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58 results

  1. TSRC, Tob. Sci. Res. Conf., 2019, 73, abstr. 097

    Methodology to determine the particle size distribution, mean, and standard deviation from sieve data

    ST. CHARLES F.K.(1); MORGAN W.T.(2)
    (1) St. Charles Consultancy, Lewisville, NC, USA; (2) RAI Services, Winston-Salem, NC, USA
    A method is described which allows the mean and standard deviation of particle size to be estimated from sieve data. The results can be used to calculate and plot the particle size distribution, the cumulative distribution, percentiles, and guide sieve ...
  2. TSRC, Tob. Sci. Res. Conf., 2018, 72, abstr. 013

    Method development for pH analysis of ends aerosol and e-liquid

    HEFNER T.(1); ST. CHARLES F.K.(2); ANDERSON J.(3)
    (1) R.J. Reynolds Tobacco Company, Winston Salem, NC, USA; (2) St.Charles Consultancy, Winston Salem, NC, USA; (3) Eurofins Lancaster Labs, Winston Salem, NC, USA
    E-liquids are hygroscopic, non-aqueous liquids containing a small amount of water (~3-15%). When the pH of a non-aqueous liquid is measured using conventional methods and calibration buffers, the value can only be regarded as an "apparent pH". ...
  3. TSRC, Tob. Sci. Res. Conf., 2016, 70, abstr. 77

    A robust method for evaluating the pH of e-liquids

    ST. CHARLES F.K.(1); MOLDOVEANU S.(2); SCOTT W.(2)
    (1) St. Charles Consultancy, Lewisville, NC, USA; (2) R.J. Reynolds Tobacco Co., Winston-Salem, NC, USA
    The measurement of pH is one of the simplest and most common analytical methods practiced in the laboratory. The pH-meter is calibrated using certified buffers, the electrode is placed in the solution, and if a reading is obtained, the value is used. In ...
  4. TSRC, Tob. Sci. Res. Conf., 2014, 68, abstr. 40

    Nicotine activity in tobacco

    ST.CHARLES F.K.(1); MOLDOVEANU S.C.(2)
    (1) St. Charles Consultancy, Lewisville, North Carolina, USA; (2) R.J. Reynolds Tobacco Company, Winston-Salem, North Carolina, USA
    The vapor pressure of pure nicotine has been reported in the literature. However, to the best of our knowledge, measurements of the vapor pressure of nicotine from tobacco have not been reported. Nicotine migration from tobacco to cigarette filters during ...
  5. TSRC, Tob. Sci. Res. Conf., 2013, 67, abstr. 38

    The migration during storage, transfer to smoke, and filtration efficiency of nicotine, glycerin, and propylene glycol in cigarettes.

    ST. CHARLES F.K.(1); MOLDOVEANU S.C.(2); MILLS H.D.(2); ANDRESEN N.P.(2)
    (1) St.Charles Consultancy, Winston-Salem, NC, USA; (2) R.J. Reynolds Tobacco Co., Winston Salem, NC, USA
    This study evaluated the migration during storage, transfer to smoke and filtration of nicotine, glycerin and propylene glycol (PG) for cigarettes with cellulose acetate/triacetin filters. Filtration efficiency (FE) and smoke yields were studied for two ...
  6. 45th TWC, Tob. Work. Conf., 2012, abstr. 51b

    Natural chestnut tannins use in tobacco crop

    BARGIACCHI E.; MIELE S.; BERTOLA R.; MILLI G.
    University of Pisa, Dept. of Agronomy and Agroecosystem Management, Via S. Michele degli Scalzi, 2, 56124 Pisa, Italy
    Natural sweet chestnut tannins (NCT), hot water-extracted from untreated wood and membrane-concentrated to 17% DM (13% tannins), are presently diffusing in tobacco crop in Central Italy, as a starter treatment in transplant irrigation water, at 2-5 ...
  7. CORESTA Congress, Sapporo, 2012, Agronomy/Phytopathology Groups, AP 13

    Sustainable tobacco crop in Italy and OPTA’s social responsibility: a model of R&D and technology transfer for tobacco growers

    MILLI G. (1); MIELE S.(2); BARGIACCHI E.(3)
    (1) Fattoria Autonoma Tabacchi (FAT), Città di Castello, Italy; (2) Department of Agronomy and Agroecosystem Management, University of Pisa, Pisa, Italy; (3) Consortium INSTM, Firenze, Italy
    The tobacco crop in Italy has undergone a deep reorganisation over the years, and presently a new reference entity, OPTA (Organisation of Tobacco Producers), including FAT and two other major cooperatives, disseminates sustainable cropping techniques to ...
  8. CORESTA Congress, Sapporo, 2012, Agronomy/Phytopathology Groups, AP 18 (+Poster)

    Infrared thermometers to tune tobacco irrigation at farm level

    MILLI G. (1); MIELE S.(2); BARGIACCHI E.(3)
    (1) Fattoria Autonoma Tabacchi (FAT), Città di Castello, Italy; (2) Department of Agronomy and Agroecosystem Management, University of Pisa, Pisa, Italy; (3) Consortium INSTM, Firenze, Italy
    To detect water stress in tobacco several methods have been proposed. Milli and Miele et al. (2003) determined Virginia Bright tobacco Kc in the area of Città di Castello-Italy by microlysimeters, to calculate effective evapotranspiration (EET) in the ...
  9. TSRC, Tob. Sci. Res. Conf., 2012, 66, abstr. 62

    The quantitative estimation of toxicant dose to cigarette smokers

    ST. CHARLES F.K.(1); MCAUGHEY J.(2); SHEPPERD J.(2)
    (1) St. Charles Consultancy, Winston Salem, NC, USA; (2) British American Tobacco (Investments) Limited, Southampton, UK
    For the risk assessment of cigarette smoke, a reliable estimate of the mass of chemical compounds retained in the body would be beneficial. Filter studies provide estimates of mouth exposure to compounds in cigarette smoke, but do not account for mouth ...