Browsing Gwyddorau Biolegol, Amgylcheddol a Gwledig / Biological, Environmental & Rural Sciences by Author "Asano, Naoki"

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  • Kato, Atsushi; Ikeda, Kyoko; Watson, Alison A.; Haraguchi, M.; Minami, Y.; Asano, Naoki; Nash, Robert J.; Molyneux, R. J.; Gorniak, S. L. (2003-07-11)
    Natural intoxication of livestock by the ingestion of Ipomoea carnea (Convolvulaceae) sometimes occurs in tropical regions of the world. Polyhydroxylated alkaloids were isolated from the leaves, flowers, and seeds of the ...
  • Kato, Atsushi; Kano, E.; Adachi, Isao; Molyneux, R. J.; Watson, Alison A.; Nash, Robert J.; Fleet, George W. J.; Wormald, M. R.; Kizu, Haruhisa; Ikeda, Kyoko; Asano, Naoki (2003-02-07)
    The first polyhydroxylated pyrrolizidine alkaloid with a hydroxymethyl group at C-3 was isolated from pods of Alexa leiopetala (Leguminosae) and designated alexine 1. The Australian legume Castanospermum australe is also ...
  • Asano, Naoki; Yokoyama, Kae; Sakurai, Mio; Ikeda, Kyoko; Kizu, Haruhisa; Kato, Atsushi; Arisawa, Munehisa; Hoke, Dirk; Watson, Alison A.; Nash, Robert J. (2001-07)
    Three dihydroxynortropanes, 2α,7β-dihydroxynortropane, 2α,3β-dihydroxynortropane, and 3α,7β-dihydroxynortropane, were isolated from calystegine-producing plants in the families Convolvulaceae and Solanaceae. 2α,7β-Dihydr ...
  • Kato, Atsushi; Kato, Noriko; Miyauchi, Saori; Minoshima, Yuka; Adachi, Isao; Ikeda, Kyoko; Asano, Naoki; Watson, Alison A.; Nash, Robert J. (2008-03)
    Chromatographic separation of the 50% aqueous EtOH extract of the leaves of the African medicinal tree Baphia nitida resulted in isolation of 10 iminosugars. The plant contained 2R,5R-dihydroxymethyl-3R,4R-dihydroxypyrrolidine ...
  • Kato, Atsushi; Nash, Robert J.; Asano, Naoki; Okamoto, T.; Kizu, Haruhisa; Higuchi, Y.; Adachi, Isao; Goto, H.; Hollinshead, Jackie (2006-08-05)
    Ginger (Zingiber officinale Roscoe) continues to be used as an important cooking spice and herbal medicine around the world. Scientific research has gradually verified the antidiabetic effects of ginger. Especially gingerols, ...
  • Nash, Robert J.; Asano, Naoki; Winters, Ana L.; Yu, C. Y.; Fleet, George W. J.; Butters, T. D.; Ikeda, Kyoko; Dwek, R. A.; Wormald, M. R.; Wang, M. X. (2004-07-29)
    L-DMDP, prepared from D-gulonolactone, is a highly specific inhibitor of a number of plant and mammalian -glucosidases [between 2 and 4 orders of magnitude more potent than the enantiomeric natural product DMDP] but is not ...
  • Yasuda, Kayo; Fan, J. -. Q.; Kizu, Haruhisa; Molyneux, R. J.; Nash, Robert J.; Kato, Atsushi; Asano, Naoki; Fleet, George W. J. (2001-01)
    The extract of bark of Angylocalyx pynaertii (Leguminosae) was found to potently inhibit mammalian α- l-fucosidases. A thorough examination of the extract resulted in the discovery of 15 polyhydroxylated alkaloids, including ...
  • Asano, Naoki; Fleet, George W. J.; Watson, Alison A.; Molyneux, Russell J.; Nash, Robert J. (2001)
    Over one hundred polyhydroxylated alkaloids have been isolated from plants and micro-organisms. These alkaloids can be potent and highly selective glycosidase inhibitors and are arousing great interest as tools to study ...
  • Kato, Atsushi; Lee, Heui S.; Kizu, Haruhisa; Kameda, Yukihiko; Ikeda, Kyoko; Nash, Robert J.; Yasuda, Kayo; Ryu, Kang S.; Asano, Naoki; Yamashita, Toru (2001-08-16)
    New polyhydroxylated alkaloids, (2R,3R,4R)-2-hydroxymethyl-3,4-dihydroxypyrrolidine-N-propionamide from the root bark of Morus alba L., and 4-O-α-d-galactopyranosyl-calystegine B2 and 3β,6β-dihydroxynortropane from the ...
  • Nash, Robert J.; Minami, Y.; Nasu, N.; Asano, Naoki; Kato, Atsushi; Watson, Alison A.; Takebayashi, K.; Adachi, Isao; Sanae, F. (2008)
    Flavonoids are ubiquitous components in vegetables, fruits, tea, and wine. Therefore, they are often consumed in large quantities in our daily diet. Several flavonoids have been shown to have potential as antidiabetic ...

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