Polymerization of a diacetylenic phospholipid monolayer at the air-water interface

1994 ◽  
Vol 4 (1) ◽  
pp. 37-58 ◽  
Author(s):  
L. Bourdieu ◽  
D. Chatenay ◽  
J. Daillant ◽  
D. Luzet
Keyword(s):  
Water Interface ◽  
Phospholipid Monolayer ◽  
Air Water Interface

Ellipsometric study of a phospholipid monolayer at the air–water interface in presence of large organic counter ions

2005 ◽  
Vol 488 (1-2) ◽  
pp. 247-253 ◽  
Author(s):  
Marta Pérez-Morales ◽  
José M. Pedrosa ◽  
Eulogia Muñoz ◽  
María T. Martín-Romero ◽  
Dietmar Möbius ◽  
...  
Keyword(s):  
Water Interface ◽  
Phospholipid Monolayer ◽  
Counter Ions ◽  
Air Water Interface ◽  
Ellipsometric Study

scholarly journals Ubiquinones have surface-active properties suited to transport electrons and protons across membranes

1980 ◽  
Vol 185 (3) ◽  
pp. 715-722 ◽  
Author(s):  
Peter J. Quinn ◽  
Manouchehre A. Esfahani
Keyword(s):  
Fatty Acyl ◽  
Side Chain ◽  
Water Interface ◽  
Collapse Pressure ◽  
Phospholipid Monolayer ◽  
Ideal Mixing ◽  
Surface Active Properties ◽  
Air Water Interface ◽  
Surface Active ◽  
Ubiquinone 10

Surface-active properties of ubiquinones and ubiquinols have been investigated by monomolecular-film techniques. Stable monolayers are formed at an air/water interface by the fully oxidized and reduced forms of the coenzyme; collapse pressures and hence stability of the films tend to increase with decreasing length of the isoprenoid side chain and films of the reduced coenzymes are more stable than those of their oxidized counterparts. Ubiquinone with a side chain of two isoprenoid units does not form stable monolayers at the air/water interface. Mixed monolayers of ubiquinol-10 or ubiquinone-10 with 1,2-dimyristoyl phosphatidylcholine, soya phosphatidylcholine and diphosphatidylglycerol do not exhibit ideal mixing characteristics. At surface pressures less than the collapse pressure of pure ubiquinone-10 monolayers (approx. 12mN·m−1) the isoprenoid chain is located substantially within the region occupied by the fatty acyl residues of the phospholipids. With increasing surface pressure the ubiquinones and their fully reduced equivalents are progressively squeezed out from between the phospholipid molecules until, at a pressure of about 35mN·m−1, the film has surface properties consistent with that of the pure phospholipid monolayer. This suggests that the ubiquinone(ol) forms a separate phase overlying the phospholipid monolayer. The implications of this energetically poised situation, where the quinone(ol) is just able to penetrate the phospholipid film, are considered in terms of the function of ubiquinone(ol) as electron and proton carriers of energy-transducing membranes.

Oriented growth of KH2PO4 crystals at the air/water interface covered with a phospholipid monolayer

1999 ◽  
Vol 441 (2-3) ◽  
pp. 436-440 ◽  
Author(s):  
Bin Li ◽  
Yubai Bai ◽  
Nan Lu ◽  
Wenqin Pang ◽  
Ruren Xu
Keyword(s):  
Water Interface ◽  
Oriented Growth ◽  
Phospholipid Monolayer ◽  
Air Water Interface
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