Abstract: A sensor for gases emitted by combustion, the sensor involving one or more metal oxides forming an adsorption semiconductor the electrical resistance of which changes according to the gas adsorbed, the semiconductor being a semiconductor for the direct adsorption of gases without catalyzed chemical reaction, the sensor being arranged to detect nitrogen oxides in the case of a bright fire, and/or the sensor being arranged to detect, in the case of a smoldering fire, partially unburned gases, in particular alcohols, aldehydes, ketones, carboxylic acids or amines.

Abstract: A sensor for gases emitted by combustion, said sensor comprising one or more metal oxides forming an adsorption semiconductor the electrical resistance of which changes according to the gas adsorbed, said semiconductor being a semiconductor for the direct adsorption of gases without catalyzed chemical reaction, said sensor being arranged to detect nitrogen oxides in the case of a bright fire, and/or said sensor being arranged to detect, in the case of a smoldering fire, partially unburned gases, in particular alcohols, aldehydes, ketones, carboxylic acids or amines.

Abstract: The preparation of a proteinaceous substance suitable for use in a foodstuff is described which comprises fungal fells of the order Mucorales. The cells are grown in a fermentor vessel in a liquid which is mixed during fermentation, after which the RNA content of the fungal cells is reduced to below 4% the fungal cells processed into an edible substance. This substance is then mechanically texturized into edible textured product for inclusion into foodstuffs, for example in the form of chunks as a meat substitute.

Abstract: The invention concerns a method for manufacturing an element formed with semi-conductor(s) for fire detection which consists in applying by evaporation under vacuum on an insulating substrate a phtalocyanine film, which is solidified so as to obtain on the surface of the semiconductor acceptors and donors in such proportion as to enable the detection of a fire with or without flames.

Abstract: Process for manufacturing a semiconductor element, particularly for a flue gas detector, wherein two or more different substances, at least one of which is a semiconductor in insoluble powder form, are dispersed in powder form in a solvent, and the heterogenous suspension of the semiconductor material thus obtained is applied in granular form to an insulating substrate with a specific resistivity value of at least 10.sup.12 .OMEGA. cm.