1. Department
of Forest Biomaterials, North Carolina State University, 2820 Faucette
Drive, Raleigh, North Carolina 27695-8005, United States
2. Department
of Chemistry, North Carolina State University, 2620 Yarbrough Drive, Raleigh, North Carolina 27695-8204, United States
3. Key
Laboratory of Pulp and Paper Science and Technology, Qilu University of Technology, Shandong Province 3501 Daxue Road, Changqing, Jinan, P.R. China 250353