Biofuels and renewable chemical technology firm Verdezyne announced Wednesday that it has named a new Chief Business Officer. The firm said that Ray W. Miller, who was at DuPont from 1972 through 2011, has joined the firm to head up business development initiatives for the company. Miller was most recently Global Business Development Manager, Biomaterials and Specialties, at DuPont. Veredyzyne is venture backed by BP Alternative Energy Ventures, DSM Venturing B.V., OVP Venture Partners and Monitor Ventures. Verdezyne is based in Carlsbad.