The Experts below are selected from a list of 162 Experts worldwide ranked by ideXlab platform
David B Harper - One of the best experts on this subject based on the ideXlab platform.
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fluoro fatty acids in seed oil of Dichapetalum toxicarium
Phytochemistry, 1997Co-Authors: John T G Hamilton, David B HarperAbstract:The fatty acid composition of the seed oil of Dichapetalum toxicarium was examined by GC-mass spectrometry. The presence of ω-fluoro-palmitoleic, -stearic, -linoleic, -arachidic and -eicosenoic acids was established, in addition to that of the ω-fluoro derivatives of oleic and palmitic acids previously isolated from this source. Strong evidence was also obtained for the presence of 18-fluoro-9,10-epoxystearic acid.
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high levels of monofluoroacetate in Dichapetalum braunii
Phytochemistry, 1993Co-Authors: David Ohagan, Roger Perry, Mike J Lock, J Marion J Meyer, Lakkaraju Dasaradhi, John T G Hamilton, David B HarperAbstract:Abstract Monofluoroacetate occurs in young leaves and seeds of Dichapetalum braunii Engl. & K. Krause from southeast Tanzania at concentrations of 7200 and 8000 ppm, respectively, on a dry weight basis. This is the highest level so far reported from a plant source. The fluoride and monofluoroacetate (MFA) concentrations in this species are compared with those of six other Dichapetalum spp. collected from the same locality in Tanzania. The seeds of D. braunii , unlike D. toxicarium , do not contain any ω-fluorinated fatty acids.
David O'hagan - One of the best experts on this subject based on the ideXlab platform.
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Conversion of fluoropyruvate to fluoroacetate by Dichapetalum cymosum
Phytochemistry, 1992Co-Authors: J.j. Marion Meyer, David O'haganAbstract:Abstract Studies utilising 19 F NMR spectroscopy have demonstrated that callus culture of Dichapetalum cymosum can efficiently convert fluoropyruvate to fluoroacetate, fluorolactate and fluoride. The conversion of fluoropyruvate to fluoroacetate is unusual in a biological system and the possible role of fluoropyruvate in the biosynthesis of fluoroacetate is discussed.
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Conversion of 3-fluoropyruvate to fluoroacetate by cell-free extracts of Dichapetalum cymosum
Phytochemistry, 1992Co-Authors: J.j. Marion Meyer, David O'haganAbstract:Abstract A cell-free extract derived from callus tissue of Dichapetalum cymosum was able to oxidatively decarboxylate fluropyruvate to give fluoroacetate. By employing sodium monomethyl acetylphosphonate, an inhibitor of the pyruvate dehydrogenase complex (PDC), fluoroacetate production was increased and it was demonstrated unambiguously that PDC is not responsible for this transformation in D. cymosum .
John T G Hamilton - One of the best experts on this subject based on the ideXlab platform.
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fluoro fatty acids in seed oil of Dichapetalum toxicarium
Phytochemistry, 1997Co-Authors: John T G Hamilton, David B HarperAbstract:The fatty acid composition of the seed oil of Dichapetalum toxicarium was examined by GC-mass spectrometry. The presence of ω-fluoro-palmitoleic, -stearic, -linoleic, -arachidic and -eicosenoic acids was established, in addition to that of the ω-fluoro derivatives of oleic and palmitic acids previously isolated from this source. Strong evidence was also obtained for the presence of 18-fluoro-9,10-epoxystearic acid.
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high levels of monofluoroacetate in Dichapetalum braunii
Phytochemistry, 1993Co-Authors: David Ohagan, Roger Perry, Mike J Lock, J Marion J Meyer, Lakkaraju Dasaradhi, John T G Hamilton, David B HarperAbstract:Abstract Monofluoroacetate occurs in young leaves and seeds of Dichapetalum braunii Engl. & K. Krause from southeast Tanzania at concentrations of 7200 and 8000 ppm, respectively, on a dry weight basis. This is the highest level so far reported from a plant source. The fluoride and monofluoroacetate (MFA) concentrations in this species are compared with those of six other Dichapetalum spp. collected from the same locality in Tanzania. The seeds of D. braunii , unlike D. toxicarium , do not contain any ω-fluorinated fatty acids.
J.j. Marion Meyer - One of the best experts on this subject based on the ideXlab platform.
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Conversion of 3-fluoropyruvate to fluoroacetate by cell-free extracts of Dichapetalum cymosum
Phytochemistry, 1992Co-Authors: J.j. Marion Meyer, David O'haganAbstract:Abstract A cell-free extract derived from callus tissue of Dichapetalum cymosum was able to oxidatively decarboxylate fluropyruvate to give fluoroacetate. By employing sodium monomethyl acetylphosphonate, an inhibitor of the pyruvate dehydrogenase complex (PDC), fluoroacetate production was increased and it was demonstrated unambiguously that PDC is not responsible for this transformation in D. cymosum .
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Conversion of fluoropyruvate to fluoroacetate by Dichapetalum cymosum
Phytochemistry, 1992Co-Authors: J.j. Marion Meyer, David O'haganAbstract:Abstract Studies utilising 19 F NMR spectroscopy have demonstrated that callus culture of Dichapetalum cymosum can efficiently convert fluoropyruvate to fluoroacetate, fluorolactate and fluoride. The conversion of fluoropyruvate to fluoroacetate is unusual in a biological system and the possible role of fluoropyruvate in the biosynthesis of fluoroacetate is discussed.
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Fluoroacetate Degradation by Dichapetalum cymosum
Journal of Plant Physiology, 1991Co-Authors: J.j. Marion Meyer, Nathanaël GrobbelaarAbstract:Summary The Fluoroacetate-containing plant, Dichapetalum cymosum , is capable of releasing CO 2 from fluoroacetate. Fluoroacetate is more readily degraded by the old than the young leaves of the plant. An aseptic callus culture of D. cymosum is also capable of degrading f luoroacetate albeit at a much lower rate than the leaves of the plant. Inoculation of the callus with Pseudomonas cepacia isolated from the plant increased the rate of CO 2 release from Fluoroacetate about five-fold.
Wayne Frederick Truter - One of the best experts on this subject based on the ideXlab platform.
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probleemplante vir vee en veeboere deel 3 Dichapetalum cymosum gifblaar
Veeplaas, 2012Co-Authors: C F Reinhardt, Wayne Frederick TruterAbstract:Gifblaar is 'n klein dwergagtige struik wanneer dit bogronds beskou word. Ondergronds het dit egter sulke uitgebreide stam- en wortelvertakkings dat daarna as 'n ondergrondse boom verwys word, waarvan net die punte van takke bo die grond uitsteek.
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probleemplante vir vee en veeboere deel 3 Dichapetalum cymosum gifblaar weidings gewasse
Veeplaas, 2012Co-Authors: Charlie Reinhardt, Wayne Frederick TruterAbstract:Gifblaar is 'n klein dwergagtige struik wanneer dit bogronds beskou word. Ondergronds het dit egter sulke uitgebreide stam- en wortelvertakkings dat daarna as 'n ondergrondse boom verwys word, waarvan net die punte van takke bo die grond uitsteek.