Also

* Federal prosecutors are examining payments that pharmacy benefit management company Medco Health Solutions Inc. made to a health insurer to see whether they violated anti-kickback laws, according to court filings.

* Martha Stewart Living Omnimedia Inc.’s former chief executive, Sharon Patrick, has left the New York media and merchandising company’s board, the company said.

* Intelsat Ltd. said it had regained control of a communications satellite whose failure had threatened the planned $3.1-billion sale of the company.

* Unocal Corp., the El Segundo-based oil and natural gas company, said its directors authorized the repurchase of as much as $465 million in preferred securities and common stock.

* Edwards Lifesciences Corp. said it did not expect U.S. regulators to provide an answer by the end of the year on whether it could conduct a clinical trial on its less invasive heart valve implant, called percutaneous aortic valve replacement.

* Constellation Brands Inc., the world’s largest winemaker, said it purchased a 40% stake in Ruffino for about $80 million to enter the market for premium Italian wines. The Folonari family, owner of Ruffino since 1913, retains the majority interest in and management of the Italian vintner, Fairport, N.Y.-based Constellation said.

* UAL Corp., parent of United Airlines, said it would lay off up to 825 ramp and customer service employees as it continued its attempt to emerge from Bankruptcy Court protection. The cuts would occur at 18 airports.