Browsing Investigaciones by Title
Now showing items 128-147 of 390
-
Ecología
(BarranquillaLicenciatura en Ciencias SocialesSede Norte, 2018-06-01)Este texto está diseñado para su utilización en cursos, introductorios de Ecología General. El libro resume el análisis de contenido realizado por los autores a varios referentes bibliográficos de ecología, utilizados a ...
-
Economic and Exergo-Advance Analysis of aWaste Heat Recovery System Based on Regenerative Organic Rankine Cycle under Organic Fluids with Low GlobalWarming Potential
(BarranquillaIngeniería MecánicaSede Norte, 2020-03-12)The waste heat recovery system (WHRS) is a good alternative to provide a solution to the waste energy emanated in the exhaust gases of the internal combustion engine (ICE). Therefore, it is useful to carry out research ...
-
Ecopathogenic complexes of American trypanosomiasis in endemic areas of Venezuela: Diagnosis and variability of Trypanosoma cruzi
(BarranquillaBiologíaSede Norte, 2019-08-21)Background & objectives: Trypanosoma cruzi, the causative agent of American trypanosomiasis, has been reported in 180 mammalian species and 154 triatomines species of Neotropic. This is a clonal parasite with variable ...
-
Efectos oscilatorios de tipo óptico en la conductividad terahercios del grafeno
(BarranquillaSede Norte, 2018-06-01)En años recientes, después que fue posible separar la capa de grafeno de una estructura grafítica, un gran número de trabajos ha sido dedicado a estudiar este sistema debido a las propiedades no peculiares encontradas en ...
-
Effect of Addition of Polyurea as an Aggregate in Mortars: Analysis of Microstructure and Strength
(BarranquillaLicenciatura en Ciencias NaturalesSede Norte, 2022-04-26)The addition of polymers in construction is a new tendency and an important step toward the production of structures with better functional properties. This work investigates the addition of polyurea (PU) as a polymeric ...
-
Effect of Diesel Oil and Mixture of Alcohol-Glycol Ether on Colombian Ultrafine Coal Cleaning Using a Test-Rig Closed-Loop Flotation Column
(BarranquillaIngeniería MecánicaSede Norte, 2021-07-19)A test-rig closed-loop flotation column was used to observe the effect of diesel oil (collector) and Flomin F-425 (frother) on mass yield and ash content for two Colombian coals: Caypa (northern zone) and Guachinte ...
-
Effect of Pretreatment with Low-Frequency Ultrasound on Quality Parameters in Gulupa (Passiflora edulis Sims) Pulp
(BarranquillaIngeniería QuímicaSede Norte, 2021-02-16)The Gulupa (Passiflora edulis f. edulis Sims) is an expression of South America’s tropics’ biodiversity, and a source of B vitamins and amino acids. It is a climacteric export fruit for which it is necessary to incorporate ...
-
Effect of the Gallium and Vanadium on the Dibenzothiophene Hydrodesulfurization and Naphthalene Hydrogenation Activities Using Sulfided NiMo-V2O5/Al2O3-Ga2O3
(BarranquillaQuímicaSede Norte, 2020-08-07)The effect of Ga and V as support-modifier and promoter of NiMoV/Al2O3-Ga2O3 catalyst on hydrogenation (HYD) and hydrodesulfurization (HDS) activities was studied. The catalysts were characterized by elemental analysis, ...
-
Effect of the Geometric Profile of Top Ring on the Tribological Characteristics of a Low-Displacement Diesel Engine
(BarranquillaIngeniería MecánicaSede Norte, 2020-08-11)The present study aims to analyze the influence of the geometric profile of the compression ring on the tribological properties of the lubricant. Additionally, the influence of the rotation speed and the engine load on ...
-
Effect of Thermal Cycling on Abrasive Wear Response of Cu-1.9Be-0.25(Co+Ni) Alloy
(BarranquillaSede Norte, 2020-08-24)Cu-Be alloys are considered high strength alloys when containing 0.2% to 2% of Be per weight, 0.2% to 2.7% of Co per weight, and up to 2.2% of Ni per weight, since they can present an elastic limit higher than 1380 MPa ...
-
Effects of agitation rate and dissolved oxygen on xylose reductase activity during xylitol production at bioreactor scale
(BarranquillaLicenciatura en Ciencias NaturalesSede Norte, 2022-01-05)The study of xylose reductase (XR) - one of the key enzymes in the production of xylitol - is important in the fermentation process to have maximum efficiency in the bioconversion of xylose to xylitol in lignocellulosic ...
-
Effects of Different Concentrations of Arsine on the Synthesis and Final Properties of Polypropylene
(BarranquillaQuímicaSede Norte, 2022-07-31)This article studies the effects of arsine on the synthesis and thermal degradation of 4 samples of virgin polypropylene (PP-virgin) and proposes reaction mechanisms that allow understanding of its behaviour. Different ...
-
Effects of Environmental Conditions on Photovoltaic Generation System Performance with Polycrystalline Panels
(BarranquillaSede Norte, 2021-10-31)Photovoltaic solar energy is the third most widely used renewable source worldwide, after hydroelectric and wind energy, and this energy source requires experimental and theoretical development in specific topics such as ...
-
Effects of shoulder geometry of tool on microstructure and mechanical properties of friction stir welded joints of AA1100 aluminum alloy1
(BarranquillaIngeniería MecánicaSede Norte, 2018-11-04)In this work were studied the effects of shoulder geometry of tool on microstructure evolution and mechanical properties of friction stir welded joints of AA1100 aluminum alloy using a milling machine. Three designs of ...
-
Eficiencia de la difracción de un sistema de modulación acusto-óptico de doble paso
(BarranquillaSede Norte, 2021-01-18)Se describe la caracterización de un sistema de modulación acusto-óptico y la optimización del set up para mejorar la eficiencia de la difracción en configuraciones de paso simple y doble. En la configuración de paso ...
-
Elaphidiini (Coleoptera, Cerambycidae) from the Caribbean region of Colombia: New species, taxonomic notes and new geographical records
(BarranquillaBiologíaSede Norte, 2020-03-04)Two new species of Elaphidiini from Colombia are described: Sphaerion costae sp. nov., and Mephritus costae sp. nov. The keys to species of Sphaerion Audinet-Serville, 1834 and Mephritus Pascoe, 1866 are translated and ...
-
Elementos estructurales de la contratación internacional y nacional en el transporte
(BarranquillaSede Norte, 2018-06-01)El advenimiento de la apertura económica y la globalización de la economía abren las puertas a un mercado global, cambiante y cada vez más exigente, pero que a su vez dependiera de los sistemas de transporte como herramienta ...
-
Emerging contaminants as global environmental hazards. A bibliometric analysis
(BarranquillaSede Norte, 2020-05-18)This paper presents a bibliometric analysis of peer-reviewed scientific literature on emerging contaminants published from 2000 through 2019. A total of 4968 documents (among research articles and review papers) collected ...
-
Energy, Economic, and Environmental Evaluation of a Proposed Solar-Wind Power On-grid System Using HOMER Pro®: A Case Study in Colombia
(BarranquillaSede Norte, 2020-04-02)The electrical sector in the Caribbean region of Colombia is currently facing problems that a ect its reliability. Many thermo-electric plants are required to fill the gap and ensure energy supply. This paper thus proposes ...
-
Enhanced Tetracycline Removal from Highly Concentrated Aqueous Media by Lipid-Free Chlorella sp. Biomass
(BarranquillaIngeniería IndustrialSede Norte, 2022-04-14)Microalgae are used as a lipid source for different applications, such as cosmetics and biofuel. The nonliving biomass and the byproduct from the lipid extraction procedure can efficiently remove antibiotics. This work has ...
Tecnología DSpace implementada por 