Juan Pablo Torrealba Arellano - Academia.edu (original) (raw)

Uploads

Papers by Juan Pablo Torrealba Arellano

Research paper thumbnail of Ante la muerte de un amigo

Research paper thumbnail of Structure and dynamics of the N-terminal loop of PsbQ from photosystem II of Spinacia oleracea

Biochemical and Biophysical Research Communications, 2006

Infrared and Raman spectroscopy were applied to identify restraints for the structure determinati... more Infrared and Raman spectroscopy were applied to identify restraints for the structure determination of the 20 amino acid loop between two b-sheets of the N-terminal region of the PsbQ protein of the oxygen evolving complex of photosystem II from Spinacia oleracea by restraint-based homology modeling. One of the initial models has shown a stable fold of the loop in a 20 ns molecular dynamics simulation that is in accordance with spectroscopic data. Cleavage of the first 12 amino acids leads to a permanent drift in the root means square deviation of the protein backbone and induces major structural changes.

Research paper thumbnail of Demographic Factors Affecting Perceived Fatigue Levels among CNC Lathe Operators

Fatigue in industrial workers is a multifactorial phenomenon. There are demographic factors that ... more Fatigue in industrial workers is a multifactorial phenomenon. There are demographic factors that may have a significant influence on the perception of fatigue, but they remain almost unexplored to date.. The present study addresses this issue. A survey to assess fatigue was conducted among CNC lathe operators in three industrial concerns where automotive parts are manufactured. Homokinetic joints in site 1 (121 workers); camshafts in site 2 (121 workers); pistons in site 3 (21 workers). The subjects completed a survey instrument that included two questionnaires to assess fatigue: SOFIíS and OFERíS. There was also a section asking for demographic information. The MANOVA procedure was used to explore the influence of the demographic factors on fatigue. Factors affecting the fatigue dimensions (SOFIíS) were gender, body weight, stature, total length of sleep during a day, and age. Factors affecting the fatigue states (OFER-S) were weight of load being handled, gender, total length of s...

Research paper thumbnail of Density Functional Theory of the absorption of SF6 on graphene

Research paper thumbnail of An Expert Diagnostic and Prediction System Based on Minimal Cut Set Techniques

Research paper thumbnail of El Partido Nacional en Chile: Su Rol en El Conflicto Político (1966-1973)

Atenea, 2009

Proyecto académico sin fines de lucro, desarrollado bajo la iniciativa de acceso abierto 157 Aten... more Proyecto académico sin fines de lucro, desarrollado bajo la iniciativa de acceso abierto 157 Atenea 499 I Sem. 2009 RESUMEN El objetivo de esta investigación es el análisis del comportamiento político del Partido Nacional en Chile. Nuestra problemática es investigar el rol jugado por este partido en el conflicto político entre 1966-1973. La hipótesis plantea que el Partido Nacional tiene un fuerte pragmatismo, lo que lleva a desarrollar distintas fases en sus siete años de historia. En el desarrollo de la investigación distinguimos cinco fases: la primera, ante el Gobierno democratacristiano, que se caracteriza por la recuperación electoral; la segunda, de interregno, es la negativa para ratificar a Salvador Allende como Presidente en el Congreso. Las siguientes fases surgen durante el Gobierno de la Unidad Popular: una deslegitimadora, una desestabilizadora y, finalmente, el quiebre definitivo con el Gobierno.

Research paper thumbnail of Ante la muerte de un amigo

Research paper thumbnail of Structure and dynamics of the N-terminal loop of PsbQ from photosystem II of Spinacia oleracea

Biochemical and Biophysical Research Communications, 2006

Infrared and Raman spectroscopy were applied to identify restraints for the structure determinati... more Infrared and Raman spectroscopy were applied to identify restraints for the structure determination of the 20 amino acid loop between two b-sheets of the N-terminal region of the PsbQ protein of the oxygen evolving complex of photosystem II from Spinacia oleracea by restraint-based homology modeling. One of the initial models has shown a stable fold of the loop in a 20 ns molecular dynamics simulation that is in accordance with spectroscopic data. Cleavage of the first 12 amino acids leads to a permanent drift in the root means square deviation of the protein backbone and induces major structural changes.

Research paper thumbnail of Demographic Factors Affecting Perceived Fatigue Levels among CNC Lathe Operators

Fatigue in industrial workers is a multifactorial phenomenon. There are demographic factors that ... more Fatigue in industrial workers is a multifactorial phenomenon. There are demographic factors that may have a significant influence on the perception of fatigue, but they remain almost unexplored to date.. The present study addresses this issue. A survey to assess fatigue was conducted among CNC lathe operators in three industrial concerns where automotive parts are manufactured. Homokinetic joints in site 1 (121 workers); camshafts in site 2 (121 workers); pistons in site 3 (21 workers). The subjects completed a survey instrument that included two questionnaires to assess fatigue: SOFIíS and OFERíS. There was also a section asking for demographic information. The MANOVA procedure was used to explore the influence of the demographic factors on fatigue. Factors affecting the fatigue dimensions (SOFIíS) were gender, body weight, stature, total length of sleep during a day, and age. Factors affecting the fatigue states (OFER-S) were weight of load being handled, gender, total length of s...

Research paper thumbnail of Density Functional Theory of the absorption of SF6 on graphene

Research paper thumbnail of An Expert Diagnostic and Prediction System Based on Minimal Cut Set Techniques

Research paper thumbnail of El Partido Nacional en Chile: Su Rol en El Conflicto Político (1966-1973)

Atenea, 2009

Proyecto académico sin fines de lucro, desarrollado bajo la iniciativa de acceso abierto 157 Aten... more Proyecto académico sin fines de lucro, desarrollado bajo la iniciativa de acceso abierto 157 Atenea 499 I Sem. 2009 RESUMEN El objetivo de esta investigación es el análisis del comportamiento político del Partido Nacional en Chile. Nuestra problemática es investigar el rol jugado por este partido en el conflicto político entre 1966-1973. La hipótesis plantea que el Partido Nacional tiene un fuerte pragmatismo, lo que lleva a desarrollar distintas fases en sus siete años de historia. En el desarrollo de la investigación distinguimos cinco fases: la primera, ante el Gobierno democratacristiano, que se caracteriza por la recuperación electoral; la segunda, de interregno, es la negativa para ratificar a Salvador Allende como Presidente en el Congreso. Las siguientes fases surgen durante el Gobierno de la Unidad Popular: una deslegitimadora, una desestabilizadora y, finalmente, el quiebre definitivo con el Gobierno.

Log In