Zobrazeno 1 - 10
of 25
pro vyhledávání: '"N. O. Ogawa"'
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. K. E. Goulden, N. Ohkouchi, K. H. Freeman, Y. Chikaraishi, N. O. Ogawa, H. Suga, O. Chadwick, B. Z. Houlton
Publikováno v:
Biogeosciences, Vol 16, Pp 3869-3882 (2019)
Nitrogen (N) availability influences patterns of terrestrial productivity and global carbon cycling, imparting strong but poorly resolved feedbacks on Earth's climate system. Central questions concern the timescale of N cycle response to elevated CO2
Externí odkaz:
https://doaj.org/article/49e4a8717a65468392d03049df63aefd
Publikováno v:
Biogeosciences, Vol 12, Iss 22, Pp 6781-6789 (2015)
Periphytic algae attached to a streambed substrate (periphyton) are an important primary producer in stream ecosystems. We determined the isotopic composition of chlorophyll a in periphyton collected from a stream flowing on limestone bedrock in the
Externí odkaz:
https://doaj.org/article/1eb8d81a8ea344028ed8b2165cfd6340
Autor:
G. Mollenhauer, J. Friedrich, N. Ohkouchi, M. Butzin, N. O. Ogawa, M. Altabet, Y. Kashiyama, S. Kusch
Publikováno v:
Biogeosciences, Vol 7, Iss 12, Pp 4105-4118 (2010)
Chloropigments and their derivative pheopigments preserved in sediments can directly be linked to photosynthesis. Their carbon and nitrogen stable isotopic compositions have been shown to be a good recorder of recent and past surface ocean environmen
Externí odkaz:
https://doaj.org/article/b1bbced04a2b4f59924abf6430b071b2
Publikováno v:
Biogeosciences, Vol 5, Iss 3, Pp 797-816 (2008)
We determined both the nitrogen and carbon isotopic compositions of various vanadyl alkylporphyrins isolated from siliceous marine sediments of the Onnagawa Formation (middle Miocene, northeastern Japan) to investigate the biogeochemistry and ecology
Externí odkaz:
https://doaj.org/article/32ffcd779ea842cb8b59a6d82670c989
Autor:
T. Goto, Hidetaka Nomaki, Katsunori Fujikura, Haruka Shibata, Yoshito Chikaraishi, Naohiko Ohkouchi, Hiroshi Kitazato, N. O. Ogawa, Toshi Nagata
Publikováno v:
Journal of Oceanography. 72:629-639
To estimate polychlorinated biphenyls (PCBs) pollution by the 2011 earthquake and tsunami off the Pacific coast of Tohoku, we report monitoring results of their concentration in deep-sea fish, benthic invertebrates, and sediments collected off Tohoku
Autor:
Yusuke Yokoyama, Masako Yamane, Naohiko Ohkouchi, N. O. Ogawa, Hisami Suga, Naoto F. Ishikawa
Publikováno v:
Biogeosciences. 12:6781-6789
Periphytic algae attached to a streambed substrate (periphyton) are an important primary producer in stream ecosystems. We determined the isotopic composition of chlorophyll a in periphyton collected from a stream flowing on limestone bedrock in the
Autor:
G. Mollenhauer, J. Friedrich, N. Ohkouchi, M. Butzin, N. O. Ogawa, M. Altabet, Y. Kashiyama, S. Kusch
Publikováno v:
Biogeosciences, Vol 7, Iss 12, Pp 4105-4118 (2010)
Chloropigments and their derivative pheopigments preserved in sediments can directly be linked to photosynthesis. Their carbon and nitrogen stable isotopic compositions have been shown to be a good recorder of recent and past surface ocean environmen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=dedup_wf_001::59422b206586bb4455a41899f4ae96fb
https://www.biogeosciences.net/7/4105/2010/
https://www.biogeosciences.net/7/4105/2010/
Autor:
Andrew L. Helton, Ryan M. Lau, Setsuko Wada, Itsuki Sakon, Naohiko Ohkouchi, Yoko Kebukawa, Izumi Endo, Seiji Kimura, N. O. Ogawa, Takashi Onaka
Publikováno v:
Proceedings of the International Astronomical Union. 14:343-344
The unidentified infrared (UIR) bands have been ubiquitously observed in various astrophysical environments and consist of a series of emission features arising from aromatic and/or aliphatic C-C and C-H bonds [1]. Therefore, their carriers are thoug