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By Karl A D Swift

ISBN-10: 0854048219

ISBN-13: 9780854048212

This e-book is a compilation of 16 of the twenty papers provided on the 2001 RSC/SCI flavours and fragrances convention at Scarman residence, college of Warwick.

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Extra resources for Advances in Flavours and Fragrances: From the Sensation to the Synthesis

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Angelica lactone (5-Methyl-2,3H-furanone) exist as an equilibrium of three isomers of the double bond, which show different GC patterns under different GC conditions. 15 N NMR data of 31 different pyrazines was measured and evaluated. Chemical shifts ranges were determined for alkyl, alcoxy, thioalcoxy , acetyl and chloro substituents. The effect of electronic properties of substituents on chemical shifts of pyrazines in 15 N, 13Cand 'H NMR spectra was studied. The combined data enabled us to better understand the "N-NMR of pyrazines and to evaluate and predict their structure more accurately.

J. Pawliszyn, Solid Phase Microextraction, Theory and Principles, Wiley-VCH, New York, 1997. 38 Advances in Flavours and Fragrances 8. J. Pawliszyn, Applications of Solid Phase Microextraction, Royal Society of Chemistry, Hertfordshire, England, 1999. 9. E. -G. Janssen, P. A. Cramers, J. High Resolut. , 1997,20, 385 10. E. Baltussen, A. den Boer, P. -G. A. Cramers, Chromatographia 1999,49,520. 1 1 . E . Baltussen, F. David, P. -G. A. Cramers, Anal. , 1999 71, 5193. 12. E. Baltussen, P. Sandra, F.

Benzenes Effect Upfield Upfield Downfield ~ ~ 53 Analytical 5 SUMMARY While calculating the purity of a-diketones, one has to take into account the sum of the 2 peaks (keto and enol), and not onlv the major keto form peak. Angelica lactone (5-Methyl-2,3H-furanone) exist as an equilibrium of three isomers of the double bond, which show different GC patterns under different GC conditions. 15 N NMR data of 31 different pyrazines was measured and evaluated. Chemical shifts ranges were determined for alkyl, alcoxy, thioalcoxy , acetyl and chloro substituents.

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Advances in Flavours and Fragrances: From the Sensation to the Synthesis by Karl A D Swift


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