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The Change Of The Structure Of Expanded Tobacco By Carbon Dioxide

Zhang Meihua; Li Guozhong; Bac Yu; Shan Weiqing(Department of Chemical Engineering, Northwest university)  
In the paper, the inner structures and surfaces of fresh tobacco leaf, nonexpanded and expanded tobacco are compared with each other through plant anatomy. The parameters,such as specific surface area, distribution of pore diameters and pore volume etc. of nonexpanded and expanded tobacco are determined by absorption, the results indicate that the differences of the surfaces and inner structures between the nonexpanded and expanded tobacco are remarkable. The surface and inner structure of expanded tobacco are similar to those of the fresh leaf. The results also prove that the expanding occurs mainly in the palisade tissue and upper surface epidermal cells, and it is the cells rather than the interstice of cells that have been expanded.
【CateGory Index】: TS452
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