The Milwaukee Chapter of the Society of Plastics Engineers will present a seminar on materials analysis and bioplastics on Tuesday, March 15 from 4:30 to 8:30 p.m. at the Brookfield Sheraton, 375 S. Moorland Rd., Brookfield. Cost is $30 for members and $35 for non-members. For information or to register, visit www.milwaukeespe.org/general-register.htm.