title: Preparation of a novel light-sensitive copolymer and its application in recycling aqueous two-phase systems.
abstract: Aqueous two-phase systems (ATPSs) are potential bioseparation techniques in industry. However, a key problem is that aqueous two-phase systems could not be effectively recycled to result in high cost and environment pollution. Recently, how to prepare recycling copolymers forming aqueous two-phase systems is focused on in the area. In this study, a light-sensitive copolymer (P(NNC)) was synthesized by using N-isopropylacrylamide (NIPA), N-vinyl-2-pyrrolidone (NVP), chlorophyllin sodium copper salt (CHL) as monomers. The copolymer P(NNC) can form ATPSs with another novel pH-sensitive copolymer (P(ADB)) which was synthesized by co-worker in our laboratory. Over 98% of the P(NNC) copolymer could be recovered by using laser radiation at 488 nm. The copolymer P(ADB) could be recovered by adjusting the isoelectric point (pI) to 4.1, with a recovery of 97%. Bovine serum albumin (BSA) and Tyr were partitioned in the P(NNC)-P(ADB) aqueous two-phase systems to examine the systems. It was found that partition coefficient of BSA and L-Tyr could reach 4.1 and 0.12 in the systems, respectively.
authors: State Key Laboratory of Bioreactor Engineering, Department of Biochemical Engineering, East China University of Science and Technology, 130 Meilong Road, Shanghai 200237, China.
authors: Wei
authors: W
authors: Wang
authors: Junfen
authors: J
authors: Wan
authors: Biao
authors: B
authors: Ning
authors: Jinan
authors: J
authors: Xia
authors: Xuejun
authors: X
authors: Cao
mesh_terms: D003247:Conservation of Natural Resources / Q000379:methods*; D003300:Copper / Q000737:chemistry; D007834:Lasers; D008665:Metalloporphyrins / Q000138:chemical synthesis* / Q000528:radiation effects; D019906:Nuclear Magnetic Resonance, Biomolecular; D011108:Polymers / Q000138:chemical synthesis / Q000737:chemistry; D012710:Serum Albumin, Bovine / Q000302:isolation & purification; D014443:Tyrosine / Q000302:isolation & purification; D014867:Water / Q000737:chemistry
chemical_list: D008665:Metalloporphyrins; D011108:Polymers; D014867:Water; D012710:Serum Albumin, Bovine; D014443:Tyrosine; D003300:Copper