Listar Artículos de investigación por título
Mostrando ítems 175-194 de 248
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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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Osseointegration of Antimicrobial Acrylic Bone Cements Modified with Graphene Oxide and Chitosan
(BarranquillaSede Norte, 2020-09-18)Acrylic bone cement (ABC) is one of the most used materials in orthopedic surgery, mainly for the fixation of orthopedic implants to the bone. However, ABCs usually present lack of biological activity and osseointegration ...
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Packham’s Triumph Pears (Pyrus communis L.) Post-Harvest Treatment during Cold Storage Based on Chitosan and Rue Essential Oil
(BarranquillaIngeniería AgroindustrialSede Norte, 2021-01-30): Pears (Pyrus communis L.) cv. Packham’s Triumph are very traditional for human consumption, but pear is a highly perishable climacteric fruit with a short shelf-life affected by several diseases with a microbial origin. ...
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Parametric Analysis CFD of the Hydraulic Performance of a Centrifugal Pump with Applications to the Dredging Industry
(BarranquillaIngeniería MecánicaSede Norte, 2020-01-20)The present study aims to use the analysis of CFD in a centrifugal dredge pump, to predict by mathematical correlations the effect that changes in the main variables of the dredging process would have on the behavior and ...
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Parametric Analysis of a Mechanical Draft Cooling Tower using Two Mathematical Models
(BarranquillaIngeniería QuímicaSede Norte, 2021-06-25)In the present work, a Matlab® computer code for cooling tower simulation was developed to perform a parametric analysis that determines the effect of the column cross-sectional area on multiple operating variables such ...
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Pasting and Dough Rheological Properties of Ackee (Blighia sapida) Aril Flour: A Contribution to the Search for Wheat Flour Substitutes
(BarranquillaIngeniería AgroindustrialSede Norte, 2021-04-26)Wheat is one of the most widely used cereals in the world. However, studies consider wheat flour doughs to be of low nutritional quality, as there is now greater public awareness of celiac disease and gluten intolerance. ...
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Performance assessment and economic perspectives of integrated PEM fuel cell and PEM electrolyzer for electric power generation
(BarranquillaIngeniería MecánicaSede Norte, 2020-12-07)The study presents a complete one-dimensional model to evaluate the parameters that describe the operation of a Proton Exchange Membrane (PEM) electrolyzer and PEM fuel cell. The mathematical modeling is implemented in ...
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Performance of Equilibrium FCC Catalysts in the Conversion of the SARA Fractions in VGO
(BarranquillaSede Norte, 2020-10-23)Two equilibrium FCC catalysts of the octane-barrel (ECAT-D) and resid (ECAT-R) types were used in the cracking of a typical vacuum gasoil (VGO) and its saturated (SF), aromatic (AF), and resin (RF) fractions. The experiments ...
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Photophysical study and in vitro approach against Leishmania panamensis of dicloro-5,10,15,20-tetrakis(4- bromophenyl)porphyrinato Sn(IV)
(BarranquillaSede Norte, 2021-11-08)Background: Photodynamic therapy activity against different biological systems has been reported for porphyrins. Porphyrin modifications through peripheral groups and/or by metal insertion inside the ring are main ...
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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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Phytochemical Screening of Callus and Cell Suspensions Cultures of Thevetia peruviana
(BarranquillaQuímicaSede Norte, 2020-02-13)Thevetia peruviana is an ornamental shrub grown-up in many tropical region of the world. This plant produces secondary metabolites with biological properties of interest for the pharmaceutical industry. The objective was ...
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Pilot-Scale Anaerobic Digestion of Pig Manure with Thermal Pretreatment: Stability Monitoring to Improve the Potential for Obtaining Methane
(BarranquillaIngeniería MecánicaSede Norte, 2022-08-13)Monitoring and controlling stability in anaerobic digestion (AD) systems are essential, since it allows to obtain information that helps to take corrective actions in case of deviations in the system and to guarantee a ...
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Planificación estratégica situacional: Un proceso metódico-práctico
(BarranquillaSede Norte, 202-01-20)La planificación situacional asume la crítica de la planificación tradicional, por su incapacidad de producir cambios, siendo de auto referencia del hombre de acción, que en última instancia debe resolver problemas ...
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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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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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Prevalence of dengue antibodies in healthy children and adults in different Colombian endemic areas
(BarranquillaSede Norte, 2019-05-23)Objectives: Colombia is a dengue hyperendemic country; however, the prevalence of antibodies against dengue in the general population including the inhabitants of rural areas is unknown. This study aimed to determine the ...
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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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Production and characterization of activated carbon from coal for gold adsorption in cyanide solutions
(BarranquillaIngeniería MecánicaSede Norte, 2019-06-06)En este trabajo se produjeron carbones activados utilizando carbón mineral como materia prima procedente de siete zonas carboníferas colombianas. La activación física se efectuó en dos etapas: una etapa de carbonización ...
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Pronombres en wayuunaiki y español: una mirada contrastiva
(BarranquillaMaestría en LingüísticaSede Norte, 2022-02-11)La literatura relacionada con estudios contrastivos entre lenguas nativas de Colombia y el español es muy escasa. En aras de contribuir al cambio de esta realidad, este estudio ofrece un análisis contrastivo de los ...
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Prospects for beyond the Standard Model physics searches at the Deep Underground Neutrino Experiment
(BarranquillaFísicaSede Norte, 2020-11-10)The Deep Underground Neutrino Experiment (DUNE) will be a powerful tool for a variety of physics topics. The high-intensity proton beams provide a large neutrino flux, sampled by a near detector system consisting of a ...