著者
山中 泰彦 森田 政明 洞口 公俊 山吉 孝雄 杉浦 渉
出版者
一般社団法人 照明学会
雑誌
照明学会誌 (ISSN:00192341)
巻号頁・発行日
vol.87, no.2, pp.119-126, 2003-02-01 (Released:2011-07-19)
参考文献数
18
被引用文献数
4 3

The effects of germicidal radiation on water has shown many good properties, and the method is applied to several purposes including and purifying drinking water, pure disinfecting water. In this paper we discuss the theoretical and practical results of germicidal effects on both of using a cylindrical germicidal tank with a germicidal lamp in the center on still and flowing water. We are describe the water transmission properties that we developed for the germicidal radiation. The four tables below show the results of our experiments.Table 1 Index of natural water and permeation rate (τ)Table 2 The properties of dissolving material in cooling tower waterTable 3 Germicidal time for E-coliTable 4 Experimental results of twin-type circulation water disinfection
著者
村上 克介 洞口 公俊 森田 政明 相賀 一郎
出版者
Japanese Society of Agricultural, Biological and Environmental Engineers and Scientists
雑誌
生物環境調節 (ISSN:05824087)
巻号頁・発行日
vol.29, no.2, pp.73-79, 1991-06-30 (Released:2010-06-22)
参考文献数
12
被引用文献数
4 8

The seedlings of sunflower (Helianthus annuus L. cv. Russian Mammoth) were hydroponic-cultured in a controlled environment at 25°C and at 70% relative humidity. Using three band fluorescent lamps (5000 K) as the main lighting source, the PPFD (400-700 nm) was kept at 200, μmol⋅m-2⋅s-1, and each additional PFD (700-800 nm) of far-red (FR) irradiation in four experiments, using FR fluorescent lamps, was kept at 107.1, 50.1, 25.6, and 9.3 umol⋅m-2⋅s-1, respectively.According to the additional level of FR irradiation, the fresh weight, dry weight, leaf area and stem length of the seedlings were increased. The stem length was extended greatly by additional FR irradiation, and leaf/stem dry weight ratio was also changed. Eight days after the treatment by FR irradiation, the stem length was extended 3.8 times longer in FR, 107.1, μmol⋅m-2⋅s-1 treatment in comparison with the 9.3μmol⋅m-2⋅s-1treatment, and leaf/stem dry weight ratio was 5.8 to 2.7.It was found that stem extension and leaf/stem dry weight ratio could be controlled artificially by the level of the additional FR irradiation. As a result, it indicates that the evaluation of FR irradiation may be useful in designing the lighting conditions of plant factories or in atria.