红树林植物角果木内生真菌发酵产物的化学成分

通过多种色谱分离方法对角果木根部真菌Fusarium sp.JG13代谢产物的化学成分进行研究,从其发酵液中分离得到五个化合物.利用波谱分析等手段分别鉴定为胸腺嘧啶(1),L-焦谷氨酸甲酯(2),邻苯三酚(3),5,7-二羟基-6,8-二甲氧基-2-甲基色原酮(4),腺苷(5).所有化合物均为首次从角果木真菌发酵产物中分离得到.     

Sol-Gel Preparation of TiO2/SiO2 Nanocomposites and Their Application in Self- cleaning Textiles

The present study involves the preparation of TiO2/SiO2 nanocrystals and their application in self-clcaning wool-polyester fabrics. The TiO2/SiO2 nanocrystals were successfully synthesized and deposited onto wool-polyester fabrics using the low-temperature sol-gel technique. The as-prepared nanoeomposites and the nanocomposites coated samples were characterized by X-ray diffraction （XRD） and scanning electron microscopy （SEM）, respectively. The XRD and SEM results showed that the single-phase anatase nanocrystallites were formed and loaded on the fabric surface successfully. The photocatalytic activities of TiO2 -coated and TiO2/SiO2-coated wool-polyester fabrics were measured by studying photodegradation of methylene blue dye. Comparison of the photocatalytic activity of the coated samples reveals superiority of TiO2/SiO2 modified sample with respect to that of pure TiO2 modified sample. Our observations indicate that by applying this technique to the fabrics, self-cleaning materials can be designed for practical application.