Aliquots of 10 l of each extract solution 10 mgml are

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Unformatted text preview: ar gradient method provides good chromatographic profiles for the different fungal extracts supposed to contain various types of compounds within 30 minutes. NAT-P13 THE EFFECT OF LIGHT AND TEMPERATURE ON THE STABILITY OF ANTHOCYANIN PIGMENT FROM HIBISCUS SABDARIFFA L. 1 Siti Nuryanti, Sabirin Matsjeh, Chairil Anwar and Tri Joko Raharjo 2 2 2 Student of Doctoral Programme, Department of Chemistry, Faculty of Mathematics and Natural Sciences, Gadjah MadaUniversity, Yogyakarta, Indonesia 2 Department of Chemistry, Faculty of Mathematics and Natural Sciences, Gadjah Mada University, Yogyakarta, Indonesia E-mail: sitinoer_untad@yahoo.com A research has been conducted to investigate the effect of light and temperature on the stability of anthocyanin pigment from Hibiscus sabdariffa L. flower. Hibiscus sabdariffa L. was extracted sequentially by n-hexane, ethyl acetate, and methanol–acetic acid 1 % solvent. The anthocyanin pigment was detected in methanol–acetic acid 1 % extract. The anthocyanin pigment then was examined under various conditions of ‘no light’ condition, 25 watt of lighting condition, with the temperature of 20 and 30 °C. The experiment showed that the fact about the presence of light and the increase of temperature causing the anthocyanin pigment unstable. 1 177 23rd-25th June 2010 3rd ICYC 2010 Universiti Sains Malaysia NAT-P14 POTENTIAL ANTIBACTERIAL COMPOUNDS FROM MALAYSIAN SPONGES NEOPETROSIAEXIGUA 1 Haitham N. Qaralleh, Syed Z. Idid, Shehabudin Saad, Deny Susanti and Muhammad Taher 1 1 1 2 1 Department of Biomedical Science, Kulliyyah of Science, International Islamic University Malaysia, Jalan Istana, 25200 Kuantan, Pahang, Malaysia 2 Department of Pharmaceutical Technology, Kulliyyah of Pharmacy, International Islamic University Malaysia, Jalan Istana, 25200 Kuantan, Pahang, Malaysia E-mail: haithym2006@yahoo.com This study was carried out to isolate the active antibacterial compounds from mari ne sponge Neopetrosiaexigua. Using disc diffusion method, methanol extract of N. exigua showed a significant antibacterial activity. Sequentially, liquid-liquid extraction was performed using different polarity solvents (n-hexane, carbon tetrachloride, dichloromethane, n-butanol and water) in order to isolate the active antibacterial compounds. Based on the biological guided fractionation re...
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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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