摘要:
It is an objective of the present invention to provide a positron tomography method applicable to the diagnosis of specific brain diseases and to provide a positron-emitting compound for use in the method. The present invention method relates to a positron tomography method for measuring a distribution and concentration of a positron-emitting source, and is characterized in using the compound (I) as the positron-emitting source. [wherein, R represents a C1-6 alkyl group or a halogen atom group, having positron-emitting capability]
摘要:
Provided is a vinyl polymer of a sulfonated monomer having a basic skeleton represented by the following formula (1), wherein x is 1 to 20 and n is 10 to 10,000.Also provided is a novel hydrocarbon vinyl polymer aimed at providing a hydrocarbon solid polymer electrolyte which can become a substitute for a fluorine electrolyte, and which has chemical and physical properties sufficient for practical use, yet can be produced at a low cost. Additionally, provided is a polymer electrolyte membrane suitable as the ion-exchange membrane of a solid polymer fuel cell by employing the polymer of a sulfonated vinyl monomer which has excellent film-forming properties and a large ion-exchange capacity (EW).