Con ocasión de mi visita al pueblo Kandozi, en Loreto en el 2010, conocí el problema de salud que viene sufriendo dicho pueblo con posterioridad a la llegada de terceros en su territorio, debido a las actividades extractivas de una empresa petrolera. El 90% del pueblo Kandozi viene sufriendo la enfermedad de Hepatitis B. Dicha enfermedad puede llevar a los Kandozi a la extinción. Esta situación me motivó a estudiar sobre los derechos de los pueblos indígenas. Más adelante, tuve la oportunidad de conocer el caso de las comunidades campesinas y rondas campesinas de las provincias de Celendín, HualgayocBambamarca y Cajamarca de la región Cajamarca, quienes se autoidentifican como descendientes de los pueblos indígenas Chachapoyas, Coremarcas, Caxamarcas y otros. Actualmente, el Estado busca imponer por la fuerza el megaproyecto minero Conga a tales pueblos. Dicho megaproyecto supo...

Con ocasión de mi visita al pueblo Kandozi, en Loreto en el 2010, conocí el problema de salud que viene sufriendo dicho pueblo con posterioridad a la llegada de terceros en su territorio, debido a las actividades extractivas de una empresa petrolera. El 90% del pueblo Kandozi viene sufriendo la enfermedad de Hepatitis B. Dicha enfermedad puede llevar a los Kandozi a la extinción. Esta situación me motivó a estudiar sobre los derechos de los pueblos indígenas. Más adelante, tuve la oportunidad de conocer el caso de las comunidades campesinas y rondas campesinas de las provincias de Celendín, HualgayocBambamarca y Cajamarca de la región Cajamarca, quienes se autoidentifican como descendientes de los pueblos indígenas Chachapoyas, Coremarcas, Caxamarcas y otros. Actualmente, el Estado busca imponer por la fuerza el megaproyecto minero Conga a tales pueblos. Dicho megaproyecto supo...

Tesis física, ubicada en Biblioteca Central. (M 345.733 S591 2017)

The literature acknowledges the importance of the education in Economics and Business Administration for the competitiveness of all countries. However, what exactly is educational quality in this discipline has been insufficiently studied. The objective of this paper is to contribute in this area by putting forward a conceptual model to assess and monitor quality in higher education. Our study intends to provide information that is significant to the lecturers and higher education managers that compete in an international knowledge-based economy, and particularly in Europe, and more precisely in Spain, in the European Higher Education Area.

Methylmercury (MeHg) is one of the most toxic organic mercury compounds found in the environment. The continuous exposure of human beings to this highly toxic compound may damage their nervous system. The present work reports the development and application of a novel electrochemical sensing technique for the quantification of MeHg using a modified carbon paste electrode with multi-walled carbon nanotubes (MWCNTs) combined with ion imprinted polymer, which is highly selective toward MeHg (CPE/MWCNTs/IIP-MeHg) detection. The ion imprinted polymer was synthesized using 2-mercaptobenzothiazole (MBT), acrylic acid (AA) and MeHg employed as ligand, functional monomer and template ion, respectively, and the synthesized material was characterized by Raman spectroscopy and SEM-EDX. Both the proposed and control sensors were characterized by cyclic voltammetry (CV) and electrochemical impedance s...

OBJETIVO: Describir y comparar las caracteristicas socio-demograficas y los estilos de vida de pacientes con cancer gastrico versus un grupo control con otros desordenes gástricos importantes, en centros de salud de referencia en Lima, Peru. METODOS: Estudio caso-control pareado por sexo y edad +2 anos. Tiempo: Setiembre 2001 a noviembre 2007. Encuesta a 96 casos con cancer gastrico y a 96 controles. RESULTADOS: No hubo diferencias significativas en raza, estado conyugal, exposicion apolvo de minerales, polvo de madera o de metales; consumo de alcohol, tabaco, carnes rojas, agregar sal a los alimentos, o temperatura elevada de los mismos. Se identifico lesion en el antro gastrico en 87,5% de los controles y 73% de los casos, siendo el adenocarcinoma tubular el tipo histologico mas frecuente entre los casos (56%). No hubo antecedente familiar de cancer en 85% de los casos y 59% de los co...

The present study reports the simultaneous determination of dipyrone and codeine by a simple, fast and low-cost method using carbon black paste electrode (CBPE) modified with α-cyclodextrin (CD) and hierarchical porous carbon (HPC). Using optimum conditions, the CD-HPC/CBPE sensor proposed in this study presented excellent electrochemical catalysis. Based on square wave voltammetry (SWV) analysis, linear concentration ranges of 0.46 to 35 µmol L−1 and 0.5 to 38 µmol L−1 were obtained for dipyrone and codeine, respectively, with nanomolar limits of detection for both analytes. The proposed sensor exhibited good stability, satisfactory repeatability and high sensibility in the determination of the analytes of interest. The application of the sensor in real samples was found to be successful, with recovery rates ranging from 96 to 106%. The method proposed in this study was found to ...

This study examined the feasibility of removing dexamethasone (DEX) from aqueous solutions using molecularly imprinted polymers (MIPs). The binding energy, used to evaluate the affinity between imprinted molecule and functional monomer, was calculated for DEX using molecular simulation via the density functional theory method. From this approach, three different functional monomers were tested: methacrylic acid, N-(Hydroxymethyl) acrylamide, and 2-hydroxyethyl methacrylate designated as MIP-DEX1, MIP-DEX2, MIP-DEX3, respectively. All of them were prepared by the precipitation polymerization method, with trimethylolpropane trimethacrylate used as the crosslinker. Moreover, the kinetics of adsorption and adsorption isotherms were evaluated using different models to assess the adsorption mechanisms of DEX on polymers. The results showed that equilibrium between the polymer and DEX is reache...

The present study reports the development and application of a rapid, low-cost in-situ method for the quantification of tartrazine in carbonated beverages using a smartphone-based colorimetric device with molecularly imprinted polymer (MIP). The MIP was synthesized using the free radical precipitation method with acrylamide (AC) as the functional monomer, N,N′-methylenebisacrylamide (NMBA) as the cross linker, and potassium persulfate (KPS) as radical initiator. The smartphone (RadesPhone)-operated rapid analysis device proposed in this study has dimensions of 10 × 10 × 15 cm and is illuminated internally by light emitting diode (LED) lights with intensity of 170 lux. The analytical methodology involved the use of a smartphone camera to capture images of MIP at various tartrazine concentrations, and the subsequent application of the Image-J software to calculate the red, green, blue ...

Polyphenols are compounds of secondary metabolism in plants and their action is recognized in the control against free radicals and reactive oxygen species. Th e study aimed to indicate polyphenols and their intake in fruits and vegetables as a protective action for human health due to stress against Covid-19. Given the rapid spread of the emerging pandemic Covid-19, it continues to be of great concern due to the mortality that occurs globally and there is no doubt about the level of stress in the population. Attempts to fl atten the epidemiological curve are diverse in that Covid-19 could not only aff ect psycho-mentally, but some non-communicable diseases may perhaps debut. Considering the serious situation, from the axiological point of view, a question arises: can the daily consumption of fruits and vegetables in the diet patterns generate, from the metabolic point of view, any poten...

Polyphenols are compounds of secondary metabolism in plants and their action is recognized in the control against free radicals and reactive oxygen species. Th e study aimed to indicate polyphenols and their intake in fruits and vegetables as a protective action for human health due to stress against Covid-19. Given the rapid spread of the emerging pandemic Covid-19, it continues to be of great concern due to the mortality that occurs globally and there is no doubt about the level of stress in the population. Attempts to fl atten the epidemiological curve are diverse in that Covid-19 could not only aff ect psycho-mentally, but some non-communicable diseases may perhaps debut. Considering the serious situation, from the axiological point of view, a question arises: can the daily consumption of fruits and vegetables in the diet patterns generate, from the metabolic point of view, any poten...

El objetivo del estudio fue determinar la actividad antioxidante y antimicrobiana del extracto etanólico de las partes aéreas de la especie Solanum radicans L.f. (huallpachaqui) procedente de San Juan de Chacña, provincia de Aymaraes, departamento de Apurímac. El extracto se llevó a sequedad, se fraccionó y determinó la presencia de metabolitos secundarios por reacciones de precipitación y/o coloración; se efectuó la caracterización del extracto mediante determinación de pH, sólidos totales, sólidos solubles, cenizas, color y aspecto. La actividad antioxidante fue evaluada por el método de inhibición del radical 2,2-difenil- 1-picrilhidrazil (DPPH) y el método del Poder Antioxidante de Reducción Férrica (FRAP); la actividad antimicrobiana se probó en cepas de Escherichia coli, Staphylococcus aureus, Pseudomonas aeruginosa y Proteus mirabilis. Se identificó presencia ...

This work describes the preparation of a molecularly imprinted polymer (MIP) platform on polyethylene terephthalate (MIP-PET) via RAFT polymerization for analyzing tartrazine using a smartphone. The MIP-PET platform was characterized using Fourier transform infrared (FTIR) techniques, Raman Spectroscopy, X-ray photoelectron spectroscopy (XPS), and confocal microscopy. The optimal pH and adsorption time conditions were determined. The adsorption capacity of the MIP-PET plates with RAFT treatment (0.057 mg cm−2) was higher than that of the untreated plates (0.028 mg cm−2). The kinetic study revealed a pseudo-first-order model with intraparticle diffusion, while the isotherm study indicated a fit for the Freundlich model. Additionally, the MIP-PET demonstrated durability by maintaining its adsorption capacity over five cycles of reuse without significant loss. To quantify tartrazine, im...

La cultura organizacional es el resultado de una variedad de procesos de interacción social que realizan los integrantes de una organización. Estos procesos son adquiridos, aprendidos y transmitidos. Una cultura organizacional exitosa une a las personas de la institución y las mantiene alineadas. El objetivo del presente estudio es mostrar una revisión panorámica de la relación que existe entre la cultura organizacional y la satisfacción laboral de médicos a nivel global, local y regional. Se realizó una revisión bibliográfica en la que se encontraron varios artículos de diversas revistas nacionales e internacionales. Existe un sustento teórico que justifica que los centros de salud que han orientado su cultura organizacional hacia los empleados ofrecen mejores condiciones de desarrollo, crecimiento, autonomía y mayores oportunidades de aprendizaje, promoción y formación....

Background: Canada, Mexico, and the United States are primary transit destinations for migrants in the Western Hemisphere. Migrants face barriers to accessing health services, including HIV and AIDS and sexually transmitted infection (STI) prevention. Mobile apps may enhance public health access for these populations. Objective: This study aims to systematically identify and evaluate mobile apps supporting HIV and STI prevention in Canada, Mexico, and the United States. Methods: An environmental scan of 357 mobile apps from the Google Play and Apple App stores was conducted on June 18, 2024, following the rigorous 6-step framework proposed by Fernández-Sánchez to ensure a systematic and comprehensive evaluation of apps for HIV and STI prevention. Predefined inclusion and exclusion criteria were applied, resulting in 6 eligible apps. Each app was assessed using the 29-item Mobile App Ra...

This work reports the fabrication of a novel electrochemical sensor for the detection of the complex ion [Cu(CN)3](aq)2−, one of the main components of the effluents from cyanide alkaline copper plating baths. This sensor was prepared by using a surface modified glassy carbon (GC) electrode with 1,8-dihydroxyantroquinone (1,8-DHAQ). It was characterized by electrochemical impedance, Raman spectroscopy and UV–Visible spectroscopy. The electrochemical detection of [Cu(CN)3](aq)2−was performed by differential pulse voltammetry. The 1,8-DHAQ/GC electrochemical sensor exhibits good reproducibility and a linear range of 5.50 × 10−7–3.81 × 10−6 mol L−1, with a detection limit (LOD) of 1.20 × 10−6 mol L−1, quantification limit (LOQ) of 3.97 × 10−6 mol L−1, and robustness to interfering Cl−, NO3−, SO42− y CO32− ions. Finally, a DFT approach suggests an almost par...

Methylmercury (MeHg+) is a mercury species that is very toxic for humans, and its monitoring and sorption from environmental samples of water are a public health concern. In this work, a combination of theory and experiment was used to rationally synthesize an ion-imprinted polymer (IIP) with the aim of the extraction of MeHg+ from samples of water. Interactions among MeHg+ and possible reaction components in the pre-polymerization stage were studied by computational simulation using density functional theory. Accordingly, 2-mercaptobenzimidazole (MBI) and 2-mercaptobenzothiazole (MBT), acrylic acid (AA) and ethanol were predicted as excellent sulfhydryl ligands, a functional monomer and porogenic solvent, respectively. Characterization studies by scanning electron microscopy (SEM) and Brunauer–Emmett–Teller (BET) revealed the obtention of porous materials with specific surface areas...

The aim of the study was to analyze the educational training, research and innovation in university teachers through a contemporary critical precept. Indicates that the social dynamics is based on patterns and analytical indicators of changes, experiences of the actors involved, in addition to the evaluative criterion by specialists in the type of method and creation of theories about the practices accumulated during the events of phenomena, processes, events or relevant events such as the demonstration of assumptions. Educational training, research and innovation in university teachers require exhaustive behaviors and deep critical reflection during the evaluative construction of facts and transmission of true knowledge that are acceptable to society, demonstrating social changes in the way of thinking and acting. Keywords: competence model – educational thinking – professional comp...

El objetivo del estudio fue analizar la formación educativa, investigación e innovación en docentes universitarios mediante un precepto crítico contemporáneo. Se indica que, la dinámica social está sustentada sobre patrones e indicadores analíticos de cambios, experiencias de actores involucrados, además, del criterio valorativo por parte de especialistas en el tipo de método y creación de teorías sobre las prácticas acumuladas durante los acontecimientos de fenómenos, procesos, sucesos o eventos que resultan relevantes como la demostración de supuestos. La formación educativa, investigación e innovación en docentes universitarios requiere de comportamientos exhaustivos y reflexión crítica profunda durante la construcción evaluativa de hechos y trasmisión de verdaderos conocimientos que sean aceptables para la sociedad demostrando, cambios sociales en la manera de p...

Since 2012-2013 influenza season, World Health Organization (who) recommends the formulation of tetravalent vaccines. Globally, many countries already use tetravalent vaccines in their national immunization programs, while in Latin America only a small number. Two Influenza b lineages co-circulate, their epidemiological behavior is unpredictable. On average they represent 22.6% of influenza cases and more than 50% in predominant seasons. The lack of concordance between recommended and circulating strains was 25 and 32% in the 2010-2017 and 2000-2013 seasons, respectively. There are no clinical differences between influenza A and B. It occurs more frequently from five to 19 years of age. Influenza b has a higher proportion of attributable deaths than influenza a (1.1 vs. 0.4%), or 2.65 (95% ci 1.18-5.94). A greater number of hospitalizations when the strains mismatch (46.3 vs. 28.5%; p <....