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Publication Metadata only Tryptamine as a corrosion inhibitor of mild steel in hydrochloric acid solution(2010-01-01) Pongsak Lowmunkhong; Dusit Ungthararak; Pakawadee Sutthivaiyakit; Mahidol UniversityThe inhibitor effect of tryptamine on the corrosion of mild steel in 0.5 M hydrochloric acid at 30 °C was investigated using linear polarization, potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniquesPublication Metadata only Titanium and iron dissolutions from ilmenite by acid leaching and microbiological oxidation techniques(2013-05-01) Woranart Jonglertjunya; Theeraporn Rubcumintara; Mahidol UniversityThis research was concerned with the solubility of ilmenite (Tin Tailing) in acids (sulfuric, hydrochloric, oxalic and citric) and bioleaching by Aspergillus niger, Penicillium citrinum and Bacillus megaterium. Ilmenite concentrate was soluble in 1....5 M sulfuric acid and 1.5 M hydrochloric acid solutions at 90 °C. However, improved leaching was obtained with 8 and 12 M sulfuric acid solutions. The chemical leaching results for different stirring speeds showed that a speed of 750 rpm was favourablePublication Metadata only Preparation of PMMA/acid-modified chitosan core-shell nanoparticles and their potential as gene carriers(2008-08-01) Nuttaporn Pimpha; Uracha Rattanonchai; Suvimol Surassmo; Praneet Opanasopit; Chonticha Rattanarungchai; Panya Sunintaboon; Thailand National Science and Technology Development Agency; Silpakorn University; Mahidol University) solution. Methyl methacrylate (MMA) was grafted onto four acid-modified chitosans (hydrochloric, lactic, aspartic, and glutamic acids) with MMA conversions up to 64%. The prepared nanoparticles had diameter ranging from 100 to 300 nm characterized by atomic...The core-shell nanoparticles consisting of poly(methyl methacrylate) (PMMA) cores surrounded by various acid-modified chitosan shells were synthesized using a surfactant-free emulsion copolymerization, induced by tert-butylhydroperoxide (TBHPPublication Metadata only Enhanced efficiency of dissolved air flotation for biodiesel wastewater treatment by acidification and coagulation processes(2011-10-03) Cheerawit Rattanapan; Aneak Sawain; Thunwadee Suksaroj; Chaisri Suksaroj; Mahidol University; Prince of Songkla Universitywastewater using acidification with pure hydrochloric acid and pure sulfuric acid at pH = 3 and 1 day retention time were more than 80%, and 50%, respectively. Secondly, Grease & Oil and COD removal efficiencies of biodiesel wastewater using alumPublication Metadata only Encapsulated neem extract containing Azadiractin-A within hydrolyzed poly(vinyl acetate) for controlling its release and photodegradation stability(2009-10-15) Sa A. Riyajan; Jitladda T. Sakdapipanich; Faculty of Science; Mahidol UniversityNeem extract containing Azadiractin-A (neem Aza-A), encased in microcapsules, in a matrix of partially hydrolyzed poly(vinyl acetate) crosslinked with glutaralaldehyde 5% (w/v) and 0.05% hydrochloric acid was prepared via a spray drying techniqueItem Metadata only High Conductivity and Durability Textile Gas Sensor-Based Polyaniline-Decorated-Poly(3,4-ethylenedioxythiophene)/Poly(4-styrenesulfonate) for Ammonia Detection(2022-12-09) Pattanarat K.; Petchsang N.; Osotchan T.; Tang I.M.; Kim Y.H.; Jaisutti R.; Mahidol University(4-styrenesulfonate) (PEDOT/PSS) coated on cotton yarn. Without conventional hydrochloric acid (HCl) doping, the PANi/PEDOT/PSS sensor exhibits a high electrical conductivity of 1343 S cm-1, good sensitivity, and excellent stability for detectingItem Metadata only Conversion of sugarcane bagasse ash to silica-based catalyst support material for synthesis of carbon nanotubes from benzene(2026-04-01) Assawagetmanee M.; Inthapat P.; Chotmunkhongsin C.; Worasuwannarak N.; Aldous L.; Wu K.C.W.; Charinpanitkul T.; Chaiwat W.; Assawagetmanee M.; Mahidol UniversitySugarcane bagasse ash, an abundant agricultural waste with high silica content (68 wt%), was modified through two combined processes of 1 M hydrochloric acid leaching followed by 800 °C calcination for 2 h with a different sequence to tailor its... textural properties. Then, the silica-rich powder was utilized as an Fe catalyst support material for carbon nanotube synthesis. The calcined after acid-leached ash (CLA) samples exhibited a higher silica content of 87.5 wt% with a specific surface area