Abstract: An apparatus for separation of chemical substances and production of sterile solutions, which comprises a column closed with plugs at the ends thereof and containing an ion-exchange agent and at least one filter. In the body of each plug there is a piercing duct with an inner expansion chamber wherein a resilient stopper is placed, which stopper is provided with longitudinal notches at its external surface extending over the end surface of the stopper facing the column so that said longitudinal notches communicate with the piercing duct of the plug. At the opposite end of the stopper there is a closing cone abutting with its surface upon the edges of the end portion of the piercing duct thus ensuring tight sealing of the latter.

Abstract: A surgical instrument for applying sutures of metal staples comprises an elongated staple inserting jaw and an elongated clinching jaw located alongside the former. The anterior operative tip of the staple inserting jaw contains magazines with staple recesses wherein staple driving members are also located, and the anterior operative tip of the clinching jaw has anvils located opposite said magazines and having grooves for bending the tips of said staples. The advancement of the driving members within the magazine recesses and the ejection of the staples is realized with the aid of an actuating bar located alongside the staple inserting jaw and being capable of moving longitudinally, and having an inclined camming surface at the tip facing the magazines that is intended for engaging with the staple driving members.