Now showing items 107-126 of 212

Hacia la construcción de un modelo de simulación de la transmisión del dengue en Colombia

Vélez, S. (Santiago); Núñez, C. P. (Claudia Patricia); Ruiz-Carrascal, C. D. (Carlos Daniel) (Civil, Ambiental Geológica e IndustrialEscuela de Ingeniería de Antioquia EIA, 2014-05-07)

Dengue fever has been considered a public health problem worldwide. In several Colombian regions, where environmental conditions seem to be favorable enough for disease transmission, incidence has been showing important ...
Herramientas geométricas para el diseño básico de columnas de destilación con mezclas azeotrópicas heterogéneas ternarias. I. Cálculo del reflujo mínimo

Sánchez-Correa, César Augusto; Rodríguez, Gerardo; Gómez-García, Miguel Ángel (Fondo Editorial EIA, 2013-11-07)

Useful numerical tools to calculate the minimum reflux for infinite towers with heterogeneous azeotropic ternary mixtures are presented. For this, two geometrical elements are involved: the pinch point branches (PPB) and ...
Herramientas para la caracterización termodinámica de sistemas ternarios en destilación

Sánchez-Correa, César Augusto; Estupiñán, L. (Libardo); Salazar, M. A. (Mario Andrés) (Fondo Editorial EIA, 2013-11-25)

Innovative numerical tools are presented in this paper, based on the theory of homotopy continuation methods, for the solution of phase equilibrium problems, pertinent in the thermodynamic characterization of ternary ...
Identificación eficiente de errores en estimación de estado usando un algoritmo genético especializado

Ruiz, Hugo A. (Hugo Andrés); Toro, Eliana Mirledy; Gallego, Ramón Alfonso (Fondo Editorial EIA, 2013-11-08)

In this paper a method to solve the state estimation problem in electric systems applying combinatorial optimization is presented. Its objective is the study of measures with difficult detection errors, which affect the ...
Impacto de estrategias de colaboración entre dos actores de una cadena logística en la programación de la producción

Montoya-Torres, J. R. (Jairo Rafael); Rodríguez-Verjan, G. (Gloria); Merchán-Alba, L. (Liliana) (Civil, Ambiental Geológica e IndustrialEscuela de Ingeniería de Antioquia EIA, 2014-05-08)

Nowadays implementing cooperation strategies between the members of the supply chain has been an important research topic in order to obtain a more reactive and flexible supply chain in the highly and competitive markets. ...
Impacto del material reciclado en los inventarios de materias primas de una empresa manufacturera

Salinas-López, G. A. (Guillermo Antonio); Victoria-Moreno, A. (Anthony); Osorio, J.C. (Juan Carlos) (Fondo Editorial EIA, 2013-10-23)

In this paper, a system dynamics model is designed. This model, together with some management indicators is used to measure the impact of recycled material in an industry. This, in order to provide best elements in decision ...
Impactos de las carreteras sobre la fauna silvestre y sus principales medidas de manejo

Arroyave-Maya, M. P. (Maria del Pilar); Gómez, C. (Carolina); Gutiérrez-Lagoueyte, M. E. (María Elena); Múnera-Franco, D. P. (Diana Paulina); Zapata-Jaramillo, P. A. (Paula Andrea); Vergara, I. C. (Isabel Cristina); Andrade, L. M. (Liliana María); Ramos, K. C. (Karen Cristina) (Civil, Ambiental Geológica e IndustrialEscuela de Ingeniería de Antioquia EIA, 2014-05-07)

The purpose of this paper is to present the impact of roads on wildlife and to evaluate the ways to manage these impacts. Various foreign articles and studies were analyzed as well as environmental impact studies of roads ...
Implementación de un sistema de medición de temperatura empleando fibra óptica para el estudio térmico de transformadores de distribución inmersos en aceite mineral y vegetal

Navas, D. F. (Diego Fernando); Cadavid-Ramírez, Héctor; Echeverry-Ibarra, Diego Fernando (Fondo Editorial EIA, 2013-10-22)

Transformers are elements of the utmost importance in the layout of power grids. Their usable lifespan depends on various factors, amongst them, the temperature within their own interior, specially the localized temperature ...
Indicadores de alerta temprana de vulnerabilidad macroeconómica

Giraldo, Jorge Alberto (Revista EIA - Fondo EditorialAdministrativa, Financiera, Sistemas y ComputaciónEnvigado (Antioquia, Colombia), Universidad EIA, 2008, 2008)

Las crisis financieras generan efectos macroeconómicos nocivos que terminan por afectar el nivel de vida de la mayoría de la población. La identificación, prevención o minimización de sus efectos es tarea de las ...
Indo-pacific and tropical atlantic EOF modes: contributions to the analyses of cloud cover conditions in the Los Nevados Natural Park

Carrascal-Ruiz, C. D. (Carlos Daniel) (Fondo Editorial EIA, 2013-11-20)

Los páramos colombianos están experimentando un aumento en su estrés climático. Uno de los factores clave detrás de esto es el cambio en las condiciones de cobertura de nubes, que dependen de procesos regionales y locales. ...
Influence of the story stiffness of reinforced concrete frame with proportional hysteretic dampers on the seismic response

Oviedo, J. A. (Juan Andrés) (Fondo Editorial EIA, 2013-11-12)

Este artículo investiga la influencia de la rigidez de piso del pórtico de concreto reforzado sobre la respuesta sísmica de edificaciones de concreto equipadas con disipadores histeréticos proporcionales. Para esto, fueron ...
Influencia de la fatiga muscular en la señal electromiográfica de músculos estimulados eléctricamente

Fernández-Arteaga, J. M. (Juliana María); Acevedo, R. (Rubén); Tabernig, C. (Carolina) (Biomédica, Mecatrónica y MecánicaEscuela de Ingeniería de Antioquia EIA, 2014-05-08)

The functional electrical stimulation is a technique of rehabilitation for patients with paralysis that restitutes the lost motor function, which can be studied by means of the registry of the electrical activity of muscles ...
Influencia de la relación masa/área en las propiedades de cerámicas de PZN-5PT-5BT

Villaquiran, C. F. (Claudia Fernanda) (Fondo Editorial EIA, 2013-10-28)

0,90Pb(Zn1/3Nb2/3)O3–0,05PbTiO3-0,05BaTiO3 (PZN-5PT-5BT) ceramic powders, with majority perovskite phase, were synthesized using the columbite method. These powders were shaped into cylindrical pellets, which had two ...
Influencia de la vegetación en los niveles de ruido urbano

Posada-Posada, M. I. (Martha Isabel); Arroyave-Maya, M. P. (Maria del Pilar); Fernández-Ossa, C. E. (Carlos Eduardo) (Fondo Editorial EIA, 2013-11-26)

The objective of the study was to assess the capacity of vegetation to reduce the noise in the Aburrá valley. The methodology comprised two phases: the first was the revision of secondary information related to the role ...
Influencia de las características del relleno mineral en la resistencia de una mezcla asfáltica

Reyes-Ortiz, O. J. (Oscar Javier); Rincón, J. F. (John Fredy) (Fondo Editorial EIA, 2013-11-27)

The main objective of the research was to determine the effect in the indirect tension strength when replacing mineral filler by cement, lime, and ash at different percentages. Materials were first characterized (aggregates, ...
Influencia de los recubrimientos dúplex sobre las propiedades mecánicas y resistencia al desgaste del acero AISI 4140 bonificado

Bolívar-Osorio, F. J. (Francisco Javier); Bejarano-Gaitán, G. (Gilberto); Gómez-Botero, M. A. (Maryory Astrid) (Fondo Editorial EIA, 2013-10-28)

The AISI 4140 steel is a low chrome/molybdenum alloyed steel with high tensile strength and good toughness, which is normally used for the manufacture of machine parts such as gears, crank shafts, camshafts, etc. However, ...
Información, conocimiento y desarrollo económico

Lochmüller, C. (Christian) (Administrativa, Financiera, Sistemas y ComputaciónEscuela de Ingeniería de Antioquia EIA, 2014-05-12)

Production of information and knowledge is booming. Access to and availability of information and knowledge are better than ever before. However, we can observe companies and countries which use existent knowledge more ...
Ingeniería de tejido óseo: consideraciones básicas

Estrada, C. (Catalina); Paz, A. C. (Ana Cristina); López-Rojas, L. E. (Luis Ernesto) (Biomédica, Mecatrónica y MecánicaEscuela de Ingeniería de Antioquia EIA, 2014-05-07)

Usually bone tissue loss caused by trauma, osteonecrosis, and tumors has been treated using autograft, allograft, xenograft, and implantation of substitute materials. Each of these treatments has significant limitations, like ...
Inmunosensor piezoeléctrico para la detección del metabolito 3,5,6-tricloro-2-piridinol del plaguicida clorpirifos

Ocampo, Aquiles; Jaramillo, Marisol; March-Iborra, Carmen; Montoya, Ángel (Fondo Editorial EIA, 2013-11-15)

Detection and monitoring of the organophosphate insecticide chlorpyrifos are required to comply with the limits allowed under different laws of regulatory agencies. Here we report on a piezoelectric immunosensor which can ...
Inmunosensores piezoeléctricos: revisión general y su aplicación en el análisis de pesticidas

Ocampo, Aquiles; March, Iborra, Carmen; Montoya, Ángel (Escuela de Ingeniería de Antioquia EIA, 2014-05-08)

A bibliographic review about the main aspects concerning the development of immunosensors is presented in this article, as well as some of the experimental results in an application in the analysis of carbaryl plaguicide ...

Envíos recientes

Hacia la construcción de un modelo de simulación de la transmisión del dengue en Colombia
...
Vélez, S. (Santiago) | 2014-05-07

Dengue fever has been considered a public health problem worldwide. In several Colombian regions, where environmental conditions seem to be favorable enough for disease transmission, incidence has been showing important high values. Simplified versions of the infectious disease mathematical models CIMSiM and DENSiM were proposed to be applied for representing the transmission dynamics of dengue incidence in a specific Colombian locality. This is our first quantitative attempt to explore the possible influence of climatic variables on dengue transmission in endemic urban areas. Climatic records were analyzed to detect possible anomalies and their degree of association with epidemiological time series.

LEER
Herramientas geométricas para el diseño básico de columnas de destilación con mezclas azeotrópicas heterogéneas ternarias. I. Cálculo del reflujo mínimo
...
Sánchez-Correa, César Augusto | 2013-11-07

Useful numerical tools to calculate the minimum reflux for infinite towers with heterogeneous azeotropic ternary mixtures are presented. For this, two geometrical elements are involved: the pinch point branches (PPB) and the structure defined by the binodal and the vapor line. The proposed conceptual design methodology integrates those two elements with the distillation borders at total reflux. The solution of the minimum reflux problem (MPR) for two mixtures of industrial interest (the dehydrations of acetic acid using n-amilacetate and ethanol using benzene) demonstrates the usefulness of the proposed methodology. For the analyzed mixtures under sharp separations the structure of the distillation lines at minimum reflux satisfies the regularities observed in homogeneous systems.

LEER
Herramientas para la caracterización termodinámica de sistemas ternarios en destilación
...
Sánchez-Correa, César Augusto | 2013-11-25

Innovative numerical tools are presented in this paper, based on the theory of homotopy continuation methods, for the solution of phase equilibrium problems, pertinent in the thermodynamic characterization of ternary mixtures. The main contribution is the strategy to transform phase equilibrium problems in thermodynamic homotopies that can be solved with the continuation methods. Some complex but typical situations are illustrated in processes of azeotropic and extractive distillation, related to the location of azeotropes, the classification of the volatility regions and the liquid-liquid-vapor envelope.

LEER
Identificación eficiente de errores en estimación de estado usando un algoritmo genético especializado
...
Ruiz, Hugo A. (Hugo Andrés) | 2013-11-08

In this paper a method to solve the state estimation problem in electric systems applying combinatorial optimization is presented. Its objective is the study of measures with difficult detection errors, which affect the performance and quality of the results when a classic state estimator is used. Due to the mathematical complexity, sensibility indicators are deduced from the theory of leverage points used in the Chu-Beasley optimization algorithm with the purpose of reducing the computational effort and enhance the quality of the results. The proposed method is validated in a 30-node IEEE system.

LEER
Impacto de estrategias de colaboración entre dos actores de una cadena logística en la programación de la producción
...
Montoya-Torres, J. R. (Jairo Rafael) | 2014-05-08

Nowadays implementing cooperation strategies between the members of the supply chain has been an important research topic in order to obtain a more reactive and flexible supply chain in the highly and competitive markets. However, few studies have been done on the impact of such cooperation strategies at one of the lower short-term decision levels: production scheduling. This paper is devoted to the study of information sharing between the members of the supply chain in a dynamic context. We consider a typical make-to-order direct sell supply chain without finished products inventory, similar to that implemented by Internet PC sellers. We compare various scheduling algorithms that are able to take into account future information from forward member of the supply chain. A simulation study is developed in order to get some insights about the impact of information sharing on the performance of the chain. Our results suggest improvement in the performance that shows the importance of collaboration and information sharing between the members of the chain.

LEER
Impacto del material reciclado en los inventarios de materias primas de una empresa manufacturera
...
Salinas-López, G. A. (Guillermo Antonio) | 2013-10-23

In this paper, a system dynamics model is designed. This model, together with some management indicators is used to measure the impact of recycled material in an industry. This, in order to provide best elements in decision making process related to the management of raw materials stocks. For this purpose, a review of the main elements that influence the production plan of a business case study is performed. Thus, a characterization of the industry and subsequent configuration of the structure and relationships of the system is obtained, in order to model and simulate using the software Vensim DSS. From these simulations, a review and analysis of the system behavior, as well as variations proposed, in different scenarios and changes in relevant parameters, is executed. At the end, a model that illustrates the behavior of inventory levels of different types of materials as well as the values of some logistics and energy indicators is obtained, revealing the important work ahead in recycling on the region of Valle del Cauca, Colombia.

LEER
Impactos de las carreteras sobre la fauna silvestre y sus principales medidas de manejo
...
Arroyave-Maya, M. P. (Maria del Pilar) | 2014-05-07

The purpose of this paper is to present the impact of roads on wildlife and to evaluate the ways to manage these impacts. Various foreign articles and studies were analyzed as well as environmental impact studies of roads developed in Antioquia. As a result of this study it was found that the main impacts were roadkills, population isolation, and changes in reproductive patterns. The above impacts have the overall consequence of diminishing the populations of fauna. The management strategies to overcome these impacts are discussed as well.

LEER
Implementación de un sistema de medición de temperatura empleando fibra óptica para el estudio térmico de transformadores de distribución inmersos en aceite mineral y vegetal
...
Navas, D. F. (Diego Fernando) | 2013-10-22

Transformers are elements of the utmost importance in the layout of power grids. Their usable lifespan depends on various factors, amongst them, the temperature within their own interior, specially the localized temperature on their insulating material components. Such temperatures are usually approximated through proposed guideline models, however, as stated, these values are approximations and realtime direct measurements would be much more desirable. Due to purely economic reasons, direct measurement is often used for power transformers. However, in the advent of “Smart Grids” distribution system instrumentation will be necessary, as well as the use of cleaner technologies. For research purposes, in this paper, the authors will discuss their experiences in instrumentation with optical fibers in four different distribution transformers submerged in mineral and vegetable oil, for thermal evaluation. The transformers have capacities that range from 15 kVA to 37,5 kVA and operate at voltages of 7620 V / 240 V. This paper also explains the process of identifying which are the optimal temperature measurement points in the interior of the transformer and leads into the results of temperature rise tests with simulated loads through the use of short circuits and through constant reference fault and actual load at two levels to compare measurements within each of the transformers.

LEER
Indicadores de alerta temprana de vulnerabilidad macroeconómica
...
Giraldo, Jorge Alberto | 2008

Las crisis financieras generan efectos macroeconómicos nocivos que terminan por afectar el nivel de vida de la mayoría de la población. La identificación, prevención o minimización de sus efectos es tarea de las autoridades económicas, que utilizan distintas herramientas de diagnóstico. En este artículo se explica la metodología de Goldstein, Kaminsky y Reinhart para construir un sistema de indicadores de alerta temprana de crisis financieras, que introduce conceptos innovadores para la realización del análisis y, además, está diseñada para ser aplicada en los países considerados mercados emergentes.

LEER
Indo-pacific and tropical atlantic EOF modes: contributions to the analyses of cloud cover conditions in the Los Nevados Natural Park
...
Carrascal-Ruiz, C. D. (Carlos Daniel) | 2013-11-20

Los páramos colombianos están experimentando un aumento en su estrés climático. Uno de los factores clave detrás de esto es el cambio en las condiciones de cobertura de nubes, que dependen de procesos regionales y locales. Este trabajo busca explorar el grado de asociación entre la variabilidad año a año de las temperaturas superficiales del mar (TSM) observadas en las zonas tropicales de los océanos Índico-Pacífico y Atlántico y los cambios de año a año en las condiciones de cobertura regional de nubes imperantes en la cordillera Central de Colombia, pero enfocándose en el píxel de la retícula satelital donde se encuentran el macizo volcánico Ruiz-Tolima, el Parque Nacional Natural Los Nevados y sus alrededores. Los registros analizados incluyen valores promedio mensuales de TSM observados en la región Niño 3.4 del Pacífico ecuatorial, anomalías de las TSM observadas en las cuencas tropicales del Índico-Pacífico y el Atlántico, así como la cobertura de nubes de todo tipo y la presión atmosférica en su capa alta observadas sobre los Andes septentrionales.

LEER
Influence of the story stiffness of reinforced concrete frame with proportional hysteretic dampers on the seismic response
...
Oviedo, J. A. (Juan Andrés) | 2013-11-12

Este artículo investiga la influencia de la rigidez de piso del pórtico de concreto reforzado sobre la respuesta sísmica de edificaciones de concreto equipadas con disipadores histeréticos proporcionales. Para esto, fueron llevados a cabo análisis cronológicos no lineales sobre una serie de modelos de sistemas de múltiples grados de libertad. Los modelos incluyen un amplio rango de parámetros estructurales y diferentes distribuciones en altura de rigideces y resistencias de piso del pórtico principal de concreto y de los disipadores. Aunque el objetivo básico de instalar disipadores sea reducir la demanda de deformación en la estructura, los resultados de los análisis indican que la demanda de deriva de piso del sistema completo puede ser incluso más grande que la de la edificación sin disipadores, dependiendo en gran medida de la rigidez y del período de respuesta del pórtico principal de concreto. Por otra parte, se muestra que los disipadores son más eficientes para reducir la demanda de deriva de piso cuando se instalan en pórticos flexibles de concreto.

LEER
Influencia de la fatiga muscular en la señal electromiográfica de músculos estimulados eléctricamente
...
Fernández-Arteaga, J. M. (Juliana María) | 2014-05-08

The functional electrical stimulation is a technique of rehabilitation for patients with paralysis that restitutes the lost motor function, which can be studied by means of the registry of the electrical activity of muscles or electromyographic signal. When the muscle is being stimulated, this signal is a wave of synchronous depolarization with the stimulus, which receives the name of M-wave. This wave is the main indicator of the answer of the muscle to the electrical stimulus and presents changes in its spectral and morphological characteristics when the fatigue phenomenon appears. The muscular fatigue limits the use of systems of functional stimulation during prolonged periods. The variables more used to evaluate the changes in M-wave are their amplitude and duration, and the mean and the median of their frequency spectrum. During the fatigue phenomenon, the amplitude of the M-wave diminishes and its duration increases. As a result of the lactic acid accumulation, the speed of conduction of muscular fibers is reduced, resulting in a spectral compression and a shift of the frequency spectrum towards the low frequencies. The reported works that study the changes in M-wave during the occurrence of the phenomenon of fatigue are limited to static conditions. It is then necessary the development of new techniques to detect the occurrence of the phenomenon of fatigue in dynamic conditions similar to those existing in the daily life.

LEER
Influencia de la relación masa/área en las propiedades de cerámicas de PZN-5PT-5BT
...
Villaquiran, C. F. (Claudia Fernanda) | 2013-10-28

0,90Pb(Zn1/3Nb2/3)O3–0,05PbTiO3-0,05BaTiO3 (PZN-5PT-5BT) ceramic powders, with majority perovskite phase, were synthesized using the columbite method. These powders were shaped into cylindrical pellets, which had two different mass/area ratios. The pellets were sintered within 1040 and 1150°C during one hour and under a rich lead oxide atmosphere. The percentage of perovskite phase, for both powders and ceramics (surface and interior), was obtained by X-rays diffraction spectrum, where it was observed that ceramic samples present higher percentage of perovskite phase and the highest density value when sintered at 1100 ºC during one hour. Morphology was analyzed using scanning electron microscopy. It revealed that the mass/area ratio influences the stabilization of the perovskite phase within the sintering process, the bigger the content of mass for area unit the more stable the perovskita phase

LEER
Influencia de la vegetación en los niveles de ruido urbano
...
Posada-Posada, M. I. (Martha Isabel) | 2013-11-26

The objective of the study was to assess the capacity of vegetation to reduce the noise in the Aburrá valley. The methodology comprised two phases: the first was the revision of secondary information related to the role of vegetation and to obtain the conceptual bases for further experimental development. The second phase was the measurement of noise levels 10 m from the sound source (high traffic road) in urban public green zones with different plant coverage (tree, shrub, and a mixture of trees and shrubs) and without vegetation. Results showed no significant differences between the sites with and without vegetation, allowing us to infer that under conditions of the study, characterized by having few individuals of trees and shrubs dispersed, the vegetation does not play a significant role in reducing noise. Therefore, for its control in urban areas measures other than the planting of trees must be taken, or wider, longer, denser, and higher live barriers should be established.

LEER
Influencia de las características del relleno mineral en la resistencia de una mezcla asfáltica
...
Reyes-Ortiz, O. J. (Oscar Javier) | 2013-11-27

The main objective of the research was to determine the effect in the indirect tension strength when replacing mineral filler by cement, lime, and ash at different percentages. Materials were first characterized (aggregates, asphalt, lime, cement and fly ash). Then, using the Marshall method, was determined the optimum percentage of asphalt. Gradation m10 and asphalt with penetration 60/70 was chosen for the study, similarly, mineral filler was replaced on the percentages of 0, 25, 50, 75, 100. Strength was increased 58 % by substituting 100 % of mineral filler for lime, from 22 % to replace 50 % filler by fly ash, and 5 % by 75 % replacing cement, were the main findings of this study. In addition, it was found in relation to the deformation test, for all percentages of replacement of lime and cement, the mixture supports higher deformation to the maximum load. Whereas that, for replacement of fly ash, only 100 % replacement of the deformation increased with the maximum load.

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Influencia de los recubrimientos dúplex sobre las propiedades mecánicas y resistencia al desgaste del acero AISI 4140 bonificado
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Bolívar-Osorio, F. J. (Francisco Javier) | 2013-10-28

The AISI 4140 steel is a low chrome/molybdenum alloyed steel with high tensile strength and good toughness, which is normally used for the manufacture of machine parts such as gears, crank shafts, camshafts, etc. However, its wear resistance is quite limited and this is usually improved by nitriding surface treatment. The purpose of this study was to increase the mechanical properties and wear resistance of 4140 steel by applying a DUPLEX surface treatment consisting of a liquid nitriding (known as Teniffer) followed by the deposition of a titanium nitride (TiN) hard coating. The crystalline microstructure was evaluated by Xray diffraction (XRD), morphology and elemental chemical composition was determined by microscopy SEM and energy dispersive X-ray spectroscopy (EDS), tribological properties were tested using a tribometer type ballondisc and micro hardness was determined by the Vickers method.

LEER
Información, conocimiento y desarrollo económico
...
Lochmüller, C. (Christian) | 2014-05-12

Production of information and knowledge is booming. Access to and availability of information and knowledge are better than ever before. However, we can observe companies and countries which use existent knowledge more effectively than others. This paper describes the role of information and knowledge in economic theory, discusses the difficulties of transferring knowledge and analyses the fact that in many cases created knowledge does not get introduced to markets. Innovation and entrepreneurship are the missing link that should be strengthened in order to transform knowledge into new products, processes, services, and markets. That is why changes are necessary within companies as well as in the education system in order to apply and commercialize more of the generated knowledge.

LEER
Ingeniería de tejido óseo: consideraciones básicas
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Estrada, C. (Catalina) | 2014-05-07

Usually bone tissue loss caused by trauma, osteonecrosis, and tumors has been treated using autograft, allograft, xenograft, and implantation of substitute materials. Each of these treatments has significant limitations, like availability of sufficient donor tissue, disease transmission, donor site morbidity, and inability of materials to remodel and react against physiological conditions. For all these reasons there is a need for alternative bone replacement procedures. Tissue Engineering aims to satisfy this need by the development of bone substitutes using different cell types, three-dimensional matrixes (scaffolds), in a medium supplemented with growth factors. The present review is focused in Bone Tissue Engineering and its most important aspects.

LEER
Inmunosensor piezoeléctrico para la detección del metabolito 3,5,6-tricloro-2-piridinol del plaguicida clorpirifos
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Ocampo, Aquiles | 2013-11-15

Detection and monitoring of the organophosphate insecticide chlorpyrifos are required to comply with the limits allowed under different laws of regulatory agencies. Here we report on a piezoelectric immunosensor which can determine and quantify 3,5,6-trichloro-2-pyridinol (TCP), the main metabolite of chlorpyrifos and the herbicide triclopyr. The analysis and quantification of TCP is based on a competitive immunoassay with monoclonal antibody. Therefore, BSA-TS1hapten-conjugate for TCP was attached by a covalent bond to the gold electrode of a quartz crystal by means of both, simple and mixed self-assembled monolayers (SAM and MSAM). Standard calibration curves were obtained with both types, SAM and MSAM, and results were compared. For simple SAM the limit of detection (LOD) and working range obtained were 16 and 25-100 μg/L, respectively, whereas for MSAM were 9.5 and 18-74 μg/L, respectively. In both cases, the crystal may be used for about 100 tests without appreciable loss of sensitivity.

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Inmunosensores piezoeléctricos: revisión general y su aplicación en el análisis de pesticidas
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Ocampo, Aquiles | 2014-05-08

A bibliographic review about the main aspects concerning the development of immunosensors is presented in this article, as well as some of the experimental results in an application in the analysis of carbaryl plaguicide that illustrates the analytical methodology and the expected results. The quartz crystal microbalance immunosensor (QCM), known as piezoelectric immunosensor, is an analytical system which combines an immunoreagent as the biologic component, a quartz crystal transducer with an immobilized antigen or antibody on its surface, coupled to an information processing system. Due to its simplicity, convenience, low cost, accuracy, stability, and real time response, this device has become very important, especially for material analysis in biomedicine, food, environment, and veterinary.

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Browsing Revista EIA by Title

Hacia la construcción de un modelo de simulación de la transmisión del dengue en Colombia ﻿

Herramientas geométricas para el diseño básico de columnas de destilación con mezclas azeotrópicas heterogéneas ternarias. I. Cálculo del reflujo mínimo ﻿

Herramientas para la caracterización termodinámica de sistemas ternarios en destilación ﻿

Identificación eficiente de errores en estimación de estado usando un algoritmo genético especializado ﻿

Impacto de estrategias de colaboración entre dos actores de una cadena logística en la programación de la producción ﻿

Impacto del material reciclado en los inventarios de materias primas de una empresa manufacturera ﻿

Impactos de las carreteras sobre la fauna silvestre y sus principales medidas de manejo ﻿

Implementación de un sistema de medición de temperatura empleando fibra óptica para el estudio térmico de transformadores de distribución inmersos en aceite mineral y vegetal ﻿

Indicadores de alerta temprana de vulnerabilidad macroeconómica ﻿

Indo-pacific and tropical atlantic EOF modes: contributions to the analyses of cloud cover conditions in the Los Nevados Natural Park ﻿

Influence of the story stiffness of reinforced concrete frame with proportional hysteretic dampers on the seismic response ﻿

Influencia de la fatiga muscular en la señal electromiográfica de músculos estimulados eléctricamente ﻿

Influencia de la relación masa/área en las propiedades de cerámicas de PZN-5PT-5BT ﻿

Influencia de la vegetación en los niveles de ruido urbano ﻿

Influencia de las características del relleno mineral en la resistencia de una mezcla asfáltica ﻿

Influencia de los recubrimientos dúplex sobre las propiedades mecánicas y resistencia al desgaste del acero AISI 4140 bonificado ﻿

Información, conocimiento y desarrollo económico ﻿

Ingeniería de tejido óseo: consideraciones básicas ﻿

Inmunosensor piezoeléctrico para la detección del metabolito 3,5,6-tricloro-2-piridinol del plaguicida clorpirifos ﻿

Inmunosensores piezoeléctricos: revisión general y su aplicación en el análisis de pesticidas ﻿

Envíos recientes

Hacia la construcción de un modelo de simulación de la transmisión del dengue en Colombia

Herramientas geométricas para el diseño básico de columnas de destilación con mezclas azeotrópicas heterogéneas ternarias. I. Cálculo del reflujo mínimo

Herramientas para la caracterización termodinámica de sistemas ternarios en destilación

Identificación eficiente de errores en estimación de estado usando un algoritmo genético especializado

Impacto de estrategias de colaboración entre dos actores de una cadena logística en la programación de la producción

Impacto del material reciclado en los inventarios de materias primas de una empresa manufacturera

Impactos de las carreteras sobre la fauna silvestre y sus principales medidas de manejo

Implementación de un sistema de medición de temperatura empleando fibra óptica para el estudio térmico de transformadores de distribución inmersos en aceite mineral y vegetal

Indicadores de alerta temprana de vulnerabilidad macroeconómica

Indo-pacific and tropical atlantic EOF modes: contributions to the analyses of cloud cover conditions in the Los Nevados Natural Park

Influence of the story stiffness of reinforced concrete frame with proportional hysteretic dampers on the seismic response

Influencia de la fatiga muscular en la señal electromiográfica de músculos estimulados eléctricamente

Influencia de la relación masa/área en las propiedades de cerámicas de PZN-5PT-5BT

Influencia de la vegetación en los niveles de ruido urbano

Influencia de las características del relleno mineral en la resistencia de una mezcla asfáltica

Influencia de los recubrimientos dúplex sobre las propiedades mecánicas y resistencia al desgaste del acero AISI 4140 bonificado

Información, conocimiento y desarrollo económico

Ingeniería de tejido óseo: consideraciones básicas

Inmunosensor piezoeléctrico para la detección del metabolito 3,5,6-tricloro-2-piridinol del plaguicida clorpirifos

Inmunosensores piezoeléctricos: revisión general y su aplicación en el análisis de pesticidas

Biblioteca Universidad Escuela Ingenieros de Antioquia

Hacia la construcción de un modelo de simulación de la transmisión del dengue en Colombia

Herramientas geométricas para el diseño básico de columnas de destilación con mezclas azeotrópicas heterogéneas ternarias. I. Cálculo del reflujo mínimo

Herramientas para la caracterización termodinámica de sistemas ternarios en destilación

Identificación eficiente de errores en estimación de estado usando un algoritmo genético especializado

Impacto de estrategias de colaboración entre dos actores de una cadena logística en la programación de la producción

Impacto del material reciclado en los inventarios de materias primas de una empresa manufacturera

Impactos de las carreteras sobre la fauna silvestre y sus principales medidas de manejo

Implementación de un sistema de medición de temperatura empleando fibra óptica para el estudio térmico de transformadores de distribución inmersos en aceite mineral y vegetal

Indicadores de alerta temprana de vulnerabilidad macroeconómica

Indo-pacific and tropical atlantic EOF modes: contributions to the analyses of cloud cover conditions in the Los Nevados Natural Park

Influence of the story stiffness of reinforced concrete frame with proportional hysteretic dampers on the seismic response

Influencia de la fatiga muscular en la señal electromiográfica de músculos estimulados eléctricamente

Influencia de la relación masa/área en las propiedades de cerámicas de PZN-5PT-5BT

Influencia de la vegetación en los niveles de ruido urbano

Influencia de las características del relleno mineral en la resistencia de una mezcla asfáltica

Influencia de los recubrimientos dúplex sobre las propiedades mecánicas y resistencia al desgaste del acero AISI 4140 bonificado

Información, conocimiento y desarrollo económico

Ingeniería de tejido óseo: consideraciones básicas

Inmunosensor piezoeléctrico para la detección del metabolito 3,5,6-tricloro-2-piridinol del plaguicida clorpirifos

Inmunosensores piezoeléctricos: revisión general y su aplicación en el análisis de pesticidas