Bright inverted quantum-dot light-emitting diodes (QLEDs) have been achieved by all-solution processing with Triton X-100-assisted PEDOT:PSS deposition.
This paper presents the cellular proliferation effects of the exposure to extremely low frequency electromagnetic fields (ELF-EMF) on in-vitro cellular cultures HeLa and CHO. Through the magnetic stimulation system (MSS) the cells were exposed to magnetic fields with sinusoidal waveform at 50 Hz; initially for 40 minutes at intensities of 0.4 mT, 1.4 mT, 2.13 mT, 2.49 mT and 2.53 mT in parallel and perpendicular directions to the culture plates. Subsequently, the repetitive electromagnetic field (rEMF) was applied to 2.49 mT in parallel direction (for 40 minutes every twelve hours during 4 days) with which the highest cellular proliferation rate was obtained at 66.6 %. The results show a greater effect on proliferation in radiated cell lines, particularly in the application of rEMF a greater effect of ELF-EMF was observed in the proliferation rate of HeLa cells than in CHO cells, in contrast to the respective control cells. These results supported by other studies serve as a reference in the search for alternatives for the treatment of cervical cancer and the maintenance and preservation of cell lines.
ResumenSe presenta información experimental para la fotodegradación heterogénea del 4-clorofenol con TiO 2 -P25, en reactores solares a escala piloto del tipo cilindro parabólico compuesto (CPC). Se evaluó el efecto del pH y la concentración de catalizador sobre el porcentaje de degradación del substrato. Los reactores utilizados tuvieron diferentes áreas y diferentes volúmenes totales de operación CPC-I: 1.16 m 2 de área y 20 L; CPC-II: 2.33 m 2 y 50 L; CPC-III: 3.50 m 2 y 60 L. Se realizó el seguimiento de la degradación por mediciones de ion cloruro, por espectrofotometría UV-Vis y la determinación de color verdadero. Se encontró que las variables de mayor influencia en el proceso fueron el pH y el área del reactor. Se evidenció la formación de sustancias intermediarias que aportaron color al sistema y la desaparición de éstas a medida que se incrementa el área de exposición solar.Palabras clave: fotocatálisis solar, 4-Clorofenol, reactor CPC, espectrofotometría, TiO 2 -P25.
Pilot Scale Heterogeneous Solar Photodegradation of 4-Chlorophenol in a Cylindrical Parabolic Composed Reactor (CPC) AbstractThis study presented experimental information about heterogeneous photodegradation of 4-chlorophenol using TiO 2 -P25 in cylindrical parabolic composed solar reactor (CPC). The effect of pH and catalyst concentration on the degradation percentage of substrate were determined. The reactors have different areas and different total operating volumes: CPC-I: 1.16 m 2 de area y 20 L; CPC-II: 2.33 m 2 y 50 L; CPC-III: 3.50 m 2 y 60 L. The measurements were done using chloride ion, UV-spectrophotometry and color. It was found that the most influential variables on the process were the pH and the reactor area. Also, the formation of intermediary substances that provided color to the reaction system and the disappearance of them when sun exposure area was increased, were observed.
The effect of QD size and thermal annealing on water soluble QD solar cells is investigated. CdSe QDs corresponding to the bright-point during synthesis yield the best performance.
En este artículo se presenta la síntesis acuosa de puntos cuánticos (PCs) de seleniuro de cadmio (CdSe) con dos tipos de agentes envolventes: ácido tioglicólico (TGA) y ácido mercaptosuccínico (MSA). A partir de los espectros UV-vis se calcularon la energía de banda prohibida óptica (Eg op), el diámetro promedio de partícula, y se construyó la curva de crecimiento de los nanocristales. Por medio de los espectros de fotoluminiscencia se halló un ancho asociado a la distribución de tamaños (ATMM). Finalmente, se evaluó la fotolisis de H2O usando PCs suspendidos en solución acuosa (50 mg en 0.1 L) con sulfito de sodio (Na2SO3: 0.1 M) como donante sacrificial de electrones. Los PCs con envolvente de MSA mostraron evolución de H2 limitada por difusión y una tasa máxima de 1.126 µmol H2/h para PCs de 2.1 nm. En el caso de PCs con TGA no se presentó evolución de H2.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.