Abstract: The invention relates to a coaxial cigarette including a coaxial tobacco rod comprising a rod core, a rod core wrapping, a rod jacket and a rod jacket wrapping and a multi-part ventilated filter wherein the filter comprises a filter wrapping as well as at least two longitudinal segments of which at least one is a coaxial filter segment having a core element, a core element wrapping and a jacket element and wherein the ratio of the resistance to draw of the rod core to the resistance to draw of the rod jacket is greater than unity and preferably in the range of 2 to 4.

Abstract: A method is described for extracting tobacco alkaloids from tobacco in which the tobacco alkaloids are extracted from the tobacco with carbon dioxide under supercritical conditions and the tobacco alkaloids separated from the carbon dioxide, wherein in the carbon dioxide for the extraction of the tobacco alkaloids from the tobacco is mixed with a solid 2 to 3-basic organic acid having a total of 2 to 6 carbon atoms, a monoalkali or monoammonium salts thereof in order to appreciably shorten the extraction times.

Abstract: With the present invention a tobacco sheet or foil is proposed which has an elevated filling force and consists of tobacco particles, water, binders and moisturizers, and relatively gas-impermeable, in particular surface-sealed cover layers being connected together by a spongy structure which is formed by gas-filled bubbles, and in which cavities are formed having a shaggy, furrowed and/or torn surface.

Abstract: Aromatic substances are produced from diterpene fractions in a solvent which is oxidized in the absence of photochemically active radiation. The oxidation is performed with an oxidizing agent in the presence of a catalyst. The oxidizing agent is selected from oxygen, peroxo compounds, halogenates and periodates. The catalyst is selected from compounds of tin, lead, cerium, and transition metals of groups Ib, IVb, Vb, VIb, VIIb and VIII.

Abstract: Aromatic substances to be applied to tobacco to improve aroma characteristics are prepared by exposing an alcoholic extract, which contains diterpenes and has been isolated from the surface resin of fresh tobacco plants, parts or from gum originating from tobacco flowers, to ultraviolet light and oxygen.