The Effectiveness of Japan's Community Centers in Facilitating Social Participation and Maintaining the Functional Capacity of Older People.

This study examines the effectiveness of a community center in Japan at promoting social participation and sustaining its regular users' functional capacity. The surveys were distributed to 108 physically and cognitively independent local older people; 72 responses were received. There were 16 regular users and 56 nonregular users. An inverse probability of treatment-weighted Poisson regression analysis was performed, and prevalence rate ratios were computed for social participation and functional capacity according to respondents' use of the center. Results showed that using the center regularly facilitated social participation, contributing to the maintenance of living functions. Regular users' social participation was promoted through opportunities in sports and volunteer organizations. Their living functions were maintained through instrumental self-maintenance and intellectual activity. Community centers evidently enable beneficial gatherings of older people, encourage social participation, and help to maintain higher level activities of daily living. Thus, they might offer effective preventative care for older people.

Polyphasic characterization of a PCP-to-phenol dechlorinating microbial community enriched from paddy soil.

Dechlorination of PCP has been observed previously under anaerobic condition in paddy soil. However, there is poor information about the dechlorination pathway of PCP and the microbial community associated with the PCP dechlorination in paddy soil. In this study, an anaerobic microbial community dechlorinating PCP was enriched by serial transfers from a paddy soil using a medium containing PCP, lactate and the steam-sterilized paddy soil. The enriched microbial community dechlorinated PCP completely to phenol under the anaerobic condition by a dechlorinating pathway as follows; PCP-->2,3,4,5-tetrachlorophenol-->3,4,5-trichlorophenol-->3,5-dichlorophenol-->3-chlorophenol-->phenol. Intermediate products such as 3-chlorophenol were not accumulated, which were immediately dechlorinated to phenol. The enriched microbial community was characterized physiologically by testing the effects of electron donors and electron acceptors on the dechlorinating activity. The dechlorinating activity was promoted with lactate, pyruvate, and hydrogen as electron donors but not with acetate. Electron acceptors, nitrate and sulphate, inhibited the dechlorinating activity competitively but not iron (III). The microbial group associated with the anaerobic dechlorination was characterized by the effect of specific inhibitors on the PCP dechlorination. Effects of specific metabolic inhibitors and antibiotics indicated the involvement of Gram-positive spore-forming bacteria with the PCP dechlorinating activity, which was represented as bacteria of phylum Firmicutes. The structure of the microbial community was characterized by fluorescence in situ hybridization, quinone profiling, and PCR-DGGE (denaturing gel gradient electrophoresis). The combined results indicated the predominance of Clostridium species of phylum Firmicutes in the microbial community. Desulfitobacterium spp. known as anaerobic Gram-positive spore-forming bacteria dechlorinating PCP were not detected by PCR using a specific primer set. These indicated a probable presence of novel anaerobic Gram-positive spore-forming bacteria dechlorinating PCP in the microbial community.