Abstract: An electromagnetic contactor includes a fixed core into which a bobbin of an electromagnetic coil is inserted and fitted, a movable core, a movable insulating base, a retracting spring, a fixed insulating base, and a supporting mechanism. The supporting mechanism is inserted into a through-hole formed in a thickness direction of the fixed core, and is configured in such a manner that a buffer spring is arranged between both ends of a supporting member that is arranged so as to protrude from the through-hole and a lower surface of the coil bobbin. An elastic member is provided between the fixed insulating base and a lower surface of the fixed core.

Abstract: The present invention is to provide an electromagnetic contactor in which the collision velocity of both of a movable core and a fixed core is effectively reduced to improve mechanical endurance of an electromagnet. The combined load of a buffer spring before actuation is set smaller than that of a retracting spring and a contact spring in a conduction state, so that the fixed core is actively moved towards the movable core side when being actuated by an electromagnetic coil, and a relative collision velocity can be accordingly decreased, thus improving mechanical endurance of the movable core and the fixed core.

Abstract: A process for modifying fats and oils which comprises applying partial glyceride lipase to fats and oils containing partial glycerides and fatty acids to synthesize triglycerides from the partial glycerides by esterification.The lipase is preferably an immobilized lipase and this process is preferably carried out under a water concentration of 1500 ppm or less.By using partial glyceride lipase according to the present invention, there can be obtained modified fats and oils having a low content of diglycerides without changing triglyceride composition.

Abstract: Lipase is absorbed on a carrier to provide an immobilized lipase preparation containing 0.5 to 8% water by a process that does not require drying. The process is carried out by providing a solution or dispersion of lipase in a liquid solvent, mixing the solution or dispersion of lipase with a carrier to provide a mixture containing 0.5 to 8% water and kneading the mixture to produce the immobilized lipase preparation. The solution or dispersion of lipase may contain an enzyme activity enhancing agent such as a fatty acid or its derivative such as lecithin. By not drying, an immobilized lipase preparation having higher activity is obtained.

Abstract: The present invention relates to a method for reforming fats and oils which comprises treating the fats and oils containing partial glycerides with two or more kinds of lipases which are different in a fatty acid specificity and/or a position specificity in the presence of a small amount of water to obtain fats and oils containing partial glycerides in a low content in a high yield. According to the invention, a reaction rate and a yield are improved.