Saint-Gobain: Roberto Caliari has been appointed senior vice president, responsible for ceramics and plastics, abrasives and reinforcements branches. Mr. Caliari will personally head the ceramics and plastic branch. He formerly served as general delegate for Italy and Greece. Americo Denes was named director of the abrasives branch. He most recently served as worldwide director of coated abrasives. Jean-Philippe Buisson was appointed director of the reinforcements branch. Mr. Buisson previously served as general manger of the Asia-Pacific unit of Saint-Gobain Vetrotex International.