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Papers by jhon rodriguez

Cla ude I. Sbell ba s been T be 43-year-old Sbell was na med [he ne w c hairman of tbe bor n and ... more Cla ude I. Sbell ba s been T be 43-year-old Sbell was na med [he ne w c hairman of tbe bor n and r aised in Pine Bluff. Department of M anagement. Ark. He r ecei ved his B .A. Hi s appoimmenr is effective from M aryville (Tenn.) Co limmedi ate l y. l ege and his M.S. f ro m the She ll s ucceds F r e mont A. Uni ve r s it y of T e nnes see. S hu~l. who resigned after , the His f irst f acuh y po sitio n SprIng (~rm to de vot e fully me was a s associate professor to tea c h 109 and r esear ch 10 the o f mark eti ng at Tenn essee depart me nt. P o lytechnic In st itue. Prior to his appoint ment. '. Shell had be en servi ng as Shel1 wa s, a m a j or I n [he as s is ca m director of [he Arm y d~r l ngW o rld War II. ~nd P la ce ment Se rvi ce. He came wo r ke d In the product planmng to Sout he r n in 1960 as ass is t-di vis ion of th e Fo r d Mo tor a m dir e ctor of the Small 8 usi-Co. afte r college. t ness In s t itut e and a ssi s t am He r e c e ived his Ph. D. at ! Vo l ume 47 Tu .. do y , Jun e 21 , 1966 ~umber 164 profe s so r of ma r keti ng. So uthe rn. CLAUDE 1. sHELL

ha experimentado múltiples dificultades financieras y contables a razón de la continua evasión de... more ha experimentado múltiples dificultades financieras y contables a razón de la continua evasión de impuestos. Esta situación ha conllevado que algunos comerciantes decidan cerrar sus establecimientos con el fin de convertirse en comerciantes informales. Con el propósito de identificar los efectos y consecuencias económicas para los comerciantes minoristas de la localidad, se estableció como objetivo: Identificar los principales inconvenientes que presentan los comerciantes en la localidad de San Mateo-Soacha al momento de declarar y pagar impuestos. El desarrollo de la investigación se efectuó bajo un enfoque cualitativo, mediante un estudio diagnóstico, aplicando un instrumento que identificó los factores relevantes que inciden en el cumplimiento de las obligaciones fiscales, determinando las variables económicas que Artículo original

Lecturas de Economía, 2009

Este artículo calcula el efecto de los títulos sobre los salarios en el mercado laboral de Cali e... more Este artículo calcula el efecto de los títulos sobre los salarios en el mercado laboral de Cali encontrando que la rentabilidad adicional sobre los salarios de poseer un título de bachiller es del 25% y 12% para marzo y septiembre del 2000, respectivamente, y del 45% y el 37% para marzo y septiembre con respecto al título universitario. El análisis del efecto del título se extiende a la regresión por cuantiles ya que esta aproximación es más acorde con la teoría de la señalización y el escudriñamiento. Los resultados encontrados a partir de la regresión por cuantiles muestran que la señalización y el escudriñamiento sobre el título universitario es un fenómeno que se presenta con mayor intensidad en el mercado laboral de Cali, lo cual puede deberse a la heterogeneidad en la calidad del título universitario. Palabras clave: educación, señalización, capital humano, información asimétrica y privada. Clasificación JEL: I2, J7, J24, D82. Abstract: This article calculates the sheeps...

Universidad de Antioquia, 2006

This article presents empirical evidence about the relationship between job openings and unemploy... more This article presents empirical evidence about the relationship between job openings and unemployment through a Beveridge Curve for the city of Popayán between 2001 and 2005, following a panel data model by work areas. The results of the model show that the elasticity of unemployment with respect to job openings is statistically significant and positive. This result can be due

Estudios Gerenciales, 2006

Este articulo discute en primer lugar dos problemas fundamentales en datos de panel: las condicio... more Este articulo discute en primer lugar dos problemas fundamentales en datos de panel: las condiciones iniciales y la exogeneidad. En segundo lugar, muestra una aplicacion al mercado laboral espanol de un probit dinamico para el periodo 1994-2000.

The initial encounter between a buyer and a seller has received much attention among practitioner... more The initial encounter between a buyer and a seller has received much attention among practitioners. The first time a buyer interacts with a seller is thought to be highly influential. The premise is that buyers form an opinion during this first encounter, or even the first minutes of this encounter. Furthermore these first impressions tend to stay consistent over time (Tapp, 1999). Therefore the practitioner's literature suggests that sellers should create the best first impression possible: by matching and mirroring buyer behaviour (Boe, 2011a), using nonverbal communication (Goman, 2011) and aligning it with verbal communication (Ramsey, 2003), being groomed (Dumont, 2011), timeliness (Lemons, 2011) and adjusting the handshake (Boe, 2011b). Although academic research has also indicated that initial encounters are an important first hurdle (Dwyer et al., 1987), a holistic view on an initial encounter between a buyer and a seller in line with practice is still missing. Research ...

Journal of Back and Musculoskeletal Rehabilitation, 2019

The nuclear human uracil-DNA glycosylase UNG2 is the major enzyme for removal of both misincorpor... more The nuclear human uracil-DNA glycosylase UNG2 is the major enzyme for removal of both misincorporated uracil (U:A) and miscoding deaminated cytosine (U:G) in the genome (Kavli et al. 2002). In addition, UNG2 is essential in adaptive immunity where it works together with the deaminase AID in affinity maturation of antibodies (PMID:17116429). The highly conserved catalytic C-terminal core domain of UNG (C-UNG2, residues 93-313) has previously been crystallized both as native protein and in a complex with DNA (Mol et al. 1995; Slupphaug et al. 1996). The crystal structures display a compact globular domain. This is in contrast to the less conserved N-terminal region that is predicted to be mainly unstructured (Kavli et al. 2002) and is not necessary for enzymatic activity. However, there are noticeable changes in biochemical properties of fulllength UNG2 that are not displayed by the catalytic domain alone. These include a strong single-strand DNA preference of full-length UNG2 in the presence of physiological concentrations of Mg 2+ (Kavli et al. 2002). The N-terminal region of UNG2 contains a nuclear localization signal and PCNA (proliferating cell nuclear antigen) interacting motif (PIP-box) (Otterlei et al. 1999) that targets the repair enzyme to the nucleus and replication foci, respectively. Moreover, this region contains three cell-cycle regulated phosphorylation sites (Hagen et al. 2008). The stepwise phosphorylation of S23, T60 and S64 through the cell cycle is apparently catalyzed by cyclin-dependent kinases. In replicating cells, PCNA and replication protein A (RPA) associate with the N-terminal region of UNG2 at two specific motifs (Mer et al. 2000; Otterlei et al. 1999). Binding to PCNA indicate the important role of UNG2 in rapid postreplicative removal of misincorporated dUMP at the replication fork (Otterlei et al. 1999) whereas binding to RPA might direct UNG2 to the Abstract Human uracil N-glycosylase isoform 2-UNG2 consists of an N-terminal intrinsically disordered regulatory domain (UNG2 residues 1-92, 9.3 kDa) and a C-terminal structured catalytic domain (UNG2 residues 93-313, 25.1 kDa). Here, we report the backbone 1 H, 13 C, and 15 N chemical shift assignment as well as secondary structure analysis of the N-and C-terminal domains of UNG2 representing the full-length UNG2 protein.

Context: Electric power generation systems designed as a point solution to supply needs away from... more Context: Electric power generation systems designed as a point solution to supply needs away from the power grid typically make use of the energy resources available in the area. These systems are custom designed to supply a specific need, and with high efficiency criteria in mind. A fundamental element in these systems are the batteries charge and control circuits. Method: The regulation system was designed for the wind turbine prototype of the Francisco Jos de Caldas District University, campus of the Technological Faculty, and considering its use in low-income housing. The module has three intermediate stages of regulation: rectification and conditioning, DC/DC regulation and battery charging, and voltage inversion. Results: We achieved a prototype of high efficiency, low cost and high performance in laboratory tests. Conclusions: The load control and regulation system is a low-cost, high-performance alternative to solve problems of supplying electric power in non-interconnected ...

Stress was interpreted as a nonspecific reaction of the organism to a situation that would threat... more Stress was interpreted as a nonspecific reaction of the organism to a situation that would threaten its homeostasis. Several factors in the modern world can be related to this condition: the search for a perfect body, the labor market dispute or the pressure to conquer everything as fast as possible. Associated with these factors, one can add the intense, naturally stressful, routine in which man is inserted. At the experimental level, several effects are observed at a systemic and behavioral level in rats that have been submitted to food restriction models, finding that the gastrointestinal system is quite vulnerable to stress in general. In specific cases of food stress, it was observed that the manifestations vary according to the life stage of the animal and the applied model. In this sense, the present research aims to evaluate the influence of food restriction on the intestinal tunica morphology of rats submitted to a chronic food stress model. For this, 27 animals were divide...

This paper discusses the negative effect that inheritances, gifts or lotteries (which usually can... more This paper discusses the negative effect that inheritances, gifts or lotteries (which usually can be thought of as fortuitous profits) have on labor participation. This effect is also known in the literature as the Carnegie hypothesis. In order to analyze this effect, this paper considers women from Spain during the period 1994-2000. The results of the panel data for a dynamic probit show that there is a significant negative relationship between labor participation and fortuitous profits, which supports the results of Holtz-Eakin et al. (1993) for the United States.

Emergency Medicine International, 2020

Prehospital care is essential for airway preservation in pediatric patients who require early end... more Prehospital care is essential for airway preservation in pediatric patients who require early endotracheal intubation to improve oxygenation and prevent aspiration. However, high frequencies of failure of endotracheal intubation have been reported for this age group. We aimed to analyze the frequency of failure of endotracheal intubation in pediatric patients within a prehospital context and compare it with adult patients. Thus, a systematic revision of literature with a meta-analysis was performed using a study search and selection strategy ensuring extensiveness, sensitivity, and reproducibility. Meta-analyses were performed for odds ratio, DerSimonian and Laird’s Q test was used to assess heterogeneity, and Egger and Begg’s test was used to assess publication bias. Overall, 17 papers and 8772 patients were included, and the main cause of prehospital care was assessed to be trauma. Failed endotracheal intubation frequency was 0.4%–52.6% in pediatric patients. The most frequent com...

Revista científica, 2011

Se expondrá un acercamiento en torno a la enseñanza de la energía en el contexto de la mecánica c... more Se expondrá un acercamiento en torno a la enseñanza de la energía en el contexto de la mecánica clásica, llevado a cavo con estudiantes de sexto grado del colegio san Bernardino. Se desarrolla un modulo didáctico diseñado a partir de la reconstrucción conceptual acerca del concepto de energía basado en los trabajos realizados por Bernoulli, Leibniz y Joule. Con el diseño e implementación de una estrategia didáctica, se recogen experiencias de aula tales como discursos emitidos por parte de los estudiantes y dibujos relacionado con lo que ellos conciben por energía. Estos elementos son útiles para los maestros ya que son susceptibles de análisis y constituyen herramientas para identificar la concepción que los estudiantes tienen a cerca de la energía. Lo cual permite a los docentes la generación de propuestas pedagógicas con base a las ideas previas de los estudiantes para generar vínculos con el concepto de energía.

FEBS Letters, 2016

The tumor suppressor inhibitor of growth 4 (ING4) regulates chromatin structure by recruiting the... more The tumor suppressor inhibitor of growth 4 (ING4) regulates chromatin structure by recruiting the histone acetyl transferase complex HBO1 to sites with histone H3 trimethylated at K4 (H3K4me3). ING4 dimerizes through its N-terminal domain and recognizes H3K4me3 by the C-terminal plant homeodomain (PHD). The central region of ING4 is disordered and contains the nuclear localization signal (NLS). Here, utilizing electrophoresis and NMR, we show that ING4 binds double-stranded DNA through its central region with micromolar affinity. Our findings suggest that the cooperativity arising from the presence of two DNA-Accepted Article This article is protected by copyright. All rights reserved. binding regions in the ING4 dimer, as well as two H3K4me3-binding PHD fingers, may strengthen nucleosome binding and HBO1 complex recruitment.

Revista Colombiana De Materiales, May 21, 2014

Se evaluó el efecto de los parámetro de proyección tales como: relación del flujo de gases y diná... more Se evaluó el efecto de los parámetro de proyección tales como: relación del flujo de gases y dinámica del jet de aire sobre los defectos estructurales (porosidad) y la rugosidad superficial de recubrimientos de Al 2 O 3-43% en peso de TiO 2 depositados mediante proyección térmica por combustión oxiacetilénica a partir de polvos de la casa comercial Saint-Gobain® referencia SG-109. Los resultados obtenidos indican que los recubrimientos elaborados presentan cambios en la estructura interna y superficial del recubrimiento según varíe los parámetros antes mencionados, encontrando que la más baja porosidad y rugosidad superficial se obtienen utilizando una llama oxidante recubierta por un jet de aire cilíndrico cuya presión fue de 30 psi.

Revista Colombiana De Materiales, May 21, 2014

Cla ude I. Sbell ba s been T be 43-year-old Sbell was na med [he ne w c hairman of tbe bor n and ... more Cla ude I. Sbell ba s been T be 43-year-old Sbell was na med [he ne w c hairman of tbe bor n and r aised in Pine Bluff. Department of M anagement. Ark. He r ecei ved his B .A. Hi s appoimmenr is effective from M aryville (Tenn.) Co limmedi ate l y. l ege and his M.S. f ro m the She ll s ucceds F r e mont A. Uni ve r s it y of T e nnes see. S hu~l. who resigned after , the His f irst f acuh y po sitio n SprIng (~rm to de vot e fully me was a s associate professor to tea c h 109 and r esear ch 10 the o f mark eti ng at Tenn essee depart me nt. P o lytechnic In st itue. Prior to his appoint ment. '. Shell had be en servi ng as Shel1 wa s, a m a j or I n [he as s is ca m director of [he Arm y d~r l ngW o rld War II. ~nd P la ce ment Se rvi ce. He came wo r ke d In the product planmng to Sout he r n in 1960 as ass is t-di vis ion of th e Fo r d Mo tor a m dir e ctor of the Small 8 usi-Co. afte r college. t ness In s t itut e and a ssi s t am He r e c e ived his Ph. D. at ! Vo l ume 47 Tu .. do y , Jun e 21 , 1966 ~umber 164 profe s so r of ma r keti ng. So uthe rn. CLAUDE 1. sHELL

ha experimentado múltiples dificultades financieras y contables a razón de la continua evasión de... more ha experimentado múltiples dificultades financieras y contables a razón de la continua evasión de impuestos. Esta situación ha conllevado que algunos comerciantes decidan cerrar sus establecimientos con el fin de convertirse en comerciantes informales. Con el propósito de identificar los efectos y consecuencias económicas para los comerciantes minoristas de la localidad, se estableció como objetivo: Identificar los principales inconvenientes que presentan los comerciantes en la localidad de San Mateo-Soacha al momento de declarar y pagar impuestos. El desarrollo de la investigación se efectuó bajo un enfoque cualitativo, mediante un estudio diagnóstico, aplicando un instrumento que identificó los factores relevantes que inciden en el cumplimiento de las obligaciones fiscales, determinando las variables económicas que Artículo original

Lecturas de Economía, 2009

Este artículo calcula el efecto de los títulos sobre los salarios en el mercado laboral de Cali e... more Este artículo calcula el efecto de los títulos sobre los salarios en el mercado laboral de Cali encontrando que la rentabilidad adicional sobre los salarios de poseer un título de bachiller es del 25% y 12% para marzo y septiembre del 2000, respectivamente, y del 45% y el 37% para marzo y septiembre con respecto al título universitario. El análisis del efecto del título se extiende a la regresión por cuantiles ya que esta aproximación es más acorde con la teoría de la señalización y el escudriñamiento. Los resultados encontrados a partir de la regresión por cuantiles muestran que la señalización y el escudriñamiento sobre el título universitario es un fenómeno que se presenta con mayor intensidad en el mercado laboral de Cali, lo cual puede deberse a la heterogeneidad en la calidad del título universitario. Palabras clave: educación, señalización, capital humano, información asimétrica y privada. Clasificación JEL: I2, J7, J24, D82. Abstract: This article calculates the sheeps...

Universidad de Antioquia, 2006

This article presents empirical evidence about the relationship between job openings and unemploy... more This article presents empirical evidence about the relationship between job openings and unemployment through a Beveridge Curve for the city of Popayán between 2001 and 2005, following a panel data model by work areas. The results of the model show that the elasticity of unemployment with respect to job openings is statistically significant and positive. This result can be due

Estudios Gerenciales, 2006

Este articulo discute en primer lugar dos problemas fundamentales en datos de panel: las condicio... more Este articulo discute en primer lugar dos problemas fundamentales en datos de panel: las condiciones iniciales y la exogeneidad. En segundo lugar, muestra una aplicacion al mercado laboral espanol de un probit dinamico para el periodo 1994-2000.

The initial encounter between a buyer and a seller has received much attention among practitioner... more The initial encounter between a buyer and a seller has received much attention among practitioners. The first time a buyer interacts with a seller is thought to be highly influential. The premise is that buyers form an opinion during this first encounter, or even the first minutes of this encounter. Furthermore these first impressions tend to stay consistent over time (Tapp, 1999). Therefore the practitioner's literature suggests that sellers should create the best first impression possible: by matching and mirroring buyer behaviour (Boe, 2011a), using nonverbal communication (Goman, 2011) and aligning it with verbal communication (Ramsey, 2003), being groomed (Dumont, 2011), timeliness (Lemons, 2011) and adjusting the handshake (Boe, 2011b). Although academic research has also indicated that initial encounters are an important first hurdle (Dwyer et al., 1987), a holistic view on an initial encounter between a buyer and a seller in line with practice is still missing. Research ...

Journal of Back and Musculoskeletal Rehabilitation, 2019

The nuclear human uracil-DNA glycosylase UNG2 is the major enzyme for removal of both misincorpor... more The nuclear human uracil-DNA glycosylase UNG2 is the major enzyme for removal of both misincorporated uracil (U:A) and miscoding deaminated cytosine (U:G) in the genome (Kavli et al. 2002). In addition, UNG2 is essential in adaptive immunity where it works together with the deaminase AID in affinity maturation of antibodies (PMID:17116429). The highly conserved catalytic C-terminal core domain of UNG (C-UNG2, residues 93-313) has previously been crystallized both as native protein and in a complex with DNA (Mol et al. 1995; Slupphaug et al. 1996). The crystal structures display a compact globular domain. This is in contrast to the less conserved N-terminal region that is predicted to be mainly unstructured (Kavli et al. 2002) and is not necessary for enzymatic activity. However, there are noticeable changes in biochemical properties of fulllength UNG2 that are not displayed by the catalytic domain alone. These include a strong single-strand DNA preference of full-length UNG2 in the presence of physiological concentrations of Mg 2+ (Kavli et al. 2002). The N-terminal region of UNG2 contains a nuclear localization signal and PCNA (proliferating cell nuclear antigen) interacting motif (PIP-box) (Otterlei et al. 1999) that targets the repair enzyme to the nucleus and replication foci, respectively. Moreover, this region contains three cell-cycle regulated phosphorylation sites (Hagen et al. 2008). The stepwise phosphorylation of S23, T60 and S64 through the cell cycle is apparently catalyzed by cyclin-dependent kinases. In replicating cells, PCNA and replication protein A (RPA) associate with the N-terminal region of UNG2 at two specific motifs (Mer et al. 2000; Otterlei et al. 1999). Binding to PCNA indicate the important role of UNG2 in rapid postreplicative removal of misincorporated dUMP at the replication fork (Otterlei et al. 1999) whereas binding to RPA might direct UNG2 to the Abstract Human uracil N-glycosylase isoform 2-UNG2 consists of an N-terminal intrinsically disordered regulatory domain (UNG2 residues 1-92, 9.3 kDa) and a C-terminal structured catalytic domain (UNG2 residues 93-313, 25.1 kDa). Here, we report the backbone 1 H, 13 C, and 15 N chemical shift assignment as well as secondary structure analysis of the N-and C-terminal domains of UNG2 representing the full-length UNG2 protein.

Context: Electric power generation systems designed as a point solution to supply needs away from... more Context: Electric power generation systems designed as a point solution to supply needs away from the power grid typically make use of the energy resources available in the area. These systems are custom designed to supply a specific need, and with high efficiency criteria in mind. A fundamental element in these systems are the batteries charge and control circuits. Method: The regulation system was designed for the wind turbine prototype of the Francisco Jos de Caldas District University, campus of the Technological Faculty, and considering its use in low-income housing. The module has three intermediate stages of regulation: rectification and conditioning, DC/DC regulation and battery charging, and voltage inversion. Results: We achieved a prototype of high efficiency, low cost and high performance in laboratory tests. Conclusions: The load control and regulation system is a low-cost, high-performance alternative to solve problems of supplying electric power in non-interconnected ...

Stress was interpreted as a nonspecific reaction of the organism to a situation that would threat... more Stress was interpreted as a nonspecific reaction of the organism to a situation that would threaten its homeostasis. Several factors in the modern world can be related to this condition: the search for a perfect body, the labor market dispute or the pressure to conquer everything as fast as possible. Associated with these factors, one can add the intense, naturally stressful, routine in which man is inserted. At the experimental level, several effects are observed at a systemic and behavioral level in rats that have been submitted to food restriction models, finding that the gastrointestinal system is quite vulnerable to stress in general. In specific cases of food stress, it was observed that the manifestations vary according to the life stage of the animal and the applied model. In this sense, the present research aims to evaluate the influence of food restriction on the intestinal tunica morphology of rats submitted to a chronic food stress model. For this, 27 animals were divide...

This paper discusses the negative effect that inheritances, gifts or lotteries (which usually can... more This paper discusses the negative effect that inheritances, gifts or lotteries (which usually can be thought of as fortuitous profits) have on labor participation. This effect is also known in the literature as the Carnegie hypothesis. In order to analyze this effect, this paper considers women from Spain during the period 1994-2000. The results of the panel data for a dynamic probit show that there is a significant negative relationship between labor participation and fortuitous profits, which supports the results of Holtz-Eakin et al. (1993) for the United States.

Emergency Medicine International, 2020

Prehospital care is essential for airway preservation in pediatric patients who require early end... more Prehospital care is essential for airway preservation in pediatric patients who require early endotracheal intubation to improve oxygenation and prevent aspiration. However, high frequencies of failure of endotracheal intubation have been reported for this age group. We aimed to analyze the frequency of failure of endotracheal intubation in pediatric patients within a prehospital context and compare it with adult patients. Thus, a systematic revision of literature with a meta-analysis was performed using a study search and selection strategy ensuring extensiveness, sensitivity, and reproducibility. Meta-analyses were performed for odds ratio, DerSimonian and Laird’s Q test was used to assess heterogeneity, and Egger and Begg’s test was used to assess publication bias. Overall, 17 papers and 8772 patients were included, and the main cause of prehospital care was assessed to be trauma. Failed endotracheal intubation frequency was 0.4%–52.6% in pediatric patients. The most frequent com...

Revista científica, 2011

Se expondrá un acercamiento en torno a la enseñanza de la energía en el contexto de la mecánica c... more Se expondrá un acercamiento en torno a la enseñanza de la energía en el contexto de la mecánica clásica, llevado a cavo con estudiantes de sexto grado del colegio san Bernardino. Se desarrolla un modulo didáctico diseñado a partir de la reconstrucción conceptual acerca del concepto de energía basado en los trabajos realizados por Bernoulli, Leibniz y Joule. Con el diseño e implementación de una estrategia didáctica, se recogen experiencias de aula tales como discursos emitidos por parte de los estudiantes y dibujos relacionado con lo que ellos conciben por energía. Estos elementos son útiles para los maestros ya que son susceptibles de análisis y constituyen herramientas para identificar la concepción que los estudiantes tienen a cerca de la energía. Lo cual permite a los docentes la generación de propuestas pedagógicas con base a las ideas previas de los estudiantes para generar vínculos con el concepto de energía.

FEBS Letters, 2016

The tumor suppressor inhibitor of growth 4 (ING4) regulates chromatin structure by recruiting the... more The tumor suppressor inhibitor of growth 4 (ING4) regulates chromatin structure by recruiting the histone acetyl transferase complex HBO1 to sites with histone H3 trimethylated at K4 (H3K4me3). ING4 dimerizes through its N-terminal domain and recognizes H3K4me3 by the C-terminal plant homeodomain (PHD). The central region of ING4 is disordered and contains the nuclear localization signal (NLS). Here, utilizing electrophoresis and NMR, we show that ING4 binds double-stranded DNA through its central region with micromolar affinity. Our findings suggest that the cooperativity arising from the presence of two DNA-Accepted Article This article is protected by copyright. All rights reserved. binding regions in the ING4 dimer, as well as two H3K4me3-binding PHD fingers, may strengthen nucleosome binding and HBO1 complex recruitment.

Revista Colombiana De Materiales, May 21, 2014

Se evaluó el efecto de los parámetro de proyección tales como: relación del flujo de gases y diná... more Se evaluó el efecto de los parámetro de proyección tales como: relación del flujo de gases y dinámica del jet de aire sobre los defectos estructurales (porosidad) y la rugosidad superficial de recubrimientos de Al 2 O 3-43% en peso de TiO 2 depositados mediante proyección térmica por combustión oxiacetilénica a partir de polvos de la casa comercial Saint-Gobain® referencia SG-109. Los resultados obtenidos indican que los recubrimientos elaborados presentan cambios en la estructura interna y superficial del recubrimiento según varíe los parámetros antes mencionados, encontrando que la más baja porosidad y rugosidad superficial se obtienen utilizando una llama oxidante recubierta por un jet de aire cilíndrico cuya presión fue de 30 psi.

Revista Colombiana De Materiales, May 21, 2014