Structure of hard-core models for liquid crystals [Erratum to document cited in CA108(26):230017P]

1988 ◽  
Vol 92 (18) ◽  
pp. 5314-5314 ◽  
Author(s):  
Daan Frenkel
Keyword(s):  
Liquid Crystals ◽  
Hard Core

Statistical Theory on Polymer Liquid Crystals

1996 ◽  
Vol 425 ◽  
Author(s):  
Hatsuo Kimura
Keyword(s):  
Liquid Crystals ◽  
Main Chain ◽  
Molecular Model ◽  
Hard Core ◽  
Isotropic Phase ◽  
Polymer Liquid ◽  
Composite Systems ◽  
Polymer Liquid Crystals ◽  
Crystal Composite ◽  
Polymer Liquid Crystal

AbstractBased on common molecular model, polymer liquid crystals of hard-rod and flexible main-chain are studied statistical mechanically. The hard-core repulsion and also the attractive potentials are assumed between molecules. The nematic-isotropic phase transitions, and molecular orientations at interfaces in polymers and polymer-liquid crystal composite systems are discussed.

Effect of elastic constants of liquid crystals in their electro-optical properties

2017 ◽  
Vol 14 (11) ◽  
pp. 1750163
Author(s):  
Z. Parang ◽  
T. Ghaffary ◽  
M. M. Gharahbeigi
Keyword(s):  
Optical Properties ◽  
Liquid Crystals ◽  
Elastic Constants ◽  
Density Functional ◽  
Hard Spheres ◽  
Hard Core ◽  
Molecular Fluids ◽  
Dipolar Fluid ◽  
The Density Functional Theory ◽  
Complex Liquids

Recently following the success of the density functional theory (DFT) in obtaining the structure and thermodynamics of homogeneous and inhomogeneous classical systems such as simple fluids, dipolar fluid and binary hard spheres, this theory was also applied to obtain the density profile of a molecular fluid in between hard planar walls by Kalpaxis and Rickayzen. In the theory of molecular fluids, the direct correlation function (DCF) can be used to calculate the equation of state, free energy, phase transition, elastic constants, etc. It is well known that the hard core molecular models play an important role in understanding complex liquids such as liquid crystals. In this paper, a classical fluid of nonspherical molecules is studied. The required homogeneous (DCF) is obtained by solving Orenstein–Zernike (OZ) integral equation numerically. Some of the molecules in the liquid crystals have a sphere shape and this kind of molecular fluid is considered here. The DCF sphere of the molecular fluid is calculated and it will be shown that the results are in good agreement with the pervious works and the results of computer simulation. Finally the electro-optical properties of ellipsoid liquid crystal using DCF of these molecules are calculated.

Structure of hard-core models for liquid crystals

1988 ◽  
Vol 92 (11) ◽  
pp. 3280-3284 ◽  
Author(s):  
Daan Frenkel
Keyword(s):  
Liquid Crystals ◽  
Hard Core

The Structure and Development of Microbodies in the Fat Body and other Tissues of an Insect (Calpodes Ethlius)

1970 ◽  
Vol 28 ◽  
pp. 148-149
Author(s):  
M. Locke ◽  
J. T. McMahon
Keyword(s):  
Electron Microscopy ◽  
Liquid Crystals ◽  
Fat Body ◽  
Competitive Inhibitor ◽  
Dense Core ◽  
Urate Oxidase ◽  
Blood Proteins ◽  
Free Base ◽  
The Core ◽  
The Matrix

The fat body of insects has always been compared functionally to the liver of vertebrates. Both synthesize and store glycogen and lipid and are concerned with the formation of blood proteins. The comparison becomes even more apt with the discovery of microbodies and the localization of urate oxidase and catalase in insect fat body.The microbodies are oval to spherical bodies about 1μ across with a depression and dense core on one side. The core is made of coiled tubules together with dense material close to the depressed membrane. The tubules may appear loose or densely packed but always intertwined like liquid crystals, never straight as in solid crystals (Fig. 1). When fat body is reacted with diaminobenzidine free base and H2O2 at pH 9.0 to determine the distribution of catalase, electron microscopy shows the enzyme in the matrix of the microbodies (Fig. 2). The reaction is abolished by 3-amino-1, 2, 4-triazole, a competitive inhibitor of catalase. The fat body is the only tissue which consistantly reacts positively for urate oxidase. The reaction product is sharply localized in granules of about the same size and distribution as the microbodies. The reaction is inhibited by 2, 6, 8-trichloropurine, a competitive inhibitor of urate oxidase.

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