ABSTRACT
INTRODUCCION: en América Latina y el Caribe, tanto los trastornos de ansiedad como el Trastorno ObsesivoCompulsivo (TOC) se ocupan como algunos de los trastornos mentales más comunes. En Paraguay se ha estudiado a ambos trastornos de manera individual, más no así en correlación. OBJETIVO: determinar la correlación de las dimensiones del trastorno obsesivo-compulsivo con los factores de ansiedad de estudiantes universitarios de medicina de la Universidad Nacional de Asunción en el año 2019. MATERIAL Y MÉTODO: estudio cuantitativo, diseño correlacional - descriptivo, muestreo no probabilístico por conveniencia en cadena, desde abril hasta mayo del 2019, en la Facultad de Ciencias Médicas (sede Sajonia). Universo conformado por N=450 estudiantes y muestra necesaria de n=201. Se aplicó el Inventario Obsesivo Compulsivo -Revisado (OCI-R) y el Inventario De Ansiedad Estado -Rasgo (STAIC). RESULTADOS: se analizaron 208 encuestas,. donde se pudo determinar una Edad media de 20,875±1,76 años; la mayoría de los encuestados corresponden al sexo femenino. Se encontró una correlación (r=0,431) significativa (p<0,05) entre el TOC y ansiedad de estudiantes de medicina. CONCLUSIÓN: en la presente investigación se determinó una correlación positiva para las dimensiones del trastorno obsesivo-compulsivo y los factores de la ansiedad; se indica que el aumento cuantitativo en el puntaje de dichas dimensiones se acompaña con un aumento en los factores de la ansiedad.
BACKGROUND: in Latin America and the Caribbean, both anxiety disorders and Obsessive-Compulsive Disorder (OCD) are among the most common mental disorders. In Paraguay, both disorders have been studied, but not in correlation. OBJECTIVE: to determine the correlation of the dimensions of obsessive-compulsive disorder with anxiety factors in undergraduate medical students of the National University of Asuncion in 2019. METHODS: quantitative study, correlational-descriptive design, non-probabilistic chain convenience sampling, from April to May 2019, at the Faculty of Medical Sciences (Saxony campus). Universe made up of N=450 students and necessary sample of n=201. The Obsessive Compulsive Inventory-Revised (OCI-R) and the StateTrait Anxiety Inventory (STAIC) were applied. RESULTS: 208 surveys were analyzed. Mean age was 20.875±1.76 years. The majority of respondents were female. A significant correlation (r=0.431) (p<0.05) was found between OCD and Anxiety in medical students. CONCLUSION: in the present investigation a positive correlation was determined for the dimensions of obsessive-compulsive disorder and anxiety factors; it is indicated that the quantitative increase in the score of these dimensions is accompanied by an increase in anxiety factors.
Subject(s)
Female , Adult , Anxiety , Students , Mental Disorders , Obsessive-Compulsive DisorderABSTRACT
Bismuth-based semiconductors are promising candidates for applications in photocatalysis, photodetection, solar cells, etc. BiSI in particular is attracting attention. It has anisotropic optoelectronic properties and comprises relatively abundant elements. However, the synthesis of this ternary compound presents several challenges. Here, we delve into the underlying chemical processes that lead to the crystal growth of BiSI nanorods and optimize a solution-based synthesis. The mechanism of formation of BiSI nanocrystals is the self-sacrifice of Bi2S3 nanostructures, which also act as templates. The crystallographic similarities between the chalcogenide and the chalcohalide allow for the solid state transformation from one to the other. However, there is also a synergy with the I3- species formed in the reaction media needed to obtain BiSI. Our method makes use of a green solvent, avoids complicated media, and drastically reduces the reaction time compared to other methods. The obtained nanorods present a band gap of 1.6 eV, in accordance with the reported values. This work presents insight into the chemistry of bismuth-based semiconductors, while introducing an easy, green, and scalable synthesis of a promising material, which could also be applied to similar compounds and other chalcoiodides, such as SbSI. In addition, the optical properties of the BiSI nanorods show their potential in photovoltaic applications.
ABSTRACT
The present work aimed to study the properties of a novel nanocomposite with promising biomedical applications. Nanocomposites were prepared by the addition of different concentrations of chitosan decorated carbon nanotubes to acrylamide-co-acrylic acid hydrogels. The nanocomposites chemical structure was characterized by Fourier Transform Infrared Spectroscopy (FT-IR). The FT-IR shows the typical bands due to the hydrogel and additionally the peaks at 1750â¯cm-1 and 1450â¯cm-1 that correspond to the carbon nanotubes incorporated into the polymer matrix. Mechanical properties and swelling measurements in different buffer solutions were also performed. The nanocomposites showed improved mechanical properties and a stronger pH-response. In order to evaluate antimicrobial activity, the growth and adhesion of Staphylococcus aureus to nanocomposites were studied. Cytocompatibility was also evaluated by MTT assay on MDCK and 3T3 cell lines. The nanocomposites were found to be cytocompatible and showed a reduced bacterial colonization.
Subject(s)
Anti-Bacterial Agents/chemistry , Chitosan/chemistry , Hydrogels/chemistry , Nanocomposites/chemistry , Nanotubes, Carbon/chemistry , Animals , Anti-Bacterial Agents/adverse effects , Biocompatible Materials/chemistry , Cell Line , Dogs , Hydrogen-Ion Concentration , Mice , Spectroscopy, Fourier Transform InfraredABSTRACT
Los tumores cerebrales son la segunda causa de neoplasias malignas en niños y los sarcomas primarios en el sistema nervioso central son extremadamente raros. Por esta razón, presentamos los resultados del estudio de un caso en una menor de edad y la revisión realizada sobre la fisiopatología, manifestaciones clínicas y hallazgos en las imágenes de resonancia magnética cerebral de esta patología. Se trata de una niña de 7 años de edad que ingresa al servicio de urgencias con cefalea, sintomatología sugerente de hipertensión endocraneana y disminución de la fuerza del hemicuerpo derecho, por lo que se le practica resonancia magnética cerebral (RM) con medio de contraste, con hallazgo de masa extraaxial temporoparietal izquierda, que desplaza la línea media. La paciente es valorada por neurocirugía y remitida a craneotomía frontoparietal izquierda, con resección completa del tumor. El informe de patología muestra sarcoma fusocelular de alto grado, compatible con histiocitoma fibroso maligno.
Brain tumours are the second cause of malignant neoplasms in children while primary sarcomas in the central nervous system (SNC), are extremely rare. For this reason, we present the results of the study of a case of a girl and revision on the pathophysiology, clinical manifestations, and findings on brain MRI of this pathology. We report the case of a sevenyear- old patient admitted to the emergency department with headache and symptoms suggestive of intracranial hypertension, and decreased strength of the right side of the body. In brain MRI, we found a left temporoparietal extra-axial mass, displacing the midline. The patient was examined by the neurosurgeon who performed a left frontoparietal craniotomy, with complete tumor resection. The pathology study showed high-grade spindle cell sarcoma, classified as malignant fibrous histiocytoma.
