Synthesis, interfacial property, and application of new hybrid anion surfactant containing fluorocarbon and hydrocarbon chains

1978 ◽

Vol 36 (2) ◽

pp. 290-291

Author(s):

S. W. Hui ◽

T. P. Stewart

Keyword(s):

Lipid Membranes ◽

Structural Information ◽

Freeze Fracture ◽

Biological Molecules ◽

Vacuum Drying ◽

Direct Visualization ◽

X Ray Diffraction ◽

Electron Microscopic ◽

X Ray ◽

Hydrocarbon Chains

Direct electron microscopic study of biological molecules has been hampered by such factors as radiation damage, lack of contrast and vacuum drying. In certain cases, however, the difficulties may be overcome by using redundent structural information from repeating units and by various specimen preservation methods. With bilayers of phospholipids in which both the solid and fluid phases co-exist, the ordering of the hydrocarbon chains may be utilized to form diffraction contrast images. Domains of different molecular packings may be recgnizable by placing properly chosen filters in the diffraction plane. These domains would correspond to those observed by freeze fracture, if certain distinctive undulating patterns are associated with certain molecular packing, as suggested by X-ray diffraction studies. By using an environmental stage, we were able to directly observe these domains in bilayers of mixed phospholipids at various temperatures at which their phases change from misible to inmissible states.

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Impact of Surface Treatments and Post-Deposition Annealing Upon Interfacial Property of ALD-Al₂O₃ on a-Plane GaN

IEEE Journal of the Electron Devices Society ◽

10.1109/jeds.2020.3020893 ◽

2020 ◽

Vol 8 ◽

pp. 970-975 ◽

Cited By ~ 1

Author(s):

Yanni Zhang ◽

Jincheng Zhang ◽

Zhuangzhuang Hu ◽

Zhaoqing Feng ◽

Hepeng Zhang ◽

...

Keyword(s):

Surface Treatments ◽

Interfacial Property ◽

Post Deposition Annealing ◽

Post Deposition

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Influence of fiber surface-treatment on interfacial property of poly(l-lactic acid)/ramie fabric biocomposites under UV-irradiation hydrothermal aging

Materials Chemistry and Physics ◽

10.1016/j.matchemphys.2011.01.035 ◽

2011 ◽

Vol 126 (3) ◽

pp. 524-531 ◽

Cited By ~ 28

Author(s):

Dakai Chen ◽

Jing Li ◽

Jie Ren

Keyword(s):

Lactic Acid ◽

Surface Treatment ◽

Uv Irradiation ◽

Fiber Surface ◽

Interfacial Property ◽

Hydrothermal Aging ◽

Fiber Surface Treatment

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Molecular Dynamics Simulation Study of Lecithin Inhibiting Hydrate-Dissociation

Materials Science Forum ◽

10.4028/www.scientific.net/msf.890.252 ◽

2017 ◽

Vol 890 ◽

pp. 252-259

Author(s):

Le Wang ◽

Guan Cheng Jiang ◽

Xin Lin ◽

Xian Min Zhang ◽

Qi Hui Jiang

Keyword(s):

Molecular Dynamics ◽

Water Movement ◽

Simulation Analysis ◽

Mass Density ◽

Dynamics Simulation ◽

Dissociation Process ◽

Hydrate Dissociation ◽

Hydrocarbon Chains ◽

Dynamics Simulations ◽

Mass Density Profile

Molecular dynamics simulations are used to study the dissociation inhibiting mechanism of lecithin for structure I hydrates. Adsorption characteristics of lecithin and PVP (poly (N-vinylpyrrolidine)) on the hydrate surfaces were performed in the NVT ensemble at temperatures of 277K and the hydrate dissociation process were simulated in the NPT ensemble at same temperature. The results show that hydrate surfaces with lecithin is more stable than the ones with PVP for the lower potential energy. The conformation of lecithin changes constantly after the balanced state is reached while the PVP molecular dose not. Lecithin molecule has interaction with lecithin nearby and hydrocarbon-chains of lecithin molecules will form a network to prevent the diffusion of water and methane molecules, which will narrow the available space for hydrate methane and water movement. Compared with PVP-hydrate simulation, analysis results (snapshots and mass density profile) of the dissociation simulations show that lecithin-hydrate dissociates more slowly.

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