Basyaruddin abdul rahman qiu yi huan bimo a tejo

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Unformatted text preview: mental work to undergo molecular dynamics simulation. A 15 ns molecular dynamics simulation of nano -emulsion system (water/POEs/Span20) was carried out using OPLS-AA force field. The aggregations of the oil and surfactant molecules were observed throughout the simulation. After 8 ns of simulation, the molecules start to aggregate to form one spherical micelle where the POEs molecules are surrounded by the nonionic surfactant (Span20) molecules with an average size of 4.2 ±0.05 nm. The size of the micelle and the ability of palm-based nano-emulsion to self-assemble suggest that this nano-emulsion can potentially use in transdermal drug delivery system. OTH-O4 EFFECTS OF XYLOPIA FERRUGINEA EXTRACT ON THE CORROSION INHIBITION OF MILD STEEL IN 1 M HYDROCHLORIC ACID Wan Elyn Amira Wan Adnan, Afidah Abdul Rahim and Hasnah Osman School of Chemical Science, Universiti Sains Malaysia, 11800 Pulau Pinang, Malaysia E-mail: afidah@usm.my The leaves of Xylopia ferrunginea was extracted with methanol followed by n-hexane and chloroform. The efficiency of different solvent extracts as corrosion inhibitors for mild steel in 1 M HCl was studied by weight loss, potentiodynamic polarization and electrochemical impedance spectroscopy (EIS) techniques. The results showed that Xylopia ferrunginea could serve as effective green inhibitors for the corrosion of mild steel in 1 M HCl. The effectiveness as corrosion inhibitors is in the order of chloroform >n-hexane >methanol extracts. From the results obtained, the inhibition efficiency increased with inhibitor concentrations for all extracts. Potentiodynamic polarization studies clearly revealed that all extracts behaved as mixed-type inhibitors. The adsorption of the inhibitors on the mild steel surface obeyed the Langmuir’s adsorption isotherm. 236 3rd ICYC 2010 Universiti Sains Malaysia 23rd-25th June 2010 POSTER PRESENTATION (OTHER) OTH-P1 OPTIMIZATION OF LIPASE-CATALYZED SYNTHESIS OF ETHYL VALERATE, A GREEN APPLE FLAVOR USING RESPONSE SURFACE METHODOLOGY 1 MR Salina, M Syamsul Kamar, O Siti Salhah, AR Mohd Basyaruddin and MN Hanina 1 1 2 1 Fa...
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This note was uploaded on 02/17/2011 for the course CHEMISTRY 101 taught by Professor Csr during the Spring '11 term at University of Louisville.

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