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Search Results: 1 - 10 of 219885 matches for " Anayansi Valderrama C. "
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Relación entre la composición de especies del género de lutzomyia fran a (diptera: psychodidae, phlebotominae) y los diferentes tipos de bosques en Panamá
Anayansi Valderrama C.,Martha Herrera,Aleyda Salazar
Acta zoológica mexicana , 2008,
Abstract: Algunas especies del género Lutzomyia Fran a son transmisores de la leishmaniasis cutánea y mucocutánea en Panamá. Su distribución está relacionada con la incidencia de casos en lugares rurales colindantes a zonas boscosas, sin embargo la presencia de los vectores puede registrarse en algunas zonas, sin que existan reportes de enfermos. Este estudio se realizó en las localidades de Gamboa, Altos de Campana y Altos Chagres, sitios ubicados dentro de la Cuenca del Canal de Panamá, durante los a os del 2000 al 2001. Los ejemplares se capturaron con trampas CDC miniatura y se trasladaron al Instituto Conmemorativo Gorgas donde se realizaron las identificaciones de las especies y el conteo del número de individuos. Fueron capturados 8,213 individuos del género Lutzomyia, predominando L. ylephiletor (Fairchild & Hertig) (1097 individuos) siendo también la especie más abundante en Altos de Campana, seguida de L.carpenteri (Fairchild & Hertig) (610 individuos), y L. dysponeta (Fairchild & Hertig) (595 individuos). Mediante un análisis de correspondencia simple se relacionaron las especies de Lutzomyia con los tipos de bosques característicos de las áreas de estudios, resultando correspondencia de algunas especies por el tipo de hábitat. En la similitud entre las tres áreas los resultados mostraron que la composición de especies de Phlebotominae en Altos de Campana y Altos Chagres tiene una afinidad de SSo= 0.503. Esta investigación también ha permitido actualizar la información ecológica de las especies de interés médico, con el propósito de tomar medidas preventivas y de control para evitar la proliferación de la Leishmaniasis en estas áreas.
Diversidad de insectos minadores de hojas y formadoras de agallas en el dosel y sotobosque del bosque tropical
Enrique Medianero,Anayansi Valderrama,Héctor Barrios
Acta zoológica mexicana , 2003,
Abstract: Con el proposito de estimar en que estrato del bosque tropical ocurre mayor diversidad de especies de insectos formadores de agallas y minadores de hojas, se realizaron muestreos desde marzo de 1997 a mayo de 1998 en dos bosques de la República de Panamá (Parque Natural Metropolitano y Fuerte Sherman). Nuestros resultados indican que en el dosel de ambos bosques existe mayor riqueza de insectos formadores de agallas y minadores de hojas que en el sotobosque, siendo la proporción de especies de estos dos grupos en el dosel y sotobosque de 2:1 respectivamente. El índice alfa de Fisher indica que los dos grupos de insectos son más diversos en el dosel de los dos bosques que en el sotobosque, siendo el dosel del Fuerte Sherman donde ocurre mayor abundancia de algunas morfoespecies
Anthropogenic influence on the distribution, abundance and diversity of sandfly species (Diptera: Phlebotominae: Psychodidae), vectors of cutaneous leishmaniasis in Panama
Valderrama, Anayansi;Tavares, Mara Garcia;Andrade Filho, José Dilermando;
Memórias do Instituto Oswaldo Cruz , 2011, DOI: 10.1590/S0074-02762011000800021
Abstract: in panama, species of the genus lutzomyia are vectors of american cutaneous leishmaniasis (acl). there is no recent ecological information that may be used to develop tools for the control of this disease. thus, the goal of this study was to determine the composition, distribution and diversity of lutzomyia species that serve as vectors of acl. sandfly sampling was conducted in forests, fragmented forests and rural environments, in locations with records of acl. lutzomyia gomezi, lutzomyia panamensis and lutzomyia trapidoi were the most widely distributed and prevalent species. analysis of each sampling point showed that the species abundance and diversity were greatest at points located in the fragmented forest landscape. however, when the samples were grouped according to the landscape characteristics of the locations, there was a greater diversity of species in the rural environment locations. the kruskal wallis analysis of species abundance found that lu. gomezi and lu. trapidoi were associated with fragmented environments, while lu. panamensis, lutzomyia olmeca bicolor and lutzomyia ylephiletor were associated with forested environments. therefore, we suggest that human activity influences the distribution, composition and diversity of the vector species responsible for leishmaniasis in panama.
Report of Lutzomyia longipalpis (Lutz & Neiva, 1912) (Diptera: Psychodidae: Phlebotominae) in a cutaneous-leishmaniasis-endemic area of Panama
Valderrama, Anayansi;Tavares, Mara Garcia;Andrade Filho, José Dilermando;
Memórias do Instituto Oswaldo Cruz , 2011, DOI: 10.1590/S0074-02762011000800025
Abstract: lutzomyia longipalpis is the primary vector of the parasite responsible for visceral leishmaniasis in the americas. in the present study, lu. longipalpis was found in a domiciliary area in limón, a district in capira, a region in which cutaneous leishmaniasis is endemic in panama. previously, this species has been found in a humid forest in this same region. finding lu. longipalpis in domiciliary areas indicates that this species may be adapting to new habitats and that it may play a role in the transmission of leishmaniasis in panama.
Changes in Phlebotomine Sand Fly Species Composition Following Insecticide Thermal Fogging in a Rural Setting of Western Panamá
Jose E. Calzada, Azael Salda?a, Chystrie Rigg, Anayansi Valderrama, Luz Romero, Luis Fernando Chaves
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0053289
Abstract: American Cutaneous Leishmaniasis, ACL, is a zoonotic disease with a large richness of co-occurring vector species in transmission foci. Here, we describe changes in patterns of phlebotomine sand fly (Diptera: Psychodidae: Phlebotominae) species composition at the village of Trinidad de Las Minas, Capira, Panamá, a hyperendemic focus of ACL transmission, subjected to a vector control intervention with insecticide thermal fogging (ITF). Our study setting consisted of 24 houses, 12 subjected to two rounds of ITF and 12 kept as control. During 15 months (April 2010– June 2011) we monitored sand fly species composition and abundance with modified HP light traps inside (domicile) and outside (peridomicile) the studied houses. From 5628 sand flies collected, we were able to identify 5617 of the samples into 24 species, a number of species close to 25±1.6, the estimate from the Chao2 Index. The most abundant species were Lutzomya trapidoi (20%), Lu. gomezi (20%) and Lu. triramula (20%). Cluster analyses showed that most of the 24 houses had high similarity in relative abundance patterns of the six most common species, with only few peripheral houses not following the main cluster pattern. We also found that species richness was decreased to 22 species in the fogged houses, of which only 19 were found in the domiciliary environment. Changes in species richness were especially notorious at the end of the wet season. Our results suggest that species richness can decrease following ITF in domiciliary environments, primarily affecting the less common species.
Increasing Woody Species Diversity for Sustainable Limestone Quarry Reclamation in Canada
Anayansi C. Cohen-Fernandez,M. Anne Naeth
Sustainability , 2013, DOI: 10.3390/su5031340
Abstract: Environmental sustainability of post mined limestone quarries often requires reclamation to a diverse woody plant community. Woody species diversity may be severely limited if only nursery stock is relied on for propagation material; thus other sources must be evaluated. To address woody species establishment and survival from different propagule sources at a limestone quarry in western Canada, native trees (4) and shrubs (3) were seeded and transplanted into amended substrates (wood shavings, clean fill, unamended control) in two seasons (spring, fall). Plant sources were nursery stock, local forest wildlings, seeds and forest soil (LFH mineral soil mix). Plant emergence, survival, height, health and browsing were evaluated over four years. Survival was greater with fall transplanted seedlings than with spring transplanted. Survival was greater for Picea glauca, Pseudotsuga menziesii and Populus tremuloides from nursery than local source stock. Seedlings from seeds and LFH did not survive for any of the species. Growth and survival were affected by bighorn sheep. Amendments did not improve plant establishment. Diversity of the woody plant community was increased at the quarry in spite of the severe conditions.
Radio y responsabilidad social en Colombia
Jairo Enrique Valderrama Valderrama,César Mauricio Velásquez Ossa
Palabra Clave , 2004,
Abstract: La influencia actual de los medios masivos de comunicación en la conducta de los jóvenes se constituye en una alerta sobre la necesidad de indagar en los procesos que inciden en este fenómeno. La radio juvenil en Colombia, en este caso, sirve como modelo para evidenciar el cambio en los recursos utilizados para llegar a este tipo de audiencia. El Observatorio de Medios de la Facultad de Comunicación Social y Periodismo de la Universidad de La Sabana, encuestó a estudiantes del último grado de educación secundaria de colegios públicos y privados, y a universitarios de Bogotá. De esta manera, se estableció su percepción acerca de los contenidos de los programas juveniles de radio, que no siempre reciben el respaldo de educadores y padres de familia, porque dicen ellos-- tales emisiones omiten su deber en la formación integral de este segmento de la población. El resultado del estudio se dirige a demandar de los due os de medios, directores, publicistas, padres de familia, educadores y anunciantes una participación activa en la construcción de una sociedad que apunte al bien común.
História da parturi??o no Brasil, século XIX
Brenes, Anayansi Correa;
Cadernos de Saúde Pública , 1991, DOI: 10.1590/S0102-311X1991000200002
Abstract: this research aimed at recovering the peculiarities of the development of obstetrical art in brazil during xix century, starting in 1808, when a legal act signed by d. jo?o vi included this discipline in the initial curriculum of the schools of medicine and surgery founded in bahia and rio de janeiro. research was undertaken through the review of 83 medical theses in the field of obstetrics, produced in bahia and rio de janeiro in xix century. the data showed that obstetrical art was traditionally performed by women called "aparadeiras" (catchers) or "comadres", who cared for women before, during and after delivery, and provided assistance in other situations, like venereal diseases and abortion. the inclusion of physicians-obstetricians in this practice led not only to a scrutinizing of the female body, but also to the production of an anatomical and physiological knowledge of the female organism from a male standpoint.
Huella del Carbono. Parte 2: La Visión de las Empresas, los Cuestionamientos y el Futuro
Espíndola,César; Valderrama,José O;
Información tecnológica , 2012, DOI: 10.4067/S0718-07642012000100018
Abstract: in this second part of the series, the viewpoint of the enterprises and their position with respect to the implementation of carbon footprint (cfp) quantification. the criteria for classification of emissions and the main methodologies for calculating the cfp are discussed and analyzed. the main questions and doubts about the cfp, on the subjects to be discussed and the alternatives of solution. a comparison of the main four methods currently used for determining the cfp and a method named abacus for quantifying emissions of equivalent co2 that allows identifying the common characteristics to all of them. all this can serve as basis for decision-making to adopt a given methodology. it is concluded that if the present situation of confusion of the different approaches to quantify the cfp continues, the companies and governments are loosing a great opportunity to arrive to a new environmentally sustainable economy.
Huella del Carbono. Parte 1: Conceptos, Métodos de Estimación y Complejidades Metodológicas
Espíndola,César; Valderrama,José O;
Información tecnológica , 2012, DOI: 10.4067/S0718-07642012000100017
Abstract: the concept of carbon footprint, its origin, its relation with greenhouse gases and the methods to quantify it are presented and analyzed. the so-called greenhouse effect causes that the energy that reaches the earth at a certain rate is returned to a slower rate, increasing the temperature of the earth surface. additionally, it is nowadays accepted that this effect is produced by some gases that are naturally emitted or produced by human actions. the carbon footprint is considered to be one of the most important tools for quantifying greenhouse emissions and in a general form it represents the quantity of gases emitted to the atmosphere and that is produced by human activities, and by goods and service consumption. since there is no consensus about the definition of carbon footprint or the forms of quantifying it, this first part of the paper series analyzes the main concept and the main present views on the carbon footprint.
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