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Liu H.,Henan University | Zhang Z.,Henan University | Han J.,Henan University | Xu S.,Henan University | And 3 more authors.
Acta Tabacaria Sinica

Compound microbial agents were applied to quinclorac contaminated soil in tobacco-paddy rotating areas to improve soil ecological environment.. Effects of these agents on rhizosphere soil microbe, microbial biomass C, microbial biomass N, invertase and urease activities were investigated. Results showed that the amounts of tobacco rhizosphere soil microbe (bacteria, fungi, actinomyces), soil microbial biomass C and N in treated soil were increased significantly compared with that in both healthy and contaminated soils. Invertase and urease activities of treated soil were higher than that of contaminated soil but less than that of healthy soil. Compound microbial agents are beneficial in repairing quinclorac-contaminated soils. Source

Yu S.-B.,China Tobacco Hunan Industry Co. | Jin Y.,China Tobacco Hunan Industry Co. | Tan H.-F.,China Tobacco Hunan Industry Co. | Liu Q.,China Tobacco Hunan Industry Co. | Wang S.-T.,China Tobacco Hunan Industry Co.
Advanced Materials Research

A series of compounds were applied as plasticizer in the cellulose acetate filter of cigarette. The data showed that the tested filters with proper plasticizers could effectively remove phenolic compounds from mainstream cigarette smoke. In the test models, Triethyl citrate (TEC) exhibited significant absorption capacity to phenolic compounds in cigarette smoke, and the removal efficiency exceeded 49% in contrast to triacetin. Similar result was obtained in different type of cigarette with TEC tips. The removal efficiency of phenolic compounds was significantly affected by the loading of TEC when the loading of TEC was less than 9 wt%. However, when the loading of TEC was between 9-15 wt%, the removal efficiency showed only slight difference. © (2013) Trans Tech Publications, Switzerland. Source

Jin Y.,China Tobacco Hunan Industry Co. | Yu S.,China Tobacco Hunan Industry Co. | Liu Q.,China Tobacco Hunan Industry Co. | Wang S.,China Tobacco Hunan Industry Co. | And 3 more authors.
Beitrage zur Tabakforschung International/ Contributions to Tobacco Research

Triethyl citrate (TEC) was applied in the preparation of cigarette filter rods by two approaches. One was to utilize TEC as a plasticizer sprayed onto the surface of cellulose acetate (CA) fibers. The other was to apply TEC as an additive coated onto the cellulosic paper of acetate-paper dual filters. Three types of cigarette filter rods, namely, triethyl citrate-cellulose acetate (TEC-CA) filter rods, triethyl citrate-cellulose acetate-paper (TEC-CA-paper) dual filter rods and cellulose acetate-paper-triethyl citrate (CA-paper-TEC) dual filter rods, were manufactured. In order to promote the curing of CA rods, high-frequency radiation was introduced into the procedure of filter manufacture. Then Virginia type cigarettes, combined with the three kinds of prepared filter rods were manufactured and the removal efficiency of phenols from the cigarette mainstream smoke was investigated. The results revealed that no matter where the triethyl citrate was applied as plasticizer or coating additive, the content of phenol, o-, mand p-cresol in cigarette mainstream smoke could be greatly reduced. The optimal removal efficiency for phenol was 50% compared with the control. © 2014,Institut Fur Takforschung GMBH. All right reserved. Source

Peng X.-H.,China Tobacco Hunan Industry Co. | Pu W.-X.,China Tobacco Hunan Industry Co. | Yi J.-H.,China Tobacco Hunan Industry Co. | Zhou Y.,China Tobacco Hunan Industry Co. | And 4 more authors.
Chinese Journal of Applied Ecology

Aimed to explore the ecological reasons for the difference in nicotine content of flue-cured tobacco planted in different regions of Hunan Province, field experiments were conducted in Sangzhi, Liuyang, and Yongzhou counties, the three typical tobacco regions of Hunan Province, taking tobacco variety K326 as the test object. Simultaneously, pot experiments with local soils and guest soils wrere carried out. The nicotine content of mid position tobacco leaves was analyzed at harvest time. Field experiments showed that the average nicotine content of tobacco leaves differed significantly among test sites, with that in Sangzhi being the highest, followed by Liuyang, and Yongzhou. Pot experiments showed that climate had significant effects on the average nicotine content of tobacco leaves, while soil and its interaction with climate had less effects. The contribution rate of climate, soil, and their interaction on the variance of the average nicotine content wras 60. 0%, 12. 8% and 27. 2%, respectively. The main sub-ecological factors closely related to the average nicotine content of flue-cured tobacco planted in different regions of Hunan Province were in turn the cloud cover at maturing stage, the relative humidity, sunshine hours, diurnal temperature variance, and rainfall at root-extending stage, and the average air temperature at vigorous growth stage. Generally, climate was the main ecological factor that led to the nicotine content difference of flue-cured tobacco planted in different regions of Hunan Province. Source

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