42 research outputs found

    Analytic evaluation of Franck-Condon integrals for anharmonic vibrational wave functions

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    The problem of calculating Franck-Condon overlap integrals in molecular transitions between vibrational states in different electronic configurations is addressed. An exact and easily applicable analytical expression is obtained when the vibrational states can be approximated by eigenstates of Morse potentials with different strengths and locations but identical ranges. An approximate analytical expression is obtained for the general case. The method is applied to the stretching S-S mode corresponding to [Formula Presented] transitions in the [Formula Presented] molecule.Dirección General de Investigación Científica y Técnica PB95-053

    Configuration localized Morse wave functions: Application to vibrational transitions in anharmonic diatomic molecules

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    The bound states of a Morse potential are described in terms of a basis of states that are characterized for being eigenstates of the Morse variable. These states are strongly localized in configuration space; thus they are called configuration localized Morse (CLM) wave functions. These are shown to provide a powerful tool to calculate analytically, to a good approximation, matrix elements of arbitrary functions of the interatomic separation between vibrational states of anharmonic diatomic molecules. Applications of CLM wave functions to the calculation of vibrational transitions in HF and DF diatomic molecules are presented.Dirección General de Investigación Científica y Técnica PB95-0533European Commission CI1*-CT94-007

    Configuration localized wave functions: General formalism and applications to vibrational spectroscopy of diatomic molecules

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    A general formalism for constructing configuration localized states for one-dimensional potentials is presented. It allows the evaluation of accurate approximations to the vibrational matrix elements of the momentum operator and of arbitrary functions of the coordinate. The formalism is applied to three potentials of interest in molecular physics: the harmonic oscillator, Morse, and Pöschl-Teller potentials. Quadratures specifically designed for each potential are used. The infrared vibrational spectrum of [Formula Presented] is studied as a way to test the results obtained for different potentials in connection with their ability to model the anharmonicity

    DETERMINANTES SOCIAIS DA DISTRIBUIÇÃO ESPACIAL DOS CASOS DE DENGUE NA FAIXA FRONTEIRIÇA DO BRASIL

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      In the present study social determinants of the spatial distribution of dengue fever were identified at the Brazilian borders. There were performed descriptive and inferential analysis of different socio-economic indicators and the incidence of dengue fever by municipality. The municipalities were categorized according to levels of organization of the international border: border strip, border and twin cities. Empirical Bayesian methods and Spearman correlation coefficients were performed for spatial analyses. At the country level and border strip, associations between incidence of dengue fever and employment status were found (rho>0,25; p<0,01). On the border, associations with social vulnerability, access to education and sewage were founded (-0,38<rho>0,50; p<0,001). And finally, at twin cities, associations with income inequality, social vulnerability, mobility and access to education and sanitation were founded (-0,46<rho>0,53; p<0,001). These results indicate the existence of differences between social determinants of dengue fever studied with different levels of spatial organization of the international border strip, as well as discrepancies in the population’s access to basic social services, education level and social vulnerability, which were related to the proximity of the international border municipalities.O presente estudo busca identificar os determinantes sociais da distribuição espacial do dengue nas fronteiras do Brasil. Foram realizadas análises descritivas e inferenciais de diferentes indicadores socioeconômicos, bem como da incidência do dengue por município, discriminados pelos níveis de organização da fronteira internacional: faixa de fronteira, linha de fronteira e cidades gêmeas. Foram utilizados métodos bayesianos empíricos e o coeficiente de correlação de Spearman para as análises espaciais. No nível de país e faixa de fronteira, se encontraram associações da incidência de dengue com a condição laboral (rho>0,25; p<0,01). Na linha de fronteira foram encontradas associações com a vulnerabilidade social, o acesso à serviços de educação e saneamento (-0,38<rho>0,50; p<0,001). Por último, nas cidades gêmeas com a desigualdade da renda, vulnerabilidade social, a mobilidade e o acesso aos serviços de educação e saneamento (-0,46<rho>0,53; p<0,001). Os achados apontam a existência de diferenças entre os determinantes sociais estudados do dengue com os diferentes níveis de organização espacial da faixa de fronteira internacional, bem como discrepâncias quanto ao acesso da população à serviços sociais básicos, o nível de instrução e a renda, os quais foram relacionados com a incidência de dengue e a proximidade dos municípios à fronteira internacional

    Caracterización preliminar de los sitios de cría de Aedes (Stegomyia) albopictus (Skuse, 1894) (Diptera: Culicidae) en el municipio de Leticia, Amazonas, Colombia

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    Introduction. Because the role of Aedes albopictus as an incriminated vector of several viral pathogens, its control is important to human health. To establish appropriate control methods, characterization of the larval habitats is a necessary first step.Objective. Habitats of the immature stages of Ae. albopictus were characterized with respect to physical-chemical parameters and by floral and faunal arrays present.Materials and methods. Leticia is located at the southernmost tip of Colombia on the banks of the Amazon River. In the urban area, 154 houses were inspected in December 2002 and January 2003. Physical-chemical data were collected, including exposure to sunlight, location, container size and material, water conductivity, and dissolved oxygen. Macroinvertebrates and plankton samples were taken at each positive larval site. The results were compared using descriptive analysis, principal component analysis, classification dendrograms, and diversity indexes.Results. Twenty-one habitats were found positive for Diptera, and 13 were positive for Ae. albopictus larvae. Most of the positive habitats (92%) were located near the houses--they were small or medium size receptacles located in the shade. This water generally had low conductivity and low turbidity, although high values of these parameters were also identified. The habitats had low diversity indexes for macroinvertebrates and high diversity indexes for plankton. In the principal component analysis, significant correlation was found with mites, oligochaetes and hemipterans (the macroinvertebrates) and with bacilarophyceaes, clorophyceaes and cianophyceas (the algal forms).Conclusion. In Leticia, females of Ae. albopictus were found in newly established habitats with sufficient availability of resources, low conductivity, and turbidity, lower intra-and interspecific competition.Introducción. Dada la importancia de Aedes albopictus en la salud pública, es necesario caracterizar los criaderos para establecer medidas de control.Objetivo. Caracterizar en función de los parámetros físico-químicos y grupos de organismos presentes, los criaderos de los estadios inmaduros de Ae. albopictus en Leticia, Amazonas.Materiales y métodos. Se inspeccionaron 154 viviendas en el área urbana en diciembre 2002 y enero 2003, para buscar criaderos de Ae. albopictus y otros dípteros con estadios acuáticos inmaduros. En los criaderos con resultados positivos se tomaron datos físico-químicos cualitativos y cuantitativos: exposición al sol, ubicación, tamaño, material, conductividad, turbidez, oxígeno disuelto, temperatura y presencia de macroinvertebrados y plancton. Los resultados se compararon mediante análisis descriptivos, análisis de componentes principales, dendrogramas de clasificación e índices de diversidad.Resultados. Se encontraron 21 criaderos con larvas de dípteros, 13 con Ae. albopictus; 92% de ellos estaban ubicados en el peridomicilio, en recipientes pequeños o medianos, dispuestos en la sombra, con baja turbidez y conductividad, bajos índices de diversidad para macroinvertebrados y altos para organismos productores de plancton. En el análisis de componentes principales, se encontró correlación significativa con ácaros, oligoquetos y hemípteros (macroinvertebrados), y con bacilarofíceas, clorofíceas y cianofíceas (plancton). En presencia de otros culícidos, las larvas de Ae. albopictus fueron escasas.Conclusión. En este estudio se encontró que las hembras de Ae. albopictus depositan sus huevos en depósitos de agua recién establecidos con disponibilidad suficiente de recurso, baja conductividad y turbidez, y menor competencia intraespecífica e interespecífica

    Methodological proposal to carry out an audit on the causes of post-surgical infections

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    Las infecciones postquirúrgicas son una de las causas más frecuentes incremento de los costos en pacientes hospitalarios, ya que además de la morbi mortalidad implícita, se incrementan sustancialmente los costos, dado por prolongación de la hospitalización o reinternamiento. Ante esta circunstancia, se hace necesario desarrollar instrumentos que permitan evaluar las políticas, estrategias, procesos y operaciones conducentes a la reducción de su incidencia. Se diseñaron dos instrumentos para tal fin; el primero derivado de los Requisitos Esenciales que todo institución de salud en Colombia debe cumplir. El segundo, orientado específicamente a evaluar en calidad y cantidad el cumplimiento de las recomendaciones hechas por el CDC para el control de infecciones en 1999. Estos instrumentos se diseñaron y validaron en el entorno quirúrgico de la Clínica Chicamocha de Bucaramanga, en donde, adicionalmente a la prueba de los mismos, se identificaron las fortalezas y debilidades que en dicha clínica existen en los tópicos relacionados con el tema.INTRODUCCIÓN 1 1. OBJETIVOS 4 2. MARCO CONCEPTUAL 5 2.1 INCIDENCIA 5 2.2 DEFINICIÓN DE INFECCIÓN DE SITIO QUIRÚRGICO 6 2.3 MICROBIOLOGÍA 8 2.4 FACTORES DE RIESGO PARA ISQ 10 2.5 RECOMENDACIONES PARA LA PREVENCION DE ISQ 11 2.5.1 Aspectos preoperatorios 12 2.5.2 Aspectos intraoperatorios 14 2.5.3 Cuidados postoperatorios 16 2.6 VIGILANCIA EPIDEMIOLOGICA 16 3. METODOLOGIA DE DISEÑO Y VALIDACION DE INSTRUMENTOS 19 4. INSTRUMENTOS ORIGINALES 21 4.1 REQUISITOS ESENCIALES 21 4.2 VALORACION DE LAS RECOMENDACIONES PARA EL CONTROL DE INFECCIONES 21 5. VALIDACION DE LOS INSTRUMENTOS 25 5.1 FORMATO DE REQUISITOS ESENCIALES 25 5.1.1 Evaluación de la aplicación 25 5.1.2 Resultados concretos del instrumento 25 5.2 VALORACIÓN DE LAS RECOMENDACIONES PARA EL CONTROL DE INFECCIONES 26 5.2.1 Evaluación de la aplicación 25 5.2.2 Resultados concretos del instrumento 25 6. RECOMENDACIONES 30 BIBLIOGRAFIA 32EspecializaciónPost-surgical infections are one of the most frequent causes of increased costs in hospital patients, since in addition to implicit morbidity and mortality, there is an increase substantially the costs, given by prolongation of hospitalization or readmission. In view of In this circumstance, it is necessary to develop instruments that allow the evaluation of policies, strategies, processes and operations leading to the reduction of its incidence. Two instruments were designed for this purpose; the first derived from the Essential Requirements that every health institution in Colombia must comply. The second, specifically oriented to evaluate in quality and quantity compliance with the recommendations made by the CDC for infection control in 1999. These instruments were designed and validated in the setting surgery at the Chicamocha Clinic in Bucaramanga, where, in addition to the proof of the same, the strengths and weaknesses that exist in said clinic in the topics related to the theme

    Detección de Aedes albopictus (Skuse) (Diptera: Culicidae) en el municipio de Istmina, Chocó, Colombia

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    Introduction: Aedes albopictus is widely distributed around the world. Its introduction to the Americas occurred in 1985 and it is considered a potential vector of dengue viruses and one of the principal vectors of chikungunya virus. In Colombia, this species was reported for the first time in Leticia (Amazonas) in 1998, followed by Buenaventura (Valle del Cauca) in 2001, Barrancabermeja (Santander) in 2010, and Medellín (Antioquia) in 2011. So far, this species has been reported in ten departments of the country. Objective: To report the finding of A. albopictus in the city of Istmina, Chocó, and its implications for public health. Materials and methods: In January 2015, we conducted an inspection of immature stages of Aedes spp. in breeding sites in the neighborhoods of San Agustín, Santa Genoveva and Subestación in Istmina, Chocó. The immature stages collected in this municipality were identified at the Unidad de Entomología of the Laboratorio de Salud Pública Departamental de Chocó, and confirmed by the Laboratorio de Entomología, Red Nacional de Laboratorios, Instituto Nacional de Salud, in Bogotá. Results: In January 2015, twelve A. albopictus larvae were found in the breeding sites located in Subestación and San Agustín neighborhoods. Conclusions: The occurrence of A. albopictus in the municipality of Istmina underlines the importance of strengthening continuous entomological surveillance strategies at national and local levels in the country, especially in Istmina and its surrounding municipalities.Introducción. Aedes albopictus se encuentra ampliamente distribuido en el mundo. Su introducción en las Américas ocurrió en 1985 y se le considera vector potencial de los virus del dengue y uno de los principales vectores del virus del chikungunya. En Colombia, su primer reporte fue en Leticia, Amazonas, en 1998, seguido de Buenaventura, Valle del Cauca, en 2001, Barrancabermeja, Santander, en 2010 y Medellín, Antioquia, en 2011. La especie se ha reportado en diez departamentos del país. Objetivo. Notificar el hallazgo de A. albopictus en el municipio de Istmina, Chocó, y dar cuenta de su importancia en salud pública. Materiales y métodos. En enero de 2015 se inspeccionaron criaderos de los barrios de San Agustín, Santa Genoveva y Subestación del municipio de Istmina para la detección de formas inmaduras de Aedes spp. Las larvas recolectadas fueron identificadas en la Unidad de Entomología del Laboratorio de Salud Pública Departamental de Chocó y confirmadas en el Laboratorio de Entomología de la Red Nacional de Laboratorios del Instituto Nacional de Salud en Bogotá. Resultados. Se encontraron doce larvas de A. albopictus en criaderos ubicados en los barrios Subestación y San Agustín en el municipio de Istmina. Conclusión. La detección de A. albopictus en el municipio de Istmina resalta la importancia del fortalecimiento de las estrategias de vigilancia entomológica continua a nivel municipal y departamental en el país, y especialmente en Istmina y los municipios aledaños

    Assessment of sugarcane cultivars with stable reaction to Xanthomonas albilineans under mechanical inoculation conditions

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    Leaf scald caused by Xanthomonas albilineans in sugarcane is one of the most important diseases around the world since it causes severe losses in both agricultural and industrial yields. In Cuba, resistance to this disease is considered a major selection criterion within the breeding program. The aim of this work was to detect sugarcane cultivars with stable reaction to X. albilineans by using both additive main effects and multiplicative interaction (AMMI) and linear general models. For this, 16 cultivars planted simultaneously in 2015, 2016, and 2017 in two locations: Jovellanos (Matanzas) and Florida (Camagüey) in Cuba were mechanically inoculated with a bacterial isolate previously characterized by sequencing its DNA fragment. Disease severity was recorded in plant cane and first ratoon, and results were consistent in both analyses and revealed that L55-5 and C323-68 were the most susceptible cultivars and C1051-73 was the most resistant; however, C1051-73, C275-80, C86-12, C88-382, C89-147, My5514, and Ty86-28 were the most stable across the years and localities evaluated. Results will allow adapting the methodology for the evaluation of the reaction to leaf scald of new sugarcane cultivars.Fil: La O Hechavarría, María. Instituto de Investigaciones de la Caña de Azúcar; CubaFil: Puchades Izaguirre, Yaquelín. Instituto de Investigaciones de la Caña de Azúcar; CubaFil: Pérez Pérez, Yosel. Instituto de Investigaciones de la Caña de Azúcar; CubaFil: Michavila, Gabriela. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto de Tecnología Agroindustrial del Noroeste Argentino. Provincia de Tucumán. Ministerio de Desarrollo Productivo. Estación Experimental Agroindustrial "Obispo Colombres" (p). Instituto de Tecnología Agroindustrial del Noroeste Argentino; ArgentinaFil: Casas González, Mario A.. Instituto de Investigaciones de la Caña de Azúcar; CubaFil: Pérez Pérez, Juana. Instituto de Investigaciones de la Caña de Azúcar; CubaFil: Carvajal Jaime, Omelio. Instituto de Investigaciones de la Caña de Azúcar; CubaFil: Montalván Delgado, Joaquín. Instituto de Investigaciones de la Caña de Azúcar; CubaFil: Peña Malavera, Andrea Natalia. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto de Tecnología Agroindustrial del Noroeste Argentino. Provincia de Tucumán. Ministerio de Desarrollo Productivo. Estación Experimental Agroindustrial "Obispo Colombres" (p). Instituto de Tecnología Agroindustrial del Noroeste Argentino; ArgentinaFil: Mesa Lopez, José. Instituto de Investigaciones de la Caña de Azúcar; CubaFil: Castagnaro, Atilio Pedro. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto de Tecnología Agroindustrial del Noroeste Argentino. Provincia de Tucumán. Ministerio de Desarrollo Productivo. Estación Experimental Agroindustrial "Obispo Colombres" (p). Instituto de Tecnología Agroindustrial del Noroeste Argentino; ArgentinaFil: Perera, María Francisca. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Tucumán. Instituto de Tecnología Agroindustrial del Noroeste Argentino. Provincia de Tucumán. Ministerio de Desarrollo Productivo. Estación Experimental Agroindustrial "Obispo Colombres" (p). Instituto de Tecnología Agroindustrial del Noroeste Argentino; Argentin

    Clinical and Sociodemographic Determinants of Adherence to World Cancer Research Fund/American Institute for Cancer Research (WCRF/AICR) Recommendations in Breast Cancer Survivors-Health-EpiGEICAM Study

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    Breast cancer (BC) survivors are advised to follow the WCRF/AICR cancer prevention recommendations, given their high risk of developing a second tumour. We aimed to explore compliance with these recommendations in BC survivors and to identify potentially associated clinical and sociodemographic factors. A total of 420 BC survivors, aged 31-80, was recruited from 16 Spanish hospitals. Epidemiological, dietary and physical activity information was collected through questionnaires. A 7-item score to measure compliance with the recommendations was built according to the 2018 WCRF/AICR scoring criteria. Standardized prevalences and standardized prevalence ratios of moderate and high compliance across participant characteristics were estimated using multinomial and binary logistic regression models. The mean score was 3.9 (SD: 1.0) out of 7 points. Recommendations with the worst adherence were those of limiting consumption of red/processed meats (12% of compliance, 95% CI: 8.2-15.0) and high fibre intake (22% of compliance, 95% CI: 17.6-27.0), while the best compliance was observed for the consumption of fruits and vegetables (73% of compliance, 95% CI: 69.2-77.7). Overall, adherence was worse in women with university education and in those with first-degree relatives with BC. This information may be of interest to design and implement personalized preventive measures adapted to the characteristics of these patients.This research was funded by the Fundación Científica Asociación Española Contra el Cancer (AECC) (Scientific Foundation of the Spanish Association against Cancer 2016). This article presents independent research. The views expressed are those of the authors and not necessarily those of the Carlos III Institute of Health.S
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