1. 3-Mercaptopropionic Acid as Corrosion Inhibitor for Carbon Steel in CO2 Aerated 1% NaCl Solution with Buffer Control-pH 2. Pyrolysis Process of Mixed Polypropylene (PP) and High-Density Polyethylene (HDPE) Waste with Natural Zeolite as Catalyst 3. The Synthesis of MnFe2O4-Activated Carbon Composite for Removal of Methyl Red From Aqueous Solution 4. Validation Method of Flame-AAS with Micr…