The dependence of single-molecule photoluminescence intermittency (PI) or "blinking" on the local dielectric constant (ε) is examined for nile red (NR) in thin films of poly(vinylidene fluoride) (PVDF). In previous studies, variation of the local dielectric constant was accomplished by studying luminophores in chemically and structurally different hosts. In contrast, the NR/PVDF guest-host pair...

Abstract Thin polymeric films of poly(vinylidene fluoride) (PVDF) containing variable mass fractions nanoparticles (LiZnVO 4 ) were successfully synthesized via the ordinary solution casting method. X-ray diffraction (XRD), Fourier transform infrared (FT-IR), and ultraviolet–visible spectroscopy used to explore role LiZnVO on structural optical characteristics nanocomposites. In addition, diele...

Epsilon poly-L-lysine (ε-PL) is a nontoxic biopolymer widely used in food and pharmaceutical industry. The present work reports the nutritional requirements for submerged fermentation of Streptomyces noursei NRRL 5126 using a combination of one factor at a time and statistical orthogonal array method. Two-fold increase in ε-PL productivity (74 mg/L) was observed using optimized medium containin...