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1. The typical smectic phase and nematic phase texture can be observed.

2. A spin wave theory of nematic liquid crystals was proposed in this paper.

3. The nematic thermotropic liquid crystalline behaviour of ten kinds of PEAs obtained was studied by polarizing microscope, DSC and X-ray diffraction.

4. A cell theory of nematic liquid crystals is presented, which provides a calculable theoretical model for investigation of molecular short-range correlations.

5. All compounds only exhibit a nematic phase. Their mesomorphic properties and fluoro-substituents effect were studied in detail.

6. Electro - optic effect of twisted nematic liquid crystal was analyzed.

7. Cholesteryl is a good chiral nematic phase mesogen because of its chirality.

8. The cell theory is used to study nematic liquid crystals formed by biaxial molecules.

9. The cell theory of nematic liquid crystals is extended to the case in the presence of a magnetic field.

10. The liquid crystal filter consists of cholesteric and nematic phase liquid crystals with a weight ratio of approximately 7:3.

11. The contrast ratio of reflective bistable twisted nematic displays are optimized by means of a parameter space approach.

12. It was found that all copolyesters are thermotropic nematic liquid crystals with wide mesomorphic temperature range.

13. The calculations of nematic order in liquid crystals with an external magnetic field are made based on the cell theory.

14. Study by polarizing microscopy showed that they were enantiotropic liquid crystals with highly stable smectic A and nematic phases.

15. The most common ones available here are the Twisted Nematic type.

16. A self-assembled film of n- tetradecyl sulfosalt was fabricated in aqueous solution. The nematic liquid crystals could be aligned vertically on the glass substrate with the self-assembled film.

17. The section introduced working principle and manufacture technology of zenithal bistable nematic LCD.

18. Then an anisotropic film was prepared by this method, we used this anisotropic cinnamoyl -modified PVA film as alignment layer of nematic liquid crystals and got a uniform and stable alignment result.

19. A scattering polarizer is prepared by using polymer networks formed from an amorphous monomer, nematic liquid crystals and polyimide coated ITO glass substrates.

20. It was found that the ligand and complex of polymers are thermotropic nematic liquid crystals with wide mesomorphic temperature range.

21. One of them is due to the anisotropic absorption of dye molecules. The other is due to the optical birefringence of liquid crystal in its nematic phase.

22. The results slum that the larger is the pretilt angle of nematic on the orientational layer in the action of the same force field, the more is the degree of the twist distortion.

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23. Applicability of guided mode resonant structures to tunable optical filtering and sensing is demonstrated using nematic liquid crystals.

24. It is found that the compound 3 went into liquid crystal phase when heated to their Tm. The typical smectic phase and nematic phase texture can be observed.

25. The results showed that the polymer is a thermotropic liquid crystal and appeared of nematic and smectic texture.

26. Fresnel zone lens suitable for dynamic focusing in OCT is designed based on optical characteristics of Twisted Nematic Liquid Crystal Spatial light Modulator (TN-LCSLM).

27. Concentrated sulphuric acid was developed to etch the banded texture of thermotropic main chain liquid crystalline copolyester B-N, showing excellent selectivity for this nematic texture.

28. The section introduced working principle, manufacture technology and experiments of twist nematic bistable LCD.

29. We have studied the mechanism of the anisotropic property of degenerate four-wave mixing (DFWM) signal intensity in nematic liquid crystal doped with dye.

30. We develop a function iterative method to solve the complicated equation for the uneven nematic molecular orientational distribution function.