[1] [1] Argyropoulos D S, Menachem S B. Biopolymers from Renewable Resources. Berlin: Springer, 1998. 292.

[2] [2] Buranov A U, Mazza G. Industrial Crops and Products, 2008, 28(3): 237.

[4] [4] You T T, Mao J Z, Yuan T Q. Journal of Agricultural and Food Chemistry, 2013, 61: 5361.

[5] [5] Agarwal U P, McSweeny J D, Ralph S A. Journal of Wood Chemistry and Technology, 2011, 31(4): 324.

[6] [6] Bjrkman A. Nature, 1954, 174: 1057.

[7] [7] Lupoi J S, Smith E A. Applied Spectroscopy, 2012, 66(8): 903.

[8] [8] Schrader B, Klump H H, Schenzel K, et al. Journal of Molecular Structure, 1999, 509(1): 201.

[9] [9] Sun L, Varanasi P, Yang F. Biotechnology and Bioengineering, 2012, 109(3): 647.

[10] [10] Agarwal U P, Reiner R S, Pandey A K, et al. Raman Spectra of Lignin Model Compounds//Proc. 13th Inter. Symp. Wood, Fiber, and Pulping Chemistry. Vol. 1, Carlton, Australia: Appita, 2005. 1.

[11] [11] Stalikas C D. Journal of Separation Science, 2007, 30(18): 3268.

[13] [13] Kim H, Ralph J. Organic and Biomolecular Chemistry, 2010, 8: 576.

[14] [14] Wen J L, Xue B L, Xu F. BioEnergy Research, 2012, 5(4): 886.