Search Results - "Wada, Eitaro"

Ratio of naturally retained 15N to 13C in rat brain regions as a marker of brain function and activity by Kudo, Yoshihisa, Wada, Eitaro

“…15N/ 13C values in the brain regions steadily increased according to postnatal development. The values in specific brain regions were significantly higher in…”
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Spatial variability of CH₄ and N₂O fluxes in alpine ecosystems on the Qinghai–Tibetan Plateau by Kato, Tomomichi, Hirota, Mitsuru, Tang, Yanhong, Wada, Eitaro

“…The intra- and inter-site spatial variability of methane (CH₄) and nitrous oxide (N₂O) fluxes were investigated in three alpine ecosystems at Haibei station on…”
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Stable delta(15)N and delta(13)C isotope ratios in aquatic ecosystems by Wada, Eitaro

“…In the past 20 years, rapid progress in stable isotope (SI) studies has allowed scientists to observe natural ecosystems from entirely new perspectives. This…”
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Biochemical and physiological bases for the use of carbon and nitrogen isotopes in environmental and ecological studies by Ohkouchi, Naohiko, Ogawa, Nanako O, Chikaraishi, Yoshito, Tanaka, Hiroyuki, Wada, Eitaro

“…We review the biochemical and physiological bases of the use of carbon and nitrogen isotopic compositions as an approach for environmental and ecological…”
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Stable carbon isotopic evidence of methane consumption and production in three alpine ecosystems on the Qinghai–Tibetan Plateau by Kato, Tomomichi, Yamada, Keita, Tang, Yanhong, Yoshida, Naohiro, Wada, Eitaro

“…To understand the mechanisms of soil CH4 consumption and production in alpine ecosystems, we for the first time examined the stable carbon isotope ratio of CH4…”
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Isotopomer and isotopologue signatures of N2O produced in alpine ecosystems on the Qinghai-Tibetan Plateau by Kato, Tomomichi, Toyoda, Sakae, Yoshida, Naohiro, Tang, Yanhong, Wada, Eitaro

“…RATIONALE Static‐chamber flux measurements have suggested that one of the world's largest grasslands, the Qinghai‐Tibetan Plateau (QTP), is a potential source…”
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Carbon isotopic signature reveals the geographical trend in methane consumption and production pathways in alpine ecosystems over the Qinghai-Tibetan Plateau by Kato, Tomomichi, Yamada, Keita, Tang, Yanhong, Yoshida, Naohiro, Wada, Eitaro

“…On the Qinghai-Tibetan Plateau, isotopic signatures in soil-atmosphere CH 4 fluxes were investigated in nine grasslands and three wetlands. In the grasslands,…”
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A new method for random mutagenesis by error-prone polymerase chain reaction using heavy water by Minamoto, Toshifumi, Wada, Eitaro, Shimizu, Isamu

“…► We developed a new method of epPCR using heavy water as a solvent instead of normal water (H2O). ► D2O or H218O was used as a solvent of PCR with/without…”
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Stable .DELTA.15N and .DELTA.13C isotope ratios in aquatic ecosystems by WADA, Eitaro

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Sulfur and strontium isotope geochemistry of tributary rivers of Lake Biwa: implications for human impact on the decadal change of lake water quality by Nakano, Takanori, Tayasu, Ichiro, Wada, Eitaro, Igeta, Akitake, Hyodo, Fujio, Miura, Yuuta

“…To study the deterioration of the water quality in Lake Biwa, Japan, over the last 40 years, we measured the concentrations and isotopic ratios of sulfur and…”
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Effect of agriculture on water quality of Lake Biwa tributaries, Japan by Nakano, Takanori, Tayasu, Ichiro, Yamada, Yoshihiro, Hosono, Takahiro, Igeta, Akitake, Hyodo, Fujio, Ando, Atsushi, Saitoh, Yu, Tanaka, Takuya, Wada, Eitaro, Yachi, Shigeo

“…We investigated the effects of natural environments and human activity on Lake Biwa, central Japan. We determined the concentrations of 19 elements and the…”
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Use of Stable Nitrogen Isotope Signatures of Riparian Macrophytes As an Indicator of Anthropogenic N Inputs to River Ecosystems by Kohzu, Ayato, Miyajima, Toshihiro, Tayasu, Ichiro, Yoshimizu, Chikage, Hyodo, Fujio, Matsui, Kiyoshi, Nakano, Takanori, Wada, Eitaro, Fujita, Noboru, Nagata, Toshi

“…Deterioration of aquatic ecosystems resulting from enhanced anthropogenic N loading has become an issue of increasing concern worldwide, and methods are needed…”
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Possible ideas on carbon and nitrogen trophic fractionation of food chains: a new aspect of food-chain stable isotope analysis in Lake Biwa, Lake Baikal, and the Mongolian grasslands by Wada, Eitaro, Ishii, Reiichiro, Aita, Maki Noguchi, Ogawa, Nanako O., Kohzu, Ayato, Hyodo, Fujio, Yamada, Yoshihiro

“…Trophic fractionation of carbon and nitrogen isotopes (Δδ 13 C, Δδ 15 N) was examined using previously complied databases for food chains in Lake Biwa, Lake…”
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Hydrogen isotopic composition of bacterial methane: CO2/H2 reduction and acetate fermentation by Sugimoto, Atsuko, Wada, Eitaro

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Fluctuations of Nitrogen Isotope Ratio of Gobiid Fish (Isaza) Specimens and Sediments in Lake Biwa, Japan, during the 20th Century by Ogawa, Nanako O., Koitabashi, Tadatoshi, Oda, Hirotaka, Nakamura, Toshio, Ohkouchi, Naohiko, Wada, Eitaro

“…Nitrogen isotope ratios (δ15N of sediment and formalin-fixed fish specimens (Isaza fish, Chaenogobius isaza, Tanaka), which had been collected and preserved…”
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Stable Isotope Study on Seasonal Food Web Dynamics in a Eutrophic Lake by Yoshioka, Takahito, Wada, Eitaro, Hayashi, Hidetake

“…Phytoplankton, zooplankton, benthic invertebrates, and pond smelt were collected in a eutrophic lake (Lake Suwa, Japan) from spring to autumn in 1986 and 1987…”
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Variation in nitrogen isotopic composition in the Selenga river watershed, Mongolia by Hyodo, Fujio, Nishikawa, Junko, Kohzu, Ayato, Fujita, Noboru, Saizen, Izuru, Tsogtbaatar, Jamsran, Javzan, Choijilsuren, Enkhtuya, Mangaa, Gantomor, Davaadorj, Amartuvshin, Narantsetsegiin, Ishii, Reiichiro, Wada, Eitaro

“…The stable nitrogen (N) isotope ratio (δ 15 N) has been used to examine the anthropogenic N input (i.e., septic water, wastewater, and manure) to aquatic…”
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Fatty acid composition of aquatic insect larvae Stictochironomus pictulus (Diptera: Chironomidae): evidence of feeding upon methanotrophic bacteria by Kiyashko, Serguei I., Imbs, Andrey B., Narita, Tetsuya, Svetashev, Vassilii I., Wada, Eitaro

“…Larvae of the chironomid Stictochironomus pictulus were collected from Lake Biwa, central Japan. Both the fatty acid composition of the total lipid fraction…”
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Stable Isotope and Radiocarbon Compositions of Methane Emitted from Tropical Rice Paddies and Swamps in Southern Thailand by Nakagawa, Fumiko, Yoshida, Naohiro, Sugimoto, Atsuko, Wada, Eitaro, Yoshioka, Takahito, Ueda, Shingo, Vijarnsorn, Pisoot

“…Stable isotopes (δ 13C,δ D) and radiocarbon were measured in methane bubbles emitted from rice paddies and swamps in southern Thailand. Methane emitted from…”
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Determining the stable isotope ratio of total dissolved inorganic carbon in lake water by GC/C/IIRMS by Miyajima, Toshihiro, Miyajima, Yoshihiro, Hanba, Yuko T., Yoshii, Koichi, Koitabashi, Tadatoshi, Wada, Eitaro

“…A simple, precise method for determining the carbon stable isotope ratio of total dissolved inorganic C (ΣCO2) in freshwater samples is described. Water…”
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