Search Results

47 results

  1. CORESTA Congress, Quebec, 2014, Smoke Science/Product Technology Groups, ST 44

    Investigation of pyrolysis behaviour of lutein in air by thermo gravimetry-single drop micro extraction-gas chromatography-mass spectrometry

    YANG Ji; YANG Liu; WU Yiqin; MIAO Mingming; ZHE Wei; CHEN Yongkuan
    China Tobacco Yunnan Industrial Co., Ltd of CNTC, R&D Center, Kunming, P.R. China
    To investigate the pyrolysis behaviour of lutein in air, an automatic single drop micro extraction (SDME) device for trapping the released fractions was designed and coupled with thermo gravimetry-gas chromatography-mass spectrometry. According to the ...
  2. Tobacco Science & Technology, 2011, 7, p. 60-63., ISSN.1002-0861

    Transfer behavior of some carbonyl flavors in filter and tobacco rod of cigarette

    ZHANG JIE(1); ZONG YONG-LI(1); ZHOU HUI-SHUN(2); PENG SHU-HAI(1); SONG YU-BING(1)
    1. Zhengzhou Tobacco Research Institute of CNTC, Zhengzhou 450001, P.R. China; 2. Technology Center of China Tobacco Jiangxi Industrial Corporation, Nanchang 330096, P.R. China
    Twelve carbonyl flavor samples were added into cut tobacco and filter tips of cigarettes and then analyzed by simultaneous distillation and extraction coupled with GC and GC/MS to determine the ratios of flavor retained in tobacco rod or filter, migrated ...
  3. Tobacco Science & Technology, 2010, 8, p. 41-45., ISSN.1002-0861

    Effects of filter length and ventilation on transfer behavior of some ester flavors in cigarette

    ZHOU HUI-SHUN(1); ZONG YONG-LI(2); ZHANG JIE(2); PENG SHU-HAI(2); SONG YU-BING(2)
    1. Technology Center, P.R. China Tobacco Jiangxi Industrial Corporation, Nanchang 330096, P.R. China; 2. Zhengzhou Tobacco Research Institute of CNTC, Zhengzhou 450001, P.R. China
    In order to investigate the effects of filter length and ventilation on the transfer behavior of some ester flavors in cigarettes, the said ester flavors were injected into cigarettes with filters of various length and ventilation rates. These flavored ...
  4. CORESTA Meeting, Agronomy/Phytopathology, Rovinj, 2009, AP 17

    Characterization of TSNA content in cured leaf of dark fire-cured and dark air-cured tobaccos grown in KY and TN, U.S.A. in 2006-2008

    NIELSEN M.T.; BENNETT C.B.; FUFA S.; HELTSLEY D.; FINCH J.
    U.S. Smokeless Tobacco Manufacturing Co., Nashville, TN, USA
    Tobacco specific nitrosamines (TSNA's) found in the cured leaf of dark tobaccos are formed by the nitrosation of secondary amine alkaloids during post-harvest stages of leaf production. While previous research has identified many factors, including ...
  5. CORESTA Congress, Shanghai, 2008, AP 05

    Down-regulating the nicotine demethylase gene lowers NNN content levels with little or no effect on field performance of Burley and dark tobaccos

    NIELSEN M.; XU Dongmei; LUSSO M.; DAVIS G.; SHEN Yanxin; BAILEY A.; HART F.; CUI Mingwu; NORMAN D.
    U.S. Smokeless Tobacco Co., Winchester, KY, USA
    Down-regulating nicotine demethylase (ND) activity in tobacco using RNAi interference mechanisms or by mutating the ND gene reduces nornicotine formation and should lead to lowering N-nitroso-nornicotine (NNN) levels in cured leaf. Over the past two years ...
  6. CORESTA Congress, Shanghai, 2008, AP 06

    Reducing nicotine conversion: stability of RNAi-mediated and mutant down-regulation of nicotine demethylase

    XU Dongmei; SHEN Yanxin; LUSSO M.; BAILEY A.; NORMAN D.; DAVIS G.; HART F.; CUI Mingwu; NIELSEN M.
    U.S. Smokeless Tobacco Co., Winchester, KY, USA
    Nornicotine, a secondary alkaloid formed from the demethylation of nicotine in tobacco, is the precursor of N'-nitrosonornicotine (NNN), a TSNA formed by nitrosation during tobacco curing. In earlier studies, we reported that GMO (RNAi) and non-GMO ...