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Search Results: 1 - 10 of 215086 matches for " Deisy L. Toloza-Moreno "
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CONCENTRACIóN Y COMPOSICIóN MICROBIANA EN EL AMBIENTE DE LA BIBLIOTECA CENTRAL JORGE PALACIOS PRECIADO DE LA UNIVERSIDAD PEDAGóGICA Y TECNOLóGICA DE COLOMBIA, TUNJA, COLOMBIA MICROBIAL CONCENTRATION AND COMPOSITION IN THE ENVIRONMENT OF THE JORGE PALACIOS PRECIADO CENTRAL LIBRARY OF THE UNIVERSIDAD PEDAGóGICA Y TECNOLóGICA DE COLOMBIA, TUNJA, COLOMBIA
Deisy L. Toloza-Moreno,Luz M. Lizarazo-Forero,Jorge O. Blanco-Valbuena
Actualidades Biológicas , 2012,
Abstract: Los microorganismos, esporas, ácaros y polen son componentes naturales del aire en ambientes internos y pueden ser transportados desde el exterior por partículas aerobiológicas que pueden establecerse en el polvo y causar el biodeterioro de diversos materiales, además de representar un riesgo para la salud de las personas. Con este trabajo, se evaluó la concentración microbiana en el ambiente de la Biblioteca Central Jorge Palacios Preciado, Universidad Pedagógica y Tecnológica de Colombia. Se empleó el método de sedimentación en placa para realizar el muestreo microbiológico del ambiente, utilizando agar Sabouraud para el aislamiento de hongos y agar nutritivo para bacterias. La densidad microbiana del ambiente se encontró dentro de los límites de sanidad aceptados para ambientes de lugares públicos, y la mayor diversidad identificada estuvo representada por 34 géneros de hongos filamentosos y un grupo de hongos de la clase Phycomycetes, siendo las esporas de los géneros Cladosporium, Paecilomyces y Penicillium, las más frecuentes en la biblioteca. Las levaduras fueron las menos representativas en el ambiente con dos géneros aislados Candida y Rhodotorula. En cuanto a las bacterias, se aislaron en total 16 géneros, de los cuales Bacillus y Neisseria, fueron los más comunes. Teniendo en cuenta los géneros microbianos aislados y las investigaciones más recientes, el ambiente de la Biblioteca Central podría representar un riesgo para la salud de las personas, principalmente a nivel respiratorio, sino se adoptan algunas medidas de limpieza y de adecuación de los sistemas de ventilación. Microorganisms, spores, acari, and pollen are natural components of indoor air and they may be transported from the outdoor air by aerobiological particles that settle on dust and cause the biodeterioration of various materials, in addition to representing a risk for human health. In this study, we evaluated the microbial concentration in the environment of the ''Jorge Palacios Preciado'' Central Library of the Universidad Pedagógica y Tecnológica of Colombia. The open petri dish sedimentation method was used for the microbiological sampling of the environment, using Sabouraud agar for isolating fungi and nutrient agar for bacteria. Microbial density of this environment was found to be within sanitary levels accepted for environments of public buildings, and the greatest diversity was comprised of filamentous fungi, with 34 genera identified, along with a fungal group from the Class Phycomycetes, with Cladosporium, Penicillium, and Paecilomyces spores the most frequent in t
AEROMICROBIOLOGíA DEL ARCHIVO CENTRAL DE LA UNIVERSIDAD PEDAGóGICA Y TECNOLóGICA DE COLOMBIA (TUNJA-BOYACá)
TOLOZA-MORENO,DEISY LISSETH; LIZARAZO-FORERO,LUZ MARINA;
Acta Biológica Colombiana , 2011,
Abstract: air quality of indoor environments can be influenced by different particles suspended in the atmosphere (dust, pollen, bacteria, fungi, and virus) that could cause damage to documents and induce allergic reactions in people working with these documents. in this work, we identified until genera the microorganisms present in the environment of the central archive of universidad pedagógica y tecnológica de colombia; specifically those that could cause respiratory allergies to personnel of this area. for the environment samples, we used the open petri dish sedimentation method using potato dextrose agar, and measured temperature and relative humidity during each sampling. also, a survey was taken of the workers to record respiratory symptoms that could arise from handling documents. samples were taken from the nostrils of some of these workers. fourteen genera among fungi, yeasts, and bacteria, and two non identified categories were isolated from the environment. the predominant fungal genera were mucor spp. and penicillium spp. with 36.6% and 27.5% of the total of isolated colonies, respectively. yeast, mainly rhodotorula genera, and bacteria with prevalence coccus forms were isolated in smaller proportions. there was not statistically significant correlation among the average of colony forming units and the temperature and relative humidity in the environment. in addition, nostril samples yielded only normal microbiota of the nose, indicating that suggestive respiratory symptoms workers presented are not directly influenced by the presence of fungal spores in the environment at the central archive.
AEROMICROBIOLOGíA DEL ARCHIVO CENTRAL DE LA UNIVERSIDAD PEDAGóGICA Y TECNOLóGICA DE COLOMBIA (TUNJA-BOYACá)
Toloza Moreno Deisy Lisseth,Lizarazo Forero Luz Marina
Acta Biológica Colombiana , 2011,
Abstract: La calidad del aire de los ambientes internos puede estar influenciada por distintas partículas suspendidas en la atmósfera (polvo, polen, bacterias, hongos, virus) que pueden causar da os sobre los documentos y causar reacciones alérgicas sobre las personas que trabajan con éstos. Con este trabajo, se identificaron los microorganismos presentes en el ambiente del archivo central de la Universidad Pedagógica y Tecnológica de Colombia, que podrían causar alergias respiratorias en los trabajadores de esta área. Para las muestras de ambiente se empleó el método de sedimentación en placa utilizando Agar Papa Dextrosa, y se midió la temperatura y humedad relativa durante cada muestreo. Asimismo, se aplicó una encuesta a los trabajadores con el fin de conocer la sintomatología respiratoria sugestiva que podrían presentar por el manejo de los documentos y se tomaron muestras de fosas nasales a algunos de ellos. Se aislaron del ambiente 16 géneros entre hongos, levaduras y bacterias. Los géneros fúngicos predominantes fueron Mucor sp. y Penicillium sp., con un 36,6% y 27,5% respectivamente del total de colonias aisladas. Las formas levaduriformes y bacterianas fueron aisladas en menor proporción. No se encontró una correlación estadísticamente significativa entre el promedio de unidades formadoras de colonia con la temperatura y humedad relativa del ambiente. Además, en las muestras de fosas nasales solo se encontró flora normal de la nariz, lo cual indica que los síntomas respiratorios sugestivos que presentan los trabajadores no están influenciados directamente por la presencia de esporas de hongos en el ambiente del archivo central.
LEUCOENCEFALOPATíA QUíSTICA NO MEGALENCEFáLICA VS. ENCEFALOPATíA HIPOXICOISQUéMICA: DIFICULTADES EN EL ASESORAMIENTO GENéTICO Non-megalencephalic cystic leukoencephalopathy compared to hypoxic ischemic encephalopathy: difficulties in geneticassessment
Deisy Rincón,Luz ángela Moreno,Yenifeth Bello,Harvy Velasco
Revista Facultad de Medicina de la Universidad Nacional de Colombia , 2012,
Abstract: Existen varias enfermedades que alteran la conformación de la mielina. éstas se clasifican en Leucoencefalopatías primarias y secundarias, algunas de ellas con características clínicas, radiológicas, bioquímicas y moleculares que permiten realizar una aproximación diagnóstica. Pese a ello, muchas de éstas tienen cuadros clínicos similares y ya que no se cuenta con ayudas diagnósticas para todas estas patologías, se hace complejo realizar un diagnóstico diferencial. Se presenta el análisis del asesoramiento genético de una pareja con antecedentes de una hija con cuadro de leucoencefalopatía en quien se sospecha una Leucoencefalopatía Quística No Megalencefalica (Leucoencefalopatía primaria) versus una LeucoencefalopatíaHipóxicoIsquemica (Leucoencefalopatía secundaria), donde no se logró llegar a un diagnóstico confirmado por la ausencia de herramientas diagnósticas, sobretodo de índole molecular. Desde esta perspectiva, el asesoramiento genético en esta paciente se constituye en un gran reto para el grupo multidisciplinario que maneja este tipo de casos. Several diseases alter myelin formation; they are classified into primary and secondary leukoencephalopathies, some of them having clinical, radiological, biochemical and molecular characteristics enabling a diagnostic approach. In spite of this, making a differential diagnosis becomes complicated as many of them have similar clinical pictures and there is a lack of diagnostic aids for all such pathologies. This article analyses the genetic counselling provided for a pair whose background consisted of a daughter having a picture of leukoencephalopathy in whom non-megalencephalic cystic leukoencephalopathy (primary leukoencephalopathy) was suspected as opposed to hypoxic ischemic leukoencephalopathy (secondary leukoencephalopathy), as a confirmed diagnosis could not be reached due to a lack of diagnostic tools, particularly molecular ones. Genetic counselling for this patient thus became a great challenge for the multidisciplinary group managing this type of case.
A Comparative Study of Relational Learning Capacity in Honeybees (Apis mellifera) and Stingless Bees (Melipona rufiventris)
Antonio Mauricio Moreno, Deisy das Gra?as de Souza, Judith Reinhard
PLOS ONE , 2012, DOI: 10.1371/journal.pone.0051467
Abstract: Background Learning of arbitrary relations is the capacity to acquire knowledge about associations between events or stimuli that do not share any similarities, and use this knowledge to make behavioural choices. This capacity is well documented in humans and vertebrates, and there is some evidence it exists in the honeybee (Apis mellifera). However, little is known about whether the ability for relational learning extends to other invertebrates, although many insects have been shown to possess excellent learning capacities in spite of their small brains. Methodology/Principal Findings Using a symbolic matching-to-sample procedure, we show that the honeybee Apis mellifera rapidly learns arbitrary relations between colours and patterns, reaching 68.2% correct choice for pattern-colour relations and 73.3% for colour-pattern relations. However, Apis mellifera does not transfer this knowledge to the symmetrical relations when the stimulus order is reversed. A second bee species, the stingless bee Melipona rufiventris from Brazil, seems unable to learn the same arbitrary relations between colours and patterns, although it exhibits excellent discrimination learning. Conclusions/Significance Our results confirm that the capacity for learning arbitrary relations is not limited to vertebrates, but even insects with small brains can perform this learning task. Interestingly, it seems to be a species-specific ability. The disparity in relational learning performance between the two bee species we tested may be linked to their specific foraging and recruitment strategies, which evolved in adaptation to different environments.
Three Uncommon Seaweeds of the Pacific Coast of Mexico  [PDF]
A. Catalina Mendoza-González, Luz Elena Mateo-Cid, Deisy Yazmín García-López
American Journal of Plant Sciences (AJPS) , 2015, DOI: 10.4236/ajps.2015.619310
Abstract: This report describes a new record and two unusual and rare species of marine algae collected from Oaxaca, Michoacán, Jalisco and Baja California Sur at Mexican Pacific coast. Boodleopsis verticillata is the first record in the Pacific shore of Mexico, in the case of Melobesia polystromatica, this is the sixth record at tropical Pacific while Litholepis sonorensisis reported for the third time in the Gulf of California. These results suggest that the taxonomic inventory of seaweed in the Pacific coast of Mexico is not yet complete, so attention must be given to the epiphytes, and other small and delicate species that inhabit the coast of Mexico. Morphological descriptions, distributional range, reproductive stage and samples examined are included.
MAGELLAN PEAT (Sphagnum magallanicum) AS NATURAL ADSORBENT OF RECALCITRAN SYNTHETIC DYES
Sepulveda-Cuevas,Luisa A; Contreras-Villacura,Elsa G; Palma-Toloza,Carolyn L;
Revista de la ciencia del suelo y nutrición vegetal , 2008, DOI: 10.4067/S0718-27912008000200005
Abstract: colour abatement is a complex problem because the synthetic origin of the dyes used in the industry. the purpose of this study is to evaluate the feasibility of using magellan peat (sphagnum magallanicum) as an adsorbent of textile dyes, determining the physical-chemical characteristics of the peat by measuring the adsorptive capacity of the dyes as well as exploring the degrading potential of the native microorganisms they contain. the results obtained indicate that the peat has a specific surface area (bet) and a volume of 144.3 m2 g-1 and 60% of meso- and macropores, respectively. the basicity of the peat surface is superior to acidity and the ph in which the neutrality is reached is about 3.1. equilibrium concentrations for the basic, acid and reactive dyes in the solid and liquid phases were appropriately interpreted by the langmuir model; however the maximum adsorption capacities of the first ones were significantly higher. if the solution ph is lower to pzpc, the absorption capacity of the acid dyes increases. three different bacteria colonies with decolourization capacity were isolated. in conclusion, results indicate that the peat may be successfully applied in the detoxification of textile effluents.
Tumores de los anexos oculares
Gómez Cabrera,Clara G.; Toro Toloza,Isaías; Vigoa Aranguren,Lázaro;
Revista Cubana de Oftalmolog?-a , 2001,
Abstract: a retrospective study of 211 patients that were operated on for presenting some adnexa tumors with histologic confirmation from january, 1993, to december, 1997, was made. 53.5 % of the patients were females. 48.4 % were black. 13.3 % were under 20, 36 % were between 20 and 49 and 50.7 % were over 50. 61.1 % of the tumors were localized in the eyelids. the prevailing clinical signs were volume increase (56.9 %), pigmentation increase (23.71 %), vascularization (21.8 %) and ulceration (7.1 %). 61.6 % of the patients were asymptomatic. we found 14 histologic types of tumors in the eyelids and 15 in the conjunctiva. there were no significant differences as regards sex and type of tumor. most of the cases were observed among the black, whereas the group of highest incidence was that of patients aged 50 and over. the eyelids were the chief anatomical localization. the most important clinical sign was the volume increase and most of the patients were asymptomatic. the eyelid tumors of highest incidence were the inclusion cysts, followed by the basocelular carcinoma and the granuloma. the nevus, the spinocellular carcinoma and the granuloma were remarkable in the conjunctiva.
Tumores de los anexos oculares Ocular adnexa tumors
Clara G. Gómez Cabrera,Isaías Toro Toloza,Lázaro Vigoa Aranguren
Revista Cubana de Oftalmolog?-a , 2001,
Abstract: Se realizó un estudio retrospectivo de 211 pacientes, operados por presentar alguna tumoración de los anexos, con confirmación histológica en el período comprendido entre enero de 1993 hasta diciembre de 1997. El 53,5 % de los pacientes fueron del sexo femenino. El 48,4 % eran mestizos. El 13,3 % de los pacientes eran menores de 20 a os, el 36 % entre 20 y 49 y el 50,7 % más de 50 a os. El 61,1 % de los tumores se localizaron en los párpados. Los signos clínicos que prevalecieron fueron el aumento de volumen (56,9 %), aumento de la pigmentación (23,71 %), vascularización (21,8 %) y ulceración (7,1 %). El 61,6 % de los casos fueron asintomáticos. Encontramos 14 tipos histológicos de tumores en los párpados y 15 en la conjuntiva. No encontramos diferencia significativa en cuanto a sexo y tipo de tumor. La raza mestiza presentó el mayor número de casos y el grupo de mayor incidencia fue el de pacientes mayores e iguales a 50 a os de edad. Los párpados constituyeron la localización anatómica principal. El signo clínico más importante fue el aumento de volumen y la mayoría de los pacientes estaban asintomáticos. Los tumores palpebrales de mayor incidencia fueron los quistes de inclusión seguido por el carcinoma basocelular y el granuloma. En la conjuntiva se destacaron los nevus, el carcinoma espinocelular y el granuloma. A retrospective study of 211 patients that were operated on for presenting some adnexa tumors with histologic confirmation from January, 1993, to December, 1997, was made. 53.5 % of the patients were females. 48.4 % were black. 13.3 % were under 20, 36 % were between 20 and 49 and 50.7 % were over 50. 61.1 % of the tumors were localized in the eyelids. The prevailing clinical signs were volume increase (56.9 %), pigmentation increase (23.71 %), vascularization (21.8 %) and ulceration (7.1 %). 61.6 % of the patients were asymptomatic. We found 14 histologic types of tumors in the eyelids and 15 in the conjunctiva. There were no significant differences as regards sex and type of tumor. Most of the cases were observed among the black, whereas the group of highest incidence was that of patients aged 50 and over. The eyelids were the chief anatomical localization. The most important clinical sign was the volume increase and most of the patients were asymptomatic. The eyelid tumors of highest incidence were the inclusion cysts, followed by the basocelular carcinoma and the granuloma. The nevus, the spinocellular carcinoma and the granuloma were remarkable in the conjunctiva.
MAGELLAN PEAT (Sphagnum magallanicum) AS NATURAL ADSORBENT OF RECALCITRAN SYNTHETIC DYES Turba magallánica (Sphagnum magallanicum) como adsorbente natural de colorantes sintéticos recalcitrantes
Luisa A Sepulveda-Cuevas,Elsa G Contreras-Villacura,Carolyn L Palma-Toloza
Revista de la Ciencia del Suelo y Nutrición Vegetal , 2008,
Abstract: Colour abatement is a complex problem because the synthetic origin of the dyes used in the industry. The purpose of this study is to evaluate the feasibility of using Magellan peat (Sphagnum magallanicum) as an adsorbent of textile dyes, determining the physical-chemical characteristics of the peat by measuring the adsorptive capacity of the dyes as well as exploring the degrading potential of the native microorganisms they contain. The results obtained indicate that the peat has a specific surface area (BET) and a volume of 144.3 m2 g-1 and 60% of meso- and macropores, respectively. The basicity of the peat surface is superior to acidity and the pH in which the neutrality is reached is about 3.1. Equilibrium concentrations for the basic, acid and reactive dyes in the solid and liquid phases were appropriately interpreted by the Langmuir model; however the maximum adsorption capacities of the first ones were significantly higher. If the solution pH is lower to pzpc, the absorption capacity of the acid dyes increases. Three different bacteria colonies with decolourization capacity were isolated. In conclusion, results indicate that the peat may be successfully applied in the detoxification of textile effluents. El abatimiento del color es un problema complejo dado el origen sintético de los colorantes utilizados en la industria. El propósito del presente estudio es evaluar la viabilidad de utilizar turba magallánica {Sphagnum magallanicum) como adsorbente de tintes textiles, determinando las características fisicoquímicas de la turba, evaluando la capacidad adsortiva de los tintes así como, explorando el potencial degradativo de los microorganismos nativos presentes en ella. Se determinó que la superficie específica (BET) y el volumen de meso y macroporos de la turba es de 144,3 m2 g-1 y 60%, respectivamente. La basicidad de la superficie es superior a la acidez y el pH en el cual se logra la neutralidad es 3,1. Las concentraciones de equilibrio de los tintes básicos, ácidos y reactivos en la fase sólida y líquida fueron apropiadamente interpretadas por el modelo de Langmuir, no obstante las capacidades máximas de adsorción de los primeros fueron superiores. Si el pH de la solución es inferior a pzpc la capacidad de adsorción de los tintes ácidos se incrementa. Se aislaron tres diferentes colonias de bacterias las cuales mostraron capacidad decolorativa. Estos resultados indican que la turba puede ser aplicada exitosamente en la detoxificación de efluentes textiles.
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