Also

* PepsiCo Inc., the world’s second-largest maker of soft drinks, named former Kraft Foods Inc. executive Irene Rosenfeld as chairwoman and chief executive of its Frito-Lay business.

* Sun Microsystems Inc., the No. 3 maker of computers that run corporate networks, cut prices on some models as much as 35% to reclaim market share from IBM Corp. and Dell Inc.

* Dell Inc., the world’s largest maker of personal computers, will enter the fastest-growing part of the printer market with three color laser machines it says cost as much as 57% less than competing products.

* Amgen Inc.’s leptin, an experimental hormone initially tested for treating obesity, may help prevent osteoporosis and infertility among very thin women, according to a study in today’s issue of the New England Journal of Medicine.

* Altria Group Inc.’s Philip Morris USA, Reynolds American Inc. and other U.S. cigarette makers asked a federal judge to delay the trial of a racketeering suit by the Justice Department until next year.