Terahertz absorption characteristics of guar gum determined via microfluidic technologyFeng-Xuan Zhang, Guo-Yang Wang, Hai-Yun Huang, Meng-Han Chen, Si-Jia Zhang, Bo Su and Cun-Lin ZhangJ. Eur. Opt. Soc.-Rapid Publ., 17 1 (2021) 17DOI: https://doi.org/10.1186/s41476-021-00162-x