著者

Arai Tsukasa Toda Yuta Kato Kiyotaka Miyamoto Kensuke Hasegawa Tsuyoshi Yamada Kosumi Ueda Junichi Hasegawa Koji Inoue Tsuyoshi Shigemori Hideyuki

出版者

Elsevier

雑誌

Tetrahedron (ISSN:00404020)

巻号頁・発行日

vol.69, no.34, pp.7001-7005, 2013-08

被引用文献数

15 1

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A new sesquiterpene with an α-methylene-γ-lactone moiety, artabolide (1), and three known derivatives 2–4 were isolated from Artemisia absinthium. The structure of 1 was elucidated by 1D and 2D NMR analyses, and the absolute configuration was determined using the modified Mosher's method and X-ray crystal structural analysis. Approximately 2.5 μg/plant treatment of artabolide (1) exhibited ca. 50% inhibition of polar auxin transport in radish hypocotyls, while 2–4 showed no significant inhibitory activity. Therefore, these results support the importance of the α-methylene-γ-lactone moiety for the inhibition of polar auxin transport.

著者

Motojima Hideko Yamada Parida Irie Mitsuteru Ozaki Masuo Shigemori Hideyuki Isoda Hiroko

出版者

Springer Japan

雑誌

Journal of material cycles and waste management (ISSN:14384957)

巻号頁・発行日

vol.14, no.3, pp.169-180, 2012-09

被引用文献数

14

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In this study, the main characteristics and soil amendment effects on the saline–alkali soil of humic acid extracted from solubilized excess sludge (SS-HA) were investigated. The excess sludge was solubilized prior to extraction to improve the humic acid recovery rate. The structural features of SS-HA were characterized by an elemental analysis, Fourier transform infrared spectroscopy, and 1H-nuclear magnetic resonance spectroscopy, and compared with those of HA extracted from non-solubilized excess sludge (ES-HA). The results showed that extraction efficiency of humic acid was enhanced by using solubilization, although structural properties of humic acid extracted from solubilized excess sludge were almost the same as those of ES-HA. To study a utilization method of SS-HA, the soil amendment effects on saline–alkali soil by mixture of SS-HA were investigated with a model soil-column experiment. SS-HA reduced the pH of the saline–alkali soil, and the effect was immediately observed or faster than the case in which only peat is added. Moreover, the cation exchangeable capacity of the saline–alkali soil was enhanced by addition of SS-HA.

著者

Yamada Parida Ono Takako Shigemori Hideyuki Han Junkyu Isoda Hiroko

出版者

Springer Science+Business Media B.V.

雑誌

Cytotechnology (ISSN:09209069)

巻号頁・発行日

vol.64, no.3, pp.349-356, 2012-05

被引用文献数

10

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In this study, the anti-allergy potency of thirteen tannins isolated from the galls on buds of Carpinus tschonoskii (including two tannin derivatives) was investigated. RBL-2H3 (rat basophilic leukemia) cells were incubated with these compounds, and the release of β-hexosaminidase and cytotoxicity were measured. Of the thirteen tannins, tetragalloylglucose (2), pentagalloylglucose (3), casuarictin (4), and casuarinin (9) were the most potent inhibitors, and all the tannins showed no cytotoxic effect after 24 h of incubation. The results obtained suggest that tannins from C. tschonoskii are capable of inhibiting allergic reactions and may be useful for the treatment or prevention of type I allergic diseases.