BLUE STRAGGLERS IN OPEN CLUSTERS - I - NGC-2632

We present the results of a spectroscopic study of four blue straggler s from old galactic open cluster NGC 2632 (Praesepe). The LTE analysis based on Kurucz's atmosphere models and synthetic spectra technique h as shown that three stars, including the hottest star of the cluster H D73666, possess an uniform chemical composition: they show a solar-lik e abundance (or slight overabundance) of iron and an apparent deficien cy of oxygen and silicon. Two stars exhibit a remarkable barium overab undance. The chemical composition of their atmospheres is typical for Am stars. One star of our sample does not share such uniform elemental distribution, being generally deficient in metals. For all stars T-ef f and log g values were estimated. A short discussion of the obtained results is given.