1. Characterization of Glucomannan Extracted from Fresh Porang Tubers Using Ethanol Technical Grade 2. Four Flavan-3-ol Compounds From The Stembark of Chisocheton balansae C.DC. (MELIACEAE) 3. Purification of Carbon-Based Magnetic Nanoparticles (CMNs) Produced by Submerged Arc Discharge in Liquid Ethanol/Ethylenediamine 4. Equilibrium and Kinetic Study of Removal Copper(II) from Aqueous Solu…