Tsukuba science city: Japan tries planned innovation.

Tsukuba Science City is Japan's new municipal complex of research laboratories and educational facilities. About 30 percent of the nation's government research laboratories and more than 40 percent of its government research manpower are concentrated in the community. A brief history of the monumental project is presented and problems confronting the city are discussed.

Psychiatric participation in the Hootch case: effects on Alaska native education.

The Hootch case was a class action suit that established the right of Alaska Native students to attend secondary school in their home communities. The authors review the history of Native education, give the background of the suit, and present behavioral science data on school adjustment of Alaska Natives and American Indian students. These data, included in an amicus curiae brief, were incorporated into the court decision. The authors consider this case a positive example of psychiatric involvement in social policy matters.

Continued reproductive potential in aging platyfish as demonstrated by the persistence of gonadotropin, luteinizing hormone releasing hormone and spermatogenesis.

Male platyfish, Xiphophorus maculatus, ranging in age from 12 to 54 months (normal life span is 30 months), were examined for age-related changes in the distribution of immunoreactive gonadotropin (ir-GTH) and luteinizing hormone releasing hormone (ir-LHRH) in their pituitary glands, and for changes in the histology of their testes. Males sacrificed at 13 and 16 months of age served as controls. Immunocytochemical methods demonstrate that even in the oldest fish, some almost twice the average platyfish life span, ir-GTH and ir-LHRH are localized in the same pituitary cell types in the caudal pars distalis and pars intermedia as in younger sexually mature fish. The testes of old fish continue to contain all stages of spermatogenesis; however, there are age-related increases in the amount of intertubular connective tissue and the relative number of spermatozeugmata, and distortions in the organization of acini. Our observations indicate that GTH and LHRH production and spermatogenesis continue, and thus a potential for reproductive capability persists, in male platyfish up to the time of their death resulting from old age.