Abstract: A method of operating a low boiling point liquid fuel injection system for an internal combustion engine (1) wherein the fuel is stored in a tank (17) and has a variable vapour pressure in the tank (17) dependent upon ambient temperature. The method comprises pumping the fuel to the fuel inlet rail (15) and injectors (8, 9, 10, 11) at an absolute pressure which is maintained at a constant differential above the variable vapour pressure in the tank (17), monitoring the absolute pressure of the fuel and varying the fuel injection pulse width dependent upon the absolute pressure of the fuel together with the other usual engine parameters. The method has particular application where the fuel is a liquified gas.

Abstract: Radiation-sensitive compositions are disclosed of a type suitable for preparing ion sensitive membranes for electrochemical ion sensors. The compositions are comprised of a radiation-sensitive polymer containing radiation-sensitive recurring units having an ionophore group and recurring units having a crosslinking group. In preparing a membrane the radiation-sensitive composition is coated onto a sensor, exposed to activating radiation to produce crosslinking in areas where the membrane structure is desired, and removed in any remaining non-exposed areas.

Abstract: The invention relates to a process for preparing indium alkoxides soluble in organic solvents.The preparation method consists in reacting an indium halide with a C.sub.3 -C.sub.20 alcohol in the presence of a base having a pka >10 and a low nucleophilicity, in anhydrous medium, under inert gas and in the presence of polar organic solvents.The invention allows to obtain with a high yield pure indium alkoxides.

Abstract: A photographic coupler containing an aryloxysilyl group (--X--O--Y) wherein X is substituted or unsubstituted arylene and Y is a silyl group) is useful in photographic silver halide elements and processes. Such a photographic coupler enables improved dispersibility and improved photographic properties.

Abstract: An ion-sensitive composition and an ion-selective electrode is disclosed in which the ionophore is an organotin having the formulaR.sub.x.sup.1 Sn(SR.sup.2).sub.4-xorR.sub.y.sup.1 Sn(SR.sup.3 --X--R.sup.3 S).sub.4-y SnR.sup.1whereinx is 0 or an integer from 1 to 3;y is 2 or 3;each R.sup.1 independently is substituted or unsubstituted alkyl or substituted or unsubstituted aryl;each R.sup.2 independently is substituted or unsubstituted alkyl.each R.sup.3 independently is substituted or unsubstituted alkylene; and,X is a single chemical bond or a linking group.

Abstract: A photographic element comprising a support having thereon at least one silver halide emulsion layer having associated therewith a dye-forming coupler and an organosilane, nonhydrolyzable in an alkaline medium, wherein:(a) one or two aryloxy groups are attached to the silicon atom of the silane either directly or indirectly through an alkylene group or an alkyleneoxy group, and(b) each aryloxy group is attached directly or indirectly through a single linking group to an aryl group substituted with a hydroxy, hydroxyalkoxy, organosilyloxy, organosilylalkoxy or organosilyloxyalkoxy group.Use of the compounds provides an improvement in density and contrast.