FT-IR evolved gas analysis, a non-isothermal pyrolysis technique, is used to probe the changes in tobacco leaf composition which occur during flue- and air-curing. A unique perspective of major enzymatic processes and their dependencies on curing method is obtained through simultaneous detection of multiple pyrolytic products and three-dimensional presentation of the product evolution profiles. The conversion of starch to sugars, proteins to amino acids, and the relationships between these processes are explored.
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1. Lephardt J. O. and R. A. Fenner: Characterization of pyrolysis and combustion of complex systems using Fourier transform infrared spectroscopy; Appl. Spectrosc. 34 (1980) 174—185.
2. Lephardt J O. and R. A. Fenner: Fourier transform infrared evolved gas analysis — Additional considerations and options; Appl. Spectrosc. 35 (1980) 95—101.
3. Lephardt J. O.: Fourier transform infrared evolved gas analysis (FT-IR-EGA); Appl Spectrosc. Rev. 18 (1982-3) 265-303.
4. Amin A. N. R. C. Long and W. W. Weeks: Transformations of chemical constituents during flue curing of Nicotiana tabacum L. 2. Metabolism of nitrogenous and related constituents; J. Agric. Food Chem. 28 (1980) 656-660.
5. Mohapatra S. C. and W. H. Johnson: Post-harvest physiology of bright leaf tobacco 1. Comparative biochemical changes during the yellowing and drying phases of curing; Tob. Sci. 24 (1980) 37—39.
6. Frankenburg W. G.: Chemical conversions in harvested tobacco leaves; Tob. Int. (N.Y.) 142 No. 13 (1956) 10—14.
7. Palmer J. K.: Changes in the nitrogenous constituents of Burley tobacco during curing and aging; Tob. Sci. 7 (1963) 93-96.
8. Young J. R. and R. N. Jeffrey: Changes in certain water-soluble nitrogenous constituents of Burley tobacco during curing; Plant Physiol. (Bethesda) 18 (1943) 433-448.
9. Frankenburg W. G. A. M. Gottscho A. A. Vaite-kunas and R. Zacharius: The effect of drying and fermentation on the nitrogen compounds in cigar tobacco leaves; Proc. 1st Int. Sci. Tob. Congr. Paris — Bergerac 1955 pp. 426—431.
10. Hamilton J. L. and R. H. Lowe: Changes in the concentration of proteins amino acids and ammonia in Burley tobacco during air curing; Tob. Sci. 22 (1978) 89—93.