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Publication 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 Genetic algorithms-based approach for wavelength selection in spectrophotometric determination of vitamin B12 in pharmaceutical tablets by partial least-squares(2012-01-01) L. Sratthaphut; N. Ruangwises; Silpakorn University; Mahidol Universityhydrochloric acid as solvent. A validation set was employed to verify the models and a commercial sample was analysed. GA-PLS model leads to 86% improvement of predictive ability for vitamin B 12 , when comparing with full spectrum PLS model. It is concludedPublication Metadata only Preparation and characterization of biopolymer film from pomelo pectin and flour(2012-05-15) V. Trisithivanij; P. Tasaso; Mahidol UniversityProperties of biopolymer films which were blended from pectin and flour were investigated. Pectin was extracted from pomelo peel by using hydrochloric acid. The extracted pectin was high methoxyl that was characterized by FTIR. Biopolymer filmPublication 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 A microplate spectrophotometric method for analysis of indole-3-carbinol in dietary supplements using p-dimethylaminocinnamaldehyde (DMACA) as a chromogenic reagent(2022-08-09) Chaisiwamongkhol K.; Phonchai A.; Pon-In S.; Bunchuay T.; Limbut W.; Mahidol University-dimethylaminocinnamaldehyde (DMACA) reagent under acidic conditions. The absorbance of the colored product measured at 675 nm was used to determine the target analyte. To achieve optimal spectrophotometric performance, the DMACA reagent concentration, the hydrochloric acidPublication Metadata only Sensitivity Enhancement of Benzene Sensor Using Ethyl Cellulose-Coated Surface-Functionalized Carbon Nanotubes(2018-01-01) Thanattha Chobsilp; Worawut Muangrat; Chaisak Issro; Weerawut Chaiwat; Apiluck Eiad-Ua; Komkrit Suttiponparnit; Winadda Wongwiriyapan; Tawatchai Charinpanitkul; PTT Public Company Limited; Shinshu University; Chulalongkorn University; King Mongkut's Institute of Technology Ladkrabang; Mahidol University; Burapha Universityof MWCNTs, MWCNTs were treated with hydrochloric acid for 60 min (A60-MWCNTs), while other MWCNTs were treated with oxygen plasma for 30, 60, 90, and 120 min (P30-MWCNTs, P60-MWCNTs, P90-MWCNTs, and P120-MWCNTs, resp.). Pristine MWCNTs, A-MWCNTs, and P...-MWCNTs would be ascribed to the differences in crystallinity and functionalization of MWCNT sidewalls, suggesting that acid and oxygen plasma treatments of MWCNTs would be promising techniques for the improvement of benzene detection.Item 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