The purpose of the present invention is to provide: a high-performance polarizing plate which functions for light in an infrared wavelength range; and a liquid-crystal display device or the like comprising the same.

Provided is a polarizing plate for an infrared range, which is a stretched film containing a dye exhibiting absorption in an infrared range, the film exhibiting dichroism.

The present invention pertains to: an oxidation color developable compound that is represented by general formula (1), that has excellent solubility in water, and that is less affected by a substance coexisting in a sample; and an oxidation color development reagent using the oxidation color developable compound. In general formula (I), R.sup.1, R.sup.2, R.sup.3, and R.sup.4 each represent a straight-chain or branched alkyl group having 1-6 carbon atoms, X represents a hydrophilic functional group, and L represents (CH.sub.2).sub.j (j represents an integer of 2-10), (CH.sub.2CH.sub.2O).sub.k (k represents an integer of 1-10), or (CH.sub.2).sub.mZ(CH.sub.2).sub.n (m and n each independently represent an integer of 1-10, and Z represents N.sup.+(CH.sub.3).sub.2, CONH, NHCO, COO, OCO, NHCOO, OCONH, NHCONH, and (CH.sub.2NHCO).sub.q).

Compositions include an aqueous solution of an organic dye of molecular weight in the range of about 300 to about 1,000 and a density-enhancing material. An amount of the density-enhancing material in the aqueous solution is sufficient to achieve a density of about 1.0 to about 1.3 g/mL. The composition has a viscosity of about 3.5 to about 5.0 centipoise. The compositions are useful in assessing the adequacy of a liquid handling mixing device to mix a reaction mixture.

The present invention relates to storage-stable dye salts, solutions and compositions thereof a process for their preparation and their use for dyeing and/or printing substrates.

Edible colorant compositions containing a monoacylated anthocyanin of Compound I and methods of use are provided. The colorant compositions include at least the monoacylated anthocyanin colorant of Compound I extracted from red cabbage and a metal ion, and have a pH from about 6.0 to about 8.0. The colorant compositions can be derived from a non-artificial product and provide a stable, blue colorant that can be used in food products. Specifically, the monoacylated anthocyanin colorant provides color characteristics similar to those provided by the artificial blue colorant, FD&C Blue No. 1.

The present invention provides a colored sweet potato that has a high anthocyanin content, and that is useful as a pigment material. Further, the present invention also provides a processed product of the colored sweet potato useful as a purple pigment, more specifically, an extract composition, as well as the purified matter thereof (including roughly purified matter).

A colored sweet potato having the following characteristics is used. (A) the color value (530 nm) per gram of wet weight of colored sweet potato (color value (530 nm)/g) is not less than 15; (B) the absorbance ratio (320 nm/530 nm) per gram of wet weight of colored sweet potato (absorbance ratio (320 nm/530 nm)/g) is not less than 1.5; (C) color value (530 nm)/gabsorbance ratio (320 nm/530 nm)/g=not less than 30; and (D) LTR retrotransposon (Rtsp-1) is inserted into at least two positions of the genome sequence, and an amplified product having a fragment length of 500 to 530 bp is produced when a nucleic acid amplification reaction is performed using, as a test material, a part of a plant, and at least one of primer set 1 containing a forward primer having the base sequence of SEQ ID NO:1 and a reverse primer having the base sequence of SEQ ID NO:2, and primer set 2 containing a forward primer having the base sequence of SEQ ID NO:1 and a reverse primer having the base sequence of SEQ ID NO:3.

To provide an optical filter having shielding effects against near ultraviolet rays and near infrared rays. An optical filter comprising a transparent resin body having a single layer or multilayer structure, and containing a near ultraviolet absorbing dye (U) which is a compound represented by the following formula (U) and which has an absorption maximum at a wavelength of from 370 to 425 nm and has a molar absorptivity at the maximum absorption wavelength of at least 50,000 [L/(mol.Math.cm)], and a near infrared absorbing dye (A) which has an absorption maximum at a wavelength of from 600 to 800 nm:

##STR00001##

In the formula (U), Y is an oxygen atom, a methylene group or a dimethylene group, R.sup.1 is a monovalent hydrocarbon group which may have a substituent, or the like, R.sup.2 to R.sup.5 are a hydrogen atom, an alkyl group, an alkoxy group or the like, and X is a bivalent group represented by any one of the formulae (X1) to (X5) or the like.

Stable organic peroxide compositions include at least one organic peroxide (e.g., tert-butyl hydroperoxide), at least one dye (e.g., an FD&C dye), and at least one alcohol (e.g., propylene glycol, tert-butanol, and/or glycerin).

Provided are a photoelectric conversion element including an electrically conductive support, a photoconductor layer including an electrolyte, a charge transfer layer including an electrolyte, and a counter electrode. The photoconductor layer has semiconductor fine particles having a metal complex dye represented by specific Formula (1) supported thereon; a dye-sensitized solar cell; a metal complex dye; a dye solution; and an oxide semiconductor electrode.

To provide an optical filter having shielding effects against near ultraviolet rays and near infrared rays. An optical filter comprising a transparent resin body having a single layer or multilayer structure, and containing a near ultraviolet absorbing dye (U) which is a compound represented by the following formula (U) and which has an absorption maximum at a wavelength of from 370 to 425 nm and has a molar absorptivity at the maximum absorption wavelength of at least 50,000 [L/(mol.Math.cm)], and a near infrared absorbing dye (A) which has an absorption maximum at a wavelength of from 600 to 800 nm: ##STR00001##
In the formula (U), Y is an oxygen atom, a methylene group or a dimethylene group, R.sup.1 is a monovalent hydrocarbon group which may have a substituent, or the like, R.sup.2 to R.sup.5 are a hydrogen atom, an alkyl group, an alkoxy group or the like, and X is a bivalent group represented by any one of the formulae (X1) to (X5) or the like.