Investigation of the defect complexes in highly Mg-doped LiNbO₃ crystals by ⁹³Nb NMR method

Angular dependence of the line width of the <⁹³Nb NMR spectrum central transition for LiNbO₃ crystal with congruent composition and for the samples with high Mg concentration was experimentally investigated. Having the experimental results compared with the results obtained by computer simulation, it has been concluded that the most probable type of defects in magnesium doped LiNbO₃ crystals are (4MgLi²⁺ + 4VLi) defect complexes when four Li vacancies and three MgLi²⁺ ions being localized in the seven nearest positions to the central MgLi²⁺

Preparation of miniemulsions of plant extracts

The composition and technology for the preparation of a combined water solution of hydrophobic plant extracts, eucalymine and estifan are developed. The concentration of surfactants (Tween 20 and 80) and soya lecithin that is optimal for obtaining stable miniemulsion systems is determined. The sizes and zeta potential of the obtained dispersed nanoscale particles are established. © 2017, Pleiades Publishing, Ltd

Preparation of miniemulsions of plant extracts

The composition and technology for the preparation of a combined water solution of hydrophobic plant extracts, eucalymine and estifan are developed. The concentration of surfactants (Tween 20 and 80) and soya lecithin that is optimal for obtaining stable miniemulsion systems is determined. The sizes and zeta potential of the obtained dispersed nanoscale particles are established. © 2017, Pleiades Publishing, Ltd