"Biochemistry is a Secondary Tech that can be researched from Chemistry. Biochemistry allows for the construction of a Water Refinery and a Petrochemical Plant. There is no affinity linked to this technology."@en . . "Biochemistry is a Secondary Tech that can be researched from Chemistry. Biochemistry allows for the construction of a Water Refinery and a Petrochemical Plant. There is no affinity linked to this technology."@en . . "Biochemistry (CivBE)"@en .