They also develop processes which save energy and reduce pollution, such as improved oil refining and petrochemical processing methods. Research on the chemistry of living things spurs advances in medicine, agriculture, food processing, and other areas. Many chemists work in research and development. In basic research, chemists investigate the properties, composition, and structure of matter and the laws that govern the combination of elements and reactions of substances. In applied research and development, they create new products and processes or improve existing ones, often using knowledge gained from basic research.
Chemists also work in production and quality control in chemical manufacturing plants.
They prepare instructions for plant workers which specify ingredients, mixing times, and temperatures for each stage in the process. They also monitor automated processes to ensure proper product yield, and they test samples to ensure they meet industry and government standards. Chemists also record and report on test results. Others are marketing or sales representatives who sell and provide technical information on chemical products. Chemists often specialize in a subfield.