Search Results

30 results

  1. TSRC, Tob. Sci. Res. Conf., 2019, 73, abstr. 034 (also presented at CORESTA SSPT2019)

    Comparison of a flame ionization detector (GC/FID) to a nitrogen-phosphorus detector (GC/NPD) for gas chromatographic determination of nicotine in conventional and ultra-low nicotine tobacco blends

    STEELMAN D.; STINSON A.; CLARK T.J.
    Liggett Group, Mebane, NC, USA
    The established CORESTA method to determine nicotine in tobacco uses a gas chromatograph coupled with a flame ionization detector (GC/FID) (CRM 62) or that uses a mass spectrometer (GC/MS) (CRM 87). These methods were developed to evaluate...
  2. TSRC, Tob. Sci. Res. Conf., 2019, 73, abstr. 086

    Determination of tobacco alkaloids in consumer products by UPLC-MS/MS using a modified quechers method

    SHIFFLETT J.R.; WITTENBERG J.B.; BEZABEH D.Z.
    Alcohol and Tobacco Tax and Trade Bureau, Beltsville, MD, USA
    The U.S. Alcohol and Tobacco Tax and Trade Bureau (TTB) is responsible for collecting Federal excise taxes on tobacco products. Tobacco products in the U.S. may fall into several taxable categories including cigars, cigarettes, snuff, chewing...
  3. TSRC, Tob. Sci. Res. Conf., 2017, 71, abstr. 048 (also presented at CORESTA SSPT2017)

    A comparison of two different extraction methods for aromatic amines in mainstream smoke using gas chromatography-tandem mass spectrometry (GC/QQQ)

    STINSON A.(1); GILLILAND S.(1); HUCKINS A.(1); BROWN S.S.(2); GILLMAN I.G.(2)
    (1) Liggett Group, Mebane, NC, USA; (2) Enthalpy Analytical, Durham, NC, USA
    The established GC-MS methods for the analysis of aromatic amines (o Anisidine, o Toluidine, 2, 6 Dimethylaniline, 1 Aminonaphthalene, 2 Aminonaphthalene, and 4 Aminobiphenyl) involve complex sample preparation and analyzing the samples on a gas...
  4. TSRC, Tob. Sci. Res. Conf., 2017, 71, abstr. 061

    Simultaneous determination of tobacco alkaloids, tobacco specific nitrosamines, and solanesol in consumer products using UPLC-ESI-MS/MS

    SHIFFLETT J.R.; WATSON L.; McNALLY D.J.; BEZABEH D.Z.
    U.S. Treasury Department, Alcohol and Tobacco Tax and Trade Bureau, Beltsville, MD, USA
    The U.S. Alcohol and Tobacco Tax and Trade Bureau (TTB) is responsible for collecting Federal excise taxes on tobacco products. Tobacco products in the U.S. may fall into several taxable categories including cigars, cigarettes, snuff, chewing...
  5. TSRC, Tob. Sci. Res. Conf., 2017, 71, abstr. 074

    The enantiomeric composition of N'-nitrosonornicotine in air-cured tobacco influenced by nicotine demethylation

    CAI Bin(1); JI Huihua(2); FANNIN F.F.(2); BUSH L.P.(2)
    (1) Guizhou Academy of Tobacco Science, Guiyang City, China; (2) University of Kentucky, Lexington, KY, USA
    N'-nitrosonornicotine (NNN) is a potent and organ-specific carcinogen found in tobacco and tobacco smoke in substantial amounts. The aim of this study was to investigate the variations in NNN enantiomeric composition in nicotine demethylase mutants....
  6. TSRC, Tob. Sci. Res. Conf., 2015, 69, abstr. 101

    Quantitative proteomics analysis the tobacco trichomes under cadmium stress

    FU Qiang; LIN Shifeng; ZOU Jie; YU Jing; ZHANG Xiaolian; REN Xueliang
    Guizhou Academy of Tobacco Sciences, Guiyang City, Guizhou, P.R. China
    Nicotiana tabacum (tobacco) is known to both accumulate and tolerate high levels of heavy metals from polluted soils, its trichomes appeared to be the excretion of toxic metals in the form of inorganic particles To gain a comprehensive understanding...
  7. TSRC, Tob. Sci. Res. Conf., 2015, 69, abstr. 106

    Photosynthetic and growth characteristics of flue-cured tobacco seedlings in well-cellar style transplanting

    LIN Yechun; CHEN Wei; GAO Weichang; CHEN Yi; DING Fuzhang; LI Hongxun; LIANG Guilin; PAN Wenjie
    Guizhou Academy of Tobacco Sciences, Guiyang City, Guizhou, P.R. China
    The well-cellar style transplanting (WCST), widespread in China, was an original transplanting method of flue-cured tobacco, and had obvious advantages when compared to conventional transplanting (CT). WCST accelerated the growth of tobacco...
  8. TSRC, Tob. Sci. Res. Conf., 2015, 69, abstr. 22

    The determination and comparison of ammonia content in tobacco products by ion chromatography and continuous flow analysis

    STINSON A.(1); GILLILAND S.(1); PAOLANTONIO A.M.(2); LOCKHART T.D.(2); GILLMAN I.G.(2)
    (1) Liggett Group LLC, Mebane, North Carolina, USA; (2) Enthalpy Analytical Inc., Durham, North Carolina, USA
    The FDA Center for Tobacco Products (CTP) has identified ammonia as a harmful or potentially harmful constituent (HPHC) in tobacco and tobacco products. However, there is currently not a single, generally accepted method for the determination of...
  9. TSRC, Tob. Sci. Res. Conf., 2015, 69, abstr. 93

    Transcription factor NtPIF1 interacted with NtRAP2.2 to negatively regulate expression of NtPSY

    LEI Bo; DING Fuzhang; ZHAO Huina; CAI Kai; PAN Wenjie; CAI Bin
    Guizhou Academy of Tobacco Sciences, Guiyang City, Guizhou, P.R. China
    Carotenoids are important secondary metabolites in flue-cured tobacco. Phytoene synthase (PSY) is the first specific enzyme in the carotenoid biosynthesis pathways, because of its crucial regulatory role of PSY in the carotenoid pathway, the PSY...