Fungus corrodes silk and makes their products quickly corrosion and crisp. This article disclosed that the silk fabrics treated with finishing resins containing isothiazolone to form the closing film. On the one hand, the film can prevent fungus penetrating into silk fiber matrix. On the other hand, it can make use of the antimicrobial of isothiazolone to improve its function. So the protection method can change the single isolation action to produce double action way and prevent fungus penetrating into silk fiber matrix.

To study the effect of K and Mn substitution on simultaneous removal of NOx and particulate materials (PM), a series of La1-xKxCo1-yMnyO3 (x, y=0.1, 0.2, 0.3, 0.4, 0.5) perovskite-type catalysts were synthesized by complex-combustion method. The catalytic performances of the catalysts were evaluated by temperature-programmed oxidation reaction (TPO). And the catalysts were characterized by XRD, FT-IR, H2-TPR techniques. After introducing K and Mn to LaCoO3 simultaneously, all the samples possess perovskite-type structures and the B-site ions form higher average oxidation state enhancing the catalytic performance obviously. La0.8K0.2Co0.7Mn0.3O3 catalyst exhibits not only the lowest T i(297 °C) temperature but also the lowest Tm (343 °C) temperature. Meanwhile, the NO reduction percentage over this catalyst can reach 97%.