China Tobacco Guizhou Industrial Co.

Guiyang, China

China Tobacco Guizhou Industrial Co.

Guiyang, China
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Xu H.,China Tobacco Guizhou Industrial Co. | Lu D.,China Tobacco Guizhou Industrial Co. | Zhang Y.,China Tobacco Guizhou Industrial Co. | Li W.,Yunnan COMTESTOR Co. | And 2 more authors.
Tobacco Science and Technology | Year: 2017

Taking 90 flue-cured tobacco samples of 3 flavor styles as the research objects, the flavor styles of the samples were determined by sensory evaluation. The samples were extracted by dichloromethane, and the characteristics of GC/MS fingerprints were analyzed by VIP (Variable importance in the projection) method combined with PLS-DA (Partial least squares discriminant analysis). The aroma components influencing the flavor style of flue-cured tobacco were analyzed, and the classification models of the fingerprints and aroma components were built separately. The correlations between the characteristic aroma components and main aroma note of flue-cured tobacco were analyzed, and the aroma components influencing the main aroma note were investigated. The results showed that: 1) 1 533 pieces of information of characteristic fingerprints were screened out, and the validation accuracy, R2, RMSECV and RMSEP of the developed GC/MS fingerprint discrimination model were 96.67%, 0.926, 0.190 and 0.250, respectively. 2) 52 aroma components greatly influencing the classification of flue-cured tobacco flavor style were identified, and the validation accuracy, R2, RMSECV and RMSEP of the developed aroma component classification model were 86.67 %, 0.817, 0.301 and 0.396, respectively. 3) 16 aroma components were introduced via stepwise regression analysis, and the discrimination equations for flue-cured tobacco flavor styles (robust, fresh and medium flavor styles) were established. The back substitution verification indicated that the discrimination accuracies of these equations were 100%, 91.7% and 97.2%, respectively. 4) The selected 16 aroma components significantly correlated to the main aroma note of flue-cured tobacco. All above mentioned discriminant models could identify the flavor style of flue-cured tobacco, the accuracies of characteristic fingerprint model and stepwise regression discriminant equations were higher than that of classification model based on 52 aroma components. © 2017, Editorial Office of Tobacco Science and Technology. All right reserved.


Ouyang J.,China Tobacco Guizhou Industrial Co. | Deng G.,CAS Zhengzhou Research Institute | Zhang Y.,China Tobacco Guizhou Industrial Co. | Zhang Y.,CAS Zhengzhou Research Institute | And 2 more authors.
Tobacco Science and Technology | Year: 2016

In order to improve the usability of tobacco leaves with quality defects, the effects of casing immersion-elution conditions on the leaves were studied. The results showed that: 1) Casing immersion-elution improved the sensory quality of tobacco leaves, the cell structure in the leaves became opener and the chemical composition more harmonious. 2) With cost effective Casing F (propylene glycol), the appropriate immersion-elution conditions were concentration 1.5%-2.5%, at temperature 65℃, for 10-15 sec. 3) The results of production application indicated that comparing with untreated leaves, the processed leaves offered consistent sensory style, slightly better quality, and less carbon monoxide and tar yields. Casing immersion-elution could promote the utilization value of leaves with quality defects. © 2016, Editorial Office of Tobacco Science and Technology. All right reserved.


Ji H.,China Tobacco Guizhou Industrial Co. | Zhang L.,China Tobacco Guizhou Industrial Co. | Liu J.,China Tobacco Guizhou Industrial Co. | Wang F.,China Tobacco Guizhou Industrial Co. | And 2 more authors.
Tobacco Science and Technology | Year: 2016

To investigate the influences of filter type and filter length on filtration efficiency of benzene and its homologues (toluene, ethylbenzene, p-xylene, m-xylene, o-xylene and styrene) in mainstream cigarette smoke, nine Virginia type and two blended type cigarettes with different filters and/or different lengths were tested under ISO and Health Canada intense (HCI) smoking regimes. The levels of benzene and its homologues were determined and the filtration efficiencies of these filters were compared. The results showed that: 1) The levels of benzene and its homologues in mainstream cigarette smoke under HCI smoking regime were significant higher than those under ISO. 2) Smoking regime, filter type and filter length affected the filtration efficiency to these smoke analytes. However, their effects on the filtration were slightly different depending on the exact smoke analyte. The filtration efficiencies were in the order of active carbon combined filter>polypropylene fiber filter>cellulose acetate filter>paper-acetate combined filter. The filtration efficiency to benzene and its homologues increased with the increase of filter length. The filtration efficiency under ISO smoking regime was about double that under HCI smoking regime. The benzene and its homologues were filtered by the filters in the order of styrene>o-xylene>(≈)p-xylene >m-xylene>ethylbenzene>toluene>benzene. © 2016, Editorial Office of Tobacco Science and Technology. All right reserved.


Liu K.,CAS Zhengzhou Research Institute | Wang X.,China Tobacco Guizhou Industrial Co. | Chen L.,CAS Zhengzhou Research Institute | Han L.,CAS Zhengzhou Research Institute | And 3 more authors.
Tobacco Science and Technology | Year: 2016

To study the variation of size distribution of tobacco strips redried by a cylinder dryer, the effects of operational conditions including cylinder wall temperature, hot air temperature, cylinder's rotational speed and material/cylinder volume ratio on the size distribution of redried strips were investigated, and the variation of size distribution of tobacco strips redried by hot air system was analyzed and compared. The results showed that: 1) The variation coefficient of moisture content in strips was less than 2% and the moisture content in strips was uniform at large during the whole process of cylinder redrying. 2) Cylinder wall temperature influenced the redrying time, drying rate and redried strips'temperature significantly (P<0.05); volume ratio affected redrying time and drying rate of strips greatly (P=0.0047); while the hot air temperature and cylinder' s rotational speed did not affect redrying time, drying rate and redried strips'temperature significantly (P>0.05). 3) After cylinder redrying, the percentage of large size strips decreased, that of middle and small size strips increased; the characteristic area of strips reduced, while uniformity coefficient raised. In general, the percentage of large and middle size strips was higher and shrinkage rate was lower at the conditions of cylinder wall temperature 70℃, hot air temperature 80℃-90℃, cylinder's rotational speed 8 r/min and volume ratio 16.16%. 4) Comparing with hot air redrying, the shrinkage rate of strips was obviously lower and the percentage of large and middle size strips was higher under cylinder redrying at the similar drying rate. © 2016, Editorial Office of Tobacco Science and Technology. All right reserved.


Li P.,CAS Zhengzhou Research Institute | Wang S.,Shanghai New Type Tobacco Product Research Institute | Zhang D.,China Tobacco Henan Industrial Co. | Yuan D.,China Tobacco Yunnan Industrial Co. | And 4 more authors.
Tobacco Science and Technology | Year: 2016

To evaluate the suitability of current industrial standard methods in determining the contents of nicotine, moisture, glycerol, 1, 2-propylene glycol, heavy metals, TSNAs and pH of oral tobacco products, collaborative studies were carried out by seven laboratories. The results showed that: 1) For the chemical indexes mentioned above, the ratio of repeatability standard deviation (Sr) to the mean value ranged from 0.20% to 7.20% and the ratio of reproducibility standard deviation (SR) to the mean value was from 1.56% to 32.28%. 2) The sample treatments and chromatography conditions of the current detection methods were suitable to analyze these constituents in oral tobacco products. However, the samples of pouched oral tobacco products must be cut into two parts (e.g., by using scissors) before they were weighed, and the weight of pouch was accounted into the total weight of the sample. 3) Considering the higher moisture content in pouched oral tobacco products, sample weight and extraction solvent volume should be adjusted according to the moisture content in samples. © 2016, Editorial Office of Tobacco Science & Technology. All right reserved.


PubMed | Guiyang University, China Tobacco Guizhou Industrial Co. and Zhejiang University
Type: | Journal: Journal of environmental sciences (China) | Year: 2015

Piriformospora indica, a root-colonizing endophytic fungus of Sebacinales, promotes plant growth and confers resistance against biotic and abiotic stresses. In order to confirm the influence of P. indica on growth, proline, malondialdehyde (MDA), chlorophyll, and cadmium (Cd) amounts in Nicotiana tabacum under Cd stress, hydroponics, pot and field trials were conducted. The results showed that P. indica can store Cd in plant roots and reduce leaf Cd content, reduce the concentration of MDA, and increase the proline and chlorophyll content and the activities of catalase, peroxidase, and superoxide dismutase under hydroponic Cd stress. RT-PCR analysis showed that the relative expression level of genes Gsh2, TaPCS1, oas1, GPX, and Hsp70 in colonized plants was 4.3, 1.4, 2.9, 1.7, and 6.9 fold higher than in un-colonized plants respectively. Cd exposure significantly reduced un-colonized plants agronomic traits compared to P. indica-colonized ones. Our results suggested that P. indica can sequester Cd in roots, so that much less cadmium was transported to leaves, and the increased concentrations of antioxidant enzymes, pigments and proline contents, as well as the higher expression of stress-related phytochelatin biosynthesis genes in P. indica-inoculated plants, may also serve to protect N. tabacum plants against oxidative damage, enhancing Cd tolerance.


Yang J.,Zhengzhou University of Light Industry | Wan Q.,China Tobacco Guizhou Industrial Co. | Chen Y.,China Tobacco Jiangsu Industrial Co. | Sun Z.,China Tobacco Henan Industrial Co. | And 2 more authors.
Tobacco Science and Technology | Year: 2015

The essential oils extracted from laurel leaf with three methods (supercritical CO2 extraction, subcritical CO2 extraction and steam distillation) were added into cigarettes as a flavor separately. The chemical components in the essential oils were analyzed by GC/MS, and the technical parameters in supercritical and subcritical CO2 extraction were optimized with orthogonal experiments. The results showed that: 1) The yield of essential oil reached 2.37% under the optimized parameters of supercritical CO2 extraction, 55℃, 30 MPa, extracting for 1 hour; the yield of essential oil was 2.16% under the optimized parameters of subcritical CO2 extraction, 15℃, 20 MPa, extracting for 1 hour. The yield of essential oil extracted by steam distillation was 1.25%. 2) 66, 62 and 49 aroma components were identified in the essential oils obtained by supercritical, subcritical CO2 extraction and steam distillation, respectively; the major components were 1, 8-cineole, α-terpinyl acetate, linalool, their proportions in the essential oils by supercritical CO2 extraction were 16.43%, 15.68%, 12.84%; by subcritical CO2 extraction were 17.22%, 16.11%, 11.84%; and by steam distillation were 18.39%, 15.60%, 9.60%, respectively. 3) The essential oil obtained by supercritical CO2 extraction were comparable to that by subcritical CO2 extraction, and were superior to that by steam distillation in terms of improving aroma quality and aftertaste and reducing irritancy of cigarette smoke. ©, 2015, Editorial Office of Tobacco Science and Technology. All right reserved.


Wang L.,China Tobacco Machinery Group Co. | Shi Y.,Xuchang Tobacco Machinery Co. | Niu B.,China Pingmei Shenma Group Yangguang Property Ltd Company | Zhou H.,China Tobacco Guizhou Industrial Co.
Tobacco Science and Technology | Year: 2014

To prevent cigarettes from dropping and wrinkling in the elevator in YF17 cigarette storing and conveying system, the flow rate matching and relative movement of cigarettes in elevating passage were analyzed, which indicated that the effective width at the turning section varied while cigarettes travelling through, and the flow rate of cigarettes could not be well matched by a fixed section passage. Therefore, the elevator was improved as following: adopting a swing-link flexible conveying device at the inlet turning section of elevator, controlling vertical elevating section and inlet turning section separately, and adopting resilient conveying device at the outlet turning section. The results of application showed that the cigarette flow rate was precisely controlled and flexibly conveyed, cigarette dropping was completely avoided, the wrinkled cigarettes reduced from 3-4 to 0.5-1.0 cig./minute, and the appearance quality of cigarette was effectively improved.


Ma Y.,China Tobacco Guizhou Industrial Co. | Yang B.,Jiangsu Hengsen Tobacco Mechanical Co. | Hang J.,Nanjing Tuzhi Automation Technology Co.
Tobacco Science and Technology | Year: 2015

Traditional belt tobacco sorting device cannot reject heavy foreign matter effectively, a sorting system incorporating vertical pneumatic separation and spectral sorting technology was designed. The system was mainly composed of a vibrating conveyor, a pneumatic separating chamber, vertical pneumatic conveying duct, spectral detecting and rejecting unit, material-air separation device. Visible light and near infrared multispectral image processing was adopted to identify foreign matter and greenish strips. An open type detection channel with balanced airflow was designed to improve image clarity. Via the classification model developed from the spectral characteristics of strips together with the rejection protection algorithm based on token bucket, the classification and rejection of heavy and light foreign matters were achieved. A total of 150 foreign matters, light or heavy, were uniformly mixed into the blended strips of brand "Huangguoshu (soft 02)" to validate the separation performance and rejection rate of the system. The results showed that: 1) The moisture, fines and dust contents in strips and the percentage of large and middle size strips were not affected by pneumatic conveying basically. 2) With the total foreign matter rejection rate of 89%, the rejection rates of the system for heavy and light foreign matters were more than 96% and 85%, respectively. 3) The designed open detection channel demanded less cleaning work. The system combined pneumatic separation with spectral sorting, it promoted the rejection rate for foreign matters. ©, 2015, Editorial Office of Tobacco Science and Technology. All right reserved.


Liu J.,China Tobacco Guizhou Industrial Co. | Ji H.,China Tobacco Guizhou Industrial Co. | Han W.,China Tobacco Guizhou Industrial Co. | Wang F.,China Tobacco Guizhou Industrial Co. | And 2 more authors.
Tobacco Science and Technology | Year: 2014

A method for simultaneously selectively determining seven benzenes (benzene, toluene, ethyl benzene, p-xylene, m-xylene, o-xylene and styrene) in mainstream cigarette smoke by cold trap and gas chromatography-mass spectrometry (GC/MS) was developed, and the deliveries of the said analytes in mainstream smoke of five cigarette samples of different brands under intense smoking regime and ISO smoking regime were investigated. The benzenes in the gas phase of mainstream cigarette smoke were trapped with cold methanol containing o-xylene-d10 (internal standard), and analyzed by GC/MS under selected ion monitoring mode. The results showed that: 1) The limit of detection and limit of quantification for the seven benzenes were 0.006 and 0.018 μg/cig, respectively. The recoveries ranged from 95.8% to 110.1% with the relative standard deviations (RSDs) of 1.1% to 4.6%. The deliveries of the seven analytes in gas phase of mainstream cigarette smoke under intense smoking regime roughly doubled those under ISO smoking regime. This method is suitable for analyzing the seven benzenes in gas phase of mainstream cigarette smoke.

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