Abstract: A silver halide photographic emulsion which contains at least one of the compounds represented by the following general formula (I), and at least one compound selected from the group consisting of the compounds represented by the general formula (II) and the compounds represented by the general formula (III): General formula (I) ##STR1## wherein R.sub.0 and R.sub.1 may be the same or different, and represent hydrogen atoms, alkyl, aryl, alkoxy, aryloxy groups, halogen atoms, alkoxycarbonyl, acylamino, acyl, cyano carbamoyl, sulfamoyl, carboxyl, or acyloxy groups under the condition that R.sub.0 and R.sub.1 do not represent hydrogen atoms at the same time; R.sub.2 represents a hydrogen atom, alkyl, or aryl, R.sub.3 represents alkyl, aryl, alkoxy, aryloxy, acyl, acyloxy, alkoxycarbonyl, or acylamino group and moreover R.sub.3 is required to be a substituent having such L and B that S value is 544 or less in the equation ofS=3.536L-2.661B+535.4wherein L (its unit is .ANG.

Abstract: A silver halide photosensitive material comprising a support having thereon at least one silver halide emulsion layer comprising tabular grains whose diameter of an average projected area/average thickness ratio is 5/1 or higher is provided. Said emulsion layer contains one or more luminescent dyes whose luminescence quantum yield is 0.3 or more when its concentration is dry gelatin is 10.sup.-4 mol/dm.sup.3 at room temperature and that can be substantially removed by development processing, and the content of said luminescent dye is 3.0 .mu.mol/m.sup.2 or more for the total surface area of the silver halide grains in said emulsion layer, or is 2.0 mmol/dm.sup.3 or more in a hydrophilic dispersion medium excluding the silver halide grain surfaces in said emulsion layer.

Abstract: A reagent suitable for assaying a very small amount of hydrogen peroxide is composed of a moiety having a residue formed by removing one hydrogen from an active methylene group or an active methine group and a fluorescing moiety.Hydrogen peroxide contained in a sample liquid is determined by reacting the sample with the foregoing reagent, a hydrogen donor, and peroxidase and measuring the intensity of the fluorescence emitted from the fluorescing material formed by the reaction.

Abstract: A light-sensitive material comprising a dye containing two or more cyclodextrin groups or derivatives thereof wherein the dye may serve as a spectral sensitizer and optionally, a compound which fluoresces light of a wavelength which can be absorbed by the dye.

Abstract: Several embodiments of cooling arrangements for the pistons of an internal combustion engine operating on a two-cycle, crankcase compression principle. The cooling arrangement comprises a passage that is formed in the piston and which communicates the ports of the engine with each other when the piston is in confronting relationship with them so as to effect a cooling air flow across the piston through the communicating passage.

Abstract: An optical wavelength conversion device is composed of an organic nonlinear optical material, and a cladding layer having a refractive index lower than the refractive index of the organic nonlinear optical material and covering the organic nonlinear optical material, thereby to convert a fundamental wave entering the optical wavelength conversion device to a second harmonic, and to radiate the second harmonic. At least one of device edge faces including edge faces of the organic nonlinear optical material is provided with a shielding layer for shielding the device edge face from ambient atmosphere, thereby to prevent the organic nonlinear optical material from sublimation and deterioration.

Abstract: A method for forming color images and silver halide color photographic material for use therewith are provided by the present invention. The method comprises imagewise exposing a silver halide color photographic material processing with a color developer and then successively processing with a solution having a bleaching ability and having a pH of about 6.5 or less for a period of time of about 75 seconds or less, wherein the silver halide color photographic material contains at least one light-sensitive layer on a support, the light-sensitive layer containing at least one coupler capable of forming a dye by the coupling reaction with the oxidation product of an aromatic primary amine color developing agent and a silver halide emulsion which substantially excludes silver iodide but contains silver chloride in an amount of about 80 mol % or more and which has been spectrally-sensitized with a dye as represented by general formula (I), (II) or (III) described herein.

Abstract: A silver halide photographic material having at least one silver halide emulsion layer having been spectrally sensitized with adsorbable spectral sensitizing dye is disclosed, wherein a hydrophilic dispersion medium contains a substantially non-adsorbable luminescent dye which is easily removable by development processing the satisfies the following conditions (1) to (3):(1) The luminescent dye has an equilibrium adsorption of not more than 5.times.10.sup.-7 mol per m.sup.2 of silver bromide grain surface in a 5% by weight gelatin aqueous solution containing silver bromide grains whose outer surface is composed substantially of a [111] face under conditions of 40.degree. C. in temperature, 6.5.+-.0.05 in pH, and 10.sup.-4 mol/l in dye concentration in the solution phase;(2) The luminescent dye has an emission quantium yield of not less than 0.1 at room temperature in dry gelatin at a concentration of 10.sup.-4 mol/dm.sup.

Abstract: A silver halide photographic emulsion comprising at least one spectral sensitizing dye having the following general formula (I):Dye--J.sup.1 --CONH--J.sup.2 --NHNHG--R (I)wherein Dye represents a dye residue capable of becoming a spectral sensitizing dye; J.sup.1 represents a substituted or unsubstituted alkylene group, a substituted or unsubstituted arylene group, a substituted or unsubstituted aralkylene group, or a substituted or unsubstituted alkarylene group; J.sup.2 represents a substituted or unsubstituted arylene group; R represents hydrogen atom, a substituted or unsubstituted alkyl group, a substituted or unsubstituted aryl group, a substituted or unsubstituted alkoxy group, or a substituted or unsubstituted aryloxy group; and G represents a carbonyl group, a sulfonyl group, a sulfoxy group, a phosphoryl group, or a substituted or unsubstituted iminomethylene group.

Abstract: New phosphoric ester having the following formula (I) and a method for the analysis of an alkaline phosphatase, using the phosphoric ester as a substrate: ##STR1## wherein M is a hydrogen atom or an alkali metal atom; A is phenyl, naphthyl, 2- or 4-pyridyl, 2- or 4-pyrimidyl, pyrazinyl, sym-triazinyl, 2-imidazolyl, 2-oxazolyl, 2-thiazolyl, or sym-thiadiazolyl group which may or may not be substituted with other substituent(s) or may form a condensed ring together with a benzene ring, if possible; B is paraphenylene group or may form naphthylene group by condensation together with a benzene ring, said groups may or may not be substituted with other substituent(s).

Abstract: A number of embodiments of outboard motors incorporating lubricating systems having a filter for filtering gravity flow of lubricant to the engine and for sensing a clogged filter condition. In each embodiment, a warning is given when the filter clogging condition is noted and furthermore there is provided an arrangement for reducing the speed of the engine and accordingly the lubricant consumption in response to such a clogging condition. In addition, the sensing device also provides an indication of the level of lubricant within the reservoir.

Abstract: A novel heat developable light-sensitive material is provided comprising a silver halide spectrally sensitized by a polymethine containing at least one basic nucleus wherein the dye contains, as a group for substituting nitrogen atoms in said basic nucleus, at least one of the groups represented by general formulae (A) and (B): ##STR1##--(CH.sub.2 --.sub.2 NHSO.sub.2 Rwherein m represents an integer of 1 or 2; Y represents an atomic group necessary for the formation of a cyclic imide group; and R represents a C.sub.1-4 alkyl group.In a preferred embodiment, the atomic group represented by Y is selected from the group consisting of a succinic acid imido group, a phthalic acid imido group, an orthobenzosulfimido group, and a maleimido group. The atomic group may be optionally substituted by a halogen atom, a nitro group, a carboxyl group, an acylamino group such as an acetylamino group, or an alkoxycarbonyl amino group such as an ethoxycarbonyl group.

Abstract: A silver halide photographic light-sensitive material and high contrast negative image forming process using them are disclosed. The material comprises a support having thereon at least one silver halide emulsion layer in which said silver halide emulsion layer or other hydrophilic colloid layer contains at least one hydrazine derivative, at least one cationic dye selected from a cyanine dye, a hemicyanine dye and a rhodacyanine dye, and L-ascorbic acid, and has photographic characteristics of giving very high contrast of over 10 in .gamma., giving high practical Dmax and sensitivity, and causing less black peppers using a stable developer and having optimum spectral sensitivity for spectral energy distributions of various light sources.

Abstract: A photoresponsive material containing a dye compound having a cyclodextrin or its derivative as a substituent. The photoresponsive material exhibits increased light absorptivity by increasing the amount of spectral sensitizer, the dye compound. The photoresponsive material is useful as a photographic emulsion and the like.

Abstract: A silver halide photographic emulsion having a high spectral-sensitivity in a red-color wavelength range, especially within a wavelength range of from 600 nm to 690 nm, is disclosed, which contains one or more sensitizing dyes represented by formula (I) ##STR1## wherein R.sub.1, R.sub.2, R.sub.3, and R.sub.4 each represents an alkyl group, a substituted alkyl group, or an alkenyl group;V.sub.1, V.sub.2, V.sub.3, and V.sub.4 each represents a hydrogen atom, a halogen atom, an alkyl group, an alkoxy group, an acyl group, an acyloxy group, an alkoxycarbonyl group, a carboxyl group, an alkoxysulfonyl group, a cyano group, or a trifluoromethyl group;Q represents an alkyl group or an aralkyl group;X.sup..crclbar. represents an anion; andm is 1 or 2, provided that when the dye forms an internal salt, m is 1.

Abstract: A process for forming an image is provided, comprising imagewise exposing a photosensitive material comprising on a support a photosensitive silver halide, a sensitizing dye having general formula (I) and/or (II), and a compound which forms or releases a mobile dye in proportion or counter-proportion to the reduction of the photosensitive silver halide into silver by heating, and transferring the resulting mobile dye to a dye-fixing element in the presence of a hydrophilic solvent,wherein formulas (I) and (II) are: ##STR1## wherein Z.sup.1 and Z.sup.2 represent a group of non-metallic atoms necessary to form a 5- or 6-membered heterocyclic ring; R.sup.1 and R.sup.2 represent a substituted or unsubstituted alkyl group; L.sup.1, L.sup.2, and L.sup.3 represent a substituted or unsubstituted methine group; p and q are equal to 0 or 1; m is equal to 0, 1, 2, or 3; X1.sup..crclbar. represents an anion; k is equal to 0 or 1, with the proviso that the number of organic acid groups contained in the molecule except X1.

Abstract: A silver halide multilayered color photographic light-sensitive material is disclosed. The material is comprised of a support basde having thereon a green-sensitive emulsion layer having a maximum sensitivity of from 535 nm to 555 nm, a blue-sensitive emulsion layer having a maximum sensitivity in the range of 80 to 110 nm shorter than that of the green-sensitive layer and a red-sensitive layer having a maximum sensitivity in the range of 75 to 95 nm longer than that of the green-sensitive layer. The material also contains a compound capable of releasing a diffusible development inhibitor or its precursor by a coupling reaction with the oxidation product of a color developing agent. This compound is present within one of the emulsion layers or a light-insensitive layer adjacent to one of the silver halide emulsion layers. The material undergoes less changes in color reproducibility due to changes in color temperature of a light source upon photographing.

Abstract: A silver halide photographic material having on a support at least one hydrophilic colloid layer and at least one silver halide emulsion layer containing tabular silver halide grains having a grain diameter of at least 5 times the thickness of the grains and at least one compound represented by general formula (I) ##STR1## wherein R.sup.1 represents a methyl group and R.sup.2 represents an alkyl group, a substituted alkyl group, an aryl group, or a substituted aryl group.

Abstract: A heat-developable color light-sensitive material is provided comprising on a support at least a light-sensitive silver halide emulsion, a binder, a compound capable of producing or releasing a mobile dye in direct or inverse proportion to the reaction of the light-sensitive silver halide being reduced into silver at elevated temperatures, and a dye having the general formula: ##STR1## wherein each of R.sup.1 and R.sup.2 is a substituted or unsubstituted alkyl or alkenyl group,R.sup.3 is a hydrogen atom, or substituted or unsubstituted alkyl, alkoxy, aryl or alkenyl group,each of X.sup.1, X.sup.2, X.sup.3, and X.sup.4 is a hydrogen atom, halogen atom, hydroxyl, carboxyl, or substituted or unsubstituted alkyl, alkoxy, alkoxycarbonyl, acyl, acyloxyl, aryl, amino, or acylamino group,X.sup.1 and X.sup.2, and X.sup.3 and X.sup.4 can be mutually combined to form a benzene ring,A.sup.- is an anion, andn is equal to 0 or 1.

Abstract: A silver halide photographic light-sensitive materials are described. In silver halide photographic printing paper comprising at least one silver halide photographic emulsion layer applied to a water impermeable reflective base, the printing paper of the present invention is in the improvement wherein said silver halide emulsion layer is spectrally sensitized with at least one cyanine dye represented by general formulae I and II, and an emulsified dispersion or latex dispersion of a water insoluble fluorescent whitening agent contained in a hydrophilic vehicle of at least one layer applied to the base on the same side as said silver halide emulsion layer: ##STR1## wherein Y.sub.1 and Y.sub.2 each represents an O atom, --N--R.sub.7 or a S atom, wherein R.sub.7 represents a lower alkyl group, A represents H or a lower alkyl group having 4 or less carbon atoms, R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each represents --H, --CH.sub.3, --OCH.sub.3, --C.sub.2 H.sub.5, --OC.sub.2 H.sub.5, --CN, --Cl, --F, --CF.sub.