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189 results

  1. Beitr. Tabakforsch. Int., 1989, 14-5, p. 261-82., ISSN.0173-783X

    Evaluation of a tobacco fractionation procedure using pyrolysis mass spectrometry combined with multivariate analysis

    SCHEIJEN M.A.; BRANDT-DE-BOER B.; BOON J.J.
    Unit for Mass Spectrometry of Macromolecular Systems, FOM Inst. for Atomic and Molecular Physics, Amsterdam, The Netherlands
    Correlation coefficients calculated from the weights of the polymer fractions obtained and data obtained with classical wet-chemical methods show that these parameters have a low resolving power, which precludes any detailed distinction between tobaccos ...
  2. Beitr. Tabakforsch. Int., 1989, 14-5, p. 283-8., ISSN.0173-783X

    The transfer of tobacco additives to cigarette smoke. Examination of the possible contribution of pyrolysis products to mainstream smoke composition

    GREEN J.D.; CHALMERS J.; KINNARD P.J.
    British American Tobacco, R&D Centre, Southampton, UK
    The distribution of six radiolabelled model flavourants in cigarette smoke has been described. The possibility of pyrolytic products occurring in the mainstream smoke has been thoroughly examined. Of the six flavourants used four showed no detectable ...
  3. Beitr. Tabakforsch. Int., 1989, 14-5, p. 321-6., ISSN.0173-783X

    A transient method for determining thermal diffusivity of tobacco stems

    BARTHAKUR N.N.; ARNOLD N.P.
    Macdonald College of McGill University, Dept. of Renewable Resources, Ste Anne de Bellevue, Quebec, Canada.
    A microwave generator and a closed-circuit wind tunnel were used to measure the thermal diffusivity of tobacco (Nicotiana tabacum L.) stems in vivo by the unsteady-state method. A simple mathematical model for heat flow, based on Fourier's heat ...
  4. Bull. Spec. CORESTA Symposium, Kallithea, 1990, P. 142, 142, ISSN.0525-6240

    Transfer of cytoplasmic male sterility to Nicotiana tabacum L. by protoplast fusion

    NIKOVA V.; MENCZEL I.
    Institute of Genetics, Sofia, Bulgaria. Institute of Plant Physiology. Szeged. Hungary.
    Protoplast fusion was used for producing cytoplasmic male sterile (CMS) tobaccos within a shorter period of time (one year) than the conventional backcross method, for which several years are required. Mesophyl protoplasts of CMS line (N. tabacum cv. ...
  5. Bull. Spec. CORESTA Symposium, Kallithea, 1990, p. 102, ST01, ISSN.0525-6240

    Measurement of the performance of some new vapour phase active filters by an improved gas chromatographic method

    DUNN M.; GRAHAM J.F.; SHEPHERD R.J.K.; TAYLOR M.J.
    Filtrona International Limited, Jarrow, Tyne & Wear, UK
    The increasing world-wide interest in the use of cigarette filters using granular adsorbents has lead to the need for a rapid method to measure the activities of such materials in cigarette filters. Previously, the vapour phase activity of filters was ...