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Munetaka ISHIKAWA
1999 Volume 28 Issue 8 Pages
523-526
Published: August 20, 1999
Released on J-STAGE: March 18, 2010
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Hidenari YASUI, Tetsuro FUKASE, Yoshio SAKAI, Ryuji MATSUHASHI
1999 Volume 28 Issue 8 Pages
527-531
Published: August 20, 1999
Released on J-STAGE: March 18, 2010
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Noriaki SHIOTA, Akira AKASHI, Susumu HASEGAWA
1999 Volume 28 Issue 8 Pages
532-534
Published: August 20, 1999
Released on J-STAGE: March 18, 2010
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Yoshimasa KINOSHITA, Munetaka ISHIKAWA
1999 Volume 28 Issue 8 Pages
535-538
Published: August 20, 1999
Released on J-STAGE: March 18, 2010
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Yasuhiro KOSAKI, Eiichi TASHIRO, Munetaka ISHIKAWA
1999 Volume 28 Issue 8 Pages
539-542
Published: August 20, 1999
Released on J-STAGE: March 18, 2010
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Masahiko NIHEI
1999 Volume 28 Issue 8 Pages
543-546
Published: August 20, 1999
Released on J-STAGE: March 18, 2010
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Hajime SHINOHARA, Munetaka ISHIKAWA
1999 Volume 28 Issue 8 Pages
547-551
Published: August 20, 1999
Released on J-STAGE: March 18, 2010
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Tatsuya UEJIMA
1999 Volume 28 Issue 8 Pages
552-555
Published: August 20, 1999
Released on J-STAGE: March 18, 2010
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Tsuyoshi IMAI, Masayuki FUKAGAWA, Hirofumi NAGATA, Toshio HARADA, Masa ...
1999 Volume 28 Issue 8 Pages
556-561
Published: August 20, 1999
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Yoshito NAWA
1999 Volume 28 Issue 8 Pages
562-565
Published: August 20, 1999
Released on J-STAGE: March 18, 2010
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Sadaaki MURAKAMI, Minoru TANIGUCHI, Hideo SHIMIZU, Masami TAKEUCHI, Mu ...
1999 Volume 28 Issue 8 Pages
566-570
Published: August 20, 1999
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[in Japanese]
1999 Volume 28 Issue 8 Pages
571-572
Published: August 20, 1999
Released on J-STAGE: March 18, 2010
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Akihito OHTAKI, Hiroyuki TAKANO, Gaku SATO, Masaomi WATANABE, Kiyohiko ...
1999 Volume 28 Issue 8 Pages
573-578
Published: August 20, 1999
Released on J-STAGE: March 18, 2010
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Night-soil sludge contains a high percentage of nitrogen and generates a large amount of ammonia, a malodorant compound during composting. The purpose of this research was to study on the effects of operational conditions of composting on the decomposed amount of organic compounds and that of ammonia emission. The optimum conditions for high speed composting of night-soil sludge for speedy decomposition of organic compounds were a temperature around 60°C, weakly alkaline conditions with a pH 7.2 or higher and a moisture content ranging from about 40 to about 60%, respectively. It was also found that the type of seeding material scarcely affected the decomposition speed of organic compounds. The amount of ammonia emission was almost directly proportional to that of organic compound decomposition for most cases of composting operational conditions. There was elucidated, however, that there were some cases where the decomposed amount of organic compound was not directly proportional to the amount of ammonia emission, where the moisture content was low, the proportion of the amount of ammonia emission was larger than that expected from the decomposed amount of organic compounds; and where the temperature was high or where the pH was low, the proportion of the amount of ammonia emission was smaller than that expected from the decomposed amount of organic compounds.
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Takako NOBUKAWA, Satoshi SANUKIDA
1999 Volume 28 Issue 8 Pages
579-585
Published: August 20, 1999
Released on J-STAGE: March 18, 2010
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Water quality was evaluated from the viewpoint of mutagenicity of drinking water. And, this study focused on the evaluation of the genotoxic characteristics of chlorinated and brominated substances produced by chlorination of the river waters containig bromide ions. Thus, the mutagenic activities of drinking waters, and disinfected river waters and sewage effluents were measured by Ames tests using
S.typhimurium strains TA100 and TA98, and by chromosomal aberration test using cultured Chinese hamster lung cells (CHL/IU)
in vitro. After flowing samples through CSP800 or XAD-2 resin column, absorbed substances were dissolved in dimethyl sulfoxide, and submitted to the mutagenicity assays.
Mutagenic activities of the drinking waters produced by chlorination were observed to be higher than those by ozonation. Mutagenic activities showed different characteristics in mutagenic potentials and induced aberrant cells caused by by-products when bromide ions were substituted for chloride ions with various ratios.
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[in Japanese]
1999 Volume 28 Issue 8 Pages
586-590
Published: August 20, 1999
Released on J-STAGE: March 18, 2010
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Yoriyuki YAMADA
1999 Volume 28 Issue 8 Pages
591-596
Published: August 20, 1999
Released on J-STAGE: March 18, 2010
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Ichiro OKADA, Katsuhiro YAMAMOTO, Tetsuo MINAMI, Shinji NAKAI
1999 Volume 28 Issue 8 Pages
597-601
Published: August 20, 1999
Released on J-STAGE: March 18, 2010
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[in Japanese]
1999 Volume 28 Issue 8 Pages
602-604
Published: August 20, 1999
Released on J-STAGE: March 18, 2010
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