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A. Ye. Kharlov, G. P. Yampol’skaya
Mixed
Monolayers of Bovine Serum Albumin with Nonionic Surfactant (Tween-80)
Abstract
Mixed monolayers of BSA and
nonionic surfactant (Tween-80) were obtained by spreading on the surface of the
subphase (water pH 6) of solutions, containing both component at wide variation
of the composition. According to compression-expansion isotherms monolayers
were related to the condensed type, when BSA concentrations in a solution were
much larger or equal to surfactant concentrations. Such monolayers are mainly
performed by the 1:1 complexes of BSA-Tween-80. Unlike to this, monolayer of
BSA is of the expanded type. At an excess of Tween-80 in a solution as compared
to BSA concentration monolayers stop to be stable. Results are of interest to
control properties of protein- surfactant mixtures and to design LB-films.
Copyright (C) Chemistry Dept., Moscow State University, 2002
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