Consideraba Montesquieu, que de la relación entre las costumbres y las leyes manifestada en los ritos surgía el espíritu de una Nación. Los legisladores chinos, por ejemplo, consideraron que el medio más indicado para conseguir la tranquilidad del imperio era inculcando la sumisión a través de ritos y ceremonias que honraban a los padres; respeto que suponía benignidad de estos hacia los hijos. Este jurista ilustrado, además de las idiosincrasias, también concebía que el clima, la geografía y los ...
Tópico(s): Indigenous Cultures and Socio-Education
2017 - | Revista de Antropología y Sociología Virajes
Nora Helena Londoño, Diana Agudelo, Efrén Martínez, Deissy Anguila, Daniel Camilo Aguirre‐Acevedo, Jhon Fredy Arias,
Introducción. El cuestionario de comprobación de 90 síntomas (SCL–90–R) se utiliza, con frecuencia, en la exploración de la salud mental. Sin embargo, no existen estudios sobre su validez ni sobre la sensibilidad al cambio en la población clínica colombiana. El objetivo es establecer las propiedades estructurales y psicométricas del SCL–90–R para muestras clínicas colombianas e identificar diferencias con relación al género y a la sensibilidad de cambio. Metodología. Diseño longitudinal con tres ...
Tópico(s): Anxiety, Depression, Psychometrics, Treatment, Cognitive Processes
2019 - | Medunab
Hugo R. Arias, Jhon J. López, Dominik Feuerbach, Angélica Fierro, Marcelo O. Ortells, Edwin G. Pérez,
This work presents the design and synthesis of a series of novel 2-benzylquinuclidine derivatives, comprising 12 methiodide and 11 hydrochloride salts, and their structural and pharmacological characterization at the human (h) α7 and α4β2 nicotinic receptors (nAChRs). The antagonistic potency of these compounds was tested by Ca2+ influx assays on cells expressing the hα7 or hα4β2 nAChR subtype. To determine the inhibitory mechanisms, additional radioligand binding experiments were performed. The results ...
Tópico(s): Pharmacological Receptor Mechanisms and Effects
2013 - Elsevier BV | The International Journal of Biochemistry & Cell Biology
Dolly Herrera Arias, Jhon Rivera Alarcon,
El objetivo, es identificar a partir de una encuesta, qué factores se están presentando en los estudiantes de la media rural, al hacer el paso de la terminación del bachillerato a los estudios universitarios. Los datos se recolectaron y analizaron por métodos cuantitativos y la muestra estuvo conformada por 288 estudiantes. Se aplicó una encuesta a estudiantes de 5 instituciones oficiales y 2 privadas del municipio de Lebrija-Santander. Los resultados muestran que la educación vigente que reciben ...
Tópico(s): Higher Education and Sustainability
2020 - Catholic University of the Most Holy Conception | Revista de Estudios y Experiencias en Educación
M. J. Hernández‐Coronado, Manuel Hernández, Jhon James Mora, M. E. Arias,
Low molecular weight aromatic compounds released during the growth of several Streptomyces strains on wheat straw in solid-state fermentation (SSF) were identified by gas chromatography/mass spectrometry. The analysis of the compounds derived from p-hydroxyphenyl, guaiacyl and syringyl units (H, G and S respectively) of lignin indicate the ability of streptomycetes to depolymerize lignin from lignocellulose substrates. Differences in the relative area of the compounds obtained from fermented substrate ...
Tópico(s): Biochemical and biochemical processes
1998 - Wiley | Rapid Communications in Mass Spectrometry
Julián Valencia E, John-Mario Rodríguez P, Jhon Jairo Arias Mendoza, Juan-Mauricio Castaño R,
El artículo presenta la valoración de los servicios ecosistémicos de investigación y educación en la microcuenca de la quebrada Dalí, ubicada dentro de la hacienda Lisbrán; a través de tres objetivos específicos: primero, identificación de información biofísica y socioeconómica del área de estudio (línea base); segundo valoración integral del servicio de “investigación y educación” ofrecido por la microcuenca; por último analizar cómo los servicios ecosistémicos y la educación ambiental pueden convertirse ...
Tópico(s): Water Resource Management and Quality
2017 - | Luna Azul
El objetivo de esta investigación fue determinar la eficacia del modelo Flipped Classroom aplicado en las clases virtuales de matemática respecto a la participación de los estudiantes en sus procesos de aprendizaje. La metodología estuvo enmarcada bajo un enfoque cualitativo con un diseño de investigación-acción con una muestra conformada por 133 estudiantes repartidos entre dos cursos de álgebra lineal y dos de cálculo diferencial correspondientes a un primer nivel de ingeniería. Para la recolección ...
Tópico(s): E-Learning and Knowledge Management
2021 - | Revista EDUCARE - UPEL-IPB - Segunda Nueva Etapa 2 0
M.I. Pérez-Leblic, A. Turmero, Manuel Hernández, A. J. Hernández, Jesús T. Pastor, Andrew S. Ball, Jhon James Mora Rodríguez, M. E. Arias,
Landfills are often the final recipient of a range of environmentally important contaminants such as hydrocarbons, polycyclic aromatic hydrocarbons (PAHs) and polychlorinated biphenyls (PCBs). In this study the influence of these contaminants on microbial activity and diversity was assessed in a municipal solid waste (MSW) landfill placed in Torrejón de Ardoz (Madrid, Spain). Soil samples were collected from four selected areas (T2, T2B, T8 and T9) in which the amount of total hydrocarbons, PAHs and ...
Tópico(s): Landfill Environmental Impact Studies
2010 - Elsevier BV | Journal of Environmental Management
Juan Pablo Arrubla Vélez, Janneth Astrid Cubillos Vargas, Carlos A. Ramírez-Vargas, Jhon Alexander Arredondo Gonzalez, Carlos A. Arias, Diego Paredes,
<p>In several countries around the world, Pharmaceutical and Personal Care Products (PPCPs) exist in aquatic environments, a fact that increases the awareness within the scientific community with respect to their possible fate and environment effects. This research presents a preliminary monitoring of use, consumption and presence of PPCPs in wastewater from a treatment plant in a rural area of Pereira (Colombia). Domestic sewage is treated in a septic tank followed by an Up-Flow Anaerobic Filter ...
Tópico(s): Pharmaceutical and Antibiotic Environmental Impacts
2016 - National University of Colombia | Ingeniería e Investigación
Sandra‐L. Aranzazu, Alexis Tigreros, Andres Arias-Gómez, Jhon Zapata‐Rivera, Jaime Portilla,
An operably simple microwave-assisted BF3-mediated acetylation reaction of pyrazolo[1,5-a]pyrimidines and a plausible mechanism based on density functional theory (DFT) theoretical calculations for this transformation are reported. Remarkably, and to the best of our knowledge, this is the first example of the direct acetylation for the functional pyrazolo[1,5-a]pyrimidine (PP) core. The synthesis of this essential building block is reported in high yields using mild reaction conditions, inexpensive ...
Tópico(s): Synthesis of heterocyclic compounds
2022 - American Chemical Society | The Journal of Organic Chemistry
Juan Carlos Arias, FranciscoJavier Jiménez-González, Jenny Marcela Vélez-Gómez, Jhon Jairo Melchor-Moncada, Luz Angela Veloza,
... Francisco Javier Jimenez-Gonzalez, Jenny Marcela Vélez-Gómez, Jhon Jairo Melchor-Moncada, Luz Angela Veloza, and Juan Carlos Sepúlveda-Arias Author(s) affiliations:Francisco Javier Jimenez-Gonzalez1, Jenny Marcela Vélez-Gómez1, Jhon Jairo Melchor-Moncada2, Luz Angela Veloza1, Juan Carlos ...
Tópico(s): Morinda citrifolia extract uses
2018 - SAGE Publishing | Pharmacognosy Magazine
Daniel Alfredo Martínez, Jhon Felipe Arias-Valencia, Ányerson Stiths Gómez Tabares,
Obesity has been linked to low cognitive performance throughout the human life span. Alterations relate to attention, memory, language, and executive function. However, the obesity-executive function association remains unclear in adolescents. This study presents a systematic review of executive function alterations in adolescents with obesity. A search equation was proposed (Executive dysfunction AND Obesity AND Adolescents), with sixty studies meeting the inclusion criteria in the Clarivate Analytics ...
Tópico(s): Hormonal Regulation and Hypertension
2022 - Pontifical Catholic University of Chile | Psykhe (Santiago)
José Antonío González‐Pérez, Francisco Javier González-Vila, M. E. Arias, Jhon James Mora Rodríguez, José M. de la Rosa Arranz, Teodoro Marañón, L. Clemente,
The bio-geographical significance of Rhododendron ponticum spp. baeticum (Ericaceae) as a relict species is well recognized. However, out of its native habitat it is an invasive exotic considered a major threat to natural ecosystems in areas of Atlantic Western Europe. The studies on the impact of Rhododendron influence on soil organic matter composition and associated ecological implications, i.e. presence of bioactive compounds with ecological significance, are limited. This work describes the ...
Tópico(s): Petroleum Processing and Analysis
2010 - Springer Science+Business Media | Environmental Chemistry Letters
Julián Durán Tobón Arias, Jhon James Mora,
Este artículo presenta evidencia empírica sobre la relación entre las vacantes y el desempleo, a través de la Curva de Beveridge, para la ciudad de Popayán entre 2001 y 2005, siguiendo un modelo de datos de panel por áreas de desempeño. Los resultados del modelo muestran que la elasticidad del desempleo con respecto a las vacantes es estadísticamente significativa y positiva. Este resultado puede deberse a la existencia de shocks asimétricos en los distintos sectores de la economía payanés, que ...
Tópico(s): Employment, Labor, and Gender Studies
2009 - Universidad de Antioquia | Lecturas de Economía
Claudia Arias, Jhon Mario Quiroga Beltrán, Javier Mauricio Martínez Ariza, Javier Bernardo Cadena Lozano, Miguel Ángel Bello Bernal,
Circular economies have focused on managing organizations and changes in production and consumption models that lead to the better use of resources, generating the least waste. These changes toward new circular models will only be possible if consumers become involved through their behavior. In this sense, the first step is to understand who pro-circular consumers are and what characterizes them. Thus, this exploratory study aims to profile pro-circular consumers based on their behaviors and to ...
Tópico(s): Environmental Education and Sustainability
2022 - Multidisciplinary Digital Publishing Institute | Sustainability
Deniz Bağdaş, Katarzyna M. Targowska‐Duda, Jhon J. López, Edwin G. Pérez, Hugo R. Arias, M. Imad Damaj,
In Brief BACKGROUND: Positive allosteric modulators (PAMs) facilitate endogenous neurotransmission and/or enhance the efficacy of agonists without directly acting on the orthosteric binding sites. In this regard, selective α7 nicotinic acetylcholine receptor type II PAMs display antinociceptive activity in rodent chronic inflammatory and neuropathic pain models. This study investigates whether 3-furan-2-yl-N-p-tolyl-acrylamide (PAM-2), a new putative α7-selective type II PAM, attenuates experimental ...
Tópico(s): Receptor Mechanisms and Signaling
2015 - Lippincott Williams & Wilkins | Anesthesia & Analgesia
M. E. Arias, O. Polvillo, Jhon James Mora Rodríguez, Manuel Hernández, José Antonío González‐Pérez, Francisco Javier González-Vila,
The analysis of thermal transformations of the main components of sound pine wood was performed through the application of Py/GC/MS. A gradient of sub-pyrolysis temperatures (200, 250, 300 and 350 °C) and a double-shot pyrolysis at 450 and 500 °C after a pre-pyrolysis step at 250 °C were performed. Then, a flash pyrolysis at 500 °C was also applied. The pyrograms obtained after applying a gradient of sub-pyrolysis temperatures showed the no detection of carbohydrate and lignin-derived compounds at 200 ° ...
Tópico(s): Biochemical and biochemical processes
2006 - Elsevier BV | Journal of Analytical and Applied Pyrolysis
Beatriz García, Andrew S. Ball, Jhon James Mora, M.I. Pérez-Leblic, M. E. Arias, José Luis Copa-Patiño,
Tópico(s): Enzyme Catalysis and Immobilization
1998 - Springer Science+Business Media | Applied Microbiology and Biotechnology
Jenny Marcela Vélez-Gómez, Jhon Jairo Melchor-Moncada, Luz Angela Veloza, Juan Carlos Arias,
Serratiopeptidase, a metalloprotease produced by Serratia marcescens, is produced through a fermentation process using carbohydrates and proteins as carbon and nitrogen sources. However, some byproducts of the silk industry could be an alternative source for serratiopeptidase production. Therefore, the present work is focused on the purification and characterization of a serratiopeptidase produced from the C8 isolate of Serratia marcescens and obtained from a Colombian silkworm hybrid using casein ...
Tópico(s): Biochemical and Structural Characterization
2019 - Elsevier BV | International Journal of Biological Macromolecules
Beatriz García, Andrew S. Ball, Jhon James Mora, MarÃa Isabel Pérez-Leblic, M. E. Arias, JoséLuis Copa-Patiño,
Ferulic acid esterase activity (FAE) was detected, along with xylanase activity, in culture supernatants from Streptomyces avermitilis UAH30 grown in the presence of the lignocellulosic substrates, oat spelt xylan, wheat bran without starch and sugar cane bagasse. The maximum activity was detected with wheat bran (1.75 mU ml−1). No correlation between FAE activity and the amount of esterified ferulic acid present in the substrate was observed. The addition of either glucose, mannitol or glycerol to ...
Tópico(s): Plant-Microbe Interactions and Immunity
1998 - Oxford University Press | FEMS Microbiology Letters
Liliana Arias, Janeth Ceballos-Osorio, Jhon Jair Ochoa, Carlos Ortíz,
Limited information is available regarding sexuality among Colombian adults aged 50 years and older.To assess demographic or health characteristics associated with sexuality measures among middle- and older-aged men and women.Cross-sectional face-to-face interviews were conducted with retired persons from a university ambulatory medical care setting. Data on sexuality were obtained along with data on their demographic, emotional intimacy, practice of religion, medical conditions, and functional ...
Tópico(s): LGBTQ Health, Identity, and Policy
2009 - Elsevier BV | The Journal of Sexual Medicine
Fabio Vargas, Edward Restrepo, Jhon Edison Rodríguez, Freddy Vargas, Lizeth Arbeláez, Pablo Caballero, Jhoman Arias, Esperanza López, Guillermo Latorre, Gloria Duarte,
This paper shows the results of the solid-state synthesis of mullite from spent catalysts discarded from fluid catalytic cracking (FCC); the catalysts are mainly composed of silica and alumina but are polluted with SOX, forming a non-crystalline network. The synthesized mullite was used as a feedstock to thermally spray a coating onto a silica-alumina refractory brick, and its chemical resistance at high temperature was subsequently evaluated by contact with K2CO3 at 950 °C. Initially, the spent catalyst ...
Tópico(s): Advanced materials and composites
2017 - Elsevier BV | Ceramics International
Tito Morales Pinzón, Jhon Jairo Arias Mendoza,
Se realizó un estudio sobre la contaminación ambiental por ruido y emisiones de material particulado PM 10 asociado a fuentes móviles en la conurbación Pereira-Dosquebradas. Objetivo: Analizar la relación salud con el ruido ambiental y el PM 10 asociado al flujo vehicular.Metodología: Se realizaron mediciones de flujo vehicular y ruido ambiental en tres sitios de interés por congestión vehicular.Adicionalmente, se reunió información de estaciones de calidad del aire disponibles en la zona de estudio ...
Tópico(s): Vehicle emissions and performance
2013 - | Luna Azul
Angela M. Arango Arango, Miguel Ángel Dossman, Juliana Muñoz, Liliana Bueno, Jhon Jairo Arias Mendoza, Juan C. Camargo García, Juan Martín Maya,
Contextualización: Los sistemas cafeteros presentes en el Departamento de Risaralda, Colombia se caracterizan por modelos de producción acordes con las condiciones climáticas de la zona, la topografía y las necesidades de los productores de café. Los servicios ecosistémicos son percibidos por las comunidades como los beneficios que se reciben de la naturaleza, tradicionalmente estos beneficios se asocian con el aumento de la productividad, disfrute de la belleza escénica y recreación, entre otros. ...
Tópico(s): Plant and soil sciences
2020 - Universidad Nacional Abierta y a Distancia | Revista de Investigación Agraria y Ambiental
Mercedes Montiel, Jhon James Mora Rodríguez, M.I. Pérez-Leblic, Manuel Hernández, M. E. Arias, José Luis Copa-Patiño,
Tópico(s): Enzyme-mediated dye degradation
1999 - Springer Science+Business Media | Applied Microbiology and Biotechnology
Allan Orozco, María Isabel Falcón Pérez, O Jorge Ladrón de Guevara, Jhon James Mora, Manuel Hernández, Francisco Javier González-Vila, O. Polvillo, M. E. Arias,
Tópico(s): Biochemical and biochemical processes
2008 - Elsevier BV | Journal of Analytical and Applied Pyrolysis
M. E. Arias, Alba Blánquez, Manuel Hernández, Jhon James Mora, Andrew S. Ball, N. T. Jiménez Morillo, Francisco Javier González-Vila, José Antonío González‐Pérez,
Streptomycetes are actually considered one of the main groups of ligninolytic microoganisms producing a lignin-carbohydate complex named APPL (acid precipitable polymeric lignin) when growing on lignocellulosic materials. Although in these conditions the production of hemicellulolytic and oxidative extracellular enzymes were reported the specific role of laccases in lignin degradation is poorly understood. SilA, a thermostable salt-resistant and pH-versatile laccase produced by Streptomyces ipomoeae ...
Tópico(s): Fungal Biology and Applications
2016 - Elsevier BV | Journal of Analytical and Applied Pyrolysis
Iván David Lozada-Martínez, Oscar Javier Díaz‐Castillo, Michael Gregorio Ortega-Sierra, Jhon Jairo González-Monterroza, Teddy Javier Padilla-Durán, Harold Sebastián Castillo-Pastuzan, Jhoan Sebastián Robledo-Arias, María Paz Bolaño-Romero, Alfonso Pacheco-Hernández, Luis Rafael Moscote‐Salazar,
Tópico(s): Diabetic Foot Ulcer Assessment and Management
2002 - Elsevier BV | Journal of Equine Veterinary Science
Manuel Hernández, M. J. Hernández‐Coronado, Mercedes Montiel, Jhon James Mora, María Isabel Falcón Pérez, Paola Bocchini, Guido C. Galletti, M. E. Arias,
Pyrolysis/gas chromatography/mass spectrometry (Py/GC/MS) was used to elucidate whether the chemical modifications produced by streptomycetes on wheat straw are related with the lignocellulose degrading enzymes produced by the microorganism on such substrate. Thus, Streptomyces sp. UAH 47 was grown on wheat straw under solid-state fermentation and periodically the major solubilisation product of this substrate (lignin–carbohydrate complex) and the residual wheat straw were pyrolysed. In parallel, ...
Tópico(s): Lignin and Wood Chemistry
2001 - Elsevier BV | Journal of Analytical and Applied Pyrolysis
Carmen Lozano Fernández, Jhon James Mora, Juán Soliveri, José Luis Copa-Patiño, M.I. Pérez-Leblic, M. E. Arias,
Abstract The production of 4 extracellular xylanolytic enzymes, arabinofuranosidase, endoxylanase, β‐xylosidase and acetyl esterase during the growth of Streptomyces chattanoogensis UAH 23 in basal salts media containing different carbon sources was examined. The highest enzyme activities were generally detected when arabinoxylan was used as the carbon source, with the exception of acetyl‐esterase where greatest activity was detected when ball‐milled straw was used as carbon source. A comparison ...
Tópico(s): Polysaccharides and Plant Cell Walls
1995 - Wiley | Journal of Basic Microbiology