Search Results - "SENGA, Yukiko"

Anammox and Denitrification in the Intertidal Sediment of the Hypereutrophic Yatsu Tidal Flat, Japan by Senga, Yukiko, Sato, Tsubasa, Kuroiwa, Megumi, Nohara, Seiichi, Suwa, Yuichi

“…An increase in available nitrogen loading in intertidal ecosystems causes eutrophication and macroalgae blooms. Denitrification and anaerobic ammonium…”
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Sensitive Gas Chromatography Detection of Nanomolar Hydroxylamine in Environmental Water by Fe(III) Oxidation by HIKINO, Aiko, SUGAHARA, Shogo, KATO, Toshikuni, SENGA, Yukiko, EGAWA, Michiko, PARK, Ja Yeong, KAMIYA, Hiroshi, TANAKA, Hidekazu, SEIKE, Yasushi

“…Nanomolar concentrations of NH2OH in natural water sources were determined using an Fe3+ oxidation method. A pH of 2.35 – 2.50 was used, which was adjusted by…”
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Influences of green macroalgae blooms on nutrients and sulfide dynamics in hypereutrophic intertidal ecosystems by Senga, Yukiko, Kobayashi, Wataru, Mikawa, Kasumi, Kitazawa, Toshiyuki, Lee, Seongwon, Shiraki, Yohei

“…Blooms of green macroalgae ( Ulva spp.) occur frequently in the hypereutrophic Yatsu tidal flat of eastern Japan. In this study, to elucidate the effects of…”
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Alteration of Dissimilatory Nitrate Reduction Pathways in the Intertidal Sediment during Macroalgae Blooms by Senga, Yukiko, Sato, Tsubasa, Shibaki, Kanae, Kuroiwa, Megumi, Nohara, Seiichi, Suwa, Yuichi

“…To elucidate the effect of macroalgae blooms on dissimilatory nitrate reduction pathways (denitrification, anammox, and DNRA) in sediments of the…”
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Colorimetric Determination of Sulfide in Microsamples by SUGAHARA, Shogo, SUZUKI, Mai, KAMIYA, Hiroshi, YAMAMURO, Masumi, SEMURA, Hitoshi, SENGA, Yukiko, EGAWA, Michiko, SEIKE, Yasushi

“…A method for determination of hydrogen sulfide in microsamples (200 μL) was developed by modifying the methylene blue method. Samples were collected using a…”
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Variation in microbial function through soil depth profiles in the Kushiro Wetland, northeastern Hokkaido, Japan by Senga, Yukiko, Hiroki, Mikiya, Terui, Shigeharu, Nohara, Seiichi

“…To provide new insights into microbial functions in the Kushiro Wetland, Japan, we measured vertical profiles of fluorescein diacetate hydrolysis (total…”
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Determination of Trace Hydrazine in Environmental Water Samples by in situ Solid Phase Extraction by KATO, Toshikuni, SUGAHARA, Shogo, KAJITANI, Takahiro, SENGA, Yukiko, EGAWA, Michiko, KAMIYA, Hiroshi, SEIKE, Yasushi

“…A simple and rapid in situ method for the determination of hydrazine based on the concentration of aldazine compound formed by the reaction of hydrazine with…”
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Sensitive Method for the Oxidation-determination of Trace Hydroxylamine in Environmental Water Using Hypochlorite Followed by Gas Chromatography by KATO, Toshikuni, SUGAHARA, Shogo, MURAKAMI, Makoto, SENGA, Yukiko, EGAWA, Michiko, KAMIYA, Hiroshi, OMATA, Kohji, SEIKE, Yasushi

“…We developed a method for quantifying trace NH2OH in brackish- and sea-water samples. Previously reported methods applicable to fresh water cannot be applied…”
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Characterizing the photochemical degradation of aquatic humic substances from a dystrophic lake using excitation-emission matrix fluorescence spectroscopy and parallel factor analysis by Senga, Yukiko, Moriai, Satoshi, Naruoka, Chika, Nedachi, Ryoma, Terui, Shigeharu

“…Three-dimensional excitation-emission matrix (EEM) fluorescence and parallel factor analysis (PARAFAC) were used to monitor composition and reactivity changes…”
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N2O accumulation in estuarine and coastal sediments : The influence of H2S on dissimilatory nitrate reduction by SENGA, Yukiko, MOCHIDA, Kazuo, FUKUMORI, Ryouko, OKAMOTO, Norihisa, SEIKE, Yasushi

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Soil organic carbon pools in alpine to nival zones along an altitudinal gradient (4400–5300 m) on the Tibetan Plateau by Ohtsuka, Toshiyuki, Hirota, Mitsuru, Zhang, Xianzhou, Shimono, Ayako, Senga, Yukiko, Du, Minguan, Yonemura, Seiichiro, Kawashima, Shigeto, Tang, Yanhong

“…To accurately estimate soil organic carbon (SOC) storage in upper alpine to nival zones on the Tibetan Plateau, we inventoried SOC pools in 0–0.3 m profiles…”
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Influence of hypersaturated dissolved oxygenated water on the elution of hydrogen sulfide and methane from sediment in the dredged area in polyhaline Lake Nakaumi by Sugahara, Shogo, Kamiya, Hiroshi, Suyama, Yusuke, Senga, Yukiko, Ayukawa, Kazuhiro, Okumura, Minoru, Seike, Yasushi

“…Equipment for supplying hypersaturated dissolved oxygen (DO) into water without vertical mixing was installed at a depth of 13.8 m (1 m above the bottom) in…”
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Vertical profiles of DIN, DOC, and microbial activities in the wetland soil of Kushiro Mire, northeastern Japan by Senga, Yukiko, Hiroki, Mikiya, Nakamura, Yosuke, Watarai, Yasushi, Watanabe, Yasunori, Nohara, Seiichi

“…Kushiro Mire is the largest mire in Japan and in 1980 was the first wetland in Japan registered under the Ramsar Convention. Recent reports indicate an…”
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Seasonal and spatial variation in the denitrifying activity in estuarine and lagoonal sediments by Senga, Yukiko, Okumura, Minoru, Seike, Yasushi

“…We have elucidated the seasonal and spatial variation in the potential denitrifying activity in estuarine and coastal lagoonal sediments in Lakes Shinji and…”
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A Simple and Sensitive Method for the Determination of Hydroxylamine in Fresh-Water Samples Using Hypochlorite Followed by Gas Chromatography by SEIKE, Yasushi, FUKUMORI, Ryoko, SENGA, Yukiko, OKA, Hiroki, FUJINAGA, Kaoru, OKUMURA, Minoru

“…A new and simple method for the determination of hydroxylamine in environmental water, such as fresh rivers and lakes using hypochlorite, followed by its gas…”
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Influence of parasitic chytrids on the quantity and quality of algal dissolved organic matter (AOM) by Senga, Yukiko, Yabe, Shiori, Nakamura, Takaki, Kagami, Maiko

“…Algae-derived dissolved organic matter (AOM) is an important nutrient source for heterotrophic bacteria, while AOM such as humic substances pose significant…”
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Exploration of the nitrification process in surface sediment of a hypereutrophic intertidal zone via hydroxylamine monitoring by Natori, Ami, Sanada, Yuuki, Sugahara, Shogo, Nohara, Seiichi, Seike, Yasushi, Senga, Yukiko

“…Hydroxylamine is considered an indicator of nitrification, as it is both produced and consumed during the ammonium (NH4+) oxidation process. In this study, to…”
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Characteristics of CO2, CH4 and N2O emissions from a multi-soil-layering system during wastewater treatment by Masunaga, T.(Shimane Univ., Matsue (Japan). Faculty of Life and Environmental Science), Sato, K, Senga, Y, Seike, Y, Inaishi, T, Kudo, H, Wakatsuki, T

“…In the present study, characterization of greenhouse gas emissions, such as CO2, CH4 and N2O, from a multi-soil-layering (MSL) system during wastewater…”
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Development of absorption spectrophotometry of iron(III) in environmental water and sediments using NEDA and its application to the field by Egawa, Michiko, Sugahara, Shogo, Miwa, Keiya, Park, Ja Yeong, Senga, Yukiko, Seike, Yasushi

“…In this study, we developed a simple method that enables iron(III) in environmental water to be directly determined via spectrophotometry. In water samples,…”
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Sensitive Gas Chromatography Detection of Nanomolar Hydroxylamine in Environmental Water by Fe(III) Oxidation by HIKINO, Aiko, SUGAHARA, Shogo, KATO, Toshikuni, SENGA, Yukiko, EGAWA, Michiko, PARK, Ja Yeong, KAMIYA, Hiroshi, TANAKA, Hidekazu, SEIKE, Yasushi

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