摘要:
A composition containing 1,4-dihydroxy-2-naphthoic acid at a high concentration is obtained by intracellularly and extracellularly producing 1,4-dihydroxy-2-naphthoic acid using a bacterium belonging to the genus Propionibacterium and collecting it. This composition is efficacious in improving intestinal flora, alleviating abdominal ailments in association with the intake of milk, and preventing metabolic bone diseases.
摘要:
There is provided an electric driving unit for X-type gun made up by combining a pressure application driving body with a motor, wherein the electric driving unit is attached to a fixed arm or a gun bracket utilizing a housing of the motor, thereby obtaining the electric driving unit for X-type gun capable of rendering the electric driving unit to be compact and held stably, and causing the maintenance thereof to be executed with reliability and ease. The electric driving unit for X-type gun, wherein the pressure application driving body and a motor are combined with each other, comprises: a rotary shaft provided in the motor and formed of a hollow shaft to which a screw shaft is secured; a guide bearing provided at the front end side of the motor for guiding the pressure application shaft; said pressure application shaft having: a part to be driven by the motor and pulled into the motor; a hollow part for containing therein a tip end side of the screw shaft; a nut to be threaded with the screw shaft; and a bearing provided at the front thereof for causing the rear end of the swing arm to be journalled to the pressure application shaft by a pivotal shaft; said electric driving unit for X-type gun still further comprising: a housing provided at the front end of the motor; a bearing provided in the housing for bearing a load applied to the rotary shaft of the motor in the axial direction thereof; and a bearing provided in the housing for causing the housing to be journalled to the fixed arm or causing the housing to be journalled to the gun bracket by a pivotal shaft.
摘要:
There is provided a friction stir spot joining device to eliminate the generation of tipping torque caused by a pressing force by allowing the axis of a ball screw for generating the pressing force and the center of a shaft of a stirring motor to be coincident with each other, thereby allowing the device to be downsized and the device to effect joining operation with ease. The friction stir spot joining device comprises a ball nut fixed to the rear end side the stirring motor, a hole is defined in an output shaft of the stirring motor in which the ball screw is housed from a rear portion of the hole so as to be positioned in the hole, wherein a rotating force of the pressing motor is transmitted to the ball screw and the stirring motor is moved forward and backward by the ball nut threaded with the ball screw.
摘要:
A motor-driven X-type resistance spot welding gun. A servo-controlled motor torque is converted into force to drive gun arms and into electrode force by using a reduction gear without converting rotational output of the motor into rectilinear motion. The two arms are respectively attached to an output shaft of the reduction gear or a case, and the rotational output of the motor can be converted into swing-wise movement to close and open the arms. The electrode tips on the arms nip a workpiece to apply electrode force to the workpiece, and current is passed through the workpiece to perform spot welding. A motor, a reduction gear and the like are assembled on a common base to form a driving unit so that an arm actuator for the X-type resistance spot welding gun is formed. The same driving unit can be used commonly to various X-type gun models. The independent properties of functions of a bracket for attaching the welding gun to a robot are improved. Since properties of the arm actuator and the bracket are not dependent on a welding unit of the gun (portion through which welding current flows), the production cost for a manufacturer and maintenance cost for a user are reduced.
摘要:
An optical information handling device in which reflectivity of the conventional reproduction-only type optical disk is lowered to 60% or less and is made equal to the reflectivity of write-once type and rewritable type optical disks, whereby interchangeability in these of these disks is possible.
摘要:
A control apparatus for a gas turbine having an air flow control valve for controlling the flow rate of combustion air in an air flow passage from a compressor to the gas turbine, includes an air velocity or flow sensor arranged in the vicinity of the air flow control valve. A control unit operates to control the opening of a fuel flow regulation valve and/or an air flow control valve on the basis of a signal from the air velocity or flow sensor, thereby to control the air fuel ratio in a combustion section of the gas turbine.
摘要:
There are disclosed a novel naphthalocyanine derivative represented by the general formula [I] or [II] shown below, a process for preparing said derivative, an optical information recording medium using said derivative, and a process for preparing thereof: ##STR1## wherein M is a metal, metal oxide, metal hydroxide and the like, R.sup.1 is an alkyl group of 1-22 carbon atoms, n is an integer of 1 to 4, and Y.sub.1 and Y.sub.2 aryloxy group and the like.
摘要:
An optical modulation method and apparatus uses superconductive oxide material for the optical modulation element. The current, magnetic field, temperature or pressure applied to the superconductive oxide material is varied so as to induce a superconduction-normalconduction transition, and the resulting variation in optical characteristics such as the reflectivity, transmissivity or refractive index of the superconductive oxide material modulate the input light. The method and apparatus are fast in operation and simple in structure. The method and apparatus also detect the variation in the current, magnetic field, temperature or pressure as a change in the reflectivity, transmissivity or refractive index of the superconductive oxide material on the basis of a superconduction-normalconduction transition.
摘要:
A liquid separation membrane for pervaporation composed of a polymeric substance having in the main chain a glycosidic skeleton containing cationic groups and/or anionic groups at least some of which form a salt with counter anions and/or counter cations; and a method for pervaporation, which comprises separating a water-organic liquid mixture or an organic liquid-organic liquid mixture by pervaporation using a separation membrane, said membrane being composed of a polymeric substance having in the main chain a glycosidic skeleton containing cationic groups and/or anionic groups at least some of which form a salt with counter anions and/or counter cations and being dried so as to have a water content of not more than 25% by weight.