Abstract: Provided is an ink for use in electronic component production making use of screen printing, which is suitable for actually allowing fine lines with high precision to be drawn in screen printing, and for actually allowing successive screen printing operations to be performed. The ink for screen printing of the present invention includes surface-modified silver nanoparticles (A) and a solvent (B), and has a viscosity at a shear rate of 10 (1/s) and 25° C. of 60 Pa·s or more. The surface-modified silver nanoparticles (A) each include a silver nanoparticle and an amine-containing protective agent coating the silver nanoparticle. The solvent (B) includes at least a terpene solvent. In solvent (B), a content of solvents having a boiling point of less than 130° C. is 20 wt % or less based on the total amount of solvents.

Abstract: Provided is an ink for use in electronic component production making use of screen printing, which is suitable for actually allowing fine lines with high precision to be drawn in screen printing, and for actually allowing successive screen printing operations to be performed. The ink for screen printing of the present invention includes surface-modified silver nanoparticles (A) and a solvent (B), and has a viscosity at a shear rate of 10 (1/s) and 25° C. of 60 Pa·s or more. The surface-modified silver nanoparticles (A) each include a silver nanoparticle and an amine-containing protective agent coating the silver nanoparticle. The solvent (B) includes at least a terpene solvent. In solvent (B), a content of solvents having a boiling point of less than 130° C. is 20 wt % or less based on the total amount of solvents.

Abstract: Provided is an ink for use in electronic component production making use of screen printing, which is suitable for actually allowing fine lines with high precision to be drawn in screen printing, and for actually allowing successive screen printing operations to be performed. The ink for screen printing of the present invention includes surface-modified silver nanoparticles (A) and a solvent (B), and has a viscosity at a shear rate of 10 (1/s) and 25° C. of 60 Pa·s or more. The surface-modified silver nanoparticles (A) each include a silver nanoparticle and an amine-containing protective agent coating the silver nanoparticle. The solvent (B) includes at least a terpene solvent. In solvent (B), a content of solvents having a boiling point of less than 130° C. is 20 wt % or less based on the total amount of solvents.

Abstract: In a freezing agent consumption measurement system for measuring the consumption of the freezing agent in a low-temperature container, due to evaporation of the freezing agent, including a gas flow meter provided in the gas flow path to measure the flow of the evaporated gas from the freezing agent, a tank is provided in the gas flow path means, and the pressure in the tank is maintained at a predetermined value. The measurement of the flow of the gas is not affected by the variation in the atmospheric pressure, and accordingly accurate measurement of the consumption of the freezing agent is accomplished.

Abstract: A process for purifying tryptophan is disclosed. In the process of the present invention, tryptophan is recrystallized in water-containing acetic acid. By the process of the present invention, tryptophan with high purity may be obtained with high yield without condensation or neutralization.

Abstract: An electromagnet has a magnetic shield whose end plate is formed with an asymmetrical side hole 10 in addition to a center opening 6. The thickness of portion 11 of the end plate which covers an area defined by a deviation angle of not more than 180.degree. with a center line passing through a center of the side hole is made larger than the remaining portion of the end plate.

Abstract: A gas insulated electromagnetic induction appliance in which a non-condensing insulating gas and a condensing insulating coolant are confined, comprises (a) a pressure detector for detecting a pressure within the container vessel; (b) a gas reservoir connected to the container vessel through a gas discharging passageway including a pipe line, a first gas valve, a compressor, and a gas diffuser; a gas feeding passageway including a pipe line and a second gas valve; and a liquid feeding passageway including a pipe line and a liquid valve; (c) a definite quantity of insulating coolant confined in the gas reservoir; (d) a liquid surface detector for detecting a quantity of the insulating coolant in the gas reservoir; and (e) control means which controls the gas valve, the liquid valve, and the compressor to thereby regulate a pressure in the container vessel and a quantity of the liquid in the gas reservoir.

Abstract: A handy type printer with dry cells incorporated therein in which an arrangement consisting of dry cells and a paper feed motor aligned, a screw shaft for sliding a head therealong and a head-driving motor are disposed in the order named in parallel with each other; the ends of a platen and the head-driving screw shaft are supported by first and second shaft bearing members, respectively; and a plurality of reduction gears are rotatably mounted on the first shaft bearing member so as to transmit the torques of the paper feed motor and the head-driving motor to the platen and the head-driving screw shaft, respectively.

Abstract: The invention is relative with a gas-insulated electrical apparatus comprising a tank housing an electrical apparatus proper and in which a gas mixture consisting of a noncondensable insulating gas and a condensable refrigerant gas and a liquid phase of the condensable refrigerant gas are sealed, and a gas reservoir connected to said tank in the gas mixture feeding or receiving relation therewith. According to the invention, means are provided between the tank and the gas reservoir for selectively supplying said gas mixture from said tank into said gas reservoir or vice versa.