Contribution from the Palo Alto Research Center, Palo Alto, California 94304, Stanford
Synchrotron Research Laboratory, Stanford Linear Accelerator Center, Menlo Park, California
94025, Polymers Division, National Institute of Standards and Technology, Gaithersburg,
Maryland 20899, and Merck Chemicals, Chilworth Science Park, Southampton, U.K.(2007-02-22時点)
