Search Results

17 results

  1. 49th TWC, Tob. Work. Conf., 2020, abstr. 75

    Tobacco production programming in the Suwannee River Valley of North Florida

    VANN C.D.(1); WYNN K.(1); BROUGHTON D.(1); MOORE J.M.(2); VANN M.C.(3)
    (1) University of Florida, FL USA; (2) University of Georgia, Tifton, GA USA; (3) North Carolina State University, Raleigh, NC USA
    Since the 1920s, the Suwannee River Valley of North Florida has been known for producing premium quality tobacco. Over the years a Tobacco Extension Program has evolved which assists local producers with current production practices, governmental...
  2. 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...
  3. 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". This...
  4. CORESTA Congress, Berlin, 2016, Smoke Science/Product Technology Groups, STPOST 26

    A review of aerosol exposure systems relative to the analysis of cytotoxicity: a CORESTA In vitro Toxicity Testing Sub-Group perspective

    THORNE D.(1); WIECZOREK R.(2); FUKUSHIMA T.(3); SHIN H.J.(4); LEVERETTE R.(5); BALLANTYNE M.(6); LI X.(7); BOMBICK B.(5)
    (1) British American Tobacco, R&D Centre, Southampton, U.K.; (2) Reemtsma Cigarettenfabriken GmbH (an Imperial Brands PLC Company), Hamburg, Germany; (3) Japan Tobacco Inc., Scientific Product Assessment Centre, Yokohama, Kanagawa, Japan; (4) KT&G Corporation, Daejeon, South Korea; (5) RAI Services Company, Winston-Salem, NC, U.S.A.; (6) Covance Laboratories Ltd, Harrogate, U.K.; (7) Zhengzhou Tobacco Research Institute of CNTC, Zhengzhou, P.R. China
    Aerosol exposure systems offer researchers a variety of ways to customise the exposure set-up, modify experimental parameters and provide a novel and versatile platform for in vitro aerosol research. These systems produce an aerosol that more closely...
  5. 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....
  6. 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...
  7. 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...
  8. 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...