ted to 25% of a 40- hour work week, but 25% of a researcher's total professional effort, which might be as much as 80 hours for many investigators. "U.S. Rules on Accounting for Grants," Selenar, 311 (January 2006): 168-169. 9 Jeremy Knowles, Dean of the Faculty of Arts and Sciences at Harvard from 1991 to 2002, was a renowned chem