Effect of nitrogen sources on the yield and quality attributes of capsular polysaccharides in Streptococcus pneumoniae - Li, Yuelong; Liu, Yanli; Yao, Hantian; Wang, Yanyan; Zhou, Yechi; Zheng, Hao; Liu, Yanbin; You, Xinyan; Cao, Xin; Liu, Jiankai (Frontiers in Chemical Engineering, 2025)