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7 rezultatov
Genetic variation in alkaloid accumulation in leaves of Nicotiana.
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Prijava / prijava
Alkaloids are plant secondary metabolites that are widely distributed in Nicotiana species and contribute greatly to the quality of tobacco leaves. Some alkaloids, such as nornicotine and myosmine, have adverse effects on human health. To reduce the content of harmful alkaloids in tobacco leaves
Alkaloid chemophenetics and transcriptomics of the Nicotiana genus
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Prijava / prijava
In this study, we determined the pyridine alkaloid content (nicotine, nornicotine, anabasine, anatabine, cotinine, and myosmine) of 58 species and 2 subspecies of the Nicotiana genus by ultra-high-performance liquid chromatography coupled with mass spectrometry. We observed clear correlation between
A reversed-phase HPLC-UV method developed and validated for simultaneous quantification of six alkaloids from Nicotiana spp.
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Prijava / prijava
A reversed-phase HPLC-UV method was developed, optimized, and validated for the separation and quantitation of six target alkaloids from leaves of Nicotiana species (nicotine, nornicotine, anatabine, anabasine, myosmine, and cotinine). A bidentate reversed-phase C18 column was used as stationary
Nicotine demethylation in Nicotiana cell suspension cultures: N'-formylnornicotine is not involved.
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Prijava / prijava
Nicotine or nornicotine enriched with stable isotopes in either the N'-methyl group or the pyrrolidine-N were fed to Nicotiana plumbaginifolia suspension cell cultures that do not form endogenous nicotine. The metabolism of these compounds was investigated by analysing the incorporation of isotope
Swords into plowshares? Nicotiana sylvestris does not use nicotine as a nitrogen source under nitrogen-limited growth.
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Prijava / prijava
Whether or not a plant can recover its investment of resources in a chemical defense is central to the "mobile-immobile" metabolite dichotomy of the resource availability theory. Biochemical measures of metabolite turnover have been used to estimate this trait, but they do not address the ecological
Validation of a GC-FID method for rapid quantification of nicotine in fermented extracts prepared from Nicotiana tabacum fresh leaves and studies of nicotine metabolites.
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Prijava / prijava
A new GC-FID method, which allows rapid and reliable quantitation of nicotine in tobacco leaf extracts, was developed and validated. To avoid nicotine adsorption on the column, an amine-deactivated capillary column was used. The method developed was applied to study the degradation of nicotine in a
Application of GC-MS/MS for the analysis of tobacco alkaloids in cigarette filler and various tobacco species.
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Prijava / prijava
This publication reports the first known use of gas chromatography-tandem mass spectrometry for the quantitation of five minor tobacco alkaloids (nornicotine, myosmine, anabasine, anatabine, and isonicoteine) in various tobacco samples. A summary of the concentrations of these minor alkaloid levels
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