Affiliation: | a Department of Chemistry Education, Pusan National University, Pusan 609-735, South Korea b Department of Chemical Engineering, Kyungpook National University, Taegu 702-701, South Korea c Department of Dyeing and Finishing, Kyungpook National University, Taegu 702-701, South Korea d College of General Education, Kyungil University, Kyungsangbuk-Do 712-701, South Korea |