Optical and Thermal Stability of Oligofluorene/Rubber Luminescent Blend.

This paper proposes to obtain homogeneous and stable blends of oligo(9,9-dioctylfluorene)-co-phenylene (OF), a conjugated oligomer with strong tendency of formation of excimers in the solid state, and nitrile rubber (NBR). This rubber protection reduces the formation of polymer excimers in the films. The fluorene oligomer was synthesized via Suzuki reaction and incorporated in the nitrile rubber.

Conjugated polymers nanostructured as smart interfaces for controlling the catalytic properties of enzymes.

The search for new molecular architectures to improve the efficiency of enzymes entrapped in ultrathin films is useful to enhance the effectiveness of biosensors. In this present work, conjugated polymers, based on thiophene and fluorine, were investigated to verify their suitability as matrices for the immobilization of urease. The copolymer poly[(9,9-dioctylfluorene)-co-thiophene], PDOF-co-Th was spread on the air-water interface forming stable Langmuir monolayers as determined by surface pressure-area isotherms, polarization-modulation reflection-absorption infrared spectroscopy (PM-IRRAS), and Brewster angle microscopy (BAM).

[The perception of health professionals about pain management and opioid use: a qualitative study].

Pain is a public health problem whose management shows a series of deficiencies. This study evaluates both perception and knowledge of pharmacists, physicians and nurses about pain management and aspects related to utilization of opioids such as legislation, side effects, creeds, fear and prejudice. This exploratory qualitative study was conducted by means of focal interviews of a stratified random sample composed by thirty pharmacists, physicians and nurses.