Phase behaviour and morphology of binary mixtures of DPPC with stearonitrile, stearic acid, and octadecanol at the air−water interface

Differences in surface behaviour of galactolipoids originating from different kind of wheat tissue cultivated in vitro

“…The definitive proof of miscibility requires a negative Gibbs energy of mixing, G MIX , over the whole composition range (Romão and Gonç alves da Silva, 2004). For a mixed monolayer, the Gibbs free energy of mixing, G MIX , can be expressed as (Chou et Shen et al, 2006):…”

Thermodynamic characterization of the prevailing molecular interactions in mixed floating monolayers of phospholipids and usnic acid

“…The definitive proof of miscibility is the observation of a negative value of G M [10]. The equations…”

“…Important questions about the physicochemical aspects of the floating monolayer, such as dominating molecular interactions, the nature of the bonding forces, and the organization of the phospholipid complex formed, can be Scheme 1. addressed by assessing the corresponding thermodynamic parameters [8,9]. Specifically, calculations of the excess free energy, the entropy and enthalpy of floating films obtained by mixing drug and different lipids can engender interesting inferences about the extent and nature of existing molecular forces [10,11].…”

Phase diagram of mixed monolayers of stearic acid and dimyristoylphosphatidylcholine. Effect of the acid ionization

“…Mixed monolayers composed of phospholipids with fatty acids have been studied previously under different conditions and exploring different effects (Maggio andLucy, 1975, 1976;Bringezu et al, 2001;Koynova and Tenchov, 2001;Roach et al, 2004;Romão and Gonç alves da Silva, 2004;Schmidt et al, 2001;Schullery et al, 1981;Templer et al, 1998). However, to our knowledge no systematic study of the phase diagram or of the detailed effect of ionization on miscibility and domain topography was carried out in this kind of mixtures.…”