Abstract: Destruction of tooth tissues due to various microorganisms is slowed or prevented by introducing into the mouth arginine or an arginine precursor, especially peptides having from 2-4 amino acid units at least one of which is arginine.

Abstract: Photographic masks, suitable for reproduction in a photoresist layer -- by exposure of the latter to actinic light under the mask, and development of the photo-resist image -- of the pattern of a microelectronic component or device, are made by exposure to light in accordance with an original (especially by contact exposure under a primary mask) containing the pattern to be reproduced, of light-sensitive material having a flat, rigid, dimensionally stable transparent base such as glass and a thin (e.g. 0.

Abstract: Physical and photographic characteristics of silver halide emulsions containing salts of multivalent metals are improved by adding synthetic water-insoluble terpolymers of acrylic esters, glycidyl acrylates and acrylamides as emulsion additives. The crosslinkable terpolymers are highly compatible with silver halide emulsions containing multivalent metal salts when an acrylamide is a polymer component at less than 15 wt% and an anionic sulfate surfactant of the formula ##STR1## where R.sub.5 is a straight or branch-chain alkyl group of C.sub.4 -C.sub.12, R.sub.6 is a straight of branch-chain alkyl group of C.sub.8 -C.sub.20, n is an integer of 8 to 40, and M.sup.+ is an ammonium ion or, a monovalent metal ion such as potassium, sodium or cesium, is the dispersing agent during emulsion polymerization.

Abstract: A novel triazene compound which upon thermal or photochemical decomposition provides free radicals for polymer initiation and methods using same.

Abstract: A photo-induced thermally degradable imaging system comprising a continuous, water-insoluble film of a peroxide copolymer of oxygen and a vinyl aromatic monomer having the structural formula: ##STR1## WHEREIN R.sub.1 can be hydrogen or an alkyl group containing from 1 to 4 carbon atoms, R.sub.2 is hydrogen, an alkyl group containing from 1 to 4 carbon atoms, an aryl group containing from 6 to 12 carbon atoms or a halogen atom and b is an integer from 1 to 2, on a substrate.

Abstract: A positive working, thermally stable photoresist, comprising a light-sensitive orthoquinone diazide or naphthoquinone diazide and a polyamic acid condensation product of an aromatic dianhydride and an aromatic di-primary amine, and a support carrying a layer of said photoresist. After exposure, the image is developed in the layer with an alkaline aqueous developer and is unaffected by heating to 500.degree. C, thus allowing the use of the photoresist layer for plasma and sputter-etching as well as ion implantation.

Abstract: A hardener composition for hardening a hydrophilic photographic binder comprises a carbodiimide hardening agent and from about 5 to about 200 mol per cent, based on the carbodiimide hardening agent, of an N-hydroxy cyclic amine having a hydroxy group on the ring amino nitrogen atom. The layers to be hardened are exemplified by photographic gelatino silver halide layers and/or the gelatino protective layer of a photographic element.

Abstract: A derivative of paraphenylenediamine, for use as a color developer, having a primary amino group available for oxidative coupling, and a carboxy group bound to the benzene ring to provide the compound with the required stability to enable the compound to be incorporated into a photographic film, the compound being non-diffusible during development of the photographic film in an alkaline processing solution.

Abstract: A diffusion transfer photographic element containing a lipophilic, non-diffusing color former in a silver halide emulsion layer, or in a layer adjacent thereto, is developed by using a water- and alkali-soluble color developer capable of coupling with the color former to form a diffusible coupled product, the color developer being coated with the silver halide emulsion layer or in any layer of the photographic element or being in an alkaline developing solution.

Abstract: Compounds of the formula: ##STR1## wherein R is halogen or trifluoromethyl, n is 0 to 5, and CD is the residue of a paraphenylenediamine color developer having a primary amino group available for oxidative coupling, the phenoxycarbonyl group being attached to the primary nitrogen atom of the paraphenylenediamine color developer, are used in a receiving sheet of a diffusion transfer photographic element for coupling with a color former to form a stable dye.

Abstract: An aqueous photographic processing solution useful as a photographic developer bath and as a replenisher therefor, consisting essentially of, per liter:______________________________________ A 1-phenyl-3-pyrazolidone photographic developer 0.8 to 1.8g Hydroquinone or a derivative thereof 15 to 35g Bromide ion 0 to 4g Organic anti-foggant and film speed restrainer 7 to 26 mmol Alkaline material and buffer to provide a pH at 25.degree. C of 10.0 + 0.8 - 0.5.

Abstract: Lipophilic non-diffusing color formers yielding diffusing dyes are employed in color transfer systems to provide improved diffusion and better quality of color. The color formers are two-equivalent couplers having in the coupling position acyloxy, or sulfonyloxy groups which complete a lactone or sultone ring, respectively, and are stable to hydrolysis under alkaline development conditions. Color-providing material is created by a reaction which opens the lactone or sultone intramolecular ring after the non-diffusing color former reacts with the oxidized color developer molecule. Examples are given of intramolecular 2-equivalent couplers which react with the developer to give yellow, magenta and cyan dyes. The 2-equivalent color formers are unique since they have an intramolecular lactone or sultone ring which opens under oxidative coupling conditions to yield the diffusible yellow, magenta and cyan dyes.

Abstract: A photographic silver halide emulsion wherein the emulsion binder comprises the reaction product of 1) a reactant having an amino, mercapto or hydroxy functionality and a cationic active group with 2) a copolymer of maleic anhydride and an ethylenically unsaturated copolymerizable monomer.

Abstract: Hydrophilic coupler solutions are improved by the addition of a diepoxide, pyruvaldehyde, ethyleneglycoldiglycidyl ether or 2,3-butanedione. These solutions exhibit greater stability and a reduced rate of viscosity increase when admixed into gelatin silver halide emulsions.