 Microbiological process for controlling the productivity of cultivated plants |
| We claim: 1. A microbiological process for controlling the productivity of cultivated plants, which ... |
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| Soil conditioners |
| OF THE PREFERRED EMBODIMENTS The soil conditioner of the present invention comprises 4 to 4.75 ... |
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| Method for the manufacture of fodder and/or soil improving agents from waste material |
| OF THE INVENTION The method according to the invention, basically, resides in that the ... |
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| Method of bioconversion of industrial or agricultural cellulose containing wastes |
| OF SPECIFIC EMBODIMENTS With reference to FIG. 1, schematically presented there is a flow chart ... |
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| Biological process for preparing optically active lactic acid |
| OF THE INVENTION The microorganism used in the present invention is a microorganism belonging to ... |
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| Biological process for producing .alpha.-hydroxyamide or .alpha.-hydroxy acid |
| OF THE INVENTION A sulfite ion, a disulfite ion or a dithionite ion added to the reaction system ... |
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| Process for producing a-hydroxy acid or a-hydroxyamide by microorganism |
| OF THE INVENTION In the present invention, the aldehyde, prussic acid, .alpha.-hydroxynitrile and ... |
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| Process for preparing .alpha.-hydroxy acids using microorganism and novel microorganism |
| What is claimed is: 1. A method for producing compounds represented by a general formula [II], RCH(O... |
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| Modification of pigment charge characteristics |
| What is claimed is: 1. A positively charged dry electrophotographic developer composition comprised ... |
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Tolan-type nematic liquid crystalline compounds
| Details |
Inventors: Takatsu, Haruyoshi; Sasaki, Makoto; Tanaka, Yasuyuki; Sato, Hisato;
Assignee: Dainippon Ink and Chemicals, Inc. (Tokyo, JP)
Primary Examiner: Gron; Teddy S.
Assistant Examiner: Thomas; J. E.
Attorney, Agent or Firm: Sherman and Shalloway
A liquid crystalline compound of the general formula ##STR1## wherein ##STR2## R and R', independently from each other, represent a linear alkyl group having 1 to 10 carbon atoms, an alkoxymethylene group whose alkoxy moiety has 1 to 10 carbon atoms, a cyano group or a halogen atom, and n and m, independently from each other, represent 0 or 1. |
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DETAILED DESCRIPTION What is claimed is: 1.
A compound of the general formula ##STR184## wherein R represents a linear alkyl group having 1 to 10 carbon atoms, R' represents a halogen atom or a linear alkyl group having 1 to 10 carbon atoms, and the dioxane ring has a trans configuration.
2.
The compound of claim 1 wherein R is n-C.
sub.
3 H.
sub.
7 and R' is n-C.
sub.
4 H.
sub.
9.
3.
The compound of claim 1 wherein R is n-C.
sub.
3 H.
sub.
7 and R' is F.
4.
The compound of claim 1 wherein R is n-C.
sub.
6 H.
sub.
13 and R' is n-C.
sub.
4 H.
sub.
9.
5.
The compound of claim 1 wherein R is n-C.
sub.
6 H.
sub.
13 and R' is F.
Description:
This invention relates to novel tolan derivatives useful as an electrooptical display material.
The novel tolan derivatives provided by this invention are compounds of the general formula ##STR3## wherein ##STR4## R and R', independently from each other, represent a linear alkyl group having 1 to 10 carbon atoms, an alkoxymethylene group whose alkoxy moiety has 1 to 10 carbon atoms, a cyano group or a halogen atom, and n and m, independently from each other, represent 0 or 1, and are referred to hereinafter as the compounds of formula (I).
Typical liquid crystal display cells include a field effect mode cell proposed by M.
Schadt et al.
[APPLIED PHYSICS LETTERS, 18, 127-128 (1971)], a dynamic scattering mode cell proposed by G.
H.
Heilmeier et al.
[PROCEEDINGS OF THE I.
E.
E.
E.
, 56, 1162-1171 (1968)], and a guest-host mode cell proposed by G.
H.
Heilmeier et al.
[APPLIED PHYSICS LETTERS, 13, 91 (1968)] or D.
L.
White et al.
[JOURNAL OF APPLIED PHYSICS, 45, 4718 (1974)].
Among these liquid crystalline cells, a TN-type cell, a kind of the field effect mode cell, is now most prevailing.
As reported by G.
Bauer in Mol.
Cryst.
Liq.
Cryst.
63, 45 (1981), the product of the thickness (d in micrometers) of the TN-type cell multiplied by the anisotropy (.
DELTA.
n) of the refractive index of a liquid crystalline material filled in the cell should be preset at a specified value in order to prevent the occurrence of interference fringes on the cell surface which impair the appearance of the cell
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Molecular Biology 
