By J.W. Gorrod, P. Jacob III
This ebook presents for the 1st time a unmarried accomplished resource of data at the analytical chemistry of nicotine and comparable alkaloids. The editors have introduced jointly scientists from academia and the tobacco to explain the state of the art of the chemistry and analytical tools for dimension of nicotine. either the scope and element of the booklet are remarkable. Chapters describe the heritage, pharmacology and toxicology of nicotine, the biosynthesis of nicotine and different alkaloids within the tobacco plant, the final chemistry of nicotine and the analytical methodologies which have been used to degree nicotine and comparable alkaloids in organic specimens, in tobacco and pharmaceutical items and in tobacco smoke. there's additionally a accomplished evaluation of the chemistry and toxicology of nicotine-derived nitrosamines, a major category of tobacco cancer agents.
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Additional resources for Analytical Determination of Nicotine and Related Compounds and their Metabolites
42 Fannin FF, Bush LP. Nornicotine accumulation in nicotine-fed detached leaves of N. glauca, N. glauca/N, tabacum grafted plants and N. tabacum X N. glauca hybrids. Tob. Chem. Res. , 1989: 43; 28. 43 Fannin FF, Wei X, Bush LP. Mechanism for partial racemization of nornicotine in tobacco. Tob. Chem. Res. , 1996: 5O; 39. 44 Perfetti TA, Coleman WM, III. Chiral-gas chromatography-selected ion monitoring-mass selective detection analysis of secondary alkaloids in tobacco and tobacco smoke. Beit. Tabakforsch.
107] recently reported that exposure of cultured N. tabacum BY-2 cell to MJ brought about enhanced synthesis of nicotine, as well as increases in levels of the precursor of its N-methylpyrrolidine moiety, N-methylputrescine. Evidence was obtained indicating that MJ elicits sequential expression of several genes in the nicotine pathway, probably involving more than one regulatory mechanism. The cellular response to jasmonate was characterized first by elevated expression of the mRNA species of ODC (ornithine decarboxylase), followed by mRNAs of PMT (putrescine methyltransferase) and of S-adenosylmethionine synthase (SAMS).
Wounded, water-treated leaves contained JA levels at 90 min post-wounding that had increased by about 93% as compared to unwounded controls; wounded, regurgitant-treated leaves contained 13-fold more JA than unwounded controls. Again, nicotine pools, greater than in unwounded plants, did not differ between water- and regurgitant-treated, wounded plants. The results suggest that M. sexta larvae can mitigate the alkaloidal response as compared to alkaloidal response from mechanical damage, and 34 Biosynthesis of Nicotine and Related Compounds that such mitigation is mediated by larval regurgitant.