Stripping of nonionic surfactants from the coacervate phase of cloud point system for lipase separation by Winsor II microemulsion extraction with the direct addition of alcohols

Transferring of red Monascus pigments from nonionic surfactant to hydrophobic ionic liquid by novel microemulsion extraction

“…Separation of organic compound from nonionic surfactant by conventional microemulsion extraction has already studied extensively, such as recovery of hydrophilic solute solubilized in a nonionic surfactant micelle aqueous solution by Winsor II microemulsion extraction, where the nonionic surfactant prefers to partition into the O m phase while the hydrophilic solute remains in the excess water phase [29]; separation of hydrophobic compound by Winsor I microemulsion extraction, where the nonionic surfactant remains in the W m phase while the hydrophobic solute prefers to partition into the excess oil phase [30]. During extraction of Monascus pigments by conventional Winsor I microemulsion, selection of organic solvent is difficult due to the hydrophobic organic solvent with limited extractive capacity for Monascus pigments while nonionic surfactant with a relatively high solubility in a hydrophilic organic solvent [23].…”

Determination of Allura red in food samples after cloud point extraction using mixed micelles

“…This type of extraction by the cloud point method was initially described by Watanabe and Tanaka for the preconcentration of Zn(II) using 1-(2-pyridylazo)napthol (PAN) as a ligand and PONPE as an extractant. Recently, cloud point technique has been successfully employed for the purification, determination and preconcentration of different species of biological interest (Afkhami & Noroozi-Asl, 2009;Sume, Narin, Soylak, Yuruk, & Dgan, 2007), organic compounds such as phenols, polycyclic aromatic hydrocarbons and polychlorinated compound (Pan, Wang, Zu, Wu, & Qi, 2010;Purkait, DasGupta, & De, 2006), radionuclide (Pepper, Peterman, Tranter, & White, 2009) and dyes Pourreza & Elhami, 2007).…”

Erucic acid production using porcine pancreas lipase: Enhancement by mixed surfactants

“…Pan et al [11] determined the effect of different concentrations of mixed nonionic surfactants (a 4:1 ratio of Triton X-114 and Triton 45) on the activity of Serratia marcescens ECU1010 lipase. The mixed nonionic surfactants negligibly influenced lipase activity at surfactant concentrations below 0.06 g/L, while a relatively high activity of lipase was observed at nonionic surfactant concentrations from 0.06~ to 0.15 g/L.…”

“…The mixed nonionic surfactants negligibly influenced lipase activity at surfactant concentrations below 0.06 g/L, while a relatively high activity of lipase was observed at nonionic surfactant concentrations from 0.06~ to 0.15 g/L. Conversely, lipase activity decreased rapidly due to inhibition at the nonionic surfactant concentration above 0.15 g/L [11]. In mustard oil hydrolysis, application of surfactants has been explored as a method of enhancement in a few studies.…”

“…Other studies reported that the surfactants sodium dodecyl sulfate (SDS), cetyl pyridinium chloride, and benzalkonium chloride act as non-irreversible denaturants of porcine pancreas lipase in a certain concentration range [13][14][15]. Sulfobetaines (TM 3-12 and TM [3][4][5][6][7][8][9][10][11][12][13][14], which are zwitterionic surfactants, and nonionic Triton X-100 or Tween-80 are also ineffective [16]. But, at low levels, SDS can activate lipase [17,18].…”