文献类型：期刊文献

英文题名：Partition of spiramycin in a recyclable aqueous two-phase system based on pH-responsive and thermosensitive polymers

作者：Zhang, Yan[1];Zhang, Hongzhou[2];He, Dong[2];Cao, Xuejun[1];Wan, Junfen[1]

机构：[1]East China Univ Sci & Technol, Dept Bioengn, State Key Lab Bioreactor Engn, 130 Meilong Rd, Shanghai 200237, Peoples R China;[2]Henan Topfond Pharmaceut Co Ltd, 2 Guangming Rd, Zhumadian 463000, Henan, Peoples R China

年份：2020

卷号：99

起止页码：254

外文期刊名：PROCESS BIOCHEMISTRY

收录：;EI(收录号：20203909225708);WOS:【SCI-EXPANDED(收录号:WOS:000596422700005)】；

语种：英文

外文关键词：Aqueous two-phase system; Partition; Recovery; Spiramycin

摘要：Aqueous two-phase systems have been widely studied for the separation and recovery of bioproducts. In this study, the thermosensitive polymer EO30PO70 and pH-responsive polymers (P-ADB4.66 and P-ADB6.26) were used to develop a recyclable aqueous two-phase system suitable for spiramycin partitioning. EO30PO70 represents poly-(ethylene oxide-propylene oxide), where 30 and 70 indicate the proportions of ethylene oxide and propylene oxide, respectively. P-ADB4.66 and P-ADB6.26 represent poly-(acrylic acid-dimethylamine ethyl methacrylate-butyl methacrylate), where the numbers (4.66 and 6.26) in the subscripts indicate the isoelectric point of the polymers. The phase separation mechanism of ATPS was studied through low-field nuclear magnetic resonance (LF-NMR) and surface tension. Moreover, the parameters affecting spiramycin partitioning, such as system components and composition, pH, temperature, and type and concentration of additive salt, were investigated. The best partitioning conditions were determined using 4.70% P-ADB6.26 and 31.67% EO30PO70 in the presence of 0.05 mol/L NaSCN at 35 degrees C and pH = 9.2. The highest partition coefficient of spiramycin from fermentation broth was 11.92, with an extraction recovery of 97.69%. In addition, phase-forming polymers P-ADB6.26 and EO30PO70 could be recovered by regulating the pH or temperature, and their recoveries reached 92.39% and 98.76%, respectively.