Demonstration of the antiferroelectric aspect of the helical superstructures in Sm-C*, Sm-Cα*, and Sm-Ca*liquid crystals
نویسندگان
چکیده
منابع مشابه
Antiferroelectric liquid-crystal mixture without smectic layer shrinkage at the direct Sm-A*-Sm-C(*)(a) transition.
We report results of x-ray, optic, electro-optic, and dielectric investigations on an antiferroelectric liquid-crystal mixture exhibiting a direct second-order phase transition between the Sm-A* and Sm-C(*)(a) phases with virtually no shrinkage in the smectic layer spacing. The birefringence measurements and texture observations suggest that the phase transition follows the diffuse cone model o...
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The neoclassical model of Sm-C (and Sm-C*) elastomers developed by Warner and Adams predicts a class of "soft" (zero energy) deformations. We find and describe the full set of stripe domains-laminate structures in which the laminates alternate between two different deformations-that can form between pairs of these soft deformations. All the stripe domains fall into two classes, one in which the...
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A new type of gauge extension of the SM is proposed. It is based on a SU (2) × SU (2) × U (1) group with the peculiarity that the gauge bosons of the extra SU (2) do not couple to fermions. This feature relaxes some of the constraints on the masses of the new gauge bosons, leaving the possibility of having lighter masses than in traditional extensions. The model exhibits several interesting pro...
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15 صفحه اولTwo MCAT elements of the SM α-actin promoter function differentially in SM vs. non-SM cells.
Transcriptional activity of the smooth muscle (SM) α-actin gene is differentially regulated in SM vs. non-SM cells. Contained within the rat SM α-actin promoter are two MCAT motifs, binding sites for transcription enhancer factor 1 (TEF-1) transcriptional factors implicated in the regulation of many muscle-specific genes. Transfections of SM α-actin promoter-CAT constructs containing wild-type ...
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ژورنال
عنوان ژورنال: Physical Review E
سال: 2005
ISSN: 1539-3755,1550-2376
DOI: 10.1103/physreve.71.051703