Zobrazeno 1 - 10
of 1 676
pro vyhledávání: '"S. Toyoda"'
Autor:
Yuta Isaji, C. Yoshikawa, N. O. Ogawa, K. Matsumoto, A. Makabe, S. Toyoda, N. F. Ishikawa, H. Ogawa, H. Saito, M. C. Honda, N. Ohkouchi
Publikováno v:
Geochemistry, Geophysics, Geosystems, Vol 23, Iss 4, Pp n/a-n/a (2022)
Abstract Nitrogen isotope analysis of chloropigments provides information on the sources of nitrogenous nutrients assimilated by phytoplankton. The abundant, ubiquitous chlorophyll a records nitrogen isotopic compositions (δ15N) of eukaryotic phytop
Externí odkaz:
https://doaj.org/article/7961a903a80f433cb4a17bd9c340f0f0
Autor:
S. Sugawara, S. Ishidoya, S. Aoki, S. Morimoto, T. Nakazawa, S. Toyoda, Y. Inai, F. Hasebe, C. Ikeda, H. Honda, D. Goto, F. A. Putri
Publikováno v:
Atmospheric Chemistry and Physics, Vol 18, Pp 1819-1833 (2018)
The gravitational separation of major atmospheric components, in addition to the age of air, would provide additional useful information about stratospheric circulation. However, observations of the age of air and gravitational separation are sti
Externí odkaz:
https://doaj.org/article/18d4b8149109427ab34ef1fa96076e10
Autor:
S. Toyoda, N. Yoshida, S. Morimoto, S. Aoki, T. Nakazawa, S. Sugawara, S. Ishidoya, M. Uematsu, Y. Inai, F. Hasebe, C. Ikeda, H. Honda, K. Ishijima
Publikováno v:
Atmospheric Chemistry and Physics, Vol 18, Pp 833-844 (2018)
Vertical profiles of nitrous oxide (N2O) and its isotopocules, isotopically substituted molecules, were obtained over the Equator at altitudes of 16–30 km. Whole air samples were collected using newly developed balloon-borne compact cryogenic sa
Externí odkaz:
https://doaj.org/article/d8a55970317942758e53664a7b55ee6a
Autor:
S. Toyoda, N. Yoshida
Publikováno v:
Atmospheric Measurement Techniques, Vol 9, Iss 5, Pp 2093-2101 (2016)
Nitrous oxide (N2O), an increasingly abundant greenhouse gas in the atmosphere, is the most important stratospheric ozone-depleting gas of this century. Natural abundance ratios of isotopocules of N2O, NNO molecules substituted with stable isotopes o
Externí odkaz:
https://doaj.org/article/c411025e8a56437baae60539b8ab17fd
Publikováno v:
Biogeosciences, Vol 13, Iss 4, Pp 1341-1349 (2016)
Nitrogen isotope ratios (δ15N) of NH4+ in dairy manure compost piles with and without bulking agent (10 % w∕w) were compared to understand the effects of the use of bulking agent on nitrogen conversion during manure composting. The δ15N–NH4+ va
Externí odkaz:
https://doaj.org/article/5b0a522a4e9c48e1a4fc6075d15dcef5
Publikováno v:
Biogeosciences, Vol 11, Iss 10, Pp 2679-2689 (2014)
Nitrous oxide (N2O) is a potent greenhouse gas and produced in denitrification and nitrification by various microorganisms. Site preference (SP) of 15N in N2O, which is defined as the difference in the natural abundance of isotopomers 14N15NO and 15N
Externí odkaz:
https://doaj.org/article/f64d6d1c96014632ad31e52e8cb1f7ab
Publikováno v:
Atmospheric Measurement Techniques, Vol 5, Iss 7, Pp 1601-1609 (2012)
We describe the first high precision real-time analysis of the N2O site-specific isotopic composition at ambient mixing ratios. Our technique is based on mid-infrared quantum cascade laser absorption spectroscopy (QCLAS) combined with an automated pr
Externí odkaz:
https://doaj.org/article/23fe414c661f4480910d9ee582ca8a9e
Autor:
N. Yoshida, Y. Ueno, S. Toyoda, H. G. Kjaergaard, J. A. Schmidt, M. S. Johnson, S. Hattori, S. O. Danielache
Publikováno v:
Atmospheric Chemistry and Physics, Vol 11, Iss 19, Pp 10293-10303 (2011)
We report measurements of the ultraviolet absorption cross sections of OC32S, OC33S, OC34S and O13CS from 195 to 260 nm. The OCS isotopologues were synthesized from isotopically-enriched elemental sulfur by reaction with carbon monoxide. The measured
Externí odkaz:
https://doaj.org/article/73867835dedd4779a91f08607e73fc19
Publikováno v:
Atmospheric Measurement Techniques, Vol 3, Iss 3, Pp 609-618 (2010)
Important information about the biogeochemical cycle of nitrous oxide (N2O) can be obtained by measuring its three main isotopic species, 14N15N16O, 15N14N16O, and 14N14N16O, and the respective site-specific relative isotope ratio differences δ15Nα
Externí odkaz:
https://doaj.org/article/ce56a8b2063c488ebacc5edcdf929cc8
Publikováno v:
British Poultry Science. 64:47-55