RAHWAY, NJ: The Merck Institute for Science Education named Dentsu Communications its AOR, effective April 1. The New York-based firm is developing an integrated campaign which includes brand positioning, PR, Web efforts, and the creation of collateral materials. Merck founded the Rahway, NJ-based organization in 1993 to improve performance and interest in science for students from the kindergarten to the 8th gradelevel.