS SIGLOS DESDE EL DISCURSO TECNO-PSICOLÓGICO

    Directory of Open Access Journals (Sweden)

    Heidi Figueroa Sarriera

    2013-01-01

    Full Text Available A través de la discusión de dos inventos que reúnen instancias del discurso tecnopsicológico del siglo XX, se dialoga sobre continuidades e inflexiones en la construcción del imaginario corporal en el ambiente domótico entre los siglos XX y XXI. Se argumenta que los aparatos tecnológicos son más que meras herramientas, pues participan activa- mente en la construcción de imaginarios epocales sobre el cuerpo y la subjetividad. Se concluye con el vínculo entre la producción de un imaginario de cuerpo transparente junto a una subjetividad de autorregulación.

  14. La no neutralidad del dinero en el largo plazo. Un debate entre Chicago & Viena.

    Directory of Open Access Journals (Sweden)

    Ravier Adrián O.

    2010-08-01

    Full Text Available Existen numerosos consensos entre los economistas de Chicago y Viena en lo que concierne a la comprensión del funcionamiento de los mercados y las políticas públicas, y en el rechazo al intervencionismo, el socialismo y el totalitarismo. Sin embargo, en lo referente a temas macroeconómicos, y en particular a la política monetaria y a la neutralidad o no neutralidad de sus efectos en el largo plazo, aparecen diferencias sustanciales. Este artículo repasa el debate entre estas dos escuelas de pensamiento, tomando como base una crítica que el Dr. Humphrey elaboró en 1984. La relevancia de discutir este trabajo, veinticinco años después de su publicación consiste en retomar un debate que permaneció olvidado desde entonces.

  15. Orlandos: intercâmbio entre Virginia Woolf e Sally Potter

    Directory of Open Access Journals (Sweden)

    Fabiana Gomes Assis

    2017-01-01

    Full Text Available http://dx.doi.org/10.5007/2175-8026.2017v70n1p187 Proponho, neste ensaio, pensar os diálogos entre narrativa literária e fílmica a partir de uma perspectiva sintonizada com o pensamento feminista. Para isso, trago ao palco o intrigante livro de Virginia Woolf, Orlando: a biography (1928, seguido da (recriação cinematográfica, Orlando (1992, dirigida e produzida pela autêntica Sally Potter, tendo em vista que ambas as autoras, em suas obras, demonstram certa preocupação e engajamento em questionar os papéis sociais que mulheres e homens desempenham culturalmente. O objetivo é refletir, portanto, sobre as convergências entre esses dois textos, em se tratando das problematizações referentes ao gênero identitário, construído de modo ambivalente, da protagonista.

  16. Clarice Lispector e o simbolismo da montanha: Retrato de um ser entre dois mundos

    Directory of Open Access Journals (Sweden)

    Santo Gabriel Vaccaro

    2012-11-01

    Full Text Available Clarice Lispector, en su relato 'Onde estivestes de noite', produce con su divinidad andrógina El-ella y con sus seguidores un movimiento que aborda la sexualidad a partir de nuevos paradigmas y configura una escritura en que el hombre es retratado como un ser irremediablemente escindido entre naturaleza y cultura, entre deseo y razón. Esa dicotomía se extiende a otros personajes clariceanos aquí rescatados, cuya particular caracterización psicológica posibilita un análisis basado en los postulados psicoanalíticos, a partir del texto Cinco lecciones de psicoanálisis de Sigmund Freud.

  17. Da sociedade de sociedades à insularidade do estado entre medievo e idade moderna

    Directory of Open Access Journals (Sweden)

    Paolo Grossi

    2007-12-01

    Full Text Available O presente artigo tem por objetivo exploraras descontinuidades entre os universos medievale moderno, enfocando, para tanto, as diferentesformas de a dimensão jurídica relacionar-secom a dimensão política e social, que, sobre basesantropológicas profundamente distintas (primeirocomunitária e, depois, individualista, identificama contraposição entre a “sociedade de sociedades”de origem medieval, e a insularidade doEstado, caracteristicamente moderna.This article has by purpose to explorethe discontinuities between the middle-aged andmodern universes, focusing, so for, the differentways to the juridical dimension to relate with thepolitical and social dimension, that, overanthropological bases deeply distint (firstcommunitarian and then individualist, identify thecounterposition between the “society of societies”from middle-aged source,and the State insularity,characteristicly modern.

  18. Co-variabilidad de la temperatura superficial del mar entre cuencas del Hemisferio Sur

    Directory of Open Access Journals (Sweden)

    Ana Laura Berman

    2011-12-01

    Full Text Available En este trabajo se estudian relaciones estadísticas entre diferentes regiones de los océanos del Hemisferio Sur en todo el espacio tiempo-frecuencia durante los últimos cincuenta años aplicando la metodología de transformada ondeletas de coherencia a promedios anuales de anomalías mensuales de temperatura superficial del mar. Entre los resultados más relevantes encontrados debe mencionarse que las regiones del oeste y centro del Pacífico tropical tienen una estrecha relación en oscilaciones menores a 8 años y en oscilaciones alrededor de 12 años pero notables desacoples son detectados en el resto del espacio de frecuencias. Por otra parte, la relación entre las regiones del oeste y del este del Pacífico tropical es significativa sólo en oscilaciones menores a 8 años con una clara interrupción durante la década de 1980. Importantes conexiones en oscilaciones interdecadales son detectadas entre las regiones del oeste y centro del Pacifico subtropical. En el Océano Atlántico se encuentran relaciones significativas en un amplio rango de frecuencias entre las regiones del oeste y, especialmente, entre las regiones tropicales mientras que en el Océano Indico solo se observan relaciones importantes entre áreas subtropicales en oscilaciones decadales e interdecadales. El análisis también revela fuertes conexiones entre las tres cuencas oceánicas en diferentes bandas de frecuencia.Relations among different regions of the Southern Hemisphere oceans in the whole time-frequency space during the last fifty years are studied applying the methodology of Wavelet Coherence Analysis to annual means of monthly anomalies of sea surface temperature. Among the most relevant results, it must be mentioned that the western and central regions of the tropical Pacific have a close relation in oscillations shorter than 8 years and in oscillations around 12 years but important disconnections are detected in the rest of the space of frequencies

  19. El “consentimiento” negociado entre dos comunidades mineras mexicanas y las trasnacionales Goldcorp y Ternium

    Directory of Open Access Journals (Sweden)

    Blanca Ruth Santos Cordero

    2015-01-01

    Full Text Available En este artículo se busca reconstruir la dinámica de la relación entre empresas trasnacionales y comunidades rurales mexicanas, a partir de dos estudios de caso: la minera canadiense Goldcorp, en Mazapil, Zacatecas, y la italo-argentina Ternium, en San Miguel Arcángel, en Aquila, Michoacán. La hipótesis sostiene que la racionalidad de la máxima ganancia y el cálculo del riesgo están presentes en las negociaciones entabladas entre las comunidades campesinas y las corporaciones. Y, si bien en ellas se ha establecido una hegemonía de la racionalidad económica capitalista, el consentimiento ha sido activo y negociado.

  20. LES RELATIONS ENTRE L’ERODABILITE DES SOLS ET LEURS PROPRIETES PHYSICO-MECANIQUES

    Directory of Open Access Journals (Sweden)

    I. C. Stanga

    2005-10-01

    Full Text Available L’érodabilité représente la susceptibilité des sols d’être érodés sous l’action des pluies, du ruissellement ou du vent. Cette susceptibilité est conditionnée par les propriétés physico-chimiques des sols. Dans l’article ci-dessous, on montre les relations qui existent entre l’érodabilité et les propriétés physico-mécaniques des sols, dont les plus importantes sont la granulométrie (surtout le rapport entre différentes fractions texturales, la structure, la densité, la permeabilité et la conductivité hydrauliques.