Method of treating tobacco to reduce nitrosamine content,...

A - Human Necessities – 24 – B

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A24B 3/10 (2006.01) A24B 3/18 (2006.01) A24B 15/00 (2006.01) A24B 15/18 (2006.01) A24B 15/22 (2006.01) A24F 47/00 (2006.01)

Patent

CA 2294130

Methods of reducing the content of and preventing formation of carcinogenic nitrosamines in harvested leafy plants such as tobacco and marijuana are disclosed. The methods are directed to subjecting the plant to microwave and/or higher frequency radiation, at appropriate times in the cure cycle. With tobacco, products suitable for human consumption, such as cigarettes, cigars, etc., can be made in accordance with the present invention, having contents of tobacco-specific nitrosamines on a par with fresh-cut, green tocacco. In preferred embodiments, the resultant tobacco products are dried, golden-yellow leaves having almost negligible amounts of the known carcinogens NNN and NNK, in comparison to conventionally cured tobacco.

L'invention concerne des procédés visant à réduire la teneur en nitrosamines cancérigènes dans certains végétaux à feuilles cultivés (par exemple, tabac et marijuana) et à empêcher la formation de ces substances, lesdits procédés consistant à soumettre les feuilles récoltées à des rayonnements en hyperfréquences et/ou aux fréquences plus élevées, à des stades appropriés du cycle de traitement. S'agissant du tabac, on peut fabriquer des produits convenant à la consommation humaine (cigarettes, cigares, etc.) grâce aux procédés décrits, ce qui donne dans les produits résultants une teneur en nitrosamines spécifiques du tabac qui équivaut à la teneur propre au tabac vert fraîchement coupé. Dans les modes de réalisation préférés, les produits résultants sont séchés, et les feuilles de tabac jaune doré ont alors une teneur presque négligeable en substances cancérigènes connues, NNN et NNK, par rapport au tabac traité de manière classique.

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