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Liu J.,China Tobacco Anhui Industrial Co. | Yang B.,Staff Development Institute of CNTC | Zhou Y.,Qinhuangdao Tobacco Machinery Co.
Tobacco Science and Technology | Year: 2014

Aiming at the problems of high breakage and poor processing durability of expanded cut tobacco by traditional CO2 expanded cut tobacco processing, a steaming preconditioning discharger was added next to the expansion tower, which moistened the tobacco as it left the tower. Steam was injected into the compartments in the airlock discharger through uniformly distributed nozzles, to allow the tobacco entering into the airlock being evenly humidified and loosed. The results of application showed that after improvement, the percentage of long strands and cut tobacco yield increased by 1.5 and 0.75 percentage points, respectively. Water stained tobacco was avoided in the process of humidifying. The processing durability of expanded cut tobacco was effectively improved, while the breakage of cut tobacco was reduced. Source


Wang J.,Hefei University of Technology | Wang Y.,Hefei University of Technology | Hu Y.-H.,China Tobacco Anhui Industrial Co. | Wen W.,Hefei University of Technology | And 2 more authors.
Journal of Chinese Mass Spectrometry Society | Year: 2015

An online pyrolysis-vacuum ultraviolet photoionization mass spectrometer (PY-VUV PIMS) was built for the analysis of pyrolysis products of solid materials. Vacuum ultraviolet photoionization is a “soft” ionization method producing few or no fragments of molecular ions, making the identification and interpretation of complex pyrolysis products in real time possible. In this work, the gaseous pyrolysis of polypropylene at the temperatures range of 400 ℃ to 600 ℃ were firstly studied with this new-built setup. A series of mass spectra of gaseous products were obtained, and the time-evolved curves for the products like propylene (m/z 42) and pentadiene (m/z 68) were also recorded. It was found that the increase of temperature can dramatically shorten the reaction time. Due to the effect of secondary reactions, the formation time of pentadiene is a little later than that of propylene produced only from primary reaction. Reactions like chain fission, back-biting, and β-scission contribute to most of the primary reactions. The pyrolysis of tobacco was also performed with PY-VUV PIMS in the temperature range from 400 ℃ to 700 ℃, and the effects of reaction temperature on the pyrolysis products intensity were studied. For relative small molecular weight compounds like propylene (m/z 42), their relative intensities increase all the time as pyrolysis temperature rises. As for acetone/propanal (m/z 58) and some other compounds, their relative intensities first rise to the maximum and then decrease. In the case of relatively large molecular weight compounds like nicotine (m/z 162), they decrease with temperature increases, indicating that it have suffered secondary reactions under high temperature and decomposed into small molecules. Results show that vacuum ultraviolet photoionization mass spectrometry is a powerful method for pyrolysis study, which can offer important information for learning the pyrolysis mechanisms and dynamic processes. ©, 2015, Editorial Board of Journal of Chinese Mass Spectrometry Society. All right reserved. Source


Yao D.,China Tobacco Anhui Industrial Co.
Tobacco Science and Technology | Year: 2015

In order to avoid the flavoring or casing being added to wrong tobacco due to the lack of real-time material information transferring in primary processing line, a Profinet-based mobile Radio Frequency Identification (RFID) control system for flavoring and casing was developed. Wherein an RFID reader was linked to a distributed I/O system through a gateway module and communicated with a master PLC via Profinet. The RFID reader read the information labelled on the flavoring/casing tanks and vehicles, and automatically transferred it to the I/O system and PLC. The realization of automatic read, recognition and identification of vehicle number, tank number, the flavor/casing in tank and the tobacco to be treated ensured the integrity and accuracy of production information and quality information in the process of flavoring and casing, and free the flavor or casing from being added to wrong tobacco. ©, 2015, Editorial Office of Tobacco Science and Technology. All right reserved. Source


Su L.,Hefei University of Technology | Jiang A.,Anhui Normal University | Chen C.,Hefei University of Technology | Wu K.,China Tobacco Anhui Industrial Co. | Cheng X.,Hefei University of Technology
Tobacco Science and Technology | Year: 2013

For better understanding the mechanism of inhibition action of bionic signal molecule (BSM) to the alkaloid accumulation in tobacco after topping, the changes of jasmonic acid (JA) content, and the activities of lipoxygenase (LOX) and ornithine decarboxylase (ODC) in tobacco plants under different treatments, including topping, topping followed by BSM application, and the control, were analyzed. The results showed that: 1) JA content increased in tobacco leaves and roots after topping, while BSM application would inhibit the increasing rate of JA in roots and leaves, particularly in roots, which was reduced by 38.5% in 6 hours after application. 2) LOX activity in tobacco leaves obviously increased within 24 hours after topping. BSM application decreased LOX activity, it decreased the activity peak by 25.0%. 3) ODC activity in roots increased rapidly after topping. BSM application inhibited ODC activity, it reduced the activity peak by 11.2%. 4) By inhibiting LOX activity at the upstream of the wound signal path, then inhibiting JA content and ODC activity, BSM lowered alkaloid accumulation in tobacco after topping. Source


KeLing H.,Anhui University | Ling Z.,Anhui University | JiTao W.,China Tobacco Anhui Industrial Co. | Yang Y.,Anhui University
Acta Societatis Botanicorum Poloniae | Year: 2013

The objective of this study was to investigate the effect of exogenous selenium (Se) supply (0, 2, 4, 8, 16 μM) on the growth, lipid peroxidation and antioxidative enzyme activity of 100 mM NaCl-stressed melon (Cucumis melo L.) seedlings. Salt stress significantly reduced the growth attributes including stem length, stem diameter, dry weight and increased antioxidative enzyme activity [superoxide dismutase (SOD), peroxidase(POD), catalase (CAT)]. Moreover, the plant exhibited a significant increase in electrolyte leakage and malondialdehyde (MDA) content under NaCl stress. Se supplementation not only improved the growth parameters but also successfully ameliorated the adverse effect caused by salt stress in melon seedlings. However, the mitigation of NaCl-stressed seedlings was different depending on the Se concentration. At lower concentrations (2-8 μM), Se improved growth and acted as antioxidant by inhibiting lipid peroxidation and increasing in SOD and POD enzymes activity under salt stress. At higher concentrations (16 μM), Se exerted diminished beneficial effects on growth. Whereas CAT activity was enhanced. The result indicated that Se supplementation had a positive physiological effect on the growth and development of salt-stressed melon seedlings. © The Author(s) 2013. Source

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