Amy Factor has been appointed interim CEO and a member of the board of Arbios Systems (Los Angeles). Dr. Jacek Rozga, founder of Arbios, will remain the company's president and chief scientific officer. The company said it has begun a search for a permanent CEO. Factor has been a consultant to Arbios since November 2003. Arbios, through its wholly-owned subsidiary, Arbios Technologies, discovers, acquires and develops liver assist devices and new technologies for the diagnosis and treatment of acute liver failure.

Eran Aharonson has been appointed vice president, computational life science research and development for Compugen (Tel Aviv, Israel). Aharonson joins Compugen from Advanced Recognition Technologies, where he served for 12 years, most recently as CEO. Compugen is a diagnostics and drug and discovery company incorporating ideas and methods from mathematics, computer science, and physics into biology, chemistry and medicine.

Grant Carlson has been promoted from vice president, business development to president and chief operating officer of Nanobac Life Sciences (Tampa, Florida), effective immediately. He now has day-to-day operational responsibility for Nanobac's in vitro diagnostics, dietary supplement and drug discovery businesses. Previously, Carlson was vice president of marketing and business development at Agilix and before that held the same positions at Dianon Systems before its acquisition by LabCorp. Nanobac is focused on developing diagnostics for nanobacterial infection.