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170 results

  1. Ann. Tabac, 1993, Sect. 1-22, p. 11-7., ISSN.0399-0206

    Comparative study of two experimental models for estimation of biological activity of tobacco smoke condensates

    BARRIEU D.; POULIN N.
    SEITA, Centre de Recherche, Fleury les Aubrais, France
    Two models for the collection of smoke condensates, in order to measure biological activity are tested in this work:- Mechanical smoking of hand-made cigarettes- Pyrolysis of tobacco powder Hand-made cigarettes are prepared with preformed paper tubes on ...
  2. Bull. ARN, 1993, p. 10-20., ISSN.1146-6200

    Functional and structural heterogeneity of the plasma membrane of tobacco leaves (N. tabacum L. cv. Xanthi) during ontogenesis

    MASSON F.; ROSSIGNOL M.
    INRA, Lab. Biochimie et Physiologie Végétales, Montpellier, France
    Growth substances are known to control the plant development. The action mecanism is not really well known but in some cases, early stages seem to be located at the plasma membrane where the characteristics of the extracellular environment are detected ...