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Tulsa is the second-largest city in the state of Oklahoma and 47th-most populous city in the United States. As of July 2015, the population was 403,505, the most densely populated county in Oklahoma, with urban development extending into Osage, Rogers, and Wagoner counties.

Staffing agencies in Clinical & Scientific. Biochemists and biophysicists study the chemical and physical principles of living things and of biological processes, such as cell development, growth, heredity, and disease. Chemists and materials scientists study substances at the atomic and molecular levels and the ways in which the substances interact with one another. They use their knowledge to develop new and improved products and to test the quality of manufactured goods.