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Earning a Ph.D. typically involves four years of study. Those aiming for this advanced degree should apply directly to the Ph.D. program. The doctoral program mandates at least 45 semester hours beyond the bachelor's level, including four seminars and eight or more graduate courses (24 credits), plus a research thesis. Candidates must also pass a qualifying exam covering chemical engineering fundamentals and must develop, propose, and defend a thesis project. Applicants holding an approved Master's degree may transfer up to 30 credits toward their Ph.D., pending approval from the Department's Graduate Committee. The Department of Chemical and Biomedical Engineering offers established graduate programs in both chemical engineering (M.S. and Ph.D.) and biomedical engineering (M.S.). Doctoral studies in biomedical engineering are offered through the Graduate School of Biomedical Sciences and Engineering.