Nonlinear Generation of Vorticity by Surface Waves.

We demonstrate that waves excited on a fluid surface produce local surface rotation owing to hydrodynamic nonlinearity. We examine theoretically the effect and obtain an explicit formula for the vertical vorticity in terms of the surface elevation. Our theoretical predictions are confirmed by measurements of surface motion in a cell with water where surface waves are excited by vertical and harmonic shaking the cell.

Quasiadiabatic decay of capillary turbulence on the charged surface of liquid hydrogen.

We study the free decay of capillary turbulence on the charged surface of liquid hydrogen. We find that decay begins from the high frequency end of the spectral range, while most of the energy remains localized at low frequencies. The apparent discrepancy with the self-similar theory of nonstationary wave turbulent processes is accounted for in terms of a quasiadiabatic decay wherein fast nonlinear wave interactions redistribute energy between frequency scales in the presence of finite damping at all frequencies.

[Quantitative determination of the antibiotic doxorubicin by high-performance liquid chromatography].

A new three-component system was developed for separation of a mixture containing 6 components: doxorubicin, rubomycin, dihydrorubomycin, 14-bromrubomycin, doxorubicinone and rubomycinone. The system uses reverse phase high performance liquid chromatography. Separation was performed on a column with Spherisorb C18 (4.