Exclusion of bovine serum albumin from the air/water interface by sodium myristate

Expulsion of bovine serum albumin from the air/water interface by a sparingly soluble lecithin lipid

“…We have discovered two surfactants that meet these requirements: sodium myristate (SM) and dilauroylphosphatidylcholine (DLPC). Results for SM and albumin and for SM and fibrinogen have been reported [19,20]. Here, we report results of DLPC and albumin.…”

Competitive adsorption of fibrinogen and dipalmitoylphosphatidylcholine at the air/aqueous interface

“…Bands 4 and 5 in the spectrum of FB correspond to the characteristic peptide amide I (mostly C=O stretching) and the amide II (40% N-H deformation) of the protein (Fig. 2, spectrum b) [15,30]. For the FB/DPPC mixture (Fig.…”

“…Displacement of proteins by small surfactant molecules may occur because the surfactants either have higher adsorption energies than proteins or produce lower surface free energies. Exclusion of albumin and FB from the air/water interface by sodium myristate was demonstrated by McClellan and Franses [15] and Hernandez et al [5]. Expulsion of albumin from the air/water interface by dilauroylphosphatidylcholine (DLPC), which is a sparingly soluble lecithin lipid homologue of DPPC, was reported recently by Phang and Franses [16].…”

“…Liu and Chang found that the dynamic tension lowering activity of DPPC can be inhibited by FB [9]. There have been several recent publications on desorption or expulsion of serum proteins by various surfactants or lipids [10][11][12][13][14][15][16], which is analogous to the Vroman effect which involves expulsion of the initially adsorbed protein by another [17,18]. The expulsion of albumin by lipid Langmuir monolayers spread via an organic solvent has been documented by Teneva et al [10], Patino and Nino [11], Cho et al [12], Wen and Franses [8], and Kim and Franses [13].…”

Interfacial effects and emulsion stabilization by in situ surfactant generation through the saponification of esters

“…This estimated value is roughly 1/20 th of the reported saturation surface coverage corresponding to a closely packed monolayer of sodium myristate at an air-water interface, approximately 1*10 -6 mol/m 2 . [ 36,37,32,38] It is important to note that these rough estimates do not account for surfactant desorption from the interface into the oil phase or for surfactant that was created but not collected from the oil-water interface after centrifugation due to difficulty in separating the emulsion fully and a small emulsion phase which spontaneously formed at the bulk oil-water interface upon any slight agitation. It is, therefore, likely that this calculated surface coverage is an underestimate.…”