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Phase and Optical Property Comparison of Silica Bodies in Rice between the Leaf and the Husk
FANG Jiang-yu , MA Xue-long*
(Research Institute of Biodiversity, Huangshan University, Huangshan 245021, Anhui)
Abstract: Silica bodies were isolated from the leaf and the husk of the rice. X-ray diffraction and micro-infrared analysis revealed that the structure of silica bodies from the husk is uniform. They are the same as the standard miner of SiO2. In the leaf, however, the structure of the silica bodies is more complex because there are three types of silica body. The fan silica body, the dumbbell silica body and the irregular silica body have different infrared absorption. The fluorescence microscopy indicated that there are phenols in silica bodies of the leaf because the bodies emitted auto-fluorescence under ultra-violet radiation, whereas no such compounds were found in the silica body from the husk. Therefore, the strong UV absorption peak in 285 nm by the silica body from the husk was conducted by itself. A faint absorption in 290 nm by the silica body from the leaf demonstrates the variability and complexity in the texture and property .
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