Combination mechanism of lysozyme with polyacrylic acid at equilibrium in polyelectrolyte precipitation

Woon Soo Kim, Hyun Seok Kim, Izumi Hirasawa, Woo Sik Kim

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)


In polyelectrolyte precipitation of lysozyme, the combination mechanism between lysozyme and polyacrylic acid (PAA) at various experimental conditions was investigated from the stoichiometric coefficient at equilibrium in a batch reactor. At the underdosed condition of PAA to lysozyme, the lysozyme- PAA combination was performed by the electric charge neutralization and polymer bridging between lysozyme and PAA. As the PAA dosage decreased and its molecular weight increased, the bridging effect of PAA became more significant in the lysozyme-PAA combination because the more lysozyme was captured by the polymer bridging of PAA. The stoichiometric coefficient of the lysozyme-PAA combination, which was estimated from the lysozyme separation, was affected by both the PAA dosage and its molecular weight, but the effect of agitation was not observed. The linear equations were derived from the relationship between the stoichiometric coefficient and the dosage at three different PAA molecular weights of 2.0 × 103, 4.5 × 105 and 4.0 × 106, and well consistent with the experimental data.

Original languageEnglish
Pages (from-to)1244-1250
Number of pages7
Issue number10
Publication statusPublished - 2001 Oct 1


  • Combination rate
  • Lysozyme
  • Molecular weight
  • Polyelectrolyte precipitation
  • Polymer bridging

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)


Dive into the research topics of 'Combination mechanism of lysozyme with polyacrylic acid at equilibrium in polyelectrolyte precipitation'. Together they form a unique fingerprint.

Cite this