Smoked products compounds identified from smoke,

Uses Not known. Based on data obtained from photolysis studies of tobacco, this compound, a-and p-endosulfan, and other products were identified in tobacco smoke (Chopra et ah, 1977). 

Because many esters have an aroma or taste acceptable to the consumer, the list of individual compounds used as tobacco ingredients by U.S. tobacco manufacturers contains numerous esters. Such a list was prepared by Doull et al. (1053) from information provided by the U.S. tobacco product manufacturers. A detailed examination of the Doull et al. list by Rodgman (3266) revealed that many of the added ingredients had been identified in additive-free tobacco and/or its smoke. 

Smoking is a slow process and it is not easy to control the process. Smoke contains phenolic compounds, adds, and carbonyls and smoke flavor is primarily due to the volatile phenolic compound [10,20,34]. Wood smoke is extranely complex and more than 400 volatiles have been identified [43]. Guillen and Manzanos [26] identified around 140 compounds in liquid smoke prepared from Thymus vulgaris wood. Polycyclic aromatic hydrocarbons are ubiquitous in the environment as pyrolysis products of organic matter. Their concentrations in smoked food can reach levels hazardous for human health, especially when the smoking procedure is carried out under uncontrolled conditions [46]. Wood smoke contains nitrogen oxides, polycyclic aromatic hydrocarbons, phenolic compounds, furans, carbonylic compounds, aliphatic carboxylic acids, tar compounds, carbohydrates. 

For example, the main phenol with antioxidative and antimutagenic activities that occurs in crude canola oil is 2,6-dimethoxy-4-vinylphenol known as canolol, which is produced from syringic acids. The major products of caffeic acid pyrolysis at 225 °C are pyrocatechol, 4-vinylpyrocatechol and 4-ethylpyrocatechol (see Section 8.3.4). A more complex mixture of products arises by pyrolysis of lignin, in the smoke condensates used in the meat industry, more than 150 different phenols, and dozens of aromatic alcohols, phenolic acids and hydroxylated heterocyclic compounds have been identified. 

Apart from the tetrakis dialkylamino-ethylenes, the only other compounds which have been reported to be spontaneously chemiluminescent in air, are certain thioesters [5]. In contrast, the tetrakis alkylthio-ethylenes are not luminescent [6]. Sulphuric acid is the only product to be identified in what is evidently a gas phase reaction. The light intensity is roughly in proportion to the volatility of the esters (9-11). Although the report is sufficiently detailed as to describe the formation of luminescent smoke rings, attempts to reproduce the phenomenon have not been successful [7]. 

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