Dual effect of 2D WS nanoparticles on the lysozyme conformation.

In the present work we studied the effect of 2D WS nanoparticles on the conformational changes in lysozyme protein at different pH values (2.0-11.5).

Liquid exfoliation of mechanochemically nanostructured tungsten disulfide to a graphene-like state.

The possibility of the efficient preparation of graphene-like 1H-WS by the primary solventless nanostructuration of bulk 2H-WS by means of its mechanochemical treatment in the presence of a chemically inert agent (NaCl) and the subsequent liquid exfoliation of the nanostructured 2H-WS in an organic solvent is shown for the first time. The shear stresses generated during the grinding of the WS/NaCl mixture caused the formation of WS particles with a reduced number of layers, while the stresses normal to their surface led to their cracking and a significant reduction in lateral size. The graphene-like morphology of the 1H-WS nanoparticles in the prepared dispersions is confirmed by atomic force microscopy and Raman spectroscopy.

The Effect of Mechanochemical Treatment of the Cellulose on Characteristics of Nanocellulose Films.

The development of the nanomaterials with the advanced functional characteristics is a challenging task because of the growing demand in the market of the optoelectronic devices, biodegradable plastics, and materials for energy saving and energy storage. Nanocellulose is comprised of the nanosized cellulose particles, properties of which depend on characteristics of plant raw materials as well as methods of nanocellulose preparation. In this study, the effect of the mechanochemical treatment of bleached softwood sulfate pulp on the optical and mechanical properties of nanocellulose films was assessed.

Inhibition of lactophage activity by quinolinilporphyrin and its zinc compex.

The influence of free base of quinolinilporphyrin and its Zn complex on infectivity of lactophages E3, E5 and E17 has been studied. The results of our investigations show that inhibition of lactophage activity by Zn complex of quinolinilporphyrin at concentration 10 microM and 20 microM was in the range 53-62% and 65-85%, respectively. The presence of this porphyrin in nutrient medium prevents the propagation of bacteriophage infection in Lactococcus lactis, but does not affect the phage adsorption process.