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Mostrando ítems 1-20 de 390
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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 ...
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Preparation of chitosan/poly(Vinyl alcohol) nanocomposite films incorporated with oxidized carbon nano-onions (multi-layer fullerenes) for tissue-engineering applications
(BarranquillaSede Norte, 2019-11-01)Recently, tissue engineering became a very important medical alternative in patients who need to regenerate damaged or lost tissues through the use of scaffolds that support cell adhesion and proliferation. Carbon ...
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Thermoeconomic modelling and parametric study of a simple orc for the recovery ofwaste heat in a 2 MW gas engine under differentworking fluids
(BarranquillaIngeniería MecánicaSede Norte, 2019-10-25)This paper presents a thermo-economic analysis of a simple organic Rankine cycle (SORC) as a waste heat recovery (WHR) systems of a 2 MW stationary gas engine evaluating different working fluids. Initially, a systematic ...
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Evaluation of the energy recovery potential of thermoelectric generators in diesel engines
(BarranquillaIngeniería MecánicaSede Norte, 2019-09-12)Thermoelectric generation is an alternative to recover some of the wasted energy trough an exhaust of the internal combustion engines. This paper assesses the performance of a thermoelectric generator with 20 modules by ...
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Deep underground neutrino experiment (DUNE) near detector conceptual design report
(BarranquillaSede Norte, 2021-03-26)The Deep Underground Neutrino Experiment (DUNE) is an international, world-class experiment aimed at exploring fundamental questions about the universe that are at the forefront of astrophysics and particle physics research. ...
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The Antiviral and Virucidal Activities of Voacangine and Structural Analogs Extracted from Tabernaemontana cymosa Depend on the Dengue Virus Strain
(BarranquillaMaestría en Gestión FarmacéuticaSede Norte, 2021-06-23)Currently, no specific licensed antiviral exists for treating the illness caused by dengue virus (DENV). Therefore, the search for compounds of natural origin with antiviral activity is an important area of research. In ...
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Diseño de estructuras con alambres en artesanías de Usiacurí
(BarranquillaLicenciatura en MatemáticasSede Norte, 2021-02-09)El problema de investigación surge del interés por los conocimientos matemáticos presentes en la práctica artesanal del municipio de Usiacurí - Atlántico, Colombia, específicamente, en el diseño de estructuras con alambres. ...
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In Silico Repositioning of Dopamine Modulators with Possible Application to Schizophrenia: Pharmacophore Mapping, Molecular Docking and Molecular Dynamics Analysis
(BarranquillaQuímicaSede Norte, 2021-03-30)We have performed theoretical calculations with 70 drugs that have been considered in 231 clinical trials as possible candidates to repurpose drugs for schizophrenia based on their interactions with the dopaminergic system. ...
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Zn(II)-tetracarboxy-phthalocyanine-Sensitized TiO2 Thin Films as Antimicrobial Agents under Visible Irradiation: a Combined DFT and Experimental Study
(BarranquillaQuímicaSede Norte, 2021-05-20)In this article, we studied the antimicrobial activity of TiO2 sensitized by the Zn(II)-tetracarboxy-phthalocyanine (TcPcZn) complex using TiO2-Degussa P25 as a semiconductor source. The TiO2 thin films were deposited by ...
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Actividad anticoagulante in vitro del extracto etanólico de las hojas de dos especies de la familia Euphorbiaceae
(BarranquillaQuímicaSede Norte, 2021-12-06)Las enfermedades cardiovasculares (ECV) son un conjunto de trastornos del corazón y de los vasos sanguíneos, que constituyen la principal causa de mortalidad en el mundo. En la búsqueda de alternativas para esta problemática, ...
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Estudios sobre educación intercultural en Colombia: tendencias y perspectivas
(BarranquillaSede Norte, 2009-07-10)En este artículo la autora da cuanta de las tendencias y perspectivas de los estudios sobre educación intercultural que se han realizado en el país en los últimos años. Para lo cual hace un recorrido por los diversas ...
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Activated carbon from cassava peel: a promising electrode material for supercapacitors
(BarranquillaIngeniería QuímicaSede Norte, 2019-08-10)Supercapacitors are conventional devices in electrical circuits that produce electrical pulses at high power levels in short periods. Electrodes for supercapacitors were prepared with activated carbon. Activated carbon was ...
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Combustion and Performance Evaluation of a Spark Ignition Engine Operating with Acetone–Butanol–Ethanol and Hydroxy
(BarranquillaFísicaSede Norte, 2021-06-07)Alternative fuels for internal combustion engines (ICE) emerge as a promising solution for a more sustainable operation. This work assesses combustion and performance of the dual-fuel operation in the spark ignition (SI) ...
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Sea anemones (Cnidaria, Anthozoa, Actiniaria) in high sedimentation environments influenced by the Magdalena River (Colombian Caribbean)
(BarranquillaBiologíaSede Norte, 2022-05-23)Fifteen species of sea anemones (Cnidaria, Actiniaria) have been recorded so far in the Colombian Caribbean, comprising approximately 28% of the total number of known species in the Caribbean Sea. Most species recorded are ...
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Cacao pod husk flour as an ingredient for reformulating frankfurters: Effects on quality properties
(BarranquillaEspecialización Tecnológica en Calidad de la Producción de AlimentosSede Norte, 2021-05-30)The cocoa pod husk is considered a source of dietary fiber with a high content of watersoluble pectins, bioactive compounds which should be viewed as a by-product with the potential to be incorporated into food. This study ...
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Optimization of mechanical and setting properties in acrylic bone cements added with graphene oxide
(BarranquillaIngeniería QuímicaSede Norte, 2021-06-03)The extended use of acrylic bone cements (ABC) in orthopedics presents some disadvantages related to the generation of high temperatures during methyl methacrylate polymerization, thermal tissue necrosis, and low mechanical ...
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The role of heterogenous environmental conditions in shaping the spatiotemporal distribution of competing Aedes mosquitoes in Panama: implications for the landscape of arboviral disease transmission
(BarranquillaBiologíaSede Norte, 2021-03-01)Monitoring the invasion process of the Asian tiger mosquito Aedes albopictus and its interaction with the contender Aedes aegypti, is critical to prevent and control the arthropod-borne viruses (i.e., Arboviruses) they ...
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Clientelismo personalizado en Colombia: una aproximación histórico-institucional a un estudio de caso
(BarranquillaLicenciatura en Ciencias SocialesSede Norte, 2021-05-17)Gran parte de la literatura politológica considera que el clientelismo es dañino para las democracias. En menor medida, otras aproximaciones estiman que el clientelismo es un mecanismo de atención de demandas para poblaciones ...
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Supernova neutrino burst detection with the Deep Underground Neutrino Experiment
(BarranquillaFísicaSede Norte, 2021-05-15)The Deep Underground Neutrino Experiment (DUNE), a 40-kton underground liquid argon time projection chamber experiment, will be sensitive to the electronneutrino flavor component of the burst of neutrinos expected from ...
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Predicting the Adsorption of Amoxicillin and Ibuprofen on Chitosan and Graphene Oxide Materials: A Density Functional Theory Study
(BarranquillaQuímicaSede Norte, 2021-05-13)The occurrence, persistence, and accumulation of antibiotics and non-steroidal antiinflammatory drugs (NSAIDs) represent a new environmental problem due to their harmful effects on human and aquatic life. A suitable absorbent ...
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