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
鎌田 基司 村上 克介 松本 隆仁 村瀬 治比古 諸見里 聰 増田 篤稔 洞口 公俊 向阪 信一
出版者
一般社団法人 照明学会
雑誌
照明学会 全国大会講演論文集
巻号頁・発行日
vol.35, pp.159, 2002

モズクは健康食品として消費が伸びてきている。モズク養殖生産の効率化と安定化を図る上で、光環境の作用&middot;効果の解明が必要である。そこで光環境の基礎的知見を得るため、モズク盤状体の光合成特性について実験検討を行った。培養には40W3波長形蛍光ランプを用いた。光合成特性は光合成有効光子照度(PPFD)を0&sim;1000&mu;mol m<SUP>-2</SUP>s<SUP>-1</SUP>として測定した。実験検討の結果、日数の経過とともに盤状体の濃度は高まり、光の透過率が低くなった。高濃度のモズクは低濃度のモズクより低いPPFDで酸素発生速度が速くなる結果が得られた。モズク盤状体の光合成における最適な光飽和点は150&sim;300&mu;mol m<SUP>-2</SUP>s<SUP>-1</SUP>であった。今後、モズクの光合成特性の測定&middot;把握と併せて、補光設備を配設した実験用人工採苗水槽試作機での実験を重ねていきたい。
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.
著者
向阪 信一 洞口 公俊 齋藤 直樹 上條 和彦 黒越 治 村上 克介
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.90, no.11, pp.808-815, 2006-11-01
被引用文献数
6

For stable mass production of vegetable seedlings with good quality, a commercial greenhouse nursery needs a supplemental lighting system that is not affected by light fluctuations under natural solar conditions. Therefore, a practical plant nursery covering a 12 ×24 m area, and using a supplemental lighting system, was developed for the growth of vegetable seedlings. The developed lighting system had 400-W mercury-free, high pressure sodium lamps with reflectors, which produced a red radiation to far-red radiation photon flux(R/FR PF)ratio of 1.1. This is similar to that of solar radiation. And over about 60 µml m-2 s-1 of PPFD was realized for stable and healthy gronth of vegetable seedlings. By using a simulation model of horizontal distribution of PPFD on two cultivation beds(each bed area: 4.6 × 22.6 m) under 100lamps, it was found that the system had high uniformity of lighting on the two beds. Observed value of illulninance and PPFD and unifomity also satisfied the planned specifications. By repeating a seedling growth experiment using various plants in this greenhouse,it is expected that the practical and effective use of this supplemental lighting system will be possible in rainy seasons or in the late winter period.