1.   A Palo Alto biotech firm will announce today that it has received Food and Drug Administration approval to start selling a foam to treat psoriasis of the scalp.

2.   Grace also hopes to sell the foam to schools, hospitals and other sites with asbestos problems.

3.   He sold foam for parts of wheelchairs.

4.   Thomas Wiggans, chief executive of Connetics Corp., said he expects to start selling the foam under the brand name of Luxiq within a month.