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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 

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Poly(ethylene glycol)-salt aqueous two-phase systems with easily recyclable volatile salts.

Aqueous two-phase systems (ATPSs) have great potential in the downstream processing of fermentation products. However, the consumption of large amounts of auxiliary materials limits application in industrial practice. Promising alternatives to the salts used so far are volatile salts such as ammonium bicarbonate and ammonium carbamate, which can be recycled to the extraction system as gaseous carbon dioxide and ammonia. In this work, it is demonstrated that ammonium carbamate in combination with poly(ethylene glycol) (PEG, molecular masses of 2000, 4000 and 10000) indeed produces aqueous two-phase systems (ATPSs) at a temperature of 25 degrees C and atmospheric pressure. Ammonium bicarbonate is clearly not suitable as a phase-forming salt, because of its too-low solubility in water.[1]

References

  1. Poly(ethylene glycol)-salt aqueous two-phase systems with easily recyclable volatile salts. van Berlo, M., Luyben, K.C., van der Wielen, L.A. J. Chromatogr. B Biomed. Sci. Appl. (1998) [Pubmed]
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