The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
Nanoparticles are colloidal polymeric drug carriers of great promise for the peroral delivery of new drugs such as peptides, which are highly inactivated by the digestive juices. In this work, the influence of the surface charge and particle size of latexes and the pH of the suspension medium on the mucoadhesion were studied by adsorption experiments.
Surface-dilational properties of adsorbed layers of the pure milk proteins β-casein, β-lactoglobulin-A, and bovine serum albumin were studied by monitoring the surface pressure after a step-wise alteration of the area of the surface. The surface pressure instantaneously responds to the applied area variation, by an amount that is dependent on the particular protein and the initial surface pressure...
We present some results from the spectroscopic investigation of the hydrodynamic triplet in lecithin/cyclohexane/water reverse micelles. The investigation at high lecithin volume fraction clearly shows the dependence of the gel-formation process on the water content and the temperature. The observed phenomena are interpreted as originated by the competition between interfacial exchange processes and...
We describe a few applications of mechanical effects of light to study bilayer membranes. We show that lipid vesicles van be distorted by direct opticla coupling. Individual charged latex microspheres are optically manipulated and brought in contact with vesicles. We systematically observe adhesion of membranes on the polystyrene surface and sometimes a total inclusion of the bead inside the vesicle.
Double-tailed ionic surfactants form lamellar liquid crystalline phases with water. Here, we have used cryo-transmission electron microscopy (cryo-TEM) technique to study the transition to a lamellar phase at dilute aqueous solutions of the cationic surfactant didodecyldimethylammonium (DDA) with different counterions: acetate (DDAAc), hydroxide (DDAOH), bromide (DDABr), sulphate (DDAS), as well as...
The main features of the morphological structure changes during monolayer compression of 1-O-hexadecyl-rac-glycerol are studied by Brewster angle microscopy (BAM). Images of the monolayer related to the corresponding points of the π-A-isotherms are presented and discussed. The results are compared with those obtained for 1-monopalmitoyl-rac-glycerol having only small distinctions in the chemical structure.
Aqueous micellar solutions of deoxycholate (DC), glycodeoxycholate (GDC), and taurodeoxycholate (TDC) were studied to find the predominant species and their formation constants.
Spreading phopholipid monolayers at the water-air interface were used as model membrane systems in order to investigate the effect of a large ionophore molecule on the interactions between two photo-induced electron transfer. partners. We therefore studied monolayers containing the covalently bound donor (pyrene) diluted in a matrix phospholipid where valinomycin was also embedded. We studied the...
The structural interaction between the anionic surfactant sodium dodecyl sulphate (SDS) and the bipolymer gelatin has been studied using small-angle neutron scattering. In particular, neutron scattering length contrast variation has been used to highlight the structures of the components of the mixture both separately and together. Some aspects of the structure of gelatin gels are discussed in the...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.