Abstract: A dispersion of metal oxide fine particles, containing metal oxide fine particles, a strong acid and an aqueous solution, wherein the metal oxide fine particles and the strong acid are dispersed in an aqueous solution containing alcohol, and the dispersion of metal oxide fine particles has a light transmittance at 800 nm wavelength of 90% or more.

Abstract: To provide a method for producing a dispersion of metal oxide fine particles including subjecting a titanium oxide precursor to heat treatment in the presence of an acid so as to prepare a dispersion of titanium oxide fine particles, mixing a metal oxide precursor with the dispersion of titanium oxide fine particles so as to form a mixture, and subjecting the mixture to heat treatment so as to form metal oxide fine particles, wherein the titanium oxide fine particles have a particle diameter of 0.5 nm to 5 nm.

Abstract: An aqueous dispersion of metal oxide fine particles, including metal oxide fine particles, a carboxylic compound and an acid compound containing a bulky anion having B value of ?0.01 or less in Equation (1), wherein the metal oxide fine particles, the carboxylic compound and the acid compound containing a bulky anion are dispersed in an aqueous solution, and the aqueous dispersion of metal oxide fine particles has a light transmittance at 800 nm wavelength of 90% or more: ?=?0(1+A?c+Bc) ??Equation (1) where ? represents a viscosity of a solution, ?0 represents a viscosity of a solvent, A and B respectively represent an inherent constant value of an acid, and c represents a concentration of the solution.

Abstract: A method of processing, with a developer in which a solution physical development arises, a silver halide photosensitive material containing a compound capable of undergoing a one-electron oxidation to thereby form a one-electron oxidation product thereof which belongs to the following types 1 to 4: Type 1: the one-electron oxidation product being capable of releasing further two or more electrons accompanying a subsequent bond cleavage reaction; Type 2: the one-electron oxidation product being capable of releasing further one electron accompanying a subsequent bond cleavage reaction, and the compound having, in its molecule, two or more groups adsorptive to silver halide; Type 3: the one-electron oxidation product being capable of releasing further one or more electrons after going through a subsequent bond forming reaction; and Type 4: the one-electron oxidation product being capable of releasing further one or more electrons after going through a subsequent intramolecular ring cleavage reaction.

Abstract: A silver halide photographic material is disclosed, comprising at least one silver halide emulsion layer provided on a support, the emulsion layer comprising a silver halide emulsion containing at least two sensitizing dyes represented by the following general formula (I): wherein X represents an oxygen atom, sulfur atom, selenium atom or NR′; R and R′ each represent a substituted or unsubstituted alkyl, aryl or heterocyclic group; D represents a group required to form a methine dye; M represents a counter ion; and m represents a number of not smaller than 0 required to neutralize the electric charge in the molecule.

Abstract: A silver halide photographic material is disclosed, comprising at least one silver halide emulsion layer provided on a support, the emulsion layer comprising a silver halide emulsion containing at least two sensitizing dyes represented by the following general formula (I): 1

Abstract: A silver halide photographic light-sensitive material is described, comprising at least one compound represented by the following formula (I): wherein Z1 and Z2 each represents oxygen atom, sulfur atom, selenium atom, tellurium atom or a >NR group, R represents an alkyl group, an aryl group or a heterocyclic group, L1, L2 and L3 each represents a methine group, n1 represents 0 1, 2 or 3, V1, V2, V3, V4, W1, W2, W3 and W4 each represents hydrogen atom or a substituent, provided that two substituents may be combined with each other to form a condensed ring on the condition that assuming the sum total of &pgr; values of the substituents V1 to V4 is &pgr;v and the sum total of &pgr; values of the substituents W1 to W4 is &pgr;w, either one of &pgr;v and &pgr;w is 0.

Abstract: In a silver halide emulsion, a sum of projected areas of tabular silver halide grains, in which an outer shell region which is 40% in volume from a grain surface contains 5 mol % to 20 mol % of iodide ions with respect to a silver halide in the outer shell region, and which have a projected area diameter of 0.08 &mgr;m to 0.5 &mgr;m and an aspect ratio of 2 to 30, accounts for 80% or more of the total projected area of all grains.

Abstract: A silver halide emulsion containing chemically sensitized silver halide grains, wherein the silver halide grains are prepared by ripening the grains by the addition of (1) fine silver halide grains smaller than the silver halide grains to be digested, (2) a solution containing silver ions, (3) a solution containing halide ions and a solution containing silver ions, or (4) a fine silver halide grain emulsion and a solution containing silver ions, wherein the amount of the addition in terms of silver ion is 0.05 to 8 mol % per mol of silver in the silver halide grains, and the addition is performed after 40% or more of the reaction of chalcogen sensitizer that is added during the chemical sensitization step is completed and before the silver halide grains are optimally ripened.

Abstract: There is disclosed a light-sensitive silver halide photographic emulsion, which comprises light-sensitive silver halide grains mainly composed of (100) planes and (111) planes, at least one compound that is adsorbed selectively on the (100) planes of the silver halide grains, and at least one spectrally sensitizing dye. There is also disclosed a light-sensitive material using the emulsion. The emulsion is high in sensitivity and excellent in graininess.

Abstract: A silver halide photographic emulsion comprise silver chlorobromide or silver iodobromochloride grains, each grain having a silver chloride region in an amount of 0.3 to 50 mol % based on the total silver amount of the grain, and each grain containing at least one ion selected from the group consisting of ions of Ga, In and Group 8, Group 9 and Group 10 metals. A silver halide photographic emulsion that is occupied by tabular grains having an equivalent circular diameter of 0.1 to 0.6 .mu.m in an amount of at least 70% in number, wherein each of the tabular grains has a multilayer structure comprising at least two layers, and at least one of the layers contains chloride in an amount of 0.4 to 20 mol % based on the amount of silver forming the layer, and each of the grains has a silver halide protrusion.

Abstract: A silver halide emulsion is disclosed, which is subjected to chemical ripening using a labile tellurium sensitizer and/or a labile selenium sensitizer in the presence of at least one compound represented by formula (I), (II), (III) or (IV) described in the specification.

Abstract: A silver halide photographic material comprises a silver halide emulsion layer provided on a support. In the photographic material of the present invention, the silver halide emulsion layer contains a tellurium compound represented by the formula (I) or (II): ##STR1## in which each of R.sup.11 and R.sup.12 is --OR.sup.13, --NR.sup.14 R.sup.15, --SR.sup.16 or hydrogen; R.sup.11 and R.sup.12 may be combined with each other to form a heterocyclic ring; each of R.sup.21 and R.sup.22 is an alkyl, alkenyl, alkynyl, aralkyl, aryl or heterocyclic group, --OR.sup.23, --NR.sup.24 R.sup.25, --SR.sup.26 or hydrogen; R.sup.21 and R.sup.22 may be combined with each other to form a heterocyclic ring; each of X.sup.1 and X.sup.2 is oxygen, sulfur or .dbd.NR.sup.17 ; each of X.sup.3 and X.sup.4 is oxygen, sulfur or .dbd.NR.sup.27 ; each of R.sup.13, R.sup.14, R.sup.15, R.sup.16, R.sup.17, R.sup.23, R.sup.24, R.sup.25, R.sup.26 and R.sup.27 is an alkyl, alkenyl, alkynyl, aralkyl, aryl or heterocyclic group or hydrogen; R.sup.

Abstract: A silver halide photographic light-sensitive material of this invention is a silver halide photographic light-sensitive material having at least one silver halide emulsion layer on a support, wherein at least one of the silver halide emulsion layers contain at least one compound represented by formula (I): formula (I) ##STR1## wherein R.sub.1, R.sub.2, and R.sub.3 each represent an aliphatic group, an aromatic group, a heterocyclic group, OR.sub.4, NR.sub.5 (R.sub.6), SR.sub.7, OSiR.sub.8 (R.sub.9)(R.sub.10), TeR.sub.11, X, or a hydrogen atom, R.sub.4, R.sub.7, and R.sub.11 each represent an aliphatic group, an aromatic group, a heterocyclic group, a hydrogen atom, or a cation, R.sub.5 and R.sub.6 each represent an aliphatic group, an aromatic group, a heterocyclic group, or a hydrogen atom, R.sub.8, R.sub.9, and R.sub.10 each represent an aliphatic group, and X represents a halogen atom.