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Результаты 291-300 из 306
Evaluation of the eutrophication in precipitation based on an algal assay procedure
1981
Sasaki, K. (Nagano-ken. Research Inst. for Health and Pollution (Japan))
Odor from a pig-breeding farm
1981
Satsumabayashi, H. (Nagano-ken. Research Inst. for Health and Pollution (Japan)) | Sasaki, K. | Nakazawa, Y.
Ecological studies of Salmonella, 2: Incidence of Salmonella in local city sewage and its relation between isolates from humans
1981
Muramatsu, K. (Nagano-ken. Research Inst. for Health and Pollution (Japan))
A survey of the incidence of Salmonella in samples collected from three treatment plants of sewage, food-poisoning, sporadic case with acute enteritis and healthy carrier in a local city, was performed from Aprile 1974 to December 1978. Salmonella were very frequently found in Influent sewage. The range of sewage source serovars found was wide and most aerovara were related with human source. A total of 954 strains and 62 serovars of Salmonella were found in sewage and human source. S. typhimurium, S.tennessee, S.thompson, S.infantis, S. senftenberg and S.oranienberg were the most frequent aerovars. It might be presumed that the environmental contamination of the area by the organisms is increasing gradually, since new aerovars of Salmonella, for example S.havana, S.agona, S.london, S. mission and S.cerro etc., which were never found in Nagano prefecture before, were isolated in the area. Effect of addition of the Aluminum sulfate and Polyacrylamide for Salmonella isolation from sewage, were studied. By use of the floe method. Salmonella were more frequently isolated from influent sewage.
Показать больше [+] Меньше [-]The analytical method for chlorophyll degradation products in sediment and an investigation of Lake Suwa [Nagano, Japan]
1981
Seki, H. (Nagano-ken. Research Inst. for Health and Pollution (Japan)) | Akaoka, T. | Kono, Y. | Ogihara, K.
Estimation of vehicles in food poisoning by statistical methods
1981
Wada, M. (Nagano-ken. Research Inst. for Health and Pollution (Japan)) | Katsuno, T. | Muramatsu, K.
Eutrophication in lakes and the trophic state index
1981
Kawamura, M. (Nagano-ken. Research Inst. for Health and Pollution (Japan)) | Higuchi, S.
Microbial degradation of polyurethane foams and isocyanate based polyureas in different media Полный текст
1981
Martens, Rainer | Domsch, Klaus Heinz
A Method of selecting forest sites for air pollution study
1981
Bringi, Sreedevi K (Sreedevi Krishnamurthy) | Seliga, Thomas A. | Dochinger, Leon S.
Abstract: Presents a method of selecting suitable forested areas for meaningful assessments of air pollution effects. The approach is based on the premise that environmental influences can significantly affect the forest-air pollution relationship, and that it is, therefore, desirable to equalize such influences at different sites. From existing data on environmental factors and air pollution monitoring data, a method of placing transparent overlays on maps was developed to identify forested areas that have common environmental characteristics but significantly different potential for air pollution.
Показать больше [+] Меньше [-]Proceedings of the Groundwater Pollution Conference
1981
Lawrence, C. R. | Hughes, R. J (Roger John)