Abstract: A toy vehicle transformable between first and second forms includes an undercarriage, a top member having first and second surfaces serving as upper surfaces of the vehicle in the first and second forms, respectively, a front member rotatably connected to the front end portion of the top member, where the front member has first and second surfaces serving as front surfaces of the vehicle in the first and second forms, respectively, and a connector that connects the rear end portion of the top member to the undercarriage and that includes a separation rotation shaft for supporting the top member for rotation in a direction in which the top member moves away from the undercarriage and a turnover rotation shaft for supporting the top member for rotation in a direction in which the top member is turned over.

Abstract: The present invention provides a method of preparing stably and at a high yield a purine nucleoside compound by utilizing an exchange reaction of a nucleic acid base which is carried out in the presence of an enzyme, and also provides a microorganism capable of producing uracil thymine dehydrogenase or dihydrouracil dehydrogenase. In preparing the purine nucleoside compound, a pyrimidine nucleoside compound and a purine base are subjected to a base exchange reaction in an aqueous solution containing phosphate ions in the presence of pyrimidine nucleoside phosphorylase and purine nucleoside phosphorylase. The pyrimidine base formed by the base exchange reaction is converted by a microorganism or an enzyme derived from the microorganism into a compound incapable of acting as substrates of pyrimidine nucleoside phosphorylase and purine nucleoside phosphorylase so as to obtain a desired product of purine nucleoside compound.

Abstract: Contained relationship between instances of a Management Information Base under OSI management, such as parent-child or brother-brother relationships are retained in containment relationship files, which are prepared for each depth level of a containment tree. Management information of the instances are stored in instance files, which are separated for each managed object class. A file storing the containment relationship points to the management information in the instance file with a pointer. The instance file stores the maximum number of attributes and the maximum attribute size and the update time for the management information of each instance.