Dennis Nagle was appointed vice president, manufacturing, at Altair Nanotechnolgies, a Reno, Nev., maker of ceramic nanomaterial products. Nagle was operations manager at Atotech USA Inc., a supplier to the printed circuit board manufacturing industry. Previously, he held senior positions at Zeeland Chemicals and at Nanophase Technologies. . . . . . . JP Sercel Associates, of Hollis, N.H., has appointed Terry Jeglum and Electronic Technology Corp. 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