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Publication Metadata only Effect of Ionic and Nonionic Carriers in Electrical Field-Flow Fractionation(2016-02-02) Mathuros Ornthai; Atitaya Siripinyanond; Bruce K. Gale; Mahidol University; Huachiew Chalermprakiet University; University of Utahmaterials and biological materials typically have high ionic strengths and high osmotic concentrations, we explore the effect of concentration for phosphate buffered saline (PBS), a typical ionic medium for biological samples, and for two nonionic materials...© 2015 American Chemical Society. A major limitation of electrical field-flow fractionation (ElFFF) is the polarization of the electrodes that occurs when using an ionic carrier liquid. As there is great interest in using ElFFF with biologicalPublication Metadata only Effects of Inorganic Ions and Glucose on Hydrogen Production by Indigenous Microbes in Sewage Sludge(2008) Jaruwan Wongtanet; Benjaphorn Prapagdee; เบญจภรณ์ ประภักดี; เบญจภรณ์ ประภักดี; จารุวรรณ วงค์ทะเนตร; Mahidol University. Faculty of Environment and Resource Studies. Laboratory of Environmental Biotechnology.The effects of inorganic ions (Cl-, K+, Na+ and Mg2+) and glucose concentrations on hydrogen production using sewage sludge microbes were studied. The experiments were investigated in the batch experiment by the heat mixed microorganisms at pH 5....5 and 35 °C. Cumulative hydrogen production increased with time for each ion and concentration to a maximum after 5-6 days. Hydrogen production decreased directly with inorganic ion concentrations. Generally, cumulative hydrogen production for a given timePublication Metadata only Effect of pH, buffer concentration ionic strength and temperature on Ketoconazole stability in acidic solutions(2003) Varaporn Buraphacheep Junyaprasert; Suwanna Techowanich; Opa Vajragupta; Ampol Mitrevej; วราภรณ์ (บูรพาชีพ) จรรยาประเสริฐ; สุวรรณา เตโชวาณิชย์; โอภา วัชระคุปต์; อำพล ไมตรีเวช; Mahidol University. Faculty of Pharmacy. Department of Pharmacy; Mahidol University. Faculty of Pharmacy. Department of Pharmaceutical Chemistry; Mahidol University. Faculty of Pharmacy. Department of Manufacturing PharmacyPublication Metadata only Enhanced electrical conductivity of ceria electrolyte doped with samarium (Ce0.8− x Zrx Sm0.2 O2−δ ) for solid oxide fuel cells(2021-09-01) Bradha Madhavan; Nagaraj Balakrishnan; Branesh Pillai; Ananth Steephen; Rathinam Technical Campus; KPR Institute of Engineering and Technology; Mahidol Universityof CeO2 as 20 nm. Valence state of cations and concentration of Ce4+ are proven through X-ray photo electron spectroscopy (XPS). This result confirms 50% upsurge in tetravalent Cerium concentration (from 56 to 84%) which influences the ionic conductivity...To affluence the ionic conductivity enhancement in Cerium Oxide (CeO2) for low temperature solid oxide fuel cells (LT-SOFCs), we report synthesis of Zr substituted, Samarium doped Ceria (SDC) via chemical procedure. Substitution of Zr has assistedPublication Metadata only Use of nitrogen-doped amorphous carbon nanodots (N-CNDs) as a fluorometric paper-based sensor: A new approach for sensitive determination of lead(ii) at a trace level in highly ionic matrices(2021-08-28) Siwaluck Boonruang; Puttaraksa Naksen; Wipark Anutrasakda; Kantapat Chansaenpak; Vinich Promarak; Rattaporn Saenmuangchin; Chutima Phechkrajang; Purim Jarujamrus; Vidyasirimedhi Institute of Science and Technology; Ubon Ratchathani University; Chulalongkorn University; Thailand National Nanotechnology Center; Mahidol UniversityThis work reports a facile synthesis of nitrogen-doped amorphous carbon nanodots (N-CNDs) and their use as a fluorometric paper-based sensor for the determination of Pb2+ at a low concentration. Both solution-based and paper-based systems were...+ concentration.Publication Metadata only Ionic dependence of the resting membrane potential of rabbit lacrimal gland in vitro(1977-08-01) Chumpol Pholpramool; Sutas Korpaibool; Mahidol Universitybicarbonate solution was -26.7 ± 0.3 mV, insidethe cell negative. 3. 3. Elevation of the external K + concentration ([K + ] 0 ) caused depolarization of the resting potential. When [K + ] 0 was above 5 mM, a tenfold increase in [K + ] 0 decreased the membranePublication Metadata only Encapsulation of Vitamin D3 in Pickering Emulsion Stabilized by Nanofibrillated Mangosteen Cellulose: Effect of Environmental Stresses(2019-11-01) Wiphada Mitbumrung; Manop Suphantharika; David Julian McClements; Thunnalin Winuprasith; University of Massachusetts Amherst; Mahidol Universitystabilized by WPI decreased. NFC provided good stability to the emulsions through a combination of steric and electrostatic repulsion. The EE of vitamin D3 increased with increasing emulsifier concentration. Heating or ionic strength did not significantly (P.... The vitamin D3-enriched emulsions were tested for their stability against temperature (30 °C to 90 °C), pH (2 to 8), and ionic strength (0 to 500 mM NaCl). The mean particle diameter (d32), ζ-potential, and creaming stability of the oil dropletsItem Metadata only Selective extraction of pentacyclic triterpenoids from Centella asiatica using aprotic ionic liquid-assisted techniques(2026-06-01) Nuchtavorn N.; Leanpolchareanchai J.; Julsrigival J.; Akarchariya N.; Nuchtavorn N.; Mahidol UniversityThis study investigates imidazolium-based ionic liquids (ILs) as alternative solvents to improve extraction efficiency for the extraction of pentacyclic triterpenoids from Centella asiatica . Three ILs, [C₄mim]Cl, [C₄mim][CF₃SO₃], and [C₄mim][CH₃SO...₃], were evaluated for the recovery of asiaticoside, madecassoside, asiatic acid, and madecassic acid. Key extraction parameters, including IL concentration, extraction time, temperature, and assisted extraction techniques were optimized to enhance recoveryPublication Metadata only Bio-based dispersants for fuel oil spill remediation based on the Hydrophilic-Lipophilic Deviation (HLD) concept and Box-Behnken design(2021-09-15) Parisarin Nawavimarn; Witchaya Rongsayamanont; Tipsuda Subsanguan; Ekawan Luepromchai; Faculty of Environment and Resource Studies, Mahidol University; Chulalongkorn Universitymicroemulsion, which promoted petroleum mobilization. The hydrophilic-lipophilic deviation (HLD) equations for ionic and nonionic surfactant mixtures were compared, and it was found that the ionic equation was applicable for the calculation of lipopeptides... and Dehydol LS7TH concentrations. The best formula contained 6.6% w/v lipopeptides and 11.9% w/v Dehydol LS7TH in seawater, and its dispersion effectiveness for bunker fuels A and C was 92% and 78%, respectively. The application of bio-based dispersantsItem Metadata only Formulation Development of Serum Beads: Investigating the Influence of Sodium Alginate/Iota Carrageenan Ratio on Bead Characteristics(2024-05-01) Woraphokanunt Y.; Teeranachaideekul V.; Rittiboon A.; Jatupornpipat M.; Woraphokanunt Y.; Mahidol UniversityBackground and Objectives: To develop cosmetic products by using Ionic gelation techniques as the main technique in the production of serum beads. The purpose of this study is to develop the serum beads recipe by studying the ratio of various types... of gelling agents for complete serum beads products. Methodology: Test the ratio of gelling agents in serums that create beads with ionic gelation techniques by Sodium Alginate and Iota-carrageenan which affect the appearance and beads texture after forming