Briefly review past work Overview of BAT work: Bioassays Pyrolysis Smoke chemistry SOME DEFINITIONS (a) Tobacco constituent: A substance naturally present in tobacco Tobacco ingredient: A substance, generally a flavor material, added to tobacco during the cigarette manufacturing process SOME DEFINITIONS (b) FLAVORS Impart a specific taste, flavor or aroma: Casings-applied to pre-cut tobacco (few %) - often recognised foodstuffs Flavorings (top flavors) - applied to cut and processed tobacco (ppm levels, several flavors in mixture) SOME DEFINITIONS (c) ADDITIVES Used for a specific technological purpose, e.g.: Humectants increase tobacco moisture-holding capacity Preservatives protect product deteriation from microorganisms Binders and strengtheners maintain physical state of product Fillers contribute to volume without contributing to odor, taste or flavor Potentially, ingredients can: Distil into smoke Decompose/oxidise and products enter smoke Reaction products react with smoke constituents and affect their yields and generate other smoke products GENERAL ASSUMPTIONS BY HEALTH AUTHORITIES Flavor ingredients increase the toxicity of smoke Low tar cigarettes have higher levels of flavor ingredients than higher yield cigarettes US Surgeon Generals Report, 1979 In a section discussing technical achievements to develop low tar cigarettes, stated: All of these developments have led to increased use of flavor additives, especially for low-tar, low-nicotine cigarettes
Conversely, by removing the flower you can get a more structured tobacco, as the leaves will be rich in oils and other nutrients without the flower
Editor's note: This article was updated at 7 p.m
Twice-a-year injections are now a reality
By comparison, a cigarette display cabinet adds a cleaner structure, better product protection, optional doors, and a more finished retail appearance
