scholarly journals Spin Labels in the Gel Phase and Frozen Lipid Bilayers: Do They Truly Manifest a Polarity Gradient?

10.5772/45769 ◽  
2012 ◽  
Author(s):  
Boris Dzikovski ◽  
Jack Free
Keyword(s):  
Lipid Bilayers ◽  
Spin Labels ◽  
Gel Phase

Fluid or gel phase lipid bilayers to study peptide-membrane interactions?

1996 ◽  
Vol 25 (1) ◽  
pp. 55-59 ◽  
Author(s):  
T. Pott ◽  
J. Dufourcq ◽  
E. J. Dufourc
Keyword(s):  
Lipid Bilayers ◽  
Membrane Interactions ◽  
Gel Phase

scholarly journals Variation of thermal conductivity of DPPC lipid bilayer membranes around the phase transition temperature

2017 ◽  
Vol 14 (130) ◽  
pp. 20170127 ◽  
Author(s):  
Sina Youssefian ◽  
Nima Rahbar ◽  
Christopher R. Lambert ◽  
Steven Van Dessel
Keyword(s):  
Phase Transition ◽  
Thermal Conductivity ◽  
Thermal Properties ◽  
Transition Temperature ◽  
Lipid Bilayer ◽  
Lipid Bilayers ◽  
Phase Transition Temperature ◽  
Temperature Gradients ◽  
Phase Behaviour ◽  
Gel Phase

Given their amphiphilic nature and chemical structure, phospholipids exhibit a strong thermotropic and lyotropic phase behaviour in an aqueous environment. Around the phase transition temperature, phospholipids transform from a gel-like state to a fluid crystalline structure. In this transition, many key characteristics of the lipid bilayers such as structure and thermal properties alter. In this study, we employed atomistic simulation techniques to study the structure and underlying mechanisms of heat transfer in dipalmitoylphosphatidylcholine (DPPC) lipid bilayers around the fluid–gel phase transformation. To investigate this phenomenon, we performed non-equilibrium molecular dynamics simulations for a range of different temperature gradients. The results show that the thermal properties of the DPPC bilayer are highly dependent on the temperature gradient. Higher temperature gradients cause an increase in the thermal conductivity of the DPPC lipid bilayer. We also found that the thermal conductivity of DPPC is lowest at the transition temperature whereby one lipid leaflet is in the gel phase and the other is in the liquid crystalline phase. This is essentially related to a growth in thermal resistance between the two leaflets of lipid at the transition temperature. These results provide significant new insights into developing new thermal insulation for engineering applications.

scholarly journals Structural Correlations and Thermodynamics of the Gel Phase in Lipid Bilayers

2012 ◽  
Vol 102 (3) ◽  
pp. 503a
Author(s):  
Richard O. Tjörnhammar ◽  
Olle Edholm
Keyword(s):  
Lipid Bilayers ◽  
Gel Phase

scholarly journals Preferential accumulation of Aβ(1−42) on gel phase domains of lipid bilayers: An AFM and fluorescence study

2007 ◽  
Vol 1768 (1) ◽  
pp. 146-154 ◽  
Author(s):  
A. Choucair ◽  
M. Chakrapani ◽  
B. Chakravarthy ◽  
J. Katsaras ◽  
L.J. Johnston
Keyword(s):  
Lipid Bilayers ◽  
Fluorescence Study ◽  
Preferential Accumulation ◽  
Gel Phase

scholarly journals Lipid Bilayers in the Gel Phase Become Saturated by Triton X-100 at Lower Surfactant Concentrations Than Those in the Fluid Phase

2012 ◽  
Vol 102 (11) ◽  
pp. 2510-2516 ◽  
Author(s):  
Hasna Ahyayauch ◽  
M. Isabel Collado ◽  
Alicia Alonso ◽  
Felix M. Goñi
Keyword(s):  
Lipid Bilayers ◽  
Fluid Phase ◽  
Gel Phase ◽  
Triton X

Fish Antifreeze Glycoproteins Protect Cellular Membranes During Lipid-Phase Transitions

Physiology ◽  
1997 ◽  
Vol 12 (4) ◽  
pp. 189-194
Author(s):  
LM Hays ◽  
RE Feeney ◽  
F Tablin ◽  
AE Oliver ◽  
NJ Walker ◽  
...  
Keyword(s):  
Lipid Bilayers ◽  
Liquid Crystalline ◽  
Antarctic Fish ◽  
Cell Types ◽  
Lipid Phase ◽  
Crystal Formation ◽  
Ice Crystal ◽  
Antifreeze Glycoproteins ◽  
Lipid Phase Transitions ◽  
Gel Phase

Antifreeze proteins from Antarctic fish depress solution freezing temperatures, inhibit ice crystal formation, and prevent recrystallization on rewarming. They have been used to enhance survival of some cell types during hypothermic storage. The mechanism of their protection is thought to be important during the transition of lipid bilayers from a liquid crystalline to a gel phase.

Behavior of spin labels in a variety of interdigitated lipid bilayers

1989 ◽  
Vol 981 (2) ◽  
pp. 243-253 ◽  
Author(s):  
J.M. Boggs ◽  
G. Rangaraj ◽  
A. Watts
Keyword(s):  
Lipid Bilayers ◽  
Spin Labels

Effect of intra-membrane C60 fullerenes on the modulus of elasticity and the mechanical resistance of gel and fluid lipid bilayers

Nanoscale ◽  
2015 ◽  
Vol 7 (40) ◽  
pp. 17102-17108 ◽  
Author(s):  
Jihan Zhou ◽  
Dehai Liang ◽  
Sonia Contera
Keyword(s):  
Light Scattering ◽  
Lipid Bilayers ◽  
Modulus Of Elasticity ◽  
Mechanical Resistance ◽  
Afm Imaging ◽  
Gel Phase ◽  
C60 Fullerenes

AFM imaging and nanoindentation complemented by FTIR and light scattering revealed the effect of intramembrane fullerene C60 on fluid and gel phase lipid bilayers.

scholarly journals EPR spectra of spin labels in lipid bilayers. II. Rotation of steroid spin probes

1974 ◽  
Vol 61 (7) ◽  
pp. 2946-2949 ◽  
Author(s):  
Hansgeorg Schindler ◽  
Joachim Seelig
Keyword(s):  
Lipid Bilayers ◽  
Epr Spectra ◽  
Spin Labels ◽  
Spin Probes

X- and Q-Band Electron Spin Echo Study of Stochastic Molecular Librations of Spin Labels in Lipid Bilayers

2012 ◽  
Vol 44 (1-2) ◽  
pp. 133-142 ◽  
Author(s):  
N. P. Isaev ◽  
M. V. Fedin ◽  
S. A. Dzuba
Keyword(s):  
Lipid Bilayers ◽  
Electron Spin ◽  
Spin Echo ◽  
Electron Spin Echo ◽  
Spin Labels ◽  
Band Electron
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