A5075625546- Photochemistry and Electron Transfer Studies
- Nonlinear Optical Materials Studies
- Nonlinear Optical Materials Research
- Spectroscopy and Quantum Chemical Studies
- Liquid Crystal Research Advancements
- Photoacoustic and Ultrasonic Imaging
- Thermography and Photoacoustic Techniques
- Experimental and Theoretical Physics Studies
- Porphyrin and Phthalocyanine Chemistry
- Analytical Chemistry and Sensors
- Photonic Crystals and Applications
- Photonic and Optical Devices
- Advanced Chemical Sensor Technologies
- Knowledge Societies in the 21st Century
- Semiconductor materials and devices
- Traffic and Road Safety
- Advanced Sensor Technologies Research
- Gender and Feminist Studies
- Autopsy Techniques and Outcomes
- Sports Performance and Training
- Luminescence and Fluorescent Materials
- Multidisciplinary Science and Engineering Research
- Advertising and Communication Studies
- Sports Dynamics and Biomechanics
- Web and Library Services
Universidad Nacional Autónoma de México
2011-2025
Este estudio analizó el sesgo de género que presentan 297 estudiantes bachillerato, con una edad promedio 15 años, al solicitarles revisar textos cortos divulgación científica exploran la relación entre violencia y estado bioquímico las personas. Se utilizaron dos "cuestionarios espejo" para evaluar este en escala del 0 10. Un grupo 181 respondió primer cuestionario, mientras otro 116 segundo. Ambos cuestionarios incluían preguntas control secciones prueba. En primera sección prueba...
Dendrons of pyrene derivatives were attached to a porphyrin core. A marked effect in solution for the dendrimers was observed absorption spectra. All compounds obtained characterized by 1H-, 13C-NMR, FTIR, UV-vis, MALDI-TOF or FAB+ mass spectrometry and elemental analysis. The cubic nonlinear optical behavior some synthesized tested via Z-Scan measurements spin-coated film samples.
A novel approach to specify symmetries and main optical axes in anisotropic polymeric films is proposed. This method based on the analysis of absorption via pulsed laser photoacoustic (PLPA)- technique a common polarizer film, while rotating axis at normal incidence. Since PLPA-signals are directly proportional absorption, it shown that symmetric complementary Malus's law can be obtained over full root mean square (RMS)- correlation (CA)-analysis PLPA-signals. Such data processing reveals...
The catalyst-free sonogel route was implemented to fabricate highly pure, optically active, hybrid azo-dye/SiO2-based spin-coated thin films deposited onto ITO-covered glass substrates. azo-dyes exhibit a push–pull structure; thus chromophore electrical poling performed in order explore their quadratic nonlinear optical (NLO) performance and the role of SiO2 matrix for allowing molecular alignment within host network. Morphological characterizations were film samples according atomic force...
The well-established catalyst-free sonogel route was successfully implemented to fabricate highly pure, optically active, solid state polymeric azo- dye/SiO2-based hybrid composites. Bulk samples exhibit controllable geometrical shapes and monolithic structure with variable dopant concentrations. Since the azo-dye chromophores a push–pull structure, film were spin-coated on ITO-covered glass substrates; molecular alignment then performed via electrical poling in order explore quadratic...
Se presentan los detalles metodológicos de una simulación numérica por computadora que modela la caída persona, quien sufre varias colisiones durante su descenso. En estas colisiones, brazo se engancha con parte estructura del edificio desde el cual cae. El cuerpo termina movimiento en interior un pasillo, no más baja edificio. Tales condiciones hacen singular al caso. Este tipo herramientas son útiles para evaluar hipótesis investigaciones forenses, lo requieren seguir etapas bien definidas...
Se realizó una búsqueda en la literatura especializada enseñanza de física (en español e inglés) revisando ejercicios, ejemplos y otros materiales didácticos con un enfoque forense. Si bien existen artículos especializados esta área, no se encontró libro texto dedicado al ámbito forense, aunque sí existe manual prácticas. revisaron 27 libros física, mediante exploración palabras clave del quehacer forense examinando si el contenido particular cumplía cuatro criterios que considera definen...
In this work, a liquid crystalline octopolar molecule 1,3,5-tris(ethynylphenyl)benzene-(1) was successfully embedded as dopant chromophore within SiO2 based sonogel network in order to prepare stable solid state hybrid materials with intense second harmonic generation (SHG). This recently synthesized compound exhibit centrosymmetric C 3 -symmetry structure, which is constituted by an electron-rich core and electron-poor periphery groups. The method, induced energetic ultrasonic (US) waves...
Predesigned push-pull azo-dye polymers were homogeneously dispersed within a SiO 2 sol-gel matrix synthesized via the sonogel (SG) route. High-quality spin-coated films obtained with these hybrid structures in liquid sol-phase. The spectroscopic UV- Vis analyses reveal appropriate insertion of organic compounds highly pure SG-environment whereas thermal (DSC) analysis and photoacoustic measurements evidence thermomechanical stability amorphous layers. As optical attenuation, refractive index...
We present a simple experiment to show the photoacoustic effect, well established but not widely known effect which has many applications. The consists of generation acoustic waves by pulsed radiation incident on sample. In our case, we used homemade Nitrogen laser as source light for samples in order measure speed sound. is easy build undergraduate students, it transversal discharge at atmospheric pressure (TEA), excited Blumlein circuit, emitting nanosecond pulses ultraviolet region...
En este estudio, se analizó la videograbación casual de un testigo, donde luchador profesional patea a adversario y, complementando con información pública, estimó fuerza las piernas al dar el golpe. Sin embargo, siendo los datos obtenidos una fuente secundaria, ecuaciones deterministas por sí solas son inadecuadas para calcular incertidumbre asociada, lo que utilizó proceso cálculo aleatorio. Programando peores condiciones tolerables, obtuvo gran coherencia (es decir, correlación: R2 =...
Different thermoelastic parameters, for example, the acoustic attenuation and speed of sound, are fundamental instrumental calibration quantitative characterization organic-based dissolutions. In this work, these parameters as functions concentration an organic dye (crystal-violet: CV) in distillated water (H 2 O) based dissolutions investigated. The sound was measured by pulsed-laser photoacoustic technique (PLPA), which consists generation acoustic-waves optical absorption pulsed light a...
Phthalocyanines (Pc) based compounds having central metallic atoms of Ni were successfully embedded in mesoporous silica gels via a catalyst-free sol-gel (sonogel) process order to fabricate optically active solid-state hybrid glasses both bulk and thin film formats at different dopant concentrations. The organic-inorganic composites obtained room temperature processing showed stable mechanical performance, controllable geometrical shapes, good transparency homogeneity suitable for linear...