ABSTRACT
In this work lecithin phospholipids monolayers are formed using Longmuir technique. The changes in surface pressure and other physical properties of monolayer as a function of added formaldehyde and pH conditions are studied. General solidifying effect and marked decrease in compressibility are associated with both formaldehyde addition and acidic shift in the pH of the subphase. The effect of adding glutaraldehyde on the stability, electrical conductivity, and gramicidin A single channel characteristics within the bimolecular black lipid membranes are studied. A noticeable increase in the life time of the membrane was noticed but no significant change has occurred in the conductance due to the addition of gramicidin A single channel even with the addition of glutaraldehyde