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Y. Okayasu
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Journal Articles

Mass balance analysis of triclosan, diethyltoluamide, crotamiton and carbamazepine in sewage treatment plants

N. Nakada, M. Yasojima, Y. Okayasu, K. Komori, Y. Suzuki
Water Science and Technology (1 April 2010) 61 (7): 1739–1747.
DOI: https://doi.org/10.2166/wst.2010.100
Date Online: 01 April 2010
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Journal Articles

The use of enzyme-linked immunosorbent assays (ELISA) for the determination of pollutants in environmental and industrial wastes

M. Hirobe, Y. Goda, Y. Okayasu, J. Tomita, H. Takigami ...
Water Science and Technology (1 December 2006) 54 (11-12): 1–9.
DOI: https://doi.org/10.2166/wst.2006.735
Date Online: 01 December 2006
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Journal Articles

Occurrence of nonylphenol, nonylphenol ethoxylate surfactants and nonylphenol carboxylic acids in wastewater in Japan

K. Komori, Y. Okayasu, M. Yasojima, Y. Suzuki, H. Tanaka
Water Science and Technology (1 May 2006) 53 (11): 27–33.
DOI: https://doi.org/10.2166/wst.2006.334
Date Online: 01 May 2006
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Journal Articles

Fate of oestrogenic compounds and identification of oestrogenicity in a wastewater treatment process

N. Nakada, M. Yasojima, Y. Okayasu, K. Komori, H. Tanaka ...
Water Science and Technology (1 May 2006) 53 (11): 51–63.
DOI: https://doi.org/10.2166/wst.2006.337
Date Online: 01 May 2006
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Journal Articles

Biosensor-based control of nitrification inhibitor in municipal wastewater treatment plants

Y. Okayasu, H. Tanaka, T. Inui, Y. Tanaka
Water Science and Technology (1 February 2006) 53 (4-5): 357–366.
DOI: https://doi.org/10.2166/wst.2006.141
Date Online: 01 February 2006
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Journal Articles

Distribution of estrogen, nonylphenol and its derivatives in the sediments of a shallow lake

K. Mibu, J. Wada, Y. Okayasu, J. Tsumori, K. Komori ...
Water Science and Technology (1 September 2004) 50 (5): 173–179.
DOI: https://doi.org/10.2166/wst.2004.0325
Date Online: 01 September 2004
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Journal Articles

Analysis and occurrence of estrogen in wastewater in Japan

K. Komori, H. Tanaka, Y. Okayasu, M. Yasojima, C. Sato
Water Science and Technology (1 September 2004) 50 (5): 93–100.
DOI: https://doi.org/10.2166/wst.2004.0314
Date Online: 01 September 2004
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Journal Articles

Application of toxicity monitor using nitrifying bacteria biosensor to sewerage systems

T. Inui, Y. Tanaka, Y. Okayasu, H. Tanaka
Water Science and Technology (1 February 2002) 45 (4-5): 271–278.
DOI: https://doi.org/10.2166/wst.2002.0603
Date Online: 01 February 2002
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