Abstract: The nuclear spin hyperpolarization method includes the steps of: irradiating a sample, prepared by doping solid benzoic acid derivative with a pentacene derivative, placed in a space where a static magnetic field is formed by a main magnetic field forming unit, with a laser beam from a laser source; following the light irradiation, irradiating the sample with a microwave from a microwave source while applying a sweeping magnetic field; and after repeating the application of sweeping magnetic field, light irradiation and microwave irradiation, dissolving the benzoic acid derivative in the sample. This enables generation of an aqueous solution containing benzoic acid derivative of which nuclear spins are hyperpolarized.

Abstract: The nuclear spin hyperpolarization method includes the steps of: irradiating a sample, prepared by doping solid benzoic acid derivative with a pentacene derivative, placed in a space where a static magnetic field is formed by a main magnetic field forming unit, with a laser beam from a laser source; following the light irradiation, irradiating the sample with a microwave from a microwave source while applying a sweeping magnetic field; and after repeating the application of sweeping magnetic field, light irradiation and microwave irradiation, dissolving the benzoic acid derivative in the sample. This enables generation of an aqueous solution containing benzoic acid derivative of which nuclear spins are hyperpolarized.

Abstract: A power supply apparatus of an engine electrical system reliably starts the engine even in a battery-less apparatus or in a condition that the battery is completely discharged. The power generated in an AC generator 11 is supplied to a power supply line L via a regulator 12. The power supply line L is connected to a capacitor 13 and electronic control unit (ECU) 14. A fuel injection system (FI system) 15 is connected to the power supply line L1 via a first switch 17. The electronic control unit 14 monitors the voltage of the power supply line L1. In kick starting, the first switch 17 is set at OFF, and turned ON when the measured voltage is a reference voltage value or more.