When Darleane Christian was a freshman in college at Iowa State University , she took a required chemistry course taught by Nellie May Naylor .
When Darleane Christian was a freshman in college at Iowa State University , she decided to pursue further study in that field .
When Darleane Christian was a freshman in college at Iowa State University , she took a required chemistry course taught by Nellie May Naylor , and decided to pursue further study in that field .