Abstract: A color photographic silver halide material having at least one silver halide emulsion layer, which is stabilized with a compound of formula (I) or (II) ##STR1## where X represents O or NR.sub.2Y represents halogen,Z.sup..crclbar. represents an anion,R.sub.1 represents hydrogen or a substituent, or jointly with X represents the remaining members of a condensed ringR.sub.2 represents hydrogen or a substituent, andQ represents the atoms required for the completion of a 5- or 6-membered ring, is characterized by enhanced stability.

Abstract: A color photographic silver halide material which contains as photosensitive layers on a support at least one red-sensitive silver halide emulsion layer containing at least one cyan coupler, at least one green-sensitive silver halide emulsion layer containing at least one magenta coupler and at least one blue-sensitive silver halide emulsion layer containing at least one yellow coupler, in which, above a photosensitive layer (seen from the support outwards), at least one further layer is provided which contains a colorless compound or combination of colorless compounds, which under processing conditions after exposure gives rise to a uniform, slight color density of a predetermined color and predetermined density over the entire surface, allows correction of the print densities without sensitivity being reduced.

Abstract: The grain/sensitivity ratio of a photographic silver halide material may be improved by adding a compound of the formula I to one of its layers. The material moreover exhibits a low increase in fog on storage. ##STR1## in which: Y.sub.1, Y.sub.2, Y.sub.3 each mean one of the following residues ##STR2## R.sub.1 to R.sub.34 mean H, alkyl or aryl; two residues (R.sub.1 to R.sub.34) located on the same N atom may complete a 5-, 6- or greater-membered ring containing at least one N atom and optionally further heteroatoms; two residues (R.sub.1 to R.sub.34) located on adjacent N atoms may complete a ring involving both N atoms and at least one P atom;X.sup.- means an anion required to balance the charge, for example Cl.sup.-, Br.sup.- or tosylate (TosO.sup.-).

Abstract: A colour photographic silver halide material with a support, at least one red-sensitive silver halide emulsion layer containing at least one cyan coupler, at least one green-sensitive silver halide emulsion layer containing at least one magenta coupler, at least one blue-sensitive silver halide emulsion layer containing at least one yellow coupler, at least one interlayer Z-1 beneath the lowermost red-sensitive silver halide emulsion layer and/or at least one interlayer Z-2 beneath the lowermost green-sensitive silver halide emulsion layer, in which Z-1 and/or Z-2 contains a silver halide emulsion which contains tabular grains with an aspect ratio of>2, an average diameter of a sphere of equal volume of.gtoreq.0.3 .mu.m and a diameter of a circle of equal projected surface area of the tabular grains of at least 0.3 .mu.m, is distinguished by improved red and/or green sensitivity.

Abstract: Color photographic silver halide material of the negative type, in which at least one silver halide emulsion layer contains a compound of the formulaA-B-(T.sub.1).sub.m -(COUP-D)-(T.sub.2).sub.n (I),whereinA represents a ballast group,B represents the radical of a compound which reacts to release (T.sub.1).sub.m -(COUP-D)-(T.sub.2).sub.n during development,T.sub.1 and T.sub.2 represent time-regulating units which can be released during development,m, n are 0 or 1,COUP represents the radical from a 4-equivalent coupler andD represents a group with an affinity for silver,distinguished by improved sensitivity.

Abstract: A color photographic silver halide material in which at least one silver halide emulsion consists of 85 to 99 mol-% AgCl, 1 to 10 mol-% AgI and 0 to 5 mol-% AgBr has high sensitivity (camera sensitivity) and can be developed in at most 120 s.

Abstract: A colour photographic silver halide material having at least one silver halide emulsion layer which contains at least one colour coupler and in which the silver halide grains contain from 40 to 90 mol. % of AgCl and at least two zones differing in halide composition, the chloride content of the outer zone being at least 10 mol. % higher than that of the inner zone, which silver halide emulsion layer is associated with a DIR compound whose reaction with the oxidized colour developer has a rate constant k>2000 [1/mol.s] is distinguished by excellent sharpness and colour reproduction even when processed by a high speed process.

Abstract: A by-pass gas turbine engine capable of producing an unmixed exhaust stream which comprises a core of hot turbine exhaust gases surrounded by an annular layer of by-pass air, is combined with a target thrust reverser. The ratio of the total pressure of the by-pass air to the total pressure of the turbine exhaust gases is arranged to be greater than unity to a significant extent, and the buckets are made from lightweight materials such as titanium, light alloys or even fiber re-inforced composite materials.