Thuy-An Ngo, Dao-Chi Vo Thi, Nhan-Tanh Nguyen Tran, Thien-Khanh Nguyen Tran, Minh-Nguyet Doan Thi, Mai-Linh Duong and Lan-Tuyen Nguyen 2022. The effects of pH on the precipitation of rice straw lignin from An Giang, Vietnam. Vietnam Journal of Science, Technology and Engineering. 64, 3 (Sep. 2022), 3-7. DOI:https://doi.org/10.31276/VJSTE.64(3).03-07.