Commentary: Preparation, characterization and application of rod-like chitin nanocrystal by using p-toluenesulfonic acid/choline chloride deep eutectic solvent as a hydrolytic media - Jiang, Wen-Hao; Gu, Wei-Ming; Xiong, Mei-Jie; He, Kang-Ping; Xu, Xiao-Ying; Zhang, Wen-Xi; Shen, Rui-Feng; Lai, Lin-Hao; Lv, Yong-Si; Cao, Shi-Lin (Frontiers in Bioengineering and Biotechnology, 2020)