Swelling and Dissolution of Lamellar Phases: Role of Bilayer Organization

Langmuir ◽  
1998 ◽  
Vol 14 (26) ◽  
pp. 7371-7377 ◽  
Author(s):  
M. Buchanan ◽  
J. Arrault ◽  
M. E. Cates
Keyword(s):  
Lamellar Phases

scholarly journals Understanding the Unique Role of Phospholipids in the Lubrication of Natural Joints: An Interfacial Tension Study

Coatings ◽  
2019 ◽  
Vol 9 (4) ◽  
pp. 264 ◽  
Author(s):  
Aneta D. Petelska ◽  
Katarzyna Kazimierska-Drobny ◽  
Katarzyna Janicka ◽  
Tomasz Majewski ◽  
Wiesław Urbaniak
Keyword(s):  
Interfacial Tension ◽  
Lipid Bilayers ◽  
Solid Lubricant ◽  
Solid Lubricants ◽  
Phospholipid Bilayer ◽  
Low Friction ◽  
Unique Role ◽  
Lamellar Phases ◽  
Chemical Inertness

Some solid lubricants are characterized by a layered structure with weak (van der Waals) inter-interlayer forces which allow for easy, low-strength shearing. Solid lubricants in natural lubrication are characterized by phospholipid bilayers in the articular joints and phospholipid lamellar phases in synovial fluid. The influence of the acid–base properties of the phospholipid bilayer on the wettability and properties of the surface have been explained by studying the interfacial tension of spherical lipid bilayers based on a model membrane. In this paper, we show that the phospholipid multi-bilayer can act as an effective solid lubricant in every aspect, ranging from a ‘corrosion inhibitor’ in the stomach to a load-bearing lubricant in bovine joints. We present evidence of the outstanding performance of phospholipids and argue that this is due to their chemical inertness and hydrophilic–hydrophobic structure, which makes them amphoteric and provides them with the ability to form lamellar structures that can facilitate functional sliding. Moreover, the friction coefficient can significantly change for a given phospholipid bilayer so it leads to a lamellar-repulsive mechanism under highly charged conditions. After this, it is quickly transformed to result in stable low-friction conditions.

Mechanisms of Initiation of Membrane Fusion: Role of Lipids

2000 ◽  
Vol 20 (6) ◽  
pp. 465-482 ◽  
Author(s):  
Paavo K. J. Kinnunen ◽  
Juha M. Holopainen
Keyword(s):  
Membrane Fusion ◽  
Lipid Bilayers ◽  
Molecular Level ◽  
Cellular Processes ◽  
Lamellar Phases ◽  
Main Emphasis ◽  
Wide Range ◽  
Lipid Conformation ◽  
Level Fusion

Main emphasis in studies on the mechanisms of fusion of cellular membranes has been in the roles of various proteins, with far less interest in the properties of lipids. Yet, on a molecular level fusion involves the merging of lipid bilayers. Studies so far have revealed lipids forming inverted non-lamellar phases to be important in controlling membrane fusion. However, the underlying molecular level mechanisms have remained controversial. While this review is focused on presenting one possible mechanism, involving so-called extended lipid conformation, we are also advocating the view, that in order to obtain a more complete understanding of this process it is necessary to merge the relevant physicochemical properties of lipids with the models describing the specific functions of proteins. To this end, taking into account the central importance of fusion in a wide range of cellular processes, we may anticipate its control to open novel possibilities also for therapeutic intervention.

The role of counterions on the elasticity of highly charged lamellar phases: A small-angle x-ray and neutron-scattering determination

2005 ◽  
Vol 123 (2) ◽  
pp. 024704 ◽  
Author(s):  
Guillaume Brotons ◽  
Monique Dubois ◽  
Luc Belloni ◽  
Isabelle Grillo ◽  
Theyencheri Narayanan ◽  
...  
Keyword(s):  
Neutron Scattering ◽  
Small Angle ◽  
X Ray ◽  
Lamellar Phases

Long-Range Interactions and Rigidity in Surfaces and Lamellar Phases

1989 ◽  
Vol 177 ◽  
Author(s):  
Mehran Kardar
Keyword(s):  
Phase Behavior ◽  
Long Range ◽  
Experimental Activity ◽  
Lamellar Phases ◽  
Long Range Interactions ◽  
Large Effort

ABSTRACTRecently there has been a large effort to understand the statistical and phase behavior of collections of surfaces and membranes. Experimental activity has focused on the behavior of stacked films in lamellar phases of microemulsions. Here I briefly sumnmarize the role of fluctuations and undulations in four classes of films: fluid, hexatic, solid, and charged.

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