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Mostrando ítems 81-100 de 390
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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 ...
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Methylene Blue Photodegradation under Visible Irradiation on Ag-Doped ZnO Thin Films
(BarranquillaSede Norte, 2019-09-04)This study synthesized and characterized Ag-doped ZnO thin films. Doped ZnO powders were synthesized using the sol-gel method, and thin films were fabricated using the doctor blade technique. The Ag content was determined ...
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El acorde que muere cuando nace. Alteridad y ética del cuerpo sin órganos en la improvisación de jazz
(BarranquillaSede Norte, 2019-09-06)Nos adentramos en esos procesos de subjetivación en los que el músico de jazz experimenta en sí otras formas de corporalidad, que se dirimen entre sujeción a esquemas (Bourdieu) y ruptura de los corsés por una teatralidad ...
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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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PRIMERA APROXIMACIÓN A LA FAUNA FLEBOTOMÍNEA (PSYCHODIDAE: PHLEBOTOMINAE) DEL DEPARTAMENTO DE ATLÁNTICO
(BarranquillaSede Norte, 2019-09-26)Dentro del género Lutzomyia algunas especies son vectores de la enfermedad llamada leishmaniasis, la cual tiene implicaciones en la salud pública, desarrollando diferentes manifestaciones clínicas como leishmaniasis ...
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Vulnerability of Special Agreements Signed by NonState Armed Groups in Non-International Conflicts*
(BarranquillaSede Norte, 2019-10-03)International law has recognized the existence and legal force of special agreements signed by non-state armed groups —NSAG — in the context of non-international armed conflicts -NIAC-. Nevertheless, considering the poor ...
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Multiple Linear Regression Model Applied to the Projection of Electricity Demand in Colombia
(BarranquillaSede Norte, 2019-10-10)The exigencies as soon as to competitiveness and productivity have influenced in the energetic consumption and the demand of electrical energy in Colombia, reason why at the present time it is of much interest and utility ...
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Respuesta de los escarabajos coprófagos (Scarabaeidae: Scarabaeinae) a la modificación del hábitat causada por un incendio forestal en la Reserva Bijibana, Atlántico-Colombia
(BarranquillaBiologíaSede Norte, 2019-10-16)El fuego como herramienta de preparación del suelo para actividades agropecuarias es una práctica comúnmente usada por los campesinos. Sin embargo, ésta puede causar incendios forestales de grandes repercusiones sobre la ...
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Removal of the direct navy-blue dye on modified coffee bean
(BarranquillaSede Norte, 2019-10-19)The presence of dyes in water bodies inhibits the penetration of light, affecting the flora and fauna of these ecosystems, which is why, greater efforts are made to eliminate them before being poured. This study allowed ...
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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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Physical-chemical study of anthracene selective oxidation by a Fe(III)-phenylporhyrin derivative
(BarranquillaSede Norte, 2019-10-30)In this work, we studied the anthracene oxidation by hydroxyl radicals. Hydroxyl radical was generated by reaction of 5,10,15,20-tetrakis(4-carboxyphenyl)porphyrin Fe (III) (TPPFe) with hydrogen peroxide under visible ...
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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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A COMPREHENSIVE ANALYSIS OF CRITICAL VARIABLES USED TO DESIGN A SPRAY DRYER OF WHEY PROTEIN CONCENTRATES
(BarranquillaIngeniería QuímicaSede Norte, 2019-11-12)Five models of a spray dryer design for a whey protein process were analyzed in this study. These models include first principle approaches and empirical correlations. From a large set of given design specifications ...
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Evaluation of the Corrosion Resistance of AISI 316l Steel Subjected to Severe Deformation Using the Groove Pressing Technique
(BarranquillaSede Norte, 2019-11-25)In this investigation, samples of AISI 316L steel were subjected to severe plastic deformation by the groove pressing (GP) technique using 2 dies A2 type tool steel dies with dimensions of 96 mm X 96 mm, a corrugated die ...
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Recent synthetic efforts in the preparation of 2- (3,4)-alkenyl (aryl) quinoline molecules towards anti-kinetoplastid agents
(BarranquillaQuímicaSede Norte, 2019-12-19)Leishmaniasis, Chagas disease and African sleeping sickness have been considered some of the most important tropical protozoan afflictions. As the number of drugs currently available to treat these human illnesses is ...
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A New Educational Thermodynamic Software to Promote Critical Thinking in Youth Engineering Students
(BarranquillaSede Norte, 2019-12-22)This article presents the application of a new educational thermodynamic software called MOLECULARDISORDER, based on graphical user interfaces created in Matlab® to promote critical thinking in youth engineering students, ...
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CFD characterization and optimization of the cavitation phenomenon in dredging centrifugal pumps
(BarranquillaIngeniería MecánicaSede Norte, 2019-12-25)A model has been developed to characterize the cavitation phenomenon in dredging centrifugal pumps. The operating parameters of a cutter type dredger: swing speed, dredging depth, and inclination, impeller rpm, as well ...
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Exergy, Economic, and Life-Cycle Assessment of ORC System for Waste Heat Recovery in a Natural Gas Internal Combustion Engine
(BarranquillaIngeniería MecánicaSede Norte, 2020-01-01)In this article, an organicRankine cycle (ORC)was integrated into a 2-MWnatural gas engine to evaluate the possibility of generating electricity by recovering the engine’s exhaust heat. The operational anddesignvariableswiththe ...
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Advance Exergo-Economic Analysis of aWaste Heat Recovery System Using ORC for a Bottoming Natural Gas Engine
(BarranquillaIngeniería MecánicaSede Norte, 2020-01-05)This manuscript presents an advanced exergo-economic analysis of a waste heat recovery system based on the organic Rankine cycle from the exhaust gases of an internal combustion engine. Di erent operating conditions were ...
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Synthesis and Application of a Cationic Polyamine as Yankee Dryer Coating Agent for the Tissue Paper-Making Process
(BarranquillaSede Norte, 2020-01-09)Tissue paper is of high importance worldwide and, continuously, research is focused on improvements of the softening and durability properties of the paper which depend specifically on the production process. ...