研究成果

論文(査読あり)

  1. Zou, Y., Y. Hirono, Y. Yanai, S. Hattori, S. Toyoda, and N. Yoshida (in press), Rainwater, soil water, and soil nitrate effects on oxygen isotope ratios of nitrous oxide produced in a green tea (Camellia sinensis) field in Japan, Rapid Commun. Mass Spectrom.
  2. Hattori, S., A. Toyoda, S. Toyoda, S. Ishino, Y. Ueno, and N. Yoshida (2015), Determination of the Sulfur Isotope Ratio in Carbonyl Sulfide Using Gas Chromatography/Isotope Ratio Mass Spectrometry on Fragment Ions 32S+, 33S+, and 34S+, Analytical Chemistry, 87(1), 477-484, doi:10.1021/ac502704d.
  3. Tumendelger, A., S. Toyoda, and N. Yoshida (2014), Isotopic analysis of N2O produced in a conventional wastewater treatment system operated under different aeration conditions, Rapid Communications in Mass Spectrometry, 28(17), 1883-1892, doi:10.1002/rcm.6973.
  4. Yamazaki, T., T. Hozuki, K. Arai, S. Toyoda, K. Koba, T. Fujiwara, and N. Yoshida (2014), Isotopomeric characterization of nitrous oxide produced by reaction of enzymes extracted from nitrifying and denitrifying bacteria, Biogeosciences, 11, 2679-2689, doi:10.5194/bg-11-2679-2014.
  5. Yano, M., S. Toyoda, T. Tokida, K. Hayashi, T. Hasegawa, A. Makabe, K. Koba, and N. Yoshida (2014), Isotopomer analysis of production, consumption and soil-to-atmosphere emission processes of N2O at the beginning of paddy field irrigation, Soil Biology and Biochemistry, 70, 66-78, doi:10.1016/j.soilbio.2013.11.026.
  6. Yoshikawa, C., E. Hayashi, K. Yamada, O. Yoshida, S. Toyoda, and N. Yoshida (2014), Methane sources and sinks in the subtropical South Pacific along 17°S as traced by stable isotope ratios, Chemical Geology, 382(0), 24-31, doi:10.1016/j.chemgeo.2014.05.024.
  7. Zou, Y., Y. Hirono, Y. Yanai, S. Hattori, S. Toyoda, and N. Yoshida (2014), Isotopomer analysis of nitrous oxide accumulated in soil cultivated with tea (Camellia sinensis) in Shizuoka, central Japan, Soil Biology and Biochemistry, 77(0), 276-291, doi:http://dx.doi.org/10.1016/j.soilbio.2014.06.016.
  8. Mohn, J., et al. (2014), Interlaboratory assessment of nitrous oxide isotopomer analysis by isotope ratio mass spectrometry and laser spectroscopy: current status and perspectives, Rapid Communications in Mass Spectrometry, 28(18), 1995-2007, doi:10.1002/rcm.6982.
  9. Ishii, S., Y. Song, L. Rathnayake, A. Tumendelger, H. Satoh, S. Toyoda, N. Yoshida, and S. Okabe (2014), Identification of key nitrous oxide production pathways in aerobic partial nitrifying granules, Environmental Microbiology, 16(10), 3168-3180, doi:10.1111/1462-2920.12458.
  10. Toyoda, S., N. Kuroki, N. Yoshida, K. Ishijima, Y. Tohjima, and T. Machida (2013), Decadal time series of tropospheric abundance of N2O isotopomers and isotopologues in the Northern Hemisphere obtained by the long-term observation at Hateruma Island, Japan, Journal of Geophysical Research, 118, 3369-3381, doi:10.1002/jgrd.50221.
  11. Fujii, A., S. Toyoda, O. Yoshida, S. Watanabe, K. i. Sasaki, and N. Yoshida (2013), Distribution of nitrous oxide dissolved in water masses in the eastern subtropical North Pacific and its origin inferred from isotopomer analysis, Journal of Oceanography, 69(2), 147-157, doi:10.1007/s10872-012-0162-4.
  12. Kato, T., S. Toyoda, N. Yoshida, Y. Tang, and E. Wada (2013), Isotopomer and isotopologue signatures of N2O produced in alpine ecosystems on the Qinghai-Tibetan Plateau, Rapid Commun. Mass Spectrom., 27, 1517-1526, doi:10.1002/rcm.6595.
  13. Koba, K., et al. (2012), The 15N natural abundance of the N lost from an N-saturated subtropical forest in southern China, Journal of Geophysical Research, 117, G02015, doi:10.1029/2010JG001615.
  14. Maeda, K., D. Hanajima, R. Morikawa, S. Toyoda, N. Yoshida, and T. Osada (2013), Mitigation of greenhouse gas emission from the cattle manure composting process by use of a bulking agent, Soil Science and Plant Nutrition, doi:10.1080/00380768.2012.733868.
  15. Maeda, K., S. Toyoda, D. Hanajima, and N. Yoshida (2013), Denitrifiers in the surface zone are primarily responsible for the nitrous oxide emission of dairy manure compost, Journal of Hazardous Materials, 248-249, doi:10.1016/j.jhazmat.2013.01.041.
  16. Mukotaka, A., S. Toyoda, N. Yoshida, and R. Well (2013), On-line triple oxygen isotope analysis of nitrous oxide using decomposition by microwave discharge, Rapid Commun. Mass Spectrom., 27(21), 2391-2398, doi:10.1002/rcm.6698.
  17. Priyadarshi, A., et al. (2013), Detection of radioactive 35S at Fukushima and other Japanese sites, J. Geophys. Res., 118, 1020-1027, doi:10.1029/2012JD018485.
  18. Rathnayake, R. M. L. D., Y. Song, A. Tumendelger, M. Oshiki, S. Ishii, H. Satoh, S. Toyoda, N. Yoshida, and S. Okabe (2013), Source identification of nitrous oxide on autotrophic partial nitrification in a granular sludge reactor, Water Research, 47(19), 7078-7086, doi:http://dx.doi.org/10.1016/j.watres.2013.07.055.
  19. Mohn, J., B. Tuzson, A. Manninen, N. Yoshida, S. Toyoda, W. A. Brand, and L. Emmenegger (2012), Site selective real-time measurements of atmospheric N2O isotopomers by laser spectroscopy, Atmos. Meas. Tech., 5, 1601-1609, doi:10.5194/amt-5-1601-2012.
  20. Sasaki, Y., K. Koba, M. Yamamoto, A. Makabe, Y. Ueno, M. Nakagawa, S. Toyoda, N. Yoshida, and M. Yoh (2011), Biogeochemistry of nitrous oxide in Lake Kizaki, Japan, elucidated by nitrous oxide isotopomer analysis, Journal of Geophysical Research 116(G04030), doi:10.1029/2010JG001589.
  21. Hattori, S., Danielache, S. O., Johnson, M. S., Schmidt, J. A., Kjaergaard, H. G., Toyoda, S., Ueno, Y., and Yoshida, N.(2011), Ultraviolet absorption cross sections of carbonyl sulfide isotopologues OC32S, OC33S, OC34S and O13CS: isotopic fractionation in photolysis and atmospheric implications, Atmos. Chem. Phys., 11, 10293-10303, doi:10.5194/acp-11-10293-2011.
  22. Toyoda, S., et al. (2011), Characterization and production and consumption processes of N2O emitted from temperate agricultural soils determined via isotopomer ratio analysis, Global Biogeochem. Cycles, 25, GB2008, doi:10.1029/2009GB003769.
  23. Toyoda, S., Y. Suzuki, S. Hattori, K. Yamada, A. Fujii, N. Yoshida, R. Kouno, K. Murayama, and H. Shiomi (2011), Isotopomer analysis of production and consumption mechanisms of N2O and CH4 in an advanced wastewater treatment system, Environmental Science and Technology, 45, 917-922, doi:10.1021/es102985u.
  24. Maeda, K., D. Hanajima, S. Toyoda, N. Yoshida, R. Morioka, and T. Osada (2011), Microbiology of nitrogen cycle in animal manure compost, Microbial Biotechnology, 4(6), 700-709, doi:10.1111/j.1751-7915.2010.00236.x.
  25. Tobari, Y., K. Koba, K. Fukushima, N. Tokuchi, N. Ohte, R. Tateno, S. Toyoda, T. Yoshioka, and N. Yoshida (2010), Contribution of atmospheric nitrate to stream-water nitrate in Japanese coniferous forests revealed by the oxygen isotope ratio of nitrate, Rapid Commun. Mass Spectrom., 24, 1-6.
  26. Mohn, J., C. Guggenheim, B. Tuzson, M. K. Vollmer, S. Toyoda, N. Yoshida, and L. Emmenegger (2010), A liquid nitrogen-free preconcentration unit for measurements of ambient N2O isotopomers by QCLAS, Atmospheric Measurement Techniques, 3, 609-618, doi:10.5194/amt-3-609-2010.
  27. Maeda, K., S. Toyoda, R. Shimojima, T. Osada, D. Hanajima, R. Morioka, and N. Yoshida (2010), The source of nitrous oxide emission from cattle manure composting process revealed by isotopomer analysis of and amoA abundance in beta-proteobacterial ammonia-oxidizing bacteria., Appl. Environ. Microbiol., 76(5), 1555-1562.
  28. Toyoda, S., H. Iwai, K. Koba, and N. Yoshida (2009), Isotopomeric analysis of N2O dissolved in a river in the Tokyo metropolitan area, Rapid Communications in Mass Spectrometry, 23, 809-821.
  29. Koba, K., et al. (2009), Biogeochemistry of nitrous oxide in groundwater in a forested ecosystem elucidated by nitrous oxide isotopomer measurements, Geochimica et Cosmochimica Acta, 73, 3115-3133.
  30. Toyoda, S., S. Yamamoto, S. Arai, H. Nara, N. Yoshida, K. Kashiwakura, and K. Akiyama (2008), Isotopomeric characterization of N2O produced, consumed, and emitted by automobiles, Rapid Commun. Mass Spectrom., 22(5), 603-612.
  31. Yamagishi, H., M. B. Westley, B. N. Popp, S. Toyoda, N. Yoshida, S. Watanabe, K. Koba, and Y. Yamanaka (2007), Role of nitrification and denitrification on the nitrous oxide cycle in the eastern tropical North Pacific and Gulf of California, J. Geophys. Res., 112, G02015.
  32. Nara, H., S. Toyoda, and N. Yoshida (2007), Measurements of stable carbon isotopic composition of ethane and propane over the western North Pacific and eastern Indian Ocean: A usefule indicator of atmospheric transport process, Journal of Atmospheric Chemistry, 56(3), 293-314.
  33. Yamagishi, H., N. Yoshida, S. Toyoda, B. N. Popp, M. B. Westely, and S. Watanabe (2005), Contributions of denitrification and mixing on the distribution of nitrous oxide in the North Pacific, Geophys. Res. Lett., 32, L04603.
  34. Well, R., H. Flessa, F. Jaradat, S. Toyoda, and N. Yoshida (2005), Measurement of isotopomer signatures of N2O in groundwater, Journal of Geophysical Research-Biogeosciences, 110(G2), G02006.
  35. Toyoda, S., H. Mutobe, H. Yamagishi, N. Yoshida, and Y. Tanji (2005), Fractionation of N2O isotopomers during production by denitrifier, Soil Biol. Biochem., 37(8), 1535-1545.
  36. Toyoda, S., et al. (2004), Temporal and latitudinal distributions of stratospheric N2O isotopomers, J. Geophys. Res., 109, D08308.
  37. Bol, R., S. Toyoda, S. Yamulki, J. M. B. Hawkins, L. M. Cardenas, and N. Yoshida (2003), Dual isotope and isotopomer ratios of N2O emitted from a temperate grassland soil after fertiliser application, Rapid Commun. Mass Spectrom., 17, 2550-2556.
  38. Uehara, K., K. Yamamoto, T. Kikugawa, S. Toyoda, K. Tsuji, and N. Yoshida (2002), Precise isotope abundance ratio measurement of nitrous oxide using diode lasers, Sens. Actuators, B90, 250-255.
  39. Toyoda, S., N. Yoshida, T. Miwa, Y. Matsui, H. Yamagishi, U. Tsunogai, Y. Nojiri, and N. Tsurushima (2002), Production mechanism and global budget of N2O inferred from its isotopomers in the western North Pacific, Geophys. Res. Lett., 29 No.3, 7-1-7-4.
  40. Sowers, T., A. Rodebaugh, N. Yoshida, and S. Toyoda (2002), Extending records of the isotopic composition of the atmospheric N2O back to 1800 A.D. from air trapped in snow at the South Pole and the Greenland Ice Sheet Project II ice core, Global Biogeochem. Cycles, 16(4), 1129.
  41. Popp, B. N., et al. (2002), Nitrogen and oxygen isotopomeric constraints on the origins and sea-to-air flux of N2O in the oligotrophic subtropical North Pacific gyre, Global Biogeochem. Cycles, 16(4), 1064.
  42. Nakazawa, et al. (2002), Variations of stratospheric trace gases measured using a balloon-borne cryogenic sampler, Adv. Space Res., 30(5), 1349-1357.
  43. Yamulki, S., S. Toyoda, N. Yoshida, E. Veldkamp, B. Grant, and R. Bol (2001), Diurnal fluxes and the isotopomer ratios of N2O in a temperate grassland following urine amendment, Rapid Commun. Mass Spectrom., 15, 1263-1269.
  44. Toyoda, S., N. Yoshida, T. Urabe, S. Aoki, T. Nakazawa, S. Sugawara, and H. Honda (2001), Fractionation of N2O isotopomers in the stratosphere, J. Geophys. Res., 106, 7515-7522.
  45. Yoshida, N., and S. Toyoda (2000), Constraining the atmospheric N2O budget from intramolecular site preference in N2O isotopomers, Nature, 405, 330-334.
  46. Toyoda, S., and N. Yoshida (1999), Determination of nitrogen isotopomers of nitrous oxide on a modified isotope ratio mass spectrometer, Anal. Chem., 71, 4711-4718.
  47. Toyoda, S., T. Tominaga, and Y. Makide (1998), Cryogen-free automated gas chromatograph system for monitoring of halocarbons in the atmosphere at background concentration levels, Analytical Sciences, 14, 917-923.
  48. Toyoda, S., T. Tominaga, and Y. Makide (1997), Monitoring of Atmospheric Concentration of Chlorodifluoromethane (HCFC-22) by Automated GC/O2-doped-ECD, Chem. Lett., 1997, 95-96.
  49. Takahashi, Y., Y. Minai, Y. Meguro, S. Toyoda, and T. Tominaga (1994), Ionic strength and pH dependence of binding constants of Am (III) and Eu (III) -humates, Journal of Radioanalytical and Nuclear Chemistry Letters, 186(2), 129-141.

論文(査読なし)

  1. 豊田 栄、吉田 尚弘、占部 太一郎、青木 周司、中澤 高清、菅原 敏、本田 秀之、「三陸上空の成層圏におけるN2Oアイソトポマーの高度分布」、宇宙科学研究所報告、41, 73-80 (2001).
  2. Sugawara, S., S. Toyoda, S. Ishidoya, S. Morimoto, S. Aoki, T. Nakazawa, and T. Yamanouchi (2010), Stratospheric Greenhouse Gas Observation Using a Balloon-borne Cryogenic Sampler at Syowa Station, Antarctica, Nankyoku shiryo (Antarctic Record), written in Japanese with English abstract, 54(Special Issue), 410-425.

著書・解説・総説

  1. Toyoda, S., K. Koba, and N. Yoshida (in press), Isotopocule analysis of biologically produced nitrous oxide in various environments, Mass Spectrometry Reviews.
  2. 豊田 栄, 生元素安定同位体比分析のための試料前処理方法, ぶんせき, 2013(11), 648-654 (2013).
  3. 向高 新, 豊田 栄, 吉田 尚弘, マイクロ波放電分解法による硝酸塩の酸素同位体測定法の開発, 化学工業, 2013(7) , 539-543 (2013)
  4. 豊田 栄, アイソトポマーから地球環境をさぐる, 化学と教育, 53(12), 684-685 (2005).
  5. S. Toyoda and N. Yoshida, Site-specific nitrogen isotope analysis in N2O by mass spectrometry, in Handbook of stable isotope analytical techniques, Volume-I, P.A. de Groot (ed.), Elsevier, 390-399 (2004).
  6. O. Abe, S. Toyoda, K. Yamada, N. Kurita, S. Hashimoto, R. Uemura, and N. Yoshida, Methods of sampling, measurements and data acquisition for hydrogen and oxygen isotopic composition in rainwater, in Hydrogen and oxygen isotopes in hydrology (The textbook for the eleventh IHP training course in 2001), N. Yoshida (ed.), Hydrospheric Atmospheric Research Center, Nagoya University, United Nations Educational Scientific and Cultural Organization, 237-264 (2002).
  7. 吉田 尚弘 編・訳、角皆 潤、豊田 栄、河村 圭美 共訳、「地球環境の未来をさぐる――水・物質サイクルの変動と変化」、丸善ポップサイエンス (1998).