Abstract: A fructose transferring enzyme is immobilized by adsorption on a granular carrier having a primary to quaternary amine. The carrier is preferably an epoxy polymer, a vinyl polymer or a chitosan derivative having a primary, secondary or tertiary amine. Immobilization can be performed without or with a crosslinking agent. The immobilized enzyme is used for producing fructooligosaccharides by passing a sucrose solution through a column containing the immobilized enzyme.

Abstract: A method for preventing deterioration of a food is disclosed wherein an oosaccharide originating from agar or carrageenan or both agar and carrageenan are added to the food. The method is effective to prevent deterioration of foods attributed to retrogradation of gelatinized starch.

Abstract: A novel organosilicon compound is disclosed which is an isocyanato group-containing organosilane compound having one or two isopropenyloxy groups as represented by the general formula (CH.sub.2 .dbd.CCH.sub.3 --O).sub.n (CH.sub.3).sub.3-n Si(CH.sub.2).sub.3 NCO, in which n is 1 or 2. The compound can be prepared by heating a mixture of a chlorosilane of the formula (Cl).sub.n (CH.sub.3).sub.3-n Si(CH.sub.2).sub.3 NCO and acetone in the presence of a tertiary amine compound, e.g., triethyl amine, acting as an acceptor of hydrogen chloride and as a catalyst to effect the enolation reaction.

Abstract: A silicon-containing isocyanate compound represented by the following general formula [I]: ##STR1## wherein each of R.sup.1, R.sup.2, and R.sup.3 independently represents a hydrocarbon group having 1 to 10 carbon atoms, an alkoxy group having 1 to 6 carbon atoms or a trialkyl siloxy group (each alkyl having 1 to 4 carbon atoms), with the proviso that at least one of R.sup.1, R.sup.2, and R.sup.3 is an alkoxy group having 1 to 6 carbon atoms, and n is a number of from 1 to 4, can be obtained in a high yield by reacting carbonyl chloride with a silicon-containing alkylamine represented by the following general formula [II]: ##STR2## wherein R.sup.1, R.sup.2, R.sup.3, and n are as defined above, in an inert organic solvent in the presence of a tertiary amine.

Abstract: This invention relates to a method for stabilizing unsaturated cycloacetal resin produced by reacting (I) cycloacetal compound prepared by the condensation of polyhydric alcohol more than tri-hydric and unsaturated aldehyde, with (II) unsaturated alcohol having a radical-polymerizable unsaturated bond and an alcoholic hydroxyl group in the same molecule, and optionally further with one or more compounds selected from the group consisting of polyhydric alcohol, hydroxy polyether and hydroxy polyester, in the presence of acid catalyst, characterized by adding one or more compounds selected from the group consisting of ammonia, primary amine, secondary amine, tertiary amine, quaternary ammonium salt, hydrazine and its derivatives in an amount of 0.