bluuebunny/crossref_metadata_2025 huggingface dataset:
Aproximación Etnolingüística: Nombres de los peces en lengua tikuna, San Pedro de Los Lagos
Authors: Gómez Santos Maria Alejandra
Published: January 2020

Este avance de investigación presenta una lista de 131 nombres de peces, correspondientes a 147 especies, en lengua indígena tikuna de la comunidad San Pedro de Los Lagos (sistema lagunar Yahuarcaca, amazonia colombiana). Los nombres de algunos peces muestran una carga semántica que se ve reflejada en los cantos, historias, creencias y alimentación[i] de los Tikuna. El análisis se enfocó en la estructura de la lengua y la conceptualización de los nombres de peces[ii]. En este avance de investigación se identificaron dos grupos de nombres:a nivel morfológico, se presentan nombres de peces con morfemas de aspecto, forma, tamaño, color, relación onomatopéyica, hábitat y alimentación.a nivel semántico, se identificaron nombres motivados que refieren a partes del cuerpo humano, a herramientas que los Tikuna utilizan, a diferentes animales de la selva, a alimentos que cultivan y a estados de ánimo; ciertos sonidos onomatopéyicos son reconocidos como nombres de algunos peces.Los hablantes tikuna caracterizan los peces de manera parcial, es decir, culturalmente conocen y entienden la importancia de los peces. Sin embargo, en la morfología apenas se presentan algunos rasgos morfológicos y semánticos.[i] La dieta/alimentación de los tikuna no está relacionada sólo por cuestiones de salud sino también por cuestiones sociales como no comer ciertas especies porque son socialmente prohibidas o porque existen épocas para las mujeres y los niños donde no pueden consumir cualquier pescado.[ii] A partir de sus conocimientos locales fue posible comprender cómo conciben y categorizan información de la biodiversidad que los rodea.
Reminiscences of Juan Carlos Peña, with some local color added
Authors: Weiskopf Jimmy
Published: January 2020

Colombo-American writer and translator Jimmy Weiskopf remembers the Colombian anthropologist Juan Carlos Peña Márquez, who died on August the 5th of 2019. Juan Carlos was professor of anthropology at the Universidade Estadual do Amazonas in Tabatinga and Universidade Federal do Amazonas in Benjamin Constant, and a close collaborator of the Sede Amazonia of Universidad Nacional de Colombia in Leticia.
A primer for teaching enviromental history: Ten Design Principles
Authors: Palacio Germán
Published: January 2020

Emily Wakild y Michel K. Berry (2018).  A primer for teaching enviromental history: Ten Design Principles. Duke University Press, Durham y London. 200 p. https://doi.org/10.1215/9780822371595ISBN: 978-0-8223-7159-5
Uma nova história antiga
Authors: Henriques Soares Guilherme
Published: January 2020

Nesta resenha do livro de James Scott, "Against the Grain", apresento um balanço das principais ideias levantadas pelo autor, com destaque para as controvérsias entorno do conceito de domesticação.
Redes Arawa: ensaios de etnología no Meio Purus
Authors: Bolívar-Urueta Edgar
Published: January 2020

Gilton Mendes dos Santos y Miguel Aparicio (Orgs). (2016). Redes Arawa: ensaios de etnología no Meio Purus. Manaus: EDUA Editora UFAM. 346 p. ISBN 978-85-7401-829-4
Strategies to Enhance or Maintain Motivation in Learning a Foreign Language
Authors: Muñoz-Restrepo Ana , Ramirez Marta , Gaviria Sandra
Published: January 2020

Motivation is one of the most important factors in the enjoyment and success in learning any subject, especially a foreign language. Many students approach the learning of a language based on academic mandates, family impositions, job requirements, and so on. These non-intrinsic motivations make learning a more difficult, frustrating, and non-pleasurable experience, both for students and teachers. Therefore, skills in motivating learners should be seen as central to teaching effectively. In this article, we provide a series of strategies for teachers to gradually lead students from an extrinsic motivation to a more internal and autonomous motivation. This approach is framed within one of the most recent and well-known theories of motivation: self-determination theory.
Education Professionals as Facilitators of Study Abroad Programs in Spain: Formal Training Needs
Authors: Herencia Grillo Amalia , Hernández de la Torre Elena
Published: January 2020

This paper investigates an aspect of study abroad programs that has rarely been studied before: the training needs of local education professionals in Spain. Through a mixed-method, using a questionnaire completed by 103 participants, and interviews with 15 of them, we focus on their previous formal specific training and their perspective on the group of students they work with. Results show that most of them have rarely been trained on how to work as cultural facilitators for students from the US. This fact often creates a cultural gap and prevents the teachers from fulfilling their role as cultural bridges for students. Specific action needs to be taken in order to solve this lack of preparation in this group of professionals.
Differences Between Native English-Speaking Teachers and Their Non-Native Counterparts When Evaluating Pronunciation
Authors: Arcaya Mauricio
Published: January 2020

This article is a small-scale qualitative study whose objective was to identify differences between the way in which native English teachers and their non-native Chilean counterparts assess pronunciation. To achieve this, teachers from both groups were asked to assess the same material produced by two students of English pedagogy in a Chilean university. The results show that native English teachers rate students higher than their non-native colleagues. This is apparently due not only to differences in training but also the differences in the processes of acquisition. The outcome of this research concerns anyone interested in teaching and learning English as a second/foreign language.
Becoming Language Teacher-Researchers in a Research Seedbed
Authors: Mesa Villa Claudia Patricia , Gómez-Giraldo John S. , Arango Montes Rodolfo
Published: January 2020

In this paper, a teacher-educator and two students of a B.A. program in foreign language teaching (English and French) of a public university in Colombia discuss our pedagogical experiences in a research seedbed. First, we present the conceptualizations underlying our analysis: research seedbeds, undergraduate research education, and curriculum as a process. Second, we describe our contextual background. Third, we analyze our experiences using three themes: creating and recreating curriculum, negotiating the official and non-official curriculum, and taking positions as teacher-researchers. We conclude that research seedbeds can broaden the pedagogical repertoire of undergraduate research education in foreign language programs and that it becomes necessary to conduct studies in this area in Colombia.
Teaching English to Young Learners in Mexico: Teachers’ Perceptions About Their Teaching Contexts
Authors: Millán Librado Tania , Basurto Santos Nora M.
Published: January 2020

This paper discusses the perceptions that six English language teachers, from public schools in the south region of the state of Veracruz in Mexico, have about their particular teaching contexts. A qualitative approach was adopted, and main data collection was through semi-structured interviews. The results show that all teachers have mostly negative perceptions about their teaching conditions. It was concluded that urgent action is needed on the part of the government to improve the English as a foreign language scenario, especially now when the introduction of English as a foreign language has been proposed at even earlier ages in all levels of education in the country.
Definición y clasificación de las avenidas torrenciales y su impacto en los Andes colombianos
Authors: Aristizábal Edier , Arango Carmona Maria Isabel , García López Ingrid Kattherine
Published: January 2020

Las avenidas torrenciales son una de las amenazas de origen hidrometeorológico de mayor capacidad destructiva en términos de vidas humanas y pérdidas económicas, especialmente en ambientes montañosos y tropicales como Colombia. Sin embargo, no existe en nuestro país un consenso con respecto a la clasificación y terminología de eventos tipo flujos que permita caracterizar adecuadamente estos fenómenos. El presente artículo analiza el impacto, distribución espacial y temporal de dichos eventos en Colombia, y describe sus tipologías con base en las clasificaciones de fenómenos tipo flujo que se encuentran en el estado del arte. Se propone una clasificación de eventos tipo avenida torrencial para Colombia que incluye tres tipos de fenómenos: creciente súbita, inundación de escombros y flujo de escombros.Ideas destacadas: artículo de revisión que propone una clasificación para los eventos tipo avenida torrencial en Colombia a través de un estudio del estado del arte en el tema a nivel mundial y, además, un análisis del impacto, distribución espacial y temporal de las avenidas torrenciales en el país.
Proyectos hidroeléctricos y resistencias comunitarias en defensa de los ríos en Costa Rica: un análisis geográfico
Authors: Gutiérrez Arguedas Alberto , Villalobos Villalobos Dany
Published: January 2020

En Costa Rica, la mayor parte de la energía eléctrica generada proviene de plantas hidroeléctricas. No obstante, estas han traído consigo fuertes impactos socioambientales, provocando conflictos en decenas de comunidades del país. El artículo analiza la tensión entre la expansión de proyectos hidroeléctricos y las resistencias comunitarias en defensa de los ríos en Costa Rica, desde una perspectiva geográfica. Por tanto, se discuten e interpretan estos conflictos a través del mapeo de las plantas hidroeléctricas en operación, así como los núcleos de resistencia comunal frente a aquellas, a escala nacional. Para ello, se consultaron y combinaron diversos tipos de fuentes y se realizó una sistematización de dichos proyectos y resistencias. Entre los resultados se identificaron numerosos procesos de resistencia comunal en defensa de los ríos, ampliamente distribuidas por diferentes regiones del país. Muestra de ello es que muchos proyectos, que estaban planeados para ser construidos, fueron detenidos por estas resistencias, sobre todo en las últimas dos décadas. A raíz de estas luchas, se ha conformado un movimiento social en defensa de los ríos a escala nacional, posicionando a las comunidades y sus organizaciones como actores sociales y políticos en un campo que históricamente les había excluido de la toma de decisiones.Ideas destacadas: artículo de investigación que analiza la tensión existente entre la expansión hidroeléctrica y las resistencias comunitarias en defensa de los ríos en Costa Rica, desde una perspectiva geográfica. A raíz de estas resistencias, se ha conformado en las últimas dos décadas un movimiento social en defensa de los ríos a escala nacional.
Acessibilidade ao sistema de transporte coletivo por ônibus: indicadores para os municípios da periferia metropolitana e os campos de Belo Horizonte, Brasil
Authors: Lobo Carlos , Cardoso Leandro , Lessa Daniela Antunes , Miranda Giovanni Cândido
Published: January 2020

Atualmente, o ônibus apresenta-se como primordial modo de transporte das principais metrópoles brasileiras. Com o objetivo de avaliar a acessibilidade por ônibus na Região Metropolitana de Belo Horizonte, este trabalho apresenta indicadores de acessibilidade que utilizam o número de linhas, a frequência de viagens e o total de conexões aos municípios periféricos e aos campos de Belo Horizonte (unidades espaciais da pesquisa origem-destino). Os resultados revelam alta variação regional, com maiores níveis de acessibilidade para municípios de maior porte efetivamente conurbados com a capital, como Betim e Contagem. Em Belo Horizonte, prevalecem valores mais baixos, exceto para os campos do Central Business District (CBD) e para aqueles no eixo oeste (sentido área industrial). Ao demonstrarem a elevada desigualdade regional de acessibilidade, os indicadores expostos reforçam a necessidade de investimentos para obter mais eficiência e equidade do sistema. Ideias destacadas: artigo de pesquisa que pretende avaliar as condições de acessibilidade ao transporte público por ônibus na Região Metropolitana de Belo Horizonte, Brasil. A análise reflete sobre o papel da acessibilidade como importante componente das condições de desigualdade econômica e social intrametropolitana.
Caracterización morfosedimentaria del depósito tipo playa ubicado en San Francisquito, estado Miranda, Venezuela
Authors: Nuñez Franklin Antonio , Garrido Sansonetti Diana , Calderón Castellanos Rossany , Ugas Pérez Maria
Published: January 2020

El reconocimiento de la dinámica morfosedimentaria de los espacios costeros constituye un elemento de interés, a fin de comprender la acción de los agentes y procesos involucrados en la constitución del paisaje. De allí que la investigación planteó precisar los rasgos morfosedimentarios de playa San Francisquito, en el litoral mirandino venezolano. Se sustentó en tres fases investigativas: 1) campo: recolección de sedimentos superficialescada 100 metros en las distintas posiciones del perfil de playa, y registro de parámetros morfodinámicos del oleaje; 2) laboratorio: análisis de las arenas en sus parámetros físicos (textura del material, parámetros de la distribución granulométrica) y químicos (contenido de CaCO3, fracción de minerales pesados y livianos); y 3) oficina: análisis estadístico de los datos obtenidos. El depósito presenta una forma elongada, con arenas medias (berma) y gruesas (vaivén y la rompiente), moderadamente seleccionadas y con distribución leptocúrtica; mineralógicamente compuesto por el >80% CaCO3, así como el 8% de fracción liviana, con cuarzo de bordes subangulares a subredondeados, y en promedio el 6% de minerales pesados. El oleaje presenta alturas de 28,83 cm y velocidad de 1,52 cm/s. Los bioclástos provienen de la barrera arrecifal que flanquea el depósito, así como en el banco de La Tortuga, ubicado a unos 79 km al NE. Ideas destacadas: artículo de investigación, mediante el cual se caracterizan los rasgos morfosedimentarios manifiestos en la configuración de la playa San Francisquito, ubicada en el litoral mirandino, en la fachada Caribe de Venezuela.
Cuerpos con aguante: festividad y violencia en una barra brava de Bogotá
Authors: Castro Lozano John Alexander
Published: January 2020

El artículo busca comprender y explicar las formas de exponer el cuerpo entre los hinchas que integran una barra brava de Bogotá. El texto se elaboró desde el trabajo de campo etnográfico, es decir, a partir de la presencia frecuente en distintas actividades del grupo social y en las conversaciones con los sujetos miembros. En Colombia, las barras bravas iniciaron su proceso de constitución durante la década de 1990. Los grupos organizados de hinchas mostraron renovadas expresiones festivas que buscaban apoyar a su equipo de fútbol, a través de banderas, sombrillas, papel, humo de colores, pirotecnia y canciones adaptadas al contexto del fútbol. En las canciones también se evidenciaron burlas, insultos, desafíos y amenazas contra hinchas rivales y, además, en los enfrentamientos corporales los hinchas incluyeron piedras, palos de madera, varillas, armas blancas o de fuego. La festividad y la violencia se denominan el carnaval y el combate, respectivamente, y constituyen el denominado aguante en las barras bravas.El carnaval y el combate no son contradictorios, sino complementarios e implican estar presente en las tribunas y en las calles. Por eso, los hinchas deben participar en las expresiones festivas y en las manifestaciones violentas, dado que es necesario alentar al equipo de fútbol y pelear contra los hinchas rivales. Por su parte, el aguante es una noción y una práctica originaria de los grupos organizados de hinchas de Argentina, adoptada y adaptada por distintas barras bravas de Hispanoamérica. Este permite demostrar la alegría y la valentía de los hinchas, opuesta a la amargura y la cobardía de los rivales. En otras palabras, el aguante solo es posible si es expuesto ante los otros hinchas del mismo equipo y de otros clubes; sin embargo, es dinámico y mutable, al estar relacionado con las diferentes generaciones de hinchas que han integrado a los grupos organizados. El carnaval y el combate no son contradictorios, son complementarias entre las barras bravas e implica estar presente en la tribuna y en las calles. Por eso, los hinchas deben participar en las expresiones festivas y en las manifestaciones violentas ya que es necesario alentar al equipo de fútbol y pelear contra los hinchas rivales. El aguante es una noción y una práctica originaria de los Grupos Organizados de Hinchas de Argentina, adoptada y adaptada por distintas barras bravas de Hispanoamérica. El aguante permite demostrar la alegría y la valentía de los hinchas, opuesta a la amargura y la cobardía de los rivales. En otras palabras, el aguante sólo es posible si es expuesto a los otros, hinchas del mismo equipo y de otros clubes. Sin embargo, el aguante es dinámico y mutable, al estar relacionado con las diferentes generaciones de hinchas que han integrado a los grupos organizados.
On the importance of being primitive
Authors: Bell Jason
Published: January 2020

We give a brief survey of primitivity in ring theory and in particular look at characterizations of primitive ideals in the prime spectrum for various classes of rings.
A short survey on observability
Authors: Ferrer Santos Walter
Published: January 2020

The exploration of the notion of observability exhibits transparently the rich interplay between algebraic and geometric ideas in geometric invariant theory. The concept of observable subgroup was introduced in the early 1960s with the purpose of studying extensions of representations from an afine algebraic subgroup to the whole group. The extent of its importance in representation and invariant theory in particular for Hilbert's 14th problem was noticed almost immediately. An important strenghtening appeared in the mid 1970s when the concept of strong observability was introduced and it was shown that the notion of observability can be understood as an intermediate step in the notion of reductivity (or semisimplicity), when adequately generalized. More recently starting in 2010, the concept of observable subgroup was expanded to include the concept of observable action of an afine algebraic group on an afine variety, launching a series of new applications and opening a surge of very interesting activity. In another direction around 2006, the related concept of observable adjunction was introduced, and its application to module categories over tensor categories was noticed. In the current survey, we follow (approximately) the historical development of the subject introducing along the way, the definitions and some of the main results including some of the proofs. For the unproven parts, precise references are mentioned.
The Pedersen Rigidity Problem
Authors: Kaliszewski S. , Omland Tron , Quigg John
Published: January 2020

If is an action of a locally compact abelian group G on a C*-algebra A, Takesaki-Takai duality recovers (A, α) up to Morita equivalence from the dual action of Ĝ on the crossed product A × α G. Given a bit more information, Landstad duality recovers (A, α) up to isomorphism. In between these, by modifying a theorem of Pedersen, (A, α) is recovered up to outer conjugacy from the dual action and the position of A in M(A ×α G). Our search (still unsuccessful, somehow irritating) for examples showing the necessity of this latter condition has led us to formulate the "Pedersen Rigidity problem". We present numerous situations where the condition is redundant, including G discrete or A stable or commutative. The most interesting of these "no-go theorems" is for locally unitary actions on continuous-trace algebras.
A note on deformations of Gorenstein-projective modules over finite dimensional algebras
Authors: Vélez-Marulanda José A.
Published: January 2020

In this note, we present a survey of results concerning universal deformation rings of finitely generated Gorenstein-projective modules over finite dimensional algebras.
Connes-Landi spheres are homogeneous spaces
Authors: Wilson Mitsuru
Published: January 2020

In this paper, we review some recent developments of compact quantum groups that arise as θ-deformations of compact Lie groups of rank at least two. A θ-deformation is merely a 2-cocycle deformation using an action of a torus of dimension higher than 2. Using the formula (Lemma 5.3) developed in [11], we derive the noncommutative 7-sphere in the sense of Connes and Landi [3] as the fixed-point subalgebra.
Optimización del proceso de extracción de compuestos fenólicos de la angiosperma marina Thalassia testudinum
Authors: Núñez Moreira Roberto , Quintana Ricardo Lissette , Gutiérrez-Cuesta Richard , Valdés Iglesias Olga , González García Kethia L. , Hernández Rivera Yasnay , Acosta Suarez Yulexi , Ortiz Guillarte Eudalys
Published: January 2020

Thalassia testudinum es la planta marina de mayor abundancia en el litoral de La Habana y del Caribe en general, conocida comúnmente como praderas submarinas o hierba de tortuga. Entre los compuestos de interés que se pueden encontrar en esta especie sobresalen los polifenoles, los cuales son componentes estructurales de su pared celular y poseen propiedades funcionales y bioactivas como antioxidante, anti-inflamatorio, neuroprotector y hepatoprotector. Investigaciones previas evaluaron diversos métodos de extracción de compuestos bioactivos para esta especie, por lo que este trabajo tuvo como objetivo optimizar las condiciones de extracción del contenido de polifenoles totales. Para ello se utilizó el método de Box y Hunter y se evaluó el efecto de tres factores influyentes en la extracción de compuestos fenólicos (velocidad de agitación, relación material vegetal/% alcohol y concentración de etanol). Como variable respuesta se empleó el contenido de polifenoles totales determinada por el método de Folin-Ciocalteu. Los resultados del diseño proporcionaron como condiciones óptimas en las variables estudiadas las siguientes: 1/11.5 p:v, 60% de EtOH y 800 r.p.m., alcanzando rendimiento de polifenoles totales, igual a 25.60 mg/g de extracto seco; superior a las restantes condiciones de extracción para un extracto bioactivo con potencialidades de uso en la industria farmacéutica o nutracéutica.
Review of Lactobacillus in the food industry and their culture media
Authors: Sánchez Óscar J. , Barragán Pedro J. , Serna Liliana
Published: January 2020

Lactic acid bacteria (LAB) are currently of great importance given their increasing use in the improvement of human and animal health and nutrition. They exhibit complex nutritional requirements, which is the reason why their production costs are high. Research efforts are being made aimed at evaluating different substrates for their production as well as the production of valuable metabolites from them. The purpose of this paper is to expose the main research and development trends for LAB production for industrial purposes with emphasis on the culture media required for their growth. The web of Science databases as well as the Google Patent Search tool were used in order to gather and analyze the scientific and technical information published in the last twelve years relating to LAB and their culture media. The use of milk, industrial cheese whey, cane molasses, hydrolyzed starches, lignocellulosic materials, organic food waste and bovine blood plasma, among others, have been proposed for Lactobacillus cultivation with the purpose of reducing costs and increasing performance in their production. Research groups and centers have the responsibility of intensifying their efforts to offer highly efficient technological alternatives to the industry that allow the production and application of LAB as a growth factor for the food sector. Also, research in prebiotic ingredients or additives derived from LAB that allow the enhancement of the benefits to the consumer must be continued. In this regard, it is necessary to increase the international visibility of Colombian scientific production in this area.
In vitro tissue culture, preliminar phytochemical analysis, and antibacterial activity of Psittacanthus linearis (Killip) J.K. Macbride (Loranthaceae)
Authors: Wagner Marcelo Luis , Rojas Idrogo Consuelo , Delgado Paredes Guillermo Eduardo , Balladares Ballona Juan Pablo
Published: January 2020

Hemiparasitic plants commonly known as mistletoe (muérdago in Spanish) in the families Santalaceae and Loranthaceae are common in various kinds of plants or trees, and many hemiparasitic plants are used for medicinal purposes in various parts of the world. The objective of the present work, carried out in Psittacanthus linearis (suelda con suelda), a representative species in the seasonally dry forest (SDF) from the north of Perú, was to study aspects of in vitro tissue culture, carry out preliminary phytochemical analysis, and assess antibacterial activity. Seeds of individuals of P. linearis, which used Prosopis pallida (algarrobo) as host plant, were collected and used to induce in vitro seed germination, clonal propagation, callus induction and organogenesis. Stems, leaves and fruits of individuals of P. linearis were dried, powdered, and subjected to ethanol extraction. Posteriorly the extract was first recovered with ethanol and the remnant with chloroform, which formed the ethanolic and chloroformic fraction. A preliminary phytochemical screening was performed and preliminary antibacterial studies with Staphylococcus aureus, Escherichia coli, and Pseudomonas aeruginosa were carried out and their results are discussed. This is the first report about in vitro tissue culture, phytochemical analysis and antibacterial activity of P. linearis. The results may have important implications for understanding physiological and biochemical interactions between host and hemiparasitic species as well as P. linearis with P. pallida and other SDF species.
Prevalence of organ-space surgical site infections after appendectomy for ruptured appendix in children
Authors: Holguín-Sanabria Diana Alejandra , Perilla-López Miguel Ángel , Castañeda-Espinosa Sergio , Jaimes-de La Hoz Paula , Aragón Silvia , Valero Juan Javier , Molina Iván Darío , Fierro-Ávila Fernando
Published: January 2020

Introduction: Appendicitis can be classified as non-perforated and perforated; based on such classification, the reported organ-space surgical site infection (OS-SSI) rate is 0.8% and 18%, respectively.Objective: To establish the prevalence of OS-SSI in patients with perforated appendicitis treated in a pediatric hospital in 2012.Materials and methods: Retrospective, observational and descriptive study conducted at Fundación Hospital Pediátrico La Misericordia, with a random sample of 200 patients, of which 160 met the inclusion criteria.Results: 20 patients (12.5%) presented with OS-SSI and all of them received antibiotic treatment; 70% did not require abscess drainage. Patients ≥8 years of age had 5 times more abscesses than younger ones (17.6% vs. 3.4%). OS-SSI was found in 33% of patients with free fecalith and in 50% of the patients who required postoperative management at the ICU vs. 9.5% of the patients who received management in the intermediate care unit and the inpatient hospital floors. The total rate of surgical site infection was 24.3% (11.8% superficial, 0% deep and 12.5% organ-space).Conclusions: The prevalence of OS-SSI found here is lower than what has been reported in the literature. Being 8 years or older and having free fecalith are risk factors to develop this type of infection. The higher frequency of OS-SSI in patients treated at the ICU during the post-operative period observed here suggests that this condition may be associated with septic shock.
Absence of RET/PTC1 rearrangement in a sample of Colombian individuals with papillary thyroid carcinoma
Authors: Rubio-Gómez Cladelis , Rojas William , Polo José Fernando , Alvarado Alejandra , Chaparro Diana , Torres-Tobar Lilian , Gutiérrez-Castañeda Luz Dary
Published: January 2020

Introduction: Papillary thyroid carcinoma is the most common endocrine neoplasm; therefore, markers with possible prognostic utility have been evaluated.Objective: To analyze the presence of RET/PTC1 rearrangement, lymphocytic thyroiditis and associated clinical features in patients with papillary thyroid cancer treated at the Hospital de San José in Bogotá, Colombia.Materials and methods: Clinical records of patients with complete thyroidectomy and diagnosis of papillary cancer were retrospectively identified. RNA was extracted from tumor tissue, and cDNA was obtained using inverse transcriptase to detect the rearrangement of the RET/PTC1 gene by means of qPCR.Results: 55 patients with papillary thyroid cancer were selected; 93% were females, and the mean age was 45.8 years. The most frequent histological variant was classic (49%). A relationship was found between lymphocytic thyroiditis and the number of positive nodes in segments other than central draining, as well as thyroiditis and antithyroid antibody value. No RET/PTC1 rearrangement expression was found.Conclusions: A relationship between lymphocytic thyroiditis and the number of positive nodes in segments other than central draining was found. Other molecular markers should be searched to differentiate the prognosis of these patients.
Effects of muscle energy technique for quadratus lumborum on respiratory muscle strength in patients with breast cancer
Authors: Espinosa-López Andrea Milena , Daza-Arana Jorge Enrique , Pinzón-Sanabria Lina Marcela , Perdomo-Quiroga Yuleidy , Ruiz-Jiménez Jhoana Patricia
Published: January 2020

Introduction: Breast cancer is a major cause of morbidity and mortality, leading to functional deficiencies in ventilation, muscle performance, balance and posture.Objective: To describe the effects of the muscle energy technique (MET) for quadratus lumborum on maximal inspiratory pressure (MIP) and maximal expiratory pressure (MEP) in patients with stage I and II breast cancer.Materials and methods: Quasi-experimental study with a pretest-posttest design conducted in 10 patients treated at a highly specialized healthcare center in Bogotá. Physical therapy assessment and three physiotherapy sessions with the MET to measure MIP and MEP were carried out before and after the intervention using a respiratory pressure meter.Results: The average MIP was 41% of the reference value at the beginning of the intervention, which increased to 69% at the end of the sessions. On the other hand, the initial average MEP was 33%, while the post-intervention average MEP was 51%. The average change rate for MIP was 68% and 57% for MEP. The Wilcoxon signed-rank test was performed, achieving a statistically significant difference (z=-2.807, p=0.005).Conclusion: Applying the MET on the quadratus lumborum muscle improves its performance and increases respiratory muscle strength.
Rare complications of Staphylococcus aureus infection in children: Case reports
Authors: Riascos-Pinchao Gloria Alejandra , Lozano-Triana Carlos , Camacho Moreno Germán , Landínez-Millán Guillermo
Published: January 2020

Disseminated staphylococcal disease comprises a set of clinical manifestations secondary to multiple organ invasion that may range from cellulitis to sepsis. In pediatrics, the most common complications are osteoarticular and cutaneous infection; however, this article presents rare manifestations such as glomerulonephritis and thrombotic phenomena. This is the report of two cases of previously healthy adolescents: one presented with osteomyelitis and kidney injury, and the other, with lower limb cellulitis and respiratory deterioration with septic pulmonary embolism. The diagnostic process and additional management are described, highlighting the role of oxacillin in therapy. This article aims to highlight the importance of considering the rare manifestations of S. aureus infection, when the clinical evolution is abnormal, in order to initiate a timely treatment and get a better prognosis.
Occupation and correlation between perceived quality of work life, emotional intelligence and coping strategies in university graduates
Authors: Páez-Cala Martha Luz , Castaño-Castrillón José Jaime
Published: January 2020

Introduction: Emotional intelligence is a decisive factor for adaptation to the work environment.Objective: To inquire into the employment location and the correlation between perceived quality of work life, emotional intelligence and stress coping strategies in graduates of a university from Manizales.Materials and methods: Analytical cross-sectional design. From a population of 1 245 graduates, 149 were asked about their working conditions using the CVP35 questionnaire on quality of work life, the TMMS-24 questionnaire on emotional intelligence, and the CRI-Y questionnaire on stress coping strategies.Results: 88.6% of the respondents work; 51.7% of them have a full-time job. In the CVP35, 53% of the participants were classified in the “quite a lot” category for the workload domain, 63.1% for the intrinsic motivation domain, 51.7% for the managerial support domain, and 4% for the perceived quality of life domain. Regarding the TMMS-24 questionnaire, 59.1% should improve their perception, 48.3% have an adequate level of comprehension, and 51% have adequate regulation. The level of emotional intelligence positively influences both the perception of quality of work life (QWL) and the type of stress coping strategies that are used.Conclusions: Emotional intelligence has a significant influence on young professionals’ perception of QWL, and thus on their work performance; therefore, their comprehensive training requires the inclusion of emotional competences in the different curricula in order to counteract the negative effects of work stress to improve their perception of QWL, so that, this way, they have a better work performance and a higher productivity when they enter the labor market.
Occupational history of exposure to zoonotic agents in people dedicated to livestock in San Pedro de los Milagros, Antioquia, Colombia
Authors: Molina-Guzmán Licet Paola , Ríos-Tobón Sandra , Cardona-Lopera Ximena , Lopera Jaime Alberto , Ríos-Osorio Leonardo Alberto , Gutierréz-Builes Lina Andrea
Published: January 2020

Introduction: According to the World Health Organization, livestock farming is one of the anthropic activities in which workers are exposed to various zoonotic agents.Objectives: To establish the frequency of seropositivity (IgG antibodies) against some zoonotic agents in people with occupational exposure to livestock in San Pedro de los Milagros (Antioquia), and to analyze associated factors.Materials and methods: Descriptive study carried out on a population of 328 cattle farmers. Demographic data were collected and the seropositivity frequency of IgG antibodies to Babesia bovis, Babesia bigemina, Anaplasma phagocytophilum, Ehrlichia chaffensis, Borrelia burgdorferi, Coxiella burnetii, Francisella tularensis, Brucella abortus, Brucella suis, Leptospira interrogans, and Toxoplasma gondii was determined. Overall and specific prevalence, prevalence ratios and binary logistic regressions were estimated.Results: The highest seropositivity frequencies were 47.6% for T. gondii, 33.5% for B. burgdorferi and 13% for E. chaffensis. The prevalence of T. gondii and B. burgdorferi had statistical association with sex [RP:1.3 (CI:1.0-1.8) and 2.0 (CI:1.1-3.9) respectively], and age group [(RP:1.5 (CI:1.2-1,9) and 2.5 (CI:1.4-6.4) respectively]. In workers with more than 10 years of related work experience, statistical association was 50% [RP:1.5 (CI:1.2-1.9) and 2.5 (CI:1.6-2.3), respectively]. There were no seropositive results for B. abortus, B. suis, B. bovis and B. bigemina.Conclusions: Exposure to some zoonotic agents was evidenced. This is determinant for the knowledge of tropical zoonotic diseases transmitted by vectors in livestock production systems.
Effects of explosive and impact exercises on gait parameters in elderly women
Authors: Ramírez-Villada Jhon Fredy , Cadena-Duarte Laura Lorena , Gutiérrez-Galvis Adriana Rocío , Argothy-Bucheli Rodrigo , Moreno-Ramírez Yesica
Published: January 2020

Introduction: Several systematic reviews and meta-analyses have suggested that physical activity programs combining low impact exercises and resistance exercises help maintaining functional capacity in older adults.Objective: To analyze the effects of an aquatic training program involving both impact and explosive exercises on gait parameters of women aged 60 and above.Materials and methods: 60 physically active women (64.08±3.98 years) were divided into 2 groups: those training in a pool by performing series of jumps, i.e., the experimental group (EG= 35), and the control group (CG=35). EG participants trained 3 times per week during 32 weeks in an hour per session basis. Body composition measurements, explosive strength, and gait parameters (in a 6 meters long track) were assessed using the center of pressure (COP) indicator before and after participating in the training program.Results: When comparing both groups, differences in explosive strength and power (EG vs. CG; p values=from 0.05 to 001) were observed, as well as changes in gait parameters related to the COP (EG vs. CG: p = 0.05-001), in particular EG participants had significant and positive changes.Conclusion: The aquatic training program described here produced an increase in muscle strength and muscle power, thus gait parameters were improved. Bearing this in mind, an improved availability of similar programs for older adults should be considered, since their participation in these programs could help them improve their functional capacity, and, thus, their quality of life.
Análisis morfométrico e índices corporales del capitán de la sabana (Eremophilus mutisii)
Authors: Moreno Jenny Marcela , Aguilar Fredy Armando , Boada Nelson Sebastian , Rojas Jhon Alexander , Prieto Camilo Alberto
Published: January 2020

Con el objetivo de caracterizar la morfometría e índices corporales de Eremophilus mutisii, se usaron treinta y tres peces (27 hembras y 6 machos) provenientes del río Bogotá, específicamente de la región de Suesca. La relación de aspecto de la aleta caudal se determinó mediante el software de análisis de imágenes ImageJ®. Se calculó el índice gonadosomático, hepatosomático y rendimiento en canal para cada pez. Para el análisis de los datos se usaron correlaciones, regresiones y técnicas de análisis multivariado (análisis discriminante canónico). Como resultado del estudio se encontró que el sexo no afecta la forma del cuerpo de los peces. La relación entre la longitud y el peso se ajustó para cada sexo. La relación de aspecto de la aleta caudal presentó un promedio de 1,57 lo que sugiere que la especie presenta hábito sedentario o de natación lenta. El índice gonadosomático de las hembras en maduración (media: 14,43%, rango: 8,84% a 23,22%) aumentó en función del peso corporal y fue mayor que el de los machos (media: 5,32%, rango: 2,31% a 8,29%). Por lo tanto, el rendimiento de la carcasa fue menor en las hembras en maduración. La media del índice hepatosomático para hembras fue 0,86% (rango: 0,43% a 1,88%) y para machos fue 0,63% (rango: 0,39% a 1,09%). En conclusión, Eremophilus mutisii es una especie sedentaria y las hembras se caracterizarán por presentar mayor índice gonadosomático y menor rendimiento en carcasa que los machos.
Edible coating based on achira starch containing garlic/oregano oils to extend the shelf life of double cream cheese
Authors: Molina-Hernández Junior B. , Echeverri Castro Andrés , Martinez-Correa Hugo A. , Andrade-Mahecha Margarita M.
Published: January 2020

Edible coatings provide food products with a barrier to gases and water vapor exchange; additionally, when complemented with antimicrobial agents, they can be suitable to extend food shelf life. This study aimed to evaluate the effect of using edible coatings based on achira starch (Canna indica L.), microcrystalline cellulose, and natural antimicrobial compounds (garlic and oregano oils) on the quality of double cream cheese during storage at 5 °C for 42 days. The physicochemical characteristics of the cheeses, such as weight loss, hardness, water activity, and color, were evaluated on days 1, 8, 21, and 42. The microbiological analyses were carried out on days 1, 21, and 42, and the sensorial analysis on days 1 and 42. The coated cheese samples maintained the pH value of fresh products during storage, whereas the pH of the uncoated samples progressively decreased. No effect (P≥0.05) was observed at the different storage times on the weight and color of the coated samples, as compared to the control. The hardness of the coated samples was lower (50% for oregano oil treatment and 18% for garlic oil treatment) at the end of the storage, with a significant difference (P≤0.05) from the control. Additionally, the use of coatings containing garlic or oregano oil prevented the growth of pathogenic or contaminating microorganisms on the product during 42-day storage. The results indicated that the use of edible coatings incorporating garlic or oregano oil as antimicrobial compounds are an alternative to extend the shelf life of double cream cheese.
Agronomic and physiological evaluation of eight cassava clones under water deficit conditions.
Authors: Leon Pacheco Rommel Igor , Pérez Macias Mercedes , Fuenmayor Campos Francia Concepción , Rodríguez Izquierdo Adrián José , Rodríguez Izquierdo Gustavo Adolfo
Published: January 2020

Cassava (Manihot esculenta Crantz) is an important crop in Africa, Asia, Latin America, and the Caribbean. This species grows adequately in drought conditions and is ideal to ensure food safety in marginal environments, such as soils with low fertility and low rainfall conditions. Complementary irrigation practices can be used, or genotypes with good yield potential can be identified against these conditions to enhance productivity in those environments. For this reason, this research aimed to study several physiological mechanisms and agronomical characteristics in eight cassava clones under prolonged water deficit. The experimental design was a split-plot where the principal plot was composed of three irrigation treatments (7, 15, and 21 days without irrigation, DWI) and the secondary plot by the eight clones. The results showed that cassava plants against drought conditions (21 DWI) decreased their growth, foliar expansion, and partially closed the stomata, avoiding water losses through transpiration. The variables of the net assimilation rate of CO2, yield, and biomass accumulation were not affected by the maximum drought period. The best clones under drought were Guajira, Guajira 3, Guajira 4, Concha Rosada, and MeVen 77-1. The frequency of irrigation 15 DWI increased the variables of gas exchange and vegetative growth. This behavior is due to the ability to tolerate complex conditions through morphological and physiological mechanisms, among them, long life leaf, stomatal control, and high photosynthetic potential.
Comparison of antioxidant contents of green and red leaf lettuce cultured in hydroponic systems under greenhouse, and conventional soil culture.
Authors: Zapata-Vahos Isabel Cristina , Rojas-Rodas Felipe , David Dorely , Gutierrez-Monsalve Jaime A. , Castro-Restrepo Dagoberto
Published: January 2020

Hydroponic technologies have increased the cultivated area under greenhouses covered with UV filter polyethylene film. However, there is a concern about the antioxidant contents of lettuces produced under these systems. In this study, it was compared to the antioxidant contents of green and red leaf lettuces produced in two hydroponic systems in a greenhouse, against the ones produced with the conventional cultivation system by Colombian farmers. The antioxidant analysis revealed significant statistical differences for DPPH and Anthocyanin analyses (P=0) versus all other culture systems. The best results were obtained in the conventional cultivation. Red lettuce obtained the highest value of FRAP (655.3±82.6 mgAAE 100g-1), ABTS (17.8±6.9 mmolTE 100g-1), total phenols (680.2±69.3 mgGAE 100g-1) and anthocyanin (126.2±6.9 mgC3G 100g-1). Green lettuce exhibited the most antioxidant activity of DPPH (20.7±5.6 mmolTE 100g-1). These results suggest a detrimental effect of the greenhouse covered with UV filter polyethylene film in the antioxidant production of lettuce. Finally, red leaf lettuce showed better antioxidant capacity independent of the cultivation system.
Morphological characterization of Matisia cordata Bonpl. in a tropical dry forest from Antioquia, Colombia
Authors: Álvarez-Osorio Verónica M. , Muriel-Ruíz Sandra B. , Cotes-Torres José M.
Published: January 2020

Characterization of plant genetic resources is the first step to conserve plant diversity. Morphoagronomic characterization is a method that requires a selection of sensible descriptors, which are characteristics that define a phenotype. Sapodilla (Matisia cordata Bonpl.) is a plant genetic resource and is an important part of the agricultural tradition of the nearby western of Antioquia (Colombia). However, the lack of scientific information about this species shows that it is an underutilized fruit. The local community, in its traditional knowledge, recognizes two phenotypes of sapodilla: Creole and Ecuadorian. The phenotypic diversity of 100 trees of M. cordata was evaluated from 28 morphoagronomic descriptors. The Gower distance and UPGMA method were used to determine the diversity and make the dendrogram, respectively. The Bayes methodology was used to obtain the highest posterior density intervals of 95% probability and compare both phenotypes. Trees of the Creole phenotype had elliptical crown and acute shaped fruits, whereas the Ecuadorian phenotype presented a pyramidal crown and diverse fruit shapes. The Creole phenotype had stems with larger diameter at chest height (28.8 cm), more knots (10 cm), smaller leaves (25 cm), lighter fruits (301 g), larger peduncles (15.6 mm), smaller (40 mm) and lighter seeds (30 g), and an epicarp and a darker pulp than the Ecuadorian phenotype. The farmers’ local knowledge was partially confirmed since most of the descriptors coincided with the local perception, except descriptors of color and flavor of the pulp.
In vitro Multiplication of Iraca palm (Carludovica palmata Ruíz & Pavón)
Authors: Hoyos Sanchez Rodrigo Alberto , Chicaíza Finley Diego , Zambrano Arteaga Juan Carlos
Published: January 2020

Carludovica palmata Ruíz & Pavón is a plant that belongs to the Cyclanthaceae family. Its commercial interest is related to the production of fibers for the manufacture of handicrafts, mainly the Panama hat, so it is important to study its propagation. This investigation aimed to determine the effect of 6-benzylaminopurine (BAP) in the formation of new shoots and 1-naphthaleneacetic acid (NAA) in the formation of roots, as well as the adaptation in greenhouse conditions of Carludovica palmata Ruíz & Pavón. In order to find the optimal multiplication rate, 0.5 cm length explants were planted in glass jars with 15 mL of semisolid MS with different concentrations of BAP and cultured under in vitro conditions for 90 days. The multiplication parameters in this stage were number of shoots per explant (NSE), length of shoots (LS), and length of roots (LR) as multiplication parameters. In a similar procedure, the number of roots per explant (NRE), length of roots (LR), and length of plantlets (LP) was determined using different concentrations of NAA. Finally, different substrates were evaluated for the adaptation of plantlets of C. palmata produced in vitro, under greenhouse conditions for 80 days. The highest multiplication rate (17±3 shoots per explant) was obtained with 2.0 mg L-1 of BAP. Root formation occurred efficiently in all treatments, without significant statistical differences between them. On the other hand, the use of substrate soil-t15 was the best treatment for the growth of C. palmata under greenhouse conditions. From the results obtained, it is concluded that C. palmata can be efficiently multiplied under in vitro conditions and did not present problems during the in vivo rooting process.