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Imagen de apoyo de  Effect of temperature and precipitation on abundance of four bird species and their future perspectives regarding climate change, in the Tibabuyes wetland (Bogotá, Colombia) = Efecto de la temperatura y la precipitación en la abundancia de cuatro especies de aves y sus perspectivas futuras relacionadas con el cambio climático, en el humedal Tibabuyes (Bogotá, Colombia)

Effect of temperature and precipitation on abundance of four bird species and their future perspectives regarding climate change, in the Tibabuyes wetland (Bogotá, Colombia) = Efecto de la temperatura y la precipitación en la abundancia de cuatro especies de aves y sus perspectivas futuras relacionadas con el cambio climático, en el humedal Tibabuyes (Bogotá, Colombia)

Por: Samanta Corredor Velandia | Fecha: 2018

Urban wetlands of Bogotá provide important environmental services such as flood containment, regulation of the water cycle, climate regulation. They are also a source of biodiversity and endemism. The climate change reflected in the increase in the average environmental temperature and in alterations in the precipitation patterns has shown to have effects on wildlife. This dissertation takes as a case study the Tibabuyes wetland, the largest one in Bogotá. Using Mann-Kendall non-parametric tests, Spearman correlations and qualitative information, analyses were conducted to determine the possible effect of temperature and precipitation variation on the abundance of four species of birds for ten years (2007-2016). Three of these species are endemic to Colombia. It was found that the annual average temperature and total annual precipitation in the surroundings of the wetland increased in the last 44 years (1972-2016). For the birds, it was found that Rallus semiplumbeus, Fulica americana columbiana and Vanellus chilensis showed an increase in their populations, however this growth was not statistically related to the climatic variables. Cistothorus apolinari did not show any trend. Changes in the climate have generated modifications in the composition of the aquatic and semi-aquatic vegetation and in the flooded areas, which have been exacerbated by anthropogenic stressors. Future projections for Bogotá consider a high increase in the environmental temperature and a low increase in precipitation, it is estimated that this panorama will affect differentially these species, being more vulnerable to environmental changes those endemic with low population in the wetland. The maintenance in the wetland by environmental entities seems to have a positive effect on the bird abundance, therefore, it is essential to ensure this continuous work and prioritizing the habitat zones of these species. Los humedales urbanos de Bogotá proporcionan importantes servicios ambientales como la contención de inundaciones, la regulación del ciclo del agua y la regulación del clima. También son una fuente de biodiversidad y endemismo. Se ha demostrado que el cambio climático reflejado en el aumento de la temperatura media del medio ambiente y en las alteraciones de los patrones de precipitación tiene efectos en la vida silvestre. Esta disertación toma como estudio de caso el humedal de Tibabuyes, el más grande de Bogotá. Utilizando pruebas no paramétricas de Mann-Kendall, correlaciones de Spearman e información cualitativa, se realizaron análisis para determinar el posible efecto de la variación de la temperatura y las precipitaciones en la abundancia de cuatro especies de aves durante diez años (2007-2016). Tres de estas especies son endémicas de Colombia. Se comprobó que la temperatura media anual y la precipitación total anual en los alrededores del humedal aumentaron en los últimos 44 años (1972-2016). En el caso de las aves, se encontró que Rallus semiplumbeus, Fulica americana columbiana y Vanellus chilensis mostraron un aumento en sus poblaciones, sin embargo, este crecimiento no estuvo estadísticamente relacionado con las variables climáticas. Cistothorus apolinari no mostró ninguna tendencia. Los cambios en el clima han generado modificaciones en la composición de la vegetación acuática y semiacuática y en las zonas inundadas, que se han visto exacerbadas por los factores estresantes antropogénicos. Las proyecciones futuras para Bogotá consideran un alto incremento en la temperatura ambiental y un bajo incremento en la precipitación, se estima que este panorama afectará diferencialmente a estas especies, siendo más vulnerables a los cambios ambientales aquellas endémicas con baja población en el humedal. El mantenimiento en el humedal por parte de las entidades ambientales parece tener un efecto positivo en la abundancia de aves, por lo tanto, es fundamental asegurar este trabajo continuo y priorizar las zonas de hábitat de estas especies.
Fuente: Biblioteca Virtual Banco de la República Formatos de contenido: Tesis
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Effect of temperature and precipitation on abundance of four bird species and their future perspectives regarding climate change, in the Tibabuyes wetland (Bogotá, Colombia) = Efecto de la temperatura y la precipitación en la abundancia de cuatro especies de aves y sus perspectivas futuras relacionadas con el cambio climático, en el humedal Tibabuyes (Bogotá, Colombia)

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Imagen de apoyo de  Exploration of the UK ports industry and its potential adoption of drone-in-a-box technology = Exploración de la industria portuaria en Reino Unido y su potencial adopción de la tecnología drone-in-a-box

Exploration of the UK ports industry and its potential adoption of drone-in-a-box technology = Exploración de la industria portuaria en Reino Unido y su potencial adopción de la tecnología drone-in-a-box

Por: Ana Lucía Correa Díaz | Fecha: 2020

The commercial drones’ market has grown significantly in recent years given its different industries’ applications. Ports are evolving and moving towards Industry 4.0, creating an opportunity for technologies to improve their operations, one being drone-in-a-box technology; however, there is scant understanding of the port industry, its potential customers and the technology needs to be addressed. This study explores the UK port industry and its potential use of drone-in-a-box, to give recommendations to Herotech8 about how to grow in this market. A critical review of the literature was carried out and primary data collected from 14 interviewees, i.e. managers working at ports, people related to the drone industry and experts – with knowledge in drone technology and/or ports. Given the lack of awareness of drone-in-a-box technology, some information was gathered regarding conventional drone technology. Also, to contrast and complement the information, several interviews were conducted with Herotech8’s CEO. Results identified potential customers and their understanding of drone technology – applications, benefits, drawbacks and challenges. A value proposition emerged from these findings, but the impact level on each customer will depend on how their needs could be satisfied. Therefore, a general buying decision process was mapped to identify the crucial steps where needs can be recognised and assessed to deliver high value. The results indicated that although customers had not heard about drone-in-abox technology, they are interested; however, there is a fear of acquiring relatively new technologies and some would rather not be the early adopters. Recommendations were made, highlighting the steps to be taken by Herotech8, having identified the need to gain market share in the port sector, including attracting potential customers’ attention, establishing a process to identify their needs and sealing its first deal.
Fuente: Biblioteca Virtual Banco de la República Formatos de contenido: Tesis
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Exploration of the UK ports industry and its potential adoption of drone-in-a-box technology = Exploración de la industria portuaria en Reino Unido y su potencial adopción de la tecnología drone-in-a-box

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Imagen de apoyo de  The effect of political finance on corruption risk in Colombia: The unintended trade-offs of paying for democracy? = El efecto del financiamiento político en el riesgo de corrupción en Colombia: ¿Los sacrificios no intencionados de pagar por la democracia?

The effect of political finance on corruption risk in Colombia: The unintended trade-offs of paying for democracy? = El efecto del financiamiento político en el riesgo de corrupción en Colombia: ¿Los sacrificios no intencionados de pagar por la democracia?

Por: Juan Camilo Ceballos Oviedo | Fecha: 2020

Conventional wisdom holds that large sums of money poured into election campaigns are the gateway to corruption. Allegations of the corrupting influence of money in politics and policy are widespread on the national level. Yet, little empirical evidence has advanced the understanding of such a link on the local level, coupled with blurred corruption measures. This master’s thesis tests the effect of campaign finance on public procurement corruption risks in Colombian municipalities, focusing on donations, small donations, and financial disclosure. To that end, I seized publicly disclosed contribution-level data from the 2015 municipal elections and a novel index of institutionalized public procurement corruption risks based upon contract-level data from the near population of local governments. The analysis shows that donations are negatively associated with overall corruption risk, yet they affect specific corruption risks differently. By contrast, small donations seem to correlate positively with direct awarding for a sub-sample of medium-sized municipalities, whereas in their large-sized counterparts the effect of the former on institutionalized corruption is adverse. Finally, financial misreporting is positively linked with market competition restrictions and direct awarding. In the conclusion, I discuss the implications of these findings for future research and outline a series of policy recommendations. La sabiduría convencional sostiene que las grandes sumas de dinero invertidas en campañas electorales son la puerta de entrada de la corrupción. Las acusaciones sobre la influencia corrupta del dinero en la política y la política pública son contundentes a nivel nacional. Sin embargo, poca evidencia empírica ha avanzado el entendimiento de dicha relación en el nivel local, junto con difusas mediciones de corrupción. Esta tesis de maestría mide el efecto del financiamiento de campañas electorales en el riesgo de corrupción en la contratación pública en municipios colombianos, enfocándose en las donaciones, las pequeñas donaciones y el reporte de información financiera sobre las campañas. Para alcanzar tal fin, usé información pública sobre las contribuciones políticas durante las elecciones locales de 2015 y un novedoso índice de corrupción institucional en la contratación pública, basado en el análisis de procesos de compra del universo de alcaldías municipales en Colombia. Los resultados muestran que las donaciones se relacionan negativamente con el riesgo de corrupción en general, aunque afectan específicos riesgos de corrupción de manera diferente. Por otro lado, las pequeñas donaciones muestran una correlación positiva con la contratación directa en ciudades medias, mientras en ciudades grandes el efecto parece ser negativo. Finalmente, el subreporte de información se relaciona positivamente con riesgos como restricciones a la competencia y contratación directa. En la conclusión, discuto las implicaciones de dichos resultados para futuras investigaciones y señalo algunas recomendaciones de política pública.
Fuente: Biblioteca Virtual Banco de la República Formatos de contenido: Tesis
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The effect of political finance on corruption risk in Colombia: The unintended trade-offs of paying for democracy? = El efecto del financiamiento político en el riesgo de corrupción en Colombia: ¿Los sacrificios no intencionados de pagar por la democracia?

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Imagen de apoyo de  The Wolf in Sheep's Clothing: A Comparative Study of the Discourses of Laureano Gómez Castro and Álvaro Uribe Vélez = El lobo con piel de oveja: estudio comparativo de los discursos de Laureano Gómez Castro y Álvaro Uribe Vélez

The Wolf in Sheep's Clothing: A Comparative Study of the Discourses of Laureano Gómez Castro and Álvaro Uribe Vélez = El lobo con piel de oveja: estudio comparativo de los discursos de Laureano Gómez Castro y Álvaro Uribe Vélez

Por: Jonnathan Romero Huertas | Fecha: 2023

Abstract: This thesis analyzes how former Colombian Presidents Laureano Gómez Castro and Álvaro Uribe Vélez utilized their speeches to advance autocratic agendas under the guise of protecting democracy and pluralism. This research employed Discourse Analysis as proposed by Teun Van Dijk, aiming to detail symbolic violence through speeches that, although seemingly promoting democracy, concealed attacks on their opponents. It was discovered that both leaders, through their rhetoric and actions, persuaded the political space towards an exclusive regime, promoting a state that, under promises of inclusion and democracy, fostered exclusion and weakened democratic institutions. The results also suggest that while in power, the 3 former presidents moderated their speeches to include the opposition, a practice not observed while they were in opposition, where they were more visceral in their attacks. The analysis of the information was conducted on two levels. First, the concepts that appear most frequently in each one's speeches were recovered to explain their existence. Then, the information was classified according to the categories proposed by the researcher to understand how they used their speeches for two main purposes: first, to empathize with most of the population, and second, to create an internal enemy to attack. When referring to the former, they depict a plural country where everyone can participate, and when discussing the latter, which grouped the opponents of their mandate, their eradication was justified because they opposed the democratic regime. In creating their nemesis, both knew how to use the population's fears: communists, in the case of Gómez; and terrorists, in the case of Uribe. Resumen: La presente tesis analiza cómo los expresidentes de Colombia, Laureano Gómez Castro y Álvaro Uribe Vélez, utilizaron sus discursos para avanzar en agendas autocráticas bajo la apariencia de proteger la democracia y el pluralismo. Esta investigación usó el Análisis de Discurso como lo planteó Teun Van Dijk y buscó detallar la violencia simbólica, a través de discursos que, aunque parecían promover la democracia, escondían ataques a sus opositores. Se descubre que ambos líderes, a través de su retórica y sus acciones, persuadían el espacio político hacia un régimen excluyente, promoviendo un estado que, bajo promesas de inclusión y democracia, fomentaba la exclusión y debilitaba las instituciones democráticas. Los resultados también sugieren que mientras estuvieron en el poder, los expresidentes moderaron sus discursos para incluir a la oposición, lo que no ocurrió mientras estuvieron en la oposición, en la que fueron más viscerales en sus ataques. El análisis de la información se hizo en dos niveles. Primero, se recuperaron los conceptos que más aparecen en los discursos de cada uno para explicar la existencia de estos. Después, se clasificó la información de acuerdo con las categorías propuestas por el investigador para entender cómo utilizaron sus discursos con dos fines principales: primero, para empatizar con el grueso de la población, y segundo para crear un enemigo interno al que atacar. Cuando se refieren al primero, muestran un país plural en donde todos pueden participar, y cuando hablan del segundo, que agrupaba a los opositores de su mandato, se justificaba su erradicación porque se oponían al régimen democrático. En la creación de su némesis, ambos supieron usar los miedos de la población: los comunistas, en el caso de Gómez; y los terroristas, en el caso de Uribe.
Fuente: Biblioteca Virtual Banco de la República Formatos de contenido: Tesis
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The Wolf in Sheep's Clothing: A Comparative Study of the Discourses of Laureano Gómez Castro and Álvaro Uribe Vélez = El lobo con piel de oveja: estudio comparativo de los discursos de Laureano Gómez Castro y Álvaro Uribe Vélez

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Imagen de apoyo de  An In-depth Analysis of the Implementation Challenges of Colombia’s ‘Cátedra de Paz’ Peace Education Program

An In-depth Analysis of the Implementation Challenges of Colombia’s ‘Cátedra de Paz’ Peace Education Program

Por: María Fernanda García Sánchez | Fecha: 2023

Abstract: Peace education, pivotal in shaping national identities particularly in post-conflict settings, fosters mutual understanding, dialogue, and reconciliation. In Colombia, the 2016 Peace Agreement represented a major milestone in ending decades of violence, leading to the establishment of the ‘Cátedra de Paz’ in 2015. This initiative mandates its inclusion in the curricula of all educational institutions to instill peace values in youth and promote a culture of engagement among new generations. Despite the progress, this study identifies persistent challenges in program implementation, such as inadequate teacher training, excessive teacher workloads, and insufficient resources, alongside cultural barriers like resistance to change. Semi-structured interviews emphasize the necessity for significant restructuring and enhanced institutional support to effectively incorporate peace education into the national curriculum. Recommendations from participants include specialized teacher training, student-centered pedagogical approaches, rigorous program monitoring, and inclusive educational resources, particularly for marginalized communities. There is widespread agreement on the importance of equipping educators with the skills needed to handle sensitive topics and encourage critical thinking. Although challenges persist, participants concur that ‘Cátedra de Paz’ promotes dialogue and empathy, enabling students to contribute to more peaceful societies. Continued effort and comprehensive strategies involving all stakeholders, from educators to community members, are crucial for achieving post-conflict harmony and equity in Colombia.
Fuente: Biblioteca Virtual Banco de la República Formatos de contenido: Tesis
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An In-depth Analysis of the Implementation Challenges of Colombia’s ‘Cátedra de Paz’ Peace Education Program

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Imagen de apoyo de  Statistical Analysis for Business Angels around the globe = Análisis estadístico de los 'Business Angels' en el mundo

Statistical Analysis for Business Angels around the globe = Análisis estadístico de los 'Business Angels' en el mundo

Por: Ana María Camacho Gómez | Fecha: 2018

Abstract: According to Mason and Harrison, business angels are high net worth individuals, who invest their own money, with or without someone else support maintaining a completely unbiased position and no familial ties, these investments normally take the form of equity with the intent of an important return. The common approach is to support new or early-stage projects, which are normally the kind of projects a normal venture capitalist would not support due to high risks to liaison with this type of amateur entrepreneurs entails. The object of this thesis is compacted from their early beginnings to the year 2014, tries to portray the growth of business angels' business, what they did to become the number one option for entrepreneurs, what pushed them to become publicly known and how they managed to be different from venture capitalists. It shows how different entities, mostly the government, has supported them by creating networks and incentives, throughout the years, to helped them broaden their target. After this, is shown who is the regular business angel, what entails to be one. From, their background, their gender, the number of investments, experiences and others that have shaped them into what they are today. Resumen: Según Mason y Harrison, los business angels son individuos con un alto patrimonio neto, que invierten su propio dinero, con o sin el apoyo de alguien más, manteniendo una posición completamente imparcial y sin lazos familiares. Estas inversiones normalmente toman la forma de capital con la intención de obtener un retorno importante. El enfoque común es apoyar proyectos nuevos o en etapas tempranas, que normalmente son el tipo de proyectos que un capitalista de riesgo común no apoyaría debido a los altos riesgos que conlleva asociarse con este tipo de emprendedores aficionados. El objetivo de esta tesis, que abarca desde sus inicios hasta el año 2014, es retratar el crecimiento del negocio de los business angels, lo que hicieron para convertirse en la opción número uno para los emprendedores, qué los impulsó a hacerse conocidos públicamente y cómo lograron diferenciarse de los capitalistas de riesgo. Se muestra cómo diferentes entidades, principalmente el gobierno, los han apoyado creando redes e incentivos a lo largo de los años, ayudándoles a ampliar su objetivo. Después de esto, se presenta quién es el business angel regular, qué implica ser uno. Desde su formación, su género, el número de inversiones, experiencias y otros factores que los han moldeado en lo que son hoy.
Fuente: Biblioteca Virtual Banco de la República Formatos de contenido: Tesis
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Statistical Analysis for Business Angels around the globe = Análisis estadístico de los 'Business Angels' en el mundo

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Imagen de apoyo de  Bonds and Loans: Study of the Funding Decision for Colombia's  private sector - Bonos y Préstamos: Estudio sobre la Decisión de Financiamiento para el Sector Privado en Colombia

Bonds and Loans: Study of the Funding Decision for Colombia's private sector - Bonos y Préstamos: Estudio sobre la Decisión de Financiamiento para el Sector Privado en Colombia

Por: Luis Felipe Baron Buitrago | Fecha: 2010

Abstract: This study examines the financing choices made by Colombia's private sector, with a special emphasis on bonds and loans. It points out the critical role that a strong financial sector plays in promoting economic progress, a point that academics around the world have stressed. International data highlights the significance of creating financial institutions to draw investment and promote the expansion of the private sector. Despite its potential, Colombia's capital market has encountered difficulties such as strict rules, corruption, and security concerns. The financial industry has been strengthened by recent regulatory changes, which have made it possible to examine how Colombia's private debt market has changed over the previous five years. Analysis is done on the variables that affect funding decisions, such as the size of the organization, the risk profile, and the regulatory landscape. Market activity is investigated, with an emphasis on global and Colombian debt market habits. Private bond issuance has increased globally, headed by Europe and the US. In Colombia, despite previous obstacles, the bond market has showed tremendous development, driven by regulatory improvements and increased demand from institutional investors. The Colombian bond market has experienced significant changes in the last five years. Evidence suggests that private sector enterprises are now using bond emissions rather than the loan market to finance their operations. To understand the elements impacting this decision-making process, a study was done utilizing data from the most active corporations in the bond market between 2005 and 2010. Employing a Tobit Model estimation, variables such as corporate assets, profits, debt amount, Analysis results suggest that in the Colombian context, the development of the bond market reflects a growing dependence on and trust in the banking system. Larger companies with higher credit ratings tend to favor accessing the loan market over the bond market, potentially due to market characteristics. However, ongoing growth and evolution in the market are indicated, necessitating further investigation into the complex dynamics at play. The investigation highlights the growth of Colombia's corporate bond market, particularly in the real sector, driven by factors such as improved regulation and investor confidence. The increasing preference for corporate bonds over bank loans, attributed to lower costs and longer-term financing options, is noted. Sectors such as infrastructure and finance are identified as major contributors to bond issuance. The document encompasses a literature review focusing on the importance of capital markets, the ongoing dilemma between bond and loan funding, and the specific experience of the Colombian bond market. This contextual background provides a comprehensive understanding of the broader economic and financial landscape within which the study operates. Overall, the research suggests parallels between the growth of Colombia's corporate bond market and Chile's experience in the 1980s, indicating positive prospects for the private sector and the economy's future development.
Fuente: Biblioteca Virtual Banco de la República Formatos de contenido: Tesis
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  • Economía

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Bonds and Loans: Study of the Funding Decision for Colombia's private sector - Bonos y Préstamos: Estudio sobre la Decisión de Financiamiento para el Sector Privado en Colombia

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Imagen de apoyo de  Improving Master Data Management with a canonical model based on business ontology, Service Oriented Architecture and knowledge management

Improving Master Data Management with a canonical model based on business ontology, Service Oriented Architecture and knowledge management

Por: Didier Dueñas | Fecha: 2020

Abstract: This research attempted to develop guidelines for improving the use of the Master Data Management in developing various topics like business ontology, service-oriented architecture, canonical model and knowledge best practices. This research proposal also sought to examine innovative technological solutions that would allow project management offices to collaborate with companies focused on digital transformation, a set of differentiated skills, complementary assets, organizational routines, and capacities that provide the basis for a firm’s competitive capacities in one or more businesses. The major feature of this research is the service-oriented architecture on a Canonical model, whereas the business ontology and the knowledge best practices are studied but are not the central part of the research.
Fuente: Biblioteca Virtual Banco de la República Formatos de contenido: Tesis
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Improving Master Data Management with a canonical model based on business ontology, Service Oriented Architecture and knowledge management

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Imagen de apoyo de  New technologies as a competitive advantage in sustainable event management

New technologies as a competitive advantage in sustainable event management

Por: Felipe Camargo Vargas | Fecha: 2023

Abstract: Technology, events, and sustainability are three interconnected concepts that play a key role in influencing our society and business landscape. Technology has changed various aspects of our lives and the events industry is no exception. The advent of advanced digital tools and platforms has transformed the way events are organized, conducted, and experienced. Events such as festivals, conferences and celebrations traditionally pose significant environmental problems due to their resource-intensive nature. The mass gatherings of people combined with excessive energy consumption, waste generation and greenhouse gas emissions have contributed to the global climate crisis. Faced with this problem, sustainability has become a key factor in event management. Sustainable development in the context of events refers to the adoption of practices that minimize negative environmental, social, and economic impacts. It encompasses a range of strategies including resource efficiency, waste reduction, carbon neutrality and promoting social responsibility. Incorporating sustainability principles into event management helps to take environmental concerns into account and aligns with the growing demand for responsible and ethical practices from consumers and stakeholders. The importance of this research lies in its potential to provide valued insights into how technology can be used to increase sustainability in the events industry. This study examines the intersection of these three concepts and aims to contribute to the development of innovative approaches and best practices for organizing green events. Additionally, understanding the sustainability perspectives and expectations of event attendees will provide valuable guidance to industry leaders in meeting changing market demands. At a time when the climate crisis requires urgent action and when consumers are becoming increasingly aware of the impact of businesses and industries on the environment, it is important to seek innovative solutions that respond to these challenges.
Fuente: Biblioteca Virtual Banco de la República Formatos de contenido: Tesis
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New technologies as a competitive advantage in sustainable event management

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Imagen de apoyo de  Phytoextractor species and dolomitic lime as strategies to manage cd in cacao (theobroma cacao l.) and spinach (spinacia oleracea) = Especies fitoextractoras y cal dolomítica como estrategias para el manejo de cd en cacao (theobroma cacao l.) y espinaca (spinacia oleracea)

Phytoextractor species and dolomitic lime as strategies to manage cd in cacao (theobroma cacao l.) and spinach (spinacia oleracea) = Especies fitoextractoras y cal dolomítica como estrategias para el manejo de cd en cacao (theobroma cacao l.) y espinaca (spinacia oleracea)

Por: Jhony Armando Benavides Bolaños | Fecha: 2019

Abstract: European Commission Regulation (2006) and European Food Safety Authority (EFSA) (2012) legislation setting cadmium (Cd) human ingestion thresholds in food products is now affecting cacao bean (Theobroma cacao L.) production in Latin American countries via the rejection of food products exceeding maximum ingestion threshold levels. Cacao producers must be proactive and minimize Cd uptake by commodities and such strategies must be affordable for low income communities (or countries) where agricultural development is critical to stabilizing socio-political-economic systems. Two potential options for producers include: (a) the use of phytoextractor species, which can remediate some soil pollutants; and (b) metal immobilization via soil pH adjustment. We hypothesize that the use of a Cd phytoextractor species in an intercropping scheme, with the addition of dolomitic lime (to raise soil pH and decrease soil Cd availability), will decrease total Cd uptake in cacao and in spinach plants. The effectiveness of four phytoextractor species was evaluated: Helianthus annuus (sunflower), Brassica napus (oilseed rape), Chyrsopogon zizanioides (vetiver), and Heliconia psittacorum (heliconia). The efficacy of a combined phytoextraction and immobilization (per the use of dolomitic lime to raise soil pH) strategy was assessed. Resumen: El Reglamento de la Comisión Europea (2006) y la legislación de la Autoridad Europea de Seguridad Alimentaria (EFSA) (2012) que establecen umbrales de ingestión humana de cadmio (Cd) en productos alimenticios ahora están afectando la producción de granos de cacao (Theobroma cacao L.) en los países de América Latina a través del rechazo de alimentos. productos que superen los niveles umbrales máximos de ingestión. Los productores de cacao deben ser proactivos y minimizar la absorción de cadmio por parte de los productos básicos y dichas estrategias deben ser asequibles para las comunidades (o países) de bajos ingresos donde el desarrollo agrícola es fundamental para estabilizar los sistemas sociopolíticos y económicos. Dos opciones potenciales para los productores incluyen: (a) el uso de especies fitoextractoras, que pueden remediar algunos contaminantes del suelo; y (b) inmovilización de metales mediante el ajuste del pH del suelo. Nuestra hipótesis es que el uso de una especie fitoextractora de Cd en un esquema de cultivo asociado, con la adición de cal dolomítica (para elevar el pH del suelo y disminuir la disponibilidad de Cd en el suelo), disminuirá la absorción total de Cd en las plantas de cacao y espinaca. Se evaluó la efectividad de cuatro especies fitoextractoras: Helianthus annuus (girasol), Brassica napus (colza), Chyrsopogon zizanioides (vetiver) y Heliconia psittacorum (heliconia). Se evaluó la eficacia de una estrategia combinada de fitoextracción e inmovilización (mediante el uso de cal dolomítica para elevar el pH del suelo).
Fuente: Biblioteca Virtual Banco de la República Formatos de contenido: Tesis
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Phytoextractor species and dolomitic lime as strategies to manage cd in cacao (theobroma cacao l.) and spinach (spinacia oleracea) = Especies fitoextractoras y cal dolomítica como estrategias para el manejo de cd en cacao (theobroma cacao l.) y espinaca (spinacia oleracea)

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