User talk:Titab

Understanding the role of smoking regime on smoke chemistry and yields A lot of studies have been carried out on  the influence of different smoking parameters on smoke and constituent yields using methods originally developed to analyse our conventional products.

Below is a table of different machine smoking regimes

ISO Method Massachusetts Canadian 'Intense' Puff volume (cm3) 35      45                   55 Puff frequency(s) 60     30                   30 Puff duration (s) 2        2                    2 Vent blocking (%) 0       50                   100

Using these methods we have examined the effects of cigarette components and design parameters on yields under different smoking regimes, allowing us to predict toxicant yields from different cigarette design parameters.

A recent review identified the role of alternative smoking regimes in influencing overall smoke and individual toxicant yields, using study data from 1997 to 2006.

Briefly, mainstream smoke yields as measured by smoking machines increase as larger puff volumes, more frequent puffs are taken, or filter vent-blocking is applied to highly ventilated cigarettes. This is largely the result of more tobacco being consumed during a puff to form mainstream smoke. Many possible changes may occur within the burning cigarette as the cigarettes are smoked with different smoking regimes. However, the extent of the change to the mainstream smoke composition, as contributed from various smoke formation mechanisms (combustion, pyrolysis, pyrosynthesis and direct transfer) has not been systematically studied