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Search Results: 1 - 10 of 412547 matches for " Nelda M. Carbonell Castro "
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Alta infestación por varroa (Varroasis) y su respuesta al utilizar el panal trampa - Hight infestation by Varroa (Varroasis) and their answer to use honeycomb trap
Y. J. Mendoza Falcón,R. O. Borges Maga?a,Nelda M. Carbonell Castro
REDVET , 2012,
Abstract: RESUMENEl ácaro Varroa destructor parasita a todas las castas de abejas, constituyendo la principal plaga que afecta a la apicultura mundial, provocando altas mortalidades.ABSTRACTThe parasitic mite Varroa destructor parasites all castes of bees, constituting the major pest affecting apiculture worldwide, causing high mortality.
Necrosis en postlarvas de camarón - Necrosis′s in post larva of shrimp
R.O. Borges Maga?a,Y. J. Mendoza Falcón,Nelda M Carbonell Castro
REDVET , 2012,
Abstract: ResumenLa necrosis, en larvas de cultivo, ha sido responsable de grandes pérdidas económicas para los camaronicultores de varias partes del mundo, al afectar principalmente a la especie de Litopenaeus vannamei.AbstractThe necrosis, in cultivation larvas, has been responsible for big economic losses for shrimp cultivators in several parts of the world, when affecting mainly to the cultivations of Litopenaeus vannamei.
Origen y filogenia de los primeros homínidos de Europa
J.M. Bermúdez de Castro,M. Martinón-Torres,E. Carbonell,M. Lozano
Munibe Antropologia-Arkeologia , 2005,
Abstract: Se discuten el origen y relaciones filogenéticas de la especie Homo antecesor, Bermudez de Castro et al.., 1997, con especial atención a los datos aportados por la nueva mandíbula recuperada en el nivel TD6 del yacimiento de Gran Dolina, en la Sierra de Atapuerca, que refuerzan la identidad taxonómica de esta especie y su relación con el origen de H. sapiens. Se constata la hipótesis de que H. antecessor represente el último antecesor común de los neandertales y de las poblaciones modernas y se considera la posibilidad de un origen asiático para el primer poblamiento de Europa
Comparación entre el cuestionario "ICIQ-UI Short Form" y el "King's Health Questionnaire" como instrumentos de evaluación de la incontinencia urinaria en mujeres
Espu?a Pons,M.; Castro Díaz,D.; Carbonell,C.; Dilla,T.;
Actas Urológicas Espa?olas , 2007, DOI: 10.4321/S0210-48062007000500010
Abstract: introduction: in our country there are a few available instruments to diagnose urinary incontinence (ui) from the patient's perspective. the king's health questionnaire (khq) and the "international consultation on incontinence questionnaire-urinary incontinence short form" (iciq-ui sf) are the most widespread among that. the present study aimed to compare the clinical utility between khq and iciq-ui sf with regard to the urodynamic test. material and methods: cross-sectional study performed in 116 women who completed the iciq-ui sf, the khq and the urodynamic test and were diagnosed according to each test. sensibility and specificity values of symptom dimension of the iciqui sf and the khq were analyzed with regard to the urodynamic test. in addition, correlation scores between the both compared measures were calculated. results: mean age (sd) of women was 54 years (sd= 13.99). khq and iciq-ui sf mean scores were 39.93 (22.11) and 13.76 (4.11), respectively. correlation between both measures was moderated (r= 0.6; p<0.001). percentages of pts with symptoms suggesting stress ui (sui), urge ui (uui) and mixed ui (mui) according to each instrument were: 33.7, 17.3 & 49 (khq); 40.4, 15.4 & 44.2 (iciq-ui sf). patients' distribution according to urodynamic test was: sui 41.3%, uui 20.2%, mui 26.9% and 11.5% with other diagnosis. sensibility and specificity values of both questionnaires were very similar, but feasibility was worse for the khq (7.76% of pts did not complete the questionnaire) than for the iciq-ui sf (2.59% did not complete the questionnaire). conclusions: because of its better feasibility, clinical use of iciq-ui sf is recommended against khq for ui evaluation.
Paleodemografía del hipodigma de fósiles de homininos del nivel TD6 de Gran Dolina (Sierra de Atapuerca, Burgos): estudio preliminar
Bermúdez de Castro, J. M.,Carbonell, E.,Gómez, A.,Mateos, A.
Estudios Geologicos , 2006, DOI: 10.3989/egeol.0662114
Abstract: The Aurora Stratum of the TD6 level of the Pleistocene site of Gran Dolina (Trinchera del Ferrocarril, Sierra de Atapuerca, Burgos, Spain) have yielded more than one hundred human fossil remains, of the species Homo antecessor and belonging to a minimum (MNI) of nine individuals. In this paper we made the MNI determination and the age at death of the individuals, using data observed in the mandibular, maxillary, and dental remains. The previous taphonomic analysis concluded that the origin of the hominin accumulation was due to a punctual or recurrent episode of gastronomic cannibalism. Our analysis revealed that most individuals (N = 7) are immature between three and thirteen, whereas two are young adults between fifteen and eighteen. Considering this peculiar mortality distribution, alternative hypotheses on the possible scenarios in which hominins were apprehended, as well as the implications for the human behaviour in the Pleistocene are discussed. En el Estrato Aurora del nivel TD6 del yacimiento pleistoceno de Gran Dolina (Trinchera del Ferrocarril, Sierra de Atapuerca, Burgos) se han obtenido más de cien restos fósiles de homininos de la especie Homo antecessor, que pertenecen a un mínimo (NMI) de nueve individuos. En este trabajo realizamos la determinación del NMI y de la edad de muerte de los individuos, empleando datos observados en los restos de mandíbula, maxilar y dientes. El análisis tafonómico previo concluyó que el origen de la acumulación de los restos de homininos fue un acto puntual o recurrente de canibalismo de tipo gastronómico . Nuestro análisis revela que la mayor parte de los individuos (n = 7) son inmaduros, de entre tres y trece a os, mientras que dos son adultos jóvenes, de entre quince y dieciocho a os. En función de esta peculiar distribución de mortalidad se discuten hipótesis alternativas sobre los escenarios en los que los homininos fueron aprehendidos y las implicaciones que ello conlleva para el comportamiento de las poblaciones del Pleistoceno inferior.
Reparación e impermeabilización de las juntas de la presa de Cavallers, en los pirineos de Lérida-Espa a
Carbonell De Masy, M.
Informes de la Construccion , 1989,
Abstract: The problems with reinforced concrete and their repair are undoubtedly of great interest nowadays throughout the world. The problems of the reinforced concrete of the buttress dam in the Catalonian Pyrenees are considered in this article. Said problems led to a loss of 60 liters of water/sec. The technical solution to the problem is explained, as well as how it was carried out at temperatures of around O °C. Part of the repair work was done in the Spring of 1984, and the remainder at the beginning of 1985. The years which have elapsed confirm the effectiveness of the treatment. La patología del hormigón armado y su reparación, no cabe duda que es un tema de actualidad a nivel mundial. En este informe se expone la problemática planteada en el hormigón armado de una presa de contrafuertes, en los Pirineos de Lérida, que ocasionaba una pérdida de agua de 60 I/segundo, la solución técnica dada y su proceso de ejecución a temperaturas del orden de O °C. Una parte de la reparación fue llevada a cabo en la primavera de 1984 y, el resto, a principios de 1985. Los a os transcurridos están confirmando la eficacia del tratamiento.
Bioprospection of marine microorganisms: biotechnological applications and methods
Dionisi,Hebe M; Lozada,Mariana; Olivera,Nelda L.;
Revista argentina de microbiolog?-a , 2012,
Abstract: environmental microorganisms constitute an almost inexhaustible reserve of genetic and functional diversity, accumulated during millions of years of adaptive evolution to various selective pressures. in particular, the extent of microbial biodiversity in marine habitats seems to grow larger as new techniques emerge to measure it. this has resulted in novel and more complex approaches for the screening of molecules and activities of biotechnological interest in these environments. in this review, we explore the different partially overlapping biotechnological fields that make use of microorganisms and we describe the different marine habitats that are particularly attractive for bioprospection. in addition, we review the methodological approaches currently used for microbial bioprospection, from the traditional cultivation techniques to state of the art metagenomic approaches, with emphasis in the marine environment.
Bioprospection of marine microorganisms: potential and challenges for Argentina Bioprospección de microorganismos marinos: potencialidades y desafíos para Argentina
Hebe M Dionisi,Mariana Lozada,Nelda L Olivera
Revista argentina de microbiolog?-a , 2012,
Abstract: The marine environments of Argentina have a remarkable extension, as well as high biological productivity and biodiversity of both macro- and microorganisms. Despite having a great potential for biotechnological applications, the microorganisms inhabiting these ecosystems remain mostly unexplored and unexploited. In this review, we study the research topics and the interactions among Argentinean laboratories, by analyzing current articles published on biotechnology-related marine microbiology by researchers of this country. In addition, we identify the challenges and opportunities for Argentina to take advantage of the genetic potential of its marine microorganisms. Finally, we suggest possible actions that could improve the development of this research field, as well as the utilization of this knowledge to solve societal needs. El medio ambiente marino de la Argentina tiene una notable extensión, como así también una alta productividad biológica y biodiversidad de macro y microorganismos. A pesar de presentar un gran potencial para aplicaciones biotecnológicas, los microorganismos que habitan estos ecosistemas permanecen mayormente inexplorados y sus propiedades aún no explotadas. En este trabajo de revisión, estudiamos los temas de investigación y las interacciones entre grupos de investigación argentinos, por medio del análisis de los artículos publicados hasta el momento en temáticas relacionadas con la aplicación biotecnológica de microorganismos marinos. Además, identificamos los desafíos y las oportunidades para que la Argentina tome ventaja del potencial genético de sus microorganismos marinos. Por último, sugerimos posibles acciones que podrían mejorar el desarrollo de este campo de estudio, como así también la utilización de este conocimiento para resolver las necesidades de la sociedad.
Effect of Ascaris Lumbricoides specific IgE on tuberculin skin test responses in children in a high-burden setting: a cross-sectional community-based study
van Soelen Nelda,Mandalakas Anna M,Kirchner H,Walzl Gerhard
BMC Infectious Diseases , 2012, DOI: 10.1186/1471-2334-12-211
Abstract: Background M.tuberculosis (M.tb) is associated with enhanced T helper cell type 1 (Th1) immune responses while helminth infection is associated with T helper cell type 2 (Th2) immune responses. Our aim was to investigate whether helminth infection could influence the ability to generate an appropriate Th1 immune response that is characterized by a positive tuberculin skin test (TST), in M.tb exposed children. Methods We completed a community-based, cross sectional household contact tracing study, using matched enrolment of HIV negative children with and without documented household M.tb exposure. We documented demographics, clinical characteristics, HIV status, M.tb exposure (using a standard contact score) and M.tb infection status (TST > = 10 mm). Ascaris lumbricoides-specific IgE was used as proxy for Ascaris infection/exposure. Results Of 271 children (median age 4 years (range: 4 months to 15 years)) enrolled, 65 participants (24%) were serum positive for Ascaris IgE. There were 168 (62%) children with a documented household tuberculosis contact and 107 (40%) were (TST) positive overall. A positive TST was associated with increasing age (Odds Ratio (OR) =1.17, p < 0.001), increasing M.tb contact score (OR = 1.17, p < 0.001), previous tuberculosis treatment (OR = 4.8, p = 0.06) and previous isoniazid preventive treatment (OR = 3.16, p = 0.01). A visible bacillus Calmette-Guérin (BCG) scar was associated with reduced odds of being TST positive (OR = 0.42, p = 0.01). Ascaris IgE was not associated with TST status in univariate analysis (OR = 0.9, p = 0.6), but multivariable logistic regression analysis suggested an inverse association between Ascaris IgE status and a positive TST (OR = 0.6, p = 0.08), when adjusted for age, and M.tb contact score. The addition of an age interaction term to the model suggested that the age effect was stronger among Ascaris IgE positive children; the effect of being Ascaris IgE positive significantly reduced the odds of being TST positive amongst younger children while this effect weakened with increasing age. Conclusions Our preliminary findings highlight a high prevalence of both Ascaris exposure/infection and M.tb infection in children in an urban setting. Helminth exposure/infection may reduce the immune response following M.tb exposure when controlling for epidemiological and clinical covariates. These findings might be relevant to the interpretation of immunological tests of M.tb infection in children.
Influencia de las condiciones ambientales en el comportamiento de un deshumidificador desecante. Parte I+
T. Carbonell Morales,M. DePaepe
Revista de Ingeniería Mecánica , 2009,
Abstract: Un estudio experimental ha sido llevado a cabo en una rueda desecante con el objetivo de mostrar la influencia de las condiciones ambientales, en el comportamiento de este sistema. Temperatura, humedad relativa fueron medidas y se muestran los perfiles de estos parámetros en el proceso de deshumidificación. La información experimental obtenida fue comprada con los datos reportados por otros autores que estudian este tema.An experimental study was carried out in a desiccant wheel. Temperature and relative humidity were measured to study their influence on the behavior of the desiccant wheel. The temperature and humidity profiles during the dehumidification process were obtained and compared with the information reported by other authors.
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