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4 results

  1. 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. ...
  2. CORESTA Meeting, Agronomy/Phytopathology, 2015, Izmir, Turkey, AP 16

    Effect of moisture content, nitrate and nitrite on TSNA accumulation in Burley tobacco after high temperature storage

    SUN Wenshu(1); SHI Hongzhi(1); ZHOU Jun(2); YANG Huijuan(1); JI Huihua(3); WANG Jun(1); JACK A.M.(3); BAI Ruoshi(2); XU Dongya(1); JIAO Zheheng(1)
    (1) Henan Agricultural University, National Tobacco Cultivation & Physiology & Biochemistry Research Center, Tobacco Cultivation Key Laboratory of China Tobacco, Zhengzhou, P.R. China; (2) Beijing Cigarette Factory of Shanghai Tobacco (Group) Co., Beijing, P.R. China; (3) University of Kentucky, Lexington, KY, U.S.A.
    Two experiments investigated the effects of various treatments on TSNAs (tobacco-specific nitrosamines) in Burley tobacco (sealed cut rag) after high temperature storage. In Experiment 1, tobacco with five moisture contents (6%, 12%, 17%, 23%, 31%) was ...
  3. CORESTA Congress, Quebec, 2014, Agronomy/Phytopathology Groups, AP 04

    Effect of nitrate levels in tobacco leaves on TSNA formation during storage

    SUN Wenshu(1); SHI Hongzhi(1); ZHOU Jun(2); MA Yanjun(2); YANG Huijuan(1); JI H.(3); BAI Ruoshi(2); JACK A.M.(3)
    (1) Henan Agricultural University, China National Tobacco Cultivation & Physiology & Biochemistry Research Center, Key Laboratory for Cultivation of Tobacco Industry, Zhengzhou, P.R. China; (2) Beijing Cigarette Factory of Shanghai Tobacco (Group) Co., Beijing, P.R. China; (3) University of Kentucky, Lexington, KY, U.S.A.
    Nitrogen oxides and alkaloids are the precursors of tobacco-specific nitrosamines (TSNAs). The objective of this study was to determine the effect of nitrate content on TSNA formation during tobacco storage. Two experiments were done: a field experiment ...
  4. CORESTA Meeting, Agronomy/Phytopathology, 2013, Brufa di Torgiano, AP 28

    Changes in TSNA contents during tobacco storage and the effect of temperature and nitrate level on TSNA formation

    SHI Hongzhi(1); WANG Ruiyun(1); BUSH L.P.(2); ZHOU Jun(3); FANNIN F.F.(2); BAI Ruoshi(3); YANG Huijuan(1)
    (1) Henan Agricultural University, National Tobacco Cultivation & Physiology & Biochemistry Research Center, Zhengzhou, P.R. China; (2) University of Kentucky, Lexington, KY, U.S.A.; (3) Beijing Cigarette Factory of Shanghai Tobacco Group, Beijing, P.R. China
    Samples of Burley, sun-cured and flue-cured tobacco from the main producing areas of relevant tobacco types in China were collected to study the changes in tobacco-specific nitrosamine (TSNA) contents during storage and to investigate the effect of ...