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13 results

  1. Beitr. Tabakforsch. Int., 1997, 17-3, p. 75-95., ISSN.0173-783X

    The role of amino acids and sugars in the production of volatile materials in microwave heated tobacco dust suspensions

    COLEMAN W.M. III; PERFETTI T.A.
    R.J. Reynolds Tobacco Company, Winston Salem, NC, USA
    For the first time, the role(s) of selected amino acids and sugars in the production of volatile compounds in microwave prepared heat treated tobacco suspensions (HTTS) has been unambiguously defined. The role can be expressed in two major reaction ...
  2. Beitr. Tabakforsch. Int., 1998, 18-1, p. 15-33., ISSN.0173-783X

    Chiral gas chromatography-selected ion monitoring-mass selective detection analysis of tobacco materials and tobacco smoke

    PERFETTI T.A.; COLEMAN W.M. III
    R.J. Reynolds Tobacco Company, Winston-Salem, NC, USA
    A novel method for the detection, separation, and quantification of the optical isomers of nicotine has been developed. The method has been applied to analyze extracts of tobacco seeds, processed tobacco suspensions, reconstituted tobacco sheet materials, ...
  3. Beitr. Tabakforsch. Int., 1998, 18-1, p. 35-42., ISSN.0173-783X

    Chiral gas chromatography-selected ion monitoring-mass selective detection analysis of secondary alkaloids in tobacco and tobacco smoke

    PERFETTI T.A.; COLEMAN W.M. III
    R.J. Reynolds Tobacco Company, Winston-Salem, NC, USA
    Chiral gas chromatography-mass selective detection has been successfully employed in the analysis of secondary alkaloids in selected tobacco, materials and cigarette smoke condensate. No extensive sample preparation is involved. A lower detection limit of ...
  4. Bull. Spec. CORESTA Congress, Brighton, 1998, p. 103, APOST2

    Researches concerning the production of tobacco seedling in Float system using trays with cells

    DIMA A.; CIRNICI M.; CIUPERCA A.; MILITARU D.
    Central Research Station for Tobacco Culture and Industrialization, Bucharest, Romania.
    During 1996-1997 a programme for obtaining tobacco seedlings by unconventional methods was conducted in Romania. The tests were made in three experimental fields of the Central Research Station for Tobacco Growing and Industrialization in Bucharest, in ...
  5. Bull. Spec. CORESTA Congress, Brighton, 1998, p. 107, APOST8

    Types of Virginia Bright tobacco barns (or other vegetable materials) made in Romania

    RAC-HRISTOV C.; MARINESCU L.
    Central Research Station for Tobacco Culture and Industrialization, Bucharest, Romania.
    To be used in industrialisation process, green leaves of Virginia tobacco have to be harvested at proper time and then put to a yellowing, curing and fermentation technology treatment. When the green leaves are harvested the assimilation phenomenon stops, ...
  6. Bull. Spec. CORESTA Congress, Brighton, 1998, p. 145, PPOST05

    Using haploidy by androgenesis and embryoculture in tobacco breeding

    CIUPERCA A.; CIRNICI M.; DIMA A.
    Central Research Station for Tobacco Culture and Industrialization, Bucharest, Romania.
    In order to fulfill the main purposes of tobacco breeding (high yield potential, superior chemical and industrial quality, resistance to the main diseases of tobacco), the creation of a large genetic variability is needed. The classic methods for the ...
  7. Bull. Spec. CORESTA Congress, Brighton, 1998, p. 166, ST17

    Cigarette smoke yields obtained using averaged human puffing profiles vs. actual human profiles: what do standardized machine yields really tell us?

    ROBINSON J.H.; EDWARDS D.W.; GUY T.; MORGAN W.T.; GROHS M.L.; STILES M.F.
    R.J. Reynolds Tobacco Company, Winston-Salem, NC, USA
    The standardized machine smoking regimen that has been used for decades to rank cigarette smoke yields has recently been challenged by some because it does not precisely predict each smoker’s individual intake of ‘tar’ and nicotine. Surprisingly, the ...
  8. Bull. Spec. CORESTA Congress, Brighton, 1998, p. 169, ST21

    The inhibitory effect of cotinine or cigarette smoke on the formation of O<sup>6</sup>-methylguanine adducts in the lung and liver of A/J mice treated with 4-(methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK)

    DOOLITTLE D.J.; BROWN B.G.; AYRES P.H.; CHANG C.J.G.
    R.J. Reynolds Tobacco Company, R&D, Winston-Salem, NC, USA
    4-(Methylnitrosamino)-1-(3-pyridyl)-1-butanone (NNK), a tobacco-specific nitrosamine, induces lung adenomas in A/J mice following a single intraperitoneal (i.p.) injection. NNK-induced lung tumorigenesis is thought to involve O 6-methylguanine (O 6 MeG) ...