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Search Results: 1 - 10 of 211062 matches for " Andrea Arroyave-Rincón "
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Da?os por depredación y tama?o de concha del caracol diádromo Neritina virginea (Gastropoda: Neritidae) en el Río Mameyes, Puerto Rico
Blanco-Libreros,Juan Felipe; Arroyave-Rincón,Andrea;
Revista de Biología Tropical , 2009,
Abstract: predator damage and shell size on the diadromous snail neritina virginea (gastropoda: neritidae) in the mameyes river, puerto rico. we compared predators? damage with shell size in live individuals and empty shells (n=5066) of the snail neritina virginea in the mameyes river (puerto rico, greater antilles). according to the literature and direct observations, damages on empty shells were attributed to predation by aquatic birds (e.g. gallinula chloropus) and decapods (e.g. macrobrachium spp.), while damages on live individuals were due to rasping by co-specifics and erosion. predation by decapods and birds, as estimated by the proportion of empty shells, was low (2 and 0.36%, respectively). shell size was significantly different between types of predators (range: decapods: 3.5-15.0mm, birds: 8.1-19.4mm). by comparing sizes of the empty shells and the live individuals, we concluded that decapods specialize on large groups of small migratory juveniles, while birds specialize on the largest resident individuals. worn shells were highly frequent in both empty shells and live individuals, and sizes did not differ between samples. a comparison by slow-flow and fast-flow habitats showed that predators do not discriminate shell sizes between environments. however, the frequency of damage by birds and decapods was greater under slow-flow conditions. despite of the little contribution of predation to the population dynamics in this species, predation might be an important driver of size-dependent behavioral responses such as upstream migration and microhabitat selection. rev. biol. trop. 57 (4): 1069-1080. epub 2009 december 01.
Da os por depredación y tama o de concha del caracol diádromo Neritina virginea (Gastropoda: Neritidae) en el Río Mameyes, Puerto Rico
Juan Felipe Blanco-Libreros,Andrea Arroyave-Rincón
Revista de Biología Tropical , 2009,
Abstract: Se compararon las abundancias y tama os de conchas del gasterópodo Neritina virginea de acuerdo a los da os presentados en especimenes vivos y muertos (n= 5066) recolectados en el río Mameyes, Puerto Rico (Antillas Mayores). Se observaron da os por depredación de aves y camarones, y signos de erosión por la acción del raspado de la rádula por parte de otros individuos de la misma especie. La depredación fue aparentemente baja (<2.5%), pero los tama os de concha depredados por aves y camarones fueron significativamente diferentes. Las primeras se especializan en los individuos residentes más grandes, mientras que los segundos se especializan en individuos juveniles que presentan un comportamiento migratorio. Estos tama os no fueron diferentes entre dos hábitats, aunque se observó más conchas depredadas por decápodos que por aves. El desgaste fue común en conchas de todos los tama os. A pesar de su baja contribución a la dinámica poblacional de los gasterópodos, la depredación podría ser un control importante de respuestas de comportamiento dependientes del tama o, tales como la migración río arriba y la selección de microhábitats. Predator damage and shell size on the diadromous snail Neritina virginea (Gastropoda: Neritidae) in the Mameyes River, Puerto Rico. We compared predators’ damage with shell size in live individuals and empty shells (n=5066) of the snail Neritina virginea in the Mameyes River (Puerto Rico, Greater Antilles). According to the literature and direct observations, damages on empty shells were attributed to predation by aquatic birds (e.g. Gallinula chloropus) and decapods (e.g. Macrobrachium spp.), while damages on live individuals were due to rasping by co-specifics and erosion. Predation by decapods and birds, as estimated by the proportion of empty shells, was low (2 and 0.36%, respectively). Shell size was significantly different between types of predators (range: decapods: 3.5-15.0mm, birds: 8.1-19.4mm). By comparing sizes of the empty shells and the live individuals, we concluded that decapods specialize on large groups of small migratory juveniles, while birds specialize on the largest resident individuals. Worn shells were highly frequent in both empty shells and live individuals, and sizes did not differ between samples. A comparison by slow-flow and fast-flow habitats showed that predators do not discriminate shell sizes between environments. However, the frequency of damage by birds and decapods was greater under slow-flow conditions. Despite of the little contribution of predation to the population dynamics in this speci
EXPORTACIóN DE SEDIMENTOS DESDE CUENCAS HIDROGRáFICAS DE LA VERTIENTE ORIENTAL DEL GOLFO DE URABá: INFLUENCIAS CLIMáTICAS Y ANTRóPICAS SEDIMENT EXPORTS FROM THE EASTERN BASIN IN THE GULF OF URABA: CLIMATIC AND ANTHROPOGENIC INFLUENCES
Andrea Arroyave-Rincón,Juan F. Blanco,Alexander Taborda
Revista Ingenierías Universidad de Medellín , 2012,
Abstract: En este artículo se analizaron series de tiempo mensuales de precipitación (mm), caudal (m3/s) y exportación de sedimentos (kton/día) en cuencas de la vertiente oriental del golfo de Urabá. Se analizó la dinámica de la exportación de sedimentos, la relación caudal-exportación y caudal-precipitación. Se infirió el papel de fenómenos atmosféricos estacionales y multianuales (El Ni o-Oscilación Sure a, ENOS), y factores antrópicos. Se encontraron variabilidades intra-anuales significativas (ANOVA: p<0.001) consistentes con las oscilaciones de la Zona de Convergencia Intertropical. Correlaciones de Pearson mostraron relaciones directas y significativas (p<0.001). El ENOS no presentó influencia sobre la precipitación. Con aerofotografías se analizó el efecto antrópico en los municipios de Apartadó (1961-2005) y Chigorodó (1961-2007), y se encontró pérdida de cobertura boscosa del 90%. Las figuras de doble masa reflejaron, al cambiar la pendiente positivamente, a mediados de los 90, que la tasa de exportación de sedimentos fue mayor por metro cúbico de caudal, sugiriendo que hay un efecto antrópico. This article reports on a time-series analysis of monthly precipitation (mm), river discharge (m3/s) and sediment export (kton/day) in Urabá Gulf. We analyzed the dynamics of sediment exports relative to river discharge, and the dynamics of this latter variable relative to precipitation. We inferred the role of seasonal and multi-annual atmospheric drivers, and anthropogenic factors. We found significant intra-annual variability (ANOVA: p<0.001) consistent with the movement of the Inter-Tropical Convergence Zone. The Pearson correlation between variables showed direct and significant relationships (p<0.001). The ENSO did not influence precipitation. Using aerial-photographs, we analyzed anthropogenic factors in the municipalities of Apartadó (1961-2005) and Chigorodó (1961-2007), finding up to a 90% forest-cover loss. Using double-mass graphs, it was observed an increase in slope steepness (during mid 90’s), consistent with an increase in sediment export rate relative to discharge, thus suggesting that there was a significant effect of human factors, such as deforestation.
Medición económica del deporte en Colombia: una propuesta metodológica de cuenta satélite
Andrea Ruiz Molina,Elkin Argiro Mu?oz Arroyave,Ramón Javier Mesa Callejas
Lecturas de Economía , 2010,
Abstract: Sports economics has acquired relevance among scholars and as a field because of the salience of sports as an economic sector. Parting from this idea and a lack of studies measuring the value of sports in the Colombian economy, this paper proposes a Satellite Accounts methodology for valuing sports in Colombia. Hence, the main contribution of this study is a theoretical design of an accounting system based on the Nationals Accounts System of the United Nations. Also, following a circular flow of income and product approach, this framework depicts the main economic activities related to sports in Colombia.
Diagnóstico actual de los parámetros fisicoquímicos como indicadores de contaminación ambiental en el río Apulo, Cundinamarca-Colombia
Rincón Galán,Yuliet Andrea; Daza Ardila,Diana Del Socorro; Castrillón Cardona,William Fernando;
Tecnura , 2011,
Abstract: the apulo river constitutes an affluent of the bogota river, on him settled down six stations of sampling and in each of them a sampling for the study of physico-chemical parameters was realised, in situ and of laboratory. the taking of the data was realised during four months realised every thirty days, which were analyzed in laboratory and from them, values of each variable were obtained, with which the indices of contamination were determined caused by: mineralization icomi, suspended solids icosus, trofismo icotro, index of langelier lsi and index of saprobiedad, from this, comparisons between the stations of sampling in terms of contamination contamination settled down, as well as their possible reasons inferred from an analysis of statistical correlation between the obtained results. considering the results of each variable and the indices of contamination the anthropic action in the river basin of the apulo river is evaluated, which is demonstrated in the quantification of its physico-chemical parameters it classifies and it like a eutrofico system. it is possible to be deduced, that the water body is put under certain unloading of contamination that becomes more evident in than other stations and that also, presents attempts of autorecuperacion that are interrupted by the constant ecosistemico imbalance caused by the anthropic disturbances on the river.
A Systematic Bibliographical Review: Barriers and Facilitators for Access to Legal Abortion in Low and Middle Income Countries  [PDF]
Freddy Andrés Barrios Arroyave, Paula Andrea Moreno Gutiérrez
Open Journal of Preventive Medicine (OJPM) , 2018, DOI: 10.4236/ojpm.2018.85015
Abstract: Background: There is a complex interplay between women’s preferences, abortion services availability and the context in which these are provided. Even in countries where it is legal, denial of abortion is common, especially in low and middle income countries, forcing women to look for the service elsewhere and bringing serious consequences to the health and wellbeing of many women and their families. This non-systematic review pretends to answer the question: Which are the barriers to and facilitators for the access to legal abortion services in low and middle income countries? Methods: A non-systematic bibliographical review. Inclusion criteria: all quantitative, qualitative and evidence synthesis studies performed in low and middle income countries according to the World Bank classification for 2015 and published in English, Spanish and Portuguese language, between 2005 and 2017. Exclusion criteria: articles evaluating the efficacy of interventions, addressing the knowledge about abortion procedures among health care students and personnel, as well as those that only included sex workers. Results: The database search yield 199 articles in MEDLINE. 24 in Scopus and 38 in Scielo. A total of 22 articles including 15 countries from Africa (n = 6), Asia (n = 5), Central and South America (n = 3) and Europe (n = 1). The legal status of abortion in each of these countries was studied and described. For the analysis of the information, three categories of deepening were established: Laws and policies, Service delivery and Women’s abortion care-seeking behavior. Conclusion: the determinants of access to abortion in low and middle income countries are convoluted as multiple delays and barriers usually overlap. Similarly, stigmatization has a great impact across all the steps of abortion provision. Multiple facilitators were proposed in the three aspects of abortion provision, but they need to be adjusted depending on the context of each country.
ESTRATEGIAS METODOLóGICAS PARA EL ANáLISIS DE DATOS TEXTUALES: APLICACIONES EN PSICOLOGíA DEL CONSUMIDOR
Barreto,Idaly; Velandia-Morales,Andrea; Rincón-Vásquez,Juan Carlos;
Suma Psicológica , 2011,
Abstract: this paper presents a classification methodology for studies of textual data. this classification is based on the two predominant methodologies for social science research: qualitative and quantitative. the basic assumption is that the research process involves three main features: 1) structure research, 2) collection of information and, 3) analysis and interpretation of data. in each, there are general guidelines for textual studies.
ESTUDIO DE EFECTIVIDAD PARA EL DRENAJE Y DESCOMPRESIóN ENTéRICA DE CUATRO DIFERENTES DISE?OS DE SONDAS INTRALUMINALES
TRóCHEZ R.,ANDREA; RINCóN L.,LUIS CARLOS; ORTíZ,RAFAEL;
Revista Med , 2009,
Abstract: multiple surgical pediatric intestinal diseases are a real challenge for the medical team, because they compromise seriously the intestines limiting the treatment options and with it the survival options. for that reason the creativity of the surgeon in the surgical field is the resource to find an alternative that give us hope. it is like this how enteric drain stents were designed, modifying existing elements, as a solution to protect the compromised gut, help its recovery, drain its contents and stop its isquemic deterioration. additionally they limit the formation of obstructive adhesions and the need for wide resections. the present work intends to raise its use and find common elements for the design of an ideal catheter, with optimal biophysical qualities related to the diseases to treat. with these objectives we did a hydraulic simulation of the most used drains which may serve as an excellent starting point in the design of a new product. the conclusion is that the ideal stent is not yet developed and more research like this is necessary for an optimal result, using the main characteristics of actual drains: smooth surface of pvc, softness of the silicon and the technology of the blake's? drain in the search for a for larger surface for maximum drainage.
METHODOLOGICAL STRATEGIES FOR TEXTUAL DATA ANALYSIS:
Idaly Barreto,Andrea Velandia-Morales,Juan Carlos Rincón-Vásquez
Suma Psicológica , 2011,
Abstract: This paper presents a classification methodology for studies of textual data. Thisclassification is based on the two predominant methodologies for social scienceresearch: qualitative and quantitative. The basic assumption is that the researchprocess involves three main features: 1) Structure Research, 2) Collection of informationand, 3) Analysis and Interpretation of Data. In each, there are generalguidelines for textual studies.
Planteamiento y evaluación de las aplicaciones de los productos obtenidos en la hidrólisis alcalina de las virutas de cromo generadas durante el procesamiento del cuero Proposing and evaluating applications for products obtained during chromium chip alkaline hydrolysis produced during leather tanning
Díaz Andrea,Jiménez Juliana,Pérez Monica,Narváez Rincón Paulo César
Ingeniería e Investigación , 2006,
Abstract: Considerando el concepto de maximizar la reutilización de residuos sólidos de curtiembres en diversos usos industriales y la minimización del impacto ambiental que estos generan, se evalúan algunas aplicaciones de los subproductos obtenidos por la hidrólisis alcalina de las “virutas de cromo”5 generadas durante la etapa de rebalado en el procesamiento del cuero. El hidróxido de cromo obtenido transformado en sulfato de cromo mo- nobasico puede reutilizarse en el procesamiento del cuero como sal curtiente. Al comparar su capacidad curtiente con el sulfato de cromo comercial, se determinó que puede emplearse en mezclas con esta sal, remplazándola hasta en un 40%, y con una basicidad del 33%. Para el hidrolizado de colágeno se evaluó la disminución del contenido de cromo por medio de variación del pH en el proceso de hidrólisis alcalina de las virutas, y el uso de materiales adsorbentes como bentonita, biomasa de alfalfa y sorgo, carbón activado, entre otros, obteniendo un porcentaje máximo de remoción de cromo del 55% al emplear los dos primeros adsorbentes. Some applications for products obtained by chromium chip alkaline hydrolysis produced during leather tanning were evaluated in this work, considering the concept of maximising tanneries’ solid residue reuse for different industrial applications and minimising the environmental impact so produced. When Cr(OH) is transformed into Cr (OH)(SO ) it can be used in tanning leather (i.e. as tanning salt). When compared to commercial salts, 2 4 it was determined that it could be applied to mixtures containing this salt, replacing it by up to 40%. Chromium content reduction was evaluated for collagen hydrolyzate by pH control after alkaline hydrolysis of the chips and by applying adsorbent materials such as bentonite, alfalfa and sorghum biomass and activated charcoal, a maximum 55% Cr removal being obtained when the first two adsorbent materials were used.
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