Ternary Phase Diagram of Mixtures of Palmitoyl-oleoyl-phosphatidylcholine, Tetraoxyethylene Dodecyl Ether, and Heavy Water as Seen by 31P and 2H NMR

Klose, G.; Eisenblätter, S.; König, Bernd

doi:10.1006/jcis.1995.1274

Cited by 21 publications

(26 citation statements)

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“…Our results indicate myristoyl chains and thus higher L k stability in contrast to the longer palmitoyl chains. On the other hand, the pronounced an interaction between the ethoxy-hydroxyl and lipid phosphate groups and the surfactant-induced dehydration of the dependence of hydration of the ethoxy chains on the absolute temperature (13,14,43) may cause destabilization of the carbonyl group of DMPC. This position was found to affect the molecular arrangement in an exceptionally sensitive gel complex at higher temperatures, which are reached in DPPC but not in DMPC membranes due to the lower chain manner because of its pivotal location near the polar/apolar interface (61).…”

Section: O-p-o-c Fragment (45) In Aqueous Monooleylglycerol/ Dopc MImentioning

confidence: 98%

Compound Complex Formation in Phospholipid Membranes Induced by a Nonionic Surfactant of the Oligo(ethylene oxide)–Alkyl Ether Type: A Comparative DSC and FTIR Study

Mädler

Binder²,

Klose³

1998

Journal of Colloid and Interface Science

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Section: O-p-o-c Fragment (45) In Aqueous Monooleylglycerol/ Dopc MImentioning

confidence: 98%

Compound Complex Formation in Phospholipid Membranes Induced by a Nonionic Surfactant of the Oligo(ethylene oxide)–Alkyl Ether Type: A Comparative DSC and FTIR Study

Mädler

Binder²,

Klose³

1998

Journal of Colloid and Interface Science

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“…A complete description of the ternary system (surfactant, lipid, water) at a given temperature and pressure is possible by a triangular phase diagram. Published examples are the system C 12 EO 4 –POPC–D 2 O (Klose et al 1995), TX100–lecithin–water (Sadaghiani et al 1989) and EPC–C 16 TAC–brine and EPC–C 12 TAC–brine (Gustafsson et al 1997). Very detailed studies on water sorption to C 12 EO n detergents are available; at 97% relative humidity, the number of water molecules adsorbed from vapour increases linearly with a slope of ∼2·3 water per EO unit between at least n =2 and 7 and over a broad range of detergent contents in the membrane (Konig et al 1997).…”

Section: Solubilisation Reconstitution Non-lamellar Phasesmentioning

confidence: 99%

Interactions of surfactants with lipid membranes

Heerklotz

2008

Quart. Rev. Biophys.

281

287

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Surfactants are surface-active, amphiphilic compounds that are water-soluble in the micro- to millimolar range, and self-assemble to form micelles or other aggregates above a critical concentration. This definition comprises synthetic detergents as well as amphiphilic peptides and lipopeptides, bile salts and many other compounds. This paper reviews the biophysics of the interactions of surfactants with membranes of insoluble, naturally occurring lipids. It discusses structural, thermodynamic and kinetic aspects of membrane-water partitioning, changes in membrane properties induced by surfactants, membrane solubilisation to micelles and other phases formed by lipid-surfactant systems. Each section defines and derives key parameters, mentions experimental methods for their measurement and compiles and discusses published data. Additionally, a brief overview is given of surfactant-like effects in biological systems, technical applications of surfactants that involve membrane interactions, and surfactant-based protocols to study biological membranes.

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“…Here, diverse non-lamellar phases, such as hexagonal, inverse-hexagonal or inverse micellar phases can be observed at ambient temperatures when hydration is sufficiently reduced (Koynova and Tenchov 2001;Klose et al 1995a;Funari et al 1996;Pfeiffer et al 2012). In native systems, the transition into non-lamellar phases denatures membranes as such which is considered to be a major factor of concern in cryobiology.…”

Section: Phase Behaviour At Low Hydrationmentioning

confidence: 97%

Hydration Forces Between Lipid Bilayers: A Theoretical Overview and a Look on Methods Exploring Dehydration

Pfeiffer

2015

Subcellular Biochemistry

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Although, many biological systems fulfil their functions under the condition of excess hydration, the behaviour of bound water as well as the processes accompanying dehydration are nevertheless important to investigate. Dehydration can be a result of applied mechanical pressure, lowered humidity or cryogenic conditions. The effort required to dehydrate a lipid membrane at relatively low degree of hydration can be described by a disjoining pressure which is called hydration pressure or hydration force. This force is short-ranging (a few nm) and is usually considered to be independent of other surface forces, such as ionic or undulation forces. Different theories were developed to explain hydration forces that are usually not consistent with each other and which are also partially in conflict with experimental or numerical data.Over the last decades it has been more and more realised that one experimental method alone is not capable of providing much new insight into the world of such hydration forces. Therefore, research requires the comparison of results obtained from the different methods. This chapter thus deals with an overview on the theory of hydration forces, ranging from polarisation theory to protrusion forces, and presents a selection of experimental techniques appropriate for their characterisation, such as X-ray diffraction, atomic force microscopy and even calorimetry.

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Ternary Phase Diagram of Mixtures of Palmitoyl-oleoyl-phosphatidylcholine, Tetraoxyethylene Dodecyl Ether, and Heavy Water as Seen by 31P and 2H NMR

Cited by 21 publications

References 0 publications

Compound Complex Formation in Phospholipid Membranes Induced by a Nonionic Surfactant of the Oligo(ethylene oxide)–Alkyl Ether Type: A Comparative DSC and FTIR Study

Compound Complex Formation in Phospholipid Membranes Induced by a Nonionic Surfactant of the Oligo(ethylene oxide)–Alkyl Ether Type: A Comparative DSC and FTIR Study

Interactions of surfactants with lipid membranes

Hydration Forces Between Lipid Bilayers: A Theoretical Overview and a Look on Methods Exploring Dehydration

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