Search Results

8 results

  1. 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". ...
  2. 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 ...
  3. 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 ...
  4. 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 ...
  5. 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 ...
  6. TSRC, Tob. Sci. Res. Conf., 2008, 62, abstr. 17

    Trap marker study of the characteristic aroma of Oriental tobacco-like in N. tabacum L

    REN MIN; WANG RIXIN; LIA XINGHUA
    Chinese Academy of Agricultural Sciences, Tobacco Research Inst., Qingdao, China
    Aroma plays an important role in evaluating the quality of tobacco leaves. The purpose of this study was to screen genetic marker which linked with the gene of characteristic aroma of Oriental tobacco-like. First of all, to evaluate the aroma phenotype of ...
  7. TSRC, Tob. Sci. Res. Conf., 2008, 62, abstr. 24

    Cloning and sequencing of helper component proteinase gens of a new isolate of potato virus Y

    WANG YANYING; HUANG YINGCHUN; WANG FENGLONG
    Tobacco Research Institute, Chinese Academy of Agricultural Sciences, Qingdao, China
    The potato virus Y helper component proteinase (HC-Pro) plays important roles in the transmission of the virus Y by the aphid (Myzus persicae). It will be established a new method for tobacco breeding by transmission mechanism of HC-Pro gene of potato ...