The Quantitative Impact of Using 3D Printed Anatomical Models for Surgical Planning Optimization: Literature Review.

3D printing has entered the medical field as a visualization tool that allows the manufacture of three-dimensional (3D) models that physically represent the anatomy of a patient in need of analysis to improve surgical results. This article analyzes the literature around reported study cases that make use of anatomical models for their surgical processes' planning, focusing on obtaining the quantitative results of each one of them. A search of case studies was carried out in the main medical databases such as PubMed, ScienceDirect, SpringerLink, among others; to obtain the most relevant results of the 56 selected articles, the information of each study was analyzed and categorized. These articles presented figures and data about the benefits that are considered more representative to measure the positive impact of this technology. These benefits are summarized in variables such as the decrease in surgical time, greater accuracy in the diagnosis of pathology, blood loss reduction, and decreasing operating room costs; owed to an improvement in the surgery planning. It was found that in all the cases analyzed there was an improvement in the surgical results related to these variables, which were summarized in macro figures that combine this improvement quantitatively. In the analyzed studies, it was evident that there is great potential in the use of 3D printing for presurgical planning, being as the results of these analyzed interventions were better when using this technology. In addition, it was found that the results obtained initially, before applying the inclusion and exclusion criteria, were mostly of a qualitative nature; expressing the perception of researchers regarding the positive use of this tool in the field and evidencing an opportunity for this research to focus on concrete and technical information to show in numerical terms the effectiveness of this tool, to demonstrate the cost-benefit that it has for the field.

Nanocelluloses as sustainable membrane materials for separation and filtration technologies: Principles, opportunities, and challenges.

Membrane technology is of great interest in various environmental and industrial applications, where membranes are used to separate different mixtures of gas, solid-gas, liquid-gas, liquid-liquid, or liquid-solid. In this context, nanocellulose (NC) membranes can be produced with predefined properties for specific separation and filtration technologies. This review explains the use of nanocellulose membranes as a direct, effective, and sustainable way to solve environmental and industrial problems. The different types of nanocellulose (i.e., nanoparticles, nanocrystals, nanofibers) and their fabrication methods (i.e., mechanical, physical, chemical, mechanochemical, physicochemical, and biological) are discussed. In particular, the structural properties of nanocellulose membranes (i.e., mechanical strength, interactions with various fluids, biocompatibility, hydrophilicity, and biodegradability) are reviewed in relation to membrane performances. Advanced applications of nanocellulose membranes in reverse osmosis (RO), microfiltration (MF), nanofiltration (NF), and ultrafiltration (UF) are highlighted. The applications of nanocellulose membranes offer significant advantages as a key technology for air purification, gas separation, and water treatment, including suspended or soluble solids removal, desalination, or liquid removal using pervaporation membranes or electrically driven membranes. This review will cover the current state of research, future prospects, and challenges in commercializing nanocellulose membranes with respect to membrane applications.

Double Hook Perylene Diimide as a New Receptor for PAHs: An Experimental and Theoretical Study.

In a one-step reaction, we prepared a dibenzylamine perylene diimide derivative (PDI). Its double hook structure allows for self-association with a constant of Kd ∼108  M-1 determined by fluorescence. We confirmed its ability to bind PAHs using UV/Vis, fluorescence, and 1 H NMR titrations in CHCl3 . The complex formation signature in UV/vis is a new band at 567 nm. The calculated binding constants (Ka ∼104  M-1 ) follow the trend pyrene>perylene>phenanthrene>naphthalene>anthracene. Theoretical modeling of these systems using DFT ωB97X-D/6-311G(d,p) proved helpful in rationalizing the complex formation and the observed association trend. The distinctive signal in UV/vis is due to a charge transfer in the complex from orbitals in the guest to the host. SAPT(DFT) confirmed that the driving forces in the complex formation are exchange and dispersion (π-π interactions). Still, the recognition ability depends on the electrostatic component of the interaction, a minor fraction.

Nanoparticle and Nanostructure Synthesis and Controlled Growth Methods.

Nanomaterials are materials with one or more nanoscale dimensions (internal or external) (i.e., 1 to 100 nm). The nanomaterial shape, size, porosity, surface chemistry, and composition are controlled at the nanoscale, and this offers interesting properties compared with bulk materials. This review describes how nanomaterials are classified, their fabrication, functionalization techniques, and growth-controlled mechanisms. First, the history of nanomaterials is summarized and then the different classification methods, based on their dimensionality (0-3D), composition (carbon, inorganic, organic, and hybrids), origin (natural, incidental, engineered, bioinspired), crystal phase (single phase, multiphase), and dispersion state (dispersed or aggregated), are presented. Then, the synthesis methods are discussed and classified in function of the starting material (bottom-up and top-down), reaction phase (gas, plasma, liquid, and solid), and nature of the dispersing forces (mechanical, physical, chemical, physicochemical, and biological). Finally, the challenges in synthesizing nanomaterials for research and commercial use are highlighted.

Review on Natural, Incidental, Bioinspired, and Engineered Nanomaterials: History, Definitions, Classifications, Synthesis, Properties, Market, Toxicities, Risks, and Regulations.

Nanomaterials are becoming important materials in several fields and industries thanks to their very reduced size and shape-related features. Scientists think that nanoparticles and nanostructured materials originated during the Big Bang process from meteorites leading to the formation of the universe and Earth. Since 1990, the term nanotechnology became very popular due to advances in imaging technologies that paved the way to specific industrial applications. Currently, nanoparticles and nanostructured materials are synthesized on a large scale and are indispensable for many industries. This fact fosters and supports research in biochemistry, biophysics, and biochemical engineering applications. Recently, nanotechnology has been combined with other sciences to fabricate new forms of nanomaterials that could be used, for instance, for diagnostic tools, drug delivery systems, energy generation/storage, environmental remediation as well as agriculture and food processing. In contrast with traditional materials, specific features can be integrated into nanoparticles, nanostructures, and nanosystems by simply modifying their scale, shape, and composition. This article first summarizes the history of nanomaterials and nanotechnology. Followed by the progress that led to improved synthesis processes to produce different nanoparticles and nanostructures characterized by specific features. The content finally presents various origins and sources of nanomaterials, synthesis strategies, their toxicity, risks, regulations, and self-aggregation.

El ecosistema microbiano conjuntival: Condiciones ambientales del trópico y tolerancia de las lentes de contacto / The conjunctival microbial ecosystem: Tropical environmental conditions and contact lens tolerance

Los defectos refractivos son considerados la segunda causa de discapacidad visual a nivel mundial. Los trastornos de la visión como la miopía se pueden corregir mediante cirugía refractiva, anteojos o lentes de contacto. Se plantea que los cambios en el microbioma ocular provocados por el uso de lentes de contacto están relacionados con el desarrollo de complicaciones e infecciónes. La microbiota ocular puede variar según las condiciones estacionales, la temperatura, la edad, sexo y la exposición ambiental. Se expone el presente estudio para evaluar si la microbiota de los usuarios de lentes de contacto difería de la de quienes no los usaban, según diversos factores. Se realizó un estudio descriptivo, no experimental, transversal, en Ambato, Ecuador. La población de estudio estuvo conformada por participantes con edades entre 18 y 59 años. Se cuantificó la diversidad bacteriana por medio de la amplificación del genoma completo, del cual se secuenció la región V3 del gen 16S rRNA de 40 muestras en la plataforma secuenciadora. Se descubrió que el microbioma conjuntival de los usuarios de lentes de contacto no era significativamente diferente del de los NULC y no detectó un aumento significativo de microorganismos patógenos. Los principales taxones bacterianos fueron similares entre los grupos, aunque la abundancia de cada taxón varió dentro de cada grupo. Este tipo de estudios es fundamental para el éxito de la terapia ocular y el manejo de los microorganismos diana de la terapia antimicrobiana(AU)

Refractive errors are considered the second cause of visual impairment worldwide. Vision disorders such as nearsightedness can be corrected by refractive surgery, glasses, or contact lenses. It is proposed that the changes in the ocular microbiome caused by the use of contact lenses are related to the development of complications and infections. The ocular microbiota can vary according to seasonal conditions, temperature, age, gender and environmental exposure. The present study is set out to assess whether the microbiota of contact lens wearers differed from that of non-wearers, based on various factors. A descriptive, non-experimental, cross-sectional study was carried out from November 2021 to March 2022 in Ambato, Ecuador. The study population consisted of participants aged between 18 and 59 years. Bacterial diversity was quantified by amplification of the complete genome, from which the V3 region of the 16S rRNA gene of 40 samples was sequenced on the sequencing platform. The conjunctival microbiome of contact lens wearers was found to be not significantly different from the ones of NULCs and did not detect a significant increase in pathogenic microorganisms. The main bacterial taxa were similar between groups although the abundance of each taxon varied within each group. This type of study is essential for the success of ocular therapy and the management of the target microorganisms of antimicrobial therapy(AU)

La salud pública en contextos pluriculturales. Avances y retrocesos / Public health in pluricultural contexts. Advances and setbacks

La cultura constituye un complejo dinámico de conocimientos, creencias, conductas aprendidas y transmitidas por generaciones, a través del lenguaje y la vida cotidiana. El concepto de cultura se relaciona con el proceso salud-enfermedad puesto que el bienestar social, espiritual, psicológico y biológico de individuos y comunidades es expresión del medio ambiente, estilo de vida, vivienda, alimentación, educación y acceso adecuado a bienes y servicios. En el campo de salud se identifican la medicina tradicional desarrollada por pueblos indígenas; la medicina popular basada en creencias de la familia y la comunidad y la medicina profesional, basada en el estudio científico. La medicina indígena se caracteriza por la atención holística del sujeto, asequibilidad y acceso en poblaciones donde los sistemas de salud oficiales no tienen presencia, no obstante, presenta bajo reconocimiento por parte de los gobiernos. Con el presente estudio se pretende reflexionar acerca de la importancia de fomentar la interculturalidad en salud con base en las necesidades, organización y visión del mundo de los pueblos indígenas a partir del enfoque intercultural. Se expone una panorámica que aborda con mirada actual, las particularidades de la interculturalidad y la multiculturalidad en el contexto pluricultural, que contribuye a un mejor entendimiento de la necesidad de redimensionamiento de los sistemas de salud a partir de los elementos que aporta el enfoque intercultural como modelo de franca concepción humanista, en contraposición con el modelo hegemónico de salud actual, que favorece las desigualdades en salud(AU)

Culture constitutes a dynamic complex of knowledge, beliefs, behaviors learned and transmitted through generations, through language and everyday life. The concept of culture is related to the health-disease process since the social, spiritual, psychological and biological well-being of individuals and communities is an expression of the environment, lifestyle, housing, food, education and adequate access to goods and services. In the field of health, traditional medicine developed by indigenous peoples is identified; folk medicine based on family and community beliefs; and professional medicine, based on scientific study. Indigenous medicine is characterized by the holistic care of the subject, affordability and access in populations where the official health systems do not have a presence, however, it is under recognition by governments. This study aims to reflect on the importance of promoting interculturality in health based on the needs, organization and worldview of indigenous peoples from the intercultural approach. A panorama is presented that addresses with a current perspective, the particularities of interculturality and multiculturalism in the multicultural context, which contributes to a better understanding of the need to resize health systems based on the elements provided by the intercultural approach such as model of frank humanist conception, in contrast to the current hegemonic model of health, which favors inequalities in health(AU)

Tratamiento no exitoso de tuberculosis en reclusos ecuatorianos: hacinamiento y otros factores asociados / Unsuccessful treatment tuberculosis in ecuadorian prisoners: overcrowding and other factors associated

La tuberculosis es uno de los principales contribuyentes a la carga mundial de morbilidad y ha recibido una atención considerable en los últimos años, especialmente en los países de ingresos bajos y medianos, donde está estrechamente asociada con el VIH / SIDA. El entorno penitenciario se ha citado a menudo como un posible reservorio de tuberculosis. La mala adherencia al tratamiento es común a pesar de diversas intervenciones destinadas a mejorar la finalización del tratamiento. Se realizó un estudio transversal, retrospectivo y descriptivo entre internos de dos centros penitenciarios, analizando el diagnóstico de TB, la comorbilidad TB-VIH y la finalización del tratamiento a partir de los registros nacionales. Se probó la significación de los factores de riesgo mediante análisis bivariado. Se consideró un valor de p <0,05 como estadísticamente significativo. Se observó una asociación significativa entre la TB y grupo etario (p=0,0032), tratamiento no exitoso (p=0,0093) y coinfección TB/VIH (p<0,001). Factores de riesgo asociados como el VIH y el tratamiento no exitoso resaltan la necesidad de revisar las estrategias de tratamiento con un enfoque interinstitucional(AU)

Tuberculosis is a major contributor to the global burden of disease and has received considerable attention in recent years, particularly in low- and iddle-income countries where it is closely associated with HIV/AIDS. The prison setting has been often cited as a possible reservoir of tuberculosis.Poor adherence to treatment is common despite various interventions aimed at improving treatment completion. A cross-sectional, retrospective and descriptive study was carried out among inmates of two prisons.We analyzed the diagnosis of TB, the TB-HIV comorbidity and the completion of the treatment from the national registries. The risk factors were tested for significance using bivariate analysis. P-value <0.05 was considered statistically significant. A significant association was observed between TB and history of abortion (p=0,0032), unsuccessfully treated (p=0,0093) and TB/HIV coinfection (p<0,001). Associated risk factors such as HIV, and drugs, and being indigenous highlight the need to revise the treatment strategies with an inter-institutional approach(AU)

Desarrollo tecnológico e introducción del inyectable succinilcolina 50 mg/mL en el cuadro básico de medicamentos nacional de Cuba / Technological development and introduction of the injectable succinylcholine 50 mg/mL in the basic table of national medicines of Cuba / Desenvolvimento tecnológico e introdução da succinilcolina injetável 50 mg/mL na mesa da medicina básica de Cuba

RESUMEN Introducción: El inyectable succinilcolina 50 mg/mL se utiliza para intubaciones traqueales rápidas. Objetivo: Desarrollar e introducir el inyectable succinilcolina 50 mg/mL en el cuadro básico de medicamentos. Tres variantes de formulación fueron diseñadas: dos con preservantes antimicrobianos y presentación (bulbos 6R y 10R) y una sin preservantes (bulbos 6R). Metodología: Se validaron los métodos empleados para el control de calidad y estabilidad. A los lotes elaborados a escala de laboratorio, piloto e industrial con la fórmula seleccionada se les realizó estudio de estabilidad acelerada y vida útil. Las variantes diseñadas evidenciaron adecuada calidad, la no preservada fue seleccionada para realizar lotes a diferentes escalas. Las técnicas cromatográficas empleadas para la cuantificación de la succinilcolina cumplieron con los criterios de validación establecidos. Resultados: Se demostró el desempeño de las pruebas de esterilidad y ensayo de endotoxinas bacterianas. El producto en estudio de estabilidad indicó un adecuado comportamiento físico, químico y micro-biológico durante el período evaluado. Se comprobó la factibilidad del desarrollo tecnológico, con la fórmula seleccionada para el inyectable succinilcolina 50 mg/mL. Se introdujo el inyectable en el cuadro básico de medicamentos nacional.

SUMMARY Introduction: The injectable succinylcholine 50 mg/mL is used for rapid tracheal intubations. Aim: To develop and introduce the injectable succinylcholine 50 mg/mL into the basic drug table. Three formulation variants were designed: two with antimicrobial and presentation preservatives (6R and 10R bulbs) and one unpreserved (6R bulbs). Methodology: The methods used for quality control and stability were validated. Laboratory, pilot and industrial-scale batches with the selected formula were studied for accelerated stability and service life. The designed variants showed adequate quality, selecting the non-preserved, to make batches at different scales. Chromatographic techniques used for the quantification of succinylcholine met established validation criteria. Results: The performance of sterility tests and bacterial endotoxin testing was demonstrated. The product under stability study indicated adequate physical and chemical behavior during the period evaluated. The feasibility of technological development was verified, with the formula selected for the injectable succinylcholine 50 mg/mL. Injectable was introduced in the national medicines basic table.

RESUMO Introdução: A succinilcolina injetável 50 mg/mL é utilizada para intubações traqueais rápidas. Objetivo: Desenvolver e introduzir a succinilcolina injetável 50 mg/mL na tabela básica de medicamentos. Três variantes de formulação foram projetadas: duas com conservantes antimicrobianos e apresentação (lâmpadas 6R e 10R) e uma sem conservantes (lâmpadas 6R). Metodologia: Foram validados os métodos utilizados para o controle de qualidade e estabilidade. Estudos acelerados de estabilidade e vida de prateleira foram realizados nos lotes produzidos em escala laboratorial, piloto e industrial com a fórmula selecionada. As variantes projetadas apresentaram qualidade adequada, a não preservada foi selecionada para a realização de lotes em diferentes escalas. As técnicas cromatográficas utilizadas para a quantificação da succinilcolina atenderam aos critérios de validação estabelecidos. Resultados: Foi demonstrado o desempenho dos testes de esterilidade e do ensaio de endotoxinas bacterianas. O produto em estudo de estabilidade indicou comportamento físico, químico e microbiológico adequado durante o período avaliado. Foi verificada a viabilidade do desenvolvimento tecnológico, com a fórmula selecionada para a succinilcolina injetável 50 mg/mL. O injetável foi introduzido na tabela nacional de medicamentos básicos.

Política terapéutica de la coinfección por M. tuberculosis y el VIH / Therapeutic policy of coinfection by M. tuberculosis and HIV

La tuberculosis (TB) es la infección oportunista más frecuente en pacientes infectados por el VIH, con impactos bidireccionales en el paciente: al aumentar la carga viral, la TB acelera la progresión de la infección por VIH a SIDA y, con ello, a la muerte. A su vez, El VIH dificulta el diagnóstico y tratamiento de la TB y favorece el desarrollo de diversas complicaciones clínicas. Al considerar que (1) sólo las dos terceras partes de la población seropositiva en el mundo tienen acceso a terapia antiretroviral; que (2) la tercera parte de fallecidos por SIDA en 2019 estaban también diagnosticados con TB; que (3) a nivel global el riesgo de morir por TB se duplica en el individuo con diagnóstivo de VIH positivo; y que (4) en las Américas, únicamente el 61% de las personas con TB-VIH reciben tratamiento antiretroviral, dejando tres veces más muertes y dos veces más pérdida en el seguimiento en los coinfectados, se evidencia una realidad preocupante sobre los resultados de las actuales políticas de tratamiento para la coinfección TB-VIH, haciendo necesario explorar sus bases, alcance, y metodologías en América y en Ecuador(AU)

Tuberculosis (TB) is the most frequent opportunistic infection in HIV-infected patients, with two-way impacts on the patient: by increasing the viral load, TB accelerates the progression from HIV infection to AIDS and, with it, to the death. In turn, HIV makes the diagnosis and treatment of TB difficult and favors the development of various clinical complications. Considering that (1) only two thirds of the HIV-positive population in the world have access to antiretroviral therapy; that (2) a third of those who died from AIDS in 2019 were also diagnosed with TB; that (3) globally, the risk of dying from TB is doubled in the individual with a positive HIV diagnosis; and that (4) in the Americas, only 61% of people with TB-HIV receive antiretroviral treatment, leaving three times more deaths and two times more loss to follow-up in those who are coinfected, there is a worrying reality about the results of current treatment policies for TB-HIV coinfection, making it necessary to explore its bases, scope, and methodologies in America and Ecuador(AU)

Ascaris lumbricoides, causa de la colecistitis aguda en el servicio de emergencia del Hospital "Alfredo Noboa Montenegro", 2018 / Ascaris lumbricoides, cause of acute cholecystitis in the emergency service of the "Alfredo Noboa Montenegro" Hospital, 2018

Ascaris lumbricoides provoca una de las helmintiasis más frecuentes en los países tropicales, pudiendo producir efectos patológicos en cualquier parte del organismo, siendo los conductos biliales uno de los sitios recurrentes provocando una colecistitis aguda. La CA es una de las principales causas de ingreso al servicio de Emergencia, es una inflamación de la vesícula cuyo diagnóstico oportuno es de vital importancia para la prevención de complicaciones. Por tal razón, determinar la frecuencia de las variables clínicas, de laboratorio y ecográficas, su relación con las comorbilidades asociadas a las características demográficas de los pacientes y el nivel de severidad de la colecistitis aguda causada por la A. lumbricoides de las Guías de Tokio 2018 del Servicio de Emergencia del Hospital Alfredo Noboa Montenegro durante el periodo junio - diciembre 2018, para la elaboración de un esquema diagnóstico. La metodología de investigación fue cuantitativa descriptiva de corte transversal. Dentro de los principales hallazgos, el CA aparece con prevalencia en el género femenino en un 69,41%, promedio de edad de 32 a 45 años, el 10% de 170 pacientes presentaron en su ecografía una forma parasitaria compatible con A. Lumbricoides, los resultados clínicos arrojaron presencia de dolor (67,34%), fiebre (68,65%), náuseas (45,93%); en los laboratorio la Proteína C Reactiva estuvo aumenta en el 94,18% de los casos, en imagenología se refleja presencia de líquido pericolecistico en un 78,82% y un engrosamiento de pared vesicular en un 34,12%. El nivel de severidad registrado según los criterios de las guías de Tokio 2018 fue grado I 35,3%, grado II 47,1% y grado III 17,6%. Se recomienda la estructuración de un esquema diagnóstico oportuno de colecistitis aguda causada por A. Lumbricoides(AU)

Ascaris lumbricoides causes one of the most frequent helminthiases in tropical countries, being able to produce pathological effects in any part of the body, being the bile ducts one of the recurrent sites causing acute cholecystitis. AC is one of the main causes of admission to the Emergency service, it is an inflammation of the gallbladder whose timely diagnosis is of vital importance for the prevention of complications. signs and symptoms, the timely diagnosis is of vital importance for the prevention of complications. For this reason, determine the frequency of clinical, laboratory and ultrasound variables, their relationship with the comorbidities associated with the demographic characteristics of the patients and the level of severity of acute cholecystitis cause of A. lumbricoides of the Tokyo Guidelines 2018 of the Hospital Emergency Service Alfredo Noboa Montenegro during the period June - December 2018, for the elaboration of a diagnostic scheme. The research methodology was quantitative cross-sectional descriptive. Among the main findings that were prevailed in the female gender in 69,41%, average age from 32 to 45 years, 10% of 170 patients presented in their ultrasound a parasitic form compatible with A. lumbricoides, clinical results that prevailed was presence of pain (67.34%), fever (68.65%), nausea (45.93%); in the laboratory findings the C Reactive Protein was increased in 94,18% of cases, in imaging the presence of pericolecist fluid is reflected in 78,82% and a thickening of the vesicular wall in 34,12%. The severity level recorded according to the criteria of the Tokyo 2018 guidelines was grade I 43,53%, grade II 48,24% and grade III 8,24%. The structuring of a timely diagnostic scheme for acute cholecystitis cause of A. lumbricoides is recommended(AU)

Predictores de conductas alimentarias de riesgo en estudiantes de bachillerato / Predictors of risk eating behaviors in high school students

Resumen El objetivo principal de este estudio fue identificar variables sociodemográficas y psicosociales capaces de predecir las conductas alimentarias de riesgo (CAR) en estudiantes de bachillerato. Participaron 988 adolescentes (541 mujeres y 447 hombres) de entre 14 y 18 años de edad (M = 16.79, DE = 1.50). Además de las CAR (Atracón-purga, Medidas compensatorias y Restricción), examinadas a través del Cuestionario Breve de Conductas Alimentarias de Riesgo, fueron evaluadas las variables psicosociales siguientes: apoyo familiar y de amigos, ajuste escolar, victimización, ideación suicida, estrés académico, insatisfacción corporal y depresión; finalmente, las variables sociodemográficas incluidas fueron: sexo, edad, horas de sueño al día y horas dedicadas al Internet o las redes sociales. Mediante tres análisis de regresión lineal múltiple, uno para cada CAR (R2 = .36, .16 y .55, respectivamente; todas con p < .001), se pudieron identificar distintas variables predictivas, entre las que destacaron la insatisfacción corporal, la depresión y el sexo (mujeres). La identificación de estas variables puede contribuir a la mejora de las estrategias de prevención en materia de CAR y, por ende, de los trastornos alimentarios entre adolescentes.

Abstract The main objective of this study was to identify sociodemographic and psychosocial variables capable of predicting risk eating behaviors (REB) in high school students. Participants were 988 adolescents (541 women and 447 men) between 14 and 18 years of age (M = 16.79, SD = 1.50). In addition to the REB (Binge-purge, Compensatory behavior and Restriction), examined through the Brief Questionnaire on Risk Food Behaviors, the following psychosocial variables were also evaluated: family and friend support, school adjustment, victimization, suicidal ideation, academic stress, body dissatisfaction and depression; finally, the sociodemographic variables included were: sex, age, hours of sleep per day and hours dedicated to the Internet or social networks. Through three multiple linear regression analyzes, one for each REB (R2 = .36, .16 and .55, respectively; all with p < .001), different predictive variables could be identified, among which stood out the body dissatisfaction, the depression and sex (women). The identification of these variables can contribute to the improvement of prevention strategies in terms of REB and eating disorders among adolescents.

Articulación entre teoría y práctica desde aprendizaje significativo en el campo de enfermería / Articulation between theory and practice from meaningful learning in the nursing field

Introdución: mediante el aprendizaje los seres vivos adquieren conocimientos sobre el mundo que los rodea, debido a que ciertas áreas cerebrales son capaces de crear redes neuronales. El aprendizaje significativo parte de las experiencias adquiridas y los conocimientos previos, considerado como la forma más completa de aprender, por lo tanto, dentro del área de la salud se requiere problematizar los procesos educativos en la generación de aprendizajes significativos. Objetivo: describir la relación entre los cuidados de enfermería y la importancia de la educación continua entre el profesional mediante el aprendizaje significativo. Material y métodos: se realizó una búsqueda en bases de datos como EBSCO, PubMed y SciELO, las palabras clave empleadas fueron: aprendizaje significativo, conocimiento, enfermería y cuidados, en donde se encontrará la asociación del aprendizaje significativo con relación a los cuidados de enfermería. Conclusión: los cuidados de enfermería y la formación de los profesionales están mediados por la construcción de conocimientos con base a experiencias previas, es decir de lo que se ha aprendido a lo largo de su formación académica, lo cual le permite ejecutar un pensamiento crítico con un aprendizaje autodirigido.

Screening for intestinal parasites in adults from three different regions of Colombia / Tamizaje de parásitos intestinales en adultos de tres regiones de Colombia

Intestinal parasitosis (IP) is a public health problem in developing countries affecting one fourth of the global population. IP are common studied in children, ne glecting the adults that are also at high risk and source of transmission. A screening study was performed with a convenience sample in three Colombian regions: Guachené (Cauca), Quibdó (Chocó), and Urabá (Antioquia). Feces samples from 284 volunteers (older than 18 years old) were tested by microscopy to identify para site ova and cysts. The IP frequency was 14.5%, and 52.1% were males. 63.2% of the parasitized patients exhibited diarrhea, and/or abdominal pain with significant association. 39.5% had single parasitic infection and 60.5% had multiple parasites: Blastocystis hominis (63.9%), Entamoeba hystolitica/dispar (39.4%), Endolimax nana (33.3%), Ascaris lumbricoides (22.2%), Giardia lamblia (19.4%), Entamoeba coli (13.9%), Trichuris trichiura (11.1%), hookworm species (11.1%), Strongyloides stercolaris (5.6%), and Iodamoeba butschlii (2.8%). A multivariate approach was used to determine predictor factors for IP: male gender, rainwater as drinking sour ce, and feces disposal different to toilet, latrine or septic tank were positively associated with infection. This study evidences that adult population, not only children from vulnerable areas of Colombia, must have to include as a risk for intestinal parasitism.

La parasitosis intestinal (PI) es un problema de salud pública en países en desarrollo que afecta un cuarto de la población mundial. Las PI son comúnmente estudia das en niños, olvidando que los adultos están también en riesgo y a su vez pueden ser fuentes de transmisión. Se realizó un estudio de tamizaje con una muestra escogida por conveniencia en tres regiones de Colombia: Guachené (Cauca), Quibdó (Chocó) y Urabá (Antioquia). Las muestras de materia fecal de 284 voluntarios mayores de 18 años, fueron estudiadas por microscopía para identificar parásitos, huevos y quistes. La frecuencia de las PI fue del 14.5%, 52.1% de los positivos fueron hombres. 63.2% de los individuos parasitados tenían asociación significativa con diarrea, y/o dolor abdominal. 39.5% tuvieron infección por un solo parásito y 60.5% fueron positivos para varios parásitos: Blastocystis hominis (63.9%), Entamoeba hystolitica/dispar (39.4%), Endolimax nana (33.3%), Ascaris lumbricoides (22.2%), Giardia lamblia (19.4%), Entamoeba coli (13.9%), Trichuris trichiura (11.1%), Strongyloides stercolaris (5.6%), y Iodamoeba butschlii (2.8%). Se realizó un aná lisis multivariado para determinar factores predictores para PI: el género masculino, el agua lluvia para consumo, y la disposición de excretas diferente a sanitario, letrina o pozo séptico, están asociados positivamente a la PI. Este estudio evidencia que la población adulta, no solo la infantil, residentes en áreas vulnerables de Colombia, deben incluirse como población de riesgo al parasitismo intestinal.

Structural and Optical Properties Correlated with the Morphology of Gold Nanoparticles Embedded in Synthetic Sapphire: A Microscopy Study.

This work reports on the electron microscopy analysis of the structure and morphology of gold nanoparticles produced by ion implantation as well as their relationship to their optical properties. Metalic nanoparticles by ion implantation are usually spherical and formed beneath the surface of a dielectric matrix. In this experiment, the matrix was sapphire. After high-energy Si ion irradiation, the gold nanoparticles were elongated into prolate spheroids. Since the nanoparticles are embedded in a dielectric matrix, secondary electron imaging in a JEOL JSM-7800F at low voltage did not allow their analysis. This work proposes an analysis using backscattered electron imaging in a field emission scanning electron microscopy at higher voltages (20 kV) to explore the morphology of the embedded nanoparticles. The samples were observed by cross-sectional view as well as a top view of the surface of the sapphire matrix for exploration and recognition of their morphology, dimensions, distribution, and composition. The analysis was extended by means of Rutherford backscattering spectrometry, X-ray diffraction, and optical extinction spectroscopy. The nanoparticles exhibited structural and optical properties correlated directly to the morphology observed by microscopy. The beam interaction with the sample and the used parameters was simulated in the CASINO code, from which the depth of exploration with distinct parameters used in microscopy analysis was estimated.

Construcción y Validación de una Escala de Actitudes hacia el Narcotráfico en Estudiantes del Estado de Jalisco / Construction and Validation of a Scale of Attitudes toward Drug Trafficking in Students from the State of Jalisco

Resumen El presente trabajo de investigación tuvo como objetivo construir un instrumento de medida para conocer las actitudes hacia el narcotráfico de estudiantes universitarios y de bachillerato. El instrumento se denominó "Escala de Actitudes hacia el Narcotráfico" y fueron evaluadas sus propiedades psicométricas de validez y confiabilidad a través de un análisis factorial exploratorio y confirmatorio. La muestra estuvo integrada por 2356 estudiantes de ambos niveles educativos. Al finalizar la validación, el instrumento quedó conformado por 17 reactivos y tres factores relacionados: "Rechazo al narcotráfico y los narcotraficantes", "Apoyo al narcotráfico y los narcotraficantes" y "Predisposición de pertenencia al narcotráfico e identificación con la narcocultura", mostrando propiedades psicométricas satisfactorias (α=867). En general, los estudiantes muestran actitudes negativas hacia el narcotráfico, con diferencias según el sexo y el nivel educativo, siendo los hombres y los bachilleres quienes mantienen menor grado de rechazo. Se recomienda aplicar la escala en otras poblaciones y contextos tanto para confirmar las propiedades sus psicométricas como para identificar el rechazo, la aceptación y la predisposición de pertenencia de los individuos hacia dicha actividad y particularmente, para identificar su asociación con otras variables de interés psicosocial.

Abstract The objective of this research work was to build a measurement instrument to know the attitudes toward drug trafficking of university and high school students. The instrument was called the "Scale of Attitudes towards Drug Trafficking" and its psychometric properties of validity and consistency were evaluated through an exploratory and confirmatory factorial analysis. The sample consisted of 2356 students of both educational levels. At the end of the validation process, the instrument was made up of 17 items and three related factors: "Rejection of drug trafficking and drug traffickers", "Support for drug trafficking and drug traffickers" and "Predisposition of belonging to drug trafficking and identification with narcoculture", showing satisfactory psychometric properties (α = 867). In general, students show negative attitudes toward drug trafficking, with differences according to sex and educational level. The men and the high school students maintain lower level of rejection. It is recommended to apply the scale in other populations and contexts to confirm their psychometric properties and identify the rejection, acceptance and predisposition of belonging to drug trafficking, as well as to identify their association with other psychosocial variables of interest.

Nocardia cyriacigeorgica threatening an immunocompetent host; a rare case of paramediastinal abscess.

We describe a rare case of anterior paramediastnial abscess due to Nocardia cyriacigeorgica in an immunocompetent patient without pre-existing lung disease. High suspicious should be taken in those patients that failed to improve after first course of antibiotic therapy. Similarly, when suspected, isolation is crucial because of the variation in antibiotic susceptibilities among Nocardia spp. in order to provide adequate therapy to reduce associated comorbidities and mortality rate.

Correlation and agreement between depressive symptoms in children and their parent's perception / Correlación y concordancia entre síntomas depresivos en niños y su percepción por los padres

ABSTRACT: Introduction: Childhood depression is a disease that is becoming more frequent. Few reports address parental perception of children depressive symptoms, and these studies have not been carried out in community samples. Objective: To evaluate the correlation and agreement of depressive symptoms in school-age children, and their parent's perception about emotional and conduct abnormalities. Method: A transversal study was performed in 284 children who filled a Children Depression Inventory. One of their parents filled a Strengths and Difficulty Questionnaire, and correlation between scores and subcomponent scores were assessed. Agreement between presence of depressive symptoms in children and their parent's perception of abnormal emotional and/or conduct reports was also obtained. Results: 47 children were identified with depressive symptoms. We found moderate correlation between scores. We did not find agreement between the presence of depressive symptoms in the children and the report of emotional and conduct abnormalities by parents. Discussion and conclusion: There is a modest correlation between depressive symptom severity and parental perception of abnormal emotions and/or behaviors. We found no evidence of agreement between these domains in our study, which suggests that parents fail to perceive negative emotions or conducts as depressive symptoms in their children. Parental reports should be addressed by healthcare workers, and their emotional significance should be interpreted. An intentional search of depressive symptomatology in children should be a priority.

RESUMEN: Introducción: La prevalencia de la depresión infantil está al alza. Pocos estudios han evaluado la percepción parental de los síntomas depresivos en niños, y los que se han realizado no han sido replicados en la comunidad. Objetivo: Evaluar la correlación y la concordancia entre los síntomas depresivos en niños de edad escolar con la percepción de sus padres sobre problemas emocionales y conductas anormales. Método: Se realizó un estudio transversal en 284 niños que contestaron el Inventario de Depresión Infantil y se compararon los puntajes con el Cuestionario de Fortalezas y Dificultades que llenó uno de los padres. Se evaluó la correlación entre los puntajes totales y por sub-escalas, así como la concordancia entre la presencia de puntajes sugestivos de depresión infantil y la percepción parental de emociones y conductas anormales. Resultados: 47 niños fueron identificados con puntajes indicativos de sintomatología depresiva. Encontramos correlación moderada entre los puntajes de las escalas. No encontramos concordancia entre la presencia de síntomas depresivos y el reporte parental de emociones o conductas anormales. Discusión y conclusión: Existe correlación entre la severidad de los síntomas depresivos y la percepción parental de emociones y conductas anormales. No encontramos concordancia entre ambas mediciones, lo cual sugiere que los padres fallan al identificar las conductas y emociones anormales de sus hijos como los síntomas depresivos. Los reportes de los padres deben ser tomados en cuenta y ser interpretados por el personal de salud. La búsqueda intencionada de síntomas depresivos en niños debe ser parte fundamental del proceso de cuidado de esta población.

Determinantes de la subestimación de la percepción de los padres sobre el peso de sus hijos en hogares infantiles del ICBF de Floridablanca, Colombia, 2012 / Determinants of underestimation of parents' perceptions of their child's weight in children's homes belonging to ICBF from Floridablanca, Colombia, 2012

Objective: To identify the factors determining the underestimation of the actual weight of the children by the father and mother of preschooler users of Children's homes (CH) of the Colombian Family Welfare Institute located in the municipality of Floridablanca, Colombia. Subjects and Methods: A cross-sectional study was done in a random sample of 186 preschool children aged 3-6 years from 7 Floridablanca's CH. Researchers interviewed parents and measured weight and height of children, parents, and caregivers. The analysis was conducted by way of single and multiple binomial regression models. Results: Underestimating the weight of the children was 44.6%, 46.3%, 45% and 44.2% for the mother, father, grandparents and uncles, respectively. The underestimation was associated with the child' sex (mother: 1.59 95% CI 1.11-2.29 RP; father: PR2.00 95% CI 1.1-3.6), education (PR 1.42 95 1.05-1.92%), occupation (PR 1.05 95% CI 1.05-1.05) and obesity's history in the mother (PR 1.51 95% CI 1.10-2.08) and the current weight of the father (PR 2.31 95% CI 1.1 to 5.0). Conclusions: A high proportion of families of children do not perceive overweight and obesity. Issues such as the child's sex, occupation and education of the mother and obesity in both parents must be considered when we will educate parents on the recognition of obesity as a public health problem.

Objetivo: Identificar los factores determinantes de la subestimación del peso real de los niños por parte del padre y la madre de preescolares usuarios del programa de Hogares Infantiles (HI) del Instituto Colombiano de Bienestar Familiar (ICBF) localizados en el municipio de Floridablanca, Colombia. Sujetos y métodos. Se realizó un estudio de corte transversal en una muestra aleatoria de 186 preescolares de 3 a 6 años de 7 HI de Floridablanca. Se entrevistaron a los padres o cuidadores y se midió la talla de los niños, padres y cuidadores. El análisis se realizó mediante modelos de regresión binomial simple y múltiple. Resultados: La subestimación del peso de los niños fue de 44,6 %, 46,3 % 45 %, y 44,2 % para la madre, el padre, los abuelos y los tíos, respectivamente. La subestimación se asoció al sexo del niño (madre: RP 1,59 IC95 % 1,11-2,29; padre: RP 2,00 IC95 % 1,1-3,6), la escolaridad (RP 1,42 IC95% 1,05-1,92), ocupación (1,05 IC95 % 1,05-1,05) y antecedentes de obesidad de la madre (RP 1,51 IC95% 1,102,08) y con el peso actual del padre (RP 2,31 IC95% 1,1-5,0). Conclusiones: El sobrepeso y la obesidad no son percibidos por un elevado porcentaje de familiares de los niños. Aspectos como el sexo del niño, la ocupación y escolaridad de la madre y obesidad en ambos padres deben considerarse al momento de educar a los padres sobre el reconocimiento de la obesidad como un problema en salud pública.

Large area films of alternating graphene-carbon nanotube layers processed in water.

We report the preparation of hybrid paperlike films consisting of alternating layers of graphene (or graphene oxide) and different types of multiwalled carbon nanotubes (N-doped MWNTs, B-doped MWNTs, and pristine MWNTs). We used an efficient self-assembly method in which nanotubes were functionalized with cationic polyelectrolytes in order to make them dispersible in water, and subsequently these suspensions were mixed with graphene oxide (GO) suspensions, and the films were formed by casting/evaporation processes. The electronic properties of these films (as produced and thermally reduced) were characterized, and we found electrical resistivities as low as 3 × 10(-4) Ω cm. Furthermore, we observed that these films could be used as electron field emission sources with extraordinary efficiencies; threshold electric field of ca. 0.55 V/µm, ß factor as high as of 15.19 × 10(3), and operating currents up to 220 µA. These values are significantly enhanced when compared to previous reports in the literature for other carbon nanostructured filmlike materials. We believe these hybrid foils could find other applications as scaffolds for tissue regeneration, thermal and conducting papers, and laminate composites with epoxy resins.