Abstract: Provided is a polarization source having high oxygen resistance and capable of stably transitioning the spin polarization of electron to nucleus even in an environment where oxygen exists. A polarization source for dynamic nuclear polarization containing a molecule represented by the following general formula. One to six of Z1 to Z10 each represent N, and the others each independently represent C—R. R represents a hydrogen atom or a substituent. n represents an integer of 1 to 4.

Abstract: Disclosed is a composition of a polarization source dispersed in an aqueous medium. Preferably, the polarization source forms a composite with a host. As the aqueous medium, a hydrogel is also usable in addition to water.

Abstract: A color reproduction system using a medicine bag including a bag adapted to accommodate a medicine therein, and a color chart provided on an outer surface of the bag. The medicine bag includes a first medicine bag having a first color chart and located at a first location and a second medicine bag having a second color chart and located at a second location remote from the first location. The color reproducing system includes: a first device, located at the first location, and operable to read the first color chart so as to generate first color data; and a second device, located at the second location, and operable to transmit image data of an object and second color data of the second color chart to the first device. The first device corrects the image data by using a correction value based on the first color data and the second color data, and displays the corrected image data.

Abstract: A color reproduction system using a medicine bag including a bag adapted to accommodate a medicine therein, and a color chart provided on an outer surface of the bag. The medicine bag includes a first medicine bag having a first color chart and located at a first location and a second medicine bag having a second color chart and located at a second location remote from the first location. The color reproducing system includes: a first device, located at the first location, and operable to read the first color chart so as to generate first color data; and a second device, located at the second location, and operable to transmit image data of an object and second color data of the second color chart to the first device. The first device corrects the image data by using a correction value based on the first color data and the second color data, and displays the corrected image data.