Acknowledgments
This work was supported by National Natural Science Foundation of China (21305076, 21275089), the Natural Science
Foundation of Shandong Province (ZR2012BQ022) and the Foundation of Qufu Normal University (BSQD20110118).
Appendix A. Supplementary data Supplementary data associated with this article can be found, in the online version, at http://dx.doi.org/10.1016/j.foodchem.2015. 07.024.