Царський і республіканський Рим в антикознавчих дослідженнях М.П. Драгоманова

У статті розглянуто особливості вивчення та рецепції римської історії VIII–I ст. до н. е. в антикознавчих студіях М. Драгоманова. Зроблено висновок, що дослідження М. Драгоманова з історії Риму вплинули на формування наукових і суспільно-політичних поглядів вченого, а також Лесі Українки та І. Франка.In the article peculiarities of study and reception of Roman history VIII–I centuries B.C. in M. Drahomanov’s classical researches are highlighted. The author concludes that M. Drahomanov’s Roman classical studies influenced on formation of scientific and political views of M. Drahomanov, Lesya Ukrainka, I. Franko

Hollow silica spheres with ordered pore structure and their application in controlled release studies

Herein we report the synthesis and characterization of hollow silica spheres with a narrow size distribution, uniform wall thickness, and a worm-like pore structure. The formation of these spheres was monitored by confocal laser scanning microscopy and dynamic light scattering. A model for the molecular build-up of these silica hollow spheres is derived from these data in combination with studies of the as-made particles by transmission electron microscopy, scanning electron microscopy, pore size analysis, thermogravimetric analysis, and solid-state nuclear magnetic resonance. We further demonstrate that these spheres can be used for the encapsulation and subsequent release of different dye molecules

Reducing friction in low velocity sliding contacts involving skin equivalent silicone rubber

The effect of binding decamethyl-cyclopentasiloxane (silicone oil) to polymeric coating structures based on polyacrylic acid grafted with poly(ethylene glycol), Wacker 1100, Wacker 1650 or poly(dimethylsiloxane) is discussed and compared with the tribological test results for the water or dodecane lubricated situation. Friction was measured at low velocity sliding for a flat-on-flat configuration. A specific silicone rubber is used as counter surface based on a FIFA test to measure skin / surface friction in quality assessments of artificial turf. The results show promising combinations for which friction was reduced with 92% compared to dry conditions