1. Instability of Non-Linear Functional Differential Equations of Fifth Order, Cemil Tunc, - 2. Ring-Opening of Oxiranes using Taeniolite-Supported Tris(β-Diketonato)Zirconium, Yessi Permana, Nobuyuki Ichikuni, Shogo Shimazu 3. Phase Transformation of Rice Husk Ash in the Synthesis of ZSM-5 without Organic Template, Didik Prasetyoko, Neneng Ayunanda, Hamzah Fansuri, Djoko Hartanto & Zainab …