The National Academy of Sciences of Belarus

The effects of glycerol (GL) addition on the coloration and bleaching of photochromic poly(vinyl alc.)-tungstophosphoric acid nanocomposite films were studied at GL concentrations (C_GL) 2.1-33 wt%.A 50 % enhancement of the coloration efficiency was observed at C_GL ≥ 8.3 wt%.The bleaching rate rapidly increased with increasing C_GL above 8.3 wt% so that the 33 wt%-GL films were almost completely bleached in several hours while the GL-free films retained their initial color for at least 10 days.This paper represents a simple and effective way of achieving dramatic improvement in the bleaching performance of photochromic polymer-heteropolyacid nanocomposites and simultaneously enhancing their coloration efficiency.

This study investigated the effects of alkali-extracted Flammulina velutipes polysaccharides (AEFP) on the physicochemical properties, starch digestibility, and glycemic response of fresh wet rice noodles (WRN). Adding 0.5 % - 4 % AEFP reduced the breaking rate, enhanced water absorption, and improved textural properties (e.g., elasticity, chewiness). AEFP decreased starch digestion rates in vitro, increasing resistant starch (22.27 %) whereas reducing rapidly digestible starch (19.2 %) and the predicted glycemic index (from 90.37 to 80.07). Structural analyses indicated that AEFP enhanced starch-polysaccharide interactions, inhibited starch retrogradation, and stabilized moisture distribution. In vivo studies in mice demonstrated that 4 % AEFP-WRN significantly reduced postprandial blood glucose levels (19.68 % reduction), likely due to enhanced satiety by increasing plasma glucagon-like peptide-1 and peptide tyrosine-tyrosine levels and delayed gastrointestinal motility. These findings reveal AEFP as a dual-action hydrocolloid capable of promoting noodle quality and modulating glycemic response.

Model optomech. systems with photon-vibration interactions linear, quadratic, and cubic in mech. displacements are studied under conditions for adiabatic elimination of the photon field.The opportunity of transformation of effective potential describing the dynamics of the mech. resonator from single-well to double-well is demonstrated.The dynamics of the mech. resonator is considered in the presence of (i) only linear interaction, (ii) only quadratic interaction, (iii) both linear and quadratic interactions, and (iv) all three interactions, while other parameters of the optomech. system, the modulation optical field, and the initial conditions remain fixed.Quasiperiodic oscillations of the mech. resonator in the case (i) are replaced by chaotic ones when the cases (ii) or (iii) are realized.It is interesting that in the presence of all three interactions, the chaotic behavior of the mech. oscillator becomes quasi-periodic.However, increasing the power of the modulation field again leads to chaos.