A5054106558- Photochromic and Fluorescence Chemistry
- Analytical chemistry methods development
- Pharmaceutical and Antibiotic Environmental Impacts
- Toxic Organic Pollutants Impact
- Photochemistry and Electron Transfer Studies
- Environmental Chemistry and Analysis
- Environmental Toxicology and Ecotoxicology
- Analytical Chemistry and Sensors
- Oxidative Organic Chemistry Reactions
- Lanthanide and Transition Metal Complexes
- Inorganic and Organometallic Chemistry
- Chemical Reactions and Mechanisms
- Dyeing and Modifying Textile Fibers
- Meat and Animal Product Quality
- Water Treatment and Disinfection
- Pesticide and Herbicide Environmental Studies
- Radical Photochemical Reactions
- Molecular Sensors and Ion Detection
- Per- and polyfluoroalkyl substances research
- Synthesis and Biological Evaluation
- Metal complexes synthesis and properties
- Synthesis and properties of polymers
- Atmospheric chemistry and aerosols
- Animal Nutrition and Physiology
Hokkaido Research Organization
2014-2021
Hokkaido University
1995-1997
The effects of complexed metal ions on trans−cis photoisomerization reactions two azobenzene compounds having a crown ether ring, 1a (small ring) and 1b (large were investigated. 2,2'-dimethoxyazobenzene (2) was compared as control. Anomalous increase in the quantum yields observed by complexation with alkaline earth both cases photo irradiation at n→π* π→π* absorption bands, except for some cases. These attributed to interaction between coordinated oxygen atoms 2,2'-position and/or nitrogen...
With the increasing number and volume of chemicals used in modern life, their adverse effects on human health aquatic organisms have increased concerns as well. To formulate appropriate management plans, amounts/volumes emitted these must be regulated. However, no data are available use most chemicals, particularly daily-use such pharmaceuticals personal care products (PPCPs). Herein, we tested eight activated sludge wastewater treatment plants (WWTPs) across Japan, each servicing...
Abstract A fluorescent reagent (1) which has an electron donor and acceptor at each terminal of linear polyether chain was synthesized, the complexation behavior 1 with alkaline earth metal ions investigated. Quenching fluorescence spectrum changes 1H-NMR showed interaction between two moieties in both excited state ground state.
A survey of perfluorinated chemicals (PFCs) deposition during winter was performed at rural areas and hinterlands in Hokkaido (9 points). The depositions were calculated from the concentrations PFCs snow covers. 2.3 ∼ 12 ng/kg. PFBA dominant compound, PFOA PFNA also detected. amounts amount rates 0.38 8.6 μg/m2 5.7 95 ng/m2/day, respectively. They high area along Sea Japan. some among detected higher than those snowfall metropolitan area. result shows not only wet but dry and/or chemical...
A highly sensitive method for the quantification of poly(oxyethylene)octylphenyl ether homologues (OPEs, where OPEn is an OPE homologue with n ethoxy units), which are nonionic surfactants, in environmental water has been developed using solid phase extraction (SPE) and liquid chromatography tandem-mass spectrometry (LC/MS/MS). Methanol was added to samples as a preservative 10% v/v concentration. The were passed through preconditioned SPE cartridge (EDS-1) collect OPEs, then eluted from...
High concentrations of insecticide “fenthion” were detected in the muscles, livers and stomach contents several dead Japanese Cranes (Grus japonensis) found at Memambetsu Town, northeastern Hokkaido. A follow-up survey another five cranes revealed high fenthion pectoral muscle, liver two Shibecha Town Tsurui Village eastern The 0.14 mg/kg-wet 0.13 each 7.9 mg contents, respectively.
液体クロマトグラフィー/タンデム質量分析法（LC/MS/MS）を用いて河川水中の除草剤であるピラクロニル，ダイムロン，ピラゾスルフロンエチル及びベンゾフェナップの高感度の一斉分析法を開発した．対象物質の濃縮には窒素含有メタクリレートとジビニルベンゼンのコンビネーションポリマーを用いた固相抽出法を適用した．LC/MS/MSでの測定では，イオン化にエレクトロスプレーイオン化（ESI）法を用い，極性はPositiveモード，定量はselected reaction monitoring（SRM）法で行った．それぞれの分析法検出下限値（MDL）と定量下限値（MQL）はピラクロニルが0.78 ng L－1及び2.0 L－1，ダイムロンが0.26 L－1及び0.67 L－1，ピラゾスルフロンエチルが0.44 L－1，及び1.1 L－1，ベンゾフェナップが0.45 L－1及び1.1 L－1であった．定量下限値と同程度の濃度の対象物質を添加した際の回収率は，それぞれ99％，100％，110％，54％...
A simultaneous analysis method for poly(oxyethylene)alkyl ethers (AEs) in environmental water was developed using solid phase extraction-liquid chromatography-tandem mass spectrometry (LC/MS/MS). The target substances were those with an alkyl group that had 9–15 carbon atoms and ethylene oxide molar addition of 1–15 (C9-15EO1-15). electrospray ionization technique used the LC/MS/MS measurement. detection limit (MDL) C12EOns, which is main component AEs, ranged from 0.00043 μg/L C12EO8 to...
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