A5106122336- Chemical synthesis and alkaloids
- Insect Pheromone Research and Control
- Synthetic Organic Chemistry Methods
- Molecular spectroscopy and chirality
- Insect and Pesticide Research
- Plant and animal studies
- Marine Sponges and Natural Products
- Analytical Chemistry and Chromatography
- Asymmetric Synthesis and Catalysis
- Microbial Natural Products and Biosynthesis
- Traditional and Medicinal Uses of Annonaceae
- Forest Insect Ecology and Management
- Carbohydrate Chemistry and Synthesis
- Insect and Arachnid Ecology and Behavior
- Insect-Plant Interactions and Control
- Natural product bioactivities and synthesis
- Biological Activity of Diterpenoids and Biflavonoids
- Plant biochemistry and biosynthesis
- Phytochemistry and Biological Activities
- Insect Pest Control Strategies
- Axial and Atropisomeric Chirality Synthesis
- Cancer Treatment and Pharmacology
- Research on scale insects
- Chemical Synthesis and Analysis
- Oxidative Organic Chemistry Reactions
Japan Lifeline (Japan)
2022-2023
Tokushima University
2000-2023
Kumamoto University
2021
The University of Tokyo
2004-2020
Materials Research Center
2008-2017
Tokyo University of Agriculture
1991-2016
Tokyo University of Science
1996-2016
Bunkyo University
1991-2016
Toyoda Gosei (Japan)
2007-2015
RIKEN
2005-2014
Seeing the light: Tuning electron-donating ability of π-conjugated framework bithiophene has resulted in intense solid-state emissions with maxima ranging over a wide visible region (see picture). Even deep-red fluorescence large Stokes shift close to 200 nm, arising from intramolecular charge-transfer (CT) transition twisted π boron center, can be obtained.
Brassinolide, a new plant growth-promoting steroid lactone, and its synthetic analog, homobrassinolide, showed strong activity in stimulating the lamina inclination of rice plants at very low concentrations 0.0005 0.005 μg/ml, respectively, whereas IAA only weak effect on 50 μg/ml. Thus, test is useful as highly sensitive bioassay for brassinolide related compounds.
The flight response of both sexes Dendroctonus brevicomis to the mixture myrcene, racemic frontalin, and (1 R ,5 S ,7 )-(+)-exo-brevicomin )-(-)-frontalin exo-brevicomin was significantly greater than same mixtures in which antipodes were substituted. these two also ternary (MFE). walking (+)-exo-brevicomin not different from MFE. Substitution antipode lowered when compared that When evaporated with ponderosa pine turpentine, (-)-frontalin active field while its not.
In laboratory and field bioassays, Gnathotrichus sulcatus responded to sulcatol (6-methyl-5-hepten-2-ol) only when both enantiomers were present. Response was greater racemic than a mixture (65 : 35) of S-(+) R-(-) enantiomers, the naturally occurring isomeric ratio. Enantiomer-specific active sites on receptor proteins in same or different cells are implicated.
ADVERTISEMENT RETURN TO ISSUEPREVArticleNEXTStructures of supported vanadium oxide catalysts. 1. Vanadium(V) oxide/titanium dioxide (anatase), vanadium(V) (rutile), and (mixture anatase with rutile)Makoto Inomata, Kenji Mori, Akira Miyamoto, Toshiaki Ui, Yuichi MurakamiCite this: J. Phys. Chem. 1983, 87, 5, 754–761Publication Date (Print):March 1, 1983Publication History Published online1 May 2002Published inissue 1 March...
Farbenfroh: Durch Einstellen der Elektronendonoreigenschaften des π-konjugierten Bithiophen-Gerüsts wurden intensiv emittierende Festkörper erhalten, deren Maxima einen großen Teil sichtbaren Spektrums abdecken (siehe Bild). Eine tiefrote Fluoreszenz mit großer Stokes-Verschiebung um 200 nm resultiert aus einem intramolekularen Charge-Transfer(CT)-Übergang vom verdrillten Bithiophen auf das Borzentrum.
Unambiguous identification of isomeric lipids by mass spectrometry represents a significant analytical challenge in contemporary lipidomics. Herein, the combination collision-induced dissociation (CID) with ozone-induced (OzID) on an ion-trap spectrometer is applied to triacylglycerol (TG) isomers that vary only substitution pattern fatty acyl (FA) chains esterified glycerol backbone. Isolated product ions attributed loss single FA arising from CID [TG + Na](+) react rapidly ozone within ion...
Gustatory pheromones play an essential role in shaping the behavior of many organisms. However, little is known about processing taste higher order brain centers. Here, we describe a male-specific gustatory circuit Drosophila that underlies detection anti-aphrodisiac pheromone (3R,11Z,19Z)-3-acetoxy-11,19-octacosadien-1-ol (CH503). Using behavioral analysis, genetic manipulation, and live calcium imaging, show Gr68a-expressing neurons on forelegs male flies exhibit sexually dimorphic...
Summary We have isolated and characterized a cDNA encoding novel diterpene cyclase, OsDTC1, from suspension‐cultured rice cells treated with chitin elicitor. OsDTC1 functions as ent ‐cassa‐12,15‐diene synthase, which is considered to play key role in the biosynthesis of (−)‐phytocassanes recently diterpenoid phytoalexins. The expression mRNA was also confirmed ultraviolet (UV)‐irradiated leaves. In addition, we identified ‐cassa‐12,15‐diene, putative hydrocarbon precursor (−)‐phytocassanes,...
The optically active form of tritium-labeled A-factor (2-isocapryloyl-3R-hydroxymethyl-gamma-butyrolactone), a pleiotropic autoregulator responsible for streptomycin production, resistance, and sporulation in Streptomyces griseus, was chemically synthesized. By using the radioactive A-factor, binding protein detected cytoplasmic fraction this organism. had an apparent molecular weight approximately 26,000, as determined by gel filtration. Scatchard analysis suggested that bound molar ratio...