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Chikako Masuoka
Researcher at Kyushu Tokai University
Publications - 38
Citations - 950
Chikako Masuoka is an academic researcher from Kyushu Tokai University. The author has contributed to research in topics: Iridoid Glucosides & Phenylethanoid. The author has an hindex of 17, co-authored 38 publications receiving 869 citations. Previous affiliations of Chikako Masuoka include Sojo University & Tokai University.
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Journal ArticleDOI
Lignan derivatives and a norditerpene from the seeds of Vitex negundo
Masateru Ono,Yoichiro Nishida,Chikako Masuoka,Jian-Chen Li,Masafumi Okawa,Tsuyoshi Ikeda,Toshihiro Nohara +6 more
TL;DR: Compounds 1, 2, and 4-7 showed higher radical-scavenging effect on the stable free radical, 1,1-diphenyl-2-picrylhydrazyl, than L-cysteine, and showed stronger antioxidative activity than alpha-tocopherol using the ferric thiocyanate method.
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Evaluation of the Anti-oxidative Effect (in vitro) of Tea Polyphenols
Fumio Hashimoto,Masateru Ono,Chikako Masuoka,Yasuyuki Ito,Yusuke Sakata,Keiichi Shimizu,Gen-ichiro Nonaka,Itsuo Nishioka,Toshihiro Nohara +8 more
TL;DR: 1,4,6-tri-O-galloyl-β-D-glucose (hydrolyzable tannin) showed the highest anti-oxidative activity against lipid peroxidation, even stronger than that of 3-tert.-butyl-4-hydroxyanisole (BHA).
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Diterpenes from the fruits of Vitex rotundifolia.
TL;DR: Eight new labdane-type diterpenes were isolated from the fruit of Vitex rotundifolia and exhibited a stronger antioxidative activity than the standard antioxidant, 3-tert-butyl-4-hydroxyanisole (BHA), using a ferric thiocyanate method.
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Two new steroid glycosides and a new sesquiterpenoid glycoside from the underground parts of Trillium kamtschaticum
Masateru Ono,Chika Takamura,Fumie Sugita,Chikako Masuoka,Hitoshi Yoshimitsu,Tsuyoshi Ikeda,Toshihiro Nohara +6 more
TL;DR: Two new steroid glycosides and a new sesquiterpenoid glycoside named trikamsesuquiside A and B were isolated from the underground parts of Trillium kamtschaticum PALL and showed almost the same radical-scavenging effect on 1,1-diphenyl-2-picrylhydrazyl as that of alpha-tocopherol.
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DPPH radical-scavenging effect on some constituents from the aerial parts of Lippia triphylla.
Masateru Ono,Eriko Oda,Takemi Tanaka,Yoshihiko Iida,Toru Yamasaki,Chikako Masuoka,Tsuyoshi Ikeda,Toshihiro Nohara +7 more
TL;DR: From the aerial parts of this plant, 25 known compounds—3 phenylpropanoid glucosides, 7 flavonoids, 5 phenylethanoid glycosides, 5 lignans, 2 sesquiterpenoids, and 3 triterpenoid—were isolated, and their chemical structures were elucidated on the basis of physical and spectral data.