Abstract: A silver halide photographic emulsion comprising a methine dye compound having in a molecule thereof at least one atomic group in which at least two groups selected from the group consisting of groups represented by formulas (I) and (II) are adjacent to each other or adjacent to each other through an atom:

Abstract: Disclosed is a silver halide photographic material comprising a silver halide emulsion layer containing at least one specific compound, with examples including compounds represented by formula (I), wherein an average aspect ratio of silver halide emulsion grains constituting said silver halide emulsion layer is from 8 to 100: wherein Z1 represents atoms completing a 5- or 6-membered nitrogen-containing heterocyclic ring, L1, L2, L3 and L4 each represent a methine group, V1 represents a monovalent substituent, l1 is an integer of from 0 to 4, p1 is 0 or 1, n1 is 0, 1, 2 or 3, R1 represents a hydrogen atom, an alkyl group, an aryl group or a heterocyclic group, M1 represents a counter ion for adjusting the electric charge balance, m1 is the number of counter ions necessary to render the molecule electrically neutral and ranges from 0 to 10, and La represents a methylene group.

Abstract: A silver halide photographic emulsion which comprises at least one methine compound represented by the following formula (I): 1

Abstract: A silver halide photographic material is disclosed which contains at least one compound represented by the following formula (I) and at least one dye having the absorption maximum in a methanol solution at from 510 to 535 nm: ##STR1## wherein R.sup.1 and R.sup.2 each represents an alkyl group; Y represents an aryl group or a heterocyclic group; V.sup.1, V.sup.2, V.sup.3 and V.sup.4 each represents a hydrogen atom, a halogen atom, an alkyl group, an alkoxyl group, a hydroxyl group, an alkylthio group, a mercapto group, a cyano group, an acyl group, a carboxyl group, or an alkoxycarbonyl group; X.sup.1 represents a counter ion; and m.sup.1 represents a number of 0 or more necessary for neutralizing a charge in the molecule.

Abstract: A silver halide photographic light-sensitive material is disclosed, comprising at least one compound represented by the following formula (I): ##STR1## wherein A represents a divalent linking group containing at least one atom other than a carbon atom, Z.sub.1 represents an atomic group necessary for forming a 5- or 6-membered nitrogen-containing heterocyclic ring, provided that the ring may further be condensed with an aromatic ring, L.sub.1 and L.sub.2 each represents a methine group, p.sub.1 represents 0 or 1, M.sub.1 represents a charge balancing counter ion, m.sub.1 represents a number of from 0 to 10 necessary for neutralizing the charge of the molecule, and Q represents a group necessary for forming a methine dye.

Abstract: A silver halide photographic material is described, which contains at least one compound represented by the following formula (I) and at least one compound represented by the following formula (II): ##STR1## wherein Ar.sub.1 and Ar.sub.2 each represents an aryl group or a heterocyclic group; R.sub.1 and R.sub.2 each represents an alkyl group; M.sub.1 represents a counter ion for charge balance; and m.sub.1 represents a number of 0 or more necessary for balancing a charge in the molecule of the compound; ##STR2## wherein either Z.sub.1 or Z.sub.2 represents an oxygen atom and the other represents a sulfur atom; V represents a monovalent substituent; R.sub.3 and R.sub.4 each represents an alkyl group; M.sub.2 represents a counter ion for charge balance; and m.sub.2 represents a number of 0 or more necessary for balancing a charge in the molecule of the compound.

Abstract: A silver halide photographic light-sensitive material having at least one silver halide emulsion layer formed on a support, wherein silver halide grains in the emulsion layer are reduction-sensitized and contain at least one compound represented by formula (I) below. ##STR1## In formula (I), R is an alkyl group represented as follows. ##STR2## Each of R.sub.a, R.sub.b, R.sub.c, ad R.sub.d represents an alkyl group, an aryl group, a heterocyclic group, an alkoxy group, an aryloxy group, or an amino group, each of Q.sub.a, Q.sub.b, Q.sub.c, and Q.sub.d represents a methylene group, and each of r, s, t, and u represents an integer from 1 to 10.Each of L.sub.1 and L.sub.2 represents a methine group. p1 represents 0 or 1. Z.sub.1 represents atom groups required to neutralize a 5- or 6-membered nitrogen-containing heterocyclic ring. M.sub.1 represents a charge-balancing counterion, and m.sub.1 represents a number from 0 to 10 required to form electric charge of a molecule.

Abstract: A silver halide photographic material which contains at least one methine compound represented by the following formula (I) or (II): wherein Z.sub.1, Z.sub.2 and Z.sub.3 each represents an atomic group necessary to form a 5- or 6-membered nitrogen-containing heterocyclic ring; R.sub.1 and R.sub.3 each represents an alkyl group; R.sub.2 represents a hydrogen atom, an alkyl group, an aryl group or a heterocyclic group; L.sub.1, L.sub.2, L.sub.3, L.sub.4, L.sub.5, L.sub.6, L.sub.7, L.sub.8 and L.sub.9 each represents a methine group; p.sub.1 and p.sub.2 each represents 0 or 1; n.sub.1 and n.sub.2 each represents 0, 1, 2, 3 or 4; M.sub.1 represents a counter ion to balance a charge; and m.sub.1 represents a number of 0 or more necessary for to neutralize a charge in the molecule; provided that at least one of R.sub.1, R.sub.2, R.sub.3, Z.sub.1, Z.sub.2, Z.sub.3, L.sub.1, L.sub.2, L.sub.3, L.sub.4, L.sub.5, L.sub.6, L.sub.7, L.sub.8 and L.sub.9 has a thioether group; ##STR1## wherein Z.sub.4, Z.sub.5 and Z.sub.

Abstract: A silver halide photographic material is disclosed, comprising a support having thereon at least one light-sensitive silver halide emulsion layer, wherein at least 80% of the entire projected area of the silver halide grains contained in said silver halide emulsion layer are occupied by tabular silver halide grains having an aspect ratio of 2 or more and main planes of {111} faces, said silver halide grains comprise at least 80 mol % of silver chloride, and said tabular silver halide grains are spectrally sensitized with the dye represented by formula (S); ##STR1## wherein Z.sub.1 and Z.sub.2 each represents a sulfur atom, a selenium atom, an oxygen atom or a nitrogen atom; and V.sub.1 and V.sub.2 each represents a monovalent substituent, provided that V.sub.1 and V.sub.2 each does not represent an aromatic group and adjacent two or more groups represented by V.sub.1 or V.sub.2 are not bonded to each other to form a condensed ring; I.sub.1 and I.sub.2 each represents 0, 1, 2, 3 or 4; L.sub.1, L.sub.2 and L.

Abstract: A highly sensitive silver halide photographic material is described, which comprises at least one light-sensitive silver halide emulsion layer comprising at least one hemicyanine, hemioxonol, bishemicyanine or bishemioxonol dye having a particular structure and silver halide grains having an aspect ratio of from 3 to 50 or which comprises at least one light-sensitive silver halide emulsion layer comprising at least one bishemicyanine dye having a particular structure and silver halide grains at least 50%, based on projected area, of which are grains having a silver chloride content of at least 50 mole % and an outer surface at least 50% of which is constituted of (111) faces.

Abstract: A silver halide photographic material comprising a support having provided thereon at least one silver halide emulsion layer, wherein silver halide grains of said emulsion layer are reduction sensitized and contain at least one compound represented by the following formula (I): ##STR1## wherein A represents a divalent linking group having at least one atom other than a carbon atom; Z.sub.1 represents an atomic group necessary for forming a 5- or 6-membered nitrogen-containing heterocyclic ring; L.sub.1 and L.sub.2 each represents a methine group; p.sub.1 represents 0 or 1; M.sub.1 represents a counter ion for balancing a charge; m.sub.1 represents a number of from 0 to 10 necessary for neutralizing a charge in the molecule; and Q represents a group necessary to form a methine dye.

Abstract: A sultone compound represented by formula (I) or (I'), a quaternary salt compound represented by formula (II) or (II'), a methine compound represented by formula (III) or (III'), production processes thereof and a silver halide photographic light-sensitive material comprising a quaternary salt compound represented by formula (II) or (II') and/or a methine compound represented by formula (III) or (III') are disclosed.

Abstract: There is disclosed a silver halide photographic light-sensitive material having at least one silver halide emulsion layer on a support, wherein the silver halide grains in at least one of the emulsion layers are subjected to reduction sensitization, and at least one of the emulsion layers contains at least one compound represented by general formula (I): ##STR1## wherein R represents a sulfonylalkenyl group; L.sub.1 and L.sub.2 each represent a methine group; p.sub.1 is 0 or 1; Z.sub.1 represents a group of atoms required to form a 5- or 6-membered nitrogen-containing heterocycle; M.sub.1 represents a counter ion for balance of a charge; m.sub.1 is a number of from 0 to 10 required to neutralize a charge of the molecule; and Q represents a methine or polymethine group substituted with a heterocyclic or aromatic group. The material has high sensitivity, low fog, and excellent storage stability.

Abstract: A silver halide photosensitive material is described, which comprises at least one of the compounds represented by the following formula (I) ##STR1## wherein Z.sub.1 and Z.sub.2 each represents an atomic group necessary for forming a five- or six-membered nitrogen-containing heterocyclic ring, R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each represents an alkyl group, an aryl group or a heterocyclic group, Q represents a divalent linking group or a single bond, with the proviso that at least one of R.sub.1, R.sub.2, R.sub.3, R.sub.4 and Q is substituted with a water-soluble group, L.sub.1, L.sub.2, L.sub.3, L.sub.4, L.sub.5, L.sub.6, L.sub.7 and L.sub.8 each represents a methine group, n.sub.1 and n.sub.2 each is 0, 1, 2, 3 or 4, p.sub.1 and p.sub.2 each is 0 or 1, M.sub.1 represents a charge equilibrium counter ion, and m.sub.1 is a number of from 0 to 10, which is necessary for neutralizing charge of the molecule.

Abstract: A silver halide photographic light-sensitive material is disclosed containing at least one methine compound represented by formula (I) or (III). Further disclosed is the methine compound represented by formula (I).

Abstract: A silver halide photographic light-sensitive material is disclosed. The material comprises a substrate provided thereon with at least one silver halide emulsion layer comprising at least one compound represented by the following Formula (I): ##STR1## wherein Ra and Rb each represents a hydrogen atom, an alkyl group having at least two carbon atoms or an aryl or heterocyclic group, provided that Ra and Rb do not simultaneously represent hydrogen atoms; La and Lb each represents a methylene group; L.sub.1 and L.sub.2 each represents a methine group; p.sub.1 represents 0 or 1; Z.sub.1 represents an atomic group required for forming a 5- or 6-membered nitrogen atom-containing heterocyclic ring; M.sub.1 represents a counterion required for balancing the electrical charge; m.sub.1 represents a numerical value of not less than 0 required for neutralizing the molecule; and Q represents a methine or polymethine group required for forming a methine dye.

Abstract: A silver halide photographic material comprising a support having thereon at least one light-sensitive layer, the photographic material comprising a reduction-sensitized silver halide emulsion containing a compound in which a group adsorptive to silver halide and a specific hydrazine structure are covalently bonded. The silver halide photographic material exhibits high sensitivity and improved fog characteristics and improved preservation stability.

Abstract: A silver halide photographic material having high sensitivity, reduced in fog and excellent in storage stability is described, which comprises a support having thereon at least one constituent layer containing at least one hydrazone compound having a methine dye residue or an adsorbing group to silver halide through a covalent bond or containing at least one metallocene compound having a methine dye residue through a covalent bond.

Abstract: A silver halide photographic material is disclosed, which comprises a support having thereon at least one silver halide emulsion layer, wherein the emulsion layer or other hydrophilic colloid layer contains at least one hydrazine compound and at least one compound represented by the following formula (I): ##STR1## An image forming method is also described, which comprises development processing the above-described image exposed silver halide photographic material with a developing solution comprising (1) from 0.2 to 0.75 mol/liter of dihydroxybenzene based developing agent, (2) from 0.001 to 0.06 mol/liter of 1-phenyl-3-pyrazolidone or p-aminophenol auxiliary developing agent, (3) from 0.3 to 1.2 mol/liter of free sulfite ion, and (4) a compound represented by the following formula (E); and the concentration ratio of the compound represented by formula (E) to the dihydroxybenzene developing agent is from 0.03 to 0.12, and the developing solution has a pH value of from 9.0 to 12.0.

Abstract: A silver halide photographic material having high sensitivity, reduced in fog and excellent in storage stability is described, which comprises a support having thereon at least one constituent layer containing at least one hydrazone compound having a methine dye residue or an adsorbing group to silver halide through a covalent bond or containing at least one metallocene compound having a methine dye residue through a covalent bond.