摘要:
A trifluorobenzene derivative having a superior stability and a large positive dielectric anisotropy value and a liquid crystal composition containing the derivative are provided, which derivative is expressed by the formula ##STR1## wherein R is 1-10C alkyl and one --CH.sub.2 -- group or two not-adjacent --CH.sub.2 -- groups in the alkyl may be replaced by O and/or --CO-- and/or --COO-- and/or --CH.dbd.CH--, --A-- and --B-- are 1,4-cyclohexylene, 1,4-phenylene, pyrimidine-2,5-diyl or 1,3-dioxane-2,5-diyl, l and m each are 0, 1 or 2 and l+m.gtoreq.1, and Z.sup.1 and Z.sup.2 each are --COO--, --OCO--, --CH.sub.2 CH.sub.2 --, --OCH.sub.2 --, --CH.sub.2 O--, --CH.dbd.CH-- or single bond and may be same or different.
摘要:
A novel cyclohexane derivative having a good stability, a low viscosity and a large dielectric aniostropy value and a liquid crystal composition containing the same are provided, which derivative is expressed by the formula ##STR1## wherein R represents an alkyl group of 1 to 10 carbon atoms; A represents hydrogen, halogen or cyano group; l represents 1 or 2; and m represents 0 or 1.
摘要:
A novel liquid crystal compound useful as a component of liquid crystal compositions, and particularly suitable to improvement in low temperature characteristics, and a liquid crystal composition containing the compound are provided, which compound is a 2-alkyl-5-[trans-4-(trans-4-alkylcyclohexyl)cyclohexyl]fluorobenzene expressed by the formula ##STR1## wherein R.sup.1 and R.sup.2 each represent an alkyl group of 2 to 10 carbon atoms.
摘要:
A liquid crystal substance having a low viscosity and good compatibility thereof with existing liquid crystals at low temperatures in addition to a large optical anisotropy value and a high clearing point and a liquid crystal composition containing the substance are provided, which substance is a 4-(trans-4-alkylcyclohexylmethyloxy)-4'-substituted-tolan expressed by the formula ##STR1## wherein R.sup.1 is 1-10C alkyl and R.sup.2 is 1-10C alkyl or F or Cl.
摘要:
A novel tolan derivative compound as a liquid crystal substance having a low viscosity and a good compatibility with existing liquid crystals at low temperatures in addition to a large optical anisotropy value and a high clearing point, and a liquid crystal mixture containing the above compound are provided, which compound is expressed by the formula ##STR1## wherein R.sup.1 represents an alkyl group of 1 to 10 carbon atoms, R.sup.2 represents an alkyl group of 1 to 10 carbon atoms, X represents --CH.sub.2 CH.sub.2 -- and A represents an H atom or an F atom.
摘要:
A novel liquid crystal compound useful as a component of liquid crystal compositions and a liquid crystal composition containing the same are provided, which compound is a phenoxypropanol ester derivative expressed by the formula ##STR1## wherein R.sup.1 and R.sup.2 each represent an alkyl group or an alkoxy group each of 1 to 15 carbon atoms, F atom, Cl atom or CN group, but either one of R.sup.1 and R.sup.2 is necessarily said alkyl group or alkoxy group: A represents ##STR2## and B represents ##STR3##
摘要:
Novel liquid crystal compounds, 2-cyano-4-halogenophenyl substituted-benzoates suitable as a component constituting a liquid crystal composition which exhibits a negative dielectric anisotropy, and a liquid crystal composition containing the same are provided, which benzoates are expressed by the formula ##STR1## wherein R represents an alkyl group or an alkoxy group each of 1 to 10 carbon atoms; ##STR2## represents ##STR3## or ##STR4## X and Y each represents H or a halogen atom of F or Cl and at least one of X and Y is necessarily H; and Z represents a halogen atom of F, Cl or Br.
摘要:
A magnetron sputtering target containing a ferromagnetic metal element includes a magnetic phase containing the ferromagnetic metal element; a plurality of non-magnetic phases containing the ferromagnetic metal element, the plurality of non-magnetic phases containing a different constituent element from each other or containing constituent elements at different ratios from each other; and an oxide phase. Regions of the magnetic phase and the plurality of non-magnetic phases are separated from each other by the oxide phase.
摘要:
Compositions and methods for preventing, treating and detecting leishmaniasis are disclosed. The compositions generally comprise Leishmania sterol 24-c-methyltransferase (SMT) polypeptides, portions, variants and/or fusions, as well as polynucleotides encoding SMT polypeptides, portions, variants and/or fusions.
摘要:
To provide a liquid crystal compound having general physical properties required for the compound, namely, a high stability to heat, light and so forth, a small viscosity, a refractive index anisotropy value having a suitable magnitude, a dielectric constant anisotropy value having a suitable magnitude and steep electro-optical characteristics, a wide temperature range of a nematic phase, and an excellent compatibility with other liquid crystal compounds, in particular, a liquid crystal compound having a wide temperature range of the nematic phase; the compound is represented by formula (1): wherein R is alkenyl having 2 to 20 carbons; ring A1 and ring A2 are independently 1,4-cyclohexylene, or 1,4-phenylene in which at least one of hydrogen may be replaced by fluorine; Z1 and Z2 are independently a single bond, —CH2CH2—, —CH═CH—, —CH2O— or —OCH2—; and n is 0 or 1.