The Experts below are selected from a list of 192 Experts worldwide ranked by ideXlab platform
Naomichi Baba - One of the best experts on this subject based on the ideXlab platform.
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Ketosteroids As Arrestants to Oryzaephilus surinamensis (L.) from Wheat Flour Infested by the Same Weevil
1997Co-Authors: Shuhei Nakajima, Taro Takeda, Keiji Sugawara, Junkichi Iwasa, Akiko Okamoto, Naomichi BabaAbstract:From hexane extract of wheat flour infested by the sawtoothed gain beetle [Oryzaephilus surinamensis (L.); Coleoptera; Silvanidae, three ketosteroids,cholestan-3-one(3),ergostan-3-one(4)and stigmastan-3-one(5),were obtained in a mixture and identified as arrestants to this weevil.
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Synthesis of 13-Oxo-(Z)-9-octadecenoic Acid and 15-Oxo-(Z)-11-icosenoic Acid, Arrestants of Oryzaephilus surinamensis L.
Bioscience Biotechnology and Biochemistry, 1997Co-Authors: Shuhei Nakajima, Aiko Okamura, Taro Takeda, Keiji Sugawara, Masaya Tateishi, Junkichi Iwasa, Naomichi BabaAbstract:Two arrestants of the sawtoothed grain beetle (Oryzaephilus surinamensis L.), 13-oxo-(Z)-9-octadecenoic acid and 15-oxo-(Z)11-icosenoic acid, were synthesized for the first time by utilizing a Z-selective Wittig reaction.
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Arrestants to Oryzaephilus surinamensis L. from Wheat Flour Infested by the Same Weevil
Bioscience Biotechnology and Biochemistry, 1996Co-Authors: Shuhei Nakajima, Aiko Okamura, Taro Takeda, Keiji Sugawara, Masaya Tateishi, Junkichi Iwasa, Naomichi BabaAbstract:From a hexane extract of wheat flour infested by the sawtoothed grain beetle [Oryzaephilus surinamensis (L.); Coleoptera; Silvanidae], two compounds having arrestive activity were isolated and identified as 13-oxo-cis-9-octadecenoic acid and 15-oxo-cis-11-icosenoic acid.
Shuhei Nakajima - One of the best experts on this subject based on the ideXlab platform.
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Ketosteroids As Arrestants to Oryzaephilus surinamensis (L.) from Wheat Flour Infested by the Same Weevil
1997Co-Authors: Shuhei Nakajima, Taro Takeda, Keiji Sugawara, Junkichi Iwasa, Akiko Okamoto, Naomichi BabaAbstract:From hexane extract of wheat flour infested by the sawtoothed gain beetle [Oryzaephilus surinamensis (L.); Coleoptera; Silvanidae, three ketosteroids,cholestan-3-one(3),ergostan-3-one(4)and stigmastan-3-one(5),were obtained in a mixture and identified as arrestants to this weevil.
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Synthesis of 13-Oxo-(Z)-9-octadecenoic Acid and 15-Oxo-(Z)-11-icosenoic Acid, Arrestants of Oryzaephilus surinamensis L.
Bioscience Biotechnology and Biochemistry, 1997Co-Authors: Shuhei Nakajima, Aiko Okamura, Taro Takeda, Keiji Sugawara, Masaya Tateishi, Junkichi Iwasa, Naomichi BabaAbstract:Two arrestants of the sawtoothed grain beetle (Oryzaephilus surinamensis L.), 13-oxo-(Z)-9-octadecenoic acid and 15-oxo-(Z)11-icosenoic acid, were synthesized for the first time by utilizing a Z-selective Wittig reaction.
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Arrestants to Oryzaephilus surinamensis L. from Wheat Flour Infested by the Same Weevil
Bioscience Biotechnology and Biochemistry, 1996Co-Authors: Shuhei Nakajima, Aiko Okamura, Taro Takeda, Keiji Sugawara, Masaya Tateishi, Junkichi Iwasa, Naomichi BabaAbstract:From a hexane extract of wheat flour infested by the sawtoothed grain beetle [Oryzaephilus surinamensis (L.); Coleoptera; Silvanidae], two compounds having arrestive activity were isolated and identified as 13-oxo-cis-9-octadecenoic acid and 15-oxo-cis-11-icosenoic acid.
A S Lapenta - One of the best experts on this subject based on the ideXlab platform.
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genetic variability in esterases and the insecticide resistance in brazilian strains of Oryzaephilus mercator and Oryzaephilus surinamensis coleoptera silvanidae
Bulletin of Entomological Research, 2011Co-Authors: G A R Silva, A S LapentaAbstract:Oryzaephilus mercator and O. surinamensis are stored grains and processed food pests, the latter being responsible for major economical losses. Polyacrylamide gel electrophoresis was used to analyse esterase patterns during insect development. Seven esterases, three cholinesterases, two carboxylesterases and two acetylesterases, were identified in O. mercator , one of which was proper to adults. Five esterases, of which four were cholinesterases, occurred in O. surinamensis. Strains of O. mercator and O. surinamensis were also exposed to malathion and chlorpyrifos-methyl. According to the LC 50 estimates, OmLC-M and OmLA strains of O. mercator and OsLB strain of O. surinamensis were the most resistant to both insecticides. However, higher sensitivity to malathion and chlorpyrifos-methyl has also been verified in some of its esterases. Cholinesterases OmEST-1 and OsEST-5 seem to be involved in this resistance. These results suggest that organophosphate tolerance may be related to genetic variability in esterase isoenzymes.
Ian D. R. Stevens - One of the best experts on this subject based on the ideXlab platform.
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A concise, efficient and flexible strategy for the synthesis of the pheromones of Oryzaephilus and Cryptolestes grain beetles
Synthesis, 1993Co-Authors: Christopher D. J. Boden, John Chambers, Ian D. R. StevensAbstract:Six of the seven macrolide components of the pheromone systems of grain beetles of the genera Oryzaephilus and Cryptolestes are synthesised by new routes of greatly improved efficiency. Iterative methodology based on the Wittig olefination is employed for the construction of the (Z,Z)-1,4-diene subunits in three of the lactones; chlorite oxidation of (Z)-3-alkenals derived by this methodology is used to form the (Z)-3-alkenoic acid functionalities present in four of the targets. The use of recently described conditions for the cyclisation of a Combretastatin analogue gives dramatically increased yields for the macrolactonisation steps in all six cases
Keiji Sugawara - One of the best experts on this subject based on the ideXlab platform.
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Ketosteroids As Arrestants to Oryzaephilus surinamensis (L.) from Wheat Flour Infested by the Same Weevil
1997Co-Authors: Shuhei Nakajima, Taro Takeda, Keiji Sugawara, Junkichi Iwasa, Akiko Okamoto, Naomichi BabaAbstract:From hexane extract of wheat flour infested by the sawtoothed gain beetle [Oryzaephilus surinamensis (L.); Coleoptera; Silvanidae, three ketosteroids,cholestan-3-one(3),ergostan-3-one(4)and stigmastan-3-one(5),were obtained in a mixture and identified as arrestants to this weevil.
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Synthesis of 13-Oxo-(Z)-9-octadecenoic Acid and 15-Oxo-(Z)-11-icosenoic Acid, Arrestants of Oryzaephilus surinamensis L.
Bioscience Biotechnology and Biochemistry, 1997Co-Authors: Shuhei Nakajima, Aiko Okamura, Taro Takeda, Keiji Sugawara, Masaya Tateishi, Junkichi Iwasa, Naomichi BabaAbstract:Two arrestants of the sawtoothed grain beetle (Oryzaephilus surinamensis L.), 13-oxo-(Z)-9-octadecenoic acid and 15-oxo-(Z)11-icosenoic acid, were synthesized for the first time by utilizing a Z-selective Wittig reaction.
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Arrestants to Oryzaephilus surinamensis L. from Wheat Flour Infested by the Same Weevil
Bioscience Biotechnology and Biochemistry, 1996Co-Authors: Shuhei Nakajima, Aiko Okamura, Taro Takeda, Keiji Sugawara, Masaya Tateishi, Junkichi Iwasa, Naomichi BabaAbstract:From a hexane extract of wheat flour infested by the sawtoothed grain beetle [Oryzaephilus surinamensis (L.); Coleoptera; Silvanidae], two compounds having arrestive activity were isolated and identified as 13-oxo-cis-9-octadecenoic acid and 15-oxo-cis-11-icosenoic acid.