生活衛生
Online ISSN : 1883-6631
Print ISSN : 0582-4176
ISSN-L : 0582-4176
52 巻, 2 号
選択された号の論文の5件中1~5を表示しています
総説
  • ―雨天時水質汚濁の現状と対策―
    新矢 将尚
    2008 年 52 巻 2 号 p. 87-97
    発行日: 2008年
    公開日: 2008/04/07
    ジャーナル フリー
    Non-point pollution is caused by pollutant loads outflowing from diffuse sources other than point sources, such as domestic effluent, factories, and mines. Especially in urban areas, road surfaces have a high potential for non-point pollution. The present review presents actual conditions, impacts, measures and perspectives relating to non-point pollution in urban areas, with reference also to problems and countermeasures relating to the sewerage system. The implementation of countermeasures against non-point pollution will contribute to the future improvement of the quality of the water environment.
報文
  • 濱田 信夫, 阿部 仁一郎
    2008 年 52 巻 2 号 p. 98-106
    発行日: 2008年
    公開日: 2008/04/07
    ジャーナル フリー
    The fungal flora of bathrooms was examined using a modified medium. PDA medium consisting to one-fourth of nutrient was used for detecting fungi. This low-nutrient medium was thought to be convenient for detecting slow-growing fungi while suppressing fast-growing yeast. Heavy fungal contamination was found on toys, soap dishes, and in the drain mouth. Characteristic mold genera in the bathrooms were Exophiala, Cladophialophora, Phoma and Scolecobasidium, which, in contrast to elsewhere, were more predominant than Cladosporium and Acremonium inside bathrooms. Cladophialophora in particular is not common in indoor environments, and the specimen was identified using genetic data. Of the yeasts, Rhodotorula was predominant in all areas of the bathroom. Molds characteristically found in bathrooms were similar to those found inside washing machine using detergent. Exophiala, Phoma, Cladophialophora and Scolecobasidium were also predominant in the lower areas and in unit-type bathrooms. In contrast, Cladosporium and Aureobasidium were predominant in the upper areas of the bathroom in all seasons and seemed to use glycerides derived from human skin as nutrient. Also discussed are factors affecting the differing distribution of Cladosporium, Exophiala, and other molds.
ノート
  • 大島 詔, 北野 雅昭, 福山 丈二
    2008 年 52 巻 2 号 p. 107-111
    発行日: 2008年
    公開日: 2008/04/07
    ジャーナル フリー
    A mass fish death occurred at Minami-Sotobori (moat) in Osaka-Jo Park on Oct. 4, 2007. It was reported that more than a thousand fish died. Features of the mass death were: 1) it involved many of the fish species that live in the moat, 2) most were fish with long body length and died with open mouth, 3) dissolved oxygen was 3.1 mg·L-1 or less throughout the water column. It was judged that the fish had died of anoxia. The air temperature had decreased rapidly seven days before the fatal accident and low temperatures continued for four days. As a result, it is thought that the epilimnion was cooled strongly and sank to the bottom during this period and that the hypolimnion, which contains less oxygen, welled up. Since the hypolimnion seems to become anaerobic under organic loading for long periods, it is possible that similar accidents will happen again when water stratification breaks down for some reason.
資料
feedback
Top