Abstract: A grease composition for a high-speed rolling bearing contains an alkyl diphenyl ether oil as a base oil, and at least one of diurea compounds represented by the formula (1) ##STR1## wherein R.sup.1 denotes a divalent aromatic hydrocarbon residue having 6 to 15 carbon atoms and R.sup.2 and R.sup.3 may be the same or different and each represent a cyclohexyl group, a cyclohexyl derivative group having 7 to 12 carbon atoms or an alkyl group having 8 to 20 carbon atoms. The diurea compound is contained as a thickener in the base oil. The content in percent of the cyclohexyl group and the cyclohexyl derivative group in the diurea compound is such that a value of [{(numbers of cyclohexyl groups and derivative groups thereof)/(numbers of cyclohexyl groups and derivative groups thereof plus numbers of alkyl groups)}.times.100] is equal to 50 to 100%.

Abstract: A fluoroacrylic polymer having a lubricating effect, which comprises at least one kind selected from units derived from a fluoroalkyl acrylate and units derived from a fluoroalkyl methacrylate as a part or all of structural units and a reducing viscosity .eta.Sp/C not higher than 2 as measured at 25.degree. C. with respect to a solution of 0.1 g of the polymer in 100 ml of chloroform. The fluoroacrylic polymer is incorporated into a thermoplastic resin for rendering an excellent lubricating property thereto.

Abstract: A grease composition for a high speed anti-friction bearing contains, in a synthetic lubricant base oil, (A) 2 to 30 wt. % of a thickening agent consisting of an urea comopund, (B) 0.2 to 30 wt. % of sorbitan monooleate, (C) 0.2 to 3.0 wt.% of barium sulfonate, and (D) 0.2 to 3.0 wt. % of barium lanolate, as indispensable components, each weight percentage being based on the total weight of the composition.

Abstract: A magnetic resonance image synthesizing system comprising a magnetic field generating section for generating a static magnetic field, a gradient magnetic field and a radio-frequency magnetic field and for irradiating those magnetic fields to an object to be examined, a receiver for detecting a magnetic resonance signal supplied from the object to be examined, a processing unit for calculating and constructing an MR image and distribution of blood velocity or relaxation time on the basis of the detected nuclear magnetic resonance signal, a sequence control section for controlling the gradient magnetic field and the radio-frequency magnetic field as well as the receiver, a display unit for displaying an MR image, and a manipulation section for specifying a necessary position on the screen of the display unit, the processing unit further making the display unit display an MR image calculated and synthesized on the basis of scanning parameters and a blood velocity or relaxation time defined in accordance with a p

Abstract: A lithium complex grease for rolling bearings which has high dropping points and is capable of maintaining for a long time an excellent stability of a thickener micell under a high temperature, high adhesion, heat resistance, water resistance, rust resistance, load resistance, low noises and other high-level properties and a method of producing such lithium complex grease. The lithium complex greases are characterized in that base greases containing a base oil, a fatty acid having 12 to 24 carbon atoms, a dicarboxylic acid having 4 to 12 carbon atoms and/or a dicarboxylic acid ester and a lithium hydroxide are thickened with a phosphate ester and/or a phosphite ester. A method of producing the lithium complex greases is characterized in that the base greases having the above composition are added by the phosphate ester and/or the phosphite ester, and thickened under a reaction at a temperature of more than 210.degree. C. (410.degree. F.).