SAVANNAH — Container trucks rumbled in and out of Savannah’s port facilities behind Gov. Nathan Deal as he spoke under a canopy at the Herty Advanced Materials Development Center’s 75th anniversary celebration. This week’s ceremony also fell near the first anniversary of the center’s new identity as a part of Georgia Southern University.Chemist Dr. Charles H. Herty, also the namesake of a building and forest preserve on the Georgia Southern campus in Statesboro, founded the Savannah Pulp and Paper Laboratory in 1932.