文献一覧: 北野大 (著者)

10 0 0 0 OA 東京都内地下水における有機フッ素化合物の汚染実態と土壌浸透実験における挙動の考察

著者: 西野貴裕加藤みか下間志正北野大
出版者: 一般社団法人日本環境化学会
雑誌: 環境化学 (ISSN:09172408)
巻号頁・発行日: vol.25, no.3, pp.149-160, 2015-09-04 (Released:2016-03-18)
参考文献数: 43
被引用文献数: 1

We measured 13 perfluorinated compounds (PFCs) in the groundwater in Tokyo. PFCs with nine carbons or fewer were frequently detected. PFOS and PFOA were detected at high concentrations, despite discharge reduction measures taken since 2010. Chromatograms of PFOS showed variations in the peak area ratio between linear-PFOS and branched-PFOS with the sampling points. To investigate the cause, leaching experiments were conducted for the 13 PFCs and branched-PFOS isomers. The results show that branched-PFOS penetrated the soil faster than linear-PFOS, and shorter chain PFCs faster than longer-chain PFCs. Long chain PFCs with more than 10 carbons were expected to remain in soil.

2023-06-16 10:12:57
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4 0 0 0 OA 高分子物質の人と環境に対する安全性評価

著者: 北野大
出版者: 一般社団法人日本ゴム協会
雑誌: 日本ゴム協会誌 (ISSN:0029022X)
巻号頁・発行日: vol.66, no.7, pp.454-472, 1993 (Released:2007-07-09)
参考文献数: 4

2022-10-18 00:39:47
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1 0 0 0 OA 多摩川水系における有機フッ素化合物の汚染実態の変化とその収支

著者: 西野貴裕上野孝司高橋明宏高澤嘉一柴田康行仲摩翔太北野大
出版者: 一般社団法人日本環境化学会
雑誌: 環境化学 (ISSN:09172408)
巻号頁・発行日: vol.23, no.4, pp.177-186, 2013 (Released:2014-06-20)
参考文献数: 36
被引用文献数: 2 1

13 kind of Perfluorinated compounds (PFCs) in the mainstream of Tamagawa River and its inflows (tributaries, and effluents from Sewage Treatment Plants) were analyzed, and the loads of PFOS, PFOA and other 4 compounds were evaluated. The concentrations of PFOS and PFOA were found to be much lower than those of 2005 since 2009. This result indicates that the Stockholm Convention on Persisitent Organic Pollutants (POPs) and 2010/2015 PFOA Stewardship Program are effective. The cumulative load of PFCs that was accumulated in the inflows sequentially from Nagata Bridge, as the uppermost point in this study, closely resembled the measured load at each sampling point in Tamagawa River. These results indicate that PFCs were scarcely degraded, volatilized, during flow down the river. The ratio of PFCs with longer chain length such as PFUnDA and PFTrDA in sediment samples were much higher than those of water ones.

2023-01-31 04:54:00
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1 0 0 0 OA 轉轆轆地禅と西田先生

著者: 北野大雲
出版者: 西田哲学会
雑誌: 西田哲学会年報 (ISSN:21881995)
巻号頁・発行日: vol.12, pp.18-33, 2015 (Released:2020-03-21)

1)Nagaoka Zenjuku is a training dojo(hall)of Zen primarily for university students. Its second head master, Shonen Morimoto Roshi was a disciple of Kitaro Nishida. Therefore, Nagaoka Zenjuku was related to Nishida and, through him, to Daisetz Suzuki. The photographs show Morimoto Roshi sitting in front of calligraphies, one by Nishida(「心月孤円光呑万象」)and the other one by Suzuki (「無事甲」). The calligrapher, the meaning of the calligraphy and the sitting figure of Morimoto Rohshi form a fine trinity in each of the photographs. 2)Nishida lived a life of Nothingness by practicing the way of Zen. In my opinion, the fundamental character of Nothingness is to turn freely, becoming Great Wisdom(prajñā). Regarding Nishida, the process of understanding Zen, the unfolding of the philosophical thinking and the quality of his philosophy are all none other than the free turning of Nothingness itself. For example, Nishida mentions “the development of a certain unifying reality” in An Inquiry into the Good. But why does it develop? Because the very thing of the reality is Nothingness and it turns freely. The dynamics of “history”, “poiesis”, “creativity” and the like in the later philosophy of Nishida come from the activity of Nothingness.