| 摘要 |
A water-soluble methine compound represented by the following general formula (I): (I) (R-COOe)m wherein Z1 and Z2, which may be the same or different, each represents a non-metallic atomic group required for forming a 5-membered or 6-membered nitrogen-containing heterocyclic ring; R1 and R2, which may be the same or different, each represents an alkyl group; Q1 and Q2 each represents an atomic group required, in combination, for forming a 4-thiazolidinone ring, a 5-thiazol-idinone ring, a 4-imidazolidinone ring, a 4-oxazolidin-one ring, a 5-oxazolidinone ring, a 5-imidazolidinone ring or a 4-dithiolanone ring; L1, L2, L3, L4 and L5, which may be the same or different, each represents a methine group; R represents a hydrogen atom, an alkyl group, an aryl group or a heterocyclic group; m represents 1 or 2; i and h each represents 0 or 1; ? represents 1 or 2; and j and k each represents 0, 1, 2 or 3. A photographic silver halide emulsion containing said methine compound added in the form of an aqueous solution is also disclosed.
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