Partition of dipeptides in aqueous polymer two-phase systems as a function of pH in the presence of salts

Salt-induced reentrant hydrogel of poly(ethylene glycol)–poly(lactide-co-glycolide) block copolymers

“…For instance, a saltingout effect of proteins was reported over one hundred years ago, 55 which has been applied to separate and purify proteins. 59 As far as synthetic polymers are concerned, salts decrease the cloud point of the PEG aqueous solutions, [60][61][62][63] induce micellization of triblock copolymers of poly(ethylene glycol)-poly(propylene glycol)-poly(ethylene glycol) (PEG-PPG-PEG), [64][65][66] and inuence the slow relaxation mode of semidilute PNIPAM aqueous solutions. 54 The effect on the PEG-polyester thermogel system caused by salts has also been examined, and salts decrease the gel-sol transition temperature 67 or change the sol-gel transition temperature.…”

Influence of Electrolytes on Liquid−Liquid Extraction

“…An ATPS can, for example, be created by adding two water-soluble polymers such as dextran and poly(ethylene glycol) (PEG) to water. Above certain concentrations a two-phase system is formed where both phases consist mostly of water while one of the polymers is predominantly present in each phase. − Because of the high water content, these systems can be used for the extractive separation and purification of sensitive biomolecules or even cell organelles. ,, …”

Relative hydrophobicity of amino acid residues in homooligopeptides as measured by aqueous two‐phase partitioning

“…Partitioning of amino acids, their derivatives and peptides in aqueous two‐phase systems has been studied (13–19) under different conditions. The results showed that partitioning of peptides depends upon their hydrophobicity which is related to the peptide conformation, and that the peptide hydrophobicity may be used as a structural descriptor for QSAR analysis.…”