RESUMEN
Organic-inorganic perovskites are semiconductors used for applications in optoelectronics and photovoltaics. Micron and submicron perovskite patterns have been explored in semitransparent photovoltaic and lasing applications. In this work, we show that a polymeric medium can be used to create a patterned perovskite, by using a novel and inexpensive approach.
RESUMEN
About 126 apprentices were questioned for their knowledge and habits regarding oral health to clarify motives and hindrances, to improve the dental care programme and to attain changes of their behaviour. Good expedient and methods for improving oral health of apprentices should be--in addition to regular check up--attractive lectures and discourses, instructed training of brushing, acceptance of the individuality of the apprentices, influence of fluoride application and measures and guidelines of feeding.