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165 results

  1. Beitr. Tabakforsch. Int./Contrib. Tob. Research, 2001, 19-4, p. 177-88., ISSN.0173-783X

    The use of nonlinear constitutive equations to evaluate draw resistance and filter ventilation

    EITZINGER B.; EDERER C.
    WFT Research, Trierenberg Holding, Traun, Austria
    This study investigates by nonlinear constitutive equations the influence of tipping paper, cigarette paper, filter, and tobacco rod on the degree of filter ventilation and draw resistance. Starting from the laws of conservation, the path to the theory of ...
  2. Beitr. Tabakforsch. Int./Contrib. Tob. Research, 2001, 19-4, p. 189-203., ISSN.0173-783X

    A mathematical scheme for calculating flows and pressure drops in lit and unlit cigarettes

    DWYER R.W.; CHEN P.; WASYK R.D.
    Philip Morris USA, Research Center, Richmond, VA, USA
    A computational methodology is presented for evaluating the flows and pressure drops in both lit and unlit cigarettes. The flows and pressure drops across rows of tipping-paper perforations are considered explicitly, as are the locations and relative ...
  3. Beitr. Tabakforsch. Int./Contrib. Tob. Research, 2001, 19-4, p. 209-28., ISSN.0173-783X

    A review of the incidence and consequences of cigarette filter vent blocking among smokers

    BAKER R.R.; LEWIS L.L.
    British American Tobacco, R&D Centre, Southampton, UK
    Vent blocking, the covering of the filter ventilation zone on a cigarette during smoking, is a potentially important aspect of smoking behavior. Various techniques have been used to assess the incidence of vent blocking, and widely different views have ...
  4. Beitr. Tabakforsch. Int./Contrib. Tob. Research, 2001, 19-5, p. 237-44., ISSN.0173-783X

    Determination of the transfer efficiency of d-nicotine to mainstream smoke

    PERFETTI T.A.; GORDON B.M.; COLEMAN W.M. III
    R.J. Reynolds Tobacco Company, Winston Salem, NC, USA
    Experiments were conducted to independently determine the mainstream smoke transfer efficiency of d-nicotine and l-nicotine. Two types of cigarettes (University of Kentucky 2R1 reference cigarette and a cigarette prepared from reconstituted sheet material ...
  5. Beitr. Tabakforsch. Int./Contrib. Tob. Research, 2001, 19-6, p. 297-307., ISSN.0173-783X

    The heat of combustion of tobacco and carbon oxide formation

    NORMAN A.B.; PERFETTI T.A.; PERFETTI P.F.
    R.J. Reynolds Tobacco Company, Winston Salem, NC, USA
    Recent studies demonstrated a relationship between mass burn rates of straight-grade cigarettes and heats of combustion of the tobacco materials. In the present work, relationships between measured heats of combustion and elemental composition of the ...
  6. Beitr. Tabakforsch. Int./Contrib. Tob. Research, 2001, 19-6, p. 309-14., ISSN.0173-783X

    Floral morphology and some other characteristics of lso-genomic alloplasmics of Nicotiana tabacum L

    BERBEC A.
    Institute of Soil Science and Plant Cultivation, Dept. of Special Crops, Pulawy, Poland.
    Cytoplasms of several Nicotiana species- N. amplexicaulis, N. bigelovii, N. debneyi, N. eastii, N. exigua, N. glauca, N. glutinosa, N. goodspeedii, N. knightiana, N. occidentalis, N. plumbaginifolia, N. raimondii, N. suaveolens, N. undulata- were bred ...