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78 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. CORESTA Meeting, Agronomy/Phytopathology, 2017, Santa Cruz do Sul, AP 53

    Interactions between tobacco bushy top virus and its satellite RNA

    MO Xiaohan(1); ZHANG Lifang(1,2); ZHAO Xingneng(1,2); XU Ping(1,2); LI Yanqiong(1,2); XIA Zhenyuan(1); QIN Xiyun(1); CHEN Hairu(2)
    (1) Yunnan Academy of Tobacco Agricultural Sciences, Kunming, P.R. China; (2) College of Plant Protection, Yunnan Agricultural University, Kunming, P.R. China
    Tobacco bushy top disease (TBTD) has caused significant yield and economic losses in Yunnan Province, China. The disease is caused by an unique virus complex consisting of tobacco bushy top virus (TBTV), TBTV satellite RNA, tobacco vein distorting virus, ...
  4. TSRC, Tob. Sci. Res. Conf., 2017, 71, abstr. 123

    The regulation of microorganism on the formation of TSNAs in tobacco

    ZOU Congming; XIA Zhenyuan; LEI Liping; HUANG Wei; ZHAO Gaokun; JIN Yan; WU Qun
    Yunnan Academy of Tobacco Agricultural Sciences, Kunming, China
    TSNAs in tobacco are directly approved to be the carcinogens which is getting more and more attention than before. The regulation of TSNAs is becoming one of the most important topics of tobacco harm reduction. It has been shown that TSNAs formation is ...
  5. CORESTA Congress, Berlin, 2016, Smoke Science/Product Technology Groups, ST 35

    Development of a method for trace level analysis in the aerosol from a novel tobacco vaporiser

    MASUGI E.(1); SASAMOTO K.(2); OCHIAI N.(2); DAVID F.(3); SANDRA P.(3)
    (1) Japan Tobacco Inc. Tobacco Science Research Center, Yokohama, Kanagawa, Japan; (2) GERSTEL K.K., Tokyo, Japan; (3) Research Institute for Chromatography, Kortrijk, Belgium
    In some markets, a variety of tobacco vaporisers is commercially available. One of the characteristics of tobacco vaporisers is that the generated aerosol contains a lower number of combustion-derived chemicals due to the particular heating system which ...
  6. 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 ...
  7. CORESTA Meeting, Agronomy/Phytopathology, 2015, Izmir, Turkey, AP 03

    The interactions between tobacco vein distorting virus and tobacco bushy top disease-associated RNA

    MO Xiaohan; XU Ping; ZHAO Xingneng; ZHANG Lifang; QIN Xiyun; XIA Zhenyuan
    Yunnan Academy of Tobacco Agricultural Sciences of CNTC, Kunming, Yunnan, P.R. China
    Tobacco bushy top disease is the only plant viral disease caused by the umbravirus/luteovirus complex so far in China, resulting in significant economic losses in tobacco production in the Yunnan Province of China. Tobacco bushy top disease complex is the ...
  8. CORESTA Meeting, Agronomy/Phytopathology, 2015, Izmir, Turkey, AP 41

    Effects of different growth temperatures on alkaloid content and nicotine metabolism in roots, stems and leaves of tobacco (Nicotiana tabacum L.) plants

    JIN Y.F.(1); WANG S.S.(1); LI J.Y.(2); PANG T.(2); ZHANG J.B.(1); GONG M.(1)
    (1) School of Life Sciences, Yunnan Normal University, Kunming, P.R. China; (2) Yunnan Academy of Tobacco Agricultural Sciences, Kunming, P.R. China
    Alkaloids, especially nicotine content, significantly influences quality and flavour types of tobacco leaves, which is differentially regulated by various environmental conditions. To investigate the effects of different growth temperature on alkaloids ...
  9. CORESTA Meeting, Smoke Science/Product Technology, 2015, Jeju, ST 36

    Comprehensive analysis of proteins in tobacco leaf

    MASUGI E.(1); ORTIZ A.(2); YOSHIMURA Y.(1); MITSUI K.(1); DAVID F.(2); SANDRA P.(2); SANDRA K.(2)
    (1) Japan Tobacco Inc., Tobacco Science Research Center, Yokohama, Kanagawa, Japan; (2) Research Institute for Chromatography, Kortrijk, Belgium
    In the last two decades, proteomics has been a vastly expanding field of research. Proteomics aims at the comprehensive and comparative measurement of the proteins present in a sample, e.g. plants. Major developments in separation and analytical sciences ...