Cooperation Centre for Scientific Research Relative to Tobacco
Centre de Coopération pour les Recherches Scientifiques Relatives au Tabac

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...

In the tobacco industry the notion of flow rate often brings into conflict the different partners who compete at the setting-up or running of a production line. The author wants to point out different characteristic traits which have guided...

Yesterday, image analysis applied in biology and medecine, principally to microscopic observation of cells. Nowadays, it's established more and more in industry with the growth of the automation market. This paper describes, at first, some...

Six HPLC methods for the analysis of tobacco smoke are described in this study. These methods allow then determination of 22 main components of cigarette smoke: The volatile carbonyl compounds are analysed after reaction with 2,4 DNPH (2,4...

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...

In practice, the cultivation of some types of tobacco requires high rates of nitrogen fertilisation, in order to ensure optimal yields. In consequence, one finds an accumulation of nitrate in the lower leaves of certain types of tobacco such as...

The principal route of entry of the pollutant metal cadmium (Cd) into plants is via uptake from soil, where it is present at 0.15 to 0.2 ppm. Leguminosae are weak accumulators of Cd; Gramineae , Liliaceae, Cucurbitaceae, and Umbelliferae...

Transposable elements are DNA fragments able to transpose from one locus of the genome to another, and to modify the expression of genes in which they insert. In plants, two classes of transposable elements have been isolated. "Classical" elements...

The determination of air nicotine content is very important to estimate the amount of this toxic which is inhaled by the non-smokers. In this study, a process of its evaluation, is expanded, that presents good analytical performances. This process...