ИСТИНА

For a sample of UV-rings in lenticular galaxies their star formation histories have been restored, and the oxygen abundances of the ionized gas in the rings have been determined. The star formation histories have appeared to be declining, with characteristic timescales of a few hundred million years. The metallicity of the starforming gas is strictly solar in all the rings, and does not correlate with the galaxy luminosity or with the radius of the ring.