Abstract: The present invention concerns a method for the controlled precipitation of organic molecules which comprises the use of apparatus that is normally used in the field of photography.

Abstract: Silver halide emulsions for photographic uses contain a nucleation peptiser having at least one region A of up to 100 amino acids. Region A can either consist of (i) at least two silver-binding amino acids and up to 98 amino acids between the two silver-binding amino acids, or can consist of (ii) a stretch of from 9 to 100 amino acids having a polarity corresponding to an average transfer free energy ?F equal to or higher than +1.0 kcal/mol. The nucleation peptizer also has at least one region B (separated from region A) having at least 50 amino acids and having a polarity corresponding to an average transfer free energy equal to or lower than ?1.0 kcal/mol and not containing methionine residues. The emulsion may also contain a growth peptiser having similar characteristics to the nucleation peptiser, but having a longer A region and a greater overall length.

Abstract: The invention is directed to a method for producing a silver halide photographic emulsion comprising the step of reacting a water-soluble silver salt and at least one water-soluble halide salt containing chloride or bromide in aqueous solution in the presence of an organic Grain Growth Modifier (GGM) compound, containing a halide X, which halide is not released in the form of an ion, to form light-sensitive silver halide grains having a silver halide content of a least 50 mole %, said grain growth modifier compound being water-soluble with a solubility>4 mmole per liter, and being selected from the group of compounds with an aliphatic or cyclo-aliphatic backbone R to which is attached one or more halide groups and at least one polar group.