Abstract: A spectrally sensitized silver halide photographic emulsion containing, in combination, supersensitizing amounts of at least one sensitizing dye represented by the following general formula (I): ##STR1## wherein Z.sup.1 and Z.sup.2 each represents an atomic group necessary for completing a benzimidazole nucleus, an oxazole nucleus, a benzoxazole nucleus, a naphthoxazole nucleus, a thiazole nucleus, a benzothiazole nucleus, a naphthothiazole nucleus, a selenazole nucleus, a benzoselenazole nucleus or a naphthoselenazole nucleus excepting that both of Z.sup.1 and Z.sup.2 do not simultaneously represent an atomic group necessary for completing an oxazole nucleus, a benzoxazole nucleus or a naphthoxazole nucleus; R.sup.1 and R.sup.2 each represents an aliphatic group which may be substituted and the carbon chain of which may be interrupted with an oxygen atom or a sulfur atom; R.sup.0 represents a hydrogen atom, an alkyl group or an aralkyl group; X.sub.(1).sup.

Abstract: A silver halide photographic emulsion containing, in combination, supersensitizing amounts of at least one sensitizing dye of the following general formula (I) ##STR1## wherein Z.sub.1 and Z.sub.2 each represents an atomic group required for forming a benzimidazole ring; R.sub.1 and R.sub.2 each represents an aliphatic group and at least one of R.sub.1 and R.sub.2 represents an alkyl group having a carboxy group, a hydroxyalkyl group or an alkyl group having a sulfo group; X.sub.1 represents an acid anion; and m is 1 or 2, m being 1 when the dye forms an inner salt (a betaine-like structure) and at least one sensitizing dye of the following general formula (II) ##STR2## wherein Z.sub.3 represents an atomic group required for forming a benzoxazole ring or a .beta.-naphthoxazole ring; Z.sub.4 represents an atomic group required for forming a benzothiazole ring, a benzoselenazole ring, a .beta.-naphthothiazole ring or a .beta.-naphthoselenazole ring; R.sub.3 and R.sub.

Abstract: A silver halide photographic emulsion containing, in supersensitizing amounts, at least one sensitizing dye represented by the following general formula (I) ##EQU1## wherein Z.sub.11 represents the atoms necessary to complete a pyridine nucleus or a quinoline nucleus; Z.sub.12 represents the atoms necessary to complete an oxazole nucleus, a benzoxazole nucleus, a naphthoxazole nucleus, an imidazole nucleus, a benzimidazole nucleus or a naphthoimidazole nucleus; and R.sub.11 and R.sub.12 each represents an aliphatic group with at least one of R.sub.11 and R.sub.12 having a carboxy or sulfo group; and at least one sensitizing dye represented by the following general formula (II) ##EQU2## wherein Z.sub.21 and Z.sub.22, which can be the same or different, each represents the atoms necessary to complete a thiazole nucleus, a benzothiazole nucleus, a selenazole nucleus or a benzoselenazole nucleus; and R.sub.21 and R.sub.22 each represents an aliphatic group with at least one of R.sub.21 and R.sub.

Abstract: A silver halide photographic emulsion containing, in supersensitizing amounts, at least one sensitizing dye represented by the following general formula (I) ##EQU1## wherein Z.sub.11 represents the atoms necessary to complete a thiazole nucleus, a selenazole nucleus, a benzothiazole nucleus, a benzoselenazole nucleus, a naphthothiazole nucleus or a naphthoselenazole nucleus; Z.sub.12 represents the atoms necessary to complete a naphthothiazole nucleus, or a naphthoselenazole nucleus; and R.sub.11 and R.sub.12 each represents an aliphatic group with at least one of R.sub.11 and R.sub.12 having a carboxy or sulfo group; and at least one sensitizing dye represented by the following general formula (II) ##EQU2## wherein Z.sub.21 represents the atoms necessary to complete a thiazole nucleus, a benzothiazole nucleus, a naphthothiazole nucleus, a selenazole nucleus, a benzoselenazole nucleus or a naphthoselenazole nucleus; Z.sub.

Abstract: A silver halide photographic emulsion containing, in supersensitizing amounts, at least one sensitizing dye represented by the following General Formula (I): ##EQU1## in which Z.sub.11 represents an atomic group necessary for completing a pyridine or quinoline nucleus; Z.sub.12 represents an atomic group necessary for completing an oxazole, benzoxazole, naphthoxazole, imidazole, benzimidazole or naphthimidazole nucleus; and R.sub.11 and R.sub.12 each represents an aliphatic group and at least one of R.sub.11 and R.sub.12 is an aliphatic group containing a carboxy group or a sulfo group; and at least one sensitizing dye represented by the following General Formula (II): ##EQU2## in which Z.sub.21 represents an atomic group necessary for completing a thiazole, benzothiazole, naphthothiazole, selenazole, benzoselenazole or naphthoselenazole nucleus; Z.sub.22 represents an atomic group necessary for completing an imidazole, benzimidazole or naphthimidazole nucleus; an R.sub.21 and R.sub.

Abstract: A silver halide photographic emulsion for use in flash exposure, which contains a sensitizing amount of a defined simple merocyanine dye.

Abstract: A silver halide photographic emulsion containing, in combination, supersensitizing amounts of at least one sensitizing dye of the following general formula (I) ##EQU1## WHEREIN Z.sub.1 and Z.sub.2 each represents an atomic group required to form a quinoline ring; R.sub.1 and R.sub.2 each represents an aliphatic group, with at least one of R.sub.1 and R.sub.2 being a hydroxyalkyl group, an alkyl group containing a carboxyl group or an alkyl group containing a sulfo group; X.sub.1 is an acid anion; and m is 1 or 2, and when m is 1 the dye forms an intramolecular salt and at least one sensitizing dye of the following general formula (II) ##EQU2## WHEREIN Z.sub.3 represents an atomic group required to form a benzimidazole ring, a benzoxazole ring or a .beta.-naphthoxazole ring; Z.sub.4 represents an atomic group required to form a benzothiazole ring, a benzoselenazole ring, a .beta.-naphthothiazole ring or a .beta.-naphthoselenazole ring; R.sub.3 and R.sub.

Abstract: A silver halide photographic emulsion containing at least one sensitizing dye represented by the formula (I) ##EQU1## wherein Z.sub.1 represents a group of atoms necessary to complete a thiazole nucleus, a benzothiazole nucleus, a benzoselenazole nucleus, a naphthothiazole nucleus or a naphthoselenazole nucleus; Z.sub.2 represents a group of atoms necessary to complete a naphthothiazole nucleus or a naphthoselenazole nucleus; and R.sub.1 and R.sub.2, which may be the same or different, each represents an aliphatic group and at least one of R.sub.1 and R.sub.2 is an aliphatic group containing a carboxyl group or a sulfo group; and at least one sensitizing dye represented by the formula (II) ##EQU2## wherein Z.sub.3 and Z.sub.4 which may be the same or different, each represents a group of atoms necessary to complete a thiazole nucleus, a benzothiazole nucleus or a benzoselenazole nucleus; and R.sub.3 and R.sub.4, which may be the same or different, each represents an aliphatic group and at least one of R.sub.

Abstract: A silver halide photographic emulsion containing, in combination, supersensitizing amounts of at least two carbocyanine dyes having structures hereinafter defined.

Abstract: A silver halide photographic emulsion containing, in combination, supersensitizing amounts of at last two carbocyanine sensitizing dyes as hereinafter defined.

Abstract: A method for spectrally sensitizing a photographic light-sensitive emulsion, which comprises dissolving a photographic spectrally sensitizing dye having an amidinium ion auxochrome in an organic solvent containing a substantially water-free acid having a pKa not exceeding about 5, and adding this dye-containing acid-organic solvent solution to a light-sensitive emulsion.

Abstract: A spectral-sensitized silver halide photographic emulsion containing in supersensitizing amounts the combination of1. at least one sensitizing dye represented by the formula ##EQU1## WHEREIN Z.sub.1 and Z.sub.2 are the atomic groups necessary for forming a benzoxazole ring or a napthoxazole ring, in which a benzene nucleus of the ring may be substituted; R.sub.1 and R.sub.2 are aliphatic groups and at least one of R.sub.1 or R.sub.2 is a carboxyalkyl group or a sulfoalkyl group; R.sub.3 is a hydrogen atom or an alkyl group; X is an acid anion group; and m is 1 or 2 and m is 1 when the dye forms an intramolecular salt having a betaine like-structure,2. at least one sensitizing dye represented by the formula (II) ##EQU2## wherein Z.sub.3 is an atomic group necessary for forming a 5-membered or 6-membered heterocyclic ring which may be substituted by substituents other than R.sub.4 ; Z.sub.4 is an atomic group necessary for forming a 2-pyrazoline-5-one ring nucleus which may be substituted; R.sub.

Abstract: A silver halide photographic emulsion containing in a supersensitizing amount the combination of at least one sensitizing dye represented by the general formula (I) ##SPC1##wherein, A.sub.1, A.sub.2, A.sub.3 and A.sub.4 each represents a member selected from the group consisting of a hydrogen atom, a lower alkyl group, an alkoxy group, a halogen atom, a hydroxyl group, an aryl group, a carboxyl group, an alkoxycarbonyl group, a cyano group, a trifluoromethyl group, an amino group, an acylamide group, an acyloxyl group, an alkoxycarbonylamino group, and a carbalkoxy group; and A.sub.1 and A.sub.2 and A.sub.3 and A.sub.4 can combine to form a naphthoxazole nucleus; R.sub.o represents a hydrogen atom, a lower alkyl group or an aryl group; R.sub.1 and R.sub.2 each represents an alkyl group, provided that at least one of R.sub.1 or R.sub.2 represents a sulfoalkyl group; X.sub.

Abstract: A silver halide photographic emulsion containing a supersensitizing amount of the combination of at least one dye represented by the general formula (I) ##SPC1##wherein Z represents the non-metal atoms necessary to form a benzene nucleus; R.sub.0, R.sub.1 and R.sub.2 each represents aliphatic groups, with at least one of R.sub.1 and R.sub.2 representing an alkyl group containing a carboxy group or an alkyl group containing a sulfo group; Y represents a halogen atom; X represents an acid anion; n represents an integer of 1 to 2, with n being 1 when the dye forms an intramolecular salt; and at least one dye represented by the general formula (II) ##EQU1## wherein Z.sub.1 represents the non-metal atoms necessary to form a 5-or 6-membered heterocyclic nucleus; Q represents the atoms necessary to form a rhodanine nucleus, a 2-thio-2,4-imidazolidinedione nucleus, a 2-pyrazoline-5-one nucleus, or a 2-thio-2,4-oxazolidinedione nucleus; R.sub.3 represents an aliphatic group; R.sub.

Abstract: A silver halide photographic emulsion which contains in combination a supersensitizing amount of at least one pseudocyanine sensitizing dye and at least one oxacarbocyanine sensitizing dye.