Risa Hamada
Nagoya University
6 Papers
8 Citations
Risa Hamada is an academic researcher from Nagoya University. The author has contributed to research in topics: Urine & Biology. The author has an hindex of 2, co-authored 4 publications.
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Papers
Temporal trend and cross-sectional characterization of urinary concentrations of glyphosate in Japanese children from 2006 to 2015.
Hiroshi Nomura,Risa Hamada,Keiko Wada,Isao Saito,Nanami Nishihara,Yugo Kitahara,S. Watanabe,Kunihiko Nakane,Chisato Nagata,Takaaki Kondo,Michihiro Kamijima,Jun Ueyama +11 more
TL;DR: In this article , the International Agency for Research on Cancer classified Gly as a "probably carcinogenic to humans (Group 2A)" in 2015, and analyzed first-morning urine samples of Japanese children to determine temporal changes, seasonal changes, and gender differences.
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Optimization and validation of a highly sensitive method for determining glyphosate in human urine by solid-phase extraction and liquid chromatography with tandem mass spectrometry: a methodological study
Hiroshi Nomura,Risa Hamada,Isao Saito,Kunihiko Nakane,Ritsuko Sawa,Miwa Ukai,Eiji Shibata,Mitsuo Sato,Michihiro Kamijima,Jun Ueyama +9 more
TL;DR: In this article, the authors developed a sensitive and high-throughput analytical method for urinary glyphosate using liquid chromatography-tandem mass spectrometry with the aim of contributing to glyphosate exposure assessment in epidemiological studies.
A sensitive and efficient procedure for the high-throughput determination of nine urinary metabolites of pyrethroids by GC-MS/MS and its application in a sample of Japanese children
TL;DR: A sensitive and high-throughput determination method for urinary metabolites derived from the newly developed PYR, e.g., trans-chrysanthemumdicarboxylic acid (trans-CDCA), which may be a pivotal tool for developing risk assessment from PYR exposure in the general population.
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Ten-year temporal trends (2006-2015) and seasonal-differences in urinary metabolite concentrations of novel, hygiene-used pyrethroids in Japanese children.
Risa Hamada,Yuko Ueda,Keiko Wada,Isao Saito,Hiroshi Nomura,Michihiro Kamijima,Kunihiko Nakane,Chisato Nagata,Takaaki Kondo,Jun Ueyama +9 more
TL;DR: Findings suggest that, in Japanese children, exposure to hygiene-PYRs has increased over the past decade, and that children are exposed to higher levels of hygiene- PYRs in summer than in winter.
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Simultaneous quantification of pyrethroid metabolites in urine of non-toilet-trained children in Japan
Jun Ueyama,Yuki Ito,Risa Hamada,Naoko Oya,Sayaka Kato,Taro Matsuki,Hazuki Tamada,Kayo Kaneko,Shinji Saitoh,Mayumi Sugiura-Ogasawara,Takeshi Ebara,Michihiro Kamijima +11 more
TL;DR: This biomonitoring survey found widespread and seasonally specific exposure to multiple hygiene- and agriculture-PYRs in 1.5-year-old Japanese children.