ABSTRACT Objective: To assess the relationship of ɑ and ß angles of maxillary impacted canines with maxillary lateral incisor root resorption. Material and Methods: For this, 40 patients (between 11 and 45 years) with impacted maxillary canines presenting to a private orthodontic clinic were evaluated.20% of the cases were male and 80% were female. The ɑ and ß angles were measured on panoramic radiographs to determine the angulation of impacted canine. CBCT scans had been taken by ProMax 3D CBCT system were used to examine lateral root reorption. The relationship between the size of ɑ and ß angles of impacted maxillary canines and root resorption in the adjacent maxillary lateral incisor was analyzed using SPSS version 22. Results: The mean size of ɑ and ß angles had no significant correlation with the presence/absence, location, or severity of root resorption in the adjacent lateral incisor or the buccolingual position of impacted canine. The ɑ and ß angles in impacted maxillary canines cannot be used to determine the incidence or severity of root resorption in the adjacent lateral incisor. Conclusion: No significant association between ɑ and ß angles and incidence or severity of root resorption in the adjacent lateral incisor was found.

Abstract The aim of this study was to compare role of emotional intelligence in cognitive flexibility of children with and without Attention Deficit Hyperactivity Disorder (ADHD). Participants were 20 children (mean age = 10.25, SD = 2.12) with ADHD and 30 normal children (mean age = 10.96, SD = 1.32) that all of they were boy. All participants completed the Emotional Intelligence Questionnaire (Schutte et al., 1998) and the classic Stroop test, as a measure of cognitive flexibility. ADHD children performed poorer on both measures than non-ADHD children. And emotional intelligence predictors of cognitive flexibility in two groups. Overall, in children with attention deficit - hyperactivity disorder there are low performance of emotional intelligence and cognitive flexibility.

Resumen El objetivo de este estudio fue comparar el papel de la inteligencia emocional en la flexibilidad cognitiva de niños con y sin trastorno por déficit de atención e hiperactividad (TDAH). Los participantes fueron 20 niños (edad promedio = 10.25, DT = 2.12) con TDAH y 30 niños normales (edad promedio = 10.96, DT = 1.32) que todos eran niños. Todos los participantes completaron el Cuestionario de inteligencia emocional (Schutte et al., 1998) y la prueba clásica de Stroop, como una medida de la flexibilidad cognitiva. Los niños con TDAH se desempeñaron peor en ambas medidas que los niños sin TDAH. Y predictores de inteligencia emocional de la flexibilidad cognitiva en dos grupos. En general, en niños con déficit de atención - trastorno de hiperactividad hay bajo rendimiento de inteligencia emocional y flexibilidad cognitiva.

Abstract: The interaction of a melamine molecule with a carbon nitride nanotube (CNNT) was explored by means of dispersion-corrected density functional calculations. It was found that melamine prefers to be adsorbed on the porous site of the tube wall with the adsorption energy of -21.9 kcal/mol. This adsorption process significantly shifts the HOMO of the tube to higher energies, thereby reducing the gap of the tube from 3.97 to 2.65 eV. Moreover, the work function is slightly decreased which can facilitate the field electron emission from the tube surface. It is expected that CNNT can be a promising candidate for sensor devices in detecting the melamine molecule with short recovery time and high sensitivity.

Resumen: Se exploró la interacción de una molécula de melanina con nanotubos de carbono nitrógeno (NTCN) mediante cálculos de funcionales de la densidad con correcciones de dispersión. Se encontró que la melanina prefiera absorberse en los sitios porosos de las paredes del tubo, con energías de adsorción de -21.9 kcal/mol. Este proceso de adsorción desplaza significativamente el HOMO del tubo a energías más altas, reduciendo de este modo la brecha HOMO-LUMO del tubo de 3.97 a 2.65 eV. Además, la función trabajo disminuye ligeramente, lo que puede facilitar la emisión electrónica de campo desde la superficie de los tubos. Se espera que los NTCN puedan ser candidatos prometedores para dispositivos sensores en la detección de la molécula de melanina con tiempos de recuperación cortos y alta sensibilidad.