Abstract: A method of producing a high performance stainless steel exhibiting corrosion resistance even under a very severe corrosion environment at temperatures of equal to or higher than 180° C., for example, 220° C., while maintaining strength and toughness by improving the corrosion resistance of a conventional martensitic stainless steel with high strength. The martensitic stainless steel includes, in mass %, C: 0.005% to 0.05%, Si: equal to or less than 1.0%, Mn: equal to or less than 2.0%, Cr: 16 to 18%, Ni: 2.5 to 6.5%, Mo: 1.5 to 3.5%, W: equal to or less than 3.5%, Cu: equal to or less than 3.5%, V: 0.01 to 0.08%, Sol.Al: 0.005 to 0.10%, N: equal to or less than 0.05%, and Ta: 0.01 to 0.06%, and the balance Fe with inevitable impurities.

Abstract: A purpose of the present invention is to provide a martensitic stainless steel tube exhibiting excellent performance even in severe corrosive environments in which a partial pressure of hydrogen sulfide exceeds 0.03 bar. Provided is a low C-high Cr alloy steel tube for OCTG (Oil Country Tubular Goods) having minimum yield strength of 862 MPa and excellent corrosion resistance, wherein the steel tube contains, in percent by mass, 0.005 to 0.05% C, 12 to 16% Cr, 1.0% or less Si, 2.0% or less Mn, 3.5 to 7.5% Ni, 1.5 to 3.5% Mo, 0.01 to 0.05% V, 0.02% or less N, and 0.01 to 0.06% Ta and satisfies the relationship in the following formula (1), and the rest comprises Fe and unavoidable impurities. 25-25 (% Ni)+5 (% Cr)+25 (% Mo)?0??(1).

Abstract: To provide a delay circuit improved in the accuracy of a delay time. A delay circuit is provided which includes a plurality of switches respectively provided between a plurality of constant current sources and a delay time adjustment terminal, a control circuit which ON/OFF-controls the switches, and a comparator circuit which compares a voltage of the delay time adjustment terminal and a reference voltage. The control circuit sequentially turns ON the switches every preset period after a signal is inputted to a signal input terminal and sets as a delay time, a time taken for the comparator circuit to detect that the voltage of the delay time adjustment terminal exceeds the reference voltage.

Abstract: There is provided a voltage regulator that stably operates without using a large phase compensation capacitance. The voltage regulator has a voltage 3-stage amplifier circuit comprised of a differential amplifier circuit, a first source ground amplifier circuit provided with a phase compensation circuit, and a second source ground amplifier circuit, which serves as an output circuit. The voltage 3-stage amplifier circuit is provided, between the first source ground amplifier circuit and the second source ground amplifier circuit, with a phase compensation circuit that is effective for reducing the gains of the differential amplifier circuit and the first source ground amplifier circuit.

Abstract: To provide a delay circuit improved in the accuracy of a delay time. A delay circuit is provided which includes a plurality of switches respectively provided between a plurality of constant current sources and a delay time adjustment terminal, a control circuit which ON/OFF-controls the switches, and a comparator circuit which compares a voltage of the delay time adjustment terminal and a reference voltage. The control circuit sequentially turns ON the switches every preset period after a signal is inputted to a signal input terminal and sets as a delay time, a time taken for the comparator circuit to detect that the voltage of the delay time adjustment terminal exceeds the reference voltage.

Abstract: The present invention provides a high performance-stainless steel exhibiting a corrosion resistance even under very severe corrosion environments at temperatures of equal to or higher than 180° C., for example, 220° C. while maintaining strength and a toughness by improving a corrosion resistance of a conventional martensitic stainless steel with high strength. The present invention provides a martensitic stainless steel containing, in mass %, C: 0.005% to 0.05%, Si: equal to or less than 1.0%, Mn: equal to or less than 2.0%, Cr: 16 to 18%, Ni: 2.5 to 6.5%, Mo: 1.5 to 3.5%, W: equal to or less than 3.5%, Cu: equal to or less than 3.5%, V: 0.01 to 0.08%, Sol.Al: 0.005 to 0.10%, N: equal to or less than 0.05%, and Ta: 0.01 to 0.06%, and the balance Fe with inevitable impurities.

Abstract: There is provided a voltage regulator that stably operates without using a large phase compensation capacitance. The voltage regulator has a voltage 3-stage amplifier circuit comprised of a differential amplifier circuit, a first source ground amplifier circuit provided with a phase compensation circuit, and a second source ground amplifier circuit, which serves as an output circuit. The voltage 3-stage amplifier circuit is provided, between the first source ground amplifier circuit and the second source ground amplifier circuit, with a phase compensation circuit that is effective for reducing the gains of the differential amplifier circuit and the first source ground amplifier circuit.

Abstract: A purpose of the present invention is to provide a martensitic stainless steel tube exhibiting excellent performance even in severe corrosive environments in which a partial pressure of hydrogen sulfide exceeds 0.03 bar. Provided is a low C-high Cr alloy steel tube for OCTG (Oil Country Tubular Goods) having minimum yield strength of 862 MPa and excellent corrosion resistance, wherein the steel tube contains, in percent by mass, 0.005 to 0.05% C, 12 to 16% Cr, 1.0% or less Si, 2.0% or less Mn, 3.5 to 7.5% Ni, 1.5 to 3.5% Mo, 0.01 to 0.05% V, 0.02% or less N, and 0.01 to 0.06% Ta and satisfies the relationship in the following formula (1), and the rest comprises Fe and unavoidable impurities.

Abstract: Lectin is extracted from seeds of bitter gourd (also known as balsam pear or Momordica charantia). A blood type checking reagent for checking a blood type includes the lectin. The lectin extracted from seeds of bitter gourd preferably has a molecular weight between 100,000 and 170,000 measured with polyacrylamide gel electrophoresis in existence of sodium dodecyl sulfate (SDS-PAGE). A method of checking a blood type includes the steps of: extracting lectin from seeds of bitter gourd (also known as balsam pear or Momordica charantia); preparing a blood type checking reagent containing the lectin; and checking a blood type using the blood type checking reagent.

Abstract: Lectin is extracted from seeds of bitter gourd (also known as balsam pear or Momordica charantia). A blood type checking reagent for checking a blood type includes the lectin. The lectin extracted from seeds of bitter gourd preferably has a molecular weight between 100,000 and 170,000 measured with polyacrylamide gel electrophoresis in existence of sodium dodecyl sulfate (SDS-PAGE). A method of checking a blood type includes the steps of: extracting lectin from seeds of bitter gourd (also known as balsam pear or Momordica charantia); preparing a blood type checking reagent containing the lectin; and checking a blood type using the blood type checking reagent.

Abstract: Lectin for checking a blood type is extracted from seeds of bitter gourd, balsam pear, or Momordica charantia. A blood type checking reagent includes the lectin. The lectin extracted from seeds of bitter gourd preferably has a molecular weight between 100,000 and 170,000 measured with poly-acrylamide gel electrophoresis in existence of sodium dodecyl sulfate (SDS-PAGE). A method of checking a blood type includes the steps of: extracting lectin from seeds of bitter gourd, balsam pear, or Momordica charantia; preparing a blood type checking reagent containing the lectin; and checking a blood type using the blood type checking reagent.

Abstract: A measurement body is provided with a sub-outlet arranged between a U-turn portion of a bypass passage and a main outlet. The sub-outlet includes a first sub-outlet positioned on a path of air, which flows on the inside of the bypass passage, and a second sub-outlet positioned on a path of air, which flows on the outside of the bypass passage. The respective sub-outlets open in a sidewall surface of the measurement body along the thickness-wise direction. However, the first sub-outlet and the second sub-outlet are arranged in different positions with respect to the flow direction of measurement air. With this structure, a substantial length of the bypass passage can be adjusted in accordance with positions of the first sub-outlet and the second sub-outlet, so that compensation of intake pulsation is enhanced in accuracy. Thereby, measurement error caused by influences of intake pulsation can be reduced.

Abstract: Lectin for checking a blood type is extracted from seeds of bitter gourd, balsam pear, or Momordica charantia. A blood type checking reagent includes the lectin. The lectin extracted from seeds of bitter gourd preferably has a molecular weight between 100,000 and 170,000 measured with poly-acrylamide gel electrophoresis in existence of sodium dodecyl sulfate (SDS-PAGE). A method of checking a blood type includes the steps of: extracting lectin from seeds of bitter gourd, balsam pear, or Momordica charantia; preparing a blood type checking reagent containing the lectin; and checking a blood type using the blood type checking reagent.

Abstract: A measurement body is provided with a sub-outlet arranged between a U-turn portion of a bypass passage and a main outlet. The sub-outlet includes a first sub-outlet positioned on a path of air, which flows on the inside of the bypass passage, and a second sub-outlet positioned on a path of air, which flows on the outside of the bypass passage. The respective sub-outlets open in a sidewall surface of the measurement body along the thickness-wise direction. However, the first sub-outlet and the second sub-outlet are arranged in different positions with respect to the flow direction of measurement air. With this structure, a substantial length of the bypass passage can be adjusted in accordance with positions of the first sub-outlet and the second sub-outlet, so that compensation of intake pulsation is enhanced in accuracy. Thereby, measurement error caused by influences of intake pulsation can be reduced.