研究者詳細 - 清田　洋正

論文 - 清田　洋正

分割表示 235 件中 21 - 40 件目／全件表示 >>

Dehalogenation and Dissipation of Chloroaromatic Compounds by Nocardioides sp. PD653: Characterization of the Substrate Specificity 査読

Koji Ito, Kazuhiro Takagi, Ryota Kataoka, Hiromasa Kiyota, Akio Iwasaki

J. Pestic. Sci. 44 ( 3 ) 171 - 176 2019年8月

Mechanism-based tuning of insect 3,4-dihydroxyphenylacetaldehyde synthase for synthetic bioproduction of benzylisoquinoline alkaloids 査読国際誌

Christopher John, Vavricka Jr, Takanobu Yoshida, Yuki Kuriya, Shunsuke Takahashi, Teppei Ogawa, Fumie Ono, Kazuko Agari, Hiromasa Kiyota, Jianyong Li, Jun Ishii, Kenji Tsuge, Hiromichi Minami, Michihiro Araki, Tomohisa Hasunuma, Akihiko Kondo

Nature Communications 10 ( 1 ) 2015 - 2015 2019年5月

Synthetic Studies of Salicylaldehyde-type Phytotoxins Isolated from Rice Blast Fungus

Hiromasa Kiyota

Journal of Synthetic Organic Chemistry, Japan 77 ( 2 ) 173 - 180 2019年2月

Chemo-enzymatic synthesis of p-nitrophenyl β-D-galactofuranosyl disaccharides from Aspergillus sp. fungal-type galactomannan. 査読国際誌

Ota R, Okamoto Y, Vavricka CJ, Oka T, Matsunaga E, Takegawa K, Kiyota H, Izumi M

Carbohydr Res. 473 99 - 103 2019年2月

抗リーシュマニア原虫活性物質Ancistrocladinium AとBの合成研究

清田洋正、齋藤昭人、高井桃子、桑原重文

岡山大農学報 108 1 - 4 2019年2月

Analytical Method to Evaluate Gizzerosine in Fishmeal After Diazonium Derivatization Using High-Performance Liquid Chromatography 査読

Food Anal. Methods 12 ( 2 ) 331 - 337 2019年2月

現代のアロマセラピーで使用する乳香とティートリー精油の身体・心への影響について

浅田昌古、酒井貴志、清田洋正

岡山大農学報 107 1 - 3 2018年2月

Multigram-Scale and Column Chromatography-Free Synthesis of?L-Azetidine-2-carboxylic Acid for the Synthesis of Nicotianamine and Its Derivatives 査読

Tomohiro Takaishi, Kyosuke Wakisaka, Christopher J Vavricka, Hiromasa Kiyota, and Minoru Izumi*

Heterocycles 96 ( 12 ) 2126 - 2134 2018年1月

Synthesis of Halogenated-4-nitrophenyl 2-Deoxy-2-halogenopyranosides via N-Halogenosuccinimide Activated Glucal 査読

Chieri Inoue, Yumi Okamoto, Christopher J. Vavricka, Hiromasa Kiyota, Minoru Izumi

Nat. Prod. Commun. 13 ( 1 ) 85 - 87 2018年1月

Chemical Constituents and Their Activities from Saussurea Genus

Ting Zhao, Shao-Jing Li, Zhao-Xin Zhang, Man-Li Zhang, Qing-Wen Shi, Yu-Cheng Gu, Mei Dong, Hiromasa Kiyota

Heterocyclic Communications 23 ( 5 ) 331 - 358 2017年10月

Xylomexicanins I and J: Limonoids with Unusual B/C Rings from Xylocarpus granatum

Journal of Natural Products 80 ( 9 ) 2547 - 2550 2017年9月

Chemical and Pharmacological Research of the Plants from Genus Ajuga

Xia Qing, Hui-Min Yan, Zhi-Yu Ni, Christopher J. Vavricka, Man-Li Zhang, Qing-Wen Shi, Yu-Cheng Gu, Hiromasa Kiyota

Heterocyclic Communications 23 ( 4 ) 245 - 268 2017年8月

Synthesis of Sulfo-Sialic Acid Analogues: Potent Neuraminidase inhibitors in Regards to Anomeric Functionality

Christopher J. Vavricka, Chiaki Muto, Tomohisa Hasunuma, Yoshinobu Kimura, Michihiro Araki, Yan Wu, George F. Gao, Hiroshi Ohrui, Minoru Izumi, Hiromasa Kiyota

Scientific Reports 7 ( 1 ) 8239 2017年8月

Product Selectivity of Esterification of L-Aspartic Acid and L-Glutamic Acid Using Chlorotrimethylsilane

Tomohiro Takaishi, Minoru Izumi, Ryo Ota, Chieri Inoue, Hiromasa Kiyota, Koichi Fukase

NATURAL PRODUCT COMMUNICATIONS 12 ( 2 ) 247 - 249 2017年2月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：NATURAL PRODUCTS INC

TMSCl works as an acid catalyst precursor for selective esterification of L-aspartic and L-glutamic acids in the presence of primary, secondary and tertiary alcohols. Although excess TMSCl was required for the completion of esterification, the resulting alkyl TMS ether could be azeotropically removed by simple evaporation with alcohol.

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Study on the Metabolites of Isoalantolactone in vivo and in vitro by Ultra Performance Liquid Chromatography Combined with Triple TOF Mass Spectrometry

Dong-Gui Yao, Yu-Fang, Wang, Chang-Hong Huo, Yi-Bing Wu, Man-Li Zhang, Li-Geng Li, Qing-Wen Shi, Hiromasa Kiyota, Xiao-Wei Shi

Food Chemistry 214 328 - 338 2017年1月

酵素触媒反応を鍵とする光学活性な香気物質両鏡像体の合成と香気評価

清田洋正

岡山大農学報 106 33 - 38 2017年

Identification of in vitro and in vivo metabolites of alantolactone by UPLC-TOF-MS/MS

Donggui Yao, Zhe Li, Changhong Huo, Yufang Wang, Yibing Wu, Manli Zhang, Ligeng Li, Qingwen Shi, Hiromasa Kiyota, Xiaowei Shi

JOURNAL OF CHROMATOGRAPHY B-ANALYTICAL TECHNOLOGIES IN THE BIOMEDICAL AND LIFE SCIENCES 1033 250 - 260 2016年10月

記述言語：英語掲載種別：研究論文（学術雑誌）出版者・発行元：ELSEVIER SCIENCE BV

Alantolactone (AL), an active sesquiterpene originating from Inula helenium, is a potential anticancer and anti-inflammatory agent. However so far, studies on AL metabolism have not been reported. In the present study, we have investigated for the first time the in vivo and in vitro metabolites of AL using ultra performance liquid chromatography combined with time of flight mass spectrometry (UPLC-TOFMS/MS). A unique on-line information-dependent acquisition (IDA) method multiple mass defect filter (MMDF) combined with dynamic background subtraction (DBS) was applied to trace all of the probable metabolites of AL. Five MMDF templates were set according to the core structure of AL and the general metabolite biotransformation patterns, and other five sulfur-containing dimer filter templates were first established on the basis of structural elucidation of AL metabolites obtained from rat intestinal bacteria biotransformation. As a result, 44 metabolites were characterized: 41 metabolites from rat urine, bile and feces after oral administration of AL, and 13 metabolites from AL biotransformation by rat intestinal bacteria. Particularly, 26 metabolites were identified as novel sulfur-containing products. The results indicated that addition of double bond at A(11,13) and oxidization were the main metabolic reactions of AL. A new metabolism pathway to produce addition products of H2S to AL and further generate a series of sulfur-containing dimers of AL was revealed. This study significantly enriched our knowledge about AL metabolism, which will lead to a better understanding of the safety and efficacy of AL. At the same time, the established methodology can be widely applied for the structural determination of the metabolites of other sesquiterpene containing alpha-methylene-gamma-lactone moiety. (C) 2016 Elsevier B.V. All rights reserved.

DOI： 10.1016/j.jchromb.2016.08.034

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Isolation of Endosulfan Sulfate-degrading Rhodococcus koreensis strain S1-1 from Endosulfan Contaminated Soil and Identification of a Novel Metabolite, Endosulfan Diol Monosulfate

Koji Ito, Fujimasa Kawashima, Kazuhiro Takagi, Ryota Kataoka, Masaaki Kotake, Hiromasa Kiyota, Kenichi Yamazaki, Futa Sakakibara, Sanae Okada

Biochemical and Biophysical Research Communications 473 ( 4 ) 1094 - 1099 2016年5月

Inhibitory Effect of 13 Taxane Diterpenoids from Chinese yew (Taxus chinensis var. mairei) on the Proliferation of HeLa Cervical Cancer Cells

Dong-Gui Yao, Yu-Fang, Wang, Chang-Hong Huo, Yi-Bing Wu, Man-Li Zhang, Li-Geng Li, Qing-Wen Shi, Hiromasa Kiyota, Xiao-Wei Shi

Bioscience, Biotechnology, and Biochemistry 80 ( 10 ) 1883 - 1886 2016年

12T061A and 12T061C, Two New Julichrome Family Compounds, as Radical Scavengers from Streptomyces sp.

Toshikazu Komoda, Naoko, Saeki, Yoshitaka Koseki, Hiromasa Kiyota

The Journal of General and Applied Microbiology 62 ( 1 ) 1 - 6 2016年

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